CN208983330U - Double fuel boiler system - Google Patents
Double fuel boiler system Download PDFInfo
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- CN208983330U CN208983330U CN201821602602.4U CN201821602602U CN208983330U CN 208983330 U CN208983330 U CN 208983330U CN 201821602602 U CN201821602602 U CN 201821602602U CN 208983330 U CN208983330 U CN 208983330U
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Abstract
The utility model relates to a kind of double fuel boiler systems, including the circulating fluidized bed boiler assembly being made of combustion chamber, separator and returning charge valve, it the combustion chamber can be individually using water-coal-slurry or natural gas as fuel, the water-coal-slurry that the combustion chamber offers for conveying water-coal-slurry into itself inner cavity sows interface, and the natural gas combustion nozzle for the natural gas that burns is provided in the combustion chamber.The double fuel boiler system, based on circulating fluidized bed boiler, water-coal-slurry has been opened up on combustion chamber sows interface, and it is provided with natural gas combustion nozzle in the combustion chamber, the boiler system is switched between two kinds of fuel of water-coal-slurry and natural gas, not only meet emission request, but also people's livelihood needs can be looked after, while production cost can also be reduced as far as possible.
Description
Technical field
The utility model relates to boiler for producing design field, in particular to a kind of double fuel boiler.
Background technique
Currently, domestic industry boiler counts 80% or so still as coal-burning boiler by measure, wherein quite a few boiler compound
Dirt, SO2It being severely exceeded with discharged nitrous oxides, technology more advanced at present is circulating fluidized bed boiler in coal-burning boiler, but
With the raising of national boiler emission standard, the limitation of coal fuel is used, and fire coal circulating fluid bed boiler is no longer satisfied
Emission request.
Water-coal-slurry is all as a kind of coal derived fuel, from transport, the whole process stored, be transported to fuel interface before boiler
Closed progress, if coal water slurry fuel cooperation fluidised form equiulbrium flow fluidized bed boiler uses, can reach after furnace without desulfurization removing nitric
National minimum discharge standard；However, not being widely recognized as also at present since water-coal-slurry is coal derived fuel, in some area applications
When be likely to encounter obstacle, but undeniable is that coal water slurry fuel is used cooperatively with fluidised form equiulbrium flow fluidized bed boiler, really can be with
Achieve the effect that cleaning discharge.
Harmful substances, the pollutant generated after burning such as hardly nitrogenous sulphur, dust contain for its opposite coal of natural gas, because
It measures low, is widely regarded as a kind of clean energy resource, however since China's natural gas reserves are less, price is high, insufficiency of supply-demand
It is very big, it is concentrated use in natural gas and is very easy to cause natural gas short supply state.
Utility model content
The purpose of the utility model is to disclose a kind of double fuel boiler system, the double fuel boiler system can individually with
Water-coal-slurry or natural gas are fuel, easy can be switched between two kinds of fuel, in the efficiency of combustion and cigarette of water-coal-slurry
Gas discharge clean-up performance it is up to standard when, fuel can be used as using water-coal-slurry, natural gas combustion nozzle is produced into as spare with reduction
This；Coal derived fuel limited or discharged cleaning require it is higher when, natural gas can be used as fuel, water-coal-slurry sows interface
As spare；And in natural gas supply deficiency, it can be switched to coal water slurry fuel, meet minimum discharge while guaranteeing the people's livelihood
Standard requirements.
In order to achieve the above objectives, double fuel boiler system provided by the utility model, including by combustion chamber, separator and return
The circulating fluidized bed boiler assembly that material valve is constituted, the combustion chamber can be described individually using water-coal-slurry or natural gas as fuel
The water-coal-slurry that combustion chamber offers for conveying water-coal-slurry into itself inner cavity sows interface, and is arranged in the combustion chamber useful
In the natural gas combustion nozzle of burning natural gas.
Preferably, it is additionally provided with sealing valve to be opened/closed between the separator and the returning charge valve, in the combustion chamber
When using water-coal-slurry as fuel, the sealing valve is opened, and is connected between the separator and the returning charge valve；The combustion chamber with
When natural gas is fuel, the sealing valve is closed, and the separator is separated with the returning charge valve.
Preferably, the sealing valve is pneumostop valve.
Preferably, the water-coal-slurry sow interface have it is multiple, and the water-coal-slurry sow interface be arranged in the burning
The top of room.
Preferably, the combustion chamber is arranged altogether sows interface there are four the water-coal-slurry, and four water-coal-slurry are sowed
Longitudinal center plane bilateral symmetry of the interface about the combustion chamber.
Preferably, under the natural gas combustion nozzle has multiple, and the natural gas combustion nozzle is arranged in the combustion chamber
Portion.
Preferably, the natural gas combustion nozzle includes two altogether, and two natural gas combustion nozzles are about the combustion chamber
Longitudinal center plane bilateral symmetry.
Preferably, the solid particle catch rate of the separator is not less than 95%.
Preferably, further include the flue to connect with the separator, be provided with economizer in the flue.
It preferably, further include the air preheater for being arranged in the flue, and being located at the economizer downstream.
Double fuel boiler system disclosed in the utility model, combustion chamber can individually be with water-coal-slurry or natural gas
Raw material, the water-coal-slurry that combustion chamber offers for conveying water-coal-slurry into combustion chamber inner cavity are sowed interface, are provided in combustion chamber
Natural gas combustion nozzle for the natural gas that burns.Two kinds of fuel of water-coal-slurry and natural gas can switch over, in the burning of water-coal-slurry
When efficiency and flue gas emission clean-up performance up to standard, can using water-coal-slurry as fuel, natural gas combustion nozzle as spare, with
Reduce production cost；Coal derived fuel limited or discharged cleaning require it is higher when, natural gas can be used as fuel, water coal
Slurry sows interface as spare；And in natural gas supply deficiency, it can be switched to coal water slurry fuel, expire while guaranteeing the people's livelihood
Sufficient minimum discharge standard requirements.
The double fuel boiler system is based on circulating fluidized bed boiler, water-coal-slurry has been opened up on combustion chamber and has sowed interface, and
It is provided with natural gas combustion nozzle in the combustion chamber, which is carried out between two kinds of fuel of water-coal-slurry and natural gas
Switching, not only meets emission request, but also can look after people's livelihood needs, while can also reduce production cost as far as possible.
Detailed description of the invention
Fig. 1 is the vertical section schematic diagram of double fuel boiler system disclosed in an embodiment of the present invention.
Wherein, 1 is combustion chamber, and 2 be natural gas combustion nozzle, and 3 sow interface for water-coal-slurry, and 4 be burner hearth, and 5 be flue, and 6 be province
Coal device, 7 be separator, and 8 be sealing valve, and 9 be returning charge valve, and 10 be air preheater.
Specific embodiment
The core of the utility model is to provide a kind of double fuel boiler system, the double fuel boiler system can individually with
Water-coal-slurry or natural gas are fuel, easy can be switched between two kinds of fuel, in the efficiency of combustion and cigarette of water-coal-slurry
Gas discharge clean-up performance it is up to standard when, fuel can be used as using water-coal-slurry, natural gas combustion nozzle is produced into as spare with reduction
This；Coal derived fuel limited or discharged cleaning require it is higher when, natural gas can be used as fuel, water-coal-slurry sows interface
As spare；And in natural gas supply deficiency, it can be switched to coal water slurry fuel, meet minimum discharge while guaranteeing the people's livelihood
Standard requirements.
In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and specific implementation
The utility model is described in further detail for mode.
As shown in fig. 1, the double fuel boiler system disclosed in the present embodiment is on the basis of circulating fluidized bed boiler
Upper formation, wherein combustion chamber 1, separator 7 and returning charge valve 9 constitute circulating fluidized bed boiler assembly, and circulating fluidized bed boiler exists
In actual moving process, it is flat that fluidisation fuel and flue gas between combustion chamber 1, separator 7 and returning charge valve 9 form a kind of dynamic
Weighing apparatus, therefore the circulating fluidized bed boiler in the present embodiment is alternatively referred to as fluidised form balanced recycle fluidized bed combustion boiler, is said
Bright, this kind of dynamic equilibrium can be equilibrium state employed in existing circulating fluidized bed boiler, or newly-established
Equilibrium state.In the double fuel boiler system, combustion chamber 1 can be individually using water-coal-slurry or natural gas as fuel, and combustion chamber 1 opens up
There is the water-coal-slurry for conveying water-coal-slurry into 1 inner cavity of combustion chamber to sow interface 3, and is additionally provided in combustion chamber 1 for firing
Burn the natural gas combustion nozzle 2 of natural gas.
Water-coal-slurry be 65% or so by weight proportion coal, weight proportion be 34% or so water and 1% or so add
Add a kind of agent low pollution as obtained from Physical Processing, can pipeline Coal-based Liquid Fuel, it is directly right compared at present
For the mode that coal solid particle burns, it can to burn using water-coal-slurry as boiler oil more uniform, and by
Moisture content in water-coal-slurry is larger, and the temperature of 4 flame kernel of burner hearth is lower, and the reduction of flame kernel temperature can effectively reduce
The generation of nitrogen oxides；Further, solid gas separation is also carried out by separator 7 before high-temperature flue gas enters flue 5, point
It is sent back to circulating combustion in combustion chamber from obtained solid particulate matter, this increases fuel recycle multiplying power, 4 temperature of burner hearth
Degree reduces, and fuel economy improves, so that the volumetric concentration of fixed carbon increases in fuel, this can make to have generated
Nitric oxide and carbon react and generate nitrogen and carbon monoxide, to make nitrogen oxidation generated in combustion chamber 1 and burner hearth 4
Object further decreases, and therefore, circulating fluidized bed boiler cooperation coal water slurry fuel burns, it is not necessary that desulfurization removing nitric is arranged after furnace
Equipment can reach national minimum discharge requirement.
And natural gas is for coal, the harmful substances such as hardly nitrogenous sulphur, dust, therefore the pollutant after burning
Content is very low, is acknowledged as a kind of clean energy resource.
Double fuel boiler system disclosed in above-described embodiment, combustion chamber 1 can be individually with water-coal-slurry or natural gases
For raw material, the water-coal-slurry that combustion chamber 1 offers for conveying water-coal-slurry into combustion chamber inner cavity is sowed interface, is set in combustion chamber 1
It is equipped with the natural gas combustion nozzle 2 for the natural gas that burns.Two kinds of fuel of water-coal-slurry and natural gas can switch over, in water-coal-slurry
, can be using water-coal-slurry as fuel when efficiency of combustion and flue gas emission clean-up performance up to standard, natural gas combustion nozzle 2 is as standby
With to reduce production cost；Coal derived fuel limited or discharged cleaning require it is higher when, can be used natural gas as combustion
Material, water-coal-slurry sow interface as spare；And in natural gas supply deficiency, it can be switched to coal water slurry fuel, guaranteeing the people's livelihood
While meet minimum discharge standard requirements.
The double fuel boiler system is based on circulating fluidized bed boiler, water-coal-slurry has been opened up on combustion chamber 1 and has sowed interface 3,
And natural gas combustion nozzle 2 is provided in combustion chamber 1, allow the boiler system between two kinds of fuel of water-coal-slurry and natural gas
It switches over, not only meets emission request, but also people's livelihood needs can be looked after, while production cost can also be reduced as far as possible.
In order to advanced optimize the technical solution in above-described embodiment, in the present embodiment also separator 7 and returning charge valve 9 it
Between be provided with sealing valve 8 to be opened/closed, when combustion chamber 1 is using water-coal-slurry as fuel, sealing valve 8 is opened, separator 7 and returning charge valve
It is connected between 9；When combustion chamber 1 is using natural gas as fuel, sealing valve 8 is closed, and separator 7 is separated with returning charge valve 9.
Since water-coal-slurry is coal derived fuel, complete to press from both sides in generated high-temperature flue gas after burning in combustion chamber 1
Miscellaneous solid particulate matter, there are some imperfect combustion burnable granules in these solid particulate matters, therefore are caught by separator 7
Solid particulate matter is caught, then returns to solid particulate matter to burning in combustion chamber 1, to improve combustion by returning charge valve
Efficiency is burnt, while reducing the production quantity of nitrogen oxides in combustion chamber 1；And when using natural gas as fuel, since its burning produces
Object is substantially free of the solid particulate matters such as dust, repeats burning without carrying out, therefore sealing valve 8 is closed, makes combustion of natural gas
Generated flue gas smooth discharge afterwards, while sealing valve structure for the sealing system at returning charge valve 9 is simple, operation
Simplicity, the less energy intensive closed and opened, therefore be arranged after sealing valve 8 without running the sealing system at returning charge valve 9, thus
Achieve the purpose that reduce equipment operating cost and extends service life of equipment.
It needs to be illustrated, which can may be to carry out certainly by control system for manual sealing valve
The sealing valve of dynamic control, in order to reduce the labor intensity of staff, the sealing valve 8 in the present embodiment is preferably by automatic
The pneumostop valve that control system is controlled.
As shown in fig. 1, water-coal-slurry sow interface 3 generally include it is multiple, such as two, three or four, actual design and
Using when can carry out adaptability matching as needed, water-coal-slurry is preferably sowed into interface 3, the upper of combustion chamber 1 is set
Portion, in favor of full combustion of the water-coal-slurry in combustion chamber 1, more specifically, setting is sowed there are four water-coal-slurry altogether for combustion chamber 1
Interface 3, and four water-coal-slurry sow longitudinal center plane bilateral symmetry of the interface 3 about combustion chamber 1.
It needs to be illustrated, the one side opposite with returning charge valve 9 of combustion chamber 1 is the back side of combustion chamber 1, opposite with the back side
Side be before combustion chamber 1, when people stands before the combustion chamber 1, left-hand side is defined as the left side of combustion chamber 1,
Right-hand side is defined as the right side of combustion chamber 1, and longitudinal center plane specifically refers to vertical with the left and right sides, and crosses left and right side line
Midpoint vertical plane.
Sowing interface 3 due to water-coal-slurry includes four, and the left and right sides is each provided with two, two water of any side
Coal slurry is sowed interface 3 and is also symmetrical arranged in the vertical direction.
Natural gas combustion nozzle 2 is generally also including multiple, under preferably natural gas combustion nozzle 2 is arranged in combustion chamber 1
Portion, so-called middle and lower part specifically refer to middle part or lower part, and as shown in fig. 1, the above are burner hearths 4 at combustion chamber 1 top, with combustion chamber 1
Center in short transverse is boundary, 1 center of combustion chamber the above are the top of combustion chamber, center the following are the lower part of combustion chamber 1,
Position close to 1 center of combustion chamber is the middle part of combustion chamber 1.
Further, natural gas combustion nozzle 2 includes two altogether, longitudinal center of two natural gas combustion nozzles 2 about combustion chamber 1
Face is symmetrical set.
In order to improve efficiency of combustion, generated nitrogen oxides in combustion chamber 1, the separation in the present embodiment are further decreased
Device 7 preferably uses efficient cyclone, and the solid particulate matter catch rate of the efficient cyclone is not less than 95%.
Referring to FIG. 1, the downstream connection of separator 7 has flue 5, in order to further save fuel, province is provided in flue 5
Coal device 6, while in order to be preheated to the air entered in combustion chamber 1, it is also set up in flue 5 in the downstream of economizer 6 free
Air preheater 10, to make full use of the waste heat of flue gas.
Double fuel boiler system provided by the utility model is described in detail above.It is used herein specifically
A example is expounded the principles of the present invention and embodiment, and the above embodiments are only used to help understand originally
The method and its core concept of utility model.It should be pointed out that for those skilled in the art, not departing from
Under the premise of the utility model principle, several improvements and modifications can be made to this utility model, these improvement and modification
It falls into the protection scope of the utility model claims.
Claims (10)
1. a kind of double fuel boiler system, ciculation fluidized including being made of combustion chamber (1), separator (7) and returning charge valve (9)
Bed boiler assembly, which is characterized in that the combustion chamber (1) can be individually using water-coal-slurry or natural gas as fuel, the combustion chamber
(1) it offers the water-coal-slurry for conveying water-coal-slurry into itself inner cavity to sow interface (3), and setting in the combustion chamber (1)
There is the natural gas combustion nozzle (2) for the natural gas that burns.
2. double fuel boiler system according to claim 1, which is characterized in that the separator (7) and the returning charge valve
(9) sealing valve to be opened/closed (8) are additionally provided between, when the combustion chamber (1) is using water-coal-slurry as fuel, the sealing valve
(8) it opens, is connected between the separator (7) and the returning charge valve (9)；When the combustion chamber (1) is using natural gas as fuel,
The sealing valve (8) is closed, and the separator (7) is separated with the returning charge valve (9).
3. double fuel boiler system according to claim 2, which is characterized in that the sealing valve (8) is pneumostop valve.
4. double fuel boiler system according to claim 1, which is characterized in that the water-coal-slurry, which sows interface (3), to be had
It is multiple, and the water-coal-slurry sows interface (3) setting on the top of the combustion chamber (1).
5. double fuel boiler system according to claim 4, which is characterized in that the combustion chamber (1) is altogether there are four settings
The water-coal-slurry is sowed interface (3), and four water-coal-slurry sow longitudinal center of the interface (3) about the combustion chamber (1)
Face bilateral symmetry.
6. double fuel boiler system according to claim 1, which is characterized in that the natural gas combustion nozzle (2) have it is multiple,
And natural gas combustion nozzle (2) setting is in the middle and lower part of the combustion chamber (1).
7. double fuel boiler system according to claim 6, which is characterized in that the natural gas combustion nozzle (2) includes two altogether
It is a, and longitudinal center plane bilateral symmetry of two natural gas combustion nozzles (2) about the combustion chamber (1).
8. double fuel boiler system described in -7 any one according to claim 1, which is characterized in that the separator (7)
Solid particle catch rate is not less than 95%.
9. double fuel boiler system according to claim 1, which is characterized in that further include connecting with the separator (7)
Flue (5), is provided with economizer (6) in the flue (5).
10. double fuel boiler system according to claim 9, which is characterized in that further include being arranged in the flue (5)
It is interior, and it is located at the air preheater (10) in the economizer (6) downstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602602.4U CN208983330U (en) | 2018-09-29 | 2018-09-29 | Double fuel boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602602.4U CN208983330U (en) | 2018-09-29 | 2018-09-29 | Double fuel boiler system |
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| Publication Number | Publication Date |
|---|---|
| CN208983330U true CN208983330U (en) | 2019-06-14 |
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| CN201821602602.4U Active CN208983330U (en) | 2018-09-29 | 2018-09-29 | Double fuel boiler system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058978A (en) * | 2018-09-29 | 2018-12-21 | 青岛特利尔环保股份有限公司 | Double fuel boiler system |
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2018
- 2018-09-29 CN CN201821602602.4U patent/CN208983330U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058978A (en) * | 2018-09-29 | 2018-12-21 | 青岛特利尔环保股份有限公司 | Double fuel boiler system |
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Effective date of registration: 20220524 Granted publication date: 20190614 |