Phenylethanol recovery column condenser

Abstract

The utility model provides a phenylethanol recovery tower condenser, it has improved the condensation efficiency of gas phase phenylethanol, has reduced the occupied space of equipment. It includes: condensing cylinder, it horizontal arrangement, condensing cylinder includes first pipe box, front end pipe plate, cylinder, shell side baffle, second pipe box, rear end pipe plate, at least one liquid collecting bag, heat exchange component, it includes a plurality of heat exchange pipes, a plurality of fixed -distance tubes, a plurality of pull rod, a plurality of baffle, and a shell side baffle, first pipe box includes medium input cavity and medium output cavity, for the inflow and outflow of medium, the front, rear end pipe plate is set between cylinder and first pipe box, second pipe box passes through flange structure and is fixed, the front, rear end pipe plate is arranged with heat exchange pipe through -hole, the upper portion of cylinder is sequentially spaced with a plurality of feed ports along the length direction, the bottom length direction of cylinder is arranged with at least one lower convex liquid collecting bag, the bottom of liquid collecting bag is provided with liquid phase export.

Description

Technical Field

[0001] This utility model relates to the technical field of phenylethanol recovery, specifically to a phenylethanol recovery tower condenser. Background Technology

[0002] Phenylacetyl alcohol is in a high-temperature, low-pressure state in its gaseous phase, making it difficult to preserve. Therefore, it needs to be condensed and recovered. However, existing phenylethanol recovery towers directly pass the high-temperature, high-pressure phenylethanol through a relatively low-temperature medium for heat exchange. In actual heat exchange, multiple heat exchange modules are required, resulting in huge phenylethanol condensation equipment that occupies a large amount of factory space. Therefore, there is an urgent need to develop a condenser for the recovery of gaseous phenylethanol that has high condensation efficiency and occupies less space. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a condenser for a phenylethanol recovery tower, which improves the condensation efficiency of gaseous phenylethanol and reduces the space occupied by the equipment.

[0004] A condenser for a phenylethanol recovery tower, characterized in that it comprises: A condenser cylinder, arranged horizontally, includes a first tube box, a front tube sheet, a cylinder, a rear tube sheet, and a second tube box. At least one liquid collection bag; The heat exchange assembly includes several heat exchange tubes, several spacer tubes, several tie rods, several baffles, and a shell-side partition. The first tube box includes a medium input cavity and a medium output cavity for the inflow and outflow of the medium. The cylinder is connected to the first tube box and the second tube box by front and rear end tube sheets and fixed by a flange structure. The front and rear end tube sheets are arranged with heat exchange tube through holes. The upper part of the cylinder is arranged with several feed ports at intervals along the length direction. The bottom of the cylinder is arranged with at least one downward protruding liquid collection bag along the length direction. The bottom of the liquid collection bag is provided with a liquid phase outlet. The inner cavity of the cylinder is provided with several baffles arranged at intervals along the length direction. The baffles are provided with oblique mounting slots. The shell-side baffles are inserted into the oblique mounting slots of each set of baffles. The oblique angle of the shell-side baffles in the side view is 45°. The top of the shell-side baffles is located on one side of the feed inlet, which allows the phenylethanol falling along the feed inlet to travel along the flow direction of the shell-side baffles.

[0005] Its further features are: The number of liquid collection bags is two. Two downward-protruding liquid collection bags are arranged at intervals on both sides of the middle of the bottom length direction of the cylinder. The liquid collection bags are relatively deep to facilitate the storage and recovery of phenylethanol after condensation. The shell-side partition is inserted into the inclined mounting slot and then welded to the baffle plate, which ensures that the shell-side partition is in a stable and reliable position. After the shell-side partition is welded to the baffle, heat exchange tubes and other components are installed. After all components are installed, a short-circuit prevention sealing structure is installed on the upper part of the shell-side partition, corresponding to the position diagonally above the baffle. The short-circuit prevention sealing structure forms a seal between the two sides of the shell-side partition and the cylinder, preventing short circuits at this point. The length of each heat exchange tube extends through the areas of the front and rear tube sheets corresponding to the cylinder, ensuring sufficient heat exchange area within the cylinder. The upper part of the cylinder is provided with four feed ports evenly spaced along the length direction to ensure that phenylethanol can be evenly distributed after entering the shell and improve efficiency. Each of the feed inlets is equipped with an anti-erosion plate to prevent erosion of the heat exchange tubes.

[0006] With the above technical solution, the shell-side medium is α-phenylethanol, and the tube-side medium is hot water. The inlet temperature of the shell-side medium is higher than that of the tube-side medium. The shell-side medium exchanges heat through U-shaped heat exchange tubes, releasing heat and condensing, while the tube-side medium absorbs heat and rises in temperature. Through heat transfer between the hot and cold media, the condensation and recovery of α-phenylethanol is achieved. α-Phenylene ethanol enters the cylinder through multiple inlets. Due to the obliquely arranged shell-side baffles inside the cylinder, the fluid flow is optimized, the fluid path is extended, and the residence time of the fluid inside the cylinder is increased, thereby improving the heat exchange between the hot and cold fluids. Sufficient time for heat exchange enhances condensation efficiency. Furthermore, this structure alters the fluid flow direction, preventing a smooth flow across the shell and instead creating an angled scouring effect that increases turbulence. According to heat transfer principles, increased turbulence reduces the boundary layer thickness on the heat exchange tube surface, lowering thermal resistance and thus improving the heat transfer coefficient and efficiency. Additionally, the presence of a collection tray at the bottom of the shell facilitates the storage and recovery of α-phenylethanol after condensation, improving the condensation efficiency of gaseous phenylethanol and reducing the equipment's footprint. Attached Figure Description

[0007] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the assembly of the shell-side partition and baffle of this utility model; Figure 3 for Figure 2 A magnified view of part A; The names corresponding to the serial numbers in the diagram are as follows: 1. Feed inlet; 2. Liquid phase outlet; 3. Anti-impact plate; Condensing cylinder 10, first tube box 11, medium input cavity 111, medium output cavity 112, front tube sheet 12, cylinder 13, rear tube sheet 14, second tube box 15, liquid collection bag 20, heat exchange assembly 30, heat exchange tube 31, spacer tube 32, baffle 33, oblique mounting groove 331, shell side partition 40, and short-circuit protection sealing structure 50. Detailed Implementation

[0008] Phenylacetyl alcohol recovery tower condenser, see Figures 1-3 It includes a condenser shell 10, at least one liquid collection bag 20, a heat exchange assembly 30, and a shell-side partition 40; The condenser cylinder 10 is arranged horizontally and includes a first tube box 11, a front tube sheet 12, a cylinder 13, a rear tube sheet 14, and a second tube box 15. The heat exchange assembly 30 includes several heat exchange tubes 31, several spacer tubes 32, and several baffles 33; The first tube box 11 includes a medium input cavity 111 and a medium output cavity 112 for the inflow and outflow of the medium. A front tube plate 12 is provided between the opposing ends of the first tube box 11 and the cylinder 13 and is fixed by a flange structure. Heat exchange tube through holes are arranged on the front tube plate 12. Several feed ports 1 are arranged sequentially along the length direction on the upper part of the cylinder 13. At least one downward protruding liquid collection bag 20 is arranged along the length direction at the bottom of the cylinder 13. A liquid phase outlet 2 is provided at the bottom of the liquid collection bag 20. The inner cavity of the cylinder 13 has several baffles 33 arranged at intervals along the length direction. The baffles 33 have oblique mounting grooves 331. Shell side baffles 40 are inserted into the oblique mounting grooves 331 of each set of baffles 33. The oblique angle of the shell side baffles 40 in the side view is 45°. The top of the shell side baffles 40 is located on one side of the feed inlet 1, which allows the phenylethanol falling along the feed inlet 1 to travel along the flow direction of the shell side baffles 40.

[0009] In practice, there are two liquid collection bags 20. Two downward-protruding liquid collection bags 20 are arranged at intervals on both sides of the middle of the bottom length direction of the cylinder 13. The liquid collection bags 20 are relatively deep, which facilitates the storage and recovery of phenylethanol after condensation. After the shell-side partition plate 40 is inserted into the inclined mounting slot 331, the baffle plate 33 is welded to it, which ensures that the shell-side partition plate 40 is in a stable and reliable position. After the shell-side partition 40 is welded to the baffle 33, heat exchange tubes and other components are installed. After all components are installed, a short-circuit prevention sealing structure 50 is installed on the upper part of the shell-side partition 40 at a position diagonally above the baffle 33. The short-circuit prevention sealing structure 50 forms a seal between the two sides of the shell-side partition and the cylinder 13 to prevent short circuits. Each set of heat exchange tubes 31 passes through the area of ​​the front tube sheet 12 and the rear tube sheet 14 corresponding to the cylinder 13 in the length direction, which makes the heat exchange area inside the cylinder 13 sufficient. Four feed ports 1 are evenly spaced along the length of the upper part of the cylinder 13 to ensure that phenylethanol can be evenly distributed after entering the shell and improve efficiency. Each feed inlet 1 is equipped with an anti-impact plate 3 below it to prevent erosion of the heat exchange tube 31.

[0010] Its working principle is as follows: the shell-side medium is α-phenylethanol, and the tube-side medium is hot water. The inlet temperature of the shell-side medium is higher than that of the tube-side medium. The shell-side medium exchanges heat through U-shaped heat exchange tubes, releasing heat and condensing, while the tube-side medium absorbs heat and rises in temperature. Through the heat transfer between the hot and cold media, the condensation and recovery of α-phenylethanol are achieved. α-Phenylene alcohol enters the cylinder through multiple inlets. Due to the obliquely arranged shell-side baffles inside the cylinder, the fluid flow is optimized, the fluid path is extended, and the residence time of the fluid inside the cylinder is increased, thereby allowing for more thorough exchange between the hot and cold fluids. Sufficient time is allowed for heat exchange, improving the condensation effect. Furthermore, this structure can alter the fluid flow direction, preventing the fluid from flowing smoothly through the shell and instead creating an angled scouring effect, increasing the turbulence. According to heat transfer principles, increased turbulence reduces the boundary layer thickness on the heat exchange tube surface, lowering thermal resistance and thus improving the heat transfer coefficient and efficiency. Additionally, the presence of a collection bag at the bottom of the shell facilitates the storage and recovery of α-phenylethanol after condensation, improving the condensation efficiency of gaseous phenylethanol and reducing the space required for the equipment.

[0011] Furthermore, the angled shell-side baffles facilitate condensate drainage, prevent flow dead zones, and divide the shell side into different zones. The angled baffles allow the condensate in the shell side medium to flow more smoothly to the two liquid phase outlets at the bottom under gravity, preventing condensate accumulation within the shell side. In ordinary condensers, flow dead zones may exist in the shell side, leading to low heat exchange efficiency in those areas. The angled shell-side baffles can rationally guide and distribute the flow of the shell-side medium, reducing or even eliminating these dead zones, resulting in a more uniform medium distribution within the shell side, fully utilizing the condenser's heat exchange area, and improving overall heat exchange performance. The angled shell-side baffles can also divide the shell side into a preliminary condensation zone and a deep condensation zone, allowing the shell-side medium to gradually complete the condensation process in different areas, improving condensation efficiency and stability.

[0012] It will be apparent to those skilled in the art that this invention 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 essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0013] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A condenser for a phenylethanol recovery tower, characterized in that, It includes: A condenser cylinder, arranged horizontally, includes a first tube box, a front tube sheet, a cylinder, a rear tube sheet, and a second tube box. At least one liquid collection bag; The heat exchange assembly includes several heat exchange tubes, several spacer tubes, several tie rods, several baffles, and a shell-side partition. The first tube box includes a medium input cavity and a medium output cavity for the inflow and outflow of the medium. The cylinder is connected to the first tube box and the second tube box by front and rear end tube sheets and fixed by a flange structure. The front and rear end tube sheets are arranged with heat exchange tube through holes. The upper part of the cylinder is arranged with several feed ports at intervals along the length direction. The bottom of the cylinder is arranged with at least one downward protruding liquid collection bag along the length direction. The bottom of the liquid collection bag is provided with a liquid phase outlet. The inner cavity of the cylinder is provided with several baffles arranged at intervals along the length direction. The baffles are provided with oblique mounting slots. The shell-side baffles are inserted into the oblique mounting slots of each set of baffles. The oblique angle of the shell-side baffles in the side view is 45°. The top of the shell-side baffles is located on one side of the feed inlet, which allows the phenylethanol falling along the feed inlet to travel along the flow direction of the shell-side baffles.

2. The condenser for the phenylethanol recovery tower according to claim 1, characterized in that: The number of liquid collection bags is two, and two downward-protruding liquid collection bags are arranged at intervals on both sides of the middle of the bottom length direction of the cylinder.

3. The condenser for the phenylethanol recovery tower according to claim 1, characterized in that: The shell-side partition is inserted into the inclined mounting slot and then welded to the baffle plate.

4. The condenser for the phenylethanol recovery tower according to claim 3, characterized in that: After the shell-side partition is welded to the baffle plate and the heat exchange tube assembly is installed, a short-circuit prevention sealing structure is installed on its upper part at a position diagonally above the baffle plate. The short-circuit prevention sealing structure forms a seal between the two sides of the shell-side partition and the cylinder body, preventing short circuits at this location.

5. The condenser for the phenylethanol recovery tower according to claim 1, characterized in that: The length of each heat exchange tube extends through the area of ​​the front and rear tube sheets corresponding to the shell.

6. The condenser for the phenylethanol recovery tower according to claim 1, characterized in that: The upper part of the cylinder has four feed inlets evenly spaced along its length.

7. The condenser for the phenylethanol recovery tower according to claim 1 or 6, characterized in that: Each of the feed inlets is equipped with an anti-impact plate below it.

Images