CN107586565B - A kind of dreg removing system and method - Google Patents
A kind of dreg removing system and method Download PDFInfo
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- CN107586565B CN107586565B CN201710808014.XA CN201710808014A CN107586565B CN 107586565 B CN107586565 B CN 107586565B CN 201710808014 A CN201710808014 A CN 201710808014A CN 107586565 B CN107586565 B CN 107586565B
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Abstract
The present invention relates to Coal Gasification Technology field more particularly to a kind of dreg removing system and methods.The Flow Field Distribution that scum pipe periphery can be improved avoids the situation that deslagging is unstable and deslagging is obstructed brought by Flow Field Distribution unevenness from occurring, and the security risks such as abrasion that can be avoided central jet pipe.A kind of dreg removing system, it include: 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 being connected to gas distribution grid area is formed in the bottom of gasification furnace, and pass through connecting short section and slag bucket system connectivity；Annular gas distributor is arranged close to one end of scum pipe in connecting short section, 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, makes lime-ash that can fall under the action of Swirling Flow and pass through slag bucket system to be discharged.
Description
Technical field
The present invention relates to Coal Gasification Technology field more particularly to a kind of dreg removing system and methods.
Background technique
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 under certain pressure and temperature with vapor, hydrogen and carbon monoxide composition is being catalyzed
Gasification reaction is carried out under the catalytic action of agent, generates the methane of high concentration.
Coal catalytic gasification technique carries out usually in fluidized-bed gasification furnace, shown in Figure 1, the bottom of fluidized-bed gasification furnace 1
Portion's setting conical gas distribution grid 11 and central jet pipe 12, the bottom of the conical gas distribution grid 11 extend downward with
Scum pipe 13, the bottom that the scum pipe 13 passes through the gasification furnace 1 are connected to 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 generates
Lime-ash drained into the slag bucket system 2 by the annular space 14 between the scum pipe 13 and the central jet pipe 12, herein
In the process, since the technique of catalytic coal gasification requires, 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, is easy to impact the gas distribution of gas distribution grid and Flow Field Distribution, and be easy to cause high-rise gasification
Agent bias current, gas are unevenly distributed, and influence bed gas-solid distribution, and then can impact to annular space deslagging causes deslagging unstable,
Even not deslagging phenomena such as；On the other hand, annular space deslagging can also be to center jet pipe serious wear, or even causes safety accident.
Summary of the invention
It is a primary object of the present invention to provide a kind of dreg removing system and method, can improve the flow field on scum pipe periphery
Distribution avoids deslagging is unstable and deslagging is obstructed situation brought by Flow Field Distribution unevenness from occurring, and can be avoided
The security risks such as the abrasion of heart jet pipe.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
On the one hand, the embodiment of the present invention provides a kind of dreg removing system, comprising:
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
The column slagging channel being connected to the gas distribution grid area is formed in the bottom of the gasification furnace on bottom, and 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 through 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 under the action of Swirling Flow and is discharged by the slag bucket system.
Optionally, the connecting short section is that the vapor being made of inner cylinder and the housing 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 towards the housing, the tubular structure
It is connect by the groove being uniformly recessed towards the housing with the housing, the vapor collet is divided into multiple be interconnected
Steam chamber.
Optionally, the groove is circular groove.
Optionally, it two adjacent row groove alignments or is staggered.
Optionally, the annular gas distributor is gas distribution endless tube, and the one side that the gas distribution endless tube is arranged upward is with concentric
Round form is disposed at least three circle qi-emitting holes, and with diameter, the descending variation 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 is gradually increased to innermost circle, and the angle between horizontal plane is gradually reduced from outmost turns to innermost circle.
Optionally, the diameter of outmost turns qi-emitting hole is 3-4mm, and gas distribution direction is straight up；
The diameter of at least one circle qi-emitting hole is 2-3mm from outside to inside, the vertical section at gas distribution direction and place concentric circles
Between angle be 15-30 degree, the angle between horizontal plane is 45-80 degree；
The diameter of at least one circle qi-emitting hole is 1-2mm from inside to outside, the vertical section at gas distribution direction and place concentric circles
Between angle be 30-50 degree, the angle between horizontal plane is 30-50 degree.
Optionally, the lower part of the connecting short section is additionally provided at 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 lime-ash can be sent out under the drive of water with the inner wall of the connecting short section
Raw collision.
Optionally, the swirl flow nozzle being arranged circumferentially along the connecting short section.
Optionally, the injection direction of each swirl flow nozzle be obliquely, and at corresponding connecting short section position
Vertical section between angle be 20-45 degree.
Optionally, the slag bucket system includes the pulp water pond being sequentially communicated from top to bottom and slag lock；
Water supplement port and liquidometer are provided on the pulp water pond；
The first residual cake valve is provided on the pipeline being 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 further includes water washing tank, and the water washing tank is arranged in 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, is applied to dreg removing system as described above, comprising:
Coal in gasification furnace gasification reaction and generates lime-ash by step 1) occurs；
Step 2) gas distribution into the column slagging channel by the annular gas distributor is logical in the column deslagging
Swirling Flow is formed in road, so that lime-ash falls under the action of the Swirling Flow, and will be described by the slag bucket system
Lime-ash discharge.
Optionally, when the connecting short section is that the vapor being made of inner cylinder and the housing being centered around on the outside of the inner cylinder presss from both sides
When set, the method also includes:
Vapor is flowed through to the vapor collet from bottom to top, is changed with the lime-ash to fall by the connecting short section
Heat.
Optionally, when the lower part of the connecting short section is additionally provided at least two swirl flow nozzles,
The method also includes:
Water is sprayed into the connecting short section in a manner of eddy flow the swirl flow nozzle, so that drive of the lime-ash in water
The lower inner wall 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 liquidometer；The first residual cake valve is provided on the pipeline being 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 under the action of the Swirling Flow, and the lime-ash is discharged by the slag bucket system,
It specifically includes:
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 in pond；
Step 22) falls into the lime-ash under the action of Swirling Flow in slag lock and pulp water pond filled with water；
Step 23) closes first residual cake valve when the liquidometer shows that liquid level reaches setting value, opens described the
Lime-ash in the slag lock is discharged two residual cake valves, then, closes 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, second residual cake valve is opened, 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 will be generated in gasification furnace
Lime-ash discharge.
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 the gasification furnace
Bottom, and the column slagging channel being connected to 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 being connected to the gas distribution grid area, can be avoided and penetrated by center
Flow tube is passed through high speed gasifying agent and has an impact to the distribution of the gas in gas distribution grid area, so that the flow field in gas distribution grid area point
The case where cloth unevenness and gasifying agent bias current, occurs, additionally it is possible to generative center jet stream pipe abrasion is avoided, and by the connection
Annular gas distributor is arranged close to one end of the scum pipe in pipe nipple, 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 conducive to gas distribution grid area is uniform
Dispersion, improve scum pipe periphery Flow Field Distribution, so as to avoid Flow Field Distribution unevenness brought by deslagging it is unstable and
The obstructed situation of deslagging occurs, meanwhile, lime-ash can fall under the action of the Swirling Flow caused by annular gas distributor,
The i.e. described lime-ash can be fallen from periphery to Swirl, avoided being formed on the annular gas distributor and be built bridge, realize unobstructed
Deslagging.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram for dreg removing system that the prior art provides；
Fig. 2 is a kind of structural schematic diagram of dreg removing system provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram that a kind of connecting short section provided in an embodiment of the present invention expands into plane；
Fig. 4 is the structural schematic diagram that another connecting short section provided in an embodiment of the present invention expands into plane；
Fig. 5 is the structural schematic diagram provided in an embodiment of the present invention based on Fig. 4 in the direction AA '；
Fig. 6 is a kind of structural schematic diagram of annular gas distributor provided in an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of another annular gas distributor provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of another dreg removing system provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of another dreg removing system provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of another dreg removing system provided in an embodiment of the present invention；
Figure 11 is a kind of flow diagram 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, column
Shape slagging channel-B；Slag bucket system -2；Connecting short section -3；Annular gas distributor -4；Expansion joint -14；Inner cylinder -31；Housing-
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；
Liquidometer -212；First residual cake valve-a；Second water supplement port -221；Rinse mouth -222；Balance pipe -7, balanced valve-c；Water washing tank -8；
Blender -81.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In
In description of the invention, unless otherwise indicated, the meaning of " plurality " is two or more.
On the one hand, the embodiment of the present invention provides a kind of dreg removing system, referring to fig. 2, comprising:
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 forms the column deslagging being connected to the gas distribution grid area A in the bottom of the gasification furnace 1 and leads to
Road B, and be connected to 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 through the column slagging channel B to the gas distribution grid area A gas distribution, in the gas distribution grid area A
Swirling Flow is formed, so that lime-ash can fall under the action 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 being connected to the gas distribution grid area A is formed in the bottom of the gasification furnace 1, then pass through connection
Pipe nipple 3 is connected to slag bucket system 2, is cancelled the central jet pipe being connected to the gas distribution grid area A, be can be avoided and pass through center
Jet pipe is passed through high speed gasifying agent and has an impact to the distribution of the gas of gas distribution grid area A, so that the stream of gas distribution grid area A
The case where field distribution unevenness and gasifying agent bias current, occurs, additionally it is possible to generative center jet stream pipe abrasion is avoided, and by described
Annular gas distributor 4 is arranged close to one end of the scum pipe 13 in connecting short section 3, can pass through the column slagging channel B
Swirling Flow is formed to the gas distribution grid area A gas distribution, and in the gas distribution grid area A, overcomes the column deslagging logical
The resistance of the ash bed in gas distribution grid area A above road B increases the fluidisation of radial zone area, is conducive to gas distribution
The gas of plate area A is evenly dispersed, improves the Flow Field Distribution on scum pipe periphery, can be avoided deslagging brought by Flow Field Distribution unevenness
Unstable and obstructed deslagging situation occurs, meanwhile, lime-ash can the Swirling Flow caused by annular gas distributor 4
Effect is lower to fall, i.e., the described lime-ash can be fallen from periphery to Swirl, can be avoided the shape on the annular gas distributor 4
At bridge formation, unobstructed deslagging is realized.
Wherein, the bottom of the gas distribution grid 11 can be connect by expansion joint 14 with the scum pipe 13.In such manner, it is possible to
The thermal stress that gas distribution grid generates is absorbed, gas distribution grid is avoided to deform.
In one embodiment of the invention, the connecting short section 3 is by inner cylinder 31 and to be centered around the outer of 31 outside of inner cylinder
The vapor collet that set 32 is constituted.
In embodiments of the present invention, by way of the connecting short section 3 is arranged to vapor collet, and by institute
It states in vapor collet and is passed through vapor, indirect heat exchange can occur with the lime-ash to fall by the connecting short section 3, for example,
When bed drain purge is smaller, when the ash temperature to fall by the connecting short section 3 is lower, can be passed through into the vapor collet
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
The inner cylinder 31 that slag passes through the connecting short section 3 transmits heat, to realize adding to the lime-ash to fall by the connecting short section 3
Heat；It, can be to the vapor collet when temperature of the lime-ash to fall by the connecting short section 3 is higher when bed drain purge is larger
It is inside passed through the lower overheated steam of temperature (as being higher than 5-10 DEG C of saturation temperature), so that the lower overheated steam of temperature passes through
The inner cylinder of the connecting short section 3 and the lime-ash progress heat exchange fallen by the connecting short section 3, to by the connecting short section
The 3 lime-ash coolings fallen, so as to make the temperature of the lime-ash to fall by the connecting short section 3 be maintained at 300-500 DEG C, this
Sample one can be avoided lime-ash condensation phenomenon caused by the vapor condensation in the lime-ash to fall by the connecting short section 3,
So as to realize unobstructed deslagging.
Wherein, the vapor can be passed through through the bottom of the vapor collet, and top discharge, so, water steams
The lime-ash counter current contacting that gas can fall with the process 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 housing 32
Falling into has the tubular structures 5 of multiple grooves 51, the tubular structure 5 by the groove 51 that is uniformly recessed towards the housing 32 with it is described
Housing 32 connects, and the vapor collet is divided into multiple interconnected steam chamber.
In embodiments of the present invention, since the inner cylinder 31 is uniformly to be recessed to have the cylinder of multiple grooves 51 towards the housing 32
Shape structure 5, and the tubular structure 5 is connect by the groove 51 being uniformly recessed towards the housing 32 with the housing 32, it can
The vapor collet is divided into multiple interconnected steam chamber, therefore, water steaming is flowed through in the vapor collet
When gas, vapor flows in collet through the cell of protrusion, can be avoided short-circuit formation, strengthens indirect with collet inner cylinder lime-ash
Heat exchange, meanwhile, the small indoor vapor of protrusion encounters enclosed region caused by groove 51 in flow process to collide, shape
At vortex, enhanced heat transfer effect.
Further, the inner cylinder 31 is connect by the groove 51 being uniformly recessed towards the housing 32 with the housing 32
When, the direction that the periphery of the groove 51 is directed away from the housing 32 is raised (as shown in Fig. 5 dotted line), therefore, in the ash
When slag falls under cyclonic action, the lime-ash reunited together can be thrown toward the inner wall of the connecting short section 3 under cyclonic action
Occur to be crushed in protrusion, can be avoided lime-ash agglomeration and be easy the case where blocking, realize smooth deslagging.
Wherein, it is preferred that the groove 51 is circular groove.
Wherein, can be connected by way of laser welding towards the groove 51 that the housing 32 is uniformly recessed with the housing 32
It connects.
Further, two adjacent row grooves 51 with alignment (as shown in Figure 3) or can be staggered (such as Fig. 4 institute
Show).
It wherein, without limitation to the specific structure of the annular gas distributor 4, 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 being arranged upward is disposed at 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 variation 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 is gradually increased 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 size and gas distribution angle are set by ecto-entad, to described
The gas abundance and spray angle of gas distribution endless tube different location are controlled, and the evenly dispersed eddy flow of air-flow is capable of forming
Flow field, i.e. the cloth tolerance of outmost turns are 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
Inside, 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 variation 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 conducive to gas
Even dispersion avoids bias current, and then can improve the Flow Field Distribution on scum pipe periphery, and is conducive to unobstructed stable deslagging.
Preferably, referring to Fig. 6 and Fig. 7, the diameter of outmost turns qi-emitting hole 41 is 3-4mm, and gas distribution direction is straight up；
From outside to inside at least one circle qi-emitting hole 41 diameter be 2-3mm, gas distribution direction and 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 diameter be 1-2mm, gas distribution direction and 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 lower part of the connecting short section 3 is additionally provided at least two eddy flows
Spray head 6, the swirl flow nozzle 6 is for spraying 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 inner wall 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 that lime-ash is forced to move under the percussion of water into the connecting short section 3, and touched with the inner wall of the connecting short section 3
It hits, strengthens the lime-ash and steam jacket exchanges heat, simultaneously, additionally it is possible to force lime-ash to mix 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 that mobility is made to be deteriorated, accumulates for a long time
The problem of causing dreg removing system to be easy blocking.
Wherein, the swirl flow nozzle 6 being arranged circumferentially along the connecting short section 3.
In order to further increase eddy flow effect, it is preferred that the injection direction of each swirl flow nozzle 6 be obliquely,
And the angle theta 3 between the vertical section at corresponding 3 position of connecting short section is 20-45 degree.
Further, the angle theta 4 between the injection direction and horizontal plane of the swirl flow nozzle 6 is greater 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 liquidometer 212 are provided on the pulp water pond 21；
The first residual cake valve a is provided on the pipeline being 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, the lime-ash generated in gasification furnace can fall directly into the pulp water
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 down, in practical applications, the first residual cake valve a can be normally opened, in this way, can be in the pulp water pond
21 and the slag lock 22 in hold a certain amount of water, lime-ash can continuously be fallen into the slag lock 22 through the pulp water pond 21, when
The liquid level that liquidometer 212 on the pulp water pond 21 is shown is more than setting value, when needing to carry out deslagging processing, is first shut off described
First residual cake valve a opens the second residual cake valve b, and 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, it constantly will be in gasification furnace
The lime-ash of generation is discharged by the pulp water pond 21 and the slag lock 22.
In another preferred embodiment of the invention, the second water supplement port 221 and rinse mouth are additionally provided in the slag lock 22
222.By the way that the second water supplement port 221 and rinse mouth 222 are arranged 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 in 22 empties, then, can be after closing the second residual cake valve b, by second water supplement port 221 to the slag
It is full of water in lock 22, lime-ash is discharged in order to constantly repeat above step.
Further, relief valve (not shown) is also provided in the slag lock 22.By the way that relief valve, In is arranged
It closes after the first residual cake valve a, relief valve in the slag lock 22 can be opened by 22 pressure release of slag lock to lower
Pressure, so as to improve the safety of deslagging when opening the second residual cake valve b and lime-ash being discharged.
Further, it is additionally provided with blow valve (not shown) in the slag lock 22, it, can be with by installation of relief valve
Gas in the slag lock 22 is vented, the safety of deslagging is further increased.
In another embodiment of the present invention, it can also be communicated with balance pipe 7 between the pulp water pond 21 and the slag lock 22,
Balanced valve c is provided on the balance pipe 7.By the way that the pulp water pond 21 is connected to the slag lock 22 by balance pipe, and
Balanced valve c is arranged on the balance pipe to drain into the lime-ash in the pulp water pond 21 when being again turned on the first residual cake valve a
Before in the slag lock 22, the pressure between the pulp water pond 21 and the slag lock 22 can be made by opening the balanced valve c
Dynamic balance forms pressure difference between the pulp water pond 21 and the slag lock 22, in this way, opening the first residual cake valve a when institute
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.
The discharge for being conducive to lime-ash can be avoided the lime-ash clogging in tapping process.
It is 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 further includes water washing tank 8, and the water washing tank 8 is arranged
It is connected in the lower section of the slag lock 22, and with the slag-drip opening of the slag lock 22.It, can be to constantly draining by the way that water washing tank 8 is arranged
Lime-ash in the water washing tank 8 is washed, to recycle to the catalyst in the lime-ash.
Wherein, blender 81 can be set in the water washing tank 8, the pulp water entered in the water washing tank has been stirred
It mixes.
Preferably, the revolving speed of the blender 81 can turn/min for 40-100.
On the other hand, the embodiment of the present invention provides a kind of Slagoff method, is applied to dreg removing system as described above, referring to figure
11, comprising:
Coal in gasification furnace gasification reaction and generates lime-ash by step 1) occurs；
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 under the action of the Swirling Flow, and the lime-ash is discharged by the slag bucket system.
The embodiment of the present invention provides a kind of Slagoff method, by cancelling central jet pipe, can be avoided high-speed flow 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 can overcome the resistance of the ash bed on column slagging channel upper layer to form Swirling Flow in the gas distribution grid area
Power, increases the fluidisation of radial zone area, and the gas for being conducive to the gas distribution grid area on column slagging channel upper layer is uniform
Dispersion, improve scum pipe periphery Flow Field Distribution, so as to avoid Flow Field Distribution unevenness brought by deslagging it is unstable and
The obstructed situation of deslagging occurs, meanwhile, lime-ash can fall under the action of the Swirling Flow caused by annular gas distributor,
The i.e. described lime-ash can be fallen from periphery to Swirl, avoided being formed on the annular gas distributor and be built bridge, realize unobstructed
Deslagging.
In another embodiment of the present invention, when the connecting short section is by inner cylinder and the housing being centered around on the outside of the inner cylinder
When the vapor collet of composition, the method also includes:
Vapor is flowed through to the vapor collet from bottom to top, is changed with the lime-ash to fall by the connecting short section
Heat.
The lime-ash to fall by the connecting short section can be heated or be cooled down, so that by the connecting short section
The temperature of the lime-ash of whereabouts is maintained at 300-500 DEG C, so, can be avoided in the lime-ash to fall by the connecting short section
Vapor condensation caused by lime-ash condense phenomenon, so as to realize unobstructed deslagging.
In another embodiment of the present invention, when the lower part of the connecting short section is additionally provided at least two swirl flow nozzles,
The method also includes:
Spray into water into the connecting short section by the swirl flow nozzle so that lime-ash under the drive of water with the connection
The inner wall 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 mix with water, avoid compared with
Thin grey solid impurity particle is reunited in pulp water, so as to overcome one layer of fine slag of floating on water in slag bucket system to become mobility
Difference accumulates the problem of causing dreg removing system to be easy blocking 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 liquidometer are provided on the pulp water pond；It is arranged on the pipeline being 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 under the action of the Swirling Flow, and the lime-ash is discharged by the slag bucket system,
It specifically includes:
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 in pond；
Step 22) falls into the lime-ash under the action of Swirling Flow in slag lock and pulp water pond filled with water；
Step 23) closes first residual cake valve when the liquidometer shows that liquid level reaches setting value, opens described the
Lime-ash in the slag lock is discharged two residual cake valves, then, closes 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, second residual cake valve is opened, 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 the lime-ash generated in gasification furnace can be discharged.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is 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 (15)
1. a kind of dreg removing system characterized by comprising
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 being connected to 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 under the action of Swirling Flow and is discharged by the slag bucket system；
The connecting short section is the vapor collet being made of inner cylinder and the housing being centered around on the outside of the inner cylinder；
The annular gas distributor is gas distribution endless tube, and the one side that the gas distribution endless tube is arranged upward is arranged in the form of concentric circles
There are at least three circle qi-emitting holes, with diameter, the trend of descending variation 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
It is gradually increased, the angle between horizontal plane is gradually reduced from outmost turns to innermost circle.
2. dreg removing system according to claim 1, which is characterized in that
The inner cylinder is uniformly be recessed towards the housing and have the tubular structure of multiple grooves, the tubular structure by towards it is described outside
It covers the groove being uniformly recessed to connect with the housing, the vapor collet is divided into multiple interconnected steam chamber.
3. dreg removing system according to claim 2, which is characterized in that
The groove is circular groove.
4. dreg removing system according to claim 2, which is characterized in that
Two adjacent row groove alignments are staggered.
5. dreg removing system according to claim 1, which is characterized in that
The diameter of outmost turns qi-emitting hole is 3-4mm, and gas distribution direction is straight up；
From outside to inside at least one the diameter of qi-emitting hole is enclosed for 2-3mm, 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；
From inside to outside at least one the diameter of qi-emitting hole is enclosed for 1-2mm, 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.
6. dreg removing system according to claim 1, which is characterized in that
The lower part of the connecting short section is additionally provided at 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 lime-ash can the inner wall under the drive of water with the connecting short section collide.
7. dreg removing system according to claim 6, which is characterized in that
The swirl flow nozzle is arranged circumferentially along the connecting short section.
8. dreg removing system according to claim 6, which is characterized in that
The injection direction of each swirl flow nozzle be obliquely, and with the vertical section at corresponding connecting short section position it
Between angle be 20-45 degree.
9. dreg removing system according to claim 1, which is characterized in that
The slag bucket system includes the pulp water pond being sequentially communicated from top to bottom and slag lock；
Water supplement port and liquidometer are provided on the pulp water pond；
The first residual cake valve is provided on the pipeline being connected between the pulp water pond and the slag lock；
The bottom of the slag lock is provided with the second residual cake valve.
10. dreg removing system according to claim 9, which is characterized in that
The pulp water pond and the bottom of the slag lock are inverted cone-shaped structure.
11. dreg removing system according to claim 10, which is characterized in that
The cone angle of the inverted cone-shaped structure is 50-90 degree.
12. dreg removing system according to claim 9, which is characterized in that
The dreg removing system further includes water washing tank, and the lower section of the slag lock, and the row with the slag lock is arranged in the water washing tank
Cinder notch connection.
13. a kind of Slagoff method, which is characterized in that be applied to such as the described in any item dreg removing systems of claim 1-12, comprising:
Coal in gasification furnace gasification reaction and generates lime-ash by step 1) occurs；
Step 2) gas distribution into the column slagging channel by the annular gas distributor, in the column slagging channel
Swirling Flow is formed, so that lime-ash falls under the action of the Swirling Flow, and by the slag bucket system by the lime-ash
Discharge；
When the connecting short section is the vapor collet being made of inner cylinder and the housing being centered around on the outside of the inner cylinder, the side
Method further include:
Vapor is flowed through to the vapor collet from bottom to top, is exchanged heat with the lime-ash to fall by the connecting short section.
14. Slagoff method according to claim 13, which is characterized in that
When the lower part of the connecting short section is additionally provided at least two swirl flow nozzles,
The method also includes:
Spray into water into the connecting short section in a manner of eddy flow the swirl flow nozzle so that lime-ash under the drive of water with
The inner wall of the connecting short section collides.
15. Slagoff method according to claim 13, which is characterized in that
When the slag bucket system includes the pulp water pond being sequentially communicated from top to bottom and slag lock；Water supplement port is provided on the pulp water pond
And liquidometer；The first residual cake valve is provided on the pipeline being 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 under the action of the Swirling Flow, and the lime-ash is discharged 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 pulp water pond
In be filled with water；
Step 22) falls into the lime-ash under the action 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 liquidometer shows that liquid level reaches setting value
Lime-ash in the slag lock is discharged slag valve, then, closes 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 opens second residual cake valve, 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 will be generated in gasification furnace
Lime-ash discharge.
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| CN108753360B (en) * | 2018-06-01 | 2020-08-28 | 新奥科技发展有限公司 | Slag discharging system, coal catalytic gasification system and coal catalytic gasification method |
| 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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| EP0175819A1 (en) * | 1982-12-13 | 1986-04-02 | Texaco Development Corporation | Apparatus for gasifying coal including a slag trap |
| CN102071067A (en) * | 2010-11-25 | 2011-05-25 | 中国科学院山西煤炭化学研究所 | Carbonaceous organic material pressurized-gasification solid wet deslagging device and method |
| CN104449870A (en) * | 2014-11-04 | 2015-03-25 | 上海锅炉厂有限公司 | Ash agglomeration gasification reaction device |
| CN106833749A (en) * | 2017-03-28 | 2017-06-13 | 上海卓旋化工科技有限公司 | Fluidized-bed coal gasification furnace gas distributor |
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| EP0175819A1 (en) * | 1982-12-13 | 1986-04-02 | Texaco Development Corporation | Apparatus for gasifying coal including a slag trap |
| CN102071067A (en) * | 2010-11-25 | 2011-05-25 | 中国科学院山西煤炭化学研究所 | Carbonaceous organic material pressurized-gasification solid wet deslagging device and method |
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| CN106833749A (en) * | 2017-03-28 | 2017-06-13 | 上海卓旋化工科技有限公司 | Fluidized-bed coal gasification furnace gas distributor |
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