CN106440841A - Exhaust gas recovery system for rotary kiln - Google Patents
Exhaust gas recovery system for rotary kiln Download PDFInfo
- Publication number
- CN106440841A CN106440841A CN201611113643.2A CN201611113643A CN106440841A CN 106440841 A CN106440841 A CN 106440841A CN 201611113643 A CN201611113643 A CN 201611113643A CN 106440841 A CN106440841 A CN 106440841A
- Authority
- CN
- China
- Prior art keywords
- rotary kiln
- dehydrator
- exhaust
- recovery system
- gas recovery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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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
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention belongs to the technical field of metallurgy lime calcination and specifically relates to an exhaust gas recovery system for a rotary kiln. The system comprises the rotary kiln, a rotary kiln exhaust gas discharging pipeline, a rotary kiln exhaust gas emission chimney, a briquette coal hot air pipeline, a coal fired boiler and a drying machine, wherein one end of the rotary kiln exhaust gas discharging pipeline is communicated with a discharging port of the rotary kiln while the other end is communicated with a bottom inlet of the rotary kiln exhaust gas emission chimney and the briquette coal hot air pipeline; the briquette coal hot air pipeline is communicated with the drying machine through a preheating chamber of the coal fired boiler; an adjusting gate plate for adjusting the inlet size is arranged at the bottom inlet of the rotary kiln exhaust gas emission chimney. According to the invention, the preheating for the exhaust gas discharged from the rotary kiln is utilized to dry the briquette products, so that the purposes of utilizing the exhaust gas and recovering the heat energy are achieved.
Description
Technical field
The invention belongs to metallurgy lime calcining technology field, specifically a kind of rotary kiln gas recovery system.
Background technology
The main equipment of metallurgy lime calcination system is rotary kiln, and fuel is bituminous coal, and grinding to form fineness by Vertical Mill is 200
After coal dust about mesh, burnt via the burner that Powered Air is blown in rotary kiln by metering device.According to heat
Work Theoretical Calculation, every kilogram of coal dust burns need the air of 8-10Nm3 completely；The production line of 800 tons of active limes of daily output is often little
When discharge amount of exhaust gas about 200000Nm3/h；EGT is at 160-200 DEG C.At present, domestic production enterprise more than 90% is all
Waste gas is directly discharged to air, not only increased the total emission volumn in area, enterprise also have lost proportion no small thermal source cost
Fund；According to Theoretical Calculation, ρ=0.746Kg/m3；CP=1.02 (KJ/kg. DEG C)；I=193KJ/kg；Then calculate cigarette per hour
The mark coal of gas heat content loss is 1018Kg, and the injection coal being converted into Q=6000Kcal/kg is 1187Kg, is roughly equal to RMB 950
Unit.
Content of the invention
For the problems referred to above, it is an object of the invention to provide a kind of rotary kiln gas recovery system, to reduce rotary kiln
The discharge capacity of flue tail gas, improves waste gas recovery utilization rate.
To achieve these goals, the present invention employs the following technical solutions：
A kind of rotary kiln gas recovery system, including rotary kiln, rotary kiln exhaust emission pipe, rotary kiln waste gas discharge cigarette
Chimney, moulded coal hot air duct, coal-burning boiler and dehydrator, wherein one end of rotary kiln exhaust emission pipe and the floss hole of rotary kiln
Connection, the other end is connected with the bottom inlet of rotary kiln waste gas discharge chimney and moulded coal hot air duct, described moulded coal hot air duct
Connect with dehydrator through the preheating chamber of coal-burning boiler, be provided with the bottom inlet of described rotary kiln waste gas discharge chimney adjust into
The regulation flashboard of mouth size.
It is sequentially provided with electric butterfly valve a, cleaner unit a and blower fan a along smoke discharging direction on described rotary kiln exhaust emission pipe,
The air outlet of described blower fan a is connected with the bottom inlet of rotary kiln waste gas discharge chimney by connecting pipe, described moulded coal hot blast
Pipeline is connected with described connecting pipe.
Described moulded coal hot air duct includes boiler preheating chamber air inlet side pipeline and boiler preheating chamber exhaust side pipeline, institute
The diameter stating preheating chamber exhaust side pipeline is less than the diameter of preheating chamber air inlet side pipeline.
The preheating interior of described coal-burning boiler is provided with roundabout air channel, enters the indoor waste gas of preheating by roundabout air channel heel row
Go out.
The bottom of described dehydrator and top are respectively equipped with main air intake passage and main air exhaust passage, with described main air intake passage
The moulded coal hot air duct connecting is provided with valve and blower fan b.
It is provided with the multiple branches air channel connecting with main air intake passage, on each branch air channel along its length in described dehydrator
It is connected with multiple hot blast discharge pipes, multiple exhaust vents are distributed with each hot blast discharge pipe, the top of described dehydrator is provided with many
Individual dehydrator exhaust outlet, each dehydrator exhaust outlet is all connected with main air exhaust passage.
The main air exhaust passage of described dehydrator is connected with drying oven waste gas discharge chimney by dehydrator exhaust piping.Described
It is sequentially provided with cleaner unit b and blower fan c along discharge directions on dehydrator exhaust piping.Described drying oven waste gas discharge chimney is provided with
Electric butterfly valve b.The outside of described rotary kiln exhaust emission pipe and moulded coal hot air duct is provided with heat-insulation layer.
Advantages of the present invention and beneficial effect are：
1. the present invention dries coal briquette product using the preheating of the flue gas (200 DEG C of gas temperature) of discharge of rotary kiln, from
And reach the purpose of exhaust gas utilization, heat recovery.
2. the present invention is needing to change when using exhausted air quantity of briquette production line, provides the aperture of control valve, to realize not
With the waste gas of production line and the demand of temperature.
3. near 60 DEG C of EGT after drying oven for the present invention, then go out to produce through sack cleaner purification heel row
System enters air, and purified gas dustiness is ＜ 30mg/m3；Reach in the range of the highest standard of environment protection emission index.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is enlarged drawing at the A in Fig. 1；
Fig. 3 is that the hot blast of the preheating interior of coal-burning boiler in the present invention flows to schematic diagram；
Fig. 4 is that in the present invention, the hot blast within dehydrator flows to schematic diagram.
In figure：1 is burner, and 2 is rotary kiln, and 3 is shaft preheater, and 4 is rotary kiln exhaust emission pipe, and 5 is electronic butterfly
Valve a, 6 is cleaner unit a, and 7 is blower fan a, and 8 is to adjust flashboard, and 9 is rotary kiln waste gas discharge chimney, and 10 is moulded coal hot air duct, 11
For coal-burning boiler, 111 is preheating chamber, and 112 is roundabout air channel, and 12 is valve, and 13 is blower fan b, and 14 is dehydrator, enters based on 141
Wind passage, 142 is branch air channel, and 143 is hot blast discharge pipe, and 144 is dehydrator exhaust outlet, air exhaust passage based on 145, and 15 is to dry
Dry machine exhaust piping, 16 is cleaner unit b, and 17 is blower fan c, and 18 is electric butterfly valve b, and 19 is drying oven waste gas discharge chimney.
Specific embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with the accompanying drawings with specific embodiment pair
The present invention is described in detail.
As shown in Figure 1-2, a kind of rotary kiln gas recovery system that the present invention provides, including rotary kiln 2, rotary kiln waste gas
Discharge tube 4, rotary kiln waste gas discharge chimney 9, moulded coal hot air duct 10, coal-burning boiler 11 and dehydrator 14, wherein rotary kiln
One end of exhaust emission pipe 4 is connected with the floss hole of rotary kiln 2, and the other end is entered with the bottom of rotary kiln waste gas discharge chimney 9
Mouthful and moulded coal hot air duct 10 connect, described moulded coal hot air duct 10 is through the preheating chamber 111 of coal-burning boiler 11 and dehydrator 14
Connection, is provided with the regulation flashboard 8 adjusting entrance size at the bottom inlet of described rotary kiln waste gas discharge chimney 9.
It is sequentially provided with electric butterfly valve a5, cleaner unit a6 and wind along smoke discharging direction on described rotary kiln exhaust emission pipe 4
The air outlet of machine a7, described blower fan a7 is connected with the bottom inlet of rotary kiln waste gas discharge chimney 9 by connecting pipe, described type
Coal hot air duct 10 is connected with described connecting pipe.
Described moulded coal hot air duct 10 includes boiler preheating chamber air inlet side pipeline and boiler preheating chamber exhaust side pipeline,
The diameter of described preheating chamber exhaust side pipeline is less than the diameter with preheating chamber air inlet side pipeline.Described rotary kiln waste gas discharge
The outside of pipeline 4 and moulded coal hot air duct 10 is provided with heat-insulation layer.
As shown in figure 3, being provided with roundabout air channel 112 in the preheating chamber 111 of described coal-burning boiler 11, enter in preheating chamber 111
Waste gas pass through roundabout air channel 112 after discharge.
As shown in figure 4, the bottom of described dehydrator 14 and top are respectively equipped with main air intake passage 141 and main air exhaust passage
145, the moulded coal hot air duct 10 being connected with described main air intake passage 141 is provided with valve 12 and blower fan b13.
It is provided with the multiple branches air channel 142 connecting with main air intake passage 141, each branch air channel 142 in described dehydrator 14
On be connected with multiple hot blast discharge pipes 143 along its length, multiple exhaust vents are distributed with each hot blast discharge pipe 143, described
The top of dehydrator 14 is provided with multiple dehydrator exhaust outlets 144, and each dehydrator exhaust outlet 144 is all connected with main air exhaust passage 145.
The main air exhaust passage 145 of described dehydrator 14 is connected with drying oven waste gas discharge chimney 19 by dehydrator exhaust piping 15.
It is sequentially provided with cleaner unit b16 and blower fan c17 along discharge directions on described dehydrator exhaust piping 15.Described drying oven
Waste gas discharge chimney 19 is provided with electric butterfly valve b18.
Embodiment
In the exit position of the tail gas exhaust machine (blower fan a7) (200 DEG C of gas temperature) of rotary kiln 2, that is, rotary kiln gives up
The position far from about 3 meters of ground for the bottom of gas blowdown stack 9, in the bottom positioned at fan outlet and rotary kiln waste gas discharge chimney 9
On metallic conduit (connecting pipe) between entrance (away from about 3 meters of ground), it is mounted with the regulation flashboard 8 of a rectangle, this regulation
Flashboard 8 possesses the function of adjusting rotary kiln waste gas discharge chimney 9 bottom inlet aperture.
In the upper end of the metallic conduit adjusting between flashboard 8 and blower fan a7 outlet, install the metal tube of diameter of phi 1800mm additional
Road (moulded coal hot air duct 10), extended distance about 200m, it is connected in the stove of coal-burning boiler 11 of briquette production line, then through straight
The metallic conduit (moulded coal hot air duct 10) of footpath Φ 1500mm is delivered in dehydrator 14, using flue gas (200 DEG C of gas temperature)
Preheat and to dry coal briquette product, thus reaching the purpose of exhaust gas utilization, heat recovery.
During normal production, the aperture that flashboard 8 cuts out about 80%, the waste gas diametrically Φ 1800mm of blower fan a7 output will be adjusted
Metallic conduit flow to briquette production line the body of heater (preheating chamber) of coal-burning boiler 11 in, then the metal through diameter of phi 1500mm
Pipeline is delivered in dehydrator 14, realizes being that 10% briquette prod is dried to water content.
When needing to change when using exhausted air quantity of briquette production line, by adjusting the aperture of flashboard 8, to realize different production lines
Waste gas and temperature demand.
EGT after drying oven is down to 60 DEG C, then by drying oven waste gas discharge after sack cleaner purification
Chimney 19 is discharged production system and is entered air, and purified gas dustiness is ＜ 30mg/m3；Reach environment protection emission index
In the range of high standard.
The foregoing is only embodiments of the present invention, be not intended to limit protection scope of the present invention.All in the present invention
Spirit and principle within made any modification, equivalent substitution and improvement, extension etc., be all contained in protection scope of the present invention
Interior.
Claims (10)
1. a kind of rotary kiln gas recovery system it is characterised in that include rotary kiln (2), rotary kiln exhaust emission pipe (4),
Rotary kiln waste gas discharge chimney (9), moulded coal hot air duct (10), coal-burning boiler (11) and dehydrator (14), wherein rotary kiln give up
One end of gas discharge tube (4) is connected with the floss hole of rotary kiln (2), the bottom of the other end and rotary kiln waste gas discharge chimney (9)
Portion's entrance and moulded coal hot air duct (10) connection, the preheating chamber through coal-burning boiler (11) for the described moulded coal hot air duct (10)
(111) connect with dehydrator (14), be provided with the bottom inlet of described rotary kiln waste gas discharge chimney (9) and adjust entrance size
Adjust flashboard (8).
2. rotary kiln gas recovery system according to claim 1 is it is characterised in that described rotary kiln exhaust emission pipe
(4) it is sequentially provided with electric butterfly valve a (5), cleaner unit a (6) and blower fan a (7), the air-out of described blower fan a (7) along smoke discharging direction on
Mouthful connected with the bottom inlet of rotary kiln waste gas discharge chimney (9) by connecting pipe, described moulded coal hot air duct (10) and institute
State connecting pipe connection.
3. rotary kiln gas recovery system according to claim 1 is it is characterised in that described moulded coal hot air duct (10) wraps
Include boiler preheating chamber air inlet side pipeline and boiler preheating chamber exhaust side pipeline, the diameter of described preheating chamber exhaust side pipeline
Diameter less than preheating chamber air inlet side pipeline.
4. rotary kiln gas recovery system according to claim 1 is it is characterised in that the preheating of described coal-burning boiler (11)
It is provided with roundabout air channel (112), the waste gas entering in preheating chamber (111) is discharged afterwards by roundabout air channel (112) in room (111).
5. rotary kiln gas recovery system according to claim 1 it is characterised in that the bottom of described dehydrator (14) and
Top is respectively equipped with main air intake passage (141) and main air exhaust passage (145), the moulded coal being connected with described main air intake passage (141)
Hot air duct (10) is provided with valve (12) and blower fan b (13).
6. rotary kiln gas recovery system according to claim 5 it is characterised in that be provided with described dehydrator (14) with
Multiple branches air channel (142) that main air intake passage (141) connects, each branch air channel (142) are connected with along its length multiple
Hot blast discharge pipe (143), is distributed with multiple exhaust vents on each hot blast discharge pipe (143), the top of described dehydrator (14) sets
There are multiple dehydrator exhaust outlets (144), each dehydrator exhaust outlet (144) is all connected with main air exhaust passage (145).
7. rotary kiln gas recovery system according to claim 5 is it is characterised in that the main air draft of described dehydrator (14)
Passage (145) is connected with drying oven waste gas discharge chimney (19) by dehydrator exhaust piping (15).
8. rotary kiln gas recovery system according to claim 7 is it is characterised in that described dehydrator exhaust piping (15)
On be sequentially provided with cleaner unit b (16) and blower fan c (17) along discharge directions.
9. rotary kiln gas recovery system according to claim 7 is it is characterised in that described drying oven waste gas discharge chimney
(19) it is provided with electric butterfly valve b (18).
10. rotary kiln gas recovery system according to claim 1 is it is characterised in that described rotary kiln exhaust pipe
The outside of road (4) and moulded coal hot air duct (10) is provided with heat-insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611113643.2A CN106440841B (en) | 2016-12-06 | 2016-12-06 | A kind of rotary kiln gas recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611113643.2A CN106440841B (en) | 2016-12-06 | 2016-12-06 | A kind of rotary kiln gas recovery system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106440841A true CN106440841A (en) | 2017-02-22 |
| CN106440841B CN106440841B (en) | 2019-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611113643.2A Active CN106440841B (en) | 2016-12-06 | 2016-12-06 | A kind of rotary kiln gas recovery system |
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| Country | Link |
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| CN (1) | CN106440841B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237326A (en) * | 2021-04-28 | 2021-08-10 | 安徽省泽乾冶金科技有限公司 | Rotary kiln waste heat utilization device |
| CN116747685A (en) * | 2023-07-23 | 2023-09-15 | 杭州回水科技股份有限公司 | Automatic discharging system and method for active coke regenerated waste gas |
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| JP2001098283A (en) * | 1999-08-16 | 2001-04-10 | Inst Fr Petrole | Method and plant for making combustible gas from supply rich in organic material |
| CN2498499Y (en) * | 2001-08-13 | 2002-07-03 | 中国人民解放军沈阳军区联勤部工程安装大队 | Air preheat and dust remover integral device |
| CN201637285U (en) * | 2010-03-11 | 2010-11-17 | 江山市何家山水泥有限公司 | Low-temperature residual heat power-generating and material drying system for cement dry-process rotary kiln |
| CN101982704A (en) * | 2010-10-12 | 2011-03-02 | 中国矿业大学 | Protective system and method for harmful substances in large-space public places of buildings |
| CN205332801U (en) * | 2016-01-20 | 2016-06-22 | 嘉善鑫强钢业有限公司 | Heating furnace |
| CN205373370U (en) * | 2015-12-25 | 2016-07-06 | 石家庄市矿区丰旺机械有限公司 | Egg -type briquet drying -machine wind -heat fast drying system |
| CN206291740U (en) * | 2016-12-06 | 2017-06-30 | 丹东同合高新科技有限公司 | Rotary kiln gas recovery system |
-
2016
- 2016-12-06 CN CN201611113643.2A patent/CN106440841B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001098283A (en) * | 1999-08-16 | 2001-04-10 | Inst Fr Petrole | Method and plant for making combustible gas from supply rich in organic material |
| CN2498499Y (en) * | 2001-08-13 | 2002-07-03 | 中国人民解放军沈阳军区联勤部工程安装大队 | Air preheat and dust remover integral device |
| CN201637285U (en) * | 2010-03-11 | 2010-11-17 | 江山市何家山水泥有限公司 | Low-temperature residual heat power-generating and material drying system for cement dry-process rotary kiln |
| CN101982704A (en) * | 2010-10-12 | 2011-03-02 | 中国矿业大学 | Protective system and method for harmful substances in large-space public places of buildings |
| CN205373370U (en) * | 2015-12-25 | 2016-07-06 | 石家庄市矿区丰旺机械有限公司 | Egg -type briquet drying -machine wind -heat fast drying system |
| CN205332801U (en) * | 2016-01-20 | 2016-06-22 | 嘉善鑫强钢业有限公司 | Heating furnace |
| CN206291740U (en) * | 2016-12-06 | 2017-06-30 | 丹东同合高新科技有限公司 | Rotary kiln gas recovery system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113237326A (en) * | 2021-04-28 | 2021-08-10 | 安徽省泽乾冶金科技有限公司 | Rotary kiln waste heat utilization device |
| CN116747685A (en) * | 2023-07-23 | 2023-09-15 | 杭州回水科技股份有限公司 | Automatic discharging system and method for active coke regenerated waste gas |
| CN116747685B (en) * | 2023-07-23 | 2023-11-21 | 杭州回水科技股份有限公司 | Automatic discharging system and method for active coke regenerated waste gas |
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| Publication number | Publication date |
|---|---|
| CN106440841B (en) | 2019-02-15 |
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