CN207562678U - A kind of photocatalysis aqueous vapor treating column - Google Patents

Abstract

The utility model relates to a photocatalytic water gas treatment tower, comprising a water tank, a reaction body, an adsorption device, a circulating water device, and a gas delivery device. The water gas treatment tower adopts a photocatalytic advanced oxidation method, which can convert various organic Pollutants are oxidized and decomposed into carbon dioxide and water. The UV lamp is built into the water tank for photocatalytic reaction. The circulating water device uses a corrosion-resistant water pump as the power. The gas delivery device uses a fan to blow the collected waste gas into the bottom of the reaction tower. The power of the water pump and the fan must match. .

Description

A photocatalytic water gas treatment tower

technical field

The utility model relates to a photocatalytic water gas treatment tower, which belongs to the field of thermochemical conversion of biomass and the field of environmental engineering. It is used for waste gas treatment of complex components, has the ability to efficiently process waste gas of complex components, and the gas after treatment can reach the standard discharge. .

Background technique

Air pollution is one of the most prominent environmental problems in my country at present. Among them, industrial waste gas is an important source of air pollutants. The most difficult to deal with in industrial waste gas is organic waste gas, which mainly includes various hydrocarbons, alcohols, aldehydes, acids, ketones and amines. They mainly come from the waste gas discharged during the production process of the petroleum and chemical industries. They are characterized by large quantities, large fluctuations in organic matter content, flammability, certain toxicity, and some have stench, and the emission of chlorofluorocarbons can also cause ozone layer damage. destroy. After organic waste gas enters the human body through the respiratory tract and skin, it can cause temporary and permanent damage to human respiratory, blood, liver and other systems and organs, especially polycyclic aromatic hydrocarbons can directly cause cancer in the human body. In addition to causing direct air pollution, these organic waste gases will also generate secondary pollutants through a series of complex reactions under the action of sunlight, becoming one of the main sources of PM2.5. Therefore, the treatment and purification of organic waste gas is imperative.

At present, the above-mentioned organic waste gas purification treatment methods mainly include: 1) direct high-temperature combustion method; 2) catalytic oxidation method; 3) ozone deodorization method; 4) activated carbon adsorption method; 5) acid-base liquid spray method; 6) Biological deodorization method, etc. These methods have problems such as high equipment investment, high operating cost, small processing gas volume, unstable work, large space occupation, low deodorization and purification efficiency, potential safety hazards, and secondary pollution to varying degrees.

The invention is to perform Fenton oxidation on the organic matter in the water-gas mixture under the condition of ultraviolet photocatalysis, thereby realizing the treatment of waste water and waste gas. The invented device is a water-gas mixing tower with ultraviolet photocatalysis. At present, there are many types of equipment that can be used to treat waste gas or wastewater, but there are few integrated water and gas treatment devices. For example, the absorption and adsorption treatment method developed by Yin Yedong of Beijing Wanxin Tonghe Energy Technology Co., Ltd., which contains high-concentration benzene gas, and the device for the treatment of waste gas developed by Beijing Wotaisi Environmental Protection Technology Development Co., Ltd. by combining absorption, adsorption and biological methods. The absorption and adsorption treatment method of high-concentration benzene gas is to absorb high-concentration benzene gas, condense the absorbed gas, recycle the condensate and condensed gas, and discharge the absorbed gas after being adsorbed by activated carbon. It is only suitable for the treatment of gases containing a single component, but not for exhaust gases with complex components. Another widely used device for absorbing and treating waste gas is that the waste gas passes through a spray tower or a bubble tower, and the waste gas is dissolved in water to achieve the purpose of treating waste gas. This treatment method is only suitable for those inorganic pollutant gases that are easily soluble in water, such as S02. Therefore, there is currently a lack of effective treatment equipment for complex pollutant gases. In response to the above problems, we designed a water-gas reaction tower. The inorganic pollutants that are easily soluble in water can be removed by absorption, and the organic pollutants that are not easily soluble in water are oxidized and removed by Fenton advanced oxidation technology, so as to achieve exhaust gas purification. the goal of. The water gas treatment device provided by the invention is similar in shape to the bubble tower, but the internal structure and waste gas treatment principle are fundamentally different. The treatment device includes a water tank, a reaction body, a circulating water device, a gas delivery device, and an adsorption device.

Contents of the invention

The purpose of the utility model is to provide a system capable of effectively treating complex polluted gases or co-processing of water and gas.

To achieve the above object, the technical solution of the present invention is:

A photocatalytic water gas treatment tower is provided, which includes a water tank, a reaction body, an adsorption device, a circulating water device, and a gas delivery device, and is characterized in that the water gas treatment tower adopts a photocatalytic advanced oxidation method, which can convert various components into Complex organic pollutants are oxidized and decomposed into carbon dioxide and water. The water tank has a built-in ultraviolet lamp for photocatalytic reaction. The required oxidizing reagent is added dropwise into the water tank using a separatory funnel. Concentration, the reaction body has several layers of water distribution boards, a large space is left on one side of the water distribution boards, as a gas passage, and there is a water retaining board about 5em high on the edge, under the action of the water retaining board, a A layer of water layer, which is used to catalyze the decomposition of organic matter absorbed in water. There are holes evenly distributed on the surface of the water distribution plate, with a diameter of about 2 mm. Under the action of water pressure and air pressure, water is sprayed to the bottom through the holes of the water distribution plate. One layer, so that a spray layer is formed between the two layers of water distribution boards, the gas is mixed with the water mist in the spray layer, and the catalytic oxidation reaction and absorption process are carried out under the irradiation of ultraviolet lamps. The circulating water device uses a corrosion-resistant water pump as the Power, the water is pumped from the water tank to the top of the reaction tower through the corrosion-resistant pipeline, and sprayed into the reaction body by the spraying device on the top of the tower. The gas delivery device uses a fan to blow the collected waste gas into the bottom of the reaction tower. The power of the water pump and the fan need to match.

An ultraviolet lamp is built between every two layers of water distribution plates in the reaction body, and the ultraviolet lamp is protected by a quartz sleeve, and the ultraviolet lamp provides the light source required for catalytic oxidation.

The reaction body is provided with a demister, and water vapor condenses and drops on the demister.

The adsorption device is a partition box with built-in activated carbon. The cover on the top of the box can be opened to facilitate the loading and unloading of activated carbon. One side is the air inlet and the other side is the air outlet. The air outlet is provided with a tee.

The beneficial effects of the utility model are:

Exhaust gas treatment adopts ultraviolet photocatalytic Fenton advanced oxidation method, which has strong oxidation ability, fast reaction speed and thorough oxidation decomposition; the reaction is carried out in the spray layer and water layer in the reactor, and the water mist in the spray layer is mixed with the polluted gas at the same time Oxidation and absorption are realized, and the absorbed organic matter is further oxidized and decomposed into carbon dioxide and water in the water layer of the tray, so as to effectively treat the exhaust gas with complex components; Compared with the bubble tower, the water-gas mixing does not adopt the form of bubbling, so the gas flow resistance is small during the treatment process, which can effectively reduce the fan load; another important difference from the bubble tower is that the liquid is directly sprayed from the water distribution plate to the next layer, forming a spray tower. Water mist space, the beneficial effect of this spray space is to complete the reaction and absorption process of polluted gas, while the bubble tower does not have this spray space; the device can also be used for comprehensive treatment of waste water and waste gas; the water tank is also equipped with ultraviolet Light, to further strengthen the effect of removing organic pollutants; use water pressure and air pressure to make the water distribution plate have a good spraying effect.

Description of drawings

Fig. 1 Flow chart of photocatalytic water gas treatment.

Among them: 1. Water tank, 2. Circulating water pump, 3. Spray head, 4. Water distribution board, 5. Fan, 6. Ultraviolet lamp, 7. Demister, 8. Activated carbon adsorption device.

Detailed ways

Below in conjunction with accompanying drawing, the utility model and embodiment are further described to the present invention:

As shown in Figure 1: the water is sprayed by the circulating water pump 2 to the spray head 3 on the upper part of the reaction tower, sprayed onto the water distribution plate 4 to form a water layer about 2 cm thick, and then passes through the small holes on the water distribution plate Spray to the next water distribution board, and form a water layer about 2cm thick, so spray to the bottom layer step by step, and flow back to the water tank 1.

The exhaust gas is sent from the bottom side of the reaction tower through the fan 5, and after mixing with the spray layer between the upper and lower trays, it enters the upper spray layer from the gap of the water distribution plate on the other side of the reaction tower to complete the water vapor After mixing, enter the upper layer from the gap of the water distribution plate. After the gas-water mixing is completed step by step, the water mist is removed by the mist eliminator 7, and the purified gas is adsorbed by the activated carbon adsorption device 8 and then discharged up to the standard.

There are several ultraviolet lamps 6 built in the reaction tower, which are distributed between the upper and lower water distribution plates. The ultraviolet light catalyzes the hydrogen peroxide in the spray layer and the water layer to form hydroxyl radicals, and uses the strong oxidation of hydroxyl radicals to complete the oxidative decomposition of organic matter. ;In order to strengthen the treatment effect, an ultraviolet lamp is also placed in the water tank, and the organic matter that has not been oxidized in the reaction tower is further decomposed and oxidized in the water tank; hydrogen peroxide is added dropwise into the water tank with a separating funnel to maintain a certain concentration.

Claims (4)

1. A photocatalytic water gas treatment tower, the treatment tower includes a water tank, a reaction body, an adsorption device, a water circulation device, and a gas delivery device, and is characterized in that the water gas treatment tower adopts a photocatalytic advanced oxidation method, which can convert various Organic pollutants with complex components are oxidized and decomposed into carbon dioxide and water. The water tank has a built-in ultraviolet lamp for photocatalytic reaction. The required oxidizing reagent is added dropwise into the water tank using a separatory funnel. Effective concentration, the reaction body has several layers of water distribution boards, a large space is left on one side of the water distribution boards, as a gas passage, and there is a water retaining board about 5cm high on the edge. A layer of water is formed, which is used to catalyze the decomposition of organic matter absorbed in water. The surface of the water distribution plate is evenly distributed with holes with a diameter of about 2 mm. Under the action of water pressure and air pressure, water is sprayed through the holes of the water distribution plate to The next layer, so that a spray layer is formed between the two layers of water distribution boards, the gas is mixed with the water mist in the spray layer, and the catalytic oxidation reaction and absorption process are carried out under the irradiation of ultraviolet lamps. The circulating water device adopts a corrosion-resistant water pump As power, water is pumped from the water tank to the top of the reaction tower through a corrosion-resistant pipeline, and sprayed into the reaction body by the spraying device on the top of the tower. The gas delivery device uses a fan to blow the collected waste gas into the bottom of the reaction tower. The water pump and the fan Power needs to match. 2. The photocatalytic water gas treatment tower as claimed in claim 1, characterized in that a UV lamp is built between every two layers of water distribution boards of the reaction body, the UV lamp is protected by a quartz sleeve, and the UV lamp provides catalytic oxidation. Light source required. 3. The photocatalytic water gas treatment tower as claimed in claim 1, characterized in that the reaction body is provided with a demister, and the water vapor condenses and drops on the demister. 4. The photocatalytic water gas treatment tower as claimed in claim 1, characterized in that the adsorption device is a partition box with built-in activated carbon, the cover on the top of the box can be opened to facilitate loading and unloading of activated carbon, and one side is the air inlet , the other side is the gas outlet, and the gas outlet is provided with a tee.