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Technology for treating coking desulfurization waste liquid by raw gas residual heat

A technology for coking desulfurization waste liquid and waste heat treatment, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, coke oven, etc. The effect of high energy consumption

Active Publication Date: 2014-02-19
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there are many methods that can be applied to the treatment of desulfurization waste liquid, the widespread problems of high energy consumption, large investment, complicated operation, easy secondary pollution and poor product quality limit its wide-scale application.

Method used

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  • Technology for treating coking desulfurization waste liquid by raw gas residual heat

Examples

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Effect test

Embodiment 1

[0048] A process for treating coking desulfurization waste liquid with residual heat of raw coal gas. The desulfurization waste liquid is sent to the desulfurization waste liquid storage tank after being filtered. The filter adopts an open-bag filter, and the mesh number of the filter cloth is 100 mesh. The desulfurization waste liquid storage tank is pressurized and then enters the main desulfurization waste liquid transmission pipeline. The pressure in the total transmission pipeline is 0.7MPa. One hour after the completion of coal charging in the carbonization chamber, the desulfurization waste liquid in the main transmission pipeline starts to pass through the sub-pipelines And the injector is sent to the root of the rising pipe for spraying. The spraying conditions are as follows: the pressure is 0.31MPa, the temperature is 23°C, the flow rate is 68 L / h, and the spraying angle is 52°. At this time, the temperature of the injector sprayed into the high-temperature raw gas a...

Embodiment 2

[0050] A process for treating coking desulfurization waste liquid with residual heat of raw coal gas. The desulfurization waste liquid is sent to the desulfurization waste liquid storage tank after being filtered. The filter adopts an open-bag filter, and the mesh number of the filter cloth is 100 mesh. After the desulfurization waste liquid storage tank is pressurized, it enters the desulfurization waste liquid main conveying pipeline. The pipe and injector are sent to the root of the rising pipe for spraying. The spraying conditions are: pressure 0.55MPa, temperature 62°C, flow rate 92 L / h, spraying angle 52°. At this time, the temperature of the injector sprayed into the high-temperature raw gas area is maintained at about 578°C. After sampling and analysis, the NH in the treated desulfurization waste liquid 4 SCN, (NH 4 ) 2 S 2 o 3 and (NH 4 ) 2 SO 4 The contents were 0g / L, 1.77g / L and 2.35g / L respectively.

Embodiment 3

[0052] A process for treating coking desulfurization waste liquid with waste gas waste heat, adding 12% ammonia water to the desulfurization waste liquid, mixing evenly and then filtering, the desulfurization waste liquid is sent to the desulfurization waste liquid storage tank after filtration, and the filter adopts plate and frame type Filtering machine, the mesh number of the filter cloth is 80 mesh, and the desulfurization waste liquid is pressurized by a high-pressure pump, and then enters the main conveying pipeline of the desulfurized waste liquid. The pressure in the total conveying pipeline is 1.3 MPa. Start to send the desulfurization waste liquid in the main delivery pipeline to the top of the carbonization chamber through the sub-pipelines and injectors for spraying. The spraying conditions are: pressure 0.48MPa, temperature 57°C, flow rate 84 L / h, spraying angle 52 °. At this time, the temperature of the injector sprayed into the high-temperature raw gas area is m...

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Abstract

A technology for treating a coking desulfuration waste liquid by raw gas residual heat comprises the steps as follows: the pre-treated coking desulfuration waste liquid is sent to a coking desulfuration waste liquid storage tank and then is sent to a total coking desulfuration waste liquid conveying pipeline after pressurized; and during the coking process of a carbonizing chamber, the coking desulfuration waste liquid in the total conveying pipeline is sent to an ejector through a branch pipeline and ejected to a high-temperature raw gas area, so that the coking desulfuration waste liquid is vaporized and has a pyrolysis conversion reaction. With the adoption of the technology, the problems of high energy consumption, large investment, complicated operation, secondary pollution, poor product quality and the like generated when the desulfuration waste liquid is treated by adopting a conventional method are effectively solved; and compared with a conventional processing technique, the energy is saved by higher than 95%, and the conversion rate of substances such as sulforhodanide and the like in the desulfuration waste liquid is up to 99%.

Description

technical field [0001] The invention relates to a process for treating coking desulfurization waste liquid with waste heat of raw coal gas, in particular, a technical proposal for treating waste liquid desulfurization produced in a wet oxidation desulfurization process of a coking plant by utilizing the heat of raw coal gas of a coke oven. Background technique [0002] Coking coal contains 0.5% to 1.2% sulfur, of which 20% to 45% sulfur enters the raw coal gas in the form of sulfide to form H 2 S gas, with NH 3 Together with HCN, etc., it forms impurities in the gas. while H 2 Both S and HCN are toxic gases. Their existence will not only seriously endanger people's health and corrode equipment, but also the combustion products will pollute the environment; if used as synthesis gas, it will also cause catalyst poisoning; at the same time, various industrial furnaces and Flame cutters also have certain requirements for the sulfur content in coke oven gas, so coke oven gas m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C10B27/00
Inventor 张永发李国强景瑞军石玉良王琳王亚珍陈卫青
Owner TAIYUAN UNIV OF TECH
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