Coarse slime hydrocyclone classification system
By installing a dual hydraulic cyclone system with column section water replenishment mechanism and pressurized pump in the hydraulic cyclone, cleaning and secondary grading of coarse particulate materials is achieved, and the problems of bottom flow clamping and overflow running are solved, which improves the grading efficiency and simplifies the operation process.
Patent Information
- Application Number
- CN202422137422.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-08-30
AI Technical Summary
During the grading process, existing hydraulic cyclones have problems such as thin bottom flow clamping and overflow running, which leads to inefficient grading and may lead to blockage of water replenishment pipes and waste of resources.
Using a dual hydraulic cyclone system, by installing a water replenishment mechanism in the column section and providing injection power with a pressurized pump, the coarse particulate material is cleaned and secondary graded, and the mixing barrel and the transfer pump are combined to achieve uniform mixing and re-grading of the materials.
It effectively solves the problems of thin bottom flow clamping and overflow thickening, improves grading efficiency, avoids blockage of water replenishment pipes, simplifies the operation process and improves the integration of the system.
Smart Images
Figure CN223197194U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hydraulic classification system, in particular to a coarse coal slime hydrocyclone classification system. Background Art
[0002] Currently, the main process for separating and recovering coarse coal slime is a hydrocyclone + TBS / spiral separator + curved screen + centrifuge system. Coal slime classification utilizes a hydrocyclone. A hydrocyclone is a device used to separate and remove heavier, coarse particles such as mud and sand from wastewater and is sometimes also used for slurry dewatering. The hydrocyclone consists of a hollow cylinder at the top and an inverted cone at the bottom, which connects to the cylinder. These two components form the working cylinder of the hydrocyclone. In addition, the hydrocyclone has a feed inlet, an overflow outlet, and an underflow outlet. Water enters the feed inlet tangentially from the top of a structure or metal pipe by pressure or gravity. Under the action of centrifugal force, coarse particles are thrown toward the wall of the hydrocyclone, where they are rotated downward by the spiral structure inside the hydrocyclone and discharged from the underflow outlet along with the concentrated liquid. Smaller particles, after being rotated to a certain degree, are discharged from the overflow outlet along with the secondary upward vortex.
[0003] However, as the quality of raw coal deteriorates year by year, the content of fine particles increases and the mudification phenomenon becomes more and more serious, resulting in the deterioration of the hydrocyclone classification condition. At the same time, the hydrocyclone is unstable due to the fluctuation of feed concentration, resulting in serious underflow of fine particles and overflow of coarse particles, resulting in waste of high-quality resources. The large content of fine particles in the underflow will lead to increased wear of the curved screen and centrifuge screen basket, and the fine-grained gangue mud will increase the moisture content of the centrifuge product, seriously affecting the normal coal preparation production. Therefore, it is urgent to optimize the classification of coal slime hydrocyclones.
[0004] Currently, there are many technical solutions to improve the classification efficiency of hydrocyclones. Among them, adding clean water to the cone part through secondary slurry making and water replenishment can effectively reduce the amount of fine particles in the underflow of the cyclone, that is, reduce the content of fine particles in the underflow, and achieve relatively good application results in improving the classification efficiency.
[0005] However, in actual applications, it has been found that various existing hydrocyclones adopting secondary slurrying and water replenishment schemes still have problems such as overflow and coarse particle flow, backflow and blockage of slurry in the water replenishment pipe during operation due to problems in structural design. The existence of the above problems not only increases the content of coarse particle components in the overflow, making it impossible to further improve the overall classification efficiency, but also may cause large-particle stones to enter the water replenishment pipe through the water replenishment hole, which not only causes pollution of the water replenishment channel, but may even cause blockage of the water replenishment hole and the water replenishment pipe, resulting in the failure of secondary slurrying and water replenishment.
[0006] Therefore, there is an urgent need for a coarse coal slime hydrocyclone classification system that is simple to operate, easy to maintain, and has high performance and integration. Utility Model Content
[0007] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and provide a coarse coal slime hydrocyclone classification system that is simple to operate, easy to maintain, and has high performance and integration. The coarse coal slime hydrocyclone classification system mainly consists of two hydrocyclones, has a simple structure, is easy to install, and has strong applicability.
[0008] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a coarse coal slime hydrocyclone classification system, characterized in that it includes a water-making hydrocyclone; the water-making hydrocyclone includes a column section, a cone section and a column section outer packaging mechanism, the column section is arranged above the cone section, the column section outer packaging mechanism is arranged on the outside of the column section and is sealed with the side wall of the column section; the column section includes a first feed port, a first overflow port, a jet port and a column section body, the first feed port is located at the upper part of the side wall of the column section body, the first overflow port is located at the top of the column section body, the number of the jet ports is multiple, and the multiple jet ports are evenly spaced on the side wall of the column section body; and are used to spray water to clean the coarse particulate material on the internal wall surface of the column section body; a cavity is provided in the column section outer packaging mechanism, and the cavity is connected to the interior of the column section body through the jet port.
[0009] The above-mentioned coarse coal slime hydrocyclone classification system is characterized in that a water inlet is provided on the column segment outer packaging mechanism, and the number of the water inlets is multiple, and the multiple water inlets are evenly arranged on the surface of the column segment outer packaging mechanism, and the multiple water inlets are all connected to a pressure pump.
[0010] The above-mentioned coarse coal slime hydrocyclone classification system is characterized in that a first bottom flow outlet is provided at the bottom end of the cone portion.
[0011] The above-mentioned coarse coal slime hydrocyclone classification system is characterized in that the coarse coal slime hydrocyclone classification system also includes a classification hydrocyclone; the classification hydrocyclone includes a second bottom flow port and a second feed port; the second bottom flow port is connected to the first feed port through a pipeline, and the second feed port is connected to the first overflow port through a pipeline.
[0012] The above-mentioned coarse coal slime hydrocyclone classification system is characterized in that a stirring barrel is provided in the pipeline connecting the first overflow port and the second feed port; the stirring barrel includes a stirring feed port and a stirring discharge port; the stirring feed port is connected to the first overflow port through a pipeline, and the stirring discharge port is connected to the second feed port through a pipeline.
[0013] The above-mentioned coarse coal slime hydrocyclone classification system is characterized in that a transfer pump is provided in the pipeline connecting the stirring discharge port and the stirring feed port.
[0014] Compared with the prior art, the present invention has the following advantages:
[0015] 1. The utility model changes the current installation position of the water supply mechanism, optimizes the installation of the water supply mechanism in the cone part to the installation of the water supply mechanism in the column part, and uses a pressure pump to ensure the injection power of the injection port, so that the wall surface inside the column part body can also be cleaned, and sufficient water is added to the coal slime inside the column part body, eliminating the problem of underflow.
[0016] 2. The utility model has excellent synergistic benefits. By simply linking the water-making hydrocyclone with the grading hydrocyclone, the effect of one plus one being greater than two can be achieved, which completely solves the problems of overflow coarseness and underflow fineness. By feeding the first overflow product into the second feed port and subjecting the first overflow product to secondary classification in the grading hydrocyclone, the final overflow product obtained will not have the problem of overflow coarseness, while the second underflow product obtained by the secondary classification will still have the problem of fineness. Therefore, the second underflow product is fed into the water-making hydrocyclone again, and when the coarse particles flow along the wall of the water-making hydrocyclone toward the first underflow port, water is sprayed into the interior through the injection port to perform a secondary cleaning of the coarse particles on the wall. The fine particles mixed in the second underflow product will be cleaned out by the water flow and enter the overflow, thereby improving the overall classification efficiency.
[0017] 3. The utility model has a simple structure and is easy to operate. When classifying coarse coal slime, it is only necessary to add water to the column section outer packaging mechanism through the water inlet. After filling, the water flow is directly injected into the interior of the column section body under the action of the pressure pump, and then the feeding is started to complete the cleaning of the coarse particles on the inner wall of the water-feeding hydrocyclone.
[0018] 4. The utility model is flexible in operation, highly integrated, and highly systematic. During operation, water is first added to the column outer packaging mechanism, and then the coarse coal slime to be classified is introduced. At this time, the first overflow product mixed with coarse particles flowing out of the first overflow port of the water-replenishing hydrocyclone is fed into the mixing barrel for uniform mixing. Since the first underflow product is rich in water, there is no underflow containing fine particles. The first overflow product is then fed from the mixing barrel into the grading hydrocyclone, and the final overflow product can be directly obtained from the grading hydrocyclone. While obtaining the final overflow product, the coarse particles in the original first overflow product are fed into the first feed port through the second underflow port, so that the coarse particles are again cleaned by the water jet, and the cleaned fine particles enter the overflow, while the final underflow product flows out of the first underflow port.
[0019] The present invention will be described in further detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural diagram of the present utility model.
[0021] Figure 2 This is a schematic diagram of the coal slime flow direction when the utility model is in working state.
[0022] Figure 3 This is a top view of the water replenishment hydrocyclone of the present invention.
[0023] Figure 4 This is a schematic diagram of the column segment outsourcing mechanism of the utility model.
[0024] Figure 5 It is a schematic diagram of the column section of the utility model.
[0025] Description of the accompanying drawings:
[0026] 1—water replenishment hydrocyclone; 2—classification hydrocyclone; 3—mixing tank;
[0027] 4—transfer pump; 11—column section; 12—cone section;
[0028] 13—column section outsourcing mechanism; 111—first feed port; 112—first overflow port;
[0029] 113—injection port; 114—column section body; 121—first bottom flow port;
[0030] 131—cavity 132—water inlet; 133—boosting pump;
[0031] 21—Second bottom flow port; 22—Second overflow port; 31—Stirring feed port;
[0032] 32—Stirring discharge port. DETAILED DESCRIPTION
[0033] The following examples will further illustrate the present invention, but the present invention is not limited to the following examples.
[0034] like Figure 1 and Figure 2 A coarse coal slime hydrocyclone classification system shown includes a water-making hydrocyclone 1; the water-making hydrocyclone 1 includes a column section 11, a cone section 12, and a column section outer packaging mechanism 13. The column section 11 is arranged above the cone section 12, and the column section outer packaging mechanism 13 is arranged on the outside of the column section 11 and is sealed to the side wall of the column section 11 to ensure that the water used for water-making does not flow out.
[0035] The column section includes a first feed port 111, a first overflow port 112, an injection port 113 and a column section body 114; the first feed port 111 is located at the upper part of the side wall of the column section body 114, the first overflow port 112 is located at the top of the column section body 114, the number of the injection ports 113 is multiple, and the multiple injection ports 113 are evenly spaced on the side wall of the column section body 114; a cavity 131 is provided in the column section outer packaging mechanism 13, and the cavity 131 is connected to the interior of the column section body 114 through the injection port 113, so that the water for water replenishment is stored in the cavity 131, and the water for water replenishment can be injected into the column section body 114 through the injection port 113, so as to clean the coarse material on the inner wall of the water replenishment hydrocyclone 1 while replenishing the coarse coal slime.
[0036] Combine Figures 1 to 5 It can be seen that a water inlet 132 is provided on the column segment outsourcing mechanism 13, and the number of the water inlets 132 is multiple, and the multiple water inlets 132 are evenly arranged on the surface of the column segment outsourcing mechanism 13, and the multiple water inlets 132 are all connected to a pressure pump 133, so that water can evenly enter the cavity 131 of the column segment outsourcing mechanism, and then under the action of the pressure pump 133, the water for replenishing water can be sprayed into the interior of the column segment body 114 with a certain pressure.
[0037] like Figure 1 As shown, a first bottom flow port 121 is provided at the bottom end of the cone portion 12. The bottom flow product flowing out of the first bottom flow port 121 is fully replenished with water and cleaned, so there will be no bottom flow pinching.
[0038] like Figure 1 As shown, the coarse coal slime hydrocyclone classification system further includes a classification hydrocyclone 2; the classification hydrocyclone 2 includes a second bottom flow port 21 and a second feed port 22; the second bottom flow port 21 of the classification hydrocyclone 2 is connected to the first feed port 111 through a pipeline, and the second feed port 22 of the classification hydrocyclone 2 is connected to the first overflow port 112 through a pipeline. The system forms a complete loop, wherein the first overflow product flowing out of the first overflow port 112 contains coarse particles, and the first overflow product is subjected to secondary classification without water replenishment when being processed in the grading hydrocyclone 2, and the overflow product overflowing from the overflow port of the grading hydrocyclone 2 is the final overflow product; and the coarse particles in the first overflow product will flow out from the second underflow port 21, but at this time, the material flowing out of the second underflow port 21 will still have the problem of underflow entrainment, so after the second underflow port 21 is connected to the first feed port 111, the second underflow product can be replenished with water again, so that the coarse particles are washed out and flow out from the first underflow port 121.
[0039] like Figure 2 As shown, a stirring barrel 3 is provided in the pipeline connecting the first overflow port 112 and the second feed port 22; the stirring barrel 3 includes a stirring feed port 31 and a stirring discharge port 32; the stirring feed port 31 is connected to the first overflow port 112 via a pipeline, and the stirring discharge port 32 is connected to the second feed port 22 via a pipeline. The provision of the stirring barrel can improve the grading effect of the grading hydrocyclone 2.
[0040] like Figure 2 As shown, a transfer pump 4 is provided in the pipeline connecting the stirring discharge port 32 and the stirring feed port 31 ; because the stirring barrel 3 is generally lower than the second feed port 22 , a transfer pump is required to provide circulation power for the first overflow product.
[0041] The working principle of this embodiment is as follows:
[0042] First, the water inlet 132 and the pressure pump 133 are opened to allow water to accumulate in the cavity 131 of the column outer structure 13. When the water is accumulated to the point where all the injection ports 113 begin to spray water into the column body 114, the coarse coal sludge is fed from the first feed port 111 to start the normal operation of the water-replenishing hydrocyclone 1. The coarse coal sludge is replenished with a large amount of water in the column body 114, and the generated first overflow product overflows from the first overflow port, and the generated first underflow product flows out from the first underflow port 121. The first overflow product contains coarse particles, while the first underflow product does not contain fine particles.
[0043] After overflowing from the first overflow port 112, the first overflow product is fed into the mixing barrel 3 through the stirring feed port 31. Under the stirring action, the coarse particles and fine particles in the first overflow product are evenly mixed to obtain a mixed product. The mixed product is discharged through the stirring discharge port 31 and fed into the grading hydrocyclone 2 through the second feed port 22 under the action of the transfer pump 4, and the grading work of the grading hydrocyclone 2 is started.
[0044] The mixed product generates a second overflow product, i.e., the final overflow product, and a second underflow product under the action of the grading hydrocyclone 2. Since the first overflow product has undergone a hydraulic classification action by the water-making hydrocyclone 1, which is equivalent to undergoing the classification action of the grading hydrocyclone again, the first overflow product does not contain coarse particles. However, since the second underflow product has not undergone water-making, it must contain fine particles.
[0045] After flowing out from the second underflow port 21, the second underflow product is fed into the first feed port 111 for classification by the water-replenishing hydrocyclone. The coarse particles in the second underflow product flow out from the first underflow port 121 under the action of the water-replenishing hydrocyclone 1, and the fine particles in the second underflow product overflow from the first overflow port 112 and continue to flow into the mixing barrel 3 for circulation until no classified product is produced from either the first underflow port 121 or the second overflow port.
[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural transformation made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.
Claims
1. A coarse coal slime hydrocyclone classification system, characterized in that: The invention comprises a water replenishment hydrocyclone (1); the water replenishment hydrocyclone (1) comprises a column section (11), a cone section (12) and a column section outer packaging mechanism (13); the column section (11) is arranged above the cone section (12); the column section outer packaging mechanism (13) is arranged outside the column section (11) and is sealed to the side wall of the column section (11); The column section comprises a first feed port (111), a first overflow port (112), a jet port (113) and a column section body (114); the first feed port (111) is located at the upper portion of the side wall of the column section body (114); the first overflow port (112) is located at the top of the column section body (114); there are a plurality of jet ports (113); the plurality of jet ports (113) are evenly spaced and arranged on the side wall of the column section body (114) and are used to spray water to clean the coarse particles on the inner wall surface of the column section body (114); A cavity (131) is provided in the column segment outer packaging mechanism (13), and the cavity (131) is communicated with the interior of the column segment body (114) through the injection port (113).
2. A coarse coal slime hydrocyclone classification system according to claim 1, characterized in that: The column segment outer packaging mechanism (13) is provided with a water inlet (132), the number of the water inlets (132) is multiple, the multiple water inlets (132) are evenly arranged on the surface of the column segment outer packaging mechanism (13), and the multiple water inlets (132) are all connected to a pressure pump (133).
3. A coarse coal slime hydrocyclone classification system according to claim 1, characterized in that: The bottom end of the cone portion (12) is provided with a first bottom flow outlet (121).
4. A coarse coal slime hydrocyclone classification system according to claim 1, 2 or 3, characterized in that: The coarse coal slime hydrocyclone classification system further comprises a classification hydrocyclone (2); the classification hydrocyclone (2) comprises a second bottom flow port (21) and a second feed port (22); The second bottom flow port (21) is connected to the first feed port (111) through a pipeline, and the second feed port (22) is connected to the first overflow port (112) through a pipeline.
5. A coarse coal slime hydrocyclone classification system according to claim 4, characterized in that: A stirring barrel (3) is provided in the pipeline connecting the first overflow port (112) and the second feed port (22); The stirring barrel (3) comprises a stirring feed port (31) and a stirring discharge port (32); The stirring feed port (31) is connected to the first overflow port (112) through a pipeline, and the stirring discharge port (32) is connected to the second feed port (22) through a pipeline.
6. A coarse coal slime hydrocyclone classification system according to claim 5, characterized in that: A transfer pump (4) is provided in the pipeline communicating between the stirring discharge port (32) and the stirring feed port (31).