SU769192A1 - Water steam feed water heater - Google Patents

Description

/ 54 / STEAM WATER HEATER

j The invention relates to surface water heaters installed in steam turbine systems and intended for heating water flowing into the pipe 4 by steam entering the annular space.

Steam-water water heaters are known, comprising a housing, a water chamber, a pipe system connected to a water chamber, guide rail partitions and a non-condensable gas supply pipe.

In these heaters, there is no possibility of special concentration of air and its assorted pressure in the vapor-air mixture before its removal from the apparatus. The accumulation of air in the pipe system dramatically, impairs heat transfer in this area and leads to an increased value of | Nb-, 2 () feed water per step: apparatus .-.

Other water heaters are also known, comprising a housing with a pipe for supplying steam / heating medium /, water |. 26

the chamber and the tube bundle inside the housing i, connected to the chamber, the transverse guide partitions and

collector for removal of non-condensable gases 2, 3j.

The air-steam mixture before it enters the manifold for non-collection. condensing gases pass through

: the annular space of the tubes for heating the first run of water allocated for the surface air cooler, which allows, due to the efficiency, of the steam on it to increase the concentration of air in the temperature from the water heater. steam-air mixture. In these heaters installation

surface air cooler compresses and increases the cost of construction, since it requires the additional allocation of an expensive heating surface, and a high concentration of air in

fc- ;: The vapor-air mixture drastically reduces T: & The overall efficiency of this surface and contributes to an increase in the intensity of corrosion of tubes in this month. 3 76 those that reduces the reliability of the air unit. 1 The purpose of the invention is both yochnyo .. contact mass transfer in the cross-movement of steam and water, as well as improving the efficiency and efficiency of removal of non-condensing gases from the water heater. This is achieved in that for contact vapor exchange during the cross movement of steam, partitions outside the beam, at the entrance of the heating medium are profiled and have perforation, and the collector is installed behind the first cities. "," Condensation on the partition moves in the direction of the profiled one and perforates its part and at the expense of; contact when washing the tubes of the heating surface is supercooled. Supercooled condensate flows through a perforation in a cascade of jets onto a fender. - The drawing shows a steam-water water heater, cross section. The water heater has a WATER I chamber, body 2, a piping system .3 with installed partitions 4. A side 5 is installed above the partitions, and the partition 16 section 16 of the partition is located at the end of the double steam path. Above the profile section, baffle plates 7 are installed, and along it, along the course of the steam flow, a manifold of air outlet is located. During operation of the water heater, the flow of heated water through the corresponding branch pipe enters the water chamber 1, further into the pipe system 3 and out through the branch pipe, also located on the WATER chamber. In the pipe piping system, the heating surfaces of the first water run, having a minimal temperature and temperature, are located directly at the profile part of the partition / further, the profile I is referred to as a tray / which allows to obtain the maximum subcooling of condensate flowing in the nOTOKv the housing .2 of the heater, enters the annular space of the pipe sys tem, where the direction j of its movement is arranged by the partition; m 4. Steam passes successively all the tubes of the heating surface a, ruets condenses on them, and the remainder steam rather air-steam mixture, will go on ayut subcooled condensate flowing I through the perforated bottom of the tray 6. In pereozshazhdennom condensate performs yuschem vozdu- mixing function. co-cooler, condensation of steam residues occurs, dramatically increases the concentration of air: in the steam-air mixture and increases the efficiency of its removal through the manifold 8. The mixing air cooler, which reacts weakly to the presence of air in the steam-air mixture, has a significantly greater compactness than the same. the value of / pr: the consumption of condensed steam /, surface air cooler .; ; :; -,,: , i For the collection and directional movement | condensate Above the sides, the sides 5 are installed. The sides are welded around the perimeter of the pergord or installed deep in the tube bundle in order to create several condensate strokes for deeper re-cooling. At the installation site of the tray, the rim is not installed, so the supercooled condensate merges freely into the tray, from where it flows through the perforations on the fenders 7, which prevent the condensate from expanding from the upper partitions to the lower ones. Part of the steam condensed with on the supercooled condenser; transit: -. ,,, .., .4; v-, rf, Si,. , .-,,: the tom passes the entire pipe system, increasing the average steam flow rate in it and reducing the possibility of forming stagnant, poorly ventilated zones in it. Increasing the speed of the steam flow, improving the conditions for ventilating the pipe bundle and evacuating non-condensable gases with a flow of transit steam, Reducing the cost of organizing an air cooler of a mixing type of water heater, along with the heating temperature and increasing the temperature of the nutrient water, and increasing the temperature of the non-condensable gases, will increase the temperature of nutrient water and increase the temperature of nutrient water. increase the economy of the heater and the turbine as a whole. The presence of a mixing air cooler;: located along the entire height of the water heater and providing a more complete condensation of steam from the vapor-air; the mixture, as compared with the surface air cooler, will allow the amount of water heating to 2-4 ° C and jioBbiCHTb to decrease the efficiency of the water heater. The absence in the zone of maximum concentration of non-condensable corrosive gases / mixing air-breathing zone / heating surface, which in this case is intensely corrosive, crowns the hope of operating

apparatus ...., ..

Claims (3)

1. Verman S.S. Rasch; em heat exchangers turbostoykoy. M.-L., Gorenergridzdat, 1962, p. 178. . . 2. Catalog Heat exchange equipment № 1 -2-76. 3. USSR author's certificate No. 274140, cl. R 28 R 7/00, 1967.