Automatic dosing device for fluorine removal agent

Abstract

The utility model relates to the technical field of sewage treatment, in particular to an automatic dosing device for a fluorine removal agent. The automatic fluorine removal agent adding device comprises an iron-based fluorine removal agent liquid preparation tank, a reaction tank and a calcium-based fluorine removal agent liquid preparation tank, a spraying disc is arranged above the reaction tank, the iron-based fluorine removal agent liquid preparation tank is connected with the spraying disc through an iron-based fluorine removal agent filter, the calcium-based fluorine removal agent liquid preparation tank is connected with a temporary storage tank through a calcium-based fluorine removal agent filter, and the temporary storage tank is connected with the reaction tank. The temporary storage tank is connected with the reaction tank through a secondary feeding pump, and the reaction tank is connected with a sewage inlet pipeline. According to the device, the reaction tank is divided into the primary treatment area and the secondary treatment area, the calcium-based fluorine removal agent and the iron-based fluorine removal agent are prepared respectively, the calcium-based fluorine removal agent firstly treats sewage to remove a large amount of fluorine-containing impurities, and then the iron-based fluorine removal agent is added to treat the sewage with reduced fluorine content, so that the fluorine removal effect is greatly improved, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an automatic dosing device for a defluorination agent. Background Art

[0002] Fluoride remover is a chemical agent used to remove fluoride ions from water. It plays a key role in the treatment of drinking water, industrial wastewater and sewage, and can effectively reduce the concentration of fluoride ions in water to meet the national emission standards or safety standards for drinking. Fluoride removers include calcium-based defluoridants, iron-based defluoridants, etc.

[0003] In the actual treatment process, the existing device uses a single defluoridation agent to treat sewage. However, due to the large fluctuation of the fluoride ion content in sewage, the use of a single defluoridation agent often results in poor defluoridation effect. In addition, the existing device uses a semi-automatic addition method, which requires manual detection of the fluoride content in the sewage, calculation of the addition amount, and then addition of the defluoridation agent. This results in poor timeliness and large errors in the addition amount. Either the defluoridation agent is excessive, resulting in waste, or the defluoridation agent is insufficient and the treatment is not thorough. Utility Model Content

[0004] In view of the deficiencies in the above prior art, the purpose of the utility model is to provide an automatic dosing device for defluorinating agent, which divides the reaction pool into a primary treatment area and a secondary treatment area, and prepares a calcium-based defluorinating agent and an iron-based defluorinating agent respectively. The calcium-based defluorinating agent is first used to treat the sewage to remove a large amount of fluorine-containing impurities, and then the iron-based defluorinating agent is added to treat the sewage with reduced fluorine content, thereby greatly improving the defluorination effect and saving costs; through the coordinated use of a PLC controller, a flow meter, a thermometer and a fluorine content detector, the sewage is monitored in real time, and the pumping amount of the primary feed pump and the secondary feed pump is controlled by the PLC controller, thereby greatly improving the accuracy of addition and improving the sewage treatment efficiency; through the use of the heat in the calcium-based defluorinating agent preparation tank for the insulation of the iron-based defluorinating agent preparation tank, the energy utilization rate and the dissolution efficiency of the iron-based defluorinating agent are greatly improved.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The automatic dosing device for defluorinating agent comprises an iron-based defluorinating agent preparation tank, a reaction tank, and a calcium-based defluorinating agent preparation tank. A spray plate is arranged above the reaction tank. The iron-based defluorinating agent preparation tank is connected to the spray plate through an iron-based defluorinating agent filter. The calcium-based defluorinating agent preparation tank is connected to a temporary storage tank through a calcium-based defluorinating agent filter. The temporary storage tank is connected to the reaction tank through a secondary feed pump. A sewage inlet pipe is connected to the reaction tank. A flow meter, a thermometer, and a fluorine content detector are arranged on the sewage inlet pipe. The flow meter, the thermometer, and the fluorine content detector are all connected to a PLC controller. The PLC controller is connected to the secondary feed pump. The calcium-based defluorinating agent is a calcium salt.

[0007] The iron-based defluorination agent preparation tank is connected to a lower hopper, an arch-breaking shaft is arranged inside the lower hopper, an anti-arch chain is arranged on the arch-breaking shaft, and an iron-based defluorination agent preparation tank insulation cover is arranged on the outer side of the iron-based defluorination agent preparation tank.

[0008] A primary feed pump is arranged between the iron-based defluorinating agent liquid preparation tank and the iron-based defluorinating agent filter, and the primary feed pump is connected to a PLC controller.

[0009] After receiving the signals from the flow meter, the temperature detector and the fluorine content detector, the PLC controller adjusts the opening of the primary feed pump and the secondary feed pump.

[0010] An isolation baffle is arranged inside the reaction pool, and the isolation baffle does not contact the bottom of the reaction pool. The isolation baffle divides the reaction pool into a primary treatment area and a secondary treatment area, and the spray plate is located above the secondary treatment area.

[0011] The top of the isolation baffle is higher than the liquid level of the reaction tank, and the bottom is at a certain distance from the bottom of the reaction tank, thereby ensuring the isolation of the primary treatment area and the secondary treatment area above and the connection below.

[0012] The sewage inlet pipeline is connected to the primary treatment area, a liquid inlet is arranged on the primary treatment area, a disperser is arranged inside the primary treatment area, and a secondary feed pump is respectively connected to the liquid inlet and the disperser.

[0013] The calcium-based defluoridation agent filter is provided with a filter plate inside, and a connecting pipe is provided between the calcium-based defluoridation agent filter and the temporary storage tank, and a flushing pipe is connected to the connecting pipe. Flushing water in the flushing pipe enters the calcium-based defluoridation agent filter from below the filter plate through the connecting pipe, and flushes part of the undissolved calcium salt back into the calcium-based defluoridation agent preparation tank.

[0014] The connection between the calcium-based defluorinating agent preparation tank and the calcium-based defluorinating agent filter is located above the filter plate, and the connection between the temporary storage tank and the calcium-based defluorinating agent filter is located below the filter plate.

[0015] A cooling coil is arranged inside the calcium-based defluorination agent preparation tank, and the cooling coil is connected to the insulation jacket of the iron-based defluorination agent preparation tank through an insulation jacket inlet pipeline.

[0016] The working principle of the utility model is:

[0017] The iron-based defluorinating agent in the lower hopper enters the iron-based defluorinating agent preparation tank through a pipeline for preparation, and then enters the iron-based defluorinating agent filter through a primary feed pump for filtration. After the filtration is completed, it enters the secondary treatment area through a spray plate; after the calcium-based defluorinating agent is prepared in the calcium-based defluorinating agent preparation tank, it enters the temporary storage tank after being treated by the calcium-based defluorinating agent filter, and then enters the primary treatment area through a secondary feed pump; the sewage enters the primary treatment area through a flow meter, a thermometer and a fluorine content detector, and the sewage is transmitted to the PLC controller through the signal collected by the flow meter, the thermometer and the fluorine content detector. The PLC controller adjusts the opening of the primary feed pump and the secondary feed pump according to the transmitted data to treat the sewage. Among them, the flushing water in the flushing pipe enters the calcium-based defluorinating agent filter from the bottom of the filter plate through a connecting pipe, and some undissolved calcium salts are flushed back to the calcium-based defluorinating agent preparation tank. The heat in the calcium-based defluorinating agent preparation tank is used for the insulation of the iron-based defluorinating agent preparation tank, thereby improving the energy utilization rate and the dissolution efficiency of the iron-based defluorinating agent.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] By adopting the automatic defluoridation agent dosing device of the utility model, the reaction pool is divided into a primary treatment area and a secondary treatment area, and the calcium-based defluoridation agent and the iron-based defluoridation agent are prepared respectively. The calcium-based defluoridation agent is first used to treat the sewage to remove a large amount of fluorine-containing impurities, and then the iron-based defluoridation agent is added to treat the sewage with reduced fluorine content, thereby greatly improving the defluoridation effect and saving costs; through the coordinated use of a PLC controller, a flow meter, a temperature detector and a fluorine content detector, the sewage is monitored in real time, and the pumping amount of the primary feed pump and the secondary feed pump is controlled by the PLC controller, thereby greatly improving the accuracy of addition and improving the sewage treatment efficiency; by using the heat in the calcium-based defluoridation agent preparation tank for the heat preservation of the iron-based defluoridation agent preparation tank, the energy utilization rate and the dissolution efficiency of the iron-based defluoridation agent are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the automatic dosing device for defluorination agent of the utility model;

[0021] In the figure: 1. iron-based defluorinating agent preparation tank; 2. iron-based defluorinating agent filter; 3. reaction tank; 4. calcium-based defluorinating agent preparation tank; 5. calcium-based defluorinating agent filter; 6. temporary storage tank; 7. sewage inlet pipe; 8. PLC controller; 9. discharge hopper; 10. anti-arch chain; 11. insulation cover of iron-based defluorinating agent preparation tank; 12. primary feed pump; 13. isolation baffle; 14. primary treatment area; 15. secondary treatment area; 16. spray plate; 17. disperser; 18. liquid inlet; 19. flow meter; 20. temperature detector; 21. fluorine content detector; 22. secondary feed pump; 23. connecting pipe; 24. flushing pipe; 25. filter plate; 26. cooling coil; 27. pipe entering the insulation cover. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Example 1

[0024] like Figure 1 As shown, the automatic defluorinating agent dosing device includes an iron-based defluorinating agent preparation tank 1, a reaction tank 3, and a calcium-based defluorinating agent preparation tank 4. A spray plate 16 is provided above the reaction tank 3. The iron-based defluorinating agent preparation tank 1 is connected to the spray plate 16 through an iron-based defluorinating agent filter 2. The calcium-based defluorinating agent preparation tank 4 is connected to a temporary storage tank 6 through a calcium-based defluorinating agent filter 5. The temporary storage tank 6 is connected to the reaction tank 3 through a secondary feed pump 22. The reaction tank 3 is connected to a sewage inlet pipe 7. The sewage inlet pipe 7 is provided with a flow meter 19, a thermometer 20 and a fluorine content detector 21. The flow meter 19, the thermometer 20 and the fluorine content detector 21 are all connected to a PLC controller 8, and the PLC controller 8 is connected to the secondary feed pump 22. The iron-based defluorinating agent preparation tank 1 is connected with a lower hopper 9, the lower hopper 9 is provided with an arch-breaking shaft inside, the arch-breaking shaft is provided with an anti-arch chain 10, and the outer side of the iron-based defluorinating agent preparation tank 1 is provided with an iron-based defluorinating agent preparation tank insulation cover 11. A primary feed pump 12 is provided between the iron-based defluorinating agent preparation tank 1 and the iron-based defluorinating agent filter 2, and the primary feed pump 12 is connected to the PLC controller 8. An isolation baffle 13 is provided inside the reaction pool 3, and the isolation baffle 13 does not contact the bottom of the reaction pool 3. The isolation baffle 13 divides the reaction pool 3 into a primary treatment area 14 and a secondary treatment area 15, and the spray plate 16 is located above the secondary treatment area 15. The isolation baffle 13 is higher than the liquid level of the reaction pool 3 above, and there is a certain distance between the bottom and the bottom of the reaction pool 3, which ensures the isolation of the primary treatment area 14 and the secondary treatment area 15 above and the connection below. The sewage inlet pipe 7 is connected to the primary treatment area 14, the primary treatment area 14 is provided with a liquid inlet 18, the primary treatment area 14 is provided with a disperser 17, and the secondary feed pump 22 is respectively connected to the liquid inlet 18 and the disperser 17. A filter plate 25 is provided inside the calcium-based defluorinating agent filter 5, and a connecting pipe 23 is provided between the calcium-based defluorinating agent filter 5 and the temporary storage tank 6, and a flushing pipe 24 is connected to the connecting pipe 23. The connection between the calcium-based defluorinating agent preparation tank 4 and the calcium-based defluorinating agent filter 5 is located above the filter plate 25, and the connection between the temporary storage tank 6 and the calcium-based defluorinating agent filter 5 is located below the filter plate 25. A cooling coil 26 is provided inside the calcium-based defluorinating agent preparation tank 4, and the cooling coil 26 is connected to the iron-based defluorinating agent preparation tank insulation jacket 11 through the insulation jacket inlet pipe 27.

[0025] The above-mentioned automatic defluorination agent dosing device, when working, includes the following steps:

[0026] (1) The iron-based defluorinating agent in the lower hopper 9 enters the iron-based defluorinating agent preparation tank 1 through a pipeline for preparation, and then enters the iron-based defluorinating agent filter 2 through the primary feed pump 12 for filtration. After the filtration is completed, it enters the secondary treatment area 15 through the spray plate 16; (2) After the calcium-based defluorinating agent is prepared in the calcium-based defluorinating agent preparation tank 4, it enters the temporary storage tank 6 after being processed by the calcium-based defluorinating agent filter 5, and then enters the primary treatment area 14 through the secondary feed pump 22; (3) The sewage enters the primary treatment area 14 through the flow meter 19, the thermometer 20 and the fluorine content detector 21. The signals collected by the sewage through the flow meter 19, the thermometer 20 and the fluorine content detector 21 are transmitted to the PLC controller 8. The PLC controller 8 adjusts the opening of the primary feed pump 12 and the secondary feed pump 22 according to the transmitted data to treat the sewage.

Claims

1. A defluorination agent automatic dosing device, characterized in that: The invention comprises an iron-based defluorinating agent preparation tank (1), a reaction tank (3), and a calcium-based defluorinating agent preparation tank (4). A spray plate (16) is arranged above the reaction tank (3). The iron-based defluorinating agent preparation tank (1) is connected to the spray plate (16) via an iron-based defluorinating agent filter (2). The calcium-based defluorinating agent preparation tank (4) is connected to a temporary storage tank (6) via a calcium-based defluorinating agent filter (5). The temporary storage tank (6) is connected to the reaction tank (3) via a secondary feed pump (22). The reaction tank (3) is connected to a sewage inlet pipe (7). A flow meter (19), a temperature detector (20), and a fluorine content detector (21) are arranged on the sewage inlet pipe (7). The flow meter (19), the temperature detector (20), and the fluorine content detector (21) are all connected to a PLC controller (8). The PLC controller (8) is connected to the secondary feed pump (22).

2. The automatic defluorination agent dosing device according to claim 1, characterized in that: The iron-based defluorination agent preparation tank (1) is connected to a lower hopper (9), an arch-breaking shaft is provided inside the lower hopper (9), an anti-arch chain (10) is provided on the arch-breaking shaft, and an iron-based defluorination agent preparation tank insulation jacket (11) is provided on the outer side of the iron-based defluorination agent preparation tank (1).

3. The automatic defluorination agent dosing device according to claim 1, characterized in that: A primary feed pump (12) is provided between the iron-based defluorinating agent liquid preparation tank (1) and the iron-based defluorinating agent filter (2), and the primary feed pump (12) is connected to a PLC controller (8).

4. The automatic defluorination agent dosing device according to claim 1, characterized in that: An isolation baffle (13) is provided inside the reaction pool (3), the isolation baffle (13) not being in contact with the bottom of the reaction pool (3), the isolation baffle (13) dividing the reaction pool (3) into a primary treatment area (14) and a secondary treatment area (15), and the spray plate (16) is located above the secondary treatment area (15).

5. The automatic defluorination agent dosing device according to claim 4, characterized in that: The sewage inlet pipe (7) is connected to the primary treatment area (14), a liquid inlet (18) is provided on the primary treatment area (14), a disperser (17) is provided inside the primary treatment area (14), and a secondary feed pump (22) is respectively connected to the liquid inlet (18) and the disperser (17).

6. The automatic defluorination agent dosing device according to claim 1, characterized in that: A filter plate (25) is provided inside the calcium-based defluorinating agent filter (5), a connecting pipe (23) is provided between the calcium-based defluorinating agent filter (5) and the temporary storage tank (6), and a flushing pipe (24) is connected to the connecting pipe (23).

7. The automatic defluorination agent dosing device according to claim 6, characterized in that: The connection between the calcium-based defluorinating agent preparation tank (4) and the calcium-based defluorinating agent filter (5) is located above the filter plate (25), and the connection between the temporary storage tank (6) and the calcium-based defluorinating agent filter (5) is located below the filter plate (25).

8. The automatic defluorination agent dosing device according to claim 2, characterized in that: The calcium-based defluorination agent preparation tank (4) is provided with a cooling coil (26) inside, and the cooling coil (26) is connected to the iron-based defluorination agent preparation tank insulation jacket (11) through the insulation jacket inlet pipe (27).

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