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THERMAL DEVICES, DEVICES FOR HEATING LIQUID MEDIA AND THEIR APPLICATION
INVENTION
Patent of the Russian Federation RU2140609

ELECTROPAROGENERATOR SELF-REGULATED

ELECTROPAROGENERATOR SELF-REGULATED

The name of the inventor: Larev Anatoly Valentinovich
The name of the patent holder: Larev Anatoly Valentinovich
Address for correspondence: 664033, Irkutsk, ul.Lermontova, d.297b, ap.181, Anatoly Larevu Valentinovich
Date of commencement of the patent: 1998.04.15

The invention relates to the field of devices used for autonomous steam heating of premises and for technological needs. The steam generator comprises a sealed housing 1 with electrodes 2 arranged in its cavity forming together with the housing a heating chamber combined with a reserve capacity, a branch pipe 3 used for supplying steam to the heated system and receiving condensate therefrom, a sealed compensation vessel 4 connected to a heating chamber Below the level of the electrodes and raised to the height H, the safety valve 5 installed on the compensation tank. The invention provides a simplification of the construction and an increase in ease of use.

DESCRIPTION OF THE INVENTION

The invention relates to the field of devices used for autonomous steam heating of rooms and technological needs.

Electrode steam generators are known whose power regulation is performed by automatically changing the electrode immersion area in water, depending on the vapor pressure in the heating chamber and using it to supply steam to the heated system.

Close to the claimed is the steam generator Kazakova N.I. (Description of the invention No. 80626, entitled "Boiler plant"). The boiler plant contains a heating chamber connected at the top through a tap with a pressure pipe of the heated system, and from below through a crane with a compensation capacity combined with a reserve capacity and connected to the return pipeline of the system, which is raised above the electrodes. A pump with a relief valve and a starting device in the form of a pipe with valves are provided.

The boiler plant has the following drawbacks:

- the use of normally open valves requiring maintenance and being devices of low reliability at high operating temperatures;

- the need for manual operations when starting the steam generator and outputting it to the operating mode;

- in the low pressure version, self-regulation of steam pressure is provided only theoretically, when the power consumed by the system and output from the steam generator after putting them into operation is strictly the same, and in practice, any subsequent reduction in power consumption or increase in output (for example, due to increased voltage in the mains) Will lead to an uncontrolled increase in steam pressure - "spillage", therefore it is necessary to constantly monitor the vapor pressure and manually adjust it with a crane of the power plant or report the heated system to the atmosphere, obtaining other consequences;

- the need for a pumping device with a relief valve to create a steam that is higher than atmospheric pressure, which greatly complicates the operation and operation of the steam generator, and most importantly, reduces its reliability due to the constantly running pump at high temperature;

- increased hydraulic resistance to steam flow from the heating chamber to the heated system due to the presence of a crane between the power output.

The closest to the claimed is the steam generator Lareva A.V. (Application No. 96121495/06 "Electric heater self-regulating") comprising a heating chamber connected to the inlet and outlet nozzles; Compensation capacity, combined with a backup and connected to the heating chamber, and with the return pipeline of the heated system, while raised to a height in relation to the electrodes; Normally open spring-loaded bellows-actuated valve installed between the heating chamber and the outlet nozzle.

This steam generator has the following drawbacks:

- the presence of an integrated mechanical power controller containing moving parts, and requiring additional costs for its manufacture, assembly and maintenance;

- limiting the head of steam supply to the heated system by the height of the hydrostatic column of water;

- increased hydraulic resistance to steam flow from the heating chamber to the heated system due to the presence of the regulator valve.

The invention is based on the task of creating an extremely simple in device and process steam generator with stepless self-regulation of steam pressure power without the use of pumping devices, mechanical and other regulators allowing the use of an additional head of steam above the hydrostatic column to supply steam to the heated system, while increasing its reliability and Security.

The task has been solved due to the fact that the sealed compensation capacitance is connected exclusively to the sub-electrode space and is equipped with a safety valve, and as a return pipe the steam supply line is used in the heated system.

The present invention is explained in the drawing, which shows a steam generator in a section.

ELECTROPAROGENERATOR SELF-REGULATED

The steam generator comprises a sealed housing 1 with electrodes 2 arranged in its cavity forming together with the housing a heating chamber combined with a reserve capacity; Nipple 3, used to supply steam to the heated system and receive condensate from it; A sealed compensation vessel 4 connected to the heating chamber below the level of the electrodes and raised above the electrodes to a height H; Safety valve 5 mounted on the expansion tank.

THE STEAM GENERATOR WORKS AS FOLLOWS:

When power is applied to the electrodes 2, the water filling the housing 1 is heated to a boil. Developing the maximum possible power, the steam generator generates excess vapor pressure by means of a completely closed system, which is used to supply it to the branch pipe 3 and expel water to the compensation vessel 4 in order to create a hydrostatic column of water "H" necessary for feeding steam into the heated system under controlled pressure . Simultaneously, in the compensation vessel 4, the air contained in it is compressed, creating a controlled pressure for supplying steam to the heated system, in addition to the hydrostatic column of water, and reducing the water level in the heating chamber. At some point, the level of immersion of electrodes in water will begin to decrease and the power of the steam generator will decrease until the balance of the power consumed by the system and the output of the steam generator is reached. If there is not enough water in the heating chamber, the steam generator will not reach the design pressure, and if its surplus is filled, the rising steam pressure in the heating chamber will compress the air in the compensation vessel 4 until the safety valve 5 opens, In the compensation capacity 4 excess of filled water.

When the required power is increased, the pressure in the system will begin to drop, which will cause expansion of the compressed air in the compensation tank 4 and the supply of the necessary portion of water into the heating chamber from it to increase the output power.

Consequently, the steam generator automatically goes to any predetermined vapor pressure and maintains it without using pumping devices and regulators with valves, sensors, converters, control cabinets, etc.

An essential advantage of the proposed steam generator is, on the one hand, the lack of additional resistance elements to the steam supply, and on the other hand - the presence of an additional head to the hydrostatic column H from the compressed air, providing the maximum possible power and distance of the steam transmission.

Changing the vapor pressure during the operation of the steam generator is carried out by partial discharge from the heating chamber (decrease) or by replenishment (increasing pressure) of water, for example, with normally closed valves, using sewerage and water supply system. Change the vapor pressure can be and bleeding or air supply to the compensation tank, for example, from the receiver using a controlled air reducer. Considering that the pressure in the water supply system or in the air system is limited, even in the case of negligence of the maintenance personnel it is impossible to create an emergency situation in the steam generator and the heated system.

The installation of a gas-water-water heat exchanger in the main or additional housing within the level of the electrodes location makes it possible to obtain a standby steam generator on a solid, liquid or gas fuel in case of a power outage, which can be used as the main one, for example, in the case of a rise in the cost of electricity compared to a thermal one.

Thus, the proposed steam generator is extremely simple in terms of design, very technological, extremely reliable and safe, easy to set up and operate, flexible and easy to operate, does not contain elements that require metrological support, which makes it possible to widely use it for space heating And technological needs.

CLAIM

1. The electro-steam generator is self-regulating, comprising a sealed housing with a branch pipe and electrodes installed in its cavity, a sealed compensation capacitance connected to the sub-electrode space of the housing and located above the electrodes, and a safety valve characterized in that the used as a reserve capacitance case by its sub-electrode space through The compensation capacitance is connected to the safety valve, and the inlet and outlet manifolds are combined.

2. The electric steam generator is self-regulating according to claim 1, characterized in that a gas-flame water heat exchanger is installed within the level of the electrodes location.

print version
Date of publication 30.01.2007gg