CN201310878Y - Coal-burning boiler - Google Patents
Coal-burning boiler Download PDFInfo
- Publication number
- CN201310878Y CN201310878Y CNU2008201679560U CN200820167956U CN201310878Y CN 201310878 Y CN201310878 Y CN 201310878Y CN U2008201679560 U CNU2008201679560 U CN U2008201679560U CN 200820167956 U CN200820167956 U CN 200820167956U CN 201310878 Y CN201310878 Y CN 201310878Y
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- CN
- China
- Prior art keywords
- flue gas
- coal
- adjuster
- gas recirculation
- burning boiler
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Abstract
A coal-burning boiler comprises a furnace body and a fire grate, wherein the lower side of the fire grate is provided with a lower blower which is communicated with a combustion chamber on the furnace bottom, and smoke gas in a furnace body enters a dust remover through a high-temperature heating surface and a low-temperature heating surface. The cola-burning boiler is characterized in that the lower side of the dust remover is connected with a first smoke gas recycling pipeline which is provided with a recycling blower and is communicated with the lower blower through a gas pipe, smoke gas is mixed with burning air at the bottom of the furnace to enter the combustion chamber on the furnace bottom, the gas pipe is provided with a flow capacity control regulator, the first smoke gas recycling pipeline is provided with a first isolator and a regulator for isolating and regulating the quantity of smoke gas, the first smoke gas recycling pipeline is connected with a second smoke gas recycling pipeline with a second isolator and a regulator, and the second smoke gas recycling pipeline is communicated with a hearth through an upper layer fan, and the isolators, the regulators and the recycling blowers are provided with interlocking devices. The coal-burning boiler can improve the efficiency of boilers, can simultaneously reduce dust and lower the discharge of smoke gas blackness and NOX, and can reconstruct existing coal-burning boilers with different types and volumes.
Description
Technical field
The utility model relates to a kind of coal-burning boiler field, specifically refers to a kind ofly not only can improve described coal-burning boiler efficient but also can reduce flue dust and NO
XThe coal-burning boiler of discharging; It is specially adapted to transform existing machinery formula coal-burning boiler to reduce the pollution of surrounding environment and to increase its efficient and exert oneself.
Background technology
The structure of prior mechanical coal-burning boiler includes body of heater and high-temperature surface that is connected and low temperature heating surface, and this body of heater bottom is provided with fire grate, and this fire grate top is provided with burner hearth; This fire grate downside is provided with air blast, and this air blast communicates with the furnace bottom combustion chamber.The flue gas of described burner hearth enters a deduster by described high-temperature surface and described low temperature heating surface, and this deduster discharges the dust in the described flue gas by chimney.
The soot particle that is limited by the factor of excess air during the operation of above-mentioned mechanical type coal-burning boiler and causes boiler smoke to carry is more, is difficult to control the over-emitting black exhaust phenomenon simultaneously, forms NO
XExcessive emissions cause pollution to surrounding environment; Next is that the burner hearth flue gas of prior mechanical coal-burning boiler directly discharges by chimney, do not take to recycle, thereby its technical economic benefit is lower, can not adapt to the demand of modern industry again.
The utility model content
Technical problem to be solved in the utility model is the situation at prior art, provides a kind of when not only can improve described coal-burning boiler efficient but also can reduce flue dust, reduce blackness of exhaustion and NO
XThe coal-burning boiler of discharging.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of coal-burning boiler, comprise body of heater and high-temperature surface that is connected and low temperature heating surface, and this body of heater bottom is provided with fire grate, and this fire grate top is provided with burner hearth; This fire grate downside is provided with down air blast, this time air blast communicates with the furnace bottom combustion chamber, the flue gas of described burner hearth enters a deduster by described high-temperature surface and described low temperature heating surface, it is characterized in that: described deduster downside is connected with the first flue gas recirculation pipeline, this first flue gas recirculation pipeline is provided with recirculation blower and is connected with described air blast down by appendix, and described flue gas and furnace bottom combustion air are mixed into described furnace bottom combustion chamber.
The utility model is because the downside of deduster connects the flue gas recirculation pipeline, and flue gas and furnace bottom combustion air are mixed into the furnace bottom combustion chamber by recycling fan, it will take away more heat from burner hearth, the mechanical type coal-burning boiler can be moved under lower excess air, the boiler smoke flow velocity is reduced, thereby the soot particle that original boiler smoke is carried reduce.
Described appendix can be provided with the flow-control adjuster; Its effect is control and the flue gas of breaking off entering the furnace bottom combustion chamber.
Can be provided with on the described first flue gas recirculation pipeline and isolate and the first isolated and adjuster of regulating exhaust gas volumn; Should isolated effect be the exhaust gas volumn that control enters down air blast with adjuster, and when the inactive flue gas recirculation function of the present utility model of selection to isolate this system.
Be connected with the second flue gas recirculation pipeline on the described first flue gas recirculation pipeline and at the described first isolated rear portion with adjuster, this second flue gas recirculation pipeline is connected with described burner hearth by a upper strata blower fan; Its effect is to reduce the soot particle that boiler smoke carries equally.
The described second flue gas recirculation pipeline can be provided with and be used to control the second isolated and adjuster that enters described burner hearth exhaust gas volumn; Its function is that control enters the exhaust gas volumn of described burner hearth or isolates the ducted flue gas of this second flue gas recirculation.
But the described second flue gas recirculation pipeline is the isolated airduct road, outside upper strata with adjuster of tape splicing the 3rd also, and this airduct road, upper strata, outside is positioned at the rear portion of described second isolated and the adjuster, to expand the input channel in overfire air source.
Described first isolated is provided with interlock with adjuster and described recycling fan.Its effect is in the time of can avoiding recycling fan to break down, and first isolated closes automatically with adjuster, realizes reliability of operation and security.
Described second isolated the completely cutting off with adjuster and described upper strata blower fan with adjuster, the described the 3rd was provided with interlock.Its effect is in the time of can avoiding the upper strata blower fan to break down, and the second and the 3rd isolated closes automatically with adjuster, realizes reliability of operation and security.
The utility model is owing to set up a cover flue gas recirculation device on the structure of prior mechanical coal-burning boiler, compared with prior art, its advantage is to improve boiler efficiency, also can reduce NO simultaneously
XDischarging; Can to existing dissimilar and capacity add coal burning boiler transformation, to promote its economy and technique effect and to alleviate pollution to environment.
Description of drawings
Fig. 1 is the utility model system configuration schematic diagram;
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of coal-burning boiler, the high-temperature surface 11 and low temperature heating surface 12 that comprise body of heater 1 and be connected, this body of heater bottom is provided with fire grate 2, this fire grate top is provided with burner hearth 3, and this fire grate downside is provided with down air blast 4, and it communicates with furnace bottom combustion chamber 21; The flue gas of burner hearth 3 enters a deduster 7 by high-temperature surface 11 and low temperature heating surface 12; These deduster 7 downsides are connected with the first flue gas recirculation pipeline 9, and this first flue gas recirculation pipeline is provided with recirculation blower 10 and is connected with following air blast 4 by appendix 22, and flue gas and furnace bottom combustion air are mixed into furnace bottom combustion chamber 21.
Be positioned at the body of heater outside and above fire grate 2, be provided with feeding system 5, this feeding system is delivered to coal or other waste combustible materials matter on the fire grate 2 and is carried out ignition, when coal burns in burner hearth 3, the high-temperature surface 11 that the high-temperature flue gas that produces on burner hearth 3 tops enters band steam tube and heating tube enters deduster 7 again with low temperature heating surface 12, and produces steam; Arrow illustrates the passage that flue gas is flowed through among Fig. 1.
Inventive point of the present utility model is that the downside of deduster 7 is connected with the first flue gas recirculation pipeline 9, and this first flue gas recirculation pipeline 9 is connected by the air blast 4 of recycling fan 10 with fire grate 2 downsides; Flue gas and furnace bottom combustion air are mixed into furnace bottom combustion chamber 21, because the specific heat of flue gas is big than air, so it will take away more heat from burner hearth, temperature peak can be reduced, therefore, the mechanical type coal-burning boiler can move under lower excess air, and excess air descends, the boiler smoke flow velocity is reduced, and the soot particle that original boiler smoke is carried reduces.
Flue gas is connected with following air blast 4 by appendix 22, and flue gas and furnace bottom combustion air are mixed into furnace bottom combustion chamber 21.
The first flue gas recirculation pipeline 9 is provided with the first isolated and adjuster 13, and this completely cuts off and adjuster 13 is to be used to control the exhaust gas volumn that enters down air blast 4; And when select stopping using flue gas recirculation function of the present utility model to isolate this system.
Be connected with the second flue gas recirculation pipeline 14 on the first flue gas recirculation pipeline 9 and at the first isolated rear portion with adjuster 13, this second flue gas recirculation pipeline 14 is connected with burner hearth 3 by a upper strata blower fan 15; The second flue gas recirculation pipeline 14 is provided with second isolated and the adjuster 16, and this second isolated and adjuster 16 are to be used to control the exhaust gas volumn that enters described burner hearth 3; And when select stopping using flue gas recirculation function of the present utility model, can isolate this system.
Can also connecting band on the second flue gas recirculation pipeline 14 and at the rear portion of second isolated and the adjuster 16 the airduct road, outside upper strata 18 of the 3rd isolated and adjuster 17, this airduct road, upper strata, outside 18 also is connected with burner hearth 3 by described upper strata blower fan 15; Enter the upper strata air quantity of burner hearth 3 with adjusting, further promote to promote heat energy productivity ratio of the present utility model.
The flue gas of the utility model burner hearth 3 enters deduster 7 by high-temperature surface 11 and low temperature heating surface 12, this deduster 7 with the dust in the described flue gas by chimney 8 when effluxing, utilize that remaining flue gas heat energy mixes with the combustion air that following air blast 4 exports in deduster 7; Adopt the ducted isolated and controller structure of a plurality of flue gas recirculation simultaneously, thereby the flue gas recirculation system and device all can completely cut off and close in any case, original mode that can realize coal-burning boiler in very short time continues operation, and follows original air quantity and load relation.
First of the first flue gas recirculation pipeline completely cuts off and adjuster 13 is provided with interlock with recycling fan 10, and before the electrical power of recycling fan 10, first completely cuts off with adjuster 13 and can not open; When recycling fan 10 broke down, first completely cut off with adjuster 13 and will close automatically.
Similarly, second isolated is provided with interlock with adjuster 16 and upper strata blower fan 15, and before the electrical power of upper strata blower fan 15, second isolatedly can not open with adjuster 16; When upper strata blower fan 15 broke down, second completely cut off with adjuster 16 and will close automatically.
The executing agency of the regulating element of the isolated and adjuster of flue gas recirculation of the present utility model is connected with the control signal in the control room of described coal-burning boiler.The isolated regulating element with adjuster of this flue gas recirculation is optional with manually-operated or automatic control mode.
Regulating element in flue gas recirculation pipeline of the present utility model and pipe joint thereof, isolated and the adjuster must be with the wear-resisting steel making of high-quality, to guarantee its operating accuracy and service life.
The utility model is provided with described flue gas EGR in coal-burning boiler, thereby forms a kind of coal-burning boiler of high thermal efficiency; The flue gas recirculation system and device can completely cut off rapidly again and close simultaneously, thereby has widened the flexibility that boiler uses.
The utility model can improve boiler efficiency and reduce flying dust and slag in combustible and reduce soot particle, blackness and NO
XDischarge capacity to the pollution of environment.It especially is suitable for transforming existing use outmoded coal-burning boiler for many years.
Claims (8)
1, a kind of coal-burning boiler, the high-temperature surface (11) and low temperature heating surface (12) that comprise body of heater (1) and be connected, this body of heater (1) bottom is provided with fire grate (2), and this fire grate (2) top is provided with burner hearth (3); This fire grate (2) downside is provided with down air blast (4), this time air blast (4) communicates with furnace bottom combustion chamber (21), the flue gas of described burner hearth (3) enters a deduster (7) by described high-temperature surface (11) and described low temperature heating surface (12), it is characterized in that: described deduster (7) downside is connected with the first flue gas recirculation pipeline (9), this first flue gas recirculation pipeline (9) is provided with recirculation blower (10) and also is connected with described air blast (4) down by appendix (22), and described flue gas and described furnace bottom combustion air are mixed into described furnace bottom combustion chamber (21).
2, coal-burning boiler according to claim 1 is characterized in that: described appendix (22) is provided with flow-control adjuster (20).
3, coal-burning boiler according to claim 1 is characterized in that: the described first flue gas recirculation pipeline (9) is provided with isolates and the first isolated and adjuster (13) of regulating exhaust gas volumn.
4, coal-burning boiler according to claim 3, it is characterized in that: the described first flue gas recirculation pipeline (9) is gone up and is connected with the second flue gas recirculation pipeline (14) at the described first isolated rear portion with adjuster (13), and this second flue gas recirculation pipeline (14) is connected with described burner hearth (3) by a upper strata blower fan (15).
5, coal-burning boiler according to claim 4 is characterized in that: the described second flue gas recirculation pipeline (14) is provided with and is used to control the second isolated and adjuster (16) that enters described burner hearth exhaust gas volumn.
6, coal-burning boiler according to claim 5, it is characterized in that: the described second flue gas recirculation pipeline (14) also is connected to airduct road, outside upper strata (18) with the 3rd isolated and adjuster (17), and this airduct road, upper strata, outside (18) is positioned at the rear portion of described second isolated and the adjuster (16).
7, according to claim 1 or 4 described coal-burning boilers, it is characterized in that: described first isolated is provided with interlock with adjuster (13) and described recycling fan (10).
8, according to claim 4 or 6 described coal-burning boilers, it is characterized in that: described second isolated the completely cutting off with adjuster (17) and described upper strata blower fan (15) with adjuster (16), the described the 3rd was provided with interlock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201679560U CN201310878Y (en) | 2008-11-24 | 2008-11-24 | Coal-burning boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201679560U CN201310878Y (en) | 2008-11-24 | 2008-11-24 | Coal-burning boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201310878Y true CN201310878Y (en) | 2009-09-16 |
Family
ID=41108130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201679560U Expired - Lifetime CN201310878Y (en) | 2008-11-24 | 2008-11-24 | Coal-burning boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201310878Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506418A (en) * | 2011-10-19 | 2012-06-20 | 山东大学 | Low emission high efficiency grate-firing combustion device and method |
-
2008
- 2008-11-24 CN CNU2008201679560U patent/CN201310878Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506418A (en) * | 2011-10-19 | 2012-06-20 | 山东大学 | Low emission high efficiency grate-firing combustion device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090916 Effective date of abandoning: 20131125 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |