JPH08327262A - Rotary regeneration type heat exchanger for high-temperature exhaust gas - Google Patents

Abstract

PURPOSE: To develope seal effect, not inferior to a conventional heat exchanger, by maintaining elasticity in a high-temperature atmosphere without receiving any affection of high-temperature oxidizing and the like. CONSTITUTION: In a rotary regeneration type heat exchanger for hightemperature exhaust gas, which is constituted of a rotor 11, into which heat transfer element is loaded, and a rotor post 1, supporting the rotor 4 rotatably, a radial seal 14 is fixed to the sector plate 17 of fixed side and the radial seal 14 is covered by a heat insulating material 18. On the other hand, a circumseal 15 is fixed to the sector plate 17 of fixed side and the circumseal 15 is covered by the heat insulating material 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary regenerative heat exchanger used for heat recovery from high temperature exhaust gas of about 800 to 1000 ° C. discharged from an industrial furnace or the like.

[0002]

2. Description of the Related Art In a conventional rotary regenerative heat exchanger for high temperature exhaust gas, various seals are provided to prevent fluid such as exhaust gas on the high pressure side from leaking to the low pressure side. These seals are fixed to the rotor and the housing by fixing means such as bolts and nuts. The seal wears as it slides on the sector plate, circum seal ring, etc., but because it is a thin plate, it is possible to follow the increase and decrease in the gap due to load fluctuation due to the elasticity of the seal itself, and to reduce the sliding resistance. It is reducing.

[0003]

However, the above-mentioned conventional rotary regenerative heat exchanger for high temperature exhaust gas has the following problems to be solved. 1) Since the seal is directly exposed to high temperature exhaust gas, there is a problem in that it cannot maintain its characteristic elasticity. 2) Since the seal is affected by high temperature oxidation, there is a problem that conventional seal materials cannot be used.

The present invention has been made in order to solve the above-mentioned conventional problems, and its purpose is to maintain elasticity without being affected by high-temperature oxidation in a high-temperature atmosphere, and not inferior to conventional ones. It is an object of the present invention to provide a rotary regeneration heat exchanger for high temperature exhaust gas that can exhibit a sealing effect.

[0005]

In order to solve the above problems, a rotary regenerative heat exchanger for high temperature exhaust gas according to the present invention comprises a rotor loaded with a heat transfer element and a rotor post rotatably supporting the rotor. In the rotary regeneration type heat exchanger for high temperature exhaust gas, the radial seal is fixed to the fixed side sector plate, and the radial seal is covered with a heat insulating material. Further, the rotary regenerative heat exchanger for high temperature exhaust gas of the present invention is a rotary regenerative heat exchanger for high temperature exhaust gas, which comprises a rotor loaded with a heat transfer element and a rotor post that rotatably supports the rotor. The circum seal is fixed to the sector plate and the circum seal is covered with a heat insulating material. Further, the rotary regenerative heat exchanger for high temperature exhaust gas of the present invention is a rotary regenerative heat exchanger for high temperature exhaust gas, which comprises a rotor loaded with heat transfer elements and a rotor post that rotatably supports the rotor. The post seal is fixed to the sector plate and the post seal is covered with a heat insulating material. The sector seal, radial seal or post seal is made of ceramic fiber.

[0006]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a rotor post, which has an inner / outer double structure of an inner peripheral side rotor post shell 1a and an outer peripheral side rotor post shell 1b, and an air passage P is formed therein.

The upper and lower ends of the air passage P are open to the atmosphere, and cooling air flows in from the lower side and flows out from the upper side by natural convection. In addition, in order to increase the cooling effect, air may be forced to convect with a fan or the like.

The upper end of the rotor post 1 is supported by a guide bearing 3 via a high temperature side trunnion 2. The lower end of the rotor post 1 has a support bearing (not shown) through a low temperature side trunnion (not shown).
Supported by

Reference numeral 4 denotes a rotor, which is internally provided with, for example,
A high temperature element 5 such as a ceramic element is loaded. In addition, a low temperature element such as a steel element is loaded in the lower rotor 4.

Reference numeral 6 is a high temperature exhaust gas inflow duct, 7 is an air outflow duct, and 8 is a rotor housing. Around the rotor post 1, a heat insulating material 9 is coated, and around the upper rotor 4, a heat insulating material 10 is also coated. In addition, the inner surface of the rotor housing 8 is
The heat insulating material 11 is coated from the high temperature side to the low temperature side, and the heat insulating materials 12 and 13 are also coated on the inner surface portions of the exhaust gas inflow duct 6 and the air outflow duct 7.

Reference numeral 14 is a radial seal (see FIGS. 2 and 3), 15 is a circum seal and 16 is a post seal, both of which are fixing tools (not shown) such as bolts and nuts on the fixed side sector plate 17. Fixed by
It is covered with a heat insulating material 18 so as not to be exposed to high temperature exhaust gas. The radial seal 14 is made of, for example, a material having excellent heat resistance such as ceramic fiber.

The heat insulating materials 9, 10, 11, 12, 13, and 18 are generally widely used inexpensive heat insulating materials such as ceramic felt.

[0013]

In a rotary regenerative heat exchanger for high-temperature exhaust gas, which comprises a rotor loaded with heat transfer elements and a rotor post that rotatably supports the rotor, a radial side seal, a circum seal or a post is attached to a fixed side sector plate. Since the seals are fixed and these seals are covered with a heat insulating material, elasticity can be maintained in a high temperature atmosphere without being affected by high temperature oxidation and the like, and a sealing effect not inferior to the conventional one can be exhibited.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a high temperature part of a rotary regeneration heat exchanger of the present invention.

FIG. 2 is a vertical cross-sectional view of a radial seal portion.

FIG. 3 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotor post 1a inner circumference side rotor post shell 1b outer circumference side rotor post shell 2 high temperature side trunnion 3 guide bearing 4 rotor 5 element 6 exhaust gas inflow duct 7 air outflow duct 8 rotor housing 9 heat insulating material 10 heat insulating material 11 heat insulating material 12 Thermal insulation 13 Thermal insulation 14 Radial seal 15 Circum seal 16 Post seal 17 Sector plate 18 Thermal insulation P Air passage

Claims (4)

[Claims] 1. A rotary regenerative heat exchanger for high temperature exhaust gas comprising a rotor loaded with a heat transfer element and a rotor post for rotatably supporting the rotor, wherein a radial seal is fixed to a fixed side sector plate, and A rotary regenerative heat exchanger for high-temperature exhaust gas, characterized in that the radial seal is covered with a heat insulating material. 2. A rotary regenerative heat exchanger for high temperature exhaust gas, comprising a rotor loaded with a heat transfer element and a rotor post rotatably supporting the rotor, wherein a circum seal is fixed to a fixed side sector plate, and A rotary regenerative heat exchanger for high-temperature exhaust gas, characterized in that the circum seal is covered with a heat insulating material. 3. A rotary regenerative heat exchanger for high temperature exhaust gas, comprising a rotor loaded with a heat transfer element and a rotor post rotatably supporting the rotor, wherein a post seal is fixed to a fixed side sector plate, and A rotary regenerative heat exchanger for high-temperature exhaust gas, characterized in that the post seal is covered with a heat insulating material. 4. The rotary regenerative heat exchanger for high temperature exhaust gas according to claim 1, 2 or 3, wherein the sector seal, radial seal or post seal is made of ceramic fiber.