CN107228588B - High-efficiency heating furnace regenerator honeycomb body - Google Patents
High-efficiency heating furnace regenerator honeycomb body Download PDFInfo
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- CN107228588B CN107228588B CN201710655862.1A CN201710655862A CN107228588B CN 107228588 B CN107228588 B CN 107228588B CN 201710655862 A CN201710655862 A CN 201710655862A CN 107228588 B CN107228588 B CN 107228588B
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- honeycomb body
- honeycomb
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- holes
- energy storage
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
- F28D2020/0078—Heat exchanger arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0024—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for combustion apparatus, e.g. for boilers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a high-efficiency heating furnace regenerator honeycomb body, which comprises a light honeycomb body, wherein the inside of the light honeycomb body is correspondingly connected with a heavy honeycomb body, the inside of the heavy honeycomb body is correspondingly provided with a high energy storage honeycomb body, the pore diameters of light honeycomb holes, heavy honeycomb holes and Gao Xuneng honeycomb holes are sequentially increased, the light honeycomb body is correspondingly and detachably connected with the heavy honeycomb body through an outer ring connecting block, the outer ring connecting block is arranged at four corners of the heavy honeycomb body, the heavy honeycomb body is correspondingly and detachably connected with the high energy storage honeycomb body through an inner ring connecting block, and the inner ring connecting block is arranged at four sides of the high energy storage honeycomb body. The invention reduces the heat taken away by the waste gas by combining the inside and outside of the light honeycomb body, the heavy honeycomb body and the high energy storage honeycomb body, and the heat efficiency of the heating furnace is obviously improved.
Description
Technical Field
The invention relates to a heating furnace regenerator honeycomb body, in particular to a high-efficiency heating furnace regenerator honeycomb body.
Background
The double-regenerator heating furnace is applied to various steel rolling mills on a large scale, and has the biggest characteristics of high energy saving efficiency, simple and convenient operation and capability of greatly reducing the rolling energy consumption and the rolling cost of steel.
The calorific value of the blast furnace gas of a steel mill in Jiangxi is about 3135KJ/Nm3, the calorific value is lower, the theoretical combustion temperature is about 1300 ℃, and the actual combustion temperature is about 900 ℃, so that the requirement of the theoretical combustion temperature above 1700 ℃ and the actual combustion temperature above 1250 ℃ required by the heating furnace for normally heating billets can not be met by simply combusting the blast furnace gas, and the problem is exactly solved by the double-heat-accumulation heating furnace.
The technical principle of the double heat accumulation heating furnace is that after the heat accumulator is preheated by hot waste gas discharged out of the furnace, the heat absorbed by the high temperature heat accumulator is commutated by a commutator to preheat cold coal gas and cold combustion air, so that the temperature of the preheated coal gas and the preheated combustion air reaches more than 1000 ℃, and the discharge temperature of the waste gas is lower than 170 ℃. The physical heat brought by the hot gas and the hot air can raise the theoretical combustion temperature of the gas to above 1800 ℃ and the actual combustion temperature to above 1300 ℃, thereby meeting the production requirement, realizing the large-scale energy saving of the heating furnace and simultaneously fully utilizing the low-heat value blast furnace gas.
Because the traditional honeycomb body has a single structure and small volume density, and the heat exchange area is pursued on one surface, the heat storage capacity, the compressive strength, the refractoriness, the soft-on-load temperature and the thermal shock resistance of the honeycomb body are insufficient, the honeycomb body is extruded and deformed in the use process, most of the top layers of the heat storage chambers form cavities, the smoke discharging temperature reaches 300-500 ℃, the smoke discharging system equipment is seriously damaged, the air permeability of the middle-layer and lower-layer honeycomb bodies is poor due to the extrusion deformation, the air and gas are blocked when passing through the honeycomb bodies, the fluid distribution is uneven, the air and gas preheating temperature is difficult to reach a more ideal state, so that the theoretical combustion temperature of the blast furnace gas with low heat value is influenced in the combustion process, and operators can only enlarge the gas and the air flow rate to ensure the normal production rhythm, thus the gas consumption is higher. Therefore, improving the heat accumulator and searching for a more scientific combination mode are urgent to solve.
Disclosure of Invention
Aiming at the defects in the prior art, a high-efficiency heating furnace regenerator honeycomb body is provided.
The invention is realized by the following scheme:
the utility model provides a high efficiency heating furnace regenerator honeycomb body, includes the light honeycomb body, it is in the inside of light honeycomb body corresponds and is connected with the heavy honeycomb body the inside of heavy honeycomb body corresponds and is connected with the high energy storage honeycomb body the light honeycomb body is last to have seted up the light honeycomb hole of a plurality of layers be equipped with the heavy honeycomb hole of a plurality of layers on the heavy honeycomb body Gao Xuneng honeycomb is internal to be equipped with the high energy storage honeycomb hole of a plurality of layers, the aperture of light honeycomb hole, heavy honeycomb hole, gao Xuneng honeycomb hole increases in proper order, the light honeycomb body corresponds releasable connection with the heavy honeycomb body through outer lane connecting block, the outer lane connecting block sets up the four corners at the heavy honeycomb body, the heavy honeycomb body corresponds releasable connection through the inner circle connecting block with the high energy storage honeycomb body, the inner circle connecting block sets up the four sides at the high energy storage honeycomb body.
And a metal reinforcing ring is correspondingly arranged on the outer side of the light honeycomb body.
The aperture of the light honeycomb holes 4 is 3 mm, the aperture of the heavy honeycomb holes 5 is 6 mm, and the aperture of the Gao Xuneng honeycomb holes 6 is 8 mm.
The Gao Xuneng honeycomb body is internally provided with two layers of high-energy-storage honeycomb holes, the heavy honeycomb body is internally provided with four layers of heavy honeycomb holes, and the light honeycomb body is internally provided with one layer of light honeycomb holes.
The high energy storage honeycomb body is provided with a blind hole in a shape of a handle.
The beneficial effects of the invention are as follows:
1. according to the high-efficiency heating furnace regenerator honeycomb body, the heat taken away by waste gas is reduced through the internal and external combination of the light honeycomb body, the heavy honeycomb body and the high-energy-storage honeycomb body, and the heat efficiency of the heating furnace is remarkably improved.
2. According to the high-efficiency heating furnace regenerator honeycomb body, the light honeycomb body, the heavy honeycomb body and the high-energy-storage honeycomb body are detachably connected through the outer ring connecting block and the inner ring connecting block respectively, so that the high-efficiency heating furnace regenerator honeycomb body is convenient to overhaul and maintain, only the damaged part is required to be replaced when the damage is caused and the maintenance is impossible, the whole replacement is not required, and the production cost is saved.
3. According to the high-efficiency heating furnace regenerator honeycomb body, the high-energy-storage honeycomb body is provided with the grip-shaped blind holes, and the most fragile high-energy-storage honeycomb body can be conveniently taken out, maintained and replaced through the blind holes.
Drawings
FIG. 1 is a schematic view of a high efficiency regenerator honeycomb structure for a heating furnace in accordance with the present invention;
fig. 2 is a detailed view of the structure of the portion a in fig. 1.
In the figure: 1 is a light honeycomb body, 2 is a heavy honeycomb body, 3 is a high energy storage honeycomb body, 4 is a light honeycomb hole, 5 is a heavy honeycomb hole, 6 is a high energy storage honeycomb hole, 7 is an outer ring connecting block, 8 is an inner ring connecting block, 9 is a metal reinforcing ring, and 10 is a blind hole.
Detailed Description
Preferred embodiments of the present invention are further described below in conjunction with fig. 1-2:
the utility model provides a high efficiency heating furnace regenerator honeycomb body, includes light honeycomb body 1, it is in the inside of light honeycomb body 1 corresponds and is connected with heavy honeycomb body 2 the inside of heavy honeycomb body 2 corresponds and is connected with high energy storage honeycomb body 3 light honeycomb hole 4 of a plurality of layers has been seted up on the light honeycomb body 1 be equipped with a plurality of layers heavy honeycomb hole 5 on the heavy honeycomb body 2 be equipped with a plurality of layers high energy storage honeycomb hole 6 in Gao Xuneng honeycomb body 3, the aperture of light honeycomb hole 4, heavy honeycomb hole 5, high energy storage honeycomb hole 6 increases in proper order, light honeycomb body 1 corresponds releasable connection through outer lane connecting block 7 and heavy honeycomb body 2 the outer lane connecting block 7 sets up in the four corners of heavy honeycomb body 2, heavy honeycomb body 2 corresponds releasable connection through inner circle connecting block 8 with high energy storage honeycomb body 3, inner circle connecting block 8 sets up in high energy storage honeycomb body 3. The light honeycomb body, the heavy honeycomb body and the high energy storage honeycomb body are detachably connected through the outer ring connecting block and the inner ring connecting block respectively, so that the maintenance is convenient, the damaged part is only required to be replaced when the damage cannot be maintained, the whole replacement is not required, and the production cost is saved. A blind hole 10 in the form of a finger grip is provided in the Gao Xuneng honeycomb body 3. The high energy storage honeycomb body which is most vulnerable to damage can be conveniently taken out, maintained and replaced through the blind hole.
In this embodiment, two layers of high energy storage honeycomb holes 6 are formed in the Gao Xuneng honeycomb body 3, four layers of heavy honeycomb holes 5 are formed in the heavy honeycomb body 2, and one layer of light honeycomb holes 4 are formed in the light honeycomb body 1. The number of layers of various honeycomb holes in the light honeycomb body, the heavy honeycomb body and the high energy storage honeycomb body can be adjusted according to actual working conditions.
In general, the greater the volume density of the honeycomb body is, the greater the heat storage capacity is, and therefore, the invention reforms the honeycomb body to improve the heat storage capacity. On the basis of the original honeycomb body, the heat taken away by waste gas is reduced by combining the inside and outside of the light honeycomb body, the heavy honeycomb body and the high energy storage honeycomb body, and the heat efficiency of the heating furnace is obviously improved.
The main technical parameters of the three honeycomb bodies are listed in table 1, and the invention adopts a high energy storage honeycomb body and a heavy honeycomb body which have large volume density and small heat exchange specific surface area, and is matched with a light honeycomb body which has small volume density and large heat exchange specific surface area and is combined in a mode of from inside to outside and from high temperature to low temperature. The specific combination mode is determined according to the heat load of the heating furnace and the exhaust gas discharge temperature. The high-rod heating furnace of a certain steel mill has large heat load, the smoke exhaust temperature is up to 600 ℃, in practical application, 4 layers of high-energy-storage honeycomb holes are adopted in the inner layer, 4 layers of heavy honeycomb holes are adopted in the middle layer, and 1 layer of light honeycomb holes are adopted in the outer layer. For the heating furnace with the heat load and the exhaust gas discharge temperature lower than those of the high-rod heating furnace, 2 layers of high-energy-storage honeycomb holes can be adopted in the inner layer, 4-5 layers of heavy honeycomb holes are adopted in the middle layer, and 2-3 layers of light honeycomb holes are adopted in the outer layer.
Table 1 technical parameters of the honeycomb body
| Species of type | Al 2 O 3 (%) | ZrO 2 （%） | Density (Kg/m) 3 ） | Wall thickness (mm) |
| High energy storage honeycomb body | ≥78 | ≥0.5 | ≥1550 | 4 |
| Heavy honeycomb body | ≥70 | 0 | ≥1100 | 3 |
| Lightweight honeycomb body | ≥70 | 0 | ≥820 | 1 |
A metal reinforcing ring 9 is correspondingly arranged on the outer side of the lightweight honeycomb body 1. The metal reinforcing ring can effectively prevent the invention from cracking in the use process, and prolong the service life. The aperture of the light honeycomb holes 4 is 3 mm, the aperture of the heavy honeycomb holes 5 is 6 mm, and the aperture of the Gao Xuneng honeycomb holes 6 is 8 mm.
The domestic heating furnace generally adopts a honeycomb body to fill the regenerator, the heat exchange area of the honeycomb body is excessively pursued, and the index of the heat storage capacity of the honeycomb body is ignored, so that the temperature of the regenerator smoke of part of the heating furnace is difficult to control, and the smoke temperature of the regenerator smoke is higher, so that the smoke brings a large amount of heat, and the heat efficiency of the heating furnace is reduced. The traditional lightweight honeycomb body is adopted, and the highest compressive strength, refractoriness, soft-load temperature and thermal shock resistance are insufficient, so that creep subsidence occurs from inside to outside in the use process, the top layer of the heat storage chamber gradually forms cavities, the air flow distribution is uniform, the heat exchange effect of the honeycomb body is reduced, and the capability of preheating air and coal gas is further reduced. The invention greatly reduces the exhaust temperature of the exhaust gas from 300-500 ℃ to 100-170 ℃, reduces the heat taken away by the exhaust gas, and generally improves the heat efficiency of the heating furnace.
Five heating furnaces of four production lines of a steel mill in the Jiangxi of 2016 year and 4-12 months ton comprehensive blast furnace gas consumption is 261.95m before transformation 3 Reduced/t to 237.01m 3 The amplitude reduction is 9.52 percent, the direct economic benefit 950 ten thousand yuan is created, the process is thatAccounting is carried out, and the productivity of the heating furnace is improved by 5.2% by adopting the technical scheme of the invention in 2016. The high energy storage honeycomb body of the invention contains ZrO 2 In addition, the high energy storage honeycomb body and the heavy honeycomb body are multiplied because the pore diameter of the high energy storage honeycomb body and the pore diameter of the heavy honeycomb body are light, so that the high energy storage honeycomb body and the heavy honeycomb body are not easy to be blocked even when the blast furnace gas contains water and has larger dust content, and the service life of the regenerator honeycomb body is prolonged. In addition, the invention has simple structure, convenient transformation and low cost, and is beneficial for life after one transformation.
While the invention has been described and illustrated in considerable detail, it should be understood that modifications and equivalents to the above-described embodiments will become apparent to those skilled in the art, and that such modifications and improvements may be made without departing from the spirit of the invention.
Claims (1)
1. A high efficiency heating furnace regenerator honeycomb body comprising a lightweight honeycomb body (1), characterized in that: the lightweight honeycomb body (1) is internally and correspondingly connected with a heavy honeycomb body (2), the heavy honeycomb body (2) is internally and correspondingly connected with a high energy storage honeycomb body (3), the lightweight honeycomb body (1) is provided with a plurality of layers of lightweight honeycomb holes (4), the heavy honeycomb body (2) is provided with a plurality of layers of heavy honeycomb holes (5), the Gao Xuneng honeycomb body (3) is internally provided with a plurality of layers of high energy storage honeycomb holes (6), the apertures of the lightweight honeycomb holes (4), the heavy honeycomb holes (5) and the high energy storage honeycomb holes (6) are sequentially increased, the lightweight honeycomb body (1) is correspondingly and detachably connected with the heavy honeycomb body (2) through an outer ring connecting block (7), the outer ring connecting block (7) is arranged at four corners of the heavy honeycomb body (2), the heavy honeycomb body (2) is correspondingly and the high energy storage honeycomb body (3) are correspondingly and detachably connected through an inner ring (8), and the light honeycomb body (4), the heavy honeycomb body (8) and the high energy storage honeycomb body (3) are detachably connected with four corners through the inner ring connecting block (8). The outer side of the lightweight honeycomb body (1) is correspondingly provided with a metal reinforcing ring (9); the aperture of the light honeycomb holes (4) is 3 mm, the aperture of the heavy honeycomb holes (5) is 6 mm, and the aperture of the Gao Xuneng honeycomb holes (6) is 8 mm; two layers of high energy storage honeycomb holes (6) are formed in the Gao Xuneng honeycomb body (3), four layers of heavy honeycomb holes (5) are formed in the heavy honeycomb body (2), and one layer of light honeycomb holes (4) are formed in the light honeycomb body (1); a blind hole (10) in the shape of a grip is arranged on the Gao Xuneng honeycomb body (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710655862.1A CN107228588B (en) | 2017-08-03 | 2017-08-03 | High-efficiency heating furnace regenerator honeycomb body |
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| CN201710655862.1A CN107228588B (en) | 2017-08-03 | 2017-08-03 | High-efficiency heating furnace regenerator honeycomb body |
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| CN107228588B true CN107228588B (en) | 2023-08-18 |
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2017
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| JP2005154202A (en) * | 2003-11-26 | 2005-06-16 | Ngk Insulators Ltd | Honeycomb structure, its production method, and joining material |
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