Leachate treatment system and method suitable for waste incineration power plant

A waste incineration and treatment system technology, applied in the direction of contaminated groundwater/leachate treatment, sedimentation treatment, multi-stage water treatment, etc., can solve the problems of rising treatment costs, difficult replacement of filter materials, and easy hardening of filters, etc., to achieve Reduce the amount of chemicals used, reduce treatment costs, and have no secondary pollution effects

Pending Publication Date: 2020-10-30
中节能工程技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The end adopts the method of adsorption + filtration to remove the remaining pollutants in the water. On the one hand, because the concentration of pollutants in the MBR effluent is still high, the adsorbent is easy to absorb and saturate, so it is necessary to frequently reform and regenerate the adsorbent, and carry out maintenance on the worn adsorbent. Replenishment and replacement; on the other hand, the filter is easy to harden, requires frequent backwashing with air and water, and the filter material is not easy to replace
After apportioning the cost of adsorbent reforming regeneration, filter replacement, etc., the actual treatment cost will increase

Method used

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  • Leachate treatment system and method suitable for waste incineration power plant

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Experimental program
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Effect test

Embodiment 1

[0050] The basic water quality of the leachate of a waste incineration plant in Hebei is as follows: pH is 6.6-6.8; COD concentration is 55000-75000mg / L; ammonia nitrogen concentration is 660-750mg / L; total nitrogen concentration is about 1000-1280mg / L. Utilize leachate treatment system of the present invention to carry out leachate treatment, concrete method step is as follows:

[0051] 1. The leachate enters the regulating tank to adjust the water volume and quality;

[0052] 2. The effluent from the adjustment tank enters the hydrolysis and acidification tank. After hydrolysis and acidification, the pH of the water drops to 5.3, and the pH value is adjusted to 6.9 to 7.2 with sodium carbonate to meet the conditions for methanation in the UASB anaerobic reaction tank;

[0053] 3. The effluent from the hydrolytic acidification tank enters the UASB anaerobic reaction tank to remove most of the organic matter in the water. The effluent pH is 7.8-8.0, the COD concentration is 9...

Embodiment 2

[0064] The basic water quality of the leachate of a waste incineration plant in Anhui is as follows: pH is 6.1-6.5; COD concentration is 50000-65000mg / L; ammonia nitrogen concentration is 480-630mg / L; total nitrogen concentration is about 910-1200mg / L.

[0065] Adopt the method for embodiment 1 to process this leachate, difference is:

[0066] Adjust the pH of the effluent from the pool to 5.4, and use sodium carbonate to adjust the pH to 6.8-7.0;

[0067] The air-water ratio of the air flotation tank is controlled at 16:1, and the ascending flow rate is controlled at 3m / h;

[0068] After the effluent from the sedimentation tank undergoes heat exchange with the effluent from the analytical deamination tower, the temperature is raised to 42°C and enters the analytical deamination tower;

[0069] Use the low-temperature and low-pressure steam (temperature 100-110°C, pressure 0.3-0.4MPa) produced by the waste incineration plant to provide heat, and deamination is carried out und...

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Abstract

The invention relates to the technical field of sewage treatment, in particular to a leachate treatment system and method suitable for a waste incineration power plant. The leachate treatment system suitable for the waste incineration power plant comprises an adjusting tank, a hydrolysis acidification tank, a UASB anaerobic reaction tank, an air floatation tank, a sedimentation tank, an analyticaldeamination tower, an A / O reaction tank, an MBR membrane tank, electron beam irradiation equipment, a coagulation tank, a biological aerated filter and an activated carbon filter which are sequentially connected in the water flow direction. According to the leachate treatment system suitable for the waste incineration power plant, disclosed by the invention, the water quality of leachate generated by the waste incineration power plant after treatment can reach the emission limit value standard of the Control Standard of Domestic Refuse Landfill (GB 16889-2008), and the method has the advantages of good treatment effect, low cost, stable operation and no generation of concentrated phase liquid after membrane separation, so that the method has good application and popularization prospects,and can protect stable production, cost reduction and efficiency increase of a waste incineration plant.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a leachate treatment system and method suitable for waste incineration power plants. Background technique [0002] Landfill leachate is a type of organically polluted wastewater with complex water quality components, high pollutant concentration, large fluctuations in water quantity and quality, and difficult to treat. Its main source is the sanitary landfill and incineration process of municipal solid waste. The characteristics of leachate pollutants produced by landfills and incineration plants are different: the leachate produced by landfills usually has low B / C and high ammonia nitrogen concentration (middle-aged and old landfills), while the leachate produced by incineration plants The filtrate stock solution is relatively "fresh", with higher COD and better B / C. Since the leachate of the incineration plant contains a large amount of refractory macromolecular organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/06C02F101/16C02F101/30
CPCC02F9/00C02F2301/08C02F1/66C02F3/28C02F3/1268C02F2001/007C02F1/305C02F1/5245C02F1/56C02F1/586C02F7/00C02F1/281C02F2103/06C02F2101/16C02F2101/30
Inventor 郭智刘杰刘健平王元月史振宇张欣
Owner 中节能工程技术研究院有限公司
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