Desalting processing equipment and processing technology applied to novel dried fruits

Abstract

The invention relates to the field of food processing, in particular to desalting processing equipment and a processing technology of novel dried fruits. The desalting processing equipment comprises a cleaning cylinder, a water tank shell is installed on the upper portion of the outer surface of the cleaning cylinder, an overflow pipe staggered with the water tank shell is installed on the upper portion of the outer surface of the cleaning cylinder, and a water inlet pipe is installed at the water inlet end of a circulating pump; the water outlet end of the circulating pump is provided with a water conveying pipe, the upper end of the water conveying pipe is provided with a third butterfly valve, the end, away from the third butterfly valve, of the water outlet pipe extends to the upper portion in the water tank shell, the water inlet end of the ultrafiltration membrane filter is provided with a fourth butterfly valve, and the temporary storage cylinder is installed at the end, away from the cleaning cylinder, of the overflow pipe. The low-efficiency mode of discharging after one-time flushing in the traditional process is thoroughly changed, and the water consumption is reduced from the source.

Description

Technical Field

[0001] This invention relates to the field of food processing, specifically to a desalination processing equipment, and also to a novel processing technology for dried fruit. Background Technology

[0002] Desalting is a core step in flavor blending of salted dried fruits (such as salted bayberries and dried olives). Its main objective is to precisely remove excess salt while preserving the original texture and nutrients of the dried fruit, achieving a balance between its sweet and sour flavor and a moderately salty aroma. Washing to remove surface salt is a widely used basic process—rinsing the surface of the dried fruit with clean water effectively removes adhering free salt particles, preventing the high concentration of salt on the surface from seeping back into the dried fruit during desalting and causing it to become increasingly salty.

[0003] This method of rinsing directly with clean water has significant resource and environmental drawbacks. To thoroughly remove surface salt particles, a continuous supply of large amounts of water is often required. The water carries the salt away after only brief contact with the dried fruit surface, rendering the water useless after a single use and causing serious waste. More importantly, if this salt-laden washing wastewater is discharged directly, it will alter the osmotic pressure balance of surrounding water bodies, posing potential harm to soil and vegetation. Long-term accumulation may exacerbate the environmental burden, contradicting the green and environmentally friendly principles of food processing.

[0004] Furthermore, simple rinsing with water only works on the surface of the dried fruit, and it is difficult to reach the salt that has penetrated into the skin texture or shallow tissues. Subsequent processes such as soaking are still needed for deeper desalination. The large amount of wastewater generated in the initial rinsing also increases the cost and difficulty of wastewater treatment. This dual problem of inefficient water consumption and pollution risk has gradually revealed the limitations of traditional washing and desalination processes in large-scale production. Summary of the Invention

[0005] To address the aforementioned issues, a desalination processing device is provided to solve the problem that traditional washing and desalination processes are gradually showing limitations in adaptability during large-scale production.

[0006] To address the problems of existing technologies, the present invention provides a desalination processing device, comprising:

[0007] The cleaning cylinder has an open top. A second butterfly valve is installed on the outer surface of the lower end of the cleaning cylinder. A water tank shell is installed on the upper part of the outer surface of the cleaning cylinder. The upper end of the water tank shell is open. A communication port is opened in the area of ​​the cleaning cylinder covered by the water tank shell. An overflow pipe is installed on the upper part of the outer surface of the cleaning cylinder, which is offset from the water tank shell.

[0008] A circulating pump has an inlet pipe installed at its inlet end. The end of the inlet pipe away from the circulating pump is connected to a second butterfly valve. A water delivery pipe is installed at the outlet end of the circulating pump. The water delivery pipe is arranged vertically. A third butterfly valve is installed at the upper end of the water delivery pipe. An outlet pipe is installed at the upper end of the third butterfly valve. The end of the outlet pipe away from the third butterfly valve extends to the upper part of the water tank shell.

[0009] An ultrafiltration membrane filter has a fourth butterfly valve installed at its inlet end. A branch pipe is installed at the end of the fourth butterfly valve away from the ultrafiltration membrane filter. The end of the branch pipe away from the fourth butterfly valve is connected to a water supply pipe. A connecting pipe is installed at the outlet end of the ultrafiltration membrane filter.

[0010] A temporary storage cylinder is installed at the end of the overflow pipe away from the cleaning cylinder, and the temporary storage cylinder is connected to the connecting pipe and the overflow pipe.

[0011] Specifically, a bent tube is installed at the middle of the outer surface of the temporary storage cylinder. The upper end of the bent tube is higher than the upper end of the temporary storage cylinder. The upper end of the bent tube is connected to the end of the connecting tube away from the ultrafiltration membrane filter.

[0012] Specifically, a first pipe joint is installed at the middle of the outer surface of the temporary storage cylinder. The first pipe joint is connected to the overflow pipe through a structure formed by a flange and bolts. A second pipe joint is installed on the outer surface of the temporary storage cylinder away from the first pipe joint. The height of the second pipe joint is the same as the height of the first pipe joint. The end of the bend away from the connecting pipe is connected to the second pipe joint through a structure formed by a flange and bolts.

[0013] Specifically, a first piston is slidably installed in the lower part of the temporary storage cylinder. A connecting pipe is installed at the bottom of the temporary storage cylinder. A vertically arranged air cylinder is installed at the end of the connecting pipe away from the temporary storage cylinder. A cylinder cover is installed at the upper end of the air cylinder. A vertical pipe head is installed on the upper surface of the cylinder cover. The upper end of the vertical pipe head is installed at the bottom of the water tank shell. A guide hole is opened at the bottom of the water tank shell, which is concentric with the vertical pipe head. A guide rod is inserted in the guide hole. The upper end of the guide rod extends into the water tank shell and is equipped with a partition. The partition is slidably installed in the space formed by the water tank shell and the cleaning cylinder. In the initial state, the partition is located above the connecting port. The lower end of the guide rod passes through the vertical pipe head and extends into the air cylinder. A second piston is installed at the lower end of the guide rod. The second piston is slidably installed in the air cylinder. A vertically arranged compression spring is provided on the lower side of the second piston. The compression spring is located in the lower part of the air cylinder.

[0014] Specifically, a sealing sleeve is glued inside the vertical tube head, and the sealing sleeve is wrapped around the guide rod. The inner diameter of the sealing sleeve is the same as the diameter of the guide rod, and the diameter of the guide rod is the same as the inner diameter of the guide hole.

[0015] Specifically, the lower surface of the partition plate is recessed upward to form a first blind hole, the upper surface of the second piston is recessed downward to form a second blind hole, and the two ends of the guide rod are respectively installed in the first blind hole and the second blind hole.

[0016] Specifically, the side of the partition facing the washing cylinder is machined with an arc-shaped surface, which fits into the surface of the washing cylinder, and the cross-section of the water tank shell is U-shaped.

[0017] Specifically, a base is installed at the bottom of the cleaning cylinder, the circulation pump is bolted to the upper surface of the base, and the ultrafiltration membrane filter is bolted to the upper surface of the base.

[0018] Specifically, a horizontal pipe head is installed on the upper part of the outer surface of the cleaning cylinder, and a first butterfly valve is provided on the lower side of the horizontal pipe head. The first butterfly valve is connected and fixed to the cleaning cylinder and communicates with the cleaning cylinder. A transparent tube is installed on the horizontal pipe head through a structure formed by flanges and bolts. The end of the first butterfly valve away from the cleaning cylinder is connected and communicates with the lower end of the transparent tube. The lower end of the transparent tube is open, and a shut-off valve is installed at the lower end of the transparent cylinder.

[0019] This invention also provides a processing technology for a novel dried fruit, comprising the following steps:

[0020] Step 1: Close the second butterfly valve at the bottom of the cleaning cylinder and the fourth butterfly valve at the inlet of the ultrafiltration membrane filter. Pour clean water into the cleaning cylinder until it covers the connecting port. Check the sealing of the water tank shell, the temporary storage cylinder and all pipe connections to ensure there is no leakage.

[0021] Step 2: Place the salted dried fruit into the mesh basket, then place the mesh basket into the washing cylinder, open the first butterfly valve, and observe the liquid level in the washing cylinder through the transparent tube.

[0022] Step 3: Start the circulation pump, open the second and third butterfly valves, so that the water in the washing drum enters the circulation pump through the outlet pipe, and then is transported to the water tank shell through the water supply pipe, the third butterfly valve, and the outlet pipe; the water in the water tank shell flows back to the washing drum through the connecting port, forming a preliminary water circulation, and using the water flow to wash away the floating salt on the surface of the dried fruit.

[0023] Step 4: Open the second and fourth butterfly valves and close the third butterfly valve to allow circulating water to enter the ultrafiltration membrane filter, removing suspended impurities, small molecule organic matter and salt from the water. The purified water is then replenished to the cleaning cylinder through the bend and connecting pipe, realizing the purification and reuse of water circulation and reducing water consumption.

[0024] The advantages of this invention compared to the prior art are:

[0025] The water flow is driven by a circulating pump to form an internal circulation between the cleaning cylinder and the water tank shell. The water flow that initially washes away the floating salt does not need to be discharged directly. Instead, it passes through an ultrafiltration membrane filter to remove suspended impurities, small molecule organic matter and salt. The water is then recovered by a temporary storage cylinder and replenished to the circulation system, realizing the reuse of water resources. This completely changes the inefficient mode of traditional processes where water is discharged after a single rinse, reducing water consumption from the source.

[0026] After ultrafiltration purification, the saline water is recycled, requiring only a small amount of fresh water to be added periodically, which greatly reduces the discharge of high-salt wastewater. Even if a small amount of overflow enters the storage tank, it will be purified and re-entered into the circulation, avoiding direct discharge that could damage the osmotic pressure of the soil and water bodies, which is in line with the concept of green processing.

[0027] First, the free floating salt on the surface of the dried fruit is removed by water circulation rinsing, avoiding the problem of reverse osmosis of high surface salt in traditional processes; then, the low-salt water purified by ultrafiltration is continuously circulated, and the concentration difference is used to promote the slow seepage of deep salt inside the dried fruit, solving the limitation that simple rinsing can only act on the surface, making desalination more uniform and flavor more balanced.

[0028] When water flows out through the outlet pipe into the water tank shell, the water flow impacts the baffle, causing the baffle to move downwards. The baffle, through the guide rod, drives the second piston to move downwards, thereby squeezing and compressing the spring. This causes the air in the air cylinder to flow through the connecting pipe into the lower space inside the temporary storage cylinder. Subsequently, the first piston moves upwards and pushes the water in the temporary storage cylinder to the overflow pipe, preventing water from remaining in the temporary storage cylinder. At the same time, a bend is installed between the temporary storage cylinder and the connecting pipe to prevent water in the temporary storage cylinder from flowing into the connecting pipe. Attached Figure Description

[0029] Figure 1 This is a 3D diagram of a desalination processing equipment.

[0030] Figure 2 This is a three-dimensional view of a desalination processing equipment from another perspective.

[0031] Figure 3 This is a top view of a desalination processing equipment.

[0032] Figure 4 yes Figure 3 Sectional view at point AA.

[0033] Figure 5 yes Figure 3 Sectional view at point BB.

[0034] Figure 6 This is an assembly diagram of a temporary storage cylinder, cylinder cover, partition, and air cylinder in a desalination processing equipment.

[0035] Figure 7This is an assembly diagram of the second piston, guide rod, partition plate, and cylinder cover in a desalination processing device.

[0036] Figure 8 This is a schematic diagram of the assembly of a water tank shell and a cleaning cylinder in a desalination processing equipment.

[0037] The numbers on the map are:

[0038] 1. Cleaning cylinder; 11. Horizontal pipe head; 12. Transparent pipe; 13. First butterfly valve; 14. Second butterfly valve; 15. Water tank shell; 16. Connecting port; 17. Overflow pipe; 18. Guide hole;

[0039] 2. Circulating pump; 21. Inlet pipe; 22. Outlet pipe; 23. Third butterfly valve; 24. Outlet pipe;

[0040] 3. Ultrafiltration membrane filter; 31. Fourth butterfly valve; 32. Connecting pipe; 33. Branch pipe;

[0041] 4. Base;

[0042] 5. Air pump; 51. Cylinder cap; 52. Connecting pipe; 53. Partition plate; 54. Guide rod; 55. Second piston; 56. Compression spring; 57. Vertical pipe head; 58. Sealing sleeve;

[0043] 6. Temporary storage cylinder; 61. Bend; 62. First pipe joint; 63. Second pipe joint; 64. First piston. Detailed Implementation

[0044] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0045] See Figures 1-8 As shown, a desalination processing device includes a washing cylinder 1 with an open upper end. A second butterfly valve 14 is installed on the outer surface of the lower end of the washing cylinder 1. A water tank shell 15 is installed on the upper part of the outer surface of the washing cylinder 1 with an open upper end. A connecting port 16 is provided in the area of ​​the washing cylinder 1 covered by the water tank shell 15. The cross-section of the water tank shell 15 is U-shaped. The design of the connecting port 16 enables the internal space of the water tank shell 15 to communicate with the internal space of the washing cylinder 1.

[0046] An overflow pipe 17, offset from the water tank shell 15, is installed on the upper part of the outer surface of the washing cylinder 1. A temporary storage cylinder 6 is installed at the end of the overflow pipe 17 away from the washing cylinder 1. The temporary storage cylinder 6 is connected to the connecting pipe 32 and the overflow pipe 17. A first pipe joint 62 is installed at the middle of the outer surface of the temporary storage cylinder 6. The first pipe joint 62 is connected to the overflow pipe 17 through a structure formed by a flange and bolts. A second pipe joint 63 is installed on the side of the outer surface of the temporary storage cylinder 6 away from the first pipe joint 62. The height of the second pipe joint 63 is the same as the height of the first pipe joint 62. The end of the bend pipe 61 away from the connecting pipe 32 is connected to the second pipe joint 63 through a structure formed by a flange and bolts. When the mesh basket containing dried fruit is placed into the washing cylinder 1, some of the water in the washing cylinder 1 is squeezed and flows into the temporary storage cylinder 6 through the overflow pipe 17.

[0047] The circulation pump 2 has an inlet pipe 21 installed at its inlet end. The end of the inlet pipe 21 away from the circulation pump 2 is connected to the second butterfly valve 14. The circulation pump 2 has a water supply pipe 22 installed at its outlet end. The water supply pipe 22 is arranged vertically. The upper end of the water supply pipe 22 is equipped with a third butterfly valve 23. The upper end of the third butterfly valve 23 is equipped with an outlet pipe 24. The end of the outlet pipe 24 away from the third butterfly valve 23 extends to the upper part of the water tank shell 15. The ultrafiltration membrane filter 3 has a fourth butterfly valve 31 installed at its inlet end. The end of the fourth butterfly valve 31 away from the ultrafiltration membrane filter 3 is equipped with a branch pipe 33. The end of the branch pipe 33 away from the fourth butterfly valve 31 is connected to the water supply pipe 22. The ultrafiltration membrane filter 3 has a connecting pipe 32 installed at its outlet end. The cleaning cylinder 1 has a base 4 installed at its bottom. The circulation pump 2 is installed on the upper surface of the base 4 by bolts. The ultrafiltration membrane filter 3 is installed on the upper surface of the base 4 by bolts. The base 4 supports the cleaning cylinder 1, the circulation pump 2, and the ultrafiltration membrane filter 3.

[0048] A complete internal circulation system is constructed between the washing cylinder 1 and the water tank shell 15 by driving water flow through the circulation pump 2, fundamentally changing the water resource utilization mode of the traditional rinsing process. The water flow initially used to rinse off the floating salt on the surface of the dried fruit is no longer directly discharged as in the traditional way, but is introduced into the ultrafiltration membrane filter 3 through pipelines. This purification process can effectively intercept suspended impurities, small molecule organic matter and excess salt in the water, turning the originally salty wastewater into clean circulating water. The purified water flow is collected by the temporary storage cylinder 6 and then reinjected into the circulation system to participate in rinsing, forming a closed loop of use, purification and reuse, allowing every unit of water resource to play a role multiple times, completely abandoning the extensive mode of discharge after a single rinse, and reducing the consumption of fresh water from the source.

[0049] In terms of environmental performance, this circular design demonstrates significant advantages: the saline solution, after ultrafiltration purification, continuously participates in the circulation. The entire process only requires periodic replenishment of small amounts of fresh water based on natural evaporation to maintain system balance, thus significantly reducing the discharge of high-salinity wastewater. Even if a small amount of water overflows due to level fluctuations during the circulation process, it will flow into the temporary storage tank 6, undergo purification treatment, and return to the circulation loop. This avoids the osmotic pressure damage to soil and water bodies caused by the direct discharge of untreated saline solution, thus practicing the concept of green processing from the process design perspective.

[0050] In terms of desalination effectiveness, this process achieves synergistic removal of surface and deep salts through a step-by-step circulation. First, the flowing circulating water continuously washes the surface of the dried fruit, quickly removing attached free salt and preventing the high concentration of surface salt from seeping back into the dried fruit due to osmosis, which can lead to increased saltiness. Then, the ultrafiltration-purified low-salt water continues to circulate in the system, gently pushing deep salts slowly into the water by utilizing the salt concentration difference between the inside of the dried fruit and the external water. This overcomes the limitation of simple rinsing, which only affects the surface and cannot reach the salt in the skin texture or shallow tissues. This layered desalination method ensures thorough desalination while also making the salt distribution more even, ultimately resulting in a balanced flavor and a moderately salty taste.

[0051] A bent tube 61 is installed at the middle of the outer surface of the temporary storage cylinder 6. The upper end of the bent tube 61 is higher than the upper end of the temporary storage cylinder 6. The upper end of the bent tube 61 is connected to the end of the connecting tube 32 that is away from the ultrafiltration membrane filter 3. A first piston 64 is slidably installed in the lower part of the temporary storage cylinder 6. A connecting pipe 52 is installed at the bottom of the temporary storage cylinder 6. A vertically arranged air cylinder 5 is installed at the end of the connecting pipe 52 away from the temporary storage cylinder 6. A cylinder cover 51 is installed at the upper end of the air cylinder 5. A vertical pipe head 57 is installed on the upper surface of the cylinder cover 51. The upper end of the vertical pipe head 57 is installed at the bottom of the water tank shell 15. A guide hole 18 is opened at the bottom of the water tank shell 15, which is concentric with the vertical pipe head 57. A guide rod 54 is inserted in the guide hole 18. The upper end of the guide rod 54 extends into the water tank shell 15 and is equipped with a partition 53. The partition 53 is slidably installed in the space formed by the water tank shell 15 and the cleaning cylinder 1. In the initial state, the partition 53 is located above the connecting port 16. The side of the partition 53 facing the cleaning cylinder 1 is machined with an arc-shaped surface so that the arc-shaped surface fits against the surface of the cleaning cylinder 1, which facilitates the partition 53 to divide the space inside the water tank shell 15.

[0052] The lower end of the guide rod 54 passes through the vertical pipe head 57 and extends into the air cylinder 5. A sealing sleeve 58 is glued inside the vertical pipe head 57. The sealing sleeve 58 wraps around the guide rod 54. The inner diameter of the sealing sleeve 58 is the same as the diameter of the guide rod 54. The diameter of the guide rod 54 is the same as the inner diameter of the guide hole 18. A second piston 55 is installed at the lower end of the guide rod 54. The second piston 55 is slidably installed in the air cylinder 5. The lower surface of the partition plate 53 is recessed upward to form a first blind hole. The upper surface of the second piston 55 is recessed downward to form a second blind hole. This allows the two ends of the guide rod 54 to be installed in the first blind hole and the second blind hole, respectively, increasing the connection range between the guide rod 54, the partition plate 53, and the second piston 55.

[0053] A vertically arranged compression spring 56 is located below the second piston 55, within the lower part of the air cylinder 5. When water flows through the outlet pipe 24 into the water tank shell 15, its impact force pushes the baffle 53 downward. Through the linkage of the guide rod 54, the baffle 53 drives the second piston 55 within the air cylinder 5 to move downward synchronously, thereby compressing the compression spring 56 at the bottom. As the second piston 55 descends, the air within the air cylinder 5 is compressed and forced into the lower space of the temporary storage cylinder 6 through the connecting pipe 52, forcing the first piston 64 within the temporary storage cylinder 6 to rise upward. During this process, the first piston 64 gradually pushes the water within the temporary storage cylinder 6 to the overflow pipe 17, ensuring that no water remains in the temporary storage cylinder 6 and maintaining the cleanliness and unobstructed flow of the internal space.

[0054] Meanwhile, a bend 61 is specifically installed between the temporary storage cylinder 6 and the connecting pipe 32. This bend 61 design forms a physical barrier, effectively preventing water from accidentally flowing into the connecting pipe 32 due to pressure fluctuations or liquid level changes when water in the temporary storage cylinder 6 is pushed to the overflow pipe 17. This ensures that the water flow strictly follows the preset path, guaranteeing the stable operation of the entire system. This structural combination not only achieves complete emptying of the temporary storage cylinder 6 but also maintains the orderly flow of water between pipes through the backflow prevention function of the bend 61, improving the reliability of equipment operation.

[0055] A horizontal pipe head 11 is installed on the upper part of the outer surface of the cleaning cylinder 1. A first butterfly valve 13 is located on the lower side of the horizontal pipe head 11. The first butterfly valve 13 is connected and fixed to the cleaning cylinder 1 and communicates with the cleaning cylinder 1. A transparent tube 12 is installed on the horizontal pipe head 11 through a structure formed by flanges and bolts. The end of the first butterfly valve 13 away from the cleaning cylinder 1 is connected to the lower end of the transparent tube 12. The lower end of the transparent tube 12 is open and a shut-off valve is installed at the lower end of the transparent tube 12. After opening the first butterfly valve 13, the interior of the cleaning cylinder 1 is connected to the transparent tube 12. With the visualization characteristics of the transparent tube 12, the changes in the liquid level inside the cleaning cylinder 1 can be directly observed. The transparent material of the transparent tube 12 allows the operator to clearly see the real-time corresponding height of the water column inside the transparent tube 12 and the liquid level inside the cleaning cylinder 1. Without opening the equipment or performing contact measurement, it is possible to accurately determine whether the liquid level has reached the preset position. Whether it is to confirm whether the water volume has exceeded the connection port 16 during the initial water injection or to monitor water level fluctuations during the desalination process, this structure can achieve convenient monitoring. The simplified operation process makes liquid level adjustment more precise and efficient, providing an intuitive basis for judging the stable operation of subsequent water circulation.

[0056] A processing technology for a novel type of dried fruit, applied to a desalination processing device, includes the following steps:

[0057] Step 1: Close the second butterfly valve 14 at the lower end of the cleaning cylinder 1 and the fourth butterfly valve 31 at the inlet of the ultrafiltration membrane filter 3. Pour clean water into the cleaning cylinder 1 until it covers the connecting port 16. Check the sealing of the water tank shell 15, the temporary storage cylinder 6 and the connection of each pipeline to ensure that there is no leakage.

[0058] Step 2: Place the salted dried fruit into the mesh basket, then place the mesh basket into the washing cylinder 1, open the first butterfly valve 13, and observe the liquid level in the washing cylinder 1 through the transparent tube 12.

[0059] Step 3: Start the circulation pump 2, open the second butterfly valve 14 and the third butterfly valve 23, so that the water in the washing cylinder 1 enters the circulation pump 2 through the water outlet pipe 24, and is then transported to the water tank shell 15 through the water supply pipe 22, the third butterfly valve 23, and the water outlet pipe 24; the water in the water tank shell 15 flows back to the washing cylinder 1 through the connecting port 16, forming a preliminary water circulation, and using the water flow to wash away the floating salt on the surface of the dried fruit;

[0060] Step 4: Open the second butterfly valve 14 and the fourth butterfly valve 31, and close the third butterfly valve 23 to allow circulating water to enter the ultrafiltration membrane filter 3, removing suspended impurities, small molecule organic matter and salt from the water. The purified water is then replenished to the cleaning cylinder 1 through the bend pipe 61 and the connecting pipe 32, realizing the purification and reuse of water circulation and reducing water consumption.

[0061] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A desalination processing device, characterized in that, include: A cleaning cylinder (1) has an open top. A second butterfly valve (14) is installed on the outer surface of the lower end of the cleaning cylinder (1). A water tank shell (15) is installed on the upper part of the outer surface of the cleaning cylinder (1). The upper end of the water tank shell (15) is open. A communication port (16) is opened in the area of ​​the cleaning cylinder (1) covered by the water tank shell (15). An overflow pipe (17) is installed on the upper part of the outer surface of the cleaning cylinder (1) and is arranged in a staggered manner with the water tank shell (15). A circulating pump (2) has an inlet pipe (21) installed at its inlet end. The end of the inlet pipe (21) away from the circulating pump (2) is connected to a second butterfly valve (14). A water delivery pipe (22) is installed at the outlet end of the circulating pump (2). The water delivery pipe (22) is arranged vertically. A third butterfly valve (23) is installed at the upper end of the water delivery pipe (22). An outlet pipe (24) is installed at the upper end of the third butterfly valve (23). The end of the outlet pipe (24) away from the third butterfly valve (23) extends to the upper part of the water tank shell (15). An ultrafiltration membrane filter (3) is provided with a fourth butterfly valve (31) installed at its inlet end. A branch pipe (33) is installed at the end of the fourth butterfly valve (31) away from the ultrafiltration membrane filter (3). The end of the branch pipe (33) away from the fourth butterfly valve (31) is connected to the water supply pipe (22). A connecting pipe (32) is installed at the outlet end of the ultrafiltration membrane filter (3). A temporary storage tube (6) is installed at the end of the overflow pipe (17) away from the cleaning tube (1), and the temporary storage tube (6) is connected to the connecting pipe (32) and the overflow pipe (17).

2. The desalination processing equipment according to claim 1, characterized in that, A bend (61) is installed at the middle of the outer surface of the temporary storage cylinder (6). The upper end of the bend (61) is higher than the upper end of the temporary storage cylinder (6). The upper end of the bend (61) is connected to the end of the connecting pipe (32) away from the ultrafiltration membrane filter (3).

3. The desalination processing equipment according to claim 2, characterized in that, A first pipe joint (62) is installed at the middle of the outer surface of the temporary storage cylinder (6). The first pipe joint (62) is connected to the overflow pipe (17) through a structure formed by a flange and bolts. A second pipe joint (63) is installed on the outer surface of the temporary storage cylinder (6) away from the first pipe joint (62). The height of the second pipe joint (63) is the same as the height of the first pipe joint (62). The end of the bend (61) away from the connecting pipe (32) is connected to the second pipe joint (63) through a structure formed by a flange and bolts.

4. The desalination processing equipment according to claim 3, characterized in that, A first piston (64) is slidably installed in the lower part of the temporary storage cylinder (6). A connecting pipe (52) is installed at the bottom of the temporary storage cylinder (6). A vertically arranged air cylinder (5) is installed at the end of the connecting pipe (52) away from the temporary storage cylinder (6). A cylinder cover (51) is installed at the upper end of the air cylinder (5). A vertical pipe head (57) is installed on the upper surface of the cylinder cover (51). The upper end of the vertical pipe head (57) is installed at the bottom of the water tank shell (15). A guide hole (18) is opened at the bottom of the water tank shell (15) and is concentrically arranged with the vertical pipe head (57). A guide rod (54) is inserted in the guide hole (18). The upper end extends into the water tank shell (15) and is equipped with a partition (53). The partition (53) is slidably installed in the space formed by the water tank shell (15) and the cleaning cylinder (1). In the initial state, the partition (53) is located above the communication port (16). The lower end of the guide rod (54) passes through the vertical pipe head (57) and extends into the air cylinder (5). The lower end of the guide rod (54) is equipped with a second piston (55). The second piston (55) is slidably installed in the air cylinder (5). A vertically arranged compression spring (56) is provided on the lower side of the second piston (55). The compression spring (56) is located in the lower part of the air cylinder (5).

5. The desalination processing equipment according to claim 4, characterized in that, A sealing sleeve (58) is glued inside the vertical tube head (57). The sealing sleeve (58) wraps around the guide rod (54). The inner diameter of the sealing sleeve (58) is the same as the diameter of the guide rod (54). The diameter of the guide rod (54) is the same as the inner diameter of the guide hole (18).

6. The desalination processing equipment according to claim 4, characterized in that, The lower surface of the partition (53) is recessed upward to form a first blind hole, and the upper surface of the second piston (55) is recessed downward to form a second blind hole. The two ends of the guide rod (54) are respectively installed in the first blind hole and the second blind hole.

7. The desalination processing equipment according to claim 4, characterized in that, The partition (53) has an arc-shaped surface on the side facing the cleaning cylinder (1), and the arc-shaped surface is in contact with the surface of the cleaning cylinder (1). The water tank shell (15) has a U-shaped cross-section.

8. The desalination processing equipment according to claim 1, characterized in that, The bottom of the cleaning cylinder (1) is equipped with a base (4), the circulation pump (2) is installed on the upper surface of the base (4) by bolts, and the ultrafiltration membrane filter (3) is installed on the upper surface of the base (4) by bolts.

9. The desalination processing equipment according to claim 1, characterized in that, A horizontal pipe head (11) is installed on the upper part of the outer surface of the cleaning cylinder (1). A first butterfly valve (13) is provided on the lower side of the horizontal pipe head (11). The first butterfly valve (13) is connected and fixed to the cleaning cylinder (1) and communicates with the cleaning cylinder (1). A transparent pipe (12) is installed on the horizontal pipe head (11) through a structure formed by flanges and bolts. The end of the first butterfly valve (13) away from the cleaning cylinder (1) is connected and communicates with the lower end of the transparent pipe (12). The lower end of the transparent pipe (12) is open. A stop valve is installed at the lower end of the transparent pipe (12).

10. A processing technology for a novel dried fruit, applied to the desalination processing equipment described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Close the second butterfly valve (14) at the bottom of the cleaning cylinder (1) and the fourth butterfly valve (31) at the inlet of the ultrafiltration membrane filter (3). Pour clean water into the cleaning cylinder (1) until it covers the connecting port (16). Check the sealing of the water tank shell (15), the temporary storage cylinder (6) and the connection of each pipeline to ensure that there is no leakage. Step 2: Place the salted dried fruit into the mesh basket, then place the mesh basket into the washing tube (1), open the first butterfly valve (13), and observe the liquid level in the washing tube (1) through the transparent tube (12); Step 3: Start the circulation pump (2), open the second butterfly valve (14) and the third butterfly valve (23) so that the water in the washing cylinder (1) enters the circulation pump (2) through the outlet pipe (24), and is then transported to the water tank shell (15) through the water supply pipe (22), the third butterfly valve (23) and the outlet pipe (24); the water in the water tank shell (15) flows back to the washing cylinder (1) through the connecting port (16) to form a preliminary water circulation, and uses the water flow to wash away the floating salt on the surface of the dried fruit; Step 4: Open the second butterfly valve (14) and the fourth butterfly valve (31), and close the third butterfly valve (23) to allow circulating water to enter the ultrafiltration membrane filter (3) to remove suspended impurities, small molecule organic matter and salt in the water. The purified water is then replenished to the cleaning cylinder (1) through the bend pipe (61) and the connecting pipe (32) to achieve water circulation purification and reuse, and reduce water consumption.

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