RU2796299C1 - Heat exchanger for pneumatic systems - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: devices for carrying out heat exchange processes associated with pneumatic installations, which can be used in industry, transport and other industries. The pneumatic systems heat exchanger includes a hollow cylindrical body containing a combustion zone and a working zone, while the working zone contains an inlet for a heat exchanger coil installed inside it. The coil-heat exchanger is made of a hollow pipe from a plurality of rows of U-shaped modules with an inlet and an outlet, located one above the other along the height of the working area of the hollow body. Said rows of U-shaped modules are interconnected by connecting elements to form a single pipeline system, each of the rows of U-shaped modules being rotated relative to the next row above it in one direction of rotation. The combustion zone includes at least one fuel supply nozzle, at least one air supply nozzle, and an ignition element.

EFFECT: increase in the energy efficiency of the device, reduction in energy costs, increase of the rate of heating of air in the system, with a simple and compact design.

8 cl, 30 dwg

Description

The invention relates to heat power engineering, namely to devices for carrying out heat exchange processes associated with pneumatic installations, which can be used in industry, transport, and other industries.

In modern industry, pneumatic systems are increasingly being used, which have air or gas as a working medium, which are distinguished by their environmental friendliness and sufficient efficiency.

The purpose of the proposed invention is to create a device that provides high energy efficiency and the rate of heating the air in the heat exchanger for the efficient operation of pneumatic systems.

Widely known heat exchangers, containing a housing with an inlet and outlet and placed inside the heat exchanger.

The disadvantage of this type of storage is their low energy efficiency, long time and uneven heating of the air inside the system.

From RU 2348882 U1, 03/10/2009, a radial-spiral heat exchanger is known, containing a vertical cylindrical body with nozzles for supplying and discharging heat carriers, inside which two or more blocks of heat exchange elements are installed one above the other to form a peripheral annular and central cylindrical distribution manifolds, each block formed from vertically installed heat exchange elements adjacent to each other, welded together by vertical seams and forming an annular row around the vertical axis of the body, each heat exchange element is hollow and consists of two walls welded along two horizontal sides with spacer protrusions, having a cross-sectional shape Archimedean spirals and forming in the inner cavity a radial-spiral slotted channel for one of the heat carriers, and the heat exchange elements are adjacent to each other, forming external vertical slotted channels for moving the second heat carrier in the axial direction, and the internal cavities of the spiral heat exchange elements of all blocks communicate with the peripheral and central distribution manifolds, and between adjacent blocks of heat exchange elements, horizontal partitions are installed alternately in the peripheral and central distribution manifolds, which divide each of the distribution manifolds into separate isolated cavities and, preventing the movement of the coolant flow along the distribution manifold, direct it after outflow from the internal cavities of the heat exchange elements one block into the internal cavities of the heat exchange elements of the next block.

The disadvantage of this heat exchanger is its low energy efficiency, long time and uneven heating of the air inside the heat exchange element, since the heating is carried out from top to bottom (and according to the laws of physics, heat tends to rise), while the heat exchange elements have a complex design and do not provide uniform and proper heating of the plates. In addition, the system needs an external heating source and has a complex structure.

The basis of this invention is the task of developing a design of a heat exchanger for pneumatic systems that eliminates these disadvantages.

The technical result is to increase the energy efficiency of the device, reduce energy costs, increase the rate of air heating in the system, with a simple design and compactness.

This technical result is achieved by the fact that the pneumatic systems heat exchanger includes a hollow cylindrical body containing a combustion zone and a working zone, while the working zone contains an inlet for a coil-heat exchanger installed inside it, while

the coil-heat exchanger is made of a hollow pipe from a plurality of rows of U-shaped modules with an inlet and outlet, located one above the other along the height of the working area of the hollow body, while these rows of U-shaped modules are interconnected by connecting elements to form a single pipeline system, moreover, each of the rows of U-shaped modules is rotated relative to the next row above it in one direction of rotation, and

the combustion zone includes at least one fuel supply nozzle, at least one air supply nozzle, and an ignition element.

The ignition element is made in the form of an electrode.

The hollow body in its lower part contains a pipe for blowing air.

The hollow body includes a support.

Each row of U-shaped modules includes additional U-shaped modules connected into a single common module.

On the outer surface of the rows of U-shaped modules of the coil-heat exchanger, heat-accumulating ribs are fixed.

The heat storage ribs are needle-shaped from a plurality of protruding needles.

The coil-heat exchanger is mounted on a supporting quick-detachable structure, including a central axis and a top cover-holder.

Further, the proposed invention will be discussed in detail, taking into account the illustrations, where

in fig. 1 - shows the heat exchanger of pneumatic systems, side view;

in fig. 2 - shows the heat exchanger of pneumatic systems, side view in section;

in fig. 3 - view A is presented, an enlarged fragment of the combustion zone;

in fig. 4 - a coil-heat exchanger is presented with an example of cross-sections by levels of U-shaped modules;

in fig. 5 - view B is presented, an enlarged fragment of the section along the level of the U-shaped module;

in fig. 6-29 - sections of the coil-heat exchanger by levels are presented;

in fig. 30 - shows a general view of the heat exchanger of pneumatic systems with additional U-shaped modules, in isometry;

where positions:

1 - hollow body;

2 - combustion zone;

3 - working area;

4 - inlet;

5 - coil-heat exchanger;

6 - U-shaped modules;

7 - connecting elements;

8 - fuel supply nozzle;

9 - air supply nozzle;

10 - ignition element;

11 - air intake pipe;

12 - support;

13 - central axis;

14 - top cover-holder.

The pneumatic systems heat exchanger includes a hollow body 1 of a cylindrical shape, including a combustion zone 2 and a working zone 3, while the working zone 3 contains an inlet 4 for a coil-heat exchanger 5 installed inside it.

The material of manufacture of the hollow body 1 is steel, preferably stainless heat-resistant steel, to increase the durability of the device. From the outside, as well as from the bottom and the top side, the hollow body 1 preferably comprises a heat-insulating layer, for example, a glued layer of a heat-resistant heat insulator or a layer of a heat-resistant sprayed insulation, in order to increase the energy efficiency (reduction of heat losses) of the device.

The hollow body 1 contains an inlet 4 hole for the coil-heat exchanger 5, which is joined to the corresponding end of the coil-heat exchanger 5 installed inside.

The hollow body 1 in its lower part preferably contains an air blowing pipe 11 with an adjustable damper, which provides adjustment of the degree of air supply. It is also preferable to install the hollow body 1 on a corresponding support 12, made, for example, in the form of three legs, or a support frame or otherwise.

The heat exchanger coil 5 is basically made of a hollow tube made of, for example, stainless heat-resistant steel or other materials suitable for heat transfer. The coil-heat exchanger 5 serves to pass and heat the working medium through (inside) it. The working medium inside the coil-heat exchanger 5 is heated by a heat source located in the combustion zone 2, made, for example, as a gas boiler, liquid burner, etc.

The coil-heat exchanger 5 consists of a plurality of rows of U-shaped modules 6 with roundings at the tops of the U-shaped profile for better pneumodynamic flow of the coolant. U-shaped modules 6 have inlets and outlets. These holes, as an option, can be connected with additional U-shaped modules 6 in one row, forming a single wider common module, for placement inside a wider hollow body 1. The inlet and outlet holes of the U-shaped module 6 in each row are connected between a connecting elements 7 with the formation of a single pipeline system. The connecting elements 7 connect the U-shaped modules 6 located one above the other in rows along the height of the entire working area 3 of the hollow body 1, and each of the rows of the U-shaped modules 6 is rotated relative to the next row above it in one direction of rotation. The angle of rotation is selected empirically and preferably is about 15°, but can be more or less. The angle of rotation was selected in such a way that each next row had an air space above the one above it, thereby providing a free (through) upward passage of heated air, heating, thereby, multiple rows of the coil-heat exchanger 5 at once, eliminating stagnation of cold air in unheated areas.

The coil-heat exchanger 5 is preferably mounted on a supporting quick-detachable structure, including the Central axis 13 and the upper cover-holder 14. The upper cover-holder 14 is mounted on the upper end of the hollow body 1, for example, by protruding elements. The top cover-holder 14 may additionally include stiffeners. It is also preferable to equip the central axis 13 with a hook or eye bolt for pulling up the coil-heat exchanger 5, for example, with a winch or other lifting device.

The combustion zone 2 includes at least one nozzle 8 for supplying fuel, for example gas, at least one nozzle 9 for supplying air, as well as an ignition element 10. The number of nozzles for supplying fuel 8 and air supply 9 may be different, which is due to type of fuel, size of combustion zone 2, the need for rapid warm-up, and other factors. The ignition element 10 is preferably made in the form of an electrode.

The implementation of the coil-heat exchanger 5 over the entire height of the working area 3 (with the exception of technological gaps from above / below) provides a large heating area, thereby increasing the energy efficiency of the device, reducing energy costs, and increasing the rate of heating of the working environment. The execution of each row in the form of a U-shaped module 6 (semi-snake) minimizes air stagnation around the heat exchanger coil 5, increases the heat exchange area, which also increases the energy efficiency of the device, reduces energy costs, and increases the rate of heating of the working medium to increase the pressure inside the system. The rotation of each of the rows of U-shaped modules 6 relative to the row above it in one direction of rotation also eliminates air stagnation, providing circulation of heated air between the rows, which ensures good general circulation of heated air inside the hollow body 1, which also increases the energy efficiency of the device, reduces energy costs , increases the rate of heating of the working environment.

On the outer surface of the rows of U-shaped modules 6 of the coil-heat exchanger 5, it is preferable to fix heat-dissipating ribs (not shown in the drawing). Ribs are attached by soldering, gluing or any other method. The heat-dissipating fins can also be made of a needle shape from a plurality of protruding needles installed on the surface of the heat exchanger coil 5. These heat-dissipating fins will increase the contact area of the heated air with the heat exchanger coil 5 (heat transfer increases), thereby also increasing the energy efficiency of the device, reducing energy costs, increasing the speed warming up the working environment.

Example 1

Pneumatic systems heat exchanger includes,

- a hollow body 1 of a cylindrical shape, including a combustion zone 2 and a working zone 3,

- the coil-heat exchanger 5 is mounted on a support quick-detachable structure, including the central axis 13 and the upper cover-holder 14,

- coil-heat exchanger 5 is made of an aluminum hollow pipe from a plurality of rows of U-shaped modules 6 with an inlet and outlet, located one above the other along the height of the working area 3 of the hollow body 1, while these rows of U-shaped modules 6 are interconnected by connecting elements 7 with the formation of a single pipeline system, and each of the rows of U-shaped modules 6 is rotated relative to the next row above it at an angle of about 15 ° in one direction of rotation,

- combustion zone 2 includes two nozzles 8 for fuel supply and one nozzle 9 for air supply, as well as an ignition element 10.

Example 2

Pneumatic systems heat exchanger includes,

- a hollow body 1 of a cylindrical shape, including a combustion zone 2 and a working zone 3,

- the hollow body 1 includes a support 12, and in its lower part it contains a pipe for blowing air 11,

- coil-heat exchanger 5 is made of a hollow pipe (stainless heat-resistant steel) from a plurality of rows of U-shaped modules 6 with an inlet and outlet, located one above the other along the height of the working area 3 of the hollow body 1, while these rows of U-shaped modules 6 interconnected by connecting elements 7 to form a single pipeline system, each of the rows of U-shaped modules 6 is rotated relative to the next row above it at an angle of about 22° in one direction of rotation,

- combustion zone 2 includes four nozzles 8 for fuel supply and two nozzles 9 for air supply, as well as an ignition element 10 in the form of an electrode.

- on the outer surface of the rows of U-shaped modules of the coil-heat exchanger 5, heat-accumulating needle-shaped fins are fixed.

The proposed solution provides an increase in the energy efficiency of the device, a reduction in energy costs, an increase in the rate of heating of the air in the system, with a simple design and compactness.

Claims (8)

1. The heat exchanger of pneumatic systems, characterized in that it includes a hollow cylindrical body containing a combustion zone and a working zone, while the working zone contains an inlet for a coil-heat exchanger installed inside it, while the coil-heat exchanger is made of a hollow pipe from a set rows of U-shaped modules with an inlet and outlet, located one above the other along the height of the working area of the hollow body, while these rows of U-shaped modules are interconnected by connecting elements to form a single pipeline system, and each of the rows of U-shaped modules is turned relative to the row above it in one direction of rotation, and the combustion zone includes at least one fuel supply nozzle, at least one air supply nozzle, and an ignition element. 2. Pneumatic systems heat exchanger according to claim 1, characterized in that the ignition element is made in the form of an electrode. 3. The heat exchanger of pneumatic systems according to claim 1, characterized in that the hollow body in its lower part contains a pipe for blowing air. 4. Pneumatic systems heat exchanger according to claim 1, characterized in that the hollow body includes a support. 5. Pneumatic systems heat exchanger according to claim 1, characterized in that each row of U-shaped modules includes additional U-shaped modules connected into a single common module. 6. The heat exchanger of pneumatic systems according to claim 1, characterized in that heat storage ribs are fixed on the outer surface of the rows of U-shaped modules of the coil-heat exchanger. 7. Pneumatic systems heat exchanger according to claim 6, characterized in that the heat storage fins are needle-shaped from a plurality of protruding needles. 8. The heat exchanger of pneumatic systems according to claim 1, characterized in that the coil-heat exchanger is mounted on a supporting quick-detachable structure, including a central axis and a top cover-holder.

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