A system and method for comprehensive energy utilization of thionyl chloride distillation tower

Abstract

The present invention discloses a thionyl chloride distillation tower energy comprehensive utilization system, comprising a heat exchanger, a weight removal tower, a crude product tank, and a storage tank, wherein the heat exchanger, the weight removal tower, the crude product tank, and the storage tank are connected by a chemical pipeline, the heat exchanger is provided with a drive motor for rotating the output, the heat exchanger is provided with a baffle, the heat exchanger is provided with an inner flow pipe for circulating sulfur monochloride, and the heat exchanger is provided with a cleaning mechanism for cleaning crystals on the surface of the inner flow pipe. The present invention overcomes the shortcomings of the prior art, has a reasonable design, a compact structure, optimizes the recycling of energy, reduces production costs, and greatly improves production efficiency. The entire production process achieves optimization of reaction efficiency and material utilization, significantly increases the economic benefits of the enterprise, and has high social use value and application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of thionyl chloride distillation, and in particular to a system and method for comprehensively utilizing energy of a thionyl chloride distillation tower. Background Art

[0002] Sulfur oxide chloride is an important fine chemical raw material. There are four production technologies for thionyl chloride: the chlorosulfonic acid method, the co-production method, the sulfur trioxide method, and the sulfur dioxide gas phase method. Currently, the distillation of thionyl chloride adopts a continuous distillation process, in which the deweighting tower mainly separates sulfur monochloride, sulfur dichloride, and thionyl chloride. The bottom temperature of the tower is 125-135°C. After extraction, the sulfur enters the sulfur monochloride storage tank and is cooled by circulating water, resulting in energy waste.

[0003] The temperature of thionyl chloride entering the deweight removal tower is about 50°C. A heat exchanger is needed to increase the temperature at the bottom of the deweight removal tower, which consumes a large amount of steam and increases the input of heating energy.

[0004] Moreover, after long-term use of the heat exchanger, a certain amount of crystals and impurities will adhere to the outer wall of the heat exchange tube. Excessive accumulation of impurities and crystals will affect the temperature transfer of the heat exchange tube, reducing the temperature exchange efficiency between sulfur monochloride and thionyl chloride, affecting the recycling of its energy. The baffles in the heat exchanger cannot be removed, resulting in the general cleaning method not being able to clean the outer wall of the heat exchange tube properly.

[0005] Therefore, in view of this, the inventors, based on their rich experience in design, development and actual production in the relevant industry for many years, have conducted research and improvements on the existing structure and deficiencies, and provided a comprehensive energy utilization system and method for a thionyl chloride distillation tower, which can exchange and recycle energy, avoid the phenomenon of reduced heat exchange effect caused by long-term use, and achieve a more practical purpose. Summary of the Invention

[0006] In order to solve the problems mentioned in the above background technology, the present invention provides a system and method for comprehensive energy utilization of a thionyl chloride distillation tower.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A thionyl chloride distillation tower energy comprehensive utilization system comprises a heat exchanger, a deweighting tower, a crude product tank and a storage tank, wherein the heat exchanger, the deweighting tower, the crude product tank and the storage tank are connected by a chemical pipeline, the heat exchanger is provided with a drive motor for rotating output, the heat exchanger is provided with a baffle, the heat exchanger is provided with an inner flow pipe for circulating sulfur monochloride, and the heat exchanger is provided with a cleaning mechanism for cleaning crystals on the surface of the inner flow pipe.

[0009] Preferably, the cleaning mechanism includes a first scraping mechanism located in the middle of the inner cavity of the heat exchanger, a second scraping mechanism located in the upper part of the inner cavity of the heat exchanger, and a third scraping mechanism located in the lower part of the inner cavity of the heat exchanger. The first scraping mechanism is provided with a mounting frame, the cleaning mechanism is provided with a screw mechanism for driving its translation, and the cleaning mechanism is provided with a guide mechanism for guiding.

[0010] Preferably, the guide mechanism includes a first guide rod for guiding the translation of the first scraping mechanism, a second guide rod for guiding the translation of the second scraping mechanism, and a third guide rod for guiding the translation of the third scraping mechanism.

[0011] Preferably, the screw mechanism includes a first screw for driving the first scraping mechanism to translate, a second screw for driving the second scraping mechanism to translate, and a third screw for driving the third scraping mechanism to translate.

[0012] Preferably, the first scraping mechanism includes a first slider sleeved with the first screw rod, the first slider is provided with a vertically extending connecting frame, the connecting frame is provided with a balancing frame, the balancing frame is provided with a first guide hole for sleeved with the first guide rod, and the balancing frame is provided with a mounting hole for sleeved with the mounting frame.

[0013] Preferably, the second scraping mechanism includes a second slider sleeved with the second screw rod, the second slider is provided with an upper scraper for scraping crystals on the surface of the inner flow tube, the upper scraper is provided with a second guide hole for sleeved with the second guide rod, and the end of the upper scraper is provided with a second scraper for scraping crystals on the surface of the inner flow tube;

[0014] The third scraping mechanism includes a third slider sleeved with the third screw rod, the third slider is provided with a lower scraper for scraping crystals on the surface of the inner flow tube, the lower scraper is provided with a third guide hole for sleeved with a third guide rod, and the end of the lower scraper is provided with a third scraper for scraping crystals on the surface of the inner flow tube;

[0015] The installation orientation of the first scraping mechanism and the installation orientation of the second scraping mechanism are mirror images.

[0016] Preferably, a detachable and cleanable first scraper is provided in the mounting frame, an embedded groove for mounting the first scraper is provided in the mounting frame, and bristles for scraping off crystals on the surface of the inner flow tube are provided on the first scraper.

[0017] Preferably, the heat exchanger is provided with a first feed end for discharging the crude product, and the heat exchanger is provided with a second feed end for introducing the crude product. The first feed end is provided with a gear set connected to the output shaft of the drive motor, and the first feed end is provided with a transmission mechanism connected to the screw mechanism.

[0018] Preferably, the transmission mechanism includes a first transmission rod connected to the first screw rod, a second transmission rod connected to the second screw rod, and a third transmission rod connected to the third screw rod;

[0019] The gear set includes a splicing box located in the first feed end, an upper driven gear connected to the second transmission rod is provided in the splicing box, a lower driven gear connected to the third transmission rod is provided in the splicing box, a driving gear connected to the first transmission rod and the output shaft of the drive motor respectively is provided in the splicing box, and a transmission gear for meshing and splicing the driving gear, the upper driven gear and the lower driven gear is provided in the splicing box.

[0020] A method for comprehensive energy utilization of a thionyl chloride distillation tower comprises the following steps:

[0021] S1: Through pipelines, the high-temperature sulfur monochloride discharged from the bottom of the deweighting tower is introduced into the tube side of the heat exchanger, and the low-temperature crude thionyl chloride discharged from the crude product tank is introduced into the shell side of the heat exchanger to allow heat exchange between the two.

[0022] S2: Low-temperature crude thionyl chloride is introduced into the shell side of the heat exchanger. After heat exchange inside the heat exchanger, the crude thionyl chloride is introduced into the deweighting tower again. The temperature of the crude thionyl chloride before heat exchange is 50-60°C, and the temperature of the crude thionyl chloride after heat exchange is 80-90°C.

[0023] S3: The high-temperature sulfur monochloride introduced into the pipes of the heat exchanger undergoes heat exchange treatment inside the heat exchanger and is then introduced into the storage tank through the chemical pipeline for storage. The temperature of the sulfur monochloride before heat exchange is 125-135°C and after heat exchange is 80-100°C.

[0024] S4: Measure the temperature of crude thionyl chloride and sulfur monochloride before and after heat exchange using a thermometer.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Through the setting of the cleaning mechanism, the mutual cooperation among the driving motor, gear set, transmission mechanism, screw mechanism and guide mechanism can enable the cleaning mechanism to scrape off the attached crystals and impurities on the outer surface of the inner flow tube, so as to avoid the temperature transfer between the shell side and the tube side being affected by excessive attachments on the outer wall of the inner flow tube.

[0027] 2. Through the setting of the heat exchanger, the material transfer between the shell side and the tube side is utilized, and the temperature exchange is carried out according to the temperature difference between sulfur monochloride and thionyl chloride, thereby reducing energy loss.

[0028] 3. Through the heat exchange operation of the heat exchanger, the initial temperature of thionyl chloride entering the de-weighting tower can be increased, reducing the steam consumption of the de-weighting tower. The temperature of sulfur monochloride after heat exchange is lowered, and the interior of the storage tank does not need to be cooled by circulating water, which reduces consumption while solving safety hazards.

[0029] In summary, the present invention overcomes the shortcomings of the existing technology, optimizes the recycling of energy, reduces production costs, greatly improves production efficiency, optimizes the reaction efficiency and material utilization rate of the entire production process, significantly increases the economic benefits of the enterprise, and has high social use value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 is a process flow chart of the present invention;

[0032] Figure 2 Schematic diagram of the tube structure of the heat exchanger in the present invention;

[0033] Figure 3 Schematic diagram of the internal structure of the heat exchanger in the present invention;

[0034] Figure 4 Schematic diagram of the shell side structure of the heat exchanger in the present invention;

[0035] Figure 5 Based Figure 4 A front view of the structure;

[0036] Figure 6 Schematic diagram of the structure of the baffle in the present invention;

[0037] Figure 7 Based Figure 3 A magnified view of the local structure at point A;

[0038] Figure 8 A schematic diagram of the structural connection between the first scraping mechanism and the mounting frame of the present invention;

[0039] Figure 9 A schematic structural diagram of the first scraping mechanism of the present invention;

[0040] Figure 10 A schematic diagram of the structural connection between the mounting frame and the first scraper in the present invention;

[0041] Figure 11 A schematic diagram of the structure of the mounting frame of the present invention;

[0042] Figure 12 A schematic structural diagram of the first scraper of the present invention;

[0043] Figure 13 A schematic structural diagram of the second scraping mechanism of the present invention;

[0044] Figure 14 It is a structural schematic diagram of the third scraping mechanism in the present invention.

[0045] In the figure: 1. heat exchanger; 101. first feed end; 102. second feed end; 103. drive motor; 104. baffle; 105. inner flow pipe; 2. deweighting tower; 3. crude product tank; 4. storage tank; 5. guide mechanism; 501. first guide rod; 502. second guide rod; 503. third guide rod; 6. cleaning mechanism; 61. mounting frame; 62. embedded groove; 63. first scraper; 631. brush; 601. first scraping mechanism; 6011. first slider; 6012. connecting frame; 6013. balancing frame; 6014. first guide hole; 6015. mounting hole; 602. second scraping mechanism ;6021, second slider;6022, upper scraper;6023, second guide hole;6024, second scraper;603, third scraping mechanism;6031, third slider;6032, lower scraper;6033, third guide hole;6034, third scraper;7, screw mechanism;701, first screw;702, second screw;703, third screw;8, gear set;801, splicing box;802, transmission gear;803, driving gear;804, upper driven gear;805, lower driven gear;9, transmission mechanism;901, first transmission rod;902, second transmission rod;903, third transmission rod. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0047] Example 1

[0048] Reference Figure 1-14A comprehensive energy utilization system for a thionyl chloride distillation tower includes a heat exchanger 1, a deweighting tower 2, a crude product tank 3, and a storage tank 4. The heat exchanger 1, the deweighting tower 2, the crude product tank 3, and the storage tank 4 are connected by a chemical pipeline. The heat exchanger 1 is provided with a drive motor 103 for rotation output, a baffle 104 is provided inside the heat exchanger 1, an inner flow pipe 105 for circulating sulfur monochloride is provided inside the heat exchanger 1, and a cleaning mechanism 6 for cleaning crystals on the surface of the inner flow pipe 105 is provided inside the heat exchanger 1.

[0049] Specifically, the cleaning mechanism 6 includes a first scraping mechanism 601 located in the middle of the inner cavity of the heat exchanger 1, a second scraping mechanism 602 located in the upper part of the inner cavity of the heat exchanger 1, and a third scraping mechanism 603 in the lower part of the inner cavity of the heat exchanger 1. The first scraping mechanism 601 is provided with a mounting frame 61, the cleaning mechanism 6 is provided with a screw mechanism 7 for driving its translation, and the cleaning mechanism 6 is provided with a guide mechanism 5 for guiding. After long-term use, the inner flow tube 105 inside the heat exchanger 1 will produce impurities and crystals attached, which directly affects the temperature conversion efficiency of sulfur monochloride flowing inside the inner flow tube 105 to thionyl chloride flowing inside the shell side. The internal components of the cleaning mechanism 6 perform a reciprocating translation left and right on the outer wall of the inner flow tube 105, which can effectively scrape the outer wall of the inner flow tube 105, allowing the attached crystals and impurities to fall off, thereby avoiding excessive accumulation of attachments that affect the temperature transfer and exchange.

[0050] Specifically, the guide mechanism 5 includes a first guide rod 501 for guiding the translation of the first scraping mechanism 601, a second guide rod 502 for guiding the translation of the second scraping mechanism 602, and a third guide rod 503 for guiding the translation of the third scraping mechanism 603. Through the setting of the guide mechanism 5, the first guide rod 501, the second guide rod 502 and the third guide rod 503 respectively provide a balanced guiding function for the first scraping mechanism 601, the second scraping mechanism 602 and the third scraping mechanism 603 during reciprocating translation, thereby avoiding the internal components of the cleaning mechanism 6 from damaging the outer wall of the inner flow tube 105.

[0051] Specifically, the screw mechanism 7 includes a first screw 701 for driving the first scraping mechanism 601 to move in translation, a second screw 702 for driving the second scraping mechanism 602 to move in translation, and a third screw 703 for driving the third scraping mechanism 603 to move in translation. Through the setting of the screw mechanism 7, the transmission effect of the gear set 8 and the transmission mechanism 9 can be utilized to allow the output shaft of the drive motor 103 to rotate and drive the first screw 701, the second screw 702 and the third screw 703 to rotate synchronously, providing the cleaning mechanism 6 with a heat exchanger 1. To perform reciprocating movement, the first screw rod 701, the second screw rod 702, and the third screw rod 703 are all installed in a sleeve connection with the deflector plate 104 through bearings. The positions where the first screw rod 701, the second screw rod 702, the third screw rod 703 are installed with the deflector plate 104 have no texture settings, which facilitates the installation of the bearings, so that the rotation of the first screw rod 701, the second screw rod 702, and the third screw rod 703 cannot change the use position of the deflector plate 104 (the setting of the deflector plate 104 is the existing technology and will not be repeated in this application).

[0052] Specifically, the first scraping mechanism 601 includes a first slider 6011 that is sleeved with the first screw rod 701, the first slider 6011 is provided with a vertically extending connecting frame 6012, the connecting frame 6012 is provided with a balancing frame 6013, the balancing frame 6013 is provided with a first guide hole 6014 for sleeved with the first guide rod 501, and the balancing frame 6013 is provided with a mounting hole 6015 for sleeved with the mounting frame 61. Through the splicing arrangement of the first scraping mechanism 601 and the mounting frame 61, the surface attachments of the inner flow tube 105 located in the middle of the inner cavity of the heat exchanger 1 are scraped off.

[0053] Specifically, the second scraping mechanism 602 includes a second slider 6021 sleeved with the second screw rod 702. The second slider 6021 is provided with an upper scraper 6022 for scraping crystals from the surface of the inner flow tube 105. The upper scraper 6022 is provided with a second guide hole 6023 for sleeved with the second guide rod 502. The end of the upper scraper 6022 is provided with a second scraper 6024 for scraping crystals from the surface of the inner flow tube 105.

[0054] The third scraping mechanism 603 includes a third slider 6031 sleeved with the third screw rod 703. The third slider 6031 is provided with a lower scraper 6032 for scraping crystals on the surface of the inner flow tube 105. The lower scraper 6032 is provided with a third guide hole 6033 for sleeved with the third guide rod 503. The end of the lower scraper 6032 is provided with a third scraper 6034 for scraping crystals on the surface of the inner flow tube 105.

[0055] The installation direction of the first scraping mechanism 601 is mirrored to the installation direction of the second scraping mechanism 602. The second scraping mechanism 602 and the third scraping mechanism 603 are mirrored, and can perform scraping operations on the surface of the inner flow tube 105 at the upper and lower parts of the inner cavity of the heat exchanger 1. The second scraping mechanism 602 and the third scraping mechanism 603 can be installed interchangeably without affecting their actual scraping effect. In cooperation with the first scraping mechanism 601 and the mounting frame 61, a comprehensive surface scraping treatment is performed on the entire inner flow tube 105 inside the heat exchanger 1.

[0056] Specifically, a first scraper 63 that can be detached and cleaned is provided in the mounting frame 61, and an embedded groove 62 for installing the first scraper 63 is provided in the mounting frame 61. The first scraper 63 is provided with bristles 631 for scraping off crystals on the surface of the inner flow tube 105. The mounting frame 61 is detachable and can be directly spliced with the first scraping mechanism 601, so that the first scraper 63 installed on the mounting frame 61 can be easily disassembled and installed to complete the cleaning operation and avoid excessive accumulation of impurities on the first scraper 63 affecting its scraping effect. The upper scraper 6022, the second scraper 6024, the lower scraper 6032 and the third scraper 6034 can all be installed and processed using its design method.

[0057] Specifically, the heat exchanger 1 is provided with a first feed end 101 for discharging the crude product, and the heat exchanger 1 is provided with a second feed end 102 for introducing the crude product. The first feed end 101 is provided with a gear set 8 connected to the output shaft of the drive motor 103, and the first feed end 101 is provided with a transmission mechanism 9 connected to the screw mechanism 7. The high-temperature sulfur monochloride is introduced into the interior of the inner flow pipe 105 through the second feed end 102, and is transported to the interior of the storage tank 4 through the first feed end 101 for storage. When the sulfur monochloride passes through the interior of the inner flow pipe 105, thionyl chloride is introduced from the crude product tank 3 in the shell side of the heat exchanger 1, and the temperature difference contact forms a temperature exchange. The heated thionyl chloride is introduced into the interior of the deweighting tower 2 through the heat exchanger 1 for the next step of processing.

[0058] Specifically, the transmission mechanism 9 includes a first transmission rod 901 connected to the first screw rod 701 , a second transmission rod 902 connected to the second screw rod 702 , and a third transmission rod 903 connected to the third screw rod 703 ;

[0059] The gear set 8 includes a splicing box 801 located in the first feeding end 101, an upper driven gear 804 connected to the second transmission rod 902 is provided in the splicing box 801, a lower driven gear 805 connected to the third transmission rod 903 is provided in the splicing box 801, a driving gear 803 connected to the first transmission rod 901 and the output shaft of the drive motor 103 is provided in the splicing box 801, and a gear for meshing and splicing the driving gear 803, the upper driven gear 804 and the lower driven gear 805 are provided in the splicing box 801. The transmission gear 802 of the lower driven gear 805 provides a power transmission path for the screw mechanism 7 through the setting of the gear group 8 and the transmission mechanism 9, so that the transmission of the drive motor 103 is dispersed to the driving gear 803, the upper driven gear 804 and the lower driven gear 805, and then transmitted respectively by the first transmission rod 901, the second transmission rod 902 and the third transmission rod 903, so that the first screw rod 701, the second screw rod 702 and the third screw rod 703 can rotate synchronously.

[0060] Working principle: In the present invention, the high-temperature sulfur monochloride is introduced into the internal flow pipe 105 through the second feeding end 102 by the pipeline at the bottom of the deweighting tower 2 for internal circulation, and the thionyl chloride inside the crude product tank 3 is introduced into the shell side of the heat exchanger 1. The temperature difference between sulfur monochloride and thionyl chloride is exchanged through the tube wall of the inner flow tube 105, so that the temperature of sulfur monochloride is reduced and the temperature of thionyl chloride is increased. Through the circulation treatment, the exchanged sulfur monochloride will be introduced into the internal storage of the storage tank 4 through the first feeding end 101, and the exchanged thionyl chloride will flow into the interior of the deweighting tower 2 through the pipeline for the next step of treatment. When the outer wall of the inner flow tube 105 needs to be cleaned, the drive is turned on. The motor 103 allows the output shaft of the drive motor 103 to drive the driving gear 803 to rotate, and through the meshing transmission of the transmission gear 802, the upper driven gear 804 and the lower driven gear 805 can rotate synchronously, so that the first transmission rod 901, the second transmission rod 902 and the third transmission rod 903 can drive the first screw rod 701, the second screw rod 702 and the third screw rod 703 to rotate, allowing the first scraping mechanism 601, the second scraping mechanism 602 and the third scraping mechanism 603 to scrape the outer wall of the inner flow tube 105 located in the middle, upper and lower parts of the inner cavity of the heat exchanger 1 respectively, so that impurities or crystals attached to the outer wall of the inner flow tube 105 fall off.

[0061] Example 2

[0062] A method for comprehensive energy utilization of a thionyl chloride distillation tower comprises the following steps:

[0063] S1: The high-temperature sulfur monochloride discharged from the bottom of the deweighting tower 2 is introduced into the tube side of the heat exchanger 1 through a pipeline, and the low-temperature crude thionyl chloride discharged from the crude product tank 3 is introduced into the shell side of the heat exchanger 1 to allow the two to exchange heat;

[0064] S2: low-temperature crude thionyl chloride is introduced into the shell side of heat exchanger 1. After heat exchange in heat exchanger 1, the crude thionyl chloride is again introduced into deweighting tower 2. The temperature of the crude thionyl chloride before heat exchange is 50-60°C, and the temperature of the crude thionyl chloride after heat exchange is 80-90°C.

[0065] S3: The high-temperature sulfur monochloride introduced into the pipe line of the heat exchanger 1 undergoes heat exchange treatment inside the heat exchanger 1 and is then introduced into the storage tank 4 through the chemical pipeline for storage. The temperature of the sulfur monochloride before heat exchange is 125-135°C and after heat exchange is 80-100°C.

[0066] S4: The temperatures of crude thionyl chloride and sulfur monochloride before and after heat exchange are measured by thermometer, and calculated by flow meter, 130 kg of steam is saved per ton of thionyl chloride.

[0067] Example 3

[0068] Reference Figure 1 The difference between this embodiment and embodiment 2 is that the temperature of the crude thionyl chloride product before heat exchange is 60-70°C, and the temperature of the crude thionyl chloride product after heat exchange is 90-100°C; the temperature of sulfur monochloride before heat exchange is 125-135°C, and the temperature of sulfur monochloride after heat exchange is 100-110°C. According to flow meter calculation, 200kg of steam is saved per ton of thionyl chloride.

[0069] For other structures not described, refer to Example 2.

[0070] Example 4

[0071] Reference Figure 1 The difference between this embodiment and embodiment 2 is that the temperature of the crude thionyl chloride product before heat exchange is 70-80°C, and the temperature of the crude thionyl chloride product after heat exchange is 100-110°C. The temperature of sulfur monochloride before heat exchange is 135-145°C, and the temperature of sulfur monochloride after heat exchange is 110-120°C. According to flow meter calculation, 100kg of steam is saved per ton of thionyl chloride.

[0072] For other structures not described, refer to Example 2.

[0073] According to the implementation results of Examples 2-4, the low-temperature crude thionyl chloride and the high-temperature sulfur monochloride exchange heat in the heat exchanger 1. Calculated by the steam flow meter, Example 2 has the best effect, greatly reducing energy loss and basically achieving the maximum heat recycling effect.

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0075] In the present invention, unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0076] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by a person skilled in the art. The provision of power is also common knowledge in the art. The present invention is mainly used to protect mechanical devices, so the control method and circuit connection are not explained in detail in the present invention.

[0077] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A thionyl chloride distillation tower energy comprehensive utilization system, comprising a heat exchanger (1), a weight removal tower (2), a crude product tank (3) and a storage tank (4), characterized in that: The heat exchanger (1), the deweighting tower (2), the crude product tank (3) and the storage tank (4) are connected by a chemical pipeline. The heat exchanger (1) is provided with a driving motor (103) for rotating output. The heat exchanger (1) is provided with a baffle (104). The heat exchanger (1) is provided with an inner flow pipe (105) for circulating sulfur monochloride. The heat exchanger (1) is provided with a cleaning mechanism (6) for cleaning crystals on the surface of the inner flow pipe (105). The cleaning mechanism (6) comprises a first scraping mechanism (601) located in the middle of the inner cavity of the heat exchanger (1), a second scraping mechanism (602) located in the upper part of the inner cavity of the heat exchanger (1), and a third scraping mechanism (603) located in the lower part of the inner cavity of the heat exchanger (1), wherein the first scraping mechanism (601) is provided with a mounting frame (61), the cleaning mechanism (6) is provided with a screw mechanism (7) for driving the translation thereof, and the cleaning mechanism (6) is provided with a guide mechanism (5) for guiding; The first scraping mechanism (601) comprises a first sliding block (6011) sleeved with the first screw rod (701); the first sliding block (6011) is provided with a vertically extending connecting frame (6012); the connecting frame (6012) is provided with a balancing frame (6013); the balancing frame (6013) is provided with a first guide hole (6014) sleeved with the first guide rod (501); the balancing frame (6013) is provided with a mounting hole (6015) for sleeved with the mounting frame (61); The second scraping mechanism (602) comprises a second slider (6021) sleeved with the second screw rod (702); the second slider (6021) is provided with an upper scraper (6022) for scraping off crystals on the surface of the inner flow tube (105); the upper scraper (6022) is provided with a second guide hole (6023) for sleeved with the second guide rod (502); and the end of the upper scraper (6022) is provided with a second scraper (6024) for scraping off crystals on the surface of the inner flow tube (105); The third scraping mechanism (603) comprises a third slider (6031) sleeved with the third screw rod (703); the third slider (6031) is provided with a lower scraper (6032) for scraping crystals on the surface of the inner flow tube (105); the lower scraper (6032) is provided with a third guide hole (6033) for sleeved with the third guide rod (503); and the end of the lower scraper (6032) is provided with a third scraper (6034) for scraping crystals on the surface of the inner flow tube (105); The installation orientation of the first scraping mechanism (601) and the installation orientation of the second scraping mechanism (602) are mirror images.

2. A thionyl chloride rectification tower energy comprehensive utilization system according to claim 1, characterized in that: The guide mechanism (5) comprises a first guide rod (501) for guiding the translation of the first scraping mechanism (601), a second guide rod (502) for guiding the translation of the second scraping mechanism (602), and a third guide rod (503) for guiding the translation of the third scraping mechanism (603).

3. A thionyl chloride distillation tower energy comprehensive utilization system according to claim 1, characterized in that: The screw mechanism (7) comprises a first screw (701) for driving the first scraping mechanism (601) to move in translation, a second screw (702) for driving the second scraping mechanism (602) to move in translation, and a third screw (703) for driving the third scraping mechanism (603) to move in translation.

4. A thionyl chloride distillation tower energy comprehensive utilization system according to claim 1, characterized in that: A detachable and cleanable first scraper (63) is provided in the mounting frame (61), an embedded groove (62) for mounting the first scraper (63) is provided in the mounting frame (61), and bristles (631) for scraping off crystals on the surface of the inner flow tube (105) are provided on the first scraper (63).

5. A thionyl chloride distillation tower energy comprehensive utilization system according to claim 1, characterized in that: The heat exchanger (1) is provided with a first feed end (101) for discharging the crude product, and a second feed end (102) for introducing the crude product. The first feed end (101) is provided with a gear set (8) connected to the output shaft of the drive motor (103), and the first feed end (101) is provided with a transmission mechanism (9) connected to the screw mechanism (7).

6. A thionyl chloride distillation tower energy comprehensive utilization system according to claim 5, characterized in that: The transmission mechanism (9) comprises a first transmission rod (901) connected to the first screw rod (701), a second transmission rod (902) connected to the second screw rod (702), and a third transmission rod (903) connected to the third screw rod (703); The gear set (8) comprises a splicing box (801) located in the first feeding end (101), an upper driven gear (804) connected to the second transmission rod (902) is provided in the splicing box (801), a lower driven gear (805) connected to the third transmission rod (903) is provided in the splicing box (801), a driving gear (803) connected to the first transmission rod (901) and the output shaft of the driving motor (103) is provided in the splicing box (801), and a transmission gear (802) for meshing and splicing the driving gear (803), the upper driven gear (804) and the lower driven gear (805) is provided in the splicing box (801).

7. A method for comprehensive energy utilization of a thionyl chloride distillation tower, using a system for comprehensive energy utilization of a thionyl chloride distillation tower according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: The high-temperature sulfur monochloride discharged from the bottom of the deweighting tower (2) is introduced into the tube side of the heat exchanger (1) through a pipeline, and the low-temperature crude thionyl chloride discharged from the crude product tank (3) is introduced into the shell side of the heat exchanger (1) to allow the two to exchange heat; S2: low-temperature crude thionyl chloride is introduced into the shell side of the heat exchanger (1). After heat exchange in the heat exchanger (1), the crude thionyl chloride is introduced into the deweighting tower (2) again. The temperature of the crude thionyl chloride before heat exchange is 50-60°C, and the temperature of the crude thionyl chloride after heat exchange is 80-90°C. S3: The high-temperature sulfur monochloride introduced into the pipe line of the heat exchanger (1) is introduced into the storage tank (4) through the chemical pipeline for storage after heat exchange treatment inside the heat exchanger (1). The temperature of the sulfur monochloride before heat exchange is 125-135°C, and the temperature of the sulfur monochloride after heat exchange is 80-100°C. S4: Measure the temperature of crude thionyl chloride and sulfur monochloride before and after heat exchange using a thermometer.

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