CN113718070A - CO2Steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system - Google Patents
CO2Steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system Download PDFInfo
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- CN113718070A CN113718070A CN202111159952.4A CN202111159952A CN113718070A CN 113718070 A CN113718070 A CN 113718070A CN 202111159952 A CN202111159952 A CN 202111159952A CN 113718070 A CN113718070 A CN 113718070A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
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- 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
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/04—Specific shape of slag after cooling
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- 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
- C21B2400/068—Receptacle features where the slag is treated with a sealed or controlled environment
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- 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
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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
- 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
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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
- 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
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- Manufacturing & Machinery (AREA)
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- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
CO (carbon monoxide)2The system comprises a rolling crushed steel slag granulation device, a quenching fan, a slag conveyer for conveying granulated steel slag materials, a steel slag screening device, a CO waste heat recovery system2Adsorption fluidized bed conveyer for retrieve the exhaust-heat boiler of flue gas waste heat and steam production, the one-level dust remover, the draught fan that is connected with the one-level dust remover through the flue, be connected with the draught fan through the flue, be arranged in getting rid of the condensation water trap of moisture in the flue gas, be connected with condensation water trap through the flue, be arranged in getting rid of the second grade dust remover of particulate matter in the flue gas, the chimney that is connected with the second grade dust remover through the flue. The invention has the advantages of high-efficiency granulation and stabilization of the steel slag, high-efficiency recovery of waste heat of the steel slag, carbon fixation, less water consumption, no waste water discharge, stable steam pressure flow, standard discharge of waste gas, reduction of the consumption of quenching air and prevention of steel slag adhesion. Can be widely appliedThe method is used for steel slag solid waste treatment, waste heat recovery and comprehensive utilization of steel plants.
Description
Technical Field
The invention relates to CO2Steam-water combined quenching steel slag coupling carbon fixation and pressure hot disintegrating wasteThe heat recovery system can be widely applied to steel slag solid waste treatment, waste heat recovery and comprehensive utilization in steel plants.
Background
The steel slag is a byproduct in the steel making process, the steel slag yield is huge in the steel production process, in 2020, the Chinese steel yield is the first global and is 10.65 hundred million tons, and accounts for 56.7 percent of the global steel yield, wherein the steel slag yield is about 1.6 hundred million tons. The steel slag contains a large amount of heat resources, and the sensible heat of 1.2GJ recoverable by each ton of steel slag is calculated, which is about equivalent to the heat generated after 41kg of standard coal is completely combusted. As one of the industries with the most carbon emission in China, the iron and steel industry is actively promoted to reduce total energy consumption and total emission in recent years, and a series of policies specially aiming at energy conservation and emission reduction of the iron and steel industry are developed.
The existing steel slag treatment methods comprise a hot splashing method, a disc splashing method, a hot braising method, a water quenching method, a roller method, an air quenching method, a granulation wheel method and the like. The hot splashing method, the hot stewing method and the water quenching method are widely applied due to simple process and less investment, but have the problems of serious unorganized emission, waste heat resource waste and poor steel slag stability.
Disclosure of Invention
The invention aims to provide CO which is used for efficiently granulating and stabilizing steel slag, efficiently recovering waste heat of the steel slag, fixing carbon, using less water, discharging no waste water, ensuring stable steam pressure flow, discharging waste gas up to the standard, reducing the consumption of quenching air and preventing the steel slag from being adhered2Steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system.
To achieve the above object, the CO of the present invention2The system comprises a rolling crushed steel slag granulating device, a quenching fan, a slag conveyer, a steel slag sieving device, a pressure hot disintegration waste heat recovery system and a waste heat recovery system, wherein the upper parts of the left side surface and the right side surface are respectively provided with a quenching air inlet, a hot air outlet and a steel slag inlet, the quenching fan is connected with the quenching air inlet through an air pipeline and is used for conveying quenching air, the slag conveyer is arranged below the rolling crushed steel slag granulating device and is used for conveying granulated steel slag materials, the steel slag sieving device is arranged below a steel slag material outlet of the slag conveyer and is used for separating the thickness of steel slag, and the position of the steel slag sieving device is positioned below the steel slag material outlet of the slag conveyerAt the bottom of the steel slag screening device, not only the steel slag is mixed with CO2The air supply pipeline is connected with the quenching fan through a pipeline and is used for cooling and conveying fine steel slag and fixing CO2CO of2An adsorption fluidized bed conveyer installed at the CO2A slag bin for storing steel slag at the lower end of a material conveying outlet of the adsorption fluidized bed conveyor, which is connected with a hot air outlet of the rolled broken steel slag granulating device through a flue and connected with CO through a flue gas pipeline2Adsorb fluidized bed conveyer high temperature exhanst gas outlet and be connected, a exhaust-heat boiler for retrieving the flue gas waste heat and producing steam, be connected with exhaust-heat boiler through the flue, a one-level dust remover for slag coarse segregation, the draught fan that is connected with the one-level dust remover through the flue, be connected with the draught fan through the flue, a condensation water trap for getting rid of moisture in the flue gas, be connected with condensation water trap through the flue, a second grade dust remover for getting rid of particulate matter in the flue gas, the chimney that is connected with the second grade dust remover through the flue.
CO of the invention2The system comprises a steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system, and further comprises a steel slag transfer device arranged at the bottom of the steel slag screening device and used for receiving, transporting, loading and unloading coarse steel slag, wherein the pressure hot stuffiness tank is connected with the steel slag transfer device through a coarse steel slag conveying pipeline, is used for stabilizing the coarse steel slag and can generate steam for steam users to use.
CO of the invention2The system further comprises a heat accumulator which is connected with a waste heat boiler through a steam pipeline and is used for steam users to use steam.
CO of the invention2The heat accumulator is a container with water at the bottom and steam at the top, can absorb redundant steam when the steam generation amount of a steam drum is greater than the steam consumption of a steam user, and can release steam when the steam generation amount of the steam drum is less than the steam consumption of the steam user.
CO of the invention2The system for carbon fixation and pressure hot stuffiness waste heat recovery by steam-water combined quenching steel slag coupling, and CO2An adsorption fluidized bed conveyer is arranged on the bottom of the adsorption fluidized bed,the cooling air chamber is arranged below the steel slag conveying belt, and cooling air can penetrate through the steel slag conveying belt to cool the steel slag.
CO of the invention2The steel slag coupled carbon fixation and pressure hot disintegration waste heat recovery system comprises a shell, a steel slag rolling crushing roller, a slag pushing device, a large slag spraying device, a quenching water nozzle and a water spray cooling device, wherein the steel slag rolling crushing roller is located below a steel slag input port, is installed on the side face of the inner lower part of the shell and is used for pushing large slag to move horizontally and reciprocally, the large slag spraying device is located above the slag pushing device and is installed on the inner wall of the shell and used for rapidly cooling the large slag, the quenching water nozzle is installed on the inner wall of the shell, is arranged along the periphery of a quenching air inlet and can spray atomized water by utilizing quenching air, and the water spray cooling device is installed on the inner wall above the shell and is used for spraying the atomized water.
CO of the invention2The system for carbon fixation and pressure hot stuffiness waste heat recovery by steam-water combined quenching steel slag coupling, and CO2The adsorption fluidized bed conveyer is provided with a cooling air port and a plurality of independent air chambers, and the air volume of each air chamber is adjustable.
CO of the invention2The system for carbon fixation and pressure hot stuffiness waste heat recovery by steam-water combined quenching steel slag coupling, and CO2The adsorption fluidized bed conveyor, the cooling tuyere and the CO2The air supply pipeline is connected with the input port of the secondary dust remover flue.
CO of the invention2The primary dust remover is a cyclone dust remover.
CO of the invention2The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that the secondary dust remover is a wet-type electric dust remover.
CO of the invention2The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system, the coldThe condensation water device is a device for reducing the content of water vapor in flue gas by a cooling condensation method, and the preferred type is a spray tower.
CO of the invention2The steam-water combined quenched steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that a quenched air inlet obliquely and upwards enters air, and the included angle alpha between the quenched air inlet and the horizontal direction is 0-45 degrees.
CO of the invention2The water-steam combined quenched steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that a quenched air inlet obliquely upwards supplies air, so that quenched air entering a rolling crushed steel slag granulating device obliquely upwards divides the quenched steel slag into upward speeds, the air residence time is prolonged, and the heat exchange effect is enhanced.
CO of the invention2The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system has the following steel slag flow principle: the steel slag uniformly flows into the quenching chamber through the steel slag input port of the upper rolling crushing steel slag granulating device, the steel slag with good fluidity is crushed into fine steel slag liquid beads under the impact of quenching air from the quenching fan and is cooled by the quenching air, and the water spraying cooling device ensures that the steel slag liquid beads are solid before falling to the slag conveyor. The steel slag or the large steel slag with poor fluidity is rapidly cooled after being sprayed with water by the large slag spraying device, part of slag blocks are cracked by water in the process, the slag is sent to the steel slag grinding and crushing roller through the slag pushing device to be crushed, and the steel slag is crushed and cooled and then is conveyed to the slag conveyor. All steel slag falls into a steel slag screening device through a slag conveyor, and fine steel slag falls into CO2On an adsorption fluidized bed conveyor, along with CO2The adsorption fluidized bed conveyer moves and is in high temperature, high humidity and CO2The steel slag mainly undergoes the following reactions under the environment: CaO + H2O→Ca(OH)2，Ca(OH)2+CO2→CaCO3+H2O，MgO+H2O→Mg(OH)2，Mg(OH)2+CO2→MgCO3+H2And O, improving the stability of the steel slag, reducing the temperature, falling into a steel slag bin, and transporting away by a slag transport vehicle. The crude steel slag is sent to a pressure heat stifled tank through a steel slag transfer device for stabilization treatment and steam generation.
CO of the invention2Steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system, the flue gas flow principle is as follows: the low-temperature saturated wet flue gas dehydrated by the condensation dehydration device is divided into three paths, and the first path of flue gas is dedusted by a secondary deduster and then discharged out through a chimney; the second path of flue gas enters a quenching air inlet after being pressurized by a quenching fan, quenching water is atomized by the quenching air at the quenching air inlet to form an air-water mixture, and when the quenching water meets liquid steel slag, the steel slag can be rapidly cooled, rapidly granulated and solidified and simultaneously changed into high-temperature quenching air, and the high-temperature quenching air leaves the rolling and crushing steel slag granulating device through a hot air outlet; third path of flue gas and CO2Make up gas of CO coming from pipeline2After mixing, the gas enters into CO2The mixed gas absorbs the heat of the steel slag and reacts with the steel slag to form CO2Is solidified and the temperature of the flue gas is increased. High-temperature quenching air and CO at hot air outlet of rolling crushed steel slag granulating device2Mixing high-temperature flue gas at the outlet of the adsorption fluidized bed conveyor, cooling the mixed gas in a waste heat boiler, and returning the cooled gas to the condensation and water removal device again after the gas is dedusted by a primary deduster.
CO of the invention2The system comprises a steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system, water quenching wind carried by the system is used as steel slag granulating power with good fluidity, a water spray quenching and steel slag rolling crushing roller is used as crushing power of steel slag or large steel slag with poor fluidity, and CO-containing waste heat recovery system2Gas is used as steel slag waste heat recovery cycle working medium, a waste heat boiler is used as a steel slag waste heat recovery device, and CO is used2The adsorption fluidized bed conveyor is used as a device for recovering, fixing carbon, stabilizing and conveying the heat of the fine steel slag, a pressure-heating blank tank is used as a device for recovering and stabilizing the heat of the coarse steel slag, a heat accumulator is used as a load buffer device, the high-efficiency granulation and stabilization of the steel slag, the high-efficiency recovery of the waste heat of the steel slag, the carbon fixation, the water consumption, the discharge of no waste water, the flow of steam pressure and the discharge of waste gas reaching the standard are realized.
CO of the invention2The quenching air can atomize quenching water to enable the quenching water to become a gas-water mixture, and huge latent heat of vaporization of liquid water can rapidly cool steel when the quenching air meets the liquid steel slag with low viscositySlag, which makes the steel slag quickly solidified and granulated and achieves the purpose of reducing the amount of quenching air.
CO of the invention2The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that the water spray cooling device can spray atomized water to rapidly cool quenched steel slag, so that the steel slag is in a solid state before falling down, and the steel slag is prevented from being adhered.
CO of the invention2The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that the condensation water removal device reduces the content of steam in flue gas by a cooling condensation method.
CO of the invention2The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that a steam user can be an industrial user, and can also be a resident user of heating and air conditioning.
CO of the invention2The system for carbon fixation and pressure hot stuffiness waste heat recovery by steam-water combined quenching steel slag coupling, and CO2Make up CO in gas pipeline2The gas, which may be pure CO2Gases or containing CO2The flue gas of (1).
In summary, the CO of the present invention2The steam-water combined quenching steel slag coupling carbon fixation and pressure hot disintegration waste heat recovery system has the advantages of efficient granulation and stabilization of the steel slag, efficient recovery of the waste heat of the steel slag, carbon fixation, less water consumption, no wastewater discharge, stable steam pressure flow, standard discharge of waste gas, reduction of the consumption of quenching air and prevention of steel slag adhesion.
Drawings
The invention will be further described with reference to the accompanying drawings and examples thereof.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In FIG. 1, the CO of the present invention2A system for coupling and carbon fixation of steam-water combined quenched steel slag and pressure hot stuffiness waste heat recovery comprises a rolling crushed steel slag granulating device 1, a quenching fan 2 and a pressure hot stuffiness waste heat recovery device, wherein the upper parts of the left side surface and the right side surface are respectively provided with a quenching air inlet a, a hot air outlet b and a steel slag inlet c, the quenching fan 2 is connected with the quenching air inlet channel through an air pipeline and is used for conveying quenching air, and the rolling crushed steel slag granules are positionedA slag conveyer 3 which is arranged below the device and used for conveying granulated steel slag materials, a steel slag sieving device 4 which is arranged below the steel slag material output port of the slag conveyer and used for separating the thickness of steel slag, and a CO separating device which is arranged at the bottom of the steel slag sieving device2The air supply pipeline 13 is connected with the quenching fan through a pipeline and is used for cooling and conveying fine steel slag and fixing CO2CO of2An adsorption fluidized bed conveyor 5 installed on the CO2A slag bin 6 for storing steel slag at the lower end of a material conveying outlet of the adsorption fluidized bed conveyor, which is connected with a hot air outlet of the rolled broken steel slag granulating device through a flue and connected with CO through a flue gas pipeline2The high-temperature flue gas outlet of the adsorption fluidized bed conveyor is connected, a waste heat boiler 7 is used for recovering flue gas waste heat and generating steam, the high-temperature flue gas outlet is connected with the waste heat boiler through a flue, a primary dust remover 8 is used for coarse separation of steel slag, a draught fan 9 is connected with the primary dust remover through the flue, the draught fan is connected with the flue, a condensation dewatering device 10 is used for removing moisture in the flue gas, the high-temperature flue gas outlet is connected with the condensation dewatering device through the flue, a secondary dust remover 11 is used for removing particles in the flue gas, and a chimney 12 is connected with the secondary dust remover through the flue.
CO of the invention2The system comprises a steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffy waste heat recovery system, and further comprises a steel slag transfer device 14 arranged at the bottom of the steel slag screening device and used for receiving, transporting, loading and unloading coarse steel slag, and a pressure hot stuffy tank 15 which is connected with the steel slag transfer device through a coarse steel slag conveying pipeline, used for stabilizing the coarse steel slag and capable of generating steam for a steam user d to use.
CO of the invention2The system comprises a steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system, and further comprises a heat accumulator 16 which is connected with a waste heat boiler through a steam pipeline and is used for steam users to use steam.
CO of the invention2The heat accumulator is a container with water at the bottom and steam at the top, can absorb redundant steam when the steam yield of a steam drum is greater than the steam consumption of a steam user f, and can absorb redundant steam when the steam yield of the steam drum is less than the steam consumption of the steam user fReleasing the steam.
CO of the invention2The system for carbon fixation and pressure hot stuffiness waste heat recovery by steam-water combined quenching steel slag coupling, and CO2The adsorption fluidized bed conveyor comprises a chain wheel 17 arranged on a frame 19, a steel slag conveyer belt 18 driven by the chain wheel and arranged obliquely, steel slag to be cooled is positioned above the steel slag conveyer belt, an air chamber is arranged below the steel slag conveyer belt, and cooling air can penetrate through the steel slag conveyer belt to cool the steel slag.
CO of the invention2The system comprises a steam-water combined quenched steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system, a rolling crushed steel slag granulating device 1, a steel slag rolling crushing roller 1-2 which is positioned below a steel slag input port, is arranged on the side surface of the lower part of the inner part of a shell and is used for crushing large slag through rotary kinetic energy, a pressure reducing crushing roller which is positioned below the steel slag input port, is close to the steel slag rolling crushing roller and is arranged on the side surface of the lower part of the inner part of the shell, the slag pushing device 1-3 is used for pushing large slag to move in a horizontal reciprocating mode, the large slag spraying device 1-4 is located above the slag pushing device and mounted on the inner wall of the shell and used for carrying out sharp quenching on the large slag, the quenching water nozzles 1-5 are mounted on the inner wall of the shell, are arranged along the periphery of a quenching air inlet and can spray atomized water by utilizing quenching air, and the water spraying cooling device 1-6 is mounted on the inner wall above the shell and used for spraying the atomized water.
CO of the invention2The system for carbon fixation and pressure hot stuffiness waste heat recovery by steam-water combined quenching steel slag coupling, and CO2The adsorption fluidized bed conveyer is provided with a cooling air port e and a plurality of independent air chambers, and the air volume of each air chamber is adjustable.
CO of the invention2The system for carbon fixation and pressure hot stuffiness waste heat recovery by steam-water combined quenching steel slag coupling, and CO2The adsorption fluidized bed conveyor, the cooling tuyere and the CO2The air supply pipeline is connected with the input port of the secondary dust remover flue.
CO of the invention2The primary dust remover is a cyclone dust remover.
CO of the invention2The steel slag coupling carbon fixation by steam-water combined quenching and the processThe pressure-heating stuffy waste heat recovery system is characterized in that the secondary dust remover is a wet-type electric dust remover.
CO of the invention2The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that the condensation dewatering device is equipment for reducing the content of steam in flue gas by a cooling condensation method, and the preferred type is a spray tower.
CO of the invention2The steam-water combined quenched steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that a quenched air inlet obliquely and upwards enters air, and the included angle alpha between the quenched air inlet and the horizontal direction is 0-45 degrees.
In view of the foregoing, it is intended that the present invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims; any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention by those skilled in the art can be made without departing from the technical scope of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (12)
1. CO (carbon monoxide)2The system is characterized by comprising a rolling crushed steel slag granulating device, a quenching fan, a slag conveying machine, a steel slag sieving device and a CO screening device, wherein the upper parts of the left side surface and the right side surface are respectively provided with a quenching air inlet, a hot air outlet and a steel slag inlet, the quenching fan is connected with the quenching air inlet through an air pipeline and is used for conveying quenching air, the slag conveying machine is arranged below the rolling crushed steel slag granulating device and is used for conveying granulated steel slag materials, the steel slag sieving device is arranged below a steel slag material output port of the slag conveying machine and is used for separating the thickness of steel slag, and the steel slag sieving device is arranged at the bottom of the steel slag sieving device and is not only connected with the CO screening device but also used for separating the thickness of the steel slag2The air supply pipeline is connected with the quenching fan through a pipeline and is used for cooling and conveying fine steel slag and fixing CO2CO of2An adsorption fluidized bed conveyer installed at the CO2A slag bin for storing steel slag at the lower end of a material conveying outlet of the adsorption fluidized bed conveyor, and hot air passing through a flue and a rolled broken steel slag granulating deviceThe outlet is connected with CO through a flue gas pipeline2Adsorb fluidized bed conveyer high temperature exhanst gas outlet and be connected, a exhaust-heat boiler for retrieving the flue gas waste heat and producing steam, be connected with exhaust-heat boiler through the flue, a one-level dust remover for slag coarse segregation, the draught fan that is connected with the one-level dust remover through the flue, be connected with the draught fan through the flue, a condensation water trap for getting rid of moisture in the flue gas, be connected with condensation water trap through the flue, a second grade dust remover for getting rid of particulate matter in the flue gas, the chimney that is connected with the second grade dust remover through the flue.
2. CO according to claim 12The system is characterized by further comprising a steel slag transfer device arranged at the bottom of the steel slag screening device and used for receiving, transporting, loading and unloading the coarse steel slag, and a pressure-hot stuffy tank which is connected with the steel slag transfer device through a coarse steel slag conveying pipeline, used for stabilizing the coarse steel slag and capable of generating steam for steam users to use.
3. CO according to claim 12The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized by further comprising a heat accumulator which is connected with a waste heat boiler through a steam pipeline and is used for steam users to use steam.
4. CO according to claim 32The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that the heat accumulator is a container with water at the bottom and steam at the top, can absorb redundant steam when the steam generation amount of a steam drum is greater than the steam consumption amount of a steam user, and can release steam when the steam generation amount of the steam drum is less than the steam consumption amount of the steam user.
5. CO according to claim 12The system for coupling and carbon fixation and pressure hot stuffiness waste heat recovery of steam-water combined quenched steel slag is characterized in that CO2An adsorption fluidized bed conveyor comprisesThe cooling air chamber is arranged below the steel slag conveying belt, and cooling air can penetrate through the steel slag conveying belt to cool the steel slag.
6. CO according to claim 12The system is characterized by comprising a shell, a steel slag grinding and crushing roller, a slag pushing device, a large slag spraying device, a quenching water nozzle and a water spray cooling device, wherein the steel slag grinding and crushing roller is located below a steel slag input port, is installed on the side surface of the lower part inside the shell and is used for crushing large slag through rotational kinetic energy, the large slag spraying device is located below the steel slag input port, is close to the steel slag grinding and crushing roller, is installed on the side surface of the lower part inside the shell and is used for pushing the large slag to move horizontally in a reciprocating mode, the large slag spraying device is located above the slag pushing device and is installed on the inner wall of the shell and used for rapidly cooling the large slag, the quenching water nozzle is installed on the inner wall of the shell, is arranged along the periphery of a quenching air inlet and can spray atomized water by utilizing quenching air, and the water spray cooling device is installed on the inner wall above the shell and is used for spraying atomized water.
7. CO according to claim 12The system for coupling and carbon fixation and pressure hot stuffiness waste heat recovery of steam-water combined quenched steel slag is characterized in that CO2The adsorption fluidized bed conveyer is provided with a cooling air port and a plurality of independent air chambers, and the air volume of each air chamber is adjustable.
8. CO according to claim 72The system is characterized in that the cooling air port is not only connected with CO, but also connected with the hot-disintegrating waste heat recovery system under pressure2The air supply pipeline is connected with the input port of the secondary dust remover flue.
9. CO according to claim 12The system is characterized in that the primary dust remover is a cyclone dust remover.
10. CO according to claim 12The steam-water combined quenching steel slag coupling carbon fixation and pressure hot stuffiness waste heat recovery system is characterized in that the secondary dust remover is a wet-type electric dust remover.
11. CO according to claim 12The system is characterized in that the condensation dewatering device is equipment for reducing the content of water vapor in flue gas by a cooling condensation method, and the preferred type is a spray tower.
12. CO according to claim 12The system is characterized in that a quenching air inlet obliquely and upwards enters air, and the included angle alpha between the quenching air inlet and the horizontal direction is 0-45 degrees.
Priority Applications (1)
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| CN114875185A (en) * | 2022-06-15 | 2022-08-09 | 西安康桥能源技术有限责任公司 | With CO 2 Blast furnace slag waste heat recovery device and method as heat carrier |
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