Tail gas waste heat recovery device for chemical device

Abstract

The utility model discloses a tail gas waste heat recovery device of a chemical device, and belongs to the technical field of waste heat recovery. A tail gas waste heat recovery device of a chemical device comprises a pipe body, a plurality of pipe bundle assemblies are arranged in the pipe body, the pipe bundle assemblies are connected in a sleeved mode, the front end and the rear end of the pipe body are detachably connected with a front end cover and a rear end cover respectively, and a gas outlet pipe is arranged at the position, close to the front end cover, of the pipe body. An air inlet pipe is arranged at the position, close to the rear end cover, of the pipe body. According to the utility model, the plurality of tube bundle assemblies are arranged and are sleeved to form the tube bundle, and the tube bundle assemblies can be taken out one by one in the dismounting process, so that the weight of the tube bundle can be dispersed, the tube bundle can be taken out more conveniently, and the problem that the whole tube body is relatively heavy and is inconvenient to take out is avoided; therefore, the problem that the tube bundle for waste heat recovery is inconvenient to disassemble in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and in particular to a waste heat recovery device for tail gas from a chemical plant. Background Technology

[0002] Chemical waste gas refers to the exhaust gas generated during chemical production. It has a certain temperature, and if not utilized, it leads to resource waste. Current technologies utilize waste heat recovery to recover and reuse this heat resource, thus avoiding waste.

[0003] In existing technologies, heat from waste gas is typically transferred to the medium that needs to be heated, such as water or air, through a heat exchanger to achieve the effect of waste heat recovery. Shell-and-tube heat exchangers are usually used for waste heat recovery.

[0004] The tube bundle is the core component of a shell-and-tube heat exchanger, responsible for transferring heat energy from one fluid to another. If the tube bundle leaks, corrodes, becomes clogged, or suffers other damage, it will affect the performance and efficiency of the heat exchanger, and may even lead to equipment failure. However, the tube bundles in the current technology are generally integral, which is cumbersome and inconvenient to disassemble, so improvements are needed. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the tube bundles for waste heat recovery in the prior art are inconvenient to disassemble, and to propose a waste heat recovery device for tail gas of chemical plants.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A waste heat recovery device for tail gas from a chemical plant includes a pipe body, in which a plurality of tube bundle assemblies are disposed, and the tube bundle assemblies are connected in a sleeve manner. A front end cover and a rear end cover are detachably connected to the front and rear ends of the pipe body, respectively.

[0008] Preferably, an air outlet pipe is provided on the pipe body near the front end cover, and an air inlet pipe is provided on the pipe body near the rear end cover.

[0009] Preferably, the front cover is provided with a water inlet pipe and the rear cover is provided with a water outlet pipe.

[0010] Preferably, the tube bundle assembly is provided in two sets, namely a first tube bundle assembly and a second tube bundle assembly. The first tube bundle assembly is generally cylindrical, and the second tube bundle assembly is generally cylindrical. The second tube bundle assembly is fitted onto the first tube bundle assembly.

[0011] Preferably, the first tube bundle assembly includes a first heat exchange tube, a first front baffle and a first rear baffle. The first front baffle and the first rear baffle are both circular. The two ends of the first heat exchange tube are respectively fixedly mounted on the first front baffle and the first rear baffle. A plurality of first fixing plates are provided in the middle of the first heat exchange tube.

[0012] Preferably, the second tube bundle assembly includes a second heat exchange tube, a second front baffle and a second rear baffle. The second front baffle and the second rear baffle are both annular and their inner diameters are equal to the outer diameters of the first front baffle and the first rear baffle. The second front baffle and the second rear baffle are connected by baffles. There are six baffles arranged evenly in a circle to form a cage.

[0013] Preferably, the first tube bundle assembly is inserted into the cage body, and the first front baffle and the second front baffle in the first tube bundle assembly are detachably connected by bolts.

[0014] Preferably, the two ends of the second heat exchange tube are fixedly mounted on the second front baffle and the second rear baffle, respectively, and a second fixing plate is provided in the middle of the second heat exchange tube.

[0015] Preferably, pull rings are provided on the outer end faces of both the first and second front baffles.

[0016] Compared with the prior art, this utility model provides a waste heat recovery device for tail gas of chemical plant, which has the following beneficial effects.

[0017] 1. This utility model, by setting up several tube bundle components and using a sleeve connection method to form a tube bundle, allows the tube bundle components to be removed one by one during disassembly, thereby distributing the weight of the tube bundle and making it easier to remove. This avoids the problem of the overall tube body being too heavy and inconvenient to remove, thus solving the problem of inconvenient disassembly of waste heat recovery tube bundles in the prior art.

[0018] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0021] Figure 3 This is a schematic diagram of the disassembled structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the tube bundle assembly in this utility model.

[0023] Figure 5 This is a schematic diagram showing the disassembled structure of the tube bundle assembly in this utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the first front baffle and the first rear baffle in this utility model.

[0025] Figure 7 This is a schematic diagram of the structure of the second front baffle and the second rear baffle in this utility model.

[0026] Figure 8 This is a cross-sectional structural diagram of the tube body in this utility model.

[0027] In the picture:

[0028] 1. Water inlet pipe; 2. Front end cap; 3. Pipe body; 4. Air inlet pipe; 5. Rear end cap; 6. Water outlet pipe; 7. Air outlet pipe; 8. First front baffle; 9. Second front baffle; 10. Second heat exchange tube; 11. Second fixing plate; 12. First rear baffle; 13. Second rear baffle; 14. First fixing plate; 15. Pull ring; 16. Baffle bar; 17. First heat exchange tube. Detailed Implementation

[0029] 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.

[0030] Reference Figure 1-8 A waste heat recovery device for tail gas of a chemical plant includes a pipe body 3, in which a plurality of tube bundle assemblies are arranged, and the tube bundle assemblies are connected in a sleeve. The front end cover 2 and the rear end cover 5 are detachably connected to the front and rear ends of the pipe body 3, respectively.

[0031] In a specific embodiment of this utility model, a whole tube bundle is composed of several tube bundle assemblies, which allows the tube bundle to be removed separately, avoiding the problem of difficulty in removing the tube bundle due to its overall weight. At the same time, this arrangement allows for multiple groups to work simultaneously when inspecting, maintaining, or replacing the heat exchange tubes after removal, as the tube bundle is divided into multiple groups, thus improving efficiency. For example, if the tube bundle is composed of two sets of tube bundle assemblies, two groups of workers can be assigned to inspect, maintain, or replace the tube bundle assemblies at the same time, thereby improving efficiency.

[0032] An exhaust pipe 7 is provided on the pipe body 3 near the front end cover 2, and an intake pipe 4 is provided on the pipe body 3 near the rear end cover 5. Through the intake pipe 4, the chemical exhaust gas can enter the pipe body 3 from the intake pipe 4 and then exit from the exhaust pipe 7.

[0033] A water inlet pipe 1 is provided on the front cover 2, and a water outlet pipe 6 is provided on the rear cover 5. Water can enter the front cover 2 through the water inlet pipe 1, then enter the tube bundle, then enter the rear cover 5, and finally be discharged from the water outlet pipe 6, thus completing the waste heat recovery and utilization and reducing the heat loss of the exhaust gas.

[0034] The tube bundle assembly consists of two sets: a first tube bundle assembly and a second tube bundle assembly. The first tube bundle assembly is approximately cylindrical, and the second tube bundle assembly is approximately cylindrical. The second tube bundle assembly is fitted onto the first tube bundle assembly. The shapes of the first and second tube bundle assemblies can be referenced. Figure 5 .

[0035] The first tube bundle assembly includes a first heat exchange tube 17, a first front baffle 8, and a first rear baffle 12. Both the first front baffle 8 and the first rear baffle 12 are circular. The two ends of the first heat exchange tube 17 are respectively fixed on the first front baffle 8 and the first rear baffle 12. A plurality of first fixing plates 14 are provided in the middle of the first heat exchange tube 17. Both the first front baffle 8 and the first rear baffle 12 are provided with through holes adapted to the first heat exchange tube 17. The front end of the first heat exchange tube 17 is fixed in the through hole on the first front baffle 8, and the rear end is fixed in the through hole on the first rear baffle 12. The first fixing plates 14 are also provided with through holes adapted to the first heat exchange tube 17, and the first fixing plates 14 are located in the middle of the first heat exchange tube 17.

[0036] The second tube bundle assembly includes a second heat exchange tube 10, a second front baffle 9, and a second rear baffle 13. Both the second front baffle 9 and the second rear baffle 13 are annular, with inner diameters equal to the outer diameters of the first front baffle 8 and the first rear baffle 12. The second front baffle 9 and the second rear baffle 13 are connected by six baffle rods 16, evenly arranged in a circle to form a cage. This cage is located in the middle of the second front baffle 9 and the second rear baffle 13. For a detailed structure, please refer to [reference needed]. Figure 7 .

[0037] The first tube bundle assembly is inserted into the cage, and the first front baffle 8 and the second front baffle 9 in the first tube bundle assembly are detachably connected by bolts. The cage can prevent the first tube bundle assembly from damaging the second heat exchange tube 10 when the first tube bundle assembly is inserted into the second tube bundle assembly.

[0038] The two ends of the second heat exchange tube 10 are respectively fixed on the second front baffle 9 and the second rear baffle 13. A second fixing plate 11 is provided in the middle of the second heat exchange tube 10. Both the second front baffle 9 and the second rear baffle 13 are provided with through holes adapted to the second heat exchange tube 10. The front end of the second heat exchange tube 10 is fixedly provided with the through hole on the second front baffle 9, and the rear end is fixedly provided with the through hole on the second rear baffle 13. The second fixing plate 11 is also provided with through holes adapted to the second heat exchange tube 10. The second fixing plate 11 is located in the middle of the second heat exchange tube 10.

[0039] Pull rings 15 are provided on the outer end faces of the first front baffle 8 and the second front baffle 9. The tube bundle assembly can be easily pulled out by the pull rings 15.

[0040] Installation process: First, remove the front cover 2. Then, insert the second tube bundle assembly from the front end of the tube body 3, with the second front baffle 9 located at the front end of the tube body 3 and the second rear baffle 13 abutting against the inner rear end wall of the tube body 3. Then, use bolts to fix the second front baffle 9 to the tube body 3. After the second tube bundle assembly is installed, install the first tube bundle assembly. Insert the first tube bundle assembly into the cage in the second tube bundle assembly, with the first rear baffle 12 abutting against the middle of the second rear baffle 13. Then, use bolts to fix the first front baffle 8 to the second front baffle 9. Finally, install the front cover 2 to the front end of the tube body 3.

[0041] Disassembly procedure: First, remove the front cover 2, then disconnect the connection between the first front baffle 8 and the second front baffle 9, then pull out the first tube bundle assembly. After pulling out the first tube bundle assembly, disconnect the connection between the second front baffle 9 and the tube body 3, then pull out the second tube bundle assembly, and complete the batch disassembly of the tube bundle.

[0042] Operating Procedure: When this device is in use, chemical exhaust gas enters the tube body 3 through the inlet pipe 4 and fills the tube body 3, and then exits through the outlet pipe 7. During this process, water can be used as a medium to realize the recovery and utilization of waste heat. Water enters the front cover 2 through the water inlet pipe 1, then enters the heat exchange tube in the tube bundle assembly, then flows to the rear cover 5, and then exits through the water outlet pipe 6. The water completes heat exchange when passing through the heat exchange tube, and the waste heat of the exhaust gas is used to heat the water to achieve the effect of waste heat recovery and utilization.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A waste heat recovery device for tail gas from a chemical plant, characterized in that, The tube (3) includes a tube body (3) and a number of tube bundle components are provided inside the tube body (3). The tube bundle components are connected in a sleeve. The front end cap (2) and the rear end cap (5) are detachably connected to the front and rear ends of the tube body (3).

2. The waste heat recovery device for chemical plant tail gas according to claim 1, characterized in that, An air outlet pipe (7) is provided on the pipe body (3) near the front end cover (2), and an air inlet pipe (4) is provided on the pipe body (3) near the rear end cover (5).

3. The waste heat recovery device for chemical plant tail gas according to claim 1, characterized in that, The front cover (2) is provided with a water inlet pipe (1), and the rear cover (5) is provided with a water outlet pipe (6).

4. The waste heat recovery device for chemical plant tail gas according to claim 1, characterized in that, The tube bundle assembly is provided in two sets, namely a first tube bundle assembly and a second tube bundle assembly. The first tube bundle assembly is generally cylindrical, and the second tube bundle assembly is generally cylindrical. The second tube bundle assembly is fitted onto the first tube bundle assembly.

5. A waste heat recovery device for tail gas from a chemical plant according to claim 4, characterized in that, The first tube bundle assembly includes a first heat exchange tube (17), a first front baffle (8) and a first rear baffle (12). The first front baffle (8) and the first rear baffle (12) are both circular. The two ends of the first heat exchange tube (17) are respectively fixed on the first front baffle (8) and the first rear baffle (12). A plurality of first fixing plates (14) are provided in the middle of the first heat exchange tube (17).

6. A waste heat recovery device for tail gas from a chemical plant according to claim 5, characterized in that, The second tube bundle assembly includes a second heat exchange tube (10), a second front baffle (9), and a second rear baffle (13). The second front baffle (9) and the second rear baffle (13) are both annular, and their inner diameters are equal to the outer diameters of the first front baffle (8) and the first rear baffle (12). The second front baffle (9) and the second rear baffle (13) are connected by baffles (16). There are six baffles (16) arranged evenly in a circle to form a cage.

7. A waste heat recovery device for chemical plant tail gas according to claim 6, characterized in that, The first tube bundle assembly is inserted into the cage body, and the first front baffle (8) and the second front baffle (9) in the first tube bundle assembly are detachably connected by bolts.

8. A waste heat recovery device for chemical plant tail gas according to claim 6, characterized in that, The two ends of the second heat exchange tube (10) are fixedly mounted on the second front baffle (9) and the second rear baffle (13) respectively, and a second fixing plate (11) is provided in the middle of the second heat exchange tube (10).

9. A waste heat recovery device for tail gas from a chemical plant according to claim 6, characterized in that, Pull rings (15) are provided on the outer end faces of the first front baffle (8) and the second front baffle (9).

Images