Negative pressure dust removal system and raw coal crushing station with same

Abstract

The invention provides a negative pressure dust removal system and a raw coal crushing station with the same, the negative pressure dust removal system comprises a negative pressure dust collection system and a wet dust removal system for unloading, and efficient dust suppression is achieved through mechanical and pneumatic intelligent linkage; the long-strip air supply box generates a uniform air curtain to isolate air inside and outside the unloading hall, and the wet dust removal system forms a negative pressure environment; the reciprocating rotating frame rotates in a reciprocating mode to a certain degree and is matched with the driving exhaust fan for use, directional airflow is formed, dust is actively pushed to a top dust suction opening, meanwhile, a transmission mechanism drives a transverse flow guide screw to periodically rotate in a reciprocating mode, and alternate air supply is achieved in cooperation with two sets of air stations. According to the design, the equipment load is balanced, the service life is prolonged, and the continuity and stability of the air curtain are guaranteed; dust-containing air is captured into a dust scrubber and purified by water mist, and generated coal slime is pressed and filtered into mud cakes capable of being recycled. According to the system, through the three mechanisms of air curtain blocking, negative pressure adsorption and directional guiding, dust diffusion is remarkably restrained, and efficient and environment-friendly discharging operation is achieved.

Description

Technical Field

[0001] This invention relates to the field of dust control technology in raw coal processing, and particularly to a negative pressure dust removal system and a raw coal crushing station equipped with the system. Background Technology

[0002] Semi-mobile crushing plants are key equipment in the continuous mining process of large open-pit mines, and their performance directly affects production efficiency. Currently, the processing capacity of domestically produced semi-mobile coal crushing plants is generally below 3,000 tons / hour, and they face many bottlenecks in terms of overall structure and dust control. Firstly, their traditional reinforced concrete retaining wall infrastructure requires large investments and has a long construction period, making relocation extremely difficult, easily leading to serious waste, and lacking flexibility.

[0003] A more prominent issue is dust control. Existing systems mostly employ traditional methods such as baghouse dust collectors or spray dust collectors, neither of which are ideal. In the high temperatures of summer, baghouse dust collectors pose a serious "dust explosion" hazard due to the large accumulation of dry fly ash, posing an extremely high risk. While spray dust collectors can suppress dust to some extent, in the harsh winter, the water mist easily freezes, causing the system to malfunction and even affecting equipment safety. Both methods are constrained by seasonal and climatic conditions, failing to provide stable and reliable year-round dust control, resulting in harsh working environments and severe dust pollution. Summary of the Invention

[0004] One of the objectives of this invention is to provide a negative pressure dust removal system that, through a triple mechanism of "air curtain barrier, negative pressure adsorption, and directional guidance," can significantly suppress dust diffusion and achieve efficient and environmentally friendly unloading operations.

[0005] The objective of this invention is achieved through the following technical solution: a negative pressure dust removal system, comprising a negative pressure dust collection system for unloading and collecting dust, the negative pressure dust collection system comprising an unloading hall, an exhaust fan, an air inlet pipe seat, and a transverse guide screw.

[0006] Vehicle passages are provided on the three adjacent sides of the unloading hall. A long air supply box is fixed at the top of each set of vehicle passages. A reciprocating frame that can rotate back and forth within a certain range is provided at the top of the unloading hall. Exhaust fans are evenly installed on the side frame of the reciprocating frame.

[0007] The unloading hall is equipped with a pair of wet dust removal systems for unloading. The inlet of the wet dust removal system for unloading is connected to the top of the unloading hall through the unloading dust collection pipe. The top of the reciprocating rotating frame is also connected with a pair of cleaning brushes.

[0008] Rollers are evenly screwed onto the inner top of the unloading hall, and all rollers are in contact with and rub against the outer circumferential surface of the top of the reciprocating rotating frame.

[0009] Each set of wet dust removal systems for unloading is equipped with an air station on the outside. The long air supply box is equipped with evenly distributed air guides. The lower inner end of the evenly distributed air guides is fixed with partition plates. The air inlet pipe seats are connected in pairs at the top inlet position of the evenly distributed air guides. The transverse guide screws are horizontally screwed to the upper inner end of the evenly distributed air guides. Each set of transverse guide screws is coaxially connected and driven by the rollers on the same side. The air inlet pipe seats on both sides of the top of the evenly distributed air guides are connected to different air stations. Within the periodic range of the reciprocating rotation of the reciprocating frame, the two sets of air stations can supply air to the inner cavity of the evenly distributed air guides independently.

[0010] The process of using the technical solution of the present invention is as follows:

[0011] Each vehicle aisle in the unloading hall has a long strip of air supply box installed at the top, which can spray a curtain of air downwards;

[0012] The wet dust collection system for unloading consists of a negative pressure dust collector, a dust collector, a filter press, and a sludge discharge device. It is used to create negative pressure inside the unloading hall and to treat the adsorbed dust. The specific treatment process is as follows:

[0013] After the wet dust collection system for unloading is started, a powerful fan generates a strong negative pressure. Under the action of negative pressure, the air containing coal dust is quickly drawn in from the unloading dust collection pipe and transported to the dust scrubber.

[0014] Dust-laden air drawn in from the dust collection point enters the dust scrubber at high speed. Inside the dust scrubber is a high-speed rotating impeller, which not only assists the fan in generating a stronger airflow, but also disperses the water jet sprayed from the water supply system, forming an extremely fine water mist. When the dust-laden air mixes and collides fully with this fine water mist, the tiny coal dust particles are moistened and encapsulated by the water mist. The captured coal dust combines with the water, increases in weight, separates from the airflow, and settles to the bottom of the dust scrubber, forming coal slurry water.

[0015] The coal slurry water accumulated at the bottom of the dust collector is pumped into the filter press. The coal slurry water is subjected to high pressure, which forces the water to seep out through the filter cloth, while the solid coal powder particles are trapped on the filter cloth, gradually forming multiple mud cakes with low water content.

[0016] The solid mud cake formed after pressure filtration has a certain degree of hardness, and these mud cakes are collected by a mud discharger.

[0017] Furthermore, when the reciprocating frame rotates back and forth within a certain range, the array of exhaust fans installed in the reciprocating frame can form a 360° coverage, creating a directional airflow field within the unloading hall. The guiding effect of the airflow field can push the dust raised during vehicle unloading towards the inlet of the unloading dust collection pipe in the center of the top of the unloading hall, greatly improving the dust collection efficiency.

[0018] When the reciprocating frame rotates back and forth within a certain range, it will drive the rollers that are rolled and connected to the outer circumference of the top of the reciprocating frame to form a periodic forward and reverse rotation. The rollers can drive the transverse guide screw to rotate forward and reverse within a certain period through the transmission mechanism. The air inlet pipe seats located on both sides of the top of the equal distribution air guide head are connected to different air stations respectively. Within the period of forward and reverse rotation of the transverse guide screw, the two sets of air stations can supply air to the inner cavity of the equal distribution air guide head separately.

[0019] When a set of air inlet pipe seats at the top of the equal-distribution air guide head supplies air to the inner cavity of the equal-distribution air guide head, the transverse guide screw forms a conveying action away from the set of air inlet pipe seats, which can form a transverse conveying of the gas entering the interior of the equal-distribution air guide head. The partition plates arranged inside the equal-distribution air guide head can divide the gas, so that the gas can be divided by the partition plates and enter the inner cavity of the long strip air supply box laterally and evenly, and blown downward through the narrow gap at the bottom of the long strip air supply box, forming a uniform and stable air curtain.

[0020] Another objective of this invention is to provide a raw coal crushing station, which further includes a steel structure retaining wall, a steel unloading hopper, a steel unloading platform, a steel support frame, a crusher, a plate feeder, and a crushing dust collection pipeline. The steel structure retaining wall includes modular steel plates, and the crusher includes a crusher shell. The steel structure retaining walls are symmetrically distributed on both sides below the negative pressure dust collection system. The main body of the unloading wet dust removal system and the air station are fixedly installed in the frame on top of the steel structure retaining wall. The main body is composed of multiple modular steel plates connected by bolts. Each group of steel structure retaining walls has a tie rod connected to one side. The end of the tie rod is anchored to a pre-set foundation to provide anti-overturning stability.

[0021] The steel unloading silo has a funnel-shaped structure. The steel unloading platforms are arranged around the steel unloading silo as the center, and the positions of the steel unloading platforms on the same side are directly opposite the positions of the vehicle passages. The bottom frame of the steel unloading silo is fixedly connected to the foundation. The steel support frame is connected to the frame on the other side of the steel structure retaining wall, and the bottom of the steel support frame is fixed to the foundation.

[0022] The outer frame of the crusher shell is fixedly connected to the inner frame of the steel support frame. The plate feeder is laid between the bottom of the steel unloading hopper and the inlet of the crusher shell, which can continuously transport the raw coal in the steel unloading hopper to the crusher shell. Pairs of crushing reduction motor units are fixedly installed on the outside of the main body of the crusher shell. Pairs of crushing toothed rollers are screwed to the bottom of the inner side of the crusher shell. The rotating shaft of the crushing toothed roller on the same side is connected to the output end of the crushing reduction motor unit, which can perform efficient crushing of raw coal.

[0023] The inner frame of the steel support frame is also equipped with a wet dust removal system for crushing. The inlet end of the wet dust removal system for crushing is connected to the inner cavity of the crusher shell through the crushing dust collection pipe to treat the dust generated during the crushing process.

[0024] By adopting the above technical solution, the present invention can achieve the following beneficial effects:

[0025] (1) The synergistic effect of the air curtain and negative pressure in this invention can achieve efficient dust suppression and isolation. The continuous and uniform high-speed air curtain generated by the long strip air supply box effectively blocks the free exchange of air inside and outside the unloading hall, prevents the external airflow from disturbing the internal dust, and also inhibits the escape of the internal dust-laden air. The wet dust removal system for unloading forms a negative pressure environment in the unloading hall, which, together with the air curtain, forms an isolation zone, so that the dust is firmly confined inside the unloading operation area of ​​the unloading hall, creating a prerequisite for subsequent efficient dust collection.

[0026] (2) The reciprocating rotation of the reciprocating frame drives the array of exhaust fans to form a 360° covered directional airflow field. The core function of this airflow field is to actively push the dust raised to the top unloading dust collection pipe inlet, changing the passive waiting for dust to spread to the active guidance and collection, which greatly improves the dust collection efficiency.

[0027] (3) The rotation of the reciprocating frame drives the transverse guide screw to rotate periodically in both directions through rollers and transmission mechanism. This ingenious design enables the alternating use of the two sets of gas stations, allowing the two sets of gas stations to work in turn, avoiding overheating and wear caused by continuous operation of a single gas station. The system has higher reliability and the service life of the equipment is extended. Moreover, through the directional conveying of the transverse guide screw and the diversion of the partition plate, regardless of which set of gas stations supplies gas, it can ensure that the gas is evenly and stably distributed to the long strip air box, forming an uninterrupted stable air curtain. This design ensures the continuity and stability of the dust suppression effect.

[0028] (4) The wet dust removal system for unloading (dust collection, dust washing, filter pressing, and sludge discharge) constitutes a complete closed-loop treatment process. After the dust-laden air is captured by water mist, the coal slurry water is filtered into solid mud cakes. This not only achieves the complete removal of dust, but also converts coal powder into low-calorific-value fuel with economic value or solids that are easy to dispose of in compliance with regulations, realizing the resource utilization of waste, avoiding secondary pollution, and meeting the requirements of green environmental protection. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a structural schematic diagram of the unloading hall and steel unloading platform of the present invention;

[0032] Figure 3 This is a schematic diagram showing the installation positions of the reciprocating rotating frame and the unloading hall of the present invention;

[0033] Figure 4 This is a schematic diagram of the reciprocating rotating frame of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of the rotating disk part of the present invention;

[0035] Figure 6 This is a front view of the reciprocating rotating frame portion of the present invention;

[0036] Figure 7 This is a schematic diagram of the transmission structure of the roller and the overlapping shaft of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the evenly distributed air guide head part of the present invention;

[0038] Figure 9 This is a schematic diagram of the transverse guide screw portion of the present invention;

[0039] Figure 10 This is a schematic diagram showing the positional relationship between the steel unloading hopper and the crusher section of the present invention;

[0040] Figure 11 This is a schematic diagram of the installation of the crusher part of the present invention;

[0041] Figure 12 This is a schematic diagram of the structure of the crusher of the present invention;

[0042] Figure 13 This is a schematic diagram of the structure of the wet dust removal system for crushing in this invention;

[0043] Figure 14 This is a schematic diagram illustrating the working principle of the wet dust removal system of the present invention.

[0044] Figure label:

[0045] 1. Negative pressure dust collection system; 2. Steel unloading hopper; 3. Steel unloading platform; 4. Steel structure retaining wall; 5. Steel support frame; 6. Crusher; 7. Plate feeder; 8. Wet dust collection system for unloading; 9. Wet dust collection system for crushing; 10. Dust collection pipeline for unloading; 11. Dust collection pipeline for crushing; 12. Air station;

[0046] 101. Unloading Hall; 102. Internal Support Steel Frame; 103. Vehicle Access; 104. Long Strip Air Supply Box; 105. Reciprocating Rotary Frame; 106. Exhaust Fan; 107. Fixed Rotary Seat; 108. Central Shaft; 109. Roller Rotary Seat; 110. Roller; 111. Cleaning Brush; 112. Connecting Frame; 113. Drive Fixed Plate; 114. Reciprocating Rotary Arm; 115. Rotary Disc; 116. Gear Motor Set; 117. Eccentric Roller; 18. Protective cover; 119. Central shaft; 120. Central shaft rotating seat; 121. Coaxial bevel gear; 122. Transmission bevel gear; 123. Hanging seat; 124. Long shaft; 125. Evenly distributed air guide head; 126. Cover plate; 127. Overlapping shaft; 128. Air guide bevel gear; 129. Air guide connecting bevel gear; 130. Air inlet pipe seat; 131. Transverse guide screw; 132. Partition plate; 133. Inner rotating seat; 134. Overlapping seat;

[0047] 401. Modular steel plate; 402. Tie rod;

[0048] 601. Crusher casing; 602. Crusher geared motor unit; 603. Crusher toothed roller. Detailed Implementation

[0049] 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, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] like Figures 1-14As shown, a negative pressure dust removal system and a raw coal crushing station with the system are disclosed. In the negative pressure dust collection system 1, vehicle passages 103 are provided on three adjacent sides of the unloading hall 101. A long strip air supply box 104 is fixed at the upper end of each set of vehicle passages 103. A reciprocating frame 105 that can reciprocate within a certain range is provided at the inner top of the unloading hall 101. Exhaust fans 106 are evenly installed on the side frame of the reciprocating frame 105. As the reciprocating frame 105 reciprocates within a certain range, the sets of exhaust fans 106 can form a 360° coverage, and the exhaust fans 106 have a certain downward tilt angle.

[0052] A pair of wet dust removal systems 8 for unloading are provided at the rear of the unloading hall 101. The inlet of the wet dust removal system 8 for unloading is connected to the top of the unloading hall 101 through the unloading dust collection pipe 10, which can form a negative pressure suction on the inner cavity of the unloading hall 101. A pair of cleaning brushes 111 are also connected to the top of the reciprocating frame 105, and the cleaning brushes 111 on the same side can form contact friction with the inlet of the unloading dust collection pipe 10.

[0053] Rollers 110 are evenly screwed onto the inner top of the unloading hall 101, and all rollers 110 are in contact with and rub against the outer circumferential surface of the top of the reciprocating frame 105.

[0054] Each set of wet dust removal systems 8 for unloading is equipped with an air station 12 on the outside. The long strip air supply box 104 is equipped with evenly distributed air guides 125. The lower inner end of the evenly distributed air guide 125 is fixed with a partition plate 132. The inner cavity of the evenly distributed air guide 125 is connected to the inner cavity of the long strip air supply box 104. The air inlet pipe seats 130 are connected in pairs at the top inlet position of the evenly distributed air guide 125. The transverse guide screw 131 is transversely screwed to the upper inner end of the evenly distributed air guide 125. Each set of transverse guide screws 131 is coaxially connected and driven by the roller 110 on the same side. The air inlet pipe seats 130 located on both sides of the top of the evenly distributed air guide 125 are connected to different air stations 12 respectively. Within the periodic range of the reciprocating rotating frame 105, the two sets of air stations 12 can supply air to the inner cavity of the evenly distributed air guide 125 separately.

[0055] The working principle is as follows:

[0056] The long strip air supply box 104 installed at the top of each vehicle channel 103 in the unloading hall 101 can spray a curtain of air downwards. This is because the air outlet at the bottom of the long strip air supply box 104 is a narrow slit, which can blow out a uniform and continuous high-speed air curtain downwards, effectively blocking the large-scale convection exchange of air inside and outside the unloading hall 101.

[0057] The wet dust removal system 8 for unloading consists of a negative pressure dust collector, a dust collector, a filter press, and a sludge discharger. All components—the negative pressure dust collector, dust collector, filter press, and sludge discharger—are existing technologies. They are used to create a negative pressure inside the unloading hall 101 and to treat the adsorbed dust. The specific treatment process is as follows:

[0058] After the unloading wet dust removal system 8 is started, a powerful negative pressure is generated by a high-power fan. Under the action of negative pressure, the air containing coal dust is quickly drawn into the unloading dust collection pipe 10 and transported to the dust scrubber. This step ensures that the coal dust is effectively captured before it spreads to the entire working space.

[0059] Dust-laden air drawn in from the dust collection point enters the dust scrubber at high speed. Inside the dust scrubber is a high-speed rotating impeller, which not only assists the fan in generating a stronger airflow, but also disperses the water jet sprayed from the water supply system, forming an extremely fine water mist. When the dust-laden air mixes and collides fully with this fine water mist, the tiny coal dust particles are moistened and encapsulated by the water mist. Due to the high relative velocity between the dust particles and water droplets, they are effectively captured by the water droplets due to inertial impact and diffusion effects. The captured coal dust combines with water, increases in weight, separates from the airflow, and settles to the bottom of the dust scrubber, forming coal slurry water.

[0060] The coal slurry water accumulated at the bottom of the dust collector is pumped into the filter press. The coal slurry water is subjected to high pressure, which forces the water to seep out through the filter cloth, while the solid coal powder particles are trapped on the filter cloth, gradually forming multiple mud cakes with low water content.

[0061] The solid mud cake formed after pressure filtration has a certain hardness, making it easy to transport and handle. These mud cakes are collected by a mud discharge device. The collected mud cakes can be reused as low-calorific-value fuel or transported to a designated site for compliant landfill, thus avoiding secondary pollution from solid waste.

[0062] Furthermore, when the reciprocating frame 105 rotates back and forth within a certain range, the array of exhaust fans 106 installed in the reciprocating frame 105 can form a 360° coverage, which can create a directional airflow field in the unloading hall 101. The guiding effect of the airflow field can push the dust raised when the vehicle is unloading towards the inlet of the unloading dust collection pipe 10 at the top center of the unloading hall 101, which greatly improves the dust collection efficiency. Moreover, the strong directional airflow formed can effectively suppress the tendency of dust to spread towards the vehicle passage 103.

[0063] When the reciprocating frame 105 reciprocates within a certain range, it will drive the roller 110, which is rolled and connected to the outer circumferential surface of the top of the reciprocating frame 105, to form a periodic forward and reverse rotation. The roller 110 can drive the transverse guide screw 131 to rotate forward and reverse within a certain period through the transmission mechanism. The air inlet pipe seats 130 located on both sides of the top of the equal distribution air guide head 125 are respectively connected to different air stations 12. Within the period of forward and reverse rotation of the transverse guide screw 131, the two sets of air stations 12 can supply air to the inner cavity of the equal distribution air guide head 125 separately.

[0064] When the set of air inlet pipe seats 130 at the top of the equal distribution air guide head 125 supplies air to the inner cavity of the equal distribution air guide head 125, the transverse guide screw 131 forms a conveying action away from the set of air inlet pipe seats 130, which can form a transverse conveying of the gas entering the interior of the equal distribution air guide head 125. The partition plates 132 arranged inside the equal distribution air guide head 125 can divide the gas, so that the gas can be divided by the partition plates 132 and enter the inner cavity of the long strip air supply box 104 in a transverse and uniform manner, and blown out downward through the narrow gap at the bottom of the long strip air supply box 104 to form a uniform and stable air curtain.

[0065] This creates a triple protection mechanism consisting of "air curtain physical barrier + negative pressure adsorption + directional airflow guidance". The powerful directional airflow field can effectively suppress the tendency of dust to spread to vehicle passage 103, significantly improve the working environment at the entrance area of ​​unloading hall 101, and enhance the overall operational safety.

[0066] The specific structure of the negative pressure dust collection system 1 is as follows: Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the unloading hall 101 is covered by the outer side of the inner support steel frame 102. The inner support steel frame 102 supports the unloading hall 101. A fixed rotating seat 107 is fixed at the top center of the inner support steel frame 102. A central shaft 108 is fixed at the middle of the frame of the reciprocating rotating frame 105. The central shaft 108 is spun to the fixed rotating seat 107 and can drive the reciprocating rotating frame 105 to rotate safely and stably relative to the fixed rotating seat 107. Roller rotating seats 109 are evenly fixed at the top of the inner support steel frame 102. The rotating shaft of the roller 110 is spun to the inner end of the roller rotating seat 109. Connecting frames 112 are fixed on both sides of the top of the reciprocating rotating frame 105. The bottom of the main body of the cleaning brush 111 is fixedly connected to the top of the connecting frame 112. Within the range of the reciprocating rotation of the reciprocating rotating frame 105, the connecting frame 112 and the cleaning brush 111 will not interfere with the top of the inner support steel frame 102.

[0067] The drive plate 113 is fixedly connected to the top center of the inner support steel frame 102 and will not interfere with the rotation of the central shaft 108. The top of the central shaft 108 is fixedly connected to the reciprocating rotary arm 114. The central shaft seat 120 is installed and fixed in the main body of the drive plate 113. The bottom center of the rotary disk 115 is fixedly connected to the central shaft 119. The central shaft 119 is spun to the central shaft seat 120. The top of the rotary disk 115 is eccentrically spun to the eccentric roller 117. The eccentric roller 117 is tumbling connected in the groove of the reciprocating rotary arm 114. The geared motor 116 is installed and fixed at the bottom of the drive plate 113. The bottom of the central shaft 119 is connected to the output shaft of the geared motor 116.

[0068] After starting the geared motor 116, it can drive the central shaft 119 and the rotary table 115 to rotate slowly. The rotary table 115 drives the eccentric roller 117 to rotate eccentrically relative to the central shaft 119. By utilizing the rolling connection formed by the eccentric roller 117 and the groove of the reciprocating arm 114, the reciprocating arm 114 can be driven to swing back and forth within a certain range. This can drive the central shaft 108 and the reciprocating frame 105 to rotate slowly back and forth within a certain range with the fixed base 107 as the reference. With the rolling connection formed by the evenly distributed rollers 110 and the outer circumference of the top of the reciprocating frame 105, the reciprocating frame 105 can form a safe and stable reciprocating rotation action.

[0069] A coaxial bevel gear 121 is inserted into the top of the roller 110 shaft. A transmission bevel gear 122 meshes with one side of the coaxial bevel gear 121. Hangers 123 are fixedly installed at the inner top of the unloading hall 101, directly opposite each set of vehicle passages 103. A long shaft 124 is screwed onto the bottom of the hanger 123. The transmission bevel gear 122 is inserted into the inner end of the long shaft 124. A guide bevel gear 129 is inserted into the outer end of the long shaft 124. A cover plate 126 covers the top opening of the equal-distribution air guide head 125. Inner... The two ends of the transverse guide screw 131 are respectively screwed into different inner rotating seats 133. The overlapping seats 134 are fixed at both ends of the transverse guide screw 131, and the overlapping seats 134 are located outside the evenly distributed air guide head 125, so as not to affect the rotation of the transverse guide screw 131. An overlapping shaft 127 is inserted and fixed between two adjacent sets of overlapping seats 134, and the array of overlapping shafts 127 located at the top of the same long strip air box 104 are coaxial. The air guide bevel gear 128 is inserted into one set of overlapping shafts 127 and meshes with the air guide connecting bevel gear 129.

[0070] When the roller 110 rotates periodically, it can drive the coaxial bevel gear 121 and the transmission bevel gear 122 to form a transmission. The transmission bevel gear 122 drives the air guide connecting bevel gear 129 and the air guide bevel gear 128 to form a transmission through the long shaft 124, forming a reciprocating rotation of the overlapping shaft 127, thereby forming the reciprocating rotation of each set of transverse guide screws 131.

[0071] Limit switches can be installed at the extreme positions of the reciprocating rotation of the reciprocating frame 105. The limit switches can automatically control the valves that connect each group of gas stations 12 to the inner cavity of the equal distribution air guide head 125, so that the two groups of gas stations 12 can alternately supply air to the inner cavity of the equal distribution air guide head 125, forming a state in which the two gas stations 12 work in turn.

[0072] Furthermore, the outer circumferential surface of the top of the reciprocating frame 105 and the outer surface of the roller 110 have uniform rough surfaces, and the transmission torque they form is sufficient to drive the rotation of each set of transverse guide screws 131 through the transmission mechanism. This is because the geared motor set 116 that drives the reciprocating frame 105 to rotate back and forth has sufficient torque.

[0073] A protective cover 118 is also attached to the outside of a set of connecting frames 112 corresponding to the swivel 115 to protect the swivel 115 and its transmission mechanism and reduce dust pollution. Similarly, a protective cover that does not interfere with the transmission is also provided on the transmission mechanism formed between the coaxial bevel gear 121 and the lap shaft 127 to reduce dust pollution.

[0074] The specific structures of the steel structure retaining wall 4, steel unloading hopper 2, steel unloading platform 3, steel support frame 5, crusher 6, plate feeder 7, wet dust collection system for crushing 9, and crushing dust collection pipeline 11 are as follows: Figure 1 , Figure 2 , Figure 3 , Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown, the main bodies of the unloading wet dust removal system 8 and the air station 12 are symmetrically distributed on both sides below the negative pressure dust collection system 1. They are all fixedly installed in the frame on the top of the steel structure retaining wall 4. The main body is composed of an array of modular steel plates 401 connected to the steel frame by bolts. Each group of steel structure retaining walls 4 has a tie rod 402 connected to one side. The end of the tie rod 402 is anchored on a pre-set foundation, which can provide anti-overturning stability.

[0075] Because thousands of tons of raw coal are piled behind the steel retaining wall 4, this material will exert a huge outward horizontal thrust on the retaining wall 4, attempting to push it forward and overturn it. One end of the tie rod 402 is firmly connected to the steel structural column or main load-bearing frame of the retaining wall 4, while the other end is anchored to a more stable and stronger foundation behind it (e.g., a deep concrete foundation pile or a large concrete block). When the coal pile pushes the retaining wall 4, the tie rod 402 is subjected to tension, which generates a counter-torque that effectively balances the overturning moment, thereby ensuring the stability of the retaining wall 4.

[0076] The steel unloading hopper 2 has a funnel-shaped structure. The steel unloading platforms 3 are arranged around the steel unloading hopper 2, and the positions of the steel unloading platforms 3 on the same side are directly opposite the positions of the vehicle passage 103. The bottom frame of the steel unloading hopper 2 is fixedly connected to the foundation. The steel unloading platforms 3 are used to carry unloading vehicles. The steel unloading hopper 2 is used to receive the unloaded raw coal. The steel support frame 5 is connected to the frame on the other side of the steel structure retaining wall 4, and the bottom of the steel support frame 5 is fixed to the foundation.

[0077] Crusher 6 is a PG1840 type large double toothed roll crusher. The outer frame of the crusher shell 601 is fixedly connected to the inner frame of the steel support frame 5. The plate feeder 7 is laid between the bottom of the steel unloading bin 2 and the inlet of the crusher shell 601. Specifically, it is a 3m wide heavy-duty plate feeder that can continuously transport the raw coal in the steel unloading bin 2 to the crusher shell 601. A pair of crushing reduction motor units 602 are fixedly installed on the outside of the main body of the crusher shell 601. A pair of crushing toothed rolls 603 are screwed to the bottom of the inner side of the crusher shell 601. The rotating shaft of the crushing toothed roll 603 on the same side is connected to the output end of the crushing reduction motor unit 602, which can perform efficient crushing of raw coal.

[0078] The inlet end of the wet dust collection system 9 for crushing is connected to the inner cavity of the crusher shell 601 through the crushing dust collection pipe 11. The wet dust collection system 9 for crushing is also composed of a negative pressure dust collector, a dust collector, a filter press and a mud discharger. It is used to create a negative pressure inside the crusher shell 601 and to treat the dust generated during the crushing process. It will not be described in detail here.

[0079] Furthermore, all components of the wet dust removal system 8 for unloading and the wet dust removal system 9 for crushing are integrated into a prefabricated cabin with thermal insulation function, and the external sludge discharge pipe connected to the sludge discharge device is insulated to ensure normal use in winter.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure dust removal system, comprising a discharge dust collection pipe (10), characterized in that: It also includes a negative pressure dust collection system (1); The negative pressure dust collection system (1) includes an unloading hall (101), an exhaust fan (106), an air inlet duct seat (130), and a transverse guide screw (131); A pair of wet dust collection systems (8) for unloading are installed at the rear of the unloading hall (101). The inlet of the wet dust collection system (8) for unloading is connected to the top of the unloading hall (101) through the unloading dust collection pipe (10). Vehicle passages (103) are opened in the three adjacent sides of the unloading hall (101). A long strip air supply box (104) is fixed at the upper end of each set of vehicle passages (103). A reciprocating rotating frame (105) is provided at the inner top of the unloading hall (101). Exhaust fans (106) are evenly installed in the side frame of the reciprocating rotating frame (105). A pair of cleaning brushes (111) are also connected to the top of the reciprocating rotating frame (105). Rollers (110) are evenly screwed onto the inner top of the unloading hall (101), and the rollers (110) are in contact and rub against the outer circumferential surface of the top of the reciprocating rotating frame (105). Each of the wet dust removal systems (8) for unloading is equipped with an air station (12). A uniform air distribution head (125) is installed inside the long air supply box (104). A partition plate (132) is fixed at the lower inner end of the uniform air distribution head (125). The air inlet pipe seat (130) is connected in pairs to the top of the uniform air distribution head (125). The transverse guide screw (131) is horizontally screwed to the upper inner end of the uniform air distribution head (125). Each set of transverse guide screws (131) is coaxially connected and driven by the roller (110) on the same side. The air inlet pipe seats (130) on both sides of the top of the uniform air distribution head (125) are connected to different air stations (12). Within the periodic range of the reciprocating rotating frame (105), the two sets of air stations (12) can supply air to the inner cavity of the uniform air distribution head (125) separately.

2. The negative pressure dust removal system according to claim 1, characterized in that: The negative pressure dust collection system (1) also includes an inner support steel frame (102), the unloading hall (101) is covered on the outside of the inner support steel frame (102), a fixed rotating seat (107) is fixed at the top center of the inner support steel frame (102), a central shaft (108) is fixed at the middle of the frame of the reciprocating rotating frame (105), the central shaft (108) is screwed to the fixed rotating seat (107), a roller rotating seat (109) is evenly fixed at the top of the inner support steel frame (102), and the rotating shaft of the roller (110) is screwed to the inner end of the roller rotating seat (109); a connecting frame (112) is fixed on both sides of the top of the reciprocating rotating frame (105), the bottom of the main body of the cleaning brush (111) is fixedly connected to the top of the connecting frame (112), and within the range of the reciprocating rotation of the reciprocating rotating frame (105).

3. The negative pressure dust removal system according to claim 2, characterized in that: The negative pressure dust collection system (1) also includes a drive plate (113), a rotary disc (115), and a geared motor assembly (116). The drive plate (113) is fixedly connected to the top center of the inner support steel frame (102). A reciprocating rotary arm (114) is fixedly connected to the top of the central shaft (108). A central shaft seat (120) is installed and fixed in the main body of the drive plate (113). A central shaft (119) is fixed to the bottom center of the rotary disc (115). The central shaft (119) is spun to the central shaft seat (120). An eccentric roller (117) is eccentrically spun to the top of the rotary disc (115). The eccentric roller (117) is tumblingly connected in the groove of the reciprocating rotary arm (114). The geared motor assembly (116) is installed and fixed to the bottom of the drive plate (113). The bottom of the central shaft (119) is connected to the output shaft of the geared motor assembly (116).

4. A negative pressure dust removal system according to claim 1, 2 or 3, characterized in that: The negative pressure dust collection system (1) also includes a coaxial bevel gear (121), a transmission bevel gear (122), a long shaft (124), a cover plate (126), a guide bevel gear (128), and a connecting seat (134). The coaxial bevel gear (121) is inserted into the top of the roller (110) shaft, and the transmission bevel gear (122) meshes with one side of the coaxial bevel gear (121). Hanging seats (123) are fixedly installed at the inner top of the unloading hall (101) and directly opposite each set of vehicle passages (103). The long shaft (124) is screwed onto the bottom end of the hanging seat (123), and the transmission bevel gear (122) is inserted into the inner end of the long shaft (124). The outer end of the shaft (124) is inserted with a guide bevel gear (129), and the cover plate (126) is attached to the top of the equal distribution guide head (125). Each set of equal distribution guide heads (125) has an inner rotating seat (133) installed and fixed on both sides of the top. The two shaft ends of the transverse guide screw (131) are respectively screwed into different inner rotating seats (133). The overlapping seat (134) is fixed at both ends of the transverse guide screw (131). An overlapping shaft (127) is inserted and fixed between two adjacent sets of overlapping seats (134). The guide bevel gear (128) is inserted into one of the overlapping shafts (127) and meshes with the guide bevel gear (129).

5. A raw coal crushing station, comprising a negative pressure dust removal system as described in any one of claims 1 to 4, characterized in that: It also includes steel structure retaining walls (4), which include modular steel plates (401). The steel structure retaining walls (4) are symmetrically distributed on both sides below the negative pressure dust collection system (1). The main bodies of the unloading wet dust removal system (8) and the air station (12) are fixedly installed in the frame on the top of the steel structure retaining walls (4). The main body is composed of multiple modular steel plates (401) connected based on the steel structure frame. Each set of steel structure retaining walls (4) has a tie rod (402) connected to one side.

6. A raw coal crushing station according to claim 5, characterized in that: It also includes a steel unloading hopper (2), a steel unloading platform (3) and a steel support frame (5). The steel unloading hopper (2) has a funnel-shaped structure. The steel unloading platform (3) is arranged around the steel unloading hopper (2) as the center, and the position of the steel unloading platform (3) on the same side is directly opposite the position of the vehicle passage (103). The steel support frame (5) is connected to the frame on the other side of the steel structure retaining wall (4).

7. A raw coal crushing station according to claim 6, characterized in that: It also includes a crusher (6), a plate feeder (7) and a crushing dust collection pipe (11). The crusher (6) includes a crusher shell (601). The outer frame of the crusher shell (601) is fixedly connected to the inner frame of the steel support frame (5). The plate feeder (7) is laid between the bottom end of the steel unloading bin (2) and the inlet of the crusher shell (601). A pair of crushing reduction motor units (602) are fixedly installed on the outside of the main body of the crusher shell (601). A pair of crushing toothed rollers (603) are screwed to the bottom of the inner end of the crusher shell (601). The rotating shaft of the crushing toothed roller (603) on the same side is connected to the output end of the crushing reduction motor unit (602).

8. A raw coal crushing station according to claim 7, characterized in that: The inner frame of the steel support frame (5) is also equipped with a wet dust removal system (9) for crushing. The inlet end of the wet dust removal system (9) for crushing is connected to the inner cavity of the crusher shell (601) through the crushing dust collection pipe (11). The wet dust removal system (9) for crushing is also composed of a negative pressure dust collector, a dust collector, a filter press and a mud discharger.

Images