Steam Generator Used in Petroleum Heavy Oil Exploitation

Abstract

The invention discloses a steam generator for the exploitation of heavy petroleum oil, which comprises a cylindrical cylinder body, a double-ring cyclone arranged coaxially in the cylinder body along the direction of gas flow, a flame cylinder, a water film generator and The evaporative converter, the end cover with the gas inlet pipe and the pressure air inlet pipe is fixed on the inlet end of the cylinder, and the pressure air is divided into internal and external vortices by the double-ring cyclone fixed at the entrance of the flame cylinder, and enters the flame cylinder respectively In the inner and outer spaces, the compressed air entering the flame tube and the gas are mixed and burned to form a flame flow. Part of the compressed air entering the annular flow channel between the flame tube and the cylinder body enters the flame flow through the through hole on the wall of the flame tube, and most of it It flows out from the outlet; the water film generator is composed of at least one ring of pressure water nozzles arranged on the inner wall of the cylinder; the evaporation converter is a section of flow channel whose inner cavity first tapers and then gradually expands. The invention has the characteristics of reasonable structure, strong reliability, long service life, energy saving and high efficiency.

Description

technical field [0001] The present invention relates to heavy oil recovery technology in petroleum production, more specifically, relates to a steam generator used for heavy petroleum production. Background technique [0002] The heavy oil exploitation in petroleum exploitation is mainly thermal exploitation at present, and there are two main methods of thermal exploitation: steam huff and puff and steam drive. Both of these methods require the construction of steam station boilers on the ground, and the high-temperature and high-pressure steam is input into the underground through pipelines to extract high-viscosity underground oil. The main disadvantages of these two methods are: [0003] 1. Large heat loss. Its heat loss mainly includes: the heat loss from the steam station boiler and chimney discharge accounts for about 20%, the heat loss from the steam station to the wellhead accounts for about 3%-20% (13% on average), and the heat loss from the wellhead to the oil la...

AI Technical Summary

Problems solved by technology

Therefore, the traditional steam stimulation and steam driving methods have great limitations on the recovery of heavy oil

[0004] 2. Long mining cycle

The cycle of a boring well of the steam stimulation method is usually about 2 to 7 days, and the entire production cycle is about 15 days, and continuous production is not possible, and repeated steam injection is required, so the production efficiency is not high; although steam driving can be used for continuous mining, But the cycle of injecting steam is still longer

[0005] 3. Poor mobility of the whole device

The installation of the steam station boiler needs to build an installation foundation on the ground. Once the steam station boiler is established, it cannot be moved, so it is difficult to meet the requirements of decentralized operations in oil wells

[0006] 4. Serious environmental pollution

Since the heat-insulating bushing is directly scoured by high-temperature flames, the material properties must be very high to ensure normal combustion at a temperature level of about 2000°C, and there is cooling water outside the bushing, which makes the thermal stress level very high and affects the equipment. Life has a great impact, cooling water is easy to scale at high temperature, block the water channel, and easily cause equipment failure

The atomization area of ​​the equipment adopts a small hole structure, the flow field resistance is large, and the flow loss is relatively high

[0010] The patent document with the publication number CH102268984A discloses an atomizing device for a composite heat carrier generator. The combustion chamber of the device is still in the boiler combustion mode in essence, and the head of the combustion chamber adopts a heat-insulating bushing and a heat-insulating bushing is used between the bushings. Cooling is carried out by passing cooling water, and the thermal stress of the equipment is large during operation, which affects the service life of the equipment

In addition, its cooling method determines that the flame temperature cannot be too high, and the combustion reaction speed is also limited, that is, its thermal efficiency will not be too high

This device improves the fuel atomizer, but the structure is too complicated

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