A method of generating steam in a gas-pipe steam boiler and a gas-pipe steam boiler for realizing the method

Abstract

A gas tube steam boiler comprising: a heat exchange compartment (2) filled with water forming a water surface (2A), above said water surface and passing through a circle having a substantially vertical axis (10) and a roof (4) A steam headspace (8) defined by the cylindrical cylindrical wall (1), a steam outlet (6) communicating with the steam headspace (8), passing through the heat exchange compartment (2) and the steam top one or more gas pipes extending from the space (8), supplying heating gas to said gas pipes (3), for generating heat from said water by heat exchange between said gas pipes (3) and water means of steam flow on the surface, and steam flow ducts (7', 7 ") arranged in the steam headspace (8) for directing the steam flow from said water surface (2A) to said steam outlet (6) ; at least one gas duct (3) extends transversely through the duct so that the vapor flow flows in a direction transverse to the gas duct (3), preferably substantially perpendicularly, the duct being structured so that in the vapor flow More than half, preferably substantially all, of the steam in is restricted to flow along a flow path which, when projected onto the water level, has at least equal to the first point of said wall (1) and the The shortest distance between a second point of said wall (1) horizontally opposite said first point, in case said wall is cylindrical, said distance is the diameter D of said cylindrical wall.

Description

technical field [0001] The invention relates to a method for generating steam in a gas-pipe steam boiler and a gas-pipe steam boiler for implementing the method. Background technique [0002] With this method and apparatus it is important to optimize the energy transfer from the gas ducts to the water and steam to reduce the overall size of the boiler for a given energy output. Typically, preliminary design parameters include input gas temperature, exhaust temperature, and the desired maximum energy output, namely feedwater temperature, steam pressure, temperature, and mass flow. Preferably, the steam should be dry and more preferably superheated. [0003] From US 1,546,665 it is known to provide a gas tube steam boiler with baffles forming circular holes along the boiler wall whereby steam flow from the water surface is restricted to flow from the water surface to the circular holes and from there to the center Flow of steam outlet. In this configuration, most of the gen...

AI Technical Summary

Problems solved by technology

In this configuration, most of the generated steam will only pass through the gas pipe for a distance of about 1 / 2 the diameter of the gas pipe boiler, resulting in insufficient heat exchange between the gas pipe and the generated steam

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