Automatic proportioning method of salt spray test solution

Abstract

The present application belongs to the technical field of test experiment, and particularly relates to a kind of automatic proportioning method of salt spray test solution. The test salt solution is automatically proportioned into a salt solution of a specified concentration from a saturated salt solution at a certain temperature in a saturated salt solution bucket and a quantitative pure water, and is stored in a salt water bucket for spraying. A built-in air saturation bucket automatically passes the impurity-removed pure compressed air into the pure water at a certain temperature, so that the high-pressure air reaches the humidity saturation state at a specified temperature. Finally, the humidity-saturated high-pressure air is mixed with the salt solution in the salt water bucket and is atomized and sprayed into the test box. The flow meter is used to automatically control the flow at each place, and each solution bucket can automatically replenish and control the liquid level.

Description

Technical Field

[0001] This invention belongs to the field of testing and experimental technology, and specifically relates to an automatic method for preparing salt spray test solutions. Background Technology

[0002] Corrosion causes enormous direct losses to metallic materials.

[0003] Corrosion is the damage or deterioration of materials or their properties caused by environmental factors. Most corrosion occurs in the atmosphere, which contains corrosive components and factors such as oxygen, humidity, temperature changes, and pollutants. Salt spray corrosion is a common and highly destructive form of atmospheric corrosion. Salt spray refers to chloride-laden air, with sodium chloride as its main corrosive component. Salt spray corrosion of metal surfaces is caused by chloride ions penetrating the oxide and protective layers of the metal surface and reacting electrochemically with the internal metal. Simultaneously, chloride ions possess a certain hydration energy, making them easily adsorbed in the pores and cracks of the metal surface, displacing oxygen in the chloride layer, converting insoluble oxides into soluble chlorides, and transforming passivated surfaces into active surfaces, resulting in extremely adverse effects on the product.

[0004] Salt spray testing is an environmental test that uses artificially simulated salt spray conditions created by salt spray testing equipment to assess the corrosion resistance of products or metallic materials. Salt spray testing utilizes a salt spray test chamber to artificially create an environment that simulates the salt spray conditions under which a product is used, in order to test the corrosion resistance of products, especially metallic materials. The environment created by a salt spray test chamber has a sodium chloride concentration several times higher than that of natural salt spray, thus enhancing the corrosive effect. Compared to testing in a natural environment, this method significantly reduces testing time and costs.

[0005] Currently, many military and civilian products require salt spray testing for environmental testing. Early salt spray tests were mainly for small components, but with the improvement of testing capabilities, the samples tested have gradually expanded from components to complete machines, and salt spray chambers have grown from less than 1 cubic meter to tens or even hundreds of cubic meters. Currently, the salt solution used in salt spray tests is prepared manually. Smaller salt spray chambers require less salt solution, and a single preparation can last for a relatively long time. However, with the introduction of larger salt spray chambers to the market, more salt solution is needed for a single test. Continuing to use manual salt solution preparation is wasteful of manpower and increases testing costs. A control system that can automatically prepare the required salt solution concentration during testing without human intervention would significantly reduce testing costs and increase the reliability of test data. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] The technical problem to be solved by this invention is: how to provide an automatic method for preparing salt spray test solutions.

[0008] (II) Technical Solution

[0009] To solve the above-mentioned technical problems, the present invention provides an automatic salt spray test solution preparation method, the method being as follows: the test salt solution is automatically prepared by mixing a saturated salt solution at a certain temperature in a saturated salt water tank with a quantitative amount of pure water to form a salt solution of a specified concentration, and stored in a salt water tank for spraying.

[0010] The system uses a built-in air saturation tank to automatically introduce purified compressed air, after removing impurities, into pure water at a certain temperature, so that the high-pressure air reaches a humidity saturation state at a specified temperature; finally, the humidity-saturated high-pressure air is mixed with the salt solution in the brine tank and atomized and sprayed into the test chamber.

[0011] The flow meter is used to automatically control the flow rate at each point, and each solution tank can be automatically replenished and the liquid level controlled.

[0012] The implementation of the method involves an automatic proportioning system, which includes: wastewater inlet 1, water inlet 2, manual valve 3, pure water machine 4, replaceable solute tank 5, saturated solution tank 6, PVC manual valve 7, pure water tank 8, working solution tank 9, first PVC filter 10, peristaltic pump 11, drain outlet 12, air saturation tank 13, atomizer 14, air inlet 15, first solenoid valve 16, second solenoid valve 17, third solenoid valve 18, fourth solenoid valve 19, fifth solenoid valve 20, sixth solenoid valve 21, seventh solenoid valve 22, eighth solenoid valve 23, second PVC filter 24, and air purification device 25.

[0013] The wastewater inlet 1 is connected to the pure water machine 4; the water inlet 2, the hand valve 3, the first PVC filter 10, and the inlet of the pure water machine 4 are connected in sequence.

[0014] The outlet of the pure water machine 4 is connected to the inlet of the replaceable solute tank 5, the inlet of the pure water tank 8, and the inlet of the air saturation tank 13, respectively; a second solenoid valve 17 and a PVC hand valve 7 are installed between the pure water machine 4 and the inlet of the replaceable solute tank 5.

[0015] The outlet of the replaceable solute tank 5 is connected to the inlet of the saturated solution tank 6.

[0016] The outlet of the saturated solution tank 6 and the outlet of the pure water tank 8 converge and are then connected to the inlet of the solution tank 9.

[0017] The outlet of the solution tank 9 is connected to the atomizer 14 via the second PVC filter 24 and the peristaltic pump 11.

[0018] The air inlet 15 is connected to the air purification device 25, and the air purification device 25 is connected to the air saturation tank 13 via the seventh solenoid valve 22.

[0019] The wastewater generated during the experiment enters the pure water machine 4 from the wastewater inlet 1 or the tap water enters from the water inlet 2 for filtration and cleaning.

[0020] After filtration, the purified water enters the replaceable solute tank 5, the pure water tank 8, and the air saturation tank 13. The solution enters the saturated solution tank 6 from the replaceable solute tank 5. The solutions in the saturated solution tank 6 and the pure water tank 8 are mixed and then enter the working solution tank 9. The concentration of the salt solution in the working solution tank 9 is adjusted according to the needs, and the speed at which the solutions in the saturated solution tank 6 and the pure water tank 8 enter the working solution tank 9 is adjusted.

[0021] The solution flowing out of the solution tank 9 is purified by the PVC filter 24 and then enters the atomizer 14 through the peristaltic pump 11.

[0022] Pure compressed air, after impurities have been removed, enters the air purification device 25 through the air inlet 15 and is purified. Then it enters the pure water at a certain temperature in the air saturation tank 13, so that the high-pressure air reaches the humidity saturation state at the specified temperature. The preheated and humidified high-pressure air enters the atomizer to atomize and spray out the salt solution.

[0023] A fifth solenoid valve 20 is installed between the saturated solution tank 6 and the use solution tank 9, and a first solenoid valve 16 is installed between the pure water tank 8 and the use solution tank 9. When the liquid level in the use solution tank 9 is low, the internal float level controller transmits a signal to the first solenoid valve 16 and the fifth solenoid valve 20. The first solenoid valve 16 and the fifth solenoid valve 20 open, and the solutions in the saturated solution tank 6 and the pure water tank 8 flow into the use solution tank 9.

[0024] When the liquid level in solution tank 9 is high, the internal float level controller sends a signal to the first solenoid valve 16 and the fifth solenoid valve 20, and the first solenoid valve 16 and the fifth solenoid valve 20 close.

[0025] By adjusting and controlling the flow rate of the solution in the first solenoid valve 16 and the fifth solenoid valve 20, the percentage content of salt in the salt solution in the solution tank 9 can be controlled.

[0026] Among them, a second solenoid valve 17 is installed between the pure water machine 4 and the saturated solution tank 6, and a sixth solenoid valve 21 is installed between the pure water machine 4 and the pure water tank 8; a third solenoid valve 18 is installed between the saturated solution tank 6 and the drain outlet 12, and an eighth solenoid valve 23 is installed between the pure water tank 8 and the drain outlet 12.

[0027] When the equipment is operating normally during the spraying phase, the second solenoid valve 17 and the sixth solenoid valve 21 will open at regular intervals, allowing the solution to enter the saturated solution tank 6 and the pure water tank 8, respectively. When the liquid levels in the saturated solution tank 6 and the pure water tank 8 are high, the excess solution will flow into the square trough on the outside of the tank wall. The square trough contains a float level controller. When the solution in the square trough reaches a certain height, the internal float level controller sends a signal to the second solenoid valve 17, the sixth solenoid valve 21, the third solenoid valve 18, and the eighth solenoid valve 23. The second solenoid valve 17 and the sixth solenoid valve 21 will close, while the third solenoid valve 18 and the eighth solenoid valve 23 will open, draining the solution from the square trough.

[0028] A water guide pipe is installed at the top of the square trough outside the walls of the saturated solution tank 6 and the pure water tank 8. When there is too much solution in the square trough, it is discharged directly through the water guide pipe to prevent the solution in the square trough from overflowing when the signal is delayed or the equipment fails.

[0029] A fourth solenoid valve 19 is provided between the water purifier 4 and the drain outlet 12;

[0030] The air saturation tank 13 has heating and heat preservation functions. There is a temperature sensor inside the tank. When the liquid level in the air saturation tank 13 is high, the excess solution will flow into the square groove on the outside of the tank wall. The square groove contains a float level controller. When the liquid level in the square groove reaches a certain height, the internal float level controller sends a signal to the fourth solenoid valve 19, and the fourth solenoid valve 19 closes. The air saturation tank and the external square groove are connected. When the solution level in the air saturation tank 13 drops, the solution level in the external square groove will also drop accordingly. When the liquid level is low, the float level controller sends a signal to the fourth solenoid valve 19, and the fourth solenoid valve 19 opens.

[0031] The solutions in the replaceable solute tank 5, pure water tank 8, working solution tank 9, and air saturation tank 13 can be discharged through the drain outlet 12 by opening the corresponding PVC manual valve; each solution tank is equipped with a PVC manual valve, which can be manually controlled for easy maintenance.

[0032] The compressed air, after being cleaned of oil and dirt, should be preheated and humidified. The purpose of preheating is to compensate for the cooling effect when the compressed air expands to atmospheric pressure. The purpose of humidification is to prevent the dry air from carrying away water from the salt solution and reducing the concentration of the salt solution.

[0033] Sufficient salt should be added to the replaceable solute tank 5, and the solute crystals should be at least 500mm in size. The pure water entering the replaceable solute tank 5 should seep out from the bottom of the solute crystals. This ensures that the solute is fully dissolved in the water, so that the solution entering the saturated solution tank 6 reaches a saturated state.

[0034] Each solenoid valve is an electromagnetically controlled industrial device, a fundamental component of automated fluid control systems, used to adjust the direction, flow rate, speed, and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, while ensuring both precision and flexibility.

[0035] The float level controller is as follows: one or more reed switches are installed in a sealed non-magnetic tube, and then the tube is passed through one or more hollow floats with annular magnets inside. The rise or fall of the liquid will cause the floats to move up and down together, thereby causing the reed switches in the non-magnetic tube to engage or disengage, thus outputting a switch signal.

[0036] The water purifier is an external reverse osmosis water purifier that automatically purifies and softens tap water and fills the pure water tank. The pure water produced has a pH value of 6.5 to 7.2, a resistivity of (1500 to 2500) Ω·m, and a flow rate that meets the requirement of 15L / h.

[0037] (III) Beneficial Effects

[0038] Compared with the prior art, the present invention automatically mixes the saturated salt solution at a certain temperature in a saturated brine tank with a quantitative amount of pure water to form a salt solution of a specified concentration, and stores it in a brine tank for spraying.

[0039] The system uses a built-in air saturation tank to automatically introduce purified compressed air, after removing impurities, into pure water at a certain temperature, so that the high-pressure air reaches a humidity saturation state at a specified temperature; finally, the humidity-saturated high-pressure air is mixed with the salt solution in the brine tank and atomized and sprayed into the test chamber.

[0040] The flow meter is used to automatically control the flow rate at each point, and each solution tank can be automatically replenished and the liquid level controlled. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of an automatic proportioning system.

[0042] In the diagram: 1. Wastewater inlet; 2. Water inlet; 3. Manual valve; 4. Pure water machine; 5. Replaceable solute tank; 6. Saturated solution tank; 7. PVC manual valve; 8. Pure water tank; 9. Use solution tank; 10. First PVC filter; 11. Peristaltic pump; 12. Drain outlet; 13. Air saturation tank; 14. Atomizer; 15. Air inlet; 16. First solenoid valve; 17. Second solenoid valve; 18. Third solenoid valve; 19. Fourth solenoid valve; 20. Fifth solenoid valve; 21. Sixth solenoid valve; 22. Seventh solenoid valve; 23. Eighth solenoid valve; 24. Second PVC filter; 25. Air purification device. Detailed Implementation

[0043] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0044] To solve the above-mentioned technical problems, the present invention provides an automatic salt spray test solution preparation method, the method being as follows: the test salt solution is automatically prepared by mixing a saturated salt solution at a certain temperature in a saturated salt water tank with a quantitative amount of pure water to form a salt solution of a specified concentration (mass ratio), and stored in a salt water tank for spraying;

[0045] The system uses a built-in air saturation tank to automatically introduce purified compressed air, after removing impurities, into pure water at a certain temperature, so that the high-pressure air reaches a humidity saturation state at a specified temperature; finally, the humidity-saturated high-pressure air is mixed with the salt solution in the brine tank and atomized and sprayed into the test chamber.

[0046] The flow meter is used to automatically control the flow rate at each point, and each solution tank can be automatically replenished and the liquid level controlled.

[0047] The implementation of the method involves an automatic proportioning system, such as... Figure 1 As shown, the automatic mixing system includes: wastewater inlet 1, water inlet 2, manual valve 3, pure water machine 4, replaceable solute tank 5, saturated solution tank 6, PVC manual valve 7, pure water tank 8, working solution tank 9, first PVC filter 10, peristaltic pump 11, drain outlet 12, air saturation tank 13, atomizer 14, air inlet 15, first solenoid valve 16, second solenoid valve 17, third solenoid valve 18, fourth solenoid valve 19, fifth solenoid valve 20, sixth solenoid valve 21, seventh solenoid valve 22, eighth solenoid valve 23, second PVC filter 24, and air purification device 25.

[0048] The wastewater inlet 1 is connected to the pure water machine 4; the water inlet 2, the hand valve 3, the first PVC filter 10, and the inlet of the pure water machine 4 are connected in sequence.

[0049] The outlet of the pure water machine 4 is connected to the inlet of the replaceable solute tank 5, the inlet of the pure water tank 8, and the inlet of the air saturation tank 13, respectively; a second solenoid valve 17 and a PVC hand valve 7 are installed between the pure water machine 4 and the inlet of the replaceable solute tank 5.

[0050] The outlet of the replaceable solute tank 5 is connected to the inlet of the saturated solution tank 6.

[0051] The outlet of the saturated solution tank 6 and the outlet of the pure water tank 8 converge and are then connected to the inlet of the solution tank 9.

[0052] The outlet of the solution tank 9 is connected to the atomizer 14 via the second PVC filter 24 and the peristaltic pump 11.

[0053] The air inlet 15 is connected to the air purification device 25, and the air purification device 25 is connected to the air saturation tank 13 via the seventh solenoid valve 22.

[0054] The wastewater generated during the experiment enters the pure water machine 4 from the wastewater inlet 1 or the tap water enters from the water inlet 2 for filtration and cleaning.

[0055] After filtration, the purified water enters the replaceable solute tank 5, the pure water tank 8, and the air saturation tank 13. The solution enters the saturated solution tank 6 from the replaceable solute tank 5. The solutions in the saturated solution tank 6 and the pure water tank 8 are mixed and then enter the working solution tank 9. The concentration of the salt solution in the working solution tank 9 is adjusted according to the needs, and the speed at which the solutions in the saturated solution tank 6 and the pure water tank 8 enter the working solution tank 9 is adjusted.

[0056] The solution flowing out of the solution tank 9 is purified by passing through the PVC filter 24 (to remove impurities from the medium and protect the valves and equipment for normal use), and then enters the atomizer 14 through the peristaltic pump 11.

[0057] Pure compressed air, after impurities have been removed, enters the air purification device 25 through the air inlet 15 and is purified. Then it enters the pure water at a certain temperature in the air saturation tank 13, so that the high-pressure air reaches the humidity saturation state at the specified temperature. The preheated and humidified high-pressure air enters the atomizer to atomize and spray out the salt solution.

[0058] A fifth solenoid valve 20 is installed between the saturated solution tank 6 and the use solution tank 9, and a first solenoid valve 16 is installed between the pure water tank 8 and the use solution tank 9. When the liquid level in the use solution tank 9 is low, the internal float level controller transmits a signal to the first solenoid valve 16 and the fifth solenoid valve 20. The first solenoid valve 16 and the fifth solenoid valve 20 open, and the solutions in the saturated solution tank 6 and the pure water tank 8 flow into the use solution tank 9.

[0059] When the liquid level in solution tank 9 is high, the internal float level controller sends a signal to the first solenoid valve 16 and the fifth solenoid valve 20, and the first solenoid valve 16 and the fifth solenoid valve 20 close.

[0060] By adjusting and controlling the flow rate of the solution in the first solenoid valve 16 and the fifth solenoid valve 20, the percentage content of salt in the salt solution in the solution tank 9 can be controlled.

[0061] Among them, a second solenoid valve 17 is installed between the pure water machine 4 and the saturated solution tank 6, and a sixth solenoid valve 21 is installed between the pure water machine 4 and the pure water tank 8; a third solenoid valve 18 is installed between the saturated solution tank 6 and the drain outlet 12, and an eighth solenoid valve 23 is installed between the pure water tank 8 and the drain outlet 12.

[0062] When the equipment is operating normally during the spraying phase, every 20 minutes, the second solenoid valve 17 and the sixth solenoid valve 21 will open, allowing the solution to enter the saturated solution tank 6 and the pure water tank 8, respectively. When the liquid levels in the saturated solution tank 6 and the pure water tank 8 are high, the excess solution will flow into the square trough on the outside of the tank wall. The square trough contains a float level controller. When the solution in the square trough reaches a certain height, the internal float level controller sends a signal to the second solenoid valve 17, the sixth solenoid valve 21, the third solenoid valve 18, and the eighth solenoid valve 23. The second solenoid valve 17 and the sixth solenoid valve 21 will close, while the third solenoid valve 18 and the eighth solenoid valve 23 will open, draining the solution from the square trough.

[0063] A water guide pipe is installed at the top of the square trough outside the walls of the saturated solution tank 6 and the pure water tank 8. When there is too much solution in the square trough, it is discharged directly through the water guide pipe to prevent the solution in the square trough from overflowing when the signal is delayed or the equipment fails.

[0064] A fourth solenoid valve 19 is provided between the water purifier 4 and the drain outlet 12;

[0065] The air saturation tank 13 has heating and heat preservation functions. There is a temperature sensor inside the tank. When the liquid level in the air saturation tank 13 is high, the excess solution will flow into the square groove on the outside of the tank wall. The square groove contains a float level controller. When the liquid level in the square groove reaches a certain height, the internal float level controller sends a signal to the fourth solenoid valve 19, and the fourth solenoid valve 19 closes. The air saturation tank and the external square groove are connected. When the solution level in the air saturation tank 13 drops, the solution level in the external square groove will also drop accordingly. When the liquid level is low, the float level controller sends a signal to the fourth solenoid valve 19, and the fourth solenoid valve 19 opens.

[0066] The solutions in the replaceable solute tank 5, pure water tank 8, working solution tank 9, and air saturation tank 13 can be discharged through the drain outlet 12 by opening the corresponding PVC manual valve; each solution tank is equipped with a PVC manual valve, which can be manually controlled for easy maintenance.

[0067] The compressed air, after being cleaned of oil and dirt, should be preheated and humidified. The purpose of preheating is to compensate for the cooling effect when the compressed air expands to atmospheric pressure. The purpose of humidification is to prevent the dry air from carrying away water from the salt solution and reducing the concentration of the salt solution.

[0068] Sufficient salt should be added to the replaceable solute tank 5, and the solute crystals should be at least 500mm in size. The pure water entering the replaceable solute tank 5 should seep out from the bottom of the solute crystals. This ensures that the solute is fully dissolved in the water, so that the solution entering the saturated solution tank 6 reaches a saturated state.

[0069] Each solenoid valve is an electromagnetically controlled industrial device, a fundamental component of automated fluid control systems, used to adjust the direction, flow rate, speed, and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, while ensuring both precision and flexibility.

[0070] The float level controller is as follows: one or more reed switches are installed in a sealed non-magnetic tube, and then the tube is passed through one or more hollow floats with annular magnets inside. The rise or fall of the liquid will cause the floats to move up and down together, thereby causing the reed switches in the non-magnetic tube to engage or disengage, thus outputting a switch signal.

[0071] The water purifier is an external reverse osmosis water purifier that automatically purifies and softens tap water and fills the pure water tank (about 100L). The pure water produced has a pH value of 6.5 to 7.2, a resistivity of (1500 to 2500) Ω·m, and a flow rate that meets the requirement of 15L / h.

[0072] Solenoid valves, float level controllers, and water purifiers are commercially available finished products and do not have many technical requirements.

[0073] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic method for preparing salt spray test solutions, characterized in that, The method is as follows: the test salt solution is automatically prepared by mixing a saturated salt solution at a certain temperature in a saturated salt solution tank with a quantitative amount of pure water to form a salt solution of a specified concentration, and then stored in a salt solution tank for spraying. The system uses a built-in air saturation tank to automatically introduce purified compressed air, after removing impurities, into pure water at a certain temperature, so that the high-pressure air reaches a humidity saturation state at a specified temperature; finally, the humidity-saturated high-pressure air is mixed with the salt solution in the brine tank and atomized and sprayed into the test chamber. The flow meter is used to automatically control the flow rate at each point, and each solution tank can be automatically replenished and the liquid level controlled. The implementation of the method involves an automatic mixing system, which includes: a wastewater inlet (1), a water inlet (2), a manual valve (3), a pure water machine (4), a replaceable solute tank (5), a saturated solution tank (6), a PVC manual valve (7), a pure water tank (8), a working solution tank (9), a first PVC filter (10), a peristaltic pump (11), a drain outlet (12), an air saturation tank (13), an atomizer (14), an air inlet (15), a first solenoid valve (16), a second solenoid valve (17), a third solenoid valve (18), a fourth solenoid valve (19), a fifth solenoid valve (20), a sixth solenoid valve (21), a seventh solenoid valve (22), an eighth solenoid valve (23), a second PVC filter (24), and an air purification device (25). The wastewater inlet (1) is connected to the pure water machine (4); the water inlet (2), the hand valve (3), the first PVC filter (10), and the pure water machine (4) inlet are connected in sequence; The outlet of the pure water machine (4) is connected to the inlet of the replaceable solute tank (5), the inlet of the pure water tank (8), and the inlet of the air saturation tank (13); a second solenoid valve (17) and a PVC hand valve (7) are installed between the pure water machine (4) and the inlet of the replaceable solute tank (5); The outlet of the replaceable solute tank (5) is connected to the inlet of the saturated solution tank (6); The outlet of the saturated solution tank (6) and the outlet of the pure water tank (8) converge and are then connected to the inlet of the solution tank (9); The outlet of the solution tank (9) is connected to the atomizer (14) via a second PVC filter (24) and a peristaltic pump (11); The air inlet (15) is connected to the air purification device (25), and the air purification device (25) is connected to the air saturation tank (13) via the seventh solenoid valve (22); Among them, the wastewater generated in the experiment enters the pure water machine (4) from the wastewater inlet (1) or the tap water enters from the water inlet (2) for filtration and cleaning; After filtration, the purified water enters the replaceable solute tank (5), the pure water tank (8) and the air saturation tank (13). The solution enters the saturated solution tank (6) from the replaceable solute tank (5). The solutions in the saturated solution tank (6) and the pure water tank (8) are mixed and then enter the working solution tank (9). The concentration of the salt solution in the working solution tank (9) is adjusted according to the needs, and the speed at which the solutions in the saturated solution tank (6) and the pure water tank (8) enter the working solution tank (9) is adjusted. The solution flowing out of the solution tank (9) is purified by the PVC filter 24 and then enters the atomizer (14) through the peristaltic pump (11); Pure compressed air, after removing impurities, enters the air purification device (25) through the air inlet (15) and is purified. Then it enters the pure water at a certain temperature in the air saturation tank (13) so that the high-pressure air reaches the humidity saturation state at the specified temperature. The preheated and humidified high-pressure air enters the atomizer to atomize and spray out the salt solution. A fifth solenoid valve (20) is installed between the saturated solution tank (6) and the use solution tank (9), and a first solenoid valve (16) is installed between the pure water tank (8) and the use solution tank (9). When the liquid level in the use solution tank (9) is low, the internal float level controller transmits a signal to the first solenoid valve (16) and the fifth solenoid valve (20). The first solenoid valve (16) and the fifth solenoid valve (20) open, and the solution in the saturated solution tank (6) and the pure water tank (8) flows into the use solution tank (9). When the liquid level in the solution tank 9 is high, the internal float level controller sends a signal to the first solenoid valve (16) and the fifth solenoid valve (20), and the first solenoid valve (16) and the fifth solenoid valve (20) close. In this way, by adjusting and controlling the flow rate of the solution in the first solenoid valve (16) and the fifth solenoid valve (20), the percentage content of salt in the salt solution in the solution tank (9) can be controlled. Among them, a second solenoid valve (17) is provided between the pure water machine (4) and the saturated solution tank (6), a sixth solenoid valve (21) is provided between the pure water machine (4) and the pure water tank (8); a third solenoid valve (18) is provided between the saturated solution tank (6) and the drain outlet (12), and an eighth solenoid valve (23) is provided between the pure water tank (8) and the drain outlet (12). When the equipment is operating normally during the spraying phase, the second solenoid valve (17) and the sixth solenoid valve (21) will open at regular intervals, and the solution will enter the saturated solution tank (6) and the pure water tank (8) respectively. When the liquid level in the saturated solution tank (6) and the pure water tank (8) is high, the excess solution will flow into the square groove on the outside of the tank wall. The square groove contains a float level controller. When the solution in the square groove reaches a certain height, the internal float level controller will send a signal to the second solenoid valve (17), the sixth solenoid valve (21), the third solenoid valve (18), and the eighth solenoid valve (23). The second solenoid valve (17) and the sixth solenoid valve (21) will close, and the third solenoid valve (18) and the eighth solenoid valve (23) will open, draining the solution from the square groove. A water guide pipe is installed at the top of the square trough outside the wall of the saturated solution tank (6) and the pure water tank (8). When there is too much solution in the square trough, it is discharged directly through the water guide pipe to prevent the solution in the square trough from overflowing when the signal is delayed or the equipment fails. A fourth solenoid valve (19) is provided between the water purifier (4) and the drain outlet (12); The air saturation tank (13) has heating and heat preservation functions. There is a temperature sensor inside the tank. When the liquid level in the air saturation tank (13) is high, the excess solution will flow into the square groove outside the tank wall. The square groove contains a float level controller. When the liquid level in the square groove reaches a certain height, the internal float level controller sends a signal to the fourth solenoid valve (19). The fourth solenoid valve (19) closes. The air saturation tank and the external square groove are connected. When the solution in the air saturation tank (13) decreases, the solution level in the external square groove will also decrease. When the liquid level is low, the float level controller sends a signal to the fourth solenoid valve (19). The fourth solenoid valve (19) opens. The solutions in the replaceable solute tank (5), pure water tank (8), working solution tank (9) and air saturation tank (13) can be discharged through the drain outlet (12) by opening the corresponding PVC hand valve; each solution tank is equipped with a PVC hand valve, which can be manually controlled to facilitate maintenance. The compressed air, after being cleaned of oil and dirt, should be preheated and humidified. The purpose of preheating is to compensate for the cooling effect when the compressed air expands to atmospheric pressure. The purpose of humidification is to prevent the dry air from carrying away water from the salt solution and reducing the concentration of the salt solution. Sufficient salt should be added to the replaceable solute tank (5), and the solute crystals should be at least 500 mm in size. The pure water entering the replaceable solute tank (5) should seep out from the bottom of the solute crystals. This will ensure that the solute is fully dissolved in the water and that the solution entering the saturated solution tank (6) reaches a saturated state. Each solenoid valve is an electromagnetically controlled industrial device, a basic component of automation used to control fluids. It is used in industrial control systems to adjust the direction, flow rate, speed and other parameters of the medium. Solenoid valves can be used with different circuits to achieve the desired control, while ensuring both control accuracy and flexibility. The float level controller is as follows: one or more reed switches are installed in a sealed non-magnetic tube, and then the tube is passed through one or more hollow floats with annular magnets inside. The rise or fall of the liquid will cause the floats to move up and down together, thereby causing the reed switches in the non-magnetic tube to engage or disengage, thus outputting a switch signal. The water purifier is an external reverse osmosis water purifier that automatically purifies and softens tap water and fills the pure water tank. The pure water produced has a pH value of 6.5 to 7.2, a resistivity of (1500 to 2500) Ω·m, and a flow rate that meets the requirement of 15L / h.

Images