gas generatorIt is a device that converts solid fuel (mainly coal) into combustible gas fuel in industrial production. Through the gasification process, the carbon in the coal reacts with air or oxygen to generate producer gas whose main components are carbon monoxide and hydrogen. This kind of gas can be used as fuel for combustion in industrial furnaces. It has the characteristics of stable combustion and moderate calorific value, and has been widely used in the industrial field.
The working principle of gas generator
The gasification process of the gasifier occurs in the furnace. Coal is added from the top of the furnace and reacts with the gasification agent (air, oxygen or water vapor) introduced from the bottom of the furnace in a high-temperature environment. According to the different reaction areas, it can be divided into drying layer, carbonization layer, reduction layer, oxidation layer and ash layer from top to bottom.
In the oxidation layer, carbon reacts violently with oxygen to form carbon dioxide, while releasing a large amount of heat; in the reduction layer, carbon dioxide reacts with carbon to form carbon monoxide, while water vapor reacts with carbon to form carbon monoxide and hydrogen. The generated gas is exported from the outlet on the side of the furnace body, and after dust removal and cooling, it is sent to the gas storage cabinet or directly to the user.
Main types of gas generators
According to the different gasification processes and equipment structures, gas generators can be divided into various types:
Fixed bed gas generator: The coal moves slowly from top to bottom in the furnace, and the gasification agent is introduced from the bottom. Typical representatives are two-stage gas generators and one-stage gas generators. This type of furnace has simple structure and stable operation, and is suitable for gasifying various types of coal.
Fluidized bed gas generator: Coal is suspended by the air flow in a fluidized state, and the gasification reaction proceeds in a suspended state. It is suitable for gasifying inferior coal and small particle size coal with high thermal efficiency.
entrained bed gas generator: Pulverized coal and gasifying agent are sprayed into the high-temperature reactor and rapidly gasified in a suspended state. Suitable for use in large gas stations with high gasification intensity.
Process characteristics of gas generator
As a gas generating device, the gas generator has the following process characteristics:
1. Wide fuel adaptability: Can gasify various coal types such as bituminous coal, anthracite, lignite, etc.
2. Gas has moderate calorific value: The calorific value of producer gas is generally 1200 to 1500 kcal/cubic meter.
3. Gasification efficiency is high: The carbon conversion rate of fixed bed gasifier can reach over 90%
4. Operation is relatively simple: The equipment structure is not too complex and the operation and maintenance are relatively simple.
5. Good environmental performance: Compared with direct coal burning, coal gasification combustion can reduce soot and sulfur dioxide emissions.
Application areas of gas generators
The generator gas produced by the gas generator is widely used in the following industrial fields:
- Heat treatment furnace: As fuel for various heat treatment furnaces, forging furnaces, and sintering furnaces
- Foundry industry: Fuel for cupola furnaces and batching furnaces used for smelting metals
- Building materials industry: Fuel for glass furnaces, cement kilns, and ceramic tunnel kilns
- Chemical industry: Used as chemical raw material gas to synthesize ammonia, methanol and other chemical products
- Drying industry: Fuel for various industrial product drying equipment
Use and maintenance of gas generator
In order to ensure the safe and stable operation of the gas generator, the following matters should be paid attention to during use:
- fuel quality: The coal entering the furnace should meet the particle size requirements, and the moisture content should not be too high to avoid affecting the gasification effect.
- Vaporizing agent ratio: Reasonably control the ratio of air and steam to prevent slagging or deterioration of gas quality.
- Furnace condition maintenance: Regularly clean the slag in the furnace to maintain good air permeability
- Security protection: Gas contains toxic components and should be equipped with complete carbon monoxide detection and ventilation facilities
- environmental protection: Equipped with dust removal and desulfurization devices to reduce pollutant emissions
We provide gas generator equipment of various specifications and can provide overall solutions from design, manufacturing to installation and commissioning according to your gas needs and site conditions. Welcome to call us for consultation.
