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Method for preventing air release valves of double-hearth kiln from spraying ash

A technology of air release and double-chamber kiln, which is applied in the field of metallurgical production, can solve problems such as environmental pollution, and achieve the effects of avoiding environmental pollution, realizing valve opening, and reducing the amount of gas conveyed

Active Publication Date: 2020-12-29
LIUZHOU IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a method for preventing soot from the air release valve of a double-chamber kiln. The release valve sprays out instantly, causing environmental pollution problems

Method used

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  • Method for preventing air release valves of double-hearth kiln from spraying ash
  • Method for preventing air release valves of double-hearth kiln from spraying ash
  • Method for preventing air release valves of double-hearth kiln from spraying ash

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Effect test

Embodiment 1

[0033] A method of preventing soot spraying on an air release valve of a double chamber kiln comprising the use of a Figure 6 , Figure 7 , Figure 8 The specific method for preventing the soot spraying device of the air release valve of the double-chamber kiln shown is as follows:

[0034] A. When the system cuts off the gas transported to the kiln, that is, before entering the burnout time, the system controls to open the electric control valve 14, and the gas in the kiln is transported to the dust collector through the exhaust pipe 13 and the waste gas pipe 3, and the pressure in the kiln enters Reduce to below 10kpa before the reversing period; when the burnout time is short and the pressure in the kiln drops below the set value, further set to prolong the burnout time to achieve a sufficient reduction in the gas pressure in the kiln; then open the combustion air release valve 11, Adjust the opening speed of the combustion air release valve 11 to 8 seconds to realize th...

Embodiment 2

[0040] A method of preventing soot spraying on an air release valve of a double chamber kiln comprising the use of a Figure 6 , Figure 7 , Figure 8 The specific method for preventing the soot spraying device of the air release valve of the double-chamber kiln shown is as follows:

[0041] A. When the system cuts off the gas transported to the kiln, that is, before entering the burnout time, the system controls to open the electric control valve 14, and the gas in the kiln is transported to the dust collector through the exhaust pipe 13 and the waste gas pipe 3, and the pressure in the kiln enters Reduce to below 10kpa before the reversing period; when the burnout time is short and the pressure in the kiln drops below the set value, further set to prolong the burnout time to achieve a sufficient reduction in the gas pressure in the kiln; then open the combustion air release valve 11, Adjust the opening speed of the combustion-supporting air release valve 11 to 10 seconds t...

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Abstract

The invention discloses a method for preventing air release valves of a double-hearth kiln from spraying ash. The method comprises the following steps as follows: A, when a system cuts off conveying coal gas to the kiln, an electric control valve is opened to convey the gas in the kiln to a dust remover, and the pressure in the kiln is reduced to 10kpa or lower before entering a reversing period;B, blowing is conducted on a dust removal cloth bag once per hour; C, during reversing, a combustion-supporting air release valve is opened for 3 seconds, and then a cooling air release valve is opened; D, raw material granularity control is conducted; and E, the opening and closing action time of each valve is adjusted to be 4-5 seconds by adopting a mode of feeding during combustion. Compared with the prior art, during reversing of the kiln, the gas in the kiln is released to the dust remover in advance, dust sprayed out of the combustion-supporting air release valve is recycled, the pressure in the kiln is reduced through technological operation improvement and other means, and the ash spraying phenomenon generated by the combustion-supporting air release valve and the cooling air release valve is prevented.

Description

technical field [0001] The invention relates to the technical field of metallurgical production, in particular to a method for preventing dust spraying of an air release valve of a double-chamber kiln. Background technique [0002] The double-chamber kiln has two kiln chambers, and an intermediate channel communicating with each other is provided at the lower part of the kiln chamber calcination zone. During the combustion operation, the two kiln chambers of the double-chamber kiln perform a function conversion every 12 to 14 minutes, that is, when one kiln chamber is in the calcination state, the other kiln chamber is in the heat storage state. Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 A double-chamber kiln is shown, including a kiln chamber A and a kiln chamber B connected through a middle passage, and a combustion-supporting air reversing valve 2 and a combustion-supporting air reversing valve 2 are respectively installed near the tops of the ki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D3/15F27D7/02F27D17/00F27D19/00C04B2/10C04B2/12
CPCF27D3/1545F27D19/00F27D7/02F27D17/008C04B2/12C04B2/108F27D2019/004Y02A50/2351
Inventor 李磊韦炳扬吕兴利唐文华于海卢晓辉黄尚凌杨英礼
Owner LIUZHOU IRON & STEEL CO LTD
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