CN108103255B - Discharge system for discharging gaseous substances in blast furnace wall - Google Patents
Discharge system for discharging gaseous substances in blast furnace wall Download PDFInfo
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- CN108103255B CN108103255B CN201810063816.7A CN201810063816A CN108103255B CN 108103255 B CN108103255 B CN 108103255B CN 201810063816 A CN201810063816 A CN 201810063816A CN 108103255 B CN108103255 B CN 108103255B
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- blast furnace
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/002—Evacuating and treating of exhaust gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to the technical field of blast furnace equipment, in particular to an exhaust system for exhausting gaseous substances in a blast furnace wall. The exhaust system comprises at least one collecting and discharging unit, each collecting and discharging unit is provided with a collecting pipeline, a first end of the collecting pipeline extends into the blast furnace wall and is used for collecting gas or vapor accumulated in the blast furnace wall, and a second end of the collecting pipeline is communicated with the atmosphere or is connected with an exhaust mechanism. The beneficial effects of the invention are as follows: and the gas or water vapor accumulated in the blast furnace wall in the production process is timely discharged, so that the erosion rate of the gas or water vapor to refractory materials in the blast furnace wall is reduced, and the cooling efficiency of the blast furnace wall is improved.
Description
Technical Field
The invention relates to the technical field of blast furnace equipment, in particular to an exhaust system for exhausting gaseous substances in a blast furnace wall.
Background
Blast furnace ironmaking is the main technological method of the ironmaking technology, the current furnace age of the large and medium-sized blast furnace in China is more than 10-15 years, and the furnace age of the blast furnace generation in developed countries such as Germany, japan and the like is generally more than 15-20 years. The cost of newly building or repairing a blast furnace is huge, and the enterprise benefit is obviously affected. In recent years, the blast furnaces at home and abroad frequently have the accident of hearth burning and suffer from abnormal rise of the temperature of hearth carbon bricks, and some blast furnaces are burnt even put into production for 1 to 2 years, so that the production life of large and medium blast furnaces is greatly shortened, the safe production of the blast furnaces is seriously threatened, and huge economic losses are caused for enterprises.
The service life of the first generation of blast furnace is generally calculated by the service life of a blast furnace hearth, liquid molten iron and slag are accumulated in the hearth (1450-1550 ℃), the refractory material of the blast furnace hearth is the largest in dosage, the lining is generally made of carbon refractory bricks, and a water-cooling wall is arranged on the cold face of the refractory bricks. In the production process, gaseous substances which need to be discharged in time can be generated in the blast furnace wall. The gas substances accumulated in the refractory material of the blast furnace mainly comprise three sources, namely, the refractory material contains certain volatile matters (the volatile matters refer to that a sample is isolated from air heating under a specified condition, and organic substances in the sample are heated to decompose a part of gas or liquid with smaller molecular weight), and the volatile matters are gradually volatilized and released in a high-temperature environment; secondly, high-pressure high-temperature production gas flowing at high speed is generated in the blast furnace, and the production gas permeates into the low-pressure low-temperature part through capillary pores of the refractory material to form escaping gas; thirdly, water carried by the leaked or escaped gas of the cooling equipment is accumulated in the refractory material, and the water is vaporized to form water vapor after the temperature is increased.
The gaseous substances can cause different degrees of damage to the blast furnace, and particularly, the water vapor accumulated in the furnace wall has huge damage to refractory materials and cooling systems of the furnace. Firstly, water vapor reacts with a hearth carbon refractory material at high temperature to destroy the refractory material structure and reduce the performance of the refractory material; and secondly, the volume of the gasified water is enlarged by a plurality of times, huge pressure is generated in a closed space in the furnace wall, the furnace wall or the cooling wall is pushed to deform, a gap is formed between the cooling wall and the refractory material, huge heat transfer resistance is formed, a cooling system is destroyed, the temperature of the hearth carbon brick is quickly increased to exceed a reasonable working temperature range, when the water vapor pressure reaches a certain degree, the refractory brick is pushed to shift, a molten iron channel is locally formed in the hearth, and the blast furnace hearth can be directly burnt through. Therefore, gaseous substances in the furnace wall of the blast furnace must be discharged out of the blast furnace as soon as possible in order to ensure safe production.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an exhaust system for exhausting gaseous substances in a blast furnace wall, which is used for timely exhausting various gaseous substances accumulated in the blast furnace wall, improving the cooling efficiency of the blast furnace wall, and reducing the erosion rate of refractory materials of the blast furnace wall.
To achieve the above and other objects, according to the present invention, there is provided an exhaust system for exhausting gaseous substances from a blast furnace wall, for connection to the furnace wall, for exhausting gas or vapor accumulated in the furnace wall, the exhaust system comprising at least one collecting and exhausting unit, each collecting and exhausting unit having a collecting pipe having a first end extending into the blast furnace wall for collecting gas or vapor accumulated in the blast furnace wall and a second end communicating with the atmosphere or connected to an exhausting mechanism.
The beneficial effects of the invention are as follows: and the gas or water vapor accumulated in the blast furnace wall in the production process is timely discharged, so that the erosion rate of the gas or water vapor to refractory materials in the blast furnace wall is reduced, and the cooling efficiency of the blast furnace wall is improved.
Further, the discharge system includes an exhaust manifold to which the first end of the collection conduit of each collection discharge unit extends into the ramming mass refractory material layer within the furnace wall and the second end is connected.
Further, the exhaust mechanism comprises an exhaust branch pipe and a safety valve arranged on the exhaust branch pipe, and the exhaust branch pipe is connected with the second end of the collecting pipeline and the exhaust manifold.
Further, a first control valve is arranged on the exhaust branch pipe and located at the upstream of the safety valve, and a pressure gauge is arranged at the second end of the exhaust branch pipe or the collecting pipeline.
Further, a bypass pipeline connected with the safety valve in parallel is arranged on the exhaust branch pipe, and a bypass valve is arranged on the bypass pipeline.
The beneficial effects of adopting the further scheme are as follows: the gas substances accumulated in the blast furnace wall are collected through a collecting pipeline, the safety valve is calibrated according to the working condition of the installation position of the collecting pipeline before being guided to the safety valve, and the safety valve is automatically opened to discharge gas when the pressure of the gas substances accumulated in the front of the safety valve exceeds a calibration value; when the blast furnace is in a maintenance state or the safety valve is abnormal, the bypass valve is opened to directly discharge gaseous substances; the gaseous substances discharged through the safety valve or the bypass valve are finally discharged in a concentrated way through the exhaust manifold, so that the management is convenient; the pressure gauge is arranged to detect and record the pressure value of the collecting pipeline, on one hand, the pressure calibration of the safety valve can be adjusted accordingly, the opening standard of the safety valve is arranged to adapt to the type of the gaseous substances to be discharged, on the other hand, the pressure value of the point can be combined with the temperature detection value to study the erosion process of the furnace wall according to the measured value, the formation and evolution rule of an air gap in the furnace wall are studied, the influence of abnormal fluctuation of the temperature of the furnace wall on the erosion of the furnace wall is judged, and the method has very beneficial effects on studying the life of the hearth.
Further, the lowest point of the second end of the collecting pipeline is also connected with a water draining branch pipe for draining water.
Further, the drainage system further includes a drainage manifold to which the drainage branch pipe of each collecting and draining unit is connected.
Further, a second control valve and a drain valve are sequentially arranged on the drain branch pipe, and the drain valve is positioned at one end close to the drain main pipe.
The beneficial effects of adopting the further scheme are as follows: the gas accumulated in the blast furnace wall contains vapor, partial gaseous substances are condensed in the discharging process of the vapor or the vapor in the gas, the condensed water is accumulated in the drainage branch pipe and is discharged into the drainage main pipe through the drain valve for centralized discharging.
Further, a plurality of the collecting and discharging units are distributed along the circumferential direction and/or the height direction of the blast furnace wall.
Further, the first end of the collecting pipeline penetrates through a reserved hole in the furnace wall and stretches into the blast furnace wall; or the first end of the collecting pipeline is shared with other orifices on the furnace wall and extends into the furnace wall of the blast furnace through the other orifices.
The beneficial effects of adopting the further scheme are as follows: the collecting and discharging units are arranged at different positions of the blast furnace wall, so that gaseous substances in the blast furnace wall can be conveniently and fully discharged in time, the treatment effect of the blast furnace wall on the gaseous substances is improved, the safety performance is improved, and the service life is prolonged; and the existing orifice on the blast furnace wall is fully utilized, the workload is reduced, and the economic benefit is improved.
Drawings
FIG. 1 shows a first flow chart of the exhaust system for exhausting gaseous substances from the wall of a blast furnace according to the present invention;
FIG. 2 shows a second flow chart of the exhaust system of the present invention for exhausting gaseous materials from the wall of a blast furnace;
FIG. 3 shows a third flow chart of the exhaust system for exhausting gaseous substances from the wall of a blast furnace according to the present invention;
FIG. 4 is a schematic view showing the structure of the collecting pipe of the exhaust system for exhausting gaseous substances from the wall of the blast furnace of the present invention in common with other ports;
FIG. 5 is a schematic view showing the structure of the collecting pipe of the discharging system for discharging gaseous substances from the blast furnace wall of the present invention extending into the blast furnace wall through the preformed hole;
FIG. 6 shows an expanded plan view of the installation of the exhaust system for exhausting gaseous substances from the wall of a blast furnace according to the present invention on the hearth of the blast furnace.
Description of the part reference numerals
1. A collecting pipeline;
21. an exhaust branch pipe;
22. a bypass line;
23. a first control valve;
24. a bypass valve;
25. a safety valve;
3. an exhaust manifold;
41. a pressure gauge;
42. a third control valve;
51. a water discharge branch pipe;
52. a second control valve;
53. a drain valve;
6. a water drain header;
71. a furnace shell;
72. a cooling device;
73. ramming materials;
74. refractory bricks;
8. and a thermocouple.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
The terms such as "upper", "lower", "left", "right", "middle" and "a" and the like are also used in the present specification for convenience of description, but are not intended to limit the scope of the present invention, and the relative changes or modifications thereof are not limited to essential changes in technical content, but are also regarded as the scope of the present invention.
Before describing embodiments of the present invention in detail, an application environment of the present invention will be described. The technology of the invention is mainly applied to the field of blast furnace equipment in the iron-making technology, in particular to the field of long-life production and operation of blast furnaces. The invention solves the technical problems of short service life and low safety performance of the blast furnace caused by abnormal corrosion of the furnace lining of the blast furnace due to damage to a blast furnace cooling system caused by various gaseous substances accumulated in the furnace wall of the blast furnace in the production process. In the invention, refractory materials in the blast furnace wall are refractory bricks, ramming materials (ramming materials refer to unshaped refractory materials which are constructed by a ramming method and harden under the heating effect higher than normal temperature) and the like, and the exhaust system is arranged on the blast furnace wall, so that gaseous substances continuously gathered on the blast furnace wall in the production process can be timely discharged through the exhaust system, the heat transfer system of the blast furnace wall is prevented from being damaged by gas expansion, the erosion rate of the refractory materials is reduced, and the service life of the blast furnace is prolonged.
As shown in fig. 4 to 6, the exhaust system for exhausting gaseous substances in a blast furnace wall according to the embodiment of the present invention is used for being connected to the blast furnace wall, exhausting gaseous substances such as gas or vapor accumulated in the blast furnace wall, and the exhaust system comprises at least one collecting and exhausting unit, each collecting and exhausting unit has a collecting pipe 1, a first end of the collecting pipe 1 extends into the blast furnace wall for collecting gas or vapor accumulated in the blast furnace wall, and a second end is connected to the atmosphere or an exhausting mechanism. As shown in fig. 1, when the second end of the collecting pipe 1 is directly connected to the outside atmosphere, a first control valve 23 may be provided, and gaseous substances may be discharged by opening and closing the first control valve 23, or may be discharged directly through the collecting pipe 1.
As shown in fig. 4 to 6, the blast furnace is of a cylindrical structure, and the blast furnace wall comprises a furnace shell 71, a cooling device 72 and refractory materials which are sequentially arranged from outside to inside, in the present invention, the refractory materials comprise ramming mass 73 and refractory bricks 74, the ramming mass 73 is located between the cooling device 72 and the refractory bricks 74, and the cooling device 12 can be a cooling wall or some other device with a cooling function. The molten iron and slag in the blast furnace are contacted with the refractory bricks 74, and the gaseous substances and accumulated water in the blast furnace are generally concentrated in the area of the ramming mass 73 in the production process, wherein the main components of the gaseous substances comprise escaping gas, water vapor and the like generated under the high-temperature condition, and if the gas, the water vapor and the accumulated water in the ramming mass 73 cannot be timely discharged, the refractory bricks 74 and the ramming mass 73 are easily pushed to be separated, or the ramming mass 73 is separated from a cooling wall, and the heat in the furnace cannot be efficiently transmitted to the cooling water in the cooling equipment 72, so that the temperature of the refractory bricks 74 is quickly increased and exceeds the reasonable working temperature of the refractory bricks and are corroded by the high-temperature molten iron or slag.
As shown in fig. 4 to 6, the discharge system further comprises an exhaust manifold 3, the first end of the collecting pipe 1 of each collecting and discharging unit extending into the blast furnace wall to the refractory layer in the furnace, in this embodiment the collecting pipe 1 extending into the region of the ramming mass 73 of the refractory layer, the second end of the collecting pipe 1 being connected to the exhaust manifold 3. The exhaust mechanism comprises an exhaust branch pipe 21 and a safety valve 25 arranged on the exhaust branch pipe 21, wherein the air inlet end of the exhaust branch pipe 21 is connected with the upper side of the second end of the collecting pipeline 1, and the air outlet end of the exhaust branch pipe 21 is connected with the exhaust manifold 3. A first control valve 23 is provided upstream of the relief valve 25 on the exhaust branch pipe 21, i.e., gaseous substances first pass through the first control valve 23 before reaching the relief valve 25. The exhaust branch pipe 21 is provided with a bypass pipeline 22 connected in parallel with a safety valve 25, the bypass pipeline 22 is provided with a bypass valve 24, and when the blast furnace is in a maintenance state or the safety valve 25 is abnormal, the bypass valve 24 is opened to directly discharge gaseous substances.
As shown in fig. 4 to 6, the exhaust system further includes a pressure gauge 41 for detecting the pressure value in the collecting pipe 1, and the pressure gauge 41 communicates with the exhaust branch pipe 21 or the second end of the collecting pipe 1 through a third control valve 42. As shown in fig. 2, a pressure gauge 41 may be installed at the second end of the collecting pipe 1 to detect and record the pressure value in the collecting pipe 1; alternatively, as shown in fig. 3, a pressure gauge 41 may be installed on the exhaust branch pipe 21 between the first control valve 23 and the relief valve 25 to detect and record the pressure value in the collection pipe 1. The pressure value in the corresponding collecting and discharging unit can be detected and recorded by arranging the pressure gauge on the one hand due to different furnace pressures at different positions of the blast furnace wall, and the pressure calibration of the corresponding safety valve is arranged according to the pressure value, when the gas pressure reaches the calibration value, the safety valve is opened, the gas is discharged, and when the gas pressure is lower than the calibration value, the safety valve is closed. In the blast furnace production, when the calibration value of the safety valve is higher than the pressure of the gas in the furnace at the corresponding position, the produced gas can be ensured not to overflow even if a through seam appears in the furnace wall. On the other hand, the pressure value of the point is detected by the pressure gauge, and the erosion process of the furnace wall is researched by combining the temperature detection value of the thermocouple 8 at the point, so that the relation between abnormal fluctuation of the temperature of the furnace wall and the pressure of the gas in the furnace wall is researched, and the method has a very beneficial effect on researching the life of the furnace hearth. The components such as the pressure gauge and the safety valve are matched to timely discharge gaseous substances such as gas or water vapor in the blast furnace wall.
In the production process, gaseous substances in the blast furnace wall are required to be discharged in time, accumulated water in the blast furnace wall is also required to be discharged in time, and the accumulated water in the blast furnace wall mainly has two sources. Firstly, cooling equipment at the tuyere and above is damaged and leaked, the working environment of the blast furnace tuyere equipment is bad, and part of cooling water after damage leaks into gaps between refractory bricks and the cooling equipment and is accumulated in refractory materials; secondly, the supersaturated moisture carried by the escaping gas is completely vaporized at high temperature by blast furnace blast and the moisture carried by the raw fuel, and partial vaporized moisture is condensed after entering the furnace shell or cooling equipment along with the escaping gas, and liquid water is accumulated in the hearth refractory material along the furnace shell or cooling equipment under the action of gravity because the hearth is positioned at the bottom of the blast furnace.
As shown in fig. 4 to 6, in order to timely and smoothly discharge the accumulated water in the furnace wall or the accumulated water carried in the gas or the accumulated water after the water vapor is condensed, the lower side of the second end of the collecting pipeline 1 is further connected with a water discharge branch pipe 51 for discharging water, the air discharge branch pipe 21 is arranged at the highest point of the second end of the collecting pipeline 1, and the water discharge branch pipe 51 is arranged at the lowest point of the second end of the collecting pipeline 1, so that the gaseous substances and the accumulated water can smoothly reach the designated discharge position according to the characteristics of the gaseous substances and the accumulated water respectively. The drainage system further includes a drainage header 6, and drainage branches 51 of each collecting and draining unit are connected to the drainage header 6, and drain accumulated water intensively through the drainage header 6. The drain branch pipe 51 is provided with a second control valve 52 and a drain valve 53 in sequence, and accumulated water sequentially passes through the control valve 52 and the drain valve 53 and then enters the drain header pipe 6 to be discharged in a concentrated manner. When drain valve 53 fails or needs to be replaced and maintained, second control valve 52 can be closed for maintenance, and drain valve 53 is arranged to drain accumulated water and effectively prevent gaseous substances from leaking. Drain valve 53 may not be installed in a particular application and second control valve 52 may be periodically opened to drain.
As shown in fig. 4 to 6, in order to enable the gas, the water vapor and the accumulated water in the furnace wall of the blast furnace to be discharged timely and sufficiently, a plurality of collecting and discharging units are arranged on the blast furnace, and the number of the collecting and discharging units can be selected and set according to specific conditions. The plurality of collecting and discharging units may be disposed only in the circumferential direction of the blast furnace wall, or only in the height direction of the blast furnace wall, or in both the circumferential direction and the height direction of the blast furnace wall. The gas outlet ends of the gas exhaust mechanisms of the plurality of collecting and discharging units are connected with the gas exhaust manifold 3, and gaseous substances are converged and discharged through the gas exhaust manifold 3; the water outlet ends of the water discharging mechanisms of the plurality of collecting and discharging units are connected with a water discharging main pipe 6, and accumulated water and condensed water are converged and discharged through the water discharging main pipe. As shown in fig. 6, four collecting and discharging units are provided, drain valves 53 on the water outlet ends of the drain branch pipes 51 of two adjacent collecting and discharging units arranged along the height direction of the blast furnace collect accumulated water and discharge the accumulated water into the drain header pipe 6 for centralized discharge through pipelines; the gas outlet ends of the exhaust branch pipes 21 of two adjacent collecting and discharging units arranged along the height direction of the blast furnace collect and discharge the gaseous substances into the exhaust manifold 3 for centralized discharge. Gaseous substances and accumulated water are uniformly and intensively discharged, so that the structural layout is simplified, and the management is convenient.
The invention is further illustrated below in connection with examples, which are to be understood as being illustrative of the invention and not limiting the scope of the invention.
Embodiment one:
as shown in fig. 4, the front end of the collecting pipeline 1 is shared with other orifices on the furnace wall, and extends into the blast furnace wall through the other orifices to collect gas and accumulated water in the blast furnace wall. Other orifices can be temperature measuring holes or grouting holes for installing refractory thermocouples 8, and the existing orifices are fully utilized, so that the workload is reduced. When the collecting pipeline 1 and the thermocouple 8 share an orifice, the cooling equipment 72 arranged on the cold surface of the ramming mass 73 is a cooling wall, the outer side of the cooling wall is provided with a furnace shell 71 made of steel plates, a blast furnace hearth is provided with a plurality of thermocouples 8, the thermocouples 8 sequentially penetrate through the furnace shell 71, the cooling equipment 72 and the ramming mass 73 and extend into the refractory bricks 74, when the collecting pipeline 1 and the thermocouples 8 share the orifice, the collecting pipeline 1 is sleeved on the thermocouples 8 and sequentially penetrates through the furnace shell 71 and the cooling equipment 72 to reach the ramming mass 73, and the exhaust pipe 1 is fixed on the blast furnace shell. One end of the collecting pipeline 1 far away from the blast furnace wall is sealed through a sealing flange, and the exhaust mechanism is fixedly connected with the collecting pipeline 1 and is communicated with the inside of the collecting pipeline 1, so that gas delivery is realized. In this embodiment, the exhaust branch pipe 21 and the bypass pipeline 22 are DN15 steel pipes, a first control valve 23 and a safety valve 25 are first arranged on the exhaust branch pipe 21, the first control valve 23 is a DN15 exhaust valve, the safety valve 25 is a DN15 safety valve, the pressure of the safety valve 25 is calibrated to be 0.2MPa, when the pressure of gas accumulated in the furnace wall is greater than 0.2MPa, the safety valve 25 automatically opens to discharge water vapor and escape gas, and the bypass valve 24 is a DN15 ball valve. The exhaust branch pipe 21 is also provided with a third control valve 42, the third control valve 42 is a DN15 pressure gauge ball valve, the pressure gauge 41 is connected, the pressure gauge 41 can display the pressure value on site, and can transmit data to a control room to record the statistical pressure value. The safety valve 25 and the bypass valve 24 are connected with the DN15 bypass pipeline 22, and the gaseous substances of a plurality of collecting exhaust units are connected with the exhaust manifold 3 with the pipe diameter DN25 in a summarizing way. The lower side of the collecting pipeline 1 is provided with a drain branch pipe 51, the drain branch pipe 51 is provided with a second control valve 52, the second control valve 52 is a DN15 ball valve, and the water outlet end of the drain branch pipe 51 is connected with a drain valve 53 for periodically draining water.
Embodiment two:
as shown in fig. 5, the front end of the collecting pipeline 1 extends into the blast furnace wall through a preformed hole on the blast furnace wall to collect gas and accumulated water in the blast furnace wall. When the gas collecting device is installed, if no available hole exists in the blast furnace wall, the gas in the blast furnace wall is collected by directly drilling and inserting the collecting pipeline 1 into the blast furnace wall. The collecting pipe 1 passes through the furnace shell 71 and the cooling device 72 in sequence to reach the ramming mass 73, and the collecting pipe 1 is fixed on the furnace shell of the blast furnace. The rear end of the collecting pipeline 1 far away from the blast furnace wall is sealed through a sealing flange, and the exhaust mechanism is fixedly connected with the collecting pipeline 1 and is communicated with the inside of the collecting pipeline 1, so that gas delivery is realized. In this embodiment, the exhaust branch pipe 21 and the bypass pipeline 22 are DN25 steel pipes, a first control valve 23 and a safety valve 25 are first arranged on the exhaust branch pipe 21, the first control valve 23 is a DN25 exhaust valve, the safety valve 25 is a DN25 safety valve, the pressure of the safety valve 25 is calibrated to be 0.4MPa, when the pressure of gas accumulated in the furnace wall is greater than 0.4MPa, the safety valve 25 automatically opens to discharge water vapor and escape gas, and the bypass valve 24 is a DN25 ball valve. The exhaust branch pipe 21 is also provided with a third control valve 42, the third control valve 42 is a DN25 pressure gauge ball valve, the pressure gauge 41 is connected, the pressure gauge 41 can display the pressure value on site, and can transmit data to a control room to record the statistical pressure value. The safety valve 25 and the bypass valve 24 are connected with a DN25 bypass pipeline 22, and the gaseous substances of a plurality of collecting exhaust units are connected with an exhaust manifold 3 with the pipe diameter DN32 in a totality way. The lower side of the collecting pipeline 1 is provided with a drain branch pipe 51, the drain branch pipe 51 is provided with a second control valve 52, the second control valve 52 is a DN25 ball valve, and the water outlet end of the drain branch pipe 51 is connected with a drain valve 53 for periodically draining water. In this embodiment, at least two collecting and discharging units are provided in the height direction of the blast furnace, and two adjacent collecting and discharging units share the exhaust manifold 3.
According to the invention, the collection and discharge unit with a simple structure is arranged on the blast furnace wall to continuously discharge gaseous substances and accumulated water accumulated in the furnace wall in the blast furnace production process, so that the phenomenon that the gas damages refractory materials of the blast furnace wall and damages a cooling system of the blast furnace wall to cause abnormal corrosion of the refractory materials of the blast furnace is avoided. Effectively promotes the safe and stable operation of the blast furnace, prolongs the service life of the blast furnace and improves the economic benefit.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (6)
1. An exhaust system for discharging gaseous substances in a blast furnace wall, which is used for being connected with the furnace wall to discharge gas or water vapor accumulated in the furnace wall, and is characterized in that: the exhaust system comprises at least one collecting and discharging unit and an exhaust manifold, each collecting and discharging unit is provided with a collecting pipeline, a first end of the collecting pipeline extends into the blast furnace wall and is used for collecting gas or water vapor accumulated in the blast furnace wall, and a second end of the collecting pipeline is communicated with the atmosphere or is connected with an exhaust mechanism;
the blast furnace wall comprises a furnace shell, cooling equipment, ramming materials and refractory bricks which are sequentially arranged from outside to inside, and molten iron and slag in the blast furnace are contacted with the refractory bricks; the first end of the collecting pipeline of each collecting and discharging unit extends into the ramming mass refractory material layer in the furnace wall, and the second end of the collecting pipeline is connected to the exhaust main pipe;
the exhaust mechanism comprises an exhaust branch pipe and a safety valve arranged on the exhaust branch pipe, the exhaust branch pipe is connected with the highest point of the second end of the collecting pipeline and the exhaust main pipe, a first control valve is arranged on the exhaust branch pipe and positioned at the upstream of the safety valve, and a pressure gauge is arranged at the second end of the exhaust branch pipe or the collecting pipeline; the lowest point of the second end of the collecting pipeline is also connected with a water draining branch pipe for draining water.
2. An exhaust system for exhausting gaseous substances from a blast furnace wall according to claim 1, wherein: the exhaust branch pipe is provided with a bypass pipeline connected with the safety valve in parallel, and the bypass pipeline is provided with a bypass valve.
3. An exhaust system for exhausting gaseous substances from a blast furnace wall according to claim 1, wherein: the drainage system further includes a drainage manifold to which the drainage branch pipe of each collecting and draining unit is connected.
4. A discharge system for discharging gaseous substances from a blast furnace wall according to claim 3, wherein: the drainage branch pipe is sequentially provided with a second control valve and a drain valve, and the drain valve is positioned at one end close to the drainage main pipe.
5. An exhaust system for exhausting gaseous substances from a blast furnace wall according to claim 1, wherein: the plurality of collecting and discharging units are distributed along the circumferential direction and/or the height direction of the blast furnace wall.
6. An exhaust system for exhausting gaseous substances from a blast furnace wall according to claim 1, wherein: the first end of the collecting pipeline penetrates through a reserved hole in the furnace wall and stretches into the blast furnace wall; or the first end of the collecting pipeline is shared with other orifices on the furnace wall and extends into the furnace wall of the blast furnace through the other orifices.
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| JPH07118714A (en) * | 1993-10-26 | 1995-05-09 | Nippon Steel Corp | Method for repairing furnace wall of blast furnace |
| CN102198922A (en) * | 2010-03-24 | 2011-09-28 | 国家纳米技术与工程研究院 | Collecting device for controlling flow rate of high pressure liquid and working method thereof |
| CN104152618A (en) * | 2014-08-07 | 2014-11-19 | 山西太钢不锈钢股份有限公司 | Soft-water cooling pipeline control method for blast furnace |
| CN104313217A (en) * | 2014-11-26 | 2015-01-28 | 中冶华天工程技术有限公司 | Blast furnace bottom |
| CN105838832A (en) * | 2016-06-12 | 2016-08-10 | 中冶华天南京工程技术有限公司 | Water supply and drainage and exhaust system of blast furnace |
| CN207845678U (en) * | 2018-01-23 | 2018-09-11 | 中冶赛迪工程技术股份有限公司 | The exhaust system of gaseous material in a kind of discharge Wall of Blast Furnace |
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