Liquid sulfur storage and transportation tail gas treatment system and method

Abstract

The present invention relates to the technical field of liquid sulfur storage and transportation tail gas treatment, and discloses a liquid sulfur storage and transportation tail gas treatment system and method. By washing tail gas and crushing, under liquid, sulfur blocks obtained by washing, a piping can be prevented from being blocked during a conveying process while recovering sulfur, and waste gas generated after the tail gas is washed will become normal-temperature gas, facilitating pressurized conveying of the waste gas; and during the pressurized conveying of the waste gas to a combustion-supporting air piping of a sulfur production reaction furnace, since sulfur vapor has been fully washed and recovered, blocking of the piping and a pump due to high-temperature sulfur-containing vapor and normal-temperature combustion-supporting air being mixed and solidified into sulfur solids can be avoided. By filtering a slurry from a washing column and discharging a sulfur particle filter cake obtained by filtering into a sulfur storage device provided between a liquid sulfur supply piping and a liquid sulfur storage and transportation apparatus, the filter cake in the sulfur storage device can be conveyed to the liquid sulfur storage and transportation apparatus with feed liquid sulfur from the liquid sulfur supply piping, thereby achieving on-site reuse of sulfur resources in the tail gas.

Description

Liquid sulfur storage and transportation tail gas treatment system and method

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202411331557.3, filed September 24, 2024, entitled “Sulfur Loading Tail Gas Treatment System and Method,” which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of liquid sulfur storage and transportation tail gas treatment, in particular to a liquid sulfur storage and transportation tail gas treatment system and method. BACKGROUND

[0004] Sulfur production in refining enterprises is mostly carried out using the Claus process. Liquid sulfur produced by the Claus sulfur recovery process usually contains a certain amount of H2S, sulfur vapor, and SO2. In order to ensure the safe processing or transportation of liquid sulfur, the dissolved H2S must be removed first, so that its volume fraction meets the requirement of less than 10 x 10 -6 After the liquid sulfur is treated by degassing, it enters the liquid sulfur storage tank or is directly sent to the molding equipment, etc. The gas released in the gas phase space of the liquid sulfur pool due to degassing contains trace amounts of H2S, sulfur vapor, and SO2, which must be treated, otherwise it will pollute the environment and harm the health of the site operators. Sulfur vapor is also emitted during the storage and loading of liquid sulfur in the liquid sulfur tank, polluting the environment. There are currently two ways to treat the waste gas after liquid sulfur degassing: one is to directly introduce it into a incinerator to burn and convert it into SO2, which is then discharged into the atmosphere, and the other is to introduce the waste gas into a sulfur recovery device (Claus reaction furnace or hydrogenation reactor) for treatment.

[0005] Patent CN205590290U discloses a liquid sulfur storage tank degassing device, which includes a sulfur seal tank, a water washing tower, a cooling pipe, a sulfur powder filter, a water circulating pump, an alkali washing reactor, an alkali tank, an alkali residue tank, a liquid ring vacuum pump, an alkali pump, a diffusion pipe, and other equipment. The process of this liquid sulfur storage tank desulfurization device is relatively complex and costly, and there is a problem of system blockage during the water washing process of sulfur vapor.

[0006] Patent CN203558849U discloses a sulfur storage tail gas and liquid sulfur degassing comprehensive treatment system, which introduces the degassing of the liquid sulfur pool to an acid gas incinerator through the tail gas of the liquid sulfur degassing device. The sulfur storage tail gas and liquid sulfur degassing comprehensive treatment system can reduce equipment investment and directly reduce the sulfur content of the tail gas entering the tail gas incinerator, and the direct impact of SO2 emission from the tail gas chimney is reduced to zero. However, there is a problem of sulfur vapor condensation and pipeline blockage at the cold-hot interface when sulfur vapor in the degassing process mixes with the combustion air of the acid gas incinerator.

[0007] For the treatment of sulfur loading tail gas, the Chinese invention patents with publication numbers CN109821386B, CN109806750B and CN109821385B all disclose a sulfur loading tail gas treatment method. A liquid ring pump is used. Under the vacuum suction provided by the liquid ring pump, the loading overflow tail gas sequentially passes through the air suction pipeline, the tee pipe installed on the air suction pipeline and the air inlet pipeline into the liquid ring pump. In this process, most of the sulfur vapor in the loading overflow tail gas is pre-cooled and cooled to become sulfur and is solidified on the wall of the air suction pipeline. The remaining loading overflow tail gas enters the liquid ring pump through the tee pipe on the air suction pipeline and the air inlet pipeline and is mixed with the liquid ring formed by the lye in the liquid ring pump. The hydrogen sulfide in the loading overflow tail gas reacts with the lye to form a non-toxic product for purification and emission up to the standard. The sulfur vapor is condensed into sulfur solids. The sulfur solids are deposited at the bottom of the cleaning tank and are finally collected through the blowdown pipeline. However, this treatment method has the following problems: (1) most of the sulfur vapor is condensed into sulfur and is solidified on the wall of the air suction pipeline, which not only causes sulfur loss but also causes the air suction pipeline to be blocked, affecting the treatment efficiency; (2) in the liquid ring washing process, the high-temperature sulfur-containing vapor has a gas-liquid contact cold-hot interface sulfur vapor condensation problem, which is easy to form blocky sulfur to cause system blockage; (3) the lye is used to treat the loading overflow tail gas, which produces lye residue; (4) the specific destination and treatment of the collected sulfur solids are not considered.

[0008] In addition, the Chinese invention patent with publication number CN114028886A discloses another treatment method for liquid sulfur loading process fugitive smoke. Specifically, the fugitive smoke generated during the loading process first enters the cooler pipe passage of the cooling unit and is cooled to normal temperature by the circulating water in the heat exchange pipe in the shell side. Most of the sulfur in the smoke is crystallized and adheres to the inner wall of the pipe passage. The remaining sulfur smoke continues to enter the spray tower. In the process of being fully contacted with the spray liquid in the opposite direction, the sulfur is precipitated from the gas phase and falls to the bottom of the spray tower together with the spray liquid and enters the hydrocyclone for solid-liquid separation. The separated solid sulfur particles are discharged from the conical collection port at the bottom of the separator. However, this treatment method has the following problems: (1) most of the sulfur in the smoke is crystallized and adheres to the inner wall of the pipe passage, which causes the pipe passage to be blocked and affects the treatment efficiency; (2) the specific destination and treatment of the collected sulfur particles are not considered. SUMMARY

[0009] The purpose of the present application is to solve at least one of the problems existing in the above-mentioned existing liquid sulfur storage and transportation tail gas treatment method.

[0010] To achieve the above-mentioned purpose, the present application provides a liquid sulfur storage and transportation tail gas treatment system, which comprises:

[0011] a sulfur storage device having a liquid sulfur inlet, a liquid sulfur outlet, and a filter cake inlet, the liquid sulfur inlet being in communication with the liquid sulfur supply line;

[0012] a liquid sulfur storage and transportation device having a liquid sulfur inlet and a tail gas outlet, the liquid sulfur inlet of the liquid sulfur storage and transportation device being in communication with the liquid sulfur outlet of the sulfur storage device;

[0013] a washing tower having a washing liquid inlet, a tail gas inlet, and a slurry outlet, the tail gas inlet being in communication with the tail gas outlet of the liquid sulfur storage and transportation device, the washing tower being used to wash the tail gas from the tail gas inlet with the washing liquid from the washing liquid inlet, and to form a slurry containing sulfur particles by under-liquid crushing of the washed sulfur lumps and then discharge the slurry from the slurry outlet;

[0014] a filter having a slurry inlet and a filter cake outlet, the slurry inlet being in communication with the slurry outlet of the washing tower to allow the slurry to enter the filter for filtration, and the filter cake outlet being in communication with the filter cake inlet of the sulfur storage device to allow the filtered sulfur filter cake to enter the sulfur storage device.

[0015] The liquid sulfur storage and transportation tail gas treatment system of the present application can avoid plugging the pipeline during the transportation to the filter by washing the collected tail gas in the washing tower and under-liquid crushing the washed sulfur lumps to form a slurry containing sulfur particles and washing liquid, and can recover the sulfur at the same time. The waste gas produced after the tail gas is washed in the washing tower becomes normal temperature gas, which is beneficial to the pressurized transportation of the waste gas. When the waste gas is pressurized and transported to the combustion air pipeline of the sulfur production reaction furnace, the sulfur vapor has been fully washed and recovered, so that the high-temperature sulfur-containing vapor and the normal-temperature combustion air are mixed and solidified into sulfur solids to plug the pipeline and the pump. The slurry from the washing tower is filtered in the filter, and the sulfur particle filter cake is discharged into the sulfur storage device by setting the sulfur storage device between the filter and the liquid sulfur storage and transportation device. The filter cake in the sulfur storage device is transported to the liquid sulfur storage and transportation device together with the feed liquid sulfur (i.e. liquid sulfur) from the liquid sulfur supply line, so as to realize the on-site recycling of the sulfur resource in the tail gas.

[0016] In some embodiments, the sulfur storage device is a pipeline sulfur storage device.

[0017] In some embodiments, the inside of the washing tower comprises a washing section and a crushing section arranged in sequence from top to bottom, the washing liquid inlet is arranged at the upper part of the washing section, the tail gas inlet is arranged at the lower part of the washing section, and the slurry outlet is arranged at the bottom of the washing tower, the crushing section is provided with a stirring assembly, crushing balls and filter partitions, the filter partitions are arranged in sequence above the slurry outlet, the crushing balls are arranged above the filter partitions, and the stirring assembly is arranged to stir the crushing balls.

[0018] In some embodiments, the washing tower further comprises a waste gas outlet arranged at the top of the washing tower.

[0019] In some embodiments, the waste gas outlet is used to communicate with a sulfur production reaction furnace.

[0020] In some embodiments, the washing section is provided with a spraying device communicating with the washing liquid inlet.

[0021] In some embodiments, the outside of the washing tower is provided with a motor, the stirring assembly comprises a rotating shaft and a plurality of stirring rods, the rotating shaft is inserted into the crushing section from the bottom of the washing tower upwards, the bottom end of the rotating shaft is drivingly connected with the motor, and the plurality of stirring rods are arranged on the rotating shaft in sequence and above the filter partitions.

[0022] In some embodiments, the washing section and the crushing section are coaxially arranged in sequence from top to bottom.

[0023] In some embodiments, the filter holes of the filter partitions have a diameter of 0.5-5 mm, preferably 1-3 mm.

[0024] In some embodiments, the open area of the filter partitions is greater than or equal to the cross-sectional area of the slurry outlet, preferably, the open area of the filter partitions is 2-10 times the cross-sectional area of the slurry outlet.

[0025] In some embodiments, the liquid sulfur supply pipeline directly communicates with the liquid sulfur inlet of the sulfur storage device.

[0026] In some embodiments, the filter cake inlet is located at the top of the sulfur storage device, the filter is located above the sulfur storage device, and the filter cake outlet of the filter is located at the bottom of the filter and corresponds to the filter cake inlet.

[0027] In some embodiments, heating devices are arranged on the liquid sulfur supply pipeline, the sulfur storage device, and the communication pipeline between the liquid sulfur outlet of the sulfur storage device and the liquid sulfur inlet of the liquid sulfur storage and transportation device.

[0028] In some embodiments, a heating facility is arranged on the communication pipeline between the tail gas outlet of the liquid sulfur storage and transportation equipment and the tail gas inlet of the washing tower.

[0029] In some embodiments, the heating facility is electric heating or steam heating.

[0030] In some embodiments, the heating temperature of the heating facility is 130-160℃.

[0031] In some embodiments, the filter is a centrifugal filter, a plate-and-frame filter or a scraper filter.

[0032] In some embodiments, the filter further has a filtrate outlet which is in communication with the washing liquid inlet of the washing tower to pass filtrate into the washing tower for recycling.

[0033] In some embodiments, the filtering precision of the filter is 1-200μm, preferably 25-150μm.

[0034] In some embodiments, the filtering temperature of the filter is 20-60℃.

[0035] In some embodiments, the liquid sulfur storage and transportation tail gas treatment system comprises a plurality of filters in parallel, and the plurality of filters are arranged to filter in turn.

[0036] In some embodiments, the filter which is filtering is stopped and switched to the next filter for filtering when the pressure difference between the inlet and outlet of the filter reaches a preset value.

[0037] In some embodiments, the stopped filter is arranged to discharge filter cake to the sulfur storage tank after the feeding of the liquid sulfur storage and transportation equipment is completed.

[0038] In some embodiments, the preset value is ≥50kPa, preferably 50-500kPa.

[0039] In some embodiments, the liquid sulfur storage and transportation tail gas treatment system further comprises an intermediate tank which has a filtrate inlet and a washing liquid outlet, the filtrate inlet of the intermediate tank is in communication with the filtrate outlet of the filter, and the washing liquid outlet of the intermediate tank is in communication with the washing liquid inlet of the washing tower.

[0040] In some embodiments, a slurry delivery pump is arranged on the communication pipeline between the slurry outlet of the washing tower and the slurry inlet of the filter.

[0041] In some embodiments, the intermediate tank further has a make-up liquid inlet for supplementing washing liquid into the intermediate tank.

[0042] In some embodiments, a circulation pump is arranged on the communication pipeline between the scrubbing liquid outlet of the intermediate tank and the scrubbing liquid inlet of the scrubbing tower, and the circulation pump is used to deliver the scrubbing liquid in the intermediate tank into the scrubbing tower.

[0043] In some embodiments, a drainage pipeline is arranged on the communication pipeline between the circulation pump and the scrubbing liquid inlet of the scrubbing tower.

[0044] In some embodiments, the liquid sulfur storage and transportation tail gas treatment system further comprises an air induction device, which is in communication with the waste gas outlet of the scrubbing tower, and the air induction device is used to provide collection power for the tail gas of the liquid sulfur storage and transportation device, and to introduce the tail gas into the scrubbing tower, and to lead the waste gas formed after the scrubbing of the tail gas out of the scrubbing tower.

[0045] In some embodiments, the liquid sulfur storage and transportation tail gas treatment system further comprises a purge pipeline, which is in communication with the liquid sulfur supply pipeline.

[0046] In some embodiments, the purge pipeline comprises an inert gas purge pipeline and / or a waste gas purge pipeline, and the waste gas purge pipeline is in communication with the waste gas outlet of the scrubbing tower and the liquid sulfur supply pipeline.

[0047] Another aspect of the present application provides a liquid sulfur storage and transportation tail gas treatment method, which comprises:

[0048] S1. A sulfur storage device is arranged between the liquid sulfur supply pipeline and the liquid sulfur storage and transportation device, so that the liquid sulfur supplied by the liquid sulfur supply pipeline flows through the sulfur storage device and is loaded into the liquid sulfur storage and transportation device;

[0049] S2. The tail gas generated by the liquid sulfur storage and transportation device is collected and scrubbed, and the scrubbed sulfur block is crushed under liquid to form a slurry containing sulfur particles;

[0050] S3. The slurry is filtered, and the filter cake is discharged into the sulfur storage device, and the filter cake is loaded into the liquid sulfur storage and transportation device together with the liquid sulfur supplied by the liquid sulfur supply pipeline.

[0051] The tail gas treatment method of the liquid sulfur storage and transportation of the present application can avoid the pipeline blockage during the transportation process while recovering the sulfur, and the waste gas generated after the tail gas is washed can become normal temperature gas, which is beneficial to the pressurized transportation of the waste gas. When the waste gas is pressurized and transported to the combustion air pipeline of the sulfur production reaction furnace, the high-temperature sulfur-containing vapor has been fully washed and recovered, so that the high-temperature sulfur-containing vapor and the normal-temperature combustion air are prevented from being mixed and solidified into sulfur solids to block the pipeline and the pump. The filter cake filtered from the slurry is introduced into the sulfur storage device arranged between the liquid sulfur supply pipeline and the liquid sulfur storage and transportation equipment, so that the sulfur filter cake in the sulfur storage device can be transported to the liquid sulfur storage and transportation equipment together with the incoming liquid sulfur from the liquid sulfur supply pipeline, thereby realizing the on-site recycling of the sulfur resources in the tail gas.

[0052] In some embodiments, in step S3, the filter cake in the sulfur storage device is liquefied after being heated, and then is loaded into the liquid sulfur storage and transportation equipment together with the incoming liquid sulfur.

[0053] In some embodiments, in step S2, the sulfur is quickly crushed into sulfur particles with a particle size of 0.5-5 mm, preferably 1-3 mm.

[0054] In some embodiments, the method comprises washing the tail gas with the filtrate generated after the slurry is filtered.

[0055] In some embodiments, the method comprises using the intermediate tank to buffer the filtrate before use.

[0056] In some embodiments, the method comprises supplementing fresh washing liquid to the intermediate tank.

[0057] In some embodiments, the method comprises controlling the temperature in the intermediate tank to be 20-60℃.

[0058] In some embodiments, the method comprises purging the liquid sulfur supply pipeline and the liquid sulfur transportation line downstream thereof with inert gas or the waste gas generated after the tail gas is washed.

[0059] In some embodiments, in step S1, the liquid sulfur supply pipeline and the sulfur storage device transport the liquid sulfur at high temperature into the liquid sulfur storage and transportation equipment.

[0060] In some embodiments, in step S2, the tail gas generated by the liquid sulfur storage and transportation equipment is collected at high temperature.

[0061] In some embodiments, the method is performed by using the liquid sulfur storage and transportation tail gas treatment system described above.

[0062] Other features and advantages of the present application will be further described in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0063] The accompanying drawings, which form a part of the detailed description, illustrate the preferred embodiments of the present application and, together with the detailed description, serve to explain the principles of the present application. In the drawings:

[0064] Fig. 1 is a schematic diagram of an embodiment of the tail gas treatment system for liquid sulfur storage and transportation according to the present application;

[0065] Fig. 2 is a schematic diagram of the scrubber according to the present application.

[0066] BRIEF DESCRIPTION OF DRAWINGS 1 - liquid sulfur supply line, 2 - tail gas collection line, 3 - scrubber, 301 - exhaust gas outlet, 302 - scrubbing liquid inlet, 303 - spraying device, 304 - tail gas inlet, 305 - slurry outlet, 306 - rotating shaft, 307 - stirring rod, 308 - crushing ball, 309 - filter partition, 310 - motor, A - scrubbing section, B - crushing section, 4 - slurry pump, 5 - first filter, 6 - second filter, 7 - intermediate tank, 8 - circulating pump, 9 - induced draft device, 10 - exhaust gas discharge line, 11 - exhaust gas purge line, 12 - inert gas purge line, 13 - liquid sulfur feed line, 14 - heat tracing device, 15 - liquid sulfur storage and transportation device, 16 - liquid discharge line, 17 - sulfur storage vessel, 18 - liquid make-up line. DETAILED DESCRIPTION

[0067] The embodiments of the present application will be described in further detail below with reference to the accompanying drawings. The following detailed description and appended drawings describe and demonstrate aspects of the present application. The detailed description and specific examples, however, should not be construed as limiting the scope of the present application. Many alternatives not explicitly described lie within the scope of the present application, as defined by the following claims. Those skilled in the art will recognize that some features of the embodiments described can be substantial improvements over, for example, conventional systems and methods.

[0068] These embodiments are provided so that this application will be thorough and complete, and fully convey the scope of the application to those skilled in the art. No limitation is intended to the components and steps set forth in these embodiments by virtue of their being described in the dependent

[0069] It should be noted that in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is greater than or equal to two; The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the present application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0070] In addition, "first", "second" and similar words used in the present application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements.

[0071] It should also be noted that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; It can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. When it is described that a specific device is located between the first device and the second device, there can be an intermediate device between the specific device and the first device or the second device, or there can be no intermediate device.

[0072] All terms used in the present application have the same meaning as understood by those skilled in the art to which the present application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or excessively formalized sense, unless otherwise defined explicitly herein.

[0073] Techniques, methods and equipment known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be considered as part of the specification.

[0074] One aspect of the present application provides a liquid sulfur storage and transportation tail gas treatment system, see Figure 1, comprising:

[0075] The sulfur storage device 17 has a liquid sulfur inlet, a liquid sulfur outlet and a filter cake inlet, the liquid sulfur inlet is communicated with the liquid sulfur supply pipeline 1;

[0076] The liquid sulfur storage and transportation equipment 15 has a liquid sulfur inlet and a tail gas outlet, and the liquid sulfur inlet of the liquid sulfur storage and transportation equipment 15 is communicated with the liquid sulfur outlet of the sulfur storage device 17;

[0077] The washing tower 3 has a washing liquid inlet 302, a tail gas inlet 304 and a slurry outlet 305, the tail gas inlet 304 is communicated with the tail gas outlet of the liquid sulfur storage and transportation equipment 15, and the washing tower 3 is used for washing the tail gas entering from the tail gas inlet 304 by using the washing liquid entering from the washing liquid inlet 302, and performing liquid under-pulverization on the washed sulfur block to form a slurry containing sulfur particles and then discharging the slurry from the slurry outlet 305;

[0078] The filter has a slurry inlet and a filter cake outlet, the slurry inlet is communicated with the slurry outlet of the washing tower 3 to make the slurry enter the filter for filtration, and the filter cake outlet is communicated with the filter cake inlet of the sulfur storage device 17 to make the sulfur filter cake obtained by filtration enter the sulfur storage device 17.

[0079] The liquid sulfur storage and transportation tail gas in the present application can be sulfur-containing waste gas such as liquid sulfur pool degassing, liquid sulfur storage tank breathing exhaust or liquid sulfur loading escape gas. The liquid sulfur storage and transportation equipment 15 can be a liquid sulfur pool, a liquid sulfur storage tank or a liquid sulfur tank truck.

[0080] The liquid sulfur storage and transportation tail gas treatment system of the present application can avoid plugging the pipeline during the process of transporting to the filter by adopting the washing tower 3 to wash the collected tail gas and performing liquid under-pulverization on the washed sulfur block to form a slurry composed of sulfur particles and washing liquid, and can recover sulfur while avoiding plugging the pipeline, and the waste gas generated after the tail gas is washed by the washing tower becomes normal temperature gas, which is beneficial to the pressurized transportation of the waste gas, and when the waste gas is pressurized and transported to the combustion air pipeline of the sulfur production reaction furnace, since the sulfur vapor has been fully washed and recovered, the high-temperature sulfur-containing vapor and the normal-temperature combustion air are prevented from being mixed to condense into sulfur solid to plug the pipeline and the pump; by adopting the filter to filter the slurry from the washing tower 3 and arranging the sulfur storage device 17 between the filter and the liquid sulfur storage and transportation equipment 15, the filtered sulfur particle filter cake can be discharged into the sulfur storage device 17; by arranging the sulfur storage device 17 between the liquid sulfur supply pipeline 1 and the liquid sulfur storage and transportation equipment 15, the filter cake in the sulfur storage device 17 can be transported to the liquid sulfur storage and transportation equipment 15 together with the feed liquid sulfur (i.e. liquid sulfur) from the liquid sulfur supply pipeline 1, so that the sulfur resource in the tail gas is recycled in place.

[0081] In the present application, the filter also has a filtrate outlet, and the filtrate outlet can be communicated with the washing liquid inlet of the washing tower 3 to make the filtrate enter the washing tower 3 for recycling. The use of the filtrate in the washing tower 3 can realize the recycling of the washing liquid, thereby reducing the processing cost and reducing the waste of resources.

[0082] In the present application, the sulfur storage device 17 can have any appropriate structure. For example, as shown in FIG. 1, the sulfur storage device 17 can be a pipeline sulfur storage device. By using a pipeline sulfur storage device, the inlet and outlet of the sulfur storage device are matched with the fluid mechanics of the main pipeline, without the need to make major changes to the pipeline, so as to achieve "power sharing", on the one hand, to ensure that the liquid sulfur in the pipeline has sufficient flow rate to push the liquefied sulfur in the sulfur storage device to flow together, on the other hand, to reduce resistance loss and avoid dead zone sulfur retention, and on the other hand, to facilitate temperature control of the sulfur storage device, to achieve rapid heating and avoid large thermal inertia causing liquefaction delay.

[0083] In the present application, the washing liquid is a liquid that does not pollute and does not react with the tail gas. The washing liquid is preferably purified water.

[0084] In the present application, the washing temperature of the washing tower 3 can be controlled to be 20-60℃, and specifically, circulating cooling water can be used for temperature control to ensure the quenching effect of sulfur vapor in the tail gas, so that the sulfur vapor is fully condensed into solid phase and falls to the crushing section of the washing tower (to be introduced below).

[0085] In the present application, the washing tower can have any appropriate structure. For example, the washing tower can be the sulfur vapor recovery tower in the Chinese invention patent with publication number CN116832567A applied by the applicant of the present application. For another example, referring to FIG. 2, another embodiment of the washing tower improved on the basis of CN116832567A according to the present application, the washing tower 3 has a waste gas outlet 301, a washing liquid inlet 302, a tail gas inlet 304 and a slurry outlet 305, the inside of the washing tower 3 includes a washing section A and a crushing section B distributed upward and downward, the waste gas outlet 301 is arranged at the top of the washing tower 3, the washing liquid inlet 302 is arranged at the upper part of the washing section A, the tail gas inlet 304 is arranged at the lower part of the washing section A, and the slurry outlet 305 is arranged at the bottom of the washing tower 3; the washing section A is provided with a spraying facility 303, the spraying facility 303 is communicated with the washing liquid inlet 302 and is used for spraying the washing liquid downward; the crushing section B is provided with a stirring assembly, crushing balls 308 and a filter partition plate 309, the filter partition plate 309 is arranged in the upper part of the slurry outlet 305 in a spaced manner, the crushing balls 308 are stacked above the filter partition plate 309, and the stirring assembly is used for stirring the crushing balls 308; the stirring assembly includes a rotating shaft 306 and a plurality of stirring rods 307, the rotating shaft 306 is inserted into the crushing section B upward from the bottom of the washing tower 3, the plurality of stirring rods 307 are arranged on the rotating shaft 306 in the axial direction of the rotating shaft 306 and above the filter partition plate 309 in a spaced manner, and the outside of the washing tower 3 is provided with a motor 310, the motor 310 is drivingly connected with the bottom end of the rotating shaft 306 and is used for driving the rotating shaft 306 to rotate around its own axis.

[0086] The filter partition 309 can intercept the large-particle sulfur which is not sufficiently pulverized, so that it continues to stay in the pulverizing section until it is pulverized to a passable particle size, avoiding the large particles from entering the washing pump through the slurry outlet 305 at the bottom of the washing tower, causing pipeline blockage or pump damage.

[0087] The rotation speed of the rotating shaft 306 is adjustable, and the rotation speed is preferably 50-1000 revolutions per minute (rpm). The wide rotation speed range can realize full coverage from coarse crushing to nanoscale pulverization, thereby controlling the pulverizing particle size to match the interception particle size of the filter.

[0088] Compared with the hollow tube structure of the rotating shaft and the small holes arranged on the tube wall in CN116832567A, the washing tower 3 of the present application adopts a solid rotating shaft 306 and a filter partition 309 arranged at the bottom of the pulverizing section. The filter partition 309 has the same diameter as the washing tower and has a large effective flow area and a uniform flow speed, which can better realize the effect of discharging liquid carrying sulfur particles. The filter partition 309 is arranged at the bottom of the pulverizing section, and the large particles intercepted will continue to be ground until they reach a passable particle size before being discharged. In CN116832567A, the rotating shaft is arranged radially with holes, and the small particles are controlled to approach and pass through the small holes to achieve filtration. Due to the presence of the pulverizing balls scattered in the pulverizing section, the centrifugal field effect is limited, and there is a gap between the lower end of the rotating shaft and the bottom shell of the pulverizing section, which is easy to cause accumulation in the dead zone at the bottom.

[0089] Compared with the arrangement of the motor above the pulverizing section and the insertion of the rotating shaft into the pulverizing section from the top of the pulverizing section in CN116832567A, the washing tower 3 of the present application inserts the rotating shaft 306 into the pulverizing section B from the bottom of the washing tower 3, and independently arranges the motor 310 outside the washing tower. This can lower the center of gravity of the stirring device, improve the reliability and stability of the stirring device, and facilitate maintenance and repair.

[0090] Compared with the arrangement of the water washing section and the pulverizing section in different shafts in CN116832567A, the present application arranges the washing section A and the pulverizing section B in the same shaft. The cooling sulfur can be directly vertically dropped into the pulverizing section below by gravity through the vertical channel, realizing "falling and crushing immediately", avoiding material retention and accumulation or blockage in the form of inclined slide, and the device structure is compact, the space utilization rate is high, and the support structure is more stable.

[0091] Compared with the arrangement of the stirring rods in a staggered manner on the rotating shaft in CN116832567A, the present application arranges the stirring rods 307 in a corresponding manner on the rotating shaft 306, and fills the pulverizing balls 308 to cover all the stirring rods 307. This can balance the force on the rotating shaft, improve the mixing and stirring effect of the pulverizing balls, and reduce the shaft load, thereby saving energy consumption.

[0092] In addition, it should be noted that in the present application, the washing section A and the crushing section B are cylindrical shell structures. The waste gas outlet 301 of the washing tower 3 can be communicated with a sulfur production reaction furnace to be mixed with combustion air in the sulfur production reaction furnace.

[0093] In the present application, the filter hole diameter of the filter partition 309 can be 0.5-5 mm, preferably 1-3 mm. In this way, the sulfur particles can be filtered by classification, and the pipeline can be prevented from being blocked by the sulfur particles during transportation.

[0094] In the present application, the opening area of the filter partition 309 is greater than or equal to the cross-sectional area of the slurry outlet 305, and the opening area of the filter partition 309 is preferably 2-10 times the cross-sectional area of the slurry outlet. In this way, the fluid resistance loss of the filter partition can be reduced, and at the same time, the slurry outlet has a relatively higher flow rate to effectively carry out the filtered particles out of the washing tower.

[0095] In the present application, as shown in FIG. 1, the liquid sulfur supply pipeline 1 is preferably directly communicated with the liquid sulfur inlet of the sulfur storage device 17, so that an embedded connection can be adopted, without greatly changing the feed pipeline, and the flow rate and temperature of the feed sulfur are fully utilized to realize "power sharing" and "thermal energy cooperation", and the sulfur collected by the sulfur storage device 17 is efficiently transferred to the liquid sulfur storage and transportation equipment.

[0096] In the present application, referring to FIG. 1, the liquid sulfur inlet and the liquid sulfur outlet of the sulfur storage device 17 are located at two ends of the sulfur storage device, the filter cake inlet of the sulfur storage device 17 is located at the top of the sulfur storage device, the filter is located above the sulfur storage device, and the filter cake outlet of the filter is located at the bottom of the filter, and the filter cake outlet of the filter is communicated with the filter cake inlet of the sulfur storage device. In this way, the filter cake can be smoothly and completely introduced into the sulfur storage device.

[0097] In the present application, referring to FIG. 1, the liquid sulfur supply pipeline 1, the sulfur storage device 17, and the liquid sulfur feed pipeline 13 (i.e. the communication pipeline between the liquid sulfur outlet of the sulfur storage device 17 and the liquid sulfur inlet of the liquid sulfur storage and transportation equipment 15) can be provided with a heating facility 14. By providing the heating facility 14, high-temperature transportation of the liquid sulfur can be realized, and the high-temperature sulfur vapor in the liquid sulfur can be prevented from condensing and blocking the pipeline during transportation. The sulfur cake in the sulfur storage device 17 can also be heated and liquefied, so as to be loaded into the liquid sulfur storage and transportation equipment 15 together with the incoming liquid sulfur.

[0098] In the present application, referring to FIG. 1, the communication pipeline (i.e. the tail gas collection pipeline 2) between the tail gas outlet of the liquid sulfur storage and transportation equipment 15 and the tail gas inlet 304 of the washing tower 3 can also be provided with a heating facility 14. By providing the heating facility 14, high-temperature transportation of the tail gas can be realized, and the high-temperature sulfur vapor in the tail gas can be prevented from condensing and blocking the pipeline during transportation.

[0099] In the present application, the heat tracing facility 14 can be electric heat tracing or steam heat tracing, and the heat tracing temperature of the heat tracing facility 14 is preferably 130-160 DEG C.

[0100] In the present application, the filter can be a centrifugal filter, a plate-and-frame filter or a scraper filter, etc., as long as it can separate solid and liquid. The filtering precision of the filter is preferably 1-200 microns, and further preferably 25-150 microns, which is a relatively optimal particle size range determined by comprehensively considering the entrainment speed of fluid delivery and the interception capacity of the filter, and can have excellent fluidity and be efficiently intercepted by the filter. The filtering temperature of the filter is preferably 20-60 DEG C, i.e. the temperature consistent with the washing tower, and in the case that the washing tower is temperature-controlled, the filter itself can not have a temperature control function.

[0101] In the present application, the liquid sulfur storage and transportation tail gas treatment system can include multiple filters. In some embodiments, the multiple filters can be connected in parallel with each other to rotate filtering. For example, in the embodiment shown in FIG. 1, the liquid sulfur storage and transportation tail gas treatment system includes two filters connected in parallel, i.e. a first filter 5 and a second filter 6, and the sulfur storage device 17 has two filter cake inlets corresponding to the filter cake outlets of the two filters.

[0102] In the present application, the multiple filters can rotate filtering in the following manner: when the pressure difference between the inlet and outlet of the filter being filtered reaches a preset value, the filter is stopped and the next filter is switched to perform filtering. In this case, the stopped filter is arranged to discharge the filter cake to the sulfur storage device 17 after the feeding of the liquid sulfur storage and transportation equipment 15 is completed.

[0103] In the present application, the preset value is preferably ≥50 kPa, and further preferably 50-500 kPa.

[0104] In the present application, as shown in FIG. 1, the liquid sulfur storage and transportation tail gas treatment system can further include an intermediate tank 7, which has a filtrate inlet and a washing liquid outlet. The filtrate inlet of the intermediate tank 7 is connected to the filtrate outlet of the filter, and the washing liquid outlet of the intermediate tank 7 is connected to the washing liquid inlet 302 of the washing tower 3. By arranging the intermediate tank 7 between the filter and the washing tower 3, the intermediate tank 7 mainly serves as a buffer container between process sections to balance the flow fluctuation of the up-and-down circulation, and can more stably provide the washing liquid to the washing tower 3, thereby ensuring the sulfur recovery effect of the washing tower 3.

[0105] In the present application, as shown in FIG. 1, the intermediate tank 7 can further have a make-up liquid inlet connected to a make-up liquid pipeline 18 for supplementing fresh washing liquid into the intermediate tank 7.

[0106] Compared with the CN116832567A, the present application can avoid the liquid level instability, the washing liquid flow field and the sulfur particle gravity field fluctuation problem caused by directly supplementing the washing liquid to the washing section of the sulfur vapor recovery tower, and can ensure the washing and crushing effect by using the volume of the intermediate tank 7 to buffer the flow fluctuation, and then uniformly delivering to the washing tower through the circulating pump 8.

[0107] In the present application, as shown in Figure 1, a circulating pump 8 can be arranged on the communication pipeline between the washing liquid outlet of the intermediate tank 7 and the washing liquid inlet 302 of the washing tower 3, and the circulating pump 8 can deliver the washing liquid in the intermediate tank 7 to the washing tower 3. In addition, a drainage pipeline 16 can also be arranged on the communication pipeline between the circulating pump 8 and the washing liquid inlet 302 of the washing tower 3, and the drainage pipeline 16 is used to periodically discharge a certain amount of washing liquid to avoid the accumulation of impurities in the long-term circulating liquid, and to realize the pollution replacement of the large circulating washing liquid by combining with the fresh washing liquid.

[0108] In the present application, as shown in Figure 1, a slurry delivery pump 4 can be arranged on the communication pipeline between the slurry outlet 305 of the washing tower 3 and the slurry inlet of the filter. The slurry delivery pump 4 can be a mortar pump.

[0109] In the present application, as shown in Figure 1, the liquid sulfur storage and transportation tail gas treatment system can further include an air induction device 9, which can be in communication with the exhaust gas outlet 301 of the washing tower 3. The air induction device 9 can be used to provide collection power for the tail gas of the liquid sulfur storage and transportation device 15, and introduce the tail gas into the washing tower 3. The exhaust gas formed after washing the tail gas is introduced out of the washing tower 3. The exhaust gas outlet 301 of the washing tower 3 can be connected with an exhaust gas discharge pipeline 10, and the air induction device 9 can be arranged on the exhaust gas discharge pipeline 10.

[0110] Among them, the air induction device 9 can be a liquid ring vacuum pump, a Roots blower and other conventional devices in the field.

[0111] In the present application, the liquid sulfur storage and transportation tail gas treatment system can further include a purge pipeline, which can be in communication with the liquid sulfur supply pipeline 1. By introducing the purge gas into the liquid sulfur supply pipeline 1 through the purge pipeline, the residual liquid sulfur in the liquid sulfur supply pipeline 1, the sulfur storage device 17 and the liquid sulfur feeding pipeline 13 can be blown out to the liquid sulfur storage and transportation device 15, thereby reducing the sulfur loss and avoiding the pipeline blockage caused by the cooling and condensation of liquid sulfur.

[0112] In the present application, the purge pipeline can have various embodiments. In some embodiments, an inert gas purge pipeline 12 can be provided to perform purge by supplying inert gas (such as nitrogen, noble gas) into the liquid sulfur supply pipeline 1. In other embodiments, the exhaust gas outlet 301 of the washing tower 3 can be communicated with the liquid sulfur supply pipeline 1 (such as through the exhaust gas purge pipeline 11), and the exhaust gas discharged from the washing tower 3 can be used for purge. Of course, the inert gas purge pipeline 12 and the exhaust gas purge pipeline 11 can be provided simultaneously as shown in the embodiment of FIG. 1, and in actual use, either one of the inert gas purge pipeline 12 and the exhaust gas purge pipeline 11 can be selected for purge as needed.

[0113] In another aspect of the present application, a liquid sulfur storage and transportation tail gas treatment method is provided, which comprises:

[0114] S1, a sulfur storage device 17 is arranged between the liquid sulfur supply pipeline 1 and the liquid sulfur storage and transportation equipment 15, so that the liquid sulfur supplied by the liquid sulfur supply pipeline 1 flows through the sulfur storage device 17 and is then loaded into the liquid sulfur storage and transportation equipment 15;

[0115] S2, collecting and washing the tail gas generated by the liquid sulfur storage and transportation equipment 15, and performing under-liquid crushing on the sulfur block washed out, and forming a slurry containing sulfur particles;

[0116] S3, filtering the slurry, discharging the filter cake to the sulfur storage device 17, and loading the filter cake together with the liquid sulfur supplied by the liquid sulfur supply pipeline 1 into the liquid sulfur storage and transportation equipment 15.

[0117] The liquid sulfur storage and transportation tail gas treatment method of the present application can avoid pipeline blockage during transportation by washing the tail gas and performing under-liquid crushing on the sulfur block washed out to form a slurry composed of sulfur particles and washing liquid, and can recover sulfur while avoiding pipeline blockage during transportation. In addition, the exhaust gas generated after the tail gas is washed will become a normal temperature gas, which is beneficial to the pressurized transportation of the exhaust gas. When the exhaust gas is pressurized and transported to the combustion air pipeline of the sulfur production reaction furnace, since the sulfur vapor has been fully washed and recovered, the high-temperature sulfur-containing vapor can be prevented from mixing with the normal-temperature combustion air to condense into sulfur solid and block the pipeline and the pump. By filtering the slurry and discharging the filter cake into the sulfur storage device 17 arranged between the liquid sulfur supply pipeline 1 and the liquid sulfur storage and transportation equipment 15, the sulfur filter cake in the sulfur storage device 17 can be transported together with the feed liquid sulfur from the liquid sulfur supply pipeline 1 to the liquid sulfur storage and transportation equipment 15, so that the sulfur resource in the tail gas can be reused on site.

[0118] In step S3, the filter cake in sulfur reservoir 17 is heated to liquefy (sulfur is liquefied when the temperature is higher than 120 DEG C) and then loaded into liquid sulfur storage and transportation device 15 together with incoming liquid sulfur. In this process, the heat required for the heating and liquefying of the filter cake before feeding can be provided by heating facility 14 on sulfur reservoir 17, and the heat of the incoming liquid sulfur can be used to assist in maintaining the temperature during feeding, so as to reduce the continuous heating requirement of sulfur reservoir 17 for heating facility 14, and realize "heat energy synergy".

[0119] In step S1, liquid sulfur supply pipeline 1 and sulfur reservoir 17 preferably deliver high-temperature liquid sulfur into liquid sulfur storage and transportation device 15.

[0120] In step S2, the tail gas generated by the liquid sulfur storage and transportation device is preferably collected at a high temperature.

[0121] It should be noted that "high temperature" in the present application refers to a temperature at which sulfur vapor can be kept in a gaseous state, for example, 130 DEG C to 160 DEG C.

[0122] In the present application, the method can further include washing the tail gas with the filtrate generated after the slurry is filtered, so as to realize the recycling of the washing liquid.

[0123] In the present application, the method can further include buffering the filtrate in intermediate tank 7 before use, that is, the filtrate is first buffered in intermediate tank 7 before being used to wash the tail gas.

[0124] In the present application, the method can further include supplementing fresh washing liquid into intermediate tank 7.

[0125] In the present application, the temperature in intermediate tank 7 is preferably controlled to be 20 DEG C to 60 DEG C, that is, the same temperature as the washing tower. In actual use, a circulating cooling water can be arranged on one of the washing tower and the intermediate tank to control the temperature.

[0126] In the present application, the method can further include purging liquid sulfur supply pipeline 1 and the downstream liquid sulfur delivery pipeline (including sulfur reservoir 17 and liquid sulfur feeding pipeline 13) with inert gas or waste gas generated after the tail gas is washed. Specifically, the residual liquid sulfur in liquid sulfur supply pipeline 1, sulfur reservoir 17 and liquid sulfur feeding pipeline 13 (that is, the connecting pipeline between sulfur reservoir 17 and liquid sulfur storage and transportation device 15) is blown out.

[0127] In the present application, the method can be carried out by using the liquid sulfur storage and transportation tail gas treatment system described in the present application. Of course, the method can also be carried out by using other systems or devices.

[0128] The liquid sulfur storage and transportation tail gas treatment method of the present application will be described in detail below in combination with FIG. 1 and FIG. 2. The method comprises:

[0129] When the liquid sulfur is fed, the temperature of the heat tracing facilities 14 on the liquid sulfur supply pipeline 1, the sulfur storage vessel 17, the liquid sulfur feeding pipeline 13 and the tail gas collection pipeline 2 is controlled at 130-160℃. The liquid sulfur enters the liquid sulfur storage and transportation equipment 15 through the liquid sulfur supply pipeline 1 and the sulfur storage vessel 17, and at the same time, the tail gas of the liquid sulfur storage and transportation equipment 15 enters the washing section A of the washing tower 3 through the tail gas collection pipeline 2 by the suction of the induced draft equipment 9.

[0130] The washing liquid in the intermediate tank 7 is delivered to the washing liquid inlet 302 of the washing tower 3 by the circulating pump 8 and is sprayed downward by the spraying facilities 303. The downward sprayed washing liquid is in countercurrent contact with the upward flowing tail gas for mass transfer and heat transfer. The sulfur vapor in the tail gas is cooled and solidified into sulfur blocks which fall into the crushing section B. The sulfur blocks are ground into fine particles by the rotating crushing balls 308 in the crushing section B. After the particle size is controlled by the filter partition 309, the slurry containing sulfur particles is delivered to the filter by the slurry delivery pump 4. After the slurry enters the filter, the sulfur particles are intercepted by the filter, and the filtrate enters the intermediate tank 7 and is returned to the washing tower 3 by the circulating pump 8 for recycling. The waste gas after washing is pressurized by the induced draft equipment 9 and is sent to the sulfur production reaction furnace through the waste gas discharge pipeline 10 to be mixed with the combustion air for combustion support.

[0131] When the liquid sulfur feeding is finished, the liquid sulfur supply pipeline 1 is purged by nitrogen or waste gas to blow out the residual liquid sulfur adhered in the sulfur storage vessel 17 and the liquid sulfur feeding pipeline 13 to the liquid sulfur storage and transportation equipment 15.

[0132] In the filtering process, the first filter 5 and the second filter 6 are switched. When the first filter 5 is used for filtering the slurry and the pressure difference between the inlet and outlet of the first filter 5 is too large and reaches a preset value, the first filter 5 is stopped and the second filter 6 is switched for filtering operation. The switched first filter 5 discharges the sulfur particle filter cake to the sulfur storage vessel 17 after the feeding is finished. The filter cake in the sulfur storage vessel 17 is delivered to the liquid sulfur storage and transportation equipment 15 together with the feeding liquid sulfur in the next liquid sulfur feeding process.

[0133] The sulfur filter cake intercepted by the filter contains a certain amount of water, and the water content accounts for about 10%-40% of the total mass of the filter cake. The water will evaporate and vaporize when heated during high-temperature liquid sulfur feeding, and is returned to the washing tower together with the tail gas by the suction of the induced draft equipment after entering the liquid sulfur storage and transportation equipment 15 and is cooled and recovered.

[0134] The application can efficiently transfer the sulfur collected by the filter to the liquid sulfur storage and transportation equipment by adopting the mode of "solid collection + rapid liquefaction + power sharing + heat energy cooperation", and the specific process is as follows: the sulfur storage device regularly collects the solid sulfur discharged from the filter, before the feeding operation, the sulfur storage device is heated to higher than 120 DEG C to rapidly liquefy the sulfur particles therein, and then the feeding liquid sulfur power from the liquid sulfur supply pipeline 1 is used to realize the conveying, the additional mechanical power conveying equipment is saved, and the heat of the sulfur storage device can be assisted to maintain during the conveying process, so that the continuous heating requirement of the sulfur storage device is reduced.

[0135] The liquid sulfur storage and transportation tail gas treatment system and method of the application does not generate solid waste during the whole treatment process, and is particularly suitable for the treatment of sulfur-containing waste gas such as liquid sulfur pool degassing, liquid sulfur tank breathing exhaust and liquid sulfur loading escape gas.

[0136] So far, the embodiments of the application have been described in detail. In order to avoid obscuring the concept of the application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0137] Although some specific embodiments of the application have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, and are not intended to limit the scope of the application. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way.

Claims

1. A liquid sulfur storage and transportation off-gas treatment system, characterized in that, The system comprises: a sulfur storage device (17) having a liquid sulfur inlet, a liquid sulfur outlet and a filter cake inlet, the liquid sulfur inlet being communicated with a liquid sulfur supply pipeline (1); a liquid sulfur storage and transportation device (15) having a liquid sulfur inlet and a tail gas outlet, the liquid sulfur inlet of the liquid sulfur storage and transportation device (15) being communicated with the liquid sulfur outlet of the sulfur storage device (17); a washing tower (3) having a washing liquid inlet (302), a tail gas inlet (304) and a slurry outlet (305), the tail gas inlet (304) being communicated with the tail gas outlet of the liquid sulfur storage and transportation device (15), the washing tower (3) being used for washing tail gas introduced from the tail gas inlet (304) with washing liquid introduced from the washing liquid inlet (302) and performing liquid under-pulverization on the washed sulfur lumps to form a slurry containing sulfur particles and then discharging the slurry from the slurry outlet (305); a filter having a slurry inlet and a filter cake outlet, the slurry inlet being communicated with the slurry outlet of the washing tower (3) to make the slurry enter the filter for filtration, and the filter cake outlet being communicated with the filter cake inlet of the sulfur storage device (17) to make the filtered sulfur filter cake enter the sulfur storage device (17).

2. The liquid sulfur storage and transportation tail gas treatment system according to claim 1, wherein: the sulfur storage device (17) is a pipeline sulfur storage device, and / or the filter further has a filtrate outlet, the filtrate outlet being communicated with the washing liquid inlet of the washing tower (3) to make the filtrate enter the washing tower (3) for recycling.

3. The liquid sulfur storage and transfer off-gas treatment system of claim 1, wherein, the liquid sulfur supply pipeline (1) is directly communicated with the liquid sulfur inlet of the sulfur storage device (17), and / or the filter cake inlet is located at the top of the sulfur storage device (17), the filter is located above the sulfur storage device (17), and the filter cake outlet of the filter is located at the bottom of the filter and corresponds to the filter cake inlet.

4. The liquid sulfur storage and transportation tail gas treatment system according to claim 1, wherein: heating facilities (14) are arranged on the liquid sulfur supply pipeline (1), the sulfur storage device (17) and the communication pipeline between the liquid sulfur outlet of the sulfur storage device (17) and the liquid sulfur inlet of the liquid sulfur storage and transportation device (15); and / or heating facilities (14) are arranged on the communication pipeline between the tail gas outlet of the liquid sulfur storage and transportation device (15) and the tail gas inlet of the washing tower (3).

5. The liquid sulfur storage and transfer off-gas treatment system of claim 4, wherein, The heating facilities (14) are electric heating or steam heating, and / or the heating temperature of the heating facilities (14) is 130-160℃.

6. The liquid sulfur storage and transportation tail gas treatment system according to claim 1, wherein: the liquid sulfur storage and transportation tail gas treatment system further comprises an intermediate tank (7) having a filtrate inlet and a washing liquid outlet, the filtrate inlet of the intermediate tank (7) being communicated with the filtrate outlet of the filter, and the washing liquid outlet of the intermediate tank (7) being communicated with the washing liquid inlet of the washing tower (3); and / or A slurry delivery pump (4) is arranged on the communication pipeline between the slurry outlet of the washing tower (3) and the slurry inlet of the filter.

7. The liquid sulfur storage and transportation tail gas treatment system according to claim 6, characterized in that, The intermediate tank (7) further has a supplementary liquid inlet for supplementing washing liquid into the intermediate tank (7); and / or A circulating pump (8) is arranged on the communication pipeline between the washing liquid outlet of the intermediate tank (7) and the washing liquid inlet of the washing tower (3), and the circulating pump (8) is used to deliver the washing liquid in the intermediate tank (7) into the washing tower (3); preferably, a liquid discharge pipeline (16) is arranged on the communication pipeline between the circulating pump (8) and the washing liquid inlet of the washing tower (3).

8. The liquid sulfur storage and transfer off-gas treatment system of claim 1, wherein, The filter has at least one of the following arrangements: Arrangement one, the filter is a centrifugal filter, a plate-and-frame filter or a scraper filter; Arrangement two, the filter precision of the filter is 1-200 μm, preferably 25-150 μm; Arrangement three, the filter temperature of the filter is 20-60 ℃; Arrangement four, the liquid sulfur storage and transportation tail gas treatment system comprises a plurality of filters connected in parallel, and the plurality of filters are arranged to filter in turn; preferably, the filter that is filtering is stopped and switched to the next filter for filtering when the pressure difference between the inlet and outlet of the filter reaches a preset value; more preferably, the stopped filter is arranged to discharge the filter cake to the sulfur storage device after the feeding of the liquid sulfur storage and transportation equipment is completed; more preferably, the preset value is ≥ 50 kPa; more preferably, the preset value is 50-500 kPa.

9. The liquid sulfur storage and transfer off-gas treatment system of claim 1, wherein, The inside of the washing tower (3) comprises a washing section (A) and a crushing section (B) distributed upward and downward, the washing liquid inlet (302) is arranged at the upper part of the washing section (A), the tail gas inlet (304) is arranged at the lower part of the washing section (A), the slurry outlet (305) is arranged at the bottom of the washing tower (3), the crushing section (B) is provided with a stirring assembly, crushing balls (308) and filter partitions (309), the filter partitions (309) are arranged at the upper part of the slurry outlet (305) at intervals, the crushing balls (308) are stacked above the filter partitions (309), and the stirring assembly is arranged to stir the crushing balls (308); Preferably, the washing tower (3) further comprises a waste gas outlet (301), and the waste gas outlet (301) is arranged at the top of the washing tower (3); more preferably, the waste gas outlet (301) is used to communicate with a sulfur production reaction furnace; Preferably, the washing section (A) is provided with a spraying facility (303) communicating with the washing liquid inlet (302). Preferably, the washing tower (3) is externally provided with a motor (310), the stirring assembly comprises a rotating shaft (306) and a plurality of stirring rods (307), the rotating shaft (306) is inserted into the crushing section (B) from the bottom of the washing tower (3) upwards, the bottom end of the rotating shaft (306) is drivingly connected with the motor (310), and a plurality of the stirring rods (307) are arranged on the rotating shaft (306) and located above the filter partition (309) in the axial direction of the rotating shaft (306). Preferably, the washing section (A) and the crushing section (B) are coaxially arranged in an up-down manner.

10. The liquid sulfur storage and transfer off-gas treatment system of claim 9, wherein, The filter partition (309) has a filter hole diameter of 0.5-5 mm, preferably 1-3 mm; and / or The opening area of the filter partition (309) is greater than or equal to the cross-sectional area of the slurry outlet (305), and preferably, the opening area of the filter partition (309) is 2-10 times the cross-sectional area of the slurry outlet.

11. The liquid sulfur storage and transfer off-gas treatment system of any one of claims 1-10, wherein, The liquid sulfur storage and transportation tail gas treatment system further comprises an air induction device (9) which is in communication with the exhaust gas outlet of the washing tower (3), the air induction device (9) is used to provide collection power for tail gas of the liquid sulfur storage and transportation device (15), and the tail gas is introduced into the washing tower (3), and the exhaust gas formed after the tail gas is washed is introduced out of the washing tower (3); and / or The liquid sulfur storage and transportation tail gas treatment system further comprises a purge pipeline which is in communication with the liquid sulfur supply pipeline (1); preferably, the purge pipeline comprises an inert gas purge pipeline (12) and / or an exhaust gas purge pipeline (11), and the exhaust gas purge pipeline (11) is in communication with the exhaust gas outlet of the washing tower (3) and the liquid sulfur supply pipeline (1).

12. A method for treating tail gas from liquid sulfur storage and transportation, characterized in that, The method comprises: S1, a sulfur storage device (17) is arranged between the liquid sulfur supply pipeline (1) and the liquid sulfur storage and transportation device (15), so that the liquid sulfur supplied by the liquid sulfur supply pipeline (1) flows through the sulfur storage device (17) and is loaded into the liquid sulfur storage and transportation device (15); S2, the tail gas generated by the liquid sulfur storage and transportation device (15) is collected and washed, and the washed sulfur block is crushed under liquid to form a slurry containing sulfur particles; S3, the slurry is filtered, and the filter cake is discharged into the sulfur storage device (17), and the filter cake is loaded into the liquid sulfur storage and transportation device (15) together with the incoming liquid sulfur supplied by the liquid sulfur supply pipeline (1).

13. The liquid sulfur storage and transportation tail gas treatment method according to claim 12, wherein In step S3, the filter cake in the sulfur storage device (17) is liquefied after being heated, and is loaded into the liquid sulfur storage and transportation device (15) together with the incoming liquid sulfur; and / or In step S2, the sulfur block is crushed into sulfur particles with a particle size of 0.5-5 mm, preferably 1-3 mm.

14. The liquid sulfur storage and transfer off-gas treatment method of claim 12, wherein, The method comprises washing the tail gas with the filtrate produced after filtering the slurry, preferably, the method comprises buffering the filtrate in an intermediate tank (7) before using, more preferably, the method comprises supplementing fresh washing liquid into the intermediate tank (7); more preferably, the temperature in the intermediate tank (7) is controlled to be 20-60℃; and / or The method comprises purging the liquid sulfur supply pipeline (1) and the liquid sulfur delivery line downstream thereof with inert gas or waste gas produced after washing the tail gas.

15. The liquid sulfur storage and transportation tail gas treatment method according to claim 12, characterized in that, In step S1, the liquid sulfur supply pipeline (1) and the sulfur storage device (17) deliver high-temperature liquid sulfur into the liquid sulfur storage and transportation device (15); and / or In step S2, the tail gas produced by the liquid sulfur storage and transportation device (15) is collected at high temperature.

16. The liquid sulfur storage and transfer off-gas treatment method according to any one of claims 12-15, characterized in that, The method is performed by using the liquid sulfur storage and transportation tail gas treatment system according to any one of claims 1-11.

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