Integrated active dynamic membrane VOCs waste gas purification system

Abstract

The utility model discloses an integrated active dynamic membrane VOCs (volatile organic compounds) waste gas purification system which comprises a purification tower, an active dynamic membrane liquid distribution plate is fixedly mounted above the inside of an inner purification chamber, a plurality of uniformly distributed atomizing heads are fixedly mounted on the lower surface of the active dynamic membrane liquid distribution plate, a liquid inlet is formed in one side of the active dynamic membrane liquid distribution plate, and a liquid outlet is formed in the other side of the active dynamic membrane liquid distribution plate. A primary filter plate is arranged below the active dynamic membrane liquid distribution plate and is fixedly mounted in the purification tower through a filter plate mounting piece, a waste gas inlet is fixedly formed in the position, located on the outer wall of the purification tower, between the active dynamic membrane liquid distribution plate and the primary filter plate, and a medium-efficiency filter plate is fixedly mounted on the lower surface of the primary filter plate; according to the active dynamic membrane VOCs waste gas purification system disclosed by the utility model, an existing spraying system and an existing recovery system are integrated in independent equipment, so that the occupied area and the manufacturing cost of the equipment can be effectively reduced, and purification of VOCs and recovery of active agents are integrally designed.

Description

Technical Field

[0001] The utility model relates to the technical field of VOCs waste gas purification, in particular to an integrated active dynamic membrane VOCs waste gas purification system. Background Art

[0002] Volatile organic compounds (VOCs) usually refer to various organic compounds with a boiling point below 260°C at room temperature, mainly composed of alkanes, aromatic hydrocarbons, olefins, halogenated hydrocarbons, esters, aldehydes, ketones and other organic compounds. There are usually a large number of VOCs in production workshops such as paint production, automobile painting, and organic synthesis. Most volatile organic compounds (VOCs) are harmful to the human body, and some are carcinogenic, such as polycyclic aromatic hydrocarbons and nitrosamines. Some are carcinogenic, such as halogenated hydrocarbons, aromatic amines, etc. Volatile organic compounds (VOCs) are one of the main factors of ambient air and indoor air pollution, so the treatment of VOCs is a necessary choice for protecting the environment;

[0003] The existing dynamic membrane purification system promotes the formation of tiny droplets of aqueous solution containing active agents through the kinetic energy of the exhaust gas, that is, forms an active dynamic membrane, promotes gas-liquid mass transfer, and thus improves the removal efficiency of VOCs. In specific implementation, its spray absorption VOC system is usually a combination of a spray absorption device and a packing adsorption device, which leads to a large footprint and high preparation cost. Therefore, the utility model proposes an integrated active dynamic membrane VOCs exhaust gas purification system. Utility Model Content

[0004] The purpose of the utility model is to provide an integrated active dynamic membrane VOCs waste gas purification system to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an integrated active dynamic membrane VOCs waste gas purification system, comprising a purification tower and an inner purification chamber arranged inside the purification tower, an active dynamic membrane liquid distribution plate is fixedly installed on the upper part of the inner purification chamber, a liquid distribution channel is arranged inside the active dynamic membrane liquid distribution plate, a plurality of evenly distributed atomizing heads are fixedly installed on the lower surface of the active dynamic membrane liquid distribution plate, a liquid inlet is arranged on one side of the active dynamic membrane liquid distribution plate, a primary filter plate is arranged below the active dynamic membrane liquid distribution plate, the primary filter plate is fixedly installed inside the purification tower through a filter plate mounting piece, an exhaust gas inlet is fixedly installed between the active dynamic membrane liquid distribution plate and the primary filter plate and on the outer wall of the purification tower, a medium-efficiency filter plate is fixedly installed on the lower surface of the primary filter plate, and a filling adsorption area is arranged below the medium-efficiency filter plate.

[0006] Preferably, the filling adsorption zone is an activated carbon adsorption material.

[0007] Preferably, a circulating liquid tank is provided below the filling adsorption area, and one side of the circulating liquid tank is fixedly connected to an input port of a circulating pump through a pipeline.

[0008] Preferably, the output port of the circulation pump is fixedly connected to a primary pipe via a flange, and the tail end of the primary pipe is fixedly connected to a three-way valve.

[0009] Preferably, a liquid inlet pipe is fixedly connected above the three-way valve, the top of the liquid inlet pipe is fixedly connected to the liquid inlet of the active dynamic membrane liquid distribution plate, and a waste liquid pipe is fixedly connected to the side of the three-way valve.

[0010] Preferably, a switch valve is fixedly installed on the liquid inlet pipe.

[0011] Preferably, the bottom end of the waste liquid pipe is fixedly connected to a waste liquid tank.

[0012] Preferably, a purification outlet is fixedly installed below the filling adsorption area and on the outer wall of the purification tower.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The active dynamic membrane VOCs waste gas purification system of the utility model integrates the existing spray system and recovery system in a single device, thereby effectively reducing the equipment's footprint and manufacturing cost, and realizes an integrated design for VOCs purification and active agent recovery, and further improves the VOCs removal efficiency, treats waste gas under mild conditions, has a high safety factor, and has a wide range of uses. The equipment also has a simple structure and is easy to maintain. It consumes little process energy for treating VOCs waste gas and has good performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of an embodiment of the utility model;

[0016] Figure 2 For the utility model embodiment Figure 1 A schematic diagram of the enlarged structure of area A;

[0017] Figure 3 This is a schematic diagram of the structure of the active dynamic membrane liquid distribution plate of an embodiment of the utility model.

[0018] In the figure: 1. Purification tower; 2. Internal purification chamber; 3. Active dynamic membrane liquid distribution plate; 4. Atomizing head; 5. Liquid inlet; 6. Filter plate mounting; 7. Primary filter plate; 8. Waste gas inlet; 9. Medium efficiency filter plate; 10. Filling adsorption area; 11. Purification outlet; 12. Circulating liquid tank; 13. Circulating pump; 14. Primary pipe; 15. Three-way valve; 16. Liquid inlet pipe; 17. Switch valve; 18. Waste liquid pipe; 19. Waste liquid tank. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-3 The utility model provides an embodiment: an integrated active dynamic membrane VOCs waste gas purification system, comprising a purification tower 1 and an inner purification chamber 2 arranged inside the purification tower 1, wherein an active dynamic membrane liquid distribution plate 3 is fixedly installed above the inner purification chamber 2;

[0023] The active dynamic membrane liquid distribution plate 3 is a common liquid distribution plate body, and a liquid distribution channel is arranged inside the active dynamic membrane liquid distribution plate 3;

[0024] A plurality of evenly distributed atomizing heads 4 are fixedly mounted on the lower surface of the active dynamic membrane liquid distribution plate 3, and a liquid inlet 5 is provided on one side of the active dynamic membrane liquid distribution plate 3;

[0025] The active dynamic membrane is a thin film of active agent wrapped around the impurities, and the active agent is sprayed out through the atomizing head 4, so that the active agent is wrapped around the impurities in the exhaust gas to form an active dynamic membrane.

[0026] A primary filter plate 7 is provided below the active dynamic membrane liquid distribution plate 3, and the VOCs waste gas to which the active dynamic membrane is attached can be primarily purified by the primary filter plate 7, so that large impurities in the waste gas can be filtered out. The primary filter plate 7 is fixedly installed inside the purification tower 1 through a filter plate mounting member 6, and an exhaust gas inlet 8 is fixedly installed between the active dynamic membrane liquid distribution plate 3 and the primary filter plate 7 and on the outer wall of the purification tower 1, and VOCs waste gas can be injected through the exhaust gas inlet. A medium-efficiency filter plate 9 is fixedly installed on the lower surface of the primary filter plate 7, and the impurities wrapped with the active dynamic membrane can be secondary filtered by the medium-efficiency filter plate 9, and a filling adsorption area 10 is provided below the medium-efficiency filter plate 9;

[0027] The adsorption area 10 is filled with activated carbon adsorption material, so that impurities can be easily adsorbed.

[0028] In this embodiment, a circulating liquid tank 12 is arranged below the filling adsorption area 10, and one side of the circulating liquid tank 12 is fixedly connected to the input port of the circulating pump 13 through a pipeline. The impurities after adsorption will stay in the filling adsorption area, wherein the active dynamic membrane wrapped thereon will fall with gravity, undergo certain liquid filtration through the filling adsorption area 10, and finally fall into the circulating liquid tank 12 for recycling.

[0029] Furthermore, the output port of the circulation pump 13 is fixedly connected to a primary pipe 14 via a flange, and a three-way valve 15 is fixedly connected to the tail end of the primary pipe 14 .

[0030] Furthermore, a liquid inlet pipe 16 is fixedly connected above the three-way valve 15, the top of the liquid inlet pipe 16 is fixedly connected to the liquid inlet 5 of the active dynamic membrane liquid distribution plate 3, and a waste liquid pipe 18 is fixedly connected to the side of the three-way valve 15;

[0031] In order to facilitate opening and closing of the liquid inlet pipe 16 and to facilitate recycling of waste liquid, a switch valve 17 is fixedly installed on the liquid inlet pipe 16, and a waste liquid tank 19 is fixedly connected to the bottom end of the waste liquid pipe 18.

[0032] In this embodiment, in order to discharge the purified waste gas, a purification outlet 11 is fixedly installed below the filling adsorption area 10 and on the outer wall of the purification tower 1, and the purified waste gas can be discharged through the provided purification outlet 11.

[0033] Working principle: Before use, the purification tower 1 can be opened, the filled adsorption area 10 can be fully soaked with active agents, and active agents can be injected into the circulating liquid tank 12 for subsequent use;

[0034] When it is necessary to purify the VOCs waste gas, the VOCs waste gas can be injected into the purification tower 1 through the waste gas inlet 8. By arranging a primary filter plate 7 inside the purification tower 1, the large impurities in the waste gas that are not wrapped by the active dynamic membrane can be filtered through the primary filter plate 7, so that the medium and large impurities in the VOCs waste gas can be filtered out through the use of the primary filter plate 7;

[0035] After the large impurities in the VOCs waste gas are filtered, the circulation pump 13 and the atomizing head 4 start working. The circulation pump 13 transports the active agent in the circulation liquid tank 12 to the active dynamic membrane liquid distribution plate 3, and sprays it out through the atomizing head 4 of the active dynamic membrane liquid distribution plate 3. The atomized active agent will wrap around the small impurities in the waste gas, thereby forming a wrapped active dynamic membrane on the outside, so that the impurities fall in the form of droplets. The falling droplet impurities are partially filtered through the medium-efficiency filter plate 9, thereby completing the secondary filtering effect;

[0036] The fine particle impurities attached to the dynamic membrane will enter the filling adsorption area 10 through the medium-efficiency filter plate 9, and finally be adsorbed by the filling adsorption area 10. The filling adsorption area 10 can absorb most of the tiny particle droplets, and can effectively recover the residual tiny droplets, and can also elute and recover the active agent absorbed in the filling adsorption area 10, so as to achieve effective recycling of the active agent;

[0037] The active agent recovered by elution finally drips into the circulating liquid tank 12, and is transported to the active dynamic membrane liquid distribution plate 3 again through the circulating pump 13, thereby completing the recycling effect of the cycle;

[0038] Finally, the purified gas is discharged through the purification outlet 11, thereby achieving the active dynamic purification effect on the VOCs waste gas;

[0039] By arranging a switch valve 17 on the liquid inlet pipe 16, the liquid inlet work can be opened and closed by the switch valve 17. When the switch valve 17 is closed, the circulation pump 13 can input the active agent into the waste liquid tank 19 through the waste liquid pipe 18. This structural design can facilitate the removal of the active agent after the active agent is used for a long time, facilitate timely replacement, effectively improve the purification quality, have a good maintenance effect, and are easy to maintain.

[0040] The active dynamic membrane VOCs waste gas purification system of the utility model integrates the existing spray system and recovery system in a single device, thereby effectively reducing the equipment's footprint and manufacturing cost, and realizes an integrated design for VOCs purification and active agent recovery, and further improves the VOCs removal efficiency, treats waste gas under mild conditions, has a high safety factor, and has a wide range of uses. The equipment also has a simple structure and is easy to maintain. It consumes little process energy for treating VOCs waste gas and has good performance.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An integrated active dynamic membrane VOCs waste gas purification system, comprising a purification tower (1) and an inner purification chamber (2) arranged inside the purification tower (1), characterized in that: An active dynamic membrane liquid distribution plate (3) is fixedly installed on the upper part of the inner purification chamber (2), and a liquid distribution channel is arranged inside the active dynamic membrane liquid distribution plate (3). A plurality of evenly distributed atomizing heads (4) are fixedly installed on the lower surface of the active dynamic membrane liquid distribution plate (3). A liquid inlet (5) is arranged on one side of the active dynamic membrane liquid distribution plate (3). A primary filter plate (7) is arranged below the active dynamic membrane liquid distribution plate (3). The primary filter plate (7) is fixedly installed inside the purification tower (1) through a filter plate mounting member (6). An exhaust gas inlet (8) is fixedly installed between the active dynamic membrane liquid distribution plate (3) and the primary filter plate (7) and on the outer wall of the purification tower (1). A medium-efficiency filter plate (9) is fixedly installed on the lower surface of the primary filter plate (7), and a filling adsorption area (10) is arranged below the medium-efficiency filter plate (9).

2. The integrated active dynamic membrane VOCs waste gas purification system according to claim 1 is characterized by: The filling adsorption area (10) is an activated carbon adsorption material.

3. The integrated active dynamic membrane VOCs waste gas purification system according to claim 1 is characterized by: A circulating liquid tank (12) is provided below the filling adsorption area (10), and one side of the circulating liquid tank (12) is fixedly connected to an input port of a circulating pump (13) via a pipeline.

4. The integrated active dynamic membrane VOCs waste gas purification system according to claim 3 is characterized by: The output port of the circulation pump (13) is fixedly connected to a primary pipe (14) via a flange, and the tail end of the primary pipe (14) is fixedly connected to a three-way valve (15).

5. The integrated active dynamic membrane VOCs waste gas purification system according to claim 4 is characterized by: A liquid inlet pipe (16) is fixedly connected above the three-way valve (15), the top end of the liquid inlet pipe (16) is fixedly connected to the liquid inlet (5) of the active dynamic membrane liquid distribution plate (3), and a waste liquid pipe (18) is fixedly connected to the side of the three-way valve (15).

6. The integrated active dynamic membrane VOCs waste gas purification system according to claim 5 is characterized by: A switch valve (17) is fixedly mounted on the liquid inlet pipe (16).

7. The integrated active dynamic membrane VOCs waste gas purification system according to claim 5 is characterized by: The bottom end of the waste liquid pipe (18) is fixedly connected to a waste liquid tank (19).

8. The integrated active dynamic membrane VOCs waste gas purification system according to claim 1 is characterized by: A purification outlet (11) is fixedly installed below the filling adsorption area (10) and on the outer wall of the purification tower (1).

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