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Anti-scaling device and method for enhancing heat exchange

A technology to enhance heat exchange and heat medium, applied in chemical instruments and methods, damage protection, water softening, etc., to achieve the effects of ensuring evaporation, reducing scaling, and simple operation

Pending Publication Date: 2021-09-24
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above problems, the present invention proposes an anti-scaling device and method for enhancing heat exchange, which mainly solves the problem of salt scale formation on the surface of the evaporator during the evaporation process of high-salt wastewater

Method used

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  • Anti-scaling device and method for enhancing heat exchange

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Embodiment 1

[0020] figure 1 As shown, this embodiment proposes an anti-fouling device for enhanced heat exchange, including an evaporation branch, which includes a liquid storage tank 1, a preheater 2, a scale introduction device 3, an evaporator 4 and a separation tank connected in sequence. Tank 5; the bottom of the separation tank 5 is connected to the discharge liquid storage tank 7 through a pipeline, and the bottom of the separation tank 5 is connected to the evaporator 4 through a pipeline and a forced circulation pump 8 in sequence.

[0021] In this embodiment, a scale introduction device 3 is added before the evaporator 4, and the calcium carbonate scale in the waste water is concentrated inside the scale introduction device 3, so as to prevent the salt scale from accumulating on the evaporator 4 during the evaporation process and reduce the evaporator 4 scale. The amount of fouling can ensure the evaporation effect of the evaporator 4, so that the system can run continuously. F...

Embodiment 2

[0033] An anti-scaling method that strengthens heat exchange. After the wastewater passes through the preheater 2, the wastewater is heated to 60-70°C. It is adjusted to 9-12, the amount of sodium carbonate added is 5-30 mg / L, and then the waste water is introduced into the evaporator 4 for evaporation, and finally enters the separation tank 5 through the pipeline. If the evaporation concentrate in the separation tank 5 meets the preset concentration requirements, The evaporated concentrated liquid flows out from the bottom of the separation tank 5. If the evaporated concentrated liquid does not meet the preset concentration requirements, the evaporated concentrated liquid is returned to the evaporator 4 through the forced circulation pump 8 for heating and evaporation.

[0034] The water vapor evaporated from the wastewater flows from the upper part of the separation tank 5 through the compressor 6, and after being recompressed by the compressor 6, it becomes a high-temperatur...

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Abstract

The invention discloses an anti-scaling device and method for enhancing heat exchange. The device comprises an evaporation branch, and the evaporation branch comprises a liquid storage tank, a preheater, a scale guiding device, an evaporator and a separation tank which are connected in sequence; and the bottom of the separation tank is connected with a discharge liquid storage tank through a pipeline, and is connected into the evaporator through the pipeline and a forced circulation pump in sequence. The anti-scaling device provided by the invention has the advantages that a scale guiding device is additionally arranged in front of the evaporator, calcium carbonate scale in waste water is concentrated and accumulated in the scale guiding device, salt scale is prevented from being accumulated on the evaporator in the evaporation process, the scaling amount of the evaporator is reduced, the evaporation effect of the evaporator is guaranteed, and a system can operate continuously.

Description

technical field [0001] The invention relates to the technical field of evaporation and concentration, in particular to an anti-scaling device and method for enhancing heat exchange. Background technique [0002] High-salt wastewater usually refers to wastewater containing organic matter and at least a mass fraction of total dissolved solids (TDS) greater than 3.5%. In addition to organic pollutants, this type of wastewater also contains a large amount of soluble inorganic salts, such as Cl-, Na+, SO42 -, Ca2+, etc. High-salt wastewater mainly comes from chemical product production industry, coal chemical industry, printing and dyeing industry, etc., and the total amount is huge. High-concentration salt and other harmful substances in wastewater will cause serious damage to soil, surface water, and groundwater. Therefore, it is necessary to research and develop technical methods for treating high-salt wastewater. [0003] Mechanical Vapor Recompression heat pump (Mechanical...

Claims

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Application Information

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IPC IPC(8): F28F19/00F28F19/01C02F9/04C02F1/04C02F5/06
CPCF28F19/002F28F19/01C02F1/042C02F9/00C02F1/048C02F5/06
Inventor 李帅旗张建军冯自平
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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