Device for evaporation pyrolysis

A kind of evaporation heat, decent technology, applied in evaporation, ammonia preparation/separation, heating water/sewage treatment, etc., can solve the limitation of large-scale popularization and use of urea solution pyrolysis, insufficient urea solution evaporation and pyrolysis, affecting SCR system Denitration efficiency and other issues, to achieve the effect of improving the efficiency of evaporation and pyrolysis, the structure is simple and reliable, and the uniformity of the flow field distribution

Pending Publication Date: 2021-07-23
北京工大环能科技有限公司
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Problems solved by technology

[0004] However, the pyrolysis process of urea solution to produce ammonia is restricted by the flue structure of the denitrification system, the layout of the injection system, the lack of heat in the flue gas, and the unsatisfactory flue gas flow field conditions in the flue, which will cause unsatisfactory evapo

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  • Device for evaporation pyrolysis
  • Device for evaporation pyrolysis
  • Device for evaporation pyrolysis

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Example Embodiment

[0040] Specific Example 1

[0041] The following combined with the drawing of the distributed energy denitration system of a certain power plant gas internal combustion engine as an example, and the present invention will be further described.

[0042] In this first embodiment, the development project is studied in the use of SCR method flue gas denitration process, and the reducing agent is urea, and ammonia gas is prepared by the urea solution thermolysulofer, so that the system can achieve a nitrogen oxide (NOx) emission indicator below 30 mg / The purpose of NM3. High efficiency evaporation pyrolysis device and denitration system such as Figure 4 As shown: The gas internal combustion engine generates a flue gas temperature of 370 to 550 ° C, up to 600 ° C, and the power generation force is 4.4mW, and the amount of flue gas is from 100% in the gas internal combustion engine load. 19500 nm3 / h. At the state, the NOx is 350 mg / nm3 under the dry base 5% o2, and the flue gas ente...

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Abstract

The invention discloses a device for evaporation pyrolysis, and belongs to the field of energy conservation and environmental protection. The device is mainly applied to an SCR (Selective Catalytic Reduction) method flue gas denitration system for preparing ammonia gas by a urea solution pyrolysis process, and is mounted at an upstream flue position of an SCR reactor. The evaporation pyrolysis device consists of a pyrolyzer shell, a shield body surface, a swirl vane, a ring surface, a spray gun, a rear flow guide grid and a sieve plate. According to the device, the retention time of reducing agent liquid drops in flue gas is prolonged by controlling a flue gas flowing track, so that the reducing agent liquid drops are in full contact with the flue gas, the evaporation pyrolysis efficiency of ammonia gas generated by a urea solution is effectively improved, the flue gas and the ammonia gas are fully mixed, and meanwhile, the distribution uniformity of a flow field in a flue is improved, so that the denitration efficiency of an SCR system is improved. In addition, the device can also be applied to the technical fields of desulfurization wastewater evaporation, seawater evaporation and the like, the evaporation effect can be improved, and the energy consumption of evaporation is reduced.

Description

technical field [0001] The invention relates to the field of energy saving and environmental protection, and is mainly used in the SCR method flue gas denitrification system for preparing ammonia through the pyrolysis process of urea solution. Evaporation and pyrolysis efficiency, strengthen the sufficient mixing of flue gas and ammonia, and improve the uniformity of flow field distribution in the flue, thereby improving the denitrification efficiency of the entire SCR system; in addition, the invention can also be applied to desulfurization wastewater evaporation, seawater evaporation, etc. In the technical field, the effect of evaporation can be improved and the energy consumption of evaporation can be reduced. Background technique [0002] SCR flue gas denitrification technology is one of the most mature denitrification technologies in the world, and has been widely used in my country. In the SCR flue gas denitrification system, the reducing agent ammonia (NH3) is the la...

Claims

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Application Information

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IPC IPC(8): B01D1/00B01D53/86B01D53/56C02F1/04C01C1/08C02F103/08C02F103/18
CPCB01D1/00B01D53/8625C02F1/04C01C1/086B01D2258/0283C02F2103/08C02F2103/18B01D2251/2062
Inventor 黄庆华
Owner 北京工大环能科技有限公司
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