Dynamic seal cooling device of horizontal high-temperature cracking furnace and use method of dynamic seal cooling device

Abstract

The invention belongs to the technical field of tar residue pyrolysis, and particularly relates to a dynamic seal cooling device of a horizontal high-temperature cracking furnace and a use method of the dynamic seal cooling device. By arranging the cooling device, the working temperature of the packing can be effectively reduced, the cooling device is of a hollow annular structure, heat is taken away through flowing of circulating liquid, and therefore the service life of the packing is greatly prolonged. Therefore, the requirement for frequently replacing the packing is reduced, and the maintenance cost is reduced. Due to the fact that the durability of the packing is improved, the shutdown time of a machine due to the fact that the packing is replaced is greatly shortened, for production enterprises, the higher equipment utilization rate and the more stable production process are achieved, and economic losses caused by shutdown are reduced. The cooling device is designed into the first arc-shaped pipeline and the second arc-shaped pipeline which are symmetrical, so that the circulating liquid can uniformly flow through the whole cooling device, and the cooling effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tar residue pyrolysis, and in particular relates to a dynamic sealing cooling device of a horizontal high-temperature cracking furnace and a use method thereof. Background Art

[0002] With the continuous improvement of environmental awareness, tar residue treatment has become an important issue. Traditional tar residue treatment methods are inefficient, costly, and highly polluting, which have an inevitable impact on the environment. Continuous pyrolysis technology of tar residue is one of the emerging tar residue treatment technologies. It is a technology that heats tar residue to a high temperature to decompose it into substances such as gas, liquid and solid. This technology has high efficiency in treating tar residue, low treatment cost, and good environmental protection. At the same time, it can also recover useful substances such as tar, gasoline, and diesel, and has high economic value.

[0003] Dynamic sealing is one of the key technologies for achieving industrial continuous pyrolysis, that is, to ensure that tar residue continuously enters the cracking furnace and solid products are continuously exported from the cracking furnace, while preventing air from entering the cracking furnace and avoiding oil and gas leakage in the cracking furnace, thereby isolating air from oil and gas. The pyrolysis of tar residue and the transportation of products are all carried out in closed equipment and pipelines, fundamentally eliminating the occurrence of leakage. Under anaerobic or oxygen-deficient conditions, safe, stable and continuous pyrolysis is the key to achieving continuity.

[0004] The tar residue high temperature cracking furnace currently in use includes a hot air smoke box and a rear head, and a main engine rotating cylinder that rotates relative to the hot air smoke box and the rear head respectively. The hot air smoke box and the main engine rotating cylinder, and the main engine rotating cylinder and the rear head are dynamically sealed by packing. The existing problem is that the temperature of the tar residue high temperature cracking furnace is as high as 510°C, while the maximum tolerance temperature of the packing is 450°C. Running under continuous high temperature will greatly reduce the durability of the packing. Each packing will be damaged after a few days of use at high temperature, forcing the machine to be shut down to replace new packing. Shutdown means production suspension. For production-oriented enterprises, frequent shutdowns to replace packing will bring extremely high production costs. Therefore, a device for cooling the packing is urgently needed to improve the durability of the packing and reduce the loss of the enterprise.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The object of the present invention is to overcome the above-mentioned shortcomings of the prior art and to provide a dynamic sealing cooling device for a horizontal high-temperature cracking furnace and a method for using the same.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] On the one hand, the present invention provides a dynamic sealing cooling device for a horizontal high-temperature cracking furnace, comprising a cracking furnace for high-temperature cracking of tar residues, the cracking furnace comprising a fixedly arranged hot air smoke box, a main engine rotating cylinder that is rotatably fixed to the hot air smoke box and used to accommodate the tar residues to be cracked, one end of the main engine rotating cylinder extends out of the hot air smoke box and is also rotatably fixed to a rear head for receiving the tar residues after cracking, the rear head is rotatably connected to the main engine rotating cylinder, a smoke packing for preventing hot air from leaking out is provided between the hot air smoke box and the main engine rotating cylinder, and an oil and gas packing for preventing oil and gas from leaking out is provided between the rear head and the main engine rotating cylinder;

[0009] The flue gas packing is axially limited by a first flange pressure plate fixed on the hot air smoke box, and the oil and gas packing is axially limited by a second flange pressure plate fixed on the rear head; the flue gas packing and the oil and gas packing are circumferentially provided with a cooling device for cooling, each of the cooling devices is a hollow annular structure that is convenient for the flow of circulating liquid and is respectively adapted to the shape of the flue gas packing and the oil and gas packing, each of the cooling devices is provided with a circulating liquid inlet at the bottom and a circulating liquid outlet at the top; the cooling device of the flue gas packing and the cooling device of the oil and gas packing have the same structure, and both share the same cooling tower, cooling water tank and circulating water pump.

[0010] Specifically, a first limit platform is fixedly provided on the hot air smoke box, and the smoke packing is axially limited by the first limit platform and the first flange pressure plate; a second limit platform is fixedly provided on the rear head, and the oil and gas packing is axially limited by the second limit platform and the second flange pressure plate; the first limit platform and the second limit platform are both annular structures.

[0011] Specifically, the circulating liquid outlet is also connected to the cooling tower, the cooling water tank, the circulating water pump, and the circulating liquid inlet in sequence.

[0012] Specifically, the cooling device consists of a first arc-shaped pipe and a second arc-shaped pipe which are symmetrical to each other. The first arc-shaped pipe has a first circulating liquid inlet at the bottom and a first circulating liquid outlet at the top. The second arc-shaped pipe has a second circulating liquid inlet at the bottom and a second circulating liquid outlet at the top. The first circulating liquid outlet intersects with the second circulating liquid outlet and is connected to a cooling tower and a cooling water tank in turn. The cooling water tank is connected to the first circulating liquid inlet and the second circulating liquid inlet respectively through a circulating water pump.

[0013] Specifically, the first arc-shaped pipeline is composed of a plurality of discontinuous short pipelines, and adjacent short pipelines are connected by small arc-shaped pipelines for increasing the residence time of the circulating fluid. The small arc-shaped pipeline is located on the side of the first arc-shaped pipeline away from the main engine rotating cylinder.

[0014] Specifically, the circulating fluid may be one of water, heat transfer oil, and refrigerant.

[0015] Specifically, the cross section of each cooling device is a square structure, and the surface of the cooling device in contact with the hot air smoke box is attached with aluminum silicate industrial rock wool to prevent energy loss of the hot air smoke box.

[0016] Specifically, the first flange pressure plate is detachably connected to the hot air smoke box through screws and nuts, and the second flange pressure plate is detachably connected to the rear head through screws and nuts.

[0017] On the other hand, the present invention also provides a method for using the dynamic seal cooling device, which is as follows:

[0018] When the horizontal high-temperature pyrolysis furnace starts to operate, first turn on the circulating water pump to allow the circulating liquid to continuously enter the cooling device from the cooling water tank through the circulating liquid inlet, thereby effectively cooling the flue gas packing and the oil and gas packing, and reducing the operating temperature of the flue gas packing and the oil and gas packing to less than 450°C; the used circulating liquid is cooled from the circulating liquid outlet through a pipeline to the cooling tower, and then enters the cooling water tank for storage, in order to continue to circulate and cool the flue gas packing and the oil and gas packing.

[0019] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] The present invention can effectively reduce the working temperature of the packing by providing a cooling device. The cooling device adopts a hollow ring structure and removes heat through the flow of circulating fluid, thereby greatly extending the service life of the packing. This reduces the need for frequent replacement of the packing and reduces maintenance costs. Due to the improved durability of the packing, the downtime of the machine due to packing replacement is greatly reduced, which means higher equipment utilization and more stable production process for production enterprises, reducing economic losses caused by downtime.

[0021] Furthermore, the cooling device is designed as a symmetrical first arc-shaped pipeline and a second arc-shaped pipeline, each pipeline is provided with an inlet at the bottom and an outlet at the top; this design enables the circulating fluid to flow evenly through the entire cooling device, thereby improving the cooling effect. Preferably, the first arc-shaped pipeline and the second arc-shaped pipeline are both composed of a plurality of discontinuous short pipelines, and are connected by small arc-shaped pipelines, thereby increasing the residence time of the circulating fluid and enhancing the cooling effect.

[0022] Furthermore, the cooling device forms a complete cooling system with components such as cooling tower, cooling water tank, circulating water pump, etc., which ensures the stability and reliability of the cooling process. This integrated design makes the whole system more compact and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 is a cross-sectional view of this embodiment;

[0026] Figure 2 for Figure 1 A partial cross-section enlarged schematic diagram of the A direction;

[0027] Figure 3 This is a schematic diagram of the cooling device structure of Example 1 of this embodiment;

[0028] Figure 4 This is a schematic diagram of the cooling device structure of Example 2 of this embodiment;

[0029] Figure 5 This is a schematic diagram of the cooling device structure of Example 3 of this embodiment.

[0030] Among them: 1 is a cracking furnace; 11 is a first flange pressure plate; 12 is a second flange pressure plate; 13 is a screw; 14 is a hot air smoke box; 15 is a main engine rotating cylinder; 16 is a first limit table; 17 is a second limit table; 2 is a rear head; 3 is a flue gas packing; 4 is an oil and gas packing; 5 is a cooling device; 51 is a first arc pipe; 52 is a second arc pipe; 53 is a short pipe; 54 is a small arc pipe; 6 is a circulating liquid inlet; 61 is a first circulating liquid inlet; 62 is a second circulating liquid inlet; 7 is a circulating liquid outlet; 71 is a first circulating liquid outlet; 72 is a second circulating liquid outlet; 8 is a cooling tower; 9 is a cooling water tank; 10 is a circulating water pump. DETAILED DESCRIPTION

[0031] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this embodiment. Instead, they are only examples consistent with some aspects of this embodiment as detailed in the attached claims; the cooling device of the flue gas packing and the cooling device of the oil and gas packing described in the text are two annular devices with the same structure, and the two cooling devices share a set of cooling towers, cooling water tanks and circulating water pumps.

[0032] In order to enable those skilled in the art to better understand the technical solution of this embodiment, this embodiment is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] Example 1

[0034] See also Figure 1-3 As shown, this embodiment provides a dynamic sealing cooling device for a horizontal high-temperature cracking furnace, comprising a cracking furnace 1 for high-temperature cracking of tar residues, wherein the cracking furnace 1 comprises a fixedly arranged hot air smoke box 14, a main engine rotating cylinder 15 which is rotatably fixed to the hot air smoke box 14 and used to accommodate the tar residues to be cracked, one end of the main engine rotating cylinder 15 extends out of the hot air smoke box 14 and is also rotatably fixed to a rear head 2 for receiving the tar residues after cracking, the rear head 2 is rotatably connected to the main engine rotating cylinder 15, a flue gas packing 3 for preventing hot air from leaking out is provided between the hot air smoke box 14 and the main engine rotating cylinder 15, and an oil and gas packing 4 for preventing oil and gas from leaking out is provided between the rear head 2 and the main engine rotating cylinder 15;

[0035] The flue gas packing 3 is axially limited by the first flange pressure plate 11 fixed on the hot air smoke box 14, and the oil and gas packing 4 is axially limited by the second flange pressure plate 12 fixed on the rear head 2; the flue gas packing 3 and the oil and gas packing 4 are circumferentially provided with a cooling device 5 for cooling, each of which is a hollow annular structure that is convenient for the flow of circulating liquid and is respectively matched with the flue gas packing 3 and the oil and gas packing 4. The bottom of each cooling device 5 is provided with a circulating liquid inlet 6 and the top is provided with a circulating liquid outlet 7. Figure 3 shown.

[0036] Specifically, a first limit platform 16 is fixedly provided on the hot air smoke box 14, and the smoke packing 3 is axially limited by the first limit platform 16 and the first flange pressure plate 11. A second limit platform 17 is fixedly provided on the rear head 2, and the oil and gas packing 4 is axially limited by the second limit platform 17 and the second flange pressure plate 12.

[0037] Specifically, the circulating liquid outlet 7 is also connected to the cooling tower 8, the cooling water tank 9, the circulating water pump 10, and the circulating liquid inlet 6 in sequence.

[0038] Specifically, the circulating fluid may be one of water, heat transfer oil, and refrigerant.

[0039] Specifically, the cross section of each cooling device 5 is a square structure, and the surface of the cooling device 5 in contact with the hot air smoke box 14 is attached with aluminum silicate industrial rock wool to prevent energy loss of the hot air smoke box 14.

[0040] Specifically, the first flange pressure plate 11 is detachably connected to the hot air smoke box 14 through a screw 13 and a nut, and the second flange pressure plate 12 is detachably connected to the rear head 2 through a screw 13 and a nut.

[0041] See also Figure 3 As shown, this embodiment also provides an operating method of a dynamic seal cooling device, which is as follows:

[0042] When the horizontal high-temperature pyrolysis furnace starts to operate, first turn on the circulating water pump 10 to allow the circulating liquid to enter the two cooling devices 5 from the cooling water tank 9 through the circulating liquid inlet 6, thereby effectively cooling the flue gas packing 3 and the oil and gas packing 4, so that the use temperature of the flue gas packing 3 and the oil and gas packing 4 is reduced to less than 450°C; the used circulating liquid is passed from the circulating liquid outlet 7 through a pipeline to the cooling tower 8 for cooling, and then enters the cooling water tank 9 for storage, so as to continue to circulate and cool the flue gas packing 3 and the oil and gas packing 4.

[0043] Example 2

[0044] The difference between this embodiment and embodiment 1 is that each of the cooling devices 5 is composed of a first arc-shaped pipe 51 and a second arc-shaped pipe 52 which are symmetrical to each other. The first arc-shaped pipe 51 has a first circulating liquid inlet 61 at the bottom and a first circulating liquid outlet 71 at the top. The second arc-shaped pipe 52 has a second circulating liquid inlet 62 at the bottom and a second circulating liquid outlet 72 at the top. The first circulating liquid outlet 71 and the second circulating liquid outlet 72 intersect and are connected to the cooling tower 8 and the cooling water tank 9 in turn. The cooling water tank 9 is connected to the first circulating liquid inlet 61 and the second circulating liquid inlet 62 respectively through the circulating water pump 10. Figure 4 shown.

[0045] This embodiment also provides an operating method of a dynamic seal cooling device, which is as follows:

[0046] The cooling device 5 of the flue gas packing 3 and the cooling device 5 of the oil and gas packing 4 have the same structure, and the two cooling devices 5 are connected to a set of cooling tower 8, cooling water tank 9 and circulating water pump 10; when the horizontal high-temperature pyrolysis furnace starts to operate, the circulating water pump 10 is first turned on to allow the circulating liquid to pass through the main pipeline from the cooling water tank 9 and enter the first arc pipe 51 and the second arc pipe 52 through the first circulating liquid inlet 61 and the second circulating liquid inlet 62, respectively, so as to effectively cool the flue gas packing 3 and the oil and gas packing 4, so that the use temperature of the flue gas packing 3 and the oil and gas packing 4 is reduced to below 450°C; the used circulating liquid passes through the first circulating liquid outlet 71 and the second circulating liquid outlet 72 respectively and then is collected together, and is led to the cooling tower 8 through a pipeline for cooling, and then enters the cooling water tank 9 to continue cooling the flue gas packing 3 and the oil and gas packing 4.

[0047] Example 3

[0048] The difference between this embodiment and embodiment 2 is that the first arc-shaped pipeline 51 is composed of a plurality of discontinuous short pipelines 53, and the adjacent short pipelines 53 are connected by a small arc-shaped pipeline 54 for increasing the residence time of the circulating liquid, and the small arc-shaped pipeline 54 is located on the side of the first arc-shaped pipeline 51 away from the main engine rotating cylinder 15; the first arc-shaped pipeline 51 and the second arc-shaped pipeline 52 have the same structure; see Figure 5shown.

[0049] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0050] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A dynamic seal cooling device for a horizontal high-temperature cracking furnace, characterized in that: The invention comprises a cracking furnace (1) for high-temperature cracking of tar residue, wherein the cracking furnace (1) comprises a fixedly arranged hot air smoke box (14), a main engine rotating cylinder (15) which is rotatably fixed to the hot air smoke box (14) and used to accommodate the tar residue to be cracked, one end of the main engine rotating cylinder (15) is extended out of the hot air smoke box (14) and is also rotatably fixed to a rear end cover (2) for receiving the tar residue after cracking, the rear end cover (2) is rotatably connected to the main engine rotating cylinder (15), a smoke packing (3) for preventing hot air from leaking out is arranged between the hot air smoke box (14) and the main engine rotating cylinder (15), and an oil and gas packing (4) for preventing oil and gas from leaking out is arranged between the rear end cover (2) and the main engine rotating cylinder (15); A first limiting platform (16) is fixedly provided on the hot air smoke box (14), and the flue gas packing (3) is axially limited by the first limiting platform (16) and the first flange pressure plate (11); a second limiting platform (17) is fixedly provided on the rear head (2), and the oil and gas packing (4) is axially limited by the second limiting platform (17) and the second flange pressure plate (12); a cooling device (5) for cooling is provided in the circumference of the flue gas packing (3) and the oil and gas packing (4); each of the cooling devices (5) is a hollow annular structure for facilitating the flow of circulating liquid and is respectively matched with the shape of the flue gas packing (3) and the oil and gas packing (4); a circulating liquid inlet (6) is provided at the bottom of each of the cooling devices (5), and a circulating liquid outlet (7) is provided at the top; each of the circulating liquid outlets (7) is sequentially connected to a cooling tower (8), a cooling water tank (9), a circulating water pump (10), and a circulating liquid inlet (6).

2. The dynamic seal cooling device according to claim 1, characterized in that: The cooling device (5) is composed of a first arc-shaped pipe (51) and a second arc-shaped pipe (52) which are symmetrical to each other. The first arc-shaped pipe (51) is provided with a first circulating liquid inlet (61) at the bottom and a first circulating liquid outlet (71) at the top. The second arc-shaped pipe (52) is provided with a second circulating liquid inlet (62) at the bottom and a second circulating liquid outlet (72) at the top. The first circulating liquid outlet (71) and the second circulating liquid outlet (72) are connected to a cooling tower (8) and a cooling water tank (9) in sequence after the first circulating liquid outlet (71) and the second circulating liquid outlet (72) intersect. The cooling water tank (9) is respectively connected to the first circulating liquid inlet (61) and the second circulating liquid inlet (62) through a circulating water pump (10).

3. The dynamic seal cooling device according to claim 1, characterized in that: The first arc-shaped pipeline (51) is composed of a plurality of discontinuous short pipelines (53), and adjacent short pipelines (53) are connected through a small arc-shaped pipeline (54) for increasing the residence time of the circulating liquid. The small arc-shaped pipeline (54) is located on a side of the first arc-shaped pipeline (51) away from the main machine rotating cylinder (15).

4. The dynamic seal cooling device according to claim 1, characterized in that: The circulating fluid may be one of water, heat transfer oil and refrigerant.

5. The dynamic seal cooling device according to claim 1, characterized in that: The cross section of each cooling device (5) is a square structure, and the surface of the cooling device (5) in contact with the hot air smoke box (14) is affixed with aluminum silicate industrial rock wool to prevent energy loss of the hot air smoke box (14).

6. The dynamic seal cooling device according to claim 1, characterized in that: The first flange pressure plate (11) is detachably connected to the hot air smoke box (14) via a screw (13) and a nut, and the second flange pressure plate (12) is detachably connected to the rear head (2) via a screw (13) and a nut.

7. A method for using the dynamic seal cooling device according to any one of claims 1 to 6, characterized in that: The details are as follows: When the horizontal high-temperature pyrolysis furnace starts to operate, the circulating water pump (10) is first turned on to allow the circulating liquid to continuously flow from the cooling water tank (9) through the circulating liquid inlet (6) into the cooling device (5), thereby effectively cooling the flue gas packing (3) and the oil and gas packing (4), so that the use temperature of the flue gas packing (3) and the oil and gas packing (4) is reduced to less than 450° C. The used circulating liquid flows from the circulating liquid outlet (7) through a pipeline to a cooling tower (8) for cooling, and then enters the cooling water tank (9) for storage, so as to continue to circulate and cool the flue gas packing (3) and the oil and gas packing (4).

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