RU89418U1 - TECHNICAL CARBON DISPERSION DEVICE - Google Patents

Abstract

1. A device for dispensing a dispersion of carbon black in process water, comprising a mixing device equipped with a stirrer and a metering pump, characterized in that the mixing device is connected in series with a mixing pump and a metering pump connected to the process water circulation pump, and to the mixing the pump is additionally connected to a colloidal mill installed in the metering tank of the mixing device. ! 2. The device for dispensing dispersed substances according to claim 1, characterized in that it is additionally equipped with a hydrodynamic mixer installed in the bypass to the circulation pump, while the metering pump is connected to the input of the hydrodynamic mixer.

Description

The utility model relates to the field of preparation of high-quality dispersions for dosing in small quantities into technological waters for various purposes, for example, to slow down corrosion, reduce the formation of deposits on metal surfaces, the efficiency of a cutting tool, absorption of thermal neutrons, etc.

To obtain dispersions for various purposes, various devices are widely used in industry, in particular, mixers (see A.S. N 385608, No. 394074), which are simple to manufacture, maintain, and have a low cost, but they do not allow to obtain high-quality dispersions, as the particles of the dispersed phase have a size of the order of 10 20 μm or more, at the same time, it is known that the stability and efficiency of use of the dispersion increases with increasing particle size.

To clean the process water, dry additives are introduced, for example carbon black, which is preliminarily prepared in the form of a dispersion in a tank with a stirrer. To improve the quality of mixing, an additional mixing pump is used. The dispersion of the additive is metered into the process water using a metering pump. (Shkrob M.S. and Prokhorov F.G. Water treatment and water regime of steam-turbine power plants. - M.: Yusenergoizdat, 1961).

The objective of the utility model is to create a device for dispensing dispersed carbon into process water as an additive to reduce metal corrosion.

The technical effect is to obtain a high-quality dispersion to ensure better mixing of the additive with the process water and more reliable operation of the metering pump when introduced to a point with lower pressure.

The carbon black dispersion metering device comprises a mixing device equipped with a stirrer and a mixing pump, which is connected in series with a metering pump connected to a circulation pump. A colloidal mill is additionally connected to the mixing pump, which is installed in the tank of the dispenser of the mixing device.

In some cases, for more efficient mixing of the prepared dispersion with process water and its more complete dispersion in process water, it is advisable to introduce it using a hydrodynamic mixer. In this case, the device may additionally be equipped with a hydrodynamic mixer. To create the required pressure drop, a hydrodynamic mixer is connected to the circulation pump of the process water bypass in such a way that part of the process water flow from the pump head enters the mixer and returns to the pump inlet, and the dispersed additive is introduced into the mixer inlet using the metering pump, connecting the metering pump to hydrodynamic mixer inlet.

Figure 1 schematically shows a device for dispensing dispersed substances prepared from initially dry carbon black, which consists of a dispenser tank 1 of a mixing device, a dispenser pump 2, a mixer 4, a mixing pump 5, a valve 6, a colloid mill 7 connected to a mixing pump 5 and the circulation pump of process water 3. The device operates as follows.

The dispenser tank 1 is filled with water and the required amount of dry matter, namely carbon black, is filled up. Include a mixer 4, which holds coarse particles in suspension. Then, a mixing pump 5 is turned on, which feeds the suspension of coarse particles into the colloidal mill 7. In the mill 7, the coarsely dispersed particles are destroyed due to the high tangential stresses generated in the gap between the coaxial cones, one of which rotates at a sufficient speed. The resulting finely dispersed system is discharged back into the tank 1. After there are no coarsely dispersed particles remaining in the tank 1, open the valve 6 and turn on the metering pump 2, which is connected to the process water circulation pump 3.

Fig. 2 shows a device where a hydrodynamic mixer 8 is connected in a bypass to the process water circulating pump 3 so that a part of the process water flow from the pump 3 pressure flows into the mixer 8 and returns to the pump inlet 3, and the dispersed additive is introduced using the metering pump 2 at the entrance of the hydrodynamic mixer 8.

As a hydrodynamic mixer 8 can be used mixer [Gershgal D.A. and Friedman V.M. Ultrasonic technological equipment. - M.: Energy, 1976, p.].

Claims (2)

1. A device for dispensing a dispersion of carbon black in process water, comprising a mixing device equipped with a stirrer and a metering pump, characterized in that the mixing device is connected in series with a mixing pump and a metering pump connected to the process water circulation pump, and to the mixing the pump is additionally connected to a colloidal mill installed in the metering tank of the mixing device. 2. The device for dispensing dispersed substances according to claim 1, characterized in that it is additionally equipped with a hydrodynamic mixer installed in the bypass to the circulation pump, while the metering pump is connected to the input of the hydrodynamic mixer.