White mud recovery and comprehensive utilization device

Abstract

The invention relates to the technical field of environmental protection, and particularly discloses a white mud recovery and comprehensive utilization device. Comprising a dewatering mechanism and a screening mechanism, and the screening mechanism is used for separating dewatered white mud into large-particle white mud and small-particle white mud and conveying the large-particle white mud and the small-particle white mud to a crushing mechanism and a mixing mechanism correspondingly; the fragmentation mechanism is used for fragmenting large-particle white mud into small-particle white mud meeting the required particle size and conveying the fragmented white mud to the mixing mechanism; the material mixing mechanism at least comprises a first material mixing barrel and a second material mixing barrel, the material mixing mechanism detects the attribute of the mixed material through a detection assembly arranged on the conveying mechanism, and the small-particle white mud and the mixed material are fed into the first material mixing barrel or the second material mixing barrel for material mixing according to the detection result; and the white mud mixed by the mixing mechanism is processed into a shape corresponding to the white mud in use through a forming mold of the forming mechanism, so that the market adaptability and competitiveness of the white mud recovery device are improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, and in particular to a white mud recovery and comprehensive utilization device. Background Art

[0002] White mud, as a solid waste inevitably generated in the industrial production process, mainly comes from various industries such as papermaking, ceramics, and bauxite processing. This waste contains high moisture, fine particles, and a certain amount of organic matter. Its properties are between mud and solid particles, presenting a unique semi-fluid state. With the increasingly stringent environmental protection requirements and the popularization of the concept of resource recycling, people have gradually realized the great potential of white mud in resource utilization. White mud contains rich calcium, silicon, aluminum and other components, which make it have the potential to be used as a building material, organic fertilizer or adsorbent raw material. However, due to the extremely high initial moisture content of white mud (usually above 85%) and the uneven distribution of particle size, it is difficult for traditional treatment methods to directly meet the requirements of white mud reuse. Therefore, in order to achieve the effective resource utilization of white mud, new treatment technologies and methods must be developed to reduce its moisture content and improve the particle size distribution, so that it can be better used in the production process of building materials, organic fertilizers or adsorbents. In this way, not only can environmental pollution be reduced, but also the recycling of resources can be achieved, bringing more economic and environmental benefits to society.

[0003] The patent "Method of using papermaking white mud as raw material for cement production" (publication number CN1986472A, hereinafter referred to as prior art 1) discloses a method of making cement from white mud. In prior art 1, the flue gas with waste heat discharged from the cement kiln is used to dry the white mud through a high-efficiency fluidized bed dryer, so that the drying cost of the white mud is lower than the price of limestone. At the same time, the key to the influence of white mud on the quality of cement lies in the residual alkali in the white mud, which is removed during the drying process. In addition, the process formula for producing high-grade cement from white mud is developed, and the comprehensive recovery efficiency of white mud calcium carbonate resources must reach more than 90%.

[0004] Under the existing technology 1 and existing technical conditions, the utilization of white mud is usually relatively single. This means that a specific device or equipment can often only recycle and reuse white mud for a specific target product. However, in today's market environment, if a company is limited to producing only one product, it will become quite difficult for it to survive in the competition. On the other hand, if a variety of different machines and equipment are used to process white mud, although the diversity of products can be increased, the cost of doing so is a significant increase in costs. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a white mud recovery and comprehensive utilization device to solve the problem that the white mud treatment device in the prior art has a single treatment method and is difficult to flexibly adjust according to the physical properties and application requirements of the white mud, resulting in the white mud being able to be used for only a single purpose and unable to give full play to its resource utilization potential.

[0006] The embodiment of the present invention provides a white mud recovery and comprehensive utilization device, comprising a dehydration mechanism for dehydrating the white mud, and a screening mechanism connected to the dehydration mechanism, wherein the screening mechanism is used to separate the dehydrated white mud into large-particle white mud and small-particle white mud, and transport the large-particle white mud and the small-particle white mud to a crushing mechanism and a mixing mechanism respectively; the crushing mechanism is used to crush the large-particle white mud into small-particle white mud that meets the required particle size, and transport the crushed white mud to the mixing mechanism; the mixing mechanism at least comprises a first mixing barrel and a second mixing barrel, the mixing mechanism detects the properties of the mixed material through a detection component arranged on the conveying mechanism, and according to the detection result, the small-particle white mud and the mixed material are transported to the first mixing barrel or the second mixing barrel for mixing; the first mixing barrel and / or the second mixing barrel can perform mixing operations of the same or different target products; the white mud mixed by the mixing mechanism is processed into a shape corresponding to the purpose of the white mud by a molding mold of a molding mechanism.

[0007] Preferably, the dehydration mechanism includes a casing and a dehydration bin arranged inside the casing; a rotatable spiral dehydration body is provided in the dehydration bin; a dehydration extrusion thread with a diameter decreasing from the feed end to the discharge end is provided on the rotating shaft of the spiral dehydration body; a screw groove for the white mud to pass through is formed between the dehydration extrusion thread and the inner wall of the dehydration bin; a crushing tool is provided on the rotating shaft outside the discharge port of the dehydration bin, and the crushing tool performs the first crushing on the white mud output from the dehydration bin.

[0008] Preferably, the screening mechanism includes a frame and a screening part arranged on the frame; the screening part includes a screen and a mobile screening frame arranged on the screen; the mobile screening frame is driven by a motor and slides based on the two ends of the frame, and the mobile screening frame performs a second crushing and extrusion on the fallen white mud when sliding, so that the white mud passes through the screen; the screening part is arranged at an angle, and the two sides of the screen are respectively arranged with smaller screen holes and larger screen holes; wherein the smaller screen holes are arranged at the higher end of the screening part, and the larger screen holes are arranged at the lower end of the screening part.

[0009] Preferably, the mixing mechanism includes a base and a multi-station table movable on the base, and the multi-station table is provided with at least two stations for respectively setting the first mixing barrel and the second mixing barrel; the first mixing barrel or the second mixing barrel is moved to a preset position through the multi-station table, receives the small-particle white mud from the screening mechanism and / or the crushing mechanism and the mixed material from the conveying mechanism, and mixes the materials in the first mixing barrel or the second mixing barrel.

[0010] Preferably, the conveying mechanism includes at least a first conveying path for conveying the mixed material and a second conveying path for conveying the mixed white mud; the second conveying path is also provided with at least a first conveying branch and a second conveying branch; the second conveying path is provided with at least one diverter plate, and the diverter plate connects the second conveying path with the first conveying branch or the second conveying branch; the ends of the first conveying branch and the second conveying branch are provided with molding molds of different shapes.

[0011] Preferably, the mixing mechanism detects the properties of the mixed material through a detection component arranged on the conveying mechanism, including at least one of the following methods: detecting the hardness of the mixed material using a durometer after the first conveying path starts conveying operation, detecting the pH value of the mixed material using a pH meter after the first conveying path starts conveying operation, detecting the density of the mixed material using a weighing system after the first conveying path starts conveying operation, detecting the particle size of the mixed material using a contour sensor after the first conveying path starts conveying operation, and detecting the shape of the mixed material using a contour sensor after the first conveying path starts conveying operation.

[0012] Preferably, the step of feeding the small-particle white mud and the mixed materials into the first mixing barrel or the second mixing barrel for mixing according to the detection results includes: feeding the mixed materials with higher hardness into the first mixing barrel, feeding the neutral to strongly alkaline mixed materials into the first mixing barrel, feeding the mixed materials with higher density into the first mixing barrel, feeding the mixed materials with larger particle size into the first mixing barrel, and feeding the mixed materials with irregular shape into the first mixing barrel; feeding the mixed materials with lower hardness into the second mixing barrel, feeding the weakly acidic to weakly alkaline mixed materials into the second mixing barrel, feeding the mixed materials with lower density into the second mixing barrel, feeding the mixed materials with smaller particle size into the second mixing barrel, and feeding the mixed materials with regular shape into the second mixing barrel.

[0013] Preferably, the white mud mixed by the mixing mechanism is processed into a shape corresponding to the purpose of the white mud by a molding die of a molding mechanism, including at least one of the following methods: the molding die can be processed into a powder shape according to the purpose of the white mud mixed by the mixing mechanism, the molding die can be processed into a granular shape according to the purpose of the white mud mixed by the mixing mechanism, the molding die can be processed into a block shape according to the purpose of the white mud mixed by the mixing mechanism, the molding die can be processed into a plate shape according to the purpose of the white mud mixed by the mixing mechanism, the molding die can be processed into a strip shape according to the purpose of the white mud mixed by the mixing mechanism, the molding die can be processed into a hollow block shape according to the purpose of the white mud mixed by the mixing mechanism, and the molding die can be processed into a porous block shape according to the purpose of the white mud mixed by the mixing mechanism.

[0014] Preferably, the end of the first conveying branch and / or the second conveying branch is provided with a forming mold in at least one of the shapes of powder, granular, block, plate, strip, hollow block, and porous block.

[0015] Preferably, the particle size of the small-particle white mud is less than or equal to 2 mm; the particle size of the large-particle white mud is greater than 2 mm; the diameter of the smaller sieve hole is less than or equal to 2 mm; and the larger sieve hole is greater than 2 mm and less than or equal to 10 mm.

[0016] The white mud recovery and comprehensive utilization device provided by the present invention has the following beneficial effects:

[0017] In the present invention, by setting up multiple mixing barrels (such as a first mixing barrel and a second mixing barrel), differentiated mixing operations can be performed according to different needs to produce a variety of target products. The system integrates five functional modules of dehydration, screening, crushing, mixing and molding, and replaces multiple independent devices with an assembly line design, thereby reducing overall equipment investment and operating costs. Each functional module can operate independently or work in collaboration, and the device working mode can be dynamically adjusted according to actual needs to improve equipment utilization. The detection component on the conveying mechanism can automatically detect material properties and intelligently distribute white mud to the appropriate mixing barrel to reduce human intervention. The automated detection and diversion mechanism improves processing efficiency and reduces the requirements for the technical level of operators. By adjusting the screening, mixing and molding mechanisms, the production modes of different target products can be quickly switched to achieve the production of multiple formulas and target products and reduce equipment downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following is a brief introduction to the drawings required for use in the embodiment of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0019] Figure 1 It is a schematic diagram of a white mud recovery and comprehensive utilization device;

[0020] Figure 2 It is a structural schematic diagram of a dehydration mechanism of a white mud recovery and comprehensive utilization device;

[0021] Figure 3 yes Figure 2 Schematic diagram of the local structure;

[0022] Figure 4 It is a schematic diagram of the cross-sectional structure of the crushing mechanism;

[0023] Figure 5 is a schematic structural diagram of a second conveying path;

[0024] Figure 6 It is a structural schematic diagram of a dehydration mechanism of a white mud recovery and comprehensive utilization device;

[0025] Figure 7 It is a structural schematic diagram of a screening mechanism of a white mud recovery and comprehensive utilization device;

[0026] Figure 8 It is another structural schematic diagram of a screening mechanism of a white mud recovery and comprehensive utilization device;

[0027] Parts and numbers in the picture:

[0028] 100-dehydration mechanism, 110-housing, 111-dehydration bin, 112-spiral dehydration body, 113-rotating shaft, 114-feeding end, 115-discharging end, 116-dehydration extrusion thread, 117-screw groove, 120-crushing cutter; 131-feeding port, 132-discharging port, 133-driving device, 134-nylon filter cloth, 141-blocking plate, 142-chute;

[0029] 200-screening mechanism, 210-frame, 211-screening part, 212-screen, 213-mobile screening frame, 214-screening plate;

[0030] 300-crushing mechanism, 310-crushing chamber, 320-crushing cylinder, 321-crushing hammer, 330-driving motor, 341-white mud inlet, 342-white mud outlet;

[0031] 400 - mixing mechanism, 410 - base, 420 - multi-station table, 421 - first mixing cylinder, 422 - second mixing cylinder;

[0032] 500-forming mechanism;

[0033] 600 - conveying mechanism, 610 - first conveying path, 620 - second conveying path, 621 - first conveying branch, 622 - second conveying branch, 623 - diverter plate, 624 - third conveying branch. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the drawings in the embodiment of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Moreover, the term "includes", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of further restrictions, the elements defined by the phrase "comprising..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements. If there is no conflict, the embodiments of the present invention and the various features in the embodiments can be combined with each other, all within the protection scope of the present invention.

[0035] Example 1

[0036] See also Figure 1 The embodiment of the present invention provides a white mud recovery and comprehensive utilization device, which can effectively reprocess the waste white mud generated in the industrial production process, thereby converting it into at least two different types of recyclable materials.

[0037] In this embodiment, special attention is paid to the use of recycled white mud in cement production and as a soil conditioner. In addition, after further development and application, the recycled white mud can also be used as a material for other purposes such as an adsorbent, thereby greatly improving the comprehensive utilization rate of white mud, reducing environmental pollution, and achieving sustainable development of resources.

[0038] The present embodiment is a white mud recovery and comprehensive utilization device, which includes a dehydration mechanism 100, whose main function is to dehydrate the white mud so that the water content of the white mud reaches a treatable state.

[0039] Under normal circumstances, when the water content of white mud is between 70% and 85%, it will present a plastic state, which is very similar to wet soil; when the water content is in the range of 65% to 70%, the white mud can be refined, and after refinement, it will not stick together to form a large particle; if the water content is lower than 65%, the white mud will present a solid state, similar to dry soil. In view of the fact that the processing steps of the white mud in this embodiment include the processes of crushing and mixing, therefore, adjusting the water content of the white mud to between 65% and 70% is the most suitable processing condition for this embodiment. Such a water content not only ensures the plasticity of the white mud during the processing, but also avoids the bonding problem caused by too high a water content, so that the white mud can be processed more smoothly in the subsequent processing steps.

[0040] See also Figure 1 In this embodiment, a screening mechanism 200 is connected to the dewatering mechanism 100. The function of the screening mechanism 200 is to further separate the dehydrated white mud into large particles of white mud and small particles of white mud. After the white mud is dehydrated, it enters the screening mechanism 200 to screen the size of the particles; after the screening is completed, the screening mechanism 200 will transport the large particles of white mud and the small particles of white mud to different locations respectively. Specifically, the large particles of white mud will be transported to the crushing mechanism 300, and the small particles of white mud will be transported to the mixing mechanism 400. The function of the crushing mechanism 300 is to further crush the large particles of white mud into small particles of white mud that meet the specific particle size requirements. After the crushing is completed, these small particles of white mud will continue to be transported to the mixing mechanism 400 so that the materials can be mixed in the mixing mechanism 400 to form a uniform mixture and complete the mixing step of the target mixture.

[0041] In the present embodiment, the small-particle white mud mentioned refers to those white mud particles that are suitable in size and can be directly put into the mixing device for mixing. The diameter of these small-particle white mud is usually no more than 2mm, and such a size can ensure good uniformity during the mixing process. On the other hand, large-particle white mud refers to those white mud particles that need to be further crushed to meet the mixing requirements. The diameter of these large-particle white mud is greater than 2mm but no more than 10mm. Such size restrictions are to avoid excessive particles, thereby affecting the efficiency and effect of subsequent crushing processes.

[0042] In this embodiment, the mixing mechanism 400 is composed of at least two main parts, namely the first mixing barrel 421 and the second mixing barrel 422. The two mixing barrels are responsible for processing different target products. The first mixing barrel 421 is mainly responsible for mixing a certain specific target product (cement), while the second mixing barrel 422 is used for mixing another target product (soil conditioner). Through such a setting, the mixing process of each specific target product is carried out independently, which means that the mixing process of the mixed material and the white mud is separated by two mixing barrels, thereby ensuring the consistency of the processing process and avoiding the phenomenon of interference between multiple different mixed materials when mixing. In addition, due to the independence of the processing process, any adverse side effects that may occur between different products can also be effectively prevented, thereby ensuring the quality and performance of the final product. This independent processing method not only improves production efficiency, but also ensures that each product can be accurately processed according to its specific process requirements.

[0043] Furthermore, the mixing mechanism 400 is responsible for mixing various raw materials in a predetermined ratio to obtain uniformly mixed white mud. Since only a comprehensive device for recycling is provided in this embodiment, the types and ratios of materials for mixing white mud and mixed materials are not described in detail.

[0044] After being mixed with the mixed material, the raw white clay is fed into the molding mechanism 500, which includes a plurality of different types of molding molds. These molds are set in different shapes and / or sizes according to the final use of the white clay. Through the processing of the molding mechanism 500, the white clay is molded into a specific shape that matches the intended use, thereby preparing for subsequent use.

[0045] See also Figure 2 The dehydration mechanism 100 includes a casing 110 and a dehydration bin 111 arranged inside the casing 110; a rotatable spiral dehydration body 112 is arranged in the dehydration bin 111; a dehydration extrusion thread 116 with a diameter decreasing from a feed end 114 to a discharge end 115 is arranged on a rotating shaft 113 of the spiral dehydration body 112: a screw groove 117 for white mud to pass through is formed between the dehydration extrusion thread 116 and the inner wall of the dehydration bin 111: a crushing tool 120 is arranged on the rotating shaft 113 outside the discharge port 132 of the dehydration bin 111, and the crushing tool 120 performs the first crushing on the white mud output from the dehydration bin 111.

[0046] The dehydration mechanism 100 further includes a feed port 131 and a discharge port 132, wherein the feed port 131 is disposed on the housing 110 and communicates with the dehydration bin 111. The spiral dehydration body 112 is connected to the driving device 133 through its rotating shaft 113. The driving device 133 drives the white mud entering the dehydration bin 111 from the feed port 131 to gradually move forward along the screw groove 117. The white mud is dehydrated by the dehydration extrusion screw thread 116 and the inner wall of the dehydration bin 111, so that the water in the white mud is discharged through the water leakage hole disposed at the bottom of the dehydration bin 111. The dehydrated white mud is discharged from the discharge port 132 of the dehydration bin 111. Since the water content of the white mud is dehydrated to between 65% and 70% in the dehydration mechanism 100, the white mud at this time has plasticity during the processing process, and the bonding problem caused by excessively high water content is avoided. Therefore, when the white mud is discharged, since the white mud is in an extruded state in the dehydration bin 111, there may be adhesion. Therefore, the discharged white mud is broken up by the crushing cutter 120 so that the white mud that may be stuck together can be broken up when discharged.

[0047] See also Figure 3 Furthermore, a nylon filter cloth 134 is arranged above the leaking hole at the bottom of the dehydration bin 111. The material of the nylon filter cloth 134 is nylon fiber, which has excellent wear resistance and tensile strength and can maintain good filtering performance under high pressure. The nylon filter cloth 134 has a high filtering accuracy and can effectively prevent the white mud particles from being discharged through the leaking hole due to the extrusion during dehydration, and can only allow the wastewater squeezed out of the white mud to be discharged through the nylon filter cloth 134.

[0048] See also Figure 1 and Figure 8In this embodiment, the screening mechanism 200 divides the screening process into two different areas, which correspond to areas with different sizes of sieve holes. Specifically, one area is an area with smaller sieve holes, and the other area is an area with larger sieve holes. After the material is dehydrated by the dehydration mechanism 100 and completed, the white mud will fall directly into the area with smaller sieve holes in the screening mechanism 200. In this process, the mobile screening frame 213 is driven by the motor to slide back and forth frequently on the frame 210. This movement causes friction and contact between the falling white mud and the screening plate 214, thereby achieving a crushing effect. At the same time, the material may also fall directly on the screen 212, and the screen plate 214 applies pressure to the white mud, prompting the white mud to pass through the pores of the screen 212. Since the screening part 211 is arranged in an inclined manner, when the larger white mud particles cannot be discharged through the end with a small aperture, these particles will slide along the screen 212 and finally be discharged through the end with a large aperture. This design not only improves the screening efficiency, but also ensures that particles of different sizes can be effectively separated and processed. The white mud screened by the screening mechanism 200 enters the mixing device or the crushing mechanism 300 through the large holes and the small holes respectively, and the white mud crushed by the crushing mechanism 300 can re-enter the mixing mechanism 400 for mixing. The mobile screening frame 213 is connected to an external driving device through a transmission shaft to drive the mobile screening frame 213.

[0049] See also Figure 7 and Figure 8 Furthermore, the movable screening frame 213 arranged on the surface of the screen 212 can generate vibrations during the reciprocating motion, and the scraping of the white mud on the screen 212 by the screening plate 214 can also generate vibrations, and these vibrations can function as an effective vibration device. Its main function is to prevent the white mud from clogging the screen holes on the screen 212, thereby ensuring the smooth progress of the screening process.

[0050] See also Figure 4In this embodiment, the crushing mechanism 300 is mainly composed of a crushing chamber 310 and a crushing cylinder 320 installed in the crushing chamber. A plurality of crushing hammers 321 are evenly distributed on the surface of the crushing cylinder 320, and the function of these crushing hammers 321 is to effectively crush the white mud entering the crushing chamber 310. In order to ensure the crushing effect and efficiency, the crushing cylinder 320 can rotate based on both sides of the crushing chamber 310. In order to achieve this rotation function, the crushing cylinder 320 is powered by an external drive motor 330, and the drive motor 330 is connected to the crushing cylinder 320 by transmission, ensuring the stable and efficient operation of the crushing cylinder 320. In addition, in order to facilitate the entry and exit of materials, the top of the crushing chamber 310 is set as a white mud inlet 341, and the bottom is set as a white mud outlet 342. Such a setting not only ensures the smooth flow of materials, but also facilitates subsequent processing procedures. The white mud outlet 342 is directly connected to the mixing mechanism 400, which means that the white mud after the crushing process can seamlessly enter the mixing stage, thereby improving the continuity and efficiency of the entire production process. Through this arrangement, it can be ensured that the white mud can quickly and continuously enter the next process, that is, the mixing operation, after the crushing process, thereby avoiding the waste and pollution that may occur during the storage and transfer of materials.

[0051] In this embodiment, if the particle size of the white mud after the screening process can reach the predetermined standard, it means that the white mud has successfully passed at least two crushing steps. Such treatment ensures that the particle size of the white mud meets the requirements of the subsequent mixing process, so that it can be evenly mixed with other ingredients, thereby ensuring the quality of the final product. However, if the particle size of the white mud after the screening process still fails to meet the specified standard, the white mud will be guided into the crushing mechanism 300 for a third crushing process. Through this multiple crushing method, it can be ensured that the particle size of the white mud particles reaches the standard required for mixing with other ingredients, thereby ensuring the smooth progress of the mixing process and the quality consistency of the final product.

[0052] See also Figure 5 The mixing mechanism 400 includes a base 410 and a multi-station table 420 that can move on the base 410, and the multi-station table 420 is provided with at least two stations for respectively setting the first mixing barrel 421 and the second mixing barrel 422; the first mixing barrel 421 or the second mixing barrel 422 is moved to a preset position through the multi-station table 420, receives the small-particle white mud from the screening mechanism 200 and / or the crushing mechanism 300 and the mixed material from the conveying mechanism 600, and mixes the materials in the first mixing barrel 421 or the second mixing barrel 422.

[0053] In this embodiment, the first mixing barrel 421 is provided with a mixing bin and a stirring part arranged inside the mixing bin. The top of the mixing bin is designed to be open, so that the mixing barrel can conveniently receive the white mud and various mixed materials from the crushing mechanism 300 and the screening mechanism 200. In order to facilitate the input and output of materials, the bottom of the mixing bin is specially designed with a through hole connected to the feeding pipeline. When the mixing operation is carried out, this through hole is closed to prevent the material from leaking during the mixing process: when the mixed material needs to be transported to other places, the through hole will be opened so that the material can be smoothly transported through the feeding pipeline. The stirring part not only includes a spiral stirring member, but also includes a member that provides power through an external driving member. In the actual processing process, the operator will add the white mud and the mixed material into the mixing bin, and then start the external driving member to make the spiral stirring member start to rotate. As the stirring member rotates, the white mud and the mixed material are fully mixed in the mixing bin until the preset mixing time is reached. After this process is completed, the mixing operation is completed, and the materials have been fully mixed and can be processed or used in the next step. The first mixing barrel 421 and the second mixing barrel 422 are configured in the same manner. The first mixing barrel 421 and the second mixing barrel 422 can be used to process different or the same target products.

[0054] See also Figure 1 and Figure 6 The conveying mechanism 600 includes at least a first conveying path 610 for conveying mixed materials and a second conveying path 620 for conveying mixed white mud; the second conveying path 620 is also provided with at least a first conveying branch 621 and a second conveying branch 622; the second conveying path 620 is provided with at least one diverter plate 623, and the diverter plate 623 connects the second conveying path 620 with the first conveying branch 621 or the second conveying branch 622: the ends of the first conveying branch 621 and the second conveying branch 622 are provided with molding molds of different shapes; further, a third conveying branch 624 can also be provided.

[0055] When in use, the mixed material is transported through the first conveying path 610, and the mixed material is transported to the mixing mechanism 400, so that the mixed material can be mixed with the white mud in the mixing mechanism 400. The diverter plate 623 is provided with two pieces, namely the first diverter plate and the second diverter plate: the first diverter plate and the second diverter plate are respectively arranged on the inner side of the guide rail on the second conveying path 620. When only one of the mixing drums is needed for mixing, the first conveying branch 621 or the second conveying branch 622 is guided and diverted by the diverter plate 623 arranged on the inner side of the guide rail on the second conveying path 620. The diverter plate 623 moves to one side of the first conveying branch 621 or the second conveying branch 622, so that the material is guided to the other side. The diverter plate 623 is moved by the external force applied by a plurality of diverter cylinders arranged on the outer side of the diverter plate 623.

[0056] Furthermore, a slider is connected to the end of the piston rod on the diverter cylinder, and the other end of the slider is connected to the corresponding position of the diverter plate. When the piston rod of the diverter cylinder is extended, the slider is dragged to cause the corresponding position of the diverter plate to be displaced; when multiple positions are displaced by different distances respectively, movement at a preset angle is achieved.

[0057] In the actual application scenario, there are two mixing drums, each of which undertakes a different processing task. Specifically, the main responsibility of the first mixing drum is to process the target product cement, while the second mixing drum is used to process another target product soil conditioner. These two products cannot be mixed during the processing because they each have different chemical properties and uses. In order to ensure the smooth progress of the processing process, a dedicated delivery branch is designated for each product. In other words, the cement product will be transported through the first delivery branch 621, while the soil conditioner product will be transported through the second delivery branch 622.

[0058] In the industrial production process, white mud contains a relatively high calcium content, especially those calcium-containing minerals, such as calcium carbonate, calcium sulfate and calcium hydroxide. These sources of calcium can be directly used as basic raw materials in the production of calcium products. Due to the high calcium content in white mud, it has become a relatively low-cost and abundant source of calcium, which is of considerable value for industrial production. Therefore, in the process of recycling and treating white mud, processing it into various calcium products is undoubtedly the most cost-effective option.

[0059] White mud can be converted into a variety of calcium compounds through high temperature treatment or chemical reaction, such as calcium oxide (CaO), which can be used in cement, steel, environmental protection (such as wastewater treatment) and other industries. Calcium hydroxide (Ca(OH)2) can be used in wastewater treatment, soil conditioner, construction, disinfection and other products. Calcium carbonate (CaCO3) can be used in construction, ceramics, papermaking, fertilizers and other products. Calcium sulfate (CasO4) can be used in gypsum, building materials and other products.

[0060] For example, during the production process, if the target product is the first type of product (gypsum), the second diverter plate is moved to a specific position by the diverter cylinder. This position can ensure that the second conveying branch 622 is completely closed, thereby preventing the first type of product from passing through the second conveying path 620. In this way, all the first type of products can only be conveyed through the set first conveying branch 621, ensuring the correct diversion and processing of the products.

[0061] Correspondingly, when our target product is changed to the second type of product (soil conditioner), the first diverter plate is moved to a position that can completely close the first conveying branch 621 through the diverter cylinder. The purpose of this action is to ensure that the soil conditioner product transported on the second conveying path 620 can only be transported through the second conveying branch 622, thereby avoiding the mixing of the soil conditioner and cement, and ensuring the purity and quality of the soil conditioner product.

[0062] In the context of today's ever-changing market, in order to better adapt to market demand, the processing equipment for recycling white mud has been comprehensively reorganized and improved. The original white mud recycling equipment has limitations in design and can only recycle and convert white mud into a single type of product. However, in actual industrial applications, it is far from enough to produce only one product, and this singleness will limit the flexibility and market competitiveness of the enterprise. Therefore, the reorganized and improved white mud recycling and comprehensive utilization equipment is now able to produce at least gypsum, soil conditioner, fertilizer and other calcium products. Nevertheless, during the production process, the staff sometimes confuses the mixing barrels corresponding to different products, or forgets to adjust the mixing barrels to adapt to the production needs of different products, which will lead to the wrong matching of the mixing barrels. In order to solve this problem, at least one detection component needs to be set up for accurate detection of the mixed material. Through this detection, it can be determined whether the mixed material is a mixed material for the production of gypsum, soil conditioner or other calcium products. With such a test result, the mixing barrel can be adjusted accordingly to ensure that each product can be mixed with the correct mixing barrel, thereby improving production efficiency and product quality.

[0063] At the starting path of the mixed material, a detection area is provided, and the detection components described below are all provided in the detection area, and the mixed material is detected in the detection area.

[0064] Setting the detection interval: Usually, a batch of specific mixed materials will continuously pass through the conveying mechanism 600 for mixing. This means that during the mixing process of this batch of specific mixed materials, only one detection is required to ensure that the mixed materials match the mixing barrel. Once the detection is completed and the corresponding matching is completed, there is no need to detect again during the process of the entire batch of materials continuing to pass through the conveyor belt for mixing. Only when the second batch of mixed materials begins to enter the conveyor belt and is ready for mixing, it is necessary to re-test to ensure that the second batch of materials can also match the mixing barrel that is suitable for it, so as to avoid mixing the mixing barrels.

[0065] In this embodiment, the mixing mechanism 400 detects the properties of the mixed material through the detection component set on the conveying mechanism 600. These detection methods include but are not limited to the following: First, after the first conveying path 610 starts the conveying operation, a hardness tester can be used to detect the hardness characteristics of the mixed material. Generally, a dynamic indentation hardness tester is set in the detection area, and the surface of the mixed material is loaded for a short time by the indenter, and the loading depth is measured. The equipment automatically records the indentation depth or rebound speed of the indenter. The material properties are determined according to the hardness data, and the detection results are stored.

[0066] Since the mixed materials used for the first type of target product (gypsum) are limestone, sulfuric acid, clay and other substances, the hardness is roughly in the range of 1.5-2 Mohs hardness; and the mixed materials of the second type of target product (soil conditioner) are generally organic materials such as animal manure and plant residues, which are generally not specially processed during mixing and usually have a Mohs hardness range of 3-7.

[0067] Therefore, the mixed materials with higher hardness are the mixed materials of the second category of products, and the mixed materials with lower hardness are the mixed materials of the first category of products.

[0068] Secondly, after the first conveying path 610 starts conveying, a pH meter may be used to detect the pH value of the mixed material; and a contact probe may be used to detect the pH value of the surface of the mixed material in the detection area.

[0069] The pH value of white mud is usually neutral to slightly acidic (pH value range is 6.5-7.5). It is a material containing more silicate minerals, which has little effect on the pH value itself and is mainly used to provide calcium and other mineral components.

[0070] When producing the first type of product (gypsum), the lime (quicklime / slaked lime) in the mixed materials is an alkaline material (pH value is around 12), which will significantly increase the pH during mixing and bring strong alkalinity. Sulfur is acidic (low pH value, ranging from 4-5), and it will produce sulfuric acid after dissolution, lowering the pH of the mixture. The pH value of clay is usually between 7 and 8, which is neutral or slightly alkaline, and can alleviate excessive acid-base fluctuations.

[0071] Therefore, the pH of the first product mixture will be dominated by the strong alkalinity of lime. If the lime content is high, the pH of the mixture will be alkaline; if the sulfur ratio is high, it may slightly reduce the pH value, but the pH of the first mixture is generally alkaline, with a pH value between 8 and 10.

[0072] The mixed materials of the second category of products include organic matter such as compost (such as animal manure and plant residues). The acidity and alkalinity of animal manure vary depending on the type of animal and diet. The manure of herbivorous animals (such as cattle, sheep, and horses) is usually neutral or slightly alkaline, with a pH range of approximately 7 to 8, because their diet is mainly grass, which contains more alkaline substances such as calcium and potassium. The pH value of pig manure usually ranges from 6.5 to 7.5, which is relatively neutral. As microorganisms decompose organic matter differently during the composting process, the acidity and alkalinity of animal manure will change. The pH value of composted manure generally tends to be neutral or slightly alkaline, usually between 7 and 8. This is because the composting process produces some alkaline substances (such as hydrogen) to neutralize acidic substances.

[0073] Decayed organic matter (such as rotting plant residues) usually tends to be acidic, especially in the early stages of decomposition, because during the decomposition process, some organic acids (such as acetic acid, lactic acid, humic acid, etc.) are released, which will reduce the pH of the compost or decaying matter, usually between 5 and 6.

[0074] When animal manure and plant residues are mixed, the pH value will be affected by both components: if there is more animal manure in the mixture, especially the manure of herbivorous animals, the pH value may tend to be neutral to slightly alkaline. If there are more plant residues in the mixture, especially the residues of acidic plants (such as pine, conifers, citrus plants, etc.), the pH value may be acidic. Therefore, the pH value of the mixture will depend on the ratio of animal manure and plant residues, as well as their respective pH values. Generally speaking, the pH value after mixing may be between 6 and 7, which is neutral or slightly acidic.

[0075] Therefore, the pH value of the mixed materials of the first category of products is in the range of 8-10, which is alkaline, while the pH value of the mixed materials of the second category of products is in the range of 6-7, which is neutral or slightly acidic. Therefore, the mixed materials with alkaline pH values ​​are the mixed materials of the first category of products, and the mixed materials with neutral or slightly acidic pH values ​​are the mixed materials of the second category of products.

[0076] Furthermore, after the first conveying path 610 starts the conveying operation, the density can be automatically calculated by a weighing system combined with a volume measurement mechanism or a density tester.

[0077] Mixed materials for products in the first category are assumed to be mixed materials used in gypsum production, and their ingredients may include gypsum ore, lime or calcium hydroxide (Ca(OH) 2) The density of gypsum rock is usually about 2.3 to 2.4 g / cm 3 The density of lime (calcium hydroxide) is about 2.2g / cm 3 Their combined density will vary according to the proportion of each component. Generally, the density of the mixed material of the first type of product is roughly 1.8 to 2.3 g / cm 3 The specific value depends on factors such as ingredient ratio and humidity.

[0078] The mixed materials of the second category of products are assumed to be mixed materials for the production of soil conditioners. The density of animal manure (after drying) is about 0.6 to 0.8 g / cm 3 ; The density of plant residues (hay, branches, grass, etc.) is about 0.3 to 1.0 g / cm 3 , depending on the plant type and humidity. The density of humus or compost is usually 0.7 to 1.2 g / cm 3 , depending on its organic content. Usually, the density of the second type of mixed material is roughly 0.8 to 1.5 g / cm 3 between.

[0079] Therefore, the mixed material with higher density is the mixed material of the first type of product, and the mixed material with lower density is the mixed material of the second type of product.

[0080] In addition, after the first conveying path 610 starts the conveying operation, a profile sensor is used to detect the particle size of the mixed material, and a profile sensor is used to detect the shape characteristics of the mixed material.

[0081] In practical applications, one or more detection methods can be set to coexist to achieve a comprehensive detection of the properties of mixed materials. However, in order to consider economic benefits, usually only one detection method is selected. When testing mixed materials to distinguish the mixed materials of the first category of products from the mixed materials of the first category of products, the selection of a convenient and low-cost detection method requires comprehensive consideration of the following factors: equipment cost, detection difficulty, time efficiency and accuracy. In practice, the most convenient and low-cost method is pH detection. The mixed materials of the second category of products are usually neutral or weakly acidic (pH value of about 6-7), while the mixed materials of the first category of products are mostly alkaline (pH value of about 8-10), with significant differences and clear test results. The detection cost is extremely low (pH meter), the operation is simple and does not require complex equipment, which is suitable for large-scale application. Density detection can be an alternative method. The density of construction waste is significantly higher than that of organic fertilizers. The test method is simple (such as water substitution method) and low cost. No precise equipment is required, and high-density and low-density materials can be quickly distinguished.

[0082] Particle size and shape testing is suitable for scenarios that require precise classification, but there may be cross-particle size ranges in mixed materials, resulting in less than ideal differentiation. Although hardness testing is effective, it usually requires the separation of particles individually, which is more complex and not suitable for large-scale applications.

[0083] Therefore, when setting one detection method, it is set as pH value detection or density detection; when multiple detection methods need to be set, they are set as pH value detection and density detection, as well as the other detection methods mentioned above.

[0084] According to the detection results, the process of sending the small-particle white mud and the mixed material into the first mixing barrel 421 or the second mixing barrel 422 for mixing includes:

[0085] First, for mixed materials with higher hardness, they will be sent to the first mixing barrel 421 for mixing. Similarly, for alkaline mixed materials, mixed materials with higher density, mixed materials with larger particle sizes, and mixed materials with irregular shapes, these specific types of materials will also be sent to the first mixing barrel 421 for mixing. This arrangement is to ensure that in the first mixing barrel 421, different detection methods can detect that they are the same material to avoid mixing.

[0086] On the other hand, mixed materials with lower hardness, weakly neutral to weakly acidic mixed materials, mixed materials with lower density, mixed materials with smaller particle sizes, and mixed materials with regular shapes will be sent to the second mixing barrel 422 for mixing to ensure the quality and performance of the final mixture.

[0087] The white mud mixed by the mixing mechanism 400 is processed into a shape corresponding to the use of the white mud by a molding die of the molding mechanism 500, including at least one of the following methods:

[0088] The molding die can be processed into powder according to the purpose of the white mud mixed by the mixing mechanism 400. The powder has fine particles and is easy to dissolve or mix. It can be used as a reaction medium or bonding material, such as gypsum powder, which can be used to manufacture gypsum board, gypsum plaster and as an additive for cement manufacturing.

[0089] The molding die can be processed into granules according to the purpose of the white mud mixed by the mixing mechanism 400. The granules have good fluidity, are easy to transport and evenly distribute, and are suitable for automatic spreading or filling to improve soil granular fertilizer.

[0090] The molding die can be processed into blocks according to the purpose of the white mud mixed by the mixing mechanism 400. The block material has a large volume and good pressure resistance. It is suitable for scenes requiring stability, such as solid bricks. The soil stabilization layer of landfill can be used as a building material (such as gypsum board).

[0091] The molding die can be processed into a plate-like shape according to the purpose of the white mud mixed by the mixing mechanism 400. The plate-like material has high flatness, adjustable strength and toughness, and is suitable for cutting and splicing.

[0092] It can not only be used as decorative board, heat insulation, sound insulation material (such as floor cushion, wall board), but also can be used for furniture or packaging cushion.

[0093] The molding die can be processed into strips according to the purpose of the white mud mixed by the mixing mechanism 400. The long strips are easy to arrange and splice, have high strength and moderate flexibility. They can be used as model building materials or waterproof or plugging materials. The molding die can be processed into hollow blocks according to the purpose of the white mud mixed by the mixing mechanism 400. The hollow block material reduces the weight under the same volume and can improve the heat preservation or sound insulation. It is also easy to process into a complex structure.

[0094] The molding die can be processed into a porous block (such as a honeycomb) according to the purpose of the white mud mixed by the mixing mechanism 400, which has a high specific surface area, good air permeability and adsorption, and is suitable for lightweight structure requirements. It can be used as an adsorbent, catalyst carrier, etc.

[0095] In this embodiment, at least one molding die is configured at the end of the first conveying branch 621 and / or the second conveying branch 622, and the molding die may be one or more of the shapes of powder, granule, block, plate, strip, hollow block, porous block, etc. The arrangement of these molding dies enables the end of the conveying branch to perform corresponding molding processing on the material as required to meet different production requirements.

[0096] For example, powder forming dies can be used to press powder materials into specific shapes; granular forming dies are suitable for further forming granular materials; block, plate, and strip forming dies can be used to press materials into block, plate, or strip shapes; hollow block and porous block forming dies are suitable for producing materials with specific hollow or porous structures. Through such designs, the efficiency of material use and the quality of products can be greatly improved.

[0097] Example 2

[0098] See also Figure 1 The embodiment of the present invention provides a white mud recovery and comprehensive utilization device. In embodiment 1, a work flow and equipment relationship of the white mud recovery and comprehensive utilization device are provided. However, the dehydration pre-pressing time of the white mud is not obtained. Therefore, in this embodiment, a calculation formula for white mud dehydration is provided according to the factors that affect the dehydration of the white mud, which is applied to the dehydration mechanism 100 described in embodiment 1:

[0099]

[0100] Where, T d The time required for dehydration of each cubic meter of white mud (unit: min / m 3 ).

[0101] W0 is the initial water content of white mud; white mud with high water content (80%-90%) mainly comes from white mud after the initial sedimentation or filtration stage. It is common in white mud that has not been effectively dehydrated. The texture of white mud is similar to slurry, which is difficult to use directly and needs to be fully dehydrated. In the estimated calculation, the water content of white mud is taken as 90%.

[0102] W t The target moisture content of the white mud after dehydration; in the mixing, the white mud with medium moisture content (60%-80%) is needed. This white mud is the white mud after preliminary mechanical dehydration. It is suitable for processing after modification or mixing. According to Example 1, the target moisture content of the white mud after dehydration is 70%.

[0103] (W0-W t ) is the difference between the initial water content and the target water content, indicating the amount of water that needs to be removed. t =20%.

[0104] s is the proportion of solid matter in the white mud. The higher the solid content in the white mud, the less the water content, so the solid content of the white mud directly affects the dehydration time.

[0105] To further illustrate, white mud with high solid content is more "thick"; when the solid content is high, the water in the white mud is more tightly bound to the solid particles and is not easy to separate. It takes greater pressure or longer time to expel a unit of water during extrusion. The solid content affects the formation of drainage channels. The internal structure of white mud with high solid content is denser, which reduces the channels for water flow and reduces the dehydration rate. Even if the water content is low, it still takes more time to reach the target moisture content.

[0106] The solid content of white mud varies from source to source. Generally, the solid content ranges from 10% to 30%. Solid substances are mostly sediments from papermaking wastewater, and the main components are inorganic substances (such as calcium carbonate) and a small amount of organic matter (fiber residue). In the estimated calculation, 20% of the solid content in the white mud is taken.

[0107] R is the dehydration rate (m 3 / min), the dehydration rate is the rate of reduction of water content per cubic meter of white mud per unit time, which is the dehydration rate under ideal conditions. In practical applications, the ideal dehydration rate range of the spiral dehydration device is (6-12) L / min, that is, (0.006-0.012) m 3 / min; in the estimated calculation, the ideal dehydration rate is taken as 0.01m 3 / min.

[0108] K m It is the material characteristic factor, which takes into account the influence of the physical properties of white mud such as particle size and viscosity on the dehydration rate. The influence factors of other substances in white mud on the dehydration efficiency (such as particle adhesion, organic matter content, etc.); for example, loose particle structure makes it easier for water to flow more during the dehydration process, so the compression dehydration efficiency is higher, and the value is generally lower, at 0.5-0.7. When the water content is high, the water is easy to remove, and the dehydration amount per unit time is greater. Therefore, the material characteristic factor is 0.7-1.

[0109] K of actual material m Value analysis:

[0110]

[0111]

[0112] Therefore, K m The value is usually between 0.5 and 1.0. In the estimated calculation of this embodiment, the material characteristic factor is taken as 0.8.

[0113] K eIt is the correction of the dehydration rate by the environment and equipment dehydration factors, such as temperature, pressure and dehydration equipment type. The theoretical efficiency provided by the equipment supplier is adjusted in combination with the actual operation conditions, and is usually greater than 1 (good efficiency) or less than 1 (low efficiency). The dehydration rate in the dehydration mechanism 100 described in Example 1 is the dehydration rate under ideal conditions, and no correction measures such as temperature and pressure are provided, but the dehydration mechanism 100 is only provided with a dehydration extrusion thread 116. Therefore, the environment and equipment dehydration factor is taken as 0.95. Therefore, the above values ​​are substituted into the formula:

[0114]

[0115] Therefore, it takes about 2.6 minutes to dewater each cubic meter of white mud.

[0116] Furthermore, in Example 1, it is mentioned that in the process of processing white mud, if the water content of the white mud is very high when entering the dehydration mechanism 100, this may have an adverse effect on the extrusion dehydration effect of the white mud. In order to deal with this problem, a blocking plate 141 is specially provided at the discharge port 132 inside the dehydration bin 111.

[0117] The blocking time of the blocking plate 141 also has an impact on the dehydration effect of the white mud. Therefore, in this embodiment, the blocking time of the blocking plate 141 is calculated by the following formula:

[0118]

[0119] Where, T p It is the estimated duration of the plugging and dehydration of the plugging plate 141 .

[0120] V 仓 The effective volume of the dehydration bin 111 that can accommodate the white mud. The larger the volume, the longer the extrusion time. According to actual application, the effective volume of the dehydration bin 111 is about 0.5m 3 .

[0121] ΔW is the difference between the initial water content and the target water content, indicating the change between the initial water content and the target water content of the white mud. The greater the change in water content, the longer the extrusion time required for dehydration. t =20%, therefore ΔW=20%.

[0122] R is the dehydration rate (m 3 / min), the dehydration rate is the rate of reduction of water content per cubic meter of white mud per unit time, which is affected by equipment performance and operating conditions. In actual applications, the dehydration rate range of the spiral dehydration device is (6-12) L / min, that is, (0.006-0.012) m 3 / min; in the estimated calculation, the dehydration rate is taken as 0.01m 3 / min.

[0123] K f K is the extrusion coefficient, which is used to reflect the efficiency of the extrusion process. Different spiral structure designs and white mud material properties (such as viscosity) will affect the extrusion efficiency. If the extrusion force of the equipment is large, K f Take a value greater than 1; if the extrusion force of the equipment is insufficient or the white mud is too soft, K f Take a value less than 1. According to practical applications, the extrusion coefficient is 1.6.

[0124] Therefore, substituting the above values ​​into the formula:

[0125]

[0126] Since the volume of the dehydration bin 111 in this embodiment is 0.5m 3 Therefore, the amount of white mud entering the dewatering bin 111 for plugging and extrusion for the first time is at most 0.5m 3 Therefore, the plugging time of the white mud that enters the dehydration bin 111 for plugging extrusion for the first time is (6.25 / 2)min=3.125min. Therefore, when the water content of the white mud is high, when it enters the dehydration bin 111 for the first time for dehydration, the plugging plate 141 needs to be closed for 3.125min, that is, 187.5s for plugging extrusion dehydration, so that the subsequent white mud can be subjected to sufficient and uniform extrusion force to ensure the efficiency and quality of dehydration.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A white mud recovery and comprehensive utilization device, characterized in that: The invention comprises a dewatering mechanism (100) for dewatering white mud, and a screening mechanism (200) connected to the dewatering mechanism (100); the screening mechanism (200) is used to separate the dewatered white mud into large white mud particles and small white mud particles, and transport the large white mud particles and the small white mud particles to a crushing mechanism (300) and a mixing mechanism (400) respectively; the crushing mechanism (300) is used to crush the large white mud particles into small white mud particles meeting the required particle size, and transport the crushed white mud to the mixing mechanism (400); The mixing mechanism (400) comprises at least a first mixing barrel (421) and a second mixing barrel (422). The mixing mechanism (400) detects the properties of the mixed material through a detection component arranged on the conveying mechanism, and according to the detection result, sends the small-particle white mud and the mixed material into the first mixing barrel (421) or the second mixing barrel (422) for mixing. The first mixing barrel (421) and / or the second mixing barrel (422) can perform mixing operations of the same or different target products. The white mud mixed by the mixing mechanism (400) is processed into a shape corresponding to the purpose of the white mud by a molding die of a molding mechanism (500).

2. The white mud recovery and comprehensive utilization device according to claim 1 is characterized in that: The dehydration mechanism (100) comprises a housing (110) and a dehydration chamber (111) disposed inside the housing (110); a rotatable spiral dehydration body (112) is disposed inside the dehydration chamber (111); The rotating shaft (113) of the spiral dehydration body (112) is provided with a dehydration extrusion screw thread (116) whose diameter decreases from the feed end (114) to the discharge end (115); a screw groove (117) for the white mud to pass through is formed between the dehydration extrusion screw thread (116) and the inner wall of the dehydration bin (111); A crushing cutter (120) is provided on the rotating shaft (113) outside the discharge port (132) of the dewatering bin (111), and the crushing cutter (120) performs a first crushing on the white mud output from the dewatering bin (111).

3. The white mud recovery and comprehensive utilization device according to claim 1 is characterized in that: The screening mechanism (200) comprises a frame (210) and a screening part (211) arranged on the frame (210); the screening part (211) comprises a screen (212) and a movable screening frame (213) arranged on the screen (212); The movable screening frame (213) is driven by a motor and slides based on the two ends of the frame (210). When sliding, the movable screening frame (213) performs a second crushing and squeezing on the fallen white mud, so that the white mud passes through the screen (212); The screening part (211) is arranged in an inclined manner, and two sides of the screen (212) are respectively arranged with smaller screen holes and larger screen holes; The smaller sieve holes are arranged at a higher end of the screening part (211), and the larger sieve holes are arranged at a lower end of the screening part (211).

4. The white mud recovery and comprehensive utilization device according to claim 1 is characterized in that: The mixing mechanism (400) comprises a base (410) and a multi-station table (420) movable on the base (410), wherein the multi-station table (420) is provided with at least two stations for respectively arranging the first mixing cylinder (421) and the second mixing cylinder (422); The first mixing barrel (421) or the second mixing barrel (422) is moved to a preset position through the multi-station table (420), receives the small-particle white mud from the screening mechanism (200) and / or the crushing mechanism (300) and the mixed material from the conveying mechanism, and mixes the materials in the first mixing barrel (421) or the second mixing barrel (422).

5. The white mud recovery and comprehensive utilization device according to claim 4 is characterized in that: The conveying mechanism at least comprises a first conveying path (610) for conveying the mixed material and a second conveying path (620) for conveying the mixed white mud; The second conveying path (620) is also provided with at least a first conveying branch (621) and a second conveying branch (622); the second conveying path (620) is provided with at least one diverter plate (623), and the diverter plate (623) enables the second conveying path (620) to communicate with the first conveying branch (621) or the second conveying branch (622); Forming dies of different shapes are provided at the ends of the first conveying branch (621) and the second conveying branch (622).

6. The white mud recovery and comprehensive utilization device according to claim 5 is characterized in that: The mixing mechanism (400) detects the properties of the mixed material through a detection component arranged on the conveying mechanism, including at least one of the following methods: After the first conveying path (610) starts conveying, the hardness of the mixed material is detected using a hardness meter; after the first conveying path (610) starts conveying, the pH value of the mixed material is detected using a pH meter; after the first conveying path (610) starts conveying, the density of the mixed material is detected using a weighing system; after the first conveying path (610) starts conveying, the particle size of the mixed material is detected using a contour sensor; after the first conveying path (610) starts conveying, the shape of the mixed material is detected using a contour sensor.

7. The white mud recovery and comprehensive utilization device according to claim 6 is characterized in that: The step of sending the small-particle white mud and the mixed material into the first mixing drum (421) or the second mixing drum (422) for mixing according to the detection result comprises: Feeding mixed materials with higher hardness into the first mixing barrel (421), feeding mixed materials with neutral to strong alkalinity into the first mixing barrel (421), feeding mixed materials with higher density into the first mixing barrel (421), feeding mixed materials with larger particle sizes into the first mixing barrel (421), and feeding mixed materials with irregular shapes into the first mixing barrel (421); The mixed material with lower hardness is fed into the second mixing barrel (422), the mixed material with weak acidity to weak alkalinity is fed into the second mixing barrel (422), the mixed material with lower density is fed into the second mixing barrel (422), the mixed material with smaller particle size is fed into the second mixing barrel (422), and the mixed material with regular shape is fed into the second mixing barrel (422).

8. The white mud recovery and comprehensive utilization device according to claim 6 is characterized in that: The white mud mixed by the mixing mechanism (400) is processed into a shape corresponding to the use of the white mud by a molding die of a molding mechanism (500), including at least one of the following methods: The molding die can be processed into a powder shape according to the purpose of the white mud mixed by the mixing mechanism (400); the molding die can be processed into a granular shape according to the purpose of the white mud mixed by the mixing mechanism (400); the molding die can be processed into a block shape according to the purpose of the white mud mixed by the mixing mechanism (400); the molding die can be processed into a plate shape according to the purpose of the white mud mixed by the mixing mechanism (400); the molding die can be processed into a strip shape according to the purpose of the white mud mixed by the mixing mechanism (400); the molding die can be processed into a hollow block shape according to the purpose of the white mud mixed by the mixing mechanism (400); and the molding die can be processed into a porous block shape according to the purpose of the white mud mixed by the mixing mechanism (400).

9. The white mud recovery and comprehensive utilization device according to claim 8 is characterized in that: The ends of the first conveying branch (621) and / or the second conveying branch (622) are provided with a molding die in at least one of the shapes of powder, granular, block, plate, strip, hollow block, and porous block.

10. A white mud recovery and comprehensive utilization device according to any one of claims 1 to 9, characterized in that: The particle size of the small-particle white mud is less than or equal to 2 mm; The particle size of the large-particle white mud is greater than 2 mm; The smaller sieve hole diameter is less than or equal to 2 mm; The larger sieve hole is greater than 2 mm and less than or equal to 10 mm.

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