Self-heating heat-pump energy-saving device for lurgi furnace gasification sewage and method for sewage pretreatment with device

A technology of gasifying sewage and energy-saving devices, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., and can solve problems such as high energy consumption, high operating costs, and easy blockage of equipment , to reduce energy consumption and treatment costs, eliminate crystallization and scaling, and achieve obvious energy-saving effects

Inactive Publication Date: 2013-05-01
CHINA COAL ENERGY HEILONGJIANG COAL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of easy blockage of equipment, high energy consumption and high operating cost in the existing Lurgi furnace sewage treatment process, and provides a Lurgi furnace gasification sewage self-heating heat pump energy-saving device and using it for sewage pretreatment Methods

Method used

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  • Self-heating heat-pump energy-saving device for lurgi furnace gasification sewage and method for sewage pretreatment with device
  • Self-heating heat-pump energy-saving device for lurgi furnace gasification sewage and method for sewage pretreatment with device
  • Self-heating heat-pump energy-saving device for lurgi furnace gasification sewage and method for sewage pretreatment with device

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specific Embodiment approach 1

[0011] Specific implementation mode one: combine image 3 In this embodiment, a Lurgi furnace gasification sewage self-heating heat pump energy-saving device includes a vacuum extraction and sedimentation composite tower 1, a vacuum device 2, a heat exchange separation tower 3, a circulation pump 4, an ammonia water pump 5 and a sewage circulation pump 6; The upper part of the extraction and settling compound tower 1 is a vacuum extraction part and the lower part is a settling part. The vacuum extraction part includes an arc-shaped top 1-1, a cylindrical side wall 1-2, a gas phase outlet 1-3 at the top of the tower, and a baffle 1 -4, Lurgi hot sewage inlet 1-5, Lurgi cold sewage inlet 1-6 and several large-pore sieve plates 1-7; tower top gas phase outlet 1-3 is arranged at the center of the arc-shaped top 1-1, folding The baffle 1-4 is suspended below the gas phase outlet 1-3 at the top of the tower, and the baffle 1-4 is fixedly connected with the arc-shaped top 1-1 through...

specific Embodiment approach 2

[0016] Embodiment 2: This embodiment differs from Embodiment 1 in that: the vacuum pumping device 2 is a vacuum pump or a steam extractor. Others are the same as the first embodiment.

specific Embodiment approach 3

[0017] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the distance between the baffle plate 1-4 of the described vacuum extraction and settling compound tower 1 is 0.5m~3 from the tower top gas phase outlet 1-3 1m. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a sewage pretreatment device and a method for sewage pretreatment with the device, in particular to a self-heating heat-pump energy-saving device for lurgi furnace gasification sewage and a method for the sewage pretreatment with the device. The problems that the existing lurgi furnace sewage treatment technology is high in energy consumption and operating cost, and equipment is blocked easily are solved. The self-heating heat-pump energy-saving device for the lurgi furnace gasification sewage comprises a vacuum extraction and sedimentation compound tower, an evacuating device, a heat exchange knockout tower, a circulating pump, an aqua-ammonia pump and a sewage circulating pump. The method comprises the steps that hot sewage enters the vacuum extraction and sedimentation compound tower; sensible heat in the sewage entering the vacuum extraction and sedimentation compound tower is converted to gasification latent heat by pressure reduction through the evacuating device; pressure is recovered after the sewage enters the heat exchange knockout tower; the latent heat is released to be converted to the sensible heat; and the heat is sent back by heat-exchange heating low-temperature sewage for cycling. The device and the method can be applied to pretreatment of the lurgi furnace gasification sewage.

Description

technical field [0001] The invention relates to a sewage pretreatment device and a sewage pretreatment method using the same. Background technique [0002] Lurgi furnace is a type of coal gasification furnace with many applications and stable operation. The commonly used furnace type has a daily production capacity of 480,000 standard cubic meters of city gas and a daily processing of about 500 tons of raw coal. Since the crude gas is washed with water, the volume of gas washing sewage generated during the production process is 42 tons per hour. The pollution load of these sewage is very high, containing a large amount of ammonia, carbon monoxide, carbon dioxide, hydrogen sulfide, phenol, tar and coal dust, etc. After pretreatment such as flash evaporation and sedimentation, the total phenol concentration is 6000mg / L, and the COD value is 20000mg / L , the pH value is about 9~10.5. [0003] At present, the combination of chemical treatment process and biochemical treatment o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10F25B30/06
Inventor 宋军牛玉梅刘跃王正忠吴昌祥刘茉莉张洪慧
Owner CHINA COAL ENERGY HEILONGJIANG COAL CHEM
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