CN112973159A - Environment-friendly circulation ejection of compact distillation column - Google Patents
Environment-friendly circulation ejection of compact distillation column Download PDFInfo
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- CN112973159A CN112973159A CN201911270528.XA CN201911270528A CN112973159A CN 112973159 A CN112973159 A CN 112973159A CN 201911270528 A CN201911270528 A CN 201911270528A CN 112973159 A CN112973159 A CN 112973159A
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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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to the technical field of industrial standard devices, in particular to an environment-friendly circulating discharge distillation tower which comprises a tower kettle, wherein a distillation tower main body is fixed at the top end of the tower kettle, a feed inlet is welded at one side of the distillation tower main body, a reboiler is fixedly inserted at one side of the tower kettle through a guide pipe, a steam inlet is formed in one end of the reboiler, the diameter of the steam inlet is five centimeters, mixed steam is conveniently introduced into the reboiler, a multi-mode rapid condensation structure is fixed at the top end of the tower kettle, and the lower end of the multi-mode rapid condensation structure is connected with a cooler through a guide pipe. According to the invention, the multi-mode rapid condensation structure is arranged in the device, so that the device can rapidly cool multiple distillation discharge materials containing more volatile substances, thereby accelerating the efficiency of circulating discharge, and the waste water recycling and storing structure is added at the waste liquid discharge port of the reboiler, so that the influence on the environment is reduced in the use process of the device.
Description
Technical Field
The invention relates to the technical field of industrial standard devices, in particular to an environment-friendly circulating discharging distillation tower.
Background
The distillation tower is a chemical device made of rare metal titanium and other materials and alloy materials thereof, and has the characteristics of high strength, high toughness, high temperature resistance, corrosion resistance, light specific gravity and the like; consequently by wide application and chemical industry, petrochemical, metallurgy, light industry, weaving, system alkali, pharmacy, pesticide, electroplating, fields such as electron, the function of distillation column has mainly been for separating the mixed liquid, utilize different liquid under different conditions, if the temperature is different, the liquid separation is carried out to the principle that volatility (boiling point) are different, thereby reach the purification effect, however, current device is when the cooling reflux after carrying out the separation is collected, the cooling method of condenser is single, lead to the condensation liquefaction efficiency slower, reduce the efficiency of circulation ejection of compact, and the waste water that produces in the use is not purified, there is great influence to the environment.
Disclosure of Invention
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an environment-friendly circulation ejection of compact distillation column, includes the tower cauldron, the top of tower cauldron is fixed with the distillation column main part, the welding of one side of distillation column main part has the feed inlet, one side of tower cauldron is fixed with reboiler through the pipe grafting, tower cauldron top is fixed with multimode rapid condensation structure, there is the cooler lower extreme of multimode rapid condensation structure through pipe connection, one side of cooler lower extreme is fixed with the finished product jar, the opposite side welding of cooler lower extreme has semi-finished product pipe, there is waste water recovery storage structure one end of reboiler through pipe connection.
Preferably, the multi-mode rapid condensation structure comprises a sheet-shaped heat conduction plate, an air cooling fixing frame, an air cooling fan blade, an assembly fixing sleeve, a dispersed rapid liquefaction pipe, a micro booster pump, a steam circulation conduit, a soaking type water cooling tank and a concentrated liquefaction delivery pipe, the two sides of the sheet-shaped heat conducting plate are both fixed with an air-cooling fixing frame through screws, the air-cooling fan blades are fixed inside the air-cooling fixing frame, the outer sides of the sheet heat conducting plate and the air-cooled fixing frame are respectively sleeved with an assembly fixing sleeve, a dispersion rapid liquefaction pipe is fixed in the sheet heat conducting plate, the bottom end of one end of the dispersing fast liquefaction pipe is connected with a micro booster pump through a separation water pipe, one end of the micro booster pump is inserted with a steam circulation conduit, and an immersion type water cooling tank is fixed on the outer side of the steam circulation conduit, and a concentrated liquefaction delivery pipe is fixed at the bottom end of the other end of the dispersed rapid liquefaction pipe.
Preferably, wastewater reclamation storage structure includes first water pump, filtration purification structure, second water pump and recovery storage box, one side of first water pump is connected with filtration purification structure through the honeycomb duct, one side of filtration purification structure is connected with the second water pump through the honeycomb duct, the one end of second water pump is connected with the recovery storage box through the honeycomb duct.
Preferably, the filtering and purifying structure comprises a filtering water tank, a sterilizing filter plate, an organic matter removing filter plate and a particle removing filter plate, wherein the sterilizing filter plate, the organic matter removing filter plate and the particle removing filter plate are sequentially inserted into the filtering water tank from one end to the other end.
Preferably, the material of the sterilization filter plate is high-purity nano silver, the material of the organic matter removal filter plate is honeycomb activated carbon, and the material of the particle removal filter plate is PP fiber.
Preferably, one end of the recovery storage box is provided with a waste water outlet, and the diameter of the waste water outlet is twenty centimeters.
Preferably, an output motor is fixed at one end of the air-cooled fan blade, and the output motor is fixedly connected with the air-cooled fan blade through a flat key.
Preferably, the material of dispersion flash liquefaction pipe is copper, the standing groove has been seted up to the inside of slice heat-conducting plate, the top of dispersion flash liquefaction pipe is laminated completely with the upper surface of standing groove.
Preferably, one end of the reboiler is provided with a steam inlet, and the diameter of the steam inlet is five centimeters.
Compared with the prior art, the invention has the beneficial effects that:
1. the volatile gas generated in the invention is extracted and driven by the micro-booster pump through the steam circulation conduit, so that the volatile gas moves along the transmission direction of the micro-booster pump, passes through the inside of the soaking type water cooling tank, because the cooling liquid is stored in the soaking type water cooling tank, part of heat in the volatile gas is taken away through the heat transfer characteristic to form primary liquefaction, the primary liquefied gas is transferred to the dispersing fast liquefaction pipe through the micro-booster pump, and enters a smaller space through shunting, so that the compression and cooling are convenient, the residual heat is led out through the material conduction of the dispersing fast liquefaction pipe and the adsorption of the flaky heat conducting plate, the residual heat is simultaneously air-cooled through the air-cooled fan blades on the two sides of the flaky heat conducting plate, the self heat of the flaky heat conducting plate is reduced, the rapid conduction and suction of the heat in the dispersing fast liquefaction pipe can be ensured, and the, the concentrated liquefaction delivery pipes are gathered and flow out, so that the device can quickly cool multiple distillation discharge materials containing more volatile substances, and the efficiency of circular discharge is improved;
2. according to the invention, a large amount of polluted wastewater generated by the reboiler during operation is connected to the first water pump through the guide pipe, the wastewater in the guide pipe is guided into the filtering and purifying structure through the power of the first water pump, the wastewater is subjected to multi-layer division filtering of the particle removing filter plate, the organic matter removing filter plate and the sterilizing filter plate in the filtering and purifying structure, the particle removing filter plate isolates particles doped in the wastewater by using the characteristics of the material of the particle removing filter plate, the organic matter removing filter plate adsorbs the organic matters in the wastewater by using the characteristics of the material of the particle removing filter plate, and finally, the wastewater is sterilized and disinfected again by using the sterilizing characteristics of the material of the sterilizing filter plate, so that the harm of the wastewater is reduced, and finally, the wastewater is drawn to the recovery storage tank for storage through the second water pump, so.
Drawings
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a side view of the present invention in its entirety;
FIG. 3 is a side view of a multimode rapid condensation structure of the present invention;
FIG. 4 is an exploded view of a multimode rapid condensation structure of the present invention;
FIG. 5 is a schematic view showing a partial structure of a wastewater reclamation and storage structure according to the present invention;
fig. 6 is a cross-sectional view of a filtration purification structure of the present invention.
In the figure: 1. a tower kettle; 2. a distillation column main body; 3. a feed inlet; 4. a reboiler; 5. a sheet-like heat-conducting plate; 6. an air-cooled fixing frame; 7. air-cooling the fan blades; 8. assembling a fixed sleeve; 9. a dispersed fast liquefaction tube; 10. a micro booster pump; 11. a steam circulation conduit; 12. a soaking type water cooling tank; 13. a centralized liquefaction delivery pipe; 14. a multi-mode rapid condensation structure; 15. a cooler; 16. a finished product tank; 17. a semi-finished pipe; 18. a first water pump; 19. a filtering and purifying structure; 20. a second water pump; 21. a recovery storage tank; 22. a wastewater recovery and storage structure; 23. a filtering water tank; 24. sterilizing the filter plate; 25. removing the filter plate by organic matters; 26. the filter plate is removed from the particles.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, an environment-friendly circulating discharging distillation tower comprises a tower kettle 1, a distillation tower main body 2 is fixed at the top end of the tower kettle 1, a feeding hole 3 is welded at one side of the distillation tower main body 2, a reboiler 4 is fixed at one side of the tower kettle 1 through a guide pipe in an inserting manner, a steam inlet is formed in one end of the reboiler 4, the diameter of the steam inlet is five centimeters, mixed steam is conveniently led into the reboiler 4, a multi-mode rapid condensation structure 14 is fixed at the top end of the tower kettle 1, the lower end of the multi-mode rapid condensation structure 14 is connected with a cooler 15 through a guide pipe, a finished product tank 16 is fixed at one side of the lower end of the cooler 15, a semi-finished product pipe 17 is welded at the other side of the lower end of the cooler 15, and a wastewater recovery and storage structure 22;
the multi-mode rapid condensation structure 14 comprises a sheet-shaped heat conduction plate 5, an air-cooled fixing frame 6, an air-cooled fan blade 7, an assembly fixing sleeve 8, a dispersed rapid liquefaction pipe 9, a micro booster pump 10, a steam circulation conduit 11, an immersion type water-cooled tank 12 and a centralized liquefaction delivery pipe 13, wherein the air-cooled fixing frame 6 is fixed on two sides of the sheet-shaped heat conduction plate 5 through screws, the air-cooled fan blade 7 is fixed inside the air-cooled fixing frame 6, an output motor is fixed on one end of the air-cooled fan blade 7, the output motor is fixedly connected with the air-cooled fan blade 7 through a flat key so as to drive the air-cooled fan blade 7 to rotate, thereby generating air cooling, the assembly fixing sleeves 8 are sleeved on the outer sides of the sheet-shaped heat conduction plate 5 and the air-cooled fixing frame 6, the dispersed rapid liquefaction pipe 9 is fixed inside the sheet-shaped heat conduction plate 5, the dispersed rapid liquefaction pipe 9 is made of copper, the device is convenient for quickly guiding out heat in the dispersed fast liquefaction pipe 9, the bottom end of one end of the dispersed fast liquefaction pipe 9 is connected with a micro booster pump 10 through a separation water pipe, one end of the micro booster pump 10 is inserted with a steam circulation conduit 11, the outer side of the steam circulation conduit 11 is fixed with an immersion type water cooling tank 12, and the bottom end of the other end of the dispersed fast liquefaction pipe 9 is fixed with a concentrated liquefaction guide-out pipe 13, so that the discharged steam containing more volatile substances and distilled in a circulating mode can be quickly cooled;
the waste water recycling and storing structure 22 comprises a first water pump 18, a filtering and purifying structure 19, a second water pump 20 and a recycling storage tank 21, one side of the first water pump 18 is connected with the filtering and purifying structure 19 through a flow guide pipe, the filtering and purifying structure 19 comprises a filtering water tank 23, a sterilizing filtering plate 24, an organic matter removing filtering plate 25 and a particle removing filtering plate 26, the sterilizing filtering plate 24, the organic matter removing filtering plate 25 and the particle removing filtering plate 26 are sequentially inserted into the filtering water tank 23 from one end to the other end, the sterilizing filtering plate 24 is made of high-purity nano silver, the organic matter removing filtering plate 25 is made of honeycomb activated carbon, the particle removing filtering plate 26 is made of PP fibers so as to filter waste water with different effects, one side of the filtering and purifying structure 19 is connected with the second water pump 20 through a flow guide pipe, one end of the second water pump 20 is connected with the recycling storage tank 21 through, the diameter of the waste water guide outlet is twenty centimeters, so that the waste water stored in the waste water guide outlet after being filtered is discharged, and the waste water generated by the reboiler 4 is conveniently filtered and recycled.
The working principle is as follows: after mixed steam passes through the reboiler 4 to the inside of the distillation tower main body 2, through mutual collision of hot steam and cooling liquid, the volatile gas of the discharge steam containing more volatile substances and the non-volatile gas of the gas containing more high boiling point components are generated, the volatile gas is transmitted to the multi-mode rapid condensation structure 14 through the top end of the distillation tower main body 2, the gas is extracted and driven by the micro booster pump 10 through the steam circulation conduit 11, so that the volatile gas moves along the transmission direction of the micro booster pump 10, and passes through the inside of the soaking type water cooling tank 12, because the cooling liquid is stored in the soaking type water cooling tank 12, part of heat in the volatile gas is taken away through the heat transmission characteristic to form primary liquefaction, the liquefied gas is primarily transmitted to the dispersing rapid liquefaction pipe 9 through the micro booster pump 10 and enters into a smaller space through shunting, the device is convenient for compression and cooling, residual heat is led out through material conduction of the dispersed fast liquefaction pipe 9 and adsorption of the flaky heat conduction plate 5, air cooling is performed simultaneously through the air cooling fan blades 7 on two sides of the flaky heat conduction plate 5, the self heat of the flaky heat conduction plate 5 is reduced, and the fast conduction and suction of the heat in the dispersed fast liquefaction pipe 9 can be guaranteed, so that preliminary liquefied gas can be removed heat to form discharge liquid, the discharge liquid flows out through the collection of the concentrated liquefaction discharge pipe 13, the device can fast cool multiple distillation discharge materials containing more volatile substances, and the efficiency of circular discharge is improved; a large amount of polluted wastewater generated by the reboiler 4 during operation is connected to the first water pump 18 through a conduit, the wastewater in the conduit is guided into the filtering and purifying structure 19 through the power of the first water pump 18, the wastewater passes through the particle removing filter plate 26 in the filtering and purifying structure 19, the organic matter removing filter plate 25 and the multi-layer division filtering of the sterilizing filter plate 24, the particle removing filter plate 26 isolates particles doped in the wastewater by using the characteristics of the materials of the particle removing filter plate 26, the organic matter removing filter plate 25 adsorbs the organic matters in the wastewater by using the characteristics of the materials of the particle removing filter plate 25, and finally, the wastewater is sterilized and disinfected again by using the sterilizing characteristics of the materials of the sterilizing filter plate 24, so that the harm of the wastewater is reduced, and finally, the wastewater is drawn to the recovery storage tank 21 through the second water pump 20 to be stored, so that.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides an environment-friendly circulation ejection of compact distillation column, includes column bottom (1), its characterized in that: the top of tower cauldron (1) is fixed with distillation column main part (2), one side welding of distillation column main part (2) has feed inlet (3), one side of tower cauldron (1) is fixed with reboiler (4) through the pipe grafting, tower cauldron (1) top is fixed with multimode rapid condensation structure (14), there are cooler (15) lower extreme of multimode rapid condensation structure (14) through pipe connection, one side of cooler (15) lower extreme is fixed with finished product jar (16), the opposite side welding of cooler (15) lower extreme has semi-finished product pipe (17), there is waste water recovery storage structure (22) one end of reboiler (4) through pipe connection.
2. The environment-friendly circulating discharging distillation tower as claimed in claim 1, wherein: the multi-mode rapid condensation structure (14) comprises a sheet-shaped heat conduction plate (5), an air cooling fixing frame (6), air cooling fan blades (7), an assembly fixing sleeve (8), a dispersing rapid liquefaction pipe (9), a micro booster pump (10), a steam circulation pipe (11), an immersion type water cooling tank (12) and a concentration liquefaction delivery pipe (13), wherein the air cooling fixing frame (6) is fixed on two sides of the sheet-shaped heat conduction plate (5) through screws, the air cooling fan blades (7) are fixed inside the air cooling fixing frame (6), the assembly fixing sleeve (8) is sleeved on the outer sides of the sheet-shaped heat conduction plate (5) and the air cooling fixing frame (6), the dispersing rapid liquefaction pipe (9) is fixed inside the sheet-shaped heat conduction plate (5), the bottom end of one end of the dispersing rapid liquefaction pipe (9) is connected with the micro booster pump (10) through a separation water pipe, the steam circulation pipe (11) is inserted into one end of the, and a soaking type water cooling tank (12) is fixed on the outer side of the steam circulation conduit (11), and a concentrated liquefaction eduction tube (13) is fixed at the bottom end of the other end of the dispersed rapid liquefaction tube (9).
3. The environment-friendly circulating discharging distillation tower as claimed in claim 1, wherein: the waste water recycling and storing structure (22) comprises a first water pump (18), a filtering and purifying structure (19), a second water pump (20) and a recycling and storing box (21), one side of the first water pump (18) is connected with the filtering and purifying structure (19) through a flow guiding pipe, one side of the filtering and purifying structure (19) is connected with the second water pump (20) through a flow guiding pipe, and one end of the second water pump (20) is connected with the recycling and storing box (21) through a flow guiding pipe.
4. The environment-friendly circulating discharging distillation tower as claimed in claim 3, wherein: the filtering and purifying structure (19) comprises a filtering water tank (23), a sterilizing filter plate (24), an organic matter removing filter plate (25) and a particle removing filter plate (26), wherein the sterilizing filter plate (24), the organic matter removing filter plate (25) and the particle removing filter plate (26) are sequentially inserted into the filtering water tank (23) from one end to the other end.
5. The environment-friendly circulating discharging distillation tower as claimed in claim 4, wherein: the material of filter plate (24) disinfects is high-purity nanometer silver, the material that filter plate (25) was got rid of to the organic matter is honeycomb activated carbon, the material that filter plate (26) was got rid of to the granule is the PP fibre.
6. The environment-friendly circulating discharging distillation tower as claimed in claim 3, wherein: and a waste water guide outlet is formed in one end of the recovery storage box (21), and the diameter of the waste water guide outlet is twenty centimeters.
7. The environment-friendly circulating discharging distillation tower as claimed in claim 2, wherein: an output motor is fixed at one end of the air cooling fan blade (7), and the output motor is fixedly connected with the air cooling fan blade (7) through a flat key.
8. The environment-friendly circulating discharging distillation tower as claimed in claim 2, wherein: the material of dispersion flash liquefaction pipe (9) is copper, the standing groove has been seted up to the inside of slice heat-conducting plate (5), the top of dispersion flash liquefaction pipe (9) and the upper surface of standing groove laminate completely.
9. The environment-friendly circulating discharging distillation tower as claimed in claim 1, wherein: and a steam inlet is formed in one end of the reboiler (4), and the diameter of the steam inlet is five centimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911270528.XA CN112973159A (en) | 2019-12-12 | 2019-12-12 | Environment-friendly circulation ejection of compact distillation column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911270528.XA CN112973159A (en) | 2019-12-12 | 2019-12-12 | Environment-friendly circulation ejection of compact distillation column |
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| CN112973159A true CN112973159A (en) | 2021-06-18 |
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| CN101481301A (en) * | 2008-01-11 | 2009-07-15 | 山东科技大学 | Production process for preparing dimethyl ether by methanol reaction fractional distillation stepwise reaction |
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| CN207429729U (en) * | 2017-09-26 | 2018-06-01 | 江苏康博新材料科技有限公司 | A kind of rectifier column reflux tank safety control |
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| CN208574415U (en) * | 2018-06-20 | 2019-03-05 | 桐乡市乌镇内利仿古园林建设有限公司 | A kind of ready-mixed concrete three-protection design system |
| CN109775676A (en) * | 2019-03-08 | 2019-05-21 | 南通江山农药化工股份有限公司 | The purification apparatus and its technique of phosphorus trichloride |
| CN211635256U (en) * | 2019-12-12 | 2020-10-09 | 倪治荣 | Environment-friendly circulation ejection of compact distillation column |
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2019
- 2019-12-12 CN CN201911270528.XA patent/CN112973159A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB608038A (en) * | 1945-05-17 | 1948-09-09 | Aluminium Plant & Vessel Co | Improvements in or relating to distillation processes |
| CN101481301A (en) * | 2008-01-11 | 2009-07-15 | 山东科技大学 | Production process for preparing dimethyl ether by methanol reaction fractional distillation stepwise reaction |
| CN101610662A (en) * | 2008-06-20 | 2009-12-23 | 沈国忠 | Heat pipe cooling type fully sealed high-efficiency radiating electronic cabinet |
| CN201363969Y (en) * | 2008-11-17 | 2009-12-16 | 北京盈金时代科技有限公司 | High-efficiency air-cooled and water-cooled condenser |
| CN207429729U (en) * | 2017-09-26 | 2018-06-01 | 江苏康博新材料科技有限公司 | A kind of rectifier column reflux tank safety control |
| CN108240018A (en) * | 2018-01-31 | 2018-07-03 | 荆门怡盛源环保科技有限公司 | A kind of domestic waste water purified treatment multi-purpose device |
| CN208574415U (en) * | 2018-06-20 | 2019-03-05 | 桐乡市乌镇内利仿古园林建设有限公司 | A kind of ready-mixed concrete three-protection design system |
| CN109775676A (en) * | 2019-03-08 | 2019-05-21 | 南通江山农药化工股份有限公司 | The purification apparatus and its technique of phosphorus trichloride |
| CN211635256U (en) * | 2019-12-12 | 2020-10-09 | 倪治荣 | Environment-friendly circulation ejection of compact distillation column |
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