High-salt wastewater circulating crystallization drying equipment

Abstract

The utility model discloses a kind of high-salinity wastewater circulation crystallization drying equipment, including the crystallization outer cylinder shell of axis horizontal arrangement, rotationally connected with the rotation driving shaft coaxial with it in crystallization outer cylinder shell, and crystallization coating roller is fixed on rotation driving shaft;Crystallization outer cylinder shell is rotationally connected with the coating shaft of being arranged parallel to its axis in, and spongy layer is shared on coating shaft;Waste water delivery pipe is fixed in crystallization outer cylinder shell and located above coating shaft, and multiple waste water nozzles are equipped in waste water delivery pipe lower side;Multiple crystallization scrapers are fixed in crystallization outer cylinder shell and located crystallization coating roller lower side;High-salinity wastewater is evenly applied on the surface of crystallization coating roller, forms thin layer liquid film, this "thin layer coating" design greatly increases the contact area of wastewater and air, heat source, significantly accelerates moisture evaporation and salinity crystallization rate, solve the problem of "local concentration uneven, crystallization efficiency low" in traditional crystallization.

Description

Technical Field

[0001] This utility model relates to the field of high-salt wastewater crystallization technology, specifically a high-salt wastewater circulating crystallization and drying equipment. Background Technology

[0002] High-salinity wastewater refers to industrial or domestic wastewater with a dissolved inorganic salt content far exceeding that of conventional wastewater. Its core characteristic is "high salt concentration," which has a strong impact on the environment and treatment equipment.

[0003] High-salinity wastewater almost entirely originates from industrial production, with typical scenarios including the chemical industry, printing and dyeing industry, food processing, and power / metallurgy.

[0004] High-salt wastewater recycling crystallization is a core treatment technology aimed at "reduction, resource recovery, and zero discharge". Essentially, it recovers salt from wastewater in solid form through "evaporation concentration + crystallization separation + energy / material recycling", while purifying the water for reuse or discharge.

[0005] However, existing crystallization drying equipment still lacks in continuous operation and needs further improvement and optimization. Utility Model Content

[0006] The purpose of this invention is to provide a circulating crystallization and drying device for high-salt wastewater, which can continuously and uninterruptedly crystallize and dry high-salt wastewater.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-salt wastewater circulating crystallization and drying device includes a crystallization outer shell arranged horizontally along its axis, a rotating drive shaft coaxial with the crystallization outer shell is rotatably connected inside the crystallization outer shell, and a crystallization coating roller is fixed on the rotating drive shaft.

[0009] The outer shell of the crystallizer is rotatably connected to a coated shaft arranged parallel to its axis, and the coated shaft is covered with a sponge layer.

[0010] A wastewater conveying pipe is fixed inside the outer shell of the crystallization cylinder above the coating shaft, and multiple wastewater nozzles are provided on the lower side of the wastewater conveying pipe.

[0011] Multiple crystallization scrapers are fixed inside the outer shell of the crystallization cylinder, located below the crystallization coating roller. The upper edge of the crystallization scraper is in contact with the outer surface of the crystallization coating roller.

[0012] A crystallization temporary storage shell is fixed at the bottom of the outer crystallization shell. The outer crystallization shell is connected to the inside of the crystallization temporary storage shell through multiple crystallization leak holes. The bottom of the crystallization temporary storage shell has a collection drain pipe with an external discharge control valve.

[0013] Preferably, a first partition plate is fixed at the top of the inner cavity of the outer crystallizing shell and arranged along its radial plane, and a second partition plate is fixed at the bottom of the inner cavity of the outer crystallizing shell and arranged along its radial plane.

[0014] The first and second partition plates divide the space between the inner wall of the crystallization outer cylinder shell and the outer wall of the crystallization coating roller into a coating input chamber and a crystallization drying chamber.

[0015] The coating shaft is located in the coating input chamber;

[0016] There is a flow gap between the lower edge of the first partition plate and the upper side of the crystallization coating roller;

[0017] A sealing strip is provided between the upper edge of the second partition plate and the lower side of the crystallization coating roller.

[0018] Explanation: After the crystallization coating roller rotates once, it returns to the coating shaft. A uniform layer of high-salt wastewater is then applied to the outer surface of the crystallization coating roller using a sponge layer. This process is repeated to carry out crystallization.

[0019] Preferably, the outer shell of the crystallizer has a transparent panel on its side wall that communicates with the crystallization drying chamber, and multiple reflectors are built on the ground. The reflectors can reflect sunlight and allow sunlight to pass through the transparent panel and shine on the crystallization coating roller.

[0020] Explanation: The heat from sunlight causes the high-salt wastewater coating to evaporate rapidly, leaving a thin layer of salt crystals on the crystallization coating roller after the water evaporates.

[0021] Preferably, multiple air inlet pipes connected to the crystallization drying chamber are fixed on the outside of the crystallization outer shell, and multiple air outlet pipes connected to the coating inlet chamber are fixed on the outside of the crystallization outer shell.

[0022] A vapor condenser is connected to the vent outlet pipe, and the vapor condenser is arranged in a zigzag pattern and immersed in a cooling pool;

[0023] The output end of the steam condenser is connected to a condensate storage tank.

[0024] Explanation: During the crystallization process of high-salt wastewater, dry air is introduced into the crystallization drying chamber through the air inlet pipe using a blower with existing technology. The air flows along the outer surface of the crystallization coating roller and enters the coating inlet chamber through the flow gap. Increasing the air velocity helps to accelerate the drying speed, and the air can carry away water vapor.

[0025] Preferably, a drive housing is fixed to the outer end of the crystallizing outer shell, one end of the rotary drive shaft extends into the interior of the drive housing, a driven worm gear is fixed to the end of the rotary drive shaft extending into the drive housing, a rotary drive motor is fixed inside the drive housing, a drive worm is fixed to the output shaft of the rotary drive motor, and the drive worm is meshed with the driven worm gear.

[0026] Explanation: The output shaft of the rotary drive motor drives the rotary drive shaft to rotate through the meshing connection between the drive worm and the driven worm wheel. The rotary drive shaft then drives the crystallization coating roller to rotate together with it.

[0027] Compared with the prior art, the beneficial effects of this utility model are reflected in the following aspects:

[0028] 1. This utility model has a reasonable and ingenious structural design, and the crystallization process is efficient and controllable. Through the cooperation of the coating shaft and the wastewater nozzle, the high-salt wastewater is first sprayed onto the sponge layer through the nozzle, and then the rotating sponge layer is evenly coated onto the surface of the crystallization coating roller to form a thin liquid film. This "thin coating" design greatly increases the contact area between wastewater and air and heat source, significantly accelerates the evaporation of water and the crystallization rate of salt, and solves the problems of "uneven local concentration and low crystallization efficiency" in traditional crystallization.

[0029] 2. This utility model is easy to operate, with a partitioned isolation design that significantly improves drying efficiency. Based on the chamber division of the first and second partition plates, the equipment achieves physical isolation between coating and drying, precisely optimizing the drying environment. The separated coating input chamber focuses on uniformly distributing the wastewater film, while the crystallization drying chamber focuses on water evaporation and salt solidification, avoiding the interference of moisture generated during the coating process with the drying area.

[0030] 3. This utility model uses a fully automatic directional tracking reflector to accurately reflect sunlight and irradiate it onto the crystallization coating roller through a transparent panel. It uses solar energy as the core drying heat source, which greatly reduces the consumption of traditional energy sources such as electricity and heat. Attached Figure Description

[0031] Figure 1 This is the front view of this utility model;

[0032] Figure 2 yes Figure 1 The right view;

[0033] Figure 3 This is a right view of the drive housing of this utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the reflector of this utility model.

[0035] In the diagram, 10-crystallization outer shell, 101-coating input chamber, 102-crystallization drying chamber, 103-transparent panel, 104-reflector, 11-rotary drive shaft, 12-crystallization coating roller, 13-coating shaft, 131-sponge layer, 14-wastewater conveying pipe, 15-crystallization scraper, 16-crystallization temporary storage shell, 161-crystallization leak hole, 162-collection drain pipe, 1620-drain control valve, 171-first partition plate, 172-second partition plate, 170-flow gap, 1720-sealing strip, 181-ventilation input pipe, 182-ventilation output pipe, 183-steam condenser pipe, 184-cooling pool, 185-condensate temporary storage pool, 19-drive housing shell, 191-driven worm gear, 192-rotary drive motor, 193-drive worm. Detailed Implementation

[0036] The following is combined Figures 1-4 This utility model will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of their respective main views or structural schematic diagrams.

[0037] Example 1:

[0038] A high-salt wastewater recycling crystallization and drying device, such as Figure 1 As shown, it includes a crystallization outer shell 10 arranged horizontally along its axis, a rotating drive shaft 11 coaxial with the crystallization outer shell 10 is rotatably connected inside the crystallization outer shell 10, and a crystallization coating roller 12 is fixed on the rotating drive shaft 11.

[0039] A coating shaft 13 is rotatably connected inside the crystallization outer shell 10 and arranged parallel to its axis. A sponge layer 131 is attached to the coating shaft 13.

[0040] Inside the crystallization outer shell 10, above the coating shaft 13, a wastewater conveying pipe 14 is fixed, and multiple wastewater nozzles 141 are provided on the lower side of the wastewater conveying pipe 14.

[0041] Inside the outer shell 10 of the crystallization cylinder, there are multiple crystallization scrapers 15 fixed below the crystallization coating roller 12. The upper edge of the crystallization scraper 15 is in contact with the outer surface of the crystallization coating roller 12.

[0042] The bottom of the crystallization outer shell 10 is fixed with a crystallization temporary storage shell 16. The crystallization outer shell 10 is connected to the inside of the crystallization temporary storage shell 16 through multiple crystallization leakage holes 161. The bottom of the crystallization temporary storage shell 16 has a collection drain pipe 162, and the collection drain pipe 162 has an external discharge control valve 1620.

[0043] Example 2:

[0044] Based on Example 1, such as Figure 1As shown, a first partition plate 171 is fixed at the top inside the crystallization outer shell 10 and arranged along its radial plane, and a second partition plate 172 is fixed at the bottom inside the crystallization outer shell 10 and arranged along its radial plane.

[0045] The first partition plate 171 and the second partition plate 172 divide the space between the inner wall of the crystallization outer shell 10 and the outer wall of the crystallization coating roller 12 into a coating input chamber 101 and a crystallization drying chamber 102.

[0046] The coating shaft 13 is disposed in the coating input chamber 101;

[0047] There is a flow gap 170 between the lower edge of the first partition plate 171 and the upper side of the crystallization coating roller 12;

[0048] A sealing strip 1720 is provided between the upper edge of the second partition plate 172 and the lower side of the crystallization coating roller 12.

[0049] Example 3:

[0050] Based on Example 2, such as Figure 2 As shown, the outer shell 10 of the crystallization chamber has a transparent panel 103 on its side wall that communicates with the crystallization drying chamber 102, such as... Figure 4 As shown, multiple reflectors 104 are built on the ground. The reflectors 104 can reflect sunlight and allow sunlight to pass through the transparent panel 103 and shine on the crystal coating roller 12.

[0051] Reflector 104 is a fully automatic reflector with directional tracking function in the prior art, referring to the reflector used in solar molten salt power plants.

[0052] Example 4:

[0053] Based on Example 3, such as Figure 1 As shown, multiple air inlet pipes 181 connected to the crystallization drying chamber 102 are fixed on the outside of the crystallization outer shell 10, and multiple air outlet pipes 182 connected to the coating inlet chamber 101 are fixed on the outside of the crystallization outer shell 10.

[0054] A vapor condenser pipe 183 is connected to the ventilation outlet pipe 182. The vapor condenser pipe 183 is arranged in a zigzag pattern and immersed in a cooling pool 184.

[0055] The output end of the steam condenser 183 is connected to a condensate storage tank 185.

[0056] Example 5:

[0057] Based on Example 4, such as Figure 3As shown, a drive housing 19 is fixed to the outer end of the crystallization outer cylinder shell 10. One end of the rotary drive shaft 11 extends into the interior of the drive housing 19. A driven worm gear 191 is fixed to the end of the rotary drive shaft 11 that extends into the interior of the drive housing 19. A rotary drive motor 192 is fixed inside the drive housing 19. A drive worm 193 is fixed to the output shaft of the rotary drive motor 192. The drive worm 193 is meshed with the driven worm gear 191.

[0058] The rotary drive motor 192 is a servo motor of the prior art.

[0059] In practical applications, this invention uses multiple reflectors 104 to reflect sunlight during the day and allows sunlight to pass through the transparent panel 103 and irradiate the crystallizing coating roller 12.

[0060] The output shaft of the rotary drive motor 192 drives the rotary drive shaft 11 to rotate via the meshing connection between the drive worm 193 and the driven worm gear 191. The rotary drive shaft 11 then drives the crystallization coating roller 12 to rotate together. Figure 1 For reference, the crystallization coating roller 12 rotates clockwise;

[0061] The sponge layer 131 presses against the outer surface of the crystallization coating roller 12, which in turn causes the sponge layer 131 to rotate along with the coating shaft 13. Figure 1 For reference, the coated shaft 13 and the sponge layer 131 rotate counterclockwise;

[0062] Using a pump with existing technology, the high-salt wastewater to be treated is transported to the wastewater transport pipe 14. The high-salt wastewater is then sprayed out from multiple wastewater nozzles 141, so that the high-salt wastewater is sprayed onto the sponge layer 131. As the crystallization coating roller 12 and the coating shaft 13 rotate relative to each other, and by using the mutual squeezing action between the sponge layer 131 and the outer side of the crystallization coating roller 12, the high-salt wastewater adsorbed on the sponge layer 131 is transferred to the outer side of the crystallization coating roller 12, forming a uniform high-salt wastewater coating on the outer side of the crystallization coating roller 12.

[0063] As the crystallization coating roller 12 continues to rotate, the part with the high-salt wastewater coating will pass through the first partition plate 171 and enter the crystallization drying chamber 102. The heat from the sunlight will cause the high-salt wastewater coating to evaporate quickly, and after the water evaporates, a thin layer of salt crystals will be left on the crystallization coating roller 12.

[0064] The crystallization coating roller 12 continues to rotate carrying salt crystals and passes through the crystallization scraper 15. Multiple crystallization scrapers 15 scrape off the salt crystals on the surface of the crystallization coating roller 12. The salt crystals will fall into the bottom of the crystallization outer cylinder shell 10 and fall into the crystallization temporary storage shell 16 through multiple crystallization holes 161.

[0065] After the crystallization coating roller 12 rotates once, it returns to the coating shaft 13. The sponge layer 131 is used to coat the outer surface of the crystallization coating roller 12 with a uniform layer of high-salt wastewater. This cycle is repeated to carry out crystallization.

[0066] During the crystallization process of high-salt wastewater, a blower using existing technology introduces dry air into the crystallization drying chamber 102 through the air inlet pipe 181. The air flows along the outer surface of the crystallization coating roller 12 and passes through the flow gap 170 into the coating inlet chamber 101.

[0067] Increasing the airflow rate helps the salt crystallization on the outer surface of the crystallization coating roller 12 to dry faster, and the air introduced can carry away the water vapor generated by the evaporation and crystallization of high-salt wastewater.

[0068] Air carrying water vapor enters the coating input chamber 101 and is then discharged through the ventilation output pipe 182. When the air carrying water vapor flows through the steam condenser pipe 183, it exchanges heat with the cold water in the cooling pool 184, causing the water vapor in the air to liquefy and be discharged into the condensate storage pool 185.

[0069] The condensate in the condensate storage tank 185 must undergo another crystallization process before it can be discharged.

Claims

1. A high-salt wastewater circulating crystallization and drying device, characterized in that, It includes a crystallizing outer shell (10) arranged horizontally along its axis, and a rotating drive shaft (11) coaxial with the crystallizing outer shell (10) is rotatably connected inside the crystallizing outer shell (10), and a crystallizing coating roller (12) is fixed on the rotating drive shaft (11). The outer shell (10) of the crystallization cylinder is rotatably connected to a coating shaft (13) arranged parallel to its axis, and the coating shaft (13) is covered with a sponge layer (131). Inside the crystallization outer shell (10), above the coating shaft (13), a wastewater conveying pipe (14) is fixed, and multiple wastewater nozzles (141) are provided on the lower side of the wastewater conveying pipe (14). Multiple crystallizing scrapers (15) are fixed inside the crystallizing outer shell (10) on the lower side of the crystallizing coating roller (12), and the upper edge of the crystallizing scraper (15) is in contact with the outer surface of the crystallizing coating roller (12). The bottom of the crystallization outer shell (10) is fixed with a crystallization temporary storage shell (16). The crystallization outer shell (10) is connected to the inside of the crystallization temporary storage shell (16) through multiple crystallization leak holes (161). The bottom of the crystallization temporary storage shell (16) has a collection drain pipe (162), and the collection drain pipe (162) has an external discharge control valve (1620).

2. The high-salt wastewater circulating crystallization and drying equipment according to claim 1, characterized in that, The top of the crystallization outer shell (10) is fixed with a first partition plate (171) arranged along its radial plane, and the bottom of the crystallization outer shell (10) is fixed with a second partition plate (172) arranged along its radial plane. The first partition plate (171) and the second partition plate (172) divide the space between the inner wall of the crystallization outer shell (10) and the outer wall of the crystallization coating roller (12) into a coating input chamber (101) and a crystallization drying chamber (102); The coating shaft (13) is disposed in the coating input chamber (101); There is a flow gap (170) between the lower edge of the first partition plate (171) and the upper side of the crystallization coating roller (12); A sealing strip (1720) is provided between the upper edge of the second partition plate (172) and the lower side of the crystallization coating roller (12).

3. The high-salt wastewater circulating crystallization and drying equipment according to claim 2, characterized in that, The outer shell (10) of the crystallization cylinder has a transparent panel (103) on its side wall that communicates with the crystallization drying chamber (102). Multiple reflectors (104) are built on the ground. The reflectors (104) can reflect sunlight and allow sunlight to pass through the transparent panel (103) and shine on the crystallization coating roller (12).

4. The high-salt wastewater circulating crystallization and drying equipment according to claim 2, characterized in that, Multiple air inlet pipes (181) connected to the crystallization drying chamber (102) are fixed on the outside of the crystallization outer shell (10), and multiple air outlet pipes (182) connected to the coating input chamber (101) are fixed on the outside of the crystallization outer shell (10). The ventilation outlet pipe (182) is connected to a vapor condenser pipe (183), which is arranged in a zigzag pattern and immersed in a cooling pool (184); The output end of the steam condenser (183) is connected to a condensate storage tank (185).

5. The high-salt wastewater circulating crystallization and drying equipment according to claim 1, characterized in that, The outer end of the crystallizing outer shell (10) is fixed with a drive housing (19). One end of the rotary drive shaft (11) extends into the interior of the drive housing (19). A driven worm gear (191) is fixed at the end of the rotary drive shaft (11) that extends into the interior of the drive housing (19). A rotary drive motor (192) is fixed inside the drive housing (19). A drive worm (193) is fixed on the output shaft of the rotary drive motor (192). The drive worm (193) is meshed with the driven worm gear (191).

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