Conversion unit high ammonia nitrogen acid condensate pretreatment system and conversion unit high ammonia nitrogen acid condensate pretreatment method

A high-ammonia-nitrogen acidic, conversion unit technology, applied in the field of high-ammonia nitrogen acidic condensate pretreatment system of the conversion unit, can solve the problems of increasing process complexity, ammonium salt crystallization blockage, occupying space, etc., to avoid corrosion and reduce burden , the effect of effective recycling

Active Publication Date: 2019-02-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The patent (ZL 200910098944.6) discloses a stripping method of process condensate in CO conversion. In order to solve the problem of ammonium salt crystallization blockage in the conversion process condensate stripping system, two stripping towers are used to separate CO 2 and NH 3 stripping, avoiding CO 2 and NH 3 The possibility of simultaneous existence in the system prolongs the per

Method used

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  • Conversion unit high ammonia nitrogen acid condensate pretreatment system and conversion unit high ammonia nitrogen acid condensate pretreatment method
  • Conversion unit high ammonia nitrogen acid condensate pretreatment system and conversion unit high ammonia nitrogen acid condensate pretreatment method
  • Conversion unit high ammonia nitrogen acid condensate pretreatment system and conversion unit high ammonia nitrogen acid condensate pretreatment method

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Example Embodiment

[0042] Example 1

[0043] The shift gas condensate enters the stripping tower from the upper part of the stripping tower 1, the acid gas in the condensate is stripped out, and the stripping gas passes through the top of the stripping tower 1 after defoaming and exits from the top of the stripping tower 1. Entering the pipeline connected to the heat exchanger 2, the temperature of the stripping gas at the top outlet of the stripping tower 1 is 148°C.

[0044] The stripping gas passes through the tube side of the heat exchanger 2 and is cooled by the desalinated water entering the shell side, and enters the separation tower together with the stripping gas passing through the bypass, and controls the temperature of the stripping liquid at the inlet of the separation tower to 135°C; The boiler water supplement is performed through the shell side desalinated water inlet pipeline;

[0045] The cooled stripping liquid enters the separation tower, where gas and liquid are separated, the gas...

Example Embodiment

[0046] Example 2

[0047] The shift gas condensate enters the stripping tower from the upper part of the stripping tower, the acid gas in the condensate is stripped out, and the stripping gas passes through the top of the stripping tower after defoaming, and then enters and exchanges In the pipeline connected to the heat exchanger, the temperature of the stripping gas at the top outlet of the stripping tower is 146°C.

[0048] The stripping gas passes through the tube side of the heat exchanger 2, is cooled by the desalinated water entering the shell side, and enters the separation tower together with the stripping gas passing through the bypass, and controls the temperature of the stripping liquid at the inlet of the separation tower to 138°C; The boiler water supplement is performed through the shell side desalinated water inlet pipeline;

[0049] The cooled stripping liquid enters the separation tower, where gas and liquid are separated, the gas phase is adjusted by the pressure ...

Example Embodiment

[0050] Example 3

[0051] The shift gas condensate enters the stripping tower from the upper part of the stripping tower, the acid gas in the condensate is stripped out, and the stripping gas passes through the top of the stripping tower after defoaming, and then enters and exchanges In the pipeline connected to the heat exchanger, the temperature of the stripping gas at the top outlet of the stripping tower is 140°C.

[0052] The stripping gas passes through the tube side of the heat exchanger 2 and is cooled by the desalinated water entering the shell side, and enters the separation tower together with the stripping gas passing through the bypass, and controls the temperature of the stripping liquid at the inlet of the separation tower to 105°C; The boiler water supplement is performed through the shell side desalinated water inlet pipeline;

[0053] The cooled stripping liquid enters the separation tower, where gas and liquid are separated, the gas phase is adjusted by the pressu...

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Abstract

The invention belongs to the field of treatment of coal chemical wastewater and waste gas, and particularly relates to a conversion unit high ammonia nitrogen acid condensate pretreatment system and aconversion unit high ammonia nitrogen acid condensate pretreatment method. According to the present invention, a coal gasification conversion unit circulating water heat exchanger is replaced with adeineralized water heat exchanger, the deineralized water is used as a heat medium to recover heat and reduce the circulating water field load, the temperature of a steam stripping liquid at a separation tower inlet is raised to 100-138 DEG C, and acid condensate (containing high ammonia nitrogen) sewage wastewater is pretreated in the separation tower by using a steam-like steam stripping method,such that the dissolved gases (high ammonia nitrogen materials and the like) in the liquid phase are gasified and separated as much as possible; and the results show that the total amounts of the high ammonia nitrogen materials, the organic matters and the sulfur-containing compounds in the gas phase is greatly increased, and the liquid phase finally enters the a biochemical unit at a low total amount of less than 50 kg/h, such that the treatment load of the biochemical unit is achieved so as to ensure the standard discharge after the biochemical treatment.

Description

Technical field: [0001] The invention belongs to the field of coal chemical wastewater and waste gas treatment, and in particular relates to a pretreatment system and method for high ammonia nitrogen acidic condensate of a conversion unit. technical background: [0002] Ammonia nitrogen wastewater has great harm to the natural environment and human body. The main hazards of ammonia nitrogen pollution are: disturbing the normal balance of dissolved oxygen in the water body and further deteriorating the water quality; affecting the water quality of the water source and increasing the burden of water treatment; accelerating the eutrophication process of the water body. [0003] The treatment of high ammonia nitrogen wastewater is an urgent problem for enterprises to solve. According to the concentration difference, ammonia nitrogen wastewater is divided into 3 categories: (1) High concentration ammonia nitrogen wastewater: NH 3 -N>500mg / L; (2) Medium concentration ammonia ...

Claims

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Application Information

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IPC IPC(8): B01D3/38B01D19/00
CPCB01D3/38B01D19/0015Y02P70/10
Inventor 冯正坤文加强杨伟怀文焕周永松宋星星吕小敏潘亚虎
Owner CHINA PETROLEUM & CHEM CORP
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