CN102952908B - Equipment and method for steel slag air quenching and waste heat recycling - Google Patents
Equipment and method for steel slag air quenching and waste heat recycling Download PDFInfo
- Publication number
- CN102952908B CN102952908B CN201210387654.5A CN201210387654A CN102952908B CN 102952908 B CN102952908 B CN 102952908B CN 201210387654 A CN201210387654 A CN 201210387654A CN 102952908 B CN102952908 B CN 102952908B
- Authority
- CN
- China
- Prior art keywords
- slag
- fluidized
- bed
- cooling
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/06—Conveyors on which slag is cooled
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/076—Fluidised bed for cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Furnace Details (AREA)
Abstract
Equipment and method for steel slag air quenching and waste heat recycling belongs to the technical field of the steel slag processing equipment and method. Steel slag air quenching and waste heat recycling processes are utilized to treat high-temperature steel slags and recovering heat; and the technical scheme is as follows: in the equipment, an air quenching slag pot is connected with a pelletization air tunnel which is connected with a grate cooling conveyor; the grate cooling conveyor is connected with a high-temperature-resistant bucket elevator; the high-temperature-resistant bucket elevator is connected with a circulating fluidized bed heat recovery boiler; an external nitrogen pipeline is connected with the pelletization air tunnel and the grate cooling conveyor, respectively; and a nitrogen circulating pipeline is connected with the high-temperature-resistant bucket elevator and the circulating fluidized bed heat recovery boiler, respectively. The process flow comprises hardening and cracking liquid-state steel slags into even particles by using low-temperature nitrogen, and then feeding the steel slag particles to the circulating fluidized bed heat recovery boiler through pneumatic transmission so as to collect waste heat and zero-valent iron. The integrated steel slag air quenching process provided by the invention is in a world leading level and is innovation of liquid-state steel slag treatment and heat recovery, thereby having wide prospect.
Description
Technical field
The present invention relates to a kind of processing of converter steelmaking high-temperature steel slag and equipment and the method for recovery heat, belong to bessemer furnace slag treatment facility and method and technology field.
Background technology
The processing of converter steelmaking high-temperature steel slag is the necessary links during converter steelmaking is produced, and cold method, the hot application method of abandoning adopting be in the past because its investment is large, it is large to take up an area, environmental pollution is serious, and processing unit and production operation personnel are the unfavorable factors such as many all, now suffer exit.Dish water-sprinkling cold process, technique is loaded down with trivial details, link is many, working cost is high, waste water, and has belonged to backward technique.What at present application was more is water quenching and the wind method of quenching.The shortcoming of water quenching is to utilize slag sensible heat, and environmental pollution is larger.Slag processing stopping property is poor, and steam flue dust collecting difficulty, causes local environment severe, and slag sensible heat can not effectively utilize.Although wind is quenched method process high temperature furnace slag technology can recovery part high temperature furnace slag heat, solid slag particle diameter after treatment is larger, solution-air, gas-solid heat transfer coefficient are little, therefore have the problems such as gas consumption amount is large, equipment is huge, heat recuperation rate is low.If the method for directly wind being quenched is for liquid steel slag processing, air is as heat-eliminating medium, because making the iron in slag, oxygenizement is oxidized in a large number, not only there is the danger of blast, and waste fe resource, also brought very large difficulty to later stage fine grinding magnetic separation process, the increase of slag iron-holder, utilization ratio are reduced.Therefore in the urgent need to developing new equipment and process, converter high-temperature steel slag is effectively processed and heat recovery and utilization.
In view of the problem that existing equipment and process exists, new equipment and process need to solve following problem:
(1) problem of fe element loss in slag.After slag tapping, in slag, contain part fe element, because its temperature is very high, can reach 1400 DEG C, with air or the direct contact process of water in, will inevitably be oxidized, become Fe
2o
3or FeO, has caused the serious waste of resource.
(2) airborne dust or raise vapour.In common vexed slag, magnetic separation or Water Quenching process, inevitably produce a large amount of flue dust or steam, cause environmental pollution.
(3) high temperature slag particle is collected problem.In granulating, high-temperature liquid state slag is as unrestrained in a shower of direction along jet-stream wind, need to effectively collect.
(4) consumption of nitrogen.Except hardening crack slag, course of conveying, the heat exchange of steel slag particles before cooling down all will be carried out under nitrogen environment, and needed nitrogen amount is surprising, and therefore how reducing nitrogen usage quantity or recycle is the problem that must solve.
(5) equipment internal pressure release And Spread of Solute.Before hardening crack starts, the gas in treatment facility is envrionment temperature, and after temperature sharply raises, gas volume expands rapidly, and pressure moment raises, if do not taken measures must damage system component.
(6) high-temperature space mass transport.Temperature in whole granulation wind-tunnel is 300 DEG C of left and right, and all cisco unity malfunctions of general e Foerderanlage, need the device for transporting objects that can move under hot environment.
(7) feed is inhomogeneous.If high temperature slag particle can not be realized feed equably, probably on certain conveying process, cause secondary knot to stick together, lump, cause the major accident of stopping production.
(8) steel slag particles heat exchange.How the physics sensible heat of high-temperature steel slag particle being reclaimed, is a very large difficult problem.If adopt conventional single cylinder cooling machine, the specification needing is quite huge, and will be equipped with water-cooled simultaneously, and the hot water obtaining does not have utility value.If employing slag cooler, only can obtain the hot water of 80 DEG C of left and right, and quantity is surprising, need huge cooling water equipment.
Summary of the invention
Technical problem to be solved by this invention is to provide that a kind of slag gas is quenched and equipment and the method for heat recovery; this equipment and method can complete the whole process of high-temperature steel slag being carried out to gas hardening crack, wind-tunnel granulation, conveying, fluidisation heat exchange and high-temperature flue gas heat recuperation, realize effective processing and the heat recuperation of high-temperature steel slag.
The technical scheme solving the problems of the technologies described above is:
A kind of slag gas is quenched and the equipment of heat recovery, it comprises the wind slag ladle of quenching, granulation wind-tunnel, cooling transfer roller, high temperature sesistant bucket elevator, circulating fluidized bed waste heat boiler, nitrogen circulation pipeline, external nitrogen pipeline, the quench slag-drip opening of slag ladle of wind is connected with the slag inlet of granulation wind-tunnel, granulation wind-tunnel is connected with cooling transfer roller, cooling transfer roller is connected with the opening for feed of high temperature sesistant bucket elevator by pipeline, the discharge opening of high temperature sesistant bucket elevator is connected with the warehouse of circulating fluidized bed waste heat boiler, the slag-drip opening of circulating fluidized bed waste heat boiler is connected with slag warehouse with tailings warehouse by rotary conveyor, external nitrogen pipeline respectively with granulation wind-tunnel, cooling transfer roller is connected, nitrogen circulation pipeline respectively with high temperature sesistant bucket elevator, circulating fluidized bed waste heat boiler is connected.
Above-mentioned slag gas is quenched and the equipment of heat recovery, described cooling transfer roller comprises bellows, grate plate, cooling nitrogen circulation blower fan, sidewall baffle plate, bellows are rectangle closure casing, the upper opening of bellows, grate plate is arranged in parallel and is connected to bellows upper opening place, grate plate is polylith, gapped between adjacent grate plate, grate plate plate face is vertical with the longitudinal axis of bellows, cooling nitrogen circulation assembling is in bellows outside, there is blast inlet in bellows side, cooling nitrogen circulation fan outlet is connected with blast inlet, in grate plate both sides, sidewall baffle plate is installed, on the medial surface of sidewall baffle plate, be coated with refractory materials, cooling nitrogen circulation blower fan is connected with automatic control device.
Above-mentioned slag gas is quenched and the equipment of heat recovery, described high temperature sesistant bucket elevator comprises casing, drive unit, upper sprocket wheel, lower sprocket, chain, hopper, drive unit is arranged on casing top platform, upper sprocket wheel and lower sprocket are arranged on respectively the top and bottom of chassis cavity, chain ring is around upper sprocket wheel and lower sprocket, hopper is arranged on chain, opening for feed and discharge opening are arranged respectively at the bottom of casing and top, blast inlet is arranged at the bottom at casing, there is air outlet on top, a chapelet cooling blower is installed at blast inlet place, chapelet cooling blower has pipeline to be connected with nitrogen circulation pipeline.
Above-mentioned slag gas is quenched and the equipment of heat recovery, described circulating fluidized bed waste heat boiler is by body of heater, warehouse, fluidized-bed burner hearth, convective heat exchange air compartment, afterbody economizer composition, warehouse skin is Steel Sheel, build by laying bricks or stones for flame-proof thermal insulation material the inside, warehouse is arranged on boiler platform framework, warehouse bottom is connected with the upper strata fluidized-bed of fluidized-bed burner hearth by slag elephant trunk, there is heat exchange pipe laying the top of upper strata fluidized-bed, fluidized-bed logical charge tube in upper strata is connected with lower floor fluidized-bed, on lower floor's fluidized-bed, there is slag blocking wall, there is abrasive grit row mouthful in slag blocking wall inner side, there is slag-drip opening in slag blocking wall outside, there is fluidized gas entrance the below of lower floor's fluidized-bed, top one side of the heat exchange pipe laying of fluidized-bed burner hearth has high-temperature flue gas entry, opposite side is connected with convective heat exchange air compartment by furnace wall cooling, in convective heat exchange air compartment, convection bank is installed, convective heat exchange air compartment rear portion is connected with afterbody economizer, low-temperature flue gas outlet is arranged at the top of afterbody economizer, bottom arranges cinder-discharging port.
Above-mentioned slag gas is quenched and the equipment of heat recovery, described nitrogen circulation pipeline is connected with blast inlet, the fluidized gas entrance of circulating fluidized bed waste heat boiler, the low-temperature flue gas outlet of high temperature sesistant bucket elevator respectively, and fluidized-bed nitrogen circulation blower fan, ceramic multicyclone dust collector are installed in nitrogen circulation pipeline.
Above-mentioned slag gas is quenched and the equipment of heat recovery, and the high-temperature flue gas pipeline of described granulation wind-tunnel and cooling transfer roller is connected with the high-temperature flue gas entry of circulating fluidized bed waste heat boiler.
Slag gas is quenched and the method for heat recovery, and it adopts following technical process:
(1) converter high-temperature steel slag is poured onto granulation wind-tunnel by the wind slag ladle of quenching, and flows in the grate plate of cooling transfer roller along the inclination end opening of granulation wind-tunnel;
(2) cooling nitrogen circulation blower fan enters the every joint bellows of cooling transfer roller by nitrogen by blast inlet, then by the gap ejection between the grate plate of upper strata, to quenching of slag and air conveying;
(3) output terminal of cooling transfer roller is transported to slag by pipeline the opening for feed of high temperature sesistant bucket elevator, fall into high temperature sesistant bucket elevator hopper, chain is the discharge opening to casing top by bunker lift, and slag is transported to the warehouse of circular fluid bed from discharge opening.
(4) when the high-temperature steel slag in circular fluid bed warehouse slips in fluidized-bed burner hearth, carry out the heat exchange of slag fluidisation, the slag blocking wall of lower floor's fluidized-bed and iron grain elephant trunk are effectively collected the iron grain in slag; The furnace wall cooling convective heat exchange of high-temperature flue gas process fluidized-bed burner hearth simultaneously, then enter stream heat exchange air compartment through the further heat exchange of convection bank, low-temperature flue gas is discharged; In said process, fluidized gas is to blast by fluidized gas entrance, on two-step fluidized bed with the heat exchange of high-temperature steel slag particle after, enter fluidized-bed burner hearth and high-temperature flue gas and converge, with high-temperature flue gas continue operation; Iron grain and all the other slags are discharged from abrasive grit row mouth and the slag-drip opening of fluidized-bed burner hearth below, are transported to slag warehouse and tailings warehouse through handling equipment.
Above-mentioned slag gas is quenched and the method for heat recovery, described to quenching of slag, air conveying, promote carry, in the process of fluidisation heat exchange, nitrogen along nitrogen circulation pipeline respectively with pass into the blast inlet of high temperature sesistant bucket elevator, the fluidized gas entrance of circulating fluidized bed waste heat boiler, and discharge from the low-temperature flue gas outlet of circulating fluidized bed waste heat boiler, keep closed circulation state.
Above-mentioned slag gas is quenched and the method for heat recovery; nitrogen in described external nitrogen pipeline passes into by cooling nitrogen circulation blower fan that granulation wind-tunnel and cooling transfer roller carry out that gas is quenched and is air conveying; then discharge from the high-temperature flue gas pipeline of granulation wind-tunnel and cooling transfer roller, enter the high-temperature flue gas entry of circular fluid bed.
Usefulness of the present invention is:
It is the commanding elevation of iron and steel enterprise's energy-saving and emission-reduction that liquid steel slag sensible heat reclaims, and is the key that realizes iron and steel enterprise's loopful surplus pick up the heat.The present invention adopts low temperature nitrogen that liquid steel slag hardening crack is become to single-size, again by air conveying, steel slag particles is delivered in circulating fluidized bed waste heat boiler, and the waste heat of slag and the waste heat of high-temperature flue gas are collected by boiler, deliver to pipe network for generating with the form of high pressure steam; Fe in steel slag particles separates and discharges via boiler fluidized-bed, returns to steel-making recycling, and residue steel slag particles further separates through magnetic separation, and fe reclaims, and rest part can be made cement spike.Slag gas of the present invention is quenched integrated artistic in world lead level, is the innovation of liquid steel slag processing and recovery of heat, has broad prospects, and can widely popularize in the whole industry.
The present invention has following characteristics:
(1) process range is large.Most of slag of STEELMAKING PRODUCTION, all possesses good mobility, can adopt the gas art breading of quenching.Meanwhile, along with the success of slag modified test, the mobility of slag is greatly improved, and quenching to process for gas provides the larger space of putting to good use.
(2) treatment cycle is short.Traditional hot application, vexed slag, magnetic separation process often will just can complete through time of a couple of days, and the gas technique of quenching possesses the processing power of 1t/min, in short 10min, just Baogang's slag can be disposed, and does not need long time.
(3) floor space is little, processing environment good.The gas place that technique has been saved hot application, vexed slag, bored brokenly of quenching, processes required site area little.All processes of having bad luck of solid steel slag all complete in closed system, do not have the problem of airborne dust, meet the requirement of cleaner production.
(4) fe recovery is convenient, efficiency is high.Most of abrasive grit in slag all naturally sorts out by gravity factor in the inner circulation fluidized heat transfer process of boiler, has reduced the input of equipment.Meanwhile, because whole treatment process is all to carry out, do not have the problem of the interior ferro element secondary oxidation of slag under hot conditions under nitrogen environment, so can reclaim after farthest fe, it is large that fe reclaims ratio.
(5) energy consumption is low.Nitrogen recycle in system pipeline for hardening crack and fluidisation, consumption is very little.Optimize boiler fluidized-bed, the design of the key equipments such as cooling transfer roller, draught fan matching is less energy-consumption product.
(6) UTILIZATION OF VESIDUAL HEAT IN efficiency is high.Liquid steel slag, after hardening crack, produces a large amount of steel slag particles, and temperature is more than 800 DEG C, and nitrogen is heated to 1000 DEG C of left and right simultaneously.After steel slag particles transports by cooling transfer roller, temperature is still 800 DEG C of left and right, and circulating fluidized bed waste heat boiler can cement out the heat in the physics sensible heat of slag and high temperature nitrogen, produces a large amount of saturation steams, for generating.
(7) good product quality.Gas quench steel slag dynamics is even, processes easy.After selecting fe, remain tailings through the evidence of cement manufacturing company, the slag of the vexed processing of grindability index specific heat will be got well, and has good market outlook.
Brief description of the drawings
Fig. 1 is one-piece construction of the present invention and process flow diagram;
Fig. 2 is cooling conveyor construction schematic diagram;
Fig. 3 is high temperature sesistant bucket elevator structural representation;
Fig. 4 is circulating fluidized bed waste heat boiler structural representation.
In figure, mark is as follows: wind quench slag ladle 1, granulation wind-tunnel 2, cooling transfer roller 3, high temperature sesistant bucket elevator 4, circulating fluidized bed waste heat boiler 5, nitrogen circulation pipeline 6, external nitrogen pipeline 7, cooling nitrogen circulation blower fan 8, chapelet cooling blower 9, fluidized-bed nitrogen circulation blower fan 10, rotary conveyor 11, high-temperature flue butterfly valve 12, electric butterfly valve 13, ceramic multicyclone dust collector 14, slag warehouse 15, tailings warehouse 16, external source nitrogen 17;
Bellows 3-1, grate plate 3-2, sidewall baffle plate 3-4, web member 3-5, refractory materials 3-6, blast inlet 3-7, air bubble 3-8, wall screw 3-9;
Drive unit 4-1, opening for feed 4-2, blast inlet 4-3, air outlet 4-4, upper sprocket wheel 4-5, discharge opening 4-6, casing 4-7, lower sprocket 4-8;
Warehouse 5-1, furnace wall cooling 5-2, high-temperature flue gas entry 5-3, slag elephant trunk 5-4, heat exchange pipe laying 5-5, upper strata fluidized-bed 5-6, material pipe 5-7, slag blocking wall 5-8, the fluidized-bed 5-9 of lower floor, slag-drip opening 5-10, iron grain row mouthful 5-11, drum 5-12, low-temperature flue gas outlet 5-13, convection bank 5-14, cinder-discharging port 5-15, fluidized gas entrance 5-16, body of heater 5-17, fluidized-bed burner hearth 5-18, convective heat exchange air compartment 5-19, afterbody economizer 5-20.
Embodiment
It is hardening crack source of the gas that the present invention adopts nitrogen, and cooling transfer roller 3, high temperature sesistant bucket elevator 4 are handling equipment, and circulating fluidized bed waste heat boiler 5 is sensible heat recovery system, adopts slag gas to quench and waste heat reclaiming process.
Equipment of the present invention comprises wind quench slag ladle 1, granulation wind-tunnel 2, cooling transfer roller 3, high temperature sesistant bucket elevator 4, circulating fluidized bed waste heat boiler 5, nitrogen circulation pipeline 6, external nitrogen pipeline 7.
In figure, show, the quench slag-drip opening of slag ladle 1 of wind is connected with the slag inlet of granulation wind-tunnel 2, and granulation wind-tunnel 2 is connected with cooling transfer roller 3.Granulation wind-tunnel 2 bottoms are ramp type structure, and granulation wind-tunnel 2 end openings are connected on cooling transfer roller 3, on granulation wind-tunnel 3, weather gage are installed, and a high-temperature flue butterfly valve 12 on weather gage and high-temperature flue gas pipeline is chain.
In figure, show, the cooling transfer roller 3 being connected with granulation wind-tunnel 2 comprises bellows 3-1, grate plate 3-2, sidewall baffle plate 3-4.Cooling transfer roller 3 is divided into four sections, and every section is a bellows 3-1, and by web member, 3-5 is linked in sequence.Between adjacent bellows 3-1, be interconnected.The upper opening of bellows 3-1, grate plate 3-2 is arranged in parallel and is connected to bellows 3-1 upper opening place, and grate plate 3-2 is polylith, gapped between adjacent grate plate 3-2, and grate plate 3-2 plate face is vertical with the longitudinal axis of bellows 3-1.In grate plate 3-2 both sides, sidewall baffle plate 3-4 is installed, the lower rim of sidewall baffle plate 3-4 is connected with bellows 3-1 both sides upper limb, is beneficial to the steel slag particles being scattered to collect on grate plate 3-2.On the medial surface of the sidewall baffle plate 3-4 of grate plate 3-2 both sides, be coated with refractory materials, not damaged with guarantee equipment.Cooling nitrogen circulation blower fan 8 is arranged on bellows 3-1 outside, there is blast inlet 3-7 in bellows 3-1 side, automatic control device is learnt pressure and the flow of the required conveying source of the gas of the bed of material on bellows 3-1 by detecting the pressure of cooling nitrogen circulation blower fan 8 front and back that are connected, feed back to automatic control device, variable-frequency motor is controlled.When flow increases, when pressure is very low, illustrate that in the grate plate 2 of these bellows 3-1, bed thickness is very thin, must reduce frequency, thereby reduce energy consumption.The discharge gate of cooling transfer roller 3 is connected with the opening for feed of high temperature sesistant bucket elevator 4 by pipeline.
In figure, show, high temperature sesistant bucket elevator 4 comprises casing 4-7, drive unit 4-1, upper sprocket wheel 4-5, lower sprocket 4-8, chain, hopper.Drive unit 4-1 is arranged on casing 4-7 top platform, and upper sprocket wheel 4-5 and lower sprocket 4-8 are arranged on respectively the top and bottom of casing 4-7 inner chamber, and chain ring is around upper sprocket wheel 4-5 and lower sprocket 4-8, and hopper is arranged on chain.Opening for feed 4-2 and discharge opening 4-6 are arranged respectively at the bottom of casing 4-7 and top.Blast inlet 4-3 is arranged at casing 4-7 bottom, air outlet 4-4 is arranged at top, and chapelet cooling blower 9 is installed at blast inlet 4-3 place, and chapelet cooling blower 9 has pipeline to be connected with nitrogen circulation pipeline 6, with thinking ventilation and heat in casing 4-7, avoid accumulating heat.The discharge opening 4-6 of high temperature sesistant bucket elevator 4 is connected with circulating fluidized bed waste heat boiler 5.
In figure, show, circulating fluidized bed waste heat boiler 5 is made up of body of heater 5-17, warehouse 5-1, fluidized-bed burner hearth 5-18, convective heat exchange air compartment 5-19, afterbody economizer 5-20 tetra-parts.Warehouse 5-1 is arranged on boiler platform framework, and warehouse 5-1 bottom is connected with fluidized-bed burner hearth 5-18 by slag elephant trunk 5-4.In fluidized-bed burner hearth, 5-18 has upper strata fluidized-bed 5-6 and the fluidized-bed 5-9 of lower floor.There is heat exchange pipe laying 5-5 the top of upper strata fluidized-bed 5-6, and fluidized-bed 5-6 logical charge tube 5-7 in upper strata is connected with the fluidized-bed 5-9 of lower floor.On the fluidized-bed 5-9 of lower floor, have slag blocking wall 5-8, have abrasive grit row mouthful 5-11 in slag blocking wall 5-8 inner side, the effect of slag blocking wall 5-8 is that iron grain is blocked, and then discharges from iron grain row mouthful 5-11.There is slag-drip opening 5-10 in slag blocking wall 5-8 outside.Slag blocking wall 5-8 can block abrasive grit completely, can take so less fluidising air velocity, nitrogen usage quantity and air distribution plate resistance, and then reduces the electrisity consumption in operational process.
There is fluidized gas entrance 5-16 the below of the fluidized-bed 5-9 of lower floor, and fluidized gas entrance 5-16 installs fluidized-bed nitrogen circulation blower fan 10, and to fluidized-bed burner hearth, 5-18 blasts heat transferring medium gas, i.e. fluidized gas.Top one side of the heat exchange pipe laying 5-5 of fluidized-bed burner hearth 5-18 has high-temperature flue gas 5-3 entrance, opposite side is connected with convective heat exchange air compartment 5-19 by furnace wall cooling 5-2, in convective heat exchange air compartment 5-19, convection bank 5-14 is installed, convective heat exchange air compartment 5-19 rear portion is connected with afterbody economizer 5-20, low-temperature flue gas outlet 5-13 is arranged at the top of afterbody economizer 5-20, bottom arranges cinder-discharging port 5-15, and low-temperature flue gas outlet 5-13 is connected with nitrogen circulation pipeline 6.
In figure, show, nitrogen circulation pipeline 6 is connected with blast inlet 4-3, the fluidized gas 5-16 entrance of circulating fluidized bed waste heat boiler 5, the low-temperature flue gas outlet 5-13 of high temperature sesistant bucket elevator 4 respectively, and fluidized-bed nitrogen circulation blower fan 10, ceramic multicyclone dust collector 14 are installed in nitrogen circulation pipeline 6.
In figure, show, the high-temperature flue gas of granulation wind-tunnel 2 and cooling transfer roller 3 passes into the high-temperature flue gas entry 5-3 of circulating fluidized bed waste heat boiler 5.
Slag gas of the present invention is quenched and the method for heat recovery, and it adopts following technical process:
(1) converter high-temperature steel slag is poured onto granulation wind-tunnel 2 by the wind slag ladle 1 of quenching, and flows on the grate plate 3-2 of cooling transfer roller 3 along the inclination end opening of granulation wind-tunnel 2;
(2) cooling nitrogen circulation blower fan 8 enters the every joint bellows of cooling transfer roller 3 3-1 by nitrogen by blast inlet 3-7, then by the gap ejection between the grate plate 3-2 of upper strata, to quenching of slag and air conveying;
(3) output terminal of cooling transfer roller 3 is transported to slag by pipeline the opening for feed 4-2 of high temperature sesistant bucket elevator 4, fall into the hopper of high temperature sesistant bucket elevator 4, chain is the discharge opening 4-6 to casing 4-7 top by bunker lift, and slag is transported to the warehouse 5-1 of circular fluid bed 5 from discharge opening 4-6.
(4) when the high-temperature steel slag in circular fluid bed 5 warehouse 5-1 slips in fluidized-bed burner hearth 5-18, carry out the heat exchange of slag fluidisation, the slag blocking wall 5-8 of the fluidized-bed 5-9 of lower floor and iron grain elephant trunk are effectively collected the iron grain in slag; The furnace wall cooling 5-2 convective heat exchange of high-temperature flue gas process fluidized-bed burner hearth 5-18 simultaneously, then enter stream heat exchange air compartment 5-19 through the further heat exchange of convection bank 5-14, low-temperature flue gas is discharged; In said process, fluidized gas is to blast by fluidized gas entrance 5-16, on two-step fluidized bed with the heat exchange of high-temperature steel slag particle after, enter fluidized-bed burner hearth 5-18 and high-temperature flue gas and converge, with high-temperature flue gas continue operation; Iron grain and all the other slags are discharged from abrasive grit row mouthful 5-11 and the slag-drip opening 5-10 of fluidized-bed burner hearth 5-18 below, are transported to slag warehouse 15 and tailings warehouse 16 through handling equipment.
To quenching of slag, air conveying, promote carry, in the process of fluidisation heat exchange, nitrogen along nitrogen circulation pipeline 6 respectively with pass into the blast inlet 4-3 of high temperature sesistant bucket elevator 4, the fluidized gas entrance 5-16 of circulating fluidized bed waste heat boiler 5, and discharge from the low-temperature flue gas outlet 5-13 of circulating fluidized bed waste heat boiler 5, keep closed circulation state.
Nitrogen in external nitrogen pipeline 7 passes into by cooling nitrogen circulation blower fan 8 that granulation wind-tunnel 2 and cooling transfer roller 3 carry out that gas is quenched and is air conveying; then discharge from the high-temperature flue gas pipeline of granulation wind-tunnel 2 and cooling transfer roller 3, enter the high-temperature flue gas 5-3 entrance of circular fluid bed 5.
Claims (8)
1. a slag gas is quenched and the equipment of heat recovery, it is characterized in that: it comprises the wind slag ladle (1) of quenching, granulation wind-tunnel (2), cooling transfer roller (3), high temperature sesistant bucket elevator (4), circulating fluidized bed waste heat boiler (5), nitrogen circulation pipeline (6), external nitrogen pipeline (7), the quench slag-drip opening of slag ladle (1) of wind is connected with the slag inlet of granulation wind-tunnel (2), granulation wind-tunnel (2) is connected with cooling transfer roller (3), cooling transfer roller (3) is connected with the opening for feed of high temperature sesistant bucket elevator (4) by pipeline, the discharge opening of high temperature sesistant bucket elevator (4) is connected with the warehouse (5-1) of circulating fluidized bed waste heat boiler (5), the slag-drip opening of circulating fluidized bed waste heat boiler (5) is connected with slag warehouse (15) with tailings warehouse (16) by rotary conveyor (11), external nitrogen pipeline (7) respectively with granulation wind-tunnel (2), cooling transfer roller (3) is connected, nitrogen circulation pipeline (6) respectively with high temperature sesistant bucket elevator (4), circulating fluidized bed waste heat boiler (5) is connected.
2. slag gas according to claim 1 is quenched and the equipment of heat recovery, it is characterized in that: described cooling transfer roller (3) comprises bellows (3-1), grate plate (3-2), cooling nitrogen circulation blower fan (8), sidewall baffle plate (3-4), bellows (3-1) are rectangle closure casing, the upper opening of bellows (3-1), grate plate (3-2) is arranged in parallel and is connected to bellows (3-1) upper opening place, grate plate (3-2) is polylith, gapped between adjacent grate plate (3-2), grate plate (3-2) plate face is vertical with the longitudinal axis of bellows (3-1), cooling nitrogen circulation blower fan (8) is arranged on bellows (3-1) outside, there is blast inlet (3-7) in bellows (3-1) side, cooling nitrogen circulation blower fan (8) outlet is connected with blast inlet (3-7), in grate plate (3-2) both sides, sidewall baffle plate (3-4) is installed, on the medial surface of sidewall baffle plate (3-4), be coated with refractory materials (3-6), cooling nitrogen circulation blower fan (8) is connected with automatic control device.
3. slag gas according to claim 2 is quenched and the equipment of heat recovery, described high temperature sesistant bucket elevator (4) comprises casing (4-7), drive unit (4-1), upper sprocket wheel (4-5), lower sprocket (4-8), chain, hopper, drive unit (4-1) is arranged on casing (4-7) top platform, upper sprocket wheel (4-5) and lower sprocket (4-8) are arranged on respectively the top and bottom of casing (4-7) inner chamber, chain ring is around upper sprocket wheel (4-5) and lower sprocket (4-8), hopper is arranged on chain, opening for feed (4-2) and discharge opening (4-6) are arranged respectively at the bottom of casing (4-7) and top, it is characterized in that: increase and have blast inlet (4-3) in the bottom of casing (4-7), increase and have air outlet (4-4) on top, locate to install a chapelet cooling blower (9) at blast inlet (4-3), chapelet cooling blower (9) has pipeline to be connected with nitrogen circulation pipeline (6).
4. slag gas according to claim 3 is quenched and the equipment of heat recovery, it is characterized in that:
Described circulating fluidized bed waste heat boiler (5) is by body of heater (5-17), warehouse (5-1), fluidized-bed burner hearth (5-18), convective heat exchange air compartment (5-19), afterbody economizer (5-20) composition, warehouse (5-1) skin is Steel Sheel, build by laying bricks or stones for flame-proof thermal insulation material the inside, warehouse (5-1) is arranged on boiler platform framework, warehouse (5-1) bottom is connected with the upper strata fluidized-bed (5-6) of fluidized-bed burner hearth (5-18) by slag elephant trunk (5-4), there is heat exchange pipe laying (5-5) top of upper strata fluidized-bed (5-6), the logical charge tube (5-7) of upper strata fluidized-bed (5-6) is connected with lower floor fluidized-bed (5-9), on lower floor's fluidized-bed (5-9), there is slag blocking wall (5-8), there is abrasive grit row mouthful (5-11) in slag blocking wall (5-8) inner side, there is slag-drip opening (5-10) in slag blocking wall (5-8) outside, there is fluidized gas entrance (5-16) below of lower floor's fluidized-bed (5-9), top one side of fluidized-bed burner hearth (5-18) heat exchange pipe laying (5-5) has high-temperature flue gas entry (5-3), opposite side is connected with convective heat exchange air compartment (5-19) by furnace wall cooling (5-2), convection bank (5-14) is installed in convective heat exchange air compartment (5-19), convective heat exchange air compartment (5-19) rear portion is connected with afterbody economizer (5-20), low-temperature flue gas outlet (5-13) is arranged at the top of afterbody economizer (5-20), bottom arranges cinder-discharging port (5-15).
5. slag gas according to claim 4 is quenched and the equipment of heat recovery, it is characterized in that: described nitrogen circulation pipeline (6) is connected with blast inlet, the fluidized gas entrance (5-16) of circulating fluidized bed waste heat boiler (5), the low-temperature flue gas outlet (5-13) of high temperature sesistant bucket elevator (4) respectively, and fluidized-bed nitrogen circulation blower fan (10), ceramic multicyclone dust collector (14) are installed in nitrogen circulation pipeline (6).
6. slag gas according to claim 5 is quenched and the equipment of heat recovery, it is characterized in that: described granulation wind-tunnel (2) and the high-temperature flue gas pipeline of cooling transfer roller (3) and the high-temperature flue gas entry (5-3) of circulating fluidized bed waste heat boiler (5) are connected.
7. utilize slag gas described in claim 1-6 any one to quench and the equipment of heat recovery is implemented slag gas is quenched and a method for heat recovery, it is characterized in that: it adopts following technical process:
A. converter high-temperature steel slag is poured onto granulation wind-tunnel (2) by the wind slag ladle (1) of quenching, and flows in the grate plate (3-2) of cooling transfer roller (3) along the inclination end opening of granulation wind-tunnel (2);
B. cooling nitrogen circulation blower fan (8) enters the every joint bellows of cooling transfer roller (3) (3-1) by nitrogen by blast inlet (3-7), then by the gap ejection between upper strata grate plate (3-2), to quenching of slag and air conveying;
C. the output terminal of cooling transfer roller (3) is transported to slag by pipeline the opening for feed (4-2) of high temperature sesistant bucket elevator (4), fall into the hopper of high temperature sesistant bucket elevator (4), chain is the discharge opening (4-6) to casing (4-7) top by bunker lift, and slag is transported to the warehouse (5-1) of circular fluid bed (5) from discharge opening (4-6);
D. the high-temperature steel slag in the warehouse (5-1) of circular fluid bed (5) slips to fluidized-bed burner hearth (5-18) and carries out the heat exchange of slag fluidisation when interior, and slag blocking wall (5-8) and the iron grain elephant trunk of lower floor's fluidized-bed (5-9) are effectively collected the iron grain in slag; Furnace wall cooling (5-2) convective heat exchange of high-temperature flue gas process fluidized-bed burner hearth (5-18) simultaneously, then enter stream heat exchange air compartment (5-19) through further heat exchange of convection bank (5-14), low-temperature flue gas is discharged; In said process, fluidized gas is to blast by fluidized gas entrance (5-16), on two-step fluidized bed with the heat exchange of high-temperature steel slag particle after, enter fluidized-bed burner hearth (5-18) and high-temperature flue gas and converge, continue operation with high-temperature flue gas; Iron grain and all the other slags are discharged from abrasive grit row mouthful (5-11) and the slag-drip opening (5-10) of fluidized-bed burner hearth (5-18) below, are transported to slag warehouse (15) and tailings warehouse (16) through rotary conveyor (11).
8. slag gas according to claim 7 is quenched and the method for heat recovery, it is characterized in that: to quenching of slag, air conveying, promote carry, in the process of fluidisation heat exchange, nitrogen along nitrogen circulation pipeline (6) respectively with pass into the blast inlet (4-3) of high temperature sesistant bucket elevator (4), the fluidized gas entrance (5-16) of circulating fluidized bed waste heat boiler (5), and discharge from the low-temperature flue gas outlet (5-13) of circulating fluidized bed waste heat boiler (5), keep closed circulation state; Nitrogen in external nitrogen pipeline (7) passes into by cooling nitrogen circulation blower fan (8) that granulation wind-tunnel (2) and cooling transfer roller (3) carry out that gas is quenched and is air conveying; then discharge from the high-temperature flue gas pipeline of granulation wind-tunnel (2) and cooling transfer roller (3), enter the high-temperature flue gas entry (5-3) of circular fluid bed (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210387654.5A CN102952908B (en) | 2012-10-15 | 2012-10-15 | Equipment and method for steel slag air quenching and waste heat recycling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210387654.5A CN102952908B (en) | 2012-10-15 | 2012-10-15 | Equipment and method for steel slag air quenching and waste heat recycling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102952908A CN102952908A (en) | 2013-03-06 |
| CN102952908B true CN102952908B (en) | 2014-07-30 |
Family
ID=47762287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210387654.5A Active CN102952908B (en) | 2012-10-15 | 2012-10-15 | Equipment and method for steel slag air quenching and waste heat recycling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102952908B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170097123A (en) | 2014-12-19 | 2017-08-25 | 해치 리미티드 | Methods and apparatus for metal recovery from slag |
| CN110863070B (en) * | 2019-12-09 | 2023-05-05 | 中冶节能环保有限责任公司 | Test device and test method for recycling waste heat of steel slag |
| CN111471817A (en) * | 2020-04-24 | 2020-07-31 | 河钢股份有限公司 | Gas quenching method for improving stability of steel slag and recovering physical heat of molten steel slag |
| CN111637446A (en) * | 2020-06-09 | 2020-09-08 | 长沙有色冶金设计研究院有限公司 | Melt fluidization cold shock device and application system and system application method thereof |
| CN111518971A (en) * | 2020-06-30 | 2020-08-11 | 河北思莱格环境科技有限公司 | High-temperature metallurgical slag environment cleaning, heat taking and dry processing system and process |
| CN112501381A (en) * | 2020-11-10 | 2021-03-16 | 黄涛 | Continuous periodic timing feeding mechanism for raw materials for steelmaking |
| CN113430307B (en) * | 2021-06-04 | 2022-08-19 | 刘春茗 | Liquid steel slag dry processing device and working mode thereof |
| CN113789417A (en) * | 2021-09-28 | 2021-12-14 | 北京中航天业科技有限公司 | Atomization treatment device and treatment method for liquid steel slag |
| CN114854911B (en) * | 2022-04-22 | 2023-11-24 | 南京迎信技术有限公司 | Device and method for utilizing heat energy of high-temperature steel slag |
| CN115094168B (en) * | 2022-06-02 | 2024-02-20 | 中节能工业节能有限公司 | Slag recovery system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413037A (en) * | 2008-11-28 | 2009-04-22 | 首钢总公司 | Method for recovery of waste heat of steel slag and comprehensively processing and utilizing steel slag |
| CN101476000A (en) * | 2009-01-16 | 2009-07-08 | 首钢总公司 | Thermal state steel slag waste heat recovery system and recovery method |
| CN101551199A (en) * | 2009-04-13 | 2009-10-07 | 杭州锅炉集团股份有限公司 | Recovery method of steel slag residual heat and system thereof |
| CN202945250U (en) * | 2012-10-15 | 2013-05-22 | 唐山钢铁国际工程技术有限公司 | Steel slag air quenching and waste heat recycling equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010235323A (en) * | 2009-03-30 | 2010-10-21 | Jfe Steel Corp | Method of recovering heat energy of slag |
-
2012
- 2012-10-15 CN CN201210387654.5A patent/CN102952908B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413037A (en) * | 2008-11-28 | 2009-04-22 | 首钢总公司 | Method for recovery of waste heat of steel slag and comprehensively processing and utilizing steel slag |
| CN101476000A (en) * | 2009-01-16 | 2009-07-08 | 首钢总公司 | Thermal state steel slag waste heat recovery system and recovery method |
| CN101551199A (en) * | 2009-04-13 | 2009-10-07 | 杭州锅炉集团股份有限公司 | Recovery method of steel slag residual heat and system thereof |
| CN202945250U (en) * | 2012-10-15 | 2013-05-22 | 唐山钢铁国际工程技术有限公司 | Steel slag air quenching and waste heat recycling equipment |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2010-235323A 2010.10.21 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102952908A (en) | 2013-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102952908B (en) | Equipment and method for steel slag air quenching and waste heat recycling | |
| CN202945250U (en) | Steel slag air quenching and waste heat recycling equipment | |
| WO2017152784A1 (en) | System and method for dry centrifugal granulation of high_temperature liquid slag and exhaust heat recovery | |
| CN105112577B (en) | Dry granulating blast furnace slag waste heat recovery device and blast furnace slag waste heat recovery method | |
| CN203080030U (en) | Ring type roaster | |
| CN205014851U (en) | Sintering deposit shows heat reclamation device | |
| CN202465830U (en) | Residual heat reclaiming system for pellets and sintered ores | |
| CN106556258A (en) | Sintering mine sensible heat retracting device and its using method | |
| CN105441687A (en) | Dust recycling process and system for iron and steel plant | |
| CN105066718B (en) | Comprehensive utilization system for sintering waste heat | |
| CN109425231B (en) | Air draft type circulating cooling system and process for sinter | |
| CN105021049A (en) | Vertical cooling tower and sintering waste heat comprehensive utilization system | |
| CN106111889A (en) | A kind of new type high temperature reclaimed sand cooling system and exhaust heat recovering method | |
| CN103776270A (en) | Calcium carbide sensible heat recovery equipment and method for calcium carbide furnace | |
| CN104073578A (en) | Dry sensible heat recycling system and method for blast furnace slag | |
| CN105463140B (en) | A kind of high-temperature slag handles recovery system | |
| CN101329140A (en) | Facilities for high effectively utilizing acetylene stones sensible heat | |
| CN213537806U (en) | Coke dry quenching coke loading system | |
| CN101805811B (en) | Method and device for smelting iron by using pure-oxygen and hydrogen-rich gas | |
| CN110631378B (en) | Vertical preheater | |
| CN205448721U (en) | Hot DRI cooling device of rotary hearth furnace | |
| CN204923908U (en) | System is used multipurposely to sintering cooling tower and sintering waste heat | |
| CN209468470U (en) | A kind of device using hot steel slag waste heat baking alloy | |
| CN103776271A (en) | Calcium carbide sensible heat recovery equipment for calcium carbide furnace | |
| CN203798180U (en) | Calcium carbide furnace calcium carbide sensible heat recovery device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 063000 Hebei province Tangshan City Jianhua West Road No. 1 Patentee after: Tangshan iron and steel international engineering Limited by Share Ltd Address before: 063000 Hebei province Tangshan City Jianhua West Road No. 1 Patentee before: Tangshan Iron & Steel International Engineering Technology Co., Ltd. |
|
| CP03 | Change of name, title or address |
Address after: No. 1 Jianhua Road, North District of Tangshan City Road, Hebei Province, Hebei Patentee after: International Engineering Technology Limited by Share Ltd of Tangshan Iron and Steel Company Address before: 063000 Jianhua West Road, Tangshan City, Hebei Province, No. 1 Patentee before: Tangshan iron and steel international engineering Limited by Share Ltd |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 063000 No. 599, Ronghua West Road, Lubei District, Tangshan City, Hebei Province Patentee after: Tanggang International Engineering Technology Co.,Ltd. Address before: No. 1 Jianhua Road, North District of Tangshan City Road, Hebei Province, Hebei Patentee before: TANGSTEEL INTERNATIONAL ENGINEERING TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address |