CN207990606U - A kind of boiler is for exhaust system - Google Patents
A kind of boiler is for exhaust system Download PDFInfo
- Publication number
- CN207990606U CN207990606U CN201820118269.3U CN201820118269U CN207990606U CN 207990606 U CN207990606 U CN 207990606U CN 201820118269 U CN201820118269 U CN 201820118269U CN 207990606 U CN207990606 U CN 207990606U
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- China
- Prior art keywords
- boiler
- air
- fan
- cyclone separator
- returning charge
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Abstract
A kind of boiler of the utility model offer is for exhaust system, belong to power boiler energy-saving field, its structure includes boiler, primary air fan, overfire air fan equipped with burner hearth, the top smoke outlet of boiler connects cyclone separator, the top exhanst gas outlet of cyclone separator is discharged after boiler induced-draft fan, desulfurizing tower by chimney, the lower part of cyclone separator connects material returning device by connected returning charge leg, which accesses lower furnace portion side wall by falling grey inclined tube；Above-mentioned boiler induced-draft fan outlet picks out cycle flue all the way, and is connected on the air inlet pipeline of primary air fan by cycle flue.This patent reduces First air oxygen content using circulating flue gas method, and circulating flue gas is used under the premise of ensureing boiler emulsion zone normal combustion and fluidisation, the oxygen content of First air is reduced as possible, inhibits the generation of nitrogen oxides；Room under material returning device is divided by demarcation strip and loosens air compartment and returning charge air compartment, each leads into and loosens wind and returning charge wind, prevent the case where returning charge is accumulated at grid plate hood.
Description
Technical field
The utility model is related to power boiler field of energy-saving technology, specifically a kind of boiler is for exhaust system.
Background technology
Boiler is a kind of energy conversion, and the energy inputted to boiler has chemical energy, electric energy in fuel, boiler output
Steam, high-temperature water with certain thermal energy or organic heat carrier.The hot water or steam generated in boiler can directly be industrial production
Required thermal energy is provided with people's lives, mechanical energy can be also converted to by Steam Power Equipment, or again will be mechanical by generator
Electric energy can be converted to.
Existing boiler deposit when in use there is a problem in that：First air high oxygen content, the original flue gas nitrogen oxide of boiler
Concentration is high.Since nitrogen oxides is very big to the detrimental effect of environment, it is both to form one of main matter of acid rain, and formed
The important substance of photochemical fog and consumption O in air3An important factor, for realize it is environmentally protective, needed before discharge into
Row denitration process.However the original flue gas nitrogen oxide concentration of boiler is high, denitration energy consumption is larger, and corresponding construction investment cost is larger,
It cannot achieve the needs of energy-saving and emission-reduction.The reducing energy consumption of the future developing trend of boiler, Industrial Boiler is imperative.
Invention content
The technical assignment of the utility model is in view of the deficiencies of the prior art, to provide a kind of boiler for exhaust system, solve
First air high oxygen content existing in the prior art, the highly concentrated problem of the original flue gas nitrogen oxide of boiler.
Technical solution adopted by the utility model to solve its technical problems is：
A kind of boiler for exhaust system, include the boiler equipped with burner hearth, the primary air fan for providing First air to boiler,
Overfire air fan for providing from Secondary Air to boiler,
The top smoke outlet of the boiler connects cyclone separator, and the top exhanst gas outlet of cyclone separator is through boiler draft
It is discharged by chimney after machine, desulfurizing tower, the lower part of cyclone separator connects material returning device by connected returning charge leg, which passes through
Fall grey inclined tube access lower furnace portion side wall；
Above-mentioned boiler induced-draft fan outlet picks out cycle flue all the way, and the blast pipe of primary air fan is connected to by cycle flue
On the road.
It is further improved as the utility model, in the material returning device, the lower section that falls grey inclined tube be equipped with grid plate hood,
Material returning device is separated into upper and lower room by grid plate hood, this is lower indoor equipped with a demarcation strip, and lower room is divided into and loosens air compartment and returns
Expect air compartment, each leads into and loosen wind and returning charge wind.
It is further improved as the utility model, what the boiler induced-draft fan outlet was connected with primary air fan air inlet pipeline
Cycle flue is equipped with：For monitoring the flowmeter of flue gas flow, the flue suspension and support for being used to support flue, for solving flue
The expansion joint of expansion, the baffle door for adjusting flue gas flow.
Further improved as the utility model, the loosening air compartment and returning charge air compartment air inlet are respectively connected to Roots and return
Expect that wind turbine, Roots's material return blower export nature cold wind, is provided for material returning device and loosen wind and returning charge wind.
It is further improved as the utility model, the top exhanst gas outlet of the cyclone separator and boiler induced-draft fan it
Between connect electrostatic precipitator.
Further improved as the utility model, the lower furnace portion is equipped with fire grate, and primary air fan passes through primary air piping
It accesses in the burner hearth below fire grate, overfire air fan is accessed by secondary air channel in the burner hearth above fire grate.
It is further improved as the utility model, before the cyclone separator, the material returning device being connected with cyclone separator
Two sets are arranged afterwards, the top exhanst gas outlet of front and back two sets of cyclone separators merges, and is discharged by chimney after boiler induced-draft fan.
Further improved as the utility model, the primary air fan uses frequency control, another to add to adjust air quantity
The diameter of returning charge air hose, increases returning charge air quantity greatly between returning charge air compartment and Roots's material return blower.
A kind of boiler of the utility model is for exhaust system, and generated advantageous effect is compared with prior art：
1, cycle flue all the way is picked out from boiler induced-draft fan outlet, the air inlet pipeline of primary air fan is connected to by cycle flue
On, First air oxygen content is reduced using circulating flue gas method, under the premise of ensureing boiler emulsion zone normal combustion and fluidisation
Using circulating flue gas, the oxygen content of First air is reduced as possible, inhibits the generation of nitrogen oxides；
2, it is equipped on the cycle flue that boiler induced-draft fan outlet is connected with primary air fan air inlet pipeline：Flowmeter, flue
Suspension and support, expansion joint, baffle door, for regulating and controlling flue gas recirculation air quantity, when production operation, rational proportion primary and secondary air, air inducing
Air quantity makes to keep rational burner hearth pressure difference in boiler furnace；
3, room under material returning device is divided by demarcation strip and loosens air compartment and returning charge air compartment, each led into and loosen wind and returning charge
Wind prevents the case where returning charge is accumulated at grid plate hood；
4, it increases Roots's material return blower newly, increases returning charge amount, sufficient dynamic head is provided, in addition, Roots's material return blower provides
150 DEG C of the returning charge hot wind that Secondary Air introduces in former design is transformed into nature cold wind by natural cold wind, is reduced warm in material returning device
Degree, avoids coking of material returner, realizes normal returning charge, reduces the temperature distribution gradients in burner hearth, plays the material envelope function of material returning device,
It effectively prevent fluidising chamber's high-head flue gas short-circuit, it is established that normal Matter Transfer detaches returning charge system, improves boiler output energy
Power；
5, using the technical solution of the utility model, flue gas nitrogen oxide initial concentration is down to 280 mg/m by 420mg/m3
3, year saves 170 tons of denitrfying agent, saves money 11.9 ten thousand yuan.
Description of the drawings
Attached drawing 1 is structure chart of the utility model boiler for exhaust system.
In figure, 1, boiler, 2, electrostatic precipitator, 3, boiler induced-draft fan, 4, desulfurizing tower, 5, chimney, 6, cycle flue, 6.1,
Flowmeter, 6.2, flue suspension and support, 6.3, expansion joint, 6.4, baffle door, 7, primary air fan, 8, Roots's material return blower, 9, secondary
Wind turbine, 10, cyclone separator, 11, fire grate, 12, material returning device, 12.1, grid plate hood, 12.2, loosen air compartment, 12.3, returning charge
Air compartment, 12.4, returning charge leg, 12.5, demarcation strip, 13, fall grey inclined tube.
Specific implementation mode
Below in conjunction with the accompanying drawings 1, a kind of boiler of the utility model is described in detail below for exhaust system.
As shown in Fig. 1, a kind of boiler of the utility model is for exhaust system, include boiler 1 equipped with burner hearth, for
Boiler 1 provides the primary air fan 7 of First air, the overfire air fan 9 for providing Secondary Air to boiler 1.
The top smoke outlet of boiler 1 connects cyclone separator 10, and the top exhanst gas outlet of cyclone separator 10 draws through boiler
It is discharged by chimney 5 after wind turbine 3, desulfurizing tower 4, the lower part of cyclone separator 10 connects material returning device by connected returning charge leg 12.4
12, which accesses lower furnace portion side wall by falling grey inclined tube 13.
Above-mentioned lower furnace portion is equipped with fire grate 11, and primary air fan 7 is accessed by primary air piping in the burner hearth of 11 lower section of fire grate, and two
Secondary wind turbine 9 is accessed by secondary air channel in the burner hearth of 11 top of fire grate.
The outlet of above-mentioned boiler induced-draft fan 3 picks out cycle flue 6 all the way, and by cycle flue 6 be connected to primary air fan 7 into
On air pipe line.First air oxygen content is reduced using circulating flue gas method, is ensureing 1 emulsion zone normal combustion of boiler and fluidisation
Under the premise of use circulating flue gas, as possible reduce First air oxygen content, inhibit the generation of nitrogen oxides.
To avoid there is a situation where returning charges from being accumulated at grid plate hood 12.1, in one embodiment of the utility model
In, in material returning device 12, the lower section that falls grey inclined tube 13 be equipped with grid plate hood 12.1, grid plate hood 12.1 separates material returning device 12
At upper and lower room, this is lower indoor equipped with a demarcation strip 12.5, and lower room is divided into loosening air compartment 12.2 and returning charge air compartment 12.3, point
It is not passed through and loosens wind and returning charge wind.
For ease of regulate and control flue gas recirculation air quantity, in one embodiment of the utility model, boiler induced-draft fan 3 outlet with
The connected cycle flue 6 of 7 air inlet pipeline of primary air fan is equipped with：For monitoring the flowmeter 6.1 of flue gas flow, being used to support cigarette
The flue suspension and support 6.2 in road, the expansion joint 6.3 for solving expansion of flue, the baffle door 6.4 for adjusting flue gas flow.
To increase returning charge amount, sufficient dynamic head is provided, 12 coking of material returning device is avoided, realizes normal returning charge, to reduce nitrogen
Oxide content loosens air compartment 12.2 and 12.3 air inlet of returning charge air compartment connects respectively in one embodiment of the utility model
Enter Roots's material return blower 8, Roots's material return blower 8 exports nature cold wind, is provided for material returning device 12 and loosens wind and returning charge wind.
To further decrease amount of nitrogen oxides, in one embodiment of the utility model, cyclone separator 10 it is upper
Electrostatic precipitator 2 is connected between portion's exhanst gas outlet and boiler induced-draft fan 3, goes sulphur removal to aoxidize from flue gas using corona discharge
Object and nitrogen oxides.
To increase returning charge amount, fully burning is realized, to reduce amount of nitrogen oxides, in one embodiment of the utility model
In, front and back two sets of the setting of cyclone separator 10, the material returning device 12 being connected with cyclone separator 10, front and back two sets of cyclone separators 10
Top exhanst gas outlet merge, be discharged by chimney 5 after boiler induced-draft fan 3.
In the utility model, if independent returning charge roots blower, by adjusting returning charge wind and loosening on wind air inlet pipeline
Valve opening adjust air quantity；Flue gas recirculation system is set, and the outlet of boiler induced-draft fan 3 is positive pressure, the import of primary air fan 7
For negative pressure, exports to 7 inlet of primary air fan from boiler induced-draft fan 3 and increase cycle flue 6 newly, mainly there is attachment on cycle flue 6：
The flowmeter 6.1 for monitoring flue gas flow, the expansion joint 6.3 for solving expansion of flue, is adjusted the flue suspension and support 6.2 for supporting flue
The baffle door 6.4 of flue gas flow.Primary air fan 7 uses frequency control, to adjust air quantity.
When production operation, rational proportion primary and secondary air, air inducing air quantity make to keep rational burner hearth pressure in 1 burner hearth of boiler
Difference；Returning charge wind pressure is controlled, 10 ash of cyclone separator is made to drop down onto material returning device 12；Increase returning charge air compartment 12.3 and Roots's material return blower 8
Between returning charge air hose diameter, increase returning charge air quantity.
It is the known technology of those skilled in the art in addition to the technical characteristic described in specification.
Claims (7)
1. a kind of boiler for exhaust system, includes the boiler equipped with burner hearth, the primary air fan for providing First air to boiler, uses
In the overfire air fan for providing Secondary Air to boiler, which is characterized in that
The top smoke outlet of the boiler connects cyclone separator, the top exhanst gas outlet of cyclone separator through boiler induced-draft fan,
It is discharged by chimney after desulfurizing tower, the lower part of cyclone separator connects material returning device by connected returning charge leg, and the material returning device is by falling
Grey inclined tube accesses lower furnace portion side wall；
Above-mentioned boiler induced-draft fan outlet picks out cycle flue all the way, and the air inlet pipeline of primary air fan is connected to by cycle flue
On.
2. a kind of boiler according to claim 1 is for exhaust system, which is characterized in that in the material returning device, fall grey inclined tube
Lower section be equipped with grid plate hood, material returning device is separated into upper and lower room by grid plate hood, this it is lower it is indoor be equipped with a demarcation strip, will
Lower room, which is divided into, loosens air compartment and returning charge air compartment, each leads into and loosens wind and returning charge wind.
3. a kind of boiler according to claim 2 is for exhaust system, which is characterized in that the loosening air compartment and returning charge air compartment
Air inlet is respectively connected to Roots's material return blower, and Roots's material return blower exports nature cold wind, is provided for material returning device and loosens wind and returning charge
Wind.
4. a kind of boiler according to claim 1,2 or 3 is for exhaust system, which is characterized in that the boiler induced-draft fan goes out
The cycle flue that mouth is connected with primary air fan air inlet pipeline is equipped with：For monitoring the flowmeter of flue gas flow, being used to support cigarette
Flue suspension and support, the expansion joint for solving expansion of flue, the baffle door for adjusting flue gas flow in road.
5. a kind of boiler according to claim 1,2 or 3 is for exhaust system, which is characterized in that the cyclone separator
Electrostatic precipitator is connected between top exhanst gas outlet and boiler induced-draft fan.
6. a kind of boiler according to claim 1,2 or 3 is for exhaust system, which is characterized in that the lower furnace portion is equipped with
Fire grate, primary air fan are accessed by primary air piping in the burner hearth below fire grate, and overfire air fan is accessed by secondary air channel on fire grate
In the burner hearth of side.
7. a kind of boiler according to claim 1,2 or 3 is for exhaust system, which is characterized in that the cyclone separator, with
Front and back two sets of the setting of the connected material returning device of cyclone separator, the top exhanst gas outlet of front and back two sets of cyclone separators merges, through pot
It is discharged by chimney after stove air-introduced machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820118269.3U CN207990606U (en) | 2018-01-24 | 2018-01-24 | A kind of boiler is for exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820118269.3U CN207990606U (en) | 2018-01-24 | 2018-01-24 | A kind of boiler is for exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207990606U true CN207990606U (en) | 2018-10-19 |
Family
ID=63821085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820118269.3U Expired - Fee Related CN207990606U (en) | 2018-01-24 | 2018-01-24 | A kind of boiler is for exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207990606U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185874A (en) * | 2018-10-31 | 2019-01-11 | 袁世杰 | A kind of boiler material-returning device |
-
2018
- 2018-01-24 CN CN201820118269.3U patent/CN207990606U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185874A (en) * | 2018-10-31 | 2019-01-11 | 袁世杰 | A kind of boiler material-returning device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181019 Termination date: 20220124 |
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| CF01 | Termination of patent right due to non-payment of annual fee |