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Method and apparatus for treating urban sewage by means of flue gas desulfurization of power plant and fly ash

A technology of urban sewage and fly ash, applied in chemical instruments and methods, separation methods, biological water/sewage treatment, etc., can solve problems such as difficult operation, difficult sewage treatment costs, unblocked charging channels, etc., and achieve a large environment and social benefits, protection of water environment and atmospheric environment, improvement of treatment compliance rate and recycling rate

Inactive Publication Date: 2005-11-23
DALIAN UNIV OF TECH
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Problems solved by technology

Although there are many reasons for the above problems, the high investment and operating costs of the sewage treatment process are the key to the problem
It is more difficult for the municipal government to bear the sewage treatment fee completely, while the operating company has the problem of unblocked charging channels, so the operation is more difficult

Method used

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  • Method and apparatus for treating urban sewage by means of flue gas desulfurization of power plant and fly ash
  • Method and apparatus for treating urban sewage by means of flue gas desulfurization of power plant and fly ash
  • Method and apparatus for treating urban sewage by means of flue gas desulfurization of power plant and fly ash

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Embodiment Construction

[0030] Design basis: daily water treatment volume: 100,000 tons; raw water COD concentration: 400mg / l; treated COD concentration: 50mg / l flue gas sulfur dioxide concentration: 500mg / standard cubic meter; flue gas sulfur dioxide concentration after desulfurization: 50mg / standard cubic meter ;Temperature before flue gas desulfurization: 70-100°C; Temperature after flue gas desulfurization: 30-40°C; Ecological treatment unit temperature: Summer: 30-35°C; Winter: 25-30°C;

[0031] Process parameter calculation:

[0032] 1. Sedimentation tank 16: residence time: 4 hours, 17,000 cubic meters, built under the ecological treatment unit.

[0033] 2. Coagulation tank 17: Dosing coagulant: 200mg / l; dosage: 20 tons / day; effective iron equivalent to 4 tons / day; coagulation reactor: residence time: 0.2 hours; 800 cubic meters; secondary settling Pool 18: 1.5 hour residence time inclined plate, volume: 6250 m3, built under the ecological treatment unit.

[0034] 3. Ecological treatment uni...

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Abstract

Disclosed is a method and apparatus for treating urban sewage by means of flue gas desulfurization of power plant and fly ash, which integrate the utilization of waste water, waste gas and waste slag in environmental engineering, by reutilizing industrial waste, the urban sewage water can be reused and meet the national standard for recycled water after ecological treatment, the problem of coal ash depositing is also solved.

Description

technical field [0001] The invention belongs to the technical field of novel ecological engineering for the treatment and comprehensive utilization of waste water, waste gas and waste residue in environmental engineering. Background technique [0002] Guangming Daily and other newspapers reprinted in July 2004 the problems found in the special inspection of the operation of my country's urban sewage treatment plants that Wang Jirong, the deputy director of the State Environmental Protection Administration, reported to the media: Of the 532 sewage treatment plants inspected, 275 were not Normal operation, accounting for 51.7%. Among them, 43 buildings were basically not in normal operation, accounting for 8.1%; 121 buildings with an operating load of less than 30%, accounting for 22.7%; 111 buildings with water discharge exceeding the standard, accounting for 20.9%, and the average number of days exceeding the standard was 152 days. The designed treatment capacity of these 53...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCY02W10/10
Inventor 周集体项学敏金若菲童健张爱丽吕红夏元化王国栋曹同川
Owner DALIAN UNIV OF TECH
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