RU2691080C1 - Device for production of superheated steam in bath furnaces - Google Patents

Abstract

FIELD: heating equipment.SUBSTANCE: invention relates to heat engineering equipment, namely to steam generators of domestic bath furnaces, and is intended for production of superheated steam for its further use during bath procedures. A device for production of superheated steam contains a capacity installed on a smoke hole of a bath furnace and a superheater connected to it. At that, the superheater is located inside the chimney formed by the inner walls of the water tank, and is made in the form of a pipeline the end part of which is brought into the furnace space and contains an outlet nozzle, which leaves into the hole in the upper wall of the furnace housing.EFFECT: high efficiency of the process of superheated steam in a sauna furnace.1 cl, 2 dwg

Description

The invention relates to heat engineering equipment, in particular to steam generators of household bath furnaces, and is intended to produce superheated steam for subsequent use during bath procedures.

Known technical solutions, in which the production of superheated steam for bath procedures is carried out without the traditional heater (see, for example, patent RU 154892, IPC F24B 9/00, published September 10, 2015), which is a sauna furnace containing a firebox, a hole for supplying fuel, a chimney, a steam superheater and a cavity connected to it for evaporation of water formed by the walls, some of which are heated to the boiling point of the water of the furnace surface.

Known solutions have the following disadvantage: lack of efficiency due to the relatively low efficiency of heat transfer from flue gases to superheated steam. According to the well-known provisions of the theory of heat exchangers (the superheater in the furnace is a heat exchanger), these devices, depending on the direction of movement of coolants, can operate during forward flow, countercurrent or cross-flow (see, for example, Hausen X. Heat transfer during forward flow, countercurrent and cross current: Trans. with him. - M .: Energoizdat, 1981.- 384 pp., p.13). In the above technical solution, according to the description and the drawing, a cross-current circuit is implemented: “both coolants move under a right or approximately at right angles to each other” (the same source, p. 13). This scheme is significantly inferior in efficiency to the countercurrent scheme in which the maximum temperature gradient between it and the heat carrier (flue gases) can be maintained along the path of the heat-receiving carrier (in our case, superheated steam). In general, to increase the efficiency of the steam overheating process, one should make maximum use of the energy supplied with the combustion products to the chimney - in fact, the heat lost, which is not provided for in the noted technical solution.

Known adopted as the closest analogue steam generating module (see patent RU 174193, IPC F24B 9/00, published 06/10/2017), containing a water tank connected to it with a steam superheater channel, a steam superheater nozzle, made with the possibility of steam output through the outer casing of the device to the outside, while the superheater is made in the form of a hollow tank with the possibility of placing inside the guide walls, and the chimney is formed by the walls of the water tank.

The advantage of the known solution is the use of heat of flue gases entering the pipe to heat the water to saturation temperature, as well as to overheat the water vapor, however, the disadvantage of the previous technical solution is the low efficiency of steam overheating due to the use of a cross-current circuit in it.

The objective of the claimed invention is to create a more efficient device for producing superheated steam in bath furnaces. The technical result of the claimed invention is to increase the efficiency of the process of overheating of steam in a bath furnace with the inventive device.

The technical result is achieved due to the fact that in the device for producing superheated steam in bath furnaces, which contains a water tank installed on the smoke hole of the bath furnace and a superheater connected to it, the superheater is located inside the chimney formed by the inner walls of the water tank and is designed as a pipeline The end part of which is brought into the furnace space of the furnace and contains an outlet nozzle extending into an opening in the upper wall of the furnace body.

The invention is illustrated by drawings, which shows a General view of the device (figure 1), and the variant of its execution (figure 2).

A device for producing superheated steam in bath furnaces consists of a water tank 1 with a lid 2 formed by the inner wall of the chimney tank 3 placed inside the chimney of the steam superheater 4, which goes inside the furnace 5 with a hole 6 for the steam superheater outlet nozzle 7.

In the embodiment of figure 2, the device contains an additional section of the superheater 8, made in the form of a tank with guides inside it to lengthen the path of the steam for its additional overheating.

The device works as follows. After ignition and reaching the required capacity of the furnace 5, there is a process of heating the water previously filled in the container 1 and the sealed lid 2, partially due to the heat transferred from the container 1 directly from the furnace 5 through the bottom of the container 1, partially due to flue gases, moving along the inner wall of the tank 1 through the chimney 3. When the water reaches the saturation temperature, vaporization begins, as a result of which the pressure rises above the free surface of water in the tank 1 and under the action of the pressure difference in the tank and 1 and at the exit of the nozzle 7, the process of steam movement inside the superheater 4 with access to the bath room is carried out. Along the way the steam in the superheater 4 is additionally heated by flue gases rising inside the chimney 3. Since the combustion products of the fuel move in the chimney 3 under the influence of self-depletion in the direction opposite to the steam in the superheater 4, the most efficient method of heat exchange between the steam and flue gases is realized - counterflow at which the maximum possible temperature difference between media is maintained. If necessary, to further increase the temperature of superheated steam, the superheater 4 can be equipped with an additional section 8. Despite the fact that in the area of the additional section 8 heat exchange is carried out by cross-current, due to the fact that this section 8 is actually in the firebox of the furnace 4, the temperature superheated steam with this method of heat transfer can theoretically be brought to the temperature of the firebox.

The inventive device, due to the additional heating of steam during its movement in the superheater from the combustion products moving up the chimney, provides high efficiency and accelerates the process of vaporization in the steam room.

Claims (2)

1. A device for producing superheated steam in bath furnaces, which contains a tank installed on the smoke hole of the bath stove and a steam superheater connected to it, characterized in that the steam superheater is located inside the chimney formed by the inner walls of the water tank and is designed as a pipeline, the terminal part of which bred into the furnace space of the furnace and contains an outlet nozzle extending into the hole in the upper wall of the furnace body. 2. A device for producing superheated steam in bath furnaces according to claim 1, characterized in that an additional section is installed between the superheater and the outlet nozzle of the superheater located in the furnace space of the furnace.

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