CN208186404U - Pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system - Google Patents
Pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system Download PDFInfo
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- CN208186404U CN208186404U CN201820515408.6U CN201820515408U CN208186404U CN 208186404 U CN208186404 U CN 208186404U CN 201820515408 U CN201820515408 U CN 201820515408U CN 208186404 U CN208186404 U CN 208186404U
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- supply system
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Abstract
The utility model discloses a kind of pulverized-coal fired boiler powder-supply systems from inerting and to stablize powder-supply system, including combustion control system, air accumulator, coal dust tower, measuring chute, boiler exhaust gas feeding pipe, the first gas supply under constant pressure pipeline and the second gas supply under constant pressure pipeline；Boiler exhaust gas feeding pipe is used to supply boiler exhaust gas to air accumulator, first gas supply under constant pressure piping connection air accumulator and measuring chute, second gas supply under constant pressure piping connection air accumulator and coal dust tower, it is provided with measuring chute pressure in combustion control system and stablizes setting value, first pressure transmitter is provided on measuring chute, shut-off valve is provided on second gas supply under constant pressure pipeline, combustion control system controls the aperture of shut-off valve according to the comparison result of design value and measured value to realize the control stable to pressure in measuring chute.Boiler exhaust gas can be delivered to coal dust tower and realize the safety that ensure that coal dust is stored in coal dust tower from inerting by the utility model, and can realize pressure stability contorting to measuring chute, realized the stabilization of coal dust, continuously supplied.
Description
Technical field
The utility model belongs to coal powder boiler combustion stability contorting and coal dust tower inerting technical field more particularly to a kind of coal
Powder boiler powder-supply system is from inerting and stablizes powder-supply system.
Background technique
Current pulverized-coal fired boiler powder-supply system by coal dust tower and measuring chute, powder falling rotary valve, powder supply rotary valve, compressed air system,
Inert gas system, electric control system composition.
The effect of inert gas system is needed immediately when temperature, carbonomonoxide concentration rise to alarm limits in coal dust tower
Automatic enable fills lazy system, to reduce air oxygen content and carbon monoxide content in coal dust tower, until reach inert atmosphere, to prevent
The accidents such as fire, explosion only occur.But inert gas (mainly with carbon dioxide) needs to lay in advance to meet in emergency circumstances
Needs, therefore inert gas system used in current powder-supply system is huger, and operation is complicated with monitoring system, and early period throws
Enter and later period operating cost is high.It is limited based on storage level, therefore only can just be opened when encountering the exceeded alarm of temperature, carbon monoxide
With filling lazy system.
Coal dust tower discharge valve is in feeding process, and compressed air broken arch is also carrying out simultaneously, to prevent coal during falling stop material
Powder arch camber causes not powder falling or powder falling amount inadequate.And in actual moving process, compressed air broken arch and coal dust blanking operation
It will cause pressure in measuring chute and larger fluctuation occur, and then affect the stability and continuity of powder supply, or even influence coal
Powder burning, causes pressure in the burner hearth to fluctuate, is unfavorable for boiler continuous and steady operation.
Therefore be highly desirable to adopt an effective measure with ensure in coal dust tower steadily in the long term in inert atmosphere and gram
The problem of taking measuring chute pressure oscillation in operational process.
Utility model content
The utility model is in place of avoiding above-mentioned the shortcomings of the prior art, to provide a kind of pulverized-coal fired boiler powder-supply system
From inerting and stablize powder-supply system, to guarantee coal dust safe storage, stable operation of the boiler.
The technology employed by the present utility model is
A kind of pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system, including combustion control system, air accumulator, coal dust
Tower, measuring chute, boiler exhaust gas feeding pipe, the first gas supply under constant pressure pipeline and the second gas supply under constant pressure pipeline；The boiler exhaust gas
Feeding pipe be used for the air accumulator supply boiler exhaust gas, the boiler exhaust gas feeding pipe along boiler exhaust gas flow direction according to
Secondary to be provided with gas cooler and Roots blower, Roots blower is extracted through gas cooler boiler exhaust gas after cooling and right
Boiler exhaust gas is delivered to the air accumulator after being pressurizeed；The first gas supply under constant pressure pipeline is for connecting air accumulator and metering
Storehouse, the part boiler exhaust gas after air accumulator pressure stabilizing are transported to the measuring chute；The second gas supply under constant pressure pipeline is for connecting
Air accumulator and coal dust tower are connect, another part boiler exhaust gas after air accumulator pressure stabilizing is transported to the coal dust tower；The burning
It is stored with measuring chute pressure in control system and stablizes setting value, first for detecting air pressure in measuring chute is provided on measuring chute
Pressure transmitter, air pressure measured value real-time Transmission in the measuring chute that first pressure transmitter will test to the Combustion System
System, shut-off valve is provided on the first gas supply under constant pressure pipeline, and combustion control system is worth gentle compacting according to measuring chute Stability Design
The comparison result of measured value controls the aperture of the shut-off valve to realize the control stable to pressure in measuring chute.
The first steam-water separation is provided on boiler exhaust gas feeding pipe between the gas cooler and Roots blower
Gas cooler boiler exhaust gas after cooling is just transported to Roots's drum by device after the dehydration of the first steam-water separator first
Blower.
It is provided with the second steam-water separator on the first gas supply under constant pressure pipeline, the part boiler tail after air accumulator pressure stabilizing
Gas is just transported to the measuring chute after the dehydration of the second steam-water separator first.
It is additionally provided with deduster on the first gas supply under constant pressure pipeline, the part boiler exhaust gas after air accumulator pressure stabilizing is successively
The measuring chute is just transported to after the second steam-water separator, deduster.
The second pressure transmitter for detecting air pressure in air accumulator, second pressure transmitter are provided on the air accumulator
Atmospheric pressure value real-time Transmission in the air accumulator that will test is to the combustion control system.
The first temperature on the spot is provided on boiler exhaust gas feeding pipe between the gas cooler and Roots blower
It counts, is provided with pressure gauge on the spot on the boiler exhaust gas feeding pipe between the Roots blower and air accumulator.
It is provided with safety valve on the air accumulator, the second thermometer on the spot is additionally provided on the air accumulator.
The pulverized-coal fired boiler powder-supply system is from inerting and stable powder-supply system further includes compressed air feeding pipe, the pressure
Contracting air feed conduit includes for supplying branch, the first compression to the first compressed air of air accumulator supply compressed air
Air supply branch road is provided with the first pressure reducing valve.
The compressed air feeding pipe further includes for the second compressed air supply to deduster supply gas source
Branch, the second compressed air supply branch road are provided with the second pressure reducing valve.
It is provided with pneumatic control valve on the second gas supply under constant pressure pipeline, another part boiler tail after air accumulator pressure stabilizing
Gas is transferred to the coal dust tower after the pneumatic control valve；The compressed air feeding pipe further includes to the pneumatic tune
The third compressed air for saving valve supply gas source supplies branch.
By adopting the above-described technical solution, being had the beneficial effect that acquired by the utility model
1, boiler exhaust gas after cooling can be injected into coal dust tower by the utility model, gradually decreased oxygen content and reached very
To lower than the concentration for standardizing defined inert atmosphere requirement, realizes from inerting, inhibit coal dust oxidation, reduce the production of carbon monoxide
It is raw, it prevents coal dust from generating superheating phenomenon, makes in coal dust tower in temperature, oxygen content, the lower inert atmosphere of carbonomonoxide concentration
In, guarantee the safety of coal dust storage in coal dust tower.
2, pressure transmitter is installed at the measuring chute of the utility model, which being capable of real-time detection measuring chute
Interior atmospheric pressure value and while will test fructufy, are transmitted to combustion control system, combustion control system by the pressure transmitter come
The aperture for controlling shut-off valve stablizes the pressure in measuring chute in the range of setting value allows fluctuation, while substantially reduction is fallen
The pressure oscillation in measuring chute caused by broken arch during powder falling of powder and compressed air, realize the stabilization of coal dust, continuous supply,
It ensure that burning continuous and steady operation.
Detailed description of the invention
Fig. 1 is the systematic schematic diagram of the utility model.
Wherein,
1, boiler exhaust gas feeding pipe 2, the first gas supply under constant pressure pipeline 3, the second gas supply under constant pressure pipeline 4, air accumulator 5,
Measuring chute 6, coal dust tower 7, gas cooler 8, first thermometer 9, the first steam-water separator 10, Roots blower on the spot
11, on the spot pressure gauge 12, the second steam-water separator 13, deduster 14, pneumatic control valve 15, second pressure transmitter 16,
Second thermometer 17, first pressure transmitter 18, the first pressure reducing valve 19, the second pressure reducing valve 20, the first compressed air on the spot
It supplies branch 21, the second compressed air supply branch 22, third compressed air and supplies branch 23, shut-off valve 24, root valve
25, safety valve
Specific embodiment
The utility model is described in further detail with specific embodiment with reference to the accompanying drawing, but the utility model
It is not limited to these examples.
As shown in Figure 1, a kind of pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system, including combustion control system,
Air accumulator 4, coal dust tower 6, measuring chute 5, boiler exhaust gas feeding pipe 1, the first gas supply under constant pressure pipeline 2 and the second gas supply under constant pressure pipe
Road 3.The coal dust tower 6 supplies coal dust by measuring chute 5 described in material blanking tube road direction, and material blanking tube road is provided with discharge valve.
The boiler exhaust gas feeding pipe is used to supply boiler exhaust gas, the boiler exhaust gas supply pipe to the air accumulator 4
Curb boiler exhaust gas flow direction is disposed with gas cooler 7 and Roots blower 10, and gas cooler 7 is for reducing pot
The temperature of furnace exhaust gas, Roots blower 10 extract through the boiler exhaust gas after cooling of gas cooler 7 and add to boiler exhaust gas
The air accumulator 4 is delivered to after pressure.It is set on boiler exhaust gas feeding pipe between the gas cooler 7 and Roots blower 10
It is equipped with the first steam-water separator 9, by the boiler exhaust gas after cooling of gas cooler 7 first after the dehydration of the first steam-water separator 9
Just it is transported to the Roots blower 10.First steam-water separator 9 can be dehydrated boiler exhaust gas, reduce and enter coal
The moisture of powder tower 6 and measuring chute 5 prevents coal dust dampness, agglomeration, influences coal dust flowing.
In addition, being provided on boiler exhaust gas feeding pipe between the gas cooler 7 and the first steam-water separator 9
One thermometer 8 on the spot, be provided on the boiler exhaust gas feeding pipe between the Roots blower 10 and air accumulator 4 root valve 24 and
Pressure gauge 11 on the spot being connected with root valve 24.
Part pot of the first gas supply under constant pressure pipeline for connecting air accumulator 4 and measuring chute 5, after 4 pressure stabilizing of air accumulator
Furnace exhaust gas is transported to the measuring chute 5.In addition, being provided with 12 He of the second steam-water separator on the first gas supply under constant pressure pipeline
Deduster 13, the part boiler exhaust gas after 4 pressure stabilizing of air accumulator are successively just defeated after the second steam-water separator 12, deduster 13
It send to the measuring chute 5.
It is stored with measuring chute pressure in the combustion control system and stablizes setting value, is provided on measuring chute 5 for detecting
The first pressure transmitter 17 of air pressure in measuring chute 5, the air pressure actual measurement in the measuring chute 5 that first pressure transmitter 17 will test
It is worth real-time Transmission to the combustion control system, is provided with shut-off valve 23, combustion control system root on the first gas supply under constant pressure pipeline
The aperture of the shut-off valve 23 is controlled according to the comparison result that measuring chute Stability Design is worth gentle compacting measured value to realize to measuring chute 5
The stable control of interior pressure.
Another portion of the second gas supply under constant pressure pipeline for connecting air accumulator 4 and coal dust tower 6, after steady 4 pressure of air accumulator
Boiler exhaust gas is divided to be transported to the coal dust tower 6.
The pulverized-coal fired boiler powder-supply system is from inerting and stable powder-supply system further includes compressed air feeding pipe, and compression is empty
Gas feeding pipe is in case of emergency maintaining the pressure in air accumulator 4, while as the deduster 13 and following pneumatic
The gas source of regulating valve 14 plays a role.
Specifically, the compressed air feeding pipe includes for the of the air accumulator 4 supply compressed air
One compressed air supplies branch 20, is provided with the first pressure reducing valve 18 on the first compressed air supply branch 20.The compressed air
Feeding pipe further includes for supplying branch 21, second compression to the second compressed air of the deduster 13 supply gas source
The second pressure reducing valve 19 is provided on air supply branch 21.It is provided with pneumatic control valve 14 on the second gas supply under constant pressure pipeline 3,
Another part boiler exhaust gas after 4 pressure stabilizing of air accumulator is transferred to the coal dust tower 6 after the pneumatic control valve 14, pneumatically
Regulating valve 14 is used to control to adjust the exhaust gas volumn in injection coal dust tower 6, to achieve effective control powder supply pressure.The compressed air
Feeding pipe further includes supplying branch 22 to the third compressed air of the pneumatic control valve 14 supply gas source.
The second pressure transmitter 15 for detecting air pressure in air accumulator 4 is provided on the air accumulator 4, second pressure becomes
The atmospheric pressure value real-time Transmission in air accumulator 4 for sending device 15 will test is to the combustion control system.It is arranged on the air accumulator 4
There is safety valve 25, after the pressure in air accumulator 4 is more than setting pressure, safety valve 25 opens the gas in automatic-discharging air accumulator 4
Body guarantees safety to prevent 4 superpressure of air accumulator.The second thermometer 16 on the spot are additionally provided on the air accumulator 4.
In addition, equal at the boiler exhaust gas air inlet of the air accumulator 4, boiler exhaust gas gas outlet and compressed air inlet port
It is provided with shut-off valve, each shut-off valve is connected with the combustion control system, by combustion control system according to second pressure pick-up
The pressure measured value of the various pressure test parts such as device 15, on the spot pressure gauge controls the aperture of each shut-off valve, so that in air accumulator 4
Pressure is maintained to a lesser extent fluctuation, utmostly to ensure the stabilization, continuous of powder supply amount.
Certainly, the powder-supply system in the utility model not only includes a coal dust tower 6 and a measuring chute 5, can be with
Multiple coal dust towers 6 and multiple measuring chutes 5 are set, thus by the first gas supply under constant pressure pipeline 2 carry out branch with to multiple measuring chutes 5 into
Row boiler exhaust gas supply, by the second gas supply under constant pressure pipeline 3 carry out branch with to multiple coal dust towers 6 carry out boiler exhaust gas supply, one
A coal dust tower 6 corresponds to a measuring chute 5 and supplies coal dust.
In the utility model pulverized-coal fired boiler powder-supply system from inerting process be by the boiler tail of oxygen content low (3%~6%)
Gas is injected after processing in coal dust tower 6, is reached and is maintained to keep inert atmosphere in coal dust tower 6, inhibits coal dust oxidation, reduce by an oxygen
Change carbon generation, achieve the purpose that safe and stable storage coal dust, at the same can substantially reduce inert gas system scale, invest and
Operating cost.Powder-supply system in the utility model, using the boiler exhaust gas Jing Guo inerting, injects measuring chute from while inerting
In 5, the pressure oscillation as caused by broken arch or powder falling in operational process is substantially weakened, keeps powder supply more continuous, stable, favorably
Pressure oscillation is monitored in the continuous and steady operation of boiler, while by the pressure transmitter on measuring chute 5 to control each shut-off valve
Aperture, by the pressure in measuring chute 5 stablize in the range of running setting value and allowing to fluctuate (fluctuation range can maintain ±
Within 15mbar), to reach, boiler internal furnace pressure oscillation is small, combustion stablized purpose.
The part that do not address in the utility model uses or uses for reference prior art and can be realized.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relatively important
Property.
Specific embodiment described herein is only the spiritual example explanation to the utility model.This is practical
Novel person of ordinary skill in the field can make various modifications or additions to the described embodiments or adopt
It is substituted with similar mode, but without departing from the spirit of the present application or surmounts model defined in the appended claims
It encloses.
Claims (9)
1. a kind of pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system, which is characterized in that including combustion control system, storage
Gas tank, coal dust tower, measuring chute, boiler exhaust gas feeding pipe, the first gas supply under constant pressure pipeline and the second gas supply under constant pressure pipeline；It is described
Boiler exhaust gas feeding pipe is used to supply boiler exhaust gas to the air accumulator, and the boiler exhaust gas feeding pipe is along boiler exhaust gas stream
Dynamic direction is disposed with gas cooler and Roots blower, and Roots blower is extracted through gas cooler boiler after cooling
Tail gas is simultaneously delivered to the air accumulator after pressurizeing to boiler exhaust gas；The first gas supply under constant pressure pipeline is for connecting air accumulator
And measuring chute, the part boiler exhaust gas after air accumulator pressure stabilizing are transported to the measuring chute；The second gas supply under constant pressure pipeline
For connecting air accumulator and coal dust tower, another part boiler exhaust gas after air accumulator pressure stabilizing is transported to the coal dust tower；Institute
It states and is stored with the stable setting value of measuring chute pressure in combustion control system, be provided on measuring chute for detecting air pressure in measuring chute
First pressure transmitter, air pressure measured value real-time Transmission in the measuring chute that first pressure transmitter will test to the combustion
Burn control system, be provided with shut-off valve on the first gas supply under constant pressure pipeline, combustion control system according to measuring chute Stability Design value and
The comparison result of air pressure measured value controls the aperture of the shut-off valve to realize the control stable to pressure in measuring chute.
2. a kind of pulverized-coal fired boiler powder-supply system according to claim 1 is from inerting and stablizes powder-supply system, which is characterized in that
It is provided with the first steam-water separator on boiler exhaust gas feeding pipe between the gas cooler and Roots blower, by flue gas
Cooler boiler exhaust gas after cooling is just transported to the Roots blower after the dehydration of the first steam-water separator first.
3. a kind of pulverized-coal fired boiler powder-supply system according to claim 1 is from inerting and stablizes powder-supply system, which is characterized in that
It is provided with the second steam-water separator on the first gas supply under constant pressure pipeline, the part boiler exhaust gas after air accumulator pressure stabilizing passes through first
The measuring chute is just transported to after the dehydration of second steam-water separator.
4. a kind of pulverized-coal fired boiler powder-supply system according to claim 3 is from inerting and stablizes powder-supply system, which is characterized in that
It is additionally provided with deduster on the first gas supply under constant pressure pipeline, the part boiler exhaust gas after air accumulator pressure stabilizing is successively through the second vapour
The measuring chute is just transported to after separator, deduster.
5. a kind of pulverized-coal fired boiler powder-supply system according to claim 1 is from inerting and stablizes powder-supply system, which is characterized in that
The second pressure transmitter for detecting air pressure in air accumulator is provided on the air accumulator, second pressure transmitter will test
Air accumulator in atmospheric pressure value real-time Transmission to the combustion control system.
6. a kind of pulverized-coal fired boiler powder-supply system according to claim 1 is from inerting and stablizes powder-supply system, which is characterized in that
The first thermometer on the spot, sieve are provided on boiler exhaust gas feeding pipe between the gas cooler and Roots blower
Pressure gauge on the spot is provided on boiler exhaust gas feeding pipe between thatch air blower and air accumulator.
7. a kind of pulverized-coal fired boiler powder-supply system according to claim 4 is from inerting and stablizes powder-supply system, which is characterized in that
The pulverized-coal fired boiler powder-supply system is from inerting and stable powder-supply system further includes compressed air feeding pipe, and the compressed air supplies
It include for supplying branch, the supply of the first compressed air to the first compressed air of air accumulator supply compressed air to pipeline
Branch road is provided with the first pressure reducing valve.
8. a kind of pulverized-coal fired boiler powder-supply system according to claim 7 is from inerting and stablizes powder-supply system, which is characterized in that
The compressed air feeding pipe further includes supplying branch for supplying the second compressed air of gas source to the deduster, described
Second compressed air supply branch road is provided with the second pressure reducing valve.
9. a kind of pulverized-coal fired boiler powder-supply system according to claim 7 is from inerting and stablizes powder-supply system, which is characterized in that
It is provided with pneumatic control valve on the second gas supply under constant pressure pipeline, described in another part boiler exhaust gas warp after air accumulator pressure stabilizing
The coal dust tower is transferred to after pneumatic control valve；The compressed air feeding pipe further includes supplying to the pneumatic control valve
The third compressed air of gas source supplies branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820515408.6U CN208186404U (en) | 2018-04-12 | 2018-04-12 | Pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820515408.6U CN208186404U (en) | 2018-04-12 | 2018-04-12 | Pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system |
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| Publication Number | Publication Date |
|---|---|
| CN208186404U true CN208186404U (en) | 2018-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820515408.6U Expired - Fee Related CN208186404U (en) | 2018-04-12 | 2018-04-12 | Pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system |
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| CN (1) | CN208186404U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386866A (en) * | 2018-04-12 | 2018-08-10 | 扎克(青岛)船用设备有限公司 | Pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system |
-
2018
- 2018-04-12 CN CN201820515408.6U patent/CN208186404U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386866A (en) * | 2018-04-12 | 2018-08-10 | 扎克(青岛)船用设备有限公司 | Pulverized-coal fired boiler powder-supply system is from inerting and stablizes powder-supply system |
| CN108386866B (en) * | 2018-04-12 | 2023-11-24 | 扎克(青岛)船用设备有限公司 | Self-inerting and stable powder supply system of pulverized coal boiler |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181204 Termination date: 20200412 |