Steam power plant with additional steam turbines

FIELD: heat supply systems.

SUBSTANCE: proposed steam power plant with additional steam turbines includes power-and-heating plant with open power and heat supply system, gas-turbine plant with recovery boiler and make-up water heating and deaerating unit including at least two additional steam turbines with contact condensers which are placed in softened make up water line. Output of power and heating plant unit is connected by pipeline with input of contact condensers of additional steam turbines of make up water heating and deaerating unit. Output of steam recovery boiler unit of gas-turbine plant unit is connected by steam line with input of additional steam turbines. Input of steam recovery is connected by feed water pipeline with make up water heating and deaerating unit. Output of make up water heating and deaerating unit is connected by make up deaerated water pipeline with system heaters of power and heating plant unit and by feed water pipeline, with input of recovery boiler of gas-turbine plant.

EFFECT: facilitated deaeration and reduced cost of make up water deaeration system of heat supply system increased power and economy of power and heating plant.

2 dwg

 

Steam power plant with an additional steam turbines relates to the field of energy and can be used in cogeneration plants for co-production of electricity and thermal energy.

Well-known combined with additional steam turbines, containing cogeneration turbines, open cogeneration system, treatment plant make-up water heating systems including installation of softening raw water and vacuum deaerators make-up water. The entrance of the vacuum deaerator according softened decarbonising water is connected by a pipeline with the installation of water softening, and warming the water piped to the direct pipeline network open water cogeneration system. [Oliker I.I., Ivanov V.E., Sivko, H.E. New schemes deaeration of water power plant with two-stage vacuum deaerators, journal CKTI// thermal engineering. 1972, No. 4, p.44-47.]

Softened and decarbonisation, makeup water is described combined heat and power is fed into the vacuum deaerators with the temperature at 30°that leads to poor deaeration process, to increase the flow of heating water on the vacuum deaerators and power consumption for own needs of the plant.

Closest to the technical essence is combined with an open replicationdefective, containing the cogeneration turbine, double extraction the extraction steam. Capacitors these turbines embedded and main beams. Built-in beams of capacitors at the input connected to the raw water pipelines, and the output is piped to install its softening, the output of which is connected by a pipe softened and decarbonizing make-up water to the entrance of the vacuum deaerator. The inlet of the deaerator is connected by piping heating water with a direct pipeline network open water cogeneration system [Veerapol. Preparation of make-up water heating systems using vacuum deaerators. - M.: Energoatomizdat, 1996. RES., p.137].

In the described combined heat and power with an open heating system heated raw water before installing it softening produce embedded beams turbine condenser to a temperature of 35-50°and heating water heating for vacuum deaerators are in the lower and upper network heaters turbines.

In this installation, there is a need to use a vacuum deaerators, heat water which is supplied from a straight line heating system that reduces the consumption of network water to heat consumers and thermal capacity of the heating plant. In addition, warming water Vacu is mnih deaerators choked in front of them, which leads to waste of energy on its pumping.

The objective of the proposed technical solution is to upgrade to simplify and reduce the cost of the system deaeration of makeup water heating systems to increase the capacity and efficiency of this power plant.

This goal is achieved due to the fact that steam power plant with an additional steam turbines made of three blocks: block heating plant with an open heating system and cogeneration steam turbine with extraction the extraction steam condenser with built-in beam, generator, grid heaters, pipelines reverse and direct a network of water pipelines softened and decarbonizing make-up water; additional block with at least one energy gas turbine with a steam recovery boiler and generator, and an auxiliary heating and deaeration of makeup water, which contains at least two additional steam turbine generators and contact condensers included in the line softened makeup water; the output of combined heat and power unit with an open heating system piped to the input pin of the additional capacitors steam turbines heating unit and de is arachi make-up water, exit steam boiler unit gas turbine connected to the steam line to the input of an additional steam turbine, and its input is connected to the feedwater pipeline with a block heating and deaeration of makeup water; output block heating and deaeration of makeup water piped deaerated make-up water through make-up and network pumps with a network of heaters combined heat and power unit with an open heating system, in addition, its output is connected by a pipe feed water through the treatment plant nutrient and water pump, heating unit and deaeration of makeup water to the entrance of the boiler of the gas turbine installation.

The use of the modernized power plant at least two additional steam turbines, equipped with the contact condensers and fed by the steam produced by the recovery boiler installed for an additional gas turbine installation, allows the capacitors of these steam turbines both parallel and sequential heating and vacuum deaeration of makeup water heating systems. This increases the quality of deaeration of makeup water.

Electricity generation in these generators steam turbines operating in condensing mode using the m heat of exhaust steam for heating make-up water, allows to upgrade the plant with an open heating system, to increase its electric and thermal power, improve its thermal efficiency.

The use of an additional gas turbine with an electric generator and a steam recovery boiler, using as feed water part softened and deaerated make-up water, can further increase the electric power combined heat and power, while the steam generation heat recovery boiler allows you to supply additional steam turbines.

You can perform serial or parallel connection contact condensers heated make-up water heating system, which improves the efficiency of heat when changing the water consumption for the hot water supply from open cogeneration system.

Figure 1 shows a block diagram of the steam power plant with an additional steam turbines, and figure 2 shows its schematic diagram.

The block diagram in figure 1 consists of three blocks: plant with an open heating system 1; gas turbine with heat recovery boiler 2; block heating and deaeration of makeup water 3.

Figure 2 is a schematic diagram of steam power plant with additional the additional steam turbines, where the combined heat and power unit with an open heating system 1 includes cogeneration steam turbine 4, a condenser with built-in beam 5, the pipeline softened and decarbonizing make-up water 6, the bottom 7 and top 8 network heaters, piping straight line heating system 9, the pipe return line heating system 10, a charging pump 11, the network pump 12, the pipeline deaerated makeup water 13.

Unit gas turbine with heat recovery boiler 2 contains the gas-turbine unit with a generator 14, a steam boiler 15, the steam line 16.

Block heating and deaeration of makeup water 3 contains an additional steam turbine 17 and 18 with power, contact condensers 19, condensate pumps 20 and 21, the pipeline softened make-up water 22 with stop valve, the bypass line 23 is deaerated make-up water with shutoff valves, prefabricated piping make-up water 24, the feedwater pipeline 25, the treatment plant feedwater 26, the feedwater pipeline 27 with a nutrient pump.

Steam power plant with an additional steam turbines performed as follows.

Built-beam condenser 5 cogeneration steam turbine 4 unit 1 is connected on the input raw water pipeline, and the output is connected to what Truboprovod softened and decarbonizing make-up water 6 through the installation of softening with the inlet make-up water contact condensers 19 steam turbines 17 and 18 of block 3.

The entrance of the steam boiler 15, placed in the exhaust duct of a gas turbine 14 unit 2 is connected to the unit 1 feedwater pipeline 25 through the treatment plant feedwater 26 and pump 27 unit 3. The output of the waste heat boiler 15 is connected by a steam line 16 to the inputs of an additional condensing steam turbines 17 and 18 of block 3.

Pipeline return line heating system 10 through the network pump 12, the bottom 7 and top 8 network heaters associated with the pipeline straight line heat 9 combined heat and power unit with an open heating system 1. Pipeline return line heating system 10 through the feed pump 11 and the tank battery is connected to the pipeline deaerated makeup water 13 unit 3.

Contact condensers 19 steam turbines 17 and 18 are connected by pipeline softened make-up water 22 with stop valve and through the pipe softened and decarbonizing make-up water 6 with integrated beam condenser 5 cogeneration steam turbine 4 of the block 1. The output pin of the capacitor 19 of the steam turbine 17 is connected through a condensate pump 20 one by-pass pipeline deaerated makeup water 23 with shutoff valves to the input pin of the capacitor 19 of the steam turbine 18, and a second pipeline through prefabricated piping make-up water caadian with pipeline deaerated makeup water 13 unit 3. The output pin of the capacitor 19 of the steam turbine 18 is connected through a condensate pump 21 and through prefabricated piping make-up water 24 pipeline deaerated makeup water 13 unit 3.

Steam power plant with an additional steam turbine operates as follows.

Spent in cogeneration turbine 4 steam enters the condenser 5 and operates in the internal beam of the capacitor heated raw water, then served after softening and decarbonization in the pipeline 6 softened and decarbonizing make-up water.

Pipeline 6 softened and decarbonizing makeup water makeup water is supplied to the capacitor 19, which receives exhaust steam auxiliary steam turbines 17 and 18 and where the condensation of the steam. Due to heat transfer from the condensing steam to the feed water is heated. Non-condensable gases are removed from the capacitor 19 through the eductor systems. As a result, the capacitor 19 is vacuum deaeration of makeup water. Depending on the mode of operation open cogeneration system and flow of her customers different amounts of water for the hot water has the possibility of parallel or series connection of the capacitors 19 to podpitat the Oh water. When parallel operation of locking the body at line 22 softened make-up water is open and the stop valve on the bypass pipe deaerated makeup water 23 is closed. The sequential inclusion of the capacitors 19 to feed water shut-off body at line 22 softened make-up water is closed and the stop valve on the bypass line 23 is deaerated make-up water is open. Deaerated, heated makeup water from the capacitor 19 through the condensate pumps 20 and 21 and through a collecting pipe 24 make-up water enters the pipe 13 deaerated make-up water unit 3, and through tank accumulator and a charging pump 11 is fed in the reverse pipeline network of water 10. Part of the make-up water pipeline 25 of the feed water through the treatment plant feedwater 26 and pump 27 is input to the boiler 15. Network water from the reverse pipeline network water network 10 by pump 12 is fed through the bottom 7 and top 8 network heaters in the pipeline direct water network 9. At the bottom 7 and top 8 network the heater is heating network water heating steam from heat cogeneration turbine 4.

Additional gas turbine unit 14 drives the electric generator and more the power generation. By utilizing the heat of exhaust gases of a gas turbine 14 in the exhaust-heat boiler 15 is generated pairs sent to a steam line 16 to the input of an additional steam turbine 17 and 18. Spent them in pairs to the input pin of the capacitor 19 steam turbines 17 and 18.

The proposed layout of steam power plant with an open heating system has advantages over the known analogues, and before the prototype.

It is additionally located in at least one energy gas turbine with a steam recovery boiler and at least two condensing steam turbine generators and contact condensers. There is a possibility of their inclusion in the line of feed of softened water with parallel or sequential pass through them make-up water. High flow feed water softened water is divided into two streams. Each of the threads is served in a contact condenser, condenses the exhaust steam, heated and deaeribed. In the modes with reduced costs of make-up water present technical solution provides a series connection contact of the capacitors in the line of softened makeup water, which results in an additional increase in temperature make-up water and its deaerat who I am.

High flow feed water softened water is divided into two streams. Each of the threads is served in a contact condenser, condenses the exhaust steam, heated and deaeribed. In the modes with reduced costs of make-up water present technical solution provides a series connection contact of the capacitors in the line of softened makeup water, which results in an additional increase in temperature make-up water and deaeration.

In comparison with the known schemes, including the prototype, due to this, the proposed solution provides increased electrical power and thermal efficiency of the modernized power plant with an open heating system.

Steam power plant with an additional steam turbines made of three blocks: the combined heat and power with an open heating system and cogeneration steam turbine with extraction the extraction steam condenser with built-in beam, generator, grid heaters, pipelines reverse and direct a network of water pipelines softened and decarbonizing make-up water; additional block with at least one energy gas turbine with a steam boiler-utilize what'or, and a generator, and an auxiliary heating and deaeration of makeup water, which contains at least two additional steam turbine generators and contact condensers included in the line softened makeup water; the output of combined heat and power unit with an open heating system piped to the input contact condensers additional steam turbine unit heating and deaeration of makeup water, the steam output of the boiler unit gas turbine connected to the steam line to the input of an additional steam turbine, and its input is connected to the feedwater pipeline with a block heating and deaeration of makeup water; output block heating and deaeration of makeup water connected pipeline deaerated make-up water through make-up and network pumps with a network of heaters combined heat and power unit with an open heating system, in addition, its output is connected by a pipe feed water through the treatment plant feed water and feed pump unit heating and deaeration of makeup water to the entrance of the boiler of the gas turbine installation.



 

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