RU2230255C2 - Method of operation of heat generating plant - Google Patents

Abstract

FIELD: utilization of heat of blow-down water in heat generating plants. SUBSTANCE: proposed method includes generation of steam in steam boiler and de-aeration of makeup water of closed heat supply system in atmospheric de-aerator; mineral admixtures accumulating in boiler water are discharged through blow-down water pipe line and are used as heating medium for atmospheric de-aerator. EFFECT: enhanced economical efficiency and ecological safety. 1 dwg

Description

The invention relates to a power system and can be used in heat generating installations.

There is a known method of operation of a heat-generating installation, in which steam is generated in a steam boiler, mineral impurities accumulating in the boiler water are removed from the boiler through a purge water pipeline to a continuous purge separator, the non-evaporated part of the water is sent to heat exchangers-coolers to heat the source water of the heat-generating plant and then drained into sewer. The make-up water of the heat supply system is deaerated in the deaerator, the heating agent for which is part of the steam generated in the steam boiler (see G. Delyagin Heat-generating installations, Fig. On page 40).

The disadvantage of this method is the reduced cost-effectiveness and environmental friendliness of the work due to the incomplete use of the heat of the purge water and the need to use special equipment for its disposal — continuous purge separators and heat exchanger-coolers and pollution of surface water bodies with mineralized effluents.

The closest analogue of the claimed invention is the method of operation of the heat generating installation according to patent RU 2159388, F 22 D 1/50, 11/20/2000, 3 sec., According to which steam is generated in a steam boiler, make-up water of the heating system is deaerated in the deaerator, accumulated in the boiler water mineral impurities are removed from the boiler through a purge water pipeline.

The disadvantage of this method is the reduced profitability and environmental friendliness of the work.

The technical result achieved by the present invention is to increase the efficiency and environmental friendliness of the heat generating installation by utilizing the heat of the purge water without the use of special equipment.

To achieve this result, a method for the operation of a heat generating installation is proposed, in which steam is generated in a steam boiler, make-up water of a closed heat supply system is deaerated in an atmospheric deaerator, mineral impurities accumulated in the boiler water are removed from the boiler through a purge water pipeline.

A feature of the proposed method is that the purge water is used as a heating medium for the deaerator.

Information confirming the possibility of carrying out the invention with obtaining the above technical result are as follows.

The drawing shows a diagram of a heat generating installation in which the proposed method is implemented.

The heat generating installation comprises a steam boiler 1, with a steam pipe 2 connected to it, a feed water pipe 3 and a purge water pipe 4, a network pipe 5 of a closed heat supply system with a network pump 6 and a network heater 7 connected to the steam pipe 2 through a heating medium. A make-up water pipe 8 connected to an atmospheric deaerator 9 is connected to the network pipe 5. A heating medium pipe 10 of the atmospheric deaerator 9 is connected via a heating medium to the purge pipe water 4.

The method of work consists of the following operations:

In boiler 1, steam is generated with a pressure of 4 MPa. The system water returned from consumers by the system is heated with steam in the network heater 7 and again sent to consumers via the pump 6. The make-up water of the closed heating system is deaerated in the atmospheric deaerator 9 at a pressure of 0.12 MPa and fed into the network pipeline 5. Mineral impurities accumulated in the boiler water of the boiler 1 are continuously withdrawn from the boiler drum 1 with purge water through the pipe 4 and then fed through the pipeline 10 to the atmospheric deaerator 9, where used as a heating medium. The purge water of the steam boiler 1, with a working pressure of 4 MPa, by its quality indicators can be used as a heating medium of the atmospheric deaerator of makeup water of a closed heat supply system. Heating of deaerated water to saturation temperature (in an atmospheric deaerator t = 104.3 ° C) is achieved due to a significant difference between the enthalpies and temperatures of purge and deaerated water (in high-pressure boilers, the temperature of make-up water is about 340 ° C). When supplied to the deaerator, a significant part of the purge water evaporates, that is, the deaerator includes the functions of a purge water expander. The steam generated in the deaerator from the purge water allows sufficient ventilation of the deaerator steam space.

The above information indicates that when using the claimed method the following set of conditions:

- the claimed method of operation of a heat generating installation is intended for use in industry in the field of heat power;

- for the claimed method of operation of the installation in the form described in the claims, the possibility of its implementation using the means and methods described in the application is confirmed;

- the method of operation of a heat generating installation embodying the claimed invention, when implemented, is able to achieve the desired technical result. Therefore, the claimed invention meets the condition of "industrial applicability".

Claims (1)

The method of operation of a heat generating installation, in which steam is generated in a steam boiler, heating water supply systems are deaerated in an atmospheric deaerator, mineral impurities accumulated in the boiler water are removed from the boiler through a purge water pipeline, characterized in that the purge water is used as a heating medium for an atmospheric deaerator make-up water heating system.