CN209010163U - Deacidification furnace - Google Patents

Deacidification furnace Download PDF

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Publication number
CN209010163U
CN209010163U CN201821635716.9U CN201821635716U CN209010163U CN 209010163 U CN209010163 U CN 209010163U CN 201821635716 U CN201821635716 U CN 201821635716U CN 209010163 U CN209010163 U CN 209010163U
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China
Prior art keywords
furnace body
body section
furnace
deacidification
section
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Expired - Fee Related
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CN201821635716.9U
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Chinese (zh)
Inventor
胡晞
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Suzhou Huaweite Powder Technology Co Ltd
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Suzhou Huaweite Powder Technology Co Ltd
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Abstract

The utility model relates to a kind of deacidification furnaces, comprising: the first furnace body section, the second furnace body section and the third furnace body section set gradually from top to bottom;Wherein, the inside of the first furnace body section is equipped with filter plate, and the first furnace body section is separated into the first cavity and the second cavity by filter plate from top to bottom;First cavity is equipped with offgas outlet, and the second cavity is equipped with feed inlet;Second furnace body section is equipped with steam entry;Third furnace body section is equipped with hot air inlet, and the end of third furnace body section is equipped with discharge port.Above-mentioned deacidification furnace is divided into three different furnace body sections, steam entry is located at the second furnace body section, hot air inlet is located at third furnace body section, steam entry and hot air inlet are separately positioned on to different furnace body sections, so that depickling and ultimate drying separately carry out, alumina powder drying can be made more abundant, obtained powder quality is preferable.

Description

Deacidification furnace
Technical Field
The utility model relates to a deacidification technical field especially relates to a deacidification stove.
Background
The vapor phase method alumina has the characteristics of high specific surface area, good dispersibility and positive charge on the surface, and is widely applied to the fields of energy-saving lamps, paper making, film preparation, powder coating and the like. The surface of the fumed alumina powder is adhered with hydrogen chloride, and if the pH value of the fumed alumina dispersion with the mass fraction of 4% is 4.5-5.5, the fumed alumina dispersion has strong acidity, and the expansion of the application space of the alumina is limited. Therefore, deacidification is an important link in the production of the aluminum oxide powder by a gas phase method.
Common deacidification methods include a hot air alcohol adding method, a hot air amine adding method, a dry hot air method, a wet hot air method, a pressure reduction vibration fluidization method and the like. The hot air alcohol adding method and the hot air amine adding method can introduce impurity groups on the surface of the powder, and influence the performance of the aluminum oxide. The dry hot air method requires a higher deacidification temperature and a longer deacidification time, and the pH value is difficult to meet the requirement. The wet and hot air method and the reduced pressure vibration fluidization method have similar deacidification principles, low deacidification temperature, no increase of impurities and high working efficiency, so the two processes are two deacidification methods commonly used in production.
In the traditional deacidification process by a wet and hot air method, the problem of insufficient drying of the alumina powder often occurs, so that the alumina powder is subjected to secondary agglomeration, and the grain diameter of the deacidified product is larger.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide a deacidification furnace in order to solve the problem of insufficient drying of alumina powder in the conventional wet and hot air deacidification process.
A deacidification furnace comprising: the first furnace body section, the second furnace body section and the third furnace body section are sequentially arranged from top to bottom; the first furnace body section is internally provided with a filter plate, and the filter plate divides the first furnace body section into a first cavity and a second cavity from top to bottom; the first cavity is provided with a tail gas outlet, and the second cavity is provided with a feed inlet; the second furnace body section is provided with a water vapor inlet; the third furnace body section is provided with a hot air inlet, and the end part of the third furnace body section is provided with a discharge hole.
The technical scheme at least has the following technical effects: the deacidification furnace is divided into three different furnace body sections, and the alumina powder is added into the deacidification furnace from the feed inlet of the second cavity in the first furnace body section, and deacidification and drying are completed by utilizing the sedimentation of the powder body to sequentially pass through the second furnace body section and the third furnace body section. The steam inlet is located in the second furnace body section, the hot air inlet is located in the third furnace body section, and the steam inlet and the hot air inlet are respectively arranged in different furnace body sections, so that deacidification and final drying are separately carried out, the drying of the alumina powder can be more sufficient, and the obtained powder has better quality. The first furnace body section is provided with a filter plate, and powder in mixed gas can be prevented from being discharged. The mixed gas is discharged into an acid washing and alkali washing device from a tail gas outlet and then is discharged into the atmosphere. The end of third furnace body section is located to the discharge gate, can directly be connected with conveyer, collects the powder fast.
The above technical solution is further explained below.
In one embodiment, the first furnace body section, the second furnace body section and the third furnace body section are all cylindrical, and the diameter of the first furnace body section is larger than the diameter of the second furnace body section, and the diameter of the second furnace body section is larger than the diameter of the third furnace body section.
In one embodiment, the circumferential dimension of the connecting transition between the first and second furnace body sections is gradually reduced.
In one embodiment, the circumferential dimension of the connecting transition between the second furnace body section and the third furnace body section is gradually reduced.
In one embodiment, the tap is started from an end of the third furnace body section, and a circumferential dimension of the tap is gradually increased from the end of the third furnace body section.
In one embodiment, the filter plate is mounted inside the first furnace section by a connector fixed to the first furnace section.
In one embodiment, the filter plate has a plurality of through holes penetrating through a thickness direction of the filter plate.
In one embodiment, the filter plate is provided as a conical surface at the surface of the first cavity.
In one embodiment, the first furnace body section, the second furnace body section and the third furnace body section are wrapped with heat insulation materials.
Drawings
FIG. 1 is a schematic view of a deacidification furnace according to an embodiment of the present invention;
fig. 2 is a flow chart of an aluminum oxide powder deacidification process according to an embodiment of the present invention.
Wherein: 100. deacidifying furnace 120, first furnace body section 122, first cavity
124. A second cavity 126, an exhaust outlet 128, and a feed inlet
129. Connecting piece 130, second furnace body section 132, steam inlet
140. Third furnace body section 142, hot air inlet 150, filter plate
160. Discharge port
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The applicant researches and discovers that: traditional damp and hot air method deacidification equipment, in vapor and hot-air let in deacidification equipment simultaneously from the same import, the deacidification of aluminium oxide powder and drying go on simultaneously for aluminium oxide powder is dry inadequately, takes place the secondary easily and reunites, and the product particle size that leads to after the deacidification is great.
To this end, referring to fig. 1, an embodiment of the present invention provides a deacidification furnace 100, which can dry alumina powder more fully. The deacidification furnace 100 includes: a first furnace section 120, a second furnace section 130 and a third furnace section 140 arranged in sequence from top to bottom. Wherein, the inside of the first furnace section 120 is provided with a filter plate 150, and the filter plate 150 divides the first furnace section 120 into a first cavity 122 and a second cavity 124 from top to bottom; the first cavity 122 is provided with an exhaust gas outlet 126, and the second cavity 124 is provided with a feed inlet 128; the second furnace section 130 is provided with a water vapor inlet 132; the third furnace section 140 is provided with a hot air inlet 142 and the end of the third furnace section 140 is provided with a delivery spout 160.
The deacidification principle of the wet and hot air deacidification method is that water vapor and hot air are introduced into a deacidification furnace, hydrogen chloride attached to the surface of the alumina powder is removed by the water vapor, and the alumina powder attached with the water vapor is dried by the hot air to obtain the deacidified alumina powder.
In this embodiment, the deacidification furnace 100 is divided into three different furnace body sections, a first furnace body section 120, a second furnace body section 130 and a third furnace body section 140. The first furnace section 120 acts as a separation section and hydrogen chloride is exhausted from the off-gas outlet 126 of the first furnace section 120 and may be exhausted to the acid and caustic wash unit for neutralization and then to the atmosphere. The second furnace body section 130 is provided with a steam inlet 132 as a mixed heating section, after steam is introduced, hydrogen chloride on the surface of the alumina powder can be effectively removed, and the steam has a certain temperature to ensure the temperature in the deacidification furnace 100, and deacidification and primary drying are carried out. The third furnace section 140 acts as a hot air heating section, which can dry the alumina powder bodies well. The second furnace body section 130 and the third furnace body section 140 can improve the heating efficiency, and the drying of the alumina powder can be realized by hot air with lower temperature, so that an additional heating device is not needed, and the energy consumption is reduced. The water vapor inlet 132 and the hot air inlet 142 are respectively arranged at different positions, so that deacidification and drying can be separately performed, and finally, the alumina powder is dried by hot air, so that the alumina powder with high drying degree can be obtained, secondary agglomeration of the alumina powder is prevented, and a product with small particle size is obtained.
In addition, the feeding port 128 is arranged on the first furnace body section 120, deacidification and drying steps are sequentially completed by utilizing self sedimentation of alumina powder, the internal structure is simpler, and other structures are not needed for auxiliary completion. The filter plate 150 can intercept alumina powder mixed in gases such as hydrogen chloride and water vapor, and keep the alumina powder in the deacidification furnace 100 to prevent the alumina powder from being discharged out of the deacidification furnace 100 along with the mixed gas. The outlet 160 is disposed at an end of the third furnace section 140 away from the second furnace section 130, the alumina powder is directly discharged from the outlet 160, and a conveying device, such as a conveyor belt, may be disposed below the outlet 160 to directly collect and transfer the alumina powder, and the alumina powder is not required to be disposed on a side wall of the furnace body as in the conventional method, and a complicated collecting device is required.
The technical scheme at least has the following technical effects: the deacidification furnace 100 is divided into three different furnace sections, and alumina powder is fed into the deacidification furnace 100 from the feed inlet 128 of the second chamber 124 in the first furnace section 120, and deacidification and drying are completed by settling the powder through the second furnace section 130 and the third furnace section 140 in sequence. The water vapor inlet 132 is positioned in the second furnace body section 130, the hot air inlet 142 is positioned in the third furnace body section 140, and the water vapor inlet 132 and the hot air inlet 142 are respectively arranged in different furnace body sections, so that deacidification and final drying are separately carried out, the drying of the alumina powder can be more sufficient, and the quality of the obtained powder is better. The first furnace section 120 is provided with a filter 150 capable of preventing powder in the mixed gas from being discharged. The mixed gas is discharged from the tail gas outlet 126 to the acid washing and alkali washing devices and then discharged to the atmosphere. The discharge port 160 is disposed at an end of the third furnace section 140, and can be directly connected to a conveyor to rapidly collect powder.
In some embodiments, the first furnace section 120, the second furnace section 130, and the third furnace section 140 are all cylindrical, and the first furnace section 120 has a diameter greater than the diameter of the second furnace section 130, and the second furnace section 130 has a diameter greater than the diameter of the third furnace section 140. The first furnace section 120, the second furnace section 130 and the third furnace section 140 are cylindrical and have diameters that are sequentially reduced in order to prevent alumina powder from falling around, reduce the radial path of the alumina powder, and improve the collection rate of the alumina powder. In addition, the longer length of the second furnace body section 130 and the third furnace body section 140 can increase the axial path of the alumina powder, increase the contact time of the water vapor and the hot air with the alumina powder, and lead the alumina powder to be deacidified and dried fully in a relatively short time. Of course, the first furnace section 120, the second furnace section 130, and the third furnace section 140 may also have other shapes, such as a hollow square or rectangle, and are not limited in this embodiment.
In some embodiments, the circumferential dimension of the connecting transition between the first furnace section 120 and the second furnace section 130 is gradually reduced. Likewise, the circumferential dimension of the connecting transition between the second furnace body section 130 and the third furnace body section 140 is also gradually reduced. So set up, on the one hand, the structure of whole deacidification furnace 100 is more harmonious from the outward appearance, and the connection changeover portion is more smooth and rounder. On the other hand, the connecting transition section is inclined, so that the alumina powder body is convenient to collect, and more and faster subside along the inclined connecting transition section.
In some embodiments, the spout 160 begins from an end of the third furnace section 140, and the circumferential dimension of the spout 160 gradually increases from the end of the third furnace section 140. The discharge hole 160 has a certain length, and the circumferential dimension is gradually increased, for example, the discharge hole 160 is in a circular truncated cone shape, and the diameter of the side wall is gradually increased. Design into the shape that circumference size reduces gradually with the discharge gate for traditional, can reduce discharge gate 160 and block up the problem, simultaneously, the aluminium oxide powder subsides the back naturally, piles up easily and forms similar cone form, designs into crescent trend with the circumference size of discharge gate 160, accords with the physics and subsides the principle, can place and collect more aluminium oxide powder.
In some embodiments, the filter plate 150 is mounted inside the first furnace section 120 by a connector 129 that is secured to the first furnace section 120. The circumferential profile of the filter plates 150 matches the inner wall profile of the first furnace section 120. As shown in fig. 1, the filter plate 150 divides the first furnace section 120 into upper and lower chambers, and is mounted inside the first furnace section 120 by a connection member 129, and the connection member 129 is fixed to an end of the first furnace section 120, that is, the top of the first furnace section 120 in fig. 1. The connection member 129 may be a single connection rod connected to the center portion of the filter plate 150; or a plurality of connecting rods uniformly connected with the filter plate 150; and may be a hook that hooks over the filter plate 150. The structure of the connecting member 129 is not limited, and the connecting member 129 may be fixed to the inner sidewall of the first furnace section 120.
Further, the filter plate 150 has a plurality of through holes penetrating through the thickness direction of the filter plate 150. The filter plate 150 has a plurality of through holes penetrating through the thickness direction thereof, and the contour dimension of the through holes is smaller than the particle size of the alumina powder, so that the alumina powder is prevented from passing through the through holes and being discharged out of the deacidification furnace 100 along with the mixed gas, and only the mixed gas (hydrogen chloride, water vapor, etc.) is discharged out of the through holes.
Further, the surface of the filter plate 150 within the first cavity 122 is provided as a tapered surface. It will be appreciated that the filter plate 150 is provided with a conical surface, which may be conical, pyramidal. And the shape of a conical frustum, such as a truncated cone or a truncated pyramid. That is to say that filter 150 is close to edge profile department relatively and has certain inclination, and the alumina powder body of being convenient for subsides more and more fast, for planar filter, can collect the alumina powder body more fast, reduces the collection time of alumina powder. As shown in fig. 1, the filter plate 150 is in a shape of a conical table, and the filter plate 150 is in a shape of a plane from the center to the periphery, and then is in a shape of a circumferential contour with an increasing size, and has a certain inclination angle.
In some embodiments, the exterior of the first furnace section 120, the second furnace section 130, and the third furnace section 140 are each wrapped with insulation. The first, second and third furnace body sections 120, 130 and 140 are each externally coated with a layer of insulating material capable of maintaining the temperature within the deacidification furnace 100 at an outside temperature of 50-55 c. The heat insulation material can be one or a plurality of compositions of silicon dioxide aerogel, precipitated silicon dioxide, wollastonite, vermiculite, glass fiber, quartz glass fiber, boron fiber, ceramic fiber and the like, can effectively prevent 100 heat loss of the deacidification furnace, reduce energy consumption, play a good heat insulation effect and assist to obtain a better deacidification effect.
Referring to the flow chart shown in fig. 2, in an embodiment of the present invention, the deacidification furnace 100 according to any one of the above embodiments is used for deacidifying the alumina powder, including the following steps:
and S100, respectively introducing water vapor and hot air through a water vapor inlet and a hot air inlet to preheat the deacidification furnace.
Water vapor and hot air having a certain temperature are introduced into the deacidifying furnace 100 through the water vapor inlet 132 and the hot air inlet 142, respectively, to preheat the deacidifying furnace 100 and provide a certain deacidifying temperature.
S200, adding alumina powder into the first furnace body section through the feeding hole, allowing the alumina powder to settle and to sequentially pass through the second furnace body section and the third furnace body section, discharging from the discharging hole, introducing water vapor into the second furnace body section in the alumina powder settling process, and introducing hot air into the third furnace body section.
The alumina powder is fed into the deacidification furnace 100 from the feed inlet 128 and naturally settles under its own action. The alumina powder is deacidified and primarily dried via the second furnace section 130, finally dried via the third furnace section 140, and falls from the outlet 160 into a conveyor, such as a conveyor belt, located below the outlet 160, where the deacidified and dried alumina powder is collected and transferred. The mixed gas (hydrogen chloride, steam, etc.) rises to the first furnace section 120 and exits the deacidification furnace 100 through the filter plate 150 from the tail gas port, and can be discharged to the acid washing and alkaline washing device for neutralization and then discharged to the atmosphere.
The technical scheme at least has the following technical effects: the deacidification process of the alumina powder adopts the deacidification furnace 100, the water vapor inlet 132 is positioned in the second furnace body section 130, the hot air inlet 142 is positioned in the third furnace body section 140, and the water vapor inlet 132 and the hot air inlet 142 are respectively arranged in different furnace body sections, so that the deacidification and the final drying are separately carried out, and the drying of the alumina powder can be more sufficient. The steam and hot air are introduced to preheat the deacidification furnace 100, the alumina powder is added into the deacidification furnace 100 from the feed inlet 128 of the second cavity 124 in the first furnace body section 120, and the deacidification and drying are completed by the sedimentation of the alumina powder passing through the second furnace body section 130 and the third furnace body section 140 in sequence. The first furnace section 120 is provided with a filter 150 capable of preventing powder in the mixed gas from being discharged. The mixed gas is discharged from the tail gas outlet 126 to the acid washing and alkali washing devices and then discharged to the atmosphere. The discharge port 160 is disposed at an end of the third furnace section 140, and can be directly connected to a conveyor to rapidly collect powder.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (9)

1. A deacidification furnace, comprising:
the first furnace body section, the second furnace body section and the third furnace body section are sequentially arranged from top to bottom; wherein,
the first furnace body section is internally provided with a filter plate, and the filter plate divides the first furnace body section into a first cavity and a second cavity from top to bottom; the first cavity is provided with a tail gas outlet, and the second cavity is provided with a feed inlet;
the second furnace body section is provided with a water vapor inlet;
the third furnace body section is provided with a hot air inlet, and the end part of the third furnace body section is provided with a discharge hole.
2. The deacidification furnace of claim 1, wherein the first furnace body section, the second furnace body section and the third furnace body section are cylindrical, and wherein the first furnace body section has a diameter greater than the diameter of the second furnace body section, and wherein the second furnace body section has a diameter greater than the diameter of the third furnace body section.
3. The deacidification furnace as defined in claim 1, wherein a circumferential dimension of a connecting transition between the first and second furnace body sections is gradually reduced.
4. A deacidification furnace as claimed in claim 1, wherein the circumferential dimension of the connecting transition between the second and third furnace body sections is gradually reduced.
5. The deacidification furnace as defined in claim 1, wherein the spout starts from an end of the third furnace body section and the circumferential dimension of the spout increases from the end of the third furnace body section.
6. The deacidification furnace of claim 1, wherein said filter panels are mounted inside said first furnace body section by a connector secured to said first furnace body section.
7. The deacidification furnace according to claim 1, wherein the filter plate has a plurality of through holes penetrating a thickness direction of the filter plate.
8. The deacidification furnace according to claim 1, wherein the filter plates are provided as tapered surfaces at the surface of the first chamber.
9. The deacidification furnace defined in claim 1, wherein the first, second and third furnace sections are externally wrapped with insulation.
CN201821635716.9U 2018-10-09 2018-10-09 Deacidification furnace Expired - Fee Related CN209010163U (en)

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Application Number Priority Date Filing Date Title
CN201821635716.9U CN209010163U (en) 2018-10-09 2018-10-09 Deacidification furnace

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CN209010163U true CN209010163U (en) 2019-06-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109019648A (en) * 2018-10-09 2018-12-18 苏州华微特粉体技术有限公司 Deacidification furnace, alumina powder deacidifying process
CN111747418A (en) * 2019-07-05 2020-10-09 江西黑猫炭黑股份有限公司 White carbon black deacidification system and method by gas phase method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109019648A (en) * 2018-10-09 2018-12-18 苏州华微特粉体技术有限公司 Deacidification furnace, alumina powder deacidifying process
CN111747418A (en) * 2019-07-05 2020-10-09 江西黑猫炭黑股份有限公司 White carbon black deacidification system and method by gas phase method

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