Mesh belt drying machine with ash removal device

Abstract

The utility model relates to the field of sludge drying equipment, in particular to a mesh belt drying machine with an ash removal device, which comprises a machine shell, a mesh chain conveying assembly, a centrifugal fan, a heat exchanger and the ash removal device, efficient cleaning and conveying of sludge are achieved through cooperation of the spiral conveying piece, the baffle, the driving piece and the scraping piece. In addition, a vibration assembly, a dust removal device, a rubber connecting plate and other structures are additionally arranged, and the equipment operation efficiency and reliability are further improved. Sludge residues can be efficiently removed to reduce blockage, the drying efficiency can be improved, and environmental pollution can be reduced.

Description

A mesh belt dryer with a dust removal device Technical Field

[0001] This application relates to the field of sludge drying equipment technology, and in particular to a mesh belt dryer with a dust removal device. Background Technology

[0002] Mesh belt dryers, as an important sludge treatment device, play a significant role in environmental protection and resource recycling. With increasingly stringent environmental protection requirements, sludge drying technology has received widespread attention and development. Drying effectively reduces sludge volume, lowers transportation costs, and facilitates subsequent resource utilization. Against this backdrop, mesh belt dryers, with their simple structure, convenient operation, and high processing efficiency, have become one of the mainstream devices in the sludge drying field, widely used in wastewater treatment plants, the chemical industry, and agricultural waste treatment.

[0003] In existing technologies, various design methods are typically employed to achieve efficient sludge drying. For example, multi-layer mesh conveyor components are used to increase the contact area between the sludge and hot air, thereby improving drying efficiency; centrifugal fans and heat exchangers are configured to form a hot air circulation system, ensuring the sludge is fully heated during the drying process; and screw conveyors are commonly used to collect and discharge the dried sludge. However, these conventional methods often overlook the issue of sludge residue during transport, especially since sludge easily adheres to the surfaces of baffles and other components, leading to cleaning difficulties and impacting equipment operating efficiency and maintenance costs.

[0004] While existing technologies can meet the requirements for sludge drying to some extent, they fail to effectively address the problem of sludge residue remaining on the inner walls of equipment during transport. This residue not only reduces drying efficiency but may also cause equipment blockage or corrosion, thereby affecting the equipment's service life and operational stability. Therefore, how to efficiently remove sludge residue has become an urgent technical problem to be solved. Summary of the Invention

[0005] The purpose of this application is to overcome the above-mentioned technical problems and provide a mesh belt dryer with a dust removal device, which adopts the following solution:

[0006] A mesh belt dryer with a dust removal device includes: a casing; a mesh belt conveyor assembly located on one side inside the casing; a centrifugal fan disposed inside the casing and located on one side of the mesh belt conveyor assembly, one end of the centrifugal fan being an air outlet; a heat exchanger disposed inside the casing and located at the end of the centrifugal fan away from the air outlet, for heating the air inside the casing so that the centrifugal fan can blow hot air out of the air outlet; and a dust removal device disposed inside the casing and located at the lower end of the mesh belt conveyor assembly, and opposite to the casing. The air outlet is configured such that the dust removal device includes a sludge conveying assembly and a scraping assembly. The sludge conveying assembly includes a spiral conveyor and baffles. The baffles are located at both ends of the spiral conveyor and are V-shaped relative to the mesh chain conveyor assembly to receive the sludge conveyed by the mesh chain conveyor assembly. The scraping assembly includes a first driving component and a scraping component. The first driving component is located on the baffle, and the scraping component is sleeved on the first driving component to scrape the sludge on the surface of the baffle into the spiral conveyor for conveying as the first driving component drives it.

[0007] By adopting the above technical solutions, the mesh belt dryer achieves efficient drying and cleaning of sludge. Specifically, the mesh chain conveyor assembly inside the casing can transport sludge in layers, increasing its contact area with hot air and thus improving drying efficiency. A centrifugal fan, in conjunction with a heat exchanger, blows heated air out of the outlet, further promoting the sludge drying process. The sludge conveying assembly in the dust removal device effectively receives and concentrates the sludge falling from the mesh chain conveyor assembly through a spiral conveyor and V-shaped baffles, preventing material scattering. The scraping assembly, driven by a first drive component, moves the scraper to promptly remove residual sludge from the baffle surface, preventing blockage and ensuring continuous and stable equipment operation. The overall solution significantly improves the automation level and cleaning effect of sludge treatment.

[0008] Optionally, the dust removal device further includes: a vibration assembly located at the end of the baffle away from the scraping assembly, and including: a support member, one end of which is disposed on the housing, and a side plate is disposed on the side of the support member; a rotation assembly including a second drive member and a rotating wheel, the second drive member being fixed at the end of the support member away from the housing, and the rotating wheel being connected to the second drive member for rolling against the baffle; and an elastic member, one end of which is fixed on the side plate, and the other end of which is fixed at the end of the baffle away from the first drive member.

[0009] By adopting the above technical solution, the vibration assembly effectively reduces sludge residue on the baffle. Specifically, the support and side plates provide a stable mounting base for the rotating assembly and the elastic element, ensuring reliable operation of the entire vibration assembly. The second drive component in the rotating assembly drives the rotating wheel to roll against the baffle, generating periodic impact forces on the baffle during rotation, causing the sludge on the baffle to loosen. Simultaneously, the elastic element facilitates the reciprocating motion of the baffle following the rotation of the rotating wheel, allowing the sludge on the upper surface of the baffle to slide down onto the screw conveyor for transport during vibration; furthermore, the elastic element absorbs some of the impact force, protecting the baffle from damage. This design significantly improves the working efficiency of the dust removal device, reduces the possibility of sludge residue, and also reduces the frequency of equipment cleaning and maintenance.

[0010] Optionally, it also includes: a dust removal device, fixed inside the housing and located at the end of the mesh conveyor assembly away from the dust removal device, for removing dust from the exhaust air.

[0011] By adopting the above technical solution, the mesh belt dryer with dust removal device is equipped with a dust removal device inside the machine casing, which can effectively remove dust from the exhaust air, reduce pollutant emissions, improve the working environment, and improve the environmental performance of the equipment operation.

[0012] Optionally, the dust removal device further includes: a rubber connecting plate, one end of which is connected to the end of the baffle, and the other end of which is connected to the inner wall of the housing, so as to be located between the baffle and the inner wall of the housing.

[0013] By adopting the above technical solution, the rubber connecting plate can effectively fill the gap between the baffle and the inner wall of the casing, preventing sludge from leaking through the gap and improving the sealing and reliability of the equipment. At the same time, the rubber material has a certain degree of elasticity, which can buffer the displacement of the baffle caused by vibration or other external forces to a certain extent, thereby extending the service life of the baffle.

[0014] Optionally, the mesh conveyor assembly is configured with three staggered layers for sequentially conveying sludge material to the baffle, and then flowing through the baffle into the screw conveyor for conveying.

[0015] By adopting the above technical solution, the staggered three-layer structure of the mesh belt conveyor assembly increases the residence time and path length of the sludge material within the mesh belt dryer, thereby increasing the contact area and time between the sludge material and the hot air, allowing the sludge material to be dried more thoroughly. Simultaneously, this design helps the sludge material to be evenly distributed and fall layer by layer to the baffles, flowing through the baffles into the screw conveyor for subsequent transport, effectively avoiding problems such as material accumulation or uneven drying.

[0016] Optionally, the scraping component includes a belt and a plurality of scrapers, the plurality of scrapers being equally spaced on the belt, the first driving component including a driving roller and a driven roller, the belt being sleeved on the driving roller and the driven roller, wherein the belt is driven by the driving roller to drive the plurality of scrapers to scrape the sludge on the baffle.

[0017] By adopting the above technical solution, the belt and multiple scrapers can effectively cover the baffle surface, achieving comprehensive scraping of sludge and preventing sludge residue. The coordinated use of the drive roller and driven roller allows the belt to run stably and drive the scrapers for continuous operation, improving scraping efficiency. Specifically, the belt, driven by the drive roller, drives multiple scrapers to scrape the sludge on the baffle, thereby ensuring that the sludge is effectively collected into the screw conveyor for subsequent processing.

[0018] Optionally, the rotating wheel is provided with a plurality of protruding strips on its circumference, which are used to abut against the baffle in sequence when the rotating wheel rotates.

[0019] By adopting the above technical solution, multiple protrusions are set on the circumference of the rotating wheel, allowing the rotating wheel to sequentially abut against the baffle during rotation. This design enhances the vibration effect of the rotating wheel on the baffle, thereby effectively preventing sludge from adhering to and accumulating on the baffle surface, and further improving the working efficiency and reliability of the dust removal device.

[0020] Optionally, the protrusion is integrally formed with the rotating wheel, and the protrusion has a half-cylindrical structure on the rotating wheel.

[0021] By adopting the above technical solution, the integrated design of the convex strip and the rotating wheel improves the stability and reliability of the structure, preventing the equipment from being affected by loosening or falling off during use. Furthermore, designing the convex strip as a half-cylinder structure effectively increases the contact area between the convex strip and the baffle, thereby transmitting vibration more evenly when the rotating wheel rolls, further improving the sludge removal effect on the baffle and reducing residue.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By setting up a sludge removal device, including a sludge conveying assembly and a scraping assembly, the sludge remaining on the baffle surface can be effectively removed, avoiding the accumulation of sludge on the inner wall of the equipment, thereby improving drying efficiency and reducing the risk of equipment blockage and corrosion;

[0024] 2. The first drive component and the scraper component in the scraping assembly work together to automatically scrape off the sludge on the surface of the baffle and guide it into the screw conveyor for conveying, thereby realizing the automated cleaning and collection of sludge and reducing manual maintenance costs;

[0025] 3. The centrifugal fan and heat exchanger work together to form a hot air circulation system, ensuring that the sludge on the mesh conveyor components can be fully heated and dried. Combined with the use of the ash removal device, this further improves the overall operating efficiency and stability of the equipment. Attached Figure Description

[0026] Figure 1 is a three-dimensional structural schematic diagram of the mesh belt dryer with a dust removal device disclosed in an embodiment of this application;

[0027] Figure 2 is a schematic diagram of part A of the mesh belt dryer with a dust removal device disclosed in an embodiment of this application;

[0028] Figure 3 is a schematic diagram of the scraper component in the mesh belt dryer with a dust removal device disclosed in the embodiments of this application.

[0029] Figure 4 is a schematic diagram of the state structure of the mesh belt conveyor and the screw conveyor in the mesh belt dryer with a dust removal device disclosed in the embodiments of this application when conveying sludge material.

[0030] Figure 5 is a schematic diagram of a portion of the structure of the vibration component 53 in the mesh belt dryer with a dust removal device disclosed in the embodiments of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Casing; 20. Mesh conveyor assembly; 30. Centrifugal fan; 31. Air outlet; 40. Heat exchanger; 50. Dust removal device; 51. Sludge conveying assembly; 511. Screw conveyor; 512. Baffle; 52. Scraper assembly; 521. First drive component; 5211. Drive roller; 5212. Driven roller; 522. Scraper component; 5221. Belt; 5222. Scraper; 53. Vibration assembly; 531. Support component; 5311. Side plate; 532. Rotating assembly; 5321. Second drive component; 5322. Rotating wheel; 53221. Protruding strip; 533. Elastic component; 54. Rubber connecting plate; 60. Dust removal device. Detailed Implementation

[0033] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to and includes any or all possible combinations of one or more of the listed items.

[0034] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0035] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0036] Referring to Figure 1, a mesh belt dryer with a dust removal device disclosed in an embodiment of this application includes a housing 10, a mesh belt conveyor assembly 20, a centrifugal fan 30, a heat exchanger 40, and a dust removal device 50.

[0037] The housing 10 serves as the outer shell of the entire equipment, housing all internal components. The mesh conveyor assembly 20 is located on one side inside the housing 10, used for conveying sludge material layer by layer, as shown in Figure 4. A centrifugal fan 30 is located inside the housing 10, on one side of the mesh conveyor assembly 20, with one end serving as an air outlet 31 to blow hot air onto the sludge material. A heat exchanger 40 is located inside the housing 10, at the end of the centrifugal fan 30 furthest from the air outlet 31, used to heat the air inside the housing 10 so that the centrifugal fan 30 can blow hot air out of the air outlet 31. A dust removal device 50 is located inside the housing 10, at the lower end of the mesh conveyor assembly 20, and opposite the air outlet 31, used to scrape off residual sludge.

[0038] Specifically, referring to Figures 1 and 2, the sludge removal device 50 includes a sludge conveying assembly 51 and a scraping assembly 52. ​​The sludge conveying assembly 51 includes a screw conveyor 511 and baffles 512. The baffles 512 are located at both ends of the screw conveyor 511 and are arranged in a V-shape relative to the mesh conveyor assembly 20, forming a symmetrical structure, and are used to receive the sludge conveyed by the mesh conveyor assembly 20. The screw conveyor 511 is located in the middle of the symmetrically arranged baffles 512. The screw conveyor 511 has helical blades inside, and the sludge is conveyed by rotation. The baffles 512 can be made of high-strength plastic or metal materials and have a polished surface to reduce sludge adhesion. In addition, the V-shaped structure design of the baffles 512 can effectively guide the sludge flow to the screw conveyor 511, improving collection efficiency.

[0039] Referring to Figures 2 and 3, the scraping assembly 52 includes a first driving member 521 and a scraping member 522. The first driving member 521 is located on the baffle 512 and is used to provide power. Specifically, it may include a driving roller 5211 and a driven roller 5212. The scraping member 522 includes a belt 5221 and multiple scrapers 5222. The belt 5221 is sleeved on the driving roller 5211 and the driven roller 5212. The multiple scrapers 5222 are equally spaced on the belt 5221. When the driving roller 5211 rotates, the belt 5221 drives the driven roller 5212 to rotate, which in turn drives the multiple scrapers 5222 to scrape the sludge on the baffle 512. At the same time, the V-shaped structure design of the baffle 512 can effectively guide the sludge to the screw conveyor 511, thereby avoiding the accumulation of sludge on the baffle 512 and further improving the sludge collection efficiency.

[0040] It is worth mentioning that the scraper 5222 is made of rubber, which has a certain degree of elasticity and can closely fit the surface of the baffle 512 to ensure the scraping effect. In addition, the edge of the scraper 5222 is designed with a curved structure, which can reduce wear on the surface of the baffle 512 during the scraping process.

[0041] Furthermore, referring to Figure 4, the mesh conveyor assembly 20 is configured with three staggered layers. This increases the residence time and path length of the sludge material within the mesh belt dryer while conveying it to the baffle 512 and the screw conveyor 511. This increases the contact area and time between the sludge material and the hot air, allowing for more thorough drying. In this embodiment, each layer of the mesh conveyor assembly 20 can consist of several chains connected to each other via connecting rods, forming a mesh structure. The chains can be made of high-temperature and corrosion-resistant stainless steel to ensure normal operation even in high-temperature environments. The length of the connecting rods can be adjusted according to actual needs to change the spacing of the mesh conveyor assembly 20 and meet the conveying requirements of different sludge materials. It should be noted that the structure of the mesh conveyor assembly 20 is not limited in this embodiment; it only needs to achieve the sludge conveying function.

[0042] Furthermore, in order to more effectively reduce the sludge residue on the baffle 512, referring to Figures 1 and 2, in this embodiment, the dust removal device 50 also includes a vibration component 53 located at the end of the baffle 512 away from the scraping component 52.

[0043] Referring to Figures 2 and 5, the vibration assembly 53 includes a support member 531, a rotating assembly 532, and an elastic member 533. One end of the support member 531 is mounted on the housing 10, and the other end supports the rotating assembly 532. A side plate 5311 is welded to the side of the support member 531 to fix one end of the elastic member 533. Of course, the side plate 5311 and the support member 531 can be integrally connected to improve structural robustness.

[0044] Referring to Figure 5, the rotating assembly 532 includes a second driving member 5321 and a rotating wheel 5322. The second driving member 5321 is fixed to the end of the support member 531 away from the housing 10 and is used to drive the rotating wheel 5322 to rotate. The rotating wheel 5322 is connected to both ends of the second driving member 5321 and is used to roll against the baffle 512. Multiple protrusions 53221 are provided on the outer circumferential surface of the rotating wheel 5322. The protrusions 53221 have a half-cylindrical structure on the rotating wheel 5322 and are integrally formed with the rotating wheel 5322. These protrusions sequentially abut against the baffle 512 when the rotating wheel 5322 rotates, generating a periodic impact force on the baffle 512 during rotation, causing the baffle 512 to vibrate and loosening the sludge on the baffle 512.

[0045] The elastic element 533 is a spring, with one end fixed to the side plate 5311 and the other end fixed to the lower surface of the baffle 512 away from the first driving member 521. In this embodiment, the elastic element 533 facilitates the reciprocating motion of the baffle 512 following the rotation of the rotating wheel 5322, thereby allowing the sludge on the upper surface of the baffle 512 to slide down onto the screw conveyor 511 for conveying when the baffle 512 vibrates. Furthermore, the presence of the elastic element 533 absorbs some of the impact force, protecting the baffle 512 from damage. This combination of vibration and scraping can more thoroughly remove sludge residue, improving the efficiency and reliability of the equipment.

[0046] Furthermore, referring to Figure 1, this embodiment also includes a dust removal device 60, which is fixed inside the housing 10 and located at the end of the mesh conveyor assembly 20 away from the dust removal device 50, for removing dust from the exhaust air.

[0047] The dust collector 60 has its inlet connected to the outlet of the mesh conveyor assembly 20 to receive dust-laden air discharged from the assembly. The outlet 31 of the dust collector 60 is connected to the outside environment to discharge purified air. To improve dust removal efficiency, a multi-stage filtration unit can be installed inside the dust collector 60 to filter dust particles of different sizes at each stage. Additionally, a dust hopper can be installed at the bottom of the dust collector 60 to collect the filtered dust for subsequent processing. Of course, the structure of the dust collector 60 is not limited here; any device that achieves the same function is acceptable.

[0048] Furthermore, in order to prevent sludge from leaking from the gap between the baffle 512 and the inner wall of the housing 10, referring to Figures 1 and 2, in this embodiment, the sludge removal device 50 also includes a rubber connecting plate 54, one end of which is connected to the end of the baffle 512 and the other end of which is connected to the inner wall of the housing 10, so as to be located between the gap between the baffle 512 and the inner wall of the housing 10.

[0049] The rubber connecting plate 54 serves to seal the gap between the baffle 512 and the inner wall of the casing 10, preventing sludge leakage. Simultaneously, the rubber connecting plate 54, made of rubber, possesses a degree of elasticity, which can buffer the displacement of the baffle 512 caused by vibration or other external forces, thereby extending the service life of the baffle 512. Furthermore, the design of the rubber connecting plate 54 not only prevents sludge leakage but also reduces hot air loss, improving thermal energy utilization. This design not only improves the operating efficiency of the equipment but also reduces energy consumption, providing a more economical and reliable solution for sludge drying.

[0050] In summary, the mesh belt dryer with a dust removal device disclosed in this application embodiment can efficiently receive and transport sludge falling from the mesh belt conveyor assembly 20 through the cooperation of the spiral conveyor 511 and the V-shaped baffle 512, preventing sludge residue from remaining on the inner wall of the equipment, thereby improving drying efficiency and reducing the risk of equipment corrosion. The scraping assembly 52 drives the scraper 522 to move with the help of the first driving component 521, achieving precise scraping of sludge from the surface of the baffle 512, ensuring that the sludge smoothly enters the spiral conveyor 511, and improving the automation level of sludge cleaning. The centrifugal fan 30 and the heat exchanger 40 work together to form a stable hot air supply system. Combined with the multi-layer design of the mesh belt conveyor assembly 20, the contact area between the sludge and the hot air is effectively increased, significantly improving the uniformity and efficiency of sludge drying.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A mesh belt dryer with a dust removal device, characterized in that, include: A housing (10); a mesh conveyor assembly (20), located on one side inside the housing (10); a centrifugal fan (30), disposed inside the housing (10) and located on one side of the mesh conveyor assembly (20), one end of the centrifugal fan (30) being an air outlet (31); a heat exchanger (40), disposed inside the housing (10) and located at the end of the centrifugal fan (30) away from the air outlet (31), used to heat the air inside the housing (10) so that the centrifugal fan (30) can blow hot air out of the air outlet (31); a dust removal device (50), disposed inside the housing (10) and located at the lower end of the mesh conveyor assembly (20), and positioned relative to the air outlet (31), the dust removal device (50) including The sludge conveying assembly (51) and the scraping assembly (52) are provided. The sludge conveying assembly (51) includes a screw conveyor (511) and a baffle (512). The baffle (512) is disposed at both ends of the screw conveyor (511) and is V-shaped relative to the mesh chain conveying assembly (20) to receive the sludge conveyed by the mesh chain conveying assembly (20). The scraping assembly (52) includes a first drive member (521) and a scraper (522). The first drive member (521) is located on the baffle (512), and the scraper (522) is sleeved on the first drive member (521) to scrape the sludge on the surface of the baffle (512) into the screw conveyor (511) for conveying as the first drive member (521) drives.

2. The mesh belt dryer with a dust removal device according to claim 1, characterized in that, The dust removal device (50) further includes: a vibration assembly (53), located at one end of the baffle (512) away from the scraping assembly (52), and includes: a support member (531), one end of which is disposed on the housing (10), and a side plate (5311) is disposed on the side of the support member (531); a rotating assembly (532), including a second driving member (5321) and a rotating wheel (5322), the second driving member (5321) being fixed at one end of the support member (531) away from the housing (10), and the rotating wheel (5322) being connected to the second driving member (5321) for rolling abutting against the baffle (512); and an elastic member (533), one end of which is fixed on the side plate (5311), and the other end of which is fixed at one end of the baffle (512) away from the first driving member (521).

3. The mesh belt dryer with a dust removal device according to claim 1, characterized in that, Also includes: A dust removal device (60) is fixed inside the housing (10) and located at the end of the mesh conveyor assembly (20) away from the dust removal device (50), and is used to remove dust from the exhaust air.

4. The mesh belt dryer with a dust removal device according to claim 1, characterized in that, The dust removal device (50) further includes a rubber connecting plate (54), one end of which is connected to the end of the baffle (512) and the other end of which is connected to the inner wall of the housing (10), so as to be located between the baffle (512) and the inner wall of the housing (10).

5. The mesh belt dryer with a dust removal device according to claim 1, characterized in that, The mesh conveyor assembly (20) is configured with three staggered layers for sequentially conveying sludge material to the baffle (512) and then flowing into the spiral conveyor (511) through the baffle (512) for conveying.

6. The mesh belt dryer with a dust removal device according to claim 1, characterized in that, The scraping component (522) includes a belt (5221) and a plurality of scrapers (5222). The plurality of scrapers (5222) are equally spaced on the belt (5221). The first driving component (521) includes a driving roller (5211) and a driven roller (5212). The belt (5221) is sleeved on the driving roller (5211) and the driven roller (5212). The belt (5221) is driven by the driving roller (5211) to drive the plurality of scrapers (5222) to scrape the sludge on the baffle (512).

7. The mesh belt dryer with a dust removal device according to claim 2, characterized in that, The rotating wheel (5322) has a plurality of protrusions (53221) on its periphery, which are used to abut against the baffle (512) in sequence when the rotating wheel (5322) rotates.

8. The mesh belt dryer with a dust removal device according to claim 7, characterized in that, The protruding strip (53221) is integrally formed with the rotating wheel (5322), and the protruding strip (53221) has a half-cylindrical structure on the rotating wheel (5322).

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