CN214346487U

CN214346487U - Hydrogen recycling device in benzene hydrogenation production process

Info

Publication number: CN214346487U
Application number: CN202120118828.2U
Authority: CN
Inventors: 管明星; 李云龙; 刘宏敏; 贾腾飞; 宋建国; 沈立明; 安金融; 张宏文; 叶树岭; 汪振
Original assignee: Ningxia Tianyuan Petrochemical Co ltd
Current assignee: Ningxia Tianyuan Petrochemical Co ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-10-08
Anticipated expiration: 2031-01-18

Abstract

A hydrogen recycling device in a benzene hydrogenation production process comprises: the shell, the hydrogen tank, the benzene hydrogenation retort, the hydrogen filters jar, the hydrogen compressor, the hydrogen tank, benzene hydrogenation retort and hydrogen filter jar all set up in shell inner wall bottom, the hydrogen compressor sets up in shell inner wall top, hydrogen tank top plug is connected with the gas-supply pipe, the gas-supply pipe other end and one side bottom plug of benzene hydrogenation retort are connected, the hydrogen tank, the benzene hydrogenation retort, the hydrogen filter jar and the hydrogen compressor all connect two liang through the gas-supply pipe, every gas-supply pipe plug is connected with the gas check valve, hydrogen filter jar inner wall bottom is equipped with the primary filter jar, one side that the hydrogen filter jar is close to the primary filter jar runs through and is connected with the air inlet, air inlet and gas-supply pipe fixed connection, through increasing the process step of filtering purification, thereby increasing the purity of the secondary used hydrogen and further increasing the effect improvement of the subsequent benzene hydrogenation processing.

Description

Hydrogen recycling device in benzene hydrogenation production process

Technical Field

The utility model relates to a benzene hydrogenation production technology technical field, concretely relates to hydrogen cyclic utilization device in benzene hydrogenation production technology.

Background

In the production of benzene hydrogenation, hydrogen is continuously added into crude benzene, so that hydrogen is continuously supplemented in a reaction tank, so that the reaction can be smoothly carried out, and substances such as high-purity benzene, nitration grade toluene, xylene, non-aromatic hydrocarbon, solvent oil and the like are produced.

At present, when hydrogen is recycled, the hydrogen is generally only subjected to simple filtration, so that the purity of the hydrogen used for the second time is not high, the processing effect of subsequent benzene hydrogenation is reduced, the safety is reduced due to the fact that other gases are doped in waste gas, the hydrogen is used as an inflammable and explosive active gas, and in the production process of the benzene hydrogenation, if gas leakage and high pressure or low pressure occur, staff cannot be reminded in the first time, and the danger is improved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is when carrying out cyclic utilization to hydrogen at present, only through simple filtration usually, consequently make the purity of the hydrogen of secondary use not high, thereby the processing effect of follow-up benzene hydrogenation has been reduced, and doping other gas in the waste gas and also making the security reduce, and hydrogen is as an inflammable and explosive active gas, in the production process of benzene hydrogenation, can danger very when taking place gas leakage and high pressure or low pressure, can not the very first time remind the staff, thereby danger has been improved, for this reason, provide a hydrogen cyclic utilization device in the benzene hydrogenation production technology.

The utility model provides a technical scheme that technical problem adopted is: a hydrogen recycling device in a benzene hydrogenation production process comprises: the device comprises a shell, a hydrogen tank, a benzene hydrogenation reaction tank, a hydrogen filtration tank and a hydrogen compressor, wherein the hydrogen tank, the benzene hydrogenation reaction tank and the hydrogen filtration tank are all arranged at the bottom of the inner wall of the shell, the hydrogen compressor is arranged at the top of the inner wall of the shell, the top of the hydrogen tank is connected with a gas pipe in a plugging manner, the other end of the gas pipe is connected with the bottom of one side of the benzene hydrogenation reaction tank in a plugging manner, the hydrogen tank, the benzene hydrogenation reaction tank, the hydrogen filtration tank and the hydrogen compressor are connected in pairs through gas pipes, each gas pipe is connected with a gas check valve in a plugging manner, the bottom of the inner wall of the hydrogen filtration tank is provided with a primary filtration tank, one side of the hydrogen filtration tank close to the primary filtration tank is connected with a gas inlet in a penetrating manner, the gas inlet is fixedly connected with the gas pipes, one side of the inner wall of the hydrogen filtration tank far away from the gas inlet is connected with a liquid inlet pipe in a penetrating manner, and one end of the liquid inlet pipe is fixedly connected with an atomization nozzle, the hydrogen filters bottom of the tank portion one side and has seted up the waste water outlet, the hydrogen filters the inner wall fixedly connected with baffle that the jar is close to the atomizer top, a plurality of air vent has been seted up on the baffle surface, the hydrogen filters the jar and is close to the baffle below, the hydrogen filters the inner wall fixedly connected with filter layer that the jar is close to the baffle top, the hydrogen filters the inner wall fixedly connected with palladium rete that the jar is close to the filter layer top, the hydrogen filters the jar top and has seted up the hydrogen export.

The hydrogen filters one side inner wall plug-in connection that the jar is close to palladium rete below and is connected with the waste gas export, the waste gas export is connected with the gas check valve plug-in, the one end fixedly connected with waste gas jar that the jar was filtered to hydrogen is kept away from to the waste gas export.

The hydrogen tank top fixedly connected with pressure sensor, shell inner wall fixedly connected with a plurality of gas sensor, shell top outer wall fixedly connected with alarm, pressure sensor and gas sensor all with alarm electric connection.

The hydrogen outlet is connected with the gas pipe in a plugging manner, one side of the top of the hydrogen filtering tank, which is close to the gas pipe, is fixedly connected with an air pumping bin, an air pumping pump is bolted inside the air pumping bin, and the output end of the air pumping pump is connected with the gas pipe in a plugging manner.

A plurality of the gas-supply pipe and the plug-in connection of the waste gas outlet are all provided with a sealing ring.

The utility model has the advantages of it is following:

the utility model discloses a process step that will filter the purification increases, thereby it is higher to increase the purity of the hydrogen of secondary use, and then the effect that has increased follow-up benzene hydrogenation and processing improves, and it is used for storing useless gas to set up the waste gas tank in one side of filtering the jar, thereby benzene hydrogenation's security has been increased, and detect hydrogen tank and shell inside respectively through pressure sensor and gas sensor, make no matter be the inside atmospheric pressure change of hydrogen tank, still each part takes place the gas leakage condition and can all pass through the alarm notice manual work the very first time, thereby reduce dangerous assurance personnel safety.

Drawings

Fig. 1 is a front view of a preferred embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a hydrogen filter tank according to a preferred embodiment of the present invention;

fig. 3 is an enlarged schematic structural diagram of a preferred embodiment of the present invention.

Description of reference numerals: 1. a housing; 2. a hydrogen tank; 3. a gas delivery pipe; 4. a benzene hydrogenation reaction tank; 5. a hydrogen filtration tank; 6. a hydrogen compressor; 7. a gas check valve; 8. an air inlet; 9. A liquid inlet pipe; 10. an atomizing spray head; 11. a waste water outlet; 12. a partition plate; 13. a vent hole; 14. A primary filtration tank; 15. a filter layer; 16. a palladium membrane layer; 17. a hydrogen outlet; 18. an exhaust gas outlet; 19. an exhaust gas tank; 20. a pressure sensor; 21. a gas sensor; 22. an alarm; 23. an air pumping bin; 24. an air pump.

Detailed Description

The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1-3, a hydrogen recycling apparatus for benzene hydrogenation production process includes: the shell 1, the hydrogen tank 2, the benzene hydrogenation reaction tank 4, the hydrogen filtering tank 5 and the hydrogen compressor 6, wherein the hydrogen tank 2, the benzene hydrogenation reaction tank 4 and the hydrogen filtering tank 5 are all arranged at the bottom of the inner wall of the shell 1, the hydrogen compressor 6 is arranged at the top of the inner wall of the shell 1, the top of the hydrogen tank 2 is connected with a gas pipe 3 in a plugging and pulling way, the other end of the gas pipe 3 is connected with the bottom of one side of the benzene hydrogenation reaction tank 4 in a plugging and pulling way, the hydrogen tank 2, the benzene hydrogenation reaction tank 4, the hydrogen filtering tank 5 and the hydrogen compressor 6 are connected in pairs through the gas pipe 3, each gas pipe 3 is connected with a gas check valve 7 in a plugging and pulling way, the bottom of the inner wall of the hydrogen filtering tank 5 is provided with a primary filtering tank 14, one side of the hydrogen filtering tank 5 close to the primary filtering tank 14 is connected with a gas inlet 8 in a penetrating way, the gas inlet 8 is fixedly connected with the gas pipe 3, one side of the inner wall of the hydrogen filtering tank 5 far away from the gas inlet 8 is connected with a liquid inlet pipe 9 in a penetrating way, 9 one end fixedly connected with atomizer 10 of inlet tube, waste water outlet 11 has been seted up to hydrogen filtration jar 5 bottom one side, hydrogen filters the inner wall fixedly connected with baffle 12 that jar 5 is close to atomizer 10 top, a plurality of air vent 13 has been seted up on baffle 12 surface, hydrogen filters jar 5 and is close to baffle 12 below, hydrogen filters the inner wall fixedly connected with filter layer 15 that jar 5 is close to baffle 12 top, hydrogen filters the inner wall fixedly connected with palladium membrane layer 16 that jar 5 is close to filter layer 15 top, hydrogen filters 5 tops of jar and has seted up hydrogen outlet 17, process steps through will filtering the purification increase, thereby it is higher to increase the purity of the hydrogen of secondary use, and then the effect that has increased follow-up benzene hydrogenation processing.

The plugging connection parts of the gas pipes 3 and the waste gas outlets 18 are respectively provided with a sealing ring, the sealing performance of the device is ensured to reduce accidents, one side inner wall of the hydrogen filtering tank 5, which is close to the lower part of the palladium membrane layer 16, is connected with the waste gas outlet 18 in a plugging manner, the waste gas outlet 18 is connected with the gas check valve 7 in a plugging manner, one end of the waste gas outlet 18, which is far away from the hydrogen filtering tank 5, is fixedly connected with the waste gas tank 19, which can separate hydrogen from other gases, so as to improve the purity of hydrogen circulation, the top of the hydrogen tank 2 is fixedly connected with the pressure sensor 20, the inner wall of the shell 1 is fixedly connected with the plurality of gas sensors 21, the outer wall of the top of the shell 1 is fixedly connected with the alarm 22, the pressure sensor 20 and the gas sensor 21 are electrically connected with the alarm 22, the device is monitored in real time through the pressure sensor 20 and the gas sensor 21, so that the safety of the device is improved, and the hydrogen outlets 17 are connected with the gas pipes 3 in a plugging manner, one side fixedly connected with air extraction bin 23 that 5 tops of hydrogen filter tank are close to gas-supply pipe 3, and air extraction bin 23 inside bolt has aspiration pump 24, and the 24 output of aspiration pump is connected with 3 plug of gas-supply pipe, and hydrogen is lighter gas, can carry out rapid transport and quickly separating to hydrogen through aspiration pump 24.

Specifically, a hydrogen tank 2 enters a benzene hydrogenation reaction tank 4 through a gas pipe 3, then waste gas enters a hydrogen filter tank 5 through the gas pipe 3 above the benzene hydrogenation reaction tank 4, hydrogen enters the hydrogen filter tank 5 through a gas inlet 8, then a downcomer is connected into a liquid inlet pipe 9 to start water injection, then the waste water is sprayed out through an atomizing nozzle 10, the atomizing nozzle 10 sprays out liquid to attach heavy impurities and oil stains to fall, then waste water is discharged through a waste water outlet 11, the hydrogen floats upwards due to light hydrogen, the hydrogen performs secondary filtration through a vent hole 13 on a partition plate 12, the hydrogen and other gases perform secondary filtration through a filter layer 15, then air extraction is started through an air extraction pump 24, the hydrogen is lighter than other gases, so the hydrogen can quickly move upwards, and then the turbid gas completes separation of the hydrogen and other gases through a heated palladium membrane layer 16 (the hydrogen can easily permeate the palladium membrane, and the other gases are not permeable, so that the palladium membrane becomes an excellent hydrogen separator and purifier), then the other gases enter the waste gas tank 19 through the waste gas outlet 18, the hydrogen is sent to the hydrogen compressor 6 through the gas pipe 3 by the air pump 24 to be pressurized and then sent to the hydrogen tank 2 to complete circulation, when the pressure of the hydrogen tank 2 is too high or too low, the pressure sensor 20 (the pressure sensor 20 is the prior art, and can be referred to as model ZZ310-080 and the like specifically) detects that the pressure is abnormal, and the alarm 22 gives an alarm if the shell 1 leaks hydrogen, and at the moment, the gas sensor 21 (the gas sensor 21 is the prior art, and can be referred to model QB10N and the like) detects that the hydrogen content is too high, the alarm 22 gives an alarm.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Other parts not described in detail in the present invention belong to the prior art, and are not described herein again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A hydrogen cyclic utilization device in a benzene hydrogenation production process is characterized by comprising: the shell (1), the hydrogen tank (2), the benzene hydrogenation reaction tank (4), the hydrogen filtering tank (5) and the hydrogen compressor (6), wherein the hydrogen tank (2), the benzene hydrogenation reaction tank (4) and the hydrogen filtering tank (5) are all arranged at the bottom of the inner wall of the shell (1), the hydrogen compressor (6) is arranged at the top of the inner wall of the shell (1), the top of the hydrogen tank (2) is connected with a gas pipe (3) in a plugging manner, the other end of the gas pipe (3) is connected with the bottom of one side of the benzene hydrogenation reaction tank (4) in a plugging manner, the hydrogen tank (2), the benzene hydrogenation reaction tank (4), the hydrogen filtering tank (5) and the hydrogen compressor (6) are connected in a pairwise manner through the gas pipe (3), each gas pipe (3) is connected with a gas check valve (7) in a plugging manner, the bottom of the inner wall of the hydrogen filtering tank (5) is provided with a first-stage filtering tank (14), one side of the hydrogen filtering tank (5) close to the primary filtering tank (14) is connected with an air inlet (8) in a penetrating way, the air inlet (8) is fixedly connected with an air conveying pipe (3), one side of the inner wall of the hydrogen filtering tank (5) far away from the air inlet (8) is connected with an inlet pipe (9) in a penetrating way, one end of the inlet pipe (9) is fixedly connected with an atomizing spray nozzle (10), one side of the bottom of the hydrogen filtering tank (5) is provided with a waste water outlet (11), the inner wall of the hydrogen filtering tank (5) close to the upper part of the atomizing spray nozzle (10) is fixedly connected with a partition plate (12), the surface of the partition plate (12) is provided with a plurality of air vents (13), the hydrogen filtering tank (5) is close to the lower part of the partition plate (12), the inner wall of the hydrogen filtering tank (5) close to the upper part of the partition plate (12) is fixedly connected with a filter layer (15), the hydrogen filtering tank (5) is close to the inner wall of the upper part of the filter layer (15) and is fixedly connected with a palladium membrane layer (16), the top of the hydrogen filtering tank (5) is provided with a hydrogen outlet (17).

2. The hydrogen recycling device in the benzene hydrogenation production process according to claim 1, wherein the inner wall of one side of the hydrogen filter tank (5) close to the lower part of the palladium membrane layer (16) is connected with a waste gas outlet (18) in a plugging manner, the waste gas outlet (18) is connected with the gas check valve (7) in a plugging manner, and one end of the waste gas outlet (18) far away from the hydrogen filter tank (5) is fixedly connected with a waste gas tank (19).

3. The hydrogen recycling device in the benzene hydrogenation production process according to claim 1, wherein a pressure sensor (20) is fixedly connected to the top of the hydrogen tank (2), a plurality of gas sensors (21) are fixedly connected to the inner wall of the shell (1), an alarm (22) is fixedly connected to the outer wall of the top of the shell (1), and the pressure sensor (20) and the gas sensors (21) are electrically connected to the alarm (22).

4. The hydrogen recycling device in the benzene hydrogenation production process according to claim 1, wherein the hydrogen outlet (17) is connected with the gas pipe (3) in a plugging manner, one side of the top of the hydrogen filter tank (5) close to the gas pipe (3) is fixedly connected with a gas pumping bin (23), a gas pumping pump (24) is bolted in the gas pumping bin (23), and the output end of the gas pumping pump (24) is connected with the gas pipe (3) in a plugging manner.

5. The hydrogen recycling device in the benzene hydrogenation production process according to claim 1, wherein the plugging connection positions of the gas transmission pipes (3) and the waste gas outlet (18) are provided with sealing rings.