Humidifying and dehumidifying salt-containing waste liquid concentration device and system

Abstract

The utility model discloses a humidifying and dehumidifying salt-containing waste liquid concentration device and system, belongs to the technical field of hot desalination, can solve the problems of promoting water vapor flow and improving concentration efficiency, and is technically characterized in that a spraying component of a humidifying bin sprays salt-containing waste liquid input into the humidifying bin from a circulating waste liquid inlet to form water vapor and salt-containing liquid drops; the interior of the humidifying bin is filled with the filler; a condensation component of the dehumidification bin condenses water vapor introduced into the dehumidification bin from a water vapor inlet of the first dehumidification bin to form water drop liquid, a connecting channel enables the water vapor to be introduced into the dehumidification bin from the interior of the humidification bin, and the fresh air supply component comprises an air supply pipeline and an air blowing component; the air supply pipeline is communicated with the interior of the humidifying bin through the first humidifying bin air supply inlet, and an air outlet of the air blowing component faces the first humidifying bin air supply inlet, so that the heating efficiency of the whole device is improved, the energy source is wide, and waste heat, waste steam, solar energy, wind energy, terrestrial heat and other low-grade heat sources in industrial production can be utilized for working.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal desalination, and particularly relates to a humidification and dehumidification saline waste liquid concentration device and a device cascade concentration system. Background Art

[0002] The waste liquid generated in industrial production has complex components, and direct discharge will cause environmental pollution, so it is necessary to treat the waste liquid in a reasonable way. Common methods for industrial waste liquid concentration and desalination include: multi-stage flash evaporation, reverse osmosis, multi-effect evaporation, electrodialysis, etc. Multi-stage flash evaporation uses reduced air pressure to flash evaporate the heated waste liquid, condense the steam into fresh water, and the concentrated waste liquid is flashed to the next stage. Multi-stage flash evaporation consumes a lot of energy and is not suitable for small production processes. The multi-effect evaporation device occupies a large area and has high investment costs. As the concentration of the waste liquid increases, the tendency to scale gradually increases, reducing the evaporation efficiency and causing corrosion to the inner wall of the device, which requires regular cleaning and maintenance. Both reverse osmosis and electrodialysis use the osmotic effect of the membrane to purify specific substances in the waste liquid under the condition of applying external energy. However, the use of membrane technology to purify waste liquid has high requirements for the original liquid. The scaling phenomenon that occurs during the purification process will greatly reduce the service life of the membrane and increase the operating cost.

[0003] Humidification and dehumidification desalination technology has certain practicality in waste liquid desalination. This method uses air as a carrier, circulates between the humidification chamber and the dehumidification chamber, and uses the saturated vapor pressure difference between hot air and cold air to bring out the water in the waste liquid and condense it into fresh water. The humidification and dehumidification salty waste liquid concentration device has the advantages of simple structure, low cost, and the use of low-grade heat sources.

[0004] However, in the prior art, since no air outlet device is used to supply air to the dehumidification chamber, water vapor is relied on to flow spontaneously from the humidification chamber to the dehumidification chamber, which reduces the flow efficiency and affects the concentration efficiency. Furthermore, in the prior art, the droplets of the entire saline waste liquid are not always heated to form water vapor during the dripping process, and the droplets of the saline waste liquid are slightly faster in dripping, which will affect the vaporization, resulting in insufficient reaction, affecting the generation of water vapor and reducing the concentration efficiency. Utility Model Content

[0005] In the first aspect, the utility model aims to solve the problem of promoting the flow of water vapor and improving the concentration efficiency.

[0006] According to some embodiments of the present application, the humidification and dehumidification salt-containing waste liquid concentration device includes:

[0007] The humidification chamber comprises an upper shell and a fresh air supply component, wherein the upper shell is provided with a first humidification chamber water vapor outlet;

[0008] The dehumidification chamber comprises a shell and a cooling member, wherein a first dehumidification chamber water vapor inlet is arranged on the upper portion of the shell;

[0009] A connecting passage connecting the water vapor outlet of the first humidification chamber and the water vapor inlet of the first dehumidification chamber;

[0010] Among them, the fresh air supply component of the humidification chamber includes an air supply duct and a blowing component, the air supply duct is connected with the interior of the humidification chamber through the first humidification chamber air supply inlet, and the air outlet of the blowing component faces the first humidification chamber air supply inlet.

[0011] According to the humidification and dehumidification salt-containing waste liquid concentration device in some embodiments of the present application, the humidification bin further includes a sieve plate, a lower shell, a filler and a spray component;

[0012] The upper shell forms a first cavity inside, the lower shell forms a second cavity inside, and the sieve plate separates the first cavity from the second cavity;

[0013] The upper shell is provided with a circulating waste liquid inlet, and the lower shell is provided with a circulating waste liquid discharge outlet;

[0014] The spraying member inputs the saline waste liquid into the first cavity through the circulating waste liquid inlet of the upper shell, forms water vapor and saline droplets through spraying, and the filler is filled in the first cavity of the upper shell;

[0015] Wherein, a third cavity is formed inside the shell of the dehumidification chamber;

[0016] The lower part of the shell is provided with a first dehumidification chamber water vapor outlet and a water droplet discharge outlet;

[0017] The cooling member cools the water vapor introduced into the third cavity through the water vapor inlet at the upper portion of the shell to form water droplets;

[0018] Wherein, the connecting channel connects the first humidification chamber water vapor outlet of the upper shell of the humidification chamber and the first dehumidification chamber water vapor inlet on the upper part of the shell of the dehumidification chamber, so that the water vapor passes from the interior of the humidification chamber into the interior of the dehumidification chamber.

[0019] According to the humidification and dehumidification salt-containing waste liquid concentration device in some embodiments of the present application, the humidification bin further includes an auxiliary heater and a baffle, the auxiliary heater includes a plurality of groups of resistance wires radially and parallelly arranged in the humidification bin, the resistance wires are bent along the dripping stroke direction of the water droplets and arranged inside the humidification bin, and gaps are arranged between each group of resistance wires to allow the water droplets to pass through; at least two of the baffles are spaced apart inside the humidification bin along the dripping stroke direction of the salt-containing liquid droplets;

[0020] Among them, the cooling component of the dehumidification bin includes a plurality of groups of cooling pipes radially and parallelly arranged in the dehumidification bin, the cooling pipes are bent and arranged inside the dehumidification bin along the dripping direction of the salt-containing liquid droplets, and gaps are arranged between each group of cooling pipes to allow the water droplets to pass through, wherein the cooling pipes include a cooling water inlet and a cooling water outlet.

[0021] According to the humidification and dehumidification salt-containing waste liquid concentration device in some embodiments of the present application, the auxiliary heater of the dehumidification bin also includes an outer shell, and the outer shell is embedded in a shell connected to the humidification bin, so that part of the outer shell is arranged outside the humidification bin, and part of the outer shell is arranged inside the humidification bin, and the power supply line of the resistance wire passes through the outer shell into the interior of the humidification bin and is connected to the resistance wire, and the end of the resistance wire is fixed to the outer shell inside the humidification bin, so that the resistance wire is fixed inside the humidification bin.

[0022] According to the humidification and dehumidification device for concentrating saline waste liquid in some embodiments of the present application, the dehumidification bin also includes a baffle and a block, the block is connected to the shell of the dehumidification bin, the baffle is semicircular in shape and is connected to the block, and the arc directions of two adjacent baffles separated by a certain space along the dripping direction of the saline liquid droplets are in opposite directions.

[0023] According to the humidification and dehumidification salt-containing waste liquid concentration device in some embodiments of the present application, the fresh air supply component of the dehumidification bin also includes an air preheater, and the air preheater is arranged in the air supply duct and upstream of the blowing component.

[0024] On the second aspect, in order to solve the problem that the humidification chambers of the humidification and dehumidification salt-containing waste liquid concentration device at different levels are in different temperature ranges, different humidification chambers can obtain different types of salts that are sensitive to precipitation temperature.

[0025] According to some embodiments of the present application, the humidification and dehumidification saline waste liquid concentration system includes a concentration device, wherein the concentration device is configured as a first concentration device arranged at the head end, at least one second concentration device arranged in the middle section, and a third concentration device arranged at the end, wherein the concentration device is any one of the concentration devices;

[0026] The upper shell of the humidification chamber of the second concentrating device is also provided with a second humidification chamber water vapor outlet, and the lower shell of the humidification chamber is also provided with a second humidification chamber air supply inlet.

[0027] The upper part of the shell of the dehumidification chamber of the second concentrating device is also provided with a second dehumidification chamber water vapor inlet, and the lower part of the shell of the dehumidification chamber is also provided with a second dehumidification chamber water vapor outlet;

[0028] The upper shell of the humidification chamber of the third concentrating device is also provided with a second humidification chamber water vapor outlet, and the lower shell of the humidification chamber is also provided with a second humidification chamber air supply inlet.

[0029] The upper part of the shell of the dehumidification chamber of the third concentrating device is also provided with a second dehumidification chamber water vapor inlet, and the lower part of the shell of the dehumidification chamber is also provided with a second dehumidification chamber water vapor outlet;

[0030] in:

[0031] The connecting channel of the first concentrating device is connected to the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber and the first dehumidifying chamber water vapor inlet of the upper shell of the dehumidifying chamber, so that the water vapor is discharged from the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber to the first dehumidifying chamber water vapor inlet of the upper shell of the dehumidifying chamber, so as to enter the third cavity of the shell of the dehumidifying chamber;

[0032] The circulating waste liquid inlet of the upper shell of the humidification bin of the subsequent-stage concentrating device is connected to the circulating waste liquid discharge outlet of the lower shell of the humidification bin of the previous-stage concentrating device, so that the salt-containing waste liquid discharged from the circulating waste liquid discharge outlet of the humidification bin of the previous-stage concentrating device passes into the circulating waste liquid inlet of the humidification bin of the subsequent-stage concentrating device to enter the first cavity of the upper shell of the humidification bin of the subsequent-stage concentrating device;

[0033] The cooling water outlet of the cooling member in the third cavity of the dehumidification bin of the subsequent concentrating device is communicated with the cooling water inlet of the cooling member in the third cavity of the dehumidification bin of the previous concentrating device, so that the water output from the cooling water outlet of the cooling water member in the third cavity of the dehumidification bin of the subsequent concentrating device passes into the cooling water inlet of the cooling member in the third cavity of the dehumidification bin of the previous concentrating device, so as to enter the cooling member in the third cavity of the dehumidification bin of the previous concentrating device, and is used to condense the water vapor in the third cavity;

[0034] The second dehumidification chamber water vapor inlet on the upper part of the shell of the dehumidification chamber of the subsequent stage concentrating device is connected to the first dehumidification chamber water vapor outlet on the lower part of the shell of the dehumidification chamber of the previous stage concentrating device, so that the water vapor discharged from the first dehumidification chamber water vapor outlet on the lower part of the shell of the dehumidification chamber of the previous stage concentrating device passes into the second dehumidification chamber water vapor inlet on the upper part of the shell of the dehumidification chamber of the subsequent stage concentrating device, so as to enter the third cavity of the shell of the dehumidification chamber of the subsequent stage concentrating device;

[0035] The second humidification chamber water vapor outlet of the upper shell of the humidification chamber of the subsequent-stage concentrator is connected to the first humidification chamber air supply inlet of the lower shell of the humidification chamber of the previous-stage concentrator, so that the water vapor discharged from the second humidification chamber water vapor outlet of the upper shell of the humidification chamber of the subsequent-stage concentrator passes into the air supply inlet of the first humidification chamber lower shell of the humidification chamber of the previous-stage concentrator, so as to enter the second cavity of the lower shell of the humidification chamber of the previous-stage concentrator, and further passes into the first cavity of the upper shell of the humidification chamber of the previous-stage concentrator;

[0036] The connecting channel of the second concentrating device is connected to the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber and the first dehumidifying chamber water vapor inlet of the upper shell of the dehumidifying chamber, so that the water vapor is discharged from the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber to the first dehumidifying chamber water vapor inlet of the upper shell of the dehumidifying chamber, so as to enter the third cavity of the shell of the dehumidifying chamber;

[0037] The second dehumidification bin water vapor outlet at the lower part of the shell of the dehumidification bin of the second concentrating device is connected to the second humidification bin air supply inlet of the lower shell of the humidification bin through an air supply pipe, and a blowing component is provided in the air supply pipe, and the air outlet of the blowing component in the air supply pipe faces the second humidification bin air supply inlet of the lower shell of the humidification bin, so that the water vapor discharged from the second dehumidification bin water vapor outlet at the lower part of the shell of the dehumidification bin of the second concentrating device passes into the second humidification bin air supply inlet of the lower shell of the humidification bin, so as to enter the second cavity of the lower shell of the humidification bin, and further passes into the first cavity of the upper shell of the humidification bin;

[0038] The connecting channel of the third concentrating device is connected to the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber and the first dehumidifying chamber water vapor inlet on the upper part of the shell of the dehumidifying chamber, so that the water vapor is discharged from the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber to the first dehumidifying chamber water vapor inlet on the upper part of the shell of the dehumidifying chamber, so as to enter the third cavity of the shell of the dehumidifying chamber;

[0039] The second dehumidification bin water vapor outlet at the lower part of the shell of the dehumidification bin of the third concentrating device is connected to the second humidification bin air supply inlet of the lower shell of the humidification bin via an air supply pipe, in which a blowing component is arranged, and an air outlet of the blowing component in the air supply pipe faces the second humidification bin air supply inlet of the lower shell of the humidification bin, so that the water vapor discharged from the second dehumidification bin water vapor outlet at the lower part of the shell of the dehumidification bin of the third concentrating device passes into the second humidification bin air supply inlet of the lower shell of the humidification bin, so as to enter the second cavity of the lower shell of the humidification bin, and further passes into the first cavity of the upper shell of the humidification bin.

[0040] According to some embodiments of the present application, the humidification and dehumidification saline waste liquid concentration system further includes a first heat exchanger, a circulation tank, a circulating waste liquid pump, and a second heat exchanger;

[0041] The cooling water inlet of the cooling member in the third cavity of the shell of the dehumidification bin of the third concentrating device is connected to external cooling water, the cooling water outlet of the cooling member in the third cavity of the shell of the dehumidification bin of the first concentrating device is connected to the primary side of the first heat exchanger, and the output of the primary side of the first heat exchanger is connected to the external cooling water;

[0042] The circulating waste liquid discharge outlet of the lower shell of the dehumidification bin of the third concentrating device is connected to the secondary side of the first heat exchanger, so that the circulating waste liquid discharged from the circulating waste liquid discharge outlet of the lower shell of the dehumidification bin of the third concentrating device passes into the secondary side of the first heat exchanger, and the output of the secondary side of the first heat exchanger is connected to the circulation pool, and the exogenous salt-containing waste liquid is connected to the circulation pool through a pipeline;

[0043] The salt-containing waste liquid in the circulation pool and the external salt-containing waste liquid are extracted by the circulating waste liquid pump through a pipeline and output to the first side of the second heat exchanger. The first side of the second heat exchanger is connected to the circulating waste liquid inlet of the upper shell of the humidification tank of the first concentrating device, and the second side of the second heat exchanger is the heat source medium flow side.

[0044] On the third aspect, the utility model is to solve the problem of reducing scaling in the device.

[0045] According to some embodiments of the present application, the humidification and dehumidification salt-containing waste liquid concentration system includes a concentration device, wherein the concentration device is configured as at least two, and the concentration device is any one of the concentration devices described;

[0046] in:

[0047] The circulating waste liquid inlet of the upper shell of the humidification bin of the concentrating device is connected in parallel to the saline waste liquid inlet pipe, so that the saline waste liquid is passed in parallel to the circulating waste liquid inlet of the upper shell of the humidification bin of the concentrating device, and then enters the first cavity of the upper shell of the humidification bin in parallel;

[0048] The connecting channel of the concentrating device is connected to the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber and the first dehumidifying chamber water vapor inlet of the upper shell of the dehumidifying chamber, so that the water vapor is discharged from the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber to the first dehumidifying chamber water vapor inlet of the upper shell of the dehumidifying chamber, so as to enter the third cavity of the shell of the dehumidifying chamber;

[0049] The circulating waste liquid discharge outlet of the lower shell of the humidifying bin of the concentrating device is connected in parallel to the first liquid discharge pipe, so that the salt-containing liquid droplets sprayed and dripped from the first cavity of the upper shell fall into the second cavity of the lower shell, and are discharged in parallel from the circulating waste liquid discharge outlet of the lower shell of the humidifying bin;

[0050] The cooling water inlet of the cooling member in the third cavity of the shell of the dehumidification bin of the concentrating device is connected in parallel to the external cooling water, so that the external cooling water is connected in parallel to the cooling water inlet of the cooling member in the third cavity of the shell of the dehumidification bin to enter the cooling member for condensing the water vapor in the third cavity;

[0051] The cooling water outlet of the cooling member of the dehumidification bin of the concentrator is connected in parallel to the second liquid discharge pipe, so that the cooling water that enters the cooling member and is used to liquefy the water vapor in the third cavity is discharged from the cooling water outlet to be connected in parallel to the second liquid discharge pipe;

[0052] The first dehumidification bin water vapor outlet of the lower shell of the dehumidification bin of the concentrating device and the first humidification bin air supply inlet of the lower shell of the humidification bin are connected through an air supply duct, and a blowing component is arranged in the air supply duct, and the air outlet of the blowing component in the air supply duct faces the first humidification bin air supply inlet of the humidification bin, so that the water vapor in the dehumidification bin passes from the first dehumidification bin water vapor outlet of the lower shell of the dehumidification bin to the first humidification bin air supply inlet of the lower shell of the humidification bin, so as to enter the second cavity of the lower shell of the humidification bin and further pass into the first cavity of the upper shell of the humidification bin.

[0053] According to some embodiments of the present application, the humidification and dehumidification saline waste liquid concentration system further includes a centrifugal crystallizer, a circulation pool, a circulating waste liquid pump, a second heat exchanger, and a heat source medium;

[0054] The saline waste liquid discharged from the circulating waste liquid discharge outlet of the lower shell of the dehumidification bin of the concentrator to the first liquid discharge pipe is connected to the centrifugal crystallizer through a pipeline, the centrifugal crystallizer is connected to the circulation pool through a pipeline, and the exogenous saline waste liquid is connected to the circulation pool through a pipeline;

[0055] The circulating waste liquid in the circulation pool and the external salt-containing waste liquid are extracted by the circulating waste liquid pump through a pipeline and output to the first side of the second heat exchanger. The first side of the second heat exchanger is connected in parallel to the circulating waste liquid inlet of the upper shell of the humidification bin of each concentrating device. The second side of the second heat exchanger is the heat source medium flow side.

[0056] Compared with the prior art, the utility model has the following beneficial effects:

[0057] In the first aspect, the air outlet of the blowing member supplies fresh air toward the air supply inlet of the first humidification chamber, which can promote the flow of water vapor to the dehumidification chamber and improve the concentration efficiency. Furthermore, the air preheater is arranged in the air supply duct, which can simultaneously benefit the generation and flow of water vapor and improve the concentration efficiency.

[0058] On the second aspect, gaps are set between each group of resistance wires to allow saline droplets to pass through, and the resistance wires are vertically bent along the dripping stroke of the saline droplets and arranged inside the humidification chamber, so that the dripping droplets in the humidification chamber are always in a heated state, thereby increasing the amount of water vapor generated, and the cooling pipes are vertically bent along the dripping stroke of the saline droplets and arranged inside the dehumidification chamber, and gaps are set between each group of cooling pipes to allow water droplets to pass through, so that the falling water vapor in the dehumidification chamber is always in a cooling state, thereby increasing the amount of fresh water generated.

[0059] On the third aspect, the concentration system of the utility model is composed of a multi-stage humidification and dehumidification salty waste liquid concentration device, which can freely increase or decrease the number of stages and is suitable for production of various scales. The humidification and dehumidification salty waste liquid concentration devices at each stage can be connected in series or in parallel. In the first direction of the third aspect, the utility model can realize that the humidification bins of the humidification and dehumidification salty waste liquid concentration devices at different levels are in different temperature ranges through the series mode, and different humidification bins can obtain different types of salts that are sensitive to precipitation temperature. That is, the temperatures between the humidification and dehumidification salty waste liquid concentration devices at each stage of the utility model are different. Different salts or volatile substances have different solubilities at different temperatures, and the separation of different salts and different volatile substances is achieved in the devices at each stage. Furthermore, waste heat recovery can be performed and the waste heat can be involved in the circulation. The utility model effectively recovers the waste heat in the cooling water by exchanging heat between the low-temperature waste liquid after circulation and the high-temperature cooling water, thereby improving energy utilization. In the second direction of the third aspect, the utility model focuses on the desalination function of the waste liquid through a parallel mode, and the concentrated waste liquid is passed into a centrifugal crystallizer and crystallized outside the device to reduce scaling inside the device.

[0060] In the fourth aspect, an internal auxiliary circulation can be arranged between the humidification chamber and the dehumidification chamber of the utility model. During the circulation process of the main device, the intermediate-stage humidification and dehumidification salt-containing waste liquid concentration device extracts a part of the air for internal circulation, making full use of the humidified air, thereby effectively improving the humidification and dehumidification efficiency and energy utilization rate.

[0061] In the fifth aspect, the utility model provides an auxiliary heater in the humidification chamber to continuously heat the circulating waste liquid and air. An air preheater is added to the cold air inlet, and the air is passed into the humidification chamber after the waste heat is removed, thereby improving the overall heating efficiency of the device.

[0062] In the sixth aspect, it has the characteristics of modular multi-level structure, waste heat recovery, and the use of low-grade heat sources to concentrate saline waste liquid. The energy sources of the device and equipment are extensive, and it can work by using waste heat and waste steam in industrial production, or low-grade heat sources such as solar energy, wind energy, and geothermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a schematic diagram of the humidification chamber and the dehumidification chamber.

[0064] Figure 2 It is a schematic diagram of a series multi-stage humidification and dehumidification salt-containing waste liquid concentration system.

[0065] Figure 3 This is a schematic diagram of the parallel multi-stage humidification and dehumidification salt-containing waste liquid concentration system.

[0066] Figure 4 This is a schematic diagram of the spray dehumidification chamber.

[0067] Figure 5 It is a process schematic diagram of the monomer concentration device in the parallel concentration system.

[0068] In the figure: 1. humidification chamber, 2. circulating waste liquid inlet, 3. sprayer, 4. spray port, 5. sprayer bracket, 6. sprayer sieve plate, 7. auxiliary heater, 8. baffle, 9. upper shell A, 10. block, 11. packing, 12. sieve plate, 13. overflow port, 14. lower shell A, 15. circulating waste liquid discharge outlet, 16. fan, 17. air preheater, 18. water drop discharge outlet, 19. lower shell B, 20. upper shell B, 21. cooling water inlet, 22. cooling water outlet, 23. Cooling pipe, 23. Cooling water outlet, 24. Dehumidification chamber, 25. Heat source, 26. Heating heat exchanger, 27. Circulating waste liquid pump, 28. Waste liquid stock, 29. Circulating pool, 30. Waste heat recovery heat exchanger, 31. Cooling water pump, 32. Circulating cooling water, 33. Five-stage humidification and dehumidification saline waste liquid concentration device, 34. Four-stage humidification and dehumidification saline waste liquid concentration device, 35. Three-stage humidification and dehumidification saline waste liquid concentration device, 36. Two-stage humidification and dehumidification saline waste liquid concentration device, 37. One-stage humidification and dehumidification Salt-containing waste liquid concentration device, 38. Centrifugal crystallizer, 39. Sprinkler B, 40. Block B, 41. Baffle B, 42. Filler B, 43. Heater circulating waste liquid outlet temperature, 44. Heater waste liquid inlet temperature, 45. Heater waste liquid outlet temperature, 46. Heater circulating waste liquid inlet temperature, 47. Circulating waste liquid flow rate, 48. Waste liquid raw liquid temperature, 49. Circulating pool temperature, 50. Circulating waste liquid inlet temperature, 51. Wind speed, 52. Cold air temperature, 53. Cooling water inlet Inlet temperature, 54. Cooling water flow rate, 55. Cooling water outlet temperature, 56. Hot air temperature, 57. Water vapor outlet of the first humidification chamber, 58. Water vapor inlet of the first dehumidification chamber, 59. Water vapor outlet of the first dehumidification chamber, 60. Connecting channel, 61. Air supply duct, 62. Air supply inlet of the first humidification chamber, 63. Water vapor outlet of the second humidification chamber, 64. Air supply inlet of the second humidification chamber, 65. Water vapor inlet of the second dehumidification chamber, 66. Water vapor outlet of the second dehumidification chamber, 67. Air supply duct. DETAILED DESCRIPTION

[0069] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be noted that this embodiment is only a detailed implementation plan and specific operation process based on the technical solution of the present invention, and is not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0070] The utility model provides a multi-stage humidification and dehumidification salt-containing waste liquid concentration device and system, and the system is formed by a plurality of devices in cascade. A plurality of groups of humidification and dehumidification salt-containing waste liquid concentration devices are cascaded to form a multi-stage humidification and dehumidification structure, and the number of stages can be increased or decreased according to the working conditions. By connecting the devices in different ways, different functions can be realized. For example, the series connection can realize waste heat recovery, and the parallel connection can reduce the occurrence of scaling in the device. In addition, the utility model has a wide range of energy sources, and can utilize low-grade heat sources including industrial waste heat and solar energy.

[0071] Example 1: Figure 1 and Figure 2 In this embodiment, in order to realize waste heat recovery during the operation of the device and improve energy utilization, a multi-stage humidification and dehumidification salt-containing waste liquid concentration device is connected in series to form a cascade concentration system, such as Figure 2 As shown, the system includes: a heat source 25, a heating heat exchanger 26, a circulating waste liquid pump 27, a waste liquid raw liquid 28, a circulating pool 29, a waste heat recovery heat exchanger 30, a cooling water pump 31, circulating cooling water 32, a first-stage humidification and dehumidification saline waste liquid concentrating device 33, a second-stage humidification and dehumidification saline waste liquid concentrating device 34, a third-stage humidification and dehumidification saline waste liquid concentrating device 35, a fourth-stage humidification and dehumidification saline waste liquid concentrating device 36, and a fifth-stage humidification and dehumidification saline waste liquid concentrating device 37.

[0072] The humidification and dehumidification salt-containing waste liquid concentration device at each level includes: a humidification chamber 1 and a dehumidification chamber 24.

[0073] The original waste liquid is transported to the circulation pool 29 through a pipeline for sufficient mixing. The circulating waste liquid in the circulation pool 29 is transported to the heating heat exchanger 26 through the circulating waste liquid pump 27 for heat exchange with the heat source. The heated circulating waste liquid is transported to the humidification bin 1 of the primary humidification and dehumidification salt-containing waste liquid concentration device 33.

[0074] The cooling water is transported to the dehumidification chamber 24 of the five-stage humidification and dehumidification salt-containing waste liquid concentration device 37 through the cooling water pump 31.

[0075] The circulating waste liquid discharged from the circulating waste liquid discharge outlet 15 of the humidifying bin 1 of the five-stage humidifying and dehumidifying saline waste liquid concentrator 37 and the cooling water discharged from the dehumidifying bin 24 of the first-stage humidifying and dehumidifying saline waste liquid concentrator 33 are transported to the waste heat recovery heat exchanger 30 through a pipeline. After sufficient heat exchange, the circulating waste water is input into the circulating pool 29 through a pipeline, and the cooling water is transported to the circulating cooling water.

[0076] Furthermore, an agitator may be added to the circulation tank 29 to speed up the mixing of new and old waste liquids and prevent scaling.

[0077] The humidification chamber includes: a circulating waste liquid inlet 2, a sprayer 3, a spray port 4, a sprayer bracket 5, a sieve plate A6, an auxiliary heater 7, a baffle 8, an upper shell A9, a block 10, a filler 11, a sieve plate B12, an overflow port 13, a lower shell A14, a circulating waste liquid discharge outlet 15, a fan 16, an air preheater 17, a cold air inlet, and a hot air outlet.

[0078] The circulating waste liquid inlet 2 is connected to the sprayer 3 through the through hole of the upper shell A9. The sprayer 3 is located at the upper part of the shell A9, and the inside of the sprayer 3 is a hollow structure. The spray port 4 is connected to the bottom plate of the sprayer 3. The auxiliary heater 7 extends into the center of the humidification chamber 1 through the through hole of the upper part of the upper shell A9 to heat the circulating waste liquid to be sprayed. The sprayer bracket 5 is connected to the upper shell A9 to support the sprayer 3. The sieve plate A6 is connected to the upper shell A9 to evenly disperse the spray solution. There are 4 baffles 8, each of which is semicircular and connected to the corresponding baffle 10. The adjacent two baffles 8 face opposite directions to increase the movement distance of the air inside the humidification chamber 1. The baffle 10 is connected to the upper shell A9 to support the baffle 8 and fix the position of the corresponding baffle. The sieve plate A6 is placed at the lower part of the upper shell A9, and the filler 11 is placed on the upper part of the sieve plate A6 and fills the upper shell A9. The baffle 8 and the sieve plate 10 jointly support the filler 11. The lower housing A14 is connected to the upper housing A9, and the circulating waste liquid discharge outlet is connected to the lower housing A14. The water vapor outlet 57 (hot air outlet) of the first humidification chamber is connected to the upper part of the upper housing A9, and the air supply inlet 62 (cold air inlet) of the first humidification chamber is connected to the lower part of the housing A. The fan is placed in the pipeline of the air supply inlet 62 (cold air inlet) of the first humidification chamber to drive the air circulation. The fan is placed in the air supply duct 61. In some examples, an air preheater can also be placed in the air supply duct 61 to preheat the extracted air, increase the inlet temperature, and increase the humidification efficiency.

[0079] Furthermore, the auxiliary heater 7 is installed in the humidification chamber 1 or in the hot air duct.

[0080] Furthermore, the baffle 8 structure includes a semicircular type or a spiral type.

[0081] Furthermore, the spray port 4 needs to be higher than the bottom plate of the sprayer 3, and the waste liquid accumulates to a certain height inside the sprayer 3 and then sprays downward, thereby ensuring the uniformity of the spray. The spray port 4 includes a rotary spray type or an overflow trough type.

[0082] Furthermore, the auxiliary heater 7 is arranged according to the air flow path, and effectively supplements the heating of the sprayed waste liquid during the humidification process.

[0083] Furthermore, the bottom plates of the lower shell A14 and the lower shell B19 are inclined downward toward the center, so that the collected waste liquid and fresh water can automatically flow into the circulating waste liquid discharge outlet and the water drop discharge outlet 18 respectively.

[0084] Furthermore, when waste liquid accumulates too much, it can be discharged through the overflow port 13 or extracted by a water pump to prevent the waste liquid from entering the air duct.

[0085] The dehumidification chamber includes: a water droplet discharge outlet 18 (fresh water outlet), a lower shell B19, an upper shell B20, a cooling water inlet 21, a cooling pipe 22, a cooling water outlet 23, a hot air inlet, and a cold air outlet. The cooling pipe 22 is placed inside the upper shell B20, the cooling water inlet is connected to the cooling pipe 22 through the through hole at the bottom of the upper shell B20, and the cooling water outlet 23 is connected to the cooling pipe 22 through the through hole at the top of the lower shell B20, and the cooling water flows from bottom to top. The water droplet discharge outlet 18 is connected to the lower shell B19. The first dehumidification chamber water vapor inlet 58 (hot air inlet) is connected to the upper part of the upper shell B20, and the first dehumidification chamber water vapor outlet 59 (cold air outlet) is connected to the lower part of the upper shell B20. The air passes through the dehumidification chamber 24 from top to bottom, the temperature is reduced, and the water vapor carried is condensed into fresh water.

[0086] Furthermore, the cooling pipes 22 are evenly arranged in the dehumidification chamber, and the cooling pipes 22 include coil type or plate type, etc., to increase the cooling area. Alternatively, the sprayer 3 is used instead of the cooling pipe, and in the process of spraying cooling water for cooling, the condensed water is mixed with the cooling water and finally discharged together.

[0087] Furthermore, the spraying devices in the humidification chamber 1 and the dehumidification chamber 24 include top spraying type, side wall spraying type, self-circulating multiple spraying type, etc.

[0088] Furthermore, the materials of the upper shell A9, the lower shell A14, the upper shell B20, the lower shell B19, the stopper 10, and the baffle 8 include corrosion-resistant materials such as PP, polyethylene, or glass fiber.

[0089] Furthermore, the shape of the filler includes arc, stepped ring or spherical, etc.

[0090] The first humidification bin air supply inlet 62 (cold air inlet) and the second humidification bin water vapor outlet 63 (hot air outlet) of the humidification bin of the first to five-stage humidification and dehumidification saline waste liquid concentrator are connected in sequence. The first dehumidification bin water vapor outlet 59 (cold air outlet) and the second dehumidification bin water vapor inlet 65 (hot air inlet) of the dehumidification bin of the first to five-stage humidification and dehumidification saline waste liquid concentrator are connected in sequence. In the first-stage humidification and dehumidification saline waste liquid concentrator, the first humidification bin water vapor outlet 57 (hot air outlet) of the humidification bin 1 is connected to the first dehumidification bin water vapor inlet 58 (hot air inlet) of the dehumidification bin 24. In the five-stage humidification and dehumidification saline waste liquid concentrator, the first humidification bin air supply inlet 62 (cold air inlet) of the humidification bin 24 is connected to the second dehumidification bin water vapor outlet 66 (cold air outlet) of the dehumidification bin 24. The humidification chamber and the dehumidification chamber in the intermediate stage humidification and dehumidification salty waste liquid concentration device are connected to each other through pipelines, and are provided with fans and air preheaters to assist circulation and improve circulation efficiency. The circulating waste liquid discharged from the last stage exchanges heat with the cooling water discharged from the first stage in the waste heat recovery heat exchanger 30.

[0091] Furthermore, in the multi-stage humidification and dehumidification salt-containing waste liquid concentration device, the temperatures between each stage are different from each other and have a certain temperature gradient.

[0092] Furthermore, the multi-stage humidification and dehumidification salt-containing waste liquid concentration device can utilize the temperature difference between each stage to separate substances in the waste liquid in each stage of the device, including salts with different solubility at different temperatures and substances with different volatility at different temperatures.

[0093] Furthermore, the multi-stage humidification and dehumidification saline waste liquid concentration device includes crystallization desalination inside one or several stages of the device.

[0094] Furthermore, the wind speed in the multi-stage humidification and dehumidification saline waste liquid concentration device may increase or decrease according to the temperature changes in the different stages of the device.

[0095] Furthermore, the connection modes between the humidification and dehumidification salty waste liquid concentration devices at each level include parallel connection, series connection, parallel connection and series connection, etc.

[0096] Furthermore, the concentrated waste liquid discharged from the multi-stage humidification and dehumidification salt-containing waste liquid concentration device is circulated again, including passing through the current stage and other stage humidification chambers, so as to enhance the heat and mass transfer between the waste liquid and the air.

[0097] Furthermore, when the air temperature flows inside the multi-stage humidification and dehumidification saline waste liquid concentration device, the temperature changes include gradually increasing, remaining unchanged, gradually decreasing, etc.

[0098] Furthermore, the humidification chamber 1 and the dehumidification chamber 24 inside the intermediate-stage humidification and dehumidification salt-containing waste liquid concentration device are interconnected through a pipeline, and are provided with a fan and an air preheater to assist the circulation and improve the circulation efficiency.

[0099] Furthermore, the waste liquid generated in the previous stage flows into the humidification chamber 1 of the next stage for concentration, and the cooling water of the next stage flows into the dehumidification chamber 24 of the previous stage.

[0100] Furthermore, the circulating waste liquid after waste heat recovery can be introduced into the centrifugal crystallizer 38 , and after crystallization and desalination, the supernatant liquid is transported back to the circulation pool 29 .

[0101] Furthermore, the waste heat recovery method includes utilizing the circulating wastewater and cooling water discharged from each stage for heat exchange within each stage, utilizing the circulating wastewater and cooling water after multi-stage treatment for unified heat exchange, etc.

[0102] Furthermore, the auxiliary heater 7 can select heat sources of different temperatures according to the different temperatures of each stage, including industrial waste heat such as waste steam and flue gas, solar energy, geothermal energy and other low-grade heat sources.

[0103] Furthermore, the flow directions of the air and cooling water include flowing from bottom to top, flowing from top to bottom, etc.

[0104] Furthermore, the relative movement between the air and the cooling water, and between the air and the spray waste liquid includes downstream and upstream flow.

[0105] Further, the air may be replaced with a gas in which water vapor has a greater diffusion coefficient, including helium, nitrogen, and the like.

[0106] The monitoring system includes: heating heat exchanger inlet and outlet temperatures, circulating waste liquid flow, waste liquid temperature, circulating pool temperature, circulating waste liquid inlet temperature, wind speed, cold air temperature, hot air temperature, cooling water flow, cooling water inlet temperature, and cooling water outlet temperature.

[0107] Furthermore, the parameters detected by the monitoring system include temperature, humidity, flow, TDS, concentration and other parameters related to liquid and air.

[0108] The above-mentioned multi-stage humidification and dehumidification saline waste liquid concentration system is used to concentrate the waste liquid, comprising the following steps:

[0109] The waste liquid is transported to the circulation pool 29 through the pipeline, and then transported to the heating heat exchanger 26 through the circulating waste liquid pump 27 to exchange heat with the heat source 25. The heated circulating waste liquid is transported to the humidification bin 1 of the first-stage humidification and dehumidification saline waste liquid concentration device 37 through the pipeline. The circulating waste liquid is sprayed into the humidification bin 1 through the sprayer 3, and collides with the filler 11 during the falling process to form fine droplets, which are evenly distributed throughout the humidification bin 1. The excess circulating waste liquid is concentrated at the bottom of the humidification bin 1 and discharged, and continues to be sprayed in the next-stage humidification and dehumidification saline waste liquid concentration device. The cooling water enters the dehumidification bin 24 of the five-stage humidification and dehumidification saline waste liquid concentration device 33 through the cooling water pump 31, flows from bottom to top in the cooling pipe 22, and the outflowing cooling water participates in the next-stage cooling. The fan drives the cold air to enter from the bottom of the humidification chamber 24. During the rising process, the cold air is gradually heated and humidified. The cold air passes through the humidification chamber 1 of the five-stage to the first-stage humidification and dehumidification salty waste liquid concentration device for heating and humidification. The hot and humid air enters from the top of the dehumidification chamber 1 and passes through the dehumidification chamber of the first-stage to the fifth-stage humidification and dehumidification salty waste liquid concentration device. During the descending process, the hot air gradually cools down, and the water vapor it carries is condensed into fresh water. The cooled and dehumidified air enters the next cycle. That is, the humidification bin 1 of the intermediate-stage humidification and dehumidification saline waste liquid concentrator transports water vapor to the dehumidification bin 24 through the connecting pipe 60, and the dehumidification bin 24 transports cold air to the humidification bin 1 through the air supply pipe between the second dehumidification bin water vapor outlet 66 and the second humidification bin air supply inlet 64, that is, the humidification and dehumidification saline waste liquid concentrator of the same level of the intermediate stage, its humidification bin 1 and the dehumidification bin 24 are still carrying out the above-mentioned small self-circulation, and the small self-circulation is in the above-mentioned large series circulation composed of the first to fifth stage humidification and dehumidification saline waste liquid concentrator of the utility model. The intermediate-stage humidification and dehumidification salt-containing waste liquid concentration device has an auxiliary circulation function. During the normal operation of the device, part of the air after cooling and dehumidification is extracted, preheated and passed into the humidification chamber 1 for heating and humidification, and part of the air after heating and humidification is passed into the dehumidification chamber 24 for cooling and condensation, which avoids the main device from being unable to completely humidify and dehumidify the air. As an auxiliary cycle, the circulation efficiency and energy utilization rate are improved. The circulating waste liquid discharged during the circulation process is input into the waste heat recovery heat exchanger together with the cooling water for heat exchange, realizing the recovery and utilization of waste heat. The circulating waste liquid after heat exchange is transported to the circulation pool 29, and the cooling water is transported to the circulating cooling water to participate in the next cycle.

[0110] Specifically, a humidification and dehumidification saline waste liquid concentration system comprises a concentration device, wherein the concentration device is configured as a first concentration device arranged at the head end, at least one second concentration device arranged in the middle section, and a third concentration device arranged at the end, wherein the concentration device is any one of the concentration devices;

[0111] The upper shell of the humidification chamber 1 of the second concentrating device is further provided with a second humidification chamber water vapor outlet 63, and the lower shell of the humidification chamber 1 is further provided with a second humidification chamber air supply inlet 64.

[0112] The upper part of the shell of the dehumidification chamber 24 of the second concentrating device is further provided with a second dehumidification chamber water vapor inlet 65, and the lower part of the shell of the dehumidification chamber 24 is further provided with a second dehumidification chamber water vapor outlet 66;

[0113] The upper shell of the humidification chamber 1 of the third concentrating device is further provided with a second humidification chamber water vapor outlet 63, and the lower shell of the humidification chamber 1 is further provided with a second humidification chamber air supply inlet 64.

[0114] The upper part of the shell of the dehumidification chamber 24 of the third concentrating device is further provided with a second dehumidification chamber water vapor inlet 65, and the lower part of the shell of the dehumidification chamber 24 is further provided with a second dehumidification chamber water vapor outlet 66;

[0115] in:

[0116] The connecting channel 60 of the first concentrating device connects the first humidifying chamber water vapor outlet 57 of the upper shell of the humidifying chamber 1 with the first dehumidifying chamber water vapor inlet 58 of the upper shell of the dehumidifying chamber 24, so that the water vapor is discharged from the first humidifying chamber water vapor outlet 57 of the upper shell of the humidifying chamber 1 to the first dehumidifying chamber water vapor inlet 58 of the upper shell of the dehumidifying chamber 24, so as to enter the third cavity of the shell of the dehumidifying chamber 24;

[0117] The circulating waste liquid inlet 2 of the upper shell of the humidifying bin 1 of the subsequent-stage concentrating device is connected to the circulating waste liquid discharge outlet 15 of the lower shell of the humidifying bin 1 of the previous-stage concentrating device, so that the saline waste liquid discharged from the circulating waste liquid discharge outlet 15 of the humidifying bin 1 of the previous-stage concentrating device passes into the circulating waste liquid inlet 2 of the humidifying bin 1 of the subsequent-stage concentrating device to enter the first cavity of the upper shell of the humidifying bin 1 of the subsequent-stage concentrating device;

[0118] The cooling water outlet 23 of the cooling member in the third cavity of the dehumidification chamber 24 of the subsequent-stage concentrator is communicated with the cooling water inlet 21 of the cooling member in the third cavity of the dehumidification chamber 24 of the previous-stage concentrator, so that the water outlet of the cooling water outlet 23 of the cooling water member in the third cavity of the dehumidification chamber 24 of the subsequent-stage concentrator passes into the cooling water inlet 21 of the cooling member in the third cavity of the dehumidification chamber 24 of the previous-stage concentrator, so as to enter the cooling member in the third cavity of the dehumidification chamber 24 of the previous-stage concentrator, and is used to condense the water vapor in the third cavity;

[0119] The second dehumidification chamber water vapor inlet 65 at the upper part of the shell of the dehumidification chamber 24 of the subsequent stage concentrating device is communicated with the first dehumidification chamber water vapor outlet 59 at the lower part of the shell of the dehumidification chamber 24 of the previous stage concentrating device, so that the water vapor discharged from the first dehumidification chamber water vapor outlet 59 at the lower part of the shell of the dehumidification chamber 24 of the previous stage concentrating device passes into the second dehumidification chamber water vapor inlet 65 at the upper part of the shell of the dehumidification chamber 24 of the subsequent stage concentrating device, so as to enter the third cavity of the shell of the dehumidification chamber 24 of the subsequent stage concentrating device;

[0120] The second humidification chamber water vapor outlet 63 of the upper shell of the humidification chamber 1 of the subsequent-stage concentrating device is communicated with the first humidification chamber air supply inlet 62 of the lower shell of the humidification chamber 1 of the previous-stage concentrating device, so that the water vapor discharged from the second humidification chamber water vapor outlet 63 of the upper shell of the humidification chamber 1 of the subsequent-stage concentrating device passes into the air supply inlet 62 of the lower shell of the first humidification chamber of the humidification chamber 1 of the previous-stage concentrating device, so as to enter the second cavity of the lower shell of the humidification chamber 1 of the previous-stage concentrating device, and further passes into the first cavity of the upper shell of the humidification chamber 1 of the previous-stage concentrating device;

[0121] The connecting channel 60 of the second concentrating device is connected to the first humidifying chamber water vapor outlet 57 of the upper shell of the humidifying chamber 1 and the first dehumidifying chamber water vapor inlet 58 of the upper shell of the dehumidifying chamber 24, so that the water vapor is discharged from the first humidifying chamber water vapor outlet 57 of the upper shell of the humidifying chamber 1 to the first dehumidifying chamber water vapor inlet 58 of the upper shell of the dehumidifying chamber 24, so as to enter the third cavity of the shell of the dehumidifying chamber 24;

[0122] The second dehumidification chamber water vapor outlet 66 at the lower part of the shell of the dehumidification chamber 24 of the second concentrating device is connected to the second humidification chamber air supply inlet 64 of the lower shell of the humidification chamber 1 through an air supply pipe 67, and a blowing component is provided in the air supply pipe 67. The air outlet of the blowing component in the air supply pipe 67 faces the second humidification chamber air supply inlet 64 of the lower shell of the humidification chamber 1, so that the water vapor discharged from the second dehumidification chamber water vapor outlet 66 at the lower part of the shell of the dehumidification chamber 24 of the second concentrating device passes into the second humidification chamber air supply inlet 64 of the lower shell of the humidification chamber 1, so as to enter the second cavity of the lower shell of the humidification chamber 1, and further pass into the first cavity of the upper shell of the humidification chamber 1;

[0123] The connecting channel 60 of the third concentrating device connects the first humidifying chamber water vapor outlet 57 of the upper shell of the humidifying chamber 1 with the first dehumidifying chamber water vapor inlet 58 of the upper shell of the dehumidifying chamber 24, so that the water vapor is discharged from the first humidifying chamber water vapor outlet 57 of the upper shell of the humidifying chamber 1 to the first dehumidifying chamber water vapor inlet 58 of the upper shell of the dehumidifying chamber 24, so as to enter the third cavity of the shell of the dehumidifying chamber 24;

[0124] The second dehumidification chamber water vapor outlet 66 at the lower part of the shell of the dehumidification chamber 24 of the third concentrating device is connected to the second humidification chamber air supply inlet 64 of the lower shell of the humidification chamber 1 through an air supply pipe 67, and a blowing component is arranged in the air supply pipe 67, and the air outlet of the blowing component in the air supply pipe 67 faces the second humidification chamber air supply inlet 64 of the lower shell of the humidification chamber 1, so that the water vapor discharged from the second dehumidification chamber water vapor outlet 66 at the lower part of the shell of the dehumidification chamber 24 of the third concentrating device passes into the second humidification chamber air supply inlet 64 of the lower shell of the humidification chamber 1, so as to enter the second cavity of the lower shell of the humidification chamber 1, and further pass into the first cavity of the upper shell of the humidification chamber 1.

[0125] For the series cascade scheme, the humidification and dehumidification salt-containing wastewater concentration method includes the following steps:

[0126] The saline waste liquid is introduced into the upper shell through the circulating waste liquid inlet 2 of the upper shell of the humidification bin 1 of the first concentrating device and sprayed by the spraying member to form water vapor and saline droplets, and the saline droplets drip along the axial direction of the shell to the second cavity of the lower shell, and the second cavity of the lower shell gathers the saline droplets;

[0127] The water vapor of the first concentrating device is discharged from the first humidifying chamber water vapor outlet 57 of the upper shell of the humidifying chamber 1 to the first dehumidifying chamber water vapor inlet 58 on the upper part of the shell of the dehumidifying chamber 24, so as to enter the third cavity of the shell of the dehumidifying chamber 24;

[0128] The saline waste liquid discharged from the circulating waste liquid discharge outlet 15 of the humidifying bin 1 of the previous stage concentrating device is passed into the circulating waste liquid inlet 2 of the humidifying bin 1 of the next stage concentrating device to enter the first cavity of the upper shell of the humidifying bin 1 of the next stage concentrating device;

[0129] The water outlet 23 of the cooling water component in the third cavity of the dehumidification bin 24 of the subsequent concentrating device is passed into the cooling water inlet 21 of the cooling component in the third cavity of the dehumidification bin 24 of the previous concentrating device, so as to enter the cooling component in the third cavity of the dehumidification bin 24 of the previous concentrating device, and is used to condense the water vapor in the third cavity;

[0130] The water vapor discharged from the first dehumidification chamber water vapor outlet 59 at the lower part of the shell of the dehumidification chamber 24 of the previous stage concentrating device is passed into the second dehumidification chamber water vapor inlet 65 at the upper part of the shell of the dehumidification chamber 24 of the next stage concentrating device, so as to enter the third cavity of the shell of the dehumidification chamber 24 of the next stage concentrating device;

[0131] The water vapor discharged from the second dehumidification chamber water vapor outlet 66 at the lower part of the shell of the dehumidification chamber 24 of the third concentrating device passes into the second humidification chamber air supply inlet 64 of the lower shell of the humidification chamber 1 to enter the second cavity of the lower shell of the humidification chamber 1, and further passes into the first cavity of the upper shell of the humidification chamber 1;

[0132] The water vapor discharged from the second humidification chamber water vapor outlet 63 of the upper shell of the humidification chamber 1 of the subsequent stage concentrating device passes into the air supply inlet 62 of the lower shell of the first humidification chamber of the humidification chamber 1 of the previous stage concentrating device, so as to enter the second cavity of the lower shell of the humidification chamber 1 of the previous stage concentrating device, and further passes into the first cavity of the upper shell of the humidification chamber 1 of the previous stage concentrating device;

[0133] in,

[0134] The water vapor of the humidification chamber 1 of the second concentrating device is discharged from the first humidification chamber water vapor outlet 57 of the upper shell to the first dehumidification chamber water vapor inlet 58 of the upper shell of the dehumidification chamber 24, so as to enter the third cavity of the shell of the dehumidification chamber 24;

[0135] The water vapor discharged from the second dehumidification chamber water vapor outlet 66 at the lower part of the shell of the dehumidification chamber 24 of the second concentrating device passes into the second humidification chamber air supply inlet 64 of the lower shell of the humidification chamber 1 to enter the second cavity of the lower shell of the humidification chamber 1, and further passes into the first cavity of the upper shell of the humidification chamber 1;

[0136] The water vapor in the humidification chamber 1 of the third concentrating device is discharged from the first humidification chamber water vapor outlet 57 of the upper shell into the first dehumidification chamber water vapor inlet 58 on the upper part of the shell of the dehumidification chamber 24 to enter the third cavity of the shell of the dehumidification chamber 24 .

[0137] Furthermore, the first heat exchanger exchanges heat between the outlet water of the cooling member in the third cavity of the shell of the first concentrating device and the circulating waste liquid discharged from the circulating waste liquid discharge outlet 15 of the third concentrating device to increase the heat of the circulating waste liquid;

[0138] The circulating waste liquid pump 27 extracts the circulating waste liquid in the circulating pool 29 and the external saline waste liquid;

[0139] The second heat exchanger exchanges heat between the extracted circulating waste liquid and the external saline waste liquid and the heat source to increase the heat of the extracted circulating waste liquid;

[0140] The circulating waste liquid is introduced into the circulating waste liquid inlet 2 of the shell of the first concentrating device.

[0141] On the basis of multiple rounds of humidification and dehumidification, the filler in the first cavity of the upper shell of each humidification bin 1 can be taken out when the machine is stopped, and vibrated to collect the salt crystals covering the surface of the filler.

[0142] For the series cascade solution, due to the large circulation of cold air and water vapor formed above, and due to the large circulation of gas in the humidification chamber 1 of the humidification and dehumidification salty waste liquid concentrator of different levels, the heat is gradually released and the temperature gradually increases. This leads to the existence of temperature difference in the humidification chamber 1 of the humidification and dehumidification salty waste liquid concentrator of different levels, that is, the temperature range of different humidification chambers 1 is different, which makes it possible for different types of salts sensitive to temperature precipitation to precipitate and adhere to the filler 42 in the humidification chamber 1 of the temperature range of the corresponding temperature difference. After the reaction is completed, the filler 42 of the humidification chamber 1 of the humidification and dehumidification salty waste liquid concentrator of different levels can be processed, and each humidification chamber 1 can obtain a relatively single type of salt crystal. That is, the temperature between the humidification and dehumidification salty waste liquid concentrators of the utility model is different, and the solubility of different salts or volatile substances at different temperatures is different, so as to achieve the separation of different salts and different volatile substances in the devices of each level.

[0143] Example 2: Figure 3 In this embodiment, in order to realize the concentrated desalination of high-concentration brine and recover solid waste salt, a multi-stage humidification and dehumidification saline waste liquid concentration system and device are connected in parallel, including: a heat source 25, a heating heat exchanger 26, a circulating waste liquid pump 27, a waste liquid stock 28, a circulating pool 29, a cooling water pump 31, circulating cooling water 32, a first-stage humidification and dehumidification saline waste liquid concentration device 33, a second-stage humidification and dehumidification saline waste liquid concentration device 34, a third-stage humidification and dehumidification saline waste liquid concentration device 35, a fourth-stage humidification and dehumidification saline waste liquid concentration device 36, a fifth-stage humidification and dehumidification saline waste liquid concentration device 37, and a centrifugal crystallizer 38.

[0144] The first-stage humidification and dehumidification saline waste liquid concentration device comprises: a humidification chamber 1 and a dehumidification chamber 24.

[0145] The original waste liquid is transported to the circulation pool 29 through the pipeline for full mixing. The circulating waste liquid in the circulation pool 29 is transported to the heating heat exchanger 26 through the circulating waste liquid pump 27 for heat exchange with the heat source. The heated waste liquid is simultaneously transported to the humidification bins 1 at each level. The cooling water is simultaneously transported to the dehumidification bins 24 at each level through the cooling water pump 31. The circulating waste liquid discharged from the humidification bins 1 at each level is uniformly concentrated in the centrifugal crystallizer 38 for sedimentation and crystallization. The supernatant after crystallization is transported back to the circulation pool 29, and the next cycle is carried out after full mixing. The cooling water generated by the dehumidification bins 24 at each level is uniformly transported back to the circulating cooling water.

[0146] The internal structures of the humidification chamber 1 and the dehumidification chamber 24 are the same as those in the first embodiment.

[0147] In each level of the humidification and dehumidification salt-containing wastewater concentration device, the humidification chamber 1 is connected to the dehumidification chamber 24, and the first humidification chamber water vapor outlet 57 (hot air outlet) of the humidification chamber 1 is connected to the first dehumidification chamber water vapor inlet 58 (hot air inlet) of the dehumidification chamber 24. The first humidification chamber air supply inlet 62 (cold air inlet) of the humidification chamber 1 is connected to the first dehumidification chamber water vapor outlet 59 (cold air outlet) of the dehumidification chamber 24.

[0148] The above-mentioned multi-stage humidification and dehumidification salt-containing waste liquid concentration system and device are used to concentrate the waste liquid, including the following steps:

[0149] The waste liquid is transported to the circulation pool 29 through the pipeline, and then transported to the heating heat exchanger 26 through the circulating waste liquid pump 27 to exchange heat with the heat source 25. The heated circulating waste liquid is transported to the humidification bin 1 of each level of humidification and dehumidification saline wastewater concentration device through the pipeline. The waste liquid is sprayed into the humidification bin 1 through the sprayer 3, and collides with the filler 11 during the falling process to form fine droplets, which are evenly distributed throughout the humidification bin 1. The excess circulating waste liquid is concentrated at the bottom of the humidification bin 1 and discharged into the centrifugal crystallizer 38. After centrifugal crystallization, crystallized salt and high-concentration wastewater are produced. The high-concentration circulating waste liquid is transported back to the circulation pool 29 to be fully mixed with the low-concentration waste liquid for the next concentration. The cooling water enters the dehumidification bin 24 of each level of humidification and dehumidification saline wastewater concentration device through the cooling water pump 31, flows from bottom to top in the cooling pipe, and the outflowing cooling water is used as the circulating cooling water. The fan drives the cold air in the dehumidification chamber 24 to enter from the first humidification chamber air supply inlet 62 (cold air inlet) below the humidification chamber 1. The cold air is gradually heated and humidified during the rising process. The hot air (water vapor) enters from the top of the dehumidification chamber 24. During the descending process, the hot air gradually cools down, and the water vapor it carries condenses into fresh water. The cooled and dehumidified air enters the next cycle.

[0150] Example 3: Figure 4In order to directly recover and utilize the condensed fresh water, the dehumidification structure of the dehumidification bin can be replaced with a spray type. On the original basis, the cooling tube 22 is removed, and a spray head B39, a block B40, a baffle B41, and a filler B42 are added. The operating principle of the device is similar to that of Example 2. Each level of humidification and dehumidification salt-containing waste liquid concentration device includes: a humidification bin 1 and a dehumidification bin 24. The waste liquid in the humidification bin 1 is heated and sprayed. Under the action of the fan, the cold air moves from bottom to top in the humidification bin, carrying a large amount of water vapor while heating up. Baffles B40 and block B41 are provided inside the dehumidification bin, and filler B42 is placed on the baffle to fill the internal space of the dehumidification bin. The circulating cooling water is passed into the spray head B, and the cooling water is sprayed into the dehumidification bin 1. The cooling water collides with the filler, which increases the contact area between the cooling water and the air and improves the cooling efficiency. The hot air outlet of the humidification chamber 1 is connected to the hot air inlet of the dehumidification chamber 24. The hot air moves from top to bottom inside the dehumidification chamber 24, and the temperature gradually decreases. The water vapor carried is condensed into fresh water. The sprayed cooling water and the condensed fresh water are collected at the bottom of the dehumidification chamber 24 and flow back into the circulating cooling water.

[0151] The wastewater of a certain factory needs to concentrate the alkali salt in the wastewater, but the excess ammonia needs to be removed. Therefore, a spray dehumidification chamber can be used to concentrate the wastewater. Alkali salt is a soluble salt, and the solubility of ammonia in water decreases with increasing temperature. After the wastewater is heated, the excess ammonia escapes and flows into the dehumidification chamber with the hot and humid air. During the dehumidification process, the temperature decreases, and the ammonia in the air dissolves in the sprayed cooling water and is then discharged with the cooling water.

[0152] Example 4: Figure 5 The humidification and dehumidification salt-containing waste liquid concentration device has the same structure as the first-level humidification and dehumidification salt-containing waste liquid concentration device in Example 2. The monitoring system includes: heater circulating waste liquid discharge outlet temperature 43, heater circulating waste liquid inlet temperature 44, heater waste liquid outlet temperature 45, heater circulating waste liquid inlet temperature 46, circulating waste liquid flow 47, waste liquid temperature 48, circulating pool temperature 49, circulating waste liquid inlet temperature 50, wind speed 51, cold air temperature 52, cooling water inlet temperature 53, cooling water flow 54, cooling water outlet temperature 55, hot air temperature 56. In this embodiment, the circulating waste liquid flow is controlled at 10m 3 , the flow rate of waste liquid into the circulation pool is 1m 3 The temperature of the circulating waste liquid flowing into the heating heat exchanger is 70℃, and the outflow temperature is 90℃. The heated circulating waste liquid flows into the humidification and dehumidification salt-containing waste liquid concentration device for concentration. The concentrated circulating waste liquid drops to 45℃ and is passed into the centrifugal crystallizer for crystallization and sedimentation. The upper clear liquid flows into the waste heat recovery heat exchanger, and flows into the circulation pool after the temperature rises to 70℃. In the circulation pool, the 50℃ waste liquid and the 70℃ circulating waste liquid are fully mixed, where the flow rate of the circulating waste liquid is 10 times that of the waste liquid. After full mixing, the temperature is close to 70℃, and the next cycle is carried out.

[0153] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0154] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0155] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0156] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0157] In the present utility model, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previously associated objects are in an "or" relationship. "At least one" means one or more; "at least one of A and B" is similar to "A and / or B", describing the association relationship of associated objects, indicating that three relationships may exist. For example, at least one of A and B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0158] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0159] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A humidification and dehumidification saline waste liquid concentration device, characterized in that: include The humidification chamber comprises an upper shell and a fresh air supply component, wherein the upper shell is provided with a first humidification chamber water vapor outlet; The dehumidification chamber comprises a shell and a cooling member, wherein a first dehumidification chamber water vapor inlet is arranged on the upper portion of the shell; A connecting passage connecting the water vapor outlet of the first humidification chamber and the water vapor inlet of the first dehumidification chamber; Among them, the fresh air supply component of the humidification chamber includes an air supply duct and a blowing component, the air supply duct is connected with the interior of the humidification chamber through the first humidification chamber air supply inlet, and the air outlet of the blowing component faces the first humidification chamber air supply inlet.

2. The humidification and dehumidification saline waste liquid concentration device according to claim 1, characterized in that: in, The humidification chamber also includes a sieve plate, a lower shell, a filler and a spray component; The upper shell forms a first cavity inside, the lower shell forms a second cavity inside, and the sieve plate separates the first cavity from the second cavity; The upper shell is provided with a circulating waste liquid inlet, and the lower shell is provided with a circulating waste liquid discharge outlet; The spraying member inputs the saline waste liquid into the first cavity through the circulating waste liquid inlet of the upper shell, forms water vapor and saline droplets through spraying, and the filler is filled in the first cavity of the upper shell; Wherein, a third cavity is formed inside the shell of the dehumidification chamber; The lower part of the shell is provided with a first dehumidification chamber water vapor outlet and a water droplet discharge outlet; The cooling member cools the water vapor introduced into the third cavity through the water vapor inlet at the upper portion of the shell to form water droplets; Wherein, the connecting channel connects the first humidification chamber water vapor outlet of the upper shell of the humidification chamber and the first dehumidification chamber water vapor inlet on the upper part of the shell of the dehumidification chamber, so that the water vapor passes from the interior of the humidification chamber into the interior of the dehumidification chamber.

3. The humidification and dehumidification saline waste liquid concentration device according to claim 2, characterized in that: in, The humidification chamber further includes an auxiliary heater and a baffle, wherein the auxiliary heater includes a plurality of groups of resistance wires radially arranged in parallel in the humidification chamber, the resistance wires are bent along the dripping stroke direction of the water droplets and arranged inside the humidification chamber, and gaps are arranged between the groups of resistance wires to allow the water droplets to pass through; at least two of the baffles are spaced apart inside the humidification chamber along the dripping stroke direction of the salt-containing droplets; Among them, the cooling component of the dehumidification bin includes a plurality of groups of cooling pipes radially and parallelly arranged in the dehumidification bin, the cooling pipes are bent and arranged inside the dehumidification bin along the dripping direction of the salt-containing liquid droplets, and gaps are arranged between each group of cooling pipes to allow the water droplets to pass through, wherein the cooling pipes include a cooling water inlet and a cooling water outlet.

4. The humidification and dehumidification saline waste liquid concentration device according to claim 3, characterized in that: The auxiliary heater of the dehumidification chamber also includes an outer shell, which is embedded in a shell connected to the humidification chamber, so that part of the outer shell is arranged outside the humidification chamber, and part of the outer shell is arranged inside the humidification chamber, and the power supply line of the resistance wire passes through the outer shell into the interior of the humidification chamber and is connected to the resistance wire, and the end of the resistance wire is fixed to the outer shell inside the humidification chamber, so that the resistance wire is fixed inside the humidification chamber.

5. The humidification and dehumidification saline waste liquid concentration device according to claim 3, characterized in that: The dehumidification chamber also includes a baffle and a block, the block is connected to the shell of the dehumidification chamber, the baffle is semicircular and connected to the block, and the arc directions of two adjacent baffles separated by a certain space along the dripping direction of the salt-containing droplets are opposite.

6. The humidification and dehumidification saline waste liquid concentration device according to claim 2, characterized in that: The fresh air supply component of the dehumidification chamber further includes an air preheater, which is arranged in the air supply duct and upstream of the blowing component.

7. A humidification and dehumidification saline waste liquid concentration system, characterized in that: comprising a concentrating device, wherein the concentrating device is configured as a first concentrating device disposed at a head end, at least one second concentrating device disposed in a middle section, and a third concentrating device disposed at a terminal end, wherein the concentrating device is the concentrating device according to any one of claims 2 to 6; The upper shell of the humidification chamber of the second concentrating device is also provided with a second humidification chamber water vapor outlet, and the lower shell of the humidification chamber is also provided with a second humidification chamber air supply inlet. The upper part of the shell of the dehumidification chamber of the second concentrating device is also provided with a second dehumidification chamber water vapor inlet, and the lower part of the shell of the dehumidification chamber is also provided with a second dehumidification chamber water vapor outlet; The upper shell of the humidification chamber of the third concentrating device is also provided with a second humidification chamber water vapor outlet, and the lower shell of the humidification chamber is also provided with a second humidification chamber air supply inlet. The upper part of the shell of the dehumidification chamber of the third concentrating device is also provided with a second dehumidification chamber water vapor inlet, and the lower part of the shell of the dehumidification chamber is also provided with a second dehumidification chamber water vapor outlet; in: The connection channel of the first concentrating device is connected to the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber and the first dehumidifying chamber water vapor inlet at the upper part of the shell of the dehumidifying chamber; The circulating waste liquid inlet of the upper shell of the humidification bin of the subsequent stage concentrating device is connected to the circulating waste liquid discharge outlet of the lower shell of the humidification bin of the previous stage concentrating device; The cooling water outlet of the cooling member in the third cavity of the dehumidification bin of the subsequent concentrating device is communicated with the cooling water inlet of the cooling member in the third cavity of the dehumidification bin of the previous concentrating device; The second dehumidification chamber water vapor inlet at the upper part of the shell of the dehumidification chamber of the subsequent stage concentrator is connected to the first dehumidification chamber water vapor outlet at the lower part of the shell of the dehumidification chamber of the previous stage concentrator; The second humidification chamber water vapor outlet of the upper shell of the humidification chamber of the subsequent stage concentrating device is communicated with the first humidification chamber air supply inlet of the lower shell of the humidification chamber of the previous stage concentrating device; The connecting channel of the second concentrating device is connected to the first humidification chamber water vapor outlet of the upper shell of the humidification chamber and the first dehumidification chamber water vapor inlet at the upper part of the shell of the dehumidification chamber; The second dehumidification chamber water vapor outlet at the lower part of the shell of the dehumidification chamber of the second concentrating device is connected to the second humidification chamber air supply inlet of the lower shell of the humidification chamber through an air supply pipeline, and a blowing component is provided in the air supply pipeline, and the air outlet of the blowing component in the air supply pipeline faces the second humidification chamber air supply inlet of the lower shell of the humidification chamber; The connection channel of the third concentrating device is connected to the first humidification chamber water vapor outlet of the upper shell of the humidification chamber and the first dehumidification chamber water vapor inlet at the upper part of the shell of the dehumidification chamber; The second dehumidification chamber water vapor outlet at the lower part of the shell of the dehumidification chamber of the third concentrating device is connected to the second humidification chamber air supply inlet of the lower shell of the humidification chamber through an air supply pipe, and a blowing component is arranged in the air supply pipe, and the air outlet of the blowing component in the air supply pipe faces the second humidification chamber air supply inlet of the lower shell of the humidification chamber.

8. The humidification and dehumidification saline waste liquid concentration system according to claim 7, characterized in that: It also includes a first heat exchanger, a circulation pool, a circulating waste liquid pump and a second heat exchanger; The cooling water inlet of the cooling member in the third cavity of the shell of the dehumidification bin of the third concentrating device is connected to external cooling water, the cooling water outlet of the cooling member in the third cavity of the shell of the dehumidification bin of the first concentrating device is connected to the primary side of the first heat exchanger, and the output of the primary side of the first heat exchanger is connected to the external cooling water; The circulating waste liquid discharge outlet of the lower shell of the dehumidification bin of the third concentrating device is connected to the secondary side of the first heat exchanger, so that the circulating waste liquid discharged from the circulating waste liquid discharge outlet of the lower shell of the dehumidification bin of the third concentrating device passes into the secondary side of the first heat exchanger, and the output of the secondary side of the first heat exchanger is connected to the circulation pool, and the exogenous salt-containing waste liquid is connected to the circulation pool through a pipeline; The salt-containing waste liquid in the circulation pool and the external salt-containing waste liquid are extracted by the circulating waste liquid pump through a pipeline and output to the first side of the second heat exchanger. The first side of the second heat exchanger is connected to the circulating waste liquid inlet of the upper shell of the humidification tank of the first concentrating device, and the second side of the second heat exchanger is the heat source medium flow side.

9. A humidification and dehumidification saline waste liquid concentration system, characterized in that: Comprising a concentrating device, wherein the concentrating device is configured as at least two, and the concentrating device is the concentrating device according to any one of claims 2 to 6; in: The circulating waste liquid inlet of the upper shell of the humidification bin of the concentrating device is connected in parallel to the saline waste liquid inlet pipe, so that the saline waste liquid is passed in parallel to the circulating waste liquid inlet of the upper shell of the humidification bin of the concentrating device, and then enters the first cavity of the upper shell of the humidification bin in parallel; The connecting channel of the concentrating device is connected to the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber and the first dehumidifying chamber water vapor inlet of the upper shell of the dehumidifying chamber, so that the water vapor is discharged from the first humidifying chamber water vapor outlet of the upper shell of the humidifying chamber to the first dehumidifying chamber water vapor inlet of the upper shell of the dehumidifying chamber, so as to enter the third cavity of the shell of the dehumidifying chamber; The circulating waste liquid discharge outlet of the lower shell of the humidifying bin of the concentrating device is connected in parallel to the first liquid discharge pipe, so that the salt-containing liquid droplets sprayed and dripped from the first cavity of the upper shell fall into the second cavity of the lower shell, and are discharged in parallel from the circulating waste liquid discharge outlet of the lower shell of the humidifying bin; The cooling water inlet of the cooling member in the third cavity of the shell of the dehumidification bin of the concentrating device is connected in parallel to the external cooling water, so that the external cooling water is connected in parallel to the cooling water inlet of the cooling member in the third cavity of the shell of the dehumidification bin to enter the cooling member for condensing the water vapor in the third cavity; The cooling water outlet of the cooling member of the dehumidification bin of the concentrator is connected in parallel to the second liquid discharge pipe, so that the cooling water that enters the cooling member and is used to liquefy the water vapor in the third cavity is discharged from the cooling water outlet to be connected in parallel to the second liquid discharge pipe; The first dehumidification bin water vapor outlet of the lower shell of the dehumidification bin of the concentrating device and the first humidification bin air supply inlet of the lower shell of the humidification bin are connected through an air supply duct, and a blowing component is arranged in the air supply duct, and the air outlet of the blowing component in the air supply duct faces the first humidification bin air supply inlet of the humidification bin, so that the water vapor in the dehumidification bin passes from the first dehumidification bin water vapor outlet of the lower shell of the dehumidification bin to the first humidification bin air supply inlet of the lower shell of the humidification bin, so as to enter the second cavity of the lower shell of the humidification bin and further pass into the first cavity of the upper shell of the humidification bin.

10. The humidification and dehumidification saline waste liquid concentration system according to claim 9, characterized in that: It also includes a centrifugal crystallizer, a circulation pool, a circulating waste liquid pump, a second heat exchanger and a heat source medium; The saline waste liquid discharged from the circulating waste liquid discharge outlet of the lower shell of the dehumidification bin of the concentrator to the first liquid discharge pipe is connected to the centrifugal crystallizer through a pipeline, the centrifugal crystallizer is connected to the circulation pool through a pipeline, and the exogenous saline waste liquid is connected to the circulation pool through a pipeline; The circulating waste liquid in the circulation pool and the external salt-containing waste liquid are extracted by the circulating waste liquid pump through a pipeline and output to the first side of the second heat exchanger. The first side of the second heat exchanger is connected in parallel to the circulating waste liquid inlet of the upper shell of the humidification bin of each concentrating device. The second side of the second heat exchanger is the heat source medium flow side.

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