JPS5927191A - Waste heat retrieving device for heat pipe - Google Patents

Abstract

PURPOSE:To retrieve the waste heat of an engine, a boiler, an industrial furnace or the like safely by a method wherein the heat pipe is utilized. CONSTITUTION:A partitoning wall 3 of an anti-corrosive material is provided between a waste heat path 1, through which the exhaust gas of the engine or the smoke of the boiler is flowing into the arrow sign direction, and a casing 2, provided in neighboring to the path 1. A plurality of heat pipes are penetrting through said partitioning wall 3 and are secured to the same by means of welding, screw sealing or the like, while a heat receiving end 5 at the lower half thereof is inserted into the waste heat path 1 and a heat emitting end 6 at the upper half thereof is inserted into the casing 2 respectively. The heat transmitting tube 7, through which fluid to be heated, such as fuel oil or the like, is flowing from the inlet port 8 to the outlet port 9 thereof, is provided in the casing 2 in neighboring to the heat emitting end 6 of the heat pipe 4. According to this constitution,the waste heat in the waste heat path 1 is transmitted into the casing 2 through a plurality of heat pipes 4 and may be retrieved by heating the fuel oil or the like through the heat transmitting tube 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The purpose of this system is to safely recover waste heat from boilers, industrial furnaces, etc. using a pipe.

Conventional exhaust heat recovery equipment of this type inserts a heat transfer tube through which a fluid to be heated such as oil flows into a heat passage such as an engine exhaust gas pipe or a boiler exhaust flue. The method used was to recover heat from the heated fluid into the inner chamber through the pipe wall, but while this method was designed for internal use and had excellent thermal efficiency, it Heat exchanger tubes are easily corroded by corrosive components such as sulfur compounds in flue gas, and when heat exchanger tubes become corroded, heated fluids such as oil leak into exhaust gas pipes or heat exhaust passages such as exhaust flues. This can cause flames or explosions, so the safety level is low, and if the heat exchanger tubes were made of F1, which has particularly excellent corrosion resistance, the equipment would become extremely expensive.

In the present invention, a cage shelter is provided adjacent to the heat exhaust passage and separated from the heat exhaust passage 1 by a partition wall, and the cage 'J
A heat transfer tube through which a fluid to be heated such as oil flows flows is provided in the cage, and a pipe is provided with a L through the partition wall that isolates the cage heat exchanger from the inside of the heat exhaust passage. Insert one end (g) into the heat exhaust passage and the heat radiation side end into the cage housing, so that the exhaust heat in the heat exhaust passage is transmitted to the heat exchanger tube in the second case through these pipes. Therefore, waste heat can be safely recovered without using a material with particularly excellent corrosion resistance for the heat exchanger tube.

I: To explain Mizumoto 1! 11 with reference to the drawing of the embodiment, (1) in the figure (η section is the exhaust heat passage where the exhaust residue from Nijishifu or υ1 smoke from Boi 5- flows in the direction of the arrow) , (2) indicates a casing provided adjacent to the heat exhaust passage (1), and a partition made of a corrosion-resistant material is provided between the casing (2) and the heat exhaust passage (1) to isolate the two. [31; one; is provided. (4) indicates a plurality of shields that penetrate the partition wall (3) and are fixed to the partition wall (4) K by welding or screw seals, and the glare shield is fixed to the partition wall (4). izu(4)ll-i
The heat receiving side end (5) of the lower half is in the heat exhaust passage (1),
The heat dissipating ends (6) of the upper halves are each inserted into the casing (2).

And in cage No. 111, No. 7 (2), there is a fuel F'-1
A heat transfer tube (7) in which a fluid to be heated such as oil enters from the inlet (8) and flows out from the outlet (9) is provided close to the heat radiation side end (6) of the 111 heat pie "j+41. In this case, the cage (2) is filled with a heat storage medium (10) such as sand, metal pieces, linear metal, or molten salt as necessary. aisle f
il i, 7J's fever is multiple shi-1-baizu (4
) to the casing (2) (η), and the heated fluid such as fuel oil flowing inside it is transmitted to the heat transfer tube (7) of the casing (21', KJ). In this case, 11
-1- From the heat radiation side end (6) of the pipe (4) to the heat transfer tube (7)
), it is sufficient to fill the casing (2) with a latent heat medium (river) such as sand or molten salt as described in 1n. As a result, even if the heat exchanger tube (4) or the partition wall (3) is corroded by the exhaust gas or sulfur compounds in the flue gas during long-term use and holes are formed, the heat exchanger tube (7) will not be damaged. Unless there is a hole, the heated fluid in the heat transfer tube (7) will not flow into the heat exhaust passage (1), and even if there is a hole in the heat transfer tube (7), the heat transfer tube (4) or Unless there is a hole in the partition wall (3), it is difficult for the heated fluid in the heat transfer tube (7) to flow out into the heat exhaust passage (1). In this case, there is no heat storage medium in the casing (2). (10), even if the heated fluid inside the heat transfer tube (7) tries to leak, the heat storage medium (10
) will prevent the A11 leakage, and the heat exchanger tube (7)
411 leakage of the heated fluid inside can be easily sensed by a suitable detector provided in the casing (2).

1-11-1 is a cage adjacent to a heat exhaust passage (a cage separated from the inside of the passage by a partition wall).
A heat transfer tube through which the fluid to be heated flows is inserted into the casing, and a heat transfer tube is inserted into the partition wall (j) through the heat transfer tube, and a heat transfer tube is inserted into the partition wall. Place one part of the carp side end into the heat exhaust passage, and place the heat radiation side end l111 into the heat exhaust passage.
Jl" is inserted into each casing, /l
The heat exchanger tube through which the fluid to be heated such as II flows is not exposed to exhaust gas or exhaust smoke in the heat exhaust passage, and its corrosion is significantly reduced.
There is no need to apply side pressure to the excellent monthly efficiency of I, and the heated fluid in the heat transfer tube is There is no leakage into the heat exhaust passage, making it extremely safe against flames and explosions.

[Brief explanation of drawings]

The drawings show examples of Mizumoto E, 11, and 1, with FIG. 1 being a longitudinal sectional front view, and FIG. 2 being a sectional view from FIG. 1 σ) 1.1-II. (1)・°・Exhaust heat passage, (2)・Casing, (3
)...Partition wall, (7)...Heat transfer tube, (4)...Shi-
Tobyzu, flol...heat storage medium. Special 1 Koma applicant: Sasakura Machinery Co., Ltd. Agent: Akio Ishii, patent attorney.

Claims (2)

[Claims] (1) Provide a cage with a heat exhaust passage (adjacent to it and isolated from the interior of the heat exhaust passage by a partition wall); First, a pipe is provided through the partition wall, and the heat receiving end of the pipe is connected to the heat exhaust passage 17<], and the heat dissipation side end is connected to the cage: ,
The waste heat recovery bag is characterized by being inserted into each bag. (2) A one-by-one waste heat recovery device characterized by filling a cage with a heat storage medium.