RU148741U1 - DEVICE FOR HEATING AIR - Google Patents

Abstract

1. An air heating device comprising an air heater and a gas path, characterized in that the device includes sensors for controlling and monitoring the gas combustion process and mixing the combustion products with the heated air. The device according to claim 1, characterized in that the control and monitoring of the gas combustion process and the mixing of combustion products with heated air is carried out using a control program on a computer.

Description

The device is intended for heating air in air heating systems of industrial and domestic premises. The device provides for the heating of air masses by mixing type air heaters by direct combustion of gas and dilution of the combustion products in the air of a heated room. The control system for the operation of the air heater ensures the safe operation of the device, the content of harmful impurities in the room within the limits of the MPC (maximum permissible concentration of harmful substances in the air of the working area). The control system is installed on the air heater and includes monitoring the gas pressure at the inlet to the burner, monitoring the air pressure in the system, monitoring the presence of flame in the burner, monitoring the temperature of the gas mixture at the outlet of the air heater, monitoring the content of harmful impurities CO and NO _x and unburned CH hydrocarbons in heated air.

A known method of flare air-jet heating of air and a device for its implementation (RF patent No. 2213299 F23D 14/02). The specified technical result is implemented in the claimed method of heating air by supplying air to an annular working chamber formed by perforated cylinders in the form of a system of oncoming jets supplied perpendicular to the surface of the cylinders, and the coolant is supplied to the working chamber in the form of a system of flares supplied perpendicular to air jets.

A device in which the claimed method is implemented also works as follows.

Fan blows air into the air chamber and into the gap between the body and the perforated cylinder, from where it is fed into the working chamber through the cylinder openings as a system of oncoming jets.

Through the pipe, gas is supplied to the gas chamber, where gas, distributed over the volume of this chamber, through a system of nozzle openings, is fed into the working chamber in the partition where the gas-air mixture is ignited by the ignition device.

The gas at the exit from the nozzle openings is ignited by the ignition device, forming a system of torches, the direction of which is parallel to the walls of the working chamber, and air jets supplied perpendicular to the torches organize a system of transverse torches in the volume of the working chamber, which reach the opposite walls of the working chamber and heat them to a temperature in which there is a guaranteed afterburning of carbon monoxide.

Unburned fuel remains in the working chamber by systems of air jets at the outlet of their working chamber are directed to the heated walls of the working chamber, where these residues are completely burned out.

The disadvantage of this method and device for its implementation is that it is impossible to control the complete combustion of hydrocarbons and the presence of CO in heated air under fluctuations in pressure, temperature and flow rate of air and gas entering the device.

The claimed technical result is achieved as follows. See Fig. 1. Fan 2 turns on and starts blowing air through the air heater (ANS) 1. The air flow through the air heater is controlled by gate 17 and the fan speed is changed using a frequency converter. Gas enters the system through valve 3. To purge the inlet gas line, open valve 4 "on the candle." After purging the line, the valve 4 is closed. The pressure in the manifold is indicated by a pressure gauge 6. A gas meter 9 is installed in the inlet gas manifold, which records the gas flow through the burner. The solenoid valve 7 allows gas to enter the mains to the ANS. The solenoid valve 10 allows gas access to the ignition burner. After ignition, the electromagnetic valve 8 opens, opening the passage of gas to the main burner. The gas flow rate is regulated by the regulating flap 11. Sensors are installed to monitor all parameters of the system. Signals from all sensors are sent to the control panel 5.

The device has gas pressure sensors on the inlet line 13 and 14, temperature sensors for the inlet air 16 and outlet 19, a pressure sensor in front of the fan 18, a flame control sensor 15, sensors for monitoring the content of harmful substances (CO and NO _x ) and non-burnt hydrocarbons (CH ) in the heated air at the outlet of the heater 20 and in the air of the heated room 21.

Remote control heater operates as follows. The control panel displays all the main controlled and adjustable parameters:

- temperature of cold air;

- temperature of heated air;

- the position of the rotary (control) valve on the gas pipeline;

- the position of the rotary (regulating) gate on the duct;

- current frequency of the fan current;

- state of the gas pressure switch sensors;

- the state of the relay sensors indicating the presence of impurities in the room air;

- state of the sensor-relay of flame control.

Sensors are divided into emergency and control. Emergency sensors turn off the heater when the parameters for the presence of harmful impurities in the room air are exceeded, the gas pressure at the inlet to the gas main is reduced, when the air pressure in front of the fan is reduced, when the flame control sensor is triggered.

Depending on the task, control sensors can change the operation modes of the air heater, change the volume and temperature of the heated air.

When adjusting the operation of the heater, changing the input parameters, they work in the optimal mode, with minimal values of harmful impurities and unburned particles of hydrocarbons in the combustion products, achieving a more complete combustion of the fuel, bringing it to 100%.

The indicated air heating device will increase the efficiency of fuel combustion, reduce the consumption of fuel used for heating and reduce the amount of harmful substances emitted into the atmosphere, that is, increase the environmental friendliness of the room heating system.

Claims (2)

1. An air heating device comprising an air heater and a gas path, characterized in that the device includes sensors for controlling and monitoring the gas combustion process and mixing the combustion products with the heated air. 2. The device according to claim 1, characterized in that the control and monitoring of the gas combustion process and the mixing of the combustion products with the heated air is carried out using a control program on a computer.

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