RU2251642C2 - Method of extracting water from ambient air - Google Patents

Abstract

FIELD: gas-turbine plants.

SUBSTANCE: method comprises overexpanding air in a gas-expansion turbine and compressing it in a compressor. Downstream of the turbine the ambient air is cooled by cool air, and moisture is withdrawn. The compressor is actuated from the turbine. The cooling of the ambient air by cool air downstream of the turbine is performed before its supplying to the letter. The moisture is additionally withdrawn from the overexpanded air, and additional compression of the overexpanded air downstream of the compressor up to the pressure of the ambient air is performed in an individual plant.

EFFECT: enhanced efficiency.

2 dwg

Description

The invention relates to the field of gas turbine construction and can be used to create industrial installations and transport installations in order to obtain water from the air basin.

Various methods are known for producing water from an air basin. See, for example, "A method of producing condensate from the external environment and a device for its implementation." (Patent No. 2136929 dated 09.10.99 (F 24 F 3/14, 02 C 6/00, priority June 10, 1997, author Perelstein B.Kh.). The device includes a vacuum unit that consists of an over-expansion turbine and a booster compressor and the air separator installed between them. discharges part of the moisture and drained it is compressed in a compressor and fed into the external environment with a temperature of about 45 ° C .

Using a similar method to obtain water from the environment is not economical enough.

The closest technical solution for obtaining water from an air basin is the method and device described in patent No. 2113610 dated 06/20/98, F 24 F 3/14, F 02 C 6/00, priority April 19, 1995. "Method for producing condensate and device for its production ", author B.Kh. Perelshtein. In this installation, the initial cooling of the air reaches values of minus 50-70 ° C and below. Moisture is not removed in the primary circuit. In each of the streams (starting from the second), moisture is obtained and used (dried stream) as a refrigerant for the subsequent stream.

A serious disadvantage of this method is that most of the parallel drained streams operate at temperatures below zero Celsius. The fight against icing in this case causes a serious complication of the process of obtaining moisture. The refrigeration resource obtained in this way is not fully used, i.e. inefficient.

The object of the invention is to increase the efficiency of obtaining water from the air basin.

A method of producing water from an air pool, including processes of re-expansion of air on an expander turbine and compression in a booster compressor, cooling of outside air with cold air after a re-expansion and moisture removal turbine, driving a booster compressor from a re-expansion turbine, characterized in that the outside air is cooled by cold air after the turbine overexpansion is carried out before it enters the last, additionally carry out the removal of moisture from the overexpanded air and squeeze the overexpansion Foot air after the booster compressor to the external fluid pressure is carried out in a separate unit.

Embodiments of the method are shown in figure 1 and figure 2.

Figure 1 shows the unit for receiving water from an air basin, coupled with a gas turbine installation. Directly, the unit for receiving water consists of an input device - 1, a heat exchanger - 2, a moisture separator 3, an expansion turbine - 4, a separator - 5, a moisture separator - 6, a moisture separator - 7, communications - 8, a booster compressor - 9, communications - 10, a gas turbine engine (compressor) - 11, exhaust - 12. Figure 2 shows the unit for receiving water from an air basin, where the method is carried out using an internal combustion engine (ICE). Here, the water production unit is 13, ICE is 14, the control valve is 13, the stem is 16, the outdoor air communication is 17.

System operation.

Outside air (Fig. 1), for example, with parameters (P _nar = ~ 0.1013 MPa; T _nar = ~ 25 ° C - 35 ° C) is supplied to the input device - 1, cooled in the heat exchanger - 2 and discharges moisture, which is discharged through the device - 3 and enters the over-expansion turbine - 4. Cold air with parameters of the order of ~ 0.05 MPa and a temperature of the order of 1-3 ° C is fed to the separator - 5, the precipitated moisture is discharged into the device - 6. Next, the air enters heat exchanger - 2. The precipitated residual moisture is discharged through the device - 7. Dry air is supplied to the booster compressor - 9 and with pressure iem order ~ 0.085 MPa Communications - 10 is supplied to the gas turbine engine - 11, e.g., a bypass (or, in particular, to a conventional turbocharger) where the last stage of the second compression to atmospheric pressure. By communication - 12 the working fluid is drawn out.

In the embodiment of the method of figure 2, if it is necessary to obtain water (armored personnel carrier, tank), the air flow in the internal combustion engine is sucked through the water receiving device - 13. A valve - 15 is installed between the device - 13 and the internal combustion engine - 14. it is sucked through the device - 13 and moisture is produced. If there is no water demand, the valve - 16 is raised and the outside air through the inlet - 17 is supplied directly to the engine. In the process of obtaining water, the pressure at the inlet to the internal combustion engine is about 0.085 MPa.

In general, the compression of air to the ambient pressure after a booster compressor from pressures P = 0.075-0.08 MPa can be performed as a separate compressor stage driven by an electric motor or any internal combustion engine.

For a feasibility study, we indicate that in comparable conditions the energy consumption per liter of water in the prototype is 0.8 kW. In the installation according to this invention: 0.6-0.7 kW per liter. The considered method of operation on an autonomous reversible gas generator does not require coordination with the drive speed. It also reduces the cost of construction. This makes it possible to use a ready-made drive (gas turbine engine, compressor driven by internal combustion engine, or internal combustion engine with suction) with this method of operation without significant alterations.

Claims (1)

A method of producing water from an air pool, including processes of re-expansion of air on an expander turbine and compression in a booster compressor, cooling of outside air with cold air after a re-expansion and moisture removal turbine, driving a booster compressor from a re-expansion turbine, characterized in that the outside air is cooled by cold air after the turbine overexpansion is carried out before it enters the last, additionally carry out the removal of moisture from the overexpanded air and squeeze the overexpansion Foot air after the booster compressor to the external fluid pressure is carried out in a separate unit.

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