CN113046106A - Processing device and method for improving bulk density of coal fed into furnace - Google Patents
Processing device and method for improving bulk density of coal fed into furnace Download PDFInfo
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- CN113046106A CN113046106A CN202110277199.2A CN202110277199A CN113046106A CN 113046106 A CN113046106 A CN 113046106A CN 202110277199 A CN202110277199 A CN 202110277199A CN 113046106 A CN113046106 A CN 113046106A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
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Abstract
The invention discloses a processing device and a processing method for improving the bulk density of coal as fired, which comprises a material taking device and a high-pressure pressing device, wherein the material taking device is arranged above a coal conveying belt and comprises a shoveling device, a conveying belt, a driving device and a frame, one end of the shoveling device is in contact with pulverized coal on the coal conveying belt, the other end of the shoveling device is positioned above one end of the conveying belt, the other end of the conveying belt is close to the high-pressure pressing device, the high-pressure pressing device comprises a first blanking chute, a high-pressure roller pair and a second blanking chute, the first blanking chute is positioned below the other end of the conveying belt and above the high-pressure roller pair, and the second blanking chute is positioned below a discharge port of the high-pressure roller pair and above the. Meanwhile, a method for improving the bulk density of the coal as fired based on the treatment device is also provided, the purpose of improving the bulk density of the coal as fired can be realized by adding simple equipment on the basis of the existing production process, and the method has the characteristics of reasonable design, simplicity in manufacturing, easiness in operation, low investment, low cost, good universality and the like.
Description
Technical Field
The invention relates to the technical field of metallurgical coking, in particular to a treatment device and a treatment method for improving the bulk density of coal entering a furnace.
Background
The properties of the coal as fired and the coking process are the main aspects affecting the quality of the coke. The factors influencing the coke strength by the coal as fired mainly include indexes such as moisture, ash content, sulfur content, fineness, cohesiveness and coking property. Under the condition of determining the coke oven type and the properties of the coal as fired, the pretreatment of the coking coal and the coking process play an important role in improving the coke quality.
The mass of the coal as fired which can be contained in the coke oven carbonization chamber in unit volume is the bulk density of the coal as fired. Tests and application practices show that as the bulk density of the coal as fired increases, the contact between coal as fired particles becomes tight, so that the outward escape resistance of the gas-phase product of coal as fired pyrolysis becomes large, thereby improving the cohesiveness and coking property of the coal as fired, improving the pore performance of the prepared coke, improving the mechanical strength of the coke, reducing the content of the isotropic structure of the coke and reducing the reactivity of the coke. Therefore, the increase of the coal-to-furnace bulk density has obvious effect on improving the coke quality. In addition, the use amount of non-sticky coal and weakly sticky coal can be increased by increasing the bulk density of the coal entering the furnace.
At present, methods for improving the bulk density of the charged coal mainly comprise adjusting the moisture and the granularity of the charged coal and physical compaction methods, wherein the physical compaction methods comprise matched coal coking, tamping coking and top-loading coal compaction methods. The matched coal coking is a coking mode that part of coal fed into a coke oven is extruded and formed by mechanical force before being charged into the coke oven, and then the coal is mixed with bulk coal according to a certain proportion and charged into the coke oven. Tamping coking is a coking mode that the whole coal as fired is tamped into a coal cake with a volume slightly smaller than that of a coking chamber and the coal cake is laterally arranged in the coking chamber. The main application object of charging coal compaction coking is a top charging coke oven, the coking blended coal in a coking chamber is compacted by a physical compaction method and a mechanical pressurization device through a coal charging hole at the top of the top charging coke oven, and the final aims of increasing the stacking density of the charged coal and improving the coke quality and yield are achieved by multiple repeated compaction-coal supplement-coal leveling-compaction operations under the condition of allowing production time.
In daily production, a coking plant generally improves the bulk density of coal charged into a furnace by a physical compaction method on the basis of water control and particle size control, wherein the coking method of matched coal requires a briquette production line, a certain proportion of binder is added into coal dust during production, a mixture is pressed into a flat sphere, a flat square or a flat rectangular shape, the consumption of a press roller skin is fast, the investment is large, and the production cost is high; tamping coking can only be used for a tamping coke oven, is not suitable for a top-loading coke oven, and has the problems of large-scale bottleneck of a tamping machine, collapse of tamping coal cakes and the like; the top-loading coal compaction method is suitable for the top-loading coke oven, but needs repeated compaction-coal supplement-coal leveling-compaction operations, so that the coal loading time and the coke forming time are prolonged.
Therefore, there is a need to develop a simpler processing apparatus and method for increasing the bulk density of the coal fed into the furnace, with less investment and wider application range.
Disclosure of Invention
Aiming at the defects of the device and the method for improving the bulk density of the coal as fired in the prior art, the invention provides a processing device and a processing method for improving the bulk density of the coal as fired, which are simpler, less in investment and wider in application range.
The invention provides a processing device for improving the bulk density of coal as fired, which is characterized in that: comprises a material taking device and a high-pressure pressing device which are arranged above a coal conveying belt; the material taking device comprises a shoveling device, a conveying belt, a driving device and a rack, wherein one end of the shoveling device is in contact with pulverized coal on the coal conveying belt, the other end of the shoveling device is positioned above one end of the conveying belt, the other end of the conveying belt is close to the high-pressure pressing device, the shoveling device and the conveying belt are fixed on the rack, and the driving device drives the conveying belt to rotate; the high-pressure pressing device comprises a first blanking chute, a high-pressure twin-roll machine and a second blanking chute, wherein the first blanking chute is positioned below the other end of the conveyor belt, the center of a bin of the high-pressure twin-roll machine is positioned below the first blanking chute, the upper end of the second blanking chute is positioned below a discharge hole of the high-pressure twin-roll machine, and the lower end of the second blanking chute is positioned above the coal conveying belt.
Furthermore, the included angle between the shoveling device and the coal conveying belt is 15-45 degrees, the arc size of one end of the shoveling device is the same as or slightly smaller than that of the coal conveying belt, the arc size of the other end of the shoveling device is equal to or smaller than that of one end of the shoveling device, the shoveling device is made of stainless steel or wear-resistant steel, the thickness of the shoveling device is 1-5 mm, the length of the shoveling device is 300-800 mm, and the shoveling device is U-shaped.
Furthermore, the central lines of the conveyor belt and the material shoveling device are on the same vertical plane, the included angle between the conveyor belt and the horizontal direction is 15-90 degrees, and the width of the conveyor belt is 200-500 mm wider than that of the other end of the material shoveling device.
Furthermore, the included angle between the first blanking chute and the horizontal direction is 30-60 degrees, the width of the upper end of the first blanking chute is 200-500 mm larger than the width of the conveying belt, the width of the lower end of the first blanking chute is 20-80% of the caliber of the bin of the high-pressure double-roll machine, the first blanking chute is made of stainless steel or wear-resistant steel, the thickness of the first blanking chute is 1-5 mm, and the first blanking chute is concave.
Further, the high-pressure roll-to-roll machine is a flat roll.
Furthermore, the included angle between the second blanking chute and the horizontal direction is 30-60 degrees, the width of the upper end of the second blanking chute is 200-500 mm wider than the discharge port of the high-pressure double-roll machine, the width of the lower end of the second blanking chute is 200-500 mm smaller than the coal conveying belt, the second blanking chute is made of stainless steel or wear-resistant steel, the thickness of the second blanking chute is 1-5 mm, and the second blanking chute is concave.
The invention also provides a method for improving the bulk density of the coal as fired by using the treatment device, which comprises the following steps:
step A: the material taking device and the high-pressure pressing device are arranged above the coal conveying belt, one end of the shoveling device is inserted into the pulverized coal on the coal conveying belt, and the proportion of the pulverized coal on the coal conveying belt entering the shoveling device is controlled by adjusting the distance between the shoveling device and the coal conveying belt;
and B: the coal dust on the coal conveying belt falls onto the conveying belt through the material shoveling device, and under the action of the driving device, the coal dust on the conveying belt enters a first blanking chute and falls into a bin of a high-pressure double-roll machine;
and C: the coal dust in the bin of the high-pressure double-roller machine is pressed into high-density coal dust, and the high-density coal dust falls into a second blanking chute after coming out of a discharge port of the high-pressure double-roller machine and then falls into a coal conveying belt to perform primary crushing on the high-density coal dust;
step D: the coal powder and the high-density coal powder on the coal conveying belt fall into a coal loader at the same time, and then are loaded into a coke oven by the coal loader, and the high-density coal powder realizes secondary crushing and uniform mixing in the process of entering the coal loader along with the residual coal powder.
Further, in the step A, the distance between the shoveling device and the coal conveying belt is 10-20 mm, and 30-80% of coal powder on the coal conveying belt is controlled to enter the shoveling device.
Further, in the steps C and D, the density of the high-density coal powder is 1.5-2.5 times of that of the coal powder, and the high-density coal powder is in a sheet shape with the thickness of 5-30 mm.
Further, in the step D, the shape of the high-density pulverized coal (10) after the secondary crushing is mainly particles, the particle size is less than 50mm, and the proportion of the particle size larger than 10mm is more than 90%.
In the design of the treatment apparatus provided by the present invention, since the coal belt 1 is generally U-shaped, the scraper 3 is specially designed to be U-shaped and does not directly contact the conveyor belt 4 in order to prevent the coal belt 1 and the conveyor belt 4 from being scraped. The material shoveling device is designed into a U shape, and the pulverized coal 2 shoveled on the material shoveling device 3 can be prevented from being scattered.
In the treatment method provided by the invention, the density control of the high-density coal dust 10 is important, if the density of the high-density coal dust is lower than 1.5 times of that of the mixed coal dust 2, the compressed coal is easy to disperse, if the density of the high-density coal dust is higher than 3 times of that of the mixed coal dust 2, the extremely high pressure is needed, and the higher the pressure of the press is, the higher the price is. The control of the pulverization degree of the high-density pulverized coal 10 after the primary pulverization and the secondary pulverization is also important, and if the high-density pulverized coal 10 is too pulverized, the effect of increasing the bulk density of the coal charged into the furnace is small. The high-density pulverized coal 10 has different particle sizes after being crushed, and the bulk density of the pulverized coal entering the furnace can be improved compared with the molded coal with single particle size.
The invention has the beneficial effects that:
the treatment device for improving the bulk density of the coal as fired provided by the invention can realize the purpose of improving the bulk density of the coal as fired only by adding simple equipment on the basis of keeping the existing production process unchanged, and has the characteristics of reasonable design, simple manufacture, easy operation, less investment, low cost, good universality and the like.
Compared with the existing methods for coking by matching coal, tamping coking and top-loading coal compaction, the treatment method for improving the bulk density of the coal as fired provided by the invention has the characteristics of simple flow, low equipment cost, wide application range and the like, and can be used for further improving the bulk density of the coal as fired by matching with the existing physical compaction method.
The processing device and the processing method for improving the bulk density of the coal as fired provided by the invention are beneficial to improving the coal loading of the coke oven, achieve the aim of improving the yield and the quality of coke, and are also beneficial to increasing the consumption of low-grade coking coal and effectively reducing the production cost of metallurgical coke.
Drawings
FIG. 1 is a schematic view of a treatment apparatus for increasing the bulk density of coal fed into a furnace according to the present invention. The coal conveying device comprises a coal conveying belt 1, coal powder 2, a shoveling device 3, a conveying belt 4, a driving device 5, a frame 6, a first discharging chute 7, a high-pressure double-roll machine 8, a second discharging chute 9, high-density coal powder 10 and a coal loader 11.
FIG. 2 is a schematic view showing the shape of a shoveling device in the processing apparatus for increasing the bulk density of coal charged into a furnace according to the present invention. Wherein, coal conveying belt 1, buggy 2, shovel material ware 3.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The various parts of the drawings are not necessarily to scale. In addition, certain well known components may not be shown.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A processing device for improving the bulk density of coal entering a furnace is shown in figure 1 and comprises a material taking device and a high-pressure pressing device which are arranged above a coal conveying belt 1; the material taking device comprises a shoveling device 3, a conveying belt 4, a driving device 5 and a rack 6, wherein one end of the shoveling device 3 is in contact with coal dust 2 on a coal conveying belt 1, the other end of the shoveling device is positioned above one end of the conveying belt 4, the other end of the conveying belt 4 is close to the high-pressure pressing device, the shoveling device 3 and the conveying belt 4 are fixed by the rack 6, and the driving device 5 drives the conveying belt 4 to rotate; the high-pressure pressing device comprises a first blanking chute 7, a high-pressure double-roller machine 8 and a second blanking chute 9, wherein the first blanking chute 7 is positioned below the other end of the conveyor belt 4, the center position of a storage bin of the high-pressure double-roller machine 8 is positioned below the first blanking chute 7, the upper end of the second blanking chute 9 is positioned below a discharge port of the high-pressure double-roller machine 8, and the lower end of the second blanking chute 9 is positioned above the coal conveying belt 1.
In the treatment device for improving the bulk density of the coal fed into the furnace, the included angle between the shoveling device 3 and the coal conveying belt 1 is 15-45 degrees, the arc size of one end of the shoveling device is the same as the arc size of the coal conveying belt 1, the arc size of the other end of the shoveling device is equal to the arc size of one end of the shoveling device 3, the shoveling device is made of stainless steel or wear-resistant steel, the thickness of the shoveling device is 1-5 mm, the length of the shoveling device is 300-800 mm, and the shoveling device is U-shaped (as shown in figure 2. In other embodiments, the shoveling device 3 may be made of wear-resistant steel, the arc size of one end of the shoveling device may be slightly smaller than the arc size of the coal conveying belt 1, and the arc size of the other end of the shoveling device may be smaller than the arc size of one end of the shoveling device 3, so as to prevent the shoveled coal powder 2 from being scattered during the operation of the shoveling device 3 and falling onto the conveyor belt 4.
In the treatment device for improving the bulk density of the coal fed into the furnace, the central lines of the conveyor belt 4 and the shoveling device 3 are on the same vertical plane, the included angle between the conveyor belt 4 and the horizontal direction is 15-90 degrees, and the width of the conveyor belt 4 is 200-500 mm wider than that of the other end of the shoveling device 3.
In the treatment device for improving the bulk density of the coal fed into the furnace, the included angle between the first blanking chute 7 and the horizontal direction is 30-60 degrees, the width of the upper end of the first blanking chute is 200-500 mm wider than the conveyor belt 4, the width of the lower end of the first blanking chute is 20-80 percent of the caliber of the bin of the high-pressure double-roll machine 8, the first blanking chute is made of stainless steel, the thickness of the first blanking chute is 1-5 mm, and the first blanking chute is concave. In other embodiments, the material of the first blanking chute 7 may also be wear-resistant steel.
In the processing device for improving the bulk density of the coal as fired provided by the invention, the high-pressure double-roll machine 8 is a plane roll.
In the treatment device for improving the bulk density of the coal fed into the furnace, the included angle between the second feeding chute 9 and the horizontal direction is 30-60 degrees, the width of the upper end of the second feeding chute is 200-500 mm wider than the discharge port of the high-pressure double-roll machine 8, the width of the lower end of the second feeding chute is 200-500 mm smaller than the coal conveying belt 1, the second feeding chute is made of stainless steel, the thickness of the second feeding chute is 1-5 mm, and the second feeding chute is concave. In other embodiments, the material of the second feeding chute 9 may also be wear-resistant steel.
In the processing device for improving the bulk density of the coal as fired provided by the invention, the shoveling device 3 is designed into a U shape and does not directly contact with the conveying belt 4 so as to prevent the coal conveying belt 1 and the conveying belt 4 from being scraped. The shoveling device 3 is designed into a U shape, and the pulverized coal 2 shoveled on the shoveling device 3 can be prevented from being scattered.
The method for increasing the bulk density of coal as fired by the treatment apparatus of the present invention will be described with reference to FIG. 1.
According to the step A, the material taking device and the high-pressure pressing device are arranged above the coal conveying belt 1, one end of the shoveling device 3 is inserted into the pulverized coal 2 on the coal conveying belt 1 and keeps a certain safety distance from the coal conveying belt 1, and the coal conveying belt 1 is prevented from being scratched. The proportion of the pulverized coal 2 on the coal conveying belt 1 entering the shoveling device 3 is controlled by adjusting the distance between the shoveling device 3 and the coal conveying belt 1, and the adjustment and determination are mainly carried out according to the density and the crushing condition of the pulverized coal blocks and the actual production condition. When the distance between the shoveling device 3 and the coal conveying belt 1 is 10 mm-20 mm, 30% -80% of the coal powder 2 on the coal conveying belt 1 enters the shoveling device 3.
And further according to the step B, by utilizing the principle that the mixed coal powder on the coal conveying belt keeps inertial motion, the coal powder 2 on the coal conveying belt 1 falls onto the conveying belt 4 through the shoveling device 3, and under the action of the driving device 5, the coal powder 2 on the conveying belt 4 enters the first blanking chute 7 and falls into a bin of the high-pressure double-roll mill 8.
And further according to the step C, pressing the coal dust 2 in the bin of the high-pressure double-roll machine 8 into high-density coal dust 10, wherein the high-density coal dust 10 falls into a second blanking chute 9 after coming out of a discharge hole of the high-pressure double-roll machine 8 and then falls into a coal conveying belt 1, and the high-density coal dust 10 is crushed for the first time. The high-density pulverized coal 10 after the first pulverization is in a sheet shape with the thickness of 5 mm-30 mm, and the density of the high-density pulverized coal is 1.5-2.5 times that of the mixed pulverized coal 2. If the density of the high-density pulverized coal 10 is lower than 1.5 times of that of the mixed pulverized coal 2, the compressed coal is easy to disperse, if the density of the high-density pulverized coal is higher than 2.5 times of that of the mixed pulverized coal 2, the pressure is extremely high, and the higher the pressure of the press is, the higher the price is.
And further according to the step D, the coal powder 2 and the high-density coal powder 10 on the coal conveying belt 1 simultaneously fall into a coal loader 11, and then are loaded into the coke oven by the coal loader 11, and the high-density coal powder 10 is subjected to secondary crushing and uniform mixing in the process of entering the coal loader 11 along with the residual coal powder. The shape of the high-density pulverized coal (10) after the secondary crushing is mainly particles, the particle size is smaller than 50mm, and the proportion of the particle size larger than 10mm is more than 90%. If the high-density pulverized coal 10 is too pulverized, the effect of increasing the bulk density of the charged coal is small. The crushed high-density coal dust 10 has different particle sizes, and the bulk density of the coal dust entering the furnace can be improved compared with the coal dust with single particle size.
The present invention will be further described with reference to the specific use effects of the treatment apparatus and method for increasing the bulk density of coal as fired according to the present invention.
Example 1
Aiming at a 6m top-loading coke oven, the coal loading of a single carbonization chamber is 28t, and the average bulk density of the coal loading is 0.745t/m3After the device and the method provided by the invention are applied, 20% of coal dust is compacted by 1.5 times in the coal dust charging process, so that the coal charging amount can reach 28.8t, and the bulk density can reach 0.778t/m3The bulk density is improved by 4.43 percent, and the coal loading is improved by 2.86 percent.
Example 2
Aiming at a 6m top-loading coke oven, the coal loading of a single carbonization chamber is 28t, and the average bulk density of the coal loading is 0.745t/m3After the device and the method provided by the invention are applied, 50% of coal dust is compacted by 2 times in the process of feeding the coal dust into the furnace, so that the coal loading can reach 29.9t, and the bulk density can reach 0.802t/m3The bulk density is improved by 7.65 percent, and the coal loading is improved by 6.79 percent.
Example 3
Aiming at a 6m top-loading coke oven, the coal loading of a single carbonization chamber is 28t, and the average bulk density of the coal loading is 0.745t/m3After the device and the method provided by the invention are applied, 80% of coal dust is compacted by 3 times in the process of feeding the coal dust into the furnace, so that the coal loading can reach 30.3t, and the bulk density can reach 0.816t/m3Increase in bulk densityThe height is 9.53 percent, and the coal loading is improved by 8.21 percent.
Example 4
Aiming at a 6m top-loading coke oven, the coal loading of a single carbonization chamber is 28t, and the average bulk density of the coal loading is 0.745t/m3After the device and the method provided by the invention are applied, 20% of coal dust is compacted by 3 times in the coal dust charging process, so that the coal charging amount can reach 29.2t, and the bulk density can reach 0.782t/m3The bulk density is improved by 4.97%, and the coal loading is improved by 4.29%.
Example 5
Aiming at a 6m top-loading coke oven, the coal loading of a single carbonization chamber is 28t, and the average bulk density of the coal loading is 0.745t/m3After the device and the method provided by the invention are applied, 80% of coal dust is compacted by 1.5 times in the process of feeding the coal dust into the furnace, so that the coal loading can reach 29.8t, and the bulk density can reach 0.795t/m3The bulk density is improved by 6.71 percent, and the coal loading is improved by 6.43 percent.
In conclusion, the coal charging amount of the coke oven is obviously improved by using the treatment method disclosed by the invention, so that the yield and the quality of coke can be improved. It should be understood that the above-mentioned embodiments only show the preferred implementation effect of the processing device and method for increasing the bulk density of coal as fired provided by the present invention applied to a 6m top-loading coke oven, but not limited to the 6m top-loading coke oven, and can also be applied to other various types and models of coke ovens known to those skilled in the art.
It should be noted that the above detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the foregoing detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, like numerals typically identify like components, unless context dictates otherwise. The illustrated embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an improve processing apparatus who gets into stove coal bulk density which characterized in that: comprises a material taking device and a high-pressure pressing device which are arranged above a coal conveying belt (1); the material taking device comprises a shoveling device (3), a conveying belt (4), a driving device (5) and a rack (6), one end of the shoveling device (3) is in contact with coal dust (2) on a coal conveying belt (1), the other end of the shoveling device is positioned above one end of the conveying belt (4), the other end of the conveying belt (4) is close to the high-pressure pressing device, the shoveling device (3) and the conveying belt (4) are fixed by the rack (6), and the driving device (5) drives the conveying belt (4) to rotate; the high-pressure pressing device comprises a first blanking chute (7), a high-pressure double-roller machine (8) and a second blanking chute (9), wherein the first blanking chute (7) is located below the other end of the conveyor belt (4), the center of a bin of the high-pressure double-roller machine (8) is located below the first blanking chute (7), the upper end of the second blanking chute (9) is located below a discharge hole of the high-pressure double-roller machine (8), and the lower end of the second blanking chute (9) is located above the coal conveying belt (1).
2. The apparatus according to claim 1, wherein the apparatus comprises: the included angle between the shoveling device (3) and the coal conveying belt (1) is 15-45 degrees, the arc size of one end of the shoveling device is the same as or slightly smaller than that of the coal conveying belt (1), the arc size of the other end of the shoveling device is equal to or smaller than that of one end of the shoveling device (3), the shoveling device is made of stainless steel or wear-resistant steel, the thickness of the shoveling device is 1-5 mm, the length of the shoveling device is 300-800 mm, and the shoveling device is U-shaped.
3. The apparatus according to claim 1, wherein the apparatus comprises: the central lines of the conveyor belt (4) and the shoveling device (3) are on the same vertical plane, the included angle between the conveyor belt (4) and the horizontal direction is 15-90 degrees, and the width of the conveyor belt (4) is 200-500 mm wider than that of the other end of the shoveling device (3).
4. The apparatus according to claim 1, wherein the apparatus comprises: the included angle between the first blanking chute (7) and the horizontal direction is 30-60 degrees, the width of the upper end of the first blanking chute is 200-500 mm wider than that of the conveying belt (4), the width of the lower end of the first blanking chute is 20-80 percent of the caliber of the bin of the high-pressure double-roll machine (8), the first blanking chute is made of stainless steel or wear-resistant steel, the thickness of the first blanking chute is 1-5 mm, and the first blanking chute is concave.
5. The apparatus according to claim 1, wherein the apparatus comprises: the high-pressure roll-pair machine (8) is a plane roll.
6. The apparatus according to claim 1, wherein the apparatus comprises: the included angle between the second blanking chute (9) and the horizontal direction is 30-60 degrees, the width of the upper end of the second blanking chute is 200-500 mm wider than the discharge port of the high-pressure double-roll machine (8), the width of the lower end of the second blanking chute is 200-500 mm smaller than the coal conveying belt (1), the second blanking chute is made of stainless steel or wear-resistant steel, the thickness of the second blanking chute is 1-5 mm, and the second blanking chute is concave.
7. A method for improving the bulk density of coal fed into a furnace by using the treatment device of claims 1-6 comprises the following steps:
step A: the material taking device and the high-pressure pressing device are arranged above the coal conveying belt (1), one end of the shoveling device (3) is inserted into the pulverized coal (2) on the coal conveying belt (1), and the proportion of the pulverized coal (2) on the coal conveying belt (1) entering the shoveling device (3) is controlled by adjusting the distance between the shoveling device (3) and the coal conveying belt (1);
and B: the coal dust (2) on the coal conveying belt (1) falls onto the conveyor belt (4) through the shoveling device (3), and under the action of the driving device (5), the coal dust (2) on the conveyor belt (4) enters a first blanking chute (7) and falls into a bin of a high-pressure double-roll machine (8);
and C: the coal dust (2) in the bin of the high-pressure double-roller machine (8) is pressed into high-density coal dust (10), the high-density coal dust (10) falls into a second feeding chute (9) after coming out of a discharge hole of the high-pressure double-roller machine (8), then falls into a coal conveying belt (1), and the high-density coal dust (10) is crushed for the first time;
step D: the pulverized coal (2) and the high-density pulverized coal (10) on the coal conveying belt (1) fall into a coal loader (11) at the same time, and then are loaded into the coke oven through the coal loader (11), and secondary crushing and uniform mixing are realized in the process that the high-density pulverized coal (10) enters the coal loader along with the residual pulverized coal (2).
8. The method for increasing the bulk density of coal as fired according to claim 7 wherein: in the step A, the distance range between the shoveling device (3) and the coal conveying belt (1) is 10-20 mm, and 30-80% of the coal powder (2) on the coal conveying belt (1) is controlled to enter the shoveling device (3).
9. The method for increasing the bulk density of coal as fired according to claim 7 wherein: in the steps C and D, the density of the high-density coal dust (10) is 1.5-2.5 times that of the coal dust (2), and the high-density coal dust is in a sheet shape with the thickness of 5-30 mm.
10. The method for increasing the bulk density of coal as fired according to claim 7 wherein: in the step D, the shape of the high-density coal powder (10) after the secondary crushing is mainly particles, the particle size is less than 50mm, and the proportion of the particle size larger than 10mm is more than 90%.
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