A stable pressure recovery device for blast furnace gas pipeline

Abstract

This application relates to the field of blast furnace gas pressure stabilization technology and discloses a pressure stabilization and recovery device for blast furnace gas pipelines, including a cylindrical shell and a dispersion shell disposed inside the cylindrical shell. A conical shell is welded to one side of the cylindrical shell, and a gas outlet pipe is welded to the side of the conical shell away from the cylindrical shell. The inclined dispersion holes opened on the dispersion shell can play a role in the inclined output of gas, which facilitates the inclined output of gas into the interior of the cylindrical shell and the spiral grooves on the inner walls of the cylindrical shell and the conical shell. The spiral grooves can guide and constrain the flow of gas, making the gas flow more orderly, making the pressure distribution of gas in the pressure stabilization chamber more uniform, reducing the occurrence of turbulence, thereby reducing flow resistance, avoiding local pressure too high or too low, realizing a smooth transition of pressure gradient, further improving pressure stabilization performance, and reducing energy consumption of gas during the flow process.

Description

Technical Field

[0001] This application relates to the field of blast furnace gas pressure stabilization technology, specifically a pressure stabilization and recovery device for blast furnace gas pipelines. Background Technology

[0002] Blast furnace smelting is a crucial step in steel production. During the reduction and smelting of molten iron from iron ore, blast furnace gas is produced as a byproduct. If released, it would cause air pollution and energy waste. Utilizing this gas in a boiler for combustion allows the heat from the combustion to heat water and generate steam, which drives the first-stage high-pressure impeller of a steam turbine. The steam, after performing work, is then recycled back into the boiler for reheating, driving the second-stage low-pressure impeller. The rotation of both impellers drives a generator set to produce electricity. This energy-saving power generation project, which uses blast furnace gas to generate ultra-high temperature, ultra-high pressure, and low steam consumption, will save on coal costs, create economic benefits, and avoid energy waste and air pollution.

[0003] Currently, its pressure stabilizing mechanism uses a dispersion hole on the circumferential surface of the dispersion disk to facilitate the delivery of gas into the inner shell. The front end of the outer shell is cylindrical and the rear end is conical, which facilitates the stabilization of the gas. However, the gas flows in a straight line when it enters the outer shell, which can easily cause turbulence in the pressure stabilizing chamber inside the outer shell, resulting in energy loss. Utility Model Content

[0004] The purpose of this application is to provide a pressure stabilizing and recovery device for blast furnace gas pipelines, which solves the problem proposed in the background technology where the pressure stabilizing mechanism uses a dispersion plate with dispersion holes on the circumferential surface to facilitate the delivery of gas into the inner shell. The front end of the outer shell is cylindrical and the rear end is conical to facilitate gas pressure stabilization. However, the gas flows in a straight line into the outer shell, which easily leads to turbulence in the pressure stabilizing chamber inside the outer shell, resulting in energy loss.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This application provides a pressure stabilizing and recovery device for blast furnace gas pipelines, including a cylindrical shell and a dispersion shell disposed inside the cylindrical shell. A conical shell is welded to one side of the cylindrical shell, and a gas outlet pipe is welded to the side of the conical shell away from the cylindrical shell. The inner walls of the conical shell and the cylindrical shell are respectively provided with spiral grooves, and the two sets of corresponding spiral grooves are interconnected. A shell cover is fixedly installed on the side of the dispersion shell near the conical shell, and multiple sets of inclined dispersion holes are opened on the outer circumferential wall of the dispersion shell.

[0007] By adopting the above technical solution, the inclined dispersion holes opened on the dispersion shell can play a role in the inclined output of gas, which facilitates the inclined output of gas into the interior of the cylindrical shell and the spiral grooves on the inner wall of the cylindrical and conical shells. The spiral grooves can guide and constrain the flow of gas, making the gas flow more orderly, making the pressure distribution of gas in the pressure stabilizing chamber more uniform, reducing the occurrence of turbulence, thereby reducing flow resistance, avoiding local pressure that is too high or too low, achieving a smooth transition of pressure gradient, further improving pressure stabilization performance, and reducing energy consumption of gas during the flow process.

[0008] Optionally, multiple sets of multi-section telescopic rods are fixedly installed on the inner wall of the shell cover. The telescopic ends of the multiple sets of multi-section telescopic rods are jointly fixedly installed with a piston plate. A spring is respectively sleeved on the outer wall of each set of multi-section telescopic rods. One end of the spring abuts against the inner wall of the shell cover, and the other end of the spring abuts against the inner wall of the piston plate.

[0009] By adopting the above technical solution, the shell cover can fix the multi-section telescopic rod, the multi-section telescopic rod can guide the spring, and the spring can provide resistance and reset for the piston plate.

[0010] Optionally, a cover sealing ring is bonded to the inner wall of the shell cover, the cover sealing ring is fitted to the inner wall of the dispersion shell, and a sealing groove is formed on the outer circumferential wall of the piston plate, and a piston sealing ring is fitted on the inner wall of the piston plate inside the sealing groove.

[0011] By adopting the above technical solution, the piston sealing ring can seal the piston plate and the dispersion shell, and the cover sealing ring can seal the shell cover and the dispersion shell.

[0012] Optionally, a retaining ring is welded to the outer wall of the cylindrical shell, and a mounting plate is fixedly installed on the side of the retaining ring away from the conical shell.

[0013] By adopting the above technical solution, the cylindrical shell can fix the fixing ring, and the fixing ring can fix the mounting plate.

[0014] Optionally, an air inlet pipe is welded to the inner ring wall of the mounting plate, and the air inlet pipe is welded to the outer wall of the dispersion shell.

[0015] By adopting the above technical solution, the mounting plate can fix the air intake pipe, and the air intake pipe can fix the dispersion shell.

[0016] Optionally, a second flange is welded to the side of the air inlet pipe away from the dispersion shell.

[0017] By adopting the above technical solution, the air inlet pipe can be used to fix the second flange, and the second flange can be connected to the air supply pipe of external equipment.

[0018] Optionally, a first flange is welded to the side of the intake pipe away from the conical housing.

[0019] By adopting the above technical solution, the first flange can be used to connect the intake pipe to the exhaust pipe of external equipment.

[0020] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0021] 1. The technical solution of this application utilizes the inclined dispersion holes on the dispersion shell to facilitate the inclined output of gas into the cylindrical shell, and to facilitate the gas entering the spiral grooves on the inner walls of the cylindrical and conical shells. The spiral grooves guide and constrain the flow of gas, making the gas flow more orderly. This results in a more uniform pressure distribution of gas in the pressure stabilizing chamber, reducing turbulence and flow resistance. It also prevents local pressure from being too high or too low, achieves a smooth transition of the pressure gradient, further improves the pressure stabilizing performance, and reduces the energy consumption of gas during the flow process.

[0022] 2. The multi-section telescopic rod and spring allow the piston plate to move, thereby adjusting the output size of the dispersion orifice according to the different gas inlet pressures. This ensures that the gas has sufficient pressure to supply the subsequent system, guaranteeing the safe and stable operation of the entire gas recovery system. Furthermore, the spring, multi-section telescopic rod, and piston plate are easy to replace and maintain due to the detachable cover. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is an axial view schematic diagram of a pressure stabilizing and recovery device for blast furnace gas pipelines according to this application;

[0025] Figure 2 This is a front cross-sectional view of a pressure stabilizing and recovery device for blast furnace gas pipelines according to this application;

[0026] Figure 3 This application discloses a pressure stabilizing and recovery device for blast furnace gas pipelines. Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 This is a right-side view schematic diagram of the dispersion shell of a pressure stabilizing and recovery device for blast furnace gas pipelines according to this application.

[0028] In the diagram: 1. Cylindrical shell; 2. Conical shell; 3. Exhaust pipe; 4. Dispersion shell; 5. Shell cover; 6. Dispersion hole; 7. Inlet pipe; 8. Spiral groove; 9. Cover sealing ring; 10. Multi-section telescopic rod; 11. Spring; 12. Piston plate; 13. Piston sealing ring; 14. Sealing groove; 15. First flange; 16. Fixing ring; 17. Mounting plate; 18. Second flange. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figure 1-4 This application provides a technical solution: a pressure stabilizing and recovery device for blast furnace gas pipeline, including a cylindrical shell 1 and a dispersion shell 4 disposed inside the cylindrical shell 1. A conical shell 2 is welded to one side of the cylindrical shell 1, and a gas outlet pipe 3 is welded to the side of the conical shell 2 away from the cylindrical shell 1. Spiral grooves 8 are respectively opened on the inner walls of the conical shell 2 and the cylindrical shell 1, and the two sets of corresponding spiral grooves 8 are interconnected. A shell cover 5 is fixedly installed on the side of the dispersion shell 4 near the conical shell. Multiple sets of inclined dispersion holes 6 are opened on the outer circumferential wall of the dispersion shell 4.

[0031] In the technical solution of this application, the inclined dispersion holes 6 opened on the dispersion shell 4 can play the role of inclined output of gas, which facilitates the inclined output of gas into the interior of the cylindrical shell 1 and the spiral grooves 8 on the inner wall of the cylindrical shell 1 and the conical shell 2. The spiral grooves 8 can guide and constrain the flow of coal gas, making the flow of coal gas more orderly, making the pressure distribution of coal gas in the pressure stabilizing chamber more uniform, reducing the occurrence of turbulence, thereby reducing flow resistance, avoiding local pressure too high or too low, realizing a smooth transition of pressure gradient, further improving pressure stabilization performance, and reducing energy consumption of coal gas during the flow process.

[0032] In the technical solution of this application, such as Figure 1 and Figure 2As shown, a fixing ring 16 is welded to the outer wall of the cylindrical shell 1. A mounting plate 17 is fixedly installed on the side of the fixing ring 16 away from the conical shell 2. The cylindrical shell 1 can fix the fixing ring 16, and the fixing ring 16 can fix the mounting plate 17. An air inlet pipe 7 is welded to the inner wall of the mounting plate 17. The air inlet pipe 7 is welded to the outer wall of the dispersion shell 4. The mounting plate 17 can fix the air inlet pipe 7, and the air inlet pipe 7 can fix the dispersion shell 4. A second flange 18 is welded to the side of the air inlet pipe 7 away from the dispersion shell 4. The air inlet pipe 7 can fix the second flange 18. The second flange 18 can be connected to the air supply pipe of external equipment. A first flange 15 is welded to the side of the air inlet pipe 7 away from the conical shell 2. The first flange can be used to connect the air inlet pipe 7 to the exhaust pipe of external equipment.

[0033] In the technical solution of this application, such as Figure 2 and Figure 3 As shown, multiple sets of multi-section telescopic rods 10 are fixedly installed on the inner wall of the cover 5. The telescopic ends of the multiple sets of multi-section telescopic rods 10 are all fixedly installed with piston plates 12. Each set of multi-section telescopic rods 10 has a spring 11 sleeved on its outer wall. One end of the spring 11 abuts against the inner wall of the cover 5, and the other end of the spring 11 abuts against the inner wall of the piston plate 12. The cover 5 can fix the multi-section telescopic rods 10, and the multi-section telescopic rods 10 can guide the springs 11. The springs 11 can provide resistance and reset for the piston plate 12. A cover sealing ring 9 is bonded to the inner wall of the cover 5. The cover sealing ring 9 fits against the inner wall of the dispersion shell 4. A sealing groove 14 is opened on the outer circumference of the piston plate 12. A piston sealing ring 13 is sleeved on the inner wall of the piston plate 12 inside the sealing groove 14. The piston sealing ring 13 can seal the piston plate 12 and the dispersion shell 4. The cover sealing ring 9 can also seal the cover 5 and the dispersion shell 4.

[0034] In use, the second flange 18 allows connection to the gas supply pipe of external equipment, while the first flange connects the inlet pipe 7 to the exhaust pipe of external equipment. Gas then enters the dispersion shell 4. The inclined dispersion holes 6 on the dispersion shell 4 allow for inclined gas output, facilitating the inclined output of gas into the cylindrical shell 1. The spiral grooves 8 on the inner walls of the cylindrical shell 1 and conical shell 2 also facilitate gas entry. These spiral grooves guide and constrain the flow of gas, making it more orderly and resulting in a more uniform pressure distribution within the pressure stabilizing chamber, reducing turbulence. The occurrence of the phenomenon reduces flow resistance, avoids excessively high or low local pressure, achieves a smooth transition of pressure gradient, further improves pressure stabilization performance, reduces energy consumption of gas during flow, and the multi-section telescopic rod 10 and spring 11 can move the piston plate 12, thereby adjusting the output size of the dispersion hole 6 according to different gas inlet pressures, ensuring that the gas has sufficient pressure to supply the subsequent system, ensuring the safe and stable operation of the entire gas recovery system, and the spring 11, multi-section telescopic rod 10 and piston plate 12 are easy to replace and maintain due to the detachable installation feature of the cover 5.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pressure stabilizing and recovering device for a blast furnace gas pipeline, characterized by: It includes a cylindrical shell (1) and a dispersion shell (4) disposed inside the cylindrical shell (1). A conical shell (2) is welded to one side of the cylindrical shell (1). An air outlet pipe (3) is welded to the side of the conical shell (2) away from the cylindrical shell (1). The inner walls of the conical shell (2) and the cylindrical shell (1) are respectively provided with spiral grooves (8), and the two sets of spiral grooves (8) are interconnected. A shell cover (5) is fixedly installed on the side of the dispersion shell (4) near the conical shell. Multiple sets of inclined dispersion holes (6) are opened on the outer circumference of the dispersion shell (4).

2. The pressure stabilizing and recovery device for blast furnace gas pipelines according to claim 1, characterized in that, The inner wall of the shell cover (5) is fixedly installed with multiple sets of multi-section telescopic rods (10). The telescopic ends of the multiple sets of multi-section telescopic rods (10) are fixedly installed with piston plates (12). The outer wall of each set of multi-section telescopic rods (10) is respectively fitted with springs (11). One end of the spring (11) abuts against the inner wall of the shell cover (5), and the other end of the spring (11) abuts against the inner wall of the piston plate (12).

3. A pressure stabilizing and recovery device for blast furnace gas pipelines according to claim 2, characterized in that, The inner wall of the shell cover (5) is bonded with a cover sealing ring (9), the cover sealing ring (9) is attached to the inner wall of the dispersion shell (4), the outer circumferential wall of the piston plate (12) is provided with a sealing groove (14), and the inner wall of the piston plate (12) located inside the sealing groove (14) is fitted with a piston sealing ring (13).

4. A pressure stabilizing and recovery device for blast furnace gas pipelines according to claim 1, characterized in that, A fixing ring (16) is welded to the outer wall of the cylindrical shell (1), and an mounting plate (17) is fixedly installed on the side of the fixing ring (16) away from the conical shell (2).

5. A pressure stabilizing and recovery device for blast furnace gas pipelines according to claim 4, characterized in that, An air inlet pipe (7) is welded to the inner ring wall of the mounting plate (17), and the air inlet pipe (7) is welded to the outer wall of the dispersion shell (4).

6. A pressure stabilizing and recovery device for blast furnace gas pipelines according to claim 5, characterized in that, The intake pipe (7) is welded with a second flange (18) on the side away from the dispersion shell (4).

7. A pressure stabilizing and recovery device for blast furnace gas pipelines according to claim 6, characterized in that, The intake pipe (7) has a first flange (15) welded to the side away from the conical shell (2).

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