CN104474839B - Desorption regeneration device and desorption regeneration method of active carbon filter layer in air cleaning equipment - Google Patents

Abstract

The invention discloses a desorption regeneration device and a desorption regeneration method for an activated carbon filter layer in air purification equipment, wherein the desorption regeneration device includes an induced draft fan of the air purification equipment, an activated carbon filter layer and a movable grid plate, and the induced draft fan and movable grids are located on both sides of the activated carbon filter layer, an AC power supply and a pair of parallel electrodes are also arranged in the air purification equipment, and the activated carbon filter layer is located between the pair of parallel electrodes, so The voltage pressure of the AC power supply is 10-50kV/m, and the two stages of the AC power supply are respectively connected to an electrode, and a desorption channel is also arranged between the activated carbon filter layer and the movable grid plate, and a desorption channel is arranged between the desorption channel. side connected to a bypass channel. Compared with the prior art, the present invention regenerates the activated carbon filter layer in the air purification equipment through relatively simple equipment, thereby increasing the service life of the activated carbon and reducing the working cost of the air purification equipment.

Description

Desorption regeneration device and desorption regeneration method for activated carbon filter layer in air purification equipment

technical field

The invention relates to the field of environmental protection, in particular to indoor air purification equipment.

Background technique

People spend most of their lives in indoor spaces, and indoor air quality is closely related to human health. In recent years, the atmospheric environment on which we live has been increasingly polluted, and haze weather and various industrial pollution sources have also led to the deterioration of indoor air quality. In addition, volatile organic compounds (volatile organic compounds) produced by the increasingly complicated use of various decoration and furniture materials Compounds) pollution is another major contributor to the decline in indoor air quality. All these make indoor air purification products have important research and development value and broad market space.

At present, home appliance manufacturers such as Sharp, Toshiba, Panasonic, Daikin, Midea, and Electrolux have launched various types of air purifiers in the market, and have also developed their own unique patented technologies. Most of these purification products adopt a composite purification mode such as high-efficiency filter filtration, plasma (negative ion) purification, and adsorbent adsorption. In these air purifiers, activated carbon material is widely used as an efficient adsorbent for removing formaldehyde and other organic pollutants because it contains a large number of micropores and has a huge specific surface area, and has achieved well-recognized air purification. Effect. However, as volatile organic pollutants are continuously adsorbed in the pores of activated carbon, the adsorbable amount of activated carbon is also continuously reduced. After a period of time, the activated carbon filter layer in the purification equipment will fail, which increases the cost of air purification products and affects the practicability of the air purifier. Discarded activated carbon filters will also cause secondary pollution.

Therefore, it is of great significance to develop an effective activated carbon desorption method and improve the service life of the activated carbon filter layer in the air purifier for the promotion and popularization of air purification products.

At present, in the field of industrial applications, researchers at home and abroad have developed activated carbon desorption regeneration technologies such as thermal regeneration technology, solution regeneration technology, and electrochemical regeneration technology. However, these technologies are often complex and expensive and cannot be directly applied to air purification equipment.

Contents of the invention

The technical problem to be solved by the present invention is to provide an easy-to-implement and low-cost desorption regeneration device and desorption regeneration method for the activated carbon filter layer in the air purification equipment, so that the adsorbed VOCs are desorbed from the surface and pores of the activated carbon to realize the regeneration and reuse of the activated carbon filter layer.

The technical scheme that realizes technical problem of the present invention is like this:

A desorption regeneration device for an activated carbon filter layer in an air purification device, comprising an induced fan of the air purification device, an activated carbon filter layer and a movable grid, the induced fan and the movable grid are located on both sides of the activated carbon filter layer, It is characterized in that: an AC power supply and a pair of parallel electrodes are also arranged in the air purification equipment, the activated carbon filter layer is located between the pair of parallel electrodes, and the voltage of the AC power supply is 10-50kV /m, the two stages of the AC power supply are respectively connected to an electrode, and a desorption channel is also arranged between the activated carbon filter layer and the movable grid plate, and a bypass channel is connected to one side of the desorption channel.

The parallel electrodes are mesh or disc electrodes.

The voltage of the AC power supply is 3-50kV/m.

A method for desorption and regeneration of an activated carbon filter layer in an air purification device. A mesh or disc-shaped electrode is respectively arranged on both sides of the activated carbon filter layer in parallel directions. Turn on the power, adjust the voltage intensity of the AC power supply to 10~50kV/m of the equipment, and generate dipole moment changes between the activated carbon molecules and the pollutants through the electrodes on both sides to desorb the pollutant molecules from the activated carbon; At the same time as activated carbon, the induced draft fan of the air purification equipment is working at the same time, and the desorbed pollutant molecules are taken out of the room through the bypass channel through the airflow.

Compared with prior art, the beneficial effect of the present invention is:

A separate desorption device is directly added inside the air purification equipment to directly perform desorption treatment of volatile organic pollutants. The desorption device has a simple structure, low cost and realizes repeated regeneration of the activated carbon filter layer. Improve the service life of the core components inside the purifier.

Considering the breakdown effect of air, in order to ensure the safety of equipment and instruments, the voltage strength should not exceed 50kV/m. As the field strength acting on the activated carbon layer increases, the polarization of organic pollutants increases, and the adsorption potential between pollutant molecules and activated carbon decreases accordingly, thereby enhancing the desorption of pollutants from the activated carbon filter layer. process.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the desorption regeneration device of the present invention.

Fig. 2 is a schematic diagram of the concentration change of the residue when the desorption method of the present invention and the existing desorption method are used for desorption.

Among them 1. AC power supply, 2. Induced fan, 3. Electrode, 4. Activated carbon filter layer, 5. Bypass pipe, 6. Movable grid plate.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the desorption regeneration device of activated carbon filter layer in a kind of air purification equipment of the present invention comprises AC power supply 1, induced draft fan 2, electrode 3, activated carbon filter layer 4 and movable grid plate 6, wherein electrode 3 is a For parallel electrodes, the electrodes are mesh or disc electrodes. The induced draft fan 2 and the movable grid 6 are located on both sides of the activated carbon filter layer 4, and the activated carbon filter layer 4 is located between a pair of parallel electrodes. One electrode 3 is connected, and a desorption channel is provided between the active carbon filter layer 4 and the movable grid plate 6, and a bypass channel 5 is connected to one side of the desorption channel.

The method for desorption and regeneration of the activated carbon filter layer of the present invention is that two electrodes 3 are arranged in parallel in symmetrical positions on both sides of the position where the activated carbon filter layer 4 is installed inside the air purifier. When the desorption system starts to work, the induced draft fan 2 is kept working, and at the same time, the movable grid plate 6 on the main passage of the purified air is closed, and the bypass pipe 5 connected to the outdoor is opened. The electrode plate 3 is connected to the AC power source 1, and the voltage intensity of the AC power source 1 is adjusted to 20kV/m. Under the action of this high-frequency alternating electromagnetic field, the volatile organic pollutant molecules in the activated carbon begin to desorb, and are brought into the bypass pipe 5 by the airflow of the fan. While the desorption system is working, use the VOCs detection equipment attached to the air purifier to detect the VOCs concentration near the electrode 3 online. When the concentration is less than the detection threshold, the desorption process ends. As shown in Figure 2, by comparing the desorption process of activated carbon under the condition of no voltage, it can be seen that under the action of an electric field, the regeneration efficiency of activated carbon is significantly increased.

Claims (4)

1. the desorption and regeneration device of activated carbon filter layer in an air cleaning facility, air-introduced machine including air cleaning facility, activated carbon filter layer and movable screen, described air-introduced machine and movable screen are positioned at the both sides of described activated carbon filter layer, it is characterized in that: in described air cleaning facility, be additionally provided with an alternating current power supply and pair of parallel electrode, described activated carbon filter layer is between the pair of parallel pole, the two poles of the earth of alternating current power supply are connected with an electrode respectively, desorption electric field is formed between two parallel poles, the desorption electric field intensity that described alternating current power supply produces is 10 ~ 50kV/m, it is additionally provided with a desorption passage between described activated carbon filter layer and movable screen, bypass channel is connected in the side of desorption passage.

Desorption and regeneration device the most according to claim 1, it is characterised in that: described parallel pole is netted or dish-type electrode.

Desorption and regeneration device the most according to claim 1, it is characterised in that: the desorption electric field intensity that described alternating current power supply produces is 30 ~ 50kV/m.

4. a desorption process for regenerating based on the desorption and regeneration device described in claim 1, it is characterized in that: the both sides parallel direction at activated carbon filter layer is respectively arranged a netted or dish-type electrode, when activated carbon adsorption amount is close to time saturated, activated carbon filter layer two lateral electrode is connected with alternating current power supply, the desorption electric field intensity that alternating current power supply produces is adjusted to 20kV/m, between activated carbon molecule and pollutant, produces dipole moment by two lateral electrodes and contaminant molecule is desorbed out activated carbon；While electrode effect Detachment Activity charcoal, the air-introduced machine of air cleaning facility works at the same time, and the contaminant molecule from bypass channel, desorption gone out by air-flow takes outdoor out of.