Heat preservation and cooling structure of molten glass flowing channel

Abstract

The utility model discloses a heat preservation and cooling structure of a glass liquid circulation channel, and particularly relates to the technical field of glass liquid production, a channel structure comprises a channel and a heat preservation layer, a pipeline is pre-buried in the heat preservation layer, pressure reducing valves are installed at an inlet and an outlet at the head and the tail of the pipeline, and the heat preservation layer is arranged outside the channel. A first heat preservation layer, a second heat preservation layer, a third heat preservation layer and a fourth heat preservation layer are sequentially installed on the outer side of the channel and are tightly attached in sequence, the first heat preservation layer serves as a filling layer, the third heat preservation layer serves as a secondary outer heat preservation layer, and a pipeline is pre-buried in the third heat preservation layer. The number of the pipelines is determined according to heating and cooling requirements, gas or liquid can be introduced into the pipelines to serve as fluid, the fluid circulates in the pipelines to conduct pipeline heat preservation or cooling, and then the heating and cooling rate of molten glass during circulation in the channels is increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to glass liquid production technical field, specifically relates to a glass liquid flow passage heat preservation and cooling structure. BACKGROUND

[0002] In the glass production field, the passage as the core equipment of glass liquid conveying and circulation plays a vital role in product quality. The passage generally mainly includes noble metal passage and refractory material coated in the periphery, and mainly functions to heat preservation of glass liquid in the glass production process and to ensure uniform and efficient cooling of glass liquid to meet the production requirements of the later process.

[0003] Firstly, the passage needs to be heated before circulating glass liquid to ensure that the required temperature of glass liquid circulation is reached. Currently, the passage is heated by increasing the direct heating current. Due to the high required temperature, the current needs to be increased, and the long-term operation of the passage equipment with large current may affect the later operation stability of the passage equipment.

[0004] Secondly, due to the need for uniform cooling of glass liquid in the passage, the current passage has the problem of insufficient power under large extraction or insufficient cooling rate. Generally, the passage is cooled by increasing the passage, which increases the cost of passage construction.

[0005] Finally, in the later stage of operation of the passage equipment, the passage has the risk of material leakage and further erosion of the refractory material. Currently, water-cooled plates are added to the outermost layer of the refractory material in the leakage area to slow down the further deterioration of the leakage, but this method may cause cracking or even falling off of the peripheral heat preservation bricks of the passage, and the water cooling effect of the leaked glass liquid from the outermost layer is greatly reduced. INVENTION CONTENTS

[0006] In view of the technical problem of slow heating and cooling efficiency of glass liquid in the flow passage in the prior art, the utility model provides a glass liquid flow passage high-efficiency heating and cooling structure.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A glass liquid flow passage heat preservation and cooling structure, which mainly comprises a passage and a heat preservation layer, the heat preservation layer is arranged outside the passage, a pipe is embedded in the heat preservation layer, and a pressure reducing valve is installed at the inlet and outlet of the pipe.

[0009] The heat preservation layer comprises a first heat preservation layer, a second heat preservation layer, a third heat preservation layer and a fourth heat preservation layer, and the first heat preservation layer, the second heat preservation layer, the third heat preservation layer and the fourth heat preservation layer are tightly adhered in sequence.

[0010] The number of heat preservation layers in the heat preservation layer is greater than or equal to 4.

[0011] The first heat preservation layer is closely attached to the channel, and the first heat preservation layer serves as a filling layer between the channel and the second heat preservation layer.

[0012] The third heat preservation layer is a secondary outer heat preservation layer, and a reserved space is arranged in the third heat preservation layer.

[0013] The pipes are uniformly arranged in the reserved space of the third heat preservation layer.

[0014] The pipes are closely fixed in the third heat preservation layer by being filled with slurry.

[0015] The diameter of the pipes is 10-30 mm, and the thickness of the pipes is 3-8 mm.

[0016] The temperature of the third heat preservation layer is less than or equal to 80% of the highest temperature borne by the pipes.

[0017] The number of the pipes is determined according to the heating and cooling requirements of the glass liquid in the channel.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The utility model discloses a glass liquid flow channel heat preservation and cooling structure, through setting up heat preservation layer outside the channel, and embedding the pipe in the heat preservation layer, realize the quick heating and cooling of the channel, use the pressure reducing valve to control the pressure of the cooling fluid in the pipe, is the pipe in keeping constant pressure, guarantee the heat preservation effect when heating, accelerate the heating rate, when the cooling fluid is introduced in the channel, then further accelerate the cooling rate through the circulation of the cooling fluid, effectively shorten the heating or cooling time, improve the heating and cooling efficiency of the glass liquid in the channel circulation, reduce the energy consumption.

[0020] Further, the heat preservation layer constructs the composite heat preservation structure that comprises the first heat preservation layer, the second heat preservation layer, the third heat preservation layer and the fourth heat preservation layer, and each layer is closely attached, forms the high -efficient heat shield, strengthens the heat preservation effect, reduces the heat energy loss, improves the temperature control efficiency.

[0021] Further, the number of layers in the heat preservation layer is not limited to four, and the heat preservation layer design of more than four layers ensures the complexity and adaptability of the heat preservation layer structure, and each layer material and thickness can be adjusted according to specific requirements, so that the best heat preservation and heat dissipation balance is achieved, and the temperature control precision and efficiency are further improved.

[0022] Further, the first heat preservation layer directly contacts the channel and serves as a filling layer, which not only strengthens the sealing property between the channel and the heat preservation layer, but also promotes the uniformity of heat transfer and prevents local overheating or overcooling.

[0023] Further, the third heat preservation layer reserves space, and the third heat preservation layer serves as a secondary outer heat preservation layer, and a reserved space is arranged inside, so that installation of the pipeline is facilitated, and pipeline layout can be adjusted according to actual needs, and heat exchange efficiency is optimized.

[0024] Further, the pipeline is uniformly arranged, the pipeline is uniformly distributed in the reserved space of the third heat preservation layer, the flow of the heating or cooling fluid in the pipeline is more uniform, the formation of hot spots and cold spots is avoided, and the uniformity and efficiency of temperature control are improved.

[0025] Further, the pipeline is fixed by the slurry, the stability and sealing performance of the pipeline in the third heat preservation layer are ensured, heat energy leakage is reduced, and stable operation of the entire system is enhanced.

[0026] Further, the pipeline size is optimized, the diameter and thickness of the pipeline are within a reasonable range, sufficient fluid flux is ensured, the mechanical strength and heat exchange efficiency of the pipeline itself are ensured, and the temperature control response speed is further improved.

[0027] Further, the temperature of the third heat preservation layer is limited, the temperature of the third heat preservation layer is ensured to be less than 80% of the maximum bearing temperature of the pipeline, the pipeline is prevented from being damaged due to overheating, the service life of the equipment is prolonged, and production safety is ensured.

[0028] Further, the number of pipelines is flexible, the number of pipelines is flexibly adjusted according to actual temperature rising and temperature dropping needs, accurate matching of temperature control needs is realized, resource waste is avoided, and the maximization of temperature control effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a main view of a glass liquid flow passage structure.

[0030] Figure 2 It is a main view of a glass liquid flow passage heat preservation and cooling structure.

[0031] Figure 3 It is an internal pipeline section view of a glass liquid flow passage heat preservation and cooling structure.

[0032] Number: 1, passage; 2, heat preservation layer; 3, pipeline; 4, first heat preservation layer; 5, second heat preservation layer; 6, third heat preservation layer; 7, fourth heat preservation layer; 8, pressure reducing valve. DETAILED DESCRIPTION

[0033] In order to further understand the content of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. It should be understood that the embodiments are only used to explain the present application but not to limit the present application.

[0034] The embodiments of the present application will be described in detail below in combination with the drawings.

[0035] Referring to Figure 1 , Figure 2 and Figure 3 , a schematic diagram of a glass liquid flow channel heat preservation and cooling structure mainly includes a channel 1 and a heat preservation layer 2, the heat preservation layer 2 includes a first heat preservation layer 4, a second heat preservation layer 5, a third heat preservation layer 6 and a fourth heat preservation layer 7, the first heat preservation layer 4, the second heat preservation layer 5, the third heat preservation layer 6 and the fourth heat preservation layer 7 are sequentially arranged on the outer periphery of the channel 1, and the first heat preservation layer 4, the second heat preservation layer 5, the third heat preservation layer 6 and the fourth heat preservation layer 7 are tightly attached to each other, the third heat preservation layer 6 is uniformly arranged with a pipeline 3 inside, and a pressure reducing valve 8 is installed on the pipeline 3.

[0036] The embodiment provides a glass liquid flow channel heat preservation and cooling structure, which aims to improve the heating and cooling efficiency of glass liquid in the flow channel, and the embodiment is described by taking the drawings as an example, and the specific implementation steps are as follows:

[0037] The channel 1 is supported by a high-temperature-resistant material, and the channel 1 is used for containing and conveying glass liquid. Four layers of heat preservation layer mechanisms are installed on the outside of the channel 1, and the four layers of heat preservation layer structures are sequentially a first heat preservation layer 4, a second heat preservation layer 5, a third heat preservation layer 6 and a fourth heat preservation layer 7. The number of heat preservation layers outside the channel 1 is not limited, but the number of heat preservation layers should be greater than or equal to 4; wherein the first heat preservation layer 4 is a filling layer, which can be polyurethane foam, the first heat preservation layer 4 is arranged between the channel 1 and the second heat preservation layer 5, and is used for ensuring that the channel 1 and the second heat preservation layer 5 are tightly filled; the second heat preservation layer 5 is made of high-temperature-resistant material, such as high-temperature-resistant asbestos board; the third heat preservation layer 6 is a secondary outer heat preservation layer, a pipeline 3 is pre-embedded in the third heat preservation layer 6, the pipeline 3 is made of high-temperature-resistant stainless steel material, such as 316L, the diameter of the pipeline 3 is 20 mm, the thickness of the pipeline 3 is 5 mm, the pipeline 3 is uniformly arranged in the third heat preservation layer 6, the spacing between the pipelines 3 is 20 cm, and the two sides of adjacent pipelines 3 are fully or partially combined according to the heating or cooling requirement; the temperature of the third heat preservation layer 6 is less than or equal to 80% of the maximum temperature that the pipeline 3 can withstand, so as to ensure that the pipeline 3 can stably operate for a long time under high temperature; a pressure reducing valve 8 is installed at the first connection position of adjacent pipelines 3, and the fluid pressure in the pipeline 3 is stabilized at about 0.5 MPa through the pressure reducing valve 8.

[0038] The installation of the pipeline 3 in the third insulation layer is divided into two kinds: when the pipeline 3 is installed on both sides of the channel, the channel 1, the first insulation layer 4 and the second insulation layer 5 are built first, the pipeline 3 is placed in the reserved space in sequence and evenly, then the remaining space of the third insulation layer 6 is filled with slurry, and finally the fourth insulation layer 7 is built; when the pipeline 3 is installed on the upper and lower sides of the channel, the first insulation layer 4, the second insulation layer 5, the fourth insulation layer 7 and the third insulation layer 6 with the reserved space of the pipeline 3 are built, the pipeline 3 is placed in the reserved space of the third insulation layer 6 in sequence, and the remaining space is filled with slurry.

[0039] When the glass liquid needs to be heated in the channel 1, low thermal conductivity gas such as argon, helium and nitrogen is injected into the pipeline 3 in the third insulation layer 6, which is low in thermal conductivity and safe, and helium is used in the embodiment, the thermal conductivity of helium is 0.15 W / (m·K), which is much lower than that of air, and the safety is higher, at the same time, the pressure reducing valve 8 is opened, when the helium passes through the pressure reducing valve 8, the input pressure fluctuates, the pressure reducing valve 8 automatically adjusts the valve opening according to the pressure fluctuation, to ensure that the pressure output to the connecting pipeline remains constant, to speed up the heating efficiency of the glass liquid in the channel 1.

[0040] When the glass liquid needs to be cooled in the channel 1, in order to speed up the cooling efficiency, the cooling circulating system is connected with the pipeline 3 in the third insulation layer 6, the cooling fluid is introduced into the pipeline 3 by the cooling circulating system, the cooling fluid can be cooling water or cooling gas, and cooling water is used as the cooling fluid in the embodiment, the cooling water passes through the pipeline 3 and the cooling circulating system, so that the cooling water can continuously cool the pipeline 3.

[0041] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand. The above is only to illustrate the technical idea of the present application, and cannot limit the protection scope of the present application, any modification made on the basis of the technical solutions according to the technical idea of the present application falls within the protection scope of the claims of the present application.

Claims

1. A heat preservation and cooling structure for a glass liquid flow channel, characterized in that: The channel structure comprises a channel (1) and a thermal insulation layer (2), wherein the thermal insulation layer (2) is arranged outside the channel (1), a pipeline (3) is pre-buried in the thermal insulation layer (2), and pressure reducing valves (8) are installed at the inlets and outlets of the pipeline (3).

2. The heat preservation and cooling structure for a molten glass flow channel according to claim 1, characterized in that: The thermal insulation layer (2) comprises a first thermal insulation layer (4), a second thermal insulation layer (5), a third thermal insulation layer (6) and a fourth thermal insulation layer (7), and the first thermal insulation layer (4), the second thermal insulation layer (5), the third thermal insulation layer (6) and the fourth thermal insulation layer (7) are tightly fitted in sequence.

3. The heat preservation and cooling structure for a molten glass flow channel according to claim 2, characterized in that: The number of thermal insulation layers in the thermal insulation layer (2) is greater than or equal to 4 layers.

4. The heat preservation and cooling structure for a molten glass flow channel according to claim 2, characterized in that: The first thermal insulation layer (4) is tightly fitted to the channel (1), and the first thermal insulation layer (4) serves as a filling layer between the channel and the second thermal insulation layer (5).

5. The heat preservation and cooling structure for a molten glass flow channel according to claim 2, characterized in that: The third thermal insulation layer (6) is a secondary outer thermal insulation layer, and a reserved space is provided inside the third thermal insulation layer.

6. The heat preservation and cooling structure for a molten glass flow channel according to claim 5, characterized in that: The pipes (3) are evenly arranged in the reserved space of the third insulation layer (6).

7. The heat preservation and cooling structure for a molten glass flow channel according to claim 6, characterized in that: The pipe (3) is tightly fixed in the third insulation layer (6) by slurry filling.

8. The heat preservation and cooling structure for a molten glass flow channel according to claim 7, characterized in that: The diameter of the pipe (3) is 10 to 30 mm, and the thickness of the pipe (3) is 3 to 8 mm.

9. The heat preservation and cooling structure for a molten glass flow channel according to claim 8, characterized in that: The temperature of the third thermal insulation layer (6) is less than or equal to 80% of the maximum temperature endured by the pipeline (3).

10. The heat preservation and cooling structure for a molten glass flow channel according to claim 8, characterized in that: The number of pipes (3) is determined according to the heating and cooling requirements of the glass liquid in the channel (1).

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