CN213771638U

CN213771638U - Semi-automatic treatment system for heavy metal ions in waste acid

Info

Publication number: CN213771638U
Application number: CN202022787321.4U
Authority: CN
Inventors: 张倩倩; 裴晓东; 骆艳华; 佘世杰; 刘晨
Original assignee: Sinosteel Nanjing New Material Research Institute Co Ltd; Sinosteel New Materials Co Ltd
Current assignee: Sinosteel Nanjing New Material Research Institute Co Ltd; Sinosteel New Materials Co Ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-07-23
Anticipated expiration: 2030-11-26

Abstract

The utility model discloses a heavy metal ion semi-automatization processing system in spent acid belongs to the spent acid field of handling. Poor and the slow problem of efficiency of spent acid treatment effect among the prior art, the utility model provides a heavy metal ion semi-automatization processing system in spent acid, it includes acid-base reaction chamber, be equipped with pH probe and agitating unit in the acid-base reaction chamber, one side of acid-base reaction chamber with send alkali device to be connected, the opposite side is connected with solid-liquid separation equipment, send alkali device and pH probe to equally divide do not to be connected with the controller electricity, the controller is sent opening or closing of alkali device according to the information control of pH probe, and liquid among the solid-liquid separation equipment enters into the repetitive reaction among the acid-base reaction chamber through the long transmission pipe. The utility model discloses a pH probe monitoring, the speed that the controller sent alkali in the alkali device through control reaches the pH in the balanced acid-base reaction chamber, makes it remain stable, and work efficiency is high and cyclic utilization, and it is better not only to have practiced thrift the resource but also has guaranteed heavy metal ion's among the spent acid treatment effect.

Description

Semi-automatic treatment system for heavy metal ions in waste acid

Technical Field

The utility model belongs to the spent acid field of handling, more specifically say, relate to a heavy metal ion semi-automatization processing system in spent acid.

Background

The titration method for reducing potassium dichromate by titanium trichloride from iron ore is a traditional method for measuring various iron phases such as total iron, magnetic iron, metallic iron and the like in iron ore, the pH value of waste acid generated by the method is very low, and the solution contains a large amount of heavy metal trivalent chromium ions. The existing laboratory uses the waste acid to discharge directly and will cause the great harm to the environment, there is also laboratory to utilize acid-base to neutralize the precipitation method to process, this method is simple, the salt content is low, the effluent water is of good quality, the waste acid solution can be discharged after needing to be treated and reaching the emission standard specially, confirm at first that there is no danger even mix acid, alkali solution each other, drip the industrial alkali in the waste acid solution. And then, a pH meter is used for testing, so that the added waste acid and the industrial alkali are fully reacted until the pH value of the solution is about 7, and finally the solution is discharged after being detected to be qualified. However, the traditional acid-base neutralization precipitation method needs manual operation, wastes time and labor, and wastes resources seriously.

Corresponding improvement has also been carried out to above-mentioned problem, like chinese patent application No. CN201922383542.2, the publication date is 2020, 10, 9, this patent discloses spent acid miniaturized processing equipment, including sediment storage pond, monitoring module, pH adjusting module and data processing module, monitoring module locates in the sediment storage pond, pH adjusting module locates sediment storage pond top, monitoring module, pH adjusting module and data processing module communication connection. The waste acid miniaturized treatment equipment can monitor the content of heavy metal ions in the waste acid, and the weight of the heavy metal settling agent required to be added is calculated by a system to automatically add the agent; when the content of heavy metal ions reaches the standard, the dosing can be automatically stopped. The disadvantages of the patent are that: the whole cost is high, and the treatment effect is not ideal.

As another example, chinese patent application No. CN201920916121.9, published as 2020, 4.7.a, discloses a waste acid recycling and treating apparatus, and a waste acid solution enters a settling tank through a conveying pipe, and then sequentially enters a primary membrane system, an electrolysis apparatus, a secondary membrane system, an acid-base neutralization tank, and a liquid storage tank through the conveying pipe; the electrolytic device comprises an electrolytic tank, a rotating device is installed at the bottom of the electrolytic tank, a plurality of electrolytic cells are arranged on the rotating device in an equidistant mode, a waste liquid outlet is formed in the periphery of the bottom of each electrolytic cell, an acid liquid inlet and a clear liquid outlet are formed in the top of each electrolytic cell, a conveying pipeline is connected with the acid liquid inlet of a first electrolytic cell, the clear liquid outlet of the first electrolytic cell is connected with the acid liquid inlet of the next adjacent electrolytic cell and sequentially connected, and the clear liquid outlet of the last electrolytic cell is connected with a secondary membrane system. The disadvantages of the patent are that: the equipment is complicated, the cost is high, the sealing performance is poor, and leakage is easy to cause.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

Poor and the slow problem of efficiency of spent acid treatment effect among the prior art, the utility model provides a heavy metal ion semi-automatization processing system in spent acid. The utility model discloses a pH probe is real-time to be monitored and feedback signal gives the controller acid-base reacting chamber, and the speed that the controller sent alkali in the device through control reaches the pH in the balanced acid-base reacting chamber, makes it remain stable, and work efficiency is high and cyclic utilization, and it is better not only to have practiced thrift the resource but also to have guaranteed heavy metal ion's among the spent acid treatment effect.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides a heavy metal ion semi-automatization processing system in spent acid, includes acid-base reaction chamber, is equipped with pH probe and agitating unit in the acid-base reaction chamber, and one side of acid-base reaction chamber is connected with sending alkali device, and the opposite side is connected with solid-liquid separation equipment, send alkali device and pH probe to equally divide and be connected with the controller electricity respectively, and the controller is sent opening or closing of alkali device according to the information control of pH probe, and liquid among the solid-liquid separation equipment enters into acid-base reaction chamber through the long delivery pipe and reacts repeatedly.

Furthermore, the solid-liquid separation device comprises a feeding pipe connected with the acid-base reaction chamber, a sample feeding pump is arranged on the feeding pipe, the feeding pipe is connected with the centrifugal dehydrator, a liquid outlet and a solid outlet are arranged on the centrifugal dehydrator, and liquid at the liquid outlet is connected with the acid-base reaction chamber through a long conveying pipe.

Furthermore, a liquid collecting tank is arranged below the liquid outlet, a solid collecting tank is arranged below the solid outlet, and the liquid collecting tank is connected with the acid-base reaction chamber through a long conveying pipe.

Furthermore, valves are arranged at the liquid outlet and the solid outlet.

Furthermore, the stirring device comprises a motor and a rotating rod connected with the motor, and a stirring paddle is arranged at the bottom of the rotating rod.

Furthermore, the stirring paddles are symmetrically arranged at the bottom of the rotating rod.

Furthermore, the alkali conveying device comprises a tank body for containing alkali and a conduit connected with the tank body, wherein a peristaltic pump is arranged on the conduit, the peristaltic pump is electrically connected with the controller, the conduit is connected with a conveying pipe, and the conveying pipe extends into the acid-base reaction chamber.

Further, the pH probe is disposed within the shield.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a pH probe is real-time to the pH in the acid-base reaction chamber to be monitored, and feeds back the signal to the controller in real time, and when the pH value in the acid-base reaction chamber was higher than or is less than the setting value, the controller sent the indoor speed that industrial alkali entered into the acid-base reaction chamber in the alkali device through control and reached the indoor pH of balanced acid-base reaction, made it keep in a stable value, automatic control alkali addition volume and speed, improved precision and accuracy, practiced thrift the cost of labor; the substances in the acid-base reaction chamber are sent to a solid-liquid separation device for solid-liquid separation, and the liquid enters the acid-base reaction chamber for repeated reaction, so that resources are saved and the treatment effect of heavy metal ions in the waste acid is better guaranteed through repeated recycling;

(2) the solid-liquid separation device comprises the feeding pipe, the feeding pipe extracts a solid-liquid mixture from the acid-base reaction chamber under the control of the sample conveying pump and conveys the solid-liquid mixture to the centrifugal dehydrator for solid-liquid separation operation, and the centrifugal dehydrator has good solid-liquid separation effect and simple structure; the solid and the liquid respectively flow out of different outlets, so that materials in different states can be collected conveniently, the working efficiency is effectively improved, and the working time is saved;

(3) the liquid collecting tank and the solid collecting tank are respectively arranged below the liquid outlet and the solid outlet, so that the liquid collecting tank and the solid collecting tank are convenient to collect in a centralized way, and the liquid or the solid is prevented from leaking to the external environment to cause environmental pollution; meanwhile, valves are arranged at the liquid outlet and the solid outlet, and the valves can control the flowing speed and quantity of liquid or solid, so that the adjustment can be conveniently carried out in real time according to the field condition, and the convenience and controllability of the operation are improved;

(4) the utility model adopts the motor as the power source, the output end of the motor is connected with the rotating rod, the bottom of the rotating rod is provided with the stirring paddle, the rotating rod drives the rotating rod through the motor, and the rotating rod drives the stirring paddle to rotate, so as to stir the materials in the acid-base reaction chamber; the power transmission is stable, the structure is simple, and the cost is low; the stirring paddles are symmetrically arranged at the bottom of the rotating rod, so that the waste acid and the industrial alkali can be timely and fully stirred and reacted, and the reaction effect is further improved;

(5) the utility model adopts the conduit to convey the industrial alkali in the tank body, enters the acid-base reaction chamber through the conveying pipe, and adopts the peristaltic pump to control the flow of the industrial alkali, the structure is simple, and the operation is convenient; and set up the pH probe in the protection casing, the protection casing plays the guard action to the pH probe, avoids it to receive external environment's interference, guarantees measuring result's accuracy and stability.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. an acid-base reaction chamber; 2. a solid-liquid separation device; 3. a conduit; 4. a peristaltic pump; 5. a delivery pipe; 6. a controller; 7. a pH probe; 8. a motor; 9. a stirring paddle; 10. rotating the rod; 11. a sample feeding pump; 12. a feed pipe; 13. a centrifugal dehydrator; 14. a liquid collection tank; 15. a valve I; 16. a solids collection tank; 17. a valve II; 18. a liquid feeding pump; 19. and (4) long conveying pipes.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings.

Example 1

As shown in fig. 1, a semi-automatic treatment system for heavy metal ions in waste acid comprises an acid-base reaction chamber 1, wherein the waste acid is directly discharged into the acid-base reaction chamber 1, the acid-base reaction chamber 1 is used for reacting the waste acid with industrial base, and a solid-liquid mixture exists in the acid-base reaction chamber 1 after the reaction. Be equipped with pH probe 7 and agitating unit in the acid-base reaction chamber 1, pH probe 7 carries out real-time supervision to the pH value in the acid-base reaction chamber 1, and is preferred, and pH probe 7 sets up in the protection casing, and the protection casing plays the guard action to pH probe 7, avoids it to receive external environment's interference, guarantees measuring result's accuracy and stability. The stirring device stirs the waste acid and the industrial alkali in the acid-alkali reaction chamber 1 to ensure the full mixing and reaction of the waste acid and the industrial alkali. One side of the acid-base reaction chamber 1 is connected with an alkali conveying device, and the alkali conveying device conveys industrial alkali into the acid-base reaction chamber 1 to react with waste acid; the other side is connected with the solid-liquid separation device 2, and the solid-liquid mixture is fed into the solid-liquid separation device 2 to realize solid-liquid separation because the solid-liquid mixture is left in the acid-base reaction chamber 1, so that different treatments can be conveniently carried out on materials in different states, and the working efficiency is improved. The alkali feeding device and the pH probe 7 are respectively electrically connected with the controller 6, the controller 6 controls the alkali feeding device to be opened or closed according to the information of the pH probe 7, when the pH probe 7 monitors that the pH value in the acid-base reaction chamber 1 is higher or lower than a set value, a signal is fed back to the controller 6, and the controller 6 balances the pH value in the acid-base reaction chamber 1 by controlling the speed and the flow rate of industrial alkali in the alkali feeding device entering the acid-base reaction chamber 1 so as to stably keep the pH value at the set value. Preferably, the controller 6 is a PID controller, which has a simple structure and is sensitive to movement. Simultaneously, liquid in the solid-liquid separation device 2 in the semi-automatic treatment system for heavy metal ions in waste acid enters the acid-base reaction chamber 1 through the long conveying pipe 19 for repeated reaction, the liquid separated from the solid-liquid separation device 2 is sent into the acid-base reaction chamber 1 again for reaction, repeated reaction is carried out on the liquid, the treatment effect of the liquid is better, and pollution caused by direct discharge of the liquid is avoided. The long-distance tube 19 is provided with a liquid-feeding pump 18, and the liquid-feeding pump 18 pumps the liquid into the long-distance tube 19 for transportation.

The utility model discloses a pH probe 7 carries out real-time supervision to acid-base reacting chamber 1, gives controller 6 with signal feedback simultaneously, then controller 6 control send the alkali device to enter into the flow and the speed of acid-base reacting chamber 1 and reach the pH value of balanced acid-base reacting chamber 1 then, and this process can effectively improve precision and accuracy, practices thrift the cost of labor, improves work efficiency. Meanwhile, the liquid in the solid-liquid separation device 2 enters the acid-base reaction chamber 1 again for reaction, so that the treatment of the liquid is further enhanced, the pollution caused by the discharge of unqualified waste liquid is avoided, and the treatment effect on waste acid is improved.

Specifically, in this embodiment, the solid-liquid separation device 2 includes a feeding pipe 12 connected to the acid-base reaction chamber 1, a sample feeding pump 11 is disposed on the feeding pipe 12, and the sample feeding pump 11 is responsible for feeding the solid-liquid mixture in the acid-base reaction chamber 1 into the feeding pipe 12. The feed pipe 12 is connected with a centrifugal dehydrator 13, and the solid-liquid mixture is subjected to solid-liquid separation in the centrifugal dehydrator 13. And the centrifugal dehydrator 13 is provided with a liquid outlet and a solid outlet, and the liquid at the liquid outlet is connected with the acid-base reaction chamber 1 through a long conveying pipe 19. In order to ensure that the solid and liquid can be completely collected and cannot leak to the external environment to cause environmental pollution, a liquid collecting tank 14 is arranged below the liquid outlet, a solid collecting tank 16 is arranged below the solid outlet, and the liquid collecting tank 14 is connected with the acid-base reaction chamber 1 through a long conveying pipe 19. The liquid collecting tank 14 and the solid collecting tank 16 are arranged to collect solid and liquid in a sealed and centralized manner, so that the solid and liquid can be conveniently treated by workers, and the working time is saved. Furthermore, the liquid outlet and the solid outlet are respectively provided with a valve, specifically, the liquid outlet is provided with a valve I15, the solid outlet is provided with a valve II17, the two valves can control the flowing speed and amount of liquid or solid, the adjustment can be conveniently carried out in real time according to the field situation, and the convenience and controllability of the operation are improved.

Example 2

Basically, in the same way as in embodiment 1, in this embodiment, the specific stirring device includes a motor 8, a rotating rod 10 connected to the motor 8, and a stirring paddle 9 is disposed at the bottom of the rotating rod 10. Adopt motor 8 as the power supply, be connected motor 8's output and dwang 10, motor 8 drive dwang 10, dwang 10 drive stirring rake 9 is rotatory to stir the spent acid and the industrial alkali in the acid-base reacting chamber 1, make its intensive mixing contact. The stirring device has stable power transmission, simple structure and low cost. In order to further guarantee the stirring effect, the stirring paddles 9 are symmetrically arranged at the bottom of the rotating rod 10, so that the contact area between the stirring paddles and waste acid and industrial alkali is increased, and the stirring efficiency and the stirring effect are improved.

Meanwhile, the specific alkali conveying device in the implementation comprises a tank body for containing alkali and a conduit 3 connected with the tank body, wherein a peristaltic pump 4 is arranged on the conduit 3, the peristaltic pump 4 is electrically connected with a controller 6, the conduit 3 is connected with a conveying pipe 5, and the conveying pipe 5 extends into the acid-base reaction chamber 1. Industrial alkali enters the acid-base reaction chamber 1 through the conveying pipe 5, the controller 6 controls the flow and the speed of the industrial alkali entering the acid-base reaction chamber 1 through controlling the peristaltic pump 4, the peristaltic pump 4 is simple to maintain, the precision and the stability are high, the self-priming capability is good, and the backflow phenomenon of the industrial alkali is effectively avoided. The whole alkali conveying device is simple in structure, low in cost and easy to maintain.

The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.

Claims

1. The utility model provides a heavy metal ion semi-automatization processing system in spent acid, includes acid-base reaction chamber (1), is equipped with pH probe (7) and agitating unit in acid-base reaction chamber (1), and one side of acid-base reaction chamber (1) is connected with sending alkali device, and the opposite side is connected its characterized in that with solid-liquid separation equipment (2): the alkali feeding device and the pH probe (7) are respectively electrically connected with the controller (6), the controller (6) controls the alkali feeding device to be opened or closed according to the information of the pH probe (7), and the liquid in the solid-liquid separation device (2) enters the acid-base reaction chamber (1) through the long conveying pipe (19) for repeated reaction.

2. The semi-automatic treatment system for heavy metal ions in waste acid according to claim 1, wherein: solid-liquid separation equipment (2) are equipped with on inlet pipe (12) including inlet pipe (12) be connected with acid-base reaction chamber (1) and send appearance pump (11), inlet pipe (12) are connected with centrifugal dehydrator (13), and are equipped with liquid outlet and solid export on centrifugal dehydrator (13), and the liquid in liquid outlet department is connected with acid-base reaction chamber (1) through long transmission pipe (19).

3. The semi-automatic treatment system for heavy metal ions in waste acid of claim 2, wherein: a liquid collecting tank (14) is arranged below the liquid outlet, a solid collecting tank (16) is arranged below the solid outlet, and the liquid collecting tank (14) is connected with the acid-base reaction chamber (1) through a long conveying pipe (19).

4. The semi-automatic treatment system for heavy metal ions in waste acid as claimed in claim 1 or 3, wherein: and valves are arranged at the liquid outlet and the solid outlet.

5. The semi-automatic treatment system for heavy metal ions in waste acid according to claim 1, wherein: the stirring device comprises a motor (8) and a rotating rod (10) connected with the motor (8), and a stirring paddle (9) is arranged at the bottom of the rotating rod (10).

6. The semi-automatic treatment system for heavy metal ions in waste acid according to claim 5, wherein: the stirring paddles (9) are symmetrically arranged at the bottom of the rotating rod (10).

7. The semi-automatic treatment system for heavy metal ions in waste acid as claimed in claim 1 or 5, wherein: the alkali conveying device comprises a tank body for containing alkali and a conduit (3) connected with the tank body, wherein a peristaltic pump (4) is arranged on the conduit (3), the peristaltic pump (4) is electrically connected with a controller (6), the conduit (3) is connected with a conveying pipe (5), and the conveying pipe (5) extends into the acid-alkali reaction chamber (1).

8. The semi-automatic treatment system for heavy metal ions in waste acid according to claim 7, wherein: the pH probe (7) is arranged in the protective cover.