JPS58193015A - Device for recovering heat - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ceramic cross-flow heat recovery device. Such heat recovery devices are generally described in U.S. Pat.
&517, No. 4.084400, 160 to No. 415
No. 4,262.740, No. 4,279.297 and No. 4.5Or1.627. , to conserve energy by transferring waste heat from the exhaust gas to the combustion air used to burn the fuel.

The present invention is intended not only to utilize the waste heat of such exhaust gases, but also to purify the harmful or polluting components of the waste heat. When the raw material is fossilized salmonids such as coal, petroleum, and natural gas, pollutants such as - oxidized legs, nitrogen oxides, and swollen hydrogen are generated.

Additionally, if the fuel is wood, additional undesirable components including creosote may be generated.

Briefly, the present invention provides a housing having a first port and a first outlet for hot exhaust gas and a second port and outlet for combustion gas such as air to be heated; a first set of parallel passages for passing the high-temperature exhaust gas; and a first set of parallel passages disposed in a mutual heat transfer relationship with the first set of passages; A heat exchanger manufactured by Fumic with a cross-flow grip having a second set of parallel passages for the passage of gas,
are arranged in the ceramic walls of each passage of the first set to convert the harmful components of the exhaust gas into relatively harmless substances or to completely oxidize the contaminant, e.g. Provided is a heat recovery device comprising a catalyst capable of converting heat to water vapor or both of the above conversions. An example of such a catalyst is U.S. Pat. No. 2,071. M
9, 4656.915, 5,755.204 and 4894048.

The above and other objects, features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

Referring to FIG. 1, there is shown a cubic cedar ceramic heat exchanger core 1 according to one embodiment of the present invention. The core 1 has a first artificial surface 2 in which a first set of passages 4 are open, and a second artificial surface 2.
．． &l passageway 5 has a second artificial face 3 with two ends. Passages 4 and 5 pass through core 1 in alternating layers and in orthogonal relation to each other, as partially shown in FIG. The first artificial plane 2 is an artificial plane for hot exhaust gas passing through the passage 4. The ceramic walls of each passageway 4 are coated with a catalytic coating which converts the pollution in the exhaust gas into harmless @. The second artificial plane 5 is an artificial plane for the combustion air used to combust the fuel in the burner (not shown). For such a burner,
A heat recovery device 16 (FIG. 2) consisting of the core 1 of the present invention is connected. The combustion air passes through passage 5 and is heated by heat transferred from the hot exhaust gas passing within passage 4 .

As shown in FIG. 112, the heat fighting equipment wt6 consists of a housing 7 and a core 1 disposed within the housing. The housing 7 has a first port 8 and a first outlet 9 for hot exhaust gases from a burner (not shown). Arrow 10 indicates the flow direction of the hot exhaust gas flowing from the burner through the heat-fighting containment wt6.

The housing 7 also has a second port 11 and a second outlet 12 for the combustion air used to combust the fuel in the burner.

Arrow 13 indicates the direction of flow of combustion air through heat recovery device 116. The heated combustion air from outlet 12 is
guided to the burner.

One example of a catalyst that can be used in accordance with the present invention includes platinum, platinum group metals, platinum metal compounds, or platinum compounds. Platinum can be deposited on the walls of the passageways 4 by well-known techniques, for example by pouring a platinum solution, such as an aqueous solution of platinum tetrachloride, into the passageways 4 and draining off the excess liquid and allowing it to dry. The platinum tetrachloride can then be reduced to metal in a reducing PIN atmosphere. Alternatively, the platinum, platinum group metal or platinum compound can be deposited in the form of a dispersion.

In that case, the platinum compound is converted into metal particles or a cosidic liquid, which liquid is coated on the ceramic wall of the channel 4 or on the washcoat previously applied to the ceramic wall.

If desired, to increase the 'IkJ product of the platinum contact surface, for example about 50-5 sos
A washcoat of a particulate material such as alumina (corresponding to a particle size of approximately α1 to α005P) having a surface type of 0.05 to 0.005 can be coated.

For diluted alumina IIjl like this! l! is obtained by applying an aqueous suspension containing, for example, 1% hydrochloric acid, 10% alumina, and i% binder of, for example, vinyl alcohol or ethyl cellulose to a thickness of about 10 to 20p. . After drying this, the alumina coating is sintered at, for example, 600°C. Typical catalysts contain about 1 to 5 weight Ik% platinum, based on heavy coating overlay.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the ceramic core of the present invention, and FIG. 2 is a cross-sectional view showing the wing γ accommodated in the housing. 1: Ceramic heat exchanger core 4: First set of passages 5: Second set of passages 7: Housing 8: First population 9: First outlet 11: Second population 12: @2 outlet

Claims (1)

Claims: 1) a housing having a first port and a first outlet for hot exhaust gas and a second port and second outlet for combustion gas to be heated; The first set of passages for passing the combustion exhaust gas and the first set of IMi passages are arranged in a heat transfer relationship with each other, and are arranged in a heat transfer relationship with respect to the first set of passages for passing the combustion gas. a cross-flow ceramic heat exchanger core having a second set of passage numbers for causing the flow of the ceramic sea bream in each passage of the first set;
2) the first set of passages comprises a heat recovery catalyst disposed in the exhaust gas and a catalyst capable of displacing harmful or polluting components or both components of the exhaust gas; #! Two sets of jIIf! A heat recovery device Wl according to claim 1#A, which intersects with the invention. s) The heat recovery device according to claim 1, wherein the catalyst # is adhered to the ceramic wall as a washcoat. 4) A heat recovery device according to claim 5, wherein the wall made of #kisefinoi is initially coated with a particulate material having a particle size of less than about α1μ. 5) Claim 4 in which the granular material # is alumina.
Heat recovery device as described in section.