CN206604393U - A kind of continuous water dispensing apparatus for column experiments - Google Patents

Abstract

The utility model discloses a continuous water distribution device used for column experiments, which belongs to the technical field of water treatment. It includes a water inlet pipeline system, a concentrated solution injection pipeline system and a mixing tube, the outlet of the mixing tube is connected to the inlet of the experimental column, and the inlet of the mixing tube is connected to the outlet of the water inlet pipeline system and the outlet of the concentrated solution injection pipeline system; The water inlet pipeline system includes a water inlet pipe and a flowmeter, and the flowmeter is arranged on the water inlet pipe; the concentrated solution injection pipeline system includes a concentrated solution injection pipe, a syringe and a syringe pump, and the outlet of the syringe is connected to the The inlet of the concentrate injection pipe is communicated, and the syringe is installed in the syringe pump. The utility model solves the problem that the specified pollutant concentration diluent cannot be continuously prepared during the column experiment, and is suitable for column experiments, water purifiers and permeability reaction wall experiments, etc., and has the advantages of high automation, stable flow rate, adjustable concentration, and low cost. Advantages of low cost and easy operation.

Description

A continuous water distribution device for column experiments

technical field

The utility model relates to a continuous water distribution device used for column experiments, which belongs to the technical field of water treatment.

Background technique

Pollutant removal behavior and performance evaluation process are the core issues in the research of water treatment technology in the field of environmental engineering. In the experimental research of pollutant removal and degradation, the two most commonly used methods are static experiment and dynamic experiment: static experiment is a common batch test, adding the test solution containing the target pollutant and the decontamination material in a specific reaction vessel , react under certain conditions of shaking, temperature, and air pressure, and analyze and evaluate by taking samples at different times after the reaction; dynamic experiment is a column experiment of continuous water inflow, usually the decontamination material is filled in the experimental column, and then the containing The test solution of pollutants is injected into the experimental column, and samples are taken at the outlet of the column for analysis and evaluation. Compared with static experiments, dynamic column experiments have higher scientific research value and engineering practice significance. Depending on the filler and design conditions, the packed column can simulate the hydrological conditions in the soil or groundwater and the migration and transformation laws of the target pollutants in the laboratory, especially the long-term evolution of the permeable reactive wall (PRB). It cannot be achieved by static experiments. In addition, compared with the static implementation, the dynamic column experiment also has more significant advantages in terms of equipment footprint, operation and maintenance, and system stability.

The water distribution device for column experiments in the laboratory is usually a 5-50L glass tank, which contains a solution prepared with pure water, and then continuously supplies the solution to the experimental column through a siphon or other means. Therefore, when the volume of the experimental column bed is large, the flow rate is large, or the experimental investigation period is long, the water distribution device has the following problems: (1) Due to the limited amount of solution contained in the glass tank, it cannot meet the experimental requirements, so it must be manually Prepare the solution once and periodically add it to the glass tank. Therefore, the automation of the glass tank supply is low, the continuity is poor, the operation is cumbersome, and the workload is obviously increased; (2) the concentration of the solution prepared each time Because there are errors and inconsistencies, the concentration of the liquid supply is unstable, which seriously affects the accuracy of the experimental results; (3) the solution in the glass jar drops as the column experiment progresses, and the flow rate of the liquid supply from the glass jar to the experimental column (4) The time of filling the supplementary solution in the glass tank is easy to conflict with the normal work and rest time of the experimenter, causing inconvenience. However, the current commercially available high-precision microdiluters and industrial on-line dilution devices are so expensive that ordinary laboratories cannot afford them, and their working dilution capacity is not suitable for column experiments on a typical laboratory scale.

China Utility Model, Publication No.: 203461868U, Publication Date: March 5, 2014, discloses an indoor experimental system for simulating a permeable reaction wall, including sequentially connected liquid supply bags, water inlet pipes with flow control, Experimental column device, waste liquid collection bucket, and adsorption bag for simulating the permeable reaction wall. The composition of the experimental column device includes: a permeable reaction column, a sandy gravel cushion, a sandy gravel protective layer, and a columnar shell. The sand and gravel cushion, the permeable reaction column, and the sand and gravel protective layer are arranged in the cylindrical shell from bottom to top. The bottom of the cylindrical shell is provided with a water inlet, the top is provided with a water outlet, and the side wall is provided with a sampling port. There is a sampling plug connected to the port. The device measures the dechlorination effect of the permeable reaction wall on 1,2-dichlorobenzene in groundwater by sampling, and simultaneously tests the penetration time of the permeable reaction wall. Its disadvantages are: (1) The capacity of the liquid supply bag is limited and needs to be replaced periodically, thus increasing the workload of the experimenters; (2) The concentration of the solution in the liquid supply bag is fixed and cannot be dynamically adjusted according to the needs of the experiment. Therefore, the applicability of the liquid supply bag is poor; (3) The pressure and flow rate of the liquid supply bag will change with the change of the remaining solution in the liquid supply bag, so it is difficult to guarantee the stability of the experimental conditions.

Contents of the invention

1. Problems to be solved

Aiming at the problem of continuous and stable liquid inflow during the column experiment, the utility model provides a continuous water distribution device for the column experiment. It can automatically and continuously prepare the solution with the required pollutant concentration for the column experiment and achieve stable delivery.

2. Technical solution

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

A continuous water distribution device for column experiments, comprising a water inlet pipeline system, a concentrated liquid injection pipeline system and a mixing tube; the water inlet pipeline system includes a water inlet pipe and a flowmeter, and the flowmeter is arranged on the water inlet pipe Above; the concentrate injection pipeline system includes a concentrate injection pipe and an injection system, the outlet of the injection system communicates with the inlet of the concentrate injection pipe, the inlet of the mixing pipe connects with the outlet of the water inlet pipe and the outlet of the concentrate injection pipe The outlets are all connected, and the outlet of the mixing tube is connected with the inlet of the experimental column. During the operation of the device, the water inlet pipe is directly connected to the tap, laboratory deionized water faucet or pure water machine. The concentrated solution to be diluted is stored in the injection system, and the injection system injects the concentrated solution to be diluted into the concentrated solution injection pipe at a constant flow rate. The feed water and the concentrated solution to be diluted are collected and mixed in the mixing tube, thereby realizing the function of on-line dilution and distribution of water, preparing on-line feed water containing a specified concentration of pollutants, and providing stable and continuous distribution of water to the experimental column to simulate long-term operation of the water purifier to remove water Trace Pollutant Performance.

Further, the injection system includes a syringe pump and a syringe, and the syringe pump includes a control system, a ring edge fixing groove and a push head fixing groove, the tube body of the syringe is installed in the ring edge fixing groove, the The push head of the syringe is installed in the push head fixing groove, the outlet of the syringe communicates with the inlet of the concentrated solution injection pipe, and the push head fixing groove is connected with the control system. According to the needs of the column experiment, set the control parameters of the syringe pump control system and adjust the influent flow through the flowmeter regulating valve. The control system controls the push head fixing groove to push the push head of the syringe at a constant speed, so that the concentrate to be diluted in the syringe Inject the concentrated liquid into the injection pipe at a constant flow rate, and collect and mix with the incoming water at a certain ratio.

Further, the inlet of the concentrated solution injection tube is provided with a finger-tight joint, and the outlet of the syringe is provided with a Luer joint, and the hand-tight joint matches the Luer joint, and the connection between the hand-tight joint and the Luer joint is more convenient. Tight, thereby effectively preventing the concentrated solution to be diluted from leaking at the interface between the syringe and the concentrated solution injection tube.

Further, the flow meter includes a water inlet, a water outlet, a conical tube, a float and a flow regulating valve, the conical tube communicates with the water inlet and the water outlet, the float is arranged in the conical tube, The conical tube is provided with a range scale, the flow regulating valve is installed on the water inlet, the flow regulating valve of the flow meter regulates the flow of water entering, and the injection pump control system regulates the flow of the concentrate to be diluted. The diluent flow ratio adjusts the dilution factor of the online dilution distribution water.

Further, a sampling tube is also included, the sampling tube communicates with the mixing tube, and a valve is arranged on the sampling tube. The sampling pipeline is used for random sampling analysis during the operation of the experimental device to ensure that the dilution concentration of the water that finally enters the experimental column meets the experimental requirements.

Further, an L-shaped two-way quick-plug joint is provided between the flow meter and the water inlet pipe, and the L-shaped two-way quick-plug joint can adjust the direction of the pipeline according to space requirements, thereby saving the space occupied by the water distribution device.

Further, it includes a T-shaped three-way quick joint, the concentrated liquid injection pipe, the water inlet pipe and the mixing pipe are respectively communicated with the three interfaces of the T-shaped three-way quick joint, and the concentrated liquid injection pipe It is perpendicular to the water inlet pipe and the mixing pipe, and the inner diameter of the outlet of the concentrated liquid injection pipe is not greater than 1/8 of the inner diameter of the T-shaped quick joint interface, effectively preventing the concentrated liquid injection pipe, the water inlet pipe and the mixing The confluent connections of the tubes produce a washout dilution effect.

Further, a silicone tube is connected between the concentrated liquid injection pipe and the T-shaped tee quick joint interface, and the silicone tube has excellent corrosion resistance and oxidation resistance.

Further, the concentrated solution injection tube is a PEEK tube, which is strong, high-pressure resistant, and has a long service life, and the inner diameter of the PEEK tube is small, which effectively prevents the effect of scouring and dilution.

3. Beneficial effects

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

(1) In the continuous water distribution device for column experiments provided by the utility model, the concentrated solution to be diluted is stored in the injection system, and the injection system injects the concentrated solution to be diluted into the concentrated solution injection pipe at a constant flow rate, and the flow meter adjusts the water flow rate And keep the influent flow constant, the concentrated solution to be diluted and the influent are mixed in a constant ratio in the mixing tube to prepare a solution containing specific pollutants, so the concentration and flow rate of the solution are relatively stable, providing stable experimental conditions for the column experiment, and then Helps improve the accuracy of experimental simulations;

(2) For the continuous water distribution device used in the column experiment provided by the utility model, the syringe is installed in the ring edge fixing groove and the pushing head fixing groove of the injection pump, and the control parameters of the injection pump control system are set according to the experimental needs and adjusted by the flow meter The valve adjusts the water flow rate, and the control system controls the push head fixing groove to push the push head of the syringe at a constant speed, thereby realizing the precise control of the flow rate of the concentrated liquid to be diluted, and injecting the concentrated liquid to be diluted in the syringe into the concentrated liquid at a constant flow rate Inject the tube and mix it with the water in the mixing tube according to the ratio required for the column experiment;

(3) In the continuous water distribution device for column experiments provided by the utility model, the concentrated solution to be diluted is stored in the syringe, the tube body of the syringe is installed in the fixed groove of the syringe pump, and the pusher of the syringe is installed in the fixed groove of the pusher Among them, when the diluted concentrated solution is used up, it is convenient and fast to replace the new syringe, which has little impact on the column experiment;

(4) The continuous water distribution device used for column experiments provided by the utility model can adjust the water flow rate by adjusting the flow meter valve, and adjust the flow rate of the concentrated liquid to be diluted by adjusting the parameters of the injection pump control system, so as to realize different water flow rates and water flow rates to be diluted. The proportion of concentrated liquid flow can realize the preparation of solutions with different concentrations, so it can be applied to simulation experiments of different scales;

(5) In the continuous water distribution device used for column experiments provided by the utility model, when the concentrated liquid injection pipe is connected vertically with the water inlet pipe and the mixing pipe through the T-shaped three-way quick connector, the inner diameter of the concentrated liquid injection pipe is very small, thereby avoiding The turbulent flow is generated due to the high flow rate of the incoming water, which causes the incoming water to enter the concentrate injection pipe to continuously wash away the concentrate and take away the concentrate, which makes the concentration of the distribution water fluctuate greatly and cannot be controlled;

(6) The continuous water distribution device for column experiments provided by the utility model is simple in design, easy to operate, and has a high level of automation. When the experiment period is long or the scale is large, only the concentrated solution to be diluted in the syringe needs to be repeatedly filled. It overcomes the difficulty of periodically filling the preparation solution into the glass tank in the past, thus reducing the workload of the experimenters and reducing the work intensity of the traditional preparation and filling;

(7) The continuous water distribution device used in the column experiment provided by the utility model, the silicone tube connected between the concentrated liquid injection pipe and the T-shaped three-way quick joint interface has corrosion resistance and anti-oxidation performance, and avoids the concentrated liquid injection pipe. The problem of rapid damage due to the corrosion of the concentrated solution; the PEEK tube is strong, high-pressure resistant, and has a long service life;

(8) In the continuous water distribution device used for column experiments provided by the utility model, the L-shaped two-way quick-plug connector provided between the flowmeter and the water inlet pipe can adjust the direction of the pipeline according to the space requirements, thereby saving the space occupied by the water distribution device , You can also adjust the installation position of the flowmeter so that the experimenter can observe the operation.

Description of drawings

Fig. 1 is the schematic diagram of the continuous water distribution device provided by the utility model;

Fig. 2 is the operating effect diagram of the utility model.

In the figure: 1. Type I two-way quick-plug connector; 2. PE tube; 3. Syringe pump; 4. Flow meter; 5. L-type two-way quick-plug connector; 6. T-type three-way quick-plug connector; 7. Syringe; 8. Silicone tube; 9. PEEK two-way connecting tube; 10. PEEK hand-tight connector; 11. PEEK tube; 12. PEEK to male Luer connector; 13. Valve; 101. Water inlet tube; 102. Concentrate injection tube ; 103, a mixing tube; 104, a sampling tube.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figure 1, a kind of continuous water distribution device that is used for column experiment, comprises water inlet pipeline system, concentrated solution injection pipeline system and mixing pipe 103; Described water inlet pipeline system comprises water inlet pipe 101 and flowmeter 4, so The flow meter 4 is arranged on the water inlet pipe 101; the concentrated liquid injection pipeline system includes a concentrated liquid injection pipe 102 and an injection system, the outlet of the injection system communicates with the concentrated liquid injection pipe 102 inlet, and the mixing pipe The inlet of 103 communicates with the outlet of the water inlet pipe 101 and the outlet of the concentrate injection pipe 102, and the outlet of the mixing pipe 103 communicates with the inlet of the experimental column. The water inlet of the water inlet pipe 101 is a pressurized water source, which is used to dilute the solution to be diluted. It can be ultrapure water, deionized water or tap water during specific implementation. In this embodiment, the water inlet pipe 101 is connected to the tap water pipe, and the concentrated solution to be diluted is stored In the injection system, according to the needs of the column experiment, the injection system injects the concentrated solution to be diluted into the concentrated solution injection pipe 102 at a constant flow rate, and the tap water and the concentrated solution to be diluted are mixed and diluted at the confluence of the mixing pipe 103 and the water inlet pipe 101. Columns are formulated to contain solutions of specific contaminant concentrations.

The injection system includes a syringe pump 3 and a syringe 7. The syringe pump 3 includes a control system, a ring edge fixing groove and a push head fixing groove. The tube body of the syringe 7 is installed in the ring edge fixing groove. The push head of the syringe 7 is installed in the push head fixing groove, the outlet of the syringe 7 communicates with the inlet of the concentrated liquid injection pipe 102, and the push head fixing groove is connected with the control system, according to the needs of the column experiment Set the control parameters of the control system of the syringe pump 14, the control system controls the push head fixing groove to push the push head of the syringe 13 so that the concentrated liquid to be diluted in the syringe 13 is injected into the concentrated liquid injection pipe 102 at a set constant flow rate, and the tap water enters Water and the concentrate to be diluted are mixed and diluted at the confluence of the mixing pipe 103 and the water inlet pipe 101 to prepare a solution containing a specific concentration of pollutants.

The inlet of the concentrated solution injection pipe 102 is provided with a hand-tight joint 10, and the outlet of the syringe 7 is provided with a Luer joint 12, the hand-tight joint 10 is matched with the Luer joint 12, and the hand-tight joint 10 and Luer joint 12 are matched. Er joint 12 is connected more tightly, thereby has prevented that the concentrated solution to be diluted leaks at the interface that the syringe and the concentrated solution injection tube are connected.

The flowmeter 4 includes a water inlet, a water outlet, a cone, a float and a flow regulating valve, the cone communicates with the water inlet and the water outlet, the float is arranged in the cone, the The conical tube is provided with a range scale, the flow regulating valve is installed on the water inlet, the flow regulating valve regulates the water flow, and the syringe pump 14 regulates the flow of the concentrated liquid to be diluted, by adjusting the ratio of the water flow to the liquid to be diluted Adjust the dilution factor of the online dilution distribution water.

A sampling tube 104 is also included, the sampling tube 104 communicates with the mixing tube 103 , and the sampling tube 104 is provided with a valve 13 . When the experiment started, the syringe 7 was placed on the syringe pump 3, the valve 13 on the sampling pipe 104 was closed, and then the tap water valve connected to the water inlet pipe 101 was opened, and the control system parameters of the syringe pump 3 and the water inlet pipe 101 were set according to the experimental requirements. Open the valve opening of the flowmeter 4, and then turn on the syringe pump 3 to push the solution to be diluted. After about 2 to 5 minutes, open the sampling tube valve 13 and sample from the outlet of the sampling tube 104 for chemical analysis. After confirming that the effluent meets the requirements, the mixing tube The outlet of 103 is connected with the inlet of the experimental column, and at the same time, the valve 13 of the sampling pipe 104 is closed, and the column experiment starts to run formally. During the operation, samples are taken from the sampling pipe 104 for sampling analysis to ensure the stable operation of the device.

An L-shaped two-way quick-plug joint 5 is arranged between the flow meter 4 and the water inlet pipe 101. The L-shaped two-way quick-plug joint 5 can adjust the direction of the pipeline according to space requirements, thereby saving the space occupied by the water distribution device. The installation position of the flowmeter 4 can also be adjusted so that the experimenter can observe the operation.

Including a T-shaped three-way quick joint 6, the concentrated liquid injection pipe 102, the water inlet pipe 101 and the mixing pipe 103 are respectively communicated with the three interfaces of the T-shaped three-way quick joint 6, and the concentrated liquid The injection pipe 102 is perpendicular to the water inlet pipe 101 and the mixing pipe 103, and the inner diameter of the outlet of the concentrated solution injection pipe 102 is not greater than 1/8 of the inner diameter of the interface of the T-shaped three-way quick joint 6, thereby avoiding the The water inlet flow rate of the water pipe 101 is too high to generate turbulent flow, causing the inlet water flow to enter the concentrated solution injection pipe 102 to continuously wash away the concentrated solution and take away the concentrated solution, which in turn makes the concentration of the solution containing specific pollutants mixed and prepared by the mixing pipe 103 fluctuate greatly. Uncontrollable problems.

A silicone tube 8 is connected between the concentrated liquid injection pipe 102 and the T-shaped three-way quick joint 6 interface, and the silicone tube has excellent corrosion resistance and oxidation resistance, which avoids the risk of damage at the T-shaped three-way quick joint 6 interface Leakage due to corrosion wear.

The concentrated liquid injection pipe 102 is a PEEK tube, which is strong, high-pressure resistant, and has a long service life, and the inner diameter of the PEEK tube is small, which effectively prevents the effect of scouring and dilution.

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Example 1

As shown in Figure 1, a kind of continuous water distribution device that is used for column experiment, comprises water inlet pipeline system, concentrated solution injection pipeline system and mixing pipe 103; Described water inlet pipeline system comprises water inlet pipe 101 and flowmeter 4, so The flow meter 4 is arranged on the water inlet pipe 101; the concentrated liquid injection pipeline system includes a concentrated liquid injection pipe 102 and an injection system, the outlet of the injection system communicates with the concentrated liquid injection pipe 102 inlet, and the mixing pipe The inlet of 103 communicates with the outlet of the water inlet pipe 101 and the outlet of the concentrate injection pipe 102, and the outlet of the mixing pipe 103 communicates with the inlet of the experimental column. The concentrated solution to be diluted is stored in the injection system, the water inlet pipe 101 is connected to the tap water pipe, the injection system injects the concentrated solution to be diluted into the concentrated solution injection pipe 102 at a constant flow rate, and the concentrated solution to be diluted and the incoming water are mixed in the mixing pipe 103 to prepare For solutions containing specific pollutants, set the flow rate of the injection system to push the concentrated solution to be diluted according to the needs of the column experiment, and adjust the flow rate of the incoming water through the flow meter 4, so that the concentrated solution to be diluted and the incoming water at the mixing pipe 103 are constant. Proportional mixing, so the concentration and flow rate of the solution are not easy to fluctuate, the column experiment process is more stable, and the accuracy of the simulation results is higher.

Example 2

As shown in Figure 1, a kind of continuous water distribution device that is used for column experiment, comprises water inlet pipeline system, concentrated solution injection pipeline system and mixing pipe 103; Described water inlet pipeline system comprises water inlet pipe 101 and flowmeter 4, so The flow meter 4 is arranged on the water inlet pipe 101; the concentrated liquid injection pipeline system includes a concentrated liquid injection pipe 102, a syringe 7 and a syringe pump 3, and the concentrated liquid to be diluted is stored in the syringe 7, and the syringe 7 The outlet is in communication with the inlet of the concentrated solution injection pipe 102, the syringe pump 3 includes a control system, a ring edge fixing groove and a push head fixing groove, the tube body of the syringe 7 is installed in the ring edge fixing groove, and the syringe 7 The push head is installed in the push head fixing groove; the inlet of the mixing pipe 103 is connected with the outlet of the water inlet pipe 101 and the outlet of the concentrated solution injection pipe 102, and the outlet of the mixing pipe 103 is connected with the inlet of the experimental column. The syringe pump 3 pushes the plunger of the syringe 7 at a constant speed and then injects the concentrated solution to be diluted in the syringe 7 into the concentrated solution injection pipe 102 at a constant flow rate, and the water inlet pipe 101 is connected with the tap water pipe. Set the control system parameters of the syringe pump 3 according to the experimental needs and the valve opening of the flow meter 4 on the water inlet pipe 101, the tap water and the concentrate to be diluted are collected and mixed in the mixing pipe 103 to prepare the inlet water containing the specified pollutant concentration, thereby realizing the purpose of on-line dilution and water distribution.

When the concentrated solution to be diluted in the syringe 7 is almost used up, prepare a new syringe 7 of the same specification to be filled with the concentrated solution to be diluted, then the syringe pump 3 and the water pipe valve are turned off, and the syringe pump 3 The syringe 7 is quickly removed, and then the new syringe 7 is placed in the ring edge fixing groove and the push head fixing groove of the syringe pump 3 that has been reset. After fixing, the outlet of the new syringe 7 is connected with the inlet of the concentrated liquid injection pipe 102, Then open the injection pump 3 and the tap water pipe valve at the same time. This replacement operation only needs 20 seconds to complete. The time length of the general column experiment is calculated in hours or days. The impact of the pause time can be ignored here. In addition, due to the utility model The new type adopts highly concentrated liquid to automatically and continuously dilute the water distribution on line. Compared with the direct water supply device, the frequency of replacing the concentrated liquid is very low. It is 1000 times longer than the cycle of replacing the liquid supply bag in the utility model.

Example 3

As shown in Figure 1, a kind of continuous water distribution device for column experiment, its structure is compared with embodiment 1, the difference is: described flow meter 4 comprises water inlet, water outlet, conical pipe, float and flow rate Regulating valve, the conical tube communicates with the water inlet and the water outlet, the float is set in the conical tube, the conical tube is provided with a range scale, and the flow regulating valve is installed on the water inlet verbal. The flow regulating valve of the flow meter 4 adjusts the flow rate of the incoming water, and the syringe pump 7 adjusts the flow rate of the concentrated solution to be diluted. By adjusting the ratio of the flow rate of the incoming water flow to the flow rate of the liquid to be diluted, the dilution factor of the on-line dilution distribution water is adjusted, thereby realizing the online preparation of solutions with different concentrations , suitable for simulation experiments of different scales. During specific implementation, the flowmeter 4 can also be an existing rotameter or float flowmeter with a flow regulating valve on the market.

Example 4

As shown in Figure 1, a kind of continuous water distribution device for column experiment, its structure is compared with embodiment 1, the difference is: described continuous water distribution device for column experiment comprises sampling pipe 104, and described sampling pipe 104 communicates with the mixing tube 103 , and the sampling tube 104 is provided with a valve 13 . During the operation of the column experiment, open the sampling pipe valve 13 to take samples from the outlet of the sampling pipe 104 for sampling analysis to ensure the stable operation of the device.

Example 5

As shown in Figure 1, a kind of continuous water distribution device that is used for column experiment, its structure is compared with embodiment 1, and difference is: comprise T-type three-way quick connector 6, described concentrated solution injection pipe 102, described The water inlet pipe 101 and the mixing pipe 103 communicate with the three interfaces of the T-shaped three-way quick joint 6 respectively, and a silicone tube is connected between the concentrated liquid injection pipe 102 and the T-shaped three-way quick joint 6 interfaces. 8. The silicone tube 8 has excellent corrosion resistance and oxidation resistance, thereby effectively avoiding the problem that the concentrated liquid injection pipe 102 is damaged quickly due to the corrosion of the concentrated liquid. The concentrated solution injection pipe 102 is perpendicular to the water inlet pipe 101 and the mixing pipe 103, and the inner diameter of the outlet of the concentrated liquid injection pipe 102 is not greater than 1/8 of the inner diameter of the interface of the T-shaped quick connector (6) . Such structural design can prevent the washing dilution effect, because the T-shaped three-way quick-connect plug 6 is a confluence area, if the inner diameter of the concentrated liquid injection pipe 102 is larger, then due to the horizontal communication with the T-shaped pipe three-way quick-connect connector 6 The water flow velocity in the water pipe 101 is very high, resulting in turbulent flow. This turbulent flow will enter the concentrated liquid injection pipe 102 to continuously wash and dilute the concentrated liquid, and the concentration gradient formed by this dilution effect makes the concentrated liquid in the syringe 7 continue to flow. Diffusion into the concentrated solution injection tube 102 will gradually affect the stability of the concentrated solution concentration in the syringe 7, and the concentration of the prepared solution cannot be controlled; on the contrary, if the concentrated solution injection tube 102 inner diameter is very small, this washing dilution effect will be reduced. will be greatly reduced.

Example 6

As shown in Figure 1, a kind of continuous water distribution device for column experiment, its structure is compared with embodiment 5, and difference is: described concentrated solution injection pipe 102 is PEEK pipe, and PEEK pipe is strong, high pressure resistance, thus The service life is long. In addition, the diameter of the PEEK tube is very small, and the dead zone volume is very small, which effectively prevents the dilution effect of washing.

Example 7

As shown in Figure 1, a continuous water distribution device for column experiments, including: a type of two-way quick-plug connector 1 (inlet 4 points inner wire transfer outlet 3 points quick-plug interface), 30cm long 3 points PE pipe 2, Type I two-way quick-plug connector 1 (the inlet is a 3-point quick-plug interface and the outlet is a 4-point outer wire interface), LZTM-6 liquid float flowmeter 4 (range 2-20L/h), L-type two-way quick-plug connector 5 (the entrance is a 4-point outer wire interface and the outlet is a 3-point quick-plug interface), 5cm long and 3-point PE pipe 2, L-shaped two-way quick-plug connector 5 (both inlet and outlet are 3-point quick-plug interface), 10cm long 3 2 PE pipes, T-type three-way quick-plug connector 6 (horizontal inlet is 3-point quick-plug interface, middle vertical inlet is 2-point quick-plug interface, horizontal outlet is 3-point quick-plug interface), 3cm long 2-point PE pipe 2 , 3cm long silicone tube 8, PEEK two-way connecting tube 9, 1/16-inch PEEK finger-tight connector 10, 1/16-inch PEEK tube 11 (total length 15cm), 1/16-inch PEEK finger-tight connector 10, PEEK to male Luer Connector 12, medical plastic syringe 7 (50mL), precision injection pump 3, 15cm long 3-point PE tube 2, T-type three-way quick-plug connector 6, 10cm long 2-point PE tube 2, 2-point straight-through switch valve 13, 5cm long 2 points of PE pipe 2, 30cm long 3 points of PE pipe 2;

The water inlet pipeline system consists of a type-two two-way quick-plug connector 1 (4 points for the inlet and 3 points for the outlet), a 30 cm long 3-point PE pipe 2, and a type-two two-way quick-plug connector 1 (the inlet is 3 points for the quick plug interface). 4 points for quick-plug interface to outlet), LZTM-6 type liquid float flowmeter 4 (range 2-20L/h), L-type two-way quick-plug connector 5 (inlet is 4 points, outer wire interface to outlet 3 Quick-plug interface), 5cm long 3-point PE tube 2, L-shaped two-way quick-plug connector 5 (both inlet and outlet are 3-point quick-plug interface) and 10cm long 3-point PE tube 2 connected in sequence, L-shaped two-way The quick-plug connector 5 can adjust the direction of the pipeline according to the space requirements, thereby saving the space occupied by the water distribution device, and can also adjust the installation position of the flowmeter, so that the experimenter can observe the operation;

The concentrated liquid injection pipeline system consists of 3cm long 2-point PE pipe 2, 3cm long silicone pipe 8, PEEK two-way connecting pipe 9, 1/16 inch PEEK hand-tight joint 10, 1/16 inch PEEK pipe 11 (total length 15cm ), 1/16-inch PEEK hand-tight connector 10, PEEK-to-male Luer connector 12 and medical plastic syringe 7 (50mL) connected in sequence; the silicone tube 8 has excellent corrosion resistance and oxidation resistance, and the PEEK material is strong and resistant to high pressure, so it is used The service life is longer; the hand-tight connector 10 and the Luer connector 12 are connected more closely, thereby effectively preventing the concentrated liquid to be diluted from leaking at the interface between the syringe and the concentrated liquid injection tube; the medical plastic syringe 7 is installed on the precision On the syringe pump 3, the syringe pump 7 pushes the concentrated solution to be diluted in the syringe 3 at a set constant flow rate;

The mixing pipe 103 is composed of a 15cm long 3-point PE pipe 2, a T-type three-way quick-plug connector 6 and a 10cm long 2-point PE pipe 2 connected in sequence, and the 15cm long 3-point PE pipe 2 and the 10cm long 2 The PE pipe 2 is connected horizontally with the T-type three-way quick-plug connector 6;

The concentrated liquid injection pipe 102 is perpendicular to the water inlet pipe 101 and the mixing pipe 103, and the concentrated liquid injection pipe 102, the water inlet pipe 101 and the mixing pipe 103 pass through the T-shaped three-way quick-connect plug 6 connected;

The sampling pipe 104 is composed of a 30cm long 3-point PE pipe 2, a 2-point straight-through switch valve 13 and a 5cm long 2-point PE pipe 2 connected in sequence, and the 30cm long 3-point PE pipe 2 is connected with the T on the mixing pipe 103. Type three-way quick-plug connector 6 vertical ports are connected.

The outlet of the device is connected to the inlet of the experimental column, and the experimental column bed volume (BV) is 0.5L. The design goal is to mix the high-concentration arsenic solution with tap water through a continuous water distribution device to continuously prepare simulated micro-pollution with an As concentration of 50 μg/L. Water is passed through the experimental column at a constant flow rate of 20BV/h (10L/h). Syringe 7 is filled with 50mL As concentrated solution with a concentration of 500mg/L. During the operation of the device, a certain volume is taken at intervals through the valve 15 to measure the concentration of As in the distribution water to check the operation stability of the device. The concentration of As is analyzed by atomic fluorescence spectrometer, and the analysis results As shown in Figure 2, the figure shows that during the continuous operation of the device at 4200L (8400BV, after 420h), the concentration of As in the distribution water is continuously stable at 50-52μg/L, which meets the requirements of the experimental design goal and reflects the good performance of the device. stability. In addition, this device can provide 240L of water distribution containing specified concentration of pollutants for the continuous supply of the experimental column, which greatly reduces the work intensity of the traditional filling preparation method. During the 420h operation time, the device only needs to repeatedly replace the filling A medical plastic syringe 7 (50 mL) with a high-concentration arsenic concentrate is enough without other operations, so the device has a high degree of automation. In addition, the required accessories are common commercially available standard products, which are cheap and easy to obtain, and their cost is much lower than that of commercially available commercial high-precision automatic diluters and industrial on-line diluters. Common commercially available syringe pumps 3 push flow setting range is 0.1-1000mL/h, and flowmeters with different sizes and ranges can be selected according to the experimental conditions. The injection pump pushes the flow range, the dilution factor range of this device is 1-5000000 times, and the total flow rate of the mixing pipe 103 of this device is 1-500L/h, so it can realize the preparation of solutions with different concentrations, and is suitable for simulation experiments of different scales.

Claims (9)

1. a kind of continuous water dispensing apparatus for column experiments, it is characterised in that：Including inlet pipeline system, concentrate filling line System and mixing tube (103)；The inlet pipeline system includes water inlet pipe (101) and flowmeter (4), and the flowmeter (4) sets Put on the water inlet pipe (101)；The concentrate filling line system includes concentrate ascending pipe (102) and injecting systems, The outlet of the injecting systems is connected with concentrate ascending pipe (102) entrance, the entrance and water inlet pipe of the mixing tube (103) (101) outlet is connected with the outlet of concentrate ascending pipe (102), outlet and the experiment column inlet of the mixing tube (103) Connection.

2. the continuous water dispensing apparatus according to claim 1 for column experiments, it is characterised in that：The injecting systems include Syringe pump (3) and syringe (7), described syringe pump (3) include control system, circle side fixing groove and fixing groove of cutting somebody's hair, described The body of syringe (7) is arranged in the fixing groove of the circle side, the fixing groove of being cut somebody's hair described in of cutting somebody's hair of the syringe (7) In, the outlet of the syringe (7) is connected with concentrate ascending pipe (102) entrance, cut somebody's hair fixing groove and the control System connection processed.

3. the continuous water dispensing apparatus according to claim 2 for column experiments, it is characterised in that：The concentrate ascending pipe (102) hand-tight joint (10) is provided with entrance, the outlet of the syringe (7) is provided with female Luer (12), described Hand-tight joint (10) and the female Luer (12) are engaged.

4. the continuous water dispensing apparatus according to claim 1 for column experiments, it is characterised in that：Described flowmeter (4) Including water inlet, delivery port, Taper Pipe, float and flow control valve, the Taper Pipe connects the water inlet and the delivery port, institute State float to be arranged in the Taper Pipe, range scale is provided with the Taper Pipe, the flow control valve is arranged on the water inlet On mouth.

5. the continuous water dispensing apparatus according to claim 1 for column experiments, it is characterised in that：Also include sampling pipe (104), the sampling pipe (104) is connected with described mixing tube (103), and valve (13) is provided with the sampling pipe (104).

6. the continuous water dispensing apparatus according to claim 1 for column experiments, it is characterised in that：The flowmeter (4) with L-type two, which is provided with, between the water inlet pipe (101) leads to quick connector (5).

7. the continuous water dispensing apparatus according to claim 1 for column experiments, it is characterised in that：It is quick including T-shaped threeway Joint (6), the concentrate ascending pipe (102), the water inlet pipe (101) and the mixing tube (103) are respectively with described T-shaped three Three orifices of logical quick connector (6), and the concentrate ascending pipe (102) and the water inlet pipe (101) and described mix Close pipe (103) vertical, concentrate ascending pipe (102) exit inside diameter is not more than T-shaped threeway quick connector (6) interface The 1/8 of internal diameter.

8. the continuous water dispensing apparatus according to claim 7 for column experiments, it is characterised in that：The concentrate ascending pipe (102) it is connected with silicone tube (8) between T-shaped threeway quick connector (6) interface.

9. the continuous water dispensing apparatus for column experiments according to any one of claims 1 to 3,7 or 8, it is characterised in that： The concentrate ascending pipe (102) is managed for PEEK.