RU1809279C - Contact heat exchanger - Google Patents

Abstract

Usage: heat power engineering, heat recovery of flue gases from heat engineering equipment. SUMMARY OF THE INVENTION: The off-gas is supplied to the chamber 1 by two flows through the lower and upper tangential nozzles 2 and 3. In the chamber 1, the gases heat the water supplied through the water distributor 10. Next, the gases are removed to a separator 13, made in the form of a surface heat exchanger, at the inlet of the exhaust gas connected to the pipe 4. Separated moisture from the moisture collector 14 is supplied through the pipe 18 to the gas supply pipe 3 for pre-irrigation of the latter. 1 ill.

Description

The invention relates to contact heat exchangers, in particular to centrifugal heat exchangers, and is intended for use in industry for the recovery of flue gas heat from heat engineering equipment, and is an improvement on the known heat exchanger.

. A further object of the invention is to increase profitability by increasing the degree of heat recovery and preventing dripping.

The drawing shows a heat exchanger, cross section. The heat exchanger comprises a working chamber 1, tangential nozzles 2 and 3 for supplying a gaseous medium. In this case, the pipe 2 is located in the lower part of the working chamber 1, and the pipe 3 is in the upper part, the pipe 4 serves to discharge the gaseous medium.

Hollow cylinders 5 and b coaxially located along the axis of the chamber form guide channels 7 and 8, while the outer cylinder 5 is connected to the lower nozzle 2 for supplying a gaseous medium, and the hollow outlet cylinder 9 is connected to the outlet nozzle 4. The moisture distributor 10 is located along the axis of the working chamber 1 and has sections 11 perforated from the holes or nozzle 12 located between the tangential nozzles 2 and 3 for supplying a gaseous medium.

The moisture separator 13 connected to the water collector 14 of the surface heat exchanger serves to reduce the entrainment of droplet moisture and the temperature of the gaseous medium being discharged and contains inlet pipes for the supply of heated water 15 and the gaseous medium 16 and inlet pipes for the removal of heated water 17, the separated water 18 and the gaseous medium 19. In this case, the inlet pipe of the gaseous medium 16 is connected to the output pipe of the contact heat exchanger 4. the output

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a nozzle for removing the separated moisture 18 is connected to the upper tangential nozzle 3 for supplying a gaseous medium.

The heat exchanger operates as follows.

The gaseous mixture is fed simultaneously towards each other through the upper 3 and lower 2 tangential nozzles, due to which it acquires a screw-like motion.

Further, the gaseous mixture flows move along closed paths directed towards each other and are irrigated with liquid from the perforated holes 11 or nozzle 12, where they give their heat to the heated liquid. Under the action of centrifugal forces, liquid droplets move along complex paths and precipitate on the walls of the working chamber 1, after which they flow into the lower part of the apparatus. In this case, the dimensions of the upper flow are limited by the diameter of the working chamber 1 and the discharge cylinder 8, and the dimensions of the lower flow are limited by the guide channel 7 formed by two hollow cylinders 5 and 6 coaxially located along the chamber axis. In the lower part of the working chamber 1, the upper flow is sucked in the direction the channel 8 due to the discharge created by the lower flow of the gaseous medium and is connected with it.

The outgoing gas mixture, containing a small amount of dropping liquid, enters the separator 13. In this case, droplet moisture is deposited on the surface of the heat exchanger and enters the water collector 14, from where it is supplied to the upper inlet pipe 3 for preliminary irrigation of the supplied gaseous

Wednesday. The gaseous mixture in the separator 13 is further cooled and heats the liquid supplied to the moisture distributor 10, thereby increasing the initial temperature of the liquid supplied for irrigation.

Thus, the use of an additional separator connected to the water collector of the surface heat exchanger allows the most complete utilization of the heat of the flue gases of the heat engineering equipment by reducing drip moisture and preheating the irrigating liquid.

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Claims (1)

SUMMARY OF THE INVENTION A contact heat exchanger comprising a vertical chamber with tangential nozzles for supplying a heating medium, connected to the lower and upper parts of the chamber, and connected to the last nozzle of the outlet of the heating medium, and two coaxial outer and inner shells are installed in the lower part of the chamber, the first of which is connected to the lower nozzle, as well as a water distributor with a spray device, characterized in that, in order to increase efficiency by increasing the degree of heat recovery and prevention of drip entrainment, it additionally contains a separator and a moisture collector, interconnected, the first of which is made in the form of a surface heat exchanger, the gas inlet and water outlet of which are connected respectively to the branch pipe of the heating medium outlet and the water distributor, and the moisture collector is additionally connected to the branch pipe for supplying the heating medium connected to the upper part of the chamber. l-V / V J Editor Compiled by M. Tyurin Tehred M. Morgenthal Order 1278 Circulation VNIIIPI of the State Committee for Inventions and Discover at the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Rauska nab, 4/5 Proofreader N.Keshel Subscription