Method for keeping stable coke dry quenching gas circulation system after pipe explosion of heat pipe exchanger and device thereof

A technology of heat pipe heat exchanger and circulation system, which is applied in the field of coke dry quenching technology, can solve the problems of long order cycle and replacement time, failure of pipeline repair welding, rise of combustible gas, etc., to achieve convenient operation and ensure dry The effect of reducing the extinguishing rate and steam generation and reducing production loss

Inactive Publication Date: 2011-01-26
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat pipe heat exchanger is an important part of the entire CDQ gas circulation system. Once a pipe burst accident occurs, the water in the inner pipe of the heat pipe heat exchanger enters the entire CDQ system, causing the combustible gas in the circulating gas to continue to rise. High, serious will cause explosion, the entire CDQ system must be shut down for maintenance, and the internal pipe of the heat pipe heat exchanger has a small space and cannot be repaired and must be replaced. In addition, the order cycle of the equipment and the replacement requirements The time is longer and has a greater impact on production

Method used

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  • Method for keeping stable coke dry quenching gas circulation system after pipe explosion of heat pipe exchanger and device thereof
  • Method for keeping stable coke dry quenching gas circulation system after pipe explosion of heat pipe exchanger and device thereof
  • Method for keeping stable coke dry quenching gas circulation system after pipe explosion of heat pipe exchanger and device thereof

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Experimental program
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Effect test

Embodiment 1

[0018] This embodiment is a method for maintaining the stability of the CDQ gas circulation system after the heat pipe heat exchanger bursts, and it is carried out according to the following steps:

[0019] (1) Make a short connection between the water inlet pipe and the water outlet pipe of the heat pipe heat exchanger, connect a short connection water pipe, and set a valve on the short connection water pipe;

[0020] (2) After the heat pipe heat exchanger bursts, immediately open the valve on the short-circuit pipe, close the water inlet valve and the water outlet valve on the heat pipe heat exchanger inlet and outlet pipes, and cut off the heat pipe heat exchanger;

[0021] (3) Adjust the air volume of the circulating fan so that the pressure of the pre-stored section in the entire CDQ gas circulation system is stable at 30 Pa, and the circulating gas composition is reduced to the acceptable range of 2% hydrogen and 5% carbon monoxide. Only the circulating gas entering the C...

Embodiment 2

[0026] This embodiment is a method for maintaining the stability of the CDQ gas circulation system after the heat pipe heat exchanger bursts, and it is carried out according to the following steps:

[0027] (1) Make a short connection between the water inlet pipe and the water outlet pipe of the heat pipe heat exchanger, connect a short connection water pipe, and set a valve on the short connection water pipe;

[0028] (2) After the heat pipe heat exchanger bursts, immediately open the valve on the short-circuit pipe, close the water inlet valve and the water outlet valve on the heat pipe heat exchanger inlet and outlet pipes, and cut off the heat pipe heat exchanger;

[0029] (3) Adjust the air volume of the circulating fan so that the pressure of the pre-stored section in the entire CDQ gas circulation system is stable at 60 Pa, and the components of the circulating gas are reduced to the acceptable range of 1% hydrogen and 3% carbon monoxide, and only the circulating gas ent...

Embodiment 3

[0034] This embodiment is a method for maintaining the stability of the CDQ gas circulation system after the heat pipe heat exchanger bursts, and it is carried out according to the following steps:

[0035] (1) Make a short connection between the water inlet pipe and the water outlet pipe of the heat pipe heat exchanger, connect a short connection water pipe, and set a valve on the short connection water pipe;

[0036] (2) After the heat pipe heat exchanger bursts, immediately open the valve on the short-circuit pipe, close the water inlet valve and the water outlet valve on the heat pipe heat exchanger inlet and outlet pipes, and cut off the heat pipe heat exchanger;

[0037] (3) Adjust the air volume of the circulating fan to stabilize the pressure of the pre-stored section in the entire CDQ gas circulation system at 100 Pa, and reduce the circulating gas composition to the qualified range of 1% hydrogen and 2% carbon monoxide, and only the circulating gas entering the CDQ fu...

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Abstract

The invention relates to a relative technology of a coke dry quenching process and discloses a method for keeping a stable coke dry quenching gas circulation system after pipe explosion of a heat pipe exchanger and a device thereof. The device comprises the heat pipe exchanger. A water inlet pipe and a water outlet pipe are connected to the heat pipe exchanger, a water pipe is in short connection between the water inlet pipe of the heat pipe exchanger and the water outlet pipe of the heat pipe exchanger, and a valve is arranged on the short connected water pipe. After pipe explosion of the heat pipe exchanger occurs, the heat pipe exchanger is in short circuit through the short connected water pipe, and water of a pipeline in the heat pipe exchanger can be avoided entering the whole coke dry quenching gas circulation system, thereby recovering the coke dry quenching gas circulation system to be in a normal state, keeping the stable system, efficiently preventing an explosive accident from occuring and conveniently maintaining the heat pipe exchanger. The method has the advantages of convenient maintenance, convenient and suitable operation and ensures the dry quenching ratio and the steam productivity without delaying production.

Description

technical field [0001] The invention relates to the technology related to CDQ technology, in particular to a method and device for maintaining the stability of CDQ gas circulation system after a heat pipe heat exchanger explodes. Background technique [0002] CDQ system such as figure 1 As shown, it includes coke charging device, dry quenching furnace, primary dust collector, boiler, secondary dust collector, circulating fan, heat pipe heat exchanger and coke discharge device. The heat pipe heat exchanger plays two roles in the CDQ process: first, to further reduce the temperature of the circulating gas entering the CDQ furnace, which can reduce the temperature at the outlet of the circulating fan from 180°C to 130°C, thereby improving the cooling effect of coke , to reduce the circulation gas flow; second, to further utilize the heat of the circulation gas, thereby reducing all the steam in the deaerator. [0003] The heat pipe heat exchanger is connected as figure 2 As...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B39/02
Inventor 吴俊王立俊叶武
Owner NANJING IRON & STEEL CO LTD
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