Subcritical pressure pouring boiler furnace

Abstract

The invention relates to a sub-critical pressure steam injection boiler, a steam pipeline system of which comprises a water pump, a water supply pipe, a steam discharge pipe, a radial pipe bundle, a convection pipe bundle, a steam separator and a feed water preheater; wherein the radial pipe bundle is formed by the connection of a plurality of rows of horizontal U-shaped straight pipes, the convection pipe bundle is formed by the connection of a plurality of rows of U-shaped light pipes and U-shaped finned pipes, the feed water preheater is composed of a shell and an internal sleeve pipe, the shell is provided with a shell side inlet and a shell side outlet, the two ends of the internal sleeve pipe are provided with a pipe side inlet and a pipe side outlet, the shell side inlet is communicated with the water supply pipe, the shell side outlet is communicated with the inlet of the convection pipe bundle, the outlet of the convection pipe bundle is communicated with the pipe side inlet, the pipe side outlet is communicated with the inlet of the radial pipe bundle, the outlet of the radial pipe bundle is communicated with a steam inlet pipe of the steam separator, and a steam outlet pipe of the steam separator is communicated with the steam discharge pipe. The steam injection boiler provided in the invention has the advantages of the concise and compact arrangement of the steam pipeline, the smooth operation, the safety and reliability and the high heat efficiency, and solves the problem of that the high-pressure deep-well block and the ultra thick oil block are difficult to be mined.

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 subcritical pressure steam injection boilers are: the shape and structure of each section of the boiler body are not optimally configured, the layout of the tube bundle is redundant and not compact, the pipeline is complex, the volume is large, the heat loss along the way is large, and the thermal efficiency is low. The rated evaporation is small and can only reach 11.2 tons / hour, but cannot reach 2...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a subcritical pressure steam injection boiler, which has a simple and compact water vapor pipeline layout, stable operation, safety and reliability, high thermal efficiency, and can output 22.5 tons of high-temperature steam with a pressure of 21 MPa per hour. Solved the problem of difficult mining of high-pressure deep well blocks and super-heavy oil blocks

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