Water vapor heat exchange system and movable steam injection boiler and steam injection method thereof

A steam injection boiler and heat exchange system technology, applied in steam boilers, steam superheating, steam generation, etc., can solve the problems of acid corrosion, equipment occupation, high depreciation cost, and large diameter, so as to reduce depreciation cost and avoid low temperature corrosion , The effect of reducing the caliber requirements

CN112944312APending Publication Date: 2021-06-11KARAMAY SHENGLI PLATEAU MACHINERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-06-11

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Abstract

The invention provides a water vapor heat exchange system and a movable steam injection boiler and a steam injection method thereof. The water vapor heat exchange system comprises a water type heat exchanger located between a water pump and a boiler convection section, a flue gas heat exchanger located in the boiler convection section and a radiation section heat exchanger located in a boiler radiation section. The water type heat exchanger comprises a heat exchanger inner pipe and a heat exchanger outer pipe which exchange heat with each other and are used for water medium circulation, wherein the heat exchanger inner pipe, the flue gas heat exchanger, the heat exchanger outer pipe and the radiation section heat exchanger are sequentially communicated in the water medium circulation direction. After absorbing energy in the convection section, a water medium enters the water type heat exchanger to serve as a heat source for heating a water medium which does not enter the convection section, so that the temperature of the water medium is increased to exceed the dew point temperature, and low-temperature corrosion of flue gas to finned tubes is avoided, a flue gas outlet of the radiation section is communicated with an overheating section, a superheat section heat exchanger used for further heating and evaporating the water medium is arranged in the overheating section, wet saturated steam from the radiation section is continuously heated and evaporated through the superheat section heat exchanger, and the steam injection effect on an oil well is guaranteed.
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Description

technical field

[0001] The invention relates to the technical field of petroleum exploitation, in particular to a water vapor heat exchange system, a movable steam injection boiler and a steam injection method thereof. Background technique

[0002] The oil extraction industry is an important basis for promoting stable economic development and national defense security. Heavy oil is an important raw material for lubricating oil industry and aerospace industry. The development of heavy oil is of great significance to the energy industry. At present, the main problem of heavy oil production is the high cost. Steam injection technology is often used in heavy oil production. By injecting high-temperature steam into the oil layer, the viscosity of heavy oil can be reduced, so that crude oil can be easily recovered. Reducing the cost of steam injection needs to be solved urgently. The current technical situation of the oilfield is as follows: In the steam injection process, the st...

Examples

Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039]The purpose of the present invention is to provide a water vapor heat exchange system and its movable steam injection boiler and steam injection method, in order to solve the above technical problems, the initial water medium is preheated by using the water medium after the convection section absorbs heat In order to avoid the low-temperature corrosion of the finned tubes by the flue gas, the heat of the boiler can be fully utilized, and the operating tim...