Automatic recovery device for low-quality coal gas of blast furnace

Abstract

The utility model discloses a blast furnace low-quality gas automatic recovery device which comprises a blast furnace body and a gas recoverer, a gas pipe is assembled on the side wall of the blast furnace body, and a gas inlet pipe is assembled at the input end of the gas recoverer; a sealing cylinder is assembled between the gas inlet pipe and the gas pipe, a first fixing ring is assembled in the sealing cylinder pair, and a filter screen plate is assembled in the first fixing ring; internal threads are arranged on the inner wall of the sealing cylinder, external threads are arranged on the outer wall of the gas pipe, and the internal threads are matched with the external threads; the blast furnace low-quality gas automatic recovery device is simple in structure and convenient to operate, the sealing cylinder is arranged between the gas inlet pipe of the blast furnace body and the gas inlet pipe of the gas recoverer, assembling is conducted in a threaded connection mode, a filter screen plate in the sealing cylinder is convenient to disassemble, assemble and clean, and therefore the purposes that gas recovery and filtration can be conducted, and the gas recovery efficiency is improved are achieved. And the device can be conveniently disassembled, assembled and cleaned.

Description

Technical Field

[0001] This patent relates to the field of coal gas recovery, specifically an automatic recovery device for low-quality coal gas from blast furnaces. Background Technology

[0002] Converter gas is an important secondary energy source for steel enterprises. Increasing the amount of converter gas recovered can not only effectively reduce the production cost of steelmaking processes and lay the foundation for achieving "negative energy" steelmaking, but also effectively reduce the total amount of pollutant emissions from steel plants and achieve clean production. However, the low-quality, pure gas in the converter needs to be recovered.

[0003] However, existing gas recovery devices still have some shortcomings. For example, gas needs to be filtered during recovery, but the filter screens in traditional gas recovery devices are not easy to disassemble and clean. Therefore, existing technologies need to be improved. Utility Model Content

[0004] In view of the shortcomings of existing technologies, the purpose of this patent is to provide an automatic recovery device for low-quality blast furnace gas.

[0005] The technical solution adopted by this patent to solve its technical problem is: an automatic recovery device for low-quality blast furnace gas, including a blast furnace body and a gas recovery unit, wherein a gas pipe is installed on the side wall of the blast furnace body and an inlet pipe is installed at the input end of the gas recovery unit.

[0006] A sealing cylinder is installed between the air inlet pipe and the gas pipe. A first fixing ring is installed inside the sealing cylinder. A filter screen is installed inside the first fixing ring.

[0007] The inner wall of the sealing cylinder is provided with an internal thread, and the outer wall of the gas pipe is provided with an external thread, and the internal thread and the external thread are matched.

[0008] The top end of the air intake pipe is fitted with a limit ring inside the sealing cylinder, and the inner wall of the first fixing ring is provided with an embedding cavity, and the outer ring of the filter plate is set in the embedding cavity.

[0009] The first fixing ring has mounting screw holes on both sides of its top end, and the outer ring of the filter plate has a mounting screw groove at its top end. Bolt bodies are screwed into the mounting screw holes and mounting screw grooves.

[0010] Furthermore, a fixing block is evenly and equidistantly installed at the bottom end of the first fixing ring along its axis, and an auxiliary ring is installed at the bottom end of the fixing block.

[0011] Furthermore, the first fixing ring and the auxiliary ring have the same diameter, and the outer walls of the first fixing ring and the auxiliary ring are fitted to the inner wall of the sealing cylinder.

[0012] Furthermore, a circular groove is provided at the bottom end of the bolt body, and a bolt rod is installed at the bottom end of the circular groove.

[0013] Furthermore, a second fixing ring is installed on the upper outer end of the bolt rod, and an annular pressure plate, a spring, and an annular rubber sheet are fitted onto the circumferential surface of the bolt rod.

[0014] Furthermore, an extrusion block is installed at the upper edge of the annular rubber sheet, and the outer wall of the bolt body is provided with an arc surface, and the surface of the arc surface is provided with anti-slip texture.

[0015] The beneficial effects of this patent are:

[0016] An automatic recovery device for low-quality blast furnace gas is disclosed. It has a simple structure and is easy to operate. A sealing cylinder is installed between the gas discharge pipe of the blast furnace body and the gas inlet pipe of the gas recovery device. The cylinder is assembled by threaded connection, which facilitates the disassembly and cleaning of the filter screen inside the sealing cylinder. This allows the device to both filter the recovered gas and facilitate its disassembly and cleaning. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this patent.

[0018] Figure 2 This is a schematic diagram of the gas pipe, sealing cylinder, and air inlet pipe of this patent.

[0019] Figure 3 This is a schematic diagram of the first fixing ring of this patent.

[0020] Figure 4 This is a schematic diagram of the bolt body of this patent.

[0021] Explanation of reference numerals in the attached drawings: 1. Blast furnace body; 2. Gas pipe; 3. Sealing cylinder; 4. Gas inlet pipe; 5. Gas recovery device; 6. Limiting ring; 7. First fixing ring; 8. External thread; 9. Internal thread; 10. Filter screen; 11. Embedding cavity; 12. Auxiliary ring; 13. Rubber block; 14. Mounting screw hole; 15. Bolt body; 151. Circular groove; 152. Annular rubber sheet; 153. Bolt rod; 154. Extrusion block; 155. Annular pressure plate; 156. Second fixing ring; 157. Spring; 158. Arc surface. Detailed Implementation

[0022] The present patent is further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the patent. Furthermore, it should be understood that after reading the teachings of this patent, those skilled in the art can make various alterations or modifications to this patent, and these equivalent forms also fall within the scope defined by the appended claims.

[0023] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This is a schematic diagram of the structure of this patent. An automatic blast furnace low-quality gas recovery device includes a blast furnace body 1 and a gas recovery unit 5. A gas pipe 2 is fitted to the side wall of the blast furnace body 1, and an inlet pipe 4 is fitted to the input end of the gas recovery unit 5. A sealing cylinder 3 is fitted between the inlet pipe 4 and the gas pipe 2. A first fixing ring 7 is fitted inside the sealing cylinder 3, and a filter screen plate 10 is fitted inside the first fixing ring 7. An internal thread 9 is provided on the inner wall of the sealing cylinder 3, and an external thread 8 is provided on the outer wall of the gas pipe 2. The internal thread 9 and the external thread 8 are matched. A limit ring 6 is fitted at the top of the inlet pipe 4 inside the sealing cylinder 3. An embedding cavity 11 is opened on the inner wall of the first fixing ring 7, and the outer ring of the filter screen plate 10 is placed inside the embedding cavity 11. Mounting screw holes 14 are opened on both sides of the top of the first fixing ring 7, and a mounting screw groove is opened at the top of the outer ring of the filter screen plate 10. Bolt bodies 15 are screwed into the mounting screw holes 14 and the mounting screw groove.

[0024] In this technical solution, the blast furnace body 1 is a converter in the prior art, and the gas recovery device 5 is a device that can automatically recover coal gas in the prior art (any model is acceptable). The gas inlet pipe 4 at the input end of the gas recovery device 5 is connected to the gas pipe 2 in the blast furnace body 1 through the sealing cylinder 3. The gas pipe 2 and the sealing cylinder 5 are connected by a threaded connection. The limiting ring 6 set at the end of the gas inlet pipe 4 can limit the movement range of the sealing cylinder 5 outside the gas inlet pipe 4. The outer wall of the gas inlet pipe 4 and the inner wall of the opening of the sealing cylinder 5 are interference fit. The inside of the sealing cylinder 5 is equipped with a filter screen plate 10 through the first fixing ring 7 to filter the intake coal gas. The outer edge of the filter screen plate 10 is embedded in the mounting cavity 11, and the mounting screw groove on the first fixing ring 7 corresponds to the mounting screw hole 14 on the first fixing ring 7, so as to be fixed by the bolt body 15.

[0025] In some technical solutions, a fixing block 13 is evenly and equidistantly installed at the bottom end of the first fixing ring 7 along its axis, and an auxiliary ring 12 is installed at the bottom end of the fixing block 13.

[0026] In this technical solution, the bottom end of the first fixing ring 7 is fitted with an auxiliary ring 12 via a fixing block 13, which is made of rubber.

[0027] In some technical solutions, the first fixing ring 7 and the auxiliary ring 12 have the same diameter, and the outer walls of the first fixing ring 7 and the auxiliary ring 12 are fitted to the inner wall of the sealing cylinder 3.

[0028] In this technical solution, both the first fixing ring 7 and the auxiliary ring 12 are made of anti-static material.

[0029] In some technical solutions, a circular groove 151 is provided at the bottom end of the bolt body 15, and a bolt rod 153 is installed at the bottom end of the circular groove 151.

[0030] In this technical solution, the bolt rod 153 is installed into the mounting screw hole 14 and the mounting screw groove for fixation.

[0031] In some technical solutions, a second fixing ring 156 is installed on the upper outer end of the bolt rod 153, and an annular pressure plate 155, a spring 157 and an annular rubber sheet 152 are fitted on the circumferential surface of the bolt rod 153.

[0032] In this technical solution, the annular pressure plate 155 is located above the second fixing ring 156, the spring 157 is located above the annular pressure plate 155, and the annular rubber sheet 152 is located below the second fixing ring 156.

[0033] In some technical solutions, an extrusion block 154 is installed at the upper edge of the annular rubber sheet 152.

[0034] In this technical solution, the annular pressure plate 155 is pressed downward by the spring 157, and the extrusion block 154 is pressed downward by the annular pressure plate 155, so that the extrusion block 154 further extrudes the edge of the annular rubber sheet 152, thereby improving the sealing effect.

[0035] In some technical solutions, the outer wall of the bolt body 15 is provided with an arc surface 158, and the surface of the arc surface 158 is provided with anti-slip texture.

[0036] In use, first, install the filter screen 10 into the mounting cavity 11 inside the first fixing ring 7, then align the mounting screw hole 14 with the mounting screw groove, then screw in the bolt body 15 to fix the filter screen 10, and then connect the air inlet pipe 4 to the sealing cylinder 3. When connecting, move upward by rotating, so that the gas pipe 2 can be connected under the threaded engagement.

[0037] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this patent is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this patent. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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 blast furnace low-quality coal gas automatic recovery device, comprising a blast furnace main body (1) and a coal gas recovery device (5), characterized in that: The side wall of the blast furnace body (1) is equipped with a gas pipe (2), and the input end of the gas collector (5) is equipped with a gas inlet pipe (4); A sealing cylinder (3) is equipped between the gas inlet pipe (4) and the gas pipe (2), the inside of the sealing cylinder (3) is equipped with a first fixed ring (7), and the inside of the first fixed ring (7) is equipped with a filter screen plate (10); The inner wall of the sealing cylinder (3) is provided with an internal thread (9), the outer wall of the gas pipe (2) is provided with an external thread (8), and the internal thread (9) and the external thread (8) are matched; The top end of the gas inlet pipe (4) is equipped with a limiting ring (6) in the inside of the sealing cylinder (3), the inner wall of the first fixed ring (7) is provided with an embedded cavity (11), and the outer ring of the filter screen plate (10) is arranged in the embedded cavity (11); The top end of the first fixed ring (7) is provided with a mounting screw hole (14) on both sides, and the outer ring of the filter screen plate (10) is provided with a mounting screw groove at the top end, and the mounting screw hole (14) and the mounting screw groove are screwed with a bolt body (15).

2. The automatic low-quality coal gas recovery device for blast furnace according to claim 1, characterized in that: The bottom end of the first fixed ring (7) is uniformly and equidistantly mounted with a fixed block (13) along the axis, and the bottom end of the fixed block (13) is mounted with an auxiliary ring (12).

3. The automatic low-quality coal gas recovery device for a blast furnace according to claim 2, characterized in that: The diameter of the first fixed ring (7) and the auxiliary ring (12) is the same, and the outer wall of the first fixed ring (7) and the auxiliary ring (12) is arranged in close contact with the inner wall of the sealing cylinder (3).

4. The automatic low-quality coal gas recovery device for blast furnace according to claim 1, characterized in that: The bottom end of the bolt body (15) is provided with a circular groove (151), and the bottom end of the circular groove (151) is mounted with a bolt rod (153).

5. The automatic low-quality gas recovery device for blast furnace according to claim 4, characterized in that: The outer upper end of the bolt rod (153) is mounted with a second fixed ring (156), and the circumferential surface of the bolt rod (153) is sleeved with an annular pressing piece (155), a spring (157) and an annular rubber sheet (152).

6. The automatic low-quality coal gas recovery device for a blast furnace according to claim 5, characterized in that: The upper end edge of the annular rubber sheet (152) is mounted with a pressing block (154), the outer wall of the bolt body (15) is provided with a circular arc surface (158), and the surface of the circular arc surface (158) is provided with anti-skid lines.

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