CN110645798A - Asymmetric reversing single-heat-storage heating furnace and operation method thereof - Google Patents
Asymmetric reversing single-heat-storage heating furnace and operation method thereof Download PDFInfo
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- CN110645798A CN110645798A CN201910999302.7A CN201910999302A CN110645798A CN 110645798 A CN110645798 A CN 110645798A CN 201910999302 A CN201910999302 A CN 201910999302A CN 110645798 A CN110645798 A CN 110645798A
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- reversing
- heat accumulation
- burners
- smoke exhaust
- burner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
Abstract
An asymmetric reversing single heat storage heating furnace comprises a furnace body, a single heat storage burner and a reversing control device, wherein the reversing control device comprises a reversing valve and a quick-cutting valve; the two opposite sides of the furnace body are symmetrically provided with the single heat accumulation burners with the same number; the single heat accumulation burner is connected with the quick-cutting valve and the reversing valve, the other end of the quick-cutting valve is connected with the gas pipeline, and the other end of the reversing valve is respectively connected with the combustion-supporting air pipeline and the smoke exhaust pipeline. During the operation mode, n of the single regenerative burners on each side in the furnace body are in a combustion state in turn, the rest of the single regenerative burners are in a smoke exhaust state, n is smaller than half of the total number of the single regenerative burners on each side, and the single regenerative burners in the combustion state on two sides are not symmetrical. The single heat storage burner at each side of the single heat storage heating furnace is in a combustion state and a smoke exhaust state through reversing, the smoke exhaust capacity of the heat storage burner is improved, all high-temperature smoke carries out waste heat recovery through the heat storage burner, and the pressure of a hearth can be flexibly adjusted.
Description
Technical Field
The invention relates to an industrial heating furnace, in particular to a continuous heating furnace for steel rolling, belonging to the technical field of steel rolling heating furnaces.
Background
The heat accumulating continuous heating furnace for rolling steel consists of furnace body and heat accumulating burner. The regenerative burners are symmetrically and uniformly distributed on two sides of the furnace body of the heating furnace, and the combustion and smoke exhaust states of the regenerative burners on the two sides are controlled by periodically reversing.
At present, the combustion and smoke discharge of a regenerative combustion heating furnace are in a symmetrical state, namely, a plurality of regenerative burners are arranged on one side of the heating furnace and are in a combustion state, and a plurality of regenerative burners are arranged on the other side of the heating furnace and are in a smoke discharge state. For a single heat storage heating furnace, because the amount of flue gas generated after combustion is far larger than the amount of combustion air, part of the flue gas cannot be discharged through a heat storage burner, so that the pressure of a hearth is increased, the flue gas overflows and wastes fuel, and equipment is burnt out.
In order to reduce the pressure of a hearth, the prior art adopts a method of arranging an auxiliary smoke exhaust flue so as to discharge redundant smoke from the auxiliary flue; because the high-temperature flue gas discharged by the auxiliary flue is not subjected to heat recovery, energy waste is caused, the heating cost is increased, and the environment is polluted.
Disclosure of Invention
Aiming at the problems existing in the conventional single heat storage heating furnace with an auxiliary flue, the invention provides the asymmetric reversing single heat storage heating furnace, so that the high-temperature flue gas is completely subjected to heat recovery through a heat storage burner, and the aims of reducing the emission of the high-temperature flue gas, reducing the heating energy consumption and saving energy are fulfilled.
The invention relates to an asymmetric reversing single heat storage heating furnace, which adopts the following technical scheme:
the asymmetric reversing single-heat-storage heating furnace comprises a furnace body, a single-heat-storage burner and a reversing control device, wherein the reversing control device comprises a reversing valve and a quick-cutting valve; the two opposite sides of the furnace body are symmetrically provided with the single heat accumulation burners with the same number; the single heat accumulation burner is connected with the quick-cutting valve and the reversing valve, the other end of the quick-cutting valve is connected with the gas pipeline, and the other end of the reversing valve is respectively connected with the combustion-supporting air pipeline and the smoke exhaust pipeline.
The reversing valve is a two-position three-way reversing valve or a two-position four-way reversing valve.
The operation method of the asymmetric reversing single-heat-storage heating furnace comprises the following steps:
n of the single heat accumulation burners on each side in the furnace body are in a combustion state in turn, the rest are in a smoke exhaust state, n is less than half of the total number of the single heat accumulation burners on each side, and the single heat accumulation burners in the combustion state on two sides are not symmetrical (staggered).
The number n of the single heat accumulation burners on each side in the furnace body in a combustion state is one third of the total number of the single heat accumulation burners on each side.
And 3 single regenerative burners on each side of the furnace body are sequentially arranged in a group, one of each group is in a combustion state, and the other two are in a smoke exhaust state.
The single heat storage burner at each side of the single heat storage heating furnace has a combustion state and a smoke exhaust state through reversing, the smoke exhaust capacity of the heat storage burner is improved, all high-temperature smoke passes through the heat storage burner to recover waste heat, and the pressure of a hearth can be flexibly adjusted. Has the following characteristics:
1. the quantity of the heat accumulation burners at the two sides of the furnace body is the same, only one third of the heat accumulation burners at each side are in a combustion state, two thirds of the heat accumulation burners at each side are in a smoke exhaust state, and the smoke exhaust capacity is high;
2. because the number of the heat storage burners in the smoke discharging state is twice that of the heat storage burners in the combustion state, the hearth pressure is flexibly adjusted, and the hearth pressure of the heating furnace is conveniently adjusted to be within the use range;
3. each regenerative burner is in a combustion state in one reversing period, and is in a smoke exhaust state in two reversing periods, so that the smoke exhaust temperature is low, and the energy-saving and environment-friendly effects are remarkable.
Drawings
FIG. 1 is a schematic structural diagram of an asymmetric reversing single regenerative furnace according to the present invention.
In the figure: 1. the burner comprises a furnace body, 2 parts of single regenerative burners, 3 parts of gas quick-cutting valves, 4 parts of reversing valves, 5 parts of gas connecting pipes, 6 parts of smoke exhaust pipelines, 7 parts of combustion-supporting air pipelines, 8 parts of fuel main pipes, 9 parts of smoke exhaust main pipes and 10 parts of combustion-supporting air main pipes.
Detailed Description
The invention discloses an asymmetric reversing single-heat-storage heating furnace which is shown in figure 1 and comprises a furnace body 1, a single-heat-storage burner 2, a reversing control device, a gas connecting pipe 5, a smoke exhaust pipeline 6 and a combustion-supporting air pipeline 7. The reversing control device comprises a fuel gas quick-switching valve 3 and a reversing valve 4, and the reversing valve 4 is a two-position three-way reversing valve or a two-position four-way reversing valve.
The two sides of the furnace body 1, namely the side A and the side B, are symmetrically provided with single regenerative burners 2 with the same number. The gas connecting pipe of the single heat storage burner 2 is connected with a gas pipeline 5 through a gas quick-cutting valve 3, and the gas pipeline 5 is connected with a fuel main pipe 8. The air inlet and exhaust connecting pipes of the single heat accumulation burner 2 are respectively connected with a combustion air pipeline 7 and a smoke exhaust pipeline 6 through a reversing valve 4, the combustion air pipeline 7 and the smoke exhaust pipeline 6 are respectively connected with a combustion air main pipe 10 and a smoke exhaust main pipe 9, the conversion of the combustion function and the smoke exhaust function of the single heat accumulation burner 2 is realized through the switching function of the reversing valve 4, and the single heat accumulation burner 2 can enter air or discharge smoke through the switching of the reversing valve 4. When the gas quick-switching valve 3 of the single heat-accumulating burner 2 is opened and the reversing valve 4 is communicated with combustion air, the single heat-accumulating burner 2 is in a combustion state. When the gas quick-switching valve 3 of the single heat-accumulating burner 2 is closed and the reversing valve 4 is in the flue gas connection state, the single heat-accumulating burner 2 is in the flue gas exhaust state.
The single regenerative heating furnace is operated in the following manner according to the prior art:
when the single heat accumulation burner 2 on the side A is in a combustion state, the single heat accumulation burner 2 on the side B, which is symmetrical to the side B, is in a smoke exhaust state; when the single regenerative burner 2 on the side A discharges smoke in the next reversing period, the single regenerative burner 2 on the side B which is symmetrical to the single regenerative burner 2 on the side A is in a combustion state, namely the side A and the side B are in a symmetrical reversing single regenerative combustion mode.
Because the flue gas volume that produces during single regenerative combustion is 1.1 ~ 1.8 times of combustion-supporting air demand volume, if the flue gas all can cause the increase of heating furnace internal pressure and exhaust gas temperature when passing through single regenerative burner. In order to solve the two problems, an auxiliary flue is arranged in a single regenerative heating furnace at present. After the auxiliary flue is arranged, the heat of the flue gas exhausted by the auxiliary flue is not recovered through the heat storage burner, and the exhaust temperature is almost close to the temperature of the hearth, so that the fuel waste and the environment pollution are caused.
In order to solve the above problems, the present invention adopts an operation mode of asymmetric commutation on the side a and the side B, which is specifically as follows:
and 3 single regenerative burners on the A side and the B side of the furnace body are sequentially divided into a group. When the heating furnace A side is in combustion with the single heat accumulation burner 2, the single heat accumulation burner 2 is in a smoke exhaust state, the B side is in a smoke exhaust state with the single heat accumulation burner 2, and the single heat accumulation burner 2 is in a combustion state. When the heating furnace A side and the single heat storage burner 2 are in combustion in the next reversing period, the first heat storage burner 2 and the third heat storage burner 2 are in a smoke exhaust state, the second heat storage burner 2 and the third heat storage burner 2 are in a smoke exhaust state, and the third heat storage burner 2 is in a combustion state. And in the next reversing period, when the No. A single heat storage burner 2 of the heating furnace is combusted, the No. A and the No. II single heat storage burners 2 are in a smoke exhaust state, the No. B and the No. III single heat storage burners 2 are in a smoke exhaust state, and the No. 2 single heat storage burners are in a combustion state.
The operation mode is obtained through long-term experiments, each side of the furnace body is provided with a burning heat accumulation burner and a smoke exhaust heat accumulation burner, and the number of the single heat accumulation burners 2 in the smoke exhaust state is twice that of the single heat accumulation burners 2 in the combustion state, so that the hearth pressure is flexibly adjusted, the hearth pressure of the heating furnace is conveniently adjusted to the application range, the smoke exhaust temperature of the smoke can be effectively reduced, and the effects of energy conservation and environmental protection are achieved.
The invention increases the smoke exhaust capacity of the heat accumulation burner, all high-temperature smoke passes through the single heat accumulation burner to recover waste heat, and the pressure of the hearth can be flexibly adjusted.
Claims (5)
1. The utility model provides an asymmetric switching-over list heat accumulation heating furnace, includes furnace body, list heat accumulation nozzle and switching-over controlling means, characterized by: the reversing control device comprises a reversing valve and a quick-cutting valve; the two opposite sides of the furnace body are symmetrically provided with the single heat accumulation burners with the same number; the single heat accumulation burner is connected with the quick-cutting valve and the reversing valve, the other end of the quick-cutting valve is connected with the gas pipeline, and the other end of the reversing valve is respectively connected with the combustion-supporting air pipeline and the smoke exhaust pipeline.
2. The asymmetrically commutated single regenerative furnace according to claim 1, wherein: the reversing valve is a two-position three-way reversing valve or a two-position four-way reversing valve.
3. An operation method of the asymmetric reversing single regenerative furnace according to claim 1, characterized in that: n of the single heat accumulation burners on each side in the furnace body are in a combustion state in turn, the rest are in a smoke exhaust state, n is less than half of the total number of the single heat accumulation burners on each side, and the single heat accumulation burners in the combustion state on two sides are not symmetrical.
4. The operation method of the asymmetric reversal single regenerative furnace according to claim 3, characterized in that: the number n of the single heat accumulation burners on each side in the furnace body in a combustion state is one third of the total number of the single heat accumulation burners on each side.
5. The operation method of the asymmetric reversal single regenerative furnace according to claim 3, characterized in that: and 3 single regenerative burners on each side of the furnace body are sequentially arranged in a group, one of each group is in a combustion state, and the other two are in a smoke exhaust state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910999302.7A CN110645798A (en) | 2019-10-21 | 2019-10-21 | Asymmetric reversing single-heat-storage heating furnace and operation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910999302.7A CN110645798A (en) | 2019-10-21 | 2019-10-21 | Asymmetric reversing single-heat-storage heating furnace and operation method thereof |
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| CN110645798A true CN110645798A (en) | 2020-01-03 |
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| CN201910999302.7A Pending CN110645798A (en) | 2019-10-21 | 2019-10-21 | Asymmetric reversing single-heat-storage heating furnace and operation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780567A (en) * | 2020-06-19 | 2020-10-16 | 无锡寸长南方工程技术有限公司 | Asymmetric combustion and smoke exhaust method of regenerative heating furnace |
| CN112097534A (en) * | 2020-09-15 | 2020-12-18 | 法孚斯坦因冶金技术（上海）有限公司 | Digital single heat accumulating type heating furnace |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10238756A (en) * | 1997-02-26 | 1998-09-08 | Nkk Corp | Operation of regenerative burner furnace and the regenerative burner furnace |
| JPH11316018A (en) * | 1998-05-01 | 1999-11-16 | Nippon Steel Corp | Combustion control of thermal storage system combustion equipment |
| CN2539120Y (en) * | 2002-05-22 | 2003-03-05 | 邯郸钢铁股份有限公司 | Decentralized reverse control heating furnace |
| CN2663818Y (en) * | 2003-06-06 | 2004-12-15 | 上海嘉德环境能源科技有限公司 | Heat accumulation type fully-dispersed changing-over combustion equipment for industrial furnace |
| CN103014312A (en) * | 2012-12-26 | 2013-04-03 | 中冶南方(武汉)威仕工业炉有限公司 | Control method of regenerative burner of regenerative heating furnace |
| CN108278906A (en) * | 2018-01-17 | 2018-07-13 | 上海曙佳科技发展有限公司 | Suitable for the optimal control method under the conditions of recuperative heater low load combustion |
| CN109442409A (en) * | 2013-09-24 | 2019-03-08 | 湖南巴陵炉窑节能股份有限公司 | A kind of heat accumulating burner and its control method |
-
2019
- 2019-10-21 CN CN201910999302.7A patent/CN110645798A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10238756A (en) * | 1997-02-26 | 1998-09-08 | Nkk Corp | Operation of regenerative burner furnace and the regenerative burner furnace |
| JPH11316018A (en) * | 1998-05-01 | 1999-11-16 | Nippon Steel Corp | Combustion control of thermal storage system combustion equipment |
| CN2539120Y (en) * | 2002-05-22 | 2003-03-05 | 邯郸钢铁股份有限公司 | Decentralized reverse control heating furnace |
| CN2663818Y (en) * | 2003-06-06 | 2004-12-15 | 上海嘉德环境能源科技有限公司 | Heat accumulation type fully-dispersed changing-over combustion equipment for industrial furnace |
| CN103014312A (en) * | 2012-12-26 | 2013-04-03 | 中冶南方(武汉)威仕工业炉有限公司 | Control method of regenerative burner of regenerative heating furnace |
| CN109442409A (en) * | 2013-09-24 | 2019-03-08 | 湖南巴陵炉窑节能股份有限公司 | A kind of heat accumulating burner and its control method |
| CN108278906A (en) * | 2018-01-17 | 2018-07-13 | 上海曙佳科技发展有限公司 | Suitable for the optimal control method under the conditions of recuperative heater low load combustion |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780567A (en) * | 2020-06-19 | 2020-10-16 | 无锡寸长南方工程技术有限公司 | Asymmetric combustion and smoke exhaust method of regenerative heating furnace |
| CN112097534A (en) * | 2020-09-15 | 2020-12-18 | 法孚斯坦因冶金技术（上海）有限公司 | Digital single heat accumulating type heating furnace |
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