Waste gas treatment equipment for VOCs (Volatile Organic Compounds) of solar photovoltaic coated glass

Abstract

The utility model discloses waste gas treatment equipment for VOCs (Volatile Organic Chemicals) of solar photovoltaic coated glass. The waste gas treatment equipment comprises a heat exchange cooling device, a waste gas adsorption device, a catalytic combustion device and an exhaust device, the heat exchange cooling device comprises a heat exchange cooler and a dry filter; the waste gas adsorption device comprises an adsorption rotating wheel and a first heat exchanger, the adsorption rotating wheel periodically flows into an adsorption area, a desorption area and a cooling area, the adsorption area and the cooling area are respectively communicated with the dry filter, and the cooling area is communicated with the desorption area and flows through the first heat exchanger; the catalytic combustion device comprises a second heat exchanger and a catalytic combustion bed, the desorption area is communicated with the second heat exchanger through a desorption fan, and the catalytic combustion bed is communicated with the second heat exchanger and flows through the first heat exchanger; the exhaust device comprises a water washing tower and a chimney, the water washing tower is communicated with the adsorption area through a main fan, and the water washing tower is communicated with the second heat exchanger. According to the utility model, the operations of waste gas heat exchange cooling, adsorption purification, catalytic combustion and clean emission are realized.

Description

A waste gas treatment device for VOCs from solar photovoltaic coated glass. Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically to a waste gas treatment device for VOCs from solar photovoltaic coated glass. Background Technology

[0002] The rise of the solar photovoltaic industry has led to increasing demand for related industries such as photovoltaic coated glass. Because the composition of VOCs in solar photovoltaic coated glass differs from that of other industries—primarily isopropanol—conventional waste gas treatment facilities are ineffective. This is especially true since the waste gas from these projects originates from the coating and curing processes, and the high temperature of the exhaust from the curing furnace makes conventional treatment methods unsuitable. Therefore, a targeted waste gas treatment device needs to be designed based on the characteristics of the waste gas composition, temperature, and humidity. Summary of the Invention

[0003] To overcome the above-mentioned technical problems, this utility model discloses a waste gas treatment device for VOCs of solar photovoltaic coated glass.

[0004] The technical solution adopted by this utility model to achieve the above objectives is as follows:

[0005] A waste gas treatment device for VOCs from solar photovoltaic coated glass, comprising a heat exchange and cooling device, a waste gas adsorption device, a catalytic combustion device, and an exhaust device.

[0006] The heat exchange and cooling device includes a heat exchanger and a dry filter arranged sequentially along the direction of exhaust gas flow.

[0007] The waste gas adsorption device includes an adsorption rotor and a first heat exchanger. The adsorption rotor periodically rotates between an adsorption zone, a desorption zone, and a cooling zone. The adsorption zone and the cooling zone are respectively connected to the dry filter. The cooling zone is connected to the desorption zone and flows through the first heat exchanger.

[0008] The catalytic combustion device includes a second heat exchanger and a catalytic combustion bed arranged in sequence. The desorption zone is connected to the second heat exchanger through a desorption fan. The catalytic combustion bed is connected to the second heat exchanger and flows through the first heat exchanger.

[0009] The exhaust device includes a water washing tower and a chimney arranged sequentially along the exhaust gas flow direction. The water washing tower is connected to the adsorption zone through a main fan, and the water washing tower is also connected to the second heat exchanger.

[0010] The aforementioned waste gas treatment equipment for VOCs from solar photovoltaic coated glass includes a three-stage dry filter consisting of a G4 filter, an F7 filter, and an F9 filter.

[0011] The aforementioned waste gas treatment equipment for VOCs from solar photovoltaic coated glass, wherein the adsorption rotor is a honeycomb-shaped adsorption rotor, and the adsorption rotor is provided with a hydrophobic zeolite adsorption structure.

[0012] The aforementioned waste gas treatment equipment for VOCs from solar photovoltaic coated glass includes a fire damper and a switching valve sequentially installed at the air inlet with strong heat exchange and cooling along the waste gas flow direction.

[0013] The aforementioned waste gas treatment equipment for VOCs from solar photovoltaic coated glass includes a first pneumatic valve installed between the cooling zone and the desorption zone.

[0014] The aforementioned waste gas treatment equipment for VOCs from solar photovoltaic coated glass includes a second pneumatic valve installed between the first heat exchanger and the desorption zone.

[0015] The aforementioned waste gas treatment equipment for VOCs from solar photovoltaic coated glass includes a catalyst structure within the catalytic combustion bed, wherein the catalyst structure is a precious metal catalyst.

[0016] The aforementioned waste gas treatment equipment for VOCs from solar photovoltaic coated glass, wherein the catalyst structure is a platinum and / or palladium catalyst, and the catalyst structure is a honeycomb catalyst.

[0017] The aforementioned waste gas treatment equipment for VOCs from solar photovoltaic coated glass includes an electrically heated component within the catalytic combustion bed.

[0018] In the aforementioned waste gas treatment equipment for VOCs from solar photovoltaic coated glass, the electric heating component is a stainless steel finned electric heating tube.

[0019] The beneficial effects of this utility model are as follows: This utility model is reasonably and ingeniously designed. By combining the heat exchange and cooling device, the waste gas adsorption device, the catalytic combustion device, and the exhaust device, it achieves heat exchange and cooling, adsorption and purification, catalytic combustion, and clean emission of waste gas. Specifically, the heat exchange and cooling device and the dry filter pre-treat the waste gas to remove particulate matter, improving efficiency. The adsorption rotor facilitates the periodic adsorption of organic pollutants in the waste gas, gas purification and desorption, and adsorbent regeneration, offering advantages such as high-efficiency purification, low energy consumption for adsorbent regeneration, and high operational safety. The catalytic combustion bed performs flameless catalytic combustion of the waste gas, fully converting the remaining organic components into non-toxic and harmless carbon dioxide for discharge, achieving the goal of harmless and green production. Simultaneously, it releases a large amount of heat, which is maintained at the ignition temperature required for catalytic combustion by the second heat exchanger, ensuring that the waste gas combustion process requires virtually no external energy consumption. Furthermore, some heat is used for adsorbent desorption and regeneration through the first heat exchanger, significantly reducing energy consumption. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 is a schematic diagram of the structure of this utility model. Detailed Implementation

[0022] The present invention will be further described below through specific embodiments, so as to make the technical solution of the present invention easier to understand and master, rather than to limit the present invention.

[0023] Example: Referring to Figure 1, this example provides a waste gas treatment device for VOCs of solar photovoltaic coated glass, which includes a heat exchange and cooling device, a waste gas adsorption device, a catalytic combustion device and an exhaust device.

[0024] The heat exchange and cooling device includes a heat exchanger 1 and a dry filter 2 arranged sequentially along the direction of exhaust gas flow;

[0025] The waste gas adsorption device includes an adsorption rotor 3 and a first heat exchanger 4. The adsorption rotor 3 periodically rotates between an adsorption zone 31, a desorption zone 32 and a cooling zone 33. The adsorption zone 31 and the cooling zone 33 are respectively connected to the dry filter 2. The cooling zone 33 is connected to the desorption zone 32 and flows through the first heat exchanger 4.

[0026] The catalytic combustion device includes a second heat exchanger 5 and a catalytic combustion bed 6 arranged in sequence. The desorption zone 32 is connected to the second heat exchanger 5 through a desorption fan 10. The catalytic combustion bed 6 is connected to the second heat exchanger 5 and flows through the first heat exchanger 4.

[0027] The exhaust device includes a water washing tower 7 and a chimney 8 arranged sequentially along the exhaust gas flow direction. The water washing tower 7 is connected to the adsorption zone 31 through a main fan 9, and the water washing tower 7 is connected to the second heat exchanger 5.

[0028] Specifically, the heat exchange and cooling device, waste gas adsorption device, catalytic combustion device, and exhaust device are configured to achieve heat exchange and cooling, adsorption and purification, catalytic combustion, and clean emission of waste gas. The heat exchange and cooling device 1 and the dry filter 2 pre-treat the waste gas to remove particulate matter, improving efficiency. The adsorption rotor 3 facilitates the periodic adsorption of organic pollutants in the waste gas, gas purification and desorption, and adsorbent regeneration, offering advantages such as high-efficiency purification, low energy consumption for adsorbent regeneration, and high operational safety. The catalytic combustion bed 6 performs flameless catalytic combustion of the waste gas, fully converting the remaining organic components into non-toxic and harmless carbon dioxide for discharge, achieving the goal of harmless and green production. Simultaneously, a large amount of heat is released, which is maintained at the ignition temperature required for catalytic combustion in the catalytic combustion bed 6 by the second heat exchanger 5, ensuring that the waste gas combustion process requires virtually no external energy consumption. Furthermore, some of the heat is used for adsorbent desorption and regeneration by the first heat exchanger 4, significantly reducing energy consumption.

[0029] Specifically, since the main component of the exhaust gas is isopropanol and its discharge temperature is high, if it is directly filtered and adsorbed, the adsorption efficiency can only reach 50-60%. Therefore, in this embodiment, the heat exchange and cooling device is added to pre-treat the exhaust gas by cooling it. After being adsorbed by the adsorption wheel 3, the adsorption efficiency can be increased to 80-90%.

[0030] Specifically, the water washing tower 7 sprays and cleans the catalytically combusted gas, which can both cool the exhaust gas and capture the small amount of isopropanol in the exhaust gas, effectively reducing the emission concentration.

[0031] Preferably, the dry filter 2 is a three-stage filter, including a G4 filter, an F7 filter, and an F9 filter; wherein, the adsorption conditions of the dry filter 2 are: adsorption temperature < 40℃, gas flow rate 1.5-5m / s, and adsorption material thickness 400-450mm; the G4 filter is a pre-filter, mainly used to filter dust particles larger than 5μm, the F7 filter is a medium-efficiency filter, mainly used to filter dust particles larger than 1μm, and the F9 filter is a medium-high efficiency filter, mainly used to filter dust particles larger than 0.5μm.

[0032] Preferably, the adsorption rotor 3 is a honeycomb-shaped adsorption rotor, and the adsorption rotor 3 is provided with a hydrophobic zeolite adsorption structure. The hydrophobic zeolite adsorption structure is used to purify the exhaust gas by utilizing its strong adsorption of organic compounds and its characteristic of not absorbing moisture from the air, so as to achieve efficient purification.

[0033] Furthermore, a fire damper and a switching valve are sequentially installed at the air inlet with strong heat exchange and cooling along the direction of exhaust gas flow, which effectively improves the operational safety of the equipment.

[0034] Furthermore, a first pneumatic valve 34 is provided between the cooling zone 33 and the desorption zone 32, and a second pneumatic valve 35 is provided between the first heat exchanger 4 and the desorption zone 32, which helps to regulate the gas pressure and flow rate in the adsorption rotor 3 and effectively improves the operational safety of the adsorption rotor 3.

[0035] Preferably, the catalytic combustion bed 6 is provided with a catalyst structure 61, which is a noble metal catalyst;

[0036] Preferably, the catalyst structure 61 is a platinum and / or palladium catalyst, and the catalyst structure 61 is a honeycomb catalyst;

[0037] Specifically, the catalyst structure 61 uses honeycomb ceramic as a carrier and is impregnated with precious metals platinum and palladium, which has the advantages of high activity, high temperature resistance and long service life.

[0038] Preferably, the catalytic combustion bed 6 is provided with an electric heating component 62, which is a stainless steel finned heating tube;

[0039] Specifically, the electric heating component 62 is composed of a φ25 high-temperature thin tube lined with high-temperature magnesium oxide and an electric heating wire. It uses the principle of electric heating radiation for heating and has the advantages of high efficiency, fast heat dissipation and long life.

[0040] When this utility model is in operation, it includes the following steps:

[0041] (1) After the exhaust gas is cooled to 25°C by the heat exchanger 1, it enters the dry filter 2 for pretreatment filtration to remove particulate matter;

[0042] When the exhaust gas meets the following standard, it enters the subsequent adsorption rotor 3: oil mist < 0.1 mg / Nm³. 3 Dust <1mg / Nm 3 Acid > pH 5, Alkali < pH 7, Relative Humidity < 80%RH;

[0043] (2) The filtered waste gas enters the adsorption zone 31 and the cooling zone 33. As the adsorption wheel 3 rotates continuously, part of the waste gas is adsorbed by the hydrophobic zeolite adsorption structure that has been desorbed and regenerated in the cooling zone 33, and the remaining waste gas is adsorbed by the hydrophobic zeolite adsorption structure in the adsorption zone 31. The waste gas that has partially removed organic compounds is desorbed by the hydrophobic zeolite adsorption structure in the desorption zone 32 due to high temperature so that it flows out with the regeneration air. The desorbed hydrophobic zeolite adsorption structure is regenerated in the cooling zone 33, so as to realize the periodic operation of adsorption of organic pollutants in waste gas, gas purification and desorption, and adsorbent regeneration.

[0044] (3) The desorbed waste gas enters the catalytic combustion bed 6 via the desorption fan 10. The electric heating component 62 preheats the catalyst structure 61. When the temperature of the catalytic combustion bed 6 reaches the preset value of 300°C, the catalytic combustion bed 6 performs flameless catalytic combustion on the waste gas under the catalytic action of the catalyst structure 61, so that the remaining organic components in the waste gas are fully converted into non-toxic and harmless carbon dioxide and water and discharged.

[0045] (4) The gas that has been catalytically combusted is sprayed and cleaned by the water washing tower 7. After meeting the national, local and industry exhaust emission standards, it is finally discharged through the chimney 8.

[0046] This utility model is reasonably and ingeniously designed. By combining the heat exchange and cooling device, waste gas adsorption device, catalytic combustion device, and exhaust device, it achieves heat exchange and cooling, adsorption and purification, catalytic combustion, and clean emission of waste gas. Specifically, the heat exchange and cooling device 1 and the dry filter 2 pre-treat the waste gas to remove particulate matter, improving efficiency. The adsorption rotor 3 facilitates the periodic adsorption of organic pollutants in the waste gas, gas purification and desorption, and adsorbent regeneration, offering advantages such as high-efficiency purification, low energy consumption for adsorbent regeneration, and high operational safety. The catalytic combustion bed 6 performs flameless catalytic combustion of the waste gas, fully converting the remaining organic components into non-toxic and harmless carbon dioxide for discharge, achieving the goal of harmless and green production. Simultaneously, it releases a large amount of heat, which is maintained at the ignition temperature required for catalytic combustion by the second heat exchanger 5, ensuring that the waste gas combustion process requires virtually no external energy consumption. Furthermore, some of the heat is used for adsorbent desorption and regeneration through the first heat exchanger 4, significantly reducing energy consumption.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the disclosed technical means and content, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the shape, structure, and principle of this utility model without departing from its technical solution should be covered within the protection scope of this utility model.

Claims

1. A waste gas treatment device for VOCs from solar photovoltaic coated glass, characterized in that, It includes a heat exchange and cooling device, a waste gas adsorption device, a catalytic combustion device, and an exhaust device; the heat exchange and cooling device includes a heat exchanger and a dry filter arranged sequentially along the waste gas flow direction; the waste gas adsorption device includes an adsorption rotor and a first heat exchanger, the adsorption rotor periodically rotating between an adsorption zone, a desorption zone, and a cooling zone, the adsorption zone and the cooling zone being respectively connected to the dry filter, the cooling zone being connected to the desorption zone and flowing through the first heat exchanger; the catalytic combustion device includes a second heat exchanger and a catalytic combustion bed arranged sequentially, the desorption zone being connected to the second heat exchanger via a desorption fan, the catalytic combustion bed being connected to the second heat exchanger and flowing through the first heat exchanger; the exhaust device includes a water scrubbing tower and a chimney arranged sequentially along the waste gas flow direction, the water scrubbing tower being connected to the adsorption zone via a main fan, and the water scrubbing tower being connected to the second heat exchanger.

2. The waste gas treatment equipment for VOCs from solar photovoltaic coated glass according to claim 1, characterized in that, The dry filter is a three-stage filter, including a G4 filter, an F7 filter, and an F9 filter.

3. The waste gas treatment equipment for VOCs from solar photovoltaic coated glass according to claim 2, characterized in that, The adsorption rotor is a honeycomb-shaped adsorption rotor, and the adsorption rotor is provided with a hydrophobic zeolite adsorption structure.

4. The waste gas treatment equipment for VOCs from solar photovoltaic coated glass according to claim 3, characterized in that, A fire damper and a switching valve are sequentially installed at the air inlet with strong heat exchange and cooling capacity along the direction of exhaust gas flow.

5. The waste gas treatment equipment for VOCs from solar photovoltaic coated glass according to claim 4, characterized in that, A first pneumatic valve is provided between the cooling zone and the desorption zone.

6. The waste gas treatment equipment for VOCs from solar photovoltaic coated glass according to claim 5, characterized in that, A second pneumatic valve is provided between the first heat exchanger and the desorption zone.

7. The waste gas treatment equipment for VOCs from solar photovoltaic coated glass according to claim 1, characterized in that, The catalytic combustion bed contains a catalyst structure, which is a noble metal catalyst.

8. The waste gas treatment equipment for VOCs from solar photovoltaic coated glass according to claim 1, characterized in that, The catalytic combustion bed is equipped with an electric heating component.

9. The waste gas treatment equipment for VOCs from solar photovoltaic coated glass according to claim 8, characterized in that, The electric heating component is a stainless steel finned heating tube.

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