Boiler for preparing too-hot steam through naturally-circulating high-salt water supply and producing method thereof

Abstract

The invention discloses a boiler for preparing too-hot steam through naturally-circulating high-salt water supply and a producing method thereof, and belongs to the technical field of boiler equipment. A steam washing device is fixed in a boiler drum; the inlet of the boiler drum is connected with a high-salt softened water coal economizer by a pipeline, the inlet of the steam washing device in the boiler drum is connected with a low-salt boiler water supply coal economizer by a pipeline, and the outlet of the steam washing device is communicated with the boiler drum; the lower part of the boiler drum is communicated with a drop pipe; the lower end of the drop pipe is connected with an inlet of a distribution header; the outlet of the distribution header is connected with a rising heated pipe; the other end of the rising heated pipe is connected with a steam mixture inlet of a steam-water separator in the boiler drum; a saturated steam outlet of the steam washing device is communicated with a corrugated plate in the boiler drum; a steam outlet is fixed in the top of the boiler drum. The boiler and the producing method thereof have the beneficial effects that salt in the steam can be effectively removed through leading a small quantity of low-salt boiler supply water into the steam washing device, and the amount of low-salt boiler supply water only accounts for 10-40% of the amount of total water.

Description

Technical field [0001] The invention relates to a boiler for preparing superheated steam from natural circulation high-salt feedwater and a production method thereof, belonging to the technical field of boiler equipment. Background technique [0002] At present, in order to increase the temperature of heavy oil and reduce its viscosity, so that the heavy oil can be easily recovered from the oil layer, the method of injecting high temperature and high pressure water vapor into the oil layer is the main measure of heavy oil production. The exploitation of heavy oil is accompanied by a large amount of heavy oil produced water. The salt content of heavy oil produced water is high. After moderate treatment, the salinity still exceeds 3000mg / L, and the salt content is much higher than the requirements of the boiler feed water quality standard GB / T12145. It belongs to water with high salt content. Oilfield steam injection boiler is a special equipment for steam injection and thermal re...

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Problems solved by technology

It is not suitable to heat the steam to generate superheated steam, so it is difficult to further improve the parameters of the steam injected into the oil layer, which limits the efficiency of heavy oil recovery

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