CN207688146U - Power station boiler ash on-line measurement system - Google Patents
Power station boiler ash on-line measurement system Download PDFInfo
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- CN207688146U CN207688146U CN201820017164.9U CN201820017164U CN207688146U CN 207688146 U CN207688146 U CN 207688146U CN 201820017164 U CN201820017164 U CN 201820017164U CN 207688146 U CN207688146 U CN 207688146U
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- slag
- ash
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Abstract
The utility model provides a kind of power station boiler ash on-line measurement system, and the power station boiler ash on-line measurement system includes：Boiler slag well；Dry slag conveyer；Slag crusher；Lime-ash weigher；Slag storehouse；Wherein, the slag crusher connects dry slag conveyer, and dry slag conveyer connects boiler slag well；The lime-ash weigher includes：Metal Chain plate scales, the shell being enclosed in except the metal Chain plate scales and the weighing sensor being arranged on the lateral wall of the shell；Wherein, metal Chain plate scales described in the housings close；The weighing sensor is connect with DCS signals, and DCS is connect with dry slag conveyer signal.The utility model realizes the intelligentize and informatization of boiler slag removal systematic survey, and the measurement of boiler ash discharge capacity is realized for the first time in power industry.
Description
Technical field
The utility model is related to field of thermal power, and in particular to the boiler ash of power industry discharges, i.e., a kind of power station
Boiler ash on-line measurement system.
Background technology
Solid product after coal dust burns in large-size thermal power plant boiler is divided into flying dust and clinker two major classes, in order to and
Shi Qingli solid products design ash-transmission system and dreg removing system, and dreg removing system is divided into as conventional hydraulic dreg removing system and nearly 30 years
The air cooling dry dreg removing system that fast development is got up.Compared to conventional hydraulic dreg removing system technology, air cooling dry dreg removing system has section
Water, energy conservation and environmental protection, reduces the advantages that maintenance fund, therefore 300MW-1000MW fire coals thermoelectric generator in recent years at heat loss recycling
The more designs of group use air cooling dry dreg removing system.Simultaneously part earlier operation unit also because automatic control operation stability compared with
Difference, maintenance is big etc., and reasons are replaced with air cooling dry dreg removing system by upgrading.
At present large coal-fired boiler furnace bottom routine deslagging scheme be drain into slag storehouse by the links such as conveying, being crushed, promoted, then
Periodically lime-ash transport vehicle is emitted into through slag storehouse bottom slag discharge to transport.With each power plant's air cooling dry dreg removing system putting equipment in service, by
Gradually expose some influence Boiler Economical Operation, safeties the problem of, principal focal point problem include slag drying machine bottom leak out it is super
Crossing design value causes the reduction of Boiler Furnace effect, slag drying machine running speed are too fast rotatable parts abrasion is caused to increase maintenance cost, slag storehouse
The middle quantity of slag measures the problems such as inaccurate, operating maintenance way to manage is slightly mad.
In conclusion problems with exists in the prior art：Existing dry dreg removing system design only considers that transport discharge is asked
It inscribes, account for quantitative statistics, cannot achieve boiler bottom lime-ash discharge capacity and measure in real time.
Utility model content
The utility model provides a kind of power station boiler ash on-line measurement system, can not to solve existing dry dreg removing system
Realize the problem of boiler bottom lime-ash discharge capacity measures in real time.
For this purpose, the utility model proposes a kind of power station boiler ash on-line measurement system, for boiler ash discharge capacity
It measures, the power station boiler ash on-line measurement system includes：
Boiler slag well；
Dry slag conveyer；
Dry slag conveyer slag crusher；
Lime-ash weigher；
Slag storehouse；
Accident bypass duct is connected between the slag crusher and the slag storehouse, and accident bypass duct is arranged in institute
It states except shell；
Wherein, the lime-ash weigher connects slag crusher, and slag crusher connects dry slag conveyer, and dry slag conveyer passes through dry slag
Convey band connection boiler slag well；
The lime-ash weigher includes：Metal Chain plate scales, are arranged in institute the shell being enclosed in except the metal Chain plate scales
The weighing and sensing stated the entrance on shell, outlet on the housing is set and is arranged on the lateral wall of the shell
Device；
Wherein, metal Chain plate scales described in the housings close, the entrance connect the slag crusher, and the outlet connects slag
Storehouse；The entrance is located at the top of the outlet.
Further, the weighing sensor is mounted on by thermal insulation layer on the lateral wall of the shell.
Further, the power station boiler ash on-line measurement system further includes：DCS, i.e. scattered control system, the title
Sensor is retransmitted to connect with DCS signals.
Further, the lime-ash weigher further includes：Weigher entrance material blanking tube is arranged in the inlet and connects
The slag crusher.
Further, the lime-ash weigher further includes：Weigher exports material blanking tube, is arranged in the exit and connects
The slag storehouse.
Further, the power station boiler ash on-line measurement system further includes：Side on accident bypass duct is set
Port valve door.
Further, the metal Chain plate scales convey boiler ash by steel band, and the steel band is driven by motor, described
Motor is arranged except the shell.
Further, the shell it is lateral on offer maintenance window.
Further, the maintenance window is located at the same side of the shell with the weighing sensor.
The utility model carries out boiler slag removal amount using weighing measuring method and continuously measures, and realizes the survey of boiler slag removal system
The intelligentize and informatization of amount realizes the measurement of boiler ash discharge capacity for the first time in power industry, have real-time, continuity,
Accuracy feature.The utility model is weighed scheme using physics, and measurement accuracy is protected, maximum error of measuring 1%.This
Utility model adds shell outside metal Chain plate scales, close metal Chain plate scales, adapts to boiler emission lime-ash high temperature, easy airborne dust is answered
Miscellaneous working environment.The utility model carries out high temperature-proof design to load cells elements, utmostly reduces ambient enviroment to member
The heat of part is transmitted, and service life of equipment is improved, and is convenient for element on-bne repair.The utility model passes through boiler slag removal systematic survey
Intelligentize and informatization, can global scope assessment boiler slag removal situation, auxiliary direction safe and economical boiler operation, compare steel band
Nominal transmission weight controls the operation conditions of boiler.
Description of the drawings
Fig. 1 is the structural schematic diagram of the power station boiler ash on-line measurement system of the utility model；
Fig. 2 is the structural schematic diagram of the lime-ash weigher of the utility model.
Drawing reference numeral explanation：
1, boiler slag well；10, slag underground clan material mouth；2, dry slag conveyer；21, dry slag conveyor outlet material blanking tube；
3, slag crusher；4, lime-ash weigher；
40, weighing sensor；41, motor；43, shell；45, entrance；46, maintenance window；47, it exports；
5, slag storehouse；50, slag storehouse platform；
6, accident bypass duct；61, inclined tube section；62, vertical segment.
Specific implementation mode
For a clearer understanding of the technical features, objectives and effects of the utility model, existing control description of the drawings
The utility model.
As depicted in figs. 1 and 2, the power station boiler ash on-line measurement system of the utility model includes：
Boiler slag well 1, bottom has slag underground clan material mouth 10, for slagging tap；
Dry slag conveyer 2 is used for ash-slag delivery；
Slag crusher 3 is crushed the bottom ash of bulk；
Lime-ash weigher 4, weighs to lime-ash；
Slag storehouse 5 stores lime-ash, has slag storehouse platform 50；
Wherein, the slag crusher 3 connects dry slag conveyer 2, and dry slag conveyer 2 conveys band connection boiler slag well by dry slag
1；
The lime-ash weigher 4 includes：Metal Chain plate scales, the shell 43 being enclosed in except the metal Chain plate scales, setting
Entrance 45 on the housing, setting outlet 47 on the housing and it is arranged on the lateral wall of the shell
Weighing sensor 40；Weighing measurement working range 0-30t/h；
Wherein, the shell 43 closes the metal Chain plate scales, and the outside of shell 43 can be by metal, such as by steel plate system
At the inside of shell 43 can be equipped with refractory material layer or thermal insulation layer；Weigher full-closed structure, metal Chain plate scales use steel band
Lime-ash is transmitted, high temperature resistant is influenced small by material high temperature, and solving the common belt type weighing machine of power industry cannot be heat safe
Disadvantage；Thus the utility model measurement error is small, precision is high, realizes and in real time, continuously measures；The design of weigher lower part cleans chain,
Lime-ash continuous-cleaning to the slag notch for falling into weigher bottom space is drained, accumulation in casing is prevented；
The entrance 45 connects the slag crusher 3, and weigher entrance material blanking tube is provided at entrance 45, and the outlet connects
Slag storehouse 5；It is provided with weigher at outlet 47 and exports material blanking tube, the entrance is located at the top of the outlet；Slag storehouse platform
It is arranged in slag storehouse platform 50；
Further, the power station boiler ash on-line measurement system further includes：DCS, i.e. scattered control system, Neng Goushi
The functions such as existing data real-time display, statistics, analysis, early warning, control；
The weighing sensor 40 is connect with DCS signals, and DCS connect (such as wired company with dry 2 signal of slag conveyer
Connect), it can realize data real-time display, statistics, analysis.The data that weighing sensor 40 measures in real time are transmitted by communication cable
Into Monitor Computer Control System (DCS), to lime-ash discharge capacity abnormal alarm, realize remote monitoring show, store, real-time tendency,
Historical trend, stove effect calculates and the functions such as alarm
Further, as shown in Fig. 2, the weighing sensor 40 is mounted on the lateral wall of the shell 43 by thermal insulation layer
On.To prevent lime-ash high temperature, dust from being had an impact to weighing sensor service life, measurement accuracy, the utility model is set
Meter is on the outside of lime-ash weigher seal casinghousing.Heat-barrier material is arranged between sensor element lower part and support metal flat；With sensing
The bolt that device probe contacts transmit weighing loading signal is changed to heat-barrier material by stainless steel.
As shown in Fig. 2, the metal Chain plate scales convey boiler ash by steel band, the steel band is driven by motor 41,
The motor 41 is arranged except the shell 43, is influenced by high temperature to avoid motor.
Further, the information for the real-time grey quantity of slag that the DCS is transmitted according to weighing sensor, controls dry slag conveyer certainly
Dynamic variable frequency adjustment reduces dry slag conveyor apparatus abrasion.
Further, the information for the real-time grey quantity of slag that the DCS is transmitted according to weighing sensor, calculates and shows clinker sensible heat
Loss, can monitor and alarm in real time.
Further, the information for the real-time grey quantity of slag that the DCS is transmitted according to weighing sensor, calculates and shows that clinker accounts for always
Ash content ratio accounts for the alarm of total ash abnormal proportion, global scope assessment boiler slag removal situation, auxiliary direction boiler safety warp to clinker
Ji operation.
Further, the power station boiler ash on-line measurement system further includes：Accident bypass duct 6 is connected to described
Between slag crusher 3 and the slag storehouse 5, for example, being connected between dry slag conveyor outlet material blanking tube 21 and slag storehouse 5；And accident
Bypass duct 6 is arranged except the shell 43.The design of lime-ash weigher accident bypass duct 6 ensures boiler rated loan condition
Smooth deslagging down.6 upper side of accident bypass duct is equipped with observation manhole, prevents lime-ash and is blocked in bypass.
Further, the power station boiler ash on-line measurement system further includes：It is arranged on the accident bypass duct
Bypath valve, with facilitate control.As depicted in figs. 1 and 2, the accident bypass duct 6 includes：Think 61 He of inclined tube section of connection
Vertical segment 62, the inclined tube section 61 connect dry slag conveyer 2 and intersect with vertical direction at an angle, and the vertical segment 62 is set vertically
The slag storehouse 5 is set and connects, the inclined tube section 61 is equal with the cross-sectional area of vertical segment 62.
Further, slag crusher outlet material maximum volume flow is 33.3m3The angle /h, α is 50 degree, the accident bypass
Line size is 400 × 400mm.The selection course of accident bypass conduit dimensions is：Lime-ash weigher at full capacity when material bed cross
Sectional area is 0.66m × 0.16m, and lime-ash natural deposited dry density is exported with dry slag system design maximum output 20t/h, slag crusher
0.6t/m3, be calculated outlet material maximum volume flow be Vmax=33.3m3/ h then corresponds to lime-ash weigher linear speed at this time
Spend u=0.088m/s；Vmax=S × U α × k when lime-ash is conveyed from accident deslagging shunt valve, wherein Vmax are the maximum rows of bypass
Slag volume flow, takes 33.3t/h；U α are bypass inclined tube section material flows, consider that the relationship between U α and u is U α=U × sin α,
I.e. α=90 ° when material material is conveyed with weigher rotating speed, delivery rate is 0 when α=0 °；α is bypass inclined tube section and horizontal direction
Angle, take 50 °；Inclined tube section lime-ash repose angle of material is 50 ° more than 40 ° of bulk material angle of repose recommendation at this time；K is to ensure
Coefficient considers that practical slip velocity takes 0.9 less than design value situation.It is computed S=0.153m2, i.e., when accident bypass duct is cut
Area is more than 0.153m2When can meet boiler peak load operating mode deslagging demand, by this design accident bypass duct section ruler
Very little is 400mm × 400mm.
Further, as shown in Fig. 2, the shell 43 it is lateral on offer one or more maintenance windows 46, so as to
Lime-ash weigher is repaired in time and easily.
Further, the maintenance window 46 is located at the same side of the shell with the weighing sensor 40, is located at behaviour
Make the side that personnel are easy observation, to observe and to repair.
The working process of the utility model is as follows：Bottom slag passes through slag well, into dry-type slag extractor (dry slag conveyer), dry
The air cooling of the flowing sucked by negative pressure in stove on formula slag extractor conveyer belt, the air heated enter with the heat of warm sludge
Boiler furnace, bottom ash after cooling falls into slag crusher as the movement of dry-type slag extractor conveyer belt is carried over, after disintegrating slag crusher machine,
The lime-ash weigher for falling into arranged beneath is weighed, and finally dropping downward into slag storage by the outlet of lime-ash weigher deposits.
Certain boiler of power plant original is designed as conventional dry dreg removing system, i.e. boiler bottom slag falls into dry type slag crusher, quilt across slag well
It is delivered to disintegrating slag crusher machine, finally falls into slag storehouse.By being transformed to its dreg removing system, lime-ash on-line measurement system is proposed：
Increase lime-ash weigher system equipment, realize that bed drain purge continuously measures monitoring function, while realizing correlation computations analysis and early warning
Function.
First according to former dry slag system design maximum output 20t/h, slag crusher outlet lime-ash natural deposited dry density 0.6t/
m3, be calculated slag crusher outlet material maximum volume flow be 33.3m3/ h in conjunction with slag crusher outlet size, thereby determines that ash
Slag weigher feeding mouth size is 660 × 500mm, discharge port size is 875 × 400mm, weigher steel band blanking width is
480mm, blanking maximum height are 177mm, finally determine lime-ash weigher device structure size, steel conveyor belt maximum (top) speed.
Original design slag crusher lower part outlet is directly connected with slag storehouse, and when system reform is again excellent according to lime-ash weigher size
Change system equipment arrangement.Slag storehouse original volume is 195m3, crown circle diameter 8m, the high 13.9m of top platform, slag storehouse after transformation
960mm height is cut down at top, that is, cuts off column part 960mm, and cut-out volume is 50.24m3, residual volume is
144.76m3。
It bypasses upper side and is equipped with observation manhole, prevent lime-ash and blocked in bypass.
Lime-ash weigher is stable after putting into operation, and through calibration, weighing measurement error is less than 1%, weighing measurement work model
Enclose 0-30t/h.
The utility model realizes the measurement of boiler ash discharge capacity in power industry for the first time, has real-time, continuity, standard
True property feature.
The utility model is weighed scheme using physics, and measurement accuracy is protected, maximum error of measuring 1%；
The utility model adapts to the complex work environment of boiler emission lime-ash high temperature, easy airborne dust；
The utility model carries out high temperature-proof design to load cells elements, utmostly reduces ambient enviroment to element
Heat is transmitted, and service life of equipment is improved, and is convenient for element on-bne repair；
The utility model has the function of data real-time display, statistics, analysis, early warning etc., global scope assessment boiler slag removal feelings
Condition, the operation of auxiliary direction safe and economical boiler.
The above descriptions are merely exemplary embodiments of the present utility model, is not limited to the model of the utility model
It encloses.It can be combined with each other under conditions of not conflicting for each component part of the utility model, any those skilled in the art,
Made equivalent variations and modification under the premise of not departing from the design and principle of the utility model, it is new should all to belong to this practicality
The range of type protection.
Claims (9)
1. a kind of power station boiler ash on-line measurement system is used for the measurement of boiler ash discharge capacity, which is characterized in that the electricity
Boiler ash on-line measurement system of standing includes：
Boiler slag well；
Dry slag conveyer；
Dry slag conveyer slag crusher；
Lime-ash weigher；
Slag storehouse；
Wherein, the lime-ash weigher connects slag crusher, and slag crusher connects dry slag conveyer, and dry slag conveyer is conveyed by dry slag
Band connection boiler slag well；
The lime-ash weigher includes：Metal Chain plate scales, are arranged in the shell shell being enclosed in except the metal Chain plate scales
Entrance on body, setting outlet on the housing and the weighing sensor being arranged on the lateral wall of the shell；
The power station boiler ash on-line measurement system further includes：Accident bypass duct is connected to the slag crusher and the slag
Between storehouse, and accident bypass duct is arranged except the shell；
Wherein, metal Chain plate scales described in the housings close, the entrance connect the slag crusher, outlet connection slag storehouse；
The entrance is located at the top of the outlet.
2. power station boiler ash on-line measurement system as described in claim 1, which is characterized in that the weighing sensor passes through
Thermal insulation layer is mounted on the lateral wall of the shell.
3. power station boiler ash on-line measurement system as described in claim 1, which is characterized in that the power station boiler ash exists
Line measuring system further includes：DCS, i.e. scattered control system, the weighing sensor are connect with DCS signals.
4. power station boiler ash on-line measurement system as described in claim 1, which is characterized in that the lime-ash weigher also wraps
It includes：Weigher entrance material blanking tube is arranged in the inlet and connects the slag crusher.
5. power station boiler ash on-line measurement system as described in claim 1, which is characterized in that the lime-ash weigher also wraps
It includes：Weigher exports material blanking tube, is arranged in the exit and connects the slag storehouse.
6. power station boiler ash on-line measurement system as described in claim 1, which is characterized in that the power station boiler ash exists
Line measuring system further includes：Bypath valve on accident bypass duct is set.
7. power station boiler ash on-line measurement system as described in claim 1, which is characterized in that the metal Chain plate scales pass through
Steel band conveys boiler ash, and the steel band is driven by motor, and the motor is arranged except the shell.
8. power station boiler ash on-line measurement system as described in claim 1, which is characterized in that the shell it is lateral on open
Equipped with maintenance window.
9. power station boiler ash on-line measurement system as claimed in claim 8, which is characterized in that the maintenance window with it is described
Weighing sensor is located at the same side of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820017164.9U CN207688146U (en) | 2018-01-05 | 2018-01-05 | Power station boiler ash on-line measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820017164.9U CN207688146U (en) | 2018-01-05 | 2018-01-05 | Power station boiler ash on-line measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207688146U true CN207688146U (en) | 2018-08-03 |
Family
ID=62990974
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820017164.9U Active CN207688146U (en) | 2018-01-05 | 2018-01-05 | Power station boiler ash on-line measurement system |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113884166A (en) * | 2021-08-23 | 2022-01-04 | 苏州西热节能环保技术有限公司 | Method for monitoring slag leakage rate of fire grate |
-
2018
- 2018-01-05 CN CN201820017164.9U patent/CN207688146U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113884166A (en) * | 2021-08-23 | 2022-01-04 | 苏州西热节能环保技术有限公司 | Method for monitoring slag leakage rate of fire grate |
| CN113884166B (en) * | 2021-08-23 | 2024-06-11 | 苏州西热节能环保技术有限公司 | Method for monitoring slag leakage rate of fire grate |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guo Qiang Inventor after: Zhang Longgang Inventor after: Liu Yulong Inventor after: Liu Guixi Inventor after: Li Jihong Inventor after: Hou Jianjun Inventor after: Li Zhenhua Inventor after: Chen Huliang Inventor after: Ji Lite Inventor after: Jin Shengxiang Inventor after: Sui Xiaofeng Inventor after: Li Ransheng Inventor after: Li Qianyu Inventor after: Guo Yangfu Inventor after: Mao Yongqing Inventor after: Fan Xiaoying Inventor after: Meng Dezhong Inventor before: Guo Qiang Inventor before: Zhang Longgang Inventor before: Liu Yulong Inventor before: Liu Guixi Inventor before: Li Jihong Inventor before: Hou Jianjun Inventor before: Li Zhenhua Inventor before: Chen Huliang Inventor before: Ji Lite Inventor before: Jin Shengxiang Inventor before: Sui Xiaofeng Inventor before: Li Ransheng Inventor before: Li Qianyu Inventor before: Guo Yangfu Inventor before: Mao Yongqing Inventor before: Fan Xiaoying Inventor before: Meng Dezhong |
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| CB03 | Change of inventor or designer information |