RU125312U1 - BATH FURNACE WITH GAS BOTTOM BURNER - Google Patents

Abstract

The utility model relates to the field of heat engineering, namely to domestic sauna stoves and is intended for heating the steam bath room, heating water and generating steam, used mainly in public baths. A sauna stove with a gas blast burner contains a housing, an ash-box, a tank for heat-accumulating material placed above the firebox, buried in the firebox and having a common wall with it and a chimney. The furnace contains a reverse channel system for flue gases, consisting of front, separated from each other vertical channels formed by the front wall of the tank for heat storage material and the front wall of the housing, back separated from each other by vertical channels formed by the back wall of the tank for heat storage material and rear wall housing and connecting the vertical channels, and located in the volume of the container for the heat storage material, at least one horizontal channel A single turn of the flue gases, and rotations of at least two. 1 bp f-ly, 6 zp F-ly, 5 ill.

Description

The utility model relates to the field of heat engineering, namely to domestic sauna stoves and is intended for heating the steam bath room, heating water and generating steam, used mainly in public baths.

Gas stoves of periodic action are known for use in public baths. Heat-accumulating furnaces, due to the large mass of heat-accumulating charge, are heated once a day and are characterized by high heat capacity.

The batch furnace is heated in advance and the stones are heated directly by the flue gases washing them to a temperature in the lower layer of about 900 ° C, in the upper layer - 600-700 ° C.

The disadvantage of such furnaces is a larger amount of stones, which is usually several tons and a large mass of the furnace, which should accumulate a sufficient amount of heat, the possibility of soot formation on the stones and its ingress into the steam room.

The continuous furnace can be heated during the procedure, as the stones are kept in a chamber isolated from the flue gases. This eliminates the ingress of smoke in the steam room, as well as the deposition of soot on the stones. The temperature of stones in such furnaces with indirect heating does not usually exceed 400 ° C.

The advantage of continuous furnaces in comparison with periodic furnaces is the ability to heat the furnace as the accumulated heat is used during the use of the steam room.

Known gas-stove bathhouse company "Ermak" http://www.ermak-termo.ru/catalog/pechi/gaz/, the company "Teplodar" http://www.teplodar.ru/catalog/pechi-sauna-banya/36 -rus-gazovaya. These furnaces have the ability to work on both solid and gaseous fuels. For the use of natural gas, they are equipped with a gas-burning device with automatic regulation and safety. The gas burner device is designed to burn the incoming gas mixture in domestic bath stoves, and the automation provides safe periodic heating. At all of these furnaces, atmospheric burners are installed with a preliminary mixing of gas with a part of air, which belongs to the class of ejection burners operating at atm. pressure or vacuum in the furnace to 20 Pa.

The disadvantage of furnaces with an atmospheric gas burner is that the operation of such furnaces requires natural thrust, under the action of which the movement of flue gases is carried out. Natural draft is created due to the difference in density of the outside atmospheric air and gases in the chimney, which removes the combustion products.

Known bath stoves that use artificial thrust are blowing or blower gas burners. According to this principle, Saunagaskachels stoves work http://www.saunacity.nl/saunagaskachels. KUSATEK ovens http://www.kusatek.de/saunagasoefen/saunagasoefen/3467119f1f0cbbc02/d013.html

The closest to the technical essence and the achieved result is the Kutkin bath stove with a blast burner. The furnace design is protected by patent number 70562, IPC F24B 1/24, publ. 01/27/08 with the subsequent installation of a blast gas burner on it http://www.kutkin.ru/pechi.php?id=73 The metal furnace according to patent No. 70562 includes a chimney, a body, a screen having at least one vertical section, the firebox, moreover, the width of the firebox is less than the width of the case, located between the side walls of the firebox and the vertical sections of the screen, an air-heating chamber, a metal container with openings for vaporization, filled with heat-accumulating material. A metal container is placed above the firebox and has a common wall with the firewood. The part of the furnace body connecting the container with the heat-accumulating material and the screen is made airtight, and between the metal chamber with the heat-accumulating material and the air-heating chamber there is an air intake element. The hole for vaporization is located in the upper part of the tank with heat-retaining material and is equipped with a lid.

The disadvantage of this furnace is the absence of revolutions of flue gases. Flue gases make a short way and almost directly go into the chimney. This leads to a decrease in the efficiency of heating stones and reducing the efficiency of the furnace as a whole. In addition, the contact with the metal has only the first layer of stones and it is well heated. Further heat is transferred from stone to stone and due to thermal radiation from the metal bottom of the heater.

The task of the utility model is to increase the efficiency of the bath stove and the convenience of its operation.

The technical result achieved by this utility model is to increase the heat exchange area by increasing the path of passage of gaseous products of combustion

This technical result, when implementing a utility model, is achieved by the fact that a bath stove with a gas blast burner, comprising a housing, a firebox, a tank for heat-accumulating material, placed above the firebox, buried in the firebox and having a common wall with it, contains a system of circulating channels for flue gases, consisting of front, separated from each other vertical channels, formed by the front wall of the tank for heat storage material and the front the body wall, the rear vertical channels separated from each other, formed by the rear wall of the container for heat-accumulating material and the rear wall of the body and connecting the vertical channels, and located in the volume of the container for heat-accumulating material, at least one horizontal channel for one revolution of the flue gases, and revolutions of at least two.

The task is also solved due to the fact that the total cross-sectional area of the channels of one revolution is not less than the cross-sectional area of the chimney; turbulators are installed in horizontal flue gas channels.

Sauna stove is equipped with a protective screen that creates convective currents, while the protective screen is made of metal, or brick or stone.

Conducted by the applicant analysis of the level of technology, including a search for patents and scientific and technical information sources and identification of sources containing information about analogues of the claimed utility model, allowed to establish that the analogues, characterized by a set of features identical to all essential features of the claimed utility model are missing. Therefore, the claimed utility model meets the condition of patentability "novelty."

Multiturn gas duct system consists of sequentially connected vertical and horizontal channels. In such channels, the gases, moving from the firebox to the chimney, make many turns and experience considerable resistance on their way. To overcome this resistance, the furnace is equipped with a blast gas burner. Heat of flue gases is accumulated and transferred to the walls of the channels and heat-accumulating material, and does not escape into the atmosphere. This allows for a high heat exchange between fire and stones. When the temperature of the walls of the horizontal channels is 500 ° C, the temperature of the walls of the chimney on the surface is 200 ° C, which indicates a very high efficiency of the furnace.

A blow burner modulates a circular flame in the form of a horizontal torch into the boiler furnace, which washes evenly the reservoir for the heat-accumulating material recessed into the firebox. The geometry of the bottom of the tank for heat-accumulating material is chosen so as to maximize the area of contact with the burner flame, which raises the temperature of the bottom layer of stones.

To increase the efficiency of heat removal from the flue gas stream, turbulizers are installed in the horizontal channels, increasing the heat removal area and the time of contact of the flue gases with heat-transfer surfaces.

In the proposed furnace, a large mass of stones quickly warms up due to the fact that the horizontal chimney channels are located in the volume of the tank for heat-accumulating material, and the stones come into contact with the surface of the metal wall of the channel heated by hot flue gases. The rate of heating of stones from the metal surface of the channel is higher and more efficient than from stone to stone. The uniform heating of a large volume of stones allows a sufficient amount of light steam to be obtained in a Russian steam bath for a long time.

For the organization of flue gas circulation, one horizontal channel is enough, but in this case, the heat removal area will be less than from 2 or 3 channels. However, it is necessary to select the optimal number of channels for one revolution. Otherwise, in the case of an increase in the number of channels, the labor intensity, the metal intensity of the furnace and its dimensions increase.

The optimal number of revolutions ensures efficient stone heating. With an increase in revolutions, the temperature of the flue gases at the outlet may drop to such values when the stones will no longer heat up. In addition, an unnecessarily large number of revolutions increases the dimensions of the furnace.

For a comfortable climate in the steam room it is necessary to isolate infrared radiation from the metal when it is strongly heated. To do this, the furnace is equipped with a protective screen. It can be either a metal screen, or lined with stone or brick.

The design of the utility model is shown in the drawings, where figure 1 shows a general view of the furnace; figure 2 - section of the furnace, the view from the side; figure 3 - section of the furnace, top view; figure 4 - section of the furnace, rear view; figure 5 - section of the furnace, front view

The furnace consists of a housing 1, a firebox 2, with a hole 3 for installation through the flange 4 of a gas burner 5, a tank 6 for heat storage material and a chimney 7. The number of horizontal channels of gas passages and the number of revolutions was selected experimentally. If there are six horizontal channels in which three flue gas turns are organized, two channels in each revolution, the optimum heat removal from the heat-transfer surfaces and the specified dimensions of the furnace are achieved. With a decrease in the number of channels, the area of heat transfer surfaces will decrease, with an increase in the number of channels, the overall size of the furnace will increase. The container 6 for heat-accumulating material is buried in the firebox 2. The flue gas channel system includes three front vertical channels that are separated from each other and are formed by the front wall of the housing 1 and the front wall of the heat storage container 6, and the vertical channels 8 organize the first flue gas turnover , and the vertical channel 9 is the outlet channel and is connected to the chimney 7. The rear wall of the furnace body 1 and the rear wall of the heat-storage material container 6 form three rear vertices cial channel, and they are separated from each other. Two vertical channels 10 are lead-in for flue gases from the firebox to the horizontal channels 12 of the first turn, the rear vertical channel 11 collects flue gases from the horizontal channels 13 of the second turn and directs them to the horizontal channels 14 of the third turn. To increase the area of heat removal in the horizontal channels installed turbolization 15. They can be installed in all horizontal channels, or selectively. The furnace is equipped with a protective screen (not shown).

The furnace works as follows. In the hole 3 of the furnace install gas blowing (fan) burner 5 and fasten with flange 4.

The process of gas combustion is carried out in the firebox 2 at an overpressure with high speed. High-temperature and high-velocity combustion products pass from the firebox 2 through a labyrinth path formed by vertical and horizontal channels. Coming out of the firebox 2, the flue gases enter the vertical channels 10 and then into the horizontal channels 12 of the first revolution. Heat from combustion products with a high temperature is transferred through the walls of the channels to the heat-storage material. After this, the products of combustion enter the front vertical channels 8 and make a second turn along the horizontal channels 13. Once in the rear vertical channel 11, the products of combustion rush into the horizontal channels 14 of the third turn. The cooled products of combustion that have passed through the channels fall into the front vertical channel 9 and then into the chimney 7.

Thus, a continuous-action bath stove is proposed, equipped with a modern blast burner and in which the movement of flue gases is organized in such a way that internal circulation of flue gases with maximum heat transfer is ensured.

Claims (7)

1. A sauna stove with a gas blast burner, comprising a housing, a firebox, a tank for heat-accumulating material placed above the firebox, buried in the firebox and having a common wall with it, a chimney, characterized in that it contains a reversible system of channels for flue gases consisting of front vertical channels separated from each other, formed by the front wall of the container for heat storage material and the front wall of the housing, rear channels separated from each other by vertical channels formed by the rear wall heat accumulating material container and the rear wall of the housing and connecting the vertical channels and arranged in the volume capacity for the heat-accumulating material, at least one horizontal channel for one revolution of the flue gases, and rotations of at least two. 2. A sauna stove with a gas blast burner according to claim 1, characterized in that the total cross-sectional area of the gas ducts of one revolution is not less than the cross-sectional area of the chimney. 3. A sauna stove with a gas blow torch according to claim 1, characterized in that turbulators are installed in horizontal gas ducts. 4. A sauna stove with a gas blast burner according to claim 1, characterized in that it is equipped with a protective screen that creates convective currents. 5. Sauna stove with a gas blast burner in PP.1 and 4, characterized in that the protective screen is made of metal 6. Sauna stove with a gas blast burner in PP.1 and 4, characterized in that the protective screen is made of brick. 7. Sauna stove with a gas blast burner in PP.1 and 4, characterized in that the protective screen is made of stone.

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