Dust ash cold briquetting mixing equipment and mixing system
Patent Information
- Application Number
- CN202522108612.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-09-30
AI Technical Summary
[0004]本实用新型的目的在于提供一种除尘灰冷压块混料设备及混料系统，旨在解决混料均匀性差、影响冷压块强度和成分稳定性的问题
[0013]本实用新型提供的除尘灰冷压块混料设备的有益效果在于：与现有技术相比，本实用新型除尘灰冷压块混料设备通过设置螺距逐渐减小的螺旋叶片，能够使物料在混料机内经历不同程度的搅拌和挤压，从进料到出料的过程中，物料不断地被搅拌、破碎和分散，从而提高了混合的均匀性，确保粘结剂能够均匀地分布在除尘灰中，有利于提高冷压块的强度和成分稳定性；破碎件的设置有效地解决了普通双轴混料机在搅拌时存在的物料分层和团聚残留的问题；破碎件能够将团聚的物料破碎，使不同密度的材料充分混合，避免了因物料分层导致的粘结剂分布不均的情况。
Smart Images
Figure CN224793369U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of solid waste recycling technology, and more specifically, it relates to a dust removal ash cold pressing briquetting mixing equipment and mixing system. Background Technology
[0002] Dust collector ash is a powdery solid waste collected by dust collection systems during the production processes of industries such as steel, coking, and power. Its composition is complex and contains a certain amount of valuable elements such as iron and carbon. Directly dumping or landfilling dust collector ash not only occupies land resources but also risks causing air pollution due to dust dispersion and the leaching of heavy metals into the soil and groundwater. In recent years, with the increasing national requirements for the resource utilization of solid waste, cold-pressing dust collector ash has become the mainstream treatment method. This involves mixing dust collector ash with binders and other materials in a specific ratio, then cold-pressing it into block-shaped materials for reuse in blast furnaces, converters, and other production processes, thus achieving the recycling of valuable elements.
[0003] As the core upstream equipment in the production of cold-pressed briquettes from dust collectors, the mixing equipment's mixing effect directly determines the strength, compositional uniformity, and recyclability of the cold-pressed briquettes. Currently, biaxial mixers are commonly used in dust collector briquette production lines. However, because the production of cold-pressed briquettes requires the uniform mixing of dust collector ash with binders and other materials, and different materials have different densities, ordinary biaxial mixers can cause material stratification and agglomeration residues during mixing. This results in uneven distribution of the binder, affecting the strength and compositional stability of the cold-pressed briquettes. Utility Model Content
[0004] The purpose of this utility model is to provide a dust removal ash cold briquette mixing equipment and mixing system, which aims to solve the problems of poor mixing uniformity, affecting the strength and composition stability of cold briquettes.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a dust removal ash cold-pressed briquette mixing device, comprising: The mixing machine housing has a feed inlet at its upper end and a discharge outlet at its lower end, with the feed inlet and discharge outlet located at opposite ends of the length of the mixing machine housing. Two stirring shafts are symmetrically arranged in the inner cavity of the mixer housing, and a drive mechanism is connected to the end of each stirring shaft; A spiral blade is arranged around the outside of the stirring shaft. The spiral blade includes a feed section blade, a mixing section blade, and a discharge section blade connected in sequence. The pitch of the feed section blade, the mixing section blade, and the discharge section blade gradually decreases. The crushing component is located on the outside of the stirring shaft, extending radially outward along the stirring shaft and situated within the gap between adjacent layers of the mixing section blades.
[0006] In another embodiment of this application, the helical blades on the two stirring shafts are staggered and overlapping in axial projection, and the width of the overlap is greater than one-third of the width of the helical blades.
[0007] In another embodiment of this application, the surfaces of the feed section blades and the mixing section blades are provided with grinding teeth, the grinding teeth are spaced apart, and the grinding teeth protrude from the surface of the spiral blades.
[0008] In another embodiment of this application, the end of the grinding tooth is arc-shaped.
[0009] In another embodiment of this application, the crushing component is a grid blade, and the grid blade is parallel to the mixing section blade.
[0010] In another embodiment of this application, the mesh of the mesh blade is a diamond-shaped hole.
[0011] In another embodiment of this application, the gap between two adjacent layers of the mixing section blades is divided into a first channel and a second channel by the grid blades. The first channel is located on the side of the grid blades closer to the feed inlet. The width of the first channel is smaller than the width of the second channel.
[0012] In another embodiment of this application, an anti-stick liner is provided in the inner cavity of the mixer housing, and a scraper is provided on the edge of the spiral blade, the scraper being attached to the surface of the anti-stick liner.
[0013] The beneficial effects of the dust collector cold briquette mixing equipment provided by this utility model are as follows: Compared with the prior art, the dust collector cold briquette mixing equipment of this utility model, by setting spiral blades with gradually decreasing pitch, enables the material to undergo different degrees of stirring and extrusion in the mixer. From feeding to discharging, the material is continuously stirred, crushed and dispersed, thereby improving the uniformity of mixing and ensuring that the binder can be evenly distributed in the dust collector ash, which is beneficial to improving the strength and composition stability of the cold briquette. The setting of the crushing component effectively solves the problem of material stratification and agglomeration residue in ordinary twin-shaft mixers during stirring. The crushing component can break up agglomerated materials, so that materials of different densities are fully mixed, avoiding the uneven distribution of binder caused by material stratification.
[0014] A dust collector cold briquette mixing system is also provided, characterized in that the above-mentioned dust collector cold briquette mixing equipment is used.
[0015] The beneficial effects of the dust removal ash cold briquette mixing system provided by this utility model are as follows: Compared with the prior art, the dust removal ash cold briquette mixing system of this utility model adopts the above-mentioned dust removal ash cold briquette mixing equipment and has all the beneficial effects it possesses. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 A schematic diagram of the structure of the dust removal ash cold press briquetting system provided in this embodiment of the utility model; Figure 2 A side view of the dust removal ash cold press briquetting mixing equipment provided in an embodiment of this utility model; Figure 3 This is a cross-sectional view of the dust removal ash cold press briquetting mixing equipment provided in the first embodiment of this utility model; Figure 4 This is a cross-sectional view of the dust removal ash cold pressing briquetting mixing equipment provided in the second embodiment of this utility model.
[0018] In the diagram: 1. Tar bin; 2. Water metering scale; 3. Raw material metering device; 4. Mixer housing; 5. Drive motor; 6. Feed pipe; 7. Guide section; 8. Discharge section; 9. Ear plate; 10. Stirring shaft; 11. Feed section blades; 12. Mixing section blades; 13. Discharge section blades; 14. Grid blades; 15. Grinding teeth. Detailed Implementation
[0019] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0020] Please see Figures 1 to 4 The present invention provides a dust collector ash cold press briquetting mixing device and mixing system. The dust collector ash cold press briquetting mixing device includes a mixing machine housing 4, two stirring shafts 10, spiral blades, and a crushing component. The mixing machine housing 4 has an inlet at its upper end and an outlet at its lower end, located at opposite ends of the mixing machine housing 4 along its length. The two stirring shafts 10 are symmetrically arranged within the inner cavity of the mixing machine housing 4, and a drive mechanism is connected to the end of each stirring shaft 10. Spiral blades are arranged around the outside of the stirring shafts 10, and each spiral blade includes a feeding section blade 11, a mixing section blade 12, and an outlet section blade 13 connected sequentially. The pitch of the feeding section blade 11, the mixing section blade 12, and the outlet section blade 13 gradually decreases. The crushing component is located outside the stirring shafts 10, extending radially outward along the stirring shafts 10 and positioned within the gap between adjacent mixing section blades 12.
[0021] The dust removal ash cold-pressed briquette mixing equipment provided by this utility model divides the inner cavity of the mixing machine housing 4 into three areas: a feeding area, a mixing area, and a discharging area, which are distributed sequentially along the feeding to discharging direction. Correspondingly, two stirring shafts 10 are arranged side by side and symmetrically in the inner cavity of the mixing machine housing 4, and the spiral blades of the two stirring shafts 10 are staggered, so that the material is continuously mixed during the backward conveying process. A drive mechanism, such as a drive motor 5, is provided on one side of the mixing machine housing 4; the drive mechanism is connected to the stirring shafts 10 to drive the stirring shafts 10 to rotate.
[0022] The spiral blades on the stirring shaft 10 are divided into three parts: the first part is the feed section blade 11, the second part is the mixing section blade 12, and the third part is the discharge section blade 13. The pitch of the feed section blade 11, the mixing section blade 12, and the discharge section blade 13 decreases sequentially. For example, the pitch of the feed section blade 11 is 120%-130% of the pitch of the mixing section blade 12, and the pitch of the discharge section blade 13 is 70%-80% of the pitch of the mixing section blade 12. The pitch of the mixing section blade 12 is 200 mm.
[0023] The crushing component is a rod-shaped or plate-shaped structure extending radially along the stirring shaft 10. During rotation, it disperses and crushes the material by contacting and squeezing it.
[0024] During the feeding stage, dust and adhesive materials enter the mixer through the feed port at the top of the mixer housing 4. Due to the large pitch of the feed section blades 11, when the drive mechanism drives the stirring shaft 10 to rotate, the feed section blades 11 can convey the material to the mixing section at a relatively fast speed, thus achieving rapid feeding of the material.
[0025] During the mixing stage, the pitch of the mixing section blades 12 is reduced compared to the feed section blades 11. The rotation of the stirring shaft 10 allows the material to be more thoroughly mixed and compressed within the mixing section. The crushing components located in the gaps between adjacent mixing section blades 12 crush and disperse the material. Extending radially outward along the stirring shaft 10, the crushing components effectively break up material agglomerates, ensuring thorough mixing of dust and binders of varying densities and preventing material stratification.
[0026] During the discharge stage, the material, after being thoroughly mixed in the mixing section, is conveyed to the discharge section as the stirring shaft 10 continues to rotate. The discharge section blades 13 have the smallest pitch, and their function is to further compact the material and extrude it from the discharge port at the lower end of the mixer housing 4, forming a mixture with a certain density and uniformity for use in subsequent cold pressing molding processes.
[0027] The dust collector cold-pressed briquette mixing equipment provided by this utility model, compared with the prior art, enables the material to undergo different degrees of stirring and extrusion within the mixer by setting spiral blades with gradually decreasing pitch. From feeding to discharging, the material is continuously stirred, crushed, and dispersed, thereby improving the uniformity of mixing and ensuring that the binder can be evenly distributed in the dust collector ash, which is beneficial to improving the strength and compositional stability of the cold-pressed briquettes. The setting of the crushing component effectively solves the problems of material stratification and agglomeration residue that exist in ordinary twin-shaft mixers during stirring. The crushing component can break up agglomerated materials, so that materials of different densities are fully mixed, avoiding uneven distribution of binder caused by material stratification.
[0028] Optionally, a feed pipe 6 is provided at the feed inlet of the mixer housing 4, and a discharge pipe is provided at the discharge outlet. The discharge pipe includes a guide section 7 and a discharge section 8. The flow area of the guide section 7 gradually decreases from top to bottom, forming a trumpet-shaped structure. The discharge section 8 can be a rectangular tube.
[0029] Multiple sets of ear plates 9 are symmetrically arranged on the side wall of the mixing machine housing 4, and the ear plates 9 are provided with lifting holes.
[0030] In some possible embodiments, please refer to Figure 3 and Figure 4 The spiral blades on the two stirring shafts 10 are staggered and overlapping in the axial projection, and the width of the overlap is greater than one-third of the width of the spiral blades.
[0031] With the mixing machine housing 4 as the reference, the two stirring shafts 10 are symmetrically and parallelly distributed, and their spiral blades form an intersecting coverage area on the projection surface along the length of the housing.
[0032] Ordinary twin-shaft mixers always have mixing blind spots due to insufficient or no blade overlap, resulting in low mixing uniformity. However, when the overlap width is greater than one-third of the blade width, the blind spots are completely covered, and the material is fully mixed and crushed in every area of the shell, improving the uniformity of material mixing. This provides a key guarantee for the strength and compositional stability of cold-pressed blocks, and avoids problems such as cracking and powdering of cold-pressed blocks caused by uneven mixing.
[0033] In some possible embodiments, please refer to Figures 3 to 4 The surfaces of the feed section blade 11 and the mixing section blade 12 are provided with grinding teeth 15, which are spaced apart and protrude from the surface of the spiral blade.
[0034] Dust collector ash is prone to forming hard agglomerates of 5-15mm due to fluctuations in moisture content during storage. If such agglomerates directly enter the mixing section, they will block the blade gaps and reduce conveying efficiency; the crushed parts need to be repeatedly processed, increasing energy consumption; and the inner side of the agglomerates is difficult to contact the binder, resulting in uneven filling.
[0035] Grinding teeth 15 are provided on the surfaces of the blades 11 in the feeding section and the blades 12 in the mixing section. The grinding teeth 15 can achieve a pretreatment effect in the feeding zone. That is, when hard agglomerates move to the surface of the blades 11 in the feeding section with the material, the grinding teeth 15 protruding from the blades will squeeze and destroy the surface of the agglomerates, destroying their structural integrity. As the stirring shaft 10 rotates, a shear gap is formed between adjacent grinding teeth 15. The agglomerates are sheared in the gap, and at the same time, the protruding structure of the grinding teeth 15 will turn the material over, preventing the agglomerates from accumulating on the blade surface.
[0036] In the mixing zone, the grinding teeth 15 on the surface of the mixing section blades 12 perform secondary grinding on the material as the blades rotate, breaking up small agglomerates. The friction between the grinding teeth 15 and the material further removes fine dust adhering to the particle surface, creating conditions for the binder to coat the particles. Unlike the simple helical propulsion of the blades, the raised structure of the grinding teeth 15 causes the material to tumble and collide, forcing the binder to disperse into tiny droplets that evenly coat the surface of each dust particle, rather than concentrating it in the gaps between the particles.
[0037] The grinding teeth 15 enhance the breaking effect on hard agglomerates and eliminate local component inhomogeneity caused by agglomerates.
[0038] Optionally, the ends of the grinding teeth 15 are arc-shaped. The arc-shaped ends make surface contact with fine particles, which can only remove dust from the surface of the particles without further crushing them, thus avoiding excessive crushing. In addition, the arc-shaped ends reduce material adhesion.
[0039] Optionally, grinding teeth 15 are also evenly distributed on the blades 13 in the discharge section. For example... Figure 4 As shown.
[0040] In some possible embodiments, please refer to Figures 3 to 4 The crushing component consists of mesh blades 14, which are parallel to the mixing section blades 12. The mesh blades 14 have a spiral blade structure and are made of wire mesh, comprising an inner ring, an outer ring, and a wire mesh frame. The inner side of the wire mesh frame is welded and fixed to the inner ring, and the outer side is welded and fixed to the outer ring. The mesh openings of the mesh blades 14 are diamond-shaped, meaning the wire mesh frame forms diamond-shaped openings. These diamond-shaped openings typically employ an equilateral diamond design, with side lengths mostly between 8-15 mm and interior angles between 60° and 120°. Because the long side of the diamond-shaped openings is parallel to the spiral direction of the mixing section blades 12, when the material moves along the spiral trajectory, it will preferentially contact the acute angle end of the diamond-shaped openings, achieving directional shearing. This results in more uniform particle size after crushing and reduces the risk of material retention and clogging.
[0041] When the dust collector cold-pressed briquette mixing equipment is running, the two stirring shafts 10 rotate under the drive mechanism, and the grid blades 14 installed on the outside of the stirring shafts 10 also rotate accordingly. The grid blades 14 are located in the gap between the blades 12 of the two adjacent mixing sections. As the stirring shafts 10 rotate, the grid blades 14 crush and disperse the material passing through this area. Since the grid blades 14 are parallel to the mixing section blades 12, during the rotation of the stirring shafts 10, the grid blades 14 can work synergistically with the mixing section blades 12 to more thoroughly stir and mix the material, resulting in a more uniform mixing effect within the mixing section.
[0042] The presence of the grid blades 14 effectively breaks down agglomerates in the material, dispersing them into smaller particles and thus improving the material's dispersibility. This helps solve the problem of material agglomeration residue that exists during mixing in ordinary twin-shaft mixers, allowing the binder to be distributed more evenly in the material, thereby improving the strength and compositional stability of the cold-pressed blocks.
[0043] The grid blades 14, which are parallel to the mixing section blades 12, can disrupt the movement path of the materials during the mixing process, increase the friction between the materials, and improve the uniformity of mixing.
[0044] In addition, the gap between the two adjacent mixing section blades 12 is divided into a first channel and a second channel by the grid blades 14. The first channel is located on the side of the grid blades 14 near the feed inlet; the width of the first channel is smaller than the width of the second channel.
[0045] The grid blade 14 is located near the mixing section blade 12 on the inlet side. It is arranged parallel to the mixing section blade 12, dividing the space between two adjacent mixing section blades 12 into a first channel and a second channel, and making the width of the first channel smaller than that of the second channel.
[0046] During the mixing process, the material entering the mixing zone from the feeding area first enters the first channel. After entering the first channel, as the material moves forward, it is pushed into the second channel by the spiral propulsion process. At the same time, the material is broken and dispersed by the mesh openings of the grid blades 14. Since the width of the second channel is greater than that of the first channel, the pressure in the second channel is lower than that in the first channel. The material located in the first channel is naturally squeezed into the second channel during the compression and conveying process and moves forward with the second channel.
[0047] The arrangement of the first and second channels allows most of the material entering the mixing zone to pass through the grid blades 14 into the second channel, where it is sheared by the grid blades 14, improving the mixing effect and reducing material agglomeration and residue.
[0048] Furthermore, due to the different widths of the first and second channels, there will be a difference in flow rate. The material enters the second channel with a lower flow rate from the first channel with a higher flow rate, where it is mixed with the material that was originally in the second channel, further eliminating the problem of uneven local binder concentration.
[0049] In some possible embodiments, an anti-stick liner is provided in the inner cavity of the mixer housing 4, and scraper strips are provided on the edge of the spiral blades, with the scraper strips adhering to the surface of the anti-stick liner.
[0050] The anti-stick liner is typically made of polytetrafluoroethylene (PTFE) with a thickness of 3-5 mm, and is fixed to the inner wall of the mixer housing 4 by adhesive bonding. The scraper blades are continuously arranged along the edge of the spiral blades, made of polyurethane elastomer, and have an "L-shaped" or "arc-shaped" cross-section. The scraper blades can be detachably connected to the blade edge using bolts.
[0051] The elastic deformation capability of the scraper can compensate for the slight radial runout when the blade rotates, ensuring that the scraper always fits tightly against the surface of the anti-stick liner, without any dead corners in the cleaning process; at the same time, the elastic material can prevent rigid collisions between the scraper and the liner, preventing scratches on the liner or breakage of the scraper.
[0052] like Figure 1 As shown, a dust collector ash cold-pressed briquette mixing system is also provided. Its characteristic is that it employs the dust collector ash cold-pressed briquette mixing equipment described above, and further includes a raw material subsystem and a metering subsystem. The raw material subsystem includes a tar silo 1, a raw material silo, an additive silo, and a water tank. The metering subsystem is located above the feed inlet and is used to measure the weight of the raw materials conveyed by each silo in the raw material subsystem. The metering subsystem includes a raw material metering device 3, an additive metering scale, and a water metering scale 2. The outlet of the metering subsystem is connected to the feed inlet. Both the raw material metering device 3 and the additive metering scale can be powder metering scales.
[0053] The dust collector ash cold briquette mixing system provided by this utility model adopts the above-mentioned dust collector ash cold briquette mixing equipment, which has all the beneficial effects it possesses. The metering subsystem weighs and measures each part of the raw materials, so that they quantitatively enter the inner cavity of the mixing machine shell 4 and are stirred evenly by the mixing machine shell 4, so as to ensure that materials of different densities are fully mixed, and to ensure the uniformity of the wet mixture and the strength and composition stability of the cold briquette.
[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A dust collector cold-pressed briquette mixing equipment, characterized in that, include: The mixing machine housing (4) has an inlet at the upper end and an outlet at the lower end. The inlet and outlet are located at opposite ends of the length of the mixing machine housing (4). Two stirring shafts (10) are symmetrically arranged in the inner cavity of the mixer housing (4), and the ends of the stirring shafts (10) are connected to a drive mechanism; The spiral blades are arranged around the outside of the stirring shaft (10). The spiral blades include feed section blades (11), mixing section blades (12) and discharge section blades (13) connected in sequence. The pitch of the feed section blades (11), the mixing section blades (12) and the discharge section blades (13) gradually decreases. The crushing component is located on the outside of the stirring shaft (10), extending radially outward along the stirring shaft (10) and situated in the gap between adjacent layers of the mixing section blades (12).
2. The dust removal ash cold-pressed briquetting mixing equipment as described in claim 1, characterized in that, The helical blades on the two stirring shafts (10) are staggered and overlapping in axial projection, with the overlap width being greater than one-third of the width of the helical blades.
3. The dust removal ash cold-pressed briquette mixing equipment as described in claim 1, characterized in that, The surfaces of the feed section blade (11) and the mixing section blade (12) are provided with grinding teeth (15), the grinding teeth (15) are spaced apart, and the grinding teeth (15) protrude from the surface of the spiral blade.
4. The dust removal ash cold-pressed briquetting mixing equipment as described in claim 3, characterized in that, The end of the grinding tooth (15) is arc-shaped.
5. The dust removal ash cold-pressed briquette mixing equipment as described in claim 1, characterized in that, The crushing component is a grid blade (14), and the grid blade (14) is parallel to the mixing section blade (12).
6. The dust removal ash cold-pressed briquetting mixing equipment as described in claim 5, characterized in that, The mesh of the mesh blade (14) is diamond-shaped.
7. The dust removal ash cold-pressed briquette mixing equipment as described in claim 5, characterized in that, The gap between two adjacent layers of the mixing section blades (12) is divided into a first channel and a second channel by the grid blades (14). The first channel is located on the side of the grid blades (14) near the feed inlet. The width of the first channel is smaller than the width of the second channel.
8. The dust removal ash cold-pressed briquette mixing equipment as described in claim 1, characterized in that, An anti-stick liner is provided in the inner cavity of the mixer housing (4), and a scraper is provided on the edge of the spiral blade, with the scraper adhering to the surface of the anti-stick liner.
9. A dust collector ash cold-pressed briquette mixing system, characterized in that, The dust removal ash cold pressing briquetting equipment as described in any one of claims 1-8 was adopted.