Automatic filling and adding device for alkali liquor

Abstract

The utility model discloses an automatic alkali liquor filling and adding device which comprises a liquid alkali storage tank (1), a liquid alkali container (2) and a water tank (3), a first metering pump (4) is arranged between the liquid alkali storage tank (1) and the liquid alkali container (2), a second metering pump (5) is arranged between the liquid alkali container (2) and the water tank (3), a pH electrode (6) is arranged in the water tank (3) and is connected with a controller (8) through a pH instrument (7), and the controller (8) is connected with the controller (8). The first metering pump (4) and the second metering pump (5) are both connected with a controller (8); a first liquid level meter (9) is arranged in the liquid caustic soda storage tank (1), a second liquid level meter (10) is arranged in the liquid caustic soda container (2), a third liquid level meter (11) is arranged in the water tank (3), and the first liquid level meter (9), the second liquid level meter (10) and the third liquid level meter (11) are all connected with a controller (8). The alkali liquor supplementing device has the advantages of high alkali liquor supplementing efficiency and simplicity in operation.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment equipment, and particularly relates to an automatic alkali solution filling and dosing device. Background Art

[0002] Traditional water companies are mainly responsible for the supply of municipal tap water. With the development of society, many water companies are currently engaged in sewage treatment. In the process of sewage treatment, alkali solution is one of the commonly used chemical raw materials, and the alkali solution is obtained by diluting high-concentration liquid alkali to a certain pH value. During the use of the alkali solution, due to its corrosive, volatile and unstable consumption rate characteristics, the liquid level of the alkali solution container often needs to be monitored and replenished. The traditional method is manual monitoring and replenishment, which has the problems of low efficiency and cumbersome operation. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an automatic alkali solution filling and dosing device. The utility model has the advantages of high alkali solution replenishment efficiency and simple operation.

[0004] The technical solution of the utility model: an automatic alkali solution filling and dosing device, which includes a liquid alkali storage tank with a volume of more than 5 cubic meters, a liquid alkali container with a volume of 1 - 3 cubic meters, and a water tank with a volume of more than 5 cubic meters. A first metering pump is provided between the liquid alkali storage tank and the liquid alkali container, a second metering pump is provided between the liquid alkali container and the water tank, a pH electrode is provided in the water tank, the pH electrode is connected to a controller through a pH meter, and both the first metering pump and the second metering pump are connected to the controller.

[0005] In the above-mentioned automatic alkali solution filling and dosing device, a first liquid level gauge is provided in the liquid alkali storage tank, a second liquid level gauge is provided in the liquid alkali container, a third liquid level gauge is provided in the water tank, and the first liquid level gauge, the second liquid level gauge and the third liquid level gauge are all connected to the controller.

[0006] In the above-mentioned automatic alkali solution filling and dosing device, the water tank is connected to a gas source through an air pipe.

[0007] In the above-mentioned automatic alkali solution filling and dosing device, the gas source is an air compressor, and a solenoid valve connected to the controller is provided on the air pipe.

[0008] In the above-mentioned automatic alkali solution filling and dosing device, an air disc connected to the air pipe is provided in the water tank.

[0009] In the above-mentioned automatic alkali solution filling and dosing device, the water tank is connected to a water source through a third metering pump, and the third metering pump is connected to the controller.

[0010] In the above-mentioned automatic alkali solution filling and dosing device, an alarm device is connected to the controller.

[0011] Compared with the prior art, the utility model can store a large amount of high-concentration liquid caustic soda at one time by setting a large-capacity liquid caustic soda storage tank, which is convenient for obtaining liquid caustic soda by low-cost wholesale. And a small-capacity liquid caustic soda container is used to store part of the liquid caustic soda. When the liquid caustic soda in the storage tank is used up, it can ensure that the factory can continue to operate normally for a period of time, thus gaining time for the procurement of liquid caustic soda. The high-concentration liquid caustic soda is diluted in the water tank and mixed evenly into caustic liquor for sewage treatment. The whole process is automatically completed and basically does not require manual intervention, resulting in high efficiency of caustic liquor replenishment and simple operation. Therefore, the utility model has the advantages of high efficiency of caustic liquor replenishment and simple operation. Brief Description of the Drawings

[0012] Figure 1 is a schematic structural view of the utility model.

[0013] The reference signs in the drawings are: 1 - liquid caustic soda storage tank, 2 - liquid caustic soda container, 3 - water tank, 4 - first metering pump, 5 - second metering pump, 6 - pH electrode, 7 - pH meter, 8 - controller, 9 - first liquid level gauge, 10 - second liquid level gauge, 11 - third liquid level gauge, 12 - air pipe, 13 - air source, 14 - solenoid valve, 15 - air disk, 16 - third metering pump, 17 - alarm device, 18 - drain valve. Detailed Embodiments

[0014] The following further illustrates the utility model with reference to the drawings and embodiments, but it shall not be used as a basis for limiting the utility model.

[0015] Embodiment. An automatic caustic liquor filling and dosing device, as Figure 1 shown, includes a liquid caustic soda storage tank 1 with a volume of 10 cubic meters, a liquid caustic soda container 2 with a volume of 2 cubic meters, and a water tank 3 with a volume of 15 cubic meters. A drain valve 18 is provided at the bottom of the water tank 3. Further optimization can be that one liquid caustic soda storage tank 1 is equipped with multiple liquid caustic soda containers 2, and each liquid caustic soda container 2 is equipped with a water tank 3. Within the factory area, a liquid caustic soda container 2 and a water tank 3 are placed corresponding to each section that needs to use caustic liquor for the sewage treatment of that section, while the liquid caustic soda storage tank 1 supplies the liquid caustic soda required for the entire factory area.

[0016] A first liquid level gauge 9 is provided inside the liquid caustic soda storage tank 1, a second liquid level gauge 10 is provided inside the liquid caustic soda container 2, and a third liquid level gauge 11 is provided inside the water tank 3.

[0017] A first metering pump 4 is provided between the liquid caustic soda storage tank 1 and the liquid caustic soda container 2, a second metering pump 5 is provided between the liquid caustic soda container 2 and the water tank 3, and the water tank 3 is connected to a water source (such as a water pool) through a third metering pump 16.

[0018] The water tank 3 is provided with a pH electrode 6. The pH electrode 6 is connected to a controller 8 through a pH meter 7. The water tank 3 is connected to a gas source 13 through an air pipe 12. The gas source 13 is an air compressor. The air pipe 12 is provided with a solenoid valve 14. The water tank 3 is provided with an air disk 15 connected to the air pipe 12.

[0019] The first liquid level gauge 9, the second liquid level gauge 10, the third liquid level gauge 11, the first metering pump 4, the second metering pump 5, and the third metering pump 16 are all connected to the controller 8. An audible and visual alarm device 17 is connected to the controller 8.

[0020] Usage method: High-concentration sodium hydroxide liquid caustic is transported to the factory by a special vehicle and pumped into the liquid caustic storage tank 1. One vehicle is purchased at a time, and a larger quantity is cheaper, meeting the large usage demand for sewage treatment. The controller 8 obtains the liquid level height information of the liquid caustic storage tank 1 through the first liquid level gauge 9. When the liquid level height of the liquid caustic storage tank 1 is lower than a certain value, the controller 8 activates the alarm device 17 to prompt the worker to purchase in time and replenish the liquid caustic to the liquid caustic storage tank 1. When the liquid level height of the liquid caustic storage tank 1 exceeds a certain value, the controller 8 also activates the alarm device 17 to prevent the worker from pumping too much liquid caustic into the liquid caustic storage tank 1 and avoid liquid caustic overflow. Only when an appropriate volume of liquid caustic is maintained in the liquid caustic storage tank 1 does the alarm device 17 stop working.

[0021] The function of the second liquid level gauge 10 refers to the function of the first liquid level gauge 9. When the liquid level height of the liquid caustic container 2 is lower than a certain value, the controller 8 activates the first metering pump 4 to replenish the liquid caustic into the liquid caustic container 2. The liquid caustic is obtained from the liquid caustic storage tank 1. When the liquid level height of the liquid caustic container 2 is higher than a certain value, the first metering pump 4 stops working, so that the volume of the liquid caustic in the liquid caustic container 2 fluctuates within a certain range, neither overflowing nor being retained too much. Usually, it is set to retain 1.5 - 1.8 cubic meters of liquid caustic. When the liquid caustic in the liquid caustic storage tank 1 is used up, it can still retain enough liquid caustic for the workshop to work for a period of time, leaving enough time for purchasing liquid caustic.

[0022] The function of the third liquid level gauge 11 refers to the function of the first liquid level gauge 9. When the liquid level height of the water tank 3 is lower than a certain value, the controller 8 starts the second metering pump 5 and the third metering pump 16. The second metering pump 5 pumps a certain amount of liquid caustic soda into the water tank 3, and the third metering pump 16 pumps a certain amount of water into the water tank 3. The caustic soda solution in the water tank 3 increases and the liquid level rises. When the liquid level height of the water tank 3 is higher than a certain value (such as reaching 70% of the volume of the water tank 3), the controller 8 obtains the pH value of the caustic soda solution in the water tank 3 through the pH meter 7 and the pH electrode 6. If the pH value is lower than the required value, the third metering pump 16 stops working until the pH value reaches the standard, and then the second metering pump 5 stops. On the contrary, if the pH value is higher than the required value, the second metering pump 5 stops working until the pH value reaches the standard, and the third metering pump 16 stops working. However, in any case, when the liquid level height of the water tank 3 continues to rise to another value (such as 90% of the volume of the water tank 3), both the second metering pump 5 and the third metering pump 16 need to stop working. This situation generally does not occur because the pH of the caustic soda solution prepared by pumping liquid caustic soda and water into the water tank 3 through the metering pump is relatively stable, and only a small amount of liquid caustic soda or water needs to be supplemented after pH detection. When the caustic soda solution is to be used, it can be discharged through the drain valve 18. It is more appropriate to keep about 10 - 12 cubic meters of caustic soda solution in the water tank 3.

[0023] Each time liquid caustic soda and water are supplemented to the water tank 3, the controller 8 synchronously opens the solenoid valve 14. Compressed air enters the water tank 3 through the air pipe 12 and the air disk 15. The air floats upward, driving the caustic soda solution to mix evenly. The solenoid valve 14 closes again 3 - 5 minutes after stopping the supplementation of liquid caustic soda and water to the water tank 3, ensuring the even mixing of the liquid caustic soda and water while saving compressed air.

[0024] The present utility model is a technical solution proposed in response to the problems found in the actual production and operation process. It is used in the plant renovation project, with low renovation cost and good practicability.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

Claims

1. An automatic alkali solution filling and dosing device, characterized in that: The invention comprises a liquid alkali storage tank (1) with a volume of more than 5 cubic meters, a liquid alkali container (2) with a volume of 1-3 cubic meters, and a water tank (3) with a volume of more than 5 cubic meters. A first metering pump (4) is arranged between the liquid alkali storage tank (1) and the liquid alkali container (2), a second metering pump (5) is arranged between the liquid alkali container (2) and the water tank (3), a pH electrode (6) is arranged in the water tank (3), the pH electrode (6) is connected to a controller (8) via a pH meter (7), and both the first metering pump (4) and the second metering pump (5) are connected to the controller (8).

2. The automatic alkali solution filling and dosing device according to claim 1 is characterized in that: The liquid alkali storage tank (1) is provided with a first liquid level gauge (9), the liquid alkali container (2) is provided with a second liquid level gauge (10), the water tank (3) is provided with a third liquid level gauge (11), and the first liquid level gauge (9), the second liquid level gauge (10) and the third liquid level gauge (11) are all connected to a controller (8).

3. The automatic alkali solution filling and dosing device according to claim 1 is characterized in that: The water tank (3) is connected to an air source (13) via an air pipe (12).

4. The automatic alkali solution filling and dosing device according to claim 3 is characterized in that: The gas source (13) is an air compressor, and the gas pipe (12) is provided with a solenoid valve (14) connected to a controller (8).

5. The automatic alkali solution filling and dosing device according to claim 3 is characterized in that: An air disk (15) connected to the air pipe (12) is provided in the water tank (3).

6. The automatic alkali solution filling and dosing device according to claim 1 is characterized in that: The water tank (3) is connected to a water source via a third metering pump (16), and the third metering pump (16) is connected to a controller (8).

7. The automatic alkali solution filling and dosing device according to claim 1 is characterized in that: The controller (8) is connected to an alarm device (17).

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