CN210050992U - Coal-fired boiler type hot-blast stove - Google Patents
Coal-fired boiler type hot-blast stove Download PDFInfo
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- CN210050992U CN210050992U CN201920581946.XU CN201920581946U CN210050992U CN 210050992 U CN210050992 U CN 210050992U CN 201920581946 U CN201920581946 U CN 201920581946U CN 210050992 U CN210050992 U CN 210050992U
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- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses a coal fired boiler type hot blast stove, which comprises a hearth, a tail flue, a combustion system and a steam-water system, wherein a tail flue inlet collection box, a tail flue lower collection box, a wall type superheater inlet collection box, a wall type superheater, a full large screen superheater and a rear screen superheater which are sequentially connected are additionally arranged in the steam-water system, the tail flue inlet collection box is connected with a ceiling heat exchange tube, the rear screen superheater is connected with a high temperature superheater, the wall type superheater, the full large screen superheater and the rear screen superheater are all arranged on the upper part of the hearth, and the wall type superheater is arranged around the upper part of the hearth and shields the water wall of the hearth at the; the utility model discloses not only can produce a large amount of high temperature hot-blasts, and capacious, heat utilization rate is high, the wind temperature is adjustable to synchronous production high-quality steam is used for the system electricity generation, has improved coal industry fine coke heat utilization rate greatly, has the advantage of high efficiency, energy-conservation, environmental protection.
Description
Technical Field
The utility model relates to a hot blast stove, in particular to a coal-fired boiler type hot blast stove using coke powder as fuel.
Background
The existing hot blast stove mostly adopts a combustion type or a heat exchange type, and heat storage devices are required to be arranged to alternately heat and discharge cold air, so that the hot blast stove has the defects of small capacity, low heat utilization rate and difficulty in adjusting air temperature; in the existing processes of coal chemical industry for producing gas, coal for producing oil, coal for producing methanol, coal for producing alkane and the like, coal pyrolysis is a very key technical link, and a large amount of coke powder is generated after coal pyrolysis; on one hand, large-scale coal chemical industry needs a large amount of low-dust, low-oxygen and high-temperature hot air as a pyrolysis medium, and the pyrolysis medium usually adopts natural gas and biomass gas as fuels; or coal is used as fuel, a chain furnace or fluidized bed combustion mode is adopted, and on the other hand, a large amount of coke powder generated after coal chemical industry has high heat value and large quantity, but the treatment is difficult, so that the environmental protection pressure is caused, and the high-efficiency utilization of resources is not realized.
Disclosure of Invention
The utility model aims at prior art's the aforesaid is not enough, provides a coal fired boiler formula hot-blast furnace, and it regards as fuel with the burnt powder that the coal industry produced, not only can produce a large amount of high temperature hot-blasts, and capacious, heat utilization rate is high, wind temperature is adjustable to synchronous production high-quality steam is used for the system electricity generation, has improved the burnt powder heat utilization rate of coal industry greatly, has the advantage of high efficiency, energy-conservation, environmental protection.
In order to achieve the purpose, the utility model discloses a coal fired boiler type hot blast stove, which comprises a hearth, a tail flue, a combustion system and a steam-water system, wherein the combustion system comprises a primary air fan, a fuel bin, a burner, a secondary air fan and a plurality of secondary air nozzles which are connected, and the burner is provided with a plurality of nozzles; the steam-water system comprises a drum, a downcomer, a water-cooled wall lower header, a hearth water-cooled wall, a water-cooled wall upper header, an economizer, a ceiling inlet header, a ceiling heat exchange tube and a high-temperature superheater; the method is characterized in that: the steam-water system also comprises a tail flue inlet header, a tail flue lower header, a wall type superheater inlet header, a wall type superheater, a full-large-screen superheater and a rear-screen superheater which are sequentially connected, wherein the tail flue inlet header is connected with a ceiling heat exchange tube, the rear-screen superheater is connected with a high-temperature superheater, the wall type superheater, the full-large-screen superheater and the rear-screen superheater are all arranged on the upper part of a hearth, and the wall type superheater is arranged on the periphery of the upper part of the hearth and shields a rear hearth water-cooled wall;
the coal economizer of the utility model is arranged in the chemical equipment with higher temperature; the coke powder as fuel is blown from a fuel bin by a primary fan and is sent into each nozzle of a combustor, a secondary fan sends ambient cold air into each secondary air nozzle, the ambient cold air and the primary air are mixed and combusted in a hearth, and high-temperature flue gas becomes hot air after exchanging heat with a hearth water-cooled wall, a wall type superheater, a full-large screen superheater, a rear screen and a high-temperature superheater and enters chemical equipment through a tail flue; the low-temperature feed water is heated by an economizer in chemical equipment and then is fed into a drum, the undersaturated water enters a furnace water-cooled wall through a downcomer and a water-cooled wall lower header to be heated, then enters the drum from a water-cooled wall upper header, and the separated steam passes through a ceiling inlet header and a ceiling heat exchange tube and then is fed into a tail flue inlet header, a tail flue lower header, a wall type superheater inlet header, a wall type superheater, a full-large-screen superheater, a rear-screen superheater and a high-temperature superheater and then enters a steam turbine through a steam connecting pipe to generate power; the wall type superheater shields the rear hearth water-cooled wall, so that the heat absorption capacity of the hearth water-cooled wall is reduced, and the heat receiving surface is not arranged behind the high-temperature superheater, so that the air temperature at the outlet of the hot blast stove can be increased; the utility model takes the coke powder generated in the coal chemical industry as fuel, adopts a coal-fired furnace type, has no heat storage device, can continuously supply hot air, can generate a large amount of high-temperature hot air, has large capacity and high heat utilization rate, synchronously generates high-quality steam for system power generation, greatly improves the heat utilization rate of the coke powder in the coal chemical industry, and has the advantages of high efficiency, energy conservation and environmental protection;
as a further improvement of the utility model, the utility model also comprises a afterburning system which comprises an afterburning bunker, a control valve, an afterburning nozzle and an air distribution pipe which are connected, wherein the afterburning nozzle and the air distribution pipe are both arranged on the rear wall of the tail flue, and the air distribution pipe is connected with a secondary fan through a duct valve; when the air temperature at the outlet of the hot blast stove is low, the afterburning system is put into use, and the control valve and the air duct valve are opened to improve the air temperature; the after-burning fuel can be heavy oil, light oil, natural gas, coke oven gas or biomass gas and the like;
as a further improvement of the utility model, the utility model also comprises an air temperature adjusting system, which comprises a circulating fan and a plurality of temperature adjusting air ports which are connected with the circulating fan through respective air doors, wherein the temperature adjusting air ports are all arranged in the combustion area of the hearth, and the circulating fan is also connected with an air distribution pipe through a cooling air valve; when the temperature of the hot air is higher, the circulating fan is started, and the air door and the cooling air valve are opened, so that the temperature of the hot air can be reduced;
as a further improvement of the utility model, the burners are divided into an upper group and a lower group for swinging burners and are arranged in a hedging way or in a tangential way at four corners; the central height of the flame can be adjusted through the adjustment of the swing angle, so that the air temperature at the outlet of the hot blast stove can be adjusted; the burners are divided into an upper group and a lower group, and when the burners normally run, the burners of the lower group are put into use; when the temperature of the smoke at the outlet of the hearth is reduced, the upper group of burners is also used, the flame center is improved, and the outlet air temperature is further improved;
as a further improvement of the utility model, a plurality of nozzles and a plurality of secondary air nozzles of the upper and lower groups of burners are arranged at intervals in the longitudinal direction, and a plurality of temperature adjusting air ports are arranged between the plurality of nozzles and the plurality of secondary air nozzles of the burners at intervals in the longitudinal direction; the outlet air temperature can be flexibly adjusted according to the combustion and air temperature conditions;
as a further improvement of the utility model, a first-stage water spray desuperheater is arranged between the full-large-screen superheater and the rear-screen superheater; a second-stage water spraying desuperheater is arranged between the rear screen superheater and the high-temperature superheater; the steam temperature can be adjusted;
to sum up, the utility model discloses the fine coke that produces with the coal chemical industry is as fuel, not only can produce a large amount of high temperature hot-blasts, and capacious, heat utilization rate is high, the wind temperature is adjustable to produce high-quality steam in step and be used for the system electricity generation, improved the fine coke heat utilization rate of coal chemical industry greatly, have high efficiency, energy-conservation, advantage of environmental protection.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the coal-fired boiler type hot-blast stove of the embodiment comprises a hearth 1, a tail flue 2, a combustion system, a afterburning system, a steam-water system and an air temperature adjusting system, wherein the combustion system comprises a primary air fan 3, a fuel bin 4, a swing burner, a secondary air fan 6 and a plurality of secondary air nozzles 7 which are connected, the swing burner is provided with a plurality of nozzles 5, the swing burner is divided into an upper group and a lower group which are arranged in opposite direction, the upper group of swing burner comprises two layers of nozzles, and the lower group of swing burner comprises four layers of nozzles; the afterburning system is connected with an afterburning bunker 8, a control valve 9, an afterburning nozzle 10 and an air distribution pipe 11, the afterburning nozzle 10 and the air distribution pipe 11 are both arranged on the rear wall of the tail flue 2, and the air distribution pipe 11 is connected with the secondary fan 6 through an air duct valve 12; the circulating fan 13 of the air temperature adjusting system and three temperature adjusting air ports 15 which are connected with the circulating fan 13 through respective air doors 14 are arranged in a combustion area of the hearth 1, and the circulating fan 13 is also connected with the air distribution pipe 11 through a cooling air valve 16; a plurality of nozzles 5 and a plurality of secondary air nozzles 7 of the upper and lower groups of swing burners are longitudinally arranged at intervals, and three temperature-adjusting air ports 15 are longitudinally divided into an upper layer, a middle layer and a lower layer which are arranged between the plurality of nozzles 5 and the plurality of secondary air nozzles 7 of the swing burners at intervals; the steam-water system comprises a boiler barrel 17, a downcomer 18, a water-cooled wall lower header 19, a hearth water-cooled wall, a water-cooled wall upper header 20, an economizer 21, a ceiling inlet header 22, a ceiling heat exchange tube 23, a tail flue inlet header 24, a tail flue lower header 25, a wall type superheater inlet header 26, a wall type superheater 27, a full large screen superheater 28, a rear screen superheater 29 and a high temperature superheater 30 which are sequentially connected, the wall type superheater 27, the full large screen superheater 28, the rear screen superheater 29 and the high temperature superheater 30 are all arranged on the upper part of a hearth, and the wall type superheater 27 is arranged on the periphery of the upper part of the hearth and shields the rear hearth water-cooled wall; a first-stage water spray desuperheater 31 is arranged between the full-large-screen superheater 28 and the rear-screen superheater 29; a second-stage water spray desuperheater 32 is arranged between the rear screen superheater 29 and the high-temperature superheater 30;
the coal economizer 21 of the utility model is arranged in the chemical equipment 33 with higher temperature, the circulating fan 13 is connected with the smoke outlet of the chemical equipment 33, and dust-free cold smoke is adopted for recycling, thereby reducing the oxygen content and dust content of hot air; when the device is used, high-temperature coke powder serving as fuel is blown from a fuel bin 4 by a primary fan 3 and is fed into each nozzle 5 of a swing combustor, cold air fed by the primary fan 3 cools the high-temperature coke powder from 290 ℃ to 85-95 ℃, ambient cold air is fed into each secondary air nozzle 7 by a secondary fan 6 and is mixed with the primary air for combustion in a hearth 1, high-temperature flue gas is converted into hot air after heat exchange with a hearth water-cooled wall, a wall type superheater 27, a full-large screen superheater 28, a rear screen superheater 29 and a high-temperature superheater 30, and the hot air enters chemical equipment through a tail flue 2 and provides 850-950 ℃ low-oxygen, low-dust and high-capacity high-temperature hot air for a chemical system; the low-temperature feed water is heated by an economizer 21 in chemical equipment 33 and then is fed into a drum 17, the undersaturated water enters a furnace water-cooled wall through a downcomer 18 and a water-cooled wall lower header 19 to be heated, then enters the drum 17 from a water-cooled wall upper header 20, the separated steam passes through a ceiling inlet header 22 and a ceiling heat exchange tube 23 and then is fed into a tail flue inlet header 24, a tail flue lower header 25, a wall type superheater inlet header 26, a wall type superheater 27, a full-large-screen superheater 28, a rear-screen superheater 29 and a high-temperature superheater 30 and then enters a steam turbine through a steam connecting pipe to generate power; the wall type superheater 27 reduces the heat absorption capacity of the hearth water wall due to shielding the rear hearth water wall, and can improve the air temperature at the outlet of the hot blast stove due to the fact that no heating surface is arranged behind the high-temperature superheater 30; the utility model takes the coke powder generated in the coal chemical industry as fuel, reduces the environmental protection pressure, adopts a coal-fired furnace type, has no heat storage device, can continuously supply hot air, can generate a large amount of high-temperature hot air, has large capacity and high heat utilization rate, synchronously generates high-quality steam for system power generation, greatly improves the heat utilization rate of the coke powder in the coal chemical industry, and has the advantages of high efficiency, energy conservation and environmental protection; when the air temperature at the outlet of the hot blast stove is lower, the afterburning system is put into use, the control valve 9 and the air duct valve 12 are opened to improve the air temperature, and afterburning fuel can be heavy oil, light oil, natural gas, coke oven gas or biomass gas and the like; if the hot air temperature is higher, the circulating fan 13 is started, the air door 14 and the cooling air valve 16 are opened, and the hot air temperature can be reduced; the central height of flame can be adjusted by adjusting the swing angle of each nozzle 5 of the swing burner, so that the air temperature at the outlet of the hot blast stove can be adjusted; the burners are divided into an upper group and a lower group, and when the burners normally run, the burners of the lower group are put into use; when the temperature of the smoke at the outlet of the hearth is reduced, the upper group of burners is also used, the flame center is improved, and the outlet air temperature is further improved; the steam temperature can be adjusted through the first stage water spray desuperheater 31 and the second stage water spray desuperheater 32;
the utility model is not limited to the above embodiment, if the swinging burner is also divided into two sets of upper and lower and is arranged in a four-corner tangential circle.
Claims (6)
1. A coal-fired boiler type hot blast stove comprises a hearth, a tail flue, a combustion system and a steam-water system, wherein the combustion system comprises a primary air fan, a fuel bin, a burner, a secondary air fan and a plurality of secondary air nozzles which are connected, and the burner is provided with the plurality of nozzles; the steam-water system comprises a drum, a downcomer, a water-cooled wall lower header, a hearth water-cooled wall, a water-cooled wall upper header, an economizer, a ceiling inlet header, a ceiling heat exchange tube and a high-temperature superheater; the method is characterized in that: the steam-water system further comprises a tail flue inlet header, a tail flue lower header, a wall type superheater inlet header, a wall type superheater, a full-large-screen superheater and a rear-screen superheater which are sequentially connected, the tail flue inlet header is connected with the ceiling heat exchange tube, the rear-screen superheater is connected with the high-temperature superheater, the wall type superheater, the full-large-screen superheater and the rear-screen superheater are all arranged on the upper portion of the hearth, and the wall type superheater is arranged on the periphery of the upper portion of the hearth and shields the water-cooled wall of the hearth at the rear.
2. The coal fired boiler hot blast stove according to claim 1, characterized in that: the afterburning system comprises an afterburning bunker, a control valve, an afterburning nozzle and an air distribution pipe which are connected, wherein the afterburning nozzle and the air distribution pipe are both arranged on the rear wall of the tail flue, and the air distribution pipe is connected with the secondary fan through an air duct valve.
3. A coal fired boiler hot blast stove according to claim 1 or 2, characterized in that: the air temperature adjusting system comprises a circulating fan and a plurality of temperature adjusting air ports which are connected with the circulating fan through respective air doors, the plurality of temperature adjusting air ports are arranged in a combustion area of the hearth, and the circulating fan is connected with an air distribution pipe through a cooling air valve.
4. A coal fired boiler hot blast stove according to claim 3, characterized in that: the burners are divided into an upper group and a lower group for swinging burners and are arranged in a hedging way or arranged in a tangential way at four corners.
5. The coal fired boiler hot blast stove according to claim 4, characterized in that: the plurality of nozzles and the plurality of secondary air nozzles of the upper and lower groups of burners are longitudinally arranged at intervals, and the plurality of temperature adjusting air ports are longitudinally arranged between the plurality of nozzles and the plurality of secondary air nozzles of the burners at intervals.
6. The coal fired boiler hot blast stove according to claim 4, characterized in that: a first-stage water spraying desuperheater is arranged between the full-large-screen superheater and the rear-screen superheater; and a second-stage water spray desuperheater is arranged between the rear screen superheater and the high-temperature superheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920581946.XU CN210050992U (en) | 2019-04-26 | 2019-04-26 | Coal-fired boiler type hot-blast stove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920581946.XU CN210050992U (en) | 2019-04-26 | 2019-04-26 | Coal-fired boiler type hot-blast stove |
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| CN210050992U true CN210050992U (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920581946.XU Active CN210050992U (en) | 2019-04-26 | 2019-04-26 | Coal-fired boiler type hot-blast stove |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117366546A (en) * | 2023-12-07 | 2024-01-09 | 四川铭能科技开发有限公司 | Gas turbine tail gas afterburning system based on hot-blast furnace |
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2019
- 2019-04-26 CN CN201920581946.XU patent/CN210050992U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117366546A (en) * | 2023-12-07 | 2024-01-09 | 四川铭能科技开发有限公司 | Gas turbine tail gas afterburning system based on hot-blast furnace |
| CN117366546B (en) * | 2023-12-07 | 2024-03-19 | 四川铭能科技开发有限公司 | Gas turbine tail gas afterburning system based on hot-blast furnace |
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