CN103789044A - Coal powder conveying device - Google Patents
Coal powder conveying device Download PDFInfo
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- CN103789044A CN103789044A CN201410030708.1A CN201410030708A CN103789044A CN 103789044 A CN103789044 A CN 103789044A CN 201410030708 A CN201410030708 A CN 201410030708A CN 103789044 A CN103789044 A CN 103789044A
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- 239000003245 coal Substances 0.000 title claims abstract description 78
- 239000000843 powder Substances 0.000 title abstract description 23
- 239000007789 gas Substances 0.000 claims abstract description 79
- 239000012159 carrier gas Substances 0.000 claims abstract description 23
- 239000002817 coal dust Substances 0.000 claims description 71
- 239000000463 material Substances 0.000 claims description 19
- 238000001514 detection method Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000011067 equilibration Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000002309 gasification Methods 0.000 abstract description 12
- 230000009467 reduction Effects 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000005243 fluidization Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012791 sliding layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention relates to a coal powder conveying device which comprises a coal grinder, wherein a raw coal inlet is formed in the coal grinder; an outlet of the coal grinder is connected with an inlet of a coal powder filter; an outlet positioned in the lower side of the coal powder filter is connected with a spiral feeder, a normal pressure cabin and a lock bucket through pipelines in sequence from top to bottom; an outlet pipeline of the lock bucket is communicated with a carrier gas pipeline and is connected with an inlet of a feeding cabin above the coal powder filter through the carrier gas pipeline; an outlet in the bottom of the feeding cabin is connected with a mechanical feeding device below the feeding cabin; an outlet positioned in the lower side of the mechanical feeding device is connected with a gas coning part and a burning nozzle of a gasification furnace through pipelines in sequence from top to bottom, and coal powder is sprayed into the gasification furnace through the burning nozzle; the burning nozzle of the gasification furnace is lower than the feeding cabin, and the lock bucket is arranged below the burning nozzle of the gasification furnace. The coal powder conveying device has the characteristics of stability in coal powder conveying, accuracy in metering, energy conservation, consumption reduction and the like, and is capable of reducing carrier gas entering the furnace.
Description
Technical field
The present invention relates to the e Foerderanlage in a kind of coal chemical technology, particularly about a kind of pulverized coal conveying device being applied in air flow bed coal dust gasification.
Background technology
Gasification is the efficient core technology of utilizing of Coal Clean, is also the tap of the process industrials such as Coal Chemical Industry, integrated gasification combined cycle for power generation, direct reduction iron making.It is wide that coal dust gasification has coal adaptability, effectively gas composition is high, than coal consumption with than advantages such as oxygen consumption are low, be the important directions of current entrained flow gasification development, it is the gordian technique in breeze airflow bed gasification technology that continuous, stable, accurate controlled coal dust is supplied with technology.The existing e Foerderanlage that is applied to air flow bed coal dust gasification mainly contains two kinds of modes: one is take Shell as representative; Another kind is take GSP as representative.These two kinds of pulverized coal conveying devices all adopt lock hopper technology, by lock hopper, coal dust are delivered to feed hopper from normal pressure storehouse, and coal dust in feed hopper after fluidisation, then adopts carrier gas (N
2or CO
2) coal dust is delivered to gasifier nozzle by close mode of carrying mutually.What both were different is the discharge method difference of feed hopper, and Shell adopts the form from feed hopper bottom discharge, and GSP adopts from feed hopper top discharge.Close conveying is mutually wider in air flow bed coal dust delivery application at present, technology is relatively ripe, its conveying gas speed is between 8～15m/s, coal dust distributes and is inhomogeneous in pipeline, but be obvious laminar flow, upper strata is suspension fluid layer, and lower floor is the sliding layer of particle swarm along tube wall, carries solid and gas mass ratio generally between 10～100kg/kg.Shell and GSP coal powder conveying system are all that feed hopper from being positioned at low level is by close mode of carrying mutually, directly be delivered to the vapourizing furnace that is positioned at high level, whole coal dust course of conveying adopts complicated sequence logical control works fine, therefore the homogeneity and the stability requirement that coal dust in coal dust course of conveying are distributed are fine, for guaranteeing the steady running of whole system, carry solid-gas ratio comparatively responsive to coal dust.If solid-gas ratio is lower, energy consumption is high, less economical, and pipe wear is serious; If solid-gas ratio exceedes the close solid-gas ratio scope of carrying mutually, to carry unstablely, flow rate fluctuation is violent.But the pulverized coal conveying device of the close phase mode of movement of existing employing still comes with some shortcomings: 1, coal dust conveying is unstable, and fluctuation is larger, affects vapourizing furnace steady running.2, coal powder metering tolerance range lower and be difficult to control.3, delivery of carrier gas usage quantity is larger, and solid-gas ratio is difficult to improve, and because the carrier gas of pulverized coal conveying all enters in vapourizing furnace, therefore finally affects vapourizing furnace aerogenesis quality.4, appliance arrangement is many, and especially Detection & Controling equipment is many, has adopted complicated sequential control, regulating loop and technique interlocking, and whole e Foerderanlage robustness is poor.5, existing pulverized coal conveying device, is difficult to break through the above transfer pressure of 4MPa.6, existing pulverized coal conveying device, is carried to high-order vapourizing furnace by the feed hopper of low level, therefore increases and carries difficulty.7, when lock hopper is reinforced to feed hopper, is subject to lock hopper coal dust gravity impacts because breeze material position is instantaneous, " coal dust static pressure difference " increases severely, the instantaneous powder fluidized that has a strong impact on feed hopper gas coning of meeting, and feeding coal reduces sharply, the big ups and downs of vapourizing furnace pressure.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of pulverized coal conveying device, this device can effectively improve into the stability of stove coal dust conveying and the accuracy of metering, and effectively solves into problems such as stove carrier gas are large.
For achieving the above object, the present invention takes following technical scheme: a kind of pulverized coal conveying device, is characterized in that: it comprises the burner in coal pulverizer, coal fine filter, screw feeder, normal pressure storehouse, lock hopper, feed hopper, mechanical feeding device, gas coning, vapourizing furnace and vapourizing furnace; On described coal pulverizer, be provided with raw coal entrance, and the outlet of described coal pulverizer connects described coal fine filter entrance by pipeline; Be positioned at described coal fine filter below, described coal fine filter outlet connects described screw feeder, normal pressure storehouse and lock hopper by the road from top to bottom successively; Described lock hopper export pipeline with is communicated with for inputting the gas-carrier pipeline that carrier gas transmission coal dust uses, connect the described feed hopper import being positioned at above described vapourizing furnace burner through described gas-carrier pipeline; Described feed hopper outlet at bottom connects described mechanical feeding device, and described mechanical feeding device is positioned at described feed hopper below; Be positioned at described mechanical feeding device below, described mechanical feeding device outlet connects the burner of described gas coning and vapourizing furnace by the road from top to bottom successively, and coal dust sprays and enters described vapourizing furnace through described burner; The burner position of described vapourizing furnace is lower than the position of described feed hopper, and horizontal installation site, described normal pressure storehouse is higher than described lock hopper, and the horizontal installation site of described feed hopper is higher than described lock hopper, and described lock hopper is positioned at described vapourizing furnace burner below.
Described mechanical feeding device adopts rotary pocket feeder or screw feeder; When described mechanical feeding device adopts screw feeder, described screw feeder one end is placed in described feed hopper, and the other end connects described gas coning.
Described feed hopper and mechanical feeding device and described gas coning are arranged to integral structure, and described feed hopper bottom is included in described gas coning inside, and described mechanical feeding device is all included in described gas coning inside, and are positioned at described gas coning internal upper part; And described mechanical feeding device one end connects described feed hopper, and the other end is positioned at described gas coning.
Described gas coning adopts metal sintering mode to make sandwich structure, described gas coning top is also connected with vapor pipe, and in described gas coning, be provided with for described feed hopper equilibrium pressure and by too much coal dust through described vapor pipe be back to the equilibration tube of described feed hopper and for detection of described gas coning in breeze material position whether exceed the coal dust liquid level detection device of predetermined material level scope.
On pipeline on the pipeline between described normal pressure storehouse and described lock hopper, on the pipeline of described lock hopper exit and between described gas-carrier pipeline and described feed hopper, be provided with coal dust control valve; Between described normal pressure storehouse and described lock hopper, be also connected with pressure equilibrium pipeline, on described pressure equilibrium pipeline, be provided with pressure-balanced valve; In described lock hopper, be also provided with pressure relief pipe and pressurising pipeline.
The carrier gas of using for delivery of coal dust in described gas-carrier pipeline is delivered in described feed hopper in the mode of plug flow or Dense Phase Pneumatic Conveying; Described feed hopper bottom is provided with taper flow gasifying device, and described feed hopper outlet at bottom is conical outlet, and this conical outlet is more than one, and described in each, conical outlet is correspondingly provided with a described mechanical feeding device; In described feed hopper, be also provided with pressure relief pipe, pressurising pipeline and pressure-balanced valve, the breeze material position in described feed hopper and pressure must maintain definite value and pressure higher than the pressure in described vapourizing furnace.
Described gas coning adopts from high to low feeding style downwards to gasifier nozzle feeding.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the technical solution used in the present invention has overcome the deficiency of existing pulverized coal conveying device, solved entrained flow gasification enter stove coal dust carry unstable, metering is not high with control accuracy, enter the problems such as stove carrier gas is large, finally make coal powder conveying system meet gasifier operation requirement.2, the present invention is because the carrier gas of using for delivery of coal dust in gas-carrier pipeline is delivered to coal dust in the mode of plug flow the feed hopper that is positioned at vapourizing furnace top from lock hopper, and solid-gas ratio is higher, and carrier gas usage quantity still less, energy-saving and cost-reducing.3, the present invention is because coal dust is from the mode blanking with gravity in feed hopper, then by mechanical feeding device control feed, can realize accurate control and the metering of coal dust.4, the discharging position of existing coal powder conveying system feed hopper is low compared with vapourizing furnace, in the technical solution used in the present invention due to feed hopper compared with vapourizing furnace in higher position, therefore to vapourizing furnace automatic powder feeding system by existing low level to high-order powder feeding, change into high-order to low level powder feeding.Because feed hopper internal pressure is constant, the abundant fluidisation of coal dust, controls feed in conjunction with machinery, can realize continuously and stably feeding, and can effectively reduce the load volume entering in vapourizing furnace.5, the impact of " material level static pressure difference " when the present invention is fed in raw material by lock hopper no longer due to the material level of gas coning, therefore fluidisation is more abundant, and feed is more stable.The present invention can extensively apply in coal chemical technology.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, the invention provides a kind of pulverized coal conveying device, in this device, coal dust is mainly to adopt by the mode of mechanical feed, and air conveying mode is the auxiliary vapourizing furnace of sending into.The present invention includes the burner 10 in coal pulverizer 1, coal fine filter 2, screw feeder 3, normal pressure storehouse 4, lock hopper 5, feed hopper 6, mechanical feeding device 7, gas coning 8, vapourizing furnace 9 and vapourizing furnace 9.On coal pulverizer 1, be provided with raw coal entrance 11, and coal pulverizer 1 exports by pipeline and connects coal fine filter 2 entrances.Be positioned at coal fine filter 2 belows, coal fine filter 2 exports and is connected with by the road screw feeder 3, normal pressure storehouse 4 and lock hopper 5 from top to bottom in turn, and screw feeder 3 belongs to mechanical feeding device.Lock hopper 5 export pipelines be communicated with for inputting the gas-carrier pipeline 12 that carrier gas transmission coal dust uses, connect through gas-carrier pipeline 12 feed hopper 6 imports that are positioned at vapourizing furnace 9 burner 10 tops.Feed hopper 6 outlet at bottoms connect mechanical feeding device 7, and mechanical feeding device 7 is positioned at feed hopper 6 belows; Be positioned at mechanical feeding device 7 belows, mechanical feeding device 7 exports and connects successively by the road the burner 10 in gas coning 8 and vapourizing furnace 9 from top to bottom, and coal dust sprays and enters vapourizing furnace 9 through burner 10.Wherein, the position of burner 10 is lower than the position of feed hopper 6, and horizontal installation site, normal pressure storehouse 4 is higher than lock hopper 5, and the horizontal installation site of feed hopper 6 is higher than lock hopper 5, and lock hopper 5 is positioned at vapourizing furnace 9 burner 10 belows.
In above-described embodiment, mechanical feeding device 7 can adopt other mechanism such as rotary pocket feeder or screw feeder.In the time that mechanical feeding device 7 adopts screw feeder, screw feeder one end is placed in feed hopper 6, the other end connects gas coning 8, the gas coning 8 that is positioned at screw feeder below sent into the coal dust in feed hopper 6 continuously by screw feeder, and the coal dust amount in gas coning 8 of entering can accurately be controlled by screw feeder the flow of coal dust.Enter after the powder fluidized in gas coning 8, under the acting in conjunction of pressure difference and coal dust self gravitation, adopt a small amount of carrier gas to send in the burner 10 of vapourizing furnace 9, coal dust and vaporized chemical are sprayed and are entered vapourizing furnace by burner 10.
In the various embodiments described above, feed hopper 6 and mechanical feeding device 7 also can be arranged to integral structure with gas coning 8, its concrete structure is: feed hopper 6 bottoms are included in gas coning 8 inside, and mechanical feeding device 7 is all included in gas coning 8 inside, and is positioned at gas coning 8 internal upper parts; And mechanical feeding device 7 one end connect feed hopper 6, and the other end is positioned at gas coning 8.When work, machinery feeding device 7 falls into the coal dust in feed hopper 6 in gas coning 8 by the type of transmission such as mechanical overturn or rotation, coal dust after the interior abundant fluidisation of gas coning 8 under the acting in conjunction of pressure difference and gravity, adopt a small amount of carrier gas to send in gasifier nozzle, coal dust and vaporized chemical are sprayed and are entered vapourizing furnace 9 by burner 10.
In the various embodiments described above, gas coning 8 adopts from high to low feeding style downwards to burner 10 feeding styles in vapourizing furnace 9.Gas coning 8 adopts metal sintering mode to make sandwich structure, in this interlayer, is full of fluidized wind, for the coal dust in abundant fluidisation gas coning 8.Gas coning 8 tops are also connected with vapor pipe 13, and in gas coning 8, are provided with equilibration tube and coal dust liquid level detection device (not shown), and equilibration tube is used for feed hopper 6 equilibrium pressures and too much coal dust is back to feed hopper 6 through vapor pipe 13; Whether coal dust liquid level detection device exceeds predetermined material level scope for detection of the interior breeze material position of gas coning 8, if the breeze material position in gas coning 8 is during higher than the predefined breeze material position higher limit of gas coning 8, reduce the pulverized coal flow of mechanical feeding device 7, will after unnecessary powder fluidized, be back to feed hopper 6 from the vapor pipe 13 at gas coning 8 tops; If the breeze material position in gas coning 8 while requiring liquid level lower value lower than the predefined breeze material position of gas coning 8, increases the feeding coal of mechanical feeding device 7 coal dusts, breeze material position in gas coning 8 is remained on and subscribe within the scope of material level.
In the various embodiments described above, on the pipeline on the pipeline between normal pressure storehouse 4 and lock hopper 5, on lock hopper 5 exit pipelines and between gas-carrier pipeline 12 and feed hopper 6, be provided with coal dust control valve 14.Between normal pressure storehouse 4 and lock hopper 5, be also connected with the pressure equilibrium pipeline (not shown) for equilibrium pressure, on pressure equilibrium pipeline, be provided with pressure-balanced valve.In lock hopper 5, be also provided with pressure relief pipe and pressurising pipeline.
In the various embodiments described above, the carrier gas of using for delivery of coal dust in gas-carrier pipeline 12 is delivered in feed hopper 6 in the mode of plug flow or Dense Phase Pneumatic Conveying, and this carrier gas can adopt N
2, CO
2or other rare gas elementes, be filled with the unnecessary gas of feed hopper 6 and emit by the discharge outlet of feed hopper 6, keep feed hopper constant pressure (not shown).
In the various embodiments described above, feed hopper 6 bottoms are provided with taper flow gasifying device (not shown), and feed hopper 6 outlet at bottoms are conical outlet, this conical outlet can be one and also can arrange as required multiple, each conical outlet is correspondingly provided with a mechanical feeding device 7, after powder fluidized in gravity blanking falls into the mechanical feeding device 7 of feed hopper 6 belows.In feed hopper 6, be provided with pressure relief pipe, pressurising pipeline and pressure-balanced valve, the breeze material position in feed hopper 6 and pressure must maintain definite value and pressure higher than the pressure in vapourizing furnace 9.
In the various embodiments described above, burner 10 and vapourizing furnace 9 all adopt mature equipment of the prior art, for compared with maturation process, just repeat no more at this.
In sum, the present invention is in the time of work, raw coal is milled to predefined granularity requirements in raw coal entrance 11 enters coal pulverizer 1, coal dust is transported to coal fine filter 2 inner filtrations by selection by winnowing, after dry through wind-force afterwards, and the coal dust after filtration falls into the screw feeder 3 that is positioned at coal fine filter 2 belows.Screw feeder 3 is sent into lock hopper 5 by coal dust through normal pressure storehouse 4, and the coal dust in lock hopper 5 is delivered to the feed hopper 6 of the interior burner of vapourizing furnace 9 10 tops by the delivery of carrier gas in gas-carrier pipeline 12.What the present invention was different from existing coal powder conveying system mode of movement is, the present invention is directly delivered to coal dust in the interior burner 10 of vapourizing furnace 9 by the feed hopper 6 of the interior burner of vapourizing furnace 9 10 belows, but coal dust is first delivered to the feed hopper 6 that is positioned at vapourizing furnace 9 burner 10 tops by the lock hopper 5 that is positioned at vapourizing furnace 9 burner 10 belows, coal dust is transferred to (in existing coal powder conveying system mode of movement, being the below that gas coning 8 is directly installed on feed hopper 6) in gas coning 8 through the mechanical feeding device 7 of feed hopper 6 bottoms again, finally by gas coning 8 by a small amount of carrier gas by direct being delivered in the burner 10 in vapourizing furnace 9 from the top down after powder fluidized.Stability and the uniformity requirement of therefore carrying flow process to carry coal dust from lock hopper 5 to feed hopper 6 these sections are relatively low, can adopt and carry the plug flow that solid-gas ratio is higher to carry.Meanwhile, because gas coning 8 separates with the indirect of feed hopper 6, the surging force impact that gas coning 8 is no longer stressed on powder fluidized and lock hopper 5 is reinforced, conveying will be more stable, can also under than the higher operating mode of existing transfer pressure, move.
The mode of operation of normal pressure storehouse 4, lock hopper 5 and feed hopper 6 is: normal pressure storehouse 4 adds quantitative coal dust to lock hopper 5, when coal dust in lock hopper 5 reaches predetermined height, close the coal dust control valve 14 between normal pressure storehouse 4 and lock hopper 5, afterwards to the interior pressurising of lock hopper 5, if when the pressure of lock hopper 5 is increased to predetermined pressure, open the coal dust control valve 14 on lock hopper 5 exit pipelines, adopt the mode of plug flow to be delivered in feed hopper 6 by the carrier gas in gas-carrier pipeline 12 coal dust in lock hopper 5.After the coal dust in lock hopper 5 is carried, close the coal dust control valve 14 between lock hopper 5 exits and gas-carrier pipeline 12 and feed hopper 6, then lock hopper 5 is carried out to pressure release to atmospheric pressure state, open afterwards the coal dust control valve 14 between normal pressure storehouse 4 and lock hopper 5, transmit coal dust by normal pressure storehouse 4 to lock hopper 5, so repeatedly.
In the present invention, unless separately had clear and definite explanation or restriction, " top " of indication of the present invention or " below ", if vapourizing furnace is in " below " of feed hopper, can comprise feed hopper directly over vapourizing furnace and oblique upper, or the level height that only represents feed hopper is higher than vapourizing furnace.Similarly, if gas coning is in " below " of feed hopper, can comprise gas coning under feed hopper and tiltedly, or the level height that only represents gas coning is lower than feed hopper.The present invention also includes detecting instrument (as velometer, densometer etc.), pressurising pressure relief pipe, valve etc., does not all draw in the accompanying drawings, understands the present invention but do not affect.The various embodiments described above are only for illustrating the present invention; the connection of each parts and structure all can change to some extent; on the basis of technical solution of the present invention; all improvement and equivalents that according to the principle of the invention, the connection to indivedual parts and structure are carried out, all should not get rid of outside protection scope of the present invention.
Claims (10)
1. a pulverized coal conveying device, is characterized in that: it comprises the burner in coal pulverizer, coal fine filter, screw feeder, normal pressure storehouse, lock hopper, feed hopper, mechanical feeding device, gas coning, vapourizing furnace and vapourizing furnace; On described coal pulverizer, be provided with raw coal entrance, and the outlet of described coal pulverizer connects described coal fine filter entrance by pipeline; Be positioned at described coal fine filter below, described coal fine filter outlet connects described screw feeder, normal pressure storehouse and lock hopper by the road from top to bottom successively; Described lock hopper export pipeline with is communicated with for inputting the gas-carrier pipeline that carrier gas transmission coal dust uses, connect the described feed hopper import being positioned at above described vapourizing furnace burner through described gas-carrier pipeline; Described feed hopper outlet at bottom connects described mechanical feeding device, and described mechanical feeding device is positioned at described feed hopper below; Be positioned at described mechanical feeding device below, described mechanical feeding device outlet connects the burner of described gas coning and vapourizing furnace by the road from top to bottom successively, and coal dust sprays and enters described vapourizing furnace through described burner; The burner position of described vapourizing furnace is lower than the position of described feed hopper, and horizontal installation site, described normal pressure storehouse is higher than described lock hopper, and the horizontal installation site of described feed hopper is higher than described lock hopper, and described lock hopper is positioned at described vapourizing furnace burner below.
2. a kind of pulverized coal conveying device as claimed in claim 1, is characterized in that: described mechanical feeding device adopts rotary pocket feeder or screw feeder; When described mechanical feeding device adopts screw feeder, described screw feeder one end is placed in described feed hopper, and the other end connects described gas coning.
3. a kind of pulverized coal conveying device as claimed in claim 1, it is characterized in that: described feed hopper and mechanical feeding device and described gas coning are arranged to integral structure, described feed hopper bottom is included in described gas coning inside, described mechanical feeding device is all included in described gas coning inside, and is positioned at described gas coning internal upper part; And described mechanical feeding device one end connects described feed hopper, and the other end is positioned at described gas coning.
4. a kind of pulverized coal conveying device as claimed in claim 2, it is characterized in that: described feed hopper and mechanical feeding device and described gas coning are arranged to integral structure, described feed hopper bottom is included in described gas coning inside, described mechanical feeding device is all included in described gas coning inside, and is positioned at described gas coning internal upper part; And described mechanical feeding device one end connects described feed hopper, and the other end is positioned at described gas coning.
5. a kind of pulverized coal conveying device as claimed in claim 1 or 2 or 3 or 4, it is characterized in that: described gas coning adopts metal sintering mode to make sandwich structure, described gas coning top is also connected with vapor pipe, and in described gas coning, be provided with for described feed hopper equilibrium pressure and by too much coal dust through described vapor pipe be back to the equilibration tube of described feed hopper and for detection of described gas coning in breeze material position whether exceed the coal dust liquid level detection device of predetermined material level scope.
6. a kind of pulverized coal conveying device as claimed in claim 1 or 2 or 3 or 4, is characterized in that: on the pipeline on the pipeline between described normal pressure storehouse and described lock hopper, on the pipeline of described lock hopper exit and between described gas-carrier pipeline and described feed hopper, be provided with coal dust control valve; Between described normal pressure storehouse and described lock hopper, be also connected with pressure equilibrium pipeline, on described pressure equilibrium pipeline, be provided with pressure-balanced valve; In described lock hopper, be also provided with pressure relief pipe and pressurising pipeline.
7. a kind of pulverized coal conveying device as claimed in claim 5, is characterized in that: on the pipeline on the pipeline between described normal pressure storehouse and described lock hopper, on the pipeline of described lock hopper exit and between described gas-carrier pipeline and described feed hopper, be provided with coal dust control valve; Between described normal pressure storehouse and described lock hopper, be also connected with pressure equilibrium pipeline, on described pressure equilibrium pipeline, be provided with pressure-balanced valve; In described lock hopper, be also provided with pressure relief pipe and pressurising pipeline.
8. a kind of pulverized coal conveying device as described in claim 1 or 2 or 3 or 4 or 7, is characterized in that: the carrier gas of using for delivery of coal dust in described gas-carrier pipeline is delivered in described feed hopper in the mode of plug flow or Dense Phase Pneumatic Conveying; Described feed hopper bottom is provided with taper flow gasifying device, and described feed hopper outlet at bottom is conical outlet, and this conical outlet is more than one, and described in each, conical outlet is correspondingly provided with a described mechanical feeding device; In described feed hopper, be also provided with pressure relief pipe, pressurising pipeline and pressure-balanced valve, the breeze material position in described feed hopper and pressure must maintain definite value and pressure higher than the pressure in described vapourizing furnace.
9. a kind of pulverized coal conveying device as described in claim 5 or 6 any one, is characterized in that: the carrier gas of using for delivery of coal dust in described gas-carrier pipeline is delivered in described feed hopper in the mode of plug flow or Dense Phase Pneumatic Conveying; Described feed hopper bottom is provided with taper flow gasifying device, and described feed hopper outlet at bottom is conical outlet, and this conical outlet is more than one, and described in each, conical outlet is correspondingly provided with a described mechanical feeding device; In described feed hopper, be also provided with pressure relief pipe, pressurising pipeline and pressure-balanced valve, the breeze material position in described feed hopper and pressure must maintain definite value and pressure higher than the pressure in described vapourizing furnace.
10. a kind of pulverized coal conveying device as described in claim 1 to 9 any one, is characterized in that: described gas coning adopts from high to low feeding style downwards to gasifier nozzle feeding.
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|---|---|---|---|
| CN201410030708.1A CN103789044B (en) | 2014-01-22 | 2014-01-22 | Coal powder conveying device |
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|---|---|---|---|
| CN201410030708.1A CN103789044B (en) | 2014-01-22 | 2014-01-22 | Coal powder conveying device |
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| CN103789044A true CN103789044A (en) | 2014-05-14 |
| CN103789044B CN103789044B (en) | 2015-07-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104560207A (en) * | 2014-12-09 | 2015-04-29 | 煤炭科学技术研究院有限公司 | Gasification device of coal derived industrial gas |
| CN114772215A (en) * | 2022-05-11 | 2022-07-22 | 马鞍山钢铁股份有限公司 | Pneumatic sand adding system and method for electric furnace |
Families Citing this family (1)
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