Petrochemical cracking furnace with heat exchange mechanism

Abstract

The utility model relates to a petrochemical cracking furnace with a heat exchange mechanism, which comprises a heat exchange box and a heat exchange pipeline arranged in the heat exchange box, a cleaning component for cleaning the heat exchange pipeline is arranged on the inner top wall of the heat exchange box, and a dust collection component extending into the heat exchange box is arranged outside the heat exchange box; the cleaning assembly comprises a telescopic electric cylinder fixedly installed on the inner top wall of the heat exchange box, and a cleaning brush is fixedly installed at the output end of the telescopic electric cylinder. The dust suction assembly comprises a dust suction box fixedly installed outside the heat exchange box, a dust suction fan is fixedly installed on the front face of the dust suction box, a suction pipe is detachably installed on the inner wall of the heat exchange box, and a plurality of suction nozzles distributed at equal intervals fixedly communicate with the exterior of the suction pipe. According to the petrochemical cracking furnace with the heat exchange mechanism, through cooperative use of the over-cleaning assembly and the dust collection assembly, cleaning of the heat exchange pipeline is achieved, dust residues are reduced, the cleaning effect is improved, and therefore the advantages of being high in practicability, good in cleaning effect and the like are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a petrochemical cracking furnace with a heat exchange mechanism. Background Art

[0002] A cracking furnace refers to a device used to crack hydrocarbons. The exhaust gas generated by the cracking furnace contains a large amount of heat, which needs to be recycled. The existing waste heat recovery of the cracking furnace is generally done by exchanging the exhaust gas with a heat exchanger box. However, the high-temperature exhaust gas generated by the cracking furnace contains a lot of insoluble organic matter. These insoluble organic matter easily adhere to the heat exchange manifold in the heat exchanger box, affecting the recovery effect of the waste heat. The inside of the heat exchanger box can only be cleaned and maintained once in a while, which is cumbersome to operate and affects the normal waste heat recovery operation. In particular, when recovering waste heat from some exhaust gases containing a large amount of insoluble organic components, the frequency of cleaning and maintenance increases, resulting in poor reliability.

[0003] After searching, Chinese patent CN115451717A discloses a waste heat recovery system for a cracking furnace, which includes a heat exchange box, a heat exchange mechanism, a filtering mechanism and a first cleaning mechanism. The heat exchange box has a cavity and an air inlet and an exhaust port connected to the cavity, and the air inlet is located at the bottom of the heat exchange box; the heat exchange mechanism includes a heat exchange manifold arranged in the cavity; the filtering mechanism is arranged in the cavity and is located below the heat exchange mechanism, the filtering mechanism includes a filter screen, and the first cleaning mechanism includes a rotating frame rotatably arranged at the bottom of the filter screen, a driving component, a scraper and a high-temperature jet component, the high-temperature jet component includes a jet pipe, and the jet pipe is provided with a jet hole facing the bottom of the filter screen. When the waste heat recovery system of the cracking furnace recovers heat from some waste gas containing insoluble organic matter, it is convenient to clean the attached organic components in the heat exchange box to ensure the normal recovery of waste heat.

[0004] The application discloses a lifting cleaning brush to clean the heat exchange tubes. However, the lifting of the cleaning brush stirs up dust, causing the cleaned dust to fall into other places, seriously affecting the dust cleaning quality and failing to meet the use requirements. Therefore, a petrochemical cracking furnace with a heat exchange mechanism is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a petrochemical cracking furnace with a heat exchange mechanism, which has the advantages of strong practicability and good cleaning effect, and solves the problem that dust is stirred up when the cleaning brush is raised and lowered, causing the cleaned dust to fall into other places, seriously affecting the dust cleaning quality.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a petrochemical cracking furnace with a heat exchange mechanism, comprising a heat exchange box and a heat exchange pipe arranged inside the heat exchange box, a cleaning component for cleaning the heat exchange pipe is arranged on the inner top wall of the heat exchange box, and a dust collection component extending into the heat exchange box is arranged outside the heat exchange box;

[0007] The cleaning assembly comprises a telescopic electric cylinder fixedly mounted on the top wall of the heat exchange box, and a cleaning brush is fixedly mounted on the output end of the telescopic electric cylinder;

[0008] The dust collection assembly includes a dust collection box fixedly installed on the outside of the heat exchange box, a dust collection fan is fixedly installed on the front of the dust collection box, a suction pipe is detachably installed on the inner wall of the heat exchange box, and the outside of the suction pipe is fixedly connected to a plurality of equally spaced suction nozzles.

[0009] Furthermore, an air inlet pipe and an air outlet pipe are respectively installed at the left and right ends of the heat exchange pipe, and a discharge pipe is fixedly connected to the lower surface of the heat exchange box.

[0010] Furthermore, a cleaning mechanism extending into the heat exchange box is disposed outside the heat exchange box, and the cleaning mechanism includes a first servo motor and a cleaning frame, wherein the output shaft of the first servo motor extends into the heat exchange box and is fixed to the lower surface of the cleaning frame.

[0011] Furthermore, both ends of the suction pipe extend to the outside of the heat exchange box, and a connecting pipe is fixedly connected to the lower surface of the dust collection box.

[0012] Furthermore, an adjustment component for adjusting the suction pipe is arranged outside the heat exchange box, and the adjustment component includes a second servo motor, a transmission gear and a driven gear. The transmission gear is fixedly mounted on the output shaft of the second servo motor, and the driven gear is fixedly mounted on the left end of the connecting pipe.

[0013] Furthermore, the transmission gear and the driven gear are meshed with each other, and a rotating head is provided between the right end of the suction pipe and the connecting pipe.

[0014] Furthermore, four symmetrically arranged drainage seats are fixedly mounted on the inner bottom wall of the heat exchange box, and the four drainage seats are symmetrically arranged in groups of two.

[0015] Compared with the prior art, the utility model provides a petrochemical cracking furnace with a heat exchange mechanism, which has the following beneficial effects:

[0016] 1. The petrochemical cracking furnace with a heat exchange mechanism can clean the heat exchange pipe, reduce dust residue, and improve the cleaning effect by using a cleaning component and a dust collection component in coordination, thereby achieving the advantages of strong practicality and good cleaning effect, and solving the problem that dust is stirred up when the cleaning brush is raised and lowered, causing the cleaned dust to fall into other places, seriously affecting the dust cleaning quality.

[0017] 2. The petrochemical cracking furnace with a heat exchange mechanism starts the second servo motor so that its output shaft drives the transmission gear to rotate. The transmission gear rotates and meshes with the driven gear to drive the suction pipe to rotate back and forth, thereby improving the dust collection effect of the suction nozzle and further strengthening the cleaning of the heat exchange pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0019] Figure 2 This is a structural stereogram of the cleaning rack of the utility model;

[0020] Figure 3 For this utility model Figure 1 A is a schematic diagram of the enlarged structure shown.

[0021] In the figure: 1. heat exchange box; 2. heat exchange pipe; 3. discharge pipe; 4. first servo motor; 5. cleaning rack; 6. telescopic electric cylinder; 7. cleaning brush; 8. dust suction box; 9. dust suction fan; 10. suction pipe; 11. suction nozzle; 12. connecting pipe; 13. second servo motor; 14. transmission gear; 15. driven gear; 16. adapter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 A petrochemical cracking furnace with a heat exchange mechanism includes a heat exchange box 1 and a heat exchange pipe 2 arranged inside the heat exchange box 1. The outside of the heat exchange box 1 is provided with a dust collection component extending into the inside; the left and right ends of the heat exchange pipe 2 are respectively provided with an air inlet pipe and an air outlet pipe, and the lower surface of the heat exchange box 1 is fixedly connected with a discharge pipe 3. There are two discharge pipes 3, and four symmetrically arranged drainage seats are fixedly installed on the inner bottom wall of the heat exchange box 1, and the four drainage seats are symmetrically arranged in groups of two. The distribution positions of the four drainage seats are adapted to the two discharge pipes 3.

[0024] The outside of the heat exchange box 1 is provided with a cleaning mechanism extending therein, and the cleaning mechanism includes a first servo motor 4 and a cleaning rack 5. The output shaft of the first servo motor 4 extends to the inside of the heat exchange box 1 and is fixed to the lower surface of the cleaning rack 5. Both sides of the cleaning rack 5 are adapted to the inner wall of the heat exchange box 1. The outside of the heat exchange box 1 is cylindrical. The heat exchange tube 2 exchanges heat with the high-temperature exhaust gas flowing through the heat exchange box 1 in the heat exchange box 1, thereby recovering the waste heat.

[0025] In this embodiment, a cleaning assembly for cleaning the heat exchange pipe 2 is provided on the inner top wall of the heat box 1, and the cleaning assembly includes a telescopic electric cylinder 6 fixedly mounted on the inner top wall of the heat exchange box 1, and a cleaning brush 7 is fixedly mounted on the output end of the telescopic electric cylinder 6. The output distance of the telescopic electric cylinder 6 is adapted to the length of the heat exchange pipe 2.

[0026] In this embodiment, the outside of the heat exchange box 1 is provided with a dust collection assembly extending into the inside thereof; the dust collection assembly includes a dust collection box 8 fixedly mounted on the outside of the heat exchange box 1, a dust collection fan 9 fixedly mounted on the front of the dust collection box 8, a suction pipe 10 detachably mounted on the inner wall of the heat exchange box 1, and a plurality of equally spaced suction nozzles 11 are fixedly connected to the outside of the suction pipe 10. Both ends of the suction pipe 10 extend to the outside of the heat exchange box 1, and a connecting pipe 12 is fixedly connected to the lower surface of the dust collection box 8.

[0027] It should be noted that the input end of the dust suction fan 9 is connected to the dust suction box 8. A filter plate is detachably installed inside the dust suction box 8 to facilitate centralized treatment of dust.

[0028] In this embodiment, an adjustment component for adjusting the suction pipe 10 is provided on the outside of the heat exchange box 1, and the adjustment component includes a second servo motor 13, a transmission gear 14 and a driven gear 15. The transmission gear 14 is fixedly mounted on the output shaft of the second servo motor 13, and the driven gear 15 is fixedly mounted on the left end of the connecting pipe 12.

[0029] The transmission gear 14 is meshed with the driven gear 15 , and a rotating head 16 is provided between the right end of the suction pipe 10 and the connecting pipe 12 .

[0030] The working principle of the above embodiment is:

[0031] Start the telescopic electric cylinder 6 so that its output end drives the cleaning brush 7 to move up and down. The cleaning brush 7 moves to remove dust from the outside of the heat exchange pipe 1. At the same time, start the dust suction fan 9 to form a negative pressure inside the dust box 8. At this time, the suction nozzle 11 sucks in the cleaned dust and transports it to the inside of the dust box 8 through the suction pipe 10 and the connecting pipe 12 for storage.

[0032] The electrical components appearing in the text are all electrically connected to the controller and the power supply. The control method of the utility model is controlled by the controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power supply is also common knowledge in this field. The utility model is mainly used to protect mechanical devices, so the utility model will no longer explain the control method and circuit connection in detail.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A petrochemical cracking furnace with a heat exchange mechanism, comprising a heat exchange box (1) and a heat exchange pipe (2) arranged inside the heat exchange box (1), characterized in that: A cleaning component for cleaning the heat exchange pipe (2) is arranged on the inner top wall of the heat exchange box (1), and a dust collection component extending into the heat exchange box (1) is arranged on the outside of the heat exchange box (1); The cleaning component comprises a telescopic electric cylinder (6) fixedly mounted on the inner top wall of the heat exchange box (1), and a cleaning brush (7) is fixedly mounted on the output end of the telescopic electric cylinder (6); The dust collection assembly comprises a dust collection box (8) fixedly mounted on the outside of the heat exchange box (1), a dust collection fan (9) fixedly mounted on the front of the dust collection box (8), a suction pipe (10) detachably mounted on the inner wall of the heat exchange box (1), and a plurality of suction nozzles (11) fixedly connected to the outside of the suction pipe (10) and distributed at equal distances.

2. A petrochemical cracking furnace with a heat exchange mechanism according to claim 1, characterized in that: An air inlet pipe and an air outlet pipe are respectively installed at the left and right ends of the heat exchange pipe (2), and a discharge pipe (3) is fixedly connected to the lower surface of the heat exchange box (1).

3. The petrochemical cracking furnace with a heat exchange mechanism according to claim 1, characterized in that: A cleaning mechanism extending into the heat exchange box (1) is arranged outside the heat exchange box (1), the cleaning mechanism comprising a first servo motor (4) and a cleaning frame (5), the output shaft of the first servo motor (4) extending into the interior of the heat exchange box (1) and being fixed to the lower surface of the cleaning frame (5).

4. The petrochemical cracking furnace with a heat exchange mechanism according to claim 1, characterized in that: Both ends of the suction pipe (10) extend to the outside of the heat exchange box (1), and a connecting pipe (12) is fixedly connected to the lower surface of the dust collection box (8).

5. The petrochemical cracking furnace with a heat exchange mechanism according to claim 1, characterized in that: An adjustment component for adjusting the suction pipe (10) is arranged outside the heat exchange box (1), and the adjustment component comprises a second servo motor (13), a transmission gear (14) and a driven gear (15), wherein the transmission gear (14) is fixedly mounted on the output shaft of the second servo motor (13), and the driven gear (15) is fixedly mounted on the left end of the connecting pipe (12).

6. A petrochemical cracking furnace with a heat exchange mechanism according to claim 5, characterized in that: The transmission gear (14) and the driven gear (15) are meshed with each other, and a rotating head (16) is provided between the right end of the suction pipe (10) and the connecting pipe (12).

7. The petrochemical cracking furnace with a heat exchange mechanism according to claim 1, characterized in that: Four symmetrically arranged drainage seats are fixedly mounted on the inner bottom wall of the heat exchange box (1), and the four drainage seats are symmetrically arranged in groups of two.

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