Blast furnace top pressure equalizing control equipment
Through the design of the top pressure equalization control equipment for blast furnace furnace, the pressure equalization and pressure relief problems during gas recovery during blast furnace ironmaking are solved, and automated gas collection and cleaning are realized, improving the convenience and cleanliness of gas collection.
Patent Information
- Application Number
- CN202422291562.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the prior art, during blast furnace iron smelting, pressure equalization and pressure relief treatment cannot be carried out in a timely and effective manner during gas recovery, resulting in reduced gas collection convenience and serious resource waste and pollution.
A blast furnace top equalization control device is designed, including a flow guide sleeve, top connecting pipe, internal moving pipe, compression spring, sealing ring and exhaust through holes. It automatically realizes pressure equalization and exhaust through the gas pressure, and the gas concentrated through the gas collection cover and rubber bonding board enters the internal moving pipe. Combined with the air pump and diffusion cover, the driving blade rotates for automatic pressure relief and cleaning, and the support ring, filter cartridge and filter are used for gas filtration.
The automatic pressure equalization and pressure relief of the blast furnace top gas is realized, which improves the convenience of gas collection, reduces manual burden, ensures clean gas discharge, and avoids pollution.
Smart Images
Figure CN223176131U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of blast furnace gas recovery, in particular to a blast furnace top pressure equalization control device. Background Art
[0002] The long-term gas emissions associated with normal blast furnace ironmaking production consist of two parts: one is the gas discharged from the charge tank during top charging, known as equalizing gas; the other is the gas discharged from the top of the blast furnace during chemical reactions with the raw materials in the blast furnace, known as top gas. The equalizing gas from the top of the furnace is usually discharged directly into the atmosphere after passing through a muffler. The amount of gas discharged through the equalizing pressure of the blast furnace top alone exceeds 4 billion cubic meters, causing significant waste of resources and serious atmospheric pollution. Furthermore, the gas itself has great economic value, so equalizing pressure control of the blast furnace top is required during the steelmaking process to facilitate gas recovery.
[0003] At present, the coal gas recovery process is realized through active collection. When the gas pressure in the furnace is high, although there is an overpressure alarm prompt, when the furnace is over-pressurized, it is impossible to promptly and effectively perform pressure equalization and discharge pressure relief treatment, so that the coal gas cannot be discharged quickly when over-pressurized, reducing the convenience of coal gas collection at the top of the blast furnace. Utility Model Content
[0004] The utility model provides a blast furnace top pressure equalizing control device, which can effectively solve the problem raised in the above background technology that in the current process of coal gas recovery, it is all achieved through active collection. When the gas pressure in the furnace is relatively high, although there is currently a means of overpressure alarm prompt, when the furnace is overpressured, it is impossible to promptly and effectively perform pressure equalization and discharge pressure relief processing, so that the coal gas cannot be quickly discharged when overpressure occurs, which reduces the convenience of collecting the blast furnace top coal gas.
[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a blast furnace top equalizing pressure control device for use, comprising a blast furnace top charging tank, the top gas outlet end of the blast furnace top charging tank is connected to a guide sleeve, the end of the guide sleeve is connected to an air guide pipe, the end of the air guide pipe is connected to an air pump, and the air outlet end of the air pump is connected to a pressure-equalizing gas storage tank through the air guide pipe, and the bottom side of the pressure-equalizing gas storage tank is connected to an exhaust pipe;
[0006] The top of the blast furnace top material tank is fixedly connected with a top connecting pipe, the guide sleeve is sleeved on the outer side of the top connecting pipe, and the inner side of the top connecting pipe is embedded and sleeved with an internal moving pipe, the top of the internal moving pipe is fixedly connected with a compression spring, a sealing ring is provided at the contact position between the top edge of the internal moving pipe and the inner wall of the top connecting pipe, and exhaust holes are opened at corresponding positions on the edges of the top connecting pipe and the internal moving pipe;
[0007] The bottom edge of the inner moving pipe is connected with a gas collecting hood, and a rubber fitting plate is connected at the corresponding position between the edge end of the gas collecting hood and the top of the blast furnace top bunker.
[0008] Preferably, the diversion casing is detachably connected to the top of the blast furnace top bunker through an intake flange, a gap is provided between the diversion casing and the top connecting pipe, and the top of the inner moving pipe is connected to the inner top wall of the compression spring.
[0009] Preferably, the top of the blast furnace top bunker is conical, and the edge end of the rubber fitting plate is closely attached to the conical surface inside the top of the blast furnace top bunker;
[0010] When the gas collecting hood is pushed by the inner moving pipe to the position where it contacts the bottom of the top connecting pipe, the positions of the top connecting pipe and the exhaust through holes inside the inner moving pipe correspond to each other, and the sizes of the exhaust through holes opened inside the top connecting pipe and the inner moving pipe are the same.
[0011] Preferably, the air outlet end of the gas guide pipe is connected with a diffusion hood at the inner top position of the equalizing gas storage tank. A fixed bracket is fixedly installed at the inner top edge of the equalizing gas storage tank. A limit bearing is installed in the middle of the fixed bracket, and a rotating shaft is rotatably connected to the inside of the limit bearing. A driving blade is arranged at the top of the rotating shaft corresponding to the diffusion hood. A connecting rod is connected to the bottom edge of the rotating shaft, and a cleaning strip is connected to the end of the connecting rod;
[0012] A support ring is installed at the inner bottom of the equalizing gas storage tank. A filter cylinder is fitted and clamped at the position above the support ring inside the equalizing gas storage tank. A filter screen is arranged inside the filter cylinder.
[0013] Preferably, the connecting rod drives the cleaning strip at its end to rotate, and the edge of the cleaning strip is in close contact with the inner wall of the equalizing gas storage tank. The top of the equalizing gas storage tank is detachably connected with a tank cover.
[0014] Preferably, the edge of the filter cylinder is in close contact with the inner wall of the equalizing gas storage tank. Two groups of filter screens are embedded and clamped inside the filter cylinder, and the pore diameters of the two groups of filter screens inside the filter cylinder are different, and the position of the filter cylinder is higher than the exhaust pipe.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The structure of the present utility model is scientific and reasonable, and it is safe and convenient to use:
[0016] 1. By providing a diversion sleeve, a top connecting pipe, an internal moving pipe, a compression spring, a sealing ring, and an exhaust through-hole at the top of the charging hopper of the blast furnace, when the pressure inside the blast furnace is relatively high, the gas pressure can counteract the internal moving pipe, thereby squeezing the compression spring. As a result, the exhaust through-hole opened at the edge of the internal moving pipe coincides with the exhaust through-hole at the edge of the top connecting pipe, facilitating the discharge of the gas inside the blast furnace from the inside of the top connecting pipe and the internal moving pipe, thus achieving automatic pressure equalization and exhaust.
[0017] Moreover, by using a gas collecting hood and a rubber fitting plate, gases such as coal gas inside the furnace can enter the internal moving pipe more concentratedly, facilitating automatic pressure equalization according to the gas pressure inside the furnace. And when the pressure is relatively high, automatic pressure equalization and pressure relief are achieved, improving the automation degree of exhaust and reducing the manual burden.
[0018] 2. The pressure equalizing gas storage tank facilitates the collection of gases. At the same time, by using a diffusion hood, when the discharged pressurized gas enters the pressure equalizing gas storage tank, it can drive the driving blade to rotate. Cooperating with a fixed support, a rotating shaft, a limit bearing, a connecting rod, and a cleaning strip, the rotating shaft and the connecting rod can be synchronously driven to rotate during the rotation of the driving blade, enabling the cleaning strip to scrape along the inner wall of the pressure equalizing gas storage tank, realizing the cleaning of the inner wall of the pressure equalizing gas storage tank and avoiding the accumulation of ash and slag and the phenomenon of uncleanability on the inner wall of the pressure equalizing gas storage tank.
[0019] Meanwhile, through a support ring, a filter cartridge, and a filter screen, the gas can be filtered during the gas collection process, making the gas cleaner when it is subsequently discharged through the exhaust pipe, and avoiding the pollution of the atmospheric environment caused by the direct discharge of impurities in the gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation to the present invention.
[0021] In the drawings:
[0022] Figure 1 is a schematic structural diagram of the present invention;
[0023] Figure 2 is a cross-sectional view of the charging hopper of the blast furnace of the present invention;
[0024] Figure 3 is a schematic connection structure diagram of the top connecting pipe of the present invention;
[0025] Figure 4 is a schematic structural diagram of the gas collecting hood of the present invention;
[0026] Figure 5 is a schematic diagram of the internal structure of the pressure-equalizing gas storage tank of the present utility model;
[0027] Reference numerals in the figure: 1, blast furnace top bunker; 2, diversion sleeve; 3, gas guide pipe; 4, air extraction pump; 5, pressure-equalizing gas storage tank; 6, exhaust pipe; 7, top connecting pipe; 8, internal moving pipe; 9, compression spring; 10, sealing ring; 11, exhaust through hole; 12, gas collecting hood; 13, rubber bonding plate; 14, diffusion hood; 15, fixed bracket; 16, rotating shaft; 17, driving blade; 18, limit bearing; 19, connecting rod; 20, cleaning strip; 21, support ring; 22, filter cartridge; 23, filter screen. Specific embodiments
[0028] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not used to limit the present utility model.
[0029] Embodiment: As Figures 1-5 shown, the present utility model provides a technical solution, a pressure-equalizing control device for the blast furnace top, including a blast furnace top bunker 1. The top air outlet end of the blast furnace top bunker 1 is connected to a diversion sleeve 2. The end of the diversion sleeve 2 is connected to a gas guide pipe 3. The end of the gas guide pipe 3 is connected to an air extraction pump 4. And the air outlet end of the air extraction pump 4 is connected to the pressure-equalizing gas storage tank 5 through the gas guide pipe 3. One side of the bottom of the pressure-equalizing gas storage tank 5 is connected to an exhaust pipe 6;
[0030] The top of the blast furnace top bunker 1 is fixedly connected to a top connecting pipe 7. The diversion sleeve 2 is sleeved outside the top connecting pipe 7. And an internal moving pipe 8 is embedded and sleeved inside the top connecting pipe 7. The top of the internal moving pipe 8 is fixedly connected to a compression spring 9. The diversion sleeve 2 is detachably connected to the top of the blast furnace top bunker 1 through an intake flange. There is a gap between the diversion sleeve 2 and the top connecting pipe 7. The top of the internal moving pipe 8 is connected to the inner top wall of the compression spring 9, which is convenient for the connection of the diversion sleeve 2 and at the same time convenient for the discharge of gas. A sealing ring 10 is provided at the contact position between the top edge of the internal moving pipe 8 and the inner wall of the top connecting pipe 7. Exhaust through holes 11 are opened at the corresponding positions on the sides of the top connecting pipe 7 and the internal moving pipe 8;
[0031] The bottom edge of the internal moving pipe 8 is connected to an air collecting hood 12. When the air collecting hood 12 is pushed by the internal moving pipe 8 to the contact position with the bottom of the top connecting pipe 7, the top connecting pipe 7 corresponds to the position of the exhaust through-hole 11 inside the internal moving pipe 8, and the exhaust through-hole 11 opened in the top connecting pipe 7 and the internal moving pipe 8 is the same size, which is convenient for the gas in the blast furnace to be discharged from the inside of the top connecting pipe 7 and the internal moving pipe 8, thereby realizing automatic pressure-equalizing exhaust, and the edge of the air collecting hood 12 is connected to a rubber plywood 13 at the corresponding position of the top of the blast furnace top material tank 1, and the top of the blast furnace top material tank 1 is set to be conical, and the edge of the rubber plywood 13 is tightly fitted with the conical surface on the inner side of the top of the blast furnace top material tank 1, so that the coal gas and other gases in the furnace can enter the interior of the internal moving pipe 8 more concentratedly, thereby facilitating automatic pressure-equalizing treatment according to the air pressure in the furnace.
[0032] The gas outlet end of the air guide pipe 3 is located at the top position of the inner side of the equalizing gas storage tank 5 and is connected to a diffusion cover 14. A fixing bracket 15 is fixedly installed on the inner top edge of the equalizing gas storage tank 5. A limited bearing 18 is installed in the middle of the fixing bracket 15, and the inner side of the limited bearing 18 is rotatably connected to a rotating shaft 16. A driving blade 17 is provided at the top of the rotating shaft 16 corresponding to the diffusion cover 14. A connecting rod 19 is connected to the bottom edge of the rotating shaft 16, and a cleaning strip 20 is connected to the end of the connecting rod 19. The connecting rod 19 drives the cleaning strip 20 at its end to rotate, and the edge of the cleaning strip 20 is in close contact with the inner wall of the equalizing gas storage tank 5. The top of the equalizing gas storage tank 5 is detachably connected to a tank cover, which is convenient for scraping the inner wall of the equalizing gas storage tank 5 by rotating the cleaning strip 20 to clean it.
[0033] A support ring 21 is installed at the bottom of the inner side of the equalizing gas storage tank 5, and a filter cartridge 22 is fitted and snapped into place at the top of the support ring 21 on the inner side of the equalizing gas storage tank 5. A filter screen 23 is provided on the inner side of the filter cartridge 22. The edge of the filter cartridge 22 fits tightly against the inner wall of the equalizing gas storage tank 5, and two groups of filter screens 23 are embedded and snapped into place on the inner side of the filter cartridge 22. The mesh diameters of the two groups of filter screens 23 on the inner side of the filter cartridge 22 are different, and the position of the filter cartridge 22 is higher than the exhaust pipe 6, which facilitates the tight snap-on installation of the filter cartridge 22 and facilitates filtering of the gas.
[0034] The working principle and use process of the utility model: In actual application of the blast furnace top equalizing pressure control device, the blast furnace top charging tank 1 is first placed on the blast furnace top, and the blast furnace top charging tank 1 is connected to the equalizing pressure gas storage tank 5 through the air guide pipe 3 and the air pump 4, so that the gas in the blast furnace top charging tank 1 can be quickly transported to the equalizing pressure gas storage tank 5;
[0035] During the exhaust process, by arranging a diversion sleeve 2, a top connecting pipe 7, an internal moving pipe 8, a compression spring 9, a sealing ring 10 and an exhaust through-hole 11 at the top of the blast furnace top bunker 1, when the pressure inside the blast furnace is relatively high, the gas pressure can resist and press the internal moving pipe 8, driving the internal moving pipe 8 to move, thereby squeezing the compression spring 9, so that the exhaust through-hole 11 opened at the edge of the internal moving pipe 8 coincides with the exhaust through-hole 11 at the edge of the top connecting pipe 7, facilitating the discharge of the gas inside the blast furnace from the inside of the top connecting pipe 7 and the internal moving pipe 8, thus realizing automatic pressure equalization and exhaust;
[0036] During the exhaust process inside the blast furnace top bunker 1, by using a gas collecting hood 12 and a rubber fitting plate 13, the gas such as coal gas inside the furnace can enter the inside of the internal moving pipe 8 more concentratedly, facilitating automatic pressure equalization according to the gas pressure inside the furnace, and realizing automatic pressure equalization and pressure relief when the pressure is relatively high;
[0037] After the gas enters the inside of the diversion sleeve 2 through the gap between the diversion sleeve 2 and the top connecting pipe 7, the gas is pumped into the pressure equalization coal gas storage tank 5 through a gas guide pipe 3 and an air extraction pump 4. At this time, by using a diffusion hood 14, when the discharged pressure gas enters the pressure equalization coal gas storage tank 5, it can drive the driving blade 17 to rotate. Cooperating with a fixed support 15, a rotating shaft 16, a limit bearing 18, a connecting rod 19 and a cleaning strip 20, during the rotation of the driving blade 17, the rotating shaft 16 and the connecting rod 19 can be driven to rotate synchronously, so that the cleaning strip 20 can scrape along the inner wall of the pressure equalization coal gas storage tank 5, realizing the cleaning of the inner wall of the pressure equalization coal gas storage tank 5 and avoiding the phenomenon of ash accumulation and uncleanability on the inner wall of the pressure equalization coal gas storage tank 5;
[0038] After the gas completely enters the pressure equalization coal gas storage tank 5, through a support ring 21, a filter cylinder 22 and a filter screen 23, the gas can be filtered during the process of entering and being collected inside the pressure equalization coal gas storage tank 5, making the gas cleaner when it is discharged through an exhaust pipe 6 later, and avoiding the pollution of the atmospheric environment caused by the impurities doped in the gas being directly discharged.
[0039] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A top-pressure equalizing control device for a blast furnace, comprising a blast furnace top bunker (1), characterized in that: The top air outlet end of the blast furnace top bunker (1) is connected with a diversion sleeve (2), the end of the diversion sleeve (2) is connected with an air duct (3), the end of the air duct (3) is connected with an air extraction pump (4), and the air outlet end of the air extraction pump (4) is connected with an equalizing gas storage tank (5) through the air duct (3). One side of the bottom of the equalizing gas storage tank (5) is connected with an exhaust pipe (6); The top of the blast furnace top bunker (1) is fixedly connected with a top connecting pipe (7). The diversion sleeve (2) is sleeved outside the top connecting pipe (7). An internal moving pipe (8) is embedded and sleeved inside the top connecting pipe (7). The top of the internal moving pipe (8) is fixedly connected with a compression spring (9). A sealing ring (10) is arranged at the contact position between the top edge of the internal moving pipe (8) and the inner wall of the top connecting pipe (7). Exhaust through holes (11) are opened at corresponding positions on the sides of the top connecting pipe (7) and the internal moving pipe (8); The bottom edge of the internal moving pipe (8) is connected with a gas collecting hood (12), and a rubber fitting plate (13) is connected between the edge of the gas collecting hood (12) and the corresponding position at the top of the blast furnace top bunker (1).
2. The top-pressure equalizing control device for a blast furnace according to claim 1, characterized in that: The diversion sleeve (2) is detachably connected to the top of the blast furnace top bunker (1) through an intake flange. There is a gap between the diversion sleeve (2) and the top connecting pipe (7). The top of the internal moving pipe (8) is connected to the inner top wall of the compression spring (9).
3. A top pressure equalization control device for a blast furnace according to claim 2, characterized in that: The top of the blast furnace top bunker (1) is conical, and the edge of the rubber fitting plate (13) is closely attached to the conical surface inside the top of the blast furnace top bunker (1); When the gas collecting hood (12) is pushed by the internal moving pipe (8) to contact the bottom of the top connecting pipe (7), the positions of the exhaust through holes (11) inside the top connecting pipe (7) and the internal moving pipe (8) correspond to each other, and the sizes of the exhaust through holes (11) opened inside the top connecting pipe (7) and the internal moving pipe (8) are the same.
4. A top pressure equalizing control device for a blast furnace according to claim 1, characterized in that: The air outlet end of the air duct (3) is connected with a diffusion hood (14) at the inner top position of the equalizing gas storage tank (5). A fixed bracket (15) is fixedly installed at the inner top edge of the equalizing gas storage tank (5). A limit bearing (18) is installed in the middle of the fixed bracket (15). A rotating shaft (16) is rotatably connected to the inside of the limit bearing (18). A driving blade (17) is arranged at the top of the rotating shaft (16) corresponding to the diffusion hood (14). The bottom edge of the rotating shaft (16) is connected with a connecting rod (19), and a cleaning strip (20) is connected to the end of the connecting rod (19); A support ring (21) is installed at the inner bottom of the equalizing gas storage tank (5). A filter cartridge (22) is fitted and clamped at the position above the support ring (21) inside the equalizing gas storage tank (5). A filter screen (23) is arranged inside the filter cartridge (22).
5. A top pressure equalizing control device for a blast furnace according to claim 4, characterized in that: The connecting rod (19) drives the cleaning strip (20) at its end to rotate, and the edge of the cleaning strip (20) is in close contact with the inner wall of the pressure-equalizing gas storage tank (5). The top of the pressure-equalizing gas storage tank (5) is detachably connected with a tank cover.
6. The pressure equalizing control device for the blast furnace top according to claim 4, characterized in that: The edge of the filter cylinder (22) is closely attached to the inner wall of the pressure-equalizing gas storage tank (5). Two groups of filter meshes (23) are embedded and clamped inside the filter cylinder (22), and the pore diameters of the two groups of filter meshes (23) inside the filter cylinder (22) are different, and the position of the filter cylinder (22) is higher than that of the exhaust pipe (6).