Method for preventing or reducing coking of inner wall of ascension pipe of coke oven

A tube inner wall and coke oven technology, which is applied in the fields of coal coking, energy conservation and environmental protection, to achieve the effects of reducing coking, ensuring heat exchange efficiency, and increasing production

Pending Publication Date: 2021-09-24
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In short, with the popularization of riser waste heat recovery and utilization technology, the problem of coking on the inner wall of the riser pipe has become more and more prominent. Whether the riser waste heat recovery and utilization process can achieve efficient and stable operation has become a difficult problem that has always plagued enterprises.

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  • Method for preventing or reducing coking of inner wall of ascension pipe of coke oven
  • Method for preventing or reducing coking of inner wall of ascension pipe of coke oven
  • Method for preventing or reducing coking of inner wall of ascension pipe of coke oven

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Embodiment 1

[0046] Such as figure 1 , figure 2 As shown, in this embodiment, in order to prevent or eliminate coking on the inner wall of the riser, an inclined inert gas inlet pipe 4 is arranged on the side of the upper end of the riser 2, and the high-pressure inert gas is passed from the upper end of the riser 2 to the inner wall of the riser. The tangential direction of 5 is supplied into the riser 2, so that the high-pressure inert gas forms a continuous airflow in the riser 2 along the inner wall 5 of the riser and moves downward at a high speed. Viscous components such as tar and the like precipitated by contact with the pipe inner wall 5 (externally installed riser waste heat recovery device 3) are removed.

[0047] In this embodiment, the pressure of the high-pressure inert gas is 0.2 MPa, which can ensure that the high-pressure inert gas forms sufficient scouring force on the inner wall 5 of the riser tube to effectively remove related viscous substances.

[0048] In this emb...

Embodiment 2

[0054] Such as image 3 As shown, in this embodiment, the inert gas inlet pipe 4 is movably connected with the riser pipe 2, and the angle between its axis and the horizontal plane can be adjusted as required, or continuously reciprocated between 0° and 30° to ensure high-pressure inertness. The gas covers the entire riser inner wall 5 in the raw gas flow area.

[0055] In this embodiment, the high-pressure inert gas is fed continuously. Through the continuous feeding method, an airflow barrier is formed on the inner wall 5 of the riser, which can prevent viscous substances such as tar in the raw gas from directly contacting the inner wall 5 of the riser, and eliminate the phenomenon of coking on the inner wall 5 of the riser.

[0056] In this embodiment, the high-pressure inert gas is the high-pressure superheated steam produced by the CDQ waste heat boiler. On the one hand, due to the high temperature of the superheated steam, the adhesion and precipitation of tar will be e...

Embodiment 3

[0058] In this embodiment, on the basis of Embodiment 1, in order to ensure that the flow area of ​​the high-pressure inert gas on the inner wall 5 of the riser covers all the inner wall 5 of the riser, a plurality of inert gas inlet pipes 4 arranged side by side vertically (such as Figure 4 shown).

[0059] In this embodiment, the high-pressure inert gas adopts pressurized high-pressure CO 2 The gas, on the one hand, utilizes the high-pressure air flow to flush the tar deposited on the inner wall 5 of the riser to prevent the newly precipitated tar from depositing on the inner wall 5 of the riser; 1 The carbon dissolution reaction occurs in a high-temperature environment, and the CO 2 Oxidation into CO not only increases the output of coke oven gas, but also absorbs CO produced by other systems, devices or processes to a certain extent. 2 role to achieve CO 2 The transformation of resources into resources plays a positive role in promoting carbon emission reduction in the...

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Abstract

The invention relates to a method for preventing or reducing coking on the inner wall of an ascending pipe of a coke oven. High-pressure inert gas is supplied into the ascending pipe from the upper end of the ascending pipe along the tangential direction of the inner wall of the ascending pipe; tar deposited on the inner wall of the ascension pipe is scoured by high-pressure airflow to prevent newly precipitated tar from being deposited on the inner wall of the ascension pipe; and the high-pressure airflow carries the washed tar and other substances to enter the carbonization chamber. The coking degree of the inner wall of the ascension pipe can be reduced, the raw gas heat exchange efficiency is guaranteed, and the production and maintenance cost is reduced; meanwhile, maximum utilization of resources in the coking production process is achieved, and carbon emission is reduced.

Description

technical field [0001] The invention relates to the technical fields of coal coking, energy saving and environmental protection, and in particular to a method capable of preventing or reducing coking on the inner wall of a riser equipped with a waste heat recovery system during operation. Background technique [0002] The coking industry is a large energy conversion and consumer. In the process of dry distillation of coking coal into coke, a large amount of blast furnace gas or coke oven gas is consumed, and a large amount of heat is also generated. The heat generated by it is mainly composed of four parts: 1) The sensible heat of the red coke released from the carbonization chamber accounts for about 37% of the total heat. 2) Coking coal is isolated from the high-temperature raw gas produced in the process of air carbonization. Its temperature is between 650 ° C and 850 ° C, and the sensible heat it carries accounts for about 30% to 36% of the total heat. 3) The exhaust ga...

Claims

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Application Information

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IPC IPC(8): C10B43/02C10B27/00C10B41/08
CPCC10B43/02C10B27/00C10B41/08Y02P20/129
Inventor 王满李旭东
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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