CN217972968U

CN217972968U - Filter pressing system for electroplating sludge

Info

Publication number: CN217972968U
Application number: CN202221536595.9U
Authority: CN
Inventors: 吴健; 黄炜; 费西凯; 李凯军; 黄伟平
Original assignee: Quanzhou Cecep Water Treatment Technology Co ltd
Current assignee: Quanzhou Cecep Water Treatment Technology Co ltd
Priority date: 2022-06-18
Filing date: 2022-06-18
Publication date: 2022-12-06
Anticipated expiration: 2032-06-18

Abstract

The application relates to a filter pressing system for electroplating sludge, which comprises a reaction tank, a concentration tank and a filter press which are sequentially arranged along a conveying direction, wherein the reaction tank and the concentration tank, and the concentration tank and the filter press are communicated with each other through sewage discharge pipelines; the reaction tank is connected with a water inlet pipe for introducing electroplating wastewater, and the reaction tank and the concentration tank are both provided with a medicine adding channel for adding PAC and PAM; the reaction tank and the concentration tank are respectively connected with a water pumping pipe for pumping water away from the upper layer, and each water pumping pipe is provided with a water pumping pump. The utility model provides a filter-pressing system of electroplating mud can reduce the moisture content in the electroplating mud to the follow-up operation of handling of mud is convenient for.

Description

Filter pressing system for electroplating sludge

Technical Field

The application relates to the technical field of electroplating sludge treatment, in particular to a filter pressing system for electroplating sludge.

Background

The electroplating wastewater generated in the electroplating process contains heavy metal ions such as phosphorus, nickel, copper and the like, which belong to carcinogenic and teratogenic highly toxic substances, and the direct discharge causes great harm to the environment; electroplating sludge is formed after the electroplating wastewater is treated, and at present, a landfill method is generally adopted, wherein the electroplating sludge is made into a large block-shaped body and then is buried, or the electroplating sludge is smelted to obtain a metal melt and slag.

The existing sludge-water separation operation of electroplating sludge generally adopts the steps of mixing PAC (polyaluminium chloride), PAM (polyacrylamide) and electroplating wastewater in a reaction tank for precipitation and coagulation reaction, precipitating the precipitated and coagulated sludge at the bottom of the reaction tank, then pumping out the deslimed water on the upper layer of the sludge through a pumping device, thereby completing sludge-water separation, and preparing the obtained sludge into a large block for landfill or smelting treatment.

In view of the above-mentioned related art, the inventors consider that the following drawbacks exist: the water content of the sludge obtained by adding PAC and PAM into the electroplating wastewater for precipitation and condensation reaction is higher, and inconvenience is caused to the treatment of the subsequent sludge.

SUMMERY OF THE UTILITY MODEL

In order to reduce the moisture content in the electroplating sludge, the application provides a filter-pressing system of electroplating sludge.

The application provides a filter-pressing system of electroplating mud adopts following technical scheme:

a filter pressing system for electroplating sludge comprises a reaction tank, a concentration tank and a filter press which are sequentially arranged along a conveying direction, wherein the reaction tank and the concentration tank, and the concentration tank and the filter press are communicated with each other through sewage discharge pipelines; the reaction tank is connected with a water inlet pipe for introducing electroplating wastewater, and the reaction tank and the concentration tank are both provided with a medicine adding channel for adding PAC and PAM; the reaction tank and the concentration tank are respectively connected with water pumping pipes for pumping water away from the upper layer, and each water pumping pipe is provided with a water pumping pump.

By adopting the technical scheme, when sludge and water in the electroplating wastewater are subjected to sludge-water separation operation, the electroplating wastewater is introduced into the reaction tank through the water inlet pipe, then PAC and PAM are added into the reaction tank through the medicine feeding channel to perform precipitation and condensation reactions with the electroplating wastewater, the precipitated and condensed sludge is deposited at the bottom of the reaction tank under the action of self gravity, the deslimed water on the upper layer of the sludge is pumped away through the water pumping pipe, and the sludge is conveyed to the concentration tank through the sewage discharge pipeline, so that the first sludge-water separation operation is completed; adding PAM and sludge into the concentration tank through a medicine adding channel for condensation reaction again, continuously pumping the reacted deslimed water out through a water pumping pipe on the concentration tank, and then conveying the sludge to a filter press through a sewage discharge pipeline to finish a second sludge-water separation operation; carrying out a third mud-water separation operation on the sludge conveyed to the filter press under the action of the filter press; through three mud-water separation processes, the water content in the sludge is further reduced, so that the subsequent treatment operation of the sludge is facilitated.

Optionally, the openings of the water inlet ends of all the water pumping pipes are vertically downward and extend into the reaction tank or the concentration tank, and the peripheral wall of the inlet end of each water pumping pipe is connected with a lengthening pipe in a sliding manner; the outer peripheral wall of the lengthened pipe is fixed with a floating block, and the sum of the gravity of the floating block and the lengthened pipe is smaller than the buoyancy of the electroplating wastewater.

Through adopting foretell technical scheme, setting through the extension pipe, the kicking block of extension pipe can float in electroplating effluent's the surface of water, the drinking-water pipe is taken out from the in-process of the muddy water that takes off on mud upper strata, make the muddy water level that takes off of reaction tank or concentrated pond descend, the kicking block is following the decline this moment, drive the extension pipe and remove towards the bottom of the pool that is close to the reaction tank or the bottom of the pool in concentrated pond, make the end of intaking of extension pipe can continuously keep contacting the surface of water that takes off muddy water, and then make the drinking-water pipe can continuously draw water, reduce the drinking-water pipe and draw water in-process water level decline and make the entrance point of drinking-water pipe exceed the surface of water and the possibility that can't draw water.

Optionally, the bottom surface of the floating block is higher than the end surface of the inlet end of the elongated tube.

By adopting the technical scheme, the bottom surface of the floating block is arranged to be higher than the water inlet end of the lengthened pipe, so that when the floating block floats on the water surface of the deslimed water, the water inlet end of the lengthened pipe is always kept to be partially inserted into the water surface of the deslimed water, and the possibility that the water inlet end of the lengthened pipe is higher than the water surface of the deslimed water and cannot be pumped to the deslimed water is reduced.

Optionally, the outer wall of the floating block is coated with a corrosion-resistant layer.

Through adopting foretell technical scheme, through the setting of corrosion-resistant layer, coat the outer wall in the floating block with the corrosion-resistant layer that has corrosion-resistant effect, can play the effect of protection floating block, improve the life of floating block.

Optionally, the periphery wall of the end of intaking of drinking water pipe is fixed with first retaining ring, the one end that the extension pipe is close to the drinking water pipe is fixed with the second retaining ring, the internal diameter of second retaining ring is less than the internal diameter of extension pipe and the internal diameter of second retaining ring is less than the external diameter of first retaining ring.

Through adopting foretell technical scheme, through the setting of first retaining ring and second retaining ring, the internal diameter of second retaining ring is less than the internal diameter of extension pipe and the internal diameter of second retaining ring is less than the external diameter of first retaining ring, can make the extension pipe slide and install in the drinking-water pipe to reduce the extension pipe and slide the possibility that the volume is too big and break away from the drinking-water pipe.

Optionally, a polytetrafluoroethylene pad with an annular structure is fixed to the outer peripheral wall of the first retainer ring, and the outer peripheral wall of the polytetrafluoroethylene pad is attached to the inner peripheral wall of the elongated tube.

Through adopting foretell technical scheme, through the setting of polytetrafluoroethylene pad, the polytetrafluoroethylene pad has good lubrication action, can reduce the frictional resistance between extension pipe and the drinking-water pipe, improves the smooth degree of sliding of extension pipe removal process.

Optionally, the filter is installed to the one end that the drinking-water pipe was kept away from to the extension pipe, the filtration pore that runs through the filter is seted up to the face of filter.

Through adopting foretell technical scheme, through the setting of filter, the filter can filter the mud of taking off the muddy water, reduces and takes off the mud that does not deposit totally in the bottom of the pool of reaction tank or the mud of concentrated pond bottom of the pool in the muddy water and is taken into the possibility of drinking-water pipe.

Optionally, the reaction tank and the concentration tank are both provided with stirring components for stirring electroplating wastewater.

Through adopting foretell technical scheme, through the setting of stirring subassembly, the electroplating effluent in the reaction tank or the electroplating effluent in the concentrated pond can be stirred to the stirring subassembly for electroplating effluent can deposit and condense reaction with PAC, PAM fully. Improving the mud-water separation effect of the electroplating wastewater.

Optionally, the stirring subassembly includes the (mixing) shaft and is used for ordering about (mixing) shaft pivoted driving motor, driving motor's output shaft runs through reaction tank or concentrated pond and coaxial coupling in the (mixing) shaft, the periphery wall of (mixing) shaft is fixed with the stirring rake that is used for mixxing electroplating effluent.

Through adopting foretell technical scheme, start driving motor and drive the stirring rake and rotate, can stir electroplating effluent and PAC, PAM and mix, improve the sediment and the coagulation rate of mud in the electroplating effluent.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the reaction tank, the concentration tank and the filter press, three sludge-water separation processes can be carried out on the sludge in the electroplating wastewater, so that the water content in the sludge is reduced, and the subsequent treatment operation of the sludge is facilitated;

2. the length of the inlet end of the water pumping pipe is adjustable through the arrangement of the lengthened pipe, so that the possibility that the water level of the desliming water is reduced in the water pumping process of the water pumping pipe to cause the water pumping pipe to be incapable of pumping the desliming water is reduced;

3. through the setting of stirring subassembly, can make electroplating effluent and PAC, PAM carry out abundant sediment, the reaction that condenses, improve electroplating sludge's mud-water separation efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of embodiment 1;

FIG. 2 is a partial sectional view showing the inclined surface of the bottom wall of the reaction tank in example 1;

FIG. 3 is a schematic view of the entire structure of embodiment 2;

figure 4 is a partial cross-sectional view of an elongated tube embodied in example 2.

Description of reference numerals: 1. a reaction tank; 11. a water inlet pipe; 12. a first drain pipe; 121. a first valve; 122. a first sludge pump; 2. a concentration tank; 21. a second sewage draining pipe; 211. a second valve; 212. a second sludge pump; 3. a filter press; 31. a water outlet pipe; 4. a water pumping pipe; 41. a first retainer ring; 411. a polytetrafluoroethylene pad; 5. lengthening a pipe; 51. floating blocks; 511. a corrosion-resistant layer; 52. a second retainer ring; 53. a filter plate; 531. a filtration pore; 532. a bolt; 6. a stirring assembly; 61. a stirring shaft; 62. a drive motor; 63. a stirring paddle; 7. a support; 8. and (5) hooping.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

Example 1:

the embodiment of the application discloses electroplating sludge's filter-pressing system.

Referring to fig. 1, a filter pressing system for electroplating sludge comprises a reaction tank 1, a concentration tank 2 and a filter press 3 which are arranged in sequence along a conveying direction; in the embodiment, the reaction tank 1 and the concentration tank 2 are both erected on the ground through a bracket 7; the reaction tank 1 and the concentration tank 2 are both arranged to be of a structure with an open top, so that a medicine adding channel for adding PAC and PAM is formed; in other embodiments, the reaction tank 1 and the concentration tank 2 may also be of a top-closed structure, and the dosing channel may be a pipeline penetrating through the top wall of the reaction tank 1 or the top wall of the concentration tank 2, or a dosing hopper penetrating through the top wall of the reaction tank 1 or the top wall of the concentration tank 2.

Referring to fig. 1, a water inlet pipe 11 for introducing electroplating wastewater into the reaction tank 1 is connected to the reaction tank 1, the water inlet pipe 11 is located above the reaction tank 1, and an outlet end of the water inlet pipe 11 is bent downward and extends into the reaction tank 1; in this embodiment, the water inlet pipe 11 is fixedly connected with the top wall of the reaction tank 1 through the hoop 8.

Referring to fig. 1, a reaction tank 1 and a concentration tank 2 are both connected with a water pumping pipe 4; the water pumping pipe 4 of the reaction tank 1 and the water pumping pipe 4 of the concentration tank 2 have the same structure, and the water pumping pipe 4 of the reaction tank 1 is taken as an example for explanation, and the water pumping pipe 4 of the concentration tank 2 can be obtained in the same way.

Referring to fig. 1, a water pumping pipe 4 is located above a reaction tank 1, the water pumping pipe 4 is connected with a water pumping pump (not shown in the figure), the water pumping pump is used for pumping dehydrated water in the reaction tank 1 outwards, and an inlet end of the water pumping pipe 4 is arranged downwards and extends into the reaction tank 1; in this embodiment, the water pumping pipe 4 is fixedly connected with the top wall of the reaction tank 1 through the hoop 8.

Referring to fig. 1, a first blowdown pipe 12 is connected between a reaction tank 1 and a concentration tank 2, an inlet end of the first blowdown pipe 12 is connected to the bottom wall of the reaction tank 1 and communicated with the inside of the reaction tank 1, an outlet end of the first blowdown pipe 12 is connected to the concentration tank 2, and an outlet end opening of the first blowdown pipe 12 is arranged downwards and extends into the concentration tank 2; the first drain pipe 12 is provided with a first valve 121 for opening and closing the first drain pipe 12, and the first valve 121 is positioned at the bottom of the reaction tank 1; the first sewage discharge pipe 12 is further provided with a first sewage pump 122, the first sewage pump 122 is positioned on one side of the first valve 121 far away from the reaction tank 1, and the first sewage pump 122 is used for conveying the sewage in the reaction tank 1 to the concentration tank 2.

When carrying out mud-water separation to electroplating sludge, let in reaction tank 1 through inlet tube 11 with electroplating effluent, then in adding PAC and PAM reaction tank 1, PAC, PAM can react with electroplating effluent, make electroplating effluent's mud can deposit and condense, the mud that the weight is heavier sinks in reaction tank 1's bottom of the pool, then will be located the desliming water on mud upper strata through drinking-water pipe 4 and take out and separate, start first sludge pump 122 and carry mud to concentrated pond 2, thereby reduce the water content in the mud.

Referring to fig. 1, a second sewage draining pipe 21 is connected between the concentration tank 2 and the filter press 3, the inlet end of the second sewage draining pipe 21 is connected to the bottom wall of the concentration tank 2 and communicated with the interior of the concentration tank 2, and the outlet end of the second sewage draining pipe 21 is connected to the filter press 3; the second sewage draining pipe 21 is provided with a second valve 211 for opening and closing the second sewage draining pipe 21, and the second valve 211 is positioned at the bottom of the concentration tank 2; the second sewage draining pipe 21 is further provided with a second sludge pump 212, the second sludge pump 212 is positioned on one side of the second valve 211 far away from the thickening tank 2, and the second sludge pump 212 is used for conveying the sludge in the thickening tank 2 to the filter press machine 3.

After the mud of reaction tank 1 is carried to concentration tank 2, add PAM to concentration tank 2 and continue to condense the reaction to mud, then the drinking-water 4 through concentration tank 2 continues to be taken away the desliming water on mud upper strata, and the mud that deposits in 2 bottoms of ponds in concentration tank is carried to pressure filter 3 through second blow off pipe 21 to further reduce the moisture content in the mud.

Referring to fig. 1, a water outlet pipe 31 is connected to a side wall of the filter press 3 away from the second sewage draining pipe 21, and a sludge membrane (not shown) for reducing the water content in the sludge is installed inside the filter press 3; the filter press 3 is a prior art device and the other structures of the filter press 3 are not described here too much; sludge conveyed to the filter press 3 by the concentration tank 2 can be further subjected to sludge-water separation under the action of a sludge membrane, and separated water is discharged through a water outlet pipe 31; through three sludge-water separation processes, the water content of the obtained sludge is greatly reduced, so that the subsequent treatment of the sludge is facilitated.

Referring to fig. 2, the bottom walls of the reaction tank 1 and the concentration tank 2 are both arranged to be gradually inclined downwards from the periphery of the reaction tank 1 or the concentration tank 2 to the inlet end of the first sewage discharge pipe 12 or the inlet end of the second sewage discharge pipe 21; so design, the diapire that the slope set up makes the mud of sediment can collect in the entrance point of first blow off pipe 12 or the entrance point of second blow off pipe 21 to the transport of mud is convenient for.

Example 2:

Referring to fig. 3, the difference between the filter pressing system for electroplating sludge disclosed in the embodiment of the present application and the embodiment 1 is that:

the reaction tank 1 and the concentration tank 2 are both provided with stirring assemblies 6 for stirring electroplating wastewater, it should be noted that the stirring assemblies 6 of the reaction tank 1 and the concentration tank 2 have the same structure, the stirring assembly 6 of the reaction tank 1 is taken as an example for explanation, and the stirring assembly 6 of the concentration tank 2 can be obtained by the same method.

Referring to fig. 3, the stirring assembly 6 includes a stirring shaft 61, a driving motor 62 and a stirring paddle 63, wherein the stirring shaft 61 is horizontally arranged and two ends of the stirring shaft 61 are rotatably connected to two opposite side walls of the reaction tank 1; the driving motor 62 is fixed on the outer side wall of the reaction tank 1, the output shaft of the driving motor 62 penetrates through the side wall of the reaction tank 1 and is coaxially connected to the stirring shaft 61, and the stirring paddle 63 is fixedly arranged on the outer peripheral wall of the stirring shaft 61; in this embodiment, the stirring paddles 63 are arranged in a plurality of groups and equidistantly arranged along the length direction of the stirring shaft 61; so design, start driving motor 62 and drive stirring rake 63 and rotate and can stir electroplating effluent for electroplating effluent can carry out abundant reaction with PAC, PAM, improves mud-water separation's effect.

Referring to fig. 3 and 4, an elongated tube 5 is slidably mounted at the inlet end of the pumping tube 4, and the inner diameter of the elongated tube 5 is larger than the outer diameter of the pumping tube 4; a first retaining ring 41 is fixed on the outer peripheral wall of the inlet end of the pumping pipe 4, a second retaining ring 52 is fixed at one end of the lengthening pipe 5 close to the pumping pipe 4, the inner diameter of the second retaining ring 52 is smaller than that of the lengthening pipe 5, and the inner diameter of the second retaining ring 52 is smaller than the outer diameter of the first retaining ring 41; with such a design, the possibility that the extension pipe 5 slips too much and is separated from the pumping pipe 4 can be reduced by the arrangement of the first retainer ring 41 and the second retainer ring 52.

Referring to fig. 4, the outer peripheral wall of the first retainer ring 41 is bonded and fixed with the polytetrafluoroethylene pad 411 of an annular structure, the outer peripheral wall of the polytetrafluoroethylene pad 411 is abutted to the inner peripheral wall of the extension pipe 5, and the polytetrafluoroethylene pad 411 has a good self-lubricating effect, so that the friction resistance between the extension pipe 5 and the water pumping pipe 4 is favorably reduced, and the sliding smoothness between the extension pipe 5 and the water pumping pipe 4 is improved.

Referring to fig. 4, a filter plate 53 is fixedly installed at one end of the elongated tube 5 away from the water pumping tube 4, a plurality of filter holes 531 penetrating through the filter plate 53 are formed in the plate surface of the filter plate 53, and all the filter holes 531 are uniformly distributed along the plate surface of the filter plate 53; in this embodiment, the filter plate 53 is fixedly mounted on the end surface of the pumping pipe 4 by bolts 532; through the setting of filter 53, filter 53 can reduce the mud and get into the possibility of drinking-water pipe 4.

Referring to fig. 4, a floating block 51 is fixedly mounted on the outer peripheral wall of the elongated tube 5, and the sum of the weights of the floating block 51, the filter plate 53 and the elongated tube 5 is less than the buoyancy of the deslimed water, so that the floating block 51 can float on the surface of the deslimed water; when the pumping pipe 4 pumps the deslimed water, the floating block 51 can descend along with the water surface and force the lengthening pipe 5 to move towards the bottom of the reaction tank 1, so that the possibility that the pumping pipe 4 cannot pump the deslimed water due to the descending of the water level of the deslimed water in the reaction tank 1 can be reduced.

Referring to fig. 4, the bottom surface of the floating block 51 is higher than the end surface of the elongated tube 5 close to the reaction tank 1; so design, when the floating block 51 floated on the surface of water of desliming water, can make the end of intaking of extension pipe 5 insert throughout in the desliming water to make drinking-water pipe 4 can continuously pump the desliming water, further reduce the water level decline in reaction tank 1 and can't pump the possibility of desliming water.

Referring to fig. 4, the outer wall of the floating block 51 is coated with a corrosion-resistant layer 511, and in this embodiment, the corrosion-resistant layer 511 is a mixed layer of epoxy resin and phenolic resin; the epoxy resin and the phenolic resin can resist acid, alkali and dissolution; the epoxy resin and phenolic resin mixture is coated on the outer wall of the floating block 51, so that the possibility that the floating block 51 is corroded by external chemical substances can be reduced, and the service life of the floating block 51 is prolonged.

The implementation principle of the filter pressing system for electroplating sludge in the embodiment of the application is as follows: through the arrangement of the stirring assembly 6, the stirring paddle 63 can be started to stir the electroplating wastewater, so that precipitation and condensation reactions can be fully performed between the electroplating wastewater and PAC and PAM, and the sludge-water separation effect of the electroplating sludge is improved; through the setting of extension pipe 5 for the height-adjustable of the entrance point of drinking-water pipe 4, take out the in-process that takes off muddy water from reaction tank 1 or concentrated pond 2 when drinking-water pipe 4, the floater 51 on extension pipe 5 can make extension pipe 5 insert the possibility in the water face of muddy water and avoid extension pipe 5 to insert mud all the time, thereby make drinking-water pipe 4 can continuously keep taking out the muddy water, reduce the muddy water level decline in pond reaction tank 1 or the concentrated pond 2 and make drinking-water pipe 4 can't take out the possibility of muddy water.

The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a filter-pressing system of electroplating mud which characterized in that: the device comprises a reaction tank (1), a concentration tank (2) and a filter press (3) which are sequentially arranged along the conveying direction, wherein the reaction tank (1) and the concentration tank (2) and the filter press (3) are communicated with each other through sewage discharge pipelines; the reaction tank (1) is connected with a water inlet pipe (11) for introducing electroplating wastewater, and the reaction tank (1) and the concentration tank (2) are both provided with a medicine adding channel for adding PAC and PAM; the reaction tank (1) and the concentration tank (2) are respectively connected with a water pumping pipe (4) used for pumping water away from the upper layer, and each water pumping pipe (4) is provided with a water pumping pump.

2. A filter-pressing system for electroplating sludge according to claim 1, wherein: openings of water inlet ends of all the water pumping pipes (4) are vertically downward and extend into the reaction tank (1) or the concentration tank (2), and the peripheral wall of the inlet end of each water pumping pipe (4) is connected with an extension pipe (5) in a sliding manner; the outer peripheral wall of the lengthened pipe (5) is fixed with a floating block (51), and the sum of the gravity of the floating block (51) and the lengthened pipe (5) is less than the buoyancy of the electroplating wastewater.

3. A pressure filtration system for electroplating sludge according to claim 2, wherein: the bottom surface of the floating block (51) is higher than the end surface of the inlet end of the lengthening pipe (5).

4. A pressure filtration system for electroplating sludge according to claim 2, wherein: the outer wall of the floating block (51) is coated with a corrosion-resistant layer (511).

5. A filter-pressing system for electroplating sludge according to claim 2, wherein: the drinking water pipe (4) are intake the periphery wall of end and are fixed with first retaining ring (41), the one end that extension pipe (5) are close to drinking water pipe (4) is fixed with second retaining ring (52), the internal diameter of second retaining ring (52) is less than the internal diameter of extension pipe (5) and the internal diameter of second retaining ring (52) is less than the external diameter of first retaining ring (41).

6. A filter-pressing system for electroplating sludge according to claim 5, wherein: the polytetrafluoroethylene pad (411) with an annular structure is fixed to the outer peripheral wall of the first retainer ring (41), and the outer peripheral wall of the polytetrafluoroethylene pad (411) is attached to the inner peripheral wall of the lengthening pipe (5).

7. A filter-pressing system for electroplating sludge according to claim 2, wherein: the one end that drinking-water pipe (4) were kept away from in extension pipe (5) is installed filter (53), filtration hole (531) that run through filter plate (53) are seted up to the face of filter (53).

8. A pressure filtration system for electroplating sludge according to claim 1, wherein: the reaction tank (1) and the concentration tank (2) are both provided with stirring components (6) for stirring electroplating wastewater.

9. A filter-pressing system for electroplating sludge according to claim 8, wherein: stirring subassembly (6) are including (mixing) shaft (61) and be used for driving about (mixing) shaft (61) pivoted driving motor (62), the output shaft of driving motor (62) runs through reaction tank (1) or concentrated pond (2) and coaxial coupling in (mixing) shaft (61), the periphery wall of (mixing) shaft (61) is fixed with stirring rake (63) that are used for stirring electroplating effluent.