Dilution cooling type high efficiency hot blast stove

Abstract

The utility model discloses a dilution cooling type high -efficient hot -blast furnace, including furnace body and a plurality of steel sheet, wherein, the input of furnace body is linked with the tail of combustor, a plurality of steel sheets are evenly distributed in the inside of furnace body, and will the furnace body divide into first pass and second pass, wherein, first pass is used for conveying combustion air, and second pass is used for conveying dilution air, steel sheet is layered arrangement along furnace body axis direction, and the circumference diameter that it surrounds is in the ladder type increasing, forms the annular joint crack between adjacent steel sheet, and every steel plate's arc wall surface all is provided with round hole. Therefore, through adding annular fireproof steel plate in the furnace body, can effectively dilute combustion air, significantly reduce hot -blast furnace output end temperature. And steel plate occupies small, compact structure, and is convenient for installation.

Description

Technical Field

[0001] This utility model relates to the technical field of hot blast stoves, and in particular to a dilution-cooling type high-efficiency hot blast stove. Background Technology

[0002] In processes such as metal smelting, nitrogen and phosphate fertilizer production, chemical product manufacturing, concrete mixing, and asphalt heating for road construction, it is often necessary to heat solid materials using high-temperature air or flue gas. To meet these needs, fuel gas (natural gas, refinery gas, chemical tail gas, manufactured gas, etc.) or fuel oil (diesel, etc.) is typically burned in a hot blast stove to generate high-temperature flue gas that directly heats downstream materials. If the process requires the use of pure high-temperature air, a heat exchanger is installed after the hot blast stove to transfer heat from the flue gas to the air through heat exchange, while simultaneously isolating the flue gas. The core of this technology lies in utilizing the heat generated by fuel combustion to efficiently produce high-temperature flue gas or high-temperature air to meet the heating requirements of the aforementioned processes.

[0003] Currently, most existing hot blast stoves use refractory materials lined inside steel cylinders. Because these refractory materials require a furnace drying and insulation process, the preparation time before start-up and shutdown is too long, affecting operational efficiency. In addition, the combustion flame temperature in these furnaces is generally too high, which is not conducive to reducing nitrogen oxide emissions. Furthermore, the refractory materials themselves are heavy, and large kilns must be installed on-site, resulting in long construction periods and difficulties in quality control. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, one objective of this invention is to provide a dilution-cooling type high-efficiency hot blast stove. By adding an annular refractory steel plate inside the stove body, the combustion air can be effectively diluted, significantly reducing the output temperature of the hot blast stove. Furthermore, the steel plate occupies little space, resulting in a compact structure and easy installation.

[0006] To achieve the above objectives, the first aspect of this utility model proposes a dilution-cooling type high-efficiency hot air furnace, comprising a furnace body and multiple steel plates, wherein the input end of the furnace body is connected to the tail end of a burner; the multiple steel plates are evenly distributed inside the furnace body, dividing the furnace body into a first channel and a second channel, wherein the first channel is used to transport combustion air and the second channel is used to transport dilution air; the steel plates are arranged in layers along the axial direction of the furnace body, and the circumference diameter of the circles they form increases in a stepped manner, with circumferential gaps formed between adjacent steel plates, and each steel plate has a circular hole on its arc-shaped wall surface.

[0007] In addition, the dilution-cooling type high-efficiency hot blast furnace proposed in this utility model may also have the following additional technical features:

[0008] Specifically, the steel plate has a ring-shaped structure.

[0009] Specifically, the furnace body is connected to an external fan.

[0010] Specifically, the burner is connected to a fuel delivery pipe.

[0011] Compared with the prior art, the present invention has the following advantages: by setting multiple annular steel plates inside the furnace body, diluted air can be introduced layer by layer, which can not only replenish the oxygen consumed by fuel combustion, but also exchange heat with the flue gas to achieve cooling, effectively control the temperature at the output end of the furnace body, and extend the service life of the hot air furnace. In addition, the steel plates occupy little space, have a compact structure, and are easy to install.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0014] Figure 1 This is a schematic diagram of the structure of a dilution-cooling type high-efficiency hot blast furnace according to an embodiment of the present invention;

[0015] Figure 2 This utility model Figure 2 Enlarged structural diagram of area A in the middle;

[0016] Figure 3 This is a schematic diagram of the structure of the first and second channels in a dilution-cooling type high-efficiency hot blast furnace according to an embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the steel plate structure in a dilution-cooling type high-efficiency hot blast furnace according to an embodiment of the present invention.

[0018] As shown in the figure: 1. Furnace body; 2. Steel plate; 3. Circular seam; 4. Circular hole; 5. First channel; 6. Second channel. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0020] The dilution-cooling type high-efficiency hot air furnace of this utility model is described below with reference to the accompanying drawings.

[0021] like Figures 1 to 4 As shown, the dilution-cooling type high-efficiency hot blast furnace of this utility model embodiment may include a furnace body 1 and multiple steel plates 2.

[0022] The input end of the furnace body 1 is connected to the tail end of the burner.

[0023] It should be noted that, see Figure 1 The left end of the furnace body 1 is the input end, and the right end is the output end. The burner is located in the center of the input end of the furnace body 1. The burner mixes the fuel (gas or liquid) with the air in a certain proportion to ensure that the flame burns continuously and reliably.

[0024] Furthermore, the output end of furnace body 1 is connected to downstream heated equipment, such as drying equipment.

[0025] Multiple steel plates 2 are evenly distributed inside the furnace body 1, dividing the furnace body 1 into a first channel 5 and a second channel 6. The first channel 5 is used to transport combustion air, and the second channel 6 is used to transport dilution air.

[0026] It should be noted that the first channel 5 described in this embodiment is located inside the steel plate 2. After the combustible gas or liquid is burned at the end of the furnace body 1, it forms high-temperature flue gas and is output to the output end (tail) of the furnace body 1. The second channel 6 is set outside the steel plate 2 to cool down the high-temperature flue gas during the conveying process, so as to ensure that the output flue gas temperature is within a controllable range. For example, the flue gas temperature can be reduced from the highest 2000℃ in the flame zone to the required 500℃ at the tail.

[0027] Furthermore, the steel plate 2 is made of heat-resistant steel plate. The steel plate 2 can isolate the high-temperature combustion air from the low-temperature dilution air. The low-temperature dilution air forms a thin film on the inner wall of the steel plate 2, thereby isolating the inner wall of the steel plate 2 from the combustion air and preventing the wall surface from being damaged by overheating due to direct contact with the high-temperature airflow.

[0028] The steel plates 2 are arranged in layers along the axis of the furnace body 1, and the diameter of the circumference they form increases in a stepped manner. A circumferential gap 3 is formed between adjacent steel plates 2, and a circular hole 4 is opened on the arc-shaped wall surface of each steel plate 2.

[0029] It should be noted that the steel plate 2 has a ring-shaped structure, with the ends of two adjacent steel plates 2 nested together, and the diameter of the steel plate 2 increases sequentially from the output end of the furnace body 1 to the output end. Air is introduced layer by layer, which can not only replenish the oxygen consumed by fuel combustion, but also continuously cool the inside of the furnace body 1, improve the service life of the hot air furnace, and reduce manufacturing costs.

[0030] Furthermore, the circumferential slit 3 and the circular hole 4 can introduce dilution air into the first channel 5. At this time, the dilution air exchanges heat with the high-temperature flue gas to achieve the purpose of cooling.

[0031] In one embodiment of this utility model, such as Figure 1 As shown, the furnace body 1 is connected to an external fan. The fan can blow diluted air into the second channel 6 and then into the first channel 5 through the circumferential slit 3 and the round hole 4 to cool the high-temperature flue gas.

[0032] In one embodiment of this utility model, such as Figure 1 As shown, a fuel delivery pipe is connected to the burner, which can deliver fuel to the inside of the burner and fully mix the fuel with air.

[0033] Specifically, personnel deliver fuel and air into the burner. After thorough mixing in the burner, the mixture is delivered to the furnace body 1 and burned at the input end of the furnace body 1, forming high-temperature flue gas. Simultaneously, a fan delivers diluted air into the second channel 6, which then passes through the circumferential slit 3 and the circular hole 4 into the first channel 5, where it exchanges heat with the high-temperature flue gas. As the high-temperature flue gas is transported to the output end, diluted air is introduced layer by layer, replenishing the oxygen consumed by fuel combustion and exchanging heat with the flue gas to achieve cooling. This design effectively controls the temperature at the output end of the furnace body 1, extending the service life of the hot air furnace.

[0034] In summary, the dilution-cooling high-efficiency hot air furnace of this utility model, by setting multiple annular steel plates inside the furnace body, can introduce dilute air layer by layer, which can not only replenish the oxygen consumed by fuel combustion, but also exchange heat with the flue gas to achieve cooling, effectively control the temperature at the furnace output end, and extend the service life of the hot air furnace. In addition, the steel plates occupy little space, have a compact structure, and are easy to install.

[0035] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A dilution-cooling type high-efficiency hot blast furnace, characterized in that, Includes the furnace body and multiple steel plates, among which, The input end of the furnace body is connected to the tail end of the burner; Multiple steel plates are evenly distributed inside the furnace body, dividing the furnace body into a first channel and a second channel, wherein the first channel is used to transport combustion air and the second channel is used to transport dilution air; The steel plates are arranged in layers along the axis of the furnace body, and the circumference diameter of the circles they form increases in a stepped manner. A circumferential gap is formed between adjacent steel plates, and a circular hole is opened on the arc-shaped wall surface of each steel plate.

2. The dilution-cooling type high-efficiency hot blast furnace according to claim 1, characterized in that, The steel plate has a ring-shaped structure.

3. The dilution-cooling type high-efficiency hot blast furnace according to claim 1, characterized in that, The furnace body is connected to an external fan.

4. The dilution-cooling type high-efficiency hot blast furnace according to claim 1, characterized in that, The burner is connected to a fuel delivery pipe.

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