Kiln oxygenation preheating device for automobile glass sheet production

Abstract

The utility model discloses a kiln oxygenation preheating device for automobile glass sheet production, which comprises a kiln body, a bubbler is arranged on the kiln body, the bubbler comprises an air supply pipe, at least two preheating pipes, an air distribution pipe and an air outlet pipe, the air supply pipe is vertically arranged in the kiln body, the at least two preheating pipes are communicated with the air inlet end of the air supply pipe, and the air distribution pipe is communicated with the air outlet pipe. The preheating pipe is installed in an inner top flue of the kiln body, at least one gas distribution pipe is communicated with the gas outlet end of the gas supply pipe, and the gas outlet pipes are evenly installed on the gas distribution pipe. The oxygen-increasing preheating device for the kiln can preheat the combustion-supporting gas by utilizing redundant heat in the flue gas in the kiln, and the preheated combustion-supporting gas can not or hardly absorb the heat in the kiln, so that on one hand, the temperature in the kiln is stabilized, the heat obtained by a batch is ensured as much as possible, and the yield and the quality of products are improved; flue gas is used for preheating, energy is saved, and consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of glass kilns, in particular to a kiln oxygen-enhancing preheating device for producing automobile glass raw sheets. Background Art

[0002] The quality requirements for the original glass of automotive glass are much higher than those of ordinary glass. The higher quality determines its high price. The price of high-end automotive glass is about three times that of ordinary glass, and the cost is about twice that of ordinary glass. Therefore, regarding the automotive glass production line, due to the quality and thickness requirements, the pulling capacity of the melting furnace is usually not high. Because of the high quality and high requirements, the scrap rate of automotive glass is also quite high. The scrap rate is mainly controlled by various factors in the kiln, such as temperature and tin bath, especially temperature. How to stabilize the temperature in the kiln is related to product quality and output.

[0003] At present, the heat required for heating the melting furnace is mainly provided by the combustion of natural gas and oxygen at high temperature. Since the main component of natural gas is methane, when 1m3 of natural gas is consumed, the combustion gas enters the kiln and rises by 1 degree, oxygen absorbs 2.6 KJ of heat, and air absorbs 12.9 KJ of heat. At the same time, the high-temperature flue gas in the kiln has a strong convection heat transfer capacity. Therefore, in order to reduce the heat obtained by oxygen (or air), and then increase the heat obtained by melting the batch material, the batch material melting speed is accelerated, the temperature is stabilized, and energy saving is the key to improving the yield of automotive glass. Utility Model Content

[0004] The utility model aims to provide an oxygen-enhancing preheating device for a kiln used for producing automobile glass raw sheets, so as to solve the problem of reducing the heat obtained by the combustion-supporting gas in the kiln and thus increasing the heat obtained by melting the batch materials.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A kiln oxygen preheating device for producing automobile glass raw sheets comprises a kiln body, on which a bubbler is arranged, the bubbler comprises an air supply pipe, a preheating pipe, an air distribution pipe and an air outlet pipe, the air supply pipe is vertically installed in the kiln body, at least two of the preheating pipes are connected to the air inlet end of the air supply pipe, and the preheating pipe is installed in the inner top flue of the kiln body, at least one of the air distribution pipes is connected to the air outlet end of the air supply pipe, and the air outlet pipes are evenly installed on the air distribution pipes.

[0007] A further technical solution is that an electric heating jacket is provided on the preheating tube.

[0008] A further technical solution is: the preheating tube is an S-shaped tube.

[0009] A further technical solution is: the top of the air supply pipe is located outside the kiln body, and a pressure gauge and a temperature gauge are installed on the top of the air supply pipe.

[0010] A further technical solution is: the air distribution pipe is composed of a straight pipe and a plurality of annular pipes with different diameters, and the plurality of annular pipes are concentrically arranged and connected to each other through the straight pipe.

[0011] A further technical solution is: a constriction is provided at the bottom of the air outlet pipe, a high temperature resistant buoyancy ball is provided in the constriction, and the high temperature resistant buoyancy ball is connected to the inner wall of the air outlet pipe through a high temperature resistant soft chain.

[0012] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0013] The utility model provides a kiln oxygen preheating device for producing automobile glass raw sheets. The kiln oxygen preheating device can utilize the excess heat in the flue gas in the kiln to preheat the combustion-supporting gas. The preheated combustion-supporting gas will not or will rarely absorb the heat in the kiln. Firstly, the temperature in the kiln is stabilized, the heat obtained by the batch materials is guaranteed as much as possible, and the yield and quality of the products are improved; secondly, the flue gas is utilized for preheating to save energy and reduce consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a structural schematic diagram of a kiln oxygen-enriching preheating device for producing automobile glass raw sheets.

[0015] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the preheating tube.

[0016] Figure 3 For this utility model Figure 1 Schematic diagram of the structure of the Zhongbu trachea.

[0017] Figure 4 For this utility model Figure 1 Schematic diagram of the structure of the middle outlet pipe.

[0018] Figure numerals: 1. kiln body; 2. bubbler; 3. air supply pipe; 4. preheating pipe; 5. air distribution pipe; 51. straight pipe; 52. ring pipe; 6. air outlet pipe; 7. electric heating jacket; 8. pressure gauge; 9. temperature gauge; 10. pass; 11. high temperature resistant buoyancy ball; 12. high temperature resistant soft chain. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0025] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a kiln oxygen preheating device for producing automobile glass raw sheets includes a kiln body 1, on which a bubbler 2 is arranged, and the bubbler 2 includes an air supply pipe 3, a preheating pipe 4, an air distribution pipe 5 and an air outlet pipe 6. The air supply pipe 3 is vertically installed in the kiln body 1, at least two preheating pipes 4 are connected to the air inlet end of the air supply pipe 3, and the preheating pipe 4 is installed in the inner top flue of the kiln body 1, at least one air distribution pipe 5 is connected to the air outlet end of the air supply pipe 3, and the air outlet pipe 6 is evenly installed on the air distribution pipe 5.

[0026] The flue gas inside the kiln body 1 (glass kiln) passes through the flue, and exchanges heat with the combustion-supporting gas in the preheating tube 4 in the flue to increase the temperature of the combustion-supporting gas. Then, under the distribution of the gas distribution tube 5, the glass solution in the kiln pool of the kiln body 1 is bubbled, and a certain amount of combustion-supporting gas can also be provided to the kiln to ensure the combustion effect. The excess heat in the flue gas in the kiln is used to preheat the combustion-supporting gas. The preheated combustion-supporting gas will not or rarely absorb the heat in the kiln. First, the temperature in the kiln is stabilized, the heat obtained by the batch material is guaranteed as much as possible, and the yield and quality of the product are improved; second, the flue gas is used for preheating to save energy and reduce consumption.

[0027] The gas distribution pipes 5 of the bubbler 2 are not necessarily all under the glass solution. One part can be used alone to supply combustion-supporting gas into the kiln, and the other part mainly plays a bubbling role and also takes into account gas supply and combustion-supporting.

[0028] Preferably, an electric heating jacket 7 is provided on the preheating tube 4 .

[0029] In the case where the flue gas heat is insufficient, the electric heating jacket 7 is used to assist or alone increase the temperature of the preheating tube 4 .

[0030] Preferably, the preheating tube 4 is an S-shaped tube.

[0031] The S-type tube has a large heat exchange length (area) and can improve the heat exchange efficiency.

[0032] Preferably, the top of the gas supply pipe 3 is located outside the kiln body 1 , and a pressure gauge 8 and a temperature gauge 9 are installed on the top of the gas supply pipe 3 .

[0033] Preferably, the gas distribution pipe 5 is composed of a straight pipe 51 and a plurality of annular pipes 52 with different diameters. The plurality of annular pipes 52 are concentrically arranged and communicated with each other through the straight pipe 51 .

[0034] The gas distribution pipe 5 can distribute the gas more evenly through the annular pipe 52 and the straight pipe 51. Example

[0035] Based on the above embodiments, this embodiment Figure 4As shown, a constriction 10 is provided at the bottom of the air outlet pipe 6 , and a high temperature resistant buoyancy ball 11 is provided in the constriction. The high temperature resistant buoyancy ball 11 is connected to the inner wall of the air outlet pipe 6 through a high temperature resistant soft chain 12 .

[0036] The exterior of the high temperature resistant buoyancy ball 11 is a high temperature resistant metal skin, and the interior thereof is hollow or filled with a light refractory material. Under the buoyancy of the glass solution, the gas outlet pipe 6 is closed to prevent backflow.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A furnace oxygen preheating device for producing automobile glass raw sheets, comprising a furnace body (1), characterized in that: The kiln body (1) is provided with a bubbler (2), the bubbler (2) comprising an air supply pipe (3), a preheating pipe (4), an air distribution pipe (5) and an air outlet pipe (6), the air supply pipe (3) being vertically installed in the kiln body (1), at least two of the preheating pipes (4) being connected to the air inlet end of the air supply pipe (3), and the preheating pipe (4) being installed in the inner top flue of the kiln body (1), at least one of the air distribution pipes (5) being connected to the air outlet end of the air supply pipe (3), and the air outlet pipes (6) being evenly installed on the air distribution pipes (5).

2. The oxygen-enriched preheating device for a kiln for producing automobile glass sheets according to claim 1 is characterized in that: The preheating tube (4) is provided with an electric heating jacket (7).

3. The oxygen-enriched preheating device for a kiln for producing automobile glass sheets according to claim 1 is characterized in that: The preheating tube (4) is an S-shaped tube.

4. The oxygen-enriched preheating device for a kiln used for producing automobile glass sheets according to claim 1 is characterized in that: The top of the gas supply pipe (3) is located outside the kiln body (1), and a pressure gauge (8) and a temperature gauge (9) are installed on the top of the gas supply pipe (3).

5. The oxygen-enriched preheating device for a kiln used for producing automobile glass sheets according to claim 1 is characterized in that: The air distribution pipe (5) is composed of a straight pipe (51) and a plurality of annular pipes (52) of different diameters; the plurality of annular pipes (52) are concentrically arranged and are connected to each other via the straight pipe (51).

6. The oxygen-enriched preheating device for a kiln for producing automobile glass sheets according to claim 1 is characterized in that: The bottom of the air outlet pipe (6) is provided with a constriction (10), a high temperature resistant buoyancy ball (11) is arranged in the constriction, and the high temperature resistant buoyancy ball (11) is connected to the inner wall of the air outlet pipe (6) via a high temperature resistant soft chain (12).

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