CN110371680A - A kind of defeated grey on-line measuring device of coal electric force and its logic control power-economizing method - Google Patents
A kind of defeated grey on-line measuring device of coal electric force and its logic control power-economizing method Download PDFInfo
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- CN110371680A CN110371680A CN201910711653.3A CN201910711653A CN110371680A CN 110371680 A CN110371680 A CN 110371680A CN 201910711653 A CN201910711653 A CN 201910711653A CN 110371680 A CN110371680 A CN 110371680A
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- ash
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/36—Arrangements of containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
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- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to industrial dedusting environmental protection applied technical fields, specifically disclose a kind of defeated grey on-line measuring device of coal electric force, by the storehouse pump being connect with ash conveying pipe, and the ash bucket with storehouse pump connection, and the dome valve of storehouse pump and ash bucket interconnecting piece is set, and both ends pump the equalizing main connecting with ash bucket, and the balanced valve being arranged on equalizing main with storehouse respectively, and are separately positioned on storehouse pump, the storehouse pump detection components in ash bucket, ash bucket detection components composition.The beneficial effect of a kind of defeated grey on-line measuring device of coal electric force of the invention and its logic control power-economizing method is: solving the defeated ash of tradition without reliable measurement means, cause compressed air largely to waste, device action frequently and abrasion ash conveying pipe the case where, storehouse pump can work in perfect condition when ensure that defeated ash, working condition of the defeated ash process work in the defeated ash of concentrated phase, substantially reduce the dosage of compressed air, number of equipment action only has pervious 1/40 or so, greatly extends the working life of equipment and ash conveying pipe.
Description
Technical field
The invention belongs to industrial dedusting environmental protection applied technical fields, and in particular to a kind of defeated grey on-line checking dress of coal electric force
It sets and its logic control power-economizing method, energy conservation and control suitable for the industries Pneumatic ash conveying such as mine, electric power, metallurgy, chemical industry.
Background technique
Thermal power plant's Pneumatic ash conveying is an integrated technology, it is related to hydrodynamics, material science, automatic technology, system
Make the fields such as technology, belong to transfer efficiency is high, land occupation less, economic and free of contamination advanced technological hem.In recent years, pneumatic conveying skill
Art is rapidly developed and is applied in every field, especially high concentrated phase (solid gas mixing ratio), low energy consumption, large capacity, long range
New device constantly come out.High concentrated phase, low speed conveying make the energy consumption of pneumatic conveying already close to belt conveyor.Due to tradition
Level meter signal error, this mode of movement is still without forming serious, the valve switch frequency that solves gas consumption waste so far
Too fast, diluted phase transport friction etc. falls behind technology and does not adapt to modern industry power conservation requirement, and theoretical research lags behind reality significantly
Using pump storage ash in solution storehouse, which is concentrated, thus unloads ash, and accurately measuring ash bucket and storehouse stock position with defeated ash time control is that raising is each
The key of manufacturing enterprise's energy-saving and emission-reduction and equipment safety operation.
Traditional ash-transmission system ash bucket ash position height measurement and control；The ash bucket ash position height of dust pelletizing system monitors
The high and low position of ash bucket ash position is recorded, the high low state of operations staff's ash bucket is only reminded, often uses angle-inserting type level switch
It measures, it unloads ash control for system and does not contact directly.Since traditional ash bucket charge level indicator using angle-inserting type due to being installed,
And the coal ash of ash bucket is dusted by the mode of high-pressure electrostatic precipitation, the coal ash that electric precipitation gets off is negatively charged, dedusting cabin
Bulkhead it is positively charged, positive and negative charge mutually adsorbs, and is deposited in negatively charged coal ash slowly on ash bucket inner wall and reaches as high as
1.0 meters of thickness.And the insertion depth of level switch makes switch feeler lever often be embedded in bridging layer and produce also just at 0.5 meter or so
Raw wrong report, so the reason of a lot of ash buckets will configure vibration pump in the design process, original original design intention is by the high low ash position of ash bucket
Switching signal uses the defeated ash of manual emergency, defeated ash at this time when grey position is up to highest point with the chain use of manual dust unloading
Program is directly entered the defeated grey program of manual emergency until grey potential drop makes ash because ash bucket charge level indicator is reported by mistake throughout the year as low as most low ash position
Bucket level-sensing device is almost an ornaments or the reference for being only used as high-order grey position or reminds.The wrong report degree of low level level-sensing device is more tight
Weight, also without preferred solution, so some ash bucket low level level-sensing devices do not design simply.
Therefore, based on the above issues, present invention offer and a kind of defeated grey on-line measuring device of coal electric force and its logic control
Power-economizing method processed.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of defeated grey on-line measuring device of coal electric force and its logic control sections
Energy method is stored coal ash using coal ash under dust removing funnel heat-retaining condition at the not hardened fundamental characteristics of this state (about 152 ° of c)
Grey program is unloaded using the starting of its ash position height when reaching a certain height in ash bucket, on-off times can be greatly saved, is saved
A large amount of defeated ash gas.
Technical solution: an aspect of of the present present invention provides a kind of defeated grey on-line measuring device of coal electric force and (utilizes high temperature ash bucket
Carry out coal ash and store technology), it is pumped by the storehouse being connect with ash conveying pipe, and the ash bucket with storehouse pump connection, and setting is in storehouse pump and ash
The dome valve of bucket interconnecting piece and both ends pump the equalizing main connecting with ash bucket with storehouse respectively, and are arranged in flat on equalizing main
Weigh valve, and is separately positioned on storehouse pump, the storehouse pump detection components in ash bucket, ash bucket detection components composition；The storehouse pumps detection components,
Flange including being mounted on storehouse pump outer wall, and the first pulse cards being mounted on flange, and be located in the pump of storehouse and with the first pulse
Block the storehouse stock level sensor of connection, and the storehouse pump signal line connecting with the first pulse cards, the storehouse of Ji Yucang pump signal line connection
Pump signal controller, wherein dome valve, balanced valve are connect with storehouse pump signal controller respectively；The ash bucket detection components, including
The ash bucket level sensor installation part of ash bucket inner wall, and the ash bucket material position being mounted on dust level sensor installation part are set
Sensor, and the coaxial signal line being connect with ash bucket level sensor, and the mounting flange of ash bucket outer wall is set, and setting exists
The second pulse cards on mounting flange, and the ash bucket signal wire being connect with the second pulse cards, and the ash being connect with ash bucket signal wire
Struggle against signal controller, wherein one end of coaxial signal line is connect with the second pulse cards.
The technical program, the storehouse pump signal controller, ash bucket signal controller are respectively by shell, display screen, operation
Panel, signal transmitting and receiving module, data processing module, warning module composition.
The technical program, the defeated grey on-line measuring device of the coal electric force, further includes pumping the stream being used in combination with storehouse
Change tracheae.
Another aspect of the present invention provides a kind of logic control power-economizing method of the defeated grey on-line measuring device of coal electric force, packet
Following steps are included, step 1 is inputted respectively by storehouse pump signal controller, ash bucket signal controller to position grey in storehouse pump, ash bucket prison
The preset value of control.Step 2, ash bucket signal controller pass through the ash position height in ash bucket level sensor real-time monitoring ash bucket, when
As grey program switch enabling signal is unloaded when ash bucket ash position height reaches set altitude signal, make the defeated ash of dome valve access switch
Program opens dome valve and unloads ash, pump signal controller in storehouse passes through storehouse stock position while unloading ash after dome valve enters defeated grey program
Ash position height in the pump of sensor real-time detection storehouse, when in storehouse, the grey position of pump reaches set value, dome valve, which closes to enter, to be vulcanized, is defeated
Ash, purging program unload grey EP (end of program) when ash bucket ash position height is as low as set lowered height, and closing is unloaded grey program, waited until
It is next to unload grey program arrival.
The technical program, have the function of heat preservation heating using ash bucket, coal ash is carried out in the not hardened characteristic of this state
Coal ash carries out storing concentration in ash bucket and unloads ash, when corresponding electric field ash bucket ash position height reaches setting value in the step 2
When, starting dome valve unloads grey program, when grey program is unloaded in dome valve execution, the grey time is unloaded using the control of storehouse pump signal controller,
Dome valve unloads grey program until the grey potential drop of ash bucket unloads grey program to low spot height completion concentration is arranged.
Compared with prior art, a kind of defeated grey on-line measuring device of coal electric force of the invention and its logic control energy-saving square
The beneficial effect of method is: solving the defeated ash of tradition because defeated ash control flow is a kind of time without reliable measurement means
Control process in proper order, repetition period are generally 100-600 seconds, and defeated daily grey number about 144-288 times, ash bucket lies substantially in nothing
Grey or few grey state, defeated ash process work normally the working condition in the defeated ash of dilute phase, cause compressed air largely to waste, equipment is moved
The case where making frequently and wearing ash conveying pipe utilizes coal ash physical characteristic not hardened under 150 ° of states, ash bucket heat preservation heating
The characteristics of, the operation sequence that the seldom ash quantity of script ash bucket begins to discharge is changed to concentrate storage ash in ash bucket, reaches certain ash
It is concentrated when amount and unloads ash, in ash bucket and storehouse pump level-sensing device is installed respectively and measure ash bucket material position and storehouse stock position simultaneously, in ash bucket material position
Start defeated ash when reaching the upper limit of setting again, ash bucket material position stops defeated ash when dropping to the lower limit of setting, as long as defeated ash daily in this way
3-20 times or so, so that it may reach defeated ash 144-288 times in the past defeated ash quantity, storehouse pump can work in ideal shape when ensure that defeated ash
State, defeated ash process work substantially reduce the dosage of compressed air, number of equipment action only has in the working condition of the defeated ash of concentrated phase
Pervious 1/40 or so, greatly extend the working life of equipment and ash conveying pipe.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the defeated grey on-line measuring device of coal electric force of the invention；
Fig. 2 is a kind of ash bucket Level control flow chart of the defeated grey on-line measuring device of coal electric force of the invention；
Fig. 3 is a kind of blow tank conveying control flow chart of the defeated grey on-line measuring device of coal electric force of the invention；
Fig. 4 is level-sensing device setting height and the practical ash position height comparison diagram of storehouse pump；
Fig. 5 is the curve that ash, ash bucket charge level indicator are stored using ash bucket；
Fig. 6 is that 1000MW unit electric field utilizes the grey 48 hours monitoring figures of ash bucket of the present invention storage；
Fig. 7 is that bis- electric field 500S ash unloading bin of Jiangsu power plant 1000MW pumps the almost nil schematic diagram of each ash quantity.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated.
The defeated grey on-line measuring device of a kind of coal electric force as shown in Figure 1, Figure 2 and Figure 3, by what is connect with ash conveying pipe 1
Storehouse pump 3, and with 3 ash buckets 7 that connects of storehouse pump, and be arranged in storehouse pump 3 and 7 interconnecting piece of ash bucket dome valve 5 and both ends respectively with storehouse
The equalizing main 9 that pump 3 is connect with ash bucket 7, and the balanced valve 6 being arranged on equalizing main 9, and be separately positioned on storehouse and pump 3, ash bucket
Storehouse pump detection components in 7, ash bucket detection components composition；The storehouse pumps detection components, and the flange of 3 outer walls is pumped including being mounted on storehouse
14, and the first pulse cards 15 being mounted on flange 14, and the storehouse stock position connecting in 3 and with the first pulse cards 15 is pumped positioned at storehouse
Sensor 4, and the storehouse pump signal line 12 being connect with the first pulse cards 15, the storehouse pump signal control that Ji Yucang pump signal line 12 connects
Device 13, wherein dome valve 5, balanced valve 6 are connect with storehouse pump signal controller 13 respectively；The ash bucket detection components, including setting
In the ash bucket level sensor installation part 16 of 7 inner wall of ash bucket, and the ash bucket material being mounted on dust level sensor installation part 16
Level sensor 8, and the coaxial signal line 17 being connect with ash bucket level sensor 8, and the mounting flange of 7 outer wall of ash bucket is set
18, and the second pulse cards 19 being arranged on mounting flange 18, and the ash bucket signal wire 10 being connect with the second pulse cards 19, and with
The ash bucket signal controller 11 that ash bucket signal wire 10 connects, wherein one end of coaxial signal line 17 is connect with the second pulse cards 19.
It is further preferred that the storehouse pump signal controller 13, ash bucket signal controller 11 respectively by shell, display screen,
Operation panel, signal transmitting and receiving module, data processing module, warning module composition, wherein storehouse pump signal controller 13, ash bucket letter
The display screen of number controller 11, real-time display parameter make ash according to the variation of each storehouse pump, each ash bucket ash position signal
Position change curve simultaneously shows record, and operator is made to grasp the grey position change procedure of each storehouse pump, each ash bucket at any time, from
Dome valve abrasion and the gas leakage, defeated ash in each storehouse pump, each ash bucket operating status and system are judged in curve graph
The operating conditions such as valve, balanced valve, ash bucket hanging, ash conveying pipe abrasion；And the defeated grey on-line measuring device of coal electric force, also wrap
It includes the fluidisation tracheae 2 being used in combination with storehouse pump 3 and realizes that the ash pumped in 3 to storehouse carries out vulcanizing treatment.
A kind of logic control power-economizing method of the defeated grey on-line measuring device of coal electric force of the invention, includes the following steps,
Step 1 is inputted respectively by storehouse pump signal controller 13, ash bucket signal controller 11 to position grey in storehouse pump 3, ash bucket 7 monitoring
Preset value.Step 2, ash bucket signal controller 11 pass through the ash position height in 8 real-time monitoring ash bucket 7 of ash bucket level sensor, when
As grey program switch enabling signal is unloaded when 7 ash position height of ash bucket reaches set altitude signal, keep dome valve access switch defeated
Grey program opens dome valve 5 and unloads ash, storehouse pump signal controller 13 passes through storehouse while unloading ash after dome valve enters defeated grey program
Ash position height in 4 real-time detection storehouse of stock level sensor pump 3 (it is big to depend on unit when the grey position of pump 3 reaches set value in storehouse
It is small), dome valve 5, which is closed, to be unloaded into vulcanization, defeated ash, purging program when 7 ash position height of ash bucket is as low as set lowered height
Grey program is unloaded in grey EP (end of program), closing, unloads grey program arrival until next.
It is further preferred that having the function of heat preservation heating using ash bucket 7, coal ash is carried out in the not hardened characteristic of this state
Coal ash carries out storing concentration in ash bucket and unloads ash, when corresponding 7 ash position height of electric field ash bucket reaches setting value in the step 2
When, starting dome valve unloads grey program, when grey program is unloaded in the execution of dome valve 5, when unloading ash using the control of storehouse pump signal controller 13
Between, dome valve unloads grey program until the grey potential drop of ash bucket 7 unloads grey program to low spot height completion concentration is arranged.
As shown in figure 4, the present invention pumps ash position height curve using ash bucket ash position height curve and storehouse, it can accurately reflect ash
Bucket meter storehouse pumps safe operation state, spy substantially creatively not hardened in this state using coal ash under dust removing funnel heat-retaining condition
Property, concentration stores up ash under dust removing funnel heat-retaining condition and concentration unloads the technologies such as ash, and ash bucket, the interior material of storehouse pump are solved from technological means
High temperature, temperature drift, friction, bridging wrong report, the interference of suspension powder, rapid blanking and air pressure impact, ashes electrostatic interference, coal product become
Change etc. many disturbing factors, it is subversive using the ash position height of dust removing funnel as start dome threshold switch startup program for the first time,
Recycle the coal ash height control dome valve in the pump of storehouse unloads the grey time, in the process of running, different according to unit and ash bucket, if
Ash bucket coal ash height is set, when corresponding electric field height reaches setting value, starting dome valve unloads grey program, executes in dome valve
When unloading grey program, grey position signal control being pumped using storehouse and is unloaded the grey time, dome valve unloads grey program until the grey potential drop of ash bucket is extremely arranged
Low spot height, which is completed to concentrate, unloads grey program.
As shown in figure 5, the present invention changes and relies only on the operating mode of switch dome valve of time priority originally (original unloads ash
No matter ash bucket is whether there is or not dust stratification for feature, and storehouse pump all instruct whether there is or not coal ash program and allows dome valve to carry out switch the programs such as to unload ash, convey, this
Sample causes to waste a large amount of gas source), especially in electric power pneumatic ash transmitting system compared with original system economize on electricity up to 70% or more, not only such as
This, in gas consumption, valve service life, pipe wear, the service life of air compressor machine, the recirculated cooling water of air compressor machine, equipment peace
Row for the national games, the operating cost of Spare Parts and service life etc. have promotion.
As shown in fig. 6, certain power plant 1000MW unit former two electric fields 48 hours defeated grey 345 times, creative is stored using ash bucket
After 48 hours, blow tank conveying only has 5 times and does not just have ash ash, greatlys save the energy and on-off times.
The invention has the following advantages that 1, that the defeated ash of tradition with time priority is changed to grey position is preferential, with ash bucket ash position signal
Preferentially, time dual fail-safe mode of guaranteeing the minimum controls and unloads ash starting bolt down procedure, pumps grey position signal priority with storehouse, and the time guarantees the minimum dual fail-safe
Mode controls dome valve and unloads grey time and unloading ash capacity；2, signal is provided by dedusting ash bucket energy conservation detection control instrument, makes dome valve
Into unloading grey program；3, storehouse pumps grey position detection control instrument offer storehouse pump ash position height signal as dome valve and unloads grey time control
Program；4, using ash bucket insulation of equipment and heating, according to coal ash, not hardened characteristic carries out storing ash under 150 degree of states.
Embodiment one
The dedusting ash bucket quantity of coal electricity be depending on unit load size, for ultra-clean emission request, most of dedusting ash
Bucket has an electric field, two electric fields, three electric fields, four electric fields, five electric fields, and the ash disposal ash quantity of each electric field also varies considerably.Specially one
Electric field about accounts for about 0.46% in 80%, two electric fields about 16%, three electric fields about 2.8%, four electric fields about 0.64%, five electric fields except ash quantity；For
Each electric field except ash quantity difference, defeated ash cellar pump size and unload the grey time and have corresponding difference.General dedusting ash bucket
Configuration is: each electric field of 1000MW has 12 ash bucket meters 60, and corresponding storehouse pump is 24 (one or two electric fields have storehouse pump) 660/
The each electric field of 600MW has 8 ash bucket meters 40, and for corresponding storehouse pump at 16,330MW/300MW is total 24 ash buckets, phase
Corresponding storehouse pump at 8, here can according to each power plant using the ash of coal the difference in ash bucket quantity；
The present invention carries out unloading grey program setting from the ash bucket of an electric field, and when ash bucket ash position height reaches 1.6 meters, grey journey is unloaded in starting
Sequence closes when grey position is as low as 0.5 meter and unloads grey program, (since an electric field ash quantity accounts for about 80% or so, pushed away according to load and ash
Calculate interval time program loop about 3000S-8000S) grey program operation is unloaded with the control of ash bucket ash position height, ash position height is pumped with storehouse
Control dome valve unloads grey time and unloading ash capacity；
The ash bucket programs of two electric fields runs setting, and when ash bucket ash position height reaches 2.0 meters, grey program is unloaded in starting, when grey position as low as
Closing is unloaded grey program and (since an electric field ash quantity accounts for about 16% or so, is separated by according to load and ash estimation program period at 0.5 meter
About 32-48 hours time), grey program operation is unloaded with the control of ash bucket ash position height, ash is unloaded with storehouse pump ash position height control dome valve
Time and unloading ash capacity；
The ash bucket programs of three electric fields runs setting, and when ash bucket ash position height reaches 2.0 meters, grey program is unloaded in starting, when grey position as low as
Closing is unloaded grey program and (since an electric field ash quantity accounts for about 2.8% or so, is separated by according to load and ash estimation program period at 0.5 meter
About 48-72 hours time), grey program operation is unloaded with the control of ash bucket ash position height；
Four, the ash bucket program of five electric fields runs setting, and when ash bucket ash position height reaches 1.0 meters, grey program is unloaded in starting, when grey position
Grey program is unloaded (since an electric field ash quantity accounts for about 0.64% or so, according to load and ash estimation program week as low as closing at 0.5 meter
Phase interval time about 72-100 hours), grey program operation is unloaded with the control of ash bucket ash position height；
In PLC system picture do configuration with ash bucket ash position signal to supervise ash bucket safe operation, when dome threshold switch five times and
When ash bucket ash position height does not change, illustrate that ash bucket has generated hanging, ash bucket ash does not enter into storehouse pump, and system interface generates at this time
Alarm；When pump ash position height curve in storehouse is in high-order or low level without changing to dome threshold switch always three times, illustrate that storehouse pumps coal ash
It does not transfer out or ash bucket coal ash is not unloaded down, system interface is alarmed at this time, and corresponding ash bucket is taken in notice operation
Investigation measure, nips in the bud accident.
Former storehouse pump ash position height is measured and is utilized, the grey position measurement in the pump of ash-transmission system important link storehouse, in original design intention
By the grey position measurement of storehouse pump using top charging bit switch, interlocking signal is issued when grey position contact-making switch and is unloaded to control dome valve
Ash.At present level-sensing device used in common ash disposal system include tuning fork, it is ultrasonic wave, radio frequency admittance, radar, capacitor, passive
The forms such as nucleon, generally using non-contact or plug-type mounting means, level-sensing device probe needs to directly contact coal ash, because of coal
Ash is the mixture of granular material and solid material, and cohesiveness is stronger, and mobility is poor, so being often attached to level-sensing device biography
On sensor, information is caused to be reported by mistake, can not participate in control and it is chain；If measured using passive nucleon, establish when measuring in coal
Ash hopper ash position height is calculated on the basis of grey activity degree, in practical applications, since coal coal product constantly change and is made
Activity degree at hundred times change, along with run due to equipment load variations, coal product ash fluctuation directly affect storehouse pump
Ash quantity variation, cause same load difference coal product and with coal ash caused by coal product different load it is all different.Especially ash bucket
When ash quantity overstocks excessive or very few, the ash quantity that same time unloads ash to storehouse pump has very big difference.Therefore people are for equipment fortune
Row safety, it has to grey mode is unloaded using time priority, i.e., no matter ash bucket ash quantity how much, storehouse pump only according to set time into
Row unloads ash, that is, ash bucket charge level indicator only carries out grey position reminding task task, and storehouse pump level-sensing device is an ornaments, directly by setting
The fixed time carries out unloading ash, greatly wastes gas source and the energy in this way, so a lot of electric field storehouse pump level-sensing devices are only furnished, even
In no level-sensing device.
In terms of the old-fashioned storehouse pump using effect of tradition, a lot of power plant, metallurgy industry storehouse are pumped since level-sensing device is not handy, defeated ash system
System mostly uses time control greatly, and since ash bucket blanking velocity is unstable, from safety considerations, the time is all arranged to compare guarantor
It keeps, as a result results in the ash of each storehouse pump conveying seldom, the compressed air used up is very much.When ash bucket ash quantity is bigger,
It is larger that ash is unloaded in the same time, is even resulted in and is bought securities with all one's capital and cannot be introduced into vulcanization program, so that conveying is formed plugging and is caused in ash bucket greatly
Measure dust stratification, another side effect be due to the time setting it is shorter, make conveying ash quantity it is seldom, formed the defeated ash of dilute phase, increase
The air consumption of conveying ash per ton, increases the abrasion to removing ash pipeline, valve, when feed time sets too long, and has little time
Ash discharge causes a large amount of dust stratifications in ash bucket, causes security risk.
Due to controlling storehouse pump work using the time, operating frequency is very high in the pump work of storehouse, internal work bad environments,
Level-sensing device is easy to damage, leads to wrong report and failure.So that Level control is difficult to really be used in operation, storehouse pump charging
What control was substantially carried out according to time control model.Since operation considers from security standpoint and not stifled grey angle, storehouse pump into
The material time was controlled in the very short time, and storehouse pump inlet amount depends primarily on ash quantity in ash bucket above, and ash quantity is big, and more than 10 seconds
Will full pumping, and when seldom without ash or ash quantity in ash bucket, causing the full pumping time, long (half an hour can not may also reach
To the pump of one third), so as to cause in multiple circulation, storehouse pump causes big in the defeated grey state of the even empty pump of very low amount
Losses of compressed air is measured, energy waste is serious, simultaneously because time control room is every smaller, storehouse pump minute quantity coal ash or the empty defeated ash of pump
65% or more of entire defeated grey number is accounted for, system acting frequency is high, the peripheral equipments quick abrasion such as inlet valve, defeated when ash quantity is few
Ash system is in the defeated grey state of dilute phase, and ash conveying pipe abrasion is big, is also easy to the generation for causing pipeline to block up ash.
The defeated grey time control logic operation of tradition, in the actual condition of electric precipitation and ash-transmission system, due to unit load
Unstable and coal dust burdening the difference of operation, the grey quantity variance of ash bucket decline is very big, existing defeated grey control logic,
When ash quantity is big, system response does not come, and when ash quantity very little, system resource waste is serious,
By the analysis of upper face data, it may be seen that original ash-transmission system is in the control logic based on " time control "
Under, the actual state of ash bucket, blow tank conveying, under the mode of use " time control ": falling ash quantity difference every time very in the pump of storehouse
Greatly.It may know that according to field observation and analysis, the amount of storehouse pump charging depends primarily on the amount of dry ash in the ash bucket of top.When in ash bucket
When ash material is more, storehouse pump charging is substantially full pumping, and when expecting seldom in ash bucket, storehouse pumps interior charging seldom, even in empty
Pump operation.From the point of view of the case where actual tests, in 24 hours, it is more than 90% that storehouse pump, which is especially the later several electric fields of two electric fields,
Above time is in the defeated grey operating status of empty pump.Under current time control model, electric field storehouse pump had more than for 60% time
It is run under the inefficient state that consumes energy, wastes a large amount of compressed air and the energy, while input and output material valve is also in no ash shape
Frequent movement is gone back under state, compressed air consumption is higher, and the mechanical wear of equipment is big, reduces service life, increases equipment
Maintenance.
Improved effect A:
State's electricity certain power plant 660MW unit carries out defeated ash by pumping the technology that ash is unloaded in grey position control to an electric field storehouse, in terms of energy conservation
Detailed comparisons have been, pocket watch comparison is carried out to original system and improved system, as a result, it has been found that electric field transformation front and back power saving rate
Up to 22% or more；
Two electric field storehouses pump the technology that ash is unloaded in grey position control and carry out defeated ash, since the ash quantity of two electric fields only has 16%, if according to an electricity
The defeated grey mode of field will will lead to gas source waste, and the defeated ash of dilute phase is formed, and analyze in the defeated ash device structure of dedusting above, each
Dedusting ash bucket is with heating insulation layer, it is necessary to assure ash bucket guarantees that temperature at 152 °C or more, can just make to rest on ash bucket
The characteristics of coal ash is not hardened, and the structure of storehouse pump is without insulating layer, coal ash be when the residence time is too long under low-temperature condition these
It is hardened that ashes is easily formed when ashes cannot get heating and thermal insulation, if we emphasize energy conservation simply, the coal ash of ash bucket is passed through dome
Valve is opened for a long time, and the grey position that storehouse pumps is risen to a certain height set, and storehouse pumps no insulating layer, this is bound to cause entrance
Storehouse pump coal ash due to storehouse pump in overlong time and cannot get heating and thermal insulation cause coal ash be subcooled to be formed it is hardened；
The present invention holds on to that ashes low temperature is easy to harden, high temperature feature easy to maintain, and subversive handle is energy conservation and unloads the pump that puts in storage
The ashes concentration stored stores in the ash bucket with heating and thermal insulation, and starting when gathering certain altitude ash quantity is waited to unload ash and defeated ash
Program；
Specific method: continuous measurement level-sensing device is installed among ash bucket bracket and is inquired into, (about 48 is small when ashes gathers 2.0 meters
When) when ash bucket charge level indicator issue startup program signal to dome valve, allow dome valve to enter starting and unload grey program, dome valve unloads ash and opens
Closing the time is that the ash position height signal that detected according to the continuous material level meter being mounted on the pump of storehouse is controlled, when grey in ash bucket
When potential drop is as low as 0.5 meter of height of low level setting, grey program is unloaded in closing, unloads grey program unlatching until next；
It is learnt according to field test, carried out concentrating after ash quantity at ash bucket accumulation 48 hours and unload the defeated ash of ash, original unloads grey number in 48 hours
It up to 345 times, is concentrated after transformation when unloading ash and only unloading ash 5 times, ash bucket instrument show 0.5 meter, stops unloading the next but ones such as grey program
Store ash.
Improved effect B:
1, certain electric power plant, state, which pumps the ash bucket of an electric field, storehouse, carries out grey position detection and unloads grey program setting, when ash bucket ash position height
Grey program is unloaded in starting when reaching 1.6 meters, is closed when grey position is as low as 0.5 meter and is unloaded grey program, (since an electric field ash quantity accounts for about 80%
Left and right, according to load and ash estimation program period interval time about 3000S-8000S), ash position height is pumped as dome using storehouse
Valve unloads grey time and ash content control, (original dome valve 100S is unloaded the storehouse pump ash position height control of grey time, the time, which guarantees the minimum, to be set
It is set to 6000S) grey program operation is unloaded with the control of ash bucket ash position height, the grey time is unloaded with storehouse pump ash position height control dome valve and is unloaded
Ash quantity sees power saving rate in 22%-30% or so from the metering of practical pocket watch.
2, it is 200S that two electric fields of Jiangsu power plant 1000MW, which unload the grey time, and vulcanization, conveying, purging program are 300S, complete
At one cycle used time 500S, each ash quantity of 500S ash unloading bin pump as shown in Figure 7 is almost nil, switchs dome valve number altogether and is
The defeated grey method of ash is unloaded according to chain control above and below neoteric ash bucket and storehouse pump ash position height in 48*60*60/500=345 time,
It being changed to high temperature ash bucket and stores ash, concentration unloads ash, and 48 hours ash buckets store ash bucket ash position signal enabling after about 2.0 meters of ash and unload grey program, and 48
Hour stored ash quantity is no grey as long as unloading in grey No. 5 ash buckets, wherein power saving rate are as follows: (345-5)/345=98.5%；
Specific method: continuous measurement level-sensing device is installed among ash bucket bracket and is inquired into, (about 48 is small when ashes gathers 1.5 meters
When) when ash bucket charge level indicator issue startup program signal to dome valve, allow dome valve to enter starting and unload grey program, dome valve unloads ash and opens
Closing time-program(me) is that the ash position height signal that detected according to the continuous material level meter being mounted on the pump of storehouse is controlled, and works as ash bucket
When height is arranged as low as low level in interior ash potential drop, grey program is unloaded in closing, unloads grey program unlatching until next；
It is learnt from being analyzed above, three electric field ash bucket dedusting ash quantity only have the 2.8% of total ash quantity, and traditional ash bucket unloads ash toward what storehouse pumped
Time is 400S, and vulcanization, conveying, purge time 200S, a defeated grey circulation time is 600S, if calculated by 72 hours defeated
Grey number: 72*60*60/600=432 time；
Since three electric fields do not have storehouse pump, ash bucket ash is directly discharged to ash conveying pipe conveying by ash bucket, and three electric fields unload ash according to the present invention
Control program directly unloads the defeated grey method of ash by ash bucket ash position height chain control, be described above in mention, using ash bucket 7 into
It carries out storing coal ash under the row condition of high temperature, continuous measurement level-sensing device is installed among ash bucket bracket and is inquired into, when ashes gathers 1
Ash bucket charge level indicator issues startup program signal to dome valve when rice (about 72 hours), allows dome valve to enter starting and unloads the defeated grey journey of ash
Sequence, dome valve are unloaded grey switch time program and are controlled with most fast time design 30S, when potential drop grey in ash bucket is arranged as low as low level
At highly 0.5 meter, grey program is unloaded in closing, unloads grey program unlatching until next；
It unloads altogether within 72 hours just without grey in grey No. 6 ash buckets, wherein power saving rate are as follows: (432-4)/432=99%.
3, Jiangsu power plant 600MW unit economizer hopper, storehouse pump that grey position detection and ash bucket, storehouse pump signal be chain and logic
Control, accounts for about 5% since the coal ash ash quantity of economizer accounts for, coal ash temperature is up to 400 ° or so, therefore in logic control and detector
It requires to carry out high-temperature process on the sensor of table, to meet high temperature testing requirements；
We continuously measure level signals using ash bucket first, the ash bucket when ash bucket ashes gathers 2 meters (about 30-48 hours)
Level-sensing device issues startup program signal to dome valve, allows dome valve to enter starting and unloads grey program, dome valve unloads grey switch time journey
Sequence is that the ash position height signal that detected according to the continuous material level meter being mounted on the pump of storehouse is controlled, when potential drop grey in ash bucket
When as low as 0.5 meter of height of low level setting, grey program is unloaded in closing, unloads grey program unlatching until next；
It is learnt from being analyzed above, economizer hopper dedusting ash quantity only has 5%, and traditional ash bucket unloads the grey time toward what storehouse pump as 400S,
Vulcanization, conveying, purge time 200S, a defeated grey circulation time is 600S, if calculating defeated grey number: 48* by 48 hours
60*60/600=288 time；
Ash bucket ash position height chain control according to the present invention unloads the defeated grey method of ash, carries out unloading ash to Jiangsu 600MW unit
Test discovery, field test are learnt, are carried out concentrating after ash quantity at ash bucket accumulation 48 hours and are unloaded the defeated ash of ash, original unloads grey number in 48 hours
It up to 345 times, is concentrated after transformation when unloading ash and only unloading ash 5 times, ash bucket instrument show 0.5 meter, and it is next that grey program waiting is unloaded in stopping
Store ash, power saving rate are as follows: (288-5)/288=98%.
It can be obtained from above each electric field actual experiment data analysis result, the variation of removal unit load, coal product the ash content of coal
And from the point of view of the composite factors such as difference of coal product quality, it is more normal that average aggregate power saving rate is maintained at 70% or so.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
It for member, without departing from the principle of the present invention, can also make several improvements, these improvement also should be regarded as of the invention
Protection scope.
Claims (5)
1. a kind of defeated grey on-line measuring device of coal electric force, it is characterised in that: (3) are pumped by the storehouse connecting with ash conveying pipe (1), and
With storehouse pump (3) ash bucket (7) that connect, and setting storehouse pump (3) and ash bucket (7) interconnecting piece dome valve (5) and both ends respectively with
The equalizing main (9) that storehouse pump (3) is connect with ash bucket (7), and the balanced valve (6) being arranged on equalizing main (9), and be respectively set
Storehouse pump detection components in storehouse pump (3), ash bucket (7), ash bucket detection components composition；The storehouse pumps detection components, including installation
In the flange (14) of storehouse pump (3) outer wall, and the first pulse cards (15) being mounted on flange (14), and be located in storehouse pump (3) and
The storehouse stock level sensor (4) being connect with the first pulse cards (15), and the storehouse pump signal line being connect with the first pulse cards (15)
(12), the storehouse pump signal controller (13) of Ji Yucang pump signal line (12) connection, wherein dome valve (5), balanced valve (6) are respectively
It is connect with storehouse pump signal controller (13)；The ash bucket detection components, including the ash bucket material position sensing in ash bucket (7) inner wall is arranged
Device installation part (16), and the ash bucket level sensor (8) being mounted on dust level sensor installation part (16), and with ash bucket material
The coaxial signal line (17) of level sensor (8) connection, and the mounting flange (18) in ash bucket (7) outer wall is set, and setting is solid
Determine the second pulse cards (19) on flange (18), and the ash bucket signal wire (10) connecting with the second pulse cards (19), and and ash bucket
The ash bucket signal controller (11) of signal wire (10) connection, wherein one end and the second pulse cards (19) of coaxial signal line (17)
Connection.
2. a kind of defeated grey on-line measuring device of coal electric force according to claim 1, it is characterised in that: the storehouse pump signal
Controller (13), ash bucket signal controller (11) are respectively by shell, display screen, operation panel, signal transmitting and receiving module, data processing
Module, warning module composition.
3. a kind of defeated grey on-line measuring device of coal electric force according to claim 1, it is characterised in that: the coal electric force
Defeated ash on-line measuring device, further includes the fluidisation tracheae (2) being used in combination with storehouse pump (3).
4. a kind of logic energy-saving control method of the defeated grey on-line measuring device of coal electric force according to claim 1, special
Sign is: includes the following steps,
Step 1 is inputted respectively by storehouse pump signal controller (13), ash bucket signal controller (11) to storehouse pump (3), ash bucket (7)
The preset value of interior ash position monitoring；
Step 2, ash bucket signal controller (11) pass through the ash position height in ash bucket level sensor (8) real-time monitoring ash bucket (7),
When ash bucket (7) ash position height reaches set altitude signal as grey program switch enabling signal is unloaded, enters dome valve and open
It closes defeated grey program to open dome valve (5) after dome valve enters defeated grey program and unload ash, pump signal controller in storehouse while unloading ash
(13) ash position height inner by storehouse stock level sensor (4) real-time detection storehouse pump (3) reaches set in the grey position of storehouse pump (3)
When value, dome valve (5), which is closed, enters vulcanization, defeated ash, purging program, when ash bucket (7) ash position height is as low as set lowered height
When, grey EP (end of program) is unloaded, grey program is unloaded in closing, unloads grey program arrival until next.
5. a kind of logic energy-saving control method of the defeated grey on-line measuring device of coal electric force according to claim 4, special
Sign is: having the function of heat preservation heating using ash bucket (7), coal ash carries out coal ash in ash bucket in the not hardened characteristic of this state
Store concentration and unloads ash, in the step 2 when corresponding electric field ash bucket (7) ash position height reaches setting value, starting circle
Overhead-valve unloads grey program, when dome valve (5) execute and unload grey program, is unloaded the grey time using storehouse pump signal controller (13) control, circle
Overhead-valve unloads grey program until the grey potential drop of ash bucket (7) unloads grey program to low spot height completion concentration is arranged.
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| CN111470285A (en) * | 2020-04-07 | 2020-07-31 | 山东省冶金设计院股份有限公司 | Sealed high-temperature ash discharging device for gas system |
| CN112029951A (en) * | 2020-08-12 | 2020-12-04 | 北京首钢自动化信息技术有限公司 | Coarse ash conveying control method and device |
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| CN113148663A (en) * | 2021-04-21 | 2021-07-23 | 西安热工研究院有限公司 | Energy-saving ash falling time controller suitable for ash conveying system bin pump |
| CN115303804A (en) * | 2022-08-03 | 2022-11-08 | 河北邯峰发电有限责任公司 | Intelligent bin pump with automatic ash discharging function |
| CN115849012A (en) * | 2022-11-18 | 2023-03-28 | 中冶南方(湖南)工程技术有限公司 | Coke powder pneumatic conveying method and system |
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