RU2261335C1 - Combustion system of base of hot-water boiler plant for simultaneous generation of thermal and electric energy - Google Patents

Abstract

FIELD: heat power engineering.

SUBSTANCE: invention can be used for simultaneous generation of thermal and electric energy and can be used for modernization of existing water heating boiler plants in mini-and-heating plants. Hot water from boiler 1 is delivered along heat supply system 2 by means of system pump 3 to consumer. Flue gases are removed from boiler 1 along smoke stack 5 which accommodates heat exchanger 17 of intermediate heating circuit 15. Intermediate heat carrier is heated by flue gases and is delivered by compressor 16 into heater 7 of Stirling engine 6 where it transfers heat of exhaust gases to gaseous working medium of Stirling engine 6, Stirling engine 6 transforms received high-temperature heat into mechanical energy by means of which electric generator 11 is set into operation to generate electric energy. Make up water line 9 passes through cooler of Stirling engine 6 for cooling the engine. Delivery of make up water is provided by pump 10.

EFFECT: possibility of generation of additional electric energy, reduced cost and increased efficiency of power and heating system when water heating boiler plant is changed into mini-power-heating plant.

1 dwg

Description

The invention relates to the field of power engineering, is intended for the simultaneous generation of heat and electricity, and can be used to upgrade existing boiler houses in a mini-thermal power plant.

A device is known for an engine with an external heat supply operating according to the Stirling cycle (Stirling engine), consisting of a heater, a regenerator, a refrigerator and a piston group (Batyrev AN, Koshevarov VD, Leikin O. Yu. Ship nuclear power plants of foreign countries. - St. Petersburg: Shipbuilding, 1994, p.205).

A well-known schematic diagram of a steam-water boiler using flue gas heat, consisting of a steam boiler, an economizer for heating network water, a steam turbine with a compressor for flue exhaust gases on one shaft, a steam consumer line, a steam condenser, a condensate line and a circulation pump (E. Buznikov F., Veres A.A., Gribov V.B. Steam boilers for power plants and boiler houses.M: Energoatomizdat, 1989, pp. 160-162). However, the heat of the flue gas is not used to generate additional electrical energy.

A well-known schematic diagram of a hot water boiler house, consisting of a hot water boiler, a heat supply system for consumers with a network pump and make-up water line (D. Y. Borshchov, Design and operation of low-power heating boiler rooms. M.: Stroyizdat, 1982, pp. 10-11). However, in hot-water boiler houses, the heat of the flue gas is not used to generate additional electric energy.

The technical result that can be obtained by carrying out the invention is to generate additional electric energy, reduce the cost and increase the efficiency of the heat power system when converting a hot water boiler into a mini-thermal power plant.

To achieve this technical result, the combined system for the simultaneous production of heat and electric energy on the basis of a hot water boiler plant, consisting of a hot water boiler, a consumer heat supply system with a network pump and a make-up water line, is equipped with a Sterling engine with an electric generator on one shaft, an intermediate heating circuit, consisting of from the compressor and heat exchanger located in the chimney of the boiler plant, while the intermediate circuit passes through heating Tel Stirling engine, and a line-up water passes through a cooler of the Stirling engine.

The introduction of a combined system for the simultaneous production of heat and electric energy on the basis of a hot-water boiler plant of the Stirling engine with an electric generator and an intermediate heating circuit transferring the heat of the flue gases to the Stirling engine allows us to obtain a new property, which consists in the possibility of converting a hot-water boiler into a mini-thermal power plant due to the use of flue gas heat to drive a Stirling engine and generate electricity.

The drawing shows a combined system for the simultaneous production of thermal and electric energy based on a boiler plant.

The combined system for the simultaneous production of heat and electric energy includes a boiler 1, a heat supply system 2 with a network pump 3, a heat consumer 4, a chimney 5 of a boiler unit 1, a Stirling engine 6 with a heater 7 and a refrigerator 8. Through a refrigerator 8 of the Stirling engine 6 a makeup water line 9 passes with a pump 10. An electric generator 11 is installed on the same shaft with the Stirling engine 6. To control the flow of water through the refrigerator 8, the Stirling engine 7 is installed on line 9 and jumper 12 ootvetstvenno valves 13 and 14.

Through the heater 7 of the Stirling engine 6 passes an intermediate heating circuit 15, consisting of a compressor 16 and a heat exchanger 17 located in the chimney 5 of the boiler unit 1.

The combined system for the simultaneous production of thermal and electric energy based on a boiler plant works as follows.

Hot water from the boiler 1 through the heat supply system 2 is supplied to the consumer 4 through the network pump 3. Flue gases are removed from the boiler 1 through the chimney 5, inside which the heat exchanger 17 of the intermediate heating circuit 15 is located. In the heat exchanger 17 due to heat exchange between the flue gases intermediate heat carrier (for example, helium), the heat carrier is heated and with the help of the compressor 16 is supplied to the heater 7 of the Stirling engine 6. In the heater 7, the intermediate coolant circuit 15 through the heat exchange surface gives the heat of the exhaust gases to the gaseous working fluid of the Stirling engine 6. The Stirling engine 6 converts the obtained high-temperature heat into mechanical energy, with the help of which the electric generator 11 is brought into operation, to produce electrical energy. To cool the Stirling engine 6, a make-up water line 9 passes through its refrigerator, the supply of which is provided by the pump 10. To regulate the flow of water through the refrigerator 8 of the Stirling engine 6, valves 13 and 14 are placed on line 9 and jumper 12, respectively.

Sources of information taken into account when preparing the application:

1. Batyrev A.N., Koshevarov V.D., Leikin O.Yu. Ship nuclear power plants of foreign countries. - St. Petersburg: Shipbuilding, 1994, p. 205.

2. Buznikov E.F., Veres A.A., Gribov V.B. Steam boilers for power plants and boiler rooms. M .: Energoatomizdat, 1989, pp. 160-162).

3. Borshchov D.Ya. The device and operation of heating boilers of low power. M .: Stroyizdat, 1982, pp. 10-11 (prototype).

Claims (1)

Combined system for the simultaneous production of heat and electric energy on the basis of a hot water boiler plant, consisting of a hot water boiler, consumer heat supply system with a network pump and make-up water line, characterized in that it is equipped with a Stirling engine with an electric generator on one shaft, an intermediate heating circuit, consisting of a compressor and a heat exchanger located in the chimney of the boiler installation, while the intermediate circuit passes through the heater of the Stirling engine, and the make-up water line goes through the Stirling engine refrigerator.