CN2481981Y - Dry ash transportation antiplugging mechanism for power station - Google Patents
Dry ash transportation antiplugging mechanism for power station Download PDFInfo
- Publication number
- CN2481981Y CN2481981Y CN 01218459 CN01218459U CN2481981Y CN 2481981 Y CN2481981 Y CN 2481981Y CN 01218459 CN01218459 CN 01218459 CN 01218459 U CN01218459 U CN 01218459U CN 2481981 Y CN2481981 Y CN 2481981Y
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- pipeline
- ash
- valve
- dry
- dust
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Abstract
The utility model relates to a dry dust delivery anti-blocking machinery for a power plant. A feed valve under a dust hopper is connected with the upper part of a stripping pump, and an air exhaust valve is arranged above the stripping pump. A discharge valve is arranged under the stripping pump, and connected with a dust delivering pipeline; a vulcanizing chamber is arranged under the stripping pump, a primary air feed controlling valve is arranged under the vulcanizing chamber, a secondary air feed controlling valve is connected with the dust delivering pipeline, and the dust delivering pipeline is connected with a dry dust warehouse. A following up air pipeline and a dredging air feed pipeline are adopted to divide the dust delivering pipeline into a plurality of sections, and the dust delivering pipeline is simultaneously pressurized, the divide and rule is adopted, thus the aim of rapid pipeline smoothness is achieved. Before happening, the blocking can be detected in advance, and can be solved in infancy. Even if the pipeline is completely blocked, the blocking can be eliminated in an inverse drawing way, without the influence on the production. The utility model can be widely applied to the dust and powder delivery in the industry, building materials, etc., the equipment is simple, the method is simple and effective, and all the indicators conform to the demand of the JB/T8470-96 in the positive pressure dense phase pneumatic conveying system.
Description
The utility model relates to a kind of Pneumatic pipe conveyer, particularly a kind of power plant dry ash transportation antiplugging mechanism.
Steam power plant is to be the power plant of power with the fire coal at present, and coal-fired consumption is big, has produced a large amount of flyash behind the coal combustion, i.e. dry ash.The wet method discharging of these dry ashes employings in the past is about to go out as waste discharge behind the dry ash water mix.This discharge method, the very big place that takies also pollutes to surrounding environment simultaneously.Adopted the dry method exhaust method afterwards.This exhaust method is the method that adopts strength to carry, and dry ash is transported in the dry ash warehouse by pipeline, and entrucking is then used as construction material.Reduced environmental pollution like this, can turn waste into wealth again.
Owing to exist factors such as frictional resistance and pressure oscillation in the ash handing pipeline, cause the defeated ash of pipeline not smooth, sometimes even cause pipeline blockage.Get rid of the method for stopping up and generally adopt pressure purge.But this method does not prove effective sometimes, tends to make the severe more of pipeline blockage, causes power plant's paralysis to stop production, and has to carry out artificial block clearing at last.
The utility model for solve above-mentioned dry ash carry in blockage problem, provide a kind of need not to shut down to get rid of stop up the power plant dry ash transportation antiplugging mechanism that purges conveying.
The utility model is to adopt to follow the tracks of air pipe and dredge aspirating pipeline ash handing pipeline is divided into plurality of sections.Occur block part in the ash handing pipeline, generally occur in a certain section of ash handing pipeline.The utility model pressurizes successively to block part in the ash handing pipeline exactly, divides and rule, and reaches pipeline unimpeded purpose rapidly.
The utility model is that dry ash carries out according to predefined pressure in course of conveying.The size of air pressure mainly is to be decided by factors such as the elbow in its conveying capacity, fed distance, the ash handing pipeline what and dry ash warehouse height.Dry ash in course of conveying, fluidisation the dry ash air-flow be similar to sine wave and push ahead.When pipeline was not smooth, system pressure increased, and sinusoidal wave amplitude reaches 5%, and mutation just takes place waveform, and wavelength dwindles, and frequency increases, and crest increases.It is exactly the omen of ash handing pipeline generation block part.When waveform fluctuation 10%, block part then appears in ash handing pipeline.
The utility model is that dry ash is through being collected in behind the electrostatic precipitation in the ash bucket, the inlet valve of ash bucket bottom and the top of storehouse pump are linked, open the inlet valve dry ash and enter the storehouse pump, the top of storehouse pump is provided with air bleeding valve, the bottom of storehouse pump is provided with bleeder valve, and is connected with ash handing pipeline.Blast pipe is the pressure reduction of regulating between ash bucket and the storehouse pump, makes blanking smooth and easy.The bottom of storehouse pump is provided with vulcanizing chamber, and the vulcanizing chamber bottom is provided with the pneumatic transmission gas control valve one time, and secondary pneumatic transmission gas control valve is connected with ash handing pipeline.When the dry ash amount reach the storehouse pump capacity 80% the time, close inlet valve, open pneumatic transmission gas control valve once gas enter the storehouse pump through the fluidising chamber of pump bottom, storehouse, dry ash is carried out fluidisation.Become the fluid of high-speed motion through the dry ash of fluidisation.Open bleeder valve, the dry ash air-flow enters ash handing pipeline.Ash handing pipeline is connected with the dry ash warehouse, and when the pressure of storehouse pump drops to a certain degree, bleeder valve cuts out, and this moment, secondary pneumatic transmission gas control valve was opened, and (its pressure is P to input secondary gas
2, be normal defeated grey pressure) enter ash handing pipeline and purge, dried blowing finally is admitted to the dry ash warehouse.
The utility model is along the ash handing pipeline tracking pipeline that be arranged in parallel, and several mediation aspirating pipelines are set between ash handing pipeline and tracking pipeline, and connect with following the tracks of pipeline with ash handing pipeline, the mediation control valve of supplying gas is set on the mediation aspirating pipeline, control with the mediation air delivery valve.Approximately per hundred meters one,, be arranged on the place that is easy to stop up perhaps according to site specific.Pressure transmitter is set on the ash handing pipeline, is used for measuring discharge pressure in the ash handing pipeline.Under the normal defeated grey situation, pipeline and pipeline are obstructed, and promptly valve cuts out.When transfer pipeline occur to stop up omen, pressure transmitter fed back to PLC with the pressure signal of ash handing pipeline, the PLC order pipeline the mediation control valve of supplying gas open, remove the block part in the ash handing pipeline, as shown in Figure 1.
Whole defeated grey process is by PLC (programmable controller) control, and in defeated grey process, PLC is monitoring anti-blocking system simultaneously, and the defeated ash of pipeline is not smooth, and loine pressure just can increase.If the turn on pump pressure of storehouse pump is P
1, the normal pressure that purges is P
2, pre-stifled pressure is P
H, the pressure during obstruction is P
DP
1＞P
2, P
HGenerally be higher than P
25%., and P
DMore than or equal to P
H5%.
Work as P
2＞P
HThe time, illustrate and occur pre-stifled omen in the ash handing pipeline, the mediation of the opening pipeline block part leading portion control valve of supplying gas, from following the tracks of the ash handing pipeline air inlet of pipeline block part leading portion to ash handing pipeline, the mediation of the opening pipeline block part back segment again control valve of supplying gas is supplied gas from the ash handing pipeline of following the tracks of pipeline block part back segment to ash handing pipeline, and the position that is about in the ash handing pipeline stop up is under the effect of pressed gas, purged and sent into the dry ash warehouse, as shown in Figure 1, 2.
After this P
2＜P
H, transfer pipeline is unimpeded, the mediation of the block part of the blinding off a line leading portion mediation of control valve and the pipeline blockage position back segment control valve of supplying gas of supplying gas, and ash handing pipeline recovers normal defeated grey operation.
Work as P
2〉=P
DThe time, or P
1〉=P
D, ash handing pipeline stops up, and the mode of then taking to pull out is carried out block clearing.Program is as follows: close mediation supply gas control valve and secondary pneumatic transmission gas control valve immediately, open bleeder valve and air bleeding valve, the pressure in the ash handing pipeline just by the storehouse pump, enter ash bucket, make the ash handing pipeline pressure release.The dry ash that gets lodged in the ash handing pipeline is sucked into storehouse and ash bucket 1.Still obstructed as ash handing pipeline, then close bleeder valve, open secondary pneumatic transmission gas control valve, advance secondary gas.Then close secondary pneumatic transmission gas control valve, open bleeder valve and air bleeding valve, like this repeatable operation several times, pipeline just can be dredged.As shown in Figure 1.
Every index of the present utility model all meets the requirement of " malleation dense phase pneumatic conveying system " JB/T8470-96.
The utility model is that dry ash is to carry out according to predefined pressure in course of conveying.The size of air pressure mainly is to be decided by factors such as how many dry ash warehouse height of the change head in its conveying capacity, fed distance, the carrier pipe.Dry ash is in course of conveying, and the dry ash air-flow of fluidisation is similar to sinusoidal wave to what push ahead, and the utility model is to adopt the tracking air pipe that ash handing pipeline is divided into plurality of sections, according to order, pressurizes in proper order backward in the past, divides and rule.Reach the purpose of mediation pipeline.The utility model just can be measured before stopping up generation in advance, and blockage problem is solved in bud.When pipeline stops up, adopt and pull out method and just can get rid of obstruction fast and effectively.The utility model can be widely used in the conveying of dust, powder of industries such as industry, building materials etc., and equipment is simple, and method is simple and effective.
The schematic diagram of Fig. 1 power plant dry ash transportation antiplugging mechanism
The schematic diagram of Fig. 2 ash handing pipeline block part
1 ash bucket, 2 inlet valves, 3 storehouse pumps, 4 pneumatic transmission gas control valves, 5 bleeder valves, 6 ash handing pipelines, 7 secondary pneumatic transmission gas control valves, 8 dry ash warehouses, 9 follow the tracks of pipeline, and 10 dredge the control valve of supplying gas, 11 fluidising chamber, 12 pressure transmitters, 13 air bleeding valves, 14 mediation aspirating pipelines, 15 block part
Below describe in detail with reference to accompanying drawing with embodiment.
Embodiment 1
Dry ash is collected in 1 li in ash bucket after electrostatic precipitator, the inlet valve of ash bucket bottom and the top of storehouse pump are linked, and opens inlet valve 2 dry ashes and enters storehouse pump 3, and the top of storehouse pump is provided with air bleeding valve 13, and the bottom of storehouse pump is provided with bleeder valve, and is connected with ash handing pipeline.Blast pipe is the pressure reduction of regulating between ash bucket 1 and the storehouse pump 3, makes blanking smooth and easy and be provided with.The bottom of storehouse pump is provided with vulcanizing chamber, and the vulcanizing chamber bottom is provided with the pneumatic transmission gas control valve one time, and secondary pneumatic transmission gas control valve is connected with ash handing pipeline.When the dry ash amount reach storehouse pump 3 capacity 80% the time, close inlet valve 2, open pneumatic transmission gas control valve 4 one time, once gas enters storehouse pump 3 through the fluidising chamber 11 of storehouse pump 3 bottoms, and dry ash is carried out fluidisation, dry ash becomes the fluid of high-speed motion.Open bleeder valve 5, the dry ash air-flow enters ash handing pipeline 6.Ash handing pipeline is connected with the dry ash warehouse, and when the pressure of storehouse pump 3 drops to a certain degree, bleeder valve 5 cuts out, and begins to purge.Open secondary pneumatic transmission gas control valve 7, (its pressure is P to feeding secondary gas
2, be normal defeated grey pressure), dry ash enters ash handing pipeline 6 and purges, and dry ash is blown into dry ash warehouse 8.Be arranged in parallel along ash handing pipeline 6 and to follow the tracks of pipeline 9, and ash handing pipeline 6 is provided with several mediation aspirating pipelines 14 with following the tracks of between the pipeline 9, and connect with following the tracks of pipeline 9, be provided with on the mediation aspirating pipeline 14 and dredge the control valve 10 of supplying gas with ash handing pipeline 6.Pressure transmitter 12 is set on ash handing pipeline 6 measures discharge pressure in the ash handing pipeline 6.Forced draft by transfer pipeline 6 is transported to dry ash warehouse 8 with dry ash.By tank car entrucking in bulk, be transported to the scene of using then.The position of the setting of mediation aspirating pipeline 14 and control valve 10 and what are decided on site specific.As shown in Figure 1.
Whole defeated grey process is by PLC (programmable controller) control, and in defeated grey process, PLC is monitoring anti-blocking system simultaneously, and the defeated ash of pipeline is not smooth, and loine pressure just can increase.If the turn on pump pressure of storehouse pump 3 is P
1, the normal pressure that purges is P
2, P
1＞P
2, pre-stifled pressure is P
H, the pressure during obstruction is P
DP
HGenerally be higher than P
25%., and P
DMore than or equal to P
H5%.
Work as P
2＞P
HThe time, illustrate and occur pre-stifled omen in the ash handing pipeline 6, the mediation of the opening pipeline block part 15 leading portions control valve 10 of supplying gas, from following the tracks of ash handing pipeline 6 air inlets of pipeline 9 block part 15 leading portions to ash handing pipeline 6, the mediation of the opening pipeline block part 15 back segments again control valve 10 of supplying gas, from following the tracks of ash handing pipeline 6 air inlets of pipeline 9 block part 15 back segments to ash handing pipeline 6, the position that will stop up in the ash handing pipeline 6 is under the effect of pressed gas, purged and sent into dry ash warehouse 8, as shown in Figure 1 and Figure 2.
Work as P
2＞P
H, transfer pipeline 6 is unimpeded, the mediation of the block part of the blinding off a line 15 leading portions mediation of control valve 10 and the pipeline blockage position 15 back segments control valve 10 of supplying gas of supplying gas, and ash handing pipeline 6 recovers normal defeated grey operation.
Embodiment 2
Work as P
2〉=P
DThe time, or P
1〉=P
D, ash handing pipeline 6 stops up, and can't normally fail ash.At this moment then to take to pull out the stifled mode of blowing.The PLC instruction is closed and is dredged supply gas control valve 10 and secondary pneumatic transmission gas control valve 7, opens bleeder valve 5 and air bleeding valve 13, and the pressure gas in the ash handing pipeline 6 just enters ash bucket 1 pressure release by storehouse pump 3, blast pipe 13.The dry ash that gets lodged in the ash handing pipeline 6 is arranged warehouse entry pump 3 and ash bucket 1, and ash handing pipeline 6 can be dredged.Still obstructed as ash handing pipeline 6, then close bleeder valve 5, open secondary pneumatic transmission gas control valve 7, advance secondary gas.Then close secondary pneumatic transmission gas control valve 7, open bleeder valve 5, like this repeatable operation several times, pipeline 6 just can be dredged.
Claims (1)
1, a kind of power plant dry ash transportation antiplugging mechanism is characterized in that dry ash through being collected in behind the electrostatic precipitation in the ash bucket, links the inlet valve of ash bucket bottom and the top of storehouse pump, and the top of storehouse pump is provided with air bleeding valve; The bottom of storehouse pump is provided with bleeder valve, and is connected with ash handing pipeline; The bottom of storehouse pump is provided with vulcanizing chamber, and the vulcanizing chamber bottom is provided with the pneumatic transmission gas control valve one time, and secondary pneumatic transmission gas control valve is connected with ash handing pipeline; Ash handing pipeline is connected with the dry ash warehouse; Along the ash handing pipeline tracking pipeline that be arranged in parallel, and ash handing pipeline and follow the tracks of several mediation aspirating pipelines are set between the pipeline, and connect with following the tracks of pipeline, the mediation control valve of supplying gas is set on the mediation aspirating pipeline with ash handing pipeline; Pressure transmitter is set on ash handing pipeline measures discharge pressure in the ash handing pipeline; Forced draft by transfer pipeline is transported to the dry ash warehouse with dry ash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01218459 CN2481981Y (en) | 2001-03-30 | 2001-03-30 | Dry ash transportation antiplugging mechanism for power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01218459 CN2481981Y (en) | 2001-03-30 | 2001-03-30 | Dry ash transportation antiplugging mechanism for power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2481981Y true CN2481981Y (en) | 2002-03-13 |
Family
ID=33636488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01218459 Expired - Lifetime CN2481981Y (en) | 2001-03-30 | 2001-03-30 | Dry ash transportation antiplugging mechanism for power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2481981Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457589C (en) * | 2006-03-31 | 2009-02-04 | 李玉清 | Method of realizing automatic block clearing and continuous operation of up flow type ash cabin pump |
| CN1923643B (en) * | 2006-09-04 | 2010-06-23 | 李玉清 | Method of alternately operating long-distance dredging and transportation for concentrated phase powdery material |
| CN102542895A (en) * | 2011-11-28 | 2012-07-04 | 南京工业职业技术学院 | Pneumatic conveying teaching device |
| CN102633124A (en) * | 2012-04-20 | 2012-08-15 | 福建龙净环保股份有限公司 | Saltation ash conveying control method |
| CN103121588A (en) * | 2013-02-28 | 2013-05-29 | 云南铝业股份有限公司 | Double-pipeline concentrated phase delivery system parallel discharge and blockage device and automatic control method |
| CN103600994A (en) * | 2013-11-22 | 2014-02-26 | 镇江市电站辅机厂有限公司 | Pneumatic limestone powder conveying system |
| CN105600465A (en) * | 2015-10-16 | 2016-05-25 | 南京钢铁股份有限公司 | Device and method for dredging powdery material conveying pipe |
| CN105600466A (en) * | 2015-11-27 | 2016-05-25 | 邹平创星环保设备有限公司 | Automatic pneumatic dredging valve |
-
2001
- 2001-03-30 CN CN 01218459 patent/CN2481981Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100457589C (en) * | 2006-03-31 | 2009-02-04 | 李玉清 | Method of realizing automatic block clearing and continuous operation of up flow type ash cabin pump |
| CN1923643B (en) * | 2006-09-04 | 2010-06-23 | 李玉清 | Method of alternately operating long-distance dredging and transportation for concentrated phase powdery material |
| CN102542895A (en) * | 2011-11-28 | 2012-07-04 | 南京工业职业技术学院 | Pneumatic conveying teaching device |
| CN102633124A (en) * | 2012-04-20 | 2012-08-15 | 福建龙净环保股份有限公司 | Saltation ash conveying control method |
| CN103121588A (en) * | 2013-02-28 | 2013-05-29 | 云南铝业股份有限公司 | Double-pipeline concentrated phase delivery system parallel discharge and blockage device and automatic control method |
| CN103121588B (en) * | 2013-02-28 | 2016-03-23 | 云南铝业股份有限公司 | The autocontrol method of a kind of dual circuit concentrated phase conveying system blockage-eliminating device in parallel |
| CN103600994A (en) * | 2013-11-22 | 2014-02-26 | 镇江市电站辅机厂有限公司 | Pneumatic limestone powder conveying system |
| CN105600465A (en) * | 2015-10-16 | 2016-05-25 | 南京钢铁股份有限公司 | Device and method for dredging powdery material conveying pipe |
| CN105600466A (en) * | 2015-11-27 | 2016-05-25 | 邹平创星环保设备有限公司 | Automatic pneumatic dredging valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110330 Granted publication date: 20020313 |