SU1241039A1 - Device for producing heat and solid carbon dioxide - Google Patents

Description

The invention relates to refrigeration technology, and more specifically to integrated power plants for producing heat, cold and solid carbon dioxide.

The aim of the invention is to increase the efficiency of the installation.

The drawing shows the scheme of the proposed installation.

The installation contains a gas circuit 1, a blower 2, an intermediate heat exchanger 3, a compressor 4, a combustion chamber 5, a turbine 6, an economizer 7, a dehumidifier 8, a regenerator 9 with forward 10 and reverse 11 flows, FL 12, detander 13, freezers 4 and 15 with pipe 16 and 17 space and annular 18 and 19 space, the separator 20 of solid carbon dioxide and control valves 21-30.

The installation works as follows.

Outside air is supplied by a blower 2 through an intermediate heat exchanger 3 to a compressor 4, in which .0.0 pressure is compressed corresponding to the pressure in combustion chamber 5, into which also liquid or gaseous fuel is supplied. The resulting gases with high temperature and pressure enter the gas turbine 6, in which they adiabatically expand with the production of mechanical work expended on compressing air in compressor 4. Further cooling of the gases takes place in economizer 7, in which the water directed by the consumers is heated. In the moisture separator 8, the gases are freed from droplet moisture and sent to the regenerator 9 through the forward flow line 10, while they are further cooled by the reverse flow 11. With the control valves 22, 24, 25 closed, 28, 30 and open 21, 23, 26, 27, 29 gases at a temperature of about 143 K and a pressure of 0.2 MPa through the control valve 21 enter the tube space 16 of the heat exchanger-freezer 14, on the surface of which freezing of carbon dioxide occurs, This gas flow rate of about 5 m / s. In order to achieve a sufficient degree of freezing of carbon dioxide on the surface, the velocity of the gases should be as low as possible; moreover, the gas flow rate should not exceed the critical speed at which disruption of frozen carbon dioxide from the surface of the heat exchanger may occur;)).

When freezing carbon dioxide in tube space i6, a layer-crystalline product is formed, which has some thermal resistance, VOSOSGVIS.,:, L. - SMDCH) B

Re.haktor K. Viloshchuk 1Ч р (. Л Л- i; - :::.; Corregorgor O.. IvroiMfl

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increases with increasing layer thickness, which leads to a decrease in the degree of freezing of carbon dioxide and to an increase in the hydraulic resistance of the pipe part of the heat exchanger-freeze body. The control of the freezing of carbon dioxide is carried out using, for example, two gas analyzers (not shown) recording the concentration of carbon dioxide in the combustion products in the forward flow line 10 from the regenerator 9 and the gas main connecting the filter 12 and the expander 13.

Through the regulating valve 23 and the filter 11, in which the entrained carbon dioxide is captured, the gases enter the expander 13, reducing its pressure to 0.1 MPa and temperature to 120 K and increasing the specific volume. The strongly cooled gases flow through the control valve 27 into the annular space 18 of the freezing vessel 14, cooling it and ensuring the crystallization of carbon dioxide in the tube space 16 of the freezer 14. Then the gases, heated to a temperature of about 133 K due to ingestion of the heat of crystallization, carbon dioxide, through regulating

5, the valve 29 enters the tube space 17 of the freezer 15, where the previously frozen carbon dioxide breaks down, while the gas flow velocity is about 9.38 m / s, which is greater than the gas flow velocity in the tube space 16 of the freezer 14. Frozen carbon dioxide breakdown from the surface, the heat exchanger and a scavenger are caused by an increase in the gas velocity above the critical level due to a decrease in pressure and an increase in the specific volume of gases during their pactnuperation in the expander.

Next, the gases, together with frozen carbon dioxide from the freezer 15, through the regulator Veltil 26 enter the separator 20, where the separation

carbon dioxide from i; the flow of the stream. Reheating STREAM heating; –1 occurs in the regenerator 9, from where gases are emitted and the environment.

When opening control valves 22, 24, 25, 28, 30 and closing, I regulate 5; their valves 2. 23, 2.5, 27, 29, which prevents the switching of heat exchangers-extractors 14 and 15, the process of freezing of carbon dioxide begins in the tube space there are 17 5 freezers S, and from the tube space 16 are freezers G; There is a removal of you: -x of your ilkarct with a subsequent separation of e l o, from ha:; p 5}; the separator 20.

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Claims (1)

PLANT FOR PRODUCING HEAT AND CARBON DIOXIDE, containing a gas circuit and a supercharger, an intermediate heat exchanger, a compressor, a combustion chamber, a turbine located on one shaft with a compressor, an economizer, a moisture separator, a regenerator with forward and reverse flow lines, a filter , an expander placed on one shaft with a supercharger, and two periodically switching freezers with tube and annular spaces for each of them, characterized in that, in order to increase efficiency, it It additionally contains a solid carbon dioxide separator, moreover, the pipe space of one freezer and a filter are sequentially included in the direct flow line between the regenerator and the expander, and the annular space of the same freezer, the pipe space of the other freezer and the separator are included in the return flow line between the expander and the regenerator. SU ,,,, 1241039