Energy-saving glass fiber cotton flame blowing device

Abstract

An energy-saving glass fiber cotton flame blowing device, comprising a glass melting furnace, a bushing is arranged at the discharge port of the glass melting furnace, a blowing combustion furnace is arranged below the bushing, a gas mixer is arranged at the feeding port of the blowing combustion furnace, the flame guide sleeve outlet of the blowing combustion furnace is aligned with the cooling cotton guide sleeve inlet, a gas heat exchanger is arranged at the front end of the cooling cotton guide sleeve, the gas heat exchanger is an annular sleeve surrounding the outer wall of the front end of the cooling cotton guide sleeve, and has a gas inlet and a gas outlet, and the gas outlet is connected with the air inlet of the gas mixer. The energy-saving glass fiber cotton flame blowing device utilizes the waste heat of flame blowing to preheat the combustion-supporting air, then mixes the preheated combustion-supporting air with combustible gas, the temperature of the mixed combustible gas is increased, the combustion reaction speed is accelerated, the combustion is more rapid and complete, the combustion efficiency is improved, the cold quantity demand of secondary fiber cotton is reduced, and the amount of cooling water can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of glass fiber cotton preparation technology, specifically relating to an energy-saving glass fiber cotton flame blowing device. Background Technology

[0002] Existing technologies for preparing glass fiber cotton use a flame blowing method. In the process of preparing ultrafine glass fiber cotton felt, glass is first melted and then naturally drawn down under the gravity of a baffle to form primary fiber filaments. During the falling process, the primary fiber filaments formed by the melt are flame-blown, and then cooled into ultrafine fibers by a cooling cylinder after secondary stretching. For example, Chinese invention patent CN106868706A discloses a glass fiber cotton felt for sound insulation and heat insulation and its preparation method, which uses a similar method to prepare glass fiber cotton.

[0003] During the preparation process, the outlet temperature of the flame nozzle is around 1100 degrees Celsius. After being sprayed, the cotton enters the cotton collector through the cooling guide tube. The cotton is then collected, shaped, cured, and dried by applying an adhesive. The fuel for the flame spraying is a mixture of air and combustible gas at room temperature. A flame guide protective sleeve is used to form a directional airflow, which is sprayed in the direction of the primary fiber filament's downward movement to form a secondary stretching. After stretching, the cotton is cooled in the cotton collector tube, and after cooling, ultrafine glass fibers are obtained. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and improve energy efficiency, this utility model discloses an energy-saving glass fiber cotton flame blowing device.

[0005] The energy-saving glass fiber cotton flame blowing device of this utility model includes a glass melting furnace, a baffle plate at the outlet of the glass melting furnace, a blowing combustion furnace below the baffle plate, a gas mixer at the inlet of the blowing combustion furnace, the flame guide sleeve outlet of the blowing combustion furnace aligned with the cooling cotton guide sleeve inlet, a gas heat exchanger at the front end of the cooling cotton guide sleeve, the gas heat exchanger being an annular sleeve surrounding the outer wall of the front end of the cooling cotton guide sleeve, and having a gas inlet and a gas outlet, the gas outlet being connected to the air inlet of the gas mixer.

[0006] Preferably, the rear end of the cooling cotton sleeve, which does not have a gas heat exchanger, is wrapped with a water cooling device.

[0007] Preferably, the gas inlet of the gas heat exchanger is equipped with a booster pump.

[0008] Preferably, the cooling cotton guide sleeve is trumpet-shaped, with the smaller opening facing the flame guide sleeve and a cotton collection cylinder provided at the larger opening.

[0009] Preferably, the cooling cotton sleeve is divided into two detachable sections, wherein the gas heat exchanger is provided on the outside of the first section, and the water cooling device is wrapped on the outside of the second section, and the two sections are connected by a flange or bolts.

[0010] The energy-saving glass fiber cotton flame blowing device described in this utility model uses the residual heat of the flame blowing to preheat the combustion air before mixing it with the combustible gas. The temperature of the mixed combustible gas increases, which accelerates the combustion reaction speed, making the combustion faster and more complete, thus improving the combustion efficiency. At the same time, it reduces the cooling requirement of the secondary fiber cotton, which can reduce the amount of cooling water used. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a specific embodiment of the energy-saving glass fiber cotton flame blowing device of this utility model; The attached figures are labeled as follows: 1-Pulse-fired combustion furnace, 2-Glass melting furnace, 3-Gas mixer, 4-Gas heat exchanger, 5-Water cooling device, 6-Collection tube, 7-Primary glass fiber filament, 8-Screw plate, 9-Boosting air pump. Detailed Implementation

[0012] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0013] like Figure 1 As shown, the energy-saving glass fiber cotton flame blowing device of this utility model includes a glass melting furnace 2, a baffle plate 8 is provided at the outlet of the glass melting furnace, a blowing combustion furnace 1 is provided below the baffle plate 8, a gas mixer 3 is provided at the inlet of the blowing combustion furnace 1, the flame guide sleeve outlet of the blowing combustion furnace 1 is aligned with the cooling cotton guide sleeve inlet, a gas heat exchanger 4 is provided at the front end of the cooling cotton guide sleeve, the gas heat exchanger 4 is an annular sleeve surrounding the outer wall of the front end of the cooling cotton guide sleeve, and has a gas inlet and a gas outlet, the gas outlet is connected to the air inlet of the gas mixer.

[0014] After the glass raw material is heated and melted in the glass melting furnace, it falls naturally in a liquid state through the perforator 8 under the action of gravity, forming relatively fine primary glass fiber filaments 7. The falling speed is relatively slow, and the ends have a large mass. The large mass of the ends drags the primary glass fiber filaments slowly down through the flame guide sleeve outlet. The flame guide sleeve is a conical gas guide sleeve set at the outlet of the injection combustion furnace 1, which allows the high-temperature gas generated by the combustion in the injection combustion furnace 1 to blow the primary glass fiber filaments 7 at the outlet of the flame guide sleeve. During the blowing process, the primary glass fiber filaments are stretched by the wind towards the cooling guide sleeve. As they are blown into the cooling guide sleeve by the flame, their diameter is further thinned to form secondary glass fiber filaments. The flame blowing can keep the primary glass fiber filaments in a deformable semi-liquid state, and they can be stretched again during the blowing process to reduce their diameter. The secondary glass fiber filaments, after being stretched by the flame blowing, finally enter the cotton collection cylinder at the end of the cooling guide sleeve and are collected by the cotton collection cylinder.

[0015] The cooling cotton guide sleeve is generally designed in a trumpet shape, which is smaller at the front and larger at the back. This slows down the airflow and gradually increases the heat dissipation surface, which is beneficial for heat dissipation. A gas heat exchanger is installed on the front end. The cooling cotton guide sleeve is generally made of metal material with good thermal conductivity. The gas heat exchanger is an annular sleeve that surrounds the outer wall of the front end of the cooling cotton guide sleeve. When air at room temperature enters the gas heat exchanger, it is heated while the interior of the front end of the cooling cotton guide sleeve is cooled. The heated air enters the injection combustion furnace 1 through a pipe and mixes with the combustible gas to serve as the gas combustion raw material for the injection combustion furnace. This increases the initial temperature of the mixed gas, which is beneficial for improving combustion efficiency.

[0016] Compared to existing technologies that directly utilize cold air, the combustion mixture temperature is low and the combustion reaction rate is slow. To ensure complete combustion of fuel, sufficient space and time must be provided; otherwise, unburned carbon particles, black smoke, or carbon monoxide are easily produced, resulting in energy loss. After the air is preheated, it is preheated again using a secondary injection port, carrying its own physical heat. This heat is contributed to the combustion process, meaning that less fuel can be used to heat the mixture to a higher temperature, thereby significantly increasing the theoretical combustion temperature.

[0017] In one preferred embodiment, the gas inlet of the gas heat exchanger is equipped with a booster pump 9, which makes the gas entering the gas heat exchanger a high-pressure gas. This accelerates the airflow speed and increases the pressure of the combustion air entering the injection combustion furnace, thereby reducing the risk of explosion when mixed with combustible gases such as coal gas.

[0018] Since air cooling alone is insufficient to complete cooling after the cotton guide sleeve has finished its stroke, the rear end of the cooling cotton guide sleeve, which is not equipped with a gas heat exchanger 4, is usually wrapped with a water cooling device 5. The cooling effect of the water cooling device is significantly better than that of air cooling, which allows the secondary glass fiber filaments to cool down quickly and settle and be collected in the cotton collection cylinder.

[0019] The cooling cotton guide sleeve can be configured as two detachable sections. The first section is equipped with the gas heat exchanger 4, and the second section is wrapped with a water cooling device 5. The two sections are connected by flanges or bolts. The two-section design facilitates the separate installation of air-cooled and water-cooled pipelines, and allows for separate replacement and maintenance. It also facilitates cleaning of the central part of the cotton guide sleeve when not in production.

[0020] The energy-saving glass fiber cotton flame blowing device described in this utility model uses the residual heat of the flame blowing to preheat the combustion air before mixing it with the combustible gas. The temperature of the mixed combustible gas increases, which accelerates the combustion reaction speed, making the combustion faster and more complete, thus improving the combustion efficiency. At the same time, it reduces the cooling requirement of the secondary fiber cotton, which can reduce the amount of cooling water used.

[0021] The foregoing descriptions are preferred embodiments of this utility model. Unless there is a clear contradiction between the preferred embodiments or a prerequisite for a particular preferred embodiment, the preferred embodiments can be arbitrarily combined and used. The embodiments and specific parameters described are only for clearly illustrating the utility model verification process of the inventor and are not intended to limit the patent protection scope of this utility model. The patent protection scope of this utility model is still subject to its claims. Similarly, any equivalent structural changes made based on the description and drawings of this utility model should also be included within the protection scope of this utility model.

Claims

1. An energy-saving glass fiber cotton flame blowing device, comprising a glass melting furnace (2), wherein a baffle plate (8) is provided at the outlet of the glass melting furnace (2), and a blowing combustion furnace (1) is provided below the baffle plate; a gas mixer (3) is provided at the inlet of the blowing combustion furnace; and the outlet of the flame guide sleeve of the blowing combustion furnace is aligned with the inlet of the cooling cotton guide sleeve, characterized in that, The cooling cotton guide sleeve is provided with a gas heat exchanger (4) at the front end. The gas heat exchanger is an annular sleeve surrounding the outer wall of the front end of the cooling cotton guide sleeve, and has a gas inlet and a gas outlet. The gas outlet is connected to the air inlet of the gas mixer (3).

2. The energy-saving glass fiber wool flame blowing device as described in claim 1, characterized in that, The cooling cotton sleeve without a gas heat exchanger is wrapped with a water cooling device (5) at its rear end.

3. The energy-saving glass fiber wool flame blowing device as described in claim 1, characterized in that, The gas inlet of the gas heat exchanger is equipped with a booster pump (9).

4. The energy-saving glass fiber wool flame blowing device as described in claim 1, characterized in that, The cooling cotton guide sleeve is trumpet-shaped, with the small opening facing the flame guide sleeve and a cotton collection cylinder (6) provided at the large opening.

5. The energy-saving glass fiber wool flame blowing device as described in claim 1, characterized in that, The cooling cotton sleeve is divided into two detachable sections. The first section is equipped with the gas heat exchanger (4), and the second section is wrapped with a water cooling device (5). The two sections are connected by a flange or bolts.

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