Three-water-level spiral pipe winding cooling system for producing nano metal powder

Abstract

The invention discloses a three-water-level spiral pipe winding cooling system for producing nano metal powder. The three-water-level spiral pipe winding cooling system comprises a water pump A, a water pump B, a cooling control system, a temperature sensor tCa, a temperature sensor tBa, a temperature sensor tAa, a temperature sensor tEa, a temperature sensor tFa and a connecting pipe. The cooling device is characterized by further comprising a water tank overlapping and clamping heat exchanger, a liquid cavity wall bottomless barrel heat dissipation tower, a low-position spiral cooling pipe, a middle-position spiral cooling pipe and a high-position spiral cooling pipe. The device has the beneficial effects that the spiral cooling pipe, the liquid cavity wall bottomless barrel heat dissipation tower and the water tank stacked heat exchanger are simple and convenient in structure, easy to manufacture and low in cost; breakage and leakage are not prone to occurring, and the failure rate is low; the service life is long, the performance is stable, energy is saved, and heat dissipation efficiency is high; therefore, the production cost for manufacturing the nano metal powder can be reduced, the quality and production efficiency of the nano metal powder can be improved, popularization and application of the nano metal powder can be promoted, the requirements of all walks of life for the nano metal powder are met, and technical development of all walks of life is promoted.

Description

Technical Field

[0001] The invention relates to production equipment for manufacturing nano metal powder, in particular to a three-water-level spiral tube cooling system for producing nano metal powder. Background Art

[0002] With the development of science and technology and the progress of the times, the application of nanometal materials in high-tech fields is becoming more and more extensive, especially nanometal powder, which is widely used in antibacterial and antiviral, medical diagnosis and imaging high-end medical equipment, drug delivery, grinding and polishing, aerospace, 3D printing, catalysis, functional ceramics, electronics, new energy, precision instruments, precision manufacturing and other fields.

[0003] There are many methods for preparing nano-metal powders, mainly physical vapor deposition, electric explosion, mechanical crushing, etc.; among them, physical vapor deposition, also known as evaporation condensation, is a relatively mature method for manufacturing nano-metal powders, and the particle size of the manufactured nano-metal powder products reaches 5-10nm; the normal evaporation condensation method for producing nano-metal powders is to heat the metal material to a high temperature in a high-temperature evaporation furnace to form metal vapor, and then introduce the metal vapor into a condensation device, and use an inert gas to quench and condense the metal vapor, thereby generating nano-metal powders with fine particles.

[0004] In the past years of production practice in manufacturing nano-metal powder, we have found that there are many production technology problems, production efficiency problems and problems that cause product quality defects in manufacturing nano-metal powder products, especially in the collection of powder in the manufacture of nano-metal powder. There are many defects and problems, including: due to poor temperature control, the intersection of metal vapor and condensing gas is uneven, so that some metal vapor and inert gas are scattered and cannot intersect and condense; the temperature of the condensation device is not appropriate, resulting in uneven size of condensed nanoparticles; the generated nano-metal powder product is of poor quality; resulting in low efficiency of condensation into nano-metal powder; the heat exchanger has a complex structure, high manufacturing precision and high manufacturing cost; the heat exchange temperature is unstable; due to the uneven water flow of the heat exchanger, water flows in some places and does not flow in other places, resulting in unstable temperature control and low conversion efficiency; the failure rate of the heat exchanger is high, resulting in low quality of nano-metal powder, frequent shutdowns for maintenance, unstable production system of nano-metal powder, low production efficiency and other problems.

[0005] In many years of production practice, we found that the finned wave tubes of the heat exchanger in the existing technology have a complex structure. When exchanging heat with the water in the water tank, they are easily corroded, damaged, and leaked, resulting in frequent production stops, repairs of the finned wave tubes, and then resumption of production after welding repairs. After a period of production, the finned wave tubes are corroded by water or heat dissipation liquid, damaged, and leaked, and the cycle of repeated suspension, repair, and resumption of production is repeated; resulting in low production efficiency, unstable quality, and high production costs of nano-metal powders, which makes my country's nano-metal powder industry have low production efficiency, high product prices, and cannot be well promoted and advanced applications; in order to solve the technical pain points, we organized many years of practical experience and technical R&D personnel, through repeated experiments, tests and trial comparisons and analyses, and carried out a lot of design, testing, trial, optimization and improvement and other creative research work. Summary of the invention

[0006] Through long and arduous research and development efforts, the present invention provides a three-water-level spiral tube cooling system for producing nano metal powders, which can solve the technical problems mentioned in the background technology.

[0007] The technical solution to the technical problem of the present invention is as follows: a three-water-level spiral tube cooling system for producing nano-metal powders comprises a water tank stacked heat exchanger, a liquid cavity wall bottomless tube heat dissipation tower, a water pump A, a water pump B, a low-level spiral cooling pipe, a middle-level spiral cooling pipe, a high-level spiral cooling pipe, and a cooling control system; the upper part of the middle-level spiral cooling pipe is connected to the high-level spiral cooling pipe installed in the high-level condensing device, and the lower part is connected to the low-level spiral cooling pipe installed in the low-level buffer powder gathering tank, and the upper end level of the low-level spiral cooling pipe is lower than the lower end level of the middle-level spiral cooling pipe; The horizontal height of the lower end of the high-level spiral cooling pipe is higher than the horizontal height of the upper end of the middle-level spiral cooling pipe; its cooling characteristics are: cooling water spirally flows from the low water level end of the low-level spiral cooling pipe to the high water level end, and then spirally flows from the low water level end of the middle-level spiral cooling pipe to the high water level end, and then spirally flows from the low water level end of the high-level spiral cooling pipe to the high water level end; the cooling water output from the high water level of the high-level spiral cooling pipe is input into the water tank sandwich heat exchanger through water pump B, valve Eba, and valve Ec for hot and cold exchange, and then output to the low water level end of the low-level spiral cooling pipe for circulation. The present invention is also characterized in that: three different water points, a water tank sandwich heat exchanger, and a liquid cavity wall bottomless tube heat dissipation tower are provided. The hot water at the three water points exchanges heat energy with the water cooled by the liquid cavity wall bottomless tube heat dissipation tower through the water tank sandwich heat exchanger, thereby forming a high-level spiral cooling tube, a middle-level spiral cooling tube, and a low-level spiral cooling tube for the three different water points to produce a cooling effect, thereby achieving a continuous cooling effect and cooling effect on the low-level buffer powder gathering tank, the middle-level condensation and filtration device, and the high-level condensation device; and different gradual cooling effects can be produced on the three water points in a natural and sequential manner, so that the low-level buffer powder gathering tank, the middle-level condensation and filtration device, and the high-level condensation device can be cooled. The filtering device and the high-position condensing device form a stepped cooling effect, that is, the temperature of the middle spiral cooling tube is lower than that of the high-position spiral cooling tube, and the temperature of the low-position spiral cooling tube is lower than that of the middle spiral cooling tube; such cooling effect enables the high-position condensing device, the middle condensation filtering device, and the low-position buffer powder gathering tank to have high condensation efficiency for metal vapor and uniform formation of nano powder particles, and such cooling method and structure greatly reduce the electric energy consumed by energy conversion cooling, and better still, save manufacturing costs, have low failure rate, and long service life, and can reduce the cost of nano metal powder production, and promote the quality improvement and production efficiency improvement of nano metal powder production; The cooling method and structure of the present invention greatly reduce the electric energy consumed by energy conversion cooling, better save the cost in the production process, and have a low failure rate and a long service life. It can reduce the cost of nano metal powder production, improve the quality and production efficiency of nano metal powder production, and promote the popularization and application of nano metal powder.

[0008] The water tank sandwich heat exchanger is provided with four layers of heat dissipation tanks and two layers of cooling tanks, the heat dissipation tanks sandwich the cooling tanks, the second layer of cooling water tanks are sandwiched between the first layer of heat dissipation liquid tanks and the third layer of heat dissipation liquid tanks, and the fifth layer of cooling water tanks are sandwiched between the fourth layer of heat dissipation liquid tanks and the sixth layer of heat dissipation liquid tanks; the cooling water of the second layer of cooling water tanks and the fifth layer of cooling water tanks is heat exchanged with the cooling liquid of the first layer of heat dissipation liquid tanks and the third layer of heat dissipation liquid tanks, the fourth layer of heat dissipation liquid tanks and the sixth layer of heat dissipation liquid tanks; because the cooling liquid of the first layer of heat dissipation liquid tanks and the third layer of heat dissipation liquid tanks, the fourth layer of heat dissipation liquid tanks and the sixth layer of heat dissipation liquid tanks sandwiches the cooling water of the second layer of cooling water tanks and the fifth layer of cooling water tanks, the heat exchange efficiency is high, and the structure is simple, so that the failure rate is low, the maintenance cost is low, the production cost is low, the cooling performance is stable, and the service life is long.

[0009] The liquid cavity wall bottomless tube heat dissipation tower comprises an outer wall vertical tube, an inner wall vertical tube, an annular heat dissipation liquid ring groove, a heat dissipation airflow cylinder cavity, an upper tower vent, a lower tower vent, a ventilation tower frame, a heat dissipation liquid output port, a heat dissipation liquid input port, a heat dissipation airflow flow direction, a temperature sensor tFa, a valve Eba, an annular bottom wall, and an annular cover wall; the structural characteristics of the liquid cavity wall bottomless tube heat dissipation tower are: it is an upright circular straight-through hollow cylinder structure, the hollow part is a ventilated heat dissipation airflow cylinder cavity, a ventilation tower frame is arranged at the bottom, a double-layer tube wall hollow structure is formed by an outer wall vertical tube and an inner wall vertical tube, an annular heat dissipation liquid ring groove is arranged between the outer wall vertical tube and the inner wall vertical tube, and heat dissipation liquid is arranged in the annular heat dissipation liquid ring groove; the lower part of the outer wall vertical tube is provided with a heat dissipation liquid input port and a lower A heat dissipation liquid outlet is provided; the heat dissipation principle is as follows: the heat dissipation liquid is input from the heat dissipation liquid input outlet, passes through the annular heat dissipation liquid groove from bottom to top, and is output from the heat dissipation liquid outlet; the air enters from the lower end of the heat dissipation air flow cylinder cavity and is discharged from the upper end, thereby generating a heat dissipation effect on the heat dissipation liquid in the inner wall vertical cylinder and the heat dissipation liquid groove; at the same time, the outer wall vertical cylinder contacts the outer air to generate a heat dissipation effect on the heat dissipation liquid in the heat dissipation liquid groove; at the same time, the inner wall vertical cylinder contacts the inner circle air to generate a heat dissipation effect on the heat dissipation liquid in the heat dissipation liquid groove; and the heat dissipation effect and effect can be generated in an infinite cycle; there is no need for electric energy or other energy sources to drive the airflow, and the pressure difference at different heights is used to make the heat dissipation airflow cylinder cavity automatically generate airflow, which has the beneficial effects of saving energy and reducing environmental pollution.

[0010] The cooling control system includes a single-chip microcomputer controller, a temperature sensor tAa, a temperature sensor tBa, a temperature sensor tCa, a temperature sensor tEa, a temperature sensor tFa, a water pump A, and a water pump B; the single-chip microcomputer controller includes a CPU, a power module, a network module, an A / D input module, a thyristor output module, a MAX232 module, a ROM memory, and a RAM memory; the network module of the single-chip microcomputer controller is connected to the control system; the A / D input module is connected to the temperature sensor tAa, the temperature sensor tBa, the temperature sensor tCa, the temperature sensor tEa, and the temperature sensor tFa; the thyristor output module is connected to the water pump A and the water pump B.

[0011] The electrical principle of the cooling control system is as follows: temperature sensor tAa, temperature sensor tBa, temperature sensor tCa, temperature sensor tEa, and temperature sensor tFa transmit temperature information to the A / D input module of the single-chip controller, and the CPU analyzes and processes the temperature information of each sensor converted by the A / D input module, and sends instructions for controlling the speed of water pump A and water pump B to the thyristor output module according to the upper and lower temperature limits set by the program. The thyristor output module outputs the power control amount according to the instructions of the CPU, thereby controlling the speed of water pump A and the speed of water pump B.

[0012] The working principle of the nano-metal powder production system using the present invention is as follows: the metal vapor evaporated from the metal ore by the metal evaporation furnace enters the high-level condensing device of the present invention, a part of the metal vapor in the high-level condensing device is condensed into nano-metal powder by the inert gas output by the inert gas tank and then transported to the powder collecting and anti-caking device, and a part of the metal vapor is transported to the mid-level condensation and filtration device for further condensation and filtration, and the condensed metal powder is transported to the powder collecting and anti-caking device, and the filtered inert gas is switched through the electromagnetic reversing valve and input to the filtering and returning device for further filtration; a part of the metal vapor that has not been condensed in the mid-level condensation and filtration device is transported to the low-level buffer powder gathering tank; most of the metal vapor in the low-level buffer powder gathering tank The nano-metal powder is buffer-cooled in the low-position buffer powder gathering tank and conveyed to the powder collecting and anti-caking device, and the remaining small part of the metal vapor is output to the filtering and recycling device; the filtering and recycling device further filters and separates the inert gas input by the electromagnetic reversing valve and the metal vapor input by the low-position buffer powder gathering tank, and conveys the separated inert gas to the inert gas tank and the air compressor to recycle the inert gas, and conveys the separated nano-metal powder to the powder collecting and anti-caking device; the powder collecting and anti-caking device heats and stirs the nano-metal powder input by the filtering and recycling device, the low-position buffer powder gathering tank, the middle-position condensation and filtration device, and the high-position condensation device, and then conveys it to the vacuum packaging machine, and the vacuum packaging machine packages the nano-metal powder into vacuum-packed finished nano-metal powder. Nano metal powder; the bottom end height of the high-position condensing device is higher than the center height of the middle-position condensing and filtering device, the top end height of the low-position buffer powder gathering tank is lower than the center height of the middle-position condensing and filtering device, and the top end height of the powder collecting and anti-agglomeration device is lower than the bottom end height of the high-position condensing device, the middle-position condensing and filtering device, and the low-position buffer powder gathering tank; the spiral tube of the present invention is wound in series on the outer wall of the high-position condensing device, the middle-position condensing and filtering device, and the low-position buffer powder gathering tank, and when the water of the spiral tube circulates, a gradual cooling effect can be generated, so that the temperature of the high-position condensing device, the middle-position condensing and filtering device, and the low-position buffer powder gathering tank is controlled at a temperature suitable for condensing metal vapor into nano metal powder; the control system controls the temperature and speed of the normal operation of the present invention; When the mid-level condensation and filtration device is working, the high-pressure pulse input of the inert gas in the inert gas tank is impact-condensed with the metal vapor through the air compressor and the electromagnetic reversing valve, and then the inert gas condensed with the metal powder is sent to the filtering and returning device for filtration through the electromagnetic reversing valve at intervals. After the inert gas is filtered, the filtering and returning device returns the nano-metal powder to the powder collection and anti-caking device, and at the same time returns the inert gas to the inert gas tank; the present invention is used to cool the high-level condensation device, the mid-level condensation and filtration device, and the low-level buffer powder gathering tank, so that the temperature of the high-level condensation device is controlled at 200-160 degrees, the temperature of the mid-level condensation and filtration device is controlled at 160-120 degrees, and the temperature of the low-level buffer powder gathering tank is controlled at 120-80 degrees.

[0013] The application of the present invention is to use the present invention in a nano-metal powder production system, wherein the nano-metal powder production system comprises a high-position condensing device, a mid-position condensing and filtering device, a low-position buffering powder gathering tank, a powder collecting and anti-caking device, metal ore, a metal evaporation furnace, an inert gas tank, an air compressor, a filtering and returning device, an electromagnetic reversing valve, a vacuum packaging machine, a finished nano-metal powder, the present invention, a control system, a nano-metal powder metal evaporation furnace, and metal ore; the metal vapor evaporated by the metal ore in the metal evaporation furnace enters the high-position condensing device of the present invention, and a part of the metal vapor in the high-position condensing device is condensed into gold by the inert gas in the inert gas tank. The metal vapor is transported to the powder collecting and anti-agglomeration device after it becomes nano-powder, and the other part of the metal vapor is transported to the middle-level condensation and filtration device for further condensation into metal powder and then transported to the powder collecting and anti-agglomeration device, and the other part of the metal vapor is transported to the low-level buffer powder gathering tank, and the metal vapor in the low-level buffer powder gathering tank is buffer-cooled into nano-metal powder in the low-level buffer powder gathering tank and transported to the powder collecting and anti-agglomeration device; the powder collecting and anti-agglomeration device heats and stirs the nano-metal powder in the high-level condensation device, the middle-level condensation and filtration device, and the low-level buffer powder gathering tank, and then transports it to the vacuum packaging machine, and the vacuum packaging machine packages the nano-metal powder into vacuum-packaged nano-metal powder.

[0014] The beneficial effects of the present invention are as follows: the spiral cooling tube, the liquid cavity wall bottomless tube heat dissipation tower, and the water tank stacked heat exchanger of the present invention are simple in structure, easy to manufacture, and low in cost; they are not easy to break, not easy to leak, and have a low failure rate; they have a long service life, stable performance, energy saving, and high heat dissipation efficiency; thereby reducing the production cost of manufacturing nano metal powder, improving the quality and production efficiency of nano metal powder, promoting the promotion and application of nano metal powder, benefiting all walks of life for the demand for nano metal powder, and promoting technological development in all walks of life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic diagram of the structure and working principle of a nano metal powder production system.

[0016] Figure 2 It is the structure and working principle diagram of the present invention.

[0017] Figure 3 This is the electrical schematic diagram of the cooling control system of the present invention.

[0018] The numbers in the figure are: 1. high-level condensing device; 2. mid-level condensing and filtering device; 3. low-level buffer powder gathering tank; 4. powder collecting and anti-caking device; 5. metal ore; 6. metal evaporation furnace; 7. inert gas tank; 8. air compressor; 9. filter return device; 10. electromagnetic reversing valve; 11. vacuum pump; 12. vacuum packaging machine; 13. finished nano-metal powder; 14. water tank sandwich heat exchanger; 15. liquid cavity wall bottomless tube heat dissipation tower; 16. control system; 17. nano-metal powder; 18. water pump A; 19. water pump B.

[0019] 1016. High-position spiral cooling pipe; 1028. Temperature sensor tAa; 2018. Middle-position spiral cooling pipe; 2031. Temperature sensor tBa; 302. Low-position spiral cooling pipe; 303. Temperature sensor tCa.

[0020] 83. One-way valve Ha; 84. One-way valve Hb.

[0021] 1401. First layer heat dissipation tank; 1402. Second layer cooling water tank; 1403. Third layer heat dissipation tank; 1404. Fourth layer heat dissipation tank; 1405. Fifth layer cooling water tank; 1406. Sixth layer heat dissipation tank; 1407. Main heat dissipation bottom plate; 1408. Heat exchange lower plate A; 1409. Heat exchange lower plate B; 1410. Middle right partition plate; 1411. Heat exchange upper plate A; 1412. Heat exchange upper plate B; 1413. Main heat dissipation upper plate; 1414. Middle left partition plate; 1415. Main heat dissipation left plate; 1416. Heat exchange vertical plate A; 1417. Heat exchange vertical plate B; 1418. Heat exchange vertical plate C; 1419. Heat exchange vertical plate D; 1420. Main heat dissipation right side plate; 1421. Temperature sensor tEa; 1422. Valve Ea; 1423. Valve Eb; 1424. Valve Ec; 1425. Valve Ed; 1426. Heat dissipation liquid flow direction; 1427. Cooling water flow direction.

[0022] 1501. Outer wall vertical tube; 1502. Inner wall vertical tube; 1503. Annular heat dissipation liquid groove; 1504. Heat dissipation airflow cylinder cavity; 1505. Upper air vent of tower; 1506. Lower air vent of tower; 1507. Ventilation tower; 1508. Heat dissipation liquid outlet; 1509. Heat dissipation liquid inlet; 1510. Heat dissipation airflow flow direction; 1511. Temperature sensor tFa; 1512. Valve Eba; 1513. Annular bottom wall; 1514. Annular cover wall.

[0023] 1601. Cooling control system; 1700. Connecting pipe.

[0024] Valve Eba (1512), valve Eb (1423), valve Ea (1422), valve Ec (1424), valve Ed (1425), connecting pipe (1700), temperature sensor tEa (1421), temperature sensor tFa (1511), temperature sensor tCa (303); high-position condensing device (1), middle-position condensing and filtering device (2), low-position buffer powder gathering tank (3); temperature sensor tAa (1028); temperature sensor tBa (2031). DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0026] exist Figure 2The present invention is a three-water-level spiral tube cooling system for producing nano-metal powders. The present invention comprises a water tank sandwich heat exchanger (14), a liquid chamber wall bottomless tube heat dissipation tower (15), a water pump A (18), a water pump B (19), a low-level spiral cooling pipe (302), a middle-level spiral cooling pipe (2018), a high-level spiral cooling pipe (1016), a cooling control system (1601), a valve Eba (1512), a valve Eb (1423), a valve Ea (1422), a valve Ec (1424), a valve Ed (1425), a connecting pipe (1700), a temperature sensor tEa (1421), a temperature sensor tFa (1511), a temperature sensor tCa (303), a temperature sensor The invention relates to a nano-metal powder production system, wherein the low-position spiral cooling pipe (302) is installed on the shell wall surface of the low-position buffer powder gathering tank (3) of the nano-metal powder production system; the middle-position spiral cooling pipe (2018) is installed on the shell wall surface of the middle-position condensation and filtration device (2) of the nano-metal powder production system; the high-position spiral cooling pipe (1016) is installed on the shell wall surface of the high-position condensation device (1) of the nano-metal powder production system; the temperature sensor tCa (303) is installed in the shell of the low-position buffer powder gathering tank (3) of the nano-metal powder production system; the temperature sensor tBa (2031) is installed in the shell of the middle-position condensation and filtration device (2) of the nano-metal powder production system; the The temperature sensor tAa (1028) is installed in the shell of the high-position condensing device (1) of the nano-metal powder production system; the liquid chamber wall bottomless tube heat dissipation tower (15) is provided with an outer wall vertical tube (1501), an inner wall vertical tube (1502), an annular heat dissipation liquid ring groove (1503), a heat dissipation air flow tube cavity (1504), a heat dissipation liquid output port (1508), a heat dissipation liquid input port (1509), an annular bottom wall (1513), and an annular cover wall (1514); the cooling feature is that treated pure water is used as cooling water, and the cooling water output by the water pump B (19) is input into the water tank sandwich heat exchanger (14) through the valve Eba (1512), the connecting pipe (1700), and the valve Ec (1424); the cooling After heat exchange through the water tank sandwich heat exchanger (14), the cooling water is output from the valve Eb (1423) to the low water level end of the low-level spiral cooling pipe (302); the cooling water spirally flows from the low water level end of the low-level spiral cooling pipe (302) to the high water level end, and is then transported to the low water level end of the middle-level spiral cooling pipe (2018) through the connecting pipe (1700); the cooling water spirally flows from the low water level end of the middle-level spiral cooling pipe (2018) to the high water level end, and is then transported to the low water level end of the high-level spiral cooling pipe (1016) through the connecting pipe (1700); the cooling water spirally flows from the low water level end of the high-level spiral cooling pipe (1016) to the high water level end, and is then transported to the water pump B (19) through the connecting pipe (1700) for circulation;The cooling control system (1601) performs calculation analysis and program processing based on the temperature information of the temperature sensor tCa (303), the temperature sensor tBa (2031), and the temperature sensor tAa (1028), thereby controlling the speed of the water pump B (19), thereby controlling the temperature of the low-level spiral cooling pipe (302), the middle-level spiral cooling pipe (2018), and the high-level spiral cooling pipe (1016); thereby controlling the temperature of the low-level buffer powder gathering tank (3), the middle-level condensation and filtering device (2), and the high-level condensation device (1) of the nano metal powder production system. The heat dissipation feature is that pure water or ammonia water containing 1-10% is used as the heat dissipation liquid; the heat dissipation liquid is output from the water pump A (18) and input into the water tank sandwich heat exchanger (14) through the valve Ed (1425); the heat dissipation liquid is output from the valve Ea (1422) and supplied to the liquid cavity wall bottomless tube heat dissipation tower (15) after heat exchange in the water tank sandwich heat exchanger (14); the heat dissipation liquid flows from the heat dissipation liquid input port (1509) of the liquid cavity wall bottomless tube heat dissipation tower (15) to fill the annular heat dissipation The liquid ring groove (1503) is discharged from the heat dissipation liquid outlet (1508) and then transported to the water pump A (18) through the connecting pipe (1700) for circulation; the cooling control system (1601) sets a temperature control program to control the speed of the water pump A (18) according to the temperature information collected by the temperature sensor tEa (1421) and the temperature sensor tFa (1511), thereby controlling the temperature of the water tank sandwich heat exchanger (14), thereby controlling the low-position spiral cooling tube (302 ), the middle spiral cooling tube (2018), and the high spiral cooling tube (1016); thereby controlling the temperature of the low buffer powder gathering tank (3), the middle condensation and filtration device (2), and the high condensation device (1) of the nano metal powder production system, so as to form three different water points to produce a step cooling effect, thereby realizing a step-by-step continuous cooling effect and cooling effect on the high condensation device (1), the middle condensation and filtration device (2), and the low buffer powder gathering tank (3); such a step-by-step continuous cooling effect enables the high condensation device (1), the middle condensation and filtration device (2), and the low buffer powder gathering tank (3) to have high condensation efficiency for metal vapor and uniform nano powder particle formation, thereby greatly reducing the electric energy consumed by energy conversion cooling, better saving costs in the production process, low failure rate, long service life, and can effectively reduce the cost of nano metal powder production, improve the production quality and production efficiency of nano metal powder, and promote the application and promotion of nano metal powder. ;

[0027] The cooling water spirally flows from the low water level end of the low-level spiral cooling tube (302) to the high water level end, then spirally flows from the low water level end of the middle-level spiral cooling tube (2018) to the high water level end, and then spirally flows from the low water level end of the high-level spiral cooling tube (1016) to the high water level end; the cooling water output from the high water level of the high-level spiral cooling tube (1016) is input into the water tank sandwich heat exchanger (14) through the water pump B (19), valve Eba (1512), and valve Ec (1424) for heat exchange, and then output to the low water level end of the low-level spiral cooling tube (302) for circulation.

[0028] The technical feature of the present invention is that: three different cooling water points, a water tank sandwich heat exchanger (14), and a liquid cavity wall bottomless tube heat dissipation tower (15) are provided, and the hot water at the three water points is heat-exchanged with the heat dissipation liquid of the liquid cavity wall bottomless tube heat dissipation tower (15) through the water tank sandwich heat exchanger (14), thereby forming a stepped cooling effect for the low-level spiral cooling tube (302), the middle-level spiral cooling tube (2018), and the high-level spiral cooling tube (1016) at the three different water points, that is, the cooling temperature of the low-level spiral cooling tube (302) is lower than the temperature of the middle-level spiral cooling tube (2018), and the temperature of the high-level spiral cooling tube (1016) is higher than the temperature of the middle-level spiral cooling tube (2018), thereby forming three different temperature states; thereby achieving the high-level condensation device (1), the middle-level condensation filtration device (2), and the low-level buffer powder gathering tank (3) The step-by-step cooling effect and cooling effect are achieved; the high-position condensing device (1), the middle-position condensing and filtering device (2), and the low-position buffer powder gathering tank (3) form a step-by-step cooling effect; the temperature of the middle-position condensing and filtering device (2) is lower than the temperature of the high-position condensing device (1), and the temperature of the low-position buffer powder gathering tank (3) is lower than the temperature of the middle-position condensing and filtering device (2); such a step-by-step cooling effect enables the high-position condensing device (1), the middle-position condensing and filtering device (2), and the low-position buffer powder gathering tank (3) to have high condensation efficiency for metal vapor and uniform nano powder formation, and such a cooling method and structure greatly reduce the electric energy consumed by energy conversion cooling, better save costs in the production process, have a low failure rate, and a long service life, and can reduce the cost of nano metal powder production and promote the improvement of the quality and production efficiency of nano metal powder production.

[0029] Three spiral cooling pipes are respectively installed at the three different water points, namely a low-level spiral cooling pipe (302), a middle-level spiral cooling pipe (2018), and a high-level spiral cooling pipe (1016); the high water level of the low-level spiral cooling pipe (302) is lower than the low water level of the middle-level spiral cooling pipe (2018); the high water level of the middle-level spiral cooling pipe (2018) is lower than the low water level of the high-level spiral cooling pipe (1016); and the high water level of the high-level spiral cooling pipe (1016) is the highest water level; the water flow direction is spiral flow from the low water level end of the low-level spiral cooling pipe (302) to the high water level end, then spiral flow from the low water level end of the middle-level spiral cooling pipe (2018) to the high water level end, and then spiral flow from the low water level end of the high-level spiral cooling pipe (1016) to the high water level end.

[0030] exist Figure 2 The water tank stacked heat exchanger (14) comprises a first layer of heat dissipation liquid tank (1401), a second layer of cooling water tank (1402), a third layer of heat dissipation liquid tank (1403), a fourth layer of heat dissipation liquid tank (1404), a fifth layer of cooling water tank (1405), a sixth layer of heat dissipation liquid tank (1406), a main heat dissipation bottom plate (1407), a heat exchange lower plate A (1408), a heat exchange lower plate B (1409), a middle right partition plate (1410), Heat exchange upper plate A (1411), heat exchange upper plate B (1412), main heat dissipation upper plate (1413), middle left partition (1414), main heat dissipation left plate (1415), heat exchange vertical plate A (1416), heat exchange vertical plate B (1417), heat exchange vertical plate C (1418), heat exchange vertical plate D (1419), main heat dissipation right plate (1420), temperature sensor tEa (1421), valve Ea (1422), valve Eb (1423), valve Ec (1424), valve Ed (1425), heat dissipation liquid flow direction (1426), cooling water flow direction (1427); the water tank sandwich heat exchanger (14) is provided with four layers of heat dissipation tanks and two layers of cooling tanks, the heat dissipation tanks sandwich the cooling tanks, the second layer of cooling water tanks (1402) are sandwiched between the first layer of heat dissipation liquid tanks (1401) and the third layer of heat dissipation liquid tanks (1403), the fifth layer of cooling water tanks (1405) are sandwiched between the fourth layer of heat dissipation liquid tanks (1404) and the sixth layer of heat dissipation liquid tanks (1406); the cooling water of the second layer of cooling water tanks (1402) and the fifth layer of cooling water tanks (1405) performs heat exchange with the heat dissipation liquid of the first layer of heat dissipation liquid tanks (1401) and the third layer of heat dissipation liquid tanks (1403), the fourth layer of heat dissipation liquid tanks (1404) and the sixth layer of heat dissipation liquid tanks (1406).

[0031] Technical effect: Since the heat dissipation liquid in the first layer heat dissipation liquid tank (1401), the third layer heat dissipation liquid tank (1403), the fourth layer heat dissipation liquid tank (1404) and the sixth layer heat dissipation liquid tank (1406) sandwich the cooling water in the second layer cooling water tank (1402) and the fifth layer cooling water tank (1405), the heat exchange efficiency is high and the structure is simple, thereby low failure rate, low maintenance cost, low production cost, stable cooling performance and long service life.

[0032] The structural features of the water tank sandwich heat exchanger (14) are as follows: the left end of the first layer heat dissipation liquid tank (1401) is connected to the lower end of the main heat dissipation left side plate (1415), and the right end is connected to the lower end of the main heat dissipation right side plate (1420); the left end of the main heat dissipation upper plate (1413) is connected to the upper end of the main heat dissipation left side plate (1415), and the right end is connected to the upper end of the main heat dissipation right side plate (1420); the left end of the middle left partition plate (1414) is connected to the right middle end of the main heat dissipation left side plate (1415), and the right end is connected to the left middle end of the heat exchange vertical plate A (1416); the lower end of the heat exchange vertical plate B (1417) is connected to the left end of the heat exchange lower plate B (1409), and the right end is connected to the heat exchange upper plate A (1411 ) is connected to the left end of the heat exchange vertical plate C (1418); the lower end of the heat exchange vertical plate C (1418) is connected to the right end of the heat exchange upper plate A (1411), and the upper end is connected to the right end of the heat exchange upper plate B (1412); the lower end of the heat exchange vertical plate D (1419) is connected to the right end of the heat exchange lower plate A (1408), and the upper end is connected to the right end of the heat exchange lower plate B (1409); the valve Ec (1424), the second layer cooling water tank (1402), the fifth layer cooling water tank (1405), and the valve Eb (1423) are connected, and are used for the circulation of cooling water output by the water pump B (19) and the valve Eba (1512), and are connected to the low-position spiral cooling pipe (302), the middle-position spiral cooling pipe (2018), and the high-position spiral cooling pipe (1016 ) are connected for circulation; the valve Ed (1425), the first-layer heat dissipation liquid tank (1401), the third-layer heat dissipation liquid tank (1403), the fourth-layer heat dissipation liquid tank (1404), the sixth-layer heat dissipation liquid tank (1406), and the valve Ea (1422) are connected for circulation of the heat dissipation liquid output by the water pump A (18), and are connected for circulation with the liquid cavity wall bottomless tube heat dissipation tower (15); between the first-layer heat dissipation liquid tank (1401) and the second-layer cooling water tank (1402) is a heat exchange lower plate A (1408); between the second-layer cooling water tank (1402) and the third-layer heat dissipation liquid tank (1403) is a heat exchange lower plate B (1409); between the third-layer heat dissipation liquid tank (1403) and the fourth-layer heat dissipation liquid tank (1404) is a heat exchange lower plate B (1409); between the third-layer heat dissipation liquid tank (1403) and the fourth-layer heat dissipation liquid tank (1406) is a heat exchange lower plate B (1409); between the third-layer heat dissipation liquid tank (1403) and the fourth-layer heat dissipation liquid tank (1404 ... The middle right partition (1410) is located between the troughs (1404); the heat exchange upper plate A (1411) is located between the fourth layer heat dissipation liquid trough (1404) and the fifth layer cooling water trough (1405); the heat exchange upper plate B (1412) is located between the fifth layer cooling water trough (1405) and the sixth layer heat dissipation liquid trough (1406); the heat exchange lower plate A (1408), the heat exchange lower plate B (1409), the heat exchange upper plate A (1411), and the heat exchange upper plate B (1412) are aluminum alloy corrugated plates; the middle right partition (1410), the middle left partition (1414), the heat exchange vertical plate A (1416), the heat exchange vertical plate B (1417), the heat exchange vertical plate C (1418), and the heat exchange vertical plate D (1419) are aluminum plates;The main heat dissipation bottom plate (1407), the main heat dissipation upper plate (1413), the main heat dissipation left plate (1415), and the main heat dissipation right plate (1420) are aluminum alloy concave-convex plates. ;

[0033] exist Figure 2 In the embodiment, the liquid cavity wall bottomless tube heat dissipation tower (15) comprises an outer wall vertical tube (1501), an inner wall vertical tube (1502), an annular heat dissipation liquid ring groove (1503), a heat dissipation airflow tube cavity (1504), an upper tower vent (1505), a lower tower vent (1506), a ventilation tower frame (1507), a heat dissipation liquid output port (1508), a heat dissipation liquid input port (1509), a heat dissipation airflow flow direction (1510), a temperature sensor tFa (1511), a valve Eba (1512), an annular bottom wall (1513), and an annular cover wall (1514).

[0034] The outer wall vertical cylinder (1501) and the inner wall vertical cylinder (1502) are cylindrical structures made of aluminum alloy material, with an inner diameter of 800-5000 mm and a wall thickness of 0.8-10 mm.

[0035] The inner wall vertical cylinder (1502) is a cylindrical structure made of aluminum alloy material, with an outer diameter of 50-4000 mm and a wall thickness of 0.5-8 mm.

[0036] The annular bottom wall (1513) and the annular cover wall (1514) are annular sheets made of aluminum alloy material, with an inner diameter of 50-4000 mm, an outer diameter of 800-5000 mm, and a wall thickness of 1-20 mm.

[0037] The outer circular edge of the lower end of the inner wall vertical tube (1502) at 5-80 mm upward is connected to the inner circular edge of the annular bottom wall (1513) and welded; the outer circular edge of the upper end of the inner wall vertical tube (1502) at 5-80 mm downward is connected to the inner circular edge of the annular cover wall (1514) and welded.

[0038] The inner circular edge of the lower end of the outer wall vertical tube (1501) at 5-80 mm upward is connected to the outer circular edge of the annular bottom wall (1513) and welded; the inner circular edge of the upper end of the outer wall vertical tube (1501) at 5-80 mm downward is connected to the outer circular edge of the annular cover wall (1514) and welded.

[0039] The annular bottom wall (1513) is welded to the ventilation tower (1507).

[0040] The ventilation tower (1507) is a support structure formed by welding stainless steel materials, and is provided with a flat base and a plurality of vertical supports, wherein the flat base is circular or polygonal, and the plurality of vertical supports are a plurality of pipes.

[0041] The outer wall vertical tube (1501), the inner wall vertical tube (1502), the annular bottom wall (1513), the annular cover wall (1514), and the ventilation tower frame (1507) form a body of a liquid cavity wall bottomless heat dissipation tower (15)); a connecting pipe (1700) is welded to the outer wall vertical tube (1501) at a position 10-100 mm downward from the annular cover wall (1514), and a heat dissipation liquid outlet (1508) is provided; a connecting pipe (1700) is welded to the outer wall vertical tube (1501) at a position 10-100 mm upward from the annular bottom wall (1513), and a heat dissipation liquid inlet (1509) is provided; and a temperature sensor tFa (1511) is provided at the upper half of the outer wall vertical tube (1501).

[0042] The structure of the liquid cavity wall bottomless tube heat dissipation tower (15) is characterized in that it is a vertical circular straight hollow tube structure, the hollow part is a ventilated heat dissipation airflow tube cavity (1504), the lower part is provided with a ventilation tower frame (1507), and the double-layer tube wall hollow structure is composed of an outer wall vertical tube (1501) and an inner wall vertical tube (1502), between the outer wall vertical tube (1501) and the inner wall vertical tube (1502) is an annular heat dissipation liquid ring groove (1503), and heat dissipation liquid is arranged in the annular heat dissipation liquid ring groove (1503); the lower part of the outer wall vertical tube (1501) is provided with a heat dissipation liquid input port (1509), and the lower part is provided with a heat dissipation liquid output port (1508); the heat dissipation principle is: the heat dissipation liquid is discharged from the heat dissipation liquid input port (1501) to the inner wall vertical tube (1502); the heat dissipation liquid is discharged from the outer wall vertical tube ... 09) input, passes through the annular heat dissipation liquid groove (1503) from bottom to top, and is output from the heat dissipation liquid outlet (1508). The air enters from the lower end of the heat dissipation airflow cylinder cavity (1504) and is discharged from the upper end, thereby generating a heat dissipation effect on the heat dissipation liquid in the inner wall vertical cylinder (1502) and the heat dissipation liquid groove (1503); at the same time, the inner wall vertical cylinder (1502) contacts the air in the inner circle to generate a heat dissipation effect on the heat dissipation liquid in the heat dissipation liquid groove (1503); and the heat dissipation effect and effect can be generated in an infinite cycle; no electric energy or other energy is required to drive the airflow, and the pressure difference at different heights is used to make the heat dissipation airflow cylinder cavity (1504) automatically generate airflow, which has the beneficial effect of saving energy and reducing environmental pollution.

[0043] exist Figure 3The cooling control system (1601) includes a single-chip microcomputer controller, a temperature sensor tAa, a temperature sensor tBa, a temperature sensor tCa, a temperature sensor tEa, a temperature sensor tFa, a water pump A, and a water pump B; the single-chip microcomputer controller includes a CPU, a power module, a network module, an A / D input module, a thyristor output module, a MAX232 module, a ROM memory, and a RAM memory; the network module of the single-chip microcomputer controller is connected to the control system; the A / D input module is connected to the temperature sensor tAa, the temperature sensor tBa, the temperature sensor tCa, the temperature sensor tEa, and the temperature sensor tFa; and the thyristor output module is connected to the water pump A and the water pump B.

[0044] The temperature control principle of the cooling control system (1601) is as follows: the temperature sensors tAa, tBa, tCa, tEa and tFa transmit temperature information to the A / D input module of the single-chip microcomputer controller; the CPU analyzes and processes the temperature values ​​of the temperature sensors according to the temperature information of the sensors converted by the A / D input module, calculates and processes the temperature values ​​of the temperature sensors, sets the control temperature values, sets the speed values ​​of the control water pumps A (18) and B (19), and sends the instructions for controlling the speeds of the water pumps A (18) and B (19) to the thyristor output module; the thyristor output module outputs the power control amount according to the instruction information of the CPU, thereby controlling the speeds of the water pumps A (18) and B (19). The temperatures of the low-level spiral cooling pipe (302), the middle-level spiral cooling pipe (2018) and the high-level spiral cooling pipe (1016) are thereby controlled, thereby achieving the temperature control of the low-level buffer powder gathering tank (3), the middle-level condensation filtering device (2) and the high-level condensation device (1).

[0045] The single chip controller controls the setting of the speed of the water pump B (19): the speed of the water pump B (19) is controlled according to the up and down fluctuations of the temperature values ​​of the temperature sensor tAa, the temperature sensor tBa and the temperature sensor tCa; the cumulative value of the temperature value of the temperature sensor tAa + the temperature value of the temperature sensor tBa + the temperature value of the temperature sensor tCa is set as the CSa value; setting 1: when the CSa value is 380-420, the speed of the water pump B (19) is set to be 700-740 r / min; setting 2: when the CSa value is lower than 400 -1; the speed of the water pump B (19) is set to decrease by 10-20 r / min; setting 3: when the CSa value is higher than 400 +1, the speed of the water pump B (19) is set to increase by 10-20 r / min.

[0046] The single chip controller controls the speed of the water pump A (18) by controlling the speed of the water pump A (18) according to the up and down fluctuations of the temperature values ​​of the temperature sensor tEa and the temperature sensor tFa; the accumulated value of the temperature value of the temperature sensor tEa + the temperature value of the temperature sensor tFa is set as the CSb value; setting 4: when the CSb value is 130-170, the speed of the water pump A (18) is controlled to be 700-740 r / min; setting 5: when the CSb value is lower than 150-1, the speed of the water pump A (18) is controlled to decrease by 15-25 r / min; setting 6: when the CSb value is higher than 150+1, the speed of the water pump A (18) is controlled to increase by 15-25 r / min.

[0047] The cooling method of the three-water-level spiral tube cooling system for producing nano-metal powder comprises: a cooling water circulation channel is formed by a water pump B (19), a valve Eba (1512), a connecting pipe (1700), a valve Ec (1424), a second-layer cooling water tank (1402), a fifth-layer cooling water tank (1405), a connecting pipe (1700), a valve Eb (1423), a low-level spiral cooling pipe (302), a connecting pipe (1700), a middle-level spiral cooling pipe (2018), a connecting pipe (1700), a high-level spiral cooling pipe (1016), and a connecting pipe (1700); The invention comprises a water pump A (18), a connecting pipe (1700), a valve Ed (1425), a first-layer heat dissipation liquid tank (1401), a third-layer heat dissipation liquid tank (1403), a fourth-layer heat dissipation liquid tank (1404), a sixth-layer heat dissipation liquid tank (1406), a valve Ea (1422), a heat dissipation liquid input port (1509), an annular heat dissipation liquid ring groove (1503), a heat dissipation liquid output port (1508), and a connecting pipe (1700). The cooling water circulation channel and the cooling liquid circulation channel are heat exchanged through the water tank sandwich heat exchanger (14), thereby reducing the temperature of the high-level condensing device, the middle-level condensing and filtering device, and the low-level buffer powder gathering tank; further, the temperature sensor tAa (1028), the temperature sensor tBa (2031), and the temperature sensor tCa (303) transmit the temperature information of the high-level condensing device, the middle-level condensing and filtering device, and the low-level buffer powder gathering tank to the A / D input module of the cooling control system (1601), and the cooling control system (1601) outputs the control power to control the speed of the water pump A (18) and the speed of the water pump B (19), thereby reducing the temperature of the high-level condensing device, the middle-level condensing and filtering device, and the low-level buffer powder gathering tank to a suitable temperature for the reaction between metal vapor and inert gas. Example

[0048] The invention is applied in a nano metal powder production system.

[0049] exist Figure 1 , Figure 2A nano metal powder production system is provided, the nano metal powder production system comprising the water tank sandwich heat exchanger (14) of the present invention, a liquid cavity wall bottomless tube heat dissipation tower (15), a water pump A (18), a water pump B (19), a low-position spiral cooling pipe (302), a middle-position spiral cooling pipe (2018), and a high-position spiral cooling pipe (1016); the nano metal powder production system also comprises a high-position condensing device (1), a middle-position condensing and filtering device (2), a low-position buffer powder gathering tank (3), a powder collecting and anti-caking device (4), a metal ore (5), a metal evaporation furnace (6), an inert gas tank (7), an air compressor (8), a filtering and returning device (9), an electromagnetic reversing valve (10), a vacuum pump (11), a vacuum packaging machine (12), and a finished nano metal powder production system. Metal powder (13), water tank sandwich heat exchanger (14), liquid cavity wall bottomless tube heat dissipation tower (15), control system (16), nano metal powder (17), water pump A (18), water pump B (19), high-position spiral cooling pipe (1016), middle-position spiral cooling pipe (2018), low-position spiral cooling pipe (302), valve Fa (71), pressure gauge Ya (72), valve Fb (73), valve Fc (74), pressure gauge Yb (109), valve FAa (1010), valve FAe (1027), (81) pressure gauge Yc, valve Fe (82), one-way valve Ha (83), one-way valve Hb (84), pressure gauge Yd (2025), pressure gauge Ye (31), valve Ff (32), solenoid valve DFc (33), valve Ft (34), vacuum gauge ZYa (4015), vacuum gauge ZYb (4025), valve Eba (1512); the technical function of the nano metal powder production system using the present invention is: the metal vapor evaporated by the metal evaporation furnace (6) is condensed at three different temperatures, and the metal powder condensed at three different temperatures is collected and packaged into finished nano metal powder, thereby improving the speed of converting metal vapor into nano metal powder and the degree of formation of nano particles, thereby improving the production quality, quantity and production efficiency of nano metal powder; the first condensation is: the high-level condensation device (1) condenses the metal vapor generated by the metal evaporation furnace (6), and the condensed nano metal The powder is transported to the powder collecting and anti-agglomeration device (4), and the uncondensed metal vapor is transported to the middle-level condensation and filtering device (2); the second condensation is as follows: the middle-level condensation and filtering device (2) condenses the metal vapor transported by the high-level condensation device (1) and the inert gas pulsed at intervals by the electromagnetic reversing valve (10) into nano-metal powder, which is transported to the powder collecting and anti-agglomeration device (4); the uncondensed metal vapor is transported to the low-level buffer powder gathering tank (3); the inert gas after the condensation reaction is transported to the filtering and recycling device (9) at intervals through the electromagnetic reversing valve (10); the filtering and recycling device (9) filters the reacted inert gas, performs gas-solid separation, outputs the nano-metal powder to the powder collecting and anti-agglomeration device (4), and outputs the filtered inert gas to the inert gas tank (7);The third condensation is as follows: the low-position buffer powder gathering tank (3) cools the metal vapor delivered by the middle-position condensation and filtration device (2) into nano-metal powder and delivers it to the powder collection and anti-agglomeration device (4), and delivers the uncondensed metal vapor to the filtering and recycling device (9); the powder collection and anti-agglomeration device (4) performs anti-agglomeration treatment on the nano-metal powder delivered by the high-position condensation device (1), the middle-position condensation and filtration device (2), the low-position buffer powder gathering tank (3), and the filtering and recycling device (9), and then delivers it to the vacuum packaging machine (12) for vacuum packaging to obtain the finished nano-metal powder (13).

[0050] The bottom end height of the high-position condensing device (1) is higher than the center height of the middle-position condensing and filtering device (2), the top end height of the low-position buffer powder gathering tank (3) is lower than the center height of the middle-position condensing and filtering device (2), and the top end height of the powder collecting and anti-caking device (4) is lower than the bottom end heights of the high-position condensing device (1), the middle-position condensing and filtering device (2), and the low-position buffer powder gathering tank (3); the spiral tube of the present invention is wound in series on the outer walls of the high-position condensing device (1), the middle-position condensing and filtering device (2), and the low-position buffer powder gathering tank (3), and when the water of the spiral tube circulates, a gradual cooling effect can be generated, so that the temperature of the high-position condensing device (1), the middle-position condensing and filtering device (2), and the low-position buffer powder gathering tank (3) is controlled at a temperature suitable for condensing metal vapor into nano-metal powder; the control system controls the cooling control system (1601) of the present invention to control the speed of the water pump A (18) and the water pump B (19), thereby controlling the temperature of the high-position condensing device (1), the middle-position condensing and filtering device (2), and the low-position buffer powder gathering tank (3). When the intermediate condensation and filtration device (2) is in operation, the high-pressure pulse input of the inert gas from the inert gas tank is used to impact and condense with the metal vapor through the air compressor and the electromagnetic reversing valve (10), and the inert gas condensed with the metal powder is then transported to the filtering and recycling device (9) for filtration through the electromagnetic reversing valve (10) at intervals. After filtering the inert gas, the filtering and recycling device (9) returns the nano-metal powder to the powder collecting and anti-agglomeration device (4), and at the same time, returns the inert gas to the inert gas tank. The present invention performs cooling work on the high-position condensation device (1), the intermediate condensation and filtration device (2), and the low-position buffer powder gathering tank (3), so that the temperature of the high-position condensation device is controlled at 200-160 degrees, the temperature of the intermediate condensation and filtration device is controlled at 160-120 degrees, and the temperature of the low-position buffer powder gathering tank is controlled at 120-80 degrees.

[0051] Due to the effect of the present invention in the nano metal powder production system: it can form a three-stage temperature environment from high to low for the high-position condensation device (1), the middle-position condensation and filtration device (2), and the low-position buffer powder gathering tank (3); thereby, the high-position condensation device (1), the middle-position condensation and filtration device (2), and the low-position buffer powder gathering tank (3) can provide a suitable three-stage temperature environment for the condensation of metal vapor and inert gas in multiple dimensions, thereby making the condensation efficiency of the nano metal powder high, the forming degree good, the collection efficiency high, the cost reduced, and the production efficiency high; thereby, the product quality and quantity of the nano metal powder can be improved, thereby promoting the application and promotion of the nano metal powder, so that the superior performance of the nano metal material can be more and better promoted to various industries for application, thereby promoting technological progress in various industries.

Claims

1. A three-water-level spiral tube cooling system for producing nano-metal powder, comprising a water pump A (18), a water pump B (19), a cooling control system (1601), a temperature sensor tCa (303), a temperature sensor tBa (2031), a temperature sensor tAa (1028), a temperature sensor tEa (1421), a temperature sensor tFa (1511), and a connecting pipe (1700); characterized in that: It also includes a water tank stacked heat exchanger (14), a liquid cavity wall bottomless tube heat dissipation tower (15), a low-position spiral cooling pipe (302), a middle-position spiral cooling pipe (2018), and a high-position spiral cooling pipe (1016).

2. A three-water-level spiral tube cooling system for producing nano-metal powder according to claim 1, characterized in that: Pure water or ammonia water containing 1-10% is used as the heat dissipation liquid; the heat dissipation liquid is output from a water pump A (18) and input into a water tank sandwich heat exchanger (14) through a valve Ed (1425); the heat dissipation liquid is output from a valve Ea (1422) and supplied to a liquid cavity wall bottomless tube heat dissipation tower (15) after heat exchange through the water tank sandwich heat exchanger (14); the heat dissipation liquid flows from a heat dissipation liquid input port (1509) of the liquid cavity wall bottomless tube heat dissipation tower (15) to fill an annular heat dissipation liquid ring groove (1503), and flows out from a heat dissipation liquid output port (1509) of the heat dissipation liquid input port (1509) of the heat dissipation liquid output ... 1508) is discharged and then transported to water pump A (18) through connecting pipe (1700) for circulation; the cooling control system (1601) controls the speed of water pump A (18) according to the temperature information collected by temperature sensor tEa (1421) and temperature sensor tFa (1511), thereby controlling the temperature of the water tank sandwich heat exchanger (14); thereby controlling the temperature of the low-position spiral cooling pipe (302), the middle-position spiral cooling pipe (2018), and the high-position spiral cooling pipe (1016).

3. The three-water-level spiral tube cooling system for producing nano-metal powder according to claim 1, characterized in that: Three different cooling water points are provided, and the hot water at the three water points is heat-exchanged with the heat dissipation liquid of the bottomless tube heat dissipation tower (15) on the liquid cavity wall through a water tank stacked heat exchanger (14), thereby forming a step cooling effect for the low-position spiral cooling tube (302), the middle-position spiral cooling tube (2018), and the high-position spiral cooling tube (1016) at the three different water points, that is, the cooling temperature of the low-position spiral cooling tube (302) is lower than the temperature of the middle-position spiral cooling tube (2018), and the temperature of the high-position spiral cooling tube (1016) is higher than the temperature of the middle-position spiral cooling tube (2018), thereby forming three different temperature states; the three different water points are respectively provided with three spiral cooling tubes, namely, the low-position spiral cooling tube (302) and the high-position spiral cooling tube (1016) are respectively provided with three spiral cooling tubes. The invention relates to a spiral cooling tube (302), a middle spiral cooling tube (2018), and a high spiral cooling tube (1016), wherein the high water level of the low spiral cooling tube (302) is lower than the low water level of the middle spiral cooling tube (2018), the high water level of the middle spiral cooling tube (2018) is lower than the low water level of the high spiral cooling tube (1016), and the high water level of the high spiral cooling tube (1016) is the highest water level; and the water flow direction is spiral flow from the low water level end of the low spiral cooling tube (302) to the high water level end, then spiral flow from the low water level end of the middle spiral cooling tube (2018) to the high water level end, and then spiral flow from the low water level end of the high spiral cooling tube (1016) to the high water level end.

4. The three-water-level spiral tube cooling system for producing nano-metal powder according to claim 1, characterized in that: The water tank stacked heat exchanger (14) comprises a first layer of heat dissipation liquid tank (1401), a second layer of cooling water tank (1402), a third layer of heat dissipation liquid tank (1403), a fourth layer of heat dissipation liquid tank (1404), a fifth layer of cooling water tank (1405), a sixth layer of heat dissipation liquid tank (1406), a main heat dissipation bottom plate (1407), a heat exchange lower plate A (1408), a heat exchange lower plate B (1409), a middle right partition plate (1410), a heat exchange Upper plate A (1411), heat exchange upper plate B (1412), main heat dissipation upper plate (1413), middle left partition (1414), main heat dissipation left plate (1415), heat exchange vertical plate A (1416), heat exchange vertical plate B (1417), heat exchange vertical plate C (1418), heat exchange vertical plate D (1419), main heat dissipation right plate (1420), temperature sensor tEa (1421), valve Ea (1422), valve E b (1423), valve Ec (1424), valve Ed (1425), heat dissipation liquid flow direction (1426), cooling water flow direction (1427); the water tank sandwich heat exchanger (14) is provided with four layers of heat dissipation tanks and two layers of cooling tanks, the heat dissipation tanks sandwich the cooling tanks, the second layer of cooling water tanks (1402) are sandwiched between the first layer of heat dissipation liquid tanks (1401) and the third layer of heat dissipation liquid tanks (1403), the fifth layer of cooling water tanks (1405) are sandwiched between the fourth layer of heat dissipation liquid tanks (1404) and the sixth layer of heat dissipation liquid tanks (1406); the cooling water of the second layer of cooling water tanks (1402) and the fifth layer of cooling water tanks (1405) performs heat exchange with the heat dissipation liquid of the first layer of heat dissipation liquid tanks (1401) and the third layer of heat dissipation liquid tanks (1403), the fourth layer of heat dissipation liquid tanks (1404) and the sixth layer of heat dissipation liquid tanks (1406).

5. A three-water-level spiral tube cooling system for producing nano-metal powder according to claim 4, characterized in that: The heat dissipation liquid in the first layer of heat dissipation liquid groove (1401), the third layer of heat dissipation liquid groove (1403), the fourth layer of heat dissipation liquid groove (1404) and the sixth layer of heat dissipation liquid groove (1406) sandwiches the cooling water in the second layer of cooling water groove (1402) and the fifth layer of cooling water groove (1405).

6. A three-water-level spiral tube cooling system for producing nano-metal powder according to claim 4 or 5, characterized in that: The valve Ec (1424), the second layer cooling water tank (1402), the fifth layer cooling water tank (1405), and the valve Eb (1423) are connected to allow the cooling water output by the water pump B (19) and the valve Eba (1512) to circulate, and are connected to the low-position spiral cooling pipe (302), the middle-position spiral cooling pipe (2018), and the high-position spiral cooling pipe (1016) for circulation; the valve Ed (1425), the first layer heat dissipation liquid tank (1401), the third layer heat dissipation liquid tank (1403), the fourth layer heat dissipation liquid tank (1404), the sixth layer heat dissipation liquid tank (1406), and the valve Ea (1422) are connected to allow the cooling liquid output by the water pump A (18) to circulate, and are connected to the liquid cavity wall bottomless tube heat dissipation tower (15) for circulation.

7. The three-water-level spiral tube cooling system for producing nano-metal powder according to claim 1, characterized in that: The liquid cavity wall bottomless heat dissipation tower (15) comprises an outer wall vertical tube (1501), an inner wall vertical tube (1502), an annular heat dissipation liquid ring groove (1503), a heat dissipation airflow cylinder cavity (1504), an upper tower vent (1505), a lower tower vent (1506), a ventilation tower frame (1507), a heat dissipation liquid output port (1508), a heat dissipation liquid input port (1509), a heat dissipation airflow flow direction (1510), a temperature sensor tFa (1511), a valve Eba (1512), an annular bottom wall (1513), and an annular cover wall (1514).

8. A three-water-level spiral tube cooling system for producing nano-metal powder according to claim 7, characterized in that: The outer wall vertical tube (1501), the inner wall vertical tube (1502), the annular bottom wall (1513), the annular cover wall (1514), and the ventilation tower frame (1507) form a body of a liquid cavity wall bottomless heat dissipation tower (15)); a connecting pipe (1700) is welded to the outer wall vertical tube (1501) at a position 10-100 mm downward from the annular cover wall (1514), and a heat dissipation liquid outlet (1508) is provided; a connecting pipe (1700) is welded to the outer wall vertical tube (1501) at a position 10-100 mm upward from the annular bottom wall (1513), and a heat dissipation liquid inlet (1509) is provided; and a temperature sensor tFa (1511) is provided at the upper half of the outer wall vertical tube (1501).

9. The three-water-level spiral tube cooling system for producing nano-metal powder according to claim 7, characterized in that: The structure of the liquid cavity wall bottomless tube heat dissipation tower (15) is a vertical circular straight hollow tube structure, the hollow part is a ventilated heat dissipation airflow tube cavity (1504), the lower part is provided with a ventilation tower frame (1507), and the double-layer tube wall hollow structure is composed of an outer wall vertical tube (1501) and an inner wall vertical tube (1502), between the outer wall vertical tube (1501) and the inner wall vertical tube (1502) is an annular heat dissipation liquid ring groove (1503), and heat dissipation liquid is arranged in the annular heat dissipation liquid ring groove (1503); the lower part of the outer wall vertical tube (1501) is provided with a heat dissipation liquid input port (1509), and the lower part is provided with a heat dissipation liquid output port (1508); the heat dissipation principle is: the heat dissipation liquid is discharged from the heat dissipation tube to the heat dissipation tube; The air is inputted from the liquid input port (1509), passes through the annular heat dissipation liquid groove (1503) from bottom to top, and is outputted from the heat dissipation liquid output port (1508). The air enters from the lower end of the heat dissipation airflow cylinder cavity (1504) and is discharged from the upper end, thereby generating a heat dissipation effect on the heat dissipation liquid in the inner wall vertical cylinder (1502) and the heat dissipation liquid groove (1503). At the same time, the inner wall vertical cylinder (1502) contacts the air in the inner circle to generate a heat dissipation effect on the heat dissipation liquid in the heat dissipation liquid groove (1503). The heat dissipation effect and effect can be generated in an infinite cycle. No electric energy or other energy sources are required to drive the airflow, and the air pressure difference at different heights is used to automatically generate airflow in the heat dissipation airflow cylinder cavity (1504).

10. The three-water-level spiral tube cooling system for producing nano-metal powder according to claim 1, characterized in that: The cooling control system (1601) includes a single-chip microcomputer controller, a temperature sensor tAa, a temperature sensor tBa, a temperature sensor tCa, a temperature sensor tEa, a temperature sensor tFa, a water pump A, and a water pump B; the single-chip microcomputer controller includes a CPU, a power module, a network module, an A / D input module, a thyristor output module, a MAX232 module, a ROM memory, and a RAM memory; the network module of the single-chip microcomputer controller is connected to the control system; the A / D input module is connected to the temperature sensor tAa, the temperature sensor tBa, the temperature sensor tCa, the temperature sensor tEa, and the temperature sensor tFa; and the thyristor output module is connected to the water pump A and the water pump B.

11. A three-water-level spiral tube cooling system for producing nano-metal powder according to claim 10, characterized in that: The temperature control principle of the cooling control system (1601) is as follows: the temperature sensors tAa, tBa, tCa, tEa and tFa transmit temperature information to the A / D input module of the single-chip microcomputer controller; the CPU uses a program to analyze and process the temperature values ​​of the temperature sensors according to the temperature information of the sensors converted by the A / D input module; calculates and processes the temperature values ​​of the temperature sensors to set the control temperature values; sets the speed values ​​of the control water pumps A (18) and B (19); and sends instructions for controlling the speeds of the water pumps A (18) and B (19) to the thyristor output module; the thyristor output module outputs a power control amount according to the instruction information of the CPU, thereby controlling the speeds of the water pumps A (18) and B (19); and thereby controlling the temperatures of the low-position spiral cooling pipe (302), the middle-position spiral cooling pipe (2018) and the high-position spiral cooling pipe (1016).

12. A three-water-level spiral tube cooling system for producing nano-metal powder according to claim 10 or 11, characterized in that: The microcontroller controller controls the speed of water pump B (19): the speed of water pump B (19) is controlled according to the up and down fluctuations of the temperature values ​​of temperature sensor tAa, temperature sensor tBa and temperature sensor tCa; the cumulative value of the temperature value of temperature sensor tAa + the temperature value of temperature sensor tBa + the temperature value of temperature sensor tCa is set as CSa value; setting 1: when the CSa value is 380-420, the speed of water pump B (19) is set to 700-740r / min; setting 2: when the CSa value is lower than 400 (-1); the speed of water pump B (19) is set to decrease by 10-20r / min; setting 3: when the CSa value is higher than 400 (+1), the speed of water pump B (19) is set to increase by 10-20r / min.

13. A three-water-level spiral tube cooling system for producing nano-metal powder according to claim 10 or 11, characterized in that: The microcontroller controller controls the speed of water pump A (18) as follows: the speed of water pump A (18) is controlled according to the up and down fluctuations of the temperature values ​​of temperature sensor tEa and temperature sensor tFa; the accumulated value of the temperature value of temperature sensor tEa + the temperature value of temperature sensor tFa is set as CSb value; Setting 4: when the CSb value is 130-170, the speed of water pump A (18) is controlled to be 700-740r / min; Setting 5: when the CSb value is lower than 150-1, the speed of water pump A (18) is controlled to decrease by 15-25r / min; Setting 6: when the CSb value is higher than 150+1, the speed of water pump A (18) is controlled to increase by 15-25r / min.

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