CN108854130B - Glass lining distillation still - Google Patents
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- CN108854130B CN108854130B CN201810729389.1A CN201810729389A CN108854130B CN 108854130 B CN108854130 B CN 108854130B CN 201810729389 A CN201810729389 A CN 201810729389A CN 108854130 B CN108854130 B CN 108854130B
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- C09D163/10—Epoxy resins modified by unsaturated compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/02—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in boilers or stills
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- C—CHEMISTRY; METALLURGY
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- C08K3/34—Silicon-containing compounds
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
Abstract
The invention discloses a glass-lined distillation still, which comprises a shell, a steam inlet and a feed inlet, wherein the shell is sequentially provided with an enamel layer, a stainless steel lining, a heat conduction layer and a stainless steel outer lining from inside to outside, the steam inlet is provided with a plurality of flow guide elements for regulating air flow, the part of the lower part of the feed inlet, which is close to the shell, is inwards concave to form a dispersing part, and the dispersing part is used for dispersing and atomizing materials entering the still. Through improving feed inlet and steam inlet, reduced the impact strength of material to the glaze layer and the thermal shock that steam caused the stainless steel inside lining respectively, make the glaze layer be difficult for by impact damage and thermally equivalent, reduced the internal stress that the glaze layer produced by a wide margin, its porcelain explosion incidence obtains effective control, maintenance and running cost have been reduced, and simultaneously, through the surface coating one deck heat conduction coating at the stainless steel inside lining, it has not only strengthened the mechanical properties and the corrosion resistance of stainless steel inside lining, still further guaranteed the thermally equivalent on glaze layer, make porcelain explosion rate fall to minimumly.
Description
The present application is a divisional application of patent with application number 2016108139172, application date 2016, 09 and 09, entitled "a glass lining distillation still".
Technical Field
The invention relates to the field of chemical mechanical equipment, in particular to a glass-lined distillation still.
Background
A glass lining distillation still is used as a still used in distillation in chemical production and is designed for solving the problem that the materials need to be intermittently overhauled and cleaned when the materials contain solid substances and high-boiling-point substances in the production process. The distillation still comprises a distillation still shell, an upper end enclosure is arranged above the distillation still shell, a gas outlet is arranged on the upper end enclosure, a demister is arranged below the upper end enclosure, a storage chamber is arranged below the demister, a feed inlet is arranged at the upper part of the storage chamber, an indoor evaporator is arranged, a solid and high-boiling-point substance settling chamber is arranged at the lower part of the distillation still, a stirrer is arranged in the settling chamber, a stirrer shaft is connected with an external motor through a shaft seal, and a solid and high-boiling-point substance discharge port is arranged at the bottom of the distillation still.
In the use, the main factor that influences glass lining stills life is the enamel layer on the stainless steel inside lining, and its main destruction form is porcelain explosion, because glass lining stills are very sensitive to temperature, material and mechanical power, slightly misoperation or technology control are improper, all can cause the enamel layer to destroy, according to incomplete statistics, in glass lining stills life, its destruction condition and proportion are as follows: the tank body accounts for 36 percent, the liquid outlet accounts for 14 percent, the large flange accounts for 7.9 percent, the tank cover accounts for 6.65 percent, the tank body deformation accounts for 3.22 percent, and the stirring thermometer tube accounts for 3.22 percent. Therefore, how to reduce the damage rate of the can body is a topic worthy of study.
Through analyzing damaged parts of a pot body, the impact force of materials and the impact force of steam are not noticed in the existing glass-lined distillation kettle, namely, the existing feeding mode is that the materials are directly transferred into the distillation kettle from a feeding hole, even if the distillation kettle is smooth and flat, and the bottom of the distillation kettle is in circular arc transition, the impact force of the materials is large, so that large impact load is still caused to the bottom of the distillation kettle, although the impact load is within the bearing range of an enamel layer, after several impacts, the fatigue resistance strength of the enamel layer is reduced, so that the strength is reduced and the crack tendency begins to appear, when the strength is reduced to a certain critical value, a dark crack is generated in the enamel layer, and after the impacts are continuously carried out, the dark crack in the enamel layer is developed into a bright crack, so that the porcelain explosion phenomenon is caused; when high-temperature steam is introduced into an interlayer of the distillation kettle through a steam inlet, the high-temperature steam often directly causes local thermal shock to the stainless steel lining, local high temperature is generated due to sudden temperature rise and the stainless steel lining is not easy to uniformly radiate, the generation of local high temperature causes different thermal expansion coefficients of all parts of the stainless steel lining to generate larger thermal stress, and therefore the glaze layer is further promoted to generate larger stress, the stress is continuously amplified after the steam is introduced for a plurality of times, and the glaze layer is damaged after exceeding the allowable stress. In view of the above, in some glass-lined stills, the steam inlet is provided with a steam baffle to reduce the impact force of steam, and the mode plays a certain role, but the mode is not only unfavorable for the steam to fill the interlayer rapidly to eliminate uneven heating, but also has higher requirements on the material and installation of the steam baffle, has single function and inconvenient use, still cannot effectively solve the practical problem, and has poorer adaptability.
In addition, the existing glass lining distillation still only focuses on corrosion prevention of a glass lining layer in the still, corrosion prevention of a stainless steel lining is not considered, hydrogen corrosion often occurs on the surface of stainless steel under high-temperature steam to generate white spots, the white spots provide crack sources for cracks, the cracks are the root cause of the cracking of the stainless steel lining, and although the cracking probability of the stainless steel lining is very small, once the cracks occur, huge harm is caused.
Disclosure of Invention
The invention aims to: in view of the problems, the glass lining distillation still is provided, and the problems are solved by improving the feed inlet and the steam inlet and coating a layer of heat-conducting coating on the surface of the stainless steel lining.
The technical scheme adopted by the invention is as follows: the utility model provides a glass-lined distillation still, includes casing, steam inlet and feed inlet, and the casing is equipped with enamel layer, stainless steel inside lining, heat-conducting layer and stainless steel outer lining from inside to outside in proper order and constitutes, and steam inlet department is equipped with a plurality of guiding elements that are used for adjusting the air current, and the part that the feed inlet lower part is close to the casing is concave to form into the portion of dispersing, and the portion of dispersing is used for dispersing the material that gets into in the cauldron and atomizes.
Due to the arrangement of the structure, the heat conduction layer is arranged on the surface of the stainless steel lining, namely the heat conduction coating is coated on the surface of the stainless steel lining, which is not coated with the glaze layer, so that on one hand, the heat conduction coating can protect the stainless steel lining from thermal shock, the corrosion resistance of the stainless steel lining can be greatly improved, the influence of cracking of the stainless steel lining can be completely eliminated, meanwhile, the stainless steel lining can be promoted to be uniformly heated, and the thermal stress generated by the stainless steel lining can be effectively reduced; the steam inlet is provided with a flow guide element which is mainly used for changing the impact direction of steam entering the interlayer of the distillation kettle and enabling the steam to exchange heat with the stainless steel lining in the tangential direction, so that the thermal shock of the steam to the stainless steel lining can be greatly eliminated, meanwhile, because the impact load of the steam is not obviously reduced, the steam with larger impact force is beneficial to being quickly filled in the interlayer and exchanging heat with the stainless steel lining, the non-uniform heating of the stainless steel lining is further eliminated, the stress generated by the enamel layer is reduced, and the probability of porcelain explosion of the enamel layer can be further reduced; in addition, the flow, distribution and impact force of the steam can be adjusted simultaneously by introducing the flow guide element, so that the steam can be more suitable for the requirements of specific conditions, and compared with a gas valve for controlling the steam flow, the flow guide element has the advantages of more abundant functions, more convenience in operation, installation and maintenance and stronger practicability; set up the portion of dispersing at the feed inlet, mainly be in order to make the material decentralization, make the impact force that gets into the material in the cauldron become the dispersion by concentrating, and then reduced impact strength, can effectively reduce the influence that the material impact brought, further reduce the impaired probability of enamel layer.
Furthermore, in order to better implement the diverging part of the invention, the diverging part comprises a lip and a skirt part, the pipe wall at the lower part of the feed inlet is inwards concave to form the lip, the feed inlet is connected with the shell to form an opening of the shell, the lip extends outwards along the outer edge of the opening of the shell to form the skirt part, and the lip and the skirt part are of a V-shaped structure which is integrally formed into the diverging part. The material is when the process lip, because the pipe wall bore reduces suddenly, extrude each other and form pressure between the material, after reacing skirt portion through the lip, because the pipe wall bore increases suddenly, pressure between the material is released in an instant, cause originally mutual extruded material to be evacuated and open, form fluffy material, when fluffy material gets into in the cauldron through the casing opening, casing open-ended edge oppresses the material, cause the material to take place the dispersion, wherein some material takes place the atomizing even, the material that finally makes to get into in the cauldron is comparatively dispersed, the impact energy that its carried is lower, influence to the glaze layer is less.
Further, considering that the scattering portion is abraded by a large frictional force generated between the scattering portion and the material, the inner surface of the scattering portion is provided with a polytetrafluoroethylene layer, and abrasion of the scattering portion can be greatly reduced by the polytetrafluoroethylene layer, and further, the thickness of the polytetrafluoroethylene layer is 50 to 150 μm, preferably 120 μm.
Further, in order to enable the heat conduction layer to be better implemented, the heat conduction layer is coated by a heat conduction coating, and the heat conduction coating is composed of the following raw materials in parts by weight: 34-39 parts of vinyl resin, 1-3 parts of modified graphene, 10-12 parts of asphalt carbon fiber yarns, 6-8 parts of mica powder, 5-7 parts of rare earth composite oxide powder, 18-30 parts of butyl acetate, 0.5-1 part of fumed silica, 1-1.5 parts of a dispersing agent and 0.5-1 part of a leveling agent, wherein the rare earth composite oxide powder is selected from one or more of La0.7Sr0.3Fe0.8Ni0.2O3, Sr0.8Dy0.2CoO2.6, La0.7Sr0.3Co0.9Cu0.1O3 and La0.4Sr0.6Co0.9Cu0.1O3, and preferably La0.4Sr0.6Co0.9Cu0.1O3.
In the formula, the graphene has excellent performances such as toughness, breaking strength and the like, and is added into the coating, so that the graphene has high compactness and can block the permeation of hydrogen atoms, the hydrogen atoms cannot penetrate through the heat-conducting coating, and the corrosion of the hydrogen atoms on the stainless steel lining is further prevented; the fumed silica is used as an anti-settling agent in the embodiment, and the fluffy powdery and porous fumed silica can effectively improve the suspension property of the filler in the coating, prevent the occurrence of the delamination phenomenon and keep the coating to have good stability; the rare earth composite oxide has excellent oxidation-reduction catalytic performance, is generally used in the field of fuel cells, is added as a hydrogen-blocking substance in the invention, can effectively prevent hydrogen atoms and hydrogen atoms in the heat-conducting coating from permeating into a stainless steel lining by utilizing the excellent hydrogen evolution performance of the rare earth composite oxide, can effectively stop the invasion of the hydrogen atoms by matching with the action of graphene, and further completely eliminates the problem of the breakage of the stainless steel lining. The heat-conducting coating prepared from the raw materials has good heat conduction, flexibility and stability, is not easy to crack, wrinkle, crack and the like when being stretched, compressed, expanded with heat and contracted with cold, has extremely low compression deformation rate, is not easy to fall off after being cured, and has strong corrosion resistance.
Further, in order to enhance the bonding strength of the interface between the graphene and other organic components, the graphene needs to be modified, the thickness of the modified graphene is 10-20nm, and the preparation method comprises the following steps: mixing graphene with the thickness of 10-20nm and absolute ethyl alcohol according to the mass ratio of 1: 80, then adding 0.6 wt% of silane coupling agent, stirring uniformly, then putting the mixture into an ultrasonic emulsification disperser for full dispersion, finally taking out the mixture and putting the mixture into a drying oven for drying, thus obtaining the product.
Further, the preparation and use method of the heat-conducting coating comprises the following steps:
step 1, adding vinyl resin and a dispersing agent into a reactor, and then stirring the mixed components by a stirrer at the rotating speed of 800r/min until the components are uniformly dispersed to obtain a base material;
step 2, sequentially adding asphalt carbon fiber filaments, modified graphene, mica powder, fumed silica and rare earth composite oxide powder into the base material obtained in the step 1, then adding butyl acetate, and fully stirring the mixture by using a stirrer at the stirring speed of 1000r/min until the mixture is uniformly dispersed to obtain an initial coating;
and 3, adding the leveling agent into the initial coating obtained in the step 2, uniformly dispersing by using a dispersion machine to obtain an uncured coating, pumping the uncured coating into a storage tank of an air spray gun, spraying the uncured coating on the surface of the treated stainless steel lining plate by using the air spray gun, standing until the coating is leveled, baking in vacuum at 140 ℃ to solidify into a film, then preserving heat for 10min, and cooling to room temperature along with a furnace to obtain the coating.
Furthermore, the steam inlet is connected with the stainless steel outer lining to form an outer lining opening, the at least one flow guide element is rigidly arranged at the steam inlet, and the distance between the front end of the at least one flow guide element and the cross section of the outer edge of the outer lining opening is 0-3 cm. So as to better adjust the flow direction, the flow rate, the distribution and the impact force of the steam.
Further, at least two separate flow guiding elements are included on either side of the steam inlet axis for regulating, blocking or diverting steam in the steam inlet.
Further, the flow guide element comprises at least one blade block, wherein the blade block is provided with a plurality of blades which are coupled with each other, and the blades of the blade block can rotate around an axis together to better orient the steam and control the impact strength of the steam.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the surface of the stainless steel lining is provided with the heat conduction layer, namely the side of the stainless steel lining which is not coated with the glaze layer is coated with the heat conduction coating, on one hand, the heat conduction coating can protect the stainless steel lining from thermal shock, the corrosion resistance of the stainless steel lining can be greatly improved, the influence of cracking of the stainless steel lining can be completely eliminated, meanwhile, the stainless steel lining can be promoted to be uniformly heated, the thermal stress generated by the stainless steel lining can be effectively reduced, and the probability of porcelain explosion of the glaze layer is further reduced;
2. the steam inlet is provided with a flow guide element which is mainly used for changing the impact direction of steam entering the interlayer of the distillation kettle and enabling the steam to exchange heat with the stainless steel lining in the tangential direction, so that the thermal shock of the steam to the stainless steel lining can be greatly eliminated, meanwhile, because the impact load of the steam is not obviously reduced, the steam with larger impact force is beneficial to being quickly filled in the interlayer and exchanging heat with the stainless steel lining, the non-uniform heating of the stainless steel lining is further eliminated, the stress generated by the enamel layer is reduced, and the probability of porcelain explosion of the enamel layer can be further reduced; in addition, the flow, distribution and impact force of the steam can be adjusted simultaneously by introducing the flow guide element, so that the steam can be more suitable for the requirements of specific conditions, and compared with a gas valve for controlling the steam flow, the flow guide element has the advantages of more abundant functions, more convenience in operation, installation and maintenance and stronger practicability;
3. set up the portion of dispersing at the feed inlet, mainly be in order to make the material decentralization, make the impact force that gets into the material in the cauldron become the dispersion by concentrating, and then reduced impact strength, can effectively reduce the influence that the material impact brought, further reduce the impaired probability of enamel layer.
Drawings
FIG. 1 is a schematic view of the structure of a glass-lined distillation still according to the present invention;
FIG. 2 is a partially enlarged schematic view of portion A of FIG. 1;
FIG. 3 is a schematic view of the feed port configuration of the glass-lined distillation still of the present invention;
FIG. 4 is a schematic view of the steam inlet configuration of the glass-lined distillation still of the present invention;
FIG. 5 is another aspect of the structure of FIG. 4;
FIG. 6 is a rotational adjustment of the adjustment deflector element of FIG. 4;
fig. 7 is a rotation adjustment state of the adjustment deflector element of fig. 5.
The labels in the figure are: the device comprises a shell 1, a shell opening 101, a steam inlet 2, a feed inlet 3, a glaze layer 4, a stainless steel lining 5, a stainless steel outer lining 6, an outer lining opening 601, a heat conduction layer 7, a radiating part 8, a lip 801, a skirt 802, a polytetrafluoroethylene layer 9, a rigid flow guide element 10, a blade block 11 and blades 12.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 7, a glass-lined distillation still comprises a shell 1, a steam inlet 2 and a feed inlet 3, wherein the shell 1 is sequentially provided with an enamel layer 4, a stainless steel lining 5, a heat conduction layer 7 and a stainless steel outer lining 6 from inside to outside, the steam inlet 2 is provided with a plurality of flow guide elements for adjusting air flow, the lower part of the feed inlet 3, which is close to the shell 1, is recessed to form a dispersing part 8, and the dispersing part 8 is used for dispersing and atomizing materials entering the still.
As shown in fig. 3, the dispersing part 8 includes a lip 801 and a skirt 802, the wall of the lower portion of the feeding inlet 3 is recessed inward to form the lip 801, the feeding inlet 3 is connected with the casing 1 to form the casing opening 101, the lip 801 extends outward along the outer edge of the casing opening 101 to form the skirt 802, and the lip 801 and the skirt 802 are of a V-shaped structure integrally formed into the dispersing part 8. The V-shaped structure of the dispersing part 8 can be symmetrically arranged about the axis of the feed inlet 3, and can also be arranged along one side of the axis of the feed inlet 3, so that the material can be dispersed and atomized, and the optimal scheme is that the V-shaped structure of the dispersing part 8 is symmetrically arranged about the axis of the feed inlet 3. Furthermore, the distance from the lip 801 of the divergent portion 8 to the shell opening 101 should not be too large, that is, the axial length of the skirt portion 802 should not be too large, which is preferably kept within 2-10cm, and the optimal distance is 5cm, so as to perform divergent atomization on the material to the maximum extent, accordingly, the minimum caliber of the lip 801 should be as small as possible, but should not affect the feeding speed of the material, and the caliber of the tube wall of the divergent portion 8 should smoothly transition to the minimum caliber along the axial line, so as to prevent the material from being suddenly pressurized and solidified into a block shape; for the skirt portion 802, the pipe diameter of the skirt portion 802 should be changed as large as possible, and the maximum pipe diameter is preferably not smaller than the pipe diameter of the original feed inlet 3, so as to facilitate the sudden pressure release of the material and enhance the dispersion and atomization effect.
Considering that the scattering part 8 is abraded by a large friction force between the scattering part 8 and the material, a polytetrafluoroethylene layer 9 may be formed on an inner surface of the scattering part 8, and abrasion of the scattering part can be greatly reduced by the polytetrafluoroethylene layer 9, and further, a thickness of the polytetrafluoroethylene layer 9 may be set to 50 to 150 μm, preferably 120 μm, according to circumstances.
As shown in fig. 4 and 5, the steam inlet 2 is connected with the stainless steel outer liner 6 to form an outer liner opening 601, at least one flow guide element is rigidly arranged at the steam inlet 2, and the front end of the at least one flow guide element is spaced from the cross section of the outer edge of the outer liner opening 601 by 0-3 cm. In fig. 4 and 5, the rigid flow guiding element 10 is fixedly installed on the axis of the steam inlet 2 to realize the flow diversion of the steam, and the front end of the rigid flow guiding element 10 is flush or nearly flush with the cross section of the outer edge of the opening 601 of the outer lining to ensure that the steam can well flow through the wall surface of the stainless steel inner lining 5 in the tangential direction, and prevent the steam from impacting and wearing the edge of the opening 601 of the outer lining.
Furthermore, at least two separate flow guiding elements are included on either side of the axis of the steam inlet 2 for regulating, blocking or diverting the steam in the steam inlet. As shown in fig. 4 and 5, two sides of the axis of the steam inlet 2 are respectively provided with an adjusting guide element, the blade block 11 and the blade 12 jointly form the adjusting guide element, the adjusting guide element is rotatably connected to the inner wall of the steam inlet 2, and when the adjusting guide element is rotated, the adjustment, blocking or turning of the steam can be realized.
More specifically, in fig. 4 and 5, the flow-guiding element comprises at least one blade block 11, one blade block 11 having a plurality of mutually coupled blades 12 (in fig. 5 only the rigid flow-guiding element 10 is provided with blades 12, unlike in fig. 4), the blades 12 of the blade block 11 being jointly rotatable about an axis to better achieve regulation, blocking or turning of the steam, as shown in fig. 6 and 7.
In the invention, the heat conducting layer 7 is formed by coating heat conducting paint, and the heat conducting paint is composed of the following raw materials in parts by weight: 34-39 parts of vinyl resin, 1-3 parts of modified graphene, 10-12 parts of asphalt carbon fiber yarns, 6-8 parts of mica powder, 5-7 parts of rare earth composite oxide powder, 18-30 parts of butyl acetate, 0.5-1 part of fumed silica, 1-1.5 parts of dispersing agent and 0.5-1 part of flatting agent, wherein the rare earth composite oxide powder is selected from La0.7Sr0.3Fe0.8Ni0.2O3、Sr0.8Dy0.2CoO2.6、La0.7Sr0.3Co0.9Cu0.1O3、La0.4Sr0.6Co0.9Cu0.1O3Preferably La0.4Sr0.6Co0.9Cu0.1O3。
In order to enhance the bonding strength of the interface between graphene and other organic components, the thickness of the modified graphene is 10-20nm, and the preparation method comprises the following steps: mixing graphene with the thickness of 10-20nm and absolute ethyl alcohol according to the mass ratio of 1: 80, then adding 0.6 wt% of silane coupling agent, stirring uniformly, then putting the mixture into an ultrasonic emulsification disperser for full dispersion, finally taking out the mixture and putting the mixture into a drying oven for drying, thus obtaining the product.
More particularly, the preparation and use method of the heat-conducting coating comprises the following steps:
step 1, adding vinyl resin and a dispersing agent into a reactor, and then stirring the mixed components by a stirrer at the rotating speed of 800r/min until the components are uniformly dispersed to obtain a base material;
step 2, sequentially adding asphalt carbon fiber filaments, modified graphene, mica powder, fumed silica and rare earth composite oxide powder into the base material obtained in the step 1, then adding butyl acetate, and fully stirring the mixture by using a stirrer at the stirring speed of 1000r/min until the mixture is uniformly dispersed to obtain an initial coating;
and 3, adding the leveling agent into the initial coating obtained in the step 2, uniformly dispersing by using a dispersion machine to obtain an uncured coating, pumping the uncured coating into a storage tank of an air spray gun, spraying the uncured coating on the surface of the treated stainless steel lining plate by using the air spray gun, standing until the coating is leveled, baking in vacuum at 140 ℃ to solidify into a film, then preserving heat for 10min, and cooling to room temperature along with a furnace to obtain the coating.
Example one
A heat-conducting coating coated on the surface of a stainless steel lining of a glass-lined distillation still comprises the following raw materials in parts by weight: 34 parts of vinyl resin, 1 part of modified graphene, 10 parts of asphalt carbon fiber yarns, 6 parts of mica powder, 18 parts of butyl acetate, 0.5 part of fumed silica, 1 part of dispersing agent, 0.5 part of flatting agent, and Sr0.8Dy0.2CoO2.65 parts of powder, and the preparation method comprises the following steps:
step 1, adding vinyl resin and a BYK-ATU dispersing agent into a reactor, and then stirring the mixed components by a stirrer at the rotating speed of 800r/min until the components are uniformly dispersed to obtain a base material;
step 2, adding asphalt carbon fiber filaments, modified graphene, sericite powder, fumed silica and Sr into the base material obtained in the step 1 in sequence0.8Dy0.2CoO2.6Adding butyl acetate into the powder, and fully stirring the mixture by using a stirrer at the stirring speed of 1000r/min until the mixture is uniformly dispersed to obtain an initial coating;
and 3, adding the BYK-355 flatting agent into the initial coating obtained in the step 2, uniformly dispersing by using a dispersion machine to obtain an uncured coating, pumping the uncured coating into a storage tank of an air spray gun, spraying the uncured coating on the surface of the treated substrate by using the air spray gun, standing until the coating is flatly leveled, putting the coating into a high-temperature oven, baking and curing the coating in vacuum at 140 ℃ to form a film, preserving the heat for 10min, and cooling the coating to room temperature along with the oven to obtain the coating.
Example two
A heat-conducting coating coated on the surface of a stainless steel lining of a glass-lined distillation still comprises the following raw materials in parts by weight: 39 parts of vinyl resin, 3 parts of modified graphene, 12 parts of asphalt carbon fiber yarns, 8 parts of mica powder, 30 parts of butyl acetate, 1 part of fumed silica, 1.5 parts of dispersing agent, 1 part of flatting agent and Sr0.8Dy0.2CoO2.67 parts of powder, wherein the preparation method comprises the following steps:
step 1, adding vinyl resin and a BYK-ATU dispersing agent into a reactor, and then stirring the mixed components by a stirrer at the rotating speed of 800r/min until the components are uniformly dispersed to obtain a base material;
step 2, adding asphalt carbon fiber filaments, modified graphene, sericite powder, fumed silica and Sr into the base material obtained in the step 1 in sequence0.8Dy0.2CoO2.6Adding butyl acetate into the powder, and fully stirring the mixture by using a stirrer at the stirring speed of 1000r/min until the mixture is uniformly dispersed to obtain an initial coating;
and 3, adding the BYK-355 flatting agent into the initial coating obtained in the step 2, uniformly dispersing by using a dispersion machine to obtain an uncured coating, pumping the uncured coating into a storage tank of an air spray gun, spraying the uncured coating on the surface of the treated substrate by using the air spray gun, standing until the coating is flatly leveled, putting the coating into a high-temperature oven, baking and curing the coating in vacuum at 140 ℃ to form a film, preserving the heat for 10min, and cooling the coating to room temperature along with the oven to obtain the coating.
EXAMPLE III
A heat-conducting coating coated on the surface of a stainless steel lining of a glass-lined distillation still comprises the following raw materials in parts by weight: 35 parts of vinyl resin, 2 parts of modified graphene, 11 parts of asphalt carbon fiber yarns, 6.5 parts of mica powder, 25 parts of butyl acetate, 0.7 part of fumed silica, 1.2 parts of dispersing agent, 0.7 part of flatting agent, and La0.4Sr0.6Co0.9Cu0.1O36.5 parts of powder, and the preparation method comprises the following steps:
step 1, adding vinyl resin and a BYK-ATU dispersing agent into a reactor, and then stirring the mixed components by a stirrer at the rotating speed of 800r/min until the components are uniformly dispersed to obtain a base material;
step 2, adding asphalt carbon fiber filaments, modified graphene, sericite powder, fumed silica and La into the base material obtained in the step 1 in sequence0.4Sr0.6Co0.9Cu0.1O3Adding butyl acetate into the powder, and fully stirring the mixture by using a stirrer at the stirring speed of 1000r/min until the mixture is uniformly dispersed to obtain an initial coating;
and 3, adding the BYK-355 flatting agent into the initial coating obtained in the step 2, uniformly dispersing by using a dispersion machine to obtain an uncured coating, pumping the uncured coating into a storage tank of an air spray gun, spraying the uncured coating on the surface of the treated substrate by using the air spray gun, standing until the coating is flatly leveled, putting the coating into a high-temperature oven, baking and curing the coating in vacuum at 140 ℃ to form a film, preserving the heat for 10min, and cooling the coating to room temperature along with the oven to obtain the coating.
Example four
A heat-conducting coating coated on the surface of a stainless steel lining of a glass-lined distillation still comprises the following raw materials in parts by weight: 36 parts of vinyl resin, 2 parts of modified graphene, 10 parts of asphalt carbon fiber yarns, 7 parts of mica powder, 27 parts of butyl acetate, 1 part of fumed silica, 1.5 parts of a dispersing agent, 0.8 part of a flatting agent and 7 parts of La0.4Sr0.6Co0.9Cu0.1O3 powder, wherein the preparation method comprises the following steps:
step 1, adding vinyl resin and a BYK-ATU dispersing agent into a reactor, and then stirring the mixed components by a stirrer at the rotating speed of 800r/min until the components are uniformly dispersed to obtain a base material;
step 2, sequentially adding asphalt carbon fiber yarns, modified graphene, sericite powder, fumed silica and La0.4Sr0.6Co0.9Cu0.1O3 powder into the base material obtained in the step 1, then adding butyl acetate, and fully stirring the mixture by using a stirrer at the stirring speed of 1000r/min until the mixture is uniformly dispersed to obtain an initial coating;
and 3, adding the BYK-355 flatting agent into the initial coating obtained in the step 2, uniformly dispersing by using a dispersion machine to obtain an uncured coating, pumping the uncured coating into a storage tank of an air spray gun, spraying the uncured coating on the surface of the treated substrate by using the air spray gun, standing until the coating is flatly leveled, putting the coating into a high-temperature oven, baking and curing the coating in vacuum at 140 ℃ to form a film, preserving the heat for 10min, and cooling the coating to room temperature along with the oven to obtain the coating.
The coatings obtained in the above examples were subjected to the following performance tests:
1. temperature resistance: thermogravimetric analyzer
2. Hardness: shore 00 durometer
3. Density: density balance
4. Coefficient of thermal conductivity: performing according to the ASTM D5470 standard
5. Adhesion force: cross section method according to ISO2409-2007
The test results were as follows:
the heat-conducting coating has the advantages of good heat conduction, flexibility and stability, difficult occurrence of defects such as cracks, folds, cracks and the like when being stretched, compressed, expanded with heat and contracted with cold, extremely low compression deformation rate, difficult shedding of the cured coating and strong anti-corrosion capability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A glass-lined distillation still comprises a shell, a steam inlet and a feed inlet, and is characterized in that the shell is sequentially provided with an enamel layer, a stainless steel lining, a heat conduction layer and a stainless steel outer lining from inside to outside, the steam inlet is provided with a plurality of flow guide elements for adjusting air flow, the steam inlet is connected with the stainless steel outer lining to form an outer lining opening, at least one flow guide element is rigidly arranged at the steam inlet, and the distance between the front end of at least one flow guide element and the cross section of the outer edge of the outer lining opening is 0-3 cm;
the heat conduction layer is formed by coating heat conduction coating, and the heat conduction coating comprises the following raw materials in parts by weight: 34-39 parts of vinyl resin, 1-3 parts of modified graphene, 10-12 parts of asphalt carbon fiber yarns, 6-8 parts of mica powder, 5-7 parts of rare earth composite oxide powder, 18-30 parts of butyl acetate, 0.5-1 part of fumed silica, 1-1.5 parts of dispersing agent and 0.5-1 part of flatting agent, wherein the rare earth composite oxide powder is selected from La0.7Sr0.3Fe0.8Ni0.2O3、Sr0.8Dy0.2CoO2.6、La0.7Sr0.3Co0.9Cu0.1O3、La0.4Sr0.6Co0.9Cu0.1O3One or more combinations of (a);
the thickness of the modified graphene is 10-20nm, and the preparation method comprises the following steps: mixing graphene with the thickness of 10-20nm and absolute ethyl alcohol according to the mass ratio of 1: 80, then adding 0.6 wt% of silane coupling agent, stirring uniformly, then putting the mixture into an ultrasonic emulsification disperser for full dispersion, finally taking out the mixture and putting the mixture into a drying oven for drying to obtain the product;
the preparation and use method of the heat-conducting coating comprises the following steps:
step 1, adding vinyl resin and a dispersing agent into a reactor, and then stirring the mixed components by a stirrer at the rotating speed of 800r/min until the components are uniformly dispersed to obtain a base material;
step 2, sequentially adding asphalt carbon fiber filaments, modified graphene, mica powder, fumed silica and rare earth composite oxide powder into the base material obtained in the step 1, then adding butyl acetate, and fully stirring the mixture by using a stirrer at the stirring speed of 1000r/min until the mixture is uniformly dispersed to obtain an initial coating;
and 3, adding the leveling agent into the initial coating obtained in the step 2, uniformly dispersing by using a dispersion machine to obtain an uncured coating, pumping the uncured coating into a storage tank of an air spray gun, spraying the uncured coating on the surface of the treated stainless steel lining plate by using the air spray gun, standing until the coating is leveled, baking in vacuum at 140 ℃ to solidify into a film, then preserving heat for 10min, and cooling to room temperature along with a furnace to obtain the coating.
2. The glass-lined distillation still kettle of claim 1, wherein the lower portion of the feed inlet near the shell is recessed to form a divergent portion for divergent atomization of the material entering the kettle.
3. The glass-lined distillation still of claim 2, wherein the divergent portion comprises a lip and a skirt, wherein the wall of the lower portion of the feed inlet is recessed inwardly to form the lip, the feed inlet is engaged with the shell to form the shell opening, the lip extends outwardly along the outer edge of the shell opening to form the skirt, and the lip and the skirt are self-integrated into a V-shaped configuration of the divergent portion.
4. The glass-lined distillation still according to claim 2, wherein the inner surface of the divergent portion is provided with a polytetrafluoroethylene layer, and the polytetrafluoroethylene layer has a thickness of 50 to 150 μm.
5. The glass-lined distillation still according to claim 1, wherein at least two separate baffle elements are included on either side of the steam inlet axis for regulating, blocking or diverting steam in the steam inlet.
6. The glass-lined distillation still according to claim 5, wherein the flow guide element comprises at least one vane block, one vane block having a plurality of vanes coupled to one another, and the vanes of the vane block being rotatable together about an axis.
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| CN201610813917.2A CN106189733B (en) | 2016-09-09 | 2016-09-09 | A kind of enamel distillation still |
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| CN108641414A (en) * | 2018-03-27 | 2018-10-12 | 韶关市中广测协同创新技术有限公司 | A kind of environmental protection chromium-free zinc aluminum masking liquid and preparation method thereof |
| CN109570200A (en) * | 2018-12-10 | 2019-04-05 | 厦门康浩科技有限公司 | A kind of device and method using subcritical water harmless treatment animals died of illness |
| CN109432455A (en) * | 2018-12-27 | 2019-03-08 | 西藏净源科技有限公司 | Medical high-pressure sterilizing pot |
| CN110152331A (en) * | 2019-05-31 | 2019-08-23 | 天津科技大学 | Shell-and-tube evaporator steam inlet buffer unit |
| CN115075871A (en) * | 2022-07-21 | 2022-09-20 | 中勘资源勘探科技股份有限公司 | Mine grouting filling device and method |
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| CN108854130A (en) | 2018-11-23 |
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