Blast furnace hot blast stove heat accumulator collapse online maintenance device and use method thereof

Abstract

The invention relates to the field of hot blast stove maintenance, and discloses a blast furnace hot blast stove heat accumulator collapse online maintenance device and a using method thereof.The blast furnace hot blast stove heat accumulator collapse online maintenance device comprises a high-temperature-resistant endoscope (3), a high-temperature-resistant drilling machine (10), a curing material conveyor (12) and a heat accumulator conveyor (4), and a detection hole is formed in a hot blast stove; the high-temperature-resistant endoscope (3) observes the interior of the hot-blast stove through the detection hole, the high-temperature-resistant drilling machine (10) can drill holes towards the hot-blast stove and take out samples obtained after drilling, the curing material conveyor (12) inputs curing materials into the hot-blast stove, and the heat accumulator conveyor (4) is located above a heat accumulator of the hot-blast stove and used for conveying the curing materials into the hot-blast stove. And the heat accumulator conveyor (4) conveys a new heat accumulator (5) into the hot blast stove. The blast furnace hot blast stove heat accumulator collapse online maintenance device can carry out online maintenance on heat accumulator collapse of a hot blast stove in the production process.

Description

Technical Field

[0001] The invention relates to the field of hot blast stove maintenance, and in particular to an online maintenance device for collapse of a heat storage body of a blast furnace hot blast stove and a use method thereof. Background Art

[0002] A hot blast furnace is a device used to heat air. Its basic working principle is to heat the air by burning fuel or using electricity and then send it into the space or equipment that needs to be heated. Stable hot blast furnace regenerator working conditions are an important condition for stable blast furnace production.

[0003] The heat storage body of the hot blast stove may collapse, and once the heat storage body collapses, measures must be taken quickly, otherwise the working condition of the hot blast stove will deteriorate rapidly, causing the entire hot blast stove to be scrapped and unable to work.

[0004] At present, it is impossible to detect the boundaries and areas of the heat storage body collapse when the hot blast furnace is in production, so it is impossible to take targeted measures to control and delay the further development of the heat storage body collapse. The conventional treatment method is to delay the rapid deterioration trend of the heat storage body collapse hazard by reducing (or stabilizing) the temperature of the hot blast furnace dome; for a blast furnace equipped with four hot blast furnaces, it is necessary to shut down a hot blast furnace with the hazard of heat storage body collapse, and at the same time start the operation of replacing the heat storage body and the grate within a long period. This method takes about 3 to 4 months; for a blast furnace equipped with only three hot blast furnaces, it is necessary to build a new hot blast furnace. After the new hot blast furnace is put into use, the hot blast furnace with the collapsed heat storage body will be withdrawn from production for maintenance.

[0005] However, the current treatment methods have the following disadvantages: large investment; if the method of stopping the furnace to replace the heat storage body is adopted, all the heat storage bodies in the collapsed area and the non-collapsed area need to be replaced with new heat storage bodies at one time, which requires a considerable investment; if the method of building a new hot blast furnace is adopted, the investment will be even greater; and the method of requiring the hot blast furnace to be shut down and separated from the production sequence for offline treatment not only has a long construction period; the period of impact on the stable production of the blast furnace is also very long; and stopping the furnace to replace the heat storage body requires entering the furnace to operate, and the safety risk is also very high. Summary of the invention

[0006] In order to overcome the problems of large investment, long construction period and high safety risk in the prior art when repairing heat storage body collapse, the present invention provides an online repair device for heat storage body collapse of a blast furnace hot blast stove and a use method thereof, wherein the online repair device for heat storage body collapse of a blast furnace hot blast stove can perform online repair of heat storage body collapse of the hot blast stove during the production process.

[0007] In order to achieve the above-mentioned purpose, the present invention provides an online maintenance device for the collapse of a heat storage body of a blast furnace hot blast stove, the online maintenance device for the collapse of a heat storage body of a blast furnace hot blast stove comprises a high-temperature resistant endoscope, a high-temperature resistant drilling machine, a solidifying material conveyor and a heat storage body conveyor. A detection hole is provided on the hot blast stove, the high-temperature resistant endoscope observes the inside of the hot blast stove through the detection hole, the high-temperature resistant drilling machine can drill holes toward the hot blast stove and take out samples obtained by drilling, the solidifying material conveyor inputs solidifying material into the hot blast stove, the heat storage body conveyor is located above the heat storage body of the hot blast stove, and the heat storage body conveyor conveys new heat storage body into the hot blast stove.

[0008] Preferably, at least two detection holes are provided, at least one detection hole is provided below the grate of the hot blast stove, and at least one detection hole is provided above the heat storage body of the hot blast stove.

[0009] Preferably, the high temperature resistant endoscope comprises a probe which can be inserted into the hot air furnace through the detection hole, and the surface of the probe is treated to resist high temperature.

[0010] Preferably, the outside of the probe is detachably provided with a cooling sleeve for cooling, and the cooling sleeve is detachably provided in the detection hole;

[0011] The cooling sleeve adopts gas cooling, and includes a sleeve body, a valve, a front seal and a rear seal located at both ends of the cooling sleeve, a through hole is arranged in the sleeve body, the valve is located between the front seal and the rear seal and close to the front seal, the valve is communicated with the through hole, the front seal cooperates with the probe to seal the through hole, and the rear seal is provided with an air outlet, the cooling gas enters through the valve and flows out from the air outlet.

[0012] Preferably, the blast furnace hot blast stove heat storage body collapse online maintenance device further comprises a furnace shell flange and a flange cover plate matched with the furnace shell flange, and the flange cover plate is detachably connected to the furnace shell flange;

[0013] The furnace shell flange is connected to the drilling position of the high temperature resistant drilling machine and is used to seal the drilling hole.

[0014] Preferably, the furnace shell flange is provided with a center hole, the center hole is coaxially arranged with the drilled hole, and the radius of the center hole is not less than the radius of the drilled hole.

[0015] Preferably, the solidifying material conveyor comprises a pump, a high temperature resistant conveying pipeline and a cooling pipe sleeved outside the high temperature resistant conveying pipeline, the cooling pipe is sleeved in the drill hole, and the high temperature resistant conveying pipeline conveys the solidifying material into the hot air furnace via the cooling pipe.

[0016] Preferably, the cooling pipe is configured as a circulating water cooling pipe, which includes a cooling pipe body, a water inlet pipe, and a water outlet pipe. The bottom of the cooling pipe body is closed, and the water inlet pipe and the water outlet pipe are located at the front end of the cooling pipe body.

[0017] Preferably, partitions are arranged at intervals in the cooling pipe body, and the partitions guide cooling water to the bottom of the cooling pipe body.

[0018] The present invention also provides a method for using the on-line maintenance device for the collapse of a heat storage body of a blast furnace hot blast stove, the method comprising:

[0019] Step 1: Use the high temperature resistant endoscope to monitor whether the heat storage body collapses in the hot blast furnace;

[0020] Step 2: Use a high temperature resistant drilling machine to drill a hole at the bottom of the thermal storage body collapse position to confirm the boundary of the thermal storage body collapse;

[0021] Step 3: Use a solidifying material conveyor to convey the solidifying material to the bottom of the collapsed position of the thermal storage body to reinforce the foundation of the collapsed area;

[0022] Step 4: Use a thermal storage body conveyor to add new thermal storage body to the upper hollow area of ​​the thermal storage body collapse site.

[0023] According to the above technical solution, the heat storage body of the hot blast furnace is filled in the heat exchange section of the hot blast furnace, and is located above the grate. Due to factors such as the material and manufacturing defects of the grate, installation errors, and foundation deformation, the grate may be deformed. When the grate is deformed, the heat storage body itself has quality problems during manufacturing, or the water-cooled hot air valve of the hot blast furnace equipment leaks a lot of water, the leaked cooling water contacts the heat storage body, which will cause the heat storage body to be broken and pulverized. Once the heat storage body is broken and pulverized, the heat storage body will collapse and fall downward in fragments, thereby causing the heat storage body's resistance to the hot air to disappear, so that the hot air can quickly pass through the heat exchange section to reach the grate.

[0024] The temperature of high-temperature flue gas entering the heat exchange section is about 1400℃. Under normal circumstances, these high-temperature gases need to flow downward gradually through the gas path formed by the combination of multiple layers of heat storage bodies. During the flow process, the high-temperature air fully contacts and exchanges heat with the heat storage bodies in the heat exchange section, thus heating the heat storage bodies. Under normal circumstances, the temperature of the high-temperature gas after heat exchange is less than 450℃ when it reaches the grate. For the grate made of RQTSi4Mo, a common grate material, the normal operating temperature should be lower than 480℃. However, when the heat storage body collapses, the heat storage body originally filled in the heat exchange section sinks to the bottom, resulting in a cavity in the heat exchange section. The high-temperature gas will quickly reach the bottom through this cavity and contact the grate at the bottom and the heat storage body in the low-temperature section. Since it can directly contact the high-temperature hot gas, the temperature at the grate rises rapidly. When the temperature of the grate is higher than 480℃, it may cause the grate to deform and fail. Once the grate deformation failure is not effectively handled, it may cause large-scale collapse of the heat storage body, thus leading to failure of the hot blast furnace.

[0025] Therefore, in order to effectively monitor the collapse of the heat storage body in the hot blast stove, multiple sets of thermocouples are set on the hot blast stove to detect the actual working temperature of the heat storage body therein, and monitor whether the heat storage body and / or the grate collapse. Thermocouples are used to detect the heating rate in the hot blast stove to determine whether the heat storage body at that position has failed. Because the heat storage body collapses, it cannot effectively block the high-temperature gas, allowing the high-temperature flue gas to quickly pass through that position and causing the thermocouple at that position to heat up quickly.

[0026] Preferably, multiple thermocouples can be provided, and multiple thermocouples are provided along the height and circumference of the hot blast stove respectively. At the same height, multiple thermocouples arranged along the circumference can detect the position on the cross section of the hot blast stove where the collapse of the heat storage body occurs, while the thermocouples in the height direction can monitor the depth of the collapse of the heat storage body, thereby being able to determine the degree of the collapse of the heat storage body and preliminarily locate the bottom position of the collapse of the heat storage body.

[0027] Preferably, multiple thermocouples are arranged at the grate position, and the multiple thermocouples evenly cover the grate, so that full coverage monitoring of the grate can be achieved. When the thermocouple feedback grate temperature is higher than 480°C, overheating may occur, causing the grate to deform, and the grate deformation is very harmful, which may cause the collapse of the entire heat storage body, so it is necessary to strengthen the temperature detection of the grate.

[0028] When the thermocouple monitors the collapse of the heat storage body, first confirm the rate of temperature change of the grate during operation. If the rate of temperature change of the grate is higher than the temperature change rate of the thermocouple at the corresponding position of other normally working hot blast furnaces for a long time, it is necessary to check the deformation of the grate. Once the grate is found to be deformed, it is necessary to deal with the deformation problem of the grate first.

[0029] When dealing with the deformation of the grate, maintenance personnel can enter the bottom of the grate through the manhole at the bottom of the hot blast furnace or the manhole at the flue during routine maintenance of the blast furnace, and add columns under the grate to support the grate to achieve reinforcement of the grate. This can prevent the grate from further deformation or even displacement, which can cause the heat storage body to collapse.

[0030] After the deformation of the grate is reinforced, the collapsed position of the heat storage body can be processed. Before processing the collapsed position of the heat storage body, it is necessary to first determine the location and range of the heat storage body collapse. The online maintenance method for the heat storage body collapse of the hot blast furnace can determine the location and range of the heat storage body collapse by drilling and sampling the hot blast furnace.

[0031] Specifically: the high temperature resistant endoscope 3 can observe the approximate position of the collapse, and determine the bottom position of the collapse through the observation of the high temperature resistant endoscope. Then, the bottom position of the collapse is drilled and sampled by a high temperature resistant drilling machine, and the taken out heat storage body is observed. If there is any fragmentation or powdering, it means that the position is located at the position where the heat storage body collapsed. Then, sampling can be continued towards the edge of the collapsed heat storage body until the sampled heat storage body is a complete structure. There is no fragmentation or powdering of the heat storage body in the sample, which means that the boundary between the sampling point and the previous sampling point is the collapse boundary of the heat storage body.

[0032] During the sampling process, the situation inside the hot blast furnace can be observed through the high temperature resistant endoscope 3 so as to more effectively adjust the sampling point.

[0033] The purpose of sampling to find the collapse boundary is to input the solidified material into the hot air furnace in a targeted manner to prevent the solidified material from exceeding the collapse boundary of the heat storage body and reaching the heat storage body position in the normal area. After the solidified material acts on the normal heat storage body, it will affect the use effect of the heat storage body in the normal area.

[0034] After finding the boundary of the heat storage body collapse, solidified materials can be transported to the debris deposition area below the collapsed area, with the aim of bonding the fragmented materials of the heat storage body into a whole. On the one hand, the bonded whole can block the hot air, and more importantly, after being bonded into a whole, the debris will not continue to fall, and it can have a certain compressive strength, which can support the new heat storage body material that is subsequently placed in.

[0035] After the solidifying material is delivered to the location, it is necessary to wait for a while. After the solidifying material has solidified and the fragmented heat storage body at the bottom has been bonded into a whole, new heat storage body can be added from the top to the cavity at the collapsed part of the heat storage body until the cavity is filled.

[0036] Preferably, the thermal storage body conveyor needs to be located at an upper position of the thermal storage body collapse area so as to add new thermal storage body until the new thermal storage body fills up the cavity.

[0037] Preferably, after the hollow position is filled with new heat storage body, the hot blast stove can restore its function of blocking hot blast, and the heat exchange section of the hot blast stove can restore its function of heat exchange. At this time, the hollow left by drilling during the maintenance process can also be filled with high temperature resistant materials, so that the hot blast stove can have a better heat preservation effect, and the furnace shell can also be effectively protected. At this time, therefore, after the new heat storage body is added, the maintenance of the hot blast stove is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of an on-line maintenance device for the collapse of a heat storage body of a blast furnace hot blast stove;

[0039] Figure 2 is a cross-sectional view of a cooling jacket;

[0040] Figure 3 It is a cross-sectional view of a circulating water cooling pipe;

[0041] Figure 4 is a Figure 3 Axial expansion diagram;

[0042] Figure 5 It is a schematic diagram of the cooling principle in a circulating water cooling tube;

[0043] Figure 6 It is a cross-sectional view of a furnace shell flange;

[0044] Figure 7 is a schematic diagram of a flange cover;

[0045] Figure 8 It is a schematic diagram of a high temperature resistant drilling machine;

[0046] Fig. 9 It is a schematic diagram of another high temperature resistant drilling machine;

[0047] Fig.10 A schematic diagram of a thermal storage conveyor.

[0048] Description of Reference Numerals

[0049] 1 furnace shell 2 wall

[0050] 3High temperature resistant endoscope 4Heat storage body conveyor

[0051] 5 New heat storage body 6 Working platform

[0052] 13 High temperature resistant transmission pipeline 8 Furnace shell flange

[0053] 9 Flange cover 10 High temperature resistant drilling machine

[0054] 11 grate 12 solidified material conveyor

[0055] 31 Valve 32 Front seal

[0056] 33 rear seal 34 through hole

[0057] 35 air outlet 36 front seal

[0058] 30 sleeve body 51 cooling tube body

[0059] 52 water inlet pipe 53 water outlet pipe

[0060] 54 first partition 55 second partition

[0061] 56 cooling water pipe 81 center hole

[0062] 91 sealing hole 101 driving mechanism

[0063] 102 drilling mechanism 103 rack

[0064] 104 gear 105 handle

[0065] 106 sliding block 107 water inlet

[0066] 108 gear drive motor 109 circulating water circuit

[0067] 110 cooling water inlet pipe 41 hopper

[0068] 42 feeding pipe 43 cover plate DETAILED DESCRIPTION

[0069] In the present invention, unless otherwise specified, directional words such as "near, up, down, end, bottom" generally refer to the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0070] See also Figure 1-7The described online maintenance device for the collapse of the heat storage body of a blast furnace hot blast stove comprises a high temperature resistant endoscope 3, a high temperature resistant drilling machine 10, a solidifying material conveyor 12 and a heat storage body conveyor 4. The hot blast stove is provided with a detection hole. The high temperature resistant endoscope 3 observes the inside of the hot blast stove through the detection hole. The high temperature resistant drilling machine 10 can drill holes toward the hot blast stove and take out samples obtained by drilling. The solidifying material conveyor 12 inputs solidifying material into the hot blast stove. The heat storage body conveyor 4 is located above the heat storage body of the hot blast stove. The heat storage body conveyor 4 conveys new heat storage body 5 into the hot blast stove.

[0071] Through the implementation of the above technical solution, the heat storage body of the hot blast stove is filled in the heat exchange section of the hot blast stove, and is located above the grate 11. Due to factors such as the material and manufacturing defects of the grate, installation errors, and foundation deformation, the grate may be deformed. When the grate is deformed, the heat storage body itself has quality problems during manufacturing, or a large amount of water leaks from the water-cooled hot air valve of the hot blast stove equipment, the leaked cooling water contacts the heat storage body, which will cause the heat storage body to be fragmented and pulverized. Once the heat storage body is fragmented and pulverized, the heat storage body will collapse and fall downward in fragments, thereby causing the heat storage body's resistance to the hot air to disappear, so that the hot air can quickly pass through the heat exchange section to reach the grate 11.

[0072] The temperature of the high-temperature flue gas entering the heat exchange section is about 1400°C. Under normal circumstances, these high-temperature gases need to flow downward gradually through the gas path formed by the combination of multiple layers of heat storage bodies. During the flow process, the high-temperature air fully contacts and exchanges heat with the heat storage bodies in the heat exchange section, thereby heating the heat storage bodies. Under normal circumstances, the temperature of the high-temperature gas after heat exchange is less than 450°C when it reaches the grate 11. For the grate made of RQTSi4Mo, a common grate material, its normal operating temperature should be lower than 480°C. However, when the heat storage body collapses, the heat storage body originally filled in the heat exchange section sinks to the bottom, resulting in a cavity in the heat exchange section. The high-temperature gas will quickly reach the bottom through this cavity and contact the grate 11 at the bottom and the heat storage body in the low-temperature section. Since it can directly contact the high-temperature hot gas, the temperature at the grate 11 rises rapidly. When the temperature of the grate 11 is higher than 480°C, it may cause the grate 11 to deform and fail. Once the grate 11 fails to deform and is not effectively handled, it may cause large-scale collapse of the heat storage body, thereby causing the hot blast furnace to malfunction.

[0073] Therefore, in order to effectively monitor the collapse of the heat storage body in the hot blast stove, multiple sets of thermocouples are arranged on the hot blast stove to detect the actual working temperature of the heat storage body therein, and monitor whether the heat storage body and / or the grate 11 collapse. Thermocouples are used to detect the heating rate in the hot blast stove to determine whether the heat storage body at that position has failed. Because the heat storage body collapses, it cannot effectively block the high-temperature gas, allowing the high-temperature flue gas to quickly pass through that position, and causing the thermocouple at that position to heat up quickly.

[0074] Preferably, multiple thermocouples can be provided, and multiple thermocouples are provided along the height and circumference of the hot blast stove respectively. At the same height, multiple thermocouples arranged along the circumference can detect the position on the cross section of the hot blast stove where the collapse of the heat storage body occurs, while the thermocouples in the height direction can monitor the depth of the collapse of the heat storage body, thereby being able to determine the degree of the collapse of the heat storage body and preliminarily locate the bottom position of the collapse of the heat storage body.

[0075] Preferably, multiple thermocouples need to be arranged at the position of the grate 11, and the multiple thermocouples evenly cover the grate 11, so as to achieve full coverage monitoring of the grate 11. When the thermocouple feedback shows that the temperature of the grate 11 is higher than 480°C, overheating may occur, causing the grate 11 to deform, and the deformation of the grate 11 is very harmful, which may cause the collapse of the entire heat storage body, so it is necessary to strengthen the temperature detection of the grate 11.

[0076] When the thermocouple detects that the heat storage body has collapsed, first confirm the rate of temperature change of the grate 11 during operation. If the rate of temperature change of the grate 11 is higher than the temperature change rate of the thermocouples at the corresponding positions of other normally working hot blast furnaces for a long time, it is necessary to check the deformation of the grate 11. Once deformation of the grate 11 is found, the deformation problem of the grate 11 needs to be dealt with first.

[0077] When dealing with the deformation of the grate 11, maintenance personnel can enter the bottom of the grate 11 through the manhole at the bottom of the hot blast furnace or the manhole at the flue during routine maintenance of the blast furnace, and add columns under the grate 11 to support the grate 11, so as to reinforce the grate 11. This can prevent the grate 11 from further deformation or even displacement, which may cause the heat storage body to collapse.

[0078] After the deformation of the grate 11 is reinforced, the collapsed position of the heat storage body can be processed. Before processing the collapsed position of the heat storage body, it is necessary to first determine the position and range of the collapsed heat storage body. The online maintenance method for the collapsed heat storage body of the hot blast stove can determine the position and range of the collapsed heat storage body by drilling and sampling the hot blast stove.

[0079] Specifically: the high temperature resistant endoscope 3 can observe the approximate position of the collapse, and the bottom position of the collapse can be determined through the observation of the high temperature resistant endoscope 3. Then, the bottom position of the collapse is drilled and sampled by the high temperature resistant drilling machine 10, and the taken out heat storage body is observed. If there is any fragmentation or powdering, it means that the position is located at the position where the heat storage body collapsed, and then sampling can be continued towards the edge of the collapsed heat storage body until the sampled heat storage body is a complete structure. The heat storage body in the sample is not fragmented or powdered, which means that the boundary between the sampling point and the previous sampling point is the collapse boundary of the heat storage body.

[0080] During the sampling process, the situation inside the hot blast furnace can be observed through the high temperature resistant endoscope 3 so as to more effectively adjust the sampling point.

[0081] The purpose of sampling to find the collapse boundary is to input the solidified material into the hot air furnace in a targeted manner to prevent the solidified material from exceeding the collapse boundary of the heat storage body and reaching the heat storage body position in the normal area. After the solidified material acts on the normal heat storage body, it will affect the use effect of the heat storage body in the normal area.

[0082] After finding the boundary of the heat storage body collapse, solidified materials can be transported to the debris deposition area below the collapsed area, with the aim of bonding the fragmented materials of the heat storage body into a whole. On the one hand, the bonded whole can block the hot air, and more importantly, after being bonded into a whole, the debris will not continue to fall, and it can have a certain compressive strength, which can support the new heat storage body material that is subsequently placed in.

[0083] After the solidifying material is delivered to the place, it is necessary to wait for a while. After the solidifying material has solidified and the fragmented heat storage body at the bottom has been bonded into a whole, a new heat storage body 5 can be added from the top to the cavity at the collapsed part of the heat storage body until the cavity is filled.

[0084] Preferably, the thermal storage body conveyor 4 needs to be located at an upper position of the thermal storage body collapse area so as to add new thermal storage body 5 until the new thermal storage body 5 fills up the cavity.

[0085] Preferably, after the hollow position is filled with the new heat storage body 5, the hot blast stove can restore its function of blocking the hot blast, and the heat exchange section of the hot blast stove can restore its function of heat exchange. At this time, the hollow left by the drilling process can be filled with high temperature resistant materials, so that the hot blast stove can have a better heat preservation effect, and the furnace shell can also be effectively protected. At this time, therefore, after the new heat storage body 5 is added, the hot blast stove is repaired.

[0086] In this embodiment, preferably, at least two detection holes are provided, at least one detection hole is provided below the grate 11 of the hot blast stove, and at least one detection hole is provided above the heat storage body of the hot blast stove.

[0087] The high temperature resistant endoscope 3 can provide a more intuitive observation of the actual situation in the hot blast furnace, and the monitoring function of the auxiliary thermocouple can more quickly determine the location of the heat storage body collapse.

[0088] When the thermocouple detects a sudden temperature rise in the hot blast furnace, the high temperature endoscope 3 needs to be assisted to observe whether the heat storage body collapses, and the bottom position of the collapse is determined by the high temperature endoscope 3, so as to determine the sampling position of the high temperature drilling machine 10. During the sampling process, the high temperature endoscope 3 is used to assist in finding the boundary of the heat storage body, which can also be more targeted.

[0089] At least two detection holes are provided on the hot blast furnace, one detection hole is located at the upper part of the heat storage body, and the other detection hole is located at the lower part of the grate 11. The upper detection hole can observe the position of the heat storage body collapse, and the detection hole located at the lower part of the grate 11 can easily observe the working status of the grate 11. At the same time, the collapse of the heat storage body can also be observed through the detection hole located at the lower part of the grate 11, which can be verified with the situation observed by the upper detection hole, so as to help maintenance personnel judge the degree and range of the collapse of the heat storage body.

[0090] If the high temperature resistant endoscope 3 located below the grate 11 finds that the grate 11 is deformed, the deformed grate 11 needs to be reinforced and supported.

[0091] The deformation of the grate 11 is extremely harmful to the heat storage body. Once the grate 11 is deformed and displaced to a certain extent, it may detach, and may eventually cause the collapse of all the heat storage bodies in the hot blast furnace. Therefore, it is necessary to detect the state of the grate 11, especially when the collapse of the heat storage body has been found, it is necessary to pay special attention to the state of the grate 11 to avoid the situation where the deformation of the grate 11 causes the heat storage body to collapse aggravatedly.

[0092] Therefore, the hot blast furnace is provided with a detection hole below the grate 11, and during production, the high temperature endoscope 3 can be inserted through the detection hole to observe the use status of the grate 11, and the temperature value displayed by the thermocouple at the grate 11 can also verify the actual status of the grate 11. When the temperature at the grate 11 is normal and the status of the grate 11 observed by the high temperature endoscope 3 is also normal, it can be considered that the status of the grate 11 is normal, and no processing is needed temporarily, and step 2 can be directly performed to drill and sample the hot blast furnace to determine the area and boundary of the heat storage body collapse.

[0093] However, if it is observed that the grate 11 has been deformed, it is necessary to reinforce the grate 11 first, and the second step of sampling can be carried out only after the grate 11 is reinforced.

[0094] When reinforcing the deformed position of the grate 11, maintenance personnel can enter the bottom of the grate 11 through the maintenance passage, and then fix the supporting columns under the deformed position of the grate 11. By supporting the grate 11 with the supporting columns, the aggravation of the deformation of the grate 11 can be avoided, thereby effectively curbing the further collapse of the heat storage body at this position.

[0095] In this embodiment, preferably, the high temperature resistant endoscope 3 includes a probe that can be inserted into the hot air furnace through the detection hole, and the surface of the probe is treated to resist high temperature.

[0096] Since the temperature in the hot blast furnace is as high as several hundred degrees or even one thousand degrees, in order to ensure the reliability of the high temperature resistant endoscope 3 and avoid damage to the high temperature resistant endoscope 3 caused by high temperature, it is necessary to perform high temperature resistant treatment on the damaged part of the high temperature resistant endoscope 3 that extends into the hot blast furnace. One implementation method is to use high temperature resistant materials to make the probe part of the high temperature resistant endoscope 3; another implementation method is to perform cyclic cooling treatment at the probe position, and the probe part can be cooled in real time and sustainably through the circulation of the cooling medium.

[0097] In this embodiment, preferably, a cooling sleeve for cooling is detachably mounted on the outside of the probe, and the cooling sleeve is detachably mounted in the detection hole.

[0098] The cooling sleeve arranged outside the probe can be used to cool the probe surface and protect the probe from overheating.

[0099] In this embodiment, preferably, the cooling sleeve adopts gas cooling, and includes a sleeve body 30, a valve nozzle 31, a front seal 32 and a rear seal 33 located at both ends of the cooling sleeve, a through hole 34 is provided in the sleeve body 30, the valve nozzle 31 is located between the front seal 32 and the rear seal 33 and close to the front seal 32, the valve nozzle 31 is connected with the through hole 34, the front seal 32 cooperates with the probe to seal the through hole 34, and the rear seal 33 is provided with an air outlet 35, and the cooling gas enters through the valve nozzle 31 and flows out from the air outlet 35.

[0100] like Figure 2 As shown, the valve nozzle 31 is connected with the sleeve body 30, the probe passes through the through hole 34 and abuts against the rear seal 33, and the cooling gas enters the through hole 34 from the valve nozzle 31, instantly fills the cavity in the through hole 34 and wraps the probe, and the cooling gas in the through hole 34 flows toward the outlet hole 35, and cools the probe during the flow process.

[0101] In order to improve the cooling efficiency of the cold air, a front seal 32 and a rear seal 33 are respectively provided at both ends of the through hole 34. The front seal 32 is hollow, and the probe is sleeved in the inner hole of the front seal 32. The surface of the inner hole in contact with the probe forms a sealing surface, and the outer surface of the front seal 32 forms a sealing surface with the through hole 34. Therefore, under the action of the front seal 32, the through hole 34 and the probe form a seal at the position of the front seal 32, which can prevent the leakage of cooling gas. The rear seal 33 is sealed with the through hole 34 to prevent the cooling gas from leaking from the connection between the two.

[0102] The end of the rear seal 33 facing the probe is provided with a conical surface, which cooperates with the camera at the front of the probe. No sealing is required here. After the cooling gas enters the through hole 34, it flows out through the position where the probe and the conical surface cooperate, and finally flows out through the outlet hole 35. When the cooling gas flows in the through hole 34, it can not only seal the rod part of the probe, but also cool the camera at the front end of the probe when it flows out through the outlet hole 35, thereby more effectively ensuring the reliable use of the probe.

[0103] Preferably, a front seal is further provided at the front end of the front seal 32 to prevent the gas from leaking out of the hot blast furnace due to insufficient sealing performance of the front seal 32, thereby wasting cooling gas.

[0104] In this embodiment, preferably, the blast furnace hot blast stove regenerator collapse online maintenance device further includes a furnace shell flange 8 and a flange cover plate 9 matched with the furnace shell flange 8, and the flange cover plate 9 is detachably connected to the furnace shell flange 8;

[0105] The furnace shell flange 8 is connected to the drilling position of the high temperature resistant drilling machine 10 for sealing the drilled hole.

[0106] The approximate location and range of the thermal storage body collapse can be roughly determined by the data fed back by the thermocouple and the observation photos or videos of the high temperature endoscope 3. According to the determination result, the operator needs to drill the hot blast stove to confirm the boundary of the thermal storage body collapse.

[0107] Drilling operations require human operation and usually need to last for a period of time. Therefore, in order to facilitate the operation of drillers, a work platform 6 needs to be built on the outside of the hot air furnace so that personnel can stand on the work platform 6 to perform drilling operations. The drilled samples can also be placed on the spot, which is very convenient.

[0108] After the high-temperature endoscope monitors the approximate location of the thermal storage body collapse, the operator can determine the bottom position of the thermal storage body collapse area based on experience. After the thermal storage body collapses, the thermal storage body fragments will fall to the bottom of the collapsed area. After drilling a hole at this position and determining the boundary of the collapse, the solidifying material can be transported to the bottom of the collapse to bond the thermal storage body fragments in the entire area.

[0109] The drilling position is selected on the hot blast furnace according to the bottom position of the heat storage body collapse determined by the staff. Since the drilling will start from the furnace shell 1 and gradually drill inward, the drilling will damage the furnace shell 1 of the hot blast furnace, the wall 2 close to the furnace shell 1 and even the heat storage body, and the wall 2 is the insulation layer of the hot blast furnace. Therefore, the drilling holes will affect the insulation performance of the hot blast furnace. Therefore, the number of drillings should be reduced as much as possible.

[0110] When the heat storage body is fragmented or pulverized in the sample obtained through drilling, it means that the location is still at the heat storage body collapse site. When the heat storage body structure in the sample is intact and there is no fragmentation or pulverization, it means that the drilling location is outside the heat storage body collapse site. Therefore, the boundary of the heat storage body collapse is between these two drilling locations.

[0111] The working state of the hot blast furnace is divided into three states: burning furnace, stuffy furnace, and air supply. Burning furnace means that the combustion chamber of the hot blast furnace starts to burn, and the burning smoke enters the heat exchange chamber to heat the heat storage body in the heat exchange chamber. When the temperature of the heat storage body reaches the preset target, the combustion can be stopped. At this time, the working state of the burning furnace ends. Then the cold air below is sent into the heat exchange chamber to exchange heat with the already heated heat storage body, and after the heat exchange is completed, it is sent out from the upper outlet for production. When the temperature of the heat storage body drops to the preset target, the air supply working state is completed. The period of time when the air supply is completed and the burning furnace has not started is the stuffy furnace working state of the hot blast furnace. Since hot blast furnaces are usually set up in multiples, and multiple hot blast furnaces work in turn, each hot blast furnace can have a period of rest time after completing the burning and sending operations, which is the stuffy furnace state of the hot blast furnace. The operation of drilling holes in the hot blast furnace is carried out when the hot blast furnace is in the stuffy furnace state.

[0112] When the hot blast stove is in a stuffy state, a high temperature resistant drilling machine 10 is used to drill the hot blast stove, and the samples obtained by drilling are taken out to determine whether the heat storage body at the drilling position is collapsed and the degree of fragmentation of the heat storage body.

[0113] The top of the heat storage body inside the hot blast furnace and the lower part of the grate 11 are monitored with a high temperature endoscope 3 to preliminarily determine the position of the heat storage body collapse, the location of the collapse and the area of ​​the collapsed location. The corresponding defect location is accurately delineated on the outside of the furnace shell 1 and the location and number of openings for defect treatment construction are determined at the bottom of the defect location.

[0114] After determining the number of holes to be opened, weld the furnace shell flange 8 for construction at the hole opening position. During the hot blast furnace rotation interval, that is, when the hot blast furnace is in a stuffy working state, use a high-temperature resistant drilling machine 10 to drill holes in the furnace shell 1, the wall 2, and the collapsed part of the heat storage body through the furnace shell flange 8. If the hot blast furnace needs to be started during the hole opening process, immediately push out the high-temperature resistant drilling machine 10, and use the flange cover plate 9 to block the construction flange to prevent hot air from leaking from the hole position and ensure the normal online air supply of the hot blast furnace. When the hot blast furnace is in a stuffy working state during rotation, open the flange cover plate to continue the hole opening construction work. After the hole opening construction is completed, install the flange cover plate to close it and proceed to the next hole opening construction work.

[0115] During the drilling sampling process, the visible area inside the hot blast furnace is sampled and monitored by video using a high temperature resistant endoscope 3, so as to have a more intuitive understanding of the scattered state of the heat storage body fragments at the bottom of the heat storage body collapse, which is convenient for maintenance personnel to make solidified materials and determine the input position of solidified materials.

[0116] During the drilling process, the samples obtained when the drilling depth is different should be observed and analyzed. After drilling, the high temperature endoscope 3 can be inserted into the hot blast furnace through the hole to observe the visible area of ​​the hot blast furnace at that position. The conditions at different levels in the hot blast furnace can be inspected by taking photos and recording videos. Maintenance personnel can also formulate a more effective curing material input plan by analyzing photos and videos.

[0117] In this embodiment, preferably, the furnace shell flange 8 is provided with a center hole 81 , the center hole 81 is coaxially arranged with the drilled hole, and the radius of the center hole 81 is not less than the radius of the drilled hole.

[0118] After determining the number of holes to be opened, weld the furnace shell flange 8 for construction at the opening position. During the hot blast furnace rotation interval, that is, when the hot blast furnace is in a stuffy working state, use a high-temperature drilling machine 10 to drill holes through the center hole 84 of the furnace shell flange 8 to the furnace shell 1, the wall 2, and the collapsed part of the heat storage body. If the hot blast furnace needs to be started during the hole opening process, the high-temperature drilling machine 10 will be immediately withdrawn from the center hole 84, and the construction flange will be sealed with a flange cover plate 9 to prevent hot air from leaking from the opening position and ensure the normal online air supply of the hot blast furnace.

[0119] like Figure 6 and 7 As shown, in one embodiment, the furnace shell flange 8 is welded to the outer surface of the furnace shell 1, and the furnace shell flange 8 and the flange cover 9 are fastened by bolts. When the hot blast furnace is in a stuffy state, the flange cover 9 can be opened by removing the bolts, and the high-temperature resistant drilling machine 10 can continue to drill the hot blast furnace through the center hole 84. After exiting the high-temperature resistant drilling machine 10, the flange cover 9 can also be covered on the furnace shell flange 8 by tightening the bolts to achieve a sealing effect on the furnace shell flange 8.

[0120] Preferably, the furnace shell flange 8 is set to have a certain depth, and a sealing hole 91 is set on the flange cover 9, and the sealing hole 91 is filled with high-temperature resistant material. When the flange cover 9 is matched with the furnace shell flange 8, the sealing hole 91 will extend into the through-center hole 84, and the high-temperature resistant material located in the sealing hole 91 replaces the wall 2 at this position to achieve effective insulation and sealing of the hot air furnace.

[0121] After the hot blast furnace collapse failure is repaired, the holes left by drilling during the repair process need to be filled with high temperature resistant materials so that the wall 2 can be restored, the hot blast furnace can have a better insulation effect, and the furnace shell can also be effectively protected.

[0122] In this embodiment, preferably, the solidifying material conveyor 12 includes a pump, a high temperature resistant conveying pipeline 13 and a cooling pipe sleeved outside the high temperature resistant conveying pipeline 13, the cooling pipe is sleeved in the drilled hole, and the high temperature resistant conveying pipeline 13 conveys the solidifying material to the hot air furnace via the cooling pipe.

[0123] Based on the detection results of the high-temperature resistant endoscope 3, the maintenance personnel can determine the bottom position and boundary of the thermal storage body collapse area. According to the environment at the bottom of the thermal storage body collapse area, the maintenance personnel determine the delivery position of the solidifying material. If the bottom range of the collapse area is large, multiple delivery positions can be set.

[0124] When the high temperature resistant drilling machine 10 drills the hot blast furnace, it is also necessary to record the temperature inside the hot blast furnace in real time, especially to detect the temperature at the collapsed bottom of the hot blast furnace, and determine the curing temperature of the curing material based on the detection result.

[0125] The curing material is a heat-sensitive refractory material, which will start to solidify when the temperature reaches the curing temperature. Therefore, a temperature sensor needs to be provided at the front end of the high-temperature resistant drilling machine 10 so that the real-time temperature of the hot air furnace can be detected during the drilling process. The real-time monitored temperature value is provided to the maintenance personnel, who will make curing materials suitable for the temperature after comprehensively considering the temperature in the furnace body. So that the curing material can be reliably cured after being input to the target position, thereby achieving the purpose of bonding the heat storage body fragments.

[0126] In addition to determining the curing temperature, the curing material also needs to consider the curing time, that is, how long it takes for the curing material to completely solidify after reaching the curing temperature. The repair process needs to use this curing time to allow the curing material to flow into the thermal storage body fragments, achieve adhesion to the thermal storage body fragments, and finally form the purpose of overall curing of the thermal storage body fragments.

[0127] Since the solidifying material is a heat-sensitive material, it is necessary to avoid contact between the solidifying material and high-temperature substances before the heat storage body is transported to the target position. Preferably, the solidifying material needs to be cooled during the input of the solidifying material to avoid premature solidification of the solidifying material, which affects the flow effect of the solidifying material after it reaches the target position.

[0128] The curing temperature of the curing material needs to be adjusted on-site according to the temperature of the location where it needs to be placed. Therefore, the actual temperature in the hot air furnace measured during the drilling process is the best basis for making the curing temperature of the curing material.

[0129] In addition to the curing temperature, the crushing of the drilled sample and the particle size of the thermal storage body fragments are also factors that need to be considered when making the curing material.

[0130] In this embodiment, preferably, the cooling pipe is configured as a circulating water cooling pipe, which includes a cooling pipe body 51, a water inlet pipe 52, and a water outlet pipe 53. The bottom of the cooling pipe body 51 is closed, and the water inlet pipe 52 and the water outlet pipe 53 are located at the front end of the cooling pipe body 51.

[0131] In the process of conveying the solidified material, in order to prevent the solidified material from solidifying prematurely, the solidified material needs to be cooled. One implementation method is to set a cooling pipe in the hole wall used by the solidified material conveyor 12. The cooling pipe is built into the conveying hole, and the high temperature resistant conveying pipeline 13 of the solidified material conveyor 12 passes through the cooling pipe to input the solidified material to the hot blast furnace. Circulating water is set in the cooling pipe so that the temperature of the solidified material will not rise too high before reaching the target position. After being conveyed to the target position, the solidified material immediately exchanges heat with the hot blast furnace and starts to solidify.

[0132] The cooling pipe cannot discharge cooling water into the hot blast furnace. Therefore, the water inlet pipe 52 and the water outlet pipe 53 are located at the front end of the cooling pipe body 51, and the bottom of the cooling pipe body 51 is closed, that is, the cooling water enters the cooling pipe from outside the hot blast furnace. After the cooling water reaches the bottom of the cooling pipe, it flows back to the front end of the cooling pipe and is discharged to the outside of the hot blast furnace through the water outlet pipe 53. This cycle achieves the cooling effect.

[0133] During the transportation of the curing material, a high-temperature resistant endoscope 3 is used at the bottom of the hot blast furnace grate 11 to timely monitor the curing effect of the curing material, and according to the real-time monitoring situation, the material curing performance is adjusted to prevent the curing material from exceeding the collapse boundary of the heat storage body and affecting the use effect of the heat storage body in the normal non-treatment area.

[0134] In this embodiment, preferably, partitions are provided at intervals inside the cooling tube body 51 , and the partitions guide the cooling water to the bottom of the cooling tube body 51 .

[0135] like Figure 3As shown, an implementation method of a cooling pipe is as follows: the cooling pipe body 51 is configured as a cylinder with a ring-shaped cross-section, the water inlet pipe 52 and the water outlet pipe 53 are located at the front end of the cooling pipe body 51, and the positions of the water inlet pipe 52 and the water outlet pipe 53 are not far apart, and a first partition plate 54 is arranged between the water inlet pipe 52 and the water outlet pipe 53. The first partition plate 54 is used to block the water inlet pipe 52 and the water outlet pipe 53, so that after the cooling water enters the cooling pipe body 51, it cannot quickly reach the water outlet pipe 53.

[0136] like Figure 4 As shown, a plurality of second partitions 55 are further provided in the cooling tube body 51. The plurality of second partitions 55 are staggered one above the other, so that water flows back and forth repeatedly in the cooling tube body 51, thereby achieving a uniform cooling effect on the cooling tube body 51. Finally, the cooling water passes over the last second partition 55 and finally flows out from the water outlet pipe 53.

[0137] Preferably, although the cooling water temperature is higher closer to the water outlet pipe 53, since the cooling tube body 51 and the partition are made of metal and have very good thermal conductivity, the temperature difference at different positions of the cooling tube body 51 can be balanced through the heat conduction of its own material, and the cooling tube body 51 will not be overheated locally.

[0138] Another embodiment is that a cooling water pipe 56 is provided in the cooling pipe body 51, the inlet of the cooling water pipe 56 is connected to the water inlet pipe 52, and the pipe body of the cooling water pipe 56 is wound around the inner wall of the cooling pipe body 51, first spirally downward to the bottom of the cooling pipe body 51, and then spirally ascend to the top of the cooling pipe body 51 and communicate with the water outlet pipe 53. This method can also achieve the purpose of water intake and discharge from one end of the cooling pipe body 51 and cooling the entire area of ​​the cooling pipe body 51.

[0139] In order to facilitate practical operation, a working platform 6 can also be built outside the hot blast furnace. Through observation with a high-temperature endoscope 3, the bottom position of the collapse is determined, and the working platform 6 is built at a position slightly lower than the bottom of the collapse of the heat storage body. On the working platform 6, a high-temperature drilling machine 10 is used to drill the hot blast furnace. Multiple drillings are required to find two drilling positions where the heat storage body sample is pulverized and the heat storage body sample is not pulverized, and the boundary of the collapse is between the two drilling holes.

[0140] Similarly, the operation of inputting the solidifying material can also be performed on the working platform 6. The state of the thermal storage body sample in the drilling depth direction can also determine the boundary of the collapse in the depth direction. After determining the boundary of the collapse bottom, the solidifying material can be input in a targeted manner, so that the solidifying material can reliably achieve the adhesion of the thermal storage body fragments without affecting the thermal storage body in normal use.

[0141] In this embodiment, preferably, the input position of the solidified material is determined according to the area and boundary of the thermal storage body collapse determined in step 2, and multiple input positions can be set, and the multiple input positions evenly cover the area of ​​the thermal storage body collapse.

[0142] When the collapsed area is large, it is necessary to set up multiple input points for the solidifying material. Since the effective range of the solidifying material is limited, full coverage of the collapsed area can be achieved by setting up multiple input points for the solidifying material.

[0143] In this embodiment, preferably, in step four, the new heat storage body 5 is configured to have a shape with good fluidity.

[0144] After the solidified material is transported to the target position, it will wait for a period of time for the solidified material to be solidified. After the thermal storage body fragments at the bottom are observed to be completely solidified through the high-temperature endoscope at the bottom of the grate 11, new thermal storage body 5 can be added to the hot blast furnace through the thermal storage body conveyor 4 above, and the new thermal storage body 5 is set to have good fluidity so that it can move better in the hot blast furnace, so as to more effectively fill the space created by the collapse of the thermal storage body.

[0145] Preferably, the new heat storage body 5 is set to be spherical, so that the new heat storage body 5 can roll in the hot blast stove. The rolling makes the new heat storage body 5 have better fluidity and can more conveniently fill the cavity area in the hot blast stove.

[0146] New heat storage bodies 5 are continuously added until the space created by the collapse is completely filled up by the new heat storage bodies 5, thus achieving online maintenance of the collapsed heat storage bodies of the hot blast furnace, at which time the hot blast furnace can be used normally. Moreover, the entire maintenance process does not require the blast furnace to be shut down, but can be carried out in the hot blast furnace's stuffy working state during the intervals between hot blast furnace rotations.

[0147] A method for using an online maintenance device for blast furnace hot blast stove heat storage body collapse, the method comprising:

[0148] Step 1: Use a high temperature endoscope 3 to monitor whether the heat storage body collapses in the hot air furnace;

[0149] Step 2: Use a high temperature resistant drilling machine 10 to drill a hole at the bottom of the collapsed position of the thermal storage body to confirm the boundary of the thermal storage body collapse;

[0150] Step 3: Use the solidifying material conveyor 12 to convey the solidifying material to the bottom of the collapsed position of the thermal storage body to reinforce the foundation of the collapsed area;

[0151] Step 4: Use the thermal storage body conveyor 4 to add new thermal storage body 5 to the upper hollow area of ​​the thermal storage body collapse portion.

[0152] Through the implementation of the above technical solution, it is first necessary to monitor the working condition of the heat storage body in the hot blast furnace through a high-temperature resistant endoscope 3. Once the heat storage body collapses, it is necessary to deal with the collapsed position in time to avoid the continued deterioration of the collapse.

[0153] If the high temperature endoscope 3 finds that the heat storage body at a certain position in the hot blast furnace collapses, the position that the high temperature drilling machine 10 needs to drill can be preliminarily determined based on the collapse position monitored by the high temperature endoscope 3. The position and range of the heat storage body collapse can be determined by drilling and sampling the hot blast furnace.

[0154] Specifically: the high temperature resistant endoscope 3 can observe the approximate position of the collapse, and the bottom position of the collapse can be determined through the observation of the high temperature resistant endoscope 3. Then, the bottom position of the collapse is drilled and sampled by the high temperature resistant drilling machine 10, and the taken out heat storage body is observed. If there is any fragmentation or powdering, it means that the position is located at the position where the heat storage body collapsed, and then sampling can be continued towards the edge of the collapsed heat storage body until the sampled heat storage body is a complete structure. The heat storage body in the sample is not fragmented or powdered, which means that the boundary between the sampling point and the previous sampling point is the collapse boundary of the heat storage body.

[0155] During the sampling process, the situation inside the hot blast furnace can be observed through the high temperature resistant endoscope 3 so as to more effectively adjust the sampling point.

[0156] The purpose of sampling to find the collapse boundary is to input the solidified material into the hot air furnace in a targeted manner to prevent the solidified material from exceeding the collapse boundary of the heat storage body and reaching the heat storage body position in the normal area. After the solidified material acts on the normal heat storage body, it will affect the use effect of the heat storage body in the normal area.

[0157] After finding the boundary of the heat storage body collapse, solidified materials can be transported to the debris deposition area below the collapsed area, with the aim of bonding the fragmented materials of the heat storage body into a whole. On the one hand, the bonded whole can block the hot air, and more importantly, after being bonded into a whole, the debris will not continue to fall, and it can have a certain compressive strength, which can support the new heat storage body material that is subsequently placed in.

[0158] After the solidifying material is delivered to the place, it is necessary to wait for a while. After the solidifying material has solidified and the fragmented heat storage body at the bottom has been bonded into a whole, a new heat storage body 5 can be added from the top to the cavity at the collapsed part of the heat storage body until the cavity is filled.

[0159] Preferably, the thermal storage body conveyor 4 needs to be located at an upper position of the thermal storage body collapse area so as to add new thermal storage body 5 until the new thermal storage body 5 fills up the cavity.

[0160] Preferably, after the hollow position is filled with the new heat storage body 5, the hot blast stove can restore its function of blocking the hot blast, and the heat exchange section of the hot blast stove can restore its function of heat exchange. At this time, the hollow left by the drilling process can be filled with high temperature resistant materials, so that the hot blast stove can have a better heat preservation effect, and the furnace shell can also be effectively protected. At this time, therefore, after the new heat storage body 5 is added, the hot blast stove is repaired.

[0161] The method of use can detect the collapse of the heat storage body in the hot blast furnace as early as possible, thereby achieving early detection and early treatment. Taking the process method of the present invention to treat the hazard at the early stage of the heat storage body collapse hazard can avoid the further development and deterioration of the hazard, thereby effectively avoiding the investment in later construction. Compared with conventional methods, the present invention has less investment and good economic benefits.

[0162] This method of online treatment during the production of the hot blast furnace can also avoid the impact on production stability to the greatest extent. At the same time, the present invention occupies less site space, has a very short construction period, has almost no impact on normal production, and can also avoid the waste of materials in the conventional construction of new hot blast furnaces and replacement of heat storage bodies, saving equipment investment. At the same time, online treatment can also effectively utilize the normal heat storage bodies in the hot blast furnace, and the resource reuse rate is also very high.

[0163] See also Figure 8 Or the high temperature resistant drilling machine 10 described in 9, the high temperature resistant drilling machine 10 includes a feeding mechanism, a driving mechanism 101, a drilling mechanism 102 and a cooling mechanism, the driving mechanism 101 is drivingly connected to the drilling mechanism 102, the driving mechanism 101 and the drilling mechanism 102 are fixed to the hot air furnace through the feeding mechanism, and the cooling mechanism is used to cool the drilling mechanism 102.

[0164] like Figure 8 As shown, the feeding mechanism is designed as a gear rack mechanism, which includes a rack 103, a gear 104, a sliding block 106 and a handle 105 for driving the gear 104 to rotate. The gear 104 is connected to the sliding block 106. The gear 104 is driven to rotate by rotating the handle 105, and the sliding block 106 can slide along the length direction of the rack 103. The feeding mechanism is fixedly connected to the surface of the hot air stove, so rotating the handle 105 can drive the sliding block 106 to approach or move away from the hot air stove.

[0165] The driving mechanism 101 and the drilling mechanism 102 are fixedly connected to the sliding block 106. When the handle 105 is rotated, the sliding block 106 moves horizontally along the rack 103, and at the same time drives the driving mechanism 101 and the drilling mechanism 102 to approach or move away from the hot air furnace, thereby realizing drilling or exiting drilling.

[0166] like Fig. 9As shown, the cooling mechanism adopts cooling water circulation cooling, the cooling water inlet pipe 110 is connected to the water inlet 107, enters the circulating water circuit to start cooling the drilling structure, and finally flows back to the water storage tank from the water outlet through the return pipe.

[0167] Preferably, the cooling intensity can be controlled by a water pump during the cooling process. When the temperature of the drilling mechanism 102 is high, a larger volume of cooling water can be introduced into the cooling system. When the drilling temperature is not high, the flux of cooling water can be appropriately reduced.

[0168] Preferably, in addition to controlling the feeding amount of the drilling mechanism 102 by the handle 105 , a gear drive motor 108 may be provided to control the rotation of the gear 104 to achieve automatic feeding of the drilling mechanism 102 .

[0169] like Fig.10 The heat storage body conveyor 4 shown includes a hopper 41, a conveying pipe 42 and a cover plate 43. The hopper 41 is located above the conveying pipe 42 and is connected to the conveying pipe 42. The conveying pipe 42 is inclined, and one end inclined downward is set as an opening, and the other end is detachably connected to the cover plate 43.

[0170] When the heat storage body conveyor 4 is used, the new heat storage body 5 enters the feeding pipe 42 through the hopper 41, and slides down from the open end of the feeding pipe 42 into the hot blast furnace under the action of gravity. If the new heat storage body 5 is blocked in the feeding pipe 42 and cannot slide down, the cover plate 43 can be opened to extend the dredging stick into the feeding pipe 42, and the new heat storage body 5 stopped in the feeding pipe 42 can be pushed into the hot blast furnace. Installing the cover plate 43 can seal the feeding pipe 42 to prevent hot air from leaking from the feeding pipe 42.

[0171] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0172] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0173] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An online maintenance device for the collapse of a heat storage body of a blast furnace hot blast stove, characterized in that: The on-line maintenance device for the collapse of the heat storage body of a blast furnace hot blast stove comprises a high temperature resistant endoscope (3), a high temperature resistant drilling machine (10), a solidifying material conveyor (12) and a heat storage body conveyor (4). The hot blast stove is provided with a detection hole, and the high temperature resistant endoscope (3) observes the inside of the hot blast stove through the detection hole. The high temperature resistant drilling machine (10) can drill holes toward the hot blast stove and take out samples obtained by drilling. The solidifying material conveyor (12) inputs solidifying material into the hot blast stove. The heat storage body conveyor (4) is located above the heat storage body of the hot blast stove, and the heat storage body conveyor (4) conveys new heat storage body (5) into the hot blast stove.

2. The on-line maintenance device for the collapse of the heat storage body of the hot blast stove of a blast furnace according to claim 1 is characterized in that: At least two detection holes are provided, at least one detection hole is provided below the grate (11) of the hot blast stove, and at least one detection hole is provided above the heat storage body of the hot blast stove.

3. The on-line maintenance device for the collapse of the heat storage body of the hot blast stove of a blast furnace according to claim 2 is characterized in that: The high temperature resistant endoscope (3) comprises a probe capable of extending into the hot air furnace through the detection hole, and the surface of the probe is subjected to high temperature resistant treatment.

4. The on-line maintenance device for the collapse of the heat storage body of the hot blast stove of a blast furnace according to claim 3 is characterized in that: The outside of the probe is detachably provided with a cooling sleeve for cooling, and the cooling sleeve is detachably provided in the detection hole; The cooling sleeve adopts gas cooling, and comprises a sleeve body (30), a valve (31), a front seal (32) and a rear seal (33) located at both ends of the cooling sleeve, a through hole (34) is arranged in the sleeve body (30), the valve (31) is located between the front seal (32) and the rear seal (33) and close to the front seal (32), the valve (31) is communicated with the through hole (34), the front seal (32) cooperates with the probe to seal the through hole (34), and the rear seal (33) is provided with an air outlet (35), the cooling gas enters through the valve (31) and flows out through the air outlet (35).

5. The on-line maintenance device for blast furnace hot blast stove heat storage body collapse according to claim 1, characterized in that: The blast furnace hot blast stove heat storage body collapse online maintenance device also includes a furnace shell flange (8) and a flange cover plate (9) matched with the furnace shell flange (8), and the flange cover plate (9) is detachably connected to the furnace shell flange (8); The furnace shell flange (8) is connected to the drilling position of the high temperature resistant drilling machine (10) and is used to seal the drilling hole.

6. The on-line maintenance device for the collapse of the heat storage body of the hot blast stove of a blast furnace according to claim 5, characterized in that: The furnace shell flange (8) is provided with a center hole (81), the center hole (81) is coaxially arranged with the drilled hole, and the radius of the center hole (81) is not less than the radius of the drilled hole.

7. The on-line maintenance device for the collapse of the heat storage body of the hot blast stove of a blast furnace according to claim 1, characterized in that: The solidified material conveyor (12) comprises a pump, a high temperature resistant conveying pipeline (13) and a cooling pipe sleeved outside the high temperature resistant conveying pipeline (13), wherein the cooling pipe is sleeved in the drill hole, and the high temperature resistant conveying pipeline (13) conveys the solidified material into the hot blast furnace via the cooling pipe.

8. The on-line maintenance device for the collapse of the heat storage body of the hot blast stove of a blast furnace according to claim 7, characterized in that: The cooling pipe is configured as a circulating water cooling pipe, and the circulating water cooling pipe comprises a cooling pipe body (51), a water inlet pipe (52), and a water outlet pipe (53); the bottom of the cooling pipe body (51) is closed, and the water inlet pipe (52) and the water outlet pipe (53) are located at the front end of the cooling pipe body (51).

9. The on-line repair device for the collapse of the heat storage body of the hot blast stove of a blast furnace according to claim 8, characterized in that: Partitions are arranged at intervals inside the cooling pipe body (51), and the partitions guide cooling water to the bottom of the cooling pipe body (51).

10. A method for using the on-line maintenance device for the collapse of a blast furnace hot blast stove regenerator according to any one of claims 1 to 9, characterized in that: The method of use includes: Step 1: Use the high temperature resistant endoscope (3) to monitor whether the heat storage body collapses in the hot blast furnace; Step 2: using a high temperature resistant drilling machine (10) to drill a hole at the bottom of the collapsed position of the heat storage body to confirm the collapsed boundary of the heat storage body; Step 3: Use a solidifying material conveyor (12) to convey the solidifying material to the bottom of the collapsed position of the thermal storage body to reinforce the foundation of the collapsed area; Step 4: Use the thermal storage body conveyor (4) to add new thermal storage body (5) to the upper hollow area of ​​the thermal storage body collapse site.

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