CN106521069A - System and method for coupling reduction ironmaking of garbage disposal - Google Patents
System and method for coupling reduction ironmaking of garbage disposal Download PDFInfo
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- CN106521069A CN106521069A CN201611151948.2A CN201611151948A CN106521069A CN 106521069 A CN106521069 A CN 106521069A CN 201611151948 A CN201611151948 A CN 201611151948A CN 106521069 A CN106521069 A CN 106521069A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/30—Other processes in rotary ovens or retorts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
-
- 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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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Combustion & Propulsion (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a system and a method for coupling reduction ironmaking of garbage disposal. The system comprises a heat accumulating type rotary bed, an oil and gas separating device, a purification device, a transformation adsorption device and a gas base shaft furnace, wherein the heat accumulating type rotary bed is provided with a raw material inlet, a fuel gas inlet, a fume outlet, a pyrolytic water outlet, a pyrolytic gas-oil mixture outlet and a pyrolytic carbon outlet; the oil and gas separating device is provided with a pyrolytic gas-oil mixture inlet, a tar outlet and a pyrolytic gas outlet, and the pyrolytic gas-oil mixture inlet is connected with the pyrolytic gas-oil mixture outlet of the heat accumulating type rotary bed; the purification device is provided with a pyrolytic gas inlet and a purification pyrolytic gas outlet, and the pyrolytic gas inlet is connected with the pyrolytic gas outlet of the oil and gas separating device; the transformation adsorption device is provided with a purification pyrolytic gas inlet, a hydrogen outlet and a fuel gas outlet, and the purification pyrolytic gas inlet is connected with the purification pyrolytic gas outlet of the purification device; and the gas base shaft furnace is provided with a hydrogen inlet, an iron ore inlet, a sponge iron outlet and a fume outlet, and the hydrogen inlet is connected with the hydrogen outlet of the transformation adsorption device. According to the system and the method, the problems of difficulty in garbage disposal, high energy consumption of reduction ironmaking and the like are solved.
Description
Technical field
The invention belongs to solid waste resource recovery process field, and in particular to a kind of garbage disposal coupling reduction ironmaking
System and method.
Background technology
Garbage disposal problem has become China institute face after energy crisis, water pollution control, industrial waste process at present
The environmental problem of the another item sternness faced.Refuse pyrolysis process is generally acknowledged at present relative to the more preferable side of process of waste incineration
Formula, can not only clean and realize that the minimizing of rubbish is processed, and environment friendly is strong, and can obtain the higher oil of value, gas and
Solid carbon, avoids the generation of two English from principle, while most heavy metal incorporates lime-ash in pyrolytic process, reduces
Discharge capacity.
Gas-based shaft kiln technology is reacted using the reducibility gas such as hydrogen and iron ore, generates the mistake of sponge iron product
Journey.
In prior art, the pyrolysis gas calorific value that some refuse pyrolysis techniques are obtained is relatively low, it is difficult to sell as product, economical
Property is poor.Some reducibility gas used by gas-based shaft kiln reduction iron-smelting process are essentially from Coal Gasification, and coal gasification water consumption
Greatly, it is seriously polluted, much restricted in the application.
The content of the invention
The purpose of the present invention be for energy consumption in refuse pyrolysis technique it is larger, pyrolysis gas calorific value is low, pyrolysis product has been difficult to
The problems such as effect is utilized, and in reduction iron-smelting process, pollutant discharge amount is big, high energy consumption, high cost, reducing agent are difficult to solve
Problem, there is provided a kind of cleaning, the technique of efficient garbage disposal coupling reduction ironmaking.
Present invention firstly provides a kind of system of garbage disposal coupling reduction ironmaking, the system includes：
Heat accumulating type rotating bed, with feed(raw material)inlet, fuel gas entrance, exhanst gas outlet, pyrolysis water out, pyrolysis air-fuel mixture
Thing outlet, pyrolytic carbon outlet；
Gas and oil separating plant, with pyrolysis gas mixture entrance, tar outlet, pyrolysis gas outlet, the pyrolysis oil gas
Mixture inlet is connected with the pyrolysis gas mixture outlet of the heat accumulating type rotating bed；
Purifier, with pyrolysis gas entrance, purification pyrolysis gas outlet, the pyrolysis gas entrance is filled with the Oil-gas Separation
The pyrolysis gas outlet put is connected；
Pressure-swing absorption apparatus, with purification pyrolysis gas entrance, hydrogen outlet and fuel gas outlet, the purification pyrolysis gas enter
Mouth is connected with the purification pyrolysis gas outlet of the purifier；
Gas-based shaft kiln, with hydrogen inlet, iron ore entrance, sponge iron outlet, exhanst gas outlet, the hydrogen inlet and institute
The hydrogen outlet for stating pressure-swing absorption apparatus is connected.
In some embodiments of the invention, the fuel gas outlet of the pressure-swing absorption apparatus and the heat accumulating type rotating bed
Fuel gas entrance be connected.
In some embodiments of the invention, the system also includes coke quenching device, and the coke quenching device has pyrolytic carbon
Entrance, lime-ash outlet, quenching water inlet, the pyrolytic carbon entrance are connected with the pyrolytic carbon outlet of the heat accumulating type rotating bed.
In some embodiments of the invention, the heat accumulating type rotating bed includes dry section and pyrolysis zone；The pyrolysis water
Outlet is arranged in the side wall of the dry section end, and the pyrolysis gas mixture outlet is arranged in the top of the pyrolysis zone end
Portion.
Additionally, present invention also offers the method for a kind of utilization said system process rubbish and reduced iron, methods described bag
Include following steps：
Prepare rubbish；
The rubbish is sent in the heat accumulating type rotating bed and is pyrolyzed, pyrolysis gas mixture is obtained；
The pyrolysis gas mixture is sequentially sent to into the gas and oil separating plant and the purifier, is obtained clean
Pyrolysis gas；
The pyrolysis gas are sent into the pressure-swing absorption apparatus to be separated, hydrogen and fuel gas is obtained；
The hydrogen is sent into into the gas-based shaft kiln, to reducing iron ore.
In some embodiments of the invention, send the pyrolysis gas isolated fuel gas as fuel into the storage
Hot type revolving bed is pyrolyzed the rubbish.
In some embodiments of the invention, iron ore of low ore grade of the iron ore for iron-holder≤30%.
In some embodiments of the invention, the mean diameter≤100mm of the rubbish.
In some embodiments of the invention, the pyrolysis gas are separated under the pressure of 0.5MPa-2.5MPa, is made
Standby hydrogen and fuel gas.
In some embodiments of the invention, the rubbish is pyrolyzed at a temperature of 700 DEG C -1000 DEG C.
Pyrolysis gas are carried out pressure-variable adsorption and are isolated also using being pyrolyzed to rubbish using heat accumulating type rotating bed by the present invention
The fuel gas such as originality gas hydrogen and methane, and by hydrogen to reducing iron ore, whole process costs are low, two English of nothing are produced
Raw, environmental benefit is good, and the sponge iron quality of acquisition is high, the problems such as solve difficult garbage disposal and reduction iron production high energy consumption.
Additionally, present invention process is simple, product economy is profitable, it is easy to accomplish industrialization and scale.
Description of the drawings
Structural representations of the Fig. 1 for a kind of system of the garbage disposal coupling reduction ironmaking in the embodiment of the present invention；
A kind of process charts of the Fig. 2 for utilization said system pyrolysis rubbish and reduced iron in the embodiment of the present invention.
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so as to energy
The advantage of the solution of the present invention and its various aspects is more fully understood enough.However, specific embodiments described below and reality
It is only descriptive purpose to apply example, rather than limitation of the present invention.
Referring to Fig. 1, the system of the garbage disposal coupling reduction ironmaking that the present invention is provided includes：Sorting unit 1, breaker
2nd, heat accumulating type rotating bed 3, gas and oil separating plant 4, purifier 5, pressure-swing absorption apparatus 6, gas-based shaft kiln 7, coke quenching device 8.
Sorting unit 1 includes the equipment such as magnetic separation, screening, to sub-elect the inorganic matters such as the metal in rubbish, dregs.
Sorting unit 1 and breaker 2 are the pretreatment units of rubbish, can be selected according to the specific nature of garbage raw material
Whether arrange in systems.
Heat accumulating type rotating bed 3 has feed(raw material)inlet, fuel gas entrance, exhanst gas outlet, pyrolysis water out, pyrolysis air-fuel mixture
Thing outlet, pyrolytic carbon outlet.The feed(raw material)inlet of heat accumulating type rotating bed 3 is connected with the discharging opening of breaker 2.Heat accumulating type rotating bed
3, for carrying out pyrolysis processing to rubbish, prepare pyrolysis oil gas and pyrolytic carbon.
Heat accumulating type rotating bed 3 includes dry section and pyrolysis zone.Pyrolysis water out is arranged in the side wall of dry section end, so as to
Just it is collected being pyrolyzed when water is just produced, reduces system energy consumption；Pyrolysis gas mixture outlet is arranged in pyrolysis zone end
Top, to obtain the pyrolysis oil gas of high-quality；Pyrolytic carbon outlet is arranged in the bottom of pyrolysis zone end, to discharge.
Gas and oil separating plant 4 has pyrolysis gas mixture entrance, tar outlet, pyrolysis gas outlet, is pyrolyzed air-fuel mixture
Thing entrance is connected with the pyrolysis gas mixture outlet of heat accumulating type rotating bed 3.Gas and oil separating plant 4 is used for separation pyrolyzing oil and heat
Vent one's spleen.
Purifier 5 has pyrolysis gas entrance, the heat of purification pyrolysis gas outlet, pyrolysis gas entrance and gas and oil separating plant 4
Outlet of venting one's spleen is connected.Purifier 5 is used for removing the impurity in pyrolysis gas, to obtain more clean pyrolysis gas, improves product
Economic benefit.
Pressure-swing absorption apparatus 6 have purification pyrolysis gas entrance, hydrogen outlet and fuel gas outlet, purification pyrolysis gas entrance with
The purification pyrolysis gas outlet of purifier 5 is connected.Pressure-swing absorption apparatus 6 is vented one's spleen for heat of dissociation, prepares hydrogen and fuel gas.
The calorific value of the fuel gas that pressure-swing absorption apparatus 6 is separated is higher, in the system shown in Fig. 1, pressure-swing absorption apparatus 6
Fuel gas outlet be connected with the fuel gas entrance of heat accumulating type rotating bed 3, the fuel gas isolated has been sent directly into heat accumulating type rotation
Rotated bed 3, to be pyrolyzed rubbish.It is arranged so as to advantageously reduce the operating cost of system.Certainly, fuel gas can also collect storage,
Take out or otherwise utilized.
Gas-based shaft kiln 7 has hydrogen inlet, iron ore entrance, sponge iron outlet, exhanst gas outlet, and hydrogen inlet is inhaled with transformation
The hydrogen outlet of adsorption device 6 is connected.Reaction unit of the gas-based shaft kiln 7 for iron ore, with hydrogen reducing iron ore smelting iron.
Coke quenching device 8 has pyrolytic carbon entrance, lime-ash outlet, quenching water inlet, pyrolytic carbon entrance and heat accumulating type rotating bed 3
Pyrolytic carbon outlet be connected.Coke quenching device 8 is used for cooling down pyrolytic carbon, and certainly, pyrolytic carbon may also be employed other modes and be processed.
Fig. 2 is the process chart of a kind of process rubbish and reduced iron in the embodiment of the present invention, comprises the steps：
Prepare rubbish；
Rubbish is sent in heat accumulating type rotating bed 3 and is pyrolyzed, pyrolysis gas mixture is obtained；
Pyrolysis gas mixture is sequentially sent to into gas and oil separating plant 4 and purifier 5, clean pyrolysis gas are obtained；
Pyrolysis gas feeding pressure-swing absorption apparatus 6 is separated, hydrogen and fuel gas is obtained；
Hydrogen is sent into into gas-based shaft kiln 7, to reducing iron ore.
Obtained in of the invention, pyrolysis gas and tar calorific value are higher.Wherein, tar can be used as boiler oil, pyrolysis
Gas can be used as the fuel of heat accumulating type rotating bed 3, can reduce the operating cost of system.
Gas-based shaft kiln directly reduced iron-smelting process reduction rate is fast, product quality is stable, high degree of automation, unit production capacity
Greatly.The iron-holder of iron ore is fewer, is more difficult to reduction iron production.And the gas-based shaft kiln used by the present invention can process iron-holder≤30%
Iron ore of low ore grade.
Into the rubbish of heat accumulating type rotating bed 3 mean diameter it is best≤100mm, particle diameter is too big, the pyrolysis effect of rubbish
It is bad.
Find through substantial amounts of experiment, in the present invention, when pressure-variable adsorption heat of dissociation is vented one's spleen, preferably in 0.5MPa-2.5MPa
Pressure under pyrolysis gas are separated, prepare hydrogen and fuel gas.Pressure is too little, and the yield of hydrogen is low；Pressure is too big, equipment
Loss it is big.Catalyst used by pressure-variable adsorption is conventional catalyst.
Due to rubbish after sorting and be broken with regard to directly carrying out being pyrolyzed, therefore preferably heat accumulating type rotating bed 3 is dried
The temperature setting in area obtains higher, effectively to remove the moisture in rubbish, improves follow-up pyrolysis effect.Preferably, will
The temperature setting of the heat accumulation type radiant tube of 3 dry section of heat accumulating type rotating bed is 500 DEG C -700 DEG C.
The composition of rubbish is a lot, it is preferable that the temperature setting by the heat accumulation type radiant tube of 3 pyrolysis zone of heat accumulating type rotating bed is
700℃-1000℃.At this temperature, garbage energy is pyrolyzed completely.Certainly, also dependent on the material composition of rubbish, suitably adjust
Whole pyrolysis temperature.
It is mineral residue that pyrolytic carbon obtained in of the invention is most of, after quenching is processed, can be fed directly to landfill yard
Processed.
In said system, the beneficial effect of each device and the above-mentioned method for being pyrolyzed rubbish and reduced iron using the system is had
Beneficial effect overlaps, in order to more succinct, not excessive to describe.
Present invention achieves the efficient combination of refuse pyrolysis and reduction iron-smelting process, not only reduces operating cost, improve
The spatter property of whole technique, also add economic benefit, and is easy to industrialization promotion.
Below with reference to specific embodiment, the present invention will be described.In following embodiments, institute's taking technique condition value is
Exemplary, its desirable numerical range is as shown in foregoing summary.Detection method used by following embodiments is one's own profession
The conventional detection method of industry.
Embodiment 1
The present embodiment is processed to rubbish using the system shown in Fig. 1 and the process route shown in Fig. 2.Rubbish used
Moisture content is 36%, and as shown in table 1, concrete handling process is as follows for its concrete composition：
The rubbish of moisture content 36% is sent into into sorting unit 1, the inorganic matters such as glass, metal is removed, is entered back into disintegrating apparatus
2, choose garbage raw material of the mean diameter less than 100mm.Garbage raw material is sent into into heat accumulating type rotating bed 3, in dry section heat accumulating type
The temperature of radial canal is 550 DEG C, and the temperature of pyrolysis zone heat accumulation type radiant tube is 1000 DEG C.Rubbish is in rotation heat accumulating type rotating bed 3
The processes such as drying, pyrolytic gas making are sequentially passed through, the pyrolysis water for finally obtaining is from 3 dry section end burner hearth sidewall of heat accumulating type rotating bed
(pyrolysis water out) flow to Sewage Disposal process, is pyrolyzed end top of the gas mixture in 3 pyrolysis zone of heat accumulating type rotating bed
(pyrolysis gas mixture outlet) is discharged, and into gas and oil separating plant 4, is separated into pyrolysis gas and tar；Pyrolytic carbon is in rotation
Rotated bed end bottom (pyrolytic carbon outlet) is discharged by helix transporting device, after processing, is directly transported to and fills out in delivering to coke quenching device 8
Bury field to be disposed.Reacted with the iron ore of iron-holder 28% in pyrolysis gas feeding gas-based shaft kiln 7 after purification, prepared sea
Continuous ferrum.The operating pressure of gas-based shaft kiln 7 is 2.5MPa.
The yield of final obtained hydrogen was 35% (relative to stove rubbish is entered).Sponge after cooling, broken, magnetic separation
The iron-holder of ferrum is 95%.
Embodiment 2
The present embodiment is processed to rubbish using the system shown in Fig. 1 and the process route shown in Fig. 2.Rubbish used
Moisture content is 35%, and as shown in table 1, concrete handling process is as follows for its concrete composition：
The rubbish of moisture content 35% is sent into into sorting unit 1, the inorganic matters such as glass, metal is removed, is entered back into disintegrating apparatus
2, choose garbage raw material of the mean diameter less than 100mm.Garbage raw material is sent into into heat accumulating type rotating bed 3, in dry section heat accumulating type
The temperature of radial canal is 600 DEG C, and the temperature of pyrolysis zone heat accumulation type radiant tube is 700 DEG C.Rubbish rotation heat accumulating type rotating bed 3 according to
Secondary to pass through the processes such as drying, pyrolytic gas making, the pyrolysis water for finally obtaining is from 3 dry section end burner hearth sidewall of heat accumulating type rotating bed
(pyrolysis water out) flow to Sewage Disposal process, is pyrolyzed end top of the gas mixture in 3 pyrolysis zone of heat accumulating type rotating bed
(pyrolysis gas mixture outlet) is discharged, and into gas and oil separating plant 4, is separated into pyrolysis gas and tar；Pyrolytic carbon is in rotation
Rotated bed end bottom (pyrolytic carbon outlet) is discharged by helix transporting device, after processing, is directly transported to and fills out in delivering to coke quenching device 8
Bury field to be disposed.Reacted with the iron ore of iron-holder 30% in pyrolysis gas feeding gas-based shaft kiln 7 after purification, prepared sea
Continuous ferrum.The operating pressure of gas-based shaft kiln 7 is 0.5MPa.
The yield of final obtained hydrogen was 32% (relative to stove rubbish is entered).Sponge after cooling, broken, magnetic separation
The iron-holder of ferrum is 94%.
1 rubbish each component percentage composition (wt%) of table
Knowable to above-described embodiment, the yield of hydrogen obtained in above-described embodiment has been more than 30%, and the present invention is isolated,
To reduction iron production, the economic worth of product is improve.
Additionally, the iron-holder of iron ore used by above-described embodiment is less than 30%, and the iron-holder of obtained sponge iron
Higher than 94%, it was demonstrated that the good economy performance of the present invention.
To sum up, pyrolysis gas are carried out pressure-variable adsorption point using being pyrolyzed to rubbish using heat accumulating type rotating bed by the present invention
The fuel gas such as reducibility gas hydrogen and methane are separated out, and by hydrogen to reducing iron ore, whole process costs are low, nothing two
English is produced, and environmental benefit is good, and the sponge iron quality of acquisition is high, is solved garbage disposal difficulty and reduction iron production high energy consumption etc. and is asked
Topic.
Additionally, present invention process is simple, product economy is profitable, it is easy to accomplish industrialization and scale.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or it is integral；Can be that machinery connects
Connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to concrete feelings
Condition understands above-mentioned term concrete meaning in the present invention.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
Example ", or the description of " some examples " etc. mean specific features with reference to the embodiment or example description, structure, material or spy
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be arbitrary
Combined in individual or multiple embodiments or example in an appropriate manner.Additionally, in the case of not conflicting, the technology of this area
The feature of the different embodiments or example described in this specification and different embodiments or example can be combined by personnel
And combination.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and and
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need to be exhaustive to all of embodiment.And thus drawn
Obvious change that Shen goes out or among changing still in protection scope of the present invention.
Claims (10)
1. the system that a kind of garbage disposal coupling reduction is smelted iron, it is characterised in that the system includes：
Heat accumulating type rotating bed, goes out with feed(raw material)inlet, fuel gas entrance, exhanst gas outlet, pyrolysis water out, pyrolysis gas mixture
Mouth, pyrolytic carbon outlet；
Gas and oil separating plant, with pyrolysis gas mixture entrance, tar outlet, pyrolysis gas outlet, the pyrolysis air-fuel mixture
Thing entrance is connected with the pyrolysis gas mixture outlet of the heat accumulating type rotating bed；
Purifier, with pyrolysis gas entrance, purification pyrolysis gas outlet, the pyrolysis gas entrance and the gas and oil separating plant
Pyrolysis gas outlet is connected；
Pressure-swing absorption apparatus, with purification pyrolysis gas entrance, hydrogen outlet and fuel gas outlet, it is described purification pyrolysis gas entrance with
The purification pyrolysis gas outlet of the purifier is connected；
Gas-based shaft kiln, with hydrogen inlet, iron ore entrance, sponge iron outlet, exhanst gas outlet, the hydrogen inlet and the change
The hydrogen outlet of pressure adsorbent equipment is connected.
2. system according to claim 1, it is characterised in that the fuel gas outlet of the pressure-swing absorption apparatus and the storage
The fuel gas entrance of hot type revolving bed is connected.
3. system according to claim 1, it is characterised in that the system also includes coke quenching device, the coke quenching device
With pyrolytic carbon entrance, lime-ash outlet, quenching water inlet, the pyrolytic carbon entrance is gone out with the pyrolytic carbon of the heat accumulating type rotating bed
Mouth is connected.
4. system according to claim 1, it is characterised in that the heat accumulating type rotating bed includes dry section and pyrolysis zone；
The pyrolysis water out is arranged in the side wall of the dry section end, and the pyrolysis gas mixture outlet is arranged in the pyrolysis
The top of area end.
5. a kind of method that arbitrary system processes rubbish and reduced iron in utilization claim 1-4, it is characterised in that described
Method comprises the steps：
Prepare rubbish；
The rubbish is sent in the heat accumulating type rotating bed and is pyrolyzed, pyrolysis gas mixture is obtained；
The pyrolysis gas mixture is sequentially sent to into the gas and oil separating plant and the purifier, clean pyrolysis is obtained
Gas；
The pyrolysis gas are sent into the pressure-swing absorption apparatus to be separated, hydrogen and fuel gas is obtained；
The hydrogen is sent into into the gas-based shaft kiln, to reducing iron ore.
6. method according to claim 5, it is characterised in that using the pyrolysis gas isolated fuel gas as fuel
Send into the heat accumulating type rotating bed and be pyrolyzed the rubbish.
7. method according to claim 5, it is characterised in that low-grade iron ore of the iron ore for iron-holder≤30%
Stone.
8. method according to claim 5, it is characterised in that the mean diameter≤100mm of the rubbish.
9. method according to claim 5, it is characterised in that to the pyrolysis gas under the pressure of 0.5MPa-2.5MPa
Separated, prepared hydrogen and fuel gas.
10. method according to claim 5, it is characterised in that be pyrolyzed the rubbish at a temperature of 700 DEG C -1000 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106834585A (en) * | 2017-03-31 | 2017-06-13 | 江苏省冶金设计院有限公司 | The system and method for preparing sponge iron |
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