The method of converting thermal energy into mechanical energy and getprotobyname installation for its implementation

 

The invention relates to the field of energy. The method of converting thermal energy into mechanical energy, comprising the processes of compression of air, followed by separation of its primary and secondary, the flow of primary air and fuel in the primary zone of the combustion chamber for combustion with the formation of combustion products that are mixed with steam-air mixture with the formation of the vapor-gas mixture, converting its potential energy into mechanical energy. The heat of the exhaust gas mixture (exhaust gas) is disposed in the exhaust-heat boiler with the formation of superheated steam flow in the secondary zone of the combustion chamber and saturated water. Additionally cooled exhaust gases from the condensation of water vapor, serves the condensate in the boiler and the saturated water in teplomassoobmennyh, which after partial evaporation and cooling systems divert from teplomassoobmennyh and mixed with the condensate. As fuel use fuel gas, which lead through a system of regulating the supply of fuel gas to teplomassoobmennyh, the output of which is connected to the primary zone of the combustion chamber. The invention allows deep to utilize the heat of exhaust gases, to increase the economy is s, 1 Il.

The invention relates to energy, and in particular to getprotobyname installations, and can be used in the design of new and modernization of existing getprotobyname installations.

As adopted similar method of converting thermal energy into mechanical energy, comprising: compression of air, the combustion of hydrocarbon fuel, a mixture of the products of combustion with water vapor, changes in work potential energy of gas-steam mixture while it is expanding the utilization of heat from the exhaust gases when they are cooled with the formation of superheated water vapor, additional cooling of the exhaust gases by condensation of steams them, feeding the obtained condensate in the boiler (see the patent of Ukraine 151570).

The known method has the disadvantage, which is that the exhaust gases after disposing of their heat recovery boiler have a high temperature (not lower than 160-170oC), which significantly reduces the efficiency getprotobyname installation and at the same time greatly complicates the process of condensation of water vapor from the exhaust gas.

As the prototype accepted way of working energy Astondoa and fuel in the primary zone of the combustion chamber for combustion with the formation of products of combustion, the flow of superheated steam in the secondary zone of the combustion chamber, the mixture of steam-air mixture with the products of combustion with the formation of the vapor-gas mixture, converting its potential energy into mechanical energy, heat recovery from exhaust gas mixture (exhaust gas) in the HRSG with the formation of superheated steam flow in the secondary zone of the combustion chamber and saturated water for additional cooling of the exhaust gases by condensation of water vapor, feeding the condensate to the boiler and supply of saturated water in teplomassoobmennyh, which after partial evaporation and cooling air flow is selected for the compressor away from teplomassoobmennyh and mixed with the condensate, and the resulting humidified air (air-steam mixture) serves in the secondary zone of the combustion chamber (see SU 1830421 A1, F 01 To 21/04, 30.07.1993).

As a prototype adopted getprotobyname installation comprising an air compressor with a compression chamber containing a primary zone with a supply of fuel gas and secondary zone and with gas turbine associated with the consumer of mechanical energy, and sequentially arranged in the direction of the exhaust gas boiler with buchou boiler, and teplomassoobmennyh that his entrance on the water connected to the drum separator and out of the water to the deaerator (see SU 1830421 A1, F 01 To 21/04, 30.07.1993).

The known method has the following disadvantages: - mixing of compressed air saturated with water, it significantly cools down (approximately 500oWith up to 220-240o(C) that, despite his heated in the composition of the vapor mixture of the exhaust gases, requires additional fuel costs for the heating in the combustion chamber; - due to the reduced superheat the steam in the recovery boiler due to transfer part of the heat of exhaust gases steam-air mixture reduces the efficiency getprotobyname installation; - due to the small difference in pressure between the cavities for the compressor and the combustion chamber requires additional compression of the extracted compressed air to push it through teplomassoobmennyh and heater steam-air mixture, which requires additional costs of operation and thereby affects economic and performance indicators getprotobyname installation.

The invention solves the problem of creating a method for converting thermal energy into mechanical energy by expanding the utilization of heat from the exhaust gases when not Rinnai installation and reduces heat and toxic impact on the environment.

The problem is solved in that in the method of converting thermal energy into mechanical energy, comprising the processes of compression of air, followed by separation of its primary and secondary, the flow of primary air and fuel in the primary zone of the combustion chamber for combustion with the formation of combustion products that are mixed with steam-air mixture with the formation of the vapor-gas mixture, converting its potential energy into mechanical energy, heat recovery from exhaust gas mixture (exhaust gas) in the HRSG with the formation of superheated steam flow in the secondary zone of the combustion chamber and saturated water, further cooling the exhaust gases by condensation of water vapor, feeding the condensate to the boiler and supply of saturated water in teplomassoobmennyh, which after partial evaporation and cooling systems divert from teplomassoobmennyh and mixed with the condensate according to the invention in use as a fuel for the fuel gas before it enters the combustion chamber is introduced into contact with saturated water, heated and humidified with water vapor formed by the partial evaporation of water, and the secondary air is mixed with superheated steam with the formation of Stosny compressor with the combustion chamber, containing a primary zone with a supply of fuel gas and secondary zone and with gas turbine associated with the consumer of mechanical energy, and sequentially arranged in the direction of the exhaust gas boiler drum-separator and condenser, which is the output of the condensate through the tank and the pump is connected to the input of the boiler, as well as teplomassoobmennyh that his entrance on the water connected to the drum separator and out of the water to the deaerator, according to the invention in use as a fuel for the fuel gas, which lead through a system of regulating the supply of fuel gas to teplomassoobmennyh, the output of which is connected to the primary zone of the combustion chamber.

A new set of essential features missing in the known technical solutions and provides the following advantages.

1. Due to the fact that gas constant fuel gas compared with air is more than 1.7 times, can significantly reduce the temperature of the chilled water leaving teplomassoobmennyh at the same flow rate through a gas environment. This greatly intensifies the heat of the exhaust gas and thereby increases to the (C) in contact with saturated water teplomassoobmennyh significantly reduces the cost of fuel in the combustion chamber, which further increases the efficiency getprotobyname installation.

3. It is known that the supply of steam as an inert gas in the combustion zone (primary zone), especially if it is pre-mixed with the fuel gas in the tens and even hundreds of times more effective impact on reducing the formation of nitrogen oxides compared to feeding it into the secondary zone. Therefore, the mixing of the steam with the fuel gas in teplomassoobmennyh simultaneously solves the environmental problem.

The drawing shows a heat flow diagram getprotobyname installation that implements the proposed method.

Getprotobyname plant comprises an air compressor 1, a combustion chamber 2 with the primary and secondary zones, gas-steam turbine 3, associated with the consumer of mechanical energy 4 and sequentially arranged in the direction of the exhaust gas boiler 5 with drum separator 6 and the capacitor 7, which is the output of water through the tank 8 and the pump 9 is connected to the input of the boiler 5. Getprotobyname the installation also contains teplomassoobmennyh 10, which has its entrance on the water connected to the drum separator 6 of the waste heat boiler 5, and output to the deaerator 8 and then through the pump 9 to the inlet of the boiler 5. Oghaza in getprotobyname installation, and their output gas mixture is connected to the primary zone of the combustion chamber 2.

The method is performed getprotobyname installation as follows.

Atmospheric air is compressed in the compressor 1 and is divided into two streams: primary and secondary, which are directed into the combustion chamber 2, respectively, in its primary and secondary zones. At the same time in the secondary zone of the combustion chamber 2 serves steam from the boiler 5 and is mixed with secondary air, and formed a steam-air mixture is mixed with the combustion products obtained in the primary zone. The obtained gas-vapor mixture is directed into the gas turbine, where it expands, transforming its thermal energy into mechanical energy, which is passed to the consumer 4. The exhaust gas turbine 3 gas-steam mixture (exhaust gas) is sent to the boiler 5, where upon cooling, disposed of their warmth with the formation of superheated steam and saturated water. After the recovery boiler 5 exhaust gases directed into the condenser 7, where they are additionally cooled by water vapor condensation. The resulting condensate is sent to the deaerator 8 and then through the pump 9 in the boiler 5, and dried exhaust gases to enter it into contact with the fuel gas, while it is heated and humidified with water vapor, due to partial evaporation and cooling water. Heated and humidified fuel gas is fed into the combustion chamber 2, where in its primary area is mixed with primary air and burn, and cooled in pessoalmente 10 water is fed into the tank 8, and then through the pump 9 in the boiler 5.

In comparison with the prototype of the proposed method of converting thermal energy into mechanical energy significantly improves the economic, environmental and performance indicators getprotobyname installation, which it implements.

The experiments revealed that, compared with the prototype it has increased the efficiency of 3.5% absolute and capacity by 28%. The content of nitrogen oxides in the exhaust gases does not exceed 35-38 mg/m3exhaust gas, which is 2.5 times lower than the international standards.

In addition to the above, it should also be noted that increasing the power getprotobyname installation 28% about the same reduces the value of its kilowatt of installed capacity.

Claims

1. The method of converting thermal energy into mechanical energy, comprising the processes of compression of air, followed by separation of its primary and secondary, n is Denmark, which is mixed with steam-air mixture with the formation of the vapor-gas mixture, converting its potential energy into mechanical energy, heat recovery from exhaust gas mixture (exhaust gas) in the HRSG with the formation of superheated steam flow in the secondary zone of the combustion chamber and saturated water, further cooling the exhaust gases by condensation of water vapor, feeding the condensate to the boiler and supply of saturated water in teplomassoobmennyh, which after partial evaporation and cooling systems divert from teplomassoobmennyh and mixed with the condensate, characterized in that use as a fuel for fuel gas, which before it enters the combustion chamber is introduced into contact with saturated water, heated and humidified with water vapor formed by the partial evaporation of water, and the secondary air is mixed with superheated steam with the formation of steam-air mixture.

2. Getprotobyname installation comprising an air compressor with a compression chamber containing a primary zone with a supply of fuel gas and secondary zone, and with gas turbine associated with the consumer of mechanical energy, and sequentially arranged in the direction of movement is densetu through the tank and the pump is connected to the input of the boiler, and teplomassoobmennyh that his entrance on the water connected to the drum separator and out of the water to the deaerator, characterized in that use as a fuel for the fuel gas, which lead through a system of regulating the supply of fuel gas to teplomassoobmennyh, the output of which is connected to the primary zone of the combustion chamber.

 

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