RU2028051C1 - Internal mixing atomizer - Google Patents

Abstract

FIELD: humidifying and disinfection of air in rooms; liquid spraying. SUBSTANCE: internal mixing atomizer has straight pipeline with stopped end and outlet channels on wall. Ratio of pipeline cross section area to summary area is at least 2. Connected to outlet channels of pipeline are stopped branch pipes with radial holes or slot nozzles. Pipeline has liquid and compressed air connections. Liquid connection has flow regulator. EFFECT: enlarged operating capabilities. 3 cl, 5 dwg

Description

 The invention relates to techniques for spraying liquids and can be used for ultralow exchange spraying of plants, humidification, disinfection of premises.

 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 ≈16 m).

 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, the processing efficiency is reduced.

 Known atomizer of internal mixing, consisting of a pipeline with nozzles for supplying liquid and compressed air, placed on its wall by output channels and a damped end.

 The disadvantage of this atomizer is the low efficiency of the dispersion process, which is associated with an increase in friction losses during the movement of liquid and air in a curved pipeline. In addition, the possibility of performing a long pipeline, and hence the processing of large areas, is excluded, since an unstable outflow of an air-liquid mixture occurs in this sprayer.

 The aim of the invention is to increase efficiency and provide the possibility of processing large areas.

 This goal is achieved by the fact that in the atomizer of internal mixing, consisting of a pipeline with nozzles for supplying liquid and compressed air, outlet channels placed on its wall and a blanked end, the pipeline is made straightforward, and the nozzle for supplying liquid is equipped with a flow regulator, and the ratio of the cross-sectional area of the pipeline and the total area of the output channels is at least two.

 In addition, a plugged pipe with radial holes is connected to the outlet channel of the pipeline. Radial holes can be made in the form of slotted nozzles.

 The implementation of the pipeline is straightforward with the proposed ratio of the cross-sectional area of the pipeline to the total area of the output channels provides stabilization of the film layer of the liquid and reduction of friction during the movement of the two-phase flow, which makes it possible to obtain a high-quality spray and increase the length of the pipeline with lower supply pressure and air flow, i.e. increase efficiency and provide the ability to handle large areas.

 The presence of a flow regulator on the fluid supply pipe allows you to set the optimal ratio of air to liquid to obtain the desired spray quality, thereby reducing the weight of air flow and increasing atomization efficiency.

 Connection to the outlet channel of a muffled pipe with radial holes or slotted nozzles allows the processing of vertical surfaces, which expands the scope of the sprayer.

 As a result of the analysis of the proposed solution for compliance with the criterion of "significant differences", the applicant has not found technical solutions with a similar set of features.

 Thus, the applicant believes that the proposed technical solution meets the criterion of "significant differences".

 Figure 1 shows a spray of internal mixing, General view; in FIG. 2 - plugged pipe with radial holes; figure 3 - radial hole made in the form of a slotted nozzle; figure 4 is a diagram of the direction of the torches to plants; figure 5 is a graph of the pressure drop depending on the ratio of the cross-sectional area of the pipeline and the total area of the output channels.

 The internal mixing spray contains a straight pipe 1 with output channels 2 located on its wall and a plugged end 3. An input unit consisting of air and liquid supply pipes 4 and 5, respectively, is connected to the pipe 1. The pipe 5 is equipped with a flow regulator 6. The ratio of the cross-sectional area of the pipeline 1 and the total area of the output channels 2 is at least two.

 In addition, a plugged pipe 7 with radial holes 8 can be connected to each of the output channels 2. The holes 8 can be made, for example, in the form of a slotted nozzle 9.

 The sprayer operates as follows.

 Compressed air and liquid under a pressure of 0.1-0.4 MPa are supplied to the nozzles 4 and 5. The flow rate regulator 6 sets the required spray capacity. A stream of air conveys the liquid in the form of a thin film along the wall of the pipeline 1.

 From the outlet channels 2 located along the length of the pipeline 1, air-liquid jets flow out, which, when interacting with the environment, decompose into droplets. In this case, one or several rows of directed torches can be arranged on the horizontal surface to be treated. When connected to the output channel 2 of the plugged pipe 7 with radial holes or slotted nozzles 9, it is possible to process different vertical surfaces, for example, plants from the sides (see figure 4).

Experimental studies of the models of a rod sprayer of internal displacement showed that the spray quality and efficiency mainly depend on the ratio of the cross-sectional area of the pipeline S _in and the total area of the output channels S _out and on the ratio of air and liquid flow rates.

, где Р_н - давление в начальном канале; Р_к - давление в конечном канале, Р_вх - давление на входе трубопровода от отношения S_вх/S_вых. Как следует из графика при S_вх/S_вых > 2 уменьшается сопротивление движению смеси по трубопроводу.In FIG. 5 shows the dependence of friction losses

where R _n - pressure in the initial channel; P _to - pressure in the final channel, R _I - pressure at the inlet of the pipeline from the ratio S _I / S _o . As follows from the graph, when S _in / S _out > 2, the resistance to movement of the mixture through the pipeline decreases.

The tests of an experimental sample of a portable low-exchange liquid atomizer with a working width of 16 m showed a satisfactory spray quality while reducing the relative weight flow rate of air and liquid G _in / G _w to 0.125. Compared with pneumatic sprayers of external mixing / G _in / G _w ≈ 0.5 /, the developed sprayer allows to reduce the energy consumption for the process of dispersing the liquid and significantly simplify the design. Compared to the hydraulic sprayers of the OP-1200 sprayer, the processing quality is improved and the flow rate of the working fluid is reduced by 16 times, and reliability is also increased due to the absence of clogging of the output channels.

 Thus, the proposed spray internal mixing provides high-quality processing of large areas and significantly increases the efficiency of the dispersion process.

Claims (3)

 1. INTERNAL MIXING SPRAY, consisting of a pipeline with a pipe for supplying liquid and compressed air, output channels placed on its wall and a blanked end, characterized in that, in order to increase efficiency and enable processing of large areas, the pipeline is made straightforward, and the area ratio the cross section of the pipeline to the total area of the output channels is at least two, and the fluid supply pipe is equipped with a flow regulator.  2. The sprayer according to claim 1, characterized in that a plugged pipe with radial openings is connected to the outlet channel of the pipeline.  3. The sprayer according to claims 1 and 2, characterized in that the radial holes are made in the form of slotted nozzles.

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