Conveying dust removal system

Abstract

The utility model relates to the technical field of dust removal, and provides a conveying dust removal system which comprises an input conveying device, an output conveying device and a grading flow bin, the output conveying device is arranged below the input conveying device, and a gap is formed between the output conveying device and the input conveying device; the grading flowing bin covers the tail end of the input conveying device and the outer side of the front end of the output conveying device, a flow dividing structure is arranged at the position, between the input conveying device and the output conveying device, in the grading flowing bin, the flow dividing structure comprises at least one sieve plate, and the sieve plates are obliquely arranged and provided with through holes. According to the utility model, the dispersion and raising of dust can be effectively reduced, the dust raising problem is solved from the source, and the dust treatment requirement in the falling process of biomass fuel is met.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal, in particular to a conveying dust removal system. Background Art

[0002] As a "zero-carbon emission" renewable energy source, biomass fuel has the advantages of low pollutant emissions, abundant and renewable resources, and is one of the potential alternative energy sources for fossil fuels. It has been widely used in various energy production activities, such as large-scale power generation, cogeneration, and industrial / civil heating of various scales. However, biomass fuels are complex in variety and there are many problems in the production and transportation process.

[0003] The biomass fuel transportation system is a major source of dust pollution due to its long distance and many dust-generating links. The biomass fuel transportation process (especially when there is a height difference during the transportation process and the biomass fuel needs to fall) is prone to generate a large amount of dust, which is harmful to the health of on-site operators. At the same time, when the dust concentration in confined spaces such as silos and tunnels is high, it is very easy to cause dust explosions, endangering the lives of on-site operators and causing serious economic and property losses.

[0004] In the prior art, on the one hand, fans are used to discharge dust, but this method has low dust removal efficiency and takes a long time; on the other hand, spraying is used to reduce dust, but this method easily increases the water content of biomass fuel, thereby increasing the energy consumption of the boiler. It can be seen that the existing dust removal methods have defects and cannot well meet the dust treatment needs of the biomass fuel falling process. Utility Model Content

[0005] The utility model provides a conveying and dust removal system, which is used to solve the problem that the prior art cannot well meet the dust treatment demand in the biomass fuel falling process.

[0006] The utility model provides a conveying and dust removal system, comprising:

[0007] input conveyor;

[0008] An output conveying device, disposed below the input conveying device and spaced apart from the input conveying device;

[0009] A grading flow bin is covered at the end of the input conveying device and the outside of the front end of the output conveying device. A diversion structure is arranged at a position between the input conveying device and the output conveying device in the grading flow bin. The diversion structure includes at least one sieve plate, which is arranged obliquely and has through holes.

[0010] According to a conveying and dust removal system provided by the utility model, the diversion structure includes a first diversion plate group, the first diversion plate group includes a pair of sieve plates, the pair of sieve plates in the first diversion plate group are connected at the top and gradually tilt away from each other from top to bottom.

[0011] According to a conveying and dust removal system provided by the utility model, the diversion structure also includes a second diversion plate group, the second diversion plate group includes a pair of the sieve plates, the pair of the sieve plates of the second diversion plate group are gradually inclined from top to bottom towards each other, and a gap is formed at the bottom.

[0012] According to a conveying and dust removal system provided by the utility model, at least one of the first diverter plate group and the second diverter plate group is provided in plurality, and the first diverter plate group and the second diverter plate group are alternately arranged from top to bottom.

[0013] According to a conveying and dust removal system provided by the utility model, it also includes:

[0014] Dust removal equipment;

[0015] An air duct, one end of which is connected to the inlet of the dust removal device, and the other end of which is connected to the inner cavity of the graded flow bin;

[0016] The induced draft fan is arranged on the air duct.

[0017] According to a conveying and dust removal system provided by the utility model, it also includes:

[0018] A dust concentration sensor is arranged on the inner wall of the grading flow bin;

[0019] A controller is connected to the dust concentration sensor and the induced draft fan respectively, and the controller is configured to control the operation of the induced draft fan based on a detection signal of the dust concentration sensor.

[0020] According to a conveying and dust removal system provided by the utility model, the dust concentration sensor is located on the top of the graded flow bin.

[0021] According to a conveying dust removal system provided by the utility model, the dust removal equipment is one of a bag dust collector and a cyclone separator or a combination of both.

[0022] According to a conveying and dust removal system provided by the utility model, it also includes a dust cover, which is arranged at the bottom of the grading flow bin and is located at the position where the grading flow bin and the output conveying device are connected.

[0023] According to a conveying and dust removal system provided by the utility model, the diameter of the through hole is less than 6 mm.

[0024] The conveying and dust removal system provided by the utility model can realize the graded flow of biomass particles and dust through the shunt structure in the graded flow bin during the process of biomass fuel falling from the input conveying device to the output conveying device, wherein the moving path of the biomass particles is relatively large, and after passing through the shunt structure, they are located above the dust, thereby restricting the dust during the descent process and effectively reducing the scattering of dust. At the same time, the shunt structure itself can also block the dust below and prevent the dust from rising. In addition, the blocking effect of the shunt structure can reduce the height difference of a single descent, further reducing the rising of dust. Therefore, the utility model can effectively reduce the dispersion and rising of dust, solve the dust problem from the root, and meet the dust treatment needs during the falling process of biomass fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of a conveying and dust removal system provided by the utility model in the front view direction;

[0027] Figure 2 It is a schematic diagram of the structure of a conveying and dust removal system provided by the utility model in a side view direction;

[0028] Figure 3 This is a schematic diagram of the sieve plate structure in a conveying and dust removal system provided by the utility model;

[0029] Reference numerals:

[0030] 1. Input conveying device; 2. Grading flow bin; 3. Diversion structure; 31. First diversion plate group; 32. Second diversion plate group; 4. Dust cover; 5. Output conveying device; 6. Induced draft fan; 7. Dust concentration sensor; 8. Air duct; 9. Dust removal equipment; 10. Screen plate; 101. Through hole. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Combine the following Figures 1 to 3 The utility model is described in detail.

[0033] The conveying and dust removal system includes an input conveying device 1, an output conveying device 5 and a graded flow bin 2; the output conveying device 5 is arranged below the input conveying device 1, and forms a gap between the input conveying device 1; the graded flow bin 2 is covered at the end of the input conveying device 1 and the outside of the front end of the output conveying device 5, and a diversion structure 3 is arranged at a position between the input conveying device 1 and the output conveying device 5 in the graded flow bin 2, and the diversion structure 3 includes at least one sieve plate 10, the sieve plate 10 is inclined and is provided with a through hole 101.

[0034] The grading flow bin 2 surrounds the end (i.e., the discharge end) of the input conveyor 1 and the front end (i.e., the material taking end) of the output conveyor 5, forming a closed or semi-closed space structure to prevent dust from spilling out. The sieve plate 10 of the diversion structure 3 is evenly provided with through holes 101 to allow finer dust particles to pass through, while the biomass fuel particles cannot pass through these through holes 101 due to their large size, so they can only roll down along the surface of the sieve plate 10.

[0035] The conveying and dust removal system provided by the utility model can realize the graded flow of biomass particles and dust through the diverter structure 3 in the graded flow bin 2 during the process of the biomass fuel falling from the input conveyor 1 to the output conveyor 5. The biomass particles roll down along the sieve plate 10, and the dust passes through the through hole 101. The movement path of the biomass particles is relatively large, and after passing through the diverter structure 3, they are located above the dust, thereby restricting the dust during the descent process and effectively reducing the dust scattering. At the same time, the diverter structure 3 itself can also block the dust below and prevent the dust from rising. In addition, the blocking effect of the diverter structure 3 can reduce the height difference of a single descent, further reducing the dust rising. Therefore, the utility model can effectively reduce the dispersion and rising of dust, solve the dust problem from the root, and meet the dust treatment needs during the falling process of biomass fuel.

[0036] Combination Figure 2 In some embodiments of the present invention, the diversion structure 3 includes a first diversion plate group 31, and the first diversion plate group 31 includes a pair of sieve plates 10. The tops of the pair of sieve plates 10 of the first diversion plate group 31 are connected and gradually tilted away from each other from top to bottom.

[0037] The two sieve plates 10 of the first diverter plate group 31 are connected to each other at the top to form a tightly fitted state, and then show a trend of gradually increasing the distance between them from top to bottom, that is, gradually moving away from each other along the inclined direction.

[0038] When the biomass fuel falls to the position of the first diverter plate group 31, it is blocked by the first diverter plate group 31 and separated to both sides from the joint position of a pair of sieve plates 10 of the first diverter plate group 31, which can reduce the amount of material received on one side, improve the screening effect, and reduce the force on one side.

[0039] When the biomass fuel particles enter the graded flow bin 2 through the input conveyor 1 and pass through the first diverter plate group 31, due to the inclined characteristics of the sieve plate 10, the biomass particles will roll down along the inclined surface of the sieve plate 10 instead of falling directly vertically, which helps to slow down the falling speed and disperse the particle distribution. At the same time, since there are specially designed through holes 101 on the sieve plate 10, fine dust particles are allowed to pass through, so the biomass particles and dust can be graded and separated during the falling process.

[0040] In some embodiments of the present invention, the diversion structure 3 also includes a second diversion plate group 32, which includes a pair of sieve plates 10. The pair of sieve plates 10 of the second diversion plate group 32 are gradually inclined toward each other from top to bottom, and a gap is formed at the bottom.

[0041] The interval between the pair of sieve plates 10 in the second diverter plate group 32 can be used as a channel for the biomass fuel to converge and fall. When the biomass fuel falls to the position of the second diverter plate group 32, it is blocked by the pair of sieve plates 10 in the second diverter plate group 32, and the biomass fuel particles roll down along the sieve plates 10 to the middle, while the dust passes through the through holes 101.

[0042] In this embodiment, the distance between the pair of sieve plates 10 of the second diverter plate group 32 gradually decreases from top to bottom until a predetermined interval is formed at the bottom. With such a structural design, after the biomass fuel is initially separated by the first diverter plate group 31, when it continues to fall to the position of the second diverter plate group 32, the biomass fuel particles will be guided by the second diverter plate group 32, and will gather and roll down along the sieve plates 10 toward the center, forming a more concentrated and orderly flow state.

[0043] Since the second diverter plate group 32 is also provided with through holes 101, fine dust can continue to be evacuated downward through this channel. In this way, not only the classification and separation effect of biomass particles and dust is further enhanced, but also the dust of biomass fuel in the falling process is effectively suppressed and collected. This design optimizes the dust control performance during the biomass fuel transportation process, reduces the pressure of subsequent dust removal steps, and thus improves the dust removal efficiency and safety of the entire system.

[0044] In some embodiments of the present invention, at least one of the first diverter plate set 31 and the second diverter plate set 32 ​​is provided in plurality, and the first diverter plate set 31 and the second diverter plate set 32 ​​are alternately arranged from top to bottom.

[0045] Optionally, a plurality of the first diverter plate groups 31 and the second diverter plate groups 32 are respectively provided, and the first diverter plate groups 31 and the second diverter plate groups 32 are alternately arranged from top to bottom.

[0046] The sieve plates 10 in the first diverter plate group 31 are connected at the top and gradually spread out to both sides from top to bottom through an inclined design, which promotes the biomass particles to disperse and slide along the sieve plates 10 during the falling process, and allows the dust to be discharged downward through the through holes 101 on the sieve plates 10, thereby achieving the preliminary separation of the biomass particles and the dust. The sieve plates 10 in the second diverter plate group 32 gradually move closer from top to bottom, leaving a gap at the bottom. When the biomass particles pass through the second diverter plate group 32, they are subject to the gathering effect of the sieve plates 10, causing them to converge and roll down in the middle, further optimizing the separation effect of the biomass particles and the dust, while also ensuring that the dust will not float in the opposite direction. Through such a design, multiple groups of first diverter plate groups 31 and second diverter plate groups 32 are alternately coordinated to form a series of graded screening areas, and each level separates the dust of the biomass fuel more finely, thereby greatly improving the dust prevention capability.

[0047] See you later Figure 1 In some embodiments of the present invention, the conveying dust removal system further includes a dust removal device 9, an air duct 8 and an induced draft fan 6. One end of the air duct 8 is connected to the inlet of the dust removal device 9, and the other end is connected to the inner cavity of the graded flow bin 2; the induced draft fan 6 is arranged in the air duct 8.

[0048] The induced draft fan 6 in this embodiment can be arranged in the air duct 8, and can also be arranged at the connection position of the branch pipe and the graded flow bin 2. When the induced draft fan 6 is running, negative pressure can be generated, so that the air in the graded flow bin 2 enters the dust removal equipment 9 through the air duct 8.

[0049] When the biomass fuel particles are transported, they are graded and separated by the sieve plates 10 in the graded flow bin 2, which will generate a small amount of raised dust. The raised dust can be sucked into the dust removal device 9 through the air duct 8 under the action of the induced draft fan 6. The dust removal device 9 captures the dust particles in the dust-containing gas, and the purified air is discharged through the air duct 8, thereby realizing the efficient collection and purification of the dust generated in the biomass transportation process, effectively solving the dust pollution problem in the biomass transportation process, ensuring the safety and cleanliness of the production environment, and also improving the comprehensive benefits of biomass energy utilization.

[0050] By adopting the above method, when the dust concentration in the graded flow bin 2 is high, the dust can be cleaned in time, thereby effectively improving safety.

[0051] In some embodiments of the present invention, the conveying and dust removal system further includes a dust concentration sensor 7 and a controller. The dust concentration sensor 7 is arranged on the inner wall of the graded flow bin 2; the controller is respectively connected to the dust concentration sensor 7 and the induced draft fan 6, and the controller is configured to control the operation of the induced draft fan 6 based on the detection signal of the dust concentration sensor 7.

[0052] The conveying and dust removal system further integrates intelligent components such as dust concentration sensors 7 and controllers to achieve accurate monitoring and dynamic regulation of dust emissions.

[0053] Among them, the dust concentration sensor 7 is embedded on the inner wall of the graded flow bin 2, and can detect the change of dust concentration in the bin in real time. The dust concentration sensor 7 can be an optical dust concentration sensor 7, a charge induction dust concentration sensor 7, a piezoresistive dust concentration sensor 7, a mass flow type dust concentration sensor 7, and a capacitive dust concentration sensor 7, etc., which are not specifically limited here. The selected dust concentration sensor 7 should be suitable for the biomass dust characteristics and environmental conditions to ensure long-term stable operation in the bin, accurately measure the dust concentration, and timely feedback information to the control system for intelligent adjustment.

[0054] As the core control unit of the whole system, the controller is connected to the dust concentration sensor 7 on the one hand to receive the dust concentration data collected by it; on the other hand, the controller also establishes a communication and control link with the induced draft fan 6. When the dust concentration sensor 7 detects that the dust concentration is too high, the controller will automatically adjust the working parameters of the induced draft fan 6, such as wind speed, air volume, etc., according to the preset logic program or algorithm to enhance the dust removal effect and ensure that the dust concentration in the silo is maintained within a safe and controllable range.

[0055] In this way, the conveying and dust removal system of the utility model can not only effectively separate biomass particles and dust, but also realize automatic control of the dust removal process, which not only improves work efficiency but also ensures the safety of the working environment, and effectively promotes the clean and green process of the biomass energy industry.

[0056] In an optional solution, the dust concentration sensor 7 can be set at the top of the graded flow bin 2. Such a layout design takes into account the characteristics of dust in the air flow in the silo. Usually, due to gravity and air disturbance during the transportation process, part of the dust will rise with the air flow and concentrate near the top of the silo. Placing the dust concentration sensor 7 at the top position can more accurately capture the peak value of the overall dust concentration in the silo, thereby achieving real-time monitoring and effective control.

[0057] When the sensor detects that the dust concentration at the top exceeds the preset threshold, it will immediately trigger the controller to adjust the operating status of the induced draft fan 6, increase the exhaust volume, accelerate the dust discharge, and ensure that the dust concentration in the silo is always kept within a safe range. This is not only beneficial for protecting on-site workers from dust, but also can effectively prevent safety hazards that may be caused by excessive dust concentration, such as serious accidents such as dust explosions, and ensure the stable and efficient operation of the biomass conveying and dust removal system.

[0058] In certain specific embodiments of the present invention, the dust removal equipment 9 used can flexibly select a bag dust collector or a cyclone separator according to actual needs and application scenarios, or use a combination of a cyclone separator and a bag dust collector at the same time.

[0059] The bag filter uses a filter bag made of fiber fabric to capture and filter dust particles. When the dust-laden airflow passes through the filter bag, the dust is trapped on the surface of the filter bag, and the clean air is discharged through the filter bag. This dust removal equipment has the characteristics of high efficiency, stability, and wide application range, and is particularly suitable for handling dust with small particle size and low concentration.

[0060] The cyclone separator uses the principle of centrifugal force to separate the dust-laden airflow due to the density difference between dust particles and gas during high-speed rotation. Dust particles collide with and adhere to the wall of the separator under the action of centrifugal force, and then slide into the dust hopper under the action of gravity, while the purified gas is discharged from the exhaust port at the top of the separator. The cyclone separator has a compact structure, is easy to maintain, and has relatively low operating costs. It is particularly suitable for handling dust with larger particle size and higher concentration.

[0061] These two types of dust removal equipment 9 can be reasonably matched or used alone according to the specific working conditions and dust removal efficiency requirements of the conveying dust removal system to achieve efficient dust removal during biomass transportation and ensure the safety and cleanliness of the working environment.

[0062] In some embodiments of the utility model, the conveying and dust removal system also includes a dust cover 4, which is arranged at the bottom of the graded flow bin 2 and is located at the position where the graded flow bin 2 and the output conveyor 5 are connected. The purpose of designing the dust cover 4 is to effectively prevent the uncaptured fine dust from escaping into the surrounding environment when the biomass particles complete dust separation and are transferred from the graded flow bin 2 to the output conveyor 5. By arranging the dust cover 4 at the interface, the airtightness and dust removal effect of the system can be further enhanced to ensure that even trace dust that may appear during the falling and transmission of biomass particles can be effectively blocked and recovered. In this way, not only the dust pollution in the workplace is significantly reduced, the safety of the working environment and the health protection of employees are improved, but also it helps to maintain the overall cleanliness and energy-saving and consumption-reducing effects of the biomass fuel transportation process.

[0063] The dust cover 4 can be in various forms in the conveying and dust removal system of the utility model, and its main function is to prevent dust from escaping from the bottom of the graded flow bin 2 and ensure that as much dust as possible is collected and processed during the conveying process. The specific forms of the dust cover 4 may include but are not limited to:

[0064] 1. Sealed soft curtain cover: Made of flexible material, it can be closely attached to the connection between the grading flow bin 2 and the output conveyor 5 to form a sealed barrier to prevent dust leakage.

[0065] 2. Fixed hard shell dust cover 4: constructed of metal or non-metal material to form a solid box structure, covering the bottom outlet of the grading flow bin 2 and the output conveying device 5 connected thereto, preventing dust from escaping through good sealing performance.

[0066] 3. Retractable and elastic dustproof structure: It can be freely retracted according to the working state of the output conveying device 5 to ensure good sealing in both static and dynamic transmission stages.

[0067] 4. Interlayer negative pressure dust suction port: A negative pressure dust suction device is arranged inside the dust cover 4, and the induced draft fan 6 is used to suck the dust that may escape into the dust removal system through the special air duct 8 to ensure that the dust is collected without omission.

[0068] The selection of the dust cover 4 needs to be combined with the actual working conditions, and not only its dustproof effect but also its compatibility with other system components and the convenience of operation and maintenance should be considered.

[0069] In some embodiments of the present invention, the diameter of the through hole 101 is less than 6 mm.

[0070] Since the standard diameter range of biomass particles is usually 6 mm-10 mm, the advantage of such a design is that the biomass particles cannot pass through the through hole 101 due to their size being larger than the diameter of the through hole 101 , and can only slide smoothly along the sieve plate 10 .

[0071] In contrast, the dust particles mixed in the biomass particles are usually much smaller than 6 mm, which allows the dust to pass through these small-diameter through holes 101 smoothly under the action of gravity, settle downward in the vertical direction, and achieve graded flow with the biomass particles in a physical sense.

[0072] Such a design can not only effectively reduce the flying of dust during the transportation process, ensuring the cleanliness of the operating environment, but also improve the efficiency of separation of biomass particles and dust, which is beneficial to subsequent dust removal treatment and efficient utilization of biomass fuel.

[0073] The input conveyor 1 and the output conveyor 5 in the embodiment of the utility model can be common solid material conveying equipment such as belt conveyors or chain conveyors. For example, both the input conveyor 1 and the output conveyor 5 are belt conveyors, including conveyor belts and conveyor rollers connected to the conveyor belts. This equipment is very suitable for the transportation of biomass particles due to its simple structure, easy maintenance, stable transportation, and ability to adapt to changes in the shape and size of biomass particles to a certain extent. At the same time, through the reasonable layout and design of the input conveyor 1 and the output conveyor 5, the connection and smooth operation of biomass fuel in the entire transportation and dust removal process can be achieved.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A conveying and dust removal system, characterized in that: include: Input conveyor; An output conveying device is disposed below the input conveying device and is spaced apart from the input conveying device; A grading flow bin is covered at the end of the input conveying device and the outside of the front end of the output conveying device. A diversion structure is arranged at a position between the input conveying device and the output conveying device in the grading flow bin. The diversion structure includes at least one sieve plate, which is arranged obliquely and has through holes.

2. The conveying and dust removal system according to claim 1, characterized in that: The flow distribution structure includes a first flow distribution plate group, and the first flow distribution plate group includes a pair of the sieve plates. The tops of the pair of sieve plates in the first flow distribution plate group are connected and gradually tilted away from each other from top to bottom.

3. The conveying and dust removal system according to claim 2, characterized in that: The diverter structure further includes a second diverter plate group, which includes a pair of sieve plates. The pair of sieve plates of the second diverter plate group are gradually inclined toward each other from top to bottom, and a gap is formed at the bottom.

4. The conveying and dust removal system according to claim 3, characterized in that: At least one of the first diverter plate group and the second diverter plate group is provided in plurality, and the first diverter plate group and the second diverter plate group are alternately arranged from top to bottom.

5. The conveying and dust removal system according to claim 1, characterized in that: Also includes: Dust removal equipment; An air duct, one end of which is connected to the inlet of the dust removal device, and the other end of which is connected to the inner cavity of the graded flow bin; The induced draft fan is arranged on the air duct.

6. The conveying and dust removal system according to claim 5, characterized in that: Also includes: A dust concentration sensor is arranged on the inner wall of the grading flow bin; A controller is connected to the dust concentration sensor and the induced draft fan respectively, and the controller is configured to control the operation of the induced draft fan based on a detection signal of the dust concentration sensor.

7. The conveying and dust removal system according to claim 6, characterized in that: The dust concentration sensor is located on the top of the graded flow bin.

8. The conveying and dust removal system according to any one of claims 5 to 7, characterized in that: The dust removal equipment is a bag dust collector and a cyclone separator, or a combination of the two.

9. The conveying and dust removal system according to claim 1, characterized in that: It also includes a dust cover, which is arranged at the bottom of the grading flow bin and is located at the position where the grading flow bin and the output conveying device are connected.

10. The conveying and dust removal system according to claim 1, characterized in that: The diameter of the through hole is less than 6 mm.

Images