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Compound technique for producing coal gas by utilizing high-temperature excess heat and high-temperature CO2 waste gas

A coal gasification, high temperature technology, applied in the direction of granular/powder fuel gasification, waste heat treatment, cement production, etc., can solve the problems of high cost, waste of CO2 effective resources, etc., and achieve huge economic and social benefits.

Inactive Publication Date: 2011-08-17
张成顺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Anyway to remove C0 2 All need to invest a lot of cost, and waste C0 in vain 2 effective resources

Method used

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  • Compound technique for producing coal gas by utilizing high-temperature excess heat and high-temperature CO2 waste gas
  • Compound technique for producing coal gas by utilizing high-temperature excess heat and high-temperature CO2 waste gas

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Embodiment Construction

[0016] Concrete steps of the present invention are:

[0017] a. The tail gas of the rotary kiln merges with the tertiary air for combustion in the cement production process, passes through the temperature regulator, and then merges with the raw meal after multi-stage preheating in the pipeline, and enters the C4 cylinder of the cyclone preheater together; The temperature of the tail gas generated in the kiln is 1000℃~1100℃, the temperature of the tertiary air used for combustion in the cement production process is 650℃~800℃, and the temperature after the rotary kiln tail gas is combined with the tertiary air used for combustion in the cement production process is adjusted by the temperature regulator 850℃~860℃.

[0018] b. After preheating in the C4 cylinder of the cyclone preheater, the gas is discharged, or returned to the upper preheater, and the raw material enters the decomposition furnace; the temperature of the raw material out of the C4 cylinder is 750 ° C ~ 770 ° C, a...

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Abstract

The invention relates to a compound technique for producing coal gas by utilizing high-temperature excess heat and high-temperature CO2 waste gas, belonging to the field of environmental protection. The invention aims to effectively reutilize CO2 gas generated in the cement production process. The technique comprises steps as follows: rotary kiln tail gas and combustion-supporting tertiary air in the cement production process converge, pass through a temperature regulator, converge with the raw material subjected to multistage preheating in a pipeline, and together enter a cyclone preheater (C4 cylinder); after the mixture is preheated in the cyclone preheater (C4 cylinder), the gas is discharged or returns to the upper stage preheater, the raw material enters a decomposing furnace to be decomposed into CO2 and CaO, the CO2 and CaO are subjected to gas-solid separation in a cyclone dust collector (C5 cylinder), and the solid CaO of the cyclone dust collector (C5 cylinder) is sent into the rotary kiln; and the CO2 gas in the step d and O2 are mixed and enter a gasifier, the coal gas is stored, and waste residues are discharged. The invention can be used for directly preparing coal gas by utilizing industrial high-temperature excess heat and high-temperature CO2 waste gas so as to reduce the emission of carbon dioxide, and thus, has a practical meaning. Meanwhile, the invention can also be used for obtaining earnings due to emission reduction, and great economic benefits and social benefits brought about to enterprises by the preparation of coal gas at low cost.

Description

technical field [0001] The invention belongs to the field of environmental protection. Background technique [0002] For a long time, people have never stopped exploring the clean utilization of coal. At present, many scholars and research institutions have carried out extensive research on the near-zero emission technology of coal. There are two main ways to achieve it. One is based on traditional energy utilization. Increase the C0 of tail gas 2 The second is to build a new utilization system to remove CO in the utilization process 2 . Anyway to remove C0 2 All need to invest a lot of cost, and waste C0 in vain 2 effective resources. Contents of the invention [0003] The purpose of the invention is to effectively utilize the CO produced in the cement production process 2 Utilization of high-temperature waste heat and high-temperature CO for gas reuse 2 Waste gas and coal gasification co-production process. [0004] The steps of the present invention are: [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/43C10J3/46F27D17/00
CPCY02P20/129Y02P40/121
Inventor 张成顺白晓明
Owner 张成顺
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