RU2601081C1 - External boiler - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to hot water boilers production, particularly, to external accommodation boilers, and can be used in independent heating systems for heat insulation of equipment. External boiler consists of heat and waterproof housing 1, inside which three-way heat exchanger 2 with furnace (not shown) is installed, with reverse and straight lines 3 and 4, respectively, blasting burner 5 arranged coaxially with furnace, turbulence promoters 6, branch pipe 7 with chimney 8 and grate 9 for ambient air ingress, wherein three-way heat exchanger 2 third flue gas passage outer surface 10 is made without heat insulation, which enables additional heating of cold air supplied for combustion through grate 9.

EFFECT: technical result consists in additional heating of air supplied for combustion, better gas combustion with heated air, reducing gas consumption.

1 cl, 1 dwg

Description

FIELD OF THE INVENTION

The invention relates to the production of hot water boilers, in particular to outdoor boilers, and can be used in autonomous heating systems for thermal insulation of equipment.

State of the art

A well-known outdoor boiler containing a thermally insulated body with a service door, an air intake grill, a fire tube boiler placed in it, a chimney base, a hatch for cleaning soot, direct and return lines, a gas burner device, is additionally equipped with a heat-insulated panel for attaching a blast burner made with the possibility of interchangeability, and under the firebox of the fire tube boiler is made of heat-resistant materials (US Pat. RU No. 114359, IPC F24H 1/00, publ. March 20, 2012).

The disadvantage of this boiler is the lack of heating of the air entering the combustion with temperatures up to - 45 ° C in winter.

Known removable device for thermal insulation of pipeline equipment, which is a multilayer mat equipped with technological holes on its end parts, valves and fasteners, while it is additionally equipped with longitudinal sleeves made on the side parts of the mat, fasteners are made in the form of reinforced cords or ropes , one part of which is placed under the protective layer of the mat, the second is inside the longitudinal sleeves, and the valves are located above the technological holes (US Pat. RU No. 1243 59, IPC F16L 59/16, publ. 01.20.2013).

The disadvantage of this device is the lack of heating of the air entering the boiler with a temperature of up to -45 ° C during the winter period, poor-quality gas burning and its increased consumption.

The closest in technical essence and the achieved positive effect and adopted for the prototype is a shell-and-tube heat exchanger containing direct heat exchange tubes fixed in two tube sheets, which in turn are fastened to the tube medium chambers having a dividing wall, fittings for the annular medium placed on the casing and transverse partitions, while the heat exchanger is made three-way, the rows of pipes along the second stroke are located at an angle to the tube sheets, the ends of the extreme rows of which are closed lenas in the tube sheets opposite the dividing walls of the opposite chambers of the pipe medium, due to which an additional row of pipes is introduced in the space of the second stroke, while the thickness of the walls of the pipes of the pipe medium does not exceed the diameter of the heat transfer pipes, and the distance between adjacent rows of pipes in the region of the walls of the pipe medium chambers at least two distances of any adjacent rows of the tube sheet (US Pat. RU No. 45181, CL F28D 7/00, publ. 04/27/2005).

The disadvantage of this heat exchanger is the high cost of its manufacture, the fragility of the boiler heat exchangers, as well as the lack of heating of the air entering the boiler with a temperature of up to - 45 ° C in the winter, poor-quality gas burning and its increased consumption.

Disclosure of invention

The objective of the invention is to develop an outdoor boiler with additional heating of the air entering the combustion on the outer surface of the third flue gas stroke, by performing the outer surface of the third flue gas stroke without thermal insulation, which also gives better combustion of gas with heated air, reducing consumption gas.

The technical result, which can be obtained using the invention, is reduced to additional heating of the air supplied to the combustion, better combustion of gas with heated air, and reduction of gas consumption.

The technical result is achieved using an external boiler containing a thermally insulated body, inside of which there is a three-way heat exchanger with a furnace, with direct and reverse lines, a blower located coaxially with the furnace, turbulators, a pipe with a chimney, a grill for external air, the outer surface of the third flue gas three-way heat exchanger is made without thermal insulation.

Thus, the technical result is achieved due to the fact that the outer surface of the third stroke of the flue gases of the three-way heat exchanger is made without warm insulation.

Brief Description of the Drawings

The drawing shows the boiler outdoor placement, General view.

The implementation of the invention

The outdoor boiler consists of a thermally insulated casing 1, inside of which there is a three-way heat exchanger 2 with a furnace (not shown), with reverse and straight lines 3 and 4, respectively, while the three-way heat exchanger 2 contains a blast burner 5 located coaxially with the furnace, turbulators 6, the pipe 7, on which the chimney 8 is mounted, and the grill 9 for external air, while the outer surface 10 of the third course of the flue gases of the three-way heat exchanger 2 is made without thermal insulation, which gives the possibility of additional heating of cold air entering the combustion through the grill 9, which falls down the thermally insulated casing 1, is in contact with the non-insulated surface 10 and is heated, which also gives better combustion of gas with heated air and a decrease in gas consumption.

The outdoor boiler operates as follows.

A blow burner 5 in a three-way heat exchanger 2 installed inside a thermally insulated housing 1 generates heat, flue gases wash the heating surfaces of the three-way heat exchanger 2, wash the turbulators 6 and, in a third way, through the chimney 7 are removed into the chimney 8, while the combustion air enters through grille 9 for external air, the coolant enters the three-way heat exchanger 2 through the return line 3 from the heating system (not shown), is heated by flue gases and in a straight line 4 n it is fed into the heating system, while the outside air, which has a temperature of -45 ° C in winter, enters through the grill 9 for the intake of outside air, goes down the heat-insulated housing 1, comes into contact with the uninsulated surface 10 of the third course of the flue gases of the three-way heat exchanger 2, is heated , rises up, mixes in the upper part of the grill 9 for incoming air with cold outside air and, in a heated form, enters the fan (not shown) of the blower burner 5, where after mixing It is supplied with gas and ensures high-quality combustion of gas, while the efficiency of the boiler increases, since the temperature of the exhaust flue gases is used.

The invention in comparison with the prototype and other known technical solutions has the following advantages:

- additional heating of the air entering the combustion;

- high-quality combustion of gas with heated air;

- reduction in gas consumption;

- increase the durability of the outdoor boiler to the life of the boiler, that is, up to 15 years;

- providing chimney draft during the start-up and operation of the boiler;

- cheaper heat production;

- improving the reliability of the boiler;

- fuel economy by 15-20%.

Claims (1)

An outdoor boiler comprising a thermo-insulated casing, inside of which there is a three-way heat exchanger with a furnace, with direct and reverse lines, a blower located coaxially with the furnace, turbulators, a pipe with a chimney, a grill for external air, characterized in that the outer surface of the third the flue gas passage of the three-way heat exchanger is made without thermal insulation.

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