Alkyd paint diluent rectification process tail gas receiving separation device

Abstract

The utility model is suitable for alcohol acid paint diluent processing technical field provides an alcohol acid paint diluent rectification processing tail gas receiving separation device, including the box, the inside of box is equipped with L shaped baffle, L shaped baffle will the inside of box be divided into first chamber and second chamber, second chamber is located the top of L shaped baffle, the top surface of box is located the top of second chamber and is equipped with the liquid inlet pipe, the inside of second chamber is equipped with condensate. The scheme is through first chamber and second chamber, preliminary separation to rectification tail gas, remove the solvent steam of higher boiling point that remains in tail gas, and tail gas carries out steady pressure and buffer in first chamber, reduced the fluctuation of pressure and flow, in addition, through the adsorption and filtration of impurity in tail gas of cylinder, further reduce the content of impurity and harmful substance in tail gas, make the tail gas that enters subsequent core separation unit is more pure and stable.

Description

Technical Field

[0001] This utility model belongs to the field of alkyd paint thinner processing technology, and in particular relates to a receiving and separating device for tail gas of alkyd paint thinner distillation processing. Background Technology

[0002] In the distillation recovery process of alkyd paint thinner, the solvent vapor separated by the distillation column enters the condenser. Most of the solvent (such as xylene, No. 200 solvent oil, etc.) is condensed into liquid and recovered. However, some gases with extremely low boiling points or that are not condensable (such as air, a small amount of light component solvent vapor, water vapor, etc.) cannot be condensed; this part of the gas is the distillation tail gas.

[0003] Before entering the core separation unit, the exhaust gas needs to be stably received and pretreated. Currently, the commonly used method is to directly connect the condenser outlet to the subsequent treatment equipment through a simple pipeline. The drawback of this method is the lack of effective buffering and pressure stabilization measures, resulting in large fluctuations in pressure and flow rate of the exhaust gas when it enters the core separation unit, which can easily affect the stable operation and treatment effect of the subsequent separation equipment. Moreover, it does not effectively separate and filter the small amount of droplets and impurities that may be carried in the exhaust gas, increasing the difficulty and cost of subsequent treatment.

[0004] Therefore, it is of great significance to develop a device that can effectively receive and stabilize exhaust gas pressure and flow, and perform preliminary separation of impurities in the exhaust gas. Utility Model Content

[0005] The purpose of this invention is to provide a receiving and separating device for the tail gas of alkyd paint diluent distillation process, so as to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a receiving and separating device for tail gas from the distillation of alkyd paint thinner, comprising a housing, wherein an L-shaped partition is provided inside the housing, the L-shaped partition dividing the interior of the housing into a first chamber and a second chamber, the second chamber being located above the L-shaped partition, and an inlet pipe passing through the top surface of the housing above the second chamber, wherein condensate is provided inside the second chamber;

[0007] The side wall of the box is provided with an air inlet pipe that communicates with the first chamber, the top surface of the box is provided with an air outlet pipe that communicates with the first chamber, the free end of the air outlet pipe is connected to a cylinder, the bottom of the cylinder is connected to the air outlet pipe, the top of the cylinder is connected to a guide pipe, and the inside of the cylinder is provided with an adsorbent layer.

[0008] Preferably, the side wall of the box is connected to the bottom of the second chamber via a first liquid outlet pipe, and the side wall of the box is connected to the bottom of the first chamber via a second liquid outlet pipe.

[0009] Preferably, the cylinder includes a top cylinder and a bottom cylinder, which are arranged sequentially from top to bottom, and the top cylinder and the bottom cylinder are threadedly connected.

[0010] Preferably, the top and bottom of the adsorbent layer are provided with stainless steel mesh.

[0011] Preferably, the air outlet pipe is connected to the cylinder body by a nut.

[0012] Preferably, the air duct is connected to a control valve.

[0013] This utility model has at least the following beneficial effects:

[0014] This invention provides a receiving and separating device for tail gas from the distillation process of alkyd paint thinner. The device uses a first chamber and a second chamber to initially separate the distillation tail gas, removing residual solvent vapors with high boiling points. The tail gas is also stabilized and buffered in the first chamber, reducing pressure and flow fluctuations. Furthermore, the device uses a cylinder to adsorb and filter impurities in the tail gas, further reducing the content of impurities and harmful substances, making the tail gas entering the subsequent core separation unit purer and more stable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the box of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the cylinder of this utility model.

[0018] In the attached diagram, the following are the reference numerals: 1. Box body; 2. L-shaped partition; 3. Liquid inlet pipe; 4. First liquid outlet pipe; 5. Air inlet pipe; 6. Air outlet pipe; 7. Second liquid outlet pipe; 8. Top cylinder; 9. Bottom cylinder; 10. Air guide pipe; 11. Stainless steel mesh; 12. Adsorbent layer; 13. First chamber; 14. Second chamber. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0020] Example

[0021] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a technical solution: a receiving and separating device for tail gas from the distillation of alkyd paint thinner, including a box 1, with an L-shaped partition 2 inside the box 1. Specifically, the L-shaped partition 2 is fixedly connected to the inner wall of the box 1, and the L-shaped partition 2 divides the interior of the box 1 into a first chamber 13 and a second chamber 14. The second chamber 14 is located above the L-shaped partition 2, and an inlet pipe 3 is inserted through the top surface of the box 1 above the second chamber 14. Specifically, the inlet pipe 3 is fixedly connected to the second chamber 14, and the interior of the second chamber 14 contains condensate.

[0022] The side wall of the box 1 is provided with an air inlet pipe 5 that is connected to the first chamber 13. The top surface of the box 1 is provided with an air outlet pipe 6 that is connected to the first chamber 13. The free end of the air outlet pipe 6 is connected to a cylinder. The bottom of the cylinder is connected to the air outlet pipe 6. The top of the cylinder is connected to a gas guide pipe 10. The inside of the cylinder is provided with an adsorbent layer 12. Specifically, the adsorbent layer 12 is activated carbon or zeolite molecular sieve, etc.

[0023] In this embodiment, condensate is injected into the second chamber 14 through the liquid inlet pipe 3, and exhaust gas is introduced into the first chamber 13 through the air inlet pipe 5. The exhaust gas in the first chamber 13 is cooled and the residual high-boiling-point solvent vapor in the exhaust gas is removed by condensation, which reduces the load on the subsequent units and recovers some solvent. The solvent in the exhaust gas condenses to the bottom of the first chamber 13.

[0024] The condensed exhaust gas enters the cylinder, where the impurities are desorbed using the porous structure of adsorbents such as activated carbon or zeolite molecular sieves. The treated exhaust gas is then discharged through the gas guide pipe 10 for subsequent operations.

[0025] Furthermore, the side wall of the box 1 is connected to the bottom of the second chamber 14 and is provided with a first liquid outlet pipe 4, and the side wall of the box 1 is connected to the bottom of the first chamber 13 and is provided with a second liquid outlet pipe 7.

[0026] In this embodiment, the condensate in the second chamber 14 is discharged through the first outlet pipe 4; the condensate in the first chamber 13 is discharged through the second outlet pipe 7 for recycling.

[0027] Furthermore, the cylinder body includes a top cylinder 8 and a bottom cylinder 9, which are arranged sequentially from top to bottom, and are threadedly connected to each other.

[0028] In this embodiment, the top cylinder 8 and the bottom cylinder 9 are threaded together, which facilitates disassembly and installation.

[0029] Furthermore, stainless steel mesh 11 is provided on the top and bottom of the adsorbent layer 12.

[0030] In this embodiment, the adsorbent layer 12 is isolated and confined by setting a stainless steel mesh 11.

[0031] Furthermore, the vent pipe 6 is connected to the cylinder body via a nut.

[0032] In this embodiment, the air outlet pipe 6 is connected to the cylinder body by a nut for easy disassembly.

[0033] Furthermore, the air duct 10 is connected to a control valve.

[0034] In this embodiment, the opening and closing of the gas delivery pipe 10 is controlled by a control valve to ensure the adsorption effect.

[0035] The working principle and usage process of this utility model: After the utility model is installed, work according to the above implementation method until all working steps are completed.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for receiving and separating tail gas from the distillation process of alkyd paint thinner, characterized in that, Includes a housing (1), the housing (1) is provided with an L-shaped partition (2) inside, the L-shaped partition (2) divides the interior of the housing (1) into a first chamber (13) and a second chamber (14), the second chamber (14) is located above the L-shaped partition (2), the top surface of the housing (1) is provided with a liquid inlet pipe (3) above the second chamber (14), and the interior of the second chamber (14) is provided with condensate; The side wall of the box (1) is provided with an air inlet pipe (5) that communicates with the first chamber (13). The top surface of the box (1) is provided with an air outlet pipe (6) that communicates with the first chamber (13). The free end of the air outlet pipe (6) is connected to a cylinder. The bottom of the cylinder is connected to the air outlet pipe (6). The top of the cylinder is connected to a guide pipe (10). The inside of the cylinder is provided with an adsorbent layer (12).

2. The alkyd paint thinner distillation process tail gas receiving and separating device according to claim 1, characterized in that: The side wall of the box (1) is connected to the bottom of the second chamber (14) and is provided with a first liquid outlet pipe (4). The side wall of the box (1) is connected to the bottom of the first chamber (13) and is provided with a second liquid outlet pipe (7).

3. The alkyd paint thinner distillation process tail gas receiving and separating device according to claim 1, characterized in that: The cylinder body includes a top cylinder (8) and a bottom cylinder (9), which are arranged sequentially from top to bottom, and are threadedly connected.

4. The alkyd paint thinner distillation process tail gas receiving and separating device according to claim 1, characterized in that: The top and bottom of the adsorbent layer (12) are provided with stainless steel mesh (11).

5. The alkyd paint thinner distillation process tail gas receiving and separating device according to claim 1, characterized in that: The air outlet pipe (6) is connected to the cylinder body by a nut.

6. The alkyd paint thinner distillation process tail gas receiving and separating device according to claim 1, characterized in that: The air duct (10) is connected to a control valve.

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