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Gasifying method for conversion section low-temperature condensate to extract ammonia

A low-temperature condensation and workshop technology, applied in the direction of chemical instruments and methods, preparation/separation of ammonia compounds, ammonia, etc., can solve the problems of heat waste and complicated process, so as to simplify the process flow, improve heat utilization rate, and eliminate superheated steam The effect of consumption

Inactive Publication Date: 2018-06-12
北京阳华科技有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a gasification method for extracting ammonia from low-temperature condensate in the conversion section, so as to solve the problems of heat waste and complicated flow in the existing process

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  • Gasifying method for conversion section low-temperature condensate to extract ammonia

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Embodiment Construction

[0016] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0017] Such as figure 1 As shown, the middle part of the heat recovery stripper 2 is provided with a liquid inlet, the bottom is respectively provided with an air inlet and a liquid outlet, and the top of the heat recovery stripper 2 is provided with a gas outlet. The condenser is provided with an air outlet, a liquid outlet and an air inlet. The gas outlet of the high-pressure flash tank 1 is connected to the gas inlet of the heat recovery stripper 2 through a pipeline, and the gas outlet of the heat recovery stripper 2 is connected to the gas inlet of the condenser 3 through a pipeline.

[0018] The gasification method for extracting ammonia from the low-temperature condensate 5 in the transformation section comprises the following steps:

[0019] Step a, the low-temperature condensate 5 of the conversion section is input into the ...

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Abstract

The invention relates to a gasifying method for conversion section low-temperature condensate to extract ammonia. The gasifying method includes following steps: step a, inputting the low-temperature condensate of a conversion section into the middle of a heat recovery stripping tower; step b, inputting high-flash steam as a heat source of a gasifying section into the bottom of the heat recovery stripping tower, enabling the low-temperature condensate and the high-flash steam to be in countercurrent contact on each tower plate inside the heat recovery stripping tower for heat exchange, and heating the low-temperature condensate to extract ammonia gas; step c, enabling the ammonia gas along with gaseous phase to enter the upper portion of the heat recovery stripping tower for further concentration, inputting the ammonia gas into a condenser, and inputting generated ammonia water into an ammonia recycling section for recycling. The gasifying method has the advantages that heat utilizationrate of the high-flash steam can be increased, overheat steam consumption in an original ammonia extracting section is eliminated, and technological processes are simplified.

Description

technical field [0001] The invention relates to the technical field of the coal chemical industry, in particular to a gasification method for extracting ammonia from low-temperature condensate in a transformation section. Background technique [0002] In the traditional process, the nitrogen contained in the coal will generate ammonia gas in the gasification section, and some ammonia gas will also be generated in the transformation section. The ammonia content in the low-temperature condensate produced in the transformation section is as high as thousands or even tens of thousands of ppm. Ammonium bicarbonate and other substances produced by ammonia, carbon dioxide and water will crystallize and block pipes and heat exchangers at low temperatures. Therefore, under normal circumstances, the low-temperature condensate in the transformation section will be treated with ammonia extraction. However, in the ammonia extraction process, the temperature rise of the low-temperature ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/04
CPCC01C1/0458Y02P20/10
Inventor 张本凤马宏波岳军王帅宋文军
Owner 北京阳华科技有限公司
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