A comprehensive utilization device of sodium salt sulfur paste

Abstract

The application discloses a comprehensive utilization device for sodium salt-containing sulfur paste, which comprises a disc heater, a feeding device, a discharging device, an oxygen content analyzer, a sulfur steam leading-out device, a steam-water separation device and a first cooler. The disc heater comprises a plurality of heating discs and a plurality of cooling discs arranged in sequence along a vertical direction, and the heating discs are all located above the cooling discs. The heating disc is provided with a heating disc pipe communicated with a medium-pressure steam pipeline to pass through medium-pressure steam, and is used for evaporating sulfur in the sodium salt-containing sulfur paste placed thereon to form sulfur steam. The heating disc and the cooling disc are also provided with a scraper plate used for scraping off the sodium salt left thereon. The oxygen content analyzer is connected with the disc heater and is in communication connection with a central control device. The sodium salt-containing sulfur paste can be purified into liquid sulfur or sulfur steam with utilization value, and the sodium salt and the sulfur component are continuously separated through different two phases, so that continuous and efficient production is realized.

Description

Technical Field

[0001] This utility model relates to the field of coking equipment technology, and more specifically, to a comprehensive utilization device for sodium salt sulfur paste. Background Technology

[0002] In the coking industry, the processes for preparing sodium metabisulfite, sulfur, or sulfuric acid from ammonia-based desulfurization paste, represented by HPF desulfurization (a wet oxidation desulfurization process using ammonia from coke oven gas as the alkali source and HPF composite catalyst as the catalytic system), are relatively mature. Among these, the ammonia-based desulfurization paste for sulfuric acid production is the most mature and widely used. However, this technology cannot handle sodium-containing sulfur paste produced by processes such as PDS wet oxidation desulfurization (a wet desulfurization process using sodium carbonate as the alkali source and PDS as the catalyst). The reasons are as follows: sodium salts and sulfur paste are difficult to separate online. If sodium-containing sulfur paste is directly fed into the incinerator to prepare sulfuric acid,... On the one hand, sodium salts cannot be burned because the combustion of sodium salt sulfur paste generates a large amount of ash, which easily clogs the heat exchange tubes of waste heat boilers or the catalyst channels of subsequent SCR reactors. On the other hand, sodium-containing ash, after entering the SO2 converter, will generate crystals such as Na2SO4 or NaHSO4 inside the SO2 conversion catalyst, destroying the catalyst's fixed structure and causing catalyst pulverization, affecting the normal operation of the conversion tower. Finally, after combustion, the process gas contains a large amount of ash, some of which will enter the finished sulfuric acid, affecting the transparency of the sulfuric acid and thus reducing the quality of the sulfuric acid product. Therefore, there is currently no equipment in the technology for the high-quality and effective treatment of sodium salt sulfur paste. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a comprehensive utilization device for sodium salt sulfur paste, which can purify sodium salt sulfur paste, which originally had no utilization value in the coal chemical industry and could not be utilized, into liquid sulfur or sulfur vapor with utilization value. Moreover, it can continuously separate the sodium salt and sulfur components in the sodium salt sulfur paste through different two phases, so as to achieve continuous and efficient production.

[0004] This utility model provides a comprehensive utilization device for sodium salt sulfur paste, comprising:

[0005] A disc heater includes multiple heating discs and multiple cooling discs arranged sequentially in a vertical direction. The heating discs are all located above the cooling discs. Each heating disc has a heating disc tube that is connected to a medium-pressure steam pipe to allow the passage of medium-pressure steam. The heating disc is used to evaporate sulfur in sodium salt-containing sulfur paste placed on it to form sulfur vapor. The heating disc and the cooling disc also have scrapers for scraping off the sodium salt remaining on them.

[0006] A feeding device is located at the top of the disc heater and is used to transport sodium salt sulfur paste to the top heating plate of the disc heater.

[0007] A discharge device is located at the bottom of the disc heater and is used to discharge the scraped sodium salt outside the disc heater.

[0008] An oxygen content analyzer is connected to the disc heater and is communicatively connected to a central control device. The central control device is used to control the feeding speed of the feeding device and the discharging speed of the discharging device according to the oxygen content in the disc heater.

[0009] A sulfur vapor extraction device is connected to the internal space of the disc heater;

[0010] A steam-water separator, connected to the heating coil, is used to separate hot water and steam;

[0011] The first cooler is connected to the cooling coil tubes in the cooling pan and is used to reduce the discharge temperature.

[0012] Preferably, in the above-mentioned comprehensive utilization device for sodium salt sulfur paste, the uppermost heating plate has a gap in the middle, and its scraper is used to scrape the sodium salt down from the gap in the middle.

[0013] The heating plate of the second layer has no gap in the middle, and its scraper is used to scrape sodium salt off its outer periphery;

[0014] The structure of the third layer is the same as that of the first layer, the structure of the fourth layer is the same as that of the second layer, and so on.

[0015] Preferably, in the above-mentioned comprehensive utilization device for sodium-containing sulfur paste, the feeding device includes:

[0016] A feed pipe connected at one end to the disc heater, a first star-shaped feed valve disposed on the feed pipe, a first screw conveyor connected at the second end of the feed pipe, a hopper disposed on the first screw conveyor, and a first belt conveyor with its discharge end located on the hopper, wherein the feed end of the first belt conveyor is located below the sulfur paste discharge hopper.

[0017] Preferably, in the above-mentioned comprehensive utilization device for sodium-containing sulfur paste, the discharge device includes:

[0018] A discharge pipe connected to the bottom of the disc heater at one end, a second star-shaped discharge valve disposed on the discharge pipe, a second screw conveyor connected to the second end of the discharge pipe, and a second belt conveyor located below the discharge port of the second screw conveyor, wherein a hopper is disposed below the end of the second belt conveyor away from the discharge port.

[0019] Preferably, in the above-mentioned comprehensive utilization device for sodium-containing sulfur paste, the sulfur vapor extraction device includes:

[0020] A first sulfur vapor outlet pipe with its first end connected to the internal space of the disc heater, and a first induced draft fan connected to the second end of the first sulfur vapor outlet pipe, wherein the first induced draft fan is used to transport the extracted sulfur vapor to the incinerator for acid production.

[0021] Preferably, in the above-mentioned comprehensive utilization device for sodium salt sulfur paste, the outer periphery of the first sulfur vapor outlet pipe is provided with a first heat tracing jacket and a first heat insulation component, wherein the air inlet of the first heat tracing jacket is connected to the medium-pressure steam pipeline, and the medium-pressure steam pipeline is used to introduce medium-pressure steam into the first heat tracing jacket.

[0022] Preferably, in the above-mentioned comprehensive utilization device for sodium salt sulfur paste, the air outlet of the first heat tracing jacket is connected to the steam-water separation device.

[0023] Preferably, in the above-mentioned comprehensive utilization device for sodium-containing sulfur paste, the sulfur vapor extraction device includes:

[0024] A second sulfur vapor outlet pipe with its first end connected to the internal space of the disc heater, a second cooler with its first end connected to the second end of the second sulfur vapor outlet pipe, a gas-liquid separator and a second induced draft fan connected in sequence to the second end of the second cooler, wherein the gas-liquid separator is used to separate liquid sulfur and waste gas, and the second induced draft fan is used to discharge the waste gas through a chimney.

[0025] Preferably, in the above-mentioned comprehensive utilization device for sodium salt sulfur paste, the outer periphery of the second sulfur vapor outlet pipe is provided with a second heat tracing jacket and a second heat insulation component. The air inlet of the second heat tracing jacket is connected to the third end of the second cooler for recovering medium-pressure steam in the second cooler. The air outlet of the second heat tracing jacket is connected to the medium-pressure steam pipeline. The fourth end of the second cooler is also connected to a low-pressure steam pipeline for inputting low-pressure steam into the second cooler.

[0026] Preferably, in the above-mentioned comprehensive utilization device for sodium salt sulfur paste, the steam-water separation device is a flash evaporator.

[0027] As can be seen from the above technical solution, the comprehensive utilization device for sodium-containing sulfur paste provided by this utility model includes a disc heater comprising multiple heating discs and multiple cooling discs arranged sequentially in a vertical direction. The heating discs are all located above the cooling discs. Each heating disc contains a heating coil tube connected to a medium-pressure steam pipe for the passage of medium-pressure steam. The heating discs are used to evaporate the sulfur in the sodium-containing sulfur paste placed on them to form sulfur vapor, thus separating the sulfur and sodium salt. Furthermore, since the heating discs and cooling discs also have scrapers for scraping off the sodium salt remaining on them, the sodium salt can be moved downwards gradually and independently. The device includes a feeding device located at the top of the disc heater for conveying the sodium-containing sulfur paste to the top heating disc, a discharging device located at the bottom of the disc heater for discharging the scraped sodium salt outside the disc heater, and an oxygen content analyzer connected to the disc heater and communicatively connected to a central control device. The central control device is used to... The oxygen content within the disc heater controls the feeding speed of the feeding device and the discharge speed of the discharging device, thus ensuring that the oxygen content does not exceed a certain range and guaranteeing the safety of the entire device. Furthermore, the inclusion of a sulfur vapor extraction device, connected to the internal space of the disc heater, allows for the separate extraction of pure sulfur, free of sodium salts. The inclusion of a steam-water separator, connected to the heating coil, separates hot water and steam, avoiding the adverse effects of water. The inclusion of a first cooler, connected to the cooling coil within the cooling disc, lowers the discharge temperature, effectively preventing the rapid cooling of high-temperature salts upon contact with air, which would lead to excessive water absorption and accelerated corrosion of the discharge device. Therefore, the aforementioned comprehensive utilization device for sodium-containing sulfur paste can purify sodium-containing sulfur paste, which was previously unusable in the coal chemical industry, into usable liquid sulfur or sulfur vapor. It also allows the sodium salts and sulfur components in the sodium-containing sulfur paste to be continuously separated through two different phases, achieving continuous and efficient production. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 A schematic diagram of an embodiment of a comprehensive utilization device for sodium salt sulfur paste provided by this utility model;

[0030] Figure 2This is a schematic diagram of a preferred embodiment of a device for the comprehensive utilization of sodium salt sulfur paste. Detailed Implementation

[0031] The core of this utility model is to provide a comprehensive utilization device for sodium salt sulfur paste, which can purify sodium salt sulfur paste, which originally had no utilization value in the coal chemical industry and could not be utilized, into liquid sulfur or sulfur vapor with utilization value. It can also continuously separate the sodium salt and sulfur components in the sodium salt sulfur paste through different two phases, realizing continuous and efficient production. It can be used, but is not limited to, processing sulfur paste produced by sodium desulfurization of coke oven gas.

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] An example of an implementation of the comprehensive utilization device for sodium salt sulfur paste provided by this utility model. Figure 1 As shown, Figure 1 This is a schematic diagram of an embodiment of a comprehensive utilization device for sodium salt sulfur paste provided by this utility model. The device may include:

[0034] The disc heater 1, generally not less than 5 meters high, includes a cavity containing multiple heating discs 11 and multiple cooling discs 12 arranged vertically. The heating discs 11 are all located above the cooling discs 12. In this embodiment, a total of 12 heating discs 11 and 8 cooling discs 12 are used. Figure 1As can be seen, the uppermost heating plate 11 has a gap in the middle, and its scraper is used to scrape sodium salt down through this gap. The second heating plate 11 has no gap in the middle, and its scraper is used to scrape sodium salt down from its outer periphery. The third layer has the same structure as the first layer, and the fourth layer has the same structure as the second layer, and so on. The scrapers on the cooling plate can also be arranged similarly. By scraping in both directions alternately, the material can be continuously and thoroughly turned over, increasing the evaporation area of ​​sulfur. Of course, other numbers of heating plates and other arrangements of heating plates can be set according to actual needs. There are no restrictions here. The heating plate 11 is equipped with a medium pressure... Steam pipe 2 connects to a heating coil (not shown as it is internal) containing medium-pressure steam. This medium-pressure steam has a pressure of 3.5 MPa and a corresponding temperature of 450°C, which is higher than the boiling point of sulfur (444.6°C). The medium-pressure steam provides a heat source for the heating coil 11, which evaporates the sulfur in the sodium salt-containing sulfur paste placed on it to form sulfur vapor. This separates the sulfur and sodium salt in the sodium salt-containing sulfur paste. Furthermore, both the heating coil 11 and the cooling coil 12 have scrapers 3 for scraping off any remaining sodium salt. It should be noted that each heating coil 11 and cooling coil 12 has a corresponding scraper 3. Figure 1 The diagram shows two scrapers 3. In reality, all the scrapers with the same shape below are scrapers 3. The uppermost scraper 3 can scrape the sodium salt remaining on the heating plate 11 towards the gap in the middle, and then let it fall down to the larger heating plate 11 below. After further heating to remove sulfur, the remaining sodium salt is scraped to both sides through the gaps on both sides. This process continues until the sulfur in the sodium salt is continuously vaporized into sulfur vapor to separate the sulfur from the sodium salt. The sulfur vapor can then be sent to the cooler to prepare liquid sulfur or directly sent to the incinerator in the form of sulfur vapor via an induced draft fan to prepare sulfuric acid. In the end, the sodium salt just falls to the bottom and is scraped out by the scraper and discharged to the waste salt hopper for further preparation of alkali solution or solid waste treatment.

[0035] The feeding device 4 is located at the top of the disc heater 1 and is used to transport sodium salt sulfur paste to the top heating plate 11 of the disc heater 1. Specifically, it can take out sodium salt sulfur paste from the sulfur paste discharge hopper and transport the sodium salt sulfur paste to the heating plate 11 for related subsequent operations.

[0036] The discharge device 5 is located at the bottom of the disc heater 1 and is used to output the scraped sodium salt outside the disc heater 1. It can be seen that the sulfur is separated out and only the sodium salt is output for subsequent application.

[0037] The oxygen content analyzer 6 is connected to the disc heater 1 and is also connected to the central control device 7. The central control device 7 is used to control the feeding speed of the feeding device 4 and the discharging speed of the discharging device 5 according to the oxygen content in the disc heater 1. It should be noted that since the ignition point of sulfur is 260-290℃, the oxygen content in the disc heater 1 needs to be strictly controlled to ≤2%. Therefore, the feeding speed and discharging speed need to be strictly controlled to prevent air from mixing in. The oxygen content analyzer 6, the feeding device 4 and the discharging device 5 can be connected to the central control device 7 by wireless communication, but not limited to, to avoid too many lines.

[0038] The sulfur vapor extraction device 8 is connected to the internal space of the disc heater 1. After the cooled liquid sulfur passes through this sulfur vapor extraction device 8, the gas can be discharged from the top by being drawn by the induced draft fan.

[0039] The steam-water separator 9 is connected to the heating coil and is used to separate hot water and steam. Its function is to drain the steam after passing through the disc heater 1, that is, to separate hot water and steam to prevent water hammer and damage to the pipeline.

[0040] The first cooler 10 is connected to the cooling coil tube in the cooling plate 12 and is used to reduce the discharge temperature. Specifically, the first cooler 10 can introduce a cooling medium, such as circulating cooling water, into the cooling plate 12 to cool the sodium salt on the cooling plate 12. If the discharge is not cooled, it will absorb a large amount of water after rapid cooling when the high-temperature salt comes into contact with air, which will lead to increased corrosion of the discharge device 5.

[0041] It should also be noted that, in this embodiment, to control the material to evaporate as much as possible in the middle of the disc heater 1, the uppermost heating disc should have more scrapers. Increasing the number of scrapers as needed will accelerate the material's movement from one layer to the next, and the number should gradually decrease until the total number of scrapers remains constant. This achieves the effect of preheating in the upper section of the steam section, evaporating in the middle section, and cooling in the lower section. During the heat balance calculation of the heating disc, calculations should be performed to ensure that all sulfur paste is completely evaporated in the lower 3-5 layers of the steam section, preventing dilute sulfur from flowing into the lower water cooling section and causing "lower dilute sulfur". To prevent the material from softening during heating and flowing directly into the gap between the heating plate and the outer shell, the following measures should be taken: For materials fed from the center of the heating plate, an outer edge of a certain height should be provided at the edge. This outer edge can be located at the edge of the 2nd to 4th large plates from the top. This prevents the material from flowing directly into the gap between the heating plate and the outer shell after softening during heating. The height should be controlled between 5mm and 10mm, and the specific height can be comprehensively measured based on the feeding speed and processing volume. No notch is needed; the material will automatically enter the lower small plate from the central hole of the large plate for further heating, without affecting the small plate. Ultimately, this prevents the sulfur paste material from softening during heating and vaporization and flowing from the edge into the lower part of the heater. The aforementioned disc heater can vaporize the sulfur components in the sulfur paste and scrape the sodium salt into the bottom scraper section during the layer-by-layer heating process, and then discharge it through the bottom.

[0042] As can be seen from the above technical solution, in the embodiment of the comprehensive utilization device for sodium-containing sulfur paste provided by this utility model, a disc heater is included, comprising multiple heating discs and multiple cooling discs arranged sequentially in a vertical direction. The heating discs are all located above the cooling discs. Heating disc tubes connected to medium-pressure steam pipes are provided inside the heating discs to allow the passage of medium-pressure steam. The heating discs are used to evaporate the sulfur in the sodium-containing sulfur paste placed on them to form sulfur vapor, thus separating the sulfur and sodium salt. Furthermore, since the heating discs and cooling discs also have scrapers for scraping off the sodium salt remaining on them, the sodium salt can be moved downwards gradually and independently. A feeding device is included, located at the top of the disc heater, for conveying the sodium-containing sulfur paste to the topmost heating disc of the disc heater. A discharging device is located at the bottom of the disc heater for outputting the scraped sodium salt outside the disc heater. An oxygen content analyzer is connected to the disc heater and communicatively connected to a central control device. The central control device is used to analyze the content of the sodium salt in the disc heater. The oxygen content control system regulates the feeding speed of the feeding device and the discharge speed of the discharging device, ensuring that the oxygen content does not exceed a certain range and guaranteeing the safety of the entire device. Furthermore, the inclusion of a sulfur vapor extraction device, connected to the internal space of the disc heater, allows for the separate extraction of pure sulfur, free of sodium salts. The inclusion of a steam-water separator, connected to the heating coil, separates hot water and steam, thus avoiding the adverse effects of water. The inclusion of a first cooler, connected to the cooling coil within the cooling pan, lowers the discharge temperature, effectively preventing the rapid cooling of high-temperature salts upon contact with air, which would lead to excessive water absorption and accelerated corrosion of the discharge device. Therefore, the aforementioned comprehensive utilization device for sodium-containing sulfur paste can purify sodium-containing sulfur paste, which was previously unusable in the coal chemical industry, into usable liquid sulfur or sulfur vapor. It also allows for the continuous separation of sodium salts and sulfur components from the sodium-containing sulfur paste through two different phases, achieving continuous and efficient production.

[0043] Continue to refer to Figure 1 In a specific embodiment of the above-mentioned comprehensive utilization device for sodium salt sulfur paste, the feeding device 4 may include:

[0044] The feed pipe 41 is connected to the disc heater 1 at one end, the first star-shaped feed valve 42 is installed on the feed pipe 41, the first screw conveyor 43 is connected to the second end of the feed pipe 41, the hopper 44 is installed on the first screw conveyor 43, and the discharge end is located on the hopper 44 of the first belt conveyor 45, wherein the feed end of the first belt conveyor 45 is located below the sulfur paste discharge hopper 46. In this situation, after the sulfur paste from the sulfur paste discharge hopper 46 falls onto the first belt conveyor 45, it can be driven forward and fall from its discharge end into the hopper 44, and then into the first screw conveyor 43. When the first star-shaped feed valve 42 is opened, the first screw conveyor 43 can be driven by the motor to continuously feed the sulfur paste into the disc heater 1. This first star-shaped feed valve 42 can be controlled by the central control device 7 to open or close in a timely manner to avoid introducing air into the disc heater 1, and to prevent the sulfur vapor in the disc heater cavity from reaching the explosion limit due to excessive air entering. Specifically, it is closed when there is less sulfur paste and opened when there is more sulfur paste, so that air will not be mixed into the sulfur paste and enter the disc heater 1. In actual operation, the material level in the hopper 44 containing sulfur paste needs to be maintained at ≥1m (while also being less than the maximum height of the hopper); the conveying capacity of the first screw conveyor 43 should be slightly larger than the unloading capacity of the first star-shaped discharge valve 42 to ensure that the amount of air entering the material at the feed end is as small as possible; the sulfur paste entering the sulfur paste discharge hopper 46 needs to be crushed in advance, and the particle size of the sulfur paste should be ≤9mm to ensure sufficient sealing.

[0045] Continue to refer to Figure 1 In another specific embodiment of the above-mentioned comprehensive utilization device for sodium salt sulfur paste, the above-mentioned discharge device 5 may include:

[0046] The system includes a discharge pipe 51 connected to the bottom of the disc heater 1, a second star-shaped discharge valve 52 mounted on the discharge pipe 51, a second screw conveyor 53 connected to the second end of the discharge pipe 51, and a second belt conveyor 54 located below the discharge port of the second screw conveyor 53. The second belt conveyor 54 may have a closed casing, and a hopper 55 is located below the end of the second belt conveyor 54 furthest from the discharge port. In this case, the discharge speed can be controlled by the second screw conveyor 53. This discharge speed cannot be too fast, otherwise air may be introduced into the disc heater 1. By coordinating the discharge speed and the feed speed, air can be more effectively prevented from entering. After entering the hopper 55, the compound salt can be sent to the alkali melting or salt extraction process. In specific operation, the discharge port at the bottom should maintain a certain material level, and the material height at the bottom should be ≥20cm (an observation window can be added on the side for observation). The material height is controlled by the rotation speed of the second star-shaped discharge valve 52 at the bottom. In addition, all associated flanges and equipment of the disc heater 1 must be effectively sealed and pressure-tested for leaks before commissioning. Regarding pressure control, a variable frequency fan should be used, linked to the remote pressure data transmission within the disc heater 1. This allows the fan to automatically adjust its frequency according to the pressure within the disc evaporator 1, maintaining a consistently stable pressure within the disc heater 1 at a slightly negative level (0-0.05 kPa). This prevents sulfur paste particles from being drawn into sulfur vapor and also prevents excessive oxygen content within the disc heater 1. Regarding interlocking control, if the oxygen content within the disc heater 1 is normal, it should be maintained at ≤2%. If the oxygen content is between 2% and 4%, an alarm should be triggered, and the feeding and discharging rates at the inlet and outlet should be controlled to reduce the oxygen content within the evaporator. If the oxygen content exceeds 4%, a trip procedure should be triggered, the system should trip, the disc heater 1 should stop feeding and discharging, the fan should stop, and the fan inlet shut-off valve should close.

[0047] Continue to refer to Figure 1 In another specific embodiment of the above-mentioned comprehensive utilization device for sodium salt sulfur paste, the sulfur vapor extraction device 8 may specifically include:

[0048] A first sulfur vapor outlet pipe 81, connected at one end to the internal space of the disc heater 1, and a first induced draft fan 82, connected at the other end of the first sulfur vapor outlet pipe 81, are also connected. The first sulfur vapor outlet pipe 81 can be equipped with a regulating valve to adjust the pressure inside the disc heater, preventing excessively low internal negative pressure that could lead to a large amount of steam entering the disc heater from both ends and causing excessive oxygen levels inside. The first sulfur vapor outlet pipe 81 can also be equipped with a quick-cut valve for rapid shut-off in emergencies. The disc heater 1 can also be equipped with a pressure relief valve to prevent excessively high internal pressure (such as in the event of a container explosion). The pressure can be automatically released before a danger occurs, preventing a container explosion. The first induced draft fan 82 is used to transport the extracted sulfur vapor to the incinerator for acid production. In this case, the negative pressure generated by the first induced draft fan 82 can extract the sulfur vapor, thereby achieving separation from sodium-containing salts. The obtained sulfur vapor can then be used for appropriate purposes. This sulfur vapor outlet device 8 includes several types of valves, which will not be described in detail here. Further reference is provided below. Figure 1 The outer periphery of the first sulfur vapor outlet pipe 81 may preferably be provided with a first heat tracing jacket 83 and a first heat insulation component. Figure 1 (Not shown), wherein the air inlet of the first heat tracing jacket 83 is connected to the aforementioned medium-pressure steam pipe 2. The medium-pressure steam pipe 2 is used to introduce medium-pressure steam into the first heat tracing jacket 83, so that the first heat tracing jacket 83 can heat the sulfur vapor passing through the first sulfur vapor outlet pipe 81 to prevent it from condensing and clogging the pipe. In addition, more insulation measures can be provided, such as sufficient insulation measures for the outer surface of the disc heater 1, steam pipes, drain pipes, induced draft fans, liquid sulfur conveying pipes, etc. Further details can be found in the reference section. Figure 1 The outlet of the first heat tracing jacket 83 is connected to the steam-water separator 9, thus forming a passage that allows the moisture in the medium-pressure steam passing through it to be separated out.

[0049] It should be noted that the sulfur vapor preparation process can be carried out using this embodiment. If an incinerator with WSA acid production or other incineration acid production processes is installed, the generated sulfur vapor can be directly sent into the incinerator for incineration to produce sulfuric acid. An emergency shut-off valve needs to be installed before the sulfur vapor enters the incinerator, and it should be interlocked with the emergency shutdown device of the acid production unit. When the acid production unit stops, the shut-off valve should also be shut off in an emergency to prevent secondary accidents. This device should also be equipped with an emergency shutdown device so that it can be shut down in an emergency when the equipment fails.

[0050] refer to Figure 2 , Figure 2 This is a schematic diagram of a preferred embodiment of a device for the comprehensive utilization of sodium salt sulfur paste. This preferred embodiment is based on the specific embodiments described above, and most of its components are the same as those in the aforementioned embodiments. Figure 2 Without further annotation or elaboration, only the different parts are described here. The sulfur vapor extraction device 8 may include:

[0051] A second sulfur vapor outlet pipe 84, whose first end is connected to the internal space of the disc heater 1, a second cooler 85, whose first end is connected to the second end of the second sulfur vapor outlet pipe 84, a gas-liquid separator 86, and a second induced draft fan 87, which are sequentially connected to the second end of the second cooler 85, wherein the gas-liquid separator 86 is used to separate liquid sulfur and waste gas, and the second induced draft fan 87 is used to discharge the waste gas through the chimney 88. Further, the outer periphery of the second sulfur vapor outlet pipe 84 may be provided with a second heat tracing jacket 89 and a second heat insulation component (not shown), wherein the air inlet of the second heat tracing jacket 89 is connected to the third end of the second cooler 85 for recovering medium-pressure steam in the second cooler 85, the air outlet of the second heat tracing jacket 89 is connected to the medium-pressure steam pipe 2, and the fourth end of the second cooler 85 is also connected to the low-pressure steam pipe 810 for inputting low-pressure steam into the second cooler 85. It should be noted that a second cooler 85, namely a sulfur vapor low-pressure steam cooler, is used here. After gaseous sulfur absorbs heat with low-pressure steam, it can be transformed into superheated steam with a higher temperature. This steam returns to the medium-pressure steam pipeline 2 after passing through the pipes in the second heat tracing jacket 89, thereby reducing the amount of medium-pressure steam used in the entire device and maximizing the utilization rate of waste heat to achieve a higher energy-saving effect. Moreover, after the cooled liquid sulfur passes through the gas-liquid separator 86, the gas is discharged from the top by being drawn by the second induced draft fan 87, while the liquid sulfur is discharged from the bottom of the gas-liquid separator 86.

[0052] It should also be noted that this embodiment is used to prepare liquid sulfur, which can be purified later. In the process of producing liquid sulfur from sulfur paste, in order to ensure the normal transportation of liquid sulfur through the pipeline, the temperature inside the pipeline needs to be ≥130℃, and the gas-liquid separator should be fully insulated to ensure that the temperature at the end liquid sulfur discharge port is ≥125℃. An emergency shutdown device should also be set up so that emergency production can be stopped when the equipment fails and needs to be stopped.

[0053] In various embodiments of the above-mentioned comprehensive utilization device for sodium salt sulfur paste, the vapor-water separation device 9 is preferably a flash tank. This flash tank can instantly vaporize (flash evaporate) the light components (such as steam and volatile substances) in the high-temperature and high-pressure liquid by reducing the pressure, and separate them from the heavy components (liquid or solid). This prevents downstream equipment from being damaged by the sudden vaporization of high-pressure liquid (such as water hammer). It has the advantages of high efficiency and energy saving, simple structure, strong adaptability and fast response. Of course, other types of vapor-water separation devices can also be selected according to actual needs, which is not limited here.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A comprehensive utilization device of sodium salt sulfur paste, characterized in that, include: A disc heater includes multiple heating discs and multiple cooling discs arranged sequentially in a vertical direction. The heating discs are all located above the cooling discs. Each heating disc has a heating disc tube that is connected to a medium-pressure steam pipe to allow the passage of medium-pressure steam. The heating disc is used to evaporate sulfur in sodium salt-containing sulfur paste placed on it to form sulfur vapor. The heating disc and the cooling disc also have scrapers for scraping off the sodium salt remaining on them. A feeding device is located at the top of the disc heater and is used to transport sodium salt sulfur paste to the top heating plate of the disc heater. A discharge device is located at the bottom of the disc heater and is used to discharge the scraped sodium salt outside the disc heater. An oxygen content analyzer is connected to the disc heater and is communicatively connected to a central control device. The central control device is used to control the feeding speed of the feeding device and the discharging speed of the discharging device according to the oxygen content in the disc heater. A sulfur vapor extraction device is connected to the internal space of the disc heater; A steam-water separator, connected to the heating coil, is used to separate hot water and steam; The first cooler is connected to the cooling coil tubes in the cooling pan and is used to reduce the discharge temperature.

2. The comprehensive utilization device for sodium-containing sulfur paste according to claim 1, characterized in that, The uppermost heating plate has a slit in the middle, and its scraper is used to scrape the sodium salt down from the slit in the middle. The heating plate of the second layer has no gap in the middle, and its scraper is used to scrape sodium salt off its outer periphery; The structure of the third layer is the same as that of the first layer, the structure of the fourth layer is the same as that of the second layer, and so on.

3. The comprehensive utilization device for sodium-containing sulfur paste according to claim 1, characterized in that, The feeding device includes: A feed pipe connected at one end to the disc heater, a first star-shaped feed valve disposed on the feed pipe, a first screw conveyor connected at the second end of the feed pipe, a hopper disposed on the first screw conveyor, and a first belt conveyor with its discharge end located on the hopper, wherein the feed end of the first belt conveyor is located below the sulfur paste discharge hopper.

4. The comprehensive utilization device for sodium-containing sulfur paste according to claim 1, characterized in that, The discharge device includes: A discharge pipe connected to the bottom of the disc heater at one end, a second star-shaped discharge valve disposed on the discharge pipe, a second screw conveyor connected to the second end of the discharge pipe, and a second belt conveyor located below the discharge port of the second screw conveyor, wherein a hopper is disposed below the end of the second belt conveyor away from the discharge port.

5. The comprehensive utilization device for sodium-containing sulfur paste according to claim 1, characterized in that, The sulfur vapor extraction device includes: A first sulfur vapor outlet pipe with its first end connected to the internal space of the disc heater, and a first induced draft fan connected to the second end of the first sulfur vapor outlet pipe, wherein the first induced draft fan is used to transport the extracted sulfur vapor to the incinerator for acid production.

6. The comprehensive utilization device for sodium-containing sulfur paste according to claim 5, characterized in that, The outer periphery of the first sulfur vapor outlet pipe is provided with a first heat tracing jacket and a first heat insulation component, wherein the air inlet of the first heat tracing jacket is connected to the medium-pressure steam pipeline, and the medium-pressure steam pipeline is used to introduce medium-pressure steam into the first heat tracing jacket.

7. The comprehensive utilization device for sodium-containing sulfur paste according to claim 6, characterized in that, The outlet of the first heat tracing jacket is connected to the steam-water separator.

8. The comprehensive utilization device for sodium-containing sulfur paste according to claim 1, characterized in that, The sulfur vapor extraction device includes: A second sulfur vapor outlet pipe with its first end connected to the internal space of the disc heater, a second cooler with its first end connected to the second end of the second sulfur vapor outlet pipe, a gas-liquid separator and a second induced draft fan connected in sequence to the second end of the second cooler, wherein the gas-liquid separator is used to separate liquid sulfur and waste gas, and the second induced draft fan is used to discharge the waste gas through a chimney.

9. The comprehensive utilization device for sodium-containing sulfur paste according to claim 8, characterized in that, The outer periphery of the second sulfur vapor outlet pipe is provided with a second heat tracing jacket and a second heat insulation component. The air inlet of the second heat tracing jacket is connected to the third end of the second cooler for recovering medium-pressure steam in the second cooler. The air outlet of the second heat tracing jacket is connected to the medium-pressure steam pipeline. The fourth end of the second cooler is also connected to a low-pressure steam pipeline for inputting low-pressure steam into the second cooler.

10. The comprehensive utilization device for sodium-containing sulfur paste according to any one of claims 1-9, characterized in that, The vapor-water separation device is a flash evaporator.

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