Steam turbine

 

(57) Abstract:

The invention relates to the field of energy and the industries that use steam turbine. Steam turbine consists of a turbine generator regenerative heating systems of water, including low pressure heater, a deaerator, a high pressure heater, boiler, heater and air condensation plant with a rotational drive, connected by tubes to the heater, and possible side consumer of heat (greenhouse, fish farm, heating system and others). Air condensation plant comprises two working wheels centrifugal blowers mounted on a common hollow shaft to form between neobrabotannye sides of the annular cavity in the shaft holes, informing the cavity of the shaft with the annular cavity, the hollow shaft communicates with the outlet of the turbine, the annular cavity is in communication with the system regenerative heat the water and the de-aeration nozzles of the impeller of the centrifugal blower is communicated with the inlet of the heater of the boiler and other heat consumers. In addition, on the walls of the annular cavity is made of Colm reducing thermal pollution of natural water bodies, to reduce the cost of installation through the use of air-condensing installation of a new type. 1 C.p. f-crystals, 2 Il.

The invention relates to the field of energy and the industries that use steam turbine.

Known thermal power plant containing a steam generator provided in an air blowing fan, the suction nozzle of which the duct is connected to the inlet, and a steam turbine with the mixing condenser connected to a dry cooling tower, and the suction nozzle of the blower fan is in communication with the space dry cooling tower is an air duct for supply to the steam generator during the cold period of time part of the heated air (USSR Author's certificate N 1158769, MKI F 1 K 13/00).

The disadvantages of this device are cumbersome design of the air-condensing installation and high cost.

The closest in technical essence to the offer (the prototype) is a steam turbine installation comprising a steam turbine with an electric generator, a system of regenerative heating water, boiler air heater and air-condensing installation type G is tion CHP. Electric station. 1984, N 10).

The disadvantages of this device are the low efficiency of the entire installation, the bulky design of the air-condensing installation, high cost.

The invention is aimed at improving efficiency through waste heat recovery air, thereby reducing thermal pollution of natural water bodies, reducing installation costs through the use of air-condensing installation of a new type, recycling of heat.

To solve this problem in the steam turbine installation comprising a steam turbine with an electric generator, a system of regenerative heating water, boiler air heater and air-condensing installation, air-condensing installation includes two working wheels centrifugal blowers mounted on a common hollow shaft to form between neobrabotannye sides of the annular cavity in the shaft holes, informing the cavity of the shaft with the annular cavity, the hollow shaft communicates with the outlet of the turbine, the annular cavity is in communication with the system regenerative heat the water and the de-aeration nozzles impellers centrifugal vozduhoduvov is moreover the de-aeration nozzles of the impeller of the centrifugal blower is communicated with the input of a heater of the boiler, and other heat consumers.

In Fig. 1 shows a diagram of a steam turbine; Fig.2 - diagram of the air-condensing installation.

Steam turbine comprises a turbine 1 generator 2, the system of regenerative heating water, comprising a low pressure heater 3, tank 4, the high pressure heater 5, boiler 6 heater 7 and the air-condensing installation 8 with the rotation drive 9, connected by a pipe 10 with a heater 7, and the side of the consumer heat 11 (greenhouses, fish farming, heating system and others ).

Air-condensing installation 8 contains two working wheels 12 and 13 centrifugal blowers mounted on a common hollow shaft 14 to form between neobrabotannye sides of the annular cavity 15 in the shaft holes 16, informing the cavity of the shaft with the annular cavity, the hollow shaft communicates with the outlet of the turbine 1, the annular cavity is in communication with the system regenerative heat the water and the de-aeration nozzles wheels 17 of the centrifugal blower is communicated with the inlet of the heater 7 of the boiler 6.

Also on the walls of the annular cavity 15 is annular important blowers air-condensing units have inlet guide vanes 21, the impellers 12 and 13 with the blades 22, a housing 23 and 24 snails. The hollow shaft is fixed in the supports 25. To reduce contamination between air and steam cavity air-condensing installation housing 23 are used seal 26.

Steam turbine equipped with a Sipper pump 27 and a nutrient pump 28.

The device operates as follows. After the turbine 1 steam exhaust enters the air-condensing installation 8, in which due to the cooling air is provided by condensation of the steam. The rotation drive 9 via a coupling 19 causes the rotation of the shaft 20 and is rigidly associated with the disks 12 and 13 of the capacitor and the hollow shaft 14. Steam through the hollow shaft 14 and openings 16 therein is supplied into the cavity 15 between the rotating disks 12 and 13. Under the action of centrifugal force and friction of the vapor moves to the periphery of the disks and still expanding due to the increase in flow area between the discs with increasing radius, which leads to cooling and condensation of steam. Condensation of the steam is the most intensive on the inner pablopicasso the surface of the disc 12 and 13 due to heat exchange a pair of disks, cooled with the outside air coming through the input device 21 on the blades 22 of the disks 12 and Tishkov under the influence of centrifugal forces and is dropped into the cavity of the housing 23, how pumped for reuse. The rotation of the disks increases the efficiency of heat transfer during condensation of steam on the disc surface due to displacement of the film of condensate from the surface of the rotating disk under the influence of centrifugal forces. The rotation of the disks 12 and 13 increases the heat transfer in 3-5 times in comparison with the heat transfer at the stationary surface (Shchukin C. K. the Problem of mass forces in hydrodynamics and theory of convective heat transfer. Merv.sat.: Heat and mass transfer in aircraft engines. Kazan, KAI, 1982, S. 16). For further intensification of heat exchange between the vapor and the disks 12 and 13 on the disc surface can form annular projections 18, which discards the condensate from the disc surface. The air, heated by steam in the heat exchange through the walls of the disks 12 and 13 in the impeller of the air blower, arrives in the snail 24 and then through the de-aeration nozzles 17 is sent to the heater of the boiler for heat recovery steam condensation. In addition, part of the heated air is directed to the utilization side heat consumers, such as greenhouse heating, fish farming, etc. Coming into the impeller of the air at the same time Sneem and operation of the seal 26 from the latest available air suction. The condensate from the air-condensing installation 8 is pumped by pump 27 through the system regenerative heat the water, and then nutrient water pump 28 is fed into the boiler 6, the steam from which is supplied to the turbine 1, resulting in a rotation of the electric generator 2.

Thus, the use of the proposed steam turbine achieves the following technical results:

use the diagram of steam turbine described air-condensing installation is exempt from building exhaust tower or significantly reduces its cost and size,

the described scheme steam turbine applicable for both primary and to drive turbines,

in contrast to the known schemes indirect air heating with water condensers for the first time for preheating is used thermodynamically favorable, low-grade steam turbine instead of the selected heat or exhaust steam, condensate, cooling and network of water, heat of combustion products from the boiler (Kroll L. B. and other Convective elements powerful boiler apparatus. M: Energy, 1976, S. 127-183),

improving the efficiency of a steam turbine through a heat recovery waste air is used in shallow areas,

heat recovery steam condensation in the consumers of heated air, such as greenhouses, buildings, power plants, etc.

1. Steam turbine installation comprising a steam turbine with an electric generator, a system of regenerative heating water, boiler air heater and air-condensing installation, characterized in that the air condensation plant comprises two working wheels centrifugal blowers mounted on a common hollow shaft to form between neobrabotannye sides of the annular cavity in the shaft holes, connecting the cavity of the shaft with the annular cavity, the hollow shaft communicates with the outlet of the turbine, the annular cavity is in communication with the system regenerative heat the water and the de-aeration nozzles of the impeller of the centrifugal blower is communicated with the inlet of the heater of the boiler and other heat consumers.

2. Installation under item 1, characterized in that the walls of the annular cavity is made circular protrusions.

 

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FIELD: machine building.

SUBSTANCE: proposed machine is designed to be used as a compressor or pump. The machine consists of two coaxial pumps linked up by stepwise shaft and piston with enclosed helical groove. Aforesaid piston forms low-pressure chambers in cylinders and is linked with driving disk by draw-bars that interact with the piston groove. Stepwise chamber is arranged inside the piston to make two high-pressure working chambers. There are channels made in the housing, shaft and piston communicating with working chambers to accommodate intake and discharge valves. Proposed invention allows producing compact, two-stage, four-cylinder machine with two-way pistons that generates high-pressure working body that features minimum pulsation and reduced power input.

EFFECT: production of high-pressure machine.

3 cl, 2 dwg

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