CN205419831U - Result separation and drying equipment of nitromethane building -up reactions - Google Patents
Result separation and drying equipment of nitromethane building -up reactions Download PDFInfo
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- CN205419831U CN205419831U CN201620202550.6U CN201620202550U CN205419831U CN 205419831 U CN205419831 U CN 205419831U CN 201620202550 U CN201620202550 U CN 201620202550U CN 205419831 U CN205419831 U CN 205419831U
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Abstract
The utility model relates to a chemical industry field discloses a result separation and drying equipment of nitromethane building -up reactions very much. This result separation and drying equipment of nitromethane building -up reactions including the cauldron body, vacuum pump and condenser, is equipped with a heating mechanism in the outside of the cauldron body, is equipped with a mixing system in the inboard of the cauldron body, the distillation mouthful inlet end through pipeline and vacuum pump is linked together, and the end of giving vent to anger of vacuum pump links to each other through the entry of pipeline with the condenser, the cauldron body is including the open barrel that sets up in both ends with through the cone of flange joint in the barrel bottom. The utility model discloses result separation and drying equipment of nitromethane building -up reactions, behind cauldron internal nitromethane and waste water evaporation to dryness, sodium sulphate can directly be the powdered cauldron body lower part drain hole of following and flow, has simplified the process, reduces environmental pollution, without the centrifuge separation, has saved the equipment investment, has saved a large amount of manpower and materials, is favorable to popularization and application.
Description
Technical field
This utility model relates to chemical field, and the product particularly to a kind of nitromethane synthetic reaction separates and drying equipment.
Background technology
Dimethyl sulfate nitroso-group method of substitution produces in the production technology of nitromethane, and dimethyl sulfate and sodium nitrite generation substitution reaction, in addition to generating nitromethane product, also can produce a large amount of sodium sulfate.The side-product that sodium sulfate produces as nitromethane, is present in nitromethane waste water in a large number, has exceeded the pollutant emission standard of country.Meanwhile, sodium sulfate, as a kind of important industrial chemicals, if the most recovered the most directly discharge, not only pollutes environment but also waste resource.Traditional sodium sulfate processing method is by after the nitromethane Waste water concentrating of sulfur acid sodium, is deviate from by the solid sodium sulfate in concentrated solution by centrifuge the most again.First this processing method has the disadvantage that, the concentrated rear viscosity of nitromethane waste water of sulfur acid sodium is the biggest, and the reactor used when concentrating is spherical reactor, the opening of autoclave body bottom is less, cause the sodium sulfate being concentrated to give to be difficult to by the opening of autoclave body bottom to discharge, need again to add water in reactor, make sodium sulfate be diluted to pasty state and discharge from autoclave body bottom, be re-fed into centrifuge and be again dehydrated.Secondly, throwing away sodium sulphate content in the waste water after solid sodium sulfate by centrifuge the highest, even saturated solution, it is impossible to discharge immediately or recycle, in addition it is also necessary to process further, operation is more complicated, reduces production efficiency, and energy resource consumption is bigger.Again, in this processing method, centrifuge needs material to be evenly distributed in centrifuge running when, if material skewness, the operation of centrifuge is by disequilibrium bad shocking, centrifuge is caused to be easily damaged, increase the maintenance in later stage to put into, time serious, even can threaten the safety of Field Force.Finally, waste water can contain the harmful substances such as nitromethane unavoidably, and nitromethane is readily volatilized in air, causes damage the health of employee, there is certain potential safety hazard.
Utility model content
This utility model is in order to make up the deficiencies in the prior art, provide a kind of reasonable in design, save equipment investment, use manpower and material resources sparingly, avoid toxic gas discharge pollute production environment nitromethane synthetic reaction product separate and drying equipment, solve problems of the prior art.
This utility model is achieved by the following technical solution:
The product of a kind of nitromethane synthetic reaction separates and drying equipment, including kettle, vacuum pump and condenser, kettle outside be provided with a heating arrangements, it is provided with a stirring system in the inner side of kettle, it is provided with a kettle cover at the top of kettle, top side at kettle cover is provided with a charging aperture, top opposite side at kettle cover is provided with a distillation mouth, it is provided with a discharging opening in the bottom of kettle, described distillation mouth is connected with the inlet end of vacuum pump by pipeline, the outlet side of vacuum pump is connected with the entrance of condenser by pipeline, described kettle includes the cylinder of a both ends open setting and by the Flange joint cone in cylinder bottom, described discharging opening is located at the bottom of cone.
Described heating arrangements includes the cylinder heating arrangements being located at outside cylinder and is located at the cone heating mechanism outside cone.
Described stirring system includes the shaft being located at kettle inner chamber along kettle axis direction, described shaft includes the cylinder shaft being located in cylinder and the cone shaft being located in cone, the bottom of cylinder shaft is connected with the top of cone shaft, the top of cylinder shaft is connected with drive mechanism after passing kettle cover, on cylinder shaft, spiral winding is shaped with the double ribbon of cylinder, top spiral winding at cone shaft is shaped with the double ribbon of cone, the stirring sheet of a triangle it is provided with in the bottom of cone shaft, the described dual-side of stirring sheet is paralleled with the medial wall of cone.
Described cylinder heating arrangements includes the cylinder chuck being sheathed on outside cylinder, form cylinder heating cavity between described cylinder chuck and cylinder lateral wall, be respectively equipped with a cylinder jacket steam entrance being connected with cylinder heating cavity and a cylinder chuck condensation-water drain at the top of cylinder chuck with bottom side.
Described cone heating mechanism includes the cone chuck being sheathed on outside cone, form cone heating cavity between described cone chuck and cone lateral wall, be respectively equipped with a cone jacket steam entrance being connected with cone heating cavity and a cone chuck condensation-water drain at the top of cone chuck with bottom side.
Described drive mechanism includes that a motor, described motor are connected through the top of a reductor with cylinder shaft.
The double ribbon of described cylinder includes ribbon and the outer ribbon of cylinder in cylinder, in cylinder, the centrage of ribbon and the outer ribbon of cylinder forms along the circular helix coiling of line centered by cylinder shaft, in described cylinder, the inner side edge of ribbon is fixed on cylinder shaft, the quantity of the outer ribbon of described cylinder is two, the outer ribbon of two cylinders be wound on cylinder along cylinder shaft axially symmetric in the outside of ribbon, the outer ribbon of two cylinders is connected with cylinder shaft by the outer ribbon support bar of cylinder respectively.
The double ribbon of described cone includes ribbon and the outer ribbon of cone in cone, in cone, the centrage of ribbon and the outer ribbon of cone forms along the conical spiral coiling of line centered by cone shaft, in described cone, the inner side edge of ribbon is fixed on cone shaft, the quantity of the outer ribbon of described cone is two, the outer ribbon of two cones be wound on cone along cone shaft axially symmetric in the outside of ribbon, the outer ribbon of two cones is connected with cone shaft by the outer ribbon support bar of cone respectively.
The outer side edges of the outer ribbon of described two cylinders is all close to cylinder medial wall and is arranged, and the outer side edges of the outer ribbon of described two cones is close to cone medial wall and is arranged, and the dual-side of described stirring sheet is close to cone medial wall and is arranged.
In described cylinder, in ribbon and cone, ribbon is left-handed ribbon, and the outer ribbon of described cylinder is identical with the pitch difference of ribbon in cone with pitch and the cone ribbon outward of ribbon in cylinder, and shaft is rotationally clockwise.
The beneficial effects of the utility model are:
(1) vacuum pump is to making nitromethane waste water distill under negative pressure state after kettle evacuation, reduces vapo(u)rizing temperature, shortens distillation time, saves steam energy.
(2), after the nitromethane in kettle and waste water are evaporated, sodium sulfate can directly flow out from kettle bottom drain hole in powder, and the sodium sulfate appearance color that this equipment processes is preferable, later sale.
(3) in still-process, feed liquid near shaft pushes away under interior ribbon and moves downward under effect, a part is spilled over entering the ribbon face of outer ribbon, making material be inclined upwardly along ribbon face or dish out, the material rising to kettle top flows downward again by the promotion with outer ribbon of conducting oneself with dignity, and forms recycle stream inside and outside, upper and lower, make full-bodied sodium sulfate material be blended, convective motion, making material mix homogeneously, character is homogeneous, it is ensured that material thermally equivalent.
(4) when processing, kettle uses hands-off operation, processing the toxic gas produced during sodium sulfate can process with centralized collection, it is possible to achieve the zero-emission of harmful gas, it is to avoid toxic gas evaporate in air and pollutes production environment.
(5) steam in sodium sulfate processing procedure etc. are collected in special container by condenser condensation, and in the aqueous solution collected, major part is water, and these aqueous solutions can be used further to produce, it is achieved that the recycling of waste water.
The outer side edges of the outer ribbon of (6) two cylinders is all close to cylinder medial wall and is arranged, the outer side edges of the outer ribbon of two cones is close to cone medial wall and is arranged, the dual-side of stirring sheet is close to cone medial wall and is arranged, can strike off by getting rid of the thickness sodium sulfate in cylinder and cone medial wall, re-mix with the material in kettle.
(7) cylinder and cone and cylinder shaft mouth and the split-type design of cone shaft, the convenient detachable maintaining when equipment breaks down.
(8) solid sodium sulfate that the distillation in the cone design of kettle bottom makes kettle completes to obtain can be released smoothly in kettle.
(9) with traditional treatment method in, need after nitromethane waste water is concentrated again to add water in reactor, make sodium sulfate be diluted to pasty state to discharge from autoclave body bottom, it is re-fed into centrifuge to be again dehydrated and compare, the product of this utility model nitromethane synthetic reaction separates and drying equipment simplifies operation, save equipment investment, save substantial amounts of manpower and materials, beneficially popularization and application.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings this utility model is further described.
Fig. 1 is structural representation of the present utility model.
In figure, 1, vacuum pump, 2, condenser, 3, kettle cover, 4, charging aperture, 5, distillation mouth, 6, discharging opening, 7, cylinder, 8, cone, 9, cylinder shaft mouth, 10, cone shaft, 11, stirring sheet, 12, cylinder chuck, 13, cylinder heating cavity, 14, cylinder jacket steam entrance, 15, cylinder chuck condensation-water drain, 16, cone chuck, 17, cone heating cavity, 18, cone jacket steam entrance, 19, cone chuck condensation-water drain, 20, motor, 21, reductor, 22, ribbon in cylinder, 23, the outer ribbon of cylinder, 24, the outer ribbon support bar of cylinder, 25, ribbon in cone, 26, the outer ribbon of cone, 27, the outer ribbon support bar of cone.
Detailed description of the invention
For the technical characterstic of this programme can be clearly described, below by detailed description of the invention, and combining its accompanying drawing, the utility model is elaborated.
As shown in fig. 1, this embodiment includes kettle, vacuum pump 1 and condenser 2, kettle outside be provided with a heating arrangements, it is provided with a stirring system in the inner side of kettle, a kettle cover 3 it is provided with at the top of kettle, top side at kettle cover 3 is provided with a charging aperture 4, top opposite side at kettle cover 3 is provided with a distillation mouth 5, a discharging opening 6 it is provided with in the bottom of kettle, described distillation mouth 5 is connected by the inlet end of pipeline with vacuum pump 1, the outlet side of vacuum pump 1 is connected with the entrance of condenser 2 by pipeline, described kettle includes the cylinder 7 of a both ends open setting and by the Flange joint cone 8 in cylinder 7 bottom, described discharging opening 6 is located at the bottom of cone 8.
Described heating arrangements includes the cylinder heating arrangements being located at outside cylinder 7 and is located at the cone heating mechanism outside cone 8.
Described stirring system includes the shaft being located at kettle inner chamber along kettle axis direction, described shaft includes the cylinder shaft 9 being located in cylinder 7 and the cone shaft 10 being located in cone 8, the bottom of cylinder shaft 9 is connected with the top of cone shaft 10, the top of cylinder shaft 9 is connected with drive mechanism after passing kettle cover 3, on cylinder shaft 9, spiral winding is shaped with the double ribbon of cylinder, top spiral winding at cone shaft 10 is shaped with the double ribbon of cone, the stirring sheet 11 of a triangle it is provided with in the bottom of cone shaft 10, the dual-side of described stirring sheet 11 is paralleled with the medial wall of cone 8.
Described cylinder heating arrangements includes the cylinder chuck 12 being sheathed on outside cylinder 7, form cylinder heating cavity 13 between described cylinder chuck 12 and cylinder 7 lateral wall, be respectively equipped with the cylinder jacket steam entrance 14 being connected with cylinder heating cavity 13 and a cylinder chuck condensation-water drain 15 at the top of cylinder chuck 12 with bottom side.
Described cone heating mechanism includes the cone chuck 16 being sheathed on outside cone 8, form cone heating cavity 17 between described cone chuck 16 and cone 8 lateral wall, be respectively equipped with the cone jacket steam entrance 18 being connected with cone heating cavity 17 and a cone chuck condensation-water drain 19 at the top of cone chuck 16 with bottom side.
Described drive mechanism includes that a motor 20, described motor 20 are connected with the top of cylinder shaft 9 through a reductor 21.
The double ribbon of described cylinder includes ribbon 22 and the outer ribbon 23 of cylinder in cylinder, in cylinder, the centrage of ribbon 22 and the outer ribbon 23 of cylinder forms along the circular helix coiling of line centered by cylinder shaft 9, in described cylinder, the inner side edge of ribbon 22 is fixed on cylinder shaft 9, the quantity of the outer ribbon 23 of described cylinder is two, the outer ribbon 23 of two cylinders be wound on cylinder along cylinder shaft 9 axially symmetric in the outside of ribbon 22, the outer ribbon 23 of two cylinders is connected with cylinder shaft 9 by the outer ribbon support bar 24 of cylinder respectively.
The double ribbon of described cone includes ribbon 25 and the outer ribbon 26 of cone in cone, in cone, the centrage of ribbon 25 and the outer ribbon 26 of cone forms along the conical spiral coiling of line centered by cone shaft 10, in described cone, the inner side edge of ribbon 25 is fixed on cone shaft 10, the quantity of the outer ribbon 26 of described cone is two, the outer ribbon 26 of two cones be wound on cone along cone shaft 10 axially symmetric in the outside of ribbon 25, the outer ribbon 26 of two cones is connected with cone shaft 10 by the outer ribbon support bar 27 of cone respectively.
The outer side edges of the outer ribbon 23 of described two cylinders is all close to cylinder 7 medial wall and is arranged, and the outer side edges of the outer ribbon 26 of described two cones is close to cone 8 medial wall and is arranged, and the dual-side of described stirring sheet 11 is close to cone 8 medial wall and is arranged.
In described cylinder, in ribbon 22 and cone, ribbon 25 is left-handed ribbon, and the outer ribbon 23 of described cylinder is identical with the pitch difference of ribbon in cone 25 with the pitch of ribbon in cylinder 22 and cone ribbon 26 outward, and shaft is rotationally clockwise.
During production, the nitromethane waste water of sulfur acid sodium enters into kettle inner chamber by the charging aperture 4 at kettle cover 3 top, in cylinder heating cavity 13 and cone heating cavity 17, it is passed through steam the most respectively by the cylinder jacket steam entrance 14 on cylinder chuck 12 and the cone jacket steam entrance 18 on cone chuck 16, nitromethane waste water in kettle is added thermal distillation, still-process ensureing, the temperature of nitromethane waste water controls between 80 DEG C-120 DEG C.The distillation mouth 5 at kettle cover 3 top is connected with the inlet end of vacuum pump 1, nitromethane in waste water and water heating are extracted out through vacuum pump 1 in kettle by distillation mouth 5 after being distilled into gaseous state, the condensation liquefaction under the condensation of condenser 2 of the Gaseous materials containing nitromethane that vacuum pump 1 is extracted out is collected, when the waste water in kettle is evaporated after sodium sulfate becomes pressed powder, solid sodium sulfate is discharged by discharging opening 6, it is achieved that nitromethane separates with sodium sulfate and being dried of sodium sulfate.
The product of this utility model nitromethane synthetic reaction separates and drying equipment, compared with traditional nitromethane product separation equipment, has the advantage that
(1) vacuum pump 1 is to making nitromethane waste water distill under negative pressure state after kettle evacuation, reduces vapo(u)rizing temperature, shortens distillation time, saves steam energy.
(2), after the nitromethane in kettle and waste water are evaporated, sodium sulfate can directly flow out from kettle bottom drain hole in powder, and the sodium sulfate appearance color that this equipment processes is preferable, later sale.
(3) in still-process, feed liquid near shaft pushes away under interior ribbon and moves downward under effect, a part is spilled over entering the ribbon face of outer ribbon, making material be inclined upwardly along ribbon face or dish out, the material rising to kettle top flows downward again by the promotion with outer ribbon of conducting oneself with dignity, and forms recycle stream inside and outside, upper and lower, make full-bodied sodium sulfate material be blended, convective motion, making material mix homogeneously, character is homogeneous, it is ensured that material thermally equivalent.
(4) when processing, kettle uses hands-off operation, processing the toxic gas produced during sodium sulfate can process with centralized collection, it is possible to achieve the zero-emission of harmful gas, it is to avoid toxic gas evaporate in air and pollutes production environment.
(5) steam in sodium sulfate processing procedure etc. are collected in special container by condenser condensation, and in the aqueous solution collected, major part is water, and these aqueous solutions can be used further to produce, it is achieved that the recycling of waste water.
The outer side edges of the outer ribbon 23 of (6) two cylinders is all close to cylinder 7 medial wall and is arranged, the outer side edges of the outer ribbon 26 of two cones is close to cone 8 medial wall and is arranged, the dual-side of stirring sheet 11 is close to cone 8 medial wall and is arranged, can strike off by getting rid of the thickness sodium sulfate at cylinder 7 and cone 8 medial wall, re-mix with the material in kettle.
(7) cylinder 7 and cone 8 and cylinder shaft mouth 9 and the split-type design of cone shaft 10, the convenient detachable maintaining when equipment breaks down.
(8) solid sodium sulfate that the distillation in cone 8 design of kettle bottom makes kettle completes to obtain can be released smoothly in kettle.
(9) with traditional treatment method in, need after nitromethane waste water is concentrated again to add water in reactor, make sodium sulfate be diluted to pasty state to discharge from autoclave body bottom, it is re-fed into centrifuge to be again dehydrated and compare, the product of this utility model nitromethane synthetic reaction separates and drying equipment simplifies operation, save equipment investment, save substantial amounts of manpower and materials, beneficially popularization and application.
This utility model does not describes part in detail, is the known technology of those skilled in the art of the present technique.Finally illustrate is, above example is only in order to illustrate the technical solution of the utility model and unrestricted, although this utility model being described in detail with reference to preferred embodiment, it will be understood by those within the art that, the technical solution of the utility model can be modified or equivalent, without deviating from objective and the scope of technical solutions of the utility model, it all should be contained in the middle of right of the present utility model.
Claims (10)
1. the product of a nitromethane synthetic reaction separates and drying equipment, it is characterized in that: include kettle, vacuum pump and condenser, it is provided with a heating arrangements in the outside of kettle, it is provided with a stirring system in the inner side of kettle, it is provided with a kettle cover at the top of kettle, top side at kettle cover is provided with a charging aperture, top opposite side at kettle cover is provided with a distillation mouth, it is provided with a discharging opening in the bottom of kettle, described distillation mouth is connected with the inlet end of vacuum pump by pipeline, the outlet side of vacuum pump is connected with the entrance of condenser by pipeline, described kettle includes the cylinder of a both ends open setting and by the Flange joint cone in cylinder bottom, described discharging opening is located at the bottom of cone.
The product of a kind of nitromethane synthetic reaction the most according to claim 1 separates and drying equipment, it is characterized in that: described heating arrangements includes the cylinder heating arrangements being located at outside cylinder and is located at the cone heating mechanism outside cone.
The product of a kind of nitromethane synthetic reaction the most according to claim 1 separates and drying equipment, it is characterized in that: described stirring system includes being located at the shaft of kettle inner chamber along kettle axis direction, described shaft includes the cylinder shaft being located in cylinder and the cone shaft being located in cone, the bottom of cylinder shaft is connected with the top of cone shaft, the top of cylinder shaft is connected with drive mechanism after passing kettle cover, on cylinder shaft, spiral winding is shaped with the double ribbon of cylinder, top spiral winding at cone shaft is shaped with the double ribbon of cone, the stirring sheet of a triangle it is provided with in the bottom of cone shaft, the described dual-side of stirring sheet is paralleled with the medial wall of cone.
The product of a kind of nitromethane synthetic reaction the most according to claim 2 separates and drying equipment, it is characterized in that: described cylinder heating arrangements includes the cylinder chuck being sheathed on outside cylinder, form cylinder heating cavity between described cylinder chuck and cylinder lateral wall, be respectively equipped with a cylinder jacket steam entrance being connected with cylinder heating cavity and a cylinder chuck condensation-water drain at the top of cylinder chuck with bottom side.
The product of a kind of nitromethane synthetic reaction the most according to claim 2 separates and drying equipment, it is characterized in that: described cone heating mechanism includes the cone chuck being sheathed on outside cone, form cone heating cavity between described cone chuck and cone lateral wall, be respectively equipped with a cone jacket steam entrance being connected with cone heating cavity and a cone chuck condensation-water drain at the top of cone chuck with bottom side.
The product of a kind of nitromethane synthetic reaction the most according to claim 3 separates and drying equipment, it is characterized in that: described drive mechanism includes that a motor, described motor are connected through the top of a reductor with cylinder shaft.
The product of a kind of nitromethane synthetic reaction the most according to claim 3 separates and drying equipment, it is characterized in that: the double ribbon of described cylinder includes ribbon and the outer ribbon of cylinder in cylinder, in cylinder, the centrage of ribbon and the outer ribbon of cylinder forms along the circular helix coiling of line centered by cylinder shaft, in described cylinder, the inner side edge of ribbon is fixed on cylinder shaft, the quantity of the outer ribbon of described cylinder is two, the outer ribbon of two cylinders be wound on cylinder along cylinder shaft axially symmetric in the outside of ribbon, the outer ribbon of two cylinders is connected with cylinder shaft by the outer ribbon support bar of cylinder respectively.
The product of a kind of nitromethane synthetic reaction the most according to claim 7 separates and drying equipment, it is characterized in that: the double ribbon of described cone includes ribbon and the outer ribbon of cone in cone, in cone, the centrage of ribbon and the outer ribbon of cone forms along the conical spiral coiling of line centered by cone shaft, in described cone, the inner side edge of ribbon is fixed on cone shaft, the quantity of the outer ribbon of described cone is two, the outer ribbon of two cones be wound on cone along cone shaft axially symmetric in the outside of ribbon, the outer ribbon of two cones is connected with cone shaft by the outer ribbon support bar of cone respectively.
The product of a kind of nitromethane synthetic reaction the most according to claim 8 separates and drying equipment, it is characterized in that: the outer side edges of the outer ribbon of described two cylinders is all close to cylinder medial wall and is arranged, the outer side edges of the outer ribbon of described two cones is close to cone medial wall and is arranged, and the dual-side of described stirring sheet is close to cone medial wall and is arranged.
The product of a kind of nitromethane synthetic reaction the most according to claim 8 separates and drying equipment, it is characterized in that: in described cylinder, in ribbon and cone, ribbon is left-handed ribbon, the outer ribbon of described cylinder is identical with the pitch difference of ribbon in cone with pitch and the outer ribbon of cone of ribbon in cylinder, and shaft is rotationally clockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620202550.6U CN205419831U (en) | 2016-03-16 | 2016-03-16 | Result separation and drying equipment of nitromethane building -up reactions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620202550.6U CN205419831U (en) | 2016-03-16 | 2016-03-16 | Result separation and drying equipment of nitromethane building -up reactions |
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| CN205419831U true CN205419831U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620202550.6U Active CN205419831U (en) | 2016-03-16 | 2016-03-16 | Result separation and drying equipment of nitromethane building -up reactions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107490279A (en) * | 2017-08-17 | 2017-12-19 | 江南大学 | A kind of vacuum cyclone drying device for being used to dry heat sensitive material |
| CN118221529A (en) * | 2024-05-24 | 2024-06-21 | 浙江华佐天翼化工科技有限公司 | Method and device for continuously preparing nitromethane |
-
2016
- 2016-03-16 CN CN201620202550.6U patent/CN205419831U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107490279A (en) * | 2017-08-17 | 2017-12-19 | 江南大学 | A kind of vacuum cyclone drying device for being used to dry heat sensitive material |
| CN118221529A (en) * | 2024-05-24 | 2024-06-21 | 浙江华佐天翼化工科技有限公司 | Method and device for continuously preparing nitromethane |
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