SU1688231A1 - Suspension flow regulator - Google Patents

Abstract

The invention relates to the automatic dosing of suspensions, pulp and liquid aggressive contaminants of mixtures and can be used in the chemical industry and the production of mineral fertilizers. The purpose of the invention is to improve the accuracy of flow control in the extended range. For this, a device for controlling the flow of suspensions

Description

The invention relates to the automatic dosing of suspensions, pulps and liquid aggressive contaminated mixtures and can be used in the chemical industry and the production of mineral fertilizers for automatic control of the consumption of acids, alkalis and suspensions, | The purpose of the invention is to improve the accuracy of flow control in an extended range.

The drawing shows the functional diagram of the device.

The device for regulating the flow of suspensions comprises a housing 1 with an inlet pipe 2 and an internal partition 3 dividing it into two symmetrical parts, organs 4.5 i preliminary adjusting the flow of the suspension, used in forming a slit nozzle and installed in the inlet The nozzle 2, In each part of the device, the inclined 1 plate 6.7 and the inclined guide tray 8.9 are installed. The baffle plate system - an inclined tray forms the second step of forming the slurry flow,

In the lower part of the body, opposite to inclined chutes 8.9, load-bearing plates Yu, 11 are installed, connected by a mechanical drive 12.13 (bellows, torque-free suspension arms and levers) with electric power converters 14.15, and the outlet 16 is located , To control the flow of the suspension, the signals from the converters 14, 15 are summed by a controller 17 which is connected to the actuator 18 of the regulator 19. The geometrical characteristics and the basic relationships between the individual structural elements remain the same like the prototype.

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The device works as follows, w

The suspension under pressure is fed into the inlet 2, Since the device is symmetrical, the flow is divided into approximately two equal parts. In the future, we consider only the work of the right half of the device, the work of the left half is similar. Through a slit nozzle, the pre-adjustment unit 4 (in the form of a slit nozzle) slurry enters the device body. The size of the nozzle is chosen depending on the flow of the suspension and the pressure in the inlet nozzle 2, thus regulating its supply and pre-shaping the flow. The final formation of the steady flow is carried out using the baffle plate 6 and the inclined chute 8. along which flows into the lower part of the body in the outlet nipple 16. The flow of the suspension exerts pressure on the force-measuring plate 10, The pressure of the flow of the suspension is proportional to its value expense. The force developed by the incident flow on the measuring plate 10 is transmitted through a mechanical drive 12, 13 to a standard electric power converter 15, which converts the oscillations of the load plate 10 into a DC signal. Each slurry flow rate passing through ygrpoftcTBo corresponds to a certain value of the output current of the converter 15, which is connected to the regulator t7, tia the regulator input 17 also receives a DC signal and from the converter 15. The regulator 17 sums these signals and controls the actuator 18 of the regulatory body 19 connected to the inlet 2 of the regulating device, thereby maintaining

at a given level, the value of the flow of the suspension,

In the proposed device for controlling the flow rate of the suspension, the dosing accuracy in regulating the supply of contaminated acid is 4–1% at a flow rate of up to 80 t / h, since the total flow is distributed into two parts, in each of which an additional step of forming a flow is introduced. The regulation of the current value of the flow of the suspension is carried out automatically.

In addition, using the proposed device, it is possible to simultaneously dispense two suspensions, maintaining a predetermined ratio between their costs. In this case, a homogeneous mixture of these components is formed already at the output of the proposed device, and not in the technological apparatus, which contributes to the intensification of technological processes. To realize this possibility, the initial suspensions are fed to the inlet of the device on opposite sides of the partition,

Claims (1)

Invention Formula A device for controlling the flow of suspensions, comprising a housing with an inlet pipe and an internal partition dividing it into two bunkers for receiving the overdose suspension and forming two suspension streams, equipped with an outlet pipe, the first organs of the preliminary 0 five 0 five 0 five placed in the first bunker and made in the form of an inclined breaker plate, an inclined chute and a load plate, arranged in series along the first stream of suspension, connected through a first mechanical drive to the first electric power converter, the output of which is connected to the first summing input of the controller connected to the output the actuator associated with the regulator, wherein the angle of inclination of the tray is 50-80 °, the ratio of the angle of inclination of the baffle plate to the angle of inclination of the tray is 1.00-0.37, and the ratio of the output section of the bunker of the dosed suspension to the input section of its outlet nozzle is 0.6-0.9, characterized in that, in order to increase the control accuracy in the extended range, it is entered sequentially the second mechanical drive and the second electric power converter connected by the output to the second summing input of the regulator are connected, and the second bunker for receiving the dosed suspension is supplied with the second bodies symmetrically placed relative to the first bodies controlling the supply of the slurry and second slurry flow transducer in an alternating, current signal, located downstream of the second flow, wherein the inlet and the housing is located in one plane, the inner partition mounted on adjusting the supply of suspension, the axis of symmetry of the housing and the inlet in the form of a slit nozzle, and chopping; the angle between the axes of the organs is the first converter of the flow of the suspension into the alternating current signal; felling, the angle between the axes of the organs Actual adjustment of the supply of dyc-compensation is 70-90.