CN216935964U

CN216935964U - Liquefied gas recovery device for dehydrogenation reactor

Info

Publication number: CN216935964U
Application number: CN202220491696.2U
Authority: CN
Inventors: 尹玉昌; 李心月; 罗冠迪
Original assignee: Shandong Orient Hongye Chemical Co ltd
Current assignee: Shandong Orient Hongye Chemical Co ltd
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-07-12
Anticipated expiration: 2032-03-07

Abstract

The utility model discloses a liquefied gas recovery device of a dehydrogenation reactor, which comprises a feeding heat exchanger, a vacuum pump outlet tank, a hydrogen-extracting desorption gas buffer tank, a desorption gas compressor and a PLC (programmable logic controller), wherein the feeding heat exchanger is communicated with an inlet of the vacuum pump through a gas-phase material returning pipeline, an outlet of the vacuum pump is communicated with the vacuum pump outlet tank through a pipeline, a venting end of the vacuum pump outlet tank is communicated with an inlet of the hydrogen-extracting desorption gas buffer tank through a pipeline, the feeding heat exchanger is communicated with an inlet of the hydrogen-extracting desorption gas buffer tank through a liquid-phase material returning pipeline, an outlet of the hydrogen-extracting desorption gas buffer tank is connected with the desorption gas compressor, the liquid-phase material returning pipeline and the gas-phase material returning pipeline are finally connected to the hydrogen-extracting desorption gas buffer tank, the hydrogen-extracting desorption gas buffer tank is compressed by the desorption gas compressor and then sent to a gas pipe network for use as fuel gas, the liquefied gas is recovered, the cost is reduced, and the PLC controller is arranged, the start and stop of the solenoid valve, the vacuum pump and the gas analysis compressor are controlled by programming, and the automation degree is high.

Description

Liquefied gas recovery device of dehydrogenation reactor

Technical Field

The utility model relates to the technical field of dehydrogenation reaction devices, in particular to a liquefied gas recovery device of a dehydrogenation reactor.

Background

Dehydrogenation refers to the dehydrogenation of organic compound molecules at elevated temperatures in the presence of a catalyst or dehydrogenating agent. The dehydrogenation reaction is an elimination reaction and is also a form of oxidation reaction, after the switching of the dehydrogenation device reactor is completed, the pressure of liquefied gas is released to a torch pipeline, and the venting torch needs to be replaced by the liquefied gas every time the replacement reactor is switched, so that the loss of the liquefied gas is caused, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a liquefied gas recovery device for a dehydrogenation reactor, which aims to solve various problems.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a dehydrogenation reactor liquefied gas recovery unit, includes feeding heat exchanger, vacuum pump export jar, carries the analytic gas buffer tank of hydrogen, analytic gas compressor and PLC controller, the feeding heat exchanger has dehydrogenation reaction bed through the pipe connection, be linked together through gaseous phase material returned pipeline between feeding heat exchanger and the vacuum pump import, the vacuum pump export is linked together through pipeline and vacuum pump export jar, the evacuation end of vacuum pump export jar is through the pipeline and carry the entry intercommunication of the analytic gas buffer tank of hydrogen, be linked together through liquid phase material returned pipeline between feeding heat exchanger and the analytic gas buffer tank entry of hydrogen, carry the analytic gas buffer tank export of hydrogen and be connected with analytic gas compressor.

As an improvement, one end of the liquid-phase material returning pipeline close to the feeding heat exchanger is provided with an electromagnetic valve.

As a modification, the outlet of the feed heat exchanger is communicated with an external heating furnace through a pipeline.

As an improvement, the electromagnetic valve, the vacuum pump and the analysis gas compressor are electrically connected with the PLC and are controlled by the PLC in a programming mode.

As an improvement, the outlet of the desorption gas compressor is connected to a gas pipe network through a pipeline.

As an improvement, a one-way valve I is arranged on a discharge end pipeline of the vacuum pump outlet tank, and a one-way valve II is arranged at one end, close to the hydrogen extraction desorption gas buffer tank, of the liquid-phase material returning pipeline.

Compared with the prior art, the utility model has the advantages that: the device is provided with a liquid phase material returning pipeline connected to a hydrogen extracting and resolving gas buffer tank of the hydrogen extracting device, the gas is sent to a gas pipe network for use as gas after being compressed by a resolving gas compressor, the gas phase material returning pipeline is connected to a vacuum pump, the gas is connected to an inlet of the hydrogen extracting and resolving gas buffer tank through a pipeline after passing through an outlet tank of the vacuum pump, the gas is sent to the gas pipe network for use as gas after being compressed by the resolving gas compressor, the loss of the dehydrogenation device is reduced, the cost of liquefied gas is reduced, and the device is provided with a PLC (programmable logic controller) which is used for programming and controlling the starting and stopping of an electromagnetic valve, the vacuum pump and the resolving gas compressor, so that the automation degree is high.

Drawings

Fig. 1 is a schematic structural diagram of a liquefied gas recovery device of a dehydrogenation reactor.

Fig. 2 is a control system diagram of a liquefied gas recovery device of a dehydrogenation reactor.

As shown in the figure: 1. a feed heat exchanger; 2. a vacuum pump; 3. a vacuum pump outlet tank; 4. a hydrogen extraction desorption gas buffer tank; 5. resolving the gas compressor; 6. a dehydrogenation reaction bed; 7. a gas phase return line; 8. a liquid phase return line; 9. a PLC controller; 10. an electromagnetic valve; 11. heating furnace; 12. a one-way valve I; 13. and a second one-way valve.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation configuration and operation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "provided", "mounted", "connected", and the like are used in a broad sense and are intended to be inclusive, e.g., that they may be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or intercommunicated between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention will be described in further detail with reference to the accompanying drawings.

Combine 1 to figure 2 of the accompanying drawings, a dehydrogenation reactor liquefied gas recovery unit, including feeding heat exchanger 1, vacuum pump 2, vacuum pump outlet tank 3, the analytic gas buffer tank 4 of hydrogen lift, analytic gas compressor 5 and PLC controller 9, feeding heat exchanger 1 has dehydrogenation reaction bed 6 through the pipe connection, be linked together through gaseous phase material returned pipeline 7 between feeding heat exchanger 1 and the 2 imports of vacuum pump, 2 exports of vacuum pump are linked together through pipeline and vacuum pump outlet tank 3, the evacuation end of vacuum pump outlet tank 3 passes through the pipeline and the entry intercommunication of the analytic gas buffer tank 4 of hydrogen lift, feeding heat exchanger 1 and the analytic gas buffer tank 4 of hydrogen lift are linked together through liquid phase material returned pipeline 8 between the entry, the analytic gas buffer tank 4 export of hydrogen lift is connected with analytic gas compressor 5.

Liquid phase material returned pipeline is close to the one end of feeding heat exchanger 1 and is equipped with solenoid valve 10, the export of feeding heat exchanger 1 passes through pipeline and 11 intercommunications of external heating furnace, solenoid valve 10, vacuum pump 2, analytic atmospheric compressor 5 all with 9 electric connection of PLC controller and by 9 programming control of PLC controller, the export of analytic atmospheric compressor 5 is through pipe connection to gas pipe network, be equipped with check valve one 12 on the evacuation end pipeline of vacuum pump jar 3, the one end that liquid phase material returned pipeline 8 is close to the analytic gas buffer tank 4 of hydrogen of lifting is equipped with check valve two 13.

The specific implementation mode of the utility model is as follows: before the gas-liquid separation device is used, an external power supply is connected, materials enter a feeding heat exchanger 1 after being reacted through a dehydrogenation reaction bed 6, the materials enter a heating furnace 11 after the reaction is finished, a PLC (programmable logic controller) 9 controls an electromagnetic valve 10 to be opened, the residual liquid liquefied gas enters a hydrogen extraction desorption gas buffer tank 4 through a liquid-phase material returning pipeline 8, meanwhile, a vacuum pump 2 is started to pump the gaseous liquefied gas to a vacuum pump outlet tank 3, the gaseous liquefied gas enters the hydrogen extraction desorption gas buffer tank 4 from an emptying end, and the gaseous liquefied gas is compressed by a desorption gas compressor 5 and then is sent to a gas pipe network to be used as gas.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A liquefied gas recovery device of a dehydrogenation reactor is characterized in that: including feeding heat exchanger (1), vacuum pump (2), vacuum pump export jar (3), carry hydrogen analysis gas buffer tank (4), analysis gas compressor (5) and PLC controller (9), there is dehydrogenation reaction bed (6) feeding heat exchanger (1) through the pipe connection, be linked together through gaseous phase material returned pipeline (7) between feeding heat exchanger (1) and vacuum pump (2) import, vacuum pump (2) export is linked together through pipeline and vacuum pump export jar (3), the input intercommunication of unloading end through pipeline and hydrogen analysis gas buffer tank (4) is carried to the vacuum pump export jar (3), be linked together through liquid phase material returned pipeline (8) between feeding heat exchanger (1) and the hydrogen analysis gas buffer tank (4) entry, carry hydrogen analysis gas buffer tank (4) export and be connected with analysis gas compressor (5).

2. The liquefied gas recovery device for the dehydrogenation reactor according to claim 1, wherein: and an electromagnetic valve (10) is arranged at one end of the liquid-phase material returning pipeline close to the material feeding heat exchanger (1).

3. The liquefied gas recovery device for the dehydrogenation reactor according to claim 1, wherein: and the outlet of the feeding heat exchanger (1) is communicated with an external heating furnace (11) through a pipeline.

4. The liquefied gas recovery device for the dehydrogenation reactor according to claim 2, wherein: the electromagnetic valve (10), the vacuum pump (2) and the analysis gas compressor (5) are electrically connected with the PLC (9) and are controlled by the PLC (9) in a programming mode.

5. The liquefied gas recovery device for the dehydrogenation reactor according to claim 1, wherein: the outlet of the desorption gas compressor (5) is connected to a gas pipe network through a pipeline.

6. The liquefied gas recovery device for the dehydrogenation reactor according to claim 1, wherein: and a one-way valve I (12) is arranged on a vent end pipeline of the vacuum pump outlet tank (3), and a one-way valve II (13) is arranged at one end of the liquid-phase material returning pipeline (8) close to the hydrogen extraction desorption gas buffer tank (4).