CN116351586B - Horizontal spiral discharging filtering type centrifugal machine - Google Patents
Horizontal spiral discharging filtering type centrifugal machine Download PDFInfo
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- CN116351586B CN116351586B CN202310648093.8A CN202310648093A CN116351586B CN 116351586 B CN116351586 B CN 116351586B CN 202310648093 A CN202310648093 A CN 202310648093A CN 116351586 B CN116351586 B CN 116351586B
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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
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/10—Control of the drive; Speed regulating
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Abstract
The invention relates to the field of a filter type centrifuge, in particular to a horizontal spiral discharging filter type centrifuge, which comprises a centrifugal mechanism, a feed pipe, a collector and a central control processor, wherein the central control processor analyzes and acquires the viscosity condition of a solid-liquid mixture based on a viscosity value detected by a viscosity sensor, determines an adjustment mode when the rotating speed of a rotary drum and the power of a feed pump are adjusted based on the acquired viscosity condition, determines whether to correct the power of the feed pump according to a first flow difference value obtained by calculating the first flow and a second flow difference value, determines a correction quantity when the power of the feed pump is corrected, determines a liquid collection state according to the first flow difference value and a second flow difference value obtained by calculating the second flow and a third flow value under the first viscosity condition, corrects the power of the feed pump and the rotating speed of the rotary drum based on the determined liquid collection state, and improves the centrifugal efficiency and effect of the centrifuge.
Description
Technical Field
The invention relates to the field of filter centrifuges, in particular to a horizontal spiral discharge filter centrifuger.
Background
The horizontal spiral discharging filter centrifuge has the advantages of small volume, large yield, high dehydration efficiency, low biscuit filtering and operation cost, and has higher application value, and is widely applied to the departments of chemical industry, water treatment, pharmacy and the like.
Chinese patent publication No.: CN112774876a discloses a horizontal spiral unloading filter centrifuge convenient for unloading, which comprises a base, wherein a cushion block and a supporting block positioned on the right side of the cushion block are fixedly arranged at the top of the base, a protective box is fixedly arranged at the top of the cushion block, a centrifugal chamber is fixedly arranged at the top of the supporting block, and the left side surface of the centrifugal chamber is fixedly connected with the right side surface of the protective box. After the solid materials fall into the solid discharging pipe and the discharging pipe from the centrifugal chamber, the pushing block can be pushed out through the hydraulic cylinder, so that the solid materials in the discharging pipe can be conveniently discharged by the horizontal spiral discharging filter centrifuge, the rotating pipe and the rotating shaft can be driven to rotate through the mutual matching of the two motors, the two driving wheels and the two driven wheels, the rotating drum and the inner drum can be driven to rotate in different directions through the rotating pipe and the rotating shaft, the inner drum can drive the outer spiral to accelerate the discharging of the solid attached on the inner wall of the rotating drum, and the practicability of the spiral discharging filter centrifuge is further improved.
However, the prior art has the following problems:
in the prior art, the rotating speed and the liquid inlet flow of the rotary drum are not considered to be automatically adjusted according to the different viscosities of the liquid to be centrifuged, and the operation parameters in the working process of the centrifugal machine are not monitored and automatically adjusted so as to improve the centrifugal effect.
Disclosure of Invention
In order to solve the problems that the rotating speed and the liquid inlet flow of a rotary drum are not automatically adjusted according to the different viscosities of liquid to be centrifuged and the operation parameters in the working process of a centrifugal machine are not monitored and automatically adjusted so as to improve the centrifugal effect in the prior art, the invention provides a horizontal spiral discharging filter type centrifugal machine, which comprises:
the centrifugal mechanism comprises a rotary drum and a spiral pusher connected with the rotary drum through a differential mechanism, so that the rotary drum and the spiral pusher rotate in a differential mode, and a centrifugal effect is achieved;
the feeding pipe is arranged in the rotary drum so as to input a solid-liquid mixture into the rotary drum, a feeding pump is arranged at a feeding port of the feeding pipe so as to control the flow of the solid-liquid mixture entering the feeding pipe, a first flow sensor is arranged in the feeding pipe so as to detect the first flow, and a viscosity sensor is also arranged in the feeding pipe so as to detect the viscosity value of the solid-liquid mixture;
the collector comprises a first collecting pipe and a second collecting pipe, wherein the first collecting pipe is used for collecting the separating liquid flowing out from a hydrophobic opening arranged on the rotary drum, the second collecting pipe is used for collecting the filtered liquid filtered by a filtering opening arranged on the rotary drum, a second flow sensor is arranged in the first collecting pipe to detect the second flow, and a third flow sensor is arranged in the second collecting pipe to detect the third flow;
the central control processor comprises a viscosity analysis unit, a first correction unit and a second correction unit which are connected with each other,
the viscosity analysis unit is connected with the viscosity sensor, the power device and the feed pump, and is used for analyzing and acquiring the viscosity condition of the solid-liquid mixture based on the viscosity value detected by the viscosity sensor, and judging an adjustment mode when adjusting the rotating speed of the rotating drum and the power of the feed pump based on the analyzed and acquired viscosity condition;
the first correction unit is connected with the feed pump, and is used for judging whether to correct the power of the feed pump according to a first flow difference value obtained by calculating the first flow and the second flow under the condition that the viscosity analysis unit analyzes and obtains the first viscosity, and determining a correction amount when the power of the feed pump is corrected;
the second correction unit is connected with the feeding pump and the power device of the centrifugal mechanism, and is used for determining a liquid collection state according to the first flow difference value and a second flow difference value obtained through calculation of the second flow and the third flow under the condition that the viscosity analysis unit analyzes and obtains second viscosity, and correcting the power of the feeding pump and the rotating speed of the rotating drum based on the determined liquid collection state.
Further, the viscosity analysis unit compares the viscosity value V with a preset viscosity comparison threshold V0, and analyzes and obtains the viscosity condition of the solid-liquid mixture according to the comparison result,
under a first viscosity comparison result, the viscosity analysis unit analyzes and obtains the solid-liquid mixture as a first viscosity condition;
under a second viscosity comparison result, the viscosity analysis unit analyzes and obtains the solid-liquid mixture as a second viscosity condition;
wherein, the first viscosity comparison result is V < V0, and the second viscosity comparison result is V not less than V0.
Further, the viscosity analysis unit determines a power adjustment mode when adjusting the power of the feed pump according to the viscosity condition of the solid-liquid mixture, wherein,
the first power adjustment mode is that the viscosity analysis unit adjusts the power of the feed pump to a first power adjustment value P1;
the second power adjustment mode is that the viscosity analysis unit adjusts the power of the feed pump to a second power adjustment value P2;
the first power adjustment mode needs to meet the condition that the solid-liquid mixture is in a first viscosity state, and the second power adjustment mode needs to meet the condition that the solid-liquid mixture is in a second viscosity state, wherein P1 is more than P2.
Further, the viscosity analysis unit determines a rotation speed adjustment mode when the rotation speed of the rotary drum is adjusted according to the viscosity condition of the solid-liquid mixture, wherein,
the first rotation speed adjusting mode is that the viscosity analyzing unit adjusts the rotation speed of the rotary drum to a first rotation speed adjusting value R1;
the second rotation speed adjusting mode is that the viscosity analyzing unit adjusts the rotation speed of the rotary drum to a second rotation speed adjusting value R2;
the first rotating speed adjusting mode needs to meet the condition that the solid-liquid mixture is in a first viscosity state, and the second rotating speed adjusting mode needs to meet the condition that the solid-liquid mixture is in a second viscosity state, wherein R1 is smaller than R2.
Further, the first correction unit acquires the data acquired by the first flow sensor and the second flow sensor in real time, calculates a first flow difference value DeltaQ, sets DeltaQ=Q1-Q2, wherein Q1 represents a first flow and Q2 represents a second flow, compares the first flow difference value DeltaQ with a preset first flow difference value comparison threshold DeltaQ 1 and a preset second flow difference value comparison threshold DeltaQ 2, determines whether to correct the power of the feed pump according to the comparison result, and determines a correction amount when correcting the power of the feed pump,
under a first flow comparison result, the first correction unit judges that the power of the feed pump needs to be corrected, corrects the power of the feed pump to a first power correction value P11 according to a preset first power correction parameter P11, and sets p11=p1-P11;
under the second flow comparison result, the first correction unit judges that the power of the feed pump is not required to be corrected;
under the third flow rate comparison result, the first correction unit judges that the power of the feed pump needs to be corrected, corrects the power of the feed pump to a second power correction value P12 according to a preset first power correction parameter P11, and sets P12=P1+p11;
the first flow rate comparison result is delta Q & gtor more than delta Q2, the second flow rate comparison result is delta Q1 & gtor less than delta Q & lt delta Q2, and the third flow rate comparison result is delta Q & lt delta Q1, and P11 & lt P12.
Further, the second correction unit acquires the data acquired by the first flow sensor and the second flow sensor in real time and calculates a first flow difference Δq, sets Δq=q1-Q2, and acquires the data acquired by the second flow sensor and the third flow sensor in real time and calculates a second flow difference Δq ', sets Δq' =q2-Q3, wherein Q1 represents a first flow, Q2 represents a second flow, Q3 represents a third flow, and Q1 > Q2 > Q3.
Further, the second correction unit compares the first flow rate difference DeltaQ with a preset third flow rate difference value comparison threshold DeltaQ 3, compares the second flow rate difference value DeltaQ' with a preset fourth flow rate difference value comparison threshold DeltaQ 4, and determines a liquid collection state according to a comparison result,
if the comparison result meets a first preset condition, the second correction unit judges that the liquid collection state is a first liquid collection state;
if the comparison result meets a second preset condition, the second correction unit judges that the liquid collection state is a second liquid collection state;
if the comparison result meets a third preset condition, the second correction unit judges that the liquid collection state is a third liquid collection state;
the first preset condition is DeltaQ not less than DeltaQ 3 and DeltaQ ' <DeltaQ4, the second preset condition is DeltaQ < DeltaQ3 and DeltaQ ' <DeltaQ4, and the first preset condition is DeltaQ not less than DeltaQ 3 and DeltaQ ' > DeltaQ4.
Further, the second correction unit determines a correction manner when correcting the power of the feed pump and the rotation speed of the rotary drum according to the liquid collection state, wherein,
the first correction mode is that the second correction unit corrects the power of the feed pump to a third power correction value P21 according to a preset second power correction parameter P21, the P21=P2-P21 is set, the rotating speed of the rotary drum is corrected to a first rotating speed correction value R21 according to a preset first rotating speed correction parameter R21, and the R21=R2+r21 is set;
the second correction mode is that the second correction unit corrects the rotating speed of the rotary drum to a first rotating speed correction value R21 according to a preset first rotating speed correction parameter R21, and R21=R2+r21 is set;
the third correction mode is that the second correction unit corrects the power of the feed pump to a third power correction value P21 according to a preset second power correction parameter P21, and P21=P2-P21 is set;
the first correction mode needs to meet the requirement that the liquid collection state is the first liquid collection state, the second correction mode needs to meet the requirement that the liquid collection state is the second liquid collection state, and the third correction mode needs to meet the requirement that the liquid collection state is the third liquid collection state.
Further, the second correction unit is further configured to determine whether the centrifuge is abnormal in operation based on the determined liquid collection state, wherein,
and if the liquid collecting state is the first liquid collecting state, the second correcting unit judges that the operation is abnormal.
Further, the rotary drum comprises a first rotary drum and a second rotary drum which are integrally connected, so that the spiral pusher pushes centrifuged solids from the first rotary drum to the second rotary drum, a drainage port is formed in one end of the first rotary drum, so that separation liquid in the first rotary drum flows out of the drainage port, and a plurality of filtering ports are formed in the second rotary drum, so that solids pushed to the second rotary drum by the spiral pusher are filtered.
Compared with the prior art, the centrifugal device comprises the centrifugal mechanism, the feed pipe, the collector and the central control processor, wherein the central control processor analyzes and acquires the viscosity condition of a solid-liquid mixture based on the viscosity value detected by the viscosity sensor, determines the rotating speed of the rotary drum and the adjusting mode when the power of the feed pump is adjusted based on the acquired viscosity condition, determines whether to correct the power of the feed pump according to the first flow difference value calculated by the first flow and the second flow, determines the correction quantity when the power of the feed pump is corrected, determines the liquid collecting state according to the first flow difference value and the second flow difference value calculated by the second flow and the third flow under the first viscosity condition, and corrects the power of the feed pump and the rotating speed of the rotary drum based on the determined liquid collecting state, thereby improving the centrifugal efficiency and effect of the centrifugal machine.
In particular, in the invention, the central control processor adjusts the rotating speed of the rotating drum and the power of the feeding pump based on the viscosity condition of the solid-liquid mixture, in the practical situation, when the operation parameters of the centrifugal machine are the same, the solid-liquid mixture with higher viscosity has a poor centrifugal effect due to stronger interaction force between solids and liquid and the solid-liquid mixture with lower viscosity, so that the rotating speed of the rotating drum is higher when the solid-liquid mixture with higher viscosity is centrifuged than the rotating speed of the rotating drum when the solid-liquid mixture with lower viscosity is centrifuged, and the power of the feeding pump is higher when the solid-liquid mixture with lower viscosity is centrifuged than the power of the feeding pump when the solid-liquid mixture with higher viscosity is centrifuged, thereby guaranteeing the centrifugal effect of the centrifugal machine and simultaneously taking account of the centrifugal efficiency of the centrifugal machine.
In particular, in the present invention, under the condition of a first viscosity with a lower viscosity, the central control processor determines whether to correct the power of the feed pump according to a first flow difference value obtained by calculating the first flow and a second flow, in the actual case, the second flow is a flow of a separation liquid separated from a solid-liquid mixture through primary centrifugation, the separation liquid is a portion of the solid-liquid mixture which is subjected to centrifugation, therefore, the first flow difference value characterizes a primary centrifugation effect of the solid-liquid mixture in a unit time, when the first flow difference value is greater than a certain value, the first flow is required to be reduced to ensure the centrifugation effect of the solid-liquid mixture, and when the first flow difference value is less than a certain value, the first flow is required to be increased to improve the centrifugation efficiency of the solid-liquid mixture, and when the viscosity of the solid-liquid mixture is lower, the interaction force between the solid and the liquid is weaker, so that a better primary centrifugation effect can be achieved through centrifugation, therefore, analysis of the third flow is not required, the data operation amount of the central control processor is reduced, and the centrifugation efficiency and the centrifuge efficiency are improved under the premise that the reliability of the central control processor is ensured.
In particular, in the invention, under the condition of a second viscosity with higher viscosity, the central control processor determines the liquid collecting state according to the first flow difference value and the second flow difference value, in the practical situation, the second flow is the flow of the separating liquid separated from the solid-liquid mixture through primary centrifugation, and the third flow is the flow of the filtered liquid in the solid-liquid mixture which enters the second rotary drum for secondary centrifugation except the separating liquid, so that the first flow difference value represents the primary centrifugation effect of the solid-liquid mixture in unit time, the second flow difference value represents the residual moisture condition in the residual solids after the separating liquid is separated from the solid-liquid mixture, and therefore, the centrifugal condition of the solid-liquid mixture which enters the second rotary drum for secondary centrifugation can be reliably represented according to the first flow difference value and the second flow difference value, the follow-up effective correction of the operation parameters of the centrifugal machine according to the liquid collecting state is ensured, and the centrifugal efficiency and effect of the solid-liquid mixture are ensured.
In particular, in the invention, under the condition of a second viscosity with higher viscosity, the central control processor corrects the rotating speed of the rotary drum according to a second flow difference value obtained by calculating the second flow and a third flow, in the actual condition, the third flow is the flow of filtered liquid which enters the second rotary drum except for separating liquid and is centrifuged again in the solid-liquid mixture, the second flow difference value characterizes the difference value of the separating liquid and the filtered liquid, the second flow difference value is small, the residual moisture content in the residual solid after separating the separating liquid from the solid-liquid mixture by primary centrifugation is high, the centrifugal effect is poor, the rotating speed of the rotary drum needs to be increased, the centrifugal effect is improved, and when the viscosity of the solid-liquid mixture is higher, the interaction force between the solid and the liquid is stronger, so that the centrifugal effect is not needed to be better by primary centrifugation, therefore, the third flow needs to be analyzed, and the centrifugal effect of the solid-liquid mixture is ensured.
Drawings
FIG. 1 is a schematic diagram of a horizontal spiral discharge filter centrifuge according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a central control processor according to an embodiment of the invention;
in the figure, 1: power plant, 2: differential mechanism, 3: first rotary drum, 4: a rotary drum, 5: second drum, 6: feeding pipe, 7: viscosity sensor, 8: first flow sensor, 9: second flow sensor, 10: first collection tube, 11: third flow sensor, 12: second collection tube, 13: spiral pusher, 14: hydrophobic port, 15: and (5) filtering the mouth.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of 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 merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 and 2, which are schematic structural diagrams of a horizontal spiral discharge filter centrifuge and a schematic structural diagram of a central control processor according to an embodiment of the present invention, the horizontal spiral discharge filter centrifuge includes:
the centrifugal mechanism comprises a rotary drum 4 and a spiral pusher 13 arranged in the rotary drum 4, wherein the tail end of the spiral pusher 13 extends to the outside of the rotary drum 4 and is connected with the rotary drum 4 through a differential mechanism 2, and the spiral pusher 13 is connected with the power device 1 so that the power device 1 drives the spiral pusher 13 and the rotary drum 4 to rotate in a differential mode to realize a centrifugal effect;
a feeding pipe 6, which is arranged in the rotary drum 4 to input a solid-liquid mixture into the rotary drum 4, a feeding pump is arranged at a feeding hole of the feeding pipe 6 to control the flow rate of the solid-liquid mixture entering the feeding pipe 6, a first flow sensor 8 is arranged in the feeding pipe 6 to detect the first flow rate, and a viscosity sensor 7 is also arranged in the feeding pipe 6 to detect the viscosity value of the solid-liquid mixture;
a collector including a first collecting pipe 10 for collecting the separated liquid flowing out of a drain port 14 provided on the drum 4, and a second collecting pipe 12 for collecting the filtered liquid filtered by a filter port 15 provided on the drum 4, the first collecting pipe 10 having a second flow sensor 9 provided therein to detect a second flow, and the second collecting pipe 12 having a third flow sensor 11 provided therein to detect a third flow;
the central control processor comprises a viscosity analysis unit, a first correction unit and a second correction unit which are connected with each other,
the viscosity analysis unit is connected with the viscosity sensor 7, the power device 1 and the feed pump, and is used for analyzing and acquiring the viscosity condition of the solid-liquid mixture based on the viscosity numerical value detected by the viscosity sensor 7, and judging an adjustment mode when adjusting the rotating speed of the rotary drum 4 and the power of the feed pump based on the analyzed and acquired viscosity condition;
the first correction unit is connected with the feed pump, and is used for judging whether to correct the power of the feed pump according to a first flow difference value obtained by calculating the first flow and the second flow under the condition that the viscosity analysis unit analyzes and obtains the first viscosity, and determining a correction amount when the power of the feed pump is corrected;
the second correction unit is connected with the feeding pump and the power device 1 of the centrifugal mechanism, and is used for determining a liquid collecting state according to the first flow difference value and a second flow difference value obtained through calculation of the second flow and the third flow under the condition that the viscosity analysis unit analyzes and obtains second viscosity, and correcting the power of the feeding pump and the rotating speed of the rotary drum 4 based on the determined liquid collecting state.
Specifically, the specific form of the central control processor is not limited, and the central control processor can be an external computer, and only needs to complete the functions of data receiving, data sending and data processing, and each unit in the central control processor can be an application program in the computer, which is a mature prior art and is not described herein.
Specifically, the viscosity analysis unit compares the viscosity value V with a preset viscosity comparison threshold V0, wherein V0 is more than 0, and analyzes and obtains the viscosity condition of the solid-liquid mixture according to the comparison result,
under a first viscosity comparison result, the viscosity analysis unit analyzes and obtains the solid-liquid mixture as a first viscosity condition;
under a second viscosity comparison result, the viscosity analysis unit analyzes and obtains the solid-liquid mixture as a second viscosity condition;
wherein, the first viscosity comparison result is V < V0, and the second viscosity comparison result is V not less than V0.
Specifically, the viscosity analysis unit determines a power adjustment mode when adjusting the power of the feed pump according to the viscosity condition of the solid-liquid mixture, wherein,
the first power adjustment mode is that the viscosity analysis unit adjusts the power of the feed pump to a first power adjustment value P1;
the second power adjustment mode is that the viscosity analysis unit adjusts the power of the feed pump to a second power adjustment value P2;
the first power adjustment mode needs to meet the condition that the solid-liquid mixture is in a first viscosity state, and the second power adjustment mode needs to meet the condition that the solid-liquid mixture is in a second viscosity state, wherein P1 is more than P2.
Specifically, the viscosity analyzing means determines a rotation speed adjustment method for adjusting the rotation speed of the drum 4 based on the viscosity of the solid-liquid mixture, wherein,
the first rotation speed adjusting mode is that the viscosity analyzing unit adjusts the rotation speed of the rotary drum 4 to a first rotation speed adjusting value R1;
the second rotation speed adjusting mode is that the viscosity analyzing unit adjusts the rotation speed of the rotary drum 4 to a second rotation speed adjusting value R2;
the first rotating speed adjusting mode needs to meet the condition that the solid-liquid mixture is in a first viscosity state, and the second rotating speed adjusting mode needs to meet the condition that the solid-liquid mixture is in a second viscosity state, wherein R1 is smaller than R2.
Specifically, in the invention, the central control processor adjusts the rotating speed of the rotary drum 4 and the power of the feed pump based on the viscosity condition of the solid-liquid mixture, in the practical situation, when the operation parameters of the centrifugal machine are the same, the solid-liquid mixture with higher viscosity has a poor centrifugal effect due to stronger interaction force between solids and liquid, so that the rotating speed of the rotary drum 4 is higher when the solid-liquid mixture with higher viscosity is centrifuged than the rotating speed of the rotary drum 4 when the solid-liquid mixture with lower viscosity is centrifuged, and the power of the feed pump is higher when the solid-liquid mixture with lower viscosity is centrifuged than the power of the feed pump when the solid-liquid mixture with higher viscosity is centrifuged, thereby guaranteeing the centrifugal effect of the centrifugal machine and simultaneously taking the centrifugal efficiency of the centrifugal machine into consideration.
Specifically, the first correction unit acquires the data acquired by the first flow sensor 8 and the second flow sensor 9 in real time and calculates a first flow difference value Δq, sets Δq=q1-Q2, wherein Q1 represents a first flow and Q2 represents a second flow, compares the first flow difference value Δq with a preset first flow difference value comparison threshold value Δq1 and a preset second flow difference value comparison threshold value Δq2, determines whether to correct the power of the feed pump according to the comparison result, and determines a correction amount when correcting the power of the feed pump,
under a first flow comparison result, the first correction unit judges that the power of the feed pump needs to be corrected, corrects the power of the feed pump to a first power correction value P11 according to a preset first power correction parameter P11, and sets p11=p1-P11;
under the second flow comparison result, the first correction unit judges that the power of the feed pump is not required to be corrected;
under the third flow rate comparison result, the first correction unit judges that the power of the feed pump needs to be corrected, corrects the power of the feed pump to a second power correction value P12 according to a preset first power correction parameter P11, and sets P12=P1+p11;
the first flow rate comparison result is delta Q & gtor more than delta Q2, the second flow rate comparison result is delta Q1 & gtor less than delta Q & lt delta Q2, and the third flow rate comparison result is delta Q & lt delta Q1, P11 & lt 10kw, and P11 & lt P12 & lt 60kw.
Specifically, in the invention, under the condition of a first viscosity with lower viscosity, the central control processor judges whether to correct the power of the feed pump according to the first flow difference value obtained by calculating the first flow and the second flow, in the practical situation, the second flow is the flow of the separating liquid separated from the solid-liquid mixture through primary centrifugation, and the separating liquid is the part of the solid-liquid mixture which is subjected to centrifugal treatment, therefore, the first flow difference value characterizes the primary centrifugal effect of the solid-liquid mixture in unit time, when the first flow difference value is larger than a certain value, the first flow is required to be reduced so as to ensure the centrifugal effect of the solid-liquid mixture, when the first flow difference value is smaller than a certain value, the first flow is required to be increased so as to improve the centrifugal efficiency of the solid-liquid mixture, and when the viscosity of the solid-liquid mixture is lower, the interaction force between the solid and the liquid is weaker, so that the primary centrifugal effect can be better, therefore, the analysis of the third flow is not needed, the data operation quantity of the central control processor is reduced, and the centrifugal efficiency and the centrifugal effect of the centrifugal machine are improved on the premise that the reliability of the central control processor is ensured.
Specifically, the second correction unit acquires the data acquired by the first flow sensor 8 and the second flow sensor 9 in real time and calculates a first flow difference Δq, sets Δq=q1 to Q2, and acquires the data acquired by the second flow sensor 9 and the third flow sensor 11 in real time and calculates a second flow difference Δq ', and sets Δq' =q2 to Q3, wherein Q1 represents a first flow, Q2 represents a second flow, and Q3 represents a third flow, and Q1 > Q2 > Q3.
Specifically, the second correction unit compares the first flow rate difference DeltaQ with a preset third flow rate difference value comparison threshold DeltaQ 3, deltaQ 3 > 0, and compares the second flow rate difference value DeltaQ' with a preset fourth flow rate difference value comparison threshold DeltaQ 4, deltaQ 4 > 0, and determines a liquid collection state according to the comparison result, wherein,
if the comparison result meets a first preset condition, the second correction unit judges that the liquid collection state is a first liquid collection state;
if the comparison result meets a second preset condition, the second correction unit judges that the liquid collection state is a second liquid collection state;
if the comparison result meets a third preset condition, the second correction unit judges that the liquid collection state is a third liquid collection state;
the first preset condition is DeltaQ & gtor more than DeltaQ 3 and DeltaQ ' <DeltaQ4, the second preset condition is DeltaQ & lt DeltaQ 3 and DeltaQ ' <DeltaQ4, and the third preset condition is DeltaQ & gtor more than or equal to DeltaQ 3 and DeltaQ ' > DeltaQ4.
Specifically, in the invention, under the condition of a second viscosity with higher viscosity, the central control processor determines the liquid collecting state according to the first flow difference value and the second flow difference value, in the practical situation, the second flow is the flow of the separating liquid separated from the solid-liquid mixture through primary centrifugation, the third flow is the flow of the filtered liquid in the solid-liquid mixture which enters the second rotary drum 5 for secondary centrifugation except the separating liquid, therefore, the first flow difference value represents the primary centrifugation effect of the solid-liquid mixture in unit time, the second flow difference value represents the residual moisture condition in the residual solids after separating the separating liquid from the solid-liquid mixture, therefore, the centrifugal condition of the solid-liquid mixture which enters the second rotary drum 5 for secondary centrifugation can be reliably represented according to the first flow difference value and the second flow difference value, the follow-up effective correction of the operation parameters of the centrifugal machine according to the liquid collecting state is ensured, and the centrifugal efficiency and effect of the solid-liquid mixture are ensured.
Specifically, the second correction means determines a correction method for correcting the power of the feed pump and the rotation speed of the drum 4 based on the liquid collection state, wherein,
the first correction mode is that the second correction unit corrects the power of the feed pump to a third power correction value P21 according to a preset second power correction parameter P21, p21=p2-P21 is set, the rotating speed of the rotary drum 4 is corrected to a first rotating speed correction value R21 according to a preset first rotating speed correction parameter R21, and r21=r2+r21 is set;
the second correction mode is that the second correction unit corrects the rotation speed of the rotary drum 4 to a first rotation speed correction value R21 according to a preset first rotation speed correction parameter R21, and r21=r2+r21 is set;
the third correction mode is that the second correction unit corrects the power of the feed pump to a third power correction value P21 according to a preset second power correction parameter P21, and P21=P2-P21 is set;
the first correction mode needs to meet the condition that the liquid collection state is the first liquid collection state, the second correction mode needs to meet the condition that the liquid collection state is the second liquid collection state, the third correction mode needs to meet the condition that the liquid collection state is the third liquid collection state, r21 is smaller than 1000r/min, p21 is smaller than 10kw, p21 is smaller than 30kw, and R21 is smaller than 4500r/min.
Specifically, in the invention, under the condition of a second viscosity with higher viscosity, the central control processor corrects the rotating speed of the rotary drum 4 according to a second flow difference value obtained by calculating the second flow and a third flow, in the actual situation, the third flow is the flow of filtered liquid which enters the second rotary drum 5 except separating liquid in the solid-liquid mixture and is centrifuged again, the second flow difference value characterizes the difference value of the separating liquid and the filtered liquid, the second flow difference value is small, the residual moisture content in the residual solid after separating the separating liquid from the solid-liquid mixture by the primary centrifugation is high, the centrifugal effect is poor, the rotating speed of the rotary drum 4 needs to be increased to improve the centrifugal effect, and when the viscosity of the solid-liquid mixture is higher, the interaction force between the solid and the liquid is stronger, so that the centrifugal effect does not need to be better through the primary centrifugation, the third flow is analyzed, and the centrifugal effect of the solid-liquid mixture is ensured.
Specifically, the second correction unit is further configured to determine whether the centrifuge is abnormal in operation or not based on the determined liquid collection state, wherein,
and if the liquid collecting state is the first liquid collecting state, the second correcting unit judges that the operation is abnormal.
Specifically, the rotary drum 4 comprises a first rotary drum 3 and a second rotary drum 5 which are integrally connected, so that the spiral pusher 13 pushes centrifuged solids from the first rotary drum 3 to the second rotary drum 5, a drainage port 14 is arranged at one end of the first rotary drum 3, so that the internal separation liquid flows out of the drainage port 14, and a plurality of filtering ports 15 are arranged on the second rotary drum 5, so that the solids pushed to the second rotary drum 5 by the spiral pusher 13 are filtered.
Thus far, the technical solution of the present invention has 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 protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
Claims (10)
1. A horizontal spiral discharge filter centrifuge, comprising:
the centrifugal mechanism comprises a rotary drum and a spiral pusher connected with the rotary drum through a differential mechanism, so that the rotary drum and the spiral pusher rotate in a differential mode, and a centrifugal effect is achieved;
the feeding pipe is arranged in the rotary drum so as to input a solid-liquid mixture into the rotary drum, a feeding pump is arranged at a feeding port of the feeding pipe so as to control the flow of the solid-liquid mixture entering the feeding pipe, a first flow sensor is arranged in the feeding pipe so as to detect the first flow, and a viscosity sensor is also arranged in the feeding pipe so as to detect the viscosity value of the solid-liquid mixture;
the collector comprises a first collecting pipe and a second collecting pipe, wherein the first collecting pipe is used for collecting the separating liquid flowing out from a hydrophobic opening arranged on the rotary drum, the second collecting pipe is used for collecting the filtered liquid filtered by a filtering opening arranged on the rotary drum, a second flow sensor is arranged in the first collecting pipe to detect the second flow, and a third flow sensor is arranged in the second collecting pipe to detect the third flow;
the central control processor comprises a viscosity analysis unit, a first correction unit and a second correction unit which are connected with each other,
the viscosity analysis unit is connected with the viscosity sensor, the power device and the feed pump, and is used for analyzing and acquiring the viscosity condition of the solid-liquid mixture based on the viscosity value detected by the viscosity sensor, and judging an adjustment mode when adjusting the rotating speed of the rotating drum and the power of the feed pump based on the analyzed and acquired viscosity condition;
the first correction unit is connected with the feed pump, and is used for judging whether to correct the power of the feed pump according to a first flow difference value obtained by calculating the first flow and the second flow under the condition that the viscosity analysis unit analyzes and obtains the first viscosity, and determining a correction amount when the power of the feed pump is corrected;
the second correction unit is connected with the feeding pump and the power device of the centrifugal mechanism, and is used for determining a liquid collection state according to the first flow difference value and a second flow difference value obtained through calculation of the second flow and the third flow under the condition that the viscosity analysis unit analyzes and obtains second viscosity, and correcting the power of the feeding pump and the rotating speed of the rotating drum based on the determined liquid collection state.
2. The horizontal screw discharge filter centrifuge according to claim 1, wherein the viscosity analyzing unit compares the viscosity value V with a preset viscosity comparison threshold V0 and analyzes the viscosity condition of the solid-liquid mixture according to the comparison result, wherein,
under a first viscosity comparison result, the viscosity analysis unit analyzes and obtains the solid-liquid mixture as a first viscosity condition;
under a second viscosity comparison result, the viscosity analysis unit analyzes and obtains the solid-liquid mixture as a second viscosity condition;
wherein, the first viscosity comparison result is V < V0, and the second viscosity comparison result is V not less than V0.
3. The horizontal screw discharge filter centrifuge according to claim 2, wherein the viscosity analyzing unit determines a power adjustment mode when adjusting the power of the feed pump according to the viscosity condition of the solid-liquid mixture, wherein,
the first power adjustment mode is that the viscosity analysis unit adjusts the power of the feed pump to a first power adjustment value P1;
the second power adjustment mode is that the viscosity analysis unit adjusts the power of the feed pump to a second power adjustment value P2;
the first power adjustment mode needs to meet the condition that the solid-liquid mixture is in a first viscosity state, and the second power adjustment mode needs to meet the condition that the solid-liquid mixture is in a second viscosity state, wherein P1 is more than P2.
4. The horizontal screw discharge filter centrifuge according to claim 3, wherein the viscosity analyzing unit determines a rotation speed adjustment manner when the rotation speed of the bowl is adjusted according to the viscosity condition of the solid-liquid mixture, wherein,
the first rotation speed adjusting mode is that the viscosity analyzing unit adjusts the rotation speed of the rotary drum to a first rotation speed adjusting value R1;
the second rotation speed adjusting mode is that the viscosity analyzing unit adjusts the rotation speed of the rotary drum to a second rotation speed adjusting value R2;
the first rotating speed adjusting mode needs to meet the condition that the solid-liquid mixture is in a first viscosity state, and the second rotating speed adjusting mode needs to meet the condition that the solid-liquid mixture is in a second viscosity state, wherein R1 is smaller than R2.
5. The horizontal screw discharge filter centrifuge according to claim 3, wherein the first correction unit acquires the data acquired by the first flow sensor and the second flow sensor in real time and calculates a first flow difference Δq, and sets Δq=q1 to Q2, wherein Q1 represents a first flow and Q2 represents a second flow, and compares the first flow difference Δq with a preset first flow difference comparison threshold Δq1 and second flow difference comparison threshold Δq2, determines whether to correct the power of the feed pump based on the comparison result, and determines a correction amount when the power of the feed pump is corrected,
under a first flow comparison result, the first correction unit judges that the power of the feed pump needs to be corrected, corrects the power of the feed pump to a first power correction value P11 according to a preset first power correction parameter P11, and sets p11=p1-P11;
under the second flow comparison result, the first correction unit judges that the power of the feed pump is not required to be corrected;
under the third flow rate comparison result, the first correction unit judges that the power of the feed pump needs to be corrected, corrects the power of the feed pump to a second power correction value P12 according to a preset first power correction parameter P11, and sets P12=P1+p11;
the first flow rate comparison result is delta Q & gtor more than delta Q2, the second flow rate comparison result is delta Q1 & gtor less than delta Q & lt delta Q2, and the third flow rate comparison result is delta Q & lt delta Q1, and P11 & lt P12.
6. The horizontal screw discharge filter centrifuge according to claim 3, wherein the second correction unit acquires the data acquired by the first flow sensor and the second flow sensor in real time and calculates a first flow difference Δq, sets Δq=q1 to Q2, and acquires the data acquired by the second flow sensor and the third flow sensor in real time and calculates a second flow difference Δq ', sets Δq' =q2 to Q3, wherein Q1 represents a first flow, Q2 represents a second flow, and Q3 represents a third flow, and Q1 > Q2 > Q3.
7. The horizontal screw discharge filter centrifuge according to claim 6, wherein the second correction unit compares the first flow rate difference Δq with a preset third flow rate difference comparison threshold Δq3, and compares the second flow rate difference Δq' with a preset fourth flow rate difference comparison threshold Δq4, and determines a liquid collection state according to the comparison result, wherein,
if the comparison result meets a first preset condition, the second correction unit judges that the liquid collection state is a first liquid collection state;
if the comparison result meets a second preset condition, the second correction unit judges that the liquid collection state is a second liquid collection state;
if the comparison result meets a third preset condition, the second correction unit judges that the liquid collection state is a third liquid collection state;
the first preset condition is DeltaQ & gtor more than DeltaQ 3 and DeltaQ ' <DeltaQ4, the second preset condition is DeltaQ & lt DeltaQ 3 and DeltaQ ' <DeltaQ4, and the third preset condition is DeltaQ & gtor more than or equal to DeltaQ 3 and DeltaQ ' > DeltaQ4.
8. The horizontal screw discharge filter centrifuge according to claim 7, wherein the second correction unit determines a correction manner when correcting the power of the feed pump and the rotation speed of the bowl according to the liquid collection state, wherein,
the first correction mode is that the second correction unit corrects the power of the feed pump to a third power correction value P21 according to a preset second power correction parameter P21, the P21=P2-P21 is set, the rotating speed of the rotary drum is corrected to a first rotating speed correction value R21 according to a preset first rotating speed correction parameter R21, and the R21=R2+r21 is set;
the second correction mode is that the second correction unit corrects the rotating speed of the rotary drum to a first rotating speed correction value R21 according to a preset first rotating speed correction parameter R21, and R21=R2+r21 is set;
the third correction mode is that the second correction unit corrects the power of the feed pump to a third power correction value P21 according to a preset second power correction parameter P21, and P21=P2-P21 is set;
the first correction mode needs to meet the requirement that the liquid collection state is the first liquid collection state, the second correction mode needs to meet the requirement that the liquid collection state is the second liquid collection state, and the third correction mode needs to meet the requirement that the liquid collection state is the third liquid collection state.
9. The horizontal screw discharge filter centrifuge according to claim 8, wherein the second correction unit is further configured to determine whether or not the centrifuge is abnormal in operation based on the determined liquid collection state, wherein,
and if the liquid collecting state is the first liquid collecting state, the second correcting unit judges that the operation is abnormal.
10. The horizontal spiral discharge filter centrifuge of claim 1, wherein the rotating drum comprises a first rotating drum and a second rotating drum which are integrally connected, so that the spiral pusher pushes centrifuged solids from the first rotating drum to the second rotating drum, a drain port is arranged at one end of the first rotating drum, so that the internal separation liquid flows out of the drain port, and a plurality of filter ports are arranged on the second rotating drum, so that solids pushed to the second rotating drum by the spiral pusher are filtered.
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