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Box type high-voltage heater

A technology of high-pressure heaters and headers, which is applied in the direction of feed water heaters, heat exchanger types, heat exchanger shells, etc., can solve the problems of inconvenient production, high quality risk, inability to adapt to variable load operation and peak shaving operation, etc. Achieve the effects of shortening the construction period, ensuring safe operation, and avoiding the risk of deformation due to temperature difference

Active Publication Date: 2014-02-05
孔泽学 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a header-type high-pressure heater, which solves the inconvenience and quality of the existing high-pressure heaters that must have thick tube sheets and heads when they are used in thermal power units greater than 750MW (megawatts). High risk, unable to adapt to variable load operation and peak shaving operation

Method used

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  • Box type high-voltage heater
  • Box type high-voltage heater
  • Box type high-voltage heater

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment one, see figure 1 , a header-type high-pressure heater, including a shell 1, a pair of headers 2 and a number of heat exchange tubes 3.

[0023] The shell 1 is a horizontal structure. Of course vertical structures are also possible.

[0024] The header 2 is cylindrical. The two headers in the pair of headers 2 are the water inlet header 21 and the water outlet header 22 respectively. A pair of headers 2 are located inside the casing 1 . Two of the pair of headers 2 are distributed at both ends of the casing 1 along the axial direction. The wall thickness of the header box 2 is 80 mm (calculated according to the material, the thickness of different materials is different, in this embodiment, it is the thickness when the same material as the existing tube sheet is used). A water hole 23 is provided on the peripheral wall of the header box 2 . The number of water holes 23 on each header 2 is about 2100 (according to the calculation of the diameter of the h...

Embodiment 2

[0028] Embodiment two, see image 3 , the difference from the first embodiment is: the end of the heat exchange tube 3 is plugged into the tube base 24 . Weld 8 is a fillet weld.

Embodiment 3

[0029] Embodiment three, see Figure 4 , the difference from the first embodiment is: the end of the heat exchange tube 3 is plugged into the water hole 23 . The heat exchange tube 8 and the header 2 are welded together.

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Abstract

The invention relates to heat exchange equipment, in particular to a box type high-voltage heater. The box type high-voltage heater comprises a water inlet chamber, a water inlet pipe plate, a water outlet chamber, a water outlet pipe plate and a plurality of heat exchange pipes, wherein two ends of each heat exchange pipe are connected together with the water inlet pipe plate and the water outlet pipe plate. The high-voltage heater is characterized by further comprising a pair of cylinder-shaped headers having functions of both tube plates and water chambers, the interior space of one header forms the water inlet chamber; the surrounding walls of the header form the water inlet pipe plate; the interior space of the other header forms the water outlet chamber; the surrounding walls of the latter header form the water outlet pipe plate. The high-voltage heater provided by the invention solves the problems that when a current high-voltage heater is applied to a thermal power generating unit above 750 MW, a thick tube plate and a thick sealing head are indispensable parts, the manufacturing is inconvenient, the application risk is high, the quality risk is high, and the current high-voltage heater is not suitable for variable load operation and peak-load regulation operation.

Description

technical field [0001] The invention relates to heat exchange equipment, in particular to a header-type high-pressure heater. Background technique [0002] The high-pressure heater is a device located between the feedwater pump and the economizer or evaporator in the feedwater recuperation system of the power plant, which uses steam turbine extraction to heat the high-pressure feedwater. A high-pressure heater is disclosed in the Chinese patent application number 2011104206739, published on May 2, 2013, and titled "Nuclear Power Horizontal High-Pressure Feedwater Heater and Its Heating Method". [0003] The structures of existing high-pressure heaters are all the same as those in the above-mentioned patents, including a shell, a tube sheet with a flat plate structure arranged at one end of the shell, a hemispherical or other shaped head connected to one side of the tube sheet, and a tube sheet connected to the other side of the tube sheet. On one side of the "U" shaped ...

Claims

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Application Information

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IPC IPC(8): F22D1/32F28F9/02F28D7/10
Inventor 孔泽学李本广
Owner 孔泽学
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