CN115970873A - Device and method for sorting carbon residue in gasified slag - Google Patents
Device and method for sorting carbon residue in gasified slag Download PDFInfo
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- CN115970873A CN115970873A CN202310105936.XA CN202310105936A CN115970873A CN 115970873 A CN115970873 A CN 115970873A CN 202310105936 A CN202310105936 A CN 202310105936A CN 115970873 A CN115970873 A CN 115970873A
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Abstract
The invention provides a device and a method for separating carbon residue in gasified slag. The device comprises: the shell is provided with an accommodating cavity and is provided with a liquid inlet, a concentrate outlet and a tailing outlet which are communicated with the accommodating cavity; the feeding pipe is erected in the accommodating cavity and is provided with a feeding pump; the overflow groove is sleeved with the shell at one end of the concentrate outlet and is provided with a discharge outlet; the tailing discharge pipe is communicated with the tailing outlet and is provided with a discharge valve; a water flow rising distribution plate, wherein the first end of the water flow rising distribution plate is connected with the inner wall of the shell, the second end of the water flow rising distribution plate is connected with one end of the tailing discharge pipe inserted into the accommodating cavity, the water flow rising distribution plate covers the cross section between the inner wall of the shell and the tailing discharge pipe, a plurality of through holes are formed in the water flow rising distribution plate, and the liquid inlet is formed in one side, facing the tailing outlet, of the water flow rising distribution plate; the liquid inlet pipe is communicated with the liquid inlet; the ultrasonic generator is arranged in the accommodating cavity. By adopting the invention, the density difference is strengthened by the ultrasonic generator, and the separation precision and the separation efficiency of the carbon ash in the coal gasification slag are improved.
Description
Technical Field
The invention relates to the technical field of coal gasification slag comprehensive treatment, in particular to a device and a method for separating carbon residue in coal gasification slag.
Background
The energy of China mainly depends on coal, the coal provides sufficient electric power and chemical raw materials for the economic development of China and simultaneously generates a large amount of ash slag, and the content of carbon residue in the gasified coal slag is 10-50%. The existing large-scale utilization approaches of the coal ash slag are mainly used for producing building material products such as cement, concrete, bricks and the like, but the coal ash slag requires that the content of carbon residue in the ash slag is not higher than 10 percent, and the gasified slag cannot be directly used as a raw material for producing the products because of high carbon residue. Moreover, the carbon in the gasified slag still has considerable utilization value as a combustible material after high-temperature treatment, so that the carbon extraction and the mass-separation utilization of the gasified slag are very necessary.
In the prior art, the method for separating the carbon and the ash in the gasified slag mainly comprises a flotation method and a gravity separation method. The flotation method is used for separating carbon residue and ash particles by enhancing the hydrophilicity and hydrophobicity of the particle surfaces, and the improved flotation method has a good separation effect under laboratory conditions, but the medicament consumption is large, and the large-scale application is difficult. The gravity separation method utilizes the density difference among particles to complete separation under the action of a gravity field, usually adopts a water medium cyclone or a spiral separator and other devices, and the device can complete carbon extraction under the condition of adopting water as a separation medium, but the viscous resistance of a single gravity field to different-size particles is weak, and the sufficient displacement difference is difficult to generate between carbon and ash, so that the separation effect is very poor.
Disclosure of Invention
In view of the above, the present invention provides a device and a method for separating carbon residue from gasified slag. The ore pulp is poured into the casing by upper portion inlet pipe in, rivers rise the distributing plate and get into in the casing through lower part feed liquor pipe and rivers, when rising rivers and descending ore pulp interact, the ultrasonic generator in the casing sends the ultrasonic wave, strengthens the density difference, realizes the high-efficient separation of charcoal ash in the coal gasification sediment to overcome prior art's defect.
The device for separating carbon residue in gasified slag provided by the invention comprises:
the device comprises a shell, wherein an accommodating cavity is formed in the shell, and a liquid inlet, a concentrate outlet and a tailing outlet which are communicated with the accommodating cavity are formed in the shell;
the feeding pipe is erected in the accommodating cavity and is provided with a feeding pump;
the overflow groove is sleeved on the shell at one end of the concentrate outlet and provided with a discharge opening;
the tailing discharge pipe is communicated with the tailing outlet and is provided with a discharge valve;
the first end of the water flow ascending distribution plate is connected with the inner wall of the shell, the second end of the water flow ascending distribution plate is connected with one end, inserted into the accommodating cavity, of the tailing discharge pipe, the second end of the water flow ascending distribution plate covers the cross section between the inner wall of the shell and the tailing discharge pipe, a plurality of through holes are formed in the water flow ascending distribution plate, and the liquid inlet is formed in one side, facing the tailing outlet, of the water flow ascending distribution plate;
the liquid inlet pipe is communicated with the liquid inlet;
an ultrasonic generator disposed within the accommodation chamber.
Optionally, the device for separating carbon residue in gasified slag further comprises: the stirring assembly is erected in the accommodating cavity.
Optionally, the stirring assembly comprises: the motor is erected in the accommodating cavity; the transmission shaft is in driving connection with the motor; and the stirring blade is fixedly connected with the transmission shaft.
Optionally, the device for separating carbon residue in gasified slag further comprises: the interference component is arranged on one side, back to the tailing outlet, of the water flow ascending distribution plate and connected with the inner wall of the accommodating cavity, and is used for preventing channeling or eddy current from occurring in the shell.
Optionally, the interference component comprises: many disturb the post, many disturb the post with hold the inner wall interval connection in chamber.
Optionally, the device for sorting carbon residue in gasified slag further comprises: the densimeter is arranged in the accommodating cavity; a controller, an input of the controller being communicatively connected to an output of the densitometer, an output of the controller being communicatively connected to a control of the drain valve.
Optionally, the device for sorting carbon residue in gasified slag further comprises: the pressure gauge, the pressure gauge set up in hold the intracavity, the output of pressure gauge with the input communication connection of controller.
Optionally, the device for separating carbon residue in gasified slag further comprises: the fine material delivery pipe, the fine material delivery pipe with the outer wall connection of casing, and communicate the bin outlet.
The invention also provides a method for separating carbon residue in gasified slag, and the device for separating carbon residue in gasified slag based on any one of the methods comprises the following steps:
adding water into the gasified slag to prepare ore pulp with a set concentration;
carrying out wet screening and grading on the ore pulp, directly collecting particles with the particle size smaller than a set particle size after filter pressing, and screening the particles with the particle size larger than or equal to the set particle size into ore pulp with different particle sizes;
respectively injecting ore pulp of different grain sizes into a shell of the device for separating carbon residue in gasified slag, respectively separating, discharging upper floating slag from a discharge port of an overflow groove, and discharging lower deposited slag from a tailing discharge pipe;
and carrying out filter pressing on the floating slag to obtain a concentrate, and carrying out filter pressing on the sinking slag to obtain a tailing.
Optionally, the filter liquor obtained after filter pressing of the upper scum and the lower scum is filtered and then recycled as circulating water.
Compared with the prior art, the technical scheme provided by the invention at least has the following beneficial effects:
by adopting the device and the method for separating carbon residue in gasified slag, the ore pulp is injected into the shell through the upper feeding pipe, water flow enters the shell through the lower liquid inlet pipe and the water flow ascending distribution plate, the ultrasonic generator in the shell emits ultrasonic waves while the ascending water flow and the descending ore pulp interact, the density difference is strengthened by the ultrasonic waves, and the separation precision and the separation efficiency of carbon ash in the gasified slag are improved.
Drawings
FIG. 1 is a schematic view of an apparatus for sorting carbon residue in gasified slag according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for sorting carbon residue in gasified slag according to an embodiment of the present invention.
Reference numerals:
1: a housing; 2: a feed pipe; 3: an overflow trough; 4: a tailings discharge pipe; 5: water flow rises to the distribution plate; 6: a liquid inlet pipe; 7: an ultrasonic generator; 8: an accommodating chamber; 9: a feeding pump; 10: a discharge valve; 11: a stirring assembly; 111: a drive shaft; 112: a stirring blade; 12: an interfering component; 121: an interference post; 13: a densitometer; 14: a controller; 15: a concentrate discharge pipe; 16: and (5) fixing the plate.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or assembly referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
FIG. 1 is a schematic view of an apparatus for sorting carbon residue in gasified slag according to an embodiment of the present invention. As shown in figure 1, the device for sorting carbon residue in gasified slag comprises a shell 1, a feeding pipe 2, an overflow chute 3, a tailing discharge pipe 4, a water flow ascending distribution plate 5, a liquid inlet pipe 6 and an ultrasonic generator 7.
An accommodating cavity 8 is formed in the shell 1, and the shell 1 is provided with a liquid inlet, a concentrate outlet and a tailing outlet which are communicated with the accommodating cavity 8; the feeding pipe 2 is erected in the accommodating cavity 8, and a feeding pump 9 is installed on the feeding pipe; the overflow groove 3 is sleeved on the shell 1 at one end of the concentrate outlet, and the overflow groove 3 is provided with a discharge opening; the tailing discharge pipe 4 is communicated with the tailing outlet, and a discharge valve 10 is arranged on the tailing discharge pipe 4; the first end of the water flow ascending distribution plate 5 is connected with the inner wall of the shell 1, the second end of the water flow ascending distribution plate 5 is connected with one end of the tailing discharge pipe 4 inserted into the accommodating cavity 8 and covers the cross section between the inner wall of the shell 1 and the tailing discharge pipe 4, a plurality of through holes are formed in the water flow ascending distribution plate 5, and the liquid inlet is formed in one side, facing the tailing outlet, of the water flow ascending distribution plate 5; the liquid inlet pipe 6 is communicated with the liquid inlet; the ultrasonic generator 7 is arranged in the accommodating cavity 8.
When the device is used, the feeding pump 9 is started, prefabricated ore pulp enters the shell 1 through the feeding pipe 2, water flows into the shell 1 through the liquid inlet pipe 6 at the lower part, and continuously flows upwards through the through holes formed in the water flow ascending distribution plate 5 and is uniformly distributed in the shell 1, the ore pulp is mixed with the water flow, the relative densities of coal gasification slag particles with different components in the ore pulp and the water flow are different, carbon-rich slag with lower density in the coal gasification slag particles has a floating trend, ash particles with higher density and molten slag have a sinking trend, meanwhile, the ultrasonic generator 7 is started, the ultrasonic generator 7 emits ultrasonic waves, the density difference between the coal gasification slag particles is strengthened under the high-frequency vibration effect of the ultrasonic waves, the carbon-rich slag with lower density completely floats to the concentrate outlet, is discharged to the overflow groove 3 sleeved with the shell 1 through the concentrate outlet under the effect of the water flow, and is finally discharged through the discharge port of the overflow groove 3 and collected; and the great ash granule of density and melting slag subside completely and be intercepted to on the rivers ascending distribution plate 5, and follow rivers ascending distribution plate 5 gliding aggregation extremely tailing discharge pipe 4, after the device operation a period, or judge the ash granule of aggregation and melting slag etc. when the sediment is too much in tailing discharge pipe 4, open in the tailing discharge pipe 4 blow off valve 10 discharges ash granule and melting slag and collects to accomplish the separation of carbon-rich sediment and ash granule and melting slag in the ore pulp, also accomplish the separation of concentrate and tailing in the ore pulp.
By adopting the device for separating carbon residue in gasified slag, ore pulp is injected into the shell 1 from the feeding pipe 2 at the upper part, water flow enters the shell 1 through the liquid inlet pipe 6 at the lower part and the water flow ascending distribution plate 5, the ultrasonic generator 7 in the shell 1 emits ultrasonic waves while the ascending water flow and the descending ore pulp interact, the density difference is strengthened by the ultrasonic waves, and the separation precision and the separation efficiency of carbon ash in the gasified slag are improved.
In this embodiment, as shown in fig. 1, the casing 1 is a hollow cylinder, the upper surface of the casing is not closed, an opening of the casing forms the concentrate outlet, the overflow chutes 3 are circumferentially installed on the outer wall of the casing 1 at one end of the concentrate outlet, the tailing outlet is formed in the center of the lower surface of the casing and is communicated with the tailing discharge pipe 4, the upper end of the tailing discharge pipe 4 is inserted into the casing 1 for a certain distance, a plurality of through holes are uniformly penetrated through the water flow rising distribution plate 5, and two opposite ends of the through holes are respectively fixedly connected with the inner wall of the casing 1 and the outer wall of the upper end portion of the tailing discharge pipe 4 and form a certain inclination angle towards the tailing discharge pipe 4, so that the sorted and fallen coal gasification slag particles with high density completely fall onto the water flow rising distribution plate 5 and slide down to the tailing discharge pipe 4 along the inclined plane of the water flow rising distribution plate 5. As shown in fig. 1, the inlet is opened in the bottom left side of casing 1, is less than the position of rivers rising distribution plate 5, and the intercommunication feed liquor pipe 6, rivers warp feed liquor pipe 6 gets into behind the casing 1, warp again rivers rise behind the 5 homodisperses of distribution plate, inlet pipe 2 erects in the central point of casing 1 puts the effect of feeding pump 9 is drawn the ore pulp into in the casing 1 to with the rivers mixture that rises. In this embodiment, four ultrasonic generators 7 are provided, and can be installed at any position in the casing 1, as long as the emitted ultrasonic waves can act on the gasified slag particles in the ore slurry, so as to strengthen the density difference between the particles. According to the practical application, the number of the ultrasonic generators 7 can be adjusted, the shape and size of the shell 1, the specific positions of the liquid inlet, the concentrate outlet and the tailing outlet on the shell 1 can be adjusted, the specific inclination angle of the water flow ascending distribution plate 5 can be adjusted, as long as the injected ore pulp and water flow can be fully mixed under the action of the ultrasonic waves emitted by the ultrasonic generators 7, the density difference can be strengthened by different gasified slag particles in the ore pulp, the particles with smaller density can completely float upwards and are discharged through the concentrate outlet and the overflow chute 3, and the particles with larger density can completely sink and are discharged through the tailing discharge pipe 4. The feeding amount of ore pulp entering through the feeding pipe 2 and the ascending water flow entering through the liquid inlet pipe 6 can be adjusted, and the separation of products with different density levels is realized by controlling the ascending water flow velocity, the feeding amount of the ore pulp and the like.
Optionally, the device for sorting carbon residue in gasified slag further comprises a stirring assembly 11, and the stirring assembly 11 is erected in the accommodating cavity 8. The stirring assembly 11 is arranged to fully stir the ore pulp and water flow in the shell 1, so that coal gasification slag particles in the ore pulp are uniformly dispersed in the shell 1, carbon-ash separation is strengthened, and the gravity separation effect is improved.
In this embodiment, four sets of the stirring assemblies 11 are provided, the fixing plate 16 is sleeved on the circumferential direction of the feeding pipe 2, and the four sets of the stirring assemblies 11 are respectively installed on the fixing plate 16 at intervals. When the device is operated, the feeding pump 9 and the ultrasonic generator 7 are started, and the stirring assembly 11 is started. According to the practical application, the number of the stirring assemblies 11 can be adjusted, and any structural form can be adopted, so long as the ore pulp and the water flow entering the shell 1 can be fully stirred.
Optionally, the stirring assembly 11 comprises a motor (not shown), a transmission shaft 111 and a stirring blade 112. The motor is erected in the accommodating cavity 8; the transmission shaft 111 is in driving connection with the motor; the stirring blade 112 is fixedly connected with the transmission shaft 111. This arrangement simplifies the construction of the stirring assembly 11 and facilitates assembly and operation.
In this embodiment, as shown in fig. 1, four sets of the stirring assemblies 11 are provided, and are installed at intervals on a fixing plate 16 sleeved on the circumferential direction of the feeding pipe 2, a motor in each set of the stirring assemblies 11 is fixed on the fixing plate 16, the transmission shaft 111 is fixedly connected with an output shaft of the motor, and the plurality of stirring blades 112 are fixed at intervals on the circumferential direction of the lower end of the transmission shaft 111. When the motor is started, the motor drives the output shaft of the motor to rotate, so as to drive the transmission shaft 111 fixedly connected with the output shaft to rotate in the same direction, and finally drive the stirring blades 112 fixedly connected with the transmission shaft 111 to rotate in the same direction, so that ore pulp and water flow in the shell 1 are fully stirred. In the present embodiment, one ultrasonic generator 7 is mounted to the lower end of each of the transmission shafts 111 in fig. 1.
Optionally, the device for sorting carbon residue in gasified slag further comprises an interference component 12, and the interference component 12 is connected with the inner wall of the accommodating cavity 8 on the side of the water flow ascending distribution plate 5 facing away from the tailing outlet, and is used for preventing channeling or swirling flow from occurring in the shell 1. Channeling or eddy currents appear in the shell 1, so that ore pulp and water flow cannot be sufficiently mixed, coal gasification slag particles in the ore pulp cannot be sufficiently separated according to density difference, the interference component 12 is arranged to fully influence the motion states of water and ash slag, the channeling or eddy currents are interfered, carbon-ash separation can be enhanced, and the gravity separation effect is improved.
As shown in fig. 1, in the present embodiment, the disturbance assembly 12 is disposed in a space between the stirring assembly 11 and the water flow rising distribution plate 5. The disturbing assembly 12 may be of any construction according to the actual application, as long as it can influence the motion state of the water and ash to avoid channeling or swirling flow.
Optionally, the interference component 12 includes a plurality of interference columns 121, and the plurality of interference columns 121 are connected to the inner wall of the accommodating cavity 8 at intervals. This arrangement simplifies the structural assembly of the interference assembly 12 for ease of assembly and operation.
As shown in fig. 1, in this embodiment, the interference pillars 121 are cylindrical rod bodies, a plurality of interference pillars 121 are arranged in parallel to each other, and are fixed on the inner wall of the casing 1 at three rows of horizontal intervals, and the water flow rising through the water flow rising distribution plate 5 and the ore slurry entering the casing 1 through the feeding pipe 2 are fully mixed after passing through the gaps between the adjacent interference pillars 121. According to practical application, the size, number and specific connection position of the interference columns 121 with the inner wall of the housing 1 can be adjusted.
Optionally, the device for sorting carbon residue in the gasified slag further comprises a density meter 13 and a controller 14. The densimeter 13 is arranged in the accommodating cavity 8; an input of the controller 14 is communicatively coupled to an output of the densitometer 13, and an output of the controller 14 is communicatively coupled to a control of the discharge valve 10. In this arrangement, the controller 14 controls the discharge valve 10 to be automatically opened or closed according to the density data monitored by the densimeter 13, so as to realize the automatic discharge of the tailings.
In this embodiment, the discharging valve 10 is an electric control valve, the densimeter 13 monitors in real time the density data of the mixture of the ore pulp and the water flow injected into the containing cavity 8, and transmits the density data to the controller 14, a set density threshold is pre-stored in the controller 14, when the density data is greater than or equal to the set density threshold, it indicates that the water flow ascending distribution plate 5 sinks in the containing cavity 8 and accumulates to the ash particles and the molten slag with larger density in the tailing discharge pipe 4 are too much, at this time, the controller 14 controls the discharging valve 10 to open, so that the ash particles, the molten slag and other sinking slag are discharged through the tailing discharge pipe 4, when the density data is less than the set density threshold, it indicates that the water flow ascending distribution plate 5 sinks in the containing cavity 8 and accumulates to the ash particles and the molten slag with larger density in the tailing discharge pipe 4 are in a reasonable range, at this time, the controller 14 controls the discharging valve 10 to close, and then the ash particles, the molten slag and other sinking slag stop discharging continuously. The controller 14 controls the open/close control logic of the discharge valve 10 according to the change of the density data, and the control logic can be realized according to the existing mature algorithm, and the specific working principle is not described herein again. The densitometer 13 may be any commercially available standard that satisfies the conditions for measuring the density of the mixture, depending on the application.
Optionally, the device for sorting carbon residue in gasified slag further comprises a pressure gauge (not shown) disposed in the accommodating cavity 8, and an output end of the pressure gauge is in communication connection with an input end of the controller 14. With this arrangement, the controller 14 controls the automatic opening or closing of the discharge valve 10 based on the pressure data monitored by the pressure gauge and the density data monitored by the densitometer 13, thereby preventing a single component failure from causing an open/close failure of the discharge valve 10.
In this embodiment, manometer real-time supervision hold the pressure data of the ore pulp of injecting in the chamber 8 and the mixture of rivers, and with pressure data transmission extremely controller 14, the inside prestore of controller 14 sets for the pressure threshold value, works as pressure data is greater than or equal to when setting for the pressure threshold value, indicate hold in the chamber 8 to sink to gather extremely water current rise distribution plate 5 and the great grey granule of density and the melting sediment of tails discharge pipe 4 are too much, at this moment, controller 14 control blow-off valve 10 is opened, and then sediment processes such as grey granule and melting sediment tailings drain pipe 4 are discharged, work as pressure data is less than when setting for the pressure threshold value, indicate to sink in holding the chamber 8 to gather extremely water current rise distribution plate 5 and the great grey granule of density and the melting sediment of tails discharge pipe 4 are at reasonable within range, at this moment, controller 14 control blow-off of blow-off valve 10, then ash granule and slag such as melting sediment stop to continue to discharge. When the densimeter 13 and the pressure gauge both work normally, the corresponding relationship between the density data and the set density threshold value and the corresponding relationship between the pressure data and the set pressure threshold value are matched, so that the conclusion obtained by the controller 14 for controlling the opening or closing of the discharge valve 10 is consistent, and when the densimeter 13 (the pressure gauge) fails to work, the controller 14 controls the opening and closing of the discharge valve 10 according to the measurement result of the pressure gauge (the densimeter 13).
Optionally, the device for separating carbon residue in gasified slag further comprises a concentrate discharge pipe 15, and the concentrate discharge pipe 15 is connected with the outer wall of the shell 1 and communicated with the discharge port. With the arrangement, the carbon-rich slag with low density overflowing to the overflow groove 3 falls into the discharge pipe 15 through the discharge opening, and the discharge pipe 15 can extend to a set position, so that the carbon-rich slag can be collected conveniently.
In this embodiment, as shown in fig. 1, the fine material discharge pipe 15 is fixed on the outer wall of the top left side of the housing 1, and a feed inlet is opened at a position corresponding to the discharge port of the overflow chute 3, so that the carbon-rich slag floating from the accommodating chamber 8 to overflow to the overflow chute 3 enters the feed inlet of the fine material discharge pipe 15 through the discharge port, and is finally discharged and collected through the fine material discharge pipe 15. In order to facilitate the gathering of the carbon-rich slag, the overflow chute 3 can be inclined at a certain angle towards the discharge opening.
The use process of the device for separating carbon residue in gasified slag is further described in the following with reference to fig. 1:
when the device uses, starts feeding pump 9, then prefabricated ore pulp warp inlet pipe 2 gets into in the casing 1, rivers pass through the lower part feed liquor pipe 6 gets into in the casing 1, and the warp continue rising flow behind a plurality of through-hole evenly distributed who sets up on the rivers ascending distribution plate 5, the rivers that rise pass adjacent respectively with the ore pulp of pouring into carry out the intensive mixing behind the clearance between the interference post 121. Meanwhile, the ultrasonic generator 7 and the stirring assembly 11 are started, the gasified slag is uniformly dispersed in the accommodating cavity 8 through the stirring assembly 11, the carbon-ash separation in the gasified slag particles is promoted through ultrasonic enhancement, and the interference column 121 prevents channeling or large eddy current from occurring in the accommodating cavity 8 to influence the separation effect, so that the motion states of water and ash are fully influenced under the combined action of various forces, the density difference among the gasified slag particles is enhanced, the carbon-rich slag with lower density completely floats to the concentrate outlet, is discharged to the overflow groove 3 sleeved with the shell 1 through the concentrate outlet under the action of water flow, and is finally discharged and collected through the discharge port of the overflow groove 3 and the concentrate discharge pipe 15; and the sinking slag such as ash particles with high density, molten slag and the like completely sinks and is intercepted on the water flow rising distribution plate 5, and slides down along the water flow rising distribution plate 5 and is gathered to the tailing discharge pipe 4. Densimeter 13 real-time supervision hold the density data in the chamber 8, pressure gauge real-time supervision hold the pressure data in the chamber 8, controller 14 basis density data with the change of pressure data controls in the tails delivery pipe 4 discharge valve 10 is automatic to be opened or to be closed, realizes the automatic discharge and the collection of sediment such as ash granule and fused slag to accomplish the separation of carbon-enriched sediment and ash granule and fused slag in the ore pulp, also accomplish the separation of concentrate and tails in the ore pulp.
By adopting the device for separating carbon residue in gasified slag, ore pulp is injected into the shell 1 from the feeding pipe 2 at the upper part, water flow enters the shell 1 through the liquid inlet pipe 6 at the lower part and the water flow ascending distribution plate 5, the ultrasonic generator 7 in the shell 1 emits ultrasonic waves while the ascending water flow and the descending ore pulp interact, the density difference is strengthened by the ultrasonic waves, and the separation precision and the separation efficiency of carbon ash in the gasified slag are improved.
The invention also provides a method for separating carbon residue in gasified slag, and the device for separating carbon residue in gasified slag based on any one of the embodiments comprises the following steps:
s1, adding water into the gasified slag to prepare ore pulp with a set concentration.
Sending a large amount of gasified slag to be separated into an ore pulp preparation device through conveying equipment, adding water and fully stirring the gasified slag to fully disperse the gasified slag to prepare ore pulp with the mass concentration of 50-300 g/L.
And S2, carrying out wet screening and grading on the ore pulp, directly collecting particles with the particle size smaller than the set particle size after filter pressing, and screening the particles with the particle size larger than or equal to the set particle size into ore pulp with different particle sizes.
Uniformly sampling the gasified slag by using a random multipoint sampling and cone stacking quartering method, drying the obtained representative gasified slag, mechanically screening (8-10 grain grades), obtaining the residual carbon content and yield characteristic rules of the slag with different grain grades, and determining 2-5 screened grain grades according to the carbon content distribution and the grain grade distribution. And (3) according to the determined screening grade, adopting a multi-stage mechanical screen to carry out wet screening and grading on the ore pulp respectively, wherein the wet screening and grading comprises the step of carrying out wet grain size grading by adopting screening equipment such as a linear vibrating screen, a grading screen, a drum screen and the like. The particles with the particle size smaller than the set particle size (the carbon content is less than 10 percent) are directly treated as high ash slag or carbon-containing slag after being filter-pressed, and are not separated, and the particles with the particle size larger than the set particle size are screened into fine slag ore pulp with a plurality of particle size grades according to the determined screening particle size.
And S3, respectively injecting ore pulp of different grain sizes into the shell of the device for separating carbon residue in the gasified slag, respectively separating, discharging upper floating slag from a discharge port of the overflow groove, and discharging lower settled slag from a tailing discharge pipe.
And aiming at ore pulp of different size grades, adjusting the ore pulp feeding amount and the ascending water flow rate of the device for separating carbon residue in gasified slag, and realizing the separation of products of different density grades by controlling the ascending water flow velocity, the ore pulp feeding amount and the like. The separation conditions of the particles with different particle size gradients are different, the ore pulp is divided into ore pulp with different particle sizes, and the ore pulp is respectively injected into the device to separate upper scum from lower scum by using density difference, so that the mutual interference of the particles with different particle sizes in the separation process can be reduced.
And S4, carrying out filter pressing on the floating slag to obtain a concentrate, and carrying out filter pressing on the sinking slag to obtain a tailing.
The water content of the concentrate and the tailings after filter pressing is lower than 30 percent, which is convenient for transportation and further treatment. The tailing can be directly used for filling building materials and roadbeds when the carbon content is low, and the concentrate can be used for high-valued utilization of rubber fillers, catalyst carriers and the like due to the high carbon content.
The method for separating the carbon residue in the gasified slag concentrates the particles in a certain particle size range through particle size classification, reduces the mutual interference of the particles with different particle sizes in the separation process, strengthens the density difference of the gasified slag particles through the ultrasonic generator 7, realizes the separation of carbon and ash in the slag under the water medium condition, has simple production flow, low energy consumption, no secondary pollution, high separation precision and separation efficiency, has lower requirement on the conditions of gasified slag materials, and has wide application range.
Optionally, the filter liquor obtained after the filter pressing of the upper scum and the lower scum is filtered and then is recycled as circulating water.
After the filter liquor obtained after the filter pressing of the upper scum and the lower scum is filtered, one part of the filter liquor is added with a gasified scum raw material to prepare ore pulp, the other part of the filter liquor is used as spraying water of screening equipment, and the other part of the filter liquor enters the shell 1 through the liquid inlet pipe 6 to provide ascending water flow and is used as a separation medium to participate in the separation process of the upper scum and the lower scum again.
The flow chart of the method for sorting carbon residue in gasified slag is shown in figure 2.
The following is an example of the present invention for separating carbon residue from gasified slag.
Example 1
The method for separating the carbon residue from the Xinjiang coal gasification fine slag comprises the following steps:
(1) The coal gasification slag is determined to be screened into 4 size fractions through preliminary experiments.
(2) The gasified fine slag is conveyed into an ore pulp preparation barrel through conveying equipment, and water and the fine slag are added and fully stirred to be fully dispersed to prepare ore pulp with the mass concentration of 200 g/L.
(3) Carrying out wet screening and grading on the ore pulp by using a vibrating screen to obtain fine particles with the particle size of less than 74 mu m, and directly taking the fine particles as a carbon-containing residue product after filter pressing; sieving particles larger than 74 mu m into fine slag ore pulp with three particle sizes of larger than 450 mu m, 150-450 mu m and 74-150 mu m for separation;
(4) The ore pulp within the above three particle size ranges is respectively injected into the shell 1 through the upper feeding pipe 2, water enters the shell 1 through the water flow ascending distribution plate 5, under the action of the ultrasonic generator 7, the interference column 121 and the stirring assembly 11, the gasified slag particles are enabled to strengthen density difference inside the shell 1 so as to complete separation, the carbon-rich slag is enabled to float upwards to obtain concentrate due to lighter density, ash particles and molten slag with larger density fall onto the water flow ascending distribution plate 5, and the concentrate is further discharged from the tailing discharge pipe 4 to obtain tailing.
(5) The carbon content of the concentrate and the tailing obtained by separation is shown in table 1, the carbon content of the concentrate in three grain size sections is more than 80%, the carbon content of the obtained concentrate is 85.85%, and the ash content of the tailing is 73.54%.
TABLE 1 carbon residue results from fine slag separation in Xinjiang
Example 2
The method for separating the carbon residue in the elm forest gasified coarse slag comprises the following steps:
(1) The coal gasification slag is determined to be screened into 3 size fractions through preliminary experiments.
(2) Conveying gasified coarse slag into an ore pulp preparation barrel through conveying equipment, adding water and coarse slag, fully stirring to fully disperse the coarse slag, and preparing into ore pulp with the mass concentration of 100 g/L;
(3) Carrying out wet screening and grading on the ore pulp by using a vibrating screen, and directly collecting the obtained fine particles with the particle size of less than 200 mu m after filter pressing; sieving particles larger than 200 μm into fine slag ore pulp with two particle sizes of larger than 450 μm and 200-450 μm for separation;
(4) The ore pulp within the two particle size ranges is respectively injected into the shell 1 through the upper feeding pipe 2, water enters the shell 1 through the water flow ascending distribution plate 5, under the action of the ultrasonic generator 7, the interference column 121 and the stirring assembly 11, the gasification slag particles are enabled to strengthen density difference inside the shell 1 to complete separation, carbon-rich slag is enabled to float upwards to obtain concentrate due to light density, ash particles and molten slag with large density fall onto the water flow ascending distribution plate 5, and the concentrate is further discharged from the tailing discharge pipe 4 to obtain tailing.
(5) The carbon content of the concentrate and the tailings obtained by separation is shown in Table 2, the carbon content of the concentrate with particle size fractions of more than 450 micrometers and 200-450 micrometers is 77.60% and 66.17%, the carbon content of the obtained concentrate is 66.99%, and the ash content of the tailings is 11.17%.
TABLE 2 Ullin coarse residue sorting carbon residue results
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a device of carbon residue in separation coal gasification sediment which characterized in that includes:
the device comprises a shell, a feeding device and a discharging device, wherein a containing cavity is arranged in the shell, and the shell is provided with a liquid inlet, a concentrate outlet and a tailing outlet which are communicated with the containing cavity;
the feeding pipe is erected in the accommodating cavity and is provided with a feeding pump;
the overflow groove is sleeved on the shell at one end of the concentrate outlet and provided with a discharge opening;
the tailing discharge pipe is communicated with the tailing outlet, and a discharge valve is arranged on the tailing discharge pipe;
a first end of the water flow ascending distribution plate is connected with the inner wall of the shell, a second end of the water flow ascending distribution plate is connected with one end of the tailing discharge pipe inserted into the accommodating cavity and covers the cross section between the inner wall of the shell and the tailing discharge pipe, a plurality of through holes are formed in the water flow ascending distribution plate, and the liquid inlet is formed in one side, facing the tailing outlet, of the water flow ascending distribution plate;
the liquid inlet pipe is communicated with the liquid inlet;
an ultrasonic generator disposed within the accommodation chamber.
2. The apparatus for sorting carbon residue in gasified slag according to claim 1, further comprising:
the stirring subassembly, the stirring subassembly erects in hold the intracavity.
3. The apparatus for sorting carbon residue in gasified slag according to claim 2, wherein the stirring unit comprises:
the motor is erected in the accommodating cavity;
the transmission shaft is in driving connection with the motor;
and the stirring blade is fixedly connected with the transmission shaft.
4. The apparatus for sorting carbon residue in gasified slag according to any one of claims 1 to 3, further comprising:
the interference component is arranged on one side, back to the tailing outlet, of the water flow ascending distribution plate and connected with the inner wall of the accommodating cavity, and is used for preventing channeling or eddy current from occurring in the shell.
5. The apparatus for separating carbon residue from gasified slag according to claim 4, wherein the interference unit comprises:
many disturb the post, many disturb the post with hold the inner wall interval connection in chamber.
6. The apparatus for sorting carbon residue in gasified slag according to any one of claims 1 to 3, further comprising:
the densimeter is arranged in the accommodating cavity;
a controller, an input of the controller being communicatively connected to an output of the densitometer, an output of the controller being communicatively connected to a control of the drain valve.
7. The apparatus for separating carbon residue from gasified slag according to claim 6, further comprising:
the pressure gauge, the pressure gauge set up in hold the intracavity, the output of pressure gauge with the input communication connection of controller.
8. The apparatus for sorting carbon residue in gasified slag according to any one of claims 1 to 3, further comprising:
and the concentrate discharge pipe is connected with the outer wall of the shell and communicated with the discharge port.
9. A method for sorting carbon residue in gasified slag, which is characterized in that the device for sorting carbon residue in gasified slag according to any one of claims 1 to 8 comprises the following steps:
adding water into the gasified slag to prepare ore pulp with a set concentration;
carrying out wet screening and grading on the ore pulp, directly collecting particles with the particle sizes smaller than the set particle size after filter pressing, and screening the particles with the particle sizes larger than or equal to the set particle size into the ore pulp with different particle sizes;
respectively injecting ore pulp of different grain sizes into a shell of the device for separating carbon residue in gasified slag, respectively separating, discharging upper floating slag from a discharge port of an overflow groove, and discharging lower deposited slag from a tailing discharge pipe;
and carrying out filter pressing on the floating slag to obtain a concentrate, and carrying out filter pressing on the sinking slag to obtain a tailing.
10. The method for sorting carbon residue in gasified slag according to claim 9, wherein:
and filtering the filter liquor obtained by filter pressing the upper scum and the lower scum to obtain the filter liquor, and recycling the filter liquor as circulating water.
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| CN202310105936.XA CN115970873A (en) | 2023-01-19 | 2023-01-19 | Device and method for sorting carbon residue in gasified slag |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851408A (en) * | 2023-07-31 | 2023-10-10 | 碳达(深圳)新材料技术有限责任公司 | Gas slag treatment device and method |
| CN117299375A (en) * | 2023-10-24 | 2023-12-29 | 西安科技大学 | Device and method for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration |
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2023
- 2023-01-19 CN CN202310105936.XA patent/CN115970873A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116851408A (en) * | 2023-07-31 | 2023-10-10 | 碳达(深圳)新材料技术有限责任公司 | Gas slag treatment device and method |
| CN117299375A (en) * | 2023-10-24 | 2023-12-29 | 西安科技大学 | Device and method for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration |
| CN117299375B (en) * | 2023-10-24 | 2024-03-08 | 西安科技大学 | Device and method for sorting coal gasification fine slag by ultrasonic cavitation and oil agglomeration |
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