CN212819149U - Catalytic oxidation tower for VOC tail gas treatment process - Google Patents

Abstract

The utility model discloses a VOC tail gas catalytic oxidation tower for processing technology relates to the relevant technical field of tail gas treatment, and it includes the catalytic oxidation tower body, the tail gas entry has been seted up at the bottom middle part of catalytic oxidation tower body, the tail gas export has been seted up at the top middle part of catalytic oxidation tower body. Through setting up the catalyst fixed bed two-layerly or the multilayer, every layer bottom sets up the ozone cloth tuber pipe, the cloth tuber pipe is the multiturn heliciform, the ozone venthole is down, flow opposite direction with tail gas, in order to do benefit to the mixture of ozone and tail gas, the catalyst fixed bed has several components in satisfying ozone and tail gas outside the surperficial fast reaction, still impel ozone and tail gas intensive mixing's effect, the multistage ladder that is provided with of ozone cloth tuber pipe supplements ozone concentration, compensate the effect that causes ozone concentration to reduce because of ozonolysis, the reaction time of organic matter and ozone in the extension tail gas simultaneously, satisfy the requirement of treatment effect.

Description

Catalytic oxidation tower for VOC tail gas treatment process

Technical Field

The utility model relates to a tail gas treatment correlation technique field, in particular to VOC tail gas catalytic oxidation tower for processing technology.

Background

The continuous growth of the global population promotes the rapid development of the growing industry, the breeding industry and the planting industry, the atmospheric environment of population gathering areas deteriorates rapidly, in order to improve the atmospheric environment, various countries have issued policies to limit the emission of organic gases such as VOC and odor gases, and in the environmental protection industry, the purification of organic gases containing VOC is a great and important branch.

In the process of high-speed development of economy in China for decades, environmental protection technology is concerned and continuously developed in recent years, but the organic tail gas treatment technology is still the traditional technology of chemical washing, plant extract shielding, activated carbon adsorption and the like, and although the technology is applied by the technologies of runner concentration, incineration, ultraviolet light catalytic oxidation and the like, the technology is not satisfactory on the whole, not good in treatment effect, or generates secondary pollutants in the treatment process, and some secondary pollutants are more difficult to treat. Actually, gases with peculiar smells such as VOC, stink and the like are all organic gases, the essence of the treatment of the tail gas is that the pollutants are decomposed to remove pollution, and the pollutants which are as little as possible are discharged to the environment, and other pollutants which need to be treated are not generated, or other pollutants which need to be treated are generated as little as possible, or the generated pollution area is easily subjected to harmless treatment at low cost.

Therefore, it is necessary to provide a catalytic oxidation tower for VOC tail gas treatment process to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The not enough to prior art, the utility model provides a VOC tail gas catalytic oxidation tower for processing technology has solved the problem that proposes in the above-mentioned background art.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a catalytic oxidation tower for a VOC tail gas treatment process comprises the following steps:

the method comprises the following steps: collecting waste gas: collecting VOC and malodorous gases by using a professional exhaust gas collecting device;

step two: dust fall and dehumidification: waste gas passes through the gas collecting pipe on the waste gas collection device and gets into the spray room, and the spray room is inside the spray room through the shower head to even spraying of water by a water pump, and the shower head sprinkles solution and drenches waste gas, lets waste gas and water fully react, and the material of easy soluble water can be adsorbed by water is whole to be purified like this, makes the process of a dust fall of waste gas realization. And the dusted gas is subjected to cooling and dehumidifying treatment on the waste gas by adopting a three-dimensional pipe heater and a three-dimensional pipe dehumidifier, the shell side of the three-dimensional pipe dehumidifier is the waste gas, the pipe side is outdoor air, the shell side of the three-dimensional pipe heater is the dehumidified waste gas, and the pipe side is the waste gas before dehumidification.

Step four: multi-stage ozone catalytic oxidation: the waste gas after dehumidification and dust fall enters a catalytic oxidation tower, and the tower body structure meets the requirements of full mixing of ozone and tail gas, full contact of mixed gas and a catalyst and sufficient catalytic oxidation time;

step five: discharging after reaching the standard: and the waste gas processed by the catalytic oxidation tower is discharged into the atmosphere through a tail gas discharge port.

Optionally, in the first step, the exhaust gas enters a gas collecting pipe on the exhaust gas collecting device under the conditions that the flow speed is lower than 10 m/s and the temperature is normal temperature;

optionally, the three-dimensional pipe heater and the three-dimensional pipe dehumidifier in the second step are respectively and fixedly connected with a temperature sensor and a humidity sensor.

Optionally, the water spraying amount of the water pump in the second step is more than 2000kg/h, and the water spraying temperature is normal temperature.

Optionally, the catalytic oxidation tower in the fourth step comprises a catalytic oxidation tower body, a tail gas inlet is formed in the middle of the bottom end of the catalytic oxidation tower body, and a tail gas outlet is formed in the middle of the top end of the catalytic oxidation tower body.

Optionally, the bottom of the inner cavity of the catalytic oxidation tower body is fixedly connected with a first ozone air distribution pipe;

and a first tray is fixedly arranged above the first ozone distributing pipe.

Optionally, the upper surface of the first tray is fixedly connected with a first catalyst;

and the top of the inner cavity of the catalytic oxidation tower body is fixedly connected with a second ozone air distribution pipe.

Optionally, a second tray is fixedly mounted above the second ozone distributing pipe;

and the upper surface of the second tray is fixedly connected with a second catalyst.

Optionally, both sides of the bottom end of the catalytic oxidation tower body are fixedly connected with supporting legs;

and one side of the supporting leg is fixedly connected with a reinforcing rib.

Optionally, the catalytic oxidation tower body comprises an inner tank and an outer tank;

and a stainless steel square tube is fixedly connected between the inner tank and the outer tank.

(III) advantageous effects

The utility model provides a VOC tail gas catalytic oxidation tower for processing technology possesses following beneficial effect:

(1) the utility model discloses from organic tail gas's such as VOC characteristic and treatment technical essence start, a simple process is designed for the core to the high-efficient ozone catalyst of fixed bed, the equipment investment is few, high efficiency, the treatment cost is low, do not produce secondary pollutant's organic gas and handle new technology and equipment system, remove dust through the organic gas to the collection, dehumidification and cooling process, can protect ozone catalyst's catalytic effect and life, in order to satisfy the sufficient requirement of mist with catalyst fully contact and catalytic oxidation time, catalytic oxidation tower often sets up two-stage or multistage.

(2) The utility model discloses a set up two-layer or multilayer with the catalyst fixed bed, every layer of bottom sets up ozone cloth tuber pipe, the cloth tuber pipe is the multiturn heliciform, the ozone venthole is down, flow opposite direction with tail gas, in order to do benefit to the mixture of ozone and tail gas, the catalyst fixed bed has several components to react outside surperficial quick reaction except satisfying ozone and tail gas, still impel ozone and tail gas intensive mixing's effect, the multistage ladder that is provided with of ozone cloth tuber pipe supplements ozone concentration, compensate the effect that causes ozone concentration to reduce because of ozonolysis, organic matter and ozone's reaction time in the extension tail gas simultaneously, satisfy the requirement of treatment effect.

Drawings

Fig. 1 is a schematic view of the process flow of the present invention.

Fig. 2 is a schematic view of the structure of the present invention.

Fig. 3 is a schematic top sectional view of the catalytic oxidation tower body structure of the present invention.

In the figure: 1. a catalytic oxidation tower body; 2. a tail gas inlet; 3. a tail gas outlet; 4. a first ozone air distribution pipe; 5. a first tray; 6. a first catalyst; 7. a second ozone air distribution pipe; 8. a second tray; 9. a second catalyst; 10. supporting legs; 11. reinforcing ribs; 12. an inner tank; 13. an outer tank; 14. stainless steel square tubes; 15. a heat-insulating sponge.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The utility model provides a VOC tail gas treatment process as shown in figure 1, which comprises the following steps:

the method comprises the following steps: collecting waste gas: VOC and malodorous gas are collected by using a professional waste gas collecting device, and the waste gas enters a gas collecting pipe on the waste gas collecting device under the conditions that the flow rate is lower than 10 m/s and the temperature is normal temperature;

step two: dehumidification and dust fall: the waste gas is cooled and dehumidified by adopting a three-dimensional pipe heater and a three-dimensional pipe dehumidifier, the shell side of the three-dimensional pipe dehumidifier is waste gas, the pipe side of the three-dimensional pipe dehumidifier is outdoor air, the shell side of the three-dimensional pipe heater is dehumidified waste gas, the pipe side of the three-dimensional pipe dehumidifier is waste gas before dehumidification, then the waste gas enters a spray room through a gas collecting pipe on a waste gas collecting device, the spray room is formed by uniformly spraying water into the spray room through a water pump through a spray head, the spray head sprays solution to humidify the waste gas, the waste gas and the water are fully reacted, substances which are easy to dissolve in the water can be completely adsorbed and purified by the water, the waste gas is subjected to a dust fall process, the three-dimensional pipe heater and the three-dimensional pipe dehumidifier are respectively and fixedly connected with a temperature sensor and a humidity sensor, the;

step four: multi-stage ozone catalytic oxidation: the waste gas after dehumidification and dust fall enters a catalytic oxidation tower, and the tower body structure meets the requirements of full mixing of ozone and tail gas, full contact of mixed gas and a catalyst and sufficient catalytic oxidation time;

step five: discharging after reaching the standard: and the waste gas processed by the catalytic oxidation tower is discharged into the atmosphere through a tail gas discharge port.

The utility model discloses set out from organic tail gas's such as VOC characteristic and treatment technical essence, a simple process is designed as the core to the high-efficient ozone catalyst of fixed bed, the equipment investment is few, high efficiency, the treatment cost is low, do not produce secondary pollutant's organic gas and handle new technology and equipment system, remove dust through the organic gas to the collection, dehumidification and cooling are handled, can protect ozone catalyst's catalytic effect and life, in order to satisfy the sufficient requirement of mist with catalyst fully contact and catalytic oxidation time, catalytic oxidation tower often sets up two-stage or multistage.

The utility model provides a catalytic oxidation tower as shown in figure 2-3, which comprises a catalytic oxidation tower body 1, a tail gas inlet 2 is arranged at the middle part of the bottom end of the catalytic oxidation tower body 1, a tail gas outlet 3 is arranged at the middle part of the top end of the catalytic oxidation tower body 1, a first ozone air distributing pipe 4 is fixedly connected with the bottom of an inner cavity of the catalytic oxidation tower body 1, a first tray 5 is fixedly arranged above the first ozone air distributing pipe 4, a first catalyst 6 is fixedly connected with the upper surface of the first tray 5, a second ozone air distributing pipe 7 is fixedly connected with the top of the inner cavity of the catalytic oxidation tower body 1, a second tray 8 is fixedly arranged above the second ozone air distributing pipe 7, a second catalyst 9 is fixedly connected with the upper surface of the second tray 8, supporting legs 10 are fixedly connected with both sides of the bottom end of the catalytic oxidation tower body 1, and a reinforcing rib 11 is fixedly connected with one, the catalytic oxidation tower body 1 comprises an inner tank 12 and an outer tank 13, a stainless steel square tube 14 is fixedly connected between the inner tank 12 and the outer tank 13, a catalyst fixed bed is provided with two or more layers, an ozone distributing pipe is arranged at the bottom of each layer and is in a multi-circle spiral shape, ozone outlet holes face downwards and are opposite to the flowing direction of tail gas, so that the mixing of ozone and the tail gas is facilitated, the catalyst fixed bed has the function of promoting the ozone and the tail gas to be fully mixed besides meeting the surface rapid reaction of a plurality of components in the ozone and the tail gas, the ozone distributing pipe is provided with steps for supplementing the ozone concentration, the function of reducing the ozone concentration caused by ozone decomposition is compensated, the reaction time of organic matters in the tail gas and the ozone is prolonged, the requirement of treatment effect is met, a heat-preserving sponge 15 is fixedly connected between the inner tank 12 and the outer tank 13, and the heat loss in the tower, guaranteed the treatment effeciency in whole exhaust-gas treatment process, through inner tank 12, when the tower body fracture and gap appear, the seepage appears in the inside organic matter waste gas of tower body that can effectually prevent, causes the pollution to the atmosphere.

It is noted that in the present disclosure, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (3)

1. The utility model provides a VOC is catalytic oxidation tower for tail gas treatment process which characterized in that: it includes catalytic oxidation tower body (1), tail gas entry (2) have been seted up at the bottom middle part of catalytic oxidation tower body (1), tail gas export (3) have been seted up at the top middle part of catalytic oxidation tower body (1), the first ozone cloth tuber pipe of inner chamber bottom fixedly connected with (4) of catalytic oxidation tower body (1), the top fixed mounting of first ozone cloth tuber pipe (4) has first tray (5), the last fixed surface of first tray (5) is connected with first catalyst (6), the inner chamber top fixedly connected with second ozone cloth tuber pipe (7) of catalytic oxidation tower body (1), the top fixed mounting of second ozone cloth tuber pipe (7) has second tray (8), the last fixed surface of second tray (8) is connected with second catalyst (9).

2. The catalytic oxidation tower for the VOC tail gas treatment process according to claim 1, characterized in that:

both sides of the bottom end of the catalytic oxidation tower body (1) are fixedly connected with supporting legs (10);

one side of the supporting leg (10) is fixedly connected with a reinforcing rib (11).

3. The catalytic oxidation tower for the VOC tail gas treatment process according to claim 1, characterized in that:

the catalytic oxidation tower body (1) comprises an inner tank (12) and an outer tank (13);

and a stainless steel square pipe (14) is fixedly connected between the inner tank (12) and the outer tank (13).

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