A coal pulverizing device and method for adjusting coal particle size.

Abstract

This invention provides a pulverized coal forming device and method for adjusting coal particle size. The device includes a first pulverized coal flow module, a second pulverized coal flow module, a feeding device, and a roller forming machine. The first pulverized coal flow module surrounds the lower middle section of the second pulverized coal flow module. The discharge ends of both the first and second pulverized coal flow modules are connected to the feed end of the feeding device. The roller forming machine is located below the feed end of the feeding device. The method includes: conveying pulverized coal of a first particle size from the first pulverized coal flow module to the feeding device; conveying pulverized coal of a second particle size from the second pulverized coal flow module to the feeding device; receiving the first and second particle sizes of pulverized coal from the feeding device, with the first particle size surrounding the second particle size; and extruding the pulverized coal using the roller forming machine. This invention uses the method of the first particle size pulverized coal surrounding the second particle size pulverized coal to allow the roller forming machine to extrude briquettes, ensuring the uniformity of briquette density and guaranteeing briquette quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of powder coal forming technology, and particularly relates to a powder coal forming device for adjusting coal particle size and a method thereof. BACKGROUND

[0002] Powder coal forming is a process of forming a product with a certain shape, size, specific physical and chemical properties and different uses by pressing coal powder below 6mm under pressure when the coal powder is in a gelatinous state by adding an external binder or by rapid heating. When coal is formed, the interaction between the binder and the coal particles is a complex physical and chemical process. Not only is it related to the properties and structure of the binder and the coal itself, but also is closely related to the forming conditions. Since coal has the main properties of mainly non-polar surface, certain roughness and porosity on the surface, poor wettability and strong hydrophobicity, small forming particle size, plasticity and elasticity, etc., the coal itself can be used for binding or an external binder can be added during forming, and the coal particles are brought close to each other under the action of pressure by overcoming the elasticity of the coal, so that the coal particles are bound and formed.

[0003] The existing briquette is formed by pressing and forming a coal product with certain strength, size and shape by using powder coal as the main raw material according to the required proportion, mechanical strength and shape size, and has different shapes. For example, the domestic patent application publication No. 101214735 discloses a furnace front briquette forming machine. The forming roller of the patent publication is driven by the chain grate of an industrial boiler, and the outer diameter of the forming roller is provided with staggered ball socket molds. The ball socket molds are elliptical and have a protruding S-shaped platform on the center line.

[0004] At present, the surface of the briquette in contact with the mold is usually dense during the extrusion forming process of the briquette raw material, while the inside of the briquette is loose, which is difficult to ensure the uniformity of the briquette density and affects the study of the combustion characteristics of the briquette. SUMMARY

[0005] The present application provides a powder coal forming device for adjusting coal particle size and a method thereof. Since too large or too small coal particle size will cause voids in the briquette and lead to looseness, thereby affecting the compactness of the powder coal, the present application adopts the mode of surrounding the second particle size powder coal with the first particle size powder coal to make the roller forming machine extrude the briquette, so as to ensure the uniformity of the briquette density and ensure the quality of the briquette.

[0006] The technical scheme for achieving the object of the present application is as follows:

[0007] In one aspect, the present application provides a powder coal forming device for adjusting coal particle size, comprising:

[0008] a first powder coal flow module for conveying the first particle size powder coal;

[0009] a second pulverized coal flow module for conveying second pulverized coal of a second particle size, the first pulverized coal flow module surrounding a middle and lower section of the second pulverized coal flow module;

[0010] a feeding device for receiving first and second pulverized coal of first and second particle sizes, the discharge end of the first pulverized coal flow module and the discharge end of the second pulverized coal flow module both communicating with a feeding end of the feeding device;

[0011] a pair of roller forming machines for extruding the pulverized coal flowing out of the feeding device, the pair of roller forming machines being arranged below the feeding end of the feeding device.

[0012] The present application adopts the mode of surrounding the second particle size pulverized coal with the first particle size pulverized coal to let the pair of roller forming machines extrude the briquettes, ensuring the uniformity of the briquette density and guaranteeing the briquette quality.

[0013] Based on one aspect, in a possible implementation manner, the discharge end of the first pulverized coal flow module is flush with the discharge end of the second pulverized coal flow module.

[0014] The feeding end of the feeding device is connected with the discharge end of the first pulverized coal flow module and the discharge end of the second pulverized coal flow module.

[0015] The present application adopts the mode of flush discharge ends of the first and second pulverized coal flow modules to control the pulverized coal feeding, so that in actual application, it is convenient to install the feeding plate for controlling the pulverized coal feeding speed at the flush discharge ends, and the feeding speed of the first and second pulverized coal flow modules is controlled by adjusting the opening degree of the feeding plate and the discharge end.

[0016] Based on one aspect, in a possible implementation manner, the present application further comprises:

[0017] a distributing member for controlling the first particle size pulverized coal surrounding the second particle size pulverized coal, the distributing member being located between the first pulverized coal flow module and the feeding device and between the second pulverized coal flow module and the feeding device.

[0018] The first particle size pulverized coal of the first pulverized coal flow module and the second particle size pulverized coal of the second pulverized coal flow module both fall to the distributing member, and the distributing member is located at the feeding device after the first particle size pulverized coal surrounds the second particle size pulverized coal.

[0019] Since the particle size of the second particle size pulverized coal is smaller than that of the first particle size pulverized coal, the present application controls the action of the distributing member to let the second particle size pulverized coal slowly fall to the distributing member, and the first particle size pulverized coal surrounds the second particle size pulverized coal when falling from the distributing member to the feeding device.

[0020] Based on one aspect, in a possible implementation manner, the pulverized coal feeding amount of the feeding device is greater than the pulverized coal containing amount of the pair of roller forming machines.

[0021] The coal powder collecting device is located below the pair-roller forming machine and collects residual coal powder, which is the difference between the coal powder discharging amount and the coal powder containing amount.

[0022] The coal powder discharging amount of the discharging device is greater than the coal powder containing amount of the pair-roller forming machine, so that the pair-roller forming machine is in a state of having a surplus of coal powder, and the coal powder can be compacted when the pair-roller forming machine extrudes the coal powder.

[0023] In one possible implementation, the first coal powder flow module includes a main bin for placing the first coal powder particle size, and the first particle size coal powder in the main bin falls into the discharging device.

[0024] The second coal powder flow module includes a dosing bin for placing the second particle size coal powder and a circular pipe for the second particle size coal powder in the dosing bin to fall into, and the circular pipe is located below the dosing bin.

[0025] The circular pipe is located in the middle of the width direction of the main bin, and the dosing bin is located above the main bin.

[0026] The main bin and the circular pipe are both connected to the discharging device.

[0027] In another aspect, a coal powder forming method for adjusting the particle size of coal is provided, which includes:

[0028] The first particle size coal powder in the first coal powder flow module is transported to the discharging device.

[0029] The second particle size coal powder in the second coal powder flow module is transported to the discharging device.

[0030] The discharging device receives the first particle size coal powder and the second particle size coal powder, and the first particle size coal powder surrounds the second particle size coal powder.

[0031] The pair-roller forming machine extrudes the coal powder in the state that the first particle size coal powder surrounds the second particle size coal powder, so that the coal powder is formed into briquettes.

[0032] In one possible implementation, the first particle size coal powder and the second particle size coal powder first fall into the cloth piece and then fall into the discharging device from the cloth piece.

[0033] In one possible implementation, the cloth piece is a plurality of rotating blades with rotating shafts, and the first particle size coal powder and the second particle size coal powder fall into the rotating blades.

[0034] The rotating shafts rotate to drive the rotating blades to rotate, and the rotating blades generate centripetal force to force the second particle size coal powder to rotate around the first particle size coal powder, wherein the particle size of the second particle size coal powder is smaller than the particle size of the first particle size coal powder.

[0035] The first particle size pulverized coal falling into the feeding device surrounds the second particle size pulverized coal.

[0036] Based on another aspect, in a possible implementation, the amount of pulverized coal required for the roller forming machine to extrude is less than the sum of the amount of the first particle size pulverized coal and the amount of the second particle size pulverized coal falling into the roller forming machine from the feeding device or the distributing member.

[0037] Based on another aspect, in a possible implementation,

[0038] The excess pulverized coal containing the first particle size pulverized coal and the second particle size pulverized coal after the roller forming machine extrudes the briquette is collected into the pulverized coal collecting device.

[0039] The excess pulverized coal in the pulverized coal collecting device enters the first pulverized coal flow module, and the excess pulverized coal is transported to the feeding device with the first particle size pulverized coal in the first pulverized coal flow module.

[0040] Compared with the prior art, the present application has the following beneficial effects:

[0041] The present application adopts the way that the first particle size pulverized coal surrounds the second particle size pulverized coal to make the roller forming machine extrude the briquette, ensures the uniformity of the briquette density, and guarantees the briquette quality. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 A pulverized coal forming device for adjusting the particle size of coal is provided Figure 1 ;

[0043] Figure 2 A pulverized coal forming device for adjusting the particle size of coal is provided Figure 2 ;

[0044] Figure 3 Actual application diagram provided by the present application Figure 1 ;

[0045] Figure 4 Actual application diagram provided by the present application Figure 2 ;

[0046] Figure 5 The first pulverized coal flow module and the second pulverized coal flow module provided by the present application are shown in principle

[0047] Figure 6 A pulverized coal forming device for adjusting the particle size of coal is provided in principle

[0048] Figure 7 A pulverized coal forming method for adjusting the particle size of coal is provided in principle

[0049] In the figure, 1 - first pulverized coal flow module; 2 - second pulverized coal flow module; 3 - discharging device; 4 - double roller forming machine; 5 - cloth piece; 6 - conveying briquette belt; 7 - briquette bin; 110 - main bin; 120 - batching bin; 130 - round pipe; 140 - discharging system; 150 - upper bin opening; 160 - bin bottom; 170 - horn shape; 210 - support; 220 - mounting platform; 230 - double roller forming machine. DETAILED DESCRIPTION

[0050] The application will be described in detail below with reference to the embodiments shown in the drawings, but it should be noted that these embodiments are not limiting to the application, and equivalent transformations or substitutions of function, method or structure made by those skilled in the art according to these embodiments are within the protection scope of the application.

[0051] In the description of the embodiments, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the application.

[0052] In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0053] The terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances. EMBODIMENT

[0054] Please refer to Figure 1 and Figure 2The embodiment of the present application provides a coal powder forming device for adjusting the particle size of coal, which comprises: a first coal powder flow module 1 for conveying coal powder of a first particle size, a second coal powder flow module 2 for conveying coal powder of a second particle size, a discharging device 3 for receiving the coal powder of the first particle size and the coal powder of the second particle size, and a pair of roller forming machines 4 for extruding the coal powder flowing out of the discharging device 3, wherein the first coal powder flow module 1 surrounds the middle and lower sections of the second coal powder flow module 2; the discharge end of the first coal powder flow module 1 and the discharge end of the second coal powder flow module 2 are both communicated with the feeding end of the discharging device 3; and the pair of roller forming machines 4 are arranged below the discharging end of the discharging device 3.

[0055] The embodiment of the present application adopts the mode that the coal powder of the first particle size surrounds the coal powder of the second particle size to make the pair of roller forming machines 4 extrude the briquettes, thereby ensuring the uniformity of the briquette density and guaranteeing the briquette quality. The embodiment of the present application can solve the problem of internal looseness of the briquettes to a certain extent. If the particle size of the coal is too large or too small, gaps will appear in the briquettes, thereby affecting the flowability and compactibility of the coal. Proper adjustment of the particle size of the coal can make the coal fill more closely, thereby increasing the strength and density of the coal blocks and reducing the internal looseness of the briquettes.

[0056] Please refer to Figure 2 and Figure 4 The coal powder forming device for adjusting the particle size of coal provided by the embodiment of the present application preferably has the discharge end of the first coal powder flow module 1 flush with the discharge end of the second coal powder flow module 2; and the feeding end of the discharging device 3 is connected with the discharge end of the first coal powder flow module 1 and the discharge end of the second coal powder flow module 2.

[0057] The embodiment of the present application adopts the mode that the discharge ends of the first coal powder flow module 1 and the second coal powder flow module 2 are flush, thereby controlling the discharging of the coal powder. In actual application, it is convenient to install a discharging plate for controlling the discharging speed of the coal powder at the flush discharge ends, and the discharging speed of the first coal powder flow module 1 and the second coal powder flow module 2 can be controlled by adjusting the opening degree of the discharging plate and the discharge end.

[0058] Please refer to Figure 2 and Figure 4 The coal powder forming device for adjusting the particle size of coal provided by the embodiment of the present application comprises, in addition to the first coal powder flow module 1, the second coal powder flow module 2, the discharging device 3 and the pair of roller forming machines 4, a distributing member 5 for controlling the coal powder of the first particle size to surround the coal powder of the second particle size, wherein the distributing member 5 is located between the first coal powder flow module 1 and the discharging device 3 and between the second coal powder flow module 2 and the discharging device 3; the coal powder of the first particle size of the first coal powder flow module 1 and the coal powder of the second particle size of the second coal powder flow module 2 all fall to the distributing member 5, and the distributing member 5 is located at the discharging device 3 after the coal powder of the first particle size surrounds the coal powder of the second particle size.

[0059] In practical application, the distributing member 5 of the embodiment of the present application comprises a rotating shaft and several rotating blades. The rotating shaft is perpendicular to the central axis of the bottom of the first powder coal flow module 1 and the second powder coal flow module 2, and the rotating blades are fixed around the rotating shaft. The embodiment of the present application designs the shape of the blades so that the powder coal with small particle size is attracted to the periphery of the blades, thereby being concentrated and accumulated around the powder coal with large particle size.

[0060] Since the particle size of the second particle size powder coal is smaller than that of the first particle size powder coal, the embodiment of the present application controls the action of the distributing member 5 to allow the second particle size powder coal to slowly fall to the distributing member 5, and the first particle size powder coal to surround the second particle size powder coal when falling from the distributing member 5 to the discharging device 3. The embodiment of the present application generates centrifugal force and centripetal force through the rotation of the blades, thereby forcing the second particle size powder coal to rotate around the first particle size powder coal and finally gather and accumulate together. The embodiment of the present application can control the flow mode and speed of the powder coal between the blades by adjusting the distance and angle between the blades, thereby promoting the second particle size powder coal to concentrate and accumulate around the first particle size powder coal. Generally, the blade shape with a narrow blade gap and a large blade inclination angle can effectively attract the second particle size powder coal to the periphery of the blades, which further allows the first particle size powder coal to surround the second particle size powder coal when the distributing member 5 falls to the discharging device 3.

[0061] In practical application, preferably, the discharging amount of the powder coal of the discharging device 3 is greater than the powder coal containing amount of the roller forming machine 4. In addition to comprising the first powder coal flow module 1, the second powder coal flow module 2, the discharging device 3 and the roller forming machine 4, the powder coal forming device for adjusting the particle size of coal provided by the embodiment of the present application further comprises a powder coal collecting device located below the roller forming machine 4, which collects residual powder coal, which is the difference between the discharging amount of the powder coal and the powder coal containing amount.

[0062] The embodiment of the present application adopts the mode that the discharging amount of the powder coal of the discharging device 3 is greater than the powder coal containing amount of the roller forming machine 4, so that the amount of the powder coal at the roller forming machine 4 is in surplus, which allows the powder coal to be compacted when the roller forming machine 4 extrudes the powder coal. The embodiment of the present application adopts the mode of surplus powder coal to make the roller forming machine 4 compact the briquettes, so that the loose parts inside the briquettes are tightly combined, the density and strength of the briquettes are improved, and the uniformity of the briquettes is improved.

[0063] Please refer to Figure 5 and Figure 6The first pulverized coal flow module 1 comprises a main bin 110 for placing the first pulverized coal particle size, and the first particle size pulverized coal in the main bin 110 falls into the discharging device 3; the second pulverized coal flow module 2 comprises a batching bin 120 for placing the second particle size pulverized coal and a circular pipe 130 for falling of the second particle size pulverized coal in the batching bin 120, and the circular pipe 130 is located below the batching bin 120; the circular pipe 130 is located in the middle of the width direction of the main bin 110, and the batching bin 120 is located above the main bin 110; the main bin 110 and the circular pipe 130 are both communicated with the discharging device 3. In the embodiment of the present application, the pulverized coal is delivered to the feeding port of the pair roller forming machine 4, and due to the double roller extrusion of the pair roller forming machine 4, the pulverized coal is compacted.

[0064] Please continue to refer to Figure 5 and Figure 6 The pulverized coal forming device in the embodiment of the present application comprises a main bin 110 for placing the first particle size pulverized coal, a batching bin 120 for placing the second particle size pulverized coal, a circular pipe 130 connected with the batching bin 120 and located below the batching bin 120, and a discharging device 3 communicated with the main bin 110 and the circular pipe 130; the pulverized coal forming unit is located on both sides of the discharging device 3, so that the pulverized coal forming unit works to compact the pulverized coal in the discharging device 3 into briquettes; the pulverized coal of the first particle size in the main bin 110 and the pulverized coal of the second particle size in the batching bin 120 both flow to the discharging device 3; the batching bin 120 and the circular pipe 130 are both located in the middle of the main bin 110, so that the pulverized coal of the second particle size is located in the radial middle part of the discharging device 3, and the pulverized coal of the first particle size is located outside the radial middle part of the discharging device 3. In the embodiment of the present application, the main bin 110 is used to hold the coal material of the first particle size pulverized coal, the batching bin 120 is used to hold the coal material of the second particle size pulverized coal, the coal material of the first particle size pulverized coal and the coal material of the second particle size pulverized coal are combined together in the discharging device 3 to provide the pulverized coal forming unit for compacting briquettes, and the coal material of the second particle size pulverized coal is different from the coal material of the first particle size pulverized coal, which overcomes the defect that the briquettes are relatively loose inside after being compacted by the pulverized coal forming unit and ensures the uniformity of the briquette density.

[0065] In the embodiment of the present application, the top end of the circular pipe 130 extends out of the upper bin opening 150 of the main bin 110, and the top end of the circular pipe 130 is connected with the bin bottom 160 of the batching bin 120; the batching bin 120 is located directly above the middle of the main bin 110. In the embodiment of the present application, the batching bin 120 is higher than the main bin 110, which does not affect the placement of the pulverized coal of the first particle size into the main bin 110 and does not affect the placement of the pulverized coal of the second particle size into the batching bin 120.

[0066] The diameter of the circular tube 130 is preferably less than 1 / 3-1 / 6 of the width of the main bin 110. In the embodiment of the present application, the diameter of the circular tube 130 is less than 1 / 3-1 / 6 of the width of the main bin 110, so that the amount of the second particle size pulverized coal mixed into the pulverized coal is reduced, the amount of the second particle size pulverized coal entering the discharging device 3 is controlled, and only the defect of the internal looseness of the briquette needs to be overcome.

[0067] The bottom end of the circular tube 130 is preferably in contact with the bottom 160 of the main bin 110, the bottom 160 of the main bin 110 is provided with a discharge port surrounding the bottom end of the circular tube 130, and the inlet of the discharging device 3 is in communication with the discharge port and the bottom end of the circular tube 130. In the embodiment of the present application, the discharge port surrounds the bottom end of the circular tube 130, so that the first particle size pulverized coal surrounds the second particle size pulverized coal, and the pulverized coal entering the discharging device 3 can be surrounded by the first particle size pulverized coal, and most of the second particle size pulverized coal is located in the internal looseness of the briquette. By replacing the first particle size pulverized coal in the internal looseness of the briquette with the second particle size pulverized coal, the uniformity of the briquette density is improved.

[0068] The inlet of the discharging device 3 is preferably a horn shape 170, the middle of the horn shape 170 is in communication with the bottom end of the circular tube 130, and the outer periphery of the horn shape 170 is in communication with the discharge port. The pulverized coal forming unit preferably comprises: a pair of roller forming machines 4 for pressing the pulverized coal into briquettes, and a support 210 for fixing the pair of roller forming machines 4. The support 210 is located below the discharging device 3, and the pair of roller forming machines 4 are located on both sides of the discharging device 3.

[0069] In the embodiment of the present application, the first particle size pulverized coal surrounds the second particle size pulverized coal, so that the pair of roller forming machines 4 extrude the briquette, ensuring the uniformity of the briquette density and the quality of the briquette. Embodiment

[0070] The pulverized coal forming method for adjusting the particle size of coal material provided in the embodiment of the present application is based on the pulverized coal forming device for adjusting the particle size of coal material in the embodiment 1.

[0071] Please refer to Figures 1 to 7 The pulverized coal forming method for adjusting the particle size of coal material provided in the embodiment of the present application comprises: conveying the first particle size pulverized coal in the first pulverized coal flow module 1 to the discharging device 3; conveying the second particle size pulverized coal in the second pulverized coal flow module 2 to the discharging device 3; receiving the first particle size pulverized coal and the second particle size pulverized coal by the discharging device 3, and surrounding the second particle size pulverized coal with the first particle size pulverized coal; extruding the pulverized coal in the state of the first particle size pulverized coal surrounding the second particle size pulverized coal by the pair of roller forming machines 4, so as to form the pulverized coal into briquettes.

[0072] The coal particle size adjusting and pulverized coal forming method provided by the embodiment of the present application preferably first particle size pulverized coal and second particle size pulverized coal fall to the distributing member 5, and then fall to the discharging device 3 from the distributing member 5.

[0073] The coal particle size adjusting and pulverized coal forming method provided by the embodiment of the present application preferably the distributing member 5 is a plurality of rotating blades with rotating shafts, and the first particle size pulverized coal and the second particle size pulverized coal fall to the rotating blades; the rotating shafts rotate to drive the rotating blades to rotate, and the rotating blades generate centripetal force to force the second particle size pulverized coal to rotate around the first particle size pulverized coal, wherein the particle size of the second particle size pulverized coal is smaller than the particle size of the first particle size pulverized coal; the first particle size pulverized coal falling to the discharging device 3 surrounds the second particle size pulverized coal.

[0074] The coal particle size adjusting and pulverized coal forming method provided by the embodiment of the present application preferably the amount of the pulverized coal required by the pair-roller forming machine 4 for extrusion forming is less than the sum of the amount of the first particle size pulverized coal and the amount of the second particle size pulverized coal falling to the pair-roller forming machine 4 from the discharging device 3 or the distributing member 5.

[0075] The coal particle size adjusting and pulverized coal forming method provided by the embodiment of the present application preferably the excess pulverized coal containing the first particle size pulverized coal and the second particle size pulverized coal after the pair-roller forming machine 4 extrudes the briquettes is collected to the pulverized coal collecting device; the excess pulverized coal in the pulverized coal collecting device enters the first pulverized coal flowing module 1, and the excess pulverized coal is transported to the discharging device 3 along with the first particle size pulverized coal in the first pulverized coal flowing module 1.

[0076] Please continue to refer to Figures 1 to 7The coal powder forming device in the coal powder forming method for adjusting the particle size of coal material provided by the embodiment of the present application comprises a main bin 110, a batching bin 120, a round pipe 130, a valve, a pair of roller forming machines 4, a support 210, a base, a motor, a discharging device 3, a supporting rod and a mass sensor. The bottom of the main bin 110 is connected with the batching bin 120 through the round pipe 130, and the batching bin 120 is provided with a valve. The mass sensor is arranged on the bin, and the discharging device 3 is supported by the supporting rod. The pair of roller forming machines 4 are supported by the support 210, which is installed on the base, and the motor is additionally installed on the base. The bottom of the main bin 110 is connected with the batching bin 120 through the round pipe 130, and the batching bin 120 is provided with a valve. The mass sensor is arranged on the bin, and the bin, the batching bin 120, the round pipe 130, the valve, the supporting rod and the mass sensor constitute the discharging device 3. The mass sensor arranged on the main bin 110 can control the amount of material in the main bin 110, and the valve of the batching bin 120 can control the discharging speed of the material in the round pipe 130. The pair of roller forming machines 4 are supported by the support 210, which is installed on the base, and the motor is additionally installed on the base. The motor can drive the pair of roller forming machines 4 to move relatively by belt transmission, and the pair of roller forming machines 4 can be extruded to form the coal material. The pair of roller forming machines 4 can be replaced by structures with different curvatures, different shapes and different surface roughnesses. The main bin 110 and the batching bin 120 can change the types of material and the particle size, and the proportion of the two types of material can be adjusted by controlling the opening degree of the valve and monitoring the weight change of the material in the main bin 110. The bottom 160 of the bin is connected with the batching bin 120 through the round pipe 130 along the center, and the outer circle of the center hole of the bin is uniformly distributed with small holes smaller than the holes of the round pipe 130, and the batching bin 120 is provided with a valve. The mass sensor is arranged on the bin, and the discharging device 3 is supported by the supporting rod. The pair of roller forming machines 4 are supported by the support 210, which is installed on the base, and the motor is additionally installed on the base. The motor can drive the pair of roller forming machines 4 to move relatively by belt transmission, and the pair of roller forming machines 4 can be extruded to form the coal material. The pair of roller forming machines 4 can be replaced by structures with different curvatures, different shapes and different surface roughnesses. The opening degree of the valve can adjust the discharging speed of the batching bin 120, the mass sensor can control the amount of material in the main bin 110, the batching amount can be calculated in advance, and the mixing effect of the subsequent main material and batching material and the quality of the formed coal particles can be ensured.

[0077] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not used to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

[0078] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0079] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A coal pulverizing device for adjusting coal particle size, characterized in that, The application relates to a coal powder conveying device. The device comprises: a first coal powder flow module for conveying first-size coal powder; a second coal powder flow module for conveying second-size coal powder, the first coal powder flow module surrounding the middle and lower section of the second coal powder flow module; a coal powder feeding device for receiving the first-size coal powder and the second-size coal powder, the discharge end of the first coal powder flow module and the discharge end of the second coal powder flow module being connected to the feeding end of the coal powder feeding device; 2. The coal size-adjusting briquetting apparatus according to claim 1, wherein a pair of roller forming machines for extruding the coal powder flowing out of the coal powder feeding device, the pair of roller forming machines being arranged below the feeding end of the coal powder feeding device. The discharge end of the first coal powder flow module is flush with the discharge end of the second coal powder flow module.

3. The coal size-adjusting briquetting apparatus according to claim 1 or 2, wherein The feeding end of the coal powder feeding device is connected to the discharge end of the first coal powder flow module and the discharge end of the second coal powder flow module. The device further comprises: a coal powder distributing member for controlling the first-size coal powder to surround the second-size coal powder, the coal powder distributing member being arranged between the first coal powder flow module and the coal powder feeding device and between the second coal powder flow module and the coal powder feeding device; 4. The coal size-adjusting briquetting apparatus according to claim 1, wherein the first-size coal powder of the first coal powder flow module and the second-size coal powder of the second coal powder flow module both falling to the coal powder distributing member, and the coal powder distributing member being arranged below the coal powder feeding device after the first-size coal powder surrounds the second-size coal powder. The coal powder feeding amount of the coal powder feeding device is greater than the coal powder containing amount of the pair of roller forming machines.

5. The coal size-adjusting briquetting apparatus according to claim 1, wherein The device further comprises a coal powder collecting device arranged below the pair of roller forming machines, the coal powder collecting device collecting residual coal powder, which is the difference between the coal powder feeding amount and the coal powder containing amount. The first coal powder flow module comprises a main bin for placing the first-size coal powder, the first-size coal powder in the main bin falling to the coal powder feeding device; The second coal powder flow module comprises a distributing bin for placing the second-size coal powder and a circular pipe for allowing the second-size coal powder in the distributing bin to fall, the circular pipe being arranged below the distributing bin; The circular pipe is arranged at the middle of the width direction of the main bin, and the distributing bin is arranged above the main bin; 6. A method of briquetting pulverized coal by adjusting the particle size of coal, characterized by The main bin and the circular pipe are both connected to the coal powder feeding device. The device comprises: the first-size coal powder in the first coal powder flow module being conveyed to the coal powder feeding device; the second-size coal powder in the second coal powder flow module being conveyed to the coal powder feeding device; the coal powder feeding device receiving the first-size coal powder and the second-size coal powder, and the first-size coal powder surrounding the second-size coal powder; 7. The method for molding fine coal according to claim 6, wherein the pair of roller forming machines extruding the coal powder in the state that the first-size coal powder surrounds the second-size coal powder, so that the coal powder is formed into briquettes.

8. The method for molding fine coal according to claim 7, wherein The first-size coal powder and the second-size coal powder first fall to the coal powder distributing member and then fall to the coal powder feeding device from the coal powder distributing member. The coal powder distributing member is a plurality of rotating blades with rotating shafts, and the first-size coal powder and the second-size coal powder fall to the rotating blades. The rotating shafts rotate to drive the rotating blades to rotate, and the rotating blades generate centripetal force to force the second-size coal powder to rotate around the first-size coal powder, wherein the particle size of the second-size coal powder is smaller than the particle size of the first-size coal powder.

9. The method of claim 6, wherein the coal particle size is adjusted. The first-size coal powder falling into the coal powder feeding device surrounds the second-size coal powder. The required coal powder amount extruded by the pair of roller forming machines is smaller than the sum of the first-size coal powder amount and the second-size coal powder amount falling to the pair of roller forming machines from the coal powder feeding device or the coal powder distributing member.

10. The method for forming a coal briquette by adjusting the particle size of coal according to claim 9, wherein The excess pulverized coal containing the first size pulverized coal and the second size pulverized coal after being extruded by the roller forming machine is collected to the pulverized coal collecting device; The excess pulverized coal in the pulverized coal collecting device enters the first pulverized coal flow module, and the excess pulverized coal is transported to the discharging device with the first size pulverized coal in the first pulverized coal flow module.

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