RU61986U1 - AEROSOLIZATION PLANT - Google Patents

Abstract

The utility model relates to devices for spraying liquids and can be used for treating plants with entomopathogenic preparations, disinfecting rooms, humidifying the air, etc. operations. Installation for aerosolization, contains a node for supplying a spraying agent, a spraying device and a vessel with a working solution in which a tube connected with a spraying device is immersed, wherein the spraying device, made in the form of at least one ejector, is placed inside the vessel with the working solution above the surface of the liquid moreover, the container is connected by a hole with the environment. As a rule, a vessel with a working solution is made in the form of a container equipped with a removable lid in which there is an opening. Ejectors are installed inside the vessel with the possibility of their rotation, and their installation is optimal so that the aerosol flow in the vessel is directed chordoidally onto its walls.

Description

The utility model relates to devices for spraying liquids and can be used for treating plants with entomopathogenic preparations, disinfecting rooms, humidifying the air, etc. operations.

Known rod sprayers, consisting of a pipe connected to a fluid supply source with fluid sprayers installed along its length. These sprayers provide the ability to process large areas (the length of the boom of standard sprayers is ~ 1-6 m). (Jesua. Spraying of crude and residual petroleum products.

Power Machines, 1979, vol. 101, No. 2, p. 44-51; Kim K.V., Marshall W.R. Drope-size distributions from pneumatic atomizers. A.I.Ch. Journal, 1971, v.17, No. 3, p. 575-584.)

However, due to the low quality of atomization (the diameter of the droplets of the hydraulic atomizers is in the range of 200-500 microns) and the possibility of clogging the atomizers, their use is quite limited.

Known atomizer of internal mixing, consisting of a pipeline with nozzles for supplying liquid and compressed air, placed on its wall by the output channels and a blanked end (SU 1248671, 1984)

The disadvantage of this atomizer is the low efficiency of the dispersion process, which is associated with an increase in friction losses during fluid movement

and air in a curved pipeline. In addition, an unstable outflow of an air-liquid mixture occurs in this atomizer.

To increase the efficiency of aerosolization, the aerosol generator is equipped with additional turbines (SU 1431848, 1986), however, this complicates the design of the installation.

Closest to the claimed technical solution is the installation for aerosolization, consisting of a unit for supplying a spray agent (compressed air), a spray unit in the form of a slotted nozzle and a sealed container with a spray solution, in which a tube is placed connecting it with the spray unit (RU 2060840, 1992 )

The disadvantage of this device is its relatively low performance.

The technical problem solved by the authors was the creation of a more efficient device, providing an additional opportunity to generate aerosol with particles of various given sizes.

The technical result was achieved due to the fact that the spray device, made in the form of at least one ejector, is placed inside the vessel for the working fluid above its surface, and the vessel itself is connected by a hole with the environment. As a rule, the number of ejectors is from 4 to 6, depending on the volume of the housing and the characteristics of the problem.

The best option for the device is the implementation of the vessel for the working fluid in the form of a container with a removable cover provided with an opening.

To ensure the ability to work in various modes, ejectors are installed with the possibility of rotation. To obtain an optimal aerosolization result, the ejectors inside the vessel are arranged in such a way as to ensure the aerosol flow moves along the chordoial, which ensures that the flow collides with the walls of the container and separates large droplets of aerosol.

The aerosolization unit (UAD) consists of an aerosol generator and a spray agent preparation line.

A general view of the aerosol generator is shown in Fig. 1, where the following notation is introduced:

1. vortex ejector atomizer

2. cap

3. housing

4. reflector

5. challenge

6. wiring

7. connecting tubes

8. spray nozzle

9. stand

10. insert

11. spray nozzle

12. ring

13. stub

14. locknut

15. seal

16. locknut

17. nut

18. screw carbine

19. pipe

20. aerosol drops

21. line for supplying a spray agent.

The general scheme of the device for aerosolization is shown in Fig. 2, where the following notation is used:

22. aerosol generator

23. flow meter

24. filter

25. pressure reducer

26. pressure gauge

27. receiver

28. safety valve

29. compressor with engine

The nebulizers 1 are mounted with the possibility of a fixed rotation inside the housing 3 of the generator 22 and are attached to the wiring 6 or outlet 5 by means of a lock nut 16. If necessary, part of the nebulizers 1 are dismantled and plugs 13 are installed instead. The inlet tubes of the nebulizers 7 are connected to the nozzles 11 of the nebulized intake pipe product. The wiring 6 of the spray agent (air) is attached (screwed) to the stand 9. Using the insert 10, you can change the position of the nozzles 1 along the height of the housing 3.

Installation works as follows. When carrying out work on the spraying of drugs, the nozzle 8 is connected to the compressor 29 by means of a flexible hose; through the pipe 19, the drug is poured, the compressor is connected to the electrical network and turned on. Using a pressure reducer 25, the pressure in the inlet hose to the generator is set, which is regulated by a pressure gauge 26. The spray air enters the generator 22 through the nozzle 8 and through the wiring of the stand 9 through the wiring 6 to the nozzles 1. The tangential air inlet in the vortex chamber of the atomizer 1 forms swirling flow with an expansion zone along its axis. Through the tube 7, the sprayed liquid is ejected from the bottom of the housing 3 and sprayed onto the droplets. Chordal installation of nozzles ensures twisting of a two-phase flow, while large droplets are deposited on the walls and flow to the bottom of the generator, while small droplets are carried away by the air flow through the pipe 19

The installation has three main operating modes:

- a mode with the installation of nozzles 1 at the outlets 5, as a result of which double separation of large drops is achieved and the finest dispersed aerosol is obtained;

- the mode with the cover 2 removed and the nozzles 1 installed with the direction of the sprayed torches inside the housing 3, the use of which ensures a single separation of droplets on the walls of the housing 3, which leads to an increase in the dispersion of the droplets, however, the installation productivity is increased

- mode with the cover 2 removed and the installation of nozzles 1 with the direction of the torches outside the housing 3, which ensures maximum generator performance with a maximum particle size of the aerosol.

The installation has the following parameters:

- aerosol dispersion of not less than 50 microns;

- productivity is no more than 0.2 l / min;

- air pressure - 0.1-0.3 MPa;

- air consumption - 50-200 l / min

- tank capacity - 4.5 l.

Example 1. The installation was tested for disinfection of microorganisms on the example of culture of E. coli strain M-17. To obtain a working suspension, a suspension with a cell concentration of 10 ¹⁰ cells / ml was used. The cell culture was sprayed in a chamber with a capacity of 2870 l using a pneumatic sprayer. Spraying the solutions of the EDA disinfectant was carried out using the UAD unit in mode 1 (with a lid on). The mass median diameter of the aerosol particles was 3.5 μm. Spray time - 1 min. The concentration of microorganisms was determined by fluometry by the amount of uranium. Control was carried out using saline.

The results showed that after 1 min there were no live microorganisms in the chamber. When using saline, the titer of microorganisms practically did not change.

Example 2. In the conditions of example 1, the installation was tested in mode 2 (with the cover removed). The mass median diameter of the aerosol particles was 5.8 μm. The results showed that after 1 min the concentration of microorganisms in the chamber decreased by 12 times, after 4 minutes there were practically no living microorganisms in the chamber. When using saline, the titer of microorganisms practically did not change.

The results obtained indicate the effectiveness and industrial applicability of the inventive installation for aerosolization.

Claims (4)

1. Installation for aerosolization containing a node for supplying a spray agent, a spray device and a vessel with a working solution into which a tube connected with a spray device is immersed, characterized in that the spray device, made in the form of at least one ejector, is placed inside the vessel with the working solution above the surface of the liquid, and the container is connected by a hole with the environment. 2. Installation according to claim 1, characterized in that the vessel is made in the form of a container equipped with a removable lid in which there is an opening. 3. Installation according to claim 1, characterized in that the ejectors are installed inside the vessel with the possibility of their rotation. 4. Installation according to claim 3, characterized in that the ejectors are installed so that the aerosol flow in the vessel is directed chordoidally onto its walls.