An industrial boiler is a closed pressure vessel that converts fuel energy into steam or hot water for manufacturing processes, power generation, and industrial heating. The main types used in Indian industries are fire tube boilers (low-medium pressure, 0.5–25 TPH), water tube boilers (high pressure, 2–500+ TPH), biomass boilers (rice husk, bagasse, wood chips), gas-fired boilers, oil-fired boilers, thermic fluid heaters, waste heat recovery boilers, and electric boilers. Industrial boilers must comply with IBR certification in India and achieve thermal efficiencies of 78–92% depending on type, fuel, and accessories. Leading manufacturers include Par Boiler Pvt. Ltd., Thermax, Forbes Marshall, Cheema Boilers, and ISGEC.
Every factory, every manufacturing facility, and most commercial buildings in India have one thing in common: they need heat. Not just any heat controlled, reliable, pressurised heat in the form of steam or hot water that can be distributed through a plant, used in process equipment, or fed to a turbine for power generation. The equipment that provides this heat is an industrial boiler.
A boiler is not a single product. It is a category of pressure vessels covering dozens of designs, fuel types, capacity ranges, and operating philosophies each suited to a specific combination of industry, process requirement, and fuel availability. Choosing incorrectly costs money for the next twenty years. Understanding the options clearly before deciding is the right starting point for any procurement or specification process.
This complete guide covers everything what an industrial boiler is, how it works, the types available in India in 2026, the key components and what each does, the industries that depend on them, and how to select the right one for your plant.
An industrial boiler is a closed pressure vessel that burns fuel coal, biomass, natural gas, diesel, or uses electricity to heat water and produce steam or hot water for industrial processes. Steam generated by the boiler is used for process heating, sterilisation, drying, power generation, and manufacturing operations across industries including textile, food, pharmaceutical, chemical, sugar, dairy, paper, and power generation. Industrial boilers in India must comply with the Indian Boilers Regulation (IBR) Act, 1950, and operate at pressures from 7 kg/cm² to 90+ kg/cm² depending on the application.
The working principle of every industrial boiler regardless of type, fuel, or size is the same at its core: fuel combustion generates heat, heat transfers to water, water converts to steam. The engineering that makes this process efficient, reliable, and safe is what differentiates boiler designs.
Step 1 — Water supply: Feed water from a deaerator or feed water tank is pumped into the boiler by the feed pump through the feed check valve. The feed water must meet quality parameters low dissolved oxygen, controlled pH, low total dissolved solids or scale deposits and corrosion degrade the boiler's heat transfer surfaces and shorten its service life.
Step 2 — Combustion in the furnace: Fuel and air mix in the burner assembly and ignite in the furnace. The furnace is lined with refractory or water-cooled membrane walls in water tube boilers, the furnace walls are entirely tubes carrying water, absorbing heat from the flame by radiation. Combustion efficiency is determined by air-to-fuel ratio, burner design, and furnace geometry.
Step 3 — Heat transfer: Hot combustion gases transfer heat to the water through two mechanisms: radiation heat transfer in the furnace (very high heat flux, short distance) and convection heat transfer in the gas passes through tube banks downstream of the furnace (lower heat flux, longer contact). In a fire tube boiler, hot gases travel inside the tubes transferring heat to the surrounding water. In a water tube boiler, water inside the tubes absorbs heat from gases flowing over the outside.
Step 4 — Steam generation: Water heated to saturation temperature at the boiler's operating pressure converts to steam. In water tube boilers, the steam-water mixture rises through the evaporator tubes to the steam drum where steam and water separate. In fire tube boilers, steam accumulates in the steam space above the water surface in the boiler shell.
Step 5 — Steam distribution: Steam exits through the main steam stop valve and enters the plant's steam distribution pipework. Safety valves release excess pressure if operating pressure rises above the set point, protecting the system from overpressure.
Step 6 — Flue gas exhaust: Combustion gases exit through the economiser (which preheats feed water), air preheater (which preheats combustion air), and the chimney to atmosphere. Air pollution control equipment cyclone separators, bag filters, or electrostatic precipitators captures particulate from solid fuel combustion before discharge.
Every industrial boiler consists of pressure parts the components that contain steam or water under pressure and non-pressure parts the components that support combustion, heat transfer, control, and safety. Both categories are critical to reliable, efficient, and safe operation.
| Component | Category | Function |
|---|---|---|
| Boiler Shell / Drum | Pressure part | Main pressure vessel containing water and steam space |
| Steam Drum | Pressure part | Separates steam from steam-water mixture in water tube boilers |
| Mud Drum | Pressure part | Lower drum in bi-drum designs water settling and downcomer supply |
| Fire Tubes / Water Tubes | Pressure part | Heat transfer surfaces hot gas inside (fire tube) or water inside (water tube) |
| Furnace / Combustion Chamber | Pressure part | Enclosed space where fuel burns; radiation heat transfer to water walls |
| Superheater | Pressure part | Heats saturated steam above saturation temperature for turbine applications |
| Economiser | Pressure part | Preheats feed water using residual flue gas heat improves efficiency 3–8% |
| Air Preheater | Heat recovery | Preheats combustion air using flue gas improves efficiency 2–5% |
| Burner | Combustion | Mixes fuel and air and maintains stable combustion flame |
| Safety Valve | Safety | Releases steam automatically if pressure exceeds set limit mandatory IBR requirement |
| Water Level Indicator | Safety / Control | Shows water level in drum low level is a critical safety alarm condition |
| Pressure Gauge | Instrumentation | Indicates steam pressure inside boiler shell or drum |
| Feed Check Valve | Safety | Prevents backflow from boiler to feed pump if pump stops |
| Steam Stop Valve | Control | Main isolation valve between boiler steam space and distribution pipework |
| Blowdown Valve | Water quality | Discharges concentrated boiler water to control TDS and remove sludge |
| Feed Water Pump | Mechanical | Pumps feed water into boiler against operating pressure |
For a complete guide to the auxiliary equipment that supports industrial boiler operation, see our industrial boiler accessories guide covering economisers, feed pumps, steam traps, deaerators, and the full range of supporting equipment.
| Boiler Type | Pressure Range | Capacity | Fuel | Best Application |
|---|---|---|---|---|
| Fire Tube Boiler | 7 – 18 kg/cm² | 0.5 – 25 TPH | Gas, oil, diesel | Food, pharma, dairy, hotels, hospitals |
| Water Tube Boiler | 20 – 90+ kg/cm² | 2 – 500+ TPH | Gas, oil, coal, biomass | Power, chemical, sugar, textile, paper |
| Packaged Boiler | 7 – 18 kg/cm² | 0.5 – 10 TPH | Gas, oil, diesel | Quick installation, space-limited plants |
| Biomass FBC Boiler | 10 – 45 kg/cm² | 2 – 50 TPH | Rice husk, bagasse, wood chips, agro-waste | Rice mills, textile, sugar, paper |
| Coal Fired Boiler | 10 – 65 kg/cm² | 3 – 200 TPH | Coal (various grades) | Power, cement, steel, large industrial |
| Gas Fired Boiler | 7 – 25 kg/cm² | 0.5 – 30 TPH | Natural gas (PNG), LPG | Food, pharma, chemical, urban plants |
| Oil Fired Boiler | 7 – 20 kg/cm² | 0.5 – 20 TPH | Diesel, LDO, furnace oil | Industrial where gas unavailable, backup |
| Electric Boiler | 7 – 20 kg/cm² | 0.1 – 5 TPH | Electricity | Lab, pharma clean room, zero emission |
| Thermic Fluid Heater | 0.3 – 0.5 kg/cm² (thermal oil) | 1 – 60 lakh kcal/hr | Gas, oil, coal, biomass | Textile, chemical, rubber, food (high-temp) |
| Waste Heat Recovery Boiler | 10 – 65 kg/cm² | 0.5 – 100 TPH | Exhaust gas (no additional fuel) | DG set, cement kiln, glass furnace, GT |
| Hot Water Boiler | 3 – 15 kg/cm² | 0.5 – 10 TPH equiv. | Gas, oil, biomass | Hotels, hospitals, space heating, dairy |
In a fire tube boiler, hot combustion gases flow through tubes surrounded by water. The tubes carry the fire hence "fire tube." The main combustion chamber (furnace tube or Morrison tube) is itself a large cylindrical tube that forms the first-pass combustion space. Gases then pass through additional banks of smaller fire tubes in second, third, or fourth passes before exiting through the chimney.
Best for: Small to medium capacity applications (0.5–15 TPH) at low to medium pressure (up to 18 kg/cm²). Gas, oil, or diesel fuel. Food processing, pharmaceutical, dairy, hotels, hospitals, and general process heating. Lower capital cost than water tube designs at equivalent capacity. Compact, factory-assembled packaged designs commission quickly. See our complete fire tube vs water tube boiler comparison guide for a detailed analysis of both designs across all selection parameters.
In a water tube boiler, water flows inside the tubes and hot combustion gases flow over the outside. The furnace is lined with water-cooled membrane wall tubes that absorb heat from the flame by radiation. The tube bank downstream absorbs heat by convection as the flue gases cool. Natural circulation carries the steam-water mixture from the evaporator tubes to the steam drum at the top.
Best for: High pressure (above 20 kg/cm²), high capacity (above 10 TPH), superheated steam, and solid fuel (coal, biomass) applications. Chemical plants, sugar mills, textile mills, paper plants, power generation, refineries, and fertilizer plants. Learn more in our water tube boiler working, types, and advantages guide.
Biomass boilers burn agricultural residues (rice husk, bagasse, wood chips, groundnut shells, cotton stalks) as fuel. Most modern biomass boilers use Fluidized Bed Combustion (FBC) burning fuel in a turbulent bed of hot sand at 750–900°C which achieves 88–96% combustion efficiency with high-ash fuels like rice husk that cause grate clinker problems in conventional designs. For a complete guide to biomass boiler types, fuels, and selection, see our biomass boiler working, fuel types, and manufacturers guide.
Gas-fired boilers use natural gas (PNG pipeline) or LPG as fuel with a modulating industrial burner. Clean combustion, no ash, no dust collection requirements, and precise temperature control make gas-fired boilers the standard choice for pharmaceutical, food, and urban industrial applications. For a complete guide see our industrial gas boiler working, types, and price guide.
A thermic fluid heater uses thermal oil rather than water as the heat transfer medium, delivering 150°C–350°C process heat at near-atmospheric pressure (0.3–0.5 kg/cm²) making it ideal for high-temperature processes in textile, chemical, rubber, and food industries that cannot justify a high-pressure steam boiler. For a complete technical guide see our complete thermic fluid heater guide.
Waste heat recovery boilers capture thermal energy from industrial exhaust gas streams DG set exhaust, cement kiln exit gas, glass furnace flue gas and convert it to steam without burning any additional fuel. For a complete guide to WHRB types, applications, and ROI calculation see our top waste heat recovery boiler manufacturers guide.
Steam generated by industrial boilers touches almost every manufacturing process in India. Its role is rarely limited to "heating" steam is an energy carrier that can do physical work (driving turbines), transfer heat without direct contact (jacketed vessels), maintain sterility (autoclaves, sterilisers), and condition the atmosphere of a manufacturing environment.
| Industry | How Steam Is Used | Typical Boiler Type |
|---|---|---|
| Food Processing & FMCG | Sterilisation, cooking, blanching, CIP cleaning | Gas or oil fired fire tube, packaged |
| Pharmaceutical | Clean steam for autoclaves, sterilisation, GMP processes | Gas fired fire tube, electric boiler |
| Textile Industry | Dyeing, bleaching, finishing, stenter heating | Biomass FBC water tube, gas fire tube |
| Chemical Industry | Reactor heating, distillation, heat exchangers | High-pressure water tube |
| Sugar Industry | Juice evaporation, pan heating, co-generation | Bagasse CFBC water tube |
| Paper & Pulp | Pulping, drying, co-generation | Large capacity water tube |
| Dairy Industry | Pasteurisation, UHT processing, CIP | Gas or oil fire tube packaged |
| Rice Mill | Parboiling, drying | Rice husk FBC biomass boiler |
| Power Generation | Turbine steam for electricity generation | High-pressure water tube |
| Hotels & Hospitals | Laundry, sterilisation, hot water, kitchen | Gas or oil packaged fire tube, hot water |
Boiler thermal efficiency is the percentage of fuel energy input that is converted to useful steam output. Modern industrial boilers achieve 78–92% thermal efficiency depending on design, fuel type, and heat recovery accessories. The gap between 78% and 92% translates directly to fuel cost a 5 TPH boiler operating 20 hours per day on natural gas at ₹48/m³ saves approximately ₹3–5 lakh per month at 90% versus 80% efficiency.
| Boiler Design | Without Accessories | With Economiser | With Economiser + APH |
|---|---|---|---|
| 2-Pass Fire Tube | 75 – 78% | 80 – 84% | 83 – 86% |
| 3-Pass Fire Tube | 78 – 82% | 83 – 86% | 85 – 88% |
| Water Tube (D-type) | 80 – 84% | 85 – 88% | 87 – 91% |
| Bi-Drum Water Tube | 82 – 86% | 86 – 89% | 88 – 92% |
| FBC Biomass Boiler | 82 – 86% | 86 – 89% | 88 – 91% |
APH = Air Preheater. Efficiency values are indicative at full load operation. Actual efficiency depends on fuel quality, operating pressure, load factor, and maintenance condition. For practical steps to improve boiler efficiency in an operating installation, see our guide on how to improve boiler efficiency.
| Boiler Type | Capacity | Fuel | Approx. Price Range (₹) |
|---|---|---|---|
| Packaged Fire Tube | 0.5 – 3 TPH | Gas / Oil | ₹10 lakh – ₹35 lakh |
| Fire Tube Boiler | 3 – 10 TPH | Gas / Oil | ₹35 lakh – ₹80 lakh |
| Biomass FBC Boiler | 3 – 10 TPH | Rice husk / wood | ₹60 lakh – ₹1.9 crore |
| Water Tube Boiler | 10 – 30 TPH | Coal / biomass / gas | ₹1.5 crore – ₹5 crore |
| Thermic Fluid Heater | 5 – 20 lakh kcal/hr | Gas / solid fuel | ₹12 lakh – ₹50 lakh |
| Waste Heat Recovery Boiler | 1 – 10 TPH | Exhaust gas (no fuel) | ₹15 lakh – ₹1.5 crore |
| Electric Boiler | 0.1 – 2 TPH | Electricity | ₹5 lakh – ₹30 lakh |
Prices are indicative 2026 estimates excluding pollution control equipment, civil foundation, installation, and IBR registration. Contact Par Boiler for a site-specific quotation.
IBR (Indian Boilers Regulation) certification is a mandatory statutory requirement under the Indian Boilers Regulation Act, 1950, for all boilers operating above 1 kg/cm² steam pressure with steam volume above 22.75 litres. Every IBR boiler must have design drawings approved by the Central Boiler Board (CBB), be fabricated from certified materials inspected at each production stage, pass a hydraulic pressure test at 1.5× working pressure before dispatch, and receive periodic annual inspection by an IBR-authorised inspector during operation. Operating an industrial boiler in India without current IBR registration and inspection certification is a statutory violation that can result in plant closure.
For a complete guide to IBR compliance requirements, safety system obligations, and the annual inspection process, see our boiler safety guidelines for industries.
| Manufacturer | Location | Key Products | Industries | Core Strength |
|---|---|---|---|---|
| Par Boiler Pvt. Ltd. | Ahmedabad | Fire tube, water tube, biomass FBC, THF, WHRB, HAG | Textile, food, chemical, pharma, rice mills | 25+ years, custom engineering, full product range |
| Thermax | Pune | Biomass, waste-to-energy, WHR, large boilers | Power, chemical, large process | Scale, sustainability engineering |
| Forbes Marshall | Pune | Oil/gas, WHR, process boilers, steam systems | Process industries | Steam system efficiency, instrumentation |
| Cheema Boilers | Pan-India | AFBC, biomass, vibrating grate, WHR | Sugar, paper, power | High-capacity biomass and FBC |
| ISGEC Heavy Engineering | Pan-India | Process boilers, power boilers, WHR | Power, sugar, chemical | Heavy engineering, large capacity |
For a comprehensive reference on all major industrial boiler manufacturers operating in India across all boiler types and capacity ranges, see our complete guide to top 10 boiler manufacturers in India. For a structured evaluation framework when comparing suppliers, our boiler manufacturer selection checklist covers all the criteria procurement teams should verify before placing a purchase order.
| Selection Criteria | What to Determine |
|---|---|
| Steam output required (TPH) | Sum all steam-consuming process loads at peak simultaneous operation, add 15–20% margin |
| Operating pressure (kg/cm²) | Highest process pressure requirement determines minimum boiler pressure class |
| Fuel type and availability | What fuel is physically available at your site and at what delivered cost per year |
| Direct or indirect firing | Does the process require steam or hot water (steam boiler) or high-temperature dry heat (thermic fluid heater or hot air generator)? |
| IBR compliance requirement | Confirm which boiler components require IBR certification for your operating pressure and capacity |
| Superheated steam requirement | If a steam turbine is connected, superheated steam is required water tube design is mandatory |
| Pollution control requirements | CPCB/SPCB consent conditions specify outlet PM limits confirm APC equipment specification |
| Service and spare parts | Are local service engineers available from the manufacturer within 24–48 hours? |
A correctly maintained industrial boiler operates reliably for 15–25 years. A neglected boiler fails its IBR inspection, consumes excess fuel through fouled heat transfer surfaces, and creates safety risks for operators. Maintenance discipline is the single largest determinant of boiler reliability and longevity after initial specification quality.
For a complete structured maintenance programme covering all boiler types and all maintenance frequencies, our industrial boiler maintenance checklist provides the full inspection framework used by plant teams across India.
Every solid fuel industrial boiler coal, biomass, agro-waste requires air pollution control equipment to meet CPCB and SPCB emission standards for particulate matter. The standard configuration for a 3–15 TPH solid fuel boiler is a multi-cyclone separator followed by a pulse jet bag filter. For a complete reference on APC equipment selection and specification, see our guides on air pollution control solutions for industrial plants, bag filter selection for industrial boilers, and wet scrubber manufacturers in India.
An industrial boiler is a closed pressure vessel that burns fuel coal, biomass, natural gas, diesel, or uses electricity to convert water into steam or hot water for manufacturing processes, power generation, and industrial heating. Steam produced by industrial boilers is used for process heating, sterilisation, drying, power generation via turbines, and manufacturing operations across industries including textile, food, pharmaceutical, chemical, sugar, dairy, paper, and power generation.
The main types are: fire tube boilers (gas, oil low-medium pressure, 0.5–25 TPH), water tube boilers (coal, biomass, gas high pressure, 2–500+ TPH), biomass FBC boilers (rice husk, bagasse, wood chips), packaged boilers (factory-assembled fire tube), thermic fluid heaters (thermal oil, 150–350°C), waste heat recovery boilers (no additional fuel), hot water boilers (for heating applications), and electric boilers (zero on-site emissions).
Fuel burns in the furnace generating heat. In fire tube boilers, hot gases pass through tubes surrounded by water heat transfers from gas to water. In water tube boilers, water flows through tubes with hot gases outside heat transfers from gas through tube wall to water. Water heated to saturation temperature converts to steam that accumulates in the steam space or steam drum and exits through the main steam outlet at operating pressure.
Fire tube: hot combustion gases pass inside the tubes, water surrounds them outside. Suitable for low-medium pressure (up to 18 kg/cm²) and small-medium capacity (0.5–15 TPH). Lower capital cost, simpler maintenance. Water tube: water passes inside the tubes, hot gases outside. Suitable for high pressure (20–90+ kg/cm²) and large capacity (2–500+ TPH). Higher efficiency, faster load response, required for superheated steam and turbine applications.
IBR (Indian Boilers Regulation) certification is mandatory under the Indian Boilers Regulation Act, 1950, for boilers operating above 1 kg/cm² with steam volume above 22.75 litres. It requires CBB design approval, certified materials, stage inspection during fabrication, hydraulic pressure test at 1.5× working pressure, IBR certificate before commissioning, and annual IBR inspection during operation. Operating an IBR boiler without current certification is a statutory violation.
Indian industrial boilers use natural gas (PNG), LPG, diesel, light diesel oil (LDO), furnace oil, coal (various grades), rice husk, bagasse, wood chips, groundnut shells, cotton stalks, bamboo waste, other agro-residues, biomass pellets, and exhaust gas (waste heat recovery boilers). Fuel selection depends on local availability, price, required steam quality, and CPCB emission compliance requirements for that fuel type at the plant location.
Boiler thermal efficiency is the percentage of fuel energy input converted to useful steam output measured by the direct method (steam output energy ÷ fuel input energy × 100) or the indirect method (100% minus all identified heat losses). Modern industrial boilers achieve 78–92% efficiency depending on type, fuel, and heat recovery accessories (economiser, air preheater). Each additional percentage point directly reduces monthly fuel cost.
An economiser is a heat exchanger installed in the flue gas path downstream of the main boiler. Flue gas exiting the boiler still contains significant heat the economiser transfers this residual heat to incoming feed water, preheating it before it enters the boiler drum. Each 6°C rise in feed water temperature from economiser heating improves boiler efficiency by approximately 1%. An economiser typically improves boiler efficiency by 3–8% depending on flue gas temperature and feed water inlet temperature.
A thermic fluid heater uses synthetic or mineral thermal oil as the heat transfer medium instead of water, operating at near-atmospheric pressure (0.3–0.5 kg/cm²) while delivering 150–350°C process heat. A steam boiler uses water and generates pressurised steam. Thermic fluid heaters avoid IBR registration above the pressure threshold, have no condensate loss, no steam traps, and no water treatment costs making them preferred for high-temperature applications in textile, chemical, rubber, and food industries where a high-pressure steam boiler would be over-specified.
Industrial boiler prices in India range from ₹10 lakh for a small 0.5 TPH gas-fired packaged fire tube boiler to ₹5 crore and above for a 20–30 TPH water tube boiler. A common 5 TPH biomass FBC boiler typically costs ₹85 lakh – ₹1.2 crore. Price depends on capacity, fuel type, pressure, automation level, and whether pollution control equipment is included.
For small to medium textile plants (2–8 TPH, up to 15 kg/cm²) near biomass sources, a rice husk or coal-fired FBC boiler delivers the lowest fuel cost. For larger textile units (above 10 TPH, 15–25 kg/cm²), a bi-drum water tube boiler on coal or biomass is the standard choice. Gas-fired fire tube boilers are appropriate for urban textile plants with pipeline access where biomass is not practical.
IBR-mandated safety devices on all registered industrial boilers include: at least two independent safety valves set at or below maximum allowable working pressure, a steam pressure gauge, at least two independent water level indicators (gauge glasses), a low water level alarm and automatic burner trip, a feed check valve, a main steam stop valve, and a blow-off cock or blowdown valve. Modern boilers also include flame failure detection with automatic burner lockout as a standard protection.
A well-maintained industrial boiler with good feed water quality, regular tube cleaning, and annual IBR inspection typically lasts 15–25 years. Premature failure is almost always caused by: poor feed water quality leading to scale and corrosion (the most common cause), deferred maintenance, or operating above rated capacity. The boiler shell and drums can last 25+ years; tubes and burner components require periodic replacement as wear items.
A packaged boiler is a fire tube steam boiler that is factory-assembled, mounted on a base frame, and shipped to site as a complete unit requiring only connection of fuel, water, steam, and electrical services. Packaged boilers commission in days rather than weeks, require minimal civil foundation work, and are ideal for plants needing quick, reliable steam supply from 0.5–10 TPH at low to medium pressure. They are the most common boiler type for food, dairy, pharmaceutical, and commercial building applications.
A waste heat recovery boiler captures thermal energy from hot industrial exhaust gases from DG sets, cement kilns, glass furnaces, gas turbines, or process reactors and generates steam without burning any additional fuel. The exhaust gas is the energy source. WHRBs provide free steam from energy that would otherwise be vented as waste, delivering payback periods of 10–24 months in most Indian industrial applications.
A steam boiler heats water to saturation temperature and converts it to pressurised steam the primary output is steam for process heating, sterilisation, turbine drives, or manufacturing operations. A hot water boiler heats water and circulates it as pressurised hot water (typically 80–120°C) through a closed distribution loop for space heating, domestic hot water, pool heating, and hotel/hospital utility applications. Hot water boilers do not produce steam — the output remains liquid water throughout the circuit.
Gas-fired fire tube packaged boilers (1–5 TPH, 10–14 kg/cm²) with clean steam generators or clean steam filters are the standard specification for pharmaceutical manufacturing. The gas firing produces no ash and minimal emissions, the packaged design is compact and quick to commission, and clean steam quality for sterilisation meets GMP requirements. Electric boilers are used for dedicated clean steam supply where zero combustion product contamination is critical.
CPCB requires particulate matter (PM) emission control for all solid fuel industrial boilers. The standard configuration for 3–15 TPH solid fuel boilers is a multi-cyclone pre-separator (captures coarse fly ash) followed by a pulse jet bag filter (captures fine PM to meet CPCB consent condition outlet limits). Larger boilers may use an electrostatic precipitator (ESP) instead of or in addition to a bag filter. For high-sulfur fuels, a wet scrubber may additionally be required for SO₂ control.
Feed water quality is the most important operational parameter for long-term boiler reliability. Water with high hardness (dissolved calcium and magnesium) forms scale on heat transfer surfaces just 1 mm of scale increases fuel consumption by 8–10% and can cause localised tube overheating that leads to tube failure. Dissolved oxygen causes pitting corrosion of drum and tube internal surfaces. Feed water must be treated through softening, deaeration, and chemical dosing to maintain the quality parameters specified in IBR and boiler manufacturer guidelines.
Par Boiler Pvt. Ltd. (Par Techno-Heat), Thermax, Forbes Marshall, Cheema Boilers, and ISGEC are among the most trusted. Par Boiler specifically offers the complete product range fire tube, water tube, biomass FBC, thermic fluid heaters, waste heat recovery boilers, hot air generators, and air pollution control equipment from a single source with 25+ years of manufacturing experience from Ahmedabad and national after-sales service coverage.
Par Techno-Heat Pvt. Ltd. (PAR Boiler) manufactures the complete range of industrial boilers fire tube, water tube, biomass FBC, thermic fluid heaters, waste heat recovery boilers, and hot air generators for textile, food, pharmaceutical, chemical, rice mill, and power applications across India.
A 20-minute technical discussion covers your steam requirement, operating pressure, fuel access, and the boiler type that best fits your application and budget.
