RU200063U1 - WATER TREATMENT UNIT OF MAKE-UP WATER OF A THERMAL POWER PLANT - Google Patents

Abstract

The utility model relates to the field of water treatment and can be used at thermal power plants. The installation contains a unit for desalting or softening the source water, a calciner with a decarbonized water storage tank, a make-up water deaerator with a deaerated make-up water storage tank, which is connected to a make-up water pipeline with a make-up pump included in it, to the return network pipeline. water, which includes network heaters connected to the heating steam extractions of the turbine to which the condenser is connected. A feed water heater is included in the feed water pipeline, connected by a heating medium pipeline to the pipeline after the make-up water deaerator, and the cooled heating medium pipeline of the feed water heater is connected to the pipeline in front of the deaerated make-up water storage tank. A circulation pump is included in the heating medium pipeline of the feed water heater. The technical result is an increase in the efficiency of a water treatment plant for make-up water of a thermal power plant.

Description

The utility model relates to the field of water treatment and can be used at thermal power plants.

A known analogue is a water treatment plant for make-up water of a thermal power plant, containing a source water heater installed in the source water pipeline of the water treatment plant. The feed water heater is connected via a heating medium to the turbine constant pressure steam line (see patent No. SU 1267015). This analogue was adopted as a prototype.

The disadvantage of the analogue and the prototype is the reduced efficiency of the water treatment plant for the make-up water of the thermal power plant due to the use of the source water in the heater as a heating medium of a very valuable coolant - steam from the selection of constant pressure from the turbine. This leads to an under-generation of electricity by this steam and, as a consequence, to a decrease in the efficiency of the water treatment plant for make-up water of a thermal power plant.

The technical problem to be solved by the utility model is the development of a water treatment plant for make-up water for a thermal power plant.

The technical result achieved by the utility model is to increase the efficiency of the make-up water treatment plant of a thermal power plant.

To achieve this technical result, a water treatment plant for make-up water of a thermal power plant is proposed, which contains a source water heater installed in the feed water pipeline of the make-up water treatment plant.

The peculiarity lies in the fact that the pipeline of the heating medium of the feed water heater, with the circulation pump included in it, is connected to the pipeline after the make-up water deaerator, and the pipeline of the cooled heating medium from the feed water heater is connected to the pipeline in front of the tank - the accumulator of deaerated make-up water.

Next, we will consider the information confirming the possibility of implementing a utility model with obtaining the desired technical result.

The drawing shows a schematic diagram of a water treatment plant for make-up water of a thermal power plant. The installation contains included in the initial water pipeline 1 unit 2 for desalting or softening source water, a calciner 3 with a tank - an accumulator 4 of decarbonized water, a deaerator 5 of make-up water with a tank - an accumulator 6 of deaerated make-up water, which is connected by a line 7 of make-up water, with included in it feed pump 8, to the pipeline 9 of the return network water, which includes network heaters 10 connected to the heating steam extractions of the turbine 11, to which the condenser is connected 12. The feed water pipeline 1 includes a feed water heater 13 connected by a heating medium pipeline to the pipeline after the deaerator 5 make-up water, and the pipeline of the cooled heating medium of the preheater 13 of the source water is connected to the pipeline in front of the tank - the accumulator 6 of deaerated make-up water. A circulation pump 14 is included in the heating medium pipeline of the source water heater 13.

The water treatment plant for make-up water of a thermal power plant operates as follows. The water in the pipeline 1 of the source water is heated to 10-15 ° C by the exhaust steam of the turbine 11 in the condenser 12, then the water is supplied to the heater 13 of the source water, where it is heated to the technologically required temperature of 30-40 ° C with deaerated make-up water. The heated water in the source water heater 13 is supplied to the unit 2 for desalting or softening water, after which it enters the calciner 3, then after the storage tank 4 of the decarbonated water is supplied for deaeration to the make-up water deaerator 5. Further, the deaerated make-up water enters the storage tank 6, from which it flows through the make-up water pipeline 7 with the help of the make-up pump 8 into the return water line 9. The use of make-up water as a heating medium in the heater 13 of the initial water makes it possible to exclude the consumption of steam for the extraction of the turbine for heating the initial water and to use this steam for additional power generation.

Thus, the new interconnection of the elements makes it possible to increase the efficiency of the make-up water treatment plant of the thermal power plant.

Claims (1)

A water treatment plant for make-up water of a thermal power plant, containing a source water heater installed in the feed water pipeline of the water treatment plant, characterized in that the heating medium pipeline of the feed water heater, with a circulation pump included in it, is connected to the pipeline after the make-up water deaerator, and the cooled heating pipeline the medium from the feed water heater is connected to the pipeline in front of the tank - the accumulator of deaerated make-up water.

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