Liquid sulfur transfer filtration apparatus and method

Abstract

The application discloses a liquid sulfur conveying and filtering device and method, wherein the liquid sulfur conveying and filtering device comprises a shell, the shell is provided with a containing cavity, the shell is provided with a feeding pipe and a discharging pipe, a filtering assembly is arranged in the shell, the filtering assembly is located between the output end of the feeding pipe and the input end of the discharging pipe, and a cleaning assembly is arranged on the shell and used for cleaning the filtering assembly. The method comprises the following steps: obtaining the real-time flow of a flowmeter, determining the discharging state of the discharging pipe, if the real-time flow of the flowmeter is less than a preset flow, the filtering assembly is blocked, a controller controls the feeding pipe to stop feeding, the controller controls the cleaning assembly to clean the filtering assembly, and the feeding pipe and the discharging pipe are opened after the cleaning is completed. The application realizes automatic cleaning by setting the filtering assembly to intercept solid impurities and combining the cleaning assembly, solves the problems of conveying pump abrasion, pipeline blockage and production interruption caused by impurities in the liquid sulfur conveying process, improves production continuity and reduces manual maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of filtration equipment technology, and in particular to a liquid sulfur conveying and filtration device and method. Background Technology

[0002] In sulfuric acid production plants, the sulfur melting unit dissolves sulfur in steam, which is then directly pumped to the sulfuric acid production unit. During operation, the purchased sulfur often contains impurities, including scrap steel wire, nails, and bolts, which damage the impellers of the pumps. Furthermore, the subsequent sulfuric acid production system frequently experiences blockages, requiring shutdowns and large-scale labor-intensive cleaning. The high cleaning costs, frequent replacement of damaged pump parts, and frequent shutdowns for cleaning negatively impact the company's production. Summary of the Invention

[0003] This invention provides a liquid sulfur conveying and filtering device and method to solve the technical problem that sulfur contains many impurities and easily clogs the equipment.

[0004] This invention provides a liquid sulfur conveying and filtering device and method, the liquid sulfur conveying and filtering device comprising: The housing has a receiving cavity, and the housing is provided with an inlet pipe and an outlet pipe; A filter assembly is disposed inside the housing, and the filter assembly is located between the output end of the feed pipe and the input end of the discharge pipe; A cleaning component is disposed on the housing, and the cleaning component is used to clean the filter component.

[0005] In one embodiment of the present invention, the filtering assembly includes a sieve plate and a filter screen, the sieve plate being disposed within the housing, and the filter screen being disposed on the side of the sieve plate away from the feed pipe.

[0006] In one embodiment of the present invention, the cleaning component includes a first pipe and a second pipe disposed on the housing, the first pipe and the second pipe being located on both sides of the filter component, respectively.

[0007] In one embodiment of the present invention, the first pipe is provided with an air interface and a steam interface connected in parallel, an air valve is provided between the first pipe and the air interface, and a steam valve is provided between the first pipe and the steam interface.

[0008] In one embodiment of the present invention, a condensate recovery device and a gas recovery device are provided in parallel on the second pipeline. A condensate recovery valve is provided between the condensate recovery device and the second pipeline, and a gas recovery valve is provided between the gas recovery device and the second pipeline.

[0009] In one embodiment of the present invention, the liquid sulfur conveying and filtering device further includes a controller, a feed valve is provided on the feed pipe, a discharge valve is provided on the discharge pipe, and a flow meter is provided on the discharge pipe. The flow meter, the feed valve, and the discharge valve are electrically connected to the controller.

[0010] In one embodiment of the present invention, the discharge pipe is equipped with a liquid sulfur transfer pump, and the liquid sulfur transfer pump is electrically connected to the controller.

[0011] The present invention also provides a liquid sulfur conveying and filtration method, wherein the liquid sulfur conveying and filtration device and method include: The real-time flow rate of the flow meter is obtained, and the discharge status of the discharge pipe is determined by comparing the real-time flow rate of the flow meter with the preset flow rate. If the real-time flow rate of the flow meter is less than the preset flow rate, the filter component is blocked; Once the material inside the housing is emptied, the controller stops the feeding pipe and controls the cleaning component to clean the filter component. After the filter components are cleaned, open the feed pipe and the discharge pipe.

[0012] In one embodiment of the present invention, the material inside the housing is emptied, the controller controls the feed pipe to stop feeding, and the controller controls the cleaning component to clean the filter component, including: The controller controls the air interface and air valve on the first pipe to open, allowing air to enter the housing; The controller controls the gas recovery unit and gas recovery valve on the second pipeline to open, recovering the gas inside the housing; The air inlet and air recirculation device will be shut off after a preset time.

[0013] In one embodiment of the present invention, the material inside the housing is emptied, the controller controls the feed pipe to stop feeding, and the controller controls the cleaning component to clean the filter component, further comprising: The controller opens the steam interface and steam valve on the first pipeline to introduce low-pressure steam into the shell. The controller controls the condensate recovery unit and condensate recovery valve on the second pipeline to open and recover the condensate in the housing. The steam inlet and condensate recovery unit are shut off after a preset time.

[0014] The beneficial effects of the present invention: The liquid sulfur conveying and filtering device and method proposed in this invention intercepts solid impurities by setting up a filtering component and achieves automatic cleaning by combining it with a cleaning component. This effectively solves the problems of pump wear, pipeline blockage and production interruption caused by impurities during liquid sulfur conveying, and has the advantages of improving production continuity and reducing manual maintenance costs. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0016] In the attached diagram: Figure 1 This is a schematic diagram of a structure provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of a process provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of a process provided in one embodiment of the present invention.

[0017] The attached figures are labeled as follows: 1. Housing 101, accommodating cavity 101, first connecting hole 2, feed pipe 3, feed valve 4, third connecting hole 5, first pipeline 6, air interface 7, air valve 8, steam interface 9, steam valve 10, second connecting hole 11, liquid sulfur transfer pump 12, discharge pipe 13, discharge valve 14, second pipeline 15, condensate recovery unit 16, condensate recovery valve 17, gas recovery unit 18, gas recovery valve 19, sieve plate 20, filter screen 21. Detailed Implementation

[0018] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0019] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0020] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0021] Before describing the present invention, its application is described in order to better understand the present solution.

[0022] During the liquid sulfur transportation process, solid impurities mixed in with the raw sulfur, including hard foreign objects such as waste steel wire, nails and bolts, enter the transportation system with the liquid sulfur flow, causing mechanical damage to the impeller of the transportation pump, and at the same time causing blockage of the pipelines and equipment of the sulfuric acid production system.

[0023] For example, in the operation of a sulfur melting unit in a chemical plant, the purchased sulfur raw material contains metallic impurities. When the liquid sulfur is dissolved by steam and enters the conveying pump through the feed pipe 3, foreign objects such as steel wires become stuck in the impeller gap, causing scratches on the impeller surface and disrupting the dynamic balance. The impurities flow with the liquid sulfur to the sulfuric acid production system, accumulating at the reactor inlet and forming a blockage, interrupting the production process and requiring manual cleaning. Furthermore, the presence of impurities accelerates the wear of critical equipment, increases the frequency of production interruptions, and affects the stability of process parameters.

[0024] If the above problems are not resolved, mechanical damage to the transfer pumps will worsen, pump body seal failure or shaft system malfunction may occur, and the risk of liquid sulfur leakage will increase; the blockage in the sulfuric acid production system will continue to deteriorate, the reaction process will be interrupted, catalyst deactivation and equipment corrosion will intensify, the reliability of the production unit will decrease, maintenance costs will increase, and normal production and operation will be constrained.

[0025] like Figures 1-3 As shown, the present invention provides a liquid sulfur conveying and filtering device and method.

[0026] In an exemplary embodiment, the liquid sulfur conveying and filtering device includes: a housing 1, the housing 1 having a receiving cavity 101, the housing 1 having an inlet pipe 3 and an outlet pipe 13; a filter assembly, disposed inside the housing 1, the filter assembly being located between the output end of the inlet pipe 3 and the input end of the outlet pipe 13; and a cleaning assembly, disposed on the housing 1, the cleaning assembly being used to clean the filter assembly.

[0027] In this embodiment, impurities during liquid sulfur transport often lead to equipment damage and system blockage. The housing 1 is provided with a containment cavity 101. In practical applications, the containment cavity 101 refers to the enclosed space formed within the housing 1 for the flow of liquid sulfur. It can be implemented as a cylindrical chamber, a rectangular chamber, or other geometrically shaped welded metal cavity, such as a sealed chamber welded from stainless steel plates. It is mainly used to contain liquid sulfur and provide a flow path from the inlet pipe 3 to the outlet pipe 13.

[0028] Meanwhile, the filter assembly is housed within the casing 1, located between the output end of the feed pipe 3 and the input end of the discharge pipe 13. In practical applications, the filter assembly refers to an impurity interception device located along the liquid sulfur flow path. It can be implemented as a fixed metal filter screen 21, a replaceable filter element, or a cyclone separator, such as a stainless steel woven mesh or a porous ceramic plate, mainly used for the physical interception of hard impurities such as steel wire and nails in sulfur. Therefore, a cleaning assembly is installed on the casing 1 to clean the filter assembly. Specifically, the cleaning assembly refers to a mechanism for removing impurities from the surface of the filter assembly. It can be implemented as a mechanical scraper, a high-pressure gas injection system, or a vibration device, such as a pneumatic rotary brush or a pulse backflushing device, mainly used to automatically remove accumulated impurities to restore the filtration function. This application, by precisely arranging the filter assembly between the output end of the feed pipe 3 and the input end of the discharge pipe 13, and integrating an automatic operation mechanism for the cleaning assembly, achieves continuous interception of impurities in liquid sulfur and automatic maintenance of the filtration function, avoiding damage to the conveying pump impeller and blockage of the sulfuric acid production system.

[0029] For example, in this embodiment, the housing 1 is provided with a first connection hole 2 and a second connection hole 11, wherein the feed pipe 3 is connected to the first connection hole 2 and the discharge pipe 13 is connected to the second connection hole 11, and a sealing structure is provided at the connection.

[0030] It is worth noting that after liquid sulfur enters the receiving cavity 101 of the housing 1 through the feed pipe 3, it flows along a preset path within the receiving cavity 101 and passes through a filter assembly. The filter assembly is positioned between the output end of the feed pipe 3 and the input end of the discharge pipe 13, ensuring that the liquid sulfur must pass through the filter assembly before entering the discharge pipe 13. This forcibly intercepts hard impurities such as steel wire and nails mixed in with the sulfur. The filtered liquid sulfur is then discharged to the downstream conveying system through the discharge pipe 13. When the flow capacity of the filter assembly decreases due to impurity accumulation, a cleaning assembly is activated to clean the filter assembly and restore its filtration function. Therefore, this application can continuously and effectively intercept solid impurities in the liquid sulfur, preventing these impurities from entering the conveying pump and causing impeller damage or blockage of the sulfuric acid production system. Simultaneously, the automatic cleaning mechanism eliminates the need for manual shutdown cleaning, ensuring the continuous and stable operation of the liquid sulfur conveying process.

[0031] In one exemplary embodiment, the filter assembly includes a sieve plate 20 and a filter screen 21. The sieve plate 20 is disposed inside the housing 1, and the filter screen 21 is disposed on the side of the sieve plate 20 away from the feed pipe 3.

[0032] In this embodiment, the sieve plate 20 is a coarse filtration structure used to intercept large particulate impurities. It can be implemented using structures such as metal grids, perforated plates, or welded steel bar arrays. Its purpose is to initially block large, hard impurities such as waste steel wires and nails, preventing them from directly impacting subsequent components. In a specific embodiment, the sieve plate 20 is made of 304 stainless steel, which has high strength and is not easily damaged. The filter screen 21 is a mesh element used for fine filtration. It can be implemented using materials such as PE filter plates, filter cloth, or sintered metal mesh. Its purpose is to capture smaller particulate impurities and ensure the purity of liquid sulfur.

[0033] For example, in this embodiment, after liquid sulfur enters the housing 1 from the feed pipe 3, it first flows through the screen plate 20, where large particles of impurities are effectively intercepted and retained on the feed side. Subsequently, the liquid sulfur, after preliminary filtration, flows through the filter screen 21, where small particles of impurities are captured. This sequential arrangement of the screen plate 20 at the feed end and the filter screen 21 at the discharge end allows the screen plate 20 to act as a primary barrier to perform the task of filtering large particles, significantly reducing the clogging load on the filter screen 21. This extends the overall service life of the filter assembly and ensures the continuity of the liquid sulfur conveying process and the safety of the equipment.

[0034] In an exemplary embodiment, the cleaning assembly includes a first pipe 6 and a second pipe 15 disposed on the housing 1, the first pipe 6 and the second pipe 15 being located on opposite sides of the filter assembly.

[0035] In this embodiment, the first pipe 6 is a channel for introducing the flushing medium, which can be implemented using a high-temperature resistant metal pipe or an engineering plastic pipe, with the purpose of providing flushing fluid power from one side of the filter assembly; the second pipe 15 is a channel for discharging the flushing medium, which is made of the same or different material as the first pipe 6, with the purpose of collecting and discharging the flushed fluid from the other side of the filter assembly.

[0036] For example, in this embodiment, the housing 1 is provided with a third connecting hole 5 and a fourth connecting hole, wherein the third connecting hole 5 is connected to the first pipe 6 and the fourth connecting hole is connected to the second pipe 15, and a sealing structure is provided at the connection.

[0037] Specifically, this application arranges the first pipe 6 and the second pipe 15 on both sides of the filter assembly, allowing the flushing medium to be injected and discharged simultaneously or alternately from the upstream and downstream sides of the filter assembly, forming a bidirectional flushing flow field. This effectively eliminates the flushing dead zones caused by hydrodynamic effects during unidirectional flushing, ensuring that impurities are uniformly flushed and discharged with the fluid, thereby achieving thorough cleaning of the filter assembly. At the same time, the integrated design of the pipes and the shell 1 confines the flushing process within a closed system, not only preventing the risk of liquid sulfur leakage but also facilitating connection with an external recovery system, thus achieving automated control of the cleaning process.

[0038] In an exemplary embodiment, the first pipe 6 is provided with an air interface 7 and a steam interface 9 connected in parallel, an air valve 8 is provided between the first pipe 6 and the air interface 7, and a steam valve 10 is provided between the first pipe 6 and the steam interface 9.

[0039] In this embodiment, a closed-loop control system for media switching is constructed through a combination of parallel interfaces and independent valves. The air interface 7 and steam interface 9 connected in parallel on the first pipeline 6 form a dual-media input channel. Air valve 8 and steam valve 10 independently control the on / off state of their respective media. When the controller determines the type of blockage in the filter assembly based on flow meter feedback, if it is light fiber or particulate impurities, air valve 8 is opened to connect air interface 7, utilizing airflow impact force for rapid removal; if it is viscous sulfur residue or metal fragments, steam valve 10 is opened to connect steam interface 9, utilizing thermal softening to decompose stubborn impurities. The interlocking design of the two valves ensures a single media activation state, preventing media mixing from interfering with the cleaning process. Simultaneously, by precisely controlling the inflow time and flow rate, the impurity removal efficiency is optimized, reducing residue accumulation and maintaining the continuous flow capacity of the filter assembly.

[0040] For example, in this embodiment, both the air interface 7 and the steam interface 9 adopt a stainless steel flange connection structure. The air valve 8 is a normally closed solenoid valve to achieve millisecond-level response, and the steam valve 10 is a high-temperature resistant pneumatic shut-off valve to adapt to steam conditions. During the cleaning operation, when the controller detects that the real-time flow rate of the flow meter is lower than the preset threshold, it first opens the air valve 8 to introduce compressed air for pulse cleaning; if the flow rate does not return to the normal range, it automatically switches to the steam valve 10 to introduce low-pressure saturated steam for continuous cleaning. After cleaning is completed, the corresponding valves are closed simultaneously and the condensate recovery process is started.

[0041] For example, in this embodiment, the second pipeline 15 is provided with a condensate recovery device 16 and a gas recovery device 18 connected in parallel. A condensate recovery valve 17 is provided between the condensate recovery device 16 and the second pipeline 15, and a gas recovery valve 19 is provided between the gas recovery device 18 and the second pipeline 15.

[0042] In this embodiment, a condensate recovery unit 16 and a gas recovery unit 18 are connected in parallel via a second pipeline 15, and a condensate recovery valve 17 and a gas recovery valve 19 are respectively configured, allowing the corresponding recovery path to be selectively activated according to the type of medium introduced during the cleaning operation. When steam is introduced for cleaning, the condensate recovery valve 17 opens, and the condensate is directed to the condensate recovery unit 16; when air is introduced for cleaning, the gas recovery valve 19 opens, and the gas is directed to the gas recovery unit 18. This avoids the limitations of a single discharge path, ensures effective separation and recovery of the medium under different cleaning conditions, thereby improving the system's adaptability and operational safety, and also enhancing the cleaning effect on the internal cavity 101 of the housing 1 and the filter assembly.

[0043] For example, in this embodiment, during the air cleaning stage, the controller controls the air valve 8 to open and allow air to enter, while the gas recovery valve 19 opens, and the gas flows into the gas recovery unit 18 through the second pipe 15; during the steam cleaning stage, the controller controls the steam valve 10 to open and allow low-pressure steam to enter the housing 1, while the condensate recovery valve 17 opens, and the condensate flows into the condensate recovery unit 16 through the second pipe 15.

[0044] For example, in this embodiment, the condensate recovery unit 16 uses a stainless steel storage tank to collect condensate, and the gas recovery unit 18 uses an activated carbon filter to process the gas.

[0045] In an exemplary embodiment, the liquid sulfur conveying and filtering device further includes a controller, a feed valve 4 is provided on the feed pipe 3, a discharge valve 14 is provided on the discharge pipe 13, and a flow meter is provided on the discharge pipe 13. The flow meter, feed valve 4, and discharge valve 14 are electrically connected to the controller.

[0046] In this embodiment, a flow meter continuously collects real-time flow data from the discharge pipe 13 and transmits the data to the controller. The controller compares and analyzes the real-time flow with a preset flow threshold. When the real-time flow is detected to be lower than the preset value, it determines that the filter component is blocked. Subsequently, the controller automatically closes the feed valve 4 to interrupt the feeding process and simultaneously opens the discharge valve 14 to empty the residual material in the housing 1, creating safe conditions for the cleaning operation. After the material is emptied, the controller triggers the cleaning component to execute the cleaning process. After the cleaning is completed, the controller coordinates the opening of the feed valve 4 and the discharge valve 14 to resume the conveying operation. This achieves closed-loop control from blockage detection and process interruption to cleaning execution. The components are connected by electrical signals to form an organic whole, ensuring that the flow monitoring data can drive the valve action sequence in real time, avoiding the delay and subjectivity of manual intervention.

[0047] For example, in this embodiment, the controller adopts an industrial-grade PLC module. Its input port is connected to the signal output terminal of the electromagnetic flowmeter, and its output port is connected to the solenoid valve on the feed pipe 3 and the electric ball valve on the discharge pipe 13, respectively. The electromagnetic flowmeter is installed on the straight section of the discharge pipe 13 to obtain a stable flow signal. When the system is running, the PLC periodically reads the flowmeter data and compares it with the preset threshold in the memory. If the sampled values ​​are all lower than the threshold for three consecutive times, the PLC outputs a control signal to close the feed solenoid valve and open the discharge electric ball valve. After the housing 1 is emptied, the cleaning component is automatically started. After cleaning is completed, the PLC resets the status of each valve and restores the production process.

[0048] It is worth noting that the discharge pipe 13 is equipped with a liquid sulfur transfer pump 12, which is electrically connected to the controller. By electrically connecting the liquid sulfur transfer pump 12 to the controller, and combining the real-time data feedback from the flow meter, the controller can continuously monitor the flow status of the discharge pipe 13. When the real-time flow of the flow meter is detected to be lower than a preset threshold, the controller immediately cuts off the power to the liquid sulfur transfer pump 12 and stops its operation, thereby interrupting the forced transfer process of liquid sulfur after the filter assembly becomes clogged. This avoids the continuous impact of hard impurities on the pump impeller, and at the same time forms a linkage control system with the feed valve 4, discharge valve 14, and flow meter to ensure a rapid response under clogging conditions and effectively block the continuous action of the damage source.

[0049] This invention also discloses a liquid sulfur conveying and filtration method, comprising the following steps: S100: Obtain the real-time flow rate of the flow meter, and determine the discharge status of the discharge pipe 13 by comparing the real-time flow rate of the flow meter with the preset flow rate. S200: If the real-time flow rate of the flow meter is less than the preset flow rate, the filter component will be blocked. S300: When the material inside the housing 1 is emptied, the controller controls the feed pipe 3 to stop feeding, and the controller controls the cleaning component to clean the filter component; S400: After the filter assembly is cleaned, open the feed pipe 3 and the discharge pipe 13.

[0050] In this embodiment, by comparing the real-time flow rate of the flow meter with the preset flow rate, the clogging status of the filter component can be objectively determined based on the change in fluid resistance, thereby achieving accurate identification in the early stage of clogging and avoiding delayed judgment caused by manual observation. After the material in the housing 1 is emptied, the feeding pipe 3 is automatically triggered to stop feeding and the cleaning component starts operation, ensuring that the cleaning process is performed in a state without material residue, effectively preventing the risk of liquid sulfur leakage and improving cleaning efficiency. After the cleaning is completed, the system automatically restores the flow of the feeding pipe 3 and the discharge pipe 13, significantly shortening the downtime interval.

[0051] It is worth noting that this application replaces the traditional manual intervention mode with an automated flow monitoring and response mechanism, effectively solving the problem of frequent shutdowns and manual cleaning caused by filter component blockage due to sulfur impurities, ensuring the continuous and stable operation of the liquid sulfur transportation process, while reducing the risk of equipment damage and maintenance costs.

[0052] In an exemplary embodiment, after the material inside the housing 1 is emptied, the controller controls the feed pipe 3 to stop feeding, and the controller controls the cleaning assembly to clean the filter assembly, including: S310: The controller controls the air interface 7 and air valve 8 on the first pipe 6 to open, so as to introduce air into the housing 1; S320: The controller controls the gas recovery device 18 and gas recovery valve 19 on the second pipeline 15 to open and recover the gas in the housing 1; S330: After a preset time, shut off air inlet 7 and air recirculation unit.

[0053] In this embodiment, by first completely emptying the material in the shell 1 and then stopping the feeding, the interference of residual liquid sulfur on the cleaning process is avoided; then the controller synchronously controls the opening of the air interface 7 and the air valve 8 to introduce air into the shell 1, and at the same time controls the opening of the gas recovery device 18 and the gas recovery valve 19 to recover the gas in the shell 1, so that the purging and recovery actions are coordinated, effectively capturing and preventing the escape of harmful gases.

[0054] In this implementation, the air interface 7 and the air recirculator are shut off after a preset time to precisely control the cleaning time, ensuring that the blockage is fully removed while avoiding resource waste caused by excessive ventilation.

[0055] In an exemplary embodiment, after the material inside the housing 1 is emptied, the controller controls the feed pipe 3 to stop feeding, and the controller controls the cleaning assembly to clean the filter assembly, the process further includes: S340: The controller controls the steam interface 9 and steam valve 10 on the first pipeline 6 to open, so as to introduce low-pressure steam into the housing 1; S350: The controller controls the condensate recovery device 16 and the condensate recovery valve 17 on the second pipeline 15 to open and recover the condensate in the housing 1; S360: Closes the steam inlet 9 and the condensate recovery unit 16 after a preset time.

[0056] In this embodiment, the timing of steam cleaning and condensate recovery is coordinated by the controller. Feeding is stopped immediately after the material in the shell 1 is emptied, and the steam cleaning process is then initiated: the controller opens the steam interface 9 and steam valve 10 on the first pipe 6, introducing low-pressure steam into the shell 1. The steam's thermal energy melts the solidified sulfur on the surface and in the gaps of the filter screen 21 into a liquid state. Simultaneously, the controller opens the condensate recovery device 16 and condensate recovery valve 17 on the second pipe 15, guiding the condensate flow to the recovery path in real time to prevent liquid sulfur from accumulating and re-solidifying in the shell 1. After a preset time, the steam interface 9 and condensate recovery device 16 are closed synchronously to ensure that sulfur residue is completely removed and to avoid overheating that could damage the equipment. This combination of thermal softening and dynamic removal effectively solves the technical bottleneck of difficult-to-remove solidified sulfur residue.

[0057] In summary, this invention effectively solves the problems of pump wear, pipeline blockage, and production interruption caused by impurities during liquid sulfur transportation by setting up a filter component to intercept solid impurities and combining it with a cleaning component to achieve automatic cleaning. It has the advantages of improving production continuity and reducing manual maintenance costs.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A liquid sulfur conveying and filtering device, characterized in that, include: The housing has a receiving cavity, and the housing is provided with an inlet pipe and an outlet pipe; A filter assembly is disposed inside the housing, and the filter assembly is located between the output end of the feed pipe and the input end of the discharge pipe; A cleaning component is disposed on the housing, and the cleaning component is used to clean the filter component.

2. The liquid sulfur conveying and filtering device according to claim 1, characterized in that: The filtration assembly includes a sieve plate and a filter screen. The sieve plate is disposed inside the housing, and the filter screen is disposed on the side of the sieve plate away from the feed pipe.

3. The liquid sulfur conveying and filtering device according to claim 1, characterized in that: The cleaning assembly includes a first pipe and a second pipe disposed on the housing, the first pipe and the second pipe being located on opposite sides of the filter assembly, respectively.

4. The liquid sulfur conveying and filtering device according to claim 3, characterized in that: The first pipe is provided with an air inlet and a steam inlet connected in parallel. An air valve is provided between the first pipe and the air inlet, and a steam valve is provided between the first pipe and the steam inlet.

5. The liquid sulfur conveying and filtering device according to claim 3, characterized in that: The second pipeline is equipped with a condensate recovery unit and a gas recovery unit in parallel. A condensate recovery valve is provided between the condensate recovery unit and the second pipeline, and a gas recovery valve is provided between the gas recovery unit and the second pipeline.

6. The liquid sulfur conveying and filtering device according to claim 1, characterized in that: The liquid sulfur conveying and filtering device also includes a controller, a feed valve on the feed pipe, a discharge valve on the discharge pipe, and a flow meter on the discharge pipe. The flow meter, feed valve, and discharge valve are electrically connected to the controller.

7. The liquid sulfur conveying and filtering device according to claim 6, characterized in that: The discharge pipe is equipped with a liquid sulfur transfer pump, which is electrically connected to the controller.

8. A liquid sulfur conveying and filtering method, employing the liquid sulfur conveying and filtering device as described in any one of claims 1-7, characterized in that: The real-time flow rate of the flow meter is obtained, and the discharge status of the discharge pipe is determined by comparing the real-time flow rate of the flow meter with the preset flow rate. If the real-time flow rate of the flow meter is less than the preset flow rate, the filter component is blocked; Once the material inside the housing is emptied, the controller stops the feeding pipe and controls the cleaning component to clean the filter component. After the filter components are cleaned, open the feed pipe and the discharge pipe.

9. The liquid sulfur conveying and filtration method according to claim 8, characterized in that: The material inside the housing is emptied, the controller controls the feed pipe to stop feeding, and the controller controls the cleaning component to clean the filter component, including: The controller controls the air interface and air valve on the first pipe to open, allowing air to enter the housing; The controller controls the gas recovery unit and gas recovery valve on the second pipeline to open, recovering the gas inside the housing; The air inlet and air recirculation device will be shut off after a preset time.

10. The liquid sulfur conveying and filtration method according to claim 9, characterized in that: The process of emptying the material from the housing, stopping the feed pipe, and controlling the cleaning assembly to clean the filter assembly also includes: The controller opens the steam interface and steam valve on the first pipeline to introduce low-pressure steam into the shell. The controller controls the condensate recovery unit and condensate recovery valve on the second pipeline to open and recover the condensate in the housing. The steam inlet and condensate recovery unit are shut off after a preset time.

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