Method of extracting water from ambient air

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 Downstream of the turbine the ambient air is cooled by cool air, and moisture is withdrawn.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 The moisture is additionally withdrawn from the overexpanded air, and additional compression of the overexpanded air downstream of the compressor up to the pressure of the ambient air is performed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

 

The invention relates to the field of gas and can be used to create industrial installations and transport systems with the aim of obtaining water from the air.

There are various ways of obtaining water from air. See, for example, "a Method for receiving condensate from the external environment and device for its implementation". (Patent No. 2136929 from g. (F 24 F 3/14, 02 C 6/00, priority 10 June 1997, the author of Perelstein KAPYSHEV). The device includes vakuumiruemye unit, which consists of a turbine pererasseyaniya and booster compressor and installed between the air dryer. Outside air peerassist turbine from external pressure and temperature (e.g., 20-25°and the pressure of 0.013 MPa) to a temperature of 0°-3°and a pressure of about 0.06 MPa, passing the dew point of the air drops, the moisture and drained it is compressed in the compressor and serves in an external environment with a temperature of about 45°C.

Use this method to obtain water from the external environment is not sufficient economically.

The closest technical solution to obtain water from the air basin is a method and device described in the patent No. 2113610 from g., F 24 F 3/14, F 02 C 6/00, the priority of the April 19, 1995, "Method of producing condensate and device for its manufacture, the author Bagirela. In this installation the touch cooling down air reaches minus 50-70° C and below. In the first circuit humidity is not removed. In each of the streams (starting with the second) get moisture and use it (dried stream) as the refrigerant for subsequent stream.

A serious disadvantage of this method is that a large part of the parallel abusively streams operating at a temperature below zero Celsius. The fight against icing in this case is a serious complication of the process of obtaining moisture. Obtained in this way Hadarezer is not fully used, i.e. inefficient.

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

The method of obtaining water from air basin, which includes the processes pererasseyaniya air between the expansion turbine and compression booster compressor, cooling outside air cold air after turbine pererasseyaniya and moisture, drive booster compressor from the turbine pererasseyaniya, characterized in that the cooling of the outside air cold air after turbine pererasseyaniya carried out before his arrival in the past, additionally carry moisture from pereraschitana air and expanded pereraschitana air after the booster compressor to a pressure of the external environment is carried out in a separate unit.

Options implemented the recommended reading method shown in figure 1 and figure 2.

Figure 1 shows a unit for obtaining water from air basin, coupled with a gas-turbine installation. Directly to the unit for water consists of an input device 1, the heat exchanger 2, the separator 3, turbine pererasseyaniya - 4, a separator 5, the air dryer - 6, a separator 7, and communications - 8, booster compressor 9, the communication - 10, gas turbine engine (compressor) - 11, the exhaust 12. Figure 2 shows the Assembly for receiving water from the air basin, where the method is carried out using internal combustion engine (ice). Here the unit is getting water - 13, DIC 14, the control valve 13 and the rod 16, a communication external air - 17.

The operation of the system.

Outside air (figure 1), for example, with parameters (Rdrug= ~0,1013 MPa; Tdrug= ~ 25° - 35° (C) is applied to the input device 1, is cooled in heat exchanger 2 and resets the moisture which is discharged through the device 3 and is supplied to the turbine pererasseyaniya - 4. The cold air with the parameters of the order of ~ 0.05 MPa and a temperature of about 1-3°served on the separator 5, lost moisture is given in the device 6. Next, the air enters the heat exchanger 2. Fallen residual moisture is discharged through the device 7. Dry air is supplied to the booster compressor 9 and a pressure of the order of ~ 0.085 MPa communication - modesa for gas turbine engine 11, for example, two (or, in particular, on a normal turbocharger), where the second last stage of compression to atmospheric pressure. Communication - 12 working fluid is drained out.

In the embodiment of the method according to figure 2, if necessary, obtain water (armored personnel carrier, a tank), the air flow in internal combustion engines promazyvaetsya through the device receiving water 13. Between the device 13 and DIC - 14 is set to the valve 15. If omitted rod 16 air promazyvaetsya through the device 13 and is moisture. If water is absent, the valve 16 is raised and the outer air through the entrance 17 is fed to the internal combustion engine directly. In the process of obtaining water inlet pressure in internal combustion engines about 0.085 MPa.

In General, the expanded air to ambient pressure after the booster compressor from pressure P=0,075-0.08 MPa can be produced separate compressor stage, driven by an electric motor or any internal combustion engine.

For the techno-economic assessment indicate that under comparable conditions the energy consumption of one liter of water in the prototype 0.8 kW. In the installation according to this invention: 0,6-0,7 kW per liter. The way to work on a standalone reversible gas generator does not require matching speed with the drive. It also reduces the cost of construction. Created to vozmozhnostuvelichivat with this method of work is already ready drive (CCD, the compressor is driven internal combustion engine, or internal combustion engine with protocom) without significant changes.

The method of obtaining water from air basin, which includes the processes pererasseyaniya air between the expansion turbine and compression booster compressor, cooling outside air cold air after turbine pererasseyaniya and moisture, drive booster compressor from the turbine pererasseyaniya, characterized in that the cooling of the outside air cold air after turbine pererasseyaniya carried out before his arrival in the past, additionally carry moisture from pereraschitana air and expanded pereraschitana air after the booster compressor to a pressure of the external environment is carried out in a separate unit.



 

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