CN203714826U - Powder low energy consumption high-pressure conveying equipment - Google Patents
Powder low energy consumption high-pressure conveying equipment Download PDFInfo
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- CN203714826U CN203714826U CN201320591136.5U CN201320591136U CN203714826U CN 203714826 U CN203714826 U CN 203714826U CN 201320591136 U CN201320591136 U CN 201320591136U CN 203714826 U CN203714826 U CN 203714826U
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- 239000000843 powder Substances 0.000 title claims abstract description 67
- 238000005265 energy consumption Methods 0.000 title claims abstract description 23
- 238000005243 fluidization Methods 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 16
- 230000006698 induction Effects 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 6
- 230000005587 bubbling Effects 0.000 claims description 4
- 239000012717 electrostatic precipitator Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 description 37
- 238000002309 gasification Methods 0.000 description 33
- 239000007789 gas Substances 0.000 description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 12
- 239000002817 coal dust Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003250 coal slurry Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 239000004484 Briquette Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000011143 downstream manufacturing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- QVGXLLKOCUKJST-IGMARMGPSA-N oxygen-16 atom Chemical compound [16O] QVGXLLKOCUKJST-IGMARMGPSA-N 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- Air Transport Of Granular Materials (AREA)
Abstract
The utility model provides powder low energy consumption high-pressure conveying equipment. A low pressure wind conveying inlet is formed in the bottom of a riser, a powder inlet is formed in the lower part of the riser, and the top of the riser is connected with an upper stock bin through a quick separator; the low pressure wind conveying inlet in the bottom of the riser is connected with a fan, and the power inlet in the lower part of the riser is connected with a crusher through a feeder; a gas-solid separator is arranged at a gas outlet in the top of the upper stock bin, diplegs of the gas-solid separator return to the middle upper part of the upper stock bin, 1 to 12 cone hoppers are arranged at the bottom of the upper stock bin; air inlets are formed in the side walls of the upper parts of the cone hoppers, fluidization air chambers are arranged from the middle parts of the cone hoppers to the bottom of the upper stock bin, and connected with the fan through a bypass; the digleg of each cone hopper is connected with a special hole of an upper fixed valve plate of a power conveying pump through a valve, and a lower stock bin connected with the special hole of a lower fixed valve plate of the power conveying pump is connected with a high pressure jet pump successively through a check valve and the valve.
Description
One, technical field
The present invention relates to coal chemical technology, especially, relate to coal dust gas and carry.
Two, background technology
Coal gasification is the cleaning and efficient tap and the gordian technique of utilizing of coal.Air flow bed pressurized gasification is the New type coal parallel type gasification technology growing 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 has guaranteed high efficiency gasification, and the mineral matter in coal leaves gasification furnace after becoming slag.Compare 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 current developing direction of 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 defeatedly mutually, by gasification nozzle, enters gasification furnace, 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%, effectively gas composition is high 6～10 percentage points.But because excess pressure is close, manage mutually defeated fine breeze and can cause that powder flowing characteristic changes, thereby 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 due to high densification, manage mutually defeatedly, need to be dried coal dust moisture and be less than 1%, need larger energy consumption for drying; In addition synthesis gas also need to continue compression pressurization could be for downstream synthesis technique.From height, be pressed into, dry powder pressurized gasification system energy consumption is higher than water coal slurry pressure gasification.
For a difficult problem that solves pressurization of dry pulverized coal and carry continuously, first Texaco company has created coal water slurry gasification technique.With the comparison of 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 commercialization device generally, between 2.6～8.5MPa, is convenient to meet multiple downstream process gaseous tension demand.High-pressure gasifiedly not only can save intermediate compression operation for the downstream process such as methyl alcohol, acetic acid, also reduce energy consumption; Feed coal transportation, 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 the evaporation of nearly 40% water need to absorb a large amount of heat in coal water slurry, thereby cold gas efficiency is reduced, oxygen consumption, coal consumption are increased; Coal-water fluid concentration has requirement to the paste-forming properties of coal, and the ash content in coal and ash fusibility are had to strict demand, and these requirements have caused the Application Range of coal to narrow down, particularly for the too low faulty coal of calorific value, and coal water slurry charging poor effect; Gasification furnace fire brick is shorter service life, is generally 1～2 year; Gasifier nozzle is shorter 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, coal dust liquid water content would require to relax, vapor pressure is further enhanced, and high pressure nitrogen and CO that need not be outside
2high pressure gas agent is not only worked as dilute phase conveying gas but also be atomization gas and work gas, and dry coal powder pressure gasifying will have more advantage so, can significantly reduce the energy consumption of synthetic briquette gasification, increasing the competitive power of Coal Chemical Industry, is also that Coal Gasification Technology is obtained one of hope that great-leap-forward breaks through and focus.Therefore develop low energy consumption, powder high-pressure delivery technology and device 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 provide a kind of powder low energy consumption high-pressure delivery equipment in order to overcome the defect of the close phase high-pressure delivery of existing powder technique existence with deficiency, 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, for coal gasification, can meet the requirement of branch of industry.
Technical scheme of the present invention:
The invention provides a kind of powder high-pressure delivery equipment, mainly by blower fan, raising pipe, feeding bin, gas-solid separator, broach hopper, induction opening, dipleg, upper fixedly valve plate, middle rotary valve, intermediate bunker, lower fixedly 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 raising pipe bottom is provided with low-pressure delivery wind entrance, bottom is provided with powder entrance, raising pipe top was connected with feeding bin by fast minute; The low-pressure delivery wind entrance connecting fan of raising pipe bottom, 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, from broach hopper middle part, to feeding bin bottom, is provided with fluidisation air chamber, all broach hoppers is enclosed in to 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 fixedly valve plate, middle rotary valve and lower fixedly valve plate, fixedly valve plate has 1-20, big or small identical profiled holes with middle rotary valve along circumference up and down, and the profiled holes of middle rotary valve has formed intermediate bunker; The dipleg of each broach hopper is connected with the upper fixedly valve plate profiled holes of powder conveying pump by valve, and the connected bottom feed bin of lower fixedly valve plate profiled holes of powder conveying pump is successively 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.
Within fast minute, can be centrifugal cyclone device, be horizontally used to revolve, T-shaped fast minute 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, be 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. fixing valve plate on, 9. rotary valve in the middle of, 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, the specific embodiment
The invention provides a kind of powder low energy consumption high-pressure delivery equipment, mainly by blower fan (1), raising pipe (2), feeding bin (3), gas-solid separator (4), broach hopper (5), induction opening (6), dipleg (7), upper fixedly valve plate (8), middle rotary valve (9), intermediate bunker (10), lower fixedly 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 minute (26) form.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 minute (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, to feeding bin (3) bottom, be provided with fluidisation air chamber (20), all broach hoppers (5) are enclosed in fluidisation air chamber (20), and 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 fixedly valve plate (8), middle rotary valve (9) and lower fixedly valve plate (11), fixedly valve plate has 1-20, big or small identical profiled holes (24) with middle rotary valve along circumference up and down, and the profiled holes (24) of middle rotary valve (9) has formed intermediate bunker (10); The dipleg (7) of each broach hopper (5) is connected with upper fixedly valve plate (8) profiled holes (24) of powder conveying pump (22) by valve (21), and the connected bottom feed bin (12) of lower fixedly valve plate (11) profiled holes (24) of powder conveying pump (22) is successively 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 minute (26) can be centrifugal cyclone device, be horizontally used to revolve, T-shaped fast minute 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, be 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 concrete operation, crusher (17) is broken into coal powder after the fine breeze that is less than 150 μ m, utilize a large amount of gases of blower fan (1) to enter raising pipe (2) by low-pressure delivery wind entrance (15), the fine breeze that powder entrance (16) from raising pipe (2) bottom is added is transported to raising pipe top (14), then by fast minute (26), fine breeze is transported to feeding bin (3), the gas of conveying reclaims outer row after fine breeze by gas-solid separator (4).A small amount of gas of blower fan (1) is linked into fluidisation air chamber (20) by bypass, then from broach hopper (5) upper portion side wall induction opening (6), spray into and make fine breeze feeding bin (3) form fluidisation state, fine breeze flows into broach hopper (5) dipleg (7), flows in the profiled holes of the upper fixedly valve plate (8) of powder conveying pump (22) by valve (21); When the profiled holes (24) of upper fixedly valve plate (8) and middle rotary valve (9) is intersected and overlapped, fine breeze flows into the intermediate bunker (10) of the middle rotary valve of powder conveying pump (9) by the profiled holes (24) of upper fixedly 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) being connected with lower fixedly valve plate (11) perforate; The fine breeze of bottom feed bin (12) successively flows to HP jetting pump (13) by boiler check valve (25) and valve (21), by high-pressure gasified dilute phase, be transported to atomization and gasification in powdered coal pressuring gasified stove, thereby having realized the staggered discharge of fine breeze from low pressure to high pressure carries, both solved and closely managed mutually defeated fine breeze and change because excess pressure can cause fine breeze flow characteristic, thereby cause difficulty of transportation, affect a difficult problem for device smooth operation; Reduce again the harsh requirement to coal dust liquid water content, thereby reduced energy consumption for drying; Also under low pressure, realized some conveying, Multi-point discharging, significantly reduced investment and process complexity, safety of operation and easily controlled.
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 to coke powder, and 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, by low pressure promote, fluidisation state sub-material exports, horizontally rotate staggered discharge, utilize high-pressure work gas to aspirate conveying by HP jetting pump, powder flowing performance is subject to gaseous tension variable effect hardly, and the severity that requires to coal dust liquid water content reduces greatly, from source, solved and closely managed mutually defeated fine powder body and change because excess pressure can cause powder flowing characteristic, thereby cause difficulty of transportation, affect the difficult problem of device smooth operation, avoided using outside high pressure nitrogen or CO
2, increase cost and powder needs the significant deficiency over-drying, energy consumption is high.From pilot-scale experiment, the relative high densification of powder is managed defeated, energy-conservation more than 70% mutually, reduces and carries cost and investment more than 50%.
In low pressure elevating hopper, by fluidization, realize some conveying, Multi-point discharging, significantly reduced investment and equipment complexity, the staggered discharge of powder conveying pump horizontally rotating, work gas HP jetting pump suction dilute phase is carried, having realized to low energy consumption the dilute phase of powder from low pressure to high pressure carries, safety of operation is also easily controlled, avoided the pollution of extraneous gas, leak tightness is strong, delivery pressure is up to 10MPa, far away higher than the current close 4.0Mpa that manages mutually defeated fine powder body, can compare favourably with water slurry conveying technology, for dry coal powder pressure gasifying, vaporized chemical high pressure dilute phase is carried 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, making Coal Gasification Technology obtain great-leap-forward breaks through.
Claims (7)
1. a powder low energy consumption high-pressure delivery is equipped, mainly by blower fan, raising pipe, feeding bin, gas-solid separator, broach hopper, induction opening, dipleg, upper fixedly valve plate, middle rotary valve, intermediate bunker, lower fixedly 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 raising pipe bottom is provided with low-pressure delivery wind entrance, bottom is provided with powder entrance, raising pipe top was connected with feeding bin by fast minute, the low-pressure delivery wind entrance connecting fan of raising pipe bottom, 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, from broach hopper middle part, to feeding bin bottom, is provided with fluidisation air chamber, all broach hoppers is enclosed in to 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 fixedly valve plate, middle rotary valve and lower fixedly valve plate, fixedly valve plate has 1-20, big or small identical profiled holes with middle rotary valve along circumference up and down, and the profiled holes of middle rotary valve has formed intermediate bunker, the dipleg of each broach hopper is connected with the upper fixedly valve plate profiled holes of powder conveying pump by valve, and the connected bottom feed bin of lower fixedly valve plate profiled holes of powder conveying pump is successively 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 claim 1, is characterized in that said blower fan can be centrifugal blower or roots blower, and 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 claim 1, is characterized in that it within said fast minute, can being centrifugal cyclone device, is horizontally used to revolve, T-shaped fast minute or bent-tube boiler divide soon.
4. a kind of powder low energy consumption high-pressure delivery equipment according to claim 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 claim 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 claim 1, it is characterized in that said gas-solid separator can be centrifugal cyclone device, be horizontally used to revolve, bag dust collector, electrostatic precipitator or chimney filter dust exhaustor.
7. a kind of powder low energy consumption high-pressure delivery according to claim 1 is equipped, and the conveying gaseous tension that it is characterized in that said HP jetting pump is 2.6MPa-10MPa, and fed distance is 0.1m-50m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591136.5U CN203714826U (en) | 2013-09-24 | 2013-09-24 | Powder low energy consumption high-pressure conveying equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591136.5U CN203714826U (en) | 2013-09-24 | 2013-09-24 | Powder low energy consumption high-pressure conveying equipment |
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| CN203714826U true CN203714826U (en) | 2014-07-16 |
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| CN201320591136.5U Expired - Lifetime CN203714826U (en) | 2013-09-24 | 2013-09-24 | Powder low energy consumption high-pressure conveying equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104444374A (en) * | 2013-09-24 | 2015-03-25 | 中国石油大学(华东) | Low-energy-consumption high-pressure powder conveying device |
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2013
- 2013-09-24 CN CN201320591136.5U patent/CN203714826U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104444374A (en) * | 2013-09-24 | 2015-03-25 | 中国石油大学(华东) | Low-energy-consumption high-pressure powder conveying device |
| CN104444374B (en) * | 2013-09-24 | 2016-05-11 | 中国石油大学(华东) | A kind of powder low energy consumption high-pressure delivery equipment |
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Granted publication date: 20140716 Effective date of abandoning: 20160511 |
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