Organic solvent recovery tank

Abstract

The utility model relates to an organic solvent recovery tank, which effectively solves the problems of low adsorption efficiency and low desorption steam energy efficiency of the existing adsorption tank. According to the technical scheme, the device comprises a tank body, a vertical shaft is installed at the axis of the tank body, a plurality of layers of adsorption units are vertically distributed in the tank body at intervals, the outer ends of branch air channels make contact with the inner walls of the adsorption units, and the inner ends of the branch air channels are communicated with a main air channel; a vertical plunger is arranged at the upper end of the vertical shaft, a pressure spring is mounted on the plunger, the lower end of the plunger can be inserted into a port of the main air passage to seal the main air passage, the plunger is pulled out of the main air passage, and the port of the main air passage is opened; a cam is arranged at the upper end of the plunger, and the cam rotates to press the plunger downwards. The adsorption unit disclosed by the utility model can simultaneously realize multidirectional air intake, so that the adsorption efficiency is greatly improved; during desorption, the pressure in the tank body can be continuously increased, the contact reaction time of steam and activated carbon is prolonged, the utilization rate of the steam is increased, and the energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the field of organic solvent recovery, in particular to an organic solvent recovery tank. Background Art

[0002] In the production process of adhesive tape, toluene is needed as a solvent. During the production of adhesive tape, toluene will gradually evaporate. Generally, the evaporated toluene is recovered as much as possible, which can reduce pollution to the environment, reduce production costs, and achieve the purpose of reuse.

[0003] The utility model patent with application number: CN201320493479.8 discloses a toluene recovery device, which adsorbs toluene through an activated carbon layer, and then desorbs toluene in the activated carbon through high-pressure water vapor to achieve circulation; the activated carbon layer of the patent is a single-layer setting, and can only pass through one direction from one end of the activated carbon layer to the other end, and its flow area is limited. The activated carbon layer gradually participates in adsorption from the inlet end to the outlet end. After the activated carbon in the front section is saturated with adsorption, the activated carbon in the rear end gradually begins to adsorb, that is, the activated carbon cannot participate in adsorption at the same time, which cannot give full play to the adsorption capacity of the activated carbon layer, limiting the improvement of adsorption efficiency;

[0004] In addition, during the desorption stage, the air intake and exhaust in the tank are carried out simultaneously, and the steam passes through the tank in a continuous flow manner, which makes the pressure increase in the tank slow, and the contact reaction time between the steam and the activated carbon is effective, and the desorption efficiency of the steam cannot be fully utilized. The steam is not fully utilized and the energy efficiency is low. Summary of the invention

[0005] The utility model provides an organic solvent recovery tank, which effectively solves the problems of low adsorption efficiency and low desorption steam energy efficiency of the existing adsorption tank.

[0006] The technical solution includes a cylindrical tank body, which is provided with a solvent inlet and a steam inlet, a vertical shaft is installed at the axis of the tank body, and a plurality of layers of adsorption units are distributed in the tank body at intervals from top to bottom, each layer of adsorption unit includes an annular mesh cage, and the mesh cage is filled with activated carbon particles, the mesh cage is arranged on the vertical shaft, and the inner wall of the mesh cage is in contact with the outer wall of the vertical shaft, a vertical main airway and a plurality of layers of branch airways are opened in the vertical shaft, the upper end of the main airway is open, the branch airways correspond to the adsorption units layer by layer, the outer end of the branch airway is in contact with the inner wall of the mesh cage, and the inner end is connected with the main airway;

[0007] A vertical plunger is provided at the upper end of the vertical axis. The plunger can move up and down. A compression spring is installed on the plunger to make it bounce upward. The lower end of the plunger can be inserted into the port of the main airway to close the main airway. At this time, the compression spring is in a compressed state. When the compression spring is at its original length, the plunger is pulled out of the main airway and the main airway port is opened. A cam is provided at the upper end of the plunger, and the rotation of the cam can press the plunger downward.

[0008] A horizontal pressing plate is fixed on the upper end of the plunger, and the cam is in contact with the pressing plate.

[0009] A vertical guide rod is fixed on the upper end of the tank body, and a pressure plate is passed through the guide rod.

[0010] An axial sleeve is arranged between every two adjacent layers of adsorption units, and the axial sleeve is arranged on the vertical axis.

[0011] Each layer of bronchial passages includes a plurality of bronchial passages evenly distributed around the circumference.

[0012] The adsorption unit of the utility model can simultaneously take in air in multiple directions, greatly improving the adsorption efficiency; during desorption, the pressure in the tank body can be continuously increased and the contact reaction time of steam and activated carbon can be prolonged, thereby improving the utilization rate of steam and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front cross-sectional view of the utility model when the main airway is closed.

[0014] Figure 2 It is a front cross-sectional view of the utility model when the main airway is opened.

[0015] Figure 3 It is a top cross-sectional view of the present invention. DETAILED DESCRIPTION

[0016] In conjunction with the accompanying drawings, the utility model includes a cylindrical tank body 1, on which a solvent inlet 2 and a steam inlet 3 are provided, a vertical shaft 4 is installed at the axis of the tank body 1, and a plurality of layers of adsorption units are distributed in the tank body 1 at intervals from top to bottom, each layer of the adsorption unit includes an annular mesh cage 5, in which activated carbon particles 6 are filled, the mesh cage 5 is penetrated on the vertical shaft 4, and the inner wall of the mesh cage 5 is in contact with the outer wall of the vertical shaft 4, a vertical main airway 7 and a plurality of layers of branch airways 8 are provided in the vertical shaft 4, the upper end of the main airway 7 is open, the branch airways 8 correspond to the adsorption units layer by layer, the outer end of the branch airway 8 is in contact with the inner wall of the mesh cage 5, and the inner end is connected with the main airway 7; the gas or steam containing the organic solvent enters the tank body 1, passes through the adsorption unit, enters the main airway 7 through the branch airway 8, and is discharged from the upper port of the main airway 7;

[0017] A vertical plunger 9 is provided at the upper end of the vertical axis 4. The plunger 9 can move up and down. A compression spring 10 is installed on the plunger 9 to make it bounce upward. The lower end of the plunger 9 can be inserted into the port of the main airway 7 to close the main airway 7. At this time, the compression spring 10 is in a compressed state. When the compression spring 10 is at its original length, the plunger 9 is pulled out of the main airway 7, and the port of the main airway 7 is opened; a cam 11 is provided at the upper end of the plunger 9. The cam 11 can press the plunger 9 downward by rotating. The cam 11 has a far repose angle, and when the plunger 9 is pressed down to the lowest position, it can be maintained for a period of time, that is, during the process of the cam 11 rotating one circle, the main airway 7 is in a closed state for a period of time.

[0018] A horizontal pressure plate 12 is fixed to the upper end of the plunger 9 , and the cam 11 is in contact with the pressure plate 12 , ensuring that the pressure of the cam 11 acts on the plunger 9 reliably and continuously.

[0019] A vertical guide rod 13 is fixed to the upper end of the tank body 1 , and the pressure plate 12 is passed through the guide rod 13 . The guide rod 13 guides and limits the up and down movement of the pressure plate 12 and the plunger 9 .

[0020] An axial sleeve 14 is provided between every two adjacent layers of adsorption units. The axial sleeve 14 is sleeved on the vertical shaft 4 and is used to maintain the spacing between the adsorption units.

[0021] Each layer of the bronchial channels 8 includes a plurality of bronchial channels evenly distributed around the circumference, which can increase the gas discharge speed and thus improve the adsorption efficiency.

[0022] During adsorption, the cam 11 of the utility model is in a stationary state, the port of the main airway 7 is opened, the gas containing the organic solvent enters the tank body 1 from the solvent inlet 2, and passes through the activated carbon layer of the adsorption unit, the organic solvent is adsorbed by the activated carbon, and the filtered gas is merged into the main airway 7 through the branch airway 8, and then discharged from the upper end of the main airway 7.

[0023] During desorption, the cam 11 rotates at a constant speed, driving the plunger 9 to move up and down reciprocatingly, and high-temperature steam enters the tank body 1 from the steam inlet 3. During the process of the plunger 9 inserting into the main airway 7 to close the main airway 7, the pressure in the tank body 1 will continue to increase. During this period of time, the steam is in full contact with the activated carbon in the tank body 1, and the organic solvent adsorbed in the activated carbon is removed; when the plunger 9 moves up and is pulled out from the main airway 7, the steam in the tank body 1 is connected to the removed organic solvent gas and discharged from the main airway 7, and the exhaust gas is collected and subjected to subsequent condensation and separation processes.

[0024] The utility model makes full use of the space in the tank body 1 through the layered adsorption unit design, and the gas can pass through the adsorption unit from all directions, thereby greatly improving the adsorption efficiency; during desorption, the cam 11 drives the plunger 9 to intermittently close and open the main airway 7, which can continuously increase the pressure in the tank body 1 and extend the contact reaction time of steam and activated carbon, thereby improving the utilization rate of steam and reducing energy consumption.

Claims

1. An organic solvent recovery tank, comprising a cylindrical tank body (1), the tank body (1) being provided with a solvent inlet (2) and a steam inlet (3), characterized in that: A vertical shaft (4) is installed at the axis of the tank body (1), and a plurality of layers of adsorption units are arranged at intervals in the tank body (1). Each layer of adsorption units includes an annular mesh cage (5), and the mesh cage (5) is filled with activated carbon particles (6). The mesh cage (5) is inserted into the vertical shaft (4), and the inner wall of the mesh cage (5) is in contact with the outer wall of the vertical shaft (4). A vertical main airway (7) and a plurality of layers of branch airways (8) are opened in the vertical shaft (4). The upper end of the main airway (7) is open, and the branch airways (8) correspond to the adsorption units layer by layer. The outer end of the branch airway (8) is in contact with the inner wall of the mesh cage (5), and the inner end is connected with the main airway (7). A vertical plunger (9) is provided at the upper end of the vertical shaft (4). The plunger (9) can move up and down. A compression spring (10) is installed on the plunger (9) to make it bounce upward. The lower end of the plunger (9) can be inserted into the port of the main airway (7) to close the main airway (7). At this time, the compression spring (10) is in a compressed state. When the compression spring (10) is at its original length, the plunger (9) is pulled out of the main airway (7) and the port of the main airway (7) is opened. A cam (11) is provided at the upper end of the plunger (9). The cam (11) can be rotated to press the plunger (9) downward.

2. An organic solvent recovery tank according to claim 1, characterized in that: A horizontal pressing plate (12) is fixed to the upper end of the plunger (9), and the cam (11) is in contact with the pressing plate (12).

3. An organic solvent recovery tank according to claim 2, characterized in that: A vertical guide rod (13) is fixed to the upper end of the tank body (1), and the pressure plate (12) is inserted into the guide rod (13).

4. An organic solvent recovery tank according to claim 1, characterized in that: An axial sleeve (14) is provided between every two adjacent layers of adsorption units, and the axial sleeve (14) is sleeved on the vertical shaft (4).

5. The organic solvent recovery tank according to claim 1, characterized in that: Each layer of the bronchial passages (8) includes a plurality of bronchial passages evenly distributed around the circumference.

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