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Coal pyrolysis sewage treatment system and treatment method

A coal pyrolysis and sewage technology, which is applied in the field of coal pyrolysis sewage treatment system, can solve the problems of single application limitation of biological treatment method, high treatment cost and high equipment requirements, and achieve the effect of realizing resource utilization and reducing operation cost.

Pending Publication Date: 2016-12-21
SHENWU TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This limits the single application of biological treatment, which is often only used in the pretreatment of sewage or the dilution of sewage
[0005] Physicochemical method can be used not only as a method of sewage pretreatment, but also can be applied to the advanced treatment of sewage. It has the advantages of low water quality requirements, high treatment load and high treatment efficiency, but the treatment cost is high and the requirements for equipment are high. , so cannot be used on a large scale

Method used

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  • Coal pyrolysis sewage treatment system and treatment method
  • Coal pyrolysis sewage treatment system and treatment method

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Embodiment 1

[0083] This embodiment provides a system for treating low-rank coal pyrolysis sewage, and its structural diagram is as follows figure 1 shown. Specifically include: buffer adjustment tank 1, grease trap 2, acid-base adjustment tank 3, steam stripper 4, evaporation concentration tank 5, steam boiler 6, pyrolysis furnace 7, mixer 8, dosing machine 9, dosing Machine 10, ammonia storage tank 11, water pump 12 and high-pressure water pump 13.

[0084] The buffer regulating tank 1 is provided with a sewage inlet, an acid-base regulating liquid inlet and a sewage outlet, and the sewage outlet is arranged at the bottom of the buffer regulating tank 1 . The buffer adjustment tank 1 is equipped with a dosing machine 9 and a submersible mixer, and the dosing machine 9 is connected to the inlet of the acid-base adjustment solution of the buffer adjustment tank 1 .

[0085] The grease trap 2 is provided with a pyrolysis sewage inlet, a degreasing sewage outlet and an oil sludge outlet. T...

Embodiment 2

[0093] This embodiment provides a method for treating sewage from coal pyrolysis using the system provided in Embodiment 1. Specific process such as figure 2 shown.

[0094] The water quality of the coal pyrolysis sewage that present embodiment adopts is as follows:

[0095] COD=16600mg / L, BOD=6700mg / L, ammonia nitrogen=1700mg / L, volatile phenol=10000mg / L, pH=9.6.

[0096] After the sewage is discharged from the coal pyrolysis system, it enters the buffer adjustment tank 1. The dosing machine 9 adds sulfuric acid into the water body to adjust the pH of the sewage from 9.6 to 7, and the residence time is 5 hours.

[0097] The sewage discharged from the buffer adjustment tank 1 enters the grease trap 2. The oil scraper and the oil drain tank remove the suspended oil sludge in the sewage.

[0098] The sludge discharged from the grease trap 2 is fed into the mixer 8 . The oil sludge is mixed with coal and then sent to the pyrolysis furnace 7 for pyrolysis treatment to recov...

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Abstract

The invention provides a coal pyrolysis sewage treatment system and treatment method. The coal pyrolysis sewage treatment system provided by the invention comprises a deoiling unit, an acid and alkali regulating unit, a deamination unit, an evaporation concentration unit, a mixed spraying combustion unit and a pyrolysis unit, wherein the acid and alkali regulating unit is respectively connected with the deoiling unit and the deamination unit; the evaporation concentration unit is respectively connected with the deamination unit and the mixed spraying combustion unit; the pyrolysis unit is respectively connected with the deoiling unit and the mixed spraying combustion unit. The coal pyrolysis sewage treatment system and treatment method provided by the invention are coupled with a coal pyrolysis process, so that the sewage treatment operation cost is reduced; useable resources in the sewage are recovered.

Description

technical field [0001] The invention relates to industrial sewage treatment, in particular to a coal pyrolysis sewage treatment system and treatment method. Background technique [0002] my country has abundant coal reserves, and the proportion of low-rank coal such as lignite in China's coal and energy supply is on the rise. However, direct combustion of low-rank coal for heating and power generation is not only inefficient, but also causes serious environmental pollution. Pyrolysis of low-rank coal can produce semi-coke, gas, and tar. The method can not only reduce the environmental pollution caused by burning coal, but also fully utilize the compounds of higher economic value contained in the coal. However, the processes of rapid pyrolysis of coal, recovery and purification of pyrolysis gas, and recovery and refining of chemical products produce high-concentration sewage, which contains a large number of pollutants, such as volatile phenols, cyanide-containing compounds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F11/10C10B53/00
CPCY02W10/40C02F9/00C02F1/048C02F1/20C02F1/40C02F11/10C10B53/00
Inventor 蔡先明肖磊张安强任浩华刘璐吴道洪
Owner SHENWU TECH GRP CO LTD
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