Coal Fired Steam Boiler System

Rated steam output: 20-35ton/h
Rated working pressure: 1.25-2.5Mpa
Fuel type: anthracite coal, meagre coal, lignitous coal, bituminous coal

Application

The coal fired steam boiler system is a large industrial bulk boiler. Due to limitations of volume and transportation, we transport parts of the boiler in pieces and customers can assemble them on site. We can provide technicians to provide on-site installation and debugging services upon request.

The boiler is fueled by coal and it effectively heats the water within, evaporating it so that it can condense within a heat exchanger and the cycle continues. It can provide heat for manufacturing equipment or as generalized heating in large structures.

The steam boiler is widely used in industry, and its main applications include:

Food industry: The steam can be used for cleaning, and can be used for heating, drying or disinfecting food.
Spinning, printing and dyeing industry: used for some production links such as dyeing, rinsing, drying and shaping cloth.
Biological medicine industry: used for heating reaction kettles, condensation reaction, exchanging heat and disinfecting of chemical reaction systems.
Hospital: used for disinfecting, heating, and air conditioning.
Petrochemical Industry: used for heating oil and increasing liquidity.
Wood furniture industry: used for drying wood, brick and so on
Papermaking industry: high pressure steam is used to drive power generation. The steam after decompressing is used for drying, and the last low pressure steam is used for deinking or pulping and making paper.
Tobacco industry: provide heat for making silk and baking. Technical parameters:

Type	Rated steam output(ton/hr)	Rated steam pressure(MPa)	Rated steam temperature(℃)	Design thermal efficiency
SZL10	10	1.25/1.6/2.5/3.82	193/204/226/247	＞78%
SZL20	20
SZL25	25
SZL30	30
SZL40	40
SHL50	50
SHL65	65
SHL75	75

System composition

The industrial boiler is a natural circulation boiler which is divided into two parts. The upper part is a boiler heated surface, and under part is a grate. The economizer and air per-heater are set at the tail of the boiler. The boiler features a water circulation system, flue gas system, ash system and blowing system.

1. Boiler heated surface
The boiler heated surface consists of a steam drum, water drum, header, water wall and convection tube bundle. Water drum is equipped with sewage device.

2. Grate
The boiler uses chain grate and wind blows from the bottom. There are 6 independent wind chambers under the grate, which can be adjusted according to the user combustion conditions to save electricity.

3. Economizer
The economizer is placed at the tail of boiler, which is used to recover the residual heat of flue gas. When the temperature of exhaust gas is too high, the economizer can reduce the temperature and can save fuel.

4. Air per-heater
The air pre-heater can heat the air before entering the boiler and improve combustion efficiency.

5. Water circulation system
Water source—pump—economizer—drum—downcomer-- water drum-- riser tube-- steam drum-- steam outlet

6. Ash system
The fuel ash after burning is discharged by the slag extractor at the end of grate, ash not timely discharged will fall into front ash bucket with chain grate running. So users need to clean regularly.