Electrolyte additive feeding device

Abstract

The utility model discloses an electrolyte additive feeding device. Belongs to the technical field of lead-acid storage battery acid preparation. The problems that fumed silica powder drifts away, personal safety hazards exist and environmental pollution exists during manual weighing and adding in the prior art are mainly solved. The device is mainly characterized by consisting of a storage tank, a feeding tank, an acid preparation tank, a powder flowmeter, a high-pressure gas source, a negative pressure system, a connecting pipeline and a control valve, the storage tank, the feeding tank and the acid preparation tank are all closed tank bodies; a powder flow meter is arranged on a connecting pipeline between the storage tank and the feeding tank; a control valve is arranged on the discharge pipe between the feed tank and the acid preparation tank; and control valves are arranged on connecting pipelines for connecting the high-pressure air source and the negative-pressure system with the feeding tank. The device provided by the utility model has the characteristics that the additive can be weighed in a negative-pressure closed environment and the weighed additive can be directly introduced below the liquid level of the electrolyte, and is mainly used for weighing and adding fumed silica in the process of preparing the electrolyte of the storage battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead-acid battery acid preparation, and particularly relates to a feeding device for battery electrolyte additives. Background Art

[0002] For some lead-acid battery electrolytes, fumed silica needs to be added. Fumed silica is a fluffy white powder with a particle size of 7 - 40 nanometers. During the process of weighing and adding fumed silica in the preparation of electrolyte, the current method of manual weighing and adding in an atmospheric environment easily causes the powder to disperse, ultimately resulting in personal safety and environmental pollution. Or adding it in a negative pressure environment, but the addition of silica is not in a completely sealed environment, and it is not directly introduced below the liquid level of the electrolyte. It settles into the electrolyte by its own weight, and the silica powder will also disperse from the addition port and the ventilation hole of the acid preparation tank, also causing personal safety and environmental pollution. Content of the Utility Model

[0003] The purpose of the utility model is to address the deficiencies of the above-mentioned existing technologies and provide a feeding device for electrolyte additives, which can solve the problems of silica powder dispersion, personal safety, and environmental pollution.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A feeding device for electrolyte additives, characterized in that it consists of a storage tank, a feeding tank, an acid preparation tank, a powder flow meter, a high-pressure gas source, and a negative pressure system; wherein, the storage tank, the feeding tank, and the acid preparation tank are all closed tanks; the storage tank is connected to the feeding tank through a first connecting pipe, and a powder flow meter and a first control valve are installed on the first connecting pipe; the feeding tank is connected to the acid preparation tank through a discharge pipe, and a fourth control valve is provided on the discharge pipe; the high-pressure gas source and the negative pressure system are respectively connected to the feeding tank through second and third connecting pipes, a second control valve is provided on the second connecting pipe, and a third control valve is provided on the third connecting pipe.

[0005] In the technical solution of the utility model, the outlet ends of the first connecting pipe, the second connecting pipe, and the third connecting pipe are arranged at the top of the feeding tank.

[0006] In the technical solution of the utility model, the discharge pipe is a straight pipe, and the lower port of the straight pipe is located below the liquid level in the acid preparation tank.

[0007] In the technical solution of the utility model, the discharge pipe is a pneumatic telescopic pipe. When the pneumatic telescopic pipe is in a contracted state, the lower port is located above the liquid level in the acid preparation tank, and when the pneumatic telescopic pipe is in an extended state, the lower port is located below the liquid level in the acid preparation tank; a liquid level sensor is provided on the acid preparation tank.

[0008] In the technical solution of the utility model, the material of the discharge pipe is corrosion-resistant material.

[0009] The corrosion-resistant material described in the technical solution of the present utility model is 316 stainless steel material.

[0010] The negative pressure system described in the technical solution of the present utility model is composed of a filter box body, a filter, a pulse backwashing device, a fourth connecting pipe, a vacuum pump and a third connecting pipe.

[0011] The filter described in the technical solution of the present utility model is arranged inside the filter box body, and the pulse backwashing device and the fourth connecting pipe are arranged on the top of the filter box body.

[0012] The filter described in the technical solution of the present utility model is a dust filter with a filtration accuracy of ≤5 nanometers, which is used for gas and silica separation; the pulse backwashing device periodically performs pulse backwashing to clean the silica on the surface of the filter, ensuring continuous and stable material suction.

[0013] Since the present utility model adopts an electrolyte additive feeding device composed of a storage tank, a feeding tank, a acid mixing tank, a powder flow meter, a high-pressure gas source and a negative pressure system, wherein the storage tank, the feeding tank and the acid mixing tank are all closed tanks, the storage tank is connected to the feeding tank through a first connecting pipe, a powder flow meter and a first control valve are installed on the first connecting pipe, the feeding tank is connected to the acid mixing tank through a discharge pipe, a fourth control valve is arranged on the discharge pipe, the high-pressure gas source and the negative pressure system are respectively connected to the feeding tank through the second and third connecting pipes, a second control valve is arranged on the second connecting pipe, and a third control valve is arranged on the third connecting pipe. Therefore, when weighing and feeding, the vacuum pump, the third control valve and the first control valve are started, the second control valve and the fourth control valve are closed, so that a negative pressure is formed in the feeding tank, and the gaseous silica powder is sucked from the storage tank into the feeding tank. The powder flow meter real-time monitors and controls the flow rate of the gaseous silica. After the weight reaches the requirement, the first control valve is closed. When discharging, the third control valve is closed, the second control valve and the fourth control valve are opened, so that a high pressure is formed in the feeding tank, and the gaseous silica is directly blown into the acid mixing tank through the discharge pipe. In addition, when the lower port of the discharge pipe is below the liquid level in the acid mixing tank, the gaseous silica can be directly blown into the electrolyte through the discharge pipe.

[0014] The present utility model has the characteristics of being able to weigh the electrolyte additive by a powder flow meter in a negative pressure and airtight environment and directly introducing the weighed electrolyte additive below the electrolyte liquid level through a high-pressure gas source, and is mainly used for weighing and adding gaseous silica during the preparation of lead-acid battery electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] In the figure: 1 - storage tank; 2 - powder flowmeter; 3 - feed tank; 4 - filter box body; 5 - filter; 6 - pulse backwashing device; 7 - vacuum pump; 8 - high-pressure gas source; 9 - liquid level sensor; 10 - pneumatic telescopic pipe; 11 - acid preparation tank; 12 - first control valve; 13 - second control valve; 14 - third control valve; 15 - fourth control valve. Specific embodiments

[0017] 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.

[0018] Please refer to Figure 1 , an embodiment of a device for adding electrolyte additives of the present invention, which is composed of a storage tank 1, a first connecting pipe, a powder flowmeter 2, a first control valve 12, a feed tank 3, a high-pressure gas source 8, a second connecting pipe, a second control valve 13, a filter box body 4, a filter 5, a pulse backwashing device 6, a fourth connecting pipe, a vacuum pump 7, a third connecting pipe, a third control valve 14, a pneumatic telescopic pipe 10, a fourth control valve 15, an acid preparation tank 11 and a liquid level sensor 9.

[0019] The storage tank 1 is a closed tank body, provided with a sealed feed port, and contains fumed silica for adding to the lead-acid battery electrolyte. The two ends of the first connecting pipe are respectively connected to the bottom of the storage tank 1 and the top of the feed tank 3. The powder flowmeter 2 is arranged on the first connecting pipe for monitoring and controlling the powder flow rate and accurately controlling the addition dosage. The first control valve 12 is arranged at the port of the first connecting pipe close to the feed tank 3.

[0020] The feed tank 3 is a closed tank body, provided with a sealed top cover. The upper end of the outer pipe of the pneumatic telescopic pipe 10 is connected to the center of the bottom of the feed tank 3, and the fourth control valve 15 is arranged on the pneumatic telescopic pipe 10.

[0021] The high-pressure gas source 8 is connected to the top of the feed tank 3 through the second connecting pipe, and the second control valve 13 is arranged at the port of the second connecting pipe close to the feed tank 3.

[0022] The filter box housing 4, filter 5, pulse backflush device 6, fourth connecting pipe, vacuum pump 7 and third connecting pipe form a negative pressure system. The bottom of the filter box housing 4 is connected to the top of the feed tank 3 through the third connecting pipe, and the third control valve 14 is arranged at the port of the third connecting pipe close to the feed tank 3. The two ends of the fourth connecting pipe are respectively connected to the filter box housing 4 and the vacuum pump 9. When the vacuum pump 9, the first control valve 12 and the third control valve 14 are started, a negative pressure is formed in the filter box housing 4 and the feed tank 3, and the fumed silica is sucked into the feed tank 3 through the connecting pipe. The filter 5 is a dust filter with a filtration accuracy of ≤5 nm, which separates the gas and silica powder. The pulse backflush device 6 periodically performs pulse backflushing to clean the silica on the surface of the filter, ensuring the normal operation of the material suction and the accurate addition of silica.

[0023] The acid preparation tank 11 is a closed tank body with a sealed top cover. The lower port of the outer pipe of the pneumatic telescopic pipe 10 is located inside the acid preparation tank 11, and the lower part of the outer pipe of the pneumatic telescopic pipe 10 is hermetically connected to the top of the acid preparation tank 11. When the inner telescopic pipe of the pneumatic telescopic pipe 10 is in the contracted state, its lower port is above the liquid level in the acid preparation tank 11, and when it is in the extended state, its lower port is below the liquid level in the acid preparation tank 11. The pneumatic telescopic pipe 10 is made of 316 stainless steel or other corrosion-resistant materials. The liquid level sensor 9 is arranged at the top of the acid preparation tank 11. When discharging, the liquid level sensor 9 detects the liquid level height to control the extension length of the pneumatic telescopic pipe 10, so that its end is immersed below the electrolyte liquid level. The fumed silica is directly added to the electrolyte, effectively solving the problem of powder dispersion. At the same time, the addition of high-pressure gas can also play a stirring role, which is beneficial to the dispersion and dissolution of silica. After the addition is completed, the pneumatic telescopic pipe 10 automatically restores according to the liquid level height detected by the liquid level sensor 9 to prevent the pneumatic telescopic pipe 10 from being corroded by long-term immersion and impurities from being introduced into the electrolyte.

[0024] When weighing and feeding, start the vacuum pump 7, the third control valve 14 and the first control valve 12, and close the second control valve 13 and the fourth control valve 15 to form a negative pressure in the feed tank 3. The fumed silica powder is sucked into the feed tank 3 from the storage tank 1. The powder flowmeter 2 monitors and controls the flow rate of the fumed silica in real time. During the addition process, the pulse backflush device 6 is intermittently opened to blow off the powder adsorbed on the filter to ensure continuous and stable material suction. After the weight reaches the requirement, close the first control valve 12, and the pulse backflush device 6 continuously backflushes to completely blow off the powder adsorbed on the filter to ensure the accurate addition of silica.

[0025] When discharging, the liquid level sensor 9 preferentially controls the pneumatic telescopic pipe 10 to extend, so that its end is immersed below the electrolyte liquid level, closes the third control valve 14, opens the second control valve 13 and the fourth control valve 15, forms a high pressure in the feed tank, and blows the fumed silica powder directly into the electrolyte through the pneumatic telescopic pipe 10. After the addition is completed, the pneumatic telescopic pipe 10 automatically returns to its original state.

[0026] The utility model conducts weighing and conveying through the powder flowmeter 2 and negative pressure suction feeding, and directly passes the powder material below the electrolyte liquid level through the high-pressure air source 8, the pneumatic telescopic pipe 10 and the liquid level sensor 9. The whole process of weighing, conveying and adding is carried out in a negative pressure and airtight environment, which can solve the problem of fumed silica powder floating and solve the problems of personal safety and environmental pollution.

[0027] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An electrolyte additive feeding device, characterized in that: The invention comprises a storage tank (1), a feed tank (3), an acid preparation tank (11), a powder flow meter (2), a high-pressure gas source (8) and a negative pressure system; wherein the storage tank (1), the feed tank (3) and the acid preparation tank (11) are all closed tank bodies; the storage tank (1) and the feed tank (3) are connected via a first connecting pipe, on which a powder flow meter (2) and a first control valve (12) are installed; the feed tank (3) and the acid preparation tank (11) are connected via a discharge pipe, on which a fourth control valve (15) is installed; the high-pressure gas source (8) and the negative pressure system are connected to the feed tank (3) via a second and a third connecting pipe, respectively, on which a second control valve (13) is installed, and on which a third control valve (14) is installed.

2. The electrolyte additive feeding device according to claim 1, characterized in that: The outlet ends of the first connecting pipe, the second connecting pipe and the third connecting pipe are arranged at the top of the feed tank (3).

3. The electrolyte additive feeding device according to claim 2, characterized in that: The discharge pipe is a straight pipe, and the lower end of the straight pipe is located below the liquid level in the acid preparation tank (11).

4. The electrolyte additive feeding device according to claim 2, characterized in that: The discharge pipe is a pneumatic telescopic pipe (10). When the pneumatic telescopic pipe (10) is in a retracted state, the lower end thereof is located above the liquid level in the acid preparation tank (11). When the pneumatic telescopic pipe (10) is in an extended state, the lower end thereof is located below the liquid level in the acid preparation tank (11). The acid preparation tank (11) is provided with a liquid level sensor (9).

5. An electrolyte additive feeding device according to claim 3 or 4, characterized in that: The material of the discharge pipe is corrosion-resistant material.

6. The electrolyte additive feeding device according to claim 5, characterized in that: The corrosion-resistant material is 316 stainless steel.

7. An electrolyte additive feeding device according to any one of claims 1-4 and 6, characterized in that: The negative pressure system is composed of a filter box body (4), a filter (5), a pulse backflush device (6), a fourth connecting pipe, a vacuum pump (7) and a third connecting pipe.

8. The electrolyte additive feeding device according to claim 7, characterized in that: The filter (5) is arranged inside the filter box body (4), and the pulse backflush device (6) and the fourth connecting pipe are arranged on the top of the filter box body (4).

9. The electrolyte additive feeding device according to claim 8, characterized in that: The filter (5) is a dust filter with a filtration accuracy of ≤5 nanometers and is used for separating gas and silicon dioxide. The pulse backflush device (6) performs regular pulse backflush to clean silicon dioxide on the surface of the filter (5) to ensure continuous and stable material absorption.

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