Coarse grained oil removing method for Lurgi gasifier coal gasification wastewater

A coarse-grained, coal-to-gas technology, which is applied in gaseous effluent wastewater treatment, separation methods, grease/oily substances/float removal devices, etc., can solve the problems of high cost, secondary pollution, poor treatment effect, etc. Achieve high utilization rate, small packing loss and good compression resistance.

Inactive Publication Date: 2010-07-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a coarse-grained degreasing method for Lurgi furnace coal gas waste water in order to solve the problems of poor treatment effect, high cost and easy secondary pollution in the existing degreasing method

Method used

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  • Coarse grained oil removing method for Lurgi gasifier coal gasification wastewater

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specific Embodiment approach 1

[0017] Specific embodiment one: the method for coarse-grained degreasing of coal-to-gas waste water in the Luqi furnace in this embodiment is carried out according to the following steps: 1. Fill coarse-grained fillers in the coarse-grained device, wherein the coarse-grained fillers are fruit shells , the thickness of the coarse-grained filler is 0.4~0.8 times the height of the coarse-grained device (that is, 2 / 5~4 / 5 of the height of the coarse-grained device); It is transported to the coarse granulation device equipped with coarse granulation filler. The coarse granulation device adopts lower water inlet and upward flow filtration, the filtration rate is 6~7m / h, and the water treatment time of the coarse granulation device is 20~40min , which realizes the deoiling of Lurgi furnace coal gasification wastewater.

[0018] The coarse-grained filler in the coarse-grained device of this embodiment uses pebbles as the supporting layer, and the pebbles can be purchased from the marke...

specific Embodiment approach 2

[0023] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the shell in step one is a walnut shell. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0024] Embodiment 3: This embodiment differs from Embodiments 1 to 2 in that the thickness of the coarse-grained filler in step 1 is 0.5 times the height of the coarse-grained device. Other steps and parameters are the same as those in Embodiments 1 to 2.

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Abstract

The invention provides a coarse grained oil removing method for Lurgi gasifier coal gasification wastewater, relates to the coarse grained oil removing method and solves the problems of poor treatment effect, high cost and easily caused secondary pollution existing in the conventional oil-removing method. The method comprises the following steps: 1, filling coarse grained filler in a coarse grained device; and 2, delivering the Lurgi gasifier coal gasification wastewater to be treated into the coarse grained device filled with the coarse grained filler by a pump so as to realize oil removal of the Lurgi gasifier coal gasification wastewater, wherein lower part water intake and upward flow filter are adopted in the coarse grained device, the filter speed is between 6 and 7m/h, and the water treatment time of the coarse grained device is between 20 and 40 hours. The method has the advantages of good treatment effect, low cost, no production of sludge difficult to treat in the treatment process, and no secondary pollution to the treated water.

Description

technical field [0001] The invention relates to a coarse-grained degreasing method. Background technique [0002] The production process of the coal chemical industry is many and complex, and each production link will produce a large amount of wastewater with complex components, of which high-concentration coal gas washing wastewater is the main one. Wastewater contains not only easily degradable organic substances such as phenolic compounds and benzene compounds, but also degradable organic substances such as pyrrole, naphthalene, furan, and imidazole, as well as refractory organic substances such as pyridine, carbazole, biphenyl, and terphenyl. At the same time, it contains cyanide, sulfide, ammonia nitrogen and other inorganic pollutants. It is a typical industrial wastewater with high concentration, poisonous, harmful and difficult to biodegrade. [0003] Anaerobic biological process has become a research hotspot in coal chemical wastewater treatment technology due to i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40C02F103/18
Inventor 韩洪军袁敏王伟李慧强徐春艳王冰胡宏博
Owner HARBIN INST OF TECH
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