CN107185345A - A kind of kiln tail gas treatment process and system - Google Patents
A kind of kiln tail gas treatment process and system Download PDFInfo
- Publication number
- CN107185345A CN107185345A CN201710575833.4A CN201710575833A CN107185345A CN 107185345 A CN107185345 A CN 107185345A CN 201710575833 A CN201710575833 A CN 201710575833A CN 107185345 A CN107185345 A CN 107185345A
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- tail gas
- heat
- heat pump
- dust
- kiln
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- 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
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- 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
- B01D50/10—Combinations of devices covered by groups B01D45/00, B01D46/00 and B01D47/00
-
- 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
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- 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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- 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
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- 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
-
- 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
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- 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
- F27D2017/009—Cyclone for separating fines from gas
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
Abstract
The invention provides a kind of kiln tail gas treatment process and system, kiln tail gas treatment process comprises the following steps：（1）The heat absorbing units that tail gas is introduced 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；（2）The tail gas of heat absorbing units discharge from heat pump is subjected to dust removal process by dust arrester；（3）Tail gas after dust removal process is subjected to final dusting by wet dedusting.Tail gas exhaust temperature after the heat absorbing units cooling of heat pump can be reduced to less than 55 °C, so due to exhaust temperature reduction, cause its volume contraction, flow velocity reduction, air molecule hypomotility, advantage is provided for follow-up tails dedusting, dust removing effects are improved, and exhaust gas volumes reduction, flow velocity reduction also reduce infringement of the tail gas to dust arrester；Pass through wet dedusting again afterwards, can so eliminate the PM2.5 in tail gas further by the dust absorbing not yet filtered out in tail gas, eliminate haze.
Description
Technical field
The present invention relates to vent gas treatment, more particularly to a kind of kiln tail gas treatment process 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 good dedusting effect kiln tail gas treatment process；While present invention also offers
A kind of exhaust treatment system suitable for the handling process.
To achieve the above object, the technical scheme of kiln tail gas treatment process of the present invention is：A kind of kiln vent gas treatment work
Skill, comprises the following steps,（1）The heat absorbing units that tail gas is introduced at least one heat pump are absorbed heat, cooling processing, make tail
As little as less than 55 °C of temperature drop more than gas；（2）The tail gas of heat absorbing units discharge from heat pump is subjected to dedusting by dust arrester
Processing；（3）Tail gas after dust removal process is subjected to final dusting by wet dedusting.
The kiln tail gas treatment process of the present invention passes through tail gas the heat absorbing units of heat pump, in the heat absorption of heat pump
The heat of tail gas is largely siphoned away and abrupt temperature drop in unit, and exhaust temperature can be reduced to less than 55 °C, so due to tail gas
Temperature is reduced, and causes its volume contraction, flow velocity reduction, air molecule hypomotility, favourable bar is provided for follow-up tails dedusting
Part, improves dust removing effects, and exhaust gas volumes reduction, flow velocity reduction also reduce infringement of the tail gas to dust arrester；Afterwards again
By wet dedusting, the PM2.5 in tail gas can be so eliminated further by the dust absorbing not yet filtered out in tail gas,
Haze is eliminated, and due to relatively low by exhaust temperature after heat pump, water in dust removal is also avoided during wet dedusting by thermal evaporation,
Conserve water.
On the basis of above-mentioned technical proposal one,（2）In, it is preferable that the heat pump has two or more, two or more
In 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 heat pump are set up in parallel in the circumference on exhaust pipe road, can be so down to the temperature of tail gas lower
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 three kinds of technical schemes, the heat absorbing units for introducing heat pump in tail gas are carried out at absorbing and cooling temperature
After reason, more than tail gas below temperature drop as little as normal temperature, the minute dusts sedimentation in tail gas is more beneficial for.
Further, optimize on the basis of technical scheme one, two, three after obtaining technical scheme five, i.e. wet dedusting
Water in dust removal is precipitated by sedimentation basin and reclaimed.
On the basis of technical scheme five optimization can obtain technical scheme six, i.e. sedimentation basin be communicated with for will precipitation after
The clear water reserviors that reclaim of upper strata clear water, the recovery clear water in clear water reserviors is re-used for wet dedusting.
Further, on the basis of technical scheme one, two, three, the wet dedusting process includes passing through spray equipment
Spraying and dedusting.
Further, on the basis of technical scheme one, two, three, the dust arrester is sack cleaner or electric precipitation
Device or electric bag mixed dust removal device or cyclone dust collector.
The kiln exhaust treatment system of the present invention, including at least one to tail gas for being absorbed heat, the heat for the processing that cools
Pumping system, for by heat pump tail gas carry out one-time dedusting processing dry-method dust-removal device and for tail gas
Carry out the Wet-way dust-collector of final dusting processing, the air outlet connection dry-method dust-removal device air intake of the heat absorbing units of heat pump
Mouthful, the air outlet of dry-method dust-removal device connects the air inlet of Wet-way dust-collector.
The kiln exhaust treatment system of the present invention passes through tail gas the heat absorbing units of heat pump, in the heat absorption of heat pump
The heat of tail gas is largely siphoned away and abrupt temperature drop in unit, and exhaust temperature can be reduced to less than 55 °C, so due to tail gas
Temperature is reduced, and causes its volume contraction, flow velocity reduction, air molecule hypomotility, favourable bar is provided for follow-up tails dedusting
Part, improves dust removing effects；And exhaust gas volumes reduction, flow velocity reduction also reduce infringement of the tail gas to dust arrester.Afterwards
Pass through wet dedusting again, can so be eliminated further by the dust absorbing not yet filtered out in tail gas in tail gas
PM2.5, eliminates haze, and due to relatively low by exhaust temperature after heat pump, also avoided during wet dedusting water in dust removal by
Thermal evaporation, conserves water.
On the basis of technical scheme one, dry-method dust-removal device can elect sack cleaner or electric dust collector or electric bag as
Mixed dust removal device or cyclone dust collector.
On the basis of technical scheme one, optimization obtains technical scheme three, and heat pump has two or more, two or more heat
In pumping system, 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 heat
The heat absorbing units of pumping system are set up in parallel in the circumference on exhaust pipe road, can be so down to the temperature of tail gas lower
Temperature.
On the basis of above-mentioned technical proposal three, further optimization obtains technical scheme four, 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 each above-mentioned technical scheme, further optimization, the kiln exhaust treatment system also includes reclaiming
The sedimentation basin of the water in dust removal of Wet-way dust-collector, sedimentation basin is communicated with the clear water reserviors for the upper strata clear water after precipitation to be reclaimed,
The kiln exhaust treatment system also includes the supply channel for being used to being conveyed to the water in clear water reserviors into Wet-way dust-collector again.
So the water in dust removal of wet dedusting can be subjected to recycle and reuse.
On the basis of each above-mentioned technical scheme, further optimization, the Wet-way dust-collector is spray equipment, in tail
Temperature degree is relatively low, in the case that the dust in tail gas is easier sedimentation, and tail gas can be preferably eliminated by spray equipment spray
In PM2.5 particles.
Brief description of the drawings
Fig. 1 is the flow chart of the embodiment one of the kiln tail gas treatment process of the present invention；
Fig. 2 is the schematic diagram that tail gas flows along heat pump, dry-method dust-removal device and Wet-way dust-collector；
Fig. 3 is the arrangement schematic diagram of heat pump in kiln exhaust treatment system embodiment one of the invention；
Fig. 4 is the arrangement schematic diagram of heat pump in kiln exhaust treatment system embodiment two of the invention.
In figure：10th, xeothermic tail gas；2nd, dry-method dust-removal device；3rd, dust collecting；4th, heat pump；6th, wet dedusting
Device；7th, sedimentation basin；8th, clear water reserviors；9th, tail gas is emptied；11st, cold air；12nd, high-temperature gas；40th, electric power acting unit；41st, inhale
Hot cell；42 heat-sink units.
Embodiment
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
The specific embodiment one of the kiln tail gas treatment process of the present invention, as shown in Figure 1 to Figure 2, by the xeothermic tail of kiln
Gas 10 is introduced in the heat absorbing units 41 of sucking pump system 4, and heat pump 4 will pass through heat absorbing units by the electric power acting acting of unit 40
41 xeothermic tail gas heat quantity absorbs and makes its abrupt temperature drop and be down to less than 55 °C, now, because exhaust temperature is rapid from several Baidu
It is down to close to normal temperature, realizes the recycling to waste heat from tail gas；Heat absorbing units 41 are by after heat transmission to heat-sink unit 42, outside
With heat-sink unit 42 heat exchange occurs for the cold air 11 or cold water on boundary and proposes value heating to form high-temperature gas 12 or hot water for rear
It is continuous to utilize.
Then, the tail gas close to normal temperature is passed through in dry-method dust-removal device 2 and carries out primary dust removing processing, in the present embodiment,
Dry-method dust-removal device is sack cleaner, certainly, in other embodiments, and dry method dust can also be electric dust collector or electricity
Bag mixed dust removal device or cyclone dust collector.It is empty after by heat pump 4, exhaust temperature is reduced in the present embodiment
The sub- hypomotility of qi leel, flow velocity reduction, reduction in bulk, so when tail gas is by bag-type dust collector, to bag-type dust collector
Infringement it is smaller, and dust granules in tail gas are easier to settle and be filtered off, and improve dust removing effects.
Afterwards, the tail gas after primary dust removing is carried out in two-stage dust removal processing, the present embodiment by wet dedusting 6, wet method
Dedusting uses spray equipment spraying and dedusting, and certainly, in other embodiments, wet dedusting can also use cleaning dust device
Carry out cleaning dust.The heat absorbed because heat pump is maximized in tail gas, reduces the temperature of tail gas, the sky of tail gas
The sub- hypomotility of qi leel, flow velocity reduction, so when tail gas carries out spray process, dust granules are easier by spray-absorption, more
Easily sedimentation, further optimizes the effect of spraying and dedusting, eliminates the PM2.5 particles in tail gas, eliminates haze.Simultaneously will not
Because exhaust temperature is higher and causes to spray water evaporation, it is to avoid the waste of water resource.
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 which to electric energy loss and dust removing effects, its temperature is down into 40 DEG C after tail gas is by heat pump
Even it is down to normal temperature below（25℃）Below.
In the present embodiment, the water in dust removal of spray equipment is reclaimed by sedimentation basin, and the recycle-water in sedimentation basin is by heavy
Behind shallow lake, upper strata clear water is injected into clear water reserviors, is then used by water system circulation conveying to spray equipment for spray.
Using the present invention kiln tail gas treatment process 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.
The kiln exhaust treatment system of the present invention corresponds to the embodiment one of kiln tail gas treatment process, and specifically including is used for
Tail gas is absorbed heat, the heat pump 4 for the processing that cools, in addition to for once being removed by the tail gas of heat pump 4
The dry-method dust-removal device 2 of dirt processing and the Wet-way dust-collector 6 for carrying out final dusting processing to tail gas.Heat pump 4
Heat absorbing units 41 air outlet connect dry-method dust-removal device 2 air inlet, dry-method dust-removal device 2 air outlet connection wet method remove
The air inlet of dirt device 6, Wet-way dust-collector 6 is communicated with the sedimentation basin 7 for reclaiming water in dust removal, and sedimentation basin 7 is communicated with clear water
Pond 8, 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 8 can be re-used for wet dedusting
Journey.
Wherein, dry-method dust-removal device is sack cleaner, and Wet-way dust-collector is spray equipment, such as spray column, spray
Room etc..Certainly, in other embodiments, dry-method dust-removal device can also for electric dust collector or electric bag mixed dust removal device or
Cyclone dust collector；Wet dedusting can use cleaning dust.
The power of exhaust emissions amount and existing heat pump in view of dryer, heat pump can set n, its
Middle n >=2, as shown in figure 3, 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 4, 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.
Claims (10)
1. a kind of kiln tail gas treatment process, it is characterised in that（1）Tail gas is introduced to the heat absorbing units of at least one heat pump
Absorbed heat, cooling is handled, and makes as little as less than 55 °C of temperature drop more than tail gas；（2）By the tail of the heat absorbing units discharge from heat pump
Gas carries out dust removal process by dust arrester；（3）Tail gas after dust removal process is subjected to final dusting by wet dedusting.
2. kiln tail gas treatment process 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 tail gas treatment process 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. the kiln tail gas treatment process according to claim 1 or 2 or 3, it is characterised in that introduce heat pump in tail gas
Heat absorbing units carry out absorbing and cooling temperature processing after, more than tail gas below temperature drop as little as normal temperature.
5. the kiln tail gas treatment process according to claim 1 or 2 or 3, it is characterised in that the water in dust removal after wet dedusting
Precipitate and reclaim by sedimentation basin.
6. kiln tail gas treatment process according to claim 5, it is characterised in that after sedimentation basin is communicated with for that will precipitate
The clear water reserviors that reclaim of upper strata clear water, the recovery clear water in clear water reserviors is re-used for wet dedusting.
7. a kind of kiln exhaust treatment system, it is characterised in that be used to absorbing heat to tail gas including at least one, cooling is handled
Heat pump, for by heat pump tail gas carry out one-time dedusting processing dry-method dust-removal device and for pair
Tail gas carries out the Wet-way dust-collector of final dusting processing, the air outlet connection dry-method dust-removal device of the heat absorbing units of heat pump
Air inlet, the air outlet of dry-method dust-removal device connects the air inlet of Wet-way dust-collector.
8. 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.
9. kiln exhaust treatment system according to claim 8, 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.
10. the kiln exhaust treatment system according to claim 7-9 any one, it is characterised in that the kiln tail gas
Processing system also includes the sedimentation basin for reclaiming the water in dust removal of Wet-way dust-collector, and sedimentation basin is communicated with for by the upper strata after precipitation
The clear water reserviors that clear water is reclaimed, the kiln exhaust treatment system also includes removing for the water in clear water reserviors to be conveyed into wet method again
The supply channel of dirt device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575833.4A CN107185345A (en) | 2017-07-14 | 2017-07-14 | A kind of kiln tail gas treatment process and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575833.4A CN107185345A (en) | 2017-07-14 | 2017-07-14 | A kind of kiln tail gas treatment process and system |
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| CN107185345A true CN107185345A (en) | 2017-09-22 |
Family
ID=59883206
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| CN201710575833.4A Pending CN107185345A (en) | 2017-07-14 | 2017-07-14 | A kind of kiln tail gas treatment process and system |
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| CN205948685U (en) * | 2016-07-25 | 2017-02-15 | 博广热能股份有限公司 | Boiler tail gas desulfurization dust removal waste heat utilization system |
| CN206950898U (en) * | 2017-07-14 | 2018-02-02 | 河南省德耀节能科技股份有限公司 | Kiln exhaust treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN104359103A (en) * | 2014-12-02 | 2015-02-18 | 代元军 | Flue gas residual heat recovery system with absorption type heat pump circulation |
| 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 |
| CN205948685U (en) * | 2016-07-25 | 2017-02-15 | 博广热能股份有限公司 | Boiler tail gas desulfurization dust removal waste heat utilization system |
| CN206950898U (en) * | 2017-07-14 | 2018-02-02 | 河南省德耀节能科技股份有限公司 | Kiln exhaust treatment system |
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