Product Description
Coal Gasifier is a production equipment that converts coal into combustible gas - coal gas (mainly composed of CO, H2, CH4, etc.). According to different gas production processes and the quality of the produced coal gas, gasifiers are divided into single-stage coal gasifiers, double-stage coal gasifiers and dry distillation coal gasifiers. It consists of a mechanical feeding system, a coal gas generation system, a steam generation system, and a slag breaking and unloading system. It has a simple structure, strong safety, and convenient operation. The coal gas produced is mixed semi-water gas with high calorific value. It is integrated with various industrial kilns and furnaces to make full use of the waste heat of coal gas and save energy and reduce consumption.
Gasifiers are divided into single-stage gasifiers, double-stage gasifiers and dry distillation gasifiers according to different gas production processes and the quality of the gas produced.
The product of the single-stage gasifier belongs to a thermal processing process of solid fuel (coal or coke) through gas, that is, oxygen or oxygen compounds (steam, carbon dioxide) pass through a high-temperature solid fuel (coal, coke) layer, and the organic matter (air, water vapor) that plays an oxidizing role is called a gasifier, and the mixed gas containing hydrogen, carbon monoxide and methane is called coal gas.
Furnace structure: full water jacket structure, self-produced steam pressure is 294KPa, which can be directly introduced into the gasifier for use as a gasifier.
Coal feeding mechanism: mechanical coal feeding structure is adopted, which is simple to operate, easy to maintain and has good air tightness.
Ash cleaning mechanism: hydraulic transmission device is used for wet single-side ash removal. The furnace is evenly charged, slag removed and air distributed, easy to operate, easy to adjust and reliable in operation.
Atmospheric pressure fixed bed gasifier generally uses lump anthracite or bituminous coal and coke as raw materials, steam or a mixture of steam and air as gasification agent, and produces gasified gas with carbon monoxide and hydrogen as the main combustible components. The fuel layer in the gasifier is divided into 1-drying layer 2-pyrolysis layer 3-reduction layer 4-oxidation layer 5-ash layer.
The gas produced by the two-stage gasifier is divided into upper gas and lower gas. The upper gas first passes through the I-stage electric tar collector to remove heavy tar and dust. Its working temperature is between 90-150 degrees Celsius. Before entering the indirect cooler, the gas is cooled to about 35-45 degrees Celsius in the indirect cooler. The lower gas is dedusted by the cyclone dust collector, and the temperature after dedusting is about 450-550 degrees Celsius. Then it enters the waste heat exchanger, where it cools the gas and recovers the sensible heat of the gas, and the gas temperature drops to about 200-230 degrees Celsius; then it enters the air cooler for cooling, and the temperature drops to 35-45 degrees Celsius. The upper and lower gas that have been indirectly cooled enter the secondary electrostatic precipitator for deoiling and dust removal again. The cooled and purified gas is pressurized and transported through the gas pipeline for use.
The top gas that makes up the two-stage furnace accounts for about 40% of the total gas volume. It has a high calorific value (6700kJ/nm3), a low temperature (about 120ºC), and contains a large amount of tar. This tar is a low-temperature dry distillation product with good fluidity. It can be captured by an electrostatic precipitator as a chemical raw material and fuel. In the gasification stage, the hot semi-coke and the vaporizer undergo a series of chemical reactions such as reduction and oxidation to generate gas, which is called gasified gas.
The bottom gas that makes up the two-stage furnace accounts for about 60% of the total gas volume. Its calorific value is relatively low (6400kJ/nm3) and its temperature is relatively high (about 450ºC). Because the coal has sufficient low-temperature retorting time in the retorting section, the coal entering the gasification section has become semi-coke, so the generated gasified gas does not contain tar. Because it is close to the ash layer of the grate, it contains a small amount of fly ash. The bottom gas can be treated by cyclone dust collectors and air coolers. In this way, users who use cold purified gas can use cold purified gas without using water washing, thus avoiding the defect that a large amount of phenol water cannot be treated.
Product principle
Producer gas is generated by mixing water vapor and air to form a gasifying agent and then flowing through a hot fixed combustion bed. The oxygen and water vapor contained in the air react with the carbon in the fuel to generate a producer gas containing CO, CO2, H2, CH4, N2 and other components. The steam mixed with air improves the thermal efficiency and reduces the temperature of the combustion bed, thereby controlling the formation of molten blocks.
Working principle of gasifier
The reaction between steam and carbon is an endothermic reaction: C+H2O=CO+H2-Q (Q is heat, the same below) When oxygen and carbon react, heat is released: 2C+O2=2CO+Q The temperature of the combustion bed depends on the saturation temperature of the gasifying agent, the particle size and type of the fuel and the furnace type of the generator. The temperature of the combustion bed is very important because it determines the composition of the producer gas for a given fuel and furnace type: a large amount of combustible gas can be produced at high temperatures.
Therefore, it is important to keep the combustion bed high without forming molten blocks. The temperature for forming the molten mass depends on the slag melting characteristics of the fuel. In the case of sufficient oxygen, two reactions will also occur: 2CO+O2=2CO2+QC+O2=CO2+Q.
Therefore, the generation of CO does not necessarily mean that any carbon combustion can reduce the calorific value of the coal gas. In addition, some water vapor also reacts with CO. Since each volume of CO is converted into CO2, the same volume of H2 is generated at the same time: CO+H2O=CO2+H2. Therefore, there will be no heat loss. In the reduction layer, when the temperature is lower than 1200ºC, the following rapid reactions will also occur: CO2+C=2CO, H2O+C=CO+H2. When the coal gas passes through the reduction zone, the combustible gas content rises rapidly, while the CO2 and water vapor content decreases.
After passing through the reduction zone, some coal gas is extracted and flows through the bottom cyclone dust collector and forced air cooler. This coal gas is called "bottom coal gas" and its temperature is about 400ºC. In the distillation layer, the fuel fed into the generator is dried, preheated and carbonized in sequence, and the generated steam, tar mist and coal gas leave the generator from the top together. This part of the coal gas is called "top gas" and its temperature is maintained at around 120°C.
Product application
Coal Gas generators are widely used in many industries, including metallurgy, building materials, machinery, chemicals, refractory materials, ceramics and other industries. Specific applications are as follows: Metallurgical industry: Gasifiers are used in themetallurgical industry for heating, firing, annealing and other processes to provide the required heat energy Building materials industry: In the building materials industry, gasifiers are used for drying, heat treatment and other processes to meet the heat energy needs in the production process Mechanical industry: In the mechanical industry, gasifiers are used for various heat treatment processes, such as melting and tunnel, push plate, downdraft and other kilns Chemical industry: In the chemical industry, gasifiers can be used for heating and catalytic processes of various chemical reactions Refractory industry: In the refractory industry, gasifiers provide a high temperature environment for the firing and processing of refractory materials Ceramic industry: In the ceramic industry, gasifiers are used for the firing and drying process of ceramics to ensure product quality In addition, gasifiers can also be used for the preparation of synthesis gas in small and medium-sized synthetic ammonia plants.
Product Parameters
| SINGLE STAGE COAL GASIFIER SPECFICATION |
| Type |
XYQ1.5 |
XYQ2.0 |
XYQ2.4 |
XYQ2.6 |
XYQ3.0 |
XYQ3.2 |
XYQ3.4 |
XYQ3.6 |
XYQ4.0 |
| I.D. of chamber (mm) |
1500 |
2000 |
2400 |
2600 |
3000 |
3200 |
3400 |
3600 |
4000 |
| Gasification area |
1.77 |
3.14 |
4.52 |
5.31 |
7.07 |
8.04 |
9.07 |
10.17 |
12.56 |
| Coal layer(mm) |
1000 |
1000 |
1000 |
1000 |
1000 |
1000 |
1000 |
1000 |
1000 |
| Oxidizing layer (mm) |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
| Ash layer (mm) |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
100~300 |
| Applicable coal |
Non-caking or Weak-caking Bituminous,Anthracite coal |
| Coal size (mm) |
20~40,25~50,30~60,40~80,50~100 |
| Coal consumption (kg/h) |
Lower limit |
389 |
691 |
995 |
1167 |
1554 |
1768 |
1996 |
2238 |
2763 |
| Upper limit |
495 |
879 |
1266 |
1486 |
1978 |
2251 |
2541 |
2849 |
3517 |
| Gasifying agent |
Air+Steam |
| Air consumption(m³/kg) |
2.2~2.8(Based on the carbon content of coal) |
| Steam consumption(kg) |
0.3~0.5(Based on the carbon content of coal) |
| Gas output(Nm³/h) |
Lower limit |
1166 |
2072 |
2984 |
3502 |
4663 |
5305 |
5989 |
6715 |
8290 |
| Upper limit |
1484 |
2638 |
3798 |
4458 |
5935 |
6752 |
7623 |
8546 |
10550 |
| Net heating value (KJ/Nm³) |
5020~6060 |
5020~6060 |
5020~6060 |
5020~6060 |
5020~6060 |
5020~6060 |
5020~6060 |
5020~ 6060 |
5020~ 6060 |
| Gas pressure(Pa) |
<980 |
<980 |
<980 |
<1500 |
<1500 |
<1500 |
<1500 |
<1500 |
<1500 |
| Gas temperature(ºC) |
400~550 |
400~550 |
400~550 |
400~550 |
400~550 |
400~550 |
400~550 |
400~550 |
400~550 |
| Max. blast pressure(Pa) |
3000 |
3000 |
3000 |
3000 |
4000 |
4000 |
4000 |
4000 |
4000 |
| Saturated temperature(ºC) |
50~65 |
| Poking hole steam seal pressure(KPa) |
<250 |
<250 |
<250 |
<250 |
<250 |
<250 |
<250 |
<250 |
<250 |
| Steam products(kg/h) |
250~300 |
300~350 |
450~500 |
500~550 |
500~600 |
550~650 |
600~700 |
600~700 |
600~700 |
| Inner steam pressure(KPa) |
<250 |
<250 |
<250 |
<250 |
<250 |
<250 |
<250 |
<250 |
<250 |
| Ash tray speed(r/h) |
2.76 |
2.23 |
2 |
1.7 |
1.7 |
1.7 |
1.7 |
1.7 |
1.7 |
| Ash tray driving power(kw) |
2.2 |
3 |
3 |
3 |
5.5 |
11 |
11 |
11 |
15 |
| Coal hoister motor power(kw) |
1.5 |
1.5 |
1.5 |
1.5 |
2.2 |
2.2 |
2.2 |
2.2 |
2.2 |
| Discharging ash mode |
Automatically wet discharging ash |
Comapny profile:
xuye Machinery is a comprehensive enterprise that comprises R& D, test, manufacture, sales and service functions. We have succeeded in researching and supplying solutions with the following equipment:Coal gasifier, Drying equipment, activated carbon production equipment,Environmental protection equipment and other products.The activated carbon regeneration equipment produced by our factory is divided into granular activated carbon regeneration equipment, powdered activated carbon regeneration equipment, hazardous waste activated carbon regeneration equipment, and solid waste activated carbon regeneration equipment, which can be customized according to the user's situation.
With our leading-edge technologies, advanced processing equipment and our corporate spirit of "innovation, pragmatism, unity, hard work and dedication", our company has the strength to meet the challenges from all aspects. We have the confidence to build "Baoyuan" into a world-renowned brand, provide quality services for the dryer and building processing industry, and achieve a win-win situation between the company and customers.
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