An ammonium chloride concentrated liquid adding device for landfill leachate treatment device

Abstract

This utility model discloses an ammonium chloride concentrate addition device for a landfill leachate treatment apparatus, relating to the technical field of dosing devices. It includes a suction pipe with two branch pipes connected to the end of the suction pipe furthest from the storage tank. Each branch pipe is connected to a metering pump, and the outlet of the metering pump is connected to a delivery pipe. The end of the delivery pipe is connected to a horizontal buffer, and a vertical buffer is connected in series with the horizontal buffer. A pressure gauge is installed on the top of the vertical buffer. The horizontal buffer is also connected to the storage tank via a return pipe, and a manual butterfly valve and a safety valve are connected in series with the return pipe. In use, the metering pump draws the concentrate from the storage tank through the suction pipe and delivers it to the horizontal buffer for buffering through the delivery pipe. Then, it is discharged through the supply pipe to the dosing point of the landfill leachate treatment apparatus. The two metering pumps can be used alternately, ensuring uninterrupted dosing while also guaranteeing the service life and ease of maintenance of the metering pumps.

Description

Technical Field

[0001] This utility model specifically relates to the field of chemical dosing devices, and more specifically to an ammonium chloride concentrate dosing device for landfill leachate treatment. Background Technology

[0002] Leachate often contains high concentrations of pollutants, making direct treatment difficult. Concentration concentrates these high-concentration pollutants, facilitating more targeted subsequent treatment methods such as advanced oxidation and incineration. For instance, after evaporation and concentration, the concentrations of organic matter and salts in the concentrate increase; incineration at this point can more thoroughly remove pollutants, improving treatment efficiency and effectiveness.

[0003] Concentration can significantly reduce the volume of landfill leachate. For example, evaporation or membrane technologies can be used to separate most of the water, thereby reducing the amount of water needed for subsequent treatment, and decreasing the size and cost of treatment equipment. Leachate concentration is achieved through a triple-effect heating chamber.

[0004] During the treatment of landfill leachate, it was found that significant scaling occurred in the triple-effect heating chamber. Our company conducted multiple experiments on the scaling phenomenon and ultimately discovered that ammonium chloride has the ability to reduce scaling during the evaporation of concentrated liquid. The specific experiment is as follows: Four identical beakers were taken, and 1L of concentrated liquid was added to each. Beaker No. 1 did not contain ammonium chloride, while beakers No. 2-4 contained 1g, 2g, and 3g of ammonium chloride, respectively. A constant temperature water bath was used, and water was added to raise the temperature to 93℃ (simulating the temperature of a single-effect heating chamber). Beakers No. 0-4 were placed in the constant temperature water bath in sequence for continuous evaporation. After 24 hours, when approximately 60% of the concentrated liquid in the beakers had evaporated, the results are as follows: Beaker 1: In the beaker without added ammonium chloride, there is more scale attached to the inside of the beaker, and the amount of concentrated liquid remaining is more than in the other 3 beakers.

[0005] Beaker 2: A small amount of scale has formed on the inner wall of the beaker containing 1 gram of ammonium chloride.

[0006] Beaker 3: In the beaker with 2 grams of ammonium chloride added, there was no scaling and the amount of concentrated liquid remaining was less than in the previous two beakers.

[0007] Beaker 4: In the beaker with 3 grams of ammonium chloride added, there was no scale buildup inside, and the amount of concentrated liquid remaining was less than in the previous three beakers.

[0008] Through the above experiments, we found a suitable ratio for adding ammonium chloride; therefore, we provide a device that can accurately feed ammonium chloride. Utility Model Content

[0009] The purpose of this invention is to provide an ammonium chloride concentrate addition device for landfill leachate treatment equipment, which can accurately add the solution and ensure continuous operation of the equipment; thereby solving the technical problems mentioned in the background art.

[0010] To achieve the above objectives, this utility model provides the following technical solution: An ammonium chloride concentrate addition device for landfill leachate treatment includes a suction pipe connected to a storage tank. The end of the suction pipe away from the storage tank is connected to two branch pipes via a T-junction. Each of the two branch pipes is connected to a metering pump, and the outlet end of the metering pump is connected to a delivery pipe. The end of the conveying pipe is connected to a horizontal buffer, and a vertical buffer is connected in series on the horizontal buffer; a pressure gauge is provided on the top of the vertical buffer. The horizontal buffer is also connected to the storage tank via a return pipe, and a manual butterfly valve and a safety valve are connected in series on the return pipe. The horizontal buffer is connected to a liquid supply pipe on one side; a back pressure valve and a check valve are connected in series on the liquid supply pipe.

[0011] As a further technical solution of this utility model, a safety valve is connected in series on the conveying pipe; the metering pump is fixed on the truss, and the truss is welded to the frame body.

[0012] As a further technical solution of this utility model, a main valve and a Y-type filter are connected in series on the liquid extraction tube.

[0013] As a further technical solution of this utility model, the two metering pumps are electrically connected to the control cabinet via wires; the control cabinet is fixed on one side of the frame.

[0014] As a further technical solution of this utility model, the liquid storage tank is fixed on the frame body, and a stirring mechanism is installed on the top of the liquid storage tank. A flip-type liquid level gauge is also installed on one side of the liquid storage tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. In use, the metering pump draws the liquid from the storage tank through the extraction pipe and delivers it to the horizontal buffer through the delivery pipe for buffering. Then, it is discharged through the supply pipe and supplied to the dosing point of the landfill leachate treatment equipment.

[0016] 2. In this utility model, the two metering pumps can be used alternately, which can ensure uninterrupted drug dosing, as well as the service life and maintenance convenience of the metering pumps; when one of the metering pumps fails, the equipment can be repaired without shutting down.

[0017] 3. In this utility model, the manual butterfly valve is in the normally open state, and the safety valve is connected to the return pipe to prevent the backflow of medicine due to excessive pressure at the dosing point outlet. When the pressure at the outlet is too high, the safety valve opens, and the medicine flows back to the storage tank through the return pipe, thereby achieving the effect of depressurizing the outlet. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This utility model Figure 1 A schematic diagram of the bottom side structure.

[0020] Figure 3 This utility model Figure 1 The left view.

[0021] Figure 4 This utility model Figure 1 Top view.

[0022] Figure 5 This utility model Figure 1 A magnified view of a portion of the image.

[0023] Figure 6 This utility model Figure 2 A magnified view of a portion of the image.

[0024] Figure 7 This utility model Figure 4 A magnified view of a portion of the image.

[0025] In the diagram: 1-Liquid extraction pipe, 2-Liquid storage tank, 3-Stirring mechanism, 4-Flip-type level gauge, 5-Trunk, 6-Metering pump, 7-Safety valve, 8-Transfer pipe, 9-Horizontal buffer, 10-Vertical buffer, 11-Pressure gauge, 12-Return pipe, 13-Manual butterfly valve, 14-Safety valve, 15-Liquid supply pipe, 16-Back pressure valve, 17-Main valve, 18-Y-type filter, 19-Frame, 20-Control cabinet, 21-Diverter pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-7In this embodiment of the present invention, an ammonium chloride concentrate addition device for landfill leachate treatment includes a suction pipe 1 connected to a storage tank 2. The end of the suction pipe 1 away from the storage tank 2 is connected to two branch pipes 21 via a three-way pipe. The two branch pipes 21 are respectively connected to a metering pump 6, and the outlet end of the metering pump 6 is connected to a delivery pipe 8. A safety valve 7 is connected in series on the delivery pipe 8. The metering pump 6 is fixed on a truss 5, and the truss 5 is welded to the frame body 19.

[0028] The end of the conveying pipe 8 is connected to the horizontal buffer 9, and a vertical buffer 10 is connected in series on the horizontal buffer 9; a pressure gauge 11 is provided on the top of the vertical buffer 10.

[0029] By adopting the above technical solution, when in use, the metering pump 6 draws out the liquid from the storage tank 2 through the extraction pipe 1, and delivers it to the horizontal buffer 9 through the delivery pipe 8 for buffering, and then discharges it through the supply pipe 15 to the dosing point of the landfill leachate treatment equipment.

[0030] The two metering pumps 6 can be used alternately, which can ensure uninterrupted drug dosing, as well as the service life and ease of maintenance of the metering pumps 6.

[0031] More specifically, the horizontal buffer 9 is connected in series with the vertical buffer 10. The core function of the vertical buffer 10 is to optimize the pressure buffering performance and improve the accuracy and safety of system pressure monitoring.

[0032] The advantage of horizontal buffers is that they have a large lateral volume and can adapt to horizontal pipeline layouts, but their buffering effect on vertical pressure shocks (such as instantaneous high pressure and gas-liquid mixing shocks) is limited. After adding a vertical buffer, the two form a "three-dimensional buffer combination" which can specifically solve the pressure fluctuation problem in different scenarios.

[0033] If there is a "sudden change in the flow of medium in the vertical pipeline" in the system (such as the "water hammer effect" caused by the start-up and shutdown of the pump or the rapid opening and closing of the valve), the vertical cavity of the vertical buffer can directly offset the pressure impact in the vertical direction through the rapid compression / expansion of the internal medium (usually gas or hydraulic oil), thus preventing the impact energy from being transmitted to the horizontal buffer along the pipeline (reducing the load on the horizontal buffer).

[0034] In this embodiment, a main valve 17 and a Y-type filter 18 are connected in series on the liquid extraction pipe 1.

[0035] By adopting the above technical solution, when the drug supply system malfunctions and there is no time to stop the machine, the main valve 17 can be closed instantly to cut off the drug solution; the Y-type filter 18 can filter the drug solution, reduce impurities in the drug solution, and prevent impurities from entering the metering pump 6 and causing blockage.

[0036] In this embodiment, two metering pumps 6 are electrically connected to the control cabinet 20 via wires; the control cabinet 20 is fixed to one side of the frame body 19.

[0037] The control cabinet 20 is equipped with a PLC control system for timing switching of the two metering pumps 6, thereby ensuring that the two metering pumps 6 work alternately.

[0038] In this embodiment, the liquid storage tank 2 is fixed on the frame body 19. A stirring mechanism 3 is installed on the top of the liquid storage tank 2, and a flip-type liquid level gauge 4 is also installed on one side of the liquid storage tank 2.

[0039] In this embodiment, the horizontal buffer 9 is also connected to the storage tank 2 via the return pipe 12, and a manual butterfly valve 13 and a safety valve 14 are connected in series on the return pipe 12.

[0040] By adopting the above technical solution, the manual butterfly valve 13 is in the normally open state, and the safety valve 14 is connected to the return pipe 12 to prevent the backflow of medicine caused by excessive pressure at the dosing point outlet.

[0041] When the pressure at the outlet is too high, the safety valve 14 opens, and the liquid medicine flows back to the storage tank 2 through the return pipe 12, thereby achieving the effect of depressurizing the outlet.

[0042] The horizontal buffer 9 is connected to a liquid supply pipe 15 on one side; a back pressure valve 16 and a check valve are connected in series on the liquid supply pipe 15.

[0043] The back pressure valve can be set to a "minimum back pressure value" (such as 0.2MPa) to ensure that the pressure at the injection outlet is always higher than the saturated vapor pressure of the medium, avoid the generation of cavitation bubbles, and ensure that the metering element always works in a stable state of "full liquid and no bubbles", so as to ensure that the injection amount is consistent with the set value.

[0044] The working principle of this utility model is as follows: When in use, the metering pump 6 draws out the liquid from the storage tank 2 through the extraction pipe 1, and then delivers it to the horizontal buffer 9 through the delivery pipe 8 for buffering. Then it is discharged through the supply pipe 15 and supplied to the dosing point of the landfill leachate treatment equipment.

[0045] The two metering pumps 6 can be used alternately, which can ensure uninterrupted drug addition and also guarantee the service life and maintenance convenience of the metering pumps 6; the manual butterfly valve 13 is in the normally open state, and the safety valve 14 is connected to the return pipe 12 to prevent the drug from flowing back due to excessive pressure at the drug outlet.

[0046] When the pressure at the outlet is too high, the safety valve 14 opens, and the liquid medicine flows back to the storage tank 2 through the return pipe 12, thereby achieving the effect of depressurizing the outlet.

[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A concentrated ammonium chloride solution addition device for landfill leachate treatment equipment, characterized in that: Includes a pumping pipe (1) connected to the storage tank (2), and the end of the pumping pipe (1) away from the storage tank (2) is connected to two branch pipes (21) through a three-way pipe; the two branch pipes (21) are respectively connected to a metering pump (6), and the outlet end of the metering pump (6) is connected to a delivery pipe (8). The end of the conveying pipe (8) is connected to the horizontal buffer (9), and a vertical buffer (10) is connected in series on the horizontal buffer (9); a pressure gauge (11) is provided on the top of the vertical buffer (10). The horizontal buffer (9) is also connected to the storage tank (2) via a return pipe (12), and a manual butterfly valve (13) and a safety valve (14) are connected in series on the return pipe (12). The horizontal buffer (9) is connected to a liquid supply pipe (15) on one side; a back pressure valve (16) and a check valve are connected in series on the liquid supply pipe (15).

2. The ammonium chloride concentrated solution adding device for a landfill leachate treatment apparatus according to claim 1, characterized by: A safety valve (7) is connected in series on the conveying pipe (8); the metering pump (6) is fixed on the truss (5), and the truss (5) is welded to the frame body (19).

3. The ammonium chloride concentrated solution adding device for a landfill leachate treatment apparatus according to claim 1, characterized by: A main valve (17) and a Y-type filter (18) are connected in series on the liquid extraction tube (1).

4. The ammonium chloride concentrated solution adding device for a landfill leachate treatment apparatus according to claim 1, characterized by: Two metering pumps (6) are electrically connected to the control cabinet (20) via wires; the control cabinet (20) is fixed to one side of the frame body (19).

5. The ammonium chloride concentrated solution adding device for a landfill leachate treatment apparatus according to claim 1, characterized by: The storage tank (2) is fixed on the frame body (19). A stirring mechanism (3) is installed on the top of the storage tank (2), and a flip-type liquid level gauge (4) is also installed on one side of the storage tank (2).

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