CN104846139A - Blast furnace superconductive cooling waste heat power generation system based on bias adjustable current source - Google Patents
Blast furnace superconductive cooling waste heat power generation system based on bias adjustable current source Download PDFInfo
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- CN104846139A CN104846139A CN201510202053.6A CN201510202053A CN104846139A CN 104846139 A CN104846139 A CN 104846139A CN 201510202053 A CN201510202053 A CN 201510202053A CN 104846139 A CN104846139 A CN 104846139A
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Abstract
The invention discloses a blast furnace superconductive cooling waste heat power generation system based on a bias adjustable current source. The system is mainly formed by a blast furnace body (1), a power generation system (12), a steam utilization device, more than one superconductive annular heat transfer ring (2) in layered encircling arrangement along the side wall of the blast furnace body (1), pouring solidification bodies (10) made of wear-resisting heat-shock-resistant anti-permeability coal elastic refractory castables and arranged on each superconductive annular heat transfer ring (2), and lower conduits (32) connected in series with a lower circulation port of each superconductive annular heat transfer ring (2). According to the system, hot water obtained after heat transfer is exported in a concentrated manner through the superconductive annular heat transfer rings embedded in the side wall of the blast furnace body and annular pipeline systems corresponding to the superconductive annular heat transfer rings, so that heat transfer intensity is enhanced, heat transfer efficiency and cooling efficiency are improved, and cooling water temperature is improved from the original 40 DEG C to 250 DEG C; and then, the water is overheated to a temperature of 400 DEG C through twice applications of the superconductive annular heat transfer rings, and thus the cooling waste heat is allowed to be utilized for power generation.
Description
Technical field
The present invention relates to a kind of blast furnace cooling heat efficient power generation system, specifically, relate to a kind of blast furnace superconducting cooling residual heat power generation system based on biased adjustable current source.
Background technology
In blast furnace production process, furnace wall cooling needs to take away heat with a large amount of water, to reduce the temperature of furnace wall, thus meets the technological temperature demand that blast furnace normally produces.The surface radiating that blast furnace cools waste heat and the blast furnace furnace wall taken away accounts for 5% and 0.5% of blast furnace total heat consumption than respectively, need 400 ~ 800Kg coke to calculate to produce one ton of pig iron merely, the heat energy that the coke of the 20 ~ 40Kg that has an appointment produces has discharged with the form of cooling water heat.Produce the pig iron 60,000 ten thousand tons calculating per year with China, the heat energy being equivalent to 1200 ~ 2,400 ten thousand tons of coke of having an appointment has discharged with the form of subcooling hydro-thermal, and waste greatly.But, this part cannot be reclaimed with the heat energy of low temperature (40 DEG C) cold water with current existing technology in the world, simultaneously owing to existing high stove outer covering having a large amount of water cooling tube and simultaneously because blast furnace heat-sinking capability is not enough, existing high stove outer covering also needs to rely on furnace wall heat radiation with the amount reducing water cycle cooling heat dissipation, so cannot implement outside surface insulation.
In sum, there is great energy dissipation in current blast fumance, how fully effectively to utilize the waste heat and water at low temperature that slattern in blast furnace production process, can secondary recycling be the difficult problem that people will capture.
Summary of the invention
The object of the invention is to overcome current people cannot fully by the waste heat produced in blast fumance to carry out the defect of second stage employ, a kind of blast furnace superconducting cooling residual heat power generation system based on biased adjustable current source is provided.
To achieve these goals, the present invention realizes by the following technical solutions: a kind of blast furnace superconducting cooling residual heat power generation system based on biased adjustable current source, primarily of furnace body, power generation system, steam utilization apparatus, along the ring-like heat exchange ring of more than one superconduction that the sidewall layering circulating type of furnace body is arranged, the cast cured explosive body that the ring-like heat exchange ring of each superconduction is arranged, for being connected in series the upper conduit of the upper cycling mouth of the ring-like heat exchange ring of each superconduction, and form for the overflow pipe of the lower circulation port being connected in series each superconduction ring-like heat exchange ring; The ring-like heat exchange ring of described each superconduction is all connected with steam utilization apparatus by pipeline, and steam utilization apparatus is then connected with power generation system by pipeline.Simultaneously, described power generation system is by generator, the steam turbine be connected with steam utilization apparatus with the ring-like heat exchange ring of the superconduction at furnace body stove seat place and condenser, for absorb and reuse this condenser discharge the utilizing waste heat for refrigeration unit of waste heat, the steam water hybrid heater be connected with this utilizing waste heat for refrigeration unit, be connected to the blast furnace foundation pier water cooling tube between utilizing waste heat for refrigeration unit and steam water hybrid heater, be connected with utilizing waste heat for refrigeration unit and feed back and penetrate vapour supercharging blower in steam turbine, and be arranged on the waste heat control treatment system composition of utilizing waste heat for refrigeration unit inside; Described waste heat control treatment system is by kenotron rectifier U, be serially connected in the regulated transformer circuit between the cathode output end of kenotron rectifier U and cathode output end, the logic switching circuit be connected with regulated transformer circuit with the cathode output end of kenotron rectifier U respectively, the voltage stabilizing parallel control circuit be connected with logic switching circuit, and the biased adjustable current source be serially connected between regulated transformer circuit and voltage stabilizing parallel control circuit forms.
Further, described biased adjustable current source is by power amplifier P2, power amplifier P3, power amplifier P4, triode Q2, one end is connected with the output terminal of power amplifier P2, the resistance R13 that the other end is connected with the end of oppisite phase of power amplifier P3, N pole is connected with the output terminal of power amplifier P2, the Zener diode D6 that P pole is connected with the output terminal of power amplifier P4, one end is connected with the in-phase end of power amplifier P2, the other end is connected with the output terminal of power amplifier P4, the adjustable resistance R12 be then connected with the in-phase end of power amplifier P4 is held in its regulation and control, be serially connected in the resistance R18 between the output terminal of power amplifier P2 and the emtting electrode of triode Q2, be serially connected in the resistance R14 between the end of oppisite phase of power amplifier P3 and output terminal, one end is connected with the in-phase end of power amplifier P3, the resistance R16 that the other end is connected with the output terminal of power amplifier P3 after resistance R15, and one end is connected with the in-phase end of power amplifier P3, the resistance R17 that the other end is connected with the collector electrode of triode Q2 forms, the end of oppisite phase of described power amplifier P4 is connected with the emtting electrode of triode Q2, and its output terminal is then connected with the base stage of triode Q2, the grounded collector of described triode Q2, the in-phase end of described power amplifier P2 is then connected with the cathode output end of kenotron rectifier U, and resistance R15 is then connected with voltage stabilizing parallel control circuit with the tie point of resistance R16.
The drum that described steam utilization apparatus is connected with upper conduit by one end, the other end is connected with desuperheater with deoxygenator in turn through arm, the softened water tank be connected with power generation system, and the steam manifold be connected between the overflow pipe at furnace body furnace bosh place and desuperheater forms, described desuperheater is also connected with the upper conduit of furnace body furnace roof with stove seat place respectively by arm; Power generation system is also connected with drum through arm.
Described regulated transformer circuit is by power amplifier P1, transformer T, one end is connected with the in-phase end of power amplifier P1, the other end resistance R3 that the Same Name of Ends of the primary coil L1 of transformer T is connected after resistance R4 in turn, P pole is connected with the output terminal of power amplifier P1, the diode D1 that N pole is connected with the non-same polarity of the primary coil L1 of transformer T after resistance R5, P pole is connected with the cathode output end of kenotron rectifier U, the Zener diode D2 that N pole is connected with the tie point of resistance R4 with resistance R3, P pole is connected with the cathode output end of kenotron rectifier U, the Zener diode D3 that N pole is connected with the N pole of diode D1, positive pole is connected with the in-phase end of power amplifier P1, the polar capacitor C3 that negative pole is connected with the output terminal of power amplifier P1, P pole is connected with the Same Name of Ends of the secondary coil L2 of transformer T, N pole is in turn through inductance L 4, the diode D4 be connected with the non-same polarity of the secondary coil L2 of transformer T after electric capacity C6, positive pole is connected with the N pole of diode D4, the electric capacity C5 that negative pole is connected with the non-same polarity of the secondary coil L2 of transformer T, and P pole is connected with the non-same polarity of the secondary coil L3 of transformer T, the diode D5 that N pole is connected with the Same Name of Ends of the secondary coil L3 of transformer T after electric capacity C7 forms, the in-phase end of described power amplifier P1 is connected with the cathode output end of kenotron rectifier U, and its end of oppisite phase is then connected with the cathode output end of kenotron rectifier U.
Described logic switching circuit by variable resistor R1, resistance R2, and field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3 and field effect transistor MOS4 composition; One end of described variable resistor R1 is connected with the cathode output end of kenotron rectifier U, its other end is then connected with the grid of field effect transistor MOS1; One end of resistance R2 is connected with the cathode output end of kenotron rectifier U, its other end is connected with the grid of field effect transistor MOS2; The grid of field effect transistor MOS3 is connected with the source electrode of field effect transistor MOS1, it drains then respectively with the drain electrode of field effect transistor MOS2 and the drain electrode of field effect transistor MOS4 is connected, its source electrode external+12V voltage together with the source electrode of field effect transistor MOS1; The grid of field effect transistor MOS4 is connected with the source electrode of field effect transistor MOS2, its source ground.
Described voltage stabilizing parallel control circuit is by three terminal regulator W1, three terminal regulator W2, field effect transistor MOS5, triode Q1, positive pole is connected with the end of oppisite phase of power amplifier P1, negative pole is in turn through polar capacitor C1 that inductance L 5 is connected with the base stage of triode Q1 after inductance L 6, positive pole is connected with the output terminal of power amplifier P1, the polar capacitor C2 that negative pole is connected with the tie point of inductance L 6 with inductance L 5, one end is connected with the base stage of triode Q1, the resistance R6 of the other end ground connection after resistance R8, one end is connected with the Q pin of three terminal regulator W2, the resistance R7 that the other end is connected with the grid of field effect transistor MOS5, one end is connected with the source electrode of field effect transistor MOS5, the resistance R9 of the other end ground connection, positive pole is connected with the emtting electrode of triode Q1, the polar capacitor C8 that negative pole is connected with the source electrode of field effect transistor MOS5 after polar capacitor C9, positive pole is connected with the collector electrode of triode Q1, the polar capacitor C10 that negative pole is connected with the negative pole of polar capacitor C8, and positive pole is connected with the tie point of resistance R8 with resistance R6, the polar capacitor C4 that negative pole is connected with the source electrode of field effect transistor MOS5 forms, the S end of described three terminal regulator W1 is all connected with the negative pole of polar capacitor C2 with the S end of three terminal regulator W2, the R end of three terminal regulator W1 is connected with the source electrode of field effect transistor MOS3, and the R end of three terminal regulator W2 is then connected with the source electrode of field effect transistor MOS4, the Q end of described three terminal regulator W1 is then connected with the tie point of resistance R8 with resistance R6, and the drain electrode of field effect transistor MOS5 is connected with the end of oppisite phase of power amplifier P1, described resistance R15 is then connected with the base stage of triode Q1 with the tie point of resistance R16.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention's design is very reasonable, and not only structure is simple, well arranged, realization is convenient, level of automation is high, and can also effectively reduce manual shift error, can effectively reduce human cost.Meanwhile, the present invention need not arrange cooling tower more separately, not only can effective saves energy, also can reduce cooling water amount simultaneously, reduce running cost.
(2) the present invention concentrates the hot water after deriving heat exchange by the superconduction ring-like heat exchange ring be embedded on furnace body sidewall and the ring-like tubing system corresponded, therefore increase heat transfer intensity, improve heat exchange efficiency and cooling efficiency, and make traditional temperature of cooling water bring up to 250 DEG C from 40 DEG C, thus make the utilization of cooling heat become possibility.
(3) pipeline that the present invention is arranged on outside furnace body cooling system furnace wall decreases nearly 90% than traditional cooling system pipeline, and the quantity of furnace shell perforate also only has 2 ~ 5% of traditional process for cooling the number of openings, not only effectively reduce thermosteresis, and be conducive to the insulation of blast furnace furnace wall, thus revolutionize the present situation that high stove outer covering cannot carry out being incubated, inherently improve furnace wall heat radiation.
(4) the present invention is provided with belt fin and paraffin paper at the outer wall of superconduction ring-like heat exchange ring, therefore the carburization phenomena of the ring-like heat exchange ring of superconduction can be reduced, the charcoal infiltration of more than 75% can be stopped again, thus effectively reduce cooling duct ooze charcoal embrittlement, make improve more than twice its work-ing life.Meanwhile, due to the use of belt fin, blast furnace lining scour resistance of the present invention is made to improve more than 5 times than existing system.
(6) the present invention can utilize the heat producing steam in next life produced in blast furnace production process fully, and then while realizing energy-conserving and environment-protective, make blast furnace cooling residual heat be utilized effectively.Simultaneously, the power generation system that the present invention adopts, supporting utilizing waste heat for refrigeration unit and associated couplings method effectively raise residual heat generating efficiency, blast furnace water-cooling utilization rate of waste heat is brought up to about 90%, count traditional cooling tower energy consumption in, residual heat generating efficiency of the present invention is more than doubled, and improves the UTILIZATION OF VESIDUAL HEAT IN level of whole blast furnace ironmaking industry.
(7) the present invention is provided with the waste heat control treatment system of innovation in utilizing waste heat for refrigeration unit inside, can guarantee the steady running of whole utilizing waste heat for refrigeration unit, can guarantee that the utilization rate of waste heat of this utilizing waste heat for refrigeration unit reaches more than 90%.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Fig. 2 is ring-like pipeline system architecture schematic diagram of the present invention.
Fig. 3 is the local section structural representation shown in Fig. 2.
Fig. 4 is waste heat control treatment circuit system structural representation of the present invention.
Fig. 5 is biased adjustable current source electrical block diagram of the present invention.
Wherein, the Reference numeral title in accompanying drawing is respectively:
1-furnace body, the ring-like heat exchange ring of 2-superconduction, 31-upper conduit, 32-overflow pipe, 33-sleeve pipe, 4-semi-circular grooves, 5-high temperature without asbestos calcium silicate board with microporous, 6-softened water tank, 7-deoxygenator, 8-desuperheater, 9-steam manifold, 10-cast cured explosive body, 11-goes in ring fin, 12-power generation system, 13-drum, 14-utilizing waste heat for refrigeration unit, 15-condenser, 16-steam turbine, 17-blast furnace foundation pier water cooling tube, 18-steam water hybrid heater, 19-generator.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figures 1 to 3, furnace body 1 of the present invention is the same with traditional blast furnace, is divided into shaft, bosh, furnace bosh and stove seat four parts.The present invention along furnace body 1 sidewall layering circulating type be provided with the ring-like heat exchange ring 2 of more than one superconduction, namely the ring-like heat exchange ring 2 of these superconductions is arranged along the shaft of furnace body 1, bosh, furnace bosh and stove seat, and the sidewall surfaces of whole furnace body 1 is all covered.A circle often round furnace body 1 sidewall is one deck, and the centerline being positioned at the ring-like heat exchange ring 2 of all superconductions on same layer is all in same plane, be therefore just formed with the ring-like heat exchange ring 2 of superconduction of some layers from top to bottom along the sidewall surfaces of furnace body 1.In order to ensure remaining heat exchange effect, each superconduction ring-like heat exchange ring 2 is provided with a cast cured explosive body 10 formed by Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable, and the ring-like heat exchange ring 2 of each superconduction all forms an entirety with its cast cured explosive body 10.Correspondingly, the sidewall of furnace body 1 is also provided with the seam corresponding with each superconduction ring-like heat exchange ring 2, during installation, is lining with in the ring-like heat exchange ring 2 of each superconduction is all embedded in furnace body 1 sidewall by its cast cured explosive body 10.
Consider and will farthest reduce the engineering time and guarantee effective heat exchanger effectiveness, therefore described cast cured explosive body 10 can be realized by the mode of one-time cast-forming, and segmentation also can be adopted to divide the mode of ring precast assembly to realize.When adopting segmentation to divide ring precast assembly, standing seam is 80mm outside 60mm stove inside stove, and seam adopts Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable pour into a mould in stove thus form cast cured explosive body 10.Add 6mm aluminosilicate fiberboard in prefabricated side before cast and be bonded on the cast cured explosive body 10 that prefabricated side has been shaped with water glass mixing bonding chamotte.In addition, admixture carbon fibre is gone back in Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable between the surface of the cast cured explosive body 10 contacted with superconduction ring-like heat exchange ring 2 at the sidewall of furnace body 1, to make full use of hole that carbon fibre formed after manufacture to improve heat expansion of the present invention, shrinkage ability, for the life-span of blast furnace walls serves keying action.
During installation, the integrally-built height of this cast cured explosive body 10 will respectively extend 250 ± 25mm up and down for the height of the ring-like heat exchange ring 2 of superconduction; The composite structure that between contact surface and the horizontal plane place that is connected with other position of cast cured explosive body 10 is all formed with the aluminosilicate fiberboard (refractoriness is 1350 DEG C) that the polyvinyl chloride plate holder 3mm of 2 layers of 1.5mm is thick up and down of furnace body 1 sidewall seam and this cast cured explosive body 10 stitches and separates, the integral thickness of this composite structure seam is 6 ± 1mm, employing level is docked, the sealing of butt seam employing tape is tight, firm, is as the criterion to pour into a mould to vibrate not ooze slurry or dock de-seam.
The bonding surface of described cast cured explosive body 10 must be levelling with the magma of Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable, the composite structure seam layer described in this claim is spread before initial set, itself and mould material are all close to, it is then relevant with the differential expansion crackle that the cast cured explosive body 10 adopting once-cast to be shaped produces that this is close to quality, this differential expansion crackle can be formed after blast furnace opening, and be advisable to be no more than 1.5mm width, and should brush containing 5% potash water glass and 75%Al with when exceeding
2o
3high-alumina chamotte slurry squeegee.
And Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable be waste heat of the present invention exchange and utilization provide great effect, it is the mullite of 8%, diamond spar particle (particle diameter 8 ~ 15mm mainly AL of 65% primarily of weight percent
2o
3), the zirconium aluminium matter particle (particle diameter 5 ~ 10mm) of 1%, 2% steel fiber (the Q235 steel wire of the long 30mm of diameter 0.5mm), the luminite cement of 20%, long 10 ~ 25mm bast fibre silk 3Kg/m
3, and surplus is that clay powder and the High-Alumina chamotte powder being less than 5mm mix.Wherein, described bast fibre silk does not account for the weight percentage of Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable, and namely the component of this Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable is the mullite of 8%, diamond spar particle (particle diameter 8 ~ 15mm mainly AL of 65%
2o
3), the zirconium aluminium matter particle (particle diameter 5 ~ 10mm) of 1%, the steel fiber (the Q235 steel wire of the long 30mm of diameter 0.5mm) of 2%, the luminite cement of 20% and surplus be clay powder and the High-Alumina chamotte powder being less than 5mm, the bast fibre silk added then configures by the weight of whole Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable, and namely the Wear-resistant thermal shock-resistant of every cubic metre impervious charcoal elasticity refractory castable adds length 10 ~ 25mm bast fibre silk of 3Kg.
Because bast fibre silk can be burnt and form space in the middle of Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable puts into production process, simultaneously due to the ligation of steel fiber, therefore whippy structure is formed after making Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable thermal sintering, there is very strong thermal shock resistance, heat expansion and shrinkage can be absorbed, form comparatively large fracture after effectively overcoming cracked after easily there is thermal expansion repeatedly after traditional mould material puts into production use or shrinkage, effectively improve the life-span of blast furnace lining refractory materials.
In order to fully absorb the heat of the ring-like heat exchange ring 2 of superconduction, therefore on the sidewall of furnace body 1, be provided with all corresponding with the superconduction ring-like heat exchange ring 2 of the every layer ring-like tubing system of quantity and position, namely have which floor superconduction is ring-like heat exchange ring 2, just to there being which floor ring-like tubing system.As shown in Figure 3, every layer of ring-like tubing system is formed by sleeve pipe 33, upper conduit 31 and the overflow pipe 32 of some that arrange along furnace body 1 sidewall.
According to practical situation, this sleeve pipe 33 forms an entirety by two three-way pieces be made by PVC, PPR or metallic substance and a straight tube, and namely two threeways are separately fixed at the two ends of straight tube and its inside is connected.The central axis of sleeve pipe 33 and the centerline axis parallel of furnace body 1, the upper end of all sleeve pipes 33 is then connected in series and makes it form an annulus by upper conduit 32, the lower end of all sleeve pipes 33 is connected in series by all overflow pipes 33, also make it form an annulus, thus make each ring-like tubing system be the independently entirety be interconnected each other.The quantity of every layer of superconduction ring-like heat exchange ring 2 and position are all corresponding with the quantity of the sleeve pipe 33 in the belt tubing system corresponded and position, i.e. a ring-like heat exchange ring 2 of a superconduction just corresponding sleeve pipe 33.
The ring-like heat exchange ring 2 of superconduction is the parts of the present invention's core the most, and it is made into ring-type by soft steel, and be filled with therein by water, how, sodium or potassium, or the superconduction heat exchange medium that its arbitrary combination mixes.Superconduction heat exchange medium in order to ensure superconduction ring-like heat exchange ring 2 inside can carry out thermal energy exchange rapidly, and therefore the global shape of this superconduction ring-like heat exchange ring 2 preferentially makes rectangular shape.Meanwhile, the tube wall being embedded in the superconduction ring-like heat exchange ring 2 of cast cured explosive body 10 inside is also provided with the more than one belt fin 11 be made up of soft steel Q235.The thickness of this ring fin 11 is 20 ± 1mm, external diameter is 150 ± 10mm, its internal diameter 10mm larger than the external diameter of superconduction ring-like heat exchange ring 2, and weld with the two-sided full weld of superconduction ring-like heat exchange ring 2, welding quality then oozes charcoal with absorption, superconduction ring-like heat exchange ring 2 realizes superconduction heat exchange efficiency and work-ing life improves relevant.The external diameter of ring-like fin 11 and the distance of blast furnace internal surface are: shaft position 70 ± 20mm; furnace bosh position 100 ± 10mm; this distance is applicable to the blast furnace of various volume, and with blast furnace superconducting cooling system blast furnace internal surface form protectiveness slag crust and erosion resistibility relevant.
Due to the rectangular shape of superconduction ring-like heat exchange ring 2, and its pipeline only with ring fin 11 side be embedded in furnace body 1 by cast cured explosive body 10 sidewall in be lining with, therefore the ring-like heat exchange ring 2 of this superconduction also has the pipeline of side to be outside the outer sidewall being exposed at furnace body 1, this pipeline exposing side then will through sleeve pipe 33 corresponding thereto, thus make each superconduction ring-like heat exchange ring 2 all link together with described type tubing system.In order to ensure heat exchanger effectiveness, therefore the present invention also have employed full weld zero defect welding process weld in the part of passing through mutually of ring-like heat transfer tube 2 and sleeve pipe 33, thus make the ring-like heat exchange ring 2 of each superconduction all can be fixed on upper conduit 31 and overflow pipe 32, to form the one-piece construction shown in Fig. 3.Meanwhile, the belt face of each superconduction ring-like heat exchange ring 2 all must be vertical with the tangent line of upper conduit 31 or overflow pipe 32.
Cross-section structure when the ring-like heat exchange ring 2 of superconduction passes through mutually with conduit 33 as shown in Figure 3, the heat energy absorbed in order to ensure superconduction heat exchange medium in the ring-like heat exchange ring 2 of superconduction with effectively can carry out heat exchange with the working medium flowed through in conduit 33 in time, therefore on the inner-walls of duct of conduit 33, be also provided with some the semi-circular grooves be arranged in parallel 4.
Ring-like for superconduction heat exchange ring 2 is divided into preheating section, evaporator section, cryogenic overheating section and hyperthermia and superheating section four part by the present invention, in order to improve heat interchanging area and heat transfer effect, above-mentioned preheating section, evaporator section, cryogenic overheating section and hyperthermia and superheating Duan Jun have most of structure to be embedded in the sidewall of furnace body 1, the part being positioned at furnace body 1 sidewall outside is then communicated with by a conduit, to ensure that water coolant is sent into after conduit from service pump, can smooth flow in steam utilization apparatus bottom.
For the ease of fixing ring-like tubing system, therefore on the sidewall of furnace body 1, just establish a place and last furnace shell to be welded and fixed triangular supports every 4500mm, establish place's trilateral travel(l)ing rest to support upper conduit 31 every 900mm.On sleeve pipe 33, be also provided with a level pipe simultaneously, and the internal diameter of this level pipe, external diameter, wall thickness and length are relevant with the blast furnace horizontal temperature field at place with the volume of blast furnace, it is outer and be connected with the two-sided full weld in intersection, furnace wall that this level pipe passes blast furnace furnace wall, and with Wear-resistant thermal shock-resistant impervious charcoal elasticity refractory castable 10 by the corresponding fixing blast furnace lining refractory masses of the cast such as pipeline, support connected, form an one-piece construction.Simultaneously, at the steel structure contacted with cast cured explosive body 10, accessory, also coated outward (canoe is coated, cement with tape afterwards) 3 ~ 5 layers have 0.2mm paraffin paper, this coated thickness degree of uniformity and quality all improve relevant to heat exchange efficiency of the present invention and bulk life time.Meanwhile, high temperature is provided with without asbestos calcium silicate board with microporous 5 at the furnace bosh of furnace body 1 and the furnace wall iron-clad internal surface at bosh position.
In order to reach the order ground of waste heat recovery recycling, the break traditions constraint of technology of the present invention is combined with power generation system 12 and steam utilization apparatus first, thus by traditional blast furnace cooling system waste heat can not with power generation system and steam utilization apparatus with the use of technical problem become reality.
In order to realize this object, present invention employs unique steam utilization apparatus and power generation system 12, as shown in Figure 1, this steam utilization apparatus comprises deoxygenator 7, desuperheater 8, drum 13, softened water tank 6 and steam manifold 9 to its structure.One end of described drum 13 is connected with the upper conduit 31 of each layer or overflow pipe 32, its the other end is then connected with desuperheater 8 with deoxygenator 7 in turn after arm, one end of softened water tank 6 is connected with power generation system 12, and the other end is then connected with the overflow pipe 32 in the ring-like tubing system at furnace body 1 shaft place.Between the overflow pipe 32 that described steam manifold 9 is connected to furnace body 1 furnace bosh place and desuperheater 8, and desuperheater 8 is also connected with the upper conduit 31 at stove seat place with the upper conduit 31 at furnace body 1 shaft place respectively by arm.
Power generation system 12 then comprises utilizing waste heat for refrigeration unit 14, condenser 15, steam turbine 16, blast furnace foundation pier water cooling tube 17, steam water hybrid heater 18, generator 19 and penetrate vapour supercharging blower.Wherein, steam turbine 16 is connected with the upper conduit 31 of condenser 15 with furnace body 1 stove seat place, utilizing waste heat for refrigeration unit 14 is then for absorbing and reusing the waste heat that this condenser 15 discharges, steam water hybrid heater 18 is connected with this utilizing waste heat for refrigeration unit 14, and blast furnace foundation pier water cooling tube 17 is then connected between utilizing waste heat for refrigeration unit 14 and steam water hybrid heater 18.
Described vapour supercharging blower of penetrating is increase the device that the running efficiency of steam turbine 16 and moment of torsion increase, and it is connected with the cooling water pipeline of utilizing waste heat for refrigeration unit 14 and directly acts on the spinner blade of steam turbine 16, just as current turbosupercharged engine.Steam water hybrid heater 18 is then connected with drum 13 through arm.Describedly penetrate the air-flow that vapour supercharging blower sprays and then come from this utilizing waste heat for refrigeration unit 14 for the low-temperature water heating after heat exchange, this is penetrated vapour supercharging blower and this low-temperature water heating sharply can be compressed, and form air-flow and spray to the spinner blade of steam turbine 16, and then pushing turbine 16 accelerated service.
In steam utilization apparatus of the present invention, power generation system 12 and ring-like tubing system, the working medium of all participation blast furnace coolings is soft water, namely all softened by softened water tank 6, to guarantee that each tubing system inside can not produce incrustation scale, thus affect the cooling performance of blast furnace.Wherein, in steam utilization apparatus, the soft water inlet temperature of softened water tank 6 becomes the target value that control engine exhaust-powered refrigerator 14 produces cold water, and adapts with the vacuum tightness of condenser 15, and keeps constant.The temperature sensor being arranged on cast cured explosive body 10 inside is then mainly used in the temperature gathering its internal temperature and distance 100mm, 250mm and 350mm place, furnace body 1 furnace wall, whole system is using this temperature as target control value, thus control the steam parameter of steam turbine 16, and guarantee that furnace body 1 side wall temperatures is not higher than 50 DEG C.
For guaranteeing the efficiency of engine exhaust-powered refrigerator 14, the present invention is provided with by kenotron rectifier U, regulated transformer circuit, logic switching circuit, voltage stabilizing parallel control circuit therein and is serially connected in the waste heat control treatment system that the biased adjustable current source between regulated transformer circuit and voltage stabilizing parallel control circuit forms, and its structure as shown in Figure 4.During connection, between the cathode output end that this regulated transformer circuit is directly serially connected in kenotron rectifier U and cathode output end, logic switching circuit is then connected with regulated transformer circuit with the cathode output end of kenotron rectifier U respectively, and voltage stabilizing parallel control circuit is then connected with logic switching circuit.
Wherein, regulated transformer circuit is made up of power amplifier P1, transformer T, resistance R3, resistance R4, resistance R5, diode D1, Zener diode D2, Zener diode D3, diode D4, diode D5, polar capacitor C3, electric capacity C5, electric capacity C6, electric capacity C7 and inductance L 4.Wherein, transformer T by the primary coil L1 being arranged on its former limit, and is arranged on the secondary coil L2 of its secondary and secondary coil L3 and forms.
During connection, one end of resistance R3 is connected with the in-phase end of power amplifier P1, its other end in turn after resistance R4 the Same Name of Ends of the primary coil L1 of transformer T be connected; The P pole of diode D1 is connected with the output terminal of power amplifier P1, and its N pole is connected with the non-same polarity of the primary coil L1 of transformer T after resistance R5.Meanwhile, the P pole of Zener diode D2 is connected with the cathode output end of kenotron rectifier U, and its N pole is connected with the tie point of resistance R4 with resistance R3; The P pole of Zener diode D3 is connected with the cathode output end of kenotron rectifier U, and its N pole is connected with the N pole of diode D1.
The positive pole of polar capacitor C3 is connected with the in-phase end of power amplifier P1, and its negative pole is connected with the output terminal of power amplifier P1; The P pole of diode D4 is connected with the Same Name of Ends of the secondary coil L2 of transformer T, and its N pole is connected with the non-same polarity of the secondary coil L2 of transformer T in turn after inductance L 4, electric capacity C6.The positive pole of electric capacity C5 is then connected with the N pole of diode D4, and its negative pole is connected with the non-same polarity of the secondary coil L2 of transformer T.
The P pole of diode D5 is connected with the non-same polarity of the secondary coil L3 of transformer T, and its N pole is connected with the Same Name of Ends of the secondary coil L3 of transformer T after electric capacity C7.Meanwhile, the in-phase end of described power amplifier P1 is connected with the cathode output end of kenotron rectifier U, and its end of oppisite phase is then connected with the cathode output end of kenotron rectifier U.
Wherein, the positive pole of electric capacity C6 and negative pole directly draw formation first output end of pressure-stabilizing, and as the signal control end of desuperheater 8; The positive pole of electric capacity C7 and negative pole directly draw formation second output end of pressure-stabilizing, and as the signal control end of steam water hybrid heater 18.
Described logic switching circuit by variable resistor R1, resistance R2, and field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3 and field effect transistor MOS4 composition.During connection, one end of variable resistor R1 is connected with the cathode output end of kenotron rectifier U, its other end is then connected with the grid of field effect transistor MOS1; One end of resistance R2 is connected with the cathode output end of kenotron rectifier U, its other end is connected with the grid of field effect transistor MOS2; The grid of field effect transistor MOS3 is connected with the source electrode of field effect transistor MOS1, it drains then respectively with the drain electrode of field effect transistor MOS2 and the drain electrode of field effect transistor MOS4 is connected, its source electrode external+12V voltage together with the source electrode of field effect transistor MOS1; The grid of field effect transistor MOS4 is connected with the source electrode of field effect transistor MOS2, its source ground.
Described voltage stabilizing parallel control circuit is by three terminal regulator W1, three terminal regulator W2, field effect transistor MOS5, triode Q1, polar capacitor C1, polar capacitor C2, polar capacitor C4, polar capacitor C8, polar capacitor C9, polar capacitor C10, resistance R6, resistance R7, resistance R8, resistance R9, and inductance L 5 and inductance L 6 form.
During connection, the positive pole of polar capacitor C1 is connected with the end of oppisite phase of power amplifier P1, and its negative pole is connected with the base stage of triode Q1 after inductance L 6 through inductance L 5 in turn; The positive pole of polar capacitor C2 is connected with the output terminal of power amplifier P1, and its negative pole is connected with the tie point of inductance L 5 with inductance L 6; One end of resistance R6 is connected with the base stage of triode Q1, and its other end is ground connection after resistance R8; One end of resistance R7 is connected with the Q pin of three terminal regulator W2, and its other end is connected with the grid of field effect transistor MOS5; One end of resistance R9 is connected with the source electrode of field effect transistor MOS5, its other end ground connection; The positive pole of polar capacitor C8 is connected with the emtting electrode of triode Q1, and its negative pole is connected with the source electrode of field effect transistor MOS5 after polar capacitor C9; The positive pole of polar capacitor C10 is connected with the collector electrode of triode Q1, and its negative pole is connected with the negative pole of polar capacitor C8; The positive pole of polar capacitor C4 is connected with the tie point of resistance R8 with resistance R6, and its negative pole is connected with the source electrode of field effect transistor MOS5.The positive pole of polar capacitor C10 and negative pole are then as the signal voltage control end penetrating vapour supercharging blower.
Simultaneously, the S end of described three terminal regulator W1 is all connected with the negative pole of polar capacitor C2 with the S end of three terminal regulator W2, the R end of three terminal regulator W1 is connected with the source electrode of field effect transistor MOS3, and the R end of three terminal regulator W2 is then connected with the source electrode of field effect transistor MOS4; The Q end of described three terminal regulator W1 is then connected with the tie point of resistance R8 with resistance R6, and the drain electrode of field effect transistor MOS5 is then connected with the end of oppisite phase of power amplifier P1.
As shown in Figure 5, namely it is by power amplifier P2 for the circuit structure of described biased adjustable current source, power amplifier P3, power amplifier P4, triode Q2, adjustable resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, and Zener diode D6 forms.During connection, one end of resistance R13 is connected with the output terminal of power amplifier P2, and its other end is connected with the end of oppisite phase of power amplifier P3; The N pole of described Zener diode D6 is connected with the output terminal of power amplifier P2, and its P pole is connected with the output terminal of power amplifier P4; And one end of adjustable resistance R12 is connected with the in-phase end of power amplifier P2, its other end is connected with the output terminal of power amplifier P4, and its regulation and control end is then connected with the in-phase end of power amplifier P4.
Described resistance R18 is then serially connected between the output terminal of power amplifier P2 and the emtting electrode of triode Q2, between the end of oppisite phase that resistance R14 is then serially connected in power amplifier P3 and output terminal.And one end of resistance R16 is connected with the in-phase end of power amplifier P3, its other end is connected with the output terminal of power amplifier P3 after resistance R15.One end of resistance R17 is connected with the in-phase end of power amplifier P3, and its other end is then connected with the collector electrode of triode Q2.
Meanwhile, the end of oppisite phase of described power amplifier P4 is connected with the emtting electrode of triode Q2, and its output terminal is then connected with the base stage of triode Q2; The grounded collector of described triode Q2; The in-phase end of described power amplifier P2 is as the voltage input end Vin of this biased adjustable current source, and it is connected with the cathode output end of kenotron rectifier U; The tie point of resistance R15 and resistance R16 is then as the output end vo ut of this biased adjustable current source, and it is connected with the base stage of triode Q1.
During operation, working medium of the present invention is liquid on the top of whole recovery system, bottom is steam state, and the pressure that this liquid liquid level produces keeps heat exchange to balance with native system and the cooling intensity needed for blast furnace ironmaking adaptively, and to reduction blast furnace ironmaking coke ratio, reduce cooling water consumption and reduce the power of water circulating pump relevant.In order to ensure effect, the present invention is less than 450m at furnace body 1 volume
3time, the shell in furnace body 1 furnace wall adopts Surgery therapy, and insulation layer surface temperature is not higher than 40 DEG C; And when furnace body 1 volume is greater than 450m
3time, because the shaft height of furnace body 1 increases, therefore effectively circulate in order to ensure steam-energy, the present invention also needs to increase more than one steam circulation, each steam circulation forms by superconduction ring-like heat exchange ring 2, upper conduit 31, overflow pipe 32, sleeve pipe 33 and belt fin 11, and the height of each steam circulation meets 4 times of smallest common multiple layers that can be set to superconduction ring-like heat exchange ring 2 number of plies, in the iron-clad of furnace body 1 furnace wall, paste thermal conductivity lower than 0.006W/ with heat-resisting building adhesive simultaneously
(m.k), remnant compressive strengths 0.4MPa, maximum operating temperature be that the form of the high temperature asbestos-free calcium silicate board of 1000 DEG C carries out adiabatic heat-insulation, insulation layer thickness is 50mm thermal insulation layer, to ensure overall energy-saving effect, and further reduces coke ratio in blast furnace iron-making.
After connecting in this way, the heat energy produced when the ring-like heat exchange ring 2 of superconduction be arranged on furnace body 1 sidewall just can draw blast fumance at any time, and carry out heat exchange by ring-like tubing system and drum 13 with the water coolant of outside, the water coolant of final high temperature, making full use of its heat energy by above-mentioned steam utilization apparatus and power generation system 12, carries out energy-conservation object.
As mentioned above, just the present invention can be realized preferably.
Claims (5)
1. the blast furnace superconducting cooling residual heat power generation system based on biased adjustable current source, primarily of furnace body (1), power generation system (12), steam utilization apparatus, along the ring-like heat exchange ring (2) of more than one superconduction that the sidewall layering circulating type of furnace body (1) is arranged, at the upper cast cured explosive body (10) arranged of the ring-like heat exchange ring (2) of each superconduction, for being connected in series the upper conduit (31) of the upper cycling mouth of the ring-like heat exchange ring (2) of each superconduction, and form for the overflow pipe (32) of the lower circulation port being connected in series each superconduction ring-like heat exchange ring (2), the ring-like heat exchange ring (2) of described each superconduction is all connected with steam utilization apparatus by pipeline, steam utilization apparatus is then connected with power generation system (12) by pipeline, it is characterized in that, described power generation system (12) is by generator (19), the steam turbine (16) be connected with steam utilization apparatus with the ring-like heat exchange ring (2) of the superconduction at furnace body (1) stove seat place and condenser (15), for absorb and reuse this condenser (15) discharge the utilizing waste heat for refrigeration unit (14) of waste heat, the steam water hybrid heater (18) be connected with this utilizing waste heat for refrigeration unit (14), be connected to the blast furnace foundation pier water cooling tube (17) between utilizing waste heat for refrigeration unit (14) and steam water hybrid heater (18), be connected with utilizing waste heat for refrigeration unit (14) and feed back and penetrate vapour supercharging blower in steam turbine (16), and be arranged on the inner waste heat control treatment system composition of utilizing waste heat for refrigeration unit (14), described waste heat control treatment system is by kenotron rectifier U, be serially connected in the regulated transformer circuit between the cathode output end of kenotron rectifier U and cathode output end, the logic switching circuit be connected with regulated transformer circuit with the cathode output end of kenotron rectifier U respectively, the voltage stabilizing parallel control circuit be connected with logic switching circuit, and the biased adjustable current source be serially connected between regulated transformer circuit and voltage stabilizing parallel control circuit forms, described biased adjustable current source is by power amplifier P2, power amplifier P3, power amplifier P4, triode Q2, one end is connected with the output terminal of power amplifier P2, the resistance R13 that the other end is connected with the end of oppisite phase of power amplifier P3, N pole is connected with the output terminal of power amplifier P2, the Zener diode D6 that P pole is connected with the output terminal of power amplifier P4, one end is connected with the in-phase end of power amplifier P2, the other end is connected with the output terminal of power amplifier P4, the adjustable resistance R12 be then connected with the in-phase end of power amplifier P4 is held in its regulation and control, be serially connected in the resistance R18 between the output terminal of power amplifier P2 and the emtting electrode of triode Q2, be serially connected in the resistance R14 between the end of oppisite phase of power amplifier P3 and output terminal, one end is connected with the in-phase end of power amplifier P3, the resistance R16 that the other end is connected with the output terminal of power amplifier P3 after resistance R15, and one end is connected with the in-phase end of power amplifier P3, the resistance R17 that the other end is connected with the collector electrode of triode Q2 forms, the end of oppisite phase of described power amplifier P4 is connected with the emtting electrode of triode Q2, and its output terminal is then connected with the base stage of triode Q2, the grounded collector of described triode Q2, the in-phase end of described power amplifier P2 is then connected with the cathode output end of kenotron rectifier U, and resistance R15 is then connected with voltage stabilizing parallel control circuit with the tie point of resistance R16.
2. a kind of blast furnace superconducting cooling residual heat power generation system based on biased adjustable current source according to claim 1, it is characterized in that, described steam utilization apparatus is connected with upper conduit (31) by one end, the drum (13) that the other end is connected with desuperheater (8) with deoxygenator (7) in turn through arm, the softened water tank (6) be connected with power generation system (12), and the steam manifold (9) be connected between the overflow pipe (32) at furnace body (1) furnace bosh place and desuperheater (8) forms, described desuperheater (8) is also connected with the upper conduit (31) at stove seat place with furnace body (1) furnace roof respectively by arm, power generation system (12) is also connected with drum (13) through arm.
3. a kind of blast furnace superconducting cooling residual heat power generation system based on biased adjustable current source according to claim 2, it is characterized in that, described regulated transformer circuit is by power amplifier P1, transformer T, one end is connected with the in-phase end of power amplifier P1, the other end resistance R3 that the Same Name of Ends of the primary coil L1 of transformer T is connected after resistance R4 in turn, P pole is connected with the output terminal of power amplifier P1, the diode D1 that N pole is connected with the non-same polarity of the primary coil L1 of transformer T after resistance R5, P pole is connected with the cathode output end of kenotron rectifier U, the Zener diode D2 that N pole is connected with the tie point of resistance R4 with resistance R3, P pole is connected with the cathode output end of kenotron rectifier U, the Zener diode D3 that N pole is connected with the N pole of diode D1, positive pole is connected with the in-phase end of power amplifier P1, the polar capacitor C3 that negative pole is connected with the output terminal of power amplifier P1, P pole is connected with the Same Name of Ends of the secondary coil L2 of transformer T, N pole is in turn through inductance L 4, the diode D4 be connected with the non-same polarity of the secondary coil L2 of transformer T after electric capacity C6, positive pole is connected with the N pole of diode D4, the electric capacity C5 that negative pole is connected with the non-same polarity of the secondary coil L2 of transformer T, and P pole is connected with the non-same polarity of the secondary coil L3 of transformer T, the diode D5 that N pole is connected with the Same Name of Ends of the secondary coil L3 of transformer T after electric capacity C7 forms, the in-phase end of described power amplifier P1 is connected with the cathode output end of kenotron rectifier U, and its end of oppisite phase is then connected with the cathode output end of kenotron rectifier U.
4. a kind of blast furnace superconducting cooling residual heat power generation system based on biased adjustable current source according to claim 3, it is characterized in that, described logic switching circuit is by variable resistor R1, resistance R2, and field effect transistor MOS1, field effect transistor MOS2, field effect transistor MOS3 and field effect transistor MOS4 composition; One end of described variable resistor R1 is connected with the cathode output end of kenotron rectifier U, its other end is then connected with the grid of field effect transistor MOS1; One end of resistance R2 is connected with the cathode output end of kenotron rectifier U, its other end is connected with the grid of field effect transistor MOS2; The grid of field effect transistor MOS3 is connected with the source electrode of field effect transistor MOS1, it drains then respectively with the drain electrode of field effect transistor MOS2 and the drain electrode of field effect transistor MOS4 is connected, its source electrode external+12V voltage together with the source electrode of field effect transistor MOS1; The grid of field effect transistor MOS4 is connected with the source electrode of field effect transistor MOS2, its source ground.
5. a kind of blast furnace superconducting cooling residual heat power generation system based on biased adjustable current source according to claim 4, it is characterized in that, described voltage stabilizing parallel control circuit is by three terminal regulator W1, three terminal regulator W2, field effect transistor MOS5, triode Q1, positive pole is connected with the end of oppisite phase of power amplifier P1, negative pole is in turn through polar capacitor C1 that inductance L 5 is connected with the base stage of triode Q1 after inductance L 6, positive pole is connected with the output terminal of power amplifier P1, the polar capacitor C2 that negative pole is connected with the tie point of inductance L 6 with inductance L 5, one end is connected with the base stage of triode Q1, the resistance R6 of the other end ground connection after resistance R8, one end is connected with the Q pin of three terminal regulator W2, the resistance R7 that the other end is connected with the grid of field effect transistor MOS5, one end is connected with the source electrode of field effect transistor MOS5, the resistance R9 of the other end ground connection, positive pole is connected with the emtting electrode of triode Q1, the polar capacitor C8 that negative pole is connected with the source electrode of field effect transistor MOS5 after polar capacitor C9, positive pole is connected with the collector electrode of triode Q1, the polar capacitor C10 that negative pole is connected with the negative pole of polar capacitor C8, and positive pole is connected with the tie point of resistance R8 with resistance R6, the polar capacitor C4 that negative pole is connected with the source electrode of field effect transistor MOS5 forms, the S end of described three terminal regulator W1 is all connected with the negative pole of polar capacitor C2 with the S end of three terminal regulator W2, the R end of three terminal regulator W1 is connected with the source electrode of field effect transistor MOS3, and the R end of three terminal regulator W2 is then connected with the source electrode of field effect transistor MOS4, the Q end of described three terminal regulator W1 is then connected with the tie point of resistance R8 with resistance R6, and the drain electrode of field effect transistor MOS5 is connected with the end of oppisite phase of power amplifier P1, described resistance R15 is then connected with the base stage of triode Q1 with the tie point of resistance R16.
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