CN107586565A - A kind of dreg removing system and method - Google Patents
A kind of dreg removing system and method Download PDFInfo
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- CN107586565A CN107586565A CN201710808014.XA CN201710808014A CN107586565A CN 107586565 A CN107586565 A CN 107586565A CN 201710808014 A CN201710808014 A CN 201710808014A CN 107586565 A CN107586565 A CN 107586565A
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Abstract
The present invention relates to Coal Gasification Technology field, more particularly to a kind of dreg removing system and method.The Flow Field Distribution on scum pipe periphery can be improved, avoid the situation that deslagging caused by Flow Field Distribution inequality is unstable and deslagging is obstructed from occurring, and the potential safety hazards such as the abrasion of central jet pipe can be avoided.A kind of dreg removing system, including：Gasification furnace, the bottom of gasification furnace is provided with gas distribution grid, the top of gas distribution grid is gas distribution grid area, the bottom of gas distribution grid extends downward with scum pipe, scum pipe is arranged in the bottom of the gasification furnace, the column slagging channel connected with gas distribution grid area is formed in the bottom of gasification furnace, and passes through connecting short section and slag bucket system connectivity；Connecting short section sets annular gas distributor close to one end of scum pipe, annular gas distributor is used to pass through column slagging channel to gas distribution grid area gas distribution, Swirling Flow is formed in gas distribution grid area, lime-ash is fallen in the presence of Swirling Flow and is discharged by slag bucket system.
Description
Technical field
The present invention relates to Coal Gasification Technology field, more particularly to a kind of dreg removing system and method.
Background technology
Catalytic coal gasifaction technology is a kind of important way that coal cleaning efficiently utilizes, and is the most efficient gas of natural gas from coal
One of change technology.That is gasifying agent of the coal with vapor, hydrogen and carbon monoxide composition under certain pressure and temperature is being catalyzed
Gasification reaction is carried out under the catalytic action of agent, generates the methane of high concentration.
Coal catalytic gasification technique is carried out generally in fluidized-bed gasification furnace, shown in Figure 1, the bottom of fluidized-bed gasification furnace 1
Portion sets conical gas distribution grid 11 and central jet pipe 12, the bottom of the conical gas distribution grid 11 to extend downward with
Scum pipe 13, the bottom of the scum pipe 13 through the gasification furnace 1 connect with slag bucket system 2, and carrying out, catalytic coal gasifaction is anti-
At once, gasifying agent is passed through into the gasification furnace 1 by the gas distribution grid 11 and central jet pipe 12, and coal gasification produces
Lime-ash drained into by the annular space 14 between the scum pipe 13 and the central jet pipe 12 in the slag bucket system 2, herein
During, due to the technological requirement of catalytic coal gasification, solid phase bed is higher in gasification furnace, and pressure is larger, and solid phase can not press
Contracting, gas phase are compressed into small volume, and gasification furnace back-mixing is less violent, by the way of annular space deslagging, on the one hand, central jet
Pipe gas velocity is higher, easily the gas distribution of gas distribution grid and Flow Field Distribution is impacted, and easily cause high-rise gasification
Agent bias current, gas skewness, bed gas-solid distribution is influenceed, and then annular space deslagging, which can be impacted, causes deslagging unstable,
Not even deslagging phenomena such as；On the other hand, annular space deslagging can also be to center jet pipe serious wear, or even causes security incident.
The content of the invention
It is a primary object of the present invention to, there is provided a kind of dreg removing system and method, the flow field on scum pipe periphery can be improved
Distribution, avoid deslagging caused by Flow Field Distribution inequality is unstable and deslagging is obstructed situation from occurring, and can avoid
The potential safety hazards such as the abrasion of heart jet pipe.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
On the one hand, the embodiment of the present invention provides a kind of dreg removing system, including：
Gasification furnace, the bottom of the gasification furnace are provided with gas distribution grid, and the top of the gas distribution grid is gas point
Fabric swatch area, the bottom of the gas distribution grid extend downward with scum pipe, and the scum pipe is arranged in the gasification furnace
Bottom, the column slagging channel connected with the gas distribution grid area is formed in the bottom of the gasification furnace, and it is short by connecting
Section and slag bucket system connectivity；
The connecting short section is provided with annular gas distributor, the annular gas distribution close to one end of the scum pipe
Device is used for by the column slagging channel to gas distribution grid area gas distribution, to form eddy flow in the gas distribution grid area
Flow field so that lime-ash can fall in the presence of Swirling Flow and be discharged by the slag bucket system.
Optionally, the connecting short section is that the vapor being made up of inner cylinder and the overcoat being centered around on the outside of the inner cylinder presss from both sides
Set.
Optionally, the inner cylinder is uniformly to be recessed to have the tubular structure of multiple grooves, the tubular structure towards the overcoat
By being connected towards the groove that the overcoat is uniformly recessed with the overcoat, the vapor chuck is divided into multiple be interconnected
Steam chamber.
Optionally, the groove is circular groove.
Optionally, two adjacent row groove alignments or it is staggered.
Optionally, the annular gas distributor is gas distribution endless tube, and the one side that the gas distribution endless tube is set upward is with concentric
Round form is disposed with least three circle qi-emitting holes, and with diameter, the descending change from outmost turns to innermost circle becomes the qi-emitting hole
Gesture is uniformly distributed, wherein, the angle between vertical section at the gas distribution direction of the qi-emitting hole and its place concentric circles is from most
Outer ring gradually increases to innermost circle, and the angle between horizontal plane is gradually reduced from outmost turns to innermost circle.
Optionally, a diameter of 3-4mm of outmost turns qi-emitting hole, gas distribution direction is straight up；
A diameter of 2-3mm of at least one circle qi-emitting hole from outside to inside, gas distribution direction and the vertical section at the concentric circles of place
Between angle be 15-30 degree, the angle between horizontal plane is 45-80 degree；
A diameter of 1-2mm of at least one circle qi-emitting hole from inside to outside, gas distribution direction and the vertical section at the concentric circles of place
Between angle be 30-50 degree, the angle between horizontal plane is 30-50 degree.
Optionally, the bottom of the connecting short section is additionally provided with least two swirl flow nozzles, the swirl flow nozzle be used for
The mode of eddy flow sprays into water into the connecting short section so that the inwall that lime-ash can be with the connecting short section under the drive of water is sent out
Raw collision.
Optionally, the swirl flow nozzle being arranged circumferentially along the connecting short section.
Optionally, the injection direction of each swirl flow nozzle is obliquely, and with corresponding connecting short section opening position
Vertical section between angle be 20-45 degree.
Optionally, the slag bucket system includes pulp water pond and the slag lock being sequentially communicated from top to bottom；
Water supplement port and liquid level gauge are provided with the pulp water pond；
The first residual cake valve is provided with the pipeline connected between the pulp water pond and the slag lock；
The bottom of the slag lock is provided with the second residual cake valve.
Optionally, the pulp water pond and the bottom of the slag lock are inverted cone-shaped structure.
Optionally, the cone angle of the inverted cone-shaped structure is 50-90 degree.
Optionally, the dreg removing system also includes water washing tank, and the water washing tank is arranged on the lower section of the slag lock, and with institute
State the slag-drip opening connection of slag lock.
On the other hand, the embodiment of the present invention provides a kind of Slagoff method, applied to dreg removing system as described above, including：
Step 1) coal occurs in gasification furnace gasification reaction generation lime-ash；
Step 2) gas distribution into the column slagging channel by the annular gas distributor, leads in the column deslagging
Swirling Flow is formed in road so that lime-ash falls in the presence of the Swirling Flow, and by the slag bucket system by described in
Lime-ash is discharged.
Optionally, when the connecting short section is that the vapor being made up of inner cylinder and the overcoat being centered around on the outside of the inner cylinder presss from both sides
During set, methods described also includes：
Vapor is flowed through to the vapor chuck from bottom to top, the lime-ash with being fallen by the connecting short section is changed
Heat.
Optionally, when the bottom of the connecting short section is additionally provided with least two swirl flow nozzles,
Methods described also includes：
Water into the connecting short section is sprayed into a manner of eddy flow the swirl flow nozzle so that drive of the lime-ash in water
The lower inwall with the connecting short section collides.
Optionally, when the slag bucket system includes the pulp water pond being sequentially communicated from top to bottom and slag lock；On the pulp water pond
It is provided with water supplement port and liquid level gauge；The first residual cake valve is provided with the pipeline connected between the pulp water pond and the slag lock；Institute
When stating the bottom of slag lock and being provided with the second residual cake valve；
So that lime-ash falls in the presence of the Swirling Flow, and is discharged the lime-ash by the slag bucket system,
Specifically include：
Step 21) keeps first residual cake valve to open, and second residual cake valve is closed, and to the slag lock and the slag
Water is filled with pond；
Step 22) makes the lime-ash be fallen into the presence of Swirling Flow in slag lock and pulp water pond filled with water；
Step 23) closes first residual cake valve when the liquid level gauge shows that liquid level reaches setting value, opens described the
Two residual cake valves, the lime-ash in the slag lock is discharged, then, close second residual cake valve, and water is full of into the slag lock；
Step 24) opens first residual cake valve so that the lime-ash in the pulp water pond is fallen into the slag lock, closes institute
The first residual cake valve is stated, opens second residual cake valve, the lime-ash drained into the slag lock is discharged, and close second deslagging
Valve；
Step 25) repeats above step 21), step 22), step 23) and step 24), until caused by will be in gasification furnace
Lime-ash is discharged.
The embodiment of the present invention provides a kind of dreg removing system and method, by the way that the scum pipe is arranged in into the gasification furnace
Bottom, and the column slagging channel connected with the gas distribution grid area is formed in the bottom of the gasification furnace, then pass through connection
Pipe nipple and slag bucket system connectivity, cancel the central jet pipe connected with the gas distribution grid area, the center that can avoid passing through is penetrated
Flow tube is passed through high speed gasifying agent and the gas distribution to gas distribution grid area has an impact so that the flow field in gas distribution grid area point
Cloth is uneven, and the situation of gasifying agent bias current occurs, additionally it is possible to and avoid generative center jet pipe from wearing, and by the connection
Pipe nipple sets annular gas distributor close to one end of the scum pipe, can be by the column slagging channel to the gas
Distribution grid area gas distribution, and Swirling Flow is formed in the gas distribution grid area, overcome the gas above the column slagging channel
The resistance of ash bed in distribution grid area, increases the fluidisation of radial zone area, and the gas for being advantageous to gas distribution grid area is uniform
It is scattered, improve the Flow Field Distribution on scum pipe periphery, so as to avoiding deslagging caused by Flow Field Distribution inequality unstable and
The obstructed situation of deslagging occurs, meanwhile, lime-ash can fall in the presence of Swirling Flow caused by annular gas distributor,
I.e. described lime-ash can be fallen from periphery to Swirl, avoided being formed on the annular gas distributor and built bridge, realize unobstructed
Deslagging.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also be attached according to these
Figure obtains other accompanying drawings.
Fig. 1 is a kind of structural representation for dreg removing system that prior art provides；
Fig. 2 is a kind of structural representation of dreg removing system provided in an embodiment of the present invention；
Fig. 3 is the structural representation that a kind of connecting short section provided in an embodiment of the present invention expands into plane；
Fig. 4 is the structural representation that another connecting short section provided in an embodiment of the present invention expands into plane；
Fig. 5 is provided in an embodiment of the present invention based on structural representations of the Fig. 4 in AA ' directions；
Fig. 6 is a kind of structural representation of annular gas distributor provided in an embodiment of the present invention；
Fig. 7 is the structural representation of another annular gas distributor provided in an embodiment of the present invention；
Fig. 8 is the structural representation of another dreg removing system provided in an embodiment of the present invention；
Fig. 9 is the structural representation of another dreg removing system provided in an embodiment of the present invention；
Figure 10 is the structural representation of another dreg removing system provided in an embodiment of the present invention；
Figure 11 is a kind of schematic flow sheet of Slagoff method provided in an embodiment of the present invention；
Wherein, gasification furnace -1；Gas distribution grid -11；Gas distribution grid area-A；Central jet pipe -12；Scum pipe -13, post
Shape slagging channel-B；Slag bucket system -2；Connecting short section -3；Annular gas distributor -4；Expansion joint -14；Inner cylinder -31；Overcoat-
32；Groove -51；Tubular structure -5；Qi-emitting hole -41；Swirl flow nozzle -6；Pulp water pond -21；Slag lock -22；First water supplement port -211；
Liquid level gauge -212；First residual cake valve-a；Second water supplement port -221；Rinse mouth -222；Balance pipe -7, balanced valve-c；Water washing tank -8；
Agitator -81.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In the description of the invention, it is to be understood that term " " center ", " on ", " under ", "front", "rear", " left side ",
The orientation or position relationship of the instruction such as " right side ", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are based on shown in the drawings
Orientation or position relationship, be for only for ease of the description present invention and simplify description, rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In description of the invention, unless otherwise indicated, " multiple " are meant that two or more.
On the one hand, the embodiment of the present invention provides a kind of dreg removing system, referring to Fig. 2, including：
Gasification furnace 1, the bottom of the gasification furnace 1 are provided with gas distribution grid 11, and the top of the gas distribution grid 11 is
Gas distribution grid area A, the bottom of the gas distribution grid 11 extend downward with scum pipe 13, and the scum pipe 13 is arranged in
The bottom of the gasification furnace 1, formed in the bottom of the gasification furnace 1 and led to the gas distribution grid area A column deslagginves connected
Road B, and connected by connecting short section 3 with slag bucket system 2；
The connecting short section 3 is provided with annular gas distributor 4, the annular gas close to one end of the scum pipe 13
Distributor 4 is used for by the column slagging channel B to the gas distribution grid area A gas distributions, with the gas distribution grid area A
Form Swirling Flow so that lime-ash can fall in the presence of Swirling Flow and be discharged by the slag bucket system 2.
The embodiment of the present invention provides a kind of dreg removing system, by the bottom that the scum pipe 13 is arranged in the gasification furnace 1
Portion, and the column slagging channel B connected with the gas distribution grid area A is formed in the bottom of the gasification furnace 1, then pass through connection
Pipe nipple 3 connects with slag bucket system 2, cancels the central jet pipe connected with the gas distribution grid area A, can avoid passing through center
Jet pipe is passed through high speed gasifying agent and the gas distribution to gas distribution grid area A has an impact so that gas distribution grid area A stream
Field distribution is uneven, and the situation of gasifying agent bias current occurs, additionally it is possible to and avoid generative center jet pipe from wearing, and by described
Connecting short section 3 sets annular gas distributor 4 close to one end of the scum pipe 13, can pass through the column slagging channel B
Swirling Flow is formed to the gas distribution grid area A gas distributions, and in the gas distribution grid area A, overcomes the column deslagging to lead to
The resistance of the ash bed in gas distribution grid area A above road B, increase the fluidisation of radial zone area, be advantageous to gas distribution
Plate area A gas is dispersed, improves the Flow Field Distribution on scum pipe periphery, can avoid deslagging caused by Flow Field Distribution inequality
Unstable and obstructed deslagging situation occurs, meanwhile, lime-ash can be in Swirling Flow caused by annular gas distributor 4
Effect is lower to be fallen, i.e., described lime-ash can be fallen from periphery to Swirl, can avoid the shape on the annular gas distributor 4
Into bridge formation, unobstructed deslagging is realized.
Wherein, the bottom of the gas distribution grid 11 can be connected by expansion joint 14 with the scum pipe 13.In such manner, it is possible to
Thermal stress caused by absorbing gas distribution grid, avoids gas distribution grid from deforming.
In one embodiment of the invention, the connecting short section 3 is by inner cylinder 31 and is centered around the outer of the outside of inner cylinder 31
The vapor chuck that set 32 is formed.
In embodiments of the present invention, by the way that the connecting short section 3 to be arranged to the form of vapor chuck, and by institute
State in vapor chuck and be passed through vapor, indirect heat exchange can occur with the lime-ash to be fallen by the connecting short section 3, for example,
When bed drain purge is smaller, and the ash temperature to be fallen by the connecting short section 3 is relatively low, can be passed through into the vapor chuck
The higher overheated steam of temperature (300-400 DEG C), the overheated steam can be with the ashes by the connecting short section 3 whereabouts
Slag transmits heat by the inner cylinder 31 of the connecting short section 3, so as to realize adding to the lime-ash by the connecting short section 3 whereabouts
Heat；, can be to the vapor chuck when bed drain purge is larger, and the temperature of the lime-ash to be fallen by the connecting short section 3 is higher
Inside it is passed through the relatively low overheated steam of temperature (as being higher than 5-10 DEG C of saturation temperature) so that the relatively low overheated steam of temperature passes through
The inner cylinder of the connecting short section 3 carries out heat exchange with the lime-ash to be fallen by the connecting short section 3, to passing through the connecting short section
The 3 lime-ash coolings fallen, the temperature of the lime-ash so as to make to fall by the connecting short section 3 are maintained at 300-500 DEG C, this
Sample one, lime-ash condenses phenomenon caused by can avoiding the water vapor condensation in the lime-ash by the connecting short section 3 whereabouts,
So as to realize unobstructed deslagging.
Wherein, the vapor can be passed through through the bottom of the vapor chuck, and top discharge, so, water steams
The lime-ash counter current contacting that gas can fall with passing through the connecting short section 3, so as to improve heat transfer effect.
In another embodiment of the present invention, referring to Fig. 3, Fig. 4 and Fig. 5, the inner cylinder 31 is uniformly recessed towards the overcoat 32
Falling into has the tubular structures 5 of multiple grooves 51, the tubular structure 5 by towards the groove 51 that the overcoat 32 is uniformly recessed with it is described
Overcoat 32 is connected, and the vapor chuck is divided into multiple interconnected steam chamber.
In embodiments of the present invention, because the inner cylinder 31 is uniformly to be recessed to have the cylinder of multiple grooves 51 towards the overcoat 32
Shape structure 5, and the tubular structure 5 is towards the groove 51 that the overcoat 32 is uniformly recessed with the overcoat 32 by being connected, can
The vapor chuck is divided into multiple interconnected steam chamber, therefore, water steaming is flowed through in the vapor chuck
During gas, cell of the vapor through projection flows in chuck, can avoid short-circuit formation, strengthens indirect with chuck inner cylinder lime-ash
Heat exchange, meanwhile, raised small indoor vapor runs into enclosed region caused by groove 51 in flow process to collide, shape
Into vortex, enhanced heat exchange effect.
Further, the inner cylinder 31 towards the groove 51 that the overcoat 32 is uniformly recessed with the overcoat 32 by being connected
When, the periphery of the groove 51 is directed away from the direction projection (as shown in Fig. 5 dotted lines) of the overcoat 32, therefore, in the ash
When slag falls under cyclonic action, the lime-ash reunited together can be thrown toward the inwall of the connecting short section 3 under cyclonic action
Occur to crush in projection, lime-ash can be avoided to lump and hold susceptible to plugging situation and occur, realize smooth deslagging.
Wherein, it is preferred that the groove 51 is circular groove.
Wherein, can be connected towards the groove 51 that the overcoat 32 is uniformly recessed and the overcoat 32 by way of laser welding
Connect.
Further, two adjacent row grooves 51 with alignment (as shown in Figure 3) or can be staggered (such as Fig. 4 institutes
Show).
Wherein, the concrete structure of the annular gas distributor 4 is not limited, as long as can be in the gas distribution grid
Area A forms Swirling Flow.
In one embodiment of the invention, referring to Fig. 6, the annular gas distributor 4 is gas distribution endless tube, the gas distribution endless tube
The one side set upward is disposed with least three circle qi-emitting holes 41 in the form of concentric circles, and the qi-emitting hole 41 is with diameter from outmost turns
Trend to the descending change of innermost circle is uniformly distributed, wherein, the gas distribution direction of the qi-emitting hole 41 and concentric circles where it
Angle between the vertical section at place gradually increases from outmost turns to innermost circle, and the angle between horizontal plane is from outmost turns to most
Inner ring is gradually reduced.
In embodiments of the present invention, different bore sizes and gas distribution angle are set by ecto-entad, with to described
The gas abundance and spray angle of gas distribution endless tube diverse location are controlled, and can form a dispersed eddy flow of air-flow
The cloth tolerance in flow field, i.e. outmost turns is maximum, and the cloth tolerance of several circles of middle transition is smaller, and the cloth tolerance of innermost circle is minimum, and more to
Inner side, triangular angular is bigger, and the elevation angle is smaller, can overcome the resistance of ash bed from outside to inside, increases the stream of radial zone area
Change so that the descending change of air-flow that the lime-ash of the gas distribution grid area A is subject to from periphery to center, it is equal to be advantageous to gas
It is even scattered, bias current is avoided, and then the Flow Field Distribution on scum pipe periphery can be improved, and be advantageous to unobstructed stable deslagging.
Preferably, referring to Fig. 6 and Fig. 7, a diameter of 3-4mm of outmost turns qi-emitting hole 41, gas distribution direction is straight up；
From outside to inside at least one circle qi-emitting hole 41 a diameter of 2-3mm, gas distribution direction with its place concentric circles at it is vertical
Angle theta 1 between section is 15-30 degree, and the angle theta 2 between horizontal plane is 45-80 degree；
From inside to outside at least one circle qi-emitting hole 41 a diameter of 1-2mm, gas distribution direction with its place concentric circles at it is vertical
Angle theta 1 between section is 30-50 degree, and the angle theta 2 between horizontal plane is 30-50 degree.
In another embodiment of the present invention, referring to Fig. 8, the bottom of the connecting short section 3 is additionally provided with least two eddy flows
Shower nozzle 6, the swirl flow nozzle 6 are used to spray into water into the connecting short section 3 in a manner of eddy flow so that lime-ash can be in the band of water
The dynamic lower inwall with the connecting short section 3 collides.
So, in lime-ash dropping process, spraying into water, energy in a manner of eddy flow into the connecting short section 3
It is enough to force lime-ash to be moved into the connecting short section 3 under the percussion of water, and touched with the inwall of the connecting short section 3
Hit, strengthen the lime-ash and exchanged heat with steam jacket, simultaneously, additionally it is possible to force lime-ash to be mixed with water, avoid thinner grey solid impurity particle
Reunite in pulp water, so as to overcome one layer of fine slag of floating on water in slag bucket system so that mobility is deteriorated, long-time is accumulated
The problem of causing dreg removing system easily to block.
Wherein, the swirl flow nozzle 6 being arranged circumferentially along the connecting short section 3.
In order to further improve eddy flow effect, it is preferred that the injection direction of each swirl flow nozzle 6 for obliquely,
And the angle theta 3 between the vertical section of the corresponding opening position of connecting short section 3 is 20-45 degree.
Further, the angle theta 4 between the injection direction and horizontal plane of the swirl flow nozzle 6 is more than 0 degree and is less than or equal to 30
Degree.
In another embodiment of the present invention, referring to Fig. 9, the slag bucket system 2 includes the pulp water being sequentially communicated from top to bottom
Pond 21 and slag lock 22；
The first water supplement port 211 and liquid level gauge 212 are provided with the pulp water pond 21；
The first residual cake valve a is provided with the pipeline connected between the pulp water pond 21 and the slag lock 22；
The bottom of the slag lock 22 is provided with the second residual cake valve b.
In embodiments of the present invention, in coal gasification course, caused lime-ash can fall directly into the pulp water in gasification furnace
In pond 21, the pulp water pond 21 can be filled with water by first water supplement port 211 in advance, can be to falling into the pulp water pond 21
Lime-ash further cooled, in actual applications, the first residual cake valve a can be normally opened, so, can be in the pulp water pond
21 and the slag lock 22 in hold a certain amount of water, lime-ash can be continuously fallen into the slag lock 22 through the pulp water pond 21, when
The liquid level that liquid level gauge 212 on the pulp water pond 21 is shown exceedes setting value, it is necessary to when carrying out deslagging processing, is first shut off described
First residual cake valve a, the second residual cake valve b is opened, the lime-ash in the slag lock 22 is discharged, then, closes the second row
Slag valve b, and water is full of into the slag lock 22, the first residual cake valve a is opened, above step is repeated, constantly by gasification furnace
Caused lime-ash is discharged by the pulp water pond 21 and the slag lock 22.
In the another preferred embodiment of the present invention, the second water supplement port 221 and rinse mouth are additionally provided with the slag lock 22
222.By setting the second water supplement port 221 and rinse mouth 222 in the slag lock 22, the second residual cake valve b is being opened by institute
When stating the lime-ash discharge in slag lock 22, the slag lock 22 can be rinsed by the rinse mouth 222, by the slag lock
Lime-ash emptying in 22, then, can be after the second residual cake valve b be closed, by second water supplement port 221 to the slag
Water is full of in lock 22, discharges lime-ash in order to constantly repeat above step.
Further, it is also provided with relief valve (not shown) in the slag lock 22.By setting relief valve,
Close after the first residual cake valve a, relief valve in the slag lock 22 can be opened by the pressure release of slag lock 22 to relatively low
Pressure, so as to improve the security of deslagging when opening the second residual cake valve b and discharging lime-ash.
Further, atmospheric valve (not shown) is additionally provided with the slag lock 22, can be with by installation of relief valve
Gas in the slag lock 22 is vented, further improves the security of deslagging.
In another embodiment of the present invention, balance pipe 7 can also be communicated between the pulp water pond 21 and the slag lock 22,
Balanced valve c is provided with the balance pipe 7.By the way that the pulp water pond 21 is connected with the slag lock 22 by balance pipe, and
Balanced valve c is set on the balance pipe, when being again turned on the first residual cake valve a, the lime-ash in the pulp water pond 21 drained into
, can be by opening the pressure between the balanced valve c pulp water ponds 21 and the slag lock 22 before in the slag lock 22
Dynamic balance, pressure difference is formed between the pulp water pond 21 and the slag lock 22, so, opening the first residual cake valve a when institutes
Stating lime-ash can drain into the slag lock 22 under the differential pressure action between the pulp water pond 21 and the slag lock 22.
In a preferred embodiment of the present invention, the bottom of the pulp water pond 21 and the slag lock 22 is inverted cone-shaped structure.
Be advantageous to the discharge of lime-ash, the lime-ash clogging in tapping process can be avoided.
Smoothly discharged for the ease of lime-ash, it is preferred that the cone angle of the inverted cone-shaped structure is 50-90 degree.
It is further preferred that the cone angle of the inverted cone-shaped structure is 60 degree.
In one embodiment of the invention, referring to Figure 10, the dreg removing system also includes water washing tank 8, and the water washing tank 8 is set
Connected in the lower section of the slag lock 22, and with the slag-drip opening of the slag lock 22., can be to constantly draining into by setting water washing tank 8
Lime-ash in the water washing tank 8 is washed, to be reclaimed to the catalyst in the lime-ash.
Wherein, agitator 81 can be provided with the water washing tank 8, stirred entering the pulp water in the water washing tank
Mix.
Preferably, the rotating speed of the agitator 81 can be that 40-100 turns/min.
On the other hand, the embodiment of the present invention provides a kind of Slagoff method, applied to dreg removing system as described above, referring to figure
11, including：
Step 1) coal occurs in gasification furnace gasification reaction generation lime-ash；
Step 2) by the column slagging channel to gas distribution grid area gas distribution, to be formed in the gas distribution grid area
Swirling Flow so that lime-ash falls in the presence of the Swirling Flow, and is discharged the lime-ash by the slag bucket system.
The embodiment of the present invention provides a kind of Slagoff method, by cancelling central jet pipe, can avoid high velocity air to gas
Body distribution has an impact, and can prevent gasifying agent bias current, meanwhile, by the column slagging channel to gas distribution grid area cloth
Gas, to form Swirling Flow in the gas distribution grid area, the resistance of the ash bed on the column slagging channel upper strata can be overcome
Power, increases the fluidisation of radial zone area, and the gas for being advantageous to the gas distribution grid area on the column slagging channel upper strata is uniform
It is scattered, improve the Flow Field Distribution on scum pipe periphery, so as to avoiding deslagging caused by Flow Field Distribution inequality unstable and
The obstructed situation of deslagging occurs, meanwhile, lime-ash can fall in the presence of Swirling Flow caused by annular gas distributor,
I.e. described lime-ash can be fallen from periphery to Swirl, avoided being formed on the annular gas distributor and built bridge, realize unobstructed
Deslagging.
In another embodiment of the present invention, when the connecting short section is by inner cylinder and the overcoat being centered around on the outside of the inner cylinder
During the vapor chuck of composition, methods described also includes：
Vapor is flowed through to the vapor chuck from bottom to top, the lime-ash with being fallen by the connecting short section is changed
Heat.
The lime-ash to be fallen by the connecting short section can be heated or cooled so that pass through the connecting short section
The temperature of the lime-ash of whereabouts is maintained at 300-500 DEG C, so, can avoid in the lime-ash by connecting short section whereabouts
Water vapor condensation caused by lime-ash condense phenomenon, so as to realize unobstructed deslagging.
In another embodiment of the present invention, when the bottom of the connecting short section is additionally provided with least two swirl flow nozzles,
Methods described also includes：
Water is sprayed into the connecting short section by the swirl flow nozzle so that lime-ash under the drive of water with the connection
The inwall of pipe nipple collides.
So, in lime-ash dropping process, under the percussion of water, the lime-ash is interior with the connecting short section
Wall collides, and can strengthen the lime-ash and steam jacket and exchange heat, simultaneously, additionally it is possible to force lime-ash to be mixed with water, avoid compared with
Thin grey solid impurity particle is reunited in pulp water, so as to overcome in slag bucket system one layer of fine slag of floating on water so that mobility becomes
Difference, accumulate the problem of causing dreg removing system easily to block for a long time.
In another embodiment of the present invention, when the slag bucket system includes the pulp water pond being sequentially communicated from top to bottom and slag
Lock；Water supplement port and liquid level gauge are provided with the pulp water pond；Set on the pipeline connected between the pulp water pond and the slag lock
There is the first residual cake valve；When the bottom of the slag lock is provided with the second residual cake valve；
So that lime-ash falls in the presence of the Swirling Flow, and is discharged the lime-ash by the slag bucket system,
Specifically include：
Step 21) keeps first residual cake valve to open, and second residual cake valve is closed, and to the slag lock and the slag
Water is filled with pond；
Step 22) makes the lime-ash be fallen into the presence of Swirling Flow in slag lock and pulp water pond filled with water；
Step 23) closes first residual cake valve when the liquid level gauge shows that liquid level reaches setting value, opens described the
Two residual cake valves, the lime-ash in the slag lock is discharged, then, close second residual cake valve, and water is full of into the slag lock；
Step 24) opens first residual cake valve so that the lime-ash in the pulp water pond is fallen into the slag lock, closes institute
The first residual cake valve is stated, opens second residual cake valve, the lime-ash drained into the slag lock is discharged, and close second deslagging
Valve；
Step 25) constantly repeats above step 21), step 22), step 23) and step 24), until will be produced in gasification furnace
Raw lime-ash discharge.
In embodiments of the present invention, by above step, continuously caused lime-ash in gasification furnace can be discharged.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (18)
- A kind of 1. dreg removing system, it is characterised in that including：Gasification furnace, the bottom of the gasification furnace are provided with gas distribution grid, and the top of the gas distribution grid is gas distribution grid Area, the bottom of the gas distribution grid extend downward with scum pipe, and the scum pipe is arranged in the bottom of the gasification furnace, The column slagging channel connected with the gas distribution grid area is formed in the bottom of the gasification furnace, and passes through connecting short section and slag Struggle against system connectivity；The connecting short section is provided with annular gas distributor close to one end of the scum pipe, and the annular gas distributor is used In by the column slagging channel to gas distribution grid area gas distribution, to form eddy flow stream in the gas distribution grid area So that lime-ash can fall in the presence of Swirling Flow and be discharged by the slag bucket system.
- 2. dreg removing system according to claim 1, it is characterised in thatThe connecting short section is the vapor chuck being made up of inner cylinder and the overcoat being centered around on the outside of the inner cylinder.
- 3. dreg removing system according to claim 2, it is characterised in thatThe inner cylinder is that uniformly depression has the tubular structures of multiple grooves towards the overcoat, and the tubular structure is by towards described outer Cover the groove being uniformly recessed to be connected with the overcoat, the vapor chuck is divided into multiple interconnected steam chamber.
- 4. dreg removing system according to claim 3, it is characterised in thatThe groove is circular groove.
- 5. dreg removing system according to claim 3, it is characterised in thatAdjacent two row groove alignments are staggered.
- 6. dreg removing system according to claim 1, it is characterised in thatThe annular gas distributor is gas distribution endless tube, and the one side that the gas distribution endless tube is set upward is arranged in the form of concentric circles There are at least three circle qi-emitting holes, with diameter, the trend of descending change from outmost turns to innermost circle is uniformly distributed the qi-emitting hole, Wherein, the angle between the gas distribution direction of the qi-emitting hole and vertical section where it at concentric circles is from outmost turns to innermost circle Gradually increase, the angle between horizontal plane are gradually reduced from outmost turns to innermost circle.
- 7. dreg removing system according to claim 6, it is characterised in thatA diameter of 3-4mm of outmost turns qi-emitting hole, gas distribution direction is straight up；A diameter of 2-3mm of at least one circle qi-emitting hole from outside to inside, between the vertical section at gas distribution direction and place concentric circles Angle be 15-30 degree, the angle between horizontal plane is 45-80 degree；A diameter of 1-2mm of at least one circle qi-emitting hole from inside to outside, between the vertical section at gas distribution direction and place concentric circles Angle be 30-50 degree, the angle between horizontal plane is 30-50 degree.
- 8. dreg removing system according to claim 1, it is characterised in thatThe bottom of the connecting short section is additionally provided with least two swirl flow nozzles, the swirl flow nozzle be used in a manner of eddy flow to Water is sprayed into the connecting short section so that the inwall that lime-ash can be with the connecting short section under the drive of water collides.
- 9. dreg removing system according to claim 8, it is characterised in thatThe swirl flow nozzle is arranged circumferentially along the connecting short section.
- 10. dreg removing system according to claim 8, it is characterised in thatThe injection direction of each swirl flow nozzle for obliquely, and with the vertical section of corresponding connecting short section opening position it Between angle be 20-45 degree.
- 11. dreg removing system according to claim 1, it is characterised in thatThe slag bucket system includes pulp water pond and the slag lock being sequentially communicated from top to bottom；Water supplement port and liquid level gauge are provided with the pulp water pond；The first residual cake valve is provided with the pipeline connected between the pulp water pond and the slag lock；The bottom of the slag lock is provided with the second residual cake valve.
- 12. dreg removing system according to claim 11, it is characterised in thatThe pulp water pond and the bottom of the slag lock are inverted cone-shaped structure.
- 13. dreg removing system according to claim 12, it is characterised in thatThe cone angle of the inverted cone-shaped structure is 50-90 degree.
- 14. dreg removing system according to claim 11, it is characterised in thatThe dreg removing system also includes water washing tank, and the water washing tank is arranged on the lower section of the slag lock, and with the row of the slag lock Cinder notch connects.
- A kind of 15. Slagoff method, it is characterised in that applied to the dreg removing system as described in claim any one of 1-14, including：Step 1) coal occurs in gasification furnace gasification reaction generation lime-ash；Step 2) gas distribution into the column slagging channel by the annular gas distributor, in the column slagging channel Forming Swirling Flow so that lime-ash falls in the presence of the Swirling Flow, and by the slag bucket system by the lime-ash Discharge.
- 16. Slagoff method according to claim 15, it is characterised in thatWhen the connecting short section is the vapor chuck being made up of inner cylinder and the overcoat being centered around on the outside of the inner cylinder, the side Method also includes：Vapor is flowed through to the vapor chuck from bottom to top, the lime-ash with being fallen by the connecting short section is exchanged heat.
- 17. Slagoff method according to claim 15, it is characterised in thatWhen the bottom of the connecting short section is additionally provided with least two swirl flow nozzles,Methods described also includes：Water into the connecting short section is sprayed into a manner of eddy flow the swirl flow nozzle so that lime-ash under the drive of water with The inwall of the connecting short section collides.
- 18. Slagoff method according to claim 15, it is characterised in thatWhen the slag bucket system includes the pulp water pond being sequentially communicated from top to bottom and slag lock；Water supplement port is provided with the pulp water pond And liquid level gauge；The first residual cake valve is provided with the pipeline connected between the pulp water pond and the slag lock；The bottom of the slag lock When being provided with the second residual cake valve；So that lime-ash falls in the presence of the Swirling Flow, and is discharged the lime-ash by the slag bucket system, specifically Including：Step 21) keeps first residual cake valve to open, and second residual cake valve is closed, and to the slag lock and the pulp water pond In be filled with water；Step 22) makes the lime-ash be fallen into the presence of Swirling Flow in slag lock and pulp water pond filled with water；Step 23) closes first residual cake valve, opens the second row when the liquid level gauge shows that liquid level reaches setting value Slag valve, the lime-ash in the slag lock is discharged, then, close second residual cake valve, and water is full of into the slag lock；Step 24) opens first residual cake valve so that the lime-ash in the pulp water pond is fallen into the slag lock, closes described the One residual cake valve, second residual cake valve is opened, the lime-ash drained into the slag lock is discharged, and close second residual cake valve；Step 25) constantly repeats above step 21), step 22), step 23) and step 24), until caused by will be in gasification furnace Lime-ash is discharged.
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| CN108753360A (en) * | 2018-06-01 | 2018-11-06 | 新奥科技发展有限公司 | A kind of dreg removing system, catalytic coal gasifaction system and catalytic coal gasifaction method |
| CN110820744A (en) * | 2019-11-15 | 2020-02-21 | 甘肃中建市政工程勘察设计研究院有限公司 | Soil suction machine for residual soil in pile hole and residual soil suction method |
| CN111607433A (en) * | 2019-02-25 | 2020-09-01 | 新能能源有限公司 | Cooling and deslagging method for coal ash |
| CN114672345A (en) * | 2020-12-27 | 2022-06-28 | 新疆宜化化工有限公司 | Blowing process and device for preventing coke residue deposition at furnace bottom of circulating fluidized bed coal gasifier |
| CN115821067A (en) * | 2022-11-30 | 2023-03-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for producing vanadium slag by refining vanadium-removing slurry and ore pulp evaporation furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108753360A (en) * | 2018-06-01 | 2018-11-06 | 新奥科技发展有限公司 | A kind of dreg removing system, catalytic coal gasifaction system and catalytic coal gasifaction method |
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| CN111607433B (en) * | 2019-02-25 | 2021-04-30 | 新能能源有限公司 | Cooling and deslagging method for coal ash |
| CN110820744A (en) * | 2019-11-15 | 2020-02-21 | 甘肃中建市政工程勘察设计研究院有限公司 | Soil suction machine for residual soil in pile hole and residual soil suction method |
| CN114672345A (en) * | 2020-12-27 | 2022-06-28 | 新疆宜化化工有限公司 | Blowing process and device for preventing coke residue deposition at furnace bottom of circulating fluidized bed coal gasifier |
| CN115821067A (en) * | 2022-11-30 | 2023-03-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for producing vanadium slag by refining vanadium-removing slurry and ore pulp evaporation furnace |
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