A device for recovering waste heat from benzoyl chloride production

Abstract

The utility model discloses a kind of benzoyl chloride production waste heat recovery devices, comprising: recovery structure, the inner wall of the recovery structure is fixedly connected with heating structure;The utility model relates to the technical field of waste heat recovery.The recovery structure and heating structure, the heat conduction fin of the tube row outer wall substantially increases the waste heat contact area, and can quickly gather scattered waste heat;The spiral rod of the tube row inner wall changes high-temperature medium flow path, forms spiral flow and enhances the turbulence degree, effectively avoids "short circuit flow", prolongs medium and the heat exchange time of tube row, by adopting the split design of upper and lower cover plates, by the assembly mode of orientation positioning and bolt fixation, it is simple and convenient to operate, it is convenient to install, overhaul and replace heating structure.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically a waste heat recovery device for benzoyl chloride production. Background Technology

[0002] Benzoyl chloride, as an important organic synthesis intermediate, is widely used in pharmaceuticals, dyes, pesticides and other fields. Its production process generates a large amount of high-temperature waste heat. Therefore, the recovery and utilization of waste heat from benzoyl chloride production has become a key issue that urgently needs to be addressed in the industry.

[0003] For example, patent number CN223179329U discloses a waste heat recovery device, which includes a shell and two liquid storage tanks. The shell has an air inlet pipe and an air outlet pipe on two opposite sides for steam to enter and exit the inner cavity of the shell. The inner cavity is equipped with a heat absorption system, which includes a communication mechanism. Each liquid storage tank can be individually connected to the heat absorption system through the communication mechanism to form a closed circulating water circuit, so as to alternately supply circulating water to the heat absorption system.

[0004] Although the aforementioned patents have technical advantages in waste heat recovery, the structural design of the devices is unreasonable. Most recovery devices are integral structures, which are difficult to disassemble and assemble. When heat exchange components are corroded, scaled, or damaged, the disassembly process is complicated, increasing maintenance costs. It is difficult to balance sealing and convenience, and safety hazards such as waste heat leakage and heat transfer medium overflow are likely to occur, further limiting the promotion and application of waste heat recovery devices. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a waste heat recovery device for benzoyl chloride production, which solves the problem of the recovery device being an integral structure and difficult to disassemble and assemble.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A waste heat recovery device for benzoyl chloride production includes: a recovery structure, wherein a heating structure is fixedly connected to the inner wall of the recovery structure; the recovery structure includes an upper plate and a lower plate, with the lower plate positioned above the upper plate; mounting plates are fixedly connected to the outer walls of both the upper and lower plates; bolts are slidably connected to the inner walls of the mounting plates; sealing gaskets are fixedly connected to the outer walls of the bottom of the upper plate and the top of the lower plate; fixing blocks are fixedly connected to the inner walls of both the upper and lower plates; a guide block is fixedly connected to the outer wall of the bottom of the upper plate; and a guide groove is formed on the outer wall of the top of the lower plate.

[0007] Preferably, the upper and lower plates are fixedly connected by bolts on the mounting plate. The outer wall of the guide block is slidably connected to the inner wall of the guide groove. The sealing gasket at the bottom of the upper plate is in contact with the sealing gasket at the top of the lower plate. A recycling circulation pipe is fixedly connected to the inner wall at the top of the upper plate. The guide block at the bottom of the upper plate is aligned with the guide groove at the top of the lower plate and inserted. The sliding cooperation between the guide block and the guide groove achieves the positioning of the upper and lower plates, avoiding sealing failure or uneven heat exchange gap caused by assembly misalignment. After positioning, the upper and lower plates are fixed and locked by bolts on the inner wall of the mounting plate. At this time, the sealing gasket at the bottom of the upper plate and the sealing gasket at the top of the lower plate are tightly fitted to form a closed waste heat recovery cavity.

[0008] Preferably, the heating structure includes a tube array, with heat-conducting fins fixedly connected to the outer wall of the tube array and a spiral rod fixedly connected to the inner wall of the tube array.

[0009] Preferably, the outer wall of the pipe bank slides in contact with the inner wall of the fixing block, and the outer wall of the pipe bank contacts the outer wall of the sealing gasket. The heat-conducting fins fixed on the outer wall of the pipe bank increase the contact area between the pipe bank and the residual heat in the closed cavity, and quickly gather the dispersed residual heat to the pipe bank body. The spiral rod fixed on the inner wall of the pipe bank can change the flow path of the high-temperature medium, so that the medium forms a spiral flow in the pipe bank, prolonging the contact time between the medium and the inner wall of the pipe bank, and avoiding the residual heat from being discharged before sufficient exchange due to "short-circuit flow".

[0010] (III) Beneficial Effects This invention provides a waste heat recovery device for benzoyl chloride production. It has the following beneficial effects: (i) The heating structure significantly increases the contact area of ​​waste heat through the heat-conducting fins on the outer wall of the pipe bank, which can quickly gather and disperse waste heat; the spiral rod on the inner wall of the pipe bank changes the flow path of the high-temperature medium, forming a spiral flow and enhancing the degree of turbulence, effectively avoiding "short-circuit flow", prolonging the heat exchange time between the medium and the pipe bank, and ensuring that the waste heat is fully captured and absorbed.

[0011] (ii) The recycling structure adopts a split design of upper and lower plates and is assembled by guide positioning and bolt fixing. It is simple and convenient to operate and facilitates the installation, maintenance and replacement of the heating structure. The sliding contact design of the pipe row, fixing block and sealing gasket not only ensures the sealing effect, but also reduces the difficulty of disassembly and assembly. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the recycling structure of this utility model; Figure 4 This is a schematic diagram of the heating structure of this utility model.

[0013] In the diagram: 1. Recycling structure; 11. Upper plate; 12. Lower plate; 13. Mounting plate; 14. Bolt; 15. Sealing gasket; 16. Fixing block; 17. Guide block; 18. Guide groove; 2. Heating structure; 21. Pipeline; 22. Heat-conducting fins; 23. Spiral rod. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-4 This utility model provides a technical solution: a waste heat recovery device for benzoyl chloride production, comprising: a recovery structure 1, wherein a heating structure 2 is fixedly connected to the inner wall of the recovery structure 1; the recovery structure 1 includes an upper plate 11 and a lower plate 12, with the lower plate 12 positioned above the upper plate 11; mounting plates 13 are fixedly connected to the outer walls of both the upper plate 11 and the lower plate 12; bolts 14 are slidably connected to the inner walls of the mounting plates 13; sealing gaskets 15 are fixedly connected to the outer walls of the bottom of the upper plate 11 and the top of the lower plate 12; fixing blocks 16 are fixedly connected to the inner walls of both the upper plate 11 and the lower plate 12; a guide block 17 is fixedly connected to the outer wall of the bottom of the upper plate 11; and a guide groove 18 is provided on the outer wall of the top of the lower plate 12.

[0016] The upper plate 11 and the lower plate 12 are fixedly connected by bolts 14 on the mounting plate 13. The outer wall of the guide block 17 is slidably connected to the inner wall of the guide groove 18. The sealing gasket 15 at the bottom of the upper plate 11 is in contact with the sealing gasket 15 at the top of the lower plate 12. A recycling circulation pipe is fixedly connected to the inner wall at the top of the upper plate 11. The guide block 17 at the bottom of the upper plate 11 is aligned with the guide groove 18 at the top of the lower plate 12 and inserted. The upper plate 11 and the lower plate 12 are positioned by the sliding cooperation between the guide block 17 and the guide groove 18, so as to avoid sealing failure or uneven heat exchange gap caused by assembly misalignment. After positioning, the upper plate 11 and the lower plate 12 are fixed and locked by bolts 14 on the inner wall of the mounting plate 13. At this time, the sealing gasket 15 at the bottom of the upper plate 11 and the sealing gasket 15 at the top of the lower plate 12 are tightly fitted to form a closed waste heat recovery chamber.

[0017] The heating structure 2 includes a tube bank 21, with heat-conducting fins 22 fixedly connected to the outer wall of the tube bank 21, and a spiral rod 23 fixedly connected to the inner wall of the tube bank 21.

[0018] The outer wall of the tube bank 21 slides in contact with the inner wall of the fixing block 16, and the outer wall of the tube bank 21 contacts the outer wall of the sealing gasket 15. The heat-conducting fins 22 fixed on the outer wall of the tube bank 21 increase the contact area between the tube bank 21 and the residual heat in the closed cavity, and quickly gather the dispersed residual heat to the tube bank 21 body. The spiral rod 23 fixed on the inner wall of the tube bank 21 can change the flow path of the high-temperature medium, so that the medium forms a spiral flow in the tube bank 21, prolonging the contact time between the medium and the inner wall of the tube bank 21, and avoiding the residual heat from being discharged before sufficient exchange due to "short-circuit flow".

[0019] When in use, first complete the assembly of the recovery structure 1, and then install and fix the heating structure 2 inside the recovery structure 1 to facilitate the recovery of waste heat. First, the pipe bank 21 is placed on the fixing block 16 inside the lower plate 12. The guide block 17 at the bottom of the upper plate 11 is aligned with the guide groove 18 at the top of the lower plate 12 and inserted. The upper plate 11 and the lower plate 12 are positioned by the sliding engagement of the guide block 17 and the guide groove 18, avoiding sealing failure or uneven heat exchange gap caused by assembly misalignment. After positioning, the upper plate 11 and the lower plate 12 are fixed and locked by the bolts 14 on the inner wall of the mounting plate 13. At this time, the sealing gasket 15 at the bottom of the upper plate 11 and the sealing gasket 15 at the top of the lower plate 12 are tightly fitted to form a closed waste heat recovery cavity, preventing high-temperature waste heat leakage or heat transfer medium overflow. At the same time, the outer wall of the pipe bank 21 slides in contact with the inner wall of the fixing block 16 and is tightly fitted with the outer wall of the sealing gasket 15, further enhancing the cavity sealing performance. The fixing block 16 limits and fixes the pipe bank 21 to prevent it from shifting due to medium flow or temperature changes during operation. The high-temperature medium and waste heat generated during the benzoyl chloride production process can be directly introduced into the tube bank 21, allowing the high-temperature medium to fully contact the inner wall of the tube bank 21. The heat-conducting fins 22 fixed on the outer wall of the tube bank 21 increase the contact area between the tube bank 21 and the waste heat in the closed cavity, quickly converging the dispersed waste heat to the tube bank 21 body. The spiral rod 23 fixed on the inner wall of the tube bank 21 can change the flow path of the high-temperature medium, causing the medium to form a spiral flow in the tube bank 21, prolonging the contact time between the medium and the inner wall of the tube bank 21, avoiding the waste heat from being discharged before sufficient exchange due to "short-circuit flow", and at the same time enhancing the turbulence of the medium, further improving the heat transfer efficiency, and ensuring that the tube bank 21 efficiently absorbs waste heat and converts it into its own heat energy. Circulating water flows into the recycling pipe fixed on the inner wall of the top of the upper plate 11. The recycling pipe forms a heat exchange interface with the high-temperature pipe row 21 and heat-conducting fins 22 in the closed cavity. The heated heat transfer medium is driven by the circulation pump and transported to each waste heat utilization unit along the heat-insulated pipe.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] 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 waste heat recovery device for benzoyl chloride production, characterized in that, include: A recycling structure (1) is provided, wherein a heating structure (2) is fixedly connected to the inner wall of the recycling structure (1). The recycling structure (1) includes an upper plate (11) and a lower plate (12), with the lower plate (12) positioned above the upper plate (11). Mounting plates (13) are fixedly connected to the outer walls of the sides of both the upper plate (11) and the lower plate (12). Bolts (14) are slidably connected to the inner walls of the mounting plates (13). Sealing gaskets (15) are fixedly connected to the outer walls of the bottom of the upper plate (11) and the top of the lower plate (12). Fixing blocks (16) are fixedly connected to the inner walls of both the upper plate (11) and the lower plate (12). Guide blocks (17) are fixedly connected to the outer walls of the bottom of the upper plate (11). Guide grooves (18) are provided on the outer walls of the top of the lower plate (12).

2. The waste heat recovery device for benzoyl chloride production according to claim 1, characterized in that: The upper plate (11) and the lower plate (12) are fixedly connected by bolts (14) on the mounting plate (13). The outer wall of the guide block (17) is slidably connected to the inner wall of the guide groove (18). The sealing gasket (15) at the bottom of the upper plate (11) is in contact with the sealing gasket (15) at the top of the lower plate (12). A recycling pipe is fixedly connected to the inner wall at the top of the upper plate (11).

3. The waste heat recovery device for benzoyl chloride production according to claim 1, characterized in that: The heating structure (2) includes a tube bank (21), with heat-conducting fins (22) fixedly connected to the outer wall of the tube bank (21) and a spiral rod (23) fixedly connected to the inner wall of the tube bank (21).

4. The waste heat recovery device for benzoyl chloride production according to claim 3, characterized in that: The outer wall of the pipe bank (21) slides in contact with the inner wall of the fixing block (16), and the outer wall of the pipe bank (21) contacts the outer wall of the sealing gasket (15).

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