CN2301675Y - Gas pulse burning air heating device - Google Patents

Abstract

The utility model relates to a gas pulse burning air heating device, which is an air heating device takes fume as heat medium with a pulse burning mode. The utility model comprises an air silencer, an air decoupling chamber, a conical silencing device behind the air valve, a fuel gas decoupling chamber, a fume decoupling chamber, a silencing tube, a purge tube silencing device, a heating air silencing outlet and other comprehensive measures, so noise is reduced. The utility model has flexible and convenient operation and is suitable for heating in various types of buildings, the utility model can also be used for drying, anti-freezing, dehumidification, etc. in factory buildings or products, and therefore, the utility model is a novel air heating device with high efficiency, energy-saving utilization and low pollution.

Description

Gas impulse combustion air heater

It is the air heating apparatus of heating agent that the utility model relates to a kind of flue gas that produces with gas fuel combustion.ICL is F23D, F24H.

China is used air heating apparatus at present, is heating agent with hot water, steam mainly, and this heating agent is by the boiler centralizedly supply.Because boiler adopts common continuous burning mode, its thermal efficiency is difficult to further raising, and carbon monoxide, nitrogen oxide pollute atmosphere in institute's discharged flue gas.The eighties has been developed the pulse-combustion formula abroad and has been added hot air device, U.S. Pat 4164210 pulse-combustion air heating apparatus have substituted traditional continuous burning mode with the pulsed burning, combustion intensity is increased, the thermal efficiency improves, nitrous oxides concentration reduces in the exhaust, and reduced power consumption, yet because the harmonic resonance phenomenon that deflagration phenomenon in the combustion process and pulse-combustion process produce, produce noise inevitably, particularly in civil equipment, noise especially makes us being difficult to stand, and causes the development and use of pulse combustion burner to be subjected to bigger restriction.

The purpose of this utility model is to develop and need not centralizedly supply heating agent, low noise, high efficiency gas impulse combustion air heater.

To achieve these goals, the utility model is realized by following proposal, heater is made up of air decoupling chamber, combustion gas decoupling chamber, combustion chamber and flue gas decoupling chamber and heat exchanger etc., is provided with the air valve of combustion air being introduced the combustion chamber by purging motor in the air decoupling chamber; Be provided with before the combustion gas decoupling chamber combustion gas is introduced the gas valve of combustion chamber through pressure regulator, magnetic valve; Be provided with the spark plug that above-mentioned gas is lighted in the combustion chamber; Its structural feature is: a taper type silencer is set in the outlet of the air valve in the A. air decoupling chamber, B. flue gas decoupling chamber is welded into the oval curved panel of symmetry and is formed cavity by two sheet metals, and the smoke inlet place that is provided with in the chamber is welded with the hush tube that afterbody has slit.After combustion gas was ignited in the combustion chamber, because the expansion of gas, pressure raise, and the air valve with non-return effect of setting was closed successively, open form becomes pulse-combustion with gas valve, and the flue gas that is produced by pulse-combustion is sent pressure fan to the cold air heating of heater.In order to reduce noise, be provided with silencer at the hot-air air outlet.

The noise reduction measure that the utility model adopts makes the noise of gas impulse burner reduce to 60-65db, is lower than external like product.This device exhaust gas temperature only is about 40-50 ℃, to have reduced heat loss due to exhaust gas, so its thermal efficiency is up to 90-95%.Because quoting the pulse-combustion mode adds hot-air, thereby need not centralizedly supply heating agent, low noise, high efficiency, oligosaprobic novel air heater for China has developed.Can be used for various types of constructure heatings, also can be used for factory building or product oven dry, antifreeze, dry etc.

Description of drawings:

Fig. 1. gas impulse combustion air heater structural representation

Fig. 2. taper type silencer behind the air valve

Fig. 3. flue gas decoupling chamber and hush tube thereof

Below in conjunction with accompanying drawing the utility model is elaborated.

The utility model enters mixing chamber 7, hot air outlet 8, spark plug 9, flame sensor 10, combustion chamber 11, tail pipe 12, flue gas decoupling chamber 13, cool air inlet 14, pressure fan 15, air heat exchanger 16, smoke exhaust pipe 17, smoke exhaust pipe silencer 18, gas valve 19, combustion gas decoupling chamber 20, magnetic valve 21, pressure regulator 22 compositions by purging motor 1, air decoupling chamber 2, air hose 3, air silencer 4, air valve 5, taper type silencer 6.The structure of the gas impulse combustion air heater of a 23KW as shown in Figure 1.Its course of work is as follows: purging motor 1 is introduced combustion air, through combustion air silencer 4, air decoupling chamber 2, air valve 5, silencer 6, enters mixing chamber 7; Combustion gas mixes with combustion air at mixing chamber 7 through pressure regulator 22, magnetic valve 21, combustion gas decoupling chamber 20, gas valve 19, lights flammable mixture by spark plug 9.After lighting, gas in the combustion chamber 11 expands rapidly, pressure raises, be used for air valve 5 and gas valve 19 is non-return valve, so the malleation of combustion chamber makes valve closing, combustion product drains into outdoor through tail pipe 12, flue gas decoupling chamber 13, air heat exchanger 16, smoke exhaust pipe 17, smoke exhaust pipe silencer 18.At this moment, chamber pressure descends, the negative pressure that the inertia of discharging owing to combustion gas produces, impel valve 5,19 to reopen, suck combustion gas and air once more, this flammable mixture is rekindled by the remaining flue gas of high temperature in the combustion chamber, so repeatedly carries out air-breathing, igniting, burning, exhaust, forms stable pulse-combustion process.At this moment, pressure fan 15 is started working, and air 14 enters heater by inlet, and the outside through heat exchanger 16, flue gas decoupling chamber 13, tail pipe 12, combustion chamber 11 is after export 8 and send into indoor by airduct and little hollow plate guide flow noise elimination air port of wearing.Because combustion system and be heated system and separate fully is not so can pollute room air in the warm-air drier course of work.This installs each parts and all is tightly connected, and gas leakage does not have.As meet accident extinguishing in combustion process, flame sensor 10 cuts out magnetic valve 21 by flame-out protection device, makes it out of service immediately, so this device is safe and reliable.

Air valve 5 is installed in the air decoupling chamber 2, in the outlet after air valve 5, welds a taper type silencer 6, and its structure as shown in Figure 2.A is the front view of taper type silencer among Fig. 2, and B is a side view.Frustum places in the air hose.24 is the outer warp of head of frustum, and 25 is internal diameter, and 26 is the outer warp of tail pipe, and 27 is the tail pipe internal diameter, and frustum perisporium 23 is with equidistantly evenly perforate of diameter 5mm.

Two sheet metals of flue gas decoupling chamber 13 usefulness 28,29 are welded into the oval curved panel of symmetry and form cavity, at smoke inlet 30 places, welding one hush tube 31 in cavity, afterbody one side of hush tube has slit 32, most of flue gas directly flows to the bottom downwards from flue gas decoupling chamber 13 middle parts, have only the fraction flue gas to discharge from slit 32.Thereby play erasure effect preferably.

Above-mentioned pulse-combustion formula heater, combustion air is because the noise reduction effect of the taper type silencer behind the air silencer, air decoupling chamber, air valve; Combustion gas is because the noise reduction effect of combustion gas decoupling chamber; Flue gas is because the noise reduction effect of flue gas decoupling chamber and hush tube thereof, smoke-discharging noise elimination device; Add the air outlet of hot-air because the noise reduction effect of microperforated panel diversion muffler reduces the noise of whole pulse-combustion formula heater greatly, making it to apply becomes possibility.

Claims (1)

1, a kind of gas impulse combustion air heater, comprise air decoupling chamber (2), combustion gas decoupling chamber (20), combustion chamber (11), flue gas decoupling chamber (13) and heat exchanger (16), be provided with the air valve (5) of combustion air being introduced combustion chamber (11) by purging motor (1) in the air decoupling chamber (2); The preceding gas valve (19) of combustion gas being introduced combustion chamber (11) through pressure regulator (22) magnetic valve (21) that is provided with of combustion gas decoupling chamber (20); Be provided with the spark plug (9) that above-mentioned gas is lighted in the combustion chamber (11); It is characterized in that: in the outlet of the air valve (5) in the A. air decoupling chamber (2) a taper type silencer (6) is set, B. flue gas decoupling chamber (13) is welded into the oval curved panel of symmetry and is formed cavity by two sheet metals (28), (29), and the smoke inlet (30) that is provided with in the chamber locates to weld the hush tube (31) that afterbody has slit (32).

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