SU1755004A1 - Steam deaerator - Google Patents

Abstract

Use: battery tanks deaerators. The essence of the invention: battery tank 1 with columns 2 rests on bearing supports 3 and locking support 4. Inside the tank 1 with a gap relative to its body, annular stiffening ribs 5 are located above the supports 3.4. From the movements of the ribs are fixed with the help of stops 6, located on both sides of the ribs close to them and rigidly connected to the body of the tank 1. 2 Il.

Description

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The invention relates to energy and can be used in the design and modernization of deaerators.

Deaerators are known, consisting of a horizontally located accumulator tank with two carriers and one fixing support, and located on the tank of deaeration column. The battery tank of this structure is provided with large numbers of annular stiffeners welded to the side of the tank and provided with spacers in the form of triangular frames.

A disadvantage of the known construction is the low strength of the welded seams of the welding of ribs: cracks propagating near the seams propagate in the base metal of the tank shell. Og this design flaw can be eliminated by abandoning the use of stiffeners. But in this case, an increased ovality of the tank arises, significantly exceeding its permissible value even with a significant increase in the thickness of the tank wall.

1 The purpose of the invention is to increase the capacity of the deaerator without increasing its weight while ensuring minimal tank ovality.

The goal is achieved by the fact that in a thermal deaerator containing deaeration columns placed on an accumulator tank made in the form of a horizontally arranged cylindrical body with bottoms mounted on two carriers and one fixing support and provided with annular stiffeners inside the body, the body is additionally provided with rigidly fixed inside the stops, abutments adjacent to each stiffener on both sides, while the stiffeners are installed with a relative clearance These are the walls of the hull and are located above the bearing pillars and iodine center of gravity of each column.

Figure 1 shows a thermal deaerator, a longitudinal section; in fig. 2 is a section A-L ne figure 1.

The thermal deaerator contains tank 1 and de-aeration columns 2, the deaerator is supported on the supporting supports 3. In the middle part of the tank there is a fixing support A preventing the displacement of the tank 1 in the axial direction. Inside the tank 1 case, annular stiffening ribs 5 are freely installed with minimum clearance. The ribs 5 are located above the bearing supports 3 and under the center of gravity of each of the deaeration columns 2. From possible movements of the ribs 5 are fixed inside the tank 1 when

 - LATER of the help of the stops 6, located in pairs on both sides of the ribs 5 close to them and rigidly connected to the tank body 1. When the deaerator is in operation, tank 1 and partially

columns 2 are filled with water and steam is supplied under pressure. Under the effect of the indicated loads, tensile stresses arise in the wall of the tank 1 and the radius of the tank 1 increases. The annular ribs of stiffness 5 freely with a minimum gap are installed in the tank body 1. Since the ribs 5 are not connected to the tank body 1, they are not free increase of the radius of the tank 1 and do not cause the appearance of

5 tank case of additional stresses that lead to the occurrence of cracks in the welds of welding of annular stiffeners to the tank body in the design of a known deaerator.

0 In addition to the internal pressure, there are also significant concentrated forces on the deaerator, namely the weights of columns 2 (up to 20 tons without the weight of water) and the reaction of supports 3 (up to 200 tons in the hydrotest mode) Shells

5 resists well to the effects of distributed loads (vapor and water pressure) and poorly against concentrated forces. In the places where the concentrated forces are applied to them in the shells, holes are formed,

This leads to the appearance of increased stresses in the zones of application of concentrated forces and to the appearance of increased ovality in the corresponding cross sections of shells. In the proposed device in places

5 applications to the shell of concentrated forces are the carrier supports of the tank 3, as well as the zones of connection of the tank 1 with the deaeration columns. Therefore, precisely in the indicated places of the tank 3 are located annular stiffeners 5, which reduce the magnitude of the tank ovality, as well as the magnitude of the stresses in the tank.

The technical and economic efficiency of the proposed device is determined by increasing the operational reliability of the deaerator.

The proposed design of the deaerator can be used in the design and manufacture of thermal deaerators for

Claims (1)

0 thermal and nuclear power plants. Claims of the Invention A thermal deaerator containing deaeration columns placed on a battery tank made in the form of 5 horizontally arranged cylindrical body mounted on two carriers and one fixing support and provided with annular stiffening ribs located inside the body, which is so that, in order to increase reliability, it is additionally equipped with stops fixed inside the body each stiffener on both sides, with the edges stiffnesses are installed with a gap relative to the hull walls and are placed above the bearing supports and under the center of gravity of each column. Aa fig 2