CN-121986075-A - Method for producing glass product and glass melting furnace

Abstract

A method for producing a glass product comprises a melting step of heating a molten glass raw material (Gr) by a heating device (4) to produce molten glass (Gm). A burner (6) of a heating device (4) has a fuel gas injection port (11 aa) for injecting a fuel gas (d) containing at least one of hydrogen gas (a) and hydrocarbon gas (b), and a combustion-supporting gas injection port (12 aa) for injecting a combustion-supporting gas (c). The flow rate V1/V2 of the fuel gas (d) in the fuel gas injection port (11 aa) is set to V1 m/s, the flow rate V2 m/s of the combustion-supporting gas (c) in the combustion-supporting gas injection port (12 aa) is set to V2 m/s, and the ratio of the heating value (W) of the hydrocarbon gas (b) to the total heating value (W) of the fuel gas (d) is set to p (p is 0-1), wherein the flow rate ratio V1/V2 satisfies the relation of 8-6p < V1/V2 < 24-18 p.

Inventors

• Ban jinyuzhi
• FUJIWARA MASAYOSHI

Assignees

• 日本电气硝子株式会社

Dates

Publication Date

20260505

Application Date

20240927

Priority Date

20231013

Claims (7)

1. 1. A method for producing a glass product, characterized by comprising a melting step of melting a glass raw material by heating with a heating device to produce molten glass, The heating device has: a burner for forming a flame; a hydrogen supply device for supplying hydrogen to the burner; A hydrocarbon gas supply device for supplying hydrocarbon gas to the burner, and A combustion-supporting gas supply device for supplying a combustion-supporting gas to the burner, The burner has: A fuel gas injection port for injecting a fuel gas containing at least one of the hydrogen gas and the hydrocarbon gas, and A combustion-supporting gas injection port for injecting the combustion-supporting gas, When the flow rate of the fuel gas in the fuel gas injection port is set to be V1, the flow rate of the combustion-supporting gas in the combustion-supporting gas injection port is set to be V2, and the ratio V1/V2 satisfies the following relationship, where the ratio of the amount of heat generation of the hydrocarbon gas to the total amount of heat generation of the fuel gas is set to be p: 8-6p≤V1/V2≤24-18p, The flow rates V1 and V2 are in m/s, and the heating value and the total heating value are in W.
2. 2. The method for producing a glass product according to claim 1, wherein, when the cross-sectional area of the fuel gas injection port is S1 and the cross-sectional area of the combustion-supporting gas injection port is S2, The cross-sectional area ratio S2/S1 is 4 to 12.
3. 3. The manufacturing method of a glass article according to claim 1 or 2, wherein the fuel gas injection port is flat in shape.
4. 4. The method of manufacturing a glass article according to claim 1 or 2, wherein the combustion-supporting gas injection port surrounds the fuel gas injection port.
5. 5. The method for producing a glass article according to claim 1 or 2, wherein the combustion-supporting gas is oxygen.
6. 6. The method of manufacturing a glass article according to claim 1 or 2, wherein the hydrocarbon gas is natural gas.
7. 7. A glass melting furnace for producing molten glass by heating and melting a glass raw material using a heating device, wherein, The heating device has: a burner for forming a flame; a hydrogen supply device for supplying hydrogen to the burner; A hydrocarbon gas supply device for supplying hydrocarbon gas to the burner, and A combustion-supporting gas supply device for supplying a combustion-supporting gas to the burner, The burner has: A fuel gas injection port for injecting a fuel gas containing at least one of the hydrogen gas and the hydrocarbon gas, and A combustion-supporting gas injection port for injecting the combustion-supporting gas, When the cross-sectional area of the fuel gas injection port is set to S1 and the cross-sectional area of the combustion-supporting gas injection port is set to S2, The cross-sectional area ratio S2/S1 is 4 to 12.

Description

Method for producing glass product and glass melting furnace Technical Field The present invention relates to a method for producing a glass product and a glass melting furnace. Background The glass product manufacturing process includes a melting process of heating and melting a glass raw material in a melting furnace. In the melting step, a method of heating a molten glass raw material in a melting furnace using a burner for forming a flame by burning a fuel gas is widely used (for example, patent document 1). As the fuel gas, a hydrocarbon gas such as natural gas is generally used. Prior art literature Patent literature Patent document 1 International publication No. 2011/136086 Disclosure of Invention Problems to be solved by the invention If a hydrocarbon gas is used as the fuel gas supplied to the burner, CO 2 contained in the exhaust gas generated in the melting step increases. As a result, there is a problem that the environmental load increases. Therefore, in order to reduce CO 2 contained in the exhaust gas, it is required to reduce the amount of hydrocarbon gas used. Therefore, it is considered to replace part or all of the hydrocarbon gas with hydrogen gas as the fuel gas supplied to the burner. In this way, CO 2 contained in the exhaust gas can be reduced. However, in this case, the range of flame formation in the burner may vary greatly depending on the mixing ratio of the hydrocarbon gas and the hydrogen gas in the fuel gas. When the flame formation range is too small, then, in the melting step, there is a problem that the glass raw material cannot be heated efficiently. The present invention aims to reduce CO 2 contained in exhaust gas generated in a melting process, and to efficiently heat and melt a glass raw material by forming a flame having a wide range by a burner. Means for solving the problems (1) The present invention is a method for producing a glass product, comprising a melting step of producing a molten glass by heating a glass raw material using a heating device, wherein the heating device comprises a burner for forming a flame, a hydrogen gas supply device for supplying hydrogen gas to the burner, a hydrocarbon gas supply device for supplying a hydrocarbon gas to the burner, a combustion-supporting gas supply device for supplying a combustion-supporting gas to the burner, the burner comprises a fuel gas injection port for injecting a fuel gas containing at least one of hydrogen gas and a hydrocarbon gas, a combustion-supporting gas injection port for injecting a combustion-supporting gas, the flow rate of the fuel gas injected by the fuel gas injection port is V1 m/s, the flow rate of the combustion-supporting gas injected by the combustion-supporting gas injection port is V2 m/s, and the flow rate ratio V1/V2 satisfies the relation of 8-6p < V1/V2 < 24-18p when the ratio of the heating value [ W ] of the hydrocarbon gas to the total heating value [ W ] of the fuel gas is p. In this way, the fuel gas can be reacted with the combustion-supporting gas in a wide range and with high efficiency, and the fuel gas can be burned in a wide range, regardless of whether the fuel gas contains only hydrogen gas or only hydrocarbon gas, or both hydrogen gas and hydrocarbon gas. As a result, CO 2 contained in the exhaust gas generated in the melting step can be reduced, and a flame having a wide range can be formed by the burner. (2) In the above configuration (1), when the cross-sectional area of the fuel gas injection port is S1 and the cross-sectional area of the combustion-supporting gas injection port is S2, the cross-sectional area ratio S2/S1 is preferably 4 to 12. If so, the flow rate ratio V1/V2 is easily adjusted so as to satisfy the relationship of 8-6p < V1/V2 < 24-18 p. (3) In the above configuration of (1) or (2), the fuel gas injection port is preferably flat. In this way, the fuel gas spreads in a planar manner, and thus a flame having a wide range is easily formed by the burner. (4) In any one of the above (1) to (3), the combustion-supporting gas injection port preferably surrounds the fuel gas injection port. In this way, the combustion-supporting gas is formed around the fuel gas injected from the fuel gas injection port, and the combustion-supporting gas is injected from the combustion-supporting gas injection port. Thus, the fuel gas reacts with the combustion supporting gas over a wide range in the furnace to burn the fuel gas. As a result, flames spread over a wide range in the furnace are easily formed. (5) In any one of the above (1) to (4), the combustion-supporting gas is preferably oxygen. In this way, compared with the case of using air as the combustion supporting gas, the introduction of the gas (for example, nitrogen) which does not contribute to combustion into the melting furnace can be reduced, and the thermal efficiency can be improved. (6) In any one of the above (1) to (5), the hydrocarbon gas is preferably natural gas. If natural gas is used in this wa