RU2252917C1 - Method of a vacuum deaeration of water - Google Patents

Abstract

FIELD: heat power engineering.

SUBSTANCE: the invention is pertaining to the field of heat power engineering and may be used in boiler rooms and the thermal power stations. A method of a vacuum deaeration of water, according to which the initial water and the heating agent are fed into a vacuum deaerator and deaerated water is withdrawn from the vacuum deaerator and the flash steam formed in the process of deaeration is removed with the help of a mechanical vacuum pump. Control over operation of the mechanical vacuum pump is performed by a change of the rate of its electric drive rotation speed according to the given value of pH of the deaerated water. The technical effect achievable by the stated invention consists in upgrading of the quality and efficiency of the vacuum deaeration of water due to maintenance of an optimal mode of operation of the mechanical vacuum pump and due to exception of its operation at excessive power consumptions.

EFFECT: the invention ensures upgrading of the quality and efficiency of the vacuum deaeration of water.

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Description

The invention relates to the field of power engineering and can be used in boiler rooms and thermal power plants.

Known analogues are the methods of vacuum deaeration of water, by which the source water and the heating agent are fed into a vacuum deaerator, the deaerated water is removed from the vacuum deaerator, the vapor formed during deaeration is removed using a mechanical vacuum pump (see patent No. 2203857 RU, class C 02 F 1/20, 2003. BI No. 13). This analogue is adopted as a prototype.

The reasons that impede the achievement of the technical result indicated below when using the known method adopted as a prototype include reduced efficiency of vacuum deaeration of water due to the lack of regulation of the operating mode of a mechanical vacuum pump.

The technical result achieved by the claimed invention is to improve the quality and efficiency of vacuum deaeration of water by regulating the operation of the electric drive of a mechanical vacuum pump.

To achieve this result, a method for vacuum deaeration of water is proposed, according to which the source water and heating agent are fed into a vacuum deaerator, deaerated water is removed from the vacuum deaerator, and the vapor formed during deaeration is removed using a mechanical vacuum pump.

A feature of the proposed method lies in the fact that the regulation of the mechanical vacuum pump is carried out at a given pH value of deaerated water.

A new method of vacuum deaeration of water allows to increase the cost-effectiveness of vacuum deaeration of water by maintaining the optimal operating mode of a mechanical vacuum pump and eliminating its operation with excessive energy costs.

The drawing shows a schematic diagram of a vacuum deaeration plant, explaining the method.

The installation contains a vacuum deaerator 1 with pipelines for supplying source water 2 and a heating agent 3, for discharging deaerated water 4 and for evaporation 5, a mechanical vacuum pump 6 with electric actuator 7, a pH indicator regulator 8 connected to a sensor installed on the pipeline for discharging deaerated water 4 pH 9 and with a frequency converter 10 of the electric drive 7 of the mechanical vacuum pump 6.

The method of vacuum deaeration of water is as follows.

The source water is supplied to the vacuum deaerator 1 through the pipe 2, the heating agent is introduced through the pipe 3. The water treated during the deaeration is discharged from the deaerator through the deaerated water pipe 4, the resulting vapor is removed through the vapor pipe 5 by a mechanical vacuum pump 6 with electric drive 7. Installed on the pipeline deaerated water 4 with a pH indicator sensor 9 using a regulator 8 measure the pH value of deaerated water and when it deviates from a predetermined value corresponding to the absence of free dioxide in water carbon, alter the drive speed of the mechanical vacuum pump 7 6-converter 10.

Claims (1)

The method of vacuum deaeration of water, in which the source water and the heating agent are fed into a vacuum deaerator, the deaerated water is removed from the vacuum deaerator, the vapor formed during deaeration is removed using a mechanical vacuum pump, characterized in that the mechanical vacuum pump is controlled by changing its rotational speed electric drive at a given pH value of deaerated water.