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Process for treating wastewater from pressure gasification of smashed coal on fixed bed

A crushed coal pressurized gasification and treatment process technology, applied in fixed bed gasification, gasification process, water/sewage treatment, etc., can solve problems such as weak treatment capacity, achieve simple process, obvious economic benefits, improve The effect of sewage treatment capacity

Active Publication Date: 2015-04-22
CHNA ENERGY INVESTMENT CORP LTD +1
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Problems solved by technology

[0003] The main purpose of the present invention is to provide a fixed-bed crushed coal pressurized gasification sewage treatment process to solve the problem of weak ability to process the sewage produced in the coal gasification production process in the prior art

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  • Process for treating wastewater from pressure gasification of smashed coal on fixed bed
  • Process for treating wastewater from pressure gasification of smashed coal on fixed bed

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[0015] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0016] Such as figure 1 As shown, according to an embodiment of the present invention, the fixed-bed pulverized coal pressurized gasification system includes a sewage pressurization and preheating unit and a sewage vaporization and superheating unit, such as figure 1 As shown in the dotted line box in the middle, the sewage pressurization and preheating unit and the sewage vaporization and superheating unit constitute the sewage treatment module of the present invention for processing the fixed bed pulverized coal pressurized gasification sewage generated in the pulverized coal pressurized gasification system. The sewage water inlet of the sewage pressurization and preheating unit is connected...

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Abstract

The invention provides a process for treating wastewater from pressure gasification of smashed coal on a fixed bed. The process comprises the following steps of feeding the pretreated wastewater from the pressure gasification of smashed coal on the fixed bed into a wastewater pressurizing and preheating unit, pressurizing the wastewater to a predetermined value in the wastewater pressurizing and preheating unit, feeding the pressurized wastewater into a gas preheater, preheating the wastewater, feeding the preheated wastewater into a wastewater gasifying and overheating unit, gasifying the wastewater into saturated wastewater steam in the wastewater gasifying and overheating unit, further heating the saturated wastewater steam into overheated wastewater steam, and feeding the overheated wastewater steam which replaces the traditional gasifying agent to serve as a new gasifying agent into a gasifying furnace. Through the technical scheme of the invention, the problem of weak capacity of treating the wastewater from the gasification of coal in the prior art is solved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a process method for treating sewage by pressurized gasification of crushed coal in a fixed bed. Background technique [0002] The current pressurized fixed bed coal gasification plants usually use biochemical methods to treat coal gasification wastewater. Due to the large amount of sewage in the coal gasification plant, and the water quality of the sewage varies with the characteristics of the raw coal (coal is composed of C, H, O, N, S and other elements, while the raw coal contains a higher proportion of N and S elements) Pollutants) and coal gasification production operating conditions have changed greatly, and the sewage produced by the coal gasification plant has strong destructive power to the environment. Therefore, the sewage treatment link is the weak link in the production process of the pressurized fixed bed coal gasification plant. The lagging development of sewage t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C10J3/04
CPCC02F1/048C02F9/00C10J3/04C10J2300/0953
Inventor 贺百廷任海君
Owner CHNA ENERGY INVESTMENT CORP LTD
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