Method for preparing natural gas by dry quenching co-production coal

A coal-to-natural gas and coke CDQ technology, which is applied in coke cooling, combustible gas production, coke oven, etc., can solve the problems of reducing the unit calorific value of pyrolysis gas, fuel consumption, air pollution, etc., and achieve simplified operation process and equipment maintenance, investment reduction, water saving effect
CN101747918AInactive Publication Date: 2010-06-23山西中元煤洁净技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
山西中元煤洁净技术有限公司
Publication Date
2010-06-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for preparing natural gas by dry quenching co-production coal. In the method, reducing gas is taken as heat-carrying gas, refrigerant and a pyrolytic process thereof are adopted to recover a great quantity of sensible heat of high-temperature coke so as to couple the dry-method coke quenching process and the coal pyrolytic process of high-temperature metallurgical coke, thus cancelling a gas and air supply system, a combustion control system and a waste gas discharging system in the original pyrolytic process, avoiding pyrolytic combustion process, saving a great quantity of energy, and realizing smoke-free, NOX-free, SOX-free and CO2-free discharging. Meanwhile, gasification gas produced by pyrolytic gas and semi-coke gasification is used for producing andsynthetizing natural gas in a methanation manner so as to realize clean conversion of coal. In addition, the method cancels N2 preparation equipment and waste heat boiler systems in dry quenching, thus simplifying the operation and maintenance process and greatly lowering investment and operation cost.
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Description

technical field

[0001] The invention relates to a coke cooling method in which cold coal and its pyrolysis process are used to absorb heat energy of high-temperature coke in the coking process, and a method for producing gasified coal gas by using hot semi-coke as a raw material, and using a mixture of gasification coal gas and pyrolysis coal gas to produce The natural gas method, specifically, is a method for dry quenching and co-production of coal to natural gas. Background technique

[0002] The "CDQ method and device" whose publication number is CN1694943A puts high-temperature coke from the top of the pre-chamber, blows cooling gas (mainly nitrogen) from the bottom of the pre-chamber, and cools the gas and high-temperature coke in countercurrent contact in the cooling chamber. exchange. The high-temperature gas after heat exchange is sent to the waste heat boiler after dust removal, and steam is generated through the waste heat boiler system to recover the heat energy ...

Claims

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