JPS59120710A - Exhaust gas purifying heat exchanger - Google Patents

Abstract

PURPOSE:To form the whole device in a small size and light weight and improve the collective efficiency of exhaust heat, by concentrically providing a catalytic layer, heat insulating air layer and a filling layer in a casing equipping a gas supply port and an exhaust port and arranging a heat transfer pipe, allowed to penetrate the casing, in the filling layer. CONSTITUTION:A gas supply port 2 of high temperature fluid by exhaust gas is provided in the front face 1a of an enclosed casing 1 of bottomed cylindrical shape, further an exhaust port 3 of exhaust gas exchanging the heat is provided in the peripheral surface of the casing 1. Then a catalytic layer 4 is provided by a separating cylindrical member 5 of wire net in the casing 1 where the gas supply port 2 is positioned, further a heat insulating air layer 6 is provided by an intermediate separating cylindrical member 7 of wire net in the outside of the cylindrical member 5. Further a filling layer 8 is provided by an outer separating cylindrical member 9 of wire net in the outside of said cylindrical member 7, and a coiled heat transfer pipe 10 penetrating the casing 1 is arranged in this filling layer 8. In such way, the efficiency of heat exchange between the high temperature fluid supplied from the gas supply port 2 and the fluid to be heated supplied in the heat transfer pipe 10 can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an exhaust gas purification heat exchanger that exchanges heat while purifying, for example, engine exhaust gas.

[Technical background of the invention and its problems]

-i, exhaust heat recovery means for engine exhaust gas is performed by an exhaust gas purification device and an exhaust heat recovery heat exchanger.

In particular, in order to promote the purification reaction under high-temperature conditions by the catalyst exhaust gas, the exhaust gas purification device is disposed on the high temperature side (upstream side) of the exhaust gas flow n. Heat for exhaust heat recovery9. As a result of this, the exhaust gas temperature at the inlet of the heat exchanger for exhaust heat recovery decreases, resulting in a decrease in exhaust heat recovery efficiency. or,
Since the exhaust gas purification device and the exhaust heat recovery heat exchanger are installed in a connected manner, not only does the overall device become larger, but heat loss due to the PA radiation increases, resulting in Also, since the heat transfer force that is applied to the heat exchanger is positive in the front and rear directions, there are drawbacks such as a large loss of flow rate VtE on the side of the heated fluid.

[Purpose of the invention]

The present invention was made in view of the following two problems: 1. The exhaust gas purification means using a catalyst and the heat exchange means for exhaust heat recovery are integrally constructed, so that the entire device can be made compact and easy to use, and the exhaust heat recovery efficiency can be improved. [Summary of the Invention] The present invention provides a catalyst layer made of catalyst particles and a heat insulating air layer in a cushioning provided with an air supply port and an exhaust port. and a packed bed 2 made of heat exchange particles 2. Each partition wire mesh tube is provided in the same manner in order from the inside to the outside, and heat exchanger tubes 1 are provided in the packed bed.
The casing χ is disposed through the casing χ to make it small and light, and is configured to improve heat exchange efficiency.

[Embodiments of the invention]

Hereinafter, the present invention will be described with reference to an illustrated embodiment.

In FIGS. 1 and 2, reference numeral 1 denotes a sealed cylindrical casing with a bottom, and the front surface of the casing has a groove 1. An air supply loco for high-sludge fluid using air gas is provided, and a part of the outer peripheral surface of the casing 1 is provided with an exhaust port 3 for heat-exchanged exhaust gas. In addition, the casing where the air supply port 2 is located/
For example, a group of catalyst particles is catalyzed by a catalyst in which platinum is supported on granular alumina oxide f11. A metal copper cylinder 7 is used as a partition to form a heat insulating air layer 6 on the outside of the partition metal cylinder 7. In addition, inside the casing located on the outside of this partitioned metal steel cylinder 7, there is, for example, a packed layer K made of hot heat-reduced particles such as granular alumina oxide, sand, or glass beads. is provided by a 79-partition gold-copper cylindrical body, and the heat exchanger tubes 10 formed in a helical shape are disposed in this filling layer so as to pass through the casing. .

Therefore, the fluid to be heated is now supplied into the heat transfer tube 10 in the direction indicated by the arrow in FIG.
High temperature fluid caused by exhaust gas? Catalyst N in the above casing l
Supply to Hironai. Then, this catalyst bed layer reduces, for example, carbon monoxide in the exhaust gas to carbon dioxide, and also flows into the packed bed through the heat insulating air layer 6.
Therefore, the high-temperature fluid that has flowed into the packed bed exchanges heat with the heated fluid flowing through the heat transfer tubes 70, and then is exhausted to the outside of the machine from the exhaust port 3. On the other hand, the heat exchanger tube 70 that has undergone heat exchange
The heated fluid inside is taken out of the machine in a heated state.

In this way, the present invention includes a catalytic purification means for exhaust gas using a catalyst, an exhaust heat recovery heat exchange means using heat transfer tubes 10 screwed in the packed bed, and a casing concentrically configured. By doing so, it is possible to reduce the size and weight and improve the heat recovery efficiency from exhaust heat. [Effects of the Invention] As described above, according to the present invention, the In the casing l, there is a catalyst layer formed by a group of catalyst particles, a heat insulating air layer 6, a packed layer g2 formed by a group of heat exchange particles, each partitioning gold-copper cylindrical body j, 7. The heat exchanger tubes 1 are provided in order from the inside to the outside according to the same Ib, and are provided in the packed bed ♂.
Since the casing is installed through the casing, the entire device can be made smaller and lighter, and the heat exchange efficiency can be improved. This prevents deterioration of the function and also prevents condensed water droplets from flowing into the catalyst layer when not in use.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an exhaust gas purification heat exchanger according to the invention;
FIG. 2 is a sectional view taken along the chain line A-AK in FIG. 1. l...Casing, λ...Air supply port, 3...Exhaust port, Hiroshi...Catalyst layer, J...Partition gold copper cylinder, 6...Insulating air layer, 7...Medium Partition steel cylindrical body,...filling layer,
ri...outer partition wire mesh cylindrical body, 10...heat exchanger tube 5,

Claims (1)

[Claims] / A catalyst layer made of a group of catalyst particles, an insulating air layer, and a packed layer of a group of heat exchange particles are concentrically arranged inside a casing equipped with an air supply port and an exhaust port by each partition wire mesh tube. 1. An exhaust gas purification heat exchanger characterized in that the heat exchanger tubes are provided in sections from the front to the outside, and heat transfer tubes are disposed in the packed bed by penetrating the casing. The exhaust gas purification heat exchanger according to claim 1, characterized in that the heat exchanger tubes are formed in a spiral shape.