The method of operation of a thermal power station

 

(57) Abstract:

The invention relates to the field of power engineering and can be used in thermal power plants. To achieve this result, a method of operating thermal power station, at which the main turbine condensate successively heated in the regenerative heaters low pressure auxiliary feedwater dearyou in vacuum deaerator, which serves the heating agent, deaerated incremental feed water is mixed with the main turbine condensate before one of the regenerative heaters. As a heating agent in vacuum deaerator, use the primary turbine condensate selected after the regenerative heater, before which mix deaerated incremental feed water from the main turbine condensate. The technical result is to increase the efficiency and reliability of thermal power plants. 1 Il.

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

Known equivalent ways of operating thermal power station, for which the main turbine condensate sequence is t in vacuum deaerator, which serves the heating agent, deaerated incremental feed water is mixed with the main turbine condensate before one of the regenerative heaters, heating agent into the vacuum deaerator serves on the steam production of the turbine selection and pipeline cooled condensate production (see Oliker I. I., Permyakov Century A. Thermal deaeration of water in thermal power plants. L.: Energy, 1971, S. 130, Fig. 3-7). This analog adopted as a prototype.

Disadvantages analogs and prototypes are reduced efficiency and reliability of thermal power plants. Use as a heating agent production of condensate, chilled to a temperature of 55-60oC, does not allow for effective vacuum deaeration additional feedwater due to the low temperature condensate production, which lowers the reliability of thermal power station. Using for this purpose the pair production selection pressure of 6 kgf/cm2and more lowers the efficiency of thermal power plants due to the fact that the heat received incremental feed water from the steam high capacity displaces in regenerative podogrevom the present invention, is improving the efficiency and reliability of thermal power plants.

To achieve this result, a method of operating thermal power station, at which the main turbine condensate successively heated in the regenerative heaters low pressure auxiliary feedwater dearyou in vacuum deaerator, which serves the heating agent, deaerated incremental feed water is mixed with the main turbine condensate before one of the regenerative heaters.

The peculiarity lies in the fact that, as a heating agent in vacuum deaerator, use the primary turbine condensate selected after the regenerative heater, before which mix deaerated incremental feed water from the main turbine condensate.

A new way of operating thermal power stations can increase the reliability and efficiency of thermal power plants due to the use of vacuum deaerator heating agent with parameters sufficient for effective deaeration, and application to heat a heating agent low-grade pair of regenerative selection of low davleniyem sources, and identification of sources containing information about the equivalents of the claimed invention, has allowed to establish that the applicant had not discovered similar, characterized by signs, identical with all the essential features of the claimed invention. The definition from the list of identified unique prototype, as the most similar in essential features analogue, has identified a set of essential towards the technical result of the distinctive features set forth in the claims.

Therefore, the claimed invention meets the condition of "novelty."

To verify compliance of the claimed invention the term "inventive step", the applicant conducted an additional search of the known solutions to identify signs that match the distinctive features of the prototype of the characteristics of the claimed method. The search results showed that the claimed invention not apparent to the expert in the obvious way from the prior art because the prior art defined by the applicant, not the influence provided the essential features of the claimed invention transformations to achieve a technical result. In particular, systemai to it according to certain rules to achieve a technical result, in respect of which it is the effect of such additions.

Therefore, the claimed invention meets the condition of "inventive step".

Next, consider the information, confirming the possibility of carrying out the invention with getting the required technical result.

The drawing shows a schematic diagram of thermal power station containing steam turbine 1 with regenerative heaters low pressure 2-5 included in tract 6 of the main turbine condensate, vacuum deaerator additional feedwater 7 pipeline heating agent 8-connected path 6 of the main turbine condensate after regenerative heater 3, to which to route the main condensate turbine connected pipeline system feed incremental feed water 9.

Consider the example of implementing the inventive method of operating thermal power station.

Spent in the steam turbine 1 steam condense in the condenser, after which the main turbine condensate successively heated in the regenerative heaters low pressure 2-5. Leakage of feed water from the steam cycle heat is 7 and a temperature of 60oC is directed in the path of the main turbine condensate 6 before regenerative heater 3. In the vacuum tank 7 through the pipe 8 serves the heating agent is the main turbine condensate with a temperature of 95oC, taken after the regenerative heater 3, in front of which mix deaerated incremental feed water from the main turbine condensate, ensuring appropriate for effective deaeration of the temperature difference between the heating agent and deaerated incremental feed water. Next make the deaeration of the main condensate with incremental feed water in the deaerator high pressure and then feed pumps served in the high pressure heaters and steam boiler. Thus, the new method allows for efficient vacuum deaeration additional feedwater using as a heating agent regenerative low-grade selection of the pair, i.e., to increase the reliability and efficiency of thermal power station.

The above data confirm that the implementation of the use of the claimed method of operating thermal power stations the following cumulative conditions:

- savlon the key;

for the declared thermal power station, as it is characterized in the claims, confirmed the possibility of its implementation using the steps described in the application of tools and techniques;

- thermal power plant embodying the claimed invention, it is able to achieve the desired technical result.

Therefore, the claimed invention meets the condition of "industrial applicability".

The method of operation of a thermal power station, at which the main turbine condensate successively heated in the regenerative heaters low pressure auxiliary feedwater dearyou in vacuum deaerator, which serves the heating agent, deaerated incremental feed water is mixed with the main turbine condensate before one of the regenerative heaters, characterized in that as the heating agent in vacuum deaerator, use the primary turbine condensate selected after the regenerative heater, before which mix deaerated incremental feed water from the main turbine condensate.

 

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