CN106391310A - Control method and device for alkaline substance supply of wet type dust collector - Google Patents
Control method and device for alkaline substance supply of wet type dust collector Download PDFInfo
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- CN106391310A CN106391310A CN201610471034.8A CN201610471034A CN106391310A CN 106391310 A CN106391310 A CN 106391310A CN 201610471034 A CN201610471034 A CN 201610471034A CN 106391310 A CN106391310 A CN 106391310A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000000428 dust Substances 0.000 title abstract description 10
- 239000000126 substance Substances 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 164
- 239000003513 alkali Substances 0.000 claims abstract description 66
- 230000004087 circulation Effects 0.000 claims description 47
- 230000008859 change Effects 0.000 claims description 21
- 230000009467 reduction Effects 0.000 claims description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 6
- 240000002853 Nelumbo nucifera Species 0.000 claims description 3
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 3
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 230000001276 controlling effect Effects 0.000 description 7
- 238000005457 optimization Methods 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 244000131316 Panax pseudoginseng Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/16—Plant or installations having external electricity supply wet type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention relates to the field of control, and provides a control method and device for alkaline substance supply of a wet type dust collector. The control method comprises the steps that the load signal variation of a unit during the preset time period is determined; the PH value of circulating water and/or the PH value of discharged water are detected; and an alkali metering pump is controlled to run according to the preset value on the basis of the load signal variation, the PH value of circulating water and/or the PH value of discharged water. The PH value of discharged water and/or the PH value of circulating water can be timely and quickly adjusted and kept within the relatively small range, the corrosion of the dust collector is reduced, and sustainable operation of the dust collector is facilitated.
Description
Technical field
A kind of the present invention relates to control field, in particular it relates to the control of wet scrubber basic species supply
Method and control device.
Background technology
The main operational principle of wet cottrell is：Water smoke is sprayed to discharge electrode and corona zone, water smoke
Charged rear division in the powerful corona field that arista electrode is formed is atomized further, electric field force, charged water
The impact interception of mist, absorption coalescence play trapping effect jointly to powder dust particle, and final powder dust particle is in electricity
Reach dust collecting electrode under the driving of field force and be captured.Water forms continuous moisture film in dust collecting electrode, will capture
Dust be washed in ash bucket and with water discharge.
Can add in wet scrubber circulated sprinkling water in the NaOH aqueous solution and the deduster of concentration 32%
The sour gas neutralization reaction in portion, the water after neutralization enters sea.Thus in order to coordinate said process, wet
Formula deduster is commonly equipped with alkali measuring pump, by the operation of alkali measuring pump realize draining PH control with
Recirculated water PH controls.And in the prior art, there is fluctuation width in draining pH value and circulating water PH value
Spend big and response lag shortcoming, easily equipment is caused to corrode, thus the sustainable operation to equipment
There is certain infringement, reduce the service life of equipment.
Content of the invention
It is an object of the invention to provide a kind of control method of wet scrubber basic species supply and control dress
Put, the control method of this wet scrubber basic species supply and control device can make draining pH value and follow
Ring water ph value is maintained in relatively small scope, reduces the corrosion to deduster, is conducive to it can
Continuous service.
To achieve these goals, the present invention provides a kind of controlling party of wet scrubber basic species supply
Method, described control method includes：Determine the load signal variable quantity in the unit scheduled time；Detection circulation
The pH value of water and/or the pH value of draining；And according to described load signal variable quantity and described recirculated water
PH value and/or described draining pH value, control described alkali measuring pump according to preset value run.
Preferably, described preset value includes the first preset value and the second preset value；Described load signal change
Amount includes the first default variable quantity and the second default variable quantity；Load increase and described recirculated water PH
Value is less than the feelings of the first draining preset value less than the pH value of first circulation water preset value and/or described draining
Under condition, described control method includes one of following：If the absolute value of described load signal variable quantity
Preset variable quantity more than or equal to first, then control described alkali measuring pump to run according to the first preset value；With
And if the absolute value of described load signal variable quantity is more than or equal to the second default variable quantity, then control institute
State alkali measuring pump to run according to the second preset value, wherein, the described first default variable quantity is less than described second
Default variable quantity, described first preset value is less than described second preset value.
Preferably, described load signal variable quantity also includes the 3rd default variable quantity；Feelings in load reduction
Under condition, if the absolute value of described load signal variable quantity is more than the 3rd default variable quantity and described recirculated water
PH value be less than or equal to the pH value of second circulation water preset value and/or described draining and be less than or equal to the
In the case of two draining preset values, described alkali measuring pump is controlled to run according to described first preset value, wherein
Described second circulation water preset value is more than described first circulation water preset value, and described second draining preset value is little
In described first draining preset value.
Preferably, the absolute value increasing described load signal variable quantity in load is less than the described first default change
In the case of change amount, in load reduction and described load signal variable quantity absolute value be less than the described 3rd pre-
If in the case of variable quantity and load constant in the case of, described control method includes one of following：
If the pH value of described recirculated water is more than or equal to described first circulation water preset value and/or described draining
PH value be more than or equal to described first draining preset value, control described alkali measuring pump to stop；If institute
The pH value stating recirculated water is less than or equal to the pH value of described second circulation water preset value and/or described draining
Less than or equal to described second draining preset value, control described alkali measuring pump according to described second preset value fortune
OK；And if the pH value of described recirculated water is less than or equal to the 3rd recirculated water preset value and more than described
The pH value of second circulation water preset value and/or described draining is less than or equal to the 3rd draining preset value and big
In described second draining preset value, described alkali measuring pump is controlled to run according to the first preset value, wherein said
3rd recirculated water preset value is less than described second circulation water preset value, and described 3rd draining preset value is less than institute
State the second draining preset value.
Preferably, described load signal variable quantity is the difference or described of assumed load value and current loads value
The flue gas flow change of unit.
Correspondingly, the present invention also provides a kind of control device of wet scrubber basic species supply, described control
Device processed includes：Determining module, for determining the load signal variable quantity in the unit scheduled time；Detection
Module, for detecting the pH value of recirculated water and/or the pH value of draining；And processing module, according to institute
State load signal variable quantity and the pH value of described recirculated water and/or the pH value of described draining, control described
Alkali measuring pump runs according to preset value.
Preferably, described preset value includes the first preset value and the second preset value；Described load signal change
Amount includes the first default variable quantity and the second default variable quantity；Load increase and described recirculated water PH
Value is less than the feelings of the first draining preset value less than the pH value of first circulation water preset value and/or described draining
Under condition, described processing module is used for executing one of following：If described load signal variable quantity is exhausted
More than or equal to first, variable quantity is preset to value, then controls described alkali measuring pump to transport according to the first preset value
OK；And if the absolute value of described load signal variable quantity is more than or equal to the second default variable quantity, then
Described alkali measuring pump is controlled to run according to the second preset value, wherein, the described first default variable quantity is less than institute
State the second default variable quantity, described first preset value is less than described second preset value.
Preferably, described load signal variable quantity also includes the 3rd default variable quantity；Feelings in load reduction
Under condition, if the absolute value of described load signal variable quantity is more than the 3rd default variable quantity and described recirculated water
PH value be less than or equal to the pH value of second circulation water preset value and/or described draining and be less than or equal to the
In the case of two draining preset values, described processing module is used for controlling described alkali measuring pump according to described first
Preset value runs, and wherein said second circulation water preset value is more than described first circulation water preset value, described
Second draining preset value is less than described first draining preset value.
Preferably, the absolute value increasing described load signal variable quantity in load is less than the described first default change
In the case of change amount, in load reduction and described load signal variable quantity absolute value be less than the described 3rd pre-
If in the case of variable quantity and load constant in the case of, described processing module be used for execute following in one
Person：If the pH value of described recirculated water is more than or equal to described first circulation water preset value and/or described row
The pH value of water is more than or equal to described first draining preset value, controls described alkali measuring pump to stop；If
The pH value of described recirculated water is less than or equal to the PH of described second circulation water preset value and/or described draining
Value is less than or equal to described second draining preset value, controls described alkali measuring pump according to described second preset value
Run；And if the pH value of described recirculated water is less than or equal to the 3rd recirculated water preset value and is more than institute
State second circulation water preset value and/or described draining pH value be less than or equal to the 3rd draining preset value and
More than described second draining preset value, described alkali measuring pump is controlled to run according to described first preset value, its
Described in the 3rd recirculated water preset value be less than described second circulation water preset value, described 3rd draining preset value
Less than described second draining preset value.
Preferably, described load signal variable quantity is the difference or described of assumed load value and current loads value
The flue gas flow change of unit.
By technique scheme, the pH value according to described load signal variable quantity and described recirculated water and
/ or described draining pH value, to control described alkali measuring pump according to preset value run.So can be timely
Rapidly adjust draining pH value and circulating water PH value and keep it in relatively small scope, fall
The low corrosion to deduster, is conducive to its sustainable operation.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of specification, with
Detailed description below is used for explaining the present invention together, but is not construed as limiting the invention.?
In accompanying drawing：
Fig. 1 is the flow chart of the control method of the wet scrubber basic species supply being provided according to the present invention；
Fig. 2 is the controlling party of the wet scrubber basic species supply being provided according to one embodiment of the present invention
The flow chart of method；And
Fig. 3 is the structural frames of the control device of the wet scrubber basic species supply being provided according to the present invention
Figure.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that
Specific embodiment described herein is merely to illustrate and explains the present invention, is not limited to this
Bright.
Fig. 1 is the structural frames of the control method of the wet scrubber basic species supply being provided according to the present invention
Figure, as shown in figure 1, the control method that the wet scrubber basic species that the present invention provides supply can include：
At step 10, determine the load signal variable quantity in the unit scheduled time；At step 11, detection
The pH value of recirculated water and/or the pH value of draining；And at step 12, according to described load signal
The pH value of variable quantity and described recirculated water and/or the pH value of described draining, control described alkali measuring pump to press
Run according to preset value.So draining pH value and circulating water PH value can be rapidly adjusted in time and make it
It is maintained in relatively small scope, reduces the corrosion to deduster, be conducive to its sustainable operation.
Wherein, described preset value includes the first preset value and the second preset value；Described load signal variable quantity
Including the first default variable quantity and the second default variable quantity；Load increase and described recirculated water pH value
It is less than the situation of the first draining preset value less than the pH value of first circulation water preset value and/or described draining
Under, described control method includes one of following：If the absolute value of described load signal variable quantity is big
In or be equal to the first default variable quantity, then control described alkali measuring pump to run according to the first preset value；And
If the absolute value of described load signal variable quantity is more than or equal to the second default variable quantity, control described
Alkali measuring pump runs according to the second preset value, and wherein, it is pre- that the described first default variable quantity is less than described second
If variable quantity, described first preset value is less than described second preset value.
Described load signal variable quantity also includes the 3rd default variable quantity；In the case of load reduction, such as
The absolute value of really described load signal variable quantity is more than the pH value of the 3rd default variable quantity and described recirculated water
It is less than or equal to the second draining less than or equal to the pH value of second circulation water preset value and/or described draining
In the case of preset value, described alkali measuring pump is controlled to run according to described first preset value, wherein said the
Two-cycle preset value is more than described first circulation water preset value, and described second draining preset value is less than described
First draining preset value.
Due in load within a time period (in such as 10 minutes) variable quantity exceed the situation of preset value
Under, the acidity of recirculated water and draining can be increased, therefore adopt the said method that the present invention provides, Neng Gou
Receive load setting instruction when, according to the load variations that will produce, before reaching assumed load or
Just can decide whether to change according to load variations before controlling unit to run according to assumed load
Become the operational factor of alkali measuring pump, change the pH value of recirculated water and the pH value of draining with timely.
In order to be further ensured that the stability of circulating water PH value and draining pH value, increase described in load
In the case that the absolute value of load signal variable quantity is less than the described first default variable quantity, in load reduction and
In the case that the absolute value of described load signal variable quantity is less than the described 3rd default variable quantity and load not
In the case of change, described control method includes one of following：If the pH value of described recirculated water is big
In or be equal to the pH value of described first circulation water preset value and/or described draining and be more than or equal to described the
One draining preset value, controls described alkali measuring pump to stop；If the pH value of described recirculated water is less than or waits
PH value in described second circulation water preset value and/or described draining is less than or equal to described second draining
Preset value, controls described alkali measuring pump to run according to described second preset value；And if described recirculated water
PH value be less than or equal to the 3rd recirculated water preset value and more than described second circulation water preset value and/or
The pH value of described draining is less than or equal to the 3rd draining preset value and is more than described second draining preset value,
Described alkali measuring pump is controlled to run according to the first preset value, wherein said 3rd recirculated water preset value is less than institute
State second circulation water preset value, described 3rd draining preset value is less than described second draining preset value.
For example, when recirculated water pH value be less than or equal to 8.5 or draining pH value be less than or equal to 7
When, alkali measuring pump can be controlled according to 20Hz startup optimization；When the pH value of recirculated water is less than or equal to 8
Or the pH value of draining be less than or equal to 6.5 when, can control alkali measuring pump according to 50Hz run, for example
Can adjust to 50Hz from 20Hz；When the pH value of recirculated water is more than or equal to the pH value of 9 or draining
During more than or equal to 7.5, alkali measuring pump can be controlled out of service.
Described load signal variable quantity can also be flue gas flow change, flue gas flow and the machine of described unit
Group load is directly proportional, and therefore, it can for flue gas flow change to be turned to load signal variable quantity.Wherein, bear
Lotus change amount signal is that assumed load value is become with the difference of current loads value or the flue gas flow of described unit
Change.
The control method of the wet scrubber basic species supply being provided by the present invention, enables to recirculated water
PH value fluctuate between 8-9, the pH value of draining fluctuates between 6.5-7.5, fluctuation range very little,
Reduce corrosion-damaged to equipment.
Hereinafter the present invention will be described in detail by specific embodiment, it is noted that this
Bright it is not restricted to this.
Taking Mitsubishi heavy industry (phenanthrene reaches environmental protection) FW146 type wet type electric smoke precipitation device as a example, its dust
Removal efficiency >=70%, PM2.5 clearance >=70%, droplet clearance >=70%, SO3 clearance >=
70%.Existing control mode includes draining PH and controls and recirculated water PH control.Draining when draining controls
Alkali measuring pump is run so that alkali meter during circulating water PH value≤8.5 when pH value≤5.5 or circulation water management
20Hz startup optimization pressed by amount pump；And draining pH value≤5 or the metering of circulating water PH value≤8 time control alkaline
Pump is pressed 50Hz and is run；In addition, alkali measuring pump stops when draining pH value >=7 or circulating water PH value >=10
Run.There is circulated sprinkling water ph value and fluctuate between 6 to 10 in current control mode, draining PH
Value fluctuates between 4 to 8, and fluctuating range is excessive, and haves the shortcomings that control lag.
The technical scheme being provided by the present invention is it can be avoided that or improve the problems referred to above.By by assumed load
The feed-forward signal controlling as PH with the difference of current loads, that is, when load increases excessive, opens in advance
Open alkali measuring pump or improve the speed of service of alkali measuring pump to carry out pH value regulation.In addition by recirculated water PH
Value and/or draining pH value, as feedback signal, to control the operation of alkali measuring pump to enter in conjunction with load variations
Row pH value is adjusted.So that the fluctuation of circulating water PH value and draining pH value is relatively small, and adjust
Section is more rapid, regulated value is more accurate.
Fig. 2 is the controlling party of the wet scrubber basic species supply being provided according to one embodiment of the present invention
The flow chart of method.
As shown in Fig. 2 at step 201, judge load in the given time incrementss whether more than or
(can also judge whether incrementss are more than or equal to unit flue gas flow in the given time equal to 20%
30%), that is, judge whether load increases and whether scheduled time internal loading variable quantity is more than or equal to 20%；
If load incrementss are more than or equal to 20%, at step 202, judge whether to meet recirculated water
The pH value ＜ 7.5 of pH value ＜ 9 or draining (can certainly be by the pH value ＜ 9 of recirculated water and draining
PH value ＜ 7.5 is as Rule of judgment)；If the pH value ＜ 9 of the recirculated water or pH value ＜ 7.5 of draining,
Then at step 203, alkali measuring pump is controlled to run according to 50Hz；If being unsatisfactory for the PH of recirculated water
The pH value ＜ 7.5 of value ＜ 9 or draining, then, at step 204, control alkali measuring pump out of service.
If incrementss are more than or equal to 20% in the given time to be unsatisfactory for load, at step 205,
Judge whether incrementss (can also judge unit flue gas stream more than or equal to 10% to load in the given time
Whether incrementss are more than or equal to 15% to amount in the given time)；If load incrementss are more than or equal to
10%, then at step 206, judge whether to meet the pH value ＜ of the pH value ＜ 9 of recirculated water or draining
7.5 (can certainly using the pH value ＜ 9 of recirculated water and draining pH value ＜ 7.5 as Rule of judgment)；
If the pH value ＜ 9 of the recirculated water or pH value ＜ 7.5 of draining, at step 207, control alkali meter
Amount pump is according to 20Hz startup optimization；If being unsatisfactory for the pH value ＜ 9 of the recirculated water or pH value ＜ of draining
7.5, then at step 204, control alkali measuring pump out of service.
If being unsatisfactory for load incrementss to be more than or equal to 10%, at step 208, judge that load exists
In the scheduled time, whether reduction amount (can also judge unit flue gas flow in pre- timing more than or equal to 20%
Whether interior reduction amount is more than or equal to 30%), that is, judge whether load reduces and scheduled time internal loading
Whether variable quantity is more than or equal to 20%；If reduction amount is more than or equal to load in the given time
20%, then at step 209, judge whether to meet the pH value of pH value≤8 of recirculated water or draining≤
6.5 (can certainly using pH value≤8 of recirculated water and draining pH value≤6.5 as Rule of judgment)；
If meeting pH value≤8 of recirculated water or pH value≤6.5 of draining, at step 207, control
Alkali measuring pump is according to 20Hz startup optimization；If being unsatisfactory for pH value≤8 of recirculated water or the PH of draining
Value≤6.5, then, at step 204, control alkali measuring pump to stop.
When above-mentioned situation is unsatisfactory for for load variations, at step 210, judge whether to meet recirculated water
PH value≤8 or pH value≤6.5 of draining (can certainly be by pH value≤8 of recirculated water and draining
PH value≤6.5 as Rule of judgment)；If meeting pH value≤8 of recirculated water or the pH value of draining
≤ 6.5, then at step 203, control alkali measuring pump to run according to 50Hz；If being unsatisfactory for recirculated water
PH value≤8 or draining pH value≤6.5, then at step 211, judge whether to meet 8 ＜ circulations
PH value≤7 of pH value≤8.5 of water or 6.5 ＜ drainings (can certainly be by the PH of 8 ＜ recirculated waters
PH value≤7 of value≤8.5 and 6.5 ＜ drainings are as Rule of judgment)；If meeting the PH of 8 ＜ recirculated waters
PH value≤7 of value≤8.5 or 6.5 ＜ drainings, then, at step 2.7, control alkali measuring pump according to 20Hz
Startup optimization；If being unsatisfactory for pH value≤8.5 of 8 ＜ recirculated waters or pH value≤7 of 6.5 ＜ drainings,
Then at step 212, judge whether to meet pH value >=9 of recirculated water or draining pH value >=7.5 (when
So can also using pH value >=9 of recirculated water and draining pH value >=7.5 as Rule of judgment)；If
Meet pH value >=9 of recirculated water or pH value >=7.5 of draining, then, at step 204, control alkali meter
Amount pump stops；If being unsatisfactory for pH value >=9 of recirculated water or pH value >=7.5 of draining, return.
Wherein shown in Fig. 2, flow chart is not intended to limit the order of each step, and those skilled in the art can be right
Fig. 2 illustrated embodiment carries out any modification to realize the present invention.
Correspondingly, as shown in figure 3, the present invention also provides a kind of control of wet scrubber basic species supply
The structured flowchart of device, described control device can include：Determining module 31, predetermined for determining unit
Load signal variable quantity in time；Detection module 33, for detecting pH value and/or the row of recirculated water
The pH value of water；And processing module 32, according to described load signal variable quantity and described recirculated water
PH value and/or the pH value of described draining, control described alkali measuring pump to run according to preset value.So energy
Enough rapidly adjust draining pH value and circulating water PH value in time and keep it in relatively small scope
Interior, reduce the corrosion to deduster, be conducive to its sustainable operation.
Wherein, described preset value includes the first preset value and the second preset value；Described load signal variable quantity
Including the first default variable quantity and the second default variable quantity；Load increase and described recirculated water pH value
It is less than the situation of the first draining preset value less than the pH value of first circulation water preset value and/or described draining
Under, described processing module 32 is used for：If the absolute value of described load signal variable quantity is more than or equal to
First default variable quantity, then control described alkali measuring pump to run according to the first preset value；And it is if described
The absolute value of load signal variable quantity is more than or equal to the second default variable quantity, then control described alkali measuring pump
Run according to the second preset value, wherein, the described first default variable quantity is less than the described second default variable quantity,
Described first preset value is less than described second preset value.
Described load signal variable quantity also includes the 3rd default variable quantity；In the case of load reduction, such as
The absolute value of really described load signal variable quantity is more than the pH value of the 3rd default variable quantity and described recirculated water
It is less than or equal to the second draining less than or equal to the pH value of second circulation water preset value and/or described draining
In the case of preset value, described processing module 32 is used for controlling described alkali measuring pump according to the first preset value
Run, wherein said second circulation water preset value is more than described first circulation water preset value, described second row
Water preset value is less than described first draining preset value.
In the case that in load, within a time period, variable quantity exceedes preset value, can increase recirculated water and
The acidity of draining, therefore adopts the said method that the present invention provides, and can receive load setting instruction
When, according to the load variations that will produce, according to setting before reaching assumed load or in control unit
Just can be decided whether according to load variations before load operation to change the operation ginseng of alkali measuring pump
Number, changes the pH value of recirculated water and the pH value of draining with timely.
In order to be further ensured that the stability of circulating water PH value and draining pH value, increase described in load
In the case that the absolute value of load signal variable quantity is less than the described first default variable quantity, in load reduction and
In the case that the absolute value of described load signal variable quantity is less than the described 3rd default variable quantity and load not
In the case of change, described processing module is used for executing one of following：If the PH of described recirculated water
Value is more than or equal to first row more than or equal to the pH value of first circulation water preset value and/or described draining
Water preset value, controls described alkali measuring pump to stop；If the pH value of described recirculated water is less than or equal to the
The pH value of two-cycle preset value and/or described draining is less than or equal to the second draining preset value, controls institute
State alkali measuring pump to run according to the second preset value；And if the pH value of described recirculated water is less than or equal to
3rd recirculated water preset value and little more than the pH value of described second circulation water preset value and/or described draining
In or be equal to the 3rd draining preset value and be more than described second draining preset value, control described alkali measuring pump press
Run according to the first preset value, wherein said 3rd recirculated water preset value is less than described second circulation water and presets
Value, described 3rd draining preset value is less than described second draining preset value.
Load signal variable quantity is assumed load value and the difference of current loads value or the flue gas of described unit
Changes in flow rate.
Describe the preferred embodiment of the present invention above in association with accompanying drawing in detail, but, the present invention does not limit
Detail in above-mentioned embodiment, in the range of the technology design of the present invention, can be to the present invention
Technical scheme carry out multiple simple variant, these simple variant belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned specific embodiment is special
Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid need not
The repetition wanted, the present invention no longer separately illustrates to various possible combinations.
Additionally, can also be combined between the various different embodiment of the present invention, as long as its
Without prejudice to the thought of the present invention, it equally should be considered as content disclosed in this invention.
Claims (10)
1. a kind of control method of wet scrubber basic species supply is it is characterised in that described controlling party
Method includes：
Determine the load signal variable quantity in the unit scheduled time；
The detection pH value of recirculated water and/or the pH value of draining；And
PH value according to described load signal variable quantity and described recirculated water and/or the PH of described draining
Value, controls described alkali measuring pump to run according to preset value.
2. control method according to claim 1 is it is characterised in that described preset value includes
One preset value and the second preset value；Described load signal variable quantity includes the first default variable quantity and second pre-
If variable quantity；Increase in load and the pH value of described recirculated water is less than first circulation water preset value and/or institute
State draining pH value be less than the first draining preset value in the case of, described control method include following in
One：
If the absolute value of described load signal variable quantity is more than or equal to the first default variable quantity, control
Described alkali measuring pump runs according to the first preset value；And
If the absolute value of described load signal variable quantity is more than or equal to the second default variable quantity, control
Described alkali measuring pump runs according to the second preset value,
Wherein, the described first default variable quantity is less than the described second default variable quantity, described first preset value
Less than described second preset value.
3. control method according to claim 2 is it is characterised in that described load signal changes
Amount also includes the 3rd default variable quantity；In the case of load reduction, if described load signal variable quantity
Absolute value be more than the 3rd default variable quantity and the pH value of described recirculated water is less than or equal to second circulation water
In the case that the pH value of preset value and/or described draining is less than or equal to the second draining preset value, control institute
State alkali measuring pump to run according to described first preset value,
Wherein said second circulation water preset value is more than described first circulation water preset value, described second draining
Preset value is less than described first draining preset value.
4. control method according to claim 3 it is characterised in that increase described negative in load
In the case that the absolute value of lotus change amount signal is less than the described first default variable quantity, in load reduction and institute
State load signal variable quantity absolute value be less than the described 3rd default variable quantity in the case of and load constant
In the case of, described control method includes one of following：
If the pH value of described recirculated water is more than or equal to described first circulation water preset value and/or described
The pH value of draining is more than or equal to described first draining preset value, controls described alkali measuring pump to stop；
If the pH value of described recirculated water is less than or equal to described second circulation water preset value and/or described
The pH value of draining is less than or equal to described second draining preset value, controls described alkali measuring pump according to described
Second preset value runs；And
If the pH value of described recirculated water is less than or equal to the 3rd recirculated water preset value and is more than described second
The pH value of recirculated water preset value and/or described draining is less than or equal to the 3rd draining preset value and is more than institute
State the second draining preset value, control described alkali measuring pump to run according to the first preset value,
Wherein said 3rd recirculated water preset value is less than described second circulation water preset value, described 3rd draining
Preset value is less than described second draining preset value.
5. control method according to any one of claim 1 to 4 is it is characterised in that described
Load signal variable quantity is assumed load value and the difference of current loads value or the flue gas flow of described unit
Change.
6. a kind of control device of wet scrubber basic species supply is it is characterised in that described control fills
Put including：
Determining module, for determining the load signal variable quantity in the unit scheduled time；
Detection module, for detecting the pH value of recirculated water and/or the pH value of draining；And
Processing module, the pH value according to described load signal variable quantity and described recirculated water and/or described row
The pH value of water, controls described alkali measuring pump to run according to preset value.
7. control device according to claim 6 is it is characterised in that described preset value includes
One preset value and the second preset value；Described load signal variable quantity includes the first default variable quantity and second pre-
If variable quantity；Increase in load and the pH value of described recirculated water is less than first circulation water preset value and/or institute
State draining pH value be less than the first draining preset value in the case of, described processing module is used for executing following
One of：
If the absolute value of described load signal variable quantity is more than or equal to the first default variable quantity, control
Described alkali measuring pump runs according to the first preset value；And
If the absolute value of described load signal variable quantity is more than or equal to the second default variable quantity, control
Described alkali measuring pump runs according to the second preset value,
Wherein, the described first default variable quantity is less than the described second default variable quantity, described first preset value
Less than described second preset value.
8. control device according to claim 7 is it is characterised in that described load signal changes
Amount also includes the 3rd default variable quantity；In the case of load reduction, if described load signal variable quantity
Absolute value be more than the 3rd default variable quantity and the pH value of described recirculated water is less than or equal to second circulation water
In the case that the pH value of preset value and/or described draining is less than or equal to the second draining preset value, described place
Reason module is used for controlling described alkali measuring pump to run according to described first preset value,
Wherein said second circulation water preset value is more than described first circulation water preset value, described second draining
Preset value is less than described first draining preset value.
9. control device according to claim 8 it is characterised in that increase described negative in load
In the case that the absolute value of lotus change amount signal is less than the described first default variable quantity, in load reduction and institute
State load signal variable quantity absolute value be less than the described 3rd default variable quantity in the case of and load constant
In the case of, described processing module is used for executing one of following：
If the pH value of described recirculated water is more than or equal to described first circulation water preset value and/or described
The pH value of draining is more than or equal to described first draining preset value, controls described alkali measuring pump to stop；
If the pH value of described recirculated water is less than or equal to described second circulation water preset value and/or described
The pH value of draining is less than or equal to described second draining preset value, controls described alkali measuring pump according to described
Second preset value runs；And
If the pH value of described recirculated water is less than or equal to the 3rd recirculated water preset value and is more than described second
The pH value of recirculated water preset value and/or described draining is less than or equal to the 3rd draining preset value and is more than institute
State the second draining preset value, control described alkali measuring pump to run according to described first preset value,
Wherein said 3rd recirculated water preset value is less than described second circulation water preset value, described 3rd draining
Preset value is less than described second draining preset value.
10. the control device according to any one of claim 6 to 9 is it is characterised in that described
Load signal variable quantity is assumed load value and the difference of current loads value or the flue gas flow of described unit
Change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610471034.8A CN106391310A (en) | 2016-06-24 | 2016-06-24 | Control method and device for alkaline substance supply of wet type dust collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610471034.8A CN106391310A (en) | 2016-06-24 | 2016-06-24 | Control method and device for alkaline substance supply of wet type dust collector |
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| CN106391310A true CN106391310A (en) | 2017-02-15 |
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| CN201610471034.8A Pending CN106391310A (en) | 2016-06-24 | 2016-06-24 | Control method and device for alkaline substance supply of wet type dust collector |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2948810B1 (en) * | 1998-06-23 | 1999-09-13 | 川崎重工業株式会社 | Method and apparatus for controlling wet flue gas desulfurization system |
| CN1286135A (en) * | 2000-08-18 | 2001-03-07 | 清华大学 | Liquid column spray process and system with pH value regulator for desulfurizing flue gas |
| WO2013104373A1 (en) * | 2012-01-12 | 2013-07-18 | Linde Aktiengesellschaft | Method for removing hydrogen sulphide from gases containing carbon dioxide |
| CN105536535A (en) * | 2016-01-11 | 2016-05-04 | 煤科集团杭州环保研究院有限公司 | Soda lime dual-alkali smoke desulfurization automatic circulating and refluxing regeneration system and treatment technology thereof |
-
2016
- 2016-06-24 CN CN201610471034.8A patent/CN106391310A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2948810B1 (en) * | 1998-06-23 | 1999-09-13 | 川崎重工業株式会社 | Method and apparatus for controlling wet flue gas desulfurization system |
| CN1286135A (en) * | 2000-08-18 | 2001-03-07 | 清华大学 | Liquid column spray process and system with pH value regulator for desulfurizing flue gas |
| WO2013104373A1 (en) * | 2012-01-12 | 2013-07-18 | Linde Aktiengesellschaft | Method for removing hydrogen sulphide from gases containing carbon dioxide |
| CN105536535A (en) * | 2016-01-11 | 2016-05-04 | 煤科集团杭州环保研究院有限公司 | Soda lime dual-alkali smoke desulfurization automatic circulating and refluxing regeneration system and treatment technology thereof |
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Application publication date: 20170215 |