RU2698949C1 - Mixing head of slot-type steam and gas generator - Google Patents

Abstract

FIELD: fuel supply devices.

SUBSTANCE: use: for mixture formation of fuel components. Summary of invention consists in the fact that with mixing head of slot-type steam-gas generator includes housing with installed in it mixing elements for supply of fuel components and steam forming liquid, at that, housing is made consisting of several hollow shells with one bottom, successively installed one after another with formation of closed cavities for supply of fuel components and steam forming liquid, wherein said mixing elements are made in the form of several coaxially installed pipes of different diameter and different length, input parts of which are installed in hollow shells bottoms, wherein pipes of larger diameter and smaller length form peripheral part of each mixing element, and pipes of smaller diameter and longer length form its central part, wherein on the surface of the pipes there are helical ribs, wherein the outlet parts of the pipes are attached to each other with formation of channels for supply of fuel components and steam forming liquid into the combustion chamber, wherein the first and second fuel components chambers are monotonously alternating between each other, wherein the steam-generating liquid supply cavities are located in the central and in the peripheral parts of the mixing head.

EFFECT: technical result is improved fuel mixture formation.

1 cl, 1 dwg

Description

The invention relates to heat exchange technology and can be used to create heat exchangers.

Known heat exchanger containing a housing consisting of an outer and inner wall mounted coaxially with an annular gap and forming a cavity for the working fluid, inlet and outlet manifolds with nozzles, heat exchange elements made in the form of two-layer cylindrical shells connected to each other and the housing using pylons installed on the ends of the heat-exchange elements, while in the pylons channels are made for the supply and removal of the working fluid (RF patent No. 2569990, Application No.: 2014149786/06 dated 12/09/2014, IPC: F28D 7/10).

The proposed heat exchanger operates as follows. Heat carrier is supplied to the internal cavity of the heat exchanger. The coolant is evenly distributed in the cavity of the heat exchanger and moves in the annular gaps located between the heat exchange elements and the inner wall of the housing. The working fluid through the inlet pipe enters the inlet manifold and then into the annular gap located between the outer wall and the inner wall of the housing. In the annular gap, the working fluid is divided into two streams. The first flow of the working fluid passes in an annular gap between the outer wall and the inner wall of the housing, heats up and is diverted to the outlet manifold. The second flow of the working fluid flows through the pylons into the annular gaps located between the walls of the heat exchange elements. Passing through the annular gaps, the working fluid is heated, after which the flow of the pylons enters the outlet manifold. In the discharge manifold, two flows of the working fluid are mixed together. The working fluid exits the outlet manifold through the outlet pipe.

The main disadvantages are the design complexity, significant overall dimensions due to significant structural gaps between the ring heat exchange elements, uneven heating of the shells caused by the sequence of passage of the coolant from the peripheral shell to the central one, which ultimately reduces the efficiency of the heat exchanger.

The objective of the invention is to remedy these disadvantages, improve technical characteristics and expand the functionality of a slotted steam and gas generator.

The solution to this problem is achieved by the fact that in the proposed mixing head of a slotted steam and gas generator, comprising a housing with mixing elements installed therein for supplying fuel components and vaporizing liquid, according to the invention, the housing is made up of several hollow shells with one bottom, sequentially installed one after another with the formation of closed cavities for the supply of fuel components and vaporizing liquid, while the said mixing elements are made in the form of several axially installed pipes of different diameters and different lengths, the inlet parts of which are installed in the hollow shell shells, the pipes of larger diameter and shorter length form the peripheral part of each mixing element, and pipes of smaller diameter and larger length form its central part, and on the surface of the pipes are made screw ribs, while the output parts of the pipes are fastened together with the formation of channels for supplying fuel components and vaporizing liquid to the combustion chamber, the cavities of the first and second mponentov fuel monotonically alternate with each other, wherein the cavity evaporative liquid feed located in the central and peripheral parts of the mixing head.

The invention is illustrated by drawings, where in FIG. 1 shows a General view of the mixing head of a slotted steam and gas generator.

The mixing head of the slotted steam and gas generator comprises a housing 1 made of several hollow shells 2 with one bottom 3, sequentially installed one after another with the formation of closed cavities 4 for supplying fuel components and vaporizing liquid. The mixing elements 5 are made in the form of several coaxially mounted pipes 6 of different diameters and different lengths, the input parts of which are installed in the bottoms of the hollow shells 2, and the output parts are fastened together in the same plane and form the firing head of the mixing head. Pipes of larger diameter and shorter length form the peripheral part of each mixing element 5, and pipes of smaller diameter and larger length form its central part. The outlet parts of the pipes 6 are fastened together with the formation of channels 7 and 8 for supplying fuel components and vaporizing liquid, respectively, to the combustion chamber. The cavities of the first 9 and second 10 fuel components are monotonously alternating with each other, while the supply cavity 11 of the vaporizing liquid is located in the central and peripheral parts of the mixing head. On the surface of the pipes 6 made screw ribs 12.

The proposed mixing head slotted steam and gas generator operates as follows.

The fuel components are fed from the respective cavities 4 formed by the hollow shells 2 into the mixing elements 5 formed by annular gaps between the coaxially mounted pipes 6 of different diameters and different lengths, the input parts of which are installed in the bottoms of the hollow shells 2, and the output are located in the same plane. The components enter the combustion chamber in the form of hollow jets, while the jet of one fuel component interacts with the jet of another fuel component along the outer and inner surfaces, which allows for improved mixture formation due to the absence of a central part of the jet of fuel components and a decrease in the characteristic transverse size of the jet.

The vapor-forming liquid is fed into the supply cavity 11, and from it, through the annular channels between the coaxially mounted pipes 6, into the cavity of the combustion chamber, where the combustion of the fuel components takes place. The vapor-forming liquid, due to the high temperature of combustion of the fuel components, turns into high-temperature steam, and, together with the products of combustion of the fuel components, is supplied for further use.

The location of the supply cavity 11 of the vaporizing liquid in the peripheral part of the mixing head will protect, due to the formation of a steam curtain, the fire wall of the combustion chamber from high heat fluxes arising from the combustion of fuel components.

The execution on the surface of the pipes 6 of the screw ribs 12, will ensure the supply of fuel components and vaporizing liquid into the combustion chamber in the form of rotating cones, which will ensure the required conditions of mixture formation.

Such an effect on the component flows and their conversion into hollow annular jets makes it possible to reduce the transverse characteristic size and increase the heat transfer area, which, ultimately, will increase the overall efficiency of the entire steam and gas generator as a whole.

Using the proposed technical solution will improve the technical characteristics and expand the functionality of the gas generator.

Claims (1)

A mixing head of a slotted steam and gas generator, comprising a housing with mixing elements installed therein for supplying fuel components and a vaporizing liquid, characterized in that the housing is made up of several hollow shells with one bottom, sequentially installed one after another with the formation of closed cavities for supplying fuel components and vapor-forming liquid, while the said mixing elements are made in the form of several coaxially installed pipes of different diameters and different lengths, the input parts of which are installed in the bottoms of the hollow shells, with pipes of a larger diameter and a shorter length form the peripheral part of each mixing element, and pipes of a smaller diameter and a larger length form its central part, and screw ribs are made on the surface of the pipes, while the pipe outlet parts bonded to each other with the formation of channels for supplying fuel components and vaporizing liquid to the combustion chamber, and the cavities of the first and second fuel components monotonously alternate with each other, when this cavity supply vaporizing liquid located in the Central and in the peripheral parts of the mixing head.

Images