Method and device for preparing water gas by using wastewater and gasification of partial semi-coke powder

Abstract

The invention discloses a method and a device for preparing water gas by using wastewater and gasification of partial semi-coke powder. The device is characterized in that: the outlet of a heating lift pipe is communicated with the lower inlet of a No. I cyclone separator; the upper outlet of the No. I cyclone separator is communicated with the lower inlet of a waste heat boiler, and the side wall outlet of the No. I cyclone separator is communicated with one inlet of the side wall of a gasification pipe of an airflow part; the side wall outlet of the waste heat boiler is communicated with the bottom inlet of the gasification pipe of the airflow part; the top outlet of the gasification pipe of the airflow part is communicated with the bottom inlet of a No. II cyclone separator; the top outlet of the No. II cyclone separator is communicated with the inlet of a crude gas purification device, and the side wall outlet of the No. II cyclone separator is communicated with the top inlet of awater vapor generator; the top outlet of the water vapor generator is communicated with the bottom inlet of the gasification pipe of the airflow part; and the bottom outlet of the water vapor generator is communicated with the side wall inlet of the heating lift pipe. The method for preparing the water gas consists of heating semi-coke powder, preparing water vapor by using waste water and preparing the water gas by using the partial semi-coke powder.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a method for preparing water gas by gasifying waste water and part of semi-coke powder and special equipment thereof. Background technique [0002] With the rapid development of my country's national economy, the industry of producing coke powder by pyrolysis of coal as raw material has also been developed accordingly. Coke powder is an important chemical raw material and clean fuel, mainly used in the production of synthetic gas to produce synthetic ammonia and methanol, as a high-temperature injection material for ironmaking, as a raw material for producing metal magnesium, as a clean fuel for power generation, industrial boilers and civil fuel. my country's current output of coke powder has reached 26 million tons. With the rapid development of the national economy, it is expected to reach 50 million tons by 2015. [0003] Water gas is the raw mate...

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Problems solved by technology

Most of the traditional water gas manufacturing methods use fixed-bed gas-making furnaces, using high-quality anthracite lump coal or coke as raw materials. Although my country is a country with rich coal resources, the output of high-quality anthracite suitable for fixed-bed gas-making furnaces is relatively small. In addition, the price of high-quality anthracite lump coal has been rising continuously in recent years, resulting in the cost increase of more than 600 small and medium-sized nitrogen fertilizer plants in my country, and the enterprises are almost in total losses. resulting in the inability of the entire system to produce

[0004] There are many methods for preparing water gas, such as GSP gasification method, Texaco coal water slurry gasification method, Lurgi (Luqi) gasification method, Shell (Shell) gasification method, Tsinghua non-slag-slag classification Gasification methods, etc., but they are all coal gasification, high conversion rate, but large investment, use of oxygen and desalted water in the gasification process, which increases the operating cost

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