NMP barreled material vacuum pumping system

Abstract

The utility model relates to the technical field of NMP conveying and storage, and discloses an NMP barreled material vacuum pumping system which comprises an NMP packaging barrel used for containing an NMP solvent, a pumping gun used for pumping the NMP solvent in the NMP packaging barrel, and a temporary storage tank used for temporarily storing the NMP solvent fed by the pumping gun. A plurality of NMP packaging barrels are arranged, a plurality of material pumping guns are arranged, and discharge ports of the plurality of material pumping guns are respectively communicated with a feed port of the multi-channel valve through metal hoses; a feed port of the temporary storage tank is communicated with a material header pipe connected with a discharge port of the multi-channel valve, and the temporary storage tank is also connected with a vacuum pump. One vacuum pump serves multiple material pumping points at the same time, the material pumping efficiency is remarkably improved, and the problem that in the prior art, each barrel needs one pump, and the efficiency is low is solved. Due to the fact that the vacuum material pumping system can generate stable negative pressure, materials can completely move in the pipeline, material residues are reduced, and material waste and pollution caused by the residues are effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to NMP conveying and storage technical field, concretely relates to a kind of NMP barrel charge vacuum pumping system. BACKGROUND

[0002] In chemical, pharmaceutical and other industries, N-methyl pyrrolidone (NMP) as a commonly used organic solvent, its barrel charge pumping process is an important link in production. XNMP packaging barrel has three, respectively 200LPE barrel, 200L galvanized barrel, 1000LHDPE barrel, traditional NMP barrel charge pumping system usually relies on mechanical pump or diaphragm pump, these pumps move material by physical pressure difference, from packaging barrel NMP is pumped to storage or processing container.

[0003] As Figure 1 The existing technology pumping process shown in Figure, NMP barrel charge pumping method is to use diaphragm pump, diaphragm pump is driven by 0.6MPa compressed air, each packaging barrel is equipped with a pump, NMP is transported to temporary storage tank by metal hose, and is fed to raw material storage tank by material transfer pump. This way, each packaging barrel needs an independent diaphragm pump for pumping, resulting in complex operation, low efficiency, and during pumping, diaphragm pump may leave a certain amount of material residue in the pipeline, resulting in material residue, which not only wastes raw materials, but also may pollute the environment. Due to the working principle of pump, air entrainment cannot be completely avoided, which may cause material waste and pollution.

[0004] In view of this, we propose a kind of NMP barrel charge vacuum pumping system, which overcomes the defects of the prior art in the following aspects: a set of vacuum system is used instead of multiple diaphragm pumps, pumping efficiency is improved, and operation process is simplified. The vacuum pumping system can more completely pump out the material in the packaging barrel and pipeline, reducing material residue and waste. The system design considers the safety and convenience of operation, reduces the operation intensity and error risk. Through the design of vacuum pump and gas phase pipeline, direct discharge of gas phase material is reduced, and the impact on the environment is reduced. UTILITY MODEL CONTENTS

[0005] The present application aims to solve the above-mentioned technical problems in the prior art, in which the received barrel NMP is connected to the diaphragm pump by metal hose, the diaphragm pump is driven by 0.6MPa compressed air, and the NMP in the packaging barrel is transported to the temporary storage tank. Since only one pump can correspond to one barrel, the efficiency is low, and since the diaphragm pump has limited pumping capacity, the material remaining in the pipeline cannot be completely pumped out, causing pollution and waste.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a kind of NMP barrel charge vacuum extraction system, including NMP packaging barrel for containing NMP solvent, extraction gun for extracting NMP solvent in NMP packaging barrel, temporary storage tank for temporarily storing NMP solvent by extraction gun feeding;

[0008] NMP packaging barrel is provided with several, extraction gun is equipped with several and the outlet of several extraction gun is respectively connected with the inlet of multi-channel valve by metal hose;The inlet of temporary storage tank is connected with the material main pipe connected with the outlet of multi-channel valve, and the temporary storage tank is also connected with vacuum pump.

[0009] As preferred, the inlet and outlet port screw seal cover on NMP packaging barrel is connected with sealing cover, and the extraction gun is inserted into NMP packaging barrel by screwing the sealing cover and inserting the extraction gun from the inlet and outlet port of NMP packaging barrel.

[0010] As preferred, the top of temporary storage tank is provided with gas phase pipeline, the gas outlet of gas phase pipeline is connected with the gas inlet of vacuum pump, and the gas outlet of vacuum pump is connected with tail gas main pipe.

[0011] As preferred, the outlet pipeline provided at the bottom of temporary storage tank is connected with the inlet of material transfer pump, and the material feeding pipeline connected with the outlet of material transfer pump feeds material to raw material storage tank.

[0012] Compared with prior art, the technical effects and advantages of the utility model are:

[0013] The NMP barrel charge vacuum extraction system utilizes vacuum pump to generate negative pressure in temporary storage tank, forming pressure difference between NMP packaging barrel. When the operator inserts extraction gun into the bottom of packaging barrel and opens it, the negative pressure in temporary storage tank makes NMP solvent in packaging barrel pushed by atmospheric pressure, which is sucked into temporary storage tank through extraction gun, metal hose and material main pipe. Subsequently, the material in temporary storage tank is transported to raw material storage tank by material transfer pump. This process realizes synchronous operation of multiple extraction points through central vacuum pump and multiple control valves, improving the efficiency of extraction.

[0014] Compared with prior art, the system simultaneously serves multiple extraction points through a set of vacuum pump, significantly improving the extraction efficiency and solving the low efficiency problem of original pump for each barrel. In addition, since vacuum extraction system can generate stable negative pressure, material can be completely moved in pipeline, reducing material residue, effectively avoiding waste and pollution caused by residue, thereby saving cost and reducing environmental impact.

[0015] The system also improves the safety and convenience of operation through optimized design. The threaded sealing cover on the NMP packaging barrel is designed so that the operator can easily screw open the sealing cover and insert the material extraction gun, which not only ensures the sealing and safety of the material extraction process, but also reduces the operating strength. At the same time, the gas phase pipeline at the top of the temporary storage tank is connected to the gas inlet of the vacuum pump, which helps to maintain the vacuum degree in the temporary storage tank, and the tail gas is further treated or discharged through the tail gas main pipe, reducing the direct discharge impact on the environment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a prior art NMP material extraction flowchart;

[0017] Figure 2 is a structural schematic diagram of the present application;

[0018] Figure 3 is a state diagram of the present application Figure 2 after the NMP packaging barrel is removed.

[0019] In the figure: 1, NMP packaging barrel; 2, material extraction gun; 3, metal hose; 4, multi-channel valve; 5, temporary storage tank; 6, material main pipe; 7, inlet and outlet; 8, sealing cover; 9, gas phase pipeline; 10, vacuum pump; 11, tail gas main pipe; 12, discharge pipeline; 13, material transfer pump; 14, feeding pipeline; 15, raw material storage tank. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] The following will be described in detail with reference to the drawings in the embodiments of the present application, Figures 2-3 The present application will be further described in detail,

[0022] The embodiments of the present application disclose an NMP barrel charging vacuum material extraction system, which comprises an NMP packaging barrel 1 for containing NMP solvent, a material extraction gun 2 for extracting NMP solvent in the NMP packaging barrel 1, and a temporary storage tank 5 for temporarily storing NMP solvent fed by the material extraction gun 2.

[0023] The NMP packaging barrels 1 are provided in plurality, the suction guns 2 are provided in plurality, and the discharge outlets of the plurality of suction guns 2 are respectively connected to the inlet ports of the multi-channel valve 4 through the metal hoses 3. The threaded sealing covers of the inlet and outlet ports 7 of the NMP packaging barrels 1 are connected to the sealing covers 8, and the suction guns 2 are inserted into the NMP packaging barrels 1 by unscrewing the sealing covers 8 and then inserting the suction guns 2 into the inlet and outlet ports 7 of the NMP packaging barrels 1. The threaded sealing covers 8 of the inlet and outlet ports 7 of the NMP packaging barrels 1 are designed to facilitate the operation personnel to unscrew the sealing covers 8 and insert the suction guns 2, improve the safety and convenience of operation, and also ensure the sealing and safety of the suction process.

[0024] The inlet port of the temporary storage tank 5 is connected to the material main pipe 6 connected to the discharge outlet of the multi-channel valve 4, and the temporary storage tank 5 is also connected to the vacuum pump 10.

[0025] The vacuum control of the NMP barrel feeding and vacuum suction system is-0.1MPa to-0.08MPa.

[0026] The temporary storage tank 5 is provided with a gas phase pipeline 9 at the top, the gas outlet of the gas phase pipeline 9 is connected to the gas inlet of the vacuum pump 10, and the gas outlet of the vacuum pump 10 is connected to the tail gas main pipe 11. The gas phase pipeline 9 at the top of the temporary storage tank 5 is connected to the gas inlet of the vacuum pump 10, which helps to maintain the vacuum degree in the temporary storage tank 5, and at the same time, the gas phase material is introduced into the vacuum pump 10, avoiding the direct discharge of the gas phase material into the atmosphere, reducing the impact on the environment. The gas outlet of the vacuum pump 10 is connected to the tail gas main pipe 11, which can further process or discharge the tail gas.

[0027] The discharge pipeline 12 provided at the bottom of the temporary storage tank 5 is connected to the inlet port of the material transfer pump 13, and the discharge pipeline 14 connected to the discharge outlet of the material transfer pump 13 is used to feed the material to the raw material storage tank 15. The discharge pipeline 12 at the bottom of the temporary storage tank 5 is connected to the inlet port of the material transfer pump 13, which facilitates the transportation of NMP in the temporary storage tank 5 to the raw material storage tank 15. The material transfer pump 13 can provide stable material transfer capacity and ensure the safety and efficiency of the material during transportation.

[0028] The NMP barrel feeding and vacuum suction system utilizes the vacuum pump 10 to generate negative pressure in the temporary storage tank 5, thereby forming a pressure difference between the NMP packaging barrel 1 and the temporary storage tank 5. When the suction gun 2 is inserted into the bottom of the NMP packaging barrel 1 and opened, due to the negative pressure in the temporary storage tank 5, the NMP solvent in the packaging barrel is sucked into the temporary storage tank 5 through the suction gun 2, the metal hose 3 and the material main pipe 6 under the action of atmospheric pressure. The NMP solvent in the temporary storage tank 5 is then transported to the raw material storage tank 15 through the material transfer pump 13.

[0029] Through a set of vacuum system, multiple pumping points can be simultaneously corresponded, improving the pumping efficiency and overcoming the low efficiency problem of the original one pump corresponding to one barrel. The vacuum pumping can pump the material in the pipeline and the packaging barrel clean, reducing the material residue, thereby avoiding the waste of material and the pollution caused by the residue.

[0030] The vacuum system can be shared among multiple pumping points, because the vacuum is generated systematically, not each point needs a separate pump. This means that one central vacuum pump 10 can provide pumping service for multiple packaging barrels, without the need to equip each barrel with a separate diaphragm pump. The control valves in the vacuum system can be adjusted so that the operator can open or close the channels to each pumping point as needed. In this way, multiple pumping points can carry out pumping operations simultaneously without being affected by other points. Since the vacuum system usually has a large capacity and flow capacity, it can handle the material from multiple pumping points without being overloaded by multiple pumps working at the same time.

[0031] The vacuum pumping can generate a lower pressure, thereby forming a higher pressure difference in the pipeline and the packaging barrel. This pressure difference helps to suck the material out of the barrel, even including those materials adhering to the barrel wall and the pipeline. Since the vacuum pump 10 can generate stable negative pressure, it can ensure that the material moves completely in the pipeline until the pressure in the packaging barrel and the pipeline is balanced, which reduces the material residue. Another advantage of vacuum pumping is that it can effectively exclude air and bubbles in the pipeline, which helps to prevent material loss due to air entrainment. Reducing material residue means reducing material waste, while also reducing pollution problems caused by residual material. This not only helps to save costs, but also meets environmental requirements and reduces the impact of harmful substances on the environment.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. A vacuum extraction system for NMP drum filling, characterized in that, include: NMP packaging drum (1), used to hold NMP solvent and set in several; The extraction gun (2) is used to extract NMP solvent from the NMP packaging barrel (1). The extraction gun (2) is provided with several extraction guns (2) and the outlets of the extraction guns (2) are respectively connected to the inlet of the multi-channel valve (4) through metal hoses (3). The temporary storage tank (5) is used to temporarily store the NMP solvent fed by the suction gun (2). The inlet of the temporary storage tank (5) is connected to the material main pipe (6) connected to the outlet of the multi-channel valve (4). The temporary storage tank (5) is also connected to a vacuum pump (10).

2. The NMP drum vacuum extraction system according to claim 1, characterized in that: The inlet / outlet (7) of the NMP packaging barrel (1) is connected to a sealing cap (8). By unscrewing the sealing cap (8), the extraction gun (2) can be inserted into the NMP packaging barrel (1) through the inlet / outlet (7).

3. The NMP drum vacuum extraction system according to claim 1, characterized in that: The top of the temporary storage tank (5) is equipped with a gas phase pipe (9), the outlet of the gas phase pipe (9) is connected to the inlet of the vacuum pump (10), and the outlet of the vacuum pump (10) is connected to the exhaust gas main pipe (11).

4. The NMP drum vacuum extraction system according to claim 1, characterized in that: The discharge pipe (12) at the bottom of the temporary storage tank (5) is connected to the inlet of the material transfer pump (13), and the feeding pipe (14) connected to the discharge port of the material transfer pump (13) feeds the material to the raw material storage tank (15).

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