CN101972696A - Production system of desulfurized limestone powder in circulating fluidized bed (CFB) boiler - Google Patents
Production system of desulfurized limestone powder in circulating fluidized bed (CFB) boiler Download PDFInfo
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- CN101972696A CN101972696A CN201010266053XA CN201010266053A CN101972696A CN 101972696 A CN101972696 A CN 101972696A CN 201010266053X A CN201010266053X A CN 201010266053XA CN 201010266053 A CN201010266053 A CN 201010266053A CN 101972696 A CN101972696 A CN 101972696A
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- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The invention discloses a production system of desulfurized limestone powder in a circulating fluidized bed (CFB) boiler, comprising a grinding system, a winnowing powder system, a pneumatic conveying system and an automatic control system. According to the equipment for producing powder by column mill, which is used by the production system, the continuous repeated intermediate-speed and intermediate-pressure rolling grinding and crushing principle is used; the crushing and winnowing mode of the raw material is preferably suitable for producing products with intermediate granularity; and the granularity distribution of the products meets the requirement of an Ahlstrom curve. The powder is conveyed by adopting a pneumatic conveying mode with closed system and environment-friendly conditions, so that the production environment is improved and the quality of the products is ensured. The whole process PLC (Programmable Logic Controller) control is used for the production and operation to realize the target for unmanned operation in situ. The production system has originated configuration in the state, provides a complete, advanced, economic and reasonable method for processing a desulfurizing agent to desulfurize a large amount of CFB boilers in the state and can be widely used for manufacturers requiring intermediate-granularity powder in other fields.
Description
Technical field
The invention belongs to desulphurizer of boiler, particularly a kind of production system of recirculating fluidized bed CFB boiler in-furnace desulfurization agstone.
Background technology
The standard increasingly stringent of present domestic energy-saving and emission-reduction, many CFB boilers that use sulphur coal, high sulfur petroleum coke have all had new requirements at the higher level to desulfuration in furnace, require the particle diameter distribution of agstone will meet this dragon curve requirement difficult to understand, and the limestone desulfurizer of present domestic fuel pulverizing plant production was not slightly to be exactly meticulous.Have this difficult problem, as newly-built three abilities of Tianjin Petrochemical Company be 420 tons/time, the HTHP CFBB of burning high sulfur petroleum coke (be called for short CFB boiler).This type boiler has strict requirement to the lime stone powder size distribution of serving as desulfurizing agent, must meet this dragon curve (referring to accompanying drawing 8) difficult to understand.This is the boiler of a kind of requirement than the microlith limestone flour, and its particle size range is 0～1mm, middle footpath d50=0.15mm.In view of powder granularity is big more, its specific area is more little, and desulfurized effect is poor more, and therefore, the ratio of d＞0.5mm will be lacked in the finished product; And in order to prevent that powder from being taken away by gas stream in the stove, the ratio of d＜0.1mm also will be controlled in the finished product.The powder desulfurized effect of d=0.125mm～0.25mm is best in theory, and these harsh requirements are brought great difficulty to lime stone powder process production, and production capacity is very restricted.
At present in the powder manufacturing apparatus of domestic production limestone desulfurizer powder: a class such as vertical mill, Raymond mill etc., adopt the middling speed high pressure to pulverize and the rotor selection by winnowing, the powder granularity of producing very thin (particle size range 0～0.08mm, middle footpath d50=0.035mm) is suitable for stove foreign cigarette qi exhaustion sulphur and uses.And another kind of powder manufacturing apparatus such as hammer mill, twin rollers, adopt the broken and vibratory sieve sorting of bump, the powder granularity of producing is thick (particle size range 0～2mm, middle footpath d50=0.45mm), and being suitable for the requirement powder is the boiler use that the whist dimension is reined in curve (referring to accompanying drawing 9).The lime stone powder size distribution of these device fabrications is all bigger with this dragon curve deviation difficult to understand.Be not suitable for the strict demand that the CFB boiler in-furnace desulfurization distributes to powder granularity.
Summary of the invention
Technical problem to be solved by this invention is: the production system that a kind of recirculating fluidized bed CFB boiler in-furnace desulfurization agstone is provided.Address the above problem.
Technical scheme of the present invention is:
A kind of production system of recirculating fluidized bed CFB boiler in-furnace desulfurization agstone is characterized in that: air-transport system and PLC robot control system(RCS) by powder grinding system, winnowing powder system, powder are formed;
Powder grinding system wherein: have under former feed bin (1) lower discharge port of expecting electro-vibrating feeder (2) is set, the electro-vibrating feeder below is that below, belted electronic balance (3) belted electronic balance end is the import of batch mixing bucket (5) top, the batch mixing bucket is outlet joint pin grinding machine down, column mill below discharging opening has discharging elephant trunk (6), and discharging elephant trunk end connects bucket elevator (7); Bucket elevator output end connects the winnowing powder system;
The winnowing powder system:
The outlet of bucket elevator connects waterfall stream powder concentrator, and the outlet of the powder delivery housing of waterfall stream powder concentrator connects the upside import of bispin wind separator, and bispin wind separator lower end is the meal outlet; The feed back stream pipe of waterfall stream powder concentrator below connects the import of batch mixing bucket; The circulating fan air outlet connects the inlet shell of waterfall stream powder concentrator, and the gas outlet of the upper end of cyclone separator connects the circulating fan air inlet; Dust outlet on the bispin wind separator connects bagroom; The bagroom below is the fine powder outlet;
The air-transport system of powder: two meal outlets of bispin wind separator lower end respectively connect a NPD2000/200 type transmitter, the outlet of NPD2000/200 type transmitter connects meal finished product case upper end charging aperture, meal finished product case bottom discharging opening connects the measuring chute upper inlet, and measuring chute outlet down connects transmitter; The discharging opening of bagroom below connects T type transmitter, and the outlet of T type transmitter connects fine powder finished product case upper end charging aperture, and fine powder finished product case bottom discharging opening connects the measuring chute upper inlet, and measuring chute outlet down connects transmitter.
The control system of the production system of described CFB boiler in-furnace desulfurization agstone is the PLC robot control system(RCS): system is made up of host computer and slave computer two large divisions, host computer is two PCs, two PCs connect a switch, switch connects EPA and carries out communication, and Ethernet advances to connect slave computer: pulverized coal preparation system and defeated powder system;
Pulverized coal preparation system comprises that a CPU main frame connects 5 ET200M stations, forms with modular distributed I/O.
Effect of the present invention is:
The rolling compaction pulverization principle that the post powder-grinding equipment that uses adopts continuously repeatedly, press in the middling speed, its raw material pulverizing and winnowing powder mode are suitable for producing medium-grained product most, and Granularity Distribution meets this dragon curve requirement difficult to understand.On powder conveying, select the pneumatic conveying mode that system is airtight, the environmental protection bar is good for use, improved production environment, guaranteed product quality.In production operation, adopt omnidistance PLC control, realized on-the-spot operatorless target.This cover desulfurizing agent production system configuration still belongs to initiative at home, and the production desulfurizing agent method of a complete advanced person, economical rationality is provided for domestic a large amount of newly-built CFB boiler in-furnace desulfurizations.Also can be widely used in the manufacturer of other field demand medium size powder.
1, the limestone desulfurizer at present domestic fuel pulverizing plant production was not slightly to be exactly meticulous present situation, the present invention will provide a kind of post powder-grinding to add the novel combinations produce mode of waterfall stream winnowing powder, its product cut size is 0～1mm, d50=0.09～0.2mm, meets this dragon curve requirement difficult to understand substantially.For improving desulfuration efficiency, the ratio of particle diameter d＜0.5mm will reach more than 95%; Run off for reducing powder, the composition of particle diameter d＜0.1mm will be controlled at below 30～40%.
2, the air-transport system of a kind of big ability (25 tons/time), long distance (230 meters), not plugging on carrying, the powder I and II is provided.Overcome at present on agstone is carried, use less, ability is low, distance is short, the present situation of easy plugging.
3, be production whole process design one cover PLC robot control system(RCS), manual operations is exempted from the scene, and all adjustment, operation and monitoring are finished at Central Control Room.
The production desulfurizing agent method of a complete advanced person, economical rationality is provided for domestic a large amount of newly-built CFB boiler in-furnace desulfurizations.
The invention provides the novel mode of production that a kind of post powder-grinding adds waterfall stream winnowing powder, this reasonably makes up and makes it be suitable for producing medium-grained product most, the powder granularity scope is 0～1mm, wherein the ratio of d＞0.5mm can be controlled in 5%, and middle footpath d50 can be regulated and control between 0.09～0.2mm that this dragon curve difficult to understand requires very easily.This production technology for high-efficiency desulfurization in the CFB boiler stove provides optimal agstone, also can be widely used in the manufacturer of other field demand medium size powder.
Description of drawings
Fig. 1 is the powder grinding system figure of the production system of recirculating fluidized bed CFB boiler in-furnace desulfurization agstone
Fig. 2 is the column mill structure chart
Fig. 3 is the winnowing powder system figure of the production system of recirculating fluidized bed CFB boiler in-furnace desulfurization agstone
Fig. 4 is the powder air-transport system figure of the production system of recirculating fluidized bed CFB boiler in-furnace desulfurization agstone
Fig. 5 .1 is a pick-up metal thing discharger modular construction schematic diagram
Fig. 5 .2 is a pick-up metal thing discharger modular construction schematic diagram
Fig. 6 is a NPD2000/200 type transmitter syndeton structural representation
Fig. 7 is a PLC control system block diagram
Fig. 8 is limestone desulfurization powder level configuration this dragon curve figure difficult to understand
Fig. 9 is that limestone desulfurization powder level configuration whist dimension is reined in curve map
The specific embodiment
The present invention relates to a kind of agstone production system that is exclusively used in recirculating fluidized bed CFB boiler in-furnace desulfurization.
A kind of agstone production system that is exclusively used in desulfuration in furnace.This desulfurizing agent production system configuration still belongs to initiative at home, comprises powder grinding system, winnowing powder system, air-transport system and robot control system(RCS).
Column mill walks to expect that direction is last charging, bottom discharge, and the rolling compaction pulverization principle that adopts continuously repeatedly, presses in the middling speed is pulverized raw material.The adjustment of smashing fineness is by column mill gap, discharge barrel height and the isoparametric adjustment of spring length are realized.The raw meal particle size of being milled out is moderate, and washability is strong.
Winnowing powder mode is for flowing down material, the classification that blows side from top waterfall, through cyclone separator to the product gas solid separation.Can will select the powder degree to be controlled at desired d=0～1mm, d50=0.09～0.2mm by adjusting methods such as electric machine frequency.For guaranteeing the system vacuum degree, 1/2～1/3 of air circulation is extracted out from the circulated air pipeline.
Add discharge port on the feed back elephant trunk of winnowing powder system, be used for the metal object that the scavenge system material is sneaked into.
Agstone carry adopted ability be 25 tons/time, distance is 230 meters pneumatic conveying mode.Used the plugging technique that blows that state-of-the-art low pressure mass flow technique and back suction just blowing in the conveying.
A large amount of fine powders (400 order) of during agstone is carried bagroom being collected are not used further to desulfuration in furnace; But it is imported the fine powder finished bin separately, be used for stove foreign cigarette qi exhaustion sulphur.
The production whole process has designed a cover PLC robot control system(RCS), and manual operations is exempted from the scene, all adjusts, operates and monitor and finish at Central Control Room.
The rolling compaction pulverization principle that the powder manufacturing apparatus column mill that this patent adopts adopts continuously repeatedly, press in the middling speed is pulverized raw material, and selecting the powder mode is that waterfall flows down material, classification blows side.Its pulverizing and hierarchical approaches make it be suitable for producing medium-grained product most, the powder granularity scope is 0～1mm, wherein the ratio of d＞0.5mm can be controlled in 5%, and middle footpath d50 can be regulated and control between 0.09～0.2mm that this dragon curve difficult to understand requires very easily.
At present domestic mechanical mode of movements such as adopt that scraper plates and bucket are carried on the lime stone powder is carried take up an area of greatly more, and production environment is poor.And in the pneumatic conveying mode that begins to adopt, the ability that exists again low (generally 10～20 tons/time), distance nearly (generally about 100 meters), the easy problem of plugging.The production route that this patent is designed, the pneumatic conveying mode of the big capacity of whole process using, long distance has improved production environment on the powder I and II is carried, and has guaranteed product quality.
This patent has designed a cover PLC robot control system(RCS) for the production whole process, and scene nothing manual operations is all adjusted, operated and monitors and finish at Central Control Room, has improved the work bar, has improved managerial skills.
(1), powder grinding system
1, the production procedure of column mill powder process is (referring to an accompanying drawing 1):
Building stones enter column mill from former feed bin (1) outflow through electro-vibrating feeder (2), belted electronic balance (3), batch mixing bucket (5) and begin to roll pulverizing.Material after the pulverizing is from the automatic discharging in the bottom of grinding machine, and the elevating hopper by deadweight bucket elevator (7) in discharging elephant trunk (6) inflow melt pit promotes laggard selected powder operation through bucket elevator.
The effect of electro-vibrating feeder is the step-less adjustment feeding coal in the flow process.The effect of belted electronic balance is that continuous automatically demonstration charging is weighed.The effect of batch mixing bucket is that the particle that raw material that belt feeder is sent here and powder concentrator return mixes back displacement pile grinding machine.The post that how much depends on of whole feed system material loading amount grinds the current of electric size and comes automatic control and adjustment by the PLC system.
2, column mill (referring to accompanying drawing 2) has adopted and has pressed the principle that rolls repeatedly in the middling speed.This machine top transmission mechanism 2.1 drives main shaft 2.2 rotations, the material 2.3 that enters from top forms the bed of material at running roller 2.4 and 2.5 of liner plates, under the pressure of spring assembly 2.6, running roller is done tens of flexible extruding and is made the material powdered on the bed of material, obtain from discharging opening 2.7, the raw meal particle size of being milled out is moderate, is irregular many rhombuses, and desulfurized effect is very good.
3, for making product granularity meet this dragon curve requirement difficult to understand, want timing sampling to detect granularity in the production, and the column mill parameter made following adjustment: (1). regulate gap between running roller and the liner plate changing the product particle size, gap smaller, the largest particles also suitably diminishes.(2). adjust the height of foot discharge barrel fall way (7), move on the fall way, granularity diminishes.(3) suitably adjust the pressure of spring (6) according to material hardness.
(2), winnowing powder system
1, the production procedure of post grinding system winnowing powder is (referring to an accompanying drawing 3):
From charging aperture 3.4 feeding waterfall stream powder concentrators 3.7, material is by selecting powder housing 3.8 from focusing on to break up evenly to fall to entering on the grid 3.6 through elevator for material after the pulverizing.Simultaneously, because the draft effect of circulating fan 3.3 makes waterfall flow and is negative pressure state in the powder concentrator 3.7.The air-flow that sucks from air inlet 3.1 is through inlet shell 3.2, passes to break up grid and the material on it and powder delivery housing 3.10 backs of flowing through are discharged from air outlet 3.11.Selecting realization thickness separation in the powder housing at material under the effect of air-flow, the thinner powder of granularity is discharged from air outlet with air-flow and is entered cyclone separator 3.12; And the excessive powder of particle is discharged from the bottom discharging opening under the gravity effect, returns blending bunker through feed back elephant trunk 3.9, the reprocessing of reentry column mill.
What the air-flow that enters cyclone separator 3.12 separated that the back discharges from the bottom through solid, gas is the qualified product of granularity.
For guaranteeing the system vacuum degree, on the circulated air pipeline, install suction opeing additional in 2 meters of circulating fan air outlet, 1/2～1/3 of air circulation to be extracted out, the wind of extraction enters atmosphere after bagroom 3.13 dedustings.The fine powder of collecting can be used for stove foreign cigarette qi exhaustion sulphur.
2, for making product granularity meet this dragon curve requirement difficult to understand, want timing sampling to detect granularity in the production, and to selecting each parameter of powder system to do following adjustment: (1). when needs increase powder granularity, need to increase the circulating fan electric machine frequency, to improve the blower fan revolution, strengthen air quantity, vice versa.(2). when needs increase powder granularity, need to increase the air inlet aperture, to strengthen air quantity, vice versa.(3). regulate the aperture of seven air regulating boards (5) of waterfall stream powder concentrator (7), change the distribution of air-flow in powder concentrator, thereby reach the effect (be top 2 complete shut-downs at present, below 5 standard-sized sheets) of control powder granularity.
3, to the processing (referring to accompanying drawing 5.1,5.2) of pick-up metal thing:
In case the pick-up metal thing will damage column mill in the material, must go out clearly immediately.The present invention has added discharge port 5.2 on feed back elephant trunk 5.1, method of operating is opened discharge port end cap 5.3 after stopping, load onto the dump skip 5.4 of band plate washer, start bucket elevator and column mill material in the system all is discharged to second floor, after finding out metal object, material is added the column mill batch mixing bucket that is positioned at second floor nearby, then discharge port is added upper end cover again, just can normally drive again.
(3), the air-transport system of powder
1, powder pneumatic conveying process flow process (referring to accompanying drawing 4) is:
The strength of powder is carried and is adopted the advanced in the world at present following formula malleation dense phase pneumatic conveying system that draws.
The technological process of indoor one-level induction system 4.3 is: divide into two cover NPD2000/200 type transmitters 4.2 at the bispin wind separator 4.1 of post powder-grinding winnowing powder system, whenever apply mechanically a DN125 pipeline agstone is transported to meal finished bin 4.8; Dividing into three cover T200/200 type transmitters 4.5, per three at the bagroom 4.4 of post powder-grinding winnowing powder system applies mechanically a DN100 pipeline agstone is transported to fine powder finished bin 4.7.
4.6 technological processes of outdoor two-stage conveying system are: the meal finished bin is divided into the NPD2000/200 type transmitter of two cover band measuring chutes 4.9, whenever applies mechanically a DN125 pipeline agstone is transported to power plant's intermediate bin, is used for the CFB boiler in-furnace desulfurization; With tank car agstone is transported to power plant under the fine powder finished bin, is used for boiler stove foreign cigarette qi exhaustion sulphur.
All be equipped with on every feed-line and blow stifled valve group.
System's single line conveying capacity be 25 tons/time, the longest fed distance is that 230 meters of levels add vertical 30 meters.
2, the low pressure mass flow technique and anti-blocking, blow plugging technique (referring to accompanying drawing 6)
Plugging is the main difficult problem that the agstone strength is carried in the conveying, also is the main cause that restricting current improves agstone conveying capacity and fed distance.The present invention uses the NPD transmitter in conveying, adopted state-of-the-art low pressure mass flow technique in the programming.As shown in Figure 6, during defeated ash beginning, when sending warehouse 6.1 internal pressures rose to 0.1MPa, program was opened aeration valve 6.4 and bleeder valve 6.6 automatically with the formation winding-up that builds the pressure; In the conveying, cause plugging for avoiding hypertonia, programming send grey pressure strictness to be limited between 0.22～0.3MPa pipeline by opening, stop intake valve 6.2 and fluidisation valve 6.3 repeatedly automatically; During end-of-job, take to build the pressure purges pipeline purging, prevents the plugging of the dust stratification moisture absorption.Owing to adopted above conveying technology, pernicious plugging accident never takes place in operation in this device over one year.
Another measure that prevents pernicious plugging is the criterion of rationally formulating plugging.One has the symptom of a trend, handles immediately, avoids the overlong time, the pressure that block up excessive, and stifled mistake is dead and blow not open.We conclude that the standard of plugging is time of delivery 〉=5 minute, and defeated grey pressure 〉=0.4MPa promptly begins to report to the police, and blows stifled immediately.
Blowing stifled basic skills is that back suction just blows, hocket repeatedly, until blow logical till.Back suction makes pipeline pressure be brought down below 0.01MPa for opening unimpeded valve (6.5); Just blowing for feed time is changed and be made as 0, system resets, and blows material by starting the knob malleation then.Blow the blow line that to build the pressure behind the bridging bundle.
3, superfine powder is separated (referring to accompanying drawing 4) with desulfuration in furnace with powder
This dragon curve difficult to understand requires the shared ratio of particle diameter d＜0.1mm to lack, and the powder particle size that bagroom is collected is below 0.044mm, is very easily taken away by air-flow when desulfuration in furnace and loses efficacy.We no longer squeeze into the meal finished bin that is used for the CFB boiler in-furnace desulfurization to the fine powder that bagroom is collected in the design of powder strength landline for this reason, change into directly squeezing into the fine powder finished bin and being used for stove foreign cigarette qi exhaustion sulphur.This change has at first reduced 3～5% with desulfuration in furnace with the superfine powder proportion of poor effect in the powder; Use instead simultaneously behind stove foreign cigarette qi exhaustion sulphur, improved the overall income of factory.
4, externally install automatic weighing system (referring to 4.9 in the accompanying drawing 4) additional on the air-transport system, can measure the agstone body weight of transporting to the CFB boiler accurately, easily.Weighing system possesses automatic gauge, automatically record, multi-functional such as add up automatically.
(4), fuel pulverizing plant PLC robot control system(RCS)
This device control mode is to carry out instrument electricity centralized Control at Central Control Room, and control system adopts the PLC programmable control system.
1, the major function of PLC robot control system(RCS)
(1), powder process and the production of selecting powder are from the lime stone intermediate bunker, select powder, strength to carry, be automatic control through electro-vibrating feeder, ribbon conveyer, flour mill, classification, need not manual intervention under the normal condition until whole production procedures of delivering to the CFB of power plant boiler.Operating personnel, monitor the material level of finished bin simultaneously, and carry out communication with the DCS master control system of the CFB of power plant based on the operating terminal of PLC, by LCD picture and keyboard the whole production flow process is monitored control at instrument electricity centralized control room.Sequential is programmed for contrary technological process and starts, and shuts down along technological process, and it is adjustable to start blanking time.All produce in the indoor realization equipment start-stop of instrument electricity centralized Control, operating condition supervision and adjustment and accident treatment.
(2), in PLC, be provided with necessary protection and blocking function, equipment has technology interlock protection function in system's running; To guarantee the safe operation of whole process system.
Fuel pulverizing plant under Interlock Status, a certain device fails in the system, PLC can stop and reports to the police all devices before the system of faulty equipment place is anxious, equipment does not afterwards stop and continues to walk material.Pneumatic conveyer is under " program control " state, and a certain device fails or operational factor occur unusually in the system, and control system can be reported to the police, and by logic chart cover blow off in a week behind system's material stock out of service automatically.
Faulty equipment except that the acousto-optic demonstration is arranged, shows the fault particular content in upper left side " fault block " in picture.
(3), login " system monitoring " picture, can watch at any time current of electric, motor temperature, bearing temperature, belt material conveying amount, strength transportation parameters, the time running status such as real pressure curve, bin-level; Login " historical trend ", picture will show the main information record of operation previous stage; . login " the historical warning ", picture will show all previous fault alarm record.
2, the design of PLC robot control system(RCS) (referring to accompanying drawing 7)
As shown in Figure 7, whole PLC system is made up of host computer and slave computer two large divisions, is connected by a switch 7.2 and uses EPA to carry out communication.Wherein host computer comprises two PC7.1 and a laser printer 7.3, acting as of PC played functions such as monitoring, warning and programming to whole production and defeated powder system, wherein a PC uses as the engineer station, can carry out modification of program to system, another PC uses as active station, except that can not making amendment to program, function is identical with last PC, and two PC are in operation can be standby each other; Host computer uses WinCC V6.2 soft as configuration, uses STEP7V5.4 soft as programming.
Slave computer can be divided into pulverized coal preparation system 7.5 again and defeated powder system 7.6 two parts are formed, it now is the example explanation with the pulverized coal preparation system, comprise a CPU mainframe and 5 ET200M station (modular distributed Is/O) form in the system, the CPU mainframe comprises one of Siemens S7 300 315-2DP, be connected with switch by CP 343-1 ethernet module host computer is carried out communication, and use MODBUS communications protocol and column mill kilowatt-hour meter to carry out communication by the CP341 serial port module, 5 ET200M station uses the PROFIBUS fieldbus to be connected the realization communication with DP interface on the CPU by the IM153-1 interface module, each station can connect 8 I/O modules at most, this project system powder system uses 17 16 road DI modules altogether, 10 16 road DO modules, 88 road AI modules, the I/O number of spots is: DI272, DO160, AI32, RTD32.The pulverized coal preparation system slave computer is by totally 4 the Siemens 24VDC 10A redundant power power supplies of two covers.
Claims (2)
1. the production system of a recirculating fluidized bed CFB boiler in-furnace desulfurization agstone, it is characterized in that: air-transport system and PLC robot control system(RCS) by powder grinding system, winnowing powder system, powder are formed;
Powder grinding system wherein: have under former feed bin (1) lower discharge port of expecting electro-vibrating feeder (2) is set, the electro-vibrating feeder below is that below, belted electronic balance (3) belted electronic balance end is the import of batch mixing bucket (5) top, the batch mixing bucket is outlet joint pin grinding machine down, column mill below discharging opening has discharging elephant trunk (6), and discharging elephant trunk end connects bucket elevator (7); Bucket elevator output end connects the winnowing powder system;
The winnowing powder system:
The outlet of bucket elevator connects waterfall stream powder concentrator, and the outlet of the powder delivery housing of waterfall stream powder concentrator connects the upside import of bispin wind separator, and bispin wind separator lower end is the meal outlet; The feed back stream pipe of waterfall stream powder concentrator below connects the import of batch mixing bucket; The circulating fan air outlet connects the inlet shell of waterfall stream powder concentrator, and the gas outlet of the upper end of cyclone separator connects the circulating fan air inlet; Dust outlet on the bispin wind separator connects bagroom; The bagroom below is the fine powder outlet;
The air-transport system of powder: two meal outlets of bispin wind separator lower end respectively connect a NPD2000/200 type transmitter, the outlet of NPD2000/200 type transmitter connects meal finished product case upper end charging aperture, meal finished product case bottom discharging opening connects the measuring chute upper inlet, and measuring chute outlet down connects transmitter; The discharging opening of bagroom below connects T type transmitter, and the outlet of T type transmitter connects fine powder finished product case upper end charging aperture, and fine powder finished product case bottom discharging opening connects the measuring chute upper inlet, and measuring chute outlet down connects transmitter.
2. the production system of recirculating fluidized bed CFB boiler in-furnace desulfurization agstone according to claim 1, it is characterized in that: control system is the PLC robot control system(RCS): system is made up of host computer and slave computer two large divisions, host computer is two PCs, two PCs connect a switch, switch connects EPA and carries out communication, and Ethernet advances to connect slave computer: pulverized coal preparation system and defeated powder system;
Pulverized coal preparation system comprises that a CPU main frame connects 5 ET200M stations, forms with modular distributed I/O.
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| CN102169333A (en) * | 2011-03-10 | 2011-08-31 | 宁波市联成机械有限责任公司 | Automatic control system of milling system |
| CN102755986A (en) * | 2012-07-31 | 2012-10-31 | 王成新 | Process of manufacturing high-efficiency, energy-saving and environment-friendly desulfurized calcium powder by utilizing stone leftover material |
| CN103521333A (en) * | 2013-09-29 | 2014-01-22 | 长沙深湘通用机器有限公司 | Smashing and two-stage sorting process and system |
| CN103611616A (en) * | 2013-11-25 | 2014-03-05 | 镇江市电站辅机厂有限公司 | Lime stone milling system |
| CN113731561A (en) * | 2021-09-17 | 2021-12-03 | 湖南华杰机械设备有限公司 | Powder making process method and powder making system for desulfurized limestone |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102169333A (en) * | 2011-03-10 | 2011-08-31 | 宁波市联成机械有限责任公司 | Automatic control system of milling system |
| CN102755986A (en) * | 2012-07-31 | 2012-10-31 | 王成新 | Process of manufacturing high-efficiency, energy-saving and environment-friendly desulfurized calcium powder by utilizing stone leftover material |
| CN102755986B (en) * | 2012-07-31 | 2015-04-08 | 王成新 | Process of manufacturing high-efficiency, energy-saving and environment-friendly desulfurized calcium powder by utilizing stone leftover material |
| CN103521333A (en) * | 2013-09-29 | 2014-01-22 | 长沙深湘通用机器有限公司 | Smashing and two-stage sorting process and system |
| CN103521333B (en) * | 2013-09-29 | 2015-08-26 | 长沙深湘通用机器有限公司 | A kind of to pulverize and two-stage sorting process and pulverizing and two-stage separation system |
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| CN113731561A (en) * | 2021-09-17 | 2021-12-03 | 湖南华杰机械设备有限公司 | Powder making process method and powder making system for desulfurized limestone |
| CN113731561B (en) * | 2021-09-17 | 2023-01-24 | 湖南华杰机械设备有限公司 | Powder making process method and powder making system for desulfurized limestone |
| CN117023155A (en) * | 2023-10-08 | 2023-11-10 | 常州常衡德宇粉体集成系统有限公司 | Powder positive pressure conveying system and conveying method |
| CN117023155B (en) * | 2023-10-08 | 2023-12-12 | 常州常衡德宇粉体集成系统有限公司 | Powder positive pressure conveying system and conveying method |
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