CN104773509B - Fluidization parallel connection storehouse pump induction system and method - Google Patents

Fluidization parallel connection storehouse pump induction system and method Download PDF

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Publication number
CN104773509B
CN104773509B CN201510170972.XA CN201510170972A CN104773509B CN 104773509 B CN104773509 B CN 104773509B CN 201510170972 A CN201510170972 A CN 201510170972A CN 104773509 B CN104773509 B CN 104773509B
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valve
storehouse pump
conveying
storehouse
pump
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CN104773509A (en
Inventor
陆小成
金定强
申智勇
袁春林
沈祥云
庄柯
李志强
叶毅科
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Guodian Environmental Protection Research Institute Co Ltd
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State Power Environmental Protection Research Institute
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Abstract

The present invention discloses a kind of fluidization parallel connection storehouse pump induction system and method, system solves the problem the problem of the difficult conveying of coarse granule flyash, improves transfer efficiency, and system is reliable and stable.The method high-efficiency and economic when conventional granulates are conveyed.Fluidization parallel connection storehouse pump induction system, the system includes multiple supply units in parallel, and each supply unit includes 24 storehouse pumps, air inlet main valves(30), compressed air main pipe(90), conveying main pipe(51)With discharging main valve(26), every storehouse pump includes body(20), inlet valve(21), level-sensing device(22), air bleeding valve(25), it is characterized in that:Parallel with one another between each storehouse pump of each supply unit, every storehouse pump top sets pressurizing valve(23)Fluidisation valve is set with bottom(24), pressurizing valve and fluidisation valve parallel connection are quoted from compressed air main pipe(90), discharging elbow is also fitted with every storehouse pump(27), discharging elbow(27)Level suitable for reading accesses transfer pipeline.

Description

Fluidization parallel connection storehouse pump induction system and method
Technical field:
The present invention relates to Geldart-D particle field, more particularly to a kind of thermal power plant's flyash positive pneumatic conveying system and side Method.
Background technology:
Geldart-D particle is using the principle of Dual-Phrase Distribution of Gas olid, using compressed air as carrier and power, by powder (grain) shape thing Material is transported to purpose storage container.Pneumatic Conveying Technology is broadly divided into negative-pressure pneumatic conveying, pressure-fired Geldart-D particle, positive-pressure pneumatic Conveying etc., fluidization parallel connection storehouse pump induction system is a kind of form of malleation conveying.Positive pneumatic conveying system is with its air consumption The advantages of low, conveying output capacity is big, fed distance is remote, pipe wear is small, obtains in industries such as thermoelectricity generating, chemical industry, medicine and food To extensive use.
The air-transport system of prior art, by the way of the series connection of pumps of Duo Tai storehouses.With thermal power plant electric cleaner ash As a example by the lower positive pneumatic conveying system of bucket, as shown in figure 1, its operating procedure is:The inlet valve 21 ' of storehouse pump 20 ' is opened, material from Electric duster ash bucket 10 ' loads storehouse pump 20 ' by gravity, and storehouse pump 20 ' is interior to be provided with level-sensing device 22 ', after storehouse pump 20 ' is filled, material position Meter 22 ' is triggered, and inlet valve 21 ' is closed, and delivers air through the distribution of master air suction valve 30 ' to the laggard pump 20 ' that puts in storage of each function tracheae, Material in storehouse pump 20 ' is transported to distant place Hui Ku by conveyance conduit 50 '.The top of conveyance conduit 50 ' is equipped with pressure transmitter, In pipeline after discharge pressure reduction, current conveying circulation is completed.Then storehouse pump 20 ' feeds again, starts next conveying circulation.
Granularity and concentration sensitive of the Geldart-D particle to transported material material.It is existing for the cinder that Boiler Electrostatic Precipitator is produced Technology needs to reduce conveying output capacity, increases gas consumption amount to maintain operation;Fallout and province after being stopped transport for electric cleaner failure The cinder in coal device region, prior art conveying is relatively difficult, poor to various adaptability for working condition.
The content of the invention:
The present invention provides a kind of fluidization parallel connection storehouse pump induction system, system solves the problem the difficult conveying of coarse granule flyash Problem, improves transfer efficiency, and system is reliable and stable.
Another object of the present invention is to provide the carrying method of above-mentioned fluidization parallel connection storehouse pump induction system, and the method is in conveying High-efficiency and economic during conventional granulates.
Concrete technical scheme of the invention is as follows:
Fluidization parallel connection storehouse pump induction system of the invention, the system includes multiple supply units in parallel, each conveying Unit includes 2-4 platforms storehouse pump, air inlet main valve (30), compressed air main pipe (90), conveying main pipe (51) and discharging main valve (26), often Platform storehouse pump includes body (20), inlet valve (21), level-sensing device (22), air bleeding valve (25), between each storehouse pump of each supply unit Parallel with one another, every storehouse pump top sets pressurizing valve (23) and bottom sets fluidisation valve (24), and pressurizing valve and fluidisation valve parallel connection are quoted from pressure Contracting air main pipe (90), is also fitted with discharging elbow (27) in every storehouse pump, discharging elbow (27) level suitable for reading accesses delivery pipe Road.
Further design of the invention is that mouth is located in the pump of storehouse directly over fluidized disk, and two under the discharging elbow Gap (being commonly called as horseshoe highly) is left between person, the clearance height is 0.8~1.2D, and D is the internal diameter of discharging elbow, and control is initial Send concentration;Discharging elbow upper and lower part is bend pipe, and their radius of curvature is 12-18D, and D is interior for discharging elbow Footpath.
Further design of the invention is that the fluidized disk of storehouse pump bottom includes middle fluidisation felt, up-hole plate and lower opening Plate, is formed by stacking by three layers.
Further design of the invention is that air inlet main valve (30) upstream is through gas source and flow amount allocation component (40) in the system Connection source of the gas, downstream connection compressed air main pipe controls the supply to each supply unit;Gas source and flow amount allocation component (40) includes It is successively set on the Self-driven pressure-adjusting valve (41) on pipeline, pressure gauge (43) and porous plate (42).
Further design of the invention is that concentration stabilization valve group (70) is installed at the ash pipeline top of the system, is adjusted defeated Send material bolt in pipeline to optimum length.
Further design of the invention is that the system is additionally provided with blows stifled valve group (60), its upstream connection source of the gas, in conveying When occurring serious material bolt blocking in pipeline, it is passed through compressed air and forces broken block.
The system is additionally provided with back suction valve group (80), its upstream connecting conveying pipe road, downstream through connecting electric duster ash bucket. When blowing stifled valve group (60) and blowing stifled obstructed, back suction valve group (80) will expect that bolt is pumped into dust collector ash hopper, realize forcing broken bolt.
Multiple supply unit a set of induction systems according to setting logic operation of composition parallel with one another.
The carrying method of above-mentioned fluidization parallel connection storehouse pump induction system, the method includes procedure below:
1) charging stage:
The air bleeding valve of each storehouse pump of supply unit is opened simultaneously, and inlet valve (21) is opened after time delay 2-7 seconds in parallel many Charging in the pump of storehouse, treats that the full signal of level-sensing device (22) material issuing or charge time are arrived, and closes inlet valve (21);
2) stage is waited in line:
During multiple supply unit combination transfers, then need to alternately be arranged according to the principle of " transmission exert oneself largest unit priority queue " Team conveys;
3) delivery phase:
Open air inlet main valve (30) and be pressurized to setting value to storehouse pump and subsidiary pipeline 91;
The outlet valve 26 on conveyance conduit is opened, material conveying is carried out;
Air inlet main valve (30) is closed when pipeline pressure at the end of conveying drops to setting value, while open postponing 2-7 seconds Outlet valve (23) is closed afterwards;
4) the unimpeded stage:
System closes all valves of supply unit, opens conveying main pipe (51) back suction valve group (80), back suction and loose stifled The material in pipeline is filled in, stifled valve group (60) pressure purging is blown in unlatching after pipeline pressure drops to null value, if in setting time Conveying main pipe (51) pressure value drops to setting value within (about 30~60 seconds), then closing is blown stifled valve group (60) and exited after postponing 2-7 seconds Unimpeded step;If do not declined in (about 60~90 seconds) conveying main pipe (51) pressure values of setting time, conveying is continued on Main pipe (51) back suction valve group (80) carry out back suction and loose, and repetition is just being blown and back suction step.
Above-mentioned steps 3) in delivery phase, concentration stabilization valve group (70) according to pipeline fluidised form is with intervention and exits, When there is the phenomenon of plugging, system is transferred to above-mentioned steps 4) the unimpeded stage.
In the present invention, the transmission principle brief description of storehouse pump is:Charging aperture (21) is opened, material is because Action of Gravity Field falls into pump In vivo, material pressurization is fluidised to setup pressure value by compressed air after charging aperture closing, and outlet valve (23) triggering is opened, material Realize that material is conveyed in order by the discharge nozzle press-in transporting elbow from fluidized disk, shape is conveyed from conveyance conduit pressure visual supervisory control State., there are two compressed air intervention points of fluidisation and pressurization the characteristics of fluidized pump including (1) storehouse pump, and material can be filled Divide " disturbance ", it is to avoid " dead band " problem that conventional storehouse pump easily occurs;(2) fluosolids of storehouse pump bottom is one layer of porous plate pair Highly-breathable fluidisation felt is pressed from both sides, uniform, suspension loose to powder in the pump of storehouse and fully exposure when compressed air blows over fluosolids from bottom Gas;(3) storehouse pumps out material mouth directly over fluidized disk, and height (being commonly called as horseshoe highly) control between the two initially sends dense Degree;(4) storehouse pump discharging elbow radius of curvature about 12-18D, not only contributes to static pressure lifting material bolt and contributes to material to be transferred to water There is initial velocity during flat pipe, it is to avoid the phenomenon of discharging plugging.
The present invention has the following advantages that compared to existing technology:
1st, the present invention devises gas source and flow amount allocation component, avoids robbing gas and string when many supply units share same source of the gas The interference of gas.By total source of the gas according to each supply unit air consumption requirement carry out it is rationed, will not between each supply unit because Collaborate and cause conveying not smooth and over worn problem;
2nd, the present invention devises the fluid tank pump configuration that can fully fluidize material in bottom, and Duo Tai storehouses pump Discharge nozzle is connected in parallel in a conveying main pipe and sends simultaneously, gives full play to the maximum transmission capacity of pipeline;
3rd, concentration stabilization valve group is devised in system, is carried out according to ash pipe pressure value in the conveying thick material stage automatic appropriate Tonifying Qi, stabilization transportation concentration;
4th, stifled valve group is blown in system, in the unexpected big ups and downs of material characteristic, the interior conveying fluidised form unstability of pipeline plugging occurs and asks During topic, system is automatically switched to blows stifled mould pattern, dredging pipeline the step of blow stifled valve according to " first blow and take out afterwards ", and according to pipeline pressure Power judges whether whether pipeline is unobstructed, and normal delivery mode is transferred to after pipe-dredging.For example conveying electric cleaner fallout and During the coarse granule flying dust in economizer region, induction system is equipped with the valve group can avoid plugging in course of conveying and erosive wear from asking Topic.
5th, in present system, the quantity of storehouse pump in parallel is two to four, by multiple storehouse pump groups into parallel units connect To conveying main pipe, Alternating Transportation in a main pipe can be connected on multiple supply units, give full play to the maximum delivery energy of pipeline Power.
6th, the method for the present invention, will be switched to unimpeded pattern when occurring serious pipeline jam accident in automated system operation, Stifled valve pressure purging is blown in unlatching after system is automatically switched off all valves, if pipeline pressure does not decline after setting purge time, Then close and blow stifled valve, open negative pressure suck-back line clogging material of the back suction valve using ash bucket, one circulates at most two, three at least Circulation can blow logical, and blowing logical rear system in pipeline is transferred to automatic transport pattern, reduces manual operation.
Brief description of the drawings:
Fig. 1 is a kind of structural representation of existing positive pneumatic conveying system.
Fig. 2 is fluidization parallel connection storehouse pump induction system typical structure schematic diagram of the present invention.
Fig. 3 a are fluidization parallel connection storehouse of the present invention pump storehouse pump top views.
Fig. 3 b are that storehouse pumps out material state diagram.
Fig. 3 c are storehouse pump pressurization fluidisation state diagrams.
Fig. 3 d are the partial structural diagrams of Fig. 3 b storehouses pump fluidized disk.
Fig. 3 e are the structural representations of discharging elbow.
Fig. 4 a are gas source and flow amount allocation component structural representations of the present invention.
Fig. 4 b are the structural representations of porous plate in gas source and flow amount allocation component.
Fig. 5 is that two units of of the invention pair of storehouse parallel connection of pumps share a system structure diagram for conveying main pipe conveying;
Fig. 6 is the system structure diagram of four storehouse of the invention parallel connection of pumps conveying;
Fig. 7 is the system structure diagram of the conveying that of the invention pair of storehouse parallel connection of pumps simplifies concentration stabilization valve group;
Charging aperture, pressurization mouth, exhaust outlet, level-sensing device mouthful and discharging opening are arranged at storehouse pump top, and fluidisation interface is arranged at bottom, according to work( Can be docked with relevant device or pipeline.
Each controls flow with one porous plate of gas point, and porous plate suqare is implemented than actual demand about 10% When block aperture microcall gas point flow.
In figure:10- dust collector ash hoppers;11- pressurization interfaces;12- fluidizes interface;13- feeds interface;14- discharging interfaces; 15- material position interfaces;16- exhaust ports;20- bodies;21- inlet valves;22- level-sensing devices;23- pressurizing valves;24- fluidizes valve;25- is arranged Air valve;26- outlet valves;27- discharging elbows;28- fluidized disks;281- up-hole plates;282- fluidizes felt;283- orifice plates;30- air inlets Main valve;40- gas source and flow amount allocation components;41- pressure regulator valves;42- pressure gauges;43- porous plates;50- transfer pipelines;51- conveyings are female Pipe;60- blows stifled valve group;70- concentration stabilization valve group;80- back suction valve groups;90- compressed air main pipes;91- subsidiary pipelines.
Specific embodiment:
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Air-transport system is all very sensitive to the granularity of transported material material, concentration and proportion, particularly with remote and thick For the material of granularity, the stability requirement to induction system is very high.For example it is dynamic using ash high in Southwestern China and the Northeast Power coal power generation, flying dust granularity after this kind of coal combustion is compared with thick and granularity is unstable so that induction system is easy to be occurred to block thing Therefore, a large amount of dust stratifications of ash bucket or even the severe accident for collapsing are caused, therefore requirement of this kind of engineering to the stability of induction system is more It is high.
Embodiment one:
As shown in Fig. 2 the invention provides a kind of fluidization parallel connection storehouse pump induction system, the system includes the multigroup of parallel connection Supply unit, each supply unit includes two storehouse pumps, air inlet main valve 30, compressed air main pipe 90, conveying main pipe 51 and discharging Main valve 26, (a supply unit structure is given in figure) parallel with one another between two storehouse pumps of each supply unit.
Every storehouse pump includes body 20, inlet valve 21, level-sensing device 22, air bleeding valve 25, and every storehouse pump top sets pressurizing valve 23 Fluidisation valve 24 is set with bottom, pressurizing valve and the fluidisation parallel connection of valve 24 are also fitted with out quoted from compressed air main pipe 90 in every storehouse pump Material bend pipe 27, the level suitable for reading of discharging elbow 27 accesses transfer pipeline.
Such as Fig. 3 a, storehouse pump is provided with pressurization interface 11, fluidisation interface 12, charging interface 13, discharging interface 14, material position interface 15th, exhaust port 16.Such as Fig. 3 d, the fluidized disk of storehouse pump bottom includes middle fluidisation felt 282, up-hole plate 281 and orifice plate 283, it is formed by stacking by three layers.The needling structure for fluidizing felt has preferable permeability, compressed air can be uniformly passed through into the bed of material Bottom, is allowed to fully fluidisation, but the compactness of fluidisation felt can also prevent trickle material from entering the air-purifying chamber of pump that puts in storage simultaneously.Upper lower opening The uniform air-vent of plate has good gas permeability, while the rigid structure of upper orifice plate is sustainable and protection fluidizes felt.Fluidized disk It is " labyrinth " sealing structure between the pump interface flange of storehouse, also effectively prevents material from entering the possibility of air-purifying chamber from periphery " string ".
As shown in Fig. 3 b, 3c, 3e, mouth is located in the pump of storehouse directly over fluidized disk, and at both under discharging elbow in the present invention Between leave gap (being commonly called as horseshoe highly), clearance height is 0.8~1.2D, and to control initially to send concentration, D is discharging elbow Internal diameter;Discharging elbow upper and lower part is bend pipe, and their radius of curvature is 12-18D, and D is the internal diameter of discharging elbow. Discharging elbow total height is generally 3.5-5 meters, wherein epimere a arc length more than storehouse pump body height:Stage casing (straightway) b length: The proportionate relationship of hypomere c arc length is:4~5:4:1, discharging elbow can be assembled using two-part.
The system also includes gas source and flow amount allocation component 40, and as shown in Fig. 4 a, 4b, air inlet main valve (30) is by source of the gas for its structure Distribute to the air inlet of each storehouse pump;Conveyance conduit 50 and storehouse pump, gas source pipe, blow blocked pipeline and be connected;Many storehouse pumps in parallel Upper end interface is connected with conveyance conduit 50;Block apparatus 60 are blown to be arranged on the conveyance conduit 50 in all storehouse pump downstreams.
Often set air-transport system can set a gas source and flow amount allocation component 40, and the component is by pressure regulator valve 41, pressure Table 42 and current plate 43 are constituted.Pressure regulator valve 41 is Self-driven pressure-adjusting valve, and it needs measure pipeline pressure to feed back to the execution of itself Mechanism by contrast after can just adjust valve opening, to ensure the pressure stability of the upstream of porous plate 42.Managed according to compressible fluid By, porous plate upstream and downstream pressure ratio be more than 1.83 when, be directly proportional to area by the flow of orifice plate.Therefore can basis The pressure of orifice plate upstream is set and using after regulating valve lock pressure, the supply unit for different requirements is set not needed for system Corresponding air mass flow can be just distributed with the porous plate of area.The component is adjusted for positive feedback, the pipe that pressure regulator valve contrast is measured Road pressure value and setting value adjustment aperture, to lock the pressure value of the source of the gas of orifice plate upstream, the pressure ratio of porous plate upstream and downstream During more than theoretical value, tolerance is directly proportional to circulation area, and this regulative mode is shared when a set of source of the gas is conveyed in multiple-unit and avoided Mutual collaborate.
The special fluidisation felt material in storehouse pump bottom and structure ensure compressed air uniformly through and without flyash leakage, bottom Portion's fluidization air and top compression air are disturbed and suspended to flyash jointly, realize that low flow velocity static pressure bolt shape mode sends, interior The transmission concentration of the head room control material of portion's discharge nozzle and fluidisation felt.
Concentration stabilization valve group is two groups of regulation valve groups in parallel, and the valve group one end connects with compressed air gas source, one end with it is defeated Send main pipe top to connect, one group is manually-operated gate, kept after adjusting aperture, another road is automatic valve, is become in material particular diameter When occurring plugging trend after difference, tonifying Qi, the pipeline jam accident that dilution tunnel concentration is avoided the occurrence of are automatically opened up.The stabilizer is adapted to Use the coarse granule that is produced during ash-rich coal, high specific gravity fly ash carry needs, adapted to and self-regulation ability with very strong.
In the charging stage, storehouse pump is fed first.Storehouse pump inlet valve 21 is opened, material is from dust collector ash hopper 10 Storehouse pump is loaded by gravity, level-sensing device is provided with the pump of storehouse, when material is full or feed time is closed to inlet valve.Terminate in charging Afterwards, air inlet main valve (30) is opened compressed air and is entered in the pump housing through the fluidisation valve 24 of the pressurizing valve 23 at the top of the pump of storehouse and bottom simultaneously Material in many storehouse pumps is fully fluidized and suspended, defeated grey main pipe top discharge valve 26 is opened when pump pressure rises to setting value in storehouse defeated Send material.Load in the pump of storehouse is matched by the aperture of pressurizing valve 23 and fluidisation valve 24 and carries out accurate adjustment, special for conveying Property the less material of fluctuation load is increased under conditions of conveyance conduit pressure is stablized, as far as possible, raising system is exerted oneself.
In the conveying starting stage, fluidized pump acts on coarse granule flyash, makes simultaneously using fluidized gas and pressurization gas Fully " stirring ", the bubble of flyash surface adhesion reduces floating velocity to sum conveying gas.In discharging, flyash and compression are empty Gas suspension thing lifts 4~5m to the main pipe that discharges under a static pressure, and ash/gas two-phase is once sufficiently stirred for and powder in this process Coal ash has certain initial velocity, is conducive to the long distance delivery in horizontal pipe.
Pneumatic conveying method of the invention, comprises the following steps:To loading flyash in many storehouse pumps in parallel;To in the pump of storehouse Compressed air is poured, is conveyed when setting pressure is reached, the fine coal ash concentration in the concentration stabilization stabilization ash pipeline of valve group 70 Until conveying terminates.
The induction system can include 2-4 supply units, be mutually in parallel between each supply unit, can be total between each unit With an air inlet main valve and gas source and flow amount allocation component.
Embodiment two:
According to one embodiment of present invention (Fig. 5), there are 2 supply units under the deduster of Generator Set, often It is parallel with one another between two storehouse pumps of individual supply unit, two public conveying main pipes of supply unit can be realized replacing Conveying.When a unit terminates conveying, another unit starts conveying, has played the maximum transmission capacity of pipeline.Can also root Increase supply unit according to concrete condition.
According to one embodiment of present invention (Fig. 5), an electric field conveys cinder and ash quantity is larger, and the ash of subsequent electric field is thin And ash quantity is less, corresponding electric field supply unit air demand is larger, and remaining is then less.Source of the gas allocation component and different area Porous plate can automatically distribute tolerance to each supply unit according to the air consumption of theoretical calculation, both met the need of supply unit Tolerance is required and not interfere with each other.
Embodiment three:
According to one embodiment of present invention, larger for the demand of exerting oneself but conveying moderate distance induction system, each The pump single group in storehouse in parallel of supply unit can reach four (Fig. 6), can be combined with multiple supply units and used, and open out The flyash in four storehouse pumps is conveyed during material valve simultaneously, conveying switching time is reduced, the maximum defeated of storehouse pump and pipeline has been played Send ability.
Example IV:
According to one embodiment of present invention, material ingredient stability and when being readily delivered, concentration stabilizer can be with A manual modulation valve (Fig. 7) is optimized for, the feature according to material locks the aperture of valve in delivery phase, supplemented appropriate Tolerance can just maintain the maximum concentration of pipeline, the optimization reduced when reliability is ensured system complexity and and into This.
Embodiment five:
By taking the pump induction system in storehouse in parallel of Fig. 2 as an example, the conveying side of fluidization parallel connection storehouse pump induction system of the present invention is illustrated Method process is as follows:The induction system also includes PLC or DCS controllers, and each valve is connected with PLC or DCS controllers, realizes automatic control System.
1) charging stage:
The air bleeding valve of each storehouse pump of supply unit is opened simultaneously, and the time delay several seconds (2-7 seconds) opens inlet valve (21) to parallel connection afterwards Duo Tai storehouses pump in charging, treat that the full signal of level-sensing device (22) material issuing or charge time are arrived, close inlet valve (21);
2) stage is waited in line:
Multiple supply units need to be according to the principle Alternating Transportation of " transmission exert oneself largest unit priority queue ";
3) delivery phase:
Open air inlet main valve (30) and be pressurized to setting value to storehouse pump and subsidiary pipeline;
The outlet valve 26 on conveyance conduit is opened, material conveying is carried out;
Air inlet main valve (30) is closed when pipeline pressure at the end of conveying drops to setting value, while unlatching is delayed by several seconds (2-7 seconds) closes outlet valve (23) afterwards;
4) the unimpeded stage:
System closes all valves of supply unit, opens conveying main pipe (51) back suction valve group (80), back suction and loose stifled The material in pipeline is filled in, stifled valve group (60) pressure purging is blown in unlatching after pipeline pressure drops to null value, if in setting time Conveying main pipe (51) pressure value drops to setting value within (about 30~60 seconds), then be delayed by several seconds (2-7 seconds) and close afterwards and blow stifled valve group (60) unimpeded step is exited;If do not declined in (about 60~90 seconds) conveying main pipe (51) pressure values of setting time, continue Opening conveying main pipe (51) back suction valve group (80) carries out back suction and loose, and repetition is just being blown and back suction step.
Carrying method of the present invention, wherein, in above-mentioned 3) delivery phase, concentration stabilization valve group 70 is according to pipeline fluidised form companion With intervening and exiting, when there is the phenomenon of plugging, system is transferred to the unimpeded stage.
Application example:
Coal source feature in Yunnan Province of China high altitude localities is that ash high is low in calories, the flyash of these coals burning generation Grain is thick, than great.In the fed distance of 600MW units equivalent distance more than 800, the storehouse pump in parallel using Fig. 2 of the present invention is defeated System is sent, flyash strengthens by mobility after the fluidization period of fluidized pump, the starting velocity reduction of conveying is a lot, reduces Long distance delivery difficulty;Pressure change dynamic tonifying Qi of the concentration stabilizer in course of conveying all the time according to conveyance conduit, keeps The most economical reliable transportation concentration that pipeline begins, realizes and is difficult the cinder of Geldart-D particle and realizes the continuous conveying of exerting oneself greatly.

Claims (7)

1. a kind of fluidization parallel connection storehouse pump induction system, the system includes multiple supply units in parallel, each supply unit bag Include 2-4 platforms storehouse pump, air inlet main valve(30), compressed air main pipe(90), conveying main pipe(51)With discharging main valve(26), every storehouse pump Including body(20), inlet valve(21), level-sensing device(22), air bleeding valve(25), it is characterized in that:Each storehouse pump of each supply unit it Between it is parallel with one another, every storehouse pump top sets pressurizing valve(23)Fluidisation valve is set with bottom(24), pressurizing valve and fluidisation valve it is in parallel quoted from Compressed air main pipe(90), discharging elbow is also fitted with every storehouse pump(27), discharging elbow(27)Level suitable for reading accesses conveying Pipeline;Mouth is located in the pump of storehouse directly over fluidized disk under the discharging elbow, and leaves gap therebetween, and the clearance height is 0.8 ~ 1.2D, D are the internal diameter of discharging elbow, and control is initial to send concentration;Discharging elbow upper and lower part is bend pipe, they Radius of curvature be 12-18D, D is the internal diameter of discharging elbow;Air inlet main valve in the system(30)Upstream is distributed through gas source and flow amount Component(40)Connection source of the gas, downstream connection compressed air main pipe controls the supply to each supply unit;Gas source and flow amount allocation component (40)Including the Self-driven pressure-adjusting valve being successively set on pipeline(41), pressure gauge(43)And porous plate(42);The system it is defeated Ash pipe top is installed by concentration stabilization valve group(70), the material bolt in adjustment conveyance conduit is to optimum length.
2. fluidization parallel connection storehouse pump induction system according to claim 1, it is characterized in that:During the fluidized disk of storehouse pump bottom includes Between fluidisation felt, up-hole plate and orifice plate, be formed by stacking by three layers.
3. fluidization parallel connection storehouse pump induction system according to claim 1, it is characterized in that:The system is additionally provided with blows stifled valve group (60), its upstream connects source of the gas, when occurring serious material bolt blocking in conveyance conduit, is passed through compressed air pressure broken block.
4. fluidization parallel connection storehouse pump induction system according to claim 1, it is characterized in that:The system is additionally provided with back suction valve group (80), its upstream connecting conveying pipe road, downstream through connecting electric duster ash bucket;Blowing stifled valve group(60)When blowing stifled obstructed, instead Take out valve group(80)Material bolt is pumped into dust collector ash hopper, realizes forcing broken bolt.
5. the fluidization parallel connection storehouse pump induction system according to claim 1,2,3 or 4, it is characterized in that:Multiple supply unit phases Mutually compose in parallel a set of induction system according to setting logic operation.
6. the carrying method of fluidization parallel connection storehouse pump induction system described in claim 1, the method includes procedure below:
1)Charging stage:
The air bleeding valve of each storehouse pump of supply unit is opened simultaneously, and inlet valve is opened after time delay 2-7 seconds(21)To Duo Tai storehouses pump in parallel Interior charging, treats level-sensing device(22)The full signal of material issuing or charge time are arrived, and close inlet valve(21);
2)Wait in line the stage:
During multiple supply unit combination transfers, then need to alternately be queued up according to the principle of " transmission exert oneself largest unit priority queue " defeated Send;
3)Delivery phase:
Open air inlet main valve(30)Setting value is pressurized to storehouse pump and subsidiary pipeline 91;
The outlet valve 26 on conveyance conduit is opened, material conveying is carried out;
Air inlet main valve is closed when pipeline pressure at the end of conveying drops to setting value(30), while unlatching is delayed by several seconds 2-7 seconds After close outlet valve(23);
4)The unimpeded stage:
System closes all valves of supply unit, opens conveying main pipe(51)Back suction valve group(80), back suction and loose it is blocked in Material in pipeline, stifled valve group is blown in unlatching after pipeline pressure drops to null value(60)Purging is forced, if in setting time conveying Main pipe(51)Pressure value drops to setting value, then closed after postponing 2-7 seconds and blow stifled valve group(60)Exit unimpeded step;If set Fix time conveying main pipe(51)Pressure value does not decline, then continue on conveying main pipe(51)Back suction valve group(80)Carry out back suction and Loose, repetition is just being blown and back suction step.
7. carrying method according to claim 6, wherein, above-mentioned steps 3)In delivery phase, concentration stabilization valve group(70) According to pipeline fluidised form is with intervention and exits, when there is the phenomenon of plugging, system is transferred to above-mentioned steps 4)The unimpeded stage.
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CN105173742A (en) * 2015-09-09 2015-12-23 上海隆麦机械设备工程有限公司 Novel large bin pump for pneumatic material conveying system
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