Internal combustion type hot blast stove
By installing guide plates in the gas and air channels of the internal combustion hot blast stove to change the airflow direction, the problems of partition wall tilting, leakage and collapse were solved, and the stability and safety of the equipment were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-04-10
AI Technical Summary
In internal combustion hot blast stoves, the partition wall between the combustion chamber and the regenerator is prone to tilting, leakage, short circuits, or even collapse, mainly due to the impact of airflow at the gas and air inlets.
By installing baffles in the gas and air channels, the airflow direction is changed, reducing the vertical impact force on the partition wall. The impact force is converted into tangential flow through the arc surface design, reducing damage to the partition wall.
It effectively reduces the risks of partition wall tilting, leakage, and collapse, and improves the stability and safety of the equipment.
Smart Images
Figure CN224105847U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to blast furnace metallurgical equipment technical field especially relates to a internal combustion hot blast stove. BACKGROUND
[0002] At present, the hot blast stove of blast furnace mainly has three structure forms of top combustion hot blast, internal combustion hot blast stove and external combustion hot blast stove, and the internal combustion hot blast stove is a heating equipment for improving the blast temperature. SUMMARY
[0003] The internal combustion hot blast stove provided by the application improves the technical problem that the partition wall between the combustion chamber and the regenerator chamber is easily inclined, leaks, short-circuits or even collapses in the related art.
[0004] The embodiment of the application provides an internal combustion hot blast stove, which comprises:
[0005] The hot blast stove body has a chamber;
[0006] The first partition wall is arranged in the chamber to divide the chamber into a combustion chamber and a regenerator chamber;
[0007] The burner has a gas passage and a gas inlet, the gas passage is arranged in the combustion chamber and is arranged close to the first partition wall, and the gas inlet is arranged on the side of the gas passage away from the first partition wall;
[0008] The burner comprises a gas deflector plate arranged in the gas passage close to the side of the first partition wall, the gas deflector plate is arranged correspondingly to the gas inlet, and the gas deflector plate can change the jet direction of the gas entering the gas inlet.
[0009] In some embodiments, the side of the gas deflector plate close to the gas inlet is an arc surface.
[0010] In some embodiments, the burner comprises a gas pipe, the gas pipe is communicated with the gas inlet, and the diameter of the arc surface of the gas deflector plate is greater than or equal to 1 / 4-1 / 5 of the diameter of the gas pipe.
[0011] In some embodiments, the burner further comprises a gas regulating valve, and the gas regulating valve is arranged on the gas pipe.
[0012] In some embodiments, the burner has an air channel and an air inlet communicating with the air channel, and further comprises a second partition wall and an air deflector.
[0013] The second partition wall is installed in the combustion chamber and spaced apart from the first partition wall, the air channel is arranged in the combustion chamber and adjacent to the second partition wall, the air inlet is arranged on a side of the air channel away from the second partition wall, and the air deflector is arranged on a side of the air channel close to the second partition wall and corresponds to the air inlet, and the air deflector can change the jet direction of the air entering from the air inlet.
[0014] In some embodiments, the side of the air deflector close to the air inlet is arc-shaped.
[0015] In some embodiments, the burner comprises an air pipe communicating with the air inlet, and the diameter of the arc-shaped surface of the air deflector is greater than or equal to 1 / 4-1 / 5 of the diameter of the air pipe.
[0016] In some embodiments, the burner further comprises an air regulating valve arranged in the air pipe.
[0017] In some embodiments, the burner further comprises a grid arranged in the combustion chamber and above the air channel and the gas channel, the grid comprises a first grid part and a second grid part, the first grid part comprises a plurality of gas channels, the second grid part comprises a plurality of air channels, and the plurality of gas channels and the plurality of air channels are arranged alternately.
[0018] In some embodiments, the internal combustion hot blast stove further comprises a drain pipe arranged at the bottom of the combustion chamber and communicating with the gas channel.
[0019] The application has the following advantages:
[0020] In the internal combustion hot blast stove provided by the application, the side of the gas channel close to the first partition wall is provided with a gas deflector, the gas deflector corresponds to the gas inlet, and the gas deflector can change the jet direction of the gas entering from the gas inlet, so that the jet direction of the gas is deflected under the deflection of the gas deflector, the jet direction of the gas is as far as possible to avoid being perpendicular to the first partition wall, the impact force of the gas on the first partition wall is reduced, and the situation that the first partition wall is easily inclined, leaks, short-circuits or even collapses is improved. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings described below are only some of the embodiments of the present application, not all the embodiments.
[0022] Figure 1 A structure diagram of the internal combustion hot blast stove is shown.
[0023] Figure 2 A structure diagram of the internal combustion hot blast stove is shown. Figure 1 A local enlarged view of A in the structure diagram of the internal combustion hot blast stove is shown.
[0024] Figure 3 A local enlarged view of B in the structure diagram of the internal combustion hot blast stove is shown. Figure 1 A local enlarged view of B in the structure diagram of the internal combustion hot blast stove is shown.
[0025] Figure 4 An A-A sectional view of the internal combustion hot blast stove is shown. Figure 1 An A-A sectional view of the internal combustion hot blast stove is shown.
[0026] Explanation of reference signs:
[0027] 10 - internal combustion hot blast stove, 100 - hot blast stove body, 110 - chamber, 111 - combustion chamber, 112 - heat storage chamber, 120 - dome, 200 - first partition wall, 300 - burner, 310 - gas passage, 311 - gas inlet, 320 - gas guide plate, 330 - gas pipe, 331 - gas regulating valve, 332 - gas combustion valve, 333 - gas cut-off valve, 340 - air passage, 341 - air inlet, 350 - air guide plate, 360 - air pipe, 361 - air regulating valve, 362 - air combustion valve, 400 - grating piece, 410 - first grating part, 411 - gas flow channel, 420 - second grating part, 421 - air flow channel, 500 - water drain pipe, 600 - pouring layer, 700 - hot blast valve, 800 - cold blast valve, 900 - second partition wall. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0029] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition and the like between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.
[0030] In the utility model, unless another definite provision and limitation, the terms "connect", "fix" and so on should do the broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated; can be mechanical connection, also can be electrical connection; can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication inside two elements or the interaction relationship of two elements, unless another definite limitation. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0031] In addition, in the utility model, the description such as "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0032] At present, the blast furnace hot blast stove mainly has three structural forms of top combustion type hot blast, internal combustion type hot blast stove and external combustion type hot blast stove, and the internal combustion type hot blast stove is a heating equipment for improving the blast temperature. The blast furnace gas is used for burning the stove, the gas and the combustion air (working pressure 12KPa) enter the combustion chamber of the hot blast stove for combustion, and the combustion is stopped after the heat storage refractory checker bricks in the hot blast stove are heated to a certain temperature. In this process, the fire is usually burned for 120 minutes, and the blast is sent for 60 minutes. The blast process is that the cold blast from the blast furnace blower enters from the bottom of the hot blast stove, is heated by the seven-hole bricks in the stove from bottom to top, and the temperature is rapidly increased to about 1200 DEG C, becomes hot blast, and is sent into the blast furnace through the hot blast valve, the hot blast pipeline and the related facilities. 3
[0033] The internal combustion type hot blast stove includes a heat storage chamber and a combustion chamber. When the gas is introduced into the combustion chamber, the gas flow impact of the gas inlet causes the inclined wall between the combustion chamber and the heat storage chamber, the leakage, the short circuit or even the collapse. In order to improve the above problems to a certain extent, the embodiment of the application provides an internal combustion type hot blast stove, which can reduce the impact force of the gas on the inclined wall between the combustion chamber and the heat storage chamber, and improve the situation that the inclined wall is inclined, leaks, short-circuits or even collapses.
[0034] The embodiments of the application will be described below with reference to the drawings:
[0035] Please refer to Figure 1 andFigure 2 The embodiment of the present application provides an internal combustion hot blast stove 10, which comprises a hot blast stove body 100, a first partition wall 200 and a burner 300. The hot blast stove body 100 has a cavity 110, the first partition wall 200 is arranged in the cavity 110, so that the cavity 110 is divided into a combustion chamber 111 and a regenerative chamber 112, the burner 300 has a gas passage 310 and a gas inlet 311 in communication with the gas passage 310, the gas passage 310 is arranged in the combustion chamber 111 and is arranged in close proximity to the first partition wall 200, and the gas inlet 311 is arranged on a side of the gas passage 310 away from the first partition wall 200.
[0036] The burner 300 comprises a gas flow guide plate 320 arranged in the gas passage 310 and close to the first partition wall 200, the gas flow guide plate 320 is arranged in correspondence with the gas inlet 311, and the gas flow guide plate 320 can change the jet direction of the gas entering from the gas inlet 311.
[0037] The hot blast stove body 100 is a basic component of the internal combustion hot blast stove 10, and is used for providing installation and protection for at least other components of the internal combustion hot blast stove 10. The cavity 110 is formed in the hot blast stove body 100, the first partition wall 200 divides the cavity 110 into the combustion chamber 111 and the regenerative chamber 112, at least part of the burner 300 is arranged in the combustion chamber 111 and is used for combusting gas and air, the regenerative chamber 112 is provided with regenerative refractory checker bricks, and the cold blast valve 800 is in communication with the regenerative chamber 112, so as to send cold blast into the regenerative chamber 112. The top of the hot blast stove body 100 is a dome 120, high-temperature flames generated by the mixed combustion of gas and air in the burner 300 are reversely given to the checker bricks of the regenerative chamber 112 along the dome 120, so as to heat the cold blast and become hot blast, and finally the hot blast is sent into a blast furnace through facilities such as the hot blast valve 700.
[0038] The burner 300 has the gas passage 310 and the gas inlet 311 in communication with the gas passage 310, the gas inlet 311 is used for passing gas into the gas passage 310, the gas passage 310 is arranged in close proximity to the first partition wall 200, that is, the outer wall of the gas passage 310 contacts the first partition wall 200, and the gas inlet 311 is arranged on a side of the gas passage 310 away from the first partition wall 200, so as to facilitate connection with an external pipeline.
[0039] The gas guide plate 320 is arranged corresponding to the gas inlet 311 and is made of a formwork pouring refractory material. The gas guide plate 320 can change the jet direction of the gas entering from the gas inlet 311, so that the jet direction of the gas is deflected under the guide effect of the gas guide plate 320, and the jet direction of the gas is as far as possible not perpendicular to the first partition wall 200, thereby reducing the impact force of the gas on the first partition wall 200 and improving the situation that the first partition wall 200 is easily inclined, leaks, short-circuits or even collapses.
[0040] In some embodiments, the side of the gas guide plate 320 close to the gas inlet 311 is arc-shaped.
[0041] That is, the gas flow of the gas inlet 311 will impact the arc surface of the gas guide plate 320. When the high-speed gas flow enters the gas passage 310 from the gas inlet 311, the reflection impact pressure is generated by directly impacting the inner wall of the gas passage 310, and the arc surface can change the gas flow direction to convert the concentrated impact force into tangential flow, so that the gas flow diffuses along the arc surface, thereby reducing the impact on the first partition wall 200.
[0042] Of course, the side of the gas guide plate 320 close to the gas inlet 311 can also be inclined, jagged or spiral-shaped, which can change the jet direction of the gas flow, and the present application is not limited in this respect.
[0043] In some embodiments, the burner 300 comprises a gas pipe 330, the gas pipe 330 is in communication with the gas inlet 311, and the diameter of the arc surface of the gas guide plate 320 is greater than or equal to 1 / 4-1 / 5 of the diameter of the gas pipe 330.
[0044] The gas pipe 330 is used for conveying gas, and the gas pipe 330 is in communication with the gas inlet 311, so that the gas can be introduced into the gas passage 310 through the gas inlet 311.
[0045] If the diameter of the arc surface of the gas guide plate 320 is too small (too curved), the gas flow separates to generate new turbulent flow, and if the diameter of the arc surface of the gas guide plate 320 is too large (too flat), the guide effect is insufficient. Therefore, through a large number of experimental studies, it is found that when the diameter of the arc surface of the gas guide plate 320 is greater than or equal to 1 / 4-1 / 5 of the diameter of the gas pipe 330, the guide effect is optimal.
[0046] In some embodiments, the burner 300 further comprises a gas regulating valve 331, and the gas regulating valve 331 is arranged on the gas pipe 330.
[0047] The gas regulating valve 331 can be used to regulate the gas flow into the gas passage 310. In the moment of opening the gas, the gas regulating valve 331 can be opened to one third of the full opening, and the electric connection can be gradually increased to the full opening after two minutes, so as to reduce the impact of the gas flow on the first partition wall 200 in the moment of opening, and further reduce the damage to the first partition wall 200. Of course, the gas pipe 330 is also provided with a gas combustion valve 332 and a gas cut-off valve 333.
[0048] Please refer to Figure 1 and Figure 3 In some embodiments, the burner 300 has an air passage 340 and an air inlet 341 communicating with the air passage 340, and further comprises a second partition wall 900 and an air deflector 350. The second partition wall 900 is installed in the combustion chamber 111 and is arranged in a spaced manner with the first partition wall 200. The air passage 340 is arranged in the combustion chamber 111 and is arranged in close proximity to the second partition wall 900. The air inlet 341 is arranged on the side of the air passage 340 away from the second partition wall 900. The air deflector 350 is arranged on the side of the air passage 340 close to the second partition wall 900, and is arranged in correspondence with the air inlet 341. The air deflector 350 can change the jet direction of the air entering through the air inlet 341.
[0049] The second partition wall 900 is used to separate the air passage 340 and the gas passage 310, and the air inlet 341 is arranged above the gas inlet 311. When the air enters through the air inlet 341, the air flow will also cause a great impact on the second partition wall 900, thereby causing damage to the second partition wall 900. Therefore, the air deflector 350 is arranged on the side of the air passage 340 close to the second partition wall 900. The air deflector 350 has the same principle as the gas deflector 320. Under the deflection of the air deflector 350, the jet direction of the air can be deflected, so as to avoid the jet direction of the air being perpendicular to the first partition wall 200 as much as possible, thereby reducing the impact force of the air on the first partition wall 200, and improving the situation that the first partition wall 200 is easy to be inclined, leak, short-circuit or even collapse.
[0050] In some embodiments, the side of the air deflector 350 close to the air inlet 341 is arc-shaped.
[0051] That is, the air flow of the air inlet 341 will impact the arc surface of the air deflector 350. When the high-speed air flow enters the air passage 340 from the air inlet 341, the direct impact on the inner wall of the air passage 340 will generate a reflected impact pressure. The arc surface can change the direction of the air flow, convert the concentrated impact force into tangential flow, diffuse the air flow along the arc surface, and reduce the local pressure, thereby reducing the impact on the first partition wall 200.
[0052] Of course, the side of the air deflector 350 close to the air inlet 341 can also be inclined, jagged or helical, which can change the jet direction of the air flow, and is not limited in this regard.
[0053] In some embodiments, the burner 300 further comprises an air pipe 360, which is in communication with the air inlet 341, and the diameter of the arc surface of the air deflector 350 is greater than or equal to 1 / 4-1 / 5 of the diameter of the air pipe 360.
[0054] The air pipe 360 is used to transport air, and is in communication with the air inlet 341, so that air can be introduced into the air passage 340 through the air inlet 341.
[0055] If the diameter of the arc surface of the air deflector 350 is too small (too curved), the air flow separates to generate new turbulent flow, and if the diameter of the arc surface of the air deflector 350 is too large (too flat), the deflection effect will be insufficient. Therefore, through a large number of experimental studies, it is found that when the diameter of the arc surface of the air deflector 350 is greater than or equal to 1 / 4-1 / 5 of the diameter of the air pipe 360, the deflection effect is optimal.
[0056] In some embodiments, the burner 300 further comprises an air regulating valve 361, which is arranged on the air pipe 360.
[0057] The air regulating valve 361 can be used to regulate the air flow entering the air passage 340. In the air opening moment, the air regulating valve 361 can be opened to one third of the opening degree, and after two minutes, the electric connection is gradually increased to the full opening degree, so that the impact of the air flow on the first partition wall 200 in the moment can be reduced, and the damage to the first partition wall 200 is further reduced. Of course, the air pipe 360 is also provided with an air combustion valve 362.
[0058] Please refer to Figure 1 and Figure 4 In some embodiments, the burner 300 further comprises a grid 400, which is arranged in the combustion chamber 111 and located above the air passage 340 and the gas passage 310. The grid 400 comprises a first grid part 410 and a second grid part 420, the first grid part 410 comprises a plurality of gas flow channels 411, and the second grid part 420 comprises a plurality of air flow channels 421, and the plurality of gas flow channels 411 and the plurality of air flow channels 421 are arranged alternately.
[0059] The grid 400 is used to uniformly disperse the gas and air to the upper combustion area, to ensure uniform distribution of the flame and to avoid local high temperature or incomplete combustion.
[0060] Due to the multiple gas flow channels 411 and the multiple air flow channels 421 being staggered, the gas and air are staggered upward in the grid 400, which achieves full cross flow of the air and gas, and full combustion in the upper burners.
[0061] Please refer to Figure 1 In some embodiments, the internal combustion hot blast stove 10 further comprises a drain pipe 500, which is arranged at the bottom of the combustion chamber 111 and communicates with the gas passage 310.
[0062] Condensed water is generated in the gas passage 310, and since the drain pipe 500 is arranged at the bottom of the combustion chamber 111 and communicates with the gas passage 310, the water in the gas passage 310 can be discharged through the drain pipe 500, and regular water discharge through the burning state can improve the corrosion of humidity on the refractory material, steel structure, etc.
[0063] Specifically, the bottom of the combustion chamber 111 can be provided with a cast layer 600, the burner 300 is arranged on the cast layer 600, and the drain pipe 500 is arranged in the cast layer 600 and extends to the outside of the combustion chamber 111. The cast layer 600 is manufactured by using the whole castable, which is used to support the whole weight of the burner 300 and also used to withstand the huge impact force on the partition wall generated by the cold blast valve 800 when it is opened, and the cast layer 600 can effectively prevent gas leakage.
[0064] Although the preferred embodiments of the present application have been described, those skilled in the art who have the basic inventive concept can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to include the preferred embodiments and all changes and modifications falling within the scope of the present application.
[0065] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.
Claims
1. An internal combustion hot blast stove, characterized in that The utility model relates to a hot -blast stove, including: Hot blast stove body has chamber; First partition wall is arranged in the chamber to divide the chamber into combustion chamber and heat storage room; Combustor has gas channel and gas inlet with the gas channel intercommunication, the gas channel is arranged in the combustion chamber and is arranged in close proximity with the first partition wall, the gas inlet is arranged on the side of the gas channel away from the first partition wall; Wherein, the combustor includes gas deflector, which is arranged in the gas channel close to the side of the first partition wall, the gas deflector is arranged corresponding to the gas inlet, the gas deflector can change the jet direction of the gas entering from the gas inlet.
2. The internal combustion hot blast stove according to claim 1, characterized in that The side of the gas deflector close to the gas inlet is arc surface.
3. The internal combustion hot blast stove according to claim 2, characterized in that The combustor includes a gas pipe, the gas pipe is communicated with the gas inlet, the diameter of the arc surface of the gas deflector is greater than or equal to 1 / 4-1 / 5 of the diameter of the gas pipe.
4. The internal combustion hot blast stove according to claim 3, characterized in that The combustor further includes a gas regulating valve, and the gas regulating valve is arranged in the gas pipe.
5. The internal combustion hot blast stove according to claim 1, characterized in that The combustor has an air channel and an air inlet communicated with the air channel, and further includes a second partition wall and an air deflector; The second partition wall is installed in the combustion chamber and is arranged in close proximity with the first partition wall, the air channel is arranged in the combustion chamber and is arranged in close proximity with the second partition wall, the air inlet is arranged on the side of the air channel away from the second partition wall, the air deflector is arranged in the air channel close to the side of the second partition wall, the air deflector is arranged corresponding to the air inlet, and the air deflector can change the jet direction of the air entering from the air inlet.
6. The internal combustion hot blast stove according to claim 5, characterized in that The side of the air deflector close to the air inlet is arc surface.
7. The internal combustion hot blast stove according to claim 6, characterized in that The combustor includes an air pipe, the air pipe is communicated with the air inlet, the diameter of the arc surface of the air deflector is greater than or equal to 1 / 4-1 / 5 of the diameter of the air pipe.
8. The internal combustion hot blast stove according to claim 7, characterized in that The combustor further includes an air regulating valve, and the air regulating valve is arranged in the air pipe.
9. The internal combustion hot blast stove according to claim 5, characterized in that The combustor further includes a grid, which is arranged in the combustion chamber and located above the air channel and the gas channel;The grid includes a first grid part and a second grid part, the first grid part includes a plurality of gas flow channels, and the second grid part includes a plurality of air flow channels, and the plurality of gas flow channels and the plurality of air flow channels are arranged alternately.
10. An internal combustion hot blast stove according to any one of claims 1 - 9, characterized in that The internal combustion hot blast stove further includes a drain pipe, and the drain pipe is arranged at the bottom of the combustion chamber and communicated with the gas channel.