Combined heat supply system

FIELD: heating.

SUBSTANCE: present invention pertains to heat-and-power engineering and can be used in combined heat supply systems. The combined heat supply system has a thermal gas-turbine, gas-piston or steam electricity generating unit with heat exchangers - heat utilisers, cooling water and exhaust gases, which are included in the heat supply circuit of the heat consumer with heating systems and hot water supply. After the heat exchanger, the exhaust gases heat utilisers along the channel of exhaust gases, there is series-connection of a gas furnace and process load of hot gas - driers, burning and/or thermal installations. In the circuit of the heat supplier, there is an air heat exchanger for heating air coming into the gas furnace. The heat exchanger - exhaust gases heat utiliser along the channel of exhaust gases has a bypass-channel.

EFFECT: increased utilisation of waste heat and efficiency of thermal process, using hot gases.

1 cl, 1 dwg

 

The invention relates to the field of power engineering and can be used in combined heat and power systems to increase the efficiency of utilization of waste heat and the efficiency of production processes using hot gases, mainly drying, baking and/or heat settings.

The prior art combined heat and power system containing thermal gas turbine or gas engine power plant with heat exchangers-heat recovery steam generators heat of cooling water and exhaust gases, which are included in the circuit of the heat consumer heat with heating and hot water supply (see Thermal equipment and heat supply of industrial enterprises. Ed. Bungalowbau. M., "Energy", 1979, s-244). The main disadvantage is the low efficiency of the heat of the exhaust gases due to the low coefficient of heat transfer from the gases to the water.

The invention is aimed at improving the efficiency of utilization of recyclable waste heat and the efficiency of production processes using hot gases, predominantly in the drying, baking and/or heat settings.

The solution of this problem is provided by the fact that in the combined system Teploenergetika the supply, containing a thermal power plant, in which energy is burned in the combustion chamber of the gas is converted into mechanical work, heat exchangers-heat recovery steam generators heat of cooling water and exhaust gases, which are included in the circuit of the heat consumer heat with heating and hot water supply, according to the invention after heat-exchanger of the heat of the exhaust gases along the line of flue gas series gas oven and technological consumers of hot gas, the heat exchanger of heat of exhaust gases in line of exhaust gases supplied bypass - bypass - line with shut-off and control valves, and in loop heating included air heat exchanger to preheat the incoming gas oven air.

The on-line flue gas series gas furnace that receives hot exhaust gas, and processing plants operating in the hot gas significantly increases the effectiveness of heat recovery from exhaust gases of gas turbine, gas or combined-cycle thermal power plant and waste heat in General, and the effectiveness and efficiency of gas furnaces, servicing industrial drying, baking, heat, etc. installation.

The drawing schematically before is submitted to the General view of the combined system of heat and power.

Combined heat and power system contains a thermal power plant 1, in which energy is burned in the combustion chamber of the gas is converted into mechanical work, such as gas turbine, gas or combined-cycle thermal power plant, with heat exchanger-heat exchanger 2 of the heat of cooling water and heat exchanger-a heat exchanger 3 of the exhaust gases, which are included in the circuit 4 heat consumer heat 5 with heating and hot water supply (not shown), sequentially enabled after a heat-exchanger 3 heat of exhaust gases in line 6 of the exhaust gases of a gas furnace 7 and technological consumers 8 hot gas, mostly drying, baking and/or heat installation. In addition, in the circuit 4 of the heat added to air heat exchanger 9 to preheat the incoming gas furnace 7 air, and the heat exchanger, heat 3 heat of the exhaust gases along the line of exhaust gases supplied bypass - bypass - road (bridge) 10-off and control valves (valves) 11.

Combined heat and power system operates as follows.

Thermal gas turbine, gas or combined cycle power plant 1 produces electricity through the heating circuit 4, utilizing waste heat, both of which provides warmth heating system and hot water consumer 5 of warmth. Depending on the required technological considerations temperature, which is regulated by a valve 11, the exhaust gases after the heat-exchanger 3 heat of the exhaust gases and/or by-pass by - pass - line (jumper) 10 enter on line 6 of the exhaust gases in a gas furnace 7, where also the pipe 12 serves heated in the air heat exchanger 9 air and pipeline 13 - fuel. Formed in the gas furnace 7 combustion products - hot gases, mixed with hot exhaust gases through the pipeline 14 is directed to process consumers 8 in the drying, baking and/or heat settings.

Combined heat and power system containing a thermal power plant, in which energy is burned in the combustion chamber of the gas is converted into mechanical work, heat exchangers-heat recovery steam generators heat of cooling water and exhaust gases, which are included in the circuit of the heat consumer heat with heating and hot water, characterized in that after the heat-exchanger of the heat of the exhaust gases along the line of flue gas series gas oven and technological consumers of hot gas, the heat exchanger of heat of exhaust gases in line of exhaust gases supplied bypass - bypass - MAG is straley with shut-off and control valves, and in loop heating included air heat exchanger to preheat the incoming gas furnace air.



 

Same patents:

FIELD: heating.

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FIELD: heat power industry.

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FIELD: mechanic, energetic.

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FIELD: power engineering.

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2 dwg

FIELD: power engineering.

SUBSTANCE: system has boiler, steam turbine, electric generator, deaerator and feeding pump, and additionally has steam-gas turbine plant block with low pressure burning chamber, steam-gas mixture heat utilization block and block for using separated water. Block for utilization of heat of steam-gas mixture has utilization boiler with steam generator of high pressure and additional low-pressure steam generator. Block for using separated water via low pressure nutritious water pipeline is connected to input of low pressure steam generator of utilization boiler and via irrigation water pipeline is connected to irrigation device of steam-gas mixture heat utilization block. Input of high pressure steam generator of utilization boiler is connected via steam-gas mixture pipeline to output of steam-gas turbine plant. Low-pressure steam generator of utilization boiler is connected via low-pressure steam pipeline to additional combustion chamber of gas-steam turbine plant. Block for using separated water via pipelines for low-pressure nutritious water, irrigation water and separated water is connected to steam-gas mixture heat utilization block, and via softened heated and deaerated nutritious water pipeline - to base heat and electricity main line. High-pressure steam generator is connected via high-pressure nutritious water pipeline and high-pressure steam pipeline to base main line.

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2 dwg

FIELD: power engineering.

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EFFECT: higher efficiency.

2 dwg

FIELD: power engineering.

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EFFECT: higher efficiency.

2 dwg

FIELD: heat power engineering.

SUBSTANCE: according to proposed method system water is heated in system heaters by steam of heating extractions of extraction turbine. Make up water of heat supply system is deaerated before delivering into return pipeline. For this purpose source and overheated water is delivered into deaerator. Maintaining of preset concentration of oxygen dissolved in deaerated make up water is provided by successive regulation of temperature of source water and rate of flash steam. If concentration of dissolved oxygen exceeds preset value, first, temperature of source water is raised and then, if necessary, rate of flash steam is increased and on the contrary, if concentration of oxygen is lower than preset value, first rate of flash steam is reduced and then temperature of source water.

EFFECT: increased efficiency and economy of thermal power station.

1 dwg

FIELD: power and heat generation.

SUBSTANCE: proposed power and heating plant with open power and heat supply system including boiler unit, steam turbine, deaerator and feed pump includes steam-gas turbine plant unit with low-pressure afterburning chamber, steam gas mixture heat recovery unit containing recovery boiler with high-and-pressure steam generators, spraying device, gas cooler-condenser and separated water utilization unit. Separated water utilization unit is connected with input of low-pressure steam generator of recovery boiler through water softening set and deaerator. Spraying device is connected with raw water softening device of power and heating plant. Input of high-pressure steam generator of recovery boiler is connected with output of steam-gas-turbine plant. Low-pressure steam generator of recovery boiler is connected with additional afterburning chamber of steam-gas turbine plant. Separated water utilization unit is connected by pipeline of softened and deaerated low-pressure feed water with steam-gas mixture heat recovery unit and pipeline of softened, heated and deaerated make-up water with open power and heat supply system. High-pressure steam generator is connected by feed water and steam pipelines with power and heating plant.

EFFECT: provision of effective modernization of steam turbine power and heating plants with increase of power and economy.

2 dwg

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