CN201098584Y

CN201098584Y - Rotary press filter intelligent controller

Info

Publication number: CN201098584Y
Application number: CNU2007200642687U
Authority: CN
Inventors: 曾振祥; 王强; 陈望; 李发军
Original assignee: Xiangtan University
Current assignee: Xiangtan University
Priority date: 2007-08-24
Filing date: 2007-08-24
Publication date: 2008-08-13
Anticipated expiration: 2017-08-24

Abstract

An intelligent control device for rotary filter press mainly comprises a main motor, a filtering device connected with the main motor, a sensor, a control valve and a pump connected with the filtering device, a programmable logic controller and a supervisory control computer connected with the sensor, and a frequency converter and a servo-actuator connected with the programmable logic controller and respectively connected with the main motor and the control valve. The intelligent control device measures the variation signal of the rotary filter press via the interconnected main motor, filtering device, sensor, control valve, programmable logic controller, supervisory control computer, frequency converter and servo-actuator and controlling the normal operation of the equipment, and the variation signal is processed by the programmable logic controller and transmitted to the servo-actuator to control and change the opening degree of a discharge valve, so as to accurately control the discharging concentration and overcome the shortcomings of prior rotary filter press including high labor intensity, low operational efficiency, and high running cost and operating cost. The intelligent control device can be used for automatic digital field control system of rotary filter press.

Description

Rotation filter press intelligence controlling device

Technical field

The utility model relates to a kind of rotation filter press control device, the especially a kind of rotation filter press intelligence controlling device that the measuring-signal feedback processing can be controlled automatically.

Background technology

The patent No. formerly by the applicant's application is in " a kind of filter that rotates filter press " of ZL200410022855.0, suspension is squeezed into first order filter chamber by pump, part liquid phase is discharged with the filtrate form by the filter medium of filter chamber, enter next stage owing to sweep after the effect of stream power makes most solid formations suspensions become concentrate, the filter process of repetition first order filter chamber is one-level to the last.Containing solid concentration is the low back of previous stage concentration one-level concentration height in the ordinary course of things, all changes in each grade filter chamber, reaches critical concentration always.The change in concentration of filter chamber is reacted directly into the power output of motor, and the power output of motor is relevant with input current again.After entering normal running, afterbody to contain solid concentration the highest, it contains open degree or discharge rate that charging that solid concentration depends on previous stage contains solid concentration and discharge valve.Can the rotation filter press have been given play to its great advantage and often depend on that containing of afterbody, solid concentration promptly was the concentration of discharging, can the discharge process that depend on afterbody carry out continually and steadily, depends on that simultaneously can each function of rotation filter press keep continually and steadily.

This formerly the weak point of patent be: all operations all is manual carrying out, place one's entire reliance upon site operation personnel's experience of its operation is carried out, and operating personnel only can operate 1 to 2 equipment, and labor intensity of operating staff is big, operating efficiency is low, and operating cost and operating cost are higher.

Summary of the invention

At above-mentioned situation, the purpose of this utility model is will provide a kind of can make the low concentration of its discharging and the workable rotation filter press intelligence controlling device can accurately controlled again of operation, operating cost.

For solving above-mentioned task, a kind of rotation filter press intelligence controlling device, it mainly comprises main motor, be connected in the filter of main motor, be connected in sensor, by-pass valve control and pump on the filter, be connected in the programmable logic controller (PLC) and the supervisory control comuter of sensor, the frequency converter that is connected in programmable logic controller (PLC) is connected with by-pass valve control with main motor respectively with servomotor.

For structure optimization, its further step is:

Filter comprises the mechanically-sealing apparatus that is connected in main motor, is connected in the first order filter chamber of mechanically-sealing apparatus, middle filter chamber and back level filter chamber.

Sensor comprises the pressure sensor B of the current sensor that is connected in main motor, the pressure sensor A that is connected in mechanically-sealing apparatus, first order filter chamber, is connected in temperature sensor and the solute concentration sensor and the flow of filtrate sensor of back level filter chamber.

By-pass valve control comprises the grouping washing magnetic valve that is connected in filter top, is connected in the grouping filtrate magnetic valve and the discharge valve and the filtrate main valve that are connected in the filter rear portion of filter bottom.

The front of discharge valve is provided with servomotor.

Programmable logic controller (PLC) comprises PLC module and EM235 module.

The utility model adopts and comprises main motor, filter, sensor, by-pass valve control, pump, programmable logic controller (PLC), supervisory control comuter, frequency converter, the interconnecting and be controlled among the normal operation of equipment of critical pieces such as servomotor, it directly is connected with main motor with current sensor and measures its variable signal, after programmable logic controller (PLC) is handled, pass to servomotor and control and change the open degree of its discharge valve, reach the technical scheme of its discharging concentration of accurate control, it is big to have overcome existing rotation filter press labor intensity of operating staff, operating efficiency is low, the defective that operating cost and operating cost are higher.

The beneficial effect that the utility model has compared to existing technology:

(1) after rotation filter press intelligence controlling device reaches steady operation, its discharge equilibrium concentration is measured the current value of main motor by current sensor, in conjunction with adopting fuzzy control program, servomotor on the discharge valve is implemented control, reach the opening degree of real-time its discharge valve of control, improved the automatic control performance and the operating performance of this machine greatly.

(2) filter can carry out control operation by the various predetermined data of setting fully when normal operation, constantly carry by the various signals that sensor is gathered to programmable logic controller (PLC), supervisory control comuter is the constantly operation of automatic feedback control filter then, thereby make the rotation filter press realize full-automatic intelligent control, reach and reduce operating cost and operating cost greatly, the various effects of this machine are brought into play to greatest extent.

The utility model can be used for rotating the digital on-the-spot automatic control system of filter press.

Below in conjunction with drawings and embodiments the utility model is further described.

Description of drawings

Fig. 1 is the control principle block diagram of the utility model rotation filter press intelligence controlling device.

Fig. 2 is the structural representation of the utility model rotation filter press intelligence controlling device.

Fig. 3 is the module catenation principle figure of the utility model rotation filter press intelligence controlling device.

Among the figure 1, main motor, 2, filter, 20, the fluidization filter cake, 21, mechanically-sealing apparatus, 22, first order filter chamber, 23, middle filter chamber, 24, back level filter chamber, 25, sealing fluid, 26, pool of suspension, 27, reservoir, 28, cleaning solution, 29, filtrate, 3, sensor, 31, current sensor, 32, pressure sensor A, 33, pressure sensor B, 34, temperature sensor, 35, the solute concentration sensor, 36, the flow of filtrate sensor, 4, by-pass valve control, 41, grouping washing magnetic valve, 42, grouping filtrate magnetic valve, 43, discharge valve, 44, the filtrate main valve, 45, the sealing liquid valve, 46, backwash valve, 47, back one-level filtrate valve, 48, the work by-passing valve, 49, the start by-passing valve, 5, pump, 51, underflow pump, 52, force (forcing) pump, 6, programmable logic controller (PLC), 61, the PLC module, 62, the EM235 module, 7, supervisory control comuter, 8, frequency converter, 81, warning device, 9, servomotor.

The specific embodiment

Referring to accompanying drawing, a kind of rotation filter press intelligence controlling device, it mainly comprises main motor 1, is connected in the filter 2 of main motor 1; Be connected in sensor 3, by-pass valve control 4 and pump 5 on the filter 2; Pump 5 comprises underflow pump 51 and force (forcing) pump 52; Filter 2 comprises the mechanically-sealing apparatus 21 that is connected in main motor 1, is connected in first order filter chamber 22, middle filter chamber 23 and the back level filter chamber 24 of mechanically-sealing apparatus 21; Be connected in the sensor 3 on the filter 2, sensor 3 comprises the pressure sensor B33 of the current sensor 31 that is connected in main motor 1, the pressure sensor A32 that is connected in mechanically-sealing apparatus 21, first order filter chamber 22, is connected in temperature sensor 34 and the solute concentration sensor 35 and the flow of filtrate sensor 36 of back level filter chamber 24; The by-pass valve control 4 that is connected on the filter 2 comprises grouping washing magnetic valve 41, grouping filtrate magnetic valve 42, discharge valve 43, filtrate main valve 44, sealing liquid valve 45, backwash valve 46, back one-level filtrate valve 47, work by-passing valve 48 and start by-passing valve 49; The front of discharge valve 43 is provided with servomotor 9; Suspension pumps into dynamic filtration the filter 2 by underflow pump 51 from pool of

suspension

26,29 of filtrates flow into reservoir 27 by grouping filtrate magnetic valve 42, flow of filtrate sensor 36, filtrate main valve 44, and the solid formation in the suspension is then discharged by discharge valve 43 from back level filter chamber 24 by becoming fluidization filter cake 20 after at different levels the concentrating; Sealing fluid 25 is squeezed into mechanically-sealing apparatus 21 to guarantee its sealing by force (forcing) pump 52 by sealing liquid valve 45; Cleaning solution 28 needs the material of washing to wash by 41 pairs of grouping washing magnetic valves; The programmable logic controller (PLC) 6 and the supervisory control comuter 7 that are connected in sensor 3 link to each other with frequency converter 8, warning device 81 simultaneously; Programmable logic controller (PLC) 6 comprises PLC module 61 and EM235 module 62.

In conjunction with the accompanying drawings, the operate as normal of the utility model rotation filter press intelligence controlling device is:

Underflow pump 51 pumps into from pool of suspension 26 suspension and carries out dynamic filtration in the filter 2 by pipeline.Force (forcing) pump 52 pumps into sealing fluid 25 in mechanically-sealing apparatus 21 chambeies on the filter 2 by pipeline.Pool of suspension 26 and reservoir 27 are positioned at the bottom of whole rotation filter press filter 2.Cleaning solution 28 is equipped with the grouping washing magnetic valve 41 effective solute concentrations that dilute in the filter chambers that quantity does not wait by filter 2 tops, controls the unlatching number of the washing magnetic valve 41 that divides into groups after the concentration of solute send programmable logic controller (PLC) 6 to calculate by the solute concentration sensor 35 on the level filter chamber 24 after being located at; Filtrate 29 is equipped with grouping filtrate magnetic valve 42 and the flow of filtrate sensor 36 that quantity do not wait by its underpart and is entered reservoir 27; Solid formation in the suspension is then held back by the filter medium of the filter chambers at different levels on the filter 2, makes containing of filter chambers at different levels solid concentration more and more higher, and in the end the solid concentration that contains on the one-level filter chamber 24 reaches the highest, becomes fluidization filter cake 20; The solid concentration that contains of fluidization filter cake 20 is controlled by the discharge valve 43 that is arranged on the level filter chamber 24 of back; The power that contains solid concentration and main motor 1 of fluidization filter cake 20 is closely related, measure the electric current that rotates on the filter press master motor 1 by current sensor 31, become to deliver to and send servomotor 9 control discharge valves 43 after programmable logic controller (PLC) 6 calculates by fuzzy control program, control the open degree of its discharge valve 43 in real time.

Pressure sensor A32 and pressure sensor B33 calculate in mechanically-sealing apparatus 21 chambeies with first order filter chamber 22 chambeies in pressure difference, and control it in certain safe range, to guarantee that suspension particle does not enter seal face, warning device 81 sends alarm signal when exceeding pressure limit.

Increase frequency converter 8 on main motor 1, according to the material properties situation, control frequency converter 8 is worked under the frequency of setting.

The temperature rise duty of rotation filter press, the temperature value of measuring afterbody filter chamber 24 with temperature sensor 34 send programmable logic controller (PLC) 6 computational analysis and send supervisory control comuter 7 demonstrations and write down the temperature of its work.On filtrate 28 house stewards of this external filter 2 flow of filtrate sensor 36 is housed, in servicely, its amount of filtrate enters backwash process 25% the time in that device is normal when descending, the switch and the switches set number of programmable logic controller (PLC) 6 control grouping filtrate magnetic valves 42, the filter chamber medium is effectively cleaned, make it recover original filter efficiency.In addition, underflow pump 51 and force (forcing) pump 52, work by-passing valve 48, start by-passing valve 49 also can carry out programme-control by programmable logic controller (PLC) 6, also can manually control simultaneously.

Accompanying drawing 3 has shown the control connection relation of rotation filter press intelligence controlling device.The input of programmable logic controller (PLC) 6 is provided with the current sensor 31 that is connected in main motor 1 and is installed in temperature sensor 34, solute concentration sensor 35, the flow quantity sensor 36 that is equipped with on pressure sensor A32, the pressure sensor B33 in first order filter chamber 22 chambeies in mechanically-sealing apparatus 21 chambeies on the filter 2, the afterbody filter chamber 24; and various switch blocks; the monitoring switching part, the overload protection parts.The output that is connected in programmable logic controller (PLC) 6 has: the servomotor 9, warning device 81 of the frequency converter 8 on the main motor 1, control discharge valve 43, grouping washing magnetic valve 41, grouping filtrate magnetic valve 42, and other relays, run indicator.Programmable logic controller (PLC) 6 also links to each other with supervisory control comuter 7.

Below only be preferred embodiment of the present utility model, according to above-mentioned design of the present utility model, those skilled in the art also can make various modifications and conversion to this.For example, the modification and the conversion of syndetons such as main motor, filter, sensor, by-pass valve control, pump, programmable logic controller (PLC), frequency converter, servomotor.Yet similar this conversion and modification all belong to essence of the present utility model.

Claims

1, a kind of rotation filter press intelligence controlling device, it is characterized in that it mainly comprises main motor (1), be connected in the filter (2) of main motor (1), be connected in sensor (3), by-pass valve control (4) and pump (5) on the filter (2), be connected in the programmable logic controller (PLC) (6) and the supervisory control comuter (7) of sensor (3), the frequency converter (8) that is connected in programmable logic controller (PLC) (6) is connected with by-pass valve control (4) with main motor (1) respectively with servomotor (9).

2, rotation filter press intelligence controlling device according to claim 1, it is characterized in that filter (2) comprises the mechanically-sealing apparatus (21) that is connected in main motor (1), be connected in the first order filter chamber (22) of mechanically-sealing apparatus (21), middle filter chamber (23) and back level filter chamber (24).

3, rotation filter press intelligence controlling device according to claim 1, it is characterized in that sensor (3) comprises the pressure sensor B (33) of the current sensor (31) that is connected in main motor (1), the pressure sensor A (32) that is connected in mechanically-sealing apparatus (21), first order filter chamber, be connected in temperature sensor (34) and the solute concentration sensor (35) and the flow of filtrate sensor (36) of back level filter chamber (24).

4, rotation filter press intelligence controlling device according to claim 1, it is characterized in that by-pass valve control (4) comprises the grouping washing magnetic valve (41) that is connected in filter (2) top, be connected in the grouping filtrate magnetic valve (42) of filter (2) bottom and be connected in the discharge valve (43) and the filtrate main valve (44) at filter (2) rear portion.

5, rotation filter press intelligence controlling device according to claim 4 is characterized in that the front of discharge valve (43) is provided with servomotor (9).

6, rotation filter press intelligence controlling device according to claim 1 is characterized in that programmable logic controller (PLC) (6) comprises PLC module (61) and EM235 module (62).