SU1220700A1 - Method of controlling sedimentation centrifuge of periodic action - Google Patents

Description

 one

The invention relates to apparatus for separating suspensions in the field — centrifugal forces, namely, batch centrifuges, and may find application in the field of livestock wastewater treatment, in the chemical, food and other industries.

The aim of the invention is to increase the productivity of the centrifuge.

The essence of the method for controlling a batch centrifuge of a periodic action is as follows.

The centrifuge's nominal capacity is calculated based on the requirement that the suspension be thoroughly cleaned when the centrifuge rotor is full of grease. However, given that the throat space is gradually filling up, the centrifuge capacity can be increased by controlling the feed of the slurry to the separation, depending on the degree of filling of the throat space. To do this, measure the speed of the suspension relative to the rotor at the point of the rotor outside the mud space and the consumption of the suspension. Based on the measured values, the degree of filling of the gaseous space is calculated and, based on the results of the calculations, the amount of slurry applied to the separation is controlled.

FIG. 1 shows a batch centrifuge; in fig. 2 is a section A-A in FIG. 1, in FIG. 3 - section bb on f ug. one.

The centrifuge includes a rotor 1 mounted rotatably in housing 2 and provided with a drive shaft 3, feeding pipe 4 for feeding slurry into the rotor cavity, windows 5 of the rotor 1 and windows 6 of housing 2 for withdrawing the centrifuge. On the housing 2 there are brackets 7, on which the support 8 of the axis 9 is mounted. On the latter, a ring 10 is mounted for rotation, carrying half axles 11 on which two shoulders are mounted levers 12 and 13. The lever 12 carries the sensitive element 14 of the speed sensor, and Pin 13 - equilibrium 1 load 15. Element 14 and load 15 are located at a distance R from the rotor axis equal to the radius of the centrifuge. Both bars of the lever 12 have cavities 16 through which they pass to the conductor element 14. On the axis is installed

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with the possibility of axial movement and rotation around the axis of the support ring 17, bearing the contact rings 18. To the support ring 17 are attached

5 rigid bars 19 and 20, connected by their other ends with levers 12 and 13, respectively. Tough hectare 19 also carries the continuation of conductors passing through the cavity

to 16 to the sensitive element 14. Further, these conductors t through the cavity 21 in the support ring 17 to the rings 18. The support ring interacts with a plug 22 mounted on the bracket 7 with the ability to move along the bracket. The movement of the fork 22 is limited by the stops 23 and 24. The slip rings 18 interact with the sliding

20 pins 25, the conductors from which go to the input of the secondary meter 26 of the speed of the centrate. The output of the latter is associated with the input of the command unit 27, the output of which is in its

25 is connected to the input of a controllable valve 28 installed on the supply pipe 4. The latter also has a flow meter 29, the output of which is connected to the input of the command valve

block 27.

The centrifuge works as follows.

The rotor 1 is driven to rotate. The fork 22 is lowered along the bracket 7 until the levers 12 and 13 come into contact with the rotor 1 (shown in this position in FIG. 1). In this case, the levers are involved in rotation together with the rotor and engage the ring 10 in rotation, and through the rigid m r 19 and 20 also the ring 17. The free rotation of the rings 10 and 17 is ensured by their installation on bearings. 17 with a fork

22 through the bearing. The suspension in the rotor 1 is fed through a pit-tube pipe 4 and forms a bone ring in the rotor cavity. Upon reaching the boundary of the window 5 (radius of the centrifuge), the centrifugal discharge begins to flow through these windows and an axial movement of the suspension is established in the rotor. At the same time, a signal from the flow meter 29 arrives at the input of the command unit 27. Both of these signals are processed in the command unit 27, and the processing result is fed to a control valve 28 controlling the flow of the slurry into the centrifuge.

The feed rate of the suspension to the center of separation, which ensures the precipitation of particles of greater hydraulic size than some, is predetermined, with the centrifuge empty space 35% higher than with half 220,700

is a function of the centrifuge’s filled space, and is a function of the centrifuge’s filled space. According to the proposed method, the degree of filling of the centrifuge centrifugal space is determined and the feed rate of the suspension in the centrifuge is controlled, which makes it possible to increase productivity by 15-20%.

12

P

13

F (/ r. 6-B

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2S

VNII1SH. Order 1511/7

Branch PS, Patent, Uzhgorod, st. Design. four

Fik.Z

 Circulation 517

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Claims (1)

METHOD FOR CONTROLLING A CLEARING CENTRIFUGAL PERIODIC ACTION, which involves regulating the amount of suspension supplied to the separation depending on its flow rate, characterized in that, in order to increase productivity, measure the speed of the suspension relative to the rotor at the rotor point outside the mud space of the centrifuge, and controlling the amount of suspension supplied to the separation carried out taking into account the measured parameter. SU .. „1220700