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Device and method for adjusting sintering atmospheres

An atmosphere and regulating valve technology, applied in the combustion method, adjusting the fuel supply, controlling the combustion and other directions, can solve the problems of adjusting the firing atmosphere, affecting the product firing, difficult to adjust the air-fuel ratio of the proportional valve, etc., and achieving a simple structure. , the effect of convenient operation

Inactive Publication Date: 2015-01-21
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the fired product needs to change the firing atmosphere during the firing process, it is difficult to adjust and change the air-fuel ratio of the proportional valve, so it is impossible to adjust and change the firing atmosphere, which will bring a lot of inconvenience to the firing process , affecting the firing of the product

Method used

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  • Device and method for adjusting sintering atmospheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, according to the composition of raw materials in the product formula and the predicted physical and chemical reactions in each stage of the firing process, it is judged that the oxidizing atmosphere is used in the whole firing process of the product; after judging the result, set the proportion of air and natural gas passing through the proportional valve according to the judgment result 13:1; then open the main switch of the kiln and the branch manual valve, at this time, the air forms a pressure difference, and the proportional valve automatically opens under the action of the air pressure. After the proportional valve is opened, the solenoid valve is electrically opened, and the air and natural gas will The ratio of :1 enters the kiln through the gas pipeline, and the gas in the kiln is fully burned, and the air excess coefficient calculated by the detector in the kiln is 1.1; when the product is fired, first turn off the main switch of the kiln, Then close the...

Embodiment 2

[0040]First, according to the composition of the raw materials in the product formula and the predicted physical and chemical reactions in each stage of the firing process, it is judged that the reducing atmosphere is used throughout the firing process of the product; after judging the results, set the proportion of air and natural gas passing through the proportional valve according to the judgment results 7:1; then open the main switch of the kiln and the branch manual valve, at this time the air forms a pressure difference, and the proportional valve automatically opens under the action of the air pressure. After the proportional valve is opened, the solenoid valve is electrically opened, and the air and natural gas The ratio of :1 enters the kiln through the gas pipeline, and the gas in the kiln is fully burned, and the air excess coefficient calculated by the detector in the kiln is 1.05; when the product is fired, first turn off the main switch of the kiln, Then close the...

Embodiment 3

[0042] First, according to the composition of the raw materials in the product formula and the predicted physical and chemical reactions in each stage of the firing process, it is judged that the neutral atmosphere is used in the whole firing process of the product; The ratio is 10:1; then turn on the main switch of the kiln and the branch manual valve, at this time, the air forms a pressure difference, and the proportional valve automatically opens under the action of the air pressure. After the proportional valve is opened, the solenoid valve is electrically opened, and the air and natural gas The ratio of 10:1 enters the kiln through the gas pipeline, and the gas is fully burned in the kiln. The air excess coefficient calculated by the detector in the kiln is 1.15; when the product is fired, first turn off the main switch of the kiln , and then close the solenoid valve. After the solenoid valve is closed, close the branch manual valve. Because the branch manual valve is clos...

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Abstract

The invention provides a device and a method for adjusting sintering atmospheres. When only one of an oxidizing atmosphere, a neutral atmosphere and a reducing atmosphere is needed in the whole sintering process of a product, the ratio of air to a fuel gas is accurately adjusted by use of a proportional valve, after the fuel gas goes into a kiln, the fuel gas is combusted sufficient to establish the desired atmosphere for sintering the product, and in the sintering process, due to the stability of the proportional valve, unstable introduction proportion of the air or the fuel gas can be avoided so that the sintering of the product cannot be affected; when two or three of the oxidizing atmosphere, the neutral atmosphere and the reducing atmosphere are needed or the three atmospheres need to be alternated in the sintering process of the product, firstly, the ratio of the air to the fuel gas is accurately adjusted by use of the proportional valve, the mixed gas is introduced into the kiln and then sufficiently combusted to reach the oxidizing atmosphere, and then the throughput of the fuel gas is adjusted by use of the proportional valve so that the air and the fuel gas go into the kiln in a desired ratio to achieve the sintering atmosphere needed by the product until the sintering of the product is completed. The device and the method for adjusting the sintering atmospheres has the advantages of simple structure and convenient operations.

Description

【Technical field】 [0001] The invention relates to a regulating device, in particular to a device and method for regulating the firing atmosphere. 【Background technique】 [0002] Nowadays, the firing of fired products is to place the ceramic body in the kiln for firing. The kiln generally includes a kiln body, a combustion system, a control system, etc., and the proportional input of air and gas in the combustion system is controlled by a proportional valve. , The selection of proportional valve in the combustion system can ensure the effective adjustment of air and gas according to the set ratio. It can not only ensure the automatic control of temperature, but also ensure the automatic control of the stable atmosphere in the kiln. Usually, after the air-fuel ratio of the proportional valve (that is, the input ratio of air and fuel) is determined, it is difficult to adjust and change the air-fuel ratio. [0003] In the actual production process, the firing atmosphere used in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N1/02F27D7/06
Inventor 罗民华黄亮胡杏乐
Owner JINGDEZHEN CERAMIC UNIV