RU162602U1 - HORIZONTAL NETWORK HEATER COMPENSATOR - Google Patents

Abstract

Compensator horizontal network heater, characterized in that it is installed radially between the body and the edge of the tube plate with a reduced diameter.

Description

The technical solution relates to a power system, to devices for compensating for temperature extensions in network type horizontal heaters.

Known plate compensator built into the tube plate (patent No. 2382940 dated March 31, 2008), which, as experience has shown, is used at elevated pressures of network water 1.6-2.5 MPa and a maximum heating temperature of up to 250 ° C in PSG- heaters 2200-3-16, PSG-1250-3-18 with brass tubes.

In heaters of the PSG-4900-2-11.4 type with a water pressure of 1.1 MPa and a heating temperature of up to 320 ° C with steel tubes, a five-lens horizontal compensator built into the housing is currently used.

For the prototype, we take a lens compensator built into the case, which is currently used in horizontal type network heaters with a network water pressure of 0.8-1.1 MPa (Brodov Yu.M. et al. Heat exchangers of power plants. Yekaterinburg, Sokrat Publishing House . 2003, Fig. 4.11), which has the following disadvantages:

- In the lens compensator, no more than 4 lenses are installed from the recommendations on stability conditions (ibid., P. 640), but to fully compensate for the tube elongations, a larger number of lenses are necessary, therefore, in existing heater designs, the compensators have increased voltages (in some modes exceeding 10- 20% permissible stresses) and a limited service life (about 10 years).

- The lens compensator is large and worsens the steam supply to the tube bundle.

The objective of the claimed technical solution is to eliminate these shortcomings. This goal is achieved by supplementing or replacing the horizontal lens compensator integrated in the housing with a radial compensator located between the housing and the tube plate. A radial compensator 5, consisting of radial plates and lenses, is proposed to be located between the housing 1 and the edge of the tube plate 2 (Fig. 1). To do this, it is necessary to minimize the diameter of the tube plate (the minimum diameter of the tube plate is determined by the diameter of the body of the water chamber 3 and the location of the outer tubes 4) and arrange a radial compensator in the free space, consisting of radial plates and lenses. For a more even voltage across the entire length, a plate of two parts of different thicknesses is recommended. This design is applicable for moderate temperatures of heating water to 250 ° C and, as a rule, for brass tubes.

For higher temperatures (up to 320 ° C) and steel tubes, it is necessary to combine the radial compensator 5 with the lens horizontal compensator 6 integrated in the housing (Fig. 2). At the same time, the number of lenses of the horizontal compensator decreases to the permissible by the stability conditions (4 lenses) and the heat transfer of the tube zone adjacent to the tube plate improves.

Thus, the proposed radial compensator can be independent when heating network water to 250 ° C and as an addition to the horizontal lens compensator at elevated heating temperatures to 320 ° C.

The radial compensator has the following advantages:

- Does not clutter the steam supply to the ends of the tubes and improves heat transfer.

- Reducing the diameter of the tube plate saves 2-2.5 tons of metal and reduces the total weight of the network heater.

Claims (1)

Compensator horizontal network heater, characterized in that it is installed radially between the body and the edge of the tube plate with a reduced diameter.

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