Caustic soda adding system

Abstract

The utility model discloses a caustic soda dosing system which comprises a stock solution pool, a dilution tank, a first water ejector and a second water ejector, the stock solution pool is connected with a chemical inlet through a first connecting pipe, and a water inlet of the first water ejector is connected with pressure water through a second connecting pipe. A liquid inlet of the first water ejector is connected with the stock solution pool through a third connecting pipe, a water outlet of the first water ejector is connected with the dilution tank through a fourth connecting pipe, a water inlet of the second water ejector is connected with pressure water through a fifth connecting pipe, a liquid inlet of the second water ejector is connected with the dilution tank through a sixth connecting pipe, and a water outlet of the third water ejector is connected with the third connecting pipe. A water outlet of the second water ejector is connected with a feeding point through a seventh connecting pipe, and the sixth connecting pipe is sequentially provided with an electromagnetic flow meter and a rotor flow meter. The device is simple in structure, high in feeding efficiency, accurate in metering, accurate in feeding and accurate in control of the pH value of factory water, improves the pH stability of the factory water, ensures the safety of water quality, and meets the requirements of batch water treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, and particularly relates to a caustic soda dosing system. Background Art

[0002] Water plants in the south mainly use the water from the Dashahe Reservoir as the raw water for production. The pH value of the raw water is in the range of 6.9 - 7.1. Lime is added and diluted with water and stirred in the production workshop (lime room). Solid lime is dissolved manually, and then pumped into the inlet mixing tank by a small water pump. Currently, there are the following disadvantages in adding lime: 1. At the dosing site, since it is necessary to unpack and pour bagged lime into the pool for stirring and dissolving, lime dust causes dust on the workshop floor, walls and equipment, affecting environmental hygiene. 2. The lime solution is pumped by a small water pump and conveyed through a PVC pipe to the mixing tank. Since the lime solution contains impurities and cannot be fully dissolved, it is extremely easy to cause blockage of the water pump and pipeline, posing a risk of interruption of dosing. And a certain amount of maintenance and replacement costs of the small water pump are required every year. 3. Since the dosing amount of the lime solution is controlled by a valve and there is a lack of metering equipment, it is difficult to achieve accurate dosing. At the same time, due to the small opening of the valve, it is easily blocked by insoluble substances (foreign objects), and on-site inspection and adjustment by operators are often required. Since the main function of adding lime is to adjust the pH value of the factory water, caustic soda is later used to replace lime dosing. However, in the existing caustic soda dosing system, the dosing efficiency is low, the metering is not accurate enough, mostly in a rough dosing mode, and the control of the pH value of the factory water is not accurate enough, which cannot meet the requirements of batch water treatment. Therefore, in order to avoid the disadvantages existing in the prior art, it is necessary to make improvements to the prior art. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the disadvantages and deficiencies in the prior art, and provide a caustic soda dosing system with high dosing efficiency and accurate metering.

[0004] The utility model is realized by the following technical solutions:

[0005] A caustic soda dosing system includes a stock solution tank, a dilution tank, a first water injector and a second water injector. The stock solution tank is connected to a medicine inlet through a first connecting pipe. The water inlet of the first water injector is connected to pressurized water through a second connecting pipe. The liquid inlet of the first water injector is connected to the stock solution tank through a third connecting pipe. The water outlet of the first water injector is connected to the dilution tank through a fourth connecting pipe. The water inlet of the second water injector is connected to pressurized water through a fifth connecting pipe. The liquid inlet of the second water injector is connected to the dilution tank through a sixth connecting pipe. The water outlet of the second water injector is connected to a dosing point through a seventh connecting pipe. An electromagnetic flowmeter and a rotameter are successively arranged on the sixth connecting pipe.

[0006] Further, a first liquid level gauge is arranged on the upper part of the stock solution tank.

[0007] Further, a second liquid level gauge is provided at the upper part of the dilution tank.

[0008] Further, a first control valve is provided on the first connecting pipe.

[0009] Further, a second control valve is provided on the third connecting pipe.

[0010] Further, a third control valve is provided at the liquid inlet end of the sixth connecting pipe, and the sixth connecting pipe extends to the bottom of the dilution tank.

[0011] Further, a fourth control valve and a fifth control valve are respectively provided at both ends of the electromagnetic flowmeter.

[0012] Further, a needle valve is provided at the liquid outlet end of the rotameter.

[0013] Further, a sixth control valve is provided on the seventh connecting pipe near the second water injector, and a seventh control valve is provided on the seventh connecting pipe near the dosing point.

[0014] Further, the sixth connecting pipe has a diameter of 20 mm, and the seventh connecting pipe has a diameter of 50 mm.

[0015] Compared with the prior art, the utility model stores caustic soda by setting a stock solution tank, preliminarily dilutes caustic soda by setting a first water injector, stores the diluted caustic soda by setting a dilution tank, dilutes and doses caustic soda in proportion by setting a second water injector, installs an electromagnetic flowmeter and a rotameter to control and measure the dosing amount of caustic soda, so that the structure of the caustic soda dosing system is simple, the dosing efficiency is high, the measurement is accurate, the dosing is precise, the pH value of the factory water is accurately controlled, the pH stability of the factory water is improved, the water quality safety is guaranteed, and the requirements of batch water treatment are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of the caustic soda dosing system of the present utility model.

[0018] In the figure: 1 - stock solution tank; 2 - dilution tank; 3 - first water injector; 4 - second water injector; 5 - first connecting pipe; 6 - second connecting pipe; 7 - third connecting pipe; 8 - fourth connecting pipe; 9 - fifth connecting pipe; 10 - sixth connecting pipe; 11 - seventh connecting pipe; 12 - electromagnetic flowmeter; 13 - rotameter; 14 - first liquid level gauge; 15 - second liquid level gauge; 16 - first control valve; 17 - second control valve; 18 - third control valve; 19 - fourth control valve; 20 - fifth control valve; 21 - needle valve; 22 - sixth control valve; 23 - seventh control valve. Specific implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] As Figure 1 shown, a caustic soda dosing system of the present invention includes a stock solution tank 1, a dilution tank 2, a first water injector 3 and a second water injector 4. The stock solution tank 1 is connected to the medicine inlet through the first connecting pipe 5. The water inlet of the first water injector 3 is connected to the pressure water through the second connecting pipe 6. The liquid inlet of the first water injector 3 is connected to the stock solution tank 1 through the third connecting pipe 7. The water outlet of the first water injector 3 is connected to the dilution tank 2 through the fourth connecting pipe 8. The water inlet of the second water injector 4 is connected to the pressure water through the fifth connecting pipe 9. The liquid inlet of the second water injector 4 is connected to the dilution tank 2 through the sixth connecting pipe 10. The water outlet of the second water injector 4 is connected to the dosing point through the seventh connecting pipe 11. The sixth connecting pipe 10 is successively provided with an electromagnetic flowmeter 12 and a rotameter 13. By setting the stock solution tank 1 to store caustic soda, setting the first water injector 3 to preliminarily dilute caustic soda, setting the dilution tank 2 to store the diluted caustic soda, setting the second water injector 4 to dilute and dose caustic soda in proportion, and installing the electromagnetic flowmeter 12 and the rotameter 13 to control and measure the caustic soda dosing amount, the structure of the caustic soda dosing system is simple, the dosing efficiency is high, the measurement is accurate, the dosing is precise, the control of the pH value of the produced water is accurate, the stability of the pH of the produced water is improved, the water quality safety is guaranteed, and the requirements of batch water treatment are met.

[0021] A first liquid level gauge 14 is provided at the upper part of the stock solution tank 1 to measure the remaining amount of caustic soda in the stock solution tank 1, which is convenient for timely replenishment of caustic soda.

[0022] A second liquid level gauge 15 is provided at the upper part of the dilution tank 2 to measure the remaining amount of diluted caustic soda in the dilution tank 2, which is convenient for timely replenishment of diluted caustic soda.

[0023] The first connecting pipe 5 is provided with a first control valve 16 to facilitate the liquid inlet control of caustic soda and timely supplement caustic soda.

[0024] The third connecting pipe 7 is provided with a second control valve 17 to facilitate the control of the extraction of caustic soda by the first water injector 3.

[0025] The liquid inlet end of the sixth connecting pipe 10 is provided with a third control valve 18. The sixth connecting pipe 10 extends to the bottom of the dilution tank 2 to facilitate the control of the extraction of diluted caustic soda by the second water injector 4. In a specific implementation, the number of the third control valves 18 is two, and the control is more accurate and safer.

[0026] Fourth control valve 19 and fifth control valve 20 are respectively provided at both ends of the electromagnetic flowmeter 12 to improve the accuracy of the liquid inlet and outlet control of the electromagnetic flowmeter 12 and improve the accuracy of the measurement of the electromagnetic flowmeter 12.

[0027] A needle valve 21 is provided at the liquid outlet end of the rotameter 13 to improve the accuracy of the liquid outlet control of the rotameter 13 and improve the accuracy of the measurement of the rotameter 13.

[0028] A sixth control valve 22 is provided at a position where the seventh connecting pipe 11 is close to the second water injector 4, and a seventh control valve 23 is provided at a position where the seventh connecting pipe 11 is close to the dosing point to effectively control the stability of the caustic soda dosing.

[0029] As a specific implementation manner, the diameter of the sixth connecting pipe 10 is 20 mm, and the diameter of the seventh connecting pipe 11 is 50 mm, which is convenient for the accurate control of the amount of caustic soda and the high-efficiency dosing of caustic soda.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A caustic soda dosing system, characterized in that: It includes a stock liquid pool, a dilution tank, a first water ejector and a second water ejector, the stock liquid pool is connected to a drug inlet through a first connecting pipe, the water inlet of the first water ejector is connected to pressurized water through a second connecting pipe, the liquid inlet of the first water ejector is connected to the stock liquid pool through a third connecting pipe, the water outlet of the first water ejector is connected to the dilution tank through a fourth connecting pipe, the water inlet of the second water ejector is connected to pressurized water through a fifth connecting pipe, the liquid inlet of the second water ejector is connected to the dilution tank through a sixth connecting pipe, the water outlet of the second water ejector is connected to a dosing point through a seventh connecting pipe, and the sixth connecting pipe is provided with an electromagnetic flowmeter and a rotor flowmeter in sequence.

2. The caustic soda dosing system according to claim 1, characterized in that: A first liquid level meter is arranged in the raw liquid pool.

3. The caustic soda dosing system according to claim 1, characterized in that: A second liquid level gauge is arranged in the dilution tank.

4. The caustic soda dosing system according to claim 1, characterized in that: The first connecting pipe is provided with a first control valve.

5. The caustic soda dosing system according to claim 1, characterized in that: The third connecting pipe is provided with a second control valve.

6. The caustic soda dosing system according to claim 1, characterized in that: A third control valve is provided at the liquid inlet end of the sixth connecting pipe, and the sixth connecting pipe extends to the bottom of the dilution tank.

7. The caustic soda dosing system according to claim 1, characterized in that: A fourth control valve and a fifth control valve are respectively disposed at two ends of the electromagnetic flowmeter.

8. The caustic soda dosing system according to claim 1, characterized in that: A needle valve is provided at the liquid outlet end of the rotor flowmeter.

9. The caustic soda dosing system according to claim 1, characterized in that: A sixth control valve is provided at the seventh connecting pipe near the second water ejector, and a seventh control valve is provided at the seventh connecting pipe near the injection point.

10. The caustic soda dosing system according to claim 1, characterized in that: The diameter of the sixth connecting pipe is 20 mm, and the diameter of the seventh connecting pipe is 50 mm.

Images