CN117900045A - Fuel coal sorting device and screening control method - Google Patents
Fuel coal sorting device and screening control method Download PDFInfo
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- CN117900045A CN117900045A CN202410121244.9A CN202410121244A CN117900045A CN 117900045 A CN117900045 A CN 117900045A CN 202410121244 A CN202410121244 A CN 202410121244A CN 117900045 A CN117900045 A CN 117900045A
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- air supply
- cyclone
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- fuel coal
- tower
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- 239000000446 fuel Substances 0.000 title claims abstract description 56
- 239000003245 coal Substances 0.000 title claims abstract description 47
- 238000012216 screening Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 19
- 239000000463 material Substances 0.000 claims abstract description 120
- 239000006185 dispersion Substances 0.000 claims abstract description 37
- 239000011796 hollow space material Substances 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims description 71
- 238000007599 discharging Methods 0.000 claims description 41
- 230000007246 mechanism Effects 0.000 claims description 31
- 238000009826 distribution Methods 0.000 claims description 20
- 239000004744 fabric Substances 0.000 claims description 17
- 238000007664 blowing Methods 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 239000010419 fine particle Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 19
- 230000008569 process Effects 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- 230000001965 increasing effect Effects 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 8
- 239000004449 solid propellant Substances 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000008247 solid mixture Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 229910052799 carbon Inorganic materials 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/08—Vortex chamber constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/08—Vortex chamber constructions
- B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a fuel coal sorting device, which relates to the technical field of bulk powder sorting and comprises a dispersion guide tower, a cyclone separator, a blanking valve, a first fan component, a second fan component and a third fan component, wherein a hollow material passing cavity is arranged in the dispersion guide tower, a flow dividing discharge hole is arranged at the bottom of the dispersion guide tower, a plurality of flow dividing discharge holes are sequentially arranged along the circumferential direction of the dispersion guide tower, the first fan component is used for supplying air into the hollow material passing cavity, the cyclone separator and the flow dividing discharge holes are arranged in a one-to-one correspondence manner, the second fan component is used for carrying out negative pressure suction, and the third fan component further strengthens the fine particle screening effect. The fuel coal sorting device disclosed by the invention converts a large-treatment-capacity thick-material-layer air screen into a plurality of thin-material-layer air screens, performs three functions of pre-screening, main screening and enhanced screening, does not have a transferring operation in the middle, does not compact materials again, is high in screening efficiency, and has important significance in improving the utilization efficiency of sintered fuel coal and reducing energy consumption.
Description
1 Technical field
The invention relates to the technical field of bulk powder sorting, in particular to a fuel coal sorting device and a screening control method.
2 Background art
Fuel coal is one of main raw materials in the steel sintering process and is also a main source of carbon emission in the ferrous metallurgy industry, and the too coarse and the too fine particle sizes of the fuel coal can have great influence on the utilization efficiency of fuel and the performance parameters of sintered ores, so that the particle sizes of the fuel are generally required to be controlled within the range of 0.5-3 mm in the sintering process.
However, the existing one-section or two-section fuel crushing flow lacks a fine particle sorting device, the lower limit of the fuel is difficult to accurately control, the fraction ratio of the solid fuel which is sent to the sintering batching room after being crushed by four rollers and is smaller than 0.5mm can reach more than 30%, and the sintering production energy consumption is high.
Therefore, developing a fuel coal sorting device and a fuel coal sorting control method improves the fuel coal sorting efficiency, and has important significance for improving the utilization efficiency of sintered fuel coal and reducing energy consumption.
3 Summary of the invention
The fuel coal sorting device provided by the invention solves the technical problem that the existing fuel screening device has poor screening efficiency when screening the water-containing sintered solid fuel.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the fuel coal sorting device comprises a dispersion guide tower, a cyclone separator, a discharging valve, a first fan component and a second fan component, wherein the cyclone separator is positioned at the bottom output side of the dispersion guide tower, the discharging valve is positioned at the bottom outlet position of the cyclone separator, a material passing cavity is arranged in the dispersion guide tower, a material feeding port and a diversion discharging port which are communicated with the hollow material passing cavity are arranged on the dispersion guide tower, the material feeding port is positioned at the top of the dispersion guide tower, the diversion discharging port is positioned at the bottom of the dispersion guide tower, a plurality of diversion discharging ports are sequentially arranged along the circumferential direction of the dispersion guide tower, the first fan component is used for blowing air into the hollow material passing cavity to blow materials flowing through the diversion discharging ports, the cyclone separator is arranged in one-to-one correspondence with the diversion discharging ports, the discharging valve is arranged in one-to-one correspondence with the cyclone separator, the cyclone separator is used for receiving the discharged materials of the corresponding split discharge port and performing cyclone separation, the second fan assembly is used for sucking negative pressure from the top of the cyclone separator to suck the light materials in the cyclone separator out of the cyclone separator, the blanking valve is used for controlling the discharge of the heavy materials from the bottom of the cyclone separator, the cyclone separator further comprises a third fan assembly, the third fan assembly comprises an air supply inner ring, an air supply outer ring and tangential air supply pipes, the tangential air supply pipes are arranged in one-to-one correspondence with the cyclone separator, the tangential air supply pipes comprise first air supply pipelines arranged in the air supply inner ring and the corresponding cyclone separator and second air supply pipelines arranged in the air supply outer ring and the corresponding cyclone separator, the first air supply pipelines are communicated with the cyclone separator along the tangential direction of the cyclone separator, and the second air supply pipelines are communicated with the cyclone separator along the tangential direction of the cyclone separator.
Further, the dispersion guide tower includes the tower body and the hollow guide cone that coaxial laid, the tower body has the cavity and crosses the material cavity, the epaxial material feed inlet that is equipped with in top of tower body, the bottom of tower body is provided with the reposition of redundant personnel discharge gate, the axis setting of reposition of redundant personnel discharge gate skew tower body, a plurality of reposition of redundant personnel discharge gates are arranged in proper order along the circumference of tower body, hollow guide cone locates in the tower body and be in between material feed inlet and the reposition of redundant personnel discharge gate, hollow guide cone has the induced air cavity, hollow guide cone's guide lateral wall face is arranged from the direction downward sloping of middle part towards outside, be arranged on hollow guide cone's the guide lateral wall face with the blowing mouth of induced air cavity intercommunication.
Further, the tower body comprises an outer sleeve and an inner sleeve which are coaxially arranged, the inner sleeve and the hollow guide cone are arranged in the outer sleeve, a radial gap is reserved between the inner sleeve and the inner wall surface of the outer sleeve so as to form a guide discharging space, a plurality of separation plates are circumferentially arranged in the guide discharging space at intervals so as to divide the guide discharging space into a plurality of diversion discharge ports, the hollow guide cone is arranged at the top of the inner sleeve, a radial gap is reserved between the hollow guide cone and the inner wall surface of the outer sleeve so as to form a winnowing guide space, and the first fan assembly is used for supplying air to the air guiding cavity from the bottom center shaft position of the hollow guide cone.
Further, the outer sleeve comprises a straight barrel section and a tapered cone barrel section which are spliced along the axial direction, the tapered cone barrel section is positioned at the lower part of the straight barrel section, the tapered cone barrel section is gradually contracted along the direction of the top towards the bottom, the inner sleeve is a round platform barrel body which is gradually contracted along the direction of the top towards the bottom, the inner sleeve is arranged on the top surface of the tapered cone barrel section, and the cyclone separator is arranged at the bottoms of the tapered cone barrel section and the inner sleeve.
Further, the inclination of the tapered cone section is smaller than the inclination of the inner sleeve.
Further, the first fan assembly comprises an air supply fan and an air supply pipe, the air supply pipe and the inner sleeve are coaxially arranged, the air supply pipe is arranged at the bottom of the inner sleeve, and the air supply fan is used for supplying air into the air supply pipe.
Further, the second fan assembly comprises an exhaust branch pipe, an exhaust manifold and a negative pressure exhaust mechanism, the exhaust branch pipes are arranged in one-to-one correspondence with the cyclone separators, the exhaust branch pipes are coaxially arranged with the corresponding cyclone separators and extend into the cyclone separators from the tops of the cyclone separators, the suction ends of the exhaust branch pipes are communicated with the cyclone separators, the exhaust ends of the exhaust branch pipes are communicated with the first end of the exhaust manifold, and the negative pressure exhaust mechanism is communicated with the second end of the exhaust manifold.
Further, the cyclone separator comprises a cyclone cylinder and a tangential guide structure, wherein the tangential guide structure is arranged in the cyclone cylinder and is positioned at the top of the cyclone cylinder and used for guiding materials to separate along tangential movement at the top of the cyclone cylinder.
Further, the fuel coal sorting device further comprises a material distribution guide pipe, a material distribution adjusting plate and a lifting adjusting and positioning mechanism, wherein the material distribution pipe penetrates through the material feeding hole to extend into the tower body and is arranged towards the hollow material guide cone, the material distribution adjusting plate is movably arranged on the material distribution guide pipe along the axial direction, a discharging gap is formed between the material distribution guide pipe and the hollow material guide cone, the first end of the lifting adjusting and positioning mechanism is arranged on the tower body, the second end of the lifting adjusting and positioning mechanism is connected with the material distribution adjusting plate, and the lifting adjusting and positioning mechanism is used for driving the material distribution adjusting plate to axially move and position so as to adjust the size of the discharging gap.
Further, the fuel coal sorting device further comprises a discharge chute and a conveying belt, the conveying belt is positioned below the dispersion guide tower, the discharge chute and the blanking valve are arranged in one-to-one correspondence, the input end of the discharge chute is connected with the blanking valve, and the second end of the discharge chute is downwards arranged towards the conveying belt.
The invention also provides a fuel coal screening control method, which comprises the following steps:
Acquiring the corresponding pressure of an exhaust branch pipe of a separation chamber of each cyclone separator in real time; obtaining an average pressure value; if the current pressure of each exhaust branch pipe is consistent with the average pressure value, the normal operation is carried out; if the pressure corresponding to the exhaust branch pipe is smaller than the average pressure value, adjusting the secondary air volume of the separation chamber corresponding to the exhaust branch pipe until the current pressure of the separation chamber is consistent with the average pressure value; judging whether the secondary air supply quantity of the tangential air supply pipe corresponding to the separation chamber is between the minimum secondary air supply quantity and the maximum air supply quantity; if the secondary air supply quantity of the tangential air supply pipe corresponding to the separation chamber is between the minimum secondary air supply quantity and the maximum air supply quantity, the normal operation is carried out; and if the secondary air supply quantity of the tangential air supply pipe corresponding to the separation chamber is not between the minimum secondary air supply quantity and the maximum air supply quantity, adjusting the height of the cloth adjusting plate corresponding to the separation chamber so as to adjust the opening degree of the corresponding cloth opening until the pressure corresponding to the exhaust branch pipe is consistent with the average pressure value, and the secondary air supply quantity of the tangential air supply pipe corresponding to the separation chamber is between the minimum secondary air supply quantity and the maximum air supply quantity.
The invention has the following beneficial effects:
The invention relates to a fuel coal sorting device and a fuel coal screening control method, comprising a dispersion guide tower, cyclone separators, a blanking valve, a first fan assembly, a second fan assembly and a third fan assembly, wherein a plurality of flow dividing discharge holes are sequentially arranged along the circumferential direction of the dispersion guide tower, the cyclone separators are arranged in one-to-one correspondence with the flow dividing discharge holes, the blanking valve is arranged in one-to-one correspondence with the cyclone separators, the third fan assembly is arranged at the bottom of the cyclone separators and above the blanking valve, when water-containing sintered solid fuel is screened, the material is fed into the dispersion guide tower through a material feed port, the material before entering the flow dividing discharge holes is blown away by blowing air into a hollow material passing cavity through the first fan assembly, and the dispersed material enters the corresponding cyclone separators by virtue of inertial force such as wind force, gravity and the like after entering each flow dividing discharge hole; the cyclone separator screens the materials into a bottom heavy material and a top light material, the bottom heavy material is discharged outside the cyclone separator after a blanking valve is opened, and the top light material is discharged outside the cyclone separator under the renting of the second fan assembly; the method comprises the steps that a plurality of cyclone separators are directly and integrally arranged below a dispersing and guiding tower, dispersed materials enter the corresponding cyclone separators through inertial force such as wind force, gravity and the like after entering each split discharge hole, large-treatment-capacity thick material layer wind sieves are converted into a plurality of thin material layer wind sieves, the pre-screened materials are not compacted again, in addition, a first fan assembly is used for supplying air into a hollow material passing cavity, a second fan assembly is used for carrying out negative pressure suction from the top of the cyclone separators, a third fan assembly further strengthens the fine particle screening effect, large-treatment-capacity thick material layer wind sieves are converted into a plurality of thin material layer wind sieves, the pre-screening of the first fan assembly, the main screening of the second fan assembly and the strengthening screening of the third fan assembly are carried out for three times, and the transferring operation does not exist in the middle, so that the materials are not compacted again.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Description of the drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. At the position of
In the accompanying drawings:
FIG. 1 is one of schematic structural views of a fuel coal sorting apparatus in one embodiment of the present invention;
FIG. 2 is a second schematic diagram of a fuel coal sorting apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view illustrating the cooperation of the material guiding pipe, the material adjusting plate and the material guiding pipe in FIG. 1;
fig. 4 is a cross-sectional view at A-A in fig. 1.
Legend description:
100. A fuel coal sorting device; 10. a dispersion guide tower; 101. a hollow passing chamber; 102. a material feed port; 103. a split discharge port; 104. a discharge gap; 11. a tower body; 111. an outer sleeve; 112. an inner sleeve; 12. a hollow guide cone; 121. an induced draft chamber; 13. a cloth material guide pipe; 14. lifting adjusting and positioning mechanism; 15. a cloth adjusting plate; 20. a cyclone separator; 21. a rotary separating cylinder; 22. cutting the guide structure; 30. a blanking valve; 40. a first fan assembly; 41. an air supply pipe; 50. a second fan assembly; 51. an exhaust branch pipe; 52. an exhaust manifold; 53. a negative pressure air draft mechanism; 60. a third fan assembly; 61. an air supply inner ring; 62. an air supply outer ring; 63. tangential air supply pipes; 631. a first air supply duct; 632. a second air supply duct; 70. a discharge chute; 80. and a conveyor belt.
5 Detailed description of the preferred embodiments
It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The inventor finds that the existing one-section or two-section fuel crushing flow lacks a fine particle sorting device, and the lower limit of the fuel is difficult to precisely control, so that the fraction ratio of the solid fuel which is crushed by four rollers and is less than 0.5mm and sent to a sintering batching chamber can reach more than 30%; meanwhile, the existing sorting devices on the market are difficult to meet the requirements of sorting the sintering fuel with the particle size of +/-0.5 mm under the influence of the requirements of the sintering production process and the fuel performance, and the main reason is that on one hand, the sintering solid fuel has high water content, generally 7-10%, and the special condition can reach 13% or even 15%; the size fraction difference is small, and the whole size fraction distribution is within the range of 0-5 mm; the yield is large, the consumption of solid fuel of a 360 square meter sintering machine is about 25t/h, and the like, so that the existing screening device is very easy to block the screen holes in the running process, and the screening efficiency is less than 50%.
As shown in fig. 1,2,3 and 4, the invention provides a fuel coal sorting device 100, which comprises a dispersion guide tower 10, a cyclone separator 20, a blanking valve 30, a first fan assembly 40, a second fan assembly 50 and a third fan assembly 60, wherein the cyclone separator 20 is positioned at the bottom output side of the dispersion guide tower 10, the blanking valve 30 is positioned at the bottom outlet position of the cyclone separator 20, the dispersion guide tower 10 is provided with a hollow passing cavity 101, a material feed port 102 and a split discharge port 103 which are communicated with the hollow passing cavity 101 are arranged on the dispersion guide tower 10, the material feed port 102 is positioned at the top of the dispersion guide tower 10, the split discharge port 103 is positioned at the bottom of the dispersion guide tower 10, a plurality of split discharge ports 103 are sequentially arranged along the circumferential direction of the dispersion guide tower 10, the first fan assembly 40 is used for blowing the material flowing through the split discharge port 103 into the hollow passing cavity 101, the cyclone separators 20 are arranged in one-to-one correspondence with the cyclone separators 20, the blanking valves 30 are arranged in one-to-one correspondence with the cyclone separators 20, the cyclone separators 20 are used for receiving the materials discharged by the corresponding cyclone separators 103 and performing cyclone separation, the second fan assembly 50 is used for pumping light materials out of the cyclone separators 20 by negative pressure suction from the tops of the cyclone separators 20, the blanking valves 30 control the discharge of heavy materials from the bottoms of the cyclone separators 20, the third fan assembly 60 comprises an air supply inner ring 61, an air supply outer ring 62 and tangential air supply pipes 63, the tangential air supply pipes 63 are arranged in one-to-one correspondence with the cyclone separators 20, the tangential air supply pipes 63 comprise a first air supply pipe 41 arranged in the air supply inner ring 61 and the corresponding cyclone separators 20, a second air supply pipe 41 arranged in the air supply outer ring 62 and the corresponding cyclone separators 20, the first air supply duct 41 communicates with the cyclone separator 20 in the tangential direction of the cyclone separator 20, and the second air supply duct 41 communicates with the cyclone separator 20 in the tangential direction of the cyclone separator 20.
The invention provides a fuel coal sorting device 100, which comprises a dispersion guide tower 10, a cyclone separator 20, a blanking valve 30, a first fan assembly 40, a second fan assembly 50 and a third fan assembly 60, wherein a plurality of flow dividing discharge ports 103 are sequentially arranged along the circumferential direction of the dispersion guide tower 10, the cyclone separator 20 and the flow dividing discharge ports 103 are arranged in one-to-one correspondence, the blanking valve 30 and the cyclone separator 20 are arranged in one-to-one correspondence, the third fan assembly 60 is arranged at the bottom of the cyclone separator 20 and above the blanking valve 30, when water-containing sintered solid fuel is screened, materials are fed into the dispersion guide tower 10 through a material feed port 102, the materials before entering the flow dividing discharge ports 103 are blown into a hollow overfeeding cavity 101 through the first fan assembly 40, and the dispersed materials enter the corresponding cyclone separator 20 by virtue of inertial forces such as wind force, gravity and the like after entering the flow dividing discharge ports 103; the cyclone separator 20 screens the material into a bottom heavy material and a top light material, the bottom heavy material is discharged outside the cyclone separator 20 after the blanking valve 30 is opened, and the top light material is discharged outside the cyclone separator 20 under the renting of the second fan assembly 50; the multiple cyclone separators 20 are directly and integrally arranged below the dispersing guide tower 10, dispersed materials enter the corresponding cyclone separators 20 by means of inertial force such as wind force and gravity after entering each split discharge hole 103, and the large-treatment-capacity thick-material-layer wind screen is converted into multiple thin-material-layer wind screens without compacting the pre-screened materials again.
It can be appreciated that in the present invention, the number of the split discharge ports 103 may be two, or may be three, four, five, or six, or other numbers; in order to facilitate further improving the screening efficiency, the plurality of split discharge ports 103 are uniformly arranged in the circumferential direction. It will be appreciated that the cyclone 20 is arranged directly below the dispersion guide tower 10, the junction of the cyclone 20 with the dispersion guide tower 10 having a transition section that transitions the body of the cyclone 20 to a circular shape.
Further, in order to be convenient for fully dispersing the material before flowing into the diversion discharge hole 103, the dispersion guide tower 10 comprises a tower body 11 and a hollow guide cone 12 which are coaxially arranged, the tower body 11 is provided with a hollow material passing cavity 101, a material feeding hole 102 is arranged on the top center shaft of the tower body 11, the diversion discharge hole 103 is arranged at the bottom of the tower body 11, the diversion discharge hole 103 is deviated from the central axis of the tower body 11, a plurality of diversion discharge holes 103 are sequentially distributed along the circumferential direction of the tower body 11, the hollow guide cone 12 is arranged in the tower body 11 and is positioned between the material feeding hole 102 and the diversion discharge hole 103, the hollow guide cone 12 is provided with an induced air cavity 121, the guide side wall surface of the hollow guide cone 12 is downwards inclined from the middle to the outer direction, a blowing hole communicated with the induced air cavity 121 is arranged on the guide side wall surface of the hollow guide cone 12, and the first fan assembly 40 is used for blowing air into the induced air cavity 121.
It will be appreciated that the hollow guide cone 12 may be a hollow cone or a hollow frustum; the guide side wall surface of the hollow guide cone 12 is provided with a guide groove corresponding to the diversion discharge hole 103.
Further, the tower body 11 includes an outer sleeve 111 and an inner sleeve 112 which are coaxially arranged, the inner sleeve 112 and the hollow guide cone 12 are both arranged in the outer sleeve 111, a radial gap is reserved between the inner sleeve 112 and the inner wall surface of the outer sleeve 111 so as to form a guide discharging space, a plurality of partition plates are circumferentially arranged in the guide discharging space at intervals so as to divide the guide discharging space into a plurality of diversion discharge ports 103, the hollow guide cone 12 is arranged at the top of the inner sleeve 112, a radial gap is reserved between the hollow guide cone 12 and the inner wall surface of the outer sleeve 111 so as to form a winnowing guide space, and the first fan assembly 40 is used for blowing air from the bottom of the hollow guide cone 12 into the air guiding cavity 121.
It will be appreciated that the inner sleeve 112 is disposed within the outer sleeve 111 with the bottom surface disposed flush with the outer sleeve 111, thereby facilitating installation of the cyclonic separator 20.
Further, the outer sleeve 111 includes a straight section and a tapered cone section spliced along an axial direction, the tapered cone section is located at a lower portion of the straight section, the tapered cone section is gradually contracted along a direction from top to bottom, the inner sleeve 112 is a truncated cone body gradually contracted along a direction from top to bottom, the inner sleeve 112 is disposed on a top surface of the tapered cone section, and the cyclone separator 20 is disposed between the tapered cone section and the inner sleeve 112. It can be appreciated that, by setting the tapered cone section, the inner sleeve 112 is a cone cylinder body gradually shrinking along the direction of the top towards the bottom, and the air blowing mode, the tapered cone section and the lower part of the cone cylinder body are matched modes of shrinkage structures, so that large particles in the materials blown and led out by the hollow guide cone 12 (the guide side wall) collide with the tapered cone section to further crush the large particle materials, and meanwhile, the materials of the diversion outlet 103 are not blocked, and the flow rate of the materials discharged to the cyclone separator 20 is not reduced.
Further, to increase the flow rate of material entering the cyclone separator 20, the inclination of the tapered cone section is less than the inclination of the inner sleeve 112 to enhance screening efficiency. It will be appreciated that the apertures of the split ports 103 are progressively convergent in the material flow direction.
Alternatively, the material guiding side wall surface of the hollow material guiding cone 12 is a shutter structure or an orifice plate structure.
Further, the first fan assembly 40 includes an air supply fan and an air supply pipe 41, the air supply pipe 41 is coaxially arranged with the inner sleeve 112, the air supply pipe 41 is arranged at the bottom of the inner sleeve 112, and the air supply fan is used for supplying air into the air supply pipe 41.
It will be appreciated that the suction side of the second fan assembly 50 extends into the cyclone separator 20 from a top central axis location of the cyclone separator 20, and the discharge side of the second fan assembly 50 extends out of the cyclone separator 20, the second fan assembly 50 being adapted for negative pressure suction from the top of the cyclone separator 20. In a specific embodiment of the present invention, the second fan assembly 50 includes an exhaust branch pipe 51, an exhaust manifold 52 and a negative pressure air suction mechanism 53, where the exhaust branch pipe 51 is arranged in a one-to-one correspondence with the cyclone separators 20, the exhaust branch pipe 51 is coaxially arranged with the corresponding cyclone separator 20 and extends into the cyclone separator 20 from the top of the cyclone separator 20, the suction end of the exhaust branch pipe 51 is disposed in communication with the cyclone separator 20, the air outlet end of the exhaust branch pipe 51 is connected to the exhaust manifold 52, and the negative pressure air suction mechanism 53 is used for exhausting air to the exhaust manifold 52.
More preferably, the negative pressure suction mechanism 53 includes a settling chamber downstream of the exhaust manifold 52, a dust collector downstream of the settling chamber, and a suction fan for suction.
Further, the cyclone separator 20 comprises a cyclone barrel 21 and a tangential guide structure 22, wherein the tangential guide structure is arranged in the cyclone barrel 21 and is positioned at the top of the cyclone barrel 21 for guiding materials to move tangentially in the cyclone barrel. In the invention, a spiral cyclone is adopted in the tangential material guiding structure 22, the spiral cyclone is arranged at the head of the cyclone barrel 21, the outer wall surface of the spiral cyclone is in sealing connection with the cyclone barrel 21, the inner wall surface of the spiral cyclone is in sealing connection with the exhaust branch pipe 51, and the cyclone barrel 21, the spiral cyclone and the exhaust branch pipe 51 are tightly enclosed to form a cyclone flow guiding cavity.
It can be appreciated that in the present invention, the tangential air supply mechanism is disposed near the bottom outlet of the cyclone barrel by the third fan assembly 60 for supplying air from the tangential cyclone barrel of the cyclone barrel 21, and the tangential secondary air flow is added in the cyclone barrel 21 to form a vortex turning direction same as the direction of the spiral cyclone, so that the combination of the two components improves the vortex strength and the separation effect, and further ensures the optimal effect of the secondary air flow. In the invention, a group of third fan assemblies 60 are arranged to perform vortex blowing on all cyclone separators 20, a group of second fan assemblies 50 are arranged to perform top adsorption discharging on all cyclone separators 20, and pressure gauges and regulating valves are arranged on the exhaust branch pipe 51, the first air supply pipe 41 and the second air supply pipe 41, so that the working condition of each cyclone separator 20 can be independently regulated to adapt to the self capacity to screen, the structural design is reasonable, and the efficiency of screening to obtain materials in the range of 0.5-3 mm is high.
More preferably, the first air supply duct 41 and the second air supply duct 41 are arranged in parallel.
Further, the fuel coal sorting device 100 further includes a material distribution guiding pipe 13, a material distribution adjusting plate 15 and a lifting adjusting and positioning mechanism 14, the material distribution pipe penetrates through the material feeding hole 102, stretches into the tower 11 and is arranged towards the hollow material guiding cone 12, the material distribution adjusting plate 15 is movably arranged on the material distribution guiding pipe 13 along the axial direction, a material discharging gap 104 is formed between the material distribution guiding pipe 13 and the hollow material guiding cone 12, a first end of the lifting adjusting and positioning mechanism 14 is arranged on the tower 11, a second end of the lifting adjusting and positioning mechanism 14 is connected with the material distribution adjusting plate 15, and the lifting adjusting and positioning mechanism 14 is used for driving the material distribution adjusting plate 15 to move along the axial direction and position so as to adjust the size of the material discharging gap 104. It can be understood that, in the present invention, in order to facilitate adjustment of the feeding amount of each split discharge hole 103, the number of the cloth adjusting plates 15 is the same as that of the cyclone separators 20, the cloth adjusting plates 15, the cyclone separators 20 and the lifting adjusting positioning mechanisms 14 are correspondingly arranged one by one, the cloth guide pipes 13 are regular polygons, the number of the side wall surfaces of the cloth guide pipes 13 is the same as that of the cyclone separators 20, and the height of the corresponding cloth adjusting plates 15 is adjusted by the lifting adjusting positioning mechanisms 14 to finally adjust the amount of the material entering the corresponding cyclone separators 20. Alternatively, the elevation adjustment positioning mechanism 14 employs a hoisting mechanism or a hydraulic telescopic positioning mechanism.
Further, the dispersion guide tower 10 further comprises a discharge chute 70 and a conveying belt 80, the conveying belt 80 is located below the dispersion guide tower 10, the discharge chute 70 and the discharge valve 30 are arranged in one-to-one correspondence, an input end of the discharge chute 70 is connected with the discharge valve 30, and a second end of the discharge chute 70 is downwards arranged towards the feeding cloth bag.
Further, the first fan assembly 40 further includes a control valve for controlling the amount of air; the second fan assembly 50 further includes a control valve for controlling the amount of air of the exhaust branch pipe 51; the third fan assembly 60 further includes a control valve for controlling the air volume of the first air supply duct 41 and a control valve for controlling the air volume of the second air supply duct 41. In the present invention, in order to ensure the sealing property during discharging, the discharging valve 30 is a star-shaped rotary valve.
Further, in order to prevent the uneven air flow in each separation chamber from reducing the separation effect, a pressure gauge and a regulating valve are installed on the exhaust branch pipe 51, the first air supply pipe 41 and the second air supply pipe 41 of the separation chamber of each cyclone separator 20, and the pipe pressure is monitored in real time.
The fuel coal sorting device 100 provided by the invention is provided with a plurality of parallel cyclone separators 20, the dispersion material guiding towers 10 are correspondingly and uniformly provided with the same number of diversion material outlets 103, the opening degree of a material discharging gap 104 is controlled by the height of a material distributing and guiding pipe 13, the height adjustment of the material distributing and guiding pipe 13 is controlled by a lifting adjustment positioning mechanism 14, and the lifting adjustment positioning mechanism can be adjusted in real time according to the winnowing effect; the hollow guide cone 12 is arranged positively, and the side wall of the air inlet section is of a shutter structure or an orifice plate structure, and comprises a wear-resistant protection cover plate and an air inlet shutter.
In the material screening process, fuel coal is filled in the material distributing and guiding pipe 13 at a certain height, flows out through the material discharging gap 104 and enters the separation chamber of the corresponding cyclone separator 20 after being separated, air passes through the louver through the air inducing chamber 121 to fluidize the fuel coal, and then directly enters the spiral cyclone after being changed into a gas-solid mixture, so that the tangential and vertical speeds are obtained, and the disordered movement of the fuel coal is converted into the spiral movement, so that the fuel coal spirally descends along the wall of the separation chamber. The gas-solid mixture produces centrifugal force in the spiral descending process, the larger the particle size of the particles is, the larger the centrifugal force is, when the centrifugal force of the particles is larger than the airflow resistance, the particles move towards the inner wall of the separation chamber, on one hand, the particles collide with the wall surface to separate the particles with the same size, the accuracy of detection data is improved, on the other hand, once the particles contact with the wall surface, the particles lose inertia force and slide downwards along the wall surface under the drive of gravity and rotating fluid, and finally are discharged through the star-shaped rotary valve and fall into the conveying belt 80 from the discharge chute 70 to be sent to the fuel coal mine bin. In order to further improve the sorting effect of small particles, tangential secondary air flow is added at the lower cone end of the separation chamber to form vortex turning in the same direction as that of the spiral cyclone, the vortex turning and the separation effect are combined to improve the vortex strength and the separation effect, the optimal effect of the secondary air flow is further ensured, a flowmeter and a regulating valve are respectively arranged at the first air supply pipe 41 and the first air supply pipe 41, the numerical value of the flowmeter is detected in real time, and the equal outlet flow is ensured. Furthermore, the separation effect can be improved by adjusting the size of tangential secondary air flow, wherein the minimum secondary air flow is qmin, and the maximum secondary air flow is qmax. The secondary air flow is provided by an air supply inner ring 61 and an air supply outer ring 62, the final air flow enters the exhaust manifold 52 through the exhaust branch pipe 51 under the action of a fan, fine particles are settled after passing through the settling chamber and are discharged from the bottom, and the separation of fuel coal is realized.
The invention also provides a fuel coal sorting device 100 and a fuel coal screening control method, comprising the steps of acquiring the corresponding pressure of the exhaust branch pipe 51 of the separation chamber of each cyclone separator 20 in real time; obtaining an average pressure value; if the current pressure of each exhaust branch pipe 51 is identical to the average pressure value, normal operation is performed; if the pressure corresponding to the exhaust branch pipe 51 is smaller than the average pressure value, adjusting the secondary air volume of the separation chamber corresponding to the exhaust branch pipe 51 until the current pressure of the separation chamber is consistent with the average pressure value; judging whether the secondary air supply quantity of the tangential air supply pipe 63 corresponding to the separation chamber is between the minimum secondary air supply quantity and the maximum air supply quantity; if the secondary air supply quantity of the tangential air supply pipe 63 corresponding to the separation chamber is between the minimum secondary air supply quantity and the maximum air supply quantity, the normal operation is performed; if the secondary air supply volume of the tangential air supply pipe 63 corresponding to the separation chamber is not between the minimum secondary air supply volume and the maximum air supply volume, the height of the cloth adjusting plate 15 corresponding to the separation chamber is adjusted to adjust the opening of the corresponding cloth port until the pressure corresponding to the exhaust branch pipe 51 is consistent with the average pressure value, and the secondary air supply volume of the tangential air supply pipe 63 corresponding to the separation chamber is between the minimum secondary air supply volume and the maximum air supply volume.
Specifically, the first step: corresponding pressures Q1, Q2, … and Qi of the exhaust branch pipes of the separation chambers of the cyclone separators are obtained in real time;
And a second step of: judging whether the pressures Q1, Q2, … and Qi of the separation chambers are equal, and if Q1 = Q2 = … = Qi, the device works normally; if there are different pressure separating chambers, the average value of the pressure of each separating chamber is obtained (Average pressure value), wherein/>Indicating the number of separation chambers;
and a third step of: judging the relation between the current pressure value Qi of the separation chamber and the average pressure, and if the current pressure of the separation chamber is consistent with the average pressure, not adjusting the pressure of the tangential air supply pipe corresponding to the separation chamber;
Fourth step: if it is (The pressure value Qi of the separation chamber is larger than the average pressure), the secondary air regulating valve on the tangential air supply pipe of the separation chamber i is regulated, and the secondary air quantity is reduced until the current pressure of the separation chamber is consistent with the average pressure. Judging the relation between the secondary air flow qi of the corresponding tangential air supply pipe and the minimum secondary air flow qmin, and if q i＞qmin, finishing the air quantity adjusting operation of the separation chamber i; if q i＞qmin, increasing the opening of the separation chamber i corresponding to the cloth opening, increasing the material layer thickness delta, reducing the air quantity entering the separation chamber i by the main air supply device, and returning to the third step for circulation adjustment until/>And q i＞qmin. .
Fifth step: if it is(The pressure value Qi of the separation chamber is smaller than the average pressure), regulating a secondary air regulating valve on a tangential air supply pipe of the separation chamber i, and increasing the secondary air volume until/>At this time, judging the relation between the secondary air flow qi of the corresponding tangential air supply pipe and the maximum secondary air flow qmax, if q i＜qmax, completing the air quantity regulation operation of the separation chamber i, if q i＞qmax, reducing the opening of the separation chamber i corresponding to the cloth opening, reducing the material layer thickness delta, thereby increasing the air quantity of the main air supply device (the first fan assembly) entering the separation chamber i, and returning to the third step of circulation regulation until/>And q i＜qmax.
Furthermore, on the basis of uniform screening, a high-efficiency high-quality screening control method is provided, which comprises the following specific steps:
The first step: detecting and obtaining the mass ratio of particles larger than 0.5mm in the sedimentation chamber and the mass ratio of particles smaller than 0.5mm on the conveying belt.
And a second step of: when the mass ratio of particles larger than 0.5mm in the sedimentation chamber is larger than the critical value of the process requirement, increasing the flow q of the secondary air of the tangential air supply pipe synchronously, and improving the separation effect until the requirement is met; if q is smaller than q max, the operation is finished, if q is larger than q max, the opening of the corresponding material distribution opening of each separation chamber is reduced, the material layer thickness delta is reduced, the air quantity of the main air supply device entering the separation chamber is increased, and at the moment, the first step of circulating adjustment is returned until the mass ratio of particles larger than 0.5mm in the sedimentation chamber 15 meets the process requirement.
And a third step of: when the mass ratio of particles smaller than 0.5mm on the conveying belt is larger than a critical value required by the process, increasing the flow q of the secondary air of the tangential air supply pipe synchronously, and improving the separation effect until the requirements are met; if q is smaller than q max, the operation is finished, if q is larger than q max, the opening of each separation chamber corresponding to the cloth opening is reduced, the thickness delta of the material layer is reduced, the air quantity of the main air supply device entering the separation chamber is increased, and at the moment, the first step of circulating adjustment is returned until the mass ratio of particles smaller than 0.5mm on the conveying belt meets the process requirement.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fuel coal sorting device is characterized in that,
Comprises a dispersion guide tower, a cyclone separator, a blanking valve, a first fan assembly, a second fan assembly and a third fan assembly, wherein the cyclone separator is positioned at the bottom output side of the dispersion guide tower, the blanking valve is positioned at the bottom outlet position of the cyclone separator,
The dispersing and guiding tower is provided with a hollow material passing cavity, a material feeding hole and a diversion discharging hole which are communicated with the hollow material passing cavity are arranged on the dispersing and guiding tower, the material feeding hole is positioned at the top of the dispersing and guiding tower, the diversion discharging hole is positioned at the bottom of the dispersing and guiding tower, a plurality of diversion discharging holes are sequentially arranged along the circumferential direction of the dispersing and guiding tower,
The first fan component is used for blowing air into the hollow material passing cavity to blow away the material flowing through the diversion discharge port from the material feed port,
The cyclone separators are arranged in one-to-one correspondence with the flow-dividing discharge holes, the discharging valves are arranged in one-to-one correspondence with the cyclone separators, the cyclone separators are used for receiving the materials discharged by the corresponding flow-dividing discharge holes and performing cyclone separation,
The second fan assembly is used for carrying out negative pressure suction from the top of the cyclone separator to pump light materials in the cyclone separator out of the cyclone separator, the blanking valve is used for controlling the discharge of heavy materials from the bottom of the cyclone separator,
The third fan assembly comprises an air supply inner ring, an air supply outer ring and tangential air supply pipes, wherein the tangential air supply pipes are arranged in one-to-one correspondence with the cyclone separators, the tangential air supply pipes comprise first air supply pipelines arranged on the air supply inner ring and the cyclone separators and second air supply pipelines arranged on the air supply outer ring and the cyclone separators, the first air supply pipelines are communicated with the cyclone separators along the tangential direction of the cyclone separators, and the second air supply pipelines are communicated with the cyclone separators along the tangential direction of the cyclone separators.
2. The fuel coal separation device according to claim 1, wherein,
The dispersion guide tower comprises a tower body and a hollow guide cone which are coaxially arranged, the tower body is provided with a hollow material passing cavity, the top of the tower body is axially provided with a material feeding port, the bottom of the tower body is provided with a diversion discharging port, the diversion discharging port deviates from the central axis of the tower body, a plurality of diversion discharging ports are sequentially arranged along the circumferential direction of the tower body,
The hollow guide cone is arranged in the tower body and is positioned between the material feeding hole and the diversion discharging hole, the hollow guide cone is provided with an induced air cavity, the guide side wall surface of the hollow guide cone is arranged in a downward inclined mode from the middle to the outer direction, and the guide side wall surface of the hollow guide cone is provided with an air blowing opening communicated with the induced air cavity.
3. The fuel coal separation device according to claim 2, wherein,
The tower body comprises an outer sleeve and an inner sleeve which are coaxially arranged, the inner sleeve and the hollow guide cone are both arranged in the outer sleeve,
A radial gap is reserved between the inner wall surfaces of the inner sleeve and the outer sleeve so as to form a material guiding and discharging space, a plurality of partition plates are circumferentially arranged in the material guiding and discharging space at intervals so as to divide the material guiding and discharging space into a plurality of diversion discharge holes,
The hollow guide cone is arranged at the top of the inner sleeve, a radial gap is reserved between the hollow guide cone and the inner wall surface of the outer sleeve so as to form a winnowing guide space,
The first fan assembly is used for supplying air into the induced air cavity from the bottom center shaft position of the hollow guide cone.
4. The fuel coal separation device according to claim 3, wherein,
The outer sleeve comprises a straight cylinder section and a tapered cone section which are spliced along the axial direction, the tapered cone section is positioned at the lower part of the straight cylinder section, the tapered cone section is gradually contracted along the direction of the top to the bottom, the inner sleeve is a round table cylinder body gradually contracted along the direction of the top to the bottom, the inner sleeve is arranged on the top surface of the tapered cone section,
The cyclone separator is arranged at the bottoms of the tapered cone section and the inner sleeve.
5. The fuel coal separation device according to claim 2, wherein,
The first fan assembly comprises an air supply fan and an air supply pipe, the air supply pipe and the inner sleeve are coaxially arranged, the air supply pipe is arranged at the bottom of the inner sleeve, and the air supply fan is used for supplying air into the air supply pipe.
6. The fuel coal separation device according to any one of claims 1 to 5, wherein,
The second fan assembly comprises exhaust branch pipes, an exhaust manifold and a negative pressure exhaust mechanism, wherein the exhaust branch pipes are arranged in one-to-one correspondence with the cyclone separators, the exhaust branch pipes are coaxially arranged with the cyclone separators and extend into the cyclone separators from the tops of the cyclone separators, the suction ends of the exhaust branch pipes are communicated with the cyclone separators, the exhaust ends of the exhaust branch pipes are communicated to the first end of the exhaust manifold, and the negative pressure exhaust mechanism is communicated with the second end of the exhaust manifold.
7. The fuel coal separation device according to any one of claims 1 to 5, wherein,
The cyclone separator comprises a cyclone barrel and a tangential guide mechanism, and the tangential guide mechanism is arranged in the cyclone barrel and is positioned at the top of the cyclone barrel and used for guiding materials to separate along tangential movement at the top of the cyclone barrel.
8. The fuel coal separation device according to any one of claims 1 to 5, wherein,
The fuel coal sorting device also comprises a material distributing and guiding pipe, a material distributing and adjusting plate and a lifting and adjusting positioning mechanism, wherein the material distributing pipe penetrates through the material feeding hole to extend into the tower body and is arranged towards the hollow material guiding cone, the material distributing and adjusting plate is movably arranged on the material distributing and guiding pipe along the axial direction, a discharging gap is formed between the material distributing and guiding pipe and the hollow material guiding cone,
The first end of the lifting adjusting and positioning mechanism is arranged on the tower body, the second end of the lifting adjusting and positioning mechanism is connected with the material distribution adjusting plate, and the lifting adjusting and positioning mechanism is used for driving the material distribution adjusting plate to axially move and position so as to adjust the size of the material discharge gap.
9. The fuel coal separation device according to any one of claims 1 to 5, wherein,
The fuel coal sorting device also comprises a discharging chute and a conveying belt, wherein the conveying belt is positioned below the dispersion guide tower,
The discharging slide pipes are arranged in one-to-one correspondence with the discharging valves, the input ends of the discharging slide pipes are connected with the discharging valves, and the second ends of the discharging slide pipes are downwards arranged towards the conveying belt.
10. A fuel coal sorting device and a fuel coal screening control method, comprising the steps of:
Acquiring the corresponding pressure of an exhaust branch pipe of a separation chamber of each cyclone separator in real time;
obtaining an average pressure value;
If the current pressure of each exhaust branch pipe is consistent with the average pressure value, the normal operation is carried out; if the pressure corresponding to the exhaust branch pipe is smaller than the average pressure value, adjusting the secondary air volume of the separation chamber corresponding to the exhaust branch pipe until the current pressure of the separation chamber is consistent with the average pressure value;
Judging whether the secondary air supply quantity of the tangential air supply pipe corresponding to the separation chamber is between the minimum secondary air supply quantity and the maximum air supply quantity; if the secondary air supply quantity of the tangential air supply pipe corresponding to the separation chamber is between the minimum secondary air supply quantity and the maximum air supply quantity, the normal operation is carried out; and if the secondary air supply quantity of the tangential air supply pipe corresponding to the separation chamber is not between the minimum secondary air supply quantity and the maximum air supply quantity, adjusting the height of the cloth adjusting plate corresponding to the separation chamber so as to adjust the opening degree of the corresponding cloth opening until the pressure corresponding to the exhaust branch pipe is consistent with the average pressure value, and the secondary air supply quantity of the tangential air supply pipe corresponding to the separation chamber is between the minimum secondary air supply quantity and the maximum air supply quantity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410121244.9A CN117900045A (en) | 2024-01-29 | 2024-01-29 | Fuel coal sorting device and screening control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410121244.9A CN117900045A (en) | 2024-01-29 | 2024-01-29 | Fuel coal sorting device and screening control method |
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