TW201825404A - Auto-activated ion-exchange resin column system for precious metal - Google Patents

Abstract

Disclosed is an auto-activated ion- exchange resin column system for precious metal including a holding tank for liquid wastes of precious metal, a washing pump, a discharge loop, and a plurality of resin columns. Through a washing pipe, the washing pump is connected to a washing loop of the resin columns which is connected to each top of the resin columns, and each bottom of which is connected to a circulation loop via a pipe. Wherein, the circulation loop communicates with the washing loop of the resin columns. The invention further comprises a resin activator storage barrels which communicates through a pipe with a backwashing pump that communicates through a backwashing pipe with the circulation loop. The washing and backwashing pipes are respectively connected to two of interfaces of an electric three-way valve of washing and backwashing, and the other interface of which is connected to the discharge loop. Wherein, the circulation loop also communicated with the backwashing pipe. All in all, the invention improves the efficiency of exchanging resins and absorbing precious metal for higher volume and lower cost.

Description

Precious metal automatic activation ion exchange resin tower system

The invention relates to the field of precious metal recovery equipment, in particular to a precious metal automatic activation ion exchange resin tower system.

The existing precious metal ion exchange resin tower group for adsorbing precious metal is mainly a water pump and a storage tank, and the precious metal waste liquid reaches the adsorption of precious metal when it is being washed by one or more resin towers, thereby generating waste water discharge. Manually switch valve 13a, valve 15a, valve 22a, valve 26a in Figure 1 while other valves are closed, and other valves are closed. After a period of positive washing, suspended matter contamination in the resin tower will cause the resin layer to become clogged. During washing, the valve 11a, valve 14a, valve 21a, and valve 24a shown in Figure 2 are manually switched, and other valves are closed. Waste water is discharged during backwashing. If the situation is serious, the resin must be removed and cleaned before being loaded into the tower.

Because there is only one water pump and one front end tank containing precious gold, when the resin needs to be pretreated and contaminated (such as silicide, organic matter, suspended matter, etc.), the regeneration and treatment of the resin cannot be achieved by conventional techniques and manual forward and reverse washing. Resin pollution. Because new resins require pretreatment, new resins often contain a small amount of organic oligomers and inorganic impurities, and they will gradually dissolve and release during the initial use. Relying on conventional techniques and manual backwashing alone cannot ensure that the resin is fully regenerated. And restore the resin adsorption capacity, leading to the loss of precious metals in subsequent processing. When the resin is contaminated, suspended matter blocks the gaps in the resin layer, which increases its resistance to water flow, and also covers the surface of the resin particles, thus reducing its work exchange capacity. It is impossible to rely on conventional techniques and manual backwashing alone. Scientifically and effectively achieve a fixed flow rate at the appropriate time, and even cause damage to the pump and loss of precious metals. Because of the conventional technology, there is only one water pump and one front-end gold-containing water tank for manual forward and reverse washing. When the forward washing is just started, the water flow is unstable, and some precious gold-containing wastewater will be discharged to the wastewater discharge through the resin layer. In a non-compact state, most of the precious metal-containing wastewater will be discharged to the wastewater discharge through the resin layer, leading to the loss of treated precious metals. The conventional technique is manual forward and reverse washing, which causes different degrees of resin pollution in different precious gold wastewater and external environments. When manual forward and reverse washing, it is difficult to effectively deal with the instability of water flow caused by resin pollution. The loss of precious metals is labor-intensive and inefficient.

Summarize the above-mentioned conventional technical problems: (1) Pre-treatment of new resins cannot guarantee sufficient regeneration of resins, leading to the loss of precious metals in subsequent processing; (2) When the resins are contaminated, it cannot scientifically and effectively reach a fixed flow rate at an appropriate time, and even cause pump damage and precious metals Loss; (3) Resin is in a non-compact state when the front and back washing are alternated, leading to the loss of precious metals; (4) It is labor-intensive and inefficient, and even causes manual misoperation.

Therefore, in order to overcome the shortcomings in the conventional technology, the object of the present invention is to provide a system for automatically activating an ion exchange resin column of precious metals.

In order to solve the above technical problems, a precious metal automatic activated ion exchange resin tower system of the present invention includes a precious liquid waste storage tank, a forward washing pump, a discharge circuit, and a plurality of resin towers. The forward washing pump is connected to the resin tower through a forward washing pipe. The flushing circuit, the resin tower flushing circuit communicates with the top of each resin tower; the bottom of each resin tower is connected to the circulation circuit through a pipeline, and the circulation circuit communicates with the resin tower flushing circuit, and also includes a resin activator storage barrel, which is connected with The wash pump is connected. The backwash pump communicates with the circulation circuit through the backwash tube. The backwash tube and the forward wash tube are connected to two interfaces of the three-way valve of the forward and backwash, and the other interface of the three-way valve of the forward and reverse wash. It is connected to the drain circuit, and the circulation circuit is also connected to the backwash pipe. A backwash pump and a backwash tube are set, and the resin is flushed upward from the bottom of each resin tower, so that the resin can be fully washed and activated.

Further, it further comprises a compressed air circuit, the compressed air circuit is in communication with the bottom of each resin tower, and the compressed air circuit is further provided with a compressed air regulating valve and a solenoid valve. The gas shocks the resin from the bottom to the top, so that the resin is in a suspended loose state, and the retentate on the surface of the resin can fully elute the backwash blisters.

Further, an electric valve is respectively provided between the forward and reverse washing electric three-way valve and the forward washing pipe and the reverse washing pipe, and a backup circuit is provided around the two electric valves. And the drain circuit is communicated, and electric valves are respectively provided on the pipelines connecting the backup circuit to the forward washing pipe and the reverse washing pipe. When the forward and reverse washing electric three-way valve fails to work, adjust the opening and closing of the electric valve on the standby circuit, and the electric valve between the forward and reverse washing electric three-way valve and the forward and reverse washing pipe and backwashing pipe to start the backup. The circuit bypasses the positive and negative washing electric three-way valve. At this time, the positive and negative washing electric three-way valve can be repaired or replaced.

Further, a drain circulation electric three-way valve is provided in parallel at the end of the drain circuit. Two interfaces of the drain circulation electric three-way valve are connected to the drain circuit, and the other interface is connected to the precious liquid waste storage tank through a return water pipe. By switching the drain circulation electric three-way valve, you can choose whether the discharge circuit is connected to the storage tank containing precious gold waste liquid or directly discharge the waste liquid.

Further, the discharge circuit and the return water pipeline are communicated through a pipeline provided with an electric valve, which can directly bypass the drainage circulation electric three-way valve, and can be used as a backup. An electric valve is set at the interface, and an electric valve is set at the end of the discharge circuit. The on-off of each electric valve is set to control the flow of waste liquid.

Further, the resin tower flushing circuit includes a plurality of pipelines connected in parallel and each provided with the same number of electric valves as the resin towers. The multiple pipelines are merged into an inlet above each resin tower. A pipeline is connected, and the position where the circulation circuit communicates with one of the pipelines is between two adjacent electric valves on the pipeline.

Further, the circulation loop includes a plurality of pipelines connected in parallel and each provided with the same number of electric valves as the resin tower, and one of the pipelines communicates with the resin tower flushing circuit, and the plurality of pipelines merge into one at the bottom of each resin tower and communicate with The bottoms of the respective resin towers are respectively communicated.

Further, a regulating valve, an upper and lower limit flow meter switch, and a check valve are sequentially arranged on the forward washing pipe and the reverse washing pipe.

Further, a communication pipe is provided between the forward washing pump and the backwash pump, and a switching valve is provided on the communication pipe. When one of the pumps fails, the switching of the switching valve can be used to replace the failed pump with the other pump, and the failed pump can be replaced without affecting production.

Further, a check valve is provided on the discharge circuit to prevent waste liquid from flowing back into the resin tower.

Beneficial effects: A noble metal automatic activation ion exchange resin tower system according to the present invention can solve the problems of the conventional technology: (1) pretreatment of new resin to make it fully regenerate, and subsequent treatment of noble metal to increase the resin exchange amount; (2) use of resin It will reduce the pollution level and increase the amount of precious metal resin exchange; (3) the precious metal will not be lost during the forward and reverse washing; (4) the use of automatic control processing workflow and principles, and effective scientific management to replace manual operations, thereby improving efficiency.

Compared with the conventional technology, the invention has the advantages: because the new resin in the early stage of the invention has a stable flow during pretreatment and use, and automatically removes the degree of resin contamination, improves the efficiency of adsorbing precious gold, and increases the resin exchange amount, ensuring that the effluent is not Exceeding standards. Because the present invention does not require human operation, it greatly saves labor maintenance costs and equipment damage and loss of precious gold due to personnel's misoperation or poor maintenance. Because the present invention does not cause the effluent to exceed the standard due to resin pollution, it can save the frequency of new resin replacement and achieve savings in resin consumption. Because the present invention adopts automatic control and adopts scientific instruction parameters, it can effectively adjust such as forward and reverse washing time, compressed air pressure and flow rate, backwash activated activator in the water tank and estimated resin containing precious gold percentage and receiving time, etc. The precious gold-containing waste liquid has different parameter settings and controls.

The present invention will be further described below with reference to the drawings.

A noble metal automatic activation ion exchange resin tower system as shown in FIG. 3 and FIG. 4 includes a precious liquid waste storage tank 1, a forward washing pump 5, a discharge circuit 61, and a plurality of resin towers. The forward washing pump 5 passes forward washing The pipe 9 is connected to the resin tower flushing circuit 7, the resin tower flushing circuit 7 communicates with the top of each resin tower; the bottom of each resin tower is connected to the circulation circuit 8 through a pipeline, and the circulation circuit 8 communicates with the resin tower flushing circuit 7, and also includes resin activation The agent storage barrel 2 communicates with the backwash pump 6 through a pipeline, the backwash pump 6 communicates with the circulation circuit 8 through the backwash tube 10, and the backwash tube 10 and the forward wash tube 9 are respectively connected to the forward and backwash electric three-way valve 3 Two of the interfaces are connected, the other interface of the forward and reverse washing electric three-way valve 3 is in communication with the drain circuit 61, and the circulation circuit 8 is also in communication with the backwash pipe 10. A regulating valve 91, an upper and lower limit flow meter switch 93, a sampling port 92, and a check valve 94 are sequentially provided on the forward washing pipe 9 in the order of the liquid flow direction, and an adjusting valve 101 and the upper and lower limit flow meters are sequentially provided on the back washing pipe 10 in the liquid direction. Switch 102, sampling port 103, and check valve 104. Communication pipes 64 and 52 are provided between the forward washing pump 5 and the backwash pump 6, and switching valves are installed on the communication pipes 64 and 52. When one of the pumps fails, the switching of the switching valve can be used to replace the failed pump with the other pump, and the failed pump can be replaced without affecting production. The discharge circuit 61 is provided with a check valve 62 to prevent waste liquid from flowing back into the resin tower. A backwash pump 6 and a backwash pipe 10 are provided to flush upward from the bottom of each resin tower, so that the resin can be fully flushed and activated. The system of the present invention further includes a compressed air circuit 51, which is in communication with the bottom of each resin tower. The compressed air circuit 51 is also provided with a compressed air regulating valve and a solenoid valve for regulating the on-off and gas flow of the compressed air. . The gas shocks the resin from bottom to top, so that the resin is in a suspended loose state, and the retentate on the resin surface can be fully eluted by the backwash water. An electric valve 31 and an electric valve 32 are respectively provided between the forward and reverse washing electric three-way valve 3 and the forward washing pipe 9 and the reverse washing pipe 10, and a backup circuit 4 is provided around the two electric valves. The washing pipe 9, the back washing pipe 10, and the discharge circuit 61 communicate with each other, and the electric valve 41 and the electric valve 32 are provided on the pipelines connecting the standby circuit 4 to the forward washing pipe 9 and the back washing pipe 10, respectively. When the forward and reverse washing electric three-way valve 3 fails to work, adjust the opening and closing of each electric valve on the standby circuit 4 and the electric power between the forward and reverse washing electric three-way valve 3 and the forward washing pipe 9 and the reverse washing pipe 10. The valve 31 and the electric valve 32 can start the backup circuit 4 and bypass the forward and reverse washing electric three-way valve 3. At this time, the forward and reverse washing electric three-way valve 3 can be repaired or replaced. A drain circulation electric three-way valve 71 is arranged in parallel at the end of the drain circuit 61. Two interfaces of the drain circulation electric three-way valve 71 are connected to the drain circuit 61, and the other interface is connected to the precious liquid waste storage tank 1 through a return water pipe 72. . By switching the drainage circulation electric three-way valve 71, it is possible to select whether the discharge circuit 61 is connected to the gold-containing waste liquid storage tank 1 or directly discharges the waste liquid. The drain circuit 61 and the return water line 72 communicate with each other through a pipeline provided with an electric valve 73, which can directly bypass the drainage circulation electric three-way valve 71 and can be used as a backup. The drainage circulation electric three-way valve 71 is connected to the drainage circuit 61. The interface is provided with an electric valve 76, the electric circuit of the drainage circulation electric three-way valve 71 and the return water line 72 are provided with an electric valve 75, an electric valve 74 is provided at the end of the discharge circuit 61, and the waste is controlled by setting the on and off of each electric valve. The flow of liquid. The resin tower flushing circuit 7 includes a plurality of pipelines connected in parallel and each provided with the same number of electric valves as the resin tower. The multiple pipelines are merged into the inlet above each resin tower. The circulation circuit 8 and the resin tower flushing circuit 7 One of the pipelines is in communication, and the position where the circulation circuit 8 communicates with one of the pipelines is between the two adjacent electric valves on the pipeline. The circulation loop 8 includes a plurality of pipelines connected in parallel and each provided with the same number of electric valves as the resin tower. One of the pipelines communicates with the resin tower flushing circuit 7, and a plurality of pipelines merge into one at the bottom of each resin tower and communicate with The bottoms of the respective resin towers are respectively communicated.

The above-mentioned summary of the invention is further explained below through specific embodiments.

The work of the present invention mainly includes the following work processes:

As shown in the flow direction indicated by the arrow in the figure 4 and the figure, the pre-stage new resin pretreatment process in the resin tower: using a resin activator storage bucket 2 for pure water, and washing the electric three-way valve 3 and its surrounding electric valves to Electric valve 31, electric valve 32 is open, electric valve 41, electric valve 42 are closed, the air source connected to the compressed air circuit 51 is activated, and compressed air is introduced into resin tower A and resin tower B for a few seconds, and then the backwash pump is started 6 pump resin activator storage tank 2 backwash pure water in resin tower A and resin tower B, using the principle of blister to expand the resin expansion rate of more than 90%, stop the input of compressed air and then backwash the pump 6 seconds Stop, at this time, the internal air can be discharged with water, and then use the precious gold-containing waste liquid storage tank 1 for pure water. As shown by the flow direction indicated by the arrow in Figure 3 and the figure, the positive washing pump 5 pumps the precious gold-containing waste liquid. The pure water in the storage tank 1 is used to wash the resin layers in the resin tower A and resin tower B. During the control of the forward and reverse washing electric three-way valve 3 and the drainage cycle electric three-way valve 71 by PLC, the discharge is included in the discharge. Precious gold waste liquid storage tank 1 circulates, backwash and drain into resin activator storage bucket 2 During the period when the positive and reverse washing flow exceeds the upper and lower limits, the upper and lower limit flowmeter switch 93 or the upper and lower limit flowmeter switch 102 alarms and repeats the forward and reverse washing 2-3 times until the water is clear, odorless, and no fine resin, and the resin layer is dense. After entering the production to adsorb precious gold ions.

As shown in Figure 3, the normal production process: when the water level in the precious liquid-containing waste storage tank 1 reaches the starting limit, the forward and reverse washing electric three-way valve 3 switches the forward washing position, that is, the electric valve 32 opens, the electric valve 31 opens, and the electric The valve 41 and the electric valve 42 are closed, and the drainage cycle electric three-way valve 71 switches the cycle position, that is, the electric valve 75, the electric valve 76 is opened, the electric valve 74, and the electric valve 73 are closed. After the above setting is completed, the forward washing pump 5 is started, and the water in the precious liquid containing waste liquid storage tank 1 is pumped for a few seconds. The drain circulation electric three-way valve 71 is switched to the waste water discharge position, that is, the electric valve 75 is closed and the electric valve 76 is opened. The forward washing time can be adjusted to adsorb precious metal ions. When the time reaches the set positive washing time, the forward washing pump 5 stops. As shown in FIG. 4, the forward and reverse washing electric three-way valve 3 switches the reverse washing position, that is, the electric valve 31, which is electrically operated. Valve 32 is open, electric valve 41, electric valve 42 are closed, and the drainage circulation electric three-way valve 71 is switched to the precious liquid waste storage tank 1, that is, electric valve 74, electric valve 73 are closed, electric valve 76, and electric valve 75 are opened At this time, the air source connected to the compressed air circuit 51 is started. After the compressed air enters each resin tower for several seconds, the backwash pump 6 is started to pump pure water in the resin activator storage bucket 2 to backwash the resin layers in each resin tower for several seconds. The rear drainage cycle electric three-way valve 71 is switched to the waste water discharge position, that is, the electric valve 75, the electric valve 76 is opened, the electric valve 73, the electric valve 74 are closed, the backwash time can be adjusted, and the solenoid valve of the compressed air circuit 51 is advanced by a few seconds. Stop compacting The air enters each resin tower. At this time, the air inside each resin tower can be exhausted by water. When the time reaches the set backwash time, the backwash pump 6 stops. When the water level in the precious liquid waste storage tank 1 does not reach the lower limit of stopping. , Repeat the normal washing and normal production. When the water level in the gold-containing waste liquid storage tank 1 reaches the lower limit of stopping, the system stops working and waits. The next time the water level reaches the upper limit of activation, continue the previous time control actions and parameters. When the lower limit flow rate is reached, the upper or lower limit flow meter switch 93 or the upper or lower limit flow meter switch 102 alarms.

The invention adopts two water tanks: a storage tank 1 containing waste liquid containing precious gold and a storage tank 2 for resin activator, which can be used as a water tank for pretreatment of new resin, which automatically activates the resin during normal production and prevents the loss of precious gold, which is in accordance with the conventional technology In contrast, the conventional technology uses a storage tank for waste liquid containing precious gold, which cannot automatically perform new resin pretreatment and cannot activate the resin during normal production, thus causing the loss of precious gold.

The present invention adopts a combination of a forward washing pump 5 and a reverse washing pump 6. In normal production, the forward washing pump is used for the forward washing process, and the reverse washing pump is used for the reverse washing process. In an automated manner, two water pumps can be used instead of standby. Known technology uses only one forward washing pump, which can produce normal washing normally, but requires manual switching of the valve for back washing, and there is no backup pump. When the forward washing pump is damaged or malfunctions, there is no replacement, which affects the work progress.

The invention adopts a compressed air structure, and uses a compressed air circuit 51 to connect a compressed air source and two resin towers, which can be automatically set to operate in conjunction with the backwash pump 6 to form a water bubble principle to reduce the degree of resin contamination and ensure that the flow rate is stable and the adsorption is increased during forward washing The efficiency of precious gold and the increase of resin exchange volume ensure that the effluent does not exceed the standard, but the original technology does not have this function.

The resin tower flushing circuit 7 includes a plurality of pipelines connected in parallel and each provided with the same number of electric valves as the resin towers. The number of the pipelines can be adjusted according to the number of the resin towers, and by adjusting the electric valves on each pipeline Opening and closing, you can choose the direction of liquid flow during forward or reverse washing, such as limiting whether the liquid passes through each resin tower in sequence or through multiple resin towers at the same time. Under normal circumstances, only one of the pipelines is activated, and the electric valves on the other pipelines are closed, and these pipelines are used as backup pipelines. When common pipelines have problems, the electrical pipelines can be switched by switching the electrical valves. The maintenance of damaged pipelines does not affect normal production.

The circulation loop 8 includes a plurality of pipelines connected in parallel and each provided with the same number of electric valves as the resin tower. One of the pipelines communicates with the resin tower flushing circuit 7, and a plurality of pipelines merge into one at the bottom of each resin tower and communicate with The bottoms of the respective resin towers are respectively communicated. The function of multiple pipelines is also for backup. By switching the opening and closing of the electric valve on each pipeline and choosing different paths, different washing methods for the resin tower can be realized.

For example, in the embodiment of the present invention, two resin towers, resin tower A and resin tower B, are used. Then, from resin tower A to resin tower B, the resin is being washed in sequence, and from resin tower B to resin tower A. The electric valves 13, 15, 22, and 26 on the tower flushing circuit 7 and the circulation circuit 8 are opened, and the electric valves 11, 12, 14, 16, 21, 23, 24, and 25 are all closed, and the pump 5 is being washed during forward washing When starting and backwashing, the forward washing pump 5 stops and the backwashing pump 6 starts to work, and the liquid flows through the above-mentioned open electric valve in turn, and then passes through resin tower A and resin tower B in sequence.

When a resin tower needs to be flushed separately, if the resin tower A is flushed separately, the electric valves 11, 14 are opened, other electric valves are closed, and the backwash pump 6 is started; if the resin tower B is flushed separately, the electric valve 21 is opened , 24, close other electric valves, start the backwash pump 6, and you can. The above-mentioned arrangement of the opening and closing of the electric valve is not unique, and different flushing modes can be realized through the combination of opening and closing between different electric valves.

Comparison of actual cases: the conventional technology resin tower system uses a total of 65T of water per day, the concentration of gold in the incoming water is 0.9ppm, and the effluent is greater than 0.3ppm, and the material needs to be collected. Working hours of the maintenance cycle: 3 times a week in the conventional technology, 2 people / Times, 8 hours / time, the present invention is once a week, 1 person / time, 4 hours / time, the original technology is 48 hours a week, the invention is 4 hours a week, saving 91.6% of manpower, saving manpower and traffic each week , Meal expenses saved weekly labor costs totaled RMB 1300 yuan.

Receiving cycle and gold: the water needs to be reclaimed if the effluent is greater than 0.3ppm. The original technology has a total resin weight of 90KG. It receives 0.4% gold every 20 days, and receives 540 grams of gold per month. The received material contains more than 0.5625% of gold, the resin can save more than 97.5KG (saving RMB1950 yuan) in 2.5 months, the gold content can be increased by more than 40%, and the resin material cost can be saved more than RMB195 per week. Revenue of resin gold adsorption increased by more than 40%.

Equipment abnormality: The original technology damages one pump every 1.5 months (RMB 1800), and the fine for one month is RMB 750. The invention has not been abnormal for 2.5 months, and the equipment abnormality fee has been saved over RMB 1,050 per week.

Based on the above, it can save more than RMB10,180 per month and increase the income by more than 40%.

The above descriptions and descriptions are merely illustrations of the preferred embodiments of the present invention. Those with ordinary knowledge of this technology may make other modifications based on the scope of the patent application defined below and the above description, but these modifications should still be made. It is within the scope of rights of the present invention for the creative spirit of the present invention.

 1‧‧‧Precious gold waste liquid storage tank

10‧‧‧Backwash tube

101‧‧‧ regulating valve

102、93‧‧‧Flowmeter switch

103‧‧‧Sampling port

104, 62, 63, 94‧‧‧ check valve

11, 12, 13, 14, 15, 16, 21, 22, 23, 24, 25, 26, 31, 32, 41, 42, 73, 74, 75, 76‧‧‧ electric valve

11a, 13a, 15a, 21a, 22a, 24a, 26a

2‧‧‧Resin activator storage bucket

3‧‧‧ Forward and reverse washing electric three-way valve

4‧‧‧ backup circuit

5‧‧‧Flushing pump

51‧‧‧Compressed air circuit

52, 64‧‧‧ connecting pipe

53‧‧‧Gas flow meter

6‧‧‧Backwash pump

61‧‧‧Drain circuit

7‧‧‧Resin tower flushing circuit

71‧‧‧Drain circulation electric three-way valve

72‧‧‧Backwater pipeline

8‧‧‧Circle

9‧‧‧ washing tube

91‧‧‧ regulating valve

92‧‧‧Sampling port

A‧‧‧direction resin tower

B‧‧‧resin tower

FIG. 1 is a schematic diagram of a conventional technology resin tower forward washing process, the arrows in the figure show the flow direction of the liquid during forward washing; FIG. 2 is a conventional technique resin tower back washing flow diagram, the arrows show the direction of the liquid flow during back washing; Figure 3 is a schematic diagram of the forward washing process of the present invention, and the arrows in the figure show the liquid flow direction during the forward washing; Figure 4 is a schematic diagram of the reverse washing process of the present invention, and the arrows in the figure are the liquid flow direction and the air in the compressed air pipeline during the reverse washing. Flow direction

Claims (10)

A precious metal automatic activation ion exchange resin tower system includes a precious liquid waste storage tank, a forward washing pump, a discharge circuit, and a plurality of resin towers. The forward washing pump is connected to the resin tower flushing circuit through a forward washing pipe, and the resin tower flushing circuit and each The top of the resin tower is connected; the bottom of each resin tower is connected to a circulation loop through a pipeline, and the circulation circuit is connected to the resin tower flushing circuit. It is characterized in that it also includes a resin activator storage barrel, which is connected to the backwash pump through a pipeline, and The washing pump communicates with the circulation circuit through the backwash pipe, and the backwash pipe and the forward washing pipe are respectively connected to two interfaces of the forward and reverse washing electric three-way valve, and the other interface of the forward and reverse washing electric three-way valve is connected to the discharge circuit. The circulation loop is also in communication with the backwash tube. The precious metal automatic activation ion exchange resin tower system according to claim 1, further comprising a compressed air circuit, the compressed air circuit communicates with the bottom of each resin tower, and the compressed air circuit is further provided with a compressed air regulating valve and a solenoid valve. The precious metal automatic activation ion exchange resin tower system according to claim 1, wherein an electric valve is provided between the forward and reverse washing electric three-way valve and the forward washing pipe and the reverse washing pipe, and the periphery of these two electric valves is also A backup circuit is provided. The backup circuit is in communication with the forward washing pipe, the backwash pipe, and the discharge circuit. Electrically-operated valves are provided on the pipelines connecting the standby circuit with the forward washing pipe and the backwash pipe. The noble metal automatic activation ion exchange resin tower system according to claim 1, wherein a drain circulation electric three-way valve is provided in parallel at the end of the discharge circuit, two interfaces of the drain circulation electric three-way valve are connected to the discharge circuit, and the other interface is passed back The water pipeline is connected to a storage tank containing waste liquid containing precious gold. The noble metal automatic activation ion exchange resin tower system according to claim 4, wherein the discharge circuit and the return water pipeline are communicated through a pipeline provided with an electric valve, and the drainage circulation electric three-way valve is connected to the discharge circuit and the return water pipeline. An electric valve is set at the interface, and an electric valve is set at the end of the discharge circuit. The precious metal automatic activation ion exchange resin tower system according to claim 1, wherein the resin tower flushing circuit includes a plurality of pipelines connected in parallel and each provided with the same number of electric valves as the resin towers, and the plurality of pipelines are in each resin tower The upper inlet merges into a single path, and the circulation loop is in communication with one of the pipes of the resin tower flushing circuit. The position where the circulation loop communicates with one of the pipes is between the two adjacent electric valves on the pipe. The precious metal automatic activation ion exchange resin tower system according to claim 1, wherein the circulation loop includes a plurality of pipelines connected in parallel and each provided with the same number of electric valves as the resin tower, and one of the pipelines communicates with the resin tower flushing circuit A plurality of pipes merge into one at the bottom of each resin tower and communicate with the bottom of each resin tower. The precious metal automatic activation ion exchange resin tower system according to claim 1, wherein a regulating valve, an upper and lower limit flow meter switch, and a check valve are sequentially arranged on the forward washing pipe and the back washing pipe. The precious metal automatic activation ion exchange resin tower system according to claim 1, wherein a communication pipe is provided between the forward washing pump and the backwash pump, and a switching valve is provided on the communication pipe. Precious metal automatic activation ion exchange resin tower system according to claim 1, wherein a check valve is provided on the discharge circuit