Industrial sulfuric acid circulating pump filter screen cleaning waste acid recovery device

Abstract

The utility model provides a kind of industrial sulphuric acid circulating pump filter screen cleaning waste acid recovery device, including delivery main and buffer tank, the one end of delivery main is connected buffer tank, and the bottom of buffer tank is equipped with recovery pipeline;The other end of delivery main is equipped with collection branch and purging branch, and the collection branch is connected with collection pump, and the inlet of collection pump is connected with hose, and quick coupling for being used to connect the equipment of being washed is equipped on hose;The purging branch is connected with compressed gas source.The utility model is adopted, by hose and collection pump, the discharge generated in cleaning process is sent to delivery main, effectively protects that the relevant machine pump and pipeline facilities of plant area are not corroded damage, reduces the overhaul workload and potential safety hazard;Through purging branch to the delivery main is purged, it is convenient to clean residual waste acid, improves waste acid recovery rate, reduces environmental pollution and delivery main and other equipment corrosion.

Description

Technical Field

[0001] This utility model relates to the field of industrial sulfuric acid circulating pump filter screen cleaning and waste acid treatment technology, specifically to an industrial sulfuric acid circulating pump filter screen cleaning waste acid recovery device. Background Technology

[0002] In industries such as chemical, metallurgical, and pharmaceutical processing, sulfuric acid serves as a crucial reaction medium or catalyst, and its circulation and transportation systems rely on acid-resistant pumps (such as graphite-lined pumps and plastic pumps) for long-term operation. The inlet or outlet filters of these pumps are critical filtration components, playing a vital role in intercepting impurities and protecting the pump body and pipelines. Therefore, these filters are prone to clogging or scaling during prolonged use, requiring regular maintenance and cleaning.

[0003] The existing cleaning process requires depressurizing and purging the pump body and pipelines, then disassembling the filter and cleaning the filter screen. Waste acid generated during the cleaning process is usually discharged directly into a collection pit through a ditch, and then transported to a waste acid recovery unit for treatment. However, the mixing of the discharged acid, clean liquid, and waste alkali liquid in the above process generates a large amount of heat. The increased temperature causes corrosion and damage to the relevant pumps and pipeline facilities near the ditch, resulting in increased maintenance workload and posing safety hazards. Utility Model Content

[0004] To solve at least one of the above technical problems, this utility model provides an industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] This utility model provides an industrial sulfuric acid circulating pump filter screen cleaning waste acid recovery device, including a main conveying pipe and a buffer tank. One end of the main conveying pipe is connected to the buffer tank, and the bottom of the buffer tank is provided with a recovery pipeline. The other end of the main conveying pipe is provided with a collection branch and a purging branch. The collection branch is connected to a collection pump, and the inlet of the collection pump is connected to a hose with a quick connector for connecting to the equipment being cleaned. The purging branch is connected to a compressed air source.

[0007] The beneficial effects of this utility model are:

[0008] This invention utilizes a collection pump, hose, and quick connector installed on the collection branch line to connect various cleaning devices and transport the waste acid generated during the cleaning process to the main conveying pipe. This eliminates the need for drainage ditches and collection pits for waste acid transportation and collection, effectively protecting related pumps and pipeline facilities in the plant area from corrosion damage, reducing maintenance workload and safety hazards. The purging branch line purifies the main conveying pipe, facilitating the removal of residual waste acid, improving waste acid recovery rate, and reducing environmental pollution and corrosion of equipment such as the main conveying pipe. The buffer tank effectively separates and removes gases mixed in with the waste acid, while stabilizing the waste acid at the bottom of the buffer tank, preventing the generation of large amounts of bubbles during subsequent transportation in the recovery pipeline. The waste acid can be stably transported to the waste acid recovery device for direct treatment, improving recovery efficiency.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, a first control valve is also provided on the collection branch.

[0011] The first control valve facilitates the opening and closing of the collection branch, preventing air leakage during purging.

[0012] Furthermore, a second control valve is also provided on the purging branch.

[0013] The second control valve facilitates the opening and closing of the purging branch, preventing leakage during cleaning by the cleaning equipment and making control convenient.

[0014] Furthermore, one end of the main delivery pipe is connected to the middle of the buffer tank.

[0015] When the gas bubbles in the waste acid enter the buffer tank from the middle, the liquid falls under the action of gravity. When the liquid fills the lower space of the buffer tank, it can promote the gas to rise, which facilitates the gas-liquid separation in the buffer tank.

[0016] Furthermore, the top of the buffer tank is provided with an exhaust pipe.

[0017] This facilitates the release of air from the buffer tank.

[0018] Furthermore, a third control valve is also provided at one end of the main delivery pipe.

[0019] The third control valve allows for easy control of the opening and closing of one end of the main delivery pipe. After the main delivery pipe has finished delivering the acid, the third control valve can be closed when the level in the buffer tank is high to prevent waste acid in the buffer tank from flowing back into the main delivery pipe.

[0020] Furthermore, a fourth control valve is provided at the bottom of the buffer tank, and the recovery pipeline is connected to the fourth control valve.

[0021] When there are many bubbles at the bottom of the buffer tank, the fourth control valve can be closed to increase the buffer time in the waste acid buffer tank, allowing the bubbles to fully break and the gas to be fully separated. Then the fourth control valve can be opened to allow the stable waste acid liquid to enter the recovery pipeline, thereby improving the stability of the waste acid during transportation in the recovery pipeline.

[0022] Furthermore, the recovery pipeline is also equipped with a discharge branch, and a fifth control valve is installed on the discharge branch.

[0023] The recovery pipeline can be connected to the discharge ditch. When the concentration of waste acid is low enough to be discharged directly, the fifth control valve is opened, and the waste acid is discharged directly through the discharge branch, which has high treatment efficiency and reduces treatment costs.

[0024] Furthermore, it also includes boundary pipelines, one end of which is connected to the middle of the main transmission pipeline, and boundary valves are installed on the boundary pipelines.

[0025] It facilitates the recycling and transportation of waste acid from other areas, improves equipment utilization, and reduces the overall operating cost of the plant.

[0026] Furthermore, the collecting pump is a diaphragm pump.

[0027] This design helps prevent waste acid from corroding the internal structure of the collection pump, thus extending the pump's service life. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] Figure 2 This is a schematic diagram of the structure of the hose of this utility model connecting to another cleaning device.

[0030] In the accompanying drawings, the technical features represented by each reference numeral are as follows:

[0031] 1-Main delivery pipe; 2-Buffer tank; 3-Collection branch; 4-Purge branch; 5-Collection pump; 6-Hose; 7-Recovery pipeline; 8-First control valve; 9-Second control valve; 10-Third control valve; 11-Fourth control valve; 12-Discharge branch; 13-Fifth control valve; 14-Boundary zone pipeline; 15-Boundary zone valve; 16-Exhaust pipe;

[0032] 20 - Equipment to be cleaned. Detailed Implementation

[0033] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0034] This utility model refers to Figure 1-2 .

[0035] This utility model provides an industrial sulfuric acid circulating pump filter screen cleaning waste acid recovery device, including a main conveying pipe 1 and a buffer tank 2. One end of the main conveying pipe 1 is connected to the buffer tank 2, and the bottom of the buffer tank 2 is provided with a recovery pipeline 7. The other end of the main conveying pipe 1 is provided with a collection branch 3 and a purging branch 4. The collection branch 3 is connected to a collection pump 5, and the inlet of the collection pump 5 is connected to a hose 6. The hose 6 is provided with a quick connector for connecting to the equipment 20 to be cleaned. The purging branch 4 is connected to a compressed air source.

[0036] Working principle:

[0037] The equipment being cleaned, 20, is the aforementioned industrial sulfuric acid circulating pump or its filter. Quick coupling is a common name for existing technology products used for detachable flexible connections between pipes.

[0038] When the filter of an industrial sulfuric acid circulating pump is clogged or scaled and needs maintenance and cleaning, first connect the quick connector to the industrial sulfuric acid circulating pump or its filter. Depending on the type of industrial sulfuric acid circulating pump or its filter, if the liquid flows out from its inlet during depressurization, venting, and cleaning, connect the quick connector to its outlet; if the liquid flows out from its inlet during depressurization, venting, and cleaning, connect the quick connector to its inlet. Then, the operator can begin depressurizing, venting, and cleaning the equipment 20 being cleaned. The resulting waste acid flows through the hose 6 to the collection pump 5, which then transports the waste acid through the collection branch 3 to the main delivery pipe 1. After cleaning, connect the quick connector to another equipment 20 being cleaned and begin depressurizing, venting, and cleaning that other equipment 20. During the above cleaning process, the waste acid flows along the main delivery pipe 1 to the buffer tank 2, where any entrained gases such as bubbles are separated. Finally, the waste acid flows out from the bottom of the buffer tank 2 and can be transported along the recovery pipeline 7 to the waste acid recovery device for processing and recycling. After cleaning, the collection branch 3 is closed and the purging branch 4 is opened. Compressed gas enters the main delivery pipe 1 through the purging branch 4, purging the residual waste acid in the main delivery pipe 1 into the buffer tank 2. After gas-liquid separation, the waste acid flows out from the bottom of the buffer tank 2.

[0039] The technical problem solved by this utility model exists in the transportation process of waste acid before it enters the waste acid recovery device. The waste acid recovery device is an external, existing complete set of equipment, and its waste acid recovery and treatment process is unrelated to the technical problem solved by this utility model.

[0040] In summary, this utility model, by installing a collection pump 5, a hose 6, and a quick connector on the collection branch 3, can connect each piece of equipment 20 being cleaned and discharge the waste acid generated during the cleaning process to the main conveying pipe 1. This eliminates the need for drainage ditches and collection pits for waste acid discharge and collection, effectively protecting the relevant pumps and pipeline facilities in the plant area from corrosion damage, reducing maintenance workload and safety hazards. The purging branch 4 purifies the main conveying pipe 1, facilitating the removal of residual waste acid, improving the waste acid recovery rate, and reducing environmental pollution and corrosion of equipment such as the main conveying pipe 1. The buffer tank 2 effectively separates and removes gases mixed in with the waste acid, while stabilizing the state of the waste acid at the bottom of the buffer tank 2, preventing the generation of a large number of bubbles during the subsequent transportation of the waste acid in the recovery pipeline 7. The waste acid can be stably transported to the waste acid recovery device and directly processed, improving the recovery efficiency.

[0041] Furthermore, a first control valve 8 is also provided on the collection branch 3.

[0042] Preferably, the first control valve 8 is a butterfly valve.

[0043] The first control valve 8 facilitates the opening and closing of the collection branch 3, preventing air leakage from the collection branch 3 during purging.

[0044] Furthermore, a second control valve 9 is also provided on the purging branch 4.

[0045] Preferably, the second control valve 9 is a gate valve.

[0046] The second control valve 9 facilitates the opening and closing of the purging branch 4, preventing leakage of liquid from the purging branch 4 during cleaning by the cleaning equipment 20, and making control convenient.

[0047] Furthermore, one end of the main conveying pipe 1 is connected to the middle of the buffer tank 2.

[0048] When the bubbles in the waste acid enter the buffer tank 2 from the middle, the liquid falls under the action of gravity. When the liquid fills the lower space of the buffer tank 2, it can promote the gas to rise, which facilitates the gas-liquid separation in the buffer tank 2.

[0049] Furthermore, the top of the buffer tank 2 is provided with an exhaust pipe 16.

[0050] This facilitates the release of air from the buffer tank 2.

[0051] Furthermore, a third control valve 10 is provided at one end of the main conveying pipe 1.

[0052] Preferably, the third control valve 10 is a gate valve.

[0053] The third control valve 10 facilitates the control of the opening and closing of one end of the main delivery pipe 1. After the main delivery pipe 1 has finished delivering, when the liquid level in the buffer tank 2 is high, the third control valve 10 can be closed to prevent the waste acid in the buffer tank 2 from flowing back into the main delivery pipe 1.

[0054] Furthermore, a fourth control valve 11 is provided at the bottom of the buffer tank 2, and the recovery pipeline 7 is connected to the fourth control valve 11.

[0055] Preferably, the fourth control valve 11 is a gate valve.

[0056] When there are many bubbles at the bottom of the buffer tank 2, the fourth control valve 11 can be closed to increase the buffer time in the waste acid buffer tank 2, allowing the bubbles to fully break and the gas to be fully separated. Then the fourth control valve 11 can be opened to allow the stable waste acid liquid to enter the recovery pipeline 7, thereby improving the stability of the waste acid during transportation in the recovery pipeline 7.

[0057] Furthermore, the recovery pipeline 7 is also provided with a discharge branch 12, and the discharge branch 12 is provided with a fifth control valve 13.

[0058] Preferably, the discharge branch 12 has at least two branches. The fifth control valve 13 is a gate valve.

[0059] The recovery pipeline 7 can be connected to the discharge ditch. When the concentration of waste acid is low enough to be discharged directly, the fifth control valve 13 is opened, and the waste acid is discharged directly through the discharge branch 12. This process is efficient and reduces the cost of treatment.

[0060] Furthermore, it also includes a boundary pipeline 14, one end of which is connected to the middle of the main transmission pipeline 1, and a boundary valve 15 is provided on the boundary pipeline 14.

[0061] Note: The other end of boundary pipe 14 can be connected to equipment in other external boundaries, such as storage boundaries. Under normal circumstances, boundary valve 15 is closed; when waste acid is generated in other boundaries, boundary pipe 14 can be used to lead the waste acid from other boundaries to the main delivery pipe 1.

[0062] Preferably, the boundary valve 15 is a gate valve.

[0063] It facilitates the recycling and transportation of waste acid from other areas, improves equipment utilization, and reduces the overall operating cost of the plant.

[0064] Furthermore, the collecting pump 5 is a diaphragm pump.

[0065] This design helps prevent waste acid from corroding the internal structure of the collection pump 5, thus extending the service life of the collection pump 5.

[0066] In the description of this utility model, it should be understood that if descriptive terms indicating orientation, direction, or positional relationship appear, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of understanding this utility model and simplifying the description, and does not indicate or imply that the part, element, or whole referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0067] Furthermore, if sequential descriptive terms such as "first," "second," etc., appear, their purpose in this specification is for ease of understanding or simplification. For example, to distinguish multiple technical features of the same type or function, which must be mentioned separately, this specification may use prefixes or suffixes to differentiate them. Therefore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this utility model, if descriptive terms describing structural relationships are used, such as "installation," "connection," "joining," and "fixing," they should be interpreted broadly unless otherwise explicitly specified and limited. For example, "installation," "connection," and "joining" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. "Fixing" can refer to an integral fixation or a detachable fixation using fasteners; it can be a direct fixation or a fixation through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0069] In this utility model, if descriptive terms containing subordinate or connecting meanings appear, such as "above" or "below" the second feature, they should not be interpreted restrictively unless otherwise explicitly specified and limited. For example, "above" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood according to the specific circumstances, the context, and the coherence of the preceding and following text.

[0070] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments, examples, and features described in this specification, and such combinations or integrations should all fall within the scope of the present invention.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and modifications made by those skilled in the art to the above embodiments within the scope of information available through public channels and in conjunction with the technical teachings given in this application are still covered within the protection scope of this application.

Claims

1. A waste acid recovery device for cleaning the filter screen of an industrial sulfuric acid circulating pump, characterized in that: It includes a main delivery pipe (1) and a buffer tank (2). One end of the main delivery pipe (1) is connected to the buffer tank (2), and the bottom of the buffer tank (2) is provided with a recovery pipe (7). The other end of the main delivery pipe (1) is provided with a collection branch (3) and a purging branch (4). The collection branch (3) is connected to a collection pump (5), and the inlet of the collection pump (5) is connected to a hose (6). The hose (6) is provided with a quick connector that can be used to connect to the equipment (20) being cleaned. The purging branch (4) is connected to a compressed air source.

2. The industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device according to claim 1, characterized in that: The collection branch (3) is also equipped with a first control valve (8).

3. The industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device according to claim 1, characterized in that: The purging branch (4) is also equipped with a second control valve (9).

4. The industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device according to claim 1, characterized in that: One end of the main delivery pipe (1) is connected to the middle of the buffer tank (2).

5. The industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device according to claim 1, characterized in that: The top of the buffer tank (2) is provided with an exhaust pipe (16).

6. The industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device according to claim 5, characterized in that: A third control valve (10) is also provided at one end of the main delivery pipe (1).

7. The industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device according to claim 5, characterized in that: The bottom of the buffer tank (2) is also provided with a fourth control valve (11), and the recovery pipeline (7) is connected to the fourth control valve (11).

8. The industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device according to claim 1, characterized in that: The recovery pipeline (7) is also provided with a discharge branch (12), and a fifth control valve (13) is provided on the discharge branch (12).

9. The industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device according to claim 1, characterized in that: It also includes a boundary pipeline (14), one end of which is connected to the middle of the main pipeline (1), and a boundary valve (15) is provided on the boundary pipeline (14).

10. The industrial sulfuric acid circulating pump filter screen cleaning and waste acid recovery device according to any one of claims 1-9, characterized in that: The collecting pump (5) is a diaphragm pump.

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