Waste heat recovery structure of pyrolyzing furnace

Abstract

The utility model relates to the technical field of pyrolyzing furnaces, and particularly discloses a waste heat recovery structure of a pyrolyzing furnace, which comprises a pyrolyzing furnace body, a recovery structure is arranged at the upper end part of the pyrolyzing furnace body, the recovery structure comprises a sealing end cover, a first storage groove is formed in the sealing end cover in a penetrating manner, and a smoke outlet pipe is arranged at the upper end part of the pyrolyzing furnace body. The pyrolysis furnace comprises a pyrolysis furnace body, a sealing end cover is arranged on the pyrolysis furnace body, a smoke outlet pipe is arranged between the sealing end cover and the pyrolysis furnace body, the smoke outlet pipe extends to the position above the sealing end cover through the sealing end cover, a second storage groove is formed in the smoke outlet pipe in a penetrating mode, and a heat conduction piece is fixedly installed between the second storage groove and the first storage groove. According to the pyrolyzing furnace, when the pyrolyzing furnace body exhausts smoke, heat carried by the smoke can be transmitted to the smoke outlet pipe and the heat conduction piece, the heat conduction piece can transmit the heat to the interior of the annular groove of the pyrolyzing furnace body, and therefore certain heat preservation can be provided for the interior of the pyrolyzing furnace body, and the practicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of pyrolysis furnace technology, and in particular to a waste heat recovery structure for a pyrolysis furnace. Background Technology

[0002] In the urea production process, the pyrolysis furnace plays a crucial role. Its core function is to promote the pyrolysis reaction of urea under high temperature conditions, thereby decomposing it into ammonia and carbon dioxide. To ensure that urea can be completely decomposed, the pyrolysis furnace must maintain a continuous high-temperature environment. It is worth noting that the step to prevent urea crystallization is not carried out during the pyrolysis process, but is implemented in the subsequent gas cooling stage. In this stage, by precisely controlling the temperature and environmental conditions, we can effectively prevent urea from crystallizing in pipelines and equipment.

[0003] Currently, existing devices (such as announcement number: CN219014321U) disclose a pyrolysis furnace. This device is equipped with an air inlet mechanism, which facilitates the intake of the gas to be processed into the heating tank through the air inlet pipe. The processed gas has a higher temperature and will rise, and will then be purified through the exhaust pipe by a purification mechanism. Untreated gas will be deposited at the bottom of the heating tank. The purification mechanism also helps to purify the processed gas, allowing harmful substances in the gas to be absorbed and filtered, making the emitted gas safer and more environmentally friendly.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were found: When the device is in use, the gas discharged from the pyrolysis furnace itself has a high temperature. After the gas is discharged, the temperature of the pyrolysis furnace itself will drop. The above device cannot reuse the subsequently discharged temperature to improve the heat preservation of the pyrolysis furnace. It is not environmentally friendly and needs to be improved. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a waste heat recovery structure for a pyrolysis furnace, solving the technical problem of insufficient practicality of existing devices.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A waste heat recovery structure for a pyrolysis furnace, comprising the pyrolysis furnace body;

[0010] The upper end of the pyrolysis furnace body is provided with a recycling structure;

[0011] The recycling structure includes a sealed end cap, a first storage groove is provided through the inside of the sealed end cap, a flue pipe is provided at the upper end of the pyrolysis furnace body, the flue pipe extends through the sealed end cap to the top of the sealed end cap, a second storage groove is provided through the inside of the flue pipe, a heat conduction element is fixedly installed between the second storage groove and the first storage groove, and the part of the heat conduction element exposed outside the flue pipe and the sealed end cap is provided with a heat insulation sleeve.

[0012] Preferably, the inner wall of the shell of the pyrolysis furnace body is provided with an annular groove, and an annular conductive element is provided inside the annular groove. Both the heat conductive element and the annular conductive element are made of copper, and the annular conductive element is partially exposed inside the sealed end cover.

[0013] Preferably, the annular conductive element and the heat conductive element are fixedly installed, an L-shaped plate is fixedly installed inside the smoke outlet pipe, the space inside the L-shaped plate is reserved for a placement area, a heat-resistant push rod is fixedly installed inside the L-shaped plate, and the heat-resistant push rod is located inside the placement area.

[0014] Preferably, a scraper is fixedly installed on the output shaft of the heat-resistant push rod, the scraper is in contact with the heat conduction component, the scraper is located above the second storage groove, a feed pipe is provided on the circumferential surface of the pyrolysis furnace body, and a discharge pipe is provided on the circumferential surface of the pyrolysis furnace body.

[0015] (III) Beneficial Effects

[0016] 1. Since the pyrolysis furnace body itself needs to exhaust smoke through the smoke outlet pipe during use, by setting a heat conduction component between the sealed end cover and the smoke outlet pipe, the heat carried by the flue gas can be transferred to the smoke outlet pipe and the heat conduction component when the pyrolysis furnace body exhausts smoke. This allows the heat conduction component to transfer heat to the inside of the annular groove of the pyrolysis furnace body, thereby providing a certain degree of insulation for the inside of the pyrolysis furnace body and improving its practicality.

[0017] Second, since there are particulate impurities in the flue gas, when the flue gas is discharged multiple times, the particles tend to adhere to the surface of the heat conduction component on one side of the second storage slot. By activating the heat-resistant push rod, the output shaft of the heat-resistant push rod can drive the scraper to reciprocate, thereby cleaning the impurities on the surface of the heat conduction component, thus avoiding affecting heat recovery and improving practicality. Attached Figure Description

[0018] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is an exploded view of the connection structure of this utility model;

[0021] Figure 3 This is a cross-sectional view of the smoke outlet pipe of this utility model;

[0022] Figure 4 This is an exploded structural diagram of the heat-resistant push rod connection of this utility model.

[0023] Legend: 11. Pyrolysis furnace body; 12. Sealed end cap; 13. First storage trough; 14. Smoke outlet pipe; 15. Second storage trough; 16. Heat transfer component; 17. Annular groove; 18. Annular heat transfer component; 19. L-shaped plate; 21. Placement area; 22. Heat-resistant push rod; 23. Scraper; 24. Feed pipe; 25. Discharge pipe. Detailed Implementation

[0024] This application provides a waste heat recovery structure for a pyrolysis furnace, effectively solving the technical problem of insufficient practicality of existing devices. Since the pyrolysis furnace itself needs to exhaust smoke through a flue pipe during use, a heat conduction component is installed between the sealed end cap and the flue pipe. This allows the heat carried by the flue gas to be transferred to the flue pipe and the heat conduction component during exhaust. The heat conduction component can then transfer heat to the annular groove inside the pyrolysis furnace body, providing a certain degree of insulation and improving practicality. Furthermore, since the flue gas contains particulate impurities, these particles tend to adhere to the surface of the heat conduction component on one side of the second storage slot when the flue gas is repeatedly discharged. By activating the heat-resistant push rod, the output shaft of the heat-resistant push rod drives the scraper to reciprocate, thereby cleaning the impurities on the surface of the heat conduction component and preventing any impact on heat recovery, thus improving practicality.

[0025] Example

[0026] like Figure 1 - Figure 4 As shown, the technical solution in this application embodiment effectively solves the technical problem of insufficient practicality of existing devices. The overall idea is as follows:

[0027] To address the problems existing in the prior art, this utility model provides a waste heat recovery structure for a pyrolysis furnace, including a pyrolysis furnace body 11;

[0028] A recovery structure is provided at the upper end of the pyrolysis furnace body 11;

[0029] The recycling structure includes a sealed end cap 12, with a first storage groove 13 extending through its interior. A flue pipe 14 is located at the upper end of the pyrolysis furnace body 11, extending through the sealed end cap 12 to above it. A second storage groove 15 extends through its interior. A heat transfer element 16 is fixedly installed between the second storage groove 15 and the first storage groove 13. The portion of the heat transfer element 16 exposed outside the flue pipe 14 and the sealed end cap 12 is fitted with a heat insulation sleeve. An annular groove 17 is formed on the inner wall of the pyrolysis furnace body 11, and an annular conductive element 18 is located inside the annular groove 17. The heat transfer element 16 and the annular conductive element 18... All components 18 are made of copper. The annular conductive component 18 is partially exposed inside the sealing end cover 12. The annular conductive component 18 is fixedly installed with the heat conduction component 16. Since the pyrolysis furnace body 11 needs to exhaust smoke through the smoke outlet pipe 14 during use, by setting the heat conduction component 16 between the sealing end cover 12 and the smoke outlet pipe 14, the heat carried by the flue gas can be transferred to the smoke outlet pipe 14 and the heat conduction component 16 when the pyrolysis furnace body 11 is exhausting smoke. This allows the heat conduction component 16 to transfer heat to the annular groove 17 inside the pyrolysis furnace body 11, thereby providing a certain degree of insulation for the inside of the pyrolysis furnace body 11 and improving its practicality.

[0030] An L-shaped plate 19 is fixedly installed inside the flue pipe 14. The space inside the L-shaped plate 19 is reserved for a placement area 21. A heat-resistant push rod 22 is fixedly installed inside the L-shaped plate 19. The heat-resistant push rod 22 is located inside the placement area 21. A scraper 23 is fixedly installed on the output shaft of the heat-resistant push rod 22. The scraper 23 is in contact with the heat conduction component 16 and is located above the second storage slot 15. A feed pipe 24 and a discharge pipe 25 are provided on the circumferential surface of the pyrolysis furnace body 11. Due to the presence of particles and other impurities in the flue gas, when the flue gas is discharged multiple times, the particles are likely to adhere to the surface of the heat conduction component 16 on one side of the second storage slot 15. By opening the heat-resistant push rod 22, the output shaft of the heat-resistant push rod 22 can drive the scraper 23 to reciprocate, thereby cleaning the impurities on the surface of the heat conduction component 16, thus avoiding affecting heat recovery and improving practicality.

[0031] Working principle:

[0032] In the first step, during use, the operator can first feed the material to be pyrolyzed into the pyrolysis furnace body 11 through the feed pipe 24. Then, the operator can open the pyrolysis furnace body 11 and close the valve inside the pyrolysis furnace body 11 leading to the flue gas outlet pipe 14. The operator should then carefully confirm that the various parameters of the pyrolysis furnace body 11 are set correctly, such as temperature and pressure. During the pyrolysis process, the operator needs to closely monitor the operating status of the pyrolysis furnace body 11 to ensure that the material inside the pyrolysis furnace body 11 begins to pyrolyze. After the pyrolysis is completed, the operator can then open the discharge pipe 25 and the screw conveyor inside the pyrolysis furnace body 11 to allow the material inside the pyrolysis furnace body 11 to be discharged through the discharge pipe 25. Then, the operator can open the valve leading to the flue gas outlet pipe 14 again to allow the flue gas to be discharged through the flue gas outlet pipe 14. At the same time, the gas will carry heat and circulate inside the flue gas outlet pipe 14. At this time, the heat will be transferred to the annular conductive element 18 through the heat conduction element 16, so that the annular conductive element 18 can provide a waste heat recovery and insulation function for the pyrolysis furnace body 11.

[0033] The second step involves the presence of particulate matter and other impurities in the flue gas. When the flue gas is discharged multiple times, these particles tend to adhere to the surface of the heat transfer component 16 on one side of the second storage compartment 15, thus affecting heat recovery. Subsequently, the operator can activate the heat-resistant push rod 22 to reciprocate, thereby pushing the scraper 23 to clean the impurities on the surface of the heat transfer component 16.

[0034] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all possible embodiments. However, any obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A waste heat recovery structure for a pyrolysis furnace, comprising a pyrolysis furnace body (11), characterized in that; The upper end of the pyrolysis furnace body (11) is provided with a recycling structure; The recycling structure includes a sealed end cap (12), a first storage slot (13) is provided inside the sealed end cap (12), a smoke outlet pipe (14) is provided at the upper end of the pyrolysis furnace body (11), the smoke outlet pipe (14) extends through the sealed end cap (12) to the top of the sealed end cap (12), a second storage slot (15) is provided inside the smoke outlet pipe (14), a heat conduction component (16) is fixedly installed between the second storage slot (15) and the first storage slot (13), and the part of the heat conduction component (16) exposed outside the smoke outlet pipe (14) and the sealed end cap (12) is provided with a heat insulation sleeve.

2. The waste heat recovery structure of a pyrolysis furnace as described in claim 1, characterized in that, The inner wall of the pyrolysis furnace body (11) is provided with an annular groove (17), and an annular conductive element (18) is provided inside the annular groove (17). Both the heat conductive element (16) and the annular conductive element (18) are made of copper. The annular conductive element (18) is partially exposed inside the sealed end cap (12).

3. The waste heat recovery structure of a pyrolysis furnace as described in claim 2, characterized in that, The annular conductive element (18) and the heat conductive element (16) are fixedly installed; An L-shaped plate (19) is fixedly installed inside the smoke outlet pipe (14).

4. The waste heat recovery structure of a pyrolysis furnace as described in claim 3, characterized in that, The space inside the L-shaped plate (19) is reserved for a placement area (21), and a heat-resistant push rod (22) is fixedly installed inside the L-shaped plate (19). The heat-resistant push rod (22) is located inside the placement area (21).

5. The waste heat recovery structure of a pyrolysis furnace as described in claim 4, characterized in that, A scraper (23) is fixedly installed on the output shaft of the heat-resistant push rod (22), and the scraper (23) is in contact with the heat conduction component (16); The scraper (23) is located above the second storage slot (15).

6. The waste heat recovery structure of a pyrolysis furnace as described in claim 5, characterized in that, The pyrolysis furnace body (11) is provided with a feed pipe (24) on its circumferential surface; The pyrolysis furnace body (11) is provided with a discharge pipe (25) on its circumferential surface.

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