CN209147818U - A kind of rotary cleaning system for rotary regenerative air preheater - Google Patents
A kind of rotary cleaning system for rotary regenerative air preheater Download PDFInfo
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- CN209147818U CN209147818U CN201821822188.8U CN201821822188U CN209147818U CN 209147818 U CN209147818 U CN 209147818U CN 201821822188 U CN201821822188 U CN 201821822188U CN 209147818 U CN209147818 U CN 209147818U
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Abstract
The utility model relates to a kind of rotary cleaning system for rotary regenerative air preheater, the horizontal turntable of the air side entrance including being set to air preheater, the horizontal support tube and successively the liquid carbon dioxide storage tank of pipeline connection, dry ice pelletizer, nozzle sets for being radially fixed to turntable upper surface；Air compressor is connected to the dry ice particles storage chamber pipeline of dry ice pelletizer, and dry ice particles are blown to nozzle sets and are sprayed；Nozzle in nozzle sets is axially installed on support tube upper surface along support tube at equal intervals；It is connected between nozzle sets and dry ice pelletizer by several hoses penetrated in support tube；Driving mechanism drives turntable to rotate around disk axes in 180 degree；Pipeline between air compressor and dry ice pelletizer is equipped with air filter.The support tube of the utility model is connect with turntable, can be carried out 180o rotation with turntable, be run spray gun compared with normal reciprocating, effectively shorten spray gun length of connecting rod, required air preheater exterior space is less, applied widely.
Description
Technical field
The utility model relates to a kind of rotary cleaning systems for rotary regenerative air preheater, belong to air preheater
Cleaning equipment field.
Background technique
As country is to the increasingly strict of environmental requirement, coal-fired power station boiler mostly uses greatly SCR, and (selective catalytic reduction is de-
Nitre technology), SCR mainly uses NH3NO and NH is realized in catalyst layer for reducing agent3Reaction, generate H2O and N2, realization pair
Effective removing of NO in flue gas.Fluctuation and the national stringent pipe to coal-fired power station boiler atmosphere pollution due to power plant load
Control, thermal power plant mostly use the mode of excessive spray ammonia to guarantee that pollutant emission reaches national emission standard, but excessive the escaping of ammonia
It can be with the SO in flue gas3And H2O reacts, and generates (NH4)2SO4.After flue gas enters rotary regenerative air preheater, with cigarette
Temperature gradually decreases, (NH4)2SO4It is in a liquid state at 147~250 DEG C, in this temperature region, (NH4)2SO4It will be attached to rotary
On air preheater heat accumulation plate, due to liquid (NH4)2SO4Viscosity it is larger, can also with the flying dust in flue gas formed solid matter
It is deposited on the heat accumulation plate of air preheater, and gradually forms incrustation, block exhaust gases passes between heat accumulation plate.In addition, with denitration
Abrasion, accumulation and blocking of the flying dust to denitrating catalyst in the partial failure of catalyst, flue gas, can increase ammonia spraying amount, cause
The multiple blocking of rotary regenerative air preheater, seriously affects the safe operation of rotary regenerative air preheater.
Currently, power plant mostly uses high pressure water or high steam to clean the region blocked, high steam is such as used
Not only steam loss amount is big for cleaning, and block clearing effect is not obvious；Such as using high pressure water cleaning, not only water consumption is big, and clear
A large amount of waste liquids can be generated after washing, due in waste liquid contain part flying dust, need could discharge after treatment, increase cleaning at
This.In addition, existing rinse-system, equipment mostly uses telescoping lance structure, in order to go deep into air preheater interior flushing, spray
Rifle need to be connected compared with long connecting rod, this just needs to have larger space outside air preheater, for power plant of having gone into operation, install such equipment
It will be limited by arrangement space.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of for the rotary clear of rotary regenerative air preheater
System is washed, which connect with turntable, can carry out with turntable
180 ° of rotations run spray gun compared with normal reciprocating, effectively shorten spray gun length of connecting rod, required air preheater exterior space compared with
It is few, it is applied widely.
The technical solution of the utility model is as follows:
A kind of rotary cleaning system for rotary regenerative air preheater, the air side including being set to air preheater
The horizontal turntable of entrance, the horizontal support tube for being radially fixed to turntable upper surface and the successively liquid of pipeline connection
Carbon dioxide holding tank, dry ice pelletizer, nozzle sets；Air compressor and the dry ice particles storage chamber pipeline of dry ice pelletizer connect
It is logical, dry ice particles are blown to nozzle sets and are sprayed；Nozzle in nozzle sets is axially installed on support tube upper end along support tube at equal intervals
Face；It is to be connected to by several hoses penetrated in support tube between nozzle sets and dry ice pelletizer；One driving mechanism drives turntable
It is rotated around disk axes in 180 degree；Air filter is provided on pipeline between air compressor and dry ice pelletizer.
Wherein, it is provided with respectively cylinder between several hoses and dry ice pelletizer outlet, respectively cylinder one end is made with dry ice
Grain machine outlet, the other end are in the truncated cone-shaped that bore is gradually increased；It is respectively provided with inwardly in the middle part of the end face of the cylinder other end convex
It rises；And respectively the end face of the cylinder other end along protrusion circumferencial direction be evenly arranged with several through-holes；Inside through-hole and respectively cylinder
Connection；Respectively spiral rifling is provided on cylinder inner wall；Number of openings is corresponding with nozzle quantity, and several through-holes and nozzle
It is connected one to one between each nozzle in group by several hoses.
Wherein, the driving mechanism includes propeller and horizontally disposed rack gear；The push rod of propeller and rack gear one end are solid
Fixed connection；Push rod radially moves back and forth in the air side entrance of air preheater；The turntable is that periphery setting is with teeth
Tooth form turntable；Turntable is placed in the air side entrance of air preheater by a support construction；It is vertical by one in the middle part of turntable
The connection structure and support construction of setting are rotatablely connected；The tooth form of rack gear is arranged towards side and engages with tooth form turntable periphery；
The push rod of propeller is flexible, and band carry-over bar is flexible, to drive tooth form turntable to rotate.
Wherein, the rotary cleaning system for rotary regenerative air preheater, further includes pre- for detecting air
The differential pressure transmitter of hot device import and export pressure difference.
Wherein, the rotary cleaning system for rotary regenerative air preheater, further includes pre- for detecting air
The temperature difference transmitter of the hot device import and export temperature difference.
Wherein, the rotary cleaning system for rotary regenerative air preheater, the liquid carbon dioxide storage
First check-valve and the first motor-driven valve are disposed on the pipeline that tank is connected to dry ice pelletizer；Dry ice pelletizer and respectively cylinder
Second check-valve is provided on the pipeline of connection；Third is disposed on the pipeline that air filter is connected to dry ice pelletizer
Check-valves and the second motor-driven valve.
Wherein, the rotary cleaning system for rotary regenerative air preheater, the injection direction of the nozzle sets
It is identical as flow direction of the air in air preheater.
The utility model has the following beneficial effects:
1, the utility model support tube is connect with turntable, and 180 ° of rotations can be carried out with turntable, runs and sprays compared with normal reciprocating
Rifle, effectively shortens spray gun length of connecting rod, and required air preheater exterior space is less, and nozzle deflects certain angle flushing out air
Between preheater heat accumulation plate when incrustation, several nozzle rinse areas are more concentrated.
2, the utility model is provided with respectively cylinder, and air-flow is through dry ice pelletizer, vertically into respectively cylinder, along respectively cylinder
The rotation of spiral shape smooth bore line, when guaranteeing that several outlets of cylinder are divided equally in outflow, flow is substantially divided equally.
3, the utility model utilizes high pressure dry ice particles gasflow clean-up technology, stores to impact cleaning rotary regenerative air preheater
Incrustation between hot plate.Its principle makes with dry ice particles working media, generates high gas fixed double phase flow through air compressor, then passes through
Nozzle accelerate, fouled surface is rushed at high-speed jet, wash away, degrade and dry ice particles collision explosion under the action of, make to accumulate
Dirt is detached from heating surface surface, can realize the on-line cleaning to it in the case where not influencing air preheater normal operation, and
Any by-product is not generated, and cleaning effect is preferable.
4, the temperature difference and pressure difference data of the control system of the utility model according to rotary regenerative air preheater inlet and outlet two sides
Judge the stopping state in air preheater, the exportable clear instruction of operator, can also by advance in controller it is pre-
If value, to determine to carry out automatic on-line cleaning under which kind of stopping state.
5, the driving mechanism setting of the utility model is simple, easy to operate.
Detailed description of the invention
Fig. 1 is the positive schematic diagram of internal structure of the utility model；
Fig. 2 is the enlarged structure schematic diagram of the local D of the utility model；
Fig. 3 is the schematic diagram of internal structure for dividing equally cylinder of the utility model；
The left view for dividing equally cylinder that Fig. 4 is Fig. 2 of the utility model；
Fig. 5 is the overlooking structure diagram of Fig. 1 of the utility model；
Fig. 6 is the control circuit part connection figure of the utility model.
Appended drawing reference indicates in figure are as follows:
1, turntable；11, support construction；12, connection structure；2, air compressor；3, air filter；4, liquid dioxy
Change carbon storage tank；5, dry ice pelletizer；6, nozzle sets；7, hose；8, driving mechanism；81, propeller；810, push rod；82, tooth
Item；9, divide equally cylinder；91, raised；92, through-hole；93, rifling；10, support tube；100, air preheater；101, air preheater stores
Hot plate；300, controller；400, differential pressure transmitter；500, temperature difference transmitter；601, first check-valve；602, the first motor-driven valve；
603, second check-valve；604, third check-valves；605, the second motor-driven valve；700, active station；900, axle center.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
The direction A is air-flow direction in Fig. 1, and the direction B is flow of flue gas direction.
Referring to Fig. 1-5, a kind of rotary cleaning system for rotary regenerative air preheater, including it is set to air preheat
The horizontal turntable 1 of the air side entrance C of device 100, the horizontal support tube 10 for being radially fixed to 1 upper surface of turntable and
Successively the liquid carbon dioxide storage tank 4 of pipeline connection, dry ice pelletizer 5, nozzle sets 6；Air compressor 2 and dry ice pelletizer
Dry ice particles are blown to nozzle sets 6 and sprayed by 5 dry ice particles storage chamber pipeline connection；Nozzle in nozzle sets 6 is along support tube 10
It is axial to be installed on 10 upper surface of support tube at equal intervals；It is to penetrate support tube by several between nozzle sets 6 and dry ice pelletizer 5
Hose 7 in 10 is connected to；One driving mechanism 8 drives turntable 1 to rotate around 1 axle center 900 of turntable in 180 degree；Air compressor 2 with
Air filter 3 is provided on pipeline between dry ice pelletizer 5.Several jet impacts clean rotary regenerative air preheater accumulation of heat
101 incrustation of plate.
Referring to Fig. 1-4, respectively cylinder 9 are provided between several hoses 7 and the outlet of dry ice pelletizer 5, respectively 9 one end of cylinder
With 5 outlet of dry ice pelletizer, the other end is in the truncated cone-shaped that bore is gradually increased；Respectively court in the middle part of the end face of 9 other end of cylinder
Inside it is provided with protrusion 91；And respectively the end face of 9 other end of cylinder along protrusion 91 circumferencial direction be evenly arranged with several through-holes
92；It is connected to inside through-hole 92 and respectively cylinder 9；Respectively spiral rifling 93 is provided on 9 inner wall of cylinder；92 quantity of through-hole and spray
Unrounded number is corresponding, and is connected one to one between each nozzle in several through-holes 92 and nozzle sets 6 by several hoses 7.
Air-flow is through dry ice pelletizer 5, and vertically into respectively cylinder 9, the spiral shape rifling 93 in respectively cylinder 9 rotates, to guarantee that outflow is equal
When dividing three outlets of cylinder 9, flow is substantially divided equally.
Referring to Fig. 1, Fig. 2 and Fig. 5, the driving mechanism 8 includes propeller 81 and horizontally disposed rack gear 82；Propeller
81 push rod 810 is fixedly connected with 82 one end of rack gear；Push rod 810 radially comes in the air side entrance C of air preheater 100
Return is dynamic；The turntable 1 is that tooth form turntable with teeth is arranged in periphery；Turntable 1 is placed in air preheat by a support construction 11
The air side entrance C of device 100；It is rotatablely connected in the middle part of turntable 1 by a connection structure 12 being vertically arranged and support construction 11；
The tooth form of rack gear 82 is arranged towards side and engages with tooth form turntable periphery；The push rod 810 of propeller 81 is flexible, band carry-over bar 82
It is flexible, to drive tooth form turntable to rotate.In the present embodiment, nozzle is connect with tooth form turntable, and 180 ° of rotations can be carried out with tooth form turntable
Turning, runs spray gun compared with normal reciprocating, effectively shorten spray gun length of connecting rod, required 100 exterior space of air preheater is less, and
When nozzle deflects 101 incrustation of certain angle flushing out air preheater heat accumulation plate, several nozzle rinse areas are more concentrated.
Referring to Fig. 1, the rotary cleaning system for rotary regenerative air preheater, further includes for detecting air
The differential pressure transmitter 400 of 100 import and export pressure difference of preheater.
Referring to Fig. 1, the rotary cleaning system for rotary regenerative air preheater, further includes for detecting air
The temperature difference transmitter 500 of the 100 import and export temperature difference of preheater.
Referring to Fig. 1, the rotary cleaning system for rotary regenerative air preheater, the liquid carbon dioxide is deposited
First check-valve 601 and the first motor-driven valve 602 are disposed on the pipeline that storage tank 4 is connected to dry ice pelletizer 5；Dry ice is granulated
Second check-valve 603 is provided on machine 5 and the pipeline that respectively cylinder 9 is connected to；The pipe that air filter 3 is connected to dry ice pelletizer 5
Third check-valves 604 and the second motor-driven valve 605 are disposed on road.
Referring to Fig. 1, the rotary cleaning system for rotary regenerative air preheater, the injection direction of the nozzle
It is identical as flow direction of the air in air preheater 100.
Referring to Fig. 1-5, the propeller 81 is electric plating propulsion or pneumatic booster.It is outstanding that Xuzhou can be selected in electric plating propulsion
The model JNTJ-1 electric plating propulsion of energy power equipment Co., Ltd；It is limited that Xuzhou outstanding person energy power equipment can be selected in pneumatic booster
The model JNTJ-2 pneumatic booster of company.
Referring to Fig. 6, a kind of rotary cleaning system for rotary regenerative air preheater, further includes control circuit, control
Circuit includes single-chip microcontroller P1, display screen CMP1, touch screen CMP2 and driver P2, and single-chip microcontroller P1 uses 51 single-chip microcontrollers；Driver
P2 uses relay driving chip, model XC2023；The display screen CMP1's and touch screen CMP2 and single-chip microcontroller P1 is logical
Communication interface is bi-directionally connected, and the input terminal of the driver P2 connects the control signal output of single-chip microcontroller P1, and single-chip microcontroller P1 is directly read
The data for taking temperature difference transmitter 500 and differential pressure transmitter 400 judge through discriminating program built in PLC, export and control through driver P2
Signal controls propeller 81, and display screen CMP1 is used for the display of real time temperature and pressure parameter, and touch screen CMP2 for joining manually
Several inputs.The I/O interface of single-chip microcontroller P1 be also respectively connected with the first motor-driven valve 602, the second motor-driven valve 605, air compressor 2 with
And dry ice pelletizer 5；To control their opening and closing (not shown).
Working principle of the utility model is:
The detection of pressure difference signal and temperature signal: the air that differential pressure transmitter 400 and temperature difference transmitter 500 will test is pre-
The pressure difference signal and temperature signal of the inlet and outlet of hot device 100 are transferred to single-chip microcontroller P1；
Dry ice particles cleaning: it is artificially input operation instruction by touch screen CMP2 to single-chip microcontroller P1；Single-chip microcontroller P1 control the
One motor-driven valve 602 is opened, and the liquid carbon dioxide in liquid carbon dioxide storage tank 4 is passed through in dry ice pelletizer 5；Meanwhile it is single
Piece machine P1 controls the second motor-driven valve 605 and opens, and air compressor 2 and air filter 3 work；Compressed air is passed through dry ice to make
Grain machine 5 carries dry ice particles and sequentially enters after respectively cylinder 9, hose 7 and nozzle product between scavenging air preheater heat accumulation plate 101
Dirt；
Rotary-cleaning: the push rod of single-chip microcontroller P1 control propeller 81 protrudes into 100 air side entrance of air preheater radially
Length, several nozzle rotations of tooth form driven by rotary disc, nozzle deflect certain angle flushing out air preheater heat accumulation plate 101 between product
Dirt.
The above description is only the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are also included in the patent protection scope of the utility model.
Claims (7)
1. a kind of rotary cleaning system for rotary regenerative air preheater, it is characterised in that: including being set to air preheat
The horizontal turntable (1) of the air side entrance (C) of device (100), the horizontal support for being radially fixed to turntable (1) upper surface
Manage (10) and successively the liquid carbon dioxide storage tank (4) of pipeline connection, dry ice pelletizer (5), nozzle sets (6)；Air pressure
Contracting machine (2) is connected to the dry ice particles storage chamber pipeline of dry ice pelletizer (5), and dry ice particles are blown to nozzle sets (6) and are sprayed；Spray
Nozzle in mouth group (6) is axially installed on support tube (10) upper surface along support tube (10) at equal intervals；Nozzle sets (6) are made with dry ice
It is by several hose (7) connections penetrated in support tube (10) between grain machine (5)；One driving mechanism (8) drive turntable (1) around
Turntable (1) axle center (900) is rotated in 180 degree；It is arranged on pipeline between air compressor (2) and dry ice pelletizer (5) free
Air filter (3).
2. the rotary cleaning system according to claim 1 for rotary regenerative air preheater, it is characterised in that: several
Respectively cylinder (9) are provided between the hose (7) and dry ice pelletizer (5) outlet, respectively cylinder (9) one end and dry ice pelletizer
(5) outlet, the other end are in the truncated cone-shaped that bore is gradually increased；Respectively it is provided with inwardly in the middle part of the end face of cylinder (9) other end
Raised (91)；And respectively the end face of cylinder (9) other end along the circumferencial direction of raised (91) is evenly arranged with several through-holes (92)；
It is connected to inside through-hole (92) and respectively cylinder (9)；Respectively spiral rifling (93) are provided on cylinder (9) inner wall；Through-hole (92) number
Amount is corresponding with nozzle quantity, and passes through several hoses (7) one between each nozzle in several through-holes (92) and nozzle sets (6)
One is correspondingly connected with.
3. the rotary cleaning system according to claim 1 or 2 for rotary regenerative air preheater, it is characterised in that:
The driving mechanism (8) includes propeller (81) and horizontally disposed rack gear (82)；The push rod (810) and rack gear of propeller (81)
(82) one end is fixedly connected；Push rod (810) radially moves back and forth in the air side entrance (C) of air preheater (100)；Institute
Stating turntable (1) is that tooth form turntable with teeth is arranged in periphery；Turntable (1) is placed in air preheater by a support construction (11)
(100) air side entrance (C)；Pass through a connection structure (12) being vertically arranged and support construction (11) in the middle part of turntable (1)
Rotation connection；The tooth form of rack gear (82) is arranged towards side and engages with tooth form turntable periphery；The push rod (810) of propeller (81)
Flexible, band carry-over bar (82) is flexible, to drive tooth form turntable to rotate.
4. the rotary cleaning system according to claim 3 for rotary regenerative air preheater, it is characterised in that: also wrap
Include the differential pressure transmitter (400) for detecting air preheater (100) import and export pressure difference.
5. the rotary cleaning system according to claim 4 for rotary regenerative air preheater, it is characterised in that: also wrap
Include the temperature difference transmitter (500) for detecting air preheater (100) import and export temperature difference.
6. the rotary cleaning system according to claim 5 for rotary regenerative air preheater, it is characterised in that: described
First check-valve (601) and are disposed on the pipeline that liquid carbon dioxide storage tank (4) is connected to dry ice pelletizer (5)
One motor-driven valve (602)；Second check-valve (603) are provided on the pipeline that dry ice pelletizer (5) is connected to respectively cylinder (9)；Air
Third check-valves (604) and the second motor-driven valve are disposed on the pipeline that filter (3) is connected to dry ice pelletizer (5)
(605)。
7. the rotary cleaning system according to claim 1 for rotary regenerative air preheater, it is characterised in that: described
The injection direction of nozzle sets (6) is identical as flow direction of the air in air preheater (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821822188.8U CN209147818U (en) | 2018-11-07 | 2018-11-07 | A kind of rotary cleaning system for rotary regenerative air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821822188.8U CN209147818U (en) | 2018-11-07 | 2018-11-07 | A kind of rotary cleaning system for rotary regenerative air preheater |
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| Publication Number | Publication Date |
|---|---|
| CN209147818U true CN209147818U (en) | 2019-07-23 |
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ID=67272552
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821822188.8U Active CN209147818U (en) | 2018-11-07 | 2018-11-07 | A kind of rotary cleaning system for rotary regenerative air preheater |
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| CN (1) | CN209147818U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210985A (en) * | 2018-11-07 | 2019-01-15 | 山西国科节能有限公司 | A kind of rotary cleaning system for rotary regenerative air preheater |
| CN112682814A (en) * | 2020-12-22 | 2021-04-20 | 南京市利澜电力节能科技有限公司 | Blockage clearing device and method for multiple air preheater systems |
-
2018
- 2018-11-07 CN CN201821822188.8U patent/CN209147818U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109210985A (en) * | 2018-11-07 | 2019-01-15 | 山西国科节能有限公司 | A kind of rotary cleaning system for rotary regenerative air preheater |
| CN112682814A (en) * | 2020-12-22 | 2021-04-20 | 南京市利澜电力节能科技有限公司 | Blockage clearing device and method for multiple air preheater systems |
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