CN105775748A - Rotary feeding pulverized coal quantitative feeding and conveying device and method - Google Patents
Rotary feeding pulverized coal quantitative feeding and conveying device and method Download PDFInfo
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- CN105775748A CN105775748A CN201610250047.2A CN201610250047A CN105775748A CN 105775748 A CN105775748 A CN 105775748A CN 201610250047 A CN201610250047 A CN 201610250047A CN 105775748 A CN105775748 A CN 105775748A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
- B65G53/06—Gas pressure systems operating without fluidisation of the materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
- B65G53/4608—Turnable elements, e.g. rotary wheels with pockets or passages for material
- B65G53/4625—Turnable elements, e.g. rotary wheels with pockets or passages for material with axis of turning perpendicular to flow
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- Mechanical Engineering (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The invention discloses a rotary feeding pulverized coal quantitative feeding and conveying device and a method. The feeding device consists of a locking hopper system, a pulverized coal looser, a pressing feeder, a pulverized coal flow meter and related control valves; the locking hopper system realizes feeding of pulverized coals from normal pressure to increased pressure; the lower part of a feeding hopper is connected with the pulverized coal looser for preventing bridge blockage of the pulverized coals; the lower part of the pulverized coal looser is connected with the pressing feeder; the continuous and stable feeding of the pulverized coals is realized through a mechanical rotary feeding mode; the lower part of the pressing feeder is connected with a pneumatic conveying device; and materials are continuously fed into reaction equipment through a pneumatic conveying mode. The feeding device realizes pressed, continuous and quantitative feeding of the pulverized coals through matching the locking hopper feeding system with the pressing feeding system and the pneumatic conveying system, guarantees the stability of the feeding system, and is convenient for operation, simple in control, accurate in metering and capable of being widely applied to feeding of the pulverized coals with different particle sizes and other solid materials.
Description
Technical field
The present invention relates to the reinforced of derived energy chemical field solid powder and conveying, be specifically related to a kind of rotation feed formula fine coal quantitative feeding conveyer device and method.
Background technology
Coal dust forced feed and conveying are the raw material supply sources of dry powder coal gasification and pulverized coal pyrolysis, are one of key technologies affecting subsequent reactions technique whether continuous and steady operation.At present, coal dust forced feed and conveying mainly have two kinds of technical schemes: a kind of is use gas as the pressurization dense phase gases conveying technology of carrier gas, and this technology mainly includes bottom discharging dense-phase transporting system, such as Shell and Prenflo mode, and upper outlet dense-phase transporting system, such as GSP mode.The second is solid pump conveying technology at the early-stage.
The difference of two kinds of charging technologies of Shell and GSP is that Shell gasification furnace adopts bottom discharge sending cans loader plus pipeline two-phase transportation coal-supply system；And GSP adopts top discharge sending cans feed and pipeline dense-phase transporting system coal supply, having fluidized plate and agitator in the bottom of sending cans, coal chute is drawn from tank top and passes to the nozzle of top of gasification furnace.In top discharge issuance of materials tank, bottom of device is provided with air chamber and fluidized plate, conveyance conduit enters issuance of materials tank from issuance of materials tank top or sidepiece, extends to distance fluidized plate is a certain and determine height and position, and gas mode of entrance has following several: enter from issuance of materials tank top adding form of calming the anger；Enter from tapering with fluidized gas form；Entered from bottom air plenum by fluidized plate.The discharge of material relies primarily on the effectively fluidisation of material and feeds conveying pipe, be therefore only applicable to conveying can fluidised powder, in tank, material can not be emptied completely, and crushing own is relatively large.Top discharge issuance of materials tank is in the past once commonly used, now only restricted at installing space or require just employing top discharge is arranged, and traditional Fluxo storehouse pump is its representative.
Solid pump conveying technology is the development trend of following powder coal charge conveying.At present, not yet ripe about the research of this respect abroad, the maximum output pressure such as the StametPump of GE company of U.S. exploitation can reach 6.9MPa, but this technology is in the laboratory research stage, does not also obtain industrial applications.The research of domestic solid pump technology is also at the starting stage, in addition it is also necessary to carry out substantial amounts of research work.
Summary of the invention
It is an object of the invention to solve prior art, that the conveying of the solid material such as coal dust is existed precision is low, the defects such as conveying is unstable, one is provided can better to control feed rate, accurate measurement, control simple, it is possible to the rotation feed formula fine coal quantitative feeding conveyer device of pressurization continuous-stable charging and method.
For achieving the above object, the feed arrangement of the present invention includes the coal bunker, lock hopper, feed hopper, coal dust loosening device and the pressurization dispenser that are sequentially connected, the outlet of pressurization dispenser is connected with conveyance conduit, one end of conveyance conduit connects air supply system, other end coupled reaction equipment, and the outlet rear end being positioned at pressurization dispenser on conveyance conduit is provided with fine coal effusion meter, coal dust loosening device is connected with air supply system also by scavenging pipeline and the purging air valve that is arranged on this pipeline.
Described pressurization dispenser is mechanical quantitative charging gear, including annular space inwall and central shaft and install gear on center shaft, and the blanking lattice formed between gear and annular space inwall.
The gas source pipe of described fine coal effusion meter both sides is separately installed with first and second coal dust stop valve.
Described coal bunker export pipeline is disposed with push-pull valve and the wear-resisting moushroom valve of charging；Lock hopper export pipeline is provided with the wear-resisting moushroom valve of discharging.
Described lock hopper is connected with air supply system also by pressurising pipeline and the equalizer valve that is arranged on pressurising pipeline, also includes the pressure relief pipe being provided with relief valve being connected with coal bunker and lock hopper.
Described feed hopper upper end is connected with air supply system by voltage stabilizing pipeline and the pressure maintaining valve that is arranged on voltage stabilizing pipeline, feed hopper lower end is connected with air supply system by loosening pipeline and the loosening valve that is arranged on loosening pipeline, and is additionally provided with the lock hopper equalizing line with lock hopper balanced valve between pressurising pipeline and voltage stabilizing pipeline.
Described feed hopper is connected also by with the conveyance conduit after the feed equalizing line of feed balanced valve and the first coal dust stop valve valve.
The feed process of the present invention, comprises the following steps:
1) system pressurising: all valve original states are closedown, open loosening air valve, and feed hopper is pressurized to operation pressure, is then shut off loosening air valve；Open pressure maintaining valve, feed hopper pressure stability is regulated at operation pressure；
2) material level is set up: coal bunker is atmospheric pressure device, wherein stores qualified coal dust, when setting up feed hopper material level, starts lock hopper feed system, is added in feed hopper with pressure by normal pressure pulverized coal by sequence logic；
3) fine coal charging: when feed hopper material level set up qualified after, open air supply system, open the first coal dust stop valve and the second coal dust stop valve, tolerance and the flow velocity of feed-line is set by air supply system, open feed hopper balanced valve, after opening air-transport system, open purging air valve, enable coal dust loosening device, set and purge throughput, after enabling coal dust loosening device, starting pressurization dispenser, coal dust enters pressurization dispenser blanking lattice, by the rotation of central shaft, fall into conveyance conduit, under air conveying effect, enter consersion unit.
The gas that purges of described scavenging pipeline is 0.004～0.01m/s in the gas speed of coal dust loosening device internal face.
The operating gas velocity of described conveyance conduit is 9～15m/s.
The particle size range of the raw material coal dust of the present invention is 0.045～1mm, moisture < 4 (ad, %).Additionally, this device is also applied for continuous, the quantitative feeding of the solid material such as flyash, sand.Described rotation feed formula fine coal quantitative feeding conveyer device operation pressure is normal pressure～3.0MPa.
The beneficial effects of the present invention is:
1) device controls feed rate by the dispenser that pressurizes, and pressurization dispenser is mechanical type rotating feed, by the rotating speed that different frequency is corresponding different, reaches to regulate the purpose of feed loading；Fine coal flow is calculated as speed and density measure element, and certainty of measurement is high, by pressurize dispenser and fine coal effusion meter with the use of, form the solid powder feed process of a kind of stability contorting feed rate and accurate measurement.
2) coal dust loosening device is by purging the effect of gas, forms air film at internal face, effectively prevents bridge formation and the blocking of coal dust, reach the purpose of continuous-stable charging.
3) device is easy to operate, controls simple, can be widely applied to the charging of different-grain diameter fine coal and other solid materials.
Accompanying drawing explanation
Fig. 1 is assembly of the invention overall structure schematic diagram.
In figure: 1, coal bunker；2, push-pull valve；3, the wear-resisting moushroom valve of charging；4, lock hopper；5, the wear-resisting moushroom valve of discharging；6, equalizer valve；7, relief valve；8, lock hopper balanced valve；9, feed hopper；10, pressure maintaining valve；11, air valve is loosened；12, feed hopper balanced valve；13, coal dust loosening device；14, air valve is purged；15, pressurization dispenser；16, the first coal dust stop valve；17, fine coal effusion meter；18, the second coal dust stop valve；19, air supply system；20, consersion unit, 25, conveyance conduit.
Fig. 2 be the present invention pressurizes dispenser part control element schematic.
In figure: 21, gear；22, blanking lattice；23, annular space inwall；24, central shaft；
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to Fig. 1, device of the present invention mainly includes lock hopper feed system, pressurization feeding system and air-transport system three part, is made up of coal bunker 1, lock hopper 4, feed hopper 9, coal dust loosening device 13, pressurization dispenser 15, fine coal effusion meter 17, air supply system 19 and relevant control valve respectively.
Coal bunker 1 is atmospheric pressure device, coal bunker 1 bottom is connected with lock hopper 4 by push-pull valve 2, the wear-resisting moushroom valve 3 of charging, lock hopper 4 bottom is connected with feed hopper 9 by the wear-resisting moushroom valve 5 of discharging, feed hopper 9 bottom is directly connected with coal dust loosening device 13, fine coal loosening device 13 bottom is connected with pressurization dispenser 15, pressurization dispenser 15 is connected with conveyance conduit 25, one end of conveyance conduit connects air supply system 19, other end coupled reaction equipment 20, conveyance conduit 25 is disposed with the first coal dust stop valve 16, fine coal effusion meter the 17, second coal dust stop valve 18.
Lock hopper 4 is connected with air supply system 19 also by pressurising pipeline and the equalizer valve 6 that is arranged on pressurising pipeline, also include the pressure relief pipe being provided with relief valve 7 being connected with coal bunker 1 and lock hopper 4, feed hopper 9 upper end is connected with air supply system 19 by voltage stabilizing pipeline and the pressure maintaining valve 10 that is arranged on voltage stabilizing pipeline, feed hopper 9 lower end is connected with air supply system by loosening pipeline and the loosening valve 11 that is arranged on loosening pipeline, and between pressurising pipeline and voltage stabilizing pipeline, it is additionally provided with the lock hopper equalizing line with lock hopper balanced valve 8, feed hopper 9 is connected also by with the conveyance conduit 25 after the feed equalizing line of feed balanced valve 12 and the first coal dust stop valve 16 valve.
Referring to Fig. 2, pressurization dispenser 15 be mechanical quantitative charging gear, including annular space inwall 23 and central shaft 24 and be arranged on the gear 21 on central shaft 24, and the blanking lattice 22 of formation between gear 21 and annular space inwall 23.
The method of the present invention is as follows:
Fine coal continuous and quantitative feed arrangement of the present invention, raw material coal dust is the qualified fine coal prepared through coal mill system, drying system, sent to coal bunker by air-transport system, coal bunker stores the raw material coal dust of q.s, by the pressurization of this device, continuous, stable joining in consersion unit.When coal bunker Raw coal dust is inadequate, it is possible to supplemented in time by coal dust preparation system and air-transport system.
The feed process of the present invention comprises the following steps:
1) system pressurising: all valve original states are closedown, opens loosening air valve 11, feed hopper 9 is pressurized to operation pressure, is then shut off loosening air valve 11；Open pressure maintaining valve 10, feed hopper 9 pressure stability is regulated at operation pressure.
2) material level is set up: coal bunker 1 is atmospheric pressure device, wherein stores qualified coal dust.When lock hopper 4 material level is set up, open the push-pull valve 2 of coal bunker 1 bottom, open relief valve 7, for lock hopper 4 pressure release, when lock hopper 4 pressure is let out to normal pressure, open the wear-resisting moushroom valve 3 of charging, coal dust enters lock hopper 4 from coal bunker 1, when lock hopper 4 material-level measure height gives the correct time, close the wear-resisting moushroom valve 3 of charging, close relief valve 7, open equalizer valve 6, for lock hopper 4 pressurising, when lock hopper 4 pressure detecting is than feed hopper 9 low 10KPa, close equalizer valve 6, open the wear-resisting moushroom valve 5 of discharging, open lock hopper balanced valve 8, the powder in lock hopper 4 is all added in feed hopper 9, set up the material level of feed hopper 9.
3) fine coal charging: when feed hopper 9 material level set up qualified after, open air-transport system, open the first coal dust stop valve 16 and the second coal dust stop valve 18, set tolerance and the flow velocity of feed-line by air supply system 19, open feed hopper balanced valve 12.After opening air-transport system, open purging air valve 14, enable coal dust loosening device 13, set suitable purging throughput.After enabling coal dust loosening device 13, connect pressurization dispenser 15 power supply, set suitable electric machine frequency, starting pressurization dispenser 15, coal dust enters pressurization dispenser 15 blanking lattice 22, by the rotation of central shaft 24, fall into air conveying pipeline, under air conveying effect, enter consersion unit 20.
Difference according to pressurization dispenser 15 central shaft 24 rotating speed, feed rate is then different, therefore, it can regulate the feed loading entering consersion unit 20 easily.
Pressurization dispenser 15 is coordinated to use by fine coal effusion meter 17, it is possible to coal input quantity is carried out accurate quantification.
Coal dust loosening device 13 is by purging the effect of gas, it is possible to be effectively formed air film, it is prevented that coal dust is built bridge herein, causes blanking unstable, and purging gas is 0.004～0.01m/s in the gas speed of coal dust loosening device 13 internal face.
The particle size range of raw material coal dust is 0.045～1mm, moisture < 4 (ad, %).Additionally, this device is also applied for continuous, the quantitative feeding of the solid material such as flyash, sand.
This device operation pressure is normal pressure～3.0MPa.
In order to ensure the smooth delivery of power of coal dust, the operating gas velocity of air conveying pipeline is 10～15m/s, and operation tolerance adjusts according to the change of operation pressure.
The present invention is used for processing the reinforced of chemical industry solid, powdery material and conveying, the especially conveying of 0.045～1mm fine coal.Easily build bridge for fine coal, easily block, the characteristics such as blanking is uneven, the present invention proposes coal dust loosening device and pressurization dispenser, by lock hopper feed system, pressurization feeding system and air-transport system with the use of, reach purpose continuous, stable, quantitative feeding.First, through qualified coal dust prepared by coal mill system, drying system, sent to coal bunker 1 by Pneumatic conveyer, coal bunker 1 stores the coal dust of 36～48h device consumption.During lock hopper 4 charging, first opening relief valve 7, after lock hopper 4 pressure releasing to normal pressure, open the wear-resisting moushroom valve 3 of charging, the coal dust in coal bunker 1 enters lock hopper 4 by gravity.When lock hopper 4 material level height gives the correct time (70～80%), close the wear-resisting moushroom valve 3 of charging, close relief valve 7, open equalizer valve 6, when being depressed into lock hopper 4 pressure filling lower than feed hopper 9 pressure 10KPa, close equalizer valve 6.After lock hopper 4 pressurising terminates, opening the wear-resisting moushroom valve 5 of discharging and lock hopper balanced valve 8, the coal dust in lock hopper 4 enters feed hopper 9 by gravity, sets up the material level of feed hopper 9.Feed hopper 9 material level set up qualified after, close the wear-resisting moushroom valve 5 of discharging and lock hopper balanced valve 8, open air-transport system, open the first coal dust stop valve 16 and the second coal dust stop valve 18, tolerance and the flow velocity of feed-line is set by air supply system 19, in order to not cause coal dust to deposit, the gas speed of feed-line is generally 10～15m/s.After opening air-transport system, opening purging air valve 14, enable coal dust loosening device 13, set suitable purging throughput, this flow is different according to the difference of operating pressure, and the speed of general warranty internal face is between 0.004～0.01m/s.After enabling coal dust loosening device 13, connect pressurization dispenser 15 power supply, set suitable electric machine frequency, starting pressurization dispenser 15, coal dust enters pressurization dispenser 15 blanking lattice 22, by the rotation of central shaft 24, fall into air conveying pipeline, under air conveying effect, enter consersion unit 20.
Claims (10)
1. a rotation feed formula fine coal quantitative feeding conveyer device, it is characterized in that: include the coal bunker (1) being sequentially connected, lock hopper (4), feed hopper (9), coal dust loosening device (13) and pressurization dispenser (15), the outlet of pressurization dispenser (15) is connected with conveyance conduit (25), one end of conveyance conduit connects air supply system (19), other end coupled reaction equipment (20), and the outlet rear end being positioned at pressurization dispenser (15) on conveyance conduit (25) is provided with fine coal effusion meter (17), coal dust loosening device (13) is connected with air supply system (19) also by scavenging pipeline and the purging air valve (14) that is arranged on this pipeline.
2. rotation feed formula fine coal quantitative feeding conveyer device according to claim 1, it is characterized in that: described pressurization dispenser (15) is mechanical quantitative charging gear, including annular space inwall (23) and central shaft (24) and be arranged on the gear (21) on central shaft (24), the blanking lattice (22) formed between gear (21) and annular space inwall (23).
3. rotation feed formula fine coal quantitative feeding conveyer device according to claim 1, it is characterised in that: the gas source pipe (25) of described fine coal effusion meter (17) both sides is separately installed with first and second coal dust stop valve (16,18).
4. rotation feed formula fine coal quantitative feeding conveyer device according to claim 1, it is characterised in that: described coal bunker (1) export pipeline is disposed with push-pull valve (2) and the wear-resisting moushroom valve of charging (3)；Lock hopper (4) export pipeline is provided with the wear-resisting moushroom valve of discharging (5).
5. rotation feed formula fine coal quantitative feeding conveyer device according to claim 1, it is characterized in that: described lock hopper (4) is connected with air supply system (19) also by pressurising pipeline and the equalizer valve (6) that is arranged on pressurising pipeline, also includes the pressure relief pipe being provided with relief valve (7) being connected with coal bunker (1) and lock hopper (4).
6. rotation feed formula fine coal quantitative feeding conveyer device according to claim 5, it is characterized in that: described feed hopper (9) upper end is connected with air supply system (19) by voltage stabilizing pipeline and the pressure maintaining valve (10) that is arranged on voltage stabilizing pipeline, feed hopper (9) lower end is connected with air supply system (19) by loosening pipeline and the loosening valve (11) that is arranged on loosening pipeline, and is additionally provided with the lock hopper equalizing line with lock hopper balanced valve (8) between pressurising pipeline and voltage stabilizing pipeline.
7. rotation feed formula fine coal quantitative feeding conveyer device according to claim 1, it is characterised in that: described feed hopper (9) is connected also by with the conveyance conduit (25) after the feed equalizing line of feed balanced valve (12) and the first coal dust stop valve (16) valve.
8. the feed process rotating feed formula fine coal quantitative feeding conveyer device, it is characterised in that comprise the following steps:
1) system pressurising: all valve original states are closedown, opens loosening air valve (11), and feed hopper (9) is pressurized to operation pressure, is then shut off loosening air valve (11)；Open pressure maintaining valve (10), feed hopper (9) pressure stability is regulated at operation pressure；
2) material level is set up: coal bunker (1) is atmospheric pressure device, wherein stores qualified coal dust, when setting up feed hopper (9) material level, starts lock hopper feed system, is added in feed hopper with pressure (9) by normal pressure pulverized coal by sequence logic；
3) fine coal charging: when feed hopper (9) material level set up qualified after, open air supply system (19), open the first coal dust stop valve (16) and the second coal dust stop valve (18), tolerance and the flow velocity of feed-line is set by air supply system (19), open feed hopper balanced valve (12), after opening air-transport system, open purging air valve (14), enable coal dust loosening device (13), set and purge throughput, after enabling coal dust loosening device (13), start pressurization dispenser (15), coal dust enters pressurization dispenser (15) blanking lattice (22), rotation by central shaft (24), fall into conveyance conduit 25, under air conveying effect, enter consersion unit (20).
9. the feed process of rotation feed formula fine coal quantitative feeding conveyer device according to claim 8, it is characterised in that: the purging gas of described scavenging pipeline is 0.004～0.01m/s in the gas speed of coal dust loosening device (13) internal face.
10. the feed process of rotation feed formula fine coal quantitative feeding conveyer device according to claim 8, it is characterised in that: the operating gas velocity of described conveyance conduit (25) is 9～15m/s.
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| CN107140427A (en) * | 2017-06-21 | 2017-09-08 | 南通金源催化剂有限公司 | Anhydrous Aluminum chloride dosing vaporising device |
| CN107284883A (en) * | 2017-07-19 | 2017-10-24 | 陕西延长石油（集团）有限责任公司 | A kind of batch (-type) lock hopper pressurization pulverized coal conveying device and carrying method |
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