A waste activated carbon internal circulation sunlight regeneration and light oxygen regeneration box

Abstract

The present application relates to a kind of waste activated carbon internal circulation sunlight regeneration and light oxygen regeneration box, including box, be equipped with VOCs photolysis board in box, several layers of support for placing waste activated carbon are connected between VOCs photolysis board and box, box front is sunny, high light transmission glass door is installed in box front, box side is closed;VOCs photolysis board and box upper and lower surface have air passage, form internal air circulation, and circulating air promotes the adsorbate in waste activated carbon constantly desorption;Irradiation and the photolysis gas generated by VOCs photolysis board, organic matter in waste activated carbon and circulating air is constantly decomposed.The beneficial effects of the present application are: after adsorption saturation, activated carbon is transferred to regeneration box, and can directly receive illumination to realize regeneration and the oxidation gas generated by VOCs photolysis board oxidation regeneration, natural circulation system desorbs activated carbon adsorbate and strengthens desorption process, gradually makes the organic matter of waste activated carbon adsorption completely removed, so as to realize the regeneration of waste activated carbon.

Description

Technical Field

[0001] This invention belongs to the field of waste activated carbon regeneration technology, and specifically relates to a waste activated carbon internal circulation sunlight regeneration and photo-oxidation regeneration box. Background Technology

[0002] Activated carbon is amorphous carbon that has undergone activation treatment. It exists in powder, granular, or pellet form and possesses strong adsorption capacity. Activation treatment removes various oils and impurities from the surface of the amorphous carbon, increasing its pore number, surface area, and surface activity, thereby enhancing its ability to adsorb many gases, liquids, or certain solutes in solutions. Activated carbon regeneration refers to the process of removing adsorbates adsorbed in the micropores of activated carbon using physical, chemical, or biochemical methods without damaging its original structure, thus restoring its adsorption performance.

[0003] Currently, activated carbon regeneration methods include: 1. Thermal regeneration: This method results in significant carbon loss (5%–10%) during regeneration. The regenerated carbon also exhibits reduced mechanical strength and adsorption efficiency, and after repeated regeneration, it loses its adsorption capacity. 2. Biological regeneration: This method has a long regeneration time, and temperature greatly affects the regeneration effect. Furthermore, while microorganisms are highly selective in treating pollutants, they generally cannot completely decompose all organic matter into CO2 and H2O; intermediate products remain in the micropores, leading to a significant decrease in regeneration efficiency after multiple cycles. 3. Wet oxidation regeneration: This method results in substantial activated carbon loss, a significant decrease in adsorption capacity after regeneration, and the exhaust gas generated during regeneration causes secondary pollution.

[0004] Application No. 2023116670604, Application Date 2023.12.05, Publication No. CN117599765A, Publication Date 2024.02.27, Patent Title: A Method for Reusing Photoinitiator-Initiated Activated Carbon After Decolorization. The method involves pre-treating used activated carbon, then microwave-degrading it in a microwave oven, followed by elution with sodium hydroxide, hot filtration with a surfactant, washing with hot water until neutral, activating the treated activated carbon with an activating agent, and finally washing and drying it to recycle the activated carbon. However, this method requires raw materials and energy, and generates secondary pollution, failing to meet the requirements of small industrial enterprises for low-cost, low-energy, and easy-to-operate waste activated carbon recycling. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, and especially to address the needs of small and micro enterprises for the disposal of hazardous waste—waste activated carbon, this invention provides a waste activated carbon internal circulation solar regeneration and photo-oxidation regeneration box.

[0006] This invention is achieved through the following technical solution: A waste activated carbon internal circulation solar regeneration and photo-oxidation regeneration box includes a box body, characterized in that: a VOCs photolysis plate is provided inside the box body, and several layers of supports for placing waste activated carbon are connected between the VOCs photolysis plate and the box body. The front of the box body faces the sun, and a high-transmittance glass door is installed on the front of the box body, while the sides of the box body are closed. Air channels are provided on the upper and lower surfaces of the VOCs photolysis plate and the box body to form internal air circulation. The circulating air promotes the continuous desorption of adsorbates in the waste activated carbon, generating air containing VOCs. The sunlight and the photolysis gas generated by the VOCs photolysis plate continuously decompose the organic matter in the waste activated carbon and the VOCs in the VOCs-containing air.

[0007] Air channels are provided between the upper and lower ends of the VOCs photolysis plate and the housing, forming a natural air circulation system together with the housing shell to promote desorption under the activated carbon adsorption equilibrium state.

[0008] A safety valve is installed on the box.

[0009] One side of the high-transmittance glass door is hinged to the box body, and a handle is installed on the other side of the high-transmittance glass door.

[0010] The beneficial effects of this invention are as follows: After adsorption saturation, the activated carbon is transferred to a regeneration box, where it can be directly regenerated by light irradiation, oxidized by the oxidation gas generated by the VOCs photolysis plate, and regenerated by the oxidation gas from the natural circulation system desorbing the adsorbate from the activated carbon. This strengthens the desorption process and decomposes the adsorbate during circulation, gradually and completely removing the organic matter adsorbed by the waste activated carbon, thus achieving regeneration. The operation is simple, consumes almost zero energy, and has advantages such as being environmentally friendly, energy-saving, and free from secondary pollution. It is suitable for small industrial enterprises that use activated carbon to adsorb organic matter. Attached Figure Description

[0011] The invention will now be further described with reference to the accompanying drawings.

[0012] Appendix Figure 1 This is a schematic diagram of the structure of the present invention; Appendix Figure 2 This is a schematic diagram of the main structure of the present invention; Appendix Figure 3 This is a side view of the structure of the present invention; Appendix Figure 4 This is a top view of the structure of the present invention; In the diagram, 1 is the enclosure, 2 is the VOCs photolysis plate, 3 is the bracket, 4 is the high-transmittance glass door, 5 is the air passage, 6 is the safety valve, and 7 is the handle. Detailed Implementation

[0013] The attached figure illustrates a specific embodiment of the present invention. This embodiment includes a housing 1, a high-transmittance glass door 4, a VOCs photolysis plate 2, a support 3 and accessories such as waste activated carbon, an air passage 5, a safety valve 6, and a handle 7 placed on it.

[0014] VOCs are removed through the synergistic effect of direct sunlight shining on the spent activated carbon through the high-transmittance glass door 4 and the decomposition gas oxidation on the VOCs photolysis plate 2, while VOCs in the circulating air are also oxidized and removed. Direct sunlight can remove VOCs, and photo-oxidation can also remove them; this is a synergistic effect. The circulating air is removed through desorption due to the air concentration difference and the aforementioned synergistic effect. Due to the sunlight, the rising of the gas after the temperature rises on the illuminated surface causes the exhaust gas to continuously circulate in the space before and after the box 1 divided by the VOCs photolysis plate 2, continuously desorbing and decomposing VOCs until the spent activated carbon is regenerated.

[0015] The closed, low-temperature system ensures the safety of the housing 1, while accessories such as the safety valve 6 further ensure the safety of the regeneration of this waste activated carbon.

[0016] Air channels 5 are provided between the upper and lower ends of the VOCs photolysis plate 2 and the housing 1, while its side walls and the entire housing 1 are sealed. The high-transmittance glass door 4 is a sealed door to facilitate the placement of waste activated carbon on the support 3 and the removal of regenerated activated carbon.

[0017] The waste activated carbon internal circulation solar regeneration and photo-oxidation regeneration box of this invention utilizes light and catalysts to achieve desorption and regeneration of activated carbon, degradation of VOCs in circulating air, and degradation of adsorbed pollutants through photogenerated free radicals, restoring the adsorption capacity of activated carbon. Under ultraviolet or visible light irradiation, the semiconductor catalyst (such as TiO2) supported on the surface of activated carbon is excited to generate highly active hydroxyl radicals (·OH). These free radicals can oxidize and decompose organic pollutants adsorbed in the micropores of activated carbon into harmless small molecules such as CO2 and H2O.

Claims

1. A waste activated carbon internal circulation solar regeneration and photo-oxidation regeneration box, comprising a box body (1), characterized in that: The box (1) is equipped with a VOCs photolysis plate (2). Several layers of supports (3) for placing waste activated carbon are connected between the VOCs photolysis plate (2) and the box (1). The front of the box (1) faces the sun. A high-transmittance glass door (4) is installed on the front of the box (1). The sides of the box (1) are closed. The VOCs photolysis plate (2) and the box (1) have air channels (5) on the top and bottom, forming an internal air circulation. The circulating air promotes the continuous desorption of adsorbates in the waste activated carbon. The light and the photolysis gas generated by the VOCs photolysis plate (2) continuously decompose the VOCs in the waste activated carbon and the VOCs in the circulating air.

2. The waste activated carbon internal circulation solar regeneration and photo-oxidation regeneration box according to claim 1, characterized in that: The VOCs photolysis plate (2) is provided with an air channel (5) between its upper and lower ends and the box (1), which together with the outer shell of the box (1) constitutes a natural wind circulation system. Under the action of the activated carbon adsorption balance force, the continuously circulating relatively clean gas continuously desorbs the VOCs adsorbed in the waste activated carbon, thereby further removing VOCs during the circulation process.

3. The waste activated carbon internal circulation solar regeneration and photo-oxidation regeneration box according to claim 1, characterized in that: A safety valve (6) is installed on the housing (1).

4. The waste activated carbon internal circulation solar regeneration and photo-oxidation regeneration box according to claim 1, characterized in that: The high-transparency glass door (4) is hinged to the box body (1) on one side, and a handle (7) is installed on the other side of the high-transparency glass door (4).

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