CN105588449A - Calcium carbide waste heat recycling method and recycling system - Google Patents
Calcium carbide waste heat recycling method and recycling system Download PDFInfo
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- CN105588449A CN105588449A CN201510206082.XA CN201510206082A CN105588449A CN 105588449 A CN105588449 A CN 105588449A CN 201510206082 A CN201510206082 A CN 201510206082A CN 105588449 A CN105588449 A CN 105588449A
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- calcium carbide
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- cooling wall
- waste heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a calcium carbide waste heat recycling method. Calcium carbide is discharged from a calcium carbide furnace, the temperature of the calcium carbide can reach about 2200 DEG C, and the calcium carbide carries high thermal energy. According to the method, calcium carbide waste heat is recycled in radiation and convective heat transfer modes. A calcium carbide discharge and collection system, a closed tunnel, a calcium carbide feeding system and a water-cooling wall system are involved. After calcium carbide materials are discharged out of the furnace, the calcium carbide materials are continuously conveyed through the calcium carbide discharge and collection system and fed to the calcium carbide feeding system, the whole calcium carbide discharge and collection system and the calcium carbide feeding system are located in the closed tunnel, and the water-cooling wall system is disposed in the tunnel. Heat of the calcium carbide materials is recycled through water circulation, and the heat is converted into steam energy through a water-cooling wall and cooling media in a pipe of the water-cooling wall to be used for power generation or technologies. In the calcium carbide cooling process, solidification of a calcium carbide boiler ingot can be avoided. Meanwhile, a waste heat collecting method is simple, process equipment saves energy and is simple, investment is low, the energy-saving effect is high, and produced steam can be used for power generation or other uses.
Description
Technical field
The present invention relates to a kind of calcium carbide Waste Heat Recovery and utilize method and calcium carbide waste heat recycling system, be applicable to electricityThe cooling used heat utilization of calcium carbide material of stone industry, belongs to energy-conserving and emission-cutting technology field.
Background technology
Electric power and raw material of wood-charcoal occupy very large proportion in the cost of calcium carbide product, are about 70%, 2000～2010 years,Domestic calcium carbide production capacity rises to 2,250 ten thousand t/a from 4,800,000 t/a, and output rises to 1650 from 3,400,000 t/aTen thousand t/a, since " 12 ", various places are that the calcium carbide project of large-scale chlor-alkali matched with devices starts in a large number, byIn the end of the year 2012, domestic calcium carbide enterprise has 388, and production capacity reaches 3,230 ten thousand t/a, and output brings up to 2000Ten thousand t/a, closed type calcium carbide furnace production capacity is 1,860 ten thousand t/a, in " 13 " period, continues to carry out overall adjustment and controlMeasure, strives that " 13 " end is controlled at 5,000 ten thousand t/a by calcium carbide production capacity, the ratio of closed type calcium carbide furnaceWeigh 100%, realizing product needs in a basic balance. Calcium carbide technical process power consumption 1100kg/t mark coal, 3400KwTime electricity, 2200 DEG C of calcium carbides of coming out of the stove of closed type calcium carbide furnace contain very high heat, can account for 21% of comprehensive energy consumption,The heat that is the cooling waste of calcium carbide per ton is equivalent to 231kg/t mark coal, and " 13 " end is by the control of calcium carbide production capacityAt 5,000 ten thousand t/a, the used heat of waste will reach 1,155 hundred million t/a mark coals, also not be applied at present engineeringThe useless heat utilization method of actual calcium carbide and practical technique.
The patent of current calcium carbide used heat utilization has following: the acetylene stones sensible heat electricity generation system based on furnace of calcium carbide andImplementation method (application number 201410238546.0), this patent provides around the furnace of calcium carbide annular heat exchange of a weekSystem, heat exchange mode adopts heat exchanger, is a kind of heat conducting heat energy utilization mode, and efficiency is lower, forThe heat exchanger of 2200 DEG C of high temperature, cannot carry out engineering application with current material; " acetylene stones sensible heat is collected in patent applicationSystem " (application number 2014102333521), this acetylene stones sensible heat gathering system comprises carbide liquid collection storage device,Collect with carbide liquid the high temperature resistant heat insulation plate that storage device open top matches, one end and carbide liquid are collected and are storedDevice is connected, the other end is connected with the superconduction heat exchange device of evaporimeter, is positioned at evaporimeter top, for discharging vapourThe outlet of aqueous mixtures, the cavity that described carbide liquid is collected storage device by inwall and and inwall between exist space alsoThe outer wall that forms hermetically-sealed construction forms, and in the inside and outside wall space of this carbide liquid collection storage device, is furnished with seamless steelPipe, seamless steel pipe inside is filled with heat-conducting medium, and this patent is also a kind of heat conducting heat energy utilization mode; OnePlant furnace of calcium carbide acetylene stones sensible heat reclaimer and recovery method (application number 201410040367.6) and mainly contain calcium carbideChute, smoking cover, hot blast tunnel kiln, transport track, high-temperature cyclone dust extractor, waste heat boiler, bag-type dustingDevice, high temperature draught fan and automation control system, this patent is also a kind of heat energy utilization mode of thermal convection current, rightThe thermal efficiency that spreads is lower, and has increased the equipment such as dedusting and problem; A kind of acetylene stones sensible heat heat collector (applicationNumber 201420344707.X), comprise an airtight heat-collecting box, heat-collecting box comprises to be located at ground bottom surface, to establishIn the two side of the left and right sides, bottom surface and be located at the ceiling on top, two side, the common shape of bottom surface, sidewall and ceilingBecome the receiving space for accommodating calcium carbide pot car, bottom surface is for being located at ground heat-insulation layer, and two side is respectively oneInsulated wall, ceiling comprises steel cylinder, is filled at the phase change heat storage material in steel cylinder and is coated on steel cylinder outer surface of cupular partHeat-insulation layer, the entrance one end in heat-collecting box on steel cylinder is provided with air inlet, and is provided with in outlet one end of heat-collecting boxAir outlet, air inlet is used for flowing into cold air. This acetylene stones sensible heat heat collector, the heat of the calcium carbide on calcium carbide pot carAmount conducts on phase change heat storage material by steel cylinder, and the cold airflow being flowed into by air intake vent is via phase change heat storage materialIn the process that gap is flow through, be heated to be thermal current, this thermal current is flowed out to be sent to by air outlet needs heat energyEquipment is recycled, and this patent can only reclaim used heat in calcium carbide pot bottom, passes by hot conduction and convection modeHeat, efficiency is lower, and in addition, calcium carbide pot center heat and edge are inhomogeneous, cause the calcium carbide pot center heat cannotUtilize; A kind of melting calcium carbide electricity generation system (application number 201420550583.0), its energy conversion comprisesHot-blast stove (21), waste heat boiler (22) and circulating fan (23); Close one of the gas-tight silo that packs on hot-blast stoveEnd offers circulated air outlet (211), offers circulated air entrance (212) away from the one end that packs gas-tight silo into; HeatWind furnace is exported with waste heat boiler and is conducted by circulated air, is conducted by circulated air entrance and circulating fan; More thanHeat boiler and circulating fan are conducted by ventilation shaft (25); Patents or application also comprise a kind of calcium carbideStove acetylene stones sensible heat reclaimer (CN201410040368.0), a kind of furnace of calcium carbide acetylene stones sensible heat retracting device(CN201420053876.8), a kind of calcium carbide sensible heat recycling device (CN201120489712.6), oneCalcium carbide sensible heat recovery system (CN201120209958.3), above patent or application are all to tie mutually with existing calcium carbide potThe convection heat transfer' heat-transfer by convection mode of closing is conducted heat, and all can not eliminate the existence that combines with existing calcium carbide pot, storehouse, particle techniqueTechnical problem, be difficult to realize enough through engineering approaches, easily with the docking of existing apparatus.
Summary of the invention
The problem existing for solving prior art, the invention provides a kind of calcium carbide Waste Heat Recovery and utilizes method, the partyMethod, in calcium carbide cooling procedure, can prevent that calcium carbide stone roller from solidifying, and has avoided calcium carbide pot stone roller to solidify the Crushing Problem of bulk,Meanwhile, used heat collection method is succinct, and Process Equipment is energy-conservation, simple, invests lowly, and energy-saving effect is the highest, and institute producesSteam can generate electricity and also can do other application.
Calcium carbide Waste Heat Recovery provided by the present invention is utilized method, it is characterized in that: in sealing tunnel, from electricityStone furnace discharge mouth is collected after calcium carbide, and calcium carbide is delivered to calcium carbide feed system continuously, forms continuous conveying, calcium carbideTransfer heat to and be coated on outside described calcium carbide feed system by radiation and convection heat transfer' heat-transfer by convection mode at course of conveyingThe heat transfer protection tube of portion, passes to the water-cooling wall system that is arranged on described heat transfer protection tube periphery through heat transfer protection tubeSystem. In tunnel, carry calcium carbide material, avoid dangerous calcium carbide dust contaminated environment; Complete in calcium carbide course of conveyingBecome calcium carbide heat collection, having saved calcium carbide can cooling storehouse and its cooling needed equipment, has saved occupation of land;The present invention directly utilizes heat radiation and thermal convection current that calcium carbide used heat is passed to water screen system, avoids adopting routine sideThe mode to calcium carbide forced ventilation heat absorption in method, has avoided energy consumption and the hot blast after heat absorption has been carried out to dedusting etc. and locateReason. Discontinuous during due to calcium carbide production, collect calcium carbide by calcium carbide discharging gathering system, form continuous conveying.
According to the height of calcium carbide temperature, described calcium carbide feed system is divided into high temperature section, middle-temperature section and low-temperature zone, heightIt is that to adopt heat radiation heated convection, low-temperature zone to adopt thermal convection current be main biography for main, middle-temperature section that temperature section adopts a heat radiationHot mode. The place near apart from furnace of calcium carbide discharging opening, calcium carbide heat is high, belongs to high temperature section, taking heat radiation as main,Along with distributing of heat, enter successively middle-temperature section and low-temperature zone, adopt respectively heat radiation heated convection, low-temperature zoneAdopting thermal convection current is main heat transfer type.
For avoiding being frozen into piece in calcium carbide cooling procedure, in course of conveying, calcium carbide is in described calcium carbide feed systemConstantly be stirred and stir. Constantly stir and stir conveying, can prevent that calcium carbide from solidifying, avoided follow-up calcium carbide to solidify greatlyThe Crushing Problem of piece, has reduced operation danger and the cost of subsequent handling; In addition, stir stirring calcium carbide, makeObtain the heat of calcium carbide by comprehensive utilization, calcium carbide is unlikely to pile up in calcium carbide feed system and causes in centerCalcium carbide heat cannot utilize.
Preferably, at high, middle-temperature section, the circulating cooling medium of described water screen system adopts forced circulation mode;In low-temperature zone, the circulating cooling medium of described water screen system adopts natural circulation mode; Described water screen systemSend described calcium carbide feed system high temperature section back to the saturated vapor producing after calcium carbide heat exchange and be heated as superheated steam,Superheated steam is sent to acting or is made other techniques and uses.
In low-temperature zone, described water screen system comprises water-cooling wall, and the two ends up and down of described water-cooling wall arrange respectively waterLeng Bi top carbonated drink concetrated pipe, water-cooling wall bottom water concetrated pipe, described water-cooling wall top carbonated drink concetrated pipe, water-cooledWall bottom water concetrated pipe is connected with drum respectively; Water in described drum enters water-cooling wall bottom water from drum bottomConcetrated pipe, and after the water-cooling wall of flowing through, water-cooling wall top carbonated drink concetrated pipe, enter and in drum, complete once circulation, andIn drum, carry out carbonated drink separation, the steam after separation can be used for generating or does other application. High temperature section, inTemperature section and low-temperature zone, can adopt natural circulation mode, and the water in drum enters water-cooling wall from drum bottomBottom water concetrated pipe, and enter in drum and complete once and follow after the water-cooling wall of flowing through, water-cooling wall top carbonated drink concetrated pipeRing. But at high, middle-temperature section, because calcium carbide temperature is very high, adopt natural circulation mode to be unfavorable for Rapid Thermal exchange,Therefore, at high, middle-temperature section, described water screen system comprises water-cooling wall, and the two ends up and down of described water-cooling wall respectivelyWater-cooling wall top carbonated drink concetrated pipe, water-cooling wall bottom water concetrated pipe are set, described water-cooling wall top carbonated drink concetrated pipeBe connected with drum, this drum is also connected with described water-cooling wall bottom water concetrated pipe by pump; Water in described drumAfter pump pressurization, enter water-cooling wall bottom water concetrated pipe, and after the water-cooling wall of flowing through, water-cooling wall top carbonated drink concetrated pipeEnter in drum and complete once and circulate, and in drum, carry out carbonated drink separation.
Evaporimeter can also be set in drum, and circulating cooling medium does not make water, and use heat conduction wet goods otherMedium, conduction oil enters water-cooling wall in drum, in water-cooling wall, gets back in drum, in evaporimeter after heat exchangeWater carry out heat exchange, produce high steam drive acting, the use of exhaust steam technique.
The present invention also provides a kind of calcium carbide waste heat recycling system, comprise sealing tunnel, calcium carbide feed system andWater screen system; Described calcium carbide feed system is arranged in described tunnel, and its outside is coated with heat transfer protection tube;Described calcium carbide feed system entrance point is provided with calcium carbide discharging gathering system, this calcium carbide discharging gathering system and calcium carbideFurnace discharge mouth connects, and described water screen system is arranged on described heat transfer protection tube periphery. Because calcium carbide discharging does not connectContinuous, the charging aperture of calcium carbide discharging gathering system, discharging opening connect respectively furnace of calcium carbide discharging opening, calcium carbide feed systemCharging aperture, collects calcium carbide by calcium carbide discharging gathering system, then sends into calcium carbide feed system, forms continuously and carries.Water screen system and calcium carbide feed system are put and be arranged in tunnel, can not attach dust problem, avoided calcium carbideThe dangerous dust that dust easily causes and contaminated environment; In calcium carbide course of conveying, complete calcium carbide heat collection,Having saved calcium carbide can cooling storehouse and its cooling needed equipment, has saved occupation of land, and heat utilization method letterClean, Process Equipment is energy-conservation, simple, invests lowly, and energy-saving effect is the highest, and collected heat can generate electricity also passableDo other application. Heat transfer protection tube is calcium carbide feed system and tunnel, water screen system isolation, protection tunnel withWater screen system, especially calcium carbide feed system adopt semi-canal type, plano-concave formula conveyance conduit, chain conveyor orWhen scraper conveyor, calcium carbide likely falls tunnel from conveyance conduit, chain conveyor, drag conveyorRoad, heat transfer protection tube plays a protective role; In addition, if water-cooling wall breakage causes cooling water leakage, due to biographyThe isolation of heat protective tube, has avoided cooling water to contact with calcium carbide and has produced dangerous.
Preferably, described calcium carbide feed system is conveyance conduit, chain conveyor, ribbon conveyer or scraper plateFormula conveyer; Described conveyance conduit is full tubular type, semi-canal type or plano-concave formula.
In described conveyance conduit, be provided with calcium carbide propulsive mechanism, this calcium carbide propulsive mechanism is conveying worm, utilizesConveying worm constantly stirs stirring calcium carbide.
Preferably, described water screen system comprises water-cooling wall, and the two ends up and down of described water-cooling wall arrange respectively water-cooledWall top carbonated drink concetrated pipe, water-cooling wall bottom water concetrated pipe, described water-cooling wall top carbonated drink concetrated pipe, water-cooling wallBottom water concetrated pipe is connected with drum respectively. Water enters water-cooling wall bottom water concetrated pipe from drum bottom, and flows throughAfter water-cooling wall, water-cooling wall top carbonated drink concetrated pipe, enter drum, and in drum, complete carbonated drink separate, steam fromIn drum, after output, can be used for generating or do other application.
In high temperature section, middle-temperature section and low-temperature zone, can adopt natural circulation mode, the water in drum is from vapourBag bottom enters water-cooling wall bottom water concetrated pipe, and enters after the water-cooling wall of flowing through, water-cooling wall top carbonated drink concetrated pipeIn drum, complete once circulation. But in high temperature section, because calcium carbide temperature is very high, adopt natural circulation mode unfavorableIn Rapid Thermal exchange, therefore, for strengthening heat transfer effect, the water screen system that is positioned at height, middle-temperature section comprises water-cooledWall, the two ends up and down of described water-cooling wall arrange respectively water-cooling wall top carbonated drink concetrated pipe, the set of water-cooling wall bottom waterPipe, described water-cooling wall top carbonated drink concetrated pipe is connected with drum, and this drum is also by pump and described water-cooling wall bottomWater concetrated pipe connects. Water flows out from drum bottom, after pump pressurization, enters water-cooling wall bottom water concetrated pipe, and streamAfter water-cooling wall, water-cooling wall top carbonated drink concetrated pipe, enter drum, and carry out carbonated drink separation in drum.
Preferably, described calcium carbide feed system high temperature section is provided with overheated steam pipe, this overheated steam pipe with described inThe steam (vapor) outlet of drum is communicated with, and enters overheated steam pipe be heated into overheated steaming from the steam of drum steam (vapor) outlet outputVapour, superheated steam can be sent to acting or make other techniques and use. In described drum, be provided with evaporimeter, water-cooling wallIntrasystem circulating cooling medium can not adopt water, and adopts other media of heat conduction wet goods, and conduction oil is from drumInside enter water-cooling wall, in water-cooling wall, after heat exchange, get back in drum, carry out heat exchange with the water in evaporimeter, produceHigh steam drives acting, the use of exhaust steam technique.
For ease of operative employee's operation with reach security protection object, on described tunnel, offer operational observations hole,This operational observations hole is corresponding with described furnace of calcium carbide discharging opening, and operative employee carries out calcium carbide material by operational observations hole and comes out of the stoveOperation.
For ease of the discharging of calcium carbide feed system discharge end, being connected of convenient and follow-up calcium carbide material storehouse etc., described electricityThe discharge end of stone feed system stretches out outside described tunnel.
The present invention has following remarkable advantage: (1) heat utilization method is succinct, and Process Equipment is energy-conservation, simple, throwsProvide lowly, energy-saving effect is the highest, and institute's producing steam can generate electricity and also can do other application; (2) cooling procedure can be preventedOnly calcium carbide stone roller solidifies, and has avoided calcium carbide pot stone roller to solidify the Crushing Problem of bulk, has reduced the operation danger of subsequent handlingDangerous and cost, if transformation can also directly realize and the fusion of lower procedure a little, shortening technique process,Joint person, joint consume; (3) simple to operate, it is exactly well a work and ring that Waste Heat Recovery is utilized method itselfBorder protection process; (4) calcium carbide dust is inflammable, easily causes dangerous dust atmosphere, the not subsidiary dust of the present inventionProblem; (5) saving calcium carbide can cooling storehouse and its cooling needed equipment, has saved occupation of land; (6) easyRealize the technological transformation that closed type calcium carbide furnace calcium carbide discharging used heat is utilized; (7) conveying system periphery is provided with heat transferProtection tube, makes system nature's safety.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is height of the present invention, middle-temperature section forced circulation heat exchange schematic diagram;
Fig. 3 non-device of working medium of the present invention is high, middle-temperature section forced circulation heat exchange schematic diagram;
Fig. 4 is low-temperature zone Natural Circulation heat exchange schematic diagram of the present invention;
Fig. 5 is non-device of working medium low-temperature zone Natural Circulation heat exchange schematic diagram of the present invention;
Fig. 6 is height of the present invention, middle-temperature section heat exchange structure schematic diagram;
Fig. 7 is the described low-temperature zone heat exchange structure schematic diagram of invention.
In figure: 1-furnace of calcium carbide discharging opening; 2-calcium carbide discharging gathering system; 3-operational observations hole; The feeding of 4-calcium carbideSystem; 4-1-supporting mechanism; 4-2-conveyance conduit; 4-3-conveying worm; 5-water screen system; 5-1-water-cooledWall; 5-2-water-cooling wall bottom water concetrated pipe; 5-3-water-cooling wall top carbonated drink concetrated pipe; 5-4-communicating pipe; 5-5-vapourBag; 5-6-steam is sent pipe outside; 5-7-moisturizing water pipe; 5-8-pumping intake piping; 5-9-pump; 5-10-pump discharge pipe; 5-11-Fluid level controller; 5-12-down-comer; 5-13-evaporimeter; 6-tunnel; 7-calcium carbide feed system discharging opening; 8-Furnace of calcium carbide; 9-heat transfer protection tube.
Detailed description of the invention
As shown in Figure 1, the present invention includes sealing tunnel 6, calcium carbide feed system 4 and water screen system 5, electricityStone feed system 4 is positioned at tunnel 6 with water screen system 5, calcium carbide feed system discharging opening 7 and calcium carbide material storehouseEquipment connection in room (not shown) or other subsequent handlings, for convenience of 4 dischargings of calcium carbide feed system,Calcium carbide feed system discharging opening 7 stretches out outside tunnel 6; The outside of calcium carbide feed system 4 is surrounded by heat transfer protection tube 9,Water screen system 5 is arranged on heat transfer protection tube 9 peripheries; Feed end in calcium carbide feed system 4 is provided with calcium carbideDischarging gathering system 2, when calcium carbide production, is piled up in calcium carbide discharging gathering system 2 places, collects through calcium carbide dischargingSystem 2 enters calcium carbide feed system 4 after collecting; Because calcium carbide production is discontinuous, collect system by calcium carbide dischargingThe collection of system 2, forms continuous conveying, can be to calcium carbide feed system friction feeding. Calcium carbide discharging gathering system 2Can adopt feeder, the two ends of feeder connect respectively furnace of calcium carbide discharging opening and calcium carbide feed system; Also canAdopt carbide pushcarts, collect after full calcium carbide when carbide pushcarts, calcium carbide is sent into calcium carbide feed system. For ease of behaviourThe needs of work and security protection offer operational observations hole 3, operational observations hole 3 and furnace of calcium carbide on tunnel 6Discharging opening 1 correspondence, operative employee carries out by operational observations hole 3 operation that calcium carbide material is come out of the stove. From furnace of calcium carbide 8The calcium carbide of discharging opening output is stirred to stir by calcium carbide feed system 4 and carries, in course of conveying, by radiation andCalcium carbide heat is passed to water screen system 5 by convection heat transfer' heat-transfer by convection, carries out heat exchange with water screen system. Can from figureTo find out, on furnace of calcium carbide 8, there are multiple furnace of calcium carbide discharging openings (furnace of calcium carbide discharging opening is arranged on furnace of calcium carbide bottom more),Tunnel 6 and calcium carbide feed system 4 are arranged on the periphery of furnace of calcium carbide 8, almost furnace of calcium carbide bottom are wrapped up.The cross section in tunnel 6 can be designed to arch, can be exactly also common factory building, and tunnel 6 mainly plays isolated extraneousThe effect of environment, can design different shapes according to actual needs. When calcium carbide discharging, calcium carbide is from furnace of calcium carbide dischargingAfter mouth 1 output, collect through calcium carbide discharging gathering system 2, and export calcium carbide to calcium carbide feed system, formContinuously conveying, calcium carbide feed system 4 stirs stirs conveying, calcium carbide at course of conveying by radiation and convection heat transfer' heat-transfer by convectionTransfer heat to the heat transfer protection tube 9 that wraps in calcium carbide feed system 4 outsides, and be arranged on heat transfer protection tubeThe water screen system 5 of 9 peripheries carries out heat exchange.
As shown in Figure 2-5, water screen system 4 comprises water-cooling wall 5-1, and the two ends up and down of water-cooling wall 5-1 respectivelyWater-cooling wall top carbonated drink concetrated pipe 5-3, water-cooling wall bottom water concetrated pipe 5-2 are set, water-cooling wall top carbonated drink collectionClosing pipe 5-3, water-cooling wall bottom water concetrated pipe 5-2 is connected with drum 5-5 respectively. According to the height of calcium carbide temperature,Calcium carbide feed system 4 is divided into high temperature section, middle-temperature section and low-temperature zone, nearer apart from calcium carbide discharging opening, the heat of calcium carbideMeasure greatlyr, temperature is higher. Adopting heat radiation in high temperature section is main, middle-temperature section employing heat radiation heated convection, lowIt is main heat transfer type that temperature section adopts thermal convection current.
As shown in Figure 2,6, adopt forced circulation method at high, middle-temperature section, circulating cooling medium makes water,That is, between drum 5-5 and water-cooling wall bottom water concetrated pipe 5-2, set up pump 5-9, utilize pump 5-9 by drumThe water pressurized delivered of 5-5 output, to water-cooling wall bottom water concetrated pipe 5-2, is strengthened heat transfer effect. In drum 5-5Water is from drum 5-5 bottom, to pumping intake piping 5-8, through pump 5-9 pressurization, to pump discharge pipe 5-10, to water-cooledWall bottom water concetrated pipe 5-2, to water-cooling wall 5-1, to water-cooling wall top carbonated drink concetrated pipe 5-3, to communicating pipe 5-4,To drum, 5-5 completes circulation, carries out carbonated drink separation in drum 5-5, and the water circulation of drum 5-5 bottom is used,The isolated steam in drum 5-5 top is sent pipe 5-6 outside through steam and is sent utilization outside. Fluid level controller 5-11 is to drum5-5 carries out liquid level control, if the water level of drum 5-5 lower than requiring, by moisturizing water pipe 5-7 to drumMoisturizing in 5-5.
As shown in Figure 3, adopt forced circulation method at high, middle-temperature section, circulating cooling medium uses other heating agentsWhen Jie's working medium, as conduction oil, between drum 5-5 and water-cooling wall bottom water concetrated pipe 5-2, set up pump 5-9,Utilize pump 5-9 by the conduction oil pressurized delivered of drum 5-5 output to water-cooling wall bottom water concetrated pipe 5-2, strengthenHeat transfer effect, is provided with water evaporimeter 5-13 in drum 5-5. Other heating agent working medium in drum 5-5 are from drumBottom 5-5, to pumping intake piping 5-8, through pump 5-9 pressurization, to pump discharge pipe 5-10, to water-cooling wall bottom water collectionClose pipe 5-2, to water-cooling wall 5-1, to water-cooling wall top carbonated drink concetrated pipe 5-3, to communicating pipe 5-4, to drum5-5 completes circulation, in drum 5-5, carries out heat exchange with evaporimeter, produces high steam and drives acting, exhaust steamBe used as technique.
In the high temperature section of calcium carbide feed system, overheated steam pipe (not shown) can also be set, this is overheatedSteam pipe is communicated with the steam (vapor) outlet of drum 5-5, sends into overheated steam pipe heating from the steam of drum 5-5 outputBecome superheated steam, superheated steam can be sent to acting or be used as other techniques.
As shown in Fig. 4,7, low-temperature zone adopts Natural Circulation, and circulating cooling medium makes water, in drum 5-5Water from drum 5-5 bottom to down-comer 5-12, to water-cooling wall bottom water concetrated pipe 5-2, to water-cooling wall 5-1,To water-cooling wall top carbonated drink concetrated pipe 5-3, complete circulation to communicating pipe 5-4, to drum 5-5; At drum 5-5Inside carry out carbonated drink separation, the water circulation of drum 5-5 bottom is used, and the isolated steam in drum 5-5 top is through steamingVapour is sent pipe 5-6 outside and is sent utilization outside, fluid level controller 5-11 can be set equally drum 5-5 is carried out to liquid level control.Middle-temperature section both can adopt forced circulation, also can use self-loopa, certainly, and high temperature section, middle-temperature section, low temperatureThe water screen system that section is used specifically adopts forced circulation or self-loopa, can arrange according to actual conditions.
As shown in Figure 5, low-temperature zone adopts Natural Circulation, and circulating cooling medium uses heat conduction wet goods, drum 5-5In conduction oil from drum 5-5 bottom to down-comer 5-12, to water-cooling wall bottom water concetrated pipe 5-2, to water-cooledWall 5-1, to water-cooling wall top carbonated drink concetrated pipe 5-3, complete circulation to communicating pipe 5-4, to drum 5-5,In drum, carry out heat exchange with evaporimeter.
As shown in Fig. 1,4, calcium carbide feed system 4 is preferably used conveyance conduit 4-2, and conveyance conduit 4-2 passes throughSupporting mechanism 4-1 is located and is fixed in tunnel 6. Conveyance conduit 4-2 tiltable arranges, to calcium carbide feed systemDischarging opening 7 tilts, and is convenient to calcium carbide and carries. In conveyance conduit 4-2, be provided with conveying worm 4-3, spiral transferringSend machine helical form to promote calcium carbide in carrier pipe and move ahead, calcium carbide heat passes to conveyance conduit 4-2, conveyance conduit 4-2Become radiant tube, conduct heat to water-cooling wall radiation and convection; This conveyance conduit is full tubular type, i.e. the cross section of conveyance conduitFor closed circle, this pipeline transporting resistance is large, but in tunnel without the calcium carbide that is scattered, totally clean, water-cooling wall is not yetCan increase thermal resistance because of the ash that falls. Conveyance conduit 4-2 also can adopt semi-canal type, as shown in Figure 7, that is, carriesThe cross section of pipeline 4-2 is the semicircle not sealing, and this mode feeding friction resistance is little, but the calcium carbide that is midway easily scattered,Water-cooling wall easily falls ash and increases thermal resistance. Conveyance conduit 4-2 can also adopt plano-concave formula, that is, and and conveyance conduit bottomRecessed, the dual-side of pipeline is higher than recessed bottom. Calcium carbide feed system 4 also can use chain conveyor,The replacement such as ribbon conveyer or drag conveyor. Be coated with heat transfer protection tube 9 in the outside of calcium carbide feeding 4, shouldThe heat conduction of heat transfer protection tube, heat transfer protection tube 9 separates calcium carbide feed system 4 and water screen system 5, tunnel 6,Play the effect in protection water screen system 5, tunnel 6, especially when calcium carbide feed system adopts semi-canal type, plano-concaveThe situation of formula conveyance conduit, chain conveyor, ribbon conveyer, drag conveyor, calcium carbide is likely scatteredAnd damage water screen system and tunnel; In addition, if water-cooling wall breakage causes circulating cooling medium to leak, due toBe provided with heat transfer protection tube, avoided the media such as cooling water to contact with calcium carbide and produce dangerously, make this method systemThere is the security of this materialization.
Claims (12)
1. calcium carbide Waste Heat Recovery is utilized a method, it is characterized in that: in sealing tunnel, go out from furnace of calcium carbideMaterial mouthful is collected after calcium carbide, and calcium carbide is delivered to calcium carbide feed system continuously, forms continuous conveying, and calcium carbide is being carriedProcess transfers heat to the biography that is coated on described calcium carbide feed system outside by radiation and convection heat transfer' heat-transfer by convection modeHeat protective tube, passes to the water screen system that is arranged on described heat transfer protection tube periphery through heat transfer protection tube.
2. calcium carbide Waste Heat Recovery as claimed in claim 1 is utilized method, it is characterized in that: according to calcium carbide temperatureThe height of degree, calcium carbide feed system is divided into high temperature section, middle-temperature section and low-temperature zone, high temperature section adopt heat radiation be main,It is main heat transfer type that middle-temperature section adopts heat radiation heated convection, low-temperature zone to adopt thermal convection current.
3. calcium carbide Waste Heat Recovery as claimed in claim 1 is utilized method, it is characterized in that: calcium carbide is describedIn course of conveying in calcium carbide feed system, be constantly stirred and stir.
4. calcium carbide Waste Heat Recovery as claimed in claim 2 is utilized method, it is characterized in that: in high, middle temperatureSection, the circulating cooling medium of described water screen system adopts forced circulation mode; In low-temperature zone, described water-cooling wallThe circulating cooling medium of system adopts natural circulation mode; What after described water screen system and calcium carbide heat exchange, produce is fullSend described calcium carbide feed system high temperature section back to steam and be heated as superheated steam.
5. a calcium carbide waste heat recycling system, is characterized in that: comprise sealing tunnel, calcium carbide feeding systemThe water screen system of unifying; Described calcium carbide feed system is arranged in described tunnel, and its outside is coated with the protection of conducting heatPipe; Described calcium carbide feed system entrance point is provided with calcium carbide discharging gathering system, this calcium carbide discharging gathering system withFurnace of calcium carbide discharging opening connects; Described water screen system is arranged on described heat transfer protection tube periphery.
6. calcium carbide waste heat recycling system as claimed in claim 5, is characterized in that: described calcium carbide sendMaterial system is conveyance conduit, chain conveyor, ribbon conveyer or drag conveyor; Described conveyance conduit isFull tubular type, semi-canal type or plano-concave formula.
7. calcium carbide waste heat recycling system as claimed in claim 6, is characterized in that: described carrier pipeIn road, be provided with calcium carbide propulsive mechanism, this calcium carbide propulsive mechanism is conveying worm.
8. calcium carbide waste heat recycling system as claimed in claim 5, is characterized in that: described water-cooling wallSystem comprises water-cooling wall, and the two ends up and down of described water-cooling wall arrange respectively water-cooling wall top carbonated drink concetrated pipe, water-cooledWall bottom water concetrated pipe, described water-cooling wall top carbonated drink concetrated pipe, water-cooling wall bottom water concetrated pipe respectively with drumConnect.
9. calcium carbide waste heat recycling system as claimed in claim 8, is characterized in that: according to calcium carbide temperatureThe height of degree, calcium carbide feed system is divided into high temperature section, middle-temperature section and low-temperature zone; Be positioned at the water-cooled of height, middle-temperature sectionWall system also comprises pump, and described drum is connected with described water-cooling wall bottom water concetrated pipe by pump.
10. calcium carbide waste heat recycling system as claimed in claim 9, is characterized in that: described calcium carbide sendMaterial system high temperature section is provided with overheated steam pipe, and this overheated steam pipe is communicated with the steam (vapor) outlet of described drum.
Calcium carbide waste heat recycling system as described in 11. claims as arbitrary in claim 5-9, its feature existsIn: on described tunnel, offer operational observations hole, this operational observations hole is corresponding with described furnace of calcium carbide discharging opening.
Calcium carbide waste heat recycling system as described in 12. claims as arbitrary in claim 5-9, its feature existsIn: the discharge end of described calcium carbide feed system stretches out outside described tunnel.
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| CN201510206082.XA CN105588449A (en) | 2015-04-27 | 2015-04-27 | Calcium carbide waste heat recycling method and recycling system |
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| CN201510206082.XA CN105588449A (en) | 2015-04-27 | 2015-04-27 | Calcium carbide waste heat recycling method and recycling system |
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| CN108007223A (en) * | 2018-01-12 | 2018-05-08 | 重庆岩昱节能科技有限公司 | Crawler type calcium carbide waste-heat recovery device and recovery method |
| CN109095470A (en) * | 2018-07-16 | 2018-12-28 | 安徽华塑股份有限公司 | A kind of furnace of calcium carbide convenient for high activity carbon granule is added |
| CN114180575A (en) * | 2021-12-31 | 2022-03-15 | 安徽华塑股份有限公司 | Energy-saving consumption-reducing analysis method in calcium carbide production process |
| CN114688887A (en) * | 2022-03-25 | 2022-07-01 | 江苏联储能源科技有限公司 | Calcium carbide furnace mouth radiant heat waste heat recovery leakage-proof device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108007223A (en) * | 2018-01-12 | 2018-05-08 | 重庆岩昱节能科技有限公司 | Crawler type calcium carbide waste-heat recovery device and recovery method |
| CN109095470A (en) * | 2018-07-16 | 2018-12-28 | 安徽华塑股份有限公司 | A kind of furnace of calcium carbide convenient for high activity carbon granule is added |
| CN114180575A (en) * | 2021-12-31 | 2022-03-15 | 安徽华塑股份有限公司 | Energy-saving consumption-reducing analysis method in calcium carbide production process |
| CN114180575B (en) * | 2021-12-31 | 2024-02-20 | 安徽华塑股份有限公司 | Energy saving and consumption reduction analysis method in calcium carbide production process |
| CN114688887A (en) * | 2022-03-25 | 2022-07-01 | 江苏联储能源科技有限公司 | Calcium carbide furnace mouth radiant heat waste heat recovery leakage-proof device |
| CN114688887B (en) * | 2022-03-25 | 2024-03-22 | 江苏联储能源科技有限公司 | Leakage-proof device for recovering waste heat of radiant heat of calcium carbide furnace mouth |
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Effective date of registration: 20160520 Address after: 224212 Yancheng City Dongtai city of Jiangsu province Qindong town Caoshe Village (Dongtai Yuanyang stainless steel manufacturing Co. Ltd. business premises) Applicant after: Yancheng ocean energy saving Technology Co., Ltd. Address before: 210009 Jiangsu city of Nanjing province dingjiaqiao No. 30 Applicant before: Nanjing Shengnuo Heat Pipe Co., Ltd. |
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