CN219186383U

CN219186383U - Medicine packaging plastic-aluminum complex film VOC mixed gas recovery unit

Info

Publication number: CN219186383U
Application number: CN202223490224.4U
Authority: CN
Inventors: 张磊; 李全布; 赵刚; 黄湘晖; 王芳颖; 涂成波
Original assignee: Jiangyin Baobo Packing Co ltd
Current assignee: Jiangyin Baobo Packing Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-06-16
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a medicine packaging aluminum-plastic composite film VOC mixed gas recovery device, which comprises an adsorption tower, wherein the adsorption tower comprises a primary adsorption tower and a secondary adsorption tower, and the primary adsorption tower and the secondary adsorption tower are connected in series; the inlet end of the primary adsorption tower is connected with a gas recovery main pipe, the front end of the gas recovery main pipe is provided with a wind collecting box, the gas recovery main pipe is provided with a first fan, the outlet end of the secondary adsorption tower is connected with a discharge pipe, the discharge pipe is provided with a circulation loop through three-way connection, and the other end of the circulation loop is communicated to the inlet end of the first fan. The utility model uses the multistage condensation and multistage circulation desorption device, can completely recycle the solvents such as EAC, MEK and the like in the VOC mixed gas of the medical packaging aluminum-plastic composite film, can reuse the solvents in production, greatly reduces the production cost, solves the pollution of medical packaging aluminum-plastic composite film manufacturers to the environment, and can be a safe, environment-friendly and continuously operated VOC mixed gas recycling device.

Description

Medicine packaging plastic-aluminum complex film VOC mixed gas recovery unit

Technical Field

The utility model relates to the field of tail gas treatment equipment, in particular to a medicine packaging aluminum-plastic composite film VOC mixed gas recovery device.

Background

EAC, MEK, IPA and the like are solvents, are colorless and transparent liquids with pungent odor, and are refined products with wide application. The modified starch has excellent solubility and quick drying property, is an important industrial solvent for chemical raw materials and adhesives, and is particularly widely used in the paint industry and adhesives.

In the production process of the medical packaging aluminum-plastic composite film, most solvents required by the used adhesive are EAC or MEK as dilution solvents, when the adhesive is cured through a drying channel, the solvents in the adhesive solution are taken away by hot air flow under the action of high-temperature air, so that VOC gases mixed by hot air, EAC, MEK, IPA and the like are formed,

at present, the treatment mode of VOC mixed gas generated by medicinal aluminum-plastic composite by domestic medicine packaging production enterprises is as follows: firstly, natural gas is directly burnt, but the burning not only needs to consume redundant natural gas to increase the production cost, but also has larger pollution to the environment and does not meet the tail gas treatment standard.

And secondly, recovering the VOC mixed gas, wherein the specific process is to condense and recover the VOC mixed gas through a condenser, then adsorb the VOC mixed gas through a desorption tower, and then cool and recover the VOC mixed gas. It has the following disadvantages: in the second recovery process, EAC, MEK, IPA and the like in the mixed gas are recovered through only one-time adsorption, so that the emission is easy and does not reach the standard, and the environment is polluted; and the adsorption and desorption of the adsorption tower are intermittent operation, once the adsorption tower is required to be stopped after being saturated, the adsorption tower can be operated again after being desorbed and regenerated, so that the efficiency is lower, and the tail gas cannot be continuously treated.

In view of the above, it is necessary to provide a VOC mixed gas recovery apparatus for medical packaging aluminum-plastic composite films to solve the above problems.

Disclosure of Invention

The utility model aims to solve the technical problems, and provides a medicine packaging aluminum-plastic composite film VOC mixed gas recovery device which can continuously perform adsorption operation and enable the treated tail gas to reach the emission standard.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a medicine packing plastic-aluminum complex film VOC mixed gas recovery device, includes the adsorption tower, the adsorption tower includes primary adsorption tower and secondary adsorption tower, primary adsorption tower and secondary adsorption tower are the series connection; the inlet end of the primary adsorption tower is connected with a gas recovery main pipe, the front end of the gas recovery main pipe is provided with a wind collecting box, the gas recovery main pipe is provided with a first fan, the outlet end of the secondary adsorption tower is connected with a discharge pipe, the discharge pipe is provided with a circulation loop through three-way connection, and the other end of the circulation loop is communicated to the inlet end of the first fan.

Further, an exhaust gas detector and an exhaust control valve are arranged on the exhaust pipe.

Further, a circulation control valve is arranged on the three-way connected circulation loop.

Further, the concentration of the target solvent of the tail gas detector is more than 50mg/m ³ At this time, the discharge control valve is closed and the circulation control valve is opened.

Furthermore, four groups of first-stage adsorption towers are connected in parallel, and the four groups of first-stage adsorption towers are used for circularly carrying out adsorption operation, so that the VOC mixed gas recovery device is used for continuously treating the process gas.

Further, the gas recovery header pipe is connected with the inlet end of each primary adsorption tower through an inlet branch pipe, and the outlet end of each primary adsorption tower is connected to the secondary adsorption tower through an outlet branch pipe in a summarizing way.

Further, the device also comprises a desorption loop for desorbing the first-stage adsorption tower, wherein the desorption loop comprises a desorption tower, a heat exchanger, a second fan and a first heater; the tower top of the primary adsorption tower is connected with a desorption tower through a desorption upper pipe, the other end of the desorption tower is connected with the tower bottom of the primary adsorption tower through a desorption return pipe, the heat exchanger is arranged on the desorption upper pipe, the second fan is arranged on the desorption return pipe, and the outlet end of the second fan is provided with a first heater; a cold and hot water pipe is wound in each primary adsorption tower.

Further, still include recovery circuit, recovery circuit includes condenser, solvent recovery jar, third fan, second heater, the condenser entrance point is through retrieving the one end of upper tube coupling desorption tower, and one exit end of condenser is through retrieving the other end of return tube coupling desorption tower, be equipped with third fan and second heater on retrieving the return tube, the second heater sets up in third fan exit end, the second export of condenser is connected with the solvent recovery jar.

Further, the outlet branch pipe and the desorption return pipe are both provided with temperature sensors.

Compared with the prior art, the utility model has the beneficial effects that: the VOC mixed gas recycling device for the medical packaging aluminum-plastic composite film can completely recycle solvents such as EAC and MEK in the VOC mixed gas for the medical packaging aluminum-plastic composite film by using a multi-stage condensation and multi-stage circulation desorption device, and can recycle the solvents into production, thereby greatly reducing the production cost, solving the pollution of a manufacturer of the medical packaging aluminum-plastic composite film to the environment, and being safe, environment-friendly and continuously operated.

Drawings

FIG. 1 is a schematic flow chart of a VOC mixed gas recycling device of a medical packaging aluminum-plastic composite film;

in the figure: 1. a first-stage adsorption tower; 2. a second-stage adsorption tower; 3. a wind collecting box; 4. a first fan; 5. a discharge pipe; 6. a circulation loop; 7. a tail gas detector; 8. a discharge control valve; 9. a circulation control valve; 10. an inlet branch pipe; 11. an outlet branch pipe; 12. a desorption tower; 13. a heat exchanger; 14. a second fan; 15. a first heater; 16. removing the upper tube; 17. desorbing the return pipe; 18. a cold and hot water pipe; 19. a condenser; 20. a solvent recovery tank; 21. a third fan; 22. a second heater; 23. recovering the upper pipe; 24. a recycling return pipe; 25. a temperature sensor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Embodiment one:

the utility model provides a medicine packing plastic-aluminum complex film VOC mixed gas recovery device, as shown in fig. 1, including the adsorption tower, the difference with prior art lies in that the adsorption tower of this device includes primary adsorption tower 1 and secondary adsorption tower 2, primary adsorption tower 1 is the series connection with secondary adsorption tower 2, guarantees through two-stage absorption that the processing to the process gas of passing through reaches standard; the inlet end of the primary adsorption tower 1 is connected with a gas recovery main pipe, the front end of the gas recovery main pipe is provided with a wind collecting box 3, the gas recovery main pipe is provided with a first fan 4, the outlet end of the secondary adsorption tower 2 is connected with a discharge pipe 5, the discharge pipe 5 is provided with a tail gas detector 7 and a discharge control valve 8, the tail gas which flows through the tail gas detector 7 and is treated is monitored in real time, and the tail gas which is qualified in detection can be discharged to the air through the discharge control valve 8; active carbon is filled in the first-stage adsorption tower 1 and the second-stage adsorption tower 2, the discharge pipe 5 is provided with a circulation loop 6 through three-way connection, the other end of the circulation loop 6 is communicated to the inlet end of the first fan 4, and a circulation control valve 9 is arranged on the three-way connection circulation loop 6. If the concentration of the target solvent is more than 50mg/m < 3 > in the detection process, the emission control valve 8 is closed, the circulation control valve 9 is opened, and the gas which does not reach the standard in the treatment is enabled to enter the first-stage adsorption tower 1 again for adsorption treatment, so that the discharged tail gas is ensured to meet the standard. Compared with the prior art, the tail gas is incinerated, so that the pollution to the air can be avoided.

Embodiment two:

in order to continuously adsorb the tail gas, in this embodiment, four groups of first-stage adsorption towers 1 are arranged in parallel, and the four groups of first-stage adsorption towers 1 are circularly used for adsorbing operation, so that the VOC mixed gas recovery device continuously processes the process gas; in actual control, four groups of adsorption towers are respectively and circularly in the following four states: the adsorption state, the heating state, the regeneration state and the cooling state, namely, during production, one primary adsorption tower 1 is always in the adsorption state, and the primary adsorption towers 1 of each group are recycled for regeneration, so that the adsorption state is convenient to enter again, and it can be understood that the inlet branch pipe 10 and the outlet branch pipe 11 are in the open state during the adsorption state, and the other three states are in the closed state.

Specifically, as shown in fig. 1, the gas recovery header pipe is connected with the inlet end of each primary adsorption tower 1 through an inlet branch pipe 10, and the outlet end of the primary adsorption tower 1 is connected to the secondary adsorption tower 2 in a summarizing way through an outlet branch pipe 11; the inlet branch pipe 10 and the outlet branch pipe 11 are respectively provided with a cut-off valve, so that the use of each primary adsorption tower 1 is controlled, and when the primary adsorption tower 1 needs to adsorb, the inlet branch pipe 10 and the outlet branch pipe 11 are in an open state, so that the process gas passes through.

Further, when one first-stage adsorption tower 1 needs to be switched to the other first-stage adsorption tower 1 for adsorption according to a preset sequence during adsorption saturation, the first-stage adsorption tower 1 which is already in adsorption saturation enters a heating state, the heating is favorable for desorption of active carbon, a cold and hot water pipe 18 is wound in each first-stage adsorption tower 1, and when the desorption is performed, pressurized hot water flows in the cold and hot water pipe, the temperature exceeds 120 degrees, and the active carbon can be gradually heated; the first-stage adsorption tower 1 then enters a regenerated state.

The regeneration state is required to be matched with a desorption loop of the primary adsorption tower 1, and the desorption loop comprises a desorption tower 12, a heat exchanger 13, a second fan 14 and a first heater 15; the tower top of the primary adsorption tower 1 is connected with the desorption tower 12 through a desorption upper pipe 16, the other end of the desorption tower 12 is connected with the tower bottom of the primary adsorption tower 1 through a desorption return pipe 17, the heat exchanger 13 is arranged in the desorption upper pipe 16, the second fan 14 is arranged in the desorption return pipe 17, a first heater 15 is arranged at the outlet end of the second fan 14, when the primary adsorption tower 1 is desorbed, the shut-off valves on the desorption upper pipe 16 and the desorption return pipe 17 are opened, so that the desorption upper pipe 16 passes through the desorption tower 12 and a desorption loop to form a closed loop, the second fan 14 is used as a power source in the loop to enable gas to circulate through the primary adsorption tower 1, and the first heater 15 is used for heating and heating the circulating gas during circulation, at the moment, the temperature of the circulating gas can be increased by 200 ℃, the gas directly enters the primary adsorption tower 1, the internal temperature of the active carbon is increased to be beneficial to cooling along with the gas entering the heat exchanger 13 during desorption, the outlet branch pipe 11 and the desorption return pipe 17 are respectively provided with a temperature sensor 25, the outlet temperature of the heat exchanger 13 is controlled to be 30-40 ℃ and then the desorption tower 12 is enabled to enter the desorption tower 1, and the primary adsorption tower 1 is cooled down after the active carbon is cooled down, and the primary adsorption tower 1 is enabled to enter the desorption tower 1, and the state is cooled down, and the primary adsorption tower 1 is enabled to enter the state, and the absorption state to be cooled, and the absorption state is cooled, and the absorption tower 1 is slowly, and the absorption stage is cooled down.

Embodiment III:

the device comprises a desorption tower 12, and is characterized by further comprising a recovery loop, wherein after adsorbed substances are transferred into the desorption tower 12, the adsorbed substances are recovered and reused through the recovery loop, and specifically, the recovery loop comprises a condenser 19, a solvent recovery tank 20, a third fan 21 and a second heater 22, the inlet end of the condenser 19 is connected with one end of the desorption tower 12 through a recovery upper pipe 23, one outlet end of the condenser 19 is connected with the other end of the desorption tower 12 through a recovery return pipe 24, the recovery return pipe 24 is provided with the third fan 21 and the second heater 22, the second heater 22 is arranged at the outlet end of the third fan 21, and the second outlet of the condenser 19 is connected with the solvent recovery tank 20; in this embodiment, the third fan 21 is used as a power source of the recovery loop to circulate the internal gas, the gas flowing out of the desorption tower 12 enters the condenser 19, the condensed gas condenses out of EAC or MEK, IPA and other substances in the mixed gas, and the condensed gas can flow into the solvent recovery tank 20 through the pipeline, and the gas circulates into the third fan 21, so that the desorption tower 12 is gradually desorbed by the circulation.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a medicine packing plastic-aluminum complex film VOC mixed gas recovery device, includes the adsorption tower, its characterized in that, the adsorption tower includes one-level adsorption tower (1) and second grade adsorption tower (2), one-level adsorption tower (1) is the series connection with second grade adsorption tower (2); the inlet end of the primary adsorption tower (1) is connected with a gas recovery main pipe, the front end of the gas recovery main pipe is provided with a wind collecting box (3), a first fan (4) is arranged on the gas recovery main pipe, the outlet end of the secondary adsorption tower (2) is connected with a discharge pipe (5), the discharge pipe (5) is provided with a circulation loop (6) through three-way connection, and the other end of the circulation loop (6) is communicated with the inlet end of the first fan (4).

2. The pharmaceutical packaging aluminum-plastic composite film VOC mixed gas recycling device according to claim 1, wherein the exhaust pipe (5) is provided with an exhaust gas detector (7) and an exhaust control valve (8).

3. The pharmaceutical packaging aluminum-plastic composite film VOC mixed gas recycling device according to claim 2, wherein a circulation control valve (9) is arranged on the three-way connected circulation loop (6).

4. A pharmaceutical packaging aluminum-plastic composite film VOC mixed gas recovery apparatus according to any one of claims 1 to 3, wherein four groups of the primary adsorption towers (1) are connected in parallel, and the four groups of the primary adsorption towers (1) perform adsorption operation in a circulating manner so that the VOC mixed gas recovery apparatus continuously processes the process gas.

5. The pharmaceutical packaging aluminum-plastic composite membrane VOC mixed gas recycling device according to claim 4, wherein the gas recycling header pipe is connected with the inlet end of each primary adsorption tower (1) through an inlet branch pipe (10), and the outlet end of each primary adsorption tower (1) is connected to the secondary adsorption tower (2) through an outlet branch pipe (11) in a gathering way.

6. The pharmaceutical packaging aluminum-plastic composite film VOC mixed gas recycling device according to claim 5 is characterized by further comprising a desorption loop for desorbing the primary adsorption tower (1), wherein the desorption loop comprises a desorption tower (12), a heat exchanger (13), a second fan (14) and a first heater (15); the tower top of the primary adsorption tower (1) is connected with a desorption tower (12) through a desorption upper pipe (16), the other end of the desorption tower (12) is connected with the tower bottom of the primary adsorption tower (1) through a desorption return pipe (17), the heat exchanger (13) is arranged on the desorption upper pipe (16), the second fan (14) is arranged on the desorption return pipe (17), and a first heater (15) is arranged at the outlet end of the second fan (14); a cold and hot water pipe (18) is wound in each primary adsorption tower (1).

7. The pharmaceutical packaging aluminum-plastic composite membrane VOC mixed gas recycling device according to claim 6, further comprising a recycling loop, wherein the recycling loop comprises a condenser (19), a solvent recycling tank (20), a third fan (21) and a second heater (22), the inlet end of the condenser (19) is connected with one end of the desorption tower (12) through a recycling upper pipe (23), one outlet end of the condenser (19) is connected with the other end of the desorption tower (12) through a recycling return pipe (24), the recycling return pipe (24) is provided with the third fan (21) and the second heater (22), the second heater (22) is arranged at the outlet end of the third fan (21), and the second outlet of the condenser (19) is connected with the solvent recycling tank (20).

8. The pharmaceutical packaging aluminum-plastic composite film VOC mixed gas recycling device according to claim 6, wherein the outlet branch pipe (11) and the desorption return pipe (17) are respectively provided with a temperature sensor (25).