A multi-stage adsorption recovery treatment device and treatment process for chlorine-containing waste gas

Abstract

The invention discloses a multi-stage adsorption recovery and treatment device for chlorine-containing waste gas and a treatment process. The multi-stage adsorption recovery and treatment device for chlorine-containing waste gas comprises a tower body, a spray mechanism is provided on the tower body, the spray mechanism is a prior art, a treatment mechanism for conveying waste gas and collecting treated liquid is provided inside the tower body, a recovery mechanism for uniformizing edge spray is provided on the inner side and the upper side of the treatment mechanism, the recovery mechanism comprises two recovery rings distributed up and down and installed on the inner circumferential surface of the tower body, a secondary delivery component for dispersing edge spray is provided on the lower surface of the recovery ring, the first-level treatment uniformity is achieved by changing the exhaust gas outlet direction through the exhaust component, the second-level treatment uniformity is achieved by treating the waste liquid and the waste gas through the collecting component and transporting them in separate channels, the third-level uniformity is achieved by uniformly spraying the edge spray through the secondary delivery component, the three-level uniformity cooperates with each other, and the treatment effect of the chlorine-containing waste gas is better in the process of treating the chlorine-containing waste gas.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a multi-stage adsorption recovery treatment device and treatment process for chlorine-containing waste gas. Background Art

[0002] Liquid chlorine vaporization is used in the chlor-alkali industry to convert liquid chlorine into gas. Liquid chlorine vaporization is usually carried out in the gasification room through a liquid chlorine vaporizer. It is mainly used in chemical industry, papermaking, and metallurgy. In order to ensure production safety, a chlorine recovery and treatment device is usually installed in the gasification room to ensure production safety.

[0003] When chlorine leaks, the high-sensitivity detector installed in the gasification room automatically alarms, and the recovery and processing device automatically starts and is put into operation. The fan sends the chlorine leaked in the room into the reaction absorption tower, and the acid-resistant pump sends the alkali solution in the storage tank to the absorption tower. At this time, the chlorine flows from bottom to top, and the mist alkali solution sprays from top to bottom. The chlorine is fully contacted with the alkali solution through the countercurrent of the filler, and the chlorine is absorbed by the alkali solution.

[0004] However, the existing recycling and processing devices have the following disadvantages:

[0005] 1. The intake of chlorine-containing waste gas is uneven. Since fillers need to be placed inside the recovery and treatment device, the fillers are usually placed on the partition plate. Since chlorine needs to pass through the vents on the partition plate to contact the fillers and alkali solution, when the fillers are spread on the partition plate, some of the vents on the partition plate will be blocked by the fillers, resulting in uneven passage of chlorine-containing waste gas through the partition plate. The intake of chlorine-containing waste gas in some blocked positions is small. Since the alkali solution is sprayed evenly at various positions, the chlorine-containing waste gas in some positions will not be fully treated.

[0006] 2. The alkali liquid after the reaction at the top of the tower will re-contact with the treated chlorine-containing waste gas, causing secondary pollution. The alkali liquid after the reaction dripping downward will re-contact with the chlorine-containing waste gas that has undergone primary treatment, causing secondary pollution, affecting the treatment effect of the chlorine-containing waste gas.

[0007] 3. Part of the alkali liquid is not fully utilized. When the alkali liquid is sprayed inside the tower body, part of the alkali liquid will be sprayed directly on the inner wall of the tower body. The alkali liquid on the inner wall will flow downward along the inner wall, resulting in this part of the alkali liquid not being able to fully contact with the chlorine-containing waste gas, resulting in insufficient utilization of the alkali liquid, affecting the treatment effect and efficiency of the alkali liquid.

[0008] Therefore, in order to solve the above technical problems, the present invention provides a multi-stage adsorption recovery treatment device and treatment process for chlorine-containing waste gas. Summary of the Invention

[0009] A multi-stage adsorption recovery and treatment device for chlorine-containing waste gas includes a tower body, on which a spray mechanism is provided. The spray mechanism is a prior art. A treatment mechanism for conveying waste gas and collecting treated liquid is provided inside the tower body. Recovery mechanisms for uniformizing the edge spray are provided on the inner side and above the treatment mechanism.

[0010] The recovery mechanism includes two recovery rings distributed up and down and installed on the circumferential surface of the tower body. The recovery rings collect the alkali solution sprayed on the inner wall of the tower body. The lower surface of the recovery ring is provided with a secondary delivery part for dispersing the edge spray.

[0011] The treatment mechanism includes two upper and lower mounting plates installed on the circumferential surface of the tower body, and a collecting piece for transferring wastewater is commonly provided on the two mounting plates. A plurality of gas outlet pieces for conveying gas are evenly distributed on the upper surface of the mounting plates.

[0012] The exhaust gas outlet direction is changed by the exhaust piece to achieve uniform primary treatment, the waste liquid and exhaust gas are transported in separate channels by the collecting piece to achieve uniform secondary treatment, and the edge spraying is evenly sprayed by the secondary delivery piece to achieve uniform tertiary treatment.

[0013] According to an embodiment of the present invention, the recovery ring and the inner circumferential surface of the tower body jointly form a circular collection trough for collecting the alkali liquid sprayed on the inner wall of the tower body, and the alkali liquid is evenly dispersed into the interior of the tower body again through the secondary feeding member.

[0014] According to an embodiment of the present invention, the mounting plate is in the shape of a bottle cap, and a plurality of evenly distributed water drainage grooves are provided on the upper surface of the mounting plate, and a plurality of evenly distributed ventilation holes are provided on the upper surface of the mounting plate and on both sides of the water drainage grooves.

[0015] According to an embodiment of the present invention, the secondary delivery member includes a plurality of mounting tubes installed on the lower surface of the recovery ring and distributed in a circular array, the end of the mounting tube away from the recovery ring is connected to a liquid outlet nozzle, and the end of the liquid outlet nozzle away from the mounting tube is internally connected to a plurality of evenly distributed partition plates.

[0016] According to an embodiment of the present invention, the collecting piece includes a collecting box installed on the lower surface of the mounting plate, and the circumferential surfaces of the upper and lower mounting plates are commonly connected with a plurality of arc-shaped conveying pipes distributed in a circular array. The arc-shaped conveying pipes are hollow and open at the bottom.

[0017] According to an embodiment of the present invention, a side of the arc-shaped conveying pipe close to the mounting plate is connected to the circumferential surface of the arc-shaped conveying pipe through conveying pipe 1, the arc-shaped conveying pipe is embedded in the inner circumferential surface of the mounting plate, and the upper surface of the arc-shaped conveying pipe corresponding to the upper and lower water groove positions on the mounting plate are connected through conveying pipe 2.

[0018] According to an embodiment of the present invention, the air outlet component includes an air outlet pipe installed on the upper surface of the mounting plate and connected to the corresponding air vent positions, and a blocking component is provided at the air outlet hole of the air outlet pipe to block the air outlet hole with a blocking filler.

[0019] According to an embodiment of the present invention, a plurality of spoilers distributed vertically are connected to the interior of the vertical section of the air inlet in the middle of the air outlet pipe, and the plurality of spoilers are staggeredly arranged in the interior of the vertical section in the middle of the air outlet pipe.

[0020] According to an embodiment of the present invention, the diameter of the air inlet in the middle of the air outlet pipe is not larger than the diameter of the air outlet, and the flow velocity of the chlorine-containing waste gas is slowed down at the air outlet.

[0021] According to an embodiment of the present invention, a multi-stage adsorption recovery and treatment process for chlorine-containing waste gas is carried out in conjunction with a recovery and treatment device, and specifically includes the following steps:

[0022] S1. First, the chlorine-containing waste gas enters the interior of the tower, and the spraying mechanism starts to spray alkali solution.

[0023] S2. At this time, the chlorine-containing waste gas flows from bottom to top, and the alkali solution is sprayed from top to bottom, and the gas-liquid two-phase reverse phase flushing is carried out in conjunction with the filler on the installation plate to treat the chlorine-containing waste gas.

[0024] S3. During the treatment process, the chlorine-containing waste gas is fully separated from the filler by the installation plate, and the chlorine-containing waste gas is disturbed before contacting the filler to reduce the flow rate of the chlorine-containing waste gas and increase the contact time of the chlorine-containing waste gas with the alkali solution and the filler.

[0025] S4. At the same time, when the alkaline solution that absorbs chlorine gas drips downward during the treatment of chlorine-containing waste gas, the alkaline solution that absorbs chlorine gas in the upper layer is separated from the chlorine gas in the lower layer by the collecting piece.

[0026] S5. During the process of spraying alkali solution by the spraying mechanism, the alkali solution on the inner wall of the mounting plate is collected by the secondary delivery member and re-sprayed on the filler to improve the utilization rate of the alkali solution.

[0027] S6. The treated chlorine-containing waste gas becomes clean air and is discharged from the inside of the tower to the outside, thereby completing the purification of the chlorine-containing waste gas.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The exhaust gas outlet direction is changed by the exhaust part to achieve uniform primary treatment. The waste liquid and exhaust gas are transported through the collecting part in separate channels to achieve uniform secondary treatment. The edge spray is sprayed evenly by the secondary delivery part to achieve uniform third-level treatment. The three-level uniformity cooperates with each other, making the treatment effect of chlorine-containing waste gas better and improving the treatment efficiency in the process of treating chlorine-containing waste gas.

[0030] 2. The outlet direction of the chlorine-containing waste gas is changed by the outlet pipe and the spoiler is used to disturb the chlorine-containing waste gas, thereby increasing the contact time between the chlorine-containing waste gas and the filler and alkali solution, and improving the treatment effect of the chlorine-containing waste gas. At the same time, the setting of the blocking member can prevent the filler from blocking the outlet, ensuring the normal outlet of the chlorine-containing waste gas, so that the filler and alkali solution at each position can be utilized.

[0031] 3. The alkali liquid sprayed on the inner wall of the tower body is recovered through the recovery ring and then sprayed on the filler through the liquid outlet nozzle, so that the alkali liquid can be fully utilized to avoid the situation where some alkali liquid does not fully react with the chlorine-containing waste gas. At the same time, the recovered alkali liquid is divided into multiple streams and sprayed on the filler with the setting of multiple separators to ensure the uniformity of the secondary spraying of the alkali liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the present invention.

[0033] Figure 2 It is a schematic diagram of a partial cross section of the present invention.

[0034] Figure 3 It is a schematic diagram of the spray mechanism of the present invention.

[0035] Figure 4 Schematic diagram of the recovery mechanism of the present invention.

[0036] Figure 5 Schematic diagram of the processing mechanism of the present invention.

[0037] Figure 6 This is one of the shape distribution diagrams of the baffle bar of the present invention.

[0038] Figure 7 This is the second schematic diagram of the shape distribution of the baffle bar of the present invention.

[0039] Figure 8 Schematic diagram of the gas outlet component of the present invention.

[0040] Figure 9 This is one of the schematic diagrams of the assembly of the present invention.

[0041] Figure 10 This is the second schematic diagram of the assembly of the present invention.

[0042] Figure 11 Schematic diagram of the secondary delivery component of the present invention.

[0043] In the figure: 1. spray mechanism; 11. acid-resistant pump; 12. treatment component; 13. spray component; 2. tower body; 3. recovery mechanism; 4. treatment mechanism; 31. recovery ring; 32. secondary delivery component; 41. mounting plate; 411. drainage trough; 412. vent; 42. collecting component; 43. air outlet component; 321. mounting pipe; 322. liquid outlet nozzle; 323. separator; 421. collecting box; 422. arc-shaped delivery pipe; 423. delivery pipe 1; 424. delivery pipe 2; 431. air outlet pipe; 432. spoiler; 433. horizontal bar; 434. vertical bar; 435. blocking bar. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] See also Figure 1 、 Figure 2 and Figure 3 A multi-stage adsorption recovery and treatment device for chlorine-containing waste gas includes a tower body 2, on which is provided a spray mechanism 1 for alkali solution spray circulation. The spray mechanism 1 is a prior art. A demisting section is provided at the top of the interior of the tower body 2. The demisting section is used to intercept and condense droplets entrained in the treated gas to prevent them from being discharged with the gas, thereby ensuring the cleanliness of the exhaust gas.

[0046] Tower 2 is equipped with two observation windows, one above the other, on its sidewalls to facilitate real-time monitoring of the reaction status within the tower. A gas outlet pipe is located at the top of the tower, connected to an external exhaust system (not shown) to ensure the smooth discharge of treated gases. The sidewalls of the tower are also equipped with an exhaust gas inlet (not shown), and the bottom of the tower houses a storage chamber for the post-reaction alkali solution.

[0047] The spraying mechanism 1 includes an acid-resistant pump 11 arranged outside the tower body 2, a post-reaction alkali solution treatment component 12 and a spray component 13 arranged inside the spraying mechanism 1. The water inlet of the acid-resistant pump 11 is connected to the treatment component 12, the treatment component 12 is connected to the storage chamber at the bottom of the tower body 2, and the water outlet of the tower body 2 is connected to the spray component 13. The treated alkali solution is circulated to the spray component 13 through the acid-resistant pump 11 to achieve efficient spraying, ensure full contact between the waste gas and the alkali solution, enhance the adsorption effect, and the alkali solution after completion is returned to the storage chamber for recycling.

[0048] The acid-resistant pump 11 is made of corrosion-resistant materials (such as fluoroplastics, stainless steel, ceramics, etc.) and can withstand the acidic corrosive environment (such as hypochlorous acid, hydrochloric acid, etc.) generated during the treatment of chlorine-containing waste gas. The acid-resistant pump 11 is preferably a centrifugal pump or a diaphragm pump with a leak-proof sealing structure to avoid equipment corrosion or environmental pollution caused by leakage of alkali solution.

[0049] Treatment unit 12 is used to restore the processing capacity of the spent lye after absorbing chlorine. In the present invention, its function is to purify and regenerate the post-reaction lye in the storage chamber, allowing it to be recycled for spraying. This is achieved primarily by adding an alkaline agent (such as NaOH solution) to adjust the pH value, ensuring the lye's adsorption capacity is restored. A filtration device is also included to remove impurities, extending the lye's service life and improving overall treatment efficiency.

[0050] The spray component 13 atomizes the alkali solution through a spray head or nozzle and sprays it evenly into the interior of the tower body, where it contacts the chlorine-containing waste gas from bottom to top in reverse direction to complete the chlorine absorption reaction. The spray component 13 is made of a corrosion-resistant material to prevent the nozzle from being corroded or blocked by the alkali solution. Common nozzles include spiral nozzles, solid cone nozzles, hollow cone nozzles, etc. In the present invention, a wide-angle nozzle can be used to expand the coverage range and ensure that the alkali solution is evenly distributed in the cross section of the tower body.

[0051] The acid-resistant pump 11, processing component 12, and spray component 13 described above are all prior art and will not be described in detail in this application.

[0052] A processing mechanism 4 for conveying waste gas and collecting treated liquid is provided inside the tower body 2, and a recovery mechanism 3 for uniforming the edge spray is provided inside and above the processing mechanism 4.

[0053] See also Figure 2 and Figure 4 The recovery mechanism 3 includes two recovery rings 31 distributed up and down installed on the inner circumference of the tower body 2. The recovery rings 31 collect the alkali liquid sprayed on the inner wall of the tower body 2. The lower surface of the recovery ring 31 is provided with a secondary delivery component 32 for dispersing the edge spray. A circular collection groove is formed between the recovery ring 31 and the inner circumference of the tower body 2, which is used to collect the alkali liquid sprayed on the inner wall of the tower body 2, and then the alkali liquid is evenly dispersed into the interior of the tower body 2 through the secondary delivery component 32 to ensure that the utilization rate of the alkali liquid is maximized.

[0054] The exhaust gas outlet direction is changed by the exhaust gas outlet piece 43 to achieve uniform primary treatment, the waste liquid and exhaust gas are transported through the collecting piece 42 in separate channels to achieve uniform secondary treatment, and the edge spray is evenly sprayed by the secondary delivery piece 32 to achieve uniform tertiary treatment.

[0055] Glass is provided inside the observation window on the tower body 2 at a position that fits the inner circumferential surface of the tower body 2 , and the edge of the recovery ring 31 is sealed with the circumferential surface of the tower body 2 and the glass inside the observation window.

[0056] See also Figure 2 and Figure 5 The treatment mechanism 4 includes two upper and lower mounting plates 41 installed on the inner circumferential surface of the tower body 2. Filler (not shown in the figure) is evenly laid on the upper surface of the mounting plates 41. A collecting piece 42 for transferring wastewater is commonly provided on the two mounting plates 41. A plurality of gas outlet pieces 43 for conveying gas are evenly distributed on the upper surface of the mounting plates 41. The mounting plate 41 is in the shape of a bottle cap. A plurality of evenly distributed water discharge grooves 411 are opened on the upper surface of the mounting plate 41. A plurality of evenly distributed air vents 412 are opened on the upper surface of the mounting plate 41 and on both sides of the water discharge grooves 411.

[0057] During specific use, the chlorine-containing waste gas is first transported to the interior of the tower body 2 through the air inlet at the bottom of the tower body 2, and at the same time, the external exhaust fan sucks it through the air outlet at the top of the tower body 2. At this time, the chlorine-containing waste gas flows upward from the bottom of the tower body 2, and at the same time, the spray component 13 on the spray mechanism 1 starts to spray alkali solution. At this time, the chlorine-containing waste gas flows from bottom to top, and the alkali solution is sprayed from top to bottom. The chlorine-containing waste gas is subjected to primary treatment when passing through the lower mounting plate 41 among the two mounting plates 41. The chlorine-containing waste gas passes through the upper mounting plate 41 among the two mounting plates 41 and cooperates with the filler on the mounting plate 41 to perform gas-liquid two-phase reverse phase collision to treat the chlorine-containing waste gas.

[0058] During the treatment process, the chlorine-containing waste gas is fully separated from the filler by the mounting plate 41, and the chlorine-containing waste gas is disturbed by the gas outlet part 43 before contacting the filler, thereby reducing the flow rate of the chlorine-containing waste gas and increasing the contact time of the chlorine-containing waste gas with the alkali solution and the filler. At the same time, when the alkali solution that absorbs chlorine in the process of treating the chlorine-containing waste gas drips downward, the upper layer of alkali solution that absorbs chlorine is separated from the chlorine in the lower layer by the collecting part 42, thereby avoiding the alkali solution after the reaction from re-contacting the chlorine-containing waste gas after the first-stage treatment and affecting the treatment effect of the chlorine-containing waste gas. In the process of spraying the alkali solution by the spraying mechanism 1, the alkali solution on the inner wall of the tower body 2 is collected by the secondary delivery part 32 and re-sprayed on the filler, thereby improving the utilization rate of the alkali solution.

[0059] The treated chlorine-containing waste gas becomes clean air and passes through the demisting section at the top of the tower body 2 to absorb the droplets contained in the gas and then is discharged into the atmosphere from the air outlet at the top of the tower body 2 through an external exhaust fan. The reacted alkali liquid passes through the collecting piece 42 and flows downward into the storage chamber at the bottom of the tower body 2. The acid-resistant pump 11 extracts the alkali liquid after the reaction treated by the treatment component 12 and re-transports it to the spray component 13 for recycling, thereby completing the continuous purification of the chlorine-containing waste gas.

[0060] See also Figure 5 、 Figure 6 、 Figure 7 and Figure 8The air outlet member 43 includes an air outlet pipe 431 installed on the upper surface of the mounting plate 41 at a position corresponding to the air vent 412, that is, the middle air inlet hole of the air outlet pipe 431 is connected to the air vent 412. In the present application, an M-shaped air outlet pipe 431 with two air outlet holes is preferably used. However, the number and distribution of the air outlet holes can be adjusted according to actual needs in the present application, that is, it is not limited to the air outlet pipe 431, and three, four or even more air outlet holes can also be set.

[0061] A blocking member is provided at the outlet of the outlet pipe 431 to block the filler from blocking the outlet. The setting of the blocking member ensures that the outlet is not blocked by the filler, maintains smooth airflow, and enhances the gas-liquid contact efficiency, thereby further improving the purification effect.

[0062] A plurality of spoilers 432 distributed up and down are connected to the vertical section of the middle air inlet of the outlet pipe 431. The plurality of spoilers 432 are staggered inside the vertical section in the middle of the outlet pipe 431. The staggered arrangement of the spoilers 432 effectively breaks up the airflow, increases the gas-liquid contact area, and ensures that the exhaust gas is fully purified.

[0063] During specific use, first place a suitable amount of filler on the upper surface of the mounting plate 41. After the filler is placed on the mounting plate 41, the blocking member blocks the filler to prevent the filler from completely blocking the two air outlet holes on both sides of the air outlet pipe 431, so as to ensure smooth air outlet from the air outlet pipe 431 at various positions on the mounting plate 41. The chlorine-containing waste gas passes through the air vent 412 on the mounting plate 41 and enters the middle vertical section of the air outlet pipe 431. The chlorine-containing waste gas is disturbed by a plurality of staggered spoilers 432 to reduce the flow rate of the chlorine-containing waste gas, so as to ensure sufficient reaction time with the filler and the alkali solution. At the same time, the outlet direction of the chlorine-containing waste gas can be changed from upward to downward through the setting of the air outlet pipe 431, thereby further increasing the contact time between the chlorine-containing waste gas, the filler and the alkali solution.

[0064] In addition, because the chlorine-containing waste gas is input through the middle part of the outlet pipe 431 and output through the outlet holes on both sides, gas diversion is achieved. At the same time, the diameter of the air inlet hole in the middle of the outlet pipe 431 is limited to not larger than the diameter of the air outlet hole. The gas is diverted when passing through the air outlet hole. Moreover, because the diameter of the air inlet hole is not larger than the diameter of the air outlet hole, the flow velocity of the chlorine-containing waste gas is slowed down at the air outlet hole. That is, after the flow velocity of the chlorine-containing waste gas is slowed down when passing through the spoiler 432, the flow velocity is further reduced after passing through the two air outlet holes, ensuring that the waste gas is in full contact with the filler and the alkali solution, thereby improving the purification efficiency.

[0065] Since the packing has various shapes, such as ring, saddle, spherical, structured packing, etc., the blocking member needs to ensure that a certain distance is maintained between the packings below the air outlet to prevent the packings from accumulating and blocking the air outlet.

[0066] In the first embodiment, the blocking member includes a horizontal rod 433 and a vertical rod 434. The horizontal rod 433 is horizontally connected to the air outlet of the air outlet pipe 431, and the vertical rod 434 is vertically connected to the horizontal rod 433. The number of the vertical rods 434 can be freely selected. For example, in this application Figure 7 and Figure 8 The figure shows a vertical rod 434, which is located at the center of the horizontal rod 433. The vertical rod 434 divides the filler, ensuring uniform distribution of the filler and avoiding localized accumulation. In addition, two, three, or more vertical rods 434 can be provided to accommodate different filler shapes and distribution requirements. The spacing between the vertical rods 434 can be flexibly adjusted according to the filler characteristics to ensure uniform distribution of the filler below the air outlet and prevent blockage. In other words, multiple vertical rods 434 form a linear blocking structure, effectively separating the filler, improving the patency of the air outlet, and ensuring the exhaust gas purification effect.

[0067] In the second embodiment, the blocking member includes a plurality of blocking rods 435 (such as Figure 6 As shown), the blocking rods 435 are all vertically arranged, and appropriate spacing is maintained between the blocking rods 435 to form an annular blocking structure, which effectively separates the fillers and prevents them from accumulating and clogging the air outlets, ensuring that each air outlet outlet is evenly discharged, further improving the exhaust gas purification effect.

[0068] See also Figure 2 、 Figure 5 、 Figure 9 and Figure 10 The collecting piece 42 includes a collecting box 421 installed on the lower surface of the mounting plate 41. The circumferential surfaces of the upper and lower mounting plates 41 are commonly connected with a plurality of arc-shaped conveying pipes 422 distributed in a circular array. The arc-shaped conveying pipes 422 are hollow and open at the bottom end. The side of the arc-shaped conveying pipe 422 close to the mounting plate 41 is connected to the circumferential surface of the arc-shaped conveying pipe 422 through a conveying pipe 1 423. The arc-shaped conveying pipe 422 is embedded in the inner circumferential surface of the mounting plate 41, and the upper surface of the arc-shaped conveying pipe 422 corresponding to the position of the water drain groove 411 on the mounting plate 41 is connected through a conveying pipe 2 424.

[0069] During specific use, in the process of continuously treating chlorine-containing waste gas, the sprayed alkali liquid reacts with the chlorine-containing waste gas, and the alkali liquid after the reaction drips downward. At this time, the alkali liquid after the reaction drips onto the upper surface of the mounting plate 41, enters the interior of the collection box 421 through the water drain groove 411 on the upper surface of the mounting plate 41, and then flows downward through the arc-shaped conveying pipe 422 to the storage cavity at the bottom of the tower body 2. The alkali liquid sprayed by the spraying parts 13 above the two mounting plates 41 reacts with the chlorine-containing waste gas and enters the corresponding collection box 421 through their respective water drain grooves 411 to be collected, thereby avoiding secondary contact between the alkali liquid after the upper reaction and the chlorine-containing waste gas after the first-level treatment in the lower layer, so as to ensure better treatment effect of the chlorine-containing waste gas.

[0070] In addition, the collection box 421 is arranged on the lower surface of the mounting plate 41. When the chlorine-containing waste gas flows upward, it needs to bypass the periphery of the collection box 421, and then flow out through the vent hole 412 on the mounting plate 41 into the exhaust pipe 431. The collection box 421 can block the normal flow of chlorine-containing waste gas, slow down the gas flow rate, prolong the waste gas residence time, and improve the treatment effect.

[0071] See also Figure 4 and Figure 11 The secondary delivery member 32 includes a plurality of mounting tubes 321 installed on the lower surface of the recovery ring 31 and distributed in a circular array. The end of the mounting tube 321 away from the recovery ring 31 is connected to a liquid outlet nozzle 322, and the end of the liquid outlet nozzle 322 away from the mounting tube 321 is internally connected to a plurality of evenly distributed separators 323. Circular through holes are provided at the positions of the inner wall of the bottom end of the recovery ring 31 corresponding to the positions of the mounting tubes 321, and the top of the circular through holes is provided with a slope to facilitate the inflow of water.

[0072] During specific use, when the spraying component 13 sprays alkali solution, the alkali solution sprayed by the spraying component 13 near the inner wall of the tower body 2 will be directly sprayed on the inner wall of the tower body 2. At this time, the alkali solution flows downward along the interior of the tower body 2. When the alkali solution passes through the recovery ring 31, the recovery ring 31 intercepts and collects the alkali solution flowing downward. After the alkali solution is collected inside the recovery ring 31, it enters the interior of the installation pipe 321 through the circular through-hole on the recovery ring 31. The alkali solution is transported to the interior of the liquid outlet nozzle 322 through the installation pipe 321. After entering the interior of the liquid outlet nozzle 322, the alkali solution is divided into multiple streams by the separator 323, so that the recovered alkali solution can be in more sufficient contact with the filler, avoiding insufficient contact with the chlorine-containing waste gas when the alkali solution is sprayed on the inner wall of the tower body 2 and flows downward, thereby ensuring full utilization of the alkali solution.

[0073] See also Figure 1 、 Figure 2 、 Figure 4 and Figure 5 A multi-stage adsorption recovery and treatment process for chlorine-containing waste gas, which is completed in conjunction with a recovery and treatment device, specifically includes the following steps:

[0074] S1. First, chlorine-containing waste gas enters the interior of the tower body 2, and the spraying mechanism 1 starts to spray alkali solution.

[0075] S2. At this time, the chlorine-containing waste gas flows from bottom to top, and the alkali solution is sprayed from top to bottom, and the filler on the installation plate 41 is used to perform gas-liquid two-phase reverse phase flushing to treat the chlorine-containing waste gas.

[0076] S3. During the treatment process, the chlorine-containing waste gas is fully separated from the filler by the installation plate 41, and the chlorine-containing waste gas is disturbed before contacting the filler to reduce the flow rate of the chlorine-containing waste gas and increase the contact time of the chlorine-containing waste gas with the alkali solution and the filler.

[0077] S4. When the alkaline solution that absorbs chlorine gas during the treatment of chlorine-containing waste gas drips downward, the alkaline solution that absorbs chlorine gas in the upper layer is separated from the chlorine gas in the lower layer by the collecting member 42.

[0078] S5. During the process of spraying the alkali solution by the spraying mechanism 1, the alkali solution on the inner wall of the mounting plate 41 is collected by the secondary delivery member 32 and sprayed on the filler again, thereby improving the utilization rate of the alkali solution.

[0079] S6. The treated chlorine-containing waste gas becomes clean air and is discharged from the interior of the tower body 2 to the outside, thereby completing the purification of the chlorine-containing waste gas.

[0080] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0081] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features designated as "first," "second," "number one," and "number two" may explicitly or implicitly include at least one such feature. Throughout the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0082] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0083] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-stage adsorption recovery and treatment device for chlorine-containing waste gas, comprising a tower body (2), a spray mechanism (1) being provided on the tower body (2), and characterized in that: A processing mechanism (4) for conveying waste gas and collecting treated liquid is provided inside the tower body (2), and a recovery mechanism (3) for uniformizing edge spray is provided inside and above the processing mechanism (4); The recovery mechanism (3) includes two recovery rings (31) installed on the inner circumferential surface of the tower body (2) and distributed up and down. The recovery rings (31) collect the alkali solution sprayed on the inner wall of the tower body (2). The lower surface of the recovery ring (31) is provided with a secondary delivery member (32) for dispersing the edge spray. The treatment mechanism (4) includes two mounting plates (41) mounted on the inner circumferential surface of the tower body (2) and distributed up and down. A collecting member (42) for transferring wastewater is commonly provided on the two mounting plates (41). A plurality of gas outlet members (43) for conveying gas are evenly distributed on the upper surface of the mounting plates (41). The exhaust gas outlet direction is changed by the exhaust gas outlet member (43) to achieve uniform primary treatment, the waste liquid and exhaust gas are transported through separate channels by the collecting member (42) to achieve uniform secondary treatment, and the edge spray is evenly sprayed by the secondary delivery member (32) to achieve uniform tertiary treatment; The mounting plate (41) is in the shape of a bottle cap, and a plurality of evenly distributed water discharge grooves (411) are provided on the upper surface of the mounting plate (41), and a plurality of evenly distributed vent holes (412) are provided on the upper surface of the mounting plate (41) and on both sides of the water discharge grooves (411); The collecting member (42) includes a collecting box (421) mounted on the lower surface of the mounting plate (41), and the upper surface of the collecting box (421) and the position of the water drain groove (411) on the mounting plate (41) are both connected through the second delivery pipe (424); The collection box (421) is arranged on the lower surface of the mounting plate (41). When the chlorine-containing waste gas flows upward, it bypasses the periphery of the collection box (421) and then flows out through the vent hole (412) on the mounting plate (41) and enters the interior of the exhaust pipe (431).

2. The multi-stage adsorption recovery treatment device for chlorine-containing waste gas according to claim 1, characterized in that: A circular collecting trough for collecting the alkali solution sprayed on the inner wall of the tower body (2) is formed between the recovery ring (31) and the inner circumferential surface of the tower body (2), and the alkali solution is evenly dispersed into the interior of the tower body (2) again through the secondary delivery member (32).

3. The multi-stage adsorption recovery treatment device for chlorine-containing waste gas according to claim 1, characterized in that: The secondary delivery member (32) comprises a plurality of mounting tubes (321) mounted on the lower surface of the recovery ring (31) and distributed in a circumferential array. An end of the mounting tube (321) away from the recovery ring (31) is connected to a liquid outlet nozzle (322). An end of the liquid outlet nozzle (322) away from the mounting tube (321) is internally connected to a plurality of evenly distributed separators (323).

4. The multi-stage adsorption recovery treatment device for chlorine-containing waste gas according to claim 1, characterized in that: A plurality of arc-shaped delivery pipes (422) distributed in a circumferential array are commonly connected to the circumferential surfaces of the upper and lower mounting plates (41). The arc-shaped delivery pipes (422) are hollow and have an open bottom.

5. The multi-stage adsorption recovery treatment device for chlorine-containing waste gas according to claim 4, characterized in that: A surface of the arc-shaped delivery pipe (422) close to the mounting plate (41) is connected to the circumferential surface of the arc-shaped delivery pipe (422) via delivery pipe 1 (423), and the arc-shaped delivery pipe (422) is embedded in the inner circumferential surface of the mounting plate (41).

6. The multi-stage adsorption recovery treatment device for chlorine-containing waste gas according to claim 1, characterized in that: The air outlet member (43) comprises an air outlet pipe (431) connected to each position of the air vent (412) installed on the upper surface of the mounting plate (41), and a blocking member for blocking filler to block the air outlet is provided at the air outlet of the air outlet pipe (431).

7. The multi-stage adsorption recovery treatment device for chlorine-containing waste gas according to claim 6, characterized in that: A plurality of spoilers (432) distributed vertically are connected to the interior of the vertical section of the air inlet in the middle of the air outlet pipe (431), and the plurality of spoilers (432) are staggeredly arranged in the interior of the vertical section in the middle of the air outlet pipe (431).

8. The multi-stage adsorption recovery treatment device for chlorine-containing waste gas according to claim 6, characterized in that: The diameter of the air inlet in the middle of the air outlet pipe (431) is not larger than the diameter of the air outlet, and the flow velocity of the chlorine-containing waste gas is slowed down at the air outlet.

9. A multi-stage adsorption recovery process for chlorine-containing waste gas, which is carried out in conjunction with the recovery and treatment device of claim 1, characterized in that: The specific steps include: S1. First, the chlorine-containing waste gas enters the interior of the tower body (2), and the spraying mechanism (1) starts to spray alkali solution; S2, at this time, the chlorine-containing waste gas flows from bottom to top, and the alkali solution is sprayed from top to bottom, and the gas-liquid two-phase reverse phase flushing is carried out in conjunction with the filler on the mounting plate (41) to treat the chlorine-containing waste gas; S3. During the treatment process, the chlorine-containing waste gas is fully separated from the filler by the installation plate (41), and the chlorine-containing waste gas is disturbed before contacting the filler, thereby reducing the flow rate of the chlorine-containing waste gas and increasing the contact time between the chlorine-containing waste gas, the alkali solution and the filler; S4. When the alkali solution that absorbs chlorine gas during the treatment of chlorine-containing waste gas drips downward, the alkali solution that absorbs chlorine gas in the upper layer is separated from the chlorine gas in the lower layer by the collecting member (42); S5. During the process of spraying the alkali solution by the spraying mechanism (1), the alkali solution on the inner wall of the mounting plate (41) is collected by the secondary delivery member (32) and sprayed on the filler again, thereby improving the utilization rate of the alkali solution; S6. The treated chlorine-containing waste gas is converted into clean air and discharged from the interior of the tower body (2) to the outside, thereby completing the purification of the chlorine-containing waste gas.

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