SU1317231A1 - Deaerator - Google Patents

Abstract

The invention relates to heat engineering and m. used for thermal deaeration (D) of water in power plants. The invention makes it possible to improve the quality of the D. Heating steam coming under the plate (T) 3 provides in the bubble layer on T 3 when in contact with WATER the final heating and D of water. With increasing thermal and hydraulic loads, the gas content of the liquid layer on T 3 increases dramatically. As a result, the entire layer turns into foam, which, not having fully collapsed, is transferred to the hydraulic seal tray 5. The heating steam through the opening 9 in the partition 8 enters into the adjacent to the latter from the side opposite to T 3 elements of the gas outlet device 7. The steam passes through the latter, forming an additional 5– barbote stage. Water is drained from T 3 into U-shaped elements through a gap below threshold 4. 1 sludge. (L with Separate Feed Pods

Description

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The invention relates to heat engineering, namely to thermal deaerators, and can be used for thermal deaeration of water, mainly in power plants.

The aim of the invention is to improve the quality of deaeration.

The drawing shows a deaerator, a longitudinal section,

The deaerator includes a housing 1 in which a jet compartment with a water distributor 2 is located, a main barbotage stage with a plate 3 and a water overflow threshold 4, a water overflow valve 5 and an additional bubble stage made in the form of a chamber 6 in which the gas outlet is built in a gas discharge device 1 The venting device 7 consists of U-shaped elements. The vertical partition 8 is lowered into the pallet of hydrazatvor 5, attached to the plate 3 under the threshold 4 and has an opening 9 connecting the chamber 6 with the steam space of the housing 1. Adjacent to the opening is a G-shaped visor 10, the Chamber 6 is placed in the overflow trap 5 and is adjacent to the partition 8 from the side opposite the plate 3. The threshold 4 is installed above the plate 3 with a gap for the passage of water.

The deaerator works as follows.

The cold streams of water to be deaerated flow into the water distributor 2, from where they are streamed to the bubble plate 3, pass along it, then through the gap the sub-valve 4 flows into the U-shaped elements of the flue gas device 7 and through the hydraulic lock 5 is diverted to the storage tank (not shown)

The heating steam supplied to the bottom of the column passes through the main bubbling stage, providing in the bubbling layer on the plate 3 upon contact with water, the final heating and deaeration of water, then enters the space under the water distributor 2, where it is condensed in water jets, preheating and rough deaeration last in the jet compartment.

A mixture of non-condensed vapor in the streams and released aggressive gases (vapors), as well as the exhaust gas from chamber 6 through the U-shaped vapor of the gas exhaust device 7

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the vapor-gas mixture is removed from the deaerator.

With increasing thermal or hydraulic load gas content

the layer of liquid on the plate 3 increases sharply, the layer in the whole volume turns into foam, which does not have time to completely collapse and is blown into the trap of the hydraulic seal 5.

Heating steam through holes 9

in the partition B, it enters chamber 6 under U-shaped elements and, capturing the vapor-air mixture accumulating under them, passes through the elements,

I will form an additional bubbling step.

At low loads, the water passes the bubble plate 3 and freely drains through the slots of the U-shaped elements of the device 7.

The reduction of the gas content of the column of the confluent liquid in the discharge canape, achieved with this method of removal of the vapor-liquid mixture, allows

increase the density of the drained fluid and thereby increase the allowable pressure drop across the bubbling yct solution.

In addition, the speed increases.

draining the fluid through the hydraulic lock 5 and, as a result, the capacity of the latter increases, which leads to an increase in the maximum load of the deaerator,

Thus, the use of the invention will improve the quality of deaeration.

Claims (1)

Invention Formula A deaerator containing a main bubbling stage with a plate and overflow threshold installed in the housing, a overflow water lock with a vertical partition attached to the plate under the threshold, and an additional bubbling stage in the form of a chamber communicating with the steam space, in which it is embedded A gas venting device, characterized in that, in order to increase the quality of deaeration, the chamber is placed in the overflow drain, adjacent to its partition with the side opposite the plate, and the threshold is set above the latter with a gap for the passage of water from the barrel to the chamber lid.