CN207146423U - A kind of preposition device for reducing dust of boiler back end ductwork - Google Patents
A kind of preposition device for reducing dust of boiler back end ductwork Download PDFInfo
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- CN207146423U CN207146423U CN201720902632.6U CN201720902632U CN207146423U CN 207146423 U CN207146423 U CN 207146423U CN 201720902632 U CN201720902632 U CN 201720902632U CN 207146423 U CN207146423 U CN 207146423U
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Abstract
The utility model discloses a kind of preposition device for reducing dust of boiler back end ductwork, including crossing smoke pipeline, laying dust passage, collection vessel and laying dust dividing plate, the upper and lower side of laying dust passage is each provided with an opening and is respectively communicated with the bottom for crossing smoke pipeline and collection vessel, it is articulated for blocking the laying dust dividing plate of its bottom opening by a jointed shaft in the side wall of laying dust passage, the drive component for driving jointed shaft to rotate is installed on laying dust passage；The content for entering flue dust in the flue gas in boiler back end ductwork is reduced, improves the heat exchange efficiency of high-temperature flue gas and superheater, economizer and air preheater, and to clearing up the advantages of more thorough, timely and convenient with flue dust.
Description
Technical field
Tail gas disposal technique field is the utility model is related to, more specifically, it relates to which a kind of boiler back end ductwork is preposition
Device for reducing dust.
Background technology
The heating boiler in power station back-end ductwork in actual motion is typically provided with superheater, economizer, air preheat
Device reclaims heat.Superheater：Absorb the heat of burner hearth flame and flue gas（Radiant superheater）Or the heat of flue gas in flue
Amount（Convection superheater）, saturated vapor is heated into superheated steam.Economizer：The low temperature part of back-end ductwork is arranged in, profit
With the heat of low-temperature flue gas, heating boiler feed water.Air preheater：After being arranged in economizer, the heat of the lower low-temperature flue gas of utilization,
Burner hearth or pulverized coal preparation system are sent into after air is heated, to improve boiler efficiency.The heat-transfer effect not only arrangement with heating surface
It is relevant, the temperature and flow velocity of structure, flue gas also with heating surface, the temperature of working medium and flow velocity, the cleaning situation of heating surface etc. because
It is known as pass.
A kind of low NOx fired again using pulverized coal pyrolysis gas is disclosed in Publication No. CN101761920A Chinese patent
Combustion method and device.The device of the technology mainly includes reheater, high temperature convection superheater, low temperature convection superheater, boiler
Back-end ductwork, economizer, air preheater, deduster, air-introduced machine, primary air piping etc..Its method is：Utilize pulverized-coal fired boiler afterbody
The part heat smoke of flue, which enters pyrolysis reactor, makes coal dust fast pyrogenation, and using pulverized coal pyrolysis gas as gas reburning fuel,
It is sent into pulverized-coal fired boiler reburning zone and efficiently reduces NOx, afterwards in pulverized-coal fired boiler burning-out zone completely burned, realizes the low of pulverized-coal fired boiler
NOx emission；Semicoke caused by pulverized coal pyrolysis then enters pulverized-coal fired boiler primary zone under First air carrying and completes burning.After burning
Flue gas successively by reheater, high temperature convection superheater, low temperature convection superheater, economizer, air preheater, deduster, draw
Blower fan is finally completed the burning that pulverized coal pyrolysis gas fires low NOx again to chimney.
Because in the above-mentioned technical solutions, the flue gas after burning is passing through dedusting again after economizer, air preheater
Device carries out dust removal process.Heating boiler product of the economizer of boiler back end ductwork and Air Preheater Heating Surface in actual motion
Ash is difficult to avoid that in operation, economizer and the air preheater heat transfer resistance caused by fouling of heating surface increase, high temperature cigarette
Gas declines with the heat exchange efficiency of superheater and economizer.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of boiler back end ductwork preposition drop
Dirt device, by preposition ash disposal, the dust stratification amount of the heating surface of superheater, economizer and air preheater is reduced, and then improved high
The heat exchange efficiency of warm flue gas and superheater, economizer and air preheater.
To achieve the above object, the utility model provides following technical scheme：
A kind of preposition device for reducing dust of boiler back end ductwork, including cross smoke pipeline, laying dust passage, collection vessel and laying dust every
Plate, the upper and lower side of laying dust passage are each provided with an opening and are respectively communicated with the bottom for crossing smoke pipeline and collection vessel, and laying dust leads to
It is articulated for blocking the laying dust dividing plate of its bottom opening by a jointed shaft in the side wall in road, drive is installed on laying dust passage
The drive component that jointed shaft rotates.
By using above-mentioned technical proposal, smoke pipeline is connected between cyclone separator and boiler back end ductwork, when
When the flue gas of cyclone separator discharge passed through smoke pipeline, dust and bulky grain flue dust in flue gas are deposited in laying dust passage
On laying dust dividing plate, after certain flue dust accumulation, drive jointed shaft to rotate by drive component, laying dust dividing plate is opened laying dust
The opening of the bottom of passage, flue dust is dropped into the collection vessel of lower section and be collected, boiler tail is entered so as to reduce
The content of flue dust in flue gas in portion's flue, reach and improved changing for high-temperature flue gas and superheater, economizer and air preheater
The purpose of the thermal efficiency；Meanwhile the flue dust on laying dust dividing plate drops into collection vessel, then laying dust dividing plate is gone back to by drive component
The opening of the bottom of original position closure laying dust passage so that the flue dust in collection vessel will not be blown afloat, so as to improve flue dust mistake
The operating efficiency of filter.
Further, it is in reclinate arc pipe along its length to cross smoke pipeline.
By using above-mentioned technical proposal, flue gas is when by the smoke pipeline excessively of reclinate arc pipe, in flue gas
Bulky grain flue dust be easier to fall into laying dust passage due to the effect of centrifugal force so that laying dust passage has reached more preferable cigarette
Dirt collecting effect.
Further, the bottom of laying dust passage and the upper end of collection vessel are respectively arranged with installation chimb one and installation chimb
Two, installation chimb one and installation chimb two are worn and tightened together by bolt.
By using above-mentioned technical proposal so that collection vessel it is detachable, be easy to in collection vessel flue dust carry out
Cleaning, and due to by loading and unloading bolt i.e. achievable assembly and disassembly between collection vessel and laying dust passage, simple operation.
Further, the bolt includes screw rod and nut, and screw rod is fixed on installation chimb one, and the side of nut is set
There is rotating handles.
, can direct rotating nuts by rotating handles, it is not necessary to extra dismounting work by using above-mentioned technical proposal
Tool so that the dismounting of collection vessel is more convenient.
Further, the spacing chimb for abutting laying dust dividing plate upper surface is provided with the side wall of laying dust passage, it is spacing
Chimb setting parallel with jointed shaft.
By using above-mentioned technical proposal, pass through spacing chimb and the abutting of laying dust dividing plate so that laying dust dividing plate plays more
Good sealing effectiveness, while certain position-limiting action is played, prevent laying dust dividing plate rotation start and stop position from misplacing, ensure that good
Good sealing.
Further, transparent windows are provided with the side wall of laying dust passage.
By using above-mentioned technical proposal, operating personnel can be easily recognized in laying dust passage by transparent windows
Flue dust accumulating amount, be easy to drive laying dust dividing plate to open by drive component in time, dust is cleaned to collection vessel in time
It is interior.
Further, transparent windows are in tilt down setting towards the one side on the inside of laying dust passage.
By using above-mentioned technical proposal, the flue dust on transparent windows surface is freely fallen due to Action of Gravity Field so that cigarette
Dirt is not easy to be bonded at the surface of transparent windows, it is ensured that the good field of view of transparent windows, more clearly recognizes laying dust
The accumulating amount of flue dust in passage.
Further, drive component includes the control electricity with the motor of jointed shaft drive connection and controlled motor start and stop
Road, control circuit are used to control the motor positive and inverse, and control circuit includes：
On-off circuit, for starting control circuit, and export a keying signal；
Circuit when selecting, it is respectively used to control for receiving the keying signal, and according to the keying signal successively output
The positive rotaring signal and reverse signal that the motor rotates and reverse；
Drive circuit, drive the motor first just for receiving the positive and negative rotaring signal, and according to the positive and negative rotaring signal
Turn, rear reversion.
By using above-mentioned technical proposal, pass through trigger switch circuit, you can pass through circuit and drive circuit control when selecting
Motor priority rotating, laying dust dividing plate is driven successively to automatically open up and block the opening of laying dust channel bottom, it is quick so as to reach
The purpose of dust in automation cleaning laying dust passage.
Further, the control circuit also includes：
Circuit is stalled, is coupled to when selecting between circuit and drive circuit, for postponing the reverse signal with controlled motor
After first rotating forward, stalling the scheduled time again, finally invert again.
By using above-mentioned technical proposal, laying dust dividing plate is driven to open laying dust channel bottom in control circuit controlled motor
After opening, one end time is stalled by stalling circuit motor, facilitates the flue dust in laying dust passage to be all slipped to receipts
Collect in container, then the opening for driving laying dust dividing plate to block laying dust channel bottom is inverted by control circuit, in laying dust passage
Dust plays good cleaning effect.
Compared with prior art, the utility model has the advantages that：
（1）When the flue gas of cyclone separator discharge passed through smoke pipeline, dust and the sedimentation of bulky grain flue dust in flue gas
Onto the laying dust dividing plate in laying dust passage, the content for entering flue dust in the flue gas in boiler back end ductwork is reduced, is reached
Improve the purpose of high-temperature flue gas and the heat exchange efficiency of superheater, economizer and air preheater；
（2）It is in reclinate arc pipe along its length to cross smoke pipeline, and flue gas is passing through reclinate curved pipe
When crossing smoke pipeline of road, bulky grain flue dust in flue gas because the effect of centrifugal force is easier to fall into laying dust passage so that
Laying dust passage has reached more preferable flue dust collecting effect；
（3）Collection vessel is detachably installed in laying dust passage lower end by bolt, and the side of nut is provided with rotation
Handle so that the cleaning to flue dust in collection vessel is more convenient；
（4）Transparent windows are provided with the side wall of laying dust passage, operating personnel can be easily by transparent windows
Recognize the accumulating amount of the flue dust in laying dust passage, be easy in time be cleaned to dust in collection vessel in time；
（5）Pass through trigger switch circuit, you can pass through circuit and drive circuit controlled motor priority rotating when selecting, drive
Laying dust dividing plate positive and negative rotation, reach the purpose of dust in rapid automatized cleaning laying dust passage.
Brief description of the drawings
Fig. 1 is the structural representation of the preposition device for reducing dust of boiler back end ductwork of the present embodiment；
Fig. 2 is between the preposition device for reducing dust of boiler back end ductwork, cyclone separator and boiler back end ductwork of the present embodiment
Mounting structure schematic diagram；
Fig. 3 is the internal structure schematic diagram of the preposition device for reducing dust of boiler back end ductwork of the present embodiment；
Fig. 4 is the circuit diagram of the control circuit of the present embodiment；
Fig. 5 is the circuit diagram of the power circuit of the present embodiment.
Reference：1st, smoke pipeline is crossed；2nd, laying dust passage；The 21st, chimb 1 is installed；22nd, transparent windows；3rd, collect and hold
Device；The 31st, chimb 2 is installed；4th, laying dust dividing plate；41st, jointed shaft；5th, cyclone separator；6th, boiler back end ductwork；7th, superheater；8、
Economizer；9th, air preheater；10th, bolt；101st, screw rod；102nd, nut；11st, rotating handles；13rd, spacing chimb；14th, it is electric
Machine；15th, control circuit；16th, on-off circuit；Circuit when the 17th, selecting；18th, drive circuit；19th, circuit is stalled；20th, power circuit；
23rd, the first delay circuit；24th, the second delay circuit；25th, the 3rd delay circuit.
Embodiment
With reference to the accompanying drawings and examples, the utility model is described in detail.
As shown in figures 1 and 3, the preposition device for reducing dust of a kind of boiler back end ductwork, including cross smoke pipeline 1, laying dust passage 2,
Collection vessel 3 and laying dust dividing plate 4.As shown in Fig. 2 smoke pipeline 1 is installed and connected in cyclone separator 5 and boiler tail cigarette
Between road 6.Superheater 7, economizer 8 and air preheater 9 are installed in boiler back end ductwork 6.As shown in figures 1 and 3, cigarette is crossed
Pipeline 1 is in reclinate arc pipe along its length.The upper and lower side of laying dust passage 2 is each provided with an opening and is respectively communicated with
Bottom and the collection vessel 3 of smoke pipeline 1.
Flue gas by reclinate arc pipe when crossing smoke pipeline 1, flue dust in flue gas due to self gravitation and
The effect of centrifugal force is fallen into laying dust passage 2, plays a part of flue dust collecting.Reduce and enter in boiler back end ductwork 6
The content of flue dust in flue gas, that is, the deposition of superheater 7, economizer 8 and the surface flue dust of air preheater 9 is reduced, is reached
Improve the purpose of high-temperature flue gas and the heat exchange efficiency of superheater 7, economizer 8 and air preheater 9.
As shown in figures 1 and 3, the bottom of laying dust passage 2 and the upper end of collection vessel 3 are respectively arranged with installation chimb 1
With installation chimb 2 31, installation chimb 1 and installation chimb 2 31 are worn and tightened together by bolt 10.Bolt 10 wraps
Screw rod 101 and nut 102 are included, screw rod 101 is fixed on installation chimb 1, and the side of nut 102 is provided with rotating handles 11.
By the rotating nuts 102 of rotating handles 11, the fast assembling-disassembling of bolt 10 is realized, and then by laying dust passage 2 and collection vessel 3
Between quick remove and install.The convenient cleaning to the flue dust in collection vessel 3.
Pass through the 41 articulated laying dust dividing plate 4 for being used for blocking its bottom opening of a jointed shaft, product in the side wall of laying dust passage 2
The drive component for driving jointed shaft 41 to rotate is installed on dirt passage 2.It is provided with the side wall of laying dust passage 2 for abutting laying dust
The spacing chimb 13 of the upper surface of dividing plate 4, spacing chimb 13 and 41 parallel setting of jointed shaft.By spacing chimb 13 and laying dust every
The abutting of plate 4 so that laying dust dividing plate 4 plays better seal effect, while plays certain position-limiting action, prevents laying dust dividing plate
4 rotation start and stop positions misplace.
Transparent windows 22 are installed in the side wall of laying dust passage 2.The side wall of laying dust passage 2 at the place of transparent windows 22
In tilting down setting, transparent windows 22 are parallelly mounted in the side wall for inner side, so that transparent windows 22 are towards product
The one side of the inner side of dirt passage 2 is in tilt down setting.
Operating personnel can easily recognize the accumulating amount of the flue dust in laying dust passage 2 by transparent windows 22.Thoroughly
The flue dust on the bright surface of observation window 22 is freely fallen due to Action of Gravity Field so that and flue dust is not easy to be bonded at the surface of transparent windows 22,
Ensure the good field of view of transparent windows 22, more clearly recognize the accumulating amount of the flue dust in laying dust passage 2.
As shown in figures 1 and 3, the control circuit 15 that drive component includes motor 14 and controlled motor 14 rotates.Motor
14 output shaft is fixed with the phase of jointed shaft 41, i.e., directly drives jointed shaft 41 to rotate by the output shaft of motor 14.
As shown in Figure 4 and Figure 5, control circuit 15 includes：
On-off circuit 16, for starting control circuit 15, and export a keying signal；
Circuit 17 when selecting, controlled motor 14 is respectively used to for receiving keying signal, and according to keying signal successively output
The positive rotaring signal and reverse signal rotated and reverse；
Drive circuit 18, for receiving positive and negative rotaring signal, and according to the forward or reverse of rotating signal drive motor 14；
Circuit 19 is stalled, is coupled to when selecting between circuit 17 and drive circuit 18, for postponing reverse signal to control electricity
Machine 14 first rotates forward, stall the scheduled time again after, finally invert again；
And the power circuit 20 of high level direct current is provided for control circuit 15.
As shown in figure 5, the input of power circuit 20 is coupled to 220V AC powers, exported after over commutation decompression filtering
First direct current Vout_1, first direct current Vout_1 are 12V；Second direct current Vout_2, second direct current Vout_2
For 5V, so that control circuit 15 uses.
As shown in figure 4, switch element includes reset switch S1, reset switch S1 first end is coupled to Vout_2, and it
Two ends export keying signal.
Circuit 17 includes when selecting：
First delay circuit 23, its input are coupled to reset switch S1 the second end, the delay of its output end output first
Comparison signal；
First OR gate OR_1, there is two inputs and an output end, its first input end to be coupled to reset switch S1
The second end, its second input is coupled to the output end of the first delay circuit 23；
First T trigger T_1, have control terminal T1, input end of clock CK1 and output end Q1, and its control terminal T1 is coupled to
Power circuit 20, its input end of clock CK1 is coupled to the first OR gate OR_1 output end, and exports positive transfering the letter in its output end Q1
Number；
Second delay circuit 24, its input are coupled to the first delay circuit 23 and the first OR gate OR_1 tie point, its
Output end output the second delay comparison signal；
Second OR gate OR_2, there is two inputs and an output end, its first input end to be coupled to the first deferred telegram
The OR gate OR_1 of road 23 and first tie point, its second input are coupled to the output end of the second delay circuit 24；
2nd T trigger T_2, have control terminal T2, input end of clock CK2 and output end Q2, and its control terminal T2 is coupled to
Power circuit 20, its input end of clock CK2 is coupled to the second OR gate OR_2 output end, and exports reversion letter in its output end Q2
Number.
Drive circuit 18 includes the model LG9110 driving chip of motor 14, and its PIN1 and PIN4 are respectively coupled to motor
14 positive terminal and negative pole end, PIN2 and PIN3 are coupled to power circuit 20, PIN5 and PIN8 ground connection, PIN6 and PIN7 difference couplings
It is connected to the first T triggers T_1 output end Q1 and the 2nd T triggers T_2 output end Q2.
Stalling circuit 19 is coupled to the 2nd T triggers T_2 output end Q2 and the PIN7 of the driving chip of motor 14 including one
Between the 3rd delay circuit 25, its input is coupled to the 2nd T triggers T_2 output end Q2, and its output end is coupled to electricity
The PIN7 of the driving chip of machine 14.
The operation principle of the control circuit 15 of the present embodiment is：
After operating personnel press reset switch S1, reset switch S1 exports a high level pulse, the first OR gate OR_1's
First input end receives the keying signal of high level, its output end output high level, simultaneously because the first delay circuit 23
Delayed-action, the input of the second delay circuit 24 and the second OR gate OR_2 first input end prolong also in low level, second
The output end of slow circuit 24 is also low level, and the second OR gate OR_2 exports low level, due at the beginning of output end Q1 and output end Q2
Beginning state exports zero level, and control terminal T1 and control terminal T2 connect the high level of power subsystem, the first T triggers T_1 clock
Input CK1 is high level, and its output end Q1 upsets are output high level, and the first T triggers T_1 input end of clock CK1 is
Low level, its output end Q2 keep output zero level, and the output end of the 3rd delay circuit 25 is also low level, i.e. motor 14 drives
The PIN6 of chip is high level, and PIN7 is low level, so that motor 14 rotates forward；
After the first delay circuit 23 reaches scheduled delay, it exports the output of high level, then the first OR gate OR_1
End output high level, making output end Q1 upsets for output zero level, the PIN6 of the driving chip of motor 14 is zero level, while second
The input of delay circuit 24 and the second OR gate OR_2 first input end are high level, due to the delay of the second delay circuit 24
Effect, the second OR gate OR_2 the second input the second OR gate OR_2 output high level, turn over output end Q2 also in low level
Switch to export high level, due to the delayed-action of the 3rd delay circuit 25, the PIN7 of the driving chip of motor 14 is also zero level, electricity
The both end voltage of machine 14 is zero, and motor 14 stalls；
Scheduled delay is reached in the 3rd delay circuit 25, its output end output high level, makes the driving chip of motor 14
PIN7 be high level, now PIN6 is zero level, so that motor 14 inverts；
After second delay circuit 24 reaches scheduled delay, its output end exports high level, overturns output end Q2 and is
Zero level is exported, then after the delay of the 3rd delay circuit 25, the PIN7 for making the driving chip of motor 14 is zero level, and now PIN6 is
Zero level, motor 14 is finally stalled, complete a control flow.
The operation principle of the preposition device for reducing dust of boiler back end ductwork of the present embodiment is：
When flue gas passed through smoke pipeline 1, flue dust falls into laying dust passage 2 and accumulated, and operating personnel pass through transparent observing
Window 22 is that the dust deposit amount in laying dust passage 2 can be observed；
After the flue dust in laying dust passage 2 runs up to a certain amount of, operating personnel are by pressing reset switch S1, control circuit
15 motors 14 drive jointed shaft 41 first to rotate forward so that laying dust dividing plate 4 opens the opening of the bottom of laying dust passage 2；
Then, controlled motor 14 is stalled the circuit of control circuit 15 again, and the flue dust in laying dust passage 2 is fallen into collection vessel 3；
Secondly, motor 14 drives jointed shaft 41 to invert to the circuit of control circuit 15 again so that laying dust dividing plate 4 blocks laying dust
The opening of the bottom of passage 2, controlled motor 14 stalls the circuit of control circuit 15 again, and laying dust passage 2 continues flue dust collecting effect,
Complete the transfer and storage of dust flue dust into collection vessel 3 in laying dust passage 2.
In addition, when in collection vessel 3 flue dust collecting to it is a certain amount of after, nut 102 is backed out by rotating handles 11, you can will
Collection vessel 3 is removed from the bottom of laying dust passage 2, after having cleared up collection vessel 3, then will installation chimb 1 and installation chimb 2 31
Push against together, and nut 102 is tightened by rotating handles 11, laying dust passage 2 and collection vessel 3 are tightened together, complete
The fast assembling-disassembling of collection vessel 3.
Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical schemes belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (9)
1. a kind of preposition device for reducing dust of boiler back end ductwork, it is characterised in that including crossing smoke pipeline (1), laying dust passage (2), receiving
Collection container (3) and laying dust dividing plate (4), the upper and lower side of laying dust passage (2) are each provided with an opening and are respectively communicated with to cross smoke pipeline
(1) bottom and collection vessel (3), it is used for blocking its bottom by the way that a jointed shaft (41) is articulated in the side wall of laying dust passage (2)
The laying dust dividing plate (4) of portion's opening, the drive component for driving jointed shaft (41) to rotate is installed on laying dust passage (2).
2. the preposition device for reducing dust of a kind of boiler back end ductwork according to claim 1, it is characterised in that cross smoke pipeline (1)
It is in reclinate arc pipe along its length.
A kind of 3. preposition device for reducing dust of boiler back end ductwork according to claim 1, it is characterised in that laying dust passage (2)
Bottom and collection vessel (3) upper end be respectively arranged with installation chimb one (21) and installation chimb two (31), installation chimb one
(21) wear and tighten together by bolt (10) with installation chimb two (31).
A kind of 4. preposition device for reducing dust of boiler back end ductwork according to claim 3, it is characterised in that the bolt (10)
Including screw rod (101) and nut (102), screw rod (101) is fixed on installation chimb one (21), and the side of nut (102) is set
There is rotating handles (11).
A kind of 5. preposition device for reducing dust of boiler back end ductwork according to claim 1, it is characterised in that laying dust passage (2)
Side wall on be provided with spacing chimb (13) for abutting laying dust dividing plate (4) upper surface, spacing chimb (13) and jointed shaft
(41) parallel setting.
A kind of 6. preposition device for reducing dust of boiler back end ductwork according to claim 5, it is characterised in that laying dust passage (2)
Side wall on be provided with transparent windows (22).
A kind of 7. preposition device for reducing dust of boiler back end ductwork according to claim 6, it is characterised in that transparent windows
(22) it is in tilt down setting towards the one side on the inside of laying dust passage (2).
8. the preposition device for reducing dust of a kind of boiler back end ductwork according to claim 1, it is characterised in that drive component includes
With the motor (14) of jointed shaft (41) drive connection and the control circuit (15) of controlled motor (14) start and stop, control circuit (15)
For controlling the motor (14) rotating, control circuit (15) includes：
On-off circuit (16), for starting control circuit (15), and export a keying signal；
Circuit (17) when selecting, it is respectively used to control for receiving the keying signal, and according to the keying signal successively output
The positive rotaring signal and reverse signal that the motor (14) rotates and reverse；
Drive circuit (18), the motor (14) is driven for receiving the positive and negative rotaring signal, and according to the positive and negative rotaring signal
First rotate forward, rear reversion.
A kind of 9. preposition device for reducing dust of boiler back end ductwork according to claim 8, it is characterised in that the control circuit
(15) also include：
Stall circuit (19), be coupled between circuit when selecting (17) and drive circuit (18), for postpone the reverse signal with
Controlled motor (14) first rotates forward, stall the scheduled time again after, finally invert again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720902632.6U CN207146423U (en) | 2017-07-24 | 2017-07-24 | A kind of preposition device for reducing dust of boiler back end ductwork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720902632.6U CN207146423U (en) | 2017-07-24 | 2017-07-24 | A kind of preposition device for reducing dust of boiler back end ductwork |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207146423U true CN207146423U (en) | 2018-03-27 |
Family
ID=61676595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720902632.6U Expired - Fee Related CN207146423U (en) | 2017-07-24 | 2017-07-24 | A kind of preposition device for reducing dust of boiler back end ductwork |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207146423U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146079A (en) * | 2020-09-22 | 2020-12-29 | 山东中实易通集团有限公司 | Supercritical unit pressure reduction blowing pipe system and method |
| CN114058775A (en) * | 2021-11-18 | 2022-02-18 | 无锡翔龙环球科技股份有限公司 | Multi-section expansion flue of waste heat boiler |
-
2017
- 2017-07-24 CN CN201720902632.6U patent/CN207146423U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146079A (en) * | 2020-09-22 | 2020-12-29 | 山东中实易通集团有限公司 | Supercritical unit pressure reduction blowing pipe system and method |
| CN112146079B (en) * | 2020-09-22 | 2022-12-09 | 山东中实易通集团有限公司 | Supercritical unit pressure reduction blowpipe system and method |
| CN114058775A (en) * | 2021-11-18 | 2022-02-18 | 无锡翔龙环球科技股份有限公司 | Multi-section expansion flue of waste heat boiler |
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