The combined use of liquefied natural gas in boilers
(57) Abstract:The invention relates to the field of power engineering and is intended for combined heat and electric energy, as well as cold. Liquefied natural gas insulated from the tank 1 by a pump 3 through line fuel 2 is supplied to the regulating valve 4, where in the refrigerating chamber 5, which cools the coolant in the air conditioning system, the vaporized and heated with increasing pressure. Then heated to a high temperature in the heater 6 and flows into the turbine 7, where the expansion of the gas allows you to have more electricity in the generator 8. Flue gases from the boiler 10 through line 11 passes through the heater 6. The purpose of cooling and air conditioning in the boiler room provides air-conditioning system with Autonomous air conditioning 12 and a closed coolant circuit 13 to heat exchanger 14, which is located in the chamber 5. The invention improves the efficiency of the entire system, as well as the possibility of receiving additional electric energy and air conditioning inside the boiler plants. 1 Il. The invention relates to the field ptx2">Known non-contained air conditioners, which does not include in its composition a source of cold (Y. Zakharov Century Shipboard installation of air conditioning and refrigeration machine. L.: Ed. "Shipbuilding", 1979, page 172). It is advisable in them, instead of refrigerating machines, use cold liquefied gases at regasification.Known gas station with power plant comprising a gas pipeline and an outline of the power plant, consisting of a regenerator, heater, expansion turbine (Patent RF N 2009389, bull. N 5 from 15.03.94). However, for operation of the necessary high temperature source of heat, such as exhaust gases.A known system of the combined use of liquefied gas in the cooling equipment of the vehicle, designed for simultaneous drive of the vehicle and receiving a cold that includes a container of liquefied gas Converter direct cycle (internal combustion engine) and the supply line fuel shutoff and solenoid valves, driers, throttle device, an evaporator (refrigerator) and receiver (RF Patent N 2053434, bull. N 3 from 27.01.96, F at low subzero temperatures, leads to lower efficiency of internal combustion engines, moreover, multiple throttling is not possible to use the energy of the phase transition for more useful energy.A known system for the preparation and use of liquefied gas, comprising a thermally insulated vessel with liquefied gas and the supply line of the fuel control valves, throttling devices, unit coolers with different levels of cooling and burner (RF Patent N 2053435, bull. N 3 from 27.01.96). However, this system is not designed to generate electricity.The technical result, which can be obtained by carrying out the invention is to improve the efficiency of the entire system, as well as the possibility of additional electric power and air conditioning inside boiler plants.To achieve this, the technical result of the combined system using liquefied natural gas boiler installations, including insulated container of liquefied natural gas, the supply line fuel valve and a refrigerator equipped with in-line fuel cryogenic submerged pump, refrigeration kamagra boiler to the main flue gases, passing through the heater, and air conditioning system consisting of Autonomous air conditioning and closed circuit coolant passing through the air conditioning heat exchanger in the refrigerating chamber and the pump, the capacity of the completed insulated.The introduction of the combined system using liquefied natural gas in boilers supply line fuel with a freezer, heater and turbine with generator and boiler highway flue gas passing through the heater, and air conditioning systems with Autonomous air conditioning and circuit of the coolant passing through the cooling chamber, allows to obtain a new property, consisting in the use of low-temperature fuel for cooling the coolant / air-conditioning system, and after heat exchange with the combustion gases as the working fluid to the expansion turbine with additional electricity in the generator.The drawing shows the combined use of liquefied natural gas in boilers.The combined system consists of a tank with the liquefied nagriamel 6, the expansion turbine 7, the generator 8, located on the same shaft with the turbine 7, and the surge tank 9, the boiler 10 to the main flue gas 11 flowing through the heater 6, and air conditioning systems, including non-contained air conditioner 12, and the path of the coolant from the heat exchanger 14 in the refrigerating chamber 5 and the pump 15.The combined use of liquefied natural gas in boilers is as follows.Liquefied natural gas from the tank 1 by a pump 3 flows into the supply line of the fuel 2, passes through the control valve 4 and enters into the cooling chamber 5, which cools the coolant in the air conditioning system, the evaporated with increasing pressure and temperature. From the cooling chamber 5, the gas is supplied to the heater 6, where it is heated to high temperature with increasing pressure due to heat exchange with flue gases generated in the boiler 10. After the heater 6, the gas flows into the turbine 7, which, extending, doing more useful work that can be converted into electrical energy in the generator 8, located on the same shaft with the turbine 7. Then comes in rasshiritel is camping in the environment. The purpose of cooling and air conditioning inside the boiler room provides air-conditioning system with Autonomous air-conditioned 12, in which, with the help of the pump 15, is supplied with the coolant in the circuit 13 having the heat exchanger 14 in the refrigerating chamber 5, where the cooling of the coolant.Sources of information
1. Y. Zakharov Century Shipboard installation of air conditioning and refrigeration machine. L.: Ed. "Shipbuilding", 1979, page 172.2. RF patent N 2009389. Bull. N 5 from 15.03.94. F 17 D 1/02.3. RF patent N 2053434, bull. N 3 from 27.01.96, F 17 D 1/02.4. RF patent N 2053435, bull. N 3 from 27.01.96, F 17 D 1/04 - the prototype. The combined use of liquefied natural gas in boilers, comprising a container of liquefied gas and the supply line of the fuel valve, characterized in that the system is equipped with cryogenic submerged pump in line fuel supply, freezer, heater, expansion turbine with a generator on the same shaft, expansion tank, air conditioning and boiler highway flue gases which pass through the heater and removed in the environment and climate reluctant coolant, passing through the non-Autonomous air conditioning, pump and heat exchanger in the refrigerating chamber, and the container is made of insulated and gas from the turbine is fed into the expansion capacity of the expansion vessel in the boiler furnace.
FIELD: thermal engineering; thermal power stations.
SUBSTANCE: proposed operating process of thermal power station is as follows. Boiler-generated steam is conveyed to turbine wherefrom it is supplied to condenser for condensing it; full-flow condensate is delivered by means of condensate pump to low-pressure regenerative heaters and then to high-pressure deaerator; makeup water is deaerated in atmospheric-pressure deaerator and conveyed to full-flow condensate path, vented steam being discharged from atmospheric-pressure deaerator into atmosphere. Flowrate of vented steam discharged from atmospheric-pressure deaerator is regulated with respect to desired content of oxygen dissolved in mixed flow of makeup water and full-flow condensate beyond vacuum system of turbine unit, for instance downstream of low-pressure heater second along full-flow-condensate path.
EFFECT: enhanced economic efficiency and operating reliability of thermal power station.
1 cl, 1 dwg