BG2047U1 - Thermal power plant with absorption lithium bromide refrigerating machine operating as a heat pump - Google Patents

Abstract

Thermal power plant with an absorption lithium bromide refrigerating machine (ALBRМ) operating as а heat рumр. @ The utility model relates to electrical power engineering, namely thermal power plant with аn absorption lithium bromide refrigerating machine operating as а heat рumр included into its process flow. @ The thermal power plant integrating absorption lithium bromide refrigerating machine 1 connected to heating medium loop 2, cooling medium loop 7, connected to external and internal cold consumers 9 and 10, characterized in that the absorption lithium bromide refrigerating machine includes coolant loop 11, combined with the water treatment (heating) loop for thermal power plant consumers' heat supply systems and in-house load of the power plant. @ The engineering result is provision of stable year round operation of plant's process equipment cooling systems with the minimum external heat loss, eliminating technological electric power and electric energy generation constraints both in the winter and summer period, and improving overall thermal power plant's performance indicators. @@

Description

Field of application

The utility model refers to a thermal power plant with an absorption cooling machine with lithium bromide, acting as a heat pump and involved in the production process of electricity.

BACKGROUND OF THE INVENTION

A thermal power plant with an absorption cooling machine with lithium bromide is known, which machine is connected to the condenser of the steam turbine of the thermal power plant. This thermal power plant does not use the possibility of the thermal power plant to use low level heat (JP 2007322028).

A thermal power plant with an absorption cooling machine with lithium bromide is known, connected to a coolant circuit with additional steam heating of the coolant and an open coolant circuit connected to the circulation circuit of the process water supply system. This thermal power plant with an absorption cooling machine with lithium bromide also does not use the thermal power of the plant to the full extent, which reduces its capabilities (RU 62166).

The closest solution (prototype) to the essence of the proposed utility model is a thermal power plant with an absorption cooling machine with lithium bromide, connected to a heat carrier circuit and a cooling circuit. The cooler circuit, in turn, is connected to external and internal cold consumers. The coolant circuit is open and is connected to the atmosphere through the cooling tower, and the coolant circuit is closed and is integrated into the production process of the thermal power plant through an intermediate circuit (RU 119394).

The use of the known plant in the production process reduces the heat emitted by the plant, as well as the efficient year-round operation of the absorption cooling machine with lithium bromide, limiting it to the summer season.

Technical essence of the utility model

The task of the utility model is to create a thermal power plant with an absorption cooling machine with lithium bromide, improving the reliability and efficiency of the thermal power plant by integrating the absorption cooling machine with lithium bromide in the production process of the plant throughout the year. reduced external heat losses.

The problem is solved with a thermal power plant with an absorption cooling machine with lithium bromide, connected to a coolant circuit and to a refrigerant circuit, which is connected to external and internal cold consumers. The cooler circuit is also connected to a cooling tower. According to the utility model, the cooler circuit is closed, and the lithium bromide absorption cooling machine also includes a cooling circuit combined with a water heating circuit. To the external and internal cold consumers a circulation circuit for technical water is provided, connected to the cooling tower.

According to one embodiment of the utility model, the cooler circuit is provided with means for dependent and independent connection with the external and internal cold users.

The advantages of the requested plant are the realized double effect, consisting not only in stable operation of the cooling system, regardless of climatic conditions, removing the existing restrictions for electricity and energy production in winter and summer, but also in the utilization of heat released. in the cooling system of the production equipment (heat pump operation mode).

The efficiency of the absorption cooling machine with lithium bromide, used as part of the production process of the thermal power plant, has been increased, which is achieved thanks to the maximum utilization of unused heat, as well as the possibility for economical year-round operation of the production process. useful model.

Stable year-round operation of the cooling systems in the production process of the plant with minimal external loss is also ensured.

2047 Ul of heat, eliminating the technological limitations for generating electricity and electricity in both winter and summer, and improving the overall performance of the thermal power plant. 5 The minimization of external heat losses is achieved due to the utilization of unused heat from the cooling systems of the equipment of the water treatment plant (heating) for the systems for heat supply to the users of the thermal power plant and the internal needs of the plant.

One of the distinguishing features of the utility model according to the utility model is its flexibility provided by the ability of the absorption lithium bromide cooling machine to operate in a wide range of cooling capacity regulation with different heat carriers, coolers and cooler temperature levels. This function requires adjustment of the cooling circuits 20 connected to the machine to achieve the most suitable cooling water temperature. The correction can be done through a modern automated control system (including controller, control valves, measuring 25 devices and sensors, and other automation equipment).

Another important effect of the proposed utility model is the ability to maintain the most appropriate mode of the cooling system of the 30 production equipment of the thermal power plant due to providing the necessary parameters of the cooler, regardless of climatic conditions. Given that these requirements are different for each type of 35 equipment connected to the technical water supply systems, the standard technical water supply systems for the plant related to the environment through cooling towers do not require the determination of 40 individual parameters of the cooler (especially its temperature) for coolers of different types of cooling equipment, significantly reducing the efficiency and safety of the technological equipment during both the winter and the summer period.

Explanation of the attached figure

An exemplary embodiment of the utility model is shown in the attached figure 1, which 5θ is a diagram of the thermal power plant.

Example implementation and application of the utility model

The thermal power plant is made of an absorption cooling machine 1 with lithium bromide connected to a heat carrier circuit 2 which is heated by steam by extraction of a steam turbine (steam supplied by a boiler) and a cooling circuit 7 connected to cold internal consumers 9 and external 10.

The absorption cooling machine with lithium bromide 1 is integrated in the production process of the plant through:

- the circuit of the heat carrier 2 is connected to the steam pipes 3 of the plant. The steam condensate 5 is released into the condensate collector system of the plant;

- the cooler circuit 7 can be connected to an intermediate cooler 8 as well as directly to the local cooling system for the plant equipment (internal consumers 9) and to the external cold consumers 10. A circulation circuit 6 is provided to the plant to provide technical water. of the plant, as well as cooling tower 13;

- through a cooling circuit 11 to the water treatment system for heat supply to the consumers of the thermal power plant and the internal needs of the power plant.

During the operation of the thermal power plant, the flow of water for the heat supply systems to the consumers of the thermal power plant and for the internal needs of the power plant is directed to an absorption cooling machine 1 with lithium bromide, where it is heated in a condenser 12 and an absorber. In the circuit of the heat carrier 2, the latter is heated by the heat energy of the steam pipes 3 for supplying steam to the steam boiler and the outlet pipes 4 of the steam turbine. The steam condensate 5 is released into the condensate collector system of the plant.

The cooler circulating in the circuit 7, which circuit is closed, is simultaneously cooled in an absorption cooling machine 1 with lithium bromide and directed to the external cold consumers 10.

Thus, the distinction of

And independent cooling systems ensures lowering the temperature of the cooling water in the protected technical water system of the plant during the winter below the thresholds specified in the requirements for operation of the turbogenerator cooler, and obtaining the maximum vacuum in the turbine condensers, increasing the power of the turbine.

During the summer period, at high air temperatures and reduced power, the technical water supply system of the plant, the above-described sectioning not only excludes any restrictions on the power of the turbine unit and electricity production caused by insufficient cooling of technological equipment, but also ensures production. of additional electricity by reducing the load on the technical water supply system of the plant, thus reducing 20 the temperature of the internal cooling water, increasing the volume of vacuum in the condenser 12 and the power of the turbine.

The circuit of the cooler 7 can be connected depending via a heat exchanger 8 or 25 can be independently connected to the internal 9 and external 10 cold consumers, which users can be designed as heat exchangers. To ensure reliable and continuous cooling of cold consumers 3 0 9 and 10, as a backup system is used

U1 the circulation circuit 6 for technical water of the plant, connected to the cooling tower 13.

The cycle for purification of water for heat supply (supply of hot water for 5 domestic needs, heating, ventilation) for the users of the thermal power plant and the internal needs of the power plant is used by the absorption cooling machine 1 with lithium bromide as cooling circuit.

Claims (2)

Claims A thermal power plant with an absorption cooling machine (1) with lithium bromide connected to a coolant circuit (2) and to a 15 coolant circuit (7) which is connected to internal (9) and external (10) cold consumers, such as is also connected to a cooling tower (13), characterized in that the cooler circuit (7) is closed, and the lithium bromide absorption cooling machine (1) also includes a cooling circuit (11) combined with a water heating circuit. , and to the internal (9) and external (10) cold consumers a circulation circuit (6) for technical water is provided, connected to the cooling tower (13). Power plant according to claim 1, characterized in that the cooling circuit (7) is provided with means for dependent and independent connection with the internal (9) and external (10) cold consumers.