Heavy metal capturing agent preparation apparatus

Abstract

The application discloses a kind of heavy metal trapping agent's preparation equipment of heavy metal trapping agent preparation technical field, including mixing tank, extraction tank, rectifying tank and controller, the raw material pipe for conveying reaction liquid is communicated with mixing tank, the circulating pipe for circulating extractant and the supplement pipe for supplementing extractant, mixing tank is communicated with extraction tank by first conveying pipe, and first conveying pipe is communicated with first solenoid valve, controller is used to receive temperature information collected by temperature sensor and gas pressure information collected by baroceptor control stirring device, first solenoid valve and pressure relief valve operation, controller is also used to receive detection information received by signal processing circuit and control cable winder, pipe winder and water pump operation.The application, using conical detection probe detects after extraction upper layer liquid and lower layer liquid, accurately obtains the interface position between each liquid level, then extracts upper liquid by extraction pipe.

Description

Technical Field

[0001] This invention belongs to the field of heavy metal scavenging agent preparation technology, specifically the equipment for preparing heavy metal scavenging agents. Background Technology

[0002] Heavy metal chelating agents are chemical agents that strongly chelate with heavy metal ions. They can chemically react with various heavy metal ions such as Cu2+, Cd2+, Hg2+, Pb2+, Mn2+, Ni2+, Zn2+, and Cr3+ in wastewater at room temperature and within a wide pH range, and rapidly generate insoluble, low-water-content, easily filtered flocculent precipitates in a short time. Chemicals that remove heavy metal ions from water are called heavy metal chelating agents.

[0003] The preparation of heavy metal scavengers involves the following steps: cross-linking reaction, neutralization, filtration and washing, extraction, purification, and drying. Among these, the extraction step is particularly critical, as its quality directly affects the quality of the final heavy metal scavenger. Existing technologies include numerous extraction devices, such as the precise extraction device described in Chinese patent document CN109481960A. This device includes a support rod and an extraction vessel, as well as a buffer chamber and a scale. The extraction vessel is located at the top of the support rod, with an inlet at its top. The bottom of the extraction vessel is connected to the buffer chamber via a pipeline. A first switch is installed between the extraction vessel and the buffer chamber via the pipeline, and a scale is also present on the pipeline. A second switch is installed at the lower end of the buffer chamber via a pipeline, and the pipeline after the second switch is connected to the outlet, which is bendable. This invention effectively buffers the extract by setting up a buffer chamber. At the same time, the first and second switches are set up at the top and bottom, respectively. With the help of a scale, the liquid level of the extract can be precisely controlled. This makes the extraction process safer. After the first switch is closed, the buffer chamber is used to adjust the second switch to achieve precise extraction. The bend in the pipeline also ensures that the extract does not flow too fast, thus ensuring the extraction effect.

[0004] The above-mentioned technical solution allows for controllability of the flow rate and extraction height of the extract, thereby improving the accuracy of extraction. However, although the flow rate and height control is achieved through the use of switches, special pipe structures, and scales, the accuracy is still greatly affected by the operator's subjective factors. The quality of the separated liquid after extraction is difficult to control, and the efficiency of the extraction process will be reduced due to the special pipe structure. Summary of the Invention

[0005] The purpose of this invention is to provide a device for preparing a heavy metal scavenging agent, which can accurately separate the extracted liquid and maintain the entire extraction process efficiently and continuously.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a preparation device for a heavy metal scavenger, comprising a mixing tank, an extraction tank, a distillation tank and a controller, wherein the mixing tank is connected to a raw material pipe for conveying the reaction liquid, a circulation pipe for circulating the extractant and a replenishment pipe for replenishing the extractant, and the mixing tank is connected to the extraction tank through a first conveying pipe and a first solenoid valve is connected to the first conveying pipe.

[0007] The extraction tank consists of an extraction pool, a temperature control layer, and the extraction tank body from the inside out. Temperature sensors, pressure sensors, and a pressure relief valve are installed on the side walls of the extraction tank body. The detection ends of the temperature and pressure sensors extend into the extraction pool. A stirring device is installed on the top of the extraction tank body. Two sets of cable retractors are installed on the top of the extraction tank body. Conical detection probes are fixedly connected to the cables of each cable retractor. The two conical detection probes are connected to the same signal processing circuit, which emits light signals and receives the light signals returned by the conical detection probes. A pipe retractor is also installed on the top of the extraction tank body. The two ends of the pipe retractor are connected to an extraction pipe and a water pump, respectively. Initially, the inlet end of the extraction pipe is horizontal to the detection end of the conical detection probe. The water pump is located on the top of the extraction tank body and is connected to the circulation pipe.

[0008] The distillation tank is connected to the extraction tank via a second delivery pipe, which is connected to a second solenoid valve. The distillation tank is also connected to a third delivery pipe, which is connected to a third solenoid valve. The distillation tank is connected to the circulation pipe.

[0009] The controller is used to receive temperature information collected by the temperature sensor and air pressure information collected by the air pressure sensor to control the operation of the stirring device, the first solenoid valve and the pressure relief valve. The controller is also used to receive detection information received by the signal processing circuit and control the operation of the cable reel, the pipe reel and the water pump.

[0010] The technical principle of the above scheme is as follows: During the initial extraction, the reaction solution containing heavy metal scavenging agent from the previous process step is introduced into the mixing tank. At this time, there is no extractant available for recycling back into the mixing tank via the circulation pipe. The extractant is introduced into the mixing tank through the replenishment pipe to mix with the reaction solution, and then introduced into the extraction tank. The extraction is accelerated by stirring with a stirring device, and the temperature in the reaction tank is controlled by a temperature control layer to further accelerate the extraction.

[0011] After extraction, two cable retractors sequentially move the conical detection probe downwards. When the detection end of the conical detection probe is in the air, the light signal does not enter other media, resulting in total internal reflection. Upon contact with the liquid surface, some of the light signal undergoes diffuse reflection, causing a change in the light signal reflected back to the signal processing circuit. When the signal processing circuit receives a change in the light signal returned by one conical detection probe, it suspends that probe, while the other conical detection probe begins to move downwards. If the change in the light signal returned by the other conical detection probe is the same as the change value of the previous probe, it continues to move downwards. This is because the extracted liquid produces... The stratification phenomenon occurs because the upper and lower liquids have different densities. When the conical detection probe comes into contact with the lower liquid, the light signal returned by the probe changes again and is different from the light signal returned by the previous probe, thus suspending the probe. The height difference between the detection ends of the two probes is the height of the upper liquid. The upper liquid is then precisely extracted by moving the extraction tube to the height of the upper liquid using a pipe reel. After the lower liquid (containing the recombination agent) is transported to the distillation tank for purification, it is transported to the next process stage through a third pipe. During the purification process, excess extractant is recycled back into the circulation pipe for reuse in the extraction process.

[0012] The above-mentioned approach has the following beneficial effects.

[0013] 1. In this scheme, premixing is performed before extraction. The mixture is introduced into the mixing tank, flows through the first delivery pipe, and collides with the other reaction liquids in the extraction tank. This allows the reaction liquid and extractant to begin a preliminary reaction during the addition process, which can effectively improve the reaction efficiency. After extraction, the liquid in the extraction tank needs to be separated. Since extraction cannot continue in the extraction tank at this time, extraction preparation can be carried out in advance in the mixing tank. After separation, the liquid in the mixing tank can be introduced into the extraction tank for extraction immediately. Compared with the traditional extraction method, extraction can be carried out continuously and efficiently.

[0014] This scheme uses a conical detection probe to detect the upper and lower layers of the extracted liquid. By utilizing the difference between the light signal reflected back to the signal processing circuit when the light signal is in the medium of air, upper and lower liquid, the surface position of each liquid layer can be effectively obtained, and then the boundary position between each liquid layer can be obtained. Then, the upper liquid is extracted through the extraction tube.

[0015] Compared to existing visual judgment methods, which lack a clear color difference at the interface between the upper and lower liquid layers, this solution can more accurately determine the interface location. This allows for precise extraction of the upper liquid, preventing it from entering the next process step along with the lower liquid containing the re-aggregating agent and affecting the quality of the re-aggregating agent.

[0016] 2. When the density of a material increases, the number of molecular clusters, molecules, and atoms per unit length increases, and the refractive index increases with the increase of density. In this solution, by combining the light intensity reflected back to the signal processing circuit from the conical detection probe, the light intensity reflected back to the signal processing circuit will decrease when the density increases. This allows for a rough determination of the liquid density at which the two conical detection probes are located. Based on the liquid density, it is determined whether the extraction is complete. If the extraction is complete, the upper layer of liquid is extracted and the lower layer of liquid is discharged, thus ensuring the quality of the extraction.

[0017] Furthermore, the top of the mixing tank is provided with a connecting cavity and a mixing cavity. The connecting cavities are symmetrically located on both sides of the mixing cavity and are connected to the mixing cavity. The connecting cavities are connected to the replenishment pipe and the circulation pipe, respectively, and the mixing cavity is connected to the raw material pipe.

[0018] Beneficial effects: By connecting the chamber and the mixing chamber, the reaction liquid, circulating extractant, and replenished extractant added to the mixing tank can collide and mix in the mixing chamber, which will initially mix with the extractant and improve the subsequent extraction efficiency.

[0019] Furthermore, an online flow meter is connected to the circulation tube. The online flow meter is connected to the controller via a signal. The controller receives the flow information collected by the online flow meter and controls the replenishment tube to replenish an appropriate amount of extractant.

[0020] Beneficial effects: Using only the circulating extractant will gradually reduce the subsequent extraction effect. Therefore, it is usually necessary to replenish the extractant to maintain a good extraction effect. The amount of extractant to be replenished is determined by collecting the total amount of circulating extractant by an online flow meter.

[0021] Furthermore, a flow guide hood is provided on the inner side wall of the extraction tank. The flow guide hood has a hollow structure at both ends and does not contact the bottom and top of the extraction tank. The stirring shaft of the stirring device extends into the flow guide hood.

[0022] Beneficial effects: The stirring device generates negative pressure inside the flow guide hood, drawing in liquid through the opening at the lower end of the flow guide hood and discharging it from the upper end of the hood. This causes the liquid to circulate and mix within the extraction tank, accelerating the mixing speed between the reaction liquid and the extractant and improving the extraction efficiency.

[0023] Furthermore, the signal processing circuit includes a transmitting unit for transmitting optical signals, a receiving unit for receiving optical signals, and an optical fiber splitting unit. Both the transmitting unit and the receiving unit are signal-connected to the optical fiber splitting unit, and both the transmitting unit and the receiving unit are signal-connected to the controller. The tapered detection probe is signal-connected to the optical fiber splitting unit. The controller is used to control the operation of the transmitting unit and the receiving unit and to acquire the optical signals received by the receiving unit.

[0024] Beneficial effects: The transmitting and receiving units transmit and receive optical signals. Changes in the optical signals are collected by the receiving unit and sent to the controller, which converts them into control signals to control the operation of various components in the equipment.

[0025] Furthermore, the receiving unit is connected to a prompting module, which is used to acquire signals from the receiving unit and send prompting signals.

[0026] Beneficial effects: When the receiving unit receives a change in the optical signal, it sends a prompt signal through the prompting unit, making it easy for users to intuitively obtain the extraction status.

[0027] Furthermore, the first and second delivery pipes are located at one end inside the extraction tank and are on the same plane as the bottom wall of the extraction tank.

[0028] Beneficial effects: The first delivery pipe can apply an impactor to the reaction liquid at the bottom of the reaction tank during delivery, and the second delivery pipe can discharge the lower layer of liquid from the extraction tank more thoroughly.

[0029] Furthermore, several grooves are provided on the top of the extraction tank body, and the conical detection probe and extraction tube are located in the grooves.

[0030] Beneficial effect: The conical detection probe and extraction tube are housed in the groove, avoiding any impact on the reaction solution.

[0031] Furthermore, a weighted ring is fitted at one end of the extraction tube located inside the extraction tank.

[0032] Beneficial effect: By adding weight to the extraction tube through the weight ring, the extraction tube can be vertically and stably submerged into the reaction solution for liquid extraction.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of an embodiment of the heavy metal catching agent preparation equipment of the present invention;

[0035] Figure 2 A schematic diagram of a conical detection probe from an embodiment of the heavy metal catching agent preparation equipment of the present invention;

[0036] Figure 3 This is a circuit diagram of an embodiment of the equipment for preparing the heavy metal scavenger of the present invention;

[0037] Figure 4 This is a schematic diagram of the signal processing circuit of an embodiment of the heavy metal scavenging agent preparation equipment of the present invention. Detailed Implementation

[0038] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0041] The following detailed description illustrates the specific implementation method:

[0042] The reference numerals in the accompanying drawings include: 1. Raw material pipe; 2. Supplement pipe; 3. Connecting cavity; 4. Mixing cavity; 5. Mixing tank; 6. Support frame; 7. First solenoid valve; 8. First delivery pipe; 9. Extraction tank body; 10. Temperature control layer; 11. Extraction pool; 12. Circulation pipe; 13. Temperature sensor; 14. Pressure sensor; 15. Cable retractor; 16. Conical detection probe; 17. Stirring device; 18. Online flow meter; 19. Water pump; 20. Pipe retractor; 21. Weight ring; 22. Vent valve; 23. Second solenoid valve; 24. Second delivery pipe; 25. Third solenoid valve; 26. Distillation tank; 27.

[0043] Example 1: As shown in the attached document Figure 1As shown: A heavy metal scavenging agent preparation device includes a mixing tank 5, an extraction tank, a distillation tank 27, and a controller. The mixing tank 5, the extraction tank, and the distillation tank 27 are all cylindrical structures and are all located on a support frame 6. The mixing tank 5 is connected to a raw material pipe 1 for conveying the reaction liquid, a circulation pipe 12 for circulating the extractant, and a replenishment pipe 2 for replenishing the extractant. The raw material pipe 1 is usually connected to the reaction tank of the previous process (the reaction tank for filtration and washing). The mixing tank 5 is connected to the extraction tank through a first conveying pipe 8, and a first solenoid valve 7 is connected to the first conveying pipe 8. The first pipe is connected to the bottom of the mixing tank 5 and the extraction tank, and the pipe body is located inside the support frame 6. The distillation tank 27 adopts the prior art.

[0044] The extraction tank consists of an extraction pool 11, a temperature control layer 10, and an extraction tank body 9 from the inside out. Sufficient space is reserved at the top of the extraction tank for equipment installation. The temperature control layer 10 uses ordinary electric heating equipment. A temperature sensor 13, a pressure sensor, and a pressure relief valve are fixedly connected to the side wall of the extraction tank body 9. The detection ends of the temperature sensor 13 and the pressure sensor extend into the extraction pool 11. A stirring device 17 is installed on the top of the extraction tank body 9. The stirring device 17 consists of a motor and a stirring shaft. The motor is fixed to the top of the extraction tank body 9 by bolts, and the stirring shaft extends into the extraction pool 11.

[0045] Two sets of cable retractors 15 are fixedly connected to the top of the extraction tank body 9. In this embodiment, the cable retractor 15 is a signal cable retractor, model: CH-K203. This cable retractor 15 can remotely control the extension and retraction of the cable. A conical detection probe 16 is fixedly connected to the cable of each cable retractor 15. Figure 2 As shown, the upper end of the conical detection probe 16 is cylindrical, and the lower end is conical. When air is the medium, the light signal undergoes total internal reflection in the conical region. The two conical detection probes 16 are connected to the same signal processing circuit. The signal processing circuit emits light signals and receives the light signals returned by the conical detection probes 16. A pipe rewinder 20 is also fixedly connected to the top of the extraction tank body 9. In this embodiment, the pipe rewinder 20 is model CH-C6001, and its pipe length is customized to be 3m. The two ends of the pipe rewinder 20 are respectively connected to the extraction pipe and the water pump 19. In the initial state, the inlet end of the extraction pipe is horizontal with the detection end of the conical detection probe 16. The water pump 19 is fixedly connected to the top of the extraction tank body 9 by bolts and is connected to the circulation pipe 12.

[0046] The distillation tank 27 is connected to the extraction tank through the second delivery pipe. The second delivery pipe is connected to the second solenoid valve 23. The distillation tank 27 is also connected to the third delivery pipe 26. The third delivery pipe 26 is connected to the third solenoid valve 25. The distillation tank 27 is connected to the circulation pipe 12. The pipe bodies of the second delivery pipe and the third delivery pipe 26 are both located inside the support frame 6.

[0047] In this embodiment, the controller uses a single-chip microcomputer, model STC90C51RC. The controller is used to receive temperature information collected by temperature sensor 13 and air pressure information collected by air pressure sensor to control the operation of stirring device 17, first solenoid valve 7 and pressure relief valve. The controller is also used to receive detection information received by signal processing circuit and control the operation of cable reel 15, pipe reel 20 and water pump 19.

[0048] The specific implementation process is as follows: During the initial extraction, the reaction liquid containing heavy metal scavenging agent from the previous process step is introduced into the mixing tank 5 through the raw material pipe 1. The extractant is introduced into the mixing tank 5 through the replenishment pipe 2 to mix with the reaction liquid. The controller controls the first solenoid valve 7 to open and introduce the reaction liquid initially mixed with the extractant into the extraction tank 11 through the first delivery pipe 8. The mixture is stirred by the stirring device 17 for extraction. At the same time, the controller, combined with the pressure and temperature information collected by the pressure sensor and temperature sensor 13, controls the temperature and pressure in the reaction tank through the temperature control layer 10 and the pressure relief valve to accelerate the extraction.

[0049] After extraction, the two cable retractors 15 start operating sequentially, causing the conical detection probe 16 to move downwards. When the detection end of the conical detection probe 16 is in the air, the light signal does not enter other media, so total internal reflection occurs. When it comes into contact with the liquid surface, some of the light signal undergoes diffuse reflection, causing the light signal reflected back to the signal processing circuit to change. When the signal processing circuit receives a change in the light signal returned by one conical detection probe 16, it suspends the conical detection probe 16, and the other conical detection probe 16 begins to move downwards. When the light signal returned by the conical detection probe 16 changes, if it is the same as the change value of the previous conical detection probe 16, it continues to move downwards. Due to the stratification of the extracted liquid, the upper and lower layers of liquid have different densities. When the conical detection probe 16 comes into contact with the lower layer of liquid, the light signal returned by the conical detection probe 16 will change again and will be different from the light signal returned by the previous conical detection probe 16, thus suspending the conical detection probe 16. The height difference between the detection ends of the two conical detection probes 16 is the height of the upper layer of liquid.

[0050] Subsequently, the extraction tube is moved to the height of the upper liquid by the operation of the pipe reel so that one end of the extraction tube is located at the junction of the upper and lower liquids. This allows the upper liquid to be accurately extracted for recycling and extraction. After the lower liquid (containing the recombination agent) is transported to the distillation tank 27 for purification, it is transported to the next process stage through the third pipe. During the purification process, the excess extractant is recycled back into the circulation pipe 12 for recycling and extraction.

[0051] Example 2: As shown in the attached document Figure 1As shown: Compared with Embodiment 1, the difference is that the top of the mixing tank 5 is provided with a connecting cavity 3 and a mixing cavity 4. The connecting cavities 3 are symmetrically opened on both sides of the mixing cavity 4, and both connecting cavities 3 are connected to the mixing cavity 4. The connecting cavities 3 are respectively connected to the replenishment pipe 2 and the circulation pipe 12, and the mixing cavity 4 is connected to the raw material pipe 1.

[0052] The specific implementation process is as follows: The reaction liquid is introduced into the mixing chamber 4 through the raw material pipe 1. The circulating extractant and the supplementary extractant are introduced into the mixing chamber 4 through the connecting chamber 3. The reaction liquid, the circulating extractant and the supplementary extractant added into the mixing tank 5 can collide and mix in the mixing chamber 4, which will initially mix with the extractant and improve the subsequent extraction efficiency.

[0053] Example 3: As shown in the attached document Figure 1 As shown: Compared with Embodiment 2, the difference is that an online flow meter 18 is connected to the circulation pipe 12. The online flow meter 18 is connected to the controller signal. The controller receives the flow information collected by the online flow meter 18 and controls the supplementary pipe 2 to supplement an appropriate amount of extractant.

[0054] The specific implementation process is as follows: The online flow meter 18 counts the total amount of extractant flowing through the circulation pipe 12, that is, the total amount of extractant circulating back to the mixing tank 5. When the circulating extractant is insufficient to effectively extract the reaction liquid in the reaction tank, the extractant is added to the mixing tank 5 through the replenishment pipe 2 to ensure that the reaction liquid in the reaction tank can be effectively extracted.

[0055] Example 4: As attached Figure 1 As shown: Compared with Example 3, the difference is that a flow guide is fixedly connected to the inner wall of the extraction tank 11. The flow guide is a hollow structure at both ends. The flow guide does not contact the bottom and top of the extraction tank 11 and maintains a distance of 20cm from the bottom of the extraction tank 11. The stirring shaft of the stirring device 17 extends into the flow guide, and preferably the stirring blades on the stirring shaft are close to the bottom opening of the flow guide.

[0056] The specific implementation process is as follows: The stirring device 17 generates negative pressure inside the guide hood. The opening at the lower end of the guide hood draws in liquid and discharges it from the upper end of the guide hood, so that the liquid forms an up-and-down circulation mixing in the extraction tank 11, which accelerates the mixing speed of the reaction liquid and the extractant and improves the extraction efficiency.

[0057] Example 5: As shown in the appendix Figure 1As shown: Compared with Embodiment 4, the difference is that the signal processing circuit includes a transmitting unit for transmitting optical signals, a receiving unit for receiving optical signals, and an optical fiber splitting unit. The transmitting unit and the receiving unit are both signal-connected to the optical fiber splitting unit, and the transmitting unit and the receiving unit are both signal-connected to the controller. The tapered detection probe 16 is signal-connected to the optical fiber splitting unit. The controller is used to control the operation of the transmitting unit and the receiving unit and to acquire the optical signals received by the receiving unit.

[0058] The specific implementation process is as follows: The transmitting unit emits an optical signal, which is reflected at the detection end of the conical detection unit. Part of the optical signal is then returned to the receiving unit through the optical fiber splitting unit. The receiving unit converts the optical signal into an electrical signal based on the intensity of the optical signal. The controller converts the electrical signal into a control signal to control the operation of the cable rewinder 15 and the pipe rewinder 20.

[0059] Example 6: As attached Figure 1 As shown: Compared with Embodiment 5, the difference is that the receiving unit is connected to a prompting module. The prompting module is used to acquire the signal of the receiving unit and send a prompting signal. In this embodiment, the prompting module is an indicator light.

[0060] The specific implementation process is as follows: When the intensity of the light signal received by the receiving unit changes, it sends an electrical signal to the indicator light, and the user judges the extraction status based on the indicator light.

[0061] Example 7: As attached Figure 1 As shown: Compared with Embodiment 6, the difference is that the first delivery pipe 8 and the second delivery pipe are located in the extraction tank 11, and one end of the second delivery pipe is on the same plane as the bottom wall of the extraction tank 11.

[0062] The specific implementation process is as follows: the first conveying pipe 8 can apply an impactor to the reaction liquid at the bottom of the reaction tank when conveying the reaction liquid, and the second conveying pipe can discharge the lower layer liquid of the extraction tank 11 more thoroughly.

[0063] Example 8: As attached Figure 1 As shown: Compared with Example 7, the difference is that the top of the extraction tank body 9 is provided with several grooves, and the conical detection probe 16 and the extraction tube are located in the grooves.

[0064] The specific implementation process is as follows: The groove houses the conical detection probe 16 and the extraction tube, avoiding any impact on the reaction solution.

[0065] Example 9: As attached Figure 1 As shown: Compared with Example 8, the difference is that a weighted ring 21 is fitted at one end of the extraction tube inside the extraction tank body 9.

[0066] The specific implementation process is as follows: The weight ring 21 adds weight to the extraction tube, enabling the extraction tube to descend vertically and stably into the reaction liquid for liquid extraction.

[0067] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific structures and / or characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A device for preparing a heavy metal scavenging agent, characterized in that: It includes a mixing tank, an extraction tank, a distillation tank, and a controller. The mixing tank is connected to a raw material pipe for conveying the reaction liquid, a circulation pipe for circulating the extractant, and a replenishment pipe for replenishing the extractant. The mixing tank is connected to the extraction tank through a first delivery pipe, and a first solenoid valve is connected to the first delivery pipe. The extraction tank consists of an extraction pool, a temperature control layer, and the extraction tank body from the inside out. Temperature sensors, pressure sensors, and a pressure relief valve are installed on the side walls of the extraction tank body. The detection ends of the temperature and pressure sensors extend into the extraction pool. A stirring device is installed on the top of the extraction tank body. Two sets of cable retractors are installed on the top of the extraction tank body. Conical detection probes are fixedly connected to the cables of each cable retractor. The two conical detection probes are connected to the same signal processing circuit, which emits light signals and receives the light signals returned by the conical detection probes. A pipe retractor is also installed on the top of the extraction tank body. The two ends of the pipe retractor are connected to an extraction pipe and a water pump, respectively. Initially, the inlet end of the extraction pipe is horizontal to the detection end of the conical detection probe. The water pump is located on the top of the extraction tank body and is connected to the circulation pipe. The distillation tank is connected to the extraction tank via a second delivery pipe, which is connected to a second solenoid valve. The distillation tank is also connected to a third delivery pipe, which is connected to a third solenoid valve. The distillation tank is connected to the circulation pipe. The controller is used to receive temperature information collected by the temperature sensor and air pressure information collected by the air pressure sensor to control the operation of the stirring device, the first solenoid valve and the pressure relief valve. The controller is also used to receive detection information received by the signal processing circuit and control the operation of the cable reel, the pipe reel and the water pump. The signal processing circuit includes a transmitting unit for transmitting optical signals, a receiving unit for receiving optical signals, and an optical fiber splitting unit. The transmitting unit and the receiving unit are both signal-connected to the optical fiber splitting unit and to the controller. The tapered detection probe is signal-connected to the optical fiber splitting unit. The controller is used to control the operation of the transmitting unit and the receiving unit and to acquire the optical signals received by the receiving unit. After extraction, two cable retractors sequentially move the conical detection probes downwards. When the signal processing circuit receives a change in the light signal returned by one conical detection probe, it suspends the probe, and the other probe begins to move downwards. When the light signal returned by the other probe changes, if it matches the change value of the previous probe, it continues to move downwards. If the light signal returned by the other probe changes again and differs from the previous probe, it suspends the probe. The height difference between the detection ends of the two conical probes is the height of the upper liquid. The pipe retractor moves the extraction tube to the height of the upper liquid, positioning one end of the extraction tube at the interface between the upper and lower liquids, thus extracting the upper liquid for recycling extraction. The lower liquid is then transported to a distillation tank for purification and then transported to the next process stage via a third pipe. Excess extractant is recycled back into the circulation pipe for reuse in recycling extraction.

2. The equipment for preparing the heavy metal scavenger according to claim 1, characterized in that: The top of the mixing tank has a connecting cavity and a mixing cavity. The connecting cavities are symmetrically located on both sides of the mixing cavity and are connected to the mixing cavity. The connecting cavities are connected to the replenishment pipe and the circulation pipe, respectively, and the mixing cavity is connected to the raw material pipe.

3. The equipment for preparing the heavy metal scavenger according to claim 2, characterized in that: An online flow meter is connected to the circulation tube. The online flow meter is connected to the controller via a signal. The controller receives the flow information collected by the online flow meter and controls the replenishment tube to replenish an appropriate amount of extractant.

4. The equipment for preparing the heavy metal scavenger according to claim 3, characterized in that: The inner wall of the extraction tank is equipped with a flow guide hood, which is a hollow structure at both ends. The flow guide hood does not contact the bottom and top of the extraction tank, and the stirring shaft of the stirring device extends into the flow guide hood.

5. The equipment for preparing the heavy metal scavenger according to claim 4, characterized in that: The receiving unit is connected to a prompting module, which is used to acquire signals from the receiving unit and send prompt signals.

6. The equipment for preparing the heavy metal scavenger according to claim 5, characterized in that: The first and second delivery pipes are located at one end inside the extraction tank and are on the same plane as the bottom wall of the extraction tank.

7. The equipment for preparing the heavy metal scavenger according to claim 6, characterized in that: The top of the extraction vessel body has several grooves, and the conical detection probe and extraction tube are located in the grooves.

8. The equipment for preparing the heavy metal scavenger according to claim 7, characterized in that: The extraction tube is located inside the extraction tank and is fitted with a weighted ring at one end.

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