Coal preparation processing system in coking process
By adding blades around the grinding disc to guide the wind to rise in a vortex, the problem of wasted wind power in the coal mill is solved, and efficient use of wind power and smooth discharge of coal from the furnace are achieved.
Patent Information
- Application Number
- CN202422987138.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing coal mills suffer from significant air waste, requiring substantial airflow to blow up coal of the correct particle size, resulting in a waste of air resources.
Blades are added around the millstone. The rotation of the blades creates disturbance, which guides the horizontal wind force to rise in a vortex shape, blowing up the qualified coal charged into the furnace and preventing the loss of wind power.
By agitating the blades, the wind power demand is reduced, the wind power utilization efficiency is improved, wind power waste is avoided, and the coal with qualified particle size is successfully discharged from the furnace.
Smart Images
Figure CN223587268U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to coking technical field, concretely relates to a kind of coking process coal preparation system. BACKGROUND
[0002] The task of coal preparation system is to process incoming coking coal into charging coal that meets the requirements of coke oven production. The coal preparation system first uses a transfer mechanism to transfer large-sized coking coal to a pre-pulverizing device, which uses a reversible counter-hammer pulverizer to pre-pulverize the coking coal to a particle size of ≤15 mm. Then, the pre-pulverized coking coal is transferred to a coal mill for secondary pulverization, and the particle size of the outcoming coking coal is ≤3 mm. After secondary pulverization, the coking coal is formed into charging coal and sent to a buffer bin of a stamp-charged coke oven.
[0003] The coal mill uses the combination of the pulverizing grooves on the surface of the grinding disc and the grinding roller to grind the coking coal. Then, by adjusting the wind power of the fan, the wind blows the qualified coking coal up along the gap between the grinding disc and the mill housing and out through the discharge port at the top of the coal mill. The coking coal with unqualified particle size or impurities that cannot be ground cannot be blown up by the fan, so they fall onto the surface of the mill stand and enter the slag discharge box through the slag discharge port of the mill stand.
[0004] However, in order to prevent coal slag from falling into the fan, the fan inlet of the coal mill is generally horizontally arranged horizontally. The wind power is divided into upward wind power after colliding with the mill housing in the horizontal direction to blow up the charging coal. This requires a large amount of wind power to blow up the charging coal with qualified particle size, resulting in a large amount of wind power waste. INVENTION CONTENTS
[0005] To solve the above problems in the prior art, the utility model provides a coking process coal preparation system. The utility model adds blades on the circumferential side of the grinding disc. The rotation of the blades forms a disturbance to guide the horizontal wind power to rise in a vortex shape and blow up the charging coal with qualified particle size, avoiding the loss of wind power, so that only a small amount of wind power is needed to blow up the charging coal with qualified particle size.
[0006] The specific technical solutions adopted by the utility model are as follows:
[0007] The utility model relates to a kind of coking process coal processing system, including transfer mechanism, pulverizing mechanism and buffer chamber, coking coal is transported to the pulverizing mechanism by transfer mechanism and is pulverized, the pulverizing mechanism includes pre-pulverizing device and secondary pulverizing device, the discharge end of pre-pulverizing device is connected with the feed end of secondary pulverizing device, the discharge end of secondary pulverizing device is connected with buffer chamber, the secondary pulverizing device includes base and shell, which is buckled above base, and is formed as pulverizing chamber between base and shell, the pulverizing chamber is sequentially provided with slag box, fan, grinding disc, grinding roller and discharge pipe from bottom to top, the grinding disc has the freedom of rotation by motor, and the pulverizing groove matched with grinding roller is arranged on the grinding disc, the gap between the circumferential side of the grinding disc and the shell is provided with blade, the blade is fixedly connected with the grinding disc, and the blade is arranged in ring array with multiple groups with the axis of the grinding disc as center, and the wind formed by fan forms turbulence by blade.
[0008] The circumferential side of the grinding disc is provided with a slot for inserting the blade, and the fixed end of the blade is matched with the slot and fixedly connected with the grinding disc by bolts.
[0009] The free end of the blade away from the grinding disc is in ladder type structure, the waist of the ladder type structure is located below, the free end of the blade is formed as the upper base of the ladder type structure, and the fixed end of the blade is formed as the lower base of the ladder type structure.
[0010] The pulverizing chamber is also provided with a support frame, and the grinding roller is arranged in ring array with multiple groups with the axis of the grinding disc as center, and the grinding roller is suspended above the grinding disc by the support frame, the support frame is adjusted in up-down position by hydraulic support rod, the hydraulic support rod has the freedom of extension and retraction in vertical direction, and the fixed end of the hydraulic support rod is fixedly connected with the base.
[0011] The grinding disc is also provided with a screen, and the screen is arranged in ring array with multiple groups with the axis of the grinding disc as center, and the screen prevents large-size coking coal from leaving the grinding disc.
[0012] The mesh aperture of the screen is 3-5mm, the gap width between adjacent screens is 10-15mm, and impurities fall into the slag box along the gap between adjacent screens.
[0013] The surface of the base is provided with a slag discharge port communicated with the slag box, and the bottom of the grinding disc is provided with a scraper, and impurities on the surface of the base are scraped to the slag discharge port by the scraper and enter the slag box.
[0014] The utility model has the advantages that:
[0015] 1. The utility model discloses a vane is additionally arranged on the periphery of the grinding disc, and the rotation of the vane forms disturbance, guides the wind power in the horizontal direction to rise in the form of vortex and blows the qualified furnace charging coal, the wind power in the horizontal direction is guided upward by the vane before colliding with the casing in the utility model, and the loss of wind power is avoided, so that only small wind power can blow the qualified furnace charging coal.
[0016] 2. The utility model discloses a baffle net, and the baffle net can hinder the large-size coking coal from flying out and returning to the grinding disc to continue to be ground, and the force generated by the large-size coking coal impacting the baffle net can grind the large-size coking coal, and the setting of the baffle net ensures that most of the large-size coking coal can be ground into qualified coking coal. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the structural schematic diagram of the utility model;
[0018] Figure 2 It is Figure 1 It is the enlarged schematic diagram of part A in the utility model;
[0019] Figure 3 It is the overhead structural schematic diagram of the machine base;
[0020] Figure 4 It is the overhead structural schematic diagram of the grinding disc;
[0021] In the drawings, 1, machine base, 2, casing, 3, slag discharge box, 4, fan, 5, grinding disc, 6, grinding roller, 7, discharge pipe, 8, vane, 9, slot, 10, support frame, 11, hydraulic support rod, 12, baffle net, 13, slag discharge port, 14, scraper, 15, motor, 16, grinding groove, 17, guide seat, 18, feed pipe. DETAILED DESCRIPTION
[0022] The utility model will be further described in connection with the drawings and specific embodiments:
[0023] Specific embodiments, such as Figures 1-4The utility model provides a kind of coal processing system for coking process, including transfer mechanism, crushing mechanism and buffer chamber, coking coal is transported to the crushing mechanism by transfer mechanism, the crushing mechanism includes pre-crushing device and secondary crushing device, the discharge end of pre-crushing device is connected with the inlet end of secondary crushing device, the discharge end of secondary crushing device is connected with buffer chamber, the secondary crushing device includes base 1 and the shell 2 of cover buckle above base 1, form crushing chamber between base 1 and shell 2, the crushing chamber is sequentially provided with slag discharge box 3, fan 4, grinding disc 5, grinding roller 6 and discharge pipe 7 from bottom to top, the grinding disc 5 has the freedom of rotation by motor 15, grinding disc 5 is provided with crushing groove 16 matched with grinding roller 6, the gap between the periphery of grinding disc 5 and shell 2 is provided with blade 8, the blade 8 is fixedly connected with grinding disc 5, blade 8 is arranged in multiple groups with the axis of grinding disc 5 as center in annular array, the wind formed by fan 4 forms turbulence by blade 8.
[0024] In order to avoid coal cinder to fall into fan 4, the fan 4 inlet of coal mill is generally horizontally arranged, and the wind force is divided into upward wind force after colliding with the shell 2 along the horizontal direction to blow the charging coal, which results in that a large wind force is needed to blow the charging coal with qualified particle size, causing a large amount of wind force waste.
[0025] Therefore, the utility model adds blade 8 on the periphery of grinding disc 5, and the wind force along the horizontal direction is guided upward by the rotation of blade 8 to form turbulence, and the charging coal with qualified particle size is blown up in a vortex shape and enters the discharge pipe 7, and the wind force is lost before colliding with the shell 2 in the utility model, so that only a small wind force is needed to blow the charging coal with qualified particle size.
[0026] The transfer mechanism in the utility model includes a flat car, a container and a dumper, the flat car pulls the container to load coking coal and transport, reaches the crushing mechanism, and the container is turned over by the dumper to pour the coking coal into the inlet end of the pre-crushing device, the coking coal is once crushed by the pre-crushing device and then enters the inlet end of the secondary crushing device from the discharge end of the pre-crushing device, and is twice crushed to form charging coal with particle size ≤3mm, and the charging coal enters the buffer chamber from the discharge end of the secondary crushing device, wherein the inlet pipe 18 is the inlet end of the secondary crushing device, and the discharge pipe 7 is the discharge end of the secondary crushing device.
[0027] The periphery of grinding disc 5 is provided with a slot 9 for inserting blade 8, the fixed end of blade 8 is matched with slot 9 and is fixedly connected with grinding disc 5 by bolts, blade 8 is detachably fixedly connected by bolts, slot 9 has a relatively deep depth along the horizontal direction, so that blade 8 has the freedom of expansion along the direction of slot 9, so as to adjust the length of blade 8 protruding from the periphery of grinding disc 5 to change the turbulence effect of blade 8 on wind force.
[0028] The free end of the blade 8 away from the grinding disc 5 is in a ladder structure, the waist of the ladder structure of the blade 8 is located below, the free end of the blade 8 is formed as the upper base of the ladder structure, and the fixed end of the blade 8 is formed as the lower base of the ladder structure. The blade 8 of the utility model is in a right-angled trapezoidal shape, and the inclined side of the right-angled trapezoidal shape is inclined from the free end to the fixed end of the blade 8. The blade 8 with the structure can play a better role in guiding and gathering air flow, and can reduce the loss of wind pressure.
[0029] The support frame 10 is further arranged in the crushing chamber, a plurality of groups of the grinding rollers 6 are arranged in a ring array around the axis of the grinding disc 5, the grinding rollers 6 are suspended above the grinding disc 5 by means of the support frame 10, the support frame 10 is adjusted in position up and down by means of the hydraulic support rod 11, the hydraulic support rod 11 has the freedom of stretching and contracting in the vertical direction, the fixed end of the hydraulic support rod 11 is fixedly connected with the base, and the spacing between the grinding disc 5 and the grinding roller 6 can be adjusted by the stretching and contracting of the hydraulic support rod 11, so that the particle size of the coal charged into the furnace can be controlled.
[0030] The grinding disc 5 is further provided with the screen 12, a plurality of groups of the screen 12 are arranged in a ring array around the axis of the grinding disc 5, and the screen 12 prevents the large-particle-size coking coal from separating from the grinding disc 5. In the crushing process, the large-particle-size coking coal may fly out of the grinding disc 5 due to inertia and collision, so that the large-particle-size coking coal and the impurities that cannot be ground fall into the slag discharging box 3 together. The large-particle-size coking coal in the slag discharging box 3 is more, and the separation of the coking coal and the impurities is difficult, which increases the working difficulty. Therefore, the screen 12 is arranged in the utility model, the screen 12 can prevent the large-particle-size coking coal from flying out and returning to the grinding disc 5 for further crushing, and the force generated by the impact of the large-particle-size coking coal on the screen 12 can crush the large-particle-size coking coal. By arranging the screen 12, most of the large-particle-size coking coal can be ground into qualified coking coal of a qualified particle size.
[0031] The mesh aperture of the screen 12 is 3-5 mm, and the gap width between the adjacent screens 12 is 10-15 mm. The impurities fall into the slag discharging box 3 along the gap between the adjacent screens 12. Since the particle size requirement of the coal charged into the furnace in the utility model is ≤3 mm, the mesh aperture of the screen 12 is slightly larger than the qualified particle size of the coal charged into the furnace, so that the qualified coal charged into the furnace can smoothly pass through the mesh aperture of the screen 12, and the large-particle-size coking coal is blocked. The gap between the adjacent screens 12 is to ensure that the non-grindable impurities with a large particle size can pass through.
[0032] The surface of the base 1 is provided with a slagging port 13 communicated with a slagging box 3, and the bottom of the grinding disc 5 is provided with a scraper 14, the impurities on the surface of the base 1 are scraped to the slagging port 13 by the scraper 14 and enter the slagging box 3, and the impurities and large-size coking coal on the surface of the base 1 can be pushed to the slagging port 13 by the scraper 14.
[0033] The center of the grinding disc 5 is further provided with a conical guide seat 17, and the tapered tip of the guide seat 17 faces a feeding pipe 18 of the secondary crushing device. The coking coal falling on the grinding disc 5 can be guided to the crushing groove 16 for secondary crushing by the guide seat 17.
Claims
1. A coking coal preparation and processing system, comprising a transfer mechanism, a crushing mechanism, and a buffer chamber, wherein coking coal is transported to the crushing mechanism for crushing via the transfer mechanism, the crushing mechanism comprising a pre-crushing device and a secondary crushing device, the discharge end of the pre-crushing device being connected to the inlet end of the secondary crushing device, the discharge end of the secondary crushing device being connected to the buffer chamber, the secondary crushing device comprising a base (1) and a housing (2) covering the base (1), the base (1) and the housing (2) forming a crushing chamber, wherein a slag discharge box (3), a blower (4), a grinding disc (5), a grinding roller (6), and a discharge pipe (7) are arranged sequentially from bottom to top within the crushing chamber, the grinding disc (5) having a degree of freedom of rotation via a motor (15), and a crushing groove (16) cooperating with the grinding roller (6) is provided on the grinding disc (5), characterized in that, Blades (8) are provided in the gap between the side of the grinding disc (5) and the housing (2). The blades (8) are fixedly connected to the grinding disc (5). Multiple sets of blades (8) are arranged in a ring array with the axis of the grinding disc (5) as the center. The wind generated by the fan (4) forms turbulence with the help of the blades (8).
2. The coking coal preparation and processing system according to claim 1, characterized in that, The grinding disc (5) has a slot (9) on its periphery for inserting blades (8). The fixed end of the blade (8) is engaged with the slot (9) and fixedly connected to the grinding disc (5) by means of bolts.
3. The coking coal preparation and processing system according to claim 1, characterized in that, The free end of the blade (8) away from the grinding disc (5) has a trapezoidal structure, the waist of the trapezoidal structure of the blade (8) is located at the bottom, the free end of the blade (8) forms the upper base of the trapezoidal structure, and the fixed end of the blade (8) forms the lower base of the trapezoidal structure.
4. The coking coal preparation and processing system according to claim 1, characterized in that, The crushing chamber is also provided with a support frame (10). The grinding rollers (6) are arranged in a ring array with the axis of the grinding disc (5) as the center. The grinding rollers (6) are suspended above the grinding disc (5) by means of the support frame (10). The support frame (10) is adjusted up and down by means of a hydraulic strut (11). The hydraulic strut (11) has the freedom to extend and retract in the vertical direction. The fixed end of the hydraulic strut (11) is fixedly connected to the base.
5. A coal preparation and processing system for coking process according to claim 1, characterized in that, The millstone (5) is also provided with a baffle (12) around its perimeter. The baffle (12) is arranged in a ring array with the millstone (5) axis as the center, and multiple sets are arranged at intervals. The baffle (12) prevents large-particle coking coal from leaving the millstone (5).
6. A coal preparation and processing system for coking process according to claim 5, characterized in that, The mesh size of the baffle (12) is 3-5mm, and the gap between adjacent baffles (12) is 10-15mm. Impurities fall into the slag discharge box (3) along the gap between adjacent baffles (12).
7. A coal preparation and processing system for coking process according to claim 1, characterized in that, The machine base (1) is provided with a slag discharge port (13) that communicates with the slag discharge box (3). The bottom of the grinding disc (5) is provided with a scraper (14). Impurities on the surface of the machine base (1) are scraped to the slag discharge port (13) by the scraper (14) and enter the slag discharge box (3).