CN107469376A - A kind of energy-efficient chemical separating bubble column - Google Patents
A kind of energy-efficient chemical separating bubble column Download PDFInfo
- Publication number
- CN107469376A CN107469376A CN201710865582.3A CN201710865582A CN107469376A CN 107469376 A CN107469376 A CN 107469376A CN 201710865582 A CN201710865582 A CN 201710865582A CN 107469376 A CN107469376 A CN 107469376A
- Authority
- CN
- China
- Prior art keywords
- belt wheel
- belt
- rotating bar
- inlet cylinder
- rotary shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000126 substance Substances 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000003756 stirring Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 239000006260 foam Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 29
- 239000010410 layer Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002365 multiple layer Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/16—Fractionating columns in which vapour bubbles through liquid
- B01D3/18—Fractionating columns in which vapour bubbles through liquid with horizontal bubble plates
- B01D3/20—Bubble caps; Risers for vapour; Discharge pipes for liquid
- B01D3/205—Bubble caps
-
- 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
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/32—Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses a kind of energy-efficient chemical separating bubble column, including tower body, also include bubble-cap mechanism and the transmission mechanism for driving bubble-cap to rotate, the transmission mechanism mechanism installed in tower body top includes motor, first pulley, second belt wheel and the 3rd belt wheel, second belt wheel has two, the bottom of second belt wheel and the 3rd belt wheel is mounted on main rotating bar, and one end of main rotating bar extends to the inside of tower body, the bubble-cap mechanism includes blister body, rotary shaft, from rotating bar, inlet cylinder and stirring jaw, the top of the rotary shaft and the top inwall of blister body are fixed, the top of inlet cylinder and the bottom of rotary shaft are rotatablely connected, it is fixedly connected from the top of rotating bar with the bottom of rotary shaft, the stirring jaw has six.Design structure of the present invention is reasonable, simple to operate, can effectively realize merging for gas and liquid, and can improve the efficiency that gas exchanges with liquid heat energy.
Description
Technical field
The present invention relates to bubble column technical field, more particularly to a kind of energy-efficient chemical separating bubble column.
Background technology
Traditional bubble column is commonly used to make steam (or gas) and liquid close contact promote its mutual mass transfer
Effect.Tower has several short tubes for supplying steam (or gas) to pass through built with multiple-layer horizontal column plate on plate, thereon each covering root edge
There is the bubble-cap of slot or sulculus, and overflow pipe is housed.During operation, liquid is continuously entered by the top of tower, through under overflow pipe step by step tray
Drop, and accumulate liquid layer on each plate, form fluid-tight；Steam (or gas) is then entered by bottom of towe, via the slot on bubble-cap root edge
Or sulculus is dispersed into minute bubbles, fully contacted with liquid, and liquid level is reached through liquid layer, then rise up into last layer column plate.It is short
Pipe is in tower, overflow-type in title；Also have outside tower, claim outer overflow-type.Bubble column is widely used in rectifying and gas is inhaled
Receive.
Bubble-cap in traditional bubble column is fixedly mounted on column plate, and gas simply connects with the partially liq around bubble-cap
Touch, gas itself is low with the efficiency that liquid merges, and easily causes the liquid around gas and reaches saturation, and liquid is in low stream
Fast state, exchangeability is poor, especially for the gas with heat, it is necessary to fluid exchange heat, traditional bubble-cap be it is fixed,
It is low with efficiency on heat transfer merging, cause energy to pass to low, the effect of column plate is that have liquid layer in plate face, in order that gas
Contact area with fluid exchange is big, and traditional column plate is onboard to be provided with spout hole, causes the area of pedal to reduce, so as to
Reduce exchange efficiency.
The content of the invention
The invention aims to solve shortcoming present in prior art, and a kind of energy-efficient chemical industry proposed divides
From with bubble column.
To achieve these goals, present invention employs following technical scheme：
A kind of energy-efficient chemical separating bubble column, including tower body, in addition to
Bubble-cap mechanism and the transmission mechanism for driving bubble-cap to rotate；
The transmission mechanism mechanism installed in tower body top includes motor, first pulley, the second belt wheel and the 3rd belt wheel,
Second belt wheel has two, and the bottom of second belt wheel and the 3rd belt wheel is mounted on main rotating bar, and main rotating bar
One end extends to the inside of tower body；
The bubble-cap mechanism includes blister body, rotary shaft, from rotating bar, inlet cylinder and stirring jaw, the rotary shaft
The top inwall of top and blister body is fixed, and the top of inlet cylinder and the bottom of rotary shaft are rotatablely connected, from the top of rotating bar
End is fixedly connected with the bottom of rotary shaft, and the stirring jaw has six, and stirring jaw is uniformly arranged on the bottom of blister body.
Preferably, the first pulley and the output axis connection of motor, the second belt wheel have two belt grooves, first pulley
One belt grooves of belt grooves and second belt wheel are connected with belt, another belt grooves of second belt wheel and another
One belt grooves of the second belt wheel are connected with belt, another belt grooves of another the second belt wheel and the belt grooves of the 3rd belt wheel
Also it is connected with belt.
Preferably, the top of the inlet cylinder offers neck, and the bottom of rotary shaft is extended in neck, and rotary shaft is work
Character form structure, neck are inverted T-shape structure, and the vertical inner wall of neck is provided with bearing, and rotary shaft passes through bearing and inlet cylinder
Top is rotatablely connected.
Preferably, the inlet cylinder is inverted T-shape structure, and inlet cylinder offers through hole, is passed through from one end of rotating bar logical
Hole, it is fixedly connected with the rotating shaft from one end of rotating bar, the lower section of inlet cylinder, and stirring jaw is extended to from the other end of rotating bar
Lower edge be higher than inlet cylinder lower edge.
Preferably, the stirring jaw is inverted L-shaped structure, and multiple air admission holes and multiple are offered on the vertical plane of inlet cylinder
Spout hole, for multiple air inlet positions in same plane, multiple spout holes are also at same plane, and air admission hole is located at the upper of spout hole
Side, the vertical wall bottom of blister body offer multiple foam holes, and the height of foam hole is smaller than the height of spout hole, and air admission hole
Diameter be more than spout hole diameter.
Preferably, graphite cake is installed, the bottom of inlet cylinder and the top of graphite cake are fixed between the inwall of the tower body.
Preferably, the bottom of the tower body is provided with drain pipe, and the side bottom and side top of tower body are separately installed with
Air inlet pipe and escape pipe, the opposite side top of tower body are provided with feed tube.
Beneficial effects of the present invention：
1st, by motor, first pulley, the second belt wheel, the 3rd belt wheel, stirring jaw, main rotating bar and from rotating bar, realize
The rotation of blister body, so as to drive stirring jaw to stir in a liquid so that the exchangeability of gas and liquid is more efficient, will be whole
Liquid on individual graphite cake can be swapped quickly with the liquid near bubble-cap, greatly improve gas fusion efficiencies and heat exchange
Ability.
2nd, traditional overfall is opened on graphite cake, cause liquid area reduce, the design by overfall be opened in into
Inflator, can solve the problems, such as pedal because area reduces influences gas-liquid exchange efficiency, so as to improve production efficiency.
The design is rational in infrastructure, simple to operate, can effectively realize merging for gas and liquid, and can improve gas
The efficiency exchanged with liquid heat energy.
Brief description of the drawings
Fig. 1 is a kind of structural representation of energy-efficient chemical separating bubble column proposed by the present invention；
Fig. 2 is a kind of blister configuration schematic diagram of energy-efficient chemical separating bubble column proposed by the present invention；
Fig. 3 is a kind of bubble-cap overlooking the structure diagram of energy-efficient chemical separating bubble column proposed by the present invention.
In figure：1 tower body, 2 feed tubes, 3 main rotating bars, 4 the 3rd belt wheels, 5 second belt wheels, 6 first pulleys, 7 motors, 8 go out
Tracheae, 9 graphite cakes, 10 air inlet pipe, 11 drain pipes, 12 rotary shafts, 13 blister bodies, 14 stirring jaws, 15 are from rotating bar, 16 air inlets
Cylinder, a foam holes, b spout holes, c air admission holes.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
Reference picture 1-3, a kind of energy-efficient chemical separating bubble column, including tower body 1, in addition to bubble-cap mechanism and be used for
The transmission mechanism for driving bubble-cap to rotate；
Transmission mechanism mechanism installed in the top of tower body 1 includes motor 7, first pulley 6, the second belt wheel 5 and the 3rd belt wheel
4, the second belt wheel 5 has two, and the bottom of the second belt wheel 5 and the 3rd belt wheel 4 is mounted on main rotating bar 3, and the one of main rotating bar 3
End extends to the inside of tower body 1；
Bubble-cap mechanism includes blister body 13, rotary shaft 12, from rotating bar 15, inlet cylinder 16 and stirring jaw 14, rotary shaft
12 top and the top inwall of blister body 13 are fixed, and the top of inlet cylinder 16 is rotatablely connected with the bottom of rotary shaft 12, from
The top of rotating bar 15 is fixedly connected with the bottom of rotary shaft 12, and stirring jaw 14 has six, and stirring jaw 14 is uniformly arranged on bubble
The bottom of cover body 13.
In the present embodiment, first pulley 6 and the output axis connection of motor 7, the second belt wheel 5 have two belt grooves, first band
The belt grooves of wheel 6 are connected with belt, another belt grooves of second belt wheel 5 with a belt grooves of second belt wheel 5
Belt is connected with a belt grooves of another the second belt wheel 5, another belt grooves and the 3rd band of another the second belt wheel 5
The belt of wheel 4 is also connected with belt, and motor 7 drives first pulley 6, first pulley 6 by one the second belt wheel 5 of belt drive,
One the second belt wheel 5 is by another belt wheel 5 of belt drive, and another belt wheel 5 is by the belt wheel 4 of belt drive the 3rd, so as to main
Rotating bar 3 is rotated, and main rotating bar 3 drives the blister body 13 of top layer to rotate, and blister body 13 is driven from turning by rotary shaft 12
Lever 15, next layer of blister body 13 is driven from rotating bar 15, so as to one layer of drive opposite side, realize that multilayer bubble-cap turns together
Dynamic, cost is low, can effectively realize merging for gas and liquid, and can improve the efficiency that gas exchanges with liquid heat energy；
The top of inlet cylinder 16 offers neck, and the bottom of rotary shaft 12 is extended in neck, and rotary shaft 12 is I-shaped
Structure, neck are inverted T-shape structure, and the vertical inner wall of neck is provided with bearing, and rotary shaft 12 passes through bearing and inlet cylinder 16
Top is rotatablely connected, and inlet cylinder 16 is inverted T-shape structure, and inlet cylinder 16 offers through hole, is passed through from one end of rotating bar 15 logical
Hole, it is fixedly connected from one end of rotating bar 15 with rotary shaft 12, the lower section of inlet cylinder 16 is extended to from the other end of rotating bar 15,
And the lower edge of stirring jaw 14 is higher than the lower edge of inlet cylinder 16, stirring jaw 14 is inverted L-shaped structure, the vertical plane of inlet cylinder 16
On offer multiple air admission hole c and multiple spout hole b, multiple air admission hole c are in same plane, and multiple spout hole b are also at together
One plane, air admission hole c are located at spout hole b top, and the vertical wall bottom of blister body 13 offers multiple foam hole a, foaming
Hole a height is smaller than spout hole b height, and air admission hole c diameter is more than spout hole b diameter, pacifies between the inwall of tower body 1
Equipped with graphite cake 9, the bottom and the top of graphite cake 9 of inlet cylinder 16 are fixed, and the bottom of tower body 1 is provided with drain pipe 11, tower body 1
Side bottom and side top be separately installed with air inlet pipe 10 and escape pipe 8, the opposite side top of tower body 1 is provided with feed tube
2, gas is passed into tower body 1 from air inlet pipe 10, and liquid enters the inner tip of tower body 1, such as Fig. 1, whole tower body from feed tube 2
1 inside is provided with multiple mechanisms such as Fig. 1, and graphite cake 9 has multilayer, and gas rises upwards from the bottom of tower body 1, liquid from
The top of tower body 1 to flow down, bubble-cap of the gas first with first layer graphite cake 9 contacts, gas enter inlet cylinder 16 in, gas from
Air admission hole c is entered in blister body 13, because liquid is from overfall b outflows, so the height of liquid level is higher than foam hole a, from
And ensure gas by liquid from foam hole a flow out, form many bubbles, so as to and fluid exchange, gas enter upper side, liquid
Body enters next layer, and remaining gas is discharged from escape pipe 8, and liquid is discharged from drain pipe 11.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (7)
1. a kind of energy-efficient chemical separating bubble column, including tower body (1), it is characterised in that：
Also include
Bubble-cap mechanism and the transmission mechanism for driving bubble-cap to rotate；
Installed in tower body (1) top the transmission mechanism mechanism include motor (7), first pulley (6), the second belt wheel (5) and
3rd belt wheel (4), second belt wheel (5) have two, and the bottom of second belt wheel (5) and the 3rd belt wheel (4) is mounted on
Main rotating bar (3), and one end of main rotating bar (3) extends to the inside of tower body (1)；
The bubble-cap mechanism includes blister body (13), rotary shaft (12), from rotating bar (15), inlet cylinder (16) and stirring jaw
(14), the top of the rotary shaft (12) and the top inwall of blister body (13) are fixed, the top of inlet cylinder (16) and rotation
The bottom rotation connection of axle (12), is fixedly connected, the stirring jaw from the top of rotating bar (15) with the bottom of rotary shaft (12)
(14) there are six, and stirring jaw (14) is uniformly arranged on the bottom of blister body (13).
A kind of 2. energy-efficient chemical separating bubble column according to claim 1, it is characterised in that the first pulley
(6) have two belt grooves with the output axis connection of motor (7), the second belt wheel (5), the belt grooves of first pulley (6) with one the
One belt grooves of two belt wheels (5) are connected with belt, another belt grooves of second belt wheel (5) and another second belt wheel
(5) a belt grooves are connected with belt, another belt grooves of another the second belt wheel (5) and the belt of the 3rd belt wheel (4)
Also it is connected with belt.
A kind of 3. energy-efficient chemical separating bubble column according to claim 1, it is characterised in that the inlet cylinder
(16) top offers neck, and the bottom of rotary shaft (12) is extended in neck, and rotary shaft (12) is I-shape construction, neck
For inverted T-shape structure, the vertical inner wall of neck is provided with bearing, and rotary shaft (12) is turned by the top of bearing and inlet cylinder (16)
Dynamic connection.
A kind of 4. energy-efficient chemical separating bubble column according to claim 1, it is characterised in that the inlet cylinder
(16) it is inverted T-shape structure, inlet cylinder (16) offers through hole, through hole passed through from one end of rotating bar (15), from rotating bar
(15) one end is fixedly connected with rotary shaft (12), and the lower section of inlet cylinder (16) is extended to from the other end of rotating bar (15), and
The lower edge of stirring jaw (14) is higher than the lower edge of inlet cylinder (16).
A kind of 5. energy-efficient chemical separating bubble column according to claim 1, it is characterised in that the stirring jaw
(14) it is inverted L-shaped structure, multiple air admission holes (c) and multiple spout holes (b) is offered on the vertical plane of inlet cylinder (16), it is multiple
Air admission hole (c) is in same plane, and multiple spout holes (b) are also at same plane, and air admission hole (c) is located at the upper of spout hole (b)
Side, the vertical wall bottom of blister body (13) offer multiple foam holes (a), the height of the height of foam hole (a) than spout hole (b)
Spend it is small, and the diameter of air admission hole (c) be more than spout hole (b) diameter.
A kind of 6. energy-efficient chemical separating bubble column according to claim 1, it is characterised in that the tower body (1)
Inwall between graphite cake (9) is installed, the bottom and the top of graphite cake (9) of inlet cylinder (16) are fixed.
A kind of 7. energy-efficient chemical separating bubble column according to claim 1, it is characterised in that the tower body (1)
Bottom drain pipe (11) is installed, the side bottom and side top of tower body (1) are separately installed with air inlet pipe (10) and outlet
Manage (8), the opposite side top of tower body (1) is provided with feed tube (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710865582.3A CN107469376A (en) | 2017-09-22 | 2017-09-22 | A kind of energy-efficient chemical separating bubble column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710865582.3A CN107469376A (en) | 2017-09-22 | 2017-09-22 | A kind of energy-efficient chemical separating bubble column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107469376A true CN107469376A (en) | 2017-12-15 |
Family
ID=60586348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710865582.3A Pending CN107469376A (en) | 2017-09-22 | 2017-09-22 | A kind of energy-efficient chemical separating bubble column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107469376A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110420475A (en) * | 2019-08-21 | 2019-11-08 | 姚传亮 | A kind of board-like fractionating column |
| CN113772763A (en) * | 2021-10-08 | 2021-12-10 | 江西泓锐机械工业制造有限公司 | Environment-friendly utilization equipment for heat treatment wastewater |
| CN114470839A (en) * | 2022-02-15 | 2022-05-13 | 全椒科利德电子材料有限公司 | High-purity propylene electron gas is heat exchange vary voltage rectification equipment with imitating by force |
| CN114470843A (en) * | 2022-03-03 | 2022-05-13 | 宿迁新亚科技有限公司 | Rectifying device and rectifying process for N-methylformamide |
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| GB791708A (en) * | 1955-11-03 | 1958-03-12 | Otto & Co Gmbh Dr C | Improvements in bubble-tray columns |
| CN201701770U (en) * | 2010-06-11 | 2011-01-12 | 九江力山环保科技有限公司 | Tower internal reflux distributor |
| CN204994592U (en) * | 2015-07-29 | 2016-01-27 | 安徽宏亮饲料科技有限公司 | Fodder grease adds jar |
| CN105327657A (en) * | 2014-08-11 | 2016-02-17 | 中石化洛阳工程有限公司 | Overflow-type gas-liquid distributor |
| CN105363236A (en) * | 2015-12-10 | 2016-03-02 | 南通山剑防腐科技有限公司 | Efficient energy-saving bubble-cap tower |
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| CN106478907A (en) * | 2016-11-25 | 2017-03-08 | 无锡同心塑料制品有限公司 | A kind of polyurethane foam reaction former |
| CN207203512U (en) * | 2017-09-22 | 2018-04-10 | 济宁新创化工科技有限公司 | A kind of energy-efficient chemical separating bubble column |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB791708A (en) * | 1955-11-03 | 1958-03-12 | Otto & Co Gmbh Dr C | Improvements in bubble-tray columns |
| CN201701770U (en) * | 2010-06-11 | 2011-01-12 | 九江力山环保科技有限公司 | Tower internal reflux distributor |
| CN105327657A (en) * | 2014-08-11 | 2016-02-17 | 中石化洛阳工程有限公司 | Overflow-type gas-liquid distributor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110420475A (en) * | 2019-08-21 | 2019-11-08 | 姚传亮 | A kind of board-like fractionating column |
| CN113772763A (en) * | 2021-10-08 | 2021-12-10 | 江西泓锐机械工业制造有限公司 | Environment-friendly utilization equipment for heat treatment wastewater |
| CN113772763B (en) * | 2021-10-08 | 2023-08-29 | 江西铂格洛智能制造有限公司 | Environment-friendly utilization equipment for heat treatment of wastewater |
| CN114470839A (en) * | 2022-02-15 | 2022-05-13 | 全椒科利德电子材料有限公司 | High-purity propylene electron gas is heat exchange vary voltage rectification equipment with imitating by force |
| CN114470839B (en) * | 2022-02-15 | 2022-11-11 | 全椒科利德电子材料有限公司 | High-purity propylene electron gas preparation is with high-efficient heat exchange vary voltage rectification equipment |
| CN114470843A (en) * | 2022-03-03 | 2022-05-13 | 宿迁新亚科技有限公司 | Rectifying device and rectifying process for N-methylformamide |
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Application publication date: 20171215 |