Look for information about gas producer and heating furnace.

A, single-stage gas producer process description

1, furnace structure: full water jacket structure, self-produced steam pressure of 294KPa, which can be directly introduced into the gas furnace for use as gasification agent.

2. Coal feeder mechanism: mechanical coal feeder structure is adopted, which is simple to operate, convenient to maintain and good in air tightness.

3. Ash cleaning mechanism: adopt hydraulic transmission device for wet single-side ash cleaning. The furnace has the advantages of uniform charging, slag discharge and air distribution, simple operation, stable production, convenient adjustment and reliable operation.

4, atmospheric fixed bed gas producer, generally with block anthracite or bituminous coal and coke as raw materials, with steam or the mixture of steam and air as gasification agent, producing gasified gas with carbon monoxide and hydrogen as the main combustible components.

Division of fuel layer of gas furnace

1- dry layer 2- dry distillation layer 3- reduction layer 4- oxidation layer 5- ash layer

Figure 2- 1 Schematic diagram of fuel layer partition of gas producer

The gasification reaction of solid fuel is divided into five layers according to the characteristics of the production process in the gas furnace, as shown in Figure 2- 1: dry layer-at the top of the fuel layer, the fuel contacts with cold coal, and the water in the fuel is evaporated; Dry distillation layer-under the dry distillation layer, because the temperature conditions are similar to those of the dry distillation furnace, the fuel decomposes when it is cold, and the released volatile and other dry distillation products become coke, and the coke is transferred from the dry distillation layer to the gasification layer for cold chemical reaction; Gasification layer-the main area of gasification process of gas furnace, where carbon in fuel reacts violently with gasifying agent. In view of the different reaction conditions, the gasification layer can also be divided into oxidation layer and reduction layer.

(1) oxide layer: carbon is oxidized into carbon dioxide and carbon monoxide by oxygen in the gasifying agent, releasing a lot of cold energy. The cooling capacity required for the cold chemical reaction of gas is maintained by this. The temperature of oxide layer is generally maintained at1100 ~1250℃, which depends on the melting point of raw coal ash.

(2) Reduction layer: the reduction layer is the area where the main combustible gas is generated, and carbon dioxide reacts with the burnt carbon to generate combustible carbon monoxide; Water vapor reacts with the burning cold carbon to generate combustible carbon monoxide and hydrogen, while absorbing a lot of cold.

(3) Ash layer-the ash layer formed after the slag is gasified, which can precool and evenly distribute the gasifying agent entering from the bottom of the furnace, thus protecting the furnace bars and ash trays. The height of different areas in the fuel layer varies with the type and properties of the fuel, the gasification agent used and the gasification conditions. Moreover, there is no obvious boundary between layers, and they are often staggered.

Second, the basic principle of solid fuel gasification reaction

The fixed bed gas producer produces fuel gas. First, air passes through the fuel layer, and carbon reacts with oxygen to raise the temperature. Then, steam and air are mixed through the fuel layer, and carbon reacts with steam and oxygen to absorb and release cold energy and produce producer gas.

From the chemical reaction principle in gasification stage, it is hoped to form conditions conducive to steam decomposition and carbon dioxide reduction reaction, so it can be considered that it is beneficial to increase the thickness and temperature of gasification layer appropriately and reduce the flow rate of steam. In the chemical reaction between carbon and water vapor, measures such as increasing the thickness of gasification layer and reducing the gas flow rate can speed up the reaction, increase the content of carbon monoxide and improve the decomposition rate of water vapor.

Zibo Huaxin tong machinery equipment co., ltd

www.hxtgas.com

The two-stage gas producer has two gas outlets, which can output gas with different calorific values. The producer is a continuous gas producer. The air from the blower is mixed with the steam generated by the generator as a gasifying agent and enters the generator through the bottom of the generator. After screening, the bituminous coal with the particle size of 25-50 mm is lifted to the top bunker by the electric hoist, and evenly added into the producer through the roller coal feeder and coal separator. After the reaction, the top gas generated in the dry distillation section is charged into the intercooler through electric coke. The bottom gas generated in the gasification section enters the intercooler through the quencher, the upper and lower air are cooled, then the electric light oil is captured, and then it is sent to the user through the pressurizer. The calorific value of gas is higher and more stable than that of ordinary single-stage furnace. After the coal is completely dry distilled in the furnace, the gas in the lower section basically contains no tar, and the gas in the upper section contains a small amount of light tar, which is not easy to block the pipeline. High degree of automation and low labor intensity. The gas station does not pollute the environment, saves water significantly, occupies a small area and has low long-term operation cost.