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A method and device for treating waste water

A technology for treating wastewater and wastewater, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, heating water/sewage treatment, etc. To achieve the effect of realizing the scale transfer of wastewater, slowing down the scale, and increasing the heat transfer rate and heat transfer coefficient

Active Publication Date: 2020-03-17
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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  • A method and device for treating waste water
  • A method and device for treating waste water

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Embodiment 1

[0069] use figure 1 The device, the processor adopts figure 2 According to the device, the acrylonitrile production wastewater mainly contains acrylonitrile polymer compounds, the Kjeldahl nitrogen content in the acrylonitrile wastewater is 4050mg / L, and the evaporation boiling point of the wastewater is 100°C. When the wastewater evaporates more than 80%, the concentrated solution is easy to freeze. Dirt, 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 104°C concentrated liquid, and enters the evaporator 6A. The flow ratio of raw material wastewater to reflux concentrate wastewater is 3:1. The evaporation temperature of the waste water in the evaporator 6A is 104°C, the compression ratio of the steam compressor 9 is 1.5, and the volume ratio of the compressed steam as the evaporation heat source to the steam as the carrier gas is 4:1. The temperature of the co...

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Abstract

The invention provides a method and a device used for processing waste water. The processing device comprises a waste water preheater, a processor, a vapor compressor, a condensed water collector, and a scaling device. The invention also provides the method used for processing waste water using the device. The method and the system used for processing waste water are safe and reliable; equipment is simple; operation cost is low; and energy saving effect is obvious.

Description

technical field [0001] The invention relates to a wastewater treatment method and device in the technical field of environmental protection and energy saving, in particular to a method and device for treating wastewater containing organic compounds. 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 research and develop effective high-salt organic wastewater treatment...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F1/04
Inventor 廖昌建赵利民王海波高景山马和旭王晶晶
Owner CHINA PETROLEUM & CHEM CORP
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