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Method and device for treating wastewater containing organic matters

A technology for organic matter and wastewater, applied in separation methods, chemical instruments and methods, heating water/sewage treatment, etc., can solve problems such as increased energy consumption of the evaporation system, reduced energy efficiency coefficient of mechanical steam compressors, scaling of evaporators, etc., to achieve Efficient heat exchange effect, reducing the risk of fouling, and avoiding the effect of fouling

Active Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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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 wastewater containing organic matters
  • Method and device for treating wastewater containing organic matters
  • Method and device for treating wastewater containing organic matters

Examples

Experimental program
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Embodiment 1

[0069] 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., and the compression ratio of the steam compressor 8 is 1.5. The evaporation temperature in the fouling device 13 is 104°C. Two scrapers are installed in the fouling device 13, and the rotation speed of the scrapers is 360r / min. The dirt is continuously discharged by the dirt pu...

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Abstract

The invention provides a method and device for treating wastewater containing organic matters. The device comprises a wastewater pre-heater, an evaporator, a scaling device, a steam compressor and a condensed water collector. The invention further provides the method for treating the wastewater containing the organic matters by adopting the device. The method and device for treating the wastewater, provided by the invention, have the advantages of safety and reliability, simple equipment, low operation 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 王筱喃廖昌建赵利民王海波马和旭王晶晶
Owner CHINA PETROLEUM & CHEM CORP
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