RU2425287C1 - Modulated atmospheric gas burner - Google Patents

Abstract

FIELD: power industry.

SUBSTANCE: modulated atmospheric gas burner contains gas valve, control and monitoring unit with orifice, temperature, flame and draught sensors, ignition and main burners, pulse tubes; at that, temperature sensor is equipped with orifice; temperature sensor is connected by means of pulse tube to control and monitoring unit by means of orifice having the possibility of providing modulating ability of combustion of the main burner in interaction with orifice and control and monitoring unit when the temperature specified with temperature sensor is reached.

EFFECT: invention allows simplifying the design, improving reliability, economy and stable operation at gas pressure increase.

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Description

FIELD OF THE INVENTION

The invention relates to energy, in particular to modulated atmospheric gas burners, and can be used in gas burner devices of steam and hot water boilers for outdoor and indoor use.

State of the art

Known atmospheric gas burner containing a gas controller, consisting of a control unit connected to a temperature sensor using a control channel, a control unit connected to flame sensors, traction, a control channel, while it is equipped with a second gas controller consisting of a control unit connected with temperature and outdoor air sensors, a control unit, while the second gas regulator is installed with the possibility of parallel connection of the cavities of the control units and the temperature sensor fresh air by connecting a second gas regulator to the control unit, and the percentage of gas supply to the burner by both regulators is set by taps (see Pat. RU No. 2196939, IPC F23N 1/10, F23D 14/60).

The disadvantage of this burner is the incomplete combustion of fuel, the complexity of the design.

Known atmospheric gas burner containing two gas controllers connected in parallel, each of which consists of a control and regulation unit, a start button, a rigid center membrane, a valve with a seat, an upper cavity, a membrane and a two-position shutter, a drain nozzle and a pressure source nozzle, throttle, channel, flame sensors, draft and network gas, valve, igniter, burner, thermostat with a temperature sensor, gas manifold (see. Atmospheric gas burner. RGU-M 1 operating manual. Ca 2.5 74.023.RE RE OJSC "Plant Starorusspribor", 175200. Staraya Russa, Novgorod Region, Mineralnaya St., 24).

The disadvantage of this burner is incomplete combustion of gas due to incomplete mixing of gas with primary air, low efficiency.

The closest in technical essence and the achieved positive effect is a modulated atmospheric gas burner, adopted by the author as a prototype, containing a gas valve, an automatic gas flow controller, connected in series, while the gas valve consists of a control and regulation unit, a start button, a membrane with a rigid center , valves with seat, upper cavity, diaphragm and on / off damper, drainage nozzle and pressure source nozzle, throttle with channel, flame, traction and mains gas sensors a, faucet, igniter, burner, furnace of thermostat with a sensor, while the automatic gas flow controller consists of a housing and is equipped with a bellows with a stem and valve installed in front of the gas valve, and the housing has a seat, while the automatic gas flow controller is made with the possibility of control the temperature of the outside air and the temperature of the gas entering the gas pipeline, and the burner is installed in an outdoor boiler with access to outside air around an automatic gas flow regulator with a bellows (see US Pat. RU No. 2331023, IPC F23N 5/06, publ. August 18, 2008).

The disadvantage of this burner is the design complexity and the inability to ensure stable operation when the gas pressure is increased to 3-4 kPa.

The objective of the invention is to develop a modulated atmospheric gas burner with a simplification of the design of the gas burner device, increasing its reliability and efficiency due to the constant automatic maintenance of the set temperature of the coolant, stable operation with increasing gas pressure up to 3-4 kPa.

The technical result, which can be obtained using the present invention, is to simplify the design, improve reliability, efficiency and stable operation with increasing gas pressure.

The technical result is achieved using a modulated atmospheric gas burner containing a gas valve, a control and regulation unit with a nozzle, temperature, flame and draft sensors, an ignition and main burner, impulse tubes, while the temperature sensor is additionally equipped with a nozzle, the temperature sensor being connected via an impulse tube with a control and regulation unit by means of a nozzle configured to provide, in cooperation with the nozzle and the control and modulation unit burning of the main burner when the temperature set by the temperature sensor is reached.

Brief Description of the Drawing

The drawing shows a modulated atmospheric gas burner, General view.

The implementation of the invention

The modulated atmospheric gas burner consists of a gas valve 1, a control and regulation unit 2, a valve 3, an ignition burner 4 with a network gas sensor 5, a flame sensor 6 with a thermobimetal plate 7, a draft sensor 8, a temperature sensor 9, and a main burner 10, while the control and regulation unit 2 has a nozzle 11, and the temperature sensor 9 is additionally equipped with a nozzle 12, and the temperature sensor 9 is connected via a pulse tube (not indicated in the drawing) to the control and regulation unit 2 by means of a nozzle 12 made about with the possibility of providing, in cooperation with the nozzle 12 and the control unit 2 of the modulation of combustion of the main burner 10 when the temperature set by the temperature sensor 9 is reached, the gas valve 1 comprises a membrane 13, a spring 14, a movable rigid center 15, a valve seat 16, moreover, all elements of a modulated atmospheric gas burner are connected by impulse tubes (not indicated in the drawing).

Modulated atmospheric gas burner operates as follows.

The modulated atmospheric gas burner is turned on and the gas valve 1 is activated as follows: the thermobimetallic plate 7 is lifted, the network gas sensor 5 is opened, the gas flows through the pulse tube to the ignition burner 4, which is then ignited after heating the thermobimetallic plate 7, the last release, the flame sensor 6 closes, the gas through the nozzle 11 enters the control and regulation unit 2 and then through the pulse tubes enters the submembrane space (in the drawing the gas valve 1, to the thrust sensors 8, flame 6, through the nozzle 12 to the temperature sensor 9, and if the thrust sensor 8, temperature sensor 9 and flame sensor 6 are closed, then pressure is created in the submembrane cavity of gas valve 1, under the influence whose gas valve 1 opens. The valve 3 is opened, the main burner 10 lights up, when the draft sensor 8, the flame sensor 6 are opened, the pressure in the submembrane cavity of the gas valve 1 disappears and the gas valve 1 closes, the main burner 10 goes out, and to start the main burner 10, it is necessary to re-ignite. When the coolant temperature approaches the level set by the temperature sensor 9, the nozzle of the latter slowly opens, gas from the control and regulation unit 2 slowly bleeds through the nozzle 12 into the ignition burner 4, the gas pressure in the control and regulation unit 2 slowly decreases, under the influence of gas pressure acting on the movable rigid center 15 associated with the membrane 13 and the spring 14, the movable rigid center 15 approaches the valve seat 16, the gas flow through the main burner 10 decreases, the coolant is cooled , the nozzle of the temperature sensor 9 slowly closes, the gas pressure in the submembrane cavity of the gas valve 1 increases and, overcoming the resistance of the spring 14, the gas pressure on the movable rigid center 15, the membrane 13 raises the movable rigid center 15 above the valve seat 16, increasing the gas flow through the gas valve 1, thereby increasing the power of the main burner 10, the process is repeated, while with a sudden increase in gas pressure in the gas pipeline to 3-4 kPa, which in practice sometimes occurs, more gas passes through gas valve 1 gas quality, the main burner 10 generates more heat, the temperature of the coolant rises, the nozzle of the temperature sensor 9 opens, the gas from the control and regulation unit 2 is vented through the nozzle 12 into the ignition burner 4, the gas pressure in the control and regulation unit 2 slowly decreases, while under the action of gas pressure acting on the movable rigid center 15 connected to the membrane 13 and the spring 14, the movable rigid center 15 approaches the valve seat 16 by a large amount, providing a constant flow d of gas through the main burner 10, and the power of the latter remains at the same level as before the increase in gas pressure, thus providing the constantly required power of a modulated atmospheric gas burner, set by the temperature sensor 9.

The invention in comparison with the prototype and other known technical solutions has the following advantages:

- simplification of the design;

- profitability and stability of work with increasing gas pressure;

- improving the quality of gas combustion;

- improving the environmental performance of the burner without complicating the design;

- automatic temperature control of the coolant;

- improving the reliability and power of the burner;

- the accuracy of the proportioning of gas and air flow when changing the power of the burner.

Claims (1)

A modulated atmospheric gas burner containing a gas valve, a control and regulation unit with a nozzle, temperature, flame and draft sensors, an ignition and main burner, pulse tubes, characterized in that the temperature sensor is additionally equipped with a nozzle, while the temperature sensor is connected via a pulse tube with a control and regulation unit by means of a nozzle configured to provide, in cooperation with the nozzle and a control and regulation unit, the modulation of combustion of the main burner at reaching the temperature set by the temperature sensor.

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