Gas-fired boiler and using method thereof

Abstract

The invention discloses a gas-fired boiler and a using method thereof, and relates to the technical field of boilers. The boiler comprises a boiler body, a burner and a steel frame stand column. A combustor is installed on the boiler body, and a combustion chamber and a superheated area flue are arranged in the boiler body. Membrane type water cooling walls are arranged on the inner wall of the front side and the inner wall of the rear side of the boiler body respectively. A membrane type water cooling wall extending transversely is further arranged in the boiler body, and the membrane type water cooling wall divides the inner space of the boiler body into the combustion chamber located on the rear side and the superheated area flue located on the front side. The combustor is located at the inlet side end of the combustion chamber. A first superheater, a second superheater and a third superheater are sequentially arranged in the superheated area flue in the smoke flowing direction. Dead steam collected by a storage tank and used by a steam turbine and other ship equipment becomes superheated steam through two-stage superheating treatment of the first superheater and the second superheater, a gaseous water circulation is formed, the energy efficiency of the ship boiler is improved, the use amount of fresh water is reduced, and the water storage amount of a ship is reduced.

Description

technical field [0001] The invention belongs to the technical field of boilers, in particular to a gas boiler and its use method. Background technique [0002] Exhaust steam is superheated steam with thermal potential energy, which is converted into kinetic energy after being introduced into the steam turbine through the pipeline. 1. The high-speed flowing steam of exhausted steam drives the rotor of the steam turbine to rotate, forming mechanical energy. The steam that releases thermal potential energy is discharged from the exhaust port at the lower part of the steam turbine, which is called exhaust steam. The process code is ES, and the pressure of exhaust steam is usually in the range of 200Kp-400Kp; 2. FQ series exhaust steam recovery device is composed of exhaust steam recovery main body and conveying water pump. Usually, the exhaust steam generated in industrial production will be directly discharged outside, causing environmental pollution, and the exhaust steam it...

AI Technical Summary

Problems solved by technology

The whole equipment adopts the method of mixed superheating, all the mixed gas flows through all the superheaters, and the heating uniformity of the two kinds of vapor water at the same mixed flow rate is poor, which is not conducive to the uniform replenishment of the original water supply; at the same time, the mixed Steam passing through all superheaters will cause overall pollution, which requires overall maintenance and cleaning, and overall shutdown treatment

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