Crude phenol top condenser

Abstract

The present invention provides a crude phenol tower top condenser, which has several top inlets arranged in parallel in the condensing chamber and several bottom outlets arranged at the corresponding bottom, so that the condensing capacity is large and meets the industrial production needs; and the cooling capacity of the heat exchange tubes at the bottom of the condensing chamber is greater than the cooling capacity of the upper heat exchange tubes, ensuring the continuous condensation of the crude phenol during the falling process in the height direction, so that the utilization rate of the cooling capacity is high. It includes a horizontally arranged cylindrical shell, and the first connecting flange and the second connecting flange are respectively arranged at both ends of the length direction of the shell. The first connecting flange is covered with a fixed tube sheet, and the outer end cover of the fixed tube sheet is equipped with a tube box, which is fixedly installed at one end of the length direction of the shell, and the outer end cover of the tube box is equipped with a flat head, and the second connecting flange is fixedly connected to an outer head cover, and the outer head cover is installed at the other end of the length direction of the shell.

Description

Technical Field

[0001] The invention relates to the technical field of crude phenol treatment, in particular to a crude phenol tower top condenser. Background Art

[0002] After the existing crude phenol is produced, it needs to be condensed in a tower top condenser for subsequent treatment. The existing tower top condenser has a built-in condensation chamber, in which a plurality of heat exchange tubes arranged along the length of the chamber are arranged. A plurality of horizontally arranged baffles need to be arranged in the condensation chamber, which makes the arrangement structure of the condensation chamber complicated. One end of the heat exchange tube is the medium inlet, and the other end of the heat exchange tube is the medium outlet. In the actual process, since the temperatures of the plurality of heat exchange tubes from top to bottom are almost the same, the high-temperature crude phenol is condensed in the upper layer of the chamber, and the condensation effect in the lower layer is relatively poor. It is necessary to reduce the temperature of the medium in the heat exchange tube, which leads to a waste of cooling capacity in the entire heat exchange process. In addition, the existing tower top condensers all have a single inlet on the top and an outlet on the other side at the bottom, and the condensation capacity is relatively small and cannot meet the needs of industrial production. Summary of the invention

[0003] In view of the above problems, the present invention provides a crude phenol tower top condenser, which has a plurality of top inlets arranged in parallel in the condensing chamber and a plurality of bottom outlets arranged at the corresponding bottom, so that the condensation capacity is large and meets the industrial production needs; and the cooling capacity of the heat exchange tubes at the bottom of the condensing chamber is greater than the cooling capacity of the upper heat exchange tubes, ensuring the continuous condensation of the crude phenol during the falling process in the height direction, so that the utilization rate of the cooling capacity is high.

[0004] A crude phenol tower top condenser, characterized in that it comprises a horizontally arranged cylindrical shell, wherein a first connecting flange and a second connecting flange are respectively provided at both ends of the shell in the length direction, the first connecting flange is covered with a fixed tube sheet, the outer end cover of the fixed tube sheet is provided with a tube box, the tube box is fixedly mounted at one end of the shell in the length direction, the outer end cover of the tube box is provided with a flat head, the second connecting flange is fixedly connected with an outer head cover, the outer head cover is mounted at the other end of the shell in the length direction, the upper surface of the shell is arranged with N feed pipe openings along its length direction, wherein N is a natural number greater than or equal to 2, the lower surface of the shell is arranged with N discharge pipe openings along its length direction, each discharge pipe opening is arranged directly below the corresponding feed pipe opening, the middle section of the lower surface of the shell is provided with at least one fixed saddle and one movable saddle, A horizontal partition is arranged in the inner cavity formed by the tube box and the fixed tube sheet, and the horizontal partition divides the inner cavity of the tube box into a lower water inlet cavity and an upper water outlet cavity. A sealed transition cavity is arranged in the cavity of the outer head cover, and the sealed transition cavity is not connected with the cavity composed of the shell and the outer head cover. The sealed transition cavity is formed by a hook ring flange, a floating tube sheet and a floating head cover. The floating tube sheet is installed with a positioning plug between the opposite end surfaces of the connecting flange of the hook ring flange facing the floating head cover, and the connecting flanges of the hook ring flange and the floating head cover are fastened and connected by bolts. A plurality of straight heat exchange tubes are arranged between the fixed tube sheet and the floating tube sheet, and one end of each of the straight heat exchange tubes passes through the fixed tube sheet and then connects to the inner cavity of the tube box, and the other end of each of the straight heat exchange tubes passes through the floating tube sheet and then connects to the sealed transition cavity.

[0005] It is further characterized by:

[0006] A first baffle is also fixedly provided on the inner ring wall of the second connecting flange, and a second baffle arranged vertically is provided in the area directly below each of the feed pipe openings, and each of the second baffles is penetrated by a straight heat exchange tube in the thickness direction and is installed inside the cavity of the shell, and both ends of the second baffle in the height direction are spaced from the corresponding inner wall of the shell, and a horizontal anti-collision baffle is fixedly connected to the top of the second baffle, and the surface area of ​​the anti-collision baffle blocks the area directly below the feed pipe opening;

[0007] A third baffle is arranged in the inner cavity of the shell between the adjacent feed pipe ports, and the third baffle is arranged outside the surface area of ​​the anti-collision baffle. A straight heat exchange tube runs through the thickness direction of each third baffle, and is installed inside the cavity of the shell. Both ends of the third baffle in the height direction are spaced from the corresponding inner wall of the shell;

[0008] Each of the second baffles is respectively arranged on the central plane directly below the feed pipe opening, and the second baffle is arranged perpendicular to the straight heat exchange tube;

[0009] Corresponding distance tubes are arranged in the surface area between the fixed tube plate and the second baffle plate close to the fixed tube plate, between the third baffle plate and the second baffle plate, and between the second baffle plate and the first baffle plate, and the distance tubes ensure that the baffle plate is firmly and reliably positioned;

[0010] The straight heat exchange tube passes through the second baffle, the third baffle, and the first baffle at corresponding positions;

[0011] The straight heat exchange tube is arranged in the middle area of ​​the shell inner cavity in the height direction to ensure high efficiency of condensation;

[0012] When the straight heat exchange tubes are arranged only in the middle region of the inner cavity of the shell in the height direction, an anti-vibration plate is provided inside the inner cavity of the shell to reduce vibration;

[0013] Lifting ears are provided on both sides of the top of the flat head to facilitate the transportation of the equipment;

[0014] Preferably, the upper surface of the shell is provided with four feed pipe openings along its length direction, and the lower surface of the shell is provided with four discharge pipe openings along its length direction, and the spacing distances between adjacent feed pipe openings of the shell are equal to ensure a reasonable layout.

[0015] The upper and lower ends of the outer cover are respectively provided with vents;

[0016] The tube box is provided with a first flange at a position corresponding to the fixed tube sheet, the fixed tube sheet is provided between the first flange and the first connecting flange, both end surfaces of the fixed tube sheet are respectively surrounded by gaskets and arranged closely against the corresponding end surfaces of the first flange and the first connecting flange, and the first flange and the first connecting flange are fastened and connected by bolts;

[0017] A second flange is provided at a position of the outer head cover facing the second connecting flange, and the second flange is fixedly connected to the second connecting flange by bolts.

[0018] After adopting the above technical scheme, the crude phenol after production enters the surface of the upper linear heat exchanger through the feed pipe port, and then passes through the surface of the lower linear heat exchanger. Since the lower water inlet chamber is connected to the sealed transition chamber through the lower linear heat exchanger, the water that has undergone partial heat exchange in the sealed transition chamber flows into the upper water outlet chamber again through the upper linear heat exchanger and then flows out. The cooling capacity of the heat exchange tube at the bottom of the condensation chamber is greater than that of the upper heat exchange tube, ensuring the continuous condensation of the crude phenol during the falling process in the height direction, so that the utilization rate of the cooling capacity is high; and a plurality of top inlets are arranged in parallel in the condensation chamber, and a plurality of bottom outlets are arranged at the corresponding bottom, so that the condensation capacity is large and meets the needs of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the main view structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the arrangement structure of the straight heat exchange tubes of the fixed tube sheet of the present invention;

[0021] The names corresponding to the serial numbers in the figure are as follows:

[0022] Shell 1, first connecting flange 2, second connecting flange 3, fixed tube sheet 4, tube box 5, flat head 6, outer head cover 7, inlet pipe opening 8, outlet pipe opening 9, fixed saddle 10, movable saddle 11, horizontal partition 12, lower water inlet chamber 13, upper water outlet chamber 14, sealed transition chamber 15, hook ring flange 16, floating tube sheet 17, floating head cover 18, straight heat exchange tube 19, first baffle 20, second baffle 21, impact baffle 22, third baffle 23, distance pipe 24, lifting ear 25, vent 26, first flange 27, second flange 28, insulation layer 29. DETAILED DESCRIPTION

[0023] Crude phenol overhead condenser, see Figure 1 , Figure 2:It includes a horizontally arranged cylindrical shell 1, and a first connecting flange 2 and a second connecting flange 3 are respectively arranged at both ends of the shell 1 in the length direction. The upper cover of the first connecting flange 2 is provided with a fixed tube sheet 4, and the outer end cover of the fixed tube sheet 4 is provided with a pipe box 5, which is fixed to one end of the shell 1 in the length direction, and the outer end cover of the pipe box 5 is provided with a flat head 6. The second connecting flange 3 is fixedly connected to an outer head cover 7, and the outer head cover 7 is covered on the other end of the shell 1 in the length direction. N inlet pipe openings 8 are arranged on the upper surface of the shell 1 along its length direction, wherein N is a natural number greater than or equal to 2, and N outlet pipe openings 9 are arranged on the lower surface of the shell 1 along its length direction, and each outlet pipe opening 9 is arranged directly below the corresponding inlet pipe opening 8. At least one fixed saddle 10 and one movable saddle 11 are provided in the middle section of the lower surface of the shell 1. The inner portion formed by the pipe box 5 and the fixed tube sheet 4 A horizontal partition 12 is arranged in the cavity, and the horizontal partition 12 divides the inner cavity of the tube box 5 into a lower water inlet cavity 13 and an upper water outlet cavity 14. A sealed transition cavity 15 is arranged in the cavity of the outer head cover 7. The sealed transition cavity 15 is not connected to the cavity composed of the shell 1 and the outer head cover 7. The sealed transition cavity 15 is formed by a hook ring flange 16, a floating tube sheet 17, and a floating head cover 18. The floating tube sheet 17 is installed on the positioning plug between the opposite end surfaces of the connecting flange of the hook ring flange 16 facing the floating head cover 18. The connecting flanges of the hook ring flange 16 and the floating head cover 18 are fastened and connected by bolts. A plurality of straight heat exchange tubes 19 are arranged between the fixed tube sheet 4 and the floating tube sheet 17. One end of each straight heat exchange tube 19 passes through the fixed tube sheet 4 and then connects to the inner cavity of the tube box 5. The other end of each straight heat exchange tube 19 passes through the floating tube sheet 17 and then connects to the sealed transition cavity 15.

[0024] A first baffle plate 20 is also fixedly provided on the inner ring wall of the second connecting flange 3, and a second baffle plate 21 arranged vertically is provided in the area directly below each feed pipe opening 8, and a straight heat exchange tube 19 is penetrated in the thickness direction of each second baffle plate 21, and is installed inside the cavity of the shell 1, and both ends of the second baffle plate 21 in the height direction are spaced from the corresponding inner wall of the shell 1, and a horizontal anti-collision baffle plate 22 is fixedly connected to the top of the second baffle plate 21, and the surface area of ​​the anti-collision baffle plate 22 blocks the area directly below the feed pipe opening 8;

[0025] A third baffle plate 23 is arranged in the inner cavity of the shell between adjacent feed pipe ports 8. The third baffle plate 23 is arranged outside the surface area of ​​the anti-collision baffle plate 22. A straight heat exchange tube 19 runs through the thickness direction of each third baffle plate 23 and is installed inside the cavity of the shell 1. Both ends of the third baffle plate 23 in the height direction are spaced apart from the corresponding inner walls of the shell 1.

[0026] Each second baffle plate 21 is respectively arranged at the center plane directly below the feed pipe opening 8, and the second baffle plate 21 is arranged perpendicular to the straight heat exchange tube 19;

[0027] Corresponding distance tubes 24 are arranged in the surface area between the fixed tube sheet 4 and the second baffle 21 close to the fixed tube sheet 4, between the third baffle 23 and the second baffle 21, and between the second baffle 21 and the first baffle 20, and the distance tubes 24 ensure that the baffle position is stable and reliable;

[0028] The straight heat exchange tube 19 passes through the second baffle 21, the third baffle 23, and the first baffle 20 at corresponding positions;

[0029] Lifting ears 25 are provided at both sides of the top of the flat head 6 to facilitate the transportation of the equipment.

[0030] In a specific embodiment, four large-diameter feed pipe openings 8 are arranged on the upper surface of the shell 1 along its length direction, and four large-diameter discharge pipe openings 9 are arranged on the lower surface of the shell 1 along its length direction. The spacing distances of the shells of adjacent feed pipe openings 8 are equal to ensure a reasonable arrangement.

[0031] The straight heat exchange tube 19 is arranged in the middle area of ​​the inner cavity of the shell 1 in the height direction to ensure the high efficiency of condensation;

[0032] When the straight heat exchange tube 19 is arranged only in the middle area of ​​the height direction of the inner cavity of the shell, in order to reduce vibration, an anti-vibration plate is set inside the inner cavity of the shell (not shown in the figure, and can be reasonably arranged according to actual conditions);

[0033] The upper and lower ends of the outer cover 7 are respectively provided with venting ports 26;

[0034] The tube box 5 is provided with a first flange 27 at a position corresponding to the fixed tube sheet 4, and the fixed tube sheet 4 is provided between the first flange 27 and the first connecting flange 2. The two end surfaces of the fixed tube sheet 4 are respectively arranged with gaskets and are closely attached to the corresponding end surfaces of the first flange 27 and the first connecting flange 2. The first flange 27 and the first connecting flange 2 are fastened and connected by bolts.

[0035] A second flange 28 is provided at a position of the outer head cover 7 facing the second connecting flange 3, and the second flange 28 is fixedly connected to the second connecting flange 3 by bolts;

[0036] The outer surfaces of the shell 1 , the pipe box 5 , and the outer head cover 7 are all provided with a heat-insulating layer 29 .

[0037] Its working principle is as follows: the crude phenol after production passes through the inlet pipe port and then diffuses outward after passing through the anti-impact baffle and is blocked by the third baffle plate on the corresponding side, so that the liquid in the corresponding area enters the surface of the upper linear heat exchanger of the corresponding area, and then passes through the surface of the lower linear heat exchanger, and then flows out through the outlet pipe port. Since the lower water inlet chamber is connected to the sealed transition chamber through the lower linear heat exchanger, the water in the sealed transition chamber that has undergone partial heat exchange flows into the upper water outlet chamber again through the upper linear heat exchanger and then flows out. The cooling capacity of the heat exchange tube at the bottom of the condensation chamber is greater than that of the upper heat exchange tube, which ensures the continuous condensation of the crude phenol during the falling process in the height direction, so that the utilization rate of the cooling capacity is high; and a plurality of top inlets are arranged in parallel in the condensation chamber, and a plurality of bottom outlets are arranged at the corresponding bottom, so that the condensation capacity is large and meets the needs of industrial production.

[0038] In specific implementation, crude phenol can also be a corresponding gas-liquid mixture medium, and the heat-conducting medium in the lower water inlet cavity is cooling water or other cooling medium.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A crude phenol overhead condenser, characterized in that: It includes a horizontally arranged cylindrical shell, with a first connecting flange and a second connecting flange respectively arranged at both ends of the shell in the length direction, the first connecting flange is covered with a fixed tube sheet, the outer end cover of the fixed tube sheet is provided with a pipe box, the pipe box is fixedly installed at one end of the shell in the length direction, the outer end cover of the pipe box is provided with a flat head, the second connecting flange is fixedly connected to an outer head cover, the outer head cover is installed at the other end of the shell in the length direction, the upper surface of the shell is arranged with N inlet pipe openings along its length direction, wherein N is a natural number greater than or equal to 2, the lower surface of the shell is arranged with N outlet pipe openings along its length direction, each outlet pipe opening is arranged directly below the corresponding inlet pipe opening, at least one fixed saddle and one movable saddle are provided in the middle section of the lower surface of the shell, the pipe box and the fixed A horizontal partition is arranged in the inner cavity formed by the fixed tube sheet, and the horizontal partition divides the inner cavity of the tube box into a lower water inlet cavity and an upper water outlet cavity. A sealed transition cavity is arranged in the cavity of the outer head cover, and the sealed transition cavity is not connected with the cavity composed of the shell and the outer head cover. The sealed transition cavity is formed by a hook ring flange, a floating tube sheet, and a floating head cover. The floating tube sheet is installed with a positioning plug between the opposite end surfaces of the hook ring flange and the connecting flange of the floating head cover. The hook ring flange and the connecting flange of the floating head cover are fastened and connected by bolts. A plurality of straight heat exchange tubes are arranged between the fixed tube sheet and the floating tube sheet, and one end of each of the straight heat exchange tubes passes through the fixed tube sheet and then connects to the inner cavity of the tube box, and the other end of each of the straight heat exchange tubes passes through the floating tube sheet and then connects to the sealed transition cavity; A first baffle is provided in the inner ring wall area of ​​the second connecting flange, and a second baffle arranged vertically is provided in the area directly below each of the feed pipe openings, and a straight heat exchange tube runs through the thickness direction of each of the second baffles. All the second baffles are installed inside the cavity of the shell, and both ends of the second baffle in the height direction are spaced from the corresponding inner wall of the shell, and a horizontal anti-collision baffle is fixedly connected to the top of the second baffle, and the surface area of ​​the anti-collision baffle blocks the area directly below the feed pipe opening; A third baffle is arranged in the inner cavity of the shell between the adjacent feed pipe ports, and the third baffle is arranged outside the surface area of ​​the anti-collision baffle, and the straight heat exchange tube penetrates through the thickness direction of each third baffle, and all the third baffles are installed inside the cavity of the shell, and the two ends of the third baffle in the height direction are spaced from the corresponding inner wall of the shell; Each of the second baffle plates is respectively arranged on the central plane directly below the feed pipe opening, and the second baffle plates are arranged perpendicular to the straight heat exchange tubes.

2. The crude phenol overhead condenser according to claim 1, wherein: Corresponding distance tubes are arranged in the surface areas between the fixed tube plate and the second baffle plate close to the fixed tube plate, between the third baffle plate and the second baffle plate, and between the second baffle plate and the first baffle plate.

3. The crude phenol overhead condenser according to claim 1, wherein: The straight heat exchange tube passes through the second baffle, the third baffle, and the first baffle at corresponding positions.

4. The crude phenol overhead condenser according to claim 1, wherein: The straight heat exchange tube is arranged in the middle area of ​​the inner cavity of the shell in the height direction; an anti-sound vibration plate is arranged inside the inner cavity of the shell.

5. The crude phenol overhead condenser according to claim 1, wherein: The upper surface of the shell is provided with four feed pipe openings along its length direction, and the lower surface of the shell is provided with four discharge pipe openings along its length direction, and the spacing distances between adjacent feed pipe openings of the shell are equal.

6. The crude phenol overhead condenser according to claim 1, wherein: The tube box is provided with a first flange at a position corresponding to the fixed tube sheet, the fixed tube sheet is provided between the first flange and the first connecting flange, both end surfaces of the fixed tube sheet are respectively surrounded by gaskets and arranged tightly against the corresponding end surfaces of the first flange and the first connecting flange, and the first flange and the first connecting flange are fastened and connected by bolts.

7. The crude phenol overhead condenser according to claim 1, wherein: A second flange is provided at a position of the outer head cover facing the second connecting flange, and the second flange is fixedly connected to the second connecting flange by bolts.

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