Water gas production process of chemical products

Water gas is the gas produced by hot coke. The main components are carbon monoxide and hydrogen. After combustion, it will release water and carbon dioxide, as well as trace amounts of carbon monoxide, hydrocarbons and nitrogen oxides. The combustion speed is 7.5 times that of gasoline, and the anti-explosion performance is good. According to foreign research and patent reports, the compression ratio can reach 12.5. The thermal efficiency is increased by 20-40%, the power is increased by 15%, and the fuel consumption is reduced by 30%. The tail gas purification is close to Euro IV standard, and a small amount of platinum catalyst can also be used for purification. Compared with alcohol ether, it simplifies manufacturing, reduces equipment, and has lower cost and investment. Compression or liquefaction is similar to hydrogen, but it doesn't need to remove CO, so the investment in building a station is low. The reduced cost and investment can also be used to partially compensate the investment and cost of compression (alcohol ether should also be compressed) or liquefaction. Toxic, used industrially as fuel and chemical raw materials. Production method: Water vapor can be made into clean water gas (mainly composed of CO and H2) by passing through hot coal seam. The phenomenon is that the flame rises higher and becomes light blue (the burning color of hydrogen and CO). The chemical equation is C+H2O = = (high temperature) CO+H2. This is why wet coal burns more violently than dry coal. Gas plants often deliberately mix a small amount of odorous gas into household water gas, so that CO and H2 become colorless and odorless gases, which can be found in time when gas leaks. Methane and water can also be used to produce water gas. The chemical equation is CH4+H2O = = Co+3H2. Another environmentally friendly water gas producer is low calorific value gas. It is obtained by reacting steam with scorching anthracite or coke. The main components are hydrogen and carbon monoxide, but also contain a small amount of carbon dioxide, nitrogen and methane. The content of each component depends on the raw materials used and gasification conditions. Mainly used as raw materials for synthetic ammonia and liquid fuel, or as a supplementary source of industrial fuel gas. In industry, water gas production generally adopts intermittent periodic fixed bed production technology. The furnace structure adopts UGI gasifier. In the gasifier, the following water-gas reactions mainly occur between carbon and steam: C+H2O = (high temperature) Co+H2C+2H2O = (high temperature) CO2+2H2. All the above reactions are endothermic, so it is necessary to supply heat to the gasifier. Usually, air is first sent into the furnace to burn part of the fuel, and the heat is stored in the fuel layer and regenerator, and then steam is introduced into the hot fuel layer for reaction. Due to the endothermic reaction, when the temperature of the fuel layer and regenerator drops to a certain temperature, air is sent into the furnace again to raise the temperature, and so on. When the purpose is to produce fuel gas, in order to increase the calorific value of fuel gas, the temperature of exhaust gas is sometimes increased, so that oil is injected into hot gas to crack the oil, and the so-called heated water gas is obtained. Application: A kind of gas fuel. The main components are hydrogen and carbon monoxide. It is obtained by the action of steam and hot anthracite or coke. In industry, steam and air are alternately and intermittently injected, or steam and oxygen are continuously injected together. The calorific value is about 10500 kJ/ standard cubic meter. In addition, there is a kind of "semi-water gas", which is blown by steam and air together. It can be used as fuel, or as raw material for synthetic ammonia, petroleum, organic synthesis, hydrogen production, etc. In recent years, the technology of high temperature gas-cooled reactor is developing, which uses helium as heat carrier and transfers the heat of nuclear reaction to gasifier as heat source to produce water gas. However, there are many hidden dangers in water gas. After long-term operation, the water gas producer is prone to produce a large number of pollutants such as hydrogen sulfide, tar and phenol water, with an impact radius of 500 meters, which is very harmful to crops, air environment and human body. It produces all kinds of waste gas and stench, which will make people feel headache and dizziness, and residents simply can't stand it. In addition, because water gas is mainly composed of combustible gases such as carbon monoxide and hydrogen, once it leaks, it is very likely to explode and be poisoned, resulting in mass casualties. Hydrogen sulfide in water gas will be converted into sulfur dioxide and water after gas combustion. Therefore, there is sulfur dioxide in the tail gas of coal-fired boiler after combustion, which needs desulfurization treatment, but it is rarely used at present. Another: low calorific value gas. It is obtained by reacting steam with scorching anthracite or coke. The main components are hydrogen and carbon monoxide, but also contain a small amount of carbon dioxide, nitrogen and methane. The content of each component depends on the raw materials used and gasification conditions. Mainly used as raw materials for synthetic ammonia and liquid fuel synthesis, or as a supplementary source of industrial fuel gas. In industry, water gas production generally adopts intermittent periodic fixed bed production technology. The furnace structure adopts UGI gasifier. In the gasifier, the following water-gas reactions mainly occur between carbon and steam: C+H2O = (high temperature) Co+H2C+2H2O = (high temperature) CO2+2H2. All the above reactions are endothermic, so it is necessary to supply heat to the gasifier. Usually, air is first sent into the furnace to burn part of the fuel, and the heat is stored in the fuel layer and regenerator, and then steam is introduced into the hot fuel layer for reaction. Due to the endothermic reaction, when the temperature of the fuel layer and regenerator drops to a certain temperature, air is sent into the furnace again to raise the temperature, and so on. When the purpose is to produce fuel gas, in order to increase the calorific value of fuel gas, the temperature of exhaust gas is sometimes increased, so that oil is injected into hot gas to crack the oil, and the so-called heated water gas is obtained.