JP2004196598A - Smoking apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate bad states, due to such as attached carbon or rust on the surface of a smoked ceramic product, easily brought about by the change in the external environment. <P>SOLUTION: The smoking apparatus has heating/warmth-keeping means 13, 14 used for heating/warmth-keeping feed pipes 2, 3 and installed around the feed pipes 2, 3, which feed a smoking gas, a diluted smoking gas, and their mixture to the inside of smoking boxes 1, 1a, or the like. The apparatus is used for smoking a base surface. In the apparatus, a fed gas at a low temperature is heated; a smoking gas is heated so as not to be thermally decomposed; and when the diluted gas is being heated, its temperature does not lower and it is heated until just before being fed into the boxes 1a or the like. Therefore, the inside temperature of the smoking boxes 1, 1a, or the like during the smoking treatment can be maintained in a temperature range suitable for smoking. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a smoker for smoking ceramic products having a carbon film formed on the surface, such as a smoker.
[0002]
[Prior art]
Conventionally, in the above-described smoking apparatus, after the green body molded, dried and fired into a predetermined shape is accommodated in a smoking box, the inside of the smoking box is sealed and the air is shut off in a state where the air is shut off. While the inside of the smoking box is kept in the optimum temperature range while burning the gas to about 900 to 1000 degrees, an inert gas such as CO ₂ , N _2, etc. (in the specification of the present application) , Diluted gas) and supplied into a smoking box for a predetermined time to perform a smoking treatment, form a carbonaceous film on the surface of the substrate under a reducing atmosphere, and then oxidize the carbonaceous film. By cooling while maintaining the sealed state while supplying the above-mentioned diluent gas to a temperature (about 450 ° C.), a smoked ceramic product having a silvery carbonaceous film formed on the surface is obtained (for example, see Patent Document 1). ).
During the above process, if the substrate is smoked at a high temperature for a predetermined time or more, "adhered carbon" which cannot be removed even with a brush is generated on a part of the substrate surface, and the iron in the substrate sufficiently oxidizes during the firing process. If the remaining iron or oxidized iron is reduced in a reducing atmosphere and the iron comes into contact with moisture, brown spot-like “rust” is generated on the surface. As a measure to prevent the generation of deposited carbon, the smoked gas is diluted with a diluting gas during the smoke treatment, and the rust is prevented by completely oxidizing the iron in the base material during firing and smoking. The reduction reaction of iron oxide must be suppressed by diluting the smoked gas with the diluent gas during the treatment (for example, see Non-Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2000-203927 (page 2)
[Non-patent document 1]
Minoru Tanaka, “Clay Roof Handbook”, Bupodo Publishing Co., Ltd., November 25, 1980, p328-331, p341-353, p355-357
[0004]
[Problems to be solved by the invention]
However, the smoked gas is mainly filled as a liquefied gas in a cylinder outside the factory, and after being vaporized by a vaporizer, is sent to the inside of the factory through the outside of the factory of the feed pipe, while the diluted gas is N ₂ and taken out from the atmosphere with N ₂ generator, a CO ₂ filled as a gas into the cylinder, from sending to the factory interior side through plant extracellular portion of feed pipes if necessary, in particular a winter For example, the temperature inside the smoking box during the smoking process varies greatly depending on the season, such as the temperature of the smoked gas and dilution gas dropping during the feeding process. If the smoking process is performed, the time required for smoking will be too short or too long, resulting in a product with "adhered carbon" or a product that tends to generate "rust". There was a task that had to be done.
[0005]
[Means for Solving the Problems]
The present invention is based on the above-described conventional technology, and in view of the problem that defects such as carbon and rust are easily generated on the surface of a smoked ceramic product due to a change in the external environment, a smoked gas, a diluted gas of the smoked gas, and a mixture of both The supply gas in a low temperature state is heated by subjecting the base material to a smoking process provided with a heating and heat retaining means for the supply pipe on the outside of the supply pipe for feeding the mixed gas into the smoking box. The smoked gas is heated to the extent that it does not thermally decompose, and if the diluted gas is heated, its temperature is prevented from dropping, and the heating and heat keeping should be performed just before it is supplied to the smoked box. Thus, the above-mentioned problem is solved by making it possible to maintain the temperature in the smoking box during the smoking process in a temperature zone suitable for smoking.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic front view of a smoking apparatus according to the present invention, and FIG. 2 is a cross-sectional view of a heating / insulating means, in which a plurality of smoking boxes 1, 1a,. , 5a,... From the supply pipes 2, 3 are joined together and connected to the smoking boxes 1, 1a,. On the other hand, the downstream side of the supply pipes 2 and 3 is connected to the supply sections 6 and 7 for the smoked gas and the diluted gas of the smoked gas, and the smoked gas and the diluted gas of the smoked gas are supplied to the supply pipe 2 and 3 and the branch pipes 4, 4a ... 5, 5a ... can be supplied into the smoker boxes 1, 1a ..., and when both gases are supplied at the same time, both are mixed. .
, 9, 9a, etc. are provided downstream of the branch pipes 4, 4a, 5, 5a, so that the supply amounts of the smoked gas and the dilution gas can be adjusted.
The supply section 6 for the smoked gas fills the cylinder 10 with the liquefied gas of the smoked gas, and a vaporizer 11 is provided at the outlet of the supply section 6, while the supply section 7 for the diluted gas is provided in the atmosphere. or a N ₂ generator retrieve the N ₂ from the cylinder filled with gaseous CO _2, is provided with a heater 12 dilution gas on the upstream side of the dilution gas feed pipe 3.
[0007]
A plurality of pipes 15, 15a..., 16, through which high-temperature steam is passed outside the feed pipes 2 and 3 as heating and keeping means 13 and 14 for the smoked gas and the diluted gas in the feed pipes 2 and 3 16a are arranged so as to extend from the upstream side of the feed pipes 2 and 3 to the most downstream side, and the upstream sides of the pipes 15, 15a ..., 16, 16a ... are connected to the same boiler 17 and , 16, 16a... Are passed through the pipes 15, 15a..., 16, 16a. The pipes 15, 15a ..., 16, 16a ... are arranged substantially parallel to the feed pipes 2, 3 or in a meandering or spiral manner.
As shown in FIG. 2, heat insulating materials 18, 19 are provided outside the feed pipes 2, 3 in which the pipes 15, 15a..., 16, 16a.
[0008]
In the above embodiment, two feed pipes 2 and 3 are provided. However, the present invention is not limited to this. For example, although not shown, a smoked gas feed pipe and a diluted gas feed pipe are provided. The pipe is joined to the mixed gas supply pipe via the mixer, the branch pipe from the mixed gas supply pipe is connected to the smoking box 1, 1a,..., And the heating / heating means is arranged in the mixed gas supply pipe. In other words, the outer peripheral portion of a supply pipe for supplying gas into the smoking box, such as a smoked gas, a diluted gas of the smoked gas, and a mixed gas of both, connected to a smoked box containing the base material, It is sufficient that a heating and heat retaining means is provided along the feed pipe, and the heating and heat retaining means can heat and keep the supplied gas to just before the supply into the smoking box.
In the above-mentioned embodiment, the heating and heat retaining means 13 and 14 use high-temperature steam. Although not shown, a liquid heat medium is passed through the pipes 15, 15a..., 16, 16a. Alternatively, an electric heater such as a sheath heater disposed along the feed pipes 2 and 3 may be used.
[0009]
Next, the operation of the smoking apparatus according to the present invention will be described.
In the same manner as in the prior art, the green body molded, dried and fired into a predetermined shape is accommodated in the smoking boxes 1, 1a..., And the air is shut off in the smoking boxes 1, 1a. while burning to approximately 900-1000 degrees while maintaining the optimum temperature range the Ibushika box 1, 1a ... within, propane, Ibushika gas such as butane, diluted with dilution gas such as CO _2, N ₂ Are supplied into the smoking boxes 1, 1a for a predetermined period of time to perform a smoking process, to form a carbonaceous film on the surface of the substrate under a reducing atmosphere, and then to a temperature at which the carbonaceous film is not oxidized (about 450 ° C). By cooling while maintaining the sealed state while supplying the above-mentioned dilution gas, the product becomes a smoked ceramics product having a silvery carbonaceous film formed on the surface. , 14, high temperature steam through pipes 15, 15a ..., 16, 16a ... Then, the temperature of the diluted gas heated by the heater 12 does not decrease, and the temperature of the diluted gas in the low-temperature state is increased by heating to such an extent that it does not thermally decompose, and then the diluted gas and the smoked gas are combined, mixed and smoked. Supply in boxes 1, 1a ...
The above-mentioned smoking process is performed simultaneously in all the smoking boxes 1, 1a,..., Or one by one or an arbitrary number. Actually, the flow rate adjusting units 8, 8a,. The opening and closing operations of the branch pipes 4, 4a,.
[0010]
【The invention's effect】
In short, the present invention relates to the supply of gas to the inside of the smoking boxes 1, 1a, etc., connected to the smoking boxes 1, 1a,. Are provided outside the supply pipes 2 and 3 for heating and warming the supply pipes 2 and 3 so that if the supply gas passing through the supply pipes 2 and 3 is in a low temperature state, The heating and heating means 13 and 14 can be heated to raise the temperature, and the heated supply gas can be maintained at the same temperature by the heating and keeping means 13 and 14, and the heating and keeping the heat is a smoking box. 1, 1a ..., just before the supply to the inside, the temperature change of the supply gas due to the change of the external environment can be kept extremely small, so the internal temperature of the smoking box 1, 1a ... , Can be maintained in the temperature range suitable for smoking, so always quality Is large, such as very its practical effect can be produced ceramic products fumigation of high-quality unchanging.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a smoking apparatus according to the present invention.
FIG. 2 is a cross-sectional view of a heating / heating means.
[Explanation of symbols]
1, 1a ... Smoked box 2, 3 Feeding pipe
13, 14 Heating / warming means

Claims (1)

Outside the supply pipe of the supply gas into the smoking box, such as the smoked gas, the dilution gas of the smoked gas and the mixed gas of both, connected to the smoked box containing the substrate, A smoker comprising a heating and heat retaining means.

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