RU192732U1 - INSTALLATION FOR PREPARATION OF COAGULANT SOLUTION - Google Patents

Abstract

The utility model relates to devices for preparing a working solution of a coagulant for purifying water from pollutants and can be used in the field of drinking water, industrial water supply in wastewater treatment. The technical result of the claimed utility model is to improve the quality of the resulting coagulant solution while maintaining high plant performance. The installation for preparing a coagulant solution contains a container, a pipeline for supplying water to the container, a pipe for withdrawing the finished coagulant solution, a pipe for supplying a substance to accelerate the dissolution of the coagulant, a mechanical stirrer, a filter installed on the pipeline for withdrawing the finished coagulant solution.

Description

The utility model relates to devices for preparing a working solution of a coagulant for purifying water from pollutants and can be used in the field of domestic, drinking, and technical water supply in wastewater treatment.

The prior art (patent of the Russian Federation No. 174132, 10/03/2017) known installation for the preparation of a coagulant solution, containing a container inside which there is a pipeline for supplying water, a system for selecting the finished solution, perforated pipes for supplying compressed air and steam associated with the compressed feed pipe air and steam. Inside, the container is divided into sections with covers, at the bottom of the container there is a removable mesh, under which perforated pipes are connected, connected to the compressed air and steam supply pipe.

The disadvantage of this analogue is the low productivity of the method for producing coagulant, which is caused, in particular, by the need to periodically stop the production of coagulant to clean the removable mesh from undissolved residues of raw materials; the inability to carry out the production process in the absence of the possibility of supplying compressed air and / or hot or heated water, or steam and / or the organization of the operation of the pumps.

As the closest analogue to the claimed utility model can be selected installation for the preparation of a coagulant solution, which contains a container divided into one or more sections, closing on top (Republic of Korea patent No. 101409735, 06/13/2014). The installation is equipped with a pipeline for supplying water, a system for selecting the finished solution, a pipeline for supplying a pressure head from a circulation pump for dissolving the coagulant (water injector). Each section of the tank is equipped with vertical mechanical mixers for mixing the coagulant solution, while the rotation of the mechanical mixers is carried out using motors.

The disadvantage of the closest analogue is the receipt of a product (coagulant) of low quality, due to the lack of installation of a device that ensures uniformity of the coagulant, the absence of contaminants (mechanical impurities, debris).

The technical problem to which the claimed utility model is directed is the development of an improved installation design devoid of the above disadvantages.

The technical result of the claimed utility model is to improve the quality of the resulting coagulant solution while maintaining high plant performance.

The specified technical result is achieved in the installation for the preparation of a coagulant solution, containing a container, a pipeline for supplying liquid to the container, a pipe for withdrawing the finished coagulant solution, a pipeline for supplying a substance to accelerate the dissolution of the coagulant, a mechanical stirrer, a filter installed on the pipeline for removing the finished coagulant solution.

The capacity of the installation can be divided into several sections. A plant may contain more than one mixer.

One or more mixers may be located in each section.

Water is used as a liquid for feeding into a container and preparing a coagulant solution.

The pipeline for supplying water provides its supply to each section of the tank.

In addition, compressed air and / or heated or hot water or steam under pressure are used as a substance to accelerate the dissolution of the coagulant.

Moreover, the acceleration of the dissolution of the coagulant is achieved by increasing the intensity of mixing the liquid (water) with the coagulant, which is provided by the supply of compressed air (under pressure). In addition, the acceleration of the dissolution of the coagulant is achieved by increasing the temperature of the liquid (water) with the coagulant, which is provided by the supply of heated or hot water or water vapor.

When heated or hot water or steam is supplied under pressure, the dissolution of the coagulant in the liquid is significantly accelerated, since, on the one hand, the temperature of the liquid increases, and on the other, the intensity of mixing the liquid increases.

Moreover, the ability to supply compressed air and / or heated or hot water or water vapor under pressure leads to an improvement in the dissolution of the coagulant, which makes it possible to improve the quality of the coagulant solution by increasing its homogeneity.

Substances to accelerate the dissolution of the coagulant are fed from the bottom of the container, for this, a pipeline for supplying substances to accelerate the dissolution of the coagulant is cut into the bottom of the container or into the lower side of the container or section of the pipeline, and placed in a container with liquid, while this section of the pipeline can be perforated for bubbling.

The working body of the mixer is made in the form of a shaft (axis) with blades perpendicular to it.

The mixer shaft can be installed in the tank (section) of the unit vertically (vertical mixer) or horizontally (horizontal mixer). With horizontal installation of the axis of the stirrer, flat blade stirrers, anchor, frame, can be used.

With the vertical axis of the mechanical stirrer, any kind of stirrer blades, including anchor ones, can be used. When using a paddle mixer for vertical installation, it is desirable to use inclined flat blades with an angle of inclination of more than 90 degrees, in order to raise a thick solution with lumps up for complete dissolution. The blades of the mixers with a vertical axis are located perpendicular to the axis, starting from the very bottom, with the horizontal axis of the mixers, the blades are also perpendicular to the axis.

Mechanical horizontal mixers can be installed in several sections on the same axis with the possibility of rotation by one engine, which greatly simplifies the design of the device. In each section, several blades can be installed on the shaft.

In vertical mixers, the axis of rotation of the mixers is perpendicular to the bottom of the tank

Mechanical mixers in each section can be located on different axes with the possibility of rotation around it. Agitators can be mounted vertically in sections. In each section, one or more mechanical agitators can be arranged.

The use of horizontal mixers in the design of the device (a horizontally mounted main axis of a mechanical mixer with several flat blades perpendicularly mounted on the shaft) provides an increase in the mixing efficiency of hygroscopic raw materials (coagulant) adhering to large fractions due to better breaking up of large fractions in comparison with the vertical mixer installed in capacity in an upright position with perpendicularly mounted blades. The starting moment of the horizontally mounted mixer is stronger and the stirring of the undissolved product is several times greater than with the vertical arrangement of the mixer, due to physical factors. In addition, when using a frame mixer with horizontal shaft installation, it is possible to achieve an additional increase in the quality of the coagulant solution due to better breakdown of large fractions compared to a mixer installed in a container in an upright position.

 With a vertical arrangement of the mixer with a particularly large lumpiness of the raw material, jamming of the mixer may occur, which does not occur with a horizontal arrangement of the mixer. Thus, the implementation of the specified horizontal mixers in the device provides an additional increase in the degree of homogeneity of the solution, complete dissolution of the coagulant in the liquid is achieved, which leads to an additional increase in the quality of the coagulant solution and allows to accelerate the process of obtaining the finished product. In addition, when installing a horizontal mixer, in order to obtain an optimal product, coagulants of any fraction can be added to the solution in dosage, and vertical devices can jam the device in such cases.

A filter (for example, a strainer or a filter of a different type) with a filter fineness of 50 to 5000 μm depending on the type of coagulant is installed in the discharge pipe of the finished coagulant solution. The implementation of the filter in the pipeline drainage of the finished solution of the coagulant provides a significant improvement in the quality of the finished solution by removing mechanical impurities and large insoluble particles from the solution, which gives the solution a high degree of uniformity and homogeneity. In addition, the installation of a filter in the pipeline for withdrawing the finished solution allows the coagulant production process to be carried out continuously without loss in productivity (high productivity of the process remains), which is due to the absence of the need to stop the process for periodic filter cleaning. Removing and cleaning the filter can be carried out directly during the preparation of a coagulant solution. So, in the device disclosed in the patent of the Russian Federation No. 174132, 10/03/2017, it is necessary to stop the process of obtaining a coagulant for cleaning the filter grid, since the specified filter grid is installed directly at the bottom of the tank to obtain the coagulant, which significantly reduces the productivity of the process.

In addition, the presence in the device of both mechanical stirrers and a substance supply pipe to accelerate the dissolution of the coagulant makes it possible to achieve an increase in the dissolution rate of the coagulant per unit time, which leads to the achievement of a high productivity of the coagulant production process. In addition, the presence in the device of both mechanical agitators and a substance supply pipeline to accelerate the dissolution of the coagulant ensures the preservation of performance in the event of technological difficulties associated with either failure of the agitators or the inability to supply compressed air and / or hot or heated water, or steam or lack of ability to organize the operation of pumps.

The essence of the utility model is illustrated by figures 1-2.

The figure 1 shows the installation diagram with horizontally mounted mechanical stirrers.

The figure 2 shows the installation with vertically mounted mechanical stirrers.

 In the figures, positions 1-15 show:

1 - installation capacity,

2 - sections of the tank,

3 - cover

4 - pipeline for supplying water,

5 - pipeline for supplying substances to accelerate the dissolution of the coagulant,

6-axis for the installation of mechanical mixers,

7 - mechanical mixers,

8- engine

9 - pump pipeline selection of the finished solution,

10 - strainer selection system of the finished solution,

11- circulation pump

12 - discharge pipelines,

13 - pipelines for removal of the finished solution of coagulant,

14 - crane

15 - blade

16 - sampler cock.

Installation for preparing a coagulant solution contains a container 1 made of stainless steel or other material inert with respect to coagulants in the form of a vertical tank. The tank 1 is divided into sections 2. A pipe for supplying the water 4 necessary for dissolving the coagulant is cut into each of the sections 2 of the tank 1. The container sections are made with removable covers 3. The capacity of the installation (sections of the capacity of the installation) can be made in the variant without a cover 3. Separate hatches for loading raw materials, including using various mechanisms, can also be cut into the container (sections). A pipeline for supplying a substance to accelerate the dissolution of coagulant 5 is connected to each section of the container 2. The supply of the specified pipe is made by inserting the pipe into the bottom of the container section so that the pipe section is located inside the container sections, while this pipe section is made with perforation for bubbling. In the bottom of each of the sections of the tank, a pipe for draining the finished coagulant solution 13 is embedded.

An axis (shaft) 6 is horizontally mounted in the container 1 with the possibility of rotation, which passes through all sections 2 (except for the case of a vertical arrangement of a mechanical stirrer in the container). The blades 15 are located on the axis 6. Thus, each section 2 contains blades 15. In each section, one or more mechanical stirrers or blades can be located. The mechanical stirrers 7 are fixed on one axis 6 with the possibility of rotation around the axis 6. The rotation of the mechanical stirrers 7 is carried out using the engine 8.

The installation in the version with horizontal mixers is equipped with a circulation pump 11 with discharge pipes 12 and valves 14. Pressure pipes 12 are included in each of sections 2. The circulation suction pipe starts from the middle of the tank closer to the tank wall (section), and the discharge pressure feed pipe from the circulation the pump is located almost at the bottom of the tank in order to more fully dissolve the coagulants.

A mesh filter 10 is installed in the pipeline for withdrawing the finished coagulant solution 13. The pipe 13 contains sections for entering each of the sections 2 of the installation. To select the finished coagulant solution at each section of the pipeline 13 at the outlet of each section 2 of the Device 1, sample taps 16 are installed. A pump 9 is installed on the pipeline 13 to pump the finished product from the Unit.

Installation works as follows.

The first section of the tank 1 is filled with water to the required level through the pipeline for supplying water 4, the valve closes, the lid 2 of the first section of the tank 1 opens, the coagulant is poured, preventing foreign substances from entering the section. In the presence of a loading hatch, the coagulant is poured through this hatch, including using various mechanisms. In the same way, the remaining sections 2 of tank 1 are filled. After loading the coagulant in the tank 2, the engine 8 is turned on, which ensures rotation of the axis 6 with mechanical stirrers installed on it 7. The process of dissolution of the coagulant has begun.

 After 0.5 hours of stirring, a sample of the solution is taken from the first section by means of the outlet pipe for the finished coagulant solution 13 to determine the density of the solution and evaluate the dissolution rate. The intake of the solution is provided by the taps of the sampler 16.

If necessary, accelerate the process of dissolution of the coagulant due to the intensification of the mixing process in the pipeline for supplying substances to accelerate the dissolution of the coagulant 5, compressed air is supplied under pressure. Also for these purposes, in horizontal mixers, a circulation discharge head from a circulation pump 11 can be used. Samples are taken every 0.5 hours. When the desired density of the solution in the containers is reached, stirring is stopped, the dissolution operation is completed.

In cold time, to accelerate the process of dissolution of the coagulant by increasing the temperature of the liquid (solvent) after loading the coagulant in section 2 of the container through a pipeline for supplying a substance to accelerate the dissolution of coagulant 5 in a dosage, in accordance with those. process, hot water or heated water is supplied, or steam for heating water designed to dissolve the coagulant. Water is heated at a temperature below 15 ° C. When the water in the sections is heated to 40-50 ° C, the supply of steam or hot or heated water is stopped. When the temperature drops, steam or hot or heated water is supplied again.

The finished solution from the sections is pumped out by the pump 9, previously opening the valve 14 on the pipeline 13. The finished solution is pumped through the pipeline for the selection of the finished solution 13 into the transport tank. The process is completed.

Installation for the preparation of a coagulant solution can be made on standard equipment using well-known materials and technologies.

Thus, an increase in the solubility of the coagulant in the liquid due to the use of mechanical stirrers in the device, the supply of a substance accelerating the dissolution of the coagulant into the liquid with the coagulant (by heating the liquid or providing additional mixing), as well as the possibility of filtering the coagulant solution from mechanical impurities, allows to achieve a high degree homogeneity, homogeneity of the coagulant solution and significantly improve its quality.

Claims (5)

1. Installation for the preparation of a coagulant solution, characterized in that it contains a container, a pipeline for supplying water to the container, a pipe for withdrawing the finished coagulant solution, a pipe for supplying a substance to accelerate the dissolution of the coagulant, a mechanical stirrer, a filter installed on the pipe for withdrawing the finished coagulant solution. 2. Installation according to claim 1, characterized in that a strainer is installed in the selection system of the finished coagulant solution. 3. Installation according to claim 1, characterized in that the mechanical stirrers are mounted horizontally on one axis with the possibility of rotation around it. 4. Installation according to claim 1, characterized in that as a substance to accelerate the dissolution of the coagulant using compressed air and / or heated or hot water or steam under pressure. 5. Installation according to claim 1, characterized in that the loading of raw materials can be carried out through a separate hatch, including using mechanisms.

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