CN211586026U - A catalytic oxidation purification device for exhaust gas - Google Patents

Abstract

The utility model discloses a catalytic oxidation purification device for exhaust gas, comprising: a purification box body, wherein a first filter plate and a second filter plate are arranged in the purification box. By adopting the above technical scheme, exhaust gas enters a spray chamber from an air inlet , the water distribution pipe on the spray pipe forms a water mist-like water curtain through water pressure, and the particulate pollutants in the exhaust gas are initially purified, and then filtered through the first filter plate into the photolysis chamber. The flow channel formed by the guide plate can be Reduce the flow velocity of the exhaust gas in the circulation channel after preliminary purification by the spray chamber, and cooperate with the wave-shaped UV tube body that matches the circulation channel, so that the exhaust gas in the circulation channel can be fully exposed to the same UV lamp. Under ultraviolet rays, ozone is generated, and advanced oxidation of the gas to be treated can be achieved, so that the gas to be treated has a good deodorization effect, thereby achieving the purpose of extending the time for the exhaust gas to be fully exposed to ultraviolet rays, reducing energy consumption and reducing the volume of the equipment. .

Description

A catalytic oxidation purification device for exhaust gas

technical field

The utility model relates to the field of waste gas treatment, in particular to a waste gas catalytic oxidation purification device.

Background technique

Exhaust gas is the gas discharged during industrial production, fossil fuel combustion, garbage and industrial waste combustion and automobile driving. Industrial harmful fine particles and automobile exhaust. VOC is the English abbreviation of Volatile Organic Compounds. The VOC exhaust gas generated in the industrial production process is becoming more and more complex. The direct discharge of these exhaust gases will have a greater impact on the surrounding environment. For the exhaust gas, the exhaust gas needs to be discharged through exhaust gas purification equipment.

At present, the most commonly used technical means in the prior art is to irradiate the oxygen molecules in the air with an ultraviolet light source to become ozone, and the polluting waste gas is oxidized by ozone into small molecular substances such as CO2 and H2O, and at the same time, the toxic and harmful waste gas is irradiated by an ultraviolet light beam to change the The molecular structure of exhaust gas degrades high molecular compounds into low molecular compounds, thereby purifying exhaust gas. However, because ultraviolet rays can only travel in straight lines, the radiation energy is low, and the penetrating power is weak, it can only kill directly irradiated microorganisms. In the prior art, it is usually necessary to set up multiple UV lamps to prolong the time that the exhaust gas is sufficiently exposed to ultraviolet rays. However, the equipment of this purification method is bulky and energy-intensive.

Utility model content

The technical problem to be solved by the utility model is to provide a catalytic oxidation purification device for exhaust gas, which can reduce the energy consumption and the volume of the equipment while prolonging the time that the exhaust gas is fully exposed to ultraviolet rays.

In order to solve the above-mentioned technical problems, the technical scheme of the present utility model is:

A catalytic oxidation purification device for exhaust gas, comprising: a purification box, wherein a first filter plate and a second filter plate are arranged in the purification box, and the first filter plate and the second filter plate connect the purification box The body is divided into a spray chamber, a photolysis chamber and a centrifugal air induction chamber in sequence from left to right. An air inlet is provided on one end of the purification box close to the spray chamber, and the other end of the purification box is provided with an air inlet. There is an exhaust port; the top of the spray chamber is provided with a spray pipe, the inner top wall of the spray pipe is installed with a horizontally arranged water distribution pipe, and one side of the top of the water distribution pipe is connected with a water inlet pipe; the photolysis There are several baffles on the upper and lower sides of the cavity, and the baffles are staggered at intervals to form a continuous bent circulation channel. The circulation channel is provided with a UV lamp, and the UV lamp The tube body is a wave-shaped tube body that is adapted to the circulation channel, and the two ends of the UV lamp are connected with the electronic ballast through wires; the centrifugal air induction cavity is sequentially provided with centrifugal fans from left to right. Induced fans and exhaust nets.

Preferably, a drain pipe is provided at the bottom of the spray chamber, and the drain pipe is connected to the spray pipe through a water pump.

Preferably, the first filter plate is a stainless steel metal mesh filter plate, and the second filter plate is an activated carbon filter plate.

Preferably, the exhaust net is coated with titanium dioxide for catalytic ozone decomposition.

Preferably, the deflector is made of PVC, PP or FRP material.

Preferably, the photolysis light source emitted by the UV lamp tube is an ultraviolet light source with a wavelength of 185 nm or 254 nm.

Using the above technical solution, the exhaust gas enters the spray chamber from the air inlet, and the water distribution pipe on the spray pipe forms a water mist-like water curtain through the water pressure, and the particulate pollutants in the exhaust gas are initially purified, and then pass through the first filter plate. After filtering, it enters the photolysis chamber. The circulation channel formed by the deflector can reduce the circulation speed of the exhaust gas after preliminary purification by the spray chamber in the circulation channel, and cooperate with the wave-shaped UV tube body adapted to the circulation channel to make the flow The exhaust gas in the channel can be fully exposed to the ultraviolet rays of the same UV lamp, and the ultraviolet light beam is used to decompose the oxygen molecules in the air to generate free oxygen, that is, active oxygen. Combined, ozone is generated. Because ozone has a strong oxidizing effect on organic matter, the gas to be treated can achieve advanced oxidation, thereby producing a good deodorizing effect on the gas to be treated, thus realizing the extension of the exhaust gas fully exposed to ultraviolet rays. At the same time, the purpose of reducing energy consumption and reducing equipment volume.

Description of drawings

FIG. 1 is a schematic structural diagram of a catalytic oxidation purification device for exhaust gas.

In the figure, 1-spray pipe, 2-water inlet pipe, 3-water distribution pipe, 4-air inlet, 5-purification box, 6-drain pipe, 7-water pump, 8-first filter plate, 9-UV Lamp tube, 10-deflector, 11-second filter plate, 12-exhaust port, 13-exhaust net, 14-centrifugal induced draft fan, 15-electronic ballast.

Detailed ways

The specific embodiments of the present utility model will be further described below with reference to the accompanying drawings. It should be noted here that the description of these embodiments is used to help the understanding of the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as there is no conflict with each other.

Referring to FIG. 1 , the present invention provides a catalytic oxidation purification device for exhaust gas, comprising: a purification box 5 , a first filter plate 8 and a second filter plate 11 are arranged in the purification box 5 , the first filter plate 8 and the second filter plate 8 The filter plate 11 divides the purification box 5 into a spray chamber, a photolysis chamber and a centrifugal air induction chamber from left to right. An air inlet 4 is provided on the end of the purification box 5 close to the spray chamber. The other end is provided with an exhaust port 12, the exhaust gas enters through the air inlet 4, and is extracted from the exhaust port 12 by the negative pressure of the centrifugal induced draft fan 14; A horizontally arranged water distribution pipe 3 is installed on the wall, and one side of the top of the water distribution pipe 3 is connected with a water inlet pipe 2. The nozzles on the water distribution pipe 3 form a water mist-like water curtain through water pressure, and the particulate pollutants in the exhaust gas are initially purified. The upper and lower sides of the photolysis chamber are provided with a number of guide plates 10, and the guide plates 10 are arranged at intervals to form a continuous bending circulation channel, and a UV lamp tube 9 is provided in the circulation channel, and the UV lamp tube 9 The tube body is a wave-shaped tube body that is adapted to the circulation channel. Both ends of the UV lamp tube 9 are connected with the electronic ballast 15 through wires. The flow velocity of the purified exhaust gas in the circulation channel, combined with the wave-shaped UV tube body matched with the circulation channel, makes the exhaust gas in the circulation channel fully exposed to ultraviolet rays; the centrifugal air cavity is in order from left to right There is a centrifugal induced draft fan 14 and an air exhaust network 13. The centrifugal induced draft fan 14 generates negative pressure and extracts the filtered exhaust gas; the exhaust gas enters the spray chamber from the air inlet 4, and the water distribution pipe 3 on the spray pipe 1 passes through the water. It is pressed to form a water mist-like water curtain, and the particulate pollutants in the exhaust gas are initially purified, and then filtered by the first filter plate 8 into the photolysis chamber. The flow velocity of the exhaust gas in the circulation channel is matched with the wave-shaped UV tube body adapted to the circulation channel, so that the exhaust gas in the circulation channel can be fully exposed to ultraviolet rays, and the ultraviolet light beam is used to decompose the oxygen molecules in the air to generate free radicals. Oxygen, namely active oxygen, needs to be combined with oxygen molecules due to the imbalance of positive and negative electrons carried by free oxygen, thereby generating ozone. Since ozone has a strong oxidizing effect on organic matter, advanced oxidation of the gas to be treated is achieved, so that the gas to be treated is produced. It has a good deodorizing effect. After being filtered by the second filter plate 11 , it is centrifugally extracted by the centrifugal induced draft fan 14 and extracted out of the exhaust port 12 under negative pressure.

The working principle of the utility model is as follows: the exhaust gas enters the spray chamber from the air inlet 4, and the water distribution pipe 3 on the spray pipe 1 forms a water mist-like water curtain through the water pressure, and the particulate pollutants in the exhaust gas are initially purified. After being filtered by the first filter plate 8, it enters the photolysis chamber. The circulation channel formed by the guide plate 10 can reduce the circulation speed of the exhaust gas after preliminary purification by the spray chamber in the circulation channel. The wave-shaped UV tube body makes the exhaust gas in the circulation channel fully exposed to ultraviolet rays, and uses the ultraviolet light beam to decompose the oxygen molecules in the air to generate free oxygen, that is, active oxygen. Oxygen molecules combine to generate ozone. Since ozone has a strong oxidizing effect on organic matter, the gas to be treated can achieve advanced oxidation, thereby producing a good deodorizing effect on the gas to be treated. After filtering through the second filter plate 11, centrifugal The induced draft fan 14 is centrifugally drawn out of the exhaust port 12 under negative pressure.

In this embodiment, a drain pipe 6 is provided at the bottom of the spray chamber, and the drain pipe 6 is connected to the spray pipe 1 through the water pump 7, and the water pump 7 performs circulating spraying, which saves the water of the device.

In this embodiment, the first filter plate 8 is a stainless steel metal mesh filter plate, and the second filter plate 11 is an activated carbon filter plate. The stainless steel metal mesh filter plate is resistant to corrosion and oxidation, and can capture 1-5um dust particles; The board utilizes the properties of activated carbon such as physical adsorption, chemical adsorption, oxidation, catalytic oxidation and reduction to remove impurities in the air.

In this embodiment, the exhaust net 13 is coated with titanium dioxide for catalyzing the decomposition of ozone. After the titanium dioxide is catalytically oxidized, the concentration of ozone can be reduced to avoid poisoning caused by excessive ozone concentration.

In this embodiment, the guide plate 10 is made of PVC, PP or FRP material, which has high hardness and corrosion resistance.

In this embodiment, the photolysis light source emitted by the UV lamp 9 is an ultraviolet light source with a wavelength of 185 nm or 254 nm.

The exhaust gas enters the spray chamber from the air inlet 4, and the water distribution pipe 3 on the spray pipe 1 forms a water mist-like water curtain through the water pressure, and the particulate pollutants in the exhaust gas are preliminarily purified, and then filtered through the first filter plate 8 After entering the photolysis chamber, the circulation channel formed by the deflector 10 can reduce the circulation speed of the exhaust gas after preliminary purification by the spray chamber in the circulation channel, and cooperate with the wave-shaped UV tube body adapted to the circulation channel to make the flow The exhaust gas in the channel can be fully exposed to the ultraviolet rays of the same UV lamp 9, and the ultraviolet light beam is used to decompose the oxygen molecules in the air to generate free oxygen, that is, active oxygen. Molecules combine to generate ozone. Since ozone has a strong oxidizing effect on organic matter, the gas to be treated achieves advanced oxidation, thereby producing a good deodorizing effect on the gas to be treated, thereby extending the time that the exhaust gas is fully exposed to ultraviolet rays. At the same time, the purpose of reducing energy consumption and reducing equipment volume is achieved.

The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions and alterations can be made to these embodiments, which still fall within the protection scope of the present invention.

Claims (6)

1. An exhaust gas catalytic oxidation purification apparatus, characterized by comprising: the device comprises a purification box body, wherein a first filter plate and a second filter plate are arranged in the purification box body, the first filter plate and the second filter plate divide the interior of the purification box body into a spraying cavity, a photolysis cavity and a centrifugal air inducing cavity from left to right in sequence, one end of the purification box body, which is close to the spraying cavity, is provided with an air inlet, and the other end of the purification box body is provided with an air outlet; a spray pipe is arranged at the top of the spray cavity, a water distribution pipe which is horizontally arranged is arranged on the inner top wall of the spray pipe, and a water inlet pipe is connected to one side of the top of the water distribution pipe; a plurality of guide plates are arranged on the upper side and the lower side in the photolysis cavity, the guide plates are arranged at intervals in a staggered mode to form a continuous bent flow channel, a UV lamp tube is arranged in the flow channel, the tube body of the UV lamp tube is a wave-shaped tube body matched with the flow channel, and two ends of the UV lamp tube are connected with the electronic ballast through wires; and a centrifugal draught fan and an exhaust net are sequentially arranged in the centrifugal draught fan cavity from left to right.

2. The catalytic oxidation purification apparatus for exhaust gas according to claim 1, wherein: the bottom of the spraying cavity is provided with a drain pipe, and the drain pipe is connected to the spraying pipe through a water pump.

3. The catalytic oxidation purification apparatus for exhaust gas according to claim 1, wherein: the first filter plate is a stainless steel metal mesh filter plate, and the second filter plate is an activated carbon filter plate.

4. The catalytic oxidation purification apparatus for exhaust gas according to claim 1, wherein: the exhaust net is coated with titanium dioxide for catalyzing the decomposition of ozone.

5. The catalytic oxidation purification apparatus for exhaust gas according to claim 1, wherein: the guide plate is made of PVC, PP or glass fiber reinforced plastic materials.

6. The catalytic oxidation purification apparatus for exhaust gas according to claim 1, wherein: the photolysis light source emitted by the UV lamp tube is an ultraviolet light source with the wavelength of 185nm or 254 nm.

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