CN214503013U

CN214503013U - Reactor sampling device

Info

Publication number: CN214503013U
Application number: CN202022862749.0U
Authority: CN
Inventors: 豆丙乾
Original assignee: Bluestar Engineering Co Ltd
Current assignee: Bluestar Engineering Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-10-26
Anticipated expiration: 2030-12-03

Abstract

The utility model relates to a reactor sampling device, including the sampling unit, the sampling unit includes sampling bottle, sample pump, sample feeding pipeline, sample ejection of compact pipeline, sample return line and sample bypass pipeline, and sample feeding pipeline connects reactor and sample pump, and sample ejection of compact pipeline connects sample pump and sampling bottle, and sample return line connects sampling bottle and reactor, and sample bypass pipeline connects sample ejection of compact pipeline and sample return line, sets up the connecting valve between sample bypass pipeline and sample ejection of compact pipeline and sample return line; the fluid control unit is connected with the sampling feed pipeline, a first control valve and a second control valve are arranged on the sampling feed pipeline, and the fluid control unit is arranged between the first control valve and the second control valve. Prevent operating personnel contact sample at the sampling in-process, utilize the fluid control unit to clear up the relevant part of sample, avoid in the sample because of material deposit and block up the sample pipeline, easy operation, the convenient and high quality of sample.

Description

Reactor sampling device

Technical Field

The utility model relates to a chemical industry technical field especially relates to a reactor sampling device.

Background

In chemical industry, in order to monitor the reaction state of a reactor, the reaction materials in the reactor are generally required to be sampled, and part of reactors such as a vertical tubular reactor can only be selected to be sampled from the top of the reactor due to the limited opening position of the reactor. The traditional method is adopted to sample from the top of the reactor, and the sample is generally required to be hung from a sampling port of the reactor, so that the sampling repeatability is poor and the risk of reactant pollution is increased; the operation difficulty of operators is increased, the labor intensity of the operators is high, meanwhile, more toxic and harmful substances exist in the chemical process, the operators need to make necessary protective measures in the sampling process, however, toxic and harmful gases can still be inhaled, and certain potential safety hazards exist in the traditional manual sampling operation.

In addition, some reaction liquids containing solid particles are sampled, for example, sodium chloride particles exist in a shell and tube reactor for producing O, O-dimethyl thiophosphoryl chloride, so that the situation of sampling tube blockage is easily caused in the sampling process, the reaction degree in the shell and tube reactor cannot be accurately monitored, and the long-period stable operation of a production device is influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a reactor sampling device for solving the problems of high labor intensity of operators, poor sampling repeatability, easy pollution of reactants, harm of harmful gases to the operators, easy blockage of the sampling device and the like in the reactor sampling process.

A reactor sampling device comprises a sampling unit, wherein the sampling unit comprises a sampling bottle, a sampling pump, a sampling feeding pipeline, a sampling discharging pipeline, a sampling return pipeline and a sampling bypass pipeline, the sampling feeding pipeline is connected with a reactor and the sampling pump, the sampling discharging pipeline is connected with the sampling pump and the sampling bottle, the sampling return pipeline is connected with the sampling bottle and the reactor, the sampling bypass pipeline is connected with the sampling discharging pipeline and the sampling return pipeline, and a connecting valve is arranged between the sampling bypass pipeline and the sampling discharging pipeline as well as the sampling return pipeline; the fluid control unit is connected with the sampling feeding pipeline, a first control valve and a second control valve are arranged on the sampling feeding pipeline, and the fluid control unit is arranged between the first control valve and the second control valve.

Further, the fluid control unit comprises a purge unit, the purge unit comprises a purge gas and a purge gas inlet line, the purge gas inlet line is connected with the sampling feed line, and the purge gas enters the sampling feed line through the purge gas inlet line.

Further, the purging unit further comprises an air outlet valve and a pressure reducing valve, the air outlet valve and the pressure reducing valve are arranged on the purging air inlet pipeline, and the purging air enters the sampling feeding pipeline through the pressure reducing valve and the air outlet valve.

Further, the fluid control unit comprises a cleaning unit, the cleaning unit comprises cleaning liquid and a cleaning liquid inlet pipeline, the cleaning liquid inlet pipeline is connected with the sampling feed pipeline, and the cleaning liquid enters the sampling feed pipeline through the cleaning liquid inlet pipeline.

Furthermore, the cleaning unit also comprises a liquid outlet valve, the liquid outlet valve is arranged on the cleaning liquid inlet pipeline, and the cleaning liquid flows into the sampling feeding pipeline through the liquid outlet valve.

Further, the first control valve and the second control valve comprise two-position two-way solenoid valves.

Further, the connecting valve comprises a two-position three-way electromagnetic valve.

Further, the sampling device also comprises a control unit, and the control unit controls the on-off of the sampling unit and the fluid control unit.

Further, the sampling pump comprises a diaphragm pump.

Further, still include the sampling case, the sampling bottle sets up in the sampling case, set up the tail gas pipeline on the sampling case, the tail gas pipeline with the tail gas system intercommunication of reactor.

The reactor sampling device provided by the application comprises a sampling unit and a fluid control unit, wherein the fluid control unit is communicated with a sampling feeding pipeline of the sampling unit, and the sampling unit is washed by the fluid control unit, so that sample particles are prevented from being precipitated to block the sampling unit; the sampling unit includes the sample bottle, the sample pump, sample charge-in pipeline, sample discharge line, sample return line and sample bypass line, realizes the extraction of sample through sample charge-in pipeline and sample discharge line to collect the sample in the sample bottle, utilize sample bypass line, sample return line to make the sample fully react in the reactor before the sample simultaneously, thereby guarantee that the sample of drawing can truly embody the reaction state in the reactor. By adopting the reactor sampling device provided by the application, the problems that the operation of manually extracting samples is complex and the samples are easily polluted are solved; meanwhile, the sample can be prevented from being contacted by an operator in the sampling process, so that potential safety hazards caused by the fact that the operator inhales toxic and harmful gases are avoided; utilize the fluid control unit to clear up the relevant part of sample to avoided in the sample because of the risk of material deposit and block up the sample pipeline, and can fully collect reaction liquid, easy operation, the sample is convenient and has higher sample quality.

Drawings

Fig. 1 is a schematic structural diagram of a reactor sampling device according to an embodiment of the present invention;

fig. 2 is a flow chart illustrating the operation of a reactor sampling device according to an embodiment of the present invention;

FIG. 3 is a schematic view of a primary purge valve position of a sampling pipe of a reactor sampling device according to an embodiment of the present invention;

fig. 4 is a schematic view of a material circulation valve position of a reactor sampling device according to an embodiment of the present invention;

fig. 5 is a schematic view of a sample extraction valve position of a reactor sampling device according to an embodiment of the present invention;

fig. 6 is a schematic view of a flushing line valve position of a reactor sampling device according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a secondary purge valve position of a reactor sampling device in an embodiment of the present invention;

fig. 8 is a schematic view of a three-time purge valve position of a reactor sampling device in an embodiment of the present invention;

FIG. 9 is a schematic diagram of a four-time purge valve position of a reactor sampling device in an embodiment of the present invention;

fig. 10 is a schematic view of an initial state valve position of a reactor sampling device according to an embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is susceptible to similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and 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 particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a reactor sampling device according to an embodiment of the present invention, the reactor sampling device includes a sampling unit 10, a fluid control unit (not labeled) and a control unit 40, the fluid control unit is used for cleaning the sampling unit 10 to prevent the sampling unit from being blocked, and simultaneously, the fluid control unit helps to fully collect residual samples in the sampling unit 10. The fluid control unit comprises a purging unit 20 and a cleaning unit 30, the sampling unit 10 is used for taking out a reactant sample in the reactor 5, and the purging unit 20 is used for performing inflation purging on the sampling unit 10 to clean particles deposited on the sampling unit 10 so as to avoid the blockage of the sampling unit 10; the cleaning unit 30 is used for filling cleaning solution into the sampling unit 10 for cleaning, and meanwhile, is convenient for sealing and storing the sample extracted from the sampling unit 10; the control unit 40 is connected with the sampling unit 10, the purging unit 20 and the cleaning unit 30 and controls the on-off of the three.

Specifically, the sampling unit 10 includes a sampling bottle 11, a sampling pump 12, a sampling feed pipeline 13, a sampling discharge pipeline 14, a sampling return pipeline 15, and a sampling bypass pipeline 16, wherein the sampling pump 12 is used for taking out a sample in the reactor 5 and conveying the sample to the sampling bottle 11, one end of the sampling feed pipeline 13 is connected to the reactor 5, and the other end is connected to the sampling pump 12; one end of the sampling discharge pipeline 14 is connected with the sampling pump 12, and the other end is connected with the sampling bottle 11; the sampling return pipeline 15 is connected with the sampling bottle 11 and the reactor 5; the sampling bypass line 16 connects the sampling discharge line 14 and the sampling return line 15. Preferably, the sampling pump 12 is a diaphragm pump. In addition, in order to facilitate control of the sampling bypass line 16, both ends of the sampling bypass line are respectively communicated with the sampling discharge line 14 and the sampling return line 15 via a connection valve 161 and a connection valve 162.

Before sampling begins, in order to ensure that the extracted sample can sufficiently and truly reflect the reaction state in the reactor, firstly, the sampling unit 10 is utilized to perform material circulation operation on the sample, namely, the sampling pump 12 is opened to convey the material, and simultaneously, the connecting valve 161 and the connecting valve 162 at the two ends of the sampling bypass pipeline 16 are utilized to enable the material to flow into the reactor 5 through the sampling discharge pipeline 14, the sampling bypass pipeline 16 and the sampling return pipeline 15; after the above steps are circulated for many times, the reaction state of the material in the reactor 5 can be truly embodied by the material flowing through the sampling unit 10. Then, the sampling bypass line 16 is disconnected by the connection valve 161 and the connection valve 162 at the two ends of the sampling bypass line 16, and the material flows into the sampling bottle 11 through the sampling discharge line 14 and can flow into the reactor 5 through the sampling return line 15.

Preferably, one end of the sampling feed pipeline 13 is inserted from the top of the reactor 5 to below the liquid level of the reaction liquid, and the other end is connected with the sampling pump 12; the sampling discharge pipeline 14 is inserted into the bottom of the sampling bottle 11; one end of the sampling return line 15 is connected inside the sampling bottle 11 and ensures that its orifice is above the sampling liquid level, and the other end is connected to the top of the reactor 5 and ensures that the orifice is above the reaction liquid level. Preferably, the connecting

valves

161 and 162 are two-position three-way solenoid valves.

Further, the purge unit 20 includes a purge gas (not shown), a purge intake line 21, an intake valve 22, a pressure reducing valve 23, and an exhaust valve 24. Preferably, the purge gas, including but not limited to air, is input into the purge unit 20 through an air compressor. Sweep air inlet line 21 and connect sample feed line 13, carry the sweep gas through sample feed line 13 and sample unit 10, sample bottle 11 and reactor 5 in to the particulate matter that makes the sediment above that drops, and then prevents to take a sample in-process and lead to the problem of pipeline jam to take place because of the particulate matter sediment. In order to facilitate the control of the gas flow in the purge unit 20, the purge inlet line 21 is provided with an inlet valve 22, a pressure reducing valve 23 and an outlet valve 24, and the purge gas is introduced into the purge inlet line 21 by adjusting the inlet valve 22 and the pressure of the purge gas adjusted by the pressure reducing valve 23, so that the purge gas can blow off the deposited particles.

In addition, in order to facilitate the separation of the purging unit 20 and the sampling unit 10, an air outlet valve 24 is arranged at the end part of the purging air inlet pipeline 21 connected with the sampling feed pipeline 13, and the air outlet valve 24 is controlled to realize the on-off of the purging air inlet pipeline 21, so that the mutual interference between the purging process and the sampling process is avoided. Preferably, the air inlet valve 22 is a two-way manual valve, the pressure reducing valve 23 is a self-operated regulating valve, and the air outlet valve 24 is a two-position two-way electromagnetic valve. The control unit 40 can be connected with the pressure reducing valve 23 and the air outlet valve 24, and controls the purging unit 20 by adjusting the pressure output of the pressure reducing valve 23, the on-off of the air outlet valve 24 and the like.

The cleaning unit 30 is connected with the sampling feed line 13, and cleaning of each part of the sampling unit 10 is realized by conveying cleaning liquid into the sampling unit 10. Cleaning unit 30 includes a cleaning fluid (not shown), preferably including but not limited to water, cleaning inlet line 31, inlet valve 32 and outlet valve 33, which effect cleaning of sampling unit 10 by delivering cleaning fluid into cleaning unit 30 and flowing into sampling unit 10. The cleaning liquid flows into the liquid inlet valve 32 and the liquid outlet valve 33 in sequence through the cleaning liquid inlet pipe 31 to the sampling liquid inlet pipe 13. The liquid inlet valve 32 is used for controlling the circulation of the cleaning liquid inlet pipeline 31, and the liquid outlet valve 33 is arranged at the end part of the cleaning liquid inlet pipeline 31 close to the sampling liquid inlet pipeline 13 and used for controlling the on-off between the cleaning unit 30 and the sampling unit 10. Preferably, the liquid inlet valve 32 is a two-way manual valve, and the liquid outlet valve 33 is a two-position two-way electromagnetic valve. The control unit 40 is connected to the outlet valve 33 for controlling the washing unit 30.

In addition, the cleaning solution can also flow into the sampling bottle 11 through the sampling feeding pipeline 13, on one hand, the residual material in the sampling unit 10 is washed into the sampling bottle 11, and the accumulation of sodium chloride particles in the material in the sampling unit 10 is avoided; on the other hand, the cleaning solution can enter the sampling bottle 11, so that the reactant heavier than the cleaning solution in the sampling bottle 11 is separated from the reactant lighter than the cleaning solution, the reactant is prevented from continuously reacting in the sampling bottle 11, and the sampling safety is ensured.

Further, in order to guarantee the safety of the interior sample of sampling bottle 11, the reactor sampling device that this application provided still includes sampling case 6, and sampling bottle 11 sets up in sampling case 6, and sampling unit 10 is connected with sampling bottle 11 through sampling case 6, sets up tail gas pipeline 61 on the sampling case 6, and tail gas pipeline 61 communicates with the tail gas system 51 of reactor 5, makes the gas of overflowing in the sampling case 6 export through tail gas pipeline 61. In addition, tail gas pipeline 61 can make sampling case 6 be in little negative pressure state, has avoided poisonous and harmful gas to spill over, has ensured sample operating personnel's safety.

Further, a first control valve 131 and a second control valve 132 are provided in sequence on the sampling feed line 13 between the reactor 5 and the sampling pump 12, and a fluid control unit is provided between the first control valve 131 and the second control valve 132. Preferably, the sampling feed line 13 is connected with a first control valve 131, a purge unit 20, a cleaning unit 30 and a second control valve 132 in sequence along the sampling output direction, and the first control valve 131 and the second control valve 132 are two-position two-way solenoid valves.

Fig. 2 is a flow chart illustrating a working process of a reactor sampling device according to an embodiment of the present invention, in which the sampling pipeline needs to be cleaned by blowing before sampling so that the sampling pipeline is in a smooth state; after sampling is finished, cleaning a sampling pipeline to flush sampling residues, and simultaneously sealing the sample by using a cleaning solution; and finally, blowing and cleaning are carried out so as to blow the cleaning solution into the sampling bottle and ensure that the sampling pipeline is dry. Specifically, the method comprises the following steps:

s1: starting sampling;

referring to fig. 1, the operator mounts the sampling bottle 11 on the sampling port in the sampling box 6, manually opens the air inlet valve 22 on the purge unit 20, cleans the liquid inlet valve 32 on the unit 30, and then starts the reactor sampling device on the operation panel of the control unit 40. At this time, the reactor sampling device is in an initial state, which can be seen in fig. 10 specifically as a schematic diagram of an initial state valve position of the reactor sampling device in an embodiment of the present invention.

S2: purging the purging unit for the first time;

the control unit 40 controls the air outlet valve 24 and the first control valve 131 in the purging unit 20 to be opened, the liquid outlet valve 33 and the second control valve 132 on the cleaning unit 30 are closed, the sampling pipeline inlet pipeline is blown back by air, particles accumulated at the sampling pipeline inlet are prevented from blocking the sampling pipeline, and the sampling pipeline is ensured to be smooth. Preferably, the one-time purge time is set to 10 seconds. Specifically, fig. 3 is a schematic view of a primary purge valve position of a sampling pipeline of a sampling device of a reactor according to an embodiment of the present invention.

S3: material circulation of a sampling unit;

after the primary air purging time reaches a set value, the control unit 40 closes the air outlet valve 24 in the purging unit 20, opens the second control valve 132 at the inlet of the sampling pump 12, and simultaneously, the sampling bypass line 16 is communicated with the sampling discharge line 14 and the sampling return line 15 by using the connecting valve 161 and the connecting valve 162 at the two ends of the sampling bypass line 16, and then the sampling pump 12 is started, so that the sampling material returns to the reactor 5 after passing through the sampling feed line 13, the sampling discharge line 14, the sampling bypass line 16 and the sampling return line 15, thereby ensuring that the sampling material can truly represent the reactant of the reactor 5, and preferably, the material circulation time is set to 20 seconds. Specifically, fig. 4 is a schematic view of a material circulation valve position of a sampling device of a reactor according to an embodiment of the present invention.

S4: a sampling unit extracts a sample;

after the sampling material circulation time reaches the set value, the control unit 40 controls the

connection valves

161 and 162 at the inlet and outlet of the sampling bottle to disconnect the sampling bypass line 16 and keep the sampling discharge line 14 communicated with the sampling bottle 11, and the sampling bottle 11 is communicated with the sampling return line 15, so that the material enters the sampling bottle 11, and the sampling time is set according to the volume of the sampling bottle 11, preferably, the sampling time is set to 30 seconds. Specifically, fig. 5 is a schematic view of a sample extraction valve position of a sampling device of a reactor according to an embodiment of the present invention.

S5: a cleaning unit flushes the pipeline;

after the sampling time of the extracted sample reaches a set value, the control unit 40 stops the operation of the sampling pump 12, closes the first control valve 131 close to the outlet of the reactor 5, opens the liquid outlet valve 33 on the cleaning unit 30, and the cleaning water enters the sampling bottle 11 through the second control valve 132 at the inlet of the sampling pump 12, the sampling discharge pipeline 14 and the connecting valve 161, and washes the residual material in the sampling pipeline into the sampling bottle 11, so as to prevent the accumulation of particles such as sodium chloride in the material in the sampling pipeline, and meanwhile, the cleaning water enters the sampling bottle 11, so that the reactant heavier than water and the reactant lighter than water in the sampling bottle 11 are separated by a water layer, thereby preventing the reactants from continuously reacting in the sampling bottle 11, and ensuring the sampling safety. Preferably, the sample material flush time is set to 20 seconds. In particular, fig. 6 shows a schematic view of a flushing pipeline valve position of a sampling device of a reactor according to an embodiment of the present invention.

S6: secondary purging by the purging unit;

after the sample material rinsing time reaches the set value, the control unit 40 closes the liquid outlet valve 33 of the cleaning unit 30, opens the air outlet valve 24 on the purging unit 20, and air enters the sample feeding pipeline 13 through the air outlet valve 24, and enters the sample bottle 11 through the second control valve 132 at the inlet of the sample pump 12, the sample discharging pipeline 14 and the connecting valve 161, so that the residual cleaning water in the sample pipeline is purged to the sample bottle 11, and the sample pipeline is ensured to be dry. Preferably, the secondary purge time is set to 5 seconds. In particular, fig. 7 is a schematic view of a secondary purge valve position of a sampling device of a reactor according to an embodiment of the present invention.

S7 end of sampling

After the secondary purging is completed, the residual liquid in the sampling unit 10 can be collected in the sampling bottle 11, and the sampling can be finished at this time. The control unit 40 closes the gas outlet valve 24 of the purge unit 20 and the second control valve 132 at the inlet of the sampling pump 11 to complete the sampling, and the reactor sampling device returns to the initial state to wait for the next sampling command. In particular, fig. 10 is a schematic view of an initial state valve position of a sampling device of a reactor according to an embodiment of the present invention.

It should be noted that, in the secondary purging process, a designer can perform the residual liquid cleaning by setting the secondary purging duration time, and can also perform the secondary purging process for multiple times, so as to complete the residual liquid cleaning in the pipeline.

Further, at step S6: after the secondary purging of the purging unit, the following steps can be added to respectively clean the residual liquid in the sampling bypass pipeline 16 and the sampling feed pipeline 13 back to the reactor 5, and the method specifically comprises the following steps:

s8: purging a sampling pipeline for three times;

after the secondary purging time of the sampling pipeline reaches a set value, the control unit 40 controls the connection valve 161 and the connection valve 162 to disconnect the connection with the sampling bottle 11, and opens the connection with the sampling bypass pipeline 16, so that the air passes through the second control valve 132 at the inlet of the sampling pump 12, the sampling discharge pipeline 14, the sampling bypass pipeline 16 and the sampling return pipeline 15, and the residual materials in the sampling pipeline are purged into the reactor 5, thereby ensuring the cleanness and dryness of the sampling pipeline. Preferably, the three-time purge time is set to 10 seconds. In particular, fig. 8 is a schematic view of a three-time purge valve position of a sampling device of a reactor according to an embodiment of the present invention.

S9: purging the sampling pipeline for four times;

after the time for purging the sampling pipeline for three times reaches the set value, the control unit 40 closes the second control valve 132 at the inlet of the sampling pump 12, opens the first control valve 131 at the outlet of the reactor 5, and air enters the reactor 5 through the first control valve 131 and the sampling feeding pipeline 13 to purge the residual material in the sampling feeding pipeline 13 into the reactor 5, thereby ensuring the sampling inlet pipeline to be clean and dry. Preferably, the four purge times are set to 5 seconds. Specifically, fig. 9 is a schematic diagram of the four-time purge valve position of the sampling device of the reactor according to an embodiment of the present invention.

Finally, step S7 is repeated to end the sampling.

It should be noted that the purging of the sampling pipeline in steps S6-S8 is for cleaning the residual liquid in each branch pipeline of the sampling unit 10, and four purges are only a preferred embodiment, and do not mean that the sampling device of the reactor provided in the present application must perform four purges, and those skilled in the art can set the appropriate purging route and purging times according to actual needs.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A reactor sampling device, comprising:

the sampling unit comprises a sampling bottle, a sampling pump, a sampling feeding pipeline, a sampling discharging pipeline, a sampling return pipeline and a sampling bypass pipeline, wherein the sampling feeding pipeline is connected with the reactor and the sampling pump, the sampling discharging pipeline is connected with the sampling pump and the sampling bottle, the sampling return pipeline is connected with the sampling bottle and the reactor, the sampling bypass pipeline is connected with the sampling discharging pipeline and the sampling return pipeline, and a connecting valve is arranged between the sampling bypass pipeline and the sampling discharging pipeline as well as between the sampling bypass pipeline and the sampling return pipeline;

the fluid control unit is connected with the sampling feeding pipeline, a first control valve and a second control valve are arranged on the sampling feeding pipeline, and the fluid control unit is arranged between the first control valve and the second control valve.

2. The reactor sampling device of claim 1, wherein the fluid control unit comprises a purge unit comprising a purge gas and a purge gas inlet line, the purge gas inlet line connecting the sample feed line, the purge gas entering the sample feed line through the purge gas inlet line.

3. The reactor sampling device of claim 2, wherein the purge unit further comprises an air outlet valve and a pressure reducing valve, the air outlet valve and the pressure reducing valve are disposed on the purge inlet line, and the purge gas enters the sampling feed line through the pressure reducing valve and the air outlet valve.

4. The reactor sampling device of claim 1, wherein the fluid control unit comprises a cleaning unit comprising a cleaning fluid and a cleaning fluid inlet line, the cleaning fluid inlet line being connected to the sampling fluid inlet line, the cleaning fluid entering the sampling fluid inlet line through the cleaning fluid inlet line.

5. The reactor sampling device of claim 4, wherein the cleaning unit further comprises an effluent valve disposed on the cleaning feed line, the cleaning solution flowing through the effluent valve into the sampling feed line.

6. The reactor sampling device of claim 1, wherein the first control valve and the second control valve comprise two-position, two-way solenoid valves.

7. The reactor sampling device of claim 1, wherein the connection valve comprises a two-position three-way solenoid valve.

8. The reactor sampling device of claim 1, further comprising a control unit that controls the on and off of the sampling unit and the fluid control unit.

9. The reactor sampling device of claim 1, wherein the sampling pump comprises a diaphragm pump.

10. The reactor sampling device of any one of claims 1-9, further comprising a sampling tank, wherein the sampling bottle is disposed in the sampling tank, and a tail gas pipeline is disposed on the sampling tank and is communicated with a tail gas system of the reactor.