RU209127U1 - FURNACE HEATING - Google Patents

Abstract

The technical solution relates to the field of means for heating mainly domestic premises and is a further improvement of a well-proven furnace. The task is to increase its durability, i. preservation of operational characteristics during the entire operational period. Durability is adversely affected by coking of the interior cavity of the furnace body due to problems with the removal of the resulting carbon deposits. This leads to local overheating of the body and a significant decrease in the heat transfer of the furnace. The technical result consists in increasing the durability of the furnace by reducing deposits on the inner walls of its body during its long-term operation. To do this, the heating furnace includes a combustion unit with a door, while the housing of the combustion unit consists of upper and lower half-shells having flanges with ribs conjugated along the length and in cross section on the side surfaces and a branch pipe for connecting to the chimney, and channels formed by arcuate of the same curvature by ribs on the inner surfaces of the upper and lower half-housings, the cross-section of the body is constant in height, respectively, from the upper part of the upper half-housing to the plane of connection with the lower half-housing and from the said plane to the bottom of the lower half-housing, with the possibility of forming in them along the entire height of the furnace body turbulent flows of gaseous combustion products. At the same time, the flanges of the upper and lower half-hulls are interconnected by a threaded connection and on the inside of the housing at the places where the arcuate ribs pass through them, they have cutouts in the form of channels, the upper of the half-hulls around the entire perimeter of its flange has an external protrusion facing downward, and the lower of the half-hulls is made according to along the entire perimeter of its flange with a groove in which the protrusion of the upper half-body is placed, and at the junction of the half-body along the entire perimeter there is a ceramic cord and a fire-resistant sealant. 2 w.p. f-ly. 2 ill.

Description

The technical solution relates to the field of means for heating mainly domestic premises.

Known furnace containing a furnace unit and a podzolnik with an ash box and a grate, a door, while the furnace unit consists of three parts: the upper half-body, the lower half-body and the top of the furnace with a chimney outlet pipe, and pockets or the grooves in which the refractory cord is laid, and all joints of the half-shells and the top of the furnace are additionally treated with a refractory sealant, and the furnace is equipped with a chipper tooth mounted on guides between the upper and lower parts with the ability to move along them, and the thickness of the walls of the upper half-shell, lower half-shell and the top of the furnace is 6 mm ± 1 mm, and the thickness of the upper part of the flue pipe is 10 mm ± 1 mm, and the thickness of the lower part is 12 mm ± 1 mm, and in places where stiffeners are present, the wall thickness of the half-shells is (10-12) mm ± 1 mm (RU 2737626 C1, 12/01/2020).

Known furnace containing a furnace unit, ash pan, podzolnik and a grate, characterized in that the furnace unit consists of two parts made of cast iron - the upper semi-hull with a chimney outlet and the lower semi-hull, grooves are made on the mating surfaces of the semi-hulls, in which a refractory cord is laid, and all joints of the semi-hulls are treated with a heat-resistant sealant, at least two heat-removing fins pass on the outer side of each of the semi-hulls, and the wall thickness of the furnace unit with a tolerance of ±1 mm varies from 6 mm to 12 mm, amounting to 10 mm at the side walls of the furnace unit , and in the place where the ribs are present, it is 12 mm, and the ribs are made with an equal distance from each other and from the front and rear edges of the combustion unit (RU 2738613 C1, 12/14/2020).

The closest known is a heating furnace containing a furnace unit, a ash pan with an ash box and a grate, a door, while the furnace unit consists of three parts: the upper and lower floors of the housings with arcuate ribs along the length and in cross section on the side surfaces and the top furnace with a chimney outlet pipe, moreover, pockets or grooves are made on the joined surfaces of the half-shells and the top of the furnace, in which a refractory cord is laid, and all joints of the half-shells and the top of the furnace are additionally treated with a refractory sealant, moreover, the furnace is equipped with a chipping tooth mounted on guides between the upper and lower parts with the ability to move along them (https://vezuviy.su/otopitelnoe-oborudovanie/pechi-otopitelnye/otopitelnye-pechi-seriya-triumf/ 03.03.2021).

The present technical solution is a further development of a well proven furnace. The task is to increase its durability, i. preservation of operational characteristics during the entire operational period. Durability is adversely affected by coking of the interior cavity of the furnace body due to problems with the removal of the resulting carbon deposits. This leads to local overheating of the body and a significant decrease in the heat transfer of the furnace.

The technical result consists in increasing the durability of the furnace by reducing deposits on the inner walls of its body during its long-term operation.

This is achieved by the fact that the heating furnace includes a combustion unit with a door, while the housing of the combustion unit consists of upper and lower semi-housings having flanges with ribs conjugated along the length and in cross section on the side surfaces and a branch pipe for connecting to the chimney, and the channels , formed by arcuate ribs of the same curvature on the inner surfaces of the upper and lower half-hulls, are made of a constant height of the cross-sectional body, respectively, from the upper part of the upper half-housing to the plane of connection with the lower half-housing and from the said plane to the bottom of the lower half-housing, providing the possibility of forming in them throughout the height of the furnace body of turbulent flows of gaseous combustion products. At the same time, the flanges of the upper and lower half-hulls are interconnected by a threaded connection and on the inside of the housing at the places where the arcuate ribs pass through them, they have cutouts in the form of channels, the upper of the half-hulls around the entire perimeter of its flange has an external protrusion facing downward, and the lower of the half-hulls is made according to along the entire perimeter of its flange with a groove in which the protrusion of the upper half-body is placed, and at the junction of the half-body along the entire perimeter there is a ceramic cord and a fire-resistant sealant. In addition, the upper semi-body on the inner side is made on opposite longitudinal sides with projections symmetrically located relative to the vertical axis of the branch pipe for connection with the chimney, on which a chipping tooth is laid in the form of a plate or container for heating water that is arcuate in cross section.

Significance of signs is proved by their causal relationship with the technical result. Thus, the execution of the body of the furnace unit from having flanges of the upper and lower half-housings with ribs conjugated along the length and in cross section on the side surfaces and channels formed by arcuate ribs of the same curvature on the inner surfaces of the upper and lower half-housings are made of a transverse housing of constant height sections along their entire length - ensures the formation in them along the entire height of the furnace body of ascending turbulent flows of gaseous combustion products, which prevent the deposition on the walls of the body of particles of combustion products that could reduce the thermal conductivity of the body, which affects, as noted above, including and on the durability of the cast iron furnace. To prevent a negative effect on the side surfaces of the housing created along the entire height, the flanges of the upper and lower half-hulls are interconnected by a threaded connection and on the inside of the housing at the points where arcuate ribs pass through them, they have cutouts in the form of channels. The tightness of the connection of the half-shells, which excludes the influence of a possible suction of air from the outside or the release of flue gases through leaks (which would affect the flows created in the furnace channels) a flange with a groove in which the protrusion of the upper half-body is placed, and at the junction of the half-body along the entire perimeter there is a ceramic cord and a fire-resistant sealant. Such a connection makes it possible to fully and for the entire estimated service life ensure the reliability of sealing, and, consequently, the durability of the furnace.

In FIG. 1 shows a longitudinal section along the furnace body.

In FIG. 2 - oven on legs in axonometric view with a cutout of one quarter.

The heating furnace includes a combustion unit 1 with a door 2. The body of the combustion unit consists of upper 4 and lower 5 half-shells with flanges 3 with mating ribs 6 arcuate in length and in cross section on the side surfaces and a branch pipe 7 for connection to the chimney. Channels 8, formed by arcuate ribs 6 on the inner surfaces of the upper 4 and lower 5 half-hulls, are made of a cross-sectional body of constant height, respectively, from the upper part of the upper half-housing to the plane of connection with the lower half-housing and from the said plane to the bottom of the lower half-housing. This makes it possible to form turbulent flows of gaseous combustion products in them along the entire height of the furnace body. At the same time, the flanges of the upper and lower semi-hulls are interconnected by a threaded connection and on the inside of the housing, in the places where the arcuate ribs pass through them, they have cutouts 9 in the form of channels 8. half-body is made around the entire perimeter of its flange with a groove in which the protrusion of the upper half-body is placed. At the junction of the semi-hulls, a ceramic cord and fire-resistant sealant are placed around the entire perimeter. In addition, the upper semi-body on the inner side is made on opposite longitudinal sides with projections symmetrically located relative to the vertical axis of the pipe for connection with the chimney, on which a chipper tooth is laid in the form of a plate 10 or a container 11 arcuate in cross section for heating water. The stove is mounted on legs 12 and has a burner 13.

During operation of the furnace along its length, ascending vertically directed flows of flue gases are formed near the side walls, as a rule, capturing particles falling out of them, which in other designs would be deposited on the walls of the half-shells. Since the channels 8 along the entire height of the furnace body (from the bottom of the lower half-shell to the top of the upper half-shell) also have the same curvature and do not have resistances that change the turbulent flow, including due to cutouts 9 in the shape of the channels 8, then particles do not settle and they either go for afterburning, or are removed into the chimney.

Full-scale tests of a new design stove when burning birch firewood were carried out for 24 hours of continuous operation on a sample, the half-shells of which are made of cast iron with a wall thickness of 8-12 mm and ribs of the same curvature - table 1 (conjugated in an arc) and ribs of different curvature ( with the formation of an extremum point at the junction of the ribs of the half-hulls) - table 2.

Conclusions:

1. Samples with parameters according to paragraphs. 4, 5 and 6 (Table 1) showed satisfactory results in terms of the amount of deposits on the surface of the inner walls of the semi-hull. A visual inspection showed that deposits in the form of soot, which affects the decrease in thermal conductivity, did not form in the area of the ribs, or crumbled during the operation of the furnace.

2. In samples with parameters according to paragraphs. 1-3 and 7-9 (table. 1) shedding of soot was not observed.

3. In samples with parameters according to paragraphs. 1-9 (Table 2), no deposits were observed to shed, which confirms the effect of the same curvature of the ribs on the semi-shells conjugated (without extremum points) to prevent the formation of deposits in the rib zone during long-term operation of the furnace.

4. The thickness of the walls of the semi-hull does not affect the amount of deposits on it in the area of the ribs.

Claims (3)

1. A heating furnace, including a combustion unit with a door, while the body of the combustion unit consists of having flanges of the upper and lower half-shells with ribs conjugated along the length and in cross section on the side surfaces and a branch pipe for connection to the chimney, characterized in that the channels formed by arcuate ribs of the same curvature on the inner surfaces of the upper and lower half-hulls are made of a cross-sectional body of constant height, respectively, from the upper part of the upper half-housing to the plane of connection with the lower half-housing and from the mentioned plane to the bottom of the lower half-housing with the possibility of forming in them the entire height of the furnace body of turbulent flows of gaseous combustion products. 2. The heating furnace according to claim 1, characterized in that the flanges of the upper and lower semi-hulls are interconnected by a threaded connection and on the inside of the housing in the places where arcuate ribs pass through them, they have cutouts in the form of channels, the upper of the semi-hulls along the entire perimeter of its flange has the outer protrusion facing down, and the lower of the semi-hulls is made along the entire perimeter of its flange with a groove in which the protrusion of the upper semi-housing is located, and at the junction of the semi-hulls along the entire perimeter there is a ceramic cord and a fire-resistant sealant. 3. The heating furnace according to claim 1, characterized in that the upper semi-body on the inside is made on opposite longitudinal sides with projections symmetrically located relative to the vertical axis of the pipe for connection to the chimney, on which a chipping tooth is laid in the form of an arcuate plate in cross section or containers for heating water.

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