Gas firing furnace

Abstract

The utility model provides a gas firing furnace (1), which is provided with a gas supply path (2) for supplying combustion gas into the furnace, a gas discharge path (3) for discharging the gas in the furnace as exhaust gas, and a combustor (6) arranged on the gas supply path and used for combusting the combustion gas, and the gas firing furnace (1) is provided with a heat exchange device (4), the heat exchange device (4) is provided on the upstream side of the gas supply path (2) with respect to the burner (6), and exchanges heat between the exhaust gas and the combustion gas. According to the gas firing furnace, the heat exchange device which is arranged on the upstream side of the gas supply path relative to the combustor for combusting the combustion gas and performs heat exchange between the exhaust gas and the combustion gas is arranged, so that the energy efficiency of the gas firing furnace can be greatly improved.

Description

Technical Field

[0001] The utility model relates to a gas sintering furnace. Background Art

[0002] Conventionally, when sanitary ceramics such as wash basins, toilets, and bathtubs are processed using a firing furnace, combustion gas is supplied into the firing furnace. In such a firing furnace, since the combustion gas at room temperature is supplied into the firing furnace, a large amount of heat is required to raise the temperature in the furnace and maintain it at a high temperature. Utility Model Content

[0003] Technical problems to be solved by utility models

[0004] Therefore, an object of the present invention is to provide a gas sintering furnace capable of improving energy efficiency.

[0005] Technical solutions for solving technical problems

[0006] In order to solve the above technical problems, the first solution of the utility model is a gas sintering furnace (1), characterized in that:

[0007] A furnace is provided with a gas supply path (2) for supplying combustion gas into the furnace, a gas exhaust path (3) for exhausting the gas in the furnace as exhaust gas, and a burner (6) provided in the gas supply path and burning the combustion gas.

[0008] The gas calcining furnace (1) includes a heat exchange device (4) which is provided on the upstream side of the gas supply path (2) relative to the burner (6) and performs heat exchange between the exhaust gas and the combustion gas.

[0009] In addition, a second aspect of the present invention is the gas sintering furnace according to the first aspect, characterized in that:

[0010] The gas sintering furnace is a continuous gas sintering furnace including a heating area (11), a heat-averaging area (12) and a cooling area (13).

[0011] In addition, a third aspect of the present invention is the gas sintering furnace according to the second aspect, characterized in that:

[0012] The gas supply path (2) is provided in the heating area (11) and / or the uniform heating area (12).

[0013] The gas exhaust path (3) is provided in the cooling area (13).

[0014] In addition, a fourth aspect of the present invention is the gas sintering furnace according to the third aspect, characterized in that:

[0015] The gas exhaust passage is arranged within 40% of the upstream side of the cooling area (13).

[0016] In addition, a fifth aspect of the present invention is the gas sintering furnace according to the fourth aspect, characterized in that:

[0017] The temperature of the combustion gas at the outlet of the heat exchange device (4) is 130°C or higher.

[0018] In addition, a sixth aspect of the present invention is a gas sintering furnace according to any one of the first to fifth aspects, characterized in that:

[0019] The gas supply path (2) includes a filter (5).

[0020] In addition, a seventh aspect of the present invention is a gas sintering furnace (1) according to any one of the first to fifth aspects, characterized in that:

[0021] The gas firing furnace (1) is a continuous gas firing furnace for sanitary ceramics.

[0022] Effect of utility model

[0023] According to the present invention, the heat exchange device for performing heat exchange between the exhaust gas and the combustion gas is provided on the upstream side of the gas supply path relative to the burner for burning the combustion gas, so that the energy efficiency of the gas burning furnace can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the gas calcining furnace which concerns on embodiment of this invention. DETAILED DESCRIPTION

[0025] Hereinafter, the gas firing furnace 1 according to the embodiment of the present invention will be described by taking a continuous gas firing furnace for sanitary ceramics as an example. The gas firing furnace 1 includes a gas supply path 2 for supplying combustion gas into the furnace, a gas exhaust path 3 for exhausting the gas in the furnace as exhaust gas, and a burner 6 provided in the gas supply path 2 to burn the combustion gas. In addition, the gas firing furnace 1 includes a heat exchange device 4, which is provided on the upstream side of the gas supply path 2 relative to the burner 6 and performs heat exchange between the exhaust gas and the combustion gas. As the heat exchange device, a well-known heat exchange device can be used.

[0026] In addition, the gas firing furnace 1 of the present embodiment includes a filter 5 in the gas supply path 2. When foreign matter is contained in the combustion gas, there is a possibility that the foreign matter adheres to the sanitary earthenware being heated and damages the appearance of the fired sanitary earthenware, resulting in defective products. However, by providing the filter 5 in the gas supply path 2, the generation of such defective products can be prevented.

[0027] The gas sintering furnace 1 of the present embodiment includes a heating zone 11 , a uniform heating zone 12 , and a cooling zone 13 .

[0028] In the gas calcining furnace 1 of the present embodiment, the gas supply path 2 is provided in the heating area 11 and the uniform heating area 12 , and the gas exhaust path 3 is provided in the cooling area 13 .

[0029] The gas supply path 2 includes a gas supply path 21 disposed on the upstream side of the heat exchange device 4, a gas supply path 22 disposed between the heat exchange device 4 and the filter 5, a gas supply path 23 disposed on the downstream side of the filter 5 as a main pipe, and a plurality of gas supply paths 24 branching from the main pipe as branch pipes. The burner 6 is provided in the gas supply path 24 as the branch pipe, and the combustion gas is introduced into the heating area 11 and the uniform heating area 12 after being burned in the burner.

[0030] The gas exhaust path 3 includes a plurality of gas exhaust paths 31 forming branch pipes connected to the cooling area 13 , a gas exhaust path 32 forming a main pipe arranged on the upstream side of the heat exchange device 4 and merging with the plurality of branch pipes, and a gas exhaust path 33 arranged on the downstream side of the heat exchange device 4 .

[0031] The gas exhaust path 3 is connected to fans 91 and 92, and exhaust gas is exhausted to the outside of the gas calcining furnace 1 by driving the fans 91 and 92. The gas supply path 2 and the gas exhaust path 3 can be made of well-known materials, such as SUS316L and SUS310S.

[0032] Here, it is preferred that the gas exhaust path 3 is provided within 40% of the upstream side of the cooling area 13. In the case of a gas firing furnace for sanitary ceramics, if the gas exhaust path 3 is provided at a position downstream of the above range, the temperature of the exhaust gas introduced into the heat exchange device 4 becomes low, which is not desirable in terms of improving energy efficiency.

[0033] In addition, the temperature of the combustion gas at the outlet of the heat exchange device 4 is preferably not less than 130° C. If the temperature of the combustion gas is less than 130° C., it is not preferable in terms of improving the energy efficiency.

[0034] The combustion gas supplied to the gas calcining furnace 1 is introduced into the heat exchange device 4 through the gas supply path 21, and the temperature is increased in the heat exchange device 4. Then, it passes through the gas supply path 22 and the filter 5, and foreign matter is removed by the filter 5. Then, the combustion gas after burning in the burner provided in the gas supply path 24 through the gas supply path 23 and the gas supply path 24 is introduced into the heating area 11 and the uniform heating area 12. The gas in the furnace is introduced into the heat exchange device 4 through the gas exhaust paths 31 and 32, and heat exchange is performed between the exhaust gas and the combustion gas in the heat exchange device 4. Thereafter, the exhaust gas is discharged to the outside of the system of the gas calcining furnace 1 through the gas exhaust path 33.

[0035] According to the gas calcining furnace 1 of this embodiment, the heat exchange device 4 is provided on the upstream side of the gas supply path 2 relative to the burner 6 for burning the combustion gas, and performs heat exchange between the exhaust gas and the combustion gas, thereby greatly improving the energy efficiency of the gas calcining furnace 1.

[0036] Explanation of symbols

[0037] 1: Gas sintering furnace

[0038] 2: Gas supply path

[0039] 3: Gas exhaust path

[0040] 4: Heat exchange device

[0041] 5: Filter

[0042] 6: Burner

[0043] 11: Heating area

[0044] 12: Heat distribution area

[0045] 13: Cooling area.

Claims

1. A gas sintering furnace (1), characterized in that: A furnace is provided with a gas supply path (2) for supplying combustion gas into the furnace, a gas exhaust path (3) for exhausting the gas in the furnace as exhaust gas, and a burner (6) provided in the gas supply path and burning the combustion gas. The gas calcining furnace (1) includes a heat exchange device (4) which is provided on the upstream side of the gas supply path (2) relative to the burner (6) and performs heat exchange between the exhaust gas and the combustion gas.

2. The gas sintering furnace according to claim 1, characterized in that: The gas sintering furnace (1) is a continuous gas sintering furnace including a heating area (11), a uniform heating area (12) and a cooling area (13).

3. The gas sintering furnace according to claim 2, characterized in that: The gas supply path (2) is provided in the heating area (11) and / or the uniform heating area (12). The gas exhaust path (3) is provided in the cooling area (13).

4. The gas sintering furnace according to claim 3, characterized in that: The gas exhaust passage is arranged within 40% of the upstream side of the cooling area (13).

5. The gas sintering furnace according to claim 4, characterized in that: The temperature of the combustion gas at the outlet of the heat exchange device (4) is 130°C or higher.

6. The gas sintering furnace according to any one of claims 1 to 5, characterized in that: The gas supply path (2) includes a filter (5).

7. The gas sintering furnace according to any one of claims 1 to 5, characterized in that: The gas firing furnace is a continuous gas firing furnace for sanitary ceramics.

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