A pulverizing assembly and coal pulverizing treatment device for thermal power generation

Abstract

The application discloses a crushing assembly and a coal crushing treatment device for thermal power generation, and relates to the technical field of coal production and recovery of thermal power plants. The crushing assembly comprises a crushing bin, a crushing mechanism and two sets of regulation and control assemblies, and a first crushing area of dry materials, a second crushing area of wet materials and a third crushing area of dry materials are formed in the crushing bin. The coal crushing treatment device for thermal power generation comprises a separation bin, an air separation mechanism and the crushing assembly. The air separation mechanism comprises two sets of air separation assemblies, and the air separation assemblies are used for air separation of the coal at the feeding port. The crushing assembly and the coal crushing treatment device for thermal power generation screen the materials by using the air separation principle, so that the falling materials enter different crushing areas to wait for crushing, and the crushing of the dry materials and the wet materials is completed by using a certain crushing sequence, so that the dry materials are not affected by the moisture of the wet materials as much as possible, and the overall crushing efficiency is ensured.

Description

Technical Field

[0001] This invention relates to the field of coal production and recycling technology in thermal power plants, and more specifically, to a crushing component and a coal crushing and processing device for thermal power generation. Background Technology

[0002] In thermal power generation, coal needs to be crushed into fine particles to increase its surface area, thereby improving combustion efficiency and reducing pollutant emissions. Coal crushing equipment (usually referring to coal mills or pulverized coal preparation systems) is one of the key auxiliary equipment in thermal power plants, utilizing crushing mechanisms to coarsely crush raw coal.

[0003] In actual crushing operations, some raw coal contains a certain amount of moisture. When this moist raw coal is crushed, the moisture will overflow, which will increase the stickiness of the raw coal and thus affect the crushing efficiency. In addition, when dry raw coal is crushed together with wet raw coal, the dry raw coal will also stick together with the wet raw coal in the crushing process, thus affecting the crushing efficiency of the dry raw coal.

[0004] In view of the above, this application is hereby submitted. Summary of the Invention

[0005] The first objective of this invention is to provide a crushing assembly having a dry-wet separation crushing zone, thereby reducing the impact of wet raw coal on dry raw coal and ensuring the crushing efficiency of dry raw coal. The second objective of this invention is to provide a coal crushing and processing device for thermal power generation. This device can not only use the principle of air separation to separate raw coal into dry and wet materials, but also has the function of dry and wet separation and crushing, thereby ensuring the overall crushing efficiency by utilizing the crushing sequence.

[0006] The embodiments of the present invention are implemented as follows: In a first aspect, a pulverizing assembly includes a pulverizing chamber, a pulverizing mechanism, and two sets of control components. The pulverizing chamber contains a first pulverizing zone, a second pulverizing zone, and a third pulverizing zone. The first and third pulverizing zones are located on either side of the second pulverizing zone. The second pulverizing zone is used for pulverizing wet materials, while both the first and third pulverizing zones are used for pulverizing dry materials. The pulverizing mechanism is installed within the pulverizing chamber and includes a first pulverizing roller, a second pulverizing roller, and two sets of side teeth. The first and second pulverizing rollers mesh with each other, and the two sets of side teeth respectively mesh with the first pulverizing roller. On the side of the crushing roller and the second crushing roller that are far apart from each other, the biting area between the first crushing roller and the second crushing roller connects to the second crushing area, the biting area of ​​the first crushing roller and one of the sets of side teeth connects to the first crushing area, and the biting area of ​​the second crushing roller and another set of side teeth connects to the third crushing area; one set of the control components is located between the second crushing area and the first crushing area and is used to selectively connect or block the two areas; another set of the control components is located between the second crushing area and the third crushing area and is used to selectively connect or block the two areas.

[0007] In some optional embodiments, the control assembly includes a partition assembly and two sets of adjusting members, which are located on both sides of the crushing chamber along the axial direction of the crushing roller. Each adjusting member includes a base and a lifting rod. The base is installed inside the crushing chamber and located above each crushing area. The lifting rod is vertically telescopically connected to the base. The partition assembly includes a connecting plate and multiple partition teeth. The connecting plate is fixed between the two lifting rods. The multiple partition teeth are arranged in parallel below the connecting plate. Each partition tooth is used to exit or extend into the crushing tooth gap of the corresponding crushing roller and to connect or block the corresponding crushing areas.

[0008] In some alternative embodiments, the base includes a first base and a second base, the first base being fixedly connected to the crushing chamber, the lifting rod being vertically telescopically connected to the second base, the first base and the second base being telescopically connected to each other, and the telescopic direction being perpendicular to the length direction of the crushing roller, so that the partition assembly can move in a direction perpendicular to the length of the crushing roller.

[0009] In some optional embodiments, the first substrate and the second substrate are telescopically connected by a sliding shaft, one end of which is fixedly connected to the second substrate and the other end slides through the first substrate; in the same control assembly, a linkage rod is connected between the extended ends of the two sets of sliding shafts, and the linkage rod is used to make the sliding shaft slide back and forth under the drive of an external force.

[0010] Secondly, a coal pulverizing and processing device for thermal power generation includes a separation chamber, an air separation mechanism, and the aforementioned pulverizing components; the separation chamber is located above the pulverizing chamber, and an air separation area and a drop area are formed within the separation chamber, the drop area being located between the pulverizing area and the air separation area; the air separation mechanism includes two sets of air separation components, located on opposite sides of the air separation area along the line connecting the first pulverizing area and the third pulverizing area; wherein, the central part of the air separation area is used to form a coal inlet, and the air separation components are used to separate the coal at the inlet by air separation, so that wet coal falls into the second pulverizing area and dry coal falls through the drop area into the first pulverizing area or the third pulverizing area.

[0011] In some alternative embodiments, the air separation assembly includes an air compressor system and multiple sets of blowers arranged along the length of the crushing roller on the side wall of the separation chamber. The air compressor system is used to supply air to the multiple sets of blowers so that the two sets of air separation assemblies can alternately separate the coal.

[0012] In some alternative embodiments, the blower includes a blower head, a dust cover, and a protective plate assembly. The blower head is installed on the side wall of the separation chamber, and the dust cover is installed above the blower head to prevent coal from hitting the top of the blower head. The protective plate assembly has air sieve holes and is installed in front of the air outlet of the blower head to prevent a large amount of coal from entering the air outlet.

[0013] In some optional embodiments, the protective plate assembly includes an outer protective plate and an inner protective plate. The top of the outer protective plate is fixed to the dust cover, and the outer protective plate has a first air screening hole that allows airflow generated by the blower head to pass through. The inner protective plate is located between the blower head and the outer protective plate, and the top of the inner protective plate is hinged to the dust cover, allowing the lower part of the inner protective plate to swing towards or away from the outer protective plate. The inner protective plate has a second air screening hole that moves closer to the outer protective plate when the lower part of the inner protective plate is acted upon by the blower head, so that the second air screening hole aligns with the first air screening hole, allowing airflow to pass through. The dust cover is provided with a reset device acting on the inner protective plate. When the action of the blower head decreases or disappears, the reset device allows the lower part of the inner protective plate to move away from the outer protective plate, so that the second air screening hole is misaligned with the first air screening hole, preventing a large amount of coal from entering the blower opening.

[0014] In some alternative embodiments, a trigger rod is provided at the bottom of the inner protective plate. The trigger rod is kinetically connected to the linkage rod. When the trigger rod swings with the lower part of the inner protective plate, it can cause the trigger rod to slide back and forth.

[0015] In some alternative embodiments, when the trigger rod swings inward following the lower part of the inner protective plate, it can be pulled to slide away from the second crushing area, so that the partition teeth block the corresponding crushing areas; when the trigger rod swings outward following the lower part of the inner protective plate, it can be pushed to slide closer to the second crushing area, so that the partition teeth connect the corresponding crushing areas and allow material to pass through.

[0016] The beneficial effects of the embodiments of the present invention are: The crushing assembly provided in this embodiment of the invention divides the space inside the crushing chamber into a first crushing zone, a second crushing zone, and a third crushing zone. The second crushing zone in the middle is used to crush wet materials (or wet raw coal), while the first and third crushing zones on both sides are used to crush dry materials (or dry raw coal). This design considers the raw material crushing process from the perspective of separating wet and dry materials, preventing the dry material from being affected by the moisture overflowing during the crushing of wet materials, thus ensuring the crushing efficiency. In addition, by using two sets of control components to form a barrier or connection between the diameters of the crushing zones, the crushing of materials on one side (dry or wet) can continue after the crushing of materials on the other side is completed, so that the crushing of dry and wet materials does not affect each other, thereby ensuring the overall crushing efficiency. The coal crushing and processing device for thermal power generation provided in this embodiment of the invention utilizes a separation air separation structure and the above-mentioned crushing components to first separate the falling raw coal by air separation, so that wet materials and dry materials are thrown into the corresponding crushing areas under the action of air separation. Thus, the crushing characteristics and advantages of the above-mentioned crushing components are used to complete the crushing operation of raw coal, so as to achieve the purpose of high overall crushing efficiency. In general, the crushing components and coal crushing and processing devices for thermal power generation provided in the embodiments of the present invention utilize the principle of air classification to screen materials, so that the thrown materials enter different crushing zones to wait for crushing, and complete the crushing operation of dry materials and wet materials using a certain crushing sequence, so that the dry materials are not affected by the moisture overflowing from the wet materials as much as possible, thereby ensuring the overall crushing efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the pulverizing component provided in an embodiment of the present invention; Figure 2 for Figure 1 A partial structural schematic diagram of the crushing component shown; Figure 3 for Figure 2 Enlarged schematic diagram of point A of the structure shown; Figure 4 This is a schematic diagram of the structure of a coal pulverizing and processing device for thermal power generation provided in an embodiment of the present invention; Figure 5 for Figure 4 An enlarged schematic diagram of point B in the structure shown; Figure 6 This is a schematic diagram of the structure of a blower provided in an embodiment of the present invention.

[0019] Icons: 100-Separation chamber; 200-Air separation mechanism; 201-Blower; 300-Pulverizing chamber; 301-First pulverizing zone; 302-Second pulverizing zone; 303-Third pulverizing zone; 400-Pulverizing mechanism; 401-First pulverizing roller; 402-Second pulverizing roller; 403-Side tooth pair; 500-Control assembly; 501-Adjusting component; 502-Isolation assembly; 2011-Dust cover; 2012-Blower head; 2013-Protective plate assembly; 2014-Trigger rod; 5011-Base; 5012-Lifting rod; 5013-Linkage rod; 5021-Connecting plate; 5022-Isolation tooth; 20131-Outer protective plate; 20132-First screen air hole; 20133 - Inner protective plate; 20134 - Second screen air hole; 50111 - First substrate; 50112 - Second substrate; 50113 - Sliding shaft. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, the terms "parallel" and "perpendicular" do not imply that components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be perfectly parallel, but that it can be slightly tilted.

[0025] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0027] In the process of processing raw coal in thermal power plants, crushing equipment is generally used to continuously pulverize the falling raw coal. However, a major challenge encountered in actual operation is the moisture content of the raw coal. When the raw coal contains a certain amount of moisture, the release of moisture during crushing will increase the stickiness between coal particles. This not only reduces the processing capacity of the crushing equipment but may also lead to blockages or agglomeration inside the equipment, seriously affecting crushing efficiency and operational stability. In addition, if dry raw coal is mixed with moist raw coal for crushing, the stickiness of the wet coal will cause the dry coal to adhere, further affecting the crushing effect of the dry coal and causing the overall crushing efficiency to decrease further. To overcome the above problems, we implemented dry-wet separation on the raw coal transportation line, separating the raw coal to be crushed into dry and wet parts, which were then crushed separately. Although this solved the problem of low crushing efficiency to a certain extent, it increased the investment in equipment (separation equipment and crushing equipment) and the number of processes, which was not conducive to low-cost operation. Therefore, this embodiment provides a crushing component and a coal crushing and processing device for thermal power generation, which can perform dry-wet separation before crushing and after material feeding, thereby realizing independent crushing operations for dry and wet materials. This not only avoids excessive investment in equipment, increasing costs and land occupation, but also has a relatively simple process and is easier to operate.

[0028] Please refer to the details. Figure 1 and Figure 2 The crushing assembly provided in this embodiment includes a crushing chamber 300, a crushing mechanism 400, and two sets of control components 500. The crushing chamber 300 is mainly used to provide crushing space for materials (raw coal). Compared with the traditional single crushing space, the crushing chamber 300 has a first crushing area 301, a second crushing area 302, and a third crushing area 303. The first crushing area 301 and the third crushing area 303 are located on both sides of the second crushing area. In addition, the second crushing area 302 is used for crushing wet materials, and the first crushing area and the third crushing area 303 are both used for crushing dry materials. This means that the crushing chamber 300 is cleverly divided into three independent yet collaboratively operating zones (first crushing zone 301, second crushing zone 302, and third crushing zone 303). This three-zone crushing chamber 300 design not only improves the material handling capacity and efficiency of the entire system, but also greatly enhances its adaptability to different raw material conditions. By physically separating the crushing environments of wet and dry materials, the system can flexibly cope with changing raw material conditions, and can achieve good independent crushing results for both wet and dry coal.

[0029] The crushing mechanism 400 is installed inside the crushing chamber 300 and includes a first crushing roller 401, a second crushing roller 402, and two sets of side tooth pairs 403. Specifically, the first crushing roller 401 and the second crushing roller 402 mesh with each other (meshing refers to the ability to form a meshing gap between teeth to crush materials). The two sets of side tooth pairs 403 mesh with the first crushing roller 401 and the second crushing roller 402 on the sides away from each other, thereby forming an overall form in which the side tooth pairs 403-first crushing roller 401-second crushing roller 402-side tooth pairs 403 mesh sequentially, forming three crushing points among the four components. Specifically, the meshing area between the first crushing roller 401 and the second crushing roller 402 is connected to the second crushing area 302 (for crushing wet materials), the meshing area between the first crushing roller 401 and one set of side tooth pairs 403 is connected to the first crushing area 301 (for crushing dry materials), and the meshing area between the second crushing roller 402 and another set of side tooth pairs 403 is connected to the third crushing area 303 (for crushing dry materials). Thus, the traditional single-point crushing method is replaced by a multi-point crushing method, eliminating the need for adding a crusher to achieve independent crushing of dry and wet materials, which previously significantly increased costs and floor space.

[0030] Based on the above technical solution, a structure is formed with a wet material crushing zone in the middle and dry material crushing zones on both sides. In terms of implementation, dry and wet materials can be crushed separately at different crushing points or sequentially at the same crushing point, thus achieving independent crushing and avoiding the situation where simultaneous crushing leads to excessively low crushing efficiency. However, regardless of the method, the wet material crushing zone and the dry material crushing zone need to be physically isolated during the working cycle to prevent material displacement. That is, two sets of control components 500 are needed for selective physical isolation or connection. Specifically, one set of control components 500 is located between the second crushing zone 302 and the first crushing zone 301, and is used to selectively connect or isolate these two zones; the other set of control components 500 is located between the second crushing zone 302 and the third crushing zone 303, and is used to selectively connect or isolate these two zones.

[0031] It should be noted that in some embodiments, the control component 500 can be a structure that uses a vertical lifting principle to block the upper surface of the corresponding crushing roller. When it is close to the upper surface of the crushing roller, it can achieve blocking; conversely, when it is away from the upper surface of the crushing roller, it can achieve connection. In other embodiments, the control component 500 can also be a structure that uses a horizontal telescopic principle to block the highest point of the inner diameter of the corresponding crushing roller. When it slides horizontally towards the highest point of the inner diameter of the crushing roller, it can achieve blocking; conversely, when it slides away from the highest point of the inner diameter of the crushing roller, it can achieve connection. Of course, in different embodiments, both of the above functions can be achieved simultaneously to achieve the purpose of connection and blocking.

[0032] The above technical solutions enable multi-point crushing in the same crushing equipment. With the help of the control component 500, simultaneous or selective blocking can be achieved. It can be used for independent crushing of dry and wet materials, or dry and wet separation can be carried out sequentially at the same point. It is applicable to a variety of scenarios and effectively solves the problem of simultaneous separation of dry and wet materials at the same point, which affects the crushing efficiency.

[0033] Please see Figure 2 and Figure 3 In this embodiment, to achieve effective connection and isolation of the control component 500, the control component 500 includes an isolation component 502 and two sets of adjusting members 501. The two sets of adjusting members 501 are used to achieve synchronous adjustment of position or direction, and the isolation component 502 is used to achieve isolation and connection of the crushing area. Specifically, along the axial direction of the crushing roller, the two sets of adjusting members 501 are respectively located on both sides of the crushing chamber 300; that is, the two sets of adjusting members 501 are arranged along the axial direction (length direction) of the first crushing roller 401 or the second crushing roller 402 (which are arranged parallel to each other), so that the two sets of adjusting members 501 can achieve synchronous adjustment at both ends (without affecting the falling of materials). Taking a single adjusting component 501 as an example, the adjusting component 501 includes a base 5011 and a lifting rod 5012. The base 5011 is installed inside the crushing chamber 300 (on the side wall) and located above each crushing area, that is, the base 5011 is located at a certain distance above the crushing area. The lifting rod 5012 is vertically telescopically connected to the base 5011, so that the lifting rod 5012 can move closer to or away from the crushing roller through vertical telescopic movement, so as to enable the partition component 502 to achieve connection and blockage.

[0034] The partition assembly 502 includes a connecting plate 5021 and multiple partition teeth 5022. The connecting plate 5021 is fixed between two lifting rods 5012 (in the same control assembly 500, between the lifting rods 5012 of the two adjusting components 501). The multiple partition teeth 5022 are arranged in parallel below the connecting plate 5021. Each partition tooth 5022 is used to retract or extend into the corresponding grinding tooth gap of the grinding roller, and is used to connect or block the corresponding grinding areas. It should be noted that there is a certain gap (5mm-10mm) between the partition teeth 5022 and the grinding tooth gap to avoid rigid collision. The number of partition teeth 5022 is adapted to the number of grinding tooth gaps of the grinding roller, which can block most or even all of the grinding tooth gaps, achieving a good blocking effect. Through the aforementioned technical solution, the lifting control of the lifting rod 5012 can be used to achieve the purpose of blocking and connecting the crushing areas. Based on this method, the lifting control drive point is located on the lifting rod 5012, and the extension and retraction control of the lifting rod 5012 can be achieved by means of pneumatic components, electric components or mechanical transmission mechanisms.

[0035] When independent crushing operations are required for each crushing zone, the two sets of control components 500 are isolated between the corresponding zones. At this time, the first crushing roller 401 and the second crushing roller 402 are started to rotate in opposite directions. The wet material in the second crushing zone 302 can be crushed, and the dry material is isolated and initially crushed at the partition tooth 5022. Then, the control components 500 are controlled to connect between the corresponding zones, and the dry material enters the second crushing zone 302 for crushing. Alternatively, the first crushing roller 401 and the second crushing roller 402 are controlled to rotate in opposite directions. The dry material in the first crushing zone 301 and the third crushing zone 303 is crushed. At this time, the wet material is isolated and initially crushed at the partition tooth 5022. Then, the first crushing roller 401 and the second crushing roller 402 are controlled to rotate in opposite directions to crush the wet material. In this way, the purpose of independent crushing at different points or sequential crushing at the same point can be achieved. Furthermore, if a filter cake forms within the pulverizing tooth gap, the isolation tooth 5022 needs to be controlled to block it. At this time, the isolation tooth 5022 will remove the filter cake from the pulverizing tooth gap (where the pulverizing roller rotates and contacts the isolation tooth 5022), thus achieving the purpose of cleaning the filter cake. Additionally, if a filter cake forms on the isolation tooth 5022 after prolonged contact with wet material, the lifting rod 5012 can be controlled to move vertically upwards. This will disengage the isolation tooth 5022 from the pulverizing tooth gap by a certain distance, allowing for filter cake removal and ensuring good operational safety.

[0036] Based on the above technical solutions, in addition to controlling the vertical extension and retraction of the lifting rod 5012 to achieve blocking, the degree of blocking can also be controlled by horizontal movement. Please refer to the following for details. Figure 3The base 5011 includes a first base 50111 and a second base 50112. The first base 50111 is fixedly connected to the crushing chamber 300 and serves as a fixed foundation. The lifting rod 5012 is vertically telescopically connected to the second base 50112 to achieve vertical lifting control. Furthermore, the first base 50111 and the second base 50112 are telescopically connected to each other, and the telescopic direction is perpendicular to the length direction of the crushing roller (horizontal direction). This allows the partition assembly 502 to move in a direction perpendicular to the length of the crushing roller, thus enabling it to approach or move away from the highest point of the crushing roller's inner diameter. This increases or decreases the gap between the partition teeth 5022 and the crushing tooth gap, thereby controlling the degree of obstruction or connection. This facilitates reducing the frequency or number of vertical lifting controls during crushing operations to achieve the purpose of obstruction and connection control.

[0037] Specifically, in this embodiment, the first substrate 50111 and the second substrate 50112 are telescopically connected by a sliding shaft 50113. The sliding shaft 50113 serves as a component for telescopically connecting the first substrate 50111 and the second substrate 50112, and its axial direction is perpendicular to the axial direction of the crushing roller, thereby allowing the first substrate 50111 and the second substrate 50112 to move closer or further apart relative to each other horizontally. Specifically, one end of the sliding shaft 50113 is fixedly connected to the second base 50112, and the other end slides through the first base 50111 (end protruding); in the same control component 500, a linkage rod 5013 is connected between the protruding ends of the two sets of sliding shafts 50113. The linkage rod 5013 is used to make the sliding shaft 50113 slide back and forth under the drive of external force, that is, the linkage rod 5013 can be moved by other external forces, thereby driving the sliding shaft 50113 to slide back and forth horizontally, and finally driving the partition component 502 to slide back and forth horizontally. This not only enables the control of the degree of blocking or connection, but also enables the function of blocking or connection without frequent control of the lifting rod 5012. Especially in continuous online operation, it can have the functional control basis of online non-stop operation, and it is easier to achieve convenient and automated operation without affecting the material feeding (at this time, the vertical extension and retraction control of the lifting rod 5012 can be more focused on the filter cake removal of the partition tooth 5022).

[0038] This embodiment also provides a coal pulverizing and processing device for thermal power generation, which includes a separation chamber 100, an air separation mechanism 200, and the pulverizing components described in the above embodiment. It should be noted that the pulverizing components here refer to the minimum component scheme in the above embodiment that can achieve the technical effect of "having a dry and wet separation crushing area, thereby reducing the impact of wet raw coal on dry raw coal and ensuring the crushing efficiency of dry raw coal".

[0039] Please refer to the details. Figure 4 and Figure 5The separation chamber 100 is located above the crushing chamber 300, meaning the separation chamber 100 and the crushing chamber 300 are arranged from top to bottom. The separation chamber 100 contains an air-separation area and a throwing area. The air-separation area provides space for the air separation of raw coal, while the throwing area, located between the crushing area and the air-separation area, provides space for the scattering of the separated raw coal, allowing different types of raw coal to enter their respective crushing areas. The air-separation mechanism 200 includes two sets of air-separation components. Along the line connecting the first crushing area 301 and the third crushing area 303, the two sets of air-separation components are located on opposite sides of the air-separation area, meaning they are located above the first crushing area 301 and the third crushing area 303, respectively. Both sets of air-separation components can perform air separation on the falling raw coal. Utilizing the principle that dry raw coal has a smaller mass and volume than wet raw coal, air is used to separate the two, resulting in raw coal with different moisture levels falling at their final positions along different parabolic paths, thus achieving the purpose of air separation.

[0040] Specifically, the central part of the air separation area serves as a coal feed inlet. Coal (raw coal) falls from the conveyor belt to this central location. The air separation components then use their blowing action to separate the coal at the feed inlet, causing wet coal to fall into the second crushing zone 302 and dry coal to fall (fly further) through the throwing zone into either the first crushing zone 301 or the third crushing zone 303. It should be noted that the two sets of air separation components do not create convective airflow, but rather generate wind in different directions to achieve coal separation within the coverage area. Alternatively, the two sets of air separation components can operate alternately.

[0041] The above technical solution enables the independent crushing of dry and wet materials by the crushing component, combined with the automatic dry and wet air separation function of falling raw coal, thereby achieving automated operation of feeding mixed raw coal into dry and wet raw coal for independent crushing. Compared with the previous method of using separate classification equipment and crushing separately, the equipment investment is smaller, the space is more intensive, and a higher crushing efficiency can be guaranteed.

[0042] In this embodiment, to further save equipment space, the air separation assembly adopts an alternating blowing method. This means that two sets of air separation assemblies can be symmetrically arranged for operation, rather than being staggered, which increases installation space requirements. Specifically, the air separation assembly includes an air compressor system and multiple sets of blowers 201. These blowers 201 are arranged along the length of the crushing roller on the side wall of the separation chamber 100, meaning they are arranged in a straight line above the first crushing area 301 or the third crushing area 303. The arrangement interval can be adaptively selected based on the wind force. The air compressor system simultaneously supplies air to the multiple sets of blowers 201, allowing the two sets of air separation assemblies to alternately separate the coal. When one set of air separation assemblies is blowing, the other set stops blowing, thus achieving alternating operation while ensuring the separation effect of the raw coal. This also allows both the first crushing area 301 and the third crushing area 303 to participate in the raw coal crushing operation.

[0043] Based on the above technical solution, considering that alternating air blowing can save installation space, but one set will blow air onto the opposite non-working blower 201 when it is working, there is a possibility that pulverized coal slag may be accidentally blown into the corresponding air inlet of the non-working blower 201, and the falling raw coal may also accidentally fall into the corresponding component of the blower 201. Therefore, the blower 201 needs to be protected.

[0044] Please refer to the details. Figure 5 The blower 201 includes a blower head 2012, a dust cover 2011, and a protective plate assembly 2013. The blower head 2012 is installed on the side wall of the separation chamber 100, and the air duct of the air supply system (not shown) is introduced from the side wall of the separation chamber 100 to the blower head 2012. The dust cover 2011 is installed above the blower head 2012 and is used to prevent coal from hitting the top of the blower head 2012. The dust cover 2011 can be in the shape of an eave with a convex center and a drooping edge, which not only provides protection but also facilitates the sliding of raw coal. The protective plate assembly 2013 has air screening holes for air passage and to achieve air separation. The protective plate assembly 2013 is installed in front of the air outlet of the blower head 2012 and is used to prevent a large amount of coal from entering the air outlet. That is, the protective plate assembly 2013 allows air to pass through while reducing the possibility of coal flying into the air outlet by arranging air screening holes.

[0045] The above technical solution achieves the initial protection of the blower head 2012. However, considering that coal ash entering the blower through the screen holes will still accumulate after a certain operating cycle, leading to insufficient maintenance intervals, in order to extend the maintenance and cleaning cycle of the blower head 2012 under continuous high-intensity operation, i.e., to reduce the possibility of accumulation at the blower opening, please refer to the following for details based on the above technical solution. Figure 6The protective plate assembly 2013 includes an outer protective plate 20131 and an inner protective plate 20133, which respectively provide primary and secondary protection for the air outlet. Specifically, the top of the outer protective plate 20131 is fixed to the dust cover 2011, for example, vertically fixed to the front end of the dust cover 2011, and the outer protective plate 20131 has a first air sieve hole 20132, which allows the air generated by the blower head 2012 to pass through; the inner protective plate 20133 is located between the blower head 2012 and the outer protective plate 20131, and the top of the inner protective plate 20133 is hinged to the dust cover 2011 (connected by a hinge), allowing the lower part of the inner protective plate 20133 to swing towards or away from the outer protective plate 20131.

[0046] The inner protective plate 20133 has a second screening hole 20134, which also allows the air generated by the blower head 2012 to pass through. When the lower part of the inner protective plate 20133 is acted upon by the blower head 2012, it moves closer to the outer protective plate 20131, so that the second screening hole 20134 is aligned with the first screening hole 20132, allowing the air to pass through; that is, the swinging inner protective plate 20133 swings closer to the outer protective plate 20131 under the action of the airflow, and when it reaches its maximum position, it is parallel to the outer protective plate 20131. At this time, the second screening hole 20134 and the first screening hole 20132 are located in the same horizontal direction (all corresponding points of the first screening hole 20132 and the second screening hole 20134 are aligned), so that the generated airflow can pass through the second screening hole 20134 and the first screening hole 20132, achieving the purpose of air separation. Conversely, the dust cover 2011 is provided with a reset device that acts on the inner protective plate 20133. The reset device (e.g., torsion spring, electric push rod) can act on the hinge to reset after it moves. When the function of the blower head 2012 is reduced or disappears, the reset device can make the lower part of the inner protective plate 20133 move away from the outer protective plate 20131 (swing towards the side away from the outer protective plate 20131), so that the second screen hole 20134 is misaligned with the first screen hole 20132, preventing a large amount of coal from entering the blower. That is, after the blower head 2012 on this side stops working, the second screen hole 20134 is misaligned with the first screen hole 20132, reducing the possibility of coal slag entering the blower of the non-working blower head 2012.

[0047] Through the above technical solution, not only is the purpose of fully protecting the non-working air separation component (avoiding accidental slag entry) achieved under the condition that the two sets of air separation components work alternately, but the inner protective plate 20133 also has the function of automatic selective protection. That is, the state change of the inner protective plate 20133 is achieved by using air force. This not only eliminates the need for additional automatic control costs, but also allows the inner protective plate 20133 to have different working states, so as to facilitate automatic switching control of dry and wet raw coal crushing operations under different working states.

[0048] Please refer to the specific details. Figures 1-6 At this time, the state switching of the inner protective plate 20133 can become the input power for the state switching of the control component 500. It should be noted that the control component 500 at this time refers to a crushing component with a first base 50111 and a second base 50112, and the first base 50111 and the second base 50112 are telescopically connected by a sliding shaft 50113. A linkage rod 5013 is connected between the extended ends of the two sets of sliding shafts 50113. At this time, the external force driving the linkage rod 5013 can come from the swing driving force of the inner protective plate 20133. Specifically, a trigger rod 2014 is provided at the bottom of the inner protective plate 20133. The trigger rod 2014 is connected to the linkage rod 5013 by transmission (e.g., telescopic hinge). When the trigger rod 2014 swings with the lower part of the inner protective plate 20133, it can cause the trigger rod 2014 to slide back and forth. Through the aforementioned technical solution, not only can the switching of the sliding position of the sliding shaft 50113 be achieved by changing the swing state of the inner protective plate 20133, thereby enabling the isolation tooth 5022 to move closer to or further away from the highest point of the inner diameter of the crushing roller in the horizontal direction, achieving the purpose of automatic control of the degree of blockage or connection, but this state linkage also utilizes the principle of determining whether a certain side of the crushing area needs to be blocked based on whether the blower head 2012 is working. That is, when the blower head 2012 on the side that is not working is working, the coal slag separated by air separation will fall into the crushing area below the blower head 2012 on the side that is not working. At this time, it is necessary to consider the formation of a blockage in the crushing area to prevent dry material from being carried to the wet material area for crushing, thereby affecting the overall crushing efficiency.

[0049] Based on the above technical solution, in order to achieve automated high-intensity continuous operation, this embodiment adopts a method of mutual linkage between air blowing control and crushing area isolation or connection control to adapt to the characteristics of automated continuous operation. Specifically, when the trigger rod 2014 swings inward with the lower part of the inner protective plate 20133 (swinging near the air blowing port, i.e., resetting), it can pull the trigger rod 2014 to slide away from the second crushing area 302, so that the partition tooth 5022 blocks the corresponding crushing area (at this time, the bottom of the partition tooth 5022 is close to the highest point of the inner diameter of the crushing roller), thereby achieving the blocking of the crushing area on the non-air blowing side; conversely, when the trigger rod 2014 swings outward with the lower part of the inner protective plate 20133 (swinging near the outer protective plate 20131, i.e., under the action of air blowing), it can push the trigger rod 2014 to slide towards the second crushing area 302, so that the partition tooth 5022 connects the corresponding crushing area and allows material to pass through (at this time, the bottom of the partition tooth 5022 is away from the highest point of the inner diameter of the crushing roller).

[0050] Thus, in automated operations, for example, when the air separation component on one side of the first crushing zone 301 starts blowing air for air separation, the wet raw coal with larger mass and volume falls to the second crushing zone 302, and the dry raw coal slag with smaller mass and volume falls to the third crushing zone 303. Since the blower head 2012 on one side of the third crushing zone 303 is not working, the trigger rod 2014 is away from the second crushing zone 302 and is in the reset state. The isolation tooth 5022 on this side blocks the corresponding crushing zones (that is, the bottom of the isolation tooth 5022 forms an obstruction near the highest point of the inner diameter of the crushing roller), so that the fallen dry raw coal and the fallen wet raw coal are independently separated from each other. At this time, the first crushing roller 401 and the second crushing roller 402 are controlled to rotate in opposite directions or in opposite directions to crush the dry raw coal or the wet raw coal first (of course, in different embodiments, several sets of crushing rollers can be designed to be controlled to crush at the same time). After crushing is completed, the other can be crushed in reverse. In this embodiment, to achieve high-speed continuous automation and reduce control costs, wet raw coal can be crushed first, while dry raw coal awaits crushing. Then, the blower head 2012 for the dry raw coal on this side starts operating. At this time, the trigger rod 2014 drives the bottom of the isolation tooth 5022 away from the highest point of the crushing roller's inner diameter, connecting the first / third crushing zone 303 on this side with the second crushing zone 302. The dry raw coal awaiting crushing then enters the second crushing zone 302 for further crushing. After crushing, the next round of air separation (intermittent coal feeding) and continuous crushing operations continue. Through the aforementioned control scheme, continuous automatic crushing operations can be achieved while maintaining low control and manufacturing costs for the first and second crushing rollers 401 and 402, especially suitable for high-intensity continuous crushing scenarios. Of course, in non-high-intensity continuous crushing scenarios, forward and reverse control of the crushing rollers can be used to achieve independent crushing of dry and wet raw coal.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes have been omitted to avoid unnecessarily limiting the invention.

Claims

1. A coal pulverizing and processing device for thermal power generation, characterized in that, include: The grinding chamber contains a first grinding zone, a second grinding zone, and a third grinding zone. The first grinding zone and the third grinding zone are located on both sides of the second grinding zone. The second grinding zone is used for grinding wet materials, while the first grinding zone and the third grinding zone are both used for grinding dry materials. The crushing mechanism is installed inside the crushing chamber and includes a first crushing roller, a second crushing roller, and two sets of side teeth, forming an integral form in which one set of side teeth, the first crushing roller, the second crushing roller, and the other set of side teeth mesh in sequence. A first crushing area, a second crushing area, and a third crushing area are formed between the first crushing roller, the second crushing roller, and the two sets of side teeth. Two sets of control components, one set of which is located between the second crushing region and the first crushing region and is used to selectively connect or block the two regions; the other set of control components is located between the second crushing region and the third crushing region and is used to selectively connect or block the two regions. The control assembly includes a partition assembly and two sets of adjusting components. Along the axial direction of the crushing roller, the two sets of adjusting components are located on both sides of the crushing chamber. Each adjusting component includes a base and a lifting rod. The base is installed inside the crushing chamber and located above each crushing area. The lifting rod is vertically telescopically connected to the base. The partition assembly includes a connecting plate and multiple partition teeth. The connecting plate is fixed between the two lifting rods. The multiple partition teeth are arranged in parallel below the connecting plate. Each partition tooth is used to exit or extend into the crushing tooth gap of the corresponding crushing roller and realize the connection or blockage between the corresponding crushing areas. The base includes a first base and a second base. The first base is fixedly connected to the crushing chamber. The lifting rod is vertically telescopically connected to the second base. The first base and the second base are telescopically connected to each other, and the telescopic direction is perpendicular to the length direction of the crushing roller, so that the partition assembly can move in a direction perpendicular to the length of the crushing roller. The first substrate and the second substrate are telescopically connected by a sliding shaft. One end of the sliding shaft is fixedly connected to the second substrate, and the other end slides through the first substrate. In the same control assembly, a linkage rod is connected between the extended ends of the two sets of sliding shafts. The linkage rod is used to make the sliding shaft slide back and forth under the drive of external force. It also includes a separation chamber and an air separation mechanism; the separation chamber is located above the crushing chamber, and an air separation area and a throwing area are formed in the separation chamber, with the throwing area located between the crushing area and the air separation area; the air separation mechanism includes two sets of air separation components, which are located on both sides of the air separation area along the line connecting the first crushing area and the third crushing area. The central part of the air separation area is used to form a coal feed inlet, and the air separation component is used to separate the coal at the feed inlet by air separation, so that wet coal falls into the second crushing area and dry coal falls into the first crushing area or the third crushing area through the throwing area. The air separation component includes an air compressor system and multiple blowers; the blower includes a blower head, a dust cover, and a protective plate assembly; the protective plate assembly includes an outer protective plate and an inner protective plate. A trigger rod is provided at the bottom of the inner protective plate. The trigger rod is connected to the linkage rod. When the trigger rod swings with the lower part of the inner protective plate, it can cause the trigger rod to slide back and forth.

2. The coal pulverizing and processing device for thermal power generation according to claim 1, characterized in that, The first crushing roller and the second crushing roller mesh with each other, and the two sets of side teeth mesh with the first crushing roller and the second crushing roller on opposite sides. The meshing area between the first crushing roller and the second crushing roller is connected to the second crushing area. The meshing area of ​​the first crushing roller and one set of side teeth is connected to the first crushing area. The meshing area of ​​the second crushing roller and the other set of side teeth is connected to the third crushing area.

3. The coal pulverizing and processing device for thermal power generation according to claim 1, characterized in that, Multiple sets of blowers are arranged along the length of the crushing roller on the side wall of the separation chamber. The air compression system is used to supply air to the multiple sets of blowers so that the two sets of air separation components can alternately separate the coal.

4. The coal pulverizing and processing device for thermal power generation according to claim 3, characterized in that, The blower head is installed on the side wall of the separation chamber, and the dust cover is installed above the blower head to prevent coal from hitting the top of the blower head; the protective plate assembly has air screening holes, and the protective plate assembly is installed in front of the air outlet of the blower head to prevent a large amount of coal from entering the air outlet.

5. The coal pulverizing and processing device for thermal power generation according to claim 4, characterized in that, The top of the outer protective plate is fixed to the dust cover, and the outer protective plate has a first air screening hole, which allows the air generated by the blower head to pass through. The inner protective plate is located between the blower head and the outer protective plate, and the top of the inner protective plate is hinged to the dust cover, allowing the lower part of the inner protective plate to swing towards or away from the outer protective plate. The inner protective plate has a second air screening hole, which moves closer to the outer protective plate when the lower part of the inner protective plate is acted upon by the blower head, so that the second air screening hole is aligned with the first air screening hole, allowing the air to pass through. The dust cover is provided with a reset device acting on the inner protective plate. When the action of the blower head is reduced or disappears, the reset device can move the lower part of the inner protective plate away from the outer protective plate, so that the second air screening hole is misaligned with the first air screening hole, preventing a large amount of coal from entering the blower opening.

6. The coal pulverizing and processing device for thermal power generation according to claim 1, characterized in that, When the trigger rod swings inward with the lower part of the inner protective plate, it can be pulled to slide away from the second crushing area, so that the partition teeth block the corresponding crushing areas; when the trigger rod swings outward with the lower part of the inner protective plate, it can be pushed to slide closer to the second crushing area, so that the partition teeth connect the corresponding crushing areas and allow the material to pass through.

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