Equipment and method for preparing molybdenum solution by utilizing recycled ammonia water

Abstract

The invention discloses equipment and a method for preparing molybdenum solution by utilizing recycled ammonia water, and belongs to the field of molybdenum solution. The equipment for preparing the molybdenum solution by utilizing the recycled ammonia water comprises a separation cylinder, the separation cylinder is communicated with a first air inlet pipe, a preparation box and a dryer, and the first air inlet pipe is communicated with a liquefaction box and a compression box; the liquefying box is used for liquefying ammonia gas and water vapor into ammonia water, the compressing box is used for compressing the ammonia gas and the water vapor, and a spraying device is arranged on the separating cylinder and communicated with the liquefying box and the compressing box. The method has the beneficial effects that by-products generated by the existing production line of an enterprise, namely recovered ammonia water, are utilized to replace pure water to prepare the molybdenum solution, so that the cost of obtaining the pure water is saved, the ammonia water by-products generated by the existing production line of the enterprise are efficiently utilized, and the economic benefits of the enterprise are remarkably improved.

Description

Technical Field

[0001] The invention relates to the field of molybdenum dissolving liquid, and in particular to a device and a method for preparing molybdenum dissolving liquid by utilizing recycled ammonia water. Background Art

[0002] Currently, pure water is generally used to prepare molybdenum dissolving liquid in the industry. The problem with this method is that the cost is relatively high regardless of whether one purchases water-making equipment to make pure water by oneself or purchases finished pure water from a water station. Summary of the invention

[0003] The main purpose of the present invention is to provide a device and method for preparing molybdenum solution by using recycled ammonia water, aiming to solve the problem of high cost of preparing molybdenum solution by using pure water.

[0004] In order to solve the above problems, the present invention proposes a device for preparing molybdenum dissolving liquid using recycled ammonia water, comprising a separation cylinder, 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, the separation cylinder is provided with a spray device, the spray device is connected with the liquefaction box and the compression box, the ammonia water in the liquefaction box, the compressed ammonia gas and water vapor in the compression box meet in the spray device and are injected into the separation cylinder in the form of droplets by the spray 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 prepare the molybdenum dissolving liquid, and the dryer is used to dry the ammonia gas.

[0005] In one embodiment, 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.

[0006] In one embodiment, 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 a liquid outlet pipe, and a control valve 3 is provided on the liquid outlet pipe; A cooling coil is arranged inside the liquefaction tank.

[0007] In one embodiment, 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 air outlet pipe 1 is provided with a control valve 4; The compression box is connected to the injection device through an air outlet pipe 2, and a control valve 5 is provided on the air outlet pipe 2; 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.

[0008] In one embodiment, the injection device includes 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 inside the separation cylinder, the nozzle is connected to the box body, the air outlet pipe 2 and the liquid outlet pipe are connected to the box body, the injection direction of the air outlet pipe 2 is the same as the spray direction of the nozzle, and the liquid injection direction of the liquid outlet pipe is perpendicular to the injection direction of the air outlet pipe 2.

[0009] In one embodiment, there are multiple injection devices, which are centrally and symmetrically distributed on the separation cylinder; 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 injection device is connected to the annular pipe 1 through the air inlet pipe 3, and the box body of each injection 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.

[0010] In one embodiment, a partition is provided in the box body, and the partition divides the outlet of the air inlet pipe 3 into two parts, an upper part and an lower part; The outlet end of the liquid inlet pipe four is only connected to the liquid inlet pipe two and the liquid inlet pipe three. The liquid inlet pipe two is connected to the area below the partition in the box body, and the liquid inlet pipe three is connected to the area above the partition in the box body. 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.

[0011] In one embodiment, 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.

[0012] In addition, the present invention also proposes a method for preparing a molybdenum solution by using recycled ammonia water, and the following steps are performed using any one of the above-mentioned devices for preparing a molybdenum solution by using recycled ammonia water: 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.

[0013] In one embodiment, the temperature of the ammonia gas and water vapor injected into the separation cylinder ranges from 38°C to 70°C.

[0014] Beneficial effects: 1. The technical solution of the present application utilizes the by-products generated by the existing production line of the enterprise, that is, recycled ammonia water to replace pure water to prepare the molybdenum solution, which not only saves the cost of obtaining pure water, but also efficiently utilizes the ammonia water by-products generated by the existing production line of the enterprise, significantly improving the economic benefits of the enterprise; 2. Ammonia water is atomized to form an ammonia water spray, and then the ammonia water spray is heated to make the ammonia gas dissolved in the ammonia water droplets escape and separate from the droplets. The droplets fall and gather to form an aqueous solution with a very low ammonia concentration. Finally, the aqueous solution with a very low ammonia concentration is used to prepare the molybdenum solution. Compared with directly using recycled ammonia water to prepare the molybdenum solution, this can reduce the acid used to neutralize the ammonia water and reduce the acid cost for preparing the molybdenum solution; 3. Use the ammonia and water vapor generated by the company's existing production lines to heat the ammonia spray, making full use of the thermal energy contained in the ammonia and water vapor. There is no need to consume electricity to prepare pure hot air to heat the ammonia spray, further reducing the cost of dissolving molybdenum liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the structure of a device for preparing molybdenum solution by using recycled ammonia water according to the present invention, wherein the dotted line in the configuration box in the figure is a stirring paddle of a stirrer; Figure 2 yes Figure 1 A magnified view of part A in FIG. Figure 3 yes Figure 1 The enlarged view of the C part in FIG. Figure 4 yes Figure 2 A magnified view of part B in FIG. Figure 5 It is the internal structure diagram of the compression box of the present invention.

[0017] The following are the descriptions of the reference numerals: 1. Configuration box; 2. Agitator; 3. Feeding port; 4. Drain pipe; 5. Control valve 1; 6. Liquid inlet pipe 1; 7. Control valve 2; 8. Separation cylinder; 9. Gas transmission pipe; 10. Dryer; 11. Gas inlet pipe 1; 12. Gas inlet pipe 2; 13. Liquefaction box; 14. Cooling coil; 15. Liquid outlet pipe; 16. Control valve 3; 17. Gas outlet pipe 1; 18. Control valve 4; 19. Compression box; 20. Push-pull device; 21. Piston plate; 22. Distance measuring device; 23. Air pressure detection device; 24. Gas outlet pipe 2; 25. Control valve 5; 26. Ring pipe 1; 27. Gas inlet pipe 3; 28. Spraying device; 281. Box body; 282. Nozzle; 283. Partition plate; 284. Second liquid inlet pipe; 285. Third liquid inlet pipe; 29. Annular pipe 2; 30. Liquid inlet pipe 4; 31. Air inlet pipe 4; 32. Control valve 6; 33. Air outlet. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The company where the inventor works originally had an ammonium molybdate solution concentration and evaporation production line. A large amount of ammonia and water vapor will be generated during the concentration and evaporation process of the ammonium molybdate solution. These ammonia and water vapor were originally intended to enter the wastewater evaporation system for treatment and were not well utilized. Therefore, if recycled ammonia water can be used instead of pure water to prepare the molybdenum solution, it will not only save the cost of obtaining pure water, but also efficiently utilize the ammonia by-product generated by the company's existing production line, significantly improving the company's economic benefits.

[0023] The present invention proposes a device for preparing molybdenum dissolving liquid by utilizing recycled ammonia water. The device utilizes the by-product generated by the existing production line of the enterprise, that is, recycled ammonia water to replace pure water to prepare the molybdenum dissolving liquid, 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, thereby significantly improving the economic benefits of the enterprise.

[0024] Specifically, in one embodiment of the invention, Figure 1 As shown, the device for preparing molybdenum solution by using recycled ammonia water includes a separation cylinder 8, and the separation cylinder 8 is connected to an air inlet pipe 11, a configuration box 1, and a dryer 10. Specifically, the bottom of the separation cylinder 8 is connected to the configuration box 1 through a liquid inlet pipe 6, and a control valve 7 is provided on the liquid inlet pipe 6. The aqueous solution gathered at the bottom of the separation cylinder 8 enters the configuration box 1 through the liquid inlet pipe 6 to prepare the molybdenum solution, and the control valve 7 is used to control the opening and closing of the liquid inlet pipe 6.

[0025] In this embodiment, if Figure 1 As shown, the configuration box 1 has an agitator 2, a feeding port 3 and a drain pipe 4, and the drain pipe 4 is provided with a control valve 5. The feeding port 3 is used to add acid into the configuration box 1, and the agitator 2 is used to stir the acid and the aqueous solution to quickly mix them and improve the configuration efficiency of the molybdenum solution. The configured molybdenum solution is discharged from the drain pipe 4, and the control valve 5 is used to control the opening and closing of the drain pipe 4.

[0026] In this embodiment, if Figure 1 As shown, the air inlet pipe 1 11 is connected to the middle part of the separation cylinder 8 through the air inlet pipe 2 12, and ammonia and water vapor with a certain temperature generated by the company's existing production line (such as the ammonium molybdate solution concentration and evaporation production line) enter the separation cylinder 8 through the air inlet pipe 1 11 and the air inlet pipe 2 12.

[0027] In this embodiment, if Figure 1 As shown, the dryer 10 is connected to the top of the separation cylinder 8 through the gas pipe 9. The gas pipe 9 is relatively long. Such a design is conducive to lowering the temperature of ammonia and a small amount of water vapor, so that the temperature of the gas entering the dryer 10 is not high, and it is avoided that the high gas temperature causes the water vapor adsorbed by the desiccant in the dryer 10 to evaporate again due to heat and leave the dryer 10 to mix with the dried ammonia, thereby reducing the drying quality of the ammonia. In addition, it is also conducive to liquefying the water vapor in the gas pipe 9 and flowing back to the separation cylinder 8, thereby reducing the water vapor entering the dryer 10 and extending the service life of the dryer 10.

[0028] In this embodiment, the air inlet pipe 11 is connected to the liquefied tank 13 and the compression tank 19. The liquefied 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, Figure 1 As shown, the air inlet pipe 11 is connected to the upper end of the interior of the liquefied tank 13, and a cooling coil 14 is provided inside the liquefied tank 13. After the ammonia gas and water vapor in the air inlet pipe 11 enter the liquefied tank 13, they are liquefied into ammonia water by the cooling coil 14, and the ammonia water gathers at the bottom of the liquefied tank 13.

[0029] Specifically, Figure 1 and Figure 5 As shown, the compression box 19 is connected with the air inlet pipe 11 or the air inlet pipe 2 12 or the liquefied tank 13 through the air outlet pipe 17. The ammonia water and water vapor in the air inlet pipe 11 or the air inlet pipe 2 12 or the liquefied tank 13 enter the compression box 19 through the air outlet pipe 17. The air outlet pipe 17 is provided with a control valve 4 18. The control valve 4 18 controls the opening and closing of the air outlet pipe 17. Figure 5 As shown, a piston plate 21 is sealed and slidably installed in the compression box 19, and a push-pull device 20, a distance measuring device 22, and an air pressure detection device 23 are fixedly installed on the outer wall of the compression box 19. The push-pull device 20 is connected to the piston plate 21, and is used to push the piston plate 21 to slide and compress the ammonia and water vapor in the compression box 19. The distance measuring device 22 is used to measure the position of the piston plate 21, so that the controller controls the push-pull device 20 to move according to the detection data of the distance measuring device 22. The air pressure detection device 23 is used to detect the air pressure of the ammonia and water vapor in the compression box 19. When the ammonia and water vapor are compressed to the set value, the controller controls the push-pull device 20 to stop moving according to the detection data of the air pressure detection device 23.

[0030] In this embodiment, if Figure 1 As shown, the separation cylinder 8 is provided with an injection device 28, and the injection device 28 is connected with the liquefied tank 13 and the compression tank 19. Specifically, the lower end of the interior of the liquefied tank 13 is connected with the injection device 28 through the liquid outlet pipe 15, and the liquid outlet pipe 15 is provided with a control valve three 16. The ammonia water in the liquefied tank 13 flows into the injection device 28 through the liquid outlet pipe 15, and the control valve three 16 is used to control the on-off of the liquid outlet pipe 15. The compression tank 19 is connected with the injection device 28 through the air outlet pipe two 24, and the air outlet pipe two 24 is provided with a control valve five 25. The compressed ammonia gas and water vapor in the compression tank 19 enter the injection device 28 through the air outlet pipe two 24, and the control valve five 25 is used to control the on-off of the air outlet pipe two 24. The ammonia water in the liquefied tank 13, the compressed ammonia gas and water vapor in the compression tank 19 meet in the injection device 28 and are injected into the separation cylinder 8 in the form of droplets by the injection device 28. Specifically, as Figure 1-Figure 3 As shown, the injection 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 barrel 8, and the nozzle 282 is located in the separation barrel 8. The nozzle 282 is connected to the box body 281, and the air outlet pipe 24 and the liquid outlet pipe 15 are connected to the box body 281. The jetting direction of the air outlet pipe 24 is the same as the spraying direction of the nozzle 282, and the liquid outlet pipe 15 is perpendicular to the jetting direction of the air outlet pipe 24. With this design, after the ammonia water in the liquefied tank 13 and 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 barrel 8 in the form of droplets through the nozzle 282, forming ammonia water spray droplets. The ammonia water spray droplets are dispersed by the compressed ammonia gas and water vapor under their own weight. Under the action of the air inlet pipe 11, the ammonia gas and water vapor with a certain temperature injected into the separation cylinder 8 rise in the separation cylinder 8 and contact and mix with the ammonia spray droplets. The ammonia 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, the monohydrated ammonia in the droplets boils, and ammonia bubbles escape from the droplets, thereby reducing the ammonia solubility of the droplets. The ammonia gas rises in the separation cylinder 8 and then enters the dryer 10 for drying to obtain dry ammonia for other uses. The ammonia gas and water vapor at 38°C-70°C can only evaporate a small amount of water in the droplets, and most of the droplets continue to fall, and finally converge at the bottom of the separation cylinder 8 to form an aqueous solution. The ammonia concentration in the aqueous solution is relatively small, and the amount of acid consumed for the preparation of molybdenum solution is small.

[0031] In the present embodiment, a device for preparing molybdenum dissolving liquid using recycled ammonia water is used, which atomizes ammonia water to form an ammonia water spray, and then heats the ammonia water spray to make ammonia gas dissolved in the ammonia water droplets escape and separate from the droplets. The droplets fall and gather together to form an aqueous solution with a very low ammonia water concentration. Finally, the aqueous solution with a very low ammonia water concentration is used to prepare the molybdenum dissolving liquid. Compared with directly using recycled ammonia water to prepare the molybdenum dissolving liquid, this method can reduce the acid used to neutralize the ammonia water and reduce the cost of acid used to prepare the molybdenum dissolving liquid. At the same time, the ammonia gas and water vapor with a certain temperature generated by the company's existing production line are used to heat the ammonia water spray, and the thermal energy contained in the ammonia gas and water vapor is fully utilized. There is no 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 dissolving liquid.

[0032] In this embodiment, there are multiple compression boxes 19, and they are arranged in parallel with the outlet pipe 17 and the outlet pipe 24. In this design, when the compressed ammonia and water vapor in one compression box 19 are used up, the control valve 5 25 on the compression box 19 is immediately controlled to be closed, and the control valve 5 25 on the other compression box 19 is opened to continue to supply compressed ammonia and water vapor to the injection device 28. While the compression box 19 supplies compressed ammonia and water vapor to the injection device 28, the push-pull device 20 continues to push the piston plate 21 to slide to maintain the air pressure in the compression box 19 horizontally constant.

[0033] In this embodiment, when the compressed ammonia and water vapor in a compression box 19 are used up and the control valve 5 25 is closed, the control valve 4 18 on the compression box 19 is opened, and the push-pull device 20 is controlled to pull the piston plate 21 to reset, so that the ammonia and water vapor in the intake pipe 1 11 or the intake pipe 2 12 or the liquefied tank 13 enter the compression box 19. After a period of time, the control valve 4 18 is closed, and the push-pull device 20 is controlled to push the piston plate 21 to compress the ammonia and water vapor in the compression box 19 until the air pressure in the compression box 19 reaches the set value, and then wait for the compressed ammonia and water vapor in other compression boxes 19 to be used up. The set value can be freely set according to actual use requirements, as long as it is ensured that the ammonia and water vapor in the compression box 19 do not liquefy at the set value pressure, that is, when compressing the mixed gas of ammonia and water vapor, it is necessary to ensure that the partial pressure of both is lower than the saturated vapor pressure at the current temperature to avoid liquefaction. For example, when ammonia accounts for 90% and water vapor accounts for 10% of the mixed gas in the compression box 19, and the temperature in the compression box 19 is always maintained at 50°C, the saturated vapor pressure of ammonia is 20.33 Bar, the saturated vapor pressure of water vapor is 0.12 Bar, and the total pressure in the compression box 19, that is, the set value pressure X0.9≤ 20.33 Bar, and the set value pressure X0.1≤ 0.12 Bar. When the above two conditions are met at the same time, the set value pressure is ≤1.2Bar, that is, when ammonia accounts for 90% and water vapor accounts for 10% of the mixed gas in the compression box 19, and the temperature in the compression box 19 is always maintained at 50°C, the set value does not exceed 1.2Bar, otherwise the water vapor will liquefy first. The specific values ​​of the saturated vapor pressures of ammonia and water vapor at different temperatures are common knowledge and will not be repeated in this article. By changing the ratio of ammonia and water vapor in the mixed gas in the compression box 19 and the temperature in the compression box 19, the corresponding set value pressure will also change accordingly. In actual use, the ratio of ammonia and water vapor in the mixed gas and the temperature in the compression box 19 can be set according to the actual situation on site (during the compression of the mixed gas, the temperature in the compression box 19 remains unchanged).

[0034] In this embodiment, if Figure 1-Figure 3 As shown, the injection device 28 is located between the middle and the top of the separation cylinder 8, there are multiple injection devices 28, and they are distributed symmetrically on the separation cylinder 8; the air outlet pipe 24 is connected to the annular pipe 1 26, and the liquid outlet pipe 15 is connected to the annular pipe 29. The box body 281 of each injection device 28 is connected to the annular pipe 1 26 through the air inlet pipe 3 27, and the box body 281 of each injection device 28 is connected to the annular pipe 2 29 through the liquid inlet pipe 4 30. The jet direction of the air inlet pipe 3 27 is the same as the spray direction of the nozzle 282, and the liquid spray direction of the liquid inlet pipe 4 30 is perpendicular to the jet direction of the air inlet pipe 3 27, as shown in FIG. Figure 3 Indicated by the arrow.

[0035] Further, such as Figure 1-Figure 3 As shown, a partition 283 is provided in the box body 281, and the partition 283 divides the outlet of the air inlet pipe three 27 into two parts, an upper part and an lower part; the outlet end of the liquid inlet pipe four 30 is only connected with the liquid inlet pipe two 284 and the liquid inlet pipe three 285, the liquid inlet pipe two 284 is connected to the area below the partition 283 in the box body 281, and the liquid inlet pipe three 285 is connected to the area above the partition 283 in the box body 281, and the liquid inlet pipe two 284 and the liquid inlet pipe three 285 are connected to the area above the partition 283 in the box body 281, and the spray direction of the liquid inlet pipe two 284 and the liquid inlet pipe three 285 is perpendicular to the spray direction of the air inlet pipe three 27, and the partition 283 is used to divide the outlet of the air inlet pipe three 27 into two parts, and the liquid inlet pipe two 284 and the liquid inlet pipe three 285 are used to divide the aqueous solution in the liquid inlet pipe four 30 into two parts, and the design of sending them into the upper and lower areas of the partition 283 respectively further enhances the mixing uniformity of the aqueous solution and the compressed ammonia and water vapor, so that the droplets sprayed from the nozzle 282 are more uniform and the ammonia separation effect is better.

[0036] Furthermore, in this embodiment, if Figure 2-Figure 4 As shown, the air inlet pipe three 27 and the liquid inlet pipe four 30 are connected through the air inlet pipe four 31, and the air outlet end of the air inlet pipe four 31 is located in the liquid inlet pipe four 30, and the air outlet direction of the air inlet pipe four 31 is the same as the liquid flow direction in the liquid inlet pipe four 30; the air inlet pipe four 31 is provided with a control valve six 32, and the air outlet end of the air inlet pipe four 31 is provided with a plurality of air outlet holes 33 distributed in a circular array. In this design, compressed ammonia and water vapor are pre-mixed and heated with the aqueous solution in advance, which further improves the uniformity of mixing the aqueous solution and compressed ammonia and water vapor, increases the temperature of the droplets sprayed from the nozzle 282, makes the droplets sprayed from the nozzle 282 more uniform, and has a fast ammonia separation speed, high efficiency, and better separation effect.

[0037] In addition, the present invention also proposes a method for preparing a molybdenum solution by using recycled ammonia water, and the following steps are performed using any one of the above-mentioned devices for preparing a molybdenum solution by using recycled ammonia water: Ammonia gas and water vapor are injected into the liquefaction tank 13 and the compression tank 19 through the air inlet pipe 11, and the ammonia gas and water vapor are liquefied into ammonia water by the liquefaction tank 13. The liquefied ammonia water is gathered at the bottom of the liquefaction tank 13, and the ammonia gas and water vapor are compressed by the compression tank 19; The ammonia water in the liquefaction tank 13 and the compressed ammonia gas and water vapor in the compression tank 19 are injected into the injection device 28, and ammonia water droplets are sprayed into the separation cylinder 8 through the injection device 28, and ammonia gas and water vapor are injected into the separation cylinder 8 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 8 and gathers into a water solution, and the ammonia gas rises and enters the dryer 10 for drying; The aqueous solution is injected into the preparation box 1 to prepare the molybdenum solution.

[0038] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are 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 arranged 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, they are 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 be configured with a molybdenum solution. The dryer is used to dry the ammonia gas.

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 2, characterized in that: The air inlet pipe 1 is connected to the upper end of the liquefied tank, and the lower end of the liquefied tank is connected to the injection device through the liquid outlet pipe, and the liquid outlet pipe is provided with a control valve 3; A cooling coil is arranged inside the liquefaction tank.

4. A device for preparing a molybdenum solution by recycling ammonia water as claimed in claim 3, characterized in that: The compression box is connected with the air inlet pipe 1 or the air inlet pipe 2 or the liquefied tank through the air outlet pipe 1, and the air outlet pipe 1 is provided with a control valve 4; The compression box is connected to the injection device through an air outlet pipe 2, and a control valve 5 is provided on the air outlet pipe 2; 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 4, characterized in that: The injection device includes 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 injection direction of the second air outlet pipe is the same as the spray direction of the nozzle. The liquid injection direction of the liquid outlet pipe is perpendicular to the injection direction of the second air outlet pipe.

6. The device for preparing a molybdenum solution by recycling ammonia water as claimed in claim 5, characterized in that: There are multiple injection devices, which are centrally and symmetrically distributed on the separation cylinder; 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 injection device is connected to the annular pipe 1 through the air inlet pipe 3, and the box body of each injection 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.

7. The device for preparing a molybdenum solution by recycling ammonia water as claimed in claim 6, characterized in that: A partition is provided in the box body, and the partition divides the outlet of the air inlet pipe 3 into two parts, an upper part and a lower part; The outlet end of the liquid inlet pipe four is only connected to the liquid inlet pipe two and the liquid inlet pipe three. The liquid inlet pipe two is connected to the area below the partition in the box body, and the liquid inlet pipe three is connected to the area above the partition in the box body. 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.

8. The device for preparing a molybdenum solution by recycling ammonia water as claimed in claim 6, 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.

9. A method for preparing a molybdenum solution using recycled ammonia water, characterized in that: The following steps are performed using the device for preparing molybdenum solution by recycling ammonia water as described in any one of claims 1 to 8: 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.

10. A method for preparing a molybdenum solution by recycling ammonia water as claimed in claim 9, 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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