Sodium carbonate production waste liquid recovery treatment equipment

Abstract

The invention discloses sodium carbonate production waste liquid recovery treatment equipment, and belongs to the technical field of wastewater treatment. Two groups of water passing pipes are embedded in a rectangular fence, a coil heater is arranged at the bottom of a crystallization box, a heat exchange coil is arranged on the side edge of the crystallization box, a bearing plate is arranged on the fence, crystallization disc mechanisms are fixedly arranged on the two sides of the bearing plate, and backflow bent pipes are embedded in the two sides of the rectangular fence; liquid outlet pipes are arranged on the two sides of the crystallization box, first electric valves are arranged on the liquid outlet pipes, a feeding pipe is arranged on any one of the two sides of the crystallization box, second electric valves are arranged on the feeding pipe, a set of limiting plates are arranged at the top of the crystallization box and fixedly connected with the crystallization box through supporting rods, a material sliding bin is arranged on the periphery of the crystallization box, and a discharging port is formed in the side edge of the material sliding bin. And the sliding bin and the crystallization box are supported by an inclined bracket. The technical problems that the crystallization kettle needs to be replaced for two times of crystallization operation in the existing operation process of sodium carbonate waste liquid treatment and the materials are very tedious to clean are solved, and the device is mainly applied to wastewater treatment.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a soda ash production waste liquid recovery and treatment device. Background Art

[0002] A large amount of waste liquid is generated during the production of soda ash. Its composition is complex and contains multiple chemical components such as sodium chloride and calcium chloride. If it is discharged directly without effective treatment, it will cause serious pollution to the environment and cause great damage to the soil, water bodies and ecological balance. Therefore, proper treatment of waste liquid is very important.

[0003] For the separation of sodium chloride from waste liquid, the heating crystallization method can be used. Its principle is based on the fact that the solubility of sodium chloride does not change significantly with temperature. The soda ash waste liquid is placed in a special kettle and heated. As the heat is transferred, the water in the waste liquid continues to evaporate. In 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 the sodium chloride to crystallize. When the solution is heated to a supersaturated state, sodium chloride crystal particles will begin to form.

[0004] After successfully separating sodium chloride, the cooling crystallization method can be used to separate calcium chloride from the mother liquor. The solubility of calcium chloride has the characteristic of changing significantly with temperature, that is, the solubility is greater at high temperatures, while the solubility is significantly reduced at low temperatures. Since the relative concentration of calcium chloride in the mother liquor after separating sodium chloride is high, when the mother liquor is cooled, as the temperature decreases, the solubility of calcium chloride decreases, and then gradually crystallizes out of the solution.

[0005] However, there are many problems in the current operation process of soda ash waste liquid treatment. The whole process of replacing the crystallization kettle for two crystallization operations is relatively complicated, and the material cleaning process is also very cumbersome, which undoubtedly increases the processing cost and time cost. In view of this, it is particularly urgent to develop an efficient, stable, low-energy consumption equipment that can recycle waste liquid materials in soda ash production. Such equipment can not only effectively solve the problem of waste liquid treatment and reduce the negative impact on the environment, but also improve the utilization rate of resources through material recovery, 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 soda ash production waste liquid recovery and treatment equipment to solve the many problems in the existing soda ash waste liquid treatment operation process mentioned in the above background technology, the technical problems that the two crystallization operations require complex replacement of the crystallization kettle and the material cleaning is also very cumbersome.

[0007] A soda ash production waste liquid recovery and treatment equipment comprises a crystallization box, a group of legs are arranged at the bottom of the crystallization box, support rods are arranged between the legs, and a linear stroke mechanism is arranged at the center position of the support rod. The invention is characterized in that a rectangular enclosure is arranged through the inside of the crystallization box, the linear stroke mechanism is extended and retracted in the rectangular enclosure, the linear stroke mechanism is any one of a ball screw cylinder, a cylinder and an electric push rod, two groups of water pipes are embedded in the rectangular enclosure, a coil heater is arranged at the bottom of the crystallization box, a heat exchange coil is arranged on the side of the crystallization box, a support plate is arranged on the rectangular enclosure, the support plate is fixedly connected to the linear stroke mechanism, a crystallization disk mechanism is fixedly arranged on both sides of the support plate, a reflux elbow is embedded on both sides of the rectangular enclosure, a liquid outlet pipe is arranged on both sides of the crystallization box, an electric valve 1 is arranged on the liquid outlet pipe, a feed pipe is arranged on any one side of the two sides of the crystallization box, an electric valve 2 is arranged on the feed pipe, a group of limit plates are arranged on the top of the crystallization box, the limit plates are fixedly connected to the crystallization box through the support rod, a sliding bin is arranged around the crystallization box, the bottom of the sliding bin is sloped, a discharge port is arranged on the side of the sliding bin, and an oblique bracket supports the sliding bin and the crystallization box.

[0008] Preferably, the crystallization disk mechanism includes a vertical side plate, an upper filter plate, a sliding plate and a pin shaft member, a slide groove is arranged on the upper filter plate, a sliding rod is arranged on the inner side of the sliding plate, the sliding rod slides in the slide groove, the upper filter plate and the vertical side plate are rotatably connected by a pin shaft member, the upper filter plate and the vertical side plate are pulled by an elastic belt, and a group of water holes are arranged on the upper filter plate and the sliding plate.

[0009] Preferably, a sliding rod is arranged through the center of the limiting plate, a pressure plate is arranged at the bottom of the sliding rod, a limiting block is arranged at the top of the sliding rod, and a group of electromagnet blocks are arranged at the bottom of the limiting plate.

[0010] Preferably, an ammonia filter adsorption hood is arranged on the top of the crystallization box, and the ammonia filter adsorption hood is connected to the filter kettle through a suction pipe. A suction pump is arranged on the suction pipe. The suction pump sucks the ammonia generated during the heating process into the filter kettle for filtration and recovery.

[0011] Compared with the prior art, the technical effects and advantages of the present invention are: In the field of soda ash production waste liquid treatment, the present invention designs a crystallization disk mechanism and a sliding 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 can meet the crystal separation and crystal discharging. Compared with the prior art, the present invention avoids the cumbersome and time-consuming step of the mother liquor being required to undergo crystallization reaction in the reactor separately, greatly simplifies the crystal discharging process, reduces the equipment investment cost and unnecessary energy consumption, and significantly improves production efficiency. It also facilitates the cleaning of materials, which is efficient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A perspective view of the present invention; Figure 2 It is a three-dimensional diagram of the production state of the present invention; Figure 3 This is a stereoscopic diagram of the present invention without the sliding bin and the heat exchange coil; Figure 4 It is a plan view of the internal structure of the present invention; Figure 5 For the present invention Figure 4 A magnified image of point A; Figure 6 For the present invention Figure 3 A three-dimensional image without the crystallization box; Figure 7 It is a three-dimensional diagram of a rectangular enclosure of the present invention; Figure 8 For the present invention Figure 4 The internal structure plan view without the sliding rod, pressure plate, limit block and electromagnet block; Fig. 9 It is a plan view of the internal structure of the liquid discharge process of the present invention; Fig.10 It is an internal plane diagram of the present invention that imparts gravitational potential energy to the pressing plate; Fig.11 The internal plan view when the preparation for the present invention is dropped and struck; Fig.12 This is an internal plan view of the material turning state of the present invention; Fig.13 For the present invention Fig.12 Enlarged view of point B.

[0013] In the figure: 1. crystallization box; 10. reflux elbow; 11. support leg; 12. support rod; 13. linear travel mechanism; 14. rectangular enclosure; 15. water pipe; 16. coil heater; 17. heat exchange coil; 18. support plate; 2. liquid outlet pipe; 20. electric valve 1; 21. feed pipe; 22. electric valve 2; 23. limit plate; 24. rod; 25. sliding bin; 26. discharge port; 27. inclined bracket; 3. crystallization plate mechanism; 31. vertical side plate; 32. upper filter plate; 33. sliding plate; 34. pin shaft; 35. slide groove; 36. slide rod; 37. elastic belt; 38. water hole 51. slide rod; 52. pressure plate; 53. limit block; 54. electromagnet block. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] In one embodiment, referring to Figures 1 to 8A soda ash production waste liquid recovery and treatment equipment comprises a crystallization box 1, a group of legs 11 are arranged at the bottom of the crystallization box 1, a support rod 12 is arranged between the legs 11, and a linear stroke mechanism 13 is arranged at the center of the support rod 12, which is characterized in that a rectangular enclosure 14 is arranged through the inside of the crystallization box 1, and the linear stroke mechanism 13 is telescopic in the rectangular enclosure 14, and the linear stroke mechanism 13 is any one of a ball screw cylinder, a cylinder and an electric push rod. 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, and 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, and the support plate 18 is fixedly connected to the linear stroke mechanism 13. Crystallization disk mechanisms 3 are fixedly arranged on both sides of the support plate 18. A reflux elbow 10 is embedded on both sides of the shaped enclosure 14, a liquid outlet pipe 2 is arranged on both sides of the crystallization box 1, an electric valve 1 20 is arranged on the liquid outlet pipe 2, a feed pipe 21 is arranged on either side of the crystallization box 1, an electric valve 2 22 is arranged on the feed pipe 21, a group of limit plates 23 is arranged on the top of the crystallization box 1, a sliding rod 51 is arranged through the center of the limit plate 23, a pressure plate 52 is arranged at the bottom of the sliding rod 51, a limit block 53 is arranged on the top of the sliding rod 51, a group of electromagnet blocks 54 are arranged at the bottom of the limit plate 23, the limit plate 23 is fixedly connected to the crystallization box 1 through the support rod 24, a sliding bin 25 is arranged around the crystallization box 1, the bottom of the sliding bin 25 is sloped, a discharge port 26 is arranged on the side of the sliding bin 25, and the sliding bin 25 and the crystallization box 1 are supported by an oblique bracket 27.

[0016] In one embodiment, referring to Figures 4 to 8 The crystallization disk mechanism 3 includes a vertical side plate 31, an upper filter plate 32, a sliding plate 33 and a pin shaft 34. A slide groove 35 is arranged on the upper filter plate 32. A sliding rod 36 is arranged on the inner side of the sliding plate 33. The sliding rod 36 slides in the slide groove 35. The upper filter plate 32 is rotatably connected to the vertical side plate 31 through the pin shaft 34. The upper filter plate 32 and the vertical side plate 31 are pulled by an elastic belt 37. A group of water holes 38 are arranged on the upper filter plate 32 and the sliding plate 33.

[0017] In one embodiment, referring to Figures 1 to 7 , sodium chloride crystal crystallization operation: soda ash production waste liquid is pumped into the crystallization box 1 through the feed pipe 2, 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, and the coil heater 16 is heated at the same time, so that the temperature of the mother liquor rises, the linear stroke mechanism 13 is extended and retracted by ±10cm, stirring the internal mother liquor, and the linear stroke mechanism 13 retracts to the original position after 5 minutes, and sodium chloride begins to crystallize on the upper filter plate 32 of the crystallization plate mechanism 3. After waiting for one hour, refer to Fig. 9, sodium chloride crystal particles are basically precipitated, and 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 box 1 through the reflux elbow 10, and the sodium chloride crystal particles mixed with a little mother liquor flow down through the water hole 38. Fig.12 As the linear travel mechanism 13 continues to rise, the upper filter disc 32 abuts against the limiting plate 23 to form a slope, and the sliding disc 33 at the bottom of the upper filter disc 32 slides and unfolds from the upper filter disc 32. The sodium chloride crystal particles in the upper filter disc 32 slide along the upper filter disc 32 and the sliding disc 33 into the sliding bin 25 and enter the collection link from the discharge port 26. The linear travel mechanism 13 abuts against the upper filter disc 32 several times to remove the sodium chloride crystal particles in the upper filter disc 32. Figure 1 and Fig.12 After the end, the sliding plate 33 is manually pushed back to the bottom of the upper filter plate 32, and the sodium chloride crystal particles inside the sliding bin 25 are cleaned; Then, the calcium chloride crystallization operation is started, and the heat exchange coil 17 is passed through cold water for heat exchange. At the same time, the coil heater 16 stops heating, and the mother liquor retained in the crystallization box 1 is cooled to prepare for the precipitation of calcium chloride crystal particles. The remaining working steps are the same as the above-mentioned sodium chloride crystal crystallization operation.

[0018] In one embodiment, referring to Figures 1 to 8 , the soda ash production waste liquid is pumped into the crystallization box 1 through the feed pipe 2, and the mother liquor flows to the two 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 the coil heater 16 is heated at the same time, so that the temperature of the mother liquor rises, and the linear stroke mechanism 13 is extended and retracted by ±10cm to stir the internal mother liquor. After 5 minutes, the linear stroke mechanism 13 retracts to the initial 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, and 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 box 1 through the reflux elbow 10, and a small amount of mother liquor at the bottom of the sodium chloride crystal particles is drained through the water hole 38. Fig.10 and Fig.11As the linear travel mechanism 13 rises and contacts the pressing plate 52, the large sodium chloride crystal particles in the upper filter disc 32 are broken, and the mother liquor inside is drained from the water hole 38. The linear travel mechanism 13 continues to rise and drives the pressing plate 52 to contact the bottom of the limit plate 23. The electromagnet block 54 at the bottom of the limit plate 23 is energized, and the pressing plate 52 is adsorbed on the bottom of the limit plate 23. Then the linear travel mechanism 13 retracts 15cm-25cm, and the upper filter disc 32 is inside the crystallization box 1. The power supply of the electromagnet block 54 is disconnected, and the pressing plate 52 falls back and presses on the upper filter disc 32. Better yet, as the linear travel mechanism 13 continues to rise, the upper filter disc 32 abuts against the limiting plate 23 to form a slope, and the sliding disc 33 at the bottom of the upper filter disc 32 slides and unfolds from the upper filter disc 32, and the sodium chloride crystal particles in the upper filter disc 32 slide along the upper filter disc 32 and the sliding disc 33 into the sliding bin 25, and enter the collection link from the discharge port 26, and the linear travel mechanism 13 abuts multiple times to remove the sodium chloride crystal particles in the upper filter disc 32, and after the end, the sliding disc 33 is manually pushed back to the bottom of the upper filter disc 32, and the sodium chloride crystal particles inside the sliding bin 25 are cleaned; Then, the calcium chloride crystallization operation is started, and the heat exchange coil 17 is passed through cold water for heat exchange. At the same time, the coil heater 16 stops heating, and the mother liquor retained in the crystallization box 1 is cooled to prepare for the precipitation of calcium chloride crystal particles. The remaining working steps are the same as the above-mentioned sodium chloride crystal crystallization operation.

[0019] In one embodiment, referring to Figure 2 An ammonia filter adsorption hood 71 is arranged on the top of the crystallization box 1. The ammonia filter adsorption hood 71 is connected to the filter 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 filter kettle 73 through the filter adsorption hood 71 for filtration and recovery.

[0020] The above is only a specific implementation mode of the present invention, but the present invention is not limited thereto. Any non-obvious improvements and replacements made on this basis shall fall within 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 the two sides of the crystallization box (1) are provided with a plurality of heat exchangers (17). A liquid outlet pipe (2) is arranged on the side, an electric valve 1 (20) is arranged on the liquid outlet pipe (2), a feed pipe (21) is arranged on either side of the two sides of the crystallization box (1), an electric valve 2 (22) is arranged on the feed pipe (21), a group of limit plates (23) are arranged on the top of the crystallization box (1), the limit plates (23) are fixedly connected to the crystallization box (1) through a support rod (24), a sliding bin (25) is arranged around the crystallization box (1), the bottom of the sliding bin (25) is in a slope shape, a discharge port (26) is arranged on the side of the sliding bin (25), and an inclined bracket (27) is provided between the sliding bin (25) and the crystallization box (1).

2. The soda ash production waste liquid recovery and treatment equipment according to claim 1, characterized in that: The crystallization disk mechanism (3) comprises a vertical side plate (31), an upper filter disk (32), a sliding disk (33) and a pin shaft member (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) is rotatably connected to the vertical side plate (31) via the pin shaft member (34). The upper filter disk (32) and the vertical side plate (31) are pulled via an elastic band (37). A group of water holes (38) are arranged on both the upper filter disk (32) and the sliding disk (33).

3. The soda ash production waste liquid recovery and treatment equipment according to claim 1, characterized in that: 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).

4. 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 cylinder, a pneumatic cylinder and an electric push rod.

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