CN111821819A - Waste gas recovery processing cyclic utilization system in hydrogen production - Google Patents
Waste gas recovery processing cyclic utilization system in hydrogen production Download PDFInfo
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- CN111821819A CN111821819A CN202010655591.1A CN202010655591A CN111821819A CN 111821819 A CN111821819 A CN 111821819A CN 202010655591 A CN202010655591 A CN 202010655591A CN 111821819 A CN111821819 A CN 111821819A
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- box body
- waste gas
- sliding seat
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- 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
- B01D53/22—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 diffusion
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- 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
- B01D53/22—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 diffusion
- B01D2053/221—Devices
Abstract
The invention discloses a waste gas recycling system in hydrogen production, which comprises a box body, wherein an air inlet pipe is fixedly connected to one side of the box body, a pressure gauge is installed at the top end of the air inlet pipe, the pressure gauge fixedly penetrates through the box body, an isolating device is arranged above the pressure gauge, the isolating device is installed in the box body, a rolling device is fixedly connected to one side of the isolating device, the rolling device is installed on the box body, a guide rail is fixedly connected to the inner wall of the box body above the isolating device, a membrane separator is slidably clamped in the guide rail, a through hole is formed in the box body at the side, away from the guide rail, of the membrane separator, a moving device is arranged in the through hole, the moving device is installed on the box body, so that the waste gas is utilized more fully, the resource waste is reduced, the invention has simple operation and strong inventiveness and is convenient for popularization and use.
Description
Technical Field
The invention relates to the technical field of mechanical equipment, in particular to a waste gas recycling system in hydrogen production.
Background
Various waste gases are generated in the hydrogen production, wherein waste hydrogen exists in the waste gases, and the prior waste hydrogen recovery technology comprises a low-temperature separation method, a temperature swing adsorption method, a pressure swing adsorption separation technology, a gas membrane separation technology and a metal hydride separation technology.
In the prior art, most of waste hydrogen generated in hydrogen production is not recycled, a few recycling devices are complex in operation and low in recycling rate, so that resource waste is caused, and income is influenced.
Disclosure of Invention
The invention aims to provide a waste gas recycling system in hydrogen production to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a waste gas recovery handles cyclic utilization system in hydrogen production, includes the box, box one side fixed connection intake pipe, the manometer is installed on the intake pipe top, the manometer is fixed to run through the box, the manometer top is equipped with isolating device, isolating device installs and is located the box, isolating device one side fixed connection coiling mechanism, the coiling mechanism is installed and is located the box, fixed connection guide rail on the isolating device top box inner wall, sliding joint membrane separator in the guide rail, the membrane separator is kept away from and is equipped with the through-hole on the box of guide rail one side, be equipped with the mobile device in the through-hole, the mobile device installation is located on the box.
Preferably, the air inlet pipe is located on the lower half part of the box body, the pressure gauge display is located on the outer side of the box body, the pressure monitoring equipment of the pressure gauge is located in the box body, and the pressure gauge is an intelligent digital display pressure gauge.
Preferably, the isolating device comprises a fixed seat, the fixed seat is fixedly connected with the inner wall of the box body, the fixed seat is fixedly connected with a fixed plate, the free end of the fixed plate is fixedly connected with a spring, the free end of the spring is fixedly connected with a sliding seat, and the sliding seat is clamped on the fixed plate in a sliding manner.
Preferably, the fixing seat is of an inverted concave structure, the spring is an extension spring, the sliding seat is of an inverted concave structure, and the sum of the lengths of the sliding seat and the fixing plate is greater than that of the fixing seat.
Preferably, the winding device comprises a pull rope, one end of the pull rope is fixedly connected with one end of the sliding seat far away from the fixed plate, the pull rope penetrates through the box body in a sliding mode to be connected with a winding wheel, the winding wheel is installed on the outer side of the box body, and the winding wheel has a locking function.
Preferably, the guide rail is of an inverted concave structure, the membrane separator is a TBM membrane, and the through hole is of a convex structure.
Preferably, the mobile device includes the baffle, the baffle slides and is located the through-hole, the baffle removes and cuts off the through-hole, baffle and connecting rod threaded connection, the joint box is rotated on the connecting rod top, fixed first bevel gear that runs through on the connecting rod, first bevel gear and second bevel gear meshing, the second bevel gear rotates the installation and is located the box, the motor is connected to the second bevel gear, the motor is located the box outside through the support mounting, the baffle height is greater than the through-hole lower half height, the connecting rod lower half is equipped with the screw thread.
Preferably, the rolling wheel (52) is controlled to rotate to prohibit waste gas from entering the upper part of the sliding seat (44) by controlling the rolling wheel (52) and the driving motor (95) to ensure that the baffle (91) can accurately move to the upper half part of the through hole (8) and then stop by controlling the rolling wheel (52) and the driving motor (95) when the membrane separator (7) is blocked, and then the membrane separator (7) can be taken out for replacement treatment by the lower half part of the through hole (8), and the specific steps comprise,
step A1: an equation is obtained using the equation (1) regarding the time taken for the take-up pulley (52) to complete the complete prohibition of the exhaust gas from entering above the shoe (44)
Wherein t represents the time taken for the take-up pulley (52) to complete the rotation and completely prohibit the exhaust gas from entering the upper part of the sliding seat (44); l represents the distance between the sliding seat (44) and the box body (1); v represents the maximum speed at which the take-up wheel (52) can rotate; solving the equation to finally obtain the time for the rolling wheel (52) to rotate and complete the complete prohibition of the waste gas from entering the upper part of the sliding seat (44);
step A2: the formula (2) is used to obtain the relation between the average speed value of the driving motor (95) when the speed is not reduced and the sliding distance of the sliding seat (44) during the speed reduction
Wherein H represents the sliding distance of the sliding seat (44) for deceleration; vqRepresents an average speed value when the drive motor (95) is not decelerated;
step A3: the time for completely forbidding the exhaust gas from entering the winding wheel (52) after the rotation is completed and calculated by the formula (1) is combined with the relational expression of the formula (2) to determine the average speed value of the driving motor (95) when the speed is not reduced by the formula (3)
Wherein f (V)q) For obtaining H with respect to V by arranging formula (2)qEquation (H) ═ f (V)q) (ii) a Solving the formula (3) to obtain Vq，VqThe average speed value when the driving motor (95) is not decelerated is represented, namely the value to which the driving motor (95) needs to be controlled to accelerate; using VqThe value is ensured so that the baffle (91) can accurately move to the upper half part of the through hole (8) and then stop when the waste gas is completely forbidden to enter the upper part of the sliding seat (44), and the membrane separator (7) can be taken out for replacement treatment through the lower half part of the through hole (8).
Compared with the prior art, the invention has the beneficial effects that:
1. the winding device and the isolating device are operated, the work of recycling the waste gas is completed at the moment, the waste gas is more fully utilized, the resource waste is reduced, the income is improved, and the use by customers is facilitated.
2. The membrane separator replacing work is completed by operating the rolling device and the moving device, so that the membrane separator can be replaced quickly, the pollution caused by waste gas leakage is avoided, and the environment is protected.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of an isolation device according to the present invention;
FIG. 3 is an enlarged view of the invention at A in FIG. 1.
In the figure: the device comprises a box body 1, an air inlet pipe 2, a pressure gauge 3, an isolating device 4, a fixed seat 41, a fixed plate 42, a spring 43, a sliding seat 44, a winding device 5, a pulling rope 51, a winding wheel 52, a guide rail 6, a membrane separator 7, a through hole 8, a moving device 9, a baffle 91, a connecting rod 92, a first bevel gear 93, a second bevel gear 94 and a motor 95.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a waste gas recycling system in hydrogen production comprises a box body 1, one side of the box body 1 is fixedly connected with an air inlet pipe 2, the air inlet pipe 2 is positioned at the lower half part of the box body 1, the top end of the air inlet pipe 2 is provided with a pressure gauge 3, the pressure gauge 3 is fixedly penetrated through the box body 1, a display of the pressure gauge 3 is positioned at the outer side of the box body 1, a pressure monitoring device of the pressure gauge 3 is positioned in the box body 1, the pressure gauge 3 is an intelligent digital display pressure gauge, an isolating device 4 is arranged above the pressure gauge 3, the isolating device 4 is arranged in the box body 1, the isolating device 4 comprises a fixed seat 41, the fixed seat 41 is fixedly connected with the inner wall of the box body 1, a fixed plate 42 is fixedly connected on the fixed seat 41, a spring 43 is fixedly connected with a free end of the spring 43, the sliding seat 44 is of an inverted 'concave' structure, the length of the sliding seat 44 and the fixing plate 42 is larger than that of the fixing seat 41, one side of the isolating device 4 is fixedly connected with the winding device 5, the winding device 5 is arranged on the box body 1, the winding device 5 comprises a pull rope 51, one end of the pull rope 51 is fixedly connected with one end of the sliding seat 44 far away from the fixing plate 42, the pull rope 51 penetrates through the box body 1 in a sliding mode and is connected with a winding wheel 52, the winding wheel 52 is arranged on the outer side of the box body 1, the winding wheel 52 has a locking function, firstly, waste hydrogen enters the box body 1 through the air inlet pipe 2, the air pressure of waste gas in the box body 1 is observed through the pressure gauge 3, when the air pressure reaches 3.5MPa, a locking switch on the winding wheel 52 is opened, the spring 43 restores to be original, the sliding seat 44 is pulled to move towards one side of the fixing plate 42, the hydrogen separated by the membrane separator 7 enters the box body 1 above the membrane separator 7, and the work of recycling the waste gas is completed at the moment, so that the waste gas is more fully utilized, the resource waste is reduced, the income is further improved, and the use by customers is convenient.
The inner wall of a box body 1 above an isolating device 4 is fixedly connected with a guide rail 6, a membrane separator 7 is slidably clamped in the guide rail 6, a through hole 8 is arranged on the box body 1 at one side of the membrane separator 7, which is far away from the guide rail 6, the guide rail 6 is of an inverted concave structure, the membrane separator 7 is a TBM membrane, the through hole 8 is of a convex structure, a moving device 9 is arranged in the through hole 8, the moving device 9 is arranged on the box body 1, the moving device 9 comprises a baffle 91, the baffle 91 is slidably arranged in the through hole 8, the baffle 91 movably partitions the through hole 8, the baffle 91 is in threaded connection with a connecting rod 92, the top end of the connecting rod 92 is rotatably clamped in the box body 1, a first bevel gear 93 is fixedly penetrated on the connecting rod 92, the first bevel gear 93 is meshed with a second bevel gear 94, the second bevel gear 94 is rotatably arranged on the box body 1, the second bevel gear, the lower half part of the connecting rod 92 is provided with threads, the numerical value of the pressure gauge 3 is observed, when the pressure value is continuously increased, the membrane separator has a blocking condition, the winding wheel 52 needs to be rotated, the sliding seat 44 is pulled to be attached to the inner wall of the box body 1 through the pull rope 51, waste gas is prohibited to enter the upper part of the sliding seat 44, the second bevel gear 94 is rotated through the driving motor 95, the second bevel gear 94 is meshed with the first bevel gear 93, the connecting rod 92 is rotated, the baffle 91 is pulled to slide upwards in the through hole 8 through the threaded connection relation between the connecting rod 92 and the baffle 91, when the baffle 91 is moved to the upper half part of the through hole 8, the driving motor 95 is stopped, the membrane separator 7 is taken out through the lower half part of the through hole 8 for replacement treatment, the operations are reversely carried out after the replacement is completed, the equipment continues to normally work, the method is more environment-friendly, simple to operate, strong in inventiveness and convenient to popularize and use.
The working principle is as follows: firstly, waste hydrogen enters a box body 1 through an air inlet pipe 2, the pressure of waste gas in the box body 1 is observed through a pressure gauge 3, when the pressure reaches 3.5MPa, a locking switch on a winding wheel 52 is opened, a spring 43 restores to pull a sliding seat 44 to move to one side of a fixed plate 42, the sliding seat 44 pulls a pull rope 51 to move simultaneously, the winding wheel 52 rotates to push out a winding pull rope 51, the waste gas enters a membrane separator 7 through a gap between the sliding seat 44 and the inner wall of the box body 1, hydrogen is separated out through the membrane separator 7 and enters the box body 1 above the membrane separator 7, the waste gas recycling work is completed at the moment, the waste gas is more fully utilized, the resource waste is reduced, the benefit is improved, the use by customers is facilitated, the numerical value of the pressure gauge 3 is observed, when the pressure value is continuously increased, the membrane separator has a blocking condition, the winding wheel 52 needs to be, the waste gas is forbidden to enter the upper part of the sliding seat 44, the second bevel gear 94 is rotated by the driving motor 95, the second bevel gear 94 is meshed with the first bevel gear 93, the connecting rod 92 is rotated, the baffle plate 91 is pulled to slide upwards in the through hole 8 through the threaded connection relation between the connecting rod 92 and the baffle plate 91, when the baffle plate 91 moves to the upper half part of the through hole 8, the driving motor 95 is stopped, the membrane separator 7 is taken out through the lower half part of the through hole 8 for replacement, the operation is carried out reversely after the replacement is finished, the equipment continues to work normally, the replacement work of the membrane separator is finished at the moment, the membrane separator can be replaced quickly, and the pollution caused by the leakage of the waste gas is avoided.
In one embodiment, the rolling wheel (52) is controlled to rotate to prohibit waste gas from entering the upper part of the sliding seat (44) by controlling the rolling wheel (52) and the driving motor (95) to ensure that when the membrane separator (7) is blocked, the baffle (91) can accurately move to the upper half part of the through hole (8) and then stop by the driving motor (95), and then the membrane separator (7) can be taken out through the lower half part of the through hole (8) for replacement treatment, and the specific steps comprise,
step A1: an equation is obtained using the equation (1) regarding the time taken for the take-up pulley (52) to complete the complete prohibition of the exhaust gas from entering above the shoe (44)
Wherein t represents the time taken for the take-up pulley (52) to complete the rotation and completely prohibit the exhaust gas from entering the upper part of the sliding seat (44); l represents the distance between the sliding seat (44) and the box body (1); v represents the maximum speed at which the take-up wheel (52) can rotate; solving the equation to finally obtain the time for the rolling wheel (52) to rotate and complete the complete prohibition of the waste gas from entering the upper part of the sliding seat (44);
step A2: the formula (2) is used to obtain the relation between the average speed value of the driving motor (95) when the speed is not reduced and the sliding distance of the sliding seat (44) during the speed reduction
Wherein H represents the sliding distance of the sliding seat (44) for deceleration; vqRepresents the average speed of the drive motor (95) when not deceleratingA value of the metric;
step A3: the time for completely forbidding the exhaust gas from entering the winding wheel (52) after the rotation is completed and calculated by the formula (1) is combined with the relational expression of the formula (2) to determine the average speed value of the driving motor (95) when the speed is not reduced by the formula (3)
Wherein f (V)q) For obtaining H with respect to V by arranging formula (2)qEquation (H) ═ f (V)q) (ii) a Solving the formula (3) to obtain Vq，VqThe average speed value when the driving motor (95) is not decelerated is represented, namely the value to which the driving motor (95) needs to be controlled to accelerate; using VqThe value is ensured so that the baffle (91) can accurately move to the upper half part of the through hole (8) and then stop when the waste gas is completely forbidden to enter the upper part of the sliding seat (44), and the membrane separator (7) can be taken out for replacement treatment through the lower half part of the through hole (8).
The beneficial effects of the above technical scheme are: an equation about the time taken for the winding wheel (52) to complete the complete prohibition of the exhaust gas from entering the upper portion of the sliding seat (44) is obtained by using the step A1, in order to determine the time according to the relationship of the equation (1) as a subsequent guarantee that the baffle (91) can move to the upper half portion of the through hole (8) and then stop without error when the exhaust gas is completely prohibited from entering the upper portion of the sliding seat (44); a relational expression of the average speed value of the driving motor (95) when the driving motor (95) is not decelerated and the sliding distance of the sliding seat (44) when the driving motor (95) is decelerated is obtained by using a formula (2) in the step A2, the purpose is to analyze the sliding distance of the sliding seat (44) decelerated caused by the average speed when the driving motor (95) is not decelerated by using the formula so as to achieve the purpose of seamless connection, the average speed value of the driving motor (95) when the driving motor (95) is not decelerated is obtained by using a formula (3) in the step A3, the value to which the driving motor (95) is accelerated can be controlled, and therefore the purpose that the baffle (91) of the whole system accurately moves to the upper half part of the through hole (8) and then stops when the waste gas is completely forbidden to enter the upper part of the sliding seat (44) is achieved, the purpose of seamless connection is.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an exhaust gas recovery handles cyclic utilization system in hydrogen production, includes box (1), its characterized in that: one side of the box body (1) is fixedly connected with an air inlet pipe (2), the top end of the air inlet pipe (2) is provided with a pressure gauge (3), the pressure gauge (3) is fixedly penetrated through the box body (1), an isolating device (4) is arranged above the pressure gauge (3), the isolating device (4) is arranged in the box body (1), one side of the isolating device (4) is fixedly connected with the winding device (5), the winding device (5) is arranged on the box body (1), a guide rail (6) is fixedly connected on the inner wall of the box body (1) above the isolating device (4), the membrane separator (7) is clamped in the guide rail (6) in a sliding way, a through hole (8) is arranged on the box body (1) at one side of the membrane separator (7) far away from the guide rail (6), and a moving device (9) is arranged in the through hole (8), and the moving device (9) is arranged on the box body (1).
2. The system for recycling and treating the waste gas generated in the hydrogen production according to claim 1, wherein: intake pipe (2) are located box (1) lower half, manometer (3) display is located the box (1) outside, manometer (3) pressure monitoring equipment is located box (1), manometer (3) are intelligent digital display manometer.
3. The system for recycling and treating the waste gas generated in the hydrogen production according to claim 1, wherein: isolating device (4) includes fixing base (41), fixing base (41) fixed connection box (1) inner wall, fixed connection fixed plate (42) on fixing base (41), fixed plate (42) free end fixed connection spring (43), spring (43) free end fixed connection sliding seat (44), sliding seat (44) slip joint is on fixed plate (42).
4. The system for recycling and treating the waste gas generated in the hydrogen production according to claim 3, wherein: the fixing seat (41) is of an inverted concave structure, the spring (43) is an extension spring, the sliding seat (44) is of an inverted concave structure, and the sum of the lengths of the sliding seat (44) and the fixing plate (42) is greater than that of the fixing seat (41).
5. The system for recycling and treating the waste gas generated in the hydrogen production according to claim 1, wherein: the winding device (5) comprises a pull rope (51), one end of the pull rope (51) is fixedly connected with one end of a sliding seat (44) far away from the fixed plate (42), the pull rope (51) penetrates through the box body (1) in a sliding mode to be connected with a winding wheel (52), the winding wheel (52) is installed on the outer side of the box body (1), and the winding wheel (52) has a locking function.
6. The system for recycling and treating the waste gas generated in the hydrogen production according to claim 1, wherein: the guide rail (6) is of an inverted concave structure, the membrane separator (7) is a TBM membrane, and the through hole (8) is of a convex structure.
7. The system for recycling and treating the waste gas generated in the hydrogen production according to claim 1, wherein: mobile device (9) are including baffle (91), baffle (91) slide to be located through-hole (8), baffle (91) remove to cut off through-hole (8), baffle (91) and connecting rod (92) threaded connection, joint box (1) is rotated on connecting rod (92) top, fixed first bevel gear (93) of running through on connecting rod (92), first bevel gear (93) and second bevel gear (94) meshing, second bevel gear (94) rotate the installation and are located box (1), motor (95) is connected in second bevel gear (94), motor (95) are located the box (1) outside through the support mounting, baffle (91) height is greater than through-hole (8) lower half height, connecting rod (92) lower half is equipped with the screw thread.
8. The system for recycling and treating the waste gas generated in the hydrogen production according to claim 1, wherein: the rolling wheel (52) is controlled to rotate to prohibit waste gas from entering the upper part of the sliding seat (44) by controlling the rolling wheel (52) and the driving motor (95) to ensure that the baffle (91) can accurately move to the upper half part of the through hole (8) and then stop by controlling the rolling wheel (52) and the driving motor (95) when the membrane separator (7) is blocked, and then the membrane separator (7) can be taken out for replacement treatment by the lower half part of the through hole (8), and the specific steps comprise,
step A1: an equation is obtained using the equation (1) regarding the time taken for the take-up pulley (52) to complete the complete prohibition of the exhaust gas from entering above the shoe (44)
Wherein t represents the time taken for the take-up pulley (52) to complete the rotation and completely prohibit the exhaust gas from entering the upper part of the sliding seat (44); l represents the distance between the sliding seat (44) and the box body (1); v represents the maximum speed at which the take-up wheel (52) can rotate; solving the equation to finally obtain the time for the rolling wheel (52) to rotate and complete the complete prohibition of the waste gas from entering the upper part of the sliding seat (44);
step A2: the formula (2) is used to obtain the relation between the average speed value of the driving motor (95) when the speed is not reduced and the sliding distance of the sliding seat (44) during the speed reduction
Wherein H represents the sliding distance of the sliding seat (44) for deceleration; vqRepresents an average speed value when the drive motor (95) is not decelerated;
step A3: the time for completely forbidding the exhaust gas from entering the winding wheel (52) after the rotation is completed and calculated by the formula (1) is combined with the relational expression of the formula (2) to determine the average speed value of the driving motor (95) when the speed is not reduced by the formula (3)
Wherein f (V)q) For obtaining H with respect to V by arranging formula (2)qEquation (H) ═ f (V)q) (ii) a Solving the formula (3) to obtain Vq，VqThe average speed value when the driving motor (95) is not decelerated is represented, namely the value to which the driving motor (95) needs to be controlled to accelerate; using VqThe value is ensured so that the baffle (91) can accurately move to the upper half part of the through hole (8) and then stop when the waste gas is completely forbidden to enter the upper part of the sliding seat (44), and the membrane separator (7) can be taken out for replacement treatment through the lower half part of the through hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655591.1A CN111821819A (en) | 2020-07-09 | 2020-07-09 | Waste gas recovery processing cyclic utilization system in hydrogen production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010655591.1A CN111821819A (en) | 2020-07-09 | 2020-07-09 | Waste gas recovery processing cyclic utilization system in hydrogen production |
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| Publication Number | Publication Date |
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| CN111821819A true CN111821819A (en) | 2020-10-27 |
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| CN202010655591.1A Withdrawn CN111821819A (en) | 2020-07-09 | 2020-07-09 | Waste gas recovery processing cyclic utilization system in hydrogen production |
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Cited By (1)
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| CN115468383A (en) * | 2022-09-26 | 2022-12-13 | 安徽碳鑫科技有限公司 | A high-efficient recovery unit of methyl alcohol waste gas for methyl alcohol production |
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| CN203620375U (en) * | 2013-12-16 | 2014-06-04 | 洋紫荆油墨（浙江）有限公司 | High-efficiency ink packing machine filtering mechanism |
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Application publication date: 20201027 |