An apparatus and method for preparing a molybdenum leaching solution using recycled ammonia water

Abstract

The present invention discloses a device and method for preparing a molybdenum leaching solution using recycled ammonia water, belonging to the field of molybdenum leaching solutions. A device for preparing a molybdenum leaching solution using recycled ammonia water includes a separation cylinder, which is connected to a first inlet pipe, a preparation tank, and a dryer. The first inlet pipe is connected to a liquefaction tank and a compression tank. The liquefaction tank is used to liquefy ammonia gas and water vapor into ammonia water, and the compression tank is used to compress ammonia gas and water vapor. A spraying device is provided on the separation cylinder, and the spraying device is connected to the liquefaction tank and the compression tank. Beneficial effects: The technical solution of this application utilizes the by-products generated by the existing production line of the enterprise, that is, recycled ammonia water, to replace pure water for preparing the molybdenum leaching solution, which not only saves the cost of obtaining pure water, but also efficiently utilizes the ammonia water by-product generated by the existing production line of the enterprise, significantly improving the economic benefits of the enterprise.

Description

Technical Field

[0001] The present invention relates to the field of molybdenum solution, and particularly to an apparatus and method for preparing molybdenum solution by using recycled ammonia water. Background Art

[0002] Currently, in the industry, molybdenum solution is generally prepared with pure water. The problem with this method is that whether it is to purchase water-making equipment to produce pure water by oneself or to buy finished pure water from a water station, the cost is relatively high. Summary of the Invention

[0003] The main object of the present invention is to provide an apparatus and method for preparing molybdenum solution by using recycled ammonia water, aiming to solve the problem of high cost of preparing molybdenum solution with pure water currently.

[0004] To solve the above problems, the present invention provides an apparatus for preparing molybdenum solution by using recycled ammonia water, including a separation cylinder, which is connected to an inlet gas pipe 1, a configuration tank, and a dryer. The inlet gas pipe 1 is connected to a liquefaction tank and a compression tank. The liquefaction tank is used to liquefy ammonia gas and water vapor into ammonia water, and the compression tank is used to compress ammonia gas and water vapor. A spraying device is provided on the separation cylinder, and the spraying device is connected to the liquefaction tank and the compression tank. The ammonia water in the liquefaction tank, the compressed ammonia gas and water vapor in the compression tank meet in the spraying device and are sprayed into the separation cylinder in the form of droplets by the spraying device. The ammonia water droplets in the separation cylinder are heated by the ammonia gas and water vapor injected into the separation cylinder through the inlet gas pipe 1, so that the ammonia gas dissolved in the droplets escapes. The droplets from which the ammonia gas has escaped fall and converge at the bottom of the separation cylinder to form an aqueous solution, and the aqueous solution flows into the configuration tank to prepare molybdenum solution. The dryer is used to dry the ammonia gas.

[0005] In one embodiment, the bottom of the separation cylinder is connected to the configuration tank through a liquid inlet pipe 1, and a control valve 2 is provided on the liquid inlet pipe 1;

[0006] The configuration tank has a stirrer, a feeding port, and a liquid discharge pipe, and a control valve 1 is provided on the liquid discharge pipe;

[0007] The inlet gas pipe 1 is connected to the middle part of the separation cylinder through an inlet gas pipe 2;

[0008] The dryer is connected to the top of the separation cylinder through a gas transmission pipe;

[0009] The spraying device is located between the middle part and the top of the separation cylinder.

[0010] In one embodiment, the inlet gas pipe 1 is connected to the upper end inside the liquefaction tank, and the lower end inside the liquefaction tank is connected to the spraying device through a liquid outlet pipe, and a control valve 3 is provided on the liquid outlet pipe;

[0011] A cooling coil is provided inside the liquefaction tank.

[0012] In one embodiment, the compression tank is communicated with the first intake pipe or the second intake pipe or the liquefaction tank through the first outlet pipe, and a fourth control valve is arranged on the first outlet pipe;

[0013] The compression tank is communicated with the injection device through the second outlet pipe, and a fifth control valve is arranged on the second outlet pipe;

[0014] A piston plate is hermetically and slidably installed in the compression tank. A push-pull device, a ranging device, and a gas pressure detection device are fixedly installed on the outer wall of the compression tank. The push-pull device is connected to the piston plate and is used to push the piston plate to slide and compress ammonia gas and water vapor in the compression tank. The ranging device is used to measure the position of the piston plate, and the gas pressure detection device is used to detect the gas pressure of ammonia gas and water vapor in the compression tank;

[0015] There are multiple compression tanks, and they are arranged in parallel.

[0016] In one embodiment, the injection device includes a box body and a nozzle fixedly connected. The box body is fixedly connected to the outer wall of the separation cylinder. The nozzle is located inside the separation cylinder. The nozzle is communicated with the box body. The second outlet pipe and the liquid outlet pipe are communicated with the box body. The jet direction of the second outlet pipe is the same as the spray direction of the nozzle, and the liquid spray direction of the liquid outlet pipe is perpendicular to the jet direction of the second outlet pipe.

[0017] In one embodiment, there are multiple injection devices, and they are symmetrically distributed about the center on the separation cylinder;

[0018] The second outlet pipe is communicated with a first annular pipe, and the liquid outlet pipe is communicated with a second annular pipe. The box body of each injection device is communicated with the first annular pipe through a third intake pipe, and the box body of each injection device is communicated with the second annular pipe through a fourth liquid inlet pipe. The jet direction of the third intake pipe is the same as the spray direction of the nozzle, and the liquid spray direction of the fourth liquid inlet pipe is perpendicular to the jet direction of the third intake pipe.

[0019] In one embodiment, a partition board is arranged in the box body, and the outlet of the third intake pipe is divided into upper and lower parts by the partition board;

[0020] The outlet end of the fourth liquid inlet pipe is only communicated with the second liquid inlet pipe and the third liquid inlet pipe. The second liquid inlet pipe is communicated with the area below the partition board in the box body, and the third liquid inlet pipe is communicated with the area above the partition board in the box body. The liquid spray directions of the second liquid inlet pipe and the third liquid inlet pipe are perpendicular to the jet direction of the third intake pipe.

[0021] In one embodiment, the third intake pipe and the fourth liquid inlet pipe are communicated through a fourth intake pipe. The air outlet end of the fourth intake pipe is located inside the fourth liquid inlet pipe, and the air outlet direction of the fourth intake pipe is the same as the liquid flow direction inside the fourth liquid inlet pipe;

[0022] A control valve six is provided on the intake pipe four, and a plurality of air outlet holes distributed in an annular array are provided at the air outlet end of the intake pipe four.

[0023] In addition, the present invention also proposes a method for preparing a molybdenum leaching solution using recycled ammonia water, and an apparatus for preparing a molybdenum leaching solution using recycled ammonia water according to any one of the foregoing is used to perform the following steps:

[0024] Inject ammonia gas and water vapor into the liquefaction tank and the compression tank through the intake pipe one, liquefy the ammonia gas and water vapor into ammonia water through the liquefaction tank, the liquefied ammonia water converges at the bottom of the liquefaction tank, and compress the ammonia gas and water vapor through the compression tank;

[0025] Inject the ammonia water in the liquefaction tank, the compressed ammonia gas and water vapor in the compression tank into the spraying device, spray ammonia water droplets into the separation cylinder through the spraying device, and at the same time inject ammonia gas and water vapor into the separation cylinder. The ammonia water droplets descend and mix with the rising ammonia gas and water vapor to heat the ammonia water droplets, so that ammonia gas escapes from the ammonia water droplets. The droplets from which ammonia gas has escaped fall to the bottom of the separation cylinder and converge into an aqueous solution, and the ammonia gas rises and enters the dryer for drying;

[0026] Inject the aqueous solution into the preparation tank to prepare the molybdenum leaching solution.

[0027] In one embodiment, the temperature range of the ammonia gas and water vapor injected into the separation cylinder is 38°C - 70°C.

[0028] Beneficial effects: 1. The technical solution of the present application uses the by-product generated by the enterprise's existing production line, that is, recycled ammonia water, to replace pure water to prepare the molybdenum leaching solution, which not only saves the cost of obtaining pure water, but also efficiently utilizes the ammonia water by-product generated by the enterprise's existing production line, significantly improving the economic benefits of the enterprise;

[0029] 2. By atomizing the ammonia water to form ammonia water spray, and then heating the ammonia water spray to make the ammonia gas dissolved in the ammonia water droplets escape and separate from the droplets. The droplets fall and converge to form an aqueous solution with a very low ammonia water concentration. Finally, this aqueous solution with a very low ammonia water concentration is used to prepare the molybdenum leaching solution. This approach can reduce the acid used to neutralize the ammonia water compared to directly using recycled ammonia water to prepare the molybdenum leaching solution, reducing the acid cost for preparing the molybdenum leaching solution;

[0030] 3. Use the ammonia gas and water vapor generated by the enterprise's existing production line to heat the ammonia water spray, making full use of the thermal energy contained in the ammonia gas and water vapor, and there is no need to consume electricity to prepare pure hot air to heat the ammonia water spray, further reducing the cost of preparing the molybdenum leaching solution. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0032] Figure 1 is a schematic structural diagram of an apparatus for preparing a molybdenum leaching solution using recycled ammonia water in the present invention. The dashed line in the preparation tank in the figure is the stirring paddle of the stirrer;

[0033] Figure 2 is Figure 1 the enlarged view of part A in

[0034] Figure 3 is Figure 1 the enlarged view of part C in

[0035] Figure 4 is Figure 2 the enlarged view of part B in

[0036] Figure 5 is the internal structure diagram of the compression tank of the present invention.

[0037] The description of the reference numerals is as follows:

[0038] 1. Preparation tank; 2. Stirrer; 3. Feeding port; 4. Drain pipe; 5. Control valve I; 6. Inlet pipe I; 7. Control valve II; 8. Separation cylinder; 9. Gas transmission pipe; 10. Dryer; 11. Inlet gas pipe I; 12. Inlet gas pipe II; 13. Liquefaction tank; 14. Cooling coil; 15. Outlet pipe; 16. Control valve III; 17. Outlet gas pipe I; 18. Control valve IV; 19. Compression tank; 20. Pushing and pulling device; 21. Piston plate; 22. Distance measuring device; 23. Air pressure detection device; 24. Outlet gas pipe II; 25. Control valve V; 26. Annular pipe I; 27. Inlet gas pipe III;

[0039] 28. Injection device; 281. Box body; 282. Nozzle; 283. Partition plate; 284. Inlet liquid pipe II; 285. Inlet liquid pipe III;

[0040] 29. Annular pipe II; 30. Inlet liquid pipe IV; 31. Inlet gas pipe IV; 32. Control valve VI; 33. Air outlet hole. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0043] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0045] The enterprise where the inventor is located originally had an ammonium molybdate solution concentration and evaporation production line. During the concentration and evaporation process of the ammonium molybdate solution, a large amount of ammonia and water vapor are generated. These ammonia and water vapor were originally to enter the wastewater evaporation system for treatment and were not well utilized. Therefore, if recycled ammonia water can be used to replace pure water to prepare the molybdenum solution, it not only saves the cost of obtaining pure water but also efficiently utilizes the ammonia by-product generated by the enterprise's existing production line, significantly improving the economic benefits of the enterprise.

[0046] The present invention provides a device for preparing a molybdenum leaching solution using recycled ammonia water. This device utilizes the by-products generated by an enterprise's existing production line, namely recycled ammonia water, to replace pure water in preparing the molybdenum leaching solution. This not only saves the cost of obtaining pure water but also efficiently utilizes the ammonia by-product generated by the enterprise's existing production line, significantly enhancing the economic benefits of the enterprise.

[0047] Specifically, in an embodiment of the invention, as Figure 1 shown, the device for preparing a molybdenum leaching solution using recycled ammonia water includes a separation cylinder 8, and the separation cylinder 8 is connected to an air inlet pipe 11, a preparation tank 1, and a dryer 10. Specifically, the bottom of the separation cylinder 8 is connected to the preparation tank 1 through a liquid inlet pipe 6. A control valve 7 is provided on the liquid inlet pipe 6. The aqueous solution formed by the convergence at the bottom of the separation cylinder 8 enters the preparation tank 1 through the liquid inlet pipe 6 to prepare the molybdenum leaching solution, and the control valve 7 is used to control the opening and closing of the liquid inlet pipe 6.

[0048] In this embodiment, as Figure 1 shown, the preparation tank 1 has a stirrer 2, a feeding port 3, and a liquid discharge pipe 4. A control valve 5 is provided on the liquid discharge pipe 4. The feeding port 3 is used to add acid into the preparation tank 1, and the stirrer 2 is used to stir the acid and the aqueous solution to quickly mix them and improve the efficiency of preparing the molybdenum leaching solution. The prepared molybdenum leaching solution is discharged from the liquid discharge pipe 4, and the control valve 5 is used to control the opening and closing of the liquid discharge pipe 4.

[0049] In this embodiment, as Figure 1 shown, the air inlet pipe 11 is connected to the middle of the separation cylinder 8 through an air inlet pipe 12. Ammonia gas and water vapor with a certain temperature generated by the enterprise's existing production line (such as an ammonium molybdate solution concentration and evaporation production line) enter the separation cylinder 8 through the air inlet pipe 11 and the air inlet pipe 12.

[0050] In this embodiment, as Figure 1 shown, the dryer 10 is connected to the top of the separation cylinder 8 through an air delivery pipe 9. The air delivery pipe 9 is relatively long. Such a design is conducive to reducing the temperature of ammonia gas and a small amount of water vapor, so that the temperature of the gas entering the dryer 10 is not too high, avoiding the water vapor adsorbed by the desiccant in the dryer 10 from being heated and evaporating again and mixing into the dried ammonia gas, reducing the drying quality of ammonia gas. In addition, it is also conducive to liquefying the water vapor in the air delivery pipe 9 and flowing it back to the separation cylinder 8, reducing the water vapor entering the dryer 10 and extending the service life of the dryer 10.

[0051] In this embodiment, the air inlet pipe 11 is connected to a liquefaction tank 13 and a compression tank 19. The liquefaction tank 13 is used to liquefy ammonia gas and water vapor into ammonia water, and the compression tank 19 is used to compress ammonia gas and water vapor. Specifically, as Figure 1As shown, the first intake pipe 11 communicates with the upper end inside the liquefaction tank 13. A cooling coil 14 is arranged inside the liquefaction tank 13. The ammonia gas and water vapor in the first intake pipe 11 are liquefied into ammonia water by the cooling coil 14 after entering the liquefaction tank 13, and the ammonia water converges at the bottom inside the liquefaction tank 13.

[0052] Specifically, as Figure 1 and Figure 5 shown, the compression tank 19 communicates with the first intake pipe 11 or the second intake pipe 12 or the liquefaction tank 13 through the first outlet pipe 17. The ammonia water and water vapor in the first intake pipe 11 or the second intake pipe 12 or the liquefaction tank 13 enter the compression tank 19 through the first outlet pipe 17. A control valve four 18 is arranged on the first outlet pipe 17 to control the on-off of the first outlet pipe 17. As Figure 5 shown, a piston plate 21 is hermetically and slidably installed inside the compression tank 19. A pushing and pulling device 20, a ranging device 22, and a gas pressure detection device 23 are fixedly installed on the outer wall of the compression tank 19. The pushing and pulling device 20 is connected to the piston plate 21 and is used to push the piston plate 21 to slide and compress the ammonia gas and water vapor inside the compression tank 19. The ranging device 22 is used to measure the position of the piston plate 21 so that the controller controls the action of the pushing and pulling device 20 according to the detection data of the ranging device 22. The gas pressure detection device 23 is used to detect the gas pressure of the ammonia gas and water vapor inside the compression tank 19. When the ammonia gas and water vapor are compressed to the set value, the controller controls the pushing and pulling device 20 to stop acting according to the detection data of the gas pressure detection device 23.

[0053] In this embodiment, as Figure 1 shown, a spraying device 28 is arranged on the separation cylinder 8. The spraying device 28 communicates with the liquefaction tank 13 and the compression tank 19. Specifically, the lower end inside the liquefaction tank 13 communicates with the spraying device 28 through a liquid outlet pipe 15. A control valve three 16 is arranged on the liquid outlet pipe 15. The ammonia water inside the liquefaction tank 13 flows into the spraying device 28 through the liquid outlet pipe 15. The control valve three 16 is used to control the on-off of the liquid outlet pipe 15. The compression tank 19 communicates with the spraying device 28 through a second outlet pipe 24. A control valve five 25 is arranged on the second outlet pipe 24. The compressed ammonia gas and water vapor inside the compression tank 19 enter the spraying device 28 through the second outlet pipe 24. The control valve five 25 is used to control the on-off of the second outlet pipe 24. The ammonia water inside the liquefaction tank 13, the compressed ammonia gas and water vapor inside the compression tank 19 meet inside the spraying device 28 and are sprayed into the separation cylinder 8 in the form of droplets by the spraying device 28. Specifically, as Figures 1 - 3As shown, the spraying device 28 includes a box body 281 and a nozzle 282 that are fixedly connected. The box body 281 is fixedly connected to the outer wall of the separation cylinder 8. The nozzle 282 is located inside the separation cylinder 8. The nozzle 282 communicates with the box body 281. The second air outlet pipe 24 and the liquid outlet pipe 15 communicate with the box body 281. The jetting direction of the second air outlet pipe 24 is the same as the spraying direction of the nozzle 282. The liquid spraying direction of the liquid outlet pipe 15 is perpendicular to the jetting direction of the second air outlet pipe 24. With such a design, after the ammonia water in the liquefaction tank 13, the compressed ammonia gas and water vapor in the compression tank 19 meet in the box body 281, the ammonia water is dispersed by the compressed ammonia gas and water vapor and is injected into the separation cylinder 8 in the form of droplets through the nozzle 282, forming ammonia water spray droplets. The ammonia water spray droplets descend in the separation cylinder 8 under the action of their own weight. The ammonia gas and water vapor with a certain temperature injected into the separation cylinder 8 through the first inlet pipe 11 rise in the separation cylinder 8 and come into contact and mix with the ammonia water spray droplets. The ammonia water spray droplets are heated by the ammonia gas and water vapor. The temperature range of the ammonia gas and water vapor entering the separation cylinder 8 is 38°C - 70°C. At this temperature, ammonium hydroxide monohydrate in the droplets boils, generating ammonia gas bubbles that escape from the droplets, thereby reducing the ammonia solubility in the droplets. The ammonia gas rises in the separation cylinder 8 and then enters the dryer 10 for drying to obtain dry ammonia gas for other uses. The ammonia gas and water vapor at 38°C - 70°C can only cause a small amount of evaporation of the water in the droplets, and most of the droplets continue to descend and finally converge at the bottom of the separation cylinder 8 to form an aqueous solution. The ammonia water concentration in this aqueous solution is small, and less acid is consumed for preparing the molybdenum leaching solution.

[0054] In this embodiment, a device for preparing a molybdenum leaching solution by using recycled ammonia water atomizes the ammonia water to form ammonia water spray, and then heats the ammonia water spray to make the ammonia gas dissolved in the ammonia water droplets escape and separate from the droplets. The droplets fall and converge to form an aqueous solution with a very small ammonia water concentration. Finally, the molybdenum leaching solution is prepared with this aqueous solution with a very small ammonia water concentration. This measure can reduce the acid used for neutralizing ammonia water compared with directly preparing the molybdenum leaching solution with recycled ammonia water, reduce the acid cost for preparing the molybdenum leaching solution. At the same time, the ammonia gas and water vapor with a certain temperature generated by the existing production line of the enterprise are used to heat the ammonia water spray, making full use of the thermal energy contained in the ammonia gas and water vapor, without the need to consume electricity to prepare pure hot air to heat the ammonia water spray, which is energy-saving and environmentally friendly, and further reduces the cost of preparing the molybdenum leaching solution.

[0055] In this embodiment, there are multiple compression tanks 19, and they are arranged in parallel relative to the first air outlet pipe 17 and the second air outlet pipe 24. With such a design, when the compressed ammonia gas and water vapor in one compression tank 19 are used up, the control valve five 25 on this compression tank 19 is immediately controlled to close, and at the same time, the control valve five 25 on another compression tank 19 is opened to continue supplying compressed ammonia gas and water vapor to the spraying device 28. While the compression tank 19 supplies compressed ammonia gas and water vapor to the spraying device 28, the pushing and pulling device 20 continues to push the piston plate 21 to slide to maintain the constant air pressure in the compression tank 19.

[0056] In this embodiment, when the compressed ammonia gas and water vapor in a compression tank 19 are used up and the fifth control valve 25 is closed, the fourth control valve 18 on the compression tank 19 is opened, and the push-pull device 20 is controlled to pull the piston plate 21 to reset, so that the ammonia water and water vapor in the first intake pipe 11 or the second intake pipe 12 or the liquefaction tank 13 enter the compression tank 19. After a period of time, the fourth control valve 18 is closed, and the push-pull device 20 is controlled to push the piston plate 21 to compress the ammonia water and water vapor in the compression tank 19 until the air pressure in the compression tank 19 reaches the set value, and then wait for the compressed ammonia gas and water vapor in other compression tanks 19 to be used up. The set value is freely set according to actual use requirements, as long as it is ensured that the ammonia gas and water vapor in the compression tank 19 do not liquefy under the pressure of the set value, that is, when compressing the mixed gas of compressed ammonia gas and water vapor, it is necessary to ensure that the partial pressures of both are lower than the saturated vapor pressure at their current temperature to avoid liquefaction. For example, when the ammonia gas accounts for 90% and the water vapor accounts for 10% in the mixed gas in the compression tank 19, and the temperature in the compression tank 19 always remains at 50 °C, the saturated vapor pressure of ammonia gas is 20.33 Bar, and the saturated vapor pressure of water vapor is 0.12 Bar. The total pressure in the compression tank 19, that is, the set value pressure × 0.9 ≤ 20.33 Bar, and at the same time the set value pressure × 0.1 ≤ 0.12 Bar. After the above two conditions are met simultaneously, the set value pressure ≤ 1.2 Bar is obtained. That is, when the ammonia gas accounts for 90% and the water vapor accounts for 10% in the mixed gas in the compression tank 19, and the temperature in the compression tank 19 always remains at 50 °C, the set value does not exceed 1.2 Bar, otherwise the water vapor will liquefy first. The specific values of the saturated vapor pressures of ammonia gas and water vapor at different temperatures are common knowledge and will not be elaborated in this article. By changing the ratio of ammonia gas and water vapor in the mixed gas in the compression tank 19 and changing the temperature in the compression tank 19, the corresponding set value pressure also changes. During actual use, the ratio of ammonia gas and water vapor in the mixed gas and the temperature in the compression tank 19 (the temperature in the compression tank 19 remains unchanged during the compression process of the mixed gas) can be set according to the actual situation on site.

[0057] In this embodiment, as Figures 1 - 3 shown, the spraying device 28 is located between the middle and the top of the separation cylinder 8. There are multiple spraying devices 28, and they are symmetrically distributed about the center on the separation cylinder 8; the second outlet pipe 24 is communicated with a first annular pipe 26, and the liquid outlet pipe 15 is communicated with a second annular pipe 29. The box body 281 of each spraying device 28 is communicated with the first annular pipe 26 through a third intake pipe 27, and the box body 281 of each spraying device 28 is communicated with the second annular pipe 29 through a fourth liquid inlet pipe 30. The jetting direction of the third intake pipe 27 is the same as the spraying direction of the nozzle 282, and the liquid spraying direction of the fourth liquid inlet pipe 30 is perpendicular to the jetting direction of the third intake pipe 27. AsFigure 3 as shown by the arrow therein.

[0058] Furthermore, as Figures 1 - 3 shown, a partition plate 283 is arranged in the box body 281, and the partition plate 283 divides the outlet of the third inlet pipe 27 into upper and lower parts; the outlet end of the fourth inlet pipe 30 is only communicated with the second inlet pipe 284 and the third inlet pipe 285. The second inlet pipe 284 is communicated with the area below the partition plate 283 in the box body 281, and the third inlet pipe 285 is communicated with the area above the partition plate 283 in the box body 281. The liquid spraying directions of the second inlet pipe 284 and the third inlet pipe 285 are perpendicular to the gas spraying direction of the third inlet pipe 27. By using the partition plate 283 to divide the outlet of the third inlet pipe 27 into upper and lower parts, and using the second inlet pipe 284 and the third inlet pipe 285 to divide the aqueous solution in the fourth inlet pipe 30 into two parts and respectively send them into the areas above and below the partition plate 283, the design further enhances the mixing uniformity of the aqueous solution, compressed ammonia gas and water vapor, makes the mist droplets sprayed by the nozzle 282 more uniform, and has a better ammonia separation effect.

[0059] Even further, in this embodiment, as Figures 2 - 4 shown, the third inlet pipe 27 and the fourth inlet pipe 30 are communicated through a fourth inlet pipe 31. The gas outlet end of the fourth inlet pipe 31 is located in the fourth inlet pipe 30, and the gas outlet direction of the fourth inlet pipe 31 is the same as the liquid flow direction in the fourth inlet pipe 30; a control valve six 32 is arranged on the fourth inlet pipe 31, and a plurality of air outlet holes 33 distributed in an annular array are arranged at the gas outlet end of the fourth inlet pipe 31. With such a design, pre - mixing and heating of compressed ammonia gas, water vapor and the aqueous solution are carried out in advance, further improving the mixing uniformity of the aqueous solution, compressed ammonia gas and water vapor, increasing the temperature of the mist droplets sprayed by the nozzle 282, making the mist droplets sprayed by the nozzle 282 more uniform, having a fast ammonia separation speed, high efficiency and better separation effect.

[0060] In addition, the present invention also proposes a method for preparing a molybdenum - removing solution by using recycled ammonia water. An apparatus for preparing a molybdenum - removing solution by using recycled ammonia water according to any one of the foregoing items is used to perform the following steps:

[0061] Inject ammonia gas and water vapor into the liquefaction tank 13 and the compression tank 19 through the first inlet pipe 11. Liquefy ammonia gas and water vapor into ammonia water through the liquefaction tank 13. The liquefied ammonia water converges at the bottom of the liquefaction tank 13, and compress ammonia gas and water vapor through the compression tank 19;

[0062] Inject the ammonia water in the liquefaction tank 13, the compressed ammonia gas and water vapor in the compression tank 19 into the injection device 28. Through the injection device 28, spray ammonia water droplets into the separation cylinder 8, and at the same time inject ammonia gas and water vapor into the separation cylinder 8. The ammonia water droplets fall and mix with the rising ammonia gas and water vapor to heat the ammonia water droplets, causing the ammonia water droplets to escape ammonia gas. The droplets that have escaped ammonia gas fall to the bottom of the separation cylinder 8 and converge into an aqueous solution, and the ammonia gas rises and enters the dryer 10 for drying;

[0063] Inject the aqueous solution into the configuration tank 1 to prepare the molybdenum leaching solution.

[0064] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A device for preparing molybdenum solution by recycling ammonia water, characterized in that: The invention comprises a separation cylinder, wherein the separation cylinder is connected with an air inlet pipe 1, a configuration box, and a dryer. The air inlet pipe 1 is connected with a liquefaction box and a compression box. The liquefaction box is used to liquefy ammonia gas and water vapor into ammonia water. The compression box is used to compress ammonia gas and water vapor. An injection device is provided on the separation cylinder, and the injection device is connected with the liquefaction box and the compression box. After the ammonia water in the liquefaction box and the compressed ammonia gas and water vapor in the compression box meet in the injection device, the injection device is injected into the separation cylinder in the form of droplets by the injection device. The ammonia water droplets in the separation cylinder are heated by the ammonia gas and water vapor injected into the separation cylinder by the air inlet pipe 1, so that the ammonia gas dissolved in the droplets escapes. The droplets of the escaping ammonia gas descend and gather at the bottom of the separation cylinder to form an aqueous solution. The aqueous solution flows into the configuration box to configure a molybdenum solution. The dryer is used to dry the ammonia gas. The air inlet pipe 1 is connected to the upper end of the interior of the liquefied tank, and the lower end of the interior of the liquefied tank is connected to the injection device through the liquid outlet pipe; The compression box is connected to the air inlet pipe 1 or the air inlet pipe 2 or the liquefied tank through the air outlet pipe 1, and the compression box is connected to the injection device through the air outlet pipe 2; The spray device comprises a box body and a nozzle which are fixedly connected, the box body is fixedly connected to the outer wall of the separation cylinder, the nozzle is located in the separation cylinder, the nozzle is connected to the box body, the second air outlet pipe and the liquid outlet pipe are connected to the box body, the jetting direction of the second air outlet pipe is the same as the spraying direction of the nozzle, and the liquid outlet pipe has a jetting direction perpendicular to the jetting direction of the second air outlet pipe; The air outlet pipe 2 is connected to the annular pipe 1, the liquid outlet pipe is connected to the annular pipe 2, the box body of each spray device is connected to the annular pipe 1 through the air inlet pipe 3, and the box body of each spray device is connected to the annular pipe 2 through the liquid inlet pipe 4. The jet direction of the air inlet pipe 3 is the same as the spray direction of the nozzle, and the liquid spray direction of the liquid inlet pipe 4 is perpendicular to the jet direction of the air inlet pipe 3; A partition is arranged in the box body, and the partition divides the outlet of the air inlet pipe three into two parts, the upper and lower parts; the outlet end of the liquid inlet pipe four is only connected with the liquid inlet pipe two and the liquid inlet pipe three, the liquid inlet pipe two is connected with the area below the partition in the box body, and the liquid inlet pipe three is connected with the area above the partition in the box body, and the liquid spraying direction of the liquid inlet pipe two and the liquid inlet pipe three is perpendicular to the jetting direction of the air inlet pipe three.

2. A device for preparing a molybdenum solution by recycling ammonia water as claimed in claim 1, characterized in that: The bottom of the separation cylinder is connected to the configuration box through a liquid inlet pipe 1, and a control valve 2 is provided on the liquid inlet pipe 1; The configuration box has an agitator, a feeding port and a liquid discharge pipe, and the liquid discharge pipe is provided with a control valve 1; The air inlet pipe 1 is connected to the middle part of the separation cylinder through the air inlet pipe 2; The dryer is connected to the top of the separation cylinder through an air delivery pipe; The injection device is located between the middle and the top of the separation cylinder.

3. A device for preparing a molybdenum solution by recycling ammonia water as claimed in claim 1, characterized in that: The liquid outlet pipe is provided with a control valve three; A cooling coil is arranged inside the liquefaction tank.

4. The device for preparing a molybdenum solution by recycling ammonia water as claimed in claim 1, characterized in that: The air outlet pipe 1 is provided with a control valve 4; The second air outlet pipe is provided with a control valve five; A piston plate is sealed and slidably installed in the compression box, and a push-pull device, a distance measuring device, and an air pressure detection device are fixedly installed on the outer wall of the compression box. The push-pull device is connected to the piston plate and is used to push the piston plate to slide and compress the ammonia and water vapor in the compression box. The distance measuring device is used to measure the position of the piston plate, and the air pressure detection device is used to detect the air pressure of the ammonia and water vapor in the compression box. There are multiple compression boxes, which are arranged in parallel.

5. The device for preparing a molybdenum solution by recycling ammonia water as claimed in claim 1, characterized in that: There are multiple injection devices, which are centrally symmetrically distributed on the separation cylinder.

6. The device for preparing a molybdenum solution by recycling ammonia water as claimed in claim 1, characterized in that: The air inlet pipe three and the liquid inlet pipe four are connected through the air inlet pipe four, the air outlet end of the air inlet pipe four is located in the liquid inlet pipe four, and the air outlet direction of the air inlet pipe four is the same as the liquid flow direction in the liquid inlet pipe four; The air inlet pipe 4 is provided with a control valve 6, and the air outlet end of the air inlet pipe 4 is provided with a plurality of air outlet holes distributed in a circular array.

7. A method for preparing a molybdenum solution using recycled ammonia water, characterized in that: The following steps are performed using a device for preparing a molybdenum solution by recycling ammonia water according to any one of claims 1 to 6: Ammonia gas and water vapor are injected into the liquefaction tank and the compression tank through the air inlet pipe 1, and the ammonia gas and water vapor are liquefied into ammonia water through the liquefaction tank. The liquefied ammonia water is gathered at the bottom of the liquefaction tank, and the ammonia gas and water vapor are compressed through the compression tank; Injecting ammonia water in the liquefaction tank, compressed ammonia gas and water vapor in the compression tank into the injection device, spraying ammonia water droplets into the separation cylinder through the injection device, and injecting ammonia gas and water vapor into the separation cylinder at the same time, the ammonia water droplets descend and mix with the rising ammonia gas and water vapor to heat the ammonia water droplets, so that ammonia gas escapes from the ammonia water droplets, and the ammonia gas escaping from the ammonia droplets falls to the bottom of the separation cylinder and gathers into a water solution, and the ammonia gas rises and enters the dryer for drying; Inject the aqueous solution into the preparation box to prepare the molybdenum solution.

8. A method for preparing a platinum solution by recycling ammonia water as claimed in claim 7, characterized in that: The temperature range of ammonia gas and water vapor injected into the separation cylinder is 38°C-70°C.

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