SU1567258A1 - Method of mixing and treating liquid-phase system - Google Patents

Abstract

The invention relates to methods for mixing and processing liquid phase systems and allows for increasing the processing efficiency of the mixture as well as reducing the energy intensity of the process. According to the method, the fluid flow is pre-divided into two parts, most of which are directed to the mixing chamber. A smaller part of the flow is directed to a hydroacoustic emitter with interacting stationary vortex flows. In this case, the reagent is ejected alternately with doses into the region of resolution of each of the vortex flows. Then both parts of the stream are mixed in the chamber. 1 hp f-ly, 1 ill.

Description

one

(21) 4334387 / 23-26

(22) 11/02/87

(46) 05.30.90. Bul Number 20

(71) Scientific design and technical association Belstroynauka Gosstro BSSR

(72) M.V. Shpak, M.N.Dubrovin, R.G.Sarukhanov, S.V. Khramenkov, A.V.Malevich and G.D.Tru'an

(53) 66.063 (088.8)

(56) Author's testimony of the USSR W 507343, cl. At 01 F 11/02, 197h.

(54) METHOD FOR DETERMINING AND PROCESSING OF PHROMEDICALLY-PHASE SYSTEMS

(57) The invention relates to methods.

mixing and processing of liquid-phase systems and allows to increase the processing efficiency of the mixture, as well as reduce the energy intensity of the process. According to the method, the fluid flow is pre-divided into two parts, most of which are directed to the mixing chamber. A smaller part of the flow is directed to a hydroacoustic emitter with interacting stationary vortex flows. In this case, the reagent is ejected alternately with doses into the region of resolution of each of the vortex flows. Then both clean streams are mixed in the chamber. 1 hp f-ly, 1 ill.

The invention relates to obtained by mixing mixtures and solutions of gas-liquid, liquid-liquid, solid-liquid systems and can be used in the construction, mining, metallurgical, engineering, chemical, food and other industries.

The purpose of the invention is to reduce the energy intensity of the process.

The drawing shows a pipeline for implementing the method.

Pipeline 1 is designed to supply a source of fluid flow to the mixing chamber 2. Pipeline 1. communicated with the outlet 3, which is a smaller diameter pipe for supplying a smaller part of the source liquid flow through the pump 4 to the hydroacoustic emitter 5. Inlets of the hydroacoustic emitter 5 are connected to the inlet area 6. The vacuum areas are located in the center of the vortex chambers 7 of the acoustic emitter 5. Inputs 6 are interconnected by means of a bottom alternately feeding 8 reagents. The alternate feed mechanism 8 is sealed from the reagent tank 9.

When processing reagents of large volumes of liquid, it is energetically impractical to pump all the liquid through the sonar 5. It is enough to pass through the radiator 5 a smaller part of the fluid flow through the outlet 3. The value of this part of the vein is determined by the necessary amount of reagent and the ejection properties of the hydroacoustic radiator. As a result of the impact of elastic kg-vibrations of the ultrasonic range. cavitation in radiator 5 occurs

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Processing a smaller part of the fluid flow to achieve the desired effect — dispersing, dissolving, or activating the reagent. In this case, the reagent is ejected alternately with doses into the vacuum area of each of the stationary vortex flows. Then, the resulting emulsion, suspension or solution is quite effectively mixed with a larger | part of the fluid flow in the mixing chamber 2.

Installation in the mixing chamber 2 additional mixing devices energetically disadvantageous. Therefore, according to the invention, the supply of the reagent is carried out by dosing it by means of a mechanism of alternate supply to the vacuum area of each of the stationary vortex flows, 2 which are formed in the hydroacoustic emitter. The supply of the reagent to one of them causes a decrease in the vacuum in it, a reduction in the size of the vortex and, as a result, a deviation of the flow to its 2 side. Alternately, the periodic dosage of the reagent in each of the stationary vortices in the hydroacoustic emitter causes a periodic change in the direction of the flow of the treated liquid jet with the reagent into the mixing chamber 2, in which the emitter is installed. As a result, without additional energy costs, efficient mixing of the liquid stream with the reagent is ensured with the greater part of the liquid stream flowing directly into the mixing chamber 2.

The frequency of the supply of the reagent is determined by the time of complete deviation of the jet, depending on its inertia. The time of complete deflection of the jet is determined experimentally for a given jet velocity and its volumetric flow rate by visual observations when the reagent supply channel is opened and closed.

To increase

four

3

the mixing efficiency of the liquid in

chamber 2 main and processed streams, it is advisable to direct towards each other.

Example. Upon receipt of plasticized activated water plants, l, directly introduced into the scent of the total water flow with an intelligent chamber with a volume of 1 2 m3, where

The flow rate of 50 l / min is separated and the main part of the flow is separated, a part of the flow with volumetric flow. The emitters are dosed out by ejection of 8 l / min, which is processed into an aqueous solution of coagulant Ali (S0413 s

d

0 5 Q. - a roacoustic emitter with a slotted nozzle of 1x8 mm and two cylindrical resonant chambers to form stationary vortex flows, the axis of which is parallel to the direction of the nozzle slit. The diameter of the cameras is 8 mm. The acoustic field is created as a result of the interaction between the vortex flows intermittently overlapping the flow of the central jet. The reagent SDB-sulphite-yeast brew (TU 81-04-225-73 or OST 81-79-74) in the form of a 50% solution is ejected out of the emitter, and alternately switching the supply of reagent to one or another vortex is provided. the camera. The reagent feed time is 0.5 s. As a result, the additive is activated and mixed with the water stream. Volumetric flow rate of the ejected solution is 0.8 l / min. The treated stream is mixed with the main part of the water stream in a 200 L mixing chamber. An ultrasonic frequency pulsating jet from an emitter performs an oscillatory change in the direction of flow in a mixing chamber with a frequency of 1 Hz, which ensures efficient mixing of the treated part of the flow with the bulk of the liquid.

The concrete prepared by the prepared activated working solution of the additive BD of 0.4-0.5% concentration is directly shut. The surfactants activated by the ultrasonic field eliminate the sticking of individual cement particles, reduce friction between them and slow down the process of hardening of the cement stone in concrete. As a result, the cement consumption is reduced, the plasticizing effect is increased, the technological properties of concrete are improved, and cracking in it is prevented.

During the purification of drinking water at the water treatment plant, suspended particles are removed from the total flow with a volumetric flow rate of 10,000 m3 / h and a part of the flow is taken with a volumetric flow rate of 60 me / h, which is pumped through four radiators connected in parallel

0

volume flow rate 4 m3 / h. The emitters have a general scheme of construction, similar to that described above. The size of the slotted nozzle is 1.5x80 mm, the diameter of the resonant chambers is 30 mm. The reagent is fed into the vortex chamber for 1 s.

Processing in the ultrasonic field hydroacoustic coagulant emitters and mixing with water by the proposed method allows to reduce its consumption by 20-30% and reduce the size of settling facilities by accelerating the sedimentation of the suspension. Compared with the known methods, the energy efficiency will be higher proportionally to the ratio of the volume flow rates.

The proposed method showed the possibility of reducing the energy intensity of the ultrasonic treatment process on average

10-20 times.

Claims (2)

1. A method of mixing and processing liquid-phase systems, including the effect on the fluid flow in a mixture with a reagent by elastic vibrations of the ultrasonic range created by a sonar emitter during ejection of reagent into it, characterized in that, in order to increase the efficiency of processing the mixture and reduce energy intensity - air flow, the fluid flow is preliminarily divided into two parts, most of which are directed into the mixing chamber, and the smaller - into the hydroacoustic emitter with interacting stationary ihrevymi streams, wherein the reagent is ejected alternately to vacuum doses of each stationary vortex flows, and then the two parts are mixed in the flow mixer of 0 camera. 2. A method according to claim 1, characterized in that part of the stream is supplied to the mixing chamber one another.