Adsorption treatment device for harmful gas of waste electric appliances

Abstract

The utility model discloses a waste electric appliance harmful gas adsorption treatment device which comprises a bag-type dust collector, one end of the bag-type dust collector is connected with a gas inlet mechanism, the other end of the bag-type dust collector is connected with a purification box, one side in the purification box is provided with a pushing mechanism, one end of the pushing mechanism is provided with three composite adsorption boxes, and the other end of the pushing mechanism is provided with a gas outlet. A discharge tower is connected to one side of the purification box, three spiral guide plates are arranged in the discharge tower at equal intervals, and a mesoporous silica gel layer, a ZIF-modified activated carbon fiber layer and a bimetallic oxide catalyst layer are sequentially arranged at the upper ends of the three spiral guide plates from bottom to top. The utility model not only can increase the flow path and retention time of gas in the tower and improve the adsorption efficiency, but also can realize pre-separation of aerosol particles through centrifugal force and reduce the follow-up adsorbent blockage risk, can adapt to media with different concentrations and properties, can also reduce the activated carbon pore blockage risk, and improves the adsorption efficiency. And the purification sufficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas adsorption technical field especially relates to waste electrical and electronic equipment harmful gas adsorption treatment device. BACKGROUND

[0002] The processing activity of waste electrical and electronic equipment refers to the activity of disassembling waste electrical and electronic equipment, extracting materials therefrom as raw materials or fuels, reducing the number of waste electrical and electronic equipment generated by changing the physical and chemical properties of waste electrical and electronic equipment, reducing or eliminating harmful components thereof, and finally placing the waste electrical and electronic equipment in a landfill that meets environmental protection requirements. The activity does not include product maintenance, renovation, and reuse of old goods after maintenance and renovation. Currently, a large amount of harmful gas is generated during the disassembly of waste electrical and electronic equipment, and an adsorption purification device is usually set up on site for filtration.

[0003] However, the adsorption purification device set up on site at present has a simple structure and does not have a particulate matter separation module, which can easily cause the adsorbent to be blocked, the single-stage adsorption is easy to saturate, the purification rate of complex component waste gas is less than 85%, and the adsorption path is single, such as the patent with the application number CN201420260832.2, which adopts a two-stage bag-honeycomb plate series connection structure, and the nanoscale aerosol interception rate is insufficient. Therefore, we propose the waste electrical and electronic equipment harmful gas adsorption treatment device to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving the shortcomings in the prior art and provides a waste electrical and electronic equipment harmful gas adsorption treatment device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The waste electrical and electronic equipment harmful gas adsorption treatment device comprises a bag-type dust collector, one end of the bag-type dust collector is connected with an air inlet mechanism, the other end of the bag-type dust collector is connected with a purification tank, a pushing mechanism is installed on one side in the purification tank, three composite adsorption boxes are installed at one end of the pushing mechanism, a discharge tower is connected on one side of the purification tank, three spiral guide plates are arranged at equal intervals in the discharge tower, and a mesoporous silica gel layer, a ZIF-modified activated carbon fiber layer, and a double-metal oxide catalytic layer are sequentially arranged from bottom to top at the upper end of the three spiral guide plates.

[0007] Preferably, the air inlet mechanism comprises a fixing frame installed on one side of the bag-type dust collector, a gas conveying pump is installed on the fixing frame, a first air inlet channel is connected at one end of the gas conveying pump, the first air inlet channel is connected at one end on one side of the bag-type dust collector, a second air inlet channel is connected at the other end of the gas conveying pump, a connecting head is connected at one end of the second air inlet channel, and three air suction pipes are connected at equal intervals at one end of the connecting head.

[0008] Preferably, the pushing mechanism includes a mounting frame fixed to one side inside the purification box, a hydraulic cylinder mounted on the mounting frame, a connecting plate fixed to the end of the piston rod of the hydraulic cylinder, guide rods fixed to both sides of the connecting plate, one end of the guide rod penetrating the mounting frame, and mounting plates fixed to both the upper and lower ends of the connecting plate, with three composite adsorption boxes equally spaced on one side of two mounting plates.

[0009] Preferably, the composite adsorption box is composed of honeycomb activated carbon and zeolite molecular sieve.

[0010] Preferably, three support frames are fixed at equal intervals inside the emission tower, and the mesoporous silica gel layer, ZIF-modified activated carbon fiber layer and bimetallic oxide catalyst layer are respectively installed on the three support frames.

[0011] Preferably, the upper end of the emission tower is connected to an emission pipe.

[0012] In this invention, the exhaust gas is pre-treated by a bag filter after passing through an inlet mechanism, reducing the dust concentration from 200 mg / m³. 3 Reduced to 8 mg / m 3 The material is fed into the purification chamber, where it is purified by a composite adsorption box composed of honeycomb activated carbon and zeolite molecular sieves. It then enters the emission tower, ascending along a spiral guide plate. The bottom layer of mesoporous silica gel has a particle size of 3-5 mm and a specific surface area of ​​600 m². 2 / g, used to capture Hg vapor / PBDEs, the middle layer is a modified activated carbon fiber layer with a pore size of 0.8nm and an iodine value of 1100mg / g, targeting CFCs / benzene series compounds, the top layer is a bimetallic oxide catalytic layer with a thickness of 50μm, which can decompose dioxin-like substances, three-layer spiral guide plate with a pitch of 150mm and an inclination angle of 45°, extending the airflow residence time to 8s (2.5s in the traditional structure), and improving the adsorption efficiency to 98.7%. After three-stage adsorption, the VOCs concentration is reduced from 1500ppm to 35ppm, and then discharged from the emission pipe.

[0013] This utility model has the following advantages:

[0014] 1. The three-layer spiral guide plate is spirally distributed around the central axis of the tower, which can increase the flow path and residence time of the gas in the tower and improve the adsorption efficiency;

[0015] 2. The three-layer spiral guide plate forms a turbulence-enhanced gas path, which extends the airflow path by more than 3 times compared with the traditional linear adsorption tower. It achieves pre-separation of aerosol particles through centrifugal force, reducing the risk of subsequent adsorbent blockage.

[0016] 2. The three adsorption layers exhibit gradient changes in terms of adsorbent packing density, particle size, and activity. From the inlet to the outlet of the tower, the performance of the adsorbent gradually changes to adapt to media of different concentrations and properties, thereby achieving a more efficient adsorption process and fully adsorbing various types of gases.

[0017] 3. When honeycomb activated carbon and zeolite molecular sieve are combined, the coverage of waste gas treatment increases from 50% to over 95% compared to traditional single materials. The spiral flow guiding structure of the zeolite layer pre-separates particles larger than 5μm, reducing the risk of activated carbon pore blockage.

[0018] In summary, this invention not only increases the flow path and residence time of gas within the tower, thereby improving adsorption efficiency, but also enables pre-separation of aerosol particles through centrifugal force, reducing the risk of subsequent adsorbent blockage. Furthermore, it can adapt to media of different concentrations and properties, and also reduces the risk of activated carbon pore blockage, thus enhancing the adequacy of purification. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the present invention;

[0020] Figure 2 A structural diagram showing the pushing mechanism and composite adsorption box of this utility model;

[0021] Figure 3 This is a structural diagram of the pushing mechanism of this utility model;

[0022] Figure 4 This is a diagram showing the distribution structure of the three-layer adsorption layer of this utility model;

[0023] Figure 5 This is a structural diagram of the support frame of this utility model;

[0024] Figure 6 This is a diagram of the internal structure of the emission tower of this utility model.

[0025] In the diagram: 1. Discharge pipe, 2. Purification box, 3. Bag filter, 4. First air inlet channel, 5. Air pump, 6. Second air inlet channel, 7. Connector, 8. Suction pipe, 9. Discharge tower, 10. Mounting frame, 11. Mounting plate, 12. Connecting plate, 13. Composite adsorption box, 14. Hydraulic cylinder, 15. Guide rod, 16. Support frame, 17. Bimetallic oxide catalyst layer, 18. Modified activated carbon fiber layer, 19. Mesoporous silica gel layer, 20. Spiral guide plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Reference Figures 1-6 The waste electrical appliance hazardous gas adsorption and treatment device includes a bag filter 3. One end of the bag filter 3 is connected to an air inlet mechanism, which includes a fixed frame mounted on one side of the bag filter 3. An air pump 5 is mounted on the fixed frame. One end of the air pump 5 is connected to a first air inlet channel 4, which is also connected to one side of the bag filter 3. The other end of the air pump 5 is connected to a second air inlet channel 6. One end of the second air inlet channel 6 is connected to a connector 7, and three suction pipes 8 are evenly spaced at one end of the connector 7. This allows the adsorbed hazardous gases to be delivered into the bag filter 3. After pretreatment, the dust concentration is reduced from 200 mg / m³. 3 Reduced to 8 mg / m 3 ;

[0028] The other end of the bag filter 3 is connected to the purification box 2. A pushing mechanism is installed on one side of the purification box 2. The pushing mechanism includes a mounting frame 10 fixed on one side of the purification box 2. A hydraulic cylinder 14 is installed on the mounting frame 10. A connecting plate 12 is fixed to the end of the piston rod of the hydraulic cylinder 14. Guide rods 15 are fixed on both sides of the connecting plate 12. One end of the guide rod 15 passes through the mounting frame 10. Mounting plates 11 are fixed at both the upper and lower ends of the connecting plate 12. Three composite adsorption boxes 13 are installed at equal intervals on one side of two mounting plates 11. Through the setting of the hydraulic cylinder 14, the composite adsorption boxes 13 can be pushed out and put back in, realizing quick disassembly.

[0029] Three composite adsorption boxes 13 are installed at one end of the pushing mechanism. The composite adsorption box 13 is composed of honeycomb activated carbon and zeolite molecular sieve. The honeycomb activated carbon has a high adsorption capacity for non-polar VOCs (such as benzene series and Freon), while the zeolite molecular sieve has a selective adsorption advantage for polar gases (such as lead and mercury compounds and halogenated hydrocarbons). The coverage of waste gas treatment components is increased from 50% of traditional single materials to more than 95%.

[0030] A discharge tower 9 is connected to one side of the purification chamber 2. Three spiral guide plates 20 are evenly spaced inside the discharge tower 9. From bottom to top, the upper ends of the three spiral guide plates 20 are sequentially arranged with a mesoporous silica gel layer 19, a modified activated carbon fiber layer 18, and a bimetallic oxide catalytic layer 17. The mesoporous silica gel layer 19 uses mesoporous silica gel with a pore size of 5-10 nm as a carrier, loading nano-sized MnO2 particles (particle size 20-50 nm) to form a synergistic effect of chemical adsorption and catalysis. Its adsorption capacity for Hg vapor reaches 12.3 mg / g, which is 6 times that of ordinary activated carbon. Furthermore, MnO2 can remove Hg... 0 Oxidized to Hg 2+ Enhanced fixation effect, mesoporous structure provides 600m 2 With a high specific surface area of ​​ / g, the rejection rate of macromolecular pollutants such as PBDEs is increased to 95%;

[0031] Modified activated carbon fiber layer 18, through ZIF-8 metal-organic framework material to modify activated carbon fiber, forms a 0.8nm ultra-microporous structure, with a selective adsorption coefficient of 3.8 for CFCs, an iodine value of 1100mg / g, and a 40% increase in the adsorption rate of benzene series compounds. The hydrophobic properties of ZIF-8 enable the material to maintain 90% adsorption efficiency in an environment with 60% humidity.

[0032] The bimetallic oxide catalyst layer 17 uses La 0.8 Co 0.2 An O3 perovskite catalyst layer, 50 μm thick, is supported on a honeycomb ceramic substrate. It achieves a dioxin decomposition efficiency of >99% in the low temperature range of 250-350℃, which is 100℃ lower than the activity temperature of the traditional V2O5-WO3 catalyst. The La-Co synergistic effect can inhibit sulfur poisoning of the catalyst and extend its service life to 8000 hours. It is necessary to periodically introduce reducing gas to maintain catalytic activity.

[0033] Three support frames 16 are fixed at equal intervals inside the emission tower 9. The mesoporous silica gel layer 19, the modified activated carbon fiber layer 18, and the bimetallic oxide catalyst layer 17 are respectively installed on the three support frames 16. The upper end of the emission tower 9 is connected to the emission pipe 1. After three-stage adsorption, the VOCs concentration drops from 1500ppm to 35ppm and is released through the emission pipe 1.

[0034] In this invention, the exhaust gas is pre-treated by a bag filter 3 through an air intake mechanism, reducing the dust concentration from 200 mg / m³. 3 Reduced to 8 mg / m 3 The material is fed into purification chamber 2, purified by composite adsorption box 13 composed of honeycomb activated carbon and zeolite molecular sieve, and then enters emission tower 9, ascending along spiral guide plate 20. The bottom layer of mesoporous silica gel 19 has a particle size of 3-5mm and a specific surface area of ​​600m². 2 / g, used to capture Hg vapor / PBDEs, the middle layer is a modified activated carbon fiber layer 18 with a pore size of 0.8nm and an iodine value of 1100mg / g, targeting CFCs / benzene series compounds, the top layer is a bimetallic oxide catalytic layer 17 with a thickness of 50μm, which can decompose dioxin-like substances, a three-layer spiral guide plate with a pitch of 150mm and an inclination angle of 45°, the airflow residence time is extended to 8s (2.5s in the traditional structure), the adsorption efficiency is improved to 98.7%, and the VOCs concentration is reduced from 1500ppm to 35ppm after three-stage adsorption, and then discharged from the emission pipe 1.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A waste electrical appliance hazardous gas adsorption treatment device, including a bag filter (3), characterized in that, One end of the bag filter (3) is connected to an air inlet mechanism, and the other end of the bag filter (3) is connected to a purification box (2). A pushing mechanism is installed on one side of the purification box (2), and three composite adsorption boxes (13) are installed on one end of the pushing mechanism. An emission tower (9) is connected to one side of the purification box (2). Three spiral guide plates (20) are provided at equal intervals inside the emission tower (9). The upper end of the three spiral guide plates (20) is provided with a mesoporous silica gel layer (19), a modified activated carbon fiber layer (18), and a bimetallic oxide catalyst layer (17) from bottom to top.

2. The waste electrical appliance hazardous gas adsorption treatment device according to claim 1, characterized in that: The air intake mechanism includes a fixed frame installed on one side of the bag filter (3), an air pump (5) is installed on the fixed frame, one end of the air pump (5) is connected to a first air intake channel (4), one end of the first air intake channel (4) is connected to one side of the bag filter (3), the other end of the air pump (5) is connected to a second air intake channel (6), one end of the second air intake channel (6) is connected to a connector (7), and one end of the connector (7) is connected to three suction pipes (8) at equal intervals.

3. The waste electrical appliance hazardous gas adsorption treatment device according to claim 1, characterized in that: The pushing mechanism includes a mounting frame (10) fixed inside the purification box (2) on one side. A hydraulic cylinder (14) is mounted on the mounting frame (10). A connecting plate (12) is fixed to the end of the piston rod of the hydraulic cylinder (14). Guide rods (15) are fixed on both sides of the connecting plate (12). One end of the guide rod (15) passes through the mounting frame (10). Mounting plates (11) are fixed at both the upper and lower ends of the connecting plate (12). Three composite adsorption boxes (13) are installed at equal intervals on one side of two mounting plates (11).

4. The waste electrical appliance hazardous gas adsorption treatment device according to claim 1, characterized in that: The composite adsorption box (13) is composed of honeycomb activated carbon and zeolite molecular sieve.

5. The waste electrical appliance hazardous gas adsorption treatment device according to claim 1, characterized in that: The emission tower (9) is fixed with three support frames (16) at equal intervals. The mesoporous silica gel layer (19), the modified activated carbon fiber layer (18), and the bimetallic oxide catalyst layer (17) are respectively installed on the three support frames (16).

6. The waste electrical appliance hazardous gas adsorption treatment device according to claim 1, characterized in that: The upper end of the discharge tower (9) is connected to the discharge pipe (1).

Images