CN106237830A - The material feeding control method of a kind of lime stone handling system and system - Google Patents
The material feeding control method of a kind of lime stone handling system and system Download PDFInfo
- Publication number
- CN106237830A CN106237830A CN201610772526.0A CN201610772526A CN106237830A CN 106237830 A CN106237830 A CN 106237830A CN 201610772526 A CN201610772526 A CN 201610772526A CN 106237830 A CN106237830 A CN 106237830A
- Authority
- CN
- China
- Prior art keywords
- pump
- rewinding
- feed pump
- feed
- charging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 134
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 77
- 239000006028 limestone Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 41
- 230000001960 triggered effect Effects 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims description 22
- 230000007246 mechanism Effects 0.000 claims description 15
- 238000006477 desulfuration reaction Methods 0.000 abstract description 12
- 230000008676 import Effects 0.000 description 16
- 230000023556 desulfurization Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000006052 feed supplement Substances 0.000 description 6
- 230000006698 induction Effects 0.000 description 5
- 108010066057 cabin-1 Proteins 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 108010066114 cabin-2 Proteins 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000010117 shenhua Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to desulfuration in furnace technical field, disclose material feeding control method and the system of a kind of lime stone handling system, wherein said lime stone handling system includes the most vertically arranged powder cabin, rewinding pump and feed pump, described material feeding control method includes: detect when the low level signals of feed pump is triggered, execution feed pump feeds, and makes material be fallen into feed pump by rewinding pump；After the feed pump charging performing the scheduled time, stop carrying material to feed pump；Stop, after feed pump conveying material, performing the charging of rewinding pump, making material be fallen into rewinding pump by powder cabin；And after the rewinding pump charging performing the scheduled time or when detecting that the high charge level signal of rewinding pump is triggered, stop to rewinding transport pump material.Present invention reduces lime stone handling system material feeding and control the circular flow time of step sequence, thus improve the overall conveying output capacity of lime stone handling system.
Description
Technical field
The present invention relates to desulfuration in furnace technical field, in particular it relates to the material feeding controlling party of a kind of lime stone handling system
Method and system.
Background technology
At present, owing to boiler combustion coal sulfur content is high, existing limestone desulfurization system cannot meet discharge in 2014
Concentration is less than 200mg/Nm3Environmental protection new demand.Therefore, in order to ensure limestone desulfurization system stability longtime running, meet 2014
Year environment protection emission new demand, proposes in prior art and transforms existing limestone boiler desulfurization system, main transformation
Scheme includes: former powder cabin increases gasification heating system, and is transform powder cabin feed opening as Breeches type double blanking by single feed opening
Mouthful, and respectively arrange a set of lime stone handling system at two feed openings.
As it is shown in figure 1, the control flow of the lime stone handling system arranged is: in the properly functioning journey of boiler, limestone
The agstone of powder cabin enters lime stone handling system, and the limestone material in limestone powder bin is passed through by lime stone handling system
Pipelined near boiler, be then further divided into 3 tunnel/4 tunnels respectively from furnace rear material returning valve and front wall overfiren air port enter burner hearth
Internal, it is achieved the purpose of furnace sorbent injection desulfurization.
But, when carrying out limestone conveying flow process debugging based on above-mentioned improved limestone desulfurization system, high at unit
Finding under load condition that the control flow of lime stone handling system cannot meet exerting oneself of system conveying, the entirety affecting boiler takes off
Sulphur efficiency and environment protection emission, it is therefore desirable to control flow former to lime stone handling system is optimized.
Summary of the invention
It is an object of the invention to provide material feeding control method and the system of a kind of lime stone handling system, be used for optimizing existing
Lime stone handling system control flow, to improve the overall conveying output capacity of limestone desulfurization system.
To achieve these goals, the present invention provides the material feeding control method of a kind of lime stone handling system, wherein said
Lime stone handling system includes that the most vertically arranged powder cabin, rewinding pump and feed pump, described material feeding control method include:
Detect when the low level signals of feed pump is triggered, perform feed pump charging, make material be fallen into feed pump by rewinding pump；Holding
After the feed pump charging of the row scheduled time, stop carrying material to feed pump；Stop, after feed pump conveying material, performing rewinding
Pump feeds, and makes material be fallen into rewinding pump by powder cabin；And perform the scheduled time rewinding pump charging after or rewinding pump detected
High charge level signal when being triggered, stop to rewinding transport pump material.
Alternatively, the charging of described execution feed pump includes: pressurize rewinding pump, until the pressure in described rewinding pump is more than
Or equal to the pressure in feed pump；And make the air on feed pump top return rewinding pump, and open rewinding pump and feed pump it
Between valve, make material in rewinding pump fall into feed pump.
Alternatively, described pressurize rewinding pump includes: arrange the opening connecting compressed air conveying pipeline on rewinding pump,
And rewinding pump pressure balanced valve is set on described compressed air conveying pipeline；And open described rewinding pump pressure balanced valve,
Allow compressed air into rewinding pump so that described rewinding pump to be pressurizeed, and the pressure in described rewinding pump is more than or equal to feed pump
In pressure time, close described rewinding pump pressure balanced valve.
Alternatively, in described feed pump and described rewinding pump, it is respectively provided with the first filler intervalometer and the timing of the second filler
Device, is respectively used to set the scheduled time performing feed pump charging.
Alternatively, the charging of described execution rewinding pump includes: reduce pressure rewinding pump；And the pressure in rewinding pump drops to
Setting value or decline after the setting time, opens the valve between rewinding pump and powder cabin, makes the material in powder cabin fall into rewinding pump.
Present invention also offers the material feeding control system of a kind of lime stone handling system, wherein said lime stone handling system
Including the most vertically arranged powder cabin, rewinding pump and feed pump, wherein said material feeding control system includes: feed pump feeds
Control unit, for detecting when the low level signals of feed pump is triggered, performs feed pump charging, makes material be fallen by rewinding pump
Enter feed pump；Feed pump charging stop element, for after the feed pump charging performing the scheduled time, stops carrying to feed pump
Material；Feed pump feed control unit, for stop to feed pump conveying material after, perform rewinding pump charging, make material by
Powder cabin falls into rewinding pump；And feed pump charging stop element, it is used for after the rewinding pump charging performing the scheduled time or detection
When high charge level signal to rewinding pump is triggered, stop to rewinding transport pump material.
Alternatively, described feed pump feed control unit includes: pressing mechanism, for rewinding pump is pressurizeed, until described
Pressure in rewinding pump is more than or equal to the pressure in feed pump；And first feeding mechanism, for making the sky on feed pump top
Gas returns rewinding pump, and opens the valve between rewinding pump and feed pump, makes material in rewinding pump fall into feed pump.
Alternatively, described pressing mechanism includes: compressed air conveying pipeline, its opening connected on rewinding pump, is used for making
Compressed air enters rewinding pump to pressurize described rewinding pump；And rewinding pump pressure balanced valve, it is arranged on described compression sky
On letter shoot road, it is used for controlling compressed air and enters described rewinding pump by described compressed air conveying pipeline.
Alternatively, in described feed pump and described rewinding pump, it is respectively provided with the first filler intervalometer and the timing of the second filler
Device, is respectively used to set the scheduled time performing feed pump charging.
Alternatively, described rewinding pump feed control unit includes: the mechanism of decompressor, for reducing pressure rewinding pump；And second
Feeding mechanism, after pressure in rewinding pump drops to setting value or declines the setting time, open rewinding pump and powder cabin it
Between valve, make the material in powder cabin fall into rewinding pump.
By technique scheme, the invention has the beneficial effects as follows: present invention reduces lime stone handling system material feeding control
The circular flow time of system step sequence, thus improve the overall conveying output capacity of lime stone handling system, it is ensured that the entirety of boiler takes off
Sulphur efficiency and environment protection standard discharge, make unit generation produce more safe and environment-friendly and economical.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not intended that limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of existing limestone conveying flow process；
Fig. 2 is the structural representation of lime stone handling system in the embodiment of the present invention；
Fig. 3 is the schematic flow sheet that the lime stone handling system to Fig. 2 carries out that conventional material feeding controls；
Fig. 4 is the schematic flow sheet of the material feeding control method in the embodiment of the present invention；
Fig. 5 is that the embodiment of the present invention carries out the schematic flow sheet of material feeding control to the lime stone handling system of Fig. 2；
Fig. 6 is the structural representation of the material feeding control system in the embodiment of the present invention.
Description of reference numerals
1 powder cabin 2 rewinding pump
3 feed pump 4 rewinding pump inlet dome valves
5 feed pump import dome valve 6 feed stock position low switches
7 rewinding stock position high switch 8 rewinding pump exhaust circle overhead-valves
9 feed pump balance dome valve 10 rewinding pump pressure balanced valves
61 feed pump feed control unit 62 feed pump charging stop elements
63 feed pump feed control unit 64 feed pump charging stop elements
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.It should be appreciated that this place is retouched
The detailed description of the invention stated is merely to illustrate and explains the present invention, is not limited to the present invention.
In the present invention, in the case of illustrating on the contrary, the noun of locality of use such as " upper and lower " typically refers to respective wheel
Wide is upper and lower, and " inside and outside " refers to the interior and outer of respective profile.
The embodiment of the present invention is for the lime stone handling system of boiler, as a example by lime stone handling system as shown in Figure 2, this
The lime stone handling system related in inventive embodiments mainly includes the most vertically arranged powder cabin 1, rewinding pump 2 and feed
Pump 3, additionally includes providing the volumetric feeder of material and some accessories to powder cabin.Wherein, volumetric feeder passes through tooth
Roller box is driven by frequency conversion motor, regulates equipment by converter regulation motor speed and exerts oneself, to carry material to powder cabin 1.Receive
Material pump 2 and feed pump 3 be pressure vessel, and its import department is separately installed with the valve controlling material entrance, wherein the entering of rewinding pump 2
Valve at Kou can be rewinding pump inlet dome valve 4, and the valve of the porch of feed pump 3 can be feed pump import dome
Valve 5.
Further, the lime stone handling system of the present embodiment can also include: feed pump 3 bottom being respectively provided with and receipts
The feed stock position low switch 6 on material pump 2 top and the high switch in rewinding stock position 7, be respectively used to detect the low material position letter of feed pump 3
Number and the high charge level signal of rewinding pump 2；And be arranged between rewinding pump 2 top and powder cabin 1 rewinding pump exhaust circle overhead-valve 8,
It is arranged on feed pump top and the feed pump balance dome valve 9 being exported on the passage on rewinding pump top.Especially, also in rewinding
The opening connecting compressed air conveying pipeline is set on pump 2, and rewinding pump pressure is set on described compressed air conveying pipeline
Balanced valve 10.
Wherein, the above-mentioned dome valve related to is preferably pneumatic operated valve, by inflating to dome valve O-ring seal, can reach tight
Sealing.About the concrete function of above-mentioned valve, will be explained in greater detail below.
This lime stone handling system runs under continuation mode, and when material is in conveying, feed pump 3 is by pressurized, and receives
Material pump 2 will periodically, injected in feed pump 3 by material in time, and plays feed pump 3 and the powder cabin of limestone with high pressure
1 mutually isolated effect, thus ensure that material is transported in the burner hearth of boiler continuously.
For above-mentioned lime stone handling system, the original state of conventional material feeding program control step sequence is: rewinding pump inlet dome
Valve 4 cuts out, and rewinding pump 2 is empty state, when feed stock position low switch 6 does not covers and is triggered, carries out material feeding.
Conventional shot process starts as follows: opening rewinding pump exhaust circle overhead-valve 8, in rewinding pump 2, pressure starts
Declining, in rewinding pump 2, overbottom pressure gas is thus discharged, and after overbottom pressure discharge, rewinding pump inlet dome valve 4 is opened, and material relies on
Gravity is fallen in rewinding pump 2 by powder cabin 1；When rewinding pump high charge level signal triggers or during when the rewinding pump filler scheduled time, receive
Material pump inlet dome valve 4 is closed, and rewinding pump exhaust circle overhead-valve 8 cuts out, and then rewinding pump pressure balanced valve 10 is opened, rewinding pump 2
Interior pressure begins to ramp up；When in rewinding pump 2, pressure is more than or equal to the pressure of feed pump 3, rewinding pump pressure balanced valve 10 cuts out,
Feed pump balance dome valve 9 is opened, and feed pump 3 upper air returns rewinding pump 2 by feed pump balance dome valve 9, gives immediately
Material pump inlet dome valve 5 is opened, and material relies on gravity to fall into feed pump 3 from rewinding pump 2；Through one period set in advance it
After, the process being fallen into feed pump by rewinding pump depending on material terminates, rewinding pump pressure balanced valve 10, feed pump import dome valve 5 and
Feed pump balance dome valve 9 is closed；When feed pump import dome valve 5 is closing and sealing off, and shot process completes, when the low material of feed pump
Position signal carries out next circulation after again triggering.
As it is shown on figure 3, concrete rate-determining steps is as follows:
Step S31, the low level signals of detection feed pump.
Step S32, when the low level signals of feed pump is triggered, opens rewinding pump exhaust circle overhead-valve and carries out pressure release.
Wherein, rewinding pump exhaust circle overhead-valve is charged to be opened, and makes the pressure in rewinding pump begin to decline.Meanwhile, aerofluxus timing
Device (such as 10 seconds) and filler circulation monitor that intervalometer (such as 140 seconds) will start timing, make the pressure in rewinding pump drop to meet
Demand.
Step S33, opens rewinding pump inlet dome valve, makes material will be fallen in rewinding pump by limestone powder bin.
Specifically, after the pressure of rewinding pump drops below expection (such as 0.2barg) and aerofluxus timing arrives, receive
Material pump inlet dome valve is opened charged, makes material will be fallen in rewinding pump by limestone powder bin.It addition, the equilibrium of rewinding pump pressure
Valve also will electric open, the filler intervalometer (such as 30 seconds) of short-term will start timing, to control the time that rewinding pump feeds.
Step S34, completes when the high switch in rewinding stock position is capped or works as short-term filler intervalometer, rewinding pump inlet circle
Overhead-valve and rewinding pump exhaust circle overhead-valve dead electricity are closed respectively.
Step S35, opens the rewinding steady air pressure of pump pressure balanced valve, makes the pressure of rewinding pump begin to ramp up.
Step S36, when the pressure in rewinding pump is more than or equal to the pressure in feed pump, rewinding pump pressure balanced valve will
Dead electricity and close, feed pump import dome valve obtains electric and opens, feed pump import dome valve open intervalometer (such as 30 seconds) will
Starting timing, material will be fallen in feed pump by rewinding pump.
Step S37, after feed pump import dome valve is opened, rewinding pump pressure balanced valve and feed pump balance dome valve will
Open respectively.
Step S38, when feed pump import dome valve intervalometer completes, rewinding pump pressure balanced valve, feed pump import circle
Overhead-valve and feed pump balance dome valve will be closed respectively.
Step S39, after feed pump import dome valve and balance dome valve are closed, cycle reset intervalometer (e.g., 3s)
Timing will be started.When cycle reset intervalometer timing completes, filler circulation will be done.
From above-mentioned steps S31-S39 it can be seen that above-mentioned material feeding flow process there is problems in that when a material feeding circulation is program control
After step sequence completes, lime stone handling system returns to original state, and under this original state, rewinding pump inlet dome valve is closed, and receives
Material pump is empty state, if now the low level signals of feed pump triggers, rewinding pump starts to perform rewinding pump charging step sequence, so
The rear feed pump that just performs feeds step sequence；If now boiler desulfurization amount of lime is big, limestone batcher is exerted oneself bigger feelings
Under condition, after the low level signals of feed pump triggers, control step sequence according to above-mentioned material feeding and feed because failing to perform in time feed pump
Step sequence carries out feed supplement, can cause feed pump because material position is low and fracture, thus the entirety affecting induction system is exerted oneself, and finally causes stone
The in-furnace calcium spraying of lime stone induction system interrupts and affects bulk devulcanization and the environment protection emission of boiler.
On this basis, in order to shorten the system charge circular flow time, improve the overall conveying output capacity of system, it is to avoid send out
Calculogenesis lime stone fracture situation, the embodiment of the present invention controls step sequence and is optimized, to shorten limestone above-mentioned limestone material feeding
Induction system material feeding controls the circular flow time of step sequence.
The embodiment of the present invention is by the analysis of step sequence program control to above-mentioned material feeding, it is known that: the low level signals at feed pump touches
When sending out, want in time feed pump to be carried out feed supplement, anti-locking system fracture, then feed pump charging step sequence must be first carried out rather than
The charging step sequence of rewinding pump, but the premise so performed is must to have material in rewinding pump, thus need in the low material position of feed pump
Rewinding pump charging step sequence is performed the most in advance when signal does not triggers.
Accordingly, as shown in Figure 4, the material feeding control method of a kind of lime stone handling system is embodiments provided, should
Material feeding control method may comprise steps of:
Step S41, detects when the low level signals of feed pump is triggered, and performs feed pump charging, makes material by rewinding
Pump falls into feed pump.
Wherein, perform feed pump charging and include: rewinding pump is pressurizeed, until the pressure in described rewinding pump is more than or equal to
Pressure in feed pump；And make the air on feed pump top return rewinding pump, and open immediately between rewinding pump and feed pump
Valve, make material in rewinding pump fall into feed pump.
Further, the pressurization of rewinding pump is included: the opening connecting compressed air conveying pipeline is set on rewinding pump, and
Described compressed air conveying pipeline arranges rewinding pump pressure balanced valve；And open described rewinding pump pressure balanced valve, make
Compressed air entrance rewinding pump is to pressurize to described rewinding pump, and the pressure in described rewinding pump is more than or equal in feed pump
Pressure time, close described rewinding pump pressure balanced valve.
Step S42, after the feed pump charging performing the scheduled time, stops carrying material to feed pump.
Step S43, stops, after feed pump conveying material, performing the charging of rewinding pump, making material be fallen into rewinding pump by powder cabin.
Wherein, the charging of described execution rewinding pump includes: reduce pressure rewinding pump；Pressure in rewinding pump drops to setting value
Or after declining the setting time, open the valve between rewinding pump and powder cabin immediately, make the material in powder cabin fall into rewinding pump.
Step S44, perform the scheduled time rewinding pump charging after or detect that the high charge level signal of rewinding pump is triggered
Time, stop to rewinding transport pump material.
Wherein, for the scheduled time related in step S42 and step S44, by described feed pump and described rewinding
Being respectively provided with the first filler intervalometer in pump and the second filler intervalometer realizes, the two intervalometer is respectively used to setting and holds
The scheduled time of row feed pump charging.
Above-mentioned steps S41-S44 gives the basic step that the embodiment of the present invention carries out material feeding control, below with shown in Fig. 2
Lime stone handling system as a example by, specifically introduce material feeding control detailed process, as it is shown in figure 5, mainly comprise the steps that
Step S51, the low level signals of detection feed pump.
Step S52, when the low level signals of feed pump is triggered, rewinding pump pressure balanced valve is opened, the pressure of rewinding pump
Power will begin to ramp up.
Step S53, when the pressure in rewinding pump is more than or equal to the pressure in feed pump (such as 30kPa), rewinding pump pressure
Balanced valve cuts out, and feed pump balance dome valve is opened.
Step S54, after feed pump balance dome valve is opened, feed pump import dome valve and rewinding pump pressure balanced valve divide
Not opening, feed pump filler intervalometer (corresponding to above-mentioned first timer, such as 50 seconds) will start timing, and material will be by rewinding pump
Fall in feed pump.
Step S55, when feed pump filler intervalometer completes, rewinding pump pressure balanced valve, feed pump import dome valve and
Feed pump balanced valve cuts out respectively.
Step S56, after rewinding pump pressure balanced valve, feed pump import dome valve and feed pump balance dome valve is closed,
Rewinding pump exhaust circle overhead-valve is opened, simultaneously aerofluxus intervalometer (10 seconds), and the pressure in rewinding pump will begin to decline.
Step S57, after the pressure of rewinding pump drops below setting value (such as 20kPa) or aerofluxus timing arrives, receives
Material pump inlet dome valve is opened, and the filler intervalometer (such as 10 seconds) of short-term will start timing, and material will be fallen by the powder cabin of limestone
Enter in rewinding pump.
Step S58, completes when the stuff level switch of rewinding pump is capped or works as short-term filler intervalometer, the import of rewinding pump
Dome valve and exhaust circle overhead-valve are closed respectively.
Step S59, after the import dome valve of rewinding pump and exhaust circle overhead-valve are closed respectively, cycle reset intervalometer (such as 3s)
Timing will be started.When cycle reset intervalometer completes, filler circulation will be done.
Comparison diagram 3 and Fig. 5, in conventional material feeding control, the wadding time of limestone feed pump is that step S31 is to step S38 institute
Time, and for the present embodiment material feeding control, the feed supplement time of limestone feed pump is that step S52 is to step S55
Time, it will be apparent that shorten the feed supplement feed time of feed pump under the state of feed pump low material position.
Therefore, by the optimization of the material feeding control flow to boiler in-furnace desulfurization lime stone handling system in the present embodiment,
Can shorten the feed supplement feed time of feed pump under the state of feed pump low material position, and make full use of after feed pump supplements charging and be
The circular wait time of system, perform the rewinding pump charging step sequence that material feeding controls in step sequence in advance, shorten system charge and control step sequence
The overall circular flow time, thus ensure in time feed pump to be carried out feed supplement when the low level signals of feed pump triggers, improve
The overall conveying output capacity of lime stone handling system, it is ensured that the stability that lime stone handling system runs, thus improve
Desulfuration in furnace efficiency and reduction SO2 concentration of emission purpose, make unit generation produce more safe and environment-friendly and economical.
The identical invention thinking of material feeding control method based on the lime stone handling system corresponding with above-mentioned Fig. 4, the present invention
Embodiment also proposed the material feeding control system of a kind of lime stone handling system, and as shown in Figure 6, this material feeding control system includes:
Feed pump feed control unit 61, for detecting when the low level signals of feed pump is triggered, performs feed pump charging, makes thing
Material is fallen into feed pump by rewinding pump；Feed pump charging stop element 62, for, after the feed pump charging performing the scheduled time, stopping
Only carry material to feed pump；Feed pump feed control unit 63, for stopping after feed pump conveying material, performs immediately
Rewinding pump feeds, and makes material be fallen into rewinding pump by powder cabin；And feed pump charging stop element 64, for performing the scheduled time
Rewinding pump charging after or detect when the high charge level signal of rewinding pump is triggered, stop to rewinding transport pump material.
Wherein, in described feed pump and described rewinding pump, it is respectively provided with the first filler intervalometer and the timing of the second filler
Device, is respectively used to set the scheduled time performing feed pump charging.
Further, described feed pump feed control unit 61 includes: pressing mechanism, for rewinding pump is pressurizeed, until
Pressure in described rewinding pump is more than or equal to the pressure in feed pump；And first feeding mechanism, it is used for making feed pump top
Air return rewinding pump, and open the valve between rewinding pump and feed pump, make material in rewinding pump fall into feed pump.Its
In, described pressing mechanism preferably comprises: compressed air conveying pipeline, its opening connected on rewinding pump, is used for making compression empty
Gas enters rewinding pump to pressurize described rewinding pump；And rewinding pump pressure balanced valve, it is arranged on the conveying of described compressed air
On pipeline, it is used for controlling compressed air and enters described rewinding pump by described compressed air conveying pipeline.
Further, described rewinding pump feed control unit 63 includes: the mechanism of decompressor, for reducing pressure rewinding pump；And
Second feeding mechanism, after the pressure in rewinding pump drops to setting value or declines the setting time, opens rewinding pump and powder
Valve between storehouse, makes the material in powder cabin fall into rewinding pump.
The material feeding control system of this lime stone handling system and the material feeding control method of above-mentioned lime stone handling system
It is embodied as details identical, does not repeats them here.
Below by an application example, the material feeding that the material feeding control method of the embodiment of the present invention relates to system is described
Control to optimize application in practice.In this application example, Shenhua hundred million profit power plant's 4 × 200MW unit (#1, #2, #3, #4 unit)
Boiler uses Institute of Engineering Thernophysics, Academia Sinica and the supertension of Shanghai Boiler Plant's cooperation research and development, Natural Circulation, once
Resuperheat, balanced draft CFB (Circulating Fluidized Bed, recirculating fluidized bed) boiler, boiler model is SG-
690/13.7-M451, boiler original desulfurized limestone induction system is that Shanghai Sinofinn Electric Engineering Co., Ltd. manufactures and designs, if
Meter desulphurization system is exerted oneself as 6t/h, and every boiler is provided with 1 limestone powder bin and 1 set lime stone handling system, and limestone carries
System uses malleation dilute phase pneumatic conveying mode, and when using embodiment of the present invention scheme, lime stone handling system is entered by power plant
Go the system reform, former powder cabin has been increased gasification heating system, and it is double to be transform powder cabin feed opening as Breeches type by single feed opening
Feed opening, and respectively arrange a set of lime stone handling system exerted oneself as 15t/h at two feed openings.
In an experiment, power plant #1, #2, #3, #4 unit CFB boiler lime stone handling system is all by above-mentioned technical optimization scheme
The material feeding implementing desulfuration in furnace lime stone handling system controls to optimize, and current system normal operation, each boiler limestone is defeated
Sending system operation situation good, four boilers all can guarantee that the conveying output capacity of desulfurized limestone induction system under declared working condition,
Boiler SO2 discharge all can stably reaching standard discharge.
In sum, the material feeding control method of the embodiment of the present invention and system shorten lime stone handling system material feeding control
The circular flow time of step sequence, thus improve the overall conveying output capacity of lime stone handling system, it is ensured that the bulk devulcanization of boiler
Efficiency and environment protection standard discharge, make unit generation produce more safe and environment-friendly and economical.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
Execute the detail in mode, in the technology concept of the present invention, technical scheme can be carried out multiple letter
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy illustrates the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a material feeding control method for lime stone handling system, wherein said lime stone handling system includes the most vertical
Powder cabin, rewinding pump and the feed pump arranged, it is characterised in that described material feeding control method includes:
Detect when the low level signals of feed pump is triggered, perform feed pump charging, make material be fallen into feed pump by rewinding pump；
After the feed pump charging performing the scheduled time, stop carrying material to feed pump；
Stop, after feed pump conveying material, performing the charging of rewinding pump, making material be fallen into rewinding pump by powder cabin；And
After the rewinding pump charging performing the scheduled time or when detecting that the high charge level signal of rewinding pump is triggered, stop to rewinding
Transport pump material.
Material feeding control method the most according to claim 1, it is characterised in that the charging of described execution feed pump includes:
Rewinding pump is pressurizeed, until the pressure in described rewinding pump is more than or equal to the pressure in feed pump；And
The air making feed pump top returns rewinding pump, and opens the valve between rewinding pump and feed pump, makes thing in rewinding pump
Material falls into feed pump.
Material feeding control method the most according to claim 2, it is characterised in that described pressurize rewinding pump includes:
Rewinding pump arranges the opening connecting compressed air conveying pipeline, and receipts are set on described compressed air conveying pipeline
Material pump pressure balanced valve；And
Open described rewinding pump pressure balanced valve, allow compressed air into rewinding pump so that described rewinding pump to be pressurizeed, and described
When pressure in rewinding pump is more than or equal to the pressure in feed pump, close described rewinding pump pressure balanced valve.
Material feeding control method the most according to claim 1, it is characterised in that divide in described feed pump and described rewinding pump
First filler intervalometer and the second filler intervalometer are not set, are respectively used to set the scheduled time performing feed pump charging.
Material feeding control method the most according to claim 1, it is characterised in that the charging of described execution rewinding pump includes:
Rewinding pump is reduced pressure；And
After pressure in rewinding pump drops to setting value or declines the setting time, open the valve between rewinding pump and powder cabin,
The material in powder cabin is made to fall into rewinding pump.
6. a material feeding control system for lime stone handling system, wherein said lime stone handling system includes the most vertical
Powder cabin, rewinding pump and the feed pump arranged, it is characterised in that described material feeding control system includes:
Feed pump feed control unit, for detecting when the low level signals of feed pump is triggered, performs feed pump charging, makes
Material is fallen into feed pump by rewinding pump；
Feed pump charging stop element, for after the feed pump charging performing the scheduled time, stops carrying material to feed pump；
Feed pump feed control unit, for stopping after feed pump conveying material, performs the charging of rewinding pump, makes material by powder
Storehouse falls into rewinding pump；And
Feed pump charging stop element, is used for after the rewinding pump charging performing the scheduled time or detects the high charge level of rewinding pump
When signal is triggered, stop to rewinding transport pump material.
Material feeding control system the most according to claim 6, it is characterised in that described feed pump feed control unit includes:
Pressing mechanism, for pressurizeing to rewinding pump, until the pressure in described rewinding pump is more than or equal to the pressure in feed pump；
And
First feeding mechanism, for making the air on feed pump top return rewinding pump, and opens between rewinding pump and feed pump
Valve, makes material in rewinding pump fall into feed pump.
Material feeding control system the most according to claim 7, it is characterised in that described pressing mechanism includes:
Compressed air conveying pipeline, its opening connected on rewinding pump, it is used for allowing compressed air into rewinding pump with to described receipts
Material pump pressurization；And
Rewinding pump pressure balanced valve, it is arranged on described compressed air conveying pipeline, is used for controlling compressed air by described
Compressed air conveying pipeline enters described rewinding pump.
Material feeding control system the most according to claim 6, it is characterised in that divide in described feed pump and described rewinding pump
First filler intervalometer and the second filler intervalometer are not set, are respectively used to set the scheduled time performing feed pump charging.
Material feeding control system the most according to claim 6, it is characterised in that described rewinding pump feed control unit includes:
The mechanism of decompressor, for reducing pressure to rewinding pump；And
Second feeding mechanism, after the pressure in rewinding pump drops to setting value or declines the setting time, opens rewinding pump
And the valve between powder cabin, makes the material in powder cabin fall into rewinding pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610772526.0A CN106237830A (en) | 2016-08-30 | 2016-08-30 | The material feeding control method of a kind of lime stone handling system and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610772526.0A CN106237830A (en) | 2016-08-30 | 2016-08-30 | The material feeding control method of a kind of lime stone handling system and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106237830A true CN106237830A (en) | 2016-12-21 |
Family
ID=58079567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610772526.0A Pending CN106237830A (en) | 2016-08-30 | 2016-08-30 | The material feeding control method of a kind of lime stone handling system and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106237830A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107854966A (en) * | 2017-11-20 | 2018-03-30 | 深圳东方锅炉控制有限公司 | A kind of method and system for improving high basic metal coal and staiing coking |
| CN109519955A (en) * | 2018-12-03 | 2019-03-26 | 中国华电科工集团有限公司 | Coal-fired power plant B of Unit IM system |
| CN110155626A (en) * | 2019-05-17 | 2019-08-23 | 山信软件股份有限公司 | Oscillating feeder feeding control method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19858675A1 (en) * | 1998-07-27 | 2000-02-24 | Patentstelle Fuer Die Deutsche | Cleaning of hot gases comprises adsorbing alkaline and other pollutants on injected particles which are removed for further treatment and recycling |
| CN102756920A (en) * | 2012-07-30 | 2012-10-31 | 巨石集团有限公司 | Continuous dense-phase positive-pressure pneumatic conveying apparatus and conveying method |
| CN202609580U (en) * | 2012-05-25 | 2012-12-19 | 天津市实达电力设备有限公司 | Up-and-down underfeed type high-output continuous delivery pump |
| CN102974211A (en) * | 2012-11-06 | 2013-03-20 | 镇江市电站辅机厂有限公司 | Circulating fluidized bed boiler in-furnace desulfurization device |
| CN203187097U (en) * | 2013-03-12 | 2013-09-11 | 上海题桥能源科技发展有限公司 | Coal dust pneumatic transmission system |
-
2016
- 2016-08-30 CN CN201610772526.0A patent/CN106237830A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19858675A1 (en) * | 1998-07-27 | 2000-02-24 | Patentstelle Fuer Die Deutsche | Cleaning of hot gases comprises adsorbing alkaline and other pollutants on injected particles which are removed for further treatment and recycling |
| CN202609580U (en) * | 2012-05-25 | 2012-12-19 | 天津市实达电力设备有限公司 | Up-and-down underfeed type high-output continuous delivery pump |
| CN102756920A (en) * | 2012-07-30 | 2012-10-31 | 巨石集团有限公司 | Continuous dense-phase positive-pressure pneumatic conveying apparatus and conveying method |
| CN102974211A (en) * | 2012-11-06 | 2013-03-20 | 镇江市电站辅机厂有限公司 | Circulating fluidized bed boiler in-furnace desulfurization device |
| CN203187097U (en) * | 2013-03-12 | 2013-09-11 | 上海题桥能源科技发展有限公司 | Coal dust pneumatic transmission system |
Non-Patent Citations (1)
| Title |
|---|
| 杨国才: "《 闪速炼铜工艺与控制》", 31 December 2010, 中南大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107854966A (en) * | 2017-11-20 | 2018-03-30 | 深圳东方锅炉控制有限公司 | A kind of method and system for improving high basic metal coal and staiing coking |
| CN109519955A (en) * | 2018-12-03 | 2019-03-26 | 中国华电科工集团有限公司 | Coal-fired power plant B of Unit IM system |
| CN110155626A (en) * | 2019-05-17 | 2019-08-23 | 山信软件股份有限公司 | Oscillating feeder feeding control method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106237830A (en) | The material feeding control method of a kind of lime stone handling system and system | |
| CN105983297B (en) | A kind of coal fired power plant flying dust adsorbent integration is modified and sprays demercuration system | |
| CN103682396B (en) | Hydrogen management method when fuel-cell vehicle hydrogen-feeding system quits work | |
| CN203187097U (en) | Coal dust pneumatic transmission system | |
| CN102974211A (en) | Circulating fluidized bed boiler in-furnace desulfurization device | |
| CN103215078B (en) | Pressurizing and decompressing process for coal lock by utilizing byproduct carbon dioxide gas and coaling system | |
| CN202575416U (en) | Pneumatic transmission and blast furnace injection device for coke oven fly ash | |
| CN103303681A (en) | Pulverized coal pressure transmission system and process | |
| CN103144965A (en) | Powdered coal pneumatic conveying system and powdered coal pneumatic conveying method | |
| CN215325733U (en) | Coal fired power plant fly ash conveying system | |
| CN106906005A (en) | Pulverized coal pressurized conveying device and method | |
| CN208671037U (en) | A kind of Rear of Utility Boiler fume duct fly ash collection system | |
| CN203082866U (en) | Fluid-reconstruction-based circulating fluidized bed boiler capable of controlling nitrogen oxide | |
| CN202733885U (en) | Starting bed material loading device of circulating fluidized bed | |
| CN201254554Y (en) | Gasifying stove with automatic feeding apparatus | |
| CN103272475B (en) | The desulphurization system of CFBB | |
| CN203346345U (en) | Coaling system utilizing byproduct carbon dioxide gas to perform pressure charging and relief on coal locks | |
| CN103075728A (en) | Flow-reconstruction based circulating fluidized bed boiler for controlling nitric oxide | |
| CN203309891U (en) | Desulfurization system of circulating fluidized bed boiler | |
| CN202744007U (en) | Vertically-arranged upward-feed type high-output continuous conveying pump | |
| CN202272507U (en) | Long-distance and high-output continuous delivery pump | |
| CN202893181U (en) | Desulphurization device in circulating fluidized bed boiler | |
| JP4646290B2 (en) | Operation control system and method for thermal power plant | |
| CN102210971A (en) | Circulating fluidized bed boiler desulfurizer | |
| JP5465747B2 (en) | Start-up method of pressurized fluidized bed combined power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161221 |