An automated control sulfur melting kettle device and method

Abstract

This invention discloses an automated control device and method for a sulfur melting kettle, comprising a sulfur melting kettle, a sulfur foam control system, a clear liquid control system, a steam control system, a liquid sulfur control system, and a condensate control system, all connected to the kettle. A slag discharge mechanism is installed inside the kettle. The sulfur foam control system, clear liquid control system, steam control system, liquid sulfur control system, condensate control system, and slag discharge mechanism are all connected to a DCS / PLC. The slag discharge mechanism includes a shell rotatably connected to the kettle body at one end, a covering assembly rotatably connected to the other end of the shell, and a balancing assembly disposed within the shell. A slag discharge channel is provided inside the shell. The automated control device and method for a sulfur melting kettle provided by this invention features automated and remote production operation, automatic slag discharge, ensuring continuous production, improving production efficiency, and protecting the safety and health of operators.

Description

Technical Field

[0001] This invention relates to the field of sulfur melting production technology in desulfurization units of coking, synthetic ammonia, natural gas, coal chemical and petrochemical industries, and specifically to an automated control device for sulfur melting. Background Technology

[0002] Traditional sulfur melting operations are primarily manual, involving the delivery of sulfur foam to a melting kettle, typically a jacketed structure. The kettle contains sulfur foam liquid, and steam is circulated through the jacket to heat it. When the temperature reaches 70-90°C, the foam breaks down, separating the sulfur particles from the entrained desulfurization liquid, gas, and impurities. The denser sulfur particles sink and accumulate, gradually melting into liquid sulfur at temperatures above 112°C. Further heating to 120-160°C, within a lower viscosity range, causes the gas and desulfurization liquid, with their lower density, to rise, while the denser liquid sulfur sinks. The sulfur impurities in the foam, with a density between that of the liquid sulfur and the desulfurization liquid, float on top of the liquid sulfur layer. The gas and desulfurization liquid rise to the top of the kettle and enter the internal components, then are drawn out through conduits from the top and pumped back into the desulfurization system for recycling. The liquid sulfur accumulated at the bottom of the kettle flows out through the drain port and solidifies into solid sulfur after natural or mechanical cooling. Impurities generally vary greatly depending on the product and desulfurization process, and are intermittently discharged from the bottom drain as sulfur slag, depending on the situation.

[0003] Sulfur melting kettles are commonly used desulfurization equipment in coal chemical, natural gas chemical, and petrochemical industries. They are key equipment in the sulfur melting process. Currently, these machines are generally small in size, have limited production capacity, and are not suitable for continuous operation. As coal chemical, natural gas chemical, and petrochemical plants become increasingly large-scale, the sulfur foam produced by the desulfurization system is also increasing. The current output of sulfur melting kettles is insufficient to meet the needs of scale expansion, and multiple units are required for operation. Due to the lack of continuous production, the absence of remote monitoring facilities, the inability to assess on-site conditions, and the large number of sulfur melting devices, current operations rely on manual observation and operation of valves and pumps to complete processes such as feeding, liquid discharge, and slag discharge. Furthermore, when sulfur slag needs to be discharged, it must be discharged from the bottom drain port before the sulfur liquid can be discharged again, affecting production efficiency and preventing continuous production. The sulfur foam, discharged clear liquid, liquid sulfur, and sulfur slag contain a certain amount of coal tar and ammonia, inevitably resulting in a strong irritating odor, considerable toxicity, and high temperatures in equipment, pipelines, valves, and materials, posing significant environmental, safety, and occupational health risks. This solution addresses the technical problem of how to automate the control of the sulfur melting kettle. Summary of the Invention

[0004] The purpose of this invention is to provide an automated control device and method for a sulfur melting kettle. By using DCS or PLC to automatically control the sulfur melting kettle, the problems of manual operation, inconvenient slag discharge, and difficulty in continuous operation of existing sulfur melting equipment are solved.

[0005] An automated control device for a sulfur melting kettle includes a sulfur melting kettle, and further includes a sulfur foam control system, a clear liquid control system, a steam control system, a liquid sulfur control system, and a condensate control system, which are respectively connected to the sulfur melting kettle.

[0006] The sulfur melting kettle includes a kettle structural component, a kettle heating kit and a slag discharge mechanism respectively connected to the kettle structural component, and the kettle structural component includes an upper end cap, a kettle body and a lower cone connected in sequence from top to bottom;

[0007] The slag discharge mechanism includes a hollow, sealed elongated shell. One end of the shell is rotatably connected to the vessel body. The slag discharge mechanism also includes a covering component rotatably connected to the other end of the shell and a balancing component horizontally arranged inside the shell. The shell has a slag discharge channel inside. One end of the slag discharge channel is connected to the vessel body through a metal hose, and the other end is in separate contact with the covering component. The end of the metal hose connected to the vessel body is provided with a slag discharge end cap.

[0008] By adjusting the balancing component, the slag discharge mechanism is kept in a horizontal state when it is subjected to buoyancy in the sulfur slag layer;

[0009] The sulfur foam control system, clear liquid control system, steam control system, liquid sulfur control system, condensate control system, and balance component are respectively connected to the DCS / PLC.

[0010] The covering assembly includes a cap, a rod, and a counterweight connected in sequence from top to bottom. The cap is horizontally fitted with a pin that is rotatably connected to the housing. The cap has a cap hole corresponding to the slag discharge channel.

[0011] The upper and lower sides of the housing are respectively provided with an upper limit position and a lower limit position to restrict the rotation of the cap, and the upper limit position and the lower limit position are respectively connected to the DCS / PLC.

[0012] Temperature sensor one and temperature sensor two are respectively provided on the upper and lower sides of the housing, and temperature sensor one and temperature sensor two are respectively connected to DCS / PLC.

[0013] The reactor structure includes an upper head, a reactor body, and a lower cone connected sequentially from top to bottom;

[0014] The upper end cap is equipped with a sulfur foam inlet, a clear liquid outlet, a clear liquid thermometer port, and an internal pressure gauge port;

[0015] The vessel heating kit includes an external heating structure consisting of a jacket on the outside of the vessel body and a lower conical sleeve on the outside of the lower conical body, and an internal heating structure disposed inside the vessel body.

[0016] The sulfur foam inlet is connected to the sulfur foam storage tank through the sulfur foam control system, the clear liquid outlet is connected to the clear liquid tank through the clear liquid control system, the clear liquid thermometer port is connected to the clear liquid thermometer on the top of the reactor, and the pressure gauge port inside the reactor is connected to the pressure gauge of the sulfur melting reactor.

[0017] The side of the vessel body is provided with several internal steam ports and several internal thermometer ports. The side of the jacket is provided with jacket steam ports, jacket pressure gauge ports, and jacket thermometer ports. There are no fewer than three internal steam ports and three internal thermometer ports, and they are evenly distributed vertically along the side of the vessel body.

[0018] The inlet end of the steam port inside the vessel and the inlet end of the steam port in the jacket are respectively connected to the steam control system. The outlet end of the steam port inside the vessel is connected to the inlet end of the heating structure inside the vessel. The outlet end of the steam port in the jacket is connected to the jacket. The outlet end of the heating structure inside the vessel is connected to the heating structure outside the vessel.

[0019] The inlet of the thermometer inside the vessel is connected to the thermometer in the sulfur melting vessel, the inlet of the pressure gauge in the jacket is connected to the pressure gauge in the jacket, and the inlet of the thermometer in the jacket is connected to the thermometer in the jacket.

[0020] The sulfur melting kettle thermometer and the jacket thermometer are connected to the steam control system via the DCS / PLC.

[0021] The bottom end of the lower cone is provided with a liquid sulfur outlet, which is connected to a liquid sulfur control system. The liquid sulfur control system is connected to a sulfur treatment device. The bottom end of the lower cone sleeve is provided with a condensate outlet, which is connected to a condensate control system.

[0022] The sulfur foam control system includes a sulfur foam flow meter and a sulfur foam flow system installed from left to right.

[0023] The sulfur foam flow system includes a sulfur foam inlet regulating valve, a sulfur foam manual valve one and a sulfur foam manual valve two installed at both ends of the sulfur foam inlet regulating valve, and a sulfur foam bypass valve connected between the inlet of sulfur foam manual valve one and the outlet of sulfur foam manual valve two.

[0024] The clear liquid control system includes a clear liquid outlet regulating valve, a clear liquid manual valve one and a clear liquid manual valve two installed at both ends of the clear liquid outlet regulating valve, and a clear liquid bypass valve connected between the inlet of clear liquid manual valve one and the outlet of clear liquid manual valve two.

[0025] The steam control system includes a steam monitoring system, a main steam valve, and a steam flow system arranged from left to right;

[0026] The steam monitoring system is connected to the steam source. The steam monitoring system includes a steam flow meter, a steam pressure gauge, and a steam thermometer arranged sequentially from left to right on the steam main. The steam flow system includes a jacketed steam flow system and an in-vessel steam flow system connected in parallel.

[0027] The jacketed steam flow system includes a jacketed steam inlet regulating valve, a jacketed steam manual valve II and a jacketed steam manual valve II installed at both ends of the jacketed steam inlet regulating valve, and a jacketed steam bypass valve connected between the inlet and outlet of the jacketed steam manual valve II.

[0028] The in-vessel steam flow system includes an in-vessel steam inlet regulating valve, an in-vessel steam manual valve one and an in-vessel steam manual valve two installed at both ends of the in-vessel steam inlet regulating valve, and an in-vessel steam bypass valve connected between the inlet of the in-vessel steam manual valve one and the outlet of the in-vessel steam manual valve two.

[0029] The liquid sulfur control system includes, from top to bottom, a liquid sulfur flow system, a liquid sulfur hydrophobic system, and a liquid sulfur outlet temperature meter.

[0030] The liquid sulfur flow system includes a liquid sulfur outlet regulating valve, a liquid sulfur manual valve one and a liquid sulfur manual valve two installed at both ends of the liquid sulfur outlet regulating valve, and a liquid sulfur bypass valve connected between the inlet of liquid sulfur manual valve one and the outlet of liquid sulfur manual valve two.

[0031] The liquid sulfur drainage system includes a liquid sulfur drainage valve, a drainage manual valve one and a drainage manual valve two installed at both ends of the liquid sulfur drainage valve, and a drainage bypass valve connected between the inlet of the drainage manual valve one and the outlet of the drainage manual valve two.

[0032] The condensate control system includes a condensate drain valve, a condensate manual valve one and a condensate manual valve two installed at both ends of the condensate drain valve, and a condensate bypass valve connected between the inlet of the condensate manual valve one and the outlet of the condensate manual valve two.

[0033] An automated control method for a sulfur melting reactor specifically includes the following steps:

[0034] Step S1: Open all manual valves in the system, open the condensate drain valve and the liquid sulfur drain valve, and close all other valves;

[0035] Step S2: Set the temperature values ​​inside the vessel and the jacket temperature values ​​through DCS / PLC, and open the jacket steam inlet regulating valve, the vessel steam inlet regulating valve, and the main steam valve respectively. Introduce steam into the steam control system to raise the temperature. When the temperature of the uppermost sulfur melting vessel reaches 80 degrees, open the sulfur foam inlet regulating valve to introduce sulfur foam. Adjust the clear liquid outlet regulating valve to make the pressure gauge of the sulfur melting vessel 0.5-0.9 MPa. Continue to raise the temperature until the clear liquid temperature gauge at the top of the vessel reaches 70 degrees.

[0036] Step S3: Continue heating. When the temperature displayed on the sulfur melting kettle thermometer is above the kettle temperature, open the bottom liquid sulfur outlet regulating valve to drain the liquid sulfur. Increase the opening of the sulfur foam inlet regulating valve to balance the flow rate in and out of the sulfur melting kettle. Interlock the sulfur melting kettle thermometer with the kettle steam inlet regulating valve and the jacket thermometer with the jacket steam inlet regulating valve. When the sulfur melting kettle thermometer value is lower or higher than the kettle temperature, increase or decrease the opening of the kettle steam inlet regulating valve. When the jacket thermometer value is lower or higher than the jacket temperature, increase or decrease the opening of the jacket steam inlet regulating valve to achieve automatic control.

[0037] Step S4: The liquid sulfur layer gradually rises above the slag discharge mechanism. The slag discharge mechanism drives the cap to move upward. The cap is rotated clockwise along the slag discharge channel by the lever action of the counterweight, so that the cap contacts the lower limit and covers the slag discharge channel. The slag discharge mechanism does not discharge slag.

[0038] Step S5: As the reaction proceeds, sulfur slag accumulates on the liquid sulfur layer to form a sulfur slag layer. When the cap is between the lower and upper limits, and the temperature measured by temperature sensor 1 and temperature sensor 2 is greater than the temperature of the clear liquid at the top of the kettle, the slag discharge mechanism enters the sulfur slag layer. The slag discharge mechanism is in a horizontal state, and the cap hole is connected to the slag discharge channel. The sulfur slag passes through the cap hole and is discharged from the sulfur melting kettle through the slag discharge channel.

[0039] Step S6: When the cap touches the upper or lower limit, the sulfur slag is completely discharged;

[0040] Step S7: The condensate control system and the liquid sulfur drainage system discharge system water into the condensate tank through the condensate drain valve and the liquid sulfur drain valve, respectively.

[0041] The present invention achieves the following technical effects:

[0042] (1) Equipped with a DCS or PLC system for remote control, the flow rate of sulfur foam, steam, liquid sulfur and clear liquid are controlled separately. Combined with a special new type of sulfur melting kettle, it can achieve high output, continuous and automated operation, ensuring the safety of operators and reducing the labor intensity of operators.

[0043] (2) The slag discharge mechanism is equipped with a cover component. When the slag discharge mechanism is in the liquid sulfur layer or clear liquid layer, the cover cap of the cover component covers the slag discharge channel to prevent the reaction liquid from flowing out. When the slag discharge mechanism is in the sulfur slag layer, the cover hole of the cover cap is connected to the slag discharge channel to facilitate the discharge of sulfur slag, thus achieving the effect of continuous production and automatic slag discharge.

[0044] (3) The slag discharge mechanism is equipped with a balancing component to adjust the center of gravity of the slag discharge mechanism so as to ensure that it is in a horizontal state in the sulfur slag layer with different compositions, so as to discharge the sulfur slag in time and make it more applicable.

[0045] (4) The slag discharge mechanism is equipped with temperature sensor 1 and temperature sensor 2. By detecting the temperature of the sulfur slag, the discharge status of the sulfur slag and the reaction status inside the sulfur melting kettle are determined, so that the slag discharge is more complete and the sulfur melting reaction is more thorough.

[0046] (5) The sulfur melting kettle is equipped with multiple temperature ports. The position and height of the clear liquid layer, sulfur slag layer and liquid sulfur layer are determined by monitoring multiple thermometers. The flow rate of sulfur foam, clear liquid, liquid sulfur and steam are adjusted in a timely manner to make the operation more convenient.

[0047] (6) It is equipped with an external heating structure and an internal heating structure, and the steam is introduced at multiple points. The amount of steam introduced at different steam inlets can be adjusted to achieve zone control and precise temperature regulation, so that the sulfur foam is preheated, heated, and separated into liquid and solid and liquid and gas processes, making the working process easier to control and operate. Attached Figure Description

[0048] Figure 1 This is a process flow diagram of the automated control device in an embodiment of the present invention.

[0049] Figure 2 This is a schematic diagram of the slag discharge mechanism in an embodiment of the present invention.

[0050] Figure 3 This is a schematic diagram of the internal structure of the slag discharge mechanism in an embodiment of the present invention.

[0051] Figure 4 This is a schematic diagram showing the state of the slag discharge mechanism located in the liquid sulfur layer in an embodiment of the present invention.

[0052] Figure 5 This is a schematic diagram showing the state of the slag discharge mechanism in the clear liquid layer in an embodiment of the present invention.

[0053] Figure 6 This is a schematic diagram of the structure of the masking component in an embodiment of the present invention.

[0054] Figure 7 This is a schematic diagram of the DCS / PLC system in an embodiment of the present invention.

[0055] Figure 8This is a schematic diagram of the sulfur melting kettle in an embodiment of the present invention.

[0056] The attached figures are labeled as follows: 1. Upper head; 2. Vessel body; 3. Jacket; 4. Internal heating structure; 5. Lower cone; 6. Lower cone sleeve; 8. Slag discharge mechanism; 81. Shell; 82. Cover assembly; 85. Hinge seat; 86. Metal hose; 88. Balancing assembly; 881. Stepper motor; 882. Balancing slider; 883. Screw; 811. Slag discharge channel; 821. Cover cap; 822. Rod; 823. Counterweight; 831. Upper limit; 832. Lower limit; 841. Temperature sensor one; 842. Temperature sensor two; 861. Slag discharge end cap; 8211. Cover cap hole; a. Sulfur foam inlet; b. Clear liquid outlet; c. Clear liquid thermometer port; d. Pressure gauge port inside the reactor; e. Steam port inside the reactor; f. Thermometer port inside the reactor; g. Jacket pressure gauge port; h. Condensate outlet; i. Liquid sulfur outlet; j. Jacket steam port; k. Jacket thermometer port; TIA1001. Steam thermometer; TIA1002. Clear liquid thermometer at the top of the reactor; TIA1003. Liquid sulfur outlet thermometer; TICA1001. Sulfur melting reactor thermometer; PIA1001. Steam pressure gauge; PIA1002. Pressure gauge for molten sulfur reactor; PIA1003, jacketed pressure gauge; TICA1002, jacketed thermometer; FE1001, sulfur foam flow meter; FE1002, steam flow meter; PCV1001, sulfur foam inlet regulating valve; PCV10021, jacketed steam inlet regulating valve; PCV10022, in-reactor steam inlet regulating valve; PCV1006, liquid sulfur outlet regulating valve; PCV1007, clear liquid outlet regulating valve; S1001, condensate drain valve; S1002, liquid sulfur drain valve;LSV1001, Sulfur Foam Manual Valve 1; LSV1002, Sulfur Foam Manual Valve 2; LSV1003, Clear Liquid Manual Valve 1; LSV1004, Clear Liquid Manual Valve 2; LSV10051, Jacketed Steam Manual Valve 1; LSV10061, Jacketed Steam Manual Valve 2; LSV10052, Internal Steam Manual Valve 1; LSV10062, Internal Steam Manual Valve 2; LSV1007, Liquid Sulfur Manual Valve 1; LSV1008, Liquid Sulfur Manual Valve 2; LSV1009, Drainage Manual Valve 1; LSV1010, Drainage Manual Valve 2; LSV1011, Condensate Manual Valve 1; LSV1012, Condensate Manual Valve 2; LPV1001, Sulfur foam bypass valve; LPV1002, Clear liquid bypass valve; LPV10031, Jacketed steam bypass valve; LPV10032, In-reactor steam bypass valve; LPV1004, Liquid sulfur bypass valve; LPV1005, Drainage bypass valve; LPV1006, Condensate bypass valve; LZV1005, Steam main valve; L, Sulfur foam storage tank; L1, Sulfur foam control system; L2, Sulfur foam flow system; Q, Clear liquid tank; Q1, Clear liquid control system; Z, Steam source; Z1, Steam control system; Z2, Jacketed steam flow system; Z3, In-reactor steam flow system; Y, Liquid sulfur control system; Y1, Liquid sulfur flow system; Y2, Liquid sulfur drainage system; Y3, Sulfur treatment equipment; S, Condensate control system; S1, Condensate tank; YL, Liquid sulfur layer; LZ, Sulfur slag layer; QY, Clear liquid layer. Detailed Implementation

[0057] To more clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0058] See Figure 1 An automated control device for a sulfur melting kettle includes a sulfur melting kettle, and further includes a sulfur foam control system L1, a clear liquid control system Q1, a steam control system Z1, a liquid sulfur control system Y, and a condensate control system S, which are respectively connected to the sulfur melting kettle.

[0059] See Figures 2-8 The sulfur melting kettle includes kettle structural components, kettle heating kits connected to the kettle structural components, and slag discharge mechanism 8. The kettle structural components include an upper head 1, a kettle body 2, and a lower cone 5 connected from top to bottom.

[0060] The slag discharge mechanism 8 includes a hollow, sealed elongated shell 81, a covering assembly 82 for controlling the discharge of sulfur slag from the sulfur melting kettle, a balancing assembly 88 for adjusting the state of the slag discharge mechanism 8 in the sulfur slag layer LZ, and a metal hose 86 for discharging sulfur slag.

[0061] For sulfur slag with different compositions, the balancing component 88 can adjust the center of gravity of the slag discharge mechanism 8 to ensure that the slag discharge mechanism 8 is always in a horizontal state when in sulfur slag with different compositions, so as to facilitate the discharge of sulfur slag.

[0062] One end of the shell 81 is rotatably connected to the vessel body 2, and the other end of the shell 81 is rotatably connected to the cover assembly 82. The balance assembly 88 is horizontally arranged inside the shell 81. The slag discharge channel 811 passes through the inside of the shell 81. One end of the slag discharge channel 811 is connected to the vessel body 2 through a metal hose 86, and the other end is in separate contact with the cover assembly 82. The end of the metal hose 86 connected to the vessel body 2 is provided with a slag discharge end cap 861.

[0063] The sulfur foam control system L1, the clear liquid control system Q1, the steam control system Z1, the liquid sulfur control system Y, the condensate control system S, and the balance component 88 are respectively connected to the DCS / PLC.

[0064] During sulfur melting in the sulfur melting kettle, the layers from top to bottom are: clear liquid layer QY, sulfur slag layer LZ, and liquid sulfur layer YL. The density of these three layers increases sequentially. Due to the different densities of each layer, the slag discharge mechanism 8 is in different states: when the slag discharge mechanism 8 is subjected to buoyancy in the clear liquid layer QY, the buoyancy is small, and the slag discharge mechanism 8 tilts downward; when the slag discharge mechanism 8 is subjected to buoyancy in the sulfur slag layer LZ, it is in a horizontal state; when the slag discharge mechanism 8 is subjected to buoyancy in the liquid sulfur layer LY, the buoyancy is large, and the slag discharge mechanism 8 tilts upward.

[0065] The balancing assembly 88 includes a stepper motor 881 connected to the housing 81, a screw 883 connected to the motor shaft of the stepper motor 881, and a balancing slider 882 sleeved on the screw. When the stepper motor 881 drives the screw 883 to rotate, the balancing slider 882 slides back and forth along the screw 883, thereby adjusting the position of the balancing slider 882 in the housing 81, thereby changing the tilt angle of the slag discharge mechanism 8.

[0066] The stepper motors 881 of the sulfur foam control system L1, the clear liquid control system Q1, the steam control system Z1, the liquid sulfur control system Y, the condensate control system S, and the balance component 88 are respectively connected to the DCS / PLC.

[0067] The covering assembly 82 includes a cover 821, a rod 822, and a counterweight 823 connected sequentially from top to bottom. The cover 821 is horizontally provided with a pin that is rotatably connected to the housing 81. The shape of the cover 821 is consistent with the end of the housing 81. The cover 821 is provided with a cover hole 8211 corresponding to the slag discharge channel 811.

[0068] The upper and lower sides of the housing 81 are respectively provided with an upper limit position 831 and a lower limit position 832 to limit the rotation of the cap 821. The upper limit position 831 and the lower limit position 832 are respectively connected to the DCS / PLC.

[0069] Temperature sensor 841 and temperature sensor 842 are respectively installed on the upper and lower sides of the housing 81. Temperature sensor 841 and temperature sensor 842 are respectively connected to DCS / PLC.

[0070] The upper end cap 1 is equipped with a sulfur foam inlet (a), a clear liquid outlet (b), a clear liquid thermometer port (c), and an internal pressure gauge port (d).

[0071] The vessel heating kit includes an external heating structure consisting of a jacket 3 on the outside of the vessel body 2 and a lower cone sleeve 6 on the outside of the lower cone 5, and an internal heating structure 4 disposed on the inside of the vessel body 2.

[0072] Sulfur foam inlet a is connected to sulfur foam storage tank L through sulfur foam control system L1, clear liquid outlet b is connected to clear liquid tank Q through clear liquid control system Q1, clear liquid thermometer port c is connected to clear liquid thermometer TIA1002 on the top of the kettle, and pressure gauge port d inside the kettle is connected to pressure gauge PIA1002 in the sulfur melting kettle.

[0073] The side of the vessel body 2 is provided with several steam ports e and several thermometer ports f. The side of the jacket 3 is provided with jacket steam ports j, jacket pressure gauge ports g and jacket thermometer ports k. There are no less than three steam ports e and three thermometer ports f, and they are evenly distributed vertically along the side of the vessel body.

[0074] The inlet end of the steam port e inside the vessel and the inlet end of the steam port j inside the jacket are respectively connected to the steam control system Z1. The outlet end of the steam port e inside the vessel is connected to the inlet end of the heating structure 4 inside the vessel. The outlet end of the steam port j inside the jacket is connected to the jacket 3. The outlet end of the heating structure 4 inside the vessel is connected to the heating structure outside the vessel.

[0075] The inlet f of the inlet thermometer is connected to the TICA1001 thermometer in the sulfur melting vessel, the inlet g of the jacket pressure gauge is connected to the PIA1003 jacket pressure gauge, and the inlet k of the jacket thermometer is connected to the TICA1002 jacket thermometer.

[0076] The TICA1001 thermometer and TICA1002 jacket thermometer of the sulfur melting kettle are connected to the steam control system Z1 via DCS / PLC.

[0077] The bottom end of the lower cone 5 is provided with a liquid sulfur outlet i, which is connected to the liquid sulfur control system Y. The liquid sulfur control system Y is connected to the sulfur treatment equipment Y3. The bottom end of the lower cone sleeve 6 is provided with a condensate outlet h, which is connected to the condensate control system S.

[0078] The sulfur foam control system L1 includes, from left to right, a sulfur foam flow meter FE1001 and a sulfur foam flow system L2;

[0079] The sulfur foam flow system L2 includes a sulfur foam inlet regulating valve PCV1001, a sulfur foam manual valve LSV1001 and a sulfur foam manual valve LSV1002 installed at both ends of the sulfur foam inlet regulating valve PCV1001, and a sulfur foam bypass valve LPV1001 connected between the inlet of the sulfur foam manual valve LSV1001 and the outlet of the sulfur foam manual valve LSV1002.

[0080] The clear liquid control system Q1 includes a clear liquid outlet regulating valve PCV1007, a clear liquid manual valve LSV1003 and a clear liquid manual valve LSV1004 installed at both ends of the clear liquid outlet regulating valve PCV1007, and a clear liquid bypass valve LPV1002 connected between the inlet of clear liquid manual valve LSV1003 and the outlet of clear liquid manual valve LSV1004.

[0081] The steam control system Z1 includes, from left to right, a steam monitoring system, a main steam valve LZV1005, and a steam flow system;

[0082] The steam monitoring system is connected to the steam source Z. The steam monitoring system includes a steam flow meter FE1002, a steam pressure gauge PIA1001, and a steam thermometer TIA1001 arranged from left to right on the steam main pipe. The steam flow system includes a jacketed steam flow system Z2 and an in-vessel steam flow system Z3 connected in parallel.

[0083] The jacketed steam flow system Z2 includes a jacketed steam inlet regulating valve PCV10021, a jacketed steam manual valve LSV10051 and a jacketed steam manual valve LSV10061 installed at both ends of the jacketed steam inlet regulating valve PCV10021 respectively, and a jacketed steam bypass valve LPV10031 connected between the inlet of the jacketed steam manual valve LSV10051 and the outlet of the jacketed steam manual valve LSV10061.

[0084] The in-vessel steam flow system Z3 includes an in-vessel steam inlet regulating valve PCV10022, an in-vessel steam manual valve LSV10052 and an in-vessel steam manual valve LSV10062 installed at both ends of the in-vessel steam inlet regulating valve PCV10022 respectively, and an in-vessel steam bypass valve LPV10032 connected between the inlet of the in-vessel steam manual valve LSV10052 and the outlet of the in-vessel steam manual valve LSV10062.

[0085] The liquid sulfur control system Y includes, from top to bottom, a liquid sulfur flow system Y1, a liquid sulfur hydrophobic system Y2, and a liquid sulfur outlet temperature gauge TIA1003;

[0086] The liquid sulfur flow system Y1 includes a liquid sulfur outlet regulating valve PCV1006, a liquid sulfur manual valve LSV1007 and a liquid sulfur manual valve LSV1008 installed at both ends of the liquid sulfur outlet regulating valve PCV1006, and a liquid sulfur bypass valve LPV1004 connected between the inlet of liquid sulfur manual valve LSV1007 and the outlet of liquid sulfur manual valve LSV1008.

[0087] The liquid sulfur drainage system Y2 includes a liquid sulfur drainage valve S1002, a drainage manual valve LSV1009 and a drainage manual valve LSV1010 installed at both ends of the liquid sulfur drainage valve S1002, and a drainage bypass valve LPV1005 connected between the inlet of the drainage manual valve LSV1009 and the outlet of the drainage manual valve LSV1010.

[0088] The condensate control system S includes a condensate drain valve S1001, a condensate manual valve LSV1011 and a condensate manual valve LSV1012 installed at both ends of the condensate drain valve S1001, and a condensate bypass valve LPV1006 connected between the inlet of the condensate manual valve LSV1011 and the outlet of the condensate manual valve LSV1012.

[0089] An automated control method for a sulfur melting reactor specifically includes the following steps:

[0090] Step S1: Open all manual valves in the system, open the condensate drain valve S1001 and the liquid sulfur drain valve S1002, and close all other valves;

[0091] Step S2: Set the internal temperature of the reactor to 130 degrees Celsius and the jacket temperature to 140 degrees Celsius via the DCS / PLC. Open the jacket steam inlet regulating valve PCV10021, the reactor internal steam inlet regulating valve PCV10022, and the main steam valve LZV1005 respectively. Introduce steam into the steam control system Z1 to raise the temperature. When the temperature reaches 80 degrees Celsius on the uppermost sulfur melting reactor thermometer TICA1001, open the sulfur foam inlet regulating valve PCV1001 to introduce sulfur foam. Adjust the clear liquid outlet regulating valve PCV1007 to make the sulfur melting reactor pressure gauge PIA1002 0.5-0.9 MPa. Continue to raise the temperature until the clear liquid temperature gauge TIA1002 at the top of the reactor reaches 70 degrees Celsius.

[0092] Step S3: Continue heating. When the temperature displayed by the bottom sulfur melting kettle thermometer TICA1001 is above 130 degrees Celsius, open the bottom liquid sulfur outlet regulating valve PCV1006 to drain the liquid sulfur. Increase the opening of the sulfur foam inlet regulating valve PCV1001 to balance the flow rate into and out of the sulfur melting kettle. Interlock the sulfur melting kettle thermometer TICA1001 with the kettle steam inlet regulating valve PCV10022, and interlock the jacket thermometer TICA1001 with the jacket steam inlet regulating valve PCV10022. When the value of the bottom sulfur melting kettle thermometer TICA1001 is lower or higher than the kettle temperature of 130 degrees Celsius, the opening of the kettle steam inlet regulating valve PCV10022 will increase or decrease. When the value of the jacket thermometer TICA1001 is lower or higher than the jacket temperature of 140 degrees Celsius, the opening of the jacket steam inlet regulating valve PCV10022 will increase or decrease, thus achieving automatic control.

[0093] Step S4: The liquid sulfur layer YL gradually rises above the slag discharge mechanism 8. Since the density of the liquid sulfur layer YL is greater than that of the sulfur slag layer LZ, the buoyancy of the liquid sulfur on the slag discharge mechanism 8 is also greater than that of the sulfur slag. Therefore, the slag discharge mechanism 8 rotates counterclockwise along the hinge seat 85, causing the cap 821 to move upward. The cap 821 is kept horizontal by the lever action of the counterweight 823 and rotates clockwise relative to the slag discharge channel 811. The lower end of the cap 821 contacts the lower limit 832 and stops rotating. At this time, the cap 821 covers the slag discharge channel 811, and the slag discharge mechanism 8 does not discharge slag.

[0094] Step S5: As the reaction proceeds, a sulfur slag layer LZ formed by sulfur slag accumulates on the liquid sulfur layer YL. The slag discharge mechanism 8 gradually rotates clockwise along the hinge seat 85. When the DCS / PLC measures that the cap 821 is between the lower limit 832 and the upper limit 831, it indicates that the buoyancy of the slag discharge mechanism 8 decreases and it gradually escapes the liquid sulfur layer YL. When the temperature measured by temperature sensor 1 841 and temperature sensor 2 842 is greater than that of the clear liquid temperature gauge TIA1002 at the top of the kettle, it indicates that the slag discharge mechanism 8 is in the sulfur slag layer LZ rather than the clear liquid layer QY. The slag discharge mechanism 8 is in a relatively horizontal state. At this time, the cap hole 8211 is connected to the slag discharge channel 811. The slag discharge end cover 861 is opened, and the sulfur slag passes through the cap hole 8211 and is discharged out of the molten sulfur kettle through the slag discharge channel 811.

[0095] Step S6: Observe the state of the discharged sulfur slag, and combine the temperature display of temperature sensor 1 841 and temperature sensor 2 842 to determine whether the reaction temperature in the sulfur melting kettle is appropriate. If the temperature of temperature sensor 1 841 and temperature sensor 2 842 is too low and there is too much sulfur foam in the sulfur slag, the reaction temperature in the sulfur melting kettle needs to be increased. If the temperature of temperature sensor 1 841 and temperature sensor 2 842 is too high and exceeds the liquid flow temperature, the reaction temperature in the sulfur melting kettle needs to be decreased. When the cap 821 contacts the upper limit position 831 or the lower limit position 832, the sulfur slag is completely discharged, and the slag discharge end cap 861 is closed.

[0096] Step S7: The condensate control system S and the liquid sulfur drainage system Y2 discharge system water into the condensate tank S1 through the condensate drain valve S1001 and the liquid sulfur drain valve S1002, respectively.

[0097] The above can be used to implement the present invention.

[0098] Note: DCS is the abbreviation for Distributed Control System, also known as a centralized control system in the domestic automation industry. A distributed control system is a new type of computer control system relative to a centralized control system, developed and evolved from centralized control systems. It is a multi-level computer system composed of process control and process monitoring levels linked by a communication network, integrating computer, communication, display, and control technologies (4C). Its basic principles are decentralized control, centralized operation, hierarchical management, flexible configuration, and convenient configuration. DCS control technology is an existing technology easily implemented by those skilled in the art and will not be detailed here.

[0099] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. An automated control device for a sulfur melting kettle, comprising a sulfur melting kettle, characterized in that, It also includes a sulfur foam control system (L1), a clear liquid control system (Q1), a steam control system (Z1), a liquid sulfur control system (Y), and a condensate control system (S), which are respectively connected to the sulfur melting kettle. The sulfur melting kettle includes a kettle structure, a kettle heating kit connected to the kettle structure, and a slag discharge mechanism (8). The kettle structure includes an upper head (1), a kettle body (2), and a lower cone (5) connected from top to bottom. The slag discharge mechanism (8) includes a hollow, sealed elongated shell (81). One end of the shell (81) is rotatably connected to the vessel body (2). The slag discharge mechanism (8) also includes a cover assembly (82) rotatably connected to the other end of the shell (81) and a balance assembly (88) horizontally arranged inside the shell (81). A slag discharge channel (811) is provided inside the shell (81). One end of the slag discharge channel (811) is connected to the vessel body (2) through a metal hose (86), and the other end is in separate contact with the cover assembly (82). A slag discharge end cap (861) is provided at the end of the metal hose (86) connected to the vessel body (2). The sulfur foam control system (L1), clear liquid control system (Q1), steam control system (Z1), liquid sulfur control system (Y), condensate control system (S), and balance component (88) are respectively connected to DCS / PLC; the cover component (82) includes a cover (821), a rod (822), and a counterweight (823) connected from top to bottom. The cover (821) is horizontally provided with a pin that is rotatably connected to the housing (81). The cover (821) is provided with a cover hole (8211) corresponding to the slag discharge channel (811). The upper and lower sides of the housing (81) are respectively provided with an upper limit position (831) and a lower limit position (832) for limiting the rotation of the cap (821), and the upper limit position (831) and the lower limit position (832) are respectively connected to the DCS / PLC.

2. The automated control sulfur melting kettle device according to claim 1, characterized in that, Temperature sensor one (841) and temperature sensor two (842) are respectively provided on the upper and lower sides of the housing (81), and the temperature sensor one (841) and temperature sensor two (842) are respectively connected to DCS / PLC.

3. The automated control device for sulfur melting kettle according to claim 1, characterized in that, The upper end cap (1) is provided with a sulfur foam inlet (a), a clear liquid outlet (b), a clear liquid thermometer port (c), and an internal pressure gauge port (d). The vessel heating kit includes an external heating structure consisting of a jacket (3) on the outside of the vessel body (2) and a lower conical sleeve (6) on the outside of the lower conical body (5), and an internal heating structure (4) disposed on the inside of the vessel body (2). The sulfur foam inlet (a) is connected to the sulfur foam storage tank (L) through the sulfur foam control system (L1), the clear liquid outlet (b) is connected to the clear liquid tank (Q) through the clear liquid control system (Q1), the clear liquid thermometer port (c) is connected to the clear liquid thermometer (TIA1002) on the top of the reactor, and the pressure gauge port (d) inside the reactor is connected to the pressure gauge (PIA1002) of the sulfur melting reactor. The side of the vessel body (2) is provided with a number of internal steam ports (e) and a number of internal thermometer ports (f). The side of the jacket (3) is provided with a jacket steam port (j), a jacket pressure gauge port (g), and a jacket thermometer port (k). There are at least three internal steam ports (e) and at least three internal thermometer ports (f), and they are evenly distributed vertically along the side of the vessel body. The inlet end of the steam port (e) inside the vessel and the inlet end of the steam port (j) in the jacket are respectively connected to the steam control system (Z1), the outlet end of the steam port (e) inside the vessel is connected to the inlet end of the heating structure (4) inside the vessel, the outlet end of the steam port (j) in the jacket is connected to the jacket (3), and the outlet end of the heating structure (4) inside the vessel is connected to the heating structure outside the vessel. The inlet (f) of the thermometer inside the vessel is connected to the thermometer of the sulfur melting vessel (TICA1001), the outlet (g) of the jacket pressure gauge is connected to the jacket pressure gauge (PIA1003), and the outlet (k) of the jacket thermometer is connected to the jacket thermometer (TICA1002). The sulfur melting kettle thermometer (TICA1001) and the jacket thermometer (TICA1002) are connected to the steam control system (Z1) via the DCS / PLC; The bottom end of the lower cone (5) is provided with a liquid sulfur outlet (i), which is connected to the liquid sulfur control system (Y). The liquid sulfur control system (Y) is connected to the sulfur treatment equipment (Y3). The bottom end of the lower cone sleeve (6) is provided with a condensate outlet (h), which is connected to the condensate control system (S).

4. The automated control device for sulfur melting kettle according to claim 1, characterized in that, The sulfur foam control system (L1) includes a sulfur foam flow meter (FE1001) and a sulfur foam flow system (L2) installed from left to right. The sulfur foam flow system (L2) includes a sulfur foam inlet regulating valve (PCV1001), a sulfur foam manual valve one (LSV1001) and a sulfur foam manual valve two (LSV1002) installed at both ends of the sulfur foam inlet regulating valve (PCV1001), and a sulfur foam bypass valve (LPV1001) connected between the inlet of sulfur foam manual valve one (LSV1001) and the outlet of sulfur foam manual valve two (LSV1002).

5. The automated control device for sulfur melting kettle according to claim 1, characterized in that, The clear liquid control system (Q1) includes a clear liquid outlet regulating valve (PCV1007), a clear liquid manual valve one (LSV1003) and a clear liquid manual valve two (LSV1004) installed at both ends of the clear liquid outlet regulating valve (PCV1007), and a clear liquid bypass valve (LPV1002) connected between the inlet of clear liquid manual valve one (LSV1003) and the outlet of clear liquid manual valve two (LSV1004).

6. The automated control device for sulfur melting kettle according to claim 1, characterized in that, The steam control system (Z1) includes a steam monitoring system, a main steam valve (LZV1005), and a steam flow system arranged from left to right. The steam monitoring system is connected to the steam source (Z). The steam monitoring system includes a steam flow meter (FE1002), a steam pressure gauge (PIA1001), and a steam thermometer (TIA1001) arranged sequentially from left to right on the steam main pipe. The steam flow system includes a jacketed steam flow system (Z2) and an in-vessel steam flow system (Z3) connected in parallel. The jacketed steam flow system (Z2) includes a jacketed steam inlet regulating valve (PCV10021), a jacketed steam manual valve one (LSV10051) and a jacketed steam manual valve two (LSV10061) installed at both ends of the jacketed steam inlet regulating valve (PCV10021), and a jacketed steam bypass valve (LPV10031) connected between the inlet of the jacketed steam manual valve one (LSV10051) and the outlet of the jacketed steam manual valve two (LSV10061). The in-vessel steam flow system (Z3) includes an in-vessel steam inlet regulating valve (PCV10022), an in-vessel steam manual valve one (LSV10052) and an in-vessel steam manual valve two (LSV10062) installed at both ends of the in-vessel steam inlet regulating valve (PCV10022), and an in-vessel steam bypass valve (LPV10032) connected between the inlet of the in-vessel steam manual valve one (LSV10052) and the outlet of the in-vessel steam manual valve two (LSV10062).

7. The automated control device for sulfur melting kettle according to claim 1, characterized in that, The liquid sulfur control system (Y) includes, from top to bottom, a liquid sulfur flow system (Y1), a liquid sulfur hydrophobic system (Y2), and a liquid sulfur outlet thermometer (TIA1003). The liquid sulfur flow system (Y1) includes a liquid sulfur outlet regulating valve (PCV1006), a liquid sulfur manual valve one (LSV1007) and a liquid sulfur manual valve two (LSV1008) installed at both ends of the liquid sulfur outlet regulating valve (PCV1006), and a liquid sulfur bypass valve (LPV1004) connected between the inlet of the liquid sulfur manual valve one (LSV1007) and the outlet of the liquid sulfur manual valve two (LSV1008). The liquid sulfur hydrophobic system (Y2) includes a liquid sulfur hydrophobic valve (S1002), a hydrophobic manual valve one (LSV1009) and a hydrophobic manual valve two (LSV1010) installed at both ends of the liquid sulfur hydrophobic valve (S1002), and a hydrophobic bypass valve (LPV1005) connected between the inlet of the hydrophobic manual valve one (LSV1009) and the outlet of the hydrophobic manual valve two (LSV1010).

8. The automated control device for sulfur melting kettle according to claim 1, characterized in that, The condensate control system (S) includes a condensate drain valve (S1001), a condensate manual valve one (LSV1011) and a condensate manual valve two (LSV1012) installed at both ends of the condensate drain valve (S1001), and a condensate bypass valve (LPV1006) connected between the inlet of the condensate manual valve one (LSV1011) and the outlet of the condensate manual valve two (LSV1012).

9. A method for automatically controlling a sulfur melting kettle, based on the automated sulfur melting kettle device as described in any one of claims 1-8, characterized in that, Specifically, the steps include the following: Step S1: Open all manual valves in the system, open the condensate drain valve (S1001) and the liquid sulfur drain valve (S1002), and close all other valves; Step S2: Set the temperature values ​​inside the vessel and the jacket temperature values ​​through the DCS / PLC. Open the jacket steam inlet regulating valve (PCV10021), the vessel steam inlet regulating valve (PCV10022), and the main steam valve (LZV1005) respectively. Introduce steam into the steam control system (Z1) to raise the temperature. When the temperature reaches 80 degrees Celsius on the uppermost sulfur melting vessel thermometer (TICA1001), open the sulfur foam inlet regulating valve (PCV1001) to introduce sulfur foam. Adjust the clear liquid outlet regulating valve (PCV1007) to make the pressure gauge (PIA1002) of the sulfur melting vessel 0.5-0.9 MPa. Continue to raise the temperature until the clear liquid thermometer (TIA1002) at the top of the vessel reaches 70 degrees Celsius. Step S3: Continue heating. When the temperature displayed on the molten sulfur kettle thermometer (TICA1001) is above the kettle temperature, open the bottom liquid sulfur outlet regulating valve (PCV1006) to drain the liquid sulfur. Increase the opening of the sulfur foam inlet regulating valve (PCV1001) to balance the flow rate into and out of the molten sulfur kettle. Interlock the molten sulfur kettle thermometer (TICA1001) with the kettle steam inlet regulating valve (PCV10022) and the jacket thermometer (TICA1001) with the jacket steam inlet regulating valve (PCV10022). When the molten sulfur kettle thermometer (TICA1001) value is lower or higher than the kettle temperature, the opening of the kettle steam inlet regulating valve (PCV10022) will increase or decrease. When the jacket thermometer (TICA1001) value is lower or higher than the jacket temperature, the opening of the jacket steam inlet regulating valve (PCV10022) will increase or decrease, thus achieving automatic control. Step S4: The liquid sulfur layer (YL) gradually rises above the slag discharge mechanism (8). The slag discharge mechanism (8) drives the cap (821) to move upward. The cap (821) is rotated clockwise along the slag discharge channel (811) by the lever action of the counterweight (823), so that the cap (821) contacts the lower limit (832). The cap (821) covers the slag discharge channel (811), and the slag discharge mechanism (8) does not discharge slag. Step S5: As the reaction proceeds, sulfur slag accumulates on the liquid sulfur layer (YL) to form a sulfur slag layer (LZ). When the cap (821) is between the lower limit (832) and the upper limit (831), and the temperature measured by temperature sensor one (841) and temperature sensor two (842) is greater than that measured by the clear liquid thermometer (TIA1002) at the top of the vessel, the slag discharge mechanism (8) enters the sulfur slag layer (LZ). The slag discharge mechanism (8) is in a horizontal state, and the cap hole (8211) is connected to the slag discharge channel (811). The sulfur slag passes through the cap hole (8211) and is discharged from the molten sulfur vessel through the slag discharge channel (811). Step S6: Observe the state of the discharged sulfur slag, and combine the temperature display of temperature sensor 1 (841) and temperature sensor 2 (842) to determine whether the temperature of the sulfur slag produced in the sulfur melting kettle is appropriate, and then make further adjustments. When the cap (821) touches the upper limit (831) or lower limit (832), the sulfur slag is completely discharged. Step S7: The condensate control system (S) and the liquid sulfur drainage system (Y2) discharge system water into the condensate tank (S1) through the condensate drain valve (S1001) and the liquid sulfur drain valve (S1002), respectively.

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