[0041] Example 1
[0042] refer to figure 1 , the treatment device used to treat waste gas containing dichloroethane includes a washing tower 17, a dry filter 20, an adsorption tower 1, a second adsorption tower 6 and an exhaust tube 25, and the adsorption tower 1 and the second adsorption tower 6 pass through a pipeline A condenser 14 is connected. The outlet of the condenser 14 is connected with a recovery pool 24 . The washing tower 17 is provided with a washing inlet 18. After the waste gas enters through the washing inlet 18, it undergoes washing, filtering, adsorption and other operations, and finally enters the atmosphere from the exhaust pipe 25. The dichloroethane in the exhaust gas passes through the adsorption tower 1 and the second adsorption tower 6, and finally condenses into a liquid state through the condenser 14, and flows into the recovery pool 24, which is convenient for the staff to recycle.
[0043] refer to figure 2The washing inlet 18 is located on the side wall of the washing tower 17 close to the ground, and the top of the washing tower 17 is provided with a washing outlet 52 . The washing tower 17 is vertically provided with two layers of horizontally arranged treatment components 27 , namely two-stage washing. The treatment components 27 include an alkaline packing layer 46 and several spray heads 19 . The basic packing layer 46 can react with the acidic substances in the exhaust gas to generate soluble salts and return them to the bottom of the washing tower 17 for preliminary filtration of the exhaust gas.
[0044] refer to figure 1 and figure 2 , a water pump 47 is placed on the ground, and the water inlet of the water pump 47 is connected with a pool 48 for storing the spray liquid through a pipeline. Sprinkler 19 supplies water.
[0045] refer to figure 2 , the nozzles 19 in each layer of processing components 27 are arranged in a horizontal straight line, and the nozzles 19 on the same horizontal line are evenly spaced. There are 3 shower heads 19 on the lower floor, 6 shower heads 19 on the upper floor, and the density of the shower heads 19 on the upper floor is higher than that of the lower floor. Under the same water pressure, spray nozzles 19 of different densities can produce different spray liquid pressures, thereby absorbing gases of different concentrations and improving the washing effect.
[0046] refer to figure 2 A horizontal demisting layer 49 is also fixed in the washing tower 17, the demistering layer 49 is positioned at the top of the washing tower 17 and below the washing outlet 52, and the demistering layer 49 can carry out the spraying liquid droplets entrained in the waste gas. clear.
[0047] refer to figure 1 and image 3 , The dry filter 20 is provided with a filter inlet 50 and a filter outlet 51, and the filter inlet 50 is connected with the washing outlet 52 of the washing tower 17 through a pipeline. The hinge on the side of the dry filter 20 is connected with a door. When the dry filter 20 is working, the door is closed to seal around the dry filter 20; when the inside of the dry filter 20 needs to be adjusted, the working Personnel can open the door.
[0048] refer to image 3 and Figure 4 , the inner top surface and the inner bottom surface of the dry filter 20 are provided with sliding grooves 33, the sliding grooves 33 are rectangular, and the openings of the two sliding grooves 33 are opposite. Bar-shaped baffles 53 are welded on the two opposite inner walls of the sliding groove 33, the length direction of the baffle 53 is parallel to the flow direction of the waste gas in the dry filter 20, and the lower surface of the baffle 53 is in contact with the sliding groove 33. There is a gap 54 between the bottom surfaces of the .
[0049] refer to image 3 and Figure 4 Each sliding groove 33 is slidably connected with two strip-shaped sliding blocks 32, the sliding blocks 32 can slide in the sliding groove 33 along the flow direction of the exhaust gas, and the two sliding blocks 32 opposite in the vertical direction As a group, there are two groups. The length direction of the sliding block 32 is perpendicular to the gas flow direction, and both ends of the sliding block 32 along the length direction are inserted into the gap 54 and abut against the inner sidewall of the sliding groove 33 . The baffle plate 53 is used to limit the position of the sliding block 32 to prevent the sliding block 32 from falling off.
[0050] refer to image 3 and Figure 4 The sliding block 32 is provided with a T-shaped slot 30 , the T-shaped slot 30 is located on the side of the sliding block 32 facing the other sliding block 32 , and the T-shaped slot 30 is arranged along the length direction of the sliding block 32 . A filter screen 22 is slidably connected to the T-shaped slot 30 , the filter screen 22 includes a frame 28 and a mesh surface 29 , and the frame 28 is arranged around the mesh surface 29 .
[0051] refer to Figure 4 and Figure 5 , the top and bottom surfaces of the frame 28 are provided with T-shaped protrusions 31, and the T-shaped protrusions 31 are slidably matched with the T-shaped slots 30. The staff can insert the filter screen 22 along the length of the T-shaped slots 30 relative to the sliding block 32 Or pull out, so as to realize the detachable connection of the filter screen 22 and the sliding block 32 .
[0052] refer to image 3 , the baffle plate 53 is provided with several threaded holes 34, the threaded holes 34 are evenly arranged at intervals along the length direction of the baffle plate 53, the threaded holes 34 are threaded with screws 23, and the screws 23 pass through the threaded holes 34 and are screwed with the sliding block 32 After the worker moves the filter screen 22 to a suitable position, the screw 23 is tightened in the corresponding threaded hole 34, thereby starting the fixing effect on the filter screen 22.
[0053] refer to image 3 The mesh surfaces 29 of the two sets of filter screens 22 are made of different materials, so that various dust and water mist in the exhaust gas can be captured to ensure the filtering effect.
[0054] refer to figure 1 and Image 6 , the adsorption tower 1 is provided with an air inlet 2 and an air outlet 3 for transmitting exhaust gas, and the second adsorption tower 6 is provided with a second air inlet 7 and a second air outlet 8 for transmitting exhaust gas, and a dry filter 20 The filter outlet 51 is connected with the air inlet 2 and the second air inlet 7 through a pipeline. Adsorbent is arranged in adsorption tower 1 and the second adsorption tower 6, and in the present embodiment, adsorbent is activated carbon and carbon fiber of honeycomb (referring to Figure 7 ). When the exhaust gas passes into the adsorption tower 1 and the second adsorption tower 6 along the pipeline, the adsorbent can absorb the dichloroethane in the exhaust gas, so that other gases in the exhaust gas are discharged from the gas outlet 3 and the second gas outlet 8 .
[0055] refer to figure 1 and Image 6 , the gas outlet 3 of the adsorption tower 1 and the second gas outlet 8 of the second adsorption tower 6 are connected with a fan 35 through a pipeline, the pipeline is provided with an exhaust valve 21, and the outlet of the fan 35 is connected with an exhaust tube 25 through a pipeline; The entrance of the fan 35 is also connected to the washing inlet 18 of the washing tower 17 through a pipeline, and the pipeline is provided with a circulation valve 45 . If the exhaust valve 21 is opened and the circulation valve 45 is closed, the treated gas can be discharged into the atmosphere from the exhaust cylinder 25 under the action of the blower fan 35; if the circulation valve 45 is opened and the exhaust valve 21 is closed, it can The treated gas is transported back to the scrubber 17 for a new round of purification treatment.
[0056] refer to Image 6 , the adsorption tower 1 is provided with a feed port 4 and a discharge port 5 for transporting the desorbent, and the second adsorption tower 6 is provided with a second feed port 9 and a second discharge port 10 for transporting the desorbent , The feed port 4 and the second feed port 9 are jointly connected with a heating device 11 through a pipeline. In this embodiment, the heating device 11 is an electric heating wire heating device, and the desorbent is nitrogen gas. The input port of the desorbent is connected to the inlet of the heating device 11 through a pipeline, and a heating valve 36 is provided on the pipeline. Opening the heating valve 36 can make the heated nitrogen flow in the adsorption tower 1 and the second adsorption tower 6, so that the temperature of the adsorbent can be raised, and the effect of dichloroethane desorption can be realized.
[0057] refer to Image 6 , the input port of the desorbent is also connected to the cooler 12 through the pipeline, the pipeline is connected to the cooling valve 26, the outlet of the cooler 12 is connected to the outlet of the heating device 11, if the temperature of the desorbent is too high, it can be closed Heating the valve 36 and opening the cooling valve 26 allows the desorbent to be cooled through the cooler 12 to reduce the temperature of the desorbent in time and reduce potential safety hazards.
[0058] refer to Image 6 , the air inlet 2 of the adsorption tower 1 is connected with an air inlet valve 37, the air outlet 3 of the adsorption tower 1 is connected with an air outlet valve 38, and the second air inlet 7 of the second adsorption tower 6 is connected with a second air inlet valve 39, The second gas outlet 8 of the second adsorption tower 6 is connected with a second gas outlet valve 40 . When the adsorption tower 1 adsorbed ethylene dichloride in the waste gas, the inlet valve 37 and the outlet valve 38 were opened, and the second inlet valve 39 and the second outlet valve 40 were closed, so that the adsorbent in the adsorption tower 1 was adsorbed .
[0059] refer to Image 6 , the feed port 4 of the adsorption tower 1 is connected with a feed valve 41, the discharge port 5 of the adsorption tower 1 is connected with a discharge valve 42, and the second feed port 9 of the second adsorption tower 6 is connected with a second feed valve 43. The second discharge port 10 of the second adsorption tower 6 is connected with a second discharge valve 44. When the adsorbent in the adsorption tower 1 is saturated, close the inlet valve 37 and the outlet valve 38 of the adsorption tower 1, open the second inlet valve 39 and the second outlet valve 40, so that the waste gas continues to enter the second adsorption tower 6 for adsorption ; Simultaneously open the feed valve 41 and the discharge valve 42, so that the heated nitrogen desorbs the ethylene dichloride in the adsorption tower 1. When the adsorbent in the second adsorption tower 6 is saturated, close the second inlet valve 39 and the second gas outlet valve 40, open the second feed valve 43 and the second discharge valve 44, to the second adsorption tower 6 The adsorbent is desorbed, so that the adsorption tower 1 and the second adsorption tower 6 work in turn, which ensures that there is no need to stop the waste gas during the transmission process, and improves the work efficiency.
[0060] In this embodiment, all the valves can be controlled by PLC. The adsorption tower 1 and the second adsorption tower 6 are provided with temperature sensors and pressure sensors, and the PLC can automatically open them through corresponding programs according to the values of the corresponding temperature sensors and pressure sensors. Or close the corresponding valve, eliminating the cumbersome manual operation.
[0061] The implementation principle of Embodiment 1 is as follows: the waste gas is first filtered and washed by the two-stage treatment unit 27 in the washing tower 17 to remove the acidic substances in the waste gas, and then enters the dry filter 20, and is filtered by the filter screen 22 to remove the dust in the waste gas and water mist, then reach the adsorption tower 1. The activated carbon and carbon fiber in the adsorption tower 1 adsorb the dichloroethane in the exhaust gas. When the adsorbent in the adsorption tower 1 absorbs the dichloroethane to saturation, it is switched to the second adsorption tower 6 through the opening and closing of the valve for further adsorption. The absorption of ethylene dichloride, in adsorption tower 1, pass into hot nitrogen, by the principle of desorption of temperature rise, adsorbent is desorbed, reclaim after condensing through condenser 14; When the ethylene dichloride in the second adsorption tower 6 When the adsorption is saturated, the exhaust gas is introduced into the adsorption tower 1 through the opening and closing of the valve again, and the hot nitrogen gas is passed into the second adsorption tower 2, so that the adsorption tower 1 and the second adsorption tower 6 work in turn, ensuring the working efficiency .
