SU1730526A2 - System for cleaning cooling water of steam turbine condenser - Google Patents

Abstract

This invention relates to cooling water purification systems supplied to a turbine condenser. The purpose of the invention is to increase efficiency. The system contains a filter installed at the inlet to the condenser with a curved concave opposite to the flow of cooling water with a perforated surface and a suction device with a contaminant intake. Additionally, the perforated surface on the concave side is divided by radial partitions into compartments, the open side of which has the shape of a rectangle that coincides with the cross section of the inlet section of the soil intake, which increases the efficiency of suction of soils. 3 il.

Description

This invention relates to cooling water purification systems supplied to a steam turbine condenser.

A known system for purifying the cooling water of a steam turbine condenser, comprising a supply and discharge conduits connected to the input and output chambers of the condenser, respectively, supply and discharge conduits, a filter with a curved concave opposite to the flow of cooling water, placed inside the filter, a suction device with a contactor. adjacent to the perforated surface, and communicated by pipeline with a discharge conduit, and the filter is placed inside the entrance chamber capacitors, and the contaminant intake is made with at least one

entrance area and installed with the possibility of angular return movement.

The disadvantage of this system is the difficulty of removing all types of contaminants, in particular filamentous algae, as well as large debris (pieces of wood, fish stones, etc.).

The purpose of the invention is to increase the efficiency, effectiveness and efficiency of cleaning.

Figure 1 shows the cooling water cleaning system of a steam turbine condenser; figure 2 is a view of And figure 1; fig. 3 shows a fragment of a filtering surface with a contamination intake of three types: a) directly adjacent

perforated surface, b) with elastic ends of the walls, c) with an intermediate chamber.

Condenser 1 with tubes 2, input 3 and output 4 cameras equipped with VJ system

SA O SL GO

about

Yu

my cleaning tubes, including a filter with a cylindrical perforated surface 5, having holes 6 and flat end walls 7.

The suction device is made in the form of a rotary collector 8 installed along the axis of the perforated surface 5 with an intake of 9 contaminants adjacent to the specified surface. A pipeline 10 is connected to the collector to discharge contaminants into the cooling water flowing through the condenser from the pressure 11 to the drain 12 conduits.

Rotational movement of the collector 8 with the intake 9 is carried out through the reducer 13 from the electric motor 14. Differential pressure gauge 15 is designed to measure the differential pressure on the perforated surface 5. Using the valve 16, the discharge of contaminants 12 is automatically switched on via a signal from the differential pressure gauge 15.

Radial partitions 17, adjacent to the concave side of the perforated surface 5, divide it into compartments 18. Elastic ends 19 on the walls of the intake 9 allow reducing water inflow into it.

The system works as follows.

Cooling water with contaminants through the pressure circulating conduit 11 flows to the inlet water chamber 3 of the condenser 1. At the same time, the contaminants that are larger than the diameter of the holes 6 remain on the perforated filter surface 5 in the compartments 18, and the purified water passes through the holes 6 perforations, tube 2 and further enters the drain conduit 12. The accumulation of contaminants increases the hydraulic resistance of the filter. When it reaches the permissible value of the signal from the differential pressure gauge 15, the electric motor 14 is turned on and the valve 16 is opened on the pipeline 10. At the same time, the collector 8 makes periodic rotations on both sides by the reduction gear 13 to the radial value ynja of the covering filter surface. This angle is close to 180 °, but depending on the layout conditions of the filtering surface in the condenser water chamber, it may differ somewhat in one direction or another, i.e. a 180 ± 28 °. When the collector 8 rotates, the contamination sampler 9 continuously passes over all compartments 18, in which at the moment of its passage a reduced pressure zone is created. Magnitude

The negative pressure drop created on the filtering surface of this intermediate chamber is determined by the pressure difference in the pressure 11 and drain 12 water conduits and the hydraulic resistance of the pipeline 10. Under the action of this pressure difference in the compartment 18 adjacent to the soil intake 9, the reverse movement of water begins perforation holes 6 of the filtering surface 5, which carries with them those located in the contamination chamber through the collector 8 and the pipeline 10 to the drain conduit 12.

After the differential pressure on the differential pressure gauge 15 is restored to a normal value, the motor 14 shuts off according to the signal issued by it and the valve 16 closes.

When the intake 9 is in direct contact with the perforated surface 5 (FIG. Za), only those contaminants that are smaller than the gap d between the inlet section of the intake 9 and the perforated surface 5 can get into its suction cavity, and the suction capacity of the intake and, therefore, , the removal efficiency of contaminants is inversely proportional to the size of the gap due to the growth of the parasitic flow of water penetrating into the suction cavity.

With elastic ends 19 of the walls of the intake 9 (Fig. 3b), the magnitude of the parasitic water flow somewhat decreases while maintaining the limitations on the size and shape of the suction of contaminants. In addition, the elastic end displaces the contaminants when the inlet 9 moves and reduces thereby the cleaning efficiency of the filtering surface five.

In the presence of compartments 18 (Fig. 3b), the contaminants accumulated in these chambers are located in them without the possibility of moving along the filtering surface until the inlet section of the inlet 9 is aligned with the open part of the intermediate chamber. At this moment, all contaminants are torn off from the surface, carried by the reverse flow of water penetrating from the clean side of the filter through the openings 6 of the surface 5. Due to the minimum possible suction of water through the gap, the suction capacity of the intake in this case is maximum. As shown by the experienced test, a quick, effective filter cleaning is provided with a slow non-stop rotation of the intake 9.

Claims (1)

Claims of Invention The system of purification of the cooling water of a steam turbine condenser according to auth.St. Mg 1431455, different with that. that, in order to increase efficiency, a perforated filter surface with a concave P This side is equipped with solid radial partitions adjacent to it, while the open side of the compartments between the partitions coincides in shape with the entrance section of the contaminant intake and has the shape of a rectangle. Type A Fig2 Figz