Continuous production apparatus
Patent Information
- Application Number
- CN202521078884.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-05-28
AI Technical Summary
[0004]本实用新型的主要目的是提出一种连续生产装置，旨在解决现有技术中在解决传统常压反应釜设备生产难以连续化以及提高改性温度后存在的容器内压力升高、安全系数降低的问题
[0010] In this invention, a tunnel-type automatic depressurization continuous production device is used to achieve continuous atmospheric pressure production of aerogel insulation composite materials. This overcomes the intermittent drawbacks of traditional reactor-type aerogel composite material preparation processes, which require repeated opening and closing of the reactor. This significantly increases the aerogel composite material production capacity per unit time, saves on manual operation, reduces energy consumption, and improves process safety. For traditional closed atmospheric pressure production devices, during the heating and modification process, the evaporation of the modifying liquid creates a continuously increasing vapor pressure within the modification container. When the pressure exceeds the container's maximum allowable working pressure, the reactor or other containers may rupture or explode. This could cause volatile substances or vapors inside the container to impact and injure operators, resulting in unnecessary losses. In the technical solution of this utility model, by using a condensation reflux device equipped with a condensation reflux pipeline, when the modification temperature is increased, excess steam in the container can be circulated back into the tunnel through the condensation device, ensuring that a low pressure level is maintained after the temperature increase modification process. This overcomes the dependence of pressure on temperature in traditional reactors and effectively solves the problem of pressure increase. At the same time, the modified liquid circulated back into the tunnel can participate in the next modification process. Thus, only a certain amount of modifier solution needs to be added to make the modification process continue, greatly reducing the amount of solvent consumed and lowering production costs.
Smart Images
Figure CN224641046U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aerogel preparation technology, and in particular to a continuous production apparatus. Background Technology
[0002] Silica aerogel is a lightweight, porous, three-dimensional network structure, emerging thermal insulation material. Due to its excellent properties such as extremely low thermal conductivity, low density, high porosity, and high specific surface area, silica aerogel has broad applications in aerospace, building insulation, petrochemicals, and new energy fields. However, pure silica aerogel is prone to breakage and deformation under relatively low pressure, which limits its widespread application in thermal insulation. More durable aerogels with higher strength and toughness can be compounded with fiber reinforcements or reinforcing materials such as short fibers, whiskers, and carbon nanotubes to create aerogel felts / blocks with improved mechanical properties. Among these, fiber reinforcements commonly used are glass fibers, aramid fibers, and mullite fibers.
[0003] Modification and drying are the most critical steps in the preparation of aerogels. However, even with improvements, traditional reaction vessel equipment still suffers from low capacity per unit time and limited levels of automation and continuous production. Utility Model Content
[0004] The main purpose of this invention is to propose a continuous production device, which aims to solve the problems in the prior art of making it difficult to achieve continuous production in traditional atmospheric pressure reactor equipment and the problems of increased pressure and reduced safety factor in the container after increasing the modification temperature.
[0005] To achieve the above objectives, this utility model proposes a continuous production device, comprising a U-shaped tunnel box with openings at both ends, a heating device, and a condensation reflux device, wherein the heating device and the condensation reflux device are both connected to the U-shaped tunnel box.
[0006] In some embodiments, the U-shaped tunnel box includes a horizontal tunnel section and an inlet tunnel section and an outlet tunnel section respectively connected to both ends of the horizontal tunnel section, wherein the inlet tunnel section and the outlet tunnel section are set at a preset angle to the horizontal tunnel section.
[0007] In some embodiments, the heating device is arranged along the horizontal section of the tunnel, and / or the heating device is arranged at the lower part of the U-shaped tunnel box, and the condensation reflux device is arranged at the upper part of the U-shaped tunnel box.
[0008] In some embodiments, the condensation reflux device includes a U-shaped pipe, and a condensation medium flow cavity is provided on the outer side of a portion of the pipe wall; the condensation medium flow cavity is connected to a condensation medium supply device.
[0009] In some embodiments, the condensation reflux device includes a condensation section pipe parallel to the horizontal tunnel section and a steam collection reflux section pipe connected to both ends of the condensation section pipe; the steam collection reflux section pipe is set at a preset angle to the condensation section pipe; and the steam collection reflux section pipe is connected to the upper surface of the horizontal tunnel section.
[0010] In this invention, a tunnel-type automatic depressurization continuous production device is used to achieve continuous atmospheric pressure production of aerogel insulation composite materials. This overcomes the intermittent drawbacks of traditional reactor-type aerogel composite material preparation processes, which require repeated opening and closing of the reactor. This significantly increases the aerogel composite material production capacity per unit time, saves on manual operation, reduces energy consumption, and improves process safety. For traditional closed atmospheric pressure production devices, during the heating and modification process, the evaporation of the modifying liquid creates a continuously increasing vapor pressure within the modification container. When the pressure exceeds the container's maximum allowable working pressure, the reactor or other containers may rupture or explode. This could cause volatile substances or vapors inside the container to impact and injure operators, resulting in unnecessary losses. In the technical solution of this utility model, by using a condensation reflux device equipped with a condensation reflux pipeline, when the modification temperature is increased, excess steam in the container can be circulated back into the tunnel through the condensation device, ensuring that a low pressure level is maintained after the temperature increase modification process. This overcomes the dependence of pressure on temperature in traditional reactors and effectively solves the problem of pressure increase. At the same time, the modified liquid circulated back into the tunnel can participate in the next modification process. Thus, only a certain amount of modifier solution needs to be added to make the modification process continue, greatly reducing the amount of solvent consumed and lowering production costs. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 structures shown in these drawings without creative effort.
[0012] Figure 1 This is a front view of the continuous production apparatus provided in an embodiment of the present utility model;
[0013] Figure 2 This is a cross-sectional view of a continuous production apparatus provided in an embodiment of the present invention.
[0014] Explanation of reference numerals in the attached figures:
[0015] 100 - Continuous production unit; 1 - U-shaped tunnel box; 2 - Heating device; 3 - Condensation reflux device; 11 - Horizontal section tunnel; 12 - Inlet section tunnel; 13 - Outlet section tunnel; 31 - Condensate flow cavity; 32 - Steam collection reflux section pipeline.
[0016] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0018] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0019] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0020] Currently, the development of new energy sources, the improvement of existing energy utilization rates, and energy conservation have attracted great attention from all countries. The rational use and conservation of energy are of great significance to the sustainable development of Chinese society. Developing environmentally friendly thermal insulation materials using new technologies and processes is one of the most effective and economical measures for energy conservation.
[0021] Silica aerogel is a lightweight, porous, three-dimensional network structure, emerging thermal insulation material. Due to its excellent properties such as extremely low thermal conductivity, low density, high porosity, and high specific surface area, silica aerogel has broad applications in aerospace, building insulation, petrochemicals, and new energy fields. However, pure silica aerogel is prone to breakage and deformation under relatively low pressure, which limits its widespread application in thermal insulation. More durable aerogels with higher strength and toughness can be compounded with fiber reinforcements or reinforcing materials such as short fibers, whiskers, and carbon nanotubes to create aerogel felts / blocks with improved mechanical properties. Among these, fiber reinforcements commonly used are glass fibers, aramid fibers, and mullite fibers.
[0022] Modification and drying are the most critical steps in the preparation of aerogels. Currently, the commonly accepted drying processes for silica aerogels include supercritical drying, freeze-drying, and atmospheric pressure drying. Among these, atmospheric pressure drying, due to its mild conditions and simple equipment, is the main research and development direction for achieving low-cost, continuous, and large-scale production of silica aerogels. Traditional atmospheric pressure drying methods are simple and require minimal equipment, but they also have drawbacks such as long preparation cycles, large volume shrinkage, and the consumption of large amounts of organic solvents and modifiers. Existing technologies use a reaction vessel to modify aerogels. This reaction vessel includes a reaction chamber and multiple ultrasonic transducer groups spaced circumferentially. The aged wet aerogel composite material is placed in the reaction chamber, and a silsesquioxane solution and an acid solution are added for annular ultrasonic cavitation treatment, causing emulsification and reaction, thereby obtaining the final aerogel composite material. This novel modification method offers fast modification speed, produces high-quality silica aerogel thermal insulation composite materials, and significantly reduces solvent consumption, thus lowering production costs.
[0023] However, traditional reaction vessel equipment still has problems such as low production capacity per unit time, low degree of automation and continuous production during the improvement process. The reaction environment is a closed cavity and the reaction vessel can only produce a limited amount of aerogel thermal insulation composite material once it is opened and closed, which is not conducive to promoting the large-scale and industrial application of silica aerogel composite material.
[0024] In view of this, see Figure 1-2 This utility model embodiment proposes a continuous production device 100, including a U-shaped tunnel box with openings at both ends, a heating device 2, and a condensation reflux device 3, wherein the heating device 2 and the condensation reflux device 3 are both connected to the U-shaped tunnel box.
[0025] In some embodiments, the U-shaped tunnel box includes a horizontal tunnel section 11 and an inlet tunnel section 12 and an outlet tunnel section 13 connected to both ends of the horizontal tunnel section 11, respectively. The inlet tunnel section 12 and the outlet tunnel section 13 are set at a preset angle to the horizontal tunnel section 11.
[0026] In some embodiments, the heating device 2 is arranged along the horizontal section of the tunnel 11, and / or the heating device 2 is arranged at the lower part of the U-shaped tunnel box, and the condensation reflux device 3 is arranged at the upper part of the U-shaped tunnel box.
[0027] In some embodiments, the condensation reflux device 3 includes a U-shaped pipe, and a condensation medium flow cavity 31 is provided on the outer side of a portion of the pipe wall of the U-shaped pipe; the condensation medium flow cavity 31 is connected to a condensation medium supply device.
[0028] In some embodiments, the condensation reflux device 3 includes a condensation section pipe parallel to the horizontal tunnel 11 and a steam collection reflux section pipe 32 connected to both ends of the condensation section pipe; the steam collection reflux section pipe 32 is set at a preset angle to the condensation section pipe; the steam collection reflux section pipe 32 is connected to the upper surface of the horizontal tunnel 11.
[0029] In this invention, a tunnel-type automatic depressurization continuous production device is used to achieve continuous atmospheric pressure production of aerogel insulation composite materials. This overcomes the intermittent drawbacks of traditional reactor-type aerogel composite material preparation processes, which require repeated opening and closing of the reactor. This significantly increases the aerogel composite material production capacity per unit time, saves on manual operation, reduces energy consumption, and improves process safety. For traditional closed atmospheric pressure production devices, during the heating and modification process, the evaporation of the modifying liquid creates a continuously increasing vapor pressure inside the modification container. When the pressure exceeds the container's maximum allowable working pressure, the container may rupture or explode. This could cause volatile substances or vapors inside the container to impact and injure operators, resulting in unnecessary losses. In the technical solution of this utility model, by using a condensation reflux device equipped with a condensation reflux pipeline, when the modification temperature is increased, excess steam in the container can be circulated back into the tunnel through the condensation device, ensuring that a low pressure level is maintained after the temperature increase modification process. This overcomes the dependence of pressure on temperature in traditional reactors and effectively solves the problem of pressure increase. At the same time, the modified liquid circulated back into the tunnel can participate in the next modification process. Thus, only a certain amount of modifier solution needs to be added to make the modification process continue, greatly reducing the amount of solvent consumed and lowering production costs.
[0030] As an example, the continuous production apparatus provided in this embodiment of the invention can be used to prepare silica aerogel thermal insulation composite materials under normal pressure. This preparation under normal pressure may include the following steps:
[0031] Step S1, provide a continuous production device, the continuous production device includes a U-shaped tunnel box with openings at both ends, a heating device, and a condensation reflux device, the heating device and the condensation reflux device are both connected to the U-shaped tunnel box;
[0032] Step S2, providing a wet gel composite material after replacement with an acidic mixture;
[0033] Step S3: Add the modifier and the wet gel composite material into the U-shaped tunnel box, and control the heating device and the condensation reflux device to start working, so as to carry out the modification treatment on the wet gel composite material.
[0034] Step S4: Dry the modified wet gel composite material to obtain a silica aerogel thermal insulation composite material.
[0035] In some embodiments, the step of providing the wet gel composite material after acidic mixture displacement includes,
[0036] A mixture of silicon source, water and alcohol is obtained, and acid is added to perform acidification treatment to obtain a sol solution.
[0037] After adjusting the pH of the sol solution to 3-9 with an alkaline aqueous solution, fiber reinforcement was added, the solution was allowed to stand and gel, and then aged to obtain a wet gel composite material.
[0038] The wet gel composite material is immersed in an acidic mixed solution for solvent replacement to obtain the wet gel composite material after acidic mixed solution replacement.
[0039] In some embodiments, the acidic mixture includes one or more of hydrochloric acid, hydrofluoric acid, hydrobromic acid, sulfuric acid, phosphoric acid, nitric acid, oxalic acid, glacial acetic acid, and p-toluenesulfonic acid, and the concentration of the acidic mixture is 0.01 to 32.5 mol / L.
[0040] The silicon source includes an organosilicon source and / or an inorganic silicon source; the organosilicon source includes at least one of tetraethyl orthosilicate, tetramethyl orthosilicate, tetrabutyl orthosilicate, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, polysiloxane, 3-[2-(2-aminoethylamino)ethylamino]propyltrimethoxysilane, and n-octyltriethoxysilane; the inorganic silicon source includes one or more of water glass solution and silicon tetrachloride; preferably, the polysiloxane is polydimethylsiloxane or polydiethylsiloxane; preferably, the water glass solution has a water glass mass fraction of 26-46% and a modulus of 2.1-4.8.
[0041] In the step of mixing a silicon source, water, and alcohol to obtain a mixture, adding acid, and then acidifying to obtain a sol solution, the alcohol includes one or more of methanol, ethanol, propanol, isopropanol, butanol, isobutanol, ethylene glycol, propylene glycol, diethylene glycol, butanediol, diacetone alcohol, glycerol, and diethylene glycol. The acid includes one or more of hydrochloric acid, hydrofluoric acid, hydrobromic acid, sulfuric acid, phosphoric acid, nitric acid, oxalic acid, and glacial acetic acid, and the concentration of the acid is 0.01–29.8 mol / L; the volume ratio of the mixture to the acid is (1–24):1. The acidification temperature is 10–70°C, and the acidification time is 0.1–50 min.
[0042] In the step of adjusting the pH of the sol solution to 3-9 with an alkaline aqueous solution, adding the fiber reinforcement, allowing it to gel statically, and then subjecting it to aging treatment to obtain the wet gel composite material, the static gelation time is 0.01-180 min; the aging treatment time is 2-10 h. The solute in the alkaline aqueous solution includes one or more of ammonia, sodium carbonate, sodium bicarbonate, sodium hydroxide, potassium carbonate, or sodium silicate, and the concentration of the alkaline aqueous solution is 0.01-8 mol / L.
[0043] The fiber reinforcement is any one of high-silica fibers, quartz fibers, aluminosilicate fibers, alumina fibers, and mullite fibers. Ceramic fiber bodies refer to ceramic fiber needle-punched felt or molded fiber preforms purchased directly from the market.
[0044] In some embodiments, the step of adding the modifier and the wet gel composite material into the U-shaped tunnel box, controlling the heating device and the condensation reflux device to operate, and modifying the wet gel composite material is described.
[0045] The modifier includes one or more of methyltrimethoxysilane, methyltriethoxysilane, ethyltriethoxysilane, trimethylchlorosilane, phenyltriethoxysilane, dimethyldichlorosilane, trimethylethoxysilane, trimethylbromosilane, trimethoxysilane, tetramethylsilane, dimethyldimethoxysilane, dimethyldiethoxysilane, hexamethyldisiloxane, bis(trimethylsilyl)acetamide, and hexamethyldisilazane. The heating temperature is 60–150°C. The modification treatment time is 2–8 hours.
[0046] In some embodiments, in the step of drying the modified wet gel composite material to obtain a silica aerogel thermal insulation composite material, the drying temperature is 80–200°C, and the drying time is 2–12 hours. The drying process can be carried out in an oven.
[0047] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A continuous production apparatus, characterized in that, It includes a U-shaped tunnel box with openings at both ends, a heating device, and a condensation reflux device, wherein the heating device and the condensation reflux device are both connected to the U-shaped tunnel box; The U-shaped tunnel box includes a horizontal tunnel section and an inlet tunnel section and an outlet tunnel section respectively connected to both ends of the horizontal tunnel section. The inlet tunnel section and the outlet tunnel section are set at a preset angle to the horizontal tunnel section. The condensation reflux device includes a condensation section pipe parallel to the horizontal tunnel section and a steam collection reflux section pipe connected to both ends of the condensation section pipe; the steam collection reflux section pipe is connected to the upper surface of the horizontal tunnel section.
2. The continuous production apparatus according to claim 1, characterized in that, The heating device is installed along the horizontal section of the tunnel.
3. The continuous production apparatus according to claim 1, characterized in that, The heating device is located at the lower part of the U-shaped tunnel box, and the condensation reflux device is located at the upper part of the U-shaped tunnel box.
4. The continuous production apparatus according to claim 1, characterized in that, The condensation reflux device includes a U-shaped pipe, and a condensation medium flow cavity is provided on the outer side of a portion of the pipe wall; the condensation medium flow cavity is connected to a condensation medium supply device.
5. The continuous production apparatus according to claim 1, characterized in that, The steam collection and return section pipe and the condensation section pipe are set at a preset angle.