SU1500704A2 - Apparatus for treating suspensions - Google Patents

Description

The invention relates to equipment for construction production, namely, apparatus for processing suspensions, and allows to intensify the mixing process. In the apparatus

The invention relates to equipment for construction production, namely, apparatus for processing suspensions, and is additional to auth.St. No. 922213.

The aim of the invention is to intensify the process of mixing.

The drawing shows an apparatus for processing suspensions.

The apparatus contains a confuser 1, a cylindrical flow area 2, in which at least one cascade of nozzles 3 are installed, a diffuser 4, a supply pipe 5. Part of the pipe 5 placed outside the cylindrical flow section 2 is equipped with a pulsator 6. The cascade of nozzles 3 contains several nozzles, for example, three nozzles 7-9, provided with shut-off devices2

for processing suspensions nozzles are equipped with individual locking devices with actuators that are connected to the corresponding relays, some of the inputs of which are connected to the corresponding setting devices, and the other inputs are connected to the regulator output, the first input of which is connected to the output of the first subtraction unit, the inputs of which are connected to a pressure sensor in the fluid supply line and the nozzle - to the pressure sensor installed in the apparatus in front of the nozzles, and the second input - with the output of the second subtraction unit, the inputs of which are connected to the sensor and Occupancy viscous bone. 1 dw., 2 tab.

roystvami, made in the form of conical rods 10-12, connected with bellows 13-15, placed in the housing 16-18.

The internal cavity of the housing 16 is connected to the output of the relay 19, one of the inputs of which is connected to the setting device 20, and the second to the regulator 21. The internal cavity of the housing 17 is connected to the output of the relay 22, the inputs of which are connected to the output of the controller 21 and the output of the setting 23. The internal cavity the housing 18 is connected to the output of the relay 24, the inputs of which are connected to the output of the regulator 21 and to the output of the setpoint 25.

The sensor 26 of the fluid pressure through the regulator 27 is connected to the actuator 28, installed8Ц,., 1500704

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on the fluid supply line to the nozzle cascade.

One of the inputs of the regulator 21 is connected to the subtraction unit 29, the inputs of which are connected to the pressure sensor 30 in the flow section and the pressure sensor 26 in the nozzle cascade.

The second input of the regulator 21 is connected to the output of the subtraction unit 31, one 10 of the inputs of which is connected to the viscosity sensor 32, and the other to the ’master 33.

The apparatus for processing suspensions works as follows. 15

The suspension flow from confuser 1, which increases the speed of transportation of the liquid, enters the flow section 2, where the liquid flows to the oncoming jet of liquid, which 20 flows through the inlet pipe.

5 and is ejected from the nozzle cascade 3.

As a result of the interaction of the fluid flow in the flow area with a liquid stream flowing from 25 nozzles 7-9 over the cross section of the flow area, cavities are formed, filled with vapor bubbles of the boiling liquid, which, when closed, create zones of micro-30 cooling of the bubbles, generating an intense pressure field and high-speed cumulative dispersing effects on the suspension.

When two oppositely directed 35 fluid flows are applied, the relative speed of the layers of interacting liquids increases, which leads to a decrease in pressure at the interface line. .40 When a pressure equal to the pressure of saturated vapor is reached, the liquid boils and a mic is formed. steam bubbles filled with steam. After passing through the flow section in diff-45 Fusor 4 ", bubbles collapse with the formation of cumulative microstructures with a speed of the order of K ^ m / s and a shock pressure of up to 10 ⁵ atm. The resulting microjet penetrate the layers of liquid and provide intensive mixing.

The intensity of cavitation mixing is determined by the size of the cavity filled with bubbles of vapor of a liquid. The parameter characterizing the amount of mechanical impurities in technical carbon is coke number. The lower it is, the

less mechanical impurities in technical carbon. It is necessary to maintain such a mixing intensity so that the coke number of the raw material is minimal. Therefore, the viscosity of the raw material is taken as the parameter determining the coke number

When the quality parameter at the output of the apparatus changes, the subtraction unit 31 generates a signal corresponding to the difference of values

Λ l /

The signal proportional to this difference enters the regulator 21, the signal from which is fed to the inputs of the relay 19, 22, 24, where it is compared with the corresponding setpoint pressures of setters 20, 23, 25. When the setpoint pressure is exceeded, the corresponding relays open and issue a command to the corresponding bellows on closing of the nozzles, while in open nozzles the flow rate increases, which ensures the growth of the dimensions. corners and, as a consequence, an increase in the intensity of mixing.

The influence of cavern size on the quality indicator is established, which is the viscosity characterizing colloidal stability.

The raw materials for carbon black at 60 ° C were taken as working fluids.

The test results are shown in table 1.

From the test results it follows, ⁴ that the size of the cavity depends on the number of open nozzles.

Table 2 shows the viscosity at the outlet of the apparatus, depending on the number of open nozzles, all other conditions being equal.

The operation of the regulator 21 is corrected by the pressure difference in the flow section and in the fluid supply line to the manifold, calculated by subtraction unit 29, the output of which is connected to the regulator input 21. This correction consists in determining the number of open nozzles depending on the differential pressure value calculated by block 29 .

Increasing the number of nozzles more

3x's provides a smooth control of the intensity of mixing.

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The regulator 27 through the actuator 28 stabilizes the pressure at a given level of fluid entering the pipe 5.

The proposed solution allows to improve the quality of raw materials for carbon black, which allows to improve the wear resistance of rubber products.

Claims (1)

Claim Apparatus for processing suspensions auth.St. No. 922213, characterized in that, in order to intensify the process of mixing, the nozzles are additionally equipped with shut-off devices with actuators connected to a control system containing a fluid pressure stabilization circuit consisting of a pressure sensor connected through a regulator to an actuator on the leagues fluid supply to the nozzles, and the nozzle closing control loop, consisting of a regulator, pneumorele $ with setting devices, pressure sensor, installed in the apparatus in front of the nozzles, viscosity sensor installed in the apparatus after the nozzles, two subtraction units and a viscosity setting unit, with the actuators of the locking devices connected to the corresponding pneumorel, one of the inputs of which are connected to the corresponding setting devices, and the other inputs to the output , 5 regulator, the first input of which is connected to the output of the first subtraction unit, the inputs of which are connected to the pressure sensor in the fluid supply line and the nozzle to the pressure sensor 20 installed in the device in front of the nozzles, and the second input - from output of the second subtraction unit, the inputs of which are connected to the sensor and viscosity adjuster. Table 1 Options _t - _t ~ - 2 · 3 Cavern length, mm Nozzle positions More 1,100 500 150 7 Close Open Opened eight Open - ⁿ - - 9 Close Close Close Parameter R-- table 2 R P ~ “ Viscosity at 100 ° C, cSt Position of nozzles 21.7 10.8 14.9 7 Close Open Open eight Open Open Open 9 Resistance to consideration Close Close Close rhenium persists, day 2 More than 21 7 Coke number . 14 2.1 7,8 1500704