Device for continuously preparing sulfur sheets by using waste sulfur solution and working method of device

Abstract

The invention discloses a device for continuously preparing sulfur sheets by using a waste sulfur solution and a working method thereof, and belongs to the technical field of sulfur purification, the device comprises a waste sulfur tank, and a medium-temperature kettle, a high-temperature kettle, an evaporation kettle, a condensation kettle, a cooling tank and a slicing machine which are connected in sequence; an extraction mechanism and a first pressure release valve are arranged at the top end of the medium-temperature kettle; a second pressure release valve is arranged at the top end of the high-temperature kettle; the medium-temperature kettle, the high-temperature kettle and the cooling tank are respectively connected with a tail gas absorption tower through tail gas pipes and are respectively connected with a nitrogen source through nitrogen pipes, each tail gas pipe is provided with a tail gas pump, and each nitrogen pipe is provided with a nitrogen pump; the hot blast stove is sequentially connected in series with the evaporation kettle coil, the high-temperature kettle coil, the medium-temperature kettle coil and the waste sulfur tank coil through air pipes; and oil cooling devices are arranged on the condensation kettle, the waste sulfur tank and the cooling tank. By coupling gradient temperature control with a multi-stage turbid liquid separation mechanism, high-efficiency evaporation of sulfur is guaranteed, directional migration and concentrated discharge of tar impurities are realized, and system stability and product consistency are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of sulfur purification technology, specifically relating to an apparatus and its working method for continuously preparing sulfur flakes using waste sulfur solution. Background Technology

[0002] Current sulfur recovery processes generally suffer from problems such as high energy consumption, incomplete impurity removal, and low continuity. In particular, when dealing with waste sulfur solutions containing tar-like impurities, equipment coking, reduced heat transfer efficiency, and fluctuations in product purity are easily caused. At the same time, during sulfur purification, it is difficult to ensure continuous operation of each process, which can easily lead to flash fires and unsafe production. Summary of the Invention

[0003] The purpose of this invention is to provide an apparatus and its working method for the continuous preparation of sulfur flakes using waste sulfur solution. Through a gradient temperature-controlled multi-stage turbid liquid separation mechanism, while ensuring efficient sulfur evaporation, it achieves the directional and safe migration and centralized discharge of tar impurities, significantly improving system stability and product consistency.

[0004] An apparatus for continuously preparing sulfur flakes using waste sulfur solution, characterized in that it comprises a waste sulfur tank and, in sequence, a medium-temperature reactor, a high-temperature reactor, an evaporation reactor, a condensation reactor, a cooling tank, and a slicing machine; the top of the medium-temperature reactor is equipped with an extraction mechanism and a first pressure relief valve, and the extraction mechanism is equipped with a lifting suction pipe with a viscosity measuring instrument that can extend into the medium-temperature reactor; the top of the high-temperature reactor is equipped with a second pressure relief valve; the extraction mechanism, the first pressure relief valve, the second pressure relief valve, the first turbidity valve at the bottom of the medium-temperature reactor, the second turbidity valve at the bottom of the high-temperature reactor, and the third turbidity valve at the bottom of the evaporation reactor are respectively connected to the inlet of the waste sulfur tank via pipelines; the middle part of the medium-temperature reactor is connected to the middle part of the high-temperature reactor via a bypass pipe equipped with a bypass valve; the bottom of the high-temperature reactor is connected to the evaporation reactor inlet pipe at the top of the evaporation reactor, and the inside of the evaporation reactor... A series of coaxially arranged ring pipes are connected in series. The outer radial side of the ring pipes has several spray holes that spray sulfur liquid onto the inner side of the evaporator. The top of the evaporator has an outlet connected to the air inlet of the condenser. The liquid outlet of the condenser is connected to the liquid inlet of the cooling tank. The condenser is equipped with a pressure relief valve, which is connected to the tail gas absorption tower through a pressure relief pipe. The liquid outlet of the cooling tank is connected to the liquid inlet of the slicer. The medium-temperature reactor, high-temperature reactor, and cooling tank are connected to the tail gas absorption tower through tail gas pipes and to a nitrogen source through nitrogen pipes. Each tail gas pipe is equipped with a tail gas pump, and each nitrogen pipe is equipped with a nitrogen pump. The hot air furnace is connected in series with the evaporator coil, high-temperature reactor coil, medium-temperature reactor coil, and waste sulfur tank coil through air ducts. The condenser, waste sulfur tank, and cooling tank are all equipped with oil cooling devices.

[0005] During operation, molten waste sulfur is introduced into a medium-temperature reactor, where it is heated to 200-300 degrees Celsius. The volatilized tar-like impurities are then introduced into the tail gas absorption tower. The retractable suction pipe of the suction mechanism is lowered below the liquid surface in the medium-temperature reactor. The viscosity of the molten sulfur is monitored in real time using a viscosity meter. When the viscosity reaches a set threshold, the retractable suction pipe stops descending, and the liquid above the end of the pipe is removed. The liquid flows from the medium-temperature reactor into the high-temperature reactor through a bypass pipe. The turbid liquid at the bottom of the medium-temperature reactor is discharged into the waste sulfur tank through the first turbidity valve. In the high-temperature reactor, the molten waste sulfur is heated to 300-400 degrees Celsius, and the volatilized tar-like impurities are further removed. Impurity gases are introduced into the tail gas absorption tower, and liquid is introduced into the evaporation kettle. The turbid liquid at the bottom of the high-temperature kettle is discharged into the waste sulfur tank through the second turbidity valve. Inside the evaporation kettle, liquid is sprayed into the inner side of the evaporation kettle through the nozzle of the ring pipe, controlling the temperature inside the evaporation kettle so that the upper layer temperature is 550-600℃ and the lower layer temperature is 450-480℃, so that the sulfur in the liquid evaporates into sulfur vapor, which is input into the condensation kettle. The residual liquid impurities are discharged into the waste sulfur tank through the third turbidity valve. Inside the condensation kettle, the sulfur vapor is condensed into liquid sulfur and enters the cooling tank, where the liquid sulfur is cooled to 130-135℃. The liquid sulfur is condensed into solid in the slicer and sliced ​​for output.

[0006] Its beneficial effects are as follows: In the medium-temperature and high-temperature reactors, volatile impurities such as tar and non-volatile impurities such as sulfates and heavy metals are separated twice. Especially in the medium-temperature reactor, the retractable suction pipe allows for the simultaneous precipitation and removal of some low-boiling-point components that have not yet volatilized along with heavy tar, resulting in thorough impurity treatment. In the evaporation reactor, sulfur is evaporated, further separating it from the impurities. The product is then sliced ​​and output, featuring continuous operation throughout the entire process and thorough impurity separation. Through multi-stage separation and continuous design, this device significantly improves the resource utilization rate of waste sulfur, achieving a sulfur flake purity exceeding 99.5%, and increasing production capacity by more than three times compared to traditional intermittent processes. A hot air furnace supplies 600°C high-temperature hot air, which enters the upper part of the evaporator coil and flows out from the lower part, controlling the temperature inside the evaporator to be 550-600°C for the upper layer and 450-480°C for the lower layer. The hot air flowing out from the lower part of the evaporator coil then enters the high-temperature reactor coil, heating the molten waste sulfur to 300-400°C. The hot air flowing out from the high-temperature reactor coil then enters the medium-temperature reactor coil, heating the molten waste sulfur to 200-300°C. Finally, the hot air flowing from the medium-temperature reactor coil enters the waste sulfur tank coil to maintain the temperature of the slag liquid within the tank. When the slag liquid in the waste sulfur tank accumulates to a certain amount, its temperature is reduced to 120-125°C through the tank's oil cooling device before discharge, preventing flash combustion during discharge. This method fully utilizes hot air, reducing energy consumption by approximately 40% compared to existing technologies that use hot air to heat heat transfer oil and then use the oil to heat various production units, effectively improving energy efficiency. Simultaneously, precise temperature control ensures that each reaction stage operates under optimal conditions, thereby improving sulfur evaporation efficiency and condensation quality, further enhancing the purity and yield of sulfur flakes. Furthermore, liquid sulfur is cooled to 130-135℃ in a cooling tank before slicing. The medium-temperature reactor, high-temperature reactor, and cooling tank are all connected to a nitrogen source via nitrogen pipes to prevent flashover at each stage, ensuring production safety.

[0007] During condensation, waste sulfur vapor mixed with high-temperature combustible tar gas suddenly enters the condenser. Since the condenser cannot be protected with nitrogen, a gas explosion can occur if the high-temperature combustible tar gas suddenly enters and air is present in the condenser. This invention addresses this problem by installing a pressure relief valve on the condenser, which is connected to the tail gas absorption tower via a pressure relief pipe. This solves the problem of a gas explosion caused by the sudden entry of waste sulfur vapor mixed with high-temperature combustible tar gas into the condenser when nitrogen protection is not available. The first and second pressure relief valves can release pressure under high pressure conditions inside the condenser, making it safer to use. The entire device has a compact structure, a reasonable layout, and tight connections between components, ensuring continuous and stable operation throughout the process and reducing failure rates and maintenance costs.

[0008] As a preferred technical solution, the top of the intermediate-temperature reactor is equipped with an intermediate-temperature reactor inlet valve, which is sequentially connected to a filter and a waste sulfur melting device; an evaporation reactor coil is provided on the outer surface of the evaporation reactor; a high-temperature reactor coil is provided on the outer surface of the high-temperature reactor; an intermediate-temperature reactor coil is provided on the outer surface of the intermediate-temperature reactor; a waste sulfur tank pan is provided inside the waste sulfur tank; air pumps are provided on each air duct; the suction mechanism includes a lifting drive motor, a lead screw pair, and a lifting suction pipe; the lifting drive motor is connected to the lifting suction pipe through the lead screw pair; the lifting suction pipe is connected to the waste sulfur tank inlet through a first pipeline; a light liquid pump is provided on the first pipeline. The second pressure relief valve is connected to the inlet of the waste sulfur tank via the second pipeline; the first turbid valve is connected to the inlet of the waste sulfur tank via the third pipeline; the second turbid valve is connected to the inlet of the waste sulfur tank via the fourth pipeline; the third turbid valve is connected to the inlet of the waste sulfur tank via the fifth pipeline; the bottom of the high-temperature kettle and the top of the evaporation kettle are connected by the evaporation kettle inlet pipe via the first connecting pipe; the condensation kettle inlet and the evaporation kettle top outlet are connected by the second connecting pipe; the condensation kettle outlet and the cooling tank inlet are connected by the third connecting pipe; the cooling tank outlet and the slicer inlet pipe are connected by the fourth connecting pipe.

[0009] As a preferred technical solution, the intermediate-temperature reactor is equipped with a first pressure gauge, a first level gauge, and a first thermometer; the bottom of the intermediate-temperature reactor is equipped with a first slag outlet, a first slag gate is hinged to the first slag outlet, the first slag gate is equipped with a first filter hole, the top of the first filter hole is equipped with a first filter screen, and the bottom of the first filter hole is equipped with a first turbidity valve; the middle of the intermediate-temperature reactor is equipped with a liquid outlet, and the inner side of the liquid outlet is equipped with a second filter screen; the intermediate-temperature reactor is equipped with a first stirrer, which is connected to a first stirring motor located at the top of the intermediate-temperature reactor; the middle of the high-temperature reactor is equipped with a liquid inlet, and the liquid outlet of the intermediate-temperature reactor is connected to the liquid inlet of the high-temperature reactor through a bypass pipe.

[0010] As a preferred technical solution, the high-temperature reactor is equipped with a second thermometer, a second level gauge, and a second pressure gauge; a second slag outlet is provided at the bottom of the high-temperature reactor, and a second slag gate is connected to the second slag outlet, with a second filter hole on the second slag gate, a third filter screen at the top of the second filter hole, and a second turbidity valve at the bottom of the second filter hole; a high-temperature reactor liquid outlet is provided above the second slag outlet, with a fourth filter screen on the high-temperature reactor liquid outlet; a second stirrer is provided inside the high-temperature reactor, and the second stirrer is connected to a second stirring motor located at the top of the high-temperature reactor.

[0011] As a preferred technical solution, the evaporator is equipped with a third stirrer, which is connected to a third stirring motor located at the top of the evaporator. The outer side of the third stirrer is equipped with several brushes, each of which contacts the radial inner surface of the high-temperature vessel. The annular pipe is fixed to the inner side of the evaporator through several connectors. There is a downward angle of 15-45° between the central axis of the spray hole and the tangent at the midpoint of the outer side of the spray hole of the annular pipe. The bottom of the evaporator is equipped with a third slag outlet, which is connected to a third slag gate. The third slag gate is equipped with a third filter hole, the top of which is equipped with a fifth filter screen, and the bottom of which is equipped with a third turbidity valve. The evaporator is equipped with a third thermometer, a third level gauge, and a third pressure gauge.

[0012] As a preferred technical solution, the condenser includes a cylindrical condenser body arranged vertically; the top of the condenser body is connected to a condenser cover, and the bottom of the condenser body is connected to a condenser bottom; the condenser cover has a condenser exhaust port connected to an exhaust pipe; the bottom of the side wall of the condenser body has a condenser liquid outlet, and the middle of the side wall of the condenser body has a condenser air inlet; the top of the inner hole of the condenser body has a top sealing plate, and the bottom of the inner hole of the condenser body has a bottom sealing plate; a middle sealing plate is provided above the condenser liquid outlet of the inner hole of the condenser body; the bottom sealing plate has several vertically arranged lower through holes, the middle... Below each lower through hole on the sealing plate is an upper through hole with the same diameter as the lower through hole. Each lower through hole is connected to the upper through hole above and below it through a heat exchange tube. Several lower connecting holes are arranged in a ring on the side wall of the condenser body. Each lower connecting hole is located between the bottom sealing plate and the air inlet of the condenser body. Above each lower connecting hole on the condenser body cover is an upper connecting hole. Each lower connecting hole and the upper connecting hole above it are connected by a bent pipe. A low-temperature oil outlet is provided on the bottom of the condenser body. A low-temperature oil inlet is provided between the middle sealing plate and the top sealing plate of the condenser body. A pressure relief valve is provided on the side wall of the condenser body.

[0013] As a preferred technical solution, the oil cooling device of the condenser includes a condenser oil tank equipped with a heat dissipation device, a low-temperature oil inlet connected to the condenser oil tank through a second oil pipe, a low-temperature oil outlet connected to the condenser oil tank through a first oil pipe, and a first low-temperature oil pump installed on the second oil pipe or the first oil pipe.

[0014] As a preferred technical solution, a tail gas collection space is formed between the condenser lid and the top sealing plate, and a tail gas collection space pressure sensor is provided on the condenser lid; the distance between the top and middle sealing plates is less than one-tenth of the distance between the middle sealing plate and the bottom sealing plate; the heat exchange tubes are arranged in parallel in the heat exchange space formed between the bottom sealing plate and the middle sealing plate; the heat exchange tubes are distributed in a spiral, the axial direction of the spiral is set perpendicularly, and a number of heat dissipation fins are provided on the outer surface of each heat exchange tube.

[0015] As a preferred technical solution, the cooling tank is equipped with a fourth thermometer, a fourth level gauge, and a fourth pressure gauge; the oil cooling device of the cooling tank includes a cooling tank oil tank equipped with a heat dissipation device, and several first columns are connected to the inner side wall of the cooling tank, which are arranged vertically to each first column and arranged in a ring array along the central axis of the cooling tank, and each first column is connected to a first cooling oil coil; the first cooling oil coil passes through the side wall of the cooling tank, the oil inlet end of the first cooling oil coil is connected to the cooling tank oil tank through a third oil pipe, and the oil outlet end of the first cooling oil coil is connected to the cooling tank oil tank through a fourth oil pipe, and a second low-temperature oil pump is provided on the third oil pipe or the fourth oil pipe; the top of the cooling tank is provided with a cooling tank inlet and the bottom is provided with a cooling tank outlet; the bottom of the cooling tank is provided with a fourth slag outlet, and a fourth slag gate is connected to the fourth slag outlet.

[0016] As a preferred technical solution, the slicer is located inside the slicing chamber; the slicer is equipped with a water cooling device; a conveyor belt outlet is horizontally located at the bottom end of the sulfur slicing chamber; the slicer includes a roller; a frame is installed inside the sulfur slicing chamber; a conveyor belt is horizontally installed on the frame; one end of the conveyor belt passes through the conveyor belt outlet; a roller and a roller drive device are vertically installed above the conveyor belt on the frame; the roller has an inner cavity for holding cooling water; the inner cavity is connected to a water tank externally through two water pipes, one of which is equipped with a water pump; the top of the conveyor belt outlet is vertically... A rubber sheet is hinged, with its lower edge located outside the sulfur slicing chamber and in close contact with the conveyor belt surface. Inside the sulfur slicing chamber, a sulfur liquid nozzle is installed close to the upper right of the roller, connected to the inlet pipe of the slicing machine. A non-metallic scraper is located below the lower left of the sulfur liquid nozzle, connected to the sulfur slicing chamber or frame. The scraper contacts the radial outer circumference of the roller and is located above the central axis of the roller and above the conveyor belt. An exhaust fan is installed in the sulfur slicing chamber, connected to the exhaust gas absorption tower via a tail gas pipe.

[0017] As a preferred technical solution, the frame is equipped with bearings at both the front and rear ends above the conveyor belt. These two bearings are connected to a longitudinally arranged rotating shaft, which is connected to a roller. The central axis of the roller and the central axis of the rotating shaft are aligned. Blind holes are provided at both the front and rear ends of the rotating shaft, each blind hole having a liquid passage hole for communicating with the inner cavity of the roller. A mechanically sealed rotary joint is connected to the end of each blind hole on the frame furthest from the other blind hole. The mechanically sealed rotary joint has a water inlet hole and a cavity communicating with the water inlet hole. The water inlet holes of each mechanically sealed rotary joint are respectively... The drum is connected to a water tank via a water pipe; the cavity of each mechanical seal rotary joint is connected to the nearest blind hole on the shaft; each mechanical seal rotary joint is connected to the nearest bearing; cooling water enters the inner cavity of the drum through a mechanical seal rotary joint and the nearest blind hole on the shaft, and then flows into the water tank from another blind hole on the shaft and the mechanical seal rotary joint closest to the blind hole; the drum drive device includes a drum drive motor mounted on the frame; a drive wheel is coaxially mounted on the shaft, and the drive wheel is connected to the drum drive motor via a chain.

[0018] As a preferred technical solution, the waste tank is equipped with a fifth thermometer, a fifth level gauge, and a fifth pressure gauge; the oil cooling device of the waste tank includes a waste tank oil tank, and several third columns are connected to the inner sidewall of the waste tank, arranged vertically to each third column and arranged in a ring array along the central axis of the cooling tank; each third column is connected to a second cooling oil coil; the second cooling oil coil passes through the sidewall of the waste tank, the oil inlet of the second cooling oil coil is connected to the waste tank oil tank through a fifth oil pipe, and the oil outlet of the second cooling oil coil is connected to the waste tank oil tank through a sixth oil pipe. A third cryogenic oil pump is installed on the fifth or sixth oil pipe; a waste sulfur tank inlet is located at the top of the waste tank and a waste tank outlet is located at the bottom; a fifth slag discharge gate is hinged to the waste tank outlet; the fifth slag discharge gate is connected to a fifth slag discharge gate drive cylinder, and the fifth slag discharge gate drive cylinder is connected to the waste tank support; a sedimentation tank containing water is located below the fifth slag discharge gate; several fifth columns are connected to the inner sidewall of the waste tank, arranged vertically to each fifth column and arranged in a ring along the central axis of the cooling tank, and each fifth column is connected to a waste sulfur tank plate passing through the sidewall of the waste tank.

[0019] The operating method of any of the above-mentioned apparatuses for continuously preparing sulfur flakes from waste sulfur solution is characterized by comprising the following steps: Step 1: The molten waste sulfur is introduced into a medium-temperature reactor and heated to 200-300 degrees Celsius. The volatilized tar-like impurities are introduced into the tail gas absorption tower. The retractable suction pipe of the suction mechanism is activated and lowered below the liquid surface in the medium-temperature reactor. The viscosity of the molten sulfur liquid is monitored in real time using a viscosity meter. When the viscosity reaches a set threshold, the retractable suction pipe stops descending, and the liquid above the end of the retractable suction pipe is removed. The liquid from the medium-temperature reactor flows into the high-temperature reactor through a bypass pipe. The turbid liquid at the bottom of the medium-temperature reactor is discharged into the waste sulfur tank through the first turbidity valve. Step 2: Heat the waste sulfur melt to 300-400 degrees Celsius in a high-temperature reactor, introduce the volatilized tar-like impurity gas into the tail gas absorption tower, and introduce the liquid into the evaporation reactor; the turbid liquid at the bottom of the high-temperature reactor is discharged into the waste sulfur tank through the second turbidity valve. Step 3: In the evaporator, the liquid is sprayed into the inner side of the evaporator through the nozzle of the ring pipe. The temperature inside the evaporator is controlled so that the upper temperature is 550-600℃ and the lower temperature is 450-480℃, so that the sulfur in the liquid evaporates into sulfur vapor and enters the condenser. The residual liquid impurities are discharged into the waste sulfur tank through the third turbidity valve. Step 4: In the condenser, sulfur vapor is condensed into liquid sulfur and enters the cooling tank, where the liquid sulfur is cooled to 130-135℃. Step 5: The liquid sulfur is solidified into a solid in the slicer and then sliced ​​and output. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a preferred embodiment of the apparatus for continuously preparing sulfur flakes using waste sulfur solution according to the present invention. Figure 2 yes Figure 1 A magnified view of part A. Figure 3 yes Figure 2 A magnified view of part E. Figure 4 yes Figure 2 A magnified view of part F. Figure 5 yes Figure 2 A magnified view of part G. Figure 6 yes Figure 2 A magnified view of part H. Figure 7 yes Figure 1 A magnified view of part B. Figure 8 yes Figure 7 A magnified view of part I. Figure 9 yes Figure 7 A magnified view of part J. Figure 10 yes Figure 1 A magnified view of part C. Figure 11 yes Figure 10 A magnified view of part K. Figure 12 yes Figure 10 A magnified view of part L. Figure 13 yes Figure 10 A magnified view of part M. Figure 14 yes Figure 1 A magnified view of part D. Figure 15 yes Figure 14 A magnified view of part N. Figure 16 yes Figure 15 A magnified view of part S. Figure 17 yes Figure 15 A magnified view of part T. Figure 18 yes Figure 14 A magnified view of part O. Figure 19 yes Figure 14 A magnified view of part P. Figure 20 yes Figure 14 A magnified view of part Q. Figure 21 yes Figure 14 A magnified view of the R part. Figure 22 yes Figure 21 A magnified view of the U-shaped portion. Figure 23 yes Figure 21 A magnified view of part V. Figure 24 yes Figure 21 A magnified view of part W. Figure 25 This is a schematic diagram of the roller structure. Figure 26 yes Figure 25 A magnified view of part X. Figure 27 yes Figure 25 A magnified view of the Y-section.

[0021] The components include: a medium-temperature autoclave-1; a viscosity meter-102; a lifting suction pipe-101; a lifting drive motor-103; a lead screw pair-104; a filter-106; a waste sulfur melting device-107; a medium-temperature autoclave inlet valve-108; a first pressure relief valve-105; an extraction mechanism-11; a first turbidity valve-12; a first thermometer-13; a first pressure gauge-14; a first slag outlet-15; a first slag outlet gate-16; a first filter hole-17; a first filter screen-18; a first liquid level gauge-19; a medium-temperature autoclave outlet-110; a second filter screen-111; a first stirrer-112; a first stirring motor-113; a high-temperature autoclave-2; a second pressure relief valve-21; a second turbidity valve-22; a high-temperature autoclave inlet-23; and a second thermometer-24. Second liquid level gauge -25; Second pressure gauge -26; Second slag outlet -27; Second stirring motor -28; Second slag outlet gate -29; Second filter hole -210; Third filter screen -211; High-temperature kettle liquid outlet -212; Fourth filter screen -213; Second stirrer -214; Evaporation kettle -3; Third turbidity valve -31; Evaporation kettle liquid inlet pipe -32; Ring pipe -33; Spray hole -34; Gas outlet -35; Third stirrer -36; Third stirring motor -37; Brush -38; Connector -39; Third slag outlet -310; Third slag outlet gate -311; Third filter hole -312; Fifth filter screen -313; Third thermometer -314; Third liquid level gauge -315; Third pressure gauge -316; Condensation kettle -4; Middle sealing plate - 40; Condensing vessel air inlet - 41; Condensing vessel liquid outlet - 42; Condensing vessel body - 43; Condensing vessel cover - 44; Condensing vessel bottom - 45; Condensing vessel exhaust vent - 46; Top sealing plate - 47; Bottom sealing plate - 48; Lower through hole - 49; Upper through hole - 410; Heat exchange tube - 411; Lower connecting hole - 4122; Lower connecting hole - 4122; Bend - 413; Condensing vessel oil tank - 414; Low-temperature oil outlet - 415; Low-temperature oil inlet - 416; First oil pipe - 418; Second oil pipe - 417; First low-temperature oil pump - 419; Cooling tank - 5; Cooling tank liquid inlet - 51; Cooling tank liquid outlet - 52; Fourth thermometer - 53; Fourth level gauge - 54; Fifth pressure gauge - 73; -55; Cooling tank oil tank -56; First column; First cooling oil coil; Third oil pipe; Fourth oil pipe; Second cryogenic oil pump; Fourth slag outlet; Fourth slag door; Slicer; 6; Frame; Slicing chamber; Slicer inlet pipe; Conveyor belt outlet; 63; Drum; 64; Conveyor belt; 65; Water pipe; 66; Water tank; 67; Water pump; Rubber sheet; 69; Sulfur spray nozzle; 610; Scraper; 611; Exhaust fan; 612; Bearing; 613; Shaft; 614; Blind hole; 615; Liquid passage hole; 616; Mechanical seal rotary joint; 617; Water inlet; 618; Cavity; 619; Drum drive motor; 620; Drive wheel; 621;Chain-622; Waste sulfur tank-7; Fifth thermometer-70; Waste sulfur tank inlet-71; Fifth level gauge-72; Fifth pressure gauge-73; Waste material tank oil tank-74; Third column-75; Second cooling oil coil-76; Fifth oil pipe-77; Sixth oil pipe-78; Third cryogenic oil pump-79; Waste material tank outlet-710; Fifth slag discharge door-711; Fifth slag discharge door drive cylinder-712; Waste material tank support-713; Settling tank-714; Fifth column-715; Bypass pipe-8; Bypass valve-80; Tail Gas absorption tower - 81; Tail gas pipe - 82; Nitrogen pipe - 83; Nitrogen source - 84; Tail gas pump - 85; Nitrogen pump - 86; First pipeline - 87; First pipeline - 87; Second pipeline - 88; Third pipeline - 89; Fourth pipeline - 810; Fifth pipeline - 811; First connecting pipe - 812; Second connecting pipe - 813; Third connecting pipe - 814; Fourth connecting pipe - 815; Hot air furnace - 9; Evaporator coil - 91; High-temperature reactor coil - 92; Medium-temperature reactor coil - 93; Waste sulfur tank tray - 94; Air pump - 95; Air duct - 96. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0023] Example 1. As... Figure 1-27 As shown, an apparatus for continuously preparing sulfur flakes using waste sulfur solution is characterized by comprising a waste sulfur tank 7 and, in sequence, a medium-temperature reactor 1, a high-temperature reactor 2, an evaporation reactor 3, a condensation reactor 4, a cooling tank 5, and a slicing machine 6. Figure 3 As shown, the top of the medium-temperature reactor 1 is equipped with an extraction mechanism 11 and a first pressure relief valve 105. The extraction mechanism is equipped with a lifting suction tube 101 that can extend into the medium-temperature reactor 1 and is equipped with a viscosity measuring instrument 102.

[0024] like Figure 5 As shown, a second pressure relief valve 21 is provided at the top of the high-temperature reactor 2. Figure 4 As shown, the first turbidity valve 12 at the bottom of the intermediate-temperature reactor. Figure 6 As shown, the second turbidity valve 22 is located at the bottom of the high-temperature reactor 2. Figure 18 As shown, the third turbidity valve 31 is located at the bottom of the evaporator 3.

[0025] The extraction mechanism 11, the first pressure relief valve 105, the second pressure relief valve 21, the first turbidity valve 12 at the bottom of the medium-temperature reactor 2, the second turbidity valve 22 at the bottom of the high-temperature reactor 2, and the third turbidity valve 31 at the bottom of the evaporation reactor 3 are respectively connected to the waste sulfur tank inlet 71 via pipelines. Figure 2 As shown, the middle part of the medium-temperature reactor 1 is connected to the middle part of the high-temperature reactor 2 through a bypass pipe 8 equipped with a bypass valve 80.

[0026] The bottom of high temperature reactor 2 and Figure 15 32. Evaporator inlet pipe at the top of the evaporator Figure 17 A series of annular pipes 33 are coaxially arranged inside the evaporator. Several nozzles 34 are provided on the radially outer side of the annular pipes to spray sulfur liquid onto the inner side of the evaporator.

[0027] like Figure 15 As shown, the top of the evaporator 3 is provided with an air outlet 35, and the air outlet 35 is connected to... Figure 7 The air inlet 41 of the intermediate condenser is connected. Figure 7 The liquid outlet 42 of the intermediate condenser and Figure 19 The liquid inlet 51 of the cooling tank is connected.

[0028] like Figure 7 As shown, the condenser 4 is equipped with a pressure relief valve 400, which is connected to the pressure relief pipe 401. Figure 2 The exhaust gas absorption tower 81 is connected in the middle. Figure 20 The outlet of the cooling tank 52 and Figure 21 The liquid inlet pipe 62 of the slicer is connected.

[0029] The medium-temperature reactor, high-temperature reactor, and cooling tank are connected to the tail gas absorption tower 81 via tail gas pipe 82 and to the nitrogen source 84 via nitrogen pipe 83. Each tail gas pipe is equipped with a tail gas pump 85, and each nitrogen pipe is equipped with a nitrogen pump 86. The hot air furnace 9 is connected in series with the evaporator coil 91, the high-temperature reactor coil 92, the medium-temperature reactor coil 93, and the waste sulfur tank coil 94 via air duct 96. The condenser, waste sulfur tank, and cooling tank are all equipped with oil cooling devices. Specifically, as shown... Figure 2 As shown, the medium-temperature reactor and the high-temperature reactor are connected to the tail gas absorption tower 81 via tail gas pipe 82 and to the nitrogen source 84 via nitrogen pipe 83; each tail gas pipe is equipped with a tail gas pump 85, and each nitrogen pipe is equipped with a nitrogen pump 86. Figure 14 As shown, the cooling tank is connected to the tail gas absorption tower 81 via the tail gas pipe 82. An evaporation tank coil 91 is installed on the outer surface of the evaporation kettle; a high-temperature kettle coil 92 is installed on the outer surface of the high-temperature kettle; a medium-temperature kettle coil 93 is installed on the outer surface of the medium-temperature kettle; a waste sulfur tank pan 94 is installed inside the waste sulfur tank; and air pumps 95 are installed on each air duct 96. Specifically... Figure 1 Hot blast furnace 9 and Figure 18 91, the evaporator coil in the middle Figure 6 High-temperature autoclave coil 92, Figure 4 Medium-temperature autoclave coil 93 Figure 12 The waste sulfur tank coil 94 is connected in series through the air duct 96.

[0030] like Figure 3 As shown, the top of the intermediate-temperature reactor 1 is equipped with an intermediate-temperature reactor inlet valve 108, and the intermediate-temperature reactor inlet valve 108 and Figure 2 The filter 106 and the waste sulfur melting device 107 are connected in sequence. For example... Figure 3As shown, the suction mechanism 11 includes a lifting drive motor 103, a lead screw pair 104, and a lifting suction tube 101; the lifting drive motor 103 is connected to the lifting suction tube 101 via the lead screw pair 104; the lifting suction tube 101 is connected via... Figure 1 The first pipeline 87 shown is connected to the inlet 71 of the waste sulfur tank; a light liquid pump 871 is installed on the first pipeline 87.

[0031] The second pressure relief valve 21 passes through, as follows: Figure 1 The second pipeline 88 shown is connected to the inlet 71 of the waste sulfur tank; the first turbidity valve 12 is connected via, as shown in the figure Figure 1 The third pipeline 89 shown is connected to the inlet 71 of the waste sulfur tank; the second turbidity valve 22 is connected via, as shown in the figure Figure 1 The fourth pipeline 810 shown is connected to the inlet 71 of the waste sulfur tank; the third turbidity valve 31 is connected to the inlet 71 of the waste sulfur tank via... Figure 1 The fifth pipeline 811 shown is connected to the waste sulfur tank inlet 71. The bottom of the high-temperature reactor 2 and the top of the evaporation reactor 3 are connected via, as shown in the figure... Figure 1 The first connecting pipe 812 shown is connected to the condenser inlet 41 and the outlet 35 at the top of the evaporator 3 via a connection as shown in the figure. Figure 1 The second connecting pipe 813 shown is connected; the liquid outlet 42 of the condenser and the liquid inlet 51 of the cooling tank are connected by a method such as... Figure 1 The third connecting pipe 814 shown is connected; the cooling tank outlet 52 is connected to the slicer inlet pipe 62 via a connection as shown. Figure 14 The fourth connecting pipe shown is 815.

[0032] like Figure 3-4 As shown, the intermediate-temperature reactor 1 is equipped with a first pressure gauge 14, a first level gauge 19, and a first thermometer 13; the bottom of the intermediate-temperature reactor 1 is equipped with a first slag outlet 15, a first slag gate 16 is hinged to the first slag outlet 15, a first filter hole 17 is provided on the first slag gate 16, a first filter screen 18 is provided at the top of the first filter hole 17, and a first turbidity valve 12 is provided at the bottom of the first filter hole 17; the middle of the intermediate-temperature reactor 1 is equipped with an intermediate-temperature reactor liquid outlet 110, and a second filter screen 111 is provided on the inner side of the intermediate-temperature reactor liquid outlet 110; the intermediate-temperature reactor 1 is equipped with a first stirrer 112, which is connected to a first stirring motor 113 located at the top of the intermediate-temperature reactor 1. Figure 2 As shown, the high-temperature reactor 2 is provided with a high-temperature reactor inlet 23 in the middle, and the medium-temperature reactor outlet 110 is connected to the high-temperature reactor inlet 23 through a bypass pipe 8.

[0033] The first stirrer 112 can stir the medium-temperature vessel 1 to accelerate the uniform heating of the liquid; the top of the first filter hole 17 is provided with a first filter screen 18, and the inner side of the liquid outlet hole 110 of the medium-temperature vessel is provided with a second filter screen 111, which can play a filtering role.

[0034] The overflow connecting pipe is parallel to the ground; the diameter of the overflow connecting pipe is not less than one-fifteenth of the height of the high-temperature reactor 2.

[0035] like Figure 5-6 As shown, the high-temperature reactor 2 is equipped with a second thermometer 24, a second level gauge 25, and a second pressure gauge 26. The bottom of the high-temperature reactor 2 has a second slag outlet 27, connected to a second slag gate 29. The second slag gate 29 has a second filter hole 210, a third filter screen 211 at the top of the second filter hole 210, and a second turbidity valve 22 at the bottom of the second filter hole 210. Above the second slag outlet 27, the high-temperature reactor 2 has a high-temperature reactor liquid outlet 212, with a fourth filter screen 213 on it. The high-temperature reactor 2 is equipped with a second stirrer 214, which is connected to a second stirring motor 28 located at the top of the high-temperature reactor 2. With this technical solution, the third filter screen 211 at the top of the second filter hole 210 can further filter the molten liquid; the second stirrer 214 can stir the medium-temperature reactor and the high-temperature reactor 2, accelerating the uniform heating of the liquid.

[0036] like Figure 15-18 As shown, the evaporator 3 is equipped with a third stirrer 36, which is connected to a third stirring motor 37 located at the top of the evaporator 3. The outer side of the third stirrer 36 is provided with several brushes 38, each of which contacts the radial inner surface of the high-temperature vessel 2. The ring pipe 33 is fixed to the inner side of the evaporator 3 through several connectors 39. There is a downward angle of 15-45° between the central axis of the spray hole 34 and the tangent at the midpoint of the outer side of the spray hole 34 of the ring pipe 33. The bottom of the evaporator 3 is provided with a third slag outlet 310, which is connected to a third slag gate 311. The third slag gate 311 is provided with a third filter hole 312, the top of the third filter hole 312 is provided with a fifth filter screen 313, and the bottom of the third filter hole 312 is provided with a third turbidity valve 31. The top of the evaporator 3 is provided with a third thermometer 314, a third level gauge 315, and a third pressure gauge 316. The fifth filter screen 313 serves a filtering function. The waste liquid accumulated at the bottom of the evaporator 3 mainly consists of sulfates, heavy metals, and low-boiling-point components, such as carbon disulfide, hydrogen sulfide, light hydrocarbons, and heavy tar. Using this technical solution, the tangents at the midpoint of the outer surface of the nozzle 34 have a downward angle of 15-45°, causing the waste sulfur liquid to form a spiral descending liquid film along the inner wall of the evaporator 3. This reduces liquid flow impact and disturbance and enhances the stability of the liquid film, ensuring the waste sulfur liquid jet is aligned with the inner wall of the evaporator 3 and forms a spiral descending liquid film, thereby extending the residence time of the waste sulfur liquid on the inner wall of the evaporator 3 and enhancing the heat exchange effect. Simultaneously, the stirrer agitates the liquid, causing the brush 16 to move synchronously along the inner wall of the vessel 1, scraping off adhering impurities, preventing coking, and ensuring that the sulfur in the liquid is uniformly heated and completely vaporized. The liquid film slowly descends under the combined action of gravity and spiral flow, undergoes a full evaporation stage, and the sulfur components are converted into vapor and escape. Non-volatile impurities gradually concentrate and slide to the bottom of the evaporator 3 and are discharged from the third slag outlet 311.

[0037] like Figure 7-9 As shown, the condenser 4 includes a condenser body 43 that is cylindrical and vertically arranged; the top of the condenser body 43 is connected to a condenser cover 44, and the bottom of the condenser body 43 is connected to a condenser bottom 45; the condenser cover 44 is provided with a condenser tail gas hole 46 connected to the tail gas pipe 82; the bottom of the side wall of the condenser body 43 is provided with a condenser liquid outlet 42, and the middle of the side wall of the condenser body 43 is provided with a condenser air inlet 41; the top of the inner hole of the condenser body 43 is provided with a top sealing plate 47, and the bottom of the inner hole of the condenser body 43 is provided with a bottom sealing plate 48; a middle sealing plate 40 is provided above the condenser liquid outlet 42 in the inner hole of the condenser body 43; the bottom sealing plate 48 is provided with several lower through holes 49 vertically, and the middle sealing plate 40 is provided with a... The lower through-hole 49 has the same diameter as the lower through-hole 49. Each lower through-hole 49 is connected to the upper through-hole 410 above and below it through a heat exchange tube 411. Several lower connecting holes 4122 are arranged in a ring on the side wall of the condenser body 43. Each lower connecting hole 4122 is located between the bottom sealing plate 48 and the air inlet 41 of the condenser. Each lower connecting hole 4122 and the upper connecting hole 4121 above it are provided on the condenser cover 44. Each lower connecting hole 4122 and the upper connecting hole 4121 above it are connected by a bent pipe 413. A low-temperature oil outlet 415 is provided on the bottom 45 of the condenser. A low-temperature oil inlet 416 is provided between the middle sealing plate 40 and the top sealing plate 47 of the condenser body 43. A pressure relief valve 400 is provided on the side wall of the condenser body 43.

[0038] In this technical solution, a heat exchange space is formed between the bottom sealing plate 48, the middle sealing plate 40, and the condenser body 43, while a tail gas collection space is formed between the condenser cover 44 and the top sealing plate 47. As the waste sulfur vapor moves upward through the heat exchange space, the gaseous sulfur in the waste sulfur vapor continuously exchanges heat with the heat exchange tubes 411, forming liquid sulfur that falls to the bottom of the heat exchange space to form pure liquid sulfur, which finally flows out from the condenser outlet 42. The heat exchange space is connected to the tail gas collection space via a bend 413. The light tar components contained in the waste sulfur vapor accumulate in the tail gas collection space and finally enter the tail gas treatment tower 81 through the first pipeline. Through multi-stage sealing plate separation and the coordinated operation of the heat exchange tube array 411, directional condensation of sulfur vapor and separation of light tar components are achieved. The tail gas collection space formed between the condenser cover 44 and the top sealing plate 47 is large, facilitating tail gas discharge. If combustible tar gas accumulates in the heat exchange space, causing a gas explosion and exceeding the set pressure, the pressure relief valve 400 opens, and the overpressure steam is directly discharged into the tail gas treatment tower 81, ensuring the safety of the sulfur steam condenser 4. The oil cooling device of the condenser 4 includes a condenser oil tank 414 equipped with a heat dissipation device. A low-temperature oil inlet 416 is connected to the condenser oil tank 414 via a second oil pipe 417, and a low-temperature oil outlet 415 is connected to the condenser oil tank 414 via a first oil pipe 418. A first low-temperature oil pump 419 is installed on the second oil pipe 417. In another example, a first low-temperature oil pump 419 is installed on the first oil pipe 418. The oil temperature in the condenser oil tank 414 is controlled at 125-140℃, preventing the generated liquid sulfur from precipitating solid sulfur and clogging the pipes due to a sudden drop in temperature, while ensuring good fluidity of the liquid sulfur. A tail gas collection space is formed between the condenser lid 44 and the top sealing plate 47. A tail gas collection space pressure sensor is installed on the condenser lid 44. The distance between the top middle sealing plate 40 and the top sealing plate 47 is less than one-tenth of the distance between the middle sealing plate 40 and the bottom sealing plate 48. Heat exchange tubes 411 are arranged in parallel within the heat exchange space formed between the bottom sealing plate 48 and the middle sealing plate 40. The heat exchange tubes 411 are spirally distributed, with the axial direction of the spiral perpendicular to the center. Each heat exchange tube 411 has several heat dissipation fins on its outer surface. This technical solution significantly improves the heat transfer coefficient at the gas-liquid phase change interface, while suppressing the laminar flow development of sulfur vapor along the axial direction of the vessel, making the phase change condensation process more uniformly distributed throughout the entire height direction of the heat exchange space.

[0039] like Figure 14 , 19As shown in Figure -20, the cooling tank 5 is equipped with a fourth thermometer 53, a fourth level gauge 54, and a fourth pressure gauge 55; the oil cooling device of the cooling tank 5 includes a cooling tank oil tank 56 equipped with a heat dissipation device, and a plurality of first columns 57 are connected to the inner side wall of the cooling tank 5, arranged vertically to each first column 57 and arranged in a ring array along the central axis of the cooling tank 5, and each first column 57 is connected to a first cooling oil coil 58; the first cooling oil coil 58 passes through the side wall of the cooling tank 5, and the first cooling oil... The oil inlet of the coil is connected to the cooling tank oil tank 56 via the third oil pipe 59, and the oil outlet of the first cooling oil coil is connected to the cooling tank oil tank 56 via the fourth oil pipe 510. A second low-temperature oil pump 511 is provided on the third oil pipe 59 or the fourth oil pipe 510. The top of the cooling tank 5 is provided with a cooling tank inlet 51 and the bottom is provided with a cooling tank outlet 52. The bottom of the cooling tank 5 is provided with a fourth slag outlet 512, and a fourth slag gate 513 is connected to the fourth slag outlet 512.

[0040] like Figure 14 , 21 As shown in Figure -24, the slicer 6 is located inside the slicing chamber 61; the slicer 6 is equipped with a water cooling device; the bottom end of the sulfur slicing chamber 61 is laterally provided with a conveyor belt outlet 63; the slicer 6 includes a roller 64; a frame 60 is installed inside the sulfur slicing chamber 61; a conveyor belt 65 is horizontally installed on the frame 60; one end of the conveyor belt 65 passes through the conveyor belt outlet 63; the roller 64 and a roller drive device are longitudinally installed above the conveyor belt 65 on the frame 60; the roller 64 is provided with an inner cavity 65 for holding cooling water; the inner cavity 65 is connected to a water tank 67 through two water pipes 66; one of the water pipes 66 is equipped with a water pump 68; a rubber hose is longitudinally hinged at the top end of the conveyor belt outlet 63. The lower edge of the rubber sheet 69 is located outside the sulfur slicing chamber 61 and is in close contact with the surface of the conveyor belt 65. A sulfur liquid nozzle 610 is installed on the upper right side of the roller 64 inside the sulfur slicing chamber 61, close to the roller 64. The sulfur liquid nozzle 610 is connected to the slicer inlet pipe 62. A non-metallic scraper 611 is located on the lower left side of the sulfur liquid nozzle 610 and is connected to the sulfur slicing chamber 61. The scraper 611 contacts the radial outer circumferential surface of the roller 64 and is located on the upper right side of the roller 64's central axis and above the conveyor belt 65. An exhaust fan 612 is installed in the sulfur slicing chamber 61, and the exhaust fan 612 is connected to the exhaust gas absorption tower 81 via an exhaust pipe 82. In another example, the scraper 611 is connected to the frame 60.

[0041] When the waste sulfur solution is sprayed from the sulfur spray nozzle 610, it comes into contact with the surrounding air, and the vapors volatilized from the sulfur liquid mix with the air to a certain proportion. The presence of a non-metallic scraper 611 and the timely removal of volatilized vapors prevents flashover caused by sparks from friction between the metal scraper and the roller 64. The non-metallic scraper and exhaust fan effectively prevent this problem. The water-cooling device effectively cools the roller 64, causing the sulfur liquid sprayed onto its surface to cool and form a solid sulfur layer. This solid sulfur layer is then scraped off by the scraper to form sulfur flakes, which fall onto the conveyor belt 65 and are output from the conveyor belt outlet 63. The sulfur liquid sprayed from the sulfur spray nozzle 610 allows for the coordinated adjustment of the sulfur film thickness and peel strength on the roller surface by considering the spraying speed, the roller rotation speed, and the cooling temperature gradient. This provides advantages such as continuous operation, uniform cooling, and adjustable production speed. A blower extracts sulfur-containing dust and volatile impurities generated in the sulfur slicing chamber, and transports them through an exhaust pipe to an absorption tower for purification. This prevents sulfur dust and impurities from escaping and polluting the environment, and protects the health of operators. This device, which safely utilizes waste sulfur liquid to produce solid sulfur flakes, has a compact and rational design. All components work collaboratively, achieving efficient sulfur flake production. Furthermore, it effectively controls the leakage of sulfur dust during production, demonstrating excellent environmental performance and production efficiency.

[0042] like Figure 24-27 As shown, the frame 60 has bearings 613 at both the front and rear ends above the conveyor belt 65. The two bearings 613 are connected to a longitudinally arranged rotating shaft 614, which is connected to a roller 64. The central axis of the roller 64 and the central axis of the rotating shaft 614 are on the same straight line. Blind holes 615 are provided at both the front and rear ends of the rotating shaft 614. Each blind hole 615 has a liquid passage hole 616 for communicating with the inner cavity 641 of the roller 64. A mechanically sealed rotary joint 617 is connected to the end of each blind hole 615 away from the other blind hole 615. The mechanically sealed rotary joint 617 has a water inlet hole 618 and a cavity 619 communicating with the water inlet hole 618. The water inlet hole 618 of each mechanically sealed rotary joint 617... 18 are connected to the water tank 67 via a water pipe 66; the cavity 619 of each mechanical seal rotary joint 617 is connected to the nearest blind hole 615 on the rotating shaft 614; each mechanical seal rotary joint 617 is connected to the nearest bearing 613; cooling water enters the inner cavity 641 of the drum 64 through a mechanical seal rotary joint 617 and the nearest blind hole 615 on the rotating shaft 614, and then flows into the water tank 67 from another blind hole 615 on the rotating shaft 614 and the mechanical seal rotary joint 617 closest to the blind hole 615; the drum drive device includes a drum drive motor 620 mounted on the frame 60; a drive wheel 621 is coaxially mounted on the rotating shaft 614, and the drive wheel 621 is connected to... Figure 21The roller drive motor 620 shown is connected via chain 622.

[0043] like Figure 10-13 As shown, the waste tank 7 is equipped with a fifth thermometer 70, a fifth level gauge 72, and a fifth pressure gauge 73; the oil cooling device of the waste tank includes a waste tank oil tank 74, and several third columns 75 are connected to the inner side wall of the waste tank 7, arranged vertically to each third column 75 and arranged in a ring array along the central axis of the cooling tank 5, each third column 75 being connected to a second cooling oil coil 76; the second cooling oil coil 76 passes through the side wall of the waste tank, the oil inlet end of the second cooling oil coil 76 is connected to the waste tank oil tank 74 through a fifth oil pipe 77, and the oil outlet end of the second cooling oil coil 76 is connected to the waste tank oil tank 74 through a sixth oil pipe 78, and the fifth oil pipe 77 is equipped with A third cryogenic oil pump 79 is provided; a waste sulfur tank inlet 71 is provided at the top of the waste tank and a waste tank outlet 710 is provided at the bottom; a fifth slag discharge gate 711 is hinged to the waste tank outlet 710; the fifth slag discharge gate 711 is connected to a fifth slag discharge gate drive cylinder 712, and the fifth slag discharge gate drive cylinder 712 is connected to a waste tank support 713; a sedimentation tank 714 is provided below the fifth slag discharge gate 711, and the sedimentation tank 714 is filled with water; several fifth columns 715 are connected to the inner side wall of the waste tank, which are arranged vertically to each fifth column 715 and arranged in a ring along the central axis of the cooling tank 5, and each fifth column 715 is connected to a waste sulfur tank plate 94 that passes through the side wall of the waste tank. A second cooling oil coil 76 is connected to each fifth column 715.

[0044] The operating method of the apparatus for continuously preparing sulfur flakes using waste sulfur solution is characterized by comprising the following steps: Step 1: The molten waste sulfur is introduced into the medium-temperature reactor 1 and heated to 200-300 degrees Celsius. The volatilized tar-like impurities are introduced into the tail gas absorption tower 81. The retractable suction pipe 101 of the suction mechanism is activated and lowered to below the liquid surface in the medium-temperature reactor 1. The viscosity of the molten sulfur liquid is monitored in real time by the viscosity meter 102. When the viscosity reaches the set threshold, the retractable suction pipe 101 stops descending and the liquid above the end of the retractable suction pipe 101 is removed. The liquid in the medium-temperature reactor 1 flows into the high-temperature reactor 2 through the bypass pipe 8. The turbid liquid at the bottom of the medium-temperature reactor 1 is discharged into the waste sulfur tank 7 through the first turbidity valve 12. Step 2: Heat the waste sulfur melt to 300-400 degrees Celsius in the high-temperature reactor 2, introduce the volatile tar-like impurities into the tail gas absorption tower 81, and introduce the liquid into the evaporation reactor 3; the turbid liquid at the bottom of the high-temperature reactor 2 is discharged into the waste sulfur tank 7 through the second turbidity valve 22; Step 3: In the evaporation reactor 3, spray the liquid into the inner side of the evaporation reactor through the spray hole 34 of the ring pipe 33, control the temperature of the upper layer of the evaporation reactor to 550-600 degrees Celsius and the temperature of the lower layer to 450-480 degrees Celsius, so that the sulfur in the liquid evaporates into sulfur vapor, which is input into the condensation reactor 4, and the residual liquid impurities are discharged into the waste sulfur tank 7 through the third turbidity valve 31; Step 4: In the condensation reactor 4, the sulfur vapor is condensed into liquid sulfur and enters the cooling tank 5, where the liquid sulfur is cooled to 130-135 degrees Celsius; Step 5: In the slicer 6, the liquid sulfur is condensed into a solid and sliced ​​for output.

[0045] In the intermediate-temperature reactor 1 and the high-temperature reactor 2, volatile impurities such as tar and non-volatile impurities such as sulfates and heavy metals are separated twice. In particular, in the intermediate-temperature reactor 1, the retractable suction pipe 131 removes some low-boiling-point components that have not yet volatilized, such as carbon disulfide, hydrogen sulfide, light hydrocarbons, and heavy tar, after they are simultaneously precipitated. The impurities are treated thoroughly. In the evaporation reactor, sulfur is evaporated to separate it from the impurities again. Then, the sulfur is sliced ​​and output. The process features continuous operation and thorough impurity separation. Through multi-stage separation and continuous design, the resource utilization rate of waste sulfur is significantly improved. The purity of the sulfur flakes exceeds 99.5%, and the production capacity is more than three times that of the traditional batch process. Before slicing the liquid sulfur, the liquid sulfur is cooled to 130-135℃ to avoid the small amount of high-temperature gas released from the liquid in the condenser 4 due to continuous production, thus preventing it from flash-igniting when it encounters air in the sulfur slicing chamber. A hot air furnace supplies 600°C high-temperature hot air, which enters the upper end of the evaporator coil 91 and flows out from the lower end, controlling the temperature inside the evaporator. The upper layer temperature is maintained at 550-600°C, and the lower layer temperature at 450-480°C. The hot air flowing out from the lower end of the evaporator coil 91 then enters the high-temperature reactor coil 92, heating the molten waste sulfur to 300-400°C in the high-temperature reactor 2. The hot air flowing out from the high-temperature reactor coil 92 enters the medium-temperature reactor coil 93, heating the molten waste sulfur to 200-300°C in the medium-temperature reactor 1. The hot air flowing from the medium-temperature reactor coil 93 enters the waste sulfur tank coil 94 to maintain the temperature of the slag liquid in the waste sulfur tank. When the slag liquid in the waste sulfur tank accumulates to a certain amount, the temperature of the slag liquid is reduced to 120-125°C through the oil cooling device of the waste sulfur tank before discharge to prevent flash combustion during discharge. In this way, hot air can be fully utilized. Compared with existing technologies that use hot air to heat heat transfer oil and then use the heat transfer oil to heat various production devices, energy consumption is reduced by about 40%, effectively improving energy utilization efficiency. Simultaneously, the device ensures that each reaction stage is carried out under optimal conditions through precise temperature control, thereby improving the evaporation efficiency and condensation quality of sulfur, further enhancing the purity and yield of sulfur flakes. Furthermore, liquid sulfur is cooled to 130-135℃ in the cooling tank 5 before slicing. The medium-temperature reactor, high-temperature reactor, and cooling tank are connected to the nitrogen source 84 via nitrogen pipes 83 to prevent flashover at each stage, ensuring production safety. During condensation, waste sulfur vapor mixed with high-temperature combustible tar gas suddenly enters the condenser. Since the condenser cannot be protected with nitrogen, a gas explosion could occur if high-temperature combustible tar gas suddenly floods in and air is present in the condensation vessel. The present invention provides a pressure relief valve 400 on the condenser 4, which is connected to the tail gas absorption tower 81 through a pressure relief pipe 401. This solves the problem of sudden entry of waste sulfur vapor mixed with high-temperature combustible tar gas into the condenser when the condenser cannot be protected by nitrogen, and the occurrence of gas explosion due to sudden influx of high-temperature combustible tar gas and air in the condenser. The first pressure relief valve and the second pressure relief valve can relieve pressure under high pressure in the vessel, making it safer to use.The entire device has a compact structure and a reasonable layout, with close connections between all components, ensuring continuous and stable operation throughout the entire process and reducing failure rate and maintenance costs.

Claims

1. An apparatus for continuously preparing sulfur flakes using waste sulfur solution, characterized in that: The system includes a waste sulfur tank and sequentially connected intermediate-temperature reactor, high-temperature reactor, evaporation reactor, condensation reactor, cooling tank, and slicer. The intermediate-temperature reactor has an extraction mechanism and a first pressure relief valve at its top. The extraction mechanism has a lifting suction pipe equipped with a viscosity meter that can extend into the intermediate-temperature reactor. The high-temperature reactor has a second pressure relief valve at its top. The extraction mechanism, the first pressure relief valve, the second pressure relief valve, the first turbidity valve at the bottom of the intermediate-temperature reactor, the second turbidity valve at the bottom of the high-temperature reactor, and the third turbidity valve at the bottom of the evaporation reactor are connected to the waste sulfur tank inlet via pipelines. The middle of the intermediate-temperature reactor and the middle of the high-temperature reactor are connected via a bypass pipe equipped with a bypass valve. The bottom of the high-temperature reactor is connected in series with the evaporation reactor inlet pipe at the top of the evaporation reactor and a coaxially arranged annular pipe inside the evaporation reactor. The diameter of the annular pipe is... Several spray holes are provided on the outer side of the evaporator to spray sulfur liquid onto the inner side of the evaporator; the top of the evaporator is provided with an outlet connected to the air inlet of the condenser; the liquid outlet of the condenser is connected to the liquid inlet of the cooling tank; the condenser is provided with a pressure relief valve, which is connected to the tail gas absorption tower through a pressure relief pipe; the liquid outlet of the cooling tank is connected to the liquid inlet pipe of the slicer; the medium-temperature evaporator, high-temperature evaporator, and cooling tank are respectively connected to the tail gas absorption tower through tail gas pipes and respectively connected to the nitrogen source through nitrogen pipes, each tail gas pipe is provided with a tail gas pump, and each nitrogen pipe is provided with a nitrogen pump; the hot air furnace is connected in series with the evaporator coil, the high-temperature evaporator coil, the medium-temperature evaporator coil, and the waste sulfur tank coil through air ducts; the condenser, waste sulfur tank, and cooling tank are all provided with oil cooling devices.

2. The apparatus for continuously preparing sulfur flakes using waste sulfur solution as described in claim 1, characterized in that: The top of the intermediate-temperature reactor is equipped with an inlet valve, which is connected in sequence to the filter and the waste sulfur melting device; an evaporation reactor coil is installed on the outer surface of the evaporation reactor; a high-temperature reactor coil is installed on the outer surface of the high-temperature reactor; a intermediate-temperature reactor coil is installed on the outer surface of the intermediate-temperature reactor; a waste sulfur tank pan is installed inside the waste sulfur tank; air pumps are installed on each air duct; the suction mechanism includes a lifting drive motor, a lead screw pair, and a lifting suction pipe; the lifting drive motor is connected to the lifting suction pipe through the lead screw pair; the lifting suction pipe is connected to the waste sulfur tank inlet through the first pipeline; a light liquid pump is installed on the first pipeline; a second discharge... The pressure valve is connected to the inlet of the waste sulfur tank via the second pipeline; the first turbid valve is connected to the inlet of the waste sulfur tank via the third pipeline; the second turbid valve is connected to the inlet of the waste sulfur tank via the fourth pipeline; the third turbid valve is connected to the inlet of the waste sulfur tank via the fifth pipeline; the bottom of the high-temperature kettle and the top of the evaporation kettle are connected by the evaporation kettle inlet pipe via the first connecting pipe; the condensation kettle inlet and the evaporation kettle top outlet are connected by the second connecting pipe; the condensation kettle outlet and the cooling tank inlet are connected by the third connecting pipe; the cooling tank outlet and the slicer inlet pipe are connected by the fourth connecting pipe.

3. The apparatus for continuously preparing sulfur flakes using waste sulfur solution as described in claim 2, characterized in that: The intermediate-temperature reactor is equipped with a first pressure gauge, a first level gauge, and a first thermometer; the bottom of the intermediate-temperature reactor is equipped with a first slag outlet, a first slag gate is hinged to the first slag outlet, the first slag gate is equipped with a first filter hole, the top of the first filter hole is equipped with a first filter screen, and the bottom of the first filter hole is equipped with a first turbidity valve; the middle of the intermediate-temperature reactor is equipped with a liquid outlet, and the inner side of the liquid outlet is equipped with a second filter screen; the intermediate-temperature reactor is equipped with a first stirrer, which is connected to a first stirring motor located at the top of the intermediate-temperature reactor; the middle of the high-temperature reactor is equipped with a liquid inlet, and the liquid outlet of the intermediate-temperature reactor is connected to the liquid inlet of the high-temperature reactor through a bypass pipe.

4. The apparatus for continuously preparing sulfur flakes using waste sulfur solution as described in claim 1, characterized in that: The high-temperature reactor is equipped with a second thermometer, a second level gauge, and a second pressure gauge; a second slag outlet is located at the bottom of the high-temperature reactor, and a second slag gate is connected to the second slag outlet. The second slag gate is equipped with a second filter hole, a third filter screen is located at the top of the second filter hole, and a second turbidity valve is located at the bottom of the second filter hole; a high-temperature reactor liquid outlet is located above the second slag outlet, and a fourth filter screen is located on the high-temperature reactor liquid outlet; a second stirrer is located inside the high-temperature reactor, and the second stirrer is connected to a second stirring motor located at the top of the high-temperature reactor.

5. The apparatus for continuously preparing sulfur flakes using waste sulfur solution as described in claim 1, characterized in that: The evaporator is equipped with a third stirrer, which is connected to a third stirring motor located at the top of the evaporator. Several brushes are provided on the outer side of the third stirrer, and each brush is in contact with the radial inner surface of the high-temperature vessel. The ring pipe is fixed to the inner side of the evaporator through several connectors. There is a downward angle of 15-45° between the central axis of the spray hole and the tangent at the midpoint of the outer side of the spray hole of the ring pipe. The bottom of the evaporator is equipped with a third slag outlet, which is connected to a third slag gate. The third slag gate is equipped with a third filter hole. A fifth filter screen is provided at the top of the third filter hole, and a third turbidity valve is provided at the bottom of the third filter hole. The evaporator is equipped with a third thermometer, a third level gauge, and a third pressure gauge.

6. The apparatus for continuously preparing sulfur flakes using waste sulfur solution as described in claim 1, characterized in that: The condenser includes a cylindrical, vertically arranged condenser body; a condenser cover is connected to the top of the condenser body, and a condenser bottom is connected to the bottom of the condenser body; the condenser cover has a condenser exhaust port connected to an exhaust pipe; a condenser liquid outlet is located at the bottom of the side wall of the condenser body, and a condenser air inlet is located in the middle of the side wall of the condenser body; a top sealing plate is located at the top of the inner bore of the condenser body, and a bottom sealing plate is located at the bottom of the inner bore of the condenser body; a middle sealing plate is located above the condenser liquid outlet in the inner bore of the condenser body; several downward through holes are vertically arranged on the bottom sealing plate, and the middle sealing plate... Below each lower through hole is an upper through hole of the same diameter as the lower through hole. Each lower through hole is connected to the upper through hole above and below it via a heat exchange tube. Several lower connecting holes are arranged in a ring on the side wall of the condenser body. Each lower connecting hole is located between the bottom sealing plate and the air inlet of the condenser body. Above each lower connecting hole on the condenser body cover is an upper connecting hole. Each lower connecting hole and the upper connecting hole above it are connected by a bent pipe. A low-temperature oil outlet is provided on the bottom of the condenser body. A low-temperature oil inlet is provided between the middle sealing plate and the top sealing plate of the condenser body. A pressure relief valve is provided on the side wall of the condenser body.

7. The apparatus for continuously preparing sulfur flakes from waste sulfur solution as described in claim 6, characterized in that: The oil cooling device for the condenser includes a condenser oil tank equipped with a heat dissipation device, a low-temperature oil inlet connected to the condenser oil tank via a second oil pipe, a low-temperature oil outlet connected to the condenser oil tank via a first oil pipe, and a first low-temperature oil pump installed on the second oil pipe or the first oil pipe.

8. The apparatus for continuously preparing sulfur flakes using waste sulfur solution as described in claim 6, characterized in that: A tail gas collection space is formed between the condenser lid and the top sealing plate, and a tail gas collection space pressure sensor is provided on the condenser lid; the distance between the top and middle sealing plates is less than one-tenth of the distance between the middle sealing plate and the bottom sealing plate; the heat exchange tubes are arranged in parallel in the heat exchange space formed between the bottom sealing plate and the middle sealing plate; the heat exchange tubes are distributed in a spiral, and the axial direction of the spiral is perpendicular to the direction of the spiral, and a number of heat dissipation fins are provided on the outer surface of each heat exchange tube.

9. The apparatus for continuously preparing sulfur flakes using waste sulfur solution as described in claim 1, characterized in that: The cooling tank is equipped with a fourth thermometer, a fourth level gauge, and a fourth pressure gauge. The oil cooling device of the cooling tank includes a cooling tank oil tank with a heat dissipation device. Several first columns are connected to the inner side wall of the cooling tank, arranged vertically to each first column and arranged in a ring array along the central axis of the cooling tank. Each first column is connected to a first cooling oil coil. The first cooling oil coil passes through the side wall of the cooling tank. The oil inlet of the first cooling oil coil is connected to the cooling tank oil tank through a third oil pipe, and the oil outlet of the first cooling oil coil is connected to the cooling tank oil tank through a fourth oil pipe. A second low-temperature oil pump is installed on the third or fourth oil pipe. The top of the cooling tank is equipped with a cooling tank inlet, and the bottom is equipped with a cooling tank outlet. The bottom of the cooling tank is equipped with a fourth slag outlet, and a fourth slag gate is connected to the fourth slag outlet.

10. The apparatus for continuously preparing sulfur flakes from waste sulfur solution as described in claim 1, characterized in that: The slicer is located inside the slicing chamber; the slicer is equipped with a water cooling device; the bottom of the sulfur slicing chamber has a horizontally located conveyor belt outlet; the slicer includes a roller; a frame is installed inside the sulfur slicing chamber; a conveyor belt is horizontally installed on the frame; one end of the conveyor belt passes through the conveyor belt outlet; a roller and a roller drive device are longitudinally installed above the conveyor belt on the frame; the roller has an inner cavity for holding cooling water; the inner cavity is connected to a water tank externally through two water pipes, one of which is equipped with a water pump; a rubber sheet is longitudinally hinged at the top of the conveyor belt outlet; the lower edge of the rubber sheet is located outside the sulfur slicing chamber and in close contact with the surface of the conveyor belt; a sulfur liquid nozzle is installed close to the roller on the upper right side of the roller inside the sulfur slicing chamber; the sulfur liquid nozzle is connected to the slicer's liquid inlet pipe; a scraper made of non-metallic material is located on the lower left side of the sulfur liquid nozzle; the scraper is connected to the sulfur slicing chamber or the frame; the scraper is in contact with the radial outer circumferential surface of the roller and is located on the upper right side of the roller's central axis and above the conveyor belt; an exhaust fan is installed in the sulfur slicing chamber; the exhaust fan is connected to a tail gas absorption tower externally through a tail gas pipe.

11. The apparatus for continuously preparing sulfur flakes from waste sulfur solution as described in claim 10, characterized in that: The frame, located above the conveyor belt, has bearings at both its front and rear ends. These bearings are connected to a longitudinally positioned rotating shaft, which is connected to a roller. The central axis of the roller and the central axis of the rotating shaft are aligned. Blind holes are located at both the front and rear ends of the rotating shaft. Each blind hole has a liquid passage for communicating with the inner cavity of the roller. A mechanically sealed rotary joint is connected to the end of each blind hole on the frame furthest from the other. The mechanically sealed rotary joint has a water inlet and a cavity communicating with the water inlet. The water inlet of each mechanically sealed rotary joint is connected to a water... The pipe is connected to the water tank; the cavity of each mechanical seal rotary joint is connected to the nearest blind hole on the shaft; each mechanical seal rotary joint is connected to the nearest bearing; cooling water enters the inner cavity of the drum through a mechanical seal rotary joint and the nearest blind hole on the shaft, and then flows into the water tank from another blind hole on the shaft and the mechanical seal rotary joint closest to the blind hole; the drum drive device includes a drum drive motor mounted on the frame; a drive wheel is coaxially mounted on the shaft, and the drive wheel is connected to the drum drive motor via a chain.

12. The apparatus for continuously preparing sulfur flakes using waste sulfur solution as described in claim 1, characterized in that: The waste tank is equipped with a fifth thermometer, a fifth level gauge, and a fifth pressure gauge. The oil cooling device for the waste tank includes an oil tank. Several third columns are connected to the inner wall of the waste tank, arranged vertically to each third column and arranged in a ring along the central axis of the cooling tank. Each third column is connected to a second cooling oil coil. The second cooling oil coil passes through the side wall of the waste tank. The oil inlet of the second cooling oil coil is connected to the waste tank oil tank via a fifth oil pipe, and the oil outlet of the second cooling oil coil is connected to the waste tank oil tank via a sixth oil pipe. The fifth oil pipe or... The sixth oil pipe is equipped with a third cryogenic oil pump; the top of the waste tank is equipped with a waste sulfur tank inlet and the bottom is equipped with a waste tank outlet; a fifth slag discharge gate is hinged to the waste tank outlet; the fifth slag discharge gate is connected to a fifth slag discharge gate drive cylinder, and the fifth slag discharge gate drive cylinder is connected to the waste tank support; a sedimentation tank is located below the fifth slag discharge gate, and the sedimentation tank is filled with water; several fifth columns are connected to the inner side wall of the waste tank, which are arranged vertically to each fifth column and arranged in a ring along the central axis of the cooling tank, and each fifth column is connected to a waste sulfur tank plate that passes through the side wall of the waste tank.

13. The operating method of the apparatus for continuously preparing sulfur flakes from waste sulfur solution as described in claims 1-12, characterized in that, Includes the following steps: Step 1: The molten waste sulfur is introduced into a medium-temperature reactor and heated to 200-300 degrees Celsius. The volatilized tar-like impurities are introduced into the tail gas absorption tower. The retractable suction pipe of the suction mechanism is activated and lowered below the liquid surface in the medium-temperature reactor. The viscosity of the molten sulfur liquid is monitored in real time using a viscosity meter. When the viscosity reaches a set threshold, the retractable suction pipe stops descending, and the liquid above the end of the retractable suction pipe is removed. The liquid from the medium-temperature reactor flows into the high-temperature reactor through a bypass pipe. The turbid liquid at the bottom of the medium-temperature reactor is discharged into the waste sulfur tank through the first turbidity valve. Step 2: Heat the waste sulfur melt to 300-400 degrees Celsius in a high-temperature reactor, introduce the volatilized tar-like impurity gas into the tail gas absorption tower, and introduce the liquid into the evaporation reactor; the turbid liquid at the bottom of the high-temperature reactor is discharged into the waste sulfur tank through the second turbidity valve. Step 3: In the evaporator, the liquid is sprayed into the inner side of the evaporator through the nozzle of the ring pipe. The temperature inside the evaporator is controlled so that the upper temperature is 550-600℃ and the lower temperature is 450-480℃, so that the sulfur in the liquid evaporates into sulfur vapor and enters the condenser. The residual liquid impurities are discharged into the waste sulfur tank through the third turbidity valve. Step 4: In the condenser, sulfur vapor is condensed into liquid sulfur and enters the cooling tank, where the liquid sulfur is cooled to 130-135℃. Step 5: The liquid sulfur is solidified into a solid in the slicer and then sliced ​​and output.

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