A multi-stage evaporation and condensation treatment system

Abstract

This invention discloses a multi-stage evaporation and condensation system. The system includes a liquid inlet system, a primary heat exchange system, a secondary heat exchange system, a primary evaporation system, a secondary evaporation system, a primary condensation system, a secondary condensation system, and a liquid outlet system. The liquid inlet system connects to two heat exchange systems, which in turn connect to the evaporation system and the condensation system in sequence to the liquid outlet system. The system also includes a cleaning system connected to the primary and secondary heat exchange systems. The primary and secondary heat exchange systems are equipped with heat exchange enhancement pipes, and each structure is equipped with a valve. The two sets of evaporation and condensation systems designed in this invention improve the overall adjustability of the system, increase the overall operating efficiency, and improve the product qualification rate by setting heat exchange enhancement pipes in the primary and secondary heat exchange systems.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a multi-stage evaporation and condensation treatment system. Background Technology

[0002] Multi-effect evaporation systems are primarily used to treat industrial wastewater with high concentration, high color, and high salinity. They also recover byproducts generated during wastewater treatment. These systems feature low steam consumption, low evaporation temperature, high concentration ratio, and are more efficient, energy-saving, and cost-effective. The process mainly involves heat exchange, evaporation, and condensation. However, during heat exchange, due to prolonged use, fouling can easily accumulate inside the heat exchangers, making it difficult to assess their condition. Furthermore, the high velocity of the heat exchange medium entering the heat exchanger can lead to poor heat exchange efficiency. Summary of the Invention

[0003] To achieve the above objectives, the technical solution of the present invention is as follows: A multi-stage evaporation and condensation treatment system, comprising a liquid inlet system, a primary heat exchange system, a secondary heat exchange system, a primary evaporation system, a secondary evaporation system, a primary condensation system, a secondary condensation system, and a liquid outlet system. The liquid inlet system is connected to two heat exchange systems, and the two heat exchange systems are sequentially connected to the evaporation system and the condensation system to the liquid outlet system. The system also includes a cleaning system, which is connected to the primary heat exchange system and the secondary heat exchange system. The primary heat exchange system and the secondary heat exchange system are equipped with heat exchange enhancement pipes, and each structure is equipped with a valve.

[0004] Based on the above technical solution, the two-stage evaporation and condensation treatment system designed in this invention improves the overall adjustability of the system by setting heat exchange enhancement pipes in the primary and secondary heat exchange systems. When the heat exchange efficiency of one of the heat exchange systems decreases, including due to fouling, this can be detected by the positioning detection mechanism. The valves between them can be opened and the valves of the primary heat exchange system and the primary evaporation system can be closed. The material to be treated will pass through the primary and secondary heat exchange systems in sequence, which improves the overall operating efficiency of the system and increases the product qualification rate.

[0005] As an improvement of the present invention, the system further includes a positioning detection mechanism, which is set in the two heat exchange systems. The positioning detection mechanism includes an ultrasonic detector, which is set in the heat exchange system. The location and area of ​​the fouling inside the heat exchange system are determined by the detection signal and diffraction signal emitted by the ultrasonic detector. The location of the fouling is obtained by calculation by the calculation module based on the detection signal generated by the ultrasonic detector, and the area of ​​the fouling is obtained by calculation by the calculation module based on the diffraction signal generated by the ultrasonic detector.

[0006] Based on the above technical solution, the size and location of dirt can be quickly detected by the positioning and detection mechanism in the heat exchange system, which facilitates timely cleaning of the heat exchange system through the cleaning system.

[0007] As an improvement of the present invention, the cleaning system includes a cleaning assembly and a cleaning pipeline. The cleaning assembly includes a high-pressure nozzle and a pump assembly. The cleaning assembly also includes a cleaning return pipeline connected to a filtration system. The filtration system includes a filter and a recovery tank.

[0008] Based on the above technical solution, the high-pressure nozzle is powered by a pump assembly, and the heat exchange cylinder is cleaned by the pump assembly through the recovery tank using cleaning liquid. The filter can be a multi-layer filter screen, which can filter the cleaned liquid from the cleaning system for subsequent use.

[0009] As an improvement of the present invention, the heat exchange system includes a heat exchange cylinder, which is provided with heat exchange tubes and a heat exchange medium, and the top of the heat exchange tubes is connected to the cleaning component of the cleaning system.

[0010] As an improvement of the present invention, both the primary heat exchange system and the secondary heat exchange system are connected to a cleaning system, the two cleaning systems are connected to a filtration system, the filtration system is connected to a recovery tank, and the recovery tank is then connected to the two cleaning systems respectively.

[0011] As an improvement of the present invention, the evaporation system includes an evaporation cylinder, and a gas equalization plate is provided on the top of the evaporation cylinder. The gas equalization plate is provided with gas equalization holes, and the gas equalization plate and gas equalization holes improve the evaporation efficiency of the evaporation cylinder.

[0012] As an improvement of the present invention, the inlet of the heat exchange cylinder is provided with a flow equalization component, which includes an acceleration component, a flow equalization plate and a deceleration component. The acceleration component, the flow equalization plate and the deceleration component are arranged sequentially along the liquid inlet direction. The acceleration component includes several sets of symmetrically inclined acceleration plates, and the deceleration component includes a set of deceleration plates arranged in a dispersed manner. The distance between the deceleration plates gradually increases along the liquid inlet direction.

[0013] Based on the above technical solution, in the flow equalization component, the speed-increasing component can make the heat exchange medium pass through the flow equalization plate at a block speed, which balances the deceleration of the heat exchange medium when passing through the flow equalization plate. After passing through the flow equalization, the speed of the heat exchange medium is reduced and dispersed under the deceleration effect of the speed-reducing plate, which fully contacts the heat exchange tube and improves the heat exchange efficiency.

[0014] Compared to existing technologies, the beneficial effects of this invention are as follows: The two-stage evaporation and condensation treatment system designed in this invention improves the overall adjustability of the system by setting heat exchange enhancement pipes in the primary and secondary heat exchange systems. When the heat exchange efficiency of one of the heat exchange systems decreases, including due to fouling, this can be detected by the positioning detection mechanism. The valves between them can be opened and the valves of the primary heat exchange system and the primary evaporation system can be closed. The material to be processed will pass through the primary and secondary heat exchange systems in sequence, improving the overall operating efficiency of the system and increasing the product qualification rate. The speed-increasing component allows the heat exchange medium to pass through the flow equalization plate at high speed, balancing the deceleration of the heat exchange medium when passing through the flow equalization plate. After passing through the flow equalization plate, the speed of the heat exchange medium is reduced and dispersed under the deceleration effect of the speed-increasing plate, fully contacting the heat exchange tubes and improving the heat exchange efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the system connection in this embodiment;

[0016] Figure 2 This is a schematic diagram of the heat exchange system and evaporation system in this embodiment;

[0017] Figure 3 This is an example. Figure 2 Enlarged view of point A in the middle.

[0018] List of labels in the attached diagram: 1-Liquid inlet system, 2-Primary heat exchange system, 3-Secondary heat exchange system, 4-Primary evaporation system, 5-Secondary evaporation system, 6-Primary condensation system, 7-Secondary condensation system, 8-Liquid outlet system, 9-Ultrasonic detector, 10-Cleaning pipe, 11-High-pressure nozzle, 12-Pump assembly, 13-Cleaning return pipe, 14-Multi-layer filter, 15-Heat exchange cylinder, 16-Heat exchange tube, 17-Heat exchange medium, 18-Cleaning system, 19-Evaporation cylinder, 20-Gas distribution plate, 21-Gas distribution hole, 22-Speed ​​increaser assembly, 23-Flow distribution plate, 24-Speed ​​decreaser assembly, 25-Heat exchange enhancement pipe. Implementation

[0019] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0020] Example: Figures 1 to 3As shown, a multi-stage evaporation and condensation treatment system includes a liquid inlet system 1, a primary heat exchange system 2, a secondary heat exchange system 3, a primary evaporation system 4, a secondary evaporation system 5, a primary condensation system 6, a secondary condensation system 7, and a liquid outlet system 8. The liquid inlet system 1 connects to two heat exchange systems, which in turn connect to the evaporation system and the condensation system, leading to the liquid outlet system 8. The system also includes a cleaning system connected to the primary heat exchange system 2 and the secondary heat exchange system 3. The primary and secondary heat exchange systems 2 and 3 are equipped with heat exchange enhancement pipes 25, and each structure is equipped with a valve. The two sets of evaporation and condensation treatment systems designed in this invention improve the overall adjustability of the system by setting heat exchange enhancement pipes 25 in the primary and secondary heat exchange systems 2 and 3. When the heat exchange efficiency of one of the heat exchange systems decreases, including due to fouling, this can be detected by a positioning detection mechanism. The valves between the two systems can be opened and the valves of the primary heat exchange system 2 and the primary evaporation system 4 can be closed. The material to be treated will then pass through the primary and secondary heat exchange systems in sequence, improving the overall operating efficiency of the system and increasing the product qualification rate.

[0021] Furthermore, the system also includes a positioning and detection mechanism, which is set within the two heat exchange systems. The positioning and detection mechanism includes an ultrasonic detector 9, which is located within the heat exchange system. The ultrasonic detector 9 determines the location and area of ​​fouling inside the heat exchange system by using the detection signal and diffraction signal emitted by the ultrasonic detector 9. The location of fouling is calculated by the calculation module based on the detection signal generated by the ultrasonic detector 9, and the area of ​​fouling is calculated by the calculation module based on the diffraction signal generated by the ultrasonic detector 9. The positioning and detection mechanism within the heat exchange system can quickly detect the size and location of fouling, facilitating timely cleaning of the heat exchange system by the cleaning system 18.

[0022] Furthermore, the cleaning system includes a cleaning assembly and a cleaning pipeline 10. The cleaning assembly includes a high-pressure nozzle 11 and a pump assembly 12. The cleaning assembly also includes a cleaning return pipeline 13, which is connected to a filtration system. The filtration system includes a filter and a recovery tank. The high-pressure nozzle 11 is powered by the pump assembly 12. The cleaning liquid is pumped through the recovery tank and then through the pump assembly 12 to clean the heat exchange cylinder 15. The filter can be a multi-layer filter screen 14, which can filter the cleaned liquid from the cleaning system 18 for subsequent reuse.

[0023] Furthermore, the heat exchange system includes a heat exchange cylinder 15, which is provided with a heat exchange tube 16 and a heat exchange medium 17. The top of the heat exchange tube 16 is connected to the cleaning component of the cleaning system 18.

[0024] Furthermore, both the primary heat exchange system 2 and the secondary heat exchange system are connected to a cleaning system 18. The two cleaning systems 18 are connected to a filtration system, which is connected to a recovery tank. The recovery tank is then connected to the two cleaning systems 18 respectively.

[0025] Furthermore, the evaporation system includes an evaporation cylinder 19, and a gas distribution plate 20 is provided on the top of the evaporation cylinder 19. Gas distribution holes 21 are distributed on the gas distribution plate 20. The gas distribution plate 20 and the gas distribution holes 21 improve the evaporation efficiency of the evaporation cylinder 19.

[0026] Furthermore, the inlet of the heat exchange tube 15 is equipped with a flow equalization component, which includes an acceleration component 22, a flow equalization plate 23, and a deceleration component 24. The acceleration component 22, the flow equalization plate 23, and the deceleration component 24 are arranged sequentially along the liquid inlet direction. The acceleration component 22 includes several sets of symmetrically inclined acceleration plates, and the deceleration component 24 includes a set of dispersed deceleration plates. The distance between the deceleration plates gradually increases along the liquid inlet direction. In the flow equalization component, the acceleration component 22 allows the heat exchange medium 17 to pass through the flow equalization plate 23 at high speed, balancing the deceleration of the heat exchange medium 17 when passing through the flow equalization plate 23. After the flow equalization, the speed of the heat exchange medium 17 is reduced and dispersed under the deceleration effect of the deceleration plate, fully contacting the heat exchange tube 16 and improving the heat exchange efficiency.

[0027] It should be noted that the above content merely illustrates the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. For those skilled in the art, various improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A multi-stage evaporation condensation treatment system, characterized by, The system comprises a liquid inlet system (1), a first heat exchange system (2), a second heat exchange system (3), a first evaporation system (4), a second evaporation system (5), a first condensation system (6), a second condensation system (7), and a liquid outlet system (8). The liquid inlet system (1) is connected to the two heat exchange systems, and the two heat exchange systems are sequentially connected to the evaporation system and the condensation system to the liquid outlet system (8). The system further comprises a cleaning system connected to the first heat exchange system (2) and the second heat exchange system (3). The system further comprises a positioning detection mechanism arranged in the two heat exchange systems. The positioning detection mechanism comprises an ultrasonic detector (9) arranged in the heat exchange system. The position and area of the dirt inside the heat exchange system are determined by the detection signals and diffraction signals emitted by the ultrasonic detector (9). The position of the dirt is calculated by the detection signals generated by the ultrasonic detector (9) after passing through the calculation module. The area of the dirt is calculated by the diffraction signals generated by the ultrasonic detector (9) after passing through the calculation module. The cleaning system comprises a cleaning assembly and a cleaning pipeline (10). The cleaning assembly comprises a high-pressure spray head (11) and a pump assembly (12). The cleaning assembly further comprises a cleaning return pipeline (13) connected to a filtering system. The filtering system comprises a filter and a recovery tank. The heat exchange system comprises a heat exchange cylinder (15) provided with a heat exchange pipe (16) and a heat exchange medium (17). The top of the heat exchange pipe (16) is connected to a cleaning assembly of a cleaning system (18). The first heat exchange system (2) and the second heat exchange system are both connected to the cleaning system (18). The two cleaning systems (18) are connected to the filtering system, which is connected to the recovery tank. The recovery tank is connected to the two cleaning systems (18) respectively. The evaporation system comprises an evaporation cylinder (19) provided with an air equalizing plate (20) at the top. The air equalizing plate (20) is provided with air equalizing holes (21). The liquid inlet of the heat exchange cylinder (15) is provided with a flow equalizing assembly. The flow equalizing assembly comprises a speed increasing assembly (22), a flow equalizing plate (23), and a speed reducing assembly (24). The speed increasing assembly (22), the flow equalizing plate (23), and the speed reducing assembly (24) are sequentially arranged along the liquid inlet direction. The speed increasing assembly (22) comprises a plurality of groups of symmetrically inclined speed increasing plates. The speed reducing assembly (24) comprises a group of speed reducing plates arranged in a scattered manner. The distance between the speed reducing plates gradually increases along the liquid inlet direction. The first heat exchange system (2) and the second heat exchange system are provided with heat exchange reinforcing pipelines (25).

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