Low-boiling-point liquid and liquefied gas feeding device of continuous flow reactor

Abstract

The utility model discloses a low boiling point liquid and liquefied gas feeding device for a continuous flow reactor, which relates to the field of continuous flow reactor feeding and comprises a shell and an internal component, an upper cover of the shell is an inclined plane, a control screen with a PLC (programmable logic controller) is arranged on the inclined plane, a PLC controller is arranged on the back of the screen, and the angle of the PLC controller conforms to human engineering. Three inlet and outlet clamping sleeves are arranged at the lower part of the shell, the lower left upper pipeline clamping sleeve is a material inlet, the lower left lower pipeline clamping sleeve is an exhaust pipeline clamping sleeve, and the right pipeline clamping sleeve is connected to a continuous flow reactor; the interior of the shell is of a two-layer structure, a material storage tank, a heat exchange copper pipe plunger pump and an outlet pressure controller are arranged on the upper layer, and a nitrogen steel cylinder, a vacuum diaphragm pump, a valve controller, a compressor and a heat exchanger are arranged on the lower layer.

Description

Technical Field

[0001] The utility model belongs to a feeding device for a continuous flow reactor, and particularly relates to a feeding device for low-boiling-point and liquefiable gas materials in a continuous flow reactor. Background Technique

[0002] A continuous flow reactor is a special type of continuous flow pipeline reactor. The diameter of its channels can reach millimeter and micron levels. Compared with traditional batch stirred tank reactors, continuous flow reactors have the advantages of high mass transfer and heat transfer efficiency, precise control of reaction temperature, raw material ratio, and reaction time, no backmixing, safe and reliable reaction operation, and greatly reduced or even completely eliminated side reactions. However, it has high requirements for the feeding device. For low-boiling-point materials, since they are prone to gasification at the feeding end of the pump, the current mainstream piston pumps cannot feed smoothly. The usual practice is to heat the low-boiling-point materials into gases and then control them with gas flow meters. However, gas feeding is easily affected by feeding temperature and pressure and cannot be precisely controlled.

[0003] In recent years, researchers have conducted more research on energy and mass exchange in continuous flow reactors, solving a large number of reaction systems that cannot be produced by conventional batch reactors, such as strong exothermic reactions, reactions with backmixing impurities, and other dangerous processes. However, less research has been done on the transportation of materials. Especially the transportation of low-boiling-point materials. Content of the Utility Model

[0004] In response to the existing requirements for transporting low-boiling-point materials, we designed a feeding device for low-boiling-point and liquefiable gas materials in a continuous flow reactor, reasonably arranged the internal functional components, and controlled them through a PLC, reducing the operation difficulty and solving the transportation problem of low-boiling-point liquids and liquefiable gas materials on continuous flow reactors. This device can provide stable and continuous transportation requirements for low-boiling-point liquids and liquefiable gas materials in continuous flow reactors. Specifically, the utility model includes the following technical solutions.

[0005] A feeding device for low-boiling-point and liquefiable gas materials in a continuous flow reactor includes a housing and internal components. A slope is provided at the top of the device housing, and a PLC control component and a control screen are arranged on the slope. The internal components of the device are of a two-layer structure. The upper layer is arranged with a material storage tank, a heat exchange copper tube, a piston pump, an outlet pressure controller, and related pipelines. The lower layer is arranged with a nitrogen gas cylinder, a diaphragm vacuum pump, a valve controller, a compressor, and a radiator.

[0006] A material feeding port and a diaphragm pump exhaust port are reserved on the left side of the device housing, and a material outlet is reserved on the right side for connecting to the reactor device.

[0007] There is a slope above the device housing, and a PLC control screen is installed on the slope, which is convenient for personnel to operate the entire device. The execution circuit of the PLC is installed on the back of the PLC.

[0008] The internal components of the device are of a double-layer structure;

[0009] The described material storage tank is a stainless steel pressure-resistant storage tank, and the design pressure is determined according to the properties of the selected material. The outer surface of the storage tank is equipped with heat exchange copper tubes, and the outside of the copper tubes is coated with thermal insulation materials to reduce energy loss during operation. The material storage tank is provided with a stainless steel bracket and fixed on the bottom plate. A number of pipes are provided at the top of the described material storage tank, which can provide process requirements such as pressurization, feeding, discharging, liquid level, and pressure measurement.

[0010] The described heat exchange copper tubes are arranged on the outer surface of the pressure-resistant storage tank. After the copper tubes of the two storage tanks are connected in series, a compressor and a heat exchange device are connected at both ends. When needed, the stainless steel storage tank can be cooled to ensure that the material is in a liquid state.

[0011] The pump head of the described plunger pump is preferably made of stainless steel, and the flow rate range can be selected according to the reactor to be connected, usually 0 - 10 mL / min and 0 - 100 mL / min.

[0012] The described outlet pressure controller functions as a controllable back pressure valve and is preferably made of stainless steel.

[0013] The described nitrogen gas cylinder is arranged in the lower layer of the equipment, providing the required pressure for the device and a purging and cleaning function when replacing materials. Its outlet end is connected to a valve controller

[0014] The described valve controller is of a rectangular structure and is arranged in the middle position of the lower layer of the equipment. The inside of the described valve controller is multiple electric control valves, and the opening and closing of the valves are controlled by the built-in program of the PLC.

[0015] The described vacuum diaphragm pump is arranged on the left side of the lower layer structure, and the exhaust pipe can pass through the shell to discharge the device gas out of the system. The outlet is provided with a pipe ferrule connection and can be connected to the waste main pipe. The right side inlet end is connected to the described valve controller.

[0016] One end of the described compressor is connected to the heat exchange copper tube after passing through the necessary refrigeration components, and the other end of the compressor is connected to the described heat exchanger through the necessary refrigeration components. The above-mentioned necessary refrigeration components are well-known to refrigeration-related professionals and can be skillfully integrated into the device. The working state data of the compressor and the heat exchanger are sourced from the device data provided by the PLC.

[0017] Preferably, the compressor and the heat exchanger are arranged in the lower layer of the equipment to avoid the vibration generated during operation from affecting the stability of the entire device.

[0018] It is easy for those skilled in the art to understand that the present utility model can be used for the continuous transportation of low-boiling point liquids and liquefiable gas materials.

[0019] For the continuous transportation of low-boiling-point liquids and liquefiable materials of the present utility model, after selecting the corresponding materials through the built-in PLC program, the vacuum diaphragm pump starts to work, discharging the air and moisture in the system. After the vacuum diaphragm pump works for a period of time and when the device detects that the vacuum degree reaches the requirement, the compressor starts to operate to cool down the two storage tanks. When the temperature drops to the required temperature of the device, it prompts to fill the low-boiling-point material. At this time, connect the low-boiling-point material cylinder to the reserved material inlet ferrule. Open the valve of the material cylinder. Then click the feed button on the PLC screen. The initial feeding is for both storage tanks simultaneously. When the device detects that both storage tanks are full, the PLC screen prompts that the feeding is completed. After clicking the confirmation button, close the valve of the feeding material cylinder, and the material filling is completed. If the device connected to the rear end requires a large amount of feeding, the connection of the material cylinder can be kept. After the material filling is completed, connect the device to the continuous flow reactor and set the reactor pressure on the PLC screen. At this time, the device pressurizes the entire device through the nitrogen cylinder to ensure that the low-boiling-point material is in a liquid state at the current temperature and pressure. After the pressurization is completed, the low-boiling-point liquid and liquefiable gas can be pumped into the continuous flow reactor by setting the required flow rate. When the material in one storage tank drops to a certain extent, the feeding automatically switches to the other storage tank. At this time, the diaphragm pump starts to evacuate the empty storage tank. When a certain negative pressure is reached, feeding can be carried out again. The process of feeding materials does not affect the continuous pumping of a certain flow rate of materials from the entire device into the continuous flow reactor. The continuous feeding of the continuous flow reactor is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is an overall external view schematic diagram of the feeding device for low-boiling-point liquids and liquefiable gas materials of the continuous flow reactor of the present utility model.

[0021] Figure 2 FIG. is an internal structure schematic diagram of the feeding device for low-boiling-point liquids and liquefiable gas materials of the continuous flow reactor of the present utility model.

[0022] Figure 3 FIG. is a structural schematic diagram of the refrigeration device in the present utility model.

[0023] Figure 4 FIG. is a structural schematic diagram of the material storage tank in the present utility model.

[0024] Figure 5 FIG. is a structural schematic diagram of the vacuum diaphragm pump in the present utility model.

[0025] Figure 6 FIG. is a structural schematic diagram of the nitrogen cylinder in the present utility model.

[0026] Figure 7 FIG. is a structural schematic diagram of the outlet pressure controller in the present utility model.

[0027] Figure 8This is a schematic structural diagram of the nitrogen gas cylinder in the present utility model.

[0028] Figure 9 This is a schematic structural diagram of the plunger pump in the present utility model.

[0029] Where: 1. Housing; 11. PLC control panel; 12. Feed ferrule; 13. Exhaust port of diaphragm vacuum pump; 14. Material outlet ferrule; 2. Booster, feed, discharge, liquid level, pressure control pipeline; 31. Heat exchange copper tube; 32. Compressor; 33. Heat exchanger; 41. Material storage tank; 42. Support for material storage tank; 43. Connector for support of material storage tank; 51. Main body of vacuum diaphragm pump; 52. Exhaust port; 53. Inlet of vacuum diaphragm pump; 61. Nitrogen gas cylinder; 62. Nitrogen gas cylinder outlet; 71. Outlet pressure controller; 72. Plunger pump connection bayonet; 73. Connector for outlet pressure controller; 74. Continuous flow reactor connection ferrule; 81. Main body of valve controller; 82. Vacuum diaphragm pump connection ferrule; 83. Nitrogen gas cylinder connection ferrule; 84. Ferrule for connection of booster, feed, discharge, liquid level, pressure control pipe; 85. Fixed component; 86. Material inlet ferrule; 87. Plunger pump inlet ferrule. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the continuous flow reactor low-boiling-point liquid and liquefiable gas material feeding device of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present utility model.

[0031] For the sake of simplicity in description, sometimes in this article, the "continuous flow reactor low-boiling-point liquid and liquefiable gas material feeding device" is referred to as the "feeding device", or simply as the "device", and they represent the same meaning and can be used interchangeably.

[0032] Please refer to Figure 1 - Figure 2 , in the embodiments of the present utility model, a continuous flow reactor low-boiling-point liquid and liquefiable gas feeding device is provided, including a housing 1 and internal components Figure 2As shown, the upper cover of the housing 1 is an inclined plane, on which a control screen 11 of the PLC is installed for controlling the operation of the device. A PLC controller is arranged on the back of the control screen. The angle of the control screen of the PLC is ergonomic. On the left side of the lower half of the housing 1, there are two pipeline ferrule connectors. The upper left pipeline ferrule connector (12) in the lower left part is the material inlet, and the lower left is the exhaust pipeline ferrule connector (13). The upper left pipeline ferrule connector 12 is convenient for connecting with the material cylinder. The exhaust pipeline ferrule connector 13 can be conveniently connected to the exhaust pipeline to facilitate the discharge of waste in the device. On the right side of the lower half of the housing 1, there is a material outlet pipeline ferrule connector 14, which can be conveniently connected to the continuous flow reaction device. The pipeline ferrule connectors 12, 13, and 14 all adopt the current mainstream connection ferrules, and the pressure resistance and sealing effect can meet higher requirements while facilitating connection.

[0033] Please refer to Figure 2 , the internal components are of a double-layer structure. On the upper layer, there are a material storage tank 41, a plunger pump 91, an outlet pressure controller 71, and pipelines 2 for boosting, feeding, discharging, liquid level, and pressure control. On the lower layer, there are a nitrogen cylinder 61, a vacuum diaphragm pump 51, a valve controller 81, a compressor 32, and a heat exchanger 33.

[0034] Preferably, heat exchange copper tubes 31 are arranged outside the material storage tank.

[0035] Please refer to Figures 2 and Figure 8 , a pipeline 2 is connected to the upper part of the material storage tank 41, and the other end of the pipeline 2 is connected to the pipeline connection ferrule 84 on the upper part of the valve controller 81 on the lower layer. The outside of the material storage tank 41 is coated with heat exchange copper tubes 31. The inlet pipeline of the plunger pump 91 is connected to the pipeline ferrule 87 at the front end of the valve controller, and the outlet pipeline is connected to the pressure controller 71. The outlet of the nitrogen cylinder 61 is connected to the pipeline ferrule 83 on the valve controller 81. The air extraction end of the vacuum diaphragm pump 51 is connected to the air extraction pipeline ferrule 82 of the valve controller. The compressor 32, the heat exchanger 33, the cooling copper tubes 31, and necessary refrigeration components form the cooling device of the storage tank 41.

[0036] Please refer to Figure 4 , the material storage tank 41 is made of stainless steel material, which provides sufficient rigidity and heat conduction ability while being corrosion-resistant. The material storage tank 41 is connected to the laminate by a fixing device 42 through a material storage tank support connector 43.

[0037] Please refer to Figure 3, the heat exchange copper tube 31, the compressor 32, and the heat exchanger 33 constitute the temperature control device of the material storage tank 41. The heat exchange copper tube 31 is spirally wound around the material storage tank 41, and the outside of the heat exchange copper tube 31 is coated with thermal insulation material. The compressor 32, the heat exchanger 33, the heat exchange copper tube 31, and the necessary components related to refrigeration together cool the material in the material storage tank 41, and its temperature is controlled by the PLC 11. The control data of the PLC 11 comes from the temperature sensor integrated in the material storage tank 41. Some components of the temperature control device are not shown in the figure. These components are well-known to refrigeration professionals and can be proficiently integrated into the device.

[0038] Preferably, the outside of the copper tube is coated with thermal insulation material.

[0039] Please refer to Figure 5 , the vacuum diaphragm pump 51 is preferably a diaphragm pump, which can achieve a lower ultimate vacuum and is maintenance-free. The gas suction end of the diaphragm pump is 53, and the exhaust end is 52, and its connection method is compression fitting connection.

[0040] Please refer to Figure 6 , the nitrogen gas cylinder is customized, and its size is convenient for layout in the device. The outlet of the nitrogen gas cylinder is connected to the valve controller 81 through 62.

[0041] Please refer to Figure 7 and Figure 9 , the outlet pressure controller 71 is connected to the outlet pipeline 92 of the plunger pump 91 through a compression fitting 72, and the outlet compression fitting 74 can be connected to the feed end of the continuous flow reactor.

[0042] Preferably, the pressure value of the outlet pressure controller 71 is a variable pressure controlled by the PLC, and it can be intelligently controlled by the PLC according to the properties of the conveyed material. Due to cost factors, a manual control setting of a value that the plunger pump can withstand can also be adopted to adapt to the conveying of most materials.

[0043] Preferably, the pump head of the plunger pump 91 is made of stainless steel material and can withstand a large pressure. Preferably, the internal cam structure and pump head design of the plunger pump can provide a small pulse value, and a damper or a cam with a double pump head cooperation design is arranged inside the plunger pump (91) to avoid the pulse generated during pumping.

[0044] Please refer to Figure 8 , the valve controller 81 is in a cuboid structure and is fixed to the device bottom plate by the fixing component 85. A number of valves are arranged inside it, and the opening and closing of its valves are controlled by the built-in program of the PLC. The control data of the PLC comes from the pressure and liquid level sensors integrated in the pipeline 2 connected above the material storage tank 41 and the valve controller 81. The built-in program and the electric control part of the PLC are well-known to relevant professionals and can be proficiently arranged in the device.

[0045] The usage method of the present utility model is as follows: Before use, the internal components have been installed Figure 2 and are installed in the housing 1 as shown. When the device is in use, the corresponding material is selected through the PLC control panel 11 on the inclined surface at the upper part of the housing 1. After the material selection is completed, the device will automatically control the corresponding vacuum degree, pressure, and temperature according to the properties of the selected material. The exhaust end 12 of the device is connected to the waste gas device, and at this time, the vacuum diaphragm pump 51 starts to work to remove the air and the material used last time in the device. After the vacuum diaphragm pump 51 works for a period of time and the vacuum degree reaches the preset value and remains for a period of time, the compressor 32 starts to work, and the device composed of the heat exchanger 33 and the heat exchange copper tube 31 connected thereto cools the material storage tank 41. When the temperature and the vacuum degree reach the preset values and remain for a period of time, the device prompts to connect the material cylinder. At this time, the outlet end of the material cylinder is connected to the feed ferrule 12 at the lower part of the outer shell 1 through a ferrule. The initial filling is for both storage tanks simultaneously. When the material storage tanks are full, the device prompts that the filling is completed. At this time, the main valve of the material cylinder itself is closed, and the next step is entered. The device pressurizes the material storage tanks through the built-in nitrogen cylinder to ensure that the material at the inlet end of the plunger pump 91 does not vaporize. The continuous flow reactor that needs to feed low-boiling point materials is connected to the material outlet ferrule 14 of the device housing 1. Set the corresponding discharge flow rate on the PLC control panel 11 as needed to complete the feeding of low-boiling point liquids and liquefiable gases to the continuous flow reactor. After the device runs for a period of time and the material in one of the storage tanks is basically consumed, the device will automatically switch to feeding from the other half of the storage tank. At this time, the storage tank with the consumed material can be filled with material, without affecting the continuous feeding of the continuous flow reactor by the entire device.

[0046] The working principle of the present utility model is: While the air and the material in the device are emptied by the integrated vacuum diaphragm pump 51 in the device, the storage tank is cooled to below the boiling point of the material to be pumped, and at this time, the material can be filled. After the material filling is completed, the integrated nitrogen cylinder 61 in the device pressurizes the entire device to ensure that the material at the inlet end of the plunger pump 91 does not vaporize. In addition, a pressure controller 71 is connected to the outlet end of the plunger pump 91 to control the outlet pressure to be greater than the inlet end pressure, so that the plunger pump 91 can stably and continuously pump the metered liquid. Thus, the problems of inaccurate metering and difficult metering in the transportation of low-boiling point materials are avoided.

[0047] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Although this specification is described according to embodiments, not every embodiment only contains one technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-boiling-point liquid and liquefiable gas feeding device for a continuous flow reactor, characterized in that: The invention comprises a shell (1) and internal components. The upper cover of the shell (1) is arranged in an inclined surface. A PLC control screen (11) is arranged on the inclined surface. A PLC controller is arranged on the back of the screen. The angle of the PLC (11) is ergonomic. The lower part of the shell (1) is provided with three inlet and outlet ferrules, wherein the upper left pipeline ferrule (12) is for material inlet and the lower left is for exhaust pipeline ferrule (13). The pipeline ferrule on the right is for connection to a continuous flow reactor. The interior of the housing (1) is a two-layer structure, wherein the upper layer is provided with a material storage tank (41), a heat exchange copper tube (31), a plunger pump (91), and an outlet pressure controller (71), and the lower layer is provided with a nitrogen cylinder (61), a vacuum diaphragm pump (51), a valve controller (81), a compressor (32), and a heat exchanger (33).

2. The low-boiling-point liquid and liquefiable gas feeding device for a continuous flow reactor according to claim 1, characterized in that: The material storage tank (41) is made of stainless steel, the heat exchange copper tube (31) is spirally wound on the material storage tank (41), and the outer side of the heat exchange copper tube (31) is coated with insulation material.

3. The low-boiling-point liquid and liquefiable gas feeding device for a continuous flow reactor according to claim 1, characterized in that: The plunger pump (91) is arranged on the upper right side of the internal component. A damper or a cam designed with a double pump head is provided inside the plunger pump (91) to avoid pulses generated during pumping. The inlet of the plunger pump (91) is connected to the valve controller (81) and the outlet is connected to the outlet pressure controller (71).

4. The low-boiling-point liquid and liquefiable gas feeding device for a continuous flow reactor according to claim 1, characterized in that: The outlet pressure controller (71) is connected to the outlet of the plunger pump (91) and is used to control the outlet pressure of the plunger pump (91) to be greater than the feed end pressure.

5. The low-boiling-point liquid and liquefiable gas feeding device for a continuous flow reactor according to claim 1, characterized in that: The nitrogen cylinder is used to provide the inlet pressure of the plunger pump (91), and the pressure is controlled by a valve controller (81) connected to the outlet of the nitrogen cylinder.

6. The low-boiling-point liquid and liquefiable gas feeding device for a continuous flow reactor according to claim 1, characterized in that: The air and residual materials in the device are discharged to the exhaust device through the exhaust pipe sleeves (13) at the upper and lower parts of the housing (1) via a vacuum diaphragm pump (51).

7. The low-boiling-point liquid and liquefiable gas feeding device for a continuous flow reactor according to claim 1, characterized in that: The valve controller (81) has multiple electrically controlled valves integrated therein, and the opening and closing states of the valves are controlled by the PLC (11). The PLC control data is derived from the pressure and liquid level sensors integrated in the pipe (2) connected to the material storage tank (41) and the valve controller (81).

8. The low-boiling-point liquid and liquefiable gas feeding device for a continuous flow reactor according to claim 1, wherein: The compressor (32), heat exchanger (33), heat exchange copper tube (31) and necessary refrigeration components together cool the material in the material storage tank (41), and the temperature thereof is controlled by the PLC (11). The control data of the PLC (11) is derived from the temperature sensor integrated in the material storage tank (41).

9. The low-boiling-point liquid and liquefiable gas feeding device for a continuous flow reactor according to claim 1, characterized in that: It is used for feeding low-boiling-point liquid and liquefiable gas materials into a continuous flow reactor, and realizes continuous feeding of the continuous flow reactor by alternately using two built-in material storage tanks (41).

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