Printing and dyeing waste gas purification system

Abstract

The invention discloses a printing and dyeing waste gas purification system, and relates to the technical field of environmental protection equipment. Comprising a shell with a purification cavity, a plurality of purification mechanisms which are symmetrically arranged at intervals are arranged in the purification cavity, an oxidation area is formed between every two adjacent purification mechanisms, the retention time of waste gas in the oxidation areas is not shorter than four seconds, and each purification mechanism comprises a light generation device and a photocatalyst device; waste gas can be subjected to photocatalytic cracking for multiple times through the multiple purification mechanisms arranged at intervals, oxidation reaction can be conveniently carried out after each time of photocatalysis in the oxidation zone, and through air holes formed in a catalyst plate, the circulation speed of the waste gas can be reduced, and the retention time of the waste gas is prolonged; the contact area and the contact time of ultraviolet light and the catalyst plate are greatly improved in a limited space, the contact opportunity and the reaction time of the ultraviolet light and waste gas are increased, and the purification efficiency and the purification effect are improved; a plurality of catalyst layers are sprayed on the catalyst plate with the honeycomb structure, so that the content and the specific surface area of a catalyst on the catalyst plate are improved, and the use effect of the catalyst plate is good.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection equipment, and in particular to a printing and dyeing waste gas purification system. Background Art

[0002] A large amount of waste gas is generated in industrial production. Direct discharge of waste gas will cause serious harm to the environment and human body, which is not conducive to sustainable development. Based on this, my country has taken a variety of measures to deal with waste gas emissions, mainly to purify the waste gas generated in industrial production before discharging it. The existing waste gas purification methods generally use adsorption, condensation, combustion, photocatalysis and biological methods. Adsorption and biological methods are treatment methods that have emerged in recent years. Their treatment methods are more environmentally friendly, but the efficiency is lower; the condensation and combustion equipment have complex structures and often require large equipment with high cost investment; photocatalytic treatment equipment is small in size and has a high efficiency in photocatalytic treatment of waste gas. Based on this, photocatalysis has received more attention in the market.

[0003] The printing and dyeing industry produces a lot of waste gas, such as ammonia, toluene, hydrogen sulfide, aniline and other waste gases. The principle of photocatalytic treatment of waste gas is generally to break the chemical bonds of chemical substances in the waste gas through light and catalysts to form free atoms or groups. At the same time, through oxidation reactions, the pollutants are finally cracked and oxidized into simple compounds. The existing photocatalytic equipment has failed to fully improve the efficiency of photocatalysis. Its shortcomings are that the existing equipment often allows the waste gas to be naturally catalyzed after passing it into the equipment, resulting in low efficiency, and the carrier structure design of the catalyst is unreasonable, resulting in low catalyst content and small specific surface area of ​​the catalyst. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a printing and dyeing waste gas purification system. By arranging a plurality of purification mechanisms arranged at intervals in the purification chamber, the waste gas can be catalytically decomposed while moving, thereby improving the purification efficiency. The honeycomb catalyst plate is sprayed with multiple layers of catalyst layers, which increases the specific surface area of ​​the catalyst and enhances the purification effect.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a printing and dyeing waste gas purification system, including a semi-enclosed shell, a purification chamber in the shell, a plurality of symmetrical and spaced purification mechanisms in the purification chamber, the purification chamber between two adjacent purification mechanisms forms an oxidation zone, the residence time of the waste gas in the oxidation zone is not less than four seconds, each of the purification mechanisms includes a light generating device and a photocatalyst device, the light generating device includes an ultraviolet lamp, the wavelength generated by the ultraviolet lamp is 154-184.9nm, the photon energy corresponds to 1200KJ / mol-600KJ / mol, and the ultraviolet dose is 45mw / c㎡.

[0006] The present invention is further configured as follows: the light generating device also includes a first supporting plate, the ultraviolet lamp tube is detachably mounted on the first supporting plate, at least one ultraviolet lamp tube is provided, the ultraviolet lamp tube faces the photocatalyst device, the photocatalyst device includes a second supporting plate and a catalyst plate, a side of the second supporting plate facing the ultraviolet lamp tube is provided with a plurality of supporting grooves in sequence from bottom to top, the catalyst plate is placed in the supporting grooves, and the supporting grooves correspond to the catalyst plates one by one.

[0007] The present invention is further configured as follows: the catalyst plate is made of a high molecular polymer material, a catalyst layer is evenly sprayed on the catalyst plate, the catalyst layer includes 1-5 layers, and a plurality of pores are opened on the second supporting plate between two adjacent supporting grooves, and the pores are used for the exhaust gas to circulate in the purification chamber.

[0008] The present invention is further configured as follows: the catalyst plate has a honeycomb structure, a plurality of honeycomb holes are provided on the plate surface of the catalyst plate, at least a portion of the catalyst layer is sprayed on the inner side of the honeycomb holes, the catalyst layer is a nano-grade titanium dioxide coating, and the nano-powder fineness of the titanium dioxide coating is 5-15nm.

[0009] The present invention is further configured as follows: an air inlet and an air outlet are respectively provided at opposite ends of the shell, and flat flanges are provided on the air inlet and the air outlet. A control panel is also fixed on the outer surface of the shell, and the control panel is electrically connected to the purification mechanism.

[0010] The present invention is further configured as follows: the shell includes an outer shell and an inner shell, the purification chamber is arranged in the inner shell, an interlayer space is provided between the outer shell and the inner shell, the interlayer space surrounds the periphery of the inner shell, the interlayer space forms a temperature control chamber, a part of the temperature control chamber is located in the top space of the inner shell to form a top surface cavity, the other part of the temperature control chamber is arranged on a side surface in the length direction of the shell to form a side cavity, the top surface cavity and the side cavity are communicated, and a refrigeration component is provided in the temperature control chamber.

[0011] The present invention is further configured as follows: the refrigeration component is installed in the side cavity, the refrigeration component includes a bracket and a cooling fan, the cooling fan is installed on the inner wall of the shell through the bracket, the refrigeration component is provided with at least two, the refrigeration component is used to cool the purification chamber, a temperature sensor is provided in the purification chamber, the temperature sensor is electrically connected to the control board, the refrigeration component is electrically connected to the control board, and the control board is arranged on the shell.

[0012] The present invention is further configured as follows: a plurality of vents are provided on the shell, the vents are used for exchanging air between the temperature control chamber and the outside, and an arc-shaped rain shield is provided above each vent.

[0013] The present invention is further configured as follows: a plurality of doorways are provided on the shell, the doorways respectively penetrate the outer shell and the inner shell and communicate with the purification chamber, the doorway is provided with a single door, a sealing plate is welded on the inner edge surface of the doorway, the single door is hinged on the sealing plate, and the single door corresponds to the purification mechanism one by one.

[0014] The present invention is further configured as follows: the inner shell is made of anodized aluminum plate, the outer shell is made of stainless steel, the thickness of the inner shell is 3-8 mm, and a plurality of support seats are provided at the bottom of the shell, and screw holes are provided on the sides of the support seats.

[0015] In summary, the present invention has the following beneficial effects: multiple purification mechanisms arranged at intervals can be used to perform photocatalytic cracking of exhaust gas multiple times; the oxidation zone located between the two purification mechanisms facilitates oxidation reaction after each photocatalysis; and the pores opened on the catalyst plate can reduce the circulation speed of exhaust gas, increase the residence time of exhaust gas, and maximize the contact area and time between ultraviolet light and the catalyst plate within a limited space, thereby increasing the contact opportunity and reaction time with exhaust gas and improving purification efficiency and effect; multiple layers of catalyst layers are sprayed on the catalyst plate with a honeycomb structure, thereby increasing the content of catalyst and specific surface area on the catalyst plate, and the use effect of the catalyst plate is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure of the present invention; Figure 2 It is a rear view of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 4 It is a schematic diagram of the catalyst plate structure of the present invention.

[0017] In the figure: 1. shell; 11. outer shell; 12. inner shell; 13. single door; 14. vent; 2. control panel; 3. air inlet; 4. air outlet; 5. purification chamber; 51. oxidation zone; 6. purification mechanism; 61. light generating device; 611. first supporting plate; 612. ultraviolet lamp tube; 613. mesh plate; 62. photocatalyst device; 621. second supporting plate; 622. catalyst plate; 6221. honeycomb hole; 623. supporting groove; 624. air hole; 7. temperature control chamber. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1 , Figure 2 , Figure 3As shown, a printing and dyeing waste gas purification system of the present invention has a shell 1, which includes two layers, a purification chamber 5 is formed in an inner shell 12, an outer shell 11 is wrapped around the outer periphery of the inner shell 12, the inner shell 12 is made of an anodized aluminum plate, the thickness of the inner shell 12 is 3-8 mm, the outer shell 11 is made of stainless steel material, the inner shell 12 made of anodized aluminum plate has good corrosion resistance and oxidation resistance, and the metal has high strength and strong anti-fouling properties, and there is an interlayer space between the outer shell 11 and the inner shell 12, the interlayer space forms a temperature control chamber 7, a part of the temperature control chamber 7 is located in the top space of the inner shell 12 to form a top surface cavity, and a plurality of doorways are opened on the shell 1, the doorways penetrate the inner shell 12 and the outer shell 11 and are communicated with the purification chamber 5, and the purification mechanism 6 in the purification chamber 5 can be operated through the doorways. , so as to facilitate maintenance and replacement of the purification mechanism 6, each doorway is sealed with sealing plates on all four sides, and the sealing plates are welded at the edges of the inner shell 12 and the outer shell 11, and the sealing plates are steel plates. A single-opening door 13 is arranged in each doorway, and the single-opening door 13 is hinged on one of the sealing plates. A sealing pad is attached to the outer edge of the single-opening door 13 to improve the sealing of the single-opening door 13. The other part of the temperature control cavity 7 is arranged on one side of the shell 1 in the length direction to form a side cavity, specifically, it is located between the outer shell 11 and the inner shell 12 on the other side opposite to the doorway, and the top cavity and the side cavity are communicated with each other. The two ends of the shell 1 are respectively provided with an air inlet 3 and an air outlet 4 communicated with the purification chamber 5, the air inlet 3 is connected to the exhaust gas source through a pipe, and the air outlet 4 is connected to the exhaust chimney through a pipe, and the pipes are connected to the flat flange.

[0020] like Figure 1 , Figure 3As shown, a plurality of purification mechanisms 6 are arranged symmetrically and at intervals in the purification chamber 5, and the purification chamber 5 between two adjacent purification mechanisms 6 forms an oxidation zone 51, each purification mechanism 6 includes a light generating device 61 and a photocatalyst device 62, and the purification mechanisms 6 are sequentially installed in parallel in the purification chamber 5, and the exhaust gas enters the purification chamber 5 from the air inlet 3, then passes through the plurality of purification mechanisms 6 and the oxidation zone 51 in sequence, and is finally discharged from the air outlet 4; specifically, the light generating device 61 is composed of a first carrier plate 611, a light generating device 61 installed on the first carrier plate 61 1, the ultraviolet lamp 612 is mounted on the side of the first carrier plate 611 facing the photocatalyst device 62, and multiple ultraviolet lamps 612 can be arranged from top to bottom. In the technical solution, two are preferably arranged, and each ultraviolet lamp 612 can generate a wavelength of 154-184.9nm, a photon energy corresponding to 1200KJ / mol-600KJ / mol, and an ultraviolet dose of 45mw / c㎡; the photocatalyst device 62 is composed of a second carrier plate 621, a first carrier plate 621, and a second carrier plate 621. The catalyst plate 622 on the first carrier plate 621 is composed of a plurality of bearing grooves 623 arranged from bottom to top on the side opposite to the ultraviolet lamp tube 612, and a catalyst plate 622 is placed in each bearing groove 623. The first carrier plate 611 and the second carrier plate 621 are both slidably connected to the bottom surface of the purification chamber 5. The ultraviolet lamp tube 612 and the catalyst plate 622 relative to each other can maximize the contact time and contact area between the ultraviolet light and the catalyst. At least a part of the first carrier plate 611 is a mesh plate 613, which is convenient for exhaust gas The exhaust gas enters the purification chamber 5, and is extracted by the exhaust chimney. The exhaust gas flows in a predetermined direction. Based on this, after the exhaust gas enters the purification chamber 5, it first passes through the first supporting plate 611, and then the exhaust gas needs to flow through the air holes 624 on the second supporting plate 621. This setting slows down the circulation speed of the exhaust gas, and increases the residence time of the exhaust gas between the first supporting plate 611 and the second supporting plate 621. The residence time of the exhaust gas here is not less than four seconds, which increases the contact opportunity and contact time between high-energy particles and pollutant factors, and improves the purification effect.

[0021] like Figure 4 As shown, the catalyst plate 622 is a rectangular plate, and the surface of the catalyst plate 622 is a honeycomb structure with a plurality of honeycomb holes 6221. The nano-scale titanium dioxide solution is evenly sprayed on the honeycomb structure of the catalyst plate 622, and then dried and cured. Specifically, the spraying and drying are repeated 5 times to form a catalyst layer. The catalyst layer is cured by vacuum curing technology, and then baked at high temperature to make the catalyst layer in a sintered state and three-dimensional concave-convex. The specific surface area of ​​the catalyst layer is increased while curing. The nano-powder fineness of the titanium dioxide coating is 5nm.

[0022] like Figure 1 , Figure 2 , Figure 3As shown, a refrigeration component is arranged in the temperature control chamber 7, and the refrigeration component includes a heat dissipation fan and a bracket. The heat dissipation fan is fixed to the inner wall of the outer shell 11 through the bracket, and its air outlet faces the inner shell 12. At least two refrigeration components are arranged in the side cavity in the temperature control chamber 7 at intervals. The air cooling effect of the heat dissipation fan is used to control the temperature of the purification chamber 5 in the inner shell 12, so that the temperature in the purification chamber 5 is not higher than 60°C. The temperature in the purification chamber 5 is monitored by a temperature sensor. The control board 2 arranged on the outer shell 11 is used to control the switch of the ultraviolet lamp 612 and the heat dissipation fan. The control board 2 is a control circuit disclosed in the prior art. The vent 14 arranged on the outer shell 11 is used to exchange air between the temperature control chamber 7 and the outside. An arc-shaped rain shield is provided above each vent 14. The rain shield is used to prevent rainwater from entering when the equipment is installed in an open air environment.

[0023] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A printing and dyeing waste gas purification system, comprising a semi-enclosed housing (1), wherein the housing (1) has a purification chamber (5), characterized in that: The purification chamber (5) is provided with a plurality of purification mechanisms (6) which are symmetrically and spaced apart. The purification chamber (5) between two adjacent purification mechanisms (6) forms an oxidation zone (51). The residence time of the waste gas in the oxidation zone (51) is not less than four seconds. Each of the purification mechanisms (6) comprises a light generating device (61) and a photocatalyst device (62). The light generating device comprises an ultraviolet lamp. The wavelength generated by the ultraviolet lamp is 154-184.9 nm, the corresponding photon energy is 1200 KJ / mol-600 KJ / mol, and the ultraviolet dose is 45 mw / cm2.

2. A printing and dyeing waste gas purification system according to claim 1, characterized in that: The light generating device (61) further comprises a first supporting plate (611), the ultraviolet lamp tube (612) being detachably mounted on the first supporting plate (611), at least one ultraviolet lamp tube (612) being provided, the ultraviolet lamp tube (612) facing the photocatalyst device (62), the photocatalyst device (62) comprising a second supporting plate (621) and a catalyst plate (622), a surface of the second supporting plate (621) facing the ultraviolet lamp tube (612) being provided with a plurality of supporting grooves (623) in sequence from bottom to top, the catalyst plate (622) being arranged in the supporting grooves (623), and the supporting grooves (623) corresponding to the catalyst plates (622) one by one.

3. A printing and dyeing waste gas purification system according to claim 2, characterized in that: The catalyst plate (622) is made of a high molecular polymer material, and a catalyst layer is evenly sprayed on the catalyst plate (622), and the catalyst layer includes 1-5 layers. A plurality of pores (624) are opened on the second supporting plate (621) between two adjacent supporting grooves (623), and the pores (624) are used for the exhaust gas to circulate in the purification chamber (5).

4. A printing and dyeing waste gas purification system according to claim 3, characterized in that: The catalyst plate (622) has a honeycomb structure, and a plurality of honeycomb holes (6221) are provided on the plate surface of the catalyst plate (622). At least a portion of the catalyst layer is sprayed on the inner side of the honeycomb hole (6221). The catalyst layer is a nano-grade titanium dioxide coating, and the nano-powder fineness of the titanium dioxide coating is 5-15 nm.

5. A printing and dyeing waste gas purification system according to claim 1, characterized in that: An air inlet (3) and an air outlet (4) are respectively provided at opposite ends of the shell (1), and the air inlet (3) and the air outlet (4) are both provided with flat flanges. A control panel (2) is also fixed to the outer surface of the shell (1), and the control panel (2) is electrically connected to the purification mechanism (6).

6. A printing and dyeing waste gas purification system according to claim 5, characterized in that: The shell (1) comprises an outer shell (11) and an inner shell (12); the purification chamber (5) is arranged in the inner shell (12); an interlayer space is arranged between the outer shell (11) and the inner shell (12); the interlayer space surrounds the periphery of the inner shell (12); the interlayer space forms a temperature control chamber (7); a part of the temperature control chamber (7) is located in the top space of the inner shell (12) to form a top surface cavity; another part of the temperature control chamber (7) is arranged on a side surface in the length direction of the shell (1) to form a side surface cavity; the top surface cavity and the side surface cavity are communicated; a refrigeration component is arranged in the temperature control chamber (7).

7. A printing and dyeing waste gas purification system according to claim 6, characterized in that: The refrigeration component is installed in the side cavity, the refrigeration component comprises a bracket and a heat dissipation fan, the heat dissipation fan is installed on the inner wall of the outer shell (11) through the bracket, the refrigeration component is provided with at least two refrigeration components, the refrigeration component is used to cool the purification chamber (5), a temperature sensor is provided in the purification chamber (5), the temperature sensor is electrically connected to the control board (2), the refrigeration component is electrically connected to the control board (2), and the control board (2) is arranged on the outer shell (11).

8. A printing and dyeing waste gas purification system according to claim 7, characterized in that: The outer shell (11) is also provided with a plurality of vents (14), which are used for exchanging air between the temperature control chamber (7) and the outside. An arc-shaped rain shield is provided above each vent (14).

9. A printing and dyeing waste gas purification system according to claim 1, characterized in that: The shell (1) is provided with a plurality of doorways, each of which passes through the outer shell (11) and the inner shell (12) and communicates with the purification chamber (5). The doorways are provided with a single-opening door (13), and a sealing plate is welded to the inner edge surface of the doorway. The single-opening door (13) is hinged to the sealing plate, and the single-opening door (13) corresponds to the purification mechanism (6) one by one.

10. A printing and dyeing waste gas purification system according to claim 9, characterized in that: The inner shell (12) is made of an oxidized aluminum plate, and the outer shell (11) is made of a stainless steel material. The thickness of the inner shell (12) is 3-8 mm. A plurality of support seats are also provided at the bottom of the shell (1), and the side surfaces of the support seats are provided with penetrating screw holes.

Images