Sewage treatment equipment for wastewater containing gold and silver

Abstract

The invention relates to the technical field of sewage treatment, in particular to sewage treatment equipment for wastewater containing gold and silver, and solves the problems that gold and silver cannot be fully recycled when the content of the gold and the silver in the wastewater is high or too low due to the fact that a single recycling mode is mostly adopted for recycling the gold and the silver in the wastewater in the prior art. The invention discloses a wastewater treatment device which solves the problems of high equipment operation pressure and low recovery efficiency due to the fact that wastewater is treated in a single recovery mode in the prior art, and comprises a sewage pretreatment mechanism, a secondary separation mechanism, an evaporator and a purifier, and the secondary separation mechanism is mounted on one side of the sewage pretreatment mechanism; the sewage pretreatment mechanism is in through connection with the secondary separation mechanism through a first sewage conveying pipe, and an evaporator is mounted on the inner side of the secondary separation mechanism. By carrying out purification and secondary recovery treatment on the wastewater containing gold and silver, the recovery operation of gold and silver with different concentrations can be met, the gold and silver can be fully removed, the recovery pressure is effectively reduced, and the sewage purification effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to sewage treatment equipment for wastewater containing gold and silver. Background Art

[0002] Wastewater contains precious metals such as gold and silver, which have high economic value. By recycling these metals, we can avoid the waste of resources and realize the reuse of resources. Reducing pollution is also an important role of wastewater recycling. If gold-containing wastewater is directly discharged into the environment, it will cause serious pollution to the ecological environment. Through recycling and treatment, these harmful substances can be reduced. Reducing production costs is also an important economic effect of wastewater recycling. By recycling metal elements in wastewater, enterprises can reduce the procurement cost of raw materials and improve production efficiency.

[0003] The existing gold and silver recovery in wastewater mostly adopts a single recovery method for treatment. When the gold and silver content in the wastewater is high or too low, it is impossible to ensure the full recovery of gold and silver. In addition, the single recovery method is used to treat the wastewater, the equipment operation pressure is high and the recovery efficiency is low. Therefore, it does not meet the existing needs. In this regard, we propose a sewage treatment equipment for wastewater containing gold and silver. Summary of the invention

[0004] The object of the present invention is to provide a sewage treatment equipment for wastewater containing gold and silver, so as to solve the problems proposed in the above background technology that the existing gold and silver in wastewater are mostly recovered by a single recovery method, and when the gold and silver content in the wastewater is high or too low, the gold and silver cannot be fully recovered, and the wastewater is treated by a single recovery method, the equipment operating pressure is high, and the recovery efficiency is low.

[0005] To achieve the above object, the present invention provides the following technical solutions: A sewage treatment device for wastewater containing gold and silver comprises a sewage pretreatment mechanism, a secondary separation mechanism, an evaporator and a purifier, wherein the secondary separation mechanism is installed on one side of the sewage pretreatment mechanism, the sewage pretreatment mechanism and the secondary separation mechanism are connected through a first sewage conveying pipe, an evaporator is installed on the inner side of the secondary separation mechanism, a purifier is installed on one side of the secondary separation mechanism, the purifier is connected through a reflux pipe with the sewage pretreatment mechanism, the secondary separation mechanism and the purifier are connected through a second sewage conveying pipe, the secondary separation mechanism comprises an automatic replacement mechanism, an ion exchange mechanism and an electrolysis mechanism, the ion exchange mechanism and the electrolysis mechanism are installed on the inner side of the automatic replacement mechanism, and the evaporator is located between the ion exchange mechanism and the electrolysis mechanism.

[0006] Preferably, the input end of the sewage pretreatment mechanism is through-connected with a sewage input pipeline, a cleaning spray rack is installed at the upper end of the sewage pretreatment mechanism, the sewage pretreatment mechanism includes a pretreatment installation box, a sedimentation tank is fixedly installed on the inner side of the pretreatment installation box, an impurity removal box is fixedly installed on one side of the sedimentation tank, the sedimentation tank and the impurity removal box are through-connected through a first connecting pipe, a plurality of linearly arranged filter units are fixedly installed on the inner side of the impurity removal box, an adsorption box is fixedly installed on one side of the impurity removal box, and the impurity removal box and the adsorption box are through-connected through a second connecting pipe.

[0007] Preferably, a first booster pump is fixedly installed in the middle of the first sewage conveying pipe, a second booster pump is fixedly installed in the middle of the second sewage conveying pipe, a third booster pump is fixedly installed on the outside of the return pipe, the output end of the purifier is connected with a purified water output pipe, and a reverse osmosis membrane is provided on the inside of the purifier.

[0008] Preferably, the automatic replacement mechanism includes a supporting base, a mounting frame is fixedly installed on the upper end surface of the supporting base, a control panel is fixedly installed on the upper end of the mounting frame, two hydraulic cylinders are fixedly installed on one side of the control panel, the two hydraulic cylinders are symmetrically installed relative to the center of the supporting base, a transmission seat is fixedly installed on the output ends of the two hydraulic cylinders, a second transmission motor is fixedly installed on one side of the transmission seat, a driving wheel is fixedly installed on the output end of the second transmission motor, a swing arm is rotatably connected to the outer side of the transmission seat, a connecting plate is fixedly installed on the rear end surface of the transmission seat, a first transmission motor is fixedly installed on the rear end of the connecting plate, a sliding seat is slidably connected to the inner side of the connecting plate, and a transmission screw is installed on the inner side of the upper end of the sliding seat.

[0009] Preferably, the ion exchange mechanism includes an ion exchange box, the bottom end of which is fixedly connected to a support base, both ends of the ion exchange box are fixedly provided with a primary input pipe, the inner side of the upper end of the ion exchange box is slidably connected with two resin mounting plates, the bottom end of the ion exchange box is fixedly provided with a first liquid level gauge, and a connecting pipe is installed on one side of the first liquid level gauge.

[0010] Preferably, the electrolysis mechanism includes an electrolysis box, the bottom end of which is fixedly connected to a support base, an output tube is fixedly installed on the front end surface of the electrolysis box, and power sockets are fixedly installed at both ends of the electrolysis box, one side of one of the power sockets is slidably connected to an electrolysis anode seat, and one side of the other power socket is slidably connected to an electrolysis cathode seat, and the upper end of the electrolysis box is connected to the evaporator via a secondary input pipe.

[0011] Preferably, both ends of the first sewage conveying pipe and the ion exchange box are connected through a primary input pipe, the bottom end of the primary input pipe is connected to the evaporator through a connecting pipe, the upper end of the first liquid level gauge passes through the supporting base and is plugged into the inner side of the ion exchange box, two partitions are fixedly provided on the inner side of the ion exchange box, the bottom end of the resin mounting plate is plugged into the middle of the partition, and the upper end of the connecting pipe passes through the supporting base and the ion exchange box and is plugged between the two resin mounting plates.

[0012] Preferably, the ion exchange box is connected through the middle of the electrolytic box, solenoid valves are provided between the ion exchange box and the electrolytic box and inside the secondary input pipe, the electrolysis anode seat and the electrolysis cathode seat are electrically connected to the power receiving seat, and the liquid level inside the electrolytic box is lower than the height of the connection part between the power receiving seat and the electrolysis anode seat and the electrolysis cathode seat.

[0013] Preferably, a slide groove is provided on the lower end surface of the connecting plate, the upper end of the sliding seat is inserted into the inner side of the slide groove, the output end of the first transmission motor is connected to the transmission screw through a coupling, the transmission screw is connected to the sliding seat through a threaded connection, and the swing arm is detachably connected to the upper end of the electrolytic cathode seat.

[0014] Preferably, the driving wheel is rollingly connected to the swing arm, one end of the swing arm away from the electrolysis cathode seat is sleeved on the outside of the transmission seat, the swing arm is rotationally connected to the transmission seat through a bearing, and the swing arm swings back and forth relative to the center of the transmission seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention allows sewage to stand and precipitate in a sedimentation tank, and can perform multi-stage filtration on the sewage through a filtering unit, and then transports it to an adsorption box through a second connecting pipe for further removal of impurities and transports it to the inner side of a secondary separation mechanism through a first sewage transport pipe. The secondary separation mechanism can perform dual removal operations of ion exchange and electrolysis on wastewater containing gold and silver, which can effectively improve the efficiency of gold and silver recovery. The reverse osmosis membrane provided on the inner side of the purifier can purify the sewage and output it through a clean water output pipe, thereby achieving effective purification of the sewage; 2. The present invention can exchange and adsorb gold and silver ions through the resin in the resin mounting plate, and can evaporate and concentrate the sewage through the evaporator, thereby increasing the concentration of gold and silver ions, reducing the electrolysis cost, and improving the electrolysis efficiency. Then, the gold and silver ions are transported to the inner side of the electrolysis box through the secondary input pipe, and the gold and silver ions are electrolyzed and deposited on the surface of the electrolysis cathode seat through the electrolysis anode seat and the electrolysis cathode seat. The hydraulic cylinder drives the swing arm, the connecting plate and the sliding seat to move upward synchronously through the transmission seat, so that the electrolysis cathode seat and the two resin mounting plates can be pulled out, and the second transmission motor drives the swing arm to rotate on the outside of the transmission seat through the driving wheel, so that the position of the electrolysis cathode seat can be adjusted, which is convenient for replacing the electrolysis cathode seat and the two resin mounting plates and recovering gold and silver. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a flowchart of the overall process of the present invention; Figure 2 A system diagram of the present invention as a whole; Figure 3 It is a structural schematic diagram of the sewage pretreatment mechanism of the present invention; Figure 4 It is a structural schematic diagram of the secondary separation mechanism of the present invention; Figure 5 It is a top view of the secondary separation mechanism of the present invention; Figure 6 It is a bottom view of the secondary separation mechanism of the present invention; Figure 7 It is a side view of the secondary separation mechanism of the present invention; Figure 8 It is a schematic diagram of the installation structure of the swing support arm of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the electrolytic box of the present invention.

[0017] In the figure: 1. sewage pretreatment mechanism; 101. pretreatment installation box; 102. sedimentation tank; 103. first connecting pipe; 104. impurity removal box; 105. filter unit; 106. second connecting pipe; 107. adsorption box; 2. secondary separation mechanism; 21. automatic replacement mechanism; 2101. support base; 2102. installation frame; 2103. control panel; 2104. hydraulic cylinder; 2105. connecting plate; 2106. first transmission motor; 2107. transmission screw; 2108. sliding seat; 2109. transmission seat; 2110. second transmission motor; 2111. driving wheel; 2112. swing arm; 22 , ion exchange mechanism; 2201, ion exchange box; 2202, primary input pipe; 2203, resin mounting plate; 2204, first liquid level gauge; 2205, connecting pipe; 23, electrolysis mechanism; 2301, electrolysis box; 2302, output pipe; 2303, connection socket; 2304, electrolysis anode socket; 2305, electrolysis cathode socket; 2306, secondary input pipe; 3, evaporator; 4, purifier; 5, sewage input pipeline; 6, cleaning spray rack; 7, first sewage delivery pipe; 8, first booster pump; 9, second sewage delivery pipe; 10, clean water output pipe; 11, reflux pipe; 12, second booster pump; 13, third booster pump. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] The hydraulic cylinder 2104 (model HOB80X250-100), the first transmission motor 2106 (model KOM7080) and the second transmission motor 2110 (model GV50-3.7KW-60-S) mentioned in the present invention can all be purchased from the market or obtained through private customization.

[0020] See also Figures 1 to 3 , an embodiment provided by the present invention: a sewage treatment device for wastewater containing gold and silver, comprising a sewage pretreatment mechanism 1, a secondary separation mechanism 2, an evaporator 3 and a purifier 4, the secondary separation mechanism 2 is installed on one side of the sewage pretreatment mechanism 1, the input end of the sewage pretreatment mechanism 1 is connected with a sewage input pipeline 5, the upper end of the sewage pretreatment mechanism 1 is installed with a cleaning spray rack 6, the sewage pretreatment mechanism 1 is connected with the secondary separation mechanism 2 through a first sewage conveying pipe 7, the evaporator 3 is installed inside the secondary separation mechanism 2, and the evaporator 3 can evaporate and concentrate the sewage to increase the concentration of gold and silver ions, reduce the electrolysis cost, and improve the electrolysis efficiency; A purifier 4 is installed on one side of the secondary separation mechanism 2, and a clean water output pipe 10 is connected to the output end of the purifier 4. A reverse osmosis membrane is arranged on the inner side of the purifier 4. The purifier 4 is connected to the sewage pretreatment mechanism 1 through a return pipe 11. A third booster pump 13 is fixedly installed on the outer side of the return pipe 11. The secondary separation mechanism 2 is connected to the purifier 4 through a second sewage delivery pipe 9. A second booster pump 12 is fixedly installed in the middle of the second sewage delivery pipe 9. A first booster pump 8 is fixedly installed in the middle of the first sewage delivery pipe 7. The sewage can be purified by the reverse osmosis membrane and output through the clean water output pipe, thereby realizing effective purification of the sewage. The sewage pretreatment mechanism 1 includes a pretreatment installation box 101, a sedimentation tank 102 is fixedly installed on the inner side of the pretreatment installation box 101, an impurity removal box 104 is fixedly installed on one side of the sedimentation tank 102, the sedimentation tank 102 and the impurity removal box 104 are connected through a first connecting pipe 103, a plurality of linearly arranged filter units 105 are fixedly installed on the inner side of the impurity removal box 104, an adsorption box 107 is fixedly installed on one side of the impurity removal box 104, the impurity removal box 104 and the adsorption box 107 are connected through a second connecting pipe 106, the sewage can be multi-stage filtered through the filter unit 105, and then the impurities are further removed through the adsorption box 107.

[0021] See also Figure 1 and Figure 4 The secondary separation mechanism 2 includes an automatic replacement mechanism 21, an ion exchange mechanism 22 and an electrolysis mechanism 23. The ion exchange mechanism 22 and the electrolysis mechanism 23 are installed on the inner side of the automatic replacement mechanism 21. The evaporator 3 is located between the ion exchange mechanism 22 and the electrolysis mechanism 23. The gold and silver ions are fully recovered through the ion exchange mechanism 22 and the electrolysis mechanism 23.

[0022] See also Figures 4 to 8 The automatic replacement mechanism 21 includes a support base 2101, a mounting frame 2102 is fixedly installed on the upper end surface of the support base 2101, a control panel 2103 is fixedly installed on the upper end of the mounting frame 2102, two hydraulic cylinders 2104 are fixedly installed on one side of the control panel 2103, the two hydraulic cylinders 2104 are symmetrically installed relative to the center of the support base 2101, and a transmission seat 2109 is fixedly installed at the output ends of the two hydraulic cylinders 2104, so that the hydraulic cylinders 2104 synchronously drive the swing arm 2112, the connecting plate 2105 and the sliding seat 2108 to move upward synchronously through the transmission seat 2109, so that the electrolytic cathode seat 2305 and the two resin mounting plates 2203 can be pulled out; A second transmission motor 2110 is fixedly installed on one side of the transmission seat 2109, and a driving wheel 2111 is fixedly installed on the output end of the second transmission motor 2110. A swing arm 2112 is rotatably connected to the outer side of the transmission seat 2109, and the driving wheel 2111 is rollingly connected to the swing arm 2112. One end of the swing arm 2112 away from the electrolytic cathode seat 2305 is sleeved on the outer side of the transmission seat 2109, and the swing arm 2112 is rotatably connected to the transmission seat 2109 through a bearing. The swing arm 2112 swings back and forth relative to the center of the transmission seat 2109, so that the second transmission motor 2110 drives the swing arm 2112 to rotate on the outer side of the transmission seat 2109 through the driving wheel 2111, thereby being able to adjust the position of the electrolytic cathode seat 2305, which is convenient for replacing the electrolytic cathode seat 2305 and the two resin mounting plates 2203; A connecting plate 2105 is fixedly installed on the rear end face of the transmission seat 2109, and a first transmission motor 2106 is fixedly installed on the rear end of the connecting plate 2105. A sliding seat 2108 is slidably connected to the inner side of the connecting plate 2105, and a transmission screw 2107 is installed on the inner side of the upper end of the sliding seat 2108. A slide groove is provided on the lower end face of the connecting plate 2105, and the upper end of the sliding seat 2108 is plugged into the inner side of the slide groove. The output end of the first transmission motor 2106 is connected to the transmission screw 2107 through a coupling, and the transmission screw 2107 is connected to the sliding seat 2108 through a threaded connection, so that the first transmission motor 2106 drives the sliding seat 2108 to slide through the transmission screw 2107, thereby being able to further adjust the position of the electrolytic cathode seat 2305, so as to facilitate the recovery of gold and silver on the electrolytic cathode seat 2305.

[0023] See also Figures 4 to 7 The ion exchange mechanism 22 includes an ion exchange box 2201, the bottom end of the ion exchange box 2201 is fixedly connected to the support base 2101, both ends of the ion exchange box 2201 are fixedly provided with a primary input pipe 2202, the first sewage delivery pipe 7 and both ends of the ion exchange box 2201 are connected through the primary input pipe 2202, the inner side of the upper end of the ion exchange box 2201 is slidably connected with two resin mounting plates 2203, the inner side of the ion exchange box 2201 is fixedly provided with two partitions, the bottom end of the resin mounting plate 2203 is plugged into the middle of the partition, and the resin mounting plate 2203 is positioned and installed through the two partitions, so as to improve the adsorption rate of gold and silver ions in the ion exchange box 2201; A first liquid level gauge 2204 is fixedly installed at the bottom end of the ion exchange box 2201, and the upper end of the first liquid level gauge 2204 passes through the support base 2101 and is plugged into the inner side of the ion exchange box 2201. A connecting pipe 2205 is installed on one side of the first liquid level gauge 2204. The bottom end of the primary input pipe 2202 is connected to the evaporator 3 through the connecting pipe 2205. The upper end of the connecting pipe 2205 passes through the support base 2101 and the ion exchange box 2201 and is plugged between the two resin mounting plates 2203. The gold and silver ions can be adsorbed through the ion exchange mechanism 22, thereby effectively reducing the concentration of gold and silver ions in the wastewater.

[0024] See also Figures 4 to 9 The electrolysis mechanism 23 includes an electrolysis box 2301, the bottom end of the electrolysis box 2301 is fixedly connected to the support base 2101, the front end of the electrolysis box 2301 is fixedly installed with an output tube 2302, and both ends of the electrolysis box 2301 are fixedly installed with an electric connection seat 2303, one side of the electric connection seat 2303 is slidably connected to an electrolysis anode seat 2304, and the other side of the electric connection seat 2303 is slidably connected to an electrolysis cathode seat 2305, and the swing arm 2112 is connected to the electrolysis cathode seat 2305. The upper end of the pole seat 2305 is detachably connected, and the liquid level inside the electrolytic box 2301 is lower than the height of the connection part between the electric connection seat 2303 and the electrolytic anode seat 2304 and the electrolytic cathode seat 2305. The electrolytic anode seat 2304 and the electrolytic cathode seat 2305 are both electrically connected to the electric connection seat 2303. The electrolytic anode seat 2304 and the electrolytic cathode seat 2305 can electrolyze the gold and silver ions and realize the deposition of the gold and silver ions on the surface of the electrolytic cathode seat 2305. The upper end of the electrolytic box 2301 is connected to the evaporator 3 through the secondary input pipe 2306, and the ion exchange box 2201 is connected to the middle part of the electrolytic box 2301. Solenoid valves are provided between the ion exchange box 2201 and the electrolytic box 2301 and inside the secondary input pipe 2306. The two solenoid valves can control the output of wastewater in the ion exchange box 2201 to the evaporator 3 and the electrolytic box 2301.

[0025] In summary, when treating the sewage containing gold and silver wastewater, the sewage is input into the sewage pretreatment mechanism 1 through the sewage input pipeline 5, specifically, the sewage is allowed to stand and precipitate through the sedimentation tank 102 and is transported to the multiple filter units 105 inside the impurity removal box 104 through the first connecting pipe 103, and the multiple filter units 105 are arranged linearly, and then the sewage can be multi-stage filtered through the filter units 105, and then transported to the adsorption box 107 through the second connecting pipe 106 for further removal of impurities and transported to the inside of the secondary separation mechanism 2 through the first sewage transport pipe 7; The secondary separation mechanism 2 is composed of an automatic replacement mechanism 21, an ion exchange mechanism 22 and an electrolysis mechanism 23, and the evaporator 3 is located between the ion exchange mechanism 22 and the electrolysis mechanism 23. The first sewage delivery pipe 7 delivers the pretreated sewage to the inner side of both ends of the ion exchange box 2201 through two primary input pipes 2202. When the power is turned on, the resin in the resin mounting plate 2203 can exchange and adsorb the gold and silver ions, and then adjust the sewage output direction according to the gold and silver ion concentration of the sewage in the ion exchange box 2201. Solenoid valves are provided between the ion exchange box 2201 and the electrolysis box 2301 and inside the secondary input pipe 2306. When the gold and silver ion concentration of the sewage in the ion exchange box 2201 meets the electrolysis requirement, the ion exchange box 2201 and the electrolysis box 2301 are connected through the solenoid valve, so that the sewage can be delivered to the inner side of the electrolysis box 2301. When the concentration of gold and silver ions is too low, the sewage is transported to the inner side of the evaporator 3 through the connecting pipe 2205, so that the sewage can be evaporated and concentrated by the evaporator 3 to increase the concentration of gold and silver ions, and then transported to the inner side of the electrolytic box 2301 through the secondary input pipe 2306. The bottom ends of the electrolytic anode seat 2304 and the electrolytic cathode seat 2305 are both plugged into the inner side of the electrolytic box 2301 and electrically connected to the two connecting seats 2303, so that the gold and silver ions can be electrolyzed by the electrolytic anode seat 2304 and the electrolytic cathode seat 2305 and deposited on the surface of the electrolytic cathode seat 2305.

[0026] After the electrolysis is completed, the sewage is transported to the inner side of the purifier 4 through the output pipe 2302 and the second sewage transport pipe 9, and then the sewage is purified by the reverse osmosis membrane provided inside the purifier 4 and output through the purified water output pipe 10, thereby achieving effective purification of the sewage and fully recovering the gold and silver ions through the ion exchange mechanism 22 and the electrolysis mechanism 23; After the gold and silver ions are recovered, the hydraulic cylinder 2104 is started, so that the hydraulic cylinder 2104, under the support of the mounting frame 2102, synchronously drives the swing arm 2112, the connecting plate 2105 and the sliding seat 2108 to move upward synchronously through the transmission seat 2109, so that the electrolytic cathode seat 2305 and the two resin mounting plates 2203 can be respectively drawn out from the inner side of the electrolytic box 2301 and the ion exchange box 2201; Then, the second transmission motor 2110 is started, so that the second transmission motor 2110 drives the swing arm 2112 to rotate on the outside of the transmission base 2109 through the driving wheel 2111 under the support of the transmission base 2109, so that the position of the electrolytic cathode base 2305 can be adjusted, which is convenient for replacing the electrolytic cathode base 2305 and the two resin mounting plates 2203 and recovering gold and silver.

[0027] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A sewage treatment device for wastewater containing gold and silver, comprising a sewage pretreatment mechanism (1), a secondary separation mechanism (2), an evaporator (3) and a purifier (4), characterized in that: A secondary separation mechanism (2) is installed on one side of the sewage pretreatment mechanism (1), the sewage pretreatment mechanism (1) and the secondary separation mechanism (2) are connected through a first sewage conveying pipe (7), an evaporator (3) is installed on the inner side of the secondary separation mechanism (2), a purifier (4) is installed on one side of the secondary separation mechanism (2), the purifier (4) and the sewage pretreatment mechanism (1) are connected through a return pipe (11), the secondary separation mechanism (2) and the purifier (4) are connected through a second sewage conveying pipe (9), the secondary separation mechanism (2) comprises an automatic replacement mechanism (21), an ion exchange mechanism (22) and an electrolysis mechanism (23), the ion exchange mechanism (22) and the electrolysis mechanism (23) are installed on the inner side of the automatic replacement mechanism (21), and the evaporator (3) is located between the ion exchange mechanism (22) and the electrolysis mechanism (23).

2. The sewage treatment equipment for gold and silver-containing wastewater according to claim 1, characterized in that: The input end of the sewage pretreatment mechanism (1) is connected to a sewage input pipeline (5), and the upper end of the sewage pretreatment mechanism (1) is installed with a cleaning spray rack (6). The sewage pretreatment mechanism (1) comprises a pretreatment installation box (101), a sedimentation tank (102) is fixedly installed on the inner side of the pretreatment installation box (101), an impurity removal box (104) is fixedly installed on one side of the sedimentation tank (102), the sedimentation tank (102) and the impurity removal box (104) are connected through a first connecting pipe (103), a plurality of linearly arranged filter units (105) are fixedly installed on the inner side of the impurity removal box (104), an adsorption box (107) is fixedly installed on one side of the impurity removal box (104), and the impurity removal box (104) and the adsorption box (107) are connected through a second connecting pipe (106).

3. The sewage treatment equipment for gold and silver-containing wastewater according to claim 2, characterized in that: A first booster pump (8) is fixedly installed in the middle of the first sewage conveying pipe (7), a second booster pump (12) is fixedly installed in the middle of the second sewage conveying pipe (9), a third booster pump (13) is fixedly installed on the outside of the return pipe (11), an output end of the purifier (4) is connected to a purified water output pipe (10), and a reverse osmosis membrane is provided on the inside of the purifier (4).

4. The sewage treatment equipment for gold and silver-containing wastewater according to claim 3 is characterized in that: The automatic replacement mechanism (21) comprises a support base (2101), a mounting frame (2102) being fixedly mounted on the upper end surface of the support base (2101), a control panel (2103) being fixedly mounted on the upper end of the mounting frame (2102), two hydraulic cylinders (2104) being fixedly mounted on one side of the control panel (2103), the two hydraulic cylinders (2104) being symmetrically mounted relative to the center of the support base (2101), a transmission seat (2109) being fixedly mounted on the output ends of the two hydraulic cylinders (2104), and the transmission seat (2109) A second transmission motor (2110) is fixedly mounted on one side, a driving wheel (2111) is fixedly mounted on the output end of the second transmission motor (2110), a swing arm (2112) is rotatably connected to the outer side of the transmission seat (2109), a connecting plate (2105) is fixedly mounted on the rear end surface of the transmission seat (2109), a first transmission motor (2106) is fixedly mounted on the rear end of the connecting plate (2105), a sliding seat (2108) is slidably connected to the inner side of the connecting plate (2105), and a transmission screw (2107) is mounted on the inner side of the upper end of the sliding seat (2108).

5. The sewage treatment equipment for gold and silver-containing wastewater according to claim 4, characterized in that: The ion exchange mechanism (22) comprises an ion exchange box (2201), the bottom end of the ion exchange box (2201) being fixedly connected to a support base (2101), both ends of the ion exchange box (2201) being fixedly provided with a primary input pipe (2202), the inner side of the upper end of the ion exchange box (2201) being slidably connected with two resin mounting plates (2203), the bottom end of the ion exchange box (2201) being fixedly provided with a first liquid level gauge (2204), and a connecting pipe (2205) being installed on one side of the first liquid level gauge (2204).

6. The sewage treatment equipment for gold and silver-containing wastewater according to claim 5, characterized in that: The electrolysis mechanism (23) comprises an electrolysis box (2301), the bottom end of the electrolysis box (2301) is fixedly connected to the support base (2101), the front end surface of the electrolysis box (2301) is fixedly mounted with an output tube (2302), both ends of the electrolysis box (2301) are fixedly mounted with an electrolysis anode seat (2304), one side of one of the electrolysis seats (2303) is slidably connected to an electrolysis cathode seat (2305), and the upper end of the electrolysis box (2301) is connected to the evaporator (3) via a secondary input tube (2306).

7. The sewage treatment equipment for gold and silver-containing wastewater according to claim 6, characterized in that: Both ends of the first sewage conveying pipe (7) and the ion exchange box (2201) are connected through a primary input pipe (2202); the bottom end of the primary input pipe (2202) is connected through the evaporator (3) through a connecting pipe (2205); the upper end of the first liquid level gauge (2204) passes through the support base (2101) and is plugged into the inner side of the ion exchange box (2201); two partitions are fixedly provided on the inner side of the ion exchange box (2201); the bottom end of the resin mounting plate (2203) is plugged into the middle of the partition; the upper end of the connecting pipe (2205) passes through the support base (2101) and the ion exchange box (2201) and is plugged into between the two resin mounting plates (2203).

8. The sewage treatment equipment for gold and silver-containing wastewater according to claim 7, characterized in that: The ion exchange box (2201) is connected to the middle of the electrolytic box (2301), and electromagnetic valves are provided between the ion exchange box (2201) and the electrolytic box (2301) and inside the secondary input pipe (2306). The electrolytic anode seat (2304) and the electrolytic cathode seat (2305) are both electrically connected to the electric connection seat (2303), and the liquid level inside the electrolytic box (2301) is lower than the height of the connection portion between the electric connection seat (2303) and the electrolytic anode seat (2304) and the electrolytic cathode seat (2305).

9. The sewage treatment equipment for gold and silver-containing wastewater according to claim 8, characterized in that: The lower end surface of the connecting plate (2105) is provided with a slide groove, the upper end of the sliding seat (2108) is plugged into the inner side of the slide groove, the output end of the first transmission motor (2106) is connected to the transmission screw (2107) via a coupling, the transmission screw (2107) is connected to the sliding seat (2108) via a threaded connection, and the swing arm (2112) is detachably connected to the upper end of the electrolytic cathode seat (2305).

10. The sewage treatment equipment for gold and silver-containing wastewater according to claim 9, characterized in that: The driving wheel (2111) is rollingly connected to the swing arm (2112); one end of the swing arm (2112) away from the electrolysis cathode seat (2305) is sleeved on the outer side of the transmission seat (2109); the swing arm (2112) is rotationally connected to the transmission seat (2109) via a bearing; and the swing arm (2112) swings back and forth relative to the center of the transmission seat (2109).

Images