Recovery device and recovery method for waste heat of raw coke oven gas of coking plant

A waste heat recovery device and waste heat recovery technology, which are applied in the discharge device of dry distillation gas, the steam generation method using heat carrier, the steam generation method, etc., can solve the problems of small demand, rupture of the inner wall of the riser, and limited application occasions. , to achieve the effect of huge cost, low cost and simple structure

Inactive Publication Date: 2017-09-08
李金山
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, there are still some insurmountable technical problems in the existing waste heat recovery method. For example, due to the high temperature of the raw gas, the temperature of the heat exchange medium is high, and a certain pressure will be generated. Since the rising pipe is connected with the carbonization chamber, When the heat exchanger cannot withstand the pressure of the heat exchange medium, it will cause leakage of the heat exchange medium, and the leaked heat exchange medium will easily enter the carbonization chamber; if the pressure of the heat exchange medium is too high, it may cause the inner wall of the riser to rupture, The heat exchange medium will enter the carbonization chamber from the riser pipe, which will directly affect the coking process, and even cause production accidents in severe cases
At the same time, the existing methods can only generate low-pressure steam (P≤2.5Mpa, T≤400°C) through heat exchange, and the demand for this low-pressure steam in actual industrial production is small, and the occasions where it can be applied are also limited

Method used

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  • Recovery device and recovery method for waste heat of raw coke oven gas of coking plant
  • Recovery device and recovery method for waste heat of raw coke oven gas of coking plant
  • Recovery device and recovery method for waste heat of raw coke oven gas of coking plant

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Embodiment 1

[0060] Please refer to figure 1 , figure 2 as well as image 3 , a coking plant raw gas waste heat recovery device provided in an embodiment of the present invention includes a heat conduction device 1 and a steam device 2;

[0061] Wherein, the heat conduction device 1 includes heat conduction pipes 101, heat conduction pipes 102, heat conduction pipes 103, heat conduction pipes 104, and heat conduction pipes 105, etc., which are arranged in parallel;

[0062] The steam device 2 includes a water pipe 201, a steam pipe 202 and a steam drum 203;

[0063] Wherein, the heat pipe 101 has a spiral structure and is connected with the steam pipe 202 .

[0064] Further, the heat pipe 101 is a hollow structure, and further includes a pipe wall and a liquid-absorbing core, and the absorbent core is provided with metal sodium as a heat transfer working medium.

[0065] Please refer to Figure 4 as well as Figure 5 , in the coking plant raw gas waste heat recovery device of the pr...

Embodiment 2

[0068] Please refer to figure 1 , figure 2 , image 3 , Figure 4 as well as Figure 5 A method for recovering waste heat from raw gas in a coking plant provided by an embodiment of the present invention includes the following steps:

[0069] Raw coal gas is introduced from the lower part of the riser 3, the heat receiving section of the heat transfer pipe 101 absorbs heat in the riser 3, the metal sodium working fluid in the heat transfer pipe 101 gradually melts, and forms sodium vapor in the steam channel area at the center of the heat transfer pipe 101 , as the evaporation continues, after the accumulation of steam in the central area of ​​the evaporation section reaches a certain amount, a continuous flow of steam is gradually established; The end of the heat release section makes all sections of the heat pipe 101 reach the state of continuous steam flow, and the heat pipe 101 enters the working state. With the passage of time and the continuous transfer of heat, the...

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Abstract

The invention provides a coking plant raw gas waste heat recovery device and a coking plant raw gas waste heat recovery method. In the device of the present invention, the heat in the rising pipe is transferred to the steam device arranged at a certain distance by using the heat conduction pipe, so that excessive pressure at the rising pipe during the heat conduction process can be avoided, and the structure is simple and the operation is safe. Etc. At the same time, in the method of the present invention, the device of the present invention is used to recycle the waste heat, which has the advantages of simple and safe method.

Description

technical field [0001] The invention relates to the field of secondary recovery and utilization of metallurgical processes, in particular to a device for recovering waste heat from raw gas in a coking plant and a method for recovering waste heat from raw gas in a coking plant. Background technique [0002] Raw coal gas is the gas produced during the coking process of coal. With the progress of coking, raw coal gas flows out from the carbonization chamber through the riser pipe, and the temperature can be as high as 650-850°C. This part of the heat can account for about 36% of the total heat of the coke oven. . The waste heat recovery of raw gas is of great significance for energy saving and emission reduction. It is not only an effective way to improve resource utilization in coking plants, but also a need to improve the environment and green production. [0003] At present, for the research on waste heat recovery of raw gas in coking plants, the existing method is mainly t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B1/18C10B27/00
CPCY02P20/129F22B1/1892C10B27/00
Inventor 王存贵李金山
Owner 李金山
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