Waste heat recycling device for phenol production

Abstract

The utility model relates to the field of phenol production equipment, in particular to a waste heat recycling device for phenol production, which comprises a shell and a tube bundle arranged in the shell, the tube bundle comprises a plurality of heat exchange tubes, the two ends of each heat exchange tube are communicated with the outside of the shell, and a water inlet and a water outlet are formed in the shell. The shell is provided with a cleaning assembly, the cleaning assembly comprises an inner scraping plate and an outer scraping plate, the inner scraping plate is arranged in the heat exchange pipe and abuts against the inner side wall of the heat exchange pipe, the outer scraping plate is arranged outside the heat exchange pipe and abuts against the outer side wall of the heat exchange pipe, and the inner scraping plate and the outer scraping plate can move in the circumferential direction of the heat exchange pipe. The device has the effects of recovering heat in flue gas and achieving energy conservation and environmental protection.

Description

Technical Field

[0001] This application relates to the technical field of phenol production equipment, and particularly to a waste heat recovery and utilization device for phenol production. Background Art

[0002] Phenol is a common chemical raw material, which is widely used in developers, preservatives, insecticides, fungicides, dyes, and medicines. After phenol is prepared, it needs to be purified to obtain phenol that can be used.

[0003] Usually, phenol is purified by heating and distillation, and then pressure separation. During the distillation process, the boiler generates flue gas containing a large amount of heat. The direct discharge of this flue gas into the air causes environmental pollution on the one hand and energy waste on the other hand. Usually, workers will set up a tail gas treatment device at the smoke outlet of the boiler to recover the flue gas. For example, a flue gas recovery and utilization device disclosed in the patent document with the publication number CN221287395U. It mainly includes an SCR denitration reactor and a CFB high-efficiency desulfurizer, which are arranged in sequence to treat the flue gas. After the flue gas is treated, it reacts with the phenol acetophenone azeotrope to generate sodium carbonate required by the raw materials, realizing carbon cycle.

[0004] In the related art, the recovery and utilization of harmful substances in the flue gas have been realized, but the heat in the flue gas is still dissipated into the air. Therefore, the tail gas treatment device in the related art needs to be further improved. Utility Model Content

[0005] In order to facilitate the recovery of the heat in the flue gas during the phenol production process, this application provides a waste heat recovery and utilization device for phenol production.

[0006] A waste heat recovery and utilization device for phenol production provided by this application adopts the following technical solution:

[0007] A waste heat recovery and utilization device for phenol production includes a shell and a tube bundle arranged inside the shell. The tube bundle includes a plurality of heat exchange tubes. The two ends of the heat exchange tubes are communicated with the outside of the shell. The shell is provided with a water inlet and a water outlet. The shell is provided with a cleaning component. The cleaning component includes an inner scraper arranged inside the heat exchange tube and abutted against the inner side wall of the heat exchange tube, and an outer scraper arranged outside the heat exchange tube and abutted against the outer side wall of the heat exchange tube. Both the inner scraper and the outer scraper can move along the circumferential direction of the heat exchange tube.

[0008] By adopting the above technical solution, during the production process of phenol, the outer shell is fixed at the smoke outlet of the phenol production equipment, so that the inside of the heat exchange tube is communicated with the smoke outlet. At this time, the flue gas can pass through the heat exchange tube and be discharged from the other end of the heat exchange tube. Domestic water is filled into the outer shell through the water inlet, and heat exchange occurs between the flue gas and the domestic water through the heat exchange tube during the process of the flue gas passing through the heat exchange tube, so as to realize the recovery and utilization of the heat in the flue gas, achieving the effect of environmental protection and energy conservation. Moreover, the inner scraper and the outer scraper can clean the dirt on the inner side wall and the outer side wall of the heat exchange tube to ensure the heat exchange effect.

[0009] Optionally, the heat exchange tube is a circular tube, and the inner scraper is a spiral plate-like structure, and its axis coincides with the axis of the heat exchange tube.

[0010] By adopting the above technical solution, the inner scraper is set as a spiral plate, so that the soot on the inner side wall of the heat exchange tube can be pushed to one end of the heat exchange tube by the inner scraper after being scraped off, facilitating the discharge of the soot.

[0011] Optionally, the cleaning assembly further includes a rotating ring, the rotating ring is arranged corresponding to the heat exchange tube, the rotating ring is rotatably arranged on the outer shell, and one ends of the inner scraper and the outer scraper close to the rotating ring are both fixed on the rotating ring, and rotating the rotating ring can drive the inner scraper and the outer scraper to rotate.

[0012] By adopting the above technical solution, the rotating ring drives the inner scraper and the outer scraper to rotate synchronously, facilitating the cleaning of the inner side wall and the outer side wall of the heat exchange tube.

[0013] Optionally, a plurality of the outer scrapers are evenly arranged along the circumferential direction of the heat exchange tube.

[0014] By adopting the above technical solution, the plurality of outer scrapers are evenly arranged, so that the resistance received by the rotating tube is uniform, facilitating the rotation of the rotating ring, and at the same time improving the cleaning effect on the heat exchange tube.

[0015] Optionally, a driving assembly is arranged on the outer shell, the driving assembly includes a plurality of driven gears arranged corresponding to the rotating ring, and further includes a driving ring provided with tooth grooves that meshes with the plurality of driven gears at the same time.

[0016] By adopting the above technical solution, the driving ring drives the plurality of driven gears to rotate, and further drives the plurality of rotating rings to rotate synchronously.

[0017] Optionally, an arc surface that fits the outer side wall of the heat exchange tube is arranged on the side wall of the outer scraper close to the heat exchange tube.

[0018] By adopting the above technical solution, the contact area between the outer scraper and the outer side wall of the heat exchange tube is increased through the arc surface. On the one hand, the stability of the outer scraper during rotation can be improved, and on the other hand, it is convenient for the outer scraper to clean the water scale on the outer side wall of the heat exchange tube. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0020] Figure 2 It is a schematic diagram of the structure of the cleaning component of an embodiment of the present application.

[0021] Figure 3 It is a schematic diagram of the structure of the driving component of an embodiment of the present application.

[0022] Reference numerals: 1, housing; 11, water inlet; 12, water outlet; 2, tube bundle; 21, heat exchange tube; 22, intake end; 23, outlet end; 3, cleaning component; 31, outer scraper; 32, inner scraper; 33, arc surface; 34, rotating ring; 4, driving component; 41, driven gear; 42, driving ring; 43, linkage gear. Detailed implementation manners

[0023] The following will further describe the present application in detail Figures 1-3 with reference to the attached drawings.

[0024] An embodiment of the present application discloses a waste heat recovery and utilization device for phenol production.

[0025] Referring to Figure 1 and Figure 2 , a waste heat recovery and utilization device for phenol production includes a housing 1 and a tube bundle 2. The interior of the housing 1 is hollow, and the tube bundle 2 is arranged inside the housing 1. The tube bundle 2 includes a plurality of heat exchange tubes 21, and the plurality of heat exchange tubes 21 are arranged in parallel at intervals. A water inlet 11 and a water outlet 12 are provided on the housing 1. The two ends of the heat exchange tube 21 are defined as an intake end 22 and an outlet end 23 respectively. During the use of the waste heat recovery device, the housing 1 is fixed at the smoke outlet of the phenol preparation equipment, and the intake ends 22 of the plurality of heat exchange tubes 21 are all connected to the smoke outlet, and the flue gas can pass through the heat exchange tubes 21 and be discharged from the outlet end 23 of the heat exchange tubes 21. The outlet end 23 of the heat exchange tube 21 is connected to a tail gas treatment device to treat harmful substances in the tail gas. The water inlet 11 is used to inject domestic water into the interior of the housing 1, and the water outlet 12 is used to discharge domestic water. When the flue gas passes through the heat exchange tubes 21, it exchanges heat with the domestic water in the housing, realizing the heating of the domestic water, and thus realizing the recovery and utilization of the heat in the flue gas.

[0026] Referring to Figure 1 and Figure 2The heat exchange tube 21 is provided with a cleaning assembly 3, which includes an inner scraper 32 and an outer scraper 31. The inner scraper 32 is arranged inside the heat exchange tube 21, and the outer scraper 31 is arranged outside the heat exchange tube 21. The inner scraper 32 abuts against the inner wall of the heat exchange tube 21. The inner scraper 32 is rotated to clean the scale on the inner wall of the heat exchange tube 21. The outer scraper 31 abuts against the outer wall of the heat exchange tube 21. The outer scraper 31 is rotated to clean the soot adsorbed on the outer wall of the heat exchange tube 21, so as to reduce the effect of the heat exchange of the heat exchange tube 21 affected by the scale or soot, and ensure the efficiency of heat recovery in the flue gas.

[0027] Reference Figure 1 and Figure 2 , the heat exchange tube 21 is a circular tube, and the inner scraper 32 extends along a spiral trajectory line whose axis coincides with the axis of the heat exchange tube 21 in the length direction. By rotating the inner scraper 32, the soot can be pushed to one end of the heat exchange tube 21 by the inner scraper 32. The outer scraper 31 is a rectangular plate whose length direction is parallel to the heat exchange tube 21. The side of the rectangular plate close to the heat exchange tube 21 is provided with an arc surface 33 that fits with the outer wall of the heat exchange tube 21 to improve the cleaning effect of the scale on the outer wall of the heat exchange tube 21. Multiple outer scrapers 31 are evenly spaced along the circumference of the heat exchange tube 21, and two are provided in this embodiment.

[0028] Reference Figure 1 and Figure 2 The cleaning assembly 3 also includes a rotating ring 34, which is rotatably arranged on the outer shell 1 and corresponds to the end of the heat exchange tube 21. The end of the heat exchange tube 21 close to the rotating ring 34 is rotatably connected to the rotating ring 34 and communicates with the inside of the rotating ring 34, so that the flue gas passes through the heat exchange tube 21. The end of the heat exchange tube 21 away from the rotating ring 34 is welded to the outer shell 1. The ends of the inner scraper 32 and the outer scraper 31 close to the rotating ring 34 are welded to the rotating ring 34. Rotating the rotating ring 34 can drive the inner scraper 32 and the outer scraper 31 to rotate synchronously, so that the staff can clean the inner and outer walls of the heat exchange tube 21 synchronously.

[0029] Reference Figure 2 and Figure 3 In this embodiment, the multiple heat exchange tubes 21 are divided into multiple groups, each group includes multiple heat exchange tubes 21, and the multiple heat exchange tubes 21 in each group are evenly spaced along the circular path, and the adjacent groups of heat exchange tubes 21 are spaced apart. In this embodiment, three groups are set, and the three groups of heat exchange tubes 21 are defined as the first tube group, the second tube group, and the third tube group. The trajectory line of the arrangement of the multiple heat exchange tubes 21 in the first tube group is located outside the trajectory line of the arrangement of the heat exchange tubes 21 in the second tube group. In this embodiment, there is one heat exchange tube 21 in the third tube group, so one heat exchange tube 21 in the third tube group coincides with the center of the trajectory line of the arrangement of the second tube group.

[0030] Reference Figure 2 andFigure 3 A driving assembly 4 for driving the rotation of the rotating ring 34 is provided on the outer shell 1. The driving assembly 4 includes driven gears 41 corresponding to a plurality of heat exchange tubes 21 and a driving ring 42. In this embodiment, the driving ring 42 is arranged between the first tube group and the second tube group, and tooth grooves engaged with gears are formed on the inner side wall and the outer side wall of the driving ring 42. A linkage gear 43 is arranged between the driven gear 41 on the third tube group and the driving ring 42. The linkage gear 43 is engaged with the driving ring 42 and the driven gear 41 on the heat exchange tube 21 in the third tube group. Rotating the linkage gear 43 can drive the driving ring 42 and the driven gear 41 on the third tube group to rotate, so as to realize the synchronous rotation of a plurality of rotating rings 34. In this embodiment, the linkage gear 43 is directly driven by a servo motor to realize the automatic cleaning of a plurality of heat exchange tubes 21.

[0031] The implementation principle of a waste heat recovery and utilization device for phenol production in an embodiment of the present application is as follows: The flue gas passes through the inside of the heat exchange tube 21 and is discharged from the air outlet of the heat exchange tube 21. During the flow of the flue gas, heat exchange is carried out between the heat exchange tube 21 and the domestic water in the outer shell 1, so as to realize the recovery of the heat in the flue gas and achieve the effect of energy conservation and environmental protection.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A waste heat recovery and utilization device for phenol production, characterized in that: It includes a housing (1) and a tube bundle (2) arranged inside the housing (1). The tube bundle (2) includes a plurality of heat exchange tubes (21). Both ends of the heat exchange tubes (21) communicate with the outside of the housing (1). An inlet (11) and an outlet (12) are provided on the housing (1). A cleaning assembly (3) is provided on the housing (1). The cleaning assembly (3) includes an inner scraper (32) arranged inside the heat exchange tube (21) and abutting against the inner side wall of the heat exchange tube (21), and an outer scraper (31) arranged outside the heat exchange tube (21) and abutting against the outer side wall of the heat exchange tube (21). Both the inner scraper (32) and the outer scraper (31) can move circumferentially along the heat exchange tube (21).

2. The waste heat recovery and utilization device for phenol production according to claim 1, wherein: The heat exchange tube (21) is a circular tube. The inner scraper (32) is a spiral plate-like structure, and its axis coincides with the axis of the heat exchange tube (21).

3. The waste heat recovery and utilization device for phenol production according to claim 2, characterized in that: The cleaning assembly (3) further includes a rotating ring (34). The rotating ring (34) is arranged corresponding to the heat exchange tube (21). The rotating ring (34) is rotatably arranged on the housing (1). One end of both the inner scraper (32) and the outer scraper (31) close to the rotating ring (34) is fixed on the rotating ring (34). Rotating the rotating ring (34) can drive the inner scraper (32) and the outer scraper (31) to rotate.

4. The waste heat recovery and utilization device for phenol production according to claim 2 or 3, characterized in that: A plurality of the outer scrapers (31) are evenly arranged along the circumference of the heat exchange tube (21).

5. The waste heat recovery and utilization device for phenol production according to claim 3, wherein: A driving assembly (4) is provided on the housing (1). The driving assembly (4) includes a plurality of driven gears (41) arranged corresponding to the rotating ring (34), and further includes a driving ring (42) provided with tooth grooves and meshing with the plurality of driven gears (41) simultaneously.

6. The waste heat recovery and utilization device for phenol production according to claim 5, wherein: An arc surface (33) that fits the outer side wall of the heat exchange tube (21) is provided on the side wall of the outer scraper (31) close to the heat exchange tube (21).

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