Subcritical pressure pouring boiler furnace

Abstract

A subcritical pressure steam injection boiler, the water vapor pipeline system is composed of water pump, water supply pipe, steam discharge pipe, radiant tube bundle, convective tube bundle, steam-water separator, feed water preheater, and the radiant tube bundle is composed of multiple rows of horizontal U-shaped The convection tube bundle is formed by connecting multiple rows of U-shaped light tubes and multiple rows of U-shaped finned tubes. The feed water preheater is composed of an outer casing and an inner casing. The outer casing has a shell-side inlet and a shell-side outlet. , both ends of the inner casing have a tube-side inlet and a tube-side outlet, the shell-side inlet is connected to the water supply pipe, the shell-side outlet is connected to the inlet of the convection tube bundle, the outlet of the convection tube bundle is connected to the tube-side inlet, and the tube-side outlet is connected to the radiation tube bundle The inlet of the radiant tube bundle is connected to the steam inlet pipe of the steam-water separator, and the steam outlet pipe of the steam-water separator is connected to the steam discharge pipe. The steam injection boiler of the present invention has a simple and compact layout of the steam pipeline, stable operation, safety and reliability. , high thermal efficiency, which solves the problem of difficult mining of high-pressure deep well blocks and ultra-heavy oil blocks.

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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