RU188433U1 - HEAT EXCHANGER FOR BOILER - Google Patents

Abstract

The utility model relates to heat engineering and can be used in boiler installations. The technical result of the proposed utility model is to improve energy efficiency and compactness, ease of installation and maintenance. The technical result is achieved by the fact that a heat exchanger for a boiler containing at least one concentric pipe channel of a tiptube in a pipe (flue gases are removed through the internal pipes of heat exchangers) is characterized by the fact that it contains three collectors (with parallel pipe plates), between the first and second collectors at least one heat exchanger of the “pipe in pipe” type with an open gas passage inside the central pipe, heat exchange (single) pipes are located between the first and the third collector, and the third collector Op is made with a central hole. The first collector may be provided with a central hole coaxially with a hole in the third collector. The central opening of the first and second collectors may be rectangular. The distance between the first and second collectors may be greater than the distance between the first and third collectors, and between the second and third collectors there may be a connecting pipe. Between the tubes of the heat exchanger of the type "pipe in pipe" can be located coil. The claimed design and technical solution can be successfully used for the manufacture of heating boilers.4. f-ly, 5 ill.

Description

The utility model relates to heat engineering and can be used in boiler installations.

The closest technical solution is “A SOLID FUEL BURNING METHOD AND A WATER BOILER FOR ITS IMPLEMENTATION” RU 2543922 [2], which includes a combustion chamber, a system with heat carrier, the lateral surface of the combustion chamber is formed by pipe-in-tube heat exchangers of the “pipe in pipe” type with gaps between the heat exchangers in the heat exchangers in a heat exchanger of a pipe in a tube with gaps between heat exchangers. liquid coolant, and the flue gases are discharged through the internal tubes of heat exchangers.

The disadvantage is low energy efficiency and low compactness of the device, as well as the inconvenience of installation and maintenance.

The technical result of the proposed utility model is to improve energy efficiency and compactness, ease of installation and maintenance.

The technical result is achieved by the fact that the heat exchanger for the boiler, containing at least one concentric pipe channel of the "pipe in pipe" type, with an open passage of gas inside the central pipe (flue gases are discharged through the internal pipes of the heat exchangers), is characterized by the fact that it additionally contains two collectors ( with parallel tube plates), the first and second, the first collector is located above the second, heat exchange tubes are located between the first and second collectors, the first collector is made with a central opening Tium, the annulus of the concentric tube channel is connected to the first collector.

The heat exchanger may additionally contain a third collector that connects the internal cavities of the concentric tube channels (of the type “pipe in pipe”) located opposite to the ends connected by the internal cavities with the first collector. The presence of the third collector will allow connecting several heat exchangers of the “pipe in pipe” type in parallel, which will allow to increase the heat exchange area and increase the efficiency of the heat exchanger.

The central opening of the first collector may have a rectangular shape, which will simplify the production technology.

The distance between the first and second collectors may be less than the distance between the first and third collectors, and between the second and third collectors there may be a connecting pipe, which will reduce the hydraulic resistance of the coolant and further increase the efficiency of the device.

Between the pipes of the heat exchanger of the “pipe in pipe” type a coil can be placed, which will allow to organize the heating of water for household and household needs.

The heat exchanger for the boiler is shown in: FIG. 1 is a general view with one concentric tube channel and a coil; FIG. 2 shows a general view with two concentric pipe channels with a third collector and a connecting pipe; FIG. 3 shows a general view with the third concentric tube channels of the third collector and the connecting tube, FIG. 4 - boiler with the proposed heat exchanger, where:

1 - concentric tube channel type "pipe in pipe";

2 - the first collector;

3 - the third collector;

4 - second collector;

5 - heat exchange tubes;

6 - the central hole in the first collector;

7 - connecting pipe;

8 - coil;

9 - inlet;

10 - outlet;

11 - the direction of flow of the coolant;

12 - the direction of flow of flue gases;

13 - bunker;

14 - grate;

15 - door;

16 - flue gas box.

The device operates as follows: a “pipe in pipe” 1 concentric pipe channel is located between the first collector 2 and the third collector 3. Heat exchange pipes 5 are located between the first collector and the second collector 4, the first collector is located above the second, the annular space of the concentric pipe channel is connected with the first collector. In the first heat exchanger there is a rectangular central opening 6. A connecting pipe 7 is located between the second and third collectors. Inside the concentric pipe channel is located a coil 8 for heating water for household and household needs. Inlet 9 and outlet 10 are connected to the second and third collectors, respectively.

When the boiler is operating, fuel from the hopper 13 enters the grate 14. Unburned solid fuel residues are removed through the door 15. Hot flue gases 12 pass through the heat exchanger into the flue gas box 16 for removal through a pipe (not shown). The flue gases 12 pass

between the heat exchange pipes, pass along the outer surface of the concentric pipe channel of the "pipe in pipe" type, change direction in the lower part of the boiler, passing through the inner surface of the concentric pipe channel. The coolant 11 enters the third collector, enters through the connecting pipe into the second collector, passes through a concentric pipe channel of the "pipe in pipe" type, through heat exchange pipes, collects in the first collector, enters the outlet. Increased compactness is achieved by an optimal scheme for the passage of flue gases through a heat exchanger. Improving the ease of installation and maintenance is achieved by the possibility of manufacturing and mounting the heat exchanger separately from the furnace, which will allow you to install the heat exchanger separately from the boiler body.

The technical result is an increase in energy efficiency achieved by the presence of heat exchange tubes between the first and second collectors, which leads to an increase in the total heat exchange area, which reduces the temperature difference between the outgoing flue gases and the heat carrier.

Industrial Applicability. The claimed design and technical solution can be successfully used for the manufacture of heating boilers.

Claims (5)

1. A heat exchanger for a boiler containing at least one concentric pipe channel of the "pipe in pipe" type with an open gas passage inside the central pipe, characterized in that it additionally contains two collectors, the first and the second, the first collector is located above the second, between the first and second collectors heat exchange tubes are located, the first collector is made with a central hole, the annular cavity cavity of the concentric tube channel is connected to the first collector. 2. The heat exchanger according to claim 1, characterized in that it further comprises a third collector connecting the internal cavities of the concentric tube channels located opposite to the ends connected by the internal cavities with the first collector. 3. The heat exchanger according to claim 1, characterized in that the central opening of the first collector has the shape of a rectangle. 4. The heat exchanger according to claim 2, characterized in that the distance between the first and second collector is less than the distance between the first and third collector, and between the second and third collector is a connecting pipe. 5. The heat exchanger according to claim 1, characterized in that a coil is located inside a concentric tube channel of the "pipe in pipe" type.

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