JP2007093166A - Calcination furnace - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a calcination furnace wherein a temperature in the furnace can be accurately controlled while minimizing influences on calcinated objects. <P>SOLUTION: The calcination furnace 1 comprises a furnace body casing 10 in which calcinated objects are arranged to be calcinated in an atmosphere, a radiating plate 101 arranged outside the furnace body casing 10, a cooling pipe 20 arranged contacting with the radiating plate 101, and a chiller for admitting a refrigerant into the cooling pipe 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a firing furnace.

When atmosphere firing is performed in a firing furnace such as a continuous furnace or a batch furnace, it is necessary to appropriately control the furnace temperature. In particular, various problems existed when cooling the furnace atmosphere in order to lower the furnace temperature. Among them, on the premise that an inert gas is injected into the furnace, a firing furnace capable of reducing the amount of implantation has been proposed (for example, see Patent Document 1 below).
JP-A-10-300355

  By the way, in the baking furnace of the said patent document 1, since the inert gas was directly struck in the furnace, it affected the to-be-fired thing and the subject that the quality of the to-be-fired goods which baked the to-be-fired object is not stabilized There is.

  Therefore, an object of the present invention is to provide a firing furnace capable of accurately controlling the temperature in the furnace without affecting the material to be fired as much as possible.

  A firing furnace according to the present invention is a firing furnace in which an object to be fired is disposed in a furnace casing and fired in an atmosphere, and a heat sink is disposed outside the furnace casing and is placed in contact with the heat sink. It is characterized by comprising a refrigerant supply means for arranging a pipe and allowing the refrigerant to flow into the metal pipe.

  According to the present invention, since the heat sink is provided in the furnace casing and the metal pipe is disposed so as to contact the heat sink, the chemical effect is exerted on the atmosphere in the firing region defined by the furnace casing. Can be cooled without giving. Moreover, it is comprised from the heat sink and metal piping which were provided in the furnace casing, and since a refrigerant | coolant is poured into the metal piping and it cools, the furnace temperature can be accurately controlled with a simple structure.

  Moreover, in this invention, it is also preferable that metal piping is arrange | positioned so that attachment or detachment from a heat sink is possible. Since metal piping can be attached and detached, operations such as maintenance and expansion of metal piping can be performed more easily.

  In the present invention, the refrigerant is preferably water or antifreeze. Since the refrigerant is water or antifreeze, the inside of the furnace can be cooled more effectively.

  According to the present invention, it is possible to cool without giving chemical provision to the atmosphere in the firing region defined by the furnace casing. Therefore, it is possible to accurately control the furnace temperature without affecting the object to be fired as much as possible.

  The knowledge of the present invention can be easily understood by considering the following detailed description with reference to the accompanying drawings shown for illustration only. Subsequently, embodiments of the present invention will be described with reference to the accompanying drawings. Where possible, the same parts are denoted by the same reference numerals, and redundant description is omitted.

  The firing furnace of this embodiment will be described with reference to FIG. FIG. 1 is a diagram for explaining a configuration of a firing furnace 1 of the present embodiment. As shown to (a) of FIG. 1, the baking furnace 1 is comprised from the furnace body casing 10 and the cooling pipe 20 (metal piping). 1A shows a state in which the furnace casing 10 and the cooling pipe 20 are prepared, and FIG. 1B shows a state in which the cooling pipe 20 is attached to the radiator plate 101 of the furnace casing 10. ing.

  The furnace casing 10 is a box composed of refractory bricks, and members such as rollers and heaters (not shown) are appropriately attached.

  The furnace body casing 10 includes a pair of furnace walls 10a and 10b disposed at an inlet and an outlet in the longitudinal direction, a pair of furnace walls 10c and 10d facing each other in the left-right direction, and a pair facing each other in the up-down direction. It has furnace walls 10e and 10f. The furnace casing 10 defines a firing region in which the fired product is fired by the furnace walls 10a to 10f.

  A plurality of heat sinks 101 are arranged in a row on each of the pair of furnace walls 10c, 10d facing each other in the left-right direction. The plurality of heat sinks 101 are arranged in parallel to each other so as to extend in the vertical direction. Each heat radiating plate 101 is a straight plate-like metal plate extending in the vertical direction. Between each heat sink 101, the cooling pipe 20 is arrange | positioned so that each heat sink 101 may be contact | connected. The cooling pipe 20 is formed so as to meander and fold so as to pass between the heat radiating plates 101.

  The cooling pipe 20 is connected to a chiller (refrigerant supply means, not shown), and is formed so that the refrigerant supplied from the chiller circulates inside the chiller. In the case of this embodiment, water or antifreeze is used as the refrigerant. The cooling pipe 20 is made of copper.

  The cooling pipe 20 is detachably attached to the heat radiating plate 101. Therefore, the cooling pipe 20 can be easily removed and replaced or inspected.

  In addition, the arrangement of the cooling pipe 20 can be changed as appropriate depending on the cooling mode of the firing furnace 1. An example of the arrangement mode is shown in FIG. FIG. 2 shows a case where a cooling pipe 30 is further arranged in the firing furnace 1 shown in FIG. 2A shows a state where the firing furnace 1 and the cooling pipe 30 are prepared, and FIG. 2B shows a state where the cooling pipe 30 is attached to the firing furnace 1.

  The cooling pipe 30 is configured to have a length that is approximately half that of the cooling pipe 20 so as to be disposed between a part of the heat sinks 101 that are provided in a plurality. Therefore, only the portion where the cooling pipe 30 is disposed has the cooling pipe disposed double with the cooling pipe 20, and the cooling effect of only that portion can be locally enhanced.

  FIG. 3 is a diagram illustrating a state in which a cooling pipe 40 is disposed instead of the cooling pipe 20 illustrated in FIG. 1. Although the cooling pipes 20 are configured so as to enter between the heat sinks 101, the cooling pipes 40 are formed by widening the folding pitch so as to be arranged every other space in the space between the heat sinks 101. Has been. Even in such a case, since each cooling plate 40 is in contact with each heat sink 101 from one side, each heat sink 101 can be evenly cooled.

  In FIG. 4, the state which removed a part of heat-resistant brick which comprises the furnace body casing 10 is shown. As shown in FIG. 4, the heat sink 101 arranged on the furnace walls 10c and 10d is composed of a portion embedded inside the furnace walls 10c and 10d and a portion extending outside the furnace walls 10c and 10d. ing. Therefore, heat exchange between the furnace walls 10c, 10d and the cooling pipes 20 (30, 40) can be more effectively performed via the heat sink 101.

  In this embodiment, a circular copper pipe is used as the cooling pipe 20 (30, 40), but a square copper pipe may be used. When the cooling pipe is configured by a rectangular copper pipe, the area in contact with the heat radiating plate 101 becomes larger and the efficiency of heat exchange is improved.

  According to the present embodiment, the heat sink 101 is provided in the furnace casing 10 and the cooling pipe 20 is disposed so as to be in contact with the heat sink 101, so the atmosphere in the firing region defined by the furnace casing 10. It can be cooled without chemical effects. Moreover, since it is comprised from the heat sink 101 provided in the furnace body casing 10, and the cooling pipe 20, and makes it cool by flowing a refrigerant into the cooling pipe 20 from a chiller, it can control the furnace temperature accurately with a simple structure. Can do.

It is a figure which shows the structure of the baking furnace which is embodiment of this invention. It is a figure which shows the state which provided the cooling pipe further in the baking furnace shown in FIG. It is a figure which shows the modification of a cooling pipe. It is a figure which shows the attachment state of the heat sink of the baking furnace shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Firing furnace, 10 ... Furnace body casing, 20 ... Cooling pipe, 10a-10f ... Furnace wall, 101 ... Heat sink.

Claims (3)

A firing furnace in which an object to be fired is placed in a furnace casing and fired in an atmosphere,
A heat sink is arranged outside the furnace casing,
Arrange the metal piping so as to contact the heat sink,
A firing furnace comprising a coolant supply means for allowing a coolant to flow into the metal pipe. The firing furnace according to claim 1, wherein the metal pipe is disposed so as to be detachable from the heat radiating plate. The firing furnace according to claim 1 or 2, wherein the refrigerant is water or antifreeze.

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