CN106642180A - Oxygen control and flame retardant system for secondary recycling coal boiler flue gas - Google Patents
Oxygen control and flame retardant system for secondary recycling coal boiler flue gas Download PDFInfo
- Publication number
- CN106642180A CN106642180A CN201611112261.8A CN201611112261A CN106642180A CN 106642180 A CN106642180 A CN 106642180A CN 201611112261 A CN201611112261 A CN 201611112261A CN 106642180 A CN106642180 A CN 106642180A
- Authority
- CN
- China
- Prior art keywords
- coal
- waste gas
- dryer
- exhaust
- flame retardant
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
Abstract
The invention belongs to the technical field of coal boiler flue gas emitting, in particular to an oxygen control and flame retardant system for secondary recycling coal boiler flue gas. The system comprises a coal-fired boiler, a warm-air pipe, a coal dryer, an exhaust duct, a gas exhausting chimney and a waste recovery pipe, wherein the exhaust emission mouth of the coal-fired boiler is connected to the air inlet of the coal dryer by the warm-air pipe, and the air outlet of the coal dryer is connected with the bottom mouth of the gas exhausting chimney by the exhaust pipe. And the gas exhausting chimney is provided with an electronic butterfly valve b, and an exhaust gas recycling mouth under the electronic butterfly valve b is placed on the side wall of the gas exhausting chimney, and the exhaust gas recycling pipe is connected with a furnace of the coal-fired boiler by the exhaust gas recycling pipe. The system realizes the oxygen control mode through taking back the CO2 recycling from the flue gas of the coal-fired boilers to the coal boiler, thereby preventing oxygen from entering the furnace to reduce the burning degree of the coal. Namely, there is no need to reduce coal and add slag. In this way, the workloads are reduced and the labor costs are saved.
Description
Technical field
The invention belongs to discharged from coal-fired boiler technical field, specifically a kind of fire coal boiler fume secondary recovery control oxygen
Flame retardant systems.
Background technology
The flue gas produced after common coal-fired boiler combustion is directly discharged to air, the no dust catcher device of major part, to ring
Bring new pollution sources and discharge capacity in border.Common coal-burning boiler in the control of ignition temperature, typically using following measures：(1)
Reduce coal-supplying amount, reduce blower fan wind supply quantity come realize reduce ignition temperature；(2) add a certain proportion of waste slag to reduce combustion
The ratio of coal, realizes that banking is acted on, and in turn results in temperature reduction.No matter any cool-down method, its objective is that destruction is good
Fired state, makes coal to continue fully burning, the combustion efficiency of coal is actually reduced, while forming black smoke
Coal is not exclusively grilled thoroughly, cause certain waste.Common coal-burning boiler is when ignition temperature is recovered, it usually needs when longer
Between heating up, then carry out the method for operating of " the big coal of strong wind ", bring having a strong impact on for big rise and big fall to system temperature.
The content of the invention
For the problems referred to above, it is an object of the invention to provide a kind of fire-retardant system of fire coal boiler fume secondary recovery control oxygen
System.The waste that causes and to system temperature the tight of big rise and big fall is brought to solve prior art when the burning degree of coal is reduced
The problem that ghost image rings.
To achieve these goals, the present invention is employed the following technical solutions：
A kind of fire coal boiler fume secondary recovery control oxygen flame retardant systems, including the drying of coal-burning boiler, hot air duct, coal briquette
The waste discharge gas port of machine, discharge duct, waste gas discharge chimney and exhaust gas recovery conduit, wherein coal-burning boiler is by hot air duct and coal
The air inlet connection of ball dryer, the exhaust outlet of the coal briquette dryer is entered by discharge duct with the bottom of waste gas discharge chimney
Mouth connection, the waste gas discharge chimney is provided with electric butterfly valve b, and the side wall of the waste gas discharge chimney is provided with positioned at electronic butterfly
Waste gas recovery mouth below valve b, the waste gas recovery mouth is connected by exhaust gas recovery conduit with the burner hearth of the coal-burning boiler.
Hand-operated butterfly valve and centrifugal blower a are provided with the air inlet of the coal briquette dryer.
Heat-insulation layer is provided with the outside of the hot air duct.
The air inlet of the coal briquette dryer is arranged at its bottom, and the exhaust outlet of the coal briquette dryer is arranged at its top
Portion.
The discharge duct is provided with deduster, be provided with the bottom inlet of the waste gas discharge chimney electric butterfly valve a and
Centrifugal blower b.
The exhaust gas recovery conduit has downward extension portion.
The upper end of the downward extension portion of the exhaust gas recovery conduit connects with the waste gas recovery mouth of the waste gas discharge chimney
Logical, bottom is provided with row's condensate water device.
The electric butterfly valve b is arranged at the position away from four meters of top discharge mouth of the waste gas discharge chimney.
Distance of the waste gas recovery mouth of the waste gas discharge chimney away from top discharge mouth is five meters.
A diameter of 1200mm of the exhaust gas recovery conduit.
Advantages of the present invention and beneficial effect are：
1. the present invention is by the CO in the flue gas for reclaiming discharged from coal-fired boiler2Send back in coal-burning boiler, realize control oxygen pattern,
The burning degree of coal is reduced to prevent oxygen into the method in stove, i.e., need not subtract coal, slag need not be added again, subtracted
Lack live load, save cost of labor.
2. the present invention is recovering furnace temperature due to not carrying out the operations such as banking, mixed slag, when recovering normal combustion, shortens six
Ten minutes, improve the comprehensive utilization performance of boiler.
3. the present invention using the preheating of the flue gas of discharged from coal-fired boiler drying coal briquette product, so as to reach exhaust gas utilization,
The purpose of heat recovery.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is that the inside hot blast of coal briquette dryer in the present invention flows to schematic diagram.
In figure：1 is coal-burning boiler, and 2 is hot air duct, and 3 is Hand-operated butterfly valve, and 4 is centrifugal blower a, and 5 is coal briquette dryer,
Air intake passage based on 51,52 be branch air channel, 53 be hot blast discharge pipe, 54 be dryer exhaust outlet, air exhaust passage based on 55,56
For dryer air inlet, 6 is discharge duct, and 7 is deduster, and 8 is electric butterfly valve a, and 9 is centrifugal blower b, and 10 is waste gas discharge cigarette
Chimney, 11 is electric butterfly valve b, and 12 are row's condensate water device, and 13 is exhaust gas recovery conduit, and 14 is downward extension portion.
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, a kind of fire coal boiler fume secondary recovery control oxygen flame retardant systems that the present invention is provided, including coal-fired pot
Stove 1, hot air duct 2, coal briquette dryer 5, discharge duct 6, waste gas discharge chimney 10 and exhaust gas recovery conduit 13, wherein coal-fired pot
The waste discharge gas port of stove 1 is connected by hot air duct 2 with the air inlet of coal briquette dryer 5, and the exhaust outlet of the coal briquette dryer 5 leads to
Cross discharge duct 6 to connect with the bottom inlet of waste gas discharge chimney 10, the waste gas discharge chimney 10 is provided with electric butterfly valve
B11, the side wall of the waste gas discharge chimney 10 is provided with the waste gas recovery mouth below electric butterfly valve b11, and the waste gas is returned
Closing in is connected by exhaust gas recovery conduit 13 with the burner hearth of the coal-burning boiler 1.
The hot air duct 2 is provided with and is provided with Hand-operated butterfly valve 3 and centrifugal blower at the air inlet of coal briquette dryer 5
A4, the outside of the hot air duct 2 is provided with heat-insulation layer, in case the loss of heat.
As shown in Fig. 2 the bottom of the coal briquette dryer 5 is provided with multiple dryer air inlets 56, the coal briquette dryer 5
Top be provided with multiple dryer exhaust outlets 54.
Further, the bottom of the coal briquette dryer 5 is provided with the main air intake connected with multiple dryer air inlets 56 and leads to
Road 51, top is provided with the main air exhaust passage 55 connected with multiple dryer exhaust outlets 54, the main air intake passage 51 and warm-air pipe
Road 2 is connected, and the main air exhaust passage 55 is connected with discharge duct 6.
The multiple branch air channels 52 for connecting with multiple dryer air inlets 56 respectively are provided with the coal briquette dryer 5, respectively
It is connected with multiple hot blast discharge pipes 53 on branch air channel 52 along its length, multiple air-out is distributed with each hot blast discharge pipe 53
Hole.
The preheating of the flue gas discharged using coal-burning boiler 1 is useless so as to reach drying the coal briquette product in coal briquette dryer 5
The first time utilization of gas and the purpose of heat recovery.
The discharge duct 6 is provided with deduster 7, and at the bottom inlet of the waste gas discharge chimney 10 electric butterfly valve is provided with
A8 and centrifugal blower b9.
The exhaust gas recovery conduit 13 has downward extension portion 14, and the upper end of the downward extension portion 14 is useless with described
The waste gas recovery mouth connection of gas blowdown stack 10, bottom is provided with row's condensate water device 12.The effect of the downward extension portion 14
It is that blowdown, row's condensed water are carried out by row's condensate water device 12 in the bottom of pipeline.
Shown electric butterfly valve b11 is the valve for possessing remote auto control regulation, by opening and closing electric butterfly valve
B11 is changing into the exhaust gas flow in exhaust gas recovery conduit 13.When electric butterfly valve b11 is closed, more flue gases are entered into
In exhaust gas recovery conduit 13, rich in CO2Flue gas, be sent in the burner hearth of coal-burning boiler 1, due to without O2Supplement, burn journey
Degree has and declines to a great extent, and is now " control oxygen pattern ".So as to reach second utilization and the purpose of heat recovery of waste gas.
In one embodiment of the invention, the electric butterfly valve b11 is arranged at arranging away from top for the waste gas discharge chimney 10
Put the position of four meters of mouth, the distance of the waste gas recovery mouth of the waste gas discharge chimney 10 away from top discharge mouth is five meters, described useless
A diameter of 1200mm of gas recovery channel 13.
In the front end of flue gas exhaust blower (centrifugal blower b9), one filter area of design and installation is 500 squares of cloth bag
Deduster, it is therefore an objective to reduce the dust emissions amount of chimney, purification is later, meet ring to be ensured of flue gas when entering into blower fan
Protect discharge index.
In sum, The present invention reduces fume emission, indirectly reduces CO2Total emission volumn, " control oxygen pattern " is opened
Afterwards, smoke discharge amount reduces by 50%, is that area surroundings protection is made that certain contribution.The present invention is without banking process and " greatly
The state of wind big fire ", improves the burning degree of burning of the coal in stove, reduces the consumption of coal.Recovering boiler
During temperature, terminate " control oxygen pattern ", only the electric butterfly valve b11 on waste gas discharge chimney 10 need to be opened 50%, combustion blower
5Hz is improved, the coal in boiler can reach fully burning in five minutes, recover the state before " control oxygen pattern ", make boiler
Overall efficiency improves more than 10%.
Embodiments of the present invention are the foregoing is only, protection scope of the present invention is not intended to limit.It is all in the present invention
Spirit and principle within any modification, equivalent substitution and improvements, the extension made etc., be all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of fire coal boiler fume secondary recovery control oxygen flame retardant systems, it is characterised in that including coal-burning boiler (1), warm-air pipe
Road (2), coal briquette dryer (5), discharge duct (6), waste gas discharge chimney (10) and exhaust gas recovery conduit (13), wherein coal-fired pot
The waste discharge gas port of stove (1) is connected by hot air duct (2) with the air inlet of coal briquette dryer (5), the coal briquette dryer (5)
Exhaust outlet is connected by discharge duct (6) with the bottom inlet of waste gas discharge chimney (10), on the waste gas discharge chimney (10)
Electric butterfly valve b (11) is provided with, the side wall of the waste gas discharge chimney (10) is provided with the waste gas below electric butterfly valve b (11)
Recovery port, the waste gas recovery mouth is connected by exhaust gas recovery conduit (13) with the burner hearth of the coal-burning boiler (1).
2. fire coal boiler fume secondary recovery control oxygen flame retardant systems according to claim 1, it is characterised in that the hot blast
Heat-insulation layer is provided with the outside of pipeline (2), the discharge duct (6) is provided with deduster (7), the waste gas discharge chimney (10)
Electric butterfly valve a (8) and centrifugal blower b (9) is provided with bottom inlet.
3. fire coal boiler fume secondary recovery control oxygen flame retardant systems according to claim 1, it is characterised in that the waste gas
Recovery channel (13) is with downward extension portion (14).
4. fire coal boiler fume secondary recovery control oxygen flame retardant systems according to claim 3, it is characterised in that the waste gas
The upper end of the downward extension portion (14) of recovery channel (13) connects with the waste gas recovery mouth of the waste gas discharge chimney (10), to
The bottom of lower extension point (14) is provided with row's condensate water device (12).
5. fire coal boiler fume secondary recovery control oxygen flame retardant systems according to claim 1, it is characterised in that described electronic
Butterfly valve b (11) is arranged at the position away from four meters of top discharge mouth of the waste gas discharge chimney (10).
6. fire coal boiler fume secondary recovery control oxygen flame retardant systems according to claim 5, it is characterised in that the waste gas
Distance of the waste gas recovery mouth of blowdown stack (10) away from top discharge mouth be five meters, the exhaust gas recovery conduit (13) it is a diameter of
1200mm。
7. fire coal boiler fume secondary recovery control oxygen flame retardant systems according to claim 1, it is characterised in that the hot blast
Hand-operated butterfly valve (3) and centrifugal blower a (4) are provided with pipeline (2) at coal briquette dryer (5) air inlet.
8. fire coal boiler fume secondary recovery control oxygen flame retardant systems according to claim 1, it is characterised in that the coal briquette
The bottom of dryer (5) is provided with multiple dryer air inlets (56), and at the top of the coal briquette dryer (5) multiple dryers are provided with
Exhaust outlet (54).
9. rotary kiln gas recovery system according to claim 8, it is characterised in that the bottom of the coal briquette dryer (5)
Portion is provided with the main air intake passage (51) connected with multiple dryer air inlets (56), and top is provided with and multiple dryer exhaust outlets
(54) the main air exhaust passage (55) of connection, the main air intake passage (51) connects with hot air duct (2), the main air exhaust passage
(55) connect with discharge duct (6).
10. rotary kiln gas recovery system according to claim 9, it is characterised in that sets in the coal briquette dryer (5)
There are the multiple branch air channels (52) for connecting with multiple dryer air inlets (56) respectively, on each branch air channel (52) along its length
Multiple hot blast discharge pipes (53) are connected with, multiple exhaust vents are distributed with each hot blast discharge pipe (53).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611112261.8A CN106642180B (en) | 2016-12-06 | 2016-12-06 | A kind of fire coal boiler fume secondary recovery control oxygen flame retardant systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611112261.8A CN106642180B (en) | 2016-12-06 | 2016-12-06 | A kind of fire coal boiler fume secondary recovery control oxygen flame retardant systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106642180A true CN106642180A (en) | 2017-05-10 |
| CN106642180B CN106642180B (en) | 2019-01-04 |
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ID=58818548
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611112261.8A Active CN106642180B (en) | 2016-12-06 | 2016-12-06 | A kind of fire coal boiler fume secondary recovery control oxygen flame retardant systems |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126721A (en) * | 1979-03-20 | 1980-09-30 | Babcock Hitachi Kk | Low calorie gas combustion disposal facility |
| DE3519951C1 (en) * | 1985-06-04 | 1992-07-02 | Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart | Process for reducing the emission of dust, SO2 and NOx of a steam generator having a flue gas denitration plant |
| US5660148A (en) * | 1991-09-12 | 1997-08-26 | Imatran Voima Oy | Method and device in the cooling of the circulating material in a fluidized-bed boiler |
| EP2116765A2 (en) * | 2008-05-07 | 2009-11-11 | Hitachi, Ltd. | Oxyfuel boiler system and method of retrofit of air fired boiler to oxyfuel boiler |
| CN103003632A (en) * | 2010-06-16 | 2013-03-27 | 三菱重工业株式会社 | Combustion system |
| CN204478025U (en) * | 2015-03-09 | 2015-07-15 | 李毅强 | Fire coal boiler fume two-phase method denitrification apparatus |
| CN104964274A (en) * | 2015-07-02 | 2015-10-07 | 山东建筑大学 | Smoke waste heat recovery and re-circulating temperature adjusting method and system of natural gas oxygen-rich combustion 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 |
| CN206291225U (en) * | 2016-12-06 | 2017-06-30 | 丹东同合高新科技有限公司 | Fire coal boiler fume secondary recovery control oxygen flame retardant systems |
-
2016
- 2016-12-06 CN CN201611112261.8A patent/CN106642180B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55126721A (en) * | 1979-03-20 | 1980-09-30 | Babcock Hitachi Kk | Low calorie gas combustion disposal facility |
| DE3519951C1 (en) * | 1985-06-04 | 1992-07-02 | Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart | Process for reducing the emission of dust, SO2 and NOx of a steam generator having a flue gas denitration plant |
| US5660148A (en) * | 1991-09-12 | 1997-08-26 | Imatran Voima Oy | Method and device in the cooling of the circulating material in a fluidized-bed boiler |
| EP2116765A2 (en) * | 2008-05-07 | 2009-11-11 | Hitachi, Ltd. | Oxyfuel boiler system and method of retrofit of air fired boiler to oxyfuel boiler |
| CN103003632A (en) * | 2010-06-16 | 2013-03-27 | 三菱重工业株式会社 | Combustion system |
| CN204478025U (en) * | 2015-03-09 | 2015-07-15 | 李毅强 | Fire coal boiler fume two-phase method denitrification apparatus |
| CN104964274A (en) * | 2015-07-02 | 2015-10-07 | 山东建筑大学 | Smoke waste heat recovery and re-circulating temperature adjusting method and system of natural gas oxygen-rich combustion 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 |
| CN206291225U (en) * | 2016-12-06 | 2017-06-30 | 丹东同合高新科技有限公司 | Fire coal boiler fume secondary recovery control oxygen flame retardant systems |
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| Publication number | Publication date |
|---|---|
| CN106642180B (en) | 2019-01-04 |
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