A soda ash production waste liquid recovery and treatment device

Abstract

The present invention discloses a device for recycling and treating waste liquid in soda ash production, belonging to the technical field of wastewater treatment. Two groups of water pipes are embedded in a rectangular enclosure. A coil heater is arranged at the bottom of a crystallization tank, and a heat exchange coil is arranged on the side of the crystallization tank. A bearing plate is arranged on the enclosure, and crystallization tray mechanisms are fixedly arranged on both sides of the bearing plate. Return bends are embedded on both sides of the rectangular enclosure. Liquid outlet pipes are arranged on both sides of the crystallization tank, and an electric valve I is arranged on the liquid outlet pipes. A feed pipe is arranged on any one side of both sides of the crystallization tank, and an electric valve II is arranged on the feed pipe. A group of limiting plate members are arranged on the top of the crystallization tank, and the limiting plate members are fixedly connected to the crystallization tank through support rods. A sliding material bin is arranged around the crystallization tank, a discharge port is arranged on the side of the sliding material bin, and the sliding material bin is supported by an inclined support between the sliding material bin and the crystallization tank. It solves the technical problem that the existing operation process of soda ash waste liquid treatment requires complex replacement of the crystallization kettle for two crystallization operations and very cumbersome material cleaning, and is mainly applied to the aspect of wastewater treatment.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and specifically to a device for recycling and treating waste liquid from soda ash production. Background Art

[0002] During the production process of soda ash, a large amount of waste liquid is generated. Its composition is complex, containing various chemical components such as sodium chloride and calcium chloride. If directly discharged without effective treatment, it will cause serious pollution to the environment and cause great damage to the soil, water body and ecological balance. Therefore, the proper treatment of the waste liquid is of great importance.

[0003] For the separation of sodium chloride in the waste liquid, the heating crystallization method can be used. Its principle is based on the characteristic that the solubility of sodium chloride changes relatively insignificantly with temperature. The soda ash waste liquid is placed in a special kettle body and heated. As heat is transferred, the water in the waste liquid continuously evaporates. During this process, the solution is continuously concentrated. When the concentration of sodium chloride reaches its saturation state at the current temperature, further evaporation of water will cause sodium chloride to crystallize out. When the solution is heated to the supersaturated state, sodium chloride crystal particles will begin to form.

[0004] After successfully separating sodium chloride, for the separation of calcium chloride in the mother liquor, the cooling crystallization method can be used. The solubility of calcium chloride has a significant change with temperature, that is, it has a large solubility at high temperatures and a significantly reduced solubility at low temperatures. Since the relative concentration of calcium chloride in the mother liquor after separating sodium chloride is relatively high, when the mother liquor is cooled, as the temperature decreases, the solubility of calcium chloride decreases, and then it gradually crystallizes out from the solution.

[0005] However, there are many problems in the current operation process of soda ash waste liquid treatment. The two crystallization operations require replacing the crystallization kettle, and the whole process is relatively complex. Moreover, the material cleaning process is also very cumbersome, which undoubtedly increases the treatment cost and time cost. In view of this, it is particularly urgent to develop a device that is efficient, stable, low-energy-consuming and can realize the recycling of substances in soda ash production waste liquid. Such a device can not only effectively solve the problem of waste liquid treatment, reduce the negative impact on the environment, but also improve the utilization rate of resources through material recycling, create more economic and environmental benefits for enterprises, and promote the sustainable development of the soda ash industry. Summary of the Invention

[0006] The purpose of the present invention is to provide a device for recycling and treating waste liquid from soda ash production, so as to solve the technical problems in the above-mentioned background art that there are many problems in the existing operation process of soda ash waste liquid treatment, the two crystallization operations require replacing the crystallization kettle, which is complex and the material cleaning is also very cumbersome.

[0007] A soda ash production waste liquid recycling and treatment device, including a crystallization tank, a set of legs are arranged at the bottom of the crystallization tank, a support rod is arranged between the legs, and a linear travel mechanism is arranged at the center of the support rod. It is characterized in that: a rectangular enclosure is arranged through the inside of the crystallization tank, and the linear travel mechanism expands and contracts in the rectangular enclosure. The linear travel mechanism is any one of a ball screw cylinder, a cylinder and an electric push rod. Two sets of water pipes are embedded in the rectangular enclosure, a coil heater is arranged at the bottom of the crystallization tank, a heat exchange coil is arranged on the side of the crystallization tank, a bearing plate is arranged on the rectangular enclosure, the bearing plate is fixedly connected with the linear travel mechanism, and crystallization disk mechanisms are fixedly arranged on both sides of the bearing plate. Return elbows are embedded on both sides of the rectangular enclosure, liquid outlet pipes are arranged on both sides of the crystallization tank, an electric valve I is arranged on the liquid outlet pipe, a feed pipe is arranged on any one side of both sides of the crystallization tank, an electric valve II is arranged on the feed pipe, a set of limit plate parts are arranged on the top of the crystallization tank, and the limit plate parts are fixedly connected with the crystallization tank through support rods. A sliding material bin is arranged around the crystallization tank, the bottom of the sliding material bin is in a slope shape, a discharge port is arranged on the side of the sliding material bin, and the sliding material bin is supported by an inclined support between the sliding material bin and the crystallization tank.

[0008] Preferably, the crystallization disk mechanism includes a vertical side plate, an upper filter disk, a sliding disk and a pin shaft part. A chute is arranged on the upper filter disk, a sliding rod is arranged on the inner side of the sliding disk, and the sliding rod slides in the chute. The upper filter disk and the vertical side plate are rotationally connected through the pin shaft part, and the upper filter disk and the vertical side plate are pulled by an elastic band. A set of water through holes are arranged on both the upper filter disk and the sliding disk.

[0009] Preferably, a sliding rod is arranged through the center of the limit plate part, a pressing plate is arranged at the bottom of the sliding rod, a limit block is arranged at the top of the sliding rod, and a set of electromagnet blocks are arranged at the bottom of the limit plate part.

[0010] Preferably, an ammonia filtration and adsorption cover is arranged on the top of the crystallization tank. The ammonia filtration and adsorption cover is communicated with a filtration kettle through a suction pipe, and a suction pump is arranged on the suction pipe. The suction pump works to suck the ammonia generated during the heating process into the filtration kettle for filtration and recycling.

[0011] Compared with the prior art, the technical effects and advantages of the present invention are:

[0012] In the field of soda ash production waste liquid treatment, the present invention designs a crystallization disk mechanism and a sliding material bin, which can meet the batch precipitation of sodium chloride crystal particles and calcium chloride crystal particles, ensure the comprehensiveness of waste liquid treatment, and at the same time can meet crystal separation and crystal discharging. Compared with the prior art, the present invention avoids the cumbersome and time-consuming step of separately carrying out crystallization reaction of mother liquor in a reaction kettle, greatly simplifies the crystal discharging process, reduces the equipment investment cost and unnecessary consumption of energy, and significantly improves the production efficiency. It also facilitates the cleaning of materials, which is efficient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional view of the present invention;

[0014] Figure 2 Stereogram of the production state of the present invention;

[0015] Figure 3 Stereogram of the present invention with the material sliding bin and heat exchange coil removed;

[0016] Figure 4 Plan view of the internal structure of the present invention;

[0017] Figure 5 For the present invention Figure 4 Enlarged view at position A of the present invention;

[0018] Figure 6 For the present invention Figure 3 Stereogram of the present invention with the crystallization tank part removed;

[0019] Figure 7 Stereogram of the rectangular enclosure of the present invention;

[0020] Figure 8 For the present invention Figure 4 Plan view of the internal structure of the present invention with the sliding rod, pressing plate, limiting block and electromagnet block removed;

[0021] Figure 9 Plan view of the internal structure during the liquid discharging process of the present invention;

[0022] Figure 10 Internal plan view of the present invention for endowing the pressing plate with gravitational potential energy;

[0023] Figure 11 Internal plan view of the present invention when preparing to fall and strike;

[0024] Figure 12 Internal plan view of the present invention in the material turning state;

[0025] Figure 13 For the present invention Figure 12 Enlarged view at position B of the present invention.

[0026] In the figure: 1. Crystallization tank; 10. Return bend pipe; 11. Leg; 12. Support rod; 13. Linear stroke mechanism; 14. Rectangular enclosure; 15. Water pipe; 16. Coil heater; 17. Heat exchange coil; 18. Bearing plate; 2. Liquid discharge pipe; 20. Electric valve I; 21. Feed pipe; 22. Electric valve II; 23. Limiting plate member; 24. Rod; 25. Material sliding bin; 26. Discharge port; 27. Inclined support; 3. Crystallization disc mechanism; 31. Vertical side plate; 32. Upper filter disc; 33. Sliding disc; 34. Pin shaft member; 35. Chute; 36. Slide bar; 37. Elastic band; 38. Water through hole 51. Sliding rod; 52. Pressing plate; 53. Limiting block; 54. Electromagnet block. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] In one embodiment, referring to Figures 1 to 8 , a recovery and treatment device for waste liquid in soda ash production includes a crystallization tank 1. A group of legs 11 are arranged at the bottom of the crystallization tank 1. A support rod 12 is arranged between the legs 11. A linear travel mechanism 13 is arranged at the central position of the support rod 12. It is characterized in that: a rectangular enclosure 14 is arranged through the inside of the crystallization tank 1. The linear travel mechanism 13 expands and contracts in the rectangular enclosure 14. The linear travel mechanism 13 is any one of a ball screw cylinder, a cylinder, and an electric push rod. Two water pipes 15 are embedded in the rectangular enclosure 14. A coil heater 16 is arranged at the bottom of the crystallization tank 1. A heat exchange coil 17 is arranged on the side of the crystallization tank 1. A bearing plate 18 is arranged on the rectangular enclosure 14. The bearing plate 18 is fixedly connected to the linear travel mechanism 13. Crystallization disk mechanisms 3 are fixedly arranged on both sides of the bearing plate 18. Return elbows 10 are embedded on both sides of the rectangular enclosure 14. Liquid outlet pipes 2 are arranged on both sides of the crystallization tank 1. An electric valve 20 is arranged on the liquid outlet pipe 2. A feed pipe 21 is arranged on any one side of the two sides of the crystallization tank 1. An electric valve 22 is arranged on the feed pipe 21. A group of limit plate members 23 are arranged at the top of the crystallization tank 1. A sliding rod 51 is arranged through the center of the limit plate members 23. A pressing plate 52 is arranged at the bottom of the sliding rod 51. A limit block 53 is arranged at the top of the sliding rod 51. An electromagnet block 54 is arranged at the bottom of the limit plate members 23. The limit plate members 23 are fixedly connected to the crystallization tank 1 through a support rod 24. A sliding material bin 25 is arranged around the crystallization tank 1. The bottom of the sliding material bin 25 is in a slope shape. A discharge port 26 is arranged on the side of the sliding material bin 25. The sliding material bin 25 is supported by an inclined support 27 between it and the crystallization tank 1.

[0029] In one embodiment, referring to Figures 4 to 8 , the crystallization disk mechanism 3 includes a vertical side plate 31, an upper filter disk 32, a sliding disk 33, and a pin shaft member 34. A chute 35 is arranged on the upper filter disk 32. A sliding rod 36 is arranged on the inner side of the sliding disk 33. The sliding rod 36 slides in the chute 35. The upper filter disk 32 is rotatably connected to the vertical side plate 31 through the pin shaft member 34. The upper filter disk 32 and the vertical side plate 31 are pulled by an elastic band 37. A group of water through holes 38 are arranged on both the upper filter disk 32 and the sliding disk 33.

[0030] In one embodiment, referring to Figures 1 to 7, Sodium chloride crystal crystallization operation: The waste liquid from soda ash production is pumped into the crystallization tank 1 through the feed pipe 21. The mother liquor flows to both sides of the rectangular enclosure 14 through the water pipe 15. The heat exchange coil 17 is heated by hot water for heat exchange, and at the same time, the coil heater 16 is heated to raise the temperature of the mother liquor. The linear stroke mechanism 13 expands and contracts with a back-and-forth amplitude of ±10 cm to stir the internal mother liquor. After 5 minutes, the linear stroke mechanism 13 retracts to its original position, and sodium chloride begins to crystallize on the upper filter plate 32 of the crystallization plate mechanism 3. After waiting for one hour, referring to Figure 9 , The sodium chloride crystal particles are basically precipitated. The linear stroke mechanism 13 works to lift the sodium chloride crystal particles and the mother liquor together. As the linear stroke mechanism 13 rises, the mother liquor flows back to the bottom of the crystallization tank 1 through the return bend pipe 10, and the sodium chloride crystal particles mixed with a little mother liquor drain down through the water holes 38. Referring to Figure 12 , As the linear stroke mechanism 13 continues to rise, the upper filter plate 32 abuts against the limit plate member 23 to form a slope, and the sliding plate 33 at the bottom of the upper filter plate 32 slides and unfolds from the upper filter plate 32. The sodium chloride crystal particles in the upper filter plate 32 slide along the upper filter plate 32 and the sliding plate 33 into the sliding material bin 25 and enter the collection link through the discharge port 26. The linear stroke mechanism 13 abuts upward multiple times to remove the sodium chloride crystal particles in the upper filter plate 32. Referring to Figure 1 and Figure 12 , After the operation, the sliding plate 33 is manually pushed back to the bottom of the upper filter plate 32, and at the same time, the sodium chloride crystal particles inside the sliding material bin 25 are cleaned;

[0031] Subsequently, the calcium chloride crystallization operation is entered. The heat exchange coil 17 is cooled by cold water for heat exchange, and at the same time, the coil heater 16 stops heating to cool the mother liquor remaining inside the crystallization tank 1 to prepare for the precipitation of calcium chloride crystal particles. The remaining working steps are the same as those of the above sodium chloride crystal crystallization operation.

[0032] In one embodiment, referring to Figures 1 to 8 , The waste liquid from soda ash production is pumped into the crystallization tank 1 through the feed pipe 21. The mother liquor flows to both sides of the rectangular enclosure 14 through the water pipe 15. The heat exchange coil 17 is heated by hot water for heat exchange, and at the same time, the coil heater 16 is heated to raise the temperature of the mother liquor. The linear stroke mechanism 13 expands and contracts with a back-and-forth amplitude of ±10 cm to stir the internal mother liquor. After 5 minutes, the linear stroke mechanism 13 retracts to its original position, and sodium chloride begins to crystallize on the upper filter plate 32 of the crystallization plate mechanism 3. After waiting for one hour, the sodium chloride crystal particles are basically precipitated. The linear stroke mechanism 13 works to lift the sodium chloride crystal particles and the mother liquor together. As the linear stroke mechanism 13 rises, the mother liquor flows back to the bottom of the crystallization tank 1 through the return bend pipe 10, and a little mother liquor at the bottom of the sodium chloride crystal particles drains down through the water holes 38. Referring to Figure 10 and Figure 11, as the linear stroke mechanism 13 ascends and passes through contact with the pressing plate 52, the large sodium chloride crystal particles in the upper filter plate 32 are crushed, and the internal mother liquor drains down through the water passing holes 38. The linear stroke mechanism 13 continues to ascend and drives the pressing plate 52 to contact the bottom of the limit plate member 23. The electromagnet block 54 at the bottom of the limit plate member 23 is energized, adsorbing the pressing plate 52 to the bottom of the limit plate member 23. Subsequently, the linear stroke mechanism 13 retracts by 15 cm - 25 cm. The upper filter plate 32 is inside the crystallization tank 1. The power supply of the electromagnet block 54 is disconnected, and the pressing plate 52 falling back and pressing on the upper filter plate 32 has a better effect. As the linear stroke mechanism 13 continues to ascend, the upper filter plate 32 abuts against the limit plate member 23 to form a slope, and the sliding plate 33 at the bottom of the upper filter plate 32 slides and unfolds from the upper filter plate 32. The sodium chloride crystal particles in the upper filter plate 32 slide along the upper filter plate 32 and the sliding plate 33 into the sliding material bin 25 and enter the collection link through the discharge port 26. The linear stroke mechanism 13 abuts upwards multiple times to remove the sodium chloride crystal particles in the upper filter plate 32. After the operation, the sliding plate 33 is manually pushed back to the bottom of the upper filter plate 32, and meanwhile, the sodium chloride crystal particles inside the sliding material bin 25 are cleaned up;

[0033] Subsequently, calcium chloride crystallization operation is carried out. The heat exchange coil 17 is cooled by passing cold water, and at the same time, the coil heater 16 stops heating to cool down the mother liquor remaining inside the crystallization tank 1 to prepare for the precipitation of calcium chloride crystal particles. The remaining working steps are the same as those of the above-mentioned sodium chloride crystal crystallization operation.

[0034] In one embodiment, referring to Figure 2 , an ammonia filtering and adsorbing hood 71 is arranged at the top of the crystallization tank 1. The ammonia filtering and adsorbing hood 71 is communicated with the filtering kettle 73 through a suction pipe 74. A suction pump 72 is arranged on the suction pipe 74. When the suction pump 72 works, the ammonia generated during the heating process is sucked into the filtering kettle 73 through the filtering and adsorbing hood 71 for filtering and recycling.

[0035] The above description is only the specific implementation manner of the present invention, but the present invention is not limited thereto. Without obvious improvement or replacement made on this basis, it belongs to the protection scope of the present invention.

Claims

1. A soda ash production waste liquid recovery and treatment device, comprising a crystallization box (1), a group of legs (11) are arranged at the bottom of the crystallization box (1), support rods (12) are arranged between the legs (11), and a linear travel mechanism (13) is arranged at the center of the support rod (12), characterized in that: A rectangular enclosure (14) is arranged inside the crystallization box (1), the linear travel mechanism (13) is extended and retracted in the rectangular enclosure (14), two groups of water pipes (15) are embedded in the rectangular enclosure (14), a coil heater (16) is arranged at the bottom of the crystallization box (1), a heat exchange coil (17) is arranged on the side of the crystallization box (1), a support plate (18) is arranged on the rectangular enclosure (14), the support plate (18) is fixedly connected to the linear travel mechanism (13), a crystallization plate mechanism (3) is fixedly arranged on both sides of the support plate (18), a reflux elbow (10) is embedded in both sides of the rectangular enclosure (14), and both sides of the crystallization box (1) are provided with a heat exchange coil (17). A liquid outlet pipe (2) is provided, and an electric valve 1 (20) is provided on the liquid outlet pipe (2); a feed pipe (21) is provided on either side of the crystallization box (1), and an electric valve 2 (22) is provided on the feed pipe (21); a group of limit plates (23) are provided on the top of the crystallization box (1), and the limit plates (23) are fixedly connected to the crystallization box (1) through a support rod (24); a sliding bin (25) is provided around the crystallization box (1), and the bottom of the sliding bin (25) is sloped, and a discharge port (26) is provided on the side of the sliding bin (25); and the sliding bin (25) and the crystallization box (1) are supported by an inclined bracket (27); The crystallization disk mechanism (3) comprises a vertical side plate (31), an upper filter disk (32), a sliding disk (33) and a pin shaft (34); a slide groove (35) is arranged on the upper filter disk (32); a slide rod (36) is arranged inside the sliding disk (33); the slide rod (36) slides in the slide groove (35); the upper filter disk (32) and the vertical side plate (31) are rotatably connected via the pin shaft (34); the upper filter disk (32) and the vertical side plate (31) are pulled via an elastic band (37); and a group of water holes (38) are arranged on the upper filter disk (32) and the sliding disk (33); A sliding rod (51) is arranged through the center of the limiting plate (23), a pressing plate (52) is arranged at the bottom of the sliding rod (51), a limiting block (53) is arranged at the top of the sliding rod (51), and a group of electromagnet blocks (54) are arranged at the bottom of the limiting plate (23).

2. The soda ash production waste liquid recovery and treatment equipment according to claim 1, characterized in that: The linear travel mechanism (13) is any one of a ball screw, a cylinder and an electric push rod.

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