CN2293715Y - Full burned blast-furnace gas high temperature & high voltage power station boiler - Google Patents
Full burned blast-furnace gas high temperature & high voltage power station boiler Download PDFInfo
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- CN2293715Y CN2293715Y CN 97203451 CN97203451U CN2293715Y CN 2293715 Y CN2293715 Y CN 2293715Y CN 97203451 CN97203451 CN 97203451 CN 97203451 U CN97203451 U CN 97203451U CN 2293715 Y CN2293715 Y CN 2293715Y
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Abstract
The utility model relates to a full burned blast-furnace gas high temperature and high voltage power station boiler. A hearth of the utility model is divided into a burning chamber and an upper hearth through girdling; the bottom of the hearth is provided with a closed flat boiler bottom with a certain angle; refractory materials are sprayed on a water-cooled wall of the burning chamber to form a burning protection belt; a flue of the tail is provided with a coal economizer with high boiling degree and a smoke side heat exchanger of a blast-furnace gas preheater. The hearth of the boiler is divided into two segments through the girdling to form the secondary mixing of gas; the unique structure of the burning chamber can ensure the stable burning and complete burning of the blast-furnace gas; a burner adopts the mixing of the strong rotational flow of the blast furnace gas and burning supporting air so that the utility model can operate stably under lower load; the utility model has the advantages of reasonable design, high heat efficiency and obvious economic benefits, and the waste of the energy and the environmental pollution are avoided.
Description
The utility model belongs to the station boiler field, is specifically related to a kind of high temperature high pressure electric power station boiler of fully burning blast-furnace gas.
Blast furnace gas is the attached production capacity source in a kind of iron and steel enterprise production process, accounts for 18～24% of enterprise's gross energy.Because its calorific value is lower, only is 3260～3762KJ/Nm
3, acting as a fuel to be directly used in has bigger difficulty in the industry.At present, this part energy is burnt but still have most of blast furnace gas to diffuse to air mainly as the fuel of hot-blast stove, coke oven, causes great energy waste and environmental pollution.
In China, blast furnace gas mainly is that the form with auxiliary fuel is used in the high-pressure boiler, is main fuel with the coal dust as the 500MW unit of Shoudu Iron and Steel Co private station, and it is 20% that the burning rate is mixed in the design of blast furnace gas, and actual can only mixing burns 7%.
It is high temperature high pressure electric power station boiler fuel, burning and stable fully burning blast-furnace gas with the blast furnace gas that the purpose of this utility model provides a kind of.
The high temperature high pressure electric power station boiler of this fully burning blast-furnace gas, adopt single drum, Natural Circulation, common downcomer, inverted U is arranged, it is characterized in that burner hearth is separated into combustion chamber 3 and upper furnace 7 two parts by with a tight waist 5, at the bottom of the open hearth of bottom 1 for band certain angle and sealing of burner hearth, burner 2 is arranged on the front-back wall of combustion chamber 3, sprayable refractory forms wall with refractory lining, refracto 6 on the water-cooling wall of combustion chamber 3, water-cooling wall links to each other with gas bag 8, pendant superheater 10 is lifted on the top of upper furnace, high temperature superheater 11, low temperature superheater 12 is arranged in the horizontal flue successively, steam 9 is arranged in the top that the boiler stove is stared at, steam 13 is arranged in the reversal chamber 14, in vertical well gas flue, be furnished with higher level's economizer 15 successively, subordinate's economizer 16, air preheater 17, back-end ductwork are furnished with the fume side heat exchanger 19 of blast furnace gas preheater.
Subordinate's economizer 16 one tunnel links to each other with drum, and one the tunnel links to each other with higher level's economizer 15, and the boiling degree of higher level's economizer 15 is 5～30%.
The gas preheating device is made up of fume side heat exchanger 19, coal gas side heat exchanger 20, and fume side heat exchanger 19 constitutes circulation with coal device side heat exchanger 20 by intermediate medium and carries out the heat transmission.
Burner is high-power bispin stream blast furnace gas burner, in the shell of burner, outwards be followed successively by central tube 21, blast furnace gas passage 22, combustion-supporting air channel 23 from the lining, high-energy firing gun 25 and coke-stove gas ignitron 26 are arranged in the central tube 21, flame monitor 24 is arranged in the blast furnace gas passage 22, in blast furnace gas passage 22, be furnished with blast furnace gas swirl vane 27, in combustion-supporting air channel 23, be furnished with combustion air swirl vane 28.The eddy flow direction of blast furnace gas swirl vane 27 and combustion air swirl vane 28 is identical, and the swirl strength of blast furnace gas and combustion air is respectively between 0.2～2.0.
The utlity model has following advantage:
1. because by-product---the blast furnace gas of this station boiler clean burn blast furnace ironmaking production in crossing saved a large amount of fire coals, avoid diffusing of blast furnace gas, caused the waste and the environmental pollution of the energy;
2. because the calorific value of blast furnace gas is lower, this boiler is divided into two section with burner hearth by the with a tight waist of centre for burning blast-furnace gas, make lower furnace constitute a relatively independent combustion chamber, add the setting of wall with refractory lining, refracto, reduce the heat absorption of combustion chamber, make lower furnace form the high-temperature region of a part, thereby guaranteed catching fire and smooth combustion of blast furnace gas, the secondary that has formed gas simultaneously when air flow stream is crossed waisting mixes, thus guaranteed the completing combustion of blast furnace gas and temperature evenly:
3. furnace bottom is kept away the formula structure for envelope, and cold wind can not enter burner hearth from the bottom, makes flameholding;
4. the employing of high boiling degree economizer has remedied the deficiency that recepts the caloric because of evaporation in the boiler stoves that reason caused such as blast furnace gas calorific value is low;
5. the gas preheating device has adopted separate type heat pipe exchanger, has avoided coal gas directly to contact with flue gas, and safety, reliable because the raising of blast furnace gas charging temperature has been created condition for the smooth combustion of blast furnace gas on the one hand, has improved fire box temperature on the other hand:
6. the used burner of this boiler is owing to adopt blast furnace gas and the strong eddy flow of combustion air mixes, for the present invention is creating condition than the stable operation under the underload:
7. this boiler design is reasonable, thermal efficiency height, and remarkable in economical benefits as the boiler of a 220t/h, per hour can be utilized 200,000 Nm
3Blast furnace gas, the Spring Festival holidays are economized about 150,000 tons of standard coal, direct economic benefit can reach more than 7,000 ten thousand yuan.
Embodiment of the present utility model respectively schemes referring to following:
Fig. 1 is the cutaway view of the high temperature high pressure electric power station boiler of fully burning blast-furnace gas
Fig. 2 is the half sectional view of high-power bispin stream blast furnace gas burner
The utility model be a kind of be high parameter station boiler such as Fig. 1 of unique fuel with blast furnace gas, adopt single drum, Natural Circulation, common downcomer, inverted U to arrange.Blast furnace gas sprays into combustion chamber 3 burnings from burner 2, after high-temperature flue gas is disposed in pendant superheater 10 heat absorptions on water-cooling wall around the burner hearth and upper furnace 7 tops, flow through high temperature superheater 11, the low temperature superheater 12 of horizontal flue in succession, flue gas is by they and steam 9 with after being arranged in steam 13 heat absorptions of reversal chamber, in tail vertical well, further lowered the temperature by upper and lower level economizer 15,16, air preheater 17, weary gas is sent to smoke stack emission by air-introduced machine at last by the fume side heat exchanger 19 preheating blast furnace gases of gas preheating device.
Boiler furnace is a kind of semi-open furnace, by waisting 5 burner hearth is divided into combustion chamber 3 and upper furnace 7.Spray refractory material on the water-cooling wall of combustion chamber 3 and formed wall with refractory lining, refracto 6, burner hearth bottom has adopted at the bottom of the open hearth of band certain angle 1 and sealing, because waisting 5 makes the combustion chamber relatively independent, add the setting of wall with refractory lining, refracto 6, thereby guaranteed catching fire and smooth combustion of blast furnace gas, the secondary that has formed gas simultaneously when air flow stream is crossed waisting 15 mixes, thereby has guaranteed the completing combustion of blast furnace gas.
Economizer is the economizer of a kind of minute two-stage, higher level's economizer is high boiling degree economizer, subordinate's economizer 16 produces undersaturated stove water, and a part is introduced drum 8 as rinse water, and all the other are sent to the steam water interface that higher level's economizer 15 produces the certain boiling degree of band.The employing of high boiling degree economizer has remedied the deficiency that recepts the caloric because of evaporation in the boiler stoves that reason caused such as blast furnace gas calorific value is low.
The gas preheating device is a kind of separate type heat pipe exchanger, and it is made up of fume side heat exchanger 19 and coal gas side heat exchanger 20 two parts, and is middle by communicating pipe carrying out the conveying of vapour or water.Because flue gas and coal gas are independent at a distance, it improves greatly than the safety coefficient of conventional gas change heater.After the present invention adopts the separate heat pipe gas change heater,, improved fire box temperature on the other hand because the raising of blast furnace gas charging temperature has been created condition for the smooth combustion of blast furnace gas on the one hand.
The utility model has been arranged 15 high-power high eddy flow blast furnace gas burners 2 at the front-back wall of upper furnace 7, and front wall divides three layers to arrange 9, and back wall divides has two-layerly arranged 6.
Blast furnace gas burner as shown in Figure 2, it is the high-power bispin stream blast furnace gas burner that a kind of boiler is used, and is made up of central tube 21, coke-stove gas ignitron 26, blast furnace gas passage 22, combustion air passage 23, blast furnace burning torch 25, flame monitoring rifle 24.Be provided with swirl vane 27,28 in blast furnace gas passage 22 and combustion air passage 23, blast furnace gas swirl vane 27 is identical with combustion air swirl vane 28 eddy flow directions.Combustion air enters volute by air inlet 29, and the air outlet of volute enters burner hearth through combustion-supporting air channel 23, combustion air swirl vane 28, and blast furnace gas enters burner hearth by air inlet 30, blast furnace gas passage 22, swirl vane 27.The blast furnace gas flow is controlled by control valve, and the combustion air flow is controlled by motor-operated control valve.This burner is owing to adopting the strong eddy flow of blast furnace gas and combustion air to mix, at 4000-16000Nm
3Can both guarantee in the burning capacity scope of/h that blast furnace gas has fully with combustion air mixes, for the present invention is creating condition than the stable operation under the underload.
Igniter fuel of the present utility model is a coke-stove gas, and its ignition order is: light the coke-stove gas of each layer earlier, the blast furnace gas of the front wall lower floor of then igniting, the blast furnace gas of the back wall lower floor of igniting then, the blast furnace gas of other layer that ignite at last.Coke-stove gas cut off after blast furnace gas ignited.
The utility model is per hour recycled blast furnace gas 200,000 Nm
3, therefore the blast furnace gas of Shoudu Iron and Steel Co diffuses rate to be reduced greatly, and generated energy improves greatly, and annual about 150,000 tons of the mark coal of saving estimates that the year economic benefit that steel band comes headed by the present invention reaches 7,000 ten thousand yuan.
The utility model is being equipped with conventional carbon monoxide in-line analyzer 8 and boiler safety protection system 4 on the female pipe of blast furnace gas and on the sidewall of back-end ductwork.
Successful implementation of the present utility model,, minimizing environmental pollution energy-saving and cost-reducing to Chinese iron and steel enterprise, the technological progress that promotes industry has produced huge directive significance.
Claims (5)
1. the high temperature high pressure electric power station boiler of a fully burning blast-furnace gas, adopt single drum, Natural Circulation, common downcomer, inverted U is arranged, it is characterized in that burner hearth is separated into combustion chamber (3) by (5) with a tight waist and last stove is stared at (7) two parts, at the bottom of the open hearth of the bottom of burner hearth (1) for band certain angle and sealing, burner (2) is arranged on the front-back wall of combustion chamber (3), sprayable refractory forms wall with refractory lining, refracto (6) on the water-cooling wall of combustion chamber (3), water-cooling wall links to each other with gas bag (8), pendant superheater 910) is lifted on the top that stove is stared at, high temperature superheater (11), low temperature superheater (12) is arranged in the horizontal flue successively, steam (9) is arranged in the top of boiler furnace, steam (13) is arranged in the reversal chamber (14), in vertical well gas flue, be furnished with higher level's economizer (15) successively, subordinate's economizer (16), air preheater (17), back-end ductwork are furnished with the fume side heat exchanger (19) of blast furnace gas preheater.
2. boiler according to claim 1 is characterized in that subordinate's economizer (16) a tunnel links to each other with drum, and one the tunnel links to each other with higher level's economizer (15), and the boiling degree of higher level's economizer (15) is 5～30%.
3. boiler according to claim 1 is characterized in that the gas preheating device is made up of fume side heat exchanger (19), coal gas side heat exchanger (20), and fume side heat exchanger (19) constitutes circulation with coal device side heat exchanger (20) by intermediate medium and carries out the heat transmission.
4. boiler according to claim 1, it is characterized in that burner is high-power bispin stream blast furnace gas burner, in the shell of burner, outwards be followed successively by central tube (21), blast furnace gas passage (22), combustion-supporting air channel (23) from the lining, high-energy firing gun (25) and coke-stove gas ignitron (26) are arranged in the central tube (21), flame monitor (24) is arranged in the blast furnace gas passage (22), in blast furnace gas passage (22), be furnished with blast furnace gas swirl vane (27), in combustion-supporting air channel (23), be furnished with combustion air swirl vane (28).
5. boiler according to claim 4 is characterized in that blast furnace gas swirl vane (27) is identical with the eddy flow direction of combustion air swirl vane (28), and the swirl strength of blast furnace gas and combustion air is respectively between 0.2～2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97203451 CN2293715Y (en) | 1997-04-15 | 1997-04-15 | Full burned blast-furnace gas high temperature & high voltage power station boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97203451 CN2293715Y (en) | 1997-04-15 | 1997-04-15 | Full burned blast-furnace gas high temperature & high voltage power station boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2293715Y true CN2293715Y (en) | 1998-10-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97203451 Expired - Fee Related CN2293715Y (en) | 1997-04-15 | 1997-04-15 | Full burned blast-furnace gas high temperature & high voltage power station boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2293715Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374524A (en) * | 2011-10-28 | 2012-03-14 | 西安热工研究院有限公司 | Secondary reheating system for power-station boiler |
| CN103277805A (en) * | 2013-06-18 | 2013-09-04 | 启东市海信机械有限公司 | BFG (blast furnace gas) combustion power generating system |
| CN104832904A (en) * | 2015-05-13 | 2015-08-12 | 湖南中冶长天节能环保技术有限公司 | Gas boiler for heating saturated steam and superheated steam achieving method |
| CN108779913A (en) * | 2016-03-31 | 2018-11-09 | 日立造船株式会社 | Mechanical grate type garbage incinerator provided with waste heat recovery boiler |
| CN109210564A (en) * | 2017-07-04 | 2019-01-15 | 上海梅山钢铁股份有限公司 | Gas boiler variable working condition low oxygen combustion control method |
-
1997
- 1997-04-15 CN CN 97203451 patent/CN2293715Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374524A (en) * | 2011-10-28 | 2012-03-14 | 西安热工研究院有限公司 | Secondary reheating system for power-station boiler |
| CN102374524B (en) * | 2011-10-28 | 2013-06-26 | 西安热工研究院有限公司 | Secondary reheating system for power-station boiler |
| CN103277805A (en) * | 2013-06-18 | 2013-09-04 | 启东市海信机械有限公司 | BFG (blast furnace gas) combustion power generating system |
| CN104832904A (en) * | 2015-05-13 | 2015-08-12 | 湖南中冶长天节能环保技术有限公司 | Gas boiler for heating saturated steam and superheated steam achieving method |
| CN104832904B (en) * | 2015-05-13 | 2017-06-16 | 湖南中冶长天节能环保技术有限公司 | A kind of gas boiler for heating saturated vapor and the method for obtaining superheated steam |
| CN108779913A (en) * | 2016-03-31 | 2018-11-09 | 日立造船株式会社 | Mechanical grate type garbage incinerator provided with waste heat recovery boiler |
| CN108779913B (en) * | 2016-03-31 | 2020-09-22 | 日立造船株式会社 | Mechanical grate type garbage incinerator provided with waste heat recovery boiler |
| CN109210564A (en) * | 2017-07-04 | 2019-01-15 | 上海梅山钢铁股份有限公司 | Gas boiler variable working condition low oxygen combustion control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Shougang Co., Ltd. Assignor: Capital Iron & Steel General Company Contract fulfillment period: In April 16, 2007, 5 years, the patent expires Contract record no.: 200210042 Denomination of utility model: Full burning blast furnace gas high temperature high pressure power plant boiler Granted publication date: 19981007 License type: Pai Ta Record date: 2002.6.3 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.4.16, 5 YEARS, EXPIRATION OF PATENT RIGHT Name of requester: BEIJING SHOUDU STEEL CO., LTD. Effective date: 20020603 |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |