Multistage spiral solvent removing device

Abstract

The utility model relates to a multi-stage spiral solvent removal device, which belongs to the technical field of solvent separation and comprises a first-stage spiral solvent removal mechanism, a second-stage spiral solvent removal mechanism and a third-stage spiral solvent removal mechanism which are sequentially connected from top to bottom. Through the arrangement of the first-stage spiral solvent removing mechanism, the second-stage spiral solvent removing mechanism and the third-stage spiral solvent removing mechanism which are sequentially connected from top to bottom, the first-stage spiral solvent removing mechanism is used for primarily heating materials, and the primarily heated materials enter the second-stage spiral solvent removing mechanism; in the process, the whole material is uniformly heated, the volatilization effect of the organic solvent is good, meanwhile, the spiral feeder is adopted for feeding, uninterrupted continuous feeding can be achieved, the quantity of products heated each time is large, the efficiency of removing the organic solvent is greatly improved, and the production requirement can be met.

Description

Technical Field

[0001] The present application relates to the technical field of solvent separation, and in particular to a multi-stage spiral solvent removal device. Background Art

[0002] Acetone (CH3COCH3), also known as dimethyl ketone, is the simplest saturated ketone. It is a colorless, transparent liquid with a special pungent smell. It is easily soluble in water and organic solvents such as methanol, ethanol, ether, chloroform, and pyridine. It is flammable, volatile, and has relatively active chemical properties. At present, the industrial production of acetone in the world is mainly based on the cumene method. Acetone is mainly used as a solvent in the explosives, plastics, rubber, fiber, leather, oils, spray paint and other industries in industry. It can also be used as an important raw material for the synthesis of ketene, acetic anhydride, iodoform, polyisoprene rubber, methyl methacrylate, chloroform, epoxy resin and other substances.

[0003] Acetone is used as a solvent to assist in production in many chemical powders. After production is completed, the acetone needs to be removed. In the prior art, there are various desolventizing devices, which usually heat the product to make the organic solvent in the product reach the boiling point and evaporate. The use of heating to remove organic solvents is prone to incomplete removal due to uneven heating inside and outside the product; at the same time, in order to remove as much organic solvent as possible, the amount of product heated each time cannot be large, resulting in low efficiency in removing organic solvents, which is difficult to meet production requirements.

[0004] Therefore, there is an urgent need to develop a solvent removal device that can heat the product evenly and has a continuous removal function. Utility Model Content

[0005] The purpose of the present application is to provide a multi-stage spiral solvent removal device to solve the problems raised in the above background technology.

[0006] To achieve the above purpose, the present application provides a multi-stage spiral solvent removal device using the following technical solution:

[0007] A multi-stage spiral desolventizing device, comprising a primary spiral desolventizing mechanism, a secondary spiral desolventizing mechanism and a tertiary spiral desolventizing mechanism which are sequentially connected from top to bottom, wherein the primary spiral desolventizing mechanism comprises a first spiral feeder, a coil is arranged on the side wall of the shell of the first spiral feeder, a feed trough and an upstream negative pressure device are connected at the top of the first spiral feeder, and the upstream negative pressure device is arranged on the side close to the discharge end of the first spiral feeder;

[0008] The secondary spiral desolventizing mechanism comprises a second spiral feeder, the feeding end of the second spiral feeder is connected to the discharging end of the first spiral feeder, a steam jacket is arranged on the side wall of the shell of the second spiral feeder, and a nitrogen inlet is also arranged on the side wall of the shell of the second spiral feeder;

[0009] The three-stage spiral desolventizing mechanism comprises a third spiral feeder, the feeding end of the third spiral feeder is connected to the discharging end of the second spiral feeder, and a cooling water jacket is provided on the side wall of the shell of the third spiral feeder;

[0010] The surface cover of the second screw feeder is provided with a dust removal tank connected to the shell of the second screw feeder, and the dust removal tank is externally connected to an exhaust fan. The shell of the second screw feeder close to the discharge end is connected to a first volatilization tube, and the first volatilization tube is connected to the dust removal tank. A second volatilization tube is connected between the shell of the third screw feeder and the dust removal tank.

[0011] Preferably, in order to facilitate material guiding, feeders are installed at the feeding ends of the second screw feeder and the third screw feeder, and a hose is connected to the feeder.

[0012] Preferably, a heat-insulating layer is fixed on the outer wall of the shell of the first screw feeder, and the coil is arranged between the outer wall of the shell of the first screw feeder and the heat-insulating layer.

[0013] By adopting the above technical solution, the thermal insulation layer can reduce heat loss, thereby saving energy.

[0014] Preferably, in order to facilitate regular maintenance of the dust removal tank, an inspection door is provided on the surface of the dust removal tank.

[0015] To summarize, the present application includes at least one of the following beneficial technical effects: the multi-stage spiral desolventizing device comprises a primary spiral desolventizing mechanism, a secondary spiral desolventizing mechanism and a tertiary spiral desolventizing mechanism which are sequentially connected from top to bottom. The primary spiral desolventizing mechanism is used to preliminarily heat the material, and the material after preliminarily heating enters the secondary spiral desolventizing mechanism. During this process, the material is heated evenly as a whole, and the organic solvent volatilization effect is good. At the same time, a spiral feeder is used to feed the material, which can achieve uninterrupted continuous feeding. A large amount of product is heated each time, which not only greatly improves the efficiency of removing organic solvents, but also meets production requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall front view structure of an embodiment of the present application.

[0017] Explanation of the reference numerals: 1. primary spiral desolventizing mechanism; 11. first spiral feeder; 12. coil; 13. feed trough; 14. upstream negative pressure device; 15. insulation layer; 2. secondary spiral desolventizing mechanism; 21. second spiral feeder; 22. steam jacket; 23. nitrogen inlet; 3. tertiary spiral desolventizing mechanism; 31. third spiral feeder; 32. cooling water jacket; 4. dust removal tank; 41. inspection door; 5. exhaust fan; 6. first volatilization tube; 7. second volatilization tube; 8. feeder. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1 This application is described in further detail.

[0019] The present application discloses a multi-stage spiral solvent removal device, referring to Figure 1 , including a primary spiral desolventizing mechanism 1, a secondary spiral desolventizing mechanism 2 and a tertiary spiral desolventizing mechanism 3 which are sequentially connected from top to bottom, the primary spiral desolventizing mechanism 1 includes a first spiral feeder 11, a coil 12 is arranged on the side wall of the shell of the first spiral feeder 11, a feed trough 13 and an upstream negative pressure device 14 are connected to the top of the first spiral feeder 11, and the upstream negative pressure device 14 is arranged on the side close to the discharge end of the first spiral feeder 11;

[0020] Steam is introduced into the coil 12 , and the material is transported unidirectionally in the first screw feeder 11 . The steam heats the material to increase its temperature, and the acetone solvent in the material evaporates. The evaporated gas is sucked away by the upstream negative pressure device 14 under negative pressure.

[0021] The secondary spiral desolventizing mechanism 2 comprises a second spiral feeder 21, the feeding end of the second spiral feeder 21 is connected to the discharging end of the first spiral feeder 11, a steam jacket 22 is provided on the shell side wall of the second spiral feeder 21, and a nitrogen inlet 23 is also provided on the shell side wall of the second spiral feeder 21;

[0022] The material coming out of the first screw feeder 11 is in the second screw feeder 21. The steam jacket 22 is heated to further increase the temperature of the material and improve the volatilization effect of acetone. At the same time, in order to ensure safety, nitrogen is introduced from the nitrogen inlet 23 for protection during this process.

[0023] The three-stage spiral desolventizing mechanism 3 includes a third spiral feeder 31, the feeding end of the third spiral feeder 31 is connected to the discharging end of the second spiral feeder 21, and a cooling water jacket 32 ​​is provided on the side wall of the shell of the third spiral feeder 31;

[0024] The material entering the third screw feeder 31 is cooled and discharged under the action of normal temperature cooling water.

[0025] The surface cover of the second screw feeder 21 is provided with a dust removal tank 4 connected to the shell of the second screw feeder 21, and an inspection door 41 is provided on the surface of the dust removal tank 4. The dust removal tank 4 is externally connected to an exhaust fan 5. The shell of the second screw feeder 21 near the discharge end is connected with a first volatilization tube 6, and the first volatilization tube 6 is connected to the dust removal tank 4. A second volatilization tube 7 is connected between the shell of the third screw feeder 31 and the dust removal tank 4.

[0026] Reference Figure 1 In order to facilitate material guiding, the feeding ends of the second screw feeder 21 and the third screw feeder 31 are both equipped with a feeder 8, and a hose is connected to the feeder 8.

[0027] Reference Figure 1 In order to save energy and reduce heat loss, a heat-insulating layer 15 is fixed on the outer wall of the shell of the first screw feeder 11 , and the coil 12 is arranged between the outer wall of the shell of the first screw feeder 11 and the heat-insulating layer 15 .

[0028] The implementation principle of a multi-stage spiral solvent removal device in the embodiment of the present application is:

[0029] The material is preliminarily heated by providing a first-stage spiral desolventizing mechanism 1, and the preliminarily heated material enters the second-stage spiral desolventizing mechanism 2. During this process, the material is heated evenly as a whole, and the organic solvent has a good volatilization effect. At the same time, the material is fed by a spiral feeder, which can realize uninterrupted continuous feeding. The amount of product heated each time is large, which not only greatly improves the efficiency of removing the organic solvent, but also can meet the production requirements. Finally, the material is cooled by the third-stage spiral desolventizing mechanism 3 to facilitate the next step of processing.

[0030] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, principle and application direction of the present application should be included in the protection scope of the present application.

Claims

1. A multi-stage spiral solvent removal device, characterized in that: The invention comprises a primary spiral desolventizing mechanism (1), a secondary spiral desolventizing mechanism (2) and a tertiary spiral desolventizing mechanism (3) which are sequentially connected from top to bottom, wherein the primary spiral desolventizing mechanism (1) comprises a first spiral feeder (11), a coil (12) is arranged on the side wall of the shell of the first spiral feeder (11), the top of the first spiral feeder (11) is connected to a feed trough (13) and an upstream negative pressure device (14), and the upstream negative pressure device (14) is arranged on the side close to the discharge end of the first spiral feeder (11). The secondary spiral desolventizing mechanism (2) comprises a second spiral feeder (21), the feeding end of the second spiral feeder (21) is connected to the discharging end of the first spiral feeder (11), a steam jacket (22) is arranged on the side wall of the shell of the second spiral feeder (21), and a nitrogen inlet (23) is also arranged on the side wall of the shell of the second spiral feeder (21). The three-stage spiral desolventizing mechanism (3) comprises a third spiral feeder (31), the feeding end of the third spiral feeder (31) is connected to the discharging end of the second spiral feeder (21), and a cooling water jacket (32) is provided on the side wall of the shell of the third spiral feeder (31). The surface cover of the second screw feeder (21) is provided with a dust removal tank (4) which is connected to the shell of the second screw feeder (21); the dust removal tank (4) is externally connected to an exhaust fan (5); the shell of the second screw feeder (21) near the discharge end is connected to a first volatilization tube (6); the first volatilization tube (6) is connected to the dust removal tank (4); and a second volatilization tube (7) is connected between the shell of the third screw feeder (31) and the dust removal tank (4).

2. The multi-stage spiral solvent removal device according to claim 1, characterized in that: The feeding ends of the second screw feeder (21) and the third screw feeder (31) are both equipped with a feeder (8), and a hose is connected to the feeder (8).

3. The multi-stage spiral solvent removal device according to claim 1, characterized in that: A heat-insulating layer (15) is fixed on the outer wall of the shell of the first screw feeder (11), and the coil (12) is arranged between the outer wall of the shell of the first screw feeder (11) and the heat-insulating layer (15).

4. The multi-stage spiral solvent removal device according to claim 1, characterized in that: The surface of the dust removal tank (4) is provided with an inspection door (41).

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