RU2467254C1 - Deaeration membrane expansion tank - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention refers to independent heating systems, and namely to deaeration membrane expansion tanks, and can be used in independent heating and hot water supply systems for heating of internal volumes of buildings. Deaeration membrane expansion tank consists of the housing inside which there installed is membrane that is fixed in it by means of a flange; at that, internal volume of membrane is equal to volume of deaeration membrane expansion tank, and in lower part of the housing there installed are heat carrier connection pipes of the heating system and connection pipe of overflow tube; at that, membrane and housing in its upper part are equipped with non-return valve. Air volume of the housing of deaeration membrane expansion tank is connected to atmosphere through non-return valve and heat insulated by means of heat insulation.

EFFECT: effect consists in heat carrier pressure reduction, possibility of removing the gases dissolved in heat carrier through expansion tank, exclusion of air penetration from the tank air volume through membrane to heat carrier, and the increase up to 0,8-0,9 of the tank filling coefficient.

1 cl, 1 dwg

Description

FIELD OF THE INVENTION

The invention relates to the field of autonomous heating systems, in particular to a deaeration-expansion membrane tank, and can be used in autonomous heating systems and hot water for heating the internal volumes of buildings.

State of the art

A boiler plant is known comprising a household boiler, which is connected in the upper part to the gas duct of the boiler and a direct heating line, while the lower part of the gas duct is made in the form of an economizer, consisting of a heating inner jacket and a hot outer jacket, connected to a direct heating line and forming a circular section with a central location of the pipe with rounded ends, mounted coaxially with the inlet and outlet pipes of a straight heating line, while the outer water jacket forms a water heater th column, and heating the outer jacket inner pipe is simultaneously hot-water column (see. US Pat. RF №2105927, cl. F22D 1/36, publ. 27.02.1998 g).

The disadvantage of this installation is the high cost of its manufacture, low efficiency.

Known water-heating installation, consisting of a heat exchange section with pipelines and valves, equipped with smoke tubes with catalyst turbulators, a gas-liquid burner with a spiral and a casing wall, the outer surface of which is protected by a heat-air casing, the heat exchange section is divided by wavy partitions into heat exchangers, while in each cavity heat exchangers can be placed electric heaters (see US Pat. RF №2148216, CL F24H 1/34, publ. 04/27/2000).

The disadvantage of this installation is its low reliability.

The closest in technical essence and the achieved positive effect and accepted by the author for the prototype is a deaeration-expansion membrane tank containing a housing, a membrane, coolant pipes (see. For professionals “Selection and installation of membrane tanks for heating and domestic hot water”, company Wester, November-December No. 6 (58), 2010, p. 68-71).

The disadvantage of these furnished tanks is the constant operation at maximum coolant pressure, the inability to remove dissolved gases in the coolant, up to 30% of air entering the tank’s air volume through the membrane into the coolant, as a result of which, after two years of operation without annual maintenance, the membrane expansion tank wears out, turning into a hydraulic blank, in addition, the tank fill factor rarely exceeds 0.5, that is, 50% of the tank volume is not used to expand the coolant.

Disclosure of invention

The objective of the invention is to develop a deaeration-expansion membrane tank having a decrease in coolant pressure, the ability to remove dissolved gases in the coolant through the expansion tank, with the exception of air from the air volume of the tank through the membrane into the coolant, increasing to 0.8-0.9 tank fill factor .

The technical result that can be obtained using the present invention is to reduce the pressure of the coolant, the ability to remove dissolved gases in the coolant through the expansion tank, to prevent air from entering the air volume of the tank through the membrane into the coolant, increase to 0.8-0.9 coefficient filling the tank.

The technical result is achieved using a deaeration-expansion membrane tank containing a housing, a membrane, nozzles of the heating medium, the inner volume of the membrane is made equal to the volume of the housing of the tank, which is connected in the lower part to the nozzles of the heating system, and in the upper part to the atmosphere using a non-return valve, the air volume of the tank body being connected to the atmosphere through a non-return valve.

Brief Description of Drawings and Images

In FIG. given a deaeration-expansion membrane tank, general view.

The implementation of the invention

The deaeration-expansion membrane tank consists of a housing 1, inside of which a membrane 2 is installed, which is hermetically fixed in it with a flange 3, while the internal volume of the membrane 2 is made equal to the volume of the deaeration-expansion membrane tank, and pipes are installed in the lower part of the housing 1 4 coolant of the heating system (not shown in FIG.) And a pipe (not indicated in FIG.) Of the overflow pipe 5, while the membrane 2 and the housing 1 in the upper part are equipped with a check valve 6 and 7, respectively, while the air volume to the housing 1 of the deaeration-expansion membrane tank is connected to the atmosphere through a check valve 7 and is insulated with thermal insulation 8.

Deaeration-expansion membrane tank operates as follows.

The heating system is filled with the coolant through nozzles 4 to the level of the overflow pipe 5, then the heating system is heated to operating temperature, while the coolant expands when heated, the level of the coolant rises up the membrane 2 and under the influence of the coolant pressure, the membrane 2 takes the form of a housing 1, while the internal the volume of the deaeration-expansion membrane tank is filled by 80-90%, while the air contained in the air volume of the housing 1 is displaced by the membrane 2 through the check valve 7 into the atmosphere, and the uh, which is initially contained in the internal volume of the membrane 2, is displaced by the heat carrier through the upper part of the membrane 2 and the non-return valve 7 into the atmosphere, so the air is removed as a whole from both volumes: the housing 1 of the deaeration-expansion membrane tank and the internal volume of the membrane 2, the heating system is temporarily they turn off, the coolant level returns to its previous lower position, the membrane 2 decreases in volume, and a vacuum occurs in the air volume of the housing 1, which due to the action on the elastic membrane 2 before is introduced into the internal volume of the membrane 2, while under the influence of rarefaction the solubility of gases in the coolant is reduced to a minimum, gases are released and fill the internal volume of the membrane 2, and when the coolant is reheated, the released gases are removed by the coolant from the internal volume of the membrane 2 through the upper part of the membrane 2 and the return valve 6 into the atmosphere, at the same time there was a vacuum deaeration of the coolant, the heating system is turned on, with constant operation of the heating system, the internal volume of the membrane 2 is filled with heat with a carrier under a pressure of 0.02 bar, the solubility of gases in the coolant at this pressure is minimal, soluble gases are constantly released in the internal volume of the membrane 2 and when gases reach 0.02 bar, they are automatically removed through the upper part of the membrane 2, the check valve 6 into the atmosphere, while thermal deaeration of the coolant occurs constantly, practically at atmospheric pressure, air from the air volume of the housing 1 cannot enter the coolant through the membrane 2, since the solubility of air at a pressure of 0.02 bar is minimal, Zolation 8 reduces heat loss through the surface of the housing 1.

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

- decrease in coolant pressure;

- the ability to remove dissolved gases in the coolant through the expansion tank;

- the exclusion of air from the air volume of the tank through the membrane into the coolant;

- increase to 0.8-0.9 tank fill factor;

- improving the reliability of the boiler;

- cheaper heat production.

Claims (1)

A deaeration-expansion membrane tank containing a housing, a membrane, coolant pipes, characterized in that the internal volume of the membrane is equal to the volume of the tank body, which is connected in the lower part to the coolant pipes of the heating system, and in the upper part to the atmosphere using a non-return valve, wherein the air volume of the tank body is connected to the atmosphere through a check valve.