SU1371959A1 - Vacuum measuring device - Google Patents

Abstract

Invention m. used in thermal power plants and in heating boilers. The purpose of the invention is to increase productivity and improve the quality of deaeration. The U-shaped box 7 is placed in the chamber 2 boiling and in its upper part communicated by pipeline with the jet compartment 1 and the pipe 9. This embodiment contributes to increasing the fluid in the box, removing gases from the non-boiling liquid first in compartment 1 and then line of steam. At values of the liquid level and the vapor pressure drop on the bubbling sheet 4, exceeding the optimal values, the branch pipe 9 of the overflow of a part of the liquid into the drainage duct is activated. One side wall of the box is adjacent to the side wall of the pallet 3, and the other is located inside the last one at the level of the retaining threshold 5, which prevents steam from entering chamber 2 into the 9 nprf of the small loads. 1 il. (/)

Description

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The invention relates to a power system and industrial heating equipment and can be used in thermal power plants and in heating boilers for heating and deaerating water.

The purpose of the invention is to increase productivity and improve the quality of deaeration.

The drawing shows a vacuum deaerator, a cross-section.

The deaerator contains an inkjet compartment 1, a chamber 2 for boiling overheated liquid with a pallet 3, a bubbling sheet 4 with a retaining threshold 5, a drainage path 6, a U-shaped box 7, submerged in a pallet 3, a pipe 8 for discharging the air-steam mixture and a water overflow branch pipe 9 .

The deaerator works as follows.

The water to be de-aerated is crushed into streams, flows onto a bubbling sheet 4 and then enters the drainage path 6. Overheated water, entering the boiling chamber 2, forms steam that flows under the bubbling sheet 4, bubbling through a layer of deaerated water and together with The gases in the bed are diverted to the jet compartment 1. The main part of the steam in the latter is condensed in jets, reheating the water to a temperature close to saturation, and the non-condensed part of the vapor-air mixture is removed to the vapor line. The non-boiling part of the superheated water is collected in the sump 3 of the chamber, fed to the bubbling sheet 4, mixed with the flow of the water treated in the streams, together with it passes a deep deaeration in the bubbling layer. Under heavy loads, the water level on the bubbling sheet 4 and in the pan 3 of the boiling chamber 2 increases. This is facilitated by the increase in pressure drop on the bubbling sheet. Connection to the jet compartment of the U-shaped box 7 creates a vacuum in it relative to

pressure in boil chamber 2. This contributes to an increase in the level in the box 7 and to the removal of gases from the non-accumulated liquid, first into the jet compartment 1 and then into the vapor line. When the values of the fluid level and

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vapor pressure drop on. A bubbling sheet exceeding the optimum values for a stable hydroxide and effective deaeration is included in the work of the branch pipe 9 of the overflow of a part of the liquid into the drainage duct. This increases productivity. The start of the overflow is determined by the level of location of the pipe 9 above the bubbling sheet 4. When the load decreases, the vacuum in the box 7 decreases and the liquid level drops, which leads to the cessation of the overflow and the restoration of the calculated hydrodynamic regime. Steam from chamber 2 into pipe 9 at low loads is prevented due to flooding of box 7 in pan 3 at retaining threshold 5 of bubbling sheet A. This level ensures that no steam leaks into box 7 with the lowest possible water level on the bubbling sheet. The suction of the vapor-air mixture from the duct in these modes does not stop, since the pressures in the duct 7 and compartment 1 are still positive. This helps to improve the discharge of gases from the liquid and to improve the quality of water in general.

Claims (1)

Invention Formula A vacuum deaerator containing an inkjet compartment located in the housing, an overheated liquid boiling chamber with a sump, a bubbling sheet with a retaining threshold and a deaerated water outlet pipe connected to the water line and deaerated deaerated, in order to improve performance and improve the quality of deaeration deaerated water. equipped with a U-shaped box placed in the boiling chamber, one side wall of which is adjacent to the side wall of the pallet, and the other is located inside the latter at the level of a retaining threshold, and Rob, in its upper part communicated with piping additionally installed jet compartment and an additional nozzle mounted in the plane of permissible water layer height to bubble sheet with deaerated water outlet pipe. VNIIPI Order 456/23 Random polygons pr-tie, Uzhgorod, st. Project, 4 Circulation 851 Subscription