CN112121750A - Rosin phenolic resin preparation facilities - Google Patents
Rosin phenolic resin preparation facilities Download PDFInfo
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- CN112121750A CN112121750A CN202011092432.1A CN202011092432A CN112121750A CN 112121750 A CN112121750 A CN 112121750A CN 202011092432 A CN202011092432 A CN 202011092432A CN 112121750 A CN112121750 A CN 112121750A
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- 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
- B01J19/18—Stationary reactors having moving elements inside
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- 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
- B01J19/0053—Details of the reactor
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- 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
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a rosin phenolic resin preparation device which comprises a box body assembly, supporting legs and a stirring assembly, wherein the supporting legs are arranged at four corners below the box body assembly; according to the invention, through the arrangement of the exhaust assembly, when the exhaust device is used, the exhaust fan is electrified to operate, a negative pressure environment is formed above the interior of the box body through the gas pipe and the gas collecting cover, waste gas generated by reaction is conveyed to the waste gas treatment system through the gas pipe, the waste gas is convenient to collect and centralize, the pollution of the waste gas to the atmosphere is prevented, the physical health of operators is facilitated, the gas-liquid separator is used for separating liquid in the waste gas, and the separated liquid flows back into the box body through the return pipe, so that the waste of raw material resources is avoided.
Description
Technical Field
The invention relates to the technical field of rosin phenolic resin, in particular to a rosin phenolic resin preparation device.
Background
The rosin phenolic resin is a resin with light color to yellow color, has high softening point, high viscosity and better oxidation resistance, is completely resistant to crystallization in a liquid state or in a solution, and has the applications of paint, drying agent, synthetic resin, automobile ink, floor tiles, rubber composition, soldering flux, soldering paste and the like, various adhesives and protective coating, but various rosin phenolic resin preparation devices on the market still have problems.
Chinese patent document CN 207951460U discloses a preparation device of alcohol-soluble acrylic rosin resin, which comprises a support frame, a reinforcing rib, a fixed plate and a manual valve, wherein the reinforcing rib is arranged on one side of the support frame, the fixed plate is arranged on one side of the support frame, a reaction kettle is arranged on the support frame, a discharge pipe is arranged on the reaction kettle, the manual valve is arranged on the discharge pipe, a stirring shaft is arranged in the reaction kettle, a bearing seat is arranged above the stirring blade, and a vacuum pumping box is arranged on one side of the reaction kettle; although realized making raw materials intensive mixing reaction, can carrying out real time monitoring to the temperature in the reation kettle, temperature control is more accurate, has improved product quality, but current rosin phenol-formaldehyde resin preparation facilities can not collect waste gas, is unfavorable for the centralized processing of waste gas, and waste gas causes the pollution to the atmosphere, and is unfavorable for operating personnel's healthy.
Disclosure of Invention
The invention provides a rosin phenolic resin preparation device, which aims to solve the problems that the existing rosin phenolic resin preparation device cannot collect waste gas, is not beneficial to centralized treatment of the waste gas, causes pollution to the atmosphere by the waste gas, and is not beneficial to the body health of operators.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a rosin phenolic resin preparation device which comprises a box body assembly, supporting legs and a stirring assembly, wherein the supporting legs are arranged at four corners below the box body assembly;
the exhaust subassembly includes the gas-supply pipe, the gas-supply pipe is installed in the box subassembly top and is close to one side of automatically controlled cabinet, a plurality of gas collecting channels are installed to the below that the gas-supply pipe deviates from automatically controlled cabinet one end, the gas collecting channel is located the inside of box subassembly, the air exhauster is installed to the gas-supply pipe, vapour and liquid separator is located the outside of air exhauster, the back flow is installed to vapour and liquid separator's lower extreme, the lower extreme of back flow communicates with each other with the inside of.
Preferably, the supporting legs are in a square column shape, the electric control cabinet is connected with a mains supply through a lead, the PLC is connected with the electric control cabinet through a lead, the PLC is FX1S-30MR-001, one end, close to the electric control cabinet, of the gas pipe is connected with the waste gas treatment system, and the lower end of the gas collecting hood is in a horn shape.
Preferably, the exhaust fan is respectively connected with the electric control cabinet and the PLC through leads, the exhaust fan is DPT10-20A type, the gas-liquid separator is communicated with the inside of the gas conveying pipe, the upper end of the return pipe is connected with a liquid collecting pipe in the gas-liquid separator, and the upper end of the return pipe inclines outwards.
Preferably, the box subassembly includes the box, the intermediate layer is installed to the lower extreme in the box outside, the inlet tube is installed to the below that the intermediate layer deviates from automatically controlled cabinet one side, the outlet pipe is installed to the top that the intermediate layer deviates from automatically controlled cabinet one side, the inlet pipe is installed to the one side that the box top deviates from automatically controlled cabinet, temperature sensor is installed to the inside top of box one side that deviates from automatically controlled cabinet, the discharging pipe is installed to the both sides of box below.
Preferably, a heat insulation layer is arranged on the outer side of the interlayer, the temperature sensor is connected with the electric control cabinet and the PLC respectively through wires, the temperature sensor is of a CWDZ11 type, the feeding pipe is provided with a screw cap, the discharging pipe is provided with a valve, the water inlet pipe and the water outlet pipe are both provided with valves, the tail end of the water inlet pipe is connected with a hot water source, and the tail end of the water outlet pipe is connected with a hot water recovery system.
Preferably, the stirring subassembly includes agitator motor and swing arm, agitator motor installs the intermediate position in the box top, agitator motor's output shaft runs through to the inside of box, the intermediate position in the inside below of box is installed through the axle sleeve to the lower extreme of swing arm, the upper end of swing arm is passed through the shaft coupling and is linked to each other with agitator motor's output shaft.
Preferably, a plurality of stirring boards are installed to the both sides of swing arm, the connecting rod is installed to the one end that deviates from the swing arm between the stirring board, a plurality of shearing holes have been seted up to the stirring board.
Preferably, agitator motor passes through the wire and links to each other with automatically controlled cabinet and PLC controller respectively, agitator motor chooses for use 130ST-M15015 type, the swing arm chooses for use cylindrically, the size of swing arm matches with agitator motor's output shaft's size.
Preferably, the stirring board adopts the cuboid, the equidistant setting of stirring board, the length of connecting rod equals the distance between the stirring board, it adopts cylindrically to cut the hole, the degree of depth of cutting the hole equals the thickness of stirring board.
The invention has the beneficial effects that:
1. according to the invention, through the arrangement of the exhaust assembly, when the exhaust device is used, the exhaust fan is electrified to operate, a negative pressure environment is formed above the interior of the box body through the gas pipe and the gas collecting cover, waste gas generated by reaction is conveyed to the waste gas treatment system through the gas pipe, the waste gas is convenient to collect and centralize, the pollution of the waste gas to the atmosphere is prevented, the physical health of operators is facilitated, the gas-liquid separator is used for separating liquid in the waste gas, and the separated liquid flows back into the box body through the return pipe, so that the waste of raw material resources is avoided.
2. According to the invention, through the arrangement of the stirring assembly, the stirring motor is electrified to operate to drive the rotary rod to rotate, the raw materials are stirred through the stirring plate, the raw materials are sheared by the shearing holes during stirring, so that the raw materials are uniformly mixed, the processing quality of the stirring assembly is improved, the stirring plates are connected together by the connecting rod, the stirring plates are integrated, the phenomenon of bending deformation of the stirring plates is avoided, and the service life of the stirring plates is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for producing rosin phenol resin according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a box assembly of the rosin phenol resin production apparatus according to the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a stirring assembly of the rosin phenol resin production apparatus according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an exhaust assembly of an apparatus for producing a rosin phenol resin according to an embodiment of the present invention.
In the figure:
1. a case assembly; 11. a box body; 12. an interlayer; 13. a temperature sensor; 14. a feed pipe; 15. a discharge pipe; 16. a water inlet pipe; 17. a water outlet pipe; 2. supporting legs; 3. a stirring assembly; 31. a stirring motor; 32. rotating the rod; 33. a stirring plate; 34. a connecting rod; 35. shearing holes; 4. an exhaust assembly; 41. a gas delivery pipe; 42. a gas-collecting hood; 43. an exhaust fan; 44. a gas-liquid separator; 45. a return pipe; 5. an electric control cabinet; 6. a PLC controller.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1-4, the embodiment provides a rosin phenolic resin preparation device, which comprises a box assembly 1, support legs 2 and a stirring assembly 3, wherein the support legs 2 are arranged at four corners below the box assembly 1, the stirring assembly 3 is arranged at a middle position above the box assembly 1, the lower end of the stirring assembly 3 is positioned inside the box assembly 1, an exhaust assembly 4 is arranged at one side above the box assembly 1, an electric control cabinet 5 is arranged below one side of the box assembly 1, which is close to the exhaust assembly 4, and a PLC controller 6 is arranged at a middle position of one side of the box assembly 1, which is close to the exhaust assembly 4;
the exhaust component 4 comprises an air pipe 41, the air pipe 41 is arranged on one side of the upper part of the box body component 1 close to the electric control cabinet 5, a plurality of air collecting hoods 42 are arranged on the lower part of one end of the air pipe 41 far away from the electric control cabinet 5, the air collecting hoods 42 are positioned in the box body component 1, an exhaust fan 43 is arranged on the air pipe 41, an air-liquid separator 44 is arranged on the air pipe 41, the air-liquid separator 44 is positioned on the outer side of the exhaust fan 43, a return pipe 45 is arranged at the lower end of the air-liquid separator 44, the lower end of the return pipe 45 is communicated with the, through gas-supply pipe 41 and gas collection cover 42 at the inside top formation negative pressure environment of box 11, carry the waste gas that the reaction produced to exhaust-gas treatment system through gas-supply pipe 41, be convenient for to the collection of waste gas and concentrated the processing, prevent that waste gas from causing the pollution to the atmosphere, be favorable to operating personnel's healthy.
In this embodiment, specifically, the support leg 2 adopts the square column shape, the electric control cabinet 5 is connected with the commercial power through a wire, the PLC controller 6 is connected with the electric control cabinet 5 through a wire, the PLC controller 6 selects FX1S-30MR-001 for use, one end of the gas pipe 41 close to the electric control cabinet 5 is connected with the waste gas treatment system, the lower end of the gas collecting hood 42 adopts the horn shape, the electric control cabinet 5 is connected with the commercial power to supply power for the system, and the power-on operation of the PLC controller 6 performs system control.
In this embodiment, it is concrete, the air exhauster 43 links to each other with automatically controlled cabinet 5 and PLC controller 6 respectively through the wire, the DPT10-20A type is selected for use to the air exhauster 43, vapour and liquid separator 44 communicates with each other with the inside of gas-supply pipe 41, the upper end of back flow pipe 45 links to each other with the inside collecting pipe of vapour and liquid separator 44, the upper end of back flow pipe 45 inclines to the outside, vapour and liquid separator 44 is to the liquid separation in the waste gas, the liquid of separation flows back to in the box 11 through back flow pipe 45, avoid the waste of raw materials resource.
In this embodiment, specifically, box subassembly 1 includes box 11, intermediate layer 12 is installed to the lower extreme in the box 11 outside, intermediate layer 12 deviates from the below of automatically controlled cabinet 5 one side and installs inlet tube 16, intermediate layer 12 deviates from the top of automatically controlled cabinet 5 one side and installs outlet pipe 17, box 11 top deviates from one side of automatically controlled cabinet 5 and installs inlet tube 14, box 11 is inside the top and deviates from one side of automatically controlled cabinet 5 and installs temperature sensor 13, discharging pipe 15 is installed to the both sides of box 11 below, intermediate layer 12's the outside is provided with the heat preservation, temperature sensor 13 links to each other with automatically controlled cabinet 5 and PLC controller 6 respectively through the wire, temperature sensor 13 chooses for use the CWD 11 type, inlet tube 14 is provided with the spiral cover, discharging pipe 15 is provided with the valve, inlet tube 16 and outlet pipe 17 all are provided with the valve, the end of inlet tube 16.
In this embodiment, it is specific, stirring subassembly 3 includes agitator motor 31 and swing arm 32, the intermediate position in box 11 top is installed to agitator motor 31, agitator motor 31's output shaft runs through to box 11 inside, the intermediate position in the inside below of box 11 is installed through the axle sleeve to the lower extreme of swing arm 32, the output shaft that shaft coupling and agitator motor 31 are passed through to the upper end of swing arm 32 links to each other, a plurality of stirring boards 33 are installed to the both sides of swing arm 32, connecting rod 34 is installed to the one end that deviates from swing arm 32 between the stirring board 33, stirring board 33 has seted up a plurality of holes 35 of cuting, agitator motor 31 circular telegram operation, it rotates to drive swing arm 32, stir the raw materials through stirring board 33, it shears the raw materials to cut hole 35 during the stirring, make the raw materials misce bene, improve stirring subassembly.
In this embodiment, it is concrete, agitator motor 31 links to each other with automatically controlled cabinet 5 and PLC controller 6 respectively through the wire, 130ST-M15015 type is chooseed for use to agitator motor 31, the swing arm 32 is chooseed for use cylindrically, the size of swing arm 32 matches with the size of agitator motor 31's output shaft, agitator plate 33 adopts the cuboid, agitator plate 33 equidistant setting, the length of connecting rod 34 equals the distance between agitator plate 33, it is cylindrical to cut hole 35, the degree of depth of cutting hole 35 equals the thickness of agitator plate 33, connecting rod 34 links together agitator plate 33, make agitator plate 33 become a whole, avoid agitator plate 33 to appear bending deformation's phenomenon, improve agitator plate 33's life.
In the invention, when in use, the electric control cabinet 5 is connected with commercial power to supply power to a system, the PLC 6 is electrified to operate to carry out system control, raw materials enter the box body 11 from the inlet pipe 14, hot water enters the interlayer 12 from the inlet pipe 16, the circulation of the hot water in the interlayer 12 is realized through the outlet pipe 17, the stirring motor 31 is electrified to operate to drive the rotary rod 32 to rotate, the raw materials are stirred through the stirring plate 33, the raw materials are sheared through the shearing holes 35 during stirring, so that the raw materials are uniformly mixed, the processing quality of the stirring component 3 is improved, the stirring plate 33 is connected together through the connecting rod 34, the stirring plate 33 is integrated, the phenomenon of bending deformation of the stirring plate 33 is avoided, the service life of the stirring plate 33 is prolonged, meanwhile, the exhaust fan 43 is electrified to operate, a negative pressure environment is formed above the box body 11 through the air conveying pipe 41 and the air collecting hood 42, and the waste gas, be convenient for to the collection of waste gas and concentrated processing, prevent that waste gas from causing the pollution to the atmosphere, be favorable to operating personnel's healthy, vapour and liquid separator 44 is to the liquid separation in the waste gas, and the liquid of separation passes through back flow 45 and flows back to in the box 11, avoids the waste of raw materials resource.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (9)
1. The utility model provides a rosin phenolic resin preparation facilities, includes box subassembly (1), supporting leg (2) and stirring subassembly (3), its characterized in that: the support legs (2) are arranged at four corners below the box body assembly (1), the stirring assembly (3) is arranged at the middle position above the box body assembly (1), the lower end of the stirring assembly (3) is located inside the box body assembly (1), the exhaust assembly (4) is arranged on one side above the box body assembly (1), the electric control cabinet (5) is arranged below one side, close to the exhaust assembly (4), of the box body assembly (1), and the PLC controller (6) is arranged at the middle position, close to one side of the exhaust assembly (4), of the box body assembly (1);
exhaust subassembly (4) include gas-supply pipe (41), one side that is close to automatically controlled cabinet (5) is installed in box subassembly (1) top in gas-supply pipe (41), gas-supply pipe (41) deviate from the below of automatically controlled cabinet (5) one end and install a plurality of gas collecting channel (42), gas collecting channel (42) are located the inside of box subassembly (1), air exhauster (43) are installed in gas-supply pipe (41), vapour and liquid separator (44) are located the outside of air exhauster (43), back flow (45) are installed to the lower extreme of vapour and liquid separator (44), the lower extreme of back flow (45) communicates with each other with the inside of box subassembly (1).
2. The rosin phenol resin production apparatus according to claim 1, characterized in that: the supporting legs (2) adopt a square column shape, the electric control cabinet (5) is connected with a mains supply through a wire, the PLC (6) is connected with the electric control cabinet (5) through a wire, one end, close to the electric control cabinet (5), of the gas conveying pipe (41) is connected with a waste gas treatment system, and the lower end of the gas collecting hood (42) is in a horn shape.
3. The rosin phenol resin production apparatus according to claim 1, characterized in that: the exhaust fan (43) is respectively connected with the electric control cabinet (5) and the PLC (6) through wires, the gas-liquid separator (44) is communicated with the inside of the gas conveying pipe (41), the upper end of the return pipe (45) is connected with a liquid collecting pipe inside the gas-liquid separator (44), and the upper end of the return pipe (45) inclines outwards.
4. The rosin phenol resin production apparatus according to claim 1, characterized in that: box subassembly (1) includes box (11), intermediate layer (12) are installed to the lower extreme in the box (11) outside, inlet tube (16) are installed to the below that intermediate layer (12) deviate from automatically controlled cabinet (5) one side, outlet pipe (17) are installed to the top that intermediate layer (12) deviate from automatically controlled cabinet (5) one side, inlet pipe (14) are installed to one side that deviates from automatically controlled cabinet (5) in box (11) top, temperature sensor (13) are installed to one side that deviates from automatically controlled cabinet (5) in box (11) inside top, discharging pipe (15) are installed to both sides of box (11) below.
5. The rosin phenol resin production apparatus according to claim 4, characterized in that: the outer side of the interlayer (12) is provided with a heat preservation layer, the temperature sensor (13) is respectively connected with the electric control cabinet (5) and the PLC (6) through wires, the feeding pipe (14) is provided with a screw cap, the discharging pipe (15) is provided with a valve, the water inlet pipe (16) and the water outlet pipe (17) are both provided with valves, the tail end of the water inlet pipe (16) is connected with a hot water source, and the tail end of the water outlet pipe (17) is connected with a hot water recovery system.
6. The rosin phenol resin production apparatus according to claim 1, characterized in that: stirring subassembly (3) are including agitator motor (31) and swing arm (32), the intermediate position in box (11) top is installed in agitator motor (31), the output shaft of agitator motor (31) runs through to the inside of box (11), the intermediate position in the inside below of box (11) is installed through the axle sleeve to the lower extreme of swing arm (32), the output shaft that the upper end of swing arm (32) passes through shaft coupling and agitator motor (31) links to each other.
7. The rosin phenol resin production apparatus according to claim 6, characterized in that: a plurality of stirring boards (33) are installed to the both sides of swing arm (32), connecting rod (34) are installed to the one end that deviates from swing arm (32) between stirring board (33), a plurality of shearing holes (35) have been seted up in stirring board (33).
8. The rosin phenol resin production apparatus according to claim 6, characterized in that: the stirring motor (31) is respectively connected with the electric control cabinet (5) and the PLC (6) through wires, the rotary rod (32) is cylindrical, and the size of the rotary rod (32) is matched with the size of an output shaft of the stirring motor (31).
9. The rosin phenol resin production apparatus according to claim 7, characterized in that: stirring board (33) adopt the cuboid, stirring board (33) equidistant setting, the length of connecting rod (34) equals the distance between stirring board (33), it is cylindrical to cut hole (35) adoption, the degree of depth of cutting hole (35) equals the thickness of stirring board (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011092432.1A CN112121750A (en) | 2020-10-13 | 2020-10-13 | Rosin phenolic resin preparation facilities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011092432.1A CN112121750A (en) | 2020-10-13 | 2020-10-13 | Rosin phenolic resin preparation facilities |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112121750A true CN112121750A (en) | 2020-12-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011092432.1A Withdrawn CN112121750A (en) | 2020-10-13 | 2020-10-13 | Rosin phenolic resin preparation facilities |
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| Country | Link |
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| CN (1) | CN112121750A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207446020U (en) * | 2017-11-07 | 2018-06-05 | 河南道骐汽车科技有限公司 | A kind of OIL IN LUBRICATING OIL PRODUCTION Mixer pot |
| CN209423560U (en) * | 2018-12-04 | 2019-09-24 | 广州勇乐物医药科技有限公司 | A kind of drug production drug intermediate reaction kettle |
| CN110357686A (en) * | 2019-07-29 | 2019-10-22 | 石家庄富铭生物有机肥有限公司 | A kind of process equipment of biological organic fertilizer |
| CN110938538A (en) * | 2019-11-23 | 2020-03-31 | 湖南明镜生物科技有限公司 | Biological feed heat preservation fermenting installation |
| CN210252243U (en) * | 2019-05-16 | 2020-04-07 | 天津阿托兹新材料科技有限公司 | Polyamide resin production is with reation kettle who has anti-sticking wall function |
| CN211133946U (en) * | 2019-11-25 | 2020-07-31 | 石家庄龙泽制药股份有限公司 | Temperature and pressure automatic control device for lamivudine chlorination reaction |
-
2020
- 2020-10-13 CN CN202011092432.1A patent/CN112121750A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207446020U (en) * | 2017-11-07 | 2018-06-05 | 河南道骐汽车科技有限公司 | A kind of OIL IN LUBRICATING OIL PRODUCTION Mixer pot |
| CN209423560U (en) * | 2018-12-04 | 2019-09-24 | 广州勇乐物医药科技有限公司 | A kind of drug production drug intermediate reaction kettle |
| CN210252243U (en) * | 2019-05-16 | 2020-04-07 | 天津阿托兹新材料科技有限公司 | Polyamide resin production is with reation kettle who has anti-sticking wall function |
| CN110357686A (en) * | 2019-07-29 | 2019-10-22 | 石家庄富铭生物有机肥有限公司 | A kind of process equipment of biological organic fertilizer |
| CN110938538A (en) * | 2019-11-23 | 2020-03-31 | 湖南明镜生物科技有限公司 | Biological feed heat preservation fermenting installation |
| CN211133946U (en) * | 2019-11-25 | 2020-07-31 | 石家庄龙泽制药股份有限公司 | Temperature and pressure automatic control device for lamivudine chlorination reaction |
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Application publication date: 20201225 |