Nitride ceramic ammonia gas tail gas treatment system and treatment method thereof

A technology of nitride ceramics and tail gas treatment, which is applied in combustion methods, waste heat treatment, incinerators, etc., can solve the problems of incomplete removal of waste gas flammable gases, failure to meet environmental protection requirements, unsatisfactory treatment effects, etc., and achieve simple manufacturing process , small equipment investment, good purification effect

Inactive Publication Date: 2020-04-10
福建立亚新材有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nitride ceramics are prepared by the precursor conversion method. In addition to unreacted ammonia, the tail gas also contains flammable gases such as H2, CH4, and small molecule silane generated during the conversion of the precursor. The absorption method commonly used for ammonia tail gas cannot be completely removed. The flammable gas in the exhaust gas cannot meet the environmental protection requirements; at the same time, ammonia gas is a corrosive gas, and the traditional ammonia gas treatment scheme has high requirements for the treatment equipment, pipelines and absorption liquid. However, the traditional recycling method requires a lot of investment and the treatment effect is not ideal.

Method used

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  • Nitride ceramic ammonia gas tail gas treatment system and treatment method thereof

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Effect test

Embodiment 1

[0024] refer to figure 1 , a nitride ceramic ammonia tail gas treatment system, its structure includes a nitriding furnace 1, a pipe fan 2, a furnace 3, an ammonia preheating pipe 4 and an exhaust pipe 5, and the lower left end of the nitriding furnace 1 is provided with an inlet The top of the nitriding furnace 1 is provided with a gas outlet, the gas inlet of the nitriding furnace 1 is connected with an ammonia gas pipeline 6, and the gas outlet of the nitriding furnace 1 is connected with a connecting pipeline 7, which is close to the furnace chamber 3 There is a first valve 71 connected to the end face, the pipe fan 2 is arranged on the middle part of the connecting pipe 7, the other end of the connecting pipe 7 extends into the furnace 3, and communicates with the ammonia gas preheating pipe 4 located in the furnace 3 , the ammonia preheating pipeline 4 has a built-in catalyst 41, the other end of the ammonia preheating pipeline 4 is connected with a nitrogen-hydrogen mix...

Embodiment 2

[0026] refer to figure 1 , a treatment method for a nitride ceramic ammonia tail gas treatment system. First, open the natural gas valve, and the natural gas will flow from the natural gas source into the combustion pipeline. At this time, the natural gas will preheat the furnace. When the temperature in the furnace reaches the ammonia gas At the cracking temperature (800°C), open the first valve, and then gradually close the natural gas valve, and the exhaust gas from the gas outlet of the nitriding furnace enters the ammonia preheating pipeline through the connecting pipeline. Under the action of the nickel catalyst, the ammonia The gas will be cracked, and the nitrogen-hydrogen mixture and tail gas produced by ammonia cracking will flow into the combustion pipe together, and the combustion port on the combustion pipe will burn hydrogen and other combustible gases together. expelled from the trachea.

[0027] It should be noted that the electrical components presented in th...

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Abstract

The invention discloses a nitride ceramic ammonia gas tail gas treatment system and a treatment method thereof. The structure comprises a nitriding furnace, a pipeline fan, a hearth and an ammonia gaspreheating pipeline. A gas inlet of the nitriding furnace is connected with an ammonia gas pipeline. A gas outlet of the nitriding furnace is connected with a connecting pipeline. The pipeline fan isarranged on the connecting pipeline, the other end of the connecting pipeline is connected with the ammonia gas preheating pipeline. A catalyst is arranged in the ammonia gas preheating pipeline, theother end of the ammonia gas preheating pipeline is connected with a nitrogen-hydrogen mixed gas pipeline, the hearth is provided with a combustion pipeline, the nitrogen-hydrogen mixed gas pipelineis connected with the combustion pipeline, the combustion pipeline is connected with a natural gas source, the combustion pipeline is provided with a plurality of combustion openings, and an exhaust pipeline is arranged in the middle of a top end of the hearth. By adopting the structure, an ammonia gas tail gas is treated by a catalytic cracking method to obtain a combustible nitrogen-hydrogen mixed gas, and heat generated after ignition can maintain energy required by ammonia gas cracking and water and carbon dioxide are generated through combustion so that requirements of energy conservation, emission reduction and environmental protection are met.

Description

technical field [0001] The invention relates to a nitride ceramic ammonia tail gas treatment system and a treatment method thereof. Background technique [0002] Nitride ceramics are prepared by the precursor conversion method. In addition to unreacted ammonia, the tail gas also contains flammable gases such as H2, CH4, and small molecule silane generated during the conversion of the precursor. The absorption method commonly used for ammonia tail gas cannot be completely removed. The flammable gas in the exhaust gas cannot meet the environmental protection requirements; at the same time, ammonia gas is a corrosive gas, and the traditional ammonia gas treatment scheme has high requirements for the treatment equipment, pipelines and absorption liquid. Under the circumstances, the traditional recycling method requires a lot of investment and the treatment effect is not ideal. Contents of the invention [0003] In view of the above problems, the present invention provides a n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/07F23G5/027F23G5/14F23G5/44F23G5/50F27D17/00
CPCF23G5/027F23G5/14F23G5/44F23G5/50F23G7/066F23G7/07F23G2201/303F23G2202/10F23G2204/103F23G2209/14F27D17/00Y02P10/143Y02P10/25Y02A50/20
Inventor 杨晓峰郑桦蔡径昭张燕真
Owner 福建立亚新材有限公司
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