RU205176U1 - STEAM GENERATOR INJECTOR - Google Patents

Abstract

The utility model relates to the field of steam generators, in particular to steam generator injectors. The technical result achieved by the solution consists in increasing the reliability of the injector operation, ensuring high-quality mixing of the components. The specified technical result is achieved due to the fact that a steam generator injector has been developed, containing: a cylindrical metal body; inlet nozzles for introducing fuel, oxidizer and water into the mixing chamber, connected to the housing; the first mixing chamber for mixing the fuel with the oxidizer; a second mixing chamber for mixing a mixture of fuel and oxidant with water; an outlet for directing the mixture from the second chamber to the combustion chamber; characterized in that the inlet nozzles are located tangentially to the body, the points of connection with the body of the inlet nozzle for fuel injection and the inlet nozzle for introducing the oxidizer contain a plurality of holes, the first chamber and the second chamber communicate with each other through a plurality of holes, the first chamber communicates with the second chamber so so that the mixture of fuel and oxidant is supplied to the second chamber perpendicular to the direction of water supply.

Description

Technical field to which the utility model belongs

The utility model relates to the field of steam generators, in particular, to steam generator injectors.

State of the art

Known steam generator (US5758605A, publ. 02.06.1998), which discloses a method and device for generating steam, and water is supplied directly to the combustion zone, which is configured in such a way that water cannot pass through this zone. The steam generator can consist of three pipelines arranged coaxially to each other, which transport fuel, oxygen and feed water to the fuel-oxygen mixing zone and the combustion zone. Alternatively, the generator can consist of two concentric pipelines that carry water and a mixture of fuel and oxygen to the combustion zone. Steam exits the generator through a restrictor at one end of the farthest piping. In one embodiment, the combustion zone extends into a housing that communicates with and is attached to the outermost conduit. The invention provides very high thermal efficiency and very low air emissions.

However, in this solution, a different injector design is used, it proposes to use nested cylinders and does not use tangential injection channels for components.

It is known that a steam generator device is selected as a prototype (US4558743A, publ. 12/17/1985). The known steam generator is characterized in that it can be placed in a wellbore for use in secondary and tertiary hydrocarbon production. Fuel is injected axially into a combustion chamber having a reduced opening at its bottom, and oxygen is injected tangentially from a plurality of openings in the upper part of the combustion chamber to create a stable swirling flame. Part of the combustion chamber walls is formed by a porous sintered stainless steel cylinder through which water is pumped to cool the chamber walls and generate steam. Combustion products are mixed with water mist in the steam generating section to form steam.

However, in this solution, the fuel is fed axially, and not tangentially, only one mixing chamber is used.

Disclosure of a utility model

In one aspect of the invention, a steam generator injector is disclosed comprising:

- cylindrical metal body;

- inlet nozzles for introducing fuel, oxidizer and water into the mixing chamber, connected to the body;

- the first mixing chamber for mixing the fuel with the oxidizer;

- a second mixing chamber for mixing a mixture of fuel and oxidizer with water;

- outlet for directing the mixture from the second chamber to the combustion chamber;

characterized by the fact that

the inlet nozzles are located tangentially to the body, the points of connection with the body of the inlet nozzle for fuel injection and the inlet nozzle for introducing the oxidizer contain a plurality of holes,

the first chamber and the second chamber communicate with each other through a plurality of holes,

the first chamber is in communication with the second chamber so that the mixture of fuel and oxidant is supplied to the second chamber perpendicular to the direction of water supply.

In additional aspects of the invention, it is disclosed that the number of holes at the junction of the housing with the inlet pipe is selected so as to provide a stoichiometric ratio of fuel and oxidant at a given pressure of a given fuel and oxidizer; water is supplied to the second mixing chamber through a sprayer; the injector contains an attachment to the combustion chamber.

The main task of the claimed utility model being solved is to improve the reliability of the injector and ensure a high-quality mixing of fuel, oxidizer and water.

The essence of the utility model lies in the fact that in a single housing there are two chambers for mixing the components (fuel, oxidizer, water) to further create steam, in the first chamber fuel and oxidizer are mixed, in the second - the previously obtained mixture of fuel and oxidizer with water, the ratio components are set by the dimensions of the inlet holes.

The technical result achieved by the solution consists in increasing the reliability of the injector operation, ensuring high-quality mixing of the components.

Brief Description of Drawings

1 shows an exemplary embodiment of a steam generator injector.

Implementation of the utility model

Figure 1 shows an embodiment of the invention in which the chamber 1 for mixing the fuel and the oxidant is a cylinder, to which the fuel supply pipe 2 and the oxidant supply pipe 3 are connected. Through holes 4, the chamber 1 is connected to the chamber 5 for mixing the combustible mixture and water. The feed is fed into the mixing chamber through at least one water supply pipe 6.

Combustion chamber coolant approaches are well known in the art, but typically fuel, oxidant and coolant are supplied to the combustion chamber through separate nozzles, resulting in uneven distribution of components within the combustion chamber and uneven heating of parts of the combustion chamber.

The proposed solution proposes a design in which fuel, oxidant and water are premixed to ensure more uniform combustion of the mixture and heating of the combustion chamber.

The parameters of the fuel and oxidizer inlets are selected to provide a stoichiometric ratio. This is preferably achieved by selecting the diameter of the plurality of holes at the junction of the nozzle with the body. In another embodiment, this is achieved by selecting the diameters of the nozzles. The selection of the diameters of the nozzles or the diameters of the holes is carried out taking into account the pressure of the supplied fuel and oxidizer.

The presence of many holes in the joints of the nozzles and the body provides better mixing of the components in the injector.

The claimed injector of the steam generator solves the problem of high combustion temperature of the fuel due to the uniform distribution of the coolant over the combustible mixture. To ensure such a distribution, the injector design has the following features: preliminary mixing of fuel and oxidizer in the first chamber, mixing of the resulting combustible mixture with water in the second chamber, and the components are fed tangentially with respect to the cylindrical body, which provides better mixing of the components as compared to the axial one. serving.

Preferably, the injector is manufactured using rapid prototyping from a metal alloy to avoid leakage.

Operation of the proposed device

Sources of fuel, oxidizer and water are connected to the injector through the branch pipes. Methane and natural gas can be used as fuel. It is preferable to use oxygen as an oxidizing agent. Treated water is used as a cooler.

Oxidant and fuel are fed into the first cylindrical mixing chamber through tangential nozzles, mixed in it, forming a combustible mixture. Then, through the axial holes, the combustible mixture is fed into the second mixing chamber, where it is mixed with water supplied to the second chamber through the tangential pipe. Then, from the second chamber, a mixture of all three components is fed into the combustion chamber through an axial hole.

Due to this operation of the injector, uniform mixing of the components is ensured.

Utility model embodiment

In one embodiment, the injector is used for use in a downhole steam generator, made of a structurally single metal body, to which pipes for supplying water, fuel and oxidizer are connected. The fuel components are mixed inside the injector and fed to the steam generator for combustion and steam generation.

No mechanical devices are needed for mixing the components; high-quality mixing is carried out due to the design features of the injector.

The embodiments are not limited to the embodiments described herein, a person skilled in the art based on the information set forth in the description and knowledge of the prior art will become apparent and other embodiments of the utility model, which do not go beyond the essence and scope of this utility model.

Elements mentioned in the singular do not exclude the plurality of elements, unless otherwise specified. The elements of the proposed device are located in a common housing, structurally and functionally connected to each other.

While exemplary embodiments have been described in detail and shown in the accompanying drawings, it should be understood that such embodiments are illustrative only and are not intended to limit the broader utility model, and that the utility model should not be limited to the specific arrangements shown and described, and designs as various other modifications may be apparent to those skilled in the art.

Claims (4)

1. A steam generator injector, comprising: a cylindrical metal body; inlet nozzles for introducing fuel, oxidizer and water into the mixing chamber, connected to the housing; the first mixing chamber for mixing the fuel with the oxidizer; a second mixing chamber for mixing a mixture of fuel and oxidant with water; an outlet for directing the mixture from the second chamber to the combustion chamber, characterized in that the inlet pipes are located tangentially to the body, the joints with the body of the fuel inlet pipe and the oxidizer inlet pipe contain many openings, the first chamber and the second chamber communicate with each other the other, through a plurality of holes, the first chamber communicates with the second chamber so that the mixture of fuel and oxidant is fed into the second chamber perpendicular to the direction of water supply. 2. The injector according to claim 1, in which the number of holes at the junction of the housing with the inlet pipe is selected such that, at a given pressure of a given fuel and oxidizer, to provide a stoichiometric ratio of fuel and oxidizer. 3. An injector according to claim 1, wherein water is supplied to the second mixing chamber through a nebulizer. 4. The injector of claim 1, wherein the injector comprises an attachment to a combustion chamber.

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