A closed discharge device for solvent transfer drums

Abstract

The utility model is suitable for the technical field of chemical material storage and transfer, provides a kind of closed discharge device of solvent into ton barrel, comprising: solvent discharge inner tube, for a DN25 straight pipe, its inlet end is used to be connected to solvent storage tank outlet by quick coupler, its outlet end is bevelled, extend to the inside of ton barrel to be filled and keep a certain distance with barrel bottom;Nitrogen pipeline, for a DN15 pipeline, it is vertically connected on the solvent discharge inner tube by a tee joint, inlet end is connected nitrogen source, for by solvent discharge inner tube into inert nitrogen into ton barrel;The utility model is formed by tail gas jacket pipe and tail gas pipeline closed system, the combustible gas volatilized during filling process is completely collected and exported, completely eliminates the risk of combustion and explosion caused by solvent volatilization in operation area.Simultaneously, nitrogen inertization function can replace the air in ton barrel and pipeline, form inert environment, further guarantee safety, especially suitable for easy oxidizing solvent.

Description

Technical Field

[0001] This utility model belongs to the field of chemical material storage and transfer technology, and in particular relates to a closed discharge device for solvent entering a ton container. Background Technology

[0002] In the production and operation processes of industries such as chemicals and pharmaceuticals, it is often necessary to transfer liquid solvents from large storage tanks into bulk containers for subsequent transportation or temporary storage. Traditional solvent transfer methods mostly employ open or semi-open operation modes, where the solvent is directly discharged into the inlet of the bulk container via a hose. However, this traditional transfer method has many significant drawbacks, posing considerable hidden dangers and adverse effects to production operations: 1. Significant safety hazards: Solvents are prone to volatilization and produce flammable gases during the dispensing process. When these gases mix with air, they can easily form an explosive environment. Once they come into contact with static electricity or open flames, they may cause a fire or explosion accident, which seriously threatens production safety and the safety of personnel.

[0003] 2. Severe environmental pollution: Volatile organic compounds (VOCs) produced will directly escape into the workshop air, which will not only pollute the workshop environment, but also harm the health of on-site operators. At the same time, these pollutants will also exacerbate the air pollution problem when they are emitted into the atmosphere.

[0004] 3. Significant material loss: The evaporation of solvents leads to intangible material losses, which, over time, increase production costs and reduce economic benefits for enterprises.

[0005] 4. Impact on product quality: For solvents that are easily oxidized, during open or semi-open dispensing processes, oxygen in the air inside the container will react with the solvent, thereby affecting the product quality of the solvent and making it unsuitable for subsequent production and use.

[0006] Currently, while some closed-loop conveying equipment exists on the market, these devices generally suffer from complex structures, high manufacturing costs, and limited applicability, making them difficult to widely promote and apply in industries such as chemicals and pharmaceuticals. Therefore, developing a closed-loop solvent discharge device for ton containers that is simple in structure, low in cost, easy to operate, and effectively solves safety, environmental, and material loss issues has become an urgent need in the industry. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of traditional solvent dispensing methods in the prior art, such as significant safety hazards, serious environmental pollution, high material loss, and complex structure, high cost, and poor applicability of existing closed conveying equipment. It provides a closed discharge device for solvent entering ton containers that is simple in structure, easy to operate, and low in cost, and can realize closed solvent filling, inerting protection, and tail gas recovery functions, so as to meet the needs of chemical, pharmaceutical and other industries for safe, environmentally friendly and efficient solvent dispensing.

[0008] This invention is achieved as follows: a closed-loop discharge device for solvent entering a ton container, comprising: The solvent discharge inner pipe is a straight pipe of DN25. Its inlet end is used to connect to the solvent storage tank outlet through a quick-connect fitting, and its outlet end is a beveled cut, extending into the inside of the ton to be filled and maintaining a certain distance from the bottom of the ton. The nitrogen pipeline is a DN15 pipeline, which is vertically connected to the solvent discharge inner pipe via a tee connector. The inlet end is connected to a nitrogen source for introducing inert nitrogen into the ton container through the solvent discharge inner pipe. The exhaust gas jacket outer tube is a DN80 sleeve, coaxially sleeved outside the solvent discharge inner tube. The upper end of the exhaust gas jacket outer tube is closed and the lower end is open. An annular exhaust gas collection channel is formed between the exhaust gas jacket outer tube and the inner solvent discharge inner tube. The exhaust gas pipe is a DN25 pipe that is connected to the side wall of the outer pipe of the exhaust gas jacket and communicates with the exhaust gas collection channel, and is used to export the exhaust gas to the plant exhaust gas treatment system. The ton container lid connection structure has an upper part connected to the lower end of the exhaust gas jacket outer pipe via a chuck clamp, and an lower part with an external thread for mating with the standard internal thread on the ton container lid to achieve a sealed connection.

[0009] Preferably, a DN25 first quick-connect ball valve is provided on the inlet end of the solvent discharge inner pipe to control the flow and shut-off of the solvent.

[0010] Preferably, the inlet end of the nitrogen pipeline is provided with a second quick-release ball valve of DN15 for controlling the introduction and closure of nitrogen.

[0011] Preferably, the outlet end of the exhaust gas pipeline is provided with a DN25 third quick-release ball valve for controlling the collection and shut-off of exhaust gas.

[0012] Preferably, the ton barrel lid connection structure is a section of DN40 threaded pipe, and a DN40 chuck clamp is provided at the upper part of the threaded pipe.

[0013] Preferably, the lower part of the exhaust jacket outer pipe is provided with a DN40 hollow pipe, and the lower part of the hollow pipe is provided with a chuck that is compatible with the upper part of the threaded pipe. The chuck clamps the hollow pipe and the chuck of the threaded pipe.

[0014] Preferably, a sealing ring is placed between the chuck of the hollow tube and the threaded pipe, and the chuck clamps together to seal the connection.

[0015] Preferably, the lowest point of the oblique cut at the outlet end of the solvent discharge inner pipe is 50mm away from the bottom of the ton container.

[0016] Compared with related technologies, the closed discharge device for solvent entering a ton container provided by this utility model has the following advantages: 1. This utility model forms a closed system through the exhaust gas jacket and exhaust gas pipeline, which completely collects and exhausts the flammable gases volatilized during the filling process, thus completely eliminating the risk of combustion and explosion caused by solvent evaporation in the work area. At the same time, the nitrogen inerting function can replace the air in the ton container and pipeline to form an inert environment, further ensuring safety, especially suitable for easily oxidized solvents; 2. The bottom of the inner tube of this utility model is cut at an angle and is 50mm away from the bottom of the barrel, which effectively reduces the risk of static electricity accumulation caused by liquid flow impact during filling and further improves the intrinsic safety level. 3. This utility model achieves zero VOCs emission, effectively protects the workshop environment, avoids air pollution, safeguards the health of operators, and meets strict environmental protection regulations. 4. The sealed environment of this invention avoids solvent evaporation, reduces intangible material losses, and lowers production costs; 5. This utility model adopts an innovative design similar to a jacketed pipe, which has a compact structure and utilizes mature pipe, valve and quick-connect coupling technology. Its manufacturing and maintenance costs are far lower than those of complex fully automatic filling systems, making it easy to promote and use in the industry. The entire operation process can be completed with just three quick-connect ball valves, which is quick to connect and greatly improves the efficiency of the dispensing operation. 7. The connection structure of the ton container lid of this utility model is connected to the upper outer pipe by a clamp. When the ton container lid is screwed in, the upper device can remain stationary, avoiding the problem of pipe entanglement caused by the rotation of the entire device, making the operation more convenient and reliable. 8. The hollow design at the lower end of the outer tube of this utility model greatly reduces the resistance to the flow of exhaust gas, ensuring that the exhaust gas can be smoothly drawn into the treatment system and preventing local pressure buildup. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a closed discharge device for solvent entering a ton container, as proposed in this utility model. Figure 2 This is a schematic diagram showing the disassembly structure of a closed discharge device for solvent entering a ton container, as proposed in this utility model. Figure 3 This is a schematic diagram of the solvent discharge inner pipe structure proposed in this utility model; Figure 4 This is a schematic diagram of the exhaust gas jacket outer pipe structure proposed in this utility model; Figure 5 This is a schematic diagram of the threaded pipe structure proposed in this utility model.

[0018] In the diagram: 1. Solvent discharge inner pipe; 2. First quick-connect ball valve; 3. T-connector; 4. Nitrogen pipeline; 5. Second quick-connect ball valve; 6. Tail gas jacket outer pipe; 7. Tail gas pipeline; 8. Third quick-connect ball valve; 9. Threaded pipeline; 10. Chuck clamp; 11. Hollowed-out pipe; 12. Beveled cut. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1-5 As shown, the core design of this utility model's closed-loop discharge device for solvent entering a ton container lies in its concentric sleeve structure with an inner pipe for liquid discharge and an outer pipe for air discharge. The specific specifications, connection methods, and functions of each component are as follows: Solvent discharge inner pipe 1: A DN25 stainless steel pipe serves as the core flow channel for solvent transportation. Its inlet end connects to the solvent storage tank outlet via a quick-connect coupling for rapid connection. A DN25 first quick-connect ball valve 2 is installed on the inlet end of the pipe, allowing for flexible control of solvent flow to meet the needs of different filling stages. The outlet end of the solvent discharge inner pipe 1 extends into the ton container and is machined with a beveled cut 12. After the device is installed, the lowest point of this beveled cut 12 is strictly maintained at a distance of 50mm from the bottom of the ton container to achieve anti-static function and reduce the risk of static electricity accumulation.

[0021] Nitrogen pipeline 4: A DN15 stainless steel pipe is selected and vertically welded to the solvent discharge inner pipe 1 via a tee joint 3 to form a nitrogen delivery branch. A DN15 second quick-release ball valve 5 is installed at the inlet end of nitrogen pipeline 4 to control the introduction and cut-off of nitrogen; the inlet end is connected to an external nitrogen source, and nitrogen can be introduced into the system by opening the ball valve when inerting treatment is required.

[0022] The outer tube 6 of the exhaust gas jacket is made of DN80 stainless steel and is coaxially installed outside the inner tube 1 of the solvent discharge pipe, forming an annular exhaust gas collection channel to collect the exhaust gas volatilized during solvent filling. The upper end of the outer tube 6 is sealed with a welded end cap to prevent exhaust gas from escaping from the top; the lower end is provided with a perforated tube 11, which allows gas in the ton container to easily enter the exhaust gas collection channel. The exhaust gas pipe 7 is a DN25 stainless steel pipe, welded to the side of the outer tube 6 and connected to the exhaust gas collection channel, used to discharge the collected exhaust gas; a DN25 third quick-release ball valve 8 is installed at the outlet end of the exhaust gas pipe 7 to control the collection and closure of the exhaust gas, and the outlet end is connected to the plant exhaust gas system to achieve centralized treatment of the exhaust gas.

[0023] Ton container lid connection structure: This structure consists of a DN40 threaded pipe 9 with external threads. The external thread specification of the threaded pipe 9 matches the internal thread of the standard ton container lid, ensuring a tight fit. The upper end of the threaded pipe 9 is connected to the lower end of the hollowed-out pipe 11 of the exhaust jacket outer pipe 6 via a DN40 chuck clamp 10. Specifically, the lower part of the hollowed-out pipe 11 has a chuck that matches the upper part of the threaded pipe 9. The chuck clamp 10 clamps the hollowed-out pipe 11 and the threaded pipe 9, and a sealing ring is placed between the hollowed-out pipe 11 and the chuck of the threaded pipe 9, and clamped and sealed by the chuck clamp 10. This connection method allows the threaded pipe 9 to be screwed into the ton container lid simply by rotating the threaded pipe 9. The main body of the device above (including the solvent discharge inner pipe 1, nitrogen pipe 4, exhaust jacket outer pipe 6, and exhaust pipe 7, etc.) can remain fixed, effectively preventing problems such as entanglement of the pipes due to twisting. The operation is labor-saving and safe and reliable.

[0024] The working principle of this device is to transport solvent through an inner tube, collect volatile exhaust gas through an outer tube, and combine this with nitrogen inerting treatment to achieve a closed, safe, and environmentally friendly solvent filling process. The specific operation process is as follows: 1. Device Connection: First, connect the inlet end of the solvent discharge inner pipe 1 to the outlet end of the solvent storage tank via a connector, ensuring a tight connection and no solvent leakage. Next, connect the outlet end of the exhaust gas pipe 7 to the exhaust gas main pipe of the plant via a connector, ensuring that the exhaust gas can be smoothly introduced into the exhaust gas treatment system. Then, screw the threaded pipe 9 connecting the ton container lid into the threaded hole of the ton container lid that has been placed in place, and tighten it firmly to achieve a sealed connection between the threaded pipe 9 and the ton container lid. Finally, use the chuck clamp 10 to securely connect the upper end of the threaded pipe 9 to the perforated pipe 11 at the lower end of the exhaust gas jacket outer pipe 6, thereby forming a completely sealed channel from the inside of the ton container to the exhaust gas main pipe, preparing for subsequent sealed filling.

[0025] 2. Nitrogen Inerting Treatment: Before solvent filling, the system needs to be inerted with nitrogen to remove air and reduce the risk of combustion and explosion. During operation, first close the first quick-release ball valve 2 to prevent solvent from flowing into the ton container during inerting. Then open the third quick-release ball valve 8 and the second quick-release ball valve 5, allowing nitrogen from the nitrogen source to enter the solvent discharge inner pipe 1 through the nitrogen pipe 4. A portion of the nitrogen entering the inner pipe flows downwards to the bottom of the ton container, gradually displacing the air from bottom to top. The displaced gases (mainly air, nitrogen, and a small amount of potentially volatile solvent gases) enter the annular tail gas collection channel through the perforated pipe 11 at the lower end of the tail gas jacket outer pipe 6. Then, under the suction of the tail gas system, they are pumped from the tail gas pipe 7 to the plant's tail gas treatment system for processing. Typically, the nitrogen introduction time is approximately 5 minutes to ensure that the air in the system is fully replaced and the inerting effect meets the standards. After inerting is complete, close the second quick-release ball valve 5 to stop the nitrogen introduction.

[0026] 3. Solvent Discharge and Filling: Keep the third quick-release ball valve 8 open to collect volatile exhaust gases during the filling process. Then, slowly open the first quick-release ball valve 2 to allow the solvent in the solvent storage tank to slowly flow into the bottom of the ton container along the solvent discharge inner pipe 1. During the solvent filling process, as the liquid level in the ton container rises, the gas in the upper space of the ton container (mainly volatile solvent vapor and a small amount of residual nitrogen) is gradually compressed. This gas enters the exhaust gas collection channel through the perforated pipe 11 at the lower end of the exhaust gas jacket outer pipe 6, and is then pumped to the exhaust gas treatment system through the exhaust gas pipeline 7, achieving a completely closed, non-volatile emission process and effectively avoiding safety hazards and environmental pollution caused by solvent evaporation.

[0027] 4. Filling Completion and Device Disassembly: When the solvent in the ton container is nearly full (this can be determined by the liquid level observation window or other liquid level detection methods), first close the first quick-release ball valve 2 to stop solvent delivery. After the remaining volatile exhaust gas in the ton container has been largely collected, close the second quick-release ball valve 8 to end exhaust gas collection. Finally, loosen the chuck clamp 10 and remove the entire device (including the solvent discharge inner pipe 1, nitrogen pipe 4, exhaust gas jacket outer pipe 6, exhaust gas pipe 7, and ton container lid connection structure, etc.) from the ton container lid. This completes one solvent dispensing operation. For subsequent dispensing operations, simply reconnect the device, perform inerting treatment, and refill with solvent following the above steps.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A closed discharge device for solvent entering a ton container, characterized in that, include: The solvent discharge inner pipe (1) is a straight pipe of DN25. Its inlet end is used to connect to the solvent storage tank outlet through a quick-connect fitting. Its outlet end is a beveled cut (12) that extends into the ton to be filled and maintains a certain distance from the bottom of the ton. The nitrogen pipeline (4) is a DN15 pipeline, which is vertically connected to the solvent discharge inner pipe (1) through a tee connector (3). The inlet end is connected to a nitrogen source for introducing inert nitrogen into the ton container through the solvent discharge inner pipe (1). The exhaust gas jacket outer tube (6) is a DN80 sleeve, which is coaxially sleeved outside the solvent discharge inner tube (1). The upper end of the exhaust gas jacket outer tube (6) is closed and the lower end is open. An annular exhaust gas collection channel is formed between the exhaust gas jacket outer tube (6) and the internal solvent discharge inner tube (1). The exhaust gas pipe (7) is a DN25 pipe, which is connected to the side wall of the exhaust gas jacket outer pipe (6) and communicates with the exhaust gas collection channel, and is used to export the exhaust gas to the plant exhaust gas treatment system. The ton barrel lid connection structure has its upper part connected to the lower end of the exhaust gas jacket outer pipe (6) via a chuck clamp (10), and its lower part is provided with an external thread for matching with the standard internal thread on the ton barrel lid to achieve a sealed connection.

2. The closed discharge device for solvent entering a ton container as described in claim 1, characterized in that, The solvent discharge inner pipe (1) is equipped with a DN25 first quick-install ball valve (2) on the inlet end pipe, which is used to control the flow and shut-off of the solvent.

3. The closed discharge device for solvent entering a ton container as described in claim 1, characterized in that, The inlet end of the nitrogen pipeline (4) is equipped with a second quick-release ball valve (5) of DN15, which is used to control the introduction and closure of nitrogen.

4. The closed discharge device for solvent entering a ton container as described in claim 1, characterized in that, The outlet end of the exhaust gas pipe (7) is equipped with a DN25 third quick-release ball valve (8) for controlling the collection and shut-off of exhaust gas.

5. The closed discharge device for solvent entering a ton container as described in claim 1, characterized in that, The ton barrel lid connection structure is a section of DN40 threaded pipe (9), and a DN40 chuck clamp (10) is provided on the upper part of the threaded pipe (9).

6. The closed discharge device for solvent entering a ton container as described in claim 5, characterized in that, The lower part of the exhaust jacket outer pipe (6) is provided with a DN40 hollow pipe (11). The lower part of the hollow pipe (11) is provided with a chuck that is compatible with the upper part of the threaded pipe (9). The chuck clamp (10) is fitted around the chuck of the hollow pipe (11) and the threaded pipe (9).

7. A closed discharge device for solvent entering a ton container as described in claim 6, characterized in that, A sealing ring is placed between the chuck of the hollow tube (11) and the threaded pipe (9) and clamped and sealed by the chuck clamp (10).

8. The closed discharge device for solvent entering a ton container as described in claim 1, characterized in that, The lowest point of the oblique cut (12) at the outlet end of the solvent discharge inner pipe (1) is 50mm away from the bottom of the ton container.

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