CN211367621U - Top combustion hot blast stove with tapered regenerative chamber - Google Patents
Top combustion hot blast stove with tapered regenerative chamber Download PDFInfo
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- CN211367621U CN211367621U CN201922143327.5U CN201922143327U CN211367621U CN 211367621 U CN211367621 U CN 211367621U CN 201922143327 U CN201922143327 U CN 201922143327U CN 211367621 U CN211367621 U CN 211367621U
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- regenerator
- tapered
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- checker bricks
- combustion
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Abstract
The utility model discloses a tapered top combustion formula hot-blast furnace is taken to regenerator, include combustor (1), combustion chamber (2), regenerator (3) and gas distribution room (4) that set gradually from the top down, the internal diameter of regenerator (3) reduces along the direction from the top down gradually, contains regenerator (31) in regenerator (3). The tapered top combustion hot blast stove with the heat storage chamber fully considers the heat transfer characteristic in the height direction of the heat storage chamber and the change of the gas medium flow velocity, ensures that the gas medium flow velocity in the grid holes of the lower low-temperature section is greater than the flow velocity required by convection heat transfer, meets the requirements of larger heat exchange area and heat storage volume required by radiation and convection heat transfer of the upper high-temperature section, is favorable for heat transfer between the heat storage body and the gas medium, improves the heat storage capacity of the upper high-temperature section, and achieves the effects of improving the wind temperature and reducing the energy consumption.
Description
Technical Field
The utility model relates to an industrial kiln field, specifically a regenerator takes tapered top combustion formula hot-blast furnace.
Background
Hot blast stoves are a typical regenerative heat exchanger. The heat accumulator is used as a carrier of high-temperature heat to absorb and store the heat of combustion products in the combustion period of the hot blast stove, and then the heat is discharged in the air supply period to heat air. That is to say, the heat accumulator of the regenerative hot blast stove is required to complete three processes of heat absorption, storage and transfer in one working cycle. Therefore, the heat transfer and storage capacity of the heat accumulator directly determines the blast temperature of the hot blast stove.
At present, the regenerative chambers of the hot blast stove all adopt the form of consistent upper and lower cross sectional areas, namely the heat exchange area and the heat storage volume of a heat storage body in the height direction of the regenerative chambers are kept consistent. The heat storage chambers of the hot blast stove have different temperatures and heat transfer characteristics at different heights, the high-temperature section at the upper part of the heat storage chamber transfers heat by radiation and convection, and the low-temperature section at the lower part mainly transfers heat by convection. Obviously, the traditional design form of the regenerator with the same upper and lower cross-sectional areas does not fully consider the heat transfer characteristics of the regenerator in the height direction and the change of the medium flow rate, and influences the heat transfer effect between the regenerator and the gas medium.
SUMMERY OF THE UTILITY MODEL
The heat transfer device aims to solve the problem that the heat transfer effect between the heat accumulator and the gas medium is not ideal. The utility model provides a tapered top combustion formula hot-blast furnace is taken to regenerator, the change of regenerator direction of height's heat transfer characteristic and the gaseous medium velocity of flow has been fully considered to this regenerator top combustion formula hot-blast furnace of taking tapering, the gaseous medium velocity of flow in both having guaranteed lower part low temperature section check hole is greater than the required velocity of flow of convection heat transfer, the requirement of upper portion high temperature section radiation and the required great heat transfer area of convection heat transfer and heat accumulation volume has been satisfied again, be favorable to the heat transfer between regenerator and gaseous medium, and the heat storage capacity of upper portion high-temperature area has been improved, reach and improve the wind temperature, reduce the effect of energy consumption.
The utility model provides a technique utility model that its technical problem adopted is: the top combustion hot blast stove with tapered heat accumulating chamber includes combustor, heat accumulating chamber and gas distributing chamber set successively from top to bottom, and the heat accumulating chamber has inside diameter gradually reduced from top to bottom and heat accumulator inside.
The regenerator is of a cylindrical structure.
The shape of the heat accumulator is matched with the inner cavity of the heat accumulator chamber.
The heat accumulator is formed by piling a plurality of checker bricks.
The dimensional parameters of each checker brick are the same.
The checker brick is provided with a horizontal gas channel which runs through the end faces of the two sides of the checker brick.
The checker bricks are 7-hole 6-sided checker bricks, 19-hole 6-sided checker bricks or 37-hole 6-sided checker bricks.
The heat accumulator can also be a fire-resistant heat accumulation ball.
The gas distribution chamber contains a grate and a pillar, and the heat accumulator is arranged on the grate.
The utility model has the advantages that:
1. the inverted frustum-shaped heat accumulator structure with the large upper part and the small lower part fully considers the heat transfer characteristic of the height direction of the heat accumulator and the change of the gas medium flow velocity, ensures that the gas medium flow velocity in the lower low-temperature section lattice hole is greater than the flow velocity required by convection heat transfer, meets the requirements of larger heat exchange area and heat accumulation volume required by radiation and convection heat transfer of the upper high-temperature section, is favorable for heat transfer between the heat accumulator and the gas medium, improves the heat storage capacity of the upper high-temperature section, and achieves the effects of improving the wind temperature and reducing the energy consumption.
2. Along with the increase of the height direction of the heat accumulator, the cross-sectional area of the heat accumulator is increased (the effective circulation area of the gas medium is also increased), the problem of over-high flow speed caused by the temperature rise of the gas medium is effectively solved, the resistance loss of the gas medium flowing through the upper high-temperature section is effectively reduced, and the energy conservation and consumption reduction of an iron-making system are facilitated.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a top combustion hot blast stove with a tapered regenerator of the present invention.
Fig. 2 is a schematic view of the structure of a complete monolithic checker brick.
Figure 3 is a schematic cross-sectional view of three checker bricks.
1. A burner; 2. a combustion chamber; 3. a regenerator; 4. a gas distribution chamber; 5. a hot blast stove large wall; 6. a furnace shell;
11. a gas inlet; 12. a combustion air inlet;
21. a hot air outlet;
31. a heat accumulator; 32. checker bricks; 33. a horizontal gas channel;
41. a flue gas outlet; 42. a cold air inlet; 43. a pillar; 44. a grate.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
A top combustion hot blast stove with a tapered regenerator comprises a burner 1, a combustion chamber 2, a regenerator 3 and a gas distribution chamber 4 which are sequentially arranged from top to bottom, wherein the inner diameter of the regenerator 3 is gradually reduced along the direction from top to bottom, and a regenerator 31 is arranged in the regenerator 3, as shown in figure 1.
The inner cavity of the top combustion hot blast stove with the tapered regenerator chamber is built by a stove shell 6 and a hot blast stove large wall 5 inside the stove shell. The inner cavity of the combustor 1 is respectively connected with a gas inlet 11 and a combustion air inlet 12, a hot air outlet 21 is arranged on the straight section side wall of the lower part of the combustion chamber 2, and at least one flue gas outlet 41 and a cold air inlet 42 are arranged on the side wall of the gas distribution chamber 4.
In the present embodiment, the regenerator 3 has an upright cylindrical structure, and the inner surface of the regenerator 3 has a truncated cone shape with a downward top end and an upward bottom end (i.e., an inverted truncated cone shape), and the taper angle of the inner surface of the regenerator 3 (the inverted truncated cone shape) is 2 α, α is 1 ° to 15 °, and the taper angle of the inner surface of the regenerator 3 is 2 ° to 30 °. The shape of the heat accumulator 31 is matched with the inner cavity of the heat accumulator 3, namely, the heat accumulator 31 is an inverted frustum, the taper angle of the heat accumulator 31 is the same as that of the inner surface of the heat accumulator 3, and the heat accumulator 31 is arranged in the inner cavity of the heat accumulator 3 in a matching way.
In the present embodiment, the heat accumulator 31 is formed by stacking a plurality of checker bricks 32. The dimensional parameters of each complete individual checker brick 32 are the same. I.e., each complete single checker brick 32 has the same cell diameter and the same cell spacing (i.e., the same live area and equivalent thickness of the checker brick); the checker bricks 32 contain not only longitudinal gas passing holes therein, but also horizontal gas passages 33 penetrating both horizontal side end faces of the checker bricks 32 in the checker bricks 32, as shown in fig. 3, the horizontal gas passages 33 communicating with the longitudinal gas passing holes.
In the present embodiment, the checker bricks 32 are fired from a refractory material, and the material of the checker bricks 32 differs at different height positions in the regenerator 3. Specifically, the checker bricks 32 located at the upper part of the heat accumulator 31 are made of refractory materials (such as siliceous checker bricks) with good high temperature resistance, the checker bricks 32 located at the middle part of the heat accumulator 31 are made of refractory materials (such as low-creep high-alumina checker bricks) with good creep resistance, and the checker bricks 32 located at the lower part of the heat accumulator 31 are made of refractory materials (such as high-alumina checker bricks or clay checker bricks) with high compressive strength. The siliceous checker bricks, the low creep high alumina checker bricks and the clay checker bricks can all adopt the existing commercial products.
In the present embodiment, as shown in fig. 2, checker bricks 32 may be 19-hole 6-sided checker bricks, 7-hole 6-sided checker bricks, or 37-hole 6-sided checker bricks, or the outer shape of checker bricks 32 may be selected from other shapes (e.g., rectangular, square, pentagonal, etc.). In the construction of the heat accumulator 31, the checker bricks 32 located at the circumferential edge of the heat accumulator 31 may be cut into an appropriate shape and then constructed so that the circumferential surface of the heat accumulator 31 matches the circumferential inner surface of the regenerator 3.
The heat accumulator 31 can be made of checker bricks 32, and the heat accumulator 31 can also be made of refractory heat accumulation balls or other refractory heat accumulation materials which can be commercially available products. Alternatively, the heat accumulator 31 may be formed by combining checker bricks 32 with the above-described refractory heat accumulation balls, for example, the checker bricks 32 may be laid in a cylindrical shape, and the refractory heat accumulation balls fill the gaps between the inner surfaces of the heat accumulation chambers 3 and the checker bricks 32 to form the heat accumulator 31 in an inverted truncated cone shape.
In this embodiment, the gas distribution chamber 4 contains a grate 44 and pillars 43, and the heat storage body 31 is seated on the grate 44. A grate 44 is located at the top inside the gas distribution chamber 4 and pillars 43 are used to support the grate 44 and the heat accumulator 31.
The working process of the top combustion hot blast stove with the tapered regenerative chamber is described as follows:
in the combustion stage, the gas and the combustion-supporting air introduced through the gas inlet 11 and the combustion-supporting air inlet 12 are mixed in the combustor 1 and are combusted in the combustion chamber 2 to generate high-temperature flue gas; the high-temperature flue gas is uniformly distributed on the upper surface of the heat storage chamber 3 and enters the grid holes of the heat storage body 31; after absorbing heat layer by the heat accumulator 31, the high temperature flue gas changes into low temperature flue gas on the upper surface of the grate and the support column 43, enters the gas distribution chamber 4, and is finally discharged from the flue gas outlet 41, as shown in fig. 1.
The cross section area of the upper high-temperature section of the heat accumulator 31 is large, and the heating area and the heat accumulation volume are also large, so that heat transfer and storage of the high-temperature section are facilitated, and more heat can be stored in the upper high-temperature section of the heat accumulator 31 in the combustion stage; as the height of the heat accumulator 31 is reduced, the cross-sectional area of the heat accumulator is reduced, and the effective flow area of the flue gas flowing through the heat accumulator 31 is reduced, so that the flow speed of the flue gas is prevented from being reduced too much due to temperature reduction, and the heat convection effect of the lower low-temperature section of the heat accumulator 31 is ensured.
The uniform distribution of flue gas over the different cross-sections of the heat accumulator 31 in the height direction is regulated by the horizontal gas channels 33 on the end faces of the checker bricks 32.
In the air supply stage, low-temperature cold air enters the gas distribution chamber 4 through the cold air inlet 42 and then enters the grid holes of the heat accumulator 31; after the heat accumulator 31 is heated layer by layer, the low-temperature cold air is changed into high-temperature hot air on the upper surface of the heat accumulator 31, enters the combustion chamber 2, and is then sent to the blast furnace through the hot air outlet 21.
The upper high-temperature section of the heat accumulator 31 stores more high-temperature heat in the combustion stage, so that cold air can obtain higher hot air temperature after passing through the heat accumulator 31; along with the increase of the height of the heat accumulator 31, the cross section area of the heat accumulator 31 is increased, the effective flow area of the cold air flowing through the heat accumulator 31 is increased, the phenomenon that the flow speed of the cold air is too high due to the increase of the temperature is avoided, and the resistance loss of the cold air flowing through the high-temperature section at the upper part of the heat accumulator 31 is effectively reduced.
The uniform distribution of the cooling air over the different cross-sections of the heat accumulator 31 in the height direction is also regulated by the horizontal gas channels 33 on the end faces of the checker bricks 32.
The above description is only for the specific embodiments of the present invention, and the scope of the present invention can not be limited by the embodiments, so that the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent. Additionally, the utility model provides an between technical feature and the technical feature, between technical feature and the technical utility model, between technical utility model and the technical utility model all can the independent assortment use.
Claims (9)
1. The utility model provides a tapered top combustion hot-blast furnace is taken to regenerator, its characterized in that, tapered top combustion hot-blast furnace is taken to regenerator includes combustor (1), combustion chamber (2), regenerator (3) and the gas distribution room (4) that set gradually from the top down, and the internal diameter of regenerator (3) reduces gradually along the direction from the top down, contains regenerator (31) in regenerator (3).
2. The top combustion stove with tapered regenerator according to claim 1, characterized in that the regenerator (3) is of cylindrical structure.
3. The top combustion stove with tapered regenerator according to claim 1, characterized in that the shape of the regenerator (31) matches the inner cavity of the regenerator (3).
4. The regenerator tapered top-fired hot blast stove according to claim 1, characterized in that the heat accumulator (31) is built up from a plurality of checker bricks (32).
5. The regenerator tapered top firing stove according to claim 4, characterized in that the dimensional parameters of each checker brick (32) are the same.
6. The top combustion stove with tapered regenerator according to claim 4, characterized in that the checker bricks (32) contain horizontal gas passages (33) through both side faces of the checker bricks (32).
7. The regenerator tapered top firing stove according to claim 4 where the checker bricks (32) are 7 hole 6 cornered checker bricks, 19 hole 6 cornered checker bricks or 37 hole 6 cornered checker bricks.
8. The top combustion stove with tapered regenerator according to claim 1, characterized in that the heat accumulator (31) is a refractory heat accumulating ball.
9. A regenerator tapered top-fired hot blast stove according to claim 1 in which the gas distribution chamber (4) contains a grate (44) and pillars (43) and the regenerator (31) is mounted on the grate (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922143327.5U CN211367621U (en) | 2019-12-03 | 2019-12-03 | Top combustion hot blast stove with tapered regenerative chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922143327.5U CN211367621U (en) | 2019-12-03 | 2019-12-03 | Top combustion hot blast stove with tapered regenerative chamber |
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| Publication Number | Publication Date |
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| CN211367621U true CN211367621U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922143327.5U Active CN211367621U (en) | 2019-12-03 | 2019-12-03 | Top combustion hot blast stove with tapered regenerative chamber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846455A (en) * | 2019-12-03 | 2020-02-28 | 中冶京诚工程技术有限公司 | Top combustion hot blast stove with tapered regenerative chamber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846455A (en) * | 2019-12-03 | 2020-02-28 | 中冶京诚工程技术有限公司 | Top combustion hot blast stove with tapered regenerative chamber |
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