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Organic matter-containing wastewater treatment method and device

A technology of treatment device and organic matter, applied in heating water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Evaporator fouling and other problems, to prevent fouling problems, ensure efficient heat exchange effect, and avoid fouling effects

Active Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

In this method, a multi-effect evaporator can be installed in the evaporation system, which makes the application field of the MVR plate evaporation system wider. However, as the number of evaporation effects in the evaporation system increases, the energy efficiency coefficient of the mechanical vapor compressor will decrease, which will reduce the energy consumption of the evaporation system. Increase
[0007] CN202315333U and CN203170039U disclose a steam mechanical compression evaporation equipment. This utility model effectively utilizes the secondary steam generated by the evaporator. The latent heat of the secondary steam increases after the pressure is lifted, and the latent heat of the steam after the pressure is used to heat the waste water to achieve the recovery of water. For the purpose of resources, this method has obvious energy-saving effect, but there is a problem of fouling in the evaporator during the application of the equipment

Method used

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  • Organic matter-containing wastewater treatment method and device
  • Organic matter-containing wastewater treatment method and device
  • Organic matter-containing wastewater treatment method and device

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Embodiment 1

[0071] use figure 1 The device, the falling film evaporator adopts figure 2 In the device, the organic wastewater used is acrylonitrile production wastewater, the content of Kjeldahl nitrogen in the acrylonitrile wastewater is 4050mg / L, and the boiling point of the wastewater is 100°C. When the wastewater evaporates more than 85wt% of the water, the concentrated solution is prone to scaling, coking. The raw material wastewater treatment capacity is 15t / h, and the room temperature wastewater is preheated to 99°C through the preheater 2, mixed with the 103°C concentrated liquid, and enters the evaporator 6. The flow ratio of raw material wastewater to concentrated liquid wastewater is 3:1-1.5. The evaporation temperature of the waste water in the evaporator 6 is 100° C., and the compression ratio of the first effect steam compressor 8 is 1.4. The evaporation temperature in the fouler 13 is 103°C, and the compression ratio of the second-effect vapor compressor 15 is 1.5. Two...

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Abstract

The invention provides an organic matter-containing wastewater treatment method and device. The treatment device comprises a wastewater pre-heater, an evaporator, a scaling device, a first-effect steam compressor, a second-effect steam compressor and a condensation water collector. The invention also provides the organic matter-containing wastewater treatment method adopting the device. The wastewater treatment method and device provided by the invention have the advantages of safety, reliability, simple equipment, low operating cost, obvious energy saving effect and the like.

Description

technical field [0001] The invention relates to a method and a device for treating waste water containing organic matter in the technical field of environmental protection and energy saving, in particular to a method and a device for treating waste water containing high molecular organic compounds in oil refinery and chemical industry. Background technique [0002] Organic wastewater mainly comes from chemical industry, road deicing, food processing and other fields, and also includes printing and dyeing wastewater, petroleum mining and processing wastewater, papermaking wastewater and pesticide industry wastewater. The total amount of high-salt organic wastewater is huge and increasing year by year. If it is not treated before discharge, the high concentration of soluble inorganic salts and refractory toxic organic substances in wastewater will cause serious environmental pollution and damage soil, surface water, and groundwater. Therefore, in today's water shortage, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/04B01D1/22C02F101/30
Inventor 廖昌建吴长安赵利民马和旭王海波王晶晶
Owner CHINA PETROLEUM & CHEM CORP
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