CN107314686A - A kind of kiln exhaust gas treating method and system - Google Patents
A kind of kiln exhaust gas treating method and system Download PDFInfo
- Publication number
- CN107314686A CN107314686A CN201710575832.XA CN201710575832A CN107314686A CN 107314686 A CN107314686 A CN 107314686A CN 201710575832 A CN201710575832 A CN 201710575832A CN 107314686 A CN107314686 A CN 107314686A
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- China
- Prior art keywords
- heat
- tail gas
- heat pump
- dust
- kiln exhaust
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- 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
- Y02P10/25—Process efficiency
Abstract
The invention provides a kind of kiln exhaust gas treating method and system, kiln exhaust gas treating method of the present invention comprises the following steps：（1）Dust removal process is carried out to tail gas by dust arrester；（2）The heat absorbing units that the tail gas that dust arrester is treated introduces heat pump are absorbed heat, cooling processing, make as little as less than 55 °C of temperature drop more than tail gas；（3）Tail gas after absorbing and cooling temperature is subjected to reducing temperature twice dust removal process by wet dedusting.Using the exhaust gas treating method of the present invention, tail gas carries out being passed through the heat absorbing units of heat pump after one-time dedusting by dust arrester, heat in the heat absorbing units tail gas of heat pump is largely siphoned away and abrupt temperature drop, exhaust temperature can be reduced to less than 55 °C, avoid wet dedusting stage dedusting water evaporation, be conducive to dust settling in tail gas and by the moisture absorption of wet dedusting, eliminate haze phenomenon.
Description
Technical field
The present invention relates to industrial tail gas processing, more particularly to a kind of kiln exhaust gas treating method and system.
Background technology
In recent years, haze phenomenon in some areas is serious, and environmental problem rises to new height, and national economy is caused
Significant negative impact, energy-saving and emission-reduction, elimination haze have become the important act that important people's livelihood engineering turns into country, enterprise advocates
Arrange.With industrial development, industrial tail gas discharge is more serious, and most of industrial tail gas is only by simple processing under normal circumstances
Just directly discharge, far from meet the requirement of environmental protection.Common industrial tail gas has pre- hot exhaust gas of boiler exhaust gas, material etc., these rows
Put exhaust temperature higher, several Baidu can be reached, directly discharge not only causes heat waste, also there is larger pollution to air.
For it is such the problem of, there is also the various handling process handled tail gas at present.Such as Application No.
201620779902.4, the applying date disclosed more than boiler exhaust gas desulfurization and dedusting for 2016.07.25 Chinese utility model patent
Heat utilization system, the exhaust treatment system is by the tail gas of boiler emission by heat exchanger tube heat exchange, by sack cleaner dedusting, so
Discharged afterwards after desulfurizing tower and dehydrator processing.Although this exhaust treatment system realizes heat recovery by heat exchange,
It is limited using water cooling heat transfer effect, tail gas also has higher temperature, then tail gas is higher by the heat of normal temperature part just in vain
Waste.Moreover, so the tail gas with higher temperature is only eliminated in tail gas when carrying out dust removal process by bag-type dust
The larger dust granules of particle diameter, can not eliminate the PM2.5 particles in emission, and dust removing effects are limited, for eliminating haze
Do not act on.
The content of the invention
It is an object of the invention to provide a kind of kiln exhaust gas treating method of good dedusting effect；The present invention is also provided simultaneously
A kind of kiln exhaust treatment system suitable for the handling process.
To achieve the above object, the technical scheme one of kiln exhaust gas treating method of the present invention：A kind of kiln vent gas treatment side
Method, comprises the following steps：（1）Dust removal process is carried out to tail gas by dust arrester；（2）The tail gas that dust arrester is treated draws
The heat absorbing units for entering at least one heat pump are absorbed heat, cooling processing, make as little as less than 55 °C of temperature drop more than tail gas；（3）Will
Tail gas after absorbing and cooling temperature carries out dust removal process by wet dedusting.
Using the present invention exhaust gas treating method, tail gas by dust arrester carry out one-time dedusting, can will it is therein greatly
Particle dust is filtered；Tail gas is passed through the heat absorbing units of heat pump afterwards, in the heat absorbing units tail gas of heat pump
Heat is largely siphoned away and abrupt temperature drop, realizes the abundant recovery of tail gas heat quantity, and by such process, exhaust temperature energy
Enough it is reduced to less than 55 °C；Hereafter tail gas by wet dedusting when carrying out reducing temperature twice dedusting, because temperature is relatively low more than tail gas, no
The moisture evaporation of wet dedusting can be caused, the moisture loss of wet dedusting is not resulted in substantially, and more than tail gas temperature it is relatively low so that
Hypomotility, flow velocity reduction, reduction in bulk, the sedimentation for the dust being more beneficial in tail gas and the suction of condensate of air molecule
Receive, the PM2.5 in the tail gas of discharge can be eliminated.
On the basis of above-mentioned technical proposal one,（2）In, it is preferable that the heat pump has a two or more, two with
In upper heat pump, the heat absorbing units for having at least two heat pumps are set up in parallel along gas flow paths, or have at least two
The heat absorbing units of individual heat pump are set up in parallel in the circumference on exhaust pipe road, can be so down to the temperature of tail gas more
Low temperature.
On the basis of above-mentioned technical proposal two, further optimization obtains technical scheme three, that is, sets two or more heat pump
System, and the heat absorbing units of each heat pump are set up in parallel along gas flow paths, this arrangement occupies little space.
On the basis of above-mentioned technical proposal one, the heat absorbing units for introducing heat pump in tail gas carry out absorbing and cooling temperature processing
Afterwards, more than tail gas below temperature drop as little as normal temperature.When temperature is reduced to below normal temperature, carried out to tail gas at reducing temperature twice dedusting
During reason, it is to avoid exhaust temperature is too high and makes spray water evaporation, and during exhaust temperature reduction exhaust gas volumes are shunk, flow velocity drops
It is low, it is more beneficial for the minute dusts sedimentation in tail gas.
In order to reclaim the water used in wet dedusting, the water after wet dedusting can be introduced in sedimentation basin.
Further, the water circulation that the sedimentation basin is communicated with clear water reserviors, clear water reserviors is used for wet dedusting.
On the basis of each above-mentioned technical scheme, it can include by spraying dress in the concrete mode of selection wet dedusting
Put spraying and dedusting.
On the basis of each above-mentioned technical scheme, the dust arrester is sack cleaner or electric dust collector or electric bag
Mixed dust removal device or cyclone dust collector.
The technical scheme one of the kiln exhaust treatment system of the present invention：Including carrying out dust removal process for the tail gas to introducing
Dust arrester, at least one be used for after dust removal process tail gas carry out absorbing and cooling temperature processing heat pump and for pair
The treated tail gas of heat pump carries out the Wet-way dust-collector of dust removal process, the air outlet connection heat pump of dust arrester
Heat absorbing units air inlet, the heat absorbing units air outlet of heat pump connects the air inlet of Wet-way dust-collector.
When carrying out vent gas treatment using the tail gas treatment device of the present invention, tail gas carries out one-time dedusting by dust arrester,
Bulky grain dust therein can be filtered；Tail gas is passed through the heat absorbing units of heat pump afterwards, in the suction of heat pump
Heat in hot cell tail gas is largely siphoned away and abrupt temperature drop, realizes the abundant recovery of tail gas heat quantity, by such process,
Exhaust temperature can be reduced to less than 55 °C, and hereafter tail gas by wet dedusting when carrying out reducing temperature twice dedusting, due to tail gas
Yu Wen is relatively low, does not result in the moisture evaporation of wet dedusting, the moisture loss of wet dedusting is not resulted in substantially, and more than tail gas
The relatively low hypomotility for causing air molecule of temperature, flow velocity reduction, reduction in bulk, are more beneficial for the sedimentation and condensation of dust in tail gas
The absorption of water, can eliminate the PM2.5 in the tail gas of discharge.
On the basis of the technical scheme one of above-mentioned kiln exhaust treatment system, it can optimize and obtain technical scheme two, institute
Stating dust arrester can be using sack cleaner or electric dust collector or electric bag mixed dust removal device or cyclone dust collector.
On the basis of the technical scheme one of above-mentioned kiln exhaust treatment system, it can optimize and obtain technical scheme three, institute
Stating heat pump has in two or more, two or more heat pump, has the heat absorbing units of at least two heat pumps along gas stream
Dynamic path is set up in parallel, or the heat absorbing units for having at least two heat pumps are set side by side in the circumference on exhaust pipe road
Put, so the temperature of tail gas can be down to lower temperature.
On the basis of the technical scheme three of above-mentioned kiln exhaust treatment system, it can further optimize and obtain technical scheme
Four, i.e., described heat pump has two or more, and the heat absorbing units of each heat pump are set up in parallel along gas flow paths, this
Arrangement is the simplest, saves space.
On the basis of each above-mentioned technical scheme, the Wet-way dust-collector is spray equipment, the spray equipment
Tank is reclaimed to connect with sedimentation basin and the water after spray can be made to flow into sedimentation basin.
Further, the upper strata clear water outflow that kiln exhaust treatment system also includes connecting with sedimentation basin and supplied in sedimentation basin
Clear water reserviors, clear water reserviors connect with spray equipment and are supplied water to spray equipment.
Brief description of the drawings
Schematic diagrams of the Fig. 1 for kiln exhaust gas treating method embodiment one of the invention in the first use environment；
Fig. 2 is kiln exhaust gas treating method one schematic diagram in second of use environment of embodiment of the invention；
Fig. 3 is the schematic diagram that tail gas flows along dust arrester, heat pump and Wet-way dust-collector；
Fig. 4 for the present invention kiln exhaust treatment system embodiment one in heat pump arrangement schematic diagram；
Fig. 5 for the present invention kiln exhaust treatment system embodiment two in heat pump arrangement schematic diagram.
In figure：1st, kiln；10th, xeothermic tail gas；2nd, dust arrester；3rd, dust collecting；4th, heat pump；6th, wet method is removed
Dirt device；7th, sedimentation basin；8th, clear water reserviors；9th, tail gas is emptied；11st, cold air；12nd, high-temperature gas；13rd, power station；14th, boiler；
40th, electric power acting unit；41st, heat absorbing units；42 heat-sink units.
Embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The embodiment one of the kiln exhaust gas treating method of the present invention, as shown in figure 1, the xeothermic tail gas that kiln 1 is discharged
10（Not water content）Primary dust removing is carried out by dust arrester 2, the big dust particle in tail gas can be filtered, and there are dust receipts
Acquisition means 3 are collected；In tail gas after primary dust removing, in the heat absorbing units 41 for introducing heat pump 4, heat pump 4 passes through electricity
Power acting unit 40 do work by Jing Guo heat absorbing units 41 xeothermic tail gas heat quantity absorption and make its abrupt temperature drop and be down to 55 °C with
Under, now exhaust temperature is from a few Baidu's rapid drawdowns to close to normal temperature, and this process realizes the heat absorption to xeothermic tail gas, cooling；Inhale
Hot cell 41 is by after heat transmission to heat-sink unit 42, and extraneous cold air 11 occurs heat exchange with heat-sink unit 42 and carries value liter
Temperature forms high-temperature gas 12, and high-temperature gas 12 be able to can also be used in later use, such as drying materials for dryer 1
Boiler oil is saved in boiler 14；Followed by, the tail gas for being reduced to lower temperature carries out secondary drop by Wet-way dust-collector 6 again
Warm dust removal process, it becomes possible to realize the height dedusting to tail gas and the abundant recovery to heat.
Being mainly characterized by for the kiln exhaust gas treating method of the present invention, being capable of maximized absorption tail gas by heat pump
In heat, the temperature of maximized reduction tail gas, heating is carried out by the effect of heat pump and carries after value that heat is subsequently sharp
With being achieved in that the effective recycling of heat.And be follow-up wet dedusting after the maximized reduction of exhaust temperature
Process provides advantage, because the heat carried out when exhaust temperature is higher in wet dedusting processing, tail gas can be in wet method
The moisture evaporation of wet dedusting is caused during dedusting, wet dedusting water consumption is exacerbated, and exhaust temperature it is higher when, air
Molecular motion distance, flow velocity are higher, and the fine particle contained in tail gas, such as PM2.5 particles, activity are violent, not free settling, wet
Also it is not easy to be absorbed in method dust removal process.And after by heat pump, exhaust temperature is reduced, air molecule hypomotility, stream
Prompt drop is low, and the fine particle activity contained in tail gas weakens, and is easy to sedimentation, and also allowed for during wet dedusting by moisture
Absorb, and do not result in moisture evaporation, not only optimize dust removing effects, and save water for dust removal.
By above-mentioned analysis, tail gas temperature when by heat pump drops lower, is more conducive to follow-up
Wet dedusting, accordingly, it is considered to electric energy loss and dust removing effects, preferably drop its temperature after tail gas is by heat pump
Even normal temperature is down to less than 40 DEG C（25℃）Below.
The kiln exhaust gas treating method of the present invention also reclaims the water in dust removal of wet dedusting process by sedimentation basin 7, so removes
Upper strata clear water can be introduced into clear water reserviors 8 after dirt water is precipitated in sedimentation basin 7, and is reused during wet dedusting, section
About water source.
In the embodiment one of the kiln exhaust gas treating method of the present invention, one-time dedusting is carried out using sack cleaner, passed through
Spray equipment spray carries out wet dedusting.In other embodiments, dust arrester can also be electric dust collector or electric bag
Mixed dust removal device is cyclone dust collector, and wet dedusting can use cleaning dust.
The kiln exhaust gas treating method of the present invention can also be handled the xeothermic tail gas of boiler emission, and through overheat
The high-temperature gas 12 of pumping system generation is used for used in the generating in power station 13.
The embodiment one of the kiln exhaust treatment system of the present invention, corresponding to the embodiment one of handling process, is specifically included
The dust arrester 2 of dust removal process is carried out for the tail gas to introducing, in addition to the tail gas after dust removal process is absorbed heat, cooled
The heat pump 4 of processing and the wet dedusting for carrying out reducing temperature twice dust removal process to the treated tail gas of heat pump 4
Device 6, the air outlet of dust arrester 2 connects the heat absorbing units air inlet of heat pump 4, the heat absorbing units air-out of heat pump 4
The air inlet of mouth connection Wet-way dust-collector 6, Wet-way dust-collector 6 is communicated with the sedimentation basin 7 for reclaiming water in dust removal, sedimentation basin
7 are communicated with clear water reserviors 8, and clear water reserviors 8 are used to flow into for the upper strata clear water in sedimentation basin 7, and the water in clear water reserviors 7 can be re-used for
Wet dedusting process.
The power of exhaust emissions amount and existing heat pump in view of kiln, heat pump can set n, wherein
N >=2, as shown in figure 4, the heat absorbing units 41 of each heat pump are set up in parallel along gas flow paths.
Present invention also offers the embodiment two of kiln exhaust treatment system, in embodiment two, as shown in figure 5, heat pump system
System has four, and being arranged circumferentially around exhaust pipe road of heat absorbing units 41 of each heat pump.Certainly, in other realities
Apply in mode, heat pump can have three or five or more than six.Cooling is sufficient in the power of heat pump to require
When, heat pump even can be one.
In the embodiment of above two kiln exhaust treatment system, dust arrester is sack cleaner, Wet-way dust-collector
For spray equipment, certainly, in other embodiments, dust arrester can also be cyclone dust collectors or be electric dust collector or
Person is electric bag dust device, and Wet-way dust-collector can be by settling tank filtering or be cleaning dust device.
Using the present invention kiln exhaust gas treating method by the present invention kiln exhaust treatment system can effectively by
Heat recovery in tail gas, at the same before wet dedusting by exhaust temperature be reduced to less than 55 °C it is even lower, so in wet method
Dust removal process is conducive to saving water source, effective dedusting, effectively controls haze.
Claims (10)
1. a kind of kiln exhaust gas treating method, it is characterised in that：（1）Dust removal process is carried out to tail gas by dust arrester；（2）Will
The heat absorbing units that the treated tail gas of dust arrester introduces at least one heat pump are absorbed heat, cooling processing, are made more than tail gas
As little as less than 55 °C of temperature drop；（3）Tail gas after absorbing and cooling temperature is subjected to dust removal process by wet dedusting.
2. kiln exhaust gas treating method according to claim 1, it is characterised in that：The heat pump has two or more,
In two or more heat pump, the heat absorbing units for having at least two heat pumps are set up in parallel along gas flow paths, Huo Zheyou
The heat absorbing units of at least two heat pumps are set up in parallel in the circumference on exhaust pipe road.
3. kiln exhaust gas treating method according to claim 2, it is characterised in that：The heat pump has two or more,
And the heat absorbing units of each heat pump are set up in parallel along gas flow paths.
4. kiln exhaust gas treating method according to claim 1, it is characterised in that：The heat absorption of heat pump is introduced in tail gas
Unit is carried out after absorbing and cooling temperature processing, more than tail gas below temperature drop as little as normal temperature.
5. the kiln exhaust gas treating method according to claim 1-4 any one, it is characterised in that：After the wet dedusting
Water introduce sedimentation basin in.
6. kiln exhaust gas treating method according to claim 5, it is characterised in that：The sedimentation basin is communicated with clear water reserviors,
Water circulation in clear water reserviors is used for wet dedusting.
7. a kind of kiln exhaust treatment system, it is characterised in that the dedusting including carrying out dust removal process for the tail gas to kiln
Device, at least one be used for after dust removal process tail gas carry out absorbing and cooling temperature processing heat pump and for heat pump system
The treated tail gas of system carries out the Wet-way dust-collector of dust removal process, and the air outlet of dust arrester connects the heat absorption list of heat pump
First air inlet, the heat absorbing units air outlet of heat pump connects the air inlet of Wet-way dust-collector.
8. kiln exhaust treatment system according to claim 7, it is characterised in that the dust arrester is sack cleaner
Or electric dust collector or electric bag mixed dust removal device or cyclone dust collector.
9. kiln exhaust treatment system according to claim 7, it is characterised in that the heat pump has two or more,
In two or more heat pump, the heat absorbing units for having at least two heat pumps are set up in parallel along gas flow paths, Huo Zheyou
The heat absorbing units of at least two heat pumps are set up in parallel in the circumference on exhaust pipe road.
10. kiln exhaust treatment system according to claim 9, it is characterised in that the heat pump has two or more,
The heat absorbing units of each heat pump are set up in parallel along gas flow paths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710575832.XA CN107314686A (en) | 2017-07-14 | 2017-07-14 | A kind of kiln exhaust gas treating method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575832.XA CN107314686A (en) | 2017-07-14 | 2017-07-14 | A kind of kiln exhaust gas treating method and system |
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| CN107314686A true CN107314686A (en) | 2017-11-03 |
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ID=60178683
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| CN201710575832.XA Pending CN107314686A (en) | 2017-07-14 | 2017-07-14 | A kind of kiln exhaust gas treating method and system |
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| CN105709528A (en) * | 2014-12-05 | 2016-06-29 | 重庆昌元化工有限公司 | Manganese slag drying tail gas processing system |
| CN207755920U (en) * | 2017-07-14 | 2018-08-24 | 河南省德耀节能科技股份有限公司 | A kind of kiln exhaust treatment system |
-
2017
- 2017-07-14 CN CN201710575832.XA patent/CN107314686A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102258923A (en) * | 2011-04-29 | 2011-11-30 | 青海宜化化工有限责任公司 | Method for recycling and reusing tail gas of calcium carbide furnace |
| CN102294159A (en) * | 2011-07-04 | 2011-12-28 | 南京工业大学 | Integrated processor for dirty, damp and hot tail gas and technology thereof |
| CN103418220A (en) * | 2012-05-21 | 2013-12-04 | 李崇兴 | Gas-fired boiler (direct-fired machine) flue-gas waste heat recovery device integrating functions of denitration and water collection |
| CN104226073A (en) * | 2013-06-13 | 2014-12-24 | 烟台龙源电力技术股份有限公司 | Demisting dedusting device for flue gas treatment and flue gas demisting dedusting system |
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