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Device for preparing ammonia gas

A technology of ammonia and flue gas, applied in the field of flue gas denitrification, achieves the effects of simple structure, enhanced turbulence and eddy current intensity, and low manufacturing and operating costs

Pending Publication Date: 2019-10-11
北京工大环能科技有限公司
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AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to solve the problem of the preparation of the reductant ammonia required by the flue gas denitrification system

Method used

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Embodiment Construction

[0029] In the following, the present invention will be further described by taking the flue gas denitrification system of a 4.4MW gas-fired internal combustion engine unit of a distributed energy station as an example in conjunction with the drawings.

[0030] A distributed energy station 4.4MW gas internal combustion engine unit flue gas denitrification system, such as figure 1 and Figure 4 , the flue gas temperature at the gas internal combustion engine (1) is 430-550°C, the highest can reach 600°C, the power generation output is 4.4MW, and the flue gas volume is 19888Nm in dry state when the load rate of the gas internal combustion engine is 100%. 3 / h, at standard state, dry basis 5%O 2 condition NO x Both are 500mg / Nm 3 The flue gas outlet temperature of the lithium bromide equipment (2) is 145°C; the suitable temperature range of the low-temperature catalyst (4) is 170-400°C; a heat exchanger (16) is added between the low-temperature SCR reactor (3) and the chimney ...

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Abstract

The invention discloses a device for preparing ammonia gas. The device is characterized by comprising an ammonia gas generator and a turbulent flow surface arranged on the inner wall of the ammonia gas generator, the inner wall of the ammonia gas generator is provided with a supporting frame, and the supporting frame is provided with the turbulent flow surface; the number of the ammonia gas generator and the number of the turbulent flow surface are at least one; the turbulent flow surface is arranged in an outlet of the ammonia gas generator. A spray gun is inserted into the ammonia gas generator, and the entry of the smoke is from an inlet in the bottom of the turbulent flow surface. The device for preparing the ammonia gas has the advantages that the efficiency is high, the structure issimple, the device is safe and reliable, energy conservation and environment protection are achieved, and the production and running cost is lower; through the optimized design of the structure of theammonia gas generator, the ammonia gas conversion rate of urea is increased; the arrangement of the turbulent flow surface can play the role of enhancing the formed turbulence and vortex intensity.

Description

technical field [0001] The invention relates to a device for preparing ammonia, in particular to a device for improving the ammonia conversion rate of urea, belonging to the field of flue gas denitrification. Background technique [0002] With the development of industrial economy, air pollution is becoming more and more serious. One of the main air pollutants is nitrogen oxides, which not only damage animals and plants, destroy the ozone layer, stimulate the human respiratory system, but are also one of the main substances that cause greenhouse effect, acid rain and photochemical reactions. Nitrogen oxide emission limits are trending towards stricter requirements around the world. [0003] At present, the technical solutions for reducing nitrogen oxide emissions mainly include: (1) low-nitrogen combustion technology, that is, to control the formation of nitrogen oxides during the combustion process, which is mainly applicable to large coal-fired boilers, etc.; (2) selectiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/08
CPCC01C1/086
Inventor 黄庆华
Owner 北京工大环能科技有限公司