Pressurized moving bed hydrocarbon-rich hydrogen gas and water gas graded production furnace

Abstract

Pressurized moving bed hydrocarbon-rich hydrogen gas and water gas graded production furnace, the raw coal is first gasified with hydrogen to produce hydrogen gas rich in methane and multi-carbon hydrocarbons, and then the residual coke left after the hydrogen gas is produced Water gas gasification, the hydrocarbon-rich hydrogen gas and water gas are released separately, the gasification agent and the gasified solid particles flow countercurrently, the heat is fully utilized, the energy conversion efficiency is high, the steam and oxygen consumption are small, and the carbon dioxide emission is small; the water gas condensate Relatively reduced, and does not contain phenolic compounds, low processing cost, environmentally friendly; high content of methane and multi-carbon hydrocarbons in hydrogen gas, low purification and separation costs; pressurized moving bed hydrocarbon-rich hydrogen gas and water gas graded production furnace, available Coal-to-natural gas, coal-to-fuel oil, coal-to-olefins, coal-to-methanol, IGCC integrated coal gasification combined cycle power generation and other industries.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a coal gasification process technology and equipment for producing natural gas and oil from coal. Background technique [0002] The current coal-to-oil and coal-to-natural gas, whether it is a two-step method of synthesizing oil and gas after coal gasification, or a one-step method of direct hydrogenation of coal to produce oil and gas, are all due to complex process routes and low energy conversion efficiency in the process , coal-to-oil is only 40%, consumption of standard coal is 3.6 tons / ton of oil, coal-to-natural gas is only 50%, consumption of standard coal is 2.5 tons / km 3 ; High equipment investment, coal-to-oil 160 billion yuan / 10 million tons, coal-to-natural gas 28 billion yuan / 4 billion m 3 ; Water resource consumption is high, coal-to-oil consumption is 7 tons / ton of oil, and coal-to-natural gas is 7 tons / km 3 ; Heavy environmental pollution, high...

AI Technical Summary

Problems solved by technology

[0005] The reasons for the low efficiency of the current one-step method of direct hydrogenation of coal are that the process pressure is as high as 20MPa and the investment in equipment is large; Heating can generate CO again; the third is to use entrained bed coal gasification to produce hydrogen. Since the hydrogen element in coal exists in the form of hydrocarbons in the process of entrained bed gasification, it will first be pyrolyzed into gaseous hydrocarbons below 700°C, and then it will be combined with the gas flow. O in 2 Gas reacts to produce CO 2 and H 2 O releases heat, making the furnace temperature as high as 1300-1700°C. Therefore, a considerable part of the blast furnace temperature of the entrained bed is contributed by the combustion of hydrogen, which leads to a low molar fraction of hydrogen in the gas, and a particularly high content of CO, while CO must be It can be converted into hydrogen after conversion, that is, this hydrogen production process is essentially to burn off the H in coal first. 2 , and then use the C element in the coal to produce CO, and the CO can be transformed into H 2 , so the current one-step direct hydrogenation of coal to produce C n h 2n+2 , there are also the aforementioned low energy conversion efficiency, heavy environmental pollution, high cost of sewage treatment, CO 2 Disadvantages of many emissions

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