CN113354176B - Mother liquor treatment method after electroplating solution evaporation treatment and plate-and-frame filter press used for same - Google Patents

Abstract

The invention discloses a mother liquor treatment method after electroplating solution evaporation treatment and a plate-and-frame filter press used for the method, wherein electroplating mother liquor and caustic soda are pumped into a reserved pool, the pH value is adjusted to 7-9, electroplating solution is added, the electroplating solution is pumped into a reaction pool after being filtered by the plate-and-frame filter press, potassium permanganate and active carbon are added into the reaction pool, the potassium permanganate and the active carbon are filtered by the plate-and-frame filter press again, and the filtered feed liquid enters a triple-effect evaporator to produce a regenerated potassium chloride product; the invention also provides a plate-and-frame filter press for the mother liquor treatment method after electroplating solution evaporation treatment, which comprises a frame, a main beam rail, a filter plate, a cleaning support rail, a cleaning traversing mechanism, a plate pulling mechanism and a lifting cleaning mechanism. The invention can solve the problem of mother liquor production, reduce the cost for treating the mother liquor, avoid secondary damage to the environment, and produce the finished product of zinc hypoxide and the regenerated potassium chloride product by using byproducts; the plate-and-frame filter press can save the moving time of the filter plate and improve the cleaning efficiency of the filter plate.

Description

Mother liquor treatment method after electroplating solution evaporation treatment and plate-and-frame filter press used for same

Technical Field

The invention relates to the technical field of waste liquid treatment, in particular to a mother liquid treatment method after electroplating liquid evaporation treatment and a plate-and-frame filter press for the same.

Background

In the production of electrogalvanizing, in order to avoid serious adverse effect on the product quality, a plating solution tank needs to be replaced regularly. For the treatment of waste plating solution, most enterprises directly discharge the waste plating solution to sewage treatment, but the contents of organic matters such as chloride ions, heavy metal zinc, brightening agent, softening agent and the like in the waste plating solution are very high, great adverse effects are brought to a biochemical system of the sewage, and the treatment cost is high. Ion exchange and membrane separation techniques are very costly and are not suitable for treating large volumes of electroplating solution. The chemical precipitation method needs large amount of precipitating agents, produces more sludge, needs additional treatment cost for sludge treatment and has large cost.

Aiming at the waste electroplating solution with large quantity, I invent a treatment process of the waste electroplating solution of the electrogalvanizing. The method comprises the steps of adding waste electroplating solution, potassium permanganate and activated carbon powder into a primary pretreatment reaction tank, filtering liquid in the primary pretreatment reaction tank through a plate-and-frame filter press after full stirring reaction, discharging the filtered liquid into a secondary pretreatment reaction tank, adding potassium permanganate into the secondary pretreatment reaction tank, adding activated carbon powder after full stirring reaction, filtering the liquid in the secondary pretreatment reaction tank through the plate-and-frame filter press after full stirring reaction, feeding the filtered liquid into a to-be-evaporated tank and then into a three-effect evaporator for evaporation, and centrifuging the material to form solid zinc potassium salt and electroplating mother liquor after evaporation of the three-effect evaporator.

However, the yield of the electroplating mother liquor is too high, the mother liquor treatment does not have a good method, a great amount of harmful gas is generated by a burning method, the harmful gas cannot be effectively treated, and the COD content is too high and the treatment is difficult after sewage is discharged.

In addition, when the electroplating mother liquor is treated, a plate-and-frame filter press is generally adopted for filtering, and after the plate-and-frame filter press finishes filtering, the filter plates need to be pulled open through a plate pulling trolley for cleaning, but when the plate pulling trolley of the existing plate-and-frame filter press pulls the cleaned filter plates at the cleaning points, the filter plates at the cleaning points are pulled away by a return stroke, and then the filter plates at the cleaning points are pulled to the cleaning points, and the filter plates can only be pulled open one by one through reciprocating movement, so that the filter plates at the cleaning points cannot be pulled away and the filter plates at the cleaning points are pulled to the cleaning points, which leads to the increase of the time for cleaning the single filter plate.

Disclosure of Invention

The invention aims to solve the problems of difficult treatment of electroplating mother liquor and low plate pulling efficiency of a plate and frame filter press, and provides a mother liquor treatment method after electroplating liquor evaporation treatment and a plate and frame filter press for the same.

The technical scheme of the invention is that the mother solution treatment method after electroplating solution evaporation treatment comprises the following steps:

(1) pumping the electroplating mother liquor of the side a into a reserved pool, adding liquid alkali of the side b, adjusting the pH value to 7-9, and reducing the zinc chloride content in the electroplating mother liquor to below 50 g/L;

(2) and c, adding the electroplating solution into the reserve tank, wherein a: c =1: 1-1.5;

(3) filtering the feed liquid in the reserved tank by using a plate-and-frame filter press to obtain zinc-containing mud and the filtered feed liquid, and pumping the filtered feed liquid into a reaction tank;

(4) d kilograms of potassium permanganate and e kilograms of activated carbon are added into the reaction tank, and stirring reaction is carried out for 1-2h, a: d: e = 30: 3: 8;

(5) and filtering the feed liquid in the reaction tank by using a plate-and-frame filter press to obtain activated carbon sludge and filtered feed liquid, and feeding the filtered feed liquid into a triple-effect evaporator to produce a regenerated potassium chloride product.

Preferably, the activated carbon is wood activated carbon.

Preferably, the a: b =15: 8-10.

The invention also provides a plate-and-frame filter press for the mother liquor treatment method after electroplating solution evaporation treatment, which comprises a frame and a main beam rail fixed on the frame, and further comprises:

the filter plates are arranged on the main beam track and can move on the main beam track, and extension plates are fixed on two sides of each filter plate;

the cleaning support rails are fixed on the rack and positioned on two sides of the main beam rail;

the cleaning and transverse moving mechanism is arranged on the cleaning and supporting track and can move along the cleaning and supporting track, the cleaning and transverse moving mechanism comprises a lower shell, the bottom of the lower shell is provided with a track wheel which is in rolling connection with the cleaning and supporting track, and a moving driving mechanism for driving the track wheel to move is arranged in the lower shell;

the plate pulling mechanism comprises an upper shell fixed at the upper end of a lower shell, an annular conveying guide rail and two limiting guide rails arranged up and down are installed in the upper shell, a first speed reduction stepping motor for driving the annular conveying guide rail to operate is installed in the lower shell, the limiting guide rails are equidistantly arranged on the periphery of the annular conveying guide rail, the annular conveying guide rail comprises a plurality of sliding pieces which move along the track of the annular conveying guide rail and are equidistantly distributed, telescopic material pushing mechanisms are fixedly installed on the sliding pieces, one ends, far away from the sliding pieces, of the telescopic material pushing mechanisms extend out of gaps of the two limiting guide rails, the telescopic material pushing mechanisms are in a compression state far away from an extension plate when being in contact with the limiting guide rails, one sides, facing the pulling plate, of the limiting guide rails are provided with opening areas which are separated from the telescopic material pushing mechanisms so that the telescopic material pushing mechanisms extend out to the extension state and are matched with the extension plate, and the telescopic material pushing mechanisms convey filter plates to be cleaned to cleaning points in the opening areas, conveying the cleaned filter plates at the cleaning points to stacking points, wherein the distances between the cleaning points and the to-be-cleaned points are equal to the distances between the cleaning points and the stacking points;

the telescopic pushing mechanism comprises a spring telescopic rod which is horizontally arranged and connected with a sliding piece, a pushing head is installed at the end of the spring telescopic rod, a clamping groove used for clamping an extension plate is formed in the pushing head, a return pushing plate and a mounting seat are fixed on a telescopic section of the spring telescopic rod, limiting bosses are arranged at the upper end and the lower end of the mounting seat, limiting plates are hinged to the upper end and the lower end of the mounting seat through hinged shafts, a torsional spring is sleeved on the hinged shafts, one end of the torsional spring is connected with the mounting seat, the other end of the torsional spring is connected with the limiting plates, the torsional spring provides torsion for enabling the limiting plates to be abutted against the limiting bosses, and universal balls used for being in rolling connection with limiting guide rails are installed at one end, away from the hinged shafts, of the limiting plates;

carry out abluent lift wiper mechanism to the filter plate of cleaning point department, lift wiper mechanism includes the support of fixed mounting on upper casing, lift actuating mechanism is installed at the support top, slidable mounting has the wash rack that can follow the support and go up and down on the support, the wash rack lower extreme is fixed with the backplate that two symmetries set up, cleaning roller and high-pressure cleaning tube are all installed to the backplate lower part, be close to and be fixed with L shape pole on the backplate of stacking point one side, install on the support with L shape pole and return push pedal complex back and push away drive mechanism, provide the power that drives back and push away drive mechanism motion when L shape pole descends, so that back and push away the back push pedal that drive mechanism promoted stacking point department, make flexible pushing equipment change into compression state by the extension state.

Preferably, the walking driving mechanism comprises a second speed-reducing stepping motor arranged in the lower shell, the output end of the second speed-reducing stepping motor is provided with a first synchronous belt wheel, the shaft end of the rail wheel is provided with a second synchronous belt wheel, and the first synchronous belt wheel is in transmission connection with the second synchronous belt wheel through a first synchronous transmission belt; the rack is also provided with a rack which is horizontally arranged, and the shaft end of the rail wheel is provided with a first gear which is meshed and connected with the rack.

Preferably, the lifting driving mechanism comprises a third speed reduction stepping motor arranged at the center of the top of the support and guide wheels positioned on two sides of the top of the support, the winding wheel is arranged at the output end of the third speed reduction stepping motor, guide grooves are formed in two sides of the support, guide trolleys are fixed on two sides of the top of the cleaning frame, rollers of the guide trolleys are in rolling connection with the guide grooves, pull ropes are arranged on the guide wheels, and the pull ropes are connected with the guide trolleys after bypassing the guide wheels.

Preferably, the high-pressure cleaning pipe is positioned below the cleaning roller, and the spraying direction of the high-pressure cleaning pipe faces to the filter plate at the cleaning point; the cleaning device comprises a protective plate, a pre-cleaning roller, a brush flushing pipe, a water guide sloping plate and a first driven rotating shaft, wherein the protective plate is close to one side of a point to be cleaned and is provided with the pre-cleaning roller, the outer wall of the protective plate, which faces one side of the point to be cleaned, is provided with the pre-cleaning roller, the brush flushing pipe is positioned right above one side of the cleaning roller, which is close to the pre-cleaning roller, and the spraying direction of the brush flushing pipe faces the cleaning roller, the lower part of the protective plate is provided with a water guide port, the water guide sloping plate is fixed at the water guide port, the inclined upper end of the water guide sloping plate extends to the lower part of the cleaning roller, the inclined lower end of the water guide sloping plate extends to the lower part of the pre-cleaning roller, the waste water after the cleaning roller is flushed by the brush flushing pipe is guided to the pre-cleaning roller, and the filter plate at the point to be cleaned is pre-cleaned by the pre-cleaning roller; a second gear is installed at one end, close to one side of a point to be cleaned, of the cleaning roller, a third gear and a first chain wheel are installed on the first driven rotating shaft, the third gear is meshed with the second gear and connected, a second chain wheel is installed at one end of the cleaning roller, and the first chain wheel is in transmission connection with the second chain wheel through a transmission chain.

Preferably, return and push away drive mechanism is including fixing the mounting bracket on the support, install upper fixed pulley on the mounting bracket from top to bottom in proper order, the uide bushing, lower floor's fixed pulley and horizontal guide bar, the uide bushing sets up to two, equal slidable mounting has vertical guide bar in the uide bushing, clamp plate fixed connection is passed through to vertical guide bar upper end, slidable mounting has the slider on the horizontal guide bar, the cover is equipped with the pressure spring on the horizontal guide bar, pressure spring one end is connected the other end with the mounting bracket and is connected with the slider, the slider lower extreme is fixed with be used for with return push pedal complex scraping wings, be connected with wire rope on the clamp plate, the wire rope other end is connected with the slider after walking around upper fixed pulley and lower floor's fixed pulley in proper order.

Preferably, when the cleaning frame descends to the lowest point, the L-shaped rod and the lower pressing plate descend to the lowest point, and the telescopic pushing mechanism is in a compressed state.

Preferably, install the washing actuating mechanism on the wash rack, wash actuating mechanism including installing rotating electrical machines and the second driven rotation axle on the wash rack, all install first belt pulley on the cleaning roller, second belt pulley and fourth gear are installed to the rotating electrical machines output, install fifth gear and third belt pulley in the second driven rotation axle, the fourth gear is connected with fifth gear engagement, the second belt pulley passes through first driving belt with one of them first belt pulley and is connected, the third belt pulley passes through the second driving belt with another first belt pulley and is connected.

The invention has the beneficial effects that:

1. by using the method, the problem of mother liquor production can be solved, the mother liquor can be recycled, the cost for treating the mother liquor is reduced, secondary damage to the environment is avoided, and the secondary zinc oxide finished product and the regenerated potassium chloride product can be produced by using byproducts;

2. the filter plate cleaning efficiency of the plate-and-frame filter press is high, the filter plates at the cleaning point and the to-be-cleaned point can be driven to move at the same time, the filter plates at the cleaning point are moved to the stacking point, the filter plates at the to-be-cleaned point are moved to the cleaning point for cleaning, the filter plate moving time is reduced, and the filter plate cleaning efficiency is improved;

3. the cleaning roller is used for cleaning the filter plate, the brush flushing pipe is used for flushing the cleaning roller, stains on the surface of the cleaning roller are flushed away, the cleaning roller is enabled to better clean the filter plate at the cleaning point, the flushed sewage is guided to the to-be-cleaned roller through the water guide inclined plate, the to-be-cleaned roller is used for pre-cleaning the filter plate at the to-be-cleaned point by utilizing the sewage, the water resource utilization rate is improved, meanwhile, the subsequent cleaning roller is convenient to clean the filter plate, and the cleaning effect on the filter plate is improved.

Drawings

Figure 1 is a front view of a plate and frame filter press according to the present invention;

FIG. 2 is a side cross-sectional view of the present invention;

FIG. 3 is an enlarged view of a portion of the cleaning traversing mechanism, the plate pulling mechanism and the lifting cleaning mechanism of FIG. 2;

FIG. 4 is a top partial schematic view of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 1 at A;

FIG. 6 is a diagram showing the filter plates being cleaned by the lifting and lowering cleaning mechanism;

FIG. 7 is a partial enlarged view at B in FIG. 4;

FIG. 8 is a state diagram of the retractable pusher mechanism passing through the limit guide rail and returning to a compressed state;

FIG. 9 is a schematic view of the structure of the cleaning drive mechanism;

FIG. 10 is a flowchart of a mother liquid treatment method after the plating liquid evaporation treatment;

in the figure, 1, a frame; 2. a main beam track; 3. filtering the plate; 4. an extension plate; 5. cleaning the support rail; 6. a lower shell; 7. a rail wheel; 8. an upper shell; 9. an annular conveying guide rail; 10. limiting the guide rail; 11. a first deceleration stepping motor; 12. a sliding member; 13. an open area; 14. points to be cleaned; 15. cleaning points; 16. stacking points; 17. a spring telescopic rod; 18. a material pushing head; 19. a card slot; 20. returning the push plate; 21. a mounting seat; 22. a limiting boss; 23. hinging a shaft; 24. a limiting plate; 25. a torsion spring; 26. a ball transfer unit; 27. a support; 28. a cleaning frame; 29. a guard plate; 30. cleaning the roller; 31. a high pressure cleaning pipe; 32. an L-shaped rod; 33. a second reduction stepping motor; 34. a first timing pulley; 35. a second timing pulley; 36. a first synchronous belt; 37. a rack; 38. a first gear; 39. a third reduction stepping motor; 40. a guide wheel; 41. a winding wheel; 42. a guide groove; 43. a guiding trolley; 44. pulling a rope; 45. a second drive belt; 46. pre-cleaning the roller; 47. a brush flushing pipe; 48. a water guide sloping plate; 49. a first driven rotating shaft; 50. a water guide port; 51. a second gear; 52. a third gear; 53. a first sprocket; 54. a second sprocket; 55. a drive chain; 56. a mounting frame; 57. an upper fixed pulley; 58. a guide sleeve; 59. a lower fixed pulley; 60. a lateral guide bar; 61. a vertical guide bar; 62. pressing a plate; 63. a slider; 64. a pressure spring; 65. a material pushing plate; 66. a wire rope; 67. a rotating electric machine; 68. a second driven rotating shaft; 69. a first pulley; 70. a second pulley; 71. a fourth gear; 72. a fifth gear; 73. a third belt pulley; 74. a first drive belt.

Detailed Description

The invention is described in detail below with reference to the attached drawing

Example 1

As shown in fig. 10: a mother liquor treatment method after electroplating solution evaporation treatment comprises the following steps:

(1) adding 15 square of electroplating mother liquor into the reserved pool, adding 9 square of liquid alkali, adjusting the pH value to 8, and reducing the content of zinc chloride in the electroplating mother liquor to below 50; according to the viscosity of the feed liquid, liquid caustic soda can be slowly added, so that the phenomenon that the feed liquid is viscous and cannot be stirred due to the excessively high liquid caustic soda adding speed is avoided;

(2) adding 15 parts of electroplating solution into the reserve tank; the viscosity of the feed liquid can be adjusted by adding electroplating liquid, the feed liquid is prevented from being too thick, and the difficulty in filtering of a plate-and-frame filter press is avoided;

(3) filtering the feed liquid in the reserved tank by using a plate-and-frame filter press to obtain zinc-containing mud and the filtered feed liquid, and pumping the filtered feed liquid into a reaction tank; the zinc-containing mud can be sent to a secondary zinc oxide workshop to produce a secondary zinc oxide finished product;

(4) adding 1.5 kg of potassium permanganate and 4 kg of activated carbon into the reaction tank, wherein the activated carbon is wood activated carbon, and stirring for reaction for 2 hours; the material is yellowed due to the electroplating mother liquor, and the active carbon is added to adsorb organic matters, so that the feed liquid is prevented from being too yellow; potassium permanganate is added to react with the iron element, so that the iron content in the feed liquid can be further reduced;

(5) and filtering the feed liquid in the reaction tank by using a plate-and-frame filter press to obtain activated carbon sludge and filtered feed liquid, and feeding the filtered feed liquid into a triple-effect evaporator to produce a regenerated potassium chloride product.

By the mother liquor treatment method after electroplating liquid evaporation treatment, the problem of mother liquor production can be solved, the mother liquor can be recycled, the cost for treating the mother liquor is reduced, and secondary damage to the environment is avoided.

The invention also provides a plate-and-frame filter press for a mother liquor treatment method after electroplating solution evaporation treatment, which comprises a frame 1 and a main beam rail 2 fixed on the frame 1, and further comprises:

a plurality of filter plates 3 which are arranged on the main beam track 2 and can move on the main beam track 2, and extension plates 4 are fixed on two sides of each filter plate 3; the filter plate 3 is used for filtering wastewater, the filter plate 3 is provided with a roller part rolling on the main beam track 2, and the extension plates 4 on two sides of the filter plate 3 are in contact fit with the plate pulling mechanism so as to be pulled by the plate pulling mechanism to move;

the cleaning support rail 5 is fixed on the rack 1, and the cleaning support rail 5 is positioned at two sides of the main beam rail 2; the cleaning support rail 5 and the main beam rail 2 are both provided with two rails so as to support the cleaning transverse moving mechanism at the upper part of the cleaning support rail in parallel;

the cleaning and transverse moving mechanism is arranged on the cleaning and supporting track 5 and can move along the cleaning and supporting track 5, the cleaning and transverse moving mechanism comprises a lower shell 6, the bottom of the lower shell 6 is provided with a track wheel 7 which is in rolling connection with the cleaning and supporting track 5, and a moving driving mechanism for driving the track wheel 7 to move is arranged in the lower shell 6; the cleaning traversing mechanisms on the two cleaning support rails 5 work synchronously, and the track wheels 7 are driven to rotate by the traveling driving mechanism, so that the track wheels 7 move on the cleaning support rails 5;

the plate pulling mechanism comprises an upper shell 8 fixed at the upper end of a lower shell 6, an annular conveying guide rail 9 and two limiting guide rails 10 arranged up and down are arranged in the upper shell 8, a first speed reducing stepping motor 11 for driving the annular conveying guide rail 9 to operate is arranged in the lower shell 6, the limiting guide rails 10 are equidistantly arranged on the periphery of the annular conveying guide rail 9, the annular conveying guide rail 9 comprises a plurality of sliding pieces 12 which move along the track of the annular conveying guide rail and are distributed at equal intervals, telescopic material pushing mechanisms are fixedly arranged on the sliding pieces 12, one ends of the telescopic material pushing mechanisms, far away from the sliding pieces 12, extend out from gaps between the two limiting guide rails 10, the telescopic material pushing mechanisms are in a compression state far away from an extension plate 4 when being in contact with the limiting guide rails 10, and an opening area 13 which is separated from the telescopic material pushing mechanisms to enable the telescopic material pushing mechanisms to extend out to the extension state and to be matched with the extension plate 4 is arranged on one side of the limiting guide rails 10 facing the plate, the telescopic pushing mechanism conveys the filter plates 3 of the to-be-cleaned points 14 to the cleaning points 15 in the opening area 13, conveys the filter plates 3 cleaned at the cleaning points 15 to the stacking points 16, and the distances between the cleaning points 15 and the to-be-cleaned points 14 are equal to the distances between the cleaning points 16 and the stacking points 16;

the annular conveying guide rail 9 drives the telescopic pushing mechanism to move for a fixed distance, so that the telescopic pushing mechanism of the point to be cleaned 14 drives the filter plate 3 to move to the cleaning point 15, the telescopic pushing mechanism at the cleaning point 15 drives the cleaned filter plate 3 to move to the stacking point 16, and 8 telescopic pushing mechanisms are arranged at equal intervals, so that the circular operation is realized;

the telescopic pushing mechanism comprises a spring telescopic rod 17 which is horizontally arranged and connected with the sliding piece 12, a pushing head 18 is installed at the end head of the spring telescopic rod 17, a clamping groove 19 for clamping the extension plate 4 is formed in the pushing head 18, a return pushing plate 20 and a mounting seat 21 are fixed on the telescopic section of the spring telescopic rod 17, limiting bosses 22 are arranged at the upper end and the lower end of the mounting seat 21, limiting plates 24 are hinged to the upper end and the lower end of the mounting seat 21 through hinge shafts 23, torsion springs 25 are sleeved on the hinge shafts 23, one ends of the torsion springs 25 are connected with the mounting seat 21, the other ends of the torsion springs are connected with the limiting plates 24, the torsion springs 25 provide torsion force for enabling the limiting plates 24 to be abutted against the limiting bosses 22, and universal balls 26 for being in rolling connection with the limiting guide rails 10 are installed at the ends, away from the hinge shafts 23, of the limiting plates 24;

the lifting cleaning mechanism is used for cleaning the filter plates 3 at the cleaning points 15 and comprises a support 27 fixedly mounted on the upper shell 8, a lifting driving mechanism is mounted at the top of the support 27, a cleaning frame 28 capable of lifting along the support 27 is slidably mounted on the support 27, two symmetrically-arranged guard plates 29 are fixed at the lower end of the cleaning frame 28, cleaning rollers 30 and high-pressure cleaning pipes 31 are mounted at the lower parts of the guard plates 29, an L-shaped rod 32 is fixed on the guard plate 29 close to one side of the stacking point 16, a push-back transmission mechanism matched with the L-shaped rod 32 and the push-back plate 20 is mounted on the support 27, and power for driving the push-back transmission mechanism to move is provided when the L-shaped rod 32 descends, so that the push-back transmission mechanism pushes the push-back plate 20 at the stacking point 16, and the telescopic material pushing mechanism is changed from an extension state to a compression state.

The cleaning transverse moving mechanism drives the pulling plate mechanism to integrally move for a section of displacement each time, the displacement is the width of the filter plate 3, meanwhile, the annular conveying guide rail 9 drives the telescopic pushing mechanism to move for a section of fixed displacement through the sliding piece 12, and the displacement is the distance between the adjacent sliding pieces 12; after the cleaning traversing mechanism is in a static state after moving, the telescopic pushing mechanism at the cleaning point 14 moves to the cleaning point 15, the extending plate 4 is pushed by the pushing head 18 to push the filter plate 3 to the cleaning point 15, and the telescopic pushing mechanism at the cleaning point 15 drives the cleaned filter plate 3 to move to the stacking point 16; meanwhile, the next telescopic pushing mechanism at the point 14 to be cleaned moves to the position where the universal ball 26 is separated from the limiting guide rail 10 and enters the opening area 13, under the action of the elastic restoring force of the spring telescopic rod 17, the spring telescopic rod 17 extends out to drive the pushing head 18 to move to the position of the filter plate 3 of the point 14 to be cleaned, and the clamping groove 19 clamps the extension plate 4; at the moment, the annular conveying guide rail 9 stops moving intermittently, the lifting driving mechanism of the lifting cleaning mechanism drives the cleaning frame 28 to descend, the cleaning roller 30 cleans the filter plates 3 at the cleaning points 15, the high-pressure cleaning pipe 31 washes the filter plates 3, the L-shaped rod 32 descends to be in motion contact with the back-pushing transmission mechanism in the descending process of the cleaning frame 28 to provide motion power for the back-pushing transmission mechanism, the back-pushing transmission mechanism pushes the back-pushing plate 20 at the stacking points 16 to enable the telescopic material pushing mechanism to be changed from an extension state to a compression state, and when the telescopic material pushing mechanism moves again, the material pushing head 18 cannot be in contact with the extension plate 4, so that interference is avoided.

The walking driving mechanism comprises a second speed-reducing stepping motor 33 arranged in the lower shell 6, the output end of the second speed-reducing stepping motor 33 is provided with a first synchronous belt wheel 34, the shaft end of the rail wheel 7 is provided with a second synchronous belt wheel 35, and the first synchronous belt wheel 34 and the second synchronous belt wheel 35 are in transmission connection through a first synchronous transmission belt 36; the rack 1 is also provided with a horizontally arranged rack 37, and the shaft end of the rail wheel 7 is provided with a first gear 38 which is meshed and connected with the rack 37.

The second speed-reducing stepping motor 33 moves the second synchronous pulley 35, the rail wheel 7 and the first gear 38 through the first synchronous pulley 34 and the first synchronous transmission belt 36, and the first gear 38 moves on the rack 37, so that the second speed-reducing stepping motor 33 can accurately drive the rail wheel 7 to move and fixedly displace on the cleaning support rail 5, and the filter plates 3 can be accurately cleaned.

The lifting driving mechanism comprises a third speed reducing stepping motor 39 arranged at the center of the top of the support 27 and guide wheels 40 positioned on two sides of the top of the support 27, a winding wheel 41 is arranged at the output end of the third speed reducing stepping motor 39, guide grooves 42 are formed in two sides of the support 27, guide trolleys 43 are fixed on two sides of the top of the cleaning frame 28, rollers of the guide trolleys 43 are in rolling connection with the guide grooves 42, pull ropes 44 are arranged on the guide wheels 40, and the pull ropes 44 are connected with the guide trolleys 43 after bypassing the guide wheels 40.

The third speed-reducing stepping motor 39 drives the two guide trolleys 43 to synchronously ascend and descend through the winding wheel 41 and the pull rope 44 bypassing the guide wheel 40, and further drives the cleaning frame 28 to smoothly ascend and descend in the guide groove 42.

The high-pressure cleaning pipe 31 is positioned below the cleaning roller 30, and the spraying direction of the high-pressure cleaning pipe faces the filter plate 3 at the cleaning point 15; a pre-cleaning roller 46, a brush washing pipe 47, a water guide sloping plate 48 and a first driven rotating shaft 49 are arranged on the guard plate 29 close to one side of the point to be cleaned 14, the pre-cleaning roller 46 is arranged on the outer wall of the guard plate 29 towards one side of the point to be cleaned 14, the brush washing pipe 47 is positioned right above one side of the cleaning roller 30 close to the pre-cleaning roller 46, the spraying direction of the brush washing pipe is towards the cleaning roller 30, a water guide opening 50 is arranged at the lower part of the guard plate 29, the water guide sloping plate 48 is fixed at the water guide opening 50, the inclined upper end of the water guide sloping plate 48 extends to the lower part of the cleaning roller 30, the inclined lower end of the water guide sloping plate 48 extends to the lower part of the pre-cleaning roller 46, the water guide sloping plate 48 guides the waste water after the cleaning roller 30 is cleaned by the brush washing pipe 47 to the pre-cleaning roller 46, and the pre-cleaning roller 46 pre-cleans the filter plates 3 of the point to be cleaned 14; a second gear 51 is installed at one end of the cleaning roller 30 close to one side of the point 14 to be cleaned, a third gear 52 and a first chain wheel 53 are installed on the first driven rotating shaft 49, the third gear 52 is meshed with the second gear 51, a second chain wheel 54 is installed at one end of the roller 30 to be cleaned, and the first chain wheel 53 is in transmission connection with the second chain wheel 54 through a transmission chain 55.

Push back drive mechanism is including fixing the mounting bracket 56 on support 27, install upper fixed pulley 57 from top to bottom on the mounting bracket 56 in proper order, uide bushing 58, lower floor's fixed pulley 59 and horizontal guide bar 60, uide bushing 58 sets up to two, equal slidable mounting has vertical guide bar 61 in the uide bushing 58, clamp plate 62 fixed connection is passed through to vertical guide bar 61 upper end, slidable mounting has slider 63 on the horizontal guide bar 60, the cover is equipped with pressure spring 64 on the horizontal guide bar 60, pressure spring 64 one end is connected the other end with mounting bracket 56 and is connected with slider 63, the slider 63 lower extreme is fixed with be used for with push back board 20 complex scraping wings 65, be connected with wire rope 66 on the clamp plate 62, wire rope 66 is connected with slider 63 after walking around upper fixed pulley 57 and lower floor's fixed pulley 59 in proper order to the other end.

When the cleaning frame 28 descends to the lowest point, the L-shaped rod 32 and the lower pressing plate 62 descend to the lowest point, and the telescopic pushing mechanism is in a compressed state.

Install the washing actuating mechanism on the wash rack 28, wash actuating mechanism including installing rotating electrical machines 67 and the second driven spindle 68 on the wash rack 28, all install first belt pulley 69 on the cleaning roller 30, second belt pulley 70 and fourth gear 71 are installed to the rotating electrical machines 67 output, install fifth gear 72 and third belt pulley 73 on the second driven spindle 68, fourth gear 71 is connected with the meshing of fifth gear 72, second belt pulley 70 is connected through first driving belt 74 with one of them first belt pulley 69, third belt pulley 73 is connected through second driving belt 45 with another first belt pulley 69.

The lifting driving mechanism drives the cleaning frame 28 to descend to clean the filter plates 3 at the cleaning points 15, the descending position of the cleaning frame 28 can be judged according to the angular displacement output by the third speed reducing stepping motor 39, when the cleaning rollers 30 are lowered to a position where they contact the filter plates 3 at the cleaning points 15, the rotating motor 67 is turned on, the high-pressure cleaning pipe 31 supplies high-pressure water, the rotating motor 67 rotates the first pulley 69 and a corresponding one of the cleaning rollers 30 via the second pulley 70 and the first transmission belt 74, the rotating motor 67 rotates the fifth gear 72, the second driven rotation shaft 68 and the third pulley 73 in the reverse direction via the fourth gear 71, the third pulley 73 rotates the other first pulley 69 and a corresponding one of the cleaning rollers 30 via the second transmission belt 45, cleaning the filter plate 3 at the cleaning point 15, and making the rotation directions of the two cleaning rollers 30 opposite, so as to wash dirt on the filter plate 3 downwards; the brush washing pipe 47 washes the cleaning roller 30 to wash away stains on the surface of the cleaning roller 30, so that the cleaning roller 30 can better clean the filter plates 3 at the cleaning points 15, the waste water washed by the cleaning roller 30 through the brush washing pipe 47 is guided to the pre-cleaning roller 46 through the water guide sloping plate 48 and the water guide opening 50, the cleaning roller 30 drives the third gear 52, the first driven rotating shaft 49 and the first chain wheel 53 to rotate through the second gear 51, the first chain wheel 53 drives the pre-cleaning roller 46 to rotate through the transmission chain 55 and the second chain wheel 54, so that the pre-cleaning roller 46 and the cleaning roller 30 reversely rotate, so that the pre-cleaning roller 46 can clean the filter plate 3, the pre-cleaning roller 46 can pre-clean the filter plate 3 of the point to be cleaned 14 after being stained with sewage, by pre-cleaning the filter plate 3 of the point to be cleaned 14 by using sewage, the utilization rate of water resources can be improved, and meanwhile, the filter plate 3 is convenient to be subsequently re-cleaned;

when the cleaning roller 30 descends to the bottom of the filter plate 3, the L-shaped rod 32 is in contact fit with the pressure plate 62, the overall weight of the cleaning frame 28 and the elements which ascend and descend along with the cleaning frame 28 is much larger than the force which needs to overcome the compression of the pressure spring 64, so that the L-shaped rod 32 can drive the pressure plate 62 to descend, under the guiding action of the guide sleeve 58 and the vertical guide rod 61, the pressure plate 62 descends stably and pulls the sliding block 63 to move transversely towards the bracket 27 through the steel wire rope 66, the pressure spring 64 compresses, the material pushing plate 65 moves along with the sliding block 63 and contacts with the material pushing plate 20 to push the material pushing plate 20 to move, the spring telescopic rod 17 is compressed, the limit plate 24 moves towards the limit guide rail 10, when the limit plate 24 contacts with the limit guide rail 10, the torsion spring 25 deforms under the force, so that the limit plate 24 rotates to pass through the gap between the two limit guide rails 10, when the limit guide rail 10 moves to pass through the two limit guide rails 10, the cleaning rack 28 and the L-shaped rod 32 are also lowered to the lowest position, then the cleaning rack 28 and the L-shaped rod 32 are lifted and do not press the pressing plate 62 any more, the limiting plate 24 is reset to be abutted against the limiting boss 22 again under the action of the elastic restoring force of the torsion spring 25, the universal ball 26 is right opposite to the corresponding limiting guide rail 10, the universal ball 26 is rigidly abutted against the limiting guide rail 10 under the action of the elastic restoring force of the spring telescopic rod 17 and the limiting action of the limiting boss 22 on the limiting plate 24, so that the resetting of the material pushing head 18 is limited, and the contact interference with the cleaned and stacked filter plates 3 is avoided when the material pushing head 18 at the re-stacking point 16 moves again; under the action of the elastic restoring force of the compression spring 64, the compression spring 64 pushes the sliding block 63 to reset, and then the pressing plate 62 is driven to reset.

Example 2

This example is substantially the same as example 1, except that the mother liquor treatment method after the plating liquid evaporation treatment comprises the steps of:

(1) adding 15 square of electroplating mother liquor into the reserved pool, adding 8 square of liquid alkali, adjusting the pH value to 7, and reducing the content of zinc chloride in the electroplating mother liquor to below 50;

(2) adding 16 parts of electroplating solution into the reserve tank;

(3) filtering the feed liquid in the reserved tank by using a plate-and-frame filter press to obtain zinc-containing mud and the filtered feed liquid, and pumping the filtered feed liquid into a reaction tank;

(4) adding 1.5 kg of potassium permanganate and 4 kg of activated carbon into the reaction tank, wherein the activated carbon is wood activated carbon, and stirring for reaction for 2 hours;

(5) and filtering the feed liquid in the reaction tank by using a plate-and-frame filter press to obtain activated carbon sludge and filtered feed liquid, and feeding the filtered feed liquid into a triple-effect evaporator to produce a regenerated potassium chloride product.

Example 3

This example is substantially the same as example 1, except that the mother liquor treatment method after the plating liquid evaporation treatment comprises the steps of:

(1) adding 15 square of electroplating mother liquor into the reserved pool, adding 10 square of liquid alkali, adjusting the pH value to 9, and reducing the content of zinc chloride in the electroplating mother liquor to below 50;

(2) adding 18 parts of electroplating solution into the reserve tank;

(3) filtering the feed liquid in the reserved tank by using a plate-and-frame filter press to obtain zinc-containing mud and the filtered feed liquid, and pumping the filtered feed liquid into a reaction tank;

(4) adding 1.5 kg of potassium permanganate and 4 kg of activated carbon into the reaction tank, wherein the activated carbon is wood activated carbon, and stirring for reaction for 2 hours;

(5) and filtering the feed liquid in the reaction tank by using a plate-and-frame filter press to obtain activated carbon sludge and filtered feed liquid, and feeding the filtered feed liquid into a triple-effect evaporator to produce a regenerated potassium chloride product.

The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.

Claims (8)

1. The utility model provides a plate and frame filter press, includes the frame and fixes the girder track in the frame, its characterized in that still includes:

the filter plates are arranged on the main beam track and can move on the main beam track, and extension plates are fixed on two sides of each filter plate;

the cleaning support rails are fixed on the rack and positioned on two sides of the main beam rail;

the cleaning and transverse moving mechanism is arranged on the cleaning and supporting track and can move along the cleaning and supporting track, the cleaning and transverse moving mechanism comprises a lower shell, the bottom of the lower shell is provided with a track wheel which is in rolling connection with the cleaning and supporting track, and a moving driving mechanism for driving the track wheel to move is arranged in the lower shell;

the plate pulling mechanism comprises an upper shell fixed at the upper end of a lower shell, an annular conveying guide rail and two limiting guide rails arranged up and down are installed in the upper shell, a first speed reduction stepping motor for driving the annular conveying guide rail to operate is installed in the lower shell, the limiting guide rails are equidistantly arranged on the periphery of the annular conveying guide rail, the annular conveying guide rail comprises a plurality of sliding pieces which move along the track of the annular conveying guide rail and are equidistantly distributed, telescopic material pushing mechanisms are fixedly installed on the sliding pieces, one ends, far away from the sliding pieces, of the telescopic material pushing mechanisms extend out of gaps of the two limiting guide rails, the telescopic material pushing mechanisms are in a compression state far away from an extension plate when being in contact with the limiting guide rails, one sides, facing the pulling plate, of the limiting guide rails are provided with opening areas which are separated from the telescopic material pushing mechanisms so that the telescopic material pushing mechanisms extend out to the extension state and are matched with the extension plate, and the telescopic material pushing mechanisms convey filter plates to be cleaned to cleaning points in the opening areas, conveying the cleaned filter plates at the cleaning points to stacking points, wherein the distances between the cleaning points and the to-be-cleaned points are equal to the distances between the cleaning points and the stacking points;

the telescopic pushing mechanism comprises a spring telescopic rod which is horizontally arranged and connected with a sliding piece, a pushing head is installed at the end of the spring telescopic rod, a clamping groove used for clamping an extension plate is formed in the pushing head, a return pushing plate and a mounting seat are fixed on a telescopic section of the spring telescopic rod, limiting bosses are arranged at the upper end and the lower end of the mounting seat, limiting plates are hinged to the upper end and the lower end of the mounting seat through hinged shafts, a torsional spring is sleeved on the hinged shafts, one end of the torsional spring is connected with the mounting seat, the other end of the torsional spring is connected with the limiting plates, the torsional spring provides torsion for enabling the limiting plates to be abutted against the limiting bosses, and universal balls used for being in rolling connection with limiting guide rails are installed at one end, away from the hinged shafts, of the limiting plates;

the lifting cleaning mechanism comprises a support fixedly mounted on an upper shell, a lifting driving mechanism is mounted at the top of the support, a cleaning frame capable of lifting along the support is mounted on the support in a sliding mode, two symmetrically arranged guard plates are fixed at the lower end of the cleaning frame, a cleaning roller and a high-pressure cleaning pipe are mounted at the lower portions of the guard plates, an L-shaped rod is fixed on the guard plate on one side close to the stacking point, a push-back transmission mechanism matched with the L-shaped rod and the push-back plate is mounted on the support, and power for driving the push-back transmission mechanism to move is provided when the L-shaped rod descends, so that the push-back transmission mechanism pushes the push-back plate at the stacking point, and the telescopic material pushing mechanism is changed into a compression state from an extension state;

the lifting driving mechanism comprises a third speed-reducing stepping motor arranged at the center of the top of the support and guide wheels positioned on two sides of the top of the support, the output end of the third speed-reducing stepping motor is provided with a winding wheel, two sides of the support are provided with guide grooves, two sides of the top of the cleaning frame are fixedly provided with guide trolleys, rollers of the guide trolleys are in rolling connection with the guide grooves, pull ropes are arranged on the guide wheels, and the pull ropes are connected with the guide trolleys after bypassing the guide wheels;

the high-pressure cleaning pipe is positioned below the cleaning roller, and the spraying direction of the high-pressure cleaning pipe faces to the filter plate at the cleaning point; the cleaning device comprises a protective plate, a pre-cleaning roller, a brush flushing pipe, a water guide sloping plate and a first driven rotating shaft, wherein the protective plate is close to one side of a point to be cleaned and is provided with the pre-cleaning roller, the outer wall of the protective plate, which faces one side of the point to be cleaned, is provided with the pre-cleaning roller, the brush flushing pipe is positioned right above one side of the cleaning roller, which is close to the pre-cleaning roller, and the spraying direction of the brush flushing pipe faces the cleaning roller, the lower part of the protective plate is provided with a water guide port, the water guide sloping plate is fixed at the water guide port, the inclined upper end of the water guide sloping plate extends to the lower part of the cleaning roller, the inclined lower end of the water guide sloping plate extends to the lower part of the pre-cleaning roller, the waste water after the cleaning roller is flushed by the brush flushing pipe is guided to the pre-cleaning roller, and the filter plate at the point to be cleaned is pre-cleaned by the pre-cleaning roller; a second gear is installed at one end, close to one side of a point to be cleaned, of the cleaning roller, a third gear and a first chain wheel are installed on the first driven rotating shaft, the third gear is meshed with the second gear and connected, a second chain wheel is installed at one end of the cleaning roller, and the first chain wheel is in transmission connection with the second chain wheel through a transmission chain.

2. The plate-and-frame filter press according to claim 1, wherein the traveling driving mechanism comprises a second deceleration stepping motor installed in the lower housing, a first synchronous pulley is installed at the output end of the second deceleration stepping motor, a second synchronous pulley is installed at the shaft end of the rail wheel, and the first synchronous pulley and the second synchronous pulley are in transmission connection through a first synchronous transmission belt; the rack is also provided with a rack which is horizontally arranged, and the shaft end of the rail wheel is provided with a first gear which is meshed and connected with the rack.

3. The plate-and-frame filter press according to claim 1, wherein the push-back transmission mechanism comprises a mounting frame fixed on the support, an upper fixed pulley, a guide sleeve, a lower fixed pulley and two transverse guide rods are sequentially mounted on the mounting frame from top to bottom, a vertical guide rod is slidably mounted in the guide sleeve, the upper end of the vertical guide rod is fixedly connected with the pressing plate, a sliding block is slidably mounted on the transverse guide rod, a pressure spring is sleeved on the transverse guide rod, one end of the pressure spring is connected with the mounting frame, the other end of the pressure spring is connected with the sliding block, a push plate matched with the push-back plate is fixed at the lower end of the sliding block, a steel wire rope is connected onto the pressing plate, and the other end of the steel wire rope is connected with the sliding block after sequentially bypassing the upper fixed pulley and the lower fixed pulley.

4. The filter press according to claim 3, wherein when the cleaning frame descends to the lowest point, the L-shaped rod and the pressing plate are pushed to the lowest point, and the telescopic pushing mechanism is in a compressed state.

5. The filter press according to claim 1, wherein the cleaning frame is provided with a cleaning driving mechanism, the cleaning driving mechanism comprises a rotating motor and a second driven rotating shaft which are arranged on the cleaning frame, the cleaning rollers are provided with first belt pulleys, the output end of the rotating motor is provided with a second belt pulley and a fourth gear, the second driven rotating shaft is provided with a fifth gear and a third belt pulley, the fourth gear is meshed with the fifth gear, the second belt pulley is connected with one of the first belt pulleys through a first transmission belt, and the third belt pulley is connected with the other first belt pulley through a second transmission belt.

6. A method for treating mother liquor after plating solution evaporation treatment by using a plate and frame filter press according to claim 1, which comprises the following steps:

(1) pumping the electroplating mother liquor of the side a into a reserved pool, adding liquid alkali of the side b, adjusting the pH value to 7-9, and reducing the zinc chloride content in the electroplating mother liquor to below 50 g/L;

(2) and c, adding the electroplating solution into the reserve tank, wherein a: c =1: 1-1.5;

(3) filtering the feed liquid in the reserved tank by using a plate-and-frame filter press to obtain zinc-containing mud and the filtered feed liquid, and pumping the filtered feed liquid into a reaction tank;

(4) d kilograms of potassium permanganate and e kilograms of activated carbon are added into the reaction tank, and stirring reaction is carried out for 1-2h, a: d: e = 30: 3: 8;

(5) and filtering the feed liquid in the reaction tank by using a plate-and-frame filter press to obtain activated carbon sludge and filtered feed liquid, and feeding the filtered feed liquid into a triple-effect evaporator to produce a regenerated potassium chloride product.

7. A process according to claim 6, characterized in that the activated carbon is wood activated carbon.

8. A processing method according to claim 6, characterized in that the a: b =15: 8-10.

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