Equipment and method for recycling raw coke oven gas waste heat for benzene removal and ammonia distillation

A technology for waste gas and debenzene removal, applied in the field of debenzene removal and ammonia distillation, can solve the problems of increasing the difficulty and cost of coking plant wastewater treatment, inefficient heat supply energy, inability to debenzene regeneration process, etc., to reduce purchase costs and The effect of using cost, reducing energy consumption and avoiding emissions

Active Publication Date: 2018-06-12
济南冶金化工设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has not been considered that steam as a heating medium for coking production and recovery will generate a large amount of wastewater, which will increase the difficulty and cost of wastewater treatment in

Method used

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  • Equipment and method for recycling raw coke oven gas waste heat for benzene removal and ammonia distillation
  • Equipment and method for recycling raw coke oven gas waste heat for benzene removal and ammonia distillation

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Embodiment approach

[0043] as attached figure 1 , figure 2 As shown, a device for recovering coke oven waste gas waste heat for debenzene removal and ammonia distillation, including riser heat exchanger 1, ammonia distillation reboiler 2, negative pressure ammonia distillation tower 3, benzene removal reboiler 4, Negative pressure debenzene tower 5, heat medium tank 6, heat lean oil tank 9, valves 11-20 and pipeline 21 forming a closed loop.

[0044] The riser heat exchanger 1 includes a heat medium inlet and outlet pipe 121 on the outside and a raw gas inlet and outlet pipe 122 in the middle. The heat medium inlet 123 of the heat medium inlet and outlet pipe 121 is in the upper part, the heat medium outlet 124 is in the lower part, and the heat medium inlet and outlet 124 are in the lower part. 123. The heat medium outlets 124 are respectively connected to the external pipes through respective flanges. The heat medium inlet and outlet pipes 121 are provided with heat medium. The raw gas inlet ...

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Abstract

The invention discloses equipment and method for recycling raw coke oven gas waste heat for benzene removal and ammonia distillation. The equipment comprises riser heat exchangers, an ammonia distilling reboiler, a negative pressure ammonia distilling tower, a benzene removal reboiler, a negative pressure benzene removal tower, a heat medium tank and a hot lean oil tank, wherein heat medium outlets of the riser heat exchangers are connected with the ammonia distilling reboiler, and the heat medium outlets are connected with the benzene removal reboiler; the benzene removal reboiler is connected with the heat medium outlets, a pipeline is connected with the negative pressure benzene removal tower, and the benzene removal reboiler is connected with the hot lean oil tank; the benzene removalreboiler is connected with the heat medium tank, the ammonia distilling reboiler is connected with the hot lean oil tank and the heat medium tank, the ammonia distilling reboiler is connected with thenegative pressure ammonia distilling tower, and the negative pressure ammonia distilling tower is connected with the ammonia distilling reboiler; the negative pressure benzene removal tower is connected with the hot lean oil tank, the hot lean oil tank is connected with a hot lean oil circulating pump, and the the hot lean oil circulating pump is connected with the benzene removal reboiler and the riser heat exchangers; and another pipeline is connected with an outlet of a heat medium pump, and the heat medium pump is connected with the heat medium tank.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery and utilization of coke oven rising pipe raw gas, in particular to a method and equipment for recovering waste heat of coke oven raw gas by using thermal fluid for removing benzene and distilling ammonia. Background technique [0002] The average temperature of the raw gas in the riser of the coke oven is about 700°C, and the heat produced is equivalent to about 35% of the heat consumed by coking. In direct contact with the raw gas, the raw gas is rapidly cooled to 80-83°C and sent to the subsequent gas refining system by vaporizing a large amount of circulating ammonia. The heat of the raw coal gas in the above process is converted into useless low-temperature water vapor (~82°C), which consumes a large amount of circulating water and low-temperature water to cool the raw coal gas, which is an obviously high energy-consuming and low-efficiency production process. [0003] A large num...

Claims

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Application Information

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IPC IPC(8): F27D17/00C10B27/00
CPCF27D17/004C10B27/00Y02P20/129Y02P10/25
Inventor 汤志刚王光华王登富姜爱国陈善龙李桂花孙兆俊王斌
Owner 济南冶金化工设备有限公司
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