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Method and device for treating organic wastewater

A treatment device and technology for organic wastewater, applied in water/sewage multi-stage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc. Evaporation system energy consumption increases and other issues, to prevent scaling problems, ensure efficient heat exchange, and avoid equipment scaling

Active Publication Date: 2020-05-19
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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  • Method and device for treating organic wastewater
  • Method and device for treating organic wastewater
  • Method and device for treating organic wastewater

Examples

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Embodiment 1

[0072] use figure 1 The device, the falling film evaporator adopts figure 2 In the device, the organic wastewater used is acrylonitrile production wastewater, the Kjeldahl nitrogen content in the acrylonitrile wastewater is 4050mg / L, the boiling point of the wastewater is 100°C, and when the wastewater evaporates more than 80wt% of the water, the raw wastewater treatment capacity is 15t / h, normal temperature wastewater is preheated to 99°C through the preheater 2, mixed with the 104°C concentrated solution, 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., the vacuum degree of the ejector gas phase steam inlet is 15 kPa, and the compression ratio of the steam compressor 12 is 1.5. The evaporation temperature in the fouling device 14 is 104°C. Two scrapers are installed in the fouling device 14, and the rotation speed of the scrap...

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Abstract

The present invention provides a treatment method and a treatment apparatus for organic wastewater. The treatment apparatus comprises a wastewater preheater, an evaporator, an ejector, a fouling device, a steam compressor and a condensation water collection separator. The present invention further provides a method for treating organic wastewater by using the treatment apparatus. According to the present invention, the treatment method and the treatment apparatus have advantages of safety, reliability, simple equipment, low operation cost, energy saving, significant effect, and the like.

Description

technical field [0001] The invention relates to a method and a device for treating organic waste water 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 very necessary to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F1/04B01D1/22C02F101/30
Inventor 廖昌建赵利民王晶晶吴长安马和旭王海波
Owner CHINA PETROLEUM & CHEM CORP
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