CN104444374A - Low-energy-consumption high-pressure powder conveying device - Google Patents
Low-energy-consumption high-pressure powder conveying device Download PDFInfo
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- CN104444374A CN104444374A CN201310451620.2A CN201310451620A CN104444374A CN 104444374 A CN104444374 A CN 104444374A CN 201310451620 A CN201310451620 A CN 201310451620A CN 104444374 A CN104444374 A CN 104444374A
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Abstract
The invention provides a low-energy-consumption high-pressure powder conveying device. A low-pressure conveying air inlet is formed in the bottom of a lifting pipe. A powder inlet is formed in the lower portion of the lifting pipe. The top of the lifting pipe is connected with a feeding bin through a quick separator. The low-pressure conveying air inlet in the bottom of the lifting pipe is connected with a fan. The powder inlet in the lower portion of the lifting pipe is connected with a crusher through a feeder. A gas outlet in the top of the feeding bin is provided with a gas-solid separator. A feed leg of the gas-solid separator is returned back to the lower middle portion of the feeding bin. One to twelve conical hoppers are arranged at the bottom of the feeding bin. Air inlets are formed in the side walls of the upper portions of the conical hoppers. A fluidization gas chamber is arranged from the middles of the conical hoppers to the bottom of the feeding bin and connected with the fan through a bypass. The feed leg of each conical hopper is connected with an irregularly-shaped hole in an upper fixing valve plate of a powder conveying pump through a valve. A lower stock bin connected with an irregularly-shaped hole in a lower fixing valve plate of the powder conveying pump passes through a check valve and the valve in sequence to be connected with a high-pressure injection pump.
Description
One, technical field
The present invention relates to coal chemical technology, especially, relate to the conveying of coal dust gas.
Two, background technology
Coal gasification is the cleaning of coal and the tap of efficiency utilization and gordian technique.Air flow bed pressurized gasification is the New type coal parallel type gasification technology grown up nearest decades, vaporized chemical and coal dust or coal slurry enter vaporizing chamber through nozzle, the pyrolysis of coal, burning and gasification reaction almost carry out simultaneously, high temperature ensure that high efficiency gasification, and the mineral matter in coal leaves gasification furnace after becoming slag.Compared with other gasification technologies, pressurized entrained-bed gasification temperature is high, processing capacity large, gas effective constituent is high, gasification efficiency is high, is the developing direction of current one of state-of-the-art Coal Gasification Technology, future coal synthesis type gasification technology in the world.
Pressurized entrained-bed vapor pressure is higher, and dry coal powder pressure gasifying adopts high pressure nitrogen or CO
2dry powder is close manages defeated mutually, enters gasification furnace by gasification nozzle, has that coal adaptability is wide, consumption of raw materials is low, efficiency of carbon con version is high, cold gas efficiency is high, and gasification furnace structure is with technical advantages such as slag anti-slag, life-span are long.Under gasification furnace conditioned disjunction coal same case, than coal water slurry gasification technology joint oxygen 16 ~ 21%, economize on coal 2 ~ 4%, effective gas composition is high 6 ~ 10 percentage points.But managing defeated fine breeze mutually because excess pressure is close can cause powder flowing characteristic to change, thus cause difficulty of transportation, affect device smooth operation, therefore dry powder pressurized gasification can only be not more than 4.0Mpa at present, and pressure is higher, gasification furnace stable operation difficulty is larger; In addition because high densification is managed defeated mutually, need dry coal dust moisture to be less than 1%, need larger energy consumption for drying; Synthesis gas also needs to continue compression pressurization and could be used for downstream synthesis technique in addition.From high-pressure synthesis, dry powder pressurized gasification system energy consumption is higher than water coal slurry pressure gasification.
In order to solve a difficult problem for pressurization of dry pulverized coal and continus convergence, first Texaco company creates coal-water slurry gasification.Compare with dry pulverized coal feeding manner, the sharpest edges that coal water slurry charging has are to be easy to pressurization, and the operating pressure grade of commercialized devices, generally between 2.6 ~ 8.5MPa, is convenient to meet multiple downstream process gaseous tension demand.High-pressure gasified can be not only that the downstream process such as methyl alcohol, acetic acid saves intermediate compression operation, also reduces energy consumption; Feed coal transport, slurrying, to be pumped into furnace system simpler than dried coal powder pressurized gasification, safety and easily control, reduced investment; Gasification furnace structure is simple, is lining of fire brick, easily manufactured, cost is low.But in coal water slurry, the water evaporation of nearly 40% needs to absorb a large amount of heat, thus makes cold gas efficiency reduce, and oxygen consumption, coal consumption increase; The paste-forming properties of coal-water fluid concentration to coal has requirement, has strict demand to the ash content in coal and ash fusibility, and these require that the Application Range causing coal narrows, particularly for the faulty coal that calorific value is too low, and coal water slurry charging poor effect; Gasification furnace fire brick is shorter for service life, is generally 1 ~ 2 year; Gasifier nozzle is shorter for service life.
Water coal slurry pressure gasification and dry coal powder pressure gasifying respectively have superiority, and have half share.If but solved a coal dust high-pressure delivery difficult problem, the requirement of coal dust liquid water content would be relaxed, vapor pressure is further enhanced, and need not outside high pressure nitrogen and CO
2high pressure gas agent is not only when diluted phase transport gas but also be atomization gas and work gas, and so dry coal powder pressure gasifying will have more advantage, significantly can reduce the energy consumption of synthetic briquette gasification, increasing the competitive power of Coal Chemical Industry, is also one of hope and focus that Coal Gasification Technology obtains great-leap-forward breakthrough.Therefore develop low energy consumption, powder high-pressure delivery technology and device that is simple to operate, reliable, reduced investment is one of current entrained flow bed gasification technology difficult problem urgently to be resolved hurrily.
Three, summary of the invention
Object of the present invention is exactly to overcome defect that existing powder close phase high-pressure delivery technique exists and not enough and provide a kind of powder low energy consumption high-pressure delivery to equip, have that delivery pressure is high, flow process is simple, easy and simple to handle, reliable, energy consumption and the advantage such as investment is low, the requirement of branch of industry can be met for coal gasification.
Technical scheme of the present invention:
The invention provides a kind of powder high-pressure delivery equipment, primarily of blower fan, raising pipe, feeding bin, gas-solid separator, broach hopper, induction opening, dipleg, upper fixing valve plate, middle rotary valve, intermediate bunker, lower fixing valve plate, bottom feed bin, HP jetting pump, raising pipe top, low-pressure delivery wind entrance, powder entrance, crusher, feeder, gas vent, fluidisation air chamber, valve, powder conveying pump, boiler check valve, be grouped into soon.It is characterized in that being provided with low-pressure delivery wind entrance bottom raising pipe, bottom is provided with powder entrance, raising pipe top is connected with feeding bin by fast point; Low-pressure delivery wind entrance connecting fan bottom raising pipe, the powder entrance of bottom is connected by feeder with crusher; The outlet of feeding bin top gas is provided with gas-solid separator, and the dipleg of gas-solid separator turns back to feeding bin middle and lower part, and the bottom of feeding bin is provided with 1-12 broach hopper; Broach hopper upper portion side wall arranges induction opening, in the middle part of broach hopper, be provided with fluidisation air chamber bottom feeding bin, and all broach hoppers are enclosed in fluidized gas indoor, and fluidisation air chamber is connected by bypass with blower fan; Powder conveying pump is composed in series by center shaft by upper fixing valve plate, middle rotary valve and lower fixing valve plate, fix valve plate up and down and circumferentially have with middle rotary valve the different in nature hole that 1-20 is individual, size is identical, the different in nature hole of middle rotary valve defines intermediate bunker; The dipleg of each broach hopper is connected with the upper fixing valve plate opposite sex hole of powder conveying pump by valve, and the bottom feed bin that the lower fixing valve plate opposite sex hole of powder conveying pump is connected successively is connected with HP jetting pump with valve by boiler check valve.
Blower fan can be centrifugal blower or roots blower, and pressure is 0.003MPa-0.03MPa, and delivery head is 3m-50m.
Fast point can be centrifugal cyclone device, horizontally usedly to revolve, T-shaped fast point or bent-tube boiler divide soon.
Feeder can be star-like rotary table feeder, feeding screw or injection feeder
Feeding bin powder is for being bubbling fluidization state.
Gas-solid separator can be centrifugal cyclone device, horizontally used to revolve, bag dust collector, electrostatic precipitator or chimney filter dust exhaustor.
The conveying gaseous tension of HP jetting pump is 2.6MPa-10MPa, and fed distance is 0.1m-50m.
Four, accompanying drawing explanation
Accompanying drawing is structural representation of the present invention.
The drawing of accompanying drawing is established bright as follows:
1. blower fan, 2. raising pipe, 3. feeding bin, 4. gas-solid separator, 5. broach hopper, 6. induction opening, 7. dipleg, 8. on, fix valve plate, 9. middle rotary valve, 10. intermediate bunker, 11. times fixing valve plates, 12. bottom feed bins, 13. HP jetting pumps, 14. raising pipe tops, 15. low-pressure delivery wind entrances, 16. powder entrances, 17. crushers, 18. feeders, 19. gas vents, 20. fluidisation air chambers, 21. valves, 22. powder conveying pumps, 23. center shafts, 24. profiled holes, 25. boiler check valve, 26. divide soon
Below in conjunction with drawings and Examples in detail constructional feature of the present invention is described in detail.
Five, detailed description of the invention
The invention provides a kind of powder low energy consumption high-pressure delivery equipment, primarily of blower fan (1), raising pipe (2), feeding bin (3), gas-solid separator (4), broach hopper (5), induction opening (6), dipleg (7), upper fixing valve plate (8), middle rotary valve (9), intermediate bunker (10), lower fixing valve plate (11), bottom feed bin (12), HP jetting pump (13), raising pipe top (14), low-pressure delivery wind entrance (15), powder entrance (16), crusher (17), feeder (18), gas vent (19), fluidisation air chamber (20), valve (21), powder conveying pump (22), center shaft (23), profiled holes (24), boiler check valve (25), fast point of (26) composition.It is characterized in that raising pipe (2) bottom is provided with low-pressure delivery wind entrance (15), bottom is provided with powder entrance (16), raising pipe top (14) are connected with feeding bin (3) by fast point (26); Low-pressure delivery wind entrance (15) connecting fan (1) of raising pipe (2) bottom, the powder entrance (16) of bottom is connected by feeder (18) with crusher (17); The gas vent (19) at feeding bin (3) top is provided with gas-solid separator (4), and the dipleg of gas-solid separator (4) turns back to feeding bin (3) middle and lower part, and the bottom of feeding bin (3) is provided with 1-12 broach hopper (5); Broach hopper (5) upper portion side wall arranges induction opening (6), from broach hopper (5) middle part, feeding bin (3) bottom is provided with fluidisation air chamber (20), be enclosed in by all broach hoppers (5) in fluidisation air chamber (20), fluidisation air chamber (20) is connected by bypass with blower fan (1); Powder conveying pump (22) is composed in series by center shaft (23) by upper fixing valve plate (8), middle rotary valve (9) and lower fixing valve plate (11), fix valve plate up and down and circumferentially have with middle rotary valve the different in nature hole (24) that 1-20 is individual, size is identical, the different in nature hole (24) of middle rotary valve (9) defines intermediate bunker (10); The dipleg (7) of each broach hopper (5) is connected with upper fixing valve plate (8) the different in nature hole (24) of powder conveying pump (22) by valve (21), and the bottom feed bin (12) that lower fixing valve plate (11) the different in nature hole (24) of powder conveying pump (22) is connected successively is connected with HP jetting pump (13) with valve (21) by boiler check valve (25).
Blower fan (1) can be centrifugal blower or roots blower, and pressure is 0.003MPa-0.03MPa, and delivery head is 3m-50m.
Fast point (26) can be centrifugal cyclone device, horizontally usedly to revolve, T-shaped fast point or bent-tube boiler are divided soon.
Feeder (18) can be star-like rotary table feeder, feeding screw or injection feeder
Feeding bin (3) powder is for being bubbling fluidization state.
Gas-solid separator (4) can be centrifugal cyclone device, horizontally used to revolve, bag dust collector, electrostatic precipitator or chimney filter dust exhaustor.
The conveying gaseous tension of HP jetting pump (13) is 2.6MPa-10MPa, and fed distance is 0.1m-50m.
Embodiment 1, during carrying out practically, after coal powder is broken into the fine breeze being less than 150 μm by crusher (17), a large amount of gases of blower fan (1) are utilized to enter raising pipe (2) by low-pressure delivery wind entrance (15), the fine breeze that powder entrance (16) from raising pipe (2) bottom adds is transported to raising pipe top (14), then by fast point (26), fine breeze is transported to feeding bin (3), the gas of conveying is by outer row after gas-solid separator (4) recovery fine breeze.A small amount of gas of blower fan (1) is linked into fluidisation air chamber (20) by bypass, then spraying into from broach hopper (5) upper portion side wall induction opening (6) makes fine breeze feeding bin (3) form fluidisation state, fine breeze flows into broach hopper (5) dipleg (7), is flow in the different in nature hole of the upper fixing valve plate (8) of powder conveying pump (22) by valve (21); When the profiled holes (24) of upper fixing valve plate (8) and middle rotary valve (9) is intersected and overlaps, fine breeze flows into the intermediate bunker (10) of powder conveying pump centre rotary valve (9) by the profiled holes (24) of upper fixing valve plate (8); The intermediate bunker (10) that duff powder is housed horizontally rotates fast around main spindle (23), through sealing surface, fine breeze is transferred to the bottom feed bin (12) be connected with the perforate of lower fixing valve plate (11); The fine breeze of bottom feed bin (12) successively flows to HP jetting pump (13) by boiler check valve (25) and valve (21), by atomization in high-pressure gasified diluted phase transport to powdered coal pressuring gasified stove and gasification, thus achieve the staggered discharge conveying of fine breeze from low pressure to high pressure, both solved and closely managed defeated fine breeze mutually due to excess pressure fine breeze flow characteristic can be caused to change, thus cause difficulty of transportation, affect a difficult problem for device smooth operation; Again reduce the rigors to coal dust liquid water content, thus decrease energy consumption for drying; Also achieve some conveying, Multi-point discharging under low pressure, considerably reduce investment and process complexity, safety of operation easily control.
Blower fan (1) pressure is 0.02MPa, and delivery head is 20m.
Feeding bin (3) powder is for being bubbling fluidization state.
The conveying gaseous tension of HP jetting pump (13) is 2.6MPa-10MPa, and fed distance is that 0.5m sprays into the reaction of gas flow bed pressurizing gasifying furnace generating gasification.
Embodiment 2: coal dust is replaced with coke powder, blower fan (1) pressure is 0.03MPa, and delivery head is 50m, and all the other are constant.
Powder low energy consumption high-pressure delivery equipment provided by the present invention, exported by low pressure lifting, fluidisation state sub-material, horizontally rotate staggered discharge, utilize high-pressure work gas by HP jetting pump suction conveying, powder flowing performance is hardly by gas pressure variations influence, and the requirement severity of coal dust liquid water content is reduced greatly, solve from source and closely manage defeated fine powder body mutually due to excess pressure powder flowing characteristic can be caused to change, thus cause difficulty of transportation, affect a difficult problem for device smooth operation, avoid and use outside high pressure nitrogen or CO
2, increase cost and powder and need the significant deficiency over-drying, energy consumption is high.From pilot-scale experiment, the densification of relative powder height is managed defeated mutually, and energy-conservation more than 70%, reduce conveying cost and investment more than 50%.
In low pressure elevating hopper, achieve some conveying, Multi-point discharging by fluidization, considerably reduce investment and equipment complexity, the powder conveying pump horizontally rotated interlocks discharge, work gas HP jetting pump suction diluted phase transport, achieve to low energy consumption the diluted phase transport of powder from low pressure to high pressure, safety of operation also easily controls, avoid the pollution of extraneous gas, leak tightness is strong, delivery pressure is up to 10MPa, far away higher than the current close 4.0Mpa managing defeated fine powder body mutually, can compare favourably with water slurry conveying technology, for dry coal powder pressure gasifying, vaporized chemical high pressure diluted phase transport and atomization, significantly reduce the energy consumption of synthetic briquette gasification, increase the competitive power of dry coal powder pressure gasifying and Coal Chemical Industry, make Coal Gasification Technology obtain great-leap-forward to break through.
Claims (7)
1. a powder low energy consumption high-pressure delivery equipment, primarily of blower fan, raising pipe, feeding bin, gas-solid separator, broach hopper, induction opening, dipleg, upper fixing valve plate, middle rotary valve, intermediate bunker, lower fixing valve plate, bottom feed bin, HP jetting pump, raising pipe top, low-pressure delivery wind entrance, powder entrance, crusher, feeder, gas vent, fluidisation air chamber, valve, powder conveying pump, boiler check valve, be grouped into soon, it is characterized in that bottom raising pipe, being provided with low-pressure delivery wind entrance, bottom is provided with powder entrance, raising pipe top is connected with feeding bin by fast point, low-pressure delivery wind entrance connecting fan bottom raising pipe, the powder entrance of bottom is connected by feeder with crusher, the outlet of feeding bin top gas is provided with gas-solid separator, and the dipleg of gas-solid separator turns back to feeding bin middle and lower part, and the bottom of feeding bin is provided with 1-12 broach hopper, broach hopper upper portion side wall arranges induction opening, in the middle part of broach hopper, be provided with fluidisation air chamber bottom feeding bin, and all broach hoppers are enclosed in fluidized gas indoor, and fluidisation air chamber is connected by bypass with blower fan, powder conveying pump is composed in series by center shaft by upper fixing valve plate, middle rotary valve and lower fixing valve plate, fix valve plate up and down and circumferentially have with middle rotary valve the different in nature hole that 1-20 is individual, size is identical, the different in nature hole of middle rotary valve defines intermediate bunker, the dipleg of each broach hopper is connected with the upper fixing valve plate opposite sex hole of powder conveying pump by valve, and the bottom feed bin that the lower fixing valve plate opposite sex hole of powder conveying pump is connected successively is connected with HP jetting pump with valve by boiler check valve.
2. a kind of powder low energy consumption high-pressure delivery equipment according to claims (1), it is characterized in that said blower fan can be centrifugal blower or roots blower, pressure is 0.003MPa-0.03MPa, and delivery head is 3m-50m.
3. a kind of powder low energy consumption high-pressure delivery equipment according to claims (1), it is characterized in that said fast point can be centrifugal cyclone device, horizontally usedly to revolve, T-shaped fast point or bent-tube boiler divide soon.
4. a kind of powder low energy consumption high-pressure delivery equipment according to claims (1), is characterized in that said feeder can be star-like rotary table feeder, feeding screw or injection feeder.
5. a kind of powder low energy consumption high-pressure delivery equipment according to claims (1), is characterized in that said feeding bin powder is for being bubbling fluidization state.
6. a kind of powder low energy consumption high-pressure delivery equipment according to claims (1), it is characterized in that said gas-solid separator can be centrifugal cyclone device, horizontally usedly to revolve, bag dust collector, electrostatic precipitator or chimney filter dust exhaustor.
7. a kind of powder low energy consumption high-pressure delivery equipment according to claims (1), it is characterized in that the conveying gaseous tension of said HP jetting pump is 2.6MPa-10MPa, fed distance is 0.1m-50m.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964308A (en) * | 2015-07-03 | 2015-10-07 | 无锡市特能机电有限公司 | Hot coal gas system of positive-pressure type biomass powder coal powder fluidization entrained-bed gasification furnace |
| CN106152114A (en) * | 2015-04-14 | 2016-11-23 | 中国电力工程顾问集团华北电力设计院有限公司 | Supercritical CFB Boiler loss protecting device |
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| CN2616514Y (en) * | 2002-12-31 | 2004-05-19 | 中国石化集团齐鲁石油化工公司 | Powder material conveying apparatus |
| CN203714826U (en) * | 2013-09-24 | 2014-07-16 | 中国石油大学(华东) | Powder low energy consumption high-pressure conveying equipment |
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Patent Citations (5)
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| EP0268126A1 (en) * | 1986-11-15 | 1988-05-25 | Präzisions-Werkzeuge AG | Method for increasing the amount of powder delivered to a powder-coating apparatus, and powder-coating apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106152114A (en) * | 2015-04-14 | 2016-11-23 | 中国电力工程顾问集团华北电力设计院有限公司 | Supercritical CFB Boiler loss protecting device |
| CN106152114B (en) * | 2015-04-14 | 2018-07-17 | 中国电力工程顾问集团华北电力设计院有限公司 | Supercritical CFB Boiler loss protecting device |
| CN104964308A (en) * | 2015-07-03 | 2015-10-07 | 无锡市特能机电有限公司 | Hot coal gas system of positive-pressure type biomass powder coal powder fluidization entrained-bed gasification furnace |
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| CN104444374B (en) | 2016-05-11 |
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