Equipment and method for reducing organic matters in wastewater evaporation mother liquor

Abstract

The invention discloses equipment and a method for reducing organic matters in wastewater evaporation mother liquor, and relates to the technical field of wastewater treatment.The equipment is characterized in that a filter box is arranged at the bottom of a filter tank, and a first connecting pipe is arranged between the filter tank and the filter box; an electric treatment box is arranged on one side of the filter box; a flow guide pipe is arranged between the filter box and the electric treatment box; a treatment tank is arranged on one side of the electric treatment box, a water outlet pipe is arranged between the electric treatment box and the treatment tank, the other end of the water outlet pipe is located in the treatment tank, and the end, in the treatment tank, of the water outlet pipe is connected with an evaporation tank. According to the equipment and the method for reducing the organic matters in the wastewater evaporation mother liquor, the electric treatment box is arranged, so that COD in the mother liquor is reduced, and a salt product for producing crystalline salt is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a device and a method for reducing organic matter in wastewater evaporation mother liquor. Background Art

[0002] COD (Chemical Oxygen Demand) is an important indicator to measure the content of organic matter and reducing inorganic matter in water. When the COD value in water is too high, it means that the water is seriously polluted by organic matter. These organic matter are not easily degraded in the water environment and may exist in the water for a long time. Some harmful organic matter can accumulate in aquatic organisms and be passed to humans through the food chain, posing a long-term potential threat to human health. If water sources with high COD values ​​are used as drinking water sources without adequate treatment, the harmful substances in them can directly endanger human health.

[0003] When evaporating high-salt and high-COD wastewater, the COD in the mother liquor will continue to accumulate with the cyclic evaporation, seriously affecting the evaporation efficiency and salt quality; and in the process of water evaporation, the uneven crystallization of salt is not conducive to the volatilization of impurities after COD decomposition, and increases the evaporation load.

[0004] Therefore, an apparatus and method for reducing organic matter in wastewater evaporation mother liquor are provided to reduce the evaporation load, improve the purity of produced crystalline salt, and ensure the quality of the output salt. Summary of the invention

[0005] Therefore, the object of the present invention is to provide a device and method for reducing organic matter in wastewater evaporation mother liquor, so as to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an apparatus and method for reducing organic matter in wastewater evaporation mother liquor, comprising: In a first aspect, the present invention provides an apparatus for reducing organic matter in wastewater evaporation mother liquor, and adopts the following technical scheme: a filter tank, a filter box is arranged at the bottom of the filter tank, and a first connecting pipe is arranged between the filter tank and the filter box; an electric treatment box is arranged on one side of the filter box, and the electric treatment box is used for electrocatalytically oxidizing the mother liquor; a guide pipe is arranged between the filter box and the electric treatment box; a treatment tank is arranged on one side of the electric treatment box, and the treatment tank is used for treating the mother liquor after electrocatalytic oxidation, an outlet pipe is arranged between the electric treatment box and the treatment tank, the other end of the outlet pipe is located inside the treatment tank, and one end of the outlet pipe inside the treatment tank is connected to the evaporation tank.

[0007] As a preferred embodiment of the device and method for reducing organic matter in wastewater evaporation mother liquor described in the present invention, a filter plate is arranged on the inner top surface of the filter tank, a plurality of filter holes are evenly opened on the filter plate, a first connecting pipe is arranged at the center of the bottom surface of the filter tank, the first connecting pipe passes through the bottom surface of the filter tank, and the other end of the first connecting pipe is connected to the interior of the filter box.

[0008] As a preferred embodiment of the device and method for reducing organic matter in wastewater evaporation mother liquor described in the present invention, a partition plate is arranged inside the filter box, a water guide hole is opened at the center of the partition plate, the water guide hole penetrates the partition plate, a plurality of filter layers are arranged on the bottom surface of the filter box, the plurality of filter layers are evenly and symmetrically distributed along the inner bottom surface of the filter box, the filter layers on each side that are symmetrical to each other are parallel to each other, the bottom surfaces of the two filter layers on both sides of the center line of the bottom surface of the filter box are connected to each other, the outermost filter layer is connected to the inner side surface of the filter box, and the water guide hole is located above the connection between the filter layers.

[0009] As a preferred embodiment of the device and method for reducing organic matter in wastewater evaporation mother liquor described in the present invention, a pair of guide pipes are arranged on the sides opposite to the filter box and the electrical treatment box, the shape and size of the guide pipes correspond to the shape and size formed between the filter layer at the edge and the inner side of the filter box, and the other end of the guide pipe is flush with the inner wall of the electrical treatment box.

[0010] As a preferred embodiment of the device and method for reducing organic matter in the mother liquor of wastewater evaporation described in the present invention, a first mounting hole is provided on one side of the electric treatment box, the shape and size of the first mounting hole correspond to the shape and size of the guide pipe, a second mounting hole is provided at the center of the side of the electric treatment box where the first mounting hole is located, an inlet pipe is provided inside the second mounting hole, a water pump is provided at the top of the inlet pipe, one side of the water pump is connected to the side of the filter box, and the other side of the water pump is provided with a water outlet pipe; a pair of partitions are symmetrically provided inside the electric treatment box Water plate, one side of the water baffle is vertically connected to the inner wall of the side of the electric treatment box of the first mounting hole, and a guide plate is arranged on the other side of the water baffle, and the other end of the guide plate is connected to the inner side of the electric treatment box; a plurality of mounting columns are arranged on the two side surfaces of the water baffle, the other ends of the mounting columns at the outer ends of the two water baffles are fixed on the inner side of the electric treatment box, and the two ends of the mounting columns at the inner ends of the two water baffles are respectively fixed on the two ends of the water baffle; a plurality of electrolytic positive electrodes and electrolytic negative electrodes are arranged on the side of the mounting columns, and the electrolytic positive electrodes and the electrolytic negative electrodes are staggered and evenly distributed.

[0011] As a preferred embodiment of the device and method for reducing organic matter in wastewater evaporation mother liquor described in the present invention, a plurality of air ducts are arranged on the top surface of the electrical treatment box, the air ducts penetrate the top surface of the electrical treatment box, a combined air pipe is arranged above the air ducts, the combined air pipe connects the top ends of the plurality of air ducts, a connecting pipe is arranged above the combined air pipes, and the other end of the connecting pipe is connected to the water outlet pipe.

[0012] As a preferred solution of the device and method for reducing organic matter in wastewater evaporation mother liquor described in the present invention, a drainage pipe is arranged at the bottom of the side of the treatment tank; a plurality of fixed columns are arranged on the inner wall of the treatment tank, a heating coil is arranged at the other end of the fixed columns, and the heating coil is located on the outside of the evaporation tank; the evaporation tank is connected to the water outlet pipe, and a plurality of exhaust holes are evenly arranged on the top surface of the evaporation tank; a second connecting pipe is arranged at the bottom of the evaporation tank, a grinding pipe is arranged at the other end of the second connecting pipe, and the second connecting pipe passes through the top surface of the grinding pipe.

[0013] As a preferred embodiment of the device and method for reducing organic matter in wastewater evaporation mother liquor described in the present invention, wherein: a grinding table is arranged inside the grinding tube, a plurality of grinding columns are evenly arranged inside the grinding table, the sides of the grinding columns exceed the sides of the grinding table, rotation shafts are arranged at both ends of the grinding columns, the top surface of the rotation shaft is flush with the top surface of the grinding table, and a limit block is arranged on the side of the rotation shaft, and the limit block is located inside the side of the grinding table; a driven gear is arranged on the side of the rotation shaft below the grinding column, and the driven gear is located inside the bottom surface of the grinding table; a rotating shaft is attached to the inner top surface of the grinding table, a driving gear is arranged on the side of the rotating shaft, and the driving gear is located inside the bottom surface of the grinding table, and the driving gear is meshed with the driven gear.

[0014] As a preferred embodiment of the device and method for reducing organic matter in wastewater evaporation mother liquor described in the present invention, the bottom surface of the rotating shaft passes through the bottom surface of the grinding table and is located on the outside of the grinding table, a motor is arranged on the bottom surface of the rotating shaft, and the bottom surface of the motor is fixed on the inner bottom surface of the treatment tank; an isolation tube is arranged on the bottom surface of the grinding table, the outer diameter of the isolation tube is the same as the side dimension of the grinding table, the inner diameter of the isolation tube is larger than the size of the motor, and the motor is located inside the isolation tube.

[0015] In a second aspect, the present application provides a processing method, comprising the following steps: S1: The mother liquor with high salt and high COD is added to the inside of the filter tank, and the water pump, heating coil and motor are started from the outside at the same time, and the positive and negative electrodes of the electrolysis are energized. When the mother liquor passes through the filter plate and enters the inside of the filter tank, the filter holes on the filter plate filter the floating objects and large solid particles in the mother liquor to obtain a relatively clear mother liquor; the mother liquor then enters the inside of the filter box through the first connecting pipe, enters the filter layer below the partition plate from the water guide hole on the partition plate, and gradually flows to the filter layers on both sides. The filter layer absorbs the floating foam and fine particles in the mother liquor to obtain a clean mother liquor; S2: The water pump draws the mother liquor from the guide pipe into the inner sides of the watertight plate, and the COD in the mother liquor is electrolyzed into carbon dioxide and water through the energized electrolytic positive electrode and electrolytic negative electrode; the mother liquor moves from the two sides of the watertight plate to the center, and undergoes secondary electrolysis at the center of the watertight plate to completely electrolyze the mother liquor entering the watertight plate; the electrolyzed water follows the mother liquor and enters the water outlet pipe from the water inlet pipe and finally enters the evaporation tank under the drive of the water pump; the electrolyzed carbon dioxide partially dissolves in the mother liquor and follows the mother liquor into the treatment tank, and the rest of the carbon dioxide enters the water outlet pipe from the connecting pipe and finally enters the evaporation tank; S3: The heating coil heats the evaporator. After the mother liquor enters the evaporator, the high-temperature evaporator releases the carbon dioxide in the mother liquor and discharges it from the exhaust hole. At the same time, part of the water in the mother liquor is evaporated, so that part of the salt in the mother liquor is crystallized and enters the grinding tube along with the flowing mother liquor; S4: The mother liquor carrying the crystallized salt enters the grinding tube, and the motor drives the grinding column to rotate. When the grinding column rotates, the grinding column on the grinding table and the inner wall of the grinding tube grind the crystallized salt in the mother liquor, so that the crystallized salt is crushed and flows with the mother liquor to obtain a pure crystallized salt mother liquor.

[0016] Beneficial effects of the present invention: 1. The present invention provides an apparatus and method for reducing organic matter in wastewater evaporation mother liquor. An evaporation tank, a heating coil, a grinding tube and a grinding table are provided. The heating coil heats the mother liquor in the evaporation tank to partially evaporate the water content of the mother liquor in the evaporation tank, forming crystalline salt in the mother liquor, and the crystalline salt flows into the grinding tube along with the mother liquor. The grinding table crushes and grinds the mother liquor and the crystalline salt in the grinding tube to obtain a mother liquor containing crystalline powder, which is discharged from a drain pipe, thereby reducing the final evaporation load of the mother liquor.

[0017] 2. The present invention provides an apparatus and method for reducing organic matter in wastewater evaporation mother liquor. By setting an electrical treatment box, the COD in the mother liquor is reduced and the quality of the produced crystalline salt is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 This is a schematic diagram of the overall structure of an apparatus and method for reducing organic matter in wastewater evaporation mother liquor according to the present invention; Figure 2 It is a partial structural schematic diagram of an apparatus and method for reducing organic matter in wastewater evaporation mother liquor of the present invention; Figure 3A partial top view of an apparatus and method for reducing organic matter in wastewater evaporation mother liquor according to the present invention; Figure 4 A partial cross-section of an apparatus and method for reducing organic matter in wastewater evaporation mother liquor according to the present invention Figure 1 ; Figure 5 A partial cross-section of an apparatus and method for reducing organic matter in wastewater evaporation mother liquor according to the present invention Figure 2 ; Figure 6 A schematic diagram of the structure of a grinding table of an apparatus and method for reducing organic matter in wastewater evaporation mother liquor according to the present invention; Figure 7 The present invention is a cross-sectional view of a grinding table of an apparatus and method for reducing organic matter in wastewater evaporation mother liquor.

[0019] Description of reference numerals: 1. Filter tank; 11. Filter plate; 12. Filter hole; 13. First connecting pipe; 2. Filter box; 21. Partition plate; 22. Water guide hole; 23. Filter layer; 24. Guide pipe; 3. Electric treatment box; 31. Air guide pipe; 32. Gas pipe; 33. Water outlet pipe; 34. Connection pipe; 35. First mounting hole; 36. Second mounting hole; 37. Water inlet pipe; 38. Water pump; 4. Water baffle; 41. Guide plate ; 42. Mounting column; 43. Electrolytic positive electrode; 44. Electrolytic negative electrode; 5. Processing tank; 51. Drain pipe; 52. Evaporation tank; 53. Exhaust hole; 54. Heating coil; 55. Fixed column; 56. Second connecting pipe; 6. Grinding tube; 61. Isolation tube; 62. Motor; 63. Rotating shaft; 64. Driving gear; 7. Grinding table; 71. Grinding column; 72. Rotating shaft; 73. Limit block; 74. Driven gear. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] Reference Figure 1-7 , a device and method for reducing organic matter in wastewater evaporation mother liquor provided by the present invention, the device and method for reducing organic matter in wastewater evaporation mother liquor include: A device for reducing organic matter in wastewater evaporation mother liquor, comprising a filter tank 1, a filter box 2 is arranged at the bottom of the filter tank 1, a first connecting pipe 13 is arranged between the filter tank 1 and the filter box 2; an electric treatment box 3 is arranged on one side of the filter box 2, and the electric treatment box 3 is used for electrocatalytic oxidation of the mother liquor; a guide pipe 24 is arranged between the filter box 2 and the electric treatment box 3; a treatment tank 5 is arranged on one side of the electric treatment box 3, and the treatment tank 5 is used for treating the mother liquor after electrocatalytic oxidation, an outlet pipe 33 is arranged between the electric treatment box 3 and the treatment tank 5, the other end of the outlet pipe 33 is located inside the treatment tank 5, and one end of the outlet pipe 33 inside the treatment tank 5 is connected to an evaporation tank 52.

[0022] Specifically, a filter box 2 is provided at the bottom of the filter tank 1, and a first connecting pipe 13 is provided between the filter tank 1 and the filter box 2. The mother liquor passes through the filter tank 1, undergoes the first filtration, and enters the filter box 2 from the first connecting pipe 13; an electric treatment box 3 is provided on one side of the filter box 2, and a guide pipe 24 is provided between the filter box 2 and the electric treatment box 3; after the mother liquor enters the filter box 2, it undergoes secondary filtration to obtain pure mother liquor, and enters the electric treatment box 3 through the guide pipe 24, and electrocatalytic oxidation is performed inside the electric treatment box 3 to eliminate COD in the mother liquor; a treatment tank 5 is provided on one side of the electric treatment box 3, and an outlet pipe 33 is provided between the electric treatment box 3 and the treatment tank 5, and the other end of the outlet pipe 33 is located inside the treatment tank 5, and one end of the outlet pipe 33 inside the treatment tank 5 is connected to an evaporation tank 52, and the mother liquor with COD eliminated enters the evaporation tank 52, and the mother liquor is preliminarily evaporated and crystallized.

[0023] A filter plate 11 is arranged on the inner top surface of the filter tank 1, and a plurality of filter holes 12 are evenly opened on the filter plate 11. A first connecting pipe 13 is arranged at the center of the bottom surface of the filter tank 1. The first connecting pipe 13 passes through the bottom surface of the filter tank 1, and the other end of the first connecting pipe 13 is connected to the interior of the filter box 2.

[0024] Specifically, the concentrated floating matter and larger particles in the mother liquor are isolated outside the filter plate 11 through the filter holes 12 on the filter plate 11 , the mother liquor is filtered for the first time, and enters the filter box 2 through the filter holes 12 .

[0025] A partition plate 21 is provided inside the filter box 2, and a water guide hole 22 is opened at the center of the partition plate 21. The water guide hole 22 penetrates the partition plate 21. A plurality of filter layers 23 are provided on the bottom surface of the filter box 2. The plurality of filter layers 23 are evenly and symmetrically distributed along the inner bottom surface of the filter box 2. The filter layers 23 on each side that are symmetrical to each other are parallel to each other. The bottom surfaces of the two filter layers 23 on both sides of the center line of the bottom surface of the filter box 2 are connected to each other, and the outermost filter layer 23 is connected to the inner side surface of the filter box 2. The water guide hole 22 is located above the connection between the filter layers 23.

[0026] Specifically, the mother liquor enters the filter layer 23 through the water guide hole 22 on the partition plate 21, and the mother liquor flows from the connection of the filter layer 23 to the filter layers 23 on both sides. The filter layer 23 absorbs and filters the foam and fine particles in the mother liquor to obtain pure mother liquor.

[0027] A pair of guide tubes 24 are arranged on the sides opposite to the filter box 2 and the electrical treatment box 3. The shape and size of the guide tubes 24 correspond to the shape and size formed between the filter layer 23 at the edge and the inner side surface of the filter box 2. The other end of the guide tubes 24 is flush with the inner wall of the electrical treatment box 3.

[0028] Specifically, after the mother liquor is filtered twice in the filter layer 23, it enters the electrical treatment box 3 from the guide pipe 24 for electrocatalytic oxidation.

[0029] A first mounting hole 35 is provided on one side of the electric treatment box 3, and the shape and size of the first mounting hole 35 correspond to the shape and size of the guide tube 24. A second mounting hole 36 is provided at the center of the side of the electric treatment box 3 where the first mounting hole 35 is located. An inlet pipe 37 is provided inside the second mounting hole 36, and a water pump 38 is provided at the top of the inlet pipe 37. One side of the water pump 38 is connected to the side of the filter box 2, and the other side of the water pump 38 is provided with a water outlet pipe 33. A pair of baffles 4 are symmetrically provided inside the electric treatment box 3, and one side of the baffles 4 is connected to the electric treatment box 2 of the first mounting hole 35. The inner walls of the side surfaces of the treatment box 3 are vertically connected, and a guide plate 41 is provided on the other side of the baffle plate 4, and the other end of the guide plate 41 is connected to the inner side surface of the electrical treatment box 3; a plurality of mounting columns 42 are provided on the two side surfaces of the baffle plate 4, and the other ends of the mounting columns 42 at the outer ends of the two baffle plates 4 are fixed on the inner side surface of the electrical treatment box 3, and the two ends of the mounting columns 42 at the inner ends of the two baffle plates 4 are respectively fixed on the two ends of the baffle plate 4; a plurality of electrolytic positive electrodes 43 and electrolytic negative electrodes 44 are provided on the side surfaces of the mounting columns 42, and the electrolytic positive electrodes 43 and the electrolytic negative electrodes 44 are staggered and evenly distributed.

[0030] Specifically, the mother liquor is driven by the water pump 38 from the guide pipe 24 into the interior of the electrical treatment box 3, and the mother liquor is catalyzed for oxidation in the electrolytic positive electrode 43 and the electrolytic negative electrode 44. The mother liquor then moves from the mounting column 42 to the second mounting hole 36, and is secondary catalyzed for oxidation through the electrolytic positive electrode 43 and the electrolytic negative electrode 44 outside the second mounting hole 36, so that the COD in the mother liquor is completely removed. Driven by the water pump 38, the mother liquor enters the water outlet pipe 33 from the water inlet pipe 37, and finally passes into the evaporation tank 52.

[0031] A plurality of air ducts 31 are provided on the top surface of the electrical processing box 3. The air ducts 31 penetrate the top surface of the electrical processing box 3. A gas combining pipe 32 is provided above the air ducts 31. The gas combining pipe 32 connects the top ends of the plurality of air ducts 31. A connecting pipe 34 is provided above the gas combining pipe 32. The other end of the connecting pipe 34 is connected to the water outlet pipe 33.

[0032] Specifically, part of the carbon dioxide after COD catalysis is discharged through the air guide pipe 31 and enters the interior of the water outlet pipe 33 .

[0033] A drain pipe 51 is provided at the bottom of the side of the processing tank 5; a plurality of fixing columns 55 are provided on the inner wall of the processing tank 5, a heating coil 54 is provided at the other end of the fixing column 55, and the heating coil 54 is located on the outside of the evaporation tank 52; the evaporation tank 52 is connected to the water outlet pipe 33, and a plurality of exhaust holes 53 are evenly provided on the top surface of the evaporation tank 52; a second connecting pipe 56 is provided at the bottom of the evaporation tank 52, a grinding pipe 6 is provided at the other end of the second connecting pipe 56, and the second connecting pipe 56 passes through the top surface of the grinding pipe 6.

[0034] Specifically, the heating coil 54 is fixed to the outside of the evaporation tank 52 by the fixing column 55. The heating coil 54 heats the evaporation tank 52 after being powered on, and heats the mother liquor. Part of the water and carbon dioxide in the mother liquor are discharged from the exhaust hole 53 in the form of steam after heating, so that crystallized salt is formed in the mother liquor. The crystallized salt continues to move with the mother liquor, enters the grinding tube 6 from the second connecting pipe 56, and is finally discharged from the drain pipe 51.

[0035] A grinding table 7 is arranged inside the grinding tube 6, and a plurality of grinding columns 71 are evenly arranged inside the grinding table 7. The sides of the grinding columns 71 extend beyond the sides of the grinding table 7. Rotation shafts 72 are arranged at both ends of the grinding columns 71. The top surface of the rotation shaft 72 is flush with the top surface of the grinding table 7. A limit block 73 is arranged on the side of the rotation shaft 72, and the limit block 73 is located inside the side of the grinding table 7; a driven gear 74 is arranged on the side of the rotation shaft 72 below the grinding column 71, and the driven gear 74 is located inside the bottom surface of the grinding table 7; a rotating shaft 63 is attached to the inner top surface of the grinding table 7, and a driving gear 64 is arranged on the side of the rotating shaft 63, and the driving gear 64 is located inside the bottom surface of the grinding table 7, and the driving gear 64 is meshed with the driven gear 74.

[0036] Specifically, the size of the driving gear 64 is larger than that of the driven gear 74. The rotating shaft 63 rotates to make the grinding tube 6 rotate independently of the grinding table 7 and rotate inside the grinding tube 6. When the rotating shaft 63 rotates, the driving gear 64 drives the driven gear 74 to accelerate the rotation, thereby accelerating the rotation of the grinding column 71. The grinding column 71 is vertically positioned inside the grinding table 7 through the cooperation of the self-rotating shaft 72 and the limit block 73. The crystallized salt in the mother liquor is crushed and ground by the rotation of the grinding table 7 and the grinding column 71 inside the grinding tube 6 and the inner wall of the grinding tube 6, thereby reducing the evaporation load of the mother liquor. When grinding, the crystallized salt on the grinding column 71 is scraped off by the friction between the grinding column 71 and the outer wall of the grinding table 7. In addition, a plurality of grinding columns 71 can be installed inside the grinding table 7 so that the grinding columns 71 are closely arranged on the side of the grinding table 7.

[0037] The bottom surface of the rotating shaft 63 passes through the bottom surface of the grinding table 7 and is located on the outside of the grinding table 7. A motor 62 is arranged on the bottom surface of the rotating shaft 63, and the bottom surface of the motor 62 is fixed on the inner bottom surface of the processing tank 5. An isolation tube 61 is arranged on the bottom surface of the grinding table 7. The outer diameter of the isolation tube 61 is the same as the side dimension of the grinding table 7. The inner diameter of the isolation tube 61 is larger than the size of the motor 62, and the motor 62 is located inside the isolation tube 61.

[0038] Specifically, the motor 62 drives the rotating shaft 63 to rotate, and the isolation tube 61 isolates the motor 62 from the mother liquid to prevent the mother liquid from corroding the motor 62 after contacting the motor 62 and reducing the service life of the motor 62. The isolation tube 61 also supports and fixes the grinding table 7.

[0039] The embodiment of the present application also discloses a processing process.

[0040] A processing process comprises the following steps: S1: The mother liquor with high salt and high COD is added to the interior of the filter tank 1, and the water pump 38, the heating coil 54 and the motor 62 are started from the outside at the same time, and the electrolytic positive electrode 43 and the electrolytic negative electrode 44 are energized. When the mother liquor passes through the filter plate 11 and enters the interior of the filter tank 1, the filter holes 12 on the filter plate 11 filter the floating objects and large solid particles in the mother liquor to obtain a relatively clear mother liquor; the mother liquor then enters the interior of the filter box 2 through the first connecting pipe 13, enters the filter layer 23 below the partition plate 21 through the water guide hole 22 on the partition plate 21, and gradually flows to the filter layers 23 on both sides. The filter layer 23 absorbs the floating foam and fine particles in the mother liquor to obtain a clean mother liquor; S2: The water pump 38 sucks the mother liquor from the guide pipe 24 into the inner sides of the water-blocking plate 4, and the COD in the mother liquor is electrolyzed into carbon dioxide and water through the energized electrolysis positive electrode 43 and the electrolysis negative electrode 44; the mother liquor moves from the two sides of the water-blocking plate 4 to the center, and undergoes secondary electrolysis at the center of the water-blocking plate 4, and the mother liquor entering the water-blocking plate 4 is completely electrolyzed; the electrolyzed water follows the mother liquor and enters the water outlet pipe 33 from the water inlet pipe 37 under the drive of the water pump 38, and finally enters the evaporation tank 52; the electrolyzed carbon dioxide partially dissolves in the mother liquor and follows the mother liquor into the treatment tank 5, and the rest of the carbon dioxide enters the water outlet pipe 33 from the connecting pipe 34, and finally enters the evaporation tank 52; S3: The heating coil 54 heats the evaporation tank 52. After the mother liquor enters the evaporation tank 52, the high-temperature evaporation tank 52 releases the carbon dioxide in the mother liquor and discharges it from the exhaust hole 53. At the same time, part of the water in the mother liquor is evaporated, so that part of the salt in the mother liquor is crystallized and enters the grinding tube 6 along with the flowing mother liquor; S4: The mother liquor carrying the crystallized salt enters the grinding tube 6, and the motor 62 drives the grinding column 71 to rotate. When the grinding column 71 rotates, the grinding column 71 on the grinding table 7 and the inner wall of the grinding tube 6 grind the crystallized salt in the mother liquor, so that the crystallized salt is crushed and flows with the mother liquor to obtain a pure crystallized salt mother liquor.

[0041] During use, the mother liquor is added to the filter tank 1, and the filter tank 1 performs the first filtration on the mother liquor. The mother liquor then flows into the filter box 2, and the filter box 2 performs the second filtration on the mother liquor to obtain pure mother liquor. After the mother liquor is filtered, it enters the electric treatment box 3 for secondary electrocatalytic oxidation to complete the removal of the COD concentration in the mother liquor. The mother liquor is introduced into the evaporation tank 52 for preliminary evaporation to crystallize part of the salt in the mother liquor, and the mother liquor is followed by the grinding tube 6. The grinding table 7 grinds the mother liquor and the crystallized salt in the mother liquor inside the grinding tube 6, thereby finally reducing the evaporation load of the mother liquor and obtaining the quality of the crystallized salt.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for reducing organic matter in wastewater evaporation mother liquor, comprising a filter tank (1), characterized in that: A filter box (2) is arranged at the bottom of the filter tank (1), and a first connecting pipe (13) is arranged between the filter tank (1) and the filter box (2); an electric treatment box (3) is arranged on one side of the filter box (2), and the electric treatment box (3) is used to perform electrocatalytic oxidation on the mother liquor; a flow guide pipe (24) is arranged between the filter box (2) and the electric treatment box (3); a treatment tank (5) is arranged on one side of the electric treatment box (3), and the treatment tank (5) is used to treat the mother liquor after electrocatalytic oxidation; an outlet pipe (33) is arranged between the electric treatment box (3) and the treatment tank (5), and the other end of the outlet pipe (33) is located inside the treatment tank (5), and one end of the outlet pipe (33) inside the treatment tank (5) is connected to an evaporation tank (52).

2. The device for reducing organic matter in wastewater evaporation mother liquor according to claim 1, characterized in that: The inner top surface of the filter tank (1) is provided with a filter plate (11), and a plurality of filter holes (12) are evenly formed on the filter plate (11). A first connecting pipe (13) is provided at the center of the bottom surface of the filter tank (1), and the first connecting pipe (13) passes through the bottom surface of the filter tank (1), and the other end of the first connecting pipe (13) is connected to the inside of the filter box (2).

3. The device for reducing organic matter in wastewater evaporation mother liquor according to claim 1, characterized in that: The filter box (2) is provided with a partition plate (21) inside, a water guide hole (22) is opened at the center of the partition plate (21), and the water guide hole (22) penetrates the partition plate (21). The bottom surface of the filter box (2) is provided with a plurality of filter layers (23), and the plurality of filter layers (23) are evenly and symmetrically distributed along the inner bottom surface of the filter box (2). The filter layers (23) on each side that are symmetrical to each other are parallel to each other. The bottom surfaces of the two filter layers (23) on both sides of the center line of the bottom surface of the filter box (2) are connected to each other, and the outermost filter layer (23) is connected to the inner side surface of the filter box (2). The water guide hole (22) is located above the connection between the filter layers (23).

4. The device for reducing organic matter in wastewater evaporation mother liquor according to claim 3, characterized in that: A pair of flow guide tubes (24) are provided on the side surfaces of the filter box (2) opposite to the electrical treatment box (3); the shape and size of the flow guide tubes (24) correspond to the shape and size formed between the filter layer (23) at the edge and the inner side surface of the filter box (2); the other end of the flow guide tube (24) is flush with the inner wall of the electrical treatment box (3).

5. The device for reducing organic matter in wastewater evaporation mother liquor according to claim 1, characterized in that: A first mounting hole (35) is provided on one side of the electric treatment box (3), and the shape and size of the first mounting hole (35) correspond to the shape and size of the guide tube (24). A second mounting hole (36) is provided at the center of the side of the electric treatment box (3) where the first mounting hole (35) is located. A water inlet pipe (37) is provided inside the second mounting hole (36), and a water pump (38) is provided at the top end of the water inlet pipe (37). One side of the water pump (38) is connected to the side of the filter box (2), and the other side of the water pump (38) is provided with a water outlet pipe (33). A pair of water baffles (4) are symmetrically provided inside the electric treatment box (3), and one side of the water baffles (4) is connected to the first mounting hole (35). The water baffle (4) is vertically connected to the inner wall of the side of the electric treatment box (3); a guide plate (41) is arranged on the other side of the water baffle (4), and the other end of the guide plate (41) is connected to the inner side of the electric treatment box (3); a plurality of mounting columns (42) are arranged on the two side surfaces of the water baffle (4), the other ends of the mounting columns (42) at the outer ends of the two water baffles (4) are fixed on the inner side of the electric treatment box (3), and the two ends of the mounting columns (42) at the inner ends of the two water baffles (4) are respectively fixed to the two ends of the water baffle (4); a plurality of electrolytic positive electrodes (43) and electrolytic negative electrodes (44) are arranged on the side of the mounting columns (42), and the electrolytic positive electrodes (43) and the electrolytic negative electrodes (44) are staggered and evenly distributed.

6. The device for reducing organic matter in wastewater evaporation mother liquor according to claim 5, characterized in that: A plurality of air guide tubes (31) are arranged on the top surface of the electrical treatment box (3). The air guide tubes (31) penetrate the top surface of the electrical treatment box (3). A gas combining tube (32) is arranged above the air guide tubes (31). The gas combining tube (32) connects the top ends of the plurality of air guide tubes (31). A connecting tube (34) is arranged above the connecting tube (32). The other end of the connecting tube (34) is connected to the water outlet tube (33).

7. The device for reducing organic matter in wastewater evaporation mother liquor according to claim 1, characterized in that: A drainage pipe (51) is provided at the bottom of the side of the processing tank (5); a plurality of fixing columns (55) are provided on the inner wall of the processing tank (5); a heating coil (54) is provided at the other end of the fixing columns (55); the heating coil (54) is located outside the evaporation tank (52); the evaporation tank (52) is connected to the water outlet pipe (33); a plurality of exhaust holes (53) are evenly provided on the top surface of the evaporation tank (52); a second connecting pipe (56) is provided at the bottom of the evaporation tank (52); a grinding pipe (6) is provided at the other end of the second connecting pipe (56); the second connecting pipe (56) passes through the top surface of the grinding pipe (6).

8. The device for reducing organic matter in wastewater evaporation mother liquor according to claim 7, characterized in that: A grinding table (7) is arranged inside the grinding tube (6), and a plurality of grinding columns (71) are evenly arranged inside the grinding table (7). The side surfaces of the grinding columns (71) extend beyond the side surfaces of the grinding table (7). Rotation shafts (72) are arranged at both ends of the grinding columns (71). The top surfaces of the rotation shafts (72) are flush with the top surfaces of the grinding table (7). Limit blocks (73) are arranged on the side surfaces of the rotation shafts (72), and the limit blocks (73) are located inside the side surfaces of the grinding table (7); a driven gear (74) is arranged on the side surfaces of the rotation shafts (72) below the grinding columns (71), and the driven gear (74) is located inside the bottom surface of the grinding table (7); a rotating shaft (63) is attached to the top surface of the grinding table (7), and a driving gear (64) is arranged on the side surfaces of the rotating shafts (63), and the driving gear (64) is located inside the bottom surface of the grinding table (7), and the driving gear (64) is meshed with the driven gear (74).

9. The device for reducing organic matter in wastewater evaporation mother liquor according to claim 8, characterized in that: The bottom surface of the rotating shaft (63) passes through the bottom surface of the grinding table (7) and is located outside the grinding table (7). A motor (62) is arranged on the bottom surface of the rotating shaft (63), and the bottom surface of the motor (62) is fixed to the inner bottom surface of the processing tank (5). An isolation tube (61) is arranged on the bottom surface of the grinding table (7). The outer diameter of the isolation tube (61) is the same as the side dimension of the grinding table (7). The inner diameter of the isolation tube (61) is larger than the dimension of the motor (62). The motor (62) is located inside the isolation tube (61).

10. A method for reducing organic matter in wastewater evaporation mother liquor, applied to the device for reducing organic matter in wastewater evaporation mother liquor as claimed in any one of claims 1 to 9, comprising the following steps: S1: A mother liquor with high salt content and high COD content is added to the interior of the filter tank (1), and a water pump (38), a heating coil (54) and a motor (62) are simultaneously started from the outside, and the electrolytic positive electrode (43) and the electrolytic negative electrode (44) are energized. When the mother liquor passes through the filter plate (11) and enters the interior of the filter tank (1), the filter holes (12) on the filter plate (11) filter the floating matter and large solid particles in the mother liquor to obtain a relatively clear mother liquor; the mother liquor then enters the interior of the filter box (2) through the first connecting pipe (13), enters the filter layer (23) below the partition plate (21) through the water guide hole (22) on the partition plate (21), and gradually flows to the filter layers (23) on both sides. The filter layer (23) absorbs the floating foam and fine particles in the mother liquor to obtain a clean mother liquor; S2: The water pump (38) draws the mother liquor from the guide pipe (24) into the inner sides of the water baffle (4), and passes through the energized electrolytic positive electrode (43) and electrolytic negative electrode (44), and electrolyzes the COD in the mother liquor into carbon dioxide and water; the mother liquor moves from the two sides of the water baffle (4) to the center, and undergoes secondary electrolysis at the center of the water baffle (4), and the mother liquor entering the water baffle (4) is completely electrolyzed; the electrolyzed water follows the mother liquor and enters the water outlet pipe (33) from the water inlet pipe (37) driven by the water pump (38), and finally enters the evaporation tank (52); the electrolyzed carbon dioxide partially dissolves in the mother liquor and follows the mother liquor into the treatment tank (5), and the rest of the carbon dioxide enters the water outlet pipe (33) from the connecting pipe (34), and finally enters the evaporation tank (52); S3: The heating coil (54) heats the evaporation tank (52). After the mother liquor enters the evaporation tank (52), the high temperature evaporation tank (52) releases the carbon dioxide in the mother liquor and discharges it from the exhaust hole (53). At the same time, part of the water in the mother liquor is evaporated, so that part of the salt in the mother liquor is crystallized and enters the grinding tube (6) along with the flowing mother liquor. S4: The mother liquor carrying the crystallized salt enters the grinding tube (6), and the motor (62) drives the grinding column (71) to rotate. When the grinding column (71) rotates, the grinding column (71) on the grinding table (7) and the inner wall of the grinding tube (6) grind the crystallized salt in the mother liquor, so that the crystallized salt is crushed and flows with the mother liquor, thereby obtaining a pure crystallized salt mother liquor.

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