Gas boiler and tail gas cooling and water outlet seal method thereof

Abstract

The invention discloses a gas boiler and a tail gas cooling and water outlet seal method thereof. The gas boiler comprises a water tank and a combustion furnace for heating water in the water tank, asmoke discharge pipe, an air inlet and a gas inlet are formed in the combustion furnace, an inner casing pipe is arranged outside the smoke discharge pipe in a sleeving manner, an outer casing pipe isarranged outside the inner casing pipe in a sleeving manner, an inner air chamber is arranged between the inner casing pipe and the tail gas discharge pipe, a spiral piece with the center line of thesmoke discharge pipe as the centre line is arranged in the inner air chamber, the spiral piece forms a spiral fuel runner in the inner air chamber, one end of the gas channel and the gas inlet are connected together, the other end of the gas channel is connected with an outlet of an air pump, the part, in the inner casing pipe, of the smoke discharge pipe is made of a heat conduction material, anouter air chamber is arranged between the outer casing pipe and the inner casing pipe, one end of the outer air chamber is connected with the air inlet, and the other end of the outer air chamber isconnected with an outlet of the air blower. The gas boiler has the advantage that the tail gas can be used for heating gas fuel to achieve tail gas heat use, and the problem that tail gas heat of an existing gas boiler is not used is solved.

Description

technical field [0001] The invention relates to a boiler, in particular to a gas-fired boiler and its tail gas heat dissipation and water outlet sealing method. Background technique [0002] Boilers used to heat hot water are divided into electric boilers, coal-fired boilers, and gas-fired boilers according to different heat sources (the fuel fed to water is heated by gas fuel combustion. The basic structure of a gas-fired boiler includes a water tank and a combustion furnace that heats the water in the water tank The combustion furnace is provided with a flue gas discharge pipe, an air inlet and a gas inlet, the water tank is provided with a water outlet, and the water outlet is sealed and connected with the water outlet pipe to discharge the water in the water tank. [0003] The existing gas-fired boilers have the following disadvantages: when the exhaust gas contains carbon monoxide due to insufficient combustion during the combustion process, the carbon monoxide cannot b...

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Problems solved by technology

[0004] The first object of the present invention is to provide a gas boiler that can use exhaust gas to heat gas fuel to realize the utilization of exhaust heat, which solves the problem that the exhaust heat of existing gas boilers is not utilized

[0005] The second object of the present invention aims at further providing a gas-fired boiler capable of removing carbon monoxide in the tail gas on the basis of the first object, which solves the problem that the existing gas-fired boilers cannot handle the carbon monoxide in the tail gas

[0006] The third purpose of the present invention is to further provide a gas-fired boiler that can plug the leak without sending it to the outlet pipe when the water outlet leaks, which solves the need to loosen the outlet pipe when the water outlet leaks in the existing gas-fired boiler to be able to reseal the problem

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