CN214781941U - Grate and hot-blast furnace system - Google Patents
Grate and hot-blast furnace system Download PDFInfo
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- CN214781941U CN214781941U CN202120643095.4U CN202120643095U CN214781941U CN 214781941 U CN214781941 U CN 214781941U CN 202120643095 U CN202120643095 U CN 202120643095U CN 214781941 U CN214781941 U CN 214781941U
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Abstract
The embodiment of the utility model provides a grate and a hot blast stove system, wherein the grate is formed by splicing a plurality of prefabricated grate plates; the prefabricated grate plate is of a plate-shaped structure with a certain thickness; the prefabricated grate plate comprises a plurality of grate holes which are arranged along the vertical direction and penetrate through the upper surface and the lower surface; the grate also comprises one or more upright columns which are arranged in the vertical direction, and the upright columns are of hollow cylinder structures; the prefabricated grate plate is supported by the upright posts; the bottom of the upright post protrudes out of the lower surface of the prefabricated grate plate; and the side wall of the upright post is provided with a vent hole. Through the technical scheme, when the hot blast stove is built, the construction technical requirements are greatly simplified, the working efficiency is improved, and the building cost is reduced.
Description
Technical Field
The utility model relates to a hot-blast furnace technical field, concretely relates to grate and hot-blast furnace system.
Background
Hot blast stoves are increasingly used in ferrous and nonferrous metallurgy, as well as in the field of mineral aggregate calcination, roasting and other industries. In the existing hot blast stove, a metal grate is generally adopted, the grate generally comprises an upper grate plate and a lower support column, and a heat accumulator comprising lattice bricks or a ball type heat accumulator is supported above the grate. The existing grate plate is of an integral structure, and the shape and the size of the outer edge of the grate plate are matched with the inner wall of a hot blast stove
In the process of implementing the present invention, the inventor finds that there are at least the following problems in the prior art:
because the size of the existing grate plate is very close to that of the inner wall of the hot blast stove, the grate plate needs to be integrally hoisted, positioned and fixed in the construction process, the construction process is complex, the technical requirement of the construction process is higher, and the working efficiency is lower when the hot blast stove is constructed.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a grate and hot-blast furnace system through the form that adopts split type grate for work efficiency when improving the hot-blast furnace and building.
In order to achieve the above object, in one aspect, the present invention provides a grate, which is characterized in that the grate is formed by splicing a plurality of prefabricated grate plates; the prefabricated grate plate is of a plate-shaped structure; the prefabricated grate plate comprises a plurality of grate holes which are arranged along the vertical direction and penetrate through the upper surface and the lower surface; the grate also comprises one or more upright columns which are arranged in the vertical direction, and the upright columns are of hollow cylinder structures; the prefabricated grate plate is supported by the upright posts; the bottom of the upright post protrudes out of the lower surface of the prefabricated grate plate; and the side wall of the upright post is provided with a vent hole.
On the other hand, the utility model provides a hot blast stove system, which comprises a plurality of hot blast stoves; the hot blast stove comprises a hot blast stove body, a burner arranged on the hot blast stove body, a combustion chamber and a heat storage chamber which are sequentially arranged below the burner, a hot blast outlet arranged on the side wall of the combustion chamber, a ventilation chamber arranged at the bottom in the hot blast stove body, and a smoke outlet and a cold blast inlet which are respectively arranged on the side wall of the ventilation chamber, wherein the grate is arranged above the ventilation chamber; the combustor comprises a coal gas inlet and a combustion-supporting air inlet which are arranged on the side wall of the combustor; a heat accumulator is also arranged in the heat accumulation chamber and is positioned above the grate;
the gas inlets of the hot blast stoves are connected in parallel; the combustion-supporting air inlets of the hot blast stoves are connected together in parallel; the hot air outlets of the hot air furnaces are connected in parallel; cold air inlets of the hot blast stoves are connected in parallel; the flue gas outlets of the hot blast stoves are connected in parallel.
The technical scheme has the following beneficial effects:
the utility model adopts the mode of 'breaking the whole into parts' to change the integral grate into a split grate, and adopts a plurality of prefabricated grate plates to splice into a grate. The vertical columns are arranged below the prefabricated grate plate, so that the prefabricated grate plate can effectively bear load after being spliced, and the strength of the whole grate cannot be reduced. When the hot blast stove is built, because each prefabricated grate plate has small volume, light weight and convenient carrying, the prefabricated grate plates can be respectively conveyed into the hot blast stove and then spliced, and the traditional processes of integral hoisting, integral positioning assembly and the like are not needed. On the premise of not reducing the service performance, the construction technical requirement is greatly simplified, the working efficiency is improved, and the construction cost is reduced.
In addition, the technical scheme has the following characteristics:
1. utilize the utility model discloses a hot-blast furnace system has still configured flue gas heat exchanger, when realizing flue gas waste heat recovery, can improve the preheating temperature of combustion air and coal gas, effectively improves combustion temperature to can use low heat value fuel such as blast furnace gas to realize the high blast temperature air supply, and needn't use fuel such as coke oven gas of high heat value, reduce the fuel cost.
2. The vent holes on the prefabricated grate plate, which are blocked by the side walls of the stand columns, are all provided with communicating channels to be connected with the unblocked through holes, so that the ventilation efficiency of the through holes of the support plate is hardly influenced, and the problem generally exists in the traditional metal grate plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic side view of a grate formed by splicing prefabricated grate plates according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the prefabricated grate plate and the vertical column in the embodiment of the present invention;
FIG. 3 is a schematic diagram of a blind hole and a horizontal channel in an embodiment of the present invention;
FIG. 4 is a schematic view (in plan view) of the grate assembly according to an embodiment of the present invention;
FIG. 5 is a schematic view (top view) of another embodiment of the present invention;
fig. 6 is a schematic view of an internal structure of a hot blast stove in a hot blast stove system according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the internal structure of another hot blast stove in the hot blast stove system according to the embodiment of the present invention;
FIG. 8 is a schematic diagram of the hot blast stove system according to the embodiment of the present invention;
fig. 9 is a schematic structural diagram of a high-temperature flue gas heat exchanger in an embodiment of the present invention;
reference numerals: 1. a grate; 11. prefabricating a grate plate; 12. a column; 13. grid holes; 131. blind holes; 132. a horizontal channel; 14. a vent hole; 15. a groove; 16. a fixed base; 100 hot blast stove; 20. a hot blast furnace body; 30. a burner; 31. a gas inlet; 32. a combustion air inlet; 40. a combustion chamber; 41. a hot air outlet; 50. a regenerator; 60. a ventilation chamber; 61. a flue gas outlet; 62. a cold air inlet; 70. a heat accumulator; 200. a first high temperature flue gas heat exchanger; 241. a media outlet; 260. a heat exchange inlet; 261. a heat exchange outlet; 262. a media inlet; 270. a heat exchanger heat accumulator; 300. and the second high-temperature flue gas heat exchanger.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, 2, 4 and 5, an embodiment of the present invention provides a grate, which is formed by splicing a plurality of prefabricated grate plates 11; the prefabricated grate plate 11 is of a plate-shaped structure with a certain thickness; the prefabricated grate plate 11 comprises a plurality of grate holes 13 which are arranged along the vertical direction and penetrate through the upper surface and the lower surface; the grate also comprises one or more upright columns 12 arranged in the vertical direction, and the upright columns 12 are hollow cylinder structures; the prefabricated grate plate 11 is supported by the upright columns 12; the bottom of the upright post 12 protrudes out of the lower surface of the prefabricated grate plate 11; the side wall of the upright post 12 is provided with a vent hole 14.
As mentioned above, the grates in the prior art are all integral grate plates, and the grate plates are large in size, close to the inner wall of the hot blast stove and small in fit clearance during construction, so that the grate plates are difficult to hoist and mount. The integral grate is changed into a split grate, a grate plate of the grate is divided into a plurality of small parts, and a plurality of prefabricated grate plates are spliced into the grate. When the hot blast stove is built, because each prefabricated grate plate has small volume, light weight and convenient carrying, the prefabricated grate plates can be respectively conveyed into the hot blast stove and then spliced, and the traditional processes of integral hoisting, integral positioning assembly and the like are not needed. When in use, as shown in fig. 1, 4 and 5, the prefabricated grate plates 11 are spliced together to form the same current situation as the existing metal grate and are arranged in a heat storage chamber of the hot blast stove. Each prefabricated grate plate 11 is prefabricated according to the preset position of each prefabricated grate plate, so that the prefabricated grate plates can be reliably jointed with the adjacent prefabricated grate plates 11; meanwhile, in order to ensure that the spliced grate has good bearing capacity and can reliably bear the weight of the heat accumulator at the upper part of the grate, a supporting part, namely the upright post 12, needs to be arranged at the lower part.
When the hot blast stove needs to use refractory balls as heat accumulators, the upper surface of the grate is preferably a spherical surface with a convex middle part, correspondingly, each prefabricated grate plate 11 is designed to be in a shape with a curved upper surface and a curved lower surface, and when the prefabricated grate plates 11 are spliced into an arch structure, due to the characteristics of the arch structure (extrusion exists between adjacent components), each prefabricated grate plate 11 is not required to be supported from the lower part, so that one or more upright columns 12 are only arranged at proper positions; when the hot blast stove needs to use checker bricks as a heat accumulator, the upper surface of the grate is a plane, correspondingly, each prefabricated grate plate 11 is designed to be of a flat plate structure, and each prefabricated grate plate 11 is supported from the lower part, so that a plurality of upright columns 12 need to be arranged.
Each prefabricated grate plate 11 and the upright post 12 are made into prefabricated parts in a pouring mode.
As shown in FIG. 2, for ventilation, each prefabricated grate plate 11 is provided with grate holes 13 arranged according to a certain rule, the grate holes 13 penetrate through the upper and lower parts of the prefabricated grate plate 11 and are used for communicating a regenerator 50 and a ventilation chamber 60 in a hot blast stove, and the grate holes can be straight round holes, straight holes with other cross-sectional shapes or special-shaped holes. Meanwhile, in order to reduce the shielding of the grate holes 13, the upright columns are made into hollow column structures with open upper ends, which can be hollow cylinders, hollow semicylinders or other types of columns without influencing ventilation, and the side walls of the upright columns are provided with ventilation holes 14, so that the ventilation holes 14 are communicated with the grate holes 13 positioned right above the ventilation holes 14. Thereby providing gas passages for the furnace period and the blast period.
Preferably, the outer contour of the grate is circular;
the upper surface of the grate is a horizontal plane or a spherical curved surface with a convex middle part.
In a conventional regenerative hot blast furnace, a circular grate is also used in the present embodiment because the furnace shell is generally circular and the regenerative chamber is generally circular in cross section, in which case the grate is also circular. As shown in fig. 6, when the hot blast stove adopts a heat accumulator 70 in the form of a checker brick, the upper surface of the grate 1 should be a horizontal plane to facilitate the laying of checker bricks, and at this time, the upper surface of each prefabricated grate plate 11 can also be provided with a corresponding fixing groove for fixing the checker bricks; as shown in fig. 7, when the ball type heat accumulator (refractory ball) is used as the heat accumulator 70, the upper surface of the grate 1 may be a horizontal plane, but is preferably set to be a spherical curved surface with a middle arch to facilitate the cleaning and replacement of the ball type heat accumulator, and at this time, the upper surface of each prefabricated grate plate 11 is prefabricated to be a curved surface with a certain radian, and is combined according to a corresponding sequence during the splicing process to realize the spherical curved surface of the integral grate 1.
Preferably, the outer contour of the prefabricated grate plate 11 is hexagonal, circular, square, rectangular or polygonal with arc sides.
As shown in fig. 4 and 5, the shape and size of the prefabricated grate plate 11 are determined according to specific design requirements, and in order to finally splice a circular outer contour, the shape of each prefabricated grate plate 11 may be different, including a circle, a hexagon or a fan, and the like, or may be a square, and a plurality of prefabricated grate plates prefabricated by refractory materials are spliced into a complete circular or square section matched with the regenerator. For example, in the splicing mode of fig. 4, the prefabricated grate plate 11 adopts a hexagonal form and a polygonal form with arc edges; the splicing mode of fig. 5 adopts a circular form and a fan-shaped form.
Preferably, the vertical columns 12 are connected below the splicing seams of the plurality of prefabricated grate plates 11, or the vertical columns 12 are connected below the prefabricated grate plates 11; the bottom surface of the prefabricated grate plate 11 connected with the upright post 12 is provided with a groove 15 arranged in the vertical direction, the upper part of the upright post 12 is embedded into the groove 15, and the top end surface of the upright post 12 is attached to the bottom surface of the groove 15.
As mentioned above, when the upper surface of the grate is a spherical surface with a convex middle part, the spherical surface is an arch structure formed by splicing the prefabricated grate plates 11, at this time, each prefabricated grate plate 11 is not required to be supported from the lower part, so that only one or more upright posts 12 are arranged at proper positions, for example, an upright post 12 is arranged below the prefabricated grate plate 11 positioned at the middle part as shown in FIG. 7; when the upper surface of the grate is a plane, each prefabricated grate plate 11 is supported from the lower part, and the vertical columns 12 can be arranged below each prefabricated grate plate 11; however, in order to reduce the number of the vertical columns, as shown in fig. 4, the vertical columns 12 can be arranged below the splicing seams of the plurality of prefabricated grate plates 11; or as shown in fig. 5, the two ways of arranging the joints and the prefabricated grate plate 11 are combined, and the vertical columns 12 are designed at proper positions. The arrangement mode of the upright columns 12 is flexible, the arrangement can be carried out on the premise of ensuring the stability according to actual requirements, and the positions and the matching relation with the corresponding prefabricated grate plates 11 are determined at the beginning of the design.
In order to ensure that the prefabricated grate plate 11 and the upright post 12 are stably and relatively fixed and avoid thermal stress or other structural stress from influencing the service life of the support body, an embedded connection mode is adopted in the technical scheme on the combination mode of the upright post 12 and the prefabricated grate plate 11, for example, as shown in figure 2, the technical scheme adopts a method that a groove 15 matched with the cross section shape of the upright post 12 is formed in the prefabricated grate plate 11, and the top end of the upright post 12 is inserted into the groove 15 so as to realize the connection of the prefabricated grate plate and the upright post in an insertion connection mode. The connection mode can ensure the stability of the grate because the two parts are static parts when in use and the prefabricated grate plates 11 of the supporting parts 10 are close to each other when the grate is spliced. The profile of the groove 15 may be circular, semicircular or in other forms, and correspondingly, the profile of the upright post 12 may also be circular, semicircular or in other forms, respectively, so that it can be matched with the groove 15.
Preferably, as shown in fig. 3, the prefabricated grate plate 11 connected with the vertical columns 12 further comprises blind holes 131, the tops of the blind holes 131 are communicated with the upper surface of the prefabricated grate plate 11, and the bottoms of the blind holes 131 are shielded or partially shielded by the side walls at the top ends of the vertical columns 12; the side wall of the blind hole 131 is provided with a horizontal channel 132 communicated with the adjacent grid holes 13.
When a plurality of grate holes 13 are arranged on the prefabricated grate plate 11 according to a certain rule, the situation often occurs: the bottom opening of the part of the grate holes is positioned in the groove 15 and is just positioned above the side wall at the top end of the upright post 12. At the moment, the side wall shields the grid holes to prevent the grid holes from ventilating normally, and the holes are called blind holes 131; the bottom of the blind hole 131 is blocked by the sidewall of the pillar 12. Based on this, the blind holes 131 can be defined as required, for example, the blind holes 131 are defined as grid holes with a shielding area of more than 50%. In order to avoid the reduction of the ventilation efficiency caused by the blind holes 131, the scheme adopts a mode of additionally arranging the horizontal pore channels 132 to connect the blind holes 131 with the adjacent normal grate holes 13, so that the adverse effect caused by the condition is avoided as much as possible.
Preferably, each upright post 12 is provided with a plurality of vent holes 14, and the vent holes 14 are uniformly distributed along the axis of the upright post 12; the bottom of the upright post 12 is also provided with a fixed base 16; the fixed base 16 is fixedly connected with the upright post 12 or made into a whole.
As shown in fig. 1 and 2, the vent holes 14 are located on the side walls of the upright post 12, and since the upright post 12 has a generally symmetrical structure along the axis, a plurality of symmetrical vent holes 14 may be uniformly distributed on the side surfaces thereof to improve the ventilation efficiency. The vent hole 14 may be a circular hole, or may be a long circular hole or an opening with another shape as required. For stability, each of the pillars 12 should be fixed to the bottom of the inside of the hot blast stove, and thus a fixing base 16 is provided at the bottom of the pillar 12. The fixed base 16 may be an integral structure with the upright 12 or a separate structure connected by plug-in connection. In practical application, the base 16 can be fixed to the bottom of the hot blast stove in a pre-embedded manner.
As shown in fig. 8, the present invention provides a top-combustion hot blast stove system, which comprises a plurality of hot blast stoves 100 (wherein, in the most common configuration of hot blast stove system, the number of hot blast stoves is two, three, or four); as shown in fig. 6 and 7, the hot blast stove 100 includes a hot blast stove body 20, a burner 30 disposed on the top of the hot blast stove body 20, a combustion chamber 40 and a heat storage chamber 50 sequentially disposed below the burner 30, a hot blast outlet 41 disposed on the side wall of the combustion chamber 40, a ventilation chamber 60 disposed on the bottom of the hot blast stove body 20, and a flue gas outlet 61 and a cold blast inlet 62 respectively disposed on the side wall of the ventilation chamber 60, and the aforementioned grate 1 is disposed above the ventilation chamber 60; the burner 30 comprises a gas inlet 31 and a combustion air inlet 32 which are arranged on the side wall of the burner; a heat accumulator 70 is also arranged in the heat accumulation chamber 50, and the heat accumulator 70 is positioned above the grate 1;
the gas inlets 31 of the plurality of hot blast stoves 100 are connected in parallel; the combustion air inlets 32 of the plurality of hot blast stoves 100 are connected in parallel; the hot air outlets 41 of the hot air furnaces 100 are connected in parallel; the cold air inlets 62 of the plurality of hot blast stoves 100 are connected in parallel; the flue gas outlets 61 of the plurality of hot blast stoves 100 are connected in parallel.
In order to achieve the purpose of the technical scheme, the hot blast stoves are all provided with the grate, and only two hot blast stoves can be arranged in the manner shown in figure 8 in terms of the number of the hot blast stoves. However, in general practical production, in order to improve efficiency, a hot blast stove system is often composed of 3 or 4 heat accumulating type hot blast stoves, and the process pipeline interfaces of the hot blast stove system are connected together in a parallel connection mode, for example: when the heat accumulating type hot blast stove group consisting of 3 heat accumulating type hot blast stoves is adopted, a working system of 'two burning and one feeding' (namely two hot blast stoves are in burning and one hot blast stove supplies air at the same time) is adopted, and when the heat accumulating type hot blast stove group consisting of 4 heat accumulating type hot blast stoves is adopted, a working system of 'two burning and two feeding' (namely two hot blast stoves are in burning and two hot blast stoves supply air at the same time) is adopted. In order to implement the functions of these working systems, auxiliary facilities and devices such as valves and control systems are required, and although these auxiliary facilities and devices are necessary for implementing the present invention, they are not within the technical innovation scope of the present application and are not shown. In practice, the utility model proposes to adopt as sophisticated a technique as possible in configuring these necessary accessories and equipment.
Preferably, the fixed base 16 is embedded in the casting material at the bottom of the hot blast stove body 20; the burner 30 is a ceramic burner; the heat accumulator 70 includes a checker brick or a ball type heat accumulator (refractory ball).
The fixed base 16 is embedded in the furnace bottom castable, so that the grate 1 is connected with the furnace bottom of the hot blast furnace body 20; as shown in fig. 6 and 7, the heat storage body 70 is located in the heat storage chamber 50, and the heat storage body 70 adopts two methods which are most commonly used at present: in the form of checker bricks in fig. 6, or in the form of ball regenerators in fig. 7.
Preferably, as shown in fig. 8, the hot blast stove system further includes a first high-temperature flue gas heat exchanger 200 and a second high-temperature flue gas heat exchanger 300; the flue gas outlet 61 is connected to the heat exchange inlet 260 of the first high-temperature flue gas heat exchanger 200 through a pipeline; the heat exchange outlet 261 of the first high temperature flue gas heat exchanger 200 is connected to the heat exchange inlet 260 of the second high temperature flue gas heat exchanger 300 through a pipeline; the medium outlet 241 of the first high-temperature flue gas heat exchanger 200 is connected to the combustion air inlet 32 through a pipeline; the medium outlet 241 of the second high temperature flue gas heat exchanger 300 is connected to the gas inlet 31 through a pipeline.
When the system is only provided with the heat accumulating type hot blast stove set, the waste heat of the high-temperature flue gas discharged by the hot blast stove 100 can not be utilized. Therefore, a high-temperature flue gas heat exchanger is needed to be configured for reducing the temperature of the flue gas discharged by the hot blast stove to meet the emission requirement; the other function of the high-temperature flue gas heat exchanger is to recycle the waste heat of the hot blast stove 100 for preheating combustion air and preheating coal gas, so that the fuel consumption can be reduced. In the embodiment equipped with the high-temperature flue gas heat exchanger, the first high-temperature flue gas heat exchanger 200 is a regenerative heat exchanger (the structure of the high-temperature flue gas heat exchanger is shown in fig. 9), and is used for preheating combustion air; the second high temperature flue gas heat exchanger 300 is used to preheat the gas. The working process of the embodiment is as follows: in the burning period, high-temperature flue gas discharged by the hot blast stove enters the first high-temperature flue gas heat exchanger 200 from the heat exchange inlet 260 to heat the heat exchanger heat accumulator 270 in the first high-temperature flue gas heat exchanger, is discharged from the heat exchange outlet 261 to enter the second high-temperature flue gas heat exchanger 300 after being cooled, and is discharged from the second high-temperature flue gas heat exchanger 300 after being subjected to the same process; in the heat exchange period, combustion-supporting air and coal gas respectively enter the heat exchangers from the medium inlets 262 of the two high-temperature flue gas heat exchangers, are heated by the heat accumulator and then are respectively discharged from the medium outlets 241, and enter the combustion chamber of the hot blast stove through the coal gas inlet 31 and the combustion-supporting air inlet 32 for burning. The second high-temperature flue gas heat exchanger 300 can also adopt a heat pipe heat exchanger.
In addition, according to the design requirements of the high-temperature air temperature and the heat accumulating type hot blast stove system, because the flue gas discharged from the first high-temperature flue gas heat exchanger is cooled, the second high-temperature flue gas heat exchanger 300 can be replaced by a dividing wall type heat exchanger, or a coal gas preheater is not required.
Furthermore, according to conventional experience, when the hot blast stove system is composed of 3 or 4 hot blast stoves 100, as a preferred scheme, the first high temperature flue gas heat exchanger 200 for preheating the combustion air may be composed of a set (two) of heat accumulating type high temperature flue gas heat exchangers, which use a working regime of "one burning and one feeding" (i.e., one heats the heat accumulator with hot flue gas, and the other heats the combustion air by releasing heat).
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The grate is characterized in that the grate is formed by splicing a plurality of prefabricated grate plates (11); the prefabricated grate plate (11) is of a plate-shaped structure; the prefabricated grate plate (11) comprises a plurality of grate holes (13) which are arranged along the vertical direction and penetrate through the upper surface and the lower surface;
the grate also comprises one or more upright columns (12) arranged in the vertical direction, and the upright columns (12) are of hollow cylinder structures; the prefabricated grate plate (11) is supported by the upright columns (12); the bottom of the upright column (12) protrudes out of the lower surface of the prefabricated grate plate (11);
the side wall of the upright post (12) is provided with a vent hole (14).
2. The fire grate of claim 1, wherein the outer profile of the grate is circular;
the upper surface of the grate is a horizontal plane or a spherical curved surface with a convex middle part.
3. The fire grate of claim 1,
the outer contour of the prefabricated grate plate (11) is hexagonal, circular, square, rectangular or polygonal with arc sides.
4. The fire grate of claim 1,
the upright columns (12) are connected below splicing seams of the prefabricated grate plates (11), or the upright columns (12) are connected below the prefabricated grate plates (11);
the bottom surface of the prefabricated grate plate (11) connected with the upright columns (12) is provided with a groove (15) arranged in the vertical direction, the upper parts of the upright columns (12) are embedded into the groove (15), and the top end surfaces of the upright columns (12) are attached to the bottom surface of the groove (15).
5. The grate according to claim 4, characterized in that the prefabricated grate plate (11) connected with the vertical columns (12) further comprises blind holes (131), the top parts of the blind holes (131) are communicated with the upper surface of the prefabricated grate plate (11), and the bottom parts of the blind holes (131) are shielded by the side walls at the top ends of the vertical columns (12); the side wall of the blind hole (131) is provided with a horizontal channel (132) communicated with the adjacent grate holes (13).
6. The fire grate of claim 1,
each upright post (12) is provided with a plurality of vent holes (14), and the vent holes (14) are uniformly distributed along the axis of the upright post (12);
the bottom of the upright post (12) is also provided with a fixed base (16);
the fixed base (16) is fixedly connected with the upright post (12).
7. A hot blast stove system, characterized by comprising a plurality of hot blast stoves (100); the hot blast stove (100) comprises a hot blast stove body (20), a burner (30) arranged at the top of the hot blast stove body (20), a combustion chamber (40) and a heat storage chamber (50) which are sequentially arranged below the burner (30), a hot blast outlet (41) arranged on the side wall of the combustion chamber (40), a ventilation chamber (60) arranged at the bottom in the hot blast stove body (20), and a flue gas outlet (61) and a cold air inlet (62) which are respectively arranged on the side wall of the ventilation chamber (60); above the ventilation chamber (60) a grate (1) according to any of claims 1-6 is arranged; the burner (30) comprises a coal gas inlet (31) and a combustion air inlet (32) which are arranged on the side wall of the burner; a heat accumulator (70) is also arranged in the heat accumulation chamber (50), and the heat accumulator (70) is positioned above the grate (1);
the gas inlets (31) of the hot blast stoves (100) are connected in parallel; the combustion air inlets (32) of the plurality of hot blast stoves (100) are connected together in parallel; the hot air outlets (41) of the hot air furnaces (100) are connected in parallel; cold air inlets (62) of the plurality of hot blast stoves (100) are connected together in parallel; the flue gas outlets (61) of the hot blast stoves (100) are connected in parallel.
8. The hot blast stove system according to claim 7,
the fixed base (16) is embedded into the casting material at the bottom of the hot blast stove body (20);
the burner (30) is a ceramic burner;
the heat accumulator (70) comprises a checker brick or a ball type heat accumulator.
9. The hot blast stove system according to claim 7, further comprising a first high temperature flue gas heat exchanger (200) and a second high temperature flue gas heat exchanger (300); the flue gas outlet (61) is connected to a heat exchange inlet (260) of the first high-temperature flue gas heat exchanger (200) through a pipeline; the heat exchange outlet (261) of the first high-temperature flue gas heat exchanger (200) is connected to the heat exchange inlet (260) of the second high-temperature flue gas heat exchanger (300) through a pipeline; the medium outlet (241) of the first high-temperature flue gas heat exchanger (200) is connected to the combustion air inlet (32) through a pipeline; the medium outlet (241) of the second high-temperature flue gas heat exchanger (300) is connected to the coal gas inlet (31) through a pipeline.
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| CN202120643095.4U CN214781941U (en) | 2021-03-30 | 2021-03-30 | Grate and hot-blast furnace system |
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| CN202120643095.4U CN214781941U (en) | 2021-03-30 | 2021-03-30 | Grate and hot-blast furnace system |
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| CN214781941U true CN214781941U (en) | 2021-11-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136471A (en) * | 2021-03-30 | 2021-07-20 | 北京卡卢金热风炉技术有限公司 | High-temperature-resistant grate, hot blast stove system and method for heating medium-temperature air |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136471A (en) * | 2021-03-30 | 2021-07-20 | 北京卡卢金热风炉技术有限公司 | High-temperature-resistant grate, hot blast stove system and method for heating medium-temperature air |
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