SK8590Y1 - Chimney flue gas heat exchanger - Google Patents

Abstract

The chimney flue gas heat exchanger is formed by a heat exchanger pipe (1). The ribs (4) are vertically attached to the exchanger pipe (1) and the flanges (2) with the spacers (6) are firmly slip on and fixed thereon. These define the position of the shell (3) with fixed horizontal air vents (5).

Description

Otáasť techniky

Technicians® solutions are concerned with economical space heating in industry, but especially in households, making maximum use of fuel potential and combustion chambers with combustion chambers.

BACKGROUND OF THE INVENTION

The pursuit of economic heating of households and workplaces motivates people to find the best way to maximize the potential of combustion plants. Nor do producers of low-power fireplaces or boilers firing solid fuel are lagging behind. They offer more or less good solutions to exploit the heat losses that have occurred so far.

The heat losses arising from combustion are divided into 3 parts:

a) Chimney loss - depends on the temperature of the flue gases leaving the chimney. This loss is high in the combustion chambers. at fireplaces, sometimes reaching up to. more than 500 ° C - depending on its type.

b) Loss of non-combustion of gaseous parts - This loss is caused by the escape of unburned combustible gases released from the wood out of the chimney. This loss can be high or low and depends mainly on the amount and manner of air supply in the insert needed to completely burn the wood. Sufficient air must be supplied for perfect wood burning: at least 4.5 m ´ of air per 1 kg of wood. It is important to note that the proportion of gassed parts is very high when burning wood - above 70%, the gases released with and ignite and burn at different temperatures, and the wood burns with high fuel.

c) Loss of non-combustion of solids - this loss depends on the fuel burned, eg. for wood it is very small - up to about 1% of the original weight of wood.

There are two contradictory requirements in terms of reducing fuel burning losses in the combustion chamber. It reduced the amount of hot flue gas (or their temperature) escaping into the chimney. It is. can be achieved by reducing the supply of primary air needed for combustion. Although this action reduces the chimney loss (case a)), the lack of air leads to incomplete combustion and thus increases the loss due to the escape of unburned gases (case b)). If incomplete combustion is to be suppressed, by increasing the supply of sufficient primary air and mixing it well with the gases released from the wood, a high temperature in the combustion chamber and at the same time a high flue gas temperature are ensured, resulting in a chimney loss again (case a).

Achieving more efficient heat transfer to the heated space can be achieved by installing heat exchangers. These can be used in the following cases:

- if an alternative independent source of heating is desired,

- if heating efficiency is to be increased,

- if the domestic hot water is to be heated by an alternative source (fireplace),

to increase the thermal comfort in the heated space, and

- if financial efficiency of heating is to be achieved.

Technici® we also heat exchanger must meet several conditions. The most important is the ability to reduce taring in the heat exchanger to the lowest possible level, while maximizing the efficiency of heat transfer to water. At the same time, its design must be such that it does not throw off the flue gases leaving the cone so much that the chimney is tarred. Indeed, if the chimney losses are to be avoided, by reducing the primary air supply and consequently the combustion intensity, incomplete combustion is achieved, the leakage of solid unburned parts is increased, the chimney is clogged with soot, tar and the escape of exhales into the air. Therefore, in an effort to minimize the formation of pollutants and to reduce taring, the furnace duty is supplied with sufficient air for combustion to be complete.

Existing simple chimney exchangers work on the principle of heating directly through the wall of the exchanger, which forms part of the flue. On one side of the exchanger wall there is cold air of the heated space, on the other side a hot flame of burning gases behind the combustion chamber, before the chimney flue opening to the heating device. Such a heat exchanger typically has a flue portion partially enclosed by small diameter transverse threads for better heat transfer to the heated heater. This worsens the flue gas flow through the chimney flue and reduces its draft. At the same time, in such an exchanger, it is very problematic to clean it from the settled fly ash because of its difficult availability.

To ensure perfect combustion of fuel, perfect utilization of its heat and at the same time maximum reduction of taring and minimization of the formation of exhaust gases, the current chimney exchangers cannot in any case meet, resp. this is to a limited extent and at the cost of additional measures. This is also the main reason why the general (often professional)) opinion prevails so far that flue-gas heat exchangers do not work and do not recommend using them.

N E 8590 Υ1

Patents and utility models related to the mentioned application:

- Bohm Peter: Indoor heat exchanger, utility model, application number PUV 50029-2009.

Chalifoux, R., J., Kozacbuk, J., Beat Exchanger Leak Detection, US4942920A ,.

literature related to the mentioned application:

- https: //www.youtube.coni/waic4j7v-0T_sprVzb9k;

- httpy / trikänasukces.inrb / wood-stove-flue / wood-stove-flue-wood-buniing-stove-flue-parts /

- hltp: //www.lepsidomov.sk/rs/stavba/kureuie/tepeíne- exchanger-to-report-fúnguju- C74.html

The essence of the technical solution

The above-mentioned shortcomings are eliminated by the proposed technical solution of the flue gas heat exchanger of flue gases, whose essence consists in the fact that it consists of (thick-walled) piping with a profile identical to the profile of the chimney and the shell of the exchanger. Flanges with spacing strips are fixed on and fixed to the piping to define the position of the casing with fixed horizontal vents. Ribs are attached vertically to the exchanger pipe. The proposed flue gas heat exchanger utilizes the effect of heat exchange through the wall of the (thick-walled) pipe between the burning flue gas and the flowing air from the heated space. It enters and heated exits through the vents, which are located in the upper and lower part of the exchanger. In the case of mounting the exchanger behind the cone volcano, the exchanger is inside the chimney masonry, which adds to the exchanger the storage capacity of the fireclay material and bricks. The condition is to use a thick-walled pipe with the same profile and inside diameter as the flue. The main benefits of this solution include:

- the possibility of raising the temperature in the combustion center, which results in perfect combustion, reduces the incineration of unburnt gaseous components and reduces emissions,

- lowering the temperature of the flue gas escaping into the chimney, reducing the chimney loss,

- increased heat storage in the exchanger body,

- lower fuel consumption while maintaining thermal comfort,

- njinimaiizác ta fuming of the flue with ad zatni, and the generation of emissions,

- there are no obstructions in the flue gas duct, including the exchanger part, i. j. common chimney cleaning is also maintenance of the exchanger.

Such a solution effectively prevents heat loss and eliminates most of the shortcomings in the currently used methods of heating work and living spaces with a solid fuel source (allows for perfect combustion and reduces taring and maintenance of the exchanger).

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution is explained in more detail by means of the drawing, in FIG. 1 shows the overall arrangement of the functional parts of the device.

EXAMPLES

In FIG. 1 shows an exemplary embodiment of a flue gas heat exchanger and the overall arrangement of its functional parts. The essence of the proposed flue gas heat exchanger technical solution consists in that it contains (thick-walled) pipe 1 with high thermal conductivity, which corresponds in profile and inside diameter to the chimney profile, the pipe 1 forming part of the cone before or after its flue without any obstacles inside. . Flanges 2 with spacer strips 6 are fixed and fixed thereon. These define the position of the housing 3 with fixed horizontal vents 5. Ribs 4 are vertically attached to the exchanger pipe 1. The proposed flue gas heat exchanger utilizes the effect of heat exchange through the wall pipe. 1 between the combustion chimney gases inside and the flowing air from the heated space that enters and heated exits through the vents 5 located at the top and bottom of the exchanger. If the exchanger is installed behind the chimney flue, the exchanger is inside the chimney masonry, and this adds to the heat exchanger the storage capacity of the used fireclay material and bricks.

Such a solution provides several advantages, in particular effectively preventing thermal chimney losses and losses from unburned gaseous particles, increasing efficiency, i. j. Maintains thermal comfort while reducing fuel consumption and the use of residual heat, thereby reducing heating costs and, last but not least, reducing emissions and minimizing soot fouling, thus eliminating most of the drawbacks to date

S K 8590 Υί common methods of heating work and living spaces.

Industry bottoms usable

The technical solution can be used in all heating systems in which flue gas flows due to the combustion of fuel, the high temperature of which allows heat to be discharged to the heated spaces by means of a flue gas heat exchanger. The device can be used in all areas of the economy and in households.

Claims (1)

PROTECTION REQUIREMENTS An exhaust gas heat exchanger, characterized in that it consists of a heat exchanger pipe (1) to which the ribs (4) are fixed vertically and on which 5 flanges (2) with spacers (6) defining them are fixedly fixed and fixed. the position of the housing (3) with the horizontal vents (5) fixedly connected.