A performance evaluation system for heavy metal ion capturing agent in water

Abstract

The utility model discloses a kind of performance evaluation system of heavy metal ion trapping agent in water, including water distribution unit, reactor, detection unit and control unit.Water distribution unit includes raw water tank, heavy metal mother liquor tank, pH value adjusting tank and mixing tank;Stirring device is arranged in mixing tank.The inlet of reactor is connected with the outlet of mixing tank of water distribution unit and trapping agent tank respectively, and temperature controller and stirring device are equipped in the reactor.Detection unit includes two heavy metal detectors respectively arranged in mixing tank and reactor, two pH value determinators respectively arranged in mixing tank and reactor, thermometer arranged in reactor, laser particle size instrument and turbidimeter;Two heavy metal detectors.Control unit includes controller and man-machine interface connected with stirring device, temperature controller, heavy metal detector, pH value determinator, thermometer, laser particle size instrument and turbidimeter.The utility model can efficiently and accurately evaluate the multidimensional performance of trapping agent.

Description

Technical Field

[0001] This utility model relates to a performance evaluation system for a water heavy metal ion trapping agent. Background Technology

[0002] Heavy metals pose a threat to the ecological environment and human health. Heavy metal pollution is one of the most significant environmental problems, especially in industrial wastewater, electronic waste treatment, and mining wastewater. Traditional water treatment technologies, such as chemical precipitation, ion exchange, and membrane separation, while effective, suffer from secondary pollution, high costs, and poor selectivity. In recent years, low-cost, efficient, and environmentally friendly heavy metal trapping agents have been widely used. However, there are many types of heavy metal trapping agents on the market, such as dithiocarbamates (DTC) and trithiotriazine trisodium salts (TMT). Compared to traditional treatment methods such as calcium hydroxide and sodium sulfide, heavy metal trapping agents have significant advantages, but they also have some drawbacks, such as fine floc particles, slow settling speed, and varying treatment effects under different pH conditions. As the types of heavy metal traps gradually increase, most of them are DTC and TMT derivatives with different molecular structures and production processes, resulting in certain differences in their ability to treat heavy metals. Currently, there is a lack of systematic performance evaluation of heavy metal traps, and some current evaluation tests are based on single conditions, with few comprehensive considerations, and lack a comprehensive performance assessment of metal traps under dynamic conditions. Therefore, the evaluation of heavy metal traps is not comprehensive and systematic enough. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a performance evaluation system for heavy metal ion trapping agents in water, which can efficiently and accurately evaluate the multi-dimensional performance of heavy metal trapping agents.

[0004] The purpose of this invention is achieved as follows: a performance evaluation system for heavy metal ion trapping agents in water, comprising a water distribution unit, a reactor, a detection unit, and a control unit; wherein,

[0005] The water distribution unit includes a raw water tank, a heavy metal mother liquor tank, a pH adjustment tank, and a mixing tank; the outlets of the raw water tank, the heavy metal mother liquor tank, and the pH adjustment tank are all connected to the inlet of the mixing tank; a stirring device is installed inside the mixing tank.

[0006] The inlet of the reactor is connected to the outlet of the mixing tank of the water distribution unit and the outlet of the trapping agent tank, respectively. The reactor is equipped with a temperature controller and a stirring device.

[0007] The detection unit includes two heavy metal detectors, two pH meters, a thermometer, a laser particle size analyzer, and a turbidimeter; the two heavy metal detectors are installed one-to-one in the mixing tank and the reactor; the two pH meters are installed one-to-one in the mixing tank and the reactor; the thermometer, the laser particle size analyzer, and the turbidimeter are all installed in the reactor;

[0008] The control unit includes a controller and a human-machine interface; the controller is connected to the heavy metal detector, two pH meters, a thermometer, a laser particle size analyzer, and a turbidimeter via signal lines; the controller is also connected to the stirring device and temperature controller inside the reactor via signal lines.

[0009] The above-mentioned performance evaluation system for heavy metal ion trapping agents in water includes a reactor divided into multiple test chambers by partitions. Each test chamber is equipped with a temperature controller, a stirring device, a heavy metal detector, a pH meter, a thermometer, a laser particle size analyzer, and a turbidity meter that are connected to the controller.

[0010] The performance evaluation system for heavy metal ion trapping agents in water of this invention is characterized by:

[0011] 1. It can simulate different wastewater conditions, including multi-ion coexistence wastewater and actual water treatment conditions, to test the chelating ability, selectivity, stability, flocculation and sedimentation effects of heavy metal chelators, and record key data simultaneously.

[0012] 2. Modular design facilitates maintenance and upgrades, allows for the addition of more testing conditions, enables multi-condition testing of heavy metal trap performance, and systematic evaluation of heavy metal trap performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the performance evaluation system for the heavy metal ion capture agent in water according to this utility model.

[0014] Figure 2 This is a detailed structural diagram of the performance evaluation system for the water heavy metal ion capture agent of this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Please see Figure 1 and Figure 2 The performance evaluation system for heavy metal ion capture agents in water of this invention includes a water distribution unit 1, a reactor 2, a detection unit 3, and a control unit 4.

[0017] The water distribution unit 1 includes a raw water tank 11, a heavy metal mother liquor tank 12, a pH adjustment tank 13, and a mixing tank 10. The raw water tank 11 stores deionized water or actual water; the heavy metal mother liquor tank 12 stores heavy metal standard solutions; the pH adjustment tank 13 stores pH adjustment solutions; the outlets of the raw water tank 11, the heavy metal mother liquor tank 12, and the pH adjustment tank 13 are all connected to the inlet of the mixing tank 10; a stirring device 20 is installed inside the mixing tank 10. The mixing tank 10 is used to prepare wastewater containing different concentrations of coexisting metal ions.

[0018] The inlet of reactor 2 is connected to the outlet of mixing tank 10 of water distribution unit 1 and the outlet of trapping agent tank 5 respectively. The reactor 2 is equipped with a temperature controller and a stirring device 20. The stirring speed of the stirring device 20 is 0 to 1000 rpm. The temperature controller can control the temperature of reactor 2 between 10℃ and 50℃.

[0019] The detection unit 3 includes two online heavy metal detectors 31, two pH meters 32, a thermometer 33, a laser particle size analyzer 34, and a turbidimeter 25. The two heavy metal detectors 31 are installed in the mixing tank 10 and the reactor 2 respectively. The two pH meters 32 are installed in the mixing tank 10 and the reactor 2 respectively. The thermometer 33, the laser particle size analyzer 34, and the turbidimeter 35 are all installed in the reactor 2.

[0020] The control unit 4 includes a controller 4A and a human-machine interface 4B. The controller 4A is connected via signal lines to two heavy metal detectors 31, two pH meters 32, a thermometer 33, a laser particle size analyzer 34, and a turbidimeter 35. The controller 4A is also connected via signal lines to the stirring device 20 and the temperature controller inside the reactor 2. The human-machine interface 4B allows for setting experimental conditions, storing experimental parameters, and generating experimental reports. Experimental conditions include the pH value in the pH adjustment chamber 13, the stirring speed of the stirring device 20, the temperature of the reactor 2, and the reaction time.

[0021] The reactor 2 can be divided into several test chambers by partitions. Each test chamber is equipped with a temperature controller, a stirring device 20, a heavy metal detector 31, a pH meter 32, a thermometer 33, a laser particle size analyzer 34, and a turbidity meter 35, all of which are connected to the controller 4A signal. This allows the experiments to be conducted simultaneously in the test chambers.

[0022] The performance evaluation system for the water heavy metal ion scavenger of this utility model operates according to the following process:

[0023] The process involves: preparing wastewater → adding a heavy metal chelating agent and reacting → testing the wastewater parameters before and after the reaction → recording parameter changes → evaluating the performance of the heavy metal chelating agent. The details are as follows:

[0024] Step 1: Collect actual wastewater and add it to the heavy metal mother liquor tank 12, or add deionized water from the raw water tank 11 to the heavy metal mother liquor tank 12 according to the actual physicochemical parameters of the wastewater, and prepare simulated wastewater through the heavy metal mother liquor tank 12 and the pH adjustment tank 13.

[0025] If actual or simulated wastewater needs to be prepared to achieve a specific target heavy metal concentration and pH value, the corresponding concentration needs to be input through the human-machine interface 4B. The controller 4A then delivers the appropriate amounts of pure water, pH adjusting solution, and heavy metal standard solution to the mixing tank 10. The mixing is then thoroughly mixed by the stirring device 20 within the mixing tank 10. The heavy metal concentration is monitored in real-time by a heavy metal detector 31 installed within the mixing tank 10. The pH value is measured by a pH meter 32 installed within the mixing tank 10, and the pH range is generally 1-13.

[0026] Step 2: Add a heavy metal scavenger to the wastewater to initiate a reaction.

[0027] After the wastewater is prepared, it is pumped into reactor 2. By setting different conditions such as temperature, stirring speed, reaction time, amount of precipitant added, and settling time on the human-machine interface 4B, parallel comparative experiments can be carried out simultaneously in each test chamber of the reactor.

[0028] The stirring speed of the stirring device 20 installed in the reactor 2 is adjustable from 0 to 1000 rpm, and the temperature can be set from 10℃ to 50℃, which is monitored by thermometer 33; the flocculation and sedimentation effects are tested by laser particle size analyzer 34 and turbidity meter 35.

[0029] Step 3: Test the indicators of the wastewater after the reaction;

[0030] After the set reaction conditions are met, the removal efficiency of heavy metals before and after the reaction is detected by pH meter 32, laser particle size analyzer 34, and heavy metal detector 31 installed in reactor 2.

[0031] Record reaction time: to evaluate the chelating ability of heavy metal traps for heavy metals;

[0032] Effects of different temperatures on heavy metal removal: Evaluating the stability of heavy metal traps at different temperatures;

[0033] Flocculation of the precipitate after reaction: flocculation and precipitation effect, the size of the precipitate affects the precipitation rate;

[0034] Removal of different types of heavy metals: Selectivity of heavy metal trapping agents for different heavy metals;

[0035] Assessment: Summarize the data and conduct a comprehensive assessment.

[0036] The above embodiments are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention and should be defined by the claims.

Claims

1. A performance evaluation system for a heavy metal ion trapping agent in water, comprising a water distribution unit, a reactor, a detection unit, and a control unit; characterized in that, The water distribution unit includes a raw water tank, a heavy metal mother liquor tank, a pH adjustment tank, and a mixing tank; the outlets of the raw water tank, the heavy metal mother liquor tank, and the pH adjustment tank are all connected to the inlet of the mixing tank; a stirring device is installed inside the mixing tank. The inlet of the reactor is connected to the outlet of the mixing tank of the water distribution unit and the outlet of the trapping agent tank, respectively. The reactor is equipped with a temperature controller and a stirring device. The detection unit includes two heavy metal detectors, two pH meters, a thermometer, a laser particle size analyzer, and a turbidimeter; the two heavy metal detectors are installed one-to-one in the mixing tank and the reactor; the two pH meters are installed one-to-one in the mixing tank and the reactor; the thermometer, the laser particle size analyzer, and the turbidimeter are all installed in the reactor; The control unit includes a controller and a human-machine interface; the controller is connected to the heavy metal detector, two pH meters, a thermometer, a laser particle size analyzer, and a turbidimeter via signal lines; the controller is also connected to the stirring device and temperature controller inside the reactor via signal lines.

2. The performance evaluation system for water heavy metal ion scavengers according to claim 1, characterized in that, The reactor is divided into multiple test chambers by partitions. Each test chamber is equipped with a temperature controller, a stirring device, a heavy metal detector, a pH meter, a thermometer, a laser particle size analyzer, and a turbidity meter, all of which are connected to the controller.

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