CN204918646U - Limekiln flue gas active ingredient retrieves and is used for converter mixed injection device - Google Patents
Limekiln flue gas active ingredient retrieves and is used for converter mixed injection device Download PDFInfo
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- CN204918646U CN204918646U CN201520417423.3U CN201520417423U CN204918646U CN 204918646 U CN204918646 U CN 204918646U CN 201520417423 U CN201520417423 U CN 201520417423U CN 204918646 U CN204918646 U CN 204918646U
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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
Abstract
The utility model relates to a limekiln flue gas active ingredient retrieves and is used for converter mixed injection device, scrubber gas feed connects the tail gas in limekiln to export through the pipeline, and the gas outlet of scrubber connects through the pipeline the drying tower advances gas feed, and the gas outlet of drying tower connects through the pipeline that is equipped with the air -blower the gas feed of membrane separator, the gas outlet of membrane separator connects through the pipeline the gas feed of adsorption tower, the gas outlet of adsorption tower connects the import of CO2 surge tank through the pipeline that is equipped with the vacuum pump, the export of the CO2 surge tank pipe connection CO2 -O2 mixing arrangement's through being equipped with the fan CO2 import, CO2 -O2 mixing arrangement is last still to be equipped with the O2 import, and CO2 -O2 mixing arrangement's mist export is through pipeline to spray gun gas feed. The utility model discloses the CO2 concentration of retrieving reaches more than 98%, has reduced the production of smoke and dust to reduce the slag iron loss, improved the converter caloric power of gas.
Description
Technical field
The utility model belongs to ferrous metallurgy and energy-conserving and environment-protective technical field, relates to reduction of greenhouse gas discharge and haze Treatment process, and a kind of limestone kiln flue gas effective constituent reclaims and is used for converter and CO specifically
2-O
2mixed injection device.
Background technology
The CO that industry produces
2account for more than 20% of global emissions, and the CO of metallurgy
2quantity discharged accounts for 30.4% of industrial total release, is difficult to resource utilization all the time and recycles; Also there is the problem that dust and iron loss quantity discharged are large, recycling level is low in steelmaking process always.The flue dust of converter current steelshop flue gas purifying equipment trapping and the utilization of body refuse, mainly through sintering circuit reuse, or make pelletizing as steel-making refrigerant and dissolving agent use, energy consumption all can be caused to increase and secondary pollution.Therefore, how CO is reduced
2discharge, reduces flue dust and iron loss has become metallurgical process minimizing environmental pollution, improves resource utilization and reduced costs the key issue being badly in need of solving.
CO
2recovery technology is primarily of absorption process, membrane separation process, pressure swing adsorption process and rectification method, and wherein pressure swing adsorption process is due to pollution-free, easy to operate and receive much concern.But property that sorbent material accumulation can occur pressure-variable adsorption is poisoning, the accident of failure of apparatus, at purification CO
2time very high to source of the gas purity requirement.In addition, economically, pressure-variable adsorption need to pressurize guarantee CO to source of the gas
2the rate of recovery, and the energy 60-80% that gas pressurization consumes is used to non-CO
2the compression of gas, this part energy consumption can the loss with the discharge of tail gas after absorption, causes the waste of energy.And membrane separation process reclaims CO
2device is simple, easy to operate, is the world today develops an energy-saving CO rapidly
2separation and recovery technology, but be difficult to obtain highly purified CO2.
Utility model content
Technical problem to be solved in the utility model is, overcomes the shortcoming of prior art, providing a kind of limestone kiln flue gas effective constituent to reclaim method for converter mixed injection and device, not affecting in the process of producing and smelting, both reducing CO
2discharge, reduces iron steam output simultaneously, reduces the generation of flue dust, and reduces iron loss in slag, improves the calorific value of coal gas of converter.
The technical scheme that the utility model solves above technical problem is:
Limestone kiln flue gas effective constituent reclaims and is used for converter mixed injection device, comprises washer, drying tower, membrane separation apparatus, adsorption tower, CO
2buffer tank and CO
2-O
2mixing device, washer gas feed connects the offgas outlet in limestone kiln by pipeline, the pneumatic outlet of washer connects drying tower by pipeline and enters gas feed, the pneumatic outlet of drying tower connects the gas feed of membrane separation apparatus by the pipeline being provided with gas blower, the pneumatic outlet of membrane separation apparatus connects the gas feed of adsorption tower by pipeline, the pneumatic outlet of adsorption tower meets CO by the pipeline being provided with vacuum pump
2the import of buffer tank, CO
2the outlet of buffer tank connects CO by the pipeline being provided with blower fan
2-O
2the CO of mixing device
2import, CO
2-O
2mixing device is also provided with O
2import, CO
2-O
2the mixed gas outlet of mixing device by pipeline to spray gun gas feed.
The technical scheme that the utility model limits further is:
Aforesaid limestone kiln flue gas effective constituent reclaims and is used for converter mixed injection device, adsorption tower is multi-stage absorption tower, it is formed by pipeline and valve series connection by least two adsorption towers, and the sorbent material be provided with in each adsorption tower is gac, is provided with equilibration tube between each adsorption tower.
Aforesaid limestone kiln flue gas effective constituent reclaims and is used for converter mixed injection device, and the film in membrane separation apparatus is poly-imide resin film or acetate fiber film.
Reclaim CO
2what adopt is membrane sepn+pressure swing adsorption process, and membrane material adopts poly-film made by the polymer such as imide resin or acetate fiber; Pressure-variable adsorption adopts multitower absorption, and at least two adsorption towers form multi-stage absorption by pipeline and valve series connection, adopt gac as sorbent material, are provided with equilibration tube between each adsorption tower, utilize purified gas to rinse sorbent material during desorption.Adsorption process by adsorbing, all press, boost, replace, inverse put and vacuumize alternate cycles and carry out, make the CO in the limestone kiln tail gas of solution sucking-off
2concentration reaches more than 98%.
CO is collected owing to adopting membrane sepn+pressure swing adsorption process
2, and by CO
2with O
2mixed injection enters in converter by a certain percentage, can realize CO
2retrieving arrangement improves CO
2organic efficiency and CO
2-O
2the winding-up that mixed security is stable.
The beneficial effects of the utility model are: (1) the utility model membrane separation process reclaims CO
2device is simple, easy to operate, makes the CO2 concentration in the limestone kiln gas after separation reach more than 40%, reduces energy consumption; (2), in pressure-swing adsorption process, adopt advanced absorption, all press, boost, replace, inverse put, the alternately blocked operation step such as to find time, there is good stability and reliability; (3) membrane separation process and pressure-variable adsorption are combined, facility compact, device is simple, whole CO
2the energy consumption of recovery process reduces greatly.
The method of the utility model employing cooling, dedusting, drying, membrane sepn+pressure-variable adsorption is to the CO in lime burner furnace tail gas
2collect, by CO
2be mixed into O by a certain percentage
2in carry out the winding-up of converter steelmaking, Shi Huodian district temperature drops to 2000 DEG C, while reducing iron steam output, converter dust amount reduces about 25%, TFe decreased average more than 15% in flue dust, the iron loss decline 1-3% in slag, average dephosphorization rate improves 7.53%, and improve the calorific value of coal gas of converter, solve the problem such as iron loss, flue dust of converter steelmaking.The utility model adopts the gas effective constituent recovery process of membrane sepn+pressure-variable adsorption, makes the CO of recovery
2concentration reaches more than 98%, CO
2reduce discharging more than 20kg/t steel.
The utility model achieves CO
2reclaim and CO
2-O
2link between mixed injection steel-making, it is continuous print process that limestone kiln produces, and steel-making winding-up process is discrete, and this utility model achieves CO
2reclaim the balanced Matching between steelmaking system, ensure that CO in converter mixed injection and bottom blowing process
2the effective supply of gas, thus make CO
2the effective connection of the carrying out of compression system, stocking system, delivery system and Controlling System.
The utility model also solves CO simultaneously
2-O
2the problem of Homogeneous phase mixing and accurately control and bottom-blowing device longevity, improves China metallurgy industry CO
2the level of recycling, decreases environmental pollution and reduces costs, and has significant environment, economic and social benefit.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present utility model.
Embodiment
Embodiment 1
The limestone kiln flue gas effective constituent of the present embodiment reclaims and is used for converter mixed injection device, connects as shown in Figure 1, comprises washer 1, drying tower 2, membrane separation apparatus 3, adsorption tower 4, CO
2buffer tank 5 and CO
2-O
2mixing device 6, washer 1 gas feed connects the offgas outlet in limestone kiln by pipeline, the pneumatic outlet of washer 1 connects drying tower 2 by pipeline and enters gas feed, the pneumatic outlet of drying tower 2 connects the gas feed of membrane separation apparatus 3 by the pipeline being provided with gas blower 7, the pneumatic outlet of membrane separation apparatus 3 connects the gas feed of adsorption tower 4 by pipeline, the pneumatic outlet of adsorption tower 4 meets CO by the pipeline being provided with vacuum pump 8
2the import of buffer tank 5, CO
2the outlet of buffer tank 5 connects CO by the pipeline being provided with blower fan 9
2-O
2the CO of mixing device 6
2import, CO
2-O
2mixing device 6 is also provided with O
2import, CO
2-O
2the mixed gas outlet of mixing device 6 is controlled through pipeline to the gas feed of converter supersonic speed oxygen rifle by valve group.Adsorption tower is multi-stage absorption tower, and it is formed by pipeline and valve series connection by least two adsorption towers, and the sorbent material be provided with in each adsorption tower is gac, is provided with equilibration tube between each adsorption tower.
The limestone kiln flue gas effective constituent of the present embodiment reclaims the method being used for converter mixed injection, comprises the following steps:
(i) the tail gas in limestone kiln is passed through cooling, dedusting and desulfurization, send into membrane separation apparatus by gas blower after drying, make the CO2 concentration in the tail gas of limestone kiln reach more than 40%.
(ii) CO2 concentration is reached in the limestone kiln tail gas of more than 40% and send into adsorption tower, CO in adsorption tower
2adsorbed, the tail gas after purification is emptying through tower top, makes the CO in the limestone kiln tail gas of solution sucking-off
2concentration reaches more than 98%; By pipeline and valve, at least two adsorption tower series connection are formed multi-stage absorption tower, adopt gac as sorbent material, between each adsorption tower, be provided with equilibration tube, during desorption, utilize purified gas to rinse sorbent material.
Adsorption tower adopts pressure-variable adsorption, and be specially: (1) adsorb, the gas after membrane sepn enters adsorption tower, CO wherein
2adsorbed, the tail gas after purification is discharged from tower top; (2) all press, after absorption terminates, by sequencing valve, along absorption direction, the gas of elevated pressures in tower is put into and completes regeneration low pressure adsorbent tower, continuous several times drop pressure, CO
2concentration improves; (3) boost, this step sequence is corresponding with drop pressure process, repeatedly boost pressure, and pressure is again close to adsorptive pressure; (4) inverse put, along with the reduction of pressure, impurity composition is discharged, and CO2 concentration progressively improves, until pressure is close to normal pressure; (5) replace, displacement carries out under the pressure at the end of reverse bleeding off pressure, with the portioned product CO returned
2replace from adsorption bed inlet end, the impurity that removing is residual; (6) find time, pump out CO with vacuum pump
2send into gas-holder, the sorbent material after finding time completes regeneration substantially.
(iii) the CO of sucking-off will be separated
2concentration reaches the limestone kiln tail gas feeding CO of more than 98%
2buffer tank, will enter CO
2cO in buffer tank
2o is mixed into by certain content
2middlely enter in converter through converter supersonic speed oxygen rifle top blast and bottom blowing, wherein converter top-blow carbon dioxide content is 10-20%, and bottom blowing carbon dioxide content is 50%-100%.
Limestone kiln tail gas is after cooling dust-removal and desulfurizing and drying, and send into membrane separation apparatus by gas blower, the CO2 concentration in the limestone kiln gas after separation reaches more than 40%, enters adsorption tower, CO
2adsorbed, the tail gas after purification is emptying through tower top.Operated by transformation, the sorbent circulation after regeneration uses.Separate the CO of sucking-off
2buffer tank is entered, then at CO through blower fan
2-O
2cO2 ratio with 10% ~ 20% in mixed injection device is blown in converter.
By CO
2be mixed into O by a certain percentage
2in jet, top blast carbon dioxide content controls at 10-20%, and oxygen content is at 80-90%; Bottom blowing carbon dioxide content controls at 50%-100%, realizes safe, efficient, the stably manufactured of mixed injection steel-making; Molten bath " Huo Dian district " temperature will be made to drop to 2000 DEG C, and while reducing iron evaporation, converter dust amount reduces about 25%, and TFe decreased average more than 15% in flue dust, iron loss decline 1-3% in slag, average dephosphorization rate improves 7.53%.
In CO2 recovery process, adopt membrane separation process to reach more than 40% by concentrated for CO2 concentration, then use multi-tower variable pressure adsorption, employing acticarbon adsorbs, be provided with equilibration tube between each adsorption tower, utilize purified gas to rinse sorbent material during desorption, improve desorption efficiency.CO2 recovery process in the utility model improves the efficiency that CO2 reclaims, and reduces process energy consumption, makes the CO of recovery
2concentration reaches more than 98%.
Limestone kiln flue gas effective constituent reclaims and is used for converter CO by the present embodiment
2-O
2mixed injection is made steel, its technical process by lowering the temperature, dedusting, drying, membrane sepn+pressure-variable adsorption, storage, mixing, winding-up form, to the CO reclaimed
2carry out compressing and being delivered to steelshop, adopt air reservoir to carry out storage voltage stabilizing, then by CO
2be mixed into O by a certain percentage
2in jet, realize mixed injection steel-making safe, efficient, stably manufactured.The CO that the present embodiment reclaims
2concentration reaches more than 98%, CO
2reduce discharging more than 20kg/t steel, make molten bath " Huo Dian district " temperature drop to 2000 DEG C, while reducing iron evaporation, decrease the generation of flue dust, and reduce slag iron loss, improve coal gas of converter calorific value.
The present embodiment achieves CO
2reclaim and CO
2-O
2link between mixed injection steel-making, it is continuous print process that limestone kiln produces, and steel-making winding-up process is discrete, and this utility model achieves CO
2reclaim the balanced Matching between steelmaking system, ensure that CO in converter mixed injection and bottom blowing process
2the effective supply of gas, thus make CO
2the effective connection of the carrying out of compression system, stocking system, delivery system and Controlling System.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (3)
1. flue gas effective constituent in limestone kiln reclaims and is used for a converter mixed injection device, it is characterized in that: comprise washer, drying tower, membrane separation apparatus, adsorption tower, CO
2buffer tank and CO
2-O
2mixing device, described washer gas feed connects the offgas outlet in limestone kiln by pipeline, the pneumatic outlet of described washer connects described drying tower by pipeline and enters gas feed, the pneumatic outlet of described drying tower connects the gas feed of described membrane separation apparatus by the pipeline being provided with gas blower, the pneumatic outlet of described membrane separation apparatus connects the gas feed of described adsorption tower by pipeline, the pneumatic outlet of described adsorption tower meets described CO by the pipeline being provided with vacuum pump
2the import of buffer tank, described CO
2the outlet of buffer tank connects described CO by the pipeline being provided with blower fan
2-O
2the CO of mixing device
2import, described CO
2-O
2mixing device is also provided with O
2import, described CO
2-O
2the mixed gas outlet of mixing device by pipeline to spray gun gas feed.
2. limestone kiln as claimed in claim 1 flue gas effective constituent reclaims and is used for converter mixed injection device, it is characterized in that: described adsorption tower is multi-stage absorption tower, it is formed by pipeline and valve series connection by least two adsorption towers, the sorbent material be provided with in each adsorption tower is gac, is provided with equilibration tube between each adsorption tower.
3. limestone kiln as claimed in claim 2 flue gas effective constituent reclaims and is used for converter mixed injection device, it is characterized in that: the film in described membrane separation apparatus is poly-imide resin film or acetate fiber film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520417423.3U CN204918646U (en) | 2015-06-16 | 2015-06-16 | Limekiln flue gas active ingredient retrieves and is used for converter mixed injection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520417423.3U CN204918646U (en) | 2015-06-16 | 2015-06-16 | Limekiln flue gas active ingredient retrieves and is used for converter mixed injection device |
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| Publication Number | Publication Date |
|---|---|
| CN204918646U true CN204918646U (en) | 2015-12-30 |
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ID=54967792
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520417423.3U Active CN204918646U (en) | 2015-06-16 | 2015-06-16 | Limekiln flue gas active ingredient retrieves and is used for converter mixed injection device |
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|---|---|
| CN (1) | CN204918646U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893142A (en) * | 2017-11-29 | 2018-04-10 | 扬州高立达科技产业有限公司 | The control method that two kinds of gases of steelmaking converter top blast accurately mix |
| CN113413736A (en) * | 2021-06-25 | 2021-09-21 | 安徽碳零环保科技有限公司 | Cement kiln tail smoke low-concentration CO2Purification device and purification method |
-
2015
- 2015-06-16 CN CN201520417423.3U patent/CN204918646U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107893142A (en) * | 2017-11-29 | 2018-04-10 | 扬州高立达科技产业有限公司 | The control method that two kinds of gases of steelmaking converter top blast accurately mix |
| CN113413736A (en) * | 2021-06-25 | 2021-09-21 | 安徽碳零环保科技有限公司 | Cement kiln tail smoke low-concentration CO2Purification device and purification method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |