CN201392103Y - Mine heated furnace flue-gas waste-heat generating system - Google Patents

Mine heated furnace flue-gas waste-heat generating system Download PDF

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Publication number
CN201392103Y
CN201392103Y CN200920135043U CN200920135043U CN201392103Y CN 201392103 Y CN201392103 Y CN 201392103Y CN 200920135043 U CN200920135043 U CN 200920135043U CN 200920135043 U CN200920135043 U CN 200920135043U CN 201392103 Y CN201392103 Y CN 201392103Y
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CN
China
Prior art keywords
pressure
waste heat
generating
ore deposit
furnace flue
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Application number
CN200920135043U
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Chinese (zh)
Inventor
吴迅海
王韶锋
王富生
张海红
黄勇
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宇星科技发展(深圳)有限公司
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Priority to CN200920135043U priority Critical patent/CN201392103Y/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Abstract

The utility model discloses a mine heated furnace flue-gas waste-heat generating system and comprises a mine heated furnace, a mixed-pressure waste-heat boiler, a high-voltage steam drum, a low-voltage steam drum, a generator set and a condenser, wherein the mine heated furnace is connected with the mixed-pressure waste-heat boiler which is connected with the generator set through the high-voltage steam drum and the low-voltage steam drum, the generator set is connected with the mixed-pressure waste-heat boiler through the condenser, and superheated steam produced in the mixed-pressure waste-heat boiler is inputted to the generator set after treatment of the high-voltage steam drum and the low-voltage steam drum for pushing the generation of the generator set. Compared with the prior art, the system digs out the waste-heat potentials of the mine heated furnace at maximum under the circumstances of not influencing production according to energy step utilization principles, reclaims for use, and creates larger economic benefits for enterprises.

Description

A kind of mineral heating furnace flue afterheat generating system
Technical field:
The utility model belongs to hot technical field of power generation, particularly a kind of mineral heating furnace flue afterheat generating system.
Background technology:
The hot stove in ore deposit claims electric arc electric furnace or resistance electric furnace again, is mainly used in raw materials such as reduction ore, carbonaceous reducing agent and solvent, produces ferrosilicon, ferromanganese, ferroalloys such as ferrochrome, ferrotungsten, silicomangan.It is a kind of high energy-consuming industry electric furnace of working continuously, its work characteristics is to adopt carbonaceous or magnesia refractories to make furnace lining, uses from training electrode and inserts furnace charge and carry out arc-covering slag operation, utilize the energy of electric arc and electric current by furnace charge produce power come smelting metal, reinforced successively, batch (-type) goes out scum.
The hot stove in domestic newly-built ore deposit is in order to reduce the exhaust-gas treatment amount at present, save the investment of cleaner, adopt the semi-enclosed structure of short petticoat pipe mostly, by petticoat pipe gate control air inlet, so that the completing combustion of reduction furnace gas is as the criterion, utilize air to cool indirectly again, reach of the requirement of back deduster temperature.The shortcoming of this method is to account for stove energy expenditure 15~35% fume afterheats to fail to utilize, and not only causes the difficulty of follow-up dedusting, and has wasted a large amount of energy, and is not only uneconomical but also unreasonable.
Cool indirectly if change air, make full use of its exhaust gas temperature and reach 400~600 ℃, flow reaches 14 * 10 4~17 * 10 4m 3The middle low-temperature flue gas of/h produces the generating of low taste superheated steam pushing turbine by waste heat boiler, can make the hot stove synthesis energy saving in ore deposit of The ferroalloy industry reach 20~25%, can thoroughly change the product energy consumption state of high energy consumption, alleviate the power shortages problem, for enterprise creates certain economic benefits, and then solve the energy problem that becomes increasingly conspicuous in the The ferroalloy industry.
But exhaust gas volumn is less when doing owing to the hot furnaceman in ore deposit, smelt early stage, mid-term, later stage operating mode difference simultaneously, can cause mineral heating furnace flue amount, flue-gas temperature fluctuation range bigger, the exhaust gas dust particle diameter is little, light weight, easy bonding, simultaneously because technical difficulty, cost of equipment costlinesses etc. have also seriously restricted development and the application of mineral heating furnace flue afterheat generating system in The ferroalloy industry.
Summary of the invention:
For addressing the above problem, the purpose of this utility model is to propose a kind of mineral heating furnace flue afterheat generating system.
For achieving the above object, the utility model is mainly by the following technical solutions:
A kind of mineral heating furnace flue afterheat generating system, comprise the hot stove in ore deposit (1), two pressure waste heat boilers (2), high pressure drum (3), low-pressure drum (4), generating set (5) and condenser (6), the hot stove in described ore deposit (1) is connected with two pressure waste heat boilers (2), two pressure waste heat boilers (2) are by high pressure drum (3), low-pressure drum (4) is connected with generating set (5), described generating set (5) then is connected with two pressure waste heat boilers (2) by condenser (6), steam in the hot stove of its chats (1) is by high pressure drum (3), low-pressure drum (4) is input in the generating set (5) after handling, pushing generator group (5) generating.
Be provided with damper valve (12) between the hot stove in described ore deposit (1) and the two pressure waste heat boiler (2).
Be connected with cooling tower (7) on the described condenser (6).
Be provided with condensate pump (8) between described condenser (6) and the two pressure waste heat boiler (2).
Wherein also comprise a chimney (16), this chimney (16) is connected with the hot stove in ore deposit (1), two pressure waste heat boiler (2) by swirling flow deduster (14), sack cleaner (15) and high-temperature blower (13).
The hot stove in described ore deposit (1) also is provided with acoustic wave ash ejector and fuel gas pulse ash blower device.
The utility model can make the hot in-furnace dust particle in ore deposit be the suspension fluidized state by acoustic wave ash ejector and fuel gas pulse ash blower device, so that discharge.Compared with prior art, native system excavates the waste heat potentiality of the hot stove in ore deposit to greatest extent according to the cascaded utilization of energy principle under the situation that does not influence production, recycles, for enterprise creates bigger ground economic benefit.
Description of drawings:
Fig. 1 is the utility model system flow chart.
Fig. 2 is the utility model acoustic wave ash ejector schematic diagram.
Fig. 3 is the utility model fuel gas pulse ash blower device schematic diagram.
Identifier declaration among the figure: the 1. hot stove in ore deposit, 2. pair pressure waste heat boiler, 3. high pressure drum, 4. low-pressure drum, 5. generating set, 6. condenser, 7. cooling tower, 8. condensate pump, 9. condensed water heater, 10. boiler carries oxygen-eliminating device, 11. high-pressure hydraulic pumps, 12. damper valves, 13. high-temperature blower, 14. swirling flow dedusters, 15. sack cleaners, 16. chimney, 21. superheated steams, 22. 3 connect part, 23. oil droplet, 24. cooling airs, 25. metallic membranes, 26. sound wave, 41. burner hearths and high-temperature area dust stratification heating surface, 31. air, 32. fuel gas, 33. blender, 34. igniters, 35. flame conduits, 36. surge generator, 37. the shock wave emission spout, 38. hit ripple, 42. waste heat boiler afterbody dust stratification heating surfaces.
The specific embodiment:
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
See also shown in Figure 1, the utility model provides a kind of mineral heating furnace flue afterheat generating system, it mainly includes the hot stove 1 in ore deposit, two pressure waste heat boilers 2, high pressure drum 3, low-pressure drum 4, generating set 5 and condenser 6, wherein generating set 5 is the pure condensing Turbo-generator Set of filling, in the hot stove 1 in ore deposit acoustic wave ash ejector and fuel gas pulse ash blower device are installed also, the hot stove 1 in the ore deposit here, be connected with two pressure waste heat boilers 2 and chimney 16 respectively, and also be provided with damper valve 12 in the junction, enter two pressure waste heat boilers 2 and chimney 16 with the steam of controlling respectively in the hot stove 1 in ore deposit.
Be connected with high-temperature blower 13 in turn between the hot stove 1 in wherein above-mentioned chimney 16 and ore deposit, swirling flow deduster 14 and sack cleaner 15 make flue gas carry out dust removal process before entering chimney; At first ducted flue gas is blown in the swirling flow deduster 14, the dust-filtering of larger particles in the flue gas is fallen, will remove than the dust of granule entering sack cleaner 15 then, by chimney 16 flue gas is discharged at last by high-temperature blower 13.
Flue gas in the hot stove 1 in ore deposit enters into two pressure waste heat boilers 2 after by damper valve 12 and carries out heat exchange, two pressure waste heat boilers 2 then are connected with generating set 5 by high pressure drum 3, low-pressure drum 4, described generating set 5 is connected with two pressure waste heat boilers 2 by condenser 6, the superheated steam that produces in wherein two pressure waste heat boilers 2 is input in the generating set 5 after handling by high pressure drum 3, low-pressure drum 4,5 generatings of pushing generator group.
Wherein flow through and be arranged in two pressure waste heat boilers 2 on the flue from the flue gas of the hot stove 1 in ore deposit, produce 0.69~1.27Mpa, 280~340 ℃ the overheated main steam of middle pressure by high pressure drum 3 respectively, and by low-pressure drum 4 produce 0.1~0.5Mpa, 0~160 ℃ low area overheat is mended steam, thereby promote pure condensation Steam Turbine 5 generatings of filling; Finish steam after the merit is condensed into 0~40 ℃ through condenser 6 primary condensate and pump into the supplementing water that condensate water heater 9 heating back parts are made pressure drum 4 by condensate pump 8, another part is through boiler feed 10, pump into high pressure drum 3 by high-pressure hydraulic pump 11, form the closed cycle loop; The flue-gas temperature that flows out two pressure waste heat boilers 2 can be reduced to 100~120 ℃, passes through chimney 16 qualified discharges again after high-temperature blower 13 enters swirling flow deduster 14, sack cleaner 15 recovery dust; Electricity generation system is in parallel with original flue gas system, if the waste heat boiler generating set breaks down, control system can be switched damper valve 12 to original flue gas system fast and move, fully guarantees the safety of main technology and normally moves.
As shown in Figure 2, Fig. 2 is the utility model acoustic wave ash ejector schematic diagram.Wherein acoustic wave ash ejector is installed in the hot stove 1 in ore deposit, at first superheated steam 21 connects part 22 generation oil droplet 23 and cooling airs 24 through three, and cooling air 24 reaches metallic membrane 25 generation sound waves 26, the soot particle of burner hearth and high-temperature area dust stratification heating surface 41 produces resonance under the effect of acoustic wave energy, destruction and prevention grey particle are in the heat exchange surface combination, make it to be in the suspension fluidized state, so that flue gas or gravity are taken away it.
As shown in Figure 3, Fig. 3 is the utility model fuel gas pulse ash blower device schematic diagram.Wherein fuel gas 32 and air 31 fully mix in blender 33 with certain proportion, enter into surge generator 36 by suitable technological process, light the flammable premixed gas body by high-energy igniter 34 and flame conduit 35, in surge generator 36, produce shock wave 38, shock wave acts on the waste heat boiler afterbody dust stratification heating surface 42 by emission spout 37, under the comprehensive function of its kinetic energy, acoustic energy and heat energy, thereby remove dust stratification on the heating surface effectively.
More than be the explanation to the utility model structural principle, wherein the utility model also can further be realized by following measure:
Adopt two no afterburning natural circulation boilers of pressing, better satisfy the waste heat recovery of the hot stove low-temperature flue gas in ore deposit and the requirement of dedusting, the superheated steam of the two-way different pressures that boiler produces can satisfy the admission requirement of common low-pressure turbine; Compare with flash distillation saturated vapor waste heat boiler, not only significantly reduced the cost of steam turbine, improved the generating efficiency of steam turbine generator simultaneously; Vertical structure is adopted in boiler erection, flue gas is from top to bottom by superheater, evaporimeter, economizer, every section heating surface of boiler adopts the box type structure integral body to dispatch from the factory, not only ensure the quality of products but also can shorten on-the-spot installation period the user, while is low-grade at flue gas, and heating surface adopts the finned tube augmentation of heat transfer; Boiler self deaerating type of cycles, deoxygenation is provided by the waste heat boiler low pressure evaporator with vapour, and other moisturizing is supplied with by changing water station.
At the characteristics of mineral heating furnace flue high temperature and high viscosity, utilize characteristics such as fuel gas pulse ash blower device ash-removal effect is good and applied widely, preferentially select the fuel gas pulse ash blower device for use at the lower back-end surfaces of flue-gas temperature; Utilize acoustic wave ash ejector can clean main vapour and blow characteristics such as grey unapproachable position and equipment is simple, preferentially select acoustic wave ash ejector for use at waste heat boiler burner hearth and high-temperature area, reach and remove the dust stratification that the hot stove flue dust in ferroalloy ore deposit produces effectively in waste heat boiler; Adopt the pure condensing Turbo-generator Set of filling, filling cylinder is a convergent scroll casing type structure, guarantees that low-pressure steam can evenly cover steam turbine, can evenly mix with main steam after covering; Exhaust stage blade adopts twisted blade, cylinder thermal performance and Efficiency of Steam Turbine behind the raising steam turbine;
The steam turbine condenser outlet is provided with two condensate pumps (1 usefulness 1 is equipped with) between steam turbine, and also as the low pressure feed water pump of waste heat boiler, condensate water is connected to the oxygen-eliminating device of waste heat boiler to condensate pump.The outlet of every waste heat boiler low pressure drum (deoxygenation water tank) is provided with 2 high pressure water pumps (1 usefulness 1 is equipped with), presses drum during the water after the deoxygenation is squeezed into; Adopt water jet air ejector as the condenser vaccum-pumping equipment, have that energy consumption is low, noise is little, reliable a, advantage such as load accommodation is big, two water-jet pumps, 1 usefulness 1 is equipped with, and need not configuration startup steam bleeding system in addition again; Cooling tower adopts the novel plastic filler, to improve the cooling tower thermodynamic efficiency, simultaneously in order to reduce gas-flow resistance in the tower, adopts tubular type in conjunction with water distribution mode, dehydrater is set wafts with minimizing and drip ambient influnence and using water wisely; If one the shunt valve that directly discharges water to the cooling tower storage cistern to solve the requirement of cooling tower preventing freeze in winter, is taked dosing scale removal, anti-algae, blowdown and other filter measure simultaneously, guarantee good, stable operation.
More than a kind of mineral heating furnace flue afterheat generating system provided by the utility model is described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.

Claims (6)

1, a kind of mineral heating furnace flue afterheat generating system, it is characterized in that comprising the hot stove in ore deposit (1), two pressure waste heat boilers (2), high pressure drum (3), low-pressure drum (4), generating set (5) and condenser (6), the hot stove in described ore deposit (1) is connected with two pressure waste heat boilers (2), two pressure waste heat boilers (2) are by high pressure drum (3), low-pressure drum (4) is connected with generating set (5), described generating set (5) then is connected with two pressure waste heat boilers (2) by condenser (6), the superheated steam that produces in wherein two pressure waste heat boilers (2) is by high pressure drum (3), low-pressure drum (4) is input in the generating set (5) after handling, pushing generator group (5) generating.
2, mineral heating furnace flue afterheat generating system according to claim 1 is characterized in that being provided with damper valve (12) between the hot stove in described ore deposit (1) and the two pressure waste heat boiler (2).
3, mineral heating furnace flue afterheat generating system according to claim 1 is characterized in that being connected with on the described condenser (6) cooling tower (7).
4, mineral heating furnace flue afterheat generating system according to claim 1 is characterized in that being provided with condensate pump (8) between described condenser (6) and the two pressure waste heat boiler (2).
5, mineral heating furnace flue afterheat generating system according to claim 1, it is characterized in that also comprising a chimney (16), this chimney (16) is connected with the hot stove in ore deposit (1), two pressure waste heat boiler (2) by swirling flow deduster (14), sack cleaner (15) and high-temperature blower (13).
6, mineral heating furnace flue afterheat generating system according to claim 1 is characterized in that the hot stove in described ore deposit (1) also is provided with acoustic wave ash ejector and fuel gas pulse ash blower device.
CN200920135043U 2009-02-24 2009-02-24 Mine heated furnace flue-gas waste-heat generating system CN201392103Y (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102121069A (en) * 2010-12-28 2011-07-13 陕西盛华冶化有限公司 Raw material of high purity silicon-calcium alloy and production equipment and production process thereof
CN102607287A (en) * 2012-04-10 2012-07-25 上海瑞恩能源投资有限公司 Ferro-nickel smelting process waste heat generating system
CN102620572A (en) * 2012-04-16 2012-08-01 北京世纪源博科技股份有限公司 Ferroalloy mine heat furnace system with waste heat power generation system
CN104132554A (en) * 2014-08-04 2014-11-05 常州德峰节能电力工程技术有限公司 Energy saving device for cyclic utilization of smoke of open smoke hood type silicon submerged arc furnace
CN104214755A (en) * 2014-07-31 2014-12-17 盐城市锅炉制造有限公司 Coke plant semi-coke dry-distillation low-temperature smoke waste heat utilizing method and system thereof
CN105066719A (en) * 2015-08-31 2015-11-18 山东省环能设计院有限公司 Waste heat power generation system based on comprehensive utilization of waste gas
CN106247309A (en) * 2016-08-23 2016-12-21 东方菱日锅炉有限公司 The monoblock type continuous blow down system of waste heat boiler
CN109724425A (en) * 2019-01-29 2019-05-07 四会市国耀铝业有限公司 A kind of heat accumulating type flue gas recovery device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102121069A (en) * 2010-12-28 2011-07-13 陕西盛华冶化有限公司 Raw material of high purity silicon-calcium alloy and production equipment and production process thereof
CN102607287A (en) * 2012-04-10 2012-07-25 上海瑞恩能源投资有限公司 Ferro-nickel smelting process waste heat generating system
CN102620572A (en) * 2012-04-16 2012-08-01 北京世纪源博科技股份有限公司 Ferroalloy mine heat furnace system with waste heat power generation system
CN104214755A (en) * 2014-07-31 2014-12-17 盐城市锅炉制造有限公司 Coke plant semi-coke dry-distillation low-temperature smoke waste heat utilizing method and system thereof
CN104214755B (en) * 2014-07-31 2015-12-23 江苏东九重工股份有限公司 The blue charcoal destructive distillation low-temperature flue gas waste heat Application way of a kind of coke plant and system thereof
CN104132554A (en) * 2014-08-04 2014-11-05 常州德峰节能电力工程技术有限公司 Energy saving device for cyclic utilization of smoke of open smoke hood type silicon submerged arc furnace
CN104132554B (en) * 2014-08-04 2016-04-20 常州德峰节能电力工程技术有限公司 A kind of energy saver opening smoke hood type silicon system mineral heating furnace flue and recycle
CN105066719A (en) * 2015-08-31 2015-11-18 山东省环能设计院有限公司 Waste heat power generation system based on comprehensive utilization of waste gas
CN105066719B (en) * 2015-08-31 2017-06-20 山东省环能设计院股份有限公司 Waste gas comprehensively utilizes afterheat generating system
CN106247309A (en) * 2016-08-23 2016-12-21 东方菱日锅炉有限公司 The monoblock type continuous blow down system of waste heat boiler
CN109724425A (en) * 2019-01-29 2019-05-07 四会市国耀铝业有限公司 A kind of heat accumulating type flue gas recovery device
CN109724425B (en) * 2019-01-29 2020-04-03 四会市国耀铝业有限公司 Heat accumulating type flue gas recovery device

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