A tail gas treatment device for purifying zirconium tetrachloride from molten salt

Abstract

The invention discloses a tail gas treatment device for purifying zirconium tetrachloride with molten salt, relates to the technical field of zirconium tetrachloride preparation, comprises a pre-treatment device storing sodium hydroxide solution, the pre-treatment device is provided with a gas transmission pipeline and an air outlet pipeline; also comprises a purification module connected with the air outlet pipeline, the purification module comprises a purification tower, a partition is provided in the purification tower, the partition separates the inside of the purification tower into a spray chamber and an exhaust chamber, the top of the purification tower is connected with an air inlet pipe, the other end of the air inlet pipe is connected with the air outlet pipeline, and the top of the purification tower is also connected with the exhaust pipe; the bottom of the purification tower is connected with a storage box, and a circulation pump is arranged on one side of the storage box; the invention filters the precipitate generated after the absorbent reacts with the tail gas by arranging a filtering module, and the filtered absorbent can fall into the storage box for recycling, so as to avoid the precipitate being sucked back into the circulation pipe by the circulation pump for reuse.

Description

Technical Field

[0001] The invention relates to the technical field of zirconium tetrachloride preparation, and in particular to a tail gas treatment device for purifying zirconium tetrachloride with molten salt. Background Art

[0002] Molten salt purification of zirconium tetrachloride is a method of deeply purifying crude zirconium tetrachloride through a molten salt system, aiming to remove impurities and produce high-purity zirconium tetrachloride. In the process of molten salt purification of zirconium tetrachloride, tail gas treatment is a key link, the main purpose of which is to remove or recover harmful substances in the tail gas and improve the safety and environmental protection of production. In the process of manufacturing zirconium tetrachloride, some chlorine will be left behind. This highly irritating and toxic gas must be treated before it can be released into the air. Therefore, the waste gas generated usually includes zirconium tetrachloride released by the molten salt system and chlorine, hydrogen chloride and other components mixed in the raw material crude zirconium tetrachloride.

[0003] The use of leaching absorption method to treat the tail gas generated during the preparation of zirconium tetrachloride is an efficient and commonly used tail gas purification technology. The leaching absorption method mainly uses the absorbent (such as sodium hydroxide solution) to react chemically with harmful components in the tail gas (such as chlorine, silicon tetrachloride, etc.) to generate harmless or low-toxic substances, thereby purifying the tail gas. The absorbent is usually recycled in the leaching tower to reduce production costs.

[0004] In the elution tower, the exhaust gas and the sprayed absorbent are fully mixed. The precipitate generated by the reaction may be mixed with tiny particles in the exhaust gas, incompletely reacted absorbent and other impurities, easily forming a muddy mixture. For example, harmful gases such as chlorine (Cl2) and silicon tetrachloride (SiCl4) in the exhaust gas react with the absorbent (such as sodium hydroxide solution) to generate corresponding salts and other compounds and form a precipitate.

[0005] In actual application, these precipitates will accumulate in the absorbent storage tank. When the accumulated amount is large, it is easy to suck out the precipitates when the absorbent is recycled, which will not only affect the absorption effect of the subsequent absorbent, but also cause blockage of the circulation pump or pipeline. Summary of the invention

[0006] The object of the present invention is to provide a tail gas treatment device for purifying zirconium tetrachloride from molten salt to solve the following technical problems:

[0007] The precipitate produced by the reaction of the absorbent and the harmful substances will accumulate in the absorbent storage box. When the accumulated amount is large, it is easy to suck out the precipitate when the absorbent is recycled.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A tail gas treatment device for purifying zirconium tetrachloride from molten salt, comprising a pre-treatment device storing a sodium hydroxide solution, wherein the pre-treatment device is provided with a gas transmission pipeline and a gas outlet pipeline;

[0010] It also includes a purification module connected to the air outlet pipe, the purification module includes a purification tower, a partition is provided in the purification tower, the partition separates the interior of the purification tower into a spray chamber and an exhaust chamber, the top of the purification tower is connected to the air inlet pipe, the other end of the air inlet pipe is connected to the air outlet pipe, and the top of the purification tower is also connected to the exhaust pipe;

[0011] The bottom of the purification tower is connected to the storage tank, a circulation pump is arranged on one side of the storage tank, and the circulation pump is connected to the annular spray pipe arranged in the spray chamber through a circulation pipe, and a plurality of groups of atomizing nozzles are arranged in a circumferential array on the inner side of the annular spray pipe;

[0012] A filter module is provided at the connection end between the purification tower and the storage box, and the filter module is used to filter the precipitate generated after the absorbent reacts with the tail gas.

[0013] Preferably, a discharge box is provided at the bottom of the purification tower, a feed box is provided at the top of the storage box, the filter module comprises a filter plate slidably arranged between the discharge box and the feed box, two groups of filter slots are symmetrically arranged on the filter plate, a partition seat is formed between the two groups of filter slots, and a plurality of groups of filter holes are evenly arranged at the bottom of the filter slot;

[0014] Wherein, one side of the filter plate is fixed to the driving end of a driving cylinder fixedly arranged on the storage box.

[0015] Preferably, first sealing plates are symmetrically fixedly arranged on both sides of the bottom of the discharge box, and second sealing plates are symmetrically fixedly arranged on both sides of the top of the feed box.

[0016] Preferably, a baffle is slidably provided on one side away from the two groups of filter tanks, two groups of guide rods are symmetrically fixedly arranged on the outside of the baffle, two groups of L-shaped brackets are correspondingly fixedly arranged on the filter plate, the guide rod is slidably connected to the L-shaped bracket, and a first spring is provided on the guide rod;

[0017] Wherein, a containing box is fixedly arranged on the first sealing plate, a scraper is slidably embedded in the containing box, the cross section of the bottom of the scraper is conical, and the scraper is connected to a lifting part that drives the scraper to rise and fall.

[0018] Preferably, the storage box is provided with a collection box for receiving sediment impurities.

[0019] Preferably, the lifting part comprises an L-shaped support plate fixedly arranged on the scraper plate, a support shaft slidably connected to the L-shaped support plate is fixedly arranged on the first sealing plate, and a second spring is arranged on the support shaft;

[0020] Among them, connecting frames are fixedly arranged at both ends of the scraper, and the connecting frames are rotatably arranged with guide wheels toward one end of the storage box. Supporting plates for supporting each group of guide wheels are respectively arranged on both sides of the filter plate, and the supporting plates are connected to the driving mechanism that drives them to move closer to or away from the filter plate.

[0021] Preferably, the pushing mechanism comprises a guide frame fixedly arranged on the storage box, a guide plate is arranged inside the guide frame, the guide plate is fixed to the storage box, an outer edge surface of the guide plate and an inner edge surface of the guide frame are enclosed to form a guide groove mechanism, the guide groove mechanism comprises two sets of first straight guide grooves and second straight guide grooves which are arranged in parallel and staggered, and both ends of the first straight guide groove and the second straight guide groove are respectively connected to the second inclined groove through the first inclined groove;

[0022] Among them, each group of the supporting plates is fixed to the filter plate through a telescopic cylinder, a third spring is provided on the telescopic cylinder, a pin shaft embedded in the guide groove mechanism is fixedly arranged at the bottom of the supporting plate, and an extension plate is fixedly arranged at the end of each group of supporting plates.

[0023] Preferably, a wedge plate is provided at the connection position between the second inclined groove and the first straight guide groove, the wedge plate is slidably arranged in a slide groove opened at the end of the guide plate, and a spring mechanism fixed to the wedge plate is fixed in the slide groove;

[0024] Wherein, the inclined surface of the wedge plate is located in a direction away from the first straight guide groove.

[0025] Preferably, a limit frame is arranged in the storage box, a limit rod is slidably arranged in the limit frame, a float is arranged at the bottom of the limit rod, a lifting frame is arranged on the top of the limit rod, two groups of first electrode sheets are arranged at the bottom of the lifting frame, and two groups of second electrode sheets are correspondingly arranged on the limit frame, and the first electrode sheet and the second electrode sheet are electrically connected to the driving cylinder through a controller.

[0026] Beneficial effects of the present invention:

[0027] (1) The exhaust gas of the present invention is initially treated by the pre-treatment device and then enters the purification tower of the first group of purification modules through the outlet pipe and the inlet pipe. The circulation pump extracts the absorbent in the storage box through the circulation pipe and transports it to the annular spray pipe. The atomizing nozzle sprays the absorbent and purifies the exhaust gas entering the spray chamber. The purified exhaust gas passes through the gap between the partition and the bottom of the purification tower and enters the exhaust chamber, and is finally discharged through the exhaust pipe. The absorbent after spraying can fall into the storage box again for recycling. The present invention further improves the purification effect by setting three groups of purification modules to treat the exhaust gas. At the same time, the partition in the purification tower divides the interior of the purification tower into a spray chamber and an exhaust chamber, and the annular spray pipe is set at the top of the spray chamber. Therefore, when the exhaust gas is input into the purification tower, it needs to pass through the spray chamber before entering the exhaust chamber to avoid the exhaust gas being directly discharged from the exhaust pipe, thereby extending the spraying time of the exhaust gas and improving the spraying effect.

[0028] (2) The present invention provides a filtering module to filter the precipitate generated after the absorbent reacts with the tail gas. The filtered absorbent can fall into the storage box for recycling, thereby preventing the precipitate from being sucked back into the circulation pipe by the circulation pump for reuse. The filtered absorbent has a better absorption effect when recycled, and can also avoid the phenomenon of clogging the circulation pipe.

[0029] (3) In the purification process of the present invention, the filter plate is first driven by the driving cylinder to slide between the discharge box and the feed box, so that one group of filter slots corresponds to the position of the discharge box and the feed box, and the absorbent after spraying and the impurities after reaction are discharged into the filter slot through the discharge box, and the sediment impurities are filtered through the arranged filter holes, and the filtered liquid is discharged into the storage box through the feed box. After a period of purification, the filter plate is driven by the driving cylinder to slide again, so that the filter slot on the other side corresponds to the position of the discharge box and the feed box, and the sediment impurities in the extracted filter slot are cleaned at the same time, and this reciprocating process is repeated to avoid excessive sediment impurities accumulating in the filter slot and affecting the filtering effect;

[0030] (4) In the initial state of the present invention, based on the buoyancy of the absorbent on the float, the lifting frame is located at a corresponding initial height. When the filter tank is blocked, the speed at which the absorbent falls slows down, so that the circulating pump cannot replenish the absorbent in the storage box in time after it is extracted. The liquid level in the storage box decreases, and the float drives the lifting frame to descend synchronously. When the first electrode sheet contacts the second electrode sheet, an electrical signal is generated and transmitted to the driving cylinder through the controller, so that the driving cylinder performs a corresponding action to clean the filter tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 It is a structural schematic diagram of a tail gas treatment device for purifying zirconium tetrachloride from molten salt according to the present invention;

[0033] Figure 2 It is a schematic diagram of the internal structure of a purification tower in a tail gas treatment device for purifying zirconium tetrachloride from molten salt according to the present invention;

[0034] Figure 3 It is a schematic diagram of the three-dimensional structure of a purification tower in a tail gas treatment device for purifying zirconium tetrachloride from molten salt according to the present invention;

[0035] Figure 4 It is a structural schematic diagram of a sealing plate in a tail gas treatment device for purifying zirconium tetrachloride from molten salt according to the present invention;

[0036] Figure 5It is a structural schematic diagram of a filter plate in a tail gas treatment device for purifying zirconium tetrachloride from molten salt according to the present invention;

[0037] Figure 6 It is a schematic structural diagram of a containing box in a tail gas treatment device for purifying zirconium tetrachloride from molten salt according to the present invention;

[0038] Figure 7 It is a structural schematic diagram of the change in the position of a scraper when the filter tank shrinks in a tail gas treatment device for purifying zirconium tetrachloride from molten salt according to the present invention;

[0039] Figure 8 It is a structural schematic diagram of a guide frame in a tail gas treatment device for purifying zirconium tetrachloride from molten salt according to the present invention;

[0040] Fig. 9 It is a structural schematic diagram of an atomizing nozzle in a tail gas treatment device for purifying zirconium tetrachloride from molten salt according to the present invention;

[0041] Fig.10 The present invention is a schematic structural diagram of the installation of a filter plate in a tail gas treatment device for purifying zirconium tetrachloride from molten salt.

[0042] In the figure: 1, pre-processor; 2, purification module; 3, limit frame; 4, discharge box; 5, filter plate; 6, guide frame; 7, bearing plate; 101, gas pipeline; 102, gas outlet pipeline; 103, dust removal pipe; 104, fan; 105, purification water tower; 201, purification tower; 202, storage box; 203, air inlet pipe; 204, exhaust pipe; 205, partition; 206, spray chamber; 207, exhaust chamber; 208, annular spray pipe; 209, circulation pump; 210, circulation pipe; 211, atomizing nozzle; 301, float; 302, limit rod; 303, lifting frame; 304, first electrode sheet; 305, second electrode sheet; 401, first sealing plate; 402, Accommodating box; 403, scraper; 404, L-shaped support plate; 405, support shaft; 406, second spring; 407, connecting frame; 408, guide wheel; 409, second sealing plate; 501, filter tank; 502, first spring; 503, filter hole; 504, baffle; 505, partition seat; 506, L-shaped bracket; 507, guide rod; 601, guide plate; 602, collecting box; 603, driving cylinder; 604, second inclined groove; 605, wedge plate; 606, inclined surface; 607, feeding box; 608, first straight guide groove; 609, first inclined groove; 610, second straight guide groove; 701, pin shaft; 702, extension plate; 703, third spring; 704, telescopic cylinder. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0044] Example 1

[0045] See also Figure 1 As shown, the present invention is a tail gas treatment device for purifying zirconium tetrachloride from molten salt, comprising a pre-processor 1 storing a sodium hydroxide solution, a gas pipeline 101 being arranged on one side of the pre-processor 1, and a gas outlet pipeline 102 being arranged on the pre-processor 1; in one implementation of the present embodiment, the tail gas is transported to below the sodium hydroxide liquid level in the pre-processor 1 through the gas pipeline 101, which can prevent gas reflux and play a role in the initial purification of the tail gas, and the gas to be treated flows out unidirectionally from the gas outlet pipeline 102.

[0046] For details, please refer to Figure 1-Figure 2 , also includes a purification module 2 connected to the air outlet pipe 102, the purification module 2 includes a purification tower 201, a partition 205 is provided in the purification tower 201, the partition 205 divides the interior of the purification tower 201 into a spray chamber 206 and an exhaust chamber 207, an air inlet pipe 203 connected to the spray chamber 206 is provided at the top of the purification tower 201, the other end of the air inlet pipe 203 is connected to the air outlet pipe 102, and an exhaust pipe 204 connected to the exhaust chamber 207 is also provided at the top of the purification tower 201; accordingly, the purification module 2 of this embodiment is provided with three groups, and the specific number of the purification modules 2 is not limited in this embodiment, so as to meet the actual purification needs.

[0047] See also Figure 2 and Fig. 9 The bottom of the purification tower 201 is connected to a storage box 202 for storing absorbents. A circulation pump 209 is arranged on one side of the storage box 202. The circulation pump 209 is connected to an annular spray pipe 208 arranged in the spray chamber 206 through a circulation pipe 210. A plurality of groups of atomizing nozzles 211 are arranged in a circumferential array on the inner side of the annular spray pipe 208. Specifically, the absorbent in this embodiment is a sodium hydroxide solution.

[0048] It should be noted that, after the exhaust gas is preliminarily treated by the pre-processor 1, it enters the purification tower 201 of the first group of purification modules 2 through the outlet pipe 102 and the inlet pipe 203. The circulation pump 209 extracts the absorbent in the storage box 202 through the circulation pipe 210 and transports it to the annular spray pipe 208. The atomizing nozzle 211 sprays the absorbent and purifies the exhaust gas entering the spray chamber 206. The purified exhaust gas passes through the gap between the partition 205 and the bottom of the purification tower 201 and enters the exhaust chamber 207. Finally, the exhaust gas is discharged through the exhaust pipe 210. The absorbent is discharged through the air pipe 204, and the sprayed absorbent can fall into the storage box 202 again for recycling. For the second group of purification modules 2, its air inlet pipe 203 is connected with the exhaust pipe 204 of the first group of purification modules 2. Therefore, the exhaust gas purified by the first group of purification modules 2 enters the second group of purification modules 2 for further purification. The structure and purification principle of the third group of purification modules 2 are the same as those of the second group of purification modules 2. This embodiment further improves the purification effect by setting three groups of purification modules 2 to process the exhaust gas.

[0049] See also Figure 2-Figure 3 A filter module is provided at the connection end between the purification tower 201 and the storage box 202, and the filter module is used to filter the precipitate produced after the reaction of the absorbent and the exhaust gas; it can be explained that, by setting the filter module, the present embodiment can filter the precipitate produced after the reaction of the absorbent and the exhaust gas, and the filtered absorbent can fall into the storage box 202 for recycling, thereby preventing the precipitate from being re-sucked into the circulation pipe 210 by the circulation pump 209 for reuse, and the absorption effect of the filtered absorbent is better when it is recycled, and the blockage of the circulation pipe 210 can also be avoided.

[0050] In addition, in this embodiment, the last group of purification modules 2 is connected to the purification water tower 105, the end of the purification water tower 105 is connected to the dust removal pipe 103, and an adsorption filler is provided in the dust removal pipe 103 to remove dust from the exhaust gas;

[0051] A fan 104 is provided at the bottom of the dust removal pipe 103 to improve the conveying efficiency of the exhaust gas.

[0052] Example 2

[0053] Based on Example 1, please refer to Figure 3-Figure 5A discharge box 4 is arranged at the bottom of the purification tower 201, and a feed box 607 is arranged at the top of the storage box 202. The filtering module includes a filter plate 5 slidably arranged between the discharge box 4 and the feed box 607. Two groups of filter slots 501 are symmetrically arranged on the filter plate 5. A partition seat 505 is formed between the two groups of filter slots 501. A plurality of filter holes 503 are evenly arranged at the bottom of the filter slot 501, wherein one side of the filter plate 5 is fixed to the driving end of a driving cylinder 603 fixedly arranged on the storage box 202; it can be explained that the upper and lower surfaces of the filter plate 5 are respectively slidably fitted with the discharge box 4 and the feed box 607. In the purification process, the filter plate 5 is first driven by the driving cylinder 603 to move between the discharge box 4 and the feed box 60 7 so that one group of filter tanks 501 corresponds to the position of the discharge box 4 and the feed box 607, the absorbent after spraying and the impurities after reaction are discharged into the filter tank 501 through the discharge box 4, the sediment impurities are filtered through the arranged filter holes 503, and the filtered liquid is discharged into the storage box 202 through the feed box 607. After purification for a period of time, the filter plate 5 is driven by the driving cylinder 603 to slide again so that the filter tank 501 on the other side corresponds to the position of the discharge box 4 and the feed box 607, and the sediment impurities in the extracted filter tank 501 are cleaned up at the same time, and this reciprocating process is used to avoid excessive sediment impurities accumulating in the filter tank 501 and affecting the filtering effect.

[0054] In this embodiment, please refer to Figure 4 and Fig.10 The first sealing plates 401 are symmetrically fixed on both sides of the bottom of the discharge box 4, and the second sealing plates 409 are symmetrically fixed on both sides of the top of the feed box 607; specifically, when the filter tank 501 is driven to be pulled out, in order to prevent part of the exhaust gas from leaking from the filter tank 501 and the filter holes 503 into the atmosphere, this embodiment seals the filter tank 501 and the filter holes 503 by setting the first sealing plate 401 and the second sealing plate 409.

[0055] See also Figure 4-Figure 7, a baffle plate 504 is slidably provided on the side away from the two groups of filter tanks 501, and two groups of guide rods 507 are symmetrically fixed on the outer side of the baffle plate 504, and two groups of L-shaped brackets 506 are correspondingly fixed on the filter plate 5, and the guide rods 507 are slidably connected with the L-shaped brackets 506, and a first spring 502 is provided on the guide rod 507, one end of the first spring 502 is fixed to the baffle plate 504, and the other end is fixed to the L-shaped bracket 506, wherein a receiving box 402 with two ends passing through is fixedly arranged on the first sealing plate 401, and a scraper 403 is slidably embedded in the receiving box 402, and the cross-section of the bottom of the scraper 403 is conical, and the scraper 403 is connected to the lifting part that drives it to rise and fall; it can be explained that when the filter tank 501 is connected with the discharge box 4 and When the position of the feed box 607 corresponds to that of the feed box 607 or when the feed box 607 is in the withdrawn state, the scraper 403 is in the state of being embedded in the receiving box 402. When the filter tank 501 moves from the outside to the direction between the discharge box 4 and the feed box 607, the scraper 403 is driven down by the lifting part to make the scraper 403 contact with the bottom of the filter tank 501. Then, as the filter tank 501 continues to move, the scraper 403 can block the sediment impurities in the filter tank 501. When the scraper 403 contacts the baffle 504, the baffle 504 can be limited to separate the baffle 504 from the filter tank 501. Then, the impurities on the filter tank 501 can fall from the gap between the baffle 504 and the filter tank 501 (see Figure 7 ), at this time, the baffle 504 pushes the guide rod 507 to slide on the L-shaped bracket 506 and compresses the first spring 502. When the baffle 504 moves to the extreme position, the lifting part drives the scraper 403 to re-embed into the containing box 402, and the first spring 502 can drive the baffle 504 to reset. This embodiment can achieve the effect of automatically scraping off the sediment impurities on the surface of the filter tank 501.

[0056] In addition, a collection box 602 for receiving sediment impurities is provided on the storage box 202; specifically, when the scraper 403 scrapes off the sediment impurities on the filter tank 501, the sediment impurities are collected through the collection box 602 for subsequent unified processing.

[0057] As a further solution of this embodiment, please refer to Figure 4-Figure 5 as well as Figure 7The lifting part includes an L-shaped support plate 404 fixedly arranged on the scraper plate 403, a support shaft 405 slidably connected to the L-shaped support plate 404 is fixedly arranged on the first sealing plate 401, and a second spring 406 is arranged on the support shaft 405, one end of the second spring 406 is fixed to the first sealing plate 401, and the other end is fixed to the L-shaped support plate 404, wherein both ends of the scraper plate 403 are fixedly arranged with a connecting frame 407, and the connecting frame 407 is rotatably arranged with a guide wheel 408 toward one end of the storage box 202, and the two sides of the filter plate 5 are respectively arranged with a supporting plate 7 for supporting each group of guide wheels 408, and the supporting plate 7 is connected to a driving mechanism that drives it to move toward or away from the filter plate 5; it can be explained that when the filter tank 501 is at When it is between the discharge box 4 and the feed box 607, the supporting plates 7 on both sides thereof are in a state of supporting the guide wheel 408, and the scraper 403 is also embedded in the accommodating box 402. When the driving cylinder 603 drives the filter tank 501 on this side to be pulled out from the discharge box 4 and the feed box 607, the filter plate 5 can synchronously drive the supporting plate 7 to move. When the filter plate 5 moves to the extreme position, the supporting plate 7 is driven by the pushing part to move in the direction away from the filter plate 5, so that the guide wheel 408 is separated from the supporting plate 7, and the second spring 406 can drive the scraper 403 to move downward. When the filter tank 501 on this side moves between the discharge box 4 and the feed box 607 again, the sediment impurities on the surface of the filter tank 501 can be scraped off by the scraper 403.

[0058] In this embodiment, please refer to Figure 4-Figure 5 as well as Figure 8The pushing mechanism includes a guide frame 6 fixedly arranged on the storage box 202, a guide plate 601 is arranged inside the guide frame 6, the guide plate 601 is fixed to the storage box 202, the outer edge surface of the guide plate 601 and the inner edge surface of the guide frame 6 are enclosed to form a guide groove mechanism, the guide groove mechanism includes two groups of parallel and staggered first straight guide grooves 608 and second straight guide grooves 610, the two ends of the first straight guide groove 608 and the second straight guide groove 610 are respectively connected to the second inclined groove 604 through the first inclined groove 609, wherein each group of carrying plates 7 is respectively fixed to the filter plate 5 through a telescopic cylinder 704, a third spring 703 is arranged on the telescopic cylinder 704, one end of the third spring 703 is fixed to the carrying plate 7, and the other end is fixed to the cylinder body, a pin shaft 701 embedded in the guide groove mechanism is fixedly arranged at the bottom of the carrying plate 7, and an extension plate is fixedly arranged at the end of each group of carrying plates 7 702; It can be explained that when the driving cylinder 603 drives the side filter groove 501 to be drawn out of the discharge box 4 and the feed box 607, the supporting plate 7 synchronously drives the pin shaft 701 to move along the first straight guide groove 608 toward the first inclined groove 609. At this time, the third spring 703 is in a contracted state. When it moves to the end of the first straight guide groove 608, under the pushing action of the third spring 703, the pin shaft 701 can move along the first inclined groove 609 toward the second straight guide groove 610. At this time, the supporting plate 7 gradually separates from the guide wheel 408. When the driving cylinder 603 drives the side filter groove 501 to be reset toward the discharge box 4 and the feed box 607, the supporting plate 7 drives the pin shaft 701 to move along the second straight guide groove 610 toward the second inclined groove 604, and finally can move along the second inclined groove 604 to the initial position (see Figure 8 );

[0059] It is also necessary to note that, please refer to Figure 7 and Figure 8 During the process of resetting the filter trough 501 toward the discharge box 4 and the feed box 607, since the scraper 403 has a conical cross-section, its inclined side abuts against the baffle 504 to drive the scraper 403 to move upward and reset to the receiving box 402. At this time, the extension plate 702 at the end of the supporting plate 7 just moves to the bottom of the guide wheel 408, so the supporting plate 7 can support the guide wheel 408 again during the resetting process.

[0060] In addition, a wedge plate 605 is provided at the connecting position between the second inclined groove 604 and the first straight guide groove 608, and the wedge plate 605 is slidably arranged in the slide groove opened at the end of the guide plate 601, and a spring mechanism fixed to the wedge plate 605 is fixedly arranged in the slide groove, wherein the inclined surface 606 of the wedge plate 605 is located in a direction away from the first straight guide groove 608; it can be explained that in order to prevent the third spring 703 from driving the pin shaft 701 to move along the first straight guide groove 608 later, when the pin shaft 701 moves along the second inclined groove 604 to the first straight guide groove 608, the pin shaft 701 first slides and abuts against the inclined surface 606 to drive the wedge plate 605 to retract into the slide groove, and when the pin shaft 701 moves into the first straight guide groove 608, the spring mechanism can drive the wedge plate 605 to reset, so as to achieve the effect of limiting the pin shaft 701 and prevent the pin shaft 701 from retreating to the second inclined groove 604.

[0061] Furthermore, in order to control the driving cylinder 603, as Figure 2 As shown, in this embodiment, a limit frame 3 is arranged in the storage box 202, a limit rod 302 is slidably arranged in the limit frame 3, a floating ball 301 is arranged at the bottom of the limit rod 302, a lifting frame 303 is arranged on the top of the limit rod 302, two groups of first electrode sheets 304 are arranged at the bottom of the lifting frame 303, and two groups of second electrode sheets 305 are correspondingly arranged on the limit frame 3, and the first electrode sheet 304 and the second electrode sheet 305 are electrically connected to the driving cylinder 603 through the controller; specifically, the floating ball 301 of this embodiment is made of polyethylene or polypropylene plastic to avoid corrosion by the absorbent. It can be explained that in the initial In the initial state, based on the buoyancy of the absorbent on the float 301, the lifting frame 303 is located at the corresponding initial height. When the filter tank 501 is blocked, the falling speed of the absorbent slows down, so that the circulating pump 209 cannot be replenished in time after extracting the absorbent in the storage box 202. Then the liquid level of the storage box 202 decreases, and the float 301 drives the lifting frame 303 to descend synchronously. When the first electrode sheet 304 contacts the second electrode sheet 305, an electrical signal is generated and sent to the driving cylinder 603 through the controller, so that the driving cylinder 603 performs a corresponding action to clean the filter tank 501.

[0062] A method for treating a tail gas treatment device for purifying zirconium tetrachloride with molten salt, comprising the following steps:

[0063] See also Figure 1-Figure 2 After the exhaust gas is preliminarily treated by the pre-processor 1, it enters the purification tower 201 of the first purification module 2 through the outlet pipe 102 and the inlet pipe 203;

[0064] The circulation pump 209 extracts the absorbent in the storage tank 202 through the circulation pipe 210 and transports it to the annular spray pipe 208. The atomizing nozzle 211 sprays the absorbent to purify the tail gas entering the spray chamber 206.

[0065] The purified exhaust gas passes through the gap between the partition 205 and the bottom of the purification tower 201 and enters the exhaust chamber 207, and is finally discharged through the exhaust pipe 204;

[0066] The exhaust gas is discharged after dust removal through the purification water tower 105 and the dust removal pipe 103;

[0067] The absorbent after spraying can fall into the storage tank 202 again for recycling.

[0068] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships 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 direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0069] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A tail gas treatment device for molten salt purification of zirconium tetrachloride, comprising a pre-treatment device (1) storing a sodium hydroxide solution, wherein the pre-treatment device (1) is provided with a gas transmission pipeline (101) and a gas outlet pipeline (102); It is characterized in that It also comprises a purification module (2) connected to the air outlet pipe (102), the purification module (2) comprising a purification tower (201), a partition (205) being provided in the purification tower (201), the partition (205) dividing the interior of the purification tower (201) into a spray chamber (206) and an exhaust chamber (207), the top of the purification tower (201) being connected to an air inlet pipe (203), the other end of the air inlet pipe (203) being in communication with the air outlet pipe (102), and the top of the purification tower (201) being also connected to an exhaust pipe (204); The bottom of the purification tower (201) is connected to the storage box (202), a circulation pump (209) is arranged on one side of the storage box (202), the circulation pump (209) is connected to an annular spray pipe (208) arranged in the spray chamber (206) through a circulation pipe (210), and a plurality of groups of atomizing nozzles (211) are arranged in a circumferential array on the inner side of the annular spray pipe (208); A filter module is provided at the connection end between the purification tower (201) and the storage box (202), and the filter module is used to filter the precipitate generated after the absorbent reacts with the tail gas; A discharge box (4) is arranged at the bottom of the purification tower (201), a feed box (607) is arranged at the top of the storage box (202), and the filter module comprises a filter plate (5) slidably arranged between the discharge box (4) and the feed box (607), two groups of filter slots (501) are symmetrically arranged on the filter plate (5), and a plurality of groups of filter holes (503) are evenly arranged at the bottom of the filter slots (501); Wherein, one side of the filter plate (5) is fixed to a driving end of a driving cylinder (603) fixedly arranged on the storage box (202); The first sealing plates (401) are symmetrically fixedly arranged on both sides of the bottom of the discharge box (4), and the second sealing plates (409) are symmetrically fixedly arranged on both sides of the top of the feed box (607); A baffle plate (504) is slidably provided on one side of the two groups of filter tanks (501) that are away from each other, two groups of guide rods (507) are symmetrically fixedly arranged on the outside of the baffle plate (504), two groups of L-shaped brackets (506) are correspondingly fixedly arranged on the filter plate (5), the guide rod (507) is slidably connected to the L-shaped bracket (506), and a first spring (502) is provided on the guide rod (507); Wherein, a containing box (402) is fixedly arranged on the first sealing plate (401), a scraper (403) is slidably embedded in the containing box (402), the cross section of the bottom of the scraper (403) is conical, and the scraper (403) is connected to a lifting part that drives the scraper (403) to rise and fall; The lifting part comprises an L-shaped support plate (404) fixedly arranged on the scraper plate (403); a support shaft (405) slidably connected to the L-shaped support plate (404) is fixedly arranged on the first sealing plate (401); and a second spring (406) is provided on the support shaft (405); Wherein, connecting frames (407) are fixedly arranged at both ends of the scraper (403), and the connecting frame (407) is rotatably arranged with guide wheels (408) at one end facing the storage box (202), and supporting plates (7) for supporting each group of guide wheels (408) are arranged on both sides of the filter plate (5), and the supporting plates (7) are connected to a driving mechanism for driving them to move toward or away from the filter plate (5); The pushing mechanism comprises a guide frame (6) fixedly arranged on the storage box (202), a guide plate (601) being arranged inside the guide frame (6), the guide plate (601) being fixed to the storage box (202), an outer edge surface of the guide plate (601) and an inner edge surface of the guide frame (6) enclosing a guide groove mechanism, the guide groove mechanism comprising two groups of parallel and staggered first straight guide grooves (608) and second straight guide grooves (610), the two ends of the first straight guide groove (608) and the second straight guide groove (610) being respectively connected to the second inclined groove (604) through a first inclined groove (609); Each group of the supporting plates (7) is fixed to the filter plate (5) via a telescopic cylinder (704), a third spring (703) is provided on the telescopic cylinder (704), a pin shaft (701) embedded in the guide groove mechanism is fixedly arranged at the bottom of the supporting plates (7), and an extension plate (702) is fixedly arranged at the end of each group of the supporting plates (7).

2. The tail gas treatment device for purifying zirconium tetrachloride from molten salt according to claim 1, characterized in that: The storage box (202) is provided with a collection box (602) for receiving sediment impurities.

3. A tail gas treatment device for purifying zirconium tetrachloride from molten salt according to claim 1, characterized in that: A wedge plate (605) is provided at the connection position between the second inclined groove (604) and the first straight guide groove (608), the wedge plate (605) is slidably arranged in a slide groove opened at the end of the guide plate (601), and a spring mechanism fixed to the wedge plate (605) is fixedly arranged in the slide groove; Wherein, the inclined surface (606) of the wedge-shaped plate (605) is located in a direction away from the first straight guide groove (608).

4. A tail gas treatment device for purifying zirconium tetrachloride from molten salt according to claim 1, characterized in that: A limiting frame (3) is arranged in the storage box (202), a limiting rod (302) is slidably arranged in the limiting frame (3), a floating ball (301) is arranged at the bottom of the limiting rod (302), a lifting frame (303) is arranged on the top of the limiting rod (302), two groups of first electrode sheets (304) are arranged at the bottom of the lifting frame (303), and two groups of second electrode sheets (305) are correspondingly arranged on the limiting frame (3), and the first electrode sheets (304) and the second electrode sheets (305) are electrically connected to the driving cylinder (603) through a controller.

Images