Water recycling system

Abstract

The invention discloses a water recycling system, which relates to the technical field of wastewater treatment and comprises a cooling water tank, a cooling water return tank and a condensation water return tank, the cooling water return pool is provided with a first main partition pool and a first secondary partition pool, the volume of the first main partition pool is larger than that of the first secondary partition pool, the condensation water return pool is provided with a second main partition pool and a second secondary partition pool, and the volume of the second main partition pool is larger than that of the second secondary partition pool; a heat pump set is arranged between the first partition tank and the second partition tank and is provided with a cold-end water conveying pipeline and a hot-end water conveying pipeline, the water inlet end of the cold-end water conveying pipeline is communicated with the first partition tank, and the water inlet end of the hot-end water conveying pipeline is communicated with the second partition tank; a first siphon is arranged between the first main partition tank and the first secondary partition tank; a port, communicated with the first main partition tank, of the first siphon is higher than the other end; a second siphon is arranged between the second main partition tank and the second secondary partition tank; and a port, communicated with the second main partition tank, of the second siphon is higher than the other end. According to the invention, the preparation of recycled hot water is simpler and more convenient.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and particularly to a water recovery and reuse system. Background Art

[0002] Dyeing and finishing, also known as printing and dyeing, is a processing method, which is the general term for pretreatment, dyeing, printing, post-finishing, washing, etc. During the production process of printing and dyeing factories, a large amount of heat energy and electric energy are consumed, especially the consumption of heat energy is the largest. Since the dyeing and finishing process requires heating a large amount of industrial water to 90°C - 130°C, the heat energy consumption for washing, bleaching, dyeing and other processes accounts for about 80% of the total heat energy consumption in the whole process, and the remaining 20% is used for drying and heat setting processes. The wastewater discharged after the printing and dyeing process has a temperature above 80°C. At present, most printing and dyeing factories in China do not recycle the heat of this part of the waste hot water, resulting in huge waste. If this part of the heat energy can be recovered, it will bring considerable economic benefits.

[0003] In the printing and dyeing process, the temperature of the condensed water recovered by the heat exchangers of the stenter and dryer is generally between 80 - 90°C, and the temperature of the cooling and recovered water of the dyeing machine is generally between 55 - 80°C. The amount of the recovered water from the cooling water of the dyeing machine is relatively large. The above recovered water can be used for the washing process of the washing machine, the reduction cleaning process of polyester, the cotton-containing oxygen bleaching process, etc. The washing machine has multiple washing process steps at different temperatures, and the temperature range of the washing process steps of the washing machine is between 60 - 85 degrees, the temperature of the reduction cleaning process of polyester is between 85 - 90 degrees, and the cotton-containing oxygen bleaching process is above 95°C.

[0004] Therefore, the recovered water from the printing and dyeing process can meet the direct use of some processes, but it needs to be reheated for use in other processes. In order to allocate the recovered water, it is necessary to add containers and pipelines, which is rather cumbersome. Therefore, how to better allocate and use the recovered water has become a major problem. Summary of the Invention

[0005] In order to make the allocation and use of the recovered hot water from printing and dyeing more convenient, this application provides a water recovery and reuse system.

[0006] A water recovery and reuse system provided by this application adopts the following technical solutions: A water recycling system comprises a cooling water pool, a cooling return water pool and a condensation return water pool, wherein the water temperature of the cooling water pool is lower than the water temperature of the cooling return water pool, and the water temperature of the cooling return water pool is lower than the water temperature of the condensation return water pool; the cooling return water pool is provided with a first main compartment and a first compartment, the volume of the first main compartment is greater than the volume of the first compartment, the condensation return water pool is provided with a second main compartment and a second compartment, the volume of the second main compartment is greater than the volume of the second compartment; the first main compartment and the second main compartment are used to supply water to dyeing and finishing equipment, the first main compartment A heat pump group is provided between the secondary compartment and the second secondary compartment, and the heat pump group has a cold end water supply pipeline and a hot end water supply pipeline, the water inlet end of the cold end water supply pipeline is connected to the first primary compartment, and the water inlet end of the hot end water supply pipeline is connected to the second secondary compartment; a first siphon is provided between the first main compartment and the first primary compartment, and the port of the first siphon connected to the first main compartment is higher than the other port; a second siphon is provided between the second main compartment and the second secondary compartment, and the port of the second siphon connected to the second main compartment is higher than the other port.

[0007] By adopting the above technical solution, the water in the cooling water pool is used to adjust the water temperature of the dyeing machine and other equipment. The water temperature of the cooling water pool increases after passing through the dyeing machine and other equipment, and is discharged into the cooling return water pool. The water temperature in the cooling return water pool and the condensation return water pool is relatively high, and can be used for washing in the washing machine. The cooling return water pool separates the first main compartment and the first compartment, and the condensation return water pool separates the second main compartment and the second compartment. The water in the first main compartment and the second main compartment is used to supply water to dyeing and finishing equipment such as the washing machine. The heat pump group can transfer the heat of the first compartment to the second compartment, so that the water temperature of the second compartment increases, so that the water in the second compartment can reach a higher water temperature, the water in the second compartment can be recycled, and the water in the first compartment is discharged after cooling, which can reduce energy waste. The cold end water delivery pipeline of the heat pump group consumes the hot water in the first compartment, and the hot end water delivery pipeline of the heat pump group consumes the hot water in the second compartment. As the hot water in the first compartment and the second compartment is gradually consumed, the first siphon siphons and replenishes hot water from the first main compartment, and the second siphon siphons and replenishes hot water from the second main compartment. By separating the cooling return water pool and the condensation return water pool to increase the water storage space, and using the first siphon and the second siphon to automatically replenish water, the allocation and use of the hot water recovered from printing and dyeing can be made easier.

[0008] Optionally, the water outlet end of the cold end water supply pipeline is connected to the cooling water pool.

[0009] By adopting the above technical solution, the temperature of the water in the first compartment drops after passing through the cold end of the heat pump unit and can be discharged into the cooling water pool for utilization, thereby reducing the waste of water resources.

[0010] Optionally, the drainage water level of the first main separation tank is higher than that of the first sub-separation tank, and the drainage water level of the second main separation tank is higher than that of the second sub-separation tank.

[0011] By adopting the above technical solution, the drainage water level of the first main separation tank is higher than that of the first sub-separation tank, enabling the first sub-separation tank to supply water to the second sub-separation tank preferentially through the first siphon tube. Similarly, the second main separation tank can supply water to the second sub-separation tank preferentially through the second siphon tube.

[0012] Optionally, a bypass tube is provided on the outlet pipe section of the cold-end water supply pipeline, the bypass tube extends into the first sub-separation tank, and the bypass tube is provided with a first on-off valve.

[0013] By adopting the above technical solution, when the bypass tube is opened, the water discharged from the cold-end water supply pipeline of the heat pump unit can be discharged into the first sub-separation tank through the bypass tube, enabling the cold-end water supply pipeline of the heat pump unit to circulate and pump out the water in the first sub-separation tank, increasing the reduction range of the water temperature in the first sub-separation tank. After the water temperature in the first sub-separation tank drops to a relatively low temperature, then close the first on-off valve on the bypass tube, and discharge the water in the first sub-separation tank into the cooling water tank, which is beneficial to reducing the water temperature in the cooling water tank, thereby improving the cooling and temperature adjustment effect of the water in the cooling water tank.

[0014] Optionally, the first on-off valve is a three-way valve, the inner cavity of the three-way valve is kept in communication with the water inlet end of the cold-end water supply pipeline, and the three-way valve is alternately switched to communicate with the bypass tube and the water outlet end of the cold-end water supply pipeline.

[0015] By adopting the above technical solution, the communication state between the water inlet and outlet of the cold-end water supply pipeline or with the bypass tube can be directly controlled by the three-way valve, which is beneficial to simplifying the structure.

[0016] Optionally, a vertical partition is provided in the first sub-separation tank, the vertical partition can slide horizontally, there is frictional damping between the vertical partition and the inner wall of the first sub-separation tank, and the sliding direction of the vertical partition is perpendicular to the vertical partition; the vertical partition is provided with a communication port, a sealing plate is hinged on the side of the vertical partition away from the bypass tube, and the sealing plate closes the communication port in the hanging state; a reciprocating driving mechanism is installed on the top surface of the first sub-separation tank, the reciprocating driving mechanism is located on the side of the vertical partition away from the bypass tube, and a traction rope is connected between the reciprocating driving mechanism and the sealing plate; the bypass tube and the water inlet end of the cold-end water supply pipeline are located on one side of the vertical partition, and the first siphon tube is located on the other side of the vertical partition.

[0017] By adopting the above technical solution, since the water inlet end of the cold-end water delivery pipeline of the heat pump unit and the bypass pipe are on the same side of the vertical partition, when the bypass pipe is opened, it can circulate and drain the water on one side of the vertical partition in the first separation tank at the cold end of the heat pump unit. When the bypass pipe is closed, the cold-end drain pipeline of the heat pump unit drains the water in the first separation tank into the cooling water tank. During this process, the water volume on the side of the vertical partition close to the bypass pipe gradually decreases. At the same time, the first siphon sucks the water in the first main separation tank into the side of the first separation tank far from the bypass pipe for replenishment. During this process, the vertical partition can adaptively move towards the water inlet of the cold-end water delivery pipeline, reducing the mixing of water with different water temperatures on both sides of the vertical partition. After the second separation tank is filled with water, the reciprocating driving mechanism slowly drives the vertical partition to move in the reverse direction through the traction rope. During this process, the traction rope forces the sealing plate to rotate upwards away from the communication port, enabling the water on the side of the vertical partition close to the first siphon to flow to the other side. When the vertical partition moves back to its original position and the water levels on both sides of the vertical partition are the same, the reciprocating driving mechanism is reset, and then the reciprocating driving mechanism releases the traction rope and the sealing plate, causing the sealing plate to close the communication port again.

[0018] Optionally, the vertical partition is of a hollow shell structure, the inside of the vertical partition is evacuated, the top of the vertical partition is provided with an exhaust pipe, the exhaust pipe is provided with a third on-off valve, and the exhaust pipe is provided with a pneumatic joint.

[0019] By adopting the above technical solution, the vertical partition is set as a hollow structure. In the case where the vertical partition is evacuated, it can reduce the heat transfer effect of the water on both sides of the vertical partition, which is beneficial for the heat pump unit to reduce the water temperature on one side of the vertical partition as much as possible. On the other hand, setting the vertical partition as a hollow structure is beneficial for reducing the weight of the vertical partition, making it easier for the reciprocating driving mechanism to drive the vertical partition to move horizontally.

[0020] Optionally, grooves are provided at the bottom and both sides of the vertical partition, the grooves at the bottom and both sides of the vertical partition are interconnected, flexible water-absorbing filling materials are provided in each groove of the vertical partition, and the bottom and both sides of the vertical partition are abutted against the inner wall of the first separation tank through the flexible water-absorbing filling materials.

[0021] By adopting the above technical solution, the flexible water-absorbing filling material can block the gap between the vertical partition and the inner wall of the first partition, and the flexible water-absorbing filling material has dense gaps that can hinder the flow of water. When the bottom and both sides of the vertical partition abut against the inner wall of the first partition through the flexible water-absorbing filling material, the convection of water on both sides of the vertical partition can be better hindered, thereby ensuring the heat insulation effect of the partition of the vertical partition. The flexible water-absorbing filling material can make the vertical partition form a flexible contact with the inner wall of the first partition to better adapt to the undulations of the inner wall of the first partition, which is conducive to reducing the jamming of the vertical partition when moving. The flexible water-absorbing filling material is arranged in the groove of the vertical partition, which can keep the position of the flexible water-absorbing filling material stable.

[0022] Optionally, the first siphon tube and the second siphon tube are siphon tubes with the same structure, and the siphon tube is provided with a water injection riser, the water injection riser is arranged upward, and the water injection riser is provided with a second switch valve.

[0023] By adopting the above technical solution, when the siphon tube is emptied and cannot work normally, water can be injected into the siphon tube through the water injection riser to fill the water. When the siphon tube is full of water, the second switch valve is closed to keep the siphon tube in a normal working state.

[0024] Optionally, a movable sealing member is provided at one end of the siphon tube, and the movable sealing member is used to close the port of the siphon tube; the movable sealing member of the first siphon tube is located in the first main compartment, and the movable sealing member of the second siphon tube is located in the second main compartment.

[0025] By adopting the above technical scheme, when the siphon tube is filled with water through the water injection riser, one end of the siphon tube is first closed by using the movable sealing member, so that during the process of the water injection riser injecting water into the siphon tube, the siphon tube only discharges water through one port, thereby making it easier for the water injection riser to fill the siphon tube to meet the siphoning conditions.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: The cold end water delivery pipeline of the heat pump group consumes the hot water in the first compartment, and the hot end water delivery pipeline of the heat pump group consumes the hot water in the second compartment. As the hot water in the first compartment and the second compartment is gradually consumed, the first siphon siphons and replenishes hot water from the first main compartment, and the second siphon siphons and replenishes hot water from the second main compartment. By separating the cooling return water pool and the condensation return water pool to increase the water storage space, and using the first siphon and the second siphon to automatically replenish water, the allocation and use of the hot water recovered from printing and dyeing can be made easier.

[0027] The water in the first compartment has its temperature lowered after passing through the cold end of the heat pump unit and can be discharged into the cooling water pool for utilization, thus reducing water waste. Brief Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1.

[0029] Figure 2 It is a schematic diagram of the structures of the cooling water pool, the temperature reduction return water pool, and the condensation return water pool of Embodiment 1.

[0030] Figure 3 It is a schematic diagram of the structure of the siphon of Embodiment 1.

[0031] Figure 4 It is a schematic diagram of the structures of the cooling water pool, the temperature reduction return water pool, and the condensation return water pool of Embodiment 2.

[0032] Figure 5 It is a top view of the temperature reduction return water pool of Embodiment 2.

[0033] Figure 6 It is a cross-sectional view of the vertical partition of Embodiment 2.

[0034] Description of the Reference Numerals: 1, cooling water pool; 2, temperature reduction return water pool; 21, first main partition pool; 22, first secondary partition pool; 3, condensation return water pool; 31, second main partition pool; 32, second secondary partition pool; 4, heat pump unit; 41, cold-end water delivery pipeline; 411, bypass pipe; 412, first switching valve; 42, hot-end water delivery pipeline; 43, compressor; 44, expansion valve; 45, evaporator; 46, condenser; 5, siphon; 501, first siphon; 502, second siphon; 51, water injection riser; 52, movable sealing member; 521, horizontal plate; 522, insertion rod; 523, sling; 53, second switching valve; 6, vertical partition; 61, roller; 62, exhaust pipe; 621, third switching valve; 622, pneumatic joint; 63, groove; 64, flexible water-absorbing filling material; 65, communication port; 66, sealing plate; 7, reciprocating driving mechanism; 71, towing rope; 8, drainage pipeline; 10, dyeing machine; 20, drying heat exchanger; 30, shaping machine; 40, flash evaporation tank; 50, washing machine. Detailed Description of the Embodiments

[0035] The following further elaborates on this application Figure 1-6 in conjunction with the attached drawings. Embodiment 1

[0036] The embodiment of this application discloses a water recycling and reuse system. Refer to Figure 1 and Figure 2, including a cooling water pool 1, a temperature reduction return water pool 2, and a condensation return water pool 3. The water temperature of the cooling water pool 1 is lower than that of the temperature reduction return water pool 2, and the water temperature of the temperature reduction return water pool 2 is lower than that of the condensation return water pool 3. The water in the cooling water pool 1 is used to adjust the water temperature of equipment such as a dyeing machine 10. The pipeline connecting the cooling water pool 1 to the dyeing machine 10 controls the water inlet using a solenoid valve. The water in the cooling water pool 1 is used to cool and adjust the cooling water supplied to the dyeing machine 10, etc. After the water in the cooling water pool 1 passes through equipment such as the dyeing machine 10, the water temperature rises and then drains into the temperature reduction return water pool 2. The water temperatures in the temperature reduction return water pool 2 and the condensation return water pool 3 are relatively high and can be used for the water washing work of a water washing machine 50. The condensation return water pool 3 is used to recover the steam condensate of a stenter 30 and a drying heat exchanger 20. Among them, the medium-pressure steam tail gas during the operation of the stenter 30 is connected to a flash tank 40 to produce low-pressure steam, and the condensate generated by the flash tank 40 is automatically drained into the condensation return water pool 3 according to the set water level.

[0037] Refer to Figure 1 and Figure 2 , the temperature reduction return water pool 2 is provided with a first main partition pool 21 and a first secondary partition pool 22, and the volume of the first main partition pool 21 is larger than that of the first secondary partition pool 22. The condensation return water pool 3 is provided with a second main partition pool 31 and a second secondary partition pool 32, and the volume of the second main partition pool 31 is larger than that of the second secondary partition pool 32; the cooling water pool 1, the first main partition pool 21, and the second main partition pool 31 are all provided with a drainage pipeline 8 for supplying water externally. The drainage pipeline 8 is provided with a solenoid valve to control the water supply. Among them, the drainage pipeline 8 of the first main partition pool 21 supplies water to the water washing machine, and the water washing machine 50 automatically replenishes water according to the change in the water level; the drainage pipeline 8 of the second main partition pool 31 supplies water to the polyester reduction cleaning process and the cotton-containing oxygen bleaching process of dyeing and finishing equipment, etc.

[0038] Refer to Figure 2 , a heat pump group 4 is provided between the first secondary partition pool 22 and the second secondary partition pool 32. The heat pump group 4 is used to transfer the heat of the first secondary partition pool 22 to the second secondary partition pool 32. The heat pump group 4 includes a compressor 43, an expansion valve 44, an evaporator 45, a condenser 46, a cold-end water pipeline 41, and a hot-end water pipeline 42. The compressor 43, the expansion valve 44, the evaporator 45, and the condenser 46 are connected in series through pipelines to form a refrigerant circuit. The cold-end water pipeline 41 is connected to the evaporator 45, and the hot-end water pipeline 42 is connected to the condenser 46; the water inlet end of the cold-end water pipeline 41 communicates with the first secondary partition pool 22, and the water outlet end of the cold-end water pipeline 41 communicates with the cooling water pool 1. The water inlet end of the hot-end water pipeline 42 communicates with the second secondary partition pool 32, and the water outlet end of the hot-end water pipeline 42 is used to supply hot water to dyeing and finishing equipment such as the dyeing machine 10.

[0039] Refer to Figure 2 and Figure 3The cooling return water pool 2 and the condensation return water pool 3 are both provided with a siphon 5. The siphon 5 of the cooling return water pool 2 is a first siphon 501, and the siphon 5 of the condensation return water pool 3 is a second siphon 502. The first siphon 501 connects the first main compartment 21 with the first secondary compartment 22, and the port of the first siphon 501 connected to the first main compartment 21 is higher than the other port; the second siphon 502 connects the second main compartment 31 with the second secondary compartment 32, and the port of the second siphon 502 connected to the second main compartment 31 is higher than the other port.

[0040] The drainage water level of the first main compartment 21 is higher than the drainage water level of the first compartment 22, the port of the first siphon 501 located in the first main compartment 21 is higher than the drainage water level of the first compartment 22, the drainage water level of the second main compartment 31 is higher than the drainage water level of the second compartment 32, and the port of the second siphon 502 located in the second main compartment 31 is higher than the drainage water level of the second compartment 32.

[0041] The implementation principle of the water recycling system of this embodiment is as follows: the cooling water return pool 2 is separated into the first main compartment 21 and the first compartment 22, the condensation water return pool 3 is separated into the second main compartment 31 and the second compartment 32, and the water in the first main compartment 21 and the second main compartment 31 is used to supply water to the washing machine. The heat pump group 4 can transfer the heat of the first compartment 22 to the second compartment 32, so that the water temperature of the second compartment 32 rises, so that the water of the second compartment 32 can reach a higher water temperature, the water of the second compartment 32 can be recycled, and the water of the first compartment 22 is discharged after cooling, which can reduce energy waste. The cold end water delivery pipeline 41 of the heat pump group 4 consumes the hot water in the first compartment 22, and the hot end water delivery pipeline 42 of the heat pump group 4 consumes the hot water in the second compartment 32. As the hot water in the first compartment 22 and the second compartment 32 is gradually consumed, the first siphon 501 siphons and replenishes hot water from the first main compartment 21, and the second siphon 502 siphons and replenishes hot water from the second main compartment 31. By separating the cooling return water pool 2 and the condensation return water pool 3 to increase the water storage space, and using the siphon 5 to automatically replenish water, the preparation and use of the hot water recovered from printing and dyeing can be made simpler.

[0042] Reference Figure 2 The outlet pipe section of the cold-end water supply pipeline 41 is provided with a bypass pipe 411, and the bypass pipe 411 extends into the first compartment 22; the bypass pipe 411 is provided with a first switch valve 412, and the first switch valve 412 is a three-way valve. The inner cavity of the three-way valve is connected with the water inlet end of the cold-end water supply pipeline 41, and the three-way valve is alternately switched and connected with the bypass pipe 411 and the water outlet end of the cold-end water supply pipeline 41.

[0043] When the bypass pipe 411 is opened, the water discharged from the cold-end water delivery pipeline 41 of the heat pump unit 4 can be discharged into the first partition tank 22 through the bypass pipe 411, so that the cold-end water delivery pipeline 41 of the heat pump unit 4 circulates to pump and drain the water in the first partition tank 22, increasing the degree of decrease in the water temperature in the first partition tank. When the water temperature in the first partition tank drops to a relatively low temperature, then close the first switching valve 412 on the bypass pipe 411, and discharge the water in the first partition tank into the cooling water tank 1, which is beneficial to reducing the water temperature in the cooling water tank 1, thereby improving the cooling and temperature adjustment effect of the water in the cooling water tank 1.

[0044] Referring to Figure 3 , the siphon 5 is provided with a water injection riser 51, the water injection riser 51 is arranged upward, the water injection riser 51 is provided with a second switching valve 53, and the second switching valve 53 is a ball valve or a globe valve, etc. One end of the siphon 5 is provided with a movable sealing member 52, and the movable sealing member 52 is used to seal the port of the siphon 5. The movable sealing member 52 includes a horizontal plate 521, and the horizontal plate 521 is provided with a plurality of insertion rods 522. Each insertion rod 522 is inserted into the inner side of the siphon 5 from bottom to top and abuts against the inner wall of the siphon 5. The horizontal plate 521 is connected with a sling 523, and one end of the sling 523 away from the horizontal plate 521 is tied to the siphon 5 or the water injection riser 51; the movable sealing member 52 of the first siphon 501 is located in the first main partition tank 21, and the movable sealing member 52 of the second siphon 502 is located in the second main partition tank 31.

[0045] The water injection riser 51 can be used to inject water into the siphon 5 to make the siphon 5 filled with water to form the condition of siphon. When using the water injection riser 51 to inject water into the siphon 5, use the sling 523 to lift the movable sealing member 52 upward, so that the horizontal plate 521 of the movable sealing member 52 seals one end port of the siphon 5. Then open the second switching valve 53, and inject water into the siphon 5 through the water injection riser 51. When the siphon 5 is filled with water to reach the siphon condition, close the second switching valve 53. Then lower the sling 523 to make the movable sealing member 52 move down and leave the port of the siphon 5. Embodiment 2

[0046] Referring to Figure 4 and Figure 5 , the difference between this embodiment and Embodiment 1 is that a vertical partition 6 is provided in the first partition tank 22. On both sides of the top of the vertical partition 6, a set of rollers 61 are respectively provided, and the rollers 61 can slide along the top surface of the first partition tank 22, so that the vertical partition 6 can slide horizontally. There is a frictional damping between the vertical partition 6 and the inner wall of the first partition tank 22, and the sliding direction of the vertical partition 6 is perpendicular to the vertical partition 6.

[0047] Referring to Figure 6, the vertical partition 6 is a hollow shell structure. The bottom of the vertical partition 6 is thickened so that the center of gravity of the vertical partition is lower. The top of the vertical partition 6 is provided with an exhaust pipe 62. The exhaust pipe 62 is provided with a third on-off valve 621. The third on-off valve 621 is a ball valve or a globe valve, etc. One end of the exhaust pipe 62 far from the vertical partition 6 is provided with a pneumatic joint 622. The inside of the vertical partition 6 is evacuated by a vacuum pump so that heat transfer between the waters at different temperatures on both sides of the vertical partition 6 is not easy. In addition, to facilitate observing the vacuum state inside the vertical partition 6, a vacuum pressure gauge can be provided at the top of the vertical partition 6 for monitoring.

[0048] Refer to Figure 6 , grooves 63 are provided at the bottom and both sides of the vertical partition 6. The grooves 63 at the bottom and both sides of the vertical partition 6 communicate with each other. Each groove 63 of the vertical partition 6 is provided with a flexible water-absorbing filling material 64. The flexible water-absorbing filling material 64 is a water-absorbing sponge or stacked fabrics or non-woven fabrics. The bottom and both sides of the vertical partition 6 are abutted against the inner wall of the first separation tank 22 through the flexible water-absorbing filling material 64. The flexible water-absorbing filling material can hinder the convection of the water on both sides of the vertical partition 6 and is not likely to cause jamming problems for the sliding of the vertical partition 6.

[0049] Refer to Figure 6 , the vertical partition 6 is provided with a communication port 65. A sealing plate 66 is hinged on one side of the vertical partition 6 far from the bypass pipe 411. The sealing plate 66 closes the communication port 65 in the hanging state; a reciprocating driving mechanism 7 is installed on the top surface of the first separation tank 22. The reciprocating driving mechanism 7 is a hydraulic cylinder, an electric cylinder or a linear module, etc. The reciprocating driving mechanism 7 is located on one side of the vertical partition 6 far from the bypass pipe 411. A traction rope 71 is connected between the reciprocating driving mechanism 7 and the sealing plate 66; the water inlet ends of the bypass pipe 411 and the cold-end water pipeline 41 are located on one side of the vertical partition 6, and the first siphon 501 is located on the other side of the vertical partition 6.

[0050] Since the water inlet end of the cold-end water pipeline 41 of the heat pump unit 4 and the bypass pipe 411 are located on the same side of the vertical partition 6, when the bypass pipe 411 is opened, the cold-end water pipeline 41 of the heat pump unit 4 can circulate and drain the water on one side of the vertical partition 6 in the first separation tank 22. When the bypass pipe 411 is closed, the cold-end drain pipeline of the heat pump unit 4 drains the water in the first separation tank 22 into the cooling water tank 1. During this process, the amount of water on the side of the vertical partition 6 close to the bypass pipe 411 gradually decreases. At the same time, the first siphon 501 sucks the water in the first main separation tank 21 into the side of the first separation tank 22 far from the bypass pipe 411 for replenishment. And during this process, the vertical partition 6 can move adaptively towards the water inlet of the cold-end water pipeline 41, reducing the mixing of the waters at different temperatures on both sides of the vertical partition 6.

[0051] After the second partition tank 32 is filled with water, the reciprocating driving mechanism 7 slowly drives the vertical partition 6 to move in the reverse direction through the traction rope 71. During this process, the traction rope 71 forces the sealing plate to rotate upward and leave the communication port 65, enabling the water on the side of the vertical partition 6 close to the first siphon 501 to flow to the other side. When the vertical partition 6 moves back to its original position and the water levels on both sides of the vertical partition 6 are the same, the reciprocating driving mechanism 7 is reset, thereby causing the reciprocating driving mechanism 7 to release the traction rope 71 and the sealing plate 66, and the sealing plate 66 closes the communication port 65 again.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A water recycling system, characterized in that: The invention comprises a cooling water pool (1), a cooling return water pool (2) and a condensing return water pool (3), wherein the water temperature of the cooling water pool (1) is lower than the water temperature of the cooling return water pool (2), and the water temperature of the cooling return water pool (2) is lower than the water temperature of the condensing return water pool (3); the cooling return water pool (2) is provided with a first main compartment (21) and a first compartment (22), the volume of the first main compartment (21) is larger than the volume of the first compartment (22), the condensing return water pool (3) is provided with a second main compartment (31) and a second compartment (32), the volume of the second main compartment (31) is larger than the volume of the second compartment (32); the first main compartment (21) and the second main compartment (31) are used to supply water to the dyeing and finishing equipment, the first compartment (22) and the second compartment (32) are connected to each other. A heat pump group (4) is provided between the compartments (32), the heat pump group (4) comprising a cold end water supply pipeline (41) and a hot end water supply pipeline (42), the water inlet end of the cold end water supply pipeline (41) being connected to the first compartment (22), and the water inlet end of the hot end water supply pipeline (42) being connected to the second compartment (32); a first siphon tube (501) is provided between the first main compartment (21) and the first compartment (22), the port of the first siphon tube (501) being connected to the first main compartment (21) being higher than the other port; a second siphon tube (502) is provided between the second main compartment (31) and the second compartment (32), the port of the second siphon tube (502) being connected to the second main compartment (31) being higher than the other port.

2. A water recycling system according to claim 1, characterized in that: The water outlet end of the cold end water supply pipeline (41) is connected to the cooling water pool (1).

3. A water recycling system according to claim 1, characterized in that: The drainage water level of the first main compartment (21) is higher than the drainage water level of the first primary compartment (22), and the drainage water level of the second main compartment (31) is higher than the drainage water level of the second secondary compartment (32).

4. A water recycling system according to claim 1, characterized in that: A bypass pipe (411) is provided at the outlet pipe section of the cold end water supply pipeline (41), the bypass pipe (411) extends into the first isolation tank (22), and the bypass pipe (411) is provided with a first switch valve (412).

5. A water recycling system according to claim 4, characterized in that: The first switch valve (412) is a three-way valve, the inner cavity of the three-way valve is connected to the water inlet end of the cold-end water supply pipeline (41), and the three-way valve is connected to the bypass pipe (411) and the water outlet end of the cold-end water supply pipeline (41) in an alternating switching manner.

6. A water recycling system according to claim 4, characterized in that: A vertical partition (6) is provided in the first partition (22), and the vertical partition (6) can slide in the horizontal direction. There is friction damping between the vertical partition (6) and the inner wall of the first partition (22), and the sliding direction of the vertical partition (6) is perpendicular to the vertical partition (6); the vertical partition (6) is provided with a connecting port (65), and a sealing plate (66) is hingedly provided on one side of the vertical partition (6) away from the bypass pipe (411), and the sealing plate (66) closes the bypass pipe (411) in a suspended state. a connecting port (65); a reciprocating drive mechanism (7) is installed on the top surface of the first partition (22); the reciprocating drive mechanism (7) is located on a side of the vertical partition (6) away from the bypass pipe (411); a traction rope (71) is connected between the reciprocating drive mechanism (7) and the sealing plate (66); the bypass pipe (411) and the water inlet end of the cold end water supply pipeline (41) are located on one side of the vertical partition (6); and the first siphon pipe (501) is located on the other side of the vertical partition (6).

7. A water recycling system according to claim 6, characterized in that: The vertical partition (6) is a hollow shell structure, the interior of the vertical partition (6) is evacuated, an exhaust pipe (62) is provided at the top of the vertical partition (6), the exhaust pipe (62) is provided with a third switch valve (621), and the exhaust pipe (62) is provided with a pneumatic joint (622).

8. A water recycling system according to claim 6, characterized in that: The bottom and both sides of the vertical partition (6) are provided with grooves (63), the grooves (63) at the bottom and both sides of the vertical partition (6) are interconnected, each groove (63) of the vertical partition (6) is provided with a flexible water-absorbing filling material (64), and the bottom and both sides of the vertical partition (6) abut against the inner wall of the first partition (22) through the flexible water-absorbing filling material (64).

9. The water recycling system according to claim 1, characterized in that: The first siphon tube (501) and the second siphon tube (502) are siphon tubes (5) of the same structure. The siphon tube (5) is provided with a water injection riser (51). The water injection riser (51) is arranged upwards and is provided with a second switch valve (53).

10. A water recycling system according to claim 9, characterized in that: A movable sealing member (52) is provided at one end of the siphon tube (5), and the movable sealing member (52) is used to close the end of the siphon tube (5); the movable sealing member (52) of the first siphon tube (501) is located in the first main compartment (21), and the movable sealing member (52) of the second siphon tube (502) is located in the second main compartment (31).

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