Blast furnace top pressure abnormity interlocking protection device
By designing the blast furnace roof pressure abnormality chain protection device and adopting step-type pressure relief and gas treatment devices, the safety and environmental pollution problems in blast furnace pressure abnormality are solved, and production safety and equipment protection are achieved.
Patent Information
- Application Number
- CN202422363314.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The prior art has insufficient pressure relief efficiency when the blast furnace pressure is abnormal, and there is a risk of high pressure, which can easily lead to equipment damage and environmental pollution, and the high temperature of the pressure relief gas can easily cause scalding to people.
A blast furnace roof pressure abnormality chain protection device is designed, and the step-type pressure relief mechanism is adopted. The pressure relief gas is treated by a pressure-regulating butterfly valve, a pressure-regulating valve group, and the first and second discharge valves are opened in turn, and the pressure relief gas is treated in combination with the filtration, disinfection and cooling device.
Ensure safe production of blast furnaces, extend equipment life, reduce accidents, and avoid toxic and harmful gas emissions and scalding of high-temperature gases.
Smart Images
Figure CN223163441U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of blast furnace pressure relief, in particular to an abnormal top pressure interlock protection device for a blast furnace. Background Technique
[0002] A blast furnace is a device used for producing metals such as iron and steel, and is widely used in industries such as metallurgy and mining. The blast furnace mainly consists of a furnace body, a burden charging device, a burden conveying system, a burner, a control system, etc. The working principle of the blast furnace is to heat the burden at a high temperature to make it melt and transform into a liquid state, and then output the liquid iron or steel and other metals through equipment such as a continuous casting machine to form the required finished products.
[0003] The top pressure of the blast furnace refers to the gas pressure inside the blast furnace shaft. If it rises abnormally, it will pose a threat to production equipment, personnel safety and environmental protection. Therefore, it is necessary to relieve the pressure of the blast furnace in time. Although the existing technology can relieve the pressure after the blast furnace is over-pressurized during use, the pressure relief efficiency is insufficient. When the blast furnace pressure continues to increase abnormally, there is still a high-pressure risk only by relieving the pressure through the relief valve, and it is easy to cause safety accidents and equipment damage in a short time. Moreover, when relieving the pressure of the blast furnace, there will be toxic and harmful gases in the pressure relief gas, and direct emission will cause environmental pollution. At the same time, the pressure relief gas is usually at a high temperature, and the emission of high-temperature gas is likely to cause scalding of personnel.
[0004] Therefore, it is necessary to provide a new abnormal top pressure interlock protection device for a blast furnace to solve the above technical problems. Content of the Utility Model
[0005] The purpose of the utility model is to provide an abnormal top pressure interlock protection device for a blast furnace to solve the problems put forward in the above background technique.
[0006] To achieve the above purpose, the utility model provides the following technical solution: An abnormal top pressure interlock protection device for a blast furnace, including the blast furnace top body, and further including:
[0007] A pressure sensor arranged on the top of the blast furnace top body, a gravity dust collector is arranged on the top of the blast furnace top body, a pressure relief pipe is arranged on one side of the blast furnace top body, a pressure regulating valve group is arranged inside the pressure relief pipe, and a pressure regulating butterfly valve is arranged outside the pressure relief pipe;
[0008] A box body arranged at one end of the pressure relief pipe, a filter plate for filtering harmful substances in the pressure relief gas is slidably connected to the inner wall of the box body, a cleaning mechanism is arranged on the top of the filter plate, a cleaning box is arranged on the top of the box body, a disinfection chamber and a cooling chamber are respectively arranged in the inner cavity of the cleaning box, two groups of water pumps are arranged outside the cleaning box, and a refrigeration mechanism is arranged inside the cooling chamber.
[0009] Preferably, a first relief valve is provided at the top of the gravity dust collector, and a second relief valve is provided at the top of the blast furnace top body.
[0010] Preferably, the cleaning mechanism includes a connecting plate fixed to the top of the filter plate. One side of the connecting plate is fixedly connected with a limiting rod, and a scraping plate for cleaning the filter plate is slidably connected to the outside of the limiting rod.
[0011] Preferably, the refrigeration mechanism includes a thermoelectric cooler disposed inside the cooling chamber. A water storage tank is disposed outside the thermoelectric cooler, and a heat exchanger is disposed at the heating end of the thermoelectric cooler.
[0012] Preferably, a connecting pipe is provided at the water outlet end of the water pump. One end of the connecting pipe is provided with a cleaning cover, and a plurality of spray heads are provided at the bottom of the cleaning cover.
[0013] Preferably, two liquid inlets are provided at the top of the cleaning tank, and a collection chamber is provided inside the box body.
[0014] Preferably, a drain pipe and an exhaust pipe are respectively provided on the outside of the box body, and a box door is provided on one side of the box body.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0016] The present invention performs stepped safety pressure relief by setting multiple interlocking automatic protection devices. When the pressure inside the blast furnace continuously rises abnormally, stepped pressure relief is achieved by sequentially opening the pressure regulating butterfly valve, the pressure regulating valve group, the first relief valve, and the second relief valve. Using stepped pressure relief can ensure the safety of the blast furnace, extend the service life of blast furnace equipment, reduce accidents, disinfect the pressure relief gas through the cleaning tank, and cool down the pressure relief gas. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic structural diagram of a preferred embodiment of the blast furnace top pressure abnormal interlocking protection device provided by the present invention;
[0018] Figure 2 is a schematic structural diagram of the box body in the present invention;
[0019] Figure 3 is a schematic structural diagram of the cleaning tank in the present invention;
[0020] Figure 4 is a schematic structural diagram of the filter plate in the present invention.
[0021] In the figure: 1. Blast furnace top body; 2. Pressure sensor; 3. Gravity dust collector; 4. Pressure relief pipe; 5. Pressure regulating valve group; 6. Pressure regulating butterfly valve; 7. Box body; 8. Filter plate; 9. Cleaning mechanism; 91. Connecting plate; 92. Limit rod; 93. Scraper; 10. Cleaning tank; 11. Disinfection chamber; 12. Cooling chamber; 13. Water pump; 14. Refrigeration mechanism; 141. Semiconductor refrigeration chip; 142. Water storage tank; 143. Heat exchanger; 15. First relief valve; 16. Second relief valve; 17. Connecting pipe; 18. Cleaning cover; 19. Sprayer; 20. Liquid inlet; 21. Collection chamber; 22. Drain pipe; 23. Exhaust pipe; 24. Box door. Detailed implementation manners
[0022] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present utility model as follows.
[0023] Please refer to Figures 1-4 As shown, a blast furnace top pressure abnormal interlock protection device includes a blast furnace top body 1. A pressure sensor 2 is installed on the top of the blast furnace top body 1. The internal pressure of the blast furnace top body 1 can be monitored through the pressure sensor 2. A gravity dust collector 3 is arranged on the top of the blast furnace top body 1. A pressure relief pipe 4 is arranged on one side of the blast furnace top body 1. A pressure regulating valve group 5 is arranged inside the pressure relief pipe 4. The pressure regulating valve group 5 is composed of multiple valves. A pressure regulating butterfly valve 6 is arranged outside the pressure relief pipe 4. The pressure regulating butterfly valve 6 adopts a hydraulic triple eccentric metal hard seal butterfly valve, and a tungsten carbide wear-resistant layer is sprayed on the inner wall of the pressure regulating butterfly valve 6. The valve body and disc of the pressure regulating butterfly valve 6 are made of 16Mn material. The above-mentioned type of butterfly valve has stronger structural stability and higher pressure relief performance. A box body 7 is arranged at one end of the pressure relief pipe 4. One side of the box body 7 is communicated with one end of the pressure relief pipe 4. A filter plate 8 is slidably connected to the inner wall of the box body 7. Harmful substances in the pressure relief gas can be filtered through the filter plate 8. A cleaning mechanism 9 is arranged on the top of the filter plate 8. The filter plate 8 can be cleaned through the cleaning mechanism 9. A cleaning tank 10 is arranged on the top of the box body 7. A disinfection chamber 11 and a cooling chamber 12 are respectively arranged in the inner cavity of the cleaning tank 10. The pressure relief gas can be disinfected through the cleaning tank 10, and the pressure relief gas can be cooled and temperature-reduced. Two groups of water pumps 13 are arranged outside the cleaning tank 10. The two groups of water pumps 13 are respectively communicated with the disinfection chamber 11 and the cooling chamber 12. A refrigeration mechanism 14 is arranged inside the cooling chamber 12. The refrigeration mechanism 14 can cool the water flow inside the cooling chamber 12 to improve the cooling effect on the pressure relief gas. A drain pipe 22 and an exhaust pipe 23 are respectively arranged outside the box body 7. A box door 24 is arranged on one side of the box body 7.
[0024] Refer to Figure 1As shown, a first relief valve 15 is provided at the top of the gravity dust collector 3, and a second relief valve 16 is provided at the top of the blast furnace top body 1. When the internal pressure of the blast furnace top body 1 continuously rises, the control regulating butterfly valve 6, the regulating valve group 5, the first relief valve 15 and the second relief valve 16 are opened in sequence one after another.
[0025] Reference Figure 2 , Figure 3 and Figure 4 As shown, the cleaning mechanism 9 includes a connecting plate 91 fixed to the top of the filter plate 8. One side of the connecting plate 91 is fixedly connected with a limiting rod 92. A scraping plate 93 is slidably connected to the outside of the limiting rod 92. The filter plate 8 can be cleaned by the scraping plate 93. Pull the scraping plate 93 to slide on the outside of the limiting rod 92, so that the scraping plate 93 cleans the impurities on the surface of the filter plate 8, which is convenient for subsequent filtration. The refrigeration mechanism 14 includes a semiconductor refrigeration sheet 141 arranged inside the cooling chamber 12. The semiconductor refrigeration sheet 141 is a prior art and can achieve the effect of rapid refrigeration. A water storage tank 142 is arranged outside the semiconductor refrigeration sheet 141. A heat exchanger 143 is arranged at the heating end of the semiconductor refrigeration sheet 141. The heat exchanger 143 is a prior art. Heat exchange is carried out between the refrigerating end of the semiconductor refrigeration sheet 141 and the water in the cooling chamber 12, and heat exchange is carried out between the heat exchanger 143 at the heating end of the semiconductor refrigeration sheet 141 and the water inside the water storage tank 142, so as to achieve the effect of refrigerating the water flow inside the cooling chamber 12. A connecting pipe 17 is arranged at the water outlet end of the water pump 13. One end of the connecting pipe 17 is provided with a cleaning cover 18. Multiple spray heads 19 are arranged at the bottom of the cleaning cover 18. Two liquid inlets 20 are arranged at the top of the cleaning box 10. Disinfectant and tap water are respectively poured into the disinfection chamber 11 and the cooling chamber 12 through the liquid inlets 20. A collection chamber 21 is arranged in the inner cavity of the box body 7.
[0026] Working principle: When the internal pressure of the blast furnace is abnormal, the primary pressure relief in the first and second stages is first achieved through the pressure regulating butterfly valve 6 and the pressure regulating valve group 5. When the internal pressure continues to rise, the pressure relief is carried out through the blow-off valve structure. Among them, the first blow-off valve 15 and the second blow-off valve 16 are installed at the upper end of the blast furnace top body 1. The first blow-off valve 15 and the second blow-off valve 16 are opened in sequence after the pressure regulating butterfly valve 6 and the pressure regulating valve group 5 are opened to achieve stepped pressure relief. The device adopts four groups of pressure relief structures to achieve stepped pressure relief, which can ensure the safety of the blast furnace and ensure the safe production of the blast furnace. In actual production applications, in order to accurately control the pressure relief gradient, when the pressure inside the blast furnace top body 1 reaches 195Kpa, 197Kpa, and 199Kpa respectively, the pressure regulating butterfly valve 6, the pressure regulating valve group 5, and the first blow-off valve 15 are opened in sequence, and the second blow-off valve 16 is opened 15 seconds after the first blow-off valve 15 is opened to ensure that the blast furnace is in a safe production state. The pressure relief gas discharged from the pressure relief pipe 4 is absorbed through the box body 7, and the harmful substances in the pressure relief gas can be filtered through the filter plate 8. The disinfectant liquid and tap water are respectively poured into the disinfection chamber 11 and the cooling chamber 12 through the liquid inlet 20. The water pump 13 is started to pump out the disinfectant liquid inside the disinfection chamber 11, and the effect of disinfecting the pressure relief gas is achieved through the cleaning cover 18 and the spray head 19, avoiding the problem of the discharge of toxic and harmful gases. The heat exchange is carried out between the refrigerating end of the semiconductor refrigeration sheet 141 and the water in the cooling chamber 12, and the heat exchanger 143 carries out the heat exchange between the heating end of the semiconductor refrigeration sheet 141 and the water inside the water storage tank 142, so as to achieve the effect of refrigerating the water flow inside the cooling chamber 12. The water pump 13 is started to pump out the refrigerated water flow inside the cooling chamber 12, and the effect of cooling and reducing the temperature of the pressure relief gas is achieved through the cleaning cover 18 and the spray head 19, avoiding the problem that the discharge of high-temperature gas is easy to cause scalding of personnel.
[0027] The above is only a preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to make equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change, and modification made to the above embodiment based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A blast furnace top pressure abnormal interlock protection device, comprising a blast furnace top main body (1), characterized in that, It further includes: A pressure sensor (2) arranged at the top of the blast furnace top body (1). A gravity dust collector (3) is arranged at the top of the blast furnace top body (1). A pressure relief pipe (4) is arranged on one side of the blast furnace top body (1). A pressure regulating valve group (5) is arranged inside the pressure relief pipe (4). A pressure regulating butterfly valve (6) is arranged outside the pressure relief pipe (4); A box body (7) arranged at one end of the pressure relief pipe (4). A filter plate (8) for filtering harmful substances in the pressure relief gas is slidably connected to the inner wall of the box body (7). A cleaning mechanism (9) is arranged at the top of the filter plate (8). A cleaning tank (10) is arranged at the top of the box body (7). A disinfection chamber (11) and a cooling chamber (12) are respectively arranged in the inner cavity of the cleaning tank (10). Two groups of water pumps (13) are arranged outside the cleaning tank (10). A refrigeration mechanism (14) is arranged inside the cooling chamber (12).
2. The blast furnace top pressure abnormal interlock protection device according to claim 1, characterized in that: A first relief valve (15) is arranged at the top of the gravity dust collector (3). A second relief valve (16) is arranged at the top of the blast furnace top body (1).
3. The blast furnace top pressure abnormal interlock protection device according to claim 1, characterized in that: The cleaning mechanism (9) includes a connecting plate (91) fixed to the top of the filter plate (8). A limiting rod (92) is fixedly connected to one side of the connecting plate (91). A scraping plate (93) for cleaning the filter plate (8) is slidably connected to the outside of the limiting rod (92).
4. The blast furnace top pressure abnormal interlock protection device according to claim 1, characterized in that: The refrigeration mechanism (14) includes a semiconductor refrigeration sheet (141) arranged inside the cooling chamber (12). A water storage tank (142) is arranged outside the semiconductor refrigeration sheet (141). A heat exchanger (143) is arranged at the heating end of the semiconductor refrigeration sheet (141).
5. The blast furnace top pressure abnormal interlock protection device according to claim 1, characterized in that: The water outlet end of the water pump (13) is provided with a connecting pipe (17). One end of the connecting pipe (17) is provided with a cleaning cover (18). Multiple groups of spray heads (19) are arranged at the bottom of the cleaning cover (18).
6. The blast furnace top pressure abnormal interlock protection device according to claim 1, characterized in that: Two groups of liquid inlets (20) are arranged at the top of the cleaning tank (10). A collection chamber (21) is arranged in the inner cavity of the box body (7).
7. The abnormal top pressure interlock protection device for blast furnace according to claim 1, characterized in that: A drain pipe (22) and an exhaust pipe (23) are respectively arranged outside the box body (7). A box door (24) is arranged on one side of the box body (7).