SU1354616A1 - Deaeration installation - Google Patents

Abstract

The invention relates to thermal and nuclear energy im.b. The invention allows to increase the efficiency of deaeration. The surface heat exchanger (T) 19 is made with horizontal pipes sectioned in height, one of the ends of which is connected to the annular space 20 T 19, and others h section x except for the bottom, with pipes (P) 17 and 18 for removing steam from evaporation chambers (K) 11 and 12. Deaerated water is sprayed on pipes T 19, where it heats and boils due to heat from condensation inside the pipes. Partially deaerated water flows downward and through pipe 21 enters the first stage 4 of the surface evaporator 3. Moving through the tubes of stage 4 from the bottom up, the water overheats and boils. Overheated water and steam from step 4 through P 13 enters K 11, where its vigorous boiling occurs. The water freed from steam and gases from the bottom of K 11 flows through P 16 to the second stage 5 of the evaporator 3, where it again heats up and boils again to K 12. Then the water passes through the third stage 6 of the evaporator 3 and enters the storage tank, i 1 il. with e (L with yy Z3 00 sd 4 o

Description

113546

The invention relates to the field of thermal and arortiKiH power engineering and can be used to prepare sub-tags1 :) The 1st substage of heat-and-power plants.

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

The drawing shows schematically the proposed deplanation setup. It contains a deaerator 1 with a tank-battery 2 and a multi-core surface evaporator 3, including evaporation stages 4,5,6 .. The evaporator 3 has 7.8 branch pipes, water, and a discharge agent 1. In the deaerator 1, a spraying device 9 is installed, connected to a pvtrubka 10 for supplying deaerated water. Deaerator 1 is equipped with chambers 20 skipani 11 and 12 with branch pipes 13 and 14 for supplying steam-water mixture from the mate 3, branch pipes 15, 16 of the water discharge and branch pipes 17 and 18 of the outlet ara. Under the spraying device 25 9 there is a surface heat exchanger 19 with horizontal pipes sectioned along the height, one of the ends of which is connected with the annular space 20 of the heat exchanger 19, and others in the sections other than the lower one - with pipes 17 and 18 removal of steam from chambers 11 and 12. The inlet of the first stage 4 of the evaporator 3 is connected by a pipe 21 to the annular space 20, the output of the last (third) stage 6 is connected to the storage tank 2, and the inputs and outputs of the drup-gx stages are connected respectively to the nozzles 13 -16 steam supply with esi Q and dewatering of the evaporation chambers 11 and 12. In the deaerator 1 is located as a vapor cooler 22 with pipe 23 and 24 for supplying and removing cooling water. In the upper g of the deaerator there is a gas outlet 25, and in the lower part there is a branch pipe 26 of the deaerated water.

The deaeration unit operates as follows. The water to be deaerated through the pipe 10 is fed into the spray device 9 and sprayed onto the tubes of the heat exchanger 19. The stack is thin. -G

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film on the surface of the horizontal tubes of the heat exchanger 19, the water is heated to the boiling point and boils. Heating and

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boiling is carried out by the heat from the condensation of steam inside the tubes. In this case, the main part of the dissolved gases contained in it is released from Water. Partially deaerated water flows down and through pipe 21 enters the first stage 4 of the surface evaporator 3. Moving through the tubes of the first stage of the evaporator from the bottom up, the water overheats and starts to boil again due to the heat of the heat carrier, pipe 7. Overheated water and steam from the first stage into the chamber 11, where there is a rapid boiling of water. In this case, dissolved gases are emitted from the water along with the steam. The water released from steam and gases from the bottom of chamber 11 enters the second stage 5 of the evaporator 3, where it is heated again and then boils in the chamber 12. Next, the water passes through the third stage 6 of the evaporator 3 and enters the storage tank 2. Each time the boils In chambers 11 and 12, very favorable conditions are created for the evolution of dissolved gases: intensive flow fragmentation, which ensures high mass transfer and a developed degassing surface, as well as rapid removal of gases from the resulting vapor from the water. As a result of this tank, water reaches the water, almost completely devoid of oxygen and other gases. The water to be deaerated is discharged from the apparatus through the nozzle 26.

In the chambers 11 and 12, secondary steam containing some is formed. the amount of gases discharged into the tubes of the heat exchanger 19. Here, the main part of the steam condenses. The uncondensed steam enters the annular space of the heat exchanger, where, moving upwards, plays the role of ventilation steam and, blowing the water film flowing down the outer surface of the tubes, carries are gases released from deaerated water. The vapor-gas mixture leaving the heat exchanger 19 enters the evaporation cooler 22, where the main part of the steam condenses and the condensate that forms flows down and the gases are cooled. Then the gases from P546

water from the apparatus through the pipe 25.

The organization of repeated boiling of deaerated water creates favorable conditions for the removal of gases dissolved in it, which increases the efficiency of deaeration.

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Claims (1)

Invention Formula A deaerating unit containing a deaerator with a battery tank and a nozzle. A supply of deaerated water connected to a spraying device, and a surface evaporator with supply and removal nozzles of a heating agent, characterized in that, in order to increase the deaeration efficiency, the deaerator is additionally equipped along the edge 0 five 0 sixteen To the least, two cannons of Mt.Kittni with nozzles supplying a steam of a native mixture, drainage of water and sp and a surface heat exchanger with sectionally elevated horizontal pipes, one of the ends of which are Connected to the annular heat exchanger and others in sections . in addition to the lower one, with pipes for removing steam from the chambers, and the evaporator is at least three-stage, with the input of its first stage being connected by pipeline with the annular space of the heat exchanger, the output of the latter with the accumulator tank, and the outputs and inputs of the other stages are connected respectively with the pipes supplying the steam-water mixture and draining water from the evaporation chambers,