RU2638103C1 - Outdoor boiler - Google Patents

Abstract

FIELD: heating system.

SUBSTANCE: outdoor boiler comprises a heat-water-resistant body 1 within the framework of which there is a flue heat exchanger 2 with a furnace unit 3. The flue heat exchanger 2 comprises a blasting burner 4, a chimney raft 5, feed 6 and return 7 lines respectively, and the furnace unit 3 internal surface is coated with the refractory ceramic fiber 8. The boiler is fitted with the impact plate 9 of a size no greater than 1/2 of a furnace unit cross section. The furnace unit is insulated by the refractory ceramic fiber and is mounted on the top 1/3 part of the furnace unit 3.

EFFECT: increasing the path length of the gas flame before the contact with flue heat exchanger with full reburning.

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 with forced and natural circulation of the coolant.

State of the art

Known condensation boiler for outdoor use, containing a thermally insulated body with a gas burner inside, a heat exchanger of the boiler with direct and return lines, a chimney, a direct and return line of the building heating system, characterized in that it is additionally equipped with a heat exchanger of the condensate part of the boiler and a circulation pump, the heat exchanger of the condensate part of the boiler is located in the lower part of the chimney of the boiler and connected to the return line of the building heating system and the return line excluding, and the circulation pump is installed in the return line of the building heating system with the possibility of forced circulation of the coolant, and in parallel the heat exchanger of the condensate part of the boiler is connected to the direct and return lines of the boiler through non-return valves with normally open passage with the possibility of natural circulation in the two heat exchangers of the boiler when stop the circulation pump (see US Pat. RU No. 2440538, IPC F24H 1/00, publ. January 20, 2012).

The disadvantage of this boiler is the high cost of heat production and low power.

A well-known outdoor boiler comprising a thermo-insulated casing with a fire tube heat exchanger of a boiler with a furnace, a direct and return line, a blow torch, a grill for external air, the fire tube heat exchanger is made two-way and is installed horizontally with a coaxially located blow torch inside the heat-insulated casing ( see Pat. RU No. 155744, CL F24H 1/22, publ. 20.10.2015).

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

A well-known outdoor boiler comprising a thermo-insulated casing with a fire tube heat exchanger of a boiler with a furnace, a direct and return line, a blow torch, a grill for external air, and the fire tube heat exchanger is made three-way and is installed horizontally with a coaxially located blow torch inside the heat-insulated casing ( see Pat. RU No. 158958, IPC F24H 1/22, publ. 01.20.2016).

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 by the author for the prototype is an outdoor boiler containing a thermally insulated body, inside which there is a vertical tube heat exchanger with direct and reverse lines, a chimney base, with a lid for cleaning soot, and a vertical tube heat exchanger by means of a branch pipe it is connected to the base of the chimney and contains a blast burner, a firebox, and the metal surface of the fire tube is vertical of the heat exchanger is additionally equipped with a protective plate installed in the furnace opposite the blast burner, while the protective plate is made of refractory ceramic fiber, for example, according to STO 05802307-1-012-2010, withstanding temperatures up to 1425 ° C, also the thermally insulated body is equipped with a grate for air intake for combustion (see Pat. RU No. 142278, IPC F24H 1/00, publ. 06/27/2014).

The disadvantage of this boiler is the inability to increase the boiler capacity, because, due to the small diameter of the furnace, the gas torch, reflected from the refractory lining made of ceramic refractory fiber, comes into contact with the uninsulated part of the furnace, cools, part of the gas does not burn out, and an increased CO content is formed.

Disclosure of invention

The objective of the invention is the development of an outdoor boiler with an increase in the path length of the gas flame to contact with the fire tube heat exchanger with complete afterburning of gas.

The technical result, which can be obtained using the present invention, is to increase the path length of the gas flare to contact with the fire tube heat exchanger with complete afterburning of gas.

сечения топки, изолированной огнеупорным керамическим волокном и установленной в верхней 1/3 части топки, а вся металлическая поверхность топки дополнительно также изолирована керамическим огнеупорным волокном.The technical result is achieved using an outdoor boiler containing a thermally insulated body with a fire tube heat exchanger of the boiler placed in it with a fire chamber with direct and reverse lines, a chimney base, a blast burner, and it is additionally equipped with a reflective plate no larger than

sections of the furnace insulated with refractory ceramic fiber and installed in the upper 1/3 of the furnace, and the entire metal surface of the furnace is also insulated with ceramic refractory fiber.

сечения топки, изолированной огнеупорным керамическим волокном и установленной в верхней 1/3 части топки, обтекая которую, газовый факел удлиняет свой путь до встречи с охлаждаемым жаротрубным теплообменником, газ полностью сгорает, содержание СО находится в допустимых пределах.Thus, the technical result is achieved due to the fact that the metal surface of the furnace of the fire tube heat exchanger is completely insulated with ceramic refractory fiber, while it is equipped with a reflective plate no larger than

cross-section of the furnace, insulated with refractory ceramic fiber and installed in the upper 1/3 of the furnace, flowing around which, the gas torch lengthens its path to meet with a cooled fire tube heat exchanger, the gas completely burns out, the CO content is within acceptable limits.

Brief Description of the Drawings

In FIG. outdoor boiler, general view.

The implementation of the invention

сечения топки, изолированной огнеупорным керамическим волокном и установленной в верхней 1/3 части топки 3, обтекая которую, газовый факел удлиняет свой путь до встречи с охлаждаемым жаротрубным теплообменником 2.The outdoor boiler consists of a thermally insulated housing 1, inside which a fire-tube heat exchanger 2 with a furnace 3 is installed, while the fire-tube heat exchanger 2 contains a blast burner 4, a chimney base 5, direct and return lines 6 and 7, respectively, and the inner surface of the furnace 3 is covered with fireproof ceramic fiber 8, while it is equipped with a reflective plate 9 no larger than

sections of the furnace, insulated with refractory ceramic fiber and installed in the upper 1/3 of the furnace 3, flowing over which, the gas torch lengthens its path to meet with the cooled fire tube heat exchanger 2.

The outdoor boiler operates as follows.

сечения топки 3, изолированной огнеупорным керамическим волокном и установленной в верхней 1/3 части топки 3, выявленной опытным путем, касается противоположной стенки топки 3 и только после этого соприкасается с охлаждаемым жаротрубным теплообменником 2, омыв жаротрубный теплообменник 2, отработанные дымовые газы поступают в основание дымовой трубы 5 и далее в атмосферу. Газ полностью сгорает, содержание СО находится в допустимых пределах.The blast burner 4 in the fire-tube heat exchanger 2 installed inside the heat-insulated casing 1 generates heat, the latter is captured by the fire-tube heat exchanger 2 and sent to the heating system in a straight line 6, the cooled coolant is returned to the fire-tube heat exchanger 2 in the return line 7, the gas torch of the burner burner 4 is washed the furnace 3, covered with refractory ceramic fiber 8, is reflected by the plate 9 with the size determined experimentally, not more than

cross-section of the furnace 3, insulated with refractory ceramic fiber and installed in the upper 1/3 of the furnace 3, which has been experimentally determined, touches the opposite wall of the furnace 3 and only then comes into contact with the cooled fire tube heat exchanger 2, washing the fire tube heat exchanger 2, exhaust flue gases enter the base chimney 5 and further into the atmosphere. The gas burns out completely, the CO content is within acceptable limits.

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

- an increase in the path length of the gas flare to contact with the fire tube heat exchanger with complete afterburning of gas;

- 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 containing a thermally insulated body with a fire tube heat exchanger of the boiler with a fire chamber with direct and return lines, a chimney base, a blast burner, characterized in that it is additionally equipped with a reflective plate with a size of no more than 1/2 of the cross section of the fire chamber, insulated with ceramic refractory fiber and installed in the upper 1/3 of the furnace, and the entire metal surface of the furnace is also additionally insulated with ceramic refractory fiber.

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