JPS5827761Y2 - Solvent container of evaporator for solvent recovery - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a solvent container for a solvent recovery evaporator.

Hydrocarbons for paint, printing, cleaning, oil extraction, etc.
A variety of solvents such as halogenated hydrocarbons and ketones are widely used.

Collecting these used waste solvents is beneficial for reducing product prices and saving resources.

In recent years, small-sized solvent recovery equipment has been developed, but since many of the solvents handled are flammable and explosive, it is difficult to heat the solvent container from the bottom of the inner wall of the evaporator that houses the solvent container, or to heat the solvent container from the heat transfer part. The method involved heating the solvent container by immersing it in oil and heating the oil using an oil bath.

Therefore, in the former case, the heating efficiency is low because the waste solvent is heated through a mere wall of the evaporator, and when heated to a high temperature, local heating occurs in the waste solvent and it burns.

In addition, in the latter case, since it is an oil heating type, the waste solvent does not burn, but it takes a long time to heat the oil, it takes a long time to recover the solvent, and it also has the disadvantage that oil vapor scatters when taking out the solvent container. All had low heat transfer efficiency.

The present invention was developed in view of the above points.The solvent container, which can be inserted into and removed from the evaporator, has a heat pipe structure, which enables rapid heating and high heat transfer efficiency, reducing solvent recovery time and heating. To provide a solvent container for an evaporator for solvent recovery, which saves resources, prevents the vapor of a working fluid contained in the solvent container from scattering when the solvent container is taken out, and has good workability.

The present invention will be explained below with reference to examples.

FIG. 1 shows an embodiment of the cylindrical heat pipe structure of the present invention.

The evaporator 1 has a box-like structure including an evaporator main body 2 having a downwardly recessed interior and an evaporator lid 3 having an upwardly recessed interior and attached to the evaporator main body 2 so as to be openable and closable.

The evaporator body 2 has an outer peripheral wall 4 made of fully welded sheet metal such as nickel-chromium steel plates and stainless steel plates, and a heat insulating wall 5 made of glass wool, rock wool, heat-resistant foamed resin, etc. is provided around the inside. .

A solvent container 6 is attached to the inside of the heat insulating wall 5 so as to be removably inserted into the evaporator 1.

As shown in the figure, the solvent container 6 has a sealed double structure of a bottomed cylindrical welded joint of a heat pipe inner wall 8 and a heat pipe outer wall 9, each having a vapor space 7 sealed with a narrow gap. It is designed to withstand

The material is aluminum, carbon steel, copper, stainless steel, etc., and is suitable for the hydraulic fluid 10, solvent, etc. to be sealed.

As shown in FIGS. 2 and 3, a wick 11 made of thin glass cloth, metal felt, stainless wire mesh, sintered copper, etc. is tightly adhered to the inner surface of the bottom of the heat pipe inner wall 8 and the heat pipe outer wall 9 over the entire surface. are doing.

In addition, in the vapor space 7 between the heat pipe inner wall 8 and the heat pipe outer wall 9 on the vertical side circumference, elongated bridging wicks 12 are placed at regular intervals from the upper end to the lower end as shown in FIG. It is set up.

Also in the steam space 7 between the heat pipe inner wall 8 and the heat pipe outer wall 9 on the horizontal bottom part, connecting wicks 13 are arranged at regular intervals from one end to the other as shown in FIG. There is.

The working fluid 10 is sealed in the vapor space 7 by evacuating it with water, acetone, dowsum, etc., and the amount thereof is equal to the wick 11.
An appropriate amount is used depending on the recovery temperature of the solvent to be recovered.

A collar portion 14 is provided on the upper layer of the solvent container 6 to protrude outward over the entire circumference, and the collar portion 14 is engaged with the upper peripheral surface of the evaporator main body 2 as shown in FIG. The main body 2 and the evaporator lid 3 can be sandwiched in an airtight manner through sealing materials 15 and 16 provided around the peripheries, respectively.

The evaporator lid 3 has almost the same structure as the evaporator main body 2, but the inner peripheral surface is made of the same material as the outer wall and has a welded joint structure, and is attached to the evaporator main body 2 so that it can be opened upward with a screw fitting 17. The solvent container 6 can be taken in and out of the evaporator main body 2, and can be opened and closed using a one-touch opening/closing tool 18.

At the center of the lower part of the evaporator body 2, a heating device 20 is installed, in which a heater (not shown) such as a cartridge heater is removably inserted into a flat heating plate 19. The upper surface faces or faces the lower surface of the solvent container 6 at a constant distance.

The heating device 20 prevents overheating using a built-in thermostat, etc., and controls the temperature appropriately using a control device (not shown) using a temperature sensor 21 placed at an appropriate position to detect the temperature of the outer peripheral surface of the solvent container 6. The heating can be controlled using a heating timer, heating time setting timer, etc.

22 is a handle, 23 is an evaporated solvent outflow pipe communicating with the inside of the evaporator 1, and a flexible connecting pipe 2 is connected to the condensing device 24 as shown in FIG.
5, the solvent can be removably connected to the collection container 2.
The items can be collected on June 6th.

A hook 27 is attached to the upper part of the solvent container 6, and is hooked onto a pull-down tool (not shown) so that the solvent container 6 can be taken in and out.

Then, the opening/closing tool 18 is removed, the evaporator lid 3 is opened, and the solvent container 6 containing the waste solvent is stored in the evaporator main body 2.

Close the evaporator lid 3, and turn on the heating time setting timer of the control device.
Set the temperature regulator etc. according to the above solvent and heat the heating device 20.
Activate.

The bottom surface of the heat pipe outer wall 9, which is the heating part of the cylindrical heat pipe structure of the solvent container 6, is heated, and the small volume of working fluid 10 sealed in the evaporation space 7 is immediately heated and evaporated, and the liquid is evaporated in the cooling part. It flows through the evaporation space 7 toward the upper surface side and the peripheral side of a certain bottom, releases the latent heat obtained in the heating section to the heat pipe inner wall 8, heats the solvent container 6, and transfers a large amount of heat from the heating section to the cooling section. Communicate.

The vapor is condensed in the cooling section, and the condensed working fluid 10 is transferred to the wick 11 by capillary action. The reflux flows from the cooling section to the heating section via the crosslinking wick 12, the connecting wick 13, and the like.

In this way, a large amount of heat transfer is uniformly and rapidly repeated over substantially the entire surface of the solvent container.

Therefore, the solvent container is uniformly heated from almost the entire surface such as the bottom and side surfaces, and the waste solvent inside is uniformly and quickly heated and evaporated.

The heating device 20 is heated for a predetermined time while controlling the temperature using the temperature sensor 21, and the evaporated solvent is transferred to the evaporated solvent outflow pipe 23.
As shown in FIG. 4, the condensing device 24 is
The solvent flows out, is condensed in a condensing device 24, and is recovered as a solvent in a recovery container 26.

In this way, the time to heat the hydraulic fluid is short, and
Since the solvent container can be heated evenly with the evaporating working fluid directly from the bottom and side surfaces, heating is quick and heat transfer efficiency is high, which shortens the time required to recover the solvent.

When the solvent recovery is completed, the opening/closing tool 18 is removed, the evaporator lid 3 is opened, and the pulling tool is hooked onto the hook 27 to take out the solvent container 6.

The pull-down tool makes it easy to take out even when it's a little hot.

At this time, since the hydraulic fluid is sealed, the vapor of the hydraulic fluid will not scatter to the outside and cause discomfort to the operator.

In addition, a collar is provided around the periphery, and the solvent container is airtightly sandwiched between the evaporator body and the evaporator lid, and the heating device and waste solvent are sealed in a sealed double structure between the inner wall of the heat pipe and the outer wall of the heat pipe. Since there is a partition wall between the evaporator and the evaporator, the inner circumferential wall of the evaporator body can be removed, and the structure is safe.

FIG. 5 shows another embodiment of the present invention, in which a plurality of rod-shaped heat pipes 29 are respectively attached to the outer surface of the side peripheral wall 28 of the solvent container 6 at regular intervals over almost the entire length in the vertical direction. The lower ends of the heat pipes 29 are integrally formed so as to communicate with the bottom of the flat heat pipe structure.

This embodiment has a simpler structure and can be manufactured at a lower cost than the previous embodiment.

FIG. 6 shows still another embodiment of the present invention, in which the solvent container 6
The bottom part has the above-mentioned flat plate heat pipe structure.

The flat plate heat pipe structure is almost the same as the horizontal part of the cylindrical heat pipe structure described above, and each end face of the heat pipe inner wall 30 and heat pipe outer wall 31 is closed with an end cap 32.

In this embodiment, the bottom surface can be heated uniformly over the entire surface, and has a simpler structure, is easier to manufacture, and is less expensive.

In addition to the above, various heat pipe structures for the solvent container may be used, such as arranging a rod-shaped heat pipe or a serpentine heat pipe on the bottom of the solvent container, or winding a rod-shaped heat pipe around the side peripheral wall. You can also do that.

In the above embodiment, the heat pipe structure has a structure in which a wick is also attached to the vertical drop portion, but the wick may be omitted and the hydraulic fluid may fall under its own weight.

Further, in order to prevent the vapor pressure of the low boiling point working fluid from becoming excessive, a bypass section provided with a safety valve or the like may be provided.

In addition, the heating device should be stably attached to the evaporator body using multiple fittings so that it is always pressed upward with an elastic material such as a coil spring, and the heat generated by the bottom surface of the solvent container and the top surface of the heating device should be It is also possible to always ensure contact with the transfer surface without creating a gap, thereby increasing heat transfer efficiency.

FIG. 7 shows still another embodiment of the present invention, in which the upper layer of the solvent container 6 having a heat pipe structure is sealed airtight by a heat-resistant elastic seal 33 provided around the inner circumference of the evaporator lid 3. I arranged to have an interview with him.

The same objective can also be achieved in this way.

In addition to the above, a container lid is airtightly attached to a solvent container having a heat pipe structure, and a solvent outflow pipe is provided protruding from the container lid, so that the evaporated solvent flows through the evaporated solvent outflow pipe of the evaporator lid. Various modifications can be made, such as connecting to a connecting pipe of a condensing device.

FIG. 8 shows another example of the use of the embodiment of the present invention, in which a solvent container 6 having a heat pipe structure such as a cylindrical shape or a flat plate shape is simply attached to the evaporator main body 2 having an inner circumferential wall 34 on the inner surface. It was designed to accommodate.

In this embodiment, even if the solvent container is easily accommodated, the bottom surface of the solvent container always comes into contact with the top surface of the heating device or the bottom surface of the evaporator main body, which is installed directly below the heating device, so that the solvent container can be easily accommodated. The heat pipe structure provides the same heat transfer effect as above.

Further, the evaporator lid 3 may be disposed in such an evaporator 1 so as to face the upper part of the solvent container 6 as shown in FIG.

In addition to the welded sheet metal structure as described above, the solvent container can also have a structure in which welding is applied to the press forming process as appropriate, and the size is approximately 181.201 mm or 200 mm. Depending on the amount of solvent recovered, an appropriate amount can be used, such as about 1 liter.

As described above, with the present invention, the solvent container can be inserted and removed from the evaporator, making it easy to load waste solvent and clean up evaporation residue, as well as allowing continuous use by replacing the solvent collection container. Since the solvent container is formed into a heat pipe structure, the loaded waste solvent can be heated more quickly and directly compared to oil-heated systems or simple wall heating, eliminating wasted heating, and achieving uniform and high heat transfer efficiency. Therefore, the solvent recovery time can be shortened.

Since the solvent recovery time can be shortened, heating sources can also be saved.

Furthermore, even though hydraulic fluid is used in the solvent container, because the hydraulic fluid is sealed, oil vapor scatters to the outside every time the solvent container is inserted into and removed from the evaporator, as in an oil-heated system. There is no such problem and the workability is good.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted schematic longitudinal sectional view of an embodiment of the present invention, Figs. 2 and 3 are a partially enlarged side sectional view and a plan sectional view of the same, respectively, and Fig. 4 is an example of the use of the same. FIG. 5 is a plan sectional view of another embodiment of the same as above, FIG. 6 is a partially omitted vertical sectional view of the same as above and still another embodiment, and FIG. 7 is another embodiment of the same as above. FIG. 8 is a partially omitted schematic vertical cross-sectional view of still another embodiment of the same as above. 1...Evaporator, 2...Evaporator body, 3
...Evaporator lid, 6...Solvent container,
14...Brim part, 29...Rod-shaped heat vibrator, 33...Seal body, 34...
Inner wall.

Claims (7)

[Scope of utility model registration request] (1) The solvent container of the evaporator that removably houses the solvent container so as to heat and evaporate the loaded solvent for solvent recovery is characterized in that the solvent container is formed into a heat pipe structure. Solvent container of evaporator for solvent recovery. (2) A solvent container for an evaporator for solvent recovery according to claim 1, wherein the solvent container has a bottomed cylindrical heat pipe structure. (3) A solvent container for a solvent recovery evaporator according to claim 1, wherein the bottom of the solvent container has a flat heat pipe structure. (4) Utility model registration claim No. 1, in which rod-shaped heat pipes are arranged at regular intervals on the side surface of the solvent container, and the lower ends of the rod-shaped heat pipes are connected to the bottom of the flat plate-shaped heat pipe structure. A solvent container for the evaporator for solvent recovery according to item 1. (5) The evaporator for solvent recovery according to any one of claims 1 to 4 of the utility model registration claims, wherein the solvent container is removably installed in the evaporator so as to serve as the inner peripheral wall of the evaporator. solvent container. (6) A collar is provided in the upper layer of the solvent container, extending outward all the way around, and the collar is air-tight between the evaporator body and the evaporator lid body, which is attached to the evaporator body so as to be openable and closable. 5. A solvent container for a solvent recovery evaporator according to claim 5, wherein the solvent container is sandwiched between the two. (7) A utility model in which a sealing body is provided around the lower periphery of the evaporator lid that is attached to the evaporator body so as to be openable and closable, and the upper periphery of the solvent container is airtightly contacted with the sealing body. A solvent container for an evaporator for solvent recovery according to registered claim 5.