RU170700U1 - STAND FOR CALIBRATING MAINTENANCE NOZZLES - Google Patents

Abstract

The utility model relates to the field of devices in the power system for testing fuel equipment, in particular nozzles for power boilers, in order to determine the optimal flow and adjustment characteristics of nozzles. A feature of the claimed solution is the use of an automated axial nozzle displacement assembly relative to the diffuser, which makes it possible to influence the aerodynamics of mixture formation by changing the contact points of the swirling air streams with the sprayed aerodispersed liquid medium and automatically determining the optimal position of the nozzle in the furnace relative to the diffuser using a computer program. The technical result is the improvement of atomization and the choice of the optimal position of the nozzle relative to the diffuser in the furnace and, as a result, the elimination of burning oil in the furnace. 2 ill.

Description

The utility model relates to the field of devices in the power system for testing fuel equipment, in particular nozzles for power boilers, in order to determine the optimal flow and adjustment characteristics of nozzles.

Closest to the claimed device is a stand for calibration of fuel oil nozzles, containing an electronic unit for collecting signals and controlling the stand, an injection chamber, a pipe for supplying water, a supply tank for water, a pallet, a pipe for draining water, a pipe for supplying atomizing air, a receiving air box, air supply duct for swirl blades, swirl blades, diffuser, exhaust duct, brackets, racks, base, protective cap, coordinate rulers, flow meter, thermometer, manometer, locking and regulating veins il, electric pump, electric fan of air emission into the atmosphere, light lamp, video camera, knot for turning swirl blades connected by electrical connections to the electronic unit for collecting signals and controlling the stand (see utility model patent No. 105438 of June 10, 2011 - a stand for calibration of fuel oil nozzles).

Disadvantages of the famous stand:

1. The inability to influence the spraying process swirling air-water mixture using automated axial movement of the nozzle.

2. The lack of automated selection of the optimal position of the nozzle relative to the diffuser to obtain the best spraying results.

These disadvantages are eliminated in the inventive utility model, which is aimed at solving the problem of improving atomization and choosing the optimal position of the nozzle relative to the diffuser in the furnace and, as a result, eliminating oil burnout in the furnace.

In the claimed design, this problem is solved by using an automated axial nozzle displacement unit relative to the diffuser, which allows affecting the aerodynamics of mixture formation by changing the contact points of the jets of swirling air streams with the sprayed aerodispersed liquid medium and automatically determining the optimal position of the nozzle in the furnace relative to the diffuser using a computer program.

A diagram of the inventive device is shown in FIG. 1 in a side view, in FIG. 2 shows a cross-sectional view of the injection chamber. In FIG. 1, thin lines show the electrical connections between the primary sensors and the nodes with the electronic signal collection and control unit 28. Thick lines show the main nodes of the stand. In FIG. 2, in the cross section of the injection chamber, the electrical connections are not conventionally shown.

In FIG. 1, 2 positions indicate the following nodes and elements of the claimed design:

1 - nozzle

2 - injection chamber,

3 - pipe for supplying water,

4 - flow meter

5 - thermometer,

6 - pressure gauge,

7 - shut-off and control valve,

8 - electric pump,

9 - consumable tank for water,

10 - pallet

11 - pipe drain water

12 - pipe for supplying atomizing air,

13 - receiving air box,

14 - pipe air supply to the blades of the swirl,

15 - blades of the swirl,

16 - diffuser

17 - dispersed and swirling air-water mixture,

18 - exhaust duct

19 - electric fan air discharge into the atmosphere,

20 - brackets,

21 - racks,

22 - base

23 - lighting lamp

24 - a protective cap,

25 - video camera,

26 - coordinate rulers,

27 - node rotation of the blades of the swirl,

28 is an electronic unit for collecting signals and controlling the stand,

29 - node automated axial movement of the nozzle.

The purpose and interaction of nodes and elements is as follows. The injection chamber 2 is designed to hold the dispersed dispersed and swirling air-water mixture 17 in suspension, simulating a torch in the boiler furnace.

A pipe 3 for supplying water with a flowmeter 4, a thermometer 5, a manometer 6 and a shut-off and control valve 7, connected by electrical connections to the electronic unit for collecting signals and controlling the stand, serves to measure and control the parameters of the model medium - water to the nozzle 1.

The electric pump 8 delivers water from the supply tank 9 according to the computer program of the electronic unit 28. After passing through the nozzle 1 and staying in the form of finely divided particles in suspension in the chamber 2 in the form of “cold fog”, the water condenses and flows into the pan 10, from where it flows through the drain pipe 11 into the sump (not shown in FIG.) for subsequent use.

Using a pipe 12 for supplying atomizing air, water droplets are crushed by an air stream directly in the nozzle 1. Placed on the pipe 12: a flowmeter 4, a thermometer 5, a pressure gauge 6 and a shut-off and control valve 7 (to simplify the drawing of FIG. 1, position designations: flowmeter 4 , thermometer 5, manometer 6 and shut-off and control valve 7 are identical to those shown on the pipe 3 for water) are used to measure temperature and pressure and control the flow of air supplied from the receiver and pumped by the compressor at various pressure (in Fig. 1 and 2, the receiver and compressor are not shown).

The intake air box 13 (made identical to the burner box on the boiler) serves to evenly circulate the air supplied through the pipe 14 to the blades of the swirler 15, which creates swirling air jets for further mixing of the liquid particles with air. In the final form, a dispersed and swirling air-water mixture 17 is formed, simulating the aerodynamics of the torch jet in the boiler furnace. The parameters of this suspension: diameter, length, configuration of the torch and the size of the microparticles in this flare jet, are recorded by the video camera 25 using optical sensors of the coordinate lines 26 (in Fig. 1, the sensors are conventionally not shown).

The rotation of the blades of the swirl 15 is made by the node 27 at the command of a computer program from the electronic unit 28 for collecting signals and controlling the stand. Air in the pipe 14 is supplied from the receiver of the compressor (in Fig. 1 and 2, the receiver and compressor are not shown).

The diffuser 16 serves for the initial deployment at a certain angle of exit of the dispersed and swirling air-water mixture 17 from the end of the nozzle 1 (in Fig. 1 the end is shown by a thickened line).

An exhaust duct 18 and an electric fan 19 are used to discharge excess airborne suspensions into the atmosphere and simulate the vacuum in the boiler furnace.

Racks 21 and the base 22 are used to maintain the weight of the nozzle 1 when it is placed on the stand. The brackets 20 are used to guide the nozzle body 1 during its longitudinal movement using the node 29 of the automated axial movement of the nozzle, controlled by a computer program of the electronic signal collection and control unit 28.

A protective cap 24 protects the lamp 23 from dropping water drops on it.

The coordinate lines 26 have optical sensors for fixing in a planar and three-dimensional image of the boundaries of the suspension - dispersed and swirling air-water mixture 17, which is a configuration of the model torch (in Fig. 1 and 2, the sensors are not shown).

The computerized electronic unit 28 for collecting signals and controlling the stand has a monitor with duplicate recording on paper of all parameters of the dispersed and swirling air-water mixture 17, water and air pressures, and signal sensors from the coordinate lines 26 and the signal from the video camera 25. From block 28, control is performed and registration of longitudinal axial movements of the nozzle 1 relative to the diffuser 16, carried out by the node 29.

From the linear distance along the axis of the end face of the nozzle 1 relative to the clamping of the diffuser 17 (clamping is shown in FIG. 1, the smallest diameter of the diffuser is not indicated), the angle of the opening of the torch — dispersed and swirling air-water mixture 17 and the length of the torch, which is necessary for complete burnout of fuel oil in real conditions. In the well-known stand, this optimum length is not determined, and therefore, under real conditions of fuel oil burning in the furnace, it is impossible to accurately determine the optimal position of the nozzle end relative to the diffuser of the boiler furnace embrasure and to exclude fuel oil burning in the furnace. This is a positive effect of the inventive stand in relation to the known design.

The inventive design of the stand works as follows. The calibrated nozzle 1 is installed in the guide brackets 20 and is mounted in the node 29 of the automated axial movement of the nozzle.

The place of passage of the nozzle 1 through the intake air box 13 is sealed. Water supply pipes 3, pipelines for supplying atomizing air 12 are connected to the nozzles 1.

From block 28, a wet air exhaust fan 19, a lamp 23, a video camera 25, coordinate line gauges 26, air supply 14 to the intake air box 13 and swirl blades 15 are turned on sequentially, air supply 12 to the nozzle 1, water supply through the pipe 3 to the nozzle one.

In nozzle 1, water is crushed into droplets using atomizing air and water pressure and the subsequent swirling of the mixture by the air flow leaving the blades of the swirler 15.

Using the video camera 25 and sensors on the coordinate rulers 26, the length, diameter and boundaries of the configuration of the model plume are recorded, which are obtained by crushing water droplets in the nozzle at a given position relative to the diffuser 16 of the nozzle cut-off 1, marked using the node 29 of the automated axial movement of the nozzle 1 on electronic unit monitor 28.

Recording the linear distance of the automatically moving end of the nozzle 1 relative to the pinch (smallest diameter) of the diffuser 16 (the pinch is not indicated in Fig. 1), at which the optimal parameters of the model torch are obtained, is a positive effect compared to the known design in which the nozzle is stationary.

The signals from the video camera 25 and sensors on the coordinate lines 26 are transmitted by electrical communication to the electronic unit 28, which also supplies the pressure, temperature and flow rate of the spraying air, water and the angles of the blades 15 of the air twist.

Based on these signals, the dependencies of the flow rate on the pressure of water and air, the diameter of the droplets on the pressure of water and air, the length and diameter of the model torch on the pressure of water and air, depending on the direction of the air twist on the blades 15 and the position of the end face of the nozzle 1 relative to the diffuser 16. The optimal position of the end face of the nozzle 1 relative to the diffuser 16 is selected, at which the required length and diameter of the torch and finely divided liquid are obtained. Then, the expenditure and adjustment characteristics of the nozzle are recalculated from the model medium - water to fuel oil.

Claims (1)

A stand for calibrating fuel oil nozzles, containing an electronic signal collection and control unit, an injection chamber, a water supply pipe, a water supply tank, a pan, a water drain pipe, a spray air supply pipe, an air intake box, an air supply pipe to the swirl blades , swirl blades, diffuser, exhaust duct, brackets, racks, base, protective cap, coordinate lines, flow meter, thermometer, pressure gauge, shut-off and control valve, electric pump, electric blower air into the atmosphere, a lighting lamp, a video camera, a knot for turning swirl blades, electrically connected to an electronic unit for collecting signals and controlling a stand, characterized in that there is a node for automated axial movement of the nozzle, connected by electric connection to an electronic block for collecting signals and controlling a stand and mechanically moving the nozzle relative to the diffuser at the command of the computer program of the electronic unit for collecting signals and controlling the stand.

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