CN211886779U - Short-wave infrared high-temperature SG foam curing assembly line - Google Patents

Abstract

The utility model provides an infrared high temperature SG foam curing assembly line of shortwave, SG still remains the unoriented structure of gel attitude silicon oxide after microwave foaming shaping, silicon oxide must change the brilliant through high temperature curing in order to obtain stable crystalline phase structure, this equipment is special this research and development, make SG outer wall fire prevention heated board's main equipment, this assembly line is seen in figure 1 and is by 1 box, 2 chain belts, 3 infrared transmitting tube of shortwave, 4 temperature sensors, 5 high temperature resistant axial fan, 6 heat exchanger, 7 driving sprocket, 8 motor reducer, 9 wind channels, 10 driven sprocket is constituteed jointly.

Description

Short-wave infrared high-temperature SG foam curing assembly line

Technical Field

Solid-phase Silica gel (Silica gel), abbreviated as SG, is a special silicate material, and SG is an artificially synthesized complex composed of silicon oxide, water and metal oxide.

Background

The SG normal temperature environment is a stable solid phase, the SG starts to transfer from a solid phase to a liquid phase along with the temperature rise, and the liquid phase is transformed into the solid phase again along with the removal of the complex water in the normal pressure environment, and the process is called as 'gel-sol-gelation' in the academic world. The SG wide solid-liquid phase critical interval lays a foundation for later-stage finished product processing, and the material is specialPhysical and chemical properties and processability, so that the silicate product is an important silicate product raw material. The silicate product sequence is enriched, and the application space of the silicate product is expanded. SG, commonly known as "raw material silicon", can be foamed by microwave through "gel-sol-gel" to form lightweight silicate materials for fire protection, thermal insulation, sound absorption, and the like. The SG outer wall fireproof insulation board prepared by SG through microwave foaming has the compressive strength of 0.15MPa, the drawing strength of 0.1MPa and the volume weight of 70kg/M³－120Kg/M³The heat conductivity coefficient is between 0.032W/(m.K) -0.041W/(m.K), and the water absorption is less than or equal to 3 percent. The SG outer wall fireproof heat-insulation plate is mainly applied to building outer wall heat insulation, so that the material has the durability which is the same as the service life of a building and the weather resistance which is corresponding to the natural environment. Must withstand more than 50 years of weathering and more than 50 cycles of freeze-thaw. SG is still a non-directional structure of gel-state silicon oxide after microwave foaming and forming, and the silicon oxide material with the structure still has sol property, is not suitable for being used in high-humidity environment, especially high-temperature high-humidity environment for a long time, and cannot be subjected to the tests of weather resistance for more than 50 years and cyclic freeze-thaw for more than 50 times. Usually, in order to obtain a stable silicon oxide crystal phase structure, the SG foam material needs to be cured and transformed at a high temperature of more than 400 ℃, and the foamed SG foam material is a material with a very low heat conductivity coefficient, and a long time is needed for realizing the high temperature inside the material by heat transfer, which means that a production line is very long and the large-scale production cannot be realized.

Disclosure of Invention

A short-wave infrared high-temperature SG foam curing production line is developed for quick curing and crystal transformation of SG foamed plates and is main equipment for manufacturing SG outer wall fireproof insulation boards. The near-infrared radiation tube with good SG penetrability is selected, the wavelength of radiation light wave is between 1100nm and 1700nm, the wave band light wave has the penetrability of more than 10cm on the SG foamed sheet material, and the non-directional silicon oxide in the SG foamed sheet material can be quickly crystallized. The assembly line is shown in figure 1, figure 2, figure 3 and figure 4, and the assembly line main body is formed by connecting box bodies 1, reflects and isolates light wave radiation and keeps warm at the same time, and forms a chain belt and a short wave infrared emission tube bracket which are also part of an air duct. A bearing and flowing system composed of a chain belt 2, a driving chain wheel 7, a motor speed reducer 8, a driven chain wheel 10 and a tension wheel 11 is shown in figure 2, a radiation and reflection system composed of a short wave infrared emission tube 3, a temperature sensor 4 and a box body 1 is shown in figure 3, an automatic control system formed by a temperature control meter and a PLC is shown in figure 3, and a circulating air system formed by a high temperature resistant axial flow fan 5, a heat exchanger 6, an air duct 9 and a box body 1 is shown in figure 4.

Principle of operation

The SG foam plate formed by microwave foaming is carried by the chain belt and enters the production line from the in end of the production line. The assembly line is divided into three sections, which are respectively controlled by a temperature controller as shown in figure 3, the assembly line is divided into three sections by data from a PLC (programmable logic controller) for controlling, namely a preheating section, a curing section and a cooling section, wherein the first section is a high-temperature high-humidity section, the temperature setting temperature is 110-270 ℃, the second section is a high-temperature low-humidity section, the temperature is 270-400 ℃, and the third section is a low-temperature high-radiation section, and the temperature is controlled within 110 ℃. A circulating air system is formed by 5 high-temperature resistant axial fans, 6 heat exchangers, 9 air ducts and 1 box body, and is shown in figure 4, the circulating air system is also divided into three sections, and the direction of the circulating air is shown in figure 4. Wherein the first section of preheating section is a high-temperature and high-humidity section, and the wind speed is selected to be 0.1-0.5 m/s, so that the high-temperature and high-humidity environment is obtained to rapidly heat the interior of the SG foam plate. The second curing section selects the wind speed of 0.5m/s-1m/s to ensure that the irradiated and heated material is partially dehydrated and starts to be crystallized. The third section of cooling section selects higher wind speed of 1m/s-2m/s to make the SG foam plate in high radiation, high wind speed and low temperature environment. The SG foam plate is radiated and heated at the first section of the production line, the crystal water is fully removed at the second section, the crystal transformation is started under the strong light radiation, the third section provides the environment with high radiation, high wind speed and low temperature, the SG foam plate is thoroughly dried under the strong light radiation, and the complete crystal transformation inside and outside the SG foam plate is thoroughly completed. The upper part of the third section is provided with a heat exchanger 6 for introducing fresh air, exchanging the fresh air into hot air and condensing and recycling moisture contained in the hot air.

Drawings

FIG. 1: general assembly schematic, fig. 2: transmission schematic, fig. 3: radiant tube and temperature control schematic, fig. 4: schematic diagram of circulating wind and wind speed and direction

Detailed Description

In the practical application, 1% -3% of crystal water is intentionally reserved in the SG foaming microwave section, the crystal water is radiated in the first section SG of the curing production line, the crystal water is separated into free water, the free water is further radiated to form steam, the steam is continuously radiated to heat, and the critical action temperature of the part of crystal water is set to be 230 ℃ and the wind speed is set to be 0.25m/s when the core of the SG foam plate is heated. The wind speed of the second section of the production line is increased, the moisture is removed, the SG plate is transferred from the non-oriented silicon oxide to the crystalline phase silicon oxide, the temperature is set at 300 ℃, and the wind speed is set at 0.75 m/s. The third section provides high radiation, high wind speed and low temperature environment to ensure that the SG foam plate is thoroughly dried under strong light radiation and cured from inside to outside, and the SG foam plate is converted into crystalline phase silicon oxide from non-orientation. The temperature was set at 90 ℃ and the wind speed was set at 2 m/s.

Claims (1)

1. The utility model provides an infrared high temperature SG foam curing assembly line of shortwave, characterized by the box of joinable (1) chain belt (2), motor reducer (8), driving sprocket (7), driven sprocket (10) tight pulley (11) form assembly line power and bearing system, constitute radiation system by shortwave infrared transmitting tube (3) temperature sensor (4), form the circulated air system by high temperature resistant axial fan (5) heat exchanger (6) wind channel (9), constitute infrared high temperature SG foam curing assembly line of shortwave.

Images