CN203772039U - Purification system with combination of utilization of waste heat of flue gas in electric furnace and efficient filtration - Google Patents
Purification system with combination of utilization of waste heat of flue gas in electric furnace and efficient filtration Download PDFInfo
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- CN203772039U CN203772039U CN201420194211.9U CN201420194211U CN203772039U CN 203772039 U CN203772039 U CN 203772039U CN 201420194211 U CN201420194211 U CN 201420194211U CN 203772039 U CN203772039 U CN 203772039U
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- flue gas
- temperature
- electric furnace
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- gas processing
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 239000003546 flue gas Substances 0.000 title claims abstract description 117
- 239000002918 waste heat Substances 0.000 title claims abstract description 24
- 238000001914 filtration Methods 0.000 title abstract description 5
- 238000000746 purification Methods 0.000 title abstract description 3
- 239000000428 dust Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 abstract description 8
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 23
- 230000008901 benefit Effects 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000035425 carbon utilization Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model discloses a purification system with combination of utilization of waste heat of flue gas in an electric furnace and efficient filtration. The system comprises the electric furnace, a flue gas treatment device, a dust removing device, a main blower and a chimney which are sequentially communicated through pipelines, wherein the flue gas treatment device comprises a high-temperature flue gas treatment segment and a medium- temperature and low-temperature flue gas treatment segment; the flue gas which is treated by the high-temperature flue gas treatment segment is introduced into the medium-temperature and low-temperature flue gas treatment segment to be treated; the temperature of the flue gas is not less than 450 DEG C after the flue gas is treated by the high-temperature flue gas treatment segment; the temperature of the flue gas is not greater than 250 DEG C after the flue gas is treated by the medium-temperature and low-temperature flue gas treatment segment. According to the system, the flue gas in the electric furnace is treated in different temperature areas, wherein in the high-temperature area, the upper limit temperature is 450 DEG C at which dioxin cannot be synthesized again, so that the resynthesis of the dioxin is avoided; in the medium- temperature and low-temperature area, the flue gas can be rapidly cooled to reach below the lower limit temperature of 250 DEG C at which the dioxin is synthesized again, so that the resynthesis of the dioxin is also avoided. Thus, the system disclosed by the utility model can be used for utilizing the waste heat of the flue gas as well as inhibiting the resynthesis of the dioxin, thereby decreasing the discharge of the dioxin.
Description
Technical field
The invention belongs to electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and cleaning equipment field, be specifically related to the system of a kind of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and high efficiency filter combined purifying.
Background technology
Existing electric furnace flue gas bioxin emission-reduction technology is substantially divided into source growing amount emission-reduction technology and Chengs the large class of bioxin emission-reduction technology two with Sheng.Source growing amount emission-reduction technology eliminates bioxin formation condition on source, can be sprayed into the means such as alkaline inhibitor and be realized by feed stock for blast furnace sorting, charging technology process control, flue gas water spray chilling, flue gas, estimates that bioxin can reduce discharging 80%～95%.Give birth to into bioxin emission-reduction technology and can be divided into high efficiency filter technology, active carbon adsorption technology, oxidation catalyst filter Remedia technology and the large class of other technologies four.High efficiency filter technology is that to utilize the overwhelming majority under bioxin cryogenic conditions be with solid-state form, to be adsorbed on the characteristic on flue dust surface, by high-efficiency dust remover, reduces dioxin emission amount.Active carbon adsorption technology is divided into two kinds of techniques, and a kind of technique is before sack cleaner, to spray into active carbon powder, and bioxin in absorption flue gas, then removes by sack cleaner, reaches the object that reduces dioxin emission.In the method flue gas, Qi Xiang bioxin is few with the contact of active carbon and the chance that is adsorbed, and sack cleaner cleaning cycle is short, and active carbon time of staying on cloth bag is short, and the low ， bioxin of active carbon utilization rate removal effect is limited; Another kind of technique is that fixed bed absorbent charcoal adsorber is set, and this technological investment cost is higher, for electric furnace flue gas as designed the unreasonable possibility that also has explosive combustion.Oxidation catalyst filter Remedia technology is initiated by W. L. Gore & Associates, Inc. company, surface filtration technology is integrated on filter bag with oxidation catalyst filter technology, can be Ba bioxin under low-temperature condition (180～260 ℃) by catalytic reaction, thoroughly resolve into CO, H2O and HCl ， bioxin and remove and thoroughly and not have secondary pollution.This technology is applicable to electric furnace flue gas, and is applicable to the technological transformation of existing sack cleaner, only needs the emission request of changing filter bag and can meeting bioxin.But filter bag is expensive, catalyst life is not high, and filter bag is changed frequent, and operating cost is relatively high.To other purification means of Sheng Cheng bioxin flue gas, its technological core is catalysis+decomposition technique, as selective catalysis reaction technology (SCR), electron beam decomposition technique, photocatalysis technology etc., these technology mosts are also in development, ubiquity cost of investment is higher, the problems such as device bulky complex, service life is low, large-scale commercial Application is still immature.The shortcomings such as flue gas chilling technique exists that operating cost is high, water consumption, fume afterheat are not recycled, reduce discharging but not energy-conservation.Although have at present, first pass through waste heat boiler Mist heat recovering, then the treatment process purifying by sack cleaner, this treatment process does not generally have the reduction of discharging of Kao Lv bioxin.
Summary of the invention
In view of this, the object of this invention is to provide the system of a kind of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and high efficiency filter combined purifying, not only can utilize electric furnace flue gas waste heat and can suppress the synthetic again of bioxin, thereby significantly reduce the discharge of bioxin.
The object of the invention is to be achieved through the following technical solutions:
The system of a kind of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and high efficiency filter combined purifying, comprise electric furnace, flue gas processing device, dust arrester, main air blower and chimney by pipeline successively UNICOM, described flue gas processing device comprises high-temperature flue gas processing section and middle low-temperature flue gas processing section, flue gas after described high-temperature flue gas processing section is processed is introduced in middle low-temperature flue gas processing section to be processed, flue-gas temperature after described high-temperature flue gas processing section is processed is not less than 450 ℃, and the flue-gas temperature after described middle low-temperature flue gas processing section is processed is not higher than 250 ℃;
Further, described high-temperature flue gas processing section adopts high pressure waste heat boiler to carry out waste heat recovery to flue gas;
Further, the flue-gas temperature after described high-temperature flue gas processing section processing is 500 ℃;
Further, described middle low-temperature flue gas processing section is pressed heat pipe waste heat boiler centering low-temperature flue gas to carry out waste heat recovery or is adopted the cooling mode centering low-temperature flue gas of spraying to carry out cooling in adopting;
Further, described dust arrester adopts sack cleaner, and described sack cleaner adopts efficient coated filter material and carries out the mixed wind of secondary flue gas and process.
The invention has the beneficial effects as follows: the present invention is by carrying out electric furnace flue gas the processing of temperature subregion, in high-temperature region because surpass bioxin 450 ℃ of synthetic ceiling temperatures again, thereby it is synthetic more not have bioxin, at middle low-temperature space, can make fast flue gas cool-down Zhi bioxin synthetic lower limit temperature below 250 ℃ again, thereby it is synthetic more also not have bioxin, therefore the present invention not only can utilize fume afterheat can also suppress the synthetic again of bioxin, thereby reduces the discharge capacity of bioxin.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating below, or can be instructed from the practice of the present invention.Target of the present invention and other advantages can be realized and be obtained by description below.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is the structural representation of the embodiment of the present invention one;
Fig. 2 is the structural representation of the embodiment of the present invention two.
The specific embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment is only for the present invention is described, rather than in order to limit the scope of the invention.
As shown in Figure 1, the electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN of embodiment mono-and the system of high efficiency filter combined purifying, comprise the electric furnace 1 by pipeline successively UNICOM, flue gas processing device 2, dust arrester 3, main air blower 4 and chimney 5, described flue gas processing device comprises high-temperature flue gas processing section 21 and middle low-temperature flue gas processing section 22, flue gas after described high-temperature flue gas processing section is processed is introduced in middle low-temperature flue gas processing section to be processed, flue-gas temperature after described high-temperature flue gas processing section is processed is not less than 450 ℃, flue-gas temperature after described middle low-temperature flue gas processing section is processed is not higher than 250 ℃.
In the present embodiment, described high-temperature flue gas processing section adopts high pressure waste heat boiler to carry out waste heat recovery to flue gas, and the flue-gas temperature after described high-temperature flue gas processing section is processed is set as 500 ℃; During described middle low-temperature flue gas processing section adopts, press heat pipe waste heat boiler centering low-temperature flue gas to carry out waste heat recovery, its outlet flue gas is set as 210 ℃.Existing high pressure waste heat boiler, middle pressure heat pipe waste heat boiler are all mature technologies, according to concrete Gas Parameters, equipment are carried out to correct type selecting and just can meet the requirement of rising setting parameter.
In the present embodiment, 500 ℃ of above high-temperature flue gas adopt high pressure waste heat boiler to reclaim flue gas heat, and this temperature range heat transfer temperature difference is large, and can effectively utilize gas radiation heat, and complex heat transfer efficiency is high; With lower, low-temperature zone, in adopting, press heat pipe waste heat boiler to reclaim low-temperature zone flue gas heat for 500 ℃, make full use of the Rapid Thermal hereditary property of heat pipe waste heat boiler phase change medium, can keep very high heat transfer efficiency equally.Therefore, the integrated of two kinds of technology makes less boiler heating surface just temperature can be down to fast to 210 ℃ of left and right.The advantage of the present embodiment is effectively to reduce the synthetic again of bioxin, again recyclable almost whole available fume waste heats.
In the present embodiment, flue gas finally purifies by sack cleaner again, sack cleaner adopts efficient coated filter material, adopt lower filtration velocity, can guarantee that exhanst gas outlet particle concentration also reduces to greatest extent the discharge of bioxin below 10mg/m3, is applicable to 50t with the larger electric furnace of last exhaust gas volumn.
Fig. 2 is the electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN of the utility model embodiment bis-and the system of high efficiency filter combined purifying, and the difference of the system of embodiment bis-and embodiment mono-is that middle low-temperature flue gas processing section adopts two medium high-pressure spray gun 6 centering low-temperature flue gas to spray cooling.
In the present embodiment, adopt two medium high-pressure spray gun sprayings to carry out chilling to flue gas, by import and export flue-gas temperature, flue gas flow, injection flow rate three momentum closed loop automatic control technologys, realize the fine adjustment to injection flow rate, make flue-gas temperature drop to 200 ℃ and guarantee that flue gas is more than flue gas dew point following time, guarantee that follow-up sack cleaner do not stick with paste bag, security of operation.
Nozzle in the present embodiment is located at waste heat boiler afterbody, by evaporative cooling, flue gas is quickly cooled to below 200 ℃, and this fraction flue gas heat does not reclaim, and can reduce waste heat boiler investment, and can significantly reduce bioxin synthetic risk again; Meanwhile, every mark side flue gas injection flow rate also significantly reduces, and rough calculation is about 1/6 of traditional flue gas chilling water consumption, and economy, environment comprehensive benefit are obvious.The advantage of the present embodiment is effectively to reduce the synthetic again of bioxin, and one-time investment is less, and system is simple, and energy consumption is low; Be suitable for 50t with the transformation of exhaust gas volumn small electric stove or existing electric furnace next time.
In the present embodiment, flue gas finally also purifies by sack cleaner, and sack cleaner adopts efficient coated filter material, adopts lower filtration velocity (being controlled at 0.8m/min following).For the particle in assurance sack cleaner safety and electric furnace secondary flue gas is Ji the elimination of bioxin has also taked secondary flue gas to mix wind measure.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of claim scope of the present invention.
Claims (5)
1. the system of an electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and high efficiency filter combined purifying, comprise electric furnace, flue gas processing device, dust arrester, main air blower and chimney by pipeline successively UNICOM, it is characterized in that: described flue gas processing device comprises high-temperature flue gas processing section and middle low-temperature flue gas processing section, flue gas after described high-temperature flue gas processing section is processed is introduced in middle low-temperature flue gas processing section to be processed, flue-gas temperature after described high-temperature flue gas processing section is processed is not less than 450 ℃, and the flue-gas temperature after described middle low-temperature flue gas processing section is processed is not higher than 250 ℃.
2. the system of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN according to claim 1 and high efficiency filter combined purifying, is characterized in that: described high-temperature flue gas processing section adopts high pressure waste heat boiler to carry out waste heat recovery to flue gas.
3. the system of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN according to claim 1 and high efficiency filter combined purifying, is characterized in that: the flue-gas temperature after described high-temperature flue gas processing section is processed is 500 ℃.
4. the system of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN according to claim 1 and high efficiency filter combined purifying, is characterized in that: during described middle low-temperature flue gas processing section adopts, press heat pipe waste heat boiler centering low-temperature flue gas to carry out waste heat recovery or adopt the cooling mode centering low-temperature flue gas of spraying to carry out cooling.
5. the system of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN according to claim 1 and high efficiency filter combined purifying, is characterized in that: described dust arrester adopts sack cleaner, and described sack cleaner adopts efficient coated filter material and carries out the mixed wind of secondary flue gas and process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420194211.9U CN203772039U (en) | 2014-04-21 | 2014-04-21 | Purification system with combination of utilization of waste heat of flue gas in electric furnace and efficient filtration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420194211.9U CN203772039U (en) | 2014-04-21 | 2014-04-21 | Purification system with combination of utilization of waste heat of flue gas in electric furnace and efficient filtration |
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| Publication Number | Publication Date |
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| CN203772039U true CN203772039U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420194211.9U Expired - Lifetime CN203772039U (en) | 2014-04-21 | 2014-04-21 | Purification system with combination of utilization of waste heat of flue gas in electric furnace and efficient filtration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900392A (en) * | 2014-04-21 | 2014-07-02 | 中冶赛迪工程技术股份有限公司 | Method and system for carrying out waste heat utilization, efficient filtration and unified purification on electric furnace flue gas |
-
2014
- 2014-04-21 CN CN201420194211.9U patent/CN203772039U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900392A (en) * | 2014-04-21 | 2014-07-02 | 中冶赛迪工程技术股份有限公司 | Method and system for carrying out waste heat utilization, efficient filtration and unified purification on electric furnace flue gas |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |