A heat exchange structure for a purification tower

Abstract

The present invention relates to a heat exchange structure for a purification tower, which includes a skirt support and a purification tower main body supported on the skirt support. The purification tower main body includes an upper head, a lower head and a cylinder body. A plurality of external cylinder heat tracing mechanisms are arranged on the outer side of the cylinder body. Each external cylinder heat tracing mechanism includes a plurality of external cylinder heat tracing components. Each external cylinder heat tracing component includes: a first upper arc tube, a first lower arc tube and a plurality of first connecting tubes. An external upper head heat tracing mechanism is arranged on the outer side of the upper head. The external upper head heat tracing mechanism includes a plurality of external upper head heat tracing components. Each external upper head heat tracing component includes: a second upper arc tube, a second lower arc tube and a plurality of second connecting tubes. The first upper arc tube, the first lower arc tube, the first connecting tubes, the second upper arc tube, the second lower arc tube and the second connecting tubes are all installed on the purification tower main body through fixing components, so as to increase the flow rate of steam and thus improve the heat exchange efficiency.

Description

Technical Field

[0001] The present invention relates to the field of chemical machinery, and particularly to a heat exchange structure for a purification column.

Background Art

[0002] A reaction vessel refers to a container used to complete physical and chemical reactions of media. In industrial production, especially in industries such as chemical engineering, medicine, chemical fertilizers, and refining, reaction vessels, as a type of pressure-bearing equipment, are widely used due to process requirements.

[0003] In chemical reactions, there are extremely high requirements for the reaction temperature. In the prior art, a jacketed heat exchange structure or an external coil heat exchange structure is generally used to achieve heat exchange. Refer to Chinese Patent No. CN200720096580.4, which discloses a high-efficiency gas-liquid reactor for the liquid-phase carbonylation of methyl acetate to produce acetic anhydride. A jacketed heat exchange structure is provided on the outer side of the cylinder body. The jacket is directly welded to the outer wall of the cylinder body, so that a receiving space for receiving the heat exchange medium is formed between the jacket and the cylinder body, and a medium inlet and a medium outlet communicating with the receiving space are provided on the jacket. The defect of this heat exchange structure is that since the jacket is welded to the outer wall of the cylinder body, when the jacket is damaged and replaced, the structure of the cylinder body will be damaged. As is well known, in the field of pressure vessels, the cylinder body as the main structure is not allowed to be damaged.

[0004] Refer to Chinese Patent No. CN202021076891.6, which discloses an external coil type uniformly stirred reaction kettle. A group of external coils are provided on the outer side of the cylinder body. The inside of the external coils is the heat exchange medium channel. One free end of the external coils is the heat exchange medium inlet, and the other free end is the heat exchange medium outlet. The defect of this heat exchange structure is that the external coils are a whole structure. Once the external coils are damaged, the entire group of external coils must be replaced, which increases the economic burden of the enterprise. In addition, in this external coil type heat exchange structure, since the heat exchange medium channel is relatively long, the flow rate of the heat exchange medium is slow, thereby greatly reducing the heat exchange efficiency.

[0005] Therefore, it is necessary to provide a heat exchange structure for a purification column that solves the above technical problems.

Summary of the Invention

[0006] To solve the above problems, the purpose of the present invention is to provide a heat exchange structure for a purification column that can improve the heat exchange efficiency.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: A heat exchange structure for a purification tower, comprising a skirt support and a purification tower main body supported on the skirt support. The purification tower main body includes an upper head, a lower head, and a cylinder body disposed between the upper head and the lower head. A plurality of external cylinder heat tracing mechanisms are arranged along the longitudinal direction of the cylinder body on the outer side of the cylinder body. Each external cylinder heat tracing mechanism includes a plurality of external cylinder heat tracing components, and the plurality of external cylinder heat tracing components are arranged in a surrounding structure to cover the circumference of the cylinder body. Each external cylinder heat tracing component includes: a first upper arc tube, a first lower arc tube, and a plurality of first connecting tubes connected between the first upper arc tube and the first lower arc tube. The first upper arc tube, the first lower arc tube, and the first connecting tubes communicate with each other internally. The first upper arc tube is connected to the cylinder body heat tracing steam inlet pipe, and the first lower arc tube is connected to the cylinder body heat tracing condensate outlet pipe. An external upper head heat tracing mechanism is provided on the outer side of the upper head. The external upper head heat tracing mechanism includes a plurality of external upper head heat tracing components. Each external upper head heat tracing component includes: a second upper arc tube, a second lower arc tube, and a plurality of second connecting tubes for connecting the second upper arc tube and the second lower arc tube. The second upper arc tube, the second lower arc tube, and the second connecting tubes communicate with each other internally. The second upper arc tube is connected to the upper head heat tracing steam inlet pipe, and the second lower arc tube is connected to the upper head heat tracing condensate outlet pipe. The first upper arc tube, the first lower arc tube, the first connecting tubes, the second upper arc tube, the second lower arc tube, and the second connecting tubes are all installed on the purification tower main body through fixing components.

[0008] Preferably, a heat exchange structure for a purification tower in the present invention is further provided as follows: The fixing component includes: a first backing plate, a second backing plate, a bolt, a washer, a sleeve, a nut, and a connecting angle steel. The first backing plate is welded to the purification tower main body. The bolt includes a head and a screw rod. The head of the bolt is welded to the first backing plate. The washer and the sleeve are both sleeved on the screw rod of the bolt. The connecting angle steel is provided with a clamping portion for clamping the pipeline and a through hole matching the screw rod of the bolt. The connecting angle steel is installed on the screw rod of the bolt through the through hole and fixed by the nut. The second backing plate is welded to the first backing plate, and the pipeline is clamped between the second backing plate and the clamping portion of the connecting angle steel.

[0009] Preferably, a heat exchange structure for a purification tower in the present invention is further provided as follows: The second backing plate is a non-asbestos fiber rubber plate.

[0010] Preferably, a heat exchange structure for a purification tower in the present invention is further provided as follows: The shape of the inner wall surface of the clamping portion is matched with the shape of the pipeline.

[0011] Preferably, a heat exchange structure for a purification tower in the present invention is further provided as follows: The first upper arc tube and the first lower arc tube have the same size, and the first connecting tube is a straight tube.

[0012] Preferably, a purification tower heat exchange structure in the present invention is further configured as follows: a plurality of first connecting pipes are evenly arranged in parallel between the first upper circular arc pipe and the first lower circular arc pipe.

[0013] Preferably, a purification tower heat exchange structure in the present invention is further configured as follows: the second upper arc tube and the second lower arc tube are of different sizes, the second connecting tube is an arc tube, and the curvature of the second connecting tube matches the curvature of the upper head.

[0014] Preferably, a purification tower heat exchange structure in the present invention is further configured as follows: a plurality of second connecting pipes are arranged in a fan shape between the second upper arc pipe and the second lower arc pipe.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention arranges a plurality of external heating mechanisms along the longitudinal direction of the cylinder, each of which is composed of a plurality of external heating components, and each external heating component is provided with a separate cylinder heating steam inlet pipe and a cylinder heating condensate outlet pipe, thereby forming a modular design of the heat exchange structure. The advantage of this design is that since each module is provided with a separate cylinder heating steam inlet pipe and a cylinder heating condensate outlet pipe, the flow rate of the heating steam can be greatly increased, thereby improving the heat exchange efficiency. In addition, in this heat exchange structure, when a certain external heating component of the cylinder is damaged (that is, when a certain module is damaged), only the damaged module needs to be replaced, and the other heat exchange structures can remain unchanged, which not only greatly reduces the difficulty of maintenance, but also saves maintenance costs and improves maintenance efficiency. Similarly, the present invention also carries out a modular design for the external heating mechanism of the upper head, which also solves the problems of heat exchange efficiency and maintenance. In addition, all pipelines in the present invention are installed on the purification tower body through fixed components. During the maintenance and disassembly process, it is only necessary to loosen the nuts and then remove the connecting angle steel to remove the pipeline for replacement. The main structure of the purification tower will not be damaged during the whole process. Therefore, this structural design also protects the main structure of the purification tower.

Brief Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of the heat exchange structure of the purification tower in the present invention.

[0017] Figure 2 It is a schematic diagram of the main structure of the external heating mechanism of the cylinder in the present invention.

[0018] Figure 3 It is a schematic top view of the external heating mechanism of the cylinder in the present invention.

[0019] Figure 4 It is a schematic top view of the external heating mechanism of the upper head in the present invention.

[0020] Figure 5 This is a schematic diagram of the installation structure of the first upper arc tube and the cylinder body in the present invention.

[0021] Figures 1 to 5 In the figure: 1, skirt support; 2, upper head; 3, lower head; 4, cylinder body; 5, external heat tracing mechanism of the cylinder body; 50, external heat tracing assembly of the cylinder body; 500, first upper arc tube; 501, first lower arc tube; 502, first connecting tube; 503, steam inlet pipe for heat tracing of the cylinder body; 504, condensate outlet pipe for heat tracing of the cylinder body; 6, fixing assembly; 60, first backing plate; 61, second backing plate; 62, bolt; 620, head; 621, screw rod; 63, washer; 64, sleeve; 65, nut; 66, connecting angle steel; 660, clamping part; 661, perforation; 7, external heat tracing mechanism of the upper head; 70, external heat tracing assembly of the upper head; 700, second upper arc tube; 701, second lower arc tube; 702, second connecting tube; 703, steam inlet pipe for heat tracing of the upper head; 704, condensate outlet pipe for heat tracing of the upper head.

Specific Embodiment

[0022] The following further describes in detail a heat exchange structure of a purification tower according to the present invention through specific embodiments.

[0023] As shown Figures 1 to 5 in the figure, a heat exchange structure of a purification tower includes a skirt support 1 and a purification tower main body supported on the skirt support 1. The purification tower main body includes an upper head 2, a lower head 3, and a cylinder body 4 disposed between the upper head 2 and the lower head 3.

[0024] Seven external cylinder heat tracing mechanisms 5 are arranged on the outer side of the cylinder body 4 along the longitudinal direction of the cylinder body. Each external cylinder heat tracing mechanism 5 includes four external cylinder heat tracing components 50. The four external cylinder heat tracing components 50 are arranged in an enclosed structure to cover the circumference of the cylinder body 4. Each external cylinder heat tracing component 50 includes: a first upper arc tube 500, a first lower arc tube 501, and several first connecting tubes 502 connected between the first upper arc tube 500 and the first lower arc tube 501. The first upper arc tube 500 and the first lower arc tube 501 have the same size, and the first connecting tubes 502 are straight tubes. A plurality of first connecting tubes 502 are arranged in parallel and evenly between the first upper arc tube 500 and the first lower arc tube 501. The first upper arc tube 500, the first lower arc tube 501, and the first connecting tubes 502 are all internally interconnected. The first upper arc tube 500 is connected to the cylinder body heat tracing steam inlet pipe 503, and the first lower arc tube 501 is connected to the cylinder body heat tracing condensate outlet pipe 504. In this embodiment, a total of seven external cylinder heat tracing mechanisms 5 are provided. Each external cylinder heat tracing mechanism 5 includes four external cylinder heat tracing components 50. Each external cylinder heat tracing component 50 is provided with two cylinder body heat tracing steam inlet pipes 503 and two cylinder body heat tracing condensate outlet pipes 504. Of course, in other embodiments, the number of the external cylinder heat tracing mechanisms 5, the number of the external cylinder heat tracing components 50, the number of the cylinder body heat tracing steam inlet pipes 503, and the number of the cylinder body heat tracing condensate outlet pipes 504 can all be set according to specific working conditions.

[0025] The first upper arc tube 500 is installed on the cylinder body 4 through the fixing assembly 6. The fixing assembly 6 includes: a first backing plate 60, a second backing plate 61, a bolt 62, a washer 63, a sleeve 64, a nut 65 and a connecting angle steel 66. The first backing plate 60 is welded to the cylinder body 4. The bolt 62 includes a head 620 and a screw rod 621. The head 620 of the bolt 62 is welded to the first backing plate 60. The washer 63 and the sleeve 64 are both sleeved on the screw rod 621 of the bolt 62. The connecting angle steel 66 is provided with a clamping portion 660 for clamping the first upper arc tube 500 and a through hole 661 for cooperating with the screw rod 621 of the bolt 62. The connecting angle steel 66 is installed on the screw rod 621 of the bolt 62 through the through hole 661 and fixed by the nut 65. The second backing plate 61 is a non-asbestos fiber rubber plate, which can play a buffering role when impacted, thereby protecting the cylinder body 4 and the first upper arc tube 500. The second backing plate 61 is welded to the first backing plate 60. The first upper arc tube 500 is clamped between the second backing plate 61 and the clamping portion 660 of the connecting angle steel 66. The shape of the inner wall surface of the clamping portion 660 is matched with the shape of the first upper arc tube 500, thereby improving the connection stability. The connection structures of the first lower arc tube 501 and the first connecting tube 502 with the cylinder body 4 are the same as the connection structure of the first upper arc tube 500 with the cylinder body 4, and are all installed through the above-mentioned fixing assembly 6. During maintenance and disassembly, first unscrew the nut 65, and then remove the connecting angle steel 66 from the bolt 62, which will not damage the main structure of the purification tower.

[0026] An external heat tracing mechanism 7 for the upper head 2 is provided on the outer side of the upper head 2. The external heat tracing mechanism 7 for the upper head includes two external heat tracing components 70 for the upper head. Each external heat tracing component 70 for the upper head includes: a second upper arc tube 700, a second lower arc tube 701, and a plurality of second connecting tubes 702 for connecting the second upper arc tube 700 and the second lower arc tube 701. The second upper arc tube 700 and the second lower arc tube 701 are of different sizes. The second connecting tube 702 is an arc tube, and the radian of the second connecting tube 702 coincides with the radian of the upper head 2. The plurality of second connecting tubes 702 are arranged in a fan shape between the second upper arc tube 700 and the second lower arc tube 701. The second upper arc tube 700, the second lower arc tube 701, and the second connecting tubes 702 communicate with each other internally. The second upper arc tube 700 is connected to the upper head heat tracing steam inlet pipe 703, and the second lower arc tube 701 is connected to the upper head heat tracing condensate outlet pipe 704. The connection structure between the second upper arc tube 700, the second lower arc tube 701, and the second connecting tubes 702 and the upper head 2 is the same as the connection structure between the first upper arc tube 500 and the cylinder body 4, and both are installed through the fixing component 6. In this embodiment, two external heat tracing components 70 for the upper head are provided in total. Each external heat tracing component 70 for the upper head is provided with an upper head heat tracing steam inlet pipe 703 and an upper head heat tracing condensate outlet pipe 704. Of course, in other embodiments, the number of the external heat tracing components 70 for the upper head, the number of the upper head heat tracing steam inlet pipes 703, and the number of the upper head heat tracing condensate outlet pipes 704 can be set according to specific working conditions.

[0027] The working principle of the heat exchange structure of the purification tower in the present invention is as follows: All the cylinder body heat tracing steam inlet pipes 503 and all the upper head heat tracing steam inlet pipes 703 in the present invention are connected to an external steam source through pipelines. During heat exchange, external steam enters each external heat tracing component 50 of the cylinder body simultaneously through a plurality of cylinder body heat tracing steam inlet pipes 503, and heat exchange occurs in each external heat tracing component 50 of the cylinder body. The condensate generated after heat exchange flows out through their respective cylinder body heat tracing condensate outlet pipes 504, thereby greatly increasing the flow rate of the steam and further improving the heat exchange efficiency. Similarly, during heat exchange, external steam enters each external heat tracing component 70 of the upper head simultaneously through a plurality of upper head heat tracing steam inlet pipes 703, and heat exchange occurs in each external heat tracing component 70 of the upper head. The condensate generated after heat exchange flows out through their respective upper head heat tracing condensate outlet pipes 704. The heat exchange of the external heat tracing component 50 of the cylinder body and the external heat tracing component 70 of the upper head is carried out simultaneously.

[0028] In summary, in the present invention, both the external heat tracing mechanism of the cylinder body and the external heat tracing mechanism of the upper head are designed as modular structures, which can greatly increase the steam flow rate and thus improve the heat exchange efficiency. In addition, all heat exchange pipes of the present invention are connected to the main body of the purification tower through fixing components, so the main body of the purification tower will not be damaged during maintenance and replacement.

[0029] The above embodiments are only illustrative of the principles and effects of the present invention and some applied embodiments, rather than limiting the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention.

Claims

1. A heat exchange structure for a purification tower, comprising a skirt support and a purification tower main body supported on the skirt support. The purification tower main body includes an upper head, a lower head, and a cylinder body disposed between the upper head and the lower head, and is characterized in that: The outer side of the cylinder is provided with a plurality of cylinder external heating mechanisms along the longitudinal direction of the cylinder, each cylinder external heating mechanism includes a plurality of cylinder external heating components, and the plurality of cylinder external heating components are wrapped around the circumference of the cylinder in an enclosing structure, and each cylinder external heating component includes: a first upper arc tube, a first lower arc tube and a plurality of first connecting pipes connected between the first upper arc tube and the first lower arc tube, the first upper arc tube, the first lower arc tube and the first connecting pipe are all connected to each other, the first upper arc tube is connected to the cylinder heating steam inlet pipe, and the first lower arc tube is connected to the cylinder heating condensate outlet pipe, the outer side of the upper head is provided with an upper head external heating mechanism, the upper head external heating mechanism includes a plurality of upper head external heating components, and each upper head external heating component includes: a second upper arc tube, a second lower arc tube and a plurality of second connecting pipes for connecting the second upper arc tube and the second lower arc tube, the second upper arc tube, The interiors of the second lower arc tube and the second connecting tube are interconnected, the second upper arc tube is connected to the upper head heating steam inlet pipe, and the second lower arc tube is connected to the upper head heating condensate outlet pipe, the first upper arc tube, the first lower arc tube, the first connecting tube, the second upper arc tube, the second lower arc tube and the second connecting tube are all installed on the purification tower body through a fixing assembly, and the fixing assembly includes: a first pad, a second pad, a bolt, a washer, a sleeve, a nut and a connecting angle steel, the first pad is welded to the purification tower body, the bolt includes a head and a screw, the head of the bolt is welded to the first pad, the washer and the sleeve are both sleeved on the screw of the bolt, the connecting angle steel is provided with a holding portion for holding the pipeline and a through hole matching the screw of the bolt, the connecting angle steel is installed on the screw of the bolt through the through hole and fixed by a nut, the second pad is welded to the first pad, and the pipeline is clamped between the second pad and the holding portion of the connecting angle steel.

2. The heat exchange structure of a purification tower according to claim 1, characterized in that: The second pad is a non-asbestos fiber rubber plate.

3. The heat exchange structure of a purification column as described in claim 1, wherein: The shape of the inner wall surface of the clamping portion is consistent with the shape of the pipeline.

4. The heat exchange structure of a purification column according to claim 1, characterized in that: The first upper arc tube and the first lower arc tube have the same size, and the first connecting tube is a straight tube.

5. The heat exchange structure of a purification column according to claim 1, wherein: A plurality of first connecting tubes are evenly arranged in parallel between the first upper arc tube and the first lower arc tube.

6. The heat exchange structure of a purification column according to claim 1, characterized in that: The second upper arc tube and the second lower arc tube have different sizes. The second connecting tube is an arc-shaped tube, and the curvature of the second connecting tube matches the curvature of the upper head.

7. The heat exchange structure of a purification column according to claim 1, characterized in that: A plurality of second connecting tubes are arranged in a fan shape between the second upper arc tube and the second lower arc tube.

Images