CN216935378U

CN216935378U - Tetrahydrofuran tail gas recovery device

Info

Publication number: CN216935378U
Application number: CN202122878922.0U
Authority: CN
Inventors: 杨泽江; 杨国权; 夏锡兰; 颜泽清; 肖勇; 周晓辉
Original assignee: Dipon Luzhou Chemical Co ltd
Current assignee: Dipon Luzhou Chemical Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-07-12
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses a tetrahydrofuran tail gas recovery device, which comprises a recovery tower, wherein the recovery tower is provided with a middle section and an upper semicircular section and a lower semicircular section which are respectively combined at the upper part and the lower part of the middle section, the top of the inner side of the upper semicircular section is provided with an induced draft fan, a soft water spraying mechanism is arranged at the lower side of the induced draft fan and one side of the middle section, the other side of the middle section is provided with an induced draft cover assembly, the induced draft cover assembly is arranged at the upper side of the lower semicircular section, the center of the bottom in the lower semicircular section is provided with a liquid discharge pipe, the lower end of the liquid discharge pipe is provided with a three-way port, the rest port at one side of the three-way port is provided with a recovery pipe, and the rest port at the three-way port is provided with a treatment pipe. The utility model has reasonable integral design and strong practicability, realizes the recovery treatment of the tetrahydrofuran tail gas, and accelerates the recovery efficiency through the convection operation of the soft water and the tetrahydrofuran tail gas.

Description

Tetrahydrofuran tail gas recovery device

Technical Field

The utility model relates to the technical field of chemical devices related to tetrahydrofuran tail gas recovery, in particular to a tetrahydrofuran tail gas recovery device.

Background

Tetrahydrofuran, the full name of Tehtrahydrofuran in English, abbreviated as THF, is a heterocyclic organic compound, belongs to polar ether compounds, is a medium polar solvent commonly used in organic synthesis, is also a raw material for synthesizing medicines, and can be completely mixed with water at room temperature. Its boiling point under normal pressure is 65-66 deg.C, saturated vapor pressure is 15.20kPa (15 deg.C), and its volatility is strong at room temperature.

In the production process of tetrahydrofuran, the finished product is usually barreled. The used equipment of barrelling is automatic weighing liquid filling machine, fills nitrogen gas replacement steel drum air during the filling, and the spray gun inserts the bung hole, and tetrahydrofuran spouts from the spray gun fast, and the liquid level risees rapidly in the steel drum, and very fast joining speed causes the interior violent disturbance of liquid level of bucket, volatilizees with higher speed, and tetrahydrofuran gas and the covering nitrogen gas in the bucket rise along with the liquid level, spill over from the bung hole. Because tetrahydrofuran has the characteristics of higher saturated vapor pressure and volatility at normal temperature, a large amount of tetrahydrofuran volatilizes in a gas form in the barreling process, and the volatilization loss is about 20-40 g/barrel, so that a large amount of loss is caused and waste is caused. At present, the existing filling equipment does not have the capacity of tail gas recovery, and therefore, a tetrahydrofuran tail gas recovery device is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tetrahydrofuran tail gas recovery device to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the tetrahydrofuran tail gas recovering device comprises a recovering tower, wherein the recovering tower is provided with a middle section and an upper semicircular section and a lower semicircular section which are respectively combined on the upper part and the lower part of the middle section, the top of the inner side of the upper semicircular section is provided with an induced air fan, the lower side of the induced air fan is provided with a soft water spraying mechanism on one side of the middle section, the soft water spraying mechanism comprises a water storage tank, a water pump body, a spraying frame and a plurality of nozzles, the water storage tank is arranged on the outer side of the recovering tower, the water pump body is arranged on the top of the water storage tank, the input end of the water pump body is provided with a water leading pipe, the output end of the water pump body is provided with a water outlet inlet pipe, the spraying frame is arranged on the other side end of the water outlet pipe, a plurality of the nozzles are arranged on the lower end face of the spraying frame and face downwards, the other side of the middle section is provided with an induced air cover component, and the induced air cover component is arranged on the upper side of the lower semicircular section, a liquid discharge pipe is arranged at the center of the bottom in the lower semicircular section, a three-way port is arranged at the lower end of the liquid discharge pipe, a recovery pipe is arranged at the port of one side of the rest of the three-way port, and a treatment pipe is arranged at the rest of the three-way port.

Preferably, the induced air cover assembly comprises an installation cover, the front part and the rear part of the installation cover are provided with induced air arc covers in a combined mode, and the lower end face of the installation cover is provided with a plurality of induced air inlets.

Preferably, the recovery pipe and the treatment pipe are respectively provided with a first electromagnetic valve and a second electromagnetic valve.

Preferably, the inner side wall of the lower semicircular section is provided with a moisture detector, the moisture detector is electrically connected with a controller, and the controller is electrically connected with an induced draft fan, a water pump body, a first electromagnetic valve and a second electromagnetic valve.

Preferably, a tetrahydrofuran finished product barrel is arranged at the port on the other side of the recovery pipe in a combined mode.

Preferably, a tetrahydrofuran rectifying tower is arranged at the port on the other side of the treatment pipe in a combined mode.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the recovery tower provided by the utility model, in the filling process, part of volatile and lost tetrahydrofuran tail gas is sucked into the recovery tower through the air inducing arc cover and the mounting cover in the air inducing cover assembly under the action of the air inducing fan mounted at the top in the upper semicircular section in the recovery tower, and meanwhile, a water pump body power supply in the soft water spraying mechanism is switched on, quantitative soft water is pumped into the recovery tower from the water storage tank through the water guiding pipe, and convection operation is carried out on the tetrahydrofuran which is upwards volatilized from the recovery tower under the action of a plurality of nozzles below the spraying frame, so that the tetrahydrofuran is dissolved in water and converged into the lower semicircular section, the tail gas recovery efficiency is improved, and the practicability is high;

2. the water content of the water content detector in the lower semicircular section is lower than 5%, the water content detector can open the first electromagnetic valve on the recovery pipe through the controller and convey the water content detector to the tetrahydrofuran finished product barrel for secondary filling, the water content of the water content detector is higher than 5%, the controller can open the second electromagnetic valve on the treatment pipe and convey the water content detector to the tetrahydrofuran rectifying tower to finish water distillation, so that the water content of the water content detector is lower than 5%, and the classification and recovery treatment of the tetrahydrofuran tail gas with different water contents is finished.

Drawings

FIG. 1 is a schematic sectional front view of the present invention;

fig. 2 is a block diagram of the module connection according to the present invention.

In the figure: 1. a middle section; 2. an upper semicircular section; 3. a lower semicircular section; 4. an induced draft fan; 5. a water storage tank; 6. a water pump body; 7. a spray rack; 8. a spray head; 9. a water conduit; 10. a water outlet pipe; 11. an induced draft cover assembly; 111. mounting a cover; 112. an induced draft arc cover; 113. an induced air inlet; 12. a liquid discharge pipe; 13. a three-way port; 14. a recovery pipe; 15. a treatment tube; 16. a first solenoid valve; 17. a second solenoid valve; 18. a moisture detector; 19. a controller; 20. a tetrahydrofuran finished product barrel; 21. tetrahydrofuran rectifying tower.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a tetrahydrofuran tail gas recovery device comprises a recovery tower, wherein the recovery tower is provided with a middle section 1, an upper semicircular section 2 and a lower semicircular section 3 which are respectively combined at the upper part and the lower part of the middle section 1, the top of the inner side of the upper semicircular section 2 is provided with an induced draft fan 4, the lower side of the induced draft fan 4 and one side of the middle section 1 are provided with a soft water spraying mechanism, the soft water spraying mechanism comprises a water storage tank 5, a water pump body 6, a spraying frame 7 and a plurality of spray nozzles 8, the water storage tank 5 is arranged at the outer side of the recovery tower, the water pump body 6 is arranged at the top of the water storage tank 5, the input end of the water pump body 6 is provided with a water diversion pipe 9, the output end of the water pump body 6 is provided with a water outlet and inlet pipe 10, the spraying frame 7 is arranged at the other side end of the water outlet and inlet pipe 10, the plurality of spray nozzles 8 are arranged at the lower end surface of the spraying frame 7, the spray nozzles 8 face downwards, the other side of the middle section 1 is provided with an induced draft cover assembly 11, and the induced draft cover assembly 11 is arranged at the upper side of the lower semicircular section 3, a liquid discharge pipe 12 is arranged at the center of the bottom in the lower semicircular section 3, a three-way port 13 is arranged at the lower end of the liquid discharge pipe 12, a recovery pipe 14 is arranged at the rest port on one side of the three-way port 13, and a treatment pipe 15 is arranged at the rest port on the three-way port 13.

The induced draft cover assembly 11 comprises a mounting cover 111, the front part and the rear part of the mounting cover 111 are provided with induced draft arc covers 112 in a combined mode, and the lower end face of the mounting cover 111 is provided with a plurality of induced draft inlets 113; a first electromagnetic valve 16 and a second electromagnetic valve 17 are respectively arranged on the recovery pipe 14 and the treatment pipe 15; a moisture detector 18 is arranged on the inner side wall of the lower semicircular section 3, a controller 19 is electrically connected to the moisture detector 18, and the controller 19 is electrically connected with the induced draft fan 4, the water pump body 6, the first electromagnetic valve 16 and the second electromagnetic valve 17; a tetrahydrofuran finished product barrel 20 is assembled at the other end port of the recovery pipe 14; the other end of the processing pipe 15 is provided with a tetrahydrofuran rectifying tower 21.

The working principle is as follows: the utility model discloses when using, irritate tetrahydrofuran to tetrahydrofuran finished product bucket 20 in through filling equipment, at the in-process of filling, the tetrahydrofuran tail gas of partial volatilization loss can be in the recovery tower under the induced air fan 4 effect of top installation in first semicircle section 2, with volatile tetrahydrofuran tail gas in the induced air arc cover 112 and the installation cover 111 suction entering recovery tower in the induced air cover subassembly 11, put through the water pump body 6 power in the soft water spraying mechanism simultaneously, go into quantitative soft water through leading pipe 9 pump in to the recovery tower in following storage water tank 5, and carry out the convection current operation with getting into the tetrahydrofuran of volatilizing in the recovery tower under a plurality of shower nozzles 8 effects under spray frame 7, make tetrahydrofuran water dissolve in collect to second semicircle section 3 in, under the effect of moisture detector 18, detect the water content of tetrahydrofuran, the water content is less than 5%, can open first solenoid valve 16 on the recovery pipe 14 through controller 19 and carry it to tetrahydrofuran finished product bucket 20 and advance to tetrahydrofuran finished product bucket 20 The secondary filling is carried out, and the moisture content is higher than 5%, can open the second solenoid valve 17 on handling the pipe 15 through controller 19 and carry it to tetrahydrofuran rectifying column 21 and accomplish the moisture distillation for the moisture content is lower than 5%, thereby has accomplished volatilizing tetrahydrofuran tail gas and has easy operation, convenient to use, excellent in use effect's advantage.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a recovery unit of tetrahydrofuran tail gas, includes the recovery tower, its characterized in that: the recovery tower is provided with a middle section (1) and an upper semicircular section (2) and a lower semicircular section (3) which are respectively combined at the upper part and the lower part of the middle section (1), the top of the inner side of the upper semicircular section (2) is provided with an induced air fan (4), the lower side of the induced air fan (4) is provided with a soft water spraying mechanism at one side of the middle section (1), the soft water spraying mechanism comprises a water storage tank (5), a water pump body (6), a spraying frame (7) and a plurality of spray heads (8), the water storage tank (5) is arranged at the outer side of the recovery tower, the water pump body (6) is arranged at the top of the water storage tank (5), the input end of the water pump body (6) is provided with a water diversion pipe (9), the output end of the water pump body (6) is provided with a water outlet inlet pipe (10), the spraying frame (7) is arranged at the other side end of the water outlet inlet pipe (10), and the spray heads (8) are arranged at the lower end surface of the spraying frame (7) and face of the spray heads (8) is downward, the utility model discloses a sewage treatment device, including middle section (1) go up the opposite side and be provided with induced air cover subassembly (11), just induced air cover subassembly (11) set up in semicircle section (3) upside down, bottom center is provided with fluid-discharge tube (12) in semicircle section (3) down, fluid-discharge tube (12) lower extreme is provided with tee bend port (13), remaining one of them side port is provided with recovery tube (14) on tee bend port (13), remaining port is provided with handles pipe (15) on tee bend port (13).

2. The recovery device of tetrahydrofuran tail gas as claimed in claim 1, wherein: the induced draft cover assembly (11) comprises an installation cover (111), induced draft arc covers (112) are combined at the front and rear parts of the installation cover (111), and a plurality of induced draft inlets (113) are formed in the lower end face of the installation cover (111).

3. The recovery device of tetrahydrofuran tail gas as claimed in claim 1, wherein: the recovery pipe (14) and the treatment pipe (15) are respectively provided with a first electromagnetic valve (16) and a second electromagnetic valve (17).

4. The apparatus according to claim 3, wherein the apparatus comprises: the water content detection device is characterized in that a water content detector (18) is arranged on the inner side wall of the lower semicircular section (3), a controller (19) is electrically connected to the water content detector (18), and the controller (19) is electrically connected with an induced draft fan (4), a water pump body (6), a first electromagnetic valve (16) and a second electromagnetic valve (17).

5. The recovery device of tetrahydrofuran off-gas according to claim 1, wherein: and a tetrahydrofuran finished product barrel (20) is combined and arranged at the port on the other side of the recovery pipe (14).

6. The recovery device of tetrahydrofuran tail gas as claimed in claim 1, wherein: and a tetrahydrofuran rectifying tower (21) is combined and arranged at the port of the other side of the treatment pipe (15).