Flue and glass furnace

Abstract

The utility model belongs to glass kiln flue technical field, disclose a kind of exhaust flue and glass kiln, the exhaust flue includes pipeline body, automatic regulating valve and manometer. Automatic regulating valve is set to pipeline body, for adjusting the opening of pipeline body. Manometer is set between the inlet of pipeline body and automatic regulating valve, one end of manometer is inserted into pipeline body, for measuring the air pressure at the inlet of pipeline body and controlling automatic regulating valve. The exhaust flue provided by the utility model detects the pressure that is passed into in pipeline body by manometer, and controls the opening and closing degree of automatic regulating valve according to the pressure of detection, can improve the control accuracy of regulating valve, is favorable to more accurate control the flue gas velocity entering exhaust flue. The glass kiln passes above-mentioned exhaust flue, can finally control the gas pressure in glass kiln, keep certain slightly positive pressure environment required during glass kiln melting process, guarantee the glass quality of subsequent production.

Description

Technical Field

[0001] This utility model relates to the field of glass kiln flue technology, and in particular to a flue gas exhaust pipe and a glass kiln. Background Technology

[0002] During the feeding and melting process of raw materials in a glass furnace, many volatile toxic and harmful substances will volatilize under high temperature. In addition, a certain positive pressure environment needs to be maintained in the glass furnace during the melting process to prevent external gases from entering the furnace and affecting the homogeneity of the molten glass.

[0003] Currently, most kiln flue designs regulate pressure by adjusting the opening of the flue damper, but the accuracy of pressure regulation is difficult to control.

[0004] Therefore, there is an urgent need for a flue gas exhaust system and a glass furnace to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a flue gas exhaust pipe and a glass furnace to solve the aforementioned problems in the prior art.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On the one hand, a smoke exhaust duct is provided, including:

[0008] Pipe body;

[0009] An automatic regulating valve is disposed on the pipe body and is used to regulate the opening degree of the pipe body;

[0010] A pressure gauge is installed between the inlet of the pipeline body and the automatic regulating valve. One end of the pressure gauge extends into the pipeline body and is used to measure the air pressure at the inlet of the pipeline body and control the automatic regulating valve.

[0011] Optionally, the pipe body includes:

[0012] The first pipe has one end for introducing gas;

[0013] The second pipe has one end connected to the outlet of the first pipe and the other end used to discharge gas. The second pipe is equipped with a cleaning port and a cooling component. Along the gas conveying direction, the cleaning port is provided upstream and downstream of the cooling component in the second pipe.

[0014] Optionally, the second pipe is provided with a connecting pipe, a cooling pipe and a discharge pipe connected in sequence;

[0015] The connecting pipe is connected to the other end of the first pipe, and the cooling pipe is provided with the cooling component.

[0016] Optionally, the second pipeline is also provided with a spare pipeline;

[0017] One end of the connecting pipe is connected to the first pipe, and the other end can be selectively connected to the cooling pipe or the spare pipe;

[0018] The ends of both the cooling pipe and the spare pipe furthest from the connecting pipe are connected to the discharge pipe.

[0019] Optionally, a sealing plate is also provided on the second pipe, which can selectively seal the cooling pipe.

[0020] Optionally, the spare tube includes a spare tube body and a rotating plate disposed on the spare tube body, the rotating plate selectively blocking the spare tube body.

[0021] Optionally, the exhaust duct further includes an ash collection box, and the ash removal port may be selectively connected to the ash collection box.

[0022] Optionally, the first pipe is provided with thermal insulation material.

[0023] Optionally, the exhaust duct further includes a manual regulating valve, which is disposed between the automatic regulating valve and the pressure gauge.

[0024] On the other hand, a glass furnace is provided, including a furnace body and the aforementioned exhaust pipe, wherein the inlet of the exhaust pipe is connected to the interior of the furnace body.

[0025] The beneficial effects of this utility model are:

[0026] The present invention proposes a smoke exhaust duct that incorporates a pressure gauge and an automatic regulating valve on the duct body. The pressure gauge is positioned between the inlet of the duct body and the automatic regulating valve, extending into the duct body to detect the pressure flowing through it. Based on the detected pressure, the opening and closing degree of the automatic regulating valve is controlled, thereby improving the control accuracy of the regulating valve and facilitating more precise control of the flue gas velocity entering the smoke exhaust duct.

[0027] The glass furnace proposed in this utility model can automatically adjust the opening of the gate valve through the above-mentioned flue gas pipe, thereby changing the cross-sectional area of ​​the pipe body, thus affecting the flue gas discharge rate, and ultimately controlling the gas pressure in the glass furnace. This maintains a certain positive pressure environment during the glass melting process, ensuring the quality of the glass produced subsequently. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the smoke exhaust pipe provided in an embodiment of this utility model.

[0030] In the picture:

[0031] 1. First pipe; 2. Second pipe; 21. Connecting pipe; 22. Cooling pipe; 221. First cooling pipe; 222. Second cooling pipe; 23. Discharge pipe; 24. Spare pipe; 241. Rotating plate; 242. Spare pipe body; 25. Sealing plate; 3. Automatic regulating valve; 4. Pressure gauge; 5. Ash removal port; 6. Cooling component; 7. Ash collection box; 8. Manual regulating valve. Detailed Implementation

[0032] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] like Figure 1 As shown, this embodiment provides a glass furnace, including a furnace body and a flue gas duct, the inlet of which is connected to the interior of the furnace body. It can be understood that the high-temperature exhaust gas generated inside the furnace body enters the flue gas duct and is discharged through it.

[0036] like Figure 1 As shown, to maintain a certain positive pressure environment in the furnace body during the melting process and prevent external ambient gases from intruding into the furnace and affecting the homogeneity of the molten glass, the exhaust duct includes a duct body, an automatic regulating valve 3, and a pressure gauge 4. The automatic regulating valve 3 is located in the duct body and is used to adjust the opening of the duct body. The pressure gauge 4 is located between the inlet of the duct body and the automatic regulating valve 3, with one end extending into the duct body to measure the gas pressure at the inlet of the duct body and control the automatic regulating valve 3.

[0037] For example, the automatic regulating valve 3 can be controlled by a motor through PLC calculation based on the data measured by the pressure gauge 4, thereby covering the cross-sectional area inside the pipe body and controlling the pressure inside the kiln body. Of course, the automatic regulating valve 3 and the pressure gauge 4 can also cooperate in other ways, which will not be elaborated here.

[0038] It is understood that this utility model, by installing a pressure gauge 4 and an automatic regulating valve 3 on the pipe body, improves the control accuracy of the regulating valve. This allows for more precise control of the flue gas rate entering the exhaust pipe, ultimately controlling the gas pressure inside the glass furnace. This maintains a certain slightly positive pressure environment required during the glass furnace melting process, ensuring the quality of the glass produced subsequently.

[0039] Furthermore, the pipeline body provided in this embodiment of the present invention includes a first pipeline 1 and a second pipeline 2. One end of the first pipeline 1 is inserted into the kiln body to allow the waste gas generated by the kiln body to pass through. One end of the second pipeline 2 is connected to the outlet of the first pipeline 1, and the other end is used to discharge gas. The second pipeline 2 is provided with a cleaning port 5 and a cooling element 6. Along the gas conveying direction, cleaning ports 5 are provided upstream and downstream of the cooling element 6 in the second pipeline 2. The cooling element 6 is sufficient to cool the waste gas entering the pipeline, causing the ambient temperature inside the second pipeline 2 to drop sharply. When the waste gas enters the second pipeline 2, easily crystallizable substances in the waste gas are fully precipitated.

[0040] For example, the cooling element 6 is a cold water pipe installed on the second pipe 2. When high-temperature exhaust gas enters the second pipe 2, the ambient temperature drops sharply under the action of the cooling element 6, causing easily crystallizing substances to precipitate. Of course, the cooling element 6 can also be in other forms, as long as it can achieve rapid cooling of the high-temperature exhaust gas entering the second pipe 2.

[0041] For example, such as Figure 1 As shown, in this embodiment, the dust removal port 5 is a protruding, rotatable threaded cover. When it is necessary to clean the precipitate, the threaded cover can be rotated open to discharge the precipitate. Of course, the dust removal port 5 can also be in the form of a sealing baffle that can be rotatably or slidably opened at one end via a hinge or similar means.

[0042] Furthermore, in order to ensure that the ambient temperature of the first pipe 1 is not too different from the ambient temperature inside the kiln body when the exhaust gas is discharged from the kiln body to the flue pipe, so as to prevent easily crystallizable substances in the exhaust gas from precipitating at the inlet of the first pipe 1 and causing blockage at the inlet of the first pipe 1, in this embodiment, heat insulation material is provided on the first flue. The temperature of the exhaust gas will not drop significantly when it passes through the first pipe 1, thus preventing easily crystallizable substances from precipitating in the first pipe 1.

[0043] For example, in this embodiment, the insulation material is an aluminum silicate fiber blanket, which ensures the temperature of the volatile gas in the first pipe 1 and prevents the gas from precipitating crystals.

[0044] For example, the first pipe 1 can be a brick pipe, such as high-alumina bricks or clay bricks. Brick pipes have effective high-temperature pressure resistance, can withstand the high-temperature exhaust gas from the kiln, and can ensure the thermal stability at the connection with the kiln. At the same time, brick pipes can reduce heat loss of exhaust gas and further prevent easily crystallizing substances from precipitating in the first pipe 1, thereby ensuring stable control of the pressure inside the kiln. The brick pipe is covered with an insulation layer, which further prevents the high-temperature exhaust gas from experiencing a temperature drop when passing through the first pipe 1.

[0045] Further, see Figure 1In this embodiment, the second pipe 2 is provided with a connecting pipe 21, a cooling pipe 22, and a discharge pipe 23 connected in sequence. The connecting pipe 21 is connected to the other end of the first pipe 1, and the cooling pipe 22 is provided with a cooling component 6.

[0046] For example, the connecting pipe 21, cooling pipe 22, and discharge pipe 23 are all made of steel. Steel pipes are low in cost, have strong sealing properties, and are easy to remove precipitated crystals.

[0047] More specifically, such as Figure 1 As shown, the first pipe 1 is horizontally installed on the kiln body. There are two cooling pipes 22: a first cooling pipe 221 and a second cooling pipe 222. The connecting pipe 21, the first cooling pipe 221, the second cooling pipe 222, and the discharge pipe 23 are arranged in a continuous U-shape. The connecting pipe 21 is vertically connected to the first pipe 1 and located below it. It can be understood that the connecting pipe 21, the first cooling pipe 221, the second cooling pipe 222, and the discharge pipe 23 are all arranged vertically. The top of the connecting pipe 21 is connected to the end of the first pipe 1 furthest from the kiln body. The first cooling pipe 221 is connected to the bottom of the connecting pipe 21. The top of the first cooling pipe 221 is connected to the top of the second cooling pipe 222. The bottom of the second cooling pipe 222 is connected to the bottom of the discharge pipe 23. Exhaust gas is discharged from the top of the discharge pipe 23. This design allows the high-temperature exhaust gas to change direction multiple times after entering the second pipe 2, which not only ensures sufficient heat exchange with the cooling pipe 22 and guarantees the full release of easily crystallizing substances, but also makes it easier for these substances to accumulate at the inflection point.

[0048] A cleaning port 5 is provided at the connection points of the connecting pipe 21 and the first cooling pipe 221, the connection points of the first cooling pipe 221 and the second cooling pipe 222, and the connection points of the second cooling pipe 222 and the discharge pipe 23. It is understood that by providing the cooling element 6 on the cooling pipe 22, the ambient temperature inside the cooling pipe 22 drops rapidly. When the high-temperature exhaust gas enters the cooling pipe 22, its temperature drops rapidly, causing a large amount of easily crystallizing substances in the exhaust gas to precipitate within the cooling pipe 22. The two cooling pipes 22 further accelerate the rate at which the exhaust gas temperature decreases. The cleaning port 5 is located near the accumulation point of the easily crystallizing substances, facilitating the removal of the precipitated crystals from the cooling pipe 22 and preventing the crystals from accumulating in the cooling pipe 22 for a long time, thus preventing blockage.

[0049] Furthermore, the second pipe 2 is also equipped with a spare pipe 24. One end of the connecting pipe 21 is connected to the first pipe 1, and the other end can be selectively connected to the cooling pipe 22 or the spare pipe 24. The ends of both the cooling pipe 22 and the spare pipe 24 furthest from the connecting pipe 21 are connected to the discharge pipe 23. It is understood that when it is necessary to clean the precipitates on the top of the cooling pipe 22, the connecting pipe 21 is switched to be connected to the spare pipe 24. At this time, the high-temperature exhaust gas produced by the kiln body goes to the discharge pipe 23 through the spare pipe 24 without passing through the cooling pipe 22, thus not affecting the cleaning of the precipitates in the cooling pipe 22.

[0050] Furthermore, a sealing plate 25 is also provided on the second pipe 2, which can selectively seal the cooling pipe 22.

[0051] For example, such as Figure 1 As shown, in this embodiment, there are two sealing plates 25, one on each of the first cooling pipe 221 and the second cooling pipe 222. When it is necessary to clean the precipitates at the top of the cooling pipe 22, the sealing plates 25 respectively seal the ends of the first cooling pipe 221 and the second cooling pipe 222 away from each other, preventing exhaust gas from entering and affecting the cleaning of the precipitates inside the first cooling pipe 221 and the second cooling pipe 222. The sealing plates 25 are slidably mounted on the first cooling pipe 221 and the second cooling pipe 222, and can be removed from the first cooling pipe 221 and the second cooling pipe 222 when sealing is not required.

[0052] Of course, in other embodiments, the sealing plate 25 can also be configured in other ways, as long as it can effectively seal the first cooling pipe 221 and the second cooling pipe 222 to prevent fumes from entering during cleaning. For example, it can be rotatably installed inside the first cooling pipe 221 and the second cooling pipe 222 respectively, and the sealing plate 25 rotates to the sealing position during cleaning.

[0053] Furthermore, the backup pipe 24 includes a backup pipe body 242 and a rotating plate 241 disposed on the backup pipe body 242. The rotating plate 241 can selectively block the backup pipe body 242. It is understood that the first cooling pipe 221 and the second cooling pipe 222 are provided with openings that match the size of the backup pipe body 242. The rotating plate 241 is rotatably disposed at the opening. During normal operation, the rotating plate 241 blocks this opening, so that the flue gas enters the first cooling pipe 221 and the second cooling pipe 222 after passing through the connecting pipe 21, and then enters the discharge pipe 23, without passing through the connecting pipe 21 before entering the backup pipe body 242.

[0054] When it is necessary to connect the connecting pipe 21 to the spare pipe 24 to clean the precipitates on the top of the cooling pipe 22, the sealing plates 25 installed on the first cooling pipe 221 and the second cooling pipe 222 seal both of them, and the rotating plate 241 installed on the spare pipe body 242 rotates open. After passing through the connecting pipe 21, the exhaust gas enters the spare pipe body 242 and flows to the discharge pipe 23, ensuring that the high-temperature exhaust gas produced by the kiln body can be discharged normally without stopping the kiln body and ensuring production efficiency.

[0055] Furthermore, the exhaust duct also includes an ash collection box 7, which is correspondingly installed with the ash removal port 5. It is understood that by setting up the ash collection box 7, the precipitates in the first cooling pipe 221 and the second cooling pipe 222 can be collected more effectively, facilitating the subsequent treatment of the precipitates and preventing environmental pollution.

[0056] For example, such as Figure 1 As shown, the cleaning port 5 between the connecting pipe 21 and the first cooling pipe 221, and the cleaning port 5 between the second cooling pipe 222 and the discharge pipe 23, are located on the downward-facing side of the pipes, and a corresponding dust collection box 7 is provided. The cleaning port 5 at the connection between the first cooling pipe 221 and the second cooling pipe 222 does not have a dust collection box 7. It is understood that when cleaning the precipitates inside the first cooling pipe 221 and the second cooling pipe 222 through the cleaning port 5 between them, the precipitates can fall onto the sealing plate 25 under their own gravity. After cleaning, when the sealing plate 25 does not seal the first cooling pipe 221 and the second cooling pipe 222, the precipitates will fall to the cleaning port 5 between the connecting pipe 21 and the first cooling pipe 221, and the cleaning port 5 between the second cooling pipe 222 and the discharge pipe 23, thus reducing the need for a dust collection box 7 and reducing costs.

[0057] Furthermore, the flue gas duct also includes a manual regulating valve 8, which is located between the automatic regulating valve 3 and the pressure gauge 4. It is understood that by providing the manual regulating valve 8 and placing it between the automatic regulating valve 3 and the pressure gauge 4, the pressure within the kiln body can be controlled manually when the automatic regulating valve 3 is damaged or requires routine maintenance.

[0058] For example, both the manual regulating valve 8 and the automatic regulating valve 3 are corundum brick gate valves. Corundum brick gate valves have excellent high temperature resistance and superior corrosion resistance, which can significantly improve the service life of the valve.

[0059] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A smoke exhaust duct, characterized in that, include: Pipe body; An automatic regulating valve (3) is provided on the pipe body and is used to regulate the opening degree of the pipe body; A pressure gauge (4) is installed between the inlet of the pipeline body and the automatic regulating valve (3). One end of the pressure gauge (4) extends into the pipeline body and is used to measure the air pressure at the inlet of the pipeline body and control the automatic regulating valve (3).

2. The smoke exhaust duct according to claim 1, characterized in that, The pipeline body includes: The first pipe (1) has one end for introducing gas; The second pipe (2) is connected at one end to the outlet of the first pipe (1) and at the other end to discharge gas. The second pipe (2) is provided with a cleaning port (5) and a cooling component (6). Along the gas conveying direction, the cleaning port (5) is provided upstream and downstream of the cooling component (6) in the second pipe (2). The cleaning port (5) can be opened.

3. The smoke exhaust duct according to claim 2, characterized in that, The second pipe (2) is provided with a connecting pipe (21), a cooling pipe (22) and a discharge pipe (23) connected in sequence; The connecting pipe (21) is connected to the other end of the first pipe (1), and the cooling pipe (22) is provided with the cooling component (6).

4. The smoke exhaust duct according to claim 3, characterized in that, The second pipe (2) is also equipped with a spare pipe (24); One end of the connecting pipe (21) is connected to the first pipe (1), and the other end can be selectively connected to the cooling pipe (22) or the spare pipe (24); The ends of the cooling pipe (22) and the spare pipe (24) away from the connecting pipe (21) are both connected to the discharge pipe (23).

5. The smoke exhaust duct according to claim 4, characterized in that, The second pipe (2) is also provided with a sealing plate (25), which can selectively block the cooling pipe (22).

6. The smoke exhaust duct according to claim 4, characterized in that, The spare tube (24) includes a spare tube body (242) and a rotating plate (241) disposed on the spare tube body (242), wherein the rotating plate (241) can selectively block the spare tube body (242).

7. The smoke exhaust duct according to claim 2, characterized in that, The exhaust duct also includes an ash collection box (7), which is correspondingly provided with the ash removal port (5).

8. The smoke exhaust duct according to claim 2, characterized in that, The first pipe (1) is provided with thermal insulation material.

9. The smoke exhaust duct according to any one of claims 1-8, characterized in that, The exhaust duct also includes a manual regulating valve (8), which is located between the automatic regulating valve (3) and the pressure gauge (4).

10. A glass furnace, characterized in that, It includes a kiln body and a flue gas duct as described in any one of claims 1-9, wherein the inlet of the flue gas duct is connected to the interior of the kiln body.

Images