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Method for treating acid-containing and ammonia-containing wastewater and equipment system for implementing the method

A waste water and pretreatment technology, applied in chemical instruments and methods, multi-stage water/sewage treatment, degassed water/sewage treatment, etc. question

Active Publication Date: 2022-05-31
SYNEFUELS CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the continuous accumulation of ammonia, the content of ammonia components in the gray water of the gasification device is also increasing. The excessively high ammonia nitrogen content of the discharged gray water leads to the abnormal operation of the sewage treatment device, and ultimately fails to meet the environmental protection discharge requirements.
These ammonia components will enter the downstream equipment such as purification equipment, causing ammonia accumulation in the coal gasification system

Method used

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  • Method for treating acid-containing and ammonia-containing wastewater and equipment system for implementing the method
  • Method for treating acid-containing and ammonia-containing wastewater and equipment system for implementing the method

Examples

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Embodiment

[0079] The materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified. The experimental methods used in the following examples are conventional methods unless otherwise specified.

[0080] Attached below figure 1 The present invention is further described.

[0081] The ammonia washing water from the low-temperature methanol washing unit and the acid-containing ammonia-containing waste water from the CO conversion unit are mixed and sent as raw material (stream 001) to the condensate flash tank 1. Under the operating conditions of 0.7MPaG and 65°C, through After flash evaporation under reduced pressure, flash gas and condensate I were obtained.

[0082] The condensate I is sent to the top of the pretreatment tower 2, and under the operating conditions of 0.3MPaG and 65°C, nitrogen or natural gas (dynamically changing with the calorific value requirements of the acid gas) is used as the stripping medium to remove th...

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Abstract

The invention relates to a method for treating acid-containing and ammonia-containing wastewater and an equipment system for implementing the method. The method of the present invention treats acid-containing and ammonia-containing waste water through steps such as condensate flash evaporation, deacidification and deamination, and uses inert gas and / or natural gas to change the partial pressure of dissolved components in waste water and utilizes dissolved components to volatilize Based on the principle of different degree and solubility, the simple separation and recovery of acidic impurities and basic impurities can be achieved, and purified process water that can be reused is obtained at the same time.

Description

technical field [0001] The invention relates to a method for treating acid-containing and ammonia-containing waste water produced in coal chemical industry, petrochemical industry, fine chemical industry and other industrial processes and a corresponding equipment system. Background technique [0002] In the field of coal chemical industry, since the raw material containing nitrogen enters the coal gasification device during the coal gasification process, ammonia is generated and accumulated in the gasification device and other sections, part of the ammonia will be discharged with the gray water, but most of it will Ammonia will re-enter the gasification unit along with the reuse of process water. Due to the continuous accumulation of ammonia, the ammonia component content in the gray water of the gasification device is also increasing. The excessively high ammonia nitrogen content of the discharged gray water leads to the abnormal operation of the sewage treatment device, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F101/16C02F101/10
CPCC02F1/06C02F1/20C02F2101/16C02F2101/101
Inventor 武秀丽周强李鹏余晓忠李永旺
Owner SYNEFUELS CHINA
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