Coal slime conveying system

Abstract

The invention relates to the technical field of coal slime conveying, and particularly discloses a coal slime conveying system which comprises a material supply system, a material distribution system, a conveying system, a plurality of transfer bins used for transferring coal slime conveyed by the conveying system, and feeding systems communicated with the transfer bins and arranged in a one-to-one correspondence mode. The transfer bin comprises a third coal falling pipe located at the bottom of the conveying system, crushing equipment communicating with the bottom of the third coal falling pipe, and a coal slime bin communicating with the outlet end of the crushing equipment. An outlet of the coal slime bin is communicated with an inlet of the feeding system; according to the coal slime combustion system, on the premise that water is not mixed and airing and drying are not carried out, coal slime with the water content of 15%-20% can be directly combusted, and the economical efficiency and the environmental protection property of the system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal slime transportation, and more particularly to a coal slime transportation system. Background Art

[0002] The annual output of coal slime in China is about 200 million tons. One of the best ways to utilize coal slime is to transport it to circulating fluidized bed boiler power plants for blending, which has good economic and social benefits. According to the latest coal washing process, the moisture content of coal slime produced by coal washing plants is usually 15-20%.

[0003] At present, the coal slime conveying system for power plants mainly adopts coal slime pump + pipeline conveying system. Its conveying moisture content is mostly in the range of 28-33%, and the actual operation of power plants is mostly in the range of 30-35%, and even up to 40% in some power plants. This kind of coal slime with high moisture content will increase the exhaust gas temperature and reduce the combustion efficiency of the boiler. The investment cost and operating energy consumption of the coal slime plunger pump pipeline conveying system itself are also expensive. Taking two 300MWCFB units as an example, the amount of coal slime blended in each furnace is 22-27t / h, the conveying distance is 300-400m, and the procurement cost of the coal slime system is about 18 million yuan (plus comprehensive costs such as civil engineering, the total cost exceeds 30 million yuan), and the operating power exceeds 500KW.

[0004] Some power plants use drying or drying to reduce the moisture content of coal slime. When the moisture content of coal slime is less than 12%, it is sent to the coal conveyor belt to be mixed with coal and enter the furnace for combustion. The above methods have the following main problems:

[0005] (1) Improve the delivery concentration of the coal slurry plunger pump pipeline delivery system;

[0006] For coal slime pipeline transportation, the moisture content of coal slime is affected by many factors such as coal slime characteristics and pipeline characteristics. The limit moisture content is about 28%, which greatly reduces the boiler combustion efficiency.

[0007] (2) A system using off-furnace coal slime drying;

[0008] The existing drying equipment has low output per set, complex drying system, and expensive investment. In addition, the drying system has high energy consumption and large loss of calorific value of coal slime.

[0009] (3) Drying the coal slime;

[0010] Drying clothes causes serious environmental pollution and is also greatly affected by the climate.

[0011] Therefore, the above methods cannot meet the requirements of large capacity, significantly reducing the moisture content of the coal slime system, and good economy. Summary of the invention

[0012] The technical problem to be solved by the present invention is to provide a coal slime conveying system.

[0013] The solution adopted by the present invention to solve the technical problem is:

[0014] A coal slime conveying system, comprising a feeding system, a material distribution system, a conveying system, a plurality of transfer bins for transferring the coal slime conveyed by the conveying system, and a feeding system respectively connected to the transfer bins and arranged in a one-to-one correspondence;

[0015] The transfer bin includes a coal drop pipe three located at the bottom of the conveying system, a crushing device connected to the bottom of the coal drop pipe three, and a coal slime bin connected to the outlet end of the crushing device; the outlet of the coal slime bin is connected to the inlet of the feeding system.

[0016] The coal slime in the feeding system is transported to the dividing system for tearing and dividing the coal slime; then it is transported to the conveying system, and transported through the conveying system. During the transportation process, the conveying system removes iron from the coal slime and then unloads it into the coal slime bin; the coal slime is broken up in the coal slime bin and then transported to the feeding system. The present invention can directly burn coal slime with a moisture content of 15-20% without adding water or drying it in the sun, thereby improving the economy and environmental protection of the system.

[0017] In some possible implementations, in order to effectively separate and tear the coal slime in the feeding system so that it can enter the feeding system;

[0018] The material distribution system includes a feeding buffer hopper, a coal slurry tearing machine, a filtering component, and a spiral feeder that are connected and arranged in sequence from top to bottom;

[0019] The feeding buffer hopper and the coal slime tearing machine are located in the feeding system, and the filtering component is installed at the bottom of the feeding system.

[0020] In some possible implementations, in order to effectively transport the coal sludge transported by the feeding system, iron removal and unloading operations are performed;

[0021] The conveying system includes a belt conveying mechanism 1 whose input end is located at the bottom of the screw feeder 1, a belt conveying mechanism 2, a belt conveying mechanism 3, an iron remover located above the belt conveying mechanism 1, and a coal plow located above the belt conveying mechanism 3;

[0022] A coal drop pipe 1 is provided between the output end of the belt conveyor mechanism 1 and the output end of the belt conveyor mechanism 2;

[0023] A coal drop pipe 2 is provided between the output end of the belt conveyor mechanism 2 and the output end of the belt conveyor mechanism 3;

[0024] The coal drop pipe three is located at the bottom of the belt conveyor mechanism three.

[0025] The reason for setting up multiple groups of belt conveyor mechanisms is mainly to be able to effectively adapt to the production and processing space environment, realize turning conveying, and adjust the conveying direction.

[0026] In some possible implementations,

[0027] The feeding system includes a screw feeder 2 connected to the outlet of the coal slime bin, a screw feeder 3 connected to the outlet of the screw feeder 2 and located below the screw feeder 2, a furnace connected to the outlet of the screw feeder 3 through a coal slime pipe, and a furnace injector arranged on the coal slime pipe.

[0028] In some possible implementations, in order to effectively avoid maintenance;

[0029] A manual shut-off valve and a pneumatic or electric shut-off valve are arranged in sequence between the inlet of the screw feeder 1 and the outlet of the coal slime bin, and between the inlet of the screw feeder 1 and the outlet of the screw feeder 1.

[0030] In some possible implementations, in order to avoid the inability of coal slime to be transferred and unloaded in the coal slime silo due to the high viscosity and low fluidity of the coal slime;

[0031] In some possible implementations,

[0032] The coal slime silo comprises a silo with an inlet at the top, a pneumatic filling system, a scattering mechanism, a material shifting mechanism, a discharge device, and an air sweeping system installed outside the silo and connected to the inside of the silo; the pneumatic filling system, the scattering mechanism, the material shifting mechanism and the discharge device are installed in the silo and arranged from top to bottom; the pneumatic filling system is located below the inlet; the discharge device is externally connected to a material drop pipe;

[0033] The warehouse body is a columnar structure, including a straight columnar structure with an inlet at the top and an inverted cone structure coaxially arranged and connected to the straight columnar structure; the height of the straight columnar structure along its axial direction is A, and the height of the inverted cone along its axial direction is B, wherein A:B=0.5-1.

[0034] In some possible implementations,

[0035] The straight columnar structure is cylindrical or square, and the inverted cone structure is a truncated cone connected to a cylindrical shape or a prism connected to a square column; wherein the small end of the inverted cone structure is connected to the straight columnar structure;

[0036] A partition is arranged above the unloading device, and a chamber for installing the unloading device is formed between the partition and the bottom of the warehouse body; a feeding port connected with the chamber and located directly above the unloading device is arranged on the partition.

[0037] In some possible implementations, in order to effectively realize that all the coal slime can be transported to the feeding mechanism through the material shifting structure;

[0038] The material-digging mechanism comprises a material-digging plate coaxially arranged with the inverted cone structure and located above the partition, a driving motor located outside the bottom of the bin body and drivingly connected to the material-digging plate, and a material-digging arm connected to the material-digging plate and drivingly connected to the output shaft of the driving motor;

[0039] The material-digging arms are divided into multiple groups and are arranged along the circumference of the material-digging disc; the material-digging arms include an elastic material-digging rod with one end connected to the material-digging disc, a material-digging blade installed on the material-digging rod, and a scraper hook arranged at the other end of the material-digging rod; the scraper hook is connected to the material-digging disc through an elastic member.

[0040] In some possible implementations,

[0041] The material-shifting mechanism comprises a material-shifting frame installed in the inverted cone structure and located above the partition, and a linear drive mechanism located outside the bin body and used for controlling the material-shifting frame to make linear motion.

[0042] In some possible embodiments, the scattering mechanism is installed in the inverted cone structure, including two sets of rotating shafts rotatably installed in the warehouse body and arranged in parallel, cutting components respectively installed on the two sets of rotating shafts and arranged along the length direction of the rotating shafts, and a rotating shaft driving device connected to the two sets of rotating shafts and used to control the two sets of rotating shafts to move toward each other; the two sets of rotating shafts move toward each other;

[0043] Each group of the cutting components includes a plurality of groups of cutting blades arranged along the circumference of the rotating shaft and on the same plane;

[0044] The cutting blade comprises a mounting portion mounted on the rotating shaft at one end, a blade portion arranged at one end of the mounting portion away from the rotating shaft and provided with an arc-shaped cutting edge; a drainage groove is arranged on the outer side of the blade portion; and hook teeth are arranged on the rear side of the arc-shaped cutting edge in the direction of rotation around the rotating shaft;

[0045] The cutting blades in each group of cutting assemblies are evenly arranged along the circumference of the rotating shaft, and a matching cavity for matching with the cutting blades on the other group of rotating shaft is formed between the two groups of cutting blades.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] The present invention transports the coal slime to the material distribution system through the feeding system, and then transports it to the conveying system through the material distribution system, and the conveying system transports the coal slime to the transfer bin; the transfer bin transfers and unloads the coal slime and transports it to the feeding system; the moisture content of the coal slime does not need to be increased during the whole process, and the combustion efficiency of the coal slime in the later stage will not be affected; at the same time, the coal slime does not need to be dried during the whole process, which greatly reduces the cost;

[0048] The coal slime bin of the present invention first breaks up the coal slime in the bin body, and the broken up coal slime falls down under the action of gravity, and then the broken up coal slime is cut by the material shifting mechanism and discharged to the feeding mechanism; the feeding mechanism delivers the coal slime to the drop pipe; compared with the prior art, the present invention can effectively realize the storage and unloading of coal slime with high viscosity and low fluidity, and ensure the normal storage and unloading of coal slime with a moisture content of 15-20%;

[0049] The material-dispensing mechanism of the present invention is characterized in that a material-dispensing plate is provided with an elastic material-dispensing rod, a cutting blade is installed on the material-dispensing rod, and a scraping hook is arranged at the end thereof; when dispensing materials, the material-dispensing plate rotates to drive the material-dispensing rod to rotate, so that the cutting blade and the scraping hook on the material-dispensing rod cut the viscous material; the material-dispensing rod is elastic so that the material-dispensing rod can be deformed during the rotating material-dispensing process, and will not be damaged during the material-dispensing process;

[0050] The present invention allows the material-shifting rack to perform linear reciprocating motion on the partition plate, and allows the viscous material falling from the drag-reducing plate to enter the unloading device through the inlet and the outlet;

[0051] The present invention adopts the disintegration mechanism to break up the viscous material by shearing and tearing the viscous material instead of impacting, hitting or rolling, so that the viscous material in the silo that may be agglomerated before entering the unloading link is broken up into small particles (less than 30mm or even 10mm) of viscous material; the problem of viscous material aggregation and agglomeration is effectively solved;

[0052] The present invention effectively controls the particle size of the discharged particles by controlling the rotation speeds of two groups of rotating shafts on the same scattering device and the gaps between two adjacent groups of cutting blades arranged along the axial direction on the same rotating shaft.

[0053] The invention has simple structure and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural schematic diagram of the present invention;

[0055] Figure 2 This is a schematic diagram of the structure of the warehouse body of the present invention when it is a combination of a truncated cone and a cylindrical shape;

[0056] Figure 3It is a schematic diagram of the structure when the warehouse body is a combination of a prism shape and a square column shape in the present invention;

[0057] Figure 4 It is a structural schematic diagram of the arc plate and the bin body in the present invention;

[0058] Figure 5 It is a structural schematic diagram of the unloading device, the partition, the material shifting mechanism and the bin body in the present invention;

[0059] Figure 6 It is a schematic diagram of the structural relationship between the warehouse body, the breaking mechanism and the air cannon in the present invention;

[0060] Figure 7 It is a structural schematic diagram of the material shifting mechanism in the present invention;

[0061] Figure 8 It is a schematic diagram of the mechanism of the rotating shaft and the cutting assembly in the present invention;

[0062] Fig. 9 It is a side view of the breaking up mechanism in the present invention;

[0063] Fig.10 It is an axonometric view of the breaking up mechanism in the present invention;

[0064] Among them: 1. Feeding system; 21. Feed buffer hopper; 22. Coal slurry tearing machine; 23. Filter assembly; 24. Screw feeder 1; 25. Iron remover; 26. Belt conveyor mechanism 1; 27. Dropping pipe 1; 28. Belt conveyor mechanism 2; 29. ​​Dropping pipe 2; 30. Belt conveyor mechanism 2; 31. Coal plow; 32. Coal drop pipe 3; 33. Crushing equipment; 34. Coal slurry bin; 341-bin body, 3411-arc plate, 3412-straight columnar structure, 3413-inverted cone structure, 342-pneumatic filling system, 343-disintegration mechanism, 3431-rotating shaft, 3432-cutting blade, 3433-spindle, 3434-spindle, 3435-spindle, 3436-spindle, 3437-spindle, 3438-spindle, 3439-spindle, 3440-spindle, 3441-spindle, 3442-spindle, 3443-spindle, 3444-spindle, 3445-spindle, 3446-spindle, 3447-spindle, 3448-spindle, 3449-spindle, 3450-spindle, 3451-spindle, 3452-spindle, 3460-spindle, 3461-spindle, 3462-spindle, 3470-spindle, 3471-spindle, 3472-spindle, 3473-spindle 4321-installation part, 34322-blade part, 343221-drainage groove, 34323-hook tooth, 344-feeding mechanism, 3441-feeding plate, 3442-feeding rod, 3443-feeding blade, 3444-scraping hook, 3445-elastic part, 3446-linear driving mechanism, 3447-feeding rack, 345-partition, 346-unloading device, 347-air sweeping system, 348-drag reduction plate; 35. Manual shut-off valve; 36. Pneumatic or electric shut-off valve; 37. Screw feeder 2; 38. Screw feeder 3; 39. Coal slurry pipe; 40. Furnace injector; 41. Furnace chamber. DETAILED DESCRIPTION

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity restriction, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] The present invention is described in detail below.

[0067] like Figure 1-Figure 6 As shown:

[0068] A coal slime conveying system, comprising a feeding system 1, a material distribution system, a conveying system, a plurality of transfer bins for transferring the coal slime conveyed by the conveying system, and feeding systems respectively connected to the transfer bins and arranged one by one;

[0069] The transfer bin includes a coal drop pipe 32 located at the bottom of the conveying system, a crushing device 33 connected to the bottom of the coal drop pipe 32, and a coal slime bin 34 connected to the outlet end of the crushing device 33; the outlet of the coal slime bin 34 is connected to the inlet of the feeding system.

[0070] The coal slime in the feeding system 1 is transported to the dividing system for coal slime tearing and dividing; then it is transported to the conveying system, and is transported through the conveying system. During the transportation process, the conveying system removes iron from the coal slime and then unloads it into the coal slime bin 34; the coal slime is broken up in the coal slime bin 34 and then transported to the feeding system.

[0071] In some possible implementations, in order to effectively separate and tear the coal slime in the feeding system 1 so that it can enter the feeding system;

[0072] The material distribution system includes a feed buffer hopper 21, a coal slurry tearing machine 22, a filter assembly 23, and a screw feeder 24 which are connected and arranged in sequence from top to bottom;

[0073] The feed buffer hopper 21 and the coal slime tearing machine 22 are located in the feeding system 1 , and the filter assembly 23 is installed at the bottom of the feeding system 1 .

[0074] The filtering component is a grate arranged at the outlet end of the coal slime tearing machine 22. After the coal slime is processed by the coal slime tearing machine 22, it is filtered through the grate and then transported to the screw feeder 24.

[0075] In some possible implementations, in order to effectively transport the coal sludge transported by the feeding system, iron removal and unloading operations are performed;

[0076] The conveying system includes a belt conveying mechanism 1 26 whose input end is located at the bottom of the screw feeder 1 24, a belt conveying mechanism 2 28, a belt conveying mechanism 3 30, an iron remover 25 located above the belt conveying mechanism 1 26, and a coal plow 31 located above the belt conveying mechanism 3 30;

[0077] A coal drop pipe 1 27 is provided between the output end of the belt conveyor mechanism 1 26 and the output end of the belt conveyor mechanism 2 28;

[0078] A second coal drop pipe 29 is provided between the output end of the second belt conveyor mechanism 28 and the output end of the third belt conveyor mechanism 30;

[0079] The coal drop pipe three 32 is located at the bottom of the belt conveyor mechanism three 30.

[0080] Preferably, when the coal slime bin 34 is a group, the conveying system only includes the belt conveyor mechanism 1 26 and the belt conveyor mechanism 2 28 , and the coal plow 31 will be located above the belt conveyor mechanism 2 28 .

[0081] The belt conveyor mechanism, coal plow 31, coal drop pipe, iron remover 25, and spiral feeding mechanism in the present invention are all existing equipment and can be directly purchased and assembled;

[0082] Preferably, the coal drop pipe is curved, and the specific structure can be set according to the requirements of on-site installation and avoiding clogging by coal slime.

[0083] The iron remover 25 is located at the input end of the belt conveyor mechanism 26. After the screw feeder 1 conveys the coal slime to the input end of the belt conveyor mechanism 26 and then conveys it to its output end, the iron remover 25 located above the input end will timely remove iron from the coal slime at the input end to prevent iron-containing components from entering related equipment later through the conveying system, causing equipment damage.

[0084] The coal dropping pipe 27 located at the output end of the belt conveyor mechanism 26 transfers the coal slime transported by the belt conveyor mechanism 26 to the input end of the belt conveyor mechanism 28, and then transports it to its output end through the belt conveyor mechanism 26; the coal dropping pipe 29 is used to receive the coal slime transported by the belt conveyor mechanism 28 and transport it to the input end of the belt conveyor mechanism 30; when the belt conveyor mechanism 26 transports the coal slime, the coal plow 31 located above it unloads the coal slime and makes it enter the coal dropping pipe 32; the number of the coal dropping pipes 32 is determined according to the number of the coal slime bins 34, and the two are arranged in a one-to-one correspondence; the coal slime entering the coal dropping pipe 32 is crushed by the crushing equipment 33 and then transported to the coal slime bin 34 for transfer storage and unloading;

[0085] In some possible implementations,

[0086] The feeding system includes a screw feeder 2 37 connected to the outlet of the coal slime bin 34, a screw feeder 38 connected to the outlet of the screw feeder 2 37 and located below the screw feeder 2 37, a furnace 41 connected to the outlet of the screw feeder 38 through a coal slime pipe 39, and a furnace injector 40 arranged on the coal slime pipe 39.

[0087] When the coal slime is needed, the coal slime bin 34 processes the coal slime and then conveys it to the coal slime pipe 39 through the screw feeder 2 37 and the screw feeder 38 in turn; the function of the furnace injector 40 is to convey compressed gas into the coal slime pipe 39 so that the coal slime can smoothly enter the furnace 41.

[0088] In some possible implementations, in order to effectively avoid maintenance;

[0089] A manual shut-off valve 35 and a pneumatic or electric shut-off valve 36 are arranged in sequence between the inlet of the screw feeder 1 and the outlet of the coal slime bin 34 and between the inlet of the screw feeder 1 and the outlet of the screw feeder 1.

[0090] The manual shut-off valve 35 is in a normally open state. Only when the pneumatic or electric shut-off valve 36 is damaged and needs to be repaired, the manual shut-off valve 35 is closed for repair.

[0091] like Figure 2 , Figure 4-Figure 8 As shown,

[0092] The coal slime bin 34 includes a bin body 341 with an inlet at the top, a pneumatic filling system 342, a breaking up mechanism 343, a material shifting mechanism 344, a discharge device 346, and an air sweeping system 347 installed on the outside of the bin body 341 and connected to the inside of the bin body 341; the pneumatic filling system 342, the breaking up mechanism 343, the material shifting mechanism 344 and the discharge device 346 are installed in the bin body 341 and arranged from top to bottom; the pneumatic filling system 342 is located below the inlet; the discharge device 346 is externally connected to a drop pipe.

[0093] During storage, the viscous material enters the bin body 341 through the inlet for storage;

[0094] During the transfer, the viscous material is subjected to the lateral force of the gas or powder flow sprayed into the bin body 341 by the pneumatic filling system 342 arranged on the top of the bin body 341, and then changes the falling trajectory and falls into the bin body 341, so that the stacking angle of the viscous material in the bin body 341 changes, thereby improving the filling degree; the viscous material will fall downward, because the viscous material has high viscosity and low fluidity; first, the viscous material is broken up by the breaking mechanism 343, and the broken viscous material falls downward under gravity, and is cut by the material-dispensing mechanism 344 and transported to the unloading device 346; it is transported to the dropping pipe through the unloading device 346 for external discharge and transportation; during the transfer process, the pneumatic filling system 342 will inject gas into the bin body 341, so as to avoid the viscous material from bridging and arching during the dropping process, thereby avoiding the failure of normal dropping;

[0095] In some possible implementations, in order to prevent the coal slime from bulging when falling;

[0096] The silo body 341 is a columnar structure, including a straight columnar structure 3412 with an inlet at the top, and an inverted cone structure 3413 coaxially arranged and connected to the straight columnar structure 3412; the height of the straight columnar structure 3412 along its axial direction is A, and the height of the inverted cone along its axial direction is B, wherein A:B=0.5-1; when the viscous material is a viscous material with weak adhesion, a larger value such as 0.8-0.1 can be selected, and for a viscous material with strong adhesion, 0.5-0.7 can be selected.

[0097] The straight columnar structure 3412 is a square columnar structure, and the inverted cone structure 3413 is a prism-shaped structure connected to the square columnar structure; wherein the small end of the inverted cone structure 3413 is connected to the straight columnar structure 3412; the effect of setting a truncated cone shape with a small top and a large bottom is that the viscous material automatically falls off from the inner wall under the action of gravity and is not prone to hanging on the wall, thereby effectively reducing bridging and arching.

[0098] Furthermore, the cone angle α of the cone surface of the inverted cone structure 3413 is greater than the repose angle of the viscous material.

[0099] In order to effectively transport all the coal slimes to the unloading device 346 through the material-shifting structure, a partition 345 is provided above the unloading device 346, and a chamber for installing the unloading device 346 is formed between the partition 345 and the bottom of the bin body 341; a feeding port connected to the chamber and located directly above the unloading device 346 is provided on the partition 345.

[0100] Preferably, the unloading device 346 is a double-shaft screw unloading device 346 in the prior art;

[0101] In some possible implementations, in order to effectively deliver the coal slime to the discharge device 346 through the material shifting mechanism 344;

[0102] The material-discharging mechanism 344 includes a material-discharging plate 3441 coaxially arranged with the inverted cone structure 3413 and located above the partition 345, a driving motor located outside the bottom of the bin body 341 and transmission-connected to the material-discharging plate 3441, and a material-discharging arm connected to the material-discharging plate 3441 and transmission-connected to the output shaft of the driving motor.

[0103] The material dispensing plate 3441 is driven by the driving motor to drive the material dispensing arm to rotate, cut the sticky material and convey it to the unloading device 346;

[0104] In some possible implementations,

[0105] The material tapping arms are divided into multiple groups and are arranged along the circumference of the material tapping disc 3441; the material tapping arms include an elastic material tapping rod 3442 whose one end is connected to the material tapping disc 3441, a material tapping blade 3443 installed on the material tapping rod 3442, and a scraper hook 3444 arranged at the other end of the material tapping rod 3442; the scraper hook 3444 is connected to the material tapping disc 3441 through an elastic member 3445.

[0106] The material-moving blades 3443 are in multiple groups and are arranged along the long direction of the material-moving rod 3442;

[0107] The elastic member 3445 may be a spring. In the initial state, there is a small gap between the scraper hook 3444 and the inner wall of the bin body 341. When the material is being moved, the material moving rod 3442 is deformed toward the side close to the elastic member 3445. At this time, the elastic member 3445 is in a compressed state and applies a force to the material moving rod 3442. In this way, when the material moving rod 3442 is subjected to a force applied to it by a highly viscous material, the elastic member 3445 applies a reverse force to it, thereby offsetting the force and preventing it from breaking.

[0108] Preferably, the entire material-dispensing arm is made of elastic alloy steel material with wear resistance. The material-dispensing rods 3442 are evenly distributed along the circumference of the material-dispensing disk 3441, and one end of the material-dispensing rods 3442 is horizontally fixed on the side wall of the material-dispensing disk 3441 along the tangential direction. Preferably, the material-dispensing blades 3443 are oriented in the same direction and are inclined toward the rotation direction of the material-dispensing disk 3441.

[0109] Preferably, the material moving rods 3442 are in two groups;

[0110] In some possible implementations, in order to effectively break up the coal slime;

[0111] The dispersing mechanism 343 is a double-axis dispersing machine in the prior art;

[0112] In order to break up the agglomerated sticky materials into small particles before entering the unloading stage;

[0113] The breaking up mechanism 343 is installed in the inverted cone structure 3413, and includes two sets of rotating shafts 3431 rotatably installed in the warehouse body 341 and arranged in parallel, cutting components respectively installed on the two sets of rotating shafts 3431 and arranged along the axial length direction of the rotating shafts 3431, and a rotating shaft driving device which is transmission-connected with the two sets of rotating shafts 3431 and is used to control the two sets of rotating shafts 3431 to move toward each other; the two sets of rotating shafts 3431 move toward each other.

[0114] The shaft drive device adopts a low-speed motor with a reducer directly connected to the double shafts, and the drive device is installed outside the warehouse body 341 for easy inspection and maintenance;

[0115] In some possible implementations,

[0116] Each group of the cutting components includes a plurality of groups of cutting blades 3432 arranged circumferentially along the rotating shaft 3431 and on the same plane;

[0117] The cutting blade 3432 includes a mounting portion 34321 with one end mounted on the rotating shaft 3431, and a blade portion 34322 which is arranged at one end of the mounting portion 34321 away from the rotating shaft 3431 and is provided with an arc-shaped cutting edge; a drainage groove 343221 is arranged on the outer side of the blade portion 34322; and a hook tooth 34323 is arranged on the rear side of the arc-shaped cutting edge in the direction of rotation around the rotating shaft 3431.

[0118] In some possible implementations,

[0119] The cutting blades 3432 in each group of cutting assemblies are evenly arranged along the circumference of the rotating shaft 3431 , and a matching cavity for matching with the cutting blades 3432 on the other group of rotating shaft 3431 is formed between the two groups of cutting blades 3432 .

[0120] The cutting blades 3432 on the two sets of rotating shafts 3431 arranged in parallel rotate synchronously towards each other, wherein when the matching cavity on one set of cutting components rotates to the side close to the other set of rotating shafts 3431, the blade rotated to the side close to the rotating shaft 3431 will be located in the matching cavity; self-cleaning is achieved through the cooperation between the blade and the matching cavity;

[0121] Furthermore, there are three groups of cutting blades 3432 in each cutting assembly, and they are evenly arranged around the circumference of the rotating shaft 3431; a shaft sleeve is provided on the rotating shaft 3431, and the mounting portion 34321 of the cutting blade 3432 is vertically mounted on the shaft sleeve.

[0122] A gap is formed between the cutting components on the same rotating shaft 3431; the cutting blade 3432 is installed at 90 degrees to the rotating shaft 3431, so that the sticky material is broken up from top to bottom, and the cutting effect is achieved through the blade portion 34322; the hook teeth 34323 are arranged so that during the rotation of the rotating shaft 3431, the end of the hook teeth 34323 will rotate around the rotating shaft 3431 for installing the cutting belt deception to the side close to another set of rotating shafts 3431, and exert a downward gripping force on the conveyed sticky material, so that the sticky material is gripped and torn and separated;

[0123] Further, such as Fig.10 As shown, the cutting components on each rotating shaft 3431 are multiple groups and are arranged along the axial direction of the rotating shaft 3431. The three groups of cutting blades 3432 in two adjacent groups of cutting components are staggered, so that a concave-convex groove 3433 is formed between the two groups of rotating shafts 3431, so that large pieces of viscous materials can fall into the concave-convex groove 3433, which is convenient for the cutting range of the arc-shaped blade edge and is conducive to cutting;

[0124] There are multiple groups of drainage grooves 343221 and they are arranged on the side of the blade portion 34322, so that after the viscous material is cut, it is convenient to separate the cut viscous material into sections.

[0125] Further, such as Figure 2 , Figure 3 As shown, the breaking up mechanism 343 is composed of multiple groups, which are arranged in a staggered design.

[0126] like Figure 3-Figure 9 As shown, the coal slime bin 34 can also be of the following structure, specifically:

[0127] The coal slime bin 34 includes a bin body 341 with an inlet at the top, a pneumatic filling system 342, a breaking up mechanism 343, a material shifting mechanism 344, a discharge device 346, and an air sweeping system 347 installed on the outside of the bin body 341 and connected to the inside of the bin body 341; the pneumatic filling system 342, the breaking up mechanism 343, the material shifting mechanism 344 and the discharge device 346 are installed in the bin body 341 and arranged from top to bottom; the pneumatic filling system 342 is located below the inlet; the discharge device 346 is externally connected to a drop pipe.

[0128] In some possible implementations, in order to prevent the coal slime from bulging when falling;

[0129] The silo body 341 is a columnar structure, including a straight columnar structure 3412 with an inlet at the top, and an inverted cone structure 3413 coaxially arranged and connected to the straight columnar structure 3412; the height of the straight columnar structure 3412 along its axial direction is A, and the height of the inverted cone along its axial direction is B, wherein A:B=0.5-1; when the viscous material is a viscous material with weak adhesion, a larger value such as 0.8-0.1 can be selected, and for a viscous material with strong adhesion, 0.5-0.7 can be selected.

[0130] The straight columnar structure 3412 is cylindrical, and the inverted cone structure 3413 is a truncated cone connected to the cylindrical shape; wherein the small end of the inverted cone structure 3413 is connected to the straight columnar structure 3412 .

[0131] Furthermore, the cone angle α of the cone surface of the inverted cone structure 3413 is greater than the repose angle of the viscous material.

[0132] In order to effectively transport all the coal slimes to the unloading device 346 through the material-shifting structure, a partition 345 is provided above the unloading device 346, and a chamber for installing the unloading device 346 is formed between the partition 345 and the bottom of the bin body 341; a feeding port connected to the chamber and located directly above the unloading device 346 is provided on the partition 345.

[0133] In some possible implementations, in order to effectively deliver the coal slime to the discharge device 346 through the material shifting mechanism 344;

[0134] The material-dispensing mechanism 344 includes a material-dispensing frame 3447 installed in the inverted cone structure 3413 and located above the partition 345, and a linear drive mechanism 3446 located outside the bin body 341 and used to control the material-dispensing frame 3447 to make a linear motion on the partition 345;

[0135] The material shifting frame 3447 includes a plurality of horizontal bars arranged in parallel and perpendicular to the direction of movement thereof, and a connecting rod for connecting two adjacent groups of horizontal bars;

[0136] The cross section of the horizontal bar is a right triangle structure, and the hypotenuse is arranged on the side away from the linear drive mechanism 3446 .

[0137] A drag reducing plate 348 is disposed above the feed port, and an inlet communicating with the feed port is formed between the drag reducing plate 348 and the partition plate 345 .

[0138] The drag reducing plate 348 is inclined and located above the feeding port. An inlet is formed between the end of the plate close to the partition 345 and the partition 345. The viscous material dispersed by the dispersing mechanism 343 slides from the drag reducing plate 348 to the partition 345, and enters the discharge device 346 through the inlet and the feeding port under the drive of the material diverting mechanism 344. The setting of the drag reducing plate 348 will effectively prevent the viscous material from directly entering the feeding port, causing the discharge device 346 to be unable to start normally under the gravity of the viscous material.

[0139] In some possible implementations, in order to effectively break up the coal slime;

[0140] The breaking up mechanism 343 is installed in the inverted cone structure 3413, and includes two sets of rotating shafts 3431 rotatably installed in the warehouse body 341 and arranged in parallel, cutting components respectively installed on the two sets of rotating shafts 3431 and arranged along the length direction of the rotating shafts 3431, and a rotating shaft driving device which is transmission-connected with the two sets of rotating shafts 3431 and is used to control the two sets of rotating shafts 3431 to move toward each other; the two sets of rotating shafts 3431 move toward each other.

[0141] In some possible implementations,

[0142] Each group of the cutting components includes a plurality of groups of cutting blades 3432 arranged circumferentially along the rotating shaft 3431 and on the same plane;

[0143] The cutting blade 3432 includes a mounting portion 34321 with one end mounted on the rotating shaft 3431, and a blade portion 34322 which is arranged at one end of the mounting portion 34321 away from the rotating shaft 3431 and is provided with an arc-shaped cutting edge; a drainage groove 343221 is arranged on the outer side of the blade portion 34322; and a hook tooth 34323 is arranged on the rear side of the arc-shaped cutting edge in the direction of rotation around the rotating shaft 3431.

[0144] In some possible implementations,

[0145] The cutting blades 3432 in each group of cutting assemblies are evenly arranged along the circumference of the rotating shaft 3431 , and a matching cavity for matching with the cutting blades 3432 on the other group of rotating shaft 3431 is formed between the two groups of cutting blades 3432 .

[0146] Furthermore, further improvements are made to the above-mentioned coal slime bin 34 to prevent bridging and arching when the sticky material falls;

[0147] The pneumatic filling system 342 includes an annular air pipe, an air outlet pipe arranged along the circumference of the annular air pipe and connected to the annular air pipe, and an air supply pipe connected to the annular air pipe; the air supply pipe is connected to an external air source.

[0148] Preferably, the axis of the annular trachea is coaxial with the axis of the chamber body 341;

[0149] When transferring viscous materials, the air source delivers compressed gas to the annular air pipe through the air supply pipe, and the compressed gas is discharged into the bin body 341 through the air outlet pipe to remove the conical accumulation angle formed by the viscous materials in the bin body 341 and increase the effective volume of the bin body 341.

[0150] In some possible implementations,

[0151] An air sweeping system 347 is installed on the outside of the silo 341, which is connected to the inside of the silo 341 through an air intake pipe. Furthermore, the air sweeping system 347 is provided at the junction of the straight columnar structure 3412 and the inverted cone structure 3413, and is composed of multiple groups. The air sweeping system 347 is an air cannon or an air rsweep air sweeping system, which is connected to the inside of the silo 341 through an air intake pipe. When the viscous material in the silo does not discharge, the instantaneous blasting force and impact force of compressed air are used to solve the problem of silo wall sticking and clogging. The number and parameters of the air cannon are reasonably selected according to the degree of stickiness of the viscous material.

[0152] In order to avoid the bulging of sticky materials during material dropping;

[0153] A plurality of groups of arc-shaped plates are arranged on the inner wall of the bin body 341 and along its axis. Furthermore, the arc-shaped plates are arranged in the straight columnar structure 3412 .

[0154] Furthermore, each group of arc-shaped plates includes a plurality of groups of arc-shaped plates 3411 arranged along the circumference of the bin body 341 ; the arc-shaped plates 3411 in two adjacent groups of arc-shaped plates are arranged in a staggered manner.

[0155] The arrangement of the arc plate 3411 increases the contact area between the viscous material and the inner wall of the bin body 341, thereby increasing the friction force, changing the flow position of the viscous material, and dispersing its center of gravity, thereby eliminating the arching and bridging of the viscous material due to the center of gravity shift;

[0156] The unloading device 346 is a double screw conveyor, which is controlled by a variable frequency speed regulating motor and can achieve stepless adjustment of the unloading force.

[0157] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. A coal slime conveying system, characterized in that: It includes a feeding system, a material distribution system, a conveying system connected in sequence, a plurality of transfer bins for transferring the coal slime conveyed by the conveying system, and a feeding system respectively connected to the transfer bins and arranged one by one; The transfer bin includes a coal drop pipe three located at the bottom of the conveying system, a crushing device connected to the bottom of the coal drop pipe three, and a coal slime bin connected to the outlet end of the crushing device; the outlet of the coal slime bin is connected to the inlet of the feeding system.

2. A coal slime conveying system according to claim 1, characterized in that: The material distribution system includes a feeding buffer hopper, a coal slurry tearing machine, a filtering component, and a spiral feeder that are connected and arranged in sequence from top to bottom; The feeding buffer hopper and the coal slime tearing machine are located in the feeding system, and the filtering component is installed at the bottom of the feeding system.

3. A coal slime conveying system according to claim 2, characterized in that: The conveying system includes a belt conveying mechanism 1 whose input end is located at the bottom of the screw feeder 1, a belt conveying mechanism 2, a belt conveying mechanism 3, an iron remover located above the belt conveying mechanism 1, and a coal plow located above the belt conveying mechanism 3; A coal drop pipe 1 is provided between the output end of the belt conveyor mechanism 1 and the output end of the belt conveyor mechanism 2; A coal drop pipe 2 is provided between the output end of the belt conveyor mechanism 2 and the output end of the belt conveyor mechanism 3; The coal drop pipe three is located at the bottom of the belt conveyor mechanism three.

4. A coal slime conveying system according to claim 2, characterized in that: The feeding system includes a screw feeder 2 connected to the outlet of the coal slime bin, a screw feeder 3 connected to the outlet of the screw feeder 2 and located below the screw feeder 2, a furnace connected to the outlet of the screw feeder 3 through a coal slime pipe, and a furnace injector arranged on the coal slime pipe.

5. A coal slime conveying system according to claim 4, characterized in that: A manual shut-off valve and a pneumatic or electric shut-off valve are arranged in sequence between the inlet of the screw feeder 1 and the outlet of the coal slime bin, and between the inlet of the screw feeder 1 and the outlet of the screw feeder 1.

6. A coal slime conveying system according to any one of claims 1 to 5, characterized in that: The coal slime silo comprises a silo with an inlet at the top, a pneumatic filling system, a scattering mechanism, a material shifting mechanism, a discharge device, and an air sweeping system installed outside the silo and connected to the inside of the silo; the pneumatic filling system, the scattering mechanism, the material shifting mechanism and the discharge device are installed in the silo and arranged from top to bottom; the pneumatic filling system is located below the inlet; the discharge device is externally connected to a material drop pipe; The warehouse body is a columnar structure, including a straight columnar structure with an inlet at the top and an inverted cone structure coaxially arranged and connected to the straight columnar structure; the height of the straight columnar structure along its axial direction is A, and the height of the inverted cone along its axial direction is B, wherein A:B=0.5-1.

7. A coal slime conveying system according to claim 6, characterized in that: The straight columnar structure is cylindrical or square, and the inverted cone structure is a truncated cone connected to a cylindrical shape or a prism connected to a square column; wherein the small end of the inverted cone structure is connected to the straight columnar structure; A partition is arranged above the unloading device, and a chamber for installing the unloading device is formed between the partition and the bottom of the warehouse body; a feeding port connected with the chamber and located directly above the unloading device is arranged on the partition.

8. A coal slime conveying system according to claim 7, characterized in that: The material-digging mechanism comprises a material-digging plate coaxially arranged with the inverted cone structure and located above the partition, a driving motor located outside the bottom of the bin body and drivingly connected to the material-digging plate, and a material-digging arm connected to the material-digging plate and drivingly connected to the output shaft of the driving motor; The material-digging arms are divided into multiple groups and are arranged along the circumference of the material-digging disc; the material-digging arms include an elastic material-digging rod with one end connected to the material-digging disc, a material-digging blade installed on the material-digging rod, and a scraper hook arranged at the other end of the material-digging rod; the scraper hook is connected to the material-digging disc through an elastic member.

9. A coal slime conveying system according to claim 7, characterized in that: The material-shifting mechanism comprises a material-shifting frame installed in the inverted cone structure and located above the partition, and a linear drive mechanism located outside the bin body and used for controlling the material-shifting frame to make linear motion.

10. A coal slime conveying system according to claim 8 or 9, characterized in that: The disintegrating mechanism is installed in the inverted cone structure, including two sets of rotating shafts rotatably installed in the warehouse body and arranged in parallel, cutting components respectively installed on the two sets of rotating shafts and arranged along the length direction of the rotating shafts, and a rotating shaft driving device connected to the two sets of rotating shafts and used to control the two sets of rotating shafts to move toward each other; the two sets of rotating shafts move toward each other; Each group of the cutting components includes a plurality of groups of cutting blades arranged along the circumference of the rotating shaft and on the same plane; The cutting blade comprises a mounting portion mounted on the rotating shaft at one end, a blade portion arranged at one end of the mounting portion away from the rotating shaft and provided with an arc-shaped cutting edge; a drainage groove is arranged on the outer side of the blade portion; and hook teeth are arranged on the rear side of the arc-shaped cutting edge in the direction of rotation around the rotating shaft; The cutting blades in each group of cutting assemblies are evenly arranged along the circumference of the rotating shaft, and a matching cavity for matching with the cutting blades on the other group of rotating shaft is formed between the two groups of cutting blades.

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