Pressure-stabilizing gas collecting device

Abstract

The pressure-stabilizing gas collecting device is used for being communicated with a gas path of a reaction kettle, the pressure-stabilizing gas collecting device comprises a gas distributing pipe, a buffering device and a negative pressure device, the gas distributing pipe comprises a main pipeline and a plurality of branch pipelines communicated to the main pipeline, the branch pipelines are connected with the gas path of the reaction kettle, and the main pipeline is communicated to the buffering device; the negative pressure device is communicated to the buffer device, the buffer device is provided with a pressure release valve, and the pressure release valve is arranged at the top of the buffer device. The negative pressure device is used for providing negative pressure and collecting waste gas generated by reaction in the reaction kettle, so that the pressure in the reaction kettle is reduced, in addition, the pressure stabilizing and gas collecting device is further provided with a gas distributing pipe connected with a gas path of the reaction kettle and a buffering device provided with a pressure stabilizing valve, the pressure stability in the reaction kettle is improved, and the service life of the reaction kettle is prolonged. Therefore, the stable reaction process in the reaction kettle is ensured, and the production efficiency and the production convenience are improved.

Description

Technical Field

[0001] The present application relates to the field of chemical production, and in particular to a pressure-stabilizing gas collection device. Background Art

[0002] Reactors are a widely used chemical equipment in industrial production and are often used in reaction processes such as vacuum distillation. Vacuum distillation is to reduce the pressure inside the reactor and lower the boiling point of the solvent in the reactor to achieve the purpose of distillation at a lower temperature.

[0003] In related technologies, waste gases generated by reactions in reactors are mostly discharged through a gas outlet at the top of the reactor to reduce the pressure inside the reactor. However, when using this technology for production, problems such as insufficient vacuum and unstable pressure often occur within the reactor, significantly affecting production efficiency. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present application aims to provide a pressure-stabilizing gas collecting device, characterized in that it is used to communicate with the gas path of the reactor, and the pressure-stabilizing gas collecting device includes:

[0005] A gas distribution pipe, comprising a main pipe and a plurality of branch pipes connected to the main pipe, wherein each branch pipe is connected to the gas circuit of the reactor;

[0006] a buffer device, the main line being connected to the buffer device;

[0007] A negative pressure device is connected to the buffer device, and the buffer device is provided with a pressure relief valve, and the pressure relief valve is arranged on the top of the buffer device.

[0008] In a possible implementation manner, each branch pipeline is provided with a pressure-stabilizing valve.

[0009] In a possible implementation manner, the main line of the gas distribution pipe is provided with a pressure detection device.

[0010] In a possible implementation, the buffer device is connected to the negative pressure device through a metal hose.

[0011] In a possible implementation, the negative pressure device includes a vacuum pump.

[0012] In a possible implementation, the pressure-stabilizing gas collecting device further includes a water tank, and the water tank is connected to the negative pressure device.

[0013] In a possible implementation, the water tank is provided with an exhaust port, a liquid inlet, and a liquid outlet. The exhaust port and the liquid inlet are provided at the top of the water tank, and the liquid outlet is provided at the bottom of the water tank.

[0014] In a possible implementation manner, the water tank is further provided with a liquid level detection device.

[0015] In a possible implementation, the buffer device is used to contain a first solvent, and the water tank is used to contain a second solvent, and the first solvent is different from the second solvent.

[0016] In a possible embodiment, the buffer device is provided with a heating device; and / or,

[0017] The water tank is provided with a heating device.

[0018] The advantages of the present application are that: the present application provides negative pressure through a negative pressure device to collect waste gas generated by the reaction in the reactor, thereby reducing the pressure in the reactor. In addition, the pressure-stabilizing gas collection device of the present application is also provided with a gas distribution pipe connected to the gas circuit of the reactor, and a buffer device provided with a pressure-stabilizing valve, which improves the gas pressure stability in the reactor to ensure that the reaction process in the reactor proceeds stably, thereby improving production efficiency and production convenience.

[0019] Other features and advantages of the present application will be set forth in the subsequent description and, in part, will become apparent from the description or understood through implementation of the present application. The purposes and other advantages of the present application can be realized and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, are used to explain the principles of the present application. In these drawings, similar reference numerals are used to identify similar elements. The drawings described below are some embodiments of the present application, but not all embodiments. For those of ordinary skill in the art, other drawings can be derived from these drawings without inventive effort.

[0021] Figure 1 It is a schematic structural diagram of a pressure-stabilizing gas collecting device according to an exemplary embodiment. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. It should be noted that, in the absence of conflict, the embodiments in the present application and the feature vectors in the embodiments can be arbitrarily combined with each other.

[0023] Reactors are a widely used chemical equipment in industrial production and are often used in reaction processes such as vacuum distillation. Vacuum distillation is to reduce the pressure inside the reactor and lower the boiling point of the solvent in the reactor to achieve the purpose of distillation at a lower temperature.

[0024] In related technologies, waste gases generated by reactions in reactors are mostly discharged through a gas outlet at the top of the reactor to reduce the pressure inside the reactor. However, when using this technology for production, problems such as insufficient vacuum and unstable pressure often occur within the reactor, significantly affecting production efficiency.

[0025] To solve the above problems, the present application provides a pressure-stabilizing gas collection device, which provides negative pressure through a negative pressure device to collect waste gas generated by the reaction in the reactor, thereby reducing the pressure in the reactor. In addition, the pressure-stabilizing gas collection device of the present application is also provided with a gas distribution pipe connected to the gas circuit of the reactor, and a buffer device provided with a pressure-stabilizing valve, which improves the gas pressure stability in the reactor to ensure that the reaction process in the reactor proceeds stably, thereby improving production efficiency and production convenience.

[0026] According to an exemplary embodiment, Figure 1 As shown, an embodiment of the present application provides a pressure-stabilizing gas collecting device, which is used to connect to the gas path of a reactor (not shown in the figure) to collect waste gas generated by the reaction in the reactor, reduce the gas pressure in the reactor, and maintain a stable low-pressure environment in the reactor.

[0027] The pressure-stabilizing gas collection device includes a gas distribution pipe 10, a buffer device 20, and a negative pressure device 30. The gas distribution pipe 10 is connected to the gas circuit of the reactor. For example, the gas distribution pipe 10 can be connected to the gas outlet of the reactor's condenser (not shown). The gas distribution pipe 10 is connected to the buffer device 20, which is also connected to the negative pressure device 30. The negative pressure device 30 provides negative pressure to reduce the pressure in the reactor.

[0028] The gas distribution pipe 10 includes a main line 11 and several branch lines 12. The branch lines 12 are connected to the main line 11, and each branch line 12 is connected to the gas circuit of a reactor. Each branch line 12 can be connected to the gas outlet of a different reactor, providing centralized pressure supply to multiple reactors and regulating the gas pressure within them, thereby improving resource utilization and production efficiency.

[0029] Of course, it is understandable that each branch pipe 12 can also be connected to the gas outlet of the same reactor. By setting up multiple branch pipes 12 in parallel, the air pressure fluctuation caused by poor exhaust gas discharge can be avoided, and the exhaust gas generated in the reactor can be discharged more smoothly, thereby keeping the air pressure in the reactor stable.

[0030] The main line 11 of the gas distribution pipe 10 is connected to the buffer device 20, which is connected to the negative pressure device 30. The negative pressure device 30 is connected to the buffer device 20 to apply negative pressure to the reactor. The exhaust gas generated by the reaction in the reactor is collected and discharged through the buffer device 20 and the negative pressure device 30, thereby reducing the pressure in the reactor. The buffer device 20 is also equipped with a pressure relief valve 21. The pressure relief valve 21 is installed at the top of the buffer device 20. By providing the pressure relief valve 21, some exhaust gas can be discharged in a timely manner, maintaining a stable air pressure and preventing unstable air pressure from affecting production efficiency.

[0031] In the embodiment of the present application, negative pressure is provided by a negative pressure device to collect waste gas generated by the reaction in the reactor, thereby reducing the pressure in the reactor. In addition, the pressure-stabilizing gas collection device of the present application is also provided with a gas distribution pipe connected to the gas circuit of the reactor, and a buffer device provided with a pressure-stabilizing valve, which improves the gas pressure stability in the reactor to ensure that the reaction process in the reactor proceeds stably, thereby improving production efficiency and production convenience.

[0032] In some embodiments, each branch line 12 is provided with a pressure stabilizing valve 121. Figure 1 As shown, each branch pipeline 12 is connected to the gas circuit of the reactor. At the same time, each branch pipeline 12 is also provided with a pressure stabilizing valve 121 to adjust the gas pressure, thereby further ensuring the stability of the gas pressure in the reactor.

[0033] In some embodiments, the main line 11 of the gas distribution pipe 10 is provided with a pressure detection device 111. The pressure detection device 111 can be, for example, a pressure gauge. By providing the pressure detection device 111, the pressure in the gas distribution pipe 10 can be monitored in real time, making it easier to adjust the air pressure in the gas distribution pipe 10, thereby regulating the air pressure in the reactor.

[0034] Of course, it is understandable that the pressure-stabilizing gas collecting device may also include a plurality of pressure detection devices 111. Pressure detection devices 111 are provided on the main pipeline 11 of the gas distribution pipe 10 and each branch pipeline 12. By changing the air pressure of each branch pipeline 12, the branch pipeline 12 that is blocked or leaking can be promptly identified, thereby achieving accurate monitoring of the air pressure of the gas distribution pipe 10 and improving the safety and reliability of the pressure-stabilizing gas collecting device.

[0035] In some embodiments, the gas distribution pipe 10 can be connected to the reactor via a PU (polyurethane) pipe. PU has high density, high wear resistance, long service life, and low production cost. Of course, it is understood that when the exhaust gas from the reactor contains substances that are compatible with PU, the gas distribution pipe 10 can also be connected to the reactor using a pipe made of other materials. Those skilled in the art can configure this according to actual production scenarios, and this embodiment of the present application does not impose any excessive restrictions on this.

[0036] In some embodiments, a metal ball valve 112 is further provided on the side of the main line 11 of the gas distribution pipe 10 close to the buffer device 20. The gas distribution pipe 10 can be connected to the buffer device 20 through the metal ball valve 112 so that the air pressure in the gas distribution pipe 10 can be adjusted through the metal ball valve 112.

[0037] In some embodiments, the main line 11 and the branch line 12 of the gas distribution pipe 10 can be metal pipes, such as steel pipes, aluminum pipes and other materials. The buffer device 20 can be connected to the negative pressure device 30 using a metal hose 301. The top of the buffer device 20 and one end of the negative pressure device 30 are connected to the metal hose 301 through a 304 stainless steel elbow, and the other end of the top of the buffer device is connected to the pressure relief valve 21 through a 304 stainless steel elbow. By using metal pipes for connection, the structural strength of the pipeline can be improved, the pipeline damage can be avoided, and the stability of the pressure stabilizing and gas collecting device can be improved.

[0038] In some embodiments, the negative pressure device 30 includes a vacuum pump. For example, the negative pressure device 30 may be a water ring vacuum pump. The water ring vacuum pump includes an eccentric rotor with fixed blades. The pump throws water toward the stator wall, forming a liquid ring concentric with the stator. The liquid ring and rotor blades together form a variable volume rotary variable displacement vacuum pump. This pump can achieve a large exhaust volume with a smaller structural size, and the temperature change during the compressed gas process is small. This pump is suitable for pumping flammable and explosive gases. It has advantages such as simple structure, easy maintenance, and high safety, and is widely used in the field of chemical production.

[0039] In some embodiments, the pressure-stabilizing gas collection device further includes a water tank 40. In one example, the water tank 40 is connected to the negative pressure device 30. The negative pressure device 30 extracts exhaust gas from the buffer device 20. The liquid in the water tank 40 flows into the negative pressure device 30 and comes into contact with the exhaust gas to absorb and treat the exhaust gas. The liquid that has absorbed and treated the exhaust gas then flows back into the water tank 40 for circulation. In another example, the negative pressure device 30 can pump the exhaust gas extracted from the buffer device 20 into the water tank 40. The exhaust gas comes into contact with the liquid in the water tank 40 and is absorbed during the circulation of the liquid in the water tank 40.

[0040] By setting up a water tank 40 for water supply, it is possible to prevent the exhaust gas from directly contacting the external environment to cause pollution or bring safety hazards to human health. At the same time, the liquid in the water tank 40 can also absorb part of the exhaust gas, playing a certain role in stabilizing the negative pressure in the reactor.

[0041] In some embodiments, the water tank 40 is provided with an exhaust port 41, a liquid inlet 42 and a liquid outlet 43. Figure 1As shown, the exhaust port 41 and the liquid inlet 42 are arranged at the top of the water tank 40, and the liquid outlet 43 is arranged at the bottom of the water tank 40. A circulation pipeline (not shown in the figure) is also arranged inside the water tank 40, and the circulation pipeline is connected to the liquid inlet 42 and the liquid outlet 43 respectively. Among them, the provision of the liquid inlet 42 and the liquid outlet 43 can facilitate the timely replacement of the liquid in the water tank 40, realize the liquid circulation in the water tank 40, and ensure the absorption efficiency of the exhaust gas by the negative pressure device 30 and the water tank 40. The exhaust port 41 is arranged at the top of the water tank 40 so that the exhaust gas after absorption and treatment can be discharged in time, avoiding the accumulation of exhaust gas and the increase of pressure in the water tank 40, which affects the normal operation of the negative pressure device 30, and can also prevent the operator from inhaling too much harmful exhaust gas and affecting personal health.

[0042] In some embodiments, the water tank 40 is further provided with a liquid level detection device 44. The liquid level detection device 44 can be, for example, a liquid level gauge, a sensor, or other detection device to detect the liquid level in the water tank 40, thereby facilitating timely adjustment of the liquid level to prevent the liquid level from being too high or too low and affecting the stability of the pressure stabilizing gas collecting device.

[0043] In one example, regulating valves are provided on the liquid inlet 42 and the liquid outlet 43. The liquid inlet 42 is provided with a first regulating valve 421, and the liquid outlet 43 is provided with a second regulating valve 431. When the liquid level is too high, the first regulating valve 421 and / or the second regulating valve 431 are adjusted to reduce the amount of liquid flowing into the liquid inlet 42 and / or increase the amount of liquid flowing out of the liquid outlet 43, thereby lowering the liquid level to a normal level. Alternatively, when the liquid level is too low, the first regulating valve 421 and / or the second regulating valve 431 are adjusted to increase the amount of liquid flowing into the liquid inlet 42 and / or reduce the amount of liquid flowing out of the liquid outlet 43, thereby raising the liquid level to a normal level.

[0044] In some embodiments, the pressure-stabilizing gas collection device can also be used to treat the exhaust gas generated by the reaction in the reactor. The buffer device 20 contains a first solvent, and the water tank 40 contains a second solvent. The first and second solvents are used to absorb harmful substances in the exhaust gas or to detoxify the exhaust gas through chemical reactions, converting harmful substances in the exhaust gas into harmless substances. This reduces the emission of harmful substances, avoids harm to human health, and prevents pollution of the atmospheric environment.

[0045] The first solvent and the second solvent may be the same or different. The first solvent and the second solvent may be water or a solution capable of chemically reacting with harmful substances in the exhaust gas. Those skilled in the art may refer to the reaction products and exhaust gas components in the reactor and select the types of the first solvent and the second solvent according to actual needs. The embodiments of this application do not impose excessive restrictions on the specific types of the first solvent and the second solvent. For example, the first solvent and the second solvent are different, and the absorption and treatment effect of the exhaust gas is improved by absorbing and treating different components in the exhaust gas in stages.

[0046] In some embodiments, the buffer device 20 is provided with a heating device (not shown in the figure); and / or, the water tank 40 is provided with a heating device. In one example, the buffer device 20 is provided with a heating device. In another example, the water tank 40 is provided with a heating device. In yet another example, both the buffer device 20 and the water tank 40 are provided with heating devices. By heating the buffer device 20 and / or the water tank 40, the solubility of the exhaust gas can be increased, the efficiency of the gas collection and treatment can be improved, and the gas pressure in the reactor can be controlled by adjusting the temperature to achieve stable low pressure. Among them, the heating device can be, for example, an electromagnetic heater, a water bath, or the like. The embodiments of the present application do not impose too many restrictions on the specific selection of the heating device.

[0047] The technical effects of the embodiments of the present application will be described below in conjunction with specific usage scenarios.

[0048] In the embodiment of the present application, the reactor is used for vacuum distillation. For example, the reactor is a glass still with a volume of 100L, and the number of reactors is four. When vacuum distillation is performed, each branch pipe 12 of the gas distribution pipe 10 is connected to the gas outlet of the four reactors respectively, and then liquid is injected into the water tank 40, and the negative pressure device 30 is started to make the air pressure in the gas distribution pipe 10 detected by the pressure detection device 111 reach -0.1MPa. The pressure regulating valve 121 is then adjusted until liquid droplets are observed in the condensing pipes of the four reactors. At this time, the air pressure in the gas distribution pipe 10 detected by the pressure detection device 111 rises to -0.065MPa, which is within the air pressure range with better vacuum distillation effect.

[0049] During the process of reduced pressure distillation and after the distillation is completed, the reading of the pressure detection device 111 is constantly maintained at -0.07MPa, which can prove that the pressure-stabilizing gas collection device of the embodiment of the present application has a good negative pressure and stable air pressure effect on the reactor, which is beneficial to improving reaction efficiency and stability, and improving product quality and production efficiency.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. The present application is described in detail with reference to the preferred embodiments only. Those skilled in the art should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application, and should be included in the scope of the claims of the present application.

Claims

1. A pressure-stabilizing gas collecting device, characterized in that: The pressure stabilizing gas collecting device is used to communicate with the gas path of the reactor, and includes: A gas distribution pipe, comprising a main pipe and a plurality of branch pipes connected to the main pipe, wherein each branch pipe is connected to the gas circuit of the reactor; a buffer device, the main line being connected to the buffer device; A negative pressure device is connected to the buffer device, and the buffer device is provided with a pressure relief valve, and the pressure relief valve is arranged on the top of the buffer device.

2. The pressure-stabilizing gas collecting device according to claim 1, characterized in that: Each branch pipeline is provided with a pressure-stabilizing valve.

3. The pressure-stabilizing gas collecting device according to claim 1, characterized in that: The main pipeline of the gas distribution pipe is provided with a pressure detection device.

4. The pressure-stabilizing gas collecting device according to claim 1, characterized in that: The buffer device is communicated with the negative pressure device through a metal hose.

5. The pressure-stabilizing gas collecting device according to claim 1, characterized in that: The negative pressure device includes a vacuum pump.

6. The pressure-stabilizing gas collecting device according to claim 1, characterized in that: The pressure-stabilizing gas collecting device further includes a water tank, which is communicated with the negative pressure device.

7. The pressure-stabilizing gas collecting device according to claim 6, characterized in that: The water tank is provided with an exhaust port, a liquid inlet and a liquid outlet. The exhaust port and the liquid inlet are arranged at the top of the water tank, and the liquid outlet is arranged at the bottom of the water tank.

8. The pressure-stabilizing gas collecting device according to claim 6, characterized in that: The water tank is also provided with a liquid level detection device.

9. The pressure-stabilizing gas collecting device according to claim 6, characterized in that: The buffer device is used to contain a first solvent, and the water tank is used to contain a second solvent, and the first solvent is different from the second solvent.

10. The pressure-stabilizing gas collecting device according to claim 6, characterized in that: The buffer device is provided with a heating device; and / or, The water tank is provided with a heating device.

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