CN115990390A - Active carbon adsorption tower for treating waste gas generated in propane production and operation process thereof - Google Patents
Active carbon adsorption tower for treating waste gas generated in propane production and operation process thereof Download PDFInfo
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- CN115990390A CN115990390A CN202210377665.9A CN202210377665A CN115990390A CN 115990390 A CN115990390 A CN 115990390A CN 202210377665 A CN202210377665 A CN 202210377665A CN 115990390 A CN115990390 A CN 115990390A
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Abstract
The invention relates to the technical field of activated carbon adsorption towers, and discloses an activated carbon adsorption tower for treating waste gas in propane production, wherein an activated carbon adsorption layer is arranged in an inner cavity of a rectangular mounting frame, a stepping motor is fixed on the inner wall of the right side of the rectangular mounting frame, and a scraping plate is fixed on the lower surface of a moving block; the inner wall of the sealing layer is fixed with a second motor, the left end of the connecting rod penetrates through the side wall of the mounting cavity and is fixed with a vibration head, an ash storage drawer is inserted into the inner cavity of the ash storage groove, the added stepping motor is used as a power end, and finally the scraper is driven to scrape the surface of the activated carbon adsorption layer, so that dust accumulated on the surface of the activated carbon adsorption component is cleaned, and the adsorption efficiency of the device is improved; the second motor is additionally arranged as a power end, and finally the vibration head is driven to strike the surface of the square-shaped mounting frame, so that the square-shaped mounting frame vibrates, and dust in the holes of the activated carbon adsorption layer is vibrated and falls into the dust storage drawer.
Description
Technical Field
The invention relates to the technical field of activated carbon adsorption towers, in particular to an activated carbon adsorption tower for treating waste gas generated in propane production and an operation process thereof.
Background
The active carbon adsorption tower is the purifying equipment with the best effect of treating organic waste gas and odor. Activated carbon adsorption is a measure for effectively removing odor, natural and synthetic dissolved organic matters, micro-pollutants and the like of water.
The active carbon adsorption tower adsorbs dust and harmful substances in waste gas through loose porous active carbon particles, but because the active carbon is generally exposed and installed in a waste gas transmission pipeline, and is contacted with waste gas for a long time and adsorbed and filtered, a large amount of impurity particles can be filled in adsorption holes in the active carbon structure, so that an adsorption channel is blocked, the adsorption efficiency of the device is reduced, the common treatment method is to carry out integral replacement on an adsorption component, or take out the active carbon component and clean the active carbon component, which is time-consuming and labor-consuming, delays adsorption work, and causes low efficiency of waste gas treatment work.
Summary of the invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides an active carbon adsorption tower for treating the waste gas of propane production and an operation process thereof, so as to solve the problems in the background art.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an active carbon adsorption tower for propane production exhaust treatment, includes the adsorption tower body, former flue gas admission pipe is installed to the right side lower part of adsorption tower body, former flue gas admission pipe's inner chamber is fixed with the installing support, the fixed surface of installing support has first motor, the rotor of first motor is coaxial to be fixed with the flabellum, the inner wall of former flue gas admission pipe is fixed with the shape mounting bracket that returns, the inner chamber of shape mounting bracket is installed the active carbon adsorbed layer, the right side inner wall of shape mounting bracket that returns is fixed with step motor, the rotor coaxial fixed with the lead screw of step motor, the left end of lead screw is installed on the inner wall of shape mounting bracket that returns through the bearing, the periphery meshing of lead screw has the movable block, the lower surface mounting of movable block has the scraper blade, and the surface in close contact of scraper blade and active carbon adsorbed layer, it has the sealing layer to fill between the inner wall of shape mounting bracket and former flue gas admission pipe.
Preferably, the inner wall of sealing layer is fixed with the second motor, the rotor of second motor is fixed with the cam coaxially, the installation cavity has been seted up to the inner chamber of sealing layer, spacing cavity has been seted up to the inner chamber of installation cavity, the inner chamber of spacing cavity is fixed with first spring, the inner chamber of first spring is equipped with the connecting rod, the left end of connecting rod runs through the lateral wall of installation cavity and is fixed with the vibrations head, the right-hand member of first spring is fixed with the movable plate, and the movable plate embedding is in the inner chamber of spacing cavity, the inner wall of sealing layer is fixed with the second spring, the surface of second spring links to each other with the surface of return-type mounting bracket, the ash storage groove has been seted up to the lower surface of former flue gas admission pipe, the ash storage groove communicates with each other with the inner chamber of sealing layer, the inner chamber in ash storage groove is inserted and is equipped with the ash storage drawer.
Preferably, the lower end of the scraping plate is fixedly provided with a sliding block, a sliding groove is formed in the position, corresponding to the sliding block, of the mounting bracket, and the sliding block is matched with the sliding groove in position and size.
Preferably, the upper portion of adsorption tower body is the defroster region, and the top in defroster region is the flue gas export.
Preferably, the left side lower part of adsorption tower body is fixed with the mount pad, the upper surface of mount pad is installed the shower.
Preferably, the mounting seat is communicated with the spray pipe, the spray branch pipe is arranged at the right part of the spray pipe, and the spray branch pipe is positioned in the inner cavity of the adsorption tower body.
An operation process of an active carbon adsorption tower for treating waste gas in propane production comprises the following steps:
s1, entering waste gas;
the fan provides power to pump the waste gas into the adsorption tower body;
s2, adsorbing by activated carbon;
the activated carbon has developed gaps, large surface area and very high adsorption property, and is used for adsorbing harmful substances and dust in waste gas;
s3, spraying reaction;
spraying the water mist into the adsorption tower body through the spray pipe, and neutralizing with dust-containing gas to react with harmful substances contained in the waste gas;
s4, exhaust gas is discharged;
the waste gas enters the dust exhaust system of the equipment after passing through the filter, and the waste gas is discharged at high altitude after being checked.
Preferably, in step S2, activated carbon is adsorbed and installed at the air outlet of the fan, and the exhaust gas entering the device is filtered.
Preferably, in step S3, the spray tower water pump is turned on for 2-3 minutes each time the spray tower water pump is used, the blower is started, and the blower is stopped for 1-2 minutes after the machine is stopped.
Preferably, in the step S4, the dust passing through the waste gas monitoring instrument is less than or equal to 120mg/m < 3 >, and the dust can be discharged into the atmosphere.
(III) beneficial effects
Compared with the prior art, the invention provides the active carbon adsorption tower for treating the waste gas of the propane production and the operation process thereof, and has the following beneficial effects:
1. according to the active carbon adsorption tower for treating the waste gas in the propane production and the operation process thereof, the stepping motor is additionally arranged as a power end, and finally the scraping plate is driven to realize scraping operation on the surface of the active carbon adsorption layer, so that dust accumulated on the surface of the active carbon adsorption component is cleaned, holes of the active carbon adsorption layer are not blocked by dust for a long time, the permeability of the active carbon adsorption layer is ensured, the active carbon can be in more sufficient contact with gas, and the adsorption efficiency of the device is improved;
2. this active carbon adsorption tower for propane production exhaust-gas treatment and operation technology thereof, the second motor of adding establishes is as the power end, finally drives the vibrations head and strikes the surface of returning shape mounting bracket for returning shape mounting bracket and taking place to shake, add the second spring of establishing simultaneously and can give returning shape mounting bracket elasticity, make returning shape mounting bracket rock repeatedly, shake the dust in the active carbon adsorbed layer hole and fall in storing up the ash drawer, make things convenient for the staff to the clearance of dust.
Drawings
FIG. 1 is a schematic diagram of the design structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the raw flue gas inlet pipe according to the present invention;
FIG. 3 is a schematic view of a mounting bracket according to the present invention;
FIG. 4 is a schematic diagram of the mounting side view of the mounting bracket and seal layer of the present invention;
FIG. 5 is a schematic cross-sectional view of the mounting bracket and sealing layer of the present invention;
FIG. 6 is an enlarged schematic view of the structure of FIG. 4 according to the present invention;
FIG. 7 is a process flow diagram of the design of the present invention.
In the figure: 1. an adsorption tower body; 2. raw flue gas enters the pipe; 3. a mounting bracket; 4. a first motor; 5. a fan blade; 6. a loop-shaped mounting rack; 7. an activated carbon adsorption layer; 8. a stepping motor; 9. a screw rod; 10. a moving block; 11. a scraper; 12. a slide block; 13. a chute; 14. a sealing layer; 15. a demister area; 16. a mounting base; 17. a shower pipe; 18. a spray branch pipe; 19. a second motor; 20. a cam; 21. a mounting chamber; 22. a spacing chamber; 23. a first spring; 24. a connecting rod; 25. a vibrating head; 26. a moving plate; 27. a second spring; 28. an ash storage tank; 29. an ash storage drawer.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present invention. All other embodiments, which are apparent to those skilled in the art from consideration of the specification of the invention disclosed herein, are intended to be within the scope of the invention as claimed.
Example 1
The invention provides a technical scheme, the active carbon adsorption tower for propane production waste gas treatment comprises an adsorption tower body 1, a raw flue gas inlet pipe 2, a mounting bracket 3, a first motor 4, a fan blade 5, a square mounting bracket 6, an active carbon adsorption layer 7, a stepping motor 8, a screw rod 9, a moving block 10, a scraping plate 11, a sliding block 12, a sliding groove 13, a sealing layer 14, a demister area 15, a mounting seat 16, a spray pipe 17, a spray branch pipe 18, a second motor 19, a cam 20, a mounting cavity 21, a limiting cavity 22, a first spring 23, a connecting rod 24, a vibration head 25, a moving plate 26, a second spring 27, an ash storage groove 28 and an ash storage drawer 29, referring to fig. 1, the raw flue gas inlet pipe 2 is mounted at the lower part of the right side of the adsorption tower body 1, referring to fig. 2, the mounting bracket 3 is fixed in the inner cavity of the raw flue gas inlet pipe 2, the first motor 4 is fixed on the surface of the mounting bracket 3, the rotor of the first motor 4 is coaxially fixed with a fan blade 5, the first motor 4 is started to drive the fan blade 5 to rotate, the fan blade 5 rotates to suck the waste gas into the device through the raw gas inlet pipe 2, the inner wall of the raw gas inlet pipe 2 is fixed with a square mounting frame 6, referring to fig. 3, the inner cavity of the square mounting frame 6 is provided with an activated carbon adsorption layer 7, the inside of the activated carbon adsorption layer 7 is filled with activated carbon for adsorbing harmful substances and dust in the waste gas, the dust-containing gas is powered by a fan, positive pressure or negative pressure enters the tower body, because unbalanced and unsaturated molecular attraction or chemical strength exists on the solid surface of the activated carbon, when the solid surface contacts with the gas, gas molecules can be attracted, so that the solid surface is concentrated and kept on the solid surface, the polluted substances are adsorbed, and after the waste gas passes through the filter, entering a dust exhaust system of equipment, purifying gas is discharged up to the standard in high altitude, a stepping motor 8 is fixed on the inner wall of the right side of a rectangular mounting frame 6, a screw rod 9 is coaxially fixed on the rotor of the stepping motor 8, the left end of the screw rod 9 is mounted on the inner wall of the rectangular mounting frame 6 through a bearing, a moving block 10 is meshed with the periphery of the screw rod 9, a scraping plate 11 is fixed on the lower surface of the moving block 10, the scraping plate 11 is tightly contacted with the surface of an activated carbon adsorption layer 7, the rotor of the stepping motor 8 is started to coaxially rotate clockwise, the screw rod 9 can be driven to move clockwise, the scraping plate 11 can also move leftwards along with the moving block 10 to clean dust accumulated on the surface of the activated carbon adsorption layer 7, the rotor of the stepping motor 8 is started to coaxially rotate anticlockwise, the screw rod 9 can be driven to rotate anticlockwise, the moving block 10 can be driven to move rightwards, the scraping plate 11 can move rightwards along with the moving block 10, so that the scraping plate 11 repeatedly cleans dust accumulated on the surface of the activated carbon adsorption layer 7, holes of the activated carbon adsorption layer 7 are not blocked by dust for a long time, the permeability of the activated carbon adsorption layer 7 is ensured, activated carbon can be in full contact with gas, the adsorption efficiency of the device is improved, the sliding block 12 is fixed at the lower end of the scraping plate 11, the sliding groove 13 is arranged at the position corresponding to the sliding block 12 of the mounting bracket 3, the sliding block 12 is matched with the sliding groove 13 in position and size, the sealing layer 14 is filled between the rectangular mounting bracket 6 and the inner wall of the original flue gas inlet pipe 2, the upper part of the adsorption tower body 1 is a demister area 15, the top of the demister area 15 is a flue gas outlet, the lower part of the left side of the adsorption tower body 1 is fixedly provided with a mounting seat 16, the upper surface of the mounting seat 16 is provided with a spray pipe 17, the mounting seat 16 is connected with the spray pipe 17 in a communicating way, the right part of the spray pipe 17 is provided with a spray branch pipe 18, the spray branch pipe 18 is positioned in the inner cavity of the adsorption tower body 1, please refer to fig. 6, the inner wall of the sealing layer 14 is fixedly provided with a second motor 19, the rotor of the second motor 19 is coaxially fixedly provided with a cam 20, the inner cavity of the sealing layer 14 is provided with a mounting cavity 21, the inner cavity of the mounting cavity 21 is provided with a limiting cavity 22, the inner cavity of the limiting cavity 22 is fixedly provided with a first spring 23, the inner cavity of the first spring 23 is provided with a connecting rod 24, the left end of the connecting rod 24 penetrates through the side wall of the mounting cavity 21 to be fixedly provided with a vibration head 25, the right end of the first spring 23 is fixedly provided with a movable plate 26, and the movable plate 26 is embedded in the inner cavity of the limiting cavity 22, please refer to fig. 5, the inner wall of the sealing layer 14 is fixedly provided with a second spring 27, referring to fig. 4, the lower surface of the raw flue gas inlet pipe 2 is provided with an ash storage groove 28, the ash storage groove 28 is communicated with the inner cavity of the sealing layer 14, the bottom of the square mounting frame 6 is provided with an opening and is communicated with the inner cavity of the sealing layer 14, an ash storage drawer 29 is inserted into the inner cavity of the ash storage groove 28, the rotor of the second motor 19 is started to coaxially rotate through the switch button of the second motor 19 to drive the cam 20 to rotate, when the bulge of the cam 20 faces the moving plate 26, the moving plate 26 can be extruded, the moving plate 26 is extruded to extrude the second spring 27 and the connecting rod 24, the connecting rod 24 can drive the vibration head 25 to impact the surface of the square mounting frame 6, the square mounting frame 6 is vibrated by impact, the second spring 27 also vibrates, the square mounting frame 6 is given elasticity, the square mounting frame 6 is repeatedly vibrated, the dust in the holes of the activated carbon adsorption layer 7 is shaken down into the dust storage drawer 29, and finally the dust storage drawer 29 is pulled out of the dust storage groove 28 to clean the dust.
Example 2
2. A process for treating an exhaust gas from propane production according to claim 1, comprising the steps of:
referring to figure 7 of the drawings in which,
s1, entering waste gas;
the fan provides power to pump the waste gas into the adsorption tower body 1;
s2, adsorbing by activated carbon;
the activated carbon has developed gaps, large surface area and very high adsorption property, is used for adsorbing harmful substances and dust in the exhaust gas, is adsorbed and installed at an air outlet of a fan, and is used for filtering the exhaust gas entering the device;
s3, spraying reaction;
spraying water mist into the adsorption tower body 1 through a spray pipe 17, neutralizing dust-containing gas, reacting harmful substances contained in the waste gas, spraying and scrubbing the dust-containing gas in the tower through a reaction process of spraying and scrubbing neutralizing liquid, fully mixing waste gas such as hydrogen fluoride, sulfur dioxide, hydrogen chloride, chlorine, hydrogen sulfide, nitrogen oxides, various acid mist and the like contained in the waste gas with the water mist of the neutralizing liquid, fully neutralizing the waste gas to form better gas-liquid two-phase intersection, forming a porous contact surface treatment layer in a filler layer in the scrubbing tower after the sprayed water mist, further treating the gas, starting a water pump for 2 minutes during each use, starting a blower, and interrupting the blower for 1 minute after the shutdown;
s4, exhaust gas is discharged;
the waste gas enters a dust discharging system of equipment after passing through a filter, and the waste gas is discharged to the atmosphere after being inspected and the dust reaching the standard is less than or equal to 120mg/m < 3 > through a waste gas monitoring instrument.
Example 3
This embodiment differs from embodiment 2 in that:
s3, spraying reaction;
the spray pipe 17 sprays water mist into the adsorption tower body 1, the water mist can be neutralized with dust-containing gas, harmful substances contained in the waste gas are reacted, the dust-containing gas is sprayed and scrubbed with neutralizing liquid in the tower, waste gas such as hydrogen fluoride, sulfur dioxide, hydrogen chloride, chlorine, hydrogen sulfide, nitrogen oxides, various acid mist and the like contained in the waste gas is fully contacted and mixed with the water mist of the neutralizing liquid and is fully neutralized, better gas-liquid intersection is formed, sprayed water mist forms a treatment layer with a larger porous contact surface in a filler layer in the scrubbing tower, the gas is further treated, a water pump is turned on for 2.5 minutes during each operation, a blower is started, and a blower is stopped for 1.5 minutes after the shutdown.
Example 4
This embodiment differs from embodiment 2 in that:
s3, spraying reaction;
the spray pipe 17 sprays water mist into the adsorption tower body 1, the water mist can be neutralized with dust-containing gas, harmful substances contained in the waste gas are reacted, the dust-containing gas is sprayed and scrubbed with neutralizing liquid in the tower, waste gas such as hydrogen fluoride, sulfur dioxide, hydrogen chloride, chlorine, hydrogen sulfide, nitrogen oxides, various acid mist and the like contained in the waste gas is fully contacted and mixed with the water mist of the neutralizing liquid and is fully neutralized, better gas-liquid intersection is formed, sprayed water mist forms a treatment layer with a larger porous contact surface in a filler layer in the scrubbing tower, the gas is further treated, a water pump is started for 3 minutes during each use, a blower is started, and a blower is stopped for 2 minutes after the gas is stopped.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While embodiments of the present design have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made therein without departing from the principles and spirit of the present design, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an active carbon adsorption tower for propane production exhaust treatment, includes adsorption tower body (1), its characterized in that: the utility model discloses a flue gas adsorption tower, including adsorption tower body (1), former flue gas admission pipe (2), inner chamber of former flue gas admission pipe (2) is fixed with installing support (3), the fixed surface of installing support (3) has first motor (4), the rotor of first motor (4) is coaxial to be fixed with flabellum (5), the inner wall of former flue gas admission pipe (2) is fixed with back shape mounting bracket (6), active carbon adsorption layer (7) are installed to the inner chamber of back shape mounting bracket (6), the right side inner wall of back shape mounting bracket (6) is fixed with step motor (8), the rotor coaxial fixed with lead screw (9) of step motor (8), the left end of lead screw (9) is installed on the inner wall of back shape mounting bracket (6) through the bearing, the periphery meshing of lead screw (9) has movable block (10), the lower fixed surface scraper blade (11) of movable block (10), and the surface close contact of scraper blade (11) and active carbon adsorption layer (7), back shape mounting bracket (6) and former flue gas admission pipe (2) are filled between sealing layer (14).
2. An activated carbon adsorption tower for treating waste gas from propane production according to claim 1, wherein: the inner wall of sealing layer (14) is fixed with second motor (19), the rotor coaxial of second motor (19) is fixed with cam (20), installation cavity (21) have been seted up to the inner chamber of sealing layer (14), spacing cavity (22) have been seted up to the inner chamber of installation cavity (21), the inner chamber of spacing cavity (22) is fixed with first spring (23), the inner chamber of first spring (23) is equipped with connecting rod (24), the lateral wall that the left end of connecting rod (24) runs through installation cavity (21) is fixed with vibrations head (25), the right-hand member of first spring (23) is fixed with movable plate (26), and movable plate (26) are embedded in the inner chamber of spacing cavity (22), the inner wall of sealing layer (14) is fixed with second spring (27), the surface of second spring (27) links to each other with the surface of return-form mounting bracket (6), ash storage groove (28) have been seted up to the lower surface of former flue gas admission pipe (2), ash storage groove (28) communicate with the inner chamber (14), the right-hand member of first spring (23) is fixed with the inner chamber (28), and the inner chamber (28) of sealing layer (28) is equipped with ash storage groove (29).
3. An activated carbon adsorption tower for treating waste gas from propane production according to claim 1, wherein: the lower end of the scraping plate (11) is fixedly provided with a sliding block (12), a sliding groove (13) is formed in the position, corresponding to the sliding block (12), of the mounting bracket (3), and the sliding block (12) is matched with the sliding groove (13) in position and size.
4. An activated carbon adsorption tower for treating waste gas from propane production according to claim 1, wherein: the upper portion of adsorption tower body (1) is defroster region (15), and the top in defroster region (15) is the flue gas export.
5. An activated carbon adsorption tower for treating waste gas from propane production according to claim 1, wherein: the adsorption tower is characterized in that an installation seat (16) is fixed at the lower part of the left side of the adsorption tower body (1), and a spray pipe (17) is installed on the upper surface of the installation seat (16).
6. An activated carbon adsorption tower for treating waste gas from propane production according to claim 5, wherein: the installation seat (16) is communicated with the spray pipe (17), a spray branch pipe (18) is installed at the right part of the spray pipe (17), and the spray branch pipe (18) is located in the inner cavity of the adsorption tower body (1).
7. The process for operating an activated carbon adsorption column for treating exhaust gas from propane production according to claim 1, comprising the steps of:
s1, entering waste gas;
the fan provides power to pump the waste gas into the adsorption tower body (1);
s2, adsorbing by activated carbon;
the activated carbon has developed gaps, large surface area and very high adsorption property, and is used for adsorbing harmful substances and dust in waste gas;
s3, spraying reaction;
spraying water mist into the adsorption tower body (1) through a spray pipe, and neutralizing with dust-containing gas to react with harmful substances contained in the waste gas;
s4, exhaust gas is discharged;
the waste gas enters the dust exhaust system of the equipment after passing through the filter, and the waste gas is discharged at high altitude after being checked.
8. The process for operating an activated carbon adsorption column for treating exhaust gas from propane production according to claim 7, wherein: in step S2, activated carbon is adsorbed and installed at the air outlet of the fan, and waste gas entering the device is filtered.
9. The process for operating an activated carbon adsorption column for treating exhaust gas from propane production according to claim 7, wherein: in the step S3, the spray tower water pump is turned on for 2-3 minutes every time when the fan is used, the blower is started, and the blower is stopped for 1-2 minutes after the fan is stopped.
10. The process for operating an activated carbon adsorption column for treating exhaust gas from propane production according to claim 7, wherein: in the step S4, the dust is discharged to the atmosphere after passing through an exhaust gas monitoring instrument, wherein the dust is less than or equal to 120mg/m < 3 >.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210377665.9A CN115990390A (en) | 2022-04-12 | 2022-04-12 | Active carbon adsorption tower for treating waste gas generated in propane production and operation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210377665.9A CN115990390A (en) | 2022-04-12 | 2022-04-12 | Active carbon adsorption tower for treating waste gas generated in propane production and operation process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117282248A (en) * | 2023-08-29 | 2023-12-26 | 安徽恒光聚氨酯材料有限公司 | Three-waste treatment process and system in production of N-phenylmaleimide acid |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117282248A (en) * | 2023-08-29 | 2023-12-26 | 安徽恒光聚氨酯材料有限公司 | Three-waste treatment process and system in production of N-phenylmaleimide acid |
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