A sulfur fusion intelligent metering and waste gas grading high-efficiency purification device and process method thereof

Abstract

This invention relates to the field of intelligent environmental quality control technology in petrochemical sulfur processing, and particularly to a high-efficiency purification device and process method for intelligent metering and graded waste gas purification of molten sulfur. Addressing the current industry situation where molten sulfur loading processes suffer from severe flue gas volatilization, significant safety hazards, and low automation, this invention overturns the traditional manual operation and open loading mode. It adopts a waste gas treatment method combining fully enclosed conveying and collection, effectively reducing the diffusion of toxic and harmful gases, lowering environmental pollution, and achieving a green and environmentally friendly effect. Simultaneously, by introducing remote intelligent control and multiple safety protection technologies, it achieves fully automated, enclosed, and information-based management of the loading operation. This invention can promote the green, safe, and intelligent development of the petrochemical industry, and has positive significance for improving the information system for safe equipment operation, building a dual prevention mechanism for risk control and hazard management, and accelerating the intelligent construction of petrochemical plants.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology for environmental protection quality in petrochemical sulfur processing, specifically to an intelligent sulfur melting metering and high-efficiency waste gas classification and purification device and its process method. Background Technology

[0002] In response to the major national demand for green development of petrochemical energy, molten sulfur in the sulfur recovery industry chain has long faced many industry-wide technical challenges due to its inherent characteristics such as high temperature, easy solidification, flammability, explosiveness, and strong corrosiveness.

[0003] Since the freezing point of molten sulfur is about 119°C, it must be continuously heated to keep it liquid before loading. The loading process must be kept at a high temperature to prevent the medium from solidifying and blocking. Once the temperature is out of control, it may cause pipeline condensation or even the shutdown of the entire production line. The entire transportation and loading process requires strict temperature control. In addition, traditional loading methods are mostly open or semi-closed operations, which are very easy to cause a large amount of sulfur vapor and trace amounts of hydrogen sulfide harmful fumes to spread around the tanker opening due to temperature fluctuations or improper operation. This not only seriously threatens the occupational health of on-site operators, but the high concentration of sulfur dust and vapor environment also poses a great risk of combustion and explosion.

[0004] At the same time, the existing loading mode generally suffers from problems such as large metering errors, serious flue gas volatilization, prominent safety hazards, high labor intensity and low degree of automation. This not only causes the loss of sulfur products and environmental pollution, but also seriously restricts the intelligent upgrading of the production process. The temperature control conditions of molten sulfur medium are harsh and the operational stability is difficult to control, which makes traditional flow meters poorly adaptable under this condition. The operating accuracy is greatly affected by temperature fluctuations. The yellow smoke pollution and resource waste in the loading area have been difficult to effectively curb for a long time. The entire industry has always lacked a systematic solution that can take into account accuracy, safety and environmental protection.

[0005] Therefore, fundamentally solving common problems such as accurate metering, efficient sealing, and safety and environmental protection in the process of loading molten sulfur has become an urgent need restricting the quality improvement, upgrading, and intelligent transformation of my country's petrochemical industry. Summary of the Invention

[0006] The purpose of this invention is to provide a safe, environmentally friendly, intelligent, controllable, stable, and emission-reducing intelligent high-precision metering process for sulfur melting and a harmless waste gas recovery device, which ultimately achieves "near-zero emissions" of harmful gases during the loading process, eliminating visual pollution and safety hazards.

[0007] The specific technical solution of the present invention is as follows:

[0008] A sulfur melting intelligent metering and waste gas classification high-efficiency purification device includes a sulfur melting trap, a sulfur melting storage device, an automated unmanned sealed lifting device, a high-precision density dynamic compensation metering indicator, a modular intelligent quantitative loading integrated device, an intelligent identification and tail gas recovery telescopic device, a sulfur desorption device, a tail gas incinerator, a waste heat recovery unit, and a waste gas desulfurization and decarbonization unit.

[0009] The outlet of the molten sulfur catcher is connected to the inlet of the molten sulfur storage device. The outlet of the molten sulfur storage device is connected to the inlet of the modular intelligent quantitative loading integrated device via an automated unmanned sealed lifting device. The high-precision density dynamic compensation metering indicator is connected in series on the molten sulfur conveying pipeline.

[0010] The docking end of the modular intelligent quantitative loading integrated device is equipped with the intelligent identification and exhaust gas recovery telescopic device. The gas phase exhaust gas passage of the device is sequentially connected to the sulfur desorption device, the exhaust gas incinerator, the waste heat recovery unit and the waste gas desulfurization and decarbonization unit.

[0011] Preferably, the modular intelligent quantitative loading integrated device includes a multi-layer locking sealing device, a gas phase negative pressure steady-state recovery pipe, an intelligent identification and automatic positioning docking telescopic pipe, an fusible sulfur loading pipeline system, a pneumatic rotary connection mechanism, a gas phase flame arrestor, support columns and support frames, a steam evacuator device, and a pneumatic rotary connection.

[0012] The fusible sulfur loading pipeline system and the gas phase negative pressure steady-state recovery pipe are both erected on one side of the support column and support frame rod. The intelligent identification and automatic positioning docking telescopic pipe is connected to the docking end of the fusible sulfur loading pipeline system. The multi-layer locking sealing device is set at the docking end of the intelligent identification and automatic positioning docking telescopic pipe.

[0013] The pneumatic rotary joint is located at the pipeline bend of the fusible sulfur loading pipeline system; the gas phase flame arrestor, the pneumatic rotary joint, and the steam evacuator are connected in series on the gas phase negative pressure steady-state recovery pipeline.

[0014] Preferably, the modular intelligent quantitative loading integrated device further includes a dual-redundant intelligent detection controller, a multi-sensor intelligent fusion high-precision measurement control box, a 0.3MPa steam power pipeline, a tail gas recovery process system pipeline, a fusible sulfur loading process system pipeline, a combustible and toxic gas leak prevention automatic alarm device, a remote video monitoring system, a remote automatic emergency shut-off device, and a dual-circuit static grounding elimination device.

[0015] The 0.3MPa steam power pipeline is connected to the steam vacuum pump and each pneumatic component. The pipeline of the fusible sulfur loading process system is connected to the fusible sulfur loading pipeline system. The pipeline of the tail gas recovery process system is connected to the gas phase negative pressure steady-state recovery pipeline.

[0016] Preferably, the molten sulfur storage device is equipped with a level gauge device, which includes a nitrogen anti-clogging backflushing system, a level sealing flange, a high-precision meter, a 0.3MPa steam heating system, an equipment sealing flange, a level metering pipeline, and an anti-clogging heating system;

[0017] The liquid level metering pipeline is fixedly installed on the side wall of the molten sulfur storage device via the liquid level sealing flange and the equipment sealing flange. The high-precision meter is connected in series to the extended main pipeline of the liquid level metering pipeline. The nitrogen anti-clogging backflush system is connected to the bypass on the side of the high-precision meter.

[0018] Both the 0.3MPa steam heating system and the anti-clogging heating system are installed on the outside of the liquid level metering pipeline.

[0019] Preferably, the level gauge device further includes a steam condensate recovery and reuse pipeline, a filtration and pressure reducing device, and a gas source;

[0020] The output end of the gas source is connected to a filter and pressure reducing device, and the outlet end of the filter and pressure reducing device is connected to a nitrogen anti-clogging backflush system. The purging port of the nitrogen anti-clogging backflush system is set inside the liquid level metering pipeline via a high-precision meter. The condensate outlet of the 0.3MPa steam heating system is connected to a steam condensate recovery and reuse pipeline.

[0021] Preferably, the waste heat recovery unit includes a primary waste heat recovery unit, a waste heat steam and hot water recovery and regeneration unit, and a secondary waste heat recovery unit. The primary waste heat recovery unit, the waste heat steam and hot water recovery and regeneration unit, and the secondary waste heat recovery unit are connected in series along the flue gas flow direction between the flue gas outlet of the tail gas incinerator and the air inlet of the waste gas desulfurization and decarbonization unit.

[0022] Preferably, the top of the molten sulfur storage device is provided with a sulfur vapor discharge cylinder, and the outlet of the sulfur vapor discharge cylinder is connected to the gas phase tail gas passage of the device via a steam evacuator, and the steam evacuator is connected to a 0.3MPa steam power pipeline.

[0023] Preferably, it also includes a remote video monitoring system and a three-dimensional visualization monitoring device for gas concentration, wherein the three-dimensional visualization monitoring device for gas concentration is connected to an automatic alarm device for preventing leaks of combustible and toxic gases.

[0024] A method for intelligent metering of sulfur melting and efficient purification of waste gas by staged treatment includes the following steps:

[0025] S1. The molten sulfur produced upstream is sent to the molten sulfur capture device for sulfur capture. The liquid molten sulfur is transported to the molten sulfur storage device for constant temperature temporary storage. The liquid level in the tank is monitored in real time by the liquid level gauge device and connected to the DCS control system. The sulfur vapor generated by volatilization at the top of the molten sulfur storage device is collected through the sulfur vapor discharge cylinder and pumped to the gas phase tail gas passage by the steam pump with 0.3MPa steam power.

[0026] S2. Liquid molten sulfur in the molten sulfur storage device is conveyed under closed pressure by an automated unmanned closed lifting device. A high-precision density dynamic compensation metering indicator connected in series on the conveying pipeline performs dynamic metering of molten sulfur with temperature compensation. Combined with the DCS control system, the conveying flow rate is continuously and precisely controlled.

[0027] S3. The metered molten sulfur is transported to the modular intelligent quantitative loading integrated device. Through intelligent identification and exhaust gas recovery telescopic device, it automatically docks and seals with the tank truck loading port. Quantitative loading is completed in the automatic fully enclosed loading control area. During the loading process, the sulfur vapor volatilized in the tank truck is extracted simultaneously. A flame arrestor is installed on the gas phase recovery pipeline to block the risk of backfire.

[0028] S4. The sulfur-containing exhaust gas collected during storage and loading is uniformly fed into the gas phase exhaust gas passage. It is first passed into a sulfur desorption device and a desulfurization solvent is added to absorb and recover sulfur components. Then it is sent to the exhaust gas incinerator to decompose harmful sulfides at high temperature. The high-temperature flue gas after incineration is cooled by multi-stage waste heat recovery and heat exchange, and finally enters the waste gas desulfurization and decarbonization unit. After deep purification by desulfurization circulating liquid solvent, it meets the emission standards. The waste liquid generated in the treatment process is transported to the sewage purification system for treatment.

[0029] Preferably, in step S4, the high-temperature flue gas discharged from the tail gas incinerator flows sequentially through a primary waste heat recovery unit, a waste heat steam and hot water recovery regenerator, and a secondary waste heat recovery unit for tiered waste heat recovery. The waste heat recovery unit is fed with demineralized water for heat exchange, and produces 0.3MPa steam, primary waste heat and secondary waste heat respectively, which are returned to the production system for recycling.

[0030] The beneficial effects of this invention are as follows:

[0031] This technology employs a waste gas treatment method that combines fully enclosed collection with negative pressure extraction, which fundamentally curbs the escape of harmful gases, effectively eliminates the yellow smoke pollution problem in the loading area, and substantially improves the on-site working environment and surrounding air quality, thus significantly enhancing environmental protection capabilities.

[0032] In addition, the application of intelligent control and remote monitoring technologies has enabled automated and unmanned management of loading operations, significantly reducing the risks and labor intensity of manual operations, and fundamentally improving the safety and economic efficiency of production facilities.

[0033] Meanwhile, the widespread application of this invention can effectively reduce material losses and subsequent treatment costs, improve the inherent safety level of technology and processes, environmental protection capabilities, and economic efficiency in the petrochemical industry. Combined with the cascade recovery and utilization of waste heat from tail gas incineration, it realizes the recycling and efficient use of thermal energy, significantly reduces production energy consumption and external heat loss, and achieves outstanding effects of energy conservation, consumption reduction, quality improvement, and efficiency enhancement. It continuously promotes the construction of digital and intelligent professional technologies to improve the safety and integrity management of equipment in chemical production processes, and provides technical support for the green, safe, and intelligent development of the petrochemical industry.

[0034] In addition, the process of this invention adopts a multi-sensor fusion metering method that combines mass flow rate with thermal temperature compensation, as well as a precise liquid level detection technology to prevent crystallization. This is applicable to the working conditions of molten sulfur, which is prone to solidification at high temperatures, significantly improving the accuracy of metering and liquid level detection, ensuring the accuracy of loading and metering, and reducing material metering losses.

[0035] Moreover, the method and process of this invention adopts a three-stage sulfur decomposition and carbon reduction treatment route, which achieves ultra-low emission standards for exhaust gas while recovering and purifying high-concentration sulfur components, realizing the recycling and regeneration of sulfur resources; the system has high operational reliability and can effectively improve the stability of production operation and the efficiency of operation and maintenance management.

[0036] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is a schematic diagram of the modular intelligent quantitative loading integrated device of the present invention;

[0039] Figure 3 This is a schematic diagram of the liquid level gauge device of the present invention;

[0040] Figure 4 This is a process flow diagram of the present invention;

[0041] Figure labels: 1-Molten sulfur catcher; 2-Molten sulfur storage device; 3-Automated unmanned closed lifting device; 4-High-precision density dynamic compensation metering indicator; 5-Modular intelligent quantitative loading integrated device; 6-Intelligent identification and exhaust gas recovery telescopic device; 7-Automatic fully enclosed loading control area; 8-Remote video monitoring system; 9-Gas concentration three-dimensional visualization monitoring device; 10-Flame arrestor; 11-Sulfur vapor discharge cylinder; 12-Level gauge device; 13-Steam vacuum pump; 14-Sulfur desorption device; 15-Exhaust gas incinerator; 16-Primary waste heat recovery unit; 17-Waste heat steam and hot water recovery regenerator; 18-Secondary waste heat recovery unit; 19-Waste gas desulfurization and decarbonization unit; 20-Multi-modal anti-overflow automatic interlocking protection device; 21-Multi-layer locking sealing device; 22-Gas phase negative pressure steady-state recovery pipe; 23-Intelligent identification and automatic positioning docking telescopic pipe; 24-Fluorescent sulfur 25-Loading pipeline system; 26-Pneumatic rotary joint mechanism; 27-Gas phase flame arrestor; 28-Support column and support frame rod; 29-Steam vacuum pump device; 30-Pneumatic rotary joint; 31-Dual redundant intelligent detection controller; 32-Multi-sensor intelligent fusion high-precision measurement control box; 33-0.3MPa steam power pipeline; 34-Tail gas recovery process system pipeline; 35-Fluid sulfur loading process system pipeline; 36-Automatic alarm device for preventing leakage of combustible and toxic gases; 37-Remote automatic emergency shut-off device; 38-Dual-circuit static grounding elimination device; 39-Nitrogen anti-clogging backflushing system; 40-Liquid level sealing flange; 41-0.3MPa steam heating system; 42-Equipment sealing flange; 43-Liquid level metering pipeline; 44-Anti-clogging heating system; 45-Steam condensate recovery and reuse pipeline; 46-Filter and pressure reducing device; 47-Gas source. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] like Figure 1As shown, a high-efficiency sulfur-melting intelligent metering and waste gas classification purification device and its process method are disclosed. In the material conveying path, the outlet of the sulfur-melting capture device 1 is connected to the inlet of the sulfur-melting storage device 2, meaning that the sulfur-melting material produced in the previous process is captured and temporarily stored in the sulfur-melting storage device 2. The outlet of the sulfur-melting storage device 2 is connected to the inlet of the modular intelligent quantitative loading integrated device 5 via an automated unmanned sealed lifting device 3. A high-precision density dynamic compensation metering indicator 4 is connected in series on the main sulfur-melting pipeline between the two, and is connected to the metering section of the pipeline. An intelligent identification and exhaust gas recovery telescopic device 6 is installed at the docking end of the modular intelligent quantitative loading integrated device 5, and is positioned above the automatic fully enclosed loading control area 7. A flame arrestor 10 is also installed on the gas phase recovery branch pipeline of the automatic fully enclosed loading control area 7.

[0044] The automated unmanned sealed lifting device 3 and the high-precision density dynamic compensation metering indicator 4 are respectively connected to the distributed control system. The automated unmanned sealed lifting device 3 is connected to the DCS through pressure signal to realize remote pressure control, and the high-precision density dynamic compensation metering indicator 4 is connected to the DCS through flow signal to realize remote flow control. After the loading operation is started with one button in the central control room, the metering intelligent control system automatically completes the quantitative loading and automatically stops, realizing unmanned remote intelligent control operation.

[0045] Along the gas phase tail gas treatment path, a sulfur desorption unit 14, a tail gas incinerator 15, a waste heat recovery unit, and a waste gas desulfurization and decarbonization unit 19 are sequentially connected in series along the gas flow direction. The sulfur desorption unit 14 is connected to a desulfurization solvent, and the waste gas desulfurization and decarbonization unit 19 is connected to a desulfurization circulating liquid solvent. The waste heat steam and hot water recovery regenerator 17 and the secondary waste heat recovery unit 18 in the waste heat recovery unit are both connected to demineralized water. A sulfur vapor discharge cylinder 11 and a level gauge 12 are respectively installed on the top of the molten sulfur storage device 2. The outlet of the sulfur vapor discharge cylinder 11 is connected to the front end of the gas phase tail gas passage via a steam evacuator 13, which is connected to an external 0.3MPa steam power pipeline.

[0046] The waste heat recovery unit includes a primary waste heat recovery unit 16, a waste heat steam and hot water recovery and regenerator 17, and a secondary waste heat recovery unit 18. These three units are connected in series along the flue gas flow direction, with their ends connected to the flue gas outlet of the tail gas incinerator 15 and the air inlet of the waste gas desulfurization and decarbonization unit 19, respectively. During operation, the waste heat steam and hot water recovery and regenerator 17 produces 0.3 MPa steam for reuse and primary waste heat for reuse, while the secondary waste heat recovery unit 18 produces secondary waste heat for reuse. The waste gas desulfurization and decarbonization unit 19 discharges waste liquid for wastewater purification.

[0047] During operation, the sulfur-containing tail gas is first pretreated by the sulfur desorption device 14 to initially separate and recover the sulfur-containing components in the tail gas. The desorbed gas phase enters the tail gas incinerator 15 for high-temperature incineration and decomposition, converting harmful sulfides into sulfur dioxide, creating conditions for subsequent desulfurization treatment. The high-temperature flue gas generated by incineration flows sequentially through the primary waste heat recovery unit 16, the waste heat steam and hot water recovery and regeneration unit 17, and the secondary waste heat recovery unit 18 to achieve cascade heat recovery.

[0048] The primary waste heat recovery unit 16 and the waste heat steam and hot water recovery and regeneration unit 17 produce 0.3MPa steam and 115℃ hot water, which are returned to the production unit to achieve heat energy recycling. The secondary waste heat recovery unit 18 produces 60~85℃ hot water, which is supplied to domestic water and refrigeration and heating systems, realizing the cascade utilization and recycling of energy. After being cooled by multi-stage waste heat recovery, the flue gas finally enters the waste gas desulfurization and decarbonization unit 19 for purification treatment. The waste liquid discharged from the desulfurization and decarbonization unit is sent to the sewage purification plant.

[0049] Through the above-mentioned cascade utilization of thermal energy and material recycling, the external heat loss and fuel consumption are effectively reduced, achieving energy conservation, consumption reduction and quality improvement.

[0050] It also includes a remote video monitoring system 8 and a gas concentration three-dimensional visualization monitoring device 9. The remote video monitoring system 8 and the gas concentration three-dimensional visualization monitoring device 9 are installed on the modular intelligent quantitative loading integrated device 5. Its monitoring range covers the entire operating area of ​​the device. The gas concentration three-dimensional visualization monitoring device 9 is connected to the combustible and toxic gas leak prevention automatic alarm device 35 to realize the interactive transmission of monitoring data.

[0051] It also includes two distributed control systems (DCS). The first DCS is connected to the modular intelligent quantitative loading integrated device 5 and the intelligent identification and exhaust gas recovery telescopic device 6 via pressure signal (PV), to the high-precision density dynamic compensation metering indicator 4 via flow signal (FI), and to the automated unmanned sealed lifting device 3 via pressure signal (PI). The second DCS is connected to the level gauge device 12 via level signal (LI).

[0052] like Figure 2 The modular intelligent quantitative loading integrated device 5 is constructed with support columns and support rods 27 to form a three-dimensional load-bearing frame. Material pipelines, gas pipelines, pneumatic actuators, and control and safety protection components are integrated and laid on the frame.

[0053] In terms of specific layout, the fusible sulfur loading pipeline system 24 and the gas phase negative pressure steady-state recovery pipe 22 are both erected on the same side of the supporting columns and supporting frame rods 27, and the two pipelines are fixed in layers along the height direction of the frame. The fusible sulfur loading pipeline system 24 is equipped with a pneumatic rotary joint mechanism 25 at the pipeline turning node for pipeline angle conversion; on the gas phase negative pressure steady-state recovery pipe 22, a gas phase flame arrestor 26, a pneumatic rotary joint 29 and a steam evacuator device 28 are connected in series along the airflow direction.

[0054] The fusible sulfur loading pipeline system 24 is connected to an intelligent identification and automatic positioning telescopic pipe 23 at its docking end facing the loading station. The telescopic pipe can extend and retract axially. A multi-layer locking sealing device 21 is installed at the docking end face of the intelligent identification and automatic positioning telescopic pipe 23. The fusible sulfur loading pipeline system 24 is also equipped with a multi-modal anti-overflow automatic interlocking protection device 20.

[0055] The integrated unit also includes a 0.3MPa steam power pipeline 32, a fusible sulfur loading process system pipeline 34, and a tail gas recovery process system pipeline 33. The 0.3MPa steam power pipeline 32 is laid along the supporting frame and connects to the steam evacuator 28 and the fusible sulfur loading pipeline system 24, respectively. The fusible sulfur loading process system pipeline 34 is connected to the fusible sulfur loading pipeline system 24, forming a complete process path for molten sulfur loading. The tail gas recovery process system pipeline 33 is connected to the gas phase negative pressure steady-state recovery pipe 22, used to transport the recovered gas phase externally.

[0056] Regarding control and safety protection components, the device platform is equipped with a dual-redundant intelligent detection controller 30, which is connected to a multi-sensor intelligent fusion high-precision measurement control box 31. It also includes an automatic alarm device 35 for preventing leaks of flammable and toxic gases, a remote video monitoring system 8, a remote automatic emergency shut-off device 36, and a dual-circuit static grounding elimination device 37. These components are respectively installed at corresponding workstations such as pipeline nodes, the perimeter of the work area, and grounding interfaces.

[0057] like Figure 3 The level gauge device 12 uses the level metering pipeline 43 as the main metering passage. The level metering pipeline 43 is fixedly installed on the side wall of the molten sulfur storage device 2 through the level sealing flange 39 and the equipment sealing flange 42. The upper and lower ends of the pipeline are respectively connected to the internal cavity of the molten sulfur storage device 2. A high-precision meter 40 is connected in series on the main pipeline section extending outward from the level metering pipeline 43. The high-precision meter 40 can detect the highest and lowest measured liquid levels h1, covering the effective metering range of the level metering pipeline, denoted as H.

[0058] Outside the liquid level metering pipeline 43, a 0.3MPa steam heating system 41 and an anti-clogging heating system 44 are installed along the pipeline axis, covering the effective metering section of the pipeline; at the condensate outlet of the 0.3MPa steam heating system 41, a steam condensate recovery and reuse pipeline 45 is connected to lead the condensate after heat exchange outward.

[0059] Furthermore, the level gauge device 12 is also equipped with a nitrogen anti-clogging backflushing system 38, a filter and pressure reducing device 46, and a gas source 47. The output end of the gas source 47 is connected to the inlet end of the filter and pressure reducing device 46, and the gas after pressure regulation by the filter and pressure reducing device 46 is output to the nitrogen anti-clogging backflushing system 38; the purging port of the nitrogen anti-clogging backflushing system 38 is connected to the side of the level metering pipeline 43, and the port is set facing the internal cavity of the level metering pipeline 43. The level gauge device 12 is also equipped with a DCS, which is connected to the high-precision meter 40 through the level alarm signal (LIA) to realize real-time acquisition and alarm control of level parameters.

[0060] This embodiment also includes a process method, implemented using the above-described apparatus, and the specific process method is as follows:

[0061] After the molten sulfur is captured by the sulfur capture device 1, it is collected and transported to the molten sulfur storage device 2 through a jacketed insulated pipeline. The molten sulfur storage device 2 is equipped with a multi-pipe steam heating device to maintain the sulfur in a stable liquid state. The temperature sensor and heating element form a feedback loop to connect to the control system, realizing remote intelligent automatic temperature control.

[0062] The side wall of the molten sulfur storage unit 2 is equipped with a level gauge device 12, which adopts nitrogen pressurization and quantitative backflushing technology to accurately measure the liquid level data in the container through the high and low pressure difference. The detection parameters are transmitted to the DCS control system to realize remote real-time detection and remote liquid level transmission for safety control. The outside of the level gauge device 12 is equipped with an embedded jacketed insulation and heat tracing structure, as well as a nitrogen anti-clogging backflushing system 38, a high-precision meter 40, a 0.3MPa steam heating system 41, a liquid level metering pipeline 43, and an anti-clogging heating system 44, to ensure stable liquid level detection and prevent crystallization blockage. A sulfur vapor discharge cylinder 11 is installed at the top of the unit to collect the sulfur vapor generated by volatilization in the tank.

[0063] After temporary storage, the molten sulfur is conveyed in a closed system via an automated, unmanned, sealed lifting device 3. A high-precision density dynamic compensation metering indicator 4 is connected in series on the conveying pipeline. A multi-sensor fusion metering method combining mass flow rate, quantitative metering control, and thermal temperature compensation is adopted. The vibrating tube structure and signal processing algorithm of the mass flow rate control system are improved to achieve high-precision continuous control of the molten sulfur flow rate and ensure loading metering accuracy. The DCS system intelligently and remotely controls the output frequency of the frequency converter based on the indicated set values ​​such as flow rate, liquid level, and outlet pressure to achieve continuous, stable, and online adjustable control of the flow rate.

[0064] The metered molten sulfur is transported to the modular intelligent quantitative loading integrated device 5, where the quantitative loading operation of the tank truck is completed within the automatic fully enclosed loading control area 7. The intelligent identification and exhaust gas recovery telescopic device 6 at the docking end of the device automatically identifies the loading port of the tank truck and completes the positioning docking through the intelligent identification and automatic positioning docking telescopic pipe 23. The multi-layer locking sealing device 21 at the docking end achieves a fully enclosed connection of the loading port. The material is sent into the tank truck through the fusible sulfur loading pipeline system 24. During the loading process, the gas phase negative pressure steady-state recovery pipe 22 simultaneously extracts the sulfur vapor volatilized in the tank truck. The gas phase flame arrestor 26 and the steam evacuator device 28 connected in series on the pipeline ensure the collection of gas phase negative pressure and flame arrest safety, and prevent the escape of smoke from the loading area.

[0065] It also includes a remote video monitoring system 8 and a three-dimensional visualization monitoring device for gas concentration 9, constructing a virtual and real intelligent control platform, developing a parameter self-tuning PID controller, realizing multimodal human-machine interaction, establishing a fault knowledge graph and providing prediction of the remaining life of key components and maintenance suggestions; at the same time, there is also a multimodal anti-overflow automatic interlocking protection device 20, a dual-circuit static grounding elimination device 37 and a combustible and toxic gas leak prevention automatic alarm device 35, and a flame arrestor 10 is installed on the gas phase recovery branch pipeline to block the risk of backfire, ensuring all-round operational safety.

[0066] The sulfur-containing tail gas collected during storage and loading is uniformly channeled into the gas phase tail gas passage. The sulfur vapor collected by the sulfur vapor discharge cylinder 11 at the top of the molten sulfur storage device 2 is pumped to the tail gas treatment passage by the steam pump 13 at 0.3 MPa steam power. The sulfur-containing tail gas first enters the sulfur desorption device 14, where methyldiethanolamine is used as a decomposition agent to absorb the high-concentration sulfur components in the tail gas. The absorbed high-concentration sulfur components are then transported to the solvent regeneration unit for decomposition and purification, realizing sulfur recovery and refining, and completing the first-stage sulfur decomposition and carbon reduction.

[0067] The high-temperature flue gas generated from incineration flows sequentially through a primary waste heat recovery unit 16, a waste heat steam and hot water recovery and regeneration unit 17, and a secondary waste heat recovery unit 18 for tiered waste heat recovery. Different grades of steam and hot water are produced and returned to the production system for recycling, achieving tiered energy regeneration and energy conservation. After being cooled by waste heat recovery, the flue gas finally enters the waste gas desulfurization and decarbonization unit 19 for deep purification. Catalytic desulfurization using an alkaline diluent is applied for spray absorption, harmlessly degrading residual sulfur and carbon. After completing three stages of sulfur decomposition and carbon reduction, the gas meets emission standards, and the resulting waste liquid is uniformly sent to a wastewater purification system for treatment.

[0068] In summary

[0069] This embodiment adopts a combination of fully enclosed conveying and negative pressure collection to prevent the escape of sulfur vapor from storage, transportation to loading. It also includes staged exhaust gas treatment and waste heat recovery, while taking into account metering accuracy, operational safety, environmental emissions and energy utilization, so as to realize the full-process automation, enclosed and information management of molten sulfur loading operation.

[0070] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A sulfur melting intelligent metering and waste gas classification high-efficiency purification device, characterized in that, It includes a molten sulfur capture device (1), a molten sulfur storage device (2), an automated unmanned sealed lifting device (3), a high-precision density dynamic compensation metering indicator (4), a modular intelligent quantitative loading integrated device (5), an intelligent identification and tail gas recovery telescopic device (6), a sulfur desorption device (14), a tail gas incinerator (15), a waste heat recovery unit, and a waste gas desulfurization and decarbonization unit (19). The outlet of the molten sulfur catcher (1) is connected to the inlet of the molten sulfur storage device (2). The outlet of the molten sulfur storage device (2) is connected to the inlet of the modular intelligent quantitative loading integrated device (5) via an automated unmanned sealed lifting device (3). The high-precision density dynamic compensation metering indicator (4) is connected in series on the molten sulfur conveying pipeline. The modular intelligent quantitative loading integrated device (5) is equipped with the intelligent identification and tail gas recovery telescopic device (6) at its docking end. The gas phase tail gas passage of the device is sequentially connected to the sulfur analysis device (14), the tail gas incinerator (15), the waste heat recovery unit and the waste gas desulfurization and decarbonization unit (19).

2. The intelligent metering and high-efficiency purification device for sulfur melting and waste gas grading according to claim 1, characterized in that, The modular intelligent quantitative loading integrated device (5) includes a multi-layer locking sealing device (21), a gas phase negative pressure steady-state recovery pipe (22), an intelligent identification and automatic positioning docking telescopic pipe (23), a fusible sulfur loading pipeline system (24), a pneumatic rotary connection mechanism (25), a gas phase flame arrestor (26), a support column and support frame rod (27), a steam vacuum device (28), and a pneumatic rotary connection (29). The fusible sulfur loading pipeline system (24) and the gas phase negative pressure steady-state recovery pipe (22) are both erected on one side of the support column and support frame rod (27). The intelligent identification and automatic positioning docking telescopic pipe (23) is connected to the docking end of the fusible sulfur loading pipeline system (24). The multi-layer locking sealing device (21) is set at the docking end of the intelligent identification and automatic positioning docking telescopic pipe (23). The pneumatic rotary joint (25) is located at the pipeline turning point of the fusible sulfur loading pipeline system (24); the gas phase flame arrestor (26), the pneumatic rotary joint (29) and the steam evacuator (28) are connected in series on the pipeline of the gas phase negative pressure steady-state recovery pipe (22).

3. The intelligent sulfur melting metering and waste gas classification high-efficiency purification device according to claim 2, characterized in that, The modular intelligent quantitative loading integrated device (5) also includes a dual-redundant intelligent detection controller (30), a multi-sensor intelligent fusion high-precision measurement control box (31), a 0.3MPa steam power pipeline (32), a tail gas recovery process system pipeline (33), a fusible sulfur loading process system pipeline (34), a combustible and toxic gas leak prevention automatic alarm device (35), a remote video monitoring system (8), a remote automatic emergency shut-off device (36), and a dual-circuit static grounding elimination device (37). The 0.3MPa steam power pipeline (32) is connected to the steam vacuum pump device (28) and each pneumatic component. The fusible sulfur loading process system pipeline (34) is connected to the fusible sulfur loading pipeline system (24). The tail gas recovery process system pipeline (33) is connected to the gas phase negative pressure steady-state recovery pipe (22).

4. The intelligent metering and high-efficiency purification device for sulfur melting and waste gas grading according to claim 1, characterized in that, The molten sulfur storage device (2) is equipped with a level gauge device (12), which includes a nitrogen anti-clogging backflush system (38), a level sealing flange (39), a high-precision meter (40), a 0.3MPa steam heating system (41), an equipment sealing flange (42), a level metering pipeline (43), and an anti-clogging heating system (44). The liquid level metering pipeline (43) is fixedly installed on the side wall of the molten sulfur storage device (2) through the liquid level sealing flange (39) and the equipment sealing flange (42). The high-precision meter (40) is connected in series to the extended main pipeline of the liquid level metering pipeline (43). The nitrogen anti-clogging backflush system (38) is connected to the bypass on the side of the high-precision meter (40). The 0.3MPa steam heating system (41) and the anti-clogging heating system (44) are both installed on the outside of the liquid level metering pipeline (43).

5. The intelligent metering and high-efficiency purification device for sulfur melting and waste gas grading according to claim 4, characterized in that, The level gauge device (12) also includes a steam condensate recovery and reuse pipeline (45), a filter pressure reducing device (46), and a gas source (47). The output end of the gas source (47) is connected to the filter pressure reducing device (46), the outlet end of the filter pressure reducing device (46) is connected to the nitrogen anti-clogging backflush system (38), and the purging port of the nitrogen anti-clogging backflush system (38) is set inside the liquid level metering pipeline (43) via a high-precision meter (40); the condensate outlet of the 0.3MPa steam heating system (41) is connected to the steam condensate recovery and reuse pipeline (45).

6. The intelligent metering and high-efficiency purification device for sulfur melting and waste gas grading according to claim 1, characterized in that, The waste heat recovery unit includes a primary waste heat recovery unit (16), a waste heat steam and hot water recovery and regeneration unit (17), and a secondary waste heat recovery unit (18). The primary waste heat recovery unit (16), the waste heat steam and hot water recovery and regeneration unit (17), and the secondary waste heat recovery unit (18) are connected in series along the flue gas flow direction between the flue gas outlet of the tail gas incinerator (15) and the air inlet of the waste gas desulfurization and decarbonization unit (19).

7. The intelligent metering and high-efficiency purification device for sulfur melting and waste gas grading according to claim 1, characterized in that, The top of the molten sulfur storage device (2) is provided with a sulfur vapor discharge cylinder (11). The outlet of the sulfur vapor discharge cylinder (11) is connected to the gas phase tail gas passage of the device via a steam vacuum pump (13). The steam vacuum pump (13) is connected to a 0.3MPa steam power pipeline.

8. The intelligent metering and high-efficiency purification device for sulfur melting and waste gas grading according to claim 1, characterized in that, It also includes a remote video monitoring system (8) and a three-dimensional visualization monitoring device for gas concentration (9), wherein the three-dimensional visualization monitoring device for gas concentration (9) is connected to an automatic alarm device for preventing leaks of combustible and toxic gases (35).

9. A method for intelligent metering of sulfur melting and efficient purification of waste gas through staged processes, characterized in that, Includes the following steps: S1. Molten sulfur is fed into the molten sulfur capture device (1) for sulfur capture. Liquid molten sulfur is transported to the molten sulfur storage device (2) for constant temperature storage. The liquid level in the tank is monitored in real time by the liquid level gauge device (12) and connected to the DCS control system. The sulfur vapor generated by the volatilization at the top of the molten sulfur storage device (2) is collected by the sulfur vapor discharge cylinder (11) and pumped to the gas phase tail gas passage by the steam pump (13) with 0.3MPa steam as the power. S2. The liquid molten sulfur in the molten sulfur storage device (2) is conveyed under closed pressure by an automated unmanned closed lifting device (3). A high-precision density dynamic compensation metering indicator (4) connected in series on the conveying pipeline performs dynamic metering of the molten sulfur with temperature compensation. Combined with the DCS control system, the conveying flow rate is continuously and precisely controlled. S3. The metered molten sulfur is transported to the modular intelligent quantitative loading integrated device (5). It is automatically connected and sealed with the tank truck loading port through the intelligent identification and tail gas recovery telescopic device (6). Quantitative loading is completed in the automatic fully enclosed loading control area (7). During the loading process, the sulfur vapor volatilized in the tank truck is extracted simultaneously. A flame arrestor (10) is set on the gas phase recovery pipeline to block the risk of backfire. S4. The sulfur-containing tail gas collected during the storage and loading process is uniformly fed into the gas phase tail gas passage. It is first fed into the sulfur desorption device (14) and the desulfurization desorption solvent is added to absorb and recover the sulfur components. Then it is sent to the tail gas incinerator (15) to decompose harmful sulfides at high temperature. The high-temperature flue gas after incineration is cooled by multi-stage waste heat recovery and heat exchange, and finally enters the waste gas desulfurization and decarbonization unit (19). After deep purification by the desulfurization circulating liquid solvent, it meets the emission standards. The waste liquid generated in the process is transported to the sewage purification system for treatment.

10. The intelligent metering and efficient purification process for sulfur melting and waste gas classification according to claim 1, characterized in that, In step S4, the high-temperature flue gas discharged from the tail gas incinerator (15) flows sequentially through the primary waste heat recovery unit (16), the waste heat steam and hot water recovery regenerator (17), and the secondary waste heat recovery unit (18) for tiered waste heat recovery. The waste heat recovery unit is fed with demineralized water for heat exchange, and produces 0.3MPa steam, primary waste heat and secondary waste heat respectively, which are returned to the production system for recycling.

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