阅读说明：本技术 一种旋转轴漏斗式回流精馏头 (Rotating shaft funnel type reflux rectification head ) 是由 陆铭 徐毅越 于 2020-08-07 设计创作，主要内容包括：本发明涉及一种旋转轴漏斗式回流精馏头,包括气相保温管道、塔顶冷凝器和冷凝液分配器,气相保温管道的上方设置有气相出口导管；塔顶冷凝器的顶部与气相出口导管相连,底部设置有液相出口弯管,塔顶冷凝器内设置有冷凝蛇管；冷凝液分配器内设置有能够在水平面上转动的旋转轴漏斗,且液相出口弯管的下端伸入冷凝液分配器内并位于旋转轴漏斗的上方,旋转轴漏斗的一侧下方设置有与其出液口对应的回流液接收漏斗,回流液接收漏斗与伸入气相保温管道内的回流液封管相连,回流液接收漏斗的下方设置有固定集液漏斗,旋转轴漏斗的出液口通过转动能够与回流液接收漏斗或固定集液漏斗相对应。本发明能够降低了精馏头的使用成本,提高了安全性能。(The invention relates to a rotating shaft funnel type reflux rectification head which comprises a gas phase heat-insulating pipeline, a tower top condenser and a condensate distributor, wherein a gas phase outlet guide pipe is arranged above the gas phase heat-insulating pipeline; the top of the tower top condenser is connected with a gas phase outlet conduit, the bottom of the tower top condenser is provided with a liquid phase outlet elbow, and a condensing coil is arranged in the tower top condenser; be provided with in the condensate distributor and can be on the horizontal plane pivoted rotation axis funnel, and the lower extreme of liquid phase export return bend stretches into in the condensate distributor and lies in the top of rotation axis funnel, one side below of rotation axis funnel is provided with the backward flow liquid that corresponds rather than the liquid outlet and receives the funnel, the backward flow liquid is received the funnel and is linked to each other with the backward flow liquid seal pipe that stretches into in the gaseous phase heat preservation pipeline, the below that the funnel was received to the backward flow liquid is provided with fixed collection liquid funnel, the liquid outlet of rotation axis funnel can be received funnel or fixed collection liquid funnel corresponding with the backward flow liquid through rotating. The invention can reduce the use cost of the rectifying head and improve the safety performance.)

1. A rotating shaft funnel type reflux rectification head is characterized by comprising

A gas phase outlet conduit (12) is arranged above the gas phase heat preservation pipeline (11);

the top of the tower top condenser (21) is connected with the gas phase outlet conduit (12), the bottom of the tower top condenser (21) is provided with a liquid phase outlet elbow (22), and a condensation coil (23) is arranged in the tower top condenser (21);

condensate distributor (31), be provided with in condensate distributor (31) and be able to be on the horizontal plane pivoted rotation axis funnel (32), just the lower extreme of liquid phase export return bend (22) stretches into in condensate distributor (31) and lie in the top of rotation axis funnel (32), one side below of rotation axis funnel (32) is provided with backflow liquid receiving funnel (34) rather than liquid outlet (33) correspondence, backflow liquid receiving funnel (34) with stretch into downwards backflow liquid seal pipe (35) in gaseous phase heat preservation pipeline (11) link to each other, the below of backflow liquid receiving funnel (34) is provided with fixed collecting funnel (36), liquid outlet (33) of rotation axis funnel (32) can receive funnel (34) or fixed collecting funnel (36) corresponding with backflow liquid through rotating.

2. The rotating shaft funnel type reflux rectification head as claimed in claim 1, wherein a rotating shaft (38) is arranged at the center of the rotating shaft funnel (32), and the rotating shaft (38) can drive the rotating shaft funnel (32) to rotate.

3. The rotating shaft funnel type reflux rectification head as claimed in claim 2, wherein a cylindrical cavity (39) is arranged at the top of the rotating shaft (38), a pair of magnetic members (310) which are distributed in a central symmetry manner are arranged in the cylindrical cavity (39), a magnet (311) with two poles respectively corresponding to the two magnetic members (310) is arranged above the outside of the condensate distributor (31), and the magnet (311) is arranged in a rotating manner.

4. The rotating shaft funnel type reflux rectification head as claimed in claim 3, wherein a rotating shaft top cavity (312) is arranged at the top of the condensate distributor (31), the cylindrical cavity (39) is arranged in the rotating shaft top cavity (312), and a gap is reserved between the cylindrical cavity (39) and the inner wall of the rotating shaft top cavity (312).

5. The rotating shaft funnel type reflux rectification head as claimed in claim 3, wherein the magnet (311) is mounted on a rotating cylinder (313).

6. The rotating shaft funnel type reflux rectifier head according to claim 3, wherein the lower end of said rotating shaft (38) is rotatably mounted on an axle seat beam (314) located inside said condensate distributor (31).

7. The rotating shaft funnel type reflux rectification head as claimed in claim 1, wherein a vacuum heat-preservation jacket (14) is arranged outside the gas-phase heat-preservation pipeline (11), and an expansion joint (15) is arranged on the outer wall of the vacuum heat-preservation jacket (14).

8. The rotating shaft funnel type reflux rectification head as claimed in claim 1, wherein a thermometer sleeve (16) extending into the gas phase heat preservation pipeline (11) is arranged at the top of the gas phase heat preservation pipeline (11).

9. The rotating shaft funnel type reflux rectification head as claimed in claim 1, wherein a double-walled heat exchange jacket (24) is arranged outside the tower top condenser (21), and the inner cavity of the double-walled heat exchange jacket (24) is connected with the condensation coil (23) in series.

10. The rotating shaft funnel type reflux rectification head as claimed in claim 1, wherein a vacuum pumping cavity (316) is arranged below the fixed liquid collecting funnel (36), and a vacuum thread pumping head (317) is arranged on the side wall of the vacuum pumping cavity (316).

Technical Field

The invention belongs to the field of rectification and purification, and particularly relates to a rotating shaft funnel type reflux rectification head.

Background

The separation technology plays an important role in chemical production and experimental research, wherein the rectification equipment is mainly used for separating compounds with similar boiling points in the separation technology, and the rectification head is used for adjusting the reflux ratio in the rectification process so as to achieve the purpose of extracting high-purity substances.

The traditional rectifying head adopts an electromagnetic coil to control the swing of a swinging funnel with a magnetic part, so that the reflux ratio is adjusted. However, such a rectification head has several problems:

(1) after the electromagnetic coil is used for a long time, the temperature rises due to heating, so that the magnetic force lines are directly reduced, if the original magnetic force is required to be recovered, the distance between the electromagnetic coil and the magnetic part needs to be shortened, and the electromagnetic coil needs to be reset after being used, otherwise, when the electromagnetic coil is used next time, the swinging amplitude of the funnel, namely the impact force of the glass tube wall is increased due to the fact that the temperature of the electromagnetic coil is low and the magnetic force is large, the glass tube is directly impacted, even the whole rectifying head is scrapped, and the operation process is complicated;

(2) after the electromagnetic coil is used for a long time, the insulating layer of the enameled wire of the coil is easy to break down when the temperature rises, and if the rectifying head is used continuously, a new electromagnetic coil needs to be replaced, and the magnetic moment is adjusted again;

(3) the backflow of the swinging funnel is realized by the swinging in the glass tube, and the damage of the connecting part of the swinging funnel for supporting the swinging is very easy to cause after long-term use, so that the condition that the swinging funnel directly falls off is caused, and the scrapping of a rectification head is further caused;

(4) the swing funnel is matched with the electromagnetic coil to realize the left-right swing of the swing funnel through a glass welded sealing magnetic part, and in the swing process, the situation that the magnetic part impacts the glass tube is easily caused due to improper adjustment of magnetic moment or other reasons, the glass tube is easily cracked and broken, the whole rectification head is directly scrapped, and the probability of the situation in the rectification operation process of daily experiments is high;

the four conditions can increase the use cost of the rectification head;

(5) the electromagnetic coil needs on-site power supply, and the temperature rise of the coil is higher in long-time use and work due to two reasons:

a. the magnetic force lines generated after the electromagnetic coil is electrified can enable the coil to generate a certain temperature, generally about 60 ℃, which is the temperature rise formed by the normal work of the coil;

b. the rectification head sways the electromagnetic funnel, is in the high temperature gaseous phase that comes from the rectifying column, and this kind of high temperature gaseous phase rises to the condenser heat transfer after, and the condensate drips into and sways the funnel by gathering the funnel, carries out the reflux ratio distribution by solenoid drive, the glass tube wall of rectifying column top gaseous phase entry lower extreme, it is also that there is the temperature rise to generate heat to receive the influence of high temperature air current, especially when carrying out the rectification of high boiling point commodity circulation, corresponding wall temperature also can rise.

The electromagnetic coil heats under the influence of magnetic lines of force, and the heat from hot air flow from the top of the rectifying tower is added, once the heat of the electromagnetic coil and the heat are superposed and exceed the tolerance temperature of the electromagnetic coil, the insulating layer of the enameled wire is punctured to burn the coil, open fire is generated, and the electromagnetic coil belongs to a non-explosion-proof rectifying head and has low use safety.

Disclosure of Invention

The invention aims to provide a rotating shaft funnel type reflux rectifying head, which aims to solve the problems of high use cost and low safety performance of the rectifying head.

The invention relates to a rotating shaft funnel type reflux rectification head, which is realized by the following steps:

a rotary shaft funnel type reflux rectification head comprises

A gas phase outlet conduit is arranged above the gas phase heat preservation pipeline;

the top of the tower top condenser is connected with the gas phase outlet conduit, the bottom of the tower top condenser is provided with a liquid phase outlet elbow, and a condensation coil is arranged in the tower top condenser;

the condensate distributor, be provided with in the condensate distributor and can be on the horizontal plane pivoted rotation axis funnel, just the lower extreme of liquid phase export return bend stretches into in the condensate distributor and be located the top of rotation axis funnel, one side below of rotation axis funnel is provided with the backwash liquid that corresponds rather than the liquid outlet and receives the funnel, the backwash liquid is received the funnel and is stretched into downwards reflux liquid seal pipe in the gaseous phase heat preservation pipeline links to each other, the below that the funnel was received to the backwash liquid is provided with fixed collection liquid funnel, the liquid outlet of rotation axis funnel can receive funnel or fixed collection liquid funnel corresponding with the backwash liquid through rotating.

Furthermore, the center of rotation axis funnel is provided with the rotation axis, the rotation axis can drive the rotation axis funnel rotates.

Furthermore, a cylindrical cavity is arranged at the top of the rotating shaft, a pair of magnetic parts which are distributed in a central symmetry manner are arranged in the cylindrical cavity, and magnets with two poles respectively corresponding to the two magnetic parts are arranged above the outer part of the condensate distributor and are arranged in a rotating manner.

Furthermore, a rotating shaft top cavity is arranged at the top of the condensate distributor, the cylindrical cavity is arranged in the rotating shaft top cavity, and a gap is reserved between the cylindrical cavity and the inner wall of the rotating shaft top cavity.

Further, the magnet is mounted on the rotary cylinder.

Furthermore, the lower end of the rotating shaft is rotatably arranged on a shaft seat cross beam positioned in the condensate distributor.

Furthermore, a vacuum heat-insulating jacket is arranged outside the gas-phase heat-insulating pipeline, and an expansion joint is arranged on the outer wall of the vacuum heat-insulating jacket.

Furthermore, a thermometer sleeve extending into the gas-phase heat-insulating pipeline is arranged at the top of the gas-phase heat-insulating pipeline.

Furthermore, a double-wall type heat exchange jacket is arranged outside the tower top condenser, and an inner cavity of the double-wall type heat exchange jacket is connected with the condensation coil in series.

Furthermore, a vacuum pumping cavity is arranged below the fixed liquid collection funnel, and a vacuum thread pumping head is arranged on the side wall of the vacuum pumping cavity.

After the technical scheme is adopted, the invention has the beneficial effects that:

the invention adopts the rotating shaft funnel to replace the traditional swinging funnel controlled by the electromagnetic coil to form the explosion-proof rectifying head, thereby not only avoiding the problems of magnetic force reduction, coil burning and short circuit trip of the electromagnetic coil after long-time use, but also preventing the swinging funnel from falling off or damaging the glass tube in which the swinging funnel is positioned, not only reducing the failure rate of the rectifying head, but also prolonging the service life of the rectifying head, thereby directly reducing the use cost of the rectifying head and improving the safety performance of the rectifying head.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a block diagram of a rotating shaft funnel type reflux rectifier head of a preferred embodiment of the present invention;

FIG. 2 is a block diagram of the condensate distributor portion of a rotating shaft funnel type reflux rectifier head in accordance with a preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view of the rotating shaft funnel type reflux rectification head of the preferred embodiment of the present invention, illustrating the fit of the rotating shaft with the shaft seat cross beam;

FIG. 4 is a perspective view of the magnetic member of the rotating shaft funnel type reflux rectification head in a reflux state according to the preferred embodiment of the present invention;

FIG. 5 is a perspective view of a rotating shaft funnel type reflux rectifier head of a preferred embodiment of the present invention at the position of the rotating shaft funnel in a reflux state;

FIG. 6 is a perspective view of the magnetic member of the rotating shaft funnel type reflux rectifier head in the discharging state in accordance with the preferred embodiment of the present invention;

FIG. 7 is a perspective view of a rotating shaft funnel type reflux rectifier head of a preferred embodiment of the present invention in the discharge state;

in the figure: the device comprises a gas-phase heat-preservation pipeline 11, a gas-phase outlet conduit 12, a gas-phase inlet 13, a vacuum heat-preservation jacket 14, an expansion joint 15, a thermometer sleeve 16, a tower top condenser 21, a liquid-phase outlet elbow 22, a condensation coil 23, a double-walled heat-exchange jacket 24, a cooling water inlet 25, a cooling water outlet 26, a condensate distributor 31, a rotating shaft funnel 32, a liquid outlet 33, a reflux liquid receiving funnel 34, a reflux liquid sealing pipe 35, a fixed liquid collecting funnel 36, a discharge port 37, a rotating shaft 38, a cylindrical cavity 39, a magnetic part 310, a magnet 311, a rotating shaft top containing cavity 312, a rotating cylinder 313, a shaft seat cross beam 314, a conical shaft head 315, a vacuum pumping cavity 316, a vacuum threaded pumping head 317, an upright glass sleeve 318 and.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 to 7, a rotating shaft funnel 32 type reflux rectification head, comprises a gas phase heat preservation pipeline 11, a tower top condenser 21 and a condensate distributor 31, wherein a gas phase outlet conduit 12 is arranged above the gas phase heat preservation pipeline 11; the top of the tower top condenser 21 is connected with the gas phase outlet conduit 12, the bottom of the tower top condenser is provided with a liquid phase outlet elbow 22, and a condensation coil 23 is arranged in the tower top condenser 21; be provided with in the condensate distributor 31 and can be on the horizontal plane pivoted rotation axis funnel 32, just the lower extreme of liquid phase export return bend 22 stretches into in the condensate distributor 31 and be located rotation axis funnel 32's top, one side below of rotation axis funnel 32 is provided with the backward flow liquid that corresponds rather than liquid outlet 33 and receives funnel 34, backward flow liquid is received funnel 34 and is stretched into downwards backward flow liquid seal pipe 35 in the gaseous phase insulating tube 11 links to each other, the below that backward flow liquid received funnel 34 is provided with fixed collection liquid funnel 36, rotation axis funnel 32's liquid outlet 33 can receive funnel 34 or fixed collection liquid funnel 36 corresponding with the backward flow liquid through rotating.

When the liquid outlet 33 of the rotating shaft funnel 32 is opposite to the reflux liquid receiving funnel 34, the rotating shaft funnel is in a reflux state, and when the liquid outlet 33 of the rotating shaft funnel 32 is staggered from the reflux liquid receiving funnel 34 and is opposite to the fixed liquid collecting funnel 36, the rotating shaft funnel is in a discharge state. The rotary shaft funnel 32 rotates back and forth by 90 degrees or 180 degrees according to the set time proportion at the back flow position and the discharging position so as to realize the control of the back flow ratio.

Specifically, steam from the top of the rectification tower enters the gas-phase heat-insulating pipeline 11 from the gas-phase inlet 13 at the bottom of the gas-phase heat-insulating pipeline 11, during a reflux state, a liquid-phase medium flowing into the gas-phase heat-insulating pipeline 11 from the reflux liquid-sealing pipe 35 also returns to the rectification tower from the gas-phase inlet 13, and during a discharge state, feed liquid in the rotary shaft funnel 32 is discharged from the discharge port 37 at the bottom through the fixed liquid-collecting funnel 36, so that distribution and collection of all feed liquid are completed.

The gas phase material from the top of the rectification tower enters a gas phase outlet conduit 12 through a gas phase heat preservation pipeline 11, heat exchange is carried out from the top of a tower top condenser 21, condensate is poured into a rotating shaft funnel 32 through a liquid phase outlet elbow 22, a reflux liquid seal pipe 35 extends into the lower part of the gas phase heat preservation pipeline 11, the gas phase rising in the whole rectification process and the condensed liquid phase are in non-contact exchange, and therefore the gas phase and the condensed liquid phase are in an external reflux mode, and the purity of the rectification material can be correspondingly ensured.

The switching of the backflow state and the discharging state depends on the rotation of the rotating shaft funnel 32, and in order to realize the rotation of the rotating shaft funnel 32, a rotating shaft 38 is arranged at the center of the rotating shaft funnel 32, and the rotating shaft 38 can drive the rotating shaft funnel 32 to rotate.

Specifically, the rotating shaft funnel 32 and the rotating shaft 38 are integrated, the rotating shaft 38 is located at the center of the rotating shaft funnel 32, and the rotating shaft funnel 32 is driven to rotate by the rotation of the rotating shaft 38, so that the switching between the backflow state and the discharging state is achieved.

In order to enable the rotating shaft 38 to rotate so as to drive the rotating shaft funnel 32 to rotate synchronously, a cylindrical cavity 39 is arranged at the top of the rotating shaft 38, a pair of magnetic members 310 which are distributed in a central symmetry manner is arranged in the cylindrical cavity 39, a magnet 311 with two poles respectively corresponding to the two magnetic members 310 is arranged above the outer portion of the condensate distributor 31, and the magnet 311 is arranged in a rotating manner.

Specifically, the N, S two poles of the magnet 311 correspond to the two magnetic members 310 respectively, and attract the two magnetic members 310, when the magnet rotates, the magnetic members 310 rotate along with the magnet 311, so as to drive the rotating shaft 38 and the rotating shaft funnel 32 to rotate, and realize the switching between the backflow state and the discharge state.

Preferably, the symmetrically distributed magnetic members 310 can be selected from, but not limited to, pure iron or soft iron, and in this embodiment, soft iron is selected. The magnet 311 may be permanent rare earth magnetic steel used in this embodiment, but not limited to, which has stronger magnetic force lines than ordinary magnetic steel.

Preferably, the diameter of the top of the reflux receiving funnel 34 is smaller than the radius of the rotating shaft funnel 32, the rotating angle of the rotating shaft funnel 32 is 90 degrees or 180 degrees, the rotating angle is selected to be 90 degrees in the embodiment, so that the rotating angle of the rotating shaft funnel 32 is reduced on the basis that the reflux and the discharge states can be switched randomly, a half stroke is shortened compared with 180 degrees, and the efficiency of reflux and discharge switching is improved.

In order to ensure that the rotating shaft funnel 32 can flexibly rotate according to the set reflux ratio in the whole condensate distributor 31, a rotating shaft top cavity 312 is arranged at the top of the condensate distributor 31, the cylindrical cavity 39 is arranged in the rotating shaft top cavity 312, and a gap is reserved between the cylindrical cavity 39 and the inner wall of the rotating shaft top cavity 312.

Specifically, two upright glass tube sleeves 318 which are centrosymmetric are arranged in the cylindrical cavity 39, the magnetic member 310 is installed in the upright glass tube sleeves 318, a bottleneck position which only allows the rotating shaft 38 to pass through is arranged below the rotating shaft top cavity 312, a gap of about 1mm is reserved between the cylindrical cavity 39 and the rotating shaft top cavity 312, a gap of about 1mm is also reserved between the rotating shaft 38 and the bottleneck, and the cylindrical cavity 39 and the rotating shaft 38 can be positioned and rotated without resistance.

In this embodiment, the cylindrical cavity 39 and the magnetic member 310 are both cylindrical and have a cylindrical sleeve structure, and are fabricated with a specific gap distance, and the two vertical glass sleeves 318 and the magnetic member 310 are made to be symmetrical with each other.

To effect rotation of the magnet 311, the magnet 311 is mounted on a rotary cylinder 313.

Specifically, the disk of the rotary cylinder 313 is disposed downward, and the magnet 311 is mounted on the disk of the rotary cylinder 313 to correspond to the two magnetic members 310 disposed therebelow.

Preferably, the rotary cylinder 313 may be a rotary cylinder of HRQ2 type, but not limited thereto.

Preferably, the rotary cylinder 313 should be connected to a pneumatic solenoid valve driven by a reflux ratio controller, so as to control the dwell time before rotation, i.e. the dwell time in the reflux state, and the dwell time after rotation, i.e. the dwell time in the discharge state, of the rotary cylinder 313, thereby realizing the adjustment of the reflux ratio.

To enable support of the rotating shaft 38, the lower end of the rotating shaft 38 is rotatably mounted on a shaft seat cross member 314 located within the condensate distributor 31.

Preferably, a conical shaft head 315 is provided at the lower end of the rotating shaft 38, and a concave recess 319 engaged with the conical shaft head 315 is provided on the shaft seat cross member 314 connected to the inner wall of the condensate distributor 31, and the conical shaft head 315 is engaged with the concave recess 319, thereby serving as a supporting point and a rotation positioning center of the rotating shaft 38.

Specifically, the shaft seat cross beam 314 is horizontally arranged and welded on the inner wall of the condensate distributor 31, the lower end of the rotating shaft 38 is a conical shaft head 315, and the taper of the concave pit 319 is greater than that of the shaft head, so that the friction force between the rotating shaft 38 and the concave pit 319 of the shaft seat cross beam 314 is small, and the shaft seat cross beam 314 can support the rotating shaft 38 and ensure the smoothness of the rotation of the rotating shaft 38.

In order to keep warm for the steam entering the gas phase heat preservation pipeline 11, a vacuum heat preservation jacket 14 is arranged outside the gas phase heat preservation pipeline 11.

In order to prevent the vacuum insulation jacket 14 from being pulled apart in the thermal expansion process, an expansion joint 15 is arranged on the outer wall of the vacuum insulation jacket 14.

When the gas-phase heat-insulating pipe 11 is expanded by the heat of the gas phase, the vacuum heat-insulating jacket 14 can be expanded to a certain extent by the expansion joint 15.

In order to detect the temperature of the steam at the top of the rectifying tower in real time and guide the operation of the rectifying process, the top of the gas-phase heat-insulating pipeline 11 is provided with a thermometer sleeve 16 extending into the gas-phase heat-insulating pipeline 11.

The thermometer is arranged in the thermometer sleeve 16, the temperature measuring end of the thermometer extends into the gas-phase heat-preservation pipeline 11, the gas-phase temperature is detected, and the arrangement of the thermometer sleeve 16 can ensure the sealing performance of the top of the gas-phase heat-preservation pipeline 11.

The overhead condenser 21 is used for condensing the vapor from the top of the rectification column into liquid so as to perform reflux ratio distribution, and in order to improve the condensation effect, a double-walled heat exchange jacket 24 is arranged outside the overhead condenser 21, and the inner cavity of the double-walled heat exchange jacket 24 is connected with the condensation coil 23 in series.

The double cooling mode of the condensation coil 23 and the double-wall type heat exchange jacket 24 is adopted to increase the heat exchange area and improve the condensation effect.

Preferably, the condensation coil 23 is a double-layer parallel condensation coil, so that the condensation effect can be further improved.

Specifically, the bottom of the double-layer parallel type condensation coil is provided with a cooling water inlet 25 extending out of the double-walled heat exchange jacket 24, a cooling water outlet 26 is arranged above the double-walled heat exchange jacket 24, and the other end of the double-layer parallel type condensation coil is communicated with the inner cavity of the double-walled heat exchange jacket 24. The cooling water enters the double-layer parallel type condensation coil from the cooling water inlet 25, then enters the double-wall type heat exchange jacket 24, and finally is discharged from the cooling water outlet 26.

In order to balance the pressure of each part of the whole rectifying head, a vacuum pumping cavity 316 is arranged below the fixed liquid collecting funnel 36, and a vacuum threaded pumping head 317 is arranged on the side wall of the vacuum pumping cavity 316.

Specifically, the vacuum screw-thread air suction head 317 is close to the fixed liquid collecting funnel 36, so that liquid dropping from the fixed liquid collecting funnel 36 is prevented from being taken away.

During rectification, a gas phase inlet 13 of a gas phase heat preservation pipeline 11 is connected with a rectification tower, steam enters the gas phase heat preservation pipeline 11 and enters a tower top condenser 21 through a gas phase outlet guide pipe 12, heat exchange is carried out through a double-layer parallel type condensation coil pipe and a double-wall type heat exchange jacket 24, material steam is rapidly liquefied and then flows into a rotating shaft funnel 32 through a liquid phase outlet bent pipe 22, liquid phase feed liquid can flow into a reflux liquid receiving funnel 34 or a fixed liquid collecting funnel 36 through rotation of the rotating shaft funnel 32, and when the liquid phase feed liquid flows into the reflux liquid receiving funnel 34, the liquid phase feed liquid is sent into the gas phase heat preservation pipeline 11 again through a reflux liquid sealing pipe 35 and flows back into the rectification tower, namely, the reflux state is obtained; when the condensate flows into the fixed collecting funnel 36, the condensate is discharged and collected through a discharge hole 37 at the bottom of the condensate distributor 31, namely, the condensate is discharged.

In this embodiment, when the rectifying head is in the initial state, that is, when the rotating shaft funnel 32 is in the backflow state, referring to fig. 4-5, the two magnetic members 310 are located in parallel on the plane where the whole rectifying head is located, at this time, the liquid outlet 33 of the rotating shaft funnel 32 is opposite to the backflow liquid receiving funnel 34, and the feed liquid can flow back through the backflow liquid receiving funnel 34 and the backflow liquid sealing pipe 35;

referring to fig. 6-7, when the discharge state needs to be switched, the rotary cylinder 313 drives the magnet 311 to rotate 90 °, so that the liquid outlet 33 of the rotary shaft funnel 32 is staggered from the reflux liquid receiving funnel 34 and is opposite to the fixed liquid collecting funnel 36, and the feed liquid directly enters the fixed liquid collecting funnel 36 and is discharged from the discharge port 37 at the bottom of the condensate distributor 31.

The initial position of the magnetic member 310 is also feasible except the above-mentioned situation, and the rotation angle can be adjusted as required, and it is only necessary to ensure that the liquid outlet 33 of the rotating shaft funnel 32 is opposite to the reflux liquid receiving funnel 34 in the initial state, and is staggered with the reflux liquid receiving funnel 34 after rotating.

According to the invention, the rotation of the rotating shaft funnel 32 is driven by the matching of the magnet 311 and the magnetic part 310, and the swinging of the swinging funnel driven by the traditional electromagnetic coil is replaced, so that the pneumatically controlled explosion-proof rectifying head is formed, the random switching between the reflux state and the discharging state can be realized, the operation is simple and convenient, the condition that the rectifying head is scrapped due to the problems caused by the long-term use of the electromagnetic coil and the swinging funnel and various potential safety hazards are avoided, the use cost of the rectifying head is reduced, the safety performance of the rectifying head is improved, and the service life of the rectifying head is prolonged.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.