CN102620569B - Resource cyclic utilization system of industrial kiln - Google Patents
Resource cyclic utilization system of industrial kiln Download PDFInfo
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- CN102620569B CN102620569B CN 201210061085 CN201210061085A CN102620569B CN 102620569 B CN102620569 B CN 102620569B CN 201210061085 CN201210061085 CN 201210061085 CN 201210061085 A CN201210061085 A CN 201210061085A CN 102620569 B CN102620569 B CN 102620569B
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Abstract
The invention relates to a resource cyclic utilization system of an industrial kiln. After partial afterheat is recovered through a heat exchanger, smoke gas discharged by the kiln is introduced into a gas generating furnace together with cooling water steam and combustion-supporting air for recovery and utilization, CO2 in the smoke gas is reduced into CO in the generating furnace, cooling water steam and H2O in the smoke gas is reacted with C in the generating furnace to generate furnace gas, the generated furnace gas and the original furnace gas are simultaneously supplied to the industrial kiln to be burnt, and the cyclic utilization is realized, so the integral cyclic utilization of smoke gas afterheat, cooling media-water steam, smoke gas components and the like is realized, the gasification intensity and the gas yield of a gas generation station are greatly improved, the consumption of raw coal resources and the discharge quantity of greenhouse gas are reduced, energy sources are effectively saved, and the environment is protected.
Description
Technical field
The present invention relates to industrial resource and reclaim the field, relate to more specifically a kind of industrial furnace resource circulation utilization system.
Background technology
Of a great variety with the industrial furnace that producer gas acts as a fuel, use very extensive.Then general traditional handicraft flows to industrial furnace for to make coal gas by gas generating station, after burning by burner workpiece is heated.Gas generating station gas processed and the independently technological process of each self-forming of industrial furnace combustion heating, the fume afterheat that industrial furnace produces, cooling medium (steam), smoke components (CO
2, H
2O) etc. resource mostly directly discharge or utilize very few.
The research of reclaiming about this industrial furnace resource in recent years mainly concentrates on the recycling aspect of fume afterheat, there has been the combustion air that utilizes fume afterheat to heat self needs in the prior art, as use the high temperature air heat exchanger from the high-temperature flue gas of stove discharging the recovery section heat with the combustion air preheating, preheated air burns with producer gas in burner, this existing burning process has improved the burner hearth operating temperature, reduced energy resource consumption, but it will all drain in the atmosphere by flue gas, to smoke components (CO
2, H
2O), the resource such as cooling medium do not reclaim, and flue gas heat recovery is also seldom, therefore this existing burning process still exists two large problems:
1, the flue gas of the final discharging of kiln is taken away amount of heat and resource, wastes energy;
2, contain a large amount of CO in the flue gas of the final discharging of kiln
2Greenhouse gases and dust cause environmental problem.
Summary of the invention
The present invention is based on above-mentioned technical problem and propose, gas generating station gas processed system and industrial furnace combustion system are integrated into an integrated artistic system, form fume afterheat, cooling medium (steam), smoke components (CO
2, H
2O) etc. a kind of industrial furnace resource circulation utilization system of resource integrated recycling.
Major technique core of the present invention is: will reclaim stove discharging flue gas after the part of waste heat by heat exchanger and introduce together gas generator with cooling water steam, combustion air and recycle the CO in the flue gas
2(accounting for 16-18%) is reduced to CO in producer, the H in the flue gas
2O (g) (accounting for 10-11%) and cooling water steam generate producer gas at producer and C reaction, and supply with kiln burning with former producer gas, and be recycling, and the small part O in the flue gas
2(accounting for 1%) and combustion air then provide with the C reaction and respectively react institute's calorific requirement.
The technical scheme that the present invention specifically takes is:
A kind of industrial furnace resource circulation utilization system, comprise gas generating station, industrial furnace, heat exchanger, cooling system, blender and each vent line, wherein gas generating station provides fuel gas for industrial furnace, flue gas after the industrial furnace internal combustion is discharged through exit flue, described heat exchanger is arranged on this exit flue to utilize fume afterheat to come preheated air, air after the preheating exports blender to by a pipeline part, and another part mixes combustion-supporting with described fuel gas; The steam that described cooling system produces in refrigerating industry stove process exports blender to by pipeline; It is characterized in that, the downstream of described exit flue after heat exchange is connected with the off-gas recovery pipeline, the output of this off-gas recovery pipeline is connected to blender, and described blender together inputs to described preheated air, steam and the recovered flue gas that mixes by predetermined ratio in it and carries out resource circulation utilization in gas generating station.
Further according to system of the present invention, be provided with burner on the wherein said industrial furnace, the fuel gas that described another part preheated air and gas generating station provide mixes in this burner and burns, and the red-hot air-flow of generation sprays in the industrial furnace.
Further according to system of the present invention, wherein said heat exchanger comprises high-temperature heat-exchanging and cryogenic heat exchanger.
Further according to system of the present invention, wherein said high-temperature heat-exchanging is arranged at the upstream of exit flue, and the one end is connected in the air inlet air blast by pipeline, and the other end is connected in described burner by pipeline, and being used for provides the combustion air of preheating to it.
Further according to system of the present invention, wherein the combustion air temperature after described high-temperature heat-exchanging preheating reaches 350 ℃-450 ℃, and is provided with control valve on the air inlet of described high-temperature heat-exchanging and the outlet pipe.
Further according to system of the present invention, wherein said cryogenic heat exchanger is arranged at the downstream of high-temperature heat-exchanging, and the one end is connected in the air inlet air blast by pipeline, and the other end is connected in described blender by pipeline, and being used for provides preheated air to it.
Further according to system of the present invention, wherein the air themperature after described cryogenic heat exchanger preheating reaches more than 200 ℃, and is provided with control valve on the air inlet of described cryogenic heat exchanger and the outlet pipe.
Further according to system of the present invention, wherein said cooling system is the evaporated cooling system that is arranged on the industrial furnace, and is provided with control valve at its steam output pipe.
Further according to system of the present invention, wherein said exit flue is connected in chimney through induced-draft fan, described off-gas recovery pipeline is connected in described chimney, and being provided with flue gas input blower fan and control valve, all or part of flue gas resource that will discharge by described off-gas recovery pipeline is recycled in the blender.
Further according to system of the present invention, the resource component in the wherein said recovered flue gas mainly is CO
2And H
2O.
Further according to system of the present invention, the composition rear circulation gas making that occurs in sending into the gas generating station that contains C of respectively reclaiming in the wherein said blender reacts as follows:
C+CO
2=2CO-Q, CO wherein
2Mainly from the recovered flue gas;
C+H
2O=CO+H
2-Q, H wherein
2The steam that O mainly provides from recovered flue gas and cooling system;
C+O
2=CO
2+ Q, O wherein
2Replenish the required heat of above-mentioned other reactions mainly from preheated air, and by this reaction.
Further according to system of the present invention, wherein control the mixed proportion that respectively reclaims composition in the blender by the control valve on each pipeline that is connected in described blender.
Further according to system of the present invention, wherein said fuel gas main component is CO and H
2
Further according to system of the present invention, the fuel gas that wherein said gas generating station produces is sent into described burner by deduster by pipeline, fall into the slagging district after filter in the coal seam of dust in the described recovered flue gas in gas generating station, and enter water seal except pit with slag.
Further according to system of the present invention, wherein said industrial furnace is Rolling steel continuous furnace.
Further according to system of the present invention, air blast wherein, flue gas are inputted blower fan, induced-draft fan all can frequency control.
The technique effect that the present invention reaches:
1, the present invention has improved greatly the intensity of gasification and the gas production of gas generating station, and has reduced the use amount to former coal resource by the resource one such as fume afterheat, cooling medium, smoke components are reclaimed, and has effectively saved the energy;
2, reduce greatly the discharging of greenhouse gases carbon dioxide and flue dust etc. by device of the present invention, reduced the pollution of industrial combustion to environment.
Description of drawings
Accompanying drawing 1 is the structure chart of industrial furnace resource circulation utilization of the present invention system.
The implication of each Reference numeral is as follows in the accompanying drawing 1:
1. gas generating station; 2. burner; 3. industrial furnace; 4. exit flue; 5. high-temperature heat-exchanging; 6. cryogenic heat exchanger; 7. induced-draft fan; 8. chimney; 9. industrial furnace air blast; 10. gas station air blast; 11. control valve; 12. control valve; 13. diffusion valve; 14. diffusion valve; 15. flue gas input blower fan; 16. diffusion valve; 17. drum; 18 steam control valves; 19. blender.
The specific embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described in detail to understand more fully technical scheme of the present invention, but and does not mean that and limit the invention in these concrete embodiments.
Industrial furnace resource circulation utilization of the present invention system as shown in Figure 1, comprise gas generating station 1, burner 2, industrial furnace 3, exit flue 4, high-temperature heat-exchanging 5, cryogenic heat exchanger 6, induced-draft fan 7, chimney 8, industrial furnace with air blast 9, gas station with air blast 10, control valve 11-12, diffusion valve 13-14,16, flue gas input blower fan 15, evaporated cooling system 17, steam control valve 18, blender 19 and some breather lines.Wherein gas generating station 1 is for generation of the producer gas (main component is hydrogen and carbon monoxide) of burning usefulness, the producer gas of its generation is sent into burner 2 by deduster by pipeline, industrial furnace blasts normal temperature air in the high-temperature heat-exchanging 5 by control valve 11 with air blast 9, becoming high temperature air (general 350 ℃-450 ℃) behind the heat-shift sends in the burner 2, and carry out ratio with diffusion valve 13 and regulate, the mixed combustion in burner 2 of this high temperature air and producer gas, the red-hot air-flow of generation spray in the industrial furnace 3 with heating workpiece wherein.The exit flue 4 that the flue gas that burning forms is installed by industrial furnace 3 afterbodys is discharged, and high-temperature heat-exchanging 5 and the cryogenic heat exchanger 6 by arranging on the exit flue 4 successively, by induced-draft fan 7 flue gas is introduced in the chimney 8 at last and entered atmosphere, wherein this high-temperature heat-exchanging 5 can be the common heat exchanging pipe that is arranged at exit flue 4 front ends (temperature end), the one end is connected in industrial furnace air blast 9 by pipeline, the other end is connected in burner 2 by pipeline, after high-temp combustion flue gas (about more than 650 ℃) passes through this section exit flue 4, its heat the normal temperature combustion air that provided by air blast 9 is provided through high-temperature heat-exchanging 5 and it is preheated to high temperature air (about 350 ℃-450 ℃), the temperature of combustion product gases itself then is reduced to about 450 ℃, thereby effectively utilize the waste heat of combustion product gases that the combustion air of sending in the burner 2 has been carried out preheating by this high-temperature heat-exchanging 5, improved heat utilization rate.Further also be provided with heat exchanger 6 in the rear end of exit flue 4, existing reduce (approximately to about 450 ℃) of temperature when transferring to this section because of combustion product gases, therefore this heat exchanger is a kind of cryogenic heat exchanger 6, the one end is connected in gas station air blast 10 by pipeline, the other end is connected in blender 19 by pipeline, this gas station provides gas air processed (mainly utilizing its oxygen composition) with air blast 10 for the resource in the gas generating station 1 reclaims reaction, it blasts normal temperature air in the cryogenic heat exchanger 6 by control valve 12, and after it is preheating to about 200 ℃, send into blender 19, available diffusion valve 14 carries out ratio to be regulated.Simultaneously flue gas temperature after this cryogenic heat exchanger heat exchange is reduced to below 300 ℃, the induced-draft fan 7 through being installed on exit flue 4 ports of export and to chimney 8 interior discharges.Above-mentioned industrial furnace 3 can be Rolling steel continuous furnace usually, and with evaporated cooling system 17, cooling liquid such as water are housed in this evaporated cooling system 17 and are arranged on the industrial furnace 3 that (evaporated cooling system 17 and industrial furnace 3 separate that to draw be for the ease of observing in accompanying drawing 1 so that it is cooled off, usually both integrate), this evaporated cooling system 17 is behind the heat that absorbs industrial furnace 3, cooling water wherein becomes high-temperature vapor and inputs to blender 19 by pipeline interior to participate in the solid/liquid/gas reactions processed in the gas generating station 1 as the gasifying agent composition, can control its mixed proportion by control valve 18.Novelty of the present invention at the flue gas outlet side, preferably be provided with the off-gas recovery pipeline at chimney, and be provided with flue gas input blower fan and control valve, be recycled in the blender with all or part of flue gas resource that will discharge by this off-gas recovery pipeline, the concrete flue gas input blower fan 15 that passes through sucks the flue gas in the chimney 8 in the reclaim line, is then undertaken being conveyed into blender 19 after the proportion control by control valve 16.So far being mixed with discharging flue gas-main component in the blender 19 is CO
2(accounting for 16 ~ 18%), H
2O (g) (accounting for 10 ~ 11%) and O
2(accounting for 1%), (contain O from gas station with the hot-air of air blast 10
2) and from the high-temperature vapor H of evaporated cooling system 17
2O, these gas componants as gasifying agent can effectively participate in oxidation-reduction gas making reaction in the gas generating station 1, and regenerate producer gas and supply with the industrial furnace burning, to reach recycling purpose, and the coal seam filtration in gas generating station of the dust in the recovered flue gas falls into the slagging district, enters water seal except pit with slag.The gas making reaction that mist in the concrete blender 19 is sent into behind the gas generating station 1 and the C in it occurs is as follows:
C+O
2=CO
2+ Q (O wherein
2Provide necessary heat mainly from air blast 10, and by this reaction for following other gas making reactions);
C+CO
2=2CO-Q (CO wherein
2Mainly from the smoke components that reclaims in the chimney 8, by utilizing the CO in the flue gas
2Effectively replenished the C composition);
C+H
2O=CO+H
2-Q (H wherein
2O greatly reduces the demand to primitive reaction moisture from flue gas and evaporated cooling system 17).
Can find out that from above-mentioned course of reaction system of the present invention is not only with CO the flue gas
2, H
2The O composition replenishes and is gasifying agent, and utilizes fume afterheat to force above-mentioned reactive chemistry balance more to tend to be conducive to the carrying out of reduction reaction direction, thereby has effectively saved raw coal (C), reaches energy-conservation purpose.
In addition, above-mentioned air blast 9,10 and flue gas input blower fan 15, induced-draft fan 7 etc. all be frequency control, according to field working conditions, conveniently adjusted flow, pressure separately.And be equipped with control valve or diffusion valve at each air duct and flue as shown in Figure 1, the adjustable systems equilibrium operating.
The present invention is by the system shown in the above-mentioned accompanying drawing 1, both effectively utilized the waste heat (providing hot-air for burner and blender by heat exchanger) of flue gas, what is more important is recycling CO in the flue gas
2And H
2O resource component and cooling medium, thus reach fume afterheat, cooling medium (steam), smoke components (CO
2, H
2The purpose of resource integrated recovery such as O), gas generating station-industrial furnace residual heat and resource circulation utilization system have been initiated at home and abroad, the intensity of gasification and the gas production of gas generating station have been improved, and reduced use amount to raw coal (C) resource, have the multiple great economic results in society such as energy savings resource, reduce dust emission.
Below only be that preferred embodiment of the present invention is described; technical scheme of the present invention is not limited to this; the any known distortion that those skilled in the art do on the basis of major technique design of the present invention all belongs to the claimed technology category of the present invention; although be connected in chimney such as off-gas recovery pipeline in the above-described embodiments; but those skilled in the art also can connect in induced-draft fan with easy to use according to actual needs; the positions such as exit flue; although include in the embodiment shown in Figure 1 independent burner; but those skilled in the art also can use this to have the industrial furnace of burner in inside as required; above-mentioned each temperature conditions can change to some extent because of the difference in system applies of the present invention field; etc. these all belong to technology category of the present invention, the concrete protection domain of the present invention is as the criterion with the record of claims.
Claims (16)
1. industrial furnace resource circulation utilization system, comprise gas generating station, industrial furnace, heat exchanger, cooling system, blender and each vent line, wherein gas generating station provides fuel gas for industrial furnace, flue gas after the industrial furnace internal combustion is discharged through exit flue, described heat exchanger is arranged on this exit flue to utilize fume afterheat to come preheated air, air after the preheating exports blender to by a pipeline part, and another part mixes combustion-supporting with described fuel gas; The steam that described cooling system produces in refrigerating industry stove process exports blender to by pipeline; It is characterized in that, the downstream of described exit flue after heat exchange is connected with the off-gas recovery pipeline, the output of this off-gas recovery pipeline is connected to blender, and described blender together inputs to described preheated air, steam and the recovered flue gas that mixes by predetermined ratio in it and carries out resource circulation utilization in gas generating station.
2. system according to claim 1, it is characterized in that, be provided with burner on the described industrial furnace, the fuel gas that described another part preheated air and gas generating station provide mixes in this burner and burns, and the red-hot air-flow of generation sprays in the industrial furnace.
3. system according to claim 2 is characterized in that, described heat exchanger comprises high-temperature heat-exchanging and cryogenic heat exchanger.
4. system according to claim 3, it is characterized in that described high-temperature heat-exchanging is arranged at the upstream of exit flue, and the one end is connected in the industrial furnace air blast by pipeline, the other end is connected in described burner by pipeline, and being used for provides the combustion air of preheating to it.
5. system according to claim 4 is characterized in that, the combustion air temperature after described high-temperature heat-exchanging preheating reaches 350 ℃-450 ℃, and is provided with control valve on the air inlet of described high-temperature heat-exchanging and the outlet pipe.
6. system according to claim 3, it is characterized in that described cryogenic heat exchanger is arranged at the downstream of high-temperature heat-exchanging, and the one end is connected in the gas station air blast by pipeline, the other end is connected in described blender by pipeline, and being used for provides preheated air to it.
7. system according to claim 6 is characterized in that, the air themperature after described cryogenic heat exchanger preheating reaches more than 200 ℃, and is provided with control valve on the air inlet of described cryogenic heat exchanger and the outlet pipe.
8. system according to claim 1 is characterized in that, described cooling system is the evaporated cooling system that is arranged on the industrial furnace, and is provided with control valve at its steam output pipe.
9. system according to claim 1, it is characterized in that, described exit flue is connected in chimney through induced-draft fan, described off-gas recovery pipeline is connected in described chimney, and being provided with flue gas input blower fan and control valve, all or part of flue gas resource that will discharge by described off-gas recovery pipeline is recycled in the blender.
10. system according to claim 9 is characterized in that, the resource component in the described recovered flue gas mainly is CO
2And H
2O.
11. system according to claim 10 is characterized in that, the composition rear circulation gas making that occurs in sending into the gas generating station that contains C of respectively reclaiming in the described blender reacts as follows:
(1) C+CO
2=2CO-Q, CO wherein
2Mainly from the recovered flue gas;
(2) C+H
2O=CO+H
2-Q, H wherein
2The steam that O mainly provides from recovered flue gas and cooling system;
(3) C+O
2=CO
2+ Q, O wherein
2Replenish the required heat of above-mentioned other reactions mainly from preheated air, and by this reaction.
12. system according to claim 1 is characterized in that, controls the mixed proportion that respectively reclaims composition in the blender by the control valve on each pipeline that is connected in described blender.
13. system according to claim 1 is characterized in that, described fuel gas main component is CO and H
2
14. system according to claim 2, it is characterized in that, the fuel gas that described gas generating station produces is sent into described burner by deduster by pipeline, fall into the slagging district after filter in the coal seam of dust in the described recovered flue gas in gas generating station, and enter water seal except pit with slag.
15. system according to claim 1 is characterized in that, described industrial furnace is Continuous Heating Furnace of Rolled Steel.
16. according to claim 4,6 or 9 described systems, it is characterized in that, industrial furnace wherein with air blast, gas station with air blast, flue gas input blower fan, induced-draft fan all can frequency control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210061085 CN102620569B (en) | 2012-03-09 | 2012-03-09 | Resource cyclic utilization system of industrial kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210061085 CN102620569B (en) | 2012-03-09 | 2012-03-09 | Resource cyclic utilization system of industrial kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102620569A CN102620569A (en) | 2012-08-01 |
| CN102620569B true CN102620569B (en) | 2013-03-13 |
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ID=46560646
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|---|---|---|---|
| CN 201210061085 Expired - Fee Related CN102620569B (en) | 2012-03-09 | 2012-03-09 | Resource cyclic utilization system of industrial kiln |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104296532A (en) * | 2014-01-24 | 2015-01-21 | 宁波钢铁有限公司 | Automatic smoke mixing device for multiple sintering machines |
| CN110579315B (en) * | 2019-09-23 | 2021-08-17 | 武汉钢铁有限公司 | Heating furnace gas heat exchanger leak hunting device |
| CN112197269A (en) * | 2020-08-12 | 2021-01-08 | 山东信科环境科学研究院有限公司 | Differential rotating bed biomass pyrolysis gasification incinerator |
| CN113587664B (en) * | 2021-07-22 | 2023-03-21 | 无锡雪浪环境科技股份有限公司 | Waste recycling environment-friendly metallurgical furnace control method and control system |
| CN113773878B (en) * | 2021-09-30 | 2022-11-15 | 龙科天成(厦门)科技有限公司 | Preparation system of gasified gas fuel |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2039826U (en) * | 1988-07-22 | 1989-06-21 | 上海交通大学 | Cycling combustion system for kiln smoke |
| US5529599A (en) * | 1995-01-20 | 1996-06-25 | Calderon; Albert | Method for co-producing fuel and iron |
| JP4122570B2 (en) * | 1998-05-18 | 2008-07-23 | 大同特殊鋼株式会社 | Exhaust gas treatment equipment for arc furnace |
| SE532975C2 (en) * | 2008-10-06 | 2010-06-01 | Luossavaara Kiirunavaara Ab | Process for the production of direct-reduced iron |
| CN101705114B (en) * | 2009-11-20 | 2013-03-06 | 昆明理工大学 | Method for preparing combustible gas by using rotary kiln to melt and gasify household garbage |
| CN101818227A (en) * | 2010-05-05 | 2010-09-01 | 北京科技大学 | Method for recycling CO2 separated from converter steel-making gas for top blowing and bottom blowing |
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2012
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