SU1755055A1 - Device for batching and mixing two liquids - Google Patents

Abstract

Use: for mixing liquids and dispensing one liquid to another in a power system and chemical industry. SUMMARY OF THE INVENTION: The device contains dispensing vessels for liquids which are made communicating. At least one of the vessels is formed with a generator, the shape of which repeats the curve corresponding to the change in consumption over time. At least one of the vessels is made in the form of a cone. Dosing vessels are connected by a pipeline at the outlet of which a pump is installed. 2 Il.

Description

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The invention relates to the field of mixing liquids, as well as the dosing of one liquid into another, in particular any reagent into water, according to various dependencies, for example, exponentially, and can be used in heat and power engineering, the chemical industry and other folk industries.

Agitators are known for preparing and metering reagents (coagulant, soda and milk of lime) into water. They comprise a tank-container and a metering pump connected to it with a feed and recycle line (the latter is intended for mixing the reagent). The reagent is pumped out of the housing by a dosing pump into a container or pipeline with water.

The disadvantage of the agitator is that it can only be used for uniformly dosing the reagent into water. If necessary,

a time varying dosage mixer is not applicable.

Closest to the present invention is the installation of the preparation and dosage of polyacrylamide in water, containing the following main components: a constant level tank, a gravity discharge pipe from it with a regulating valve. Polyacrylamide flows by gravity to the inlet of the ejector into which water is supplied; the dosage of polyacrylamide depends on the degree of opening of the valve.

Using this setup, it is possible to carry out a variable in time dosage of the reagent into water, including the realization of the exponential dependence of the supply of the reagent.

The disadvantage of the installation is the following: it is necessary to install a valve with a mechanized drive and a software device (specifying the dependence of the dosage on time or water flow); constipation

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The valve body must be made with a special profile; the range of dosage values in the installation is relatively small (due to the small stroke of the valve spindle and the lack of gearboxes with a sufficiently high gear ratio); dosage is possible only in a pipeline with water that is under vacuum (i.e. by suction of the reagent to the ejector), etc.

These installations are not reliable enough and require the use of special equipment.,

 The purpose of the invention is to improve the reliability of the dosage while simplifying the design of the device.

This goal is achieved by introducing a vessel for the second liquid into the device for dispensing, the vessels being made communicating and at least one of the vessels is made with a generator, the shape of which repeats the curve corresponding to the change in flow rate over time. In particular, at least one vessel is made in the form of a cone.

The device implements the principle of proportionality of lowering the levels of liquids in communicating vessels regardless of their form, i.e. By giving a certain shape to one of the containers, it is possible to realize any dependence of the dosage over time.

FIG. 1 shows a schematic of a device for dispensing a fluid according to time-dependent dependencies; in fig. 2 shows a variant of a device for dispensing a fluid in exponential time dependencies.

The devices contain a pump-down process pump 1, designed for pumping liquid and articulated through pipeline 2 with containers 3 and 4, designed to be filled with interlocking liquids. For the case when the metered liquid has a density greater than the density of the liquid into which the dosing is performed, the level of the first in the tank 4 will be correspondingly lower, as shown in FIG. one.

The device works as follows.

Prior to the start of the evacuating process pump, 1 the liquid columns in the tanks 3 and 4 are balanced. When turning on the suction pump 1 in the pipeline 2

liquids flow from tanks 3 and 4; the mixture mixed in pump 1 is pumped to its intended purpose. Due to the effect of the associated vessels, the level in the container 4 of the liquid to be dosed automatically tracks the level in the tank 3 of the liquid into which the dosing is performed. At the same time, from the container 3, the liquid is pumped out with approximately the same capacity, while the emptying of the container 4 of the liquid to be dosed takes place with a variable (descending from maximum to zero) flow rate due to the conical (or hyperbolic) form of this container.

The device layout is extremely simplified.

and allows for the implementation of various dosing dependencies on time, giving the appropriate forms of the capacity of the dosing liquid; perform dosing without the use of metering pumps, regulating valves of special individual performance, software devices; increase dosing reliability due to the extreme simplicity of the scheme.

The proposed device will be particularly effective when it is necessary to carry out dosages in a time-dependent relationship, for example, dependencies close to exponential.

Claims (1)

Claims An apparatus for metering and mixing two liquids, comprising a metering vessel for one liquid, connected to the second fluid supply pipeline, at the outlet of which a pump is installed, characterized in that, in order to improve reliability and simplify the design, a vessel for the second fluid is introduced into it, and the vessels are communicating, and at least one of the vessels is made generatrix, the shape of which repeats the curve corresponding to the change in flow rate of time. FIG. one 7 ---- rL-