Vacuum evaporation equipment for nickel-containing wastewater

Abstract

The utility model relates to nickel-containing wastewater vacuum evaporation equipment, and belongs to the field of nickel-containing wastewater treatment.The nickel-containing wastewater vacuum evaporation equipment comprises a treatment box, a wastewater feeding mechanism, a vacuum evaporation mechanism and a collection mechanism, and the wastewater feeding mechanism comprises a limiting frame, a multi-stage filter, a first water pump, a first water pumping pipe, a first water conveying pipe and a sedimentation tank; and the limiting frame is fixed with the inner wall of the treatment box. According to the nickel-containing wastewater vacuum evaporation equipment, the vacuum evaporation mechanism is adopted for treating nickel-containing wastewater, compared with a traditional method, the treatment cost is reduced, the treatment efficiency is remarkably improved, the evaporation process of the wastewater is effectively accelerated by additionally arranging a stirring structure in the vacuum evaporator, and therefore the evaporation efficiency is further improved; the wastewater treatment effect is optimized, the added pretreatment unit can effectively remove large-particle impurities and grease in the wastewater, better conditions are provided for subsequent treatment, meanwhile, equipment is protected, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of nickel-containing wastewater treatment, and in particular to a nickel-containing wastewater vacuum evaporation device. Background Art

[0002] In the field of environmental engineering and wastewater treatment technology, the treatment of nickel-containing wastewater is a key issue. Although traditional treatment methods such as chemical precipitation, ion exchange, and membrane separation technology can remove nickel ions from wastewater, they are often accompanied by problems such as high treatment costs and possible secondary pollution.

[0003] For example, a nickel-containing wastewater treatment system disclosed in Chinese patent announcement number (CN219341894U) is provided with a water storage tank for storing nickel-containing wastewater, a peristaltic pump is provided on the water inlet pipe, one end of the water inlet pipe is connected to the bottom of the water storage tank, and the other end is connected to the top of an organic glass column, a filler is provided in the organic glass column, a cathode is provided above the filler, and an anode is provided below the filler, the cathode and the anode are connected to an external resistor through a wire, and a water outlet is provided at the bottom of the organic glass column. The utility model treatment system belongs to a resource-saving and environmentally friendly wastewater treatment system, which can reliably treat nickel-containing wastewater, adds MFC technology on the basis of the CW structure, and provides a new way to effectively remove nickel from wastewater.

[0004] At present, the commonly used methods for treating nickel-containing wastewater mainly include chemical precipitation and ion exchange. The chemical precipitation method is to add specific chemical reagents to the wastewater to make the nickel ions react with the reagents to form insoluble precipitates, and then remove the nickel ions by precipitation separation. The ion exchange method uses specific ion exchange resins to exchange the ions on the resin with the nickel ions in the wastewater, thereby achieving the purpose of removing nickel ions.

[0005] Although the existing chemical precipitation method and ion exchange method have certain effects in treating nickel-containing wastewater, they also have obvious defects. The chemical precipitation method may produce a large amount of sludge during the treatment process, which not only increases the difficulty and cost of subsequent treatment, but also may cause secondary pollution. Although the ion exchange method can avoid the generation of sludge, it requires frequent replacement of ion exchange resins, which undoubtedly increases the complexity of operation and treatment cost. Therefore, the existing nickel-containing wastewater treatment methods still need to be improved in terms of high treatment cost, complex operation and possible secondary pollution. Utility Model Content

[0006] In view of the shortcomings of the prior art, the present application provides a nickel-containing wastewater vacuum evaporation equipment, which has the advantages of good nickel-containing wastewater treatment effect, and solves the problems that the existing nickel-containing wastewater treatment methods still need to be improved in terms of high treatment cost, complex operation and possible secondary pollution.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A vacuum evaporation device for nickel-containing wastewater, comprising a treatment box, a wastewater feeding mechanism, a vacuum evaporation mechanism and a collection mechanism;

[0008] The wastewater feeding mechanism comprises a limit frame, a multi-stage filter, a first water pump, a first water pumping pipe, a first water delivery pipe and a sedimentation tank, wherein the limit frame is fixed to the inner wall of the treatment box, the multi-stage filter is plugged into the inside of the limit frame, the first water pump is fixed to the upper surface of the treatment box, one end of the first water pumping pipe is connected to the water inlet end of the first water pump, and the other end of the water pumping pipe is connected to the sedimentation tank, and the first water delivery pipe is connected to the water outlet end of the first water pump;

[0009] The vacuum evaporation mechanism includes a vacuum tank, a rotating shaft, a stirring rod, a stirring motor, a heater, an electric heating pipe, a second water pumping pipe, a second water pump and a second water supply pipe, one end of the second water pumping pipe is connected to the inner bottom wall of the processing box, and the other end of the second water pumping pipe is connected to the second water pump, one end of the second water supply pipe is connected to the water outlet end of the second water pump, and the other end of the second water supply pipe is connected to the vacuum tank, the rotating shaft is rotatably connected between the upper and lower inner walls of the vacuum tank through a bearing, the stirring rod is fixed to the outside of the rotating shaft, the stirring motor is fixed to the upper surface of the vacuum tank, and the outside of the stirring motor output shaft is fixed to the rotating shaft, the heater is fixed to the bottom of the vacuum tank, the electric heating pipe is fixed to the inner wall of the vacuum tank, and the electric heating pipe and the heater are electrically connected through a wire.

[0010] By adopting this technical solution, efficient treatment of wastewater and recovery of nickel salts can be achieved.

[0011] Furthermore, the bottom end of the first water supply pipe penetrates and extends to the inner wall of the processing box and is located above the multi-stage filter.

[0012] By adopting this technical solution, wastewater can pass through the multi-stage filter more evenly, thereby improving the filtration efficiency and wastewater treatment quality.

[0013] Furthermore, the number of the stirring rods is not less than two, and they are evenly distributed along the length direction of the rotating shaft.

[0014] By adopting this technical solution, wastewater can be stirred more effectively, the evaporation process can be accelerated, and the evaporation efficiency can be improved.

[0015] Furthermore, a vacuum pump is fixed on the back of the vacuum tank, and a vacuum tube connected to the inner wall of the vacuum tank is fixed on the input end of the vacuum pump.

[0016] By adopting this technical solution, the vacuum environment required for the evaporation process is effectively maintained by connecting the vacuum tube to the inner wall of the vacuum tank, thereby promoting the evaporation of wastewater.

[0017] Furthermore, the collecting mechanism includes an air-cooled condenser, a steam inlet pipe, a condensed water pipe, a condensed water collecting tank, a collecting frame, a crystallizer, a centrifuge, a dryer and a nickel salt collecting piece. The air-cooled condenser is fixed to the outside of the vacuum tank, the steam inlet pipe is connected to the input end of the air-cooled condenser, one end of the condensed water pipe is connected to the output end of the air-cooled condenser, and the other end of the condensed water pipe is connected to the condensed water collecting tank, the collecting frame is fixed to the outside of the condensed water collecting tank, the crystallizer is fixed to the inside of the collecting frame, the centrifuge is fixed to the outside of the crystallizer, the dryer is fixed to the outside of the centrifuge, and the nickel salt collecting piece is arranged on the outside of the collecting frame to extract the nickel salt remaining after evaporation and introduce it into the collecting mechanism for further processing.

[0018] By adopting this technical solution, it is possible to separate and collect condensed water and concentrated nickel salt after wastewater evaporation, as well as further process and recover the nickel salt.

[0019] Furthermore, the nickel salt collecting component includes a material pump, a drawing pipe and a feeding pipe, the material pump is fixed to the upper surface of the collecting frame, one end of the drawing pipe is connected to the feeding end of the material pump, and the other end of the drawing pipe is connected to the inner bottom wall of the vacuum tank, one end of the feeding pipe is connected to the discharging end of the material pump, and the other end of the feeding pipe passes through and extends to the interior of the crystallizer.

[0020] By adopting this technical solution, the nickel salt remaining after evaporation can be effectively extracted from the vacuum tank and sent to the crystallizer, which facilitates the subsequent nickel salt processing and recovery.

[0021] Furthermore, a control valve is fixed on the outer side of the extraction pipe.

[0022] By adopting this technical solution, the flow of the slurry can be accurately controlled, improving the controllability of the system and the flexibility of operation.

[0023] Furthermore, a drain pipe is connected to the lower part of the outer side of the condensate collection tank.

[0024] By adopting this technical solution, the treated water can be discharged conveniently, the maintenance workload of the system can be reduced, and the operating efficiency of the system can be improved.

[0025] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0026] 1. The nickel-containing wastewater vacuum evaporation equipment adopts a vacuum evaporation mechanism to treat nickel-containing wastewater. Compared with traditional methods, it not only reduces the treatment cost, but also significantly improves the treatment efficiency. By adding a stirring structure inside the vacuum evaporator, the evaporation process of the wastewater is effectively accelerated, thereby further enhancing the evaporation efficiency and optimizing the wastewater treatment effect. The added pretreatment unit can effectively remove large particles of impurities and grease in the wastewater, providing better conditions for subsequent treatment, while also protecting the equipment and extending its service life.

[0027] 2. The introduction of the nickel salt recovery unit in the nickel-containing wastewater vacuum evaporation equipment makes it possible to recover nickel salts from concentrated nickel salt solutions, which not only improves the recycling rate of resources, but also effectively reduces the possible pollution to the environment. The overall operation of this technical solution is simple, maintenance is convenient, and it performs well in environmental protection. Therefore, it has extremely high practicality and broad prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of this application;

[0029] Figure 2 This is a schematic diagram of the wastewater feeding mechanism for this application;

[0030] Figure 3 This is a partial schematic diagram of the wastewater feeding mechanism of this application;

[0031] Figure 4 This is a schematic diagram of the vacuum evaporation mechanism of this application;

[0032] Figure 5 A schematic diagram of the collection organization for this application.

[0033] In the figure: 1. treatment box; 2. wastewater feeding mechanism; 21. limit frame; 22. multi-stage filter; 23. first water pump; 24. first water extraction pipe; 25. first water delivery pipe; 26. sedimentation tank; 3. vacuum evaporation mechanism; 31. vacuum tank; 32. rotating shaft; 33. stirring rod; 34. stirring motor; 35. heater; 36. electric heating tube; 37. second water extraction pipe; 38. second water pump; 39. second water delivery pipe; 4. collecting mechanism; 41. air-cooled condenser; 42. steam inlet pipe; 43. condensate pipe; 44. condensate collecting tank; 45. collecting frame; 46. crystallizer; 47. centrifuge; 48. dryer; 49. nickel salt collecting part; 491. material pump; 492. extraction pipe; 493. feeding pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] See also Figure 1 A nickel-containing wastewater vacuum evaporation device in this embodiment includes a processing box 1, a wastewater feeding mechanism 2, a vacuum evaporation mechanism 3 and a collection mechanism 4.

[0036] See also Figures 2 to 3 In order to pre-treat the nickel-containing wastewater, the wastewater feeding mechanism 2 in this embodiment includes a limiting frame 21, a multi-stage filter 22, a first water pump 23, a first water pumping pipe 24, a first water delivery pipe 25 and a sedimentation tank 26. The limiting frame 21 is fixed to the inner wall of the treatment box 1, and the multi-stage filter 22 is plugged into the inside of the limiting frame 21. The wastewater passes through the limiting frame 21 and the multi-stage filter 22 to remove finer particles and impurities in the wastewater. The filtered wastewater is deposited in the treatment tank. The bottom of the processing box 1 is ready to enter the next step of processing. The first water pump 23 is fixed to the upper surface of the processing box 1. One end of the first pumping pipe 24 is connected to the water inlet end of the first water pump 23, and the other end of the pumping pipe 24 is connected to the sedimentation tank 26. The first water supply pipe 25 is connected to the water outlet end of the first water pump 23. The nickel-containing wastewater first flows into the sedimentation tank 26 to precipitate large particles of impurities. Then the first water pump 23 extracts the upper layer of wastewater from the sedimentation tank 26 through the first pumping pipe 24.

[0037] In this embodiment, the bottom end of the first water supply pipe 25 passes through and extends to the inner wall of the treatment box 1 and is located above the multi-stage filter 22 , and the wastewater is transported to the top of the multi-stage filter 22 of the treatment box 1 through the first water supply pipe 25 .

[0038] See also Figure 4In order to perform high-temperature vacuum evaporation treatment on nickel-containing wastewater, the vacuum evaporation mechanism 3 in this embodiment includes a vacuum tank 31, a rotating shaft 32, a stirring rod 33, a stirring motor 34, a heater 35, an electric heating tube 36, a second water pumping pipe 37, a second water pump 38 and a second water supply pipe 39. One end of the second water pumping pipe 37 is connected to the inner bottom wall of the treatment box 1, and the other end of the second water pumping pipe 37 is connected to the second water pump 38. One end of the second water supply pipe 39 is connected to the water outlet end of the second water pump 38, and the other end of the second water supply pipe 39 is connected to the vacuum tank 31. The rotating shaft 32 is rotatably connected to the vacuum tank 31 through a bearing. 1, the stirring rod 33 is fixed to the outer side of the rotating shaft 32, the stirring motor 34 is fixed to the upper surface of the vacuum tank 31, and the outer side of the output shaft of the stirring motor 34 is fixed to the rotating shaft 32, the stirring motor 34 drives the stirring rod 33 to accelerate the evaporation process of the wastewater, the heater 35 is fixed to the bottom of the vacuum tank 31, the wastewater is pumped from the processing box 1 to the vacuum tank 31 through the second pumping pipe 37, the heater 35 and the electric heating tube 36 heat the wastewater in the vacuum tank 31 to evaporate it, the electric heating tube 36 is fixed to the inner wall of the vacuum tank 31, and the electric heating tube 36 is electrically connected to the heater 35 through a wire.

[0039] In this embodiment, the number of stirring rods 33 is not less than two, and they are evenly distributed in the length direction of the rotating shaft 32. A vacuum pump is fixed to the back of the vacuum tank 31, and a vacuum tube connected to the inner wall of the vacuum tank 31 is fixed to the input end of the vacuum pump. The vacuum pump maintains the vacuum tank 31 in a vacuum state through the vacuum tube before treatment to promote the evaporation of wastewater. The water vapor generated by evaporation is discharged from the vacuum tank 31 and is ready to enter the condensation process.

[0040] See also Figure 5In order to separate and collect the evaporated nickel-containing wastewater for use, the collection mechanism 4 in this embodiment includes an air-cooled condenser 41, a steam inlet pipe 42, a condensed water pipe 43, a condensed water collection tank 44, a collection frame 45, a crystallizer 46, a centrifuge 47, a dryer 48 and a nickel salt collection member 49. The air-cooled condenser 41 is fixed to the outer side of the vacuum tank 31, the steam inlet pipe 42 is connected to the input end of the air-cooled condenser 41, one end of the condensed water pipe 43 is connected to the output end of the air-cooled condenser 41, and the other end of the condensed water pipe 43 is connected to the condensed water collection tank 44, and the water vapor enters the air-cooled condenser through the steam inlet pipe 42. 41, where it is condensed into liquid water, and the condensed water flows into the condensed water collecting tank 44 through the condensed water pipe 43, the collecting frame 45 is fixed to the outside of the condensed water collecting tank 44, the crystallizer 46 is fixed to the inside of the collecting frame 45, the centrifuge 47 is fixed to the outside of the crystallizer 46, the dryer 48 is fixed to the outside of the centrifuge 47, the nickel salt collecting member 49 is arranged on the outside of the collecting frame 45 to extract the nickel salt left after evaporation and introduce it into the collecting mechanism 4 for further processing, the nickel salt solution is fed into the crystallizer 46 through the feeding pipe 493 for crystallization, the crystallized nickel salt is separated by the centrifuge 47, and then dried in the dryer 48.

[0041] The nickel salt collecting component 49 includes a material pump 491, a drawing pipe 492 and a feeding pipe 493. The material pump 491 is fixed to the upper surface of the collecting frame 45. One end of the drawing pipe 492 is connected to the feeding end of the material pump 491, and the other end of the drawing pipe 492 is connected to the inner bottom wall of the vacuum tank 31. One end of the feeding pipe 493 is connected to the discharging end of the material pump 491, and the other end of the feeding pipe 493 passes through and extends to the interior of the crystallizer 46. The unevaporated concentrated nickel salt solution continues to concentrate in the vacuum tank 31, and the material pump 491 of the nickel salt collecting component 49 extracts the concentrated nickel salt solution from the vacuum tank 31 through the drawing pipe 492.

[0042] In this embodiment, a control valve is fixed to the outside of the extraction pipe 492, and a drain pipe is connected to the lower part of the outside of the condensate collecting tank 44. The dried nickel salt is collected by the nickel salt collecting component 49 for further use or treatment, and the treated water is discharged from the system through the drain pipe outside the condensate collecting tank 44.

[0043] The working principle of the above embodiment is:

[0044] (1) When nickel-containing wastewater is used for wastewater pretreatment, the nickel-containing wastewater first flows into the sedimentation tank 26 to precipitate large particles of impurities, and then the first water pump 23 extracts the upper layer of wastewater from the sedimentation tank 26 through the first pumping pipe 24. The wastewater is transported to the top of the multi-stage filter 22 of the treatment box 1 through the first water supply pipe 25. The wastewater passes through the limit frame 21 and the multi-stage filter 22 to remove finer particles and impurities in the wastewater. The filtered wastewater is deposited at the bottom of the treatment box 1 to prepare for the next step of treatment.

[0045] (2) When high-temperature vacuum evaporation treatment is performed on nickel-containing wastewater, the wastewater is pumped from the treatment box 1 to the vacuum tank 31 through the second pumping pipe 37. The heater 35 and the electric heating tube 36 heat the wastewater in the vacuum tank 31 to evaporate it. The stirring motor 34 drives the stirring rod 33 to accelerate the evaporation process of the wastewater. The vacuum pump maintains the vacuum tank 31 in a vacuum state through the vacuum tube before treatment to promote the evaporation of the wastewater. The water vapor generated by the evaporation is discharged from the vacuum tank 31 and is ready to enter the condensation process.

[0046] (3) When the evaporated nickel-containing wastewater is separated and collected for use, the water vapor enters the air-cooled condenser 41 through the steam inlet pipe 42, where it is condensed into liquid water. The condensed water flows into the condensed water collection tank 44 through the condensed water pipe 43. The concentrated nickel salt solution that has not evaporated continues to concentrate in the vacuum tank 31. The material pump 491 of the nickel salt collecting component 49 extracts the concentrated nickel salt solution from the vacuum tank 31 through the extraction pipe 492. The nickel salt solution is fed into the crystallizer 46 through the feed pipe 493 for crystallization. The crystallized nickel salt is separated by the centrifuge 47 and then dried in the dryer 48. The dried nickel salt is collected by the nickel salt collecting component 49 for further use or treatment. The treated water is discharged from the system through the drain pipe outside the condensed water collection tank 44.

Claims

1. A nickel-containing wastewater vacuum evaporation device, characterized in that: It comprises a treatment box (1), a wastewater feeding mechanism (2), a vacuum evaporation mechanism (3) and a collection mechanism (4); The wastewater feeding mechanism (2) comprises a limiting frame (21), a multi-stage filter (22), a first water pump (23), a first water extraction pipe (24), a first water supply pipe (25) and a sedimentation tank (26); the limiting frame (21) is fixed to the inner wall of the treatment box (1); the multi-stage filter (22) is plugged into the inside of the limiting frame (21); the first water pump (23) is fixed to the upper surface of the treatment box (1); one end of the first water extraction pipe (24) is connected to the water inlet end of the first water pump (23); and the other end of the first water extraction pipe (24) is connected to the sedimentation tank (26); and the first water supply pipe (25) is connected to the water outlet end of the first water pump (23); The vacuum evaporation mechanism (3) comprises a vacuum tank (31), a rotating shaft (32), a stirring rod (33), a stirring motor (34), a heater (35), an electric heating pipe (36), a second water pumping pipe (37), a second water pump (38) and a second water supply pipe (39), one end of the second water pumping pipe (37) being in communication with the inner bottom wall of the processing box (1), and the other end of the second water pumping pipe (37) being in communication with the second water pump (38), one end of the second water supply pipe (39) being in communication with the water outlet end of the second water pump (38), and the other end of the second water supply pipe (39) being in communication with the water outlet end of the second water pump (38). The vacuum tank (31) is connected to the rotating shaft (32), which is rotatably connected between the upper and lower inner walls of the vacuum tank (31) through a bearing. The stirring rod (33) is fixed to the outer side of the rotating shaft (32). The stirring motor (34) is fixed to the upper surface of the vacuum tank (31), and the outer side of the output shaft of the stirring motor (34) is fixed to the rotating shaft (32). The heater (35) is fixed to the bottom of the vacuum tank (31). The electric heating tube (36) is fixed to the inner wall of the vacuum tank (31), and the electric heating tube (36) and the heater (35) are electrically connected through a wire.

2. A nickel-containing wastewater vacuum evaporation equipment according to claim 1, characterized in that: The bottom end of the first water supply pipe (25) penetrates and extends to the inner wall of the treatment box (1) and is located above the multi-stage filter (22).

3. A nickel-containing wastewater vacuum evaporation equipment according to claim 1, characterized in that: The number of the stirring rods (33) is no less than two, and they are evenly distributed in the length direction of the rotating shaft (32).

4. A nickel-containing wastewater vacuum evaporation equipment according to claim 1, characterized in that: A vacuum pump is fixed on the back of the vacuum tank (31), and a vacuum tube connected to the inner wall of the vacuum tank (31) is fixed on the input end of the vacuum pump.

5. A nickel-containing wastewater vacuum evaporation equipment according to claim 1, characterized in that: The collecting mechanism (4) comprises an air-cooled condenser (41), a steam inlet pipe (42), a condensed water pipe (43), a condensed water collecting tank (44), a collecting frame (45), a crystallizer (46), a centrifuge (47), a dryer (48) and a nickel salt collecting element (49); the air-cooled condenser (41) is fixed to the outside of the vacuum tank (31); the steam inlet pipe (42) is connected to the input end of the air-cooled condenser (41); one end of the condensed water pipe (43) is connected to the output end of the air-cooled condenser (41); The other end of the condensate pipe (43) is connected to a condensate collection tank (44), the collection frame (45) is fixed to the outside of the condensate collection tank (44), the crystallizer (46) is fixed to the inside of the collection frame (45), the centrifuge (47) is fixed to the outside of the crystallizer (46), the dryer (48) is fixed to the outside of the centrifuge (47), and the nickel salt collection member (49) is arranged on the outside of the collection frame (45) to extract the nickel salt remaining after evaporation and introduce it into the collection mechanism (4) for further processing.

6. A nickel-containing wastewater vacuum evaporation equipment according to claim 5, characterized in that: The nickel salt collecting component (49) comprises a material pump (491), a material extraction pipe (492) and a material feeding pipe (493); the material pump (491) is fixed to the upper surface of the collecting frame (45); one end of the material extraction pipe (492) is connected to the feeding end of the material pump (491), and the other end of the material extraction pipe (492) is connected to the inner bottom wall of the vacuum tank (31); one end of the material feeding pipe (493) is connected to the discharging end of the material pump (491), and the other end of the material feeding pipe (493) passes through and extends to the interior of the crystallizer (46).

7. A nickel-containing wastewater vacuum evaporation equipment according to claim 6, characterized in that: A control valve is fixed on the outside of the extraction pipe (492).

8. A nickel-containing wastewater vacuum evaporation device according to claim 5, characterized in that: The lower part of the outer side of the condensed water collection tank (44) is connected to a drainage pipe.

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