RU182819U1 - HEAT RECOVERY INSTALLATION WITH SEALED CLOSED CIRCUIT - Google Patents

Abstract

The utility model relates to the field of energy conservation, in particular to closed cycle heat recovery plants.

Heat recovery unit with a sealed closed circuit, characterized in that the electric generator is cooled by steam of a closed-circuit working fluid exiting the turbine, with a part of the steam bypassed through a perforated partition, and its rotor combined with the turbine rotor is mounted on gas-dynamic supports operating in the environment of this steam .

This solution simplifies the design of the heat recovery plant by ensuring tightness when special high-performance sealing devices between the rotating shaft and the housing are excluded from its structure and allows containerized design, which in climatic regions with low temperatures facilitates the operation of the installation and increases its service life.

Description

The utility model relates to the field of energy conservation, in particular to closed cycle heat recovery plants.

Designs are known, for example, the ORMAT OCR setup: [Electronic document], (http://maenerg.ru/ormat.html). Retrieved 06/04/18, using n-pentane as a working fluid. The main disadvantage of such installations with respect to areas with low atmospheric temperatures is the open location of its components outside the room or container due to the lack of complete tightness of the closed loop of n-pentane, which appears due to the connection of the rotating shaft of the turbogenerator and the stationary housing at the boundary of the closed loop of fire hazardous pentane and atmosphere.

Known designs of heat recovery plants AQYLON: [Electronic document], (http://www.aqylon.com). It was checked on 04.06.18, with a closed circuit, in which the increased tightness of the connection of the shaft and the housing is ensured by the use of special seals. The main disadvantage of such designs is the complexity and high cost of seals, as well as the incomplete elimination of leaks of an expensive working fluid of a closed circuit into the atmosphere or suction of atmospheric air into a closed circuit, which complicates their operation.

These drawbacks can be overcome by using a sealed container with a turbine and an electric generator located in it, cooled by a closed-circuit working fluid, the rotor of which, which is one with the turbine rotor, is installed in the stator on gas-dynamic supports working in the environment of this steam, while supplying and discharging the worker bodies to the container are carried out through fixed joints.

The structural layout of the heat recovery plant with a sealed closed loop is shown in Figure 1. It consists of a sealed container 1 with an electric generator 2 installed in it, and a turbine 3 having a single rotor 4 installed in the stator on gas-dynamic supports 5. The sealed container 1 has internal perforated partition 6, dividing it into two compartments, a high pressure steam pipe 7 and a low pressure steam pipe 8. A high pressure steam pipe 7 is connected by a steam line 9 to a steam ator 10, which in turn is connected to the condensate piping 11, feed pump 12 and to the capacitor 13 and the capacitor 13 is connected to steam pipe 14 with the pipe 10 of low pressure steam.

Installation works as follows. High-pressure steam enters from the steam generator 10 into the turbine 3 through the high-pressure steam pipe 7. After expansion in the turbine 3, the steam enters the first compartment of the container 1, from where one part enters the gas-dynamic supports 5 and to cool the electric generator 2, and the other part through the perforated partition 6 enters the second compartment of the container, from where, mixed with steam heated in the electric generator 2, it is supplied through the low pressure steam pipe 10 to the condenser 13. The condensate of the working fluid is supplied from the condenser 13 spot-supply pump 12 via conduits 11 to the steam generator 10 for evaporation.

Such a solution, due to the absence of moving joints at the interface between the two media, eliminates the inevitability of leakage of the working fluid from a closed circuit into the atmosphere or suction of air from the atmosphere without the use of special high-performance seals for these purposes, while the containerized version of the installation facilitates operation and increases its service life under cold climate.

Claims (1)

Heat recovery unit with a sealed closed circuit, consisting of a sealed container, a steam generator, a condensate feed pump and a condenser connected by pipelines, with a perforated baffle located in the sealed container, an electric generator and a turbine with a single rotor installed in the stator on gas-dynamic supports, characterized in that the sealed container has a high pressure steam pipe for supplying from the steam generator for expansion into the turbine and a low pressure steam pipe To discharge steam to the condenser of the sealed container, after cooling the generator and passing through the gas-dynamic support, in its working environment, with the bypass portion of the steam through the perforated partition, the low pressure steam pipe forms a fixed connection with the steam pipe.

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