Steam injection boiler with four return loop pipeline

Abstract

The invention relates to a steam injection boiler with a four-pass circulation pipeline. The water vapor system of the boiler consists of a dispatcher, a blender, a steam collector, a steam discharge pipe, a water supply pipe and a four-pass feed water heat exchanger. The shell pass inlet opening of the four-pass feed water heat exchanger is respectively communicated with the four water outlet openings of the dispatcher, the shell pass outlet opening of the four-pass feed water heat exchanger is respectively communicated with the inlet openings of four groups of convection pipe bundles, the outlet openings of the four groups of convection pipe bundles are respectively communicated with the tube pass inlet opening of the four-pass feed water heat exchanger, the tube pass outlet opening of the four-pass feed water heat exchanger is respectively communicated with the four water inlet openings of the blender, the four water outlet openings of the blender are respectively communicated with the inlet openings of four groups of radiation pipe bundles, the outlet openings of the four groups of radiation pipe bundles are respectively communicated with the four inlet openings of the steam collector, and the outlet openings of the steam collector are respectively communicated with the steam discharge pipe. The four sets of circulation pipelines adopt balanced arrangement which is brief and compact, the thermal efficiency is high, the rated evaporating capacity is enhanced remarkably, 100 ton high temperature steam with the pressure of 14 MPa can be output each hour, and thereby the problem that the steam auxiliary gravity drainage needs a large amount of steam is solved.

Description

technical field [0001] The invention relates to special equipment for thermally exploiting deep well heavy oil in the petroleum industry, in particular to a steam injection boiler. Background technique [0002] The steam injection boiler is the core equipment for heavy oil exploitation in the oil field. It injects the high-pressure steam into the oil well to heat the crude oil in the oil layer to reduce the viscosity of the heavy oil and increase the fluidity of the heavy oil, thereby improving the recovery of deep well heavy oil. Rate. The main problems existing in the existing steam injection boilers are: the shape and structure of each section of the boiler body are not optimally configured, the water vapor circulation pipeline is a single return, the layout of the tube bundle is redundant and not compact, the shell of the radiant section is cylindrical, and the tube The road is complicated, the volume is large, the heat loss along the way is large, the thermal efficienc...

AI Technical Summary

Problems solved by technology

The main problems existing in the existing steam injection boilers are: the shape and structure of each section of the boiler body are not optimally configured, the water vapor circulation pipeline is a single return, the layout of the tube bundle is redundant and not compact, the shell of the radiant section is cylindrical, and the tube The road is complicated, the volume is large, the heat loss along the way is large, the thermal efficiency is low, and the rated evaporation is small, which can only reach 22.5 tons / hour, but cannot reach 100 tons / hour

Images