Pressure relief system of cracking furnace

Abstract

The utility model relates to the related technical field of cracking furnaces, in particular to a cracking furnace pressure relief system which comprises a rupture disk type pressure relief device and an elastic pressure relief device, the air inlet end of the rupture disk type pressure relief device is connected with the control valve, and the end, away from the rupture disk type pressure relief device, of the control valve is installed on the furnace door. The elastic pressure relief device is arranged on a gas bag at the gas outlet end of the furnace body, a water seal or a connecting pipeline between the gas bag and the water seal, and the rupture disk type pressure relief devices or the elastic pressure relief devices are respectively arranged on the gas bag at the feeding end and the gas outlet end of the furnace body, the water seal or the connecting pipeline between the gas bag and the water seal, so that the effective pressure relief of the cracking furnace is realized; meanwhile, the control valve is arranged between the rupture disk type pressure relief device and the furnace door, so that when the rupture disk type pressure relief device is damaged, the control valve is closed to maintain or replace the rupture disk type pressure relief device, and cracking work does not need to be stopped in the maintenance or replacement process.

Description

Technical Field

[0001] The utility model relates to the technical field of cracking furnaces, in particular to a pressure relief system for a cracking furnace. Background Art

[0002] Pyrolysis is a reaction process in which substances are decomposed by heat. Many inorganic and organic substances will undergo decomposition reactions when heated to a certain extent. In the past, the pyrolysis process did not involve catalysts or other energies, such as reactions caused by ultraviolet radiation. Currently, due to factors such as improving pyrolysis efficiency, increasing the yield of pyrolysis products, and preparing products that are difficult to prepare by conventional pyrolysis, more and more research has been carried out on catalytic pyrolysis by adding catalysts during the pyrolysis process. Some catalytic pyrolysis processes, such as adding catalysts such as CaO and MgO in plastic pyrolysis, have been used in industrial production.

[0003] Waste rubber, plastics, and rubber powder all belong to pyrolysis raw materials, and generally, pyrolysis equipment is used for processing.

[0004] During the pyrolysis process, the inside of the furnace body is in a continuous high-temperature state. Therefore, a pressure difference will be generated between the inside and outside of the furnace body. When the pressure inside the furnace body is too high, a pressure relief action needs to be performed to prevent the cracking furnace from bursting. However, when the existing pressure relief device is damaged, the cracking furnace needs to stop working and cool down before maintenance, which affects the pyrolysis efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a pressure relief system for a cracking furnace to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pressure relief system for a cracking furnace includes a rupture disk type pressure relief device and an elastic pressure relief device;

[0008] The intake end of the rupture disk type pressure relief device is connected to a control valve, and one end of the control valve away from the rupture disk type pressure relief device is installed on the furnace door for controlling the connection or blockage between the inside of the furnace body and the rupture disk type pressure relief device;

[0009] The elastic pressure relief device is installed on the gas bag at the outlet end of the furnace body, on the water seal, or on the connecting pipe between the gas bag and the water seal.

[0010] The pressure relief system for a cracking furnace as described above: The rupture disk type pressure relief device includes a rupture disk and an upper clamp and a lower clamp clamped on both sides of the rupture disk;

[0011] It further includes a pressing unit for fixing the upper clamp and the lower clamp.

[0012] The cracking furnace pressure relief system as described above: An embedded groove for placing a rupture disk is formed on the lower clamp, and a pressing member is formed on the upper clamp. The pressing member can be inserted into the embedded groove and abut against the rupture disk.

[0013] The cracking furnace pressure relief system as described above: The pressing unit includes:

[0014] An upper flange and a lower flange. The upper clamp and the lower clamp are placed between the upper flange and the lower flange, and the upper flange and the lower flange are locked and fixed by a locking member.

[0015] The cracking furnace pressure relief system as described above: Sealing gaskets are provided between the upper flange and the upper clamp, and between the lower flange and the lower clamp.

[0016] The cracking furnace pressure relief system as described above: The locking member includes a bolt passing through the upper flange and the lower flange, and a nut is threadedly connected to one end of the bolt.

[0017] The cracking furnace pressure relief system as described above: Threaded holes are formed on the side walls of the upper clamp and the lower clamp, and a screw passing through a connecting piece can be threadedly connected to the threaded holes.

[0018] Compared with the prior art, the beneficial effects of the present utility model are: By respectively providing a rupture disk type pressure relief device or an elastic pressure relief device on the gas drum, the water seal, or the connecting pipe between the gas drum and the water seal at the feed end and the outlet end of the furnace body, the effective pressure relief of the cracking furnace is realized to eliminate the situation of the cracking furnace bursting. At the same time, a control valve is provided between the rupture disk type pressure relief device and the furnace door, which is convenient for closing the control valve to repair or replace the rupture disk type pressure relief device when the rupture disk type pressure relief device is damaged, and during the repair or replacement process, it is not necessary to stop the cracking work, and at the same time, the elastic pressure relief device can still maintain the corresponding pressure relief action to ensure the continuous progress of cracking. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the rupture disk type pressure relief device in the cracking furnace pressure relief system.

[0020] Figure 2 It is an exploded view of the structure of the rupture disk type pressure relief device in the cracking furnace pressure relief system.

[0021] Figure 3 It is an exploded view of the structure of the rupture disk type pressure relief device from another angle in the cracking furnace pressure relief system.

[0022] Figure 4 It is a schematic installation diagram of the rupture disk type pressure relief device and the elastic pressure relief device on the cracking furnace.

[0023] In the figure: 111 - rupture disk type pressure relief device, 1 - upper flange, 2 - sealing gasket, 3 - upper clamp, 301 - pressing piece, 4 - rupture disk, 5 - lower clamp, 501 - embedded groove, 502 - notch, 6 - lower flange, 7 - threaded hole, 8 - bolt, 9 - nut, 10 - connecting piece, 11 - screw, 222 - elastic pressure relief device. Detailed implementation manners

[0024] The following will describe in detail various exemplary embodiments, features and aspects of the present application with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0025] The special term "exemplary" here means "serving as an example, an embodiment or an illustration". Any embodiment described as "exemplary" here does not have to be construed as superior to or better than other embodiments.

[0026] In addition, for better illustration of the present application, numerous specific details are given in the following detailed embodiments. Those skilled in the art should understand that the present application can be implemented without some specific details. In some instances, methods, means and elements well known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0027] In the embodiment of the present utility model, a pressure relief system for a cracking furnace includes a rupture disk type pressure relief device 111 and an elastic pressure relief device 222; the inlet end of the rupture disk type pressure relief device 111 is connected to a control valve, and one end of the control valve away from the rupture disk type pressure relief device 111 is installed on the furnace door for controlling the communication or blockage between the inside of the furnace body and the rupture disk type pressure relief device 111; the elastic pressure relief device 222 is installed on the gas drum at the outlet end of the furnace body, on the water seal or on the connecting pipe between the gas drum and the water seal.

[0028] In this embodiment, by respectively arranging a rupture disk type pressure relief device 111 or an elastic pressure relief device 222 on the gas drum at the feed end and the outlet end of the furnace body, on the water seal or on the connecting pipe between the gas drum and the water seal, effective pressure relief of the cracking furnace is achieved to eliminate the situation of the cracking furnace bursting. At the same time, a control valve is arranged between the rupture disk type pressure relief device 111 and the furnace door, which is convenient for closing the control valve to repair or replace the rupture disk type pressure relief device 111 when the rupture disk type pressure relief device 111 is damaged, and during the repair or replacement process, it is not necessary to stop the cracking work, and at the same time, the elastic pressure relief device 222 can still maintain the corresponding pressure relief action to ensure the continuous progress of cracking.

[0029] The elastic pressure relief device 222 in this embodiment is a conventional pressure relief device, so this embodiment will not elaborate on it anymore.

[0030] Please refer to Figures 1 to 3 , the rupture disk type pressure relief device 111 includes a rupture disk 4, an upper clamp 3 and a lower clamp 5 clamped on both sides of the rupture disk 4; and further includes a pressing unit for fixing the upper clamp 3 and the lower clamp 5.

[0031] The rupture disk 4 is a YE type reverse-arch alligator-tooth rupture disk, which is composed of a single-layer diaphragm and an alligator-tooth ring. After the diaphragm is unstable and flips, the rupture disk ruptures and discharges by the alligator teeth closely attached to it.

[0032] Wherein, an inner embedded groove 501 for placing the rupture disk 4 is formed on the lower clamp 5, and a pressing member 301 is formed on the upper clamp 3. The pressing member 301 can be inserted into the inner embedded groove 501 and abuts against the rupture disk 4. By setting the inner embedded groove 501 and the pressing member 301, the rupture disk 4 is laterally limited to prevent the rupture disk 4 from shifting and affecting the use effect. At the same time, when the pressing member 301 is inserted into the inner embedded groove 501, the sealing performance between the upper clamp 3 and the lower clamp 5 can also be effectively increased.

[0033] It should be added that a notch 502 is formed at the side end of the inner embedded groove 501, and the notch 502 is provided for leading out the connecting piece of the rupture disk 4.

[0034] Further, the pressing unit includes an upper flange 1 and a lower flange 6. The upper clamp 3 and the lower clamp 5 are placed between the upper flange 1 and the lower flange 6, and the upper flange 1 and the lower flange 6 are locked and fixed by a locking member. Exemplarily, in a specific implementation manner, the locking member includes a bolt 8 penetrating through the upper flange 1 and the lower flange 6, and a nut 9 is threadedly connected to one end of the bolt 8. Wherein, through holes for the bolt 8 to penetrate are provided on both the upper flange 1 and the lower flange 6. The upper flange 1 and the lower flange 6 are fixed by the bolt 8 and the nut 9, so as to realize the fixation of the upper clamp 3 and the lower clamp 5, and the stability is high.

[0035] Preferably, sealing gaskets 2 are provided between the upper flange 1 and the upper clamp 3, and between the lower flange 6 and the lower clamp 5, so as to increase the sealing performance of the connection between the upper flange 1 and the upper clamp 3, and between the lower flange 6 and the lower clamp 5.

[0036] Threaded holes 7 are formed on the side walls of the upper clamp 3 and the lower clamp 5. Screws 11 passing through the connecting piece 10 can be threadedly connected to the threaded holes 7. By setting the connecting piece 10, the connection stability of the upper clamp 3 and the lower clamp 5 can be further increased.

[0037] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0038] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pyrolysis furnace pressure relief system, characterized in that, It includes a rupture disk type pressure relief device (111) and an elastic pressure relief device (222); The intake end of the rupture disk type pressure relief device (111) is connected to a control valve. One end of the control valve away from the rupture disk type pressure relief device (111) is installed on the furnace door for controlling the connection or blockage between the inner side of the furnace body and the rupture disk type pressure relief device (111); The elastic pressure relief device (222) is installed on the air bag at the outlet end of the furnace body, on the water seal, or on the connecting pipe between the air bag and the water seal.

2. The pressure relief system of a cracking furnace according to claim 1, characterized in that, The rupture disk type pressure relief device (111) includes a rupture disk (4), and an upper clamp (3) and a lower clamp (5) clamped on both sides of the rupture disk (4); It further includes a pressing unit for fixing the upper clamp (3) and the lower clamp (5).

3. The pressure relief system of a cracking furnace according to claim 2, wherein, An inner embedding groove (501) for placing the rupture disk (4) is formed on the lower clamp (5), and a pressing member (301) is formed on the upper clamp (3). The pressing member (301) can be inserted into the inner embedding groove (501) and abut against the rupture disk (4).

4. A pyrolysis furnace pressure relief system according to claim 2, wherein The pressing unit includes: An upper flange (1) and a lower flange (6). The upper clamp (3) and the lower clamp (5) are placed between the upper flange (1) and the lower flange (6), and the upper flange (1) and the lower flange (6) are locked and fixed by a locking member.

5. The pressure relief system of a cracking furnace according to claim 4, characterized in that, Sealing gaskets (2) are provided between the upper flange (1) and the upper clamp (3), and between the lower flange (6) and the lower clamp (5).

6. The pressure relief system of a cracking furnace according to claim 4, characterized in that, The locking member includes a bolt (8) passing through the upper flange (1) and the lower flange (6), and a nut (9) is threadedly connected to one end of the bolt (8).

7. A pyrolysis furnace pressure relief system according to claim 2, wherein, Threaded holes (7) are formed on the side walls of the upper clamp (3) and the lower clamp (5). Screws (11) passing through the connecting piece (10) can be threadedly connected to the threaded holes (7).

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