Low-rank coal gradation usage poly-generation system and method

A low-rank coal, polygeneration technology, applied in the production of combustible gas, chemical modification of combustible gas, treatment of hydrocarbon oil, etc., to achieve the effect of rich product variety

Inactive Publication Date: 2015-12-16
SHANGHAI BOILER WORKS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high-efficiency and comprehensive utilization of low-rank coal, and at the same time produce a variety of products with high economic value. Efficient and clean conversion to achieve the goal of polygeneration

Method used

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  • Low-rank coal gradation usage poly-generation system and method

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Embodiment 1

[0041] It is equipped with a dry powder pressurized entrained entrained gasifier with a daily coal processing capacity of 2,000 tons, and the pyrolysis and carbonization system of the present invention is used for pretreatment. The basic data of raw coal coal quality analysis are shown in Table 1.

[0042] Table 1 Analysis data of raw material lignite coal quality

[0043]

[0044] It can be seen from Table 1 that the coal type is high-moisture lignite, which is a typical low-rank coal. In order to meet the demand for 2,000 tons / day fluidized bed gasification coal, the pyrolysis and carbonization process requires pretreatment. The raw coal equivalent can be obtained according to the pyrolysis and carbonization process (operating temperature 450°C) as follows:

[0045] Tar yield: ~5%wt

[0046] Raw gas output (dry gas): ~60000Nm 3 / h

[0047] Dehydration rate: 98%

[0048] Total raw coal consumption: ~60,000 tons / day.

[0049] The amount of semi-coke entering the entra...

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Abstract

The invention discloses a low-rank coal gradation usage poly-generation system and a method thereof. The low-rank coal gradation usage poly-generation system comprises a feed coal pyrolysis carbonization system and an entrained bed dry powder gasification system, wherein in the pyrolysis carbonization system, high water/high ash low-rank coal is subjected to pyrolysis and carbonization treatment, so as to obtain crude gas, tar and semi-coke; an oil product is obtained through coal tar hydrogenation; crude gas is purified to obtain coal gas; semi-coke is fed into an entrained bed for gasification; dry powder feeding is adopted during entrained bed gasification; semi-coke is grinded and fed in a powder form; after gasification, a synthesis gas is purified and changed to obtain hydrogen needed during coal tar hydrogenation and a synthesis gas needed during chemical synthesis. The low-rank coal gradation usage poly-generation system and the method thereof have the characteristics of stable and reliable operation, easy large-scale amplification, environmental protection, energy conservation, and the like.

Description

technical field [0001] The invention relates to a low-rank coal graded utilization polygeneration system and method, and belongs to the technical field of energy clean utilization. Background technique [0002] Low-rank coal mainly has the material characteristics of high moisture or high volatile content, so the calorific value of low-rank coal is low. The typical coal type is lignite. For example, the reserves in Southwest China and Inner Mongolia are relatively rich, and the total amount accounts for 10% of the country's proven reserves. above 50. my country is rich in coal and lacks oil and gas. How to efficiently utilize low-rank coal has become a major issue in today's clean coal technology. Whether it is combustion power generation or modern coal chemical utilization, the comprehensive utilization efficiency is extremely low because of its three characteristics of high water, high ash and low calorific value, and because of high ash and high moisture, conventional te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/00C10G67/02C10J3/46C10J3/84C10K3/00
Inventor 倪建军池国镇
Owner SHANGHAI BOILER WORKS
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