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Efficient anti-scale and enhanced heat exchange plate type falling film evaporation system and operation method thereof

A technology of enhanced heat transfer and falling film evaporation, applied in chemical instruments and methods, heating water/sewage treatment, water/sewage treatment, etc., can solve problems such as low evaporation efficiency, poor fluidity of evaporated mother liquor, and easy scaling

Pending Publication Date: 2021-05-07
上海兴全电力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to aim at the above-mentioned deficiencies in the existing concentrated mother liquor technology, to provide a method that can overcome the problems of poor fluidity and easy scaling of the evaporated mother liquor, and low evaporation efficiency, and achieve continuous and efficient one-time drying of the evaporated mother liquor. Efficient anti-scaling and enhanced heat exchange plate falling film evaporation system with moisture content suitable for combustion treatment and its application method

Method used

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  • Efficient anti-scale and enhanced heat exchange plate type falling film evaporation system and operation method thereof
  • Efficient anti-scale and enhanced heat exchange plate type falling film evaporation system and operation method thereof

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Embodiment 1

[0052] In this embodiment, according to the different management standards of the application site, the raw materials can be evaporated into materials with different water contents at one time. For example, the materials can be evaporated to a dry powder state at one time, but this operation method is uneconomical; It is more energy-saving for the material to be recycled for multiple times for evaporation and concentration. The following is a description of multiple cycle evaporation:

[0053] The bottom of the evaporating hopper 32 adopts a conical structure, and the bottom of the conical structure is connected to the concentrated liquid outlet 33. After the first-time heated and evaporated material is deposited in the evaporating hopper 32, the material is re-transported to the hot material circulation pump 20. Inside the material distribution shower pipe 17, the liquid film is formed on the main heat exchange plate 1.3 through the liquid distributor tank 8.1 of the liquid d...

Embodiment 2

[0055]Since the liquid film is continuously evaporated during the descending process, each main heat exchange plate 1.3 is filled with saturated steam, resulting in a decrease in the heat transfer pressure difference, thereby affecting heat transfer; The inert gas is the carrier gas, forming a vaporization core in the liquid phase body, changing the boiling mechanism, and changing the boiling heat transfer usually performed on the heated wall surface to the evaporation heat transfer process on the gas-liquid phase interface. Therefore, a carrier gas enhanced heat exchange system is provided below several groups of main heat exchange plates 1.3, and the carrier gas enhanced heat exchange system includes a carrier gas distributor 21, a carrier gas heater 25, a carrier gas three-way valve 27, a solar energy Heater 28 , air filter 29 , air inlet pipe 30 . The air inlet pipe 30 is provided with an air filter 29, the air inlet pipe 30 is connected to the carrier gas inlet pipe 22 th...

Embodiment 3

[0062] The working principle of the invention is a device for heating and evaporating the liquid film distributed on the heat exchange plates, so the uniform distribution of materials has a great influence on its production capacity and operating performance. An ideal liquid distributor can make the material form a stable and uniform liquid film on the wall of the heat exchange plate. If the liquid material is not evenly distributed, there will be bias flow or channel flow, which will cause the liquid film to be interrupted or evaporate to dryness, resulting in a dry path. This will cause fouling or scarring, which will reduce the heat transfer efficiency on the one hand and affect the service life of the evaporator on the other hand. In addition, since the carrier gas evaporating system is provided in the present invention, the carrier gas flows from bottom to top along the heat exchange plates, and reaches the evaporation chamber 15 after passing through the liquid distributo...

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Abstract

The invention relates to an efficient anti-scale and enhanced heat exchange plate type falling film evaporation system and an operation method thereof, an anti-scale plate type main evaporator, a steam heater, a condensed water heater and a non-scaling carrier gas heater are adopted to continuously evaporate'evaporation mother liquor ', and the problems of production halt and maintenance caused by scaling and the problem of fouling heat resistance are completely eradicated. A heat exchange plate high-frequency fluctuation enhanced heat exchange technology and a carrier gas evaporation enhanced heat exchange technology are adopted so that the working efficiency of the evaporation system is higher than that of a common MVR evaporation system by more than 30%. The drying degree of'evaporation mother liquor 'treated by the evaporation system can be manually controlled, the'evaporation mother liquor' can be evaporated to the required drying degree, and subsequent treatment is facilitated; the evaporation system provided by the invention can evaporate the'evaporation mother liquor 'with high-risk properties until the water content is less than 10% at one time, and then superhigh-temperature crystallization treatment is carried out, so that the problem of secondary pollution is thoroughly eliminated.

Description

technical field [0001] The invention belongs to the technical field of evaporation and concentration of high-salt wastewater, and in particular relates to a high-efficiency anti-scaling and enhanced heat exchange plate type falling film evaporation system. Background technique [0002] In industrial production, such as coal chemical enterprises, iron and steel enterprises, dairy product processing industries, and pesticide and pharmaceutical enterprises, a large amount of production tail water will be produced along with the production. When the salt content in the discharged water exceeds 1000mg / L, that is called hypersaline. This high-salt wastewater contains a large amount of soluble inorganic salts, such as Cl-, SO2-4, Na+, Ca2+ and other ions. At the same time, the wastewater also contains some organic pollutants. Therefore, the high-salt wastewater generated in the production process is difficult to treat. If the untreated high-contained salt water is directly discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/08C02F1/04
CPCC02F1/042C02F1/043C02F1/08
Inventor 褚兴全褚校崧
Owner 上海兴全电力技术有限公司
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