Membrane distillation seawater desalination system utilizing waste heat of CPU (central processing unit) of supercomputing center

Abstract

The invention discloses a membrane distillation seawater desalination system utilizing waste heat of a central processing unit (CPU) of a supercomputing center. The heat collection unit is located in the seawater circulation unit, the seawater circulation unit is used for storing seawater, a heat conduction copper pipe in the heat collection unit is arranged in the seawater of the seawater circulation unit, CPU waste heat in the heat collection unit is used for heating the seawater, and the membrane distillation unit is located between the seawater circulation unit and the fresh water circulation collection unit. The two sides of the membrane distillation unit are communicated with the seawater circulating unit and the fresh water circulating and collecting unit respectively, the membrane distillation unit is used for desalting seawater in the seawater circulating unit, and the desalted seawater is collected by the fresh water circulating and collecting unit. A large amount of waste heat generated by the CPU is used as a heat source, seawater containing inorganic salt is evaporated, condensed and desalinated, the waste heat of the CPU of the supercomputer center is effectively utilized, and the cost of membrane distillation seawater desalination is reduced.

Description

Technical Field

[0001] The invention belongs to the field of seawater desalination, and in particular relates to a membrane distillation seawater desalination system utilizing waste heat of a CPU of a supercomputing center. Background Art

[0002] In recent years, there are a large number of supercomputing centers that have been built or are under construction in coastal areas, which are widely distributed in coastal cities such as Tianjin, Shenzhen, Guangzhou, Shanghai, Qingdao, and Dalian. At the same time, the construction of the digital economy is in full swing, and the rapid innovation and application of digital technologies such as mobile Internet, big data, and artificial intelligence have been deeply promoted, becoming the "No. 1 development project" for implementing digital economic innovation and quality improvement. However, the digital economy must rely on the powerful computing resources of supercomputing centers. These supercomputing centers will generate a lot of waste heat when providing computing power, but this waste heat is usually discharged through the cooling system, with low quality and difficult to use. This part of waste heat is wasted while consuming a lot of energy. According to relevant information, the waste heat temperature of data centers is relatively high, and with the increase in big data applications and the promotion of liquid cooling technology, waste heat resources will only increase and not decrease. At the same time, the coastal areas where these supercomputing centers are located are relatively developed in economy, with a large demand for industrial water. Many high-water-consuming industries such as electricity, petrochemicals, and steel are concentrated, and the water demand of these industries has put tremendous pressure on local water resources. Summary of the invention

[0003] In order to solve the problems existing in the background technology, the purpose of the present invention is to provide a membrane distillation seawater desalination system that utilizes the waste heat of the CPU of a supercomputing center. The present invention uses the large amount of waste heat generated by the CPU as a heat source to evaporate and condense seawater containing inorganic salts, which not only effectively utilizes the waste heat of the CPU of the supercomputing center, but also reduces the cost of membrane distillation seawater desalination.

[0004] The technical solution adopted by the present invention is:

[0005] The system includes a seawater circulation unit, a heat collection unit, a membrane distillation unit and a fresh water circulation collection unit. The heat collection unit is located in the seawater circulation unit. The seawater circulation unit is used to store seawater. The heat-conducting copper tube in the heat collection unit is placed in the seawater of the seawater circulation unit. The membrane distillation unit is located between the seawater circulation unit and the fresh water circulation collection unit, and the two sides of the membrane distillation unit are respectively connected to the seawater circulation unit and the fresh water circulation collection unit. The membrane distillation unit is used to desalinate the seawater in the seawater circulation unit, and the desalinated seawater is collected by the fresh water circulation collection unit.

[0006] The seawater circulation unit comprises a seawater flow sensor, a seawater inlet temperature sensor, a seawater outlet temperature sensor, a saltwater pool, a seawater electronic scale and a seawater peristaltic pump; the saltwater pool is placed on the seawater electronic scale, the saltwater pool is used to store seawater, the seawater electronic scale is used to obtain the mass change of the seawater solution in the saltwater pool in real time, the output end of the saltwater pool is connected to the seawater inlet temperature sensor through a pipeline, the seawater peristaltic pump and the seawater flow sensor are sequentially arranged on the pipeline from the saltwater pool to the seawater inlet temperature sensor, and the input end of the saltwater pool is connected to the seawater outlet temperature sensor through a pipeline;

[0007] The heat-conducting copper tube in the heat collection unit is immersed in a salt water pool, and a seawater inlet temperature sensor and a seawater outlet temperature sensor are both connected to the membrane distillation unit.

[0008] The heat collection unit includes a heat-conducting copper tube, an adjustable power supply, a central processing unit, a heat collection temperature sensor, a heat-conducting block, a cooling tower, a centrifugal pump and a valve;

[0009] The adjustable power supply and the heat collection temperature sensor are both connected to the central processing unit. The adjustable power supply is used to supply power to the central processing unit. The heat collection temperature sensor is used to measure the temperature of the surface of the central processing unit. A heat conduction block is arranged between the central processing unit and the cooling tower. The heat conduction block is used to conduct the heat generated by the central processing unit to the cooling tower. The input end of the cooling tower is connected to one end of the heat-conducting copper pipe through a pipeline. A centrifugal pump is arranged on the pipeline from the input end of the cooling tower to the heat-conducting copper pipe. The output end of the cooling tower is connected to the other end of the heat-conducting copper pipe through a pipeline. A valve is arranged on the pipeline from the output end of the cooling tower to the heat-conducting copper pipe. The heat-conducting copper pipe is immersed in the seawater solution of the salt water pool, and the heat of the coolant inside the cooling tower is conducted to the seawater solution of the salt water pool, so that the temperature of the seawater solution of the salt water pool is increased. The centrifugal pump is used to provide power for the circulation of the coolant.

[0010] The membrane distillation unit comprises a seawater inlet valve, a semipermeable filter membrane, a fresh water inlet valve, a fresh water outlet valve, a membrane clamp 1, a membrane clamp 2 and a seawater outlet valve; the membrane clamp 1 and the membrane clamp 2 are tightly fitted, the semipermeable filter membrane is installed between the membrane clamp 1 and the membrane clamp 2, the two ends of the membrane clamp 1 serve as the seawater inlet and the seawater outlet of the membrane distillation unit respectively, the two ends of the membrane clamp 2 serve as the fresh water inlet and the fresh water outlet of the membrane distillation unit respectively, and the seawater inlet, seawater outlet, fresh water inlet and fresh water outlet of the membrane distillation unit are respectively provided with a seawater inlet valve, a seawater outlet valve, a fresh water inlet valve and a fresh water outlet valve;

[0011] The seawater inlet valve and the seawater outlet valve are respectively connected to the seawater inlet temperature sensor and the seawater outlet temperature sensor in the seawater circulation unit; the fresh water inlet valve and the fresh water outlet valve are respectively connected to the fresh water inlet temperature sensor and the fresh water outlet temperature sensor in the fresh water circulation collection unit.

[0012] The fresh water circulation collection unit comprises a fresh water inlet temperature sensor, a fresh water flow sensor, a fresh water peristaltic pump, a fresh water electronic scale, a fresh water pool and a fresh water outlet temperature sensor; the fresh water pool is placed on the fresh water electronic scale, the fresh water pool is used to store pure water, the fresh water electronic scale is used to obtain the quality change of pure water in the fresh water pool in real time, the output end of the fresh water pool is connected to the fresh water inlet temperature sensor through a pipeline, the pipeline from the fresh water pool to the fresh water inlet temperature sensor is sequentially provided with a fresh water peristaltic pump and a fresh water flow sensor, and the input end of the fresh water pool is connected to the fresh water outlet temperature sensor through a pipeline;

[0013] The fresh water inlet temperature sensor and the fresh water outlet temperature sensor are both connected to the membrane distillation unit.

[0014] The seawater stored in the seawater circulation unit includes an aqueous solution prepared by using industrial sodium chloride NaCl, and the seawater includes sodium ions Na+, potassium ions K+, and chloride ions Cl- inorganic salts.

[0015] The pipes in the seawater circulation unit are all wrapped with thermal insulation material, and the thermal insulation material is used to reduce the heat exchange between the seawater in the pipes and the external environment.

[0016] The membrane clamp 1 and the membrane clamp 2 both adopt air gap membrane distillation.

[0017] The semi-permeable filter membrane is a polytetrafluoroethylene (PTFE) semi-permeable filter membrane.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention uses the large amount of waste heat generated by the central processing unit CPU as the heat source to evaporate, condense and desalinate seawater containing inorganic salts, which not only effectively utilizes the waste heat of the supercomputing center CPU, but also reduces the cost of membrane distillation seawater desalination.

[0020] 2. The system of the present invention has a simple structure and is easy to prepare. It promotes the popularization of membrane distillation seawater desalination technology and effectively alleviates the problem of industrial water shortage in coastal areas.

[0021] 3. The present invention conducts the heat generated by the central processing unit to the cooling tower, and then conducts the heat of the coolant in the cooling tower to the seawater in the salt water pool through the heat-conducting copper tube, so that the temperature of the seawater in the salt water pool increases. The central processing unit uses the large amount of waste heat generated by the CPU as a heat source to evaporate, condense and desalinate the seawater containing inorganic salts, which greatly utilizes the waste heat of the CPU of the supercomputing center and is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2This is the relationship between the system water production and the inlet temperature of the seawater side of the membrane distillation unit when the salt water pool contains different concentrations of sodium chloride solution.

[0024] In the figure: 1. Seawater flow sensor; 2. Seawater inlet temperature sensor; 3. Seawater inlet valve; 4. Semi-permeable filter membrane; 5. Freshwater inlet valve; 6. Freshwater inlet temperature sensor; 7. Freshwater flow sensor; 8. Freshwater peristaltic pump; 9. Freshwater electronic scale; 10. Freshwater tank; 11. Freshwater outlet temperature sensor; 12. Freshwater outlet valve; 13. Membrane clamp 1; 14. Membrane clamp 2; 15. Seawater outlet valve; 16. Seawater outlet temperature sensor; 17. Saltwater tank; 18. Seawater electronic scale; 19. Thermal copper tube; 20. Adjustable power supply; 21. Central processing unit; 22. Seawater peristaltic pump; 23. Heat collection temperature sensor; 24. Thermal block; 25. Cooling tower; 26. Centrifugal pump; 27. Valve. DETAILED DESCRIPTION

[0025] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0026] like Figure 1 As shown, the system includes a seawater circulation unit I, a heat collection unit II, a membrane distillation unit III and a fresh water circulation collection unit IV. The heat collection unit II is located in the seawater circulation unit I. The seawater circulation unit I is used to store seawater. The heat-conducting copper tube 19 in the heat collection unit II is placed in the seawater of the seawater circulation unit I. The CPU waste heat in the heat collection unit is used to heat and evaporate the seawater. The membrane distillation unit III is located between the seawater circulation unit I and the fresh water circulation collection unit IV, and the two sides of the membrane distillation unit III are connected to the seawater circulation unit I and the fresh water circulation collection unit IV respectively. The membrane distillation unit III is used to desalinate the seawater in the seawater circulation unit I, and the desalinated seawater is collected by the fresh water circulation collection unit IV.

[0027] In the specific implementation, seawater is an aqueous solution prepared using industrial NaCl, mainly containing Na + , K + , Cl - Inorganic salts and other substances.

[0028] The seawater circulation unit I comprises a seawater flow sensor 1, a seawater inlet temperature sensor 2, a seawater outlet temperature sensor 16, a saltwater pool 17, a seawater electronic scale 18 and a seawater peristaltic pump 22; the saltwater pool 17 is placed on the seawater electronic scale 18, the saltwater pool 17 is used to store seawater (aqueous solution containing inorganic salts), the seawater electronic scale 18 is used to obtain the mass change of the seawater solution in the saltwater pool 17 in real time, the output end of the saltwater pool 17 is connected to the seawater inlet temperature sensor 2 through a PVC pipe, the seawater peristaltic pump 22 and the seawater flow sensor 1 are sequentially arranged on the pipe from the saltwater pool 17 to the seawater inlet temperature sensor 2, and the input end of the saltwater pool 17 is connected to the seawater outlet temperature sensor 16 through a PVC pipe;

[0029] The heat-conducting copper tube 19 in the heat collection unit II is immersed in the salt water pool 17, and the seawater inlet temperature sensor 2 and the seawater outlet temperature sensor 16 are both connected to the membrane distillation unit III.

[0030] The seawater peristaltic pump 22 acts between the salt water pool 17 and the seawater flow sensor 1 and does not directly contact the seawater in the PVC hose. The PVC hoses in the seawater circulation unit I are all wrapped with thermal insulation materials to reduce the heat exchange between the seawater in the pipeline and the external environment.

[0031] The heat collection unit II includes a heat-conducting copper tube 19, an adjustable power supply 20, a central processing unit 21, a heat collection temperature sensor 23, a heat-conducting block 24, a cooling tower 25, a centrifugal pump 26 and a valve 27;

[0032] The adjustable power supply 20 and the heat collection temperature sensor 23 are both connected to the central processing unit 21. The adjustable power supply 20 is used to supply power to the central processing unit 21. The heat collection temperature sensor 23 is used to measure the surface temperature of the central processing unit 21. A heat conduction block 24 is arranged between the central processing unit 21 and the cooling tower 25. The heat conduction block 24 has good thermal conductivity. Both ends are in contact with the cooling tower 25 and the central processing unit CPU21 respectively. The heat conduction block 24 is used to conduct the heat generated by the central processing unit 21 to the cooling tower 25. The cooling tower 25 has good thermal conductivity and has a curved channel inside, so that the heat and the coolant flowing inside can undergo thermal convection. To increase the temperature of the coolant, the input end of the cooling tower 25 is connected to one end of the heat-conducting copper tube 19 through a pipeline, a centrifugal pump 26 is provided on the pipeline from the input end of the cooling tower 25 to the heat-conducting copper tube 19, the output end of the cooling tower 25 is connected to the other end of the heat-conducting copper tube 19 through a pipeline, a valve 27 is provided on the pipeline from the output end of the cooling tower 25 to the heat-conducting copper tube 19, the heat-conducting copper tube 19 is immersed in the seawater solution of the salt water pool 17, and the heat of the coolant inside the cooling tower 25 is transferred to the seawater solution of the salt water pool 17, so that the temperature of the seawater solution of the salt water pool 17 is increased, and the centrifugal pump 26 is used to provide power for the circulation of the coolant.

[0033] The membrane distillation unit III includes a seawater inlet valve 3, a semipermeable filter membrane 4, a fresh water inlet valve 5, a fresh water outlet valve 12, a membrane clamp 13, a membrane clamp 2 14 and a seawater outlet valve 15; the membrane clamp 1 13 and the membrane clamp 2 14 are tightly fitted, the semipermeable filter membrane 4 is installed between the membrane clamp 1 13 and the membrane clamp 2 14, the two ends of the membrane clamp 1 13 are respectively used as the seawater inlet and the seawater outlet of the membrane distillation unit III, the two ends of the membrane clamp 2 14 are respectively used as the fresh water inlet and the fresh water outlet of the membrane distillation unit III, and the seawater inlet, seawater outlet, fresh water inlet and fresh water outlet of the membrane distillation unit III are respectively provided with a seawater inlet valve 3, a seawater outlet valve 15, a fresh water inlet valve 5 and a fresh water outlet valve 12;

[0034] The seawater inlet valve 3 and the seawater outlet valve 15 are respectively connected to the seawater inlet temperature sensor 2 and the seawater outlet temperature sensor 16 in the seawater circulation unit I; the fresh water inlet valve 5 and the fresh water outlet valve 12 are respectively connected to the fresh water inlet temperature sensor 6 and the fresh water outlet temperature sensor 11 in the fresh water circulation collection unit IV.

[0035] Flat channels are left inside membrane clamp 1 13 and membrane clamp 2 14, and air gap membrane distillation is adopted. Membrane clamp 1 13 and membrane clamp 2 14 are tightly fitted together, and seawater solution cannot directly pass through membrane clamps 13 and 14 without contacting semipermeable filter membrane 4. Semipermeable filter membrane 4 adopts polytetrafluoroethylene (PTFE) semipermeable filter membrane, which has strong hydrophobicity, ensuring unimpeded passage of water vapor while preventing seawater from penetrating, and is clamped by membrane clamps 13 and 14 on the left and right sides.

[0036] The fresh water circulation collection unit IV includes a fresh water inlet temperature sensor 6, a fresh water flow sensor 7, a fresh water peristaltic pump 8, a fresh water electronic scale 9, a fresh water tank 10 and a fresh water outlet temperature sensor 11; the fresh water tank 10 is placed on the fresh water electronic scale 9, the fresh water tank 10 is used to store pure fresh water, the fresh water electronic scale 9 is used to obtain the quality change of the pure fresh water in the fresh water tank 10 in real time, the output end of the fresh water tank 10 is connected to the fresh water inlet temperature sensor 6 through a PVC pipe, the fresh water peristaltic pump 8 and the fresh water flow sensor 7 are sequentially arranged on the pipe from the fresh water tank 10 to the fresh water inlet temperature sensor 6, and the input end of the fresh water tank 10 is connected to the fresh water outlet temperature sensor 11 through a PVC pipe;

[0037] The fresh water inlet temperature sensor 6 and the fresh water outlet temperature sensor 11 are both connected to the membrane distillation unit III.

[0038] The fresh water peristaltic pump 8 acts between the fresh water tank 10 and the fresh water flow sensor 7 and does not directly contact the fresh water in the hose.

[0039] The seawater stored in the seawater circulation unit I includes an aqueous solution prepared using industrial sodium chloride NaCl, and the seawater includes substances such as sodium ions Na+, potassium ions K+, and chloride ions Cl- inorganic salts.

[0040] The PVC soft pipes in the seawater circulation unit I are all wrapped with thermal insulation materials, which are used to reduce the heat exchange between the seawater in the pipes and the external environment.

[0041] Both membrane clamp 1 13 and membrane clamp 2 14 adopt air gap membrane distillation.

[0042] The semi-permeable filter membrane 4 is made of polytetrafluoroethylene (PTFE) semi-permeable filter membrane, which has strong hydrophobicity, ensuring that water vapor can pass through without obstruction while seawater cannot pass through.

[0043] The embodiment of the present invention comprises the following steps:

[0044] The relationship between the desalination water output of the system and the temperature change of the seawater inlet side is explored when the salt water pool contains pure water, 1%, 3.5%, and 6% sodium chloride solution respectively:

[0045] Step 1: Install a 12cm×6cm polytetrafluoroethylene (PTFE) semi-permeable filter membrane 4 between the membrane fixtures 14 and 13 on the left and right sides of the membrane distillation unit III, fill the salt water pool 17 with 3.5% sodium chloride solution to ensure that the heat-conducting copper tube 19 is submerged, and inject a certain amount of pure water into the fresh water pool 10;

[0046] Step 2: After setting the predetermined speed, turn on the seawater peristaltic pump 22 of the seawater circulation unit I and the freshwater peristaltic pump 8 of the freshwater circulation collection unit IV, so that the flow rate of the seawater end flow sensor 1 and the freshwater end flow sensor 7 are both maintained at 600 mL / min, and after waiting for the seawater circulation and the freshwater circulation to run stably, turn on the adjustable power supply 20 connected to the central processing unit 21, the CPU central processing unit 21 continuously generates heat by itself, and the heat-conducting block 24 on the surface conducts the heat to the cooling tower 25, turn on the centrifugal pump 26 of the heat collection unit II, and the cooling tower 25 uses the conducted heat to heat the internal circulating coolant. In particular, the pipes immersed in the seawater pool are made of copper, and the aqueous solution in the salt water pool 17 flows and takes away the heat of the coolant in the heat-conducting copper pipe 19, thereby increasing the temperature of the seawater. Initially, the fresh water inlet temperature of the membrane distillation unit is maintained at 15°C;

[0047] Step 3: After the temperature sensor values ​​2, 6, 11, and 16 are stabilized at the specified values, the current temperature values ​​of the seawater end and the freshwater end are recorded according to the readings of the temperature sensors at the seawater end and the freshwater end, and the temperature difference between the saltwater end and the freshwater end is calculated;

[0048] Step 4: After a period of time, according to the reading of the fresh water electronic scale 9 below the fresh water pool, record the mass of fresh water added in the fresh water pool 10 during the same period of time, and calculate the rate of increase of fresh water;

[0049] Step 5: Keep the speed of the centrifugal pump 26 of the heat collection unit II unchanged. Change the power of the adjustable power supply 20, that is, change the heating power of the central processor 21, so that the reading of the seawater inlet temperature sensor 2 increases by 5°C each time, which are 35°C, 40°C, 45°C, 50°C, 55°C, and 60°C respectively.

[0050] Next, repeat step 3 without repeatedly starting the centrifugal pump 26;

[0051] Step 6: According to the seawater inlet temperature sensor 2 and the area of ​​the polytetrafluoroethylene (PTFE) semi-permeable filter membrane 4, the water production per unit time per unit membrane area, i.e., the water flux, is calculated, and by comparing the water production rates at different temperature differences at both ends of the membrane, the relationship between the seawater desalination water production of the system and the change in the seawater inlet temperature is obtained;

[0052] Step 7: After adding pure water, 1% and 6% sodium chloride solutions into the seawater pool, repeat steps 2 to 6.

[0053] Through experiments, we measured multiple sets of data on the water flux of the membrane distillation unit under different temperature differences at both ends of the membrane when the seawater pool contained pure water, 1%, 3.5%, and 6% sodium chloride solution, respectively. In order to compare the fresh water yield of water molecules passing through the membrane under different temperature differences and flow rates of seawater and fresh water at both ends of the membrane, we defined the water flux j v (kg / m 2 h) The calculation formula is:

[0054]

[0055] Among them, M (kg) is the mass of fresh water produced during the experiment, S (m 2 ) is the membrane area, and the size of the polytetrafluoroethylene semipermeable filter membrane used in the experiment is 12 cm × 6 cm, and Δt (h) is the running time.

[0056] By fitting the experimental results, we get Figure 2 The linear results shown in the figure show that when the fresh water inlet temperature is kept at 15°C, only the seawater inlet temperature is changed, and the 3.5% concentration is closest to the actual seawater concentration. The fresh water production rate increases significantly with increasing temperature, and as the solution concentration increases, the osmotic pressure increases, resulting in a decrease in water production rate and water flux.

[0057] By comparing and analyzing other methods of recycling the waste heat from the CPU of the supercomputing center, it was found that a small number of methods of recycling the waste heat from the CPU of the supercomputing center and using it for centralized heating have low utilization efficiency and poor economic benefits. In comparison, utilizing the waste heat from the CPU of the supercomputing center for membrane distillation seawater desalination not only meets the temperature requirements of the hot end of membrane distillation seawater desalination, but also conforms to the actual situation of local water shortage, can effectively alleviate the shortage of local industrial water, and has high utilization efficiency and economic benefits.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A membrane distillation seawater desalination system using the waste heat of the CPU of a supercomputing center, characterized in that: The invention comprises a seawater circulation unit, a heat collection unit, a membrane distillation unit and a fresh water circulation collection unit. The heat collection unit is located in the seawater circulation unit. The seawater circulation unit is used to store seawater. The heat-conducting copper tube (19) in the heat collection unit is placed in the seawater of the seawater circulation unit. The membrane distillation unit is located between the seawater circulation unit and the fresh water circulation collection unit. The two sides of the membrane distillation unit are respectively connected to the seawater circulation unit and the fresh water circulation collection unit. The membrane distillation unit is used to desalinate the seawater in the seawater circulation unit. The desalinated seawater is collected by the fresh water circulation collection unit.

2. The membrane distillation seawater desalination system using the waste heat of the CPU of the supercomputing center according to claim 1, characterized in that: The seawater circulation unit comprises a seawater flow sensor (1), a seawater inlet temperature sensor (2), a seawater outlet temperature sensor (16), a salt water pool (17), a seawater electronic scale (18) and a seawater peristaltic pump (22); the salt water pool (17) is placed on the seawater electronic scale (18), the salt water pool (17) is used to store seawater, the seawater electronic scale (18) is used to obtain the mass change of the seawater solution in the salt water pool (17) in real time, the output end of the salt water pool (17) is connected to the seawater inlet temperature sensor (2) through a pipeline, the seawater peristaltic pump (22) and the seawater flow sensor (1) are arranged in sequence on the pipeline from the salt water pool (17) to the seawater inlet temperature sensor (2), and the input end of the salt water pool (17) is connected to the seawater outlet temperature sensor (16) through a pipeline; The heat-conducting copper tube (19) in the heat collection unit is immersed in the salt water pool (17), and the seawater inlet temperature sensor (2) and the seawater outlet temperature sensor (16) are both connected to the membrane distillation unit.

3. The membrane distillation seawater desalination system using the waste heat of the CPU of the supercomputing center according to claim 1 is characterized in that: The heat collection unit comprises a heat-conducting copper tube (19), an adjustable power supply (20), a central processing unit (21), a heat collection temperature sensor (23), a heat-conducting block (24), a cooling tower (25), a centrifugal pump (26) and a valve (27); The adjustable power supply (20) and the heat collection temperature sensor (23) are both connected to the central processing unit (21). The adjustable power supply (20) is used to supply power to the central processing unit (21). The heat collection temperature sensor (23) is used to measure the surface temperature of the central processing unit (21). A heat conduction block (24) is provided between the central processing unit (21) and the cooling tower (25). The heat conduction block (24) is used to conduct the heat generated by the central processing unit (21) to the cooling tower (25). The input end of the cooling tower (25) is connected to one end of the heat conduction copper pipe (19) through a pipeline. A centrifugal pump (26) is arranged on the pipeline from the input end of the cooling tower (25) to the heat-conducting copper tube (19); the output end of the cooling tower (25) is connected to the other end of the heat-conducting copper tube (19) through a pipeline; a valve (27) is arranged on the pipeline from the output end of the cooling tower (25) to the heat-conducting copper tube (19); the heat-conducting copper tube (19) is immersed in the seawater solution of the salt water pool (17) and conducts the heat of the coolant inside the cooling tower (25) to the seawater solution of the salt water pool (17), so that the temperature of the seawater solution in the salt water pool (17) is increased; the centrifugal pump (26) is used to provide power for the circulation of the coolant.

4. The membrane distillation seawater desalination system using the waste heat of the CPU of the supercomputing center according to claim 1, characterized in that: The membrane distillation unit comprises a seawater inlet valve (3), a semipermeable filter membrane (4), a fresh water inlet valve (5), a fresh water outlet valve (12), a membrane clamp 1 (13), a membrane clamp 2 (14) and a seawater outlet valve (15); the membrane clamp 1 (13) and the membrane clamp 2 (14) are tightly fitted, the semipermeable filter membrane (4) is installed between the membrane clamp 1 (13) and the membrane clamp 2 (14), the two ends of the membrane clamp 1 (13) serve as the seawater inlet and the seawater outlet of the membrane distillation unit respectively, the two ends of the membrane clamp 2 (14) serve as the fresh water inlet and the fresh water outlet of the membrane distillation unit respectively, and the seawater inlet, seawater outlet, fresh water inlet and fresh water outlet of the membrane distillation unit are respectively provided with a seawater inlet valve (3), a seawater outlet valve (15), a fresh water inlet valve (5) and a fresh water outlet valve (12); The seawater inlet valve (3) and the seawater outlet valve (15) are respectively connected to the seawater inlet temperature sensor (2) and the seawater outlet temperature sensor (16) in the seawater circulation unit; the fresh water inlet valve (5) and the fresh water outlet valve (12) are respectively connected to the fresh water inlet temperature sensor (6) and the fresh water outlet temperature sensor (11) in the fresh water circulation collection unit.

5. The membrane distillation seawater desalination system using the waste heat of the CPU of the supercomputing center according to claim 1, characterized in that: The fresh water circulation collection unit comprises a fresh water inlet temperature sensor (6), a fresh water flow sensor (7), a fresh water peristaltic pump (8), a fresh water electronic scale (9), a fresh water tank (10) and a fresh water outlet temperature sensor (11); the fresh water tank (10) is placed on the fresh water electronic scale (9), the fresh water tank (10) is used to store pure water, the fresh water electronic scale (9) is used to obtain the quality change of the pure water in the fresh water tank (10) in real time, the output end of the fresh water tank (10) is connected to the fresh water inlet temperature sensor (6) through a pipeline, the fresh water peristaltic pump (8) and the fresh water flow sensor (7) are arranged in sequence on the pipeline from the fresh water tank (10) to the fresh water inlet temperature sensor (6), and the input end of the fresh water tank (10) is connected to the fresh water outlet temperature sensor (11) through a pipeline; The fresh water inlet temperature sensor (6) and the fresh water outlet temperature sensor (11) are both connected to the membrane distillation unit.

6. The membrane distillation seawater desalination system using the waste heat of the CPU of the supercomputing center according to claim 1, characterized in that: The seawater stored in the seawater circulation unit includes an aqueous solution prepared by using industrial sodium chloride NaCl, and the seawater includes sodium ions Na+, potassium ions K+, and chloride ions Cl- inorganic salts.

7. The membrane distillation seawater desalination system using the waste heat of the CPU of the supercomputing center according to claim 1, characterized in that: The pipes in the seawater circulation unit are all wrapped with thermal insulation material, and the thermal insulation material is used to reduce the heat exchange between the seawater in the pipes and the external environment.

8. The membrane distillation seawater desalination system using the waste heat of the CPU of the supercomputing center according to claim 1, characterized in that: The membrane clamp one (13) and the membrane clamp two (14) both adopt air gap membrane distillation.

9. The membrane distillation seawater desalination system using the waste heat of the CPU of the supercomputing center according to claim 1, characterized in that: The semi-permeable filter membrane (4) is a polytetrafluoroethylene (PTFE) semi-permeable filter membrane.

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