CN206846678U - The double drum gas fired-boilers of low NOX with steam manifold - Google Patents
The double drum gas fired-boilers of low NOX with steam manifold Download PDFInfo
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- CN206846678U CN206846678U CN201720492052.4U CN201720492052U CN206846678U CN 206846678 U CN206846678 U CN 206846678U CN 201720492052 U CN201720492052 U CN 201720492052U CN 206846678 U CN206846678 U CN 206846678U
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Abstract
The utility model 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, and economizer is provided with the housing that exchanges heat, 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.The utility model has the advantages 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
It the utility model is related to double drum gas fired-boilers.
Background technology
Traditional double drum gas fired-boilers, its structure include：Burner hearth, convection cell, upper and lower drum, set between upper and lower drum
Convection bank is equipped with, burner hearth is connected with convection cell, and upper and lower drum is separately positioned on the top and bottom of convection cell, upper drum
On be provided with steam output pipe, be also associated with chimney at the top of convection cell, 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, high-temperature flue gas caused by burning enters in convection cell and carries out heat exchange with convection bank, complete the gas of heat exchange from
Discharged in chimney, the water in convection bank is entered in upper drum by the steam water interface of thermosetting, is formed in upper drum
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 defects of traditional double drum gas fired-boilers, is：First, from the NO in the flue gas of chimney dischargeXContent 100
~150mg/m3It is also significantly exceeded for the area of the high discharge standard such as Beijing although meeting discharging standards.
2nd, the utilization rate of heat energy caused by fuel gas buring 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 the saturated vapor flow velocity in the upper drum near from steam output pipe is big, easy with 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 bad.
Utility model content
The purpose of this utility model is：NO can effectively be reduced by providing one kindXDischarge capacity simultaneously can greatly improve saturated vapor product
Double drum gas fired-boilers of matter.
To achieve the above object, the technical solution adopted in the utility model is：Low NO with steam manifoldXDouble drum gas-fired boilers
Stove, including：Burner hearth, convection cell, upper and lower drum, convection bank is provided between upper and lower drum, burner hearth is connected with convection cell,
Upper and lower drum is separately positioned on the top and bottom of convection cell, and the convection bank between upper and lower drum is located in convection cell, stove
Burner is provided with the lighting-up tuyere of thorax, burner is connected with blast pipe and Gas Pipe respectively, and convection cell is communicated with heat exchange shell
Body, exchange heat housing in be provided with economizer, chimney is provided with the top of the housing that exchanges heat, the flue gas of heat exchange is completed in convection cell
Enter in heat exchange housing and carry out heat exchange with economizer, 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 to air intake by circulating fan
Guan Zhong；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,
The quantity of steam 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 to economizer, save
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 will 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 deliver to air drum in blast pipe.
The utility model has the advantages that：First, can be by from the NO in the flue gas of smoke stack emissionXConcentration be reduced to 30 mg/m3
, so as to meet increasingly harsh emission request.2nd, the setting of economizer so that heat is more filled caused by fuel gas buring
The utilization divided, so as to greatly improve boiler efficiency.The 3rd, if saturated vapor is entered in plenum chamber by dry saturated steam fairlead, then
Outwards being exported by steam manifold, this causes the moisture content of saturated vapor to substantially reduce, the uniformity of saturated vapor greatly improves, so as to
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 described in the utility model with steam manifoldXThe operation principle structural representation of double drum gas fired-boilers
Figure.
Fig. 2 is the low NO described in the utility model 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 utility model 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 deliver 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 is provided with chimney 10, and the flue gas that heat exchange is completed in convection cell 2 enters to heat exchange
In housing 7.To economizer 8, economizer 8 feeds water to upper drum 3 for outside feedwater.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
The exhaust gas volumn constantly entered in example by backflow flue 12 in blast pipe 51 is the exhaust gas volumn constantly discharged from economizer 8
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 is no less than three, and steam output pipe is provided with steam manifold 6
61.The quantity of steam fairlead 31 can specifically determine according to the length of upper drum 3.In order 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 of steam manifold 6 and dry saturated steam fairlead 31 is set to be：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 of boiler output
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 combustion gas is constantly entered in burner 5 through Gas Pipe 52.Air with
The mixed gas of combustion gas caused high-temperature flue gas after burner 5 is lighted 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 that heat exchange is completed with economizer 8 is arranged from economizer 8
Go out.In the presence of circulating fan 13, constantly discharged from economizer 8 the 20%~25% of exhaust gas volumn constantly from backflow flue 12
Enter in blast pipe 51, remaining flue gas constantly discharged from economizer 8 continues up carries out hot friendship with condenser 9
Change, the flue gas that heat exchange is completed with condenser 9 discharges 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 in air reduces, oxynitrides during so as to effectively reduce fuel gas buring（NOX）Growing amount, use is 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 control of exhaust gas volumn that flow flue 12 is entered in blast pipe 51 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 outwards exports from steam output pipe 61 again.Economizer 8
Set so that the heat of high-temperature flue gas caused by fuel gas buring more fully utilized, namely improves boiler effect significantly
Rate.Hot water in condenser 9 directs out output and used.
The utility model has the advantage of：First, the NO in the flue gas that will can be discharged from chimney 10XConcentration 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 fuel gas buring produces
Heat more fully utilized, so as to greatly improve boiler efficiency.3rd, the saturated vapor formed in upper drum 3 is uniform
Ground is discharged into steam manifold 6, then 6 from steam manifold in equably discharge, this greatly reduce boiler output saturation steam
The moisture content of vapour, and the uniformity of the saturated vapor of boiler output is substantially increased, so as to substantially increase the full of boiler output
With the quality of steam.
Claims (7)
1. the low NO with steam manifoldXDouble drum gas fired-boilers, including：Burner hearth, convection cell, upper and lower drum, set between upper and lower drum
Convection bank is equipped with, burner hearth is connected with convection cell, and 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, and economizer is provided with the housing that exchanges heat, and exchange heat housing
Top be provided with chimney, completed in 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：On economizer
Condenser is additionally provided with the heat exchange housing of side, 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 |
|---|---|---|---|
| CN201720492052.4U CN206846678U (en) | 2017-05-05 | 2017-05-05 | The double drum gas fired-boilers of low NOX with steam manifold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720492052.4U CN206846678U (en) | 2017-05-05 | 2017-05-05 | The double drum gas fired-boilers of low NOX with steam manifold |
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| CN206846678U true CN206846678U (en) | 2018-01-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958808A (en) * | 2017-05-05 | 2017-07-18 | 张家港格林沙洲锅炉有限公司 | Low NO with steam manifoldXDouble drum gas fired-boilers |
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2017
- 2017-05-05 CN CN201720492052.4U patent/CN206846678U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958808A (en) * | 2017-05-05 | 2017-07-18 | 张家港格林沙洲锅炉有限公司 | Low NO with steam manifoldXDouble drum gas fired-boilers |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 215600 No. 3 Nanyuan Road, Zhangjiagang Economic Development Zone, Suzhou City, Jiangsu Province Patentee after: Zhangjiagang Hailu Shazhou Technology Co., Ltd. Address before: South South Road Suzhou 215600 Jiangsu province Zhangjiagang Economic Development Zone No. 3 Zhangjiagang Green Shazhou Boiler Co. Ltd. Patentee before: Zhangjiagang Greens Shazhou Boiler Co., Ltd. |
|
| CP03 | Change of name, title or address |