Device for treating VOCs (volatile organic compounds) through photo-thermal concerted catalytic oxidation

Abstract

The utility model discloses photo-thermal concerted catalytic oxidation VOCs treatment equipment which comprises a furnace body, the furnace body is hollow to form a reaction cavity, the furnace body is provided with an air inlet and an air outlet which are communicated with the reaction cavity, and the reaction cavity comprises a heat exchange area, an electric heating area and a photo-thermal concerted catalytic oxidation area which are arranged at intervals; the heat exchange area is communicated with the air inlet, a plurality of vertical heat exchange pipes are arranged in the heat exchange area, and the heat exchange pipes are respectively communicated with the photo-thermal synergistic catalytic oxidation area and the air outlet; the electric heating area extends in the vertical direction, a plurality of heating assemblies are arranged in the electric heating area at intervals in the extending direction, and the upper end and the lower end of the electric heating area are communicated with the heat exchange area and the photo-thermal synergistic catalytic oxidation area correspondingly; a plurality of catalyst layers which are sequentially laid in the vertical direction are arranged in the photo-thermal synergistic catalytic oxidation zone, and each catalyst layer is provided with a photo-thermal synergistic catalyst and an ultraviolet lamp tube assembly. The utility model can solve the problems of large heat loss and low energy utilization rate of the existing photo-thermal concerted catalytic oxidation technology.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment, and particularly relates to a photothermal synergistic catalytic oxidation VOCs treatment device. Background Art

[0002] Volatile organic compounds (VOCs) are various organic compounds with a boiling point of 50°C to 260°C at room temperature. In my country, VOCs refer to organic compounds with a saturated vapor pressure greater than 70Pa at room temperature and a boiling point below 260°C at normal pressure, or all organic compounds with a vapor pressure greater than or equal to 10Pa at 20°C and volatility.

[0003] Traditional thermal catalytic oxidation equipment needs to heat organic waste gas to between 280 and 400°C, which consumes a lot of energy. Although traditional photocatalytic oxidation reaction equipment can use photon energy to purify VOCs under relatively mild conditions, due to the small effective treatment space of general photocatalytic reaction equipment, the residence time of polluted gas passing through the photocatalytic reaction equipment is short, the polluted gas cannot be completely purified by the reaction, and the oxidation and decomposition efficiency of the polluted gas is low, and most of it cannot be converted into carbon dioxide and water, thereby reducing the treatment efficiency of VOCs.

[0004] The existing photothermal synergistic catalytic technology can catalyze the catalyst through light energy and heat energy at a certain temperature, thereby catalyzing the oxidation of VOCs at a lower temperature with a stronger reaction efficiency, reducing energy consumption and improving the efficiency of VOCs treatment. However, the heat loss in the treatment process is large and the energy utilization rate is low. Utility Model Content

[0005] The utility model aims to provide a photothermal synergistic catalytic oxidation VOCs treatment equipment to solve the technical problems of large heat loss and low energy utilization rate in the photothermal synergistic catalytic oxidation technology in the prior art.

[0006] The technical solutions adopted to solve the above technical problems are:

[0007] The utility model discloses a photothermal synergistic catalytic oxidation VOCs treatment device, comprising a furnace body, the furnace body is hollow to form a reaction chamber, the furnace body is provided with an air inlet and an air outlet connected to the reaction chamber, the reaction chamber comprises a heat exchange zone, an electric heating zone and a photothermal synergistic catalytic oxidation zone which are separately arranged;

[0008] The heat exchange zone is connected to the air inlet, and a plurality of vertical heat exchange tubes are arranged in the heat exchange zone, and the heat exchange tubes are respectively connected to the photothermal synergistic catalytic oxidation zone and the air outlet;

[0009] The electric heating zone extends in the up-down direction, and a plurality of heating components are arranged at intervals along the extension direction of the electric heating zone, and the upper end and the lower end of the electric heating zone are respectively connected to the heat exchange zone and the photothermal synergistic catalytic oxidation zone;

[0010] The photothermal synergistic catalytic oxidation zone is provided with a plurality of catalyst layers sequentially laid in the up-and-down direction, and each catalyst layer is provided with an ultraviolet lamp tube assembly.

[0011] The utility model has at least the following beneficial effects: when VOCs enter the reaction chamber of the furnace body from the air inlet, they first pass through the heat exchange zone and then enter the electric heating zone to be heated so that the VOCs reach the reaction temperature range. After heating, the VOCs enter the photothermal synergistic catalytic oxidation zone from the electric heating zone. At this time, the ultraviolet lamp tube assembly emits ultraviolet light to excite the photothermal synergistic catalyst, so that the photothermal synergistic catalyst effectively absorbs light energy and converts it into active oxygen species or thermal energy. At the same time, the photothermal synergistic catalyst itself has good thermal catalytic performance, so that the VOCs undergo catalytic oxidation reaction and are converted into gaseous and clean carbon dioxide and water.

[0012] Compared with thermal catalytic oxidation reaction, the temperature required for VOCs catalytic oxidation reaction of photothermal synergistic catalytic oxidation VOCs treatment equipment is lower, reducing energy consumption. Compared with photocatalytic oxidation reaction, VOCs need to pass through several catalyst layers to reach the outlet, which prolongs the reaction time of VOCs and photothermal synergistic catalyst, and can ensure that VOCs react completely under the catalytic oxidation of photothermal synergistic catalyst, thereby improving the treatment efficiency of VOCs.

[0013] The converted reaction products, gaseous carbon dioxide and water, flow from the upper end of the photothermal synergistic catalytic oxidation zone to the air outlet through the heat exchange tubes. At this time, the VOCs airflow entering from the air inlet passes through multiple heat exchange tubes, and the VOCs airflow and the gaseous reaction products exchange heat through the wall of the heat exchange tubes to transfer the heat of the reaction products to the VOCs, thereby improving the heat utilization efficiency and reducing the energy consumption of several heating components in the electric heating area.

[0014] As a further improvement of the above technical solution, an air flow distribution plate is provided on the side of the heat exchange zone facing the air inlet.

[0015] Through the above arrangement, the airflow distribution plate can make the VOCs airflow flow evenly to the heat exchange area, ensuring uniform heat exchange between VOCs and multiple heat exchange tubes, so as to improve the heat exchange efficiency of VOCs.

[0016] As a further improvement of the above technical solution, a heat-insulating layer is provided in the reaction chamber, and the heat-insulating layer is laid on the inner wall surface of the furnace body corresponding to the electric heating zone and the photothermal synergistic catalytic oxidation zone.

[0017] Through the above-mentioned setting, since the electric heating zone heats the VOCs to the reaction temperature range, the photothermal synergistic catalytic oxidation zone needs to stimulate the thermal catalytic performance of the photothermal synergistic catalyst. Therefore, the insulation layer is laid on the inner wall surface of the furnace body corresponding to the electric heating zone and the photothermal synergistic catalytic oxidation zone to prevent heat from dissipating through the inner wall surface of the furnace body to the outer wall surface of the furnace body, causing heat loss.

[0018] As a further improvement of the above technical solution, a mounting plate extending up and down is provided in the electric heating zone, the mounting plate is connected to the furnace body, and the plurality of heating components are connected to the mounting plate.

[0019] Through the above arrangement, multiple heating components are connected to the electric heating zone through the mounting plate, which makes it convenient to directly connect the mounting plate to the electric heating zone after installing the multiple heating components, thereby avoiding that when the multiple heating components are directly connected to the electric heating zone, the connection structure between the heating components and the furnace body damages the insulation layer and affects the insulation effect of the insulation layer in the electric heating zone.

[0020] As a further improvement of the above technical solution, the heating assembly is a heating tube body and a fastening nut, the heating tube body is U-shaped, and the head end and the tail end of the heating tube body both pass through the mounting plate and are threadedly connected to the fastening nut.

[0021] Through the above arrangement, the U-shaped heating tube body has the characteristics of simple structure, high thermal efficiency, good mechanical strength, etc. The head and tail ends of the heating tube pass through the mounting plate and are connected with the fastening nuts to firmly connect the U-shaped heating tube body to the mounting plate.

[0022] As a further improvement of the above technical solution, a gas pretreatment component is provided below the catalyst layer located at the lowermost end.

[0023] Through the above arrangement, after entering the photothermal synergistic catalytic oxidation zone, VOCs first pass through the gas pretreatment component and then enter the catalyst layer upward. The gas pretreatment component is used to intercept solid impurities in the VOCs airflow to prevent the solid impurities from entering the catalyst layer.

[0024] As a further improvement of the above technical solution, the catalyst layer includes a support plate, the photothermal synergistic catalyst and the ultraviolet lamp tube assembly laid out in sequence from bottom to top, and the support plate is provided with a plurality of through holes that are connected up and down and evenly arranged.

[0025] Through the above arrangement, the support plate is used to support the photothermal synergistic catalyst, and the ultraviolet light tube assembly emits ultraviolet light to the photothermal synergistic catalyst to stimulate the photocatalytic reaction and thermal catalytic reaction of the photothermal synergistic catalyst. The evenly distributed through holes on the support plate can allow VOCs to evenly penetrate the catalyst layer from bottom to top, and complete the catalytic oxidation reaction of VOCs under the catalytic action of the photothermal synergistic catalyst.

[0026] As a further improvement of the above technical solution, the photothermal synergistic catalyst is connected to the ultraviolet lamp tube assembly in a horizontal direction.

[0027] Through the above arrangement, the ultraviolet lamp tube assembly is not only located above the photothermal synergistic catalyst, but also connected to the edge of the photothermal synergistic catalyst in the horizontal direction, so as to further improve the catalytic effect of the photothermal synergistic catalyst and improve the treatment efficiency of VOCs.

[0028] As a further improvement of the above technical solution, temperature sensors are provided at both ends of the electric heating zone connecting the heat exchange zone and the photothermal synergistic catalytic oxidation zone.

[0029] Through the above settings, two temperature sensors are respectively arranged at the inlet and outlet positions of the VOCs in the electric heating zone. The temperature sensors are used to collect the real-time temperature of the VOCs airflow, which is convenient for people to adjust the heating power of multiple heating components in real time, prevent overheating while ensuring the VOCs heating temperature, and reduce the power consumption required for heating.

[0030] As a further improvement of the above technical solution, the furnace body is provided with an inspection port, and the inspection port and the photothermal synergistic catalytic oxidation zone are horizontally connected.

[0031] The above arrangement makes it convenient for maintenance personnel to inspect or replace components such as the photothermal synergistic catalyst, ultraviolet light lamp assembly, etc. in the photothermal synergistic catalytic oxidation zone through the maintenance port. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0033] Figure 1 This is a schematic diagram of the overall structure of the photothermal synergistic catalytic oxidation VOCs treatment equipment provided by the embodiment of the utility model;

[0034] Figure 2 This is a schematic diagram of the overall structure of the photothermal synergistic catalytic oxidation VOCs treatment device provided by the embodiment of the utility model from another perspective;

[0035] Figure 3 is a front cross-sectional view of a furnace body provided by an embodiment of the utility model;

[0036] Figure 4 It is a front cross-sectional view of the photothermal synergistic catalytic oxidation VOCs treatment equipment provided in an embodiment of the utility model.

[0037] The following are marked in the accompanying drawings:

[0038] 100, furnace body; 110, air inlet; 120, air outlet; 130, inspection port;

[0039] 200, heat exchange area; 210, heat exchange tube; 220, heat exchange top baffle; 230, heat exchange bottom baffle; 240, connection hole;

[0040] 300, electric heating area; 310, mounting plate; 311, connecting bolt; 312, connecting nut; 320, heating assembly; 321, heating tube body; 322, fastening nut; 331, first temperature sensor; 332, second temperature sensor;

[0041] 400, photothermal synergistic catalytic oxidation zone; 410, support plate; 411, through hole; 412, mounting groove; 420, photothermal synergistic catalyst; 430, ultraviolet lamp assembly; 431, ultraviolet lamp; 440, gas pretreatment assembly; 450, third temperature sensor; 460, ultraviolet lamp electrical box;

[0042] 500, air flow distribution plate; 510, diversion hole;

[0043] 600, insulation layer;

[0044] 700. Partition baffle. DETAILED DESCRIPTION

[0045] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0046] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In the description of the utility model, if there is a word description such as "several", it means one or more, and the meaning of "more" is two or more. Greater than, less than, and more than are understood to exclude the number itself, and above, below, and within are understood to include the number itself. If there is a description of the first, second, and third, it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0048] It should be noted that in the attached drawings, the X direction is from the right side of the photothermal catalytic oxidation VOCs treatment equipment to the left side; the Y direction is from the back side of the photothermal catalytic oxidation VOCs treatment equipment to the front side; and the Z direction is from the bottom side of the photothermal catalytic oxidation VOCs treatment equipment to the top side.

[0049] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0050] Reference Figures 1 to 4 , several embodiments of the photothermal synergistic catalytic oxidation VOCs treatment equipment of the utility model are given below.

[0051] like Figures 1 to 4 As shown, the photothermal synergistic catalytic oxidation VOCs treatment device of the embodiment of the utility model includes a furnace body 100, the furnace body 100 is hollow to form a reaction chamber for treating volatile organic compounds (VOCs), and the furnace body 100 is provided with an air inlet 110, and the air inlet 110 is connected to the reaction chamber to introduce the VOCs to be treated into the reaction chamber. The furnace body 100 is also provided with an air outlet 120, and the air outlet 120 is connected to the reaction chamber to discharge the pollution-free products after treatment from the reaction chamber.

[0052] It is understandable that VOCs can be oxidized into non-toxic carbon dioxide and water through the photothermal synergistic catalytic oxidation technology. At this time, the carbon dioxide and water in the clean air flow can be discharged from the reaction chamber through the outlet 120.

[0053] In this embodiment, the furnace body 100 is a cube extending in the vertical direction, the horizontal direction, and the front-back direction. One end of the furnace body 100 connected to the air inlet 110 extends backward and gradually narrows into a trumpet shape to reduce the flow rate of the gas entering the reaction chamber and ensure that the gas is completely catalytically oxidized in the reaction chamber. One end of the furnace body 100 connected to the air outlet 120 extends upward and gradually narrows into a trumpet shape to guide the treated gas in the reaction chamber to be discharged from the air outlet 120.

[0054] In this embodiment, the reaction chamber includes a heat exchange zone 200, an electric heating zone 300, and a photothermal catalytic oxidation zone 400 which are separated and arranged. Specifically, the heat exchange zone 200 is connected to the air inlet 110, the electric heating zone 300 is connected to the heat exchange zone 200 and the photothermal catalytic oxidation zone 400 respectively, and the photothermal catalytic oxidation zone 400 is connected to the air outlet 120, and the connection between the two is arranged in the heat exchange zone 200, such as Figure 3 shown.

[0055] With such arrangement, the VOCs entering the reaction chamber preferentially enter the heat exchange zone 200, and then enter the electric heating zone 300 to be heated to the reaction temperature range, and then enter the photothermal synergistic catalytic oxidation zone 400 to be catalytically oxidized to form carbon dioxide and water. The carbon dioxide and water pass through the connection between the photothermal synergistic catalytic oxidation zone 400 and the gas outlet 120 and are discharged from the reaction chamber from the gas outlet 120. At this time, since the connection between the photothermal synergistic catalytic oxidation zone 400 and the gas outlet 120 is arranged in the heat exchange zone 200, the gaseous and high-temperature carbon dioxide and water exchange heat with the VOCs flowing through the heat exchange zone 200 when passing through the heat exchange zone 200, thereby increasing the temperature of the VOCs in the heat exchange zone 200, improving the thermal utilization efficiency of the furnace body 100, and reducing the heating energy consumption required for production.

[0056] It can be understood that the heat exchange zone 200 is located at the top of the furnace body 100 and extends in the horizontal direction. The left and right ends of the heat exchange zone 200 are respectively connected to the electric heating zone 300 and the air inlet 110, so that VOCs flow from right to left in the heat exchange zone 200 to the electric heating zone 300. Figure 3 and Figure 4 shown.

[0057] It can be understood that a plurality of heat exchange tubes 210 are provided in the heat exchange zone 200, and the heat exchange tubes 210 extend in the up-down direction, and the upper and lower ends of the heat exchange tubes 210 are respectively connected to the gas outlet 120 and the photothermal synergistic catalytic oxidation zone 400. Figure 4 Therefore, when VOCs flow into the heat exchange area 200, the VOCs passing through the plurality of heat exchange tubes 210 exchange heat with the tube wall of the heat exchange tube 210 and the high-temperature clean airflow flowing upward in the heat exchange tube 210, thereby increasing the temperature of the VOCs.

[0058] It can be understood that the upper end surface and the lower end surface of the heat exchange area 200 are respectively a heat exchange top baffle 220 and a heat exchange bottom baffle 230, and the heat exchange top baffle 220 and the heat exchange bottom baffle 230 are provided with upper and lower corresponding connecting holes 240, such as Figure 3 and Figure 4 The connecting hole 240 is matched with the outer tube wall of the heat exchange tube 210 , and the upper end and the lower end of the heat exchange tube 210 are both inserted and connected in the connecting hole 240 .

[0059] In this embodiment, the outer tube wall of the heat exchange tube 210 is welded and fixed to the hole wall of the connecting hole 240 so that the heat exchange tube 210 is sealed and connected to the heat exchange top baffle 220 and the heat exchange bottom baffle 230, thereby preventing untreated VOCs from flowing from the connecting hole 240 to the air outlet 120, and the clean airflow after catalytic oxidation enters the heat exchange zone 200 from the connecting hole 240, affecting the oxidation efficiency and oxidation effect of the photothermal synergistic catalytic oxidation VOCs treatment equipment.

[0060] In this embodiment, the plurality of heat exchange tubes 210 are arranged at intervals in the front-to-back direction and the left-to-right direction, so that the VOCs passing through the channels between the plurality of heat exchange tubes 210 in the heat exchange area 200 are evenly heat exchanged.

[0061] It can be understood that the electric heating zone 300 is located at the left part of the furnace body 100, and is located to the left of the heat exchange zone 200 and the photothermal catalytic oxidation zone 400. The electric heating zone 300 extends in the up-down direction, the upper end of the electric heating zone 300 is connected to the heat exchange zone 200, and the lower end of the electric heating zone 300 is connected to the photothermal catalytic oxidation zone 400, so that VOCs flow from top to bottom in the electric heating zone 300 to the photothermal catalytic oxidation zone 400, as shown in FIG. Figure 3 shown.

[0062] It can be understood that the electric heating zone 300 is provided with a plurality of heating components 320 at intervals along the extension direction, that is, the plurality of heating components 320 are arranged at intervals along the vertical direction, so that the VOCs are continuously heated by the plurality of heating components 320 during the downward flow, such as Figure 4 shown.

[0063] It can be understood that a partition baffle 700 is provided between the electric heating zone 300 and the photothermal catalytic oxidation zone 400, and the partition baffle 700 extends in the up-down direction and the front-back direction, and the lower end of the partition baffle 700 and the lower inner wall surface of the furnace body 100 are arranged at a distance to form a conduction point between the electric heating zone 300 and the photothermal catalytic oxidation zone 400, such as Figure 3 and Figure 4 shown.

[0064] In this embodiment, the heat exchange tube 210 located on the far left and the partition baffle 700 are opposite to each other up and down, so as to surround the left inner wall surface of the reaction chamber, the upper inner wall surface of the left end and the lower inner wall surface of the left end to form an electric heating zone 300 extending up and down, such as Figure 3 shown.

[0065] It can be understood that the photothermal synergistic catalytic oxidation zone 400 is located at the bottom of the furnace body 100 and below the heat exchange zone 200. In this embodiment, the photothermal synergistic catalytic oxidation zone 400 is formed by surrounding the heat exchange bottom baffle 230, the partition baffle 700, the right inner wall surface of the reaction chamber and the lower inner wall surface of the right end, as shown in FIG. Figure 3 and Figure 4 shown.

[0066] It can be understood that a catalyst layer is provided in the photothermal catalytic oxidation zone 400, and a plurality of catalyst layers are provided and laid sequentially in the up-down direction, and each catalyst layer is provided with an ultraviolet lamp assembly 430, and the ultraviolet lamp assembly 430 is used to irradiate the catalyst to achieve photocatalytic activation, such as Figure 4 shown.

[0067] With such arrangement, when the heated VOCs enter the photothermal synergistic catalytic oxidation zone 400, the VOCs contact each catalyst layer respectively during the upward flow. At this time, the ultraviolet lamp tube assembly 430 realizes photocatalytic activation of the catalyst and stimulates the thermal catalytic performance of the catalyst, thereby realizing the photothermal synergistic catalytic effect of the catalyst and oxidizing the VOCs into carbon dioxide and water.

[0068] It can be understood that the photothermal synergistic catalytic oxidation VOCs treatment equipment adopts photothermal synergistic catalytic oxidation technology, which has a relatively lower reaction temperature range compared to traditional thermal catalytic reactions, reducing energy consumption; at the same time, it uses electric heating to provide initial reaction power for the catalytic oxidation reaction, and uses ultraviolet light to excite the catalyst to produce a photothermal synergistic catalytic oxidation effect, thereby enhancing the reaction efficiency to obtain a better catalytic oxidation effect than using photocatalysis or thermal catalysis alone, thereby improving the VOCs treatment efficiency and overcoming the problems of low treatment efficiency caused by using photocatalytic oxidation alone.

[0069] In this embodiment, the reaction temperature range does not exceed 200 degrees Celsius.

[0070] Furthermore, an air flow distribution plate 500 is provided on one side of the heat exchange area 200 facing the air inlet 110. Figure 3 and Figure 4 As shown, the VOCs entering from the air inlet 110 are evenly distributed to avoid the VOCs being unable to evenly exchange heat with the multiple evenly arranged heat exchange tubes 210, resulting in reduced heat recovery efficiency.

[0071] It can be understood that the air flow distribution plate 500 is provided with a plurality of diverter holes 510 that are connected to the left and right, and the plurality of diverter holes 510 are evenly spaced in the up-down direction and the front-back direction, such as Figure 3 shown.

[0072] Furthermore, a heat preservation layer 600 is provided in the reaction chamber, such as Figure 3 and Figure 4 As shown, the heated VOCs are prevented from exchanging heat with the inner wall of the furnace body 100, thereby avoiding the problem of heat dissipation through the wall of the furnace body 100, the temperature of the VOCs being reduced, and the VOCs being unable to reach the reaction temperature range of the catalyst.

[0073] It is understandable that, since the electric heat exchange area 200 and the photothermal catalytic oxidation area 400 need to be formed by surrounding the inner wall surface of the furnace body 100, the insulation layer 600 is provided in the electric heating area 300 and the photothermal catalytic oxidation area 400. Figure 3 and Figure 4 shown.

[0074] In this embodiment, the insulation layer 600 is laid on the left inner wall surface of the reaction chamber, the upper inner wall surface at the left end, and the lower inner wall surface at the left end to reduce the heat loss of VOCs in the electric heating zone 300. The insulation layer 600 is also laid on the right inner wall surface of the reaction chamber and the lower inner wall surface at the right end to reduce the heat loss of VOCs in the photothermal synergistic catalytic oxidation zone 400. Moreover, the insulation layer 600 laid on the lower inner wall surface at the left end is connected to the insulation layer 600 laid on the lower inner wall surface at the right end, so that the insulation layer 600 laid on the lower inner wall surface of the reaction chamber is integrally formed, further reducing the heat loss of VOCs.

[0075] Furthermore, the thermal insulation layer 600 is also laid on the front inner wall and the rear inner wall of the reaction chamber to improve the thermal insulation performance of the furnace body 100 .

[0076] In this embodiment, the thermal insulation layer 600 is a ceramic fiber with a thickness of 200 mm.

[0077] It can be understood that a plurality of heating components 320 are provided in the electric heating zone 300 and are spaced apart in the vertical direction. Since the heating components 320 need to be powered on to generate heat, the heating components 320 are connected to the left inner wall of the furnace body 100 to facilitate power supply to the power supply device outside the furnace body 100.

[0078] In some embodiments, the heating component 320 directly passes through the insulation layer 600 and is connected to the left inner wall of the furnace body 100. However, the heating component 320 is provided with multiple insulation layers 600 laid on the left inner wall of the reaction chamber. Due to the installation of multiple heating components 320, it is easy for the insulation layer 600 to be pierced with multiple holes, resulting in reduced insulation effect.

[0079] In this regard, in this embodiment, a mounting plate 310 is provided in the electric heating area 300, and the mounting plate 310 extends in the up-down direction. Figure 4 As shown. The mounting plate 310 is used to connect multiple heating components 320. The mounting plate 310 passes through the insulation layer 600 and is connected to the left inner wall of the reaction chamber. Specifically, the mounting plate 310 and the left inner wall of the reaction chamber are connected by bolting. The connecting bolt 311 passes through the mounting plate 310, the insulation layer 600 and the left inner wall of the reaction chamber from right to left in sequence, and is threadedly connected and fixed with the connecting nut 312 on the left outer wall of the reaction chamber, as shown. Figure 4 shown.

[0080] With such a configuration, a plurality of heating components 320 can be directly connected to the mounting plate 310, and the mounting plate 310 can be firmly connected to the furnace body 100 through a relatively small number of connecting bolts 311 and connecting nuts 312. At this time, the thermal insulation layer 600 has only a relatively small number of holes through which the connecting bolts 311 pass, thereby ensuring the thermal insulation function of the thermal insulation layer 600. In this embodiment, the mounting plate 310 is connected to the furnace body 100 through four groups of connecting bolts 311 and connecting nuts 312 that are symmetrical in two groups up and down and in two groups front and back, so that the mounting plate 310 is firmly and stably connected. At this time, the thermal insulation layer 600 has only four holes through which the four connecting bolts 311 pass.

[0081] In this embodiment, each heating assembly 320 includes a heating tube body 321 and two fastening nuts 322. Figure 4 As shown. Specifically, the mounting plate 310 is provided with a plurality of groups of mounting holes arranged at intervals, each group of mounting holes corresponds to each heating component 320 one by one, and each is provided with two mounting holes. The heating tube body 321 is a U-shaped tube, the head end and the tail end of the heating tube body 321 are parallel to each other and are provided with external threads adapted to the fastening nut 322, the head end and the tail end of the heating tube body 321 correspond to each other up and down, and pass through the mounting hole from right to left, the head end and the tail end of the heating tube body 321 with external threads are threadedly connected to the fastening nut 322 on the left side of the mounting plate 310, so as to realize a stable connection between the heating component 320 and the mounting plate 310.

[0082] In this embodiment, two temperature sensors are provided in the electric heating area 300, including a first temperature sensor 331 and a second temperature sensor 332. Figure 1 and Figure 4 shown.

[0083] Among them, the first temperature sensor 331 is arranged at the upper end of the electric heating zone 300. Since the upper end of the electric heating zone 300 is connected to the heat exchange zone 200, the first temperature sensor 331 can detect the airflow temperature of VOCs flowing from the heat exchange zone 200 into the electric heating zone 300 in real time. The second temperature sensor 332 is arranged at the lower end of the electric heating zone 300. Since the lower end of the electric heating zone 300 is connected to the photothermal synergistic catalytic oxidation zone 400, the second temperature sensor 332 can detect the airflow temperature of VOCs flowing from the electric heating zone 300 into the photothermal synergistic catalytic oxidation zone 400 in real time.

[0084] With such arrangement, through the first temperature sensor 331 and the second temperature sensor 332, people can adjust the heating power of the electric heating zone 300 in real time through the programmable logic controller (PLC), thereby preventing overheating while ensuring that VOCs can reach the reaction temperature range, thereby reducing the power consumption required for heating.

[0085] It is understandable that a gas pretreatment component 440 is provided in the photothermal catalytic oxidation zone 400, and the gas pretreatment component 440 is located below the lowest catalyst layer, such as Figure 4 The gas pre-treatment component 440 is used to intercept solid impurities in the gas flow to prevent the solid impurities from entering the catalyst layer along with the VOCs in the gas flow.

[0086] In this embodiment, the left end of the gas pre-treatment component 440 is connected to the partition baffle 700, and the right end, front end and rear end of the gas pre-treatment component 440 are respectively connected to the inner side wall of the reaction chamber in the corresponding direction. The lower end surface of the gas pre-treatment component 440 and the lower end surface of the partition baffle 700 are in the same horizontal plane.

[0087] It is understandable that the gas pre-treatment component 440 intercepts solid impurities in the airflow by physical filtering, and the gas pre-treatment component 440 can be a filter, filter cotton or activated carbon. In this embodiment, the gas pre-treatment component 440 is a dry filter cotton.

[0088] In this embodiment, each catalyst layer includes a support plate 410, a photothermal synergistic catalyst 420 and an ultraviolet lamp assembly 430 which are sequentially laid from bottom to top. Figure 4 As shown. The support plate 410 is respectively connected to the partition baffle 700, the insulation layer 600 and the inner wall of the reaction chamber to stably support the photothermal synergistic catalyst 420 and the ultraviolet light tube assembly 430. The ultraviolet light tube assembly 430 is used to irradiate the photothermal synergistic catalyst 420 with ultraviolet light, and irradiate the photothermal synergistic catalyst 420 with ultraviolet light to achieve photocatalytic activation, so that the photothermal synergistic catalyst 420 effectively absorbs light energy and converts it into active oxygen species or heat energy.

[0089] It can be understood that the support plate 410 is provided with a plurality of through holes 411, and the through holes 411 are connected up and down. Figure 4 As shown, the VOCs flowing into the photothermal synergistic catalytic oxidation zone 400 can flow upward to the photothermal synergistic catalyst 420 through the through hole 411 after passing through the gas pretreatment component 440, so that the VOCs are catalytically oxidized into carbon dioxide and water by the photothermal synergistic catalyst 420 irradiated with ultraviolet light. A plurality of through holes 411 are evenly arranged to evenly distribute the VOCs gas flow and improve the catalytic oxidation efficiency of VOCs and the photothermal synergistic catalyst 420.

[0090] Furthermore, the photothermal synergistic catalyst 420 is horizontally connected to an ultraviolet lamp assembly 430, such as Figure 4As shown, the photothermal synergistic catalyst 420 is further irradiated with ultraviolet light to improve the treatment efficiency of VOCs. Specifically, the upper end surface of the support plate 410 is provided with a mounting groove 412 along its edge, and the ultraviolet light tube assembly 430 arranged in the horizontal direction of the photothermal synergistic catalyst 420 is vertically arranged, with its lower end clamped in the mounting groove 412, and the upper end connected to the ultraviolet light tube assembly 430 located on the top of the photothermal synergistic catalyst 420.

[0091] In some embodiments, the left and right ends of the photothermal synergistic catalyst 420 are both provided with ultraviolet lamp tube assemblies 430 , so that the ultraviolet lamp tube assembly 430 of each catalyst layer is in an inverted shape.

[0092] In other embodiments, the left end, right end, front end and rear end of the photothermal synergistic catalyst 420 are each provided with a vertically extending ultraviolet lamp tube assembly 430, and correspondingly, the upper end surface of the support plate 410 is provided with mounting grooves 412 along the edges of its left end, right end, front end and rear end, so that the ultraviolet lamp tube assembly 430 of each catalyst layer is in a box shape with the opening facing downward, so as to irradiate the photothermal synergistic catalyst 420 in all directions.

[0093] In this embodiment, the uppermost catalyst layer is provided with a third temperature sensor 450, such as Figure 2 and Figure 4 As shown, it is used to monitor the temperature of the outlet airflow of the photothermal synergistic catalytic oxidation zone 400 to avoid long-term treatment of VOCs causing excessive temperature in the photothermal synergistic catalytic oxidation zone 400 and causing energy loss.

[0094] It can be understood that the first temperature sensor 331 , the second temperature sensor 332 and the third temperature sensor 450 are all thermocouple temperature sensors.

[0095] It can be understood that each ultraviolet lamp assembly 430 includes two lamp panels, two guard plates, a plurality of ultraviolet lamp tubes 431 and a plurality of guard strips. The opposite ends of each lamp panel are respectively welded and fixed to the two guard plates, so that the two lamp panels and the two guard plates are connected to form a conductive rectangular cavity; a plurality of ultraviolet lamp tubes 431 are equidistantly laid in the rectangular cavity, and the opposite ends of the ultraviolet lamp tubes 431 are respectively connected to the two lamp panels to fasten the ultraviolet lamp tubes 431, and the ultraviolet lamp tubes 431 and the guard plates are parallel to each other; a plurality of guard strips are symmetrically arranged along the conductive direction of the rectangular cavity, and are respectively arranged on both sides of the ultraviolet lamp tubes 431; a plurality of guard strips located on one side of the ultraviolet lamp tubes 431 are cross-connected to protect the ultraviolet lamp tubes 431 from being squeezed and damaged.

[0096] It is understandable that one of the lamp panels is provided with wires, which are used to connect the UV lamp box 460 and all the UV lamps 431 to supply power to all the UV lamps 431. In this embodiment, the UV lamp box 460 is disposed on the rear outer wall of the furnace body 100, such as Figure 2 All the ultraviolet lamp tubes 431 are laid out in a forward and backward direction. Figure 4 shown.

[0097] It can be understood that in two adjacent catalyst layers, the ultraviolet lamp tube assembly 430 located below is connected to the support plate 410 located above, so that multiple catalyst layers are stacked and connected, thereby improving the space utilization of the photothermal synergistic catalytic oxidation zone 400 in the up and down directions.

[0098] In this embodiment, the furnace body 100 is provided with an inspection port 130 horizontally connected to the photothermal catalytic oxidation zone 400. Figure 1 Maintenance personnel can inspect or replace all components and structures in the photothermal catalytic oxidation zone 400 through the inspection port 130, such as the photothermal catalytic catalyst 420, the ultraviolet light tube assembly 430, the gas pretreatment assembly 440, the third temperature sensor 450, the support plate 410, etc.

[0099] It is understandable that the inspection port 130 is connected to the front wall of the furnace body 100, and the inspection port 130 is sealed with an inspection cover to prevent VOCs from escaping from the gap between the inspection port 130 and the inspection cover during treatment.

[0100] In this embodiment, the photothermal synergistic catalyst 420 has strong ultraviolet spectrum response capability, can effectively convert absorbed photon energy into active oxidizing species and thermal energy, has good thermal catalytic performance, etc. The photothermal synergistic catalyst 420 includes all catalysts with both photocatalytic and thermal catalytic performance.

[0101] In some embodiments, the photothermal synergistic catalyst 420 is composed of a transition metal oxide having thermal catalytic properties and a photocatalyst. The transition metal oxide may be cerium dioxide (CeO 2 ), cobalt tetraoxide (Co 3 O 4 ), manganese dioxide (MnO 2 ), etc., the photocatalyst can be titanium dioxide (TiO 2 ), cerium dioxide (CeO 2 ), silicon dioxide (SiO 2 ), etc., that is, the photothermal synergistic catalyst 420 can be TiO 2 / CeO 2 、Co 3 O 4 / TiO 2 、MnO x / TiO 2 .

[0102] In other embodiments, the photothermal synergistic catalyst 420 is composed of a precious metal and a photocatalyst. The precious metal may be platinum (Pt), gold (Au), silver (Ag), palladium (Pd), etc., and the photocatalyst may be titanium dioxide (TiO 2 ), cerium dioxide (CeO 2 ), silicon dioxide (SiO 2 ), etc., that is, the photothermal synergistic catalyst 420 can be Pt / TiO 2 、Pt / TiO 2 -SiO 2 、Pd / CeO 2 wait.

[0103] In this embodiment, the furnace body 100 can be a stainless steel furnace or a carbon steel furnace. The stainless steel furnace has the characteristics of strong corrosion resistance and good high temperature resistance, which can prevent VOCs from corroding the furnace body 100 and high temperature from causing the furnace body 100 to deform. The carbon steel furnace has the advantages of high strength, good hardness, and low cost, so as to reduce the cost of the photothermal synergistic catalytic oxidation VOCs treatment equipment.

[0104] The preferred implementation methods of the utility model are described in detail above, but the invention of the utility model is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the utility model. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A photothermal synergistic catalytic oxidation VOCs treatment equipment, characterized in that: The furnace body comprises a furnace body, the furnace body is hollow to form a reaction chamber, the furnace body is provided with an air inlet and an air outlet connected to the reaction chamber, and the reaction chamber comprises a heat exchange zone, an electric heating zone and a photothermal synergistic catalytic oxidation zone which are separately arranged; The heat exchange zone is connected to the air inlet, and a plurality of vertical heat exchange tubes are arranged in the heat exchange zone, and the heat exchange tubes are respectively connected to the photothermal synergistic catalytic oxidation zone and the air outlet; The electric heating zone extends in the up-down direction, and a plurality of heating components are arranged at intervals along the extension direction of the electric heating zone, and the upper end and the lower end of the electric heating zone are respectively connected to the heat exchange zone and the photothermal synergistic catalytic oxidation zone; The photothermal synergistic catalytic oxidation zone is provided with a plurality of catalyst layers sequentially laid in the up-down direction, and each catalyst layer is provided with a photothermal synergistic catalyst and an ultraviolet lamp tube assembly.

2. The photothermal synergistic catalytic oxidation VOCs treatment equipment according to claim 1 is characterized in that: An air flow distribution plate is provided on one side of the heat exchange area facing the air inlet.

3. The photothermal synergistic catalytic oxidation VOCs treatment equipment according to claim 1 is characterized in that: A heat-insulating layer is provided in the reaction chamber, and the heat-insulating layer is laid on the inner wall surface of the furnace body corresponding to the electric heating zone and the photothermal synergistic catalytic oxidation zone.

4. The photothermal synergistic catalytic oxidation VOCs treatment equipment according to claim 3 is characterized in that: A mounting plate extending up and down is arranged in the electric heating area, the mounting plate is connected to the furnace body, and a plurality of heating components are connected to the mounting plate.

5. The photothermal synergistic catalytic oxidation VOCs treatment equipment according to claim 4 is characterized in that: The heating assembly comprises a heating tube body and a fastening nut. The heating tube body is U-shaped. The head end and the tail end of the heating tube body both pass through the mounting plate and are threadedly connected with the fastening nut.

6. The photothermal synergistic catalytic oxidation VOCs treatment equipment according to claim 1 is characterized in that: A gas pretreatment component is provided below the catalyst layer at the lowest end.

7. The photothermal synergistic catalytic oxidation VOCs treatment equipment according to claim 1 is characterized in that: The catalyst layer includes a support plate, the photothermal synergistic catalyst and the ultraviolet lamp tube assembly which are laid out in sequence from bottom to top, and the support plate is provided with a plurality of through holes which are connected up and down and evenly arranged.

8. The photothermal synergistic catalytic oxidation VOCs treatment equipment according to claim 7 is characterized in that: The photothermal synergistic catalyst is connected to the ultraviolet lamp tube assembly in a horizontal direction.

9. The photothermal synergistic catalytic oxidation VOCs treatment equipment according to claim 1 is characterized in that: Temperature sensors are provided at both ends of the electric heating zone that conducts to the heat exchange zone and the photothermal synergistic catalytic oxidation zone.

10. The photothermal synergistic catalytic oxidation VOCs treatment equipment according to claim 1 is characterized in that: The furnace body is provided with an inspection port, and the inspection port is horizontally connected to the photothermal synergistic catalytic oxidation zone.

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