Method and device for maintaining ceramic fiber filter tube in cold repair period of glass kiln

Abstract

The invention relates to the technical field of maintenance of glass production devices, in particular to a method for maintaining ceramic fiber filter tubes in the cold repair period of a glass kiln, a plurality of ceramic fiber filter tubes are arranged in a dust removal chamber, and an air heater is ingeniously connected with an observation hole of an ash hopper at the lower end of a dust removal chamber; the air heater is used for conveying hot air into the dust removal bin through the observation hole, the temperature in the dust removal bin can be effectively increased, the relative humidity in the dust removal bin can be effectively reduced, and research finds that by adjusting the outlet temperature of the air heater, the temperature in the dust removal bin is maintained to be 70 DEG C or above, and the relative humidity is maintained to be 10% or below; according to the method, zero fracture of the ceramic fiber filter tube after the cold repair period of the glass kiln is finished can be ensured, the effect is outstanding, the method is easy to operate and convenient to control, the selected hot-air blower and the observation hole are ingeniously connected, the effect of maintaining the high temperature is obvious, the cost is low, a large amount of manpower and material resources are not needed, and application and popularization are convenient.

Description

Technical Field

[0001] The invention relates to the technical field of glass production device maintenance, and in particular to a maintenance method and device for a ceramic fiber filter tube during a cold repair period of a glass furnace. Background Art

[0002] Glass kilns, also known as glass melting furnaces, are key equipment for glass production. Their main functions include raw material melting, glass forming and heat treatment. During operation, glass kilns rely on natural gas, oil, coal and other fuels for high-temperature heating. This process inevitably produces waste gases including carbon dioxide, carbon monoxide, nitrogen oxides, sulfur oxides, etc. In order to cope with these emissions, the back end of the glass kiln is usually equipped with a waste treatment system that integrates sulfur, dust and nitrate. In this system, ceramic fiber filter tubes are widely used for waste gas dust removal due to their high temperature resistance and excellent filtering performance.

[0003] The designed kiln life of a glass kiln is usually between 8 and 10 years. After reaching the kiln life, the line must be shut down for cold repair, which is an indispensable part of maintenance management. It is of vital importance to ensure the continuous and stable operation of the kiln, improve production efficiency and product quality, and ensure production safety. However, during the cold repair period of the kiln, due to the lack of a high-temperature heating environment, the humidity in the dust removal chamber will gradually rise, usually reaching a humidity of about 55%. In this high-humidity environment, ceramic fiber filter tubes are prone to moisture absorption, resulting in a significant decrease in their strength, resulting in a large number of filter tube breakages during shutdown or when the system is restarted. The number of ceramic fiber filter tubes configured in a conventional glass production line is between 3,000 and 5,000. If they are disassembled and packaged during the cold repair period, not only will the workload be large and the stacking space required be large, but a large amount of consumables will also be lost during the disassembly process, such as gaskets.

[0004] In view of this, developing a maintenance method for ceramic fiber filter tubes during the cold maintenance period of a glass furnace with simple construction, convenient operation, low loss and high cost-effectiveness has important practical significance and application value for the industry. Summary of the invention

[0005] The purpose of the present invention is to provide a maintenance method and device for ceramic fiber filter tubes during the cold maintenance period of a glass kiln in response to the problems existing in the prior art. The hot air blower is cleverly connected to the observation hole of the ash hopper at the lower end of the dust removal chamber, and the hot air blower is used to transport hot air into the dust removal chamber through the observation hole, which can effectively increase the temperature in the dust removal chamber and reduce the relative humidity in the dust removal chamber. The ceramic fiber filter tubes in the dust removal chamber achieve a zero breakage effect after the cold maintenance period of the glass kiln. The method is simple to operate, easy to control, low in cost, does not require a large amount of manpower and material resources, and is easy to promote and apply.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is: A maintenance method for a ceramic fiber filter tube during a cold repair period of a glass furnace, wherein a plurality of ceramic fiber filter tubes are arranged in a dust removal chamber, comprising the following steps: Step 1: Connect the hot air blower to the observation hole of the ash hopper at the lower end of the dust removal chamber; Step 2: Start the hot air blower; Step 3: Maintain the temperature in the dust removal chamber above 70°C and the relative humidity below 10% by adjusting the outlet temperature of the hot air blower.

[0007] The present invention provides a maintenance method for ceramic fiber filter tubes during the cold maintenance period of a glass kiln. A plurality of ceramic fiber filter tubes are arranged in a dust removal chamber. The present invention cleverly connects a hot air blower with an observation hole of an ash hopper at the lower end of the dust removal chamber. The hot air blower is used to transport hot air into the dust removal chamber through the observation hole, which can effectively increase the temperature in the dust removal chamber and reduce the relative humidity in the dust removal chamber. Studies have found that by adjusting the outlet temperature of the hot air blower, the temperature in the dust removal chamber is maintained above 70°C and the relative humidity is maintained below 10%, which can ensure that the ceramic fiber filter tubes achieve zero breakage after the cold maintenance period of the glass kiln is over, and the effect is significant. The method is simple to operate and easy to control. The clever connection between the selected hot air blower and the observation hole can significantly maintain a higher temperature, has a low cost, does not require a large amount of manpower and material resources, and is easy to promote and apply.

[0008] Furthermore, in step 1, the specific operation process is: remove the blind plate at the ash hopper observation hole and install flanges and pipes; use a connecting pipe to connect the hot air blower outlet to the pipe. The present invention cleverly uses a hot air blower as a heat source and uses the observation hole of the lower ash hopper as a heat input port. It does not require major renovation and construction, has low cost, is easy to control, and has achieved unexpected technical effects with low operating difficulty.

[0009] Preferably, the connecting pipe is a high temperature resistant rubber pipe. The high temperature resistant rubber pipe can withstand the outlet temperature of the hot air blower. For example, if the outlet temperature of the hot air blower is set at about 150°C, the high temperature resistant rubber pipe can be selected to withstand 200°C. The high temperature resistant rubber pipe is easy to install and use, has low cost, good sealing performance, and good high temperature resistance.

[0010] Furthermore, when the number of ceramic fiber filter tubes in the dust removal chamber is more than 300, the power of the hot air blower is more than 30KW. The study found that when the number of ceramic fiber filter tubes is large, the power of the hot air blower is too low to make the dust removal chamber reach the ideal relative humidity, and a large number of ceramic fiber filter tubes break during shutdown or when the system is restarted.

[0011] Furthermore, in step 3, the temperature in the dust removal chamber is maintained at 70°C to 80°C.

[0012] Furthermore, in step 3, the relative humidity in the dust removal chamber is 5% to 10%.

[0013] Research has found that maintaining the temperature of the dust removal chamber at 70℃-80℃ and the relative humidity at 5%-10% can not only ensure zero breakage of the ceramic fiber filter tubes in the dust removal chamber for up to a year, but also make the temperature easy to reach and maintain without wasting resources.

[0014] Furthermore, it also includes the ash hopper for ash discharge. A certain amount of dust is attached to the ceramic fiber filter tube in the dust removal chamber. After the hot air blower works for a long time, the dust will separate from the ceramic fiber filter tube and deposit into the ash hopper.

[0015] Another object of the present invention is to provide a device used in the above maintenance method.

[0016] A device used in the above-mentioned maintenance method of ceramic fiber filter tubes during the cold repair period of a glass furnace comprises a hot air blower and a connecting pipe; The hot air blower is connected to the observation hole of the ash hopper at the lower end of the dust removal chamber through a connecting pipe, and the hot air blower is used to transport hot air into the dust removal chamber.

[0017] The device provided by the present invention has a simple structure, low cost, low operating difficulty, obvious operating effect, and is easy to promote.

[0018] Furthermore, a DCS system is also included, and the DCS system is electrically connected to the thermocouple in the dust removal chamber. The DCS system can receive the signal of the thermocouple in the dust removal chamber and monitor the chamber temperature in real time, which is convenient to use.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention provides a maintenance method for ceramic fiber filter tubes during the cold repair period of a glass kiln. A plurality of ceramic fiber filter tubes are arranged in a dust removal chamber. The present invention cleverly connects a hot air blower to an observation hole of an ash hopper at the lower end of the dust removal chamber. The hot air blower is used to transport hot air into the dust removal chamber through the observation hole, which can effectively increase the temperature in the dust removal chamber and reduce the relative humidity in the dust removal chamber. Studies have shown that by adjusting the outlet temperature of the hot air blower, the temperature in the dust removal chamber is maintained above 70°C and the relative humidity is maintained below 10%, which can ensure that the ceramic fiber filter tubes achieve zero breakage after the cold repair period of the glass kiln is over, and the effect is significant. The method is simple to operate and easy to control. The clever connection between the selected hot air blower and the observation hole can maintain a relatively high temperature, has a low cost, does not require a large amount of manpower and material resources, and is easy to promote and apply.

[0020] 2. The maintenance method provided by the present invention adopts a hot air blower with high heating efficiency, accurately controls the temperature of the dust removal chamber, and greatly reduces the maintenance cost of the ceramic fiber filter tube.

[0021] 3. The maintenance method provided by the present invention uses a hot air blower for heating, thereby avoiding environmental pollution and reducing operational safety risks.

[0022] 4. The maintenance device provided by the present invention comprises a hot air blower and a connecting pipe; the hot air blower is connected to the observation hole of the ash hopper at the lower end of the dust removal chamber through the connecting pipe, and the hot air blower is used to transport hot air into the dust removal chamber. The structure is simple, the cost is low, the operation difficulty is small, the operation effect is obvious, and it is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the dust removal chamber after the maintenance device is installed.

[0024] Icons: 1-dust removal chamber; 11-ash hopper; 111-observation hole; 2-hot air blower; 3-connecting pipe; 4-DCS system. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product / equipment / device is placed when it is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0028] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0029] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0030] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0031] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0032] Example 1 Glass kilns, also known as glass melting furnaces, are key equipment for glass production. Their main functions include raw material melting, glass forming and heat treatment. During operation, glass kilns rely on natural gas, oil, coal and other fuels for high-temperature heating. This process inevitably produces waste gases including carbon dioxide, carbon monoxide, nitrogen oxides, sulfur oxides, etc. In order to cope with these emissions, the back end of the glass kiln is usually equipped with a waste treatment system that integrates sulfur, dust and nitrate. In this system, ceramic fiber filter tubes are widely used for waste gas dust removal due to their high temperature resistance and excellent filtering performance.

[0033] The designed kiln life of a glass kiln is usually between 8 and 10 years. After reaching the kiln life, the line must be shut down for cold repair, which is an indispensable part of maintenance management. It is of vital importance to ensure the continuous and stable operation of the kiln, improve production efficiency and product quality, and ensure production safety. However, during the cold repair period of the kiln, due to the lack of a high-temperature heating environment, the humidity in the dust removal chamber will gradually rise, usually reaching a humidity of about 55%. In this high-humidity environment, ceramic fiber filter tubes are prone to moisture absorption, resulting in a significant decrease in their strength, resulting in a large number of filter tube breakages during shutdown or when the system is restarted. The number of ceramic fiber filter tubes configured in a conventional glass production line is between 3,000 and 5,000. If they are disassembled and packaged during the cold repair period, not only will the workload be large and the stacking space required be large, but a large amount of consumables will also be lost during the disassembly process, such as gaskets.

[0034] In a glass manufacturer, the dust removal system is divided into 12 dust removal chambers, each of which is equipped with 440 ceramic fiber filter tubes.

[0035] The solution proposed by the filter tube manufacturer is to install a burner at the front end of the dust removal system, that is, at the bottom of the desulfurization tower, and circulate heat in the system with the help of an induced draft fan, so as to increase the chamber temperature and prevent the filter tube from getting wet. However, this solution will face the following challenges: 1) Difficulty in construction: The flue gas treatment capacity of the integrated sulfur, dust and nitrate system of the glass production line is designed to be approximately 200,000 cubic meters per hour, and the flue diameter is approximately 2.2 meters. The plan requires that the fan outlet flue be connected to the inlet flue of the integrated system, and this transformation process is difficult to construct.

[0036] 2) High cost of transformation: The burners, natural gas pipelines, flues, operating platforms and other equipment involved in the plan need to be purchased additionally. The total cost of equipment and transformation is expected to reach about 800,000 yuan.

[0037] 3) High operating costs: According to the design, the natural gas consumption of the burner is 40 cubic meters per hour, and the power of the induced draft fan is about 150 kilowatts per hour, which means that the monthly operating cost is about 130,000 yuan.

[0038] 4) Difficult operation: During the implementation of the plan, it is necessary to adjust multiple parameters such as natural gas flow and fan frequency at the same time, and closely monitor the combustion status of the burner, which undoubtedly increases the difficulty of operating the chamber temperature control.

[0039] In summary, although this solution aims to solve the problem of filter tube moisture, factors such as construction difficulty, cost investment and operational complexity need to be fully considered before implementation.

[0040] To this end, the present embodiment provides a method and device for maintaining a ceramic fiber filter tube during the cold repair period of a glass furnace.

[0041] Devices such as Figure 1 As shown, it includes a hot air blower 2 and a connecting pipe 3; the hot air blower 2 is connected to the observation hole 111 of the ash hopper 11 at the lower end of the dust removal chamber 1 through the connecting pipe 3, and the hot air blower 2 is used to transport hot air into the dust removal chamber 1 through the observation hole 111. A plurality of ceramic fiber filter tubes are arranged in the dust removal chamber 1.

[0042] The overall structure is simple, and the hot air blower 2 is used to deliver hot air into the dust removal chamber 1 through the observation hole 111, which can effectively increase the temperature in the dust removal chamber 1 and reduce the relative humidity. The hot air blower 2 is a mature equipment, and the air outlet temperature and air volume of the hot air blower 2 can be adjusted on the operation panel of the hot air blower 2. The operation is simple and convenient, the whole process is easy to control, and the cost is low.

[0043] In some embodiments, the connecting pipe 3 is a high temperature resistant rubber tube, and the outlet pipe of the hot air blower 2 has the same diameter as the observation hole 111 of the ash hopper 11 of the dust removal chamber 1. During installation, it only needs to be connected using a high temperature resistant rubber tube, which is easy to install, has low labor costs, and saves time and effort.

[0044] In this embodiment, the outlet temperature of the hot air blower 2 is controlled at about 150° C., so that the temperature in the dust removal chamber 1 can be controlled at above 70° C.

[0045] Furthermore, it also includes a DCS system 4, which is electrically connected to the thermocouple in the dust removal chamber 1. The DCS system 4 can receive the signal of the thermocouple in the dust removal chamber 1 and monitor the chamber temperature in real time, which is convenient to use.

[0046] The method comprises the following steps: A maintenance method for a ceramic fiber filter tube during a cold repair period of a glass furnace, wherein a plurality of ceramic fiber filter tubes are arranged in a dust removal chamber 1, comprising the following steps: Step 1: Connect a 40KW hot air blower 2 to the observation hole 111 of the ash hopper 11 at the lower end of the dust removal chamber 1 (taking the number of ceramic fiber filter tubes in the dust removal chamber 1 as an example, 440), and the air volume of the hot air blower 2 is 1500m 3 / h; Step 2, start the hot air blower 2; Step 3: By adjusting the outlet temperature of the hot air blower 2 to 150° C., the temperature in the dust removal chamber 1 is maintained above 70° C. and the relative humidity is maintained below 10%.

[0047] The present invention cleverly connects the hot air blower 2 with the observation hole 111 of the ash hopper 11 at the lower end of the dust removal chamber 1, and uses the hot air blower 2 to transport hot air into the dust removal chamber 1 through the observation hole 111, which can effectively increase the temperature in the dust removal chamber 1 and reduce the relative humidity in the dust removal chamber 1. Studies have found that by adjusting the outlet temperature of the hot air blower 2, the temperature in the dust removal chamber 1 is maintained above 70°C and the relative humidity is maintained below 10%, which can ensure that the ceramic fiber filter tube achieves zero breakage after the cold repair period of the glass kiln is over, and the effect is significant. The method is simple to operate and easy to control. The clever connection between the selected hot air blower 2 and the observation hole 111 has a significant effect of maintaining a higher temperature, has a low cost, does not require a large amount of manpower and material resources, and is easy to promote and apply.

[0048] In some embodiments, in step 1, the specific operation process is: remove the blind plate at the observation hole 111 of the ash hopper 11 and install flanges and pipes; use a rubber tube to connect the outlet of the hot air blower 2 to the pipe. The present invention cleverly selects the hot air blower 2 as the heat source and uses the observation hole 111 of the lower ash hopper 11 as the heat input port. It does not require major renovation and construction, has low cost, is easy to control, and has achieved unexpected technical effects with low operating difficulty.

[0049] In some embodiments, when the number of ceramic fiber filter tubes in the dust removal chamber 1 is more than 300, the power of the hot air blower 2 is more than 30KW. Studies have found that when the number of ceramic fiber filter tubes is large, the power of the hot air blower 2 is too low to make the dust removal chamber 1 reach the ideal relative humidity, and a large number of ceramic fiber filter tubes break during shutdown or when the system is restarted.

[0050] In some embodiments, in step 3, the temperature in the dust removal chamber 1 is maintained at 70°C to 80°C.

[0051] In some embodiments, in step 3, the relative humidity in the dust removal chamber 1 is 5% to 10%.

[0052] Research has found that maintaining the temperature of the dust removal chamber 1 at 70℃-80℃ and the relative humidity at 5%-10% can not only ensure zero breakage of the ceramic fiber filter tube in the dust removal chamber 1 for up to one year, but also make the temperature easy to reach and maintain without wasting resources.

[0053] Furthermore, the ash hopper 11 is further provided with ash discharge treatment. A certain amount of dust is attached to the ceramic fiber filter tube in the dust removal chamber 1 . After the hot air blower 2 works for a long time, the dust will be separated from the ceramic fiber filter tube and deposited in the ash hopper 11 .

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A maintenance method for ceramic fiber filter tubes during the cold repair period of a glass furnace, wherein a plurality of ceramic fiber filter tubes are arranged in a dust removal chamber, characterized in that: The following steps are involved: Step 1: Connect the hot air blower to the observation hole of the ash hopper at the lower end of the dust removal chamber; Step 2: Start the hot air blower; Step 3: Maintain the temperature in the dust removal chamber above 70°C and the relative humidity below 10% by adjusting the outlet temperature of the hot air blower.

2. The maintenance method of the ceramic fiber filter tube during the cold repair period of the glass furnace according to claim 1 is characterized in that: In the step 1, the specific operation process is: remove the blind plate at the ash hopper observation hole and install the flange and pipeline; use the connecting pipe to connect the hot air blower outlet with the pipeline.

3. The maintenance method of the ceramic fiber filter tube during the cold repair period of the glass furnace according to claim 2 is characterized in that: The connecting pipe is a high temperature resistant rubber pipe.

4. The maintenance method of the ceramic fiber filter tube during the cold repair period of the glass furnace according to claim 1 is characterized in that: When the number of ceramic fiber filter tubes in the dust removal chamber is more than 300, the power of the hot air blower is more than 30KW.

5. The maintenance method of the ceramic fiber filter tube during the cold repair period of the glass furnace according to claim 1 is characterized in that: In step 3, the temperature in the dust removal chamber is maintained at 70° C. to 80° C.

6. The maintenance method of the ceramic fiber filter tube during the cold repair period of the glass furnace according to claim 1 is characterized in that: In step 3, the relative humidity in the dust removal chamber is 5% to 10%.

7. The maintenance method of the ceramic fiber filter tube during the cold repair period of a glass furnace according to any one of claims 1 to 6, characterized in that: It also includes ash discharge from the ash hopper.

8. A device used in the maintenance method of the ceramic fiber filter tube during the cold repair period of a glass furnace as described in any one of claims 1 to 7, characterized in that: Including hot air blower, connecting pipe; The hot air blower is connected to the observation hole of the ash hopper at the lower end of the dust removal chamber through a connecting pipe, and the hot air blower is used to transport hot air into the dust removal chamber through the observation hole.

9. The device according to claim 8, characterized in that Also included is a DCS system, which is electrically connected to the thermocouple in the dust removal chamber.

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