Anti-coking heat exchanger

Abstract

An anti-coking heat exchanger comprises a heat exchanger body, a driving device, a plurality of heat exchange tubes and a plurality of coke scale scraping rods, the driving device is arranged on the heat exchanger body, the heat exchange tubes are arranged in the heat exchanger body, the coke scale scraping rods are arranged in the heat exchange tubes, one end of each coke scale scraping rod is connected with the driving device, and the other end of each coke scale scraping rod is connected with the driving device. The scraping device is driven by the driving device to do reciprocating motion in the axial direction of the heat exchange pipe so as to scrape coke dirt on the inner wall of the heat exchange pipe; compared with the prior art, the coke scale scraping rod is driven by the driving device to reciprocate in the heat exchange tube to scrape coke deposits on the inner wall of the heat exchange tube, so that the heat exchange tube is prevented from being blocked by the coke deposits, and the influence on material circulation and the heat exchange effect of the heat exchanger is avoided; and meanwhile, the coke scale scraping rod of the shaftless spiral structure can reduce the occupation of the internal space of the heat exchange tube, and the circulation of the materials in the heat exchange tube cannot be hindered when the coke deposits are scraped.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange equipment, in particular to an anti-coking heat exchanger. Background Art

[0002] Heat exchangers are usually used in the production process of chemical materials. When chemical materials are passing through the heat exchanger for heat exchange, they are easy to adhere to the inner wall of the heat exchange tube in a high temperature environment, accumulate to form coke, block the heat exchange tube, affect the material flow, and also affect the heat exchange efficiency of the heat exchanger, making it difficult for production to meet process requirements; at the same time, manual disassembly and cleaning of the heat exchange tube is time-consuming and labor-intensive, and will also increase the downtime waiting time, affecting production efficiency.

[0003] Chinese patent application number 202321618210.8 discloses a heat exchanger anti-coking device for crude benzene production. The heat exchanger anti-coking device changes the rough flow direction of the raw materials entering the tubes through discs and triangular pieces, realizes continuous flow flushing of the inner wall of the tubes, and the colloid is not easy to adhere to the inner wall of the tubes, avoiding the generation of coking deposits. The above-disclosed heat exchanger anti-coking device can only delay the generation of coking deposits, and cannot scrape the coking deposits generated on the inner wall. Utility Model Content

[0004] In view of the above shortcomings, the technical problem to be solved by the utility model is to provide an anti-coking heat exchanger, which can scrape the coking deposits generated on the inner wall of the heat exchange tube.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an anti-coking heat exchanger, including a heat exchanger body, a driving device, a plurality of heat exchange tubes and a plurality of coke scraper rods; the driving device is arranged on the heat exchanger body, and the plurality of heat exchange tubes are arranged in the heat exchanger body; the coke scraper rod is arranged in the heat exchange tube, one end of which is connected to the driving device, and is driven by the driving device to reciprocate along the axial direction of the heat exchange tube to scrape the coke on the inner wall of the heat exchange tube.

[0006] As a preferred solution of the utility model, the heat exchanger body includes a first sealed shell, a second sealed shell and a third sealed shell; the first sealed shell and the third sealed shell are located at both ends of the second sealed shell and are fixedly sealed and connected to the second sealed shell.

[0007] As a preferred solution of the utility model, multiple heat exchange tube transverse fixings and multiple heat exchange tube longitudinal fixings are arranged inside the second sealed shell; the multiple heat exchange tube transverse fixings are arranged parallel to the multiple heat exchange tubes, and the multiple heat exchange tube longitudinal fixings are arranged vertically to the multiple heat exchange tubes.

[0008] As a preferred solution of the utility model, one end of the heat exchange tube transverse fixing piece is fixedly connected to the inner wall of the second sealed shell, and the other end is fixedly connected to any one of the heat exchange tubes; one end of the heat exchange tube longitudinal fixing piece is fixedly connected to the end of the second sealed shell, and the other end is fixedly connected to any one of the heat exchange tube transverse fixing pieces.

[0009] As a preferred solution of the utility model, the heat exchange tube is fixed in the second sealed shell, and both ends of the heat exchange tube pass through both ends of the second sealed shell respectively and communicate with the interior of the first sealed shell and the third sealed shell.

[0010] As a preferred solution of the utility model, the heat exchange tube is connected to at least one heat exchange tube transverse fixing member, and the heat exchange tube transverse fixing member is connected to at least one heat exchange tube longitudinal fixing member.

[0011] As a preferred solution of the utility model, the coke scraper rod is a shaftless spiral structure, and its outer edge is in contact with the inner wall of the heat exchange tube.

[0012] As a preferred solution of the utility model, the number of the coke scraper rods is equal to the number of the heat exchange tubes, and only one coke scraper rod is arranged in one heat exchange tube.

[0013] As a preferred solution of the utility model, the length of the coke scraper rod is greater than the length of the heat exchange tube.

[0014] As a preferred solution of the utility model, the driving device includes a permanent magnet motor, a lifting hydraulic box and a scraper rod connecting piece which are connected in sequence; the coke scraper rod is fixedly connected to the scraper rod connecting piece.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The drive device drives the coke scraper to reciprocate in the heat exchange tube to scrape the coke deposits on the inner wall of the heat exchange tube to prevent the coke deposits from clogging the heat exchange tube and affecting the flow of materials and the heat exchange effect of the heat exchanger. At the same time, the shaftless spiral structure of the coke scraper can reduce the space occupied by the heat exchange tube, and will not hinder the flow of materials in the heat exchange tube when scraping the coke deposits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of an anti-coking heat exchanger provided in an embodiment of the present application;

[0018] Figure markings: heat exchanger body 1, first sealed shell 1-1, second sealed shell 1-2, heat exchange tube transverse fixing piece 1-21, heat exchange tube longitudinal fixing piece 1-22, third sealed shell 1-3, drive device 2, permanent magnet motor 2-1, lifting hydraulic box 2-2, scraper rod connecting piece 2-3, heat exchange tube 3, coke scraper rod 4. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0020] The following description provides examples and does not limit the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements described without departing from the scope of the present application. Various processes or components may be appropriately omitted, substituted or added to each example. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted or combined. In addition, features described in some examples may be combined in other examples.

[0021] See also Figure 1 , Figure 1 The schematic diagram of the structure of an anti-coking heat exchanger provided in an embodiment of the present application is shown. Figure 1 As shown, an anti-coking heat exchanger includes a heat exchanger body 1, a driving device 2, a plurality of heat exchange tubes 3 and a plurality of coke scraper rods 4; the driving device 2 is arranged on the heat exchanger body 1, and the plurality of heat exchange tubes 3 are arranged in the heat exchanger body 1; the coke scraper rod 4 is arranged in the heat exchange tube 3, one end of which is connected to the driving device 2, and is driven by the driving device 2 to reciprocate along the axial direction of the heat exchange tube 3 to scrape the coke on the inner wall of the heat exchange tube 3.

[0022] Specifically, one end of the driving device 2 passes through the heat exchanger body 1 and is fixedly connected to the coke scraper rod 4 in the heat exchanger body 1; the heat exchange tube 3 is fixedly arranged in the heat exchanger body 1 along the length direction of the heat exchanger body 1, and the coke scraper rod 4 is arranged in the heat exchange tube 3 and coincides with the axis of the heat exchange tube 3; the driving device 2 is started, and the coke scraper rod 4 reciprocates along the length direction of the heat exchange tube 3 driven by the driving device 2, scrapes the coke deposits attached to the inner wall of the heat exchange tube 3, peels off the coke deposits from the inner wall of the heat exchange tube 3, and dredges the heat exchange tube 3.

[0023] As an optional embodiment of the present application, the heat exchanger body 1 includes a first sealed shell 1-1, a second sealed shell 1-2 and a third sealed shell 1-3; the first sealed shell 1-1 and the third sealed shell 1-3 are located at both ends of the second sealed shell 1-2 and are fixedly sealed and connected to the second sealed shell 1-2.

[0024] See here Figure 1 The schematic diagram of the structure of an anti-coking heat exchanger provided in the embodiment of the present application is shown. Figure 1 As shown, specifically, the heat exchanger body 1 adopts a three-end surface mechanical seal structure to withstand a large pressure and prevent the heat exchanger from leaking during operation.

[0025] As an optional embodiment of the present application, a plurality of heat exchange tube transverse fixings 1-21 and a plurality of heat exchange tube longitudinal fixings 1-22 are arranged inside the second sealed shell 1-2; the plurality of heat exchange tube transverse fixings 1-21 are arranged parallel to the plurality of heat exchange tubes 3, and the plurality of heat exchange tube longitudinal fixings 1-22 are arranged vertically to the plurality of heat exchange tubes 3.

[0026] See here Figure 1 The schematic diagram of the structure of an anti-coking heat exchanger provided in the embodiment of the present application is shown. Figure 1 As shown, specifically, a plurality of heat exchange tube transverse fixing members 1-21 and a plurality of heat exchange tube longitudinal fixing members 1-22 are fixed inside the second sealed shell 1-2. The heat exchange tube transverse fixing members 1-21 and the heat exchange tube longitudinal fixing members 1-22 fix the heat exchange tube 3 to prevent the heat exchange tube 3 from shaking violently under the disturbance of the fluid inside the heat exchanger.

[0027] As an optional embodiment of the present application, one end of the heat exchange tube transverse fixing piece 1-21 is fixedly connected to the inner wall of the second sealed shell 1-2, and the other end is fixedly connected to any one of the heat exchange tubes 3; one end of the heat exchange tube longitudinal fixing piece 1-22 is fixedly connected to the end of the second sealed shell 1-2, and the other end is fixedly connected to any one of the heat exchange tube transverse fixing pieces 1-21.

[0028] See here Figure 1 The schematic diagram of the structure of an anti-coking heat exchanger provided in the embodiment of the present application is shown. Figure 1 As shown, specifically, the heat exchange tube transverse fixing member 1-21 provides support and fixation for the heat exchange tube 3, and the heat exchange tube longitudinal fixing member 1-22 cooperates with the second sealed shell 1-2 to provide support and fixation for the heat exchange tube transverse fixing member 1-21.

[0029] Furthermore, both ends of the heat exchange tube longitudinal fixing member 1-22 can be fixed to the second sealed shell 1-2 to increase the connection strength and support strength of the heat exchange tube longitudinal fixing member 1-22.

[0030] As an optional embodiment of the present application, the heat exchange tube 3 is fixed in the second sealed shell 1-2, and both ends of the heat exchange tube 3 pass through the two ends of the second sealed shell 1-2 respectively, and are connected with the interior of the first sealed shell 1-1 and the third sealed shell 1-3.

[0031] See here Figure 1 The schematic diagram of the structure of an anti-coking heat exchanger provided in the embodiment of the present application is shown. Figure 1 As shown, specifically, the material flows through the heat exchange tube 3 to perform heat exchange at the second sealed shell 1-2.

[0032] As an option in the embodiment of the present application, the heat exchange tube 3 is connected to at least one heat exchange tube transverse fixing member 1-21, and the heat exchange tube transverse fixing member 1-21 is connected to at least one heat exchange tube longitudinal fixing member 1-22.

[0033] See here Figure 1 The schematic diagram of the structure of an anti-coking heat exchanger provided in the embodiment of the present application is shown. Figure 1 As shown, specifically, the heat exchange tube transverse fixing member 1-21 supports and fixes the heat exchange tube 3. The more heat exchange tube transverse fixing members 1-21 connected to the same heat exchange tube 3, the more stable the support and fixation are; the heat exchange tube longitudinal fixing members 1-22 support and fix the heat exchange tube transverse fixing member 1-21. The more heat exchange tube longitudinal fixing members 1-22 connected to the same heat exchange tube transverse fixing member 1-21, the more stable the support and fixation are.

[0034] As an option in the embodiment of the present application, the coke scraper rod 4 is a shaftless spiral structure, and its outer edge is in contact with the inner wall of the heat exchange tube 3.

[0035] See here Figure 1 The schematic diagram of the structure of an anti-coking heat exchanger provided in the embodiment of the present application is shown. Figure 1 As shown, specifically, a coke scraper 4 with a shaftless spiral structure is used to reduce the space occupied by the coke scraper 4 in the heat exchange tube 3, thereby reducing the influence of the coke scraper 4 on the material flow in the heat exchange tube 3; the coke scraper 4 is in contact with the inner wall of the heat exchange tube 3, and the inner wall of the heat exchange tube 3 is scraped under the drive of the driving device 2, so as to peel off the coke deposits from the inner wall of the heat exchange tube 3.

[0036] Furthermore, the coke scraper rod 4 is made of a corrosion-resistant, shaftless, thickened material.

[0037] As an option in the embodiment of the present application, the number of the coke scraper rods 4 is equal to the number of the heat exchange tubes 3 , and only one coke scraper rod 4 is arranged in one heat exchange tube 3 .

[0038] As an option in the embodiment of the present application, the length of the coke scraper rod 4 is greater than the length of the heat exchange tube 3 .

[0039] See here Figure 1 The schematic diagram of the structure of an anti-coking heat exchanger provided in the embodiment of the present application is shown. Figure 1 As shown, specifically, part of the coke scraper rod 4 is located in the first sealed shell 1-1. If the length of the coke scraper rod 4 is less than or equal to the length of the heat exchange tube 3, coke deposits will appear at the end of the heat exchange tube 3 away from the first sealed shell 1-1, causing the material to be blocked at that part of the heat exchange tube 3, affecting the flow of the material.

[0040] As an optional embodiment of the present application, the driving device 2 includes a permanent magnet motor 2-1, a lifting hydraulic box 2-2 and a scraper rod connector 2-3 connected in sequence; the coke scraper rod 4 is fixedly connected to the scraper rod connector 2-3.

[0041] See here Figure 1 The schematic diagram of the structure of an anti-coking heat exchanger provided in the embodiment of the present application is shown. Figure 1 As shown, specifically, the permanent magnet motor 2-1 and the lifting hydraulic box 2-2 are used to provide power to the coke scraper bar 4 and control the reciprocating speed of the coke scraper bar 4.

[0042] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0043] Although this article uses more of the following terms: heat exchanger body 1, first sealed shell 1-1, second sealed shell 1-2, heat exchange tube transverse fixing member 1-21, heat exchange tube longitudinal fixing member 1-22, third sealed shell 1-3, drive device 2, permanent magnet motor 2-1, lifting hydraulic box 2-2, scraper rod connecting member 2-3, heat exchange tube 3, coke scraper rod 4, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. An anti-coking heat exchanger, characterized in that: The invention comprises a heat exchanger body (1), a driving device (2), a plurality of heat exchange tubes (3) and a plurality of coke scraper rods (4); the driving device (2) is arranged on the heat exchanger body (1), and the plurality of heat exchange tubes (3) are arranged in the heat exchanger body (1); the coke scraper rods (4) are arranged in the heat exchange tubes (3), one end of which is connected to the driving device (2), and which, driven by the driving device (2), reciprocate along the axial direction of the heat exchange tubes (3) to scrape the coke on the inner wall of the heat exchange tubes (3).

2. The anti-coking heat exchanger according to claim 1, characterized in that: The heat exchanger body (1) comprises a first sealed shell (1-1), a second sealed shell (1-2) and a third sealed shell (1-3); the first sealed shell (1-1) and the third sealed shell (1-3) are located at two ends of the second sealed shell (1-2) and are fixedly sealed and connected to the second sealed shell (1-2).

3. The anti-coking heat exchanger according to claim 2, characterized in that: A plurality of heat exchange tube transverse fixing members (1-21) and a plurality of heat exchange tube longitudinal fixing members (1-22) are arranged inside the second sealed shell (1-2); the plurality of heat exchange tube transverse fixing members (1-21) and the plurality of heat exchange tubes (3) are arranged in parallel, and the plurality of heat exchange tube longitudinal fixing members (1-22) and the plurality of heat exchange tubes (3) are arranged vertically.

4. The anti-coking heat exchanger according to claim 3, characterized in that: One end of the heat exchange tube transverse fixing piece (1-21) is fixedly connected to the inner wall of the second sealed shell (1-2), and the other end is fixedly connected to any one of the heat exchange tubes (3); one end of the heat exchange tube longitudinal fixing piece (1-22) is fixedly connected to the end of the second sealed shell (1-2), and the other end is fixedly connected to any one of the heat exchange tube transverse fixing pieces (1-21).

5. The anti-coking heat exchanger according to claim 1, characterized in that: The heat exchange tube (3) is fixedly arranged in the second sealed shell (1-2), and two ends of the heat exchange tube (3) respectively pass through two ends of the second sealed shell (1-2) and are connected with the interior of the first sealed shell (1-1) and the third sealed shell (1-3).

6. The anti-coking heat exchanger according to claim 5, characterized in that: The heat exchange tube (3) is connected to at least one heat exchange tube transverse fixing member (1-21), and the heat exchange tube transverse fixing member (1-21) is connected to at least one heat exchange tube longitudinal fixing member (1-22).

7. The anti-coking heat exchanger according to claim 1, characterized in that: The coke scraper rod (4) is a shaftless spiral structure, and its outer edge is in contact with the inner wall of the heat exchange tube (3).

8. The anti-coking heat exchanger according to claim 1, characterized in that: The number of the coke scraper rods (4) is equal to the number of the heat exchange tubes (3), and only one coke scraper rod (4) is arranged in one heat exchange tube (3).

9. The anti-coking heat exchanger according to claim 1, characterized in that: The length of the coke scraper rod (4) is greater than the length of the heat exchange tube (3).

10. The anti-coking heat exchanger according to claim 1, characterized in that: The driving device (2) comprises a permanent magnet motor (2-1), a lifting hydraulic box (2-2) and a scraper rod connecting piece (2-3) which are connected in sequence; the coke scraper rod (4) is fixedly connected to the scraper rod connecting piece (2-3).

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