Cracking furnace capable of increasing radiation heat absorption

Abstract

The utility model relates to the technical field of heat recovery, in particular to a cracking furnace capable of increasing radiant heat absorption, which comprises a cracking furnace main body, a radiation chamber at the lower end of the cracking furnace main body, a heat recovery chamber at the upper end of the cracking furnace main body, a heat recovery pipe fixedly connected inside the heat recovery chamber, and a right side of the heat recovery pipe penetrating through the heat recovery chamber. A sealing door is arranged at the joint of the cracking furnace body and the right side of the heat recovery pipe, a plurality of fixing plates are connected to the middle of the heat recovery pipe in a sleeved mode, a plurality of heat conduction plates are fixedly connected to the two sides of each fixing plate, a discharge flue is arranged in the middle of each fixing plate, ventilation openings are formed in the two ends of each fixing plate, and a gas guide plate is arranged in the middle of the heat recovery chamber and is hollow. The lower end of the gas guide plate is communicated with the radiation chamber, the gas guide plate is of a Y-shaped structure, and the two ends of the gas guide plate abut against the inner wall of the heat recovery chamber. Heat in smoke can be recovered, and meanwhile the situation that the heat recovery efficiency is reduced by smoke dust in the smoke is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat recovery, in particular to a cracking furnace for increasing radiant heat absorption. Background Technique

[0002] The cracking furnace is divided into a radiation chamber and a convection chamber. The radiation chamber is the area where fuel burns. Furnace tubes are installed therein. Fuel oil is sprayed into the furnace through nozzles to burn. The generated flue gas flows in the radiation chamber to heat the raw material oil in the furnace tubes, so that it reaches the temperature required for cracking. The convection chamber utilizes the waste heat of the flue gas generated after combustion in the radiation chamber to heat the convection tubes in the convection chamber, further recovering heat and improving energy utilization efficiency. The setting of the convection chamber helps to utilize the heat of the flue gas, reduce energy loss at the same time, and improve the energy efficiency of the whole system.

[0003] The existing convection tubes are provided with a large number of metal pipes, and the water flow inside the pipes is heated through the heat conduction characteristics of the metal pipes themselves. Although the structure is simple, the heat recovery rate is low, and the fuel will generate residual soot after combustion. These soot will adhere to the convection tubes, thus affecting the heat conduction of the convection tubes and reducing the heat recovery efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a cracking furnace for increasing radiant heat absorption to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A cracking furnace for increasing radiant heat absorption, including a cracking furnace main body. The lower end of the cracking furnace main body is a radiation chamber, and the upper end of the cracking furnace main body is a heat recovery chamber. A heat recovery pipe is fixedly connected inside the heat recovery chamber. The right side of the heat recovery pipe penetrates through the heat recovery chamber. A sealing door is provided at the connection between the cracking furnace main body and the right side of the heat recovery pipe. A plurality of fixing plates are sleeved in the middle of the heat recovery pipe. A plurality of heat conduction plates are fixedly connected to both sides of the fixing plate. A smoke exhaust duct is provided in the middle of the fixing plate. Ventilation openings are provided at both ends of the fixing plate. A gas guiding plate is provided in the middle of the heat recovery chamber. The inside of the gas guiding plate is hollow. The lower end of the gas guiding plate is communicated with the radiation chamber. The gas guiding plate is in a Y-shaped structure. Both ends of the gas guiding plate abut against the inner wall of the heat recovery chamber. A plurality of cigarette butts are fixedly connected to the upper end of the gas guiding plate. A heating plate is fixedly connected to the side end of the heat recovery pipe. Guide plates are fixedly connected to both sides of the lower end of the fixing plate. The guide plates are inclined.

[0006] Preferably, the fixing plate is in a U-shaped structure, the heat recovery pipe is in a rectangular structure, the two fixing plates are located on both sides of the heat recovery pipe, and the two fixing plates are combined with each other to form a square structure.

[0007] Preferably, two clamping grooves are provided at the upper end of the fixing plate. A connecting plate is provided between the two fixing plates. Both ends of the connecting plate are in an I-shaped structure, and the top end of the connecting plate is clamped in the clamping groove.

[0008] Preferably, the heat conducting plate is inclined, and the size of the heat conducting plate gradually becomes shorter from top to bottom. The two uppermost heat conducting plates of the two fixing plates abut against each other.

[0009] Preferably, an installation opening is provided in the middle of the heat conducting plate. The heating plate is inserted into the installation opening, and the length of the heating plate gradually becomes shorter from top to bottom.

[0010] Preferably, the ventilation opening is located at the connection between the heat conducting plate and the fixing plate. Blocking protrusions are fixedly connected to the inner walls on both sides of the smoke exhaust duct, and the blocking protrusions on the inner walls on both sides of the smoke exhaust duct are arranged in an alternating manner.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: Fixing plates are arranged on both sides of the heat recovery pipe. The heat conducting plate can guide the flue gas and direct the flue gas into the smoke exhaust duct. When the flue gas flows, it will heat the heat conducting plate and the fixing plate. The heat conducting plate and the fixing plate can conduct the heat, thereby recycling and utilizing the heat. When the flue gas flows, its flow rate will be reduced, so that the heat recovery efficiency is higher; The fixing plate is sleeved on the heat recovery pipe, and the fixing plate can be replaced through the sealing door, thereby avoiding the reduction of the heat recovery efficiency caused by the attachment of soot. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the internal connection of the cracking furnace main body.

[0013] Figure 2 It is a schematic diagram of the connection of the reinforcement plate.

[0014] In the figure: 1 cracking furnace main body, 2 radiation chamber, 3 heat recovery chamber, 4 heat recovery pipe, 5 sealing door, 6 air guide plate, 7 spray cigarette head, 8 fixing plate, 9 smoke exhaust duct, 10 heat conducting plate, 11 ventilation opening, 12 guide plate, 13 installation opening, 14 heating plate, 15 blocking protrusion, 16 clamping groove, 17 connecting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] In order to deepen the understanding and recognition of the present utility model below, the technical solutions in the embodiments of the present utility model will be clearly and completely described and introduced with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments, and no any formal limitation is imposed on this embodiment. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] Please refer to Figure 1-2 , the present utility model provides a technical solution: a cracking furnace for increasing radiant heat absorption, including a cracking furnace main body 1, the lower end of the cracking furnace main body 1 is a radiation chamber 2, the upper end of the cracking furnace main body 1 is a heat recovery chamber 3, a heat recovery pipe 4 is fixedly connected inside the heat recovery chamber 3, the right side of the heat recovery pipe 4 penetrates through the heat recovery chamber, a sealing door 5 is provided at the connection between the cracking furnace main body 1 and the right side of the heat recovery pipe 4, a plurality of fixing plates 8 are sleeved in the middle of the heat recovery pipe 4, a plurality of heat conducting plates 10 are fixedly connected to both sides of the fixing plate 8, a smoke exhaust duct 9 is provided in the middle of the fixing plate 8, ventilation openings 11 are provided at both ends of the fixing plate 8, a gas guiding plate 6 is provided in the middle of the heat recovery chamber 3, the inside of the gas guiding plate 6 is hollow, the lower end of the gas guiding plate 6 is communicated with the radiation chamber 2, the gas guiding plate 6 is in a Y-shaped structure, both ends of the gas guiding plate 6 abut against the inner wall of the heat recovery chamber 3, and a plurality of cigarette spraying heads 7 are fixedly connected to the upper end of the gas guiding plate 6. A heating plate 14 is fixedly connected to the side end of the heat recovery pipe 4, and guiding plates 12 are fixedly connected to both sides of the lower end of the fixing plate 8. The guiding plates 12 are inclined. The radiation chamber 2 cracks the raw material, and the generated flue gas reaches the heat recovery chamber 3 through the gas guiding plate 6. The guiding plates 12 can guide the flue gas so that the flue gas can reach the middle position between the two fixing plates 8.

[0017] The fixing plate 8 is in a U-shaped structure, the heat recovery pipe 4 is in a rectangular structure, the two fixing plates 8 are located on both sides of the heat recovery pipe 4, and the two fixing plates 8 are combined with each other to form a square-shaped structure. Two clamping grooves 16 are provided at the upper end of the fixing plate 8. A connecting plate 17 is provided between the two fixing plates 8. Both ends of the connecting plate 17 are in an I-shaped structure. The top end of the connecting plate 17 is clamped in the clamping groove 16. The two fixing plates 8 are sleeved on the heat recovery pipe 4 and then fixed by the connecting plate 17, so that all the fixing plates 8 can be connected into a whole, which is convenient for subsequently taking out the fixing plates 8 from the sealing door 5 and replacing the fixing plates 8 to avoid the reduction of heat recovery efficiency caused by the adhesion of soot.

[0018] The heat conducting plate 10 is inclined, and the size of the heat conducting plate 10 gradually becomes shorter from top to bottom. The two uppermost heat conducting plates 10 of the two fixing plates 8 abut against each other. An installation opening 13 is provided in the middle of the heat conducting plate 10, and the heating plate 14 is inserted into the installation opening 13. The length of the heating plate 14 gradually becomes shorter from top to bottom. The heat conducting plate 10 can block and guide the flue gas, so as to make full use of the flue gas. When the flue gas flows, it heats the heat conducting plate 10 and the heating plate 14.

[0019] The vent 11 is located at the connection between the heat conducting plate 10 and the fixed plate 8. Blocking protrusions 15 are fixedly connected to the inner walls on both sides of the smoke exhaust duct 9. The blocking protrusions 15 on the inner walls on both sides of the smoke exhaust duct 9 are arranged in an alternating manner. The blocking protrusions 15 can block the flowing smoke, reduce the flow rate of the smoke, and ensure the heat recovery efficiency. When the smoke flows in the smoke exhaust duct 9, it can heat the fixed plate 8, and the fixed plate 8 can also block the smoke to prevent the soot in the smoke from adhering to the connection between the fixed plate 8 and the heat recovery pipe 4, thereby ensuring the heat recovery efficiency.

[0020] Although the embodiments of the present invention have been shown and described, it should be emphasized that the above description is only an introduction and description of the usage mode of the embodiments of the present invention, and does not impose any formal restrictions on the present invention. For those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cracking furnace for increasing radiant heat absorption, comprising a cracking furnace body (1), characterized in that: The lower end of the cracking furnace body (1) is a radiation chamber (2), and the upper end of the cracking furnace body (1) is a heat recovery chamber (3). A heat recovery pipe (4) is fixedly connected to the interior of the heat recovery chamber (3). The right side of the heat recovery pipe (4) passes through the heat recovery chamber. A sealing door (5) is provided at the connection between the cracking furnace body (1) and the right side of the heat recovery pipe (4). A plurality of fixed plates (8) are sleeved in the middle of the heat recovery pipe (4). A plurality of heat conducting plates (10) are fixedly connected to both sides of the fixed plate (8). A smoke exhaust duct (9) is provided in the middle of the fixed plate (8). ) are provided with air vents (11) at both ends, an air guide plate (6) is provided in the middle of the heat recovery chamber (3), the air guide plate (6) is hollow inside, the lower end of the air guide plate (6) is connected to the radiation chamber (2), the air guide plate (6) is a Y-shaped structure, the two ends of the air guide plate (6) are against the inner wall of the heat recovery chamber (3), the upper end of the air guide plate (6) is fixedly connected to a plurality of smoke nozzles (7), the side ends of the heat recovery pipe (4) are fixedly connected to a heating plate (14), and the lower ends of the fixed plate (8) are fixedly connected to guide plates (12), and the guide plates (12) are arranged at an angle.

2. A cracking furnace with increased radiation heat absorption according to claim 1, characterized in that: The fixing plate (8) is a U-shaped structure, the heat recovery pipe (4) is a rectangular structure, the two fixing plates (8) are located on both sides of the heat recovery pipe (4), and the two fixing plates (8) are combined with each other to form a U-shaped structure.

3. A cracking furnace with increased radiation heat absorption according to claim 1, characterized in that: Two clamping grooves (16) are provided at the upper end of the fixing plate (8), a connecting plate (17) is provided between the two fixing plates (8), both ends of the connecting plate (17) are I-shaped structures, and the top end of the connecting plate (17) is clamped in the clamping groove (16).

4. A cracking furnace with increased radiant heat absorption according to claim 1, characterized in that: The heat conducting plates (10) are arranged at an angle, and the size of the heat conducting plates (10) gradually becomes shorter from top to bottom, and the two uppermost heat conducting plates (10) of the two fixing plates (8) are pressed against each other.

5. A cracking furnace with increased radiation heat absorption according to claim 1, characterized in that: A mounting opening (13) is provided in the middle of the heat conducting plate (10), and the heating plate (14) is plugged into the mounting opening (13), with the length of the heating plate (14) gradually becoming shorter from top to bottom.

6. A cracking furnace with increased radiation heat absorption according to claim 1, characterized in that: The vent (11) is located at the connection between the heat conducting plate (10) and the fixing plate (8), and blocking protrusions (15) are fixedly connected to the inner walls on both sides of the smoke exhaust duct (9), and the blocking protrusions (15) on the inner walls on both sides of the smoke exhaust duct (9) are arranged in an interlaced manner.

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