Coal mixing system

Abstract

The utility model discloses a coal mixing system, which relates to the technical field of coal blending and comprises a feeding device, a mixing device and a receiving device. The feeding device comprises two feeding belts used for conveying different coal materials, and the discharging ends of the two feeding belts are distributed in a spaced and staggered mode in the vertical direction. The material mixing device comprises a support and a material mixing barrel mounted on the support, a material mixing space is formed in the material mixing barrel, and an inlet and an outlet which are communicated with the material mixing space are formed in the top and the bottom of the material mixing barrel respectively; a plurality of material mixing mechanisms which are sequentially arranged from top to bottom are arranged in the material mixing space, a material mixing section which is obliquely arranged downwards is formed on each material mixing mechanism, and the plurality of material mixing sections are sequentially communicated from top to bottom to form a continuous material mixing path; different coal materials entering the material mixing space from the inlet can flow along the material mixing path under the action of self weight and are mixed in the flowing process; and the material receiving device is arranged below the outlet. The coal mixing system is low in cost, more uniform in mixing and better in reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal blending technical field especially relates to a coal material mixing system. BACKGROUND

[0002] Because partial coal material exists the problem that the content of alkaline metal (sodium, potassium, calcium, iron) is higher, because the characteristic that the content of alkali metal is high, will lead to the serious situation such as coking, contamination of the boiler that burns this coal material, this not only will reduce the thermal efficiency of coal-fired unit, will also lead to the safety of equipment reduces.

[0003] At present, to solve the above technical problem, mainly adopt the method of coal blending to reduce the problem such as coking, contamination of boiler, and the method of coal blending is mainly through blending different coal, reduces the content of alkali metal of coal into the furnace.

[0004] And at present, in the process of mixing coal powder in coal conveying, mainly adopt the special coal blending tank, or adopt the means such as direct mixing of coal belt, and the coal blending tank needs to occupy large space, needs motor drive and the structure is complex, the cost is higher, and the direct mixing of belt is prone to the situation that local mixing is uneven, and the reliability is poor. UTILITY MODEL CONTENT

[0005] The utility model discloses a coal material mixing system, which aims to solve the technical problem of high cost and poor reliability of the coal material mixing method in the existing coal conveying process.

[0006] To achieve the above object, the utility model provides a coal material mixing system, which comprises:

[0007] A feeding device comprising two feeding belts for conveying different coal materials, the discharge ends of the two feeding belts are vertically spaced and staggered distributed;

[0008] A mixing device comprising a support and a mixing cylinder mounted on the support, the mixing cylinder forms a mixing space, the top and bottom of the mixing cylinder are respectively provided with an inlet and an outlet communicating with the mixing space, the inlet is arranged below the two discharge ends to enable different coal materials falling from the two discharge ends to enter the mixing space from the inlet, a plurality of mixing mechanisms are arranged in the mixing space from top to bottom, each mixing mechanism forms a downwardly inclined mixing section, and the plurality of mixing sections are sequentially communicated from top to bottom to form a continuous mixing path, so that different coal materials entering the mixing space from the inlet flow along the mixing path under the action of gravity and mix during the flowing process.

[0009] A material receiving device is arranged below the outlet, and the coal material mixed in the mixing space falls from the outlet to the material receiving device.

[0010] In an embodiment, each of the mixing mechanisms comprises two guide plates, the two guide plates in each of the mixing mechanisms are arranged in cross and form two material passing openings, two adjacent mixing sections are communicated through the two material passing openings, the top surface of each of the guide plates is arranged in downward inclination, the two top surfaces in each of the mixing mechanisms form a mixing section, and the coal material can flow along the top surfaces under the action of gravity and flow to the top surface of the guide plate below from the material passing opening.

[0011] In an embodiment, each of the guide plates comprises an arc edge and a straight edge connecting two ends of the arc edge, the straight edges of the two guide plates in the same mixing mechanism are arranged in cross and form two material passing openings, and the arc edge of each of the guide plates is connected with the inner wall of the mixing space and matches the profile.

[0012] In an embodiment, the two guide plates in each of the mixing mechanisms are respectively a first guide plate and a second guide plate, a plurality of the first guide plates are arranged in vertical sequence and in interval, and the inclination directions of the top surfaces of the plurality of the first guide plates are the same; a plurality of the second guide plates are arranged in vertical sequence and in interval, and the inclination directions of the top surfaces of the plurality of the second guide plates are the same.

[0013] In an embodiment, the mixing cylinder comprises a mixing section and a discharging section connected to the bottom of the mixing end, the mixing section forms the mixing space, the top of the mixing section is provided with the inlet, the bottom of the discharging section is provided with the outlet, the discharging section forms a discharging channel communicated with the mixing space, and the discharging channel gradually decreases from top to bottom.

[0014] In an embodiment, the support comprises a support rod and two support plates arranged in vertical interval on the support rod, the two support plates are respectively a first support plate and a second support plate below the first support plate; wherein the mixing section penetrates through and is limited by the first support plate, and the discharging section penetrates through and is limited by the second support plate.

[0015] In an embodiment, the support rod is provided with a plurality of support rods, part of the support rods are first support rods, and the other part of the support rods are second support rods, each of the first support rods is arranged between the first support plate and the second support plate, and the second support plate is supported on the top of each of the second support rods.

[0016] The bottom of each of the second support rods is provided with a universal wheel.

[0017] In an embodiment, the material receiving device comprises a conveying belt, and the material receiving end of the conveying belt is arranged at a position below the outlet.

[0018] In an embodiment, a belt scale is arranged for weighing the coal materials corresponding to each of the conveying belts.

[0019] In an embodiment, the top of the mixing cylinder is provided with a plurality of spray nozzles, and the plurality of spray nozzles are arranged around the inlet.

[0020] The coal material mixing system of the utility model, through adopting two conveying belts to convey different coal materials to above the inlet, facilitates to separately control the use amount of different coal materials, the two conveying belts are arranged above and below the inlet, so that the two kinds of coal materials can be preliminarily mixed in the process of falling from the discharging end to the inlet, and the two kinds of coal materials entering the mixing space flow along the mixing sections of the plurality of mixing mechanisms in turn under the action of gravity, and further mixing is completed in the process of flowing, the step-by-step mixing mode can significantly improve the uniformity of coal material mixing, avoids the problem of partial uneven mixing, compared with the traditional coal blending tank mixing mode, the coal material mixing system does not need to adopt a motor to drive the mixing mechanism, adopts the gravity of the coal materials as a power source for mixing, saves the power consumption to a certain extent, is low in cost, and the motor structure is simpler, compared with the belt mixing mode, the coal material mixing system can realize multi-stage mixing, so that the coal material mixing is also more uniform and has better reliability. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings from the structures shown in the drawings without creating creative labor.

[0022] Figure 1 The structure schematic view of an embodiment of the coal material mixing system provided by the utility model;

[0023] Figure 2 The structure schematic view of the mixing device in an embodiment of the coal material mixing system provided by the utility model;

[0024] Figure 3 The front perspective view of the mixing device in an embodiment of the coal material mixing system provided by the utility model.

[0025] Figure 4 The right perspective view of the mixing device in an embodiment of the coal material mixing system provided by the utility model.

[0026] Brief Description of Drawings

[0027] 100, coal mixing system; 1, feeding device; 11, feeding belt; 12, belt scale; 2, mixing device; 21, support; 211, support rod; 211a, first support rod; 211b, second support rod; 212, support plate; 212a, first support plate; 212b, second support plate; 213, universal wheel; 22, mixing cylinder; 221, inlet; 222, outlet; 223, mixing space; 224, mixing mechanism; 2241, guide plate; 2241a, first guide plate; 2241b, second guide plate; 2242, material passing port; 225, mixing section; 226, discharging section; 227, spray nozzle; 3, receiving device; 31, conveying belt.

[0028] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0031] In addition, if the embodiments of the present application involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0032] The utility model provides a coal material mixing system 100.

[0033] Please refer to Figures 1-4 In the utility model one embodiment, the coal material mixing system 100, including feeding device 1, mixing device 2 and receiving device 3, feeding device 1 includes two feeding belts 11 for conveying different coal materials, and the discharge end of two feeding belts 11 is distributed along the vertical interval and staggered, mixing device 2 includes support 21 and installs on the mixing cylinder 22 of support 21, and mixing cylinder 22 forms mixing space 223, and the top and bottom of mixing cylinder 22 are provided with inlet 221 and outlet 222 that communicate with mixing space 223 respectively, and inlet 221 is set below the two discharge ends to make the different coal materials falling from two discharge ends can enter mixing space 223 from inlet 221, mixing space 223 is provided with a plurality of mixing mechanisms 224 sequentially arranged from top to bottom, and each mixing mechanism 224 forms the mixing section 225 that is arranged downwardly inclined, and a plurality of mixing sections 225 are sequentially communicated from top to bottom as continuous mixing path, so that the different coal materials entering mixing space 223 from inlet 221 can flow along the mixing path under the action of gravity and mix in the flowing process, and receiving device 3 is set below outlet 222, and the coal material mixed in mixing space 223 falls from outlet 222 to receiving device 3.

[0034] The coal material mixing system 100 of the utility model, by adopting two feeding belts 11 to convey different coal materials to the top of inlet 221, it is convenient to control the use of different coal materials separately, and two feeding belts 11 are set above inlet 221, so that two kinds of coal materials can be preliminarily mixed in the process of falling from the discharge end to inlet 221, and two kinds of coal materials in mixing space 223 flow along the mixing section 225 of a plurality of mixing mechanisms 224 under the action of gravity, and further mixing is completed in the flowing process, and the uniformity of coal material mixing can be significantly improved by this step-by-step mixing mode, the problem of partial mixing is avoided, compared with the traditional coal blending tank mixing mode, the coal material mixing system 100 does not need to adopt motor-driven mixing mechanism 224, and the gravity of coal material is used as the power source of mixing, which saves the power consumption to a certain extent, and the cost is lower, and the motor structure is simpler, compared with the belt mixing mode, the coal material mixing system 100 can realize multi-stage mixing, so that the coal material mixing is more uniform, and the reliability is better.

[0035] In an embodiment, each mixing mechanism 224 includes two guide plates 2241, the two guide plates 2241 in each mixing mechanism 224 are arranged in a cross manner and form two material passing openings 2242, two adjacent mixing sections 225 are communicated through the two material passing openings 2242, and the top surface of each guide plate 2241 is arranged in a downward inclined manner, the top surfaces of the two guide plates 2241 in each mixing mechanism 224 form a mixing section 225, and the coal material can flow along the top surface under the action of gravity and flow to the top surface of the guide plate 2241 below through the corresponding material passing opening 2242.

[0036] It can be understood that each mixing mechanism 224 includes two guide plates 2241 arranged in a cross manner, the guide plates 2241 arranged in a cross manner divide the mixing space 223 into multiple staggered channels, and the coal material on the mixing mechanism 224 above enters the next mixing mechanism 224 through the corresponding material passing opening 2242, the coal material is repeatedly divided and recombined during the flow process, which can significantly increase the contact area and mixing times between different coal materials, thereby greatly improving the mixing uniformity; and the coal material collides with each other during the falling process to cause dispersion, which can further promote the sufficient mixing between different coal materials.

[0037] Each mixing section 225 is formed by the top surfaces of the two guide plates 2241, and the top surfaces are downward inclined inclined surfaces, which can make the coal material flow quickly under the action of gravity without the need of additional power support. Meanwhile, the cross guide plates 2241 increase the overall flow path of the coal material from the inlet 221 to the outlet 222, increase the mixing time, and are more conducive to improving the mixing effect.

[0038] In addition, it can be understood that the two guide plates 2241 are beneficial to dispersing the coal material entering the next mixing mechanism 224 from different material passing openings 2242, and the coal material is mixed again when falling from different material passing openings 2242, and is dispersed by the two guide plates 2241 after mixing, and the process is repeated multiple times in the mixing space 223, so that the coal material is dispersed and mixed multiple times to achieve a better mixing effect.

[0039] In an embodiment, each guide plate 2241 includes an arc edge and a straight edge connected to both ends of the arc edge, the straight edges of the two guide plates 2241 in the same mixing mechanism 224 are arranged in a cross manner and form two material passing openings 2242, and the arc edge of each guide plate 2241 is connected to the inner wall of the mixing space 223 and matches the contour.

[0040] It can be understood that the arc edge of the guide plate 2241 closely fits the inner wall of the mixing space 223, ensuring that the flow path of the coal in the mixing space 223 is smoother, avoiding the flow dead angle that may be caused by the traditional flat design; this design can effectively prevent the accumulation or retention of coal near the inner wall of the mixing space 223, thereby reducing coal residue; the two straight edges intersect, thereby preventing the coal from directly avoiding the guide plate 2241 and falling straight down after entering the mixing space 223.

[0041] In an embodiment, the two guide plates 2241 in each mixing mechanism 224 are respectively a first guide plate 2241a and a second guide plate 2241b, a plurality of first guide plates 2241a are arranged vertically and spaced apart in sequence, and the top surfaces of the plurality of first guide plates 2241a have the same inclination direction, and a plurality of second guide plates 2241b are arranged vertically and spaced apart in sequence, and the top surfaces of the plurality of second guide plates 2241b have the same inclination direction.

[0042] It can be understood that the consistency of the inclination direction of the top surfaces of the first guide plate 2241a and the second guide plate 2241b not only forms an orderly mixing path, improves the flow and mixing efficiency of the coal, but also enhances the cross-mixing effect, while reducing the risk of accumulation and blockage.

[0043] In an embodiment, the mixing cylinder 22 includes a mixing section 225 and a discharge section 226 connected to the bottom of the mixing end, the mixing section 225 forms a mixing space 223, the top of the mixing section 225 is provided with an inlet 221, the bottom of the discharge section 226 is provided with an outlet 222, the discharge section 226 forms a discharging channel communicating with the mixing space 223, and the discharging channel gradually decreases from top to bottom.

[0044] The discharging channel of the discharge section 226 gradually decreases from top to bottom, and this tapered design can effectively guide the coal to flow quickly and smoothly to the outlet 222 under the action of gravity, avoid the accumulation or retention of coal in the discharge section 226, and facilitate the collection of mixed coal.

[0045] In an embodiment, the support 21 includes a support rod 211 and two support plates 212 vertically spaced apart on the support rod 211, the two support plates 212 are respectively a first support plate 212a and a second support plate 212b located below the first support plate 212a; wherein the mixing section 225 penetrates and is limited in the first support plate 212a, and the discharge section 226 penetrates and is limited in the second support plate 212b.

[0046] It can be understood that the mixing section 225 penetrates and is limited in the first support plate 212a, and the discharging section 226 penetrates and is limited in the second support plate 212b. This layered fixed design can firmly mount the mixing cylinder 22 on the support 21, significantly enhancing the stability of the overall structure. The support plates 212 provide support and limiting for the mixing section 225 and the discharging section 226 respectively, avoiding shaking or deviation caused by coal flow or external vibration.

[0047] Specifically, the outer diameter of the discharging section 226 gradually decreases from top to bottom, and the through hole opened on the second support plate 212b only allows a part of the discharging section 226 to pass through the through hole from top to bottom, thereby limiting the discharging section 226 on the second support plate 212b, so that the mixing cylinder 22 remains stable under the action of gravity. The through hole opened on the first support plate 212a matches the outer diameter profile of the mixing section 225, thereby further maintaining the stability of the mixing cylinder 22 when mixing coal.

[0048] In an embodiment, the support rods 211 are provided in multiple, some of which are first support rods 211a, and some of which are second support rods 211b. Each first support rod 211a is arranged between the first support plate 212a and the second support plate 212b, and the second support plate 212b is supported on the top of each second support rod 211b. The bottom of each second support rod 211b is provided with a universal wheel 213.

[0049] It can be understood that the support rods 211 and the support plates are staggered, which can keep the relative positions of the two support plates stable and have better structural stability. The universal wheels 213 are arranged at the bottom of the second support rods 211b, so that the entire mixing system can be easily moved to a designated position, adapt to different working positions or site requirements, and be conveniently and quickly put into use.

[0050] In an embodiment, the receiving device 3 includes a conveying belt, and the receiving end of the conveying belt is arranged at a position below the outlet 222. It can be understood that the mixed coal can be directly collected by the conveying belt, which is convenient for direct transportation and input into the next process, such as direct input into a boiler for combustion, thereby saving part of the intermediate process and reducing cost.

[0051] In an embodiment, a belt scale 12 for weighing coal is arranged corresponding to each feeding belt 11.

[0052] Specifically, the feeding device 1 further includes two driving members, each feeding belt 11 is arranged around two synchronous pulleys, and the two driving members are respectively used to drive the synchronous pulleys corresponding to the two feeding belts 11 to rotate, so as to drive the corresponding feeding belts 11 to convey coal. The belt scale 12 is located between the corresponding two synchronous pulleys.

[0053] It can be understood that the two driving members are respectively used for driving the two synchronous belts to run, and the different coal conveying capacities can be accurately adjusted; and the belt scale 12 is arranged, and the weight of the coal on the corresponding feeding belt 11 can be weighed in real time, so that the blending ratio of different coals can be accurately controlled.

[0054] It should be noted that the driving member can adopt the driving motor in the prior art, and the belt scale 12 adopts the belt scale 12 in the prior art.

[0055] In an embodiment, the top of the mixing cylinder 22 is provided with a plurality of spray nozzles 227, and the plurality of spray nozzles 227 are arranged at intervals around the inlet 221.

[0056] It can be understood that in the process of the coal entering the mixing cylinder 22, the spray nozzles 227 can spray water mist to the area of the inlet 221, effectively adsorb and capture the dust particles in the coal, reduce dust flying, and be beneficial to protect the working environment and reduce air pollution.

[0057] The above is only an exemplary embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A coal blending system, characterized by, The coal mixing system comprises: a feeding device comprising two feeding belts for feeding different coal materials, the two feeding belts being vertically spaced and staggered; a mixing device comprising a support and a mixing cylinder mounted on the support, the mixing cylinder defining a mixing space, the mixing cylinder having an inlet and an outlet at the top and the bottom thereof respectively, the inlet being arranged below the two feeding ends so that the different coal materials falling from the two feeding ends can enter the mixing space through the inlet, the mixing space being provided with a plurality of mixing mechanisms arranged one above another, each of the mixing mechanisms defining a mixing section arranged downwardly, the plurality of mixing sections being sequentially communicated to form a continuous mixing path, so that the different coal materials entering the mixing space through the inlet can flow along the mixing path under the action of gravity and be mixed in the process of flowing; a receiving device arranged below the outlet, the coal materials mixed in the mixing space falling from the outlet to the receiving device.

2. The coal blending system of claim 1, wherein, Each of the mixing mechanisms comprises two guide plates, the two guide plates in each of the mixing mechanisms being arranged in cross and defining two material passing openings, the two material passing openings being arranged between two adjacent mixing sections, the top surface of each of the guide plates being arranged downwardly, the two top surfaces in each of the mixing mechanisms defining a mixing section, the coal materials flowing along the top surfaces under the action of gravity and flowing from the material passing openings to the top surfaces of the guide plates below.

3. The coal blending system of claim 2, wherein, Each of the guide plates comprises an arc edge and a straight edge connecting two ends of the arc edge, the straight edges of the two guide plates in the same mixing mechanism being arranged in cross and defining two material passing openings, the arc edge of each of the guide plates being connected with the inner wall of the mixing space and matching the profile of the inner wall.

4. The coal blending system of claim 2, wherein, The two guide plates in each of the mixing mechanisms are respectively a first guide plate and a second guide plate, the first guide plates being vertically spaced one above another and the top surfaces of the first guide plates being arranged in the same direction, the second guide plates being vertically spaced one above another and the top surfaces of the second guide plates being arranged in the same direction.

5. The coal blending system of claim 1, wherein, The mixing cylinder comprises a mixing section and a discharging section connected to the bottom of the mixing section, the mixing section defining the mixing space, the top of the mixing section being provided with the inlet, the bottom of the discharging section being provided with the outlet, the discharging section defining a discharging channel communicated with the mixing space, the discharging channel being gradually reduced from top to bottom.

6. The coal blending system of claim 5, wherein, The support comprises a support rod and two support plates vertically spaced on the support rod, the two support plates being respectively a first support plate and a second support plate below the first support plate, the mixing section penetrating through the first support plate and being limited by the first support plate, the discharging section penetrating through the second support plate and being limited by the second support plate.

7. The coal mixing system according to claim 6, wherein The support rods are provided in plurality, wherein a part of the support rods are first support rods, and another part of the support rods are second support rods, each of the first support rods is arranged between the first support plate and the second support plate, and the second support plate is supported on the top of each of the second support rods. The bottom of each of the second support rods is provided with a universal wheel.

8. The coal blending system of any one of claims 1 to 7, wherein, The material receiving device comprises a conveying belt, and the material receiving ends of the conveying belt are arranged at intervals below the outlet.

9. The coal blending system of any one of claims 1 to 7, wherein, A belt scale is arranged corresponding to each of the conveying belts to weigh the coal materials.

10. The coal blending system of any one of claims 1 to 7, wherein, The top of the mixing cylinder is provided with a plurality of spray nozzles, and the spray nozzles are arranged at intervals around the inlet.

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