A solvent recovery vessel

Abstract

The utility model discloses a solvent recovery ware, it belongs to chemical industry equipment technical field, including cylinder, be equipped with spiral baffle in the cylinder, be equipped with a plurality of joints on the cylinder lateral wall corresponding to the medium flow through spiral route in the cylinder, the detachable connection of joint has the tube bundle, and the one end of tube bundle can be inserted into the cylinder through the joint, and the other end of tube bundle is connected with the pipe box through the pipe plate, is equipped with the range baffle in the pipe box, and the pipe box lateral wall on range baffle both sides is equipped with refrigerant import and refrigerant export respectively. The above structure can improve the energy utilization rate, and the dismounting maintenance of tube bundle is convenient.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a solvent recovery device. Background Technology

[0002] Heat exchangers are crucial equipment in chemical production processes, playing a vital role in the heat exchange between hot and cold fluids. Statistics show that heat exchangers account for over 20% of total equipment investment and are key components for optimizing chemical processes and heat exchange networks. Their efficiency and reliability directly impact the normal operation of chemical production.

[0003] With increasingly stringent environmental protection requirements, the recovery of organic matter and heat from exhaust gas or flue gas is a problem that chemical plants must consider. How to reduce environmental pressure and increase efficiency has become a necessary means for chemical plants to consider under increasingly severe competitive pressure.

[0004] In traditional exhaust gas or flue gas treatment processes, the gas source flow rate is large, the heat exchanger volume is large, the heat source is singular, the heat exchange effect is low, and the recovery of organic matter and heat source is incomplete.

[0005] In view of the problems existing in the prior art, this utility model designs and manufactures a solvent recovery device to overcome the above defects. Summary of the Invention

[0006] To address the problems existing in the prior art, this utility model provides a solvent recovery device that can improve energy utilization and facilitate the disassembly and maintenance of the tube bundle.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a solvent recovery device, including a cylinder, wherein a spiral baffle is provided in the cylinder, and a plurality of joints are provided on the side wall of the cylinder corresponding to the spiral path of the medium flow in the cylinder. The connector is detachably connected to a tube bundle. One end of the tube bundle can be inserted into the cylinder through the connector, and the other end of the tube bundle is connected to a tube box through a tube sheet. The tube box is provided with a partition plate, and a refrigerant inlet and a refrigerant outlet are respectively provided on the side walls of the tube box on both sides of the partition plate.

[0008] Preferably, the joint end is provided with a joint flange, the pipe box is provided with a pipe box flange, and the tube sheet of the tube bundle is sealed and clamped between the joint flange and the pipe box flange.

[0009] Preferably, the axis of the joint forms an angle with the radial line of the cylinder at the joint location, and the axis of the joint is inclined in the direction of medium flow.

[0010] Preferably, several of the joints are circumferentially distributed on the cylinder in a spiral path for medium flow.

[0011] Preferably, the types of refrigerant in the tube bundles at different locations are different, and / or the refrigerant temperatures are different.

[0012] Preferably, the heat exchange tubes of the tube bundle are spirally wound from the tube sheet to the far end, then bend back in a U-shape, and then spirally wound back to the tube sheet in the opposite direction.

[0013] Preferably, the heat exchange tubes of the tube bundle are inclined in a serpentine shape from the tube sheet to the far end, and then in a reverse inclined serpentine shape back to the tube sheet.

[0014] Preferably, a pull lug is provided on the tube sheet near the tube box side.

[0015] Preferably, the cylinder is provided with end caps at both ends, one end of the end cap is provided with an exhaust gas inlet, and the other end of the end cap is provided with a condensate outlet and / or a non-condensable gas outlet.

[0016] Preferably, the cylinder is provided with connecting flanges at both ends.

[0017] The advantages of this utility model are: 1. This utility model solves the problem of low heat exchange efficiency caused by the single refrigerant in traditional exhaust gas coolers by detachably connecting heat exchange tube bundles to the side wall of the cylinder with spiral baffles. By utilizing multiple refrigerants, the energy utilization rate or heat recovery rate is improved. On the other hand, the detachable tube bundles facilitate disassembly and maintenance, and solve the problem of leakage maintenance caused by the easy corrosion of tube bundles by exhaust gas or flue gas.

[0018] 2. The arrangement and angle of the connectors in this utility model can ensure that the tube bundle is in full contact with the flue gas and exhaust gas after it is inserted into the cylinder, thereby further improving the heat exchange efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a solvent recovery device in which the tube bundle of Embodiment 1 is installed; Figure 2 This is a top view of the tube bundle distribution when the tube bundle of Embodiment 1 is installed in this utility model; Figure 3 This is a schematic diagram of the present invention after the tube bundle has been removed; Figure 4 This is a schematic diagram of Embodiment 1 of the present utility model; Figure 5 This is a schematic diagram of the present invention with the tube bundle of Embodiment 2 installed; Figure 6 This is a top view of the tube bundle distribution when the tube bundle of Embodiment 2 is installed in this utility model; Figure 7 This is a schematic diagram of Embodiment 2 of the present invention; Figure 8This is a schematic diagram of the present invention, showing that the cylinder body has connecting flanges at both ends and the tube bundle of Embodiment 1 is installed. Figure 9 This is a schematic diagram of the present invention, showing that the cylinder body has connecting flanges at both ends and the tube bundle of Embodiment 2 is installed.

[0020] In the diagram: 1. Shell; 2. Spiral baffle; 3. Joint; 4. End cap; 5. Exhaust gas inlet; 6. Non-condensable gas outlet; 7. Condensate outlet; 8. Tube bundle; 9. Connecting flange; 31. Joint flange; 81. Heat exchange tube; 82. Tube sheet; 83. Tube box; 84. Baffle plate; 85. Pull lug; 86. Tube box flange. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0022] like Figures 1 to 9 As shown, a solvent recovery device includes a cylinder 1 with a spiral baffle 2 inside the cylinder 1. After the exhaust gas or flue gas enters the cylinder 1 through one end, it will be guided to flow spirally along the spiral baffle 2, thereby increasing the heat exchange length inside the cylinder 1.

[0023] Several joints 3 are provided on the side wall of the cylinder 1 corresponding to the spiral route of the medium flow inside the cylinder 1. A tube bundle 8 is detachably connected to the joint 3. One end of the tube bundle 8 can be inserted into the cylinder 1 through the joint 3, and the other end of the tube bundle 8 is connected to the tube box 83 through the tube plate 82. A partition plate 84 is provided inside the tube box 83. A refrigerant inlet and a refrigerant outlet are respectively provided on the side wall of the tube box 83 on both sides of the partition plate 84.

[0024] The exhaust gas or flue gas and other media will exchange heat with the tube bundle 8 in the spiral flow path. The different types of refrigerants and / or refrigerant temperatures in the tube bundle 8 at different locations can further improve energy utilization or heat recovery rate.

[0025] For example, in one case: a factory's exhaust gas at 120℃ contains corrosive media and a small amount of organic matter. Following the exhaust gas flow direction, the tube bundle 8 uses three types of refrigerant: circulating water, 7-degree water, and chilled brine. Through a tiered cooling structure, the organic matter is recovered, and the exhaust gas meets standards before entering the adsorption equipment. This approach significantly reduces energy consumption compared to using a pure chilled brine refrigeration unit, while also achieving substantial energy savings.

[0026] Specifically, the connector 3 is provided with a connector flange 31 at its end, and the tube box 83 is provided with a tube box flange 86. The tube sheet 82 of the tube bundle 8 is sealed and clamped between the connector flange 31 and the tube box flange 86. In this way, the tube bundle 8 can be disassembled and the refrigerant can flow in a sealed manner within the tube bundle 8.

[0027] The axis of connector 3 forms an angle with the radial line of the cylinder 1 at the location of connector 3, and the axis of connector 3 is inclined in the direction of medium flow, as shown in the figure. Since flue gas and exhaust gas flow downward, connector 3 is inclined downward. Preferably, several connectors 3 are evenly distributed circumferentially on the cylinder 1 in a spiral path for medium flow. The arrangement and setting angle of the connectors 3 ensure that the tube bundle 8 has sufficient contact with the flue gas and exhaust gas after it is inserted into the cylinder 1, further improving the heat exchange efficiency.

[0028] The winding structure of the tube bundle 8 of this utility model can be reasonably selected according to needs: Example 1:

[0029] The heat exchange tubes 81 of the tube bundle 8 are spirally wound from the tube sheet 82 to the far end, then bend back in a U-shape, and then spirally wound back to the tube sheet 82 in the opposite direction. Example 2:

[0030] The heat exchange tubes 81 of the tube bundle 8 extend from the tube sheet 82 in an inclined serpentine shape to the far end, and then extend back to the tube sheet 82 in a reverse inclined serpentine shape, forming a shape similar to a Chinese knot.

[0031] Both embodiments have a small structural form, a simple winding method, and are lightweight, while still meeting the heat exchange requirements in terms of heat exchange efficiency.

[0032] The present invention has end caps 4 at both ends of the cylindrical body 1. One end cap 4 has a tail gas inlet 5, and the other end cap 4 has a condensate outlet 7 and / or a non-condensable gas outlet 6. Alternatively, both ends of the cylindrical body 1 are provided with connecting flanges 9, so that it can be directly connected to pipelines. The specific structure of both ends of the cylindrical body 1 can be adjusted according to the actual application.

[0033] In addition, a pull lug 85 is preferably provided on the tube plate 82 near the tube box 83. The pull lug 85 facilitates the installation of the tube bundle 8 into the connector 3. The pull lug 85 also facilitates the overall rotation of the tube bundle 8, thereby facilitating the flushing of the tube bundle 8 by flue gas or exhaust gas at different angles and positions.

[0034] The specific usage process of this utility model: Flue gas or exhaust gas enters the spiral baffle 2 area from one end of the cylinder 1 and comes into contact with the tube bundle 8 that extends into the side wall joint 3 of the cylinder 1 for heat exchange. The tube bundle 8 can use refrigerants with different temperature gradients. The exhaust gas or flue gas will rotate and cool down in a step-by-step manner, which can effectively reduce the refrigerant energy consumption. At the same time, it can also achieve deep cooling by controlling the refrigerant temperature, thereby reducing the organic content in the exhaust gas. After cooling, the exhaust gas undergoes gas-liquid separation at the end. The gas is discharged from the non-condensable gas outlet 6, and the liquid is output from the condensate outlet 7.

[0035] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A solvent recovery device, characterized in that, Includes a cylinder (1), in which a spiral baffle (2) is provided, and several joints (3) are provided on the side wall of the cylinder (1) corresponding to the spiral path of the medium flow inside the cylinder (1). The connector (3) is detachably connected to a tube bundle (8). One end of the tube bundle (8) can be inserted into the cylinder (1) through the connector (3). The other end of the tube bundle (8) is connected to a tube box (83) through a tube plate (82). A partition plate (84) is provided inside the tube box (83). A refrigerant inlet and a refrigerant outlet are respectively provided on the side walls of the tube box (83) on both sides of the partition plate (84).

2. The solvent recovery device according to claim 1, characterized in that, The connector (3) is provided with a connector flange (31) at its end, and the tube box (83) is provided with a tube box flange (86). The tube sheet (82) of the tube bundle (8) is sealed and clamped between the connector flange (31) and the tube box flange (86).

3. A solvent recovery device according to claim 1, characterized in that, The axis of the connector (3) forms an angle with the radial line of the cylinder (1) at the position of the connector (3), and the axis of the connector (3) is inclined in the direction of medium flow.

4. A solvent recovery device according to claim 1 or 3, characterized in that, Several of the joints (3) are evenly distributed around the cylinder (1) in a spiral path for medium flow.

5. A solvent recovery device according to claim 1, characterized in that, The types of refrigerant in the tube bundle (8) at different locations are different, and / or the refrigerant temperatures are different.

6. A solvent recovery device according to claim 1, characterized in that, The heat exchange tubes (81) of the tube bundle (8) are spirally wound from the tube sheet (82) to the far end and then U-shaped back, and then spirally wound back to the tube sheet (82) in the opposite direction.

7. A solvent recovery device according to claim 1, characterized in that, The heat exchange tubes (81) of the tube bundle (8) extend from the tube sheet (82) in an inclined serpentine shape to the far end, and then extend to the tube sheet (82) in a reverse inclined serpentine shape.

8. A solvent recovery device according to claim 1, characterized in that, A pull lug (85) is provided on the tube plate (82) near the tube box (83).

9. A solvent recovery device according to claim 1, characterized in that, The cylinder (1) has end caps (4) at both ends. One end of the end cap (4) has a tail gas inlet (5), and the other end of the end cap (4) has a condensate outlet (7) and / or a non-condensable gas outlet (6).

10. A solvent recovery device according to claim 1, characterized in that, The cylinder (1) is provided with connecting flanges (9) at both ends.

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