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Coke-oven single novel bridge pipe raw gas waste-heat recovery device

A waste heat recovery device and waste gas technology, which are applied in the heating of coke ovens, furnace safety devices, and dry distillation gas discharge devices, etc., can solve the problem that waste heat resources of waste gas cannot be fully recovered, the system is complicated, waste gas, and the influence of evaporator arrangement. and other problems, to achieve the effect of easy updating and maintenance, simple structure design, good economic and social benefits

Active Publication Date: 2012-12-12
SHANGHAI BAOSTEEL ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are mainly two modes of waste heat recovery of coke oven raw gas being studied: one is to use the riser device with waste heat recovery function, but due to its narrow space structure, the layout of the evaporator is affected, and the waste heat resources of raw gas cannot be fully recovered, resulting in Difficult to popularize; the second is to use the centralized extraction of raw coal gas and set up a centralized waste heat recovery system
Due to the complexity of the system, the flammability of raw gas, the precipitation and coking of tar, and other factors, this structural model has high requirements on the airtightness of the system, and the safe operation of the system is greatly challenged.

Method used

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  • Coke-oven single novel bridge pipe raw gas waste-heat recovery device
  • Coke-oven single novel bridge pipe raw gas waste-heat recovery device
  • Coke-oven single novel bridge pipe raw gas waste-heat recovery device

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Experimental program
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Effect test

Embodiment 1

[0038] See attached image 3 , the heat exchanger 7 of this embodiment is a double-layer annular arrangement, and the heat exchanger 7 is respectively provided with an inner layer heat exchanger 71 and an outer layer heat exchanger 72, and the inner layer heat exchanger 71 and the outer layer heat exchanger 72 are respectively Connected with the upper header 5 and the lower header 6, the inner layer heat exchanger 71 and the outer layer heat exchanger 72 are arranged in the middle of the descending section 4 of the bridge tube, and are not in contact with the tube wall. Therefore, the tube wall, the inner layer heat exchanger 71 and the outer layer heat exchanger 72 form three annular raw gas independent passages 44.

[0039] The ascending pipe 1, the ascending section of the bridge pipe 2, the transition section 3 of the bridge pipe and the descending section 4 of the bridge pipe are connected in sequence, the upper header 5 is connected with the steam drum 8 through a pipeli...

Embodiment 2

[0042] See attached Figure 4, the heat exchanger 7 of this embodiment is a plurality of pipes arranged side by side, and the heat exchanger 7 is 4 rows of overheating pipes 73 arranged in parallel. The overheating pipes 73 communicate with the upper header 5 and the lower header 6 respectively and are not connected to the pipe wall Contact, therefore, every two adjacent rows of overheating pipes 73, between the overheating pipes 73 and the pipe wall, a raw gas passage 45 is formed, and after the raw gas enters the bridge pipe descending section 4 from the bridge pipe transition section 3, the raw coal gas flows from the bridge pipe transition section 3 The raw gas passage 45 enters the bridge pipe raw gas outlet 11, and the raw gas fully exchanges heat with the desalted water in the overheating pipe 73 in the raw gas passage 45, and other steps are the same as in Embodiment 1 and will not be described again.

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Abstract

A coke-oven single novel bridge pipe raw gas waste-heat recovery device comprises a bridge pipe ascending section and a bridge pipe descending section. A bridge pipe transition section is arranged between the bridge pipe ascending section and the bridge pipe descending section, an evaporator is arranged in the bridge pipe descending section and connected with a steam pocket through a pipeline and is a multilayer evaporator with widened heating areas, a superheater is arranged in the bridge pipe transition section, and a raw gas passage of the bridge pipe descending section is divided through the evaporator into a plurality of independent passages used for circulating raw gas. The heating areas are increased, so that waste-heat recovery rate of the raw gas is increased; and modularized design is adopted, and deformation design is performed to a bridge pipe, so that surrounding processes are unaffected. Consequently, the coke-oven single novel bridge pipe raw gas waste-heat recovery device is simple in structural design, easy to maintain, convenient to wash and capable of effectively recovering the waste heat of the raw gas.

Description

technical field [0001] The invention relates to the technical field of recovery and utilization of industrial waste heat, and relates to a coke oven raw gas waste heat recovery device, in particular to a coke oven single new bridge tube waste gas waste heat recovery device. Background technique [0002] As a high-energy-consuming industry, the coking industry has attracted much attention. During the coking process of the coke oven, the temperature of the raw gas in the coke oven riser is as high as 750°C, which contains a large amount of sensible heat. In order to reduce the temperature of the raw gas in the coke oven and facilitate the subsequent coking process, the traditional process adopts the quenching process of spraying ammonia water to cool the high-temperature raw gas. The circulating ammonia is sprayed through the bridge pipe and the gas collection pipe to directly contact the raw gas, and the raw gas is rapidly cooled to 80-85°C by the large amount of gasification...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B27/00C10B41/08
CPCY02P20/129
Inventor 曹先常王芳
Owner SHANGHAI BAOSTEEL ENERGY TECH