CN208108134U - Pulverized-coal fired boiler soot cleaning system - Google Patents
Pulverized-coal fired boiler soot cleaning system Download PDFInfo
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- CN208108134U CN208108134U CN201820185983.4U CN201820185983U CN208108134U CN 208108134 U CN208108134 U CN 208108134U CN 201820185983 U CN201820185983 U CN 201820185983U CN 208108134 U CN208108134 U CN 208108134U
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- ash bucket
- pulverized
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- fired boiler
- coal fired
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Abstract
A kind of pulverized-coal fired boiler soot cleaning system, it is characterized in that it includes installing several gas explosion devices on the inner sidewall of ash bucket, gas explosion device includes gas outlet in the shape of a trumpet and the air inlet pipe with gas outlet Natural communication, air inlet pipe passes through ash bucket side wall and extends to outer ash bucket and acetylene gas pipe and air line, igniter is provided in air inlet pipe, solenoid valve is provided on acetylene gas pipe and air hose, igniter and solenoid valve are electrically connected with PLC.The problem of can solve dust stratification in horizontal internal combustion Pulverized Coal fired Boiler Furnace.
Description
Technical field
The utility model relates to a kind of pulverized-coal fired boilers, more particularly to a kind of full-automatic dust stratification solved in Pulverized Coal fired Boiler Furnace
And the pulverized-coal fired boiler soot cleaning system of transportation problem.
Background technique
The more common coal-burning boiler of pulverized-coal fired boiler has the advantage that：1, coal dust centralizedly supply, coal dust by mill house concentration grind,
Unified supply, quality of pc are stablized.2, working environment is friendly：Total system enclosed operation goes up coal automatically, concentrates ash discharge, without dust
It is simple that race emits 3, boiler start/ stop：Boiler system may be implemented to stop to open, and 30 seconds cutting incendiary sources enter normal operation, cut off coal
Powder supply 4, controlled level are high：Automatic monitoring reduces the influence 5 to boiler operatiopn of labor intensity and human factor, efficiently section
Energy：The thermal efficiency of coal-powder boiler is up to 90% or more, and common coal-burning boiler can't greatly save the energy and reduce environment dirt up to 80%
Dye.
The primary structure of pulverized-coal fired boiler is as follows：Boiler water enters in upper drum 1, in the case where upper drum 1 is flowed into through convection bank 2
Drum 3, upper lower drum are connected by convection bank 2, are burner hearth 9 on the right side of upper lower drum, and burner hearth 9 is the component of boiler combustion, furnace
Thorax 9 is made of several hollow mode wall pipes 4, is welded between neighboring modes wall pipe 4 by band steel, but hollow mode wall pipe lower part
For no band steel, upper and lower two sides are header, and water enters lower header 5 through down-comer by lower drum 3, and the water of lower header is through mode wall 4
Upper collecting chamber 6 is imported after heated, after upper drum 1 entered by upper collecting chamber 6.Coal dust is the very thin coal particle of mill, it is conveyed from coal bunker
High-temperature flue gas is formed after to burner 7 after burner is lighted to flow from the front to the back in openning shape burner hearth 9, after coal dust firing
Powder is ash, and ash about 10% is fallen into 8 in ash bucket in burner hearth, remaining turns to 180 degree at burner hearth rear portion with high-temperature flue gas and enters pair
Flowing bundle 2 flows into external flue in convection bank 2 from the front to the back, by the vent gas treatments such as deduster and desulfurizing tower dress
Atmosphere is discharged into after standby.
The ash in coal dust afterburnt is more loose in burner hearth, and openning type burner hearth 9 does not have band steel that ash is allow to fall into ash in lower part
Bucket 8, but ash is excessively loose in a practical situation, and when ash quantity is larger, ash is not easy to fall in 4 in ash bucket, but direct gear is in burner hearth
In two adjacent mode wall pipes 4, after first layer dust stratification is formed, heat transfer deterioration is generated since bottom pipe cannot conduct heat,
Dust stratification in burner hearth 9 is sharply increased, so that boiler output is reduced, burner hearth blocking.
Utility model content
The utility model in view of the shortcomings of the prior art, proposes a kind of pulverized-coal fired boiler soot cleaning system.
The technical measures taken of the utility model are：A kind of pulverized-coal fired boiler soot cleaning system, it includes in ash bucket
Install several gas explosion devices on side wall, gas explosion device includes gas outlet in the shape of a trumpet and the air inlet with gas outlet Natural communication
Pipe, air inlet pipe are extended to outside ash bucket across ash bucket side wall and are connected to two tracheaes, and two tracheaes are respectively acetylene gas pipe and air
Pipe, is provided with igniter in air inlet pipe, is provided with solenoid valve on acetylene gas pipe and air hose, igniter and solenoid valve with
PLC electrical connection, controls the opening and closing of gas explosion device.
Acetylene gas and air in acetylene gas pipe and air hose are ignited device and light generation explosion after mixing in air inlet pipe,
Explosion gas forms impact air-flow, and impact air-flow is discharged into corresponding position along bell mouth shape gas outlet, so that ash bucket top, mode
Dust stratification between wall pipe is smoothly fallen into ash bucket.
Gas outlet is the position of dust stratification most serious towards the center of mode wall pipe.The outlet degree of lip-rounding of gas explosion device
Shape is bell mouth shape, and the air-flow of generation can radiate entire ash bucket.
Ash bucket is that upper end opening made of steel plate is big, and the small structure funnel-shaped of lower ending opening is installed with electricity on the downside of ash bucket
Dynamic unloading valve, electric cinder valve are closely connect with ash bucket.Electric cinder valve is electrically connected with PLC.The switch of electric cinder valve is by PLC
Control, may be implemented sealing function when static, and the air-flow for generating the dust stratification of ash bucket lower part and gas explosion device is from passing through.Electricity
Dynamic unloading valve is motor drive, and gas explosion device and electric cinder valve can disturb dust stratification with synergy.It is logical in electric cinder valve
Electric late gate is opened, and dust stratification is discharged into the grey channel of lower part.
It is provided with grey channel below electric cinder valve, the front end in grey channel is provided with soot blowing blower, in grey channel
Rear end be connected to ash cellar, soot blowing blower is electrically connected with PLC.Grey channel, which is mainly risen, saves dust stratification, and soot blowing blower will be in grey channel
Dust stratification be blown into the ash cellar at rear portion.If the soot-blowing wind owner in ash cellar front end realizes the effect of purging, switch is controlled by PLC
System.
The utility model has the beneficial effects that PLC can realize that gas explosion device is opened after some time, while will be electronic
Unloading valve is closed；Acetylene gas and air in acetylene gas pipe and air hose be ignited after being mixed in air inlet pipe device light generate it is quick-fried
Fried, explosion gas forms impact air-flow, and impact air-flow is discharged into corresponding position along bell mouth shape gas outlet, so that ash bucket top,
Dust stratification between mode wall pipe is smoothly fallen into ash bucket.Electric cinder valve is opened after gas explosion device；It is closed after some time of interval
Close electric cinder valve；The front end blower for opening grey channel purges some time；Purging finishes whole system closing.It can also be in this base
Realize that DCS is remotely controlled on plinth.
Detailed description of the invention
Fig. 1 is pulverized-coal fired boiler soot cleaning system structural schematic diagram.Fig. 2 is the left view of Fig. 1.
In figure：1- upper drum；2- convection bank；3- lower drum；4- mode wall pipe；5- lower header；6- upper collecting chamber；7- burning
Device；8- ash bucket；9- burner hearth；10- gas explosion device；11- electric cinder valve；12- ash channel；13- soot blowing blower；14- air inlet pipe；
15- acetylene gas pipe；16- air hose；The gas outlet 17-.
Specific embodiment
As shown in Figure 1, a kind of pulverized-coal fired boiler soot cleaning system, it includes that several gas explosion dresses are installed on the inner sidewall of ash bucket 8
10 are set, gas explosion device 10 includes gas outlet 17 in the shape of a trumpet and the air inlet pipe 14 with 17 Natural communication of gas outlet, air inlet pipe
14 extend to ash bucket 8 across 8 side wall of ash bucket is connected to two tracheaes outside, and two tracheaes are respectively acetylene gas pipe 15 and air hose
16, it is provided with igniter in air inlet pipe 14, is provided with solenoid valve, igniter and electromagnetism on acetylene gas pipe 15 and air hose 16
Valve is electrically connected with PLC, controls the opening and closing of gas explosion device.Acetylene gas pipe 15 and acetylene gas in air hose 16 and air exist
It is ignited device after mixing in air inlet pipe 14 and lights generation explosion, explosion gas forms impact air-flow, and impact air-flow is along bell mouth shape
Gas outlet 17 is discharged into corresponding position, so that the dust stratification between 8 top of ash bucket, mode wall pipe 4 is smoothly fallen into ash bucket 8.
Gas outlet 17 is the position of dust stratification most serious towards the center of mode wall pipe 4.The gas outlet of gas explosion device
17 opening shapes are bell mouth shape, and the air-flow of generation can radiate entire ash bucket 8.
Ash bucket 8 is that upper end opening made of steel plate is big, and the small structure funnel-shaped of lower ending opening is installed on the downside of ash bucket 8
Electric cinder valve 11, electric cinder valve 11 and ash bucket 8 are tightly connected.Electric cinder valve 11 is electrically connected with PLC.Electric cinder valve 11
Switch controlled by PLC, sealing function may be implemented when static, make 8 lower part of ash bucket dust stratification and gas explosion device 10 generate
Air-flow cannot pass through.Electric cinder valve 11 is motor drive, and gas explosion device 10 can be disturbed with electric cinder valve 11 with synergy
Dynamic dust stratification.It is opened in 11 energization late gate of electric cinder valve, dust stratification is discharged into the grey channel 12 of lower part.
The lower section of electric cinder valve 11 is provided with grey channel 12, the front end in grey channel 12 is provided with soot blowing blower 13,
It is connected to ash cellar in the rear end in grey channel 12, soot blowing blower 13 is electrically connected with PLC.Grey channel 12, which is mainly risen, saves dust stratification, soot blowing
Dust stratification in grey channel 12 is blown into the ash cellar at rear portion by blower 13.Soot blowing blower 13 in ash cellar front end mainly realizes purging
Effect, switch controlled by PLC.
Claims (4)
1. a kind of pulverized-coal fired boiler soot cleaning system, it is characterized in that it includes installing several gas explosion devices, gas on the inner sidewall of ash bucket
Quick-fried device includes gas outlet in the shape of a trumpet and the air inlet pipe with gas outlet Natural communication, and air inlet pipe extends across ash bucket side wall
With acetylene gas pipe and air line outside to ash bucket, it is provided with igniter in air inlet pipe, is set on acetylene gas pipe and air hose
It is equipped with solenoid valve, igniter and solenoid valve are electrically connected with PLC.
2. pulverized-coal fired boiler soot cleaning system according to claim 1, it is characterized in that centre bit of the gas outlet towards mode wall pipe
It sets.
3. pulverized-coal fired boiler soot cleaning system according to claim 1, it is characterized in that ash bucket is that upper end opening made of steel plate is big,
The small structure funnel-shaped of lower ending opening, is installed with electric cinder valve on the downside of ash bucket, and electric cinder valve is closely connect with ash bucket, electricity
Dynamic unloading valve is electrically connected with PLC.
4. pulverized-coal fired boiler soot cleaning system according to claim 3, it is characterized in that being provided with ash below electric cinder valve
Channel is provided with soot blowing blower in the front end in grey channel, is connected to ash cellar in the rear end in grey channel, soot blowing blower is electrically connected with PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820185983.4U CN208108134U (en) | 2018-02-02 | 2018-02-02 | Pulverized-coal fired boiler soot cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820185983.4U CN208108134U (en) | 2018-02-02 | 2018-02-02 | Pulverized-coal fired boiler soot cleaning system |
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| Publication Number | Publication Date |
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| CN208108134U true CN208108134U (en) | 2018-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820185983.4U Active CN208108134U (en) | 2018-02-02 | 2018-02-02 | Pulverized-coal fired boiler soot cleaning system |
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| CN (1) | CN208108134U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446597A (en) * | 2021-07-30 | 2021-09-28 | 西安热工研究院有限公司 | Secondary air box for preventing large air box of cyclone burner from accumulating ash, boiler system and method |
-
2018
- 2018-02-02 CN CN201820185983.4U patent/CN208108134U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446597A (en) * | 2021-07-30 | 2021-09-28 | 西安热工研究院有限公司 | Secondary air box for preventing large air box of cyclone burner from accumulating ash, boiler system and method |
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