CN213951038U

CN213951038U - Toluene recovery device

Info

Publication number: CN213951038U
Application number: CN202022580610.7U
Authority: CN
Inventors: 赵长春; 徐林江; 杨咏; 孙永涛; 虎刚; 徐卫锋
Original assignee: Ningxia Baistekeyuan Chemical Co ltd
Current assignee: Ningxia Baistekeyuan Chemical Co ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-08-13
Anticipated expiration: 2030-11-10

Abstract

The utility model discloses a toluene recovery device, which comprises a distillation still, a cavity is formed between an outer liner and an inner liner, and a plurality of heating resistance blocks are arranged in the cavity; the distillation kettle is internally provided with a stirring device, the distillation kettle is provided with a feeding pipe, a first activated carbon filter layer and a second activated carbon filter layer are arranged on the feeding pipe, the distillation kettle is connected with a first condensing device, the first condensing device is connected with a second condensing device, the second condensing device is connected with a separation tank, a molecular sieve partition layer is arranged in the collection tank, the collection tank is provided with a guide outlet, the guide outlet is positioned above the molecular sieve partition layer, and the guide outlet is connected with a benzene collection tank; the utility model discloses avoid impurity influence purification effect, avoid producing the dirt to the stills inner wall, avoid influencing stills's heat exchange rate, add effectually, also avoided thermal giving off, avoid the waste of heat energy, can be further carry out the drying to toluene and get rid of the moisture of carrying.

Description

Toluene recovery device

Technical Field

The utility model relates to a recovery unit, in particular to toluene recovery unit.

Background

Toluene is a common solvent and needs to be recovered by distillation purification after use.

1. The solvent stock solution usually contains more impurities, and the impurities can influence the purification effect after the solvent directly enters the distillation still and easily generate dirt on the inner wall of the distillation still to influence the heat exchange rate of the distillation still;

2. the traditional distillation kettle usually adopts a jacket type or a heating pipe is arranged in the distillation kettle, when the jacket type is adopted, the contact surface of a heat source and stock solution in the distillation kettle is less, and heat is easy to radiate outwards;

3. the purified toluene was not further dried to remove water.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned problem, provided a toluene recovery unit. The utility model adopts the technical proposal that: a toluene recovery device comprises a distillation still, wherein the distillation still is of a double-layer structure and comprises an outer liner and an inner liner, a cavity is formed between the outer liner and the inner liner, and a plurality of heating resistor blocks are arranged in the cavity; a stirring device is installed in the distillation kettle, the distillation kettle is provided with a feeding pipe, a first activated carbon filtering layer and a second activated carbon filtering layer are installed on the feeding pipe, and the aperture of a filtering hole of the first activated carbon filtering layer is larger than that of a filtering hole of the second activated carbon filtering layer;

the distillation kettle is connected with a first condensing device, a first condensed water inlet and a first condensed water outlet are formed in the first condensing device, the first condensing device is connected with a second condensing device, a second condensed water inlet and a second condensed water outlet are formed in the second condensing device, a first pressure pump is installed at the joint of the first condensing device and the second condensing device, and the diameter of a condensing pipe in the first condensing device is larger than that of a condensing pipe in the second condensing device; the second condensing equipment is connected with the knockout drum, the second condensing equipment with the second force pump is installed to the knockout drum junction, be provided with molecular sieve partition layer in the knockout drum, the knockout drum is provided with the export, the export is located molecular sieve partition layer top, the export connection of leading has the benzene holding vessel.

Further, the outer container is made of heat-insulating materials.

Further, the lining is made of heat conducting materials.

Further, the stirring device comprises a stirring shaft and stirring blades.

Further, the first condensed water inlet is located below the first condensed water outlet.

Further, the second condensate inlet is located below the second condensate outlet.

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

1. the utility model relates to a toluene recovery unit, the solvent that contains impurity gets into from the inlet pipe, adsorb through first active carbon filter layer and second active carbon filter layer, first active carbon filter layer filters the pore aperture and is greater than second active carbon filter layer and filters the pore aperture, first active carbon filter layer adsorbs and gets into the absorption of second active carbon filter layer and get rid of less impurity after getting rid of the great impurity of granularity, avoid impurity influence purification effect, avoid producing the dirt to the stills inner wall, avoid influencing stills's heat exchange rate.

2. The utility model relates to a toluene recovery unit, in the solvent got into stills, agitating unit in the stills carried out intensive mixing to the solvent, installed the heating resistor piece in the cavity that forms between outer courage and the inside lining, and the heating resistor piece heats the solvent and makes toluene separate out, and it is effectual to heat, has also avoided thermal giving off, avoids the waste of heat energy.

3. The utility model relates to a toluene recovery unit, the moisture that is mingled with in the molecular sieve partition layer that sets up in the knockout drum separates in to the liquefaction toluene, and the hydrone cuts off the layer through the molecular sieve and falls into the knockout drum bottom, and toluene is stayed on the molecular sieve partition layer, and later in toluene passes through the leading-in benzene collecting tank of export, accomplishes the recovery of toluene, and toluene that can be further carries out the drying and gets rid of the moisture that carries.

4. The utility model relates to a toluene recovery unit, the design is simple, low in manufacturing cost, and the cost has also been practiced thrift in energy-conserving convenient the time.

Drawings

In order to more clearly explain the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without making any inventive changes.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an enlarged view of a portion of the structure shown at B in FIG. 1;

fig. 4 is a partial enlarged view of the point C in fig. 1 according to the present invention.

In the figure, 1-a distillation kettle, 2-an outer container, 3-an inner liner, 4-a thermal resistance block, 5-a stirring device, 6-a feeding pipe, 7-a first activated carbon filter layer, 8-a second activated carbon filter layer, 9-a first condensing device, 10-a first condensed water inlet, 11-a first condensed water outlet, 12-a second condensing device, 13-a second condensed water inlet, 14-a second condensed water outlet, 15-a first pressure pump, 16-a separation tank, 17-a second pressure pump, 18-a molecular sieve partition layer, 19-a guide outlet and 20-a benzene collection tank.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings.

The core of the utility model is to provide a toluene recovery unit, the utility model discloses avoid impurity influence purification effect, avoid producing the dirt to the stills inner wall, avoid influencing stills's heat exchange rate, add effectually, also avoided thermal giving off, avoid the waste of heat energy, can be further carry out the drying to toluene and get rid of the moisture of carrying.

Fig. 1 is a schematic view of the overall structure of the present invention, fig. 2 is a partial enlarged view of a position a in fig. 1, fig. 3 is a partial enlarged view of a position B in fig. 1, and fig. 4 is a partial enlarged view of a position C in fig. 1. As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the utility model discloses a toluene recovery device, which comprises a distillation still 1, wherein the distillation still 1 is of a double-layer structure and comprises an outer liner 2 and an inner liner 3, a cavity is formed between the outer liner 2 and the inner liner 3, and a plurality of heating resistance blocks 4 are arranged in the cavity; a stirring device 5 is arranged in the distillation kettle 1, the distillation kettle 1 is provided with a feeding pipe 6, a first activated carbon filtering layer 7 and a second activated carbon filtering layer 8 are arranged on the feeding pipe 6, and the aperture of a filtering hole of the first activated carbon filtering layer 7 is larger than that of a filtering hole of the second activated carbon filtering layer 8;

the distillation kettle 1 is connected with a first condensing device 9, a first condensed water inlet 10 and a first condensed water outlet 11 are arranged on the first condensing device 9, the first condensing device 9 is connected with a second condensing device 12, a second condensed water inlet 13 and a second condensed water outlet 14 are arranged on the second condensing device 12, a first pressure pump 15 is arranged at the joint of the first condensing device 9 and the second condensing device 12, and the diameter of a condensing pipe in the first condensing device 9 is larger than that of a condensing pipe in the second condensing device 12; second condensing equipment 12 is connected with knockout drum 16, and second force pump 17 is installed with knockout drum 16 junction to second condensing equipment 12, is provided with molecular sieve partition layer 18 in the knockout drum, and the knockout drum is provided with export 19, and export 19 is located molecular sieve partition layer 18 top, and export 19 is connected with benzene holding tank 20.

Specifically, the outer container 2 is made of a heat insulating material.

In particular, the lining 3 is made of heat conducting material.

Specifically, the stirring device 5 includes a stirring shaft and stirring blades.

In particular, the first condensate inlet 10 is located below the first condensate outlet 11.

In particular, the second condensate inlet 13 is located below the second condensate outlet 14.

The utility model discloses the theory of operation: solvent containing impurities enters from a feeding pipe 6 and is adsorbed by a first activated carbon filter layer 7 and a second activated carbon filter layer 8, the aperture of a filter hole of the first activated carbon filter layer 7 is larger than that of a filter hole of the second activated carbon filter layer 8, the first activated carbon filter layer 7 adsorbs and removes the impurities with larger granularity and then enters a second activated carbon filter layer 8 to adsorb and remove the smaller impurities, then the solvent enters a distillation kettle 1, a stirring device 5 in the distillation kettle 1 fully stirs the solvent, a heating resistance block 4 is arranged in a cavity formed between an outer liner 2 and an inner liner 3, the heating resistance block 4 heats the solvent to separate the toluene, then the toluene enters a first condensing device 9 to be condensed and enters a second condensing device 12 to be further condensed after passing through the first condensing device 9, the diameter of a condensing pipe in the first condensing device 9 is larger than that of the second condensing device 12, the condensation pipes arranged in the second condensation device 12 are more and more dense than the condensation pipes in the first condensation device 9, so the condensation effect of the second condensation device 12 is better, the toluene is liquefied after twice condensation, the liquefied toluene in the first condensation device 9 enters the second condensation device 12 under the action of the first pressure pump 15, and then the liquefied toluene in the first condensation device 9 and the second condensation device 12 enters the separation tank 16 under the action of the second pressure pump 17.

The moisture that is mingled with in the liquefied toluene is separated to the molecular sieve partition layer 18 that sets up in knockout drum 16, and the hydrone falls into knockout drum 16 bottom through molecular sieve partition layer 18, and the toluene is stayed on molecular sieve partition layer 18, and later the toluene is leading-in benzene holding vessel 20 through export 19, accomplishes the recovery of toluene.

The outer container 2 is made of heat insulating material to prevent heat generated by the heating resistor block 4 from being dissipated.

The lining 3 is made of heat conducting material, and heat generated by the heating resistor block 4 is transmitted to the solvent through the lining 3.

The stirring device 5 comprises a stirring shaft and stirring blades, and the stirring shaft rotates to drive the stirring blades to stir.

The first condensed water inlet 10 is positioned below the first condensed water outlet 11, and condensed water enters from the lower part and flows down to the upper part, so that the condensed water flows more slowly, and the cooling is more sufficient.

The second condensed water inlet 13 is positioned below the second condensed water outlet 14, and condensed water enters from the lower part and flows from bottom to top, so that the condensed water flows more slowly, and the cooling is more sufficient.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.

Claims

1. A toluene recovery device comprises a distillation still and is characterized in that the distillation still is of a double-layer structure and comprises an outer liner and an inner liner, a cavity is formed between the outer liner and the inner liner, and a plurality of heating resistance blocks are arranged in the cavity; a stirring device is installed in the distillation kettle, the distillation kettle is provided with a feeding pipe, a first activated carbon filtering layer and a second activated carbon filtering layer are installed on the feeding pipe, and the aperture of a filtering hole of the first activated carbon filtering layer is larger than that of a filtering hole of the second activated carbon filtering layer;

2. The toluene recovery apparatus according to claim 1, wherein the outer container is made of a heat insulating material.

3. The toluene recovery apparatus of claim 1, wherein the inner liner is made of a thermally conductive material.

4. The toluene recovery apparatus of claim 1, wherein the stirring device comprises a stirring shaft and stirring blades.

5. The toluene recovery apparatus according to claim 1, wherein the first condensed water inlet is located below the first condensed water outlet.

6. The toluene recovery apparatus according to claim 1, wherein the second condensed water inlet is located below the second condensed water outlet.