CN115338042A - Centrifugal device based on discharge centrifuge - Google Patents
Centrifugal device based on discharge centrifuge Download PDFInfo
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- CN115338042A CN115338042A CN202211265504.7A CN202211265504A CN115338042A CN 115338042 A CN115338042 A CN 115338042A CN 202211265504 A CN202211265504 A CN 202211265504A CN 115338042 A CN115338042 A CN 115338042A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/06—Arrangement of distributors or collectors in centrifuges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
- B04B15/06—Other accessories for centrifuges for cleaning bowls, filters, sieves, inserts, or the like
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Abstract
The invention relates to the technical field of centrifugal equipment, in particular to a centrifugal device based on a discharge centrifuge. According to the invention, the first laser probe and the second laser probe are arranged in the centrifugal barrel, so that the material thickness at the top and the bottom of the centrifugal barrel can be detected, the rotating speed of the swash plate distributor is adjusted according to the detection result, and the uniform distribution of the material on the vertical surface is ensured, so that the liquid in the separated material is well discharged during solid-liquid separation, the stability of material separation is enhanced, meanwhile, the uniform distribution of the material on the horizontal surface is ensured by analyzing the generated thickness curve, the good discharge of the liquid in the separated material is further ensured during solid-liquid separation, and the stability of material separation is enhanced.
Description
Technical Field
The invention relates to the technical field of centrifugal equipment, in particular to a centrifugal device based on a discharge centrifugal machine.
Background
Centrifuges are machines that utilize centrifugal force to separate components of a mixture of liquid and solid particles or liquid and liquid. The centrifugal machine is mainly used for separating solid particles from liquid in suspension, or separating two liquids which have different densities and are insoluble with each other in emulsion; it can also be used to remove liquids from wet solids.
Chinese patent publication No. CN101966490a discloses a vertical centrifuge, which comprises a base, a casing arranged on the base, a cover for covering the casing, a main shaft driven by a motor, and a rotating drum mounted on the main shaft, wherein the rotating drum is positioned in the casing, the rotating drum comprises an inner rotating drum and an outer rotating drum positioned outside the inner rotating drum and sharing a drum bottom with the inner rotating drum, and a cavity is formed between the outer wall of the inner rotating drum and the inner wall of the outer rotating drum; the wall of the inner rotary drum is provided with a filter hole communicated with the cavity, a filter bag used for filtering dirt in the cavity between the inner rotary drum and the outer rotary drum is arranged in the filter hole, and a lotion spray head communicated with an external lotion pipe is arranged in the cavity of the inner rotary drum.
Current general vertical centrifugal equipment when carrying out solid-liquid separation, can't detect the thickness condition of adhering to the material on the inside rotary drum, and the material receives self gravity to influence, and partial material pile is down in the rotary drum probably to appear, and the top portion material is not enough, leads to in centrifugal process, and liquid can not well be got rid of in the material of the latter half, and material separation's quality is unstable.
Disclosure of Invention
Therefore, the invention provides a centrifugal device based on a discharge centrifuge, which is used for solving the problem that the thickness condition of materials attached to an inner rotary drum cannot be detected when solid-liquid separation is carried out by a vertical centrifugal device in the prior art, so that the quality of material separation is unstable.
In order to achieve the above object, the present invention provides a centrifugal device based on a discharge centrifuge, comprising,
the centrifugal barrel is arranged inside the discharge centrifuge;
the centrifugal barrel motor is arranged below the centrifugal barrel and is used for driving the centrifugal barrel to rotate;
the base plate is fixedly connected with the shell of the discharge centrifuge;
the swash plate distributing device is arranged on the base plate, a clamping cavity is arranged in the swash plate distributing device, and a discharge hole is formed in a shell of the swash plate distributing device;
the material conveying channel is used for conveying materials in a suspension state, and a material conveying head is arranged at the tail end of the material conveying channel and is connected with a clamping cavity of the swash plate distributor;
the first laser probe is arranged on the material conveying channel and used for detecting the thickness of the material at the top of the centrifugal barrel;
a second laser probe which is arranged on the base plate through a connecting rod and is used for detecting the thickness of the material at the bottom of the centrifugal barrel,
the central control system is connected with the centrifugal barrel motor, the swash plate distributor, the material conveying channel, the first laser probe and the second laser probe respectively detect the thickness of the materials at the top and the bottom of the centrifugal barrel and transmit the detection result to the central control system, and the central control system judges whether the materials at the top and the bottom of the centrifugal barrel are uniformly distributed according to the detected data and adjusts the rotating speed of the swash plate distributor according to the judgment result; when the material thickness is detected, the first laser probe can continuously acquire a real-time value of the material thickness, the central control system integrates the real-time value to generate a top position thickness curve, analyzes the curve to determine the distribution condition of the material on the inner wall of the centrifugal barrel on the same plane, and judges whether to adjust the rotating speed of the centrifugal barrel according to the distribution condition.
Further, before the centrifugal device operates, the central control system controls the swash plate distributor and the centrifugal barrel motor to operate, the centrifugal barrel and the swash plate distributor rotate in a differential mode, after the centrifugal barrel and the swash plate distributor rotate stably, the material conveying channel conveys suspension materials into the swash plate distributor through the material conveying head, the swash plate distributor distributes the suspension materials onto the inner wall of the centrifugal barrel in a dispersing mode through rotation, and the first laser probe and the second laser probe respectively detect the thicknesses of the materials at the top and the bottom of the centrifugal barrel;
the first laser probe detects the thickness Ld of the material at the top of the centrifugal barrel and transmits the detection result to the central control system, the second laser probe detects the thickness Lb of the material at the bottom of the centrifugal barrel and transmits the detection result to the central control system,
the central control system calculates the difference Lc between the thickness Ld of the material at the top of the centrifugal barrel and the thickness Lb of the material at the bottom of the centrifugal barrel, lc = Ld-Lb, a thickness difference evaluation value Lz is arranged in the central control system,
the central control system compares the difference Lc with the thickness difference evaluation value Lz,
when Lc is less than or equal to Lz, the central control system judges that the inner wall of the centrifugal barrel is uniformly distributed;
when Lc is larger than Lz, the central control system judges that the material distribution on the inner wall of the centrifugal barrel is not uniform, and the central control system adjusts the rotating speed of the swash plate distributor.
Further, the value of the thickness difference evaluation value Lz is determined by the sum of the material thickness Ld at the top and the material thickness Lb at the bottom of the centrifugal barrel, lz = (Lb + Ld) × k, wherein k is a calculation compensation parameter of the thickness difference evaluation value Lz.
Further, when the first laser probe detects the thickness of the material at the top of the centrifugal barrel, the first laser probe detects a real-time value of the position thickness of the top of the corresponding centrifugal barrel and transmits a detection result to the central control system, a detection duration T is arranged in the central control system, when the obtained detection data passes through the detection duration T, the central control system integrates the detected data to generate a top position thickness curve f (d), and for the material thickness Ld at the top of the centrifugal barrel,
wherein T is any moment in the detection duration T;
when the second laser probe detects the thickness of the material at the bottom of the centrifugal barrel, the method is the same as the method for detecting the thickness of the material at the top of the centrifugal barrel by the first laser probe.
Further, when the central control system judges that the material distribution on the inner wall of the centrifugal barrel is not uniform and adjusts the rotating speed of the swash plate distributor, the central control system controls the rotating speed of the swash plate distributor to be increased;
in an initial state, the rotating speed of the swash plate distributor is Va, the central control system adjusts the rotating speed of the swash plate distributor according to the difference Lc, the adjusted rotating speed is Va ', va' = Va x (1 + Lc) × A, and A is a calculation compensation parameter of the difference Lc to the rotating speed.
Further, for the rotating speed Va of the swash plate distributor in the initial state, the central control system determines a basic value of the rotating speed of the swash plate distributor according to the type of turbid liquid and adjusts the basic value according to the density of the turbid liquid;
the central control system is internally provided with a basic value V0 of the rotating speed of the swash plate distributing device, the density of the suspension to be centrifuged is Pz, the central control system is internally provided with a reference density value Pa of the suspension, and when the Pz is less than or equal to the Pa, the central control system selects the basic value V0 of the rotating speed as the rotating speed Va of the swash plate distributing device in an initial state; when Pz is larger than Pa, the central control system calculates the rotating speed Va, va = V0+ (Pz-Pa) multiplied by B of the swash plate distributor, wherein B is a calculation compensation parameter of the density value to the rotating speed.
Further, the central control system analyzes the top position thickness curve f (d) and the material thickness Ld at the top of the centrifugal barrel, the central control system selects the thickness value Lm of the thickest point on the thickness curve f (d) to compare with the material thickness Ld at the top of the centrifugal barrel,
when Lm is larger than or equal to 1.1Ld, the central control system judges that the materials on the inner wall of the centrifugal barrel are not uniformly distributed on the same plane, and adjusts the rotating speed of the centrifugal barrel;
when Lm is less than 1.1Ld, the central control system does not adjust the rotating speed of the centrifugal barrel.
Further, the central control system is internally provided with the wall thickness evaluation value Lq of the centrifugal barrel, and when the material thickness Ld at the top or the material thickness Lb at the bottom of the centrifugal barrel has a value larger than the wall thickness evaluation value Lq of the centrifugal barrel, the central control system controls the material conveying channel to stop conveying the material and controls the centrifugal barrel to rotate at an accelerated speed so as to dehydrate the material on the inner wall of the centrifugal barrel.
Further, the centrifugal device is also provided with,
the washing nozzle is arranged on the substrate and is connected with the central control system;
the scraper is arranged on the base plate through a lifting device, and air injection holes are formed in the scraper and can inject air to assist the scraper in scraping materials on the centrifugal barrel; the scraper is connected with the central control system;
when the dehydration of the materials on the inner wall of the centrifugal barrel is finished, the central control system judges whether the materials need to be washed according to the characteristics of the materials, and when the materials need to be washed, the central control system controls the centrifugal barrel to rotate and controls the washing material spray head to spray washing liquid to the barrel wall; when the materials do not need to be washed, the central control system controls the scraper to scrape the materials on the cylinder wall;
when the scraper scrapes the materials on the cylinder wall, the scraping is divided into two steps, in the first step, the central control system controls the scraper to cut to a specified depth, the central control system controls the centrifugal barrel to rotate, and the scraper moves up and down in the centrifugal barrel through the lifting device to scrape the materials on the cylinder wall; and secondly, when the scraper is close to the wall of the centrifugal barrel, the central control system controls the air injection holes to inject air, the auxiliary scraper scrapes materials attached to the wall of the centrifugal barrel, and the scraped materials are discharged through a bottom discharge hole.
Compared with the prior art, the invention has the beneficial effects that the first laser probe and the second laser probe are arranged in the centrifugal barrel, so that the material thickness at the top and the bottom of the centrifugal barrel can be detected, the rotating speed of the swash plate distributing device is adjusted according to the detection result, and the uniform distribution of the materials on the vertical surface is ensured, so that the liquid in the separated materials is ensured to be well discharged during solid-liquid separation, the stability of material separation is enhanced, meanwhile, the uniform distribution of the materials on the horizontal plane is ensured by analyzing the generated thickness curve, the good discharge of the liquid in the separated materials is further ensured during solid-liquid separation, and the stability of material separation is enhanced.
Further, when comparing the material thickness of centrifugal barrel top and bottom, be provided with the thickness difference evaluation value, when the thickness difference of top and bottom to a certain extent, it is inhomogeneous that the material in the centrifugal barrel distributes, and the material is when distributing on the centrifugal barrel, receives the rotational speed influence of self gravity and sloping cam plate distributing device, through adjusting sloping cam plate distributing device rotational speed, has ensured that the material is even in the distribution of vertical face, thereby when having ensured solid-liquid separation, the good getting rid of liquid in the material of separation has strengthened material separation's stability.
Further, the evaluation value of the thickness difference is influenced by the sum of the thickness of the material at the top and the thickness of the material at the bottom of the centrifugal barrel and shows a positive correlation, when the sum value is larger, the larger the evaluation value of the thickness difference indicates that the material is more integrally attached to the centrifugal barrel, and when the sum value is smaller, the smaller the evaluation value of the thickness difference indicates that the material is less integrally attached to the centrifugal barrel, the smaller the evaluation value of the thickness difference is, so that the accuracy of data evaluation is ensured.
Furthermore, the average value of the thickness of the same detection surface is obtained by detecting the thickness curve, and the accuracy of data evaluation is ensured by comparing the average value of the thickness of the top and the bottom of the centrifugal bucket, so that the difference condition of the thickness of the materials at the top and the bottom of the centrifugal bucket is more objectively represented.
Further, when the material is on distributing the centrifugal barrel, receive the rotational speed influence of self gravity and sloping cam plate distributing device, when the rotational speed is not enough, the condition that centrifugal barrel bottom material is more than the top can appear, consequently, can ensure the material evenly distributed at vertical face through the rotational speed that increases sloping cam plate distributing device to when having ensured solid-liquid separation, the good getting rid of liquid in the material of separation has strengthened material separation's stability.
Further, when the materials are distributed on the centrifugal barrel, the materials are influenced by the self gravity and the rotating speed of the swash plate distributor, and when the density of turbid liquid is high, the rotating speed of the swash plate distributor is increased, so that the uniform distribution of the materials on a vertical surface is ensured, the good discharge of liquid in the separated materials is ensured during solid-liquid separation, and the stability of the material separation is enhanced.
Further, when the thickness difference is constant, the larger the sum of the thickness of the material at the top and the thickness of the material at the bottom of the centrifuge bucket is, the smaller the relativity of the difference between the thickness of the material at the top and the thickness of the material at the bottom of the centrifuge bucket is, so that the smaller the calculation compensation parameter of the difference value to the rotating speed is, and the accuracy of the calculation result is guaranteed.
Further, when the material is attaching to the section of thick bamboo wall of centrifuge bucket, if the speed of centrifuge bucket is too big, the uneven phenomenon of material attachment appears easily, consequently, through carrying out the analysis to the thickness curve that generates, has ensured that the material distribution of horizontal plane is even, and further guarantee when solid-liquid separation, the good getting rid of liquid in the material of separation has strengthened material separation's stability.
Drawings
Fig. 1 is a schematic structural diagram of a centrifugal device based on a discharge centrifuge in the embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a centrifugal device based on a discharge centrifuge according to an embodiment of the present invention.
The invention discloses a centrifugal device based on a discharge centrifuge, which comprises,
a centrifugal barrel 1 arranged inside the discharge centrifuge; micropores are uniformly distributed on the centrifugal barrel 1;
the centrifugal barrel motor 2 is arranged below the centrifugal barrel 1 and is used for driving the centrifugal barrel 1 to rotate;
the base plate 3 is fixedly connected with the shell of the discharging centrifuge;
the swash plate distributing device 4 is arranged on the base plate 3, a clamping cavity is arranged in the swash plate distributing device 4, and a discharging hole is formed in the shell of the swash plate distributing device 4;
the material washing spray head 5 is arranged on the substrate 3 and is connected with the central control system;
the scraper 6 is arranged on the substrate 3 through a lifting device 61, and the scraper 6 is provided with an air injection hole which can inject air to assist the scraper 6 in scraping the materials on the centrifugal barrel 1;
the material conveying channel 7 is used for conveying materials in a suspension state, a material conveying head 71 is arranged at the tail end of the material conveying channel 7, and the material conveying head 71 is connected with a clamping cavity of the swash plate distributing device 4;
the first laser probe 8 is arranged on the material conveying channel 7 and used for detecting the thickness of the material at the top of the centrifugal barrel 1;
a second laser probe 9 which is arranged on the base plate 3 through a connecting rod and is used for detecting the thickness of the material at the bottom of the centrifugal barrel 1,
the central control system is connected with the centrifugal barrel motor 2, the swash plate distributor 4, the washing spray head 5, the scraper 6, the material conveying channel 7, the first laser probe 8 and the second laser probe 9 respectively, the first laser probe 8 and the second laser probe 9 detect the thickness of the materials at the top and the bottom of the centrifugal barrel 1 respectively and transmit the detection result to the central control system, and the central control system judges whether the materials at the top and the bottom of the centrifugal barrel 1 are uniformly distributed according to the detection data and adjusts the rotating speed of the swash plate distributor 4 according to the judgment result; when the material thickness is detected, the first laser probe 8 can continuously obtain a real-time value of the material thickness, the central control system integrates the real-time value to generate a top position thickness curve, analyzes the curve to determine the distribution condition of the material on the same plane of the inner wall of the centrifugal barrel 1, and judges whether to adjust the rotating speed of the centrifugal barrel 1 according to the distribution condition.
According to the invention, the first laser probe 8 and the second laser probe 9 are arranged in the centrifugal barrel 1, so that the material thickness of the top and the bottom of the centrifugal barrel 1 can be detected, the rotating speed of the swash plate distributor 4 is adjusted according to the detection result, and the uniform distribution of the materials on the vertical surface is ensured, thereby ensuring that the liquid in the separated materials is well discharged during solid-liquid separation, enhancing the stability of material separation, meanwhile, the uniform distribution of the materials on the horizontal surface is ensured by analyzing the generated thickness curve, further ensuring that the liquid in the separated materials is well discharged during solid-liquid separation, and enhancing the stability of material separation.
Specifically, before the centrifugal device operates, the central control system controls the swash plate distributor 4 and the centrifugal barrel motor 2 to operate, the centrifugal barrel 1 and the swash plate distributor 4 rotate in a differential manner, after the centrifugal barrel 1 and the swash plate distributor 4 rotate stably, the material conveying channel 7 conveys turbid liquid materials into the swash plate distributor 4 through the material conveying head 71, the swash plate distributor 4 disperses the turbid liquid materials to the inner wall of the centrifugal barrel 1 through rotation, and the first laser probe 8 and the second laser probe 9 respectively detect the thicknesses of the materials at the top and the bottom of the centrifugal barrel 1;
the first laser probe 8 detects the thickness Ld of the material at the top of the centrifugal barrel 1 and transmits the detection result to the central control system, the second laser probe 9 detects the thickness Lb of the material at the bottom of the centrifugal barrel 1 and transmits the detection result to the central control system,
the central control system calculates the difference Lc between the thickness Ld of the material at the top of the centrifugal barrel 1 and the thickness Lb of the material at the bottom of the centrifugal barrel 1, lc = Ld-Lb, a thickness difference evaluation value Lz is arranged in the central control system,
the central control system compares the difference Lc with the thickness difference evaluation value Lz,
when Lc is less than or equal to Lz, the central control system judges that the inner wall of the centrifugal barrel 1 is uniformly distributed;
when Lc is larger than Lz, the central control system judges that the inner wall of the centrifugal barrel 1 is unevenly distributed, and adjusts the rotating speed of the swash plate distributor 4.
When comparing the material thickness of centrifugal barrel 1 top and bottom, be provided with the thickness difference evaluation value, when the thickness difference of top and bottom to a certain extent, it is inhomogeneous to explain the material distribution in centrifugal barrel 1, and the material is when distributing centrifugal barrel 1 on, receives the rotational speed influence of self gravity and sloping cam plate distributing device 4, through adjusting sloping cam plate distributing device 4 rotational speed, it is even to have ensured the distribution of material at vertical face, thereby when having ensured solid-liquid separation, the good getting rid of liquid in the material of separation has strengthened material separation's stability.
Specifically, the value of the thickness difference evaluation value Lz is determined by the sum of the material thickness Ld at the top and the material thickness Lb at the bottom of the centrifuge bucket 1, and Lz = (Lb + Ld) × k, where k is a calculation compensation parameter of the thickness difference evaluation value Lz.
The evaluation value of the thickness difference is influenced by the sum of the thickness of the material at the top and the thickness of the material at the bottom of the centrifugal barrel 1 and shows a positive correlation relationship, the larger the value of the sum is, the more the material is adhered to the centrifugal barrel 1 as a whole, the larger the evaluation value of the thickness difference is, the smaller the value of the sum is, the less the material is adhered to the centrifugal barrel 1 as a whole, and the smaller the evaluation value of the thickness difference is, so that the accuracy of data evaluation is ensured.
Specifically, when the first laser probe 8 detects the thickness of the material at the top of the centrifugal barrel 1, the first laser probe 8 detects the real-time value of the thickness of the top position of the corresponding centrifugal barrel 1 and transmits the detection result to the central control system, the central control system is internally provided with a detection time length T, and when the acquired detection data pass through the detection time length T, the central control system integrates the detected data and generates the integrated detection dataA top position thickness curve f (d) is formed, and for the material thickness Ld at the top of the centrifugal barrel 1,
wherein T is any moment in the detection duration T;
when the second laser probe 9 detects the thickness of the material at the bottom of the centrifugal barrel 1, the method is the same as that of the first laser probe 8 in detecting the thickness of the material at the top of the centrifugal barrel 1.
Through detecting the thickness curve, ask the average value of same detection face thickness, through comparing 1 top of centrifugation bucket with bottom thickness average value, guaranteed the accuracy of data evaluation to more objective performance 1 top of centrifugation bucket and the difference condition of bottom material thickness.
Specifically, when the central control system determines that the inner wall of the centrifugal barrel 1 is unevenly distributed and adjusts the rotating speed of the swash plate distributor 4, the central control system controls the rotating speed of the swash plate distributor 4 to be increased;
in an initial state, the rotating speed of the swash plate distributor 4 is Va, the central control system adjusts the rotating speed of the swash plate distributor 4 according to the difference Lc, the adjusted rotating speed is Va ', va' = Va x (1 + Lc) × A, and A is a calculation compensation parameter of the difference Lc to the rotating speed.
When the material is on distributing centrifugal barrel 1, receive the rotational speed influence of self gravity and sloping cam plate distributing device 4, when the rotational speed is not enough, the condition that 1 bottom material of centrifugal barrel is more than the top can appear, consequently, can ensure through the rotational speed that increases sloping cam plate distributing device 4 that the material is even in the distribution of vertical face to when having ensured solid-liquid separation, the good getting rid of liquid in the material of separation has strengthened material separation's stability.
Specifically, for the rotating speed Va of the swash plate distributor 4 in the initial state, the central control system determines a basic value of the rotating speed of the swash plate distributor 4 according to the type of turbid liquid, and adjusts the basic value according to the density of the turbid liquid;
the central control system is internally provided with a basic value V0 of the rotating speed of the swash plate distributor 4, the density of the suspension to be centrifuged is Pz, the central control system is internally provided with a reference density value Pa of the suspension, and when the Pz is less than or equal to the Pa, the central control system selects the basic value V0 of the rotating speed as the rotating speed Va of the swash plate distributor 4 in an initial state; when Pz is larger than Pa, the central control system calculates the rotating speed Va, va = V0+ (Pz-Pa) multiplied by B of the swash plate distributor 4, wherein B is a calculation compensation parameter of the density value to the rotating speed.
When the materials are distributed on the centrifugal barrel 1, the materials are influenced by the self gravity and the rotating speed of the swash plate distributing device 4, and when the density of turbid liquid is high, the rotating speed of the swash plate distributing device 4 is increased, so that the uniform distribution of the materials on a vertical surface is ensured, the liquid in the separated materials is well discharged during solid-liquid separation, and the stability of the material separation is enhanced.
Specifically, for the calculated compensation parameter a of the difference Lc versus the rotational speed, the value of which is determined by the sum of the material thickness Ld at the top and the material thickness Lb at the bottom of the centrifuge bucket 1, a = (Lb + Ld) ÷ q.
When the thickness difference is fixed, the larger the sum of the thickness of the material at the top and the thickness of the material at the bottom of the centrifugal barrel 1 is, the smaller the relativity of the difference between the thickness of the material at the top and the thickness of the material at the bottom of the centrifugal barrel 1 is, so that the smaller the calculation compensation parameter of the difference value to the rotating speed is, and the accuracy of the calculation result is ensured.
Specifically, the central control system analyzes the top position thickness curve f (d) and the material thickness Ld at the top of the centrifugal barrel 1, the central control system selects the thickness value Lm of the thickest point on the thickness curve f (d) to compare with the material thickness Ld at the top of the centrifugal barrel 1,
when Lm is larger than or equal to 1.1Ld, the central control system judges that the materials on the inner wall of the centrifugal barrel 1 are unevenly distributed on the same plane, and adjusts the rotating speed of the centrifugal barrel 1;
when Lm is less than 1.1Ld, the central control system does not adjust the rotating speed of the centrifugal barrel 1.
When the material is depending on the section of thick bamboo wall to centrifuge bucket 1, if centrifuge bucket 1's speed is too big, the uneven phenomenon of material dependence appears easily, consequently, through the thickness curve to the formation carry out the analysis, has ensured that the material distribution of horizontal plane is even, and further guarantee when solid-liquid separation, the good getting rid of liquid in the material of separation has strengthened material separation's stability.
The central control system is internally provided with the wall thickness evaluation value Lq of the centrifugal barrel 1, and when the thickness Ld of the material at the top or the thickness Lb of the material at the bottom of the centrifugal barrel 1 has a value larger than the wall thickness evaluation value Lq of the centrifugal barrel 1, the central control system controls the material conveying channel 7 to stop material conveying and controls the centrifugal barrel 1 to rotate at an accelerated speed so as to dehydrate the material on the inner wall of the centrifugal barrel 1.
When the dehydration of the material on the inner wall of the centrifugal barrel 1 is finished, the central control system judges whether the material needs to be washed according to the characteristics of the material, and when the material needs to be washed, the central control system controls the centrifugal barrel 1 to rotate and controls the washing material spray head 5 to spray the washing liquid to the barrel wall; when the materials do not need to be washed, the central control system controls the scraper 6 to scrape the materials on the cylinder wall;
when the scraper 6 scrapes the materials on the cylinder wall, the scraping is divided into two steps, in the first step, the central control system controls the scraper 6 to scrape to a specified depth, the central control system controls the centrifugal barrel 1 to rotate, and the scraper 6 moves up and down in the centrifugal barrel 1 through the lifting device 61 to scrape the materials on the cylinder wall; and secondly, when the scraper 6 is close to the wall of the centrifugal barrel 1, the central control system controls the air injection holes to inject air, the auxiliary scraper 6 scrapes the materials close to the wall of the centrifugal barrel 1, and the scraped materials are discharged through a bottom discharge hole.
Through set up the fumarole on scraper 6, make the material that depends on section of thick bamboo wall complete that drops through jet-propelled, prevent to hug closely the unable rejection of material of 1 section of thick bamboo wall of centrifugal bucket, influence the flow of unloading next time.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. A centrifugal device based on a discharge centrifuge is characterized by comprising,
the centrifugal barrel is arranged inside the discharge centrifuge;
the centrifugal barrel motor is arranged below the centrifugal barrel and is used for driving the centrifugal barrel to rotate;
the base plate is fixedly connected with the shell of the discharge centrifuge;
the tilting tray distributor is arranged on the base plate, a clamping cavity is arranged in the tilting tray distributor, and a discharge hole is formed in a housing of the tilting tray distributor;
the material conveying channel is used for conveying materials in a suspension state, and a material conveying head is arranged at the tail end of the material conveying channel and is connected with a clamping cavity of the swash plate distributor;
the first laser probe is arranged on the material conveying channel and used for detecting the thickness of the material at the top of the centrifugal barrel;
a second laser probe which is arranged on the base plate through a connecting rod and is used for detecting the thickness of the material at the bottom of the centrifugal barrel,
the central control system is connected with the centrifugal barrel motor, the swash plate distributor, the material conveying channel, the first laser probe and the second laser probe respectively detect the thickness of the materials at the top and the bottom of the centrifugal barrel and transmit the detection result to the central control system, and the central control system judges whether the materials at the top and the bottom of the centrifugal barrel are uniformly distributed according to the detected data and adjusts the rotating speed of the swash plate distributor according to the judgment result; when the material thickness is detected, the first laser probe can continuously acquire a real-time value of the material thickness, the central control system integrates the real-time value to generate a top position thickness curve, analyzes the curve to determine the distribution condition of the material on the inner wall of the centrifugal barrel on the same plane, and judges whether to adjust the rotating speed of the centrifugal barrel according to the distribution condition.
2. The centrifuge apparatus based on the discharging centrifuge as claimed in claim 1, wherein before the centrifuge apparatus operates, the central control system controls the swash plate distributor and the centrifuge barrel motor to operate, the centrifuge barrel and the swash plate distributor rotate in a differential manner, after the centrifuge barrel and the swash plate distributor rotate stably, the material conveying channel conveys suspension materials into the swash plate distributor through the material conveying head, the swash plate distributor distributes the suspension materials onto the inner wall of the centrifuge barrel through rotation, and the first laser probe and the second laser probe respectively detect the thicknesses of the materials at the top and bottom positions of the centrifuge barrel;
the first laser probe detects the thickness Ld of the material at the top of the centrifugal barrel and transmits the detection result to the central control system, the second laser probe detects the thickness Lb of the material at the bottom of the centrifugal barrel and transmits the detection result to the central control system,
the central control system calculates the difference Lc between the thickness Ld of the material at the top of the centrifugal barrel and the thickness Lb of the material at the bottom of the centrifugal barrel, lc = Ld-Lb, a thickness difference evaluation value Lz is arranged in the central control system,
the central control system compares the difference Lc with the thickness difference evaluation value Lz,
when Lc is less than or equal to Lz, the central control system judges that the inner wall of the centrifugal barrel is uniformly distributed;
when Lc is larger than Lz, the central control system judges that the material distribution on the inner wall of the centrifugal barrel is not uniform, and the central control system adjusts the rotating speed of the swash plate distributor.
3. The discharge centrifuge based centrifuge apparatus of claim 2, wherein the value of the thickness difference evaluation value Lz is determined by the sum of the top material thickness Ld and the bottom material thickness Lb of the centrifuge bucket, lz = (Lb + Ld) × k, where k is a calculated compensation parameter for the thickness difference evaluation value Lz.
4. The centrifuge based on the discharging centrifuge as claimed in claim 3, wherein the first laser probe detects the thickness of the material on the top of the centrifuge bucket when the first laser probe detects the thickness of the material on the top of the centrifuge bucketDetecting the real-time value of the top position thickness of the corresponding centrifugal barrel by a head, transmitting the detection result to the central control system, arranging a detection duration T in the central control system, integrating the detected data when the obtained detection data passes through the detection duration T to generate a top position thickness curve f (d), and regarding the material thickness Ld at the top of the centrifugal barrel,
wherein T is any moment in the detection duration T;
when the second laser probe detects the thickness of the material at the bottom of the centrifugal barrel, the method is the same as the method for detecting the thickness of the material at the top of the centrifugal barrel by the first laser probe.
5. The centrifuge apparatus based on discharge centrifuge of claim 4, wherein when the central control system determines that the inner wall of the centrifuge barrel is unevenly distributed and the central control system adjusts the rotating speed of the swash plate distributor, the central control system controls the rotating speed of the swash plate distributor to be increased;
in an initial state, the rotating speed of the swash plate distributor is Va, the central control system adjusts the rotating speed of the swash plate distributor according to the difference Lc, the adjusted rotating speed is Va ', va' = Va x (1 + Lc) × A, and A is a calculation compensation parameter of the difference Lc for the rotating speed.
6. The centrifugal device based on the discharging centrifuge as claimed in claim 5, wherein for the rotating speed Va of the swash plate distributing device in the initial state, the central control system determines the basic value of the rotating speed of the swash plate distributing device according to the type of the suspension and adjusts the basic value according to the density of the suspension;
the central control system is internally provided with a basic value V0 of the rotating speed of the swash plate distributing device, the density of the suspension to be centrifuged is Pz, the central control system is internally provided with a reference density value Pa of the suspension, and when the Pz is less than or equal to the Pa, the central control system selects the basic value V0 of the rotating speed as the rotating speed Va of the swash plate distributing device in an initial state; when Pz is larger than Pa, the central control system calculates the rotating speed Va, va = V0+ (Pz-Pa) multiplied by B of the swash plate distributor, wherein B is a calculation compensation parameter of the density value to the rotating speed.
7. The centrifuge apparatus based on the discharging centrifuge as claimed in claim 6, wherein the central control system analyzes the top position thickness curve f (d) and the material thickness Ld at the top of the centrifuge bucket, the central control system selects the thickness value Lm of the thickest point on the thickness curve f (d) to compare with the material thickness Ld at the top of the centrifuge bucket,
when Lm is larger than or equal to 1.1Ld, the central control system judges that the materials on the inner wall of the centrifugal barrel are not uniformly distributed on the same plane, and adjusts the rotating speed of the centrifugal barrel;
when Lm is less than 1.1Ld, the central control system does not adjust the rotating speed of the centrifugal barrel.
8. The centrifuge apparatus based on the discharging centrifuge as claimed in claim 7, wherein the centrifuge barrel wall thickness evaluation value Lq is set in the central control system, when the value of the material thickness Ld at the top or the material thickness Lb at the bottom of the centrifuge barrel is larger than the centrifuge barrel wall thickness evaluation value Lq, the central control system controls the material conveying channel to stop material conveying and controls the centrifuge barrel to rotate at an accelerated speed so as to dewater the material on the inner wall of the centrifuge barrel.
9. The discharge centrifuge based centrifugation device of claim 8, wherein the centrifugation device is further provided with,
the washing nozzle is arranged on the substrate and is connected with the central control system;
the scraper is arranged on the base plate through a lifting device, and air injection holes are formed in the scraper and can inject air to assist the scraper in scraping materials on the centrifugal barrel; the scraper is connected with the central control system;
when the dehydration of the materials on the inner wall of the centrifugal barrel is finished, the central control system judges whether the materials need to be washed according to the characteristics of the materials, and when the materials need to be washed, the central control system controls the centrifugal barrel to rotate and controls the washing material spray head to spray washing liquid to the barrel wall; when the materials do not need to be washed, the central control system controls the scraper to scrape the materials on the cylinder wall;
when the scraper scrapes the materials on the cylinder wall, the scraping is divided into two steps, in the first step, the central control system controls the scraper to cut to a specified depth, the central control system controls the centrifugal barrel to rotate, and the scraper moves up and down in the centrifugal barrel through the lifting device to scrape the materials on the cylinder wall; and secondly, when the scraper is close to the wall of the centrifugal barrel, the central control system controls the air injection holes to inject air, the auxiliary scraper scrapes materials attached to the wall of the centrifugal barrel, and the scraped materials are discharged through a bottom discharge hole.
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| CN202211265504.7A CN115338042B (en) | 2022-10-17 | 2022-10-17 | Centrifugal device based on discharge centrifuge |
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| CN202211265504.7A CN115338042B (en) | 2022-10-17 | 2022-10-17 | Centrifugal device based on discharge centrifuge |
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Cited By (1)
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| CN115338042B (en) | 2023-02-03 |
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