Steam generator used for thickened oil exploitation

Abstract

The invention discloses a steam generator used for thickened oil exploitation. The steam generator used for thickened oil exploitation comprises a cylindrical barrel body, a dual-ring hydrocyclone, a flame tube, a water film generator and an evaporation converter, wherein the dual-ring hydrocyclone, the flame tube, the water film generator and the evaporation converter are located in the barrel body and are arranged in a coaxial mode in the gas flowing direction in sequence, an end cover provided with a fuel gas inlet connecting pipe and a forced air inlet connecting pipe is fixed at the gas inlet end of the barrel body, forced air is divided into an inner eddy current and an outer eddy current by the dual-ring hydrocyclone fixedly arranged at the position of an inlet of the flame tube, the inner eddy current and the outer eddy current enter the internal space and external space of the flame tube respectively, the forced air entering the flame tube is mixed with fuel gas and then burns to form flame currents, part of the forced air entering a ring runner between the flame tube and the barrel body enters the flame currents through a through-flow hole in the wall surface of the flame tube, most of the forced air entering the ring runner between the flame tube and the barrel body flows out through an outlet, the water film generator is composed of at least one circle of pressure water nozzles arranged on the inner wall of the barrel body, and the evaporation converter is a section of runner with the inner cavity contracting gradually at first and expanding gradually afterwards. The steam generator used for thickened oil exploitation has the advantages of being reasonable in structure, high in reliability, long in service life, saving in energy, and high in 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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