Sampling device of catalytic reaction kettle

Abstract

The utility model discloses a sampling device of a catalytic reaction kettle. The sampling device comprises a discharge pipe, a sampling pipe and a sampling pipe, wherein the head end of the discharge pipe is communicated with the bottom of the catalytic reaction kettle through a first valve; a liquid inlet of the circulating pump is communicated with the tail end of the discharging pipe; the head end of the return pipe is communicated with the liquid outlet of the circulating pump, and the tail end of the return pipe is communicated with the upper cavity of the catalytic reaction kettle through a second valve; the negative pressure sampling assembly is communicated with the material return pipe through a third valve; an air inlet of the back flushing pump is communicated with the upper cavity of the catalytic reaction kettle through a fourth valve, and an air outlet of the back flushing pump is communicated with the discharging pipe through a first multi-way valve; an inlet of the cleaning pump is communicated with a cleaning medium, and an outlet is communicated with the discharging pipe through a second multi-way valve; and the cleaning medium discharge pipe is communicated with the tail end of the material return pipe through a third multi-way valve. According to the utility model, multiple times of sampling can be completed on the premise of not destroying the internal environment of the reaction kettle and not increasing impurities.

Description

Technical Field

[0001] The utility model relates to the field of sampling under pressure and maintaining purity, and specifically relates to a sampling device for a catalytic reaction kettle. Background Art

[0002] At present, the industrial production of biochemical products generally uses a reaction kettle as a reaction vessel, which has good safety, airtightness and temperature controllability. In the preparation of some biological products such as biological enzymes or reactions involving enzymes (as catalysts), compared with conventional pure chemical reactions, there are advantages of higher reaction efficiency and lower cost.

[0003] For reactions involving enzymes, compared with most conventional pure chemical reaction processes, there are higher requirements for the internal pressure, temperature, gas purity, liquid purity, etc. of the reaction kettle during the reaction. At the same time, in order to monitor the reaction situation in the reaction kettle and the final reaction detection, it is necessary to sample the reaction kettle during the reaction process. Therefore, it is necessary to complete multiple samplings without destroying the internal environment of the reaction kettle and without adding impurities. At present, there is no sampling system on the market that can be reused for multiple batches of reactions without affecting the internal environment of the reaction kettle and without adding impurities during multiple samplings. Summary of the Utility Model

[0004] In view of the above-mentioned defects of the prior art, the purpose of the present utility model is to provide a sampling device for a catalytic reaction kettle, which can complete multiple samplings without destroying the internal environment of the reaction kettle and without adding impurities.

[0005] The purpose of the present utility model is achieved through the following technical solutions:

[0006] A sampling device for a catalytic reaction kettle, comprising:

[0007] A discharge pipe, the head end of which is communicated with the bottom of the catalytic reaction kettle through a first valve;

[0008] A circulation pump, the liquid inlet of which is communicated with the tail end of the discharge pipe;

[0009] A return pipe, the head end of which is communicated with the liquid outlet of the circulation pump, and the tail end of which is communicated with the upper cavity of the catalytic reaction kettle through a second valve;

[0010] A negative pressure sampling assembly, which is communicated with the return pipe through a third valve;

[0011] A backflush pump, the air inlet of which is communicated with the upper cavity of the catalytic reaction kettle through a fourth valve, and the air outlet of which is communicated with the discharge pipe through a first multi-way valve;

[0012] A cleaning pump, the inlet of which is communicated with a cleaning medium, and the outlet of which is communicated with the discharge pipe through a second multi-way valve;

[0013] The cleaning medium discharge pipe is communicated with the tail end of the return pipe through a third multi-way valve.

[0014] Furthermore, the height at each position on the discharge pipe decreases as the distance between the discharge pipe and the bottom of the catalytic reactor increases;

[0015] The horizontal height of the connection between the backwashing pump and the discharge pipe is lower than the horizontal height of the connection between the cleaning pump and the discharge pipe.

[0016] Furthermore, the circulation pump is a centrifugal pump; the negative pressure sampling assembly includes:

[0017] A negative pressure pump, the air inlet of which is communicated with the discharge pipe or the return pipe through a fourth multi-way valve respectively;

[0018] A negative pressure sampling bottle, which is communicated with the return pipe through a third valve.

[0019] Furthermore, the negative pressure sampling assembly further includes a low-pressure bottle, which is communicated with the negative pressure sampling bottle through a fifth valve;

[0020] The third valve is a sixth multi-way valve, and a sixth valve and a seventh valve are respectively arranged at both ends of the sixth multi-way valve; the sixth multi-way valve is communicated with the upper cavity of the catalytic reactor through a flushing pipe.

[0021] Furthermore, the negative pressure sampling bottle is also communicated with the air inlet of the negative pressure pump through an eighth valve.

[0022] Furthermore, both ends of the fifth valve are communicated with the low-pressure bottle and the negative pressure sampling bottle through quick connectors; the negative pressure sampling bottle is communicated with the sixth multi-way valve and the eighth valve through two quick connectors respectively.

[0023] Furthermore, the air outlet of the backwashing pump is communicated with the first multi-way valve through a first one-way valve and a pressure tank in sequence; the inner diameters of the discharge pipe and the return pipe do not exceed 1 centimeter.

[0024] Furthermore, it further includes:

[0025] A quick-drying pipe, the tail end of which is communicated with the discharge pipe through a fifth multi-way valve;

[0026] A quick-drying pump, the outlet of which is communicated with the head end of the quick-drying pipe.

[0027] Furthermore, the end of the cleaning medium discharge pipe is connected to a gas-liquid treatment system.

[0028] Furthermore, the quick-drying pipe is communicated with the fifth multi-way valve through a filtering assembly.

[0029] Due to the adoption of the above technical solutions, the present utility model has the following advantages:

[0030] The liquid to be tested in the catalytic reactor is circulated in the discharge pipe and the return pipe through a circulation pump to stabilize the liquid to be tested. Then, the third valve is used to control the liquid to be tested to flow into the negative pressure sampling assembly under the action of negative pressure to complete negative pressure sampling. The whole process does not damage the substances and reaction conditions in the original catalytic reactor as much as possible.

[0031] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. Brief Description of the Drawings

[0032] The drawings of the present utility model are described as follows:

[0033] Figure 1 It is a schematic structural diagram of the sampling device for the catalytic reactor in this embodiment.

[0034] Figure 2 is Figure 1 the enlarged structural diagram at A in

[0035] In the figure: 1. Discharge pipe; 2. First valve; 3. Circulation pump; 4. Return pipe; 5. Second valve; 61. Negative pressure pump; 62. Fourth multi-way valve; 63. Negative pressure sampling bottle; 64. Low-pressure bottle; 65. Fifth valve; 66. Sixth multi-way valve; 67. Sixth valve; 68. Seventh valve; 69. Blowing pipe; 600. Eighth valve; 7. Third valve; 8. Back-blowing pump; 9. Fourth valve; 10. First multi-way valve; 11. Cleaning pump; 12. Second multi-way valve; 13. Cleaning medium discharge pipe; 14. Third multi-way valve; 15. First one-way valve; 16. Pressure tank; 17. Quick-drying pipe; 18. Fifth multi-way valve; 19. Quick-drying pump; 20. Gas-liquid treatment system; 21. Filter assembly; 100. Catalytic reactor. Detailed Description of the Embodiment

[0036] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0037] Embodiment:

[0038] As Figure 1 、 2 shown in the figure, a sampling device for a catalytic reactor 100 includes:

[0039] A discharge pipe 1, the head end of which is connected to the bottom of the catalytic reactor 100 through a first valve 2;

[0040] A circulation pump 3, the inlet of which is connected to the tail end of the discharge pipe 1;

[0041] The return pipe 4 has its head end connected to the liquid outlet of the circulation pump 3, and its tail end is connected to the upper cavity of the catalytic reactor 100 through the second valve 5;

[0042] The negative pressure sampling assembly is connected to the return pipe 4 through the third valve 7;

[0043] The backwashing pump 8 has its air inlet connected to the upper cavity of the catalytic reactor 100 through the fourth valve 9, and its air outlet is connected to the discharge pipe 1 through the first multi-way valve 10;

[0044] The cleaning pump 11 has its inlet connected to the cleaning medium, and its outlet is connected to the discharge pipe 1 through the second multi-way valve 12;

[0045] The cleaning medium discharge pipe 13 is connected to the tail end of the return pipe 4 through the third multi-way valve 14.

[0046] The circulation pump 3 circulates the liquid to be measured in the catalytic reactor 100 in the discharge pipe 1 and the return pipe 4 to stabilize the liquid to be measured. Then, the third valve 7 is used to control the liquid to be measured to flow into the negative pressure sampling assembly under negative pressure to complete the negative pressure sampling. The whole process does not damage the substances and reaction conditions in the original catalytic reactor 100 as much as possible.

[0047] In this embodiment, the height of each position on the discharge pipe 1 decreases as the distance between the discharge pipe 1 and the bottom of the catalytic reactor 100 increases;

[0048] The horizontal height of the connection between the backwashing pump 8 and the discharge pipe 1 is lower than the horizontal height of the connection between the cleaning pump 11 and the discharge pipe 1.

[0049] Such a design can enable the pipeline between the backwashing pump 8 and the cleaning pump 11 to be cleaned by the cleaning medium injected by the cleaning pump 11. At the same time, the cleaning medium and the liquid to be measured will not remain in the discharge pipe 1 and can be completely cleaned, ensuring the cleanliness of the discharge pipe 1.

[0050] In this embodiment, the circulation pump 3 is a centrifugal pump; the negative pressure sampling assembly includes:

[0051] The negative pressure pump 61 has its air inlet connected to the discharge pipe 1 or the return pipe 4 through the fourth multi-way valve 62 respectively;

[0052] The negative pressure sampling bottle 63 is connected to the return pipe 4 through the third valve 7.

[0053] The negative pressure pump 61 can evacuate the gas in the discharge pipe 1 and the return pipe 4 before sampling, reducing the external gas finally entering the reactor.

[0054] In this embodiment, the negative pressure sampling assembly further includes a low-pressure bottle 64, which is connected to the negative pressure sampling bottle 63 through the fifth valve 65;

[0055] The third valve 7 is the sixth multi-way valve 66. The two ends of the sixth multi-way valve 66 are respectively provided with a sixth valve 67 and a seventh valve 68. The sixth multi-way valve 66 is communicated with the upper cavity of the catalytic reactor 100 through a purge pipe 69.

[0056] After the liquid to be measured enters the negative pressure sampling bottle 63, since the entire negative pressure sampling bottle 63 is located at the lower part of the reactor, a certain pressure will be generated inside it. At this time, direct separation will cause the liquid to overflow, or when the negative pressure sampling bottle 63 is placed in the laboratory and opened, a small amount of liquid will spray out because the pressure is greater than the atmospheric pressure. The low-pressure bottle 64 can be connected to the negative pressure sampling bottle 63 after sampling is closed to reduce the pressure.

[0057] The sixth multi-way valve 66 can reduce the pipeline. When the sixth valve 67 and the seventh valve 68 are closed, and the sixth multi-way valve 66 is communicated with the purge pipe 69, the residual liquid in the sixth multi-way valve 66 can be brought into the negative pressure sampling bottle 63 when the low-pressure bottle 64 is communicated with the negative pressure sampling bottle 63, so that there will be no dripping leakage when the negative pressure sampling bottle 63 is separated from the sixth multi-way valve 66.

[0058] In this embodiment, the negative pressure sampling bottle 63 is also communicated with the air inlet of the negative pressure pump 61 through an eighth valve 600.

[0059] The negative pressure sampling bottle 63 can be directly evacuated, reducing the operation of pre-evacuating the negative pressure sampling bottle 63 in advance.

[0060] In this embodiment, the two ends of the fifth valve 65 are communicated with the low-pressure bottle 64 and the negative pressure sampling bottle 63 through quick connectors. The negative pressure sampling bottle 63 is communicated with the sixth multi-way valve 66 and the eighth valve 600 respectively through two quick connectors.

[0061] The quick connector connection can facilitate sampling.

[0062] In this embodiment, the air outlet of the backflush pump 8 is sequentially communicated with the first multi-way valve 10 through a first one-way valve 15 and a pressure tank 16. The inner diameters of the discharge pipe 1 and the return pipe 4 do not exceed 1 cm. An inner diameter lower than 1 cm can push all the liquid away under the action of high-pressure air flow, avoiding liquid accumulation in the return pipe 4.

[0063] In this embodiment, it further includes:

[0064] A quick-drying pipe 17, the tail end of which is communicated with the discharge pipe 1 through a fifth multi-way valve 18;

[0065] A quick-drying pump 19, the outlet of which is communicated with the head end of the quick-drying pipe 17.

[0066] After cleaning the discharge pipe 1 and the return pipe 4, injecting clean gas can quickly restore the discharge pipe 1 and the return pipe 4 to a clean state, preparing for the next sampling.

[0067] In this embodiment, the end of the cleaning medium discharge pipe 13 is connected to the gas-liquid treatment system 20.

[0068] The cleaning medium injected by the cleaning pump 11, the liquid to be measured in the reaction kettle, and the clean gas injected by the clean and quick-drying pump 19 may contain harmful gases. At this time, the gas-liquid treatment system 20 is required to handle it. The gas-liquid treatment system 20 can use conventional gas treatment equipment on the market.

[0069] In this embodiment, the quick-drying pipe 17 is connected to the fifth multi-way valve 18 through the filter assembly 21.

[0070] If the gas injected into the quick-drying pipe 17 is ordinary air, only the filter assembly 21 needs to be set to filter the gas to obtain clean gas, without the need to purchase and prepare it separately, reducing costs.

[0071] The sampling device of the catalytic reaction kettle 100 in this embodiment is used as follows. Install the equipment as shown in Figure 1 、 2 . In this embodiment, all valves are electromagnetic control valves, reducing the amount of manual operation.

[0072] During sampling, install the negative-pressure sampling bottle 63 and the negative-pressure bottle. Close the first valve 2 and the second valve 5 to ensure that the entire discharge pipe 1 is unobstructed and only connected to the first valve 2 and the circulation pump 3 at both ends, and ensure that the entire return pipe 4 is unobstructed and only connected to the circulation pump 3 and the second valve 5. Open the eighth valve 600, the fifth valve 65, and the fourth multi-way valve 62 (connect the discharge pipe 1, and at the same time connect the discharge pipe 1 to the negative-pressure pump 61), then start the negative-pressure pump 61 to evacuate the discharge pipe 1, the return pipe 4, the negative-pressure sampling bottle 63, and the negative-pressure bottle. When a certain degree of vacuum is reached, close the eighth valve 600 and the fifth valve 65, control the fourth multi-way valve 62 to only keep the discharge pipe 1 connected, disconnect the connection with the negative-pressure pump 61, and then turn off the negative-pressure pump 61. Open the first valve 2 and the second valve 5, and then start the circulation pump 3 to work for a certain period of time to evenly distribute the liquid in the discharge pipe 1 and the return pipe 4. Then control the sixth multi-way valve 66 to connect the discharge pipe 1 to the negative-pressure sampling bottle 63. At this time, the liquid in the reaction kettle enters the negative-pressure sampling bottle 63. When the negative-pressure sampling bottle 63 is full, close the sixth valve 67 and the seventh valve 68, control the sixth multi-way valve 66 to connect the flushing pipe 69 to the negative-pressure sampling bottle 63, and then open the fifth valve 65. Under the action of the low-pressure bottle 64, the gas in the upper part of the reaction kettle flows through the flushing pipe 69 through the sixth multi-way valve 66 into the negative-pressure sampling bottle 63, so that less liquid remains at the three-dimensional four-way valve. Finally, control the sixth multi-way valve 66 to only connect the sixth valve 67 and the seventh valve 68, and then remove the negative-pressure sampling bottle 63.

[0073] After sampling is completed, close the first valve 2, open the backflush pump 8, and inject gas into the pressure tank 16 through the first one-way valve 15. When the pressure in the pressure tank 16 reaches the predetermined value, open the second multi-way valve 12, and the high-pressure gas enters the discharge pipe 1, pushing the liquid in the discharge pipe 1 to flow into the return pipe 4, and finally returning to the reaction kettle through the second valve 5. This operation can be performed multiple times to ensure that all the liquid returns to the reaction kettle.

[0074] During cleaning, close the connection between the first multi-way valve 10 and the pressure tank 16, close the second valve 5, open the cleaning medium discharge pipe 13, open the connection between the second multi-way valve 12 and the cleaning pump 11, and start the cleaning pump 11 to inject the cleaning medium (water or other liquid) into the discharge pipe 1 to clean and suck the discharge pipe 1 and the return pipe 4. The cleaning liquid is processed by the gas-liquid treatment system 20, and the liquid is collected to prevent environmental pollution.

[0075] After cleaning is completed, perform quick drying treatment. Close the cleaning pump 11, cut off the connection between the second multi-way valve 12 and the cleaning pump 11, open the connection between the fifth multi-way valve 18 and the filtration assembly 21, start the quick drying pump 19, inject clean air into the discharge pipe 1, evaporate or promote the rapid volatilization of the residual gas in the discharge pipe 1 and the return pipe 4 and then take it away. The gas is finally chemically or physically treated by the gas treatment part of the gas-liquid treatment system 20 and finally adsorbed by activated carbon and discharged into the atmosphere.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A catalytic reactor sampling device, characterized in that: include: A discharge pipe, the head end of which is connected to the bottom of the catalytic reactor through a first valve; A circulation pump, the liquid inlet of which is connected to the tail end of the discharge pipe; A return pipe, the head end of which is connected to the liquid outlet of the circulation pump, and the tail end of which is connected to the upper cavity of the catalytic reactor through a second valve; The negative pressure sampling assembly is connected to the return pipe through a third valve; A backflush pump, the air inlet of which is connected to the upper cavity of the catalytic reactor through a fourth valve, and the air outlet of which is connected to the discharge pipe through a first multi-way valve; A cleaning pump, the inlet of which is connected to the cleaning medium, and the outlet of which is connected to the discharge pipe through a second multi-way valve; The cleaning medium discharge pipe is connected to the tail end of the return pipe through the third multi-way valve.

2. The catalytic reactor sampling device according to claim 1, characterized in that: The height of each point on the discharge pipe decreases as the distance between the discharge pipe and the bottom of the catalytic reactor increases; The level of the connection point between the backflush pump and the discharge pipe is lower than the level of the connection point between the cleaning pump and the discharge pipe.

3. The catalytic reactor sampling device according to claim 2, characterized in that: The circulating pump is a centrifugal pump; the negative pressure sampling assembly comprises: The air inlet of the negative pressure pump is connected through the discharge pipe or the return pipe of the fourth multi-way valve; The negative pressure sampling bottle is connected to the return pipe through the third valve.

4. The catalytic reactor sampling device according to claim 2, characterized in that: The negative pressure sampling assembly also includes a low pressure bottle, which is connected to the negative pressure sampling bottle through a fifth valve; The third valve is a sixth multi-way valve, and a sixth valve and a seventh valve are respectively arranged at both ends of the sixth multi-way valve; the sixth multi-way valve is connected to the upper cavity of the catalytic reactor through a flushing pipe.

5. The catalytic reactor sampling device according to claim 4, characterized in that: The negative pressure sampling bottle is also connected to the air inlet of the negative pressure pump through the eighth valve.

6. The catalytic reactor sampling device according to claim 5, characterized in that: Both ends of the fifth valve are connected to the low-pressure bottle and the negative pressure sampling bottle through quick connectors; the negative pressure sampling bottle is connected to the sixth multi-way valve and the eighth valve through two quick connectors respectively.

7. The catalytic reactor sampling device according to claim 1, characterized in that: The air outlet of the back-blowing pump is connected to the first multi-way valve through the first one-way valve and the pressure tank in sequence; the inner diameters of the discharge pipe and the return pipe do not exceed 1 cm.

8. The catalytic reactor sampling device according to any one of claims 1 to 7, characterized in that: Also includes: The quick-drying pipe has a tail end connected to the discharge pipe through a fifth multi-way valve; The quick-drying pump has an outlet connected with the head end of the quick-drying pipe.

9. The catalytic reactor sampling device according to claim 8, characterized in that: The end of the cleaning medium discharge pipe is connected to a gas-liquid processing system.

10. The catalytic reactor sampling device according to claim 8, characterized in that: The quick-drying pipe is communicated with the fifth multi-way valve through the filter assembly.

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