Low-energy-consumption and high-efficiency silver nitrate cooling crystallization system

Abstract

The invention relates to the technical field of silver nitrate crystallization, in particular to a low-energy-consumption and high-efficiency silver nitrate cooling crystallization system which comprises a crystallization module, a temperature control module and a material receiving module, the crystallization module comprises a tank body, a first crystallization area is arranged on the upper portion of the tank body, and a second crystallization area is arranged on the lower portion of the tank body; liquid flow channels are arranged on the inner side wall of the first crystallization area, a distributing device is arranged above the liquid flow channels, silver nitrate mother liquor is fed into the liquid flow channels after being shunted through the distributing device, the mother liquor is prevented from completely falling into the tank body, and the mother liquor is cooled after being differentiated in the first crystallization area through drainage of the liquid flow channels, so that the silver nitrate mother liquor is purified. The cooling efficiency can be remarkably improved, the mother liquor falls into the second crystallization area after being rapidly cooled, and compared with a traditional mode that the mother liquor is directly put into the tank body to be cooled, the mother liquor can be rapidly cooled in a staged cooling mode, the cooling efficiency is improved, the time needed by cooling is shortened, the cooling capacity needed by cooling is reduced, and then the crystallization efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of silver nitrate crystallization, and in particular to a low-energy-consumption and high-efficiency silver nitrate cooling crystallization system. Background Art

[0002] As an important inorganic compound, silver nitrate is widely used in photographic emulsion, silver plating, mirror making, printing, medicine, electronics industry and other fields. The cooling crystallization process in its production process is a key step in preparing high-quality silver nitrate crystals. However, the traditional silver nitrate cooling crystallization system often has problems such as high energy consumption and low cold utilization efficiency. This is mainly due to the direct delivery of high-temperature silver nitrate mother liquor into the crystallization tank, and then the cooling operation is carried out by laying heat exchange pipes on the outside of the crystallization tank, resulting in large consumption of cold source and no obvious cooling effect on the mother liquor in the middle of the tank body. The side wall temperature drops quickly while the temperature in the middle of the tank drops slowly. This not only has a low utilization efficiency of the cold source, but also the slow temperature drop in the middle will directly lead to a slow crystallization process, which directly affects the production efficiency of the product.

[0003] In the existing silver nitrate cooling crystallization technology, the direct cooling method is usually used, that is, the high-temperature silver nitrate mother liquor is directly injected into the crystallization tank, and the tank body is cooled by an external cooling device. Although this method is simple and direct, it has obvious defects: first, the cooling speed is difficult to control, which can easily lead to local overcooling or overheating, affecting the quality of the crystal; second, the cold utilization efficiency is low, and a large amount of cold is lost during the transmission process, increasing energy consumption costs; third, the waste gas, waste liquid and other pollutants generated during the cooling process are difficult to handle, increasing environmental pressure.

[0004] For example, a Chinese patent (application number: 202121259735.8) provides a silver nitrate crystallization device, including a tank body, a lifting device, a scraper and a water-cooling jacket, wherein the lifting device is installed on the top of the tank body, and is connected to a plurality of scrapers at the bottom, the scrapers are located inside the tank body, and the water-cooling jacket is installed on the outside of the tank body. The upper part of the tank body is provided with a feed inlet and an air outlet, and the bottom is provided with a discharge port. The silver nitrate crystallization device improves the fluidity of the solution by the up and down movement of the scraper, and at the same time, the scraper scrapes the inner wall to reduce the adhesion rate of silver nitrate crystals on the inner wall of the kettle, thereby increasing the output of silver nitrate crystals, making the crystallization effect better and more efficient. However, the device still adopts a structure for external heat exchange during cooling, so it cannot improve the utilization rate of the cold source, and there are still problems of high energy consumption and low crystallization efficiency during use.

[0005] In order to overcome the above technical defects and improve the energy efficiency and environmental performance of the silver nitrate cooling crystallization system, a low-energy and high-efficiency silver nitrate cooling crystallization system is urgently needed. Summary of the invention

[0006] In order to solve the above problems, an embodiment of the present invention provides a low-energy consumption and high-efficiency silver nitrate cooling crystallization system, which solves the problems of low efficiency and high consumption of cold energy in the cooling crystallization of silver nitrate proposed in the background technology, has the effect of improving cooling efficiency and reducing energy consumption, and can also realize continuous cycle operation.

[0007] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a low-energy consumption and high-efficiency silver nitrate cooling crystallization system, including a crystallization module, a temperature control module and a material receiving module, the crystallization module includes a tank body, a first crystallization zone is arranged on the upper part of the tank body, and a second crystallization zone is arranged on the lower part of the tank body, a liquid flow channel is arranged on the inner side wall of the first crystallization zone, a distributor is arranged above the liquid flow channel, and a cleaning device used in conjunction with the liquid flow channel is arranged in the middle of the first crystallization zone, the temperature control module includes a protective shell arranged outside the tank body, an interlayer is reserved between the protective shell and the tank body, a heat exchange tube group located outside the first crystallization zone and the second crystallization zone is arranged in the interlayer, the material receiving module includes a material receiving tank, the upper part of the material receiving tank is connected to the bottom of the tank body, and the lower part is provided with a circulation pipeline connected to the distributor.

[0008] As a further improvement of the above technical solution:

[0009] The cleaning device comprises a lifting bracket, the end of which is provided with a cleaning plate corresponding to the position of the liquid flow channel, and a lifting driving source is provided above the tank body.

[0010] The lifting bracket includes a vertically mounted mounting sleeve, a guide tube is arranged on the side wall of the mounting sleeve, a telescopic rod connected to the cleaning plate is slidably arranged in the guide tube, an ejection mechanism for controlling the extension and retraction of the telescopic rod is arranged in the mounting sleeve, and a reset device is arranged in the middle of the guide tube.

[0011] The ejection mechanism comprises a transmission rod connected to a lifting drive source, and an ejection block abutting against the end of the telescopic rod is arranged in the middle of the transmission rod.

[0012] A storage sleeve corresponding to the position of the ejection block is arranged in the middle of the installation sleeve, and the upper and lower ends of the storage sleeve form a limiting boss with the installation sleeve for limiting the lifting distance of the ejection block.

[0013] The end of the guide tube is provided with a limit plate abutting against the inner wall of the tank body, the side wall of the guide tube is provided with a storage groove for installing the limit plate, and a recovery mechanism linked with the telescopic rod is provided in the storage groove.

[0014] The distributor comprises a feed pipe, and a discharge end of the feed pipe extends to a branch pipe above the liquid flow channel.

[0015] There are multiple liquid flow channels which are evenly distributed along the inner wall of the tank body, and the upper part of each liquid flow channel is provided with a material receiving trough connected to the branch pipe.

[0016] A delivery pump is arranged between the material receiving tank and the tank body, a filtering device is arranged in the material receiving tank, a liquid discharge port for connecting to a circulation pipeline is arranged at the bottom of the material receiving tank, and a circulation pump for delivering mother liquor is arranged on the circulation pipeline.

[0017] The filter device comprises a filter screen cover, and a sealing ring plate corresponding to the position of the liquid discharge port is arranged at the bottom of the filter screen cover.

[0018] The beneficial effects of the embodiments of the present invention are as follows: 1. The low-energy consumption and high-efficiency silver nitrate cooling crystallization system comprises a crystallization module, a temperature control module and a material receiving module. The crystallization module comprises a tank body, a first crystallization zone is arranged on the upper part of the tank body, and a second crystallization zone is arranged on the lower part. A liquid flow channel is arranged on the inner side wall of the first crystallization zone, and a distributor is arranged above the liquid flow channel. The silver nitrate mother liquor is diverted by the distributor and then put into each liquid flow channel to prevent all the mother liquor from falling into the tank body. The mother liquor is differentiated in the first crystallization zone through drainage through the liquid flow channel and then cooled, which can significantly improve the cooling efficiency. The mother liquor is quickly cooled and then falls into the second crystallization zone. Compared with the traditional method of directly putting the mother liquor into the tank body for cooling, the mother liquor can be quickly cooled by graded cooling, thereby improving the cooling efficiency, reducing the cooling time and cooling amount required, and thus achieving the purpose of improving the crystallization efficiency.

[0019] 2. A cleaning device is designed in the tank body, which can be used to scrape off the crystals produced by the mother liquid in the liquid flow channel and then enter and exit the second crystallization area. By adding this crystal, the mother liquid in the second crystallization area can be further promoted to crystallize. The mother liquid can be quickly cooled by step cooling, and the whole process does not require stirring, which reduces energy consumption. At the same time, it simplifies the equipment structure, eliminates the traditional stirring components, and saves the manpower and material resources required for its installation and maintenance operations.

[0020] 3. The lifting bracket includes a vertically installed mounting sleeve, a guide tube is provided on the side wall of the mounting sleeve, a telescopic rod connected to the cleaning plate is slidably installed in the guide tube, an ejection mechanism for controlling the extension and retraction of the telescopic rod is provided in the mounting sleeve, a reset device is provided in the middle of the guide tube, the reset device includes a baffle installed on the telescopic rod, an active chamber for the baffle to slide is opened on the inner wall of the guide tube, a reset spring mounted on the telescopic rod is provided on the side of the baffle facing the cleaning plate, and the reset device can be used to recycle the cleaning plate after the cleaning operation is completed, to ensure that there is a gap between the cleaning plate and the liquid flow channel when not in operation, to prevent the cleaning plate from blocking the mother liquid from sliding down when not in operation.

[0021] 4. A material receiving tank is also connected to the outside of the tank body. The material receiving tank 9 recovers the mixture of mother liquor and crystals. After recovery, the mother liquor is transported to the tank body 1 again through the circulation pipeline 10 for secondary crystallization operation. The circulation of the mother liquor replaces the stirring operation and realizes continuous operation. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 is a cross-sectional view of the present invention;

[0024] Figure 3 It is a structural schematic diagram of the liquid flow channel in the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the cleaning device in the present invention;

[0026] Figure 5 A top view of the cleaning device of the present invention;

[0027] Figure 6 is a cross-sectional view of the cleaning device of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the recovery mechanism in the present invention;

[0029] Figure 8 It is a structural schematic diagram of the telescopic base in the present invention;

[0030] Fig. 9 It is a schematic structural diagram of the distributor in the present invention.

[0031] In the figure: 1, tank body; 2, first crystallization zone; 3, second crystallization zone; 4, liquid flow channel; 5, distributor; 6, protective shell; 7, interlayer; 8, heat exchange tube group; 9, receiving tank; 10, circulation pipeline; 11, lifting bracket; 12, cleaning plate; 13, installation sleeve; 14, guide tube; 15, telescopic rod; 16, driving source; 17, transmission rod; 18, ejector block; 19, storage sleeve; 20, limiting boss; 21, limiting plate; 22, storage tank; 23, feeding pipeline; 24, distribution Flow branch pipe; 25, material receiving trough; 26, delivery pump; 27, discharge port; 28, circulation pump; 29, filter screen; 30, sealing ring plate; 31, baffle; 32, movable chamber; 33, reset spring; 34, adapter sleeve; 35, guide ridge; 36, guide seat; 37, guide groove; 38, buffer spring; 39, avoidance chamber; 40, telescopic base; 41, retractable plate; 42, extension rod; 43, compression spring; 44, slider; 45, slide groove; 46, top cover; 47, clamping ring. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0033] Example 1

[0034] like Figure 1-9As shown, the low-energy consumption and high-efficiency silver nitrate cooling crystallization system of the present embodiment includes a crystallization module, a temperature control module and a material receiving module. The crystallization module includes a tank body 1. The upper part of the tank body 1 is provided with a first crystallization area 2, and the lower part is provided with a second crystallization area 3. A liquid flow channel 4 is opened on the inner side wall of the first crystallization area 2, and a distributor 5 is provided above the liquid flow channel 4. The silver nitrate mother liquor is transported to each liquid flow channel 4 through the distributor 5. Compared with the existing method of directly transporting the mother liquor to the crystallization tank, the design of the liquid flow channel 4 can divert the mother liquor entering the tank body 1. After the mother liquor is diverted, the thickness of the mother liquor in the liquid flow channel 4 will be greatly reduced, so that the mother liquor can be quickly cooled in the first crystallization area 2. The middle part of the first crystallization area 2 is provided with a liquid flow channel 4 that cooperates with the liquid flow channel 4. A cleaning device is used. When the mother liquid falls in the liquid flow channel 4, a part of crystals will appear due to the decrease in temperature. At this time, the cleaning device is used to scrape off the crystals adhering to the surface of the liquid flow channel 4 to keep the surface of the liquid flow channel 4 smooth. At the same time, the crystals falling into the second crystallization zone 3 can promote the mother liquid at the bottom of the tank body 1 to complete the crystallization. The temperature control module includes a protective shell 6 coated on the outside of the tank body 1, and an interlayer 7 is reserved between the protective shell 6 and the tank body 1. A heat exchange tube group 8 located outside the first crystallization zone 2 and the second crystallization zone 3 is provided in the interlayer 7. The heat exchange tube group 8 is spirally distributed and the inlet is located at the lower part of the tank body 1, and the outlet is located at the upper part. The material receiving module includes a material receiving tank 9. The upper part of the material receiving tank 9 is connected to the bottom of the tank body 1. The material receiving tank 9 A circulation pipe 10 connected to the distributor 5 is provided at the lower part. When the height of the mother liquor in the tank body 1 reaches the top of the second crystallization zone 3, the mixture of the crystals and the mother liquor is transported to the receiving tank 9. After the solid-liquid separation is completed in the receiving tank 9, the remaining mother liquor is transported back to the distributor 5 through the circulation pipe 10 for a new round of cooling crystallization treatment. Through the design of the first crystallization zone 2 and the second crystallization zone 3, the mother liquor can be processed step by step when entering the tank body 1. The cooling operation of the mother liquor entering the tank body 1 can be quickly completed through the first crystallization zone 2, and the cooled mother liquor is then diverted to the second crystallization zone 3 for cooling crystallization. At the same time, the cleaning device can be used to scrape off the crystals generated by the liquid flow channel 4 when the mother liquor passes through, and then enter and exit the second crystallization zone. In the crystal zone 3, the addition of crystals in this way can further promote the crystallization of the mother liquor in the second crystal zone 3. Compared with the existing method of directly delivering the mother liquor to the crystallization tank for cooling and crystallization, the mother liquor can be quickly cooled down by step-by-step cooling, and the whole process does not require stirring, which reduces energy consumption. At the same time, the crystals in the first crystal zone 2 can enter the second crystal zone 3 to accelerate the entire crystallization process. In the second crystal zone 3, the mixture of mother liquor and crystals can be recovered through the collecting tank 9. After recovery, the mother liquor is transported to the tank body 1 again through the circulation pipeline 10 for secondary crystallization operation. At the same time, the circulation of the mother liquor can replace stirring to achieve continuous operation of silver nitrate crystallization.

[0035] The cleaning device includes a lifting bracket 11, and a cleaning plate 12 corresponding to the position of the liquid flow channel 4 is provided at the end of the lifting bracket 11. A lifting drive source 16 is provided above the tank body 1. The lifting drive source 16 adopts a telescopic cylinder, which is used to drive the longitudinal displacement of the lifting bracket 11. During the lifting process, the cleaning plate 12 is used to remove the crystals on the liquid flow channel 4.

[0036] The lifting bracket 11 includes a vertically installed mounting sleeve 13, a guide tube 14 is provided on the side wall of the mounting sleeve 13, a telescopic rod 15 connected to the cleaning plate 12 is slidably installed in the guide tube 14, an ejection mechanism for controlling the extension and retraction of the telescopic rod 15 is provided in the mounting sleeve 13, a reset device is provided in the middle of the guide tube 14, the reset device includes a baffle 31 installed on the telescopic rod 15, an active chamber 32 for the baffle 31 to slide is provided on the inner side wall of the guide tube 14, a reset spring 33 mounted on the telescopic rod 15 is provided on the side of the baffle 31 facing the cleaning plate 12, and the reset device can be used to recycle the cleaning plate 12 after the cleaning operation is completed, to ensure that there is a gap between the cleaning plate 12 and the liquid flow channel 4 when not in operation, so as to prevent the cleaning plate 12 from blocking the mother liquid from sliding down when not in operation.

[0037] The ejection mechanism includes a transmission rod 17 connected to the lifting drive source 16. The transmission rod 17 is inserted into the mounting sleeve 13 and slides along the height direction of the mounting sleeve 13. An ejection block 18 is provided in the middle of the transmission rod 17 to abut the end of the telescopic rod 15. The ejection block 18 is truncated cone-shaped and its diameter gradually decreases from top to bottom. As the transmission rod 17 sinks, the ejection block 18 will eject the telescopic rod 15 outward. At this time, the cleaning plate 12 extends outward and fits with the surface of the liquid flow channel 4, and can complete the scraping operation as the transmission rod 17 continues to descend.

[0038] A storage sleeve 19 corresponding to the position of the ejection block 18 is provided in the middle of the mounting sleeve 13. The diameter of the storage sleeve 19 is larger than the diameter of the mounting sleeve 13. The upper and lower ends of the storage sleeve 19 form a limiting boss 20 with the mounting sleeve 13 for limiting the lifting distance of the ejection block 18. The height of the storage sleeve 19 is greater than the height of the ejection block 18, providing space for the first stage of lifting and lowering of the ejection block 18. In the first moving stage of the ejection block 18, it is used for the extension and retraction of the cleaning plate 12. At this time, the height of the entire lifting bracket 11 remains stationary. When the ejection block 18 moves in the storage sleeve 19 to contact the lower limiting boss 20, the transmission rod 17 continues to descend, which will drive the lifting bracket 11 descends, and the cleaning plate 12 will scrape the crystals in the liquid flow channel 4. When it runs to the lowermost end of the liquid flow channel 4, the cleaning operation is completed. At this time, the transmission rod 17 begins to lift upward, and the ejector block 18 first moves upward to cancel the limit on the telescopic rod 15. At this time, the telescopic rod 15 is reset and moved under the action of the reset spring 33, driving the cleaning plate 12 to retract inward. During the retraction process, the bottom platform of the liquid flow channel 4 is cleaned to prevent crystals from accumulating at the bottom of the liquid flow channel 4. After the cleaning plate 12 is retracted, the ejector block 18 continues to rise and contacts with the upper limit boss 20, driving the mounting sleeve 13 to move upward, so that the lifting bracket 11 is reset to the initial position.

[0039] A transfer sleeve 34 is provided at the connection between the lower part of the storage sleeve 19 and the installation sleeve 13, and a guide ridge 35 is provided on the inner side wall of the transfer sleeve 34. A guide seat 36 is provided at the lower part of the ejection block 18, and a guide groove 37 used in conjunction with the guide ridge 35 is provided on the side wall of the guide seat 36 to prevent the transmission rod 17 from rotating during the lifting process, thereby playing a positioning and guiding role. A buffer spring 38 is provided in the transfer sleeve 34, and a avoidance chamber 39 for placing the buffer spring 38 is provided on the lower surface of the guide seat 36. The upper end of the buffer spring 38 is located in the avoidance chamber 39. The design of the buffer spring 38 can provide a travel avoidance when the ejection block 18 is pressed down, and can apply an upward thrust to the ejection block 18 when the ejection block 18 rises, so as to facilitate the bottom of the ejection block 18 to be separated from the storage sleeve 19 and lifted upward.

[0040] The end of the guide tube 14 is provided with a limit plate 21 abutting against the inner side wall of the tank body 1, and a storage groove 22 for installing the limit plate 21 is provided on the side wall of the guide tube 14. A recovery mechanism linked to the telescopic rod 15 is provided in the storage groove 22. The recovery mechanism includes a telescopic base 40, one end of the telescopic base 40 is slidably connected to the telescopic rod 15, and a slider 44 is provided at the end of the telescopic base 40. A slide groove 45 is provided on the side wall of the telescopic rod 15. The slide groove 45 is designed along the telescopic direction of the telescopic rod 15 and has a depth of The degree of extension gradually increases from one end toward the installation sleeve 13, ensuring that as the telescopic rod 15 extends outward, the telescopic base 40 can be moved toward the telescopic rod 15, thereby driving the limit plate 21 to retract inward. At the same time, the slide groove 45 and the slider 44 can also prevent the telescopic rod 15 from rotating, ensuring the stability of the telescopic movement. The other end is provided with a retractable plate 41 located in the storage groove 22. The upper surface of the retractable plate 41 is an inclined surface and the thickness extends inward from one end close to the limit plate 21. The extension gradually increases, and one end of the limit plate 21 located in the storage groove 22 is provided with an extension rod 42 that abuts against the retracting plate 41, and a partition is provided on the extension rod 42, and a compression spring 43 is provided on the side of the partition away from the retracting plate 41. The function of the limit plate 21 is to increase the positioning of the upper lifting bracket 11 and the side wall of the tank body 1, to ensure that the lifting bracket 11 remains stationary when the ejection block 18 is in the first stage of displacement in the storage sleeve 19. Through the design of the recovery mechanism, when the cleaning plate 12 is extended, the telescopic base 40 can be driven to move toward the telescopic rod 15. At this time, the thinner end of the retracting plate 41 contacts the extension rod 42, and the extension rod 42 will move inward under the action of the compression spring 43, thereby driving the limit plate 21 to retract in the box, canceling the limitation on the lifting bracket 11, so that it can move downward with the lifting bracket 11. The number of limit plates 21 is two, and they are respectively located on both sides of the cleaning plate 12, so that the corners at the bottom of the liquid flow channel 4 can be scraped as the lifting bracket 11 falls, thereby improving the cleaning effect.

[0041] The distributor 5 includes a feed pipe 23, the discharge end of the feed pipe 23 extends to the diversion branch 24 above the liquid flow channel 4. The mother liquor can be diverted in the first crystallization zone 2 through the distributor 5, so that it can complete the heat exchange operation in the liquid flow channel 4, and can achieve rapid cooling of the mother liquor. Compared with the method of directly cooling the crystallization tank by feeding the mother liquor, less energy is consumed and the cooling efficiency is also higher.

[0042] There are multiple liquid flow channels 4 that are evenly distributed along the inner wall of the tank body 1. The upper part of each liquid flow channel 4 is provided with a receiving trough 25 connected to the branch pipe 24 for introducing the mother liquid into the liquid flow channel 4. The opening width of the receiving trough 25 gradually decreases from top to bottom and the lower end is connected to the upper end of the liquid flow channel 4.

[0043] A delivery pump 26 is provided between the material receiving tank 9 and the tank body 1 for delivering the mixture of the mother liquor and the crystals in the second crystallization zone 3. A filtering device is provided in the material receiving tank 9 for performing solid-liquid separation of the crystals and the mother liquor. A discharge port 27 for connecting the circulation pipe 10 is provided at the bottom of the material receiving tank 9. A circulation pump 28 for delivering the mother liquor is provided on the circulation pipe 10. After solid-liquid separation by the filtering device, the mother liquor can be discharged through the discharge port 27 and then delivered to the feed end of the tank body 1 by the circulation pump 28, and crystallized again through the distributor 5. The mother liquor and the crystals can be recovered through the material receiving tank 9, and the mother liquor can be continuously circulated for a second time to ensure the continuous operation of the cooling crystallization system.

[0044] The filtering device includes a filter screen cover 29, a removable top cover 46 is provided on the top of the material collecting tank 9, a clamping ring 47 abutting against the top of the filter screen cover 29 is provided on the lower surface of the top cover 46, and a sealing ring plate 30 corresponding to the position of the drain port 27 is provided at the bottom of the filter screen cover 29, and the sealing ring plate 30 can seal the connection between the filter screen cover 29 and the drain port 27 to avoid leakage.

[0045] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0048] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A low-energy consumption and high-efficiency silver nitrate cooling crystallization system, comprising a crystallization module, a temperature control module and a material receiving module, characterized in that: The crystallization module comprises a tank body (1), a first crystallization zone (2) is arranged at the upper part of the tank body (1), a second crystallization zone (3) is arranged at the lower part, a liquid flow channel (4) is arranged on the inner side wall of the first crystallization zone (2), a distributor (5) is arranged above the liquid flow channel (4), and a cleaning device used in conjunction with the liquid flow channel (4) is arranged in the middle of the first crystallization zone (2); The temperature control module comprises a protective shell (6) arranged outside the tank body (1), an interlayer (7) is reserved between the protective shell (6) and the tank body (1), and a heat exchange tube group (8) located outside the first crystallization zone (2) and the second crystallization zone (3) is arranged in the interlayer (7); The material receiving module comprises a material receiving tank (9), the upper part of which is connected to the bottom of the tank body (1), and the lower part of which is provided with a circulation pipeline (10) connected to the distributor (5).

2. The low energy consumption and high efficiency silver nitrate cooling crystallization system according to claim 1, characterized in that: The cleaning device comprises a lifting bracket (11), the end of the lifting bracket (11) is provided with a cleaning plate (12) corresponding to the position of the liquid flow channel (4), and a lifting drive source (16) is provided above the tank body (1).

3. The low energy consumption and high efficiency silver nitrate cooling crystallization system according to claim 2 is characterized in that: The lifting bracket (11) comprises a vertically mounted mounting sleeve (13), a guide tube (14) is arranged on the side wall of the mounting sleeve (13), a telescopic rod (15) connected to the cleaning plate (12) is slidably arranged in the guide tube (14), an ejection mechanism for controlling the telescopic rod (15) to be extended and retracted is arranged in the mounting sleeve (13), and a reset device is arranged in the middle of the guide tube (14).

4. The low energy consumption and high efficiency silver nitrate cooling crystallization system according to claim 3 is characterized in that: The ejection mechanism comprises a transmission rod (17) connected to a lifting drive source (16); an ejection block (18) abutting against an end of a telescopic rod (15) is provided in the middle of the transmission rod (17).

5. The low energy consumption and high efficiency silver nitrate cooling crystallization system according to claim 4 is characterized in that: A storage sleeve (19) corresponding to the position of the ejection block (18) is arranged in the middle of the installation sleeve (13), and the upper and lower ends of the storage sleeve (19) form a limiting boss (20) with the installation sleeve (13) for limiting the lifting distance of the ejection block (18).

6. The low energy consumption and high efficiency silver nitrate cooling crystallization system according to claim 3 is characterized in that: The end of the guide tube (14) is provided with a limit plate (21) that abuts against the inner wall of the tank body (1), and the side wall of the guide tube (14) is provided with a storage groove (22) for installing the limit plate (21), and a recovery mechanism linked to the telescopic rod (15) is provided in the storage groove (22).

7. The low energy consumption and high efficiency silver nitrate cooling crystallization system according to claim 1 is characterized in that: The distributor (5) comprises a feed pipe (23), and the discharge end of the feed pipe (23) extends to a branch pipe (24) above the liquid flow channel (4).

8. The low energy consumption and high efficiency silver nitrate cooling crystallization system according to claim 7 is characterized in that: The liquid flow channels (4) are multiple in number and are evenly distributed along the inner wall of the tank body (1), and the upper part of each liquid flow channel (4) is provided with a material receiving trough (25) connected to the branch pipe (24).

9. The low energy consumption and high efficiency silver nitrate cooling crystallization system according to claim 1 is characterized in that: A delivery pump (26) is provided between the material receiving tank (9) and the tank body (1), a filtering device is provided in the material receiving tank (9), a liquid discharge port (27) for connecting to a circulation pipeline (10) is provided at the bottom of the material receiving tank (9), and a circulation pump (28) for delivering mother liquid is provided on the circulation pipeline (10).

10. The low energy consumption and high efficiency silver nitrate cooling crystallization system according to claim 9, characterized in that: The filtering device comprises a filtering screen cover (29), and a sealing ring plate (30) corresponding to the position of the liquid discharge port (27) is arranged at the bottom of the filtering screen cover (29).

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