CN106958808A - Low NO with steam manifoldXDouble drum gas fired-boilers - Google Patents
Low NO with steam manifoldXDouble drum gas fired-boilers Download PDFInfo
- Publication number
- CN106958808A CN106958808A CN201710311339.7A CN201710311339A CN106958808A CN 106958808 A CN106958808 A CN 106958808A CN 201710311339 A CN201710311339 A CN 201710311339A CN 106958808 A CN106958808 A CN 106958808A
- Authority
- CN
- China
- Prior art keywords
- drum
- economizer
- steam
- heat exchange
- boilers
- 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.)
- Pending
Links
- 239000007789 gas Substances 0.000 claims abstract description 40
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000000779 smoke Substances 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 18
- 239000002737 fuel gas Substances 0.000 description 8
- 239000000567 combustion gas Substances 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000004072 lung Anatomy 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 208000006673 asthma Diseases 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/22—Drums; Headers; Accessories therefor
- F22B37/221—Covers for drums, collectors, manholes or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
Abstract
The invention discloses a kind of low NO with steam manifoldXDouble drum gas fired-boilers, including：Burner hearth, convection cell, upper and lower drum, burner hearth is connected with convection cell, burner is provided with the lighting-up tuyere of burner hearth, burner is connected with blast pipe and Gas Pipe respectively, and convection cell is communicated with heat exchange housing, heat exchange housing and is provided with economizer, chimney is provided with the top of heat exchange housing, backflow flue is communicated with the heat exchange housing of economizer exhaust end, backflow flue is connected by circulating fan with blast pipe, and the flue gas discharged from economizer can be delivered in blast pipe by circulating fan；Steam manifold is provided with the top of upper drum, if being connected between upper drum and steam manifold by dry saturated steam fairlead, steam output pipe is provided with steam manifold.It is an advantage of the invention that：Can be by from the NO in the flue gas of smoke stack emissionXConcentration be reduced to 30 mg/m3, and boiler efficiency can be greatly improved, moreover it is possible to greatly improve the quality of the saturated vapor of output.
Description
Technical field
The present invention relates to double drum gas fired-boilers.
Background technology
Traditional double drum gas fired-boilers, its structure includes：Set between burner hearth, convection cell, upper and lower drum, upper and lower drum
Convection bank is equipped with, burner hearth is connected with convection cell, upper and lower drum is separately positioned on the top and bottom of convection cell, upper drum
On be provided with the top of steam output pipe, convection cell and be also associated with chimney, the convection bank between upper and lower drum is located at convection cell
It is interior, burner is provided with the lighting-up tuyere of burner hearth, burner is respectively with conveying the blast pipe of air and the Gas Pipe of delivery of fuel gas
It is connected.During work, air is entered in burner with combustion gas and mixed, and mixed gas is after burner ignition in burner hearth internal combustion
Burn, the high-temperature flue gas that burning is produced enters in convection cell and carries out heat exchange with convection bank, complete the gas of heat exchange from
Discharge, the water in convection bank is entered in upper drum by the steam water interface of thermosetting, formed in upper drum in chimney
Saturated vapor discharged from steam output pipe.
Nitrogen oxides certainly will be produced during fuel gas buring（NOX）, nitrogen oxides is mainly including nitric oxide, nitrogen dioxide
Deng.The nitrogen oxides being emitted into air can be with the water reaction generation nitric acid and nitrous acid in air, and nitric acid and nitrous acid are just
It is the main component of acid rain.Nitrogen oxides can stimulate human lung, damage human respiratory tract, cause human respiratory tract to infect, right
The influence of asthma sufferer is particularly evident.Nitrogen oxides can also cause the development of children lung impaired.Therefore nitrogen oxides is reduced（NOX）
Discharge capacity be to improve the very urgent major issue of environment.
The defect of traditional double drum gas fired-boilers is：First, the NO in the flue gas discharged from chimneyXContent 100
~150mg/m3, although meet discharging standards, but for the area of the high discharge standard such as Beijing, it is also significantly exceeded.
2nd, the utilization rate for the heat energy that fuel gas buring is produced is low.3rd, the saturated vapor in upper drum is outwards defeated by steam output pipe
Go out, because upper drum is very long, therefore saturated vapor flow velocity in the upper drum near from steam output pipe is big, easy band water, and from steaming
Saturated vapor flow velocity in the remote upper drum of vapour efferent duct is relatively slow, and this causes the saturated vapor exported from steam output pipe
Aqueous inequality, water content is big, and steam quality is not good.
The content of the invention
The purpose of the present invention is：NO can effectively be reduced by providing one kindXDischarge capacity simultaneously can greatly improve saturated vapor quality
Double drum gas fired-boilers.
To achieve the above object, the technical solution adopted by the present invention is：Low NO with steam manifoldXDouble drum gas fired-boilers,
Including：Convection bank is provided between burner hearth, convection cell, upper and lower drum, upper and lower drum, burner hearth is connected with convection cell, upper,
Lower drum is separately positioned on the convection bank between the top and bottom of convection cell, upper and lower drum in convection cell, burner hearth
Burner is provided with lighting-up tuyere, burner is connected with blast pipe and Gas Pipe respectively, and convection cell is communicated with heat exchange housing, changes
The flue gas entrance for being provided with the top of economizer, heat exchange housing and heat exchange being completed in chimney, convection cell is provided with hot housing
Carry out being communicated with backflow flue on heat exchange, the heat exchange housing of economizer exhaust end in heat exchange housing and with economizer, flow back
Flue is connected by circulating fan with blast pipe, and the flue gas discharged from economizer can be delivered to blast pipe by circulating fan
In；Steam manifold is fixedly installed at the top of upper drum, if being connected between upper drum and steam manifold by dry saturated steam fairlead, is steamed
The quantity of vapour fairlead is no less than three, and steam output pipe is provided with steam manifold.
Further, the foregoing low NO with steam manifoldXDouble drum gas fired-boilers, wherein, steam fairlead is in upper drum
Top middle position uniform intervals arrangement.
Further, the foregoing low NO with steam manifoldXDouble drum gas fired-boilers, wherein, the heat exchange shell above economizer
Condenser is additionally provided with vivo, and backflow flue is connected on the heat exchange housing between economizer and condenser.
Further, the foregoing low NO with steam manifoldXDouble drum gas fired-boilers, wherein, outside feedwater is saved to economizer
Coal device feeds water to upper drum.
Further, the foregoing low NO with steam manifoldXDouble drum gas fired-boilers, wherein, burner hearth and convection cell are adopted
Use film water cold wall structure.
Further, the foregoing low NO with steam manifoldXDouble drum gas fired-boilers, wherein, circulating fan can by constantly from
The 20%~25% of the exhaust gas volumn discharged in economizer is constantly delivered in blast pipe.
Further, the foregoing low NO with steam manifoldXDouble drum gas fired-boilers, wherein, the pipe end of blast pipe is provided with
Air blower, air blower constantly delivers to air drum in blast pipe.
It is an advantage of the invention that：First, can be by from the NO in the flue gas of smoke stack emissionXConcentration be reduced to 30 mg/m3, from
And meet increasingly harsh emission request.2nd, the setting of economizer so that the heat that fuel gas buring is produced is obtained more fully
Utilize, so as to greatly improve boiler efficiency.The 3rd, if saturated vapor is entered in plenum chamber by dry saturated steam fairlead, then by collecting
Vapour case is outwards exported, and this causes the moisture content of saturated vapor to substantially reduce, the uniformity of saturated vapor is greatly improved, so that
The quality of the saturated vapor of boiler output is greatly enhanced.
Brief description of the drawings
Fig. 1 is the low NO of the present invention with steam manifoldXThe operation principle structural representation of double drum gas fired-boilers.
Fig. 2 is the low NO of the present invention with steam manifoldXThe structural representation of double drum gas fired-boilers.
Fig. 3 is the structural representation in Fig. 2 left views direction.
Embodiment
The present invention is described in further detail with preferred embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1 and Figure 2, the low NO with steam manifoldXDouble drum gas fired-boilers, including：Burner hearth 1, convection cell 2, upper drum
3 and lower drum 4, convection bank is provided between upper drum 3 and lower drum 4, burner hearth 1 is connected with convection cell 2, upper drum 3
The top and bottom of convection cell 2 are separately positioned on lower drum 4, the convection bank between upper drum 3 and lower drum 4 is located at convection current
In room 2.In the present embodiment, burner hearth 1 and convection cell 2 use film water cold wall structure, film water cold wall structure good airproof performance,
Heat-energy losses can be effectively reduced, so as to greatly improve boiler efficiency.Burner 5, burner are provided with the lighting-up tuyere 11 of burner hearth 1
5 are connected with conveying the blast pipe 51 of air and the Gas Pipe 52 of delivery of fuel gas respectively.The pipe end of blast pipe 51 is provided with air blast
Machine 14, air blower 14 constantly delivers to air drum in blast pipe 51.
In the present embodiment, convection cell 2 is communicated with heat exchange housing 7.Economizer is disposed with from the bottom to top in heat exchange housing 7
8 and condenser 9, the top of heat exchange housing 7, which is provided with, to be completed the flue gas of heat exchange and enters to heat exchange in chimney 10, convection cell 2
In housing 7.Outside feedwater is to economizer 8, and economizer 8 feeds water to upper drum 3.On the heat exchange housing 7 of the exhaust end of economizer 8,
Backflow flue 12 is communicated with heat exchange housing 7 i.e. between economizer 8 and condenser 9, backflow flue 12 passes through circulating fan
13 are connected with blast pipe 51, and the flue gas discharged from economizer 8 can be delivered in blast pipe 51 by circulating fan 13.This implementation
It is the exhaust gas volumn constantly discharged from economizer 8 constantly to enter to the exhaust gas volumn in blast pipe 51 by backflow flue 12 in example
20%~25%.
In the present embodiment, the top of upper drum 3 is fixedly installed steam manifold 6, if between upper drum 3 and steam manifold 6 by
Dry saturated steam fairlead 31 is connected, and the quantity of steam fairlead 31, which is no less than on three, steam manifold 6, is provided with steam output pipe
61.The quantity of steam fairlead 31 can specifically be determined according to the length of upper drum 3.In order to be able to which more stable output saturation is steamed
Vapour, top middle position uniform intervals arrangement of the steam fairlead 31 in upper drum 3.As shown in figure 3, in the present embodiment, steam
Fairlead 31 is four.If the effect for setting steam manifold 6 and dry saturated steam fairlead 31 is：This can ensure that shape in upper drum 3
Into saturated vapor can equably be discharged into steam manifold 6, then 6 from steam manifold in discharging equably and without water,
This greatly reduces the moisture content of the saturated vapor of boiler output, and substantially increases the uniform of the saturated vapor that boiler is exported
Property, so as to substantially increase the quality of the saturated vapor of boiler output.
Low NOXThe flue gas flow of double drum gas fired-boilers is as follows：Air is constantly delivered in blast pipe 51 by the drum of air blower 14,
Air in blast pipe 51 is constantly entered in burner 5, and cracked ends Gas Pipe 52 is not entered in burner 5 for combustion gas.Air with
The high-temperature flue gas that the mixed gas of combustion gas is produced after being lighted through burner 5 is entered in convection cell 2, is entered in convection cell 2
High-temperature flue gas is exchanged heat with convection bank, and the flue gas completed with convection bank after heat exchange is entered in heat exchange housing 7, is entered to
Flue gas first carries out heat exchange with economizer 8 in heat exchange housing 7, and the flue gas for completing heat exchange with economizer 8 is arranged from economizer 8
Go out.In the presence of circulating fan 13, the 20%~25% of the exhaust gas volumn constantly discharged from economizer 8 is continuous from backflow flue 12
Enter in blast pipe 51, remaining flue gas constantly discharged from economizer 8 is continued up carries out hot friendship with condenser 9
Change, the flue gas for completing heat exchange with condenser 9 is discharged from chimney 10.20%~25% flue gas that economizer 8 is discharged is defeated
Deliver in blast pipe 51, such purpose is：Dilute the concentration of oxygen in air in blast pipe 51 so that with combustion gas mixing
Oxygen concentration reduction in air, oxynitrides during so as to effectively reduction fuel gas buring（NOX）Growing amount, using this
NO in the flue gas that mode will can be discharged finally from chimney 10XConcentration be reduced to 30 mg/m3.In addition, will be constantly by returning
The exhaust gas volumn that flow flue 12 is entered in blast pipe 51 is controlled the 20%~25% of the exhaust gas volumn constantly discharged from economizer 8,
Such purpose is：It can guarantee that combustion gas is fully burnt.
Low NOXThe carbonated drink flow of double drum gas fired-boilers is as follows：Water in lower drum 4 is constantly entered in convection bank,
The steam water interface that water in convection bank is formed after being heated constantly is moved into upper drum 3 upwards.Meanwhile, outside feedwater
Into economizer 8, economizer 8 is by hot water supply into upper drum 3.The saturated vapor separated in upper drum 3 passes through steam
Fairlead 31 is entered in steam manifold 6, and the saturated vapor in steam manifold 6 is outwards exported from steam output pipe 61 again.Economizer 8
Set so that the heat of high-temperature flue gas that fuel gas buring is produced more fully is utilized, namely improve boiler effect significantly
Rate.Hot water in condenser 9 directs out output and used.
The advantage of the invention is that：First, can be by from the NO in the flue gas that chimney 10 is dischargedXConcentration be reduced to 30 mg/m3
, so as to meet increasingly harsh emission request.2nd, the setting of economizer 8 and condenser 9 so that the heat that fuel gas buring is produced
More fully utilized, so as to greatly improve boiler efficiency.3rd, the saturated vapor formed in upper drum 3 is equably discharged into
Into steam manifold 6, then from steam manifold 6 in equably discharge, this saturated vapor for greatly reducing boiler output contains
Water rate, and the uniformity of the saturated vapor of boiler output is substantially increased, so as to substantially increase the saturated vapor of boiler output
Quality.
Claims (7)
1. the low NO with steam manifoldXDouble drum gas fired-boilers, including：Set between burner hearth, convection cell, upper and lower drum, upper and lower drum
Convection bank is equipped with, burner hearth is connected with convection cell, upper and lower drum is separately positioned on the top and bottom of convection cell, upper and lower pot
Convection bank between cylinder is located in convection cell, is provided with burner in the lighting-up tuyere of burner hearth, burner respectively with blast pipe and
Gas Pipe is connected, it is characterised in that：Convection cell is communicated with heat exchange housing, heat exchange housing and is provided with economizer, and exchange heat housing
Top be provided with completed in chimney, convection cell heat exchange flue gas enter to heat exchange housing in and with economizer carry out heat
Exchange, backflow flue is communicated with the heat exchange housing of economizer exhaust end, backflow flue is connected by circulating fan with blast pipe
Logical, the flue gas discharged from economizer can be delivered in blast pipe by circulating fan；Collection vapour is fixedly installed at the top of upper drum
Case, if being connected between upper drum and steam manifold by dry saturated steam fairlead, the quantity of steam fairlead is no less than three, collects vapour
Steam output pipe is provided with case.
2. the low NO according to claim 1 with steam manifoldXDouble drum gas fired-boilers, it is characterised in that：Steam fairlead exists
The top middle position uniform intervals arrangement of upper drum.
3. the low NO according to claim 1 or 2 with steam manifoldXDouble drum gas-fired boilers, it is characterised in that：Above economizer
Heat exchange housing in be additionally provided with condenser, backflow flue is connected on the heat exchange housing between economizer and condenser.
4. the low NO according to claim 1 or 2 with steam manifoldXDouble drum gas fired-boilers, it is characterised in that：Outside feedwater
To economizer, economizer feeds water to upper drum.
5. the low NO according to claim 1 or 2 with steam manifoldXDouble drum gas fired-boilers, it is characterised in that：Burner hearth and
Convection cell uses film water cold wall structure.
6. the low NO according to claim 1 or 2 with steam manifoldXDouble drum gas fired-boilers, it is characterised in that：Circulating fan
The 20%~25% of the exhaust gas volumn constantly discharged from economizer can be constantly delivered in blast pipe.
7. the low NO according to claim 1 or 2 with steam manifoldXDouble drum gas fired-boilers, it is characterised in that：Blast pipe
Pipe end is provided with air blower, and air blower constantly delivers to air drum in blast pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710311339.7A CN106958808A (en) | 2017-05-05 | 2017-05-05 | Low NO with steam manifoldXDouble drum gas fired-boilers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710311339.7A CN106958808A (en) | 2017-05-05 | 2017-05-05 | Low NO with steam manifoldXDouble drum gas fired-boilers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106958808A true CN106958808A (en) | 2017-07-18 |
Family
ID=59483069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710311339.7A Pending CN106958808A (en) | 2017-05-05 | 2017-05-05 | Low NO with steam manifoldXDouble drum gas fired-boilers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106958808A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH234750A (en) * | 1943-06-26 | 1944-10-31 | Sulzer Ag | Firing, in particular for steam boilers. |
| US20110000445A1 (en) * | 2007-11-10 | 2011-01-06 | English John R | Package boiler having steam generating units in tandem |
| CN202141028U (en) * | 2011-07-21 | 2012-02-08 | 天津宝成机械制造股份有限公司 | Steam type integral fast-assembled fuel-gas boiler |
| CN104976615A (en) * | 2015-07-09 | 2015-10-14 | 福建永恒能源管理有限公司 | Backflow smoke recycling coal dust industrial boiler combustion system |
| CN206846678U (en) * | 2017-05-05 | 2018-01-05 | 张家港格林沙洲锅炉有限公司 | The double drum gas fired-boilers of low NOX with steam manifold |
-
2017
- 2017-05-05 CN CN201710311339.7A patent/CN106958808A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH234750A (en) * | 1943-06-26 | 1944-10-31 | Sulzer Ag | Firing, in particular for steam boilers. |
| US20110000445A1 (en) * | 2007-11-10 | 2011-01-06 | English John R | Package boiler having steam generating units in tandem |
| CN202141028U (en) * | 2011-07-21 | 2012-02-08 | 天津宝成机械制造股份有限公司 | Steam type integral fast-assembled fuel-gas boiler |
| CN104976615A (en) * | 2015-07-09 | 2015-10-14 | 福建永恒能源管理有限公司 | Backflow smoke recycling coal dust industrial boiler combustion system |
| CN206846678U (en) * | 2017-05-05 | 2018-01-05 | 张家港格林沙洲锅炉有限公司 | The double drum gas fired-boilers of low NOX with steam manifold |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170718 |
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