A sulfur recovery device and a method for cleaning the blockage.

Abstract

The present application provides a kind of sulphur recovery equipment, it includes: desulfurization tower, for carrying out oxidation-reduction reaction to sulfur-containing flue gas, obtain sulfur element vapor;Sulfur condenser, for sulfur element vapor condensation, to form sulfur element solid and desulfurization gas;Sulfur transfer pipeline is used to connect desulfurization tower and sulfur condenser, include multiple pipeline heater and multiple block monitoring module;Host computer receives pipeline heater and block monitoring module feedback sulfur transfer pipeline block condition, after analyzing block condition, issue block cleaning instruction to pipeline heater.The present application can accurately locate the position of block, not only can obtain the distribution of sulfur monomer accumulation in the axial direction of pipeline, but also can obtain the distribution of sulfur monomer accumulation in the circumferential direction;Also can clean the block in the corresponding position, improve the effect of cleaning the block of pipeline.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sulfur recovery equipment, in particular to a sulfur recovery equipment and a method for cleaning the blockage of the equipment. BACKGROUND

[0002] With the rapid development of modern industry, the emission of sulfur dioxide flue gas has increased dramatically. After the combustion of energy fuels such as coal and natural gas, a certain amount of sulfur dioxide is usually generated. Sulfur dioxide is one of the main atmospheric pollutants, causing atmospheric environmental pollution such as acid rain, haze, and serious waste of sulfur resources.

[0003] The gas after the combustion of natural gas and coal is subjected to desulfurization treatment and sulfur recovery. Sulfur recovery of combustion flue gas not only reduces the pollution of sulfur dioxide, but also recovers a large amount of sulfur resources. Sulfur is easy to store, convenient to transport, and has high added value. It can also be used as a chemical raw material, bringing certain benefits to enterprises, and has good environmental and economic benefits.

[0004] The current method for sulfur recovery of sulfur dioxide flue gas is usually solid reducing agent direct reduction method. The solid reducing agent direct reduction method refers to passing the flue gas containing sulfur dioxide through a solid reducing agent (such as calcium sulfide, oxygen-deficient magnetite ore, and coke) with reducing property at a certain temperature (200-300℃), so that the oxygen atoms in the sulfur dioxide are transferred to the solid reducing agent, thereby realizing the reduction of sulfur dioxide, and the solid reducing agent is oxidized. The oxidized solid reducing agent can be regenerated. This reduction method divides the reduction process into two steps, increasing the controllability of the operation, and the solid reducing agent is renewable, without secondary pollution, with high selectivity, and has good development prospects.

[0005] Reference Figure 1 , the solid reducing agent direct reduction method for sulfur recovery in the prior art. As shown in Figure 1 , the gas containing sulfur dioxide is introduced into a fluidized bed or packed bed of calcium sulfide to react with it to generate calcium sulfate, release sulfur vapor, and condense the sulfur vapor to form elemental sulfur. The calcium sulfate is reduced to calcium sulfide by coke-reformed natural gas, and the calcium sulfide is recycled for reaction. However, the main problem of the above method is that the generated sulfur vapor will adhere to the inner surface of the pipeline during the transfer to the sulfur condenser, causing blockage of the pipeline. The existing cleaning method is usually to heat or steam clean the entire pipeline, but it cannot obtain the accumulation of sulfur in the pipeline, cannot focus on cleaning the seriously accumulated parts, and cannot determine the cleaning result in time, resulting in less than expected cleaning effect.

[0006] In view of the problems in the prior art, the present application provides a sulfur recovery equipment and a method for cleaning the blockage of the equipment. SUMMARY

[0007] In existing sulfur recovery processes using direct reduction with solid reducing agents, sulfur vapor adheres to the inner surface of the pipes during its transfer to the sulfur condenser, causing blockages. To address these shortcomings, this invention provides a sulfur recovery device comprising:

[0008] A desulfurization tower is used to perform an oxidation-reduction reaction on sulfur-containing flue gas to obtain elemental sulfur vapor.

[0009] A sulfur condenser for condensing the sulfur vapor to form sulfur solid and desulfurized gas;

[0010] A sulfur transfer pipeline, used to connect the desulfurization tower and the sulfur condenser, includes multiple pipeline heaters and multiple blockage monitoring modules;

[0011] The host computer receives feedback from the pipeline heater and the blockage monitoring module regarding the blockage status of the sulfur transfer pipeline. After analyzing the blockage status, it issues a blockage clearing command to the pipeline heater.

[0012] According to one embodiment of the present invention, a plurality of pipe heaters are arranged at equal intervals along the axial direction on the outside of the sulfur transfer pipe, and a plurality of blockage monitoring modules are respectively arranged at positions corresponding to the plurality of pipe heaters inside the sulfur transfer pipe.

[0013] According to one embodiment of the present invention, the inner and outer surfaces of the pipeline heater are both insulating and heat-conducting fabrics, and a heating element and a control module are sandwiched between the inner and outer layers of the insulating and heat-conducting fabrics. The heating element is annular and tightly wrapped around the outer surface of the sulfur transfer pipeline.

[0014] According to one embodiment of the present invention, at least one temperature sensor is provided on the surface of the pipeline heater near the sulfur transfer pipeline, and both the temperature sensor and the heating element are connected to the control module, which is connected to the host computer.

[0015] According to one embodiment of the present invention, in the circumferential direction of the sulfur transfer pipeline, the positions of adjacent blockage monitoring modules are offset from 1 / 4 of the circumference.

[0016] According to one embodiment of the present invention, the blockage monitoring module includes a semi-circular base and a first electrode and a second electrode disposed on the base, wherein the first electrode and the second electrode are a pair of dressing electrodes.

[0017] According to one embodiment of the present invention, the base includes:

[0018] The thermally conductive layer is a sheet material made of thermally conductive material;

[0019] The heat insulation layer is disposed in a groove on the upper surface of the heat-conducting layer and is made of heat insulation material;

[0020] A functional module, which is disposed on the upper surface of the insulation layer, is used to transmit the capacitance value between the first electrode and the second electrode to the host computer.

[0021] A porous thermally conductive ceramic surface layer is disposed on the upper surface of the thermally conductive layer, which has insulating and thermally conductive properties, and includes multiple through holes for connecting the functional module with the first electrode and the second electrode.

[0022] According to one embodiment of the present invention, the sulfur recovery equipment comprises:

[0023] An oxidizer is used to oxidize the mixture of calcium sulfide and calcium sulfate output from the desulfurization tower to form a dusty, fully oxidized solid reducing agent, calcium sulfate.

[0024] A rotary separator is used to rotary separate the powdery, fully oxidized solid reducing agent calcium sulfate and discharge the gas after rotary separation.

[0025] The regeneration tower is used to reduce the powdery, fully oxidized solid reducing agent calcium sulfate to calcium sulfide using natural gas reformed from coal and steam, and then feed it into the desulfurization tower for oxidation-reduction reaction.

[0026] According to another aspect of the present invention, a method for cleaning blockages in a sulfur recovery device is also provided, wherein the method comprises:

[0027] S1. Collect real-time capacitance measurement values ​​fed back by multiple blockage monitoring modules through the host computer to determine the real-time thickness of elemental sulfur;

[0028] S2. Based on the real-time thickness of the sulfur element, the sulfur element thickness distribution in the axial and circumferential directions of the sulfur transfer pipeline is obtained through the host computer.

[0029] S3. Based on the sulfur element thickness distribution, the host computer selectively issues blockage clearing commands to multiple pipe heaters;

[0030] S4. Real-time detection of the sulfur film thickness fed back by the blockage monitoring module. When the thickness is less than or equal to a preset threshold, stop heating the pipe heater at the corresponding position of the blockage monitoring module.

[0031] According to another aspect of the invention, a storage medium is also provided, which includes a series of instructions for performing the steps of the method described in any of the preceding claims.

[0032] The present invention provides a sulfur recovery device and a method for cleaning blockages in the device, which can accurately locate the blockage location and obtain the distribution of sulfur monomer accumulation not only in the axial direction of the pipeline, but also in the circumferential direction. The present invention can also clean the blockage at the corresponding location, thereby improving the effect of cleaning pipeline blockages.

[0033] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0034] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0035] Figure 1 A schematic diagram of a device for sulfur recovery using a solid reducing agent direct reduction method in the prior art is shown.

[0036] Figure 2 A schematic diagram of a sulfur recovery device according to an embodiment of the present invention is shown;

[0037] Figure 3 A schematic diagram of the external structure of a sulfur transfer pipeline between a desulfurization tower and a sulfur condenser according to an embodiment of the present invention is shown.

[0038] Figure 4 A schematic cross-sectional view of a sulfur transfer pipeline between a desulfurization tower and a sulfur condenser according to an embodiment of the present invention is shown along the AA direction;

[0039] Figure 5 A perspective view of a blockage monitoring module according to an embodiment of the present invention is shown;

[0040] Figure 6 A schematic diagram of the electrode arrangement of a blockage monitoring module according to an embodiment of the present invention is shown;

[0041] Figure 7 A cross-sectional schematic diagram of a blockage monitoring module according to an embodiment of the present invention is shown;

[0042] Figure 8 A flowchart of a method for cleaning blockages in a sulfur recovery device according to an embodiment of the present invention is shown;

[0043] Figure 9The diagram shows the thickness distribution of elemental sulfur in the axial and circumferential directions of a sulfur transfer pipe according to an embodiment of the present invention.

[0044] In the accompanying drawings, the same parts use the same reference numerals. Also, the drawings are not drawn to scale.

[0045] The meanings of the reference numerals in the attached figures are as follows: 1-Sulfur transfer pipe; 2-Base; 3-First electrode; 4-Second electrode; 5-Circuit connection structure; 6-Porous thermally conductive ceramic surface layer; 7-Functional module; 8-Heat-conducting layer; 9-Insulation layer. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the beneficial effects of the invention. Therefore, the following description should be understood as being of broad knowledge to those skilled in the art and is not intended to limit the present invention.

[0047] For clarity, not all features of the actual embodiments are described. In the following description, well-known functions and structures are not detailed in detail, as they would confuse the invention with unnecessary detail. It should be understood that in the development of any actual embodiment, numerous implementation details must be made to achieve the developer's specific objectives.

[0048] To make the objectives and features of the present invention more apparent and understandable, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, intended only to facilitate and clearly illustrate the objectives of the embodiments of the present invention.

[0049] Figure 2 A schematic diagram of a sulfur recovery device according to an embodiment of the present invention is shown.

[0050] like Figure 2 As shown, the sulfur recovery equipment includes: a desulfurization tower, a sulfur condenser, a sulfur transfer pipeline, a host computer, an oxidizer, a rotary separator, a regeneration tower, and a steam generator.

[0051] like Figure 2 As shown, the desulfurization tower is used to perform an oxidation-reduction reaction on sulfur-containing flue gas to obtain elemental sulfur vapor. Specifically, sulfur-containing flue gas is introduced into the inlet of the desulfurization tower, where it undergoes a reduction reaction with the solid reducing agent calcium sulfide to form elemental sulfur (sulfur) vapor.

[0052] like Figure 2As shown, the sulfur condenser is used to condense elemental sulfur vapor to form elemental sulfur solid and desulfurized gas. Specifically, elemental sulfur vapor flows into the sulfur condenser through a sulfur transfer pipe, and after being condensed by the sulfur condenser, it forms elemental sulfur solid and desulfurized gas respectively.

[0053] like Figure 2 As shown, the sulfur transfer pipeline connects the desulfurization tower and the sulfur condenser, and includes multiple pipeline heaters and multiple blockage monitoring modules. In one embodiment, as... Figure 2 As shown, multiple pipe heaters are installed at equal intervals along the axial direction on the outside of the sulfur transfer pipe, and multiple blockage monitoring modules are installed at positions corresponding to the multiple pipe heaters inside the sulfur transfer pipe.

[0054] like Figure 2 As shown, the host computer receives feedback from the pipeline heater and the blockage monitoring module regarding the blockage status of the sulfur transfer pipeline. After analyzing the blockage status, it issues a blockage clearing command to the pipeline heater.

[0055] like Figure 2 As shown, the oxidizer is used to oxidize the mixture of calcium sulfide and calcium sulfate output from the desulfurization tower, forming a powdery, fully oxidized solid reducing agent, calcium sulfate. Specifically, the solid reducing agent calcium sulfide, after undergoing a redox reaction in the desulfurization tower, is at least partially oxidized to calcium sulfate, forming a mixture of calcium sulfide and calcium sulfate. This mixture of calcium sulfide and calcium sulfate enters the oxidizer and is further oxidized by hot air, forming a powdery, fully oxidized solid reducing agent, calcium sulfate.

[0056] like Figure 2 As shown, the rotary separator is used to perform rotary separation of the fully oxidized solid reducing agent calcium sulfate in powder form, and to discharge the gas after rotary separation. Specifically, the fully oxidized solid reducing agent calcium sulfate enters the rotary separator for rotary separation, and the fully oxidized solid reducing agent calcium sulfate sinks to the regeneration tower, while the gas separated by rotary separation is discharged into the atmosphere.

[0057] like Figure 3 As shown, the regeneration tower reduces the powdered, fully oxidized solid reducing agent calcium sulfate to calcium sulfide using natural gas reformed with coal and steam, and then sends it to the desulfurization tower for a redox reaction. Specifically, the powdered, fully oxidized solid reducing agent calcium sulfate entering the regeneration tower is reduced to calcium sulfide using natural gas reformed with coal and steam, and then enters the desulfurization tower for a redox reaction. Further, steam is generated by a steam generator, and one of the steam output ports of the steam generator is connected to the steam input port of the regeneration tower.

[0058] Figure 3A schematic diagram of the external structure of the sulfur transfer pipeline between the desulfurization tower and the sulfur condenser according to an embodiment of the present invention is shown.

[0059] like Figure 3 As shown, sulfur transfer pipe 1 is located between the desulfurization tower and the sulfur condenser. Along the axial direction outside sulfur transfer pipe 1, n pipe heaters (H1~Hn) are arranged at equal intervals. In one embodiment, this interval can be 10-30 cm.

[0060] like Figure 4 As shown, the inner and outer surfaces of the pipe heater are both made of insulating and heat-conducting fabric. The heating element and control module are sandwiched between the inner and outer layers of insulating and heat-conducting fabric. The heating element is ring-shaped and tightly wrapped around the outer surface of the sulfur transfer pipe 1. Furthermore, the heating element can be an electric heating wire or other forms of electric heating component.

[0061] In one embodiment, at least one temperature sensor is provided on the surface of the pipe heater near the sulfur transfer pipe 1. Both the temperature sensor and the heating element are connected to the control module. The control module is connected to the host computer, receives control signals (such as blockage clearing commands) from the host computer, and transmits the signals collected by the temperature sensor to the host computer.

[0062] Furthermore, the heating element in a pipe heater can be divided into 2-4 units, meaning that a pipe heater has 2-4 independently controlled electric heating components. These 2-4 units are evenly distributed throughout the entire annular pipe heater, and insulating components are installed between each pair of the 2-4 units. Temperature sensors and control components are also configured to be 2-4, each corresponding to one of the 2-4 heating element units.

[0063] Figure 4 A schematic cross-sectional view of the sulfur transfer pipeline between the desulfurization tower and the sulfur condenser according to an embodiment of the present invention is shown along the AA direction.

[0064] like Figure 4 As shown, n blockage monitoring modules (T1 to Tn) are installed inside the sulfur transfer pipe 1 at positions corresponding to the n pipe heaters (H1 to Hn). Specifically, each blockage monitoring module is shaped like a half-circle. The shape of the half-circle of the blockage monitoring module matches the shape of the inner wall of the sulfur transfer pipe 1, meaning that each blockage monitoring module can fit tightly against the inner surface of the sulfur transfer pipe 1. Furthermore, each blockage monitoring module is fixed to the inner surface of the sulfur transfer pipe 1 by means of brazing or other methods.

[0065] like Figure 5As shown, n blockage monitoring modules (T1~Tn) correspond to the positions of n pipe heaters (H1~Hn) in the axial direction of sulfur transfer pipe 1, that is, they are also arranged equidistantly along the axial direction. In the circumferential direction, adjacent blockage monitoring modules are offset by 1 / 4 of the circumference (or 90 degrees) in the same direction of the circumference. For example, the position of the second blockage monitoring module is rotated 1 / 4 of the circumference (or 90 degrees) counterclockwise relative to the first blockage monitoring module, the position of the third blockage monitoring module is rotated 1 / 4 of the circumference (or 90 degrees) counterclockwise relative to the second blockage monitoring module, and so on.

[0066] In this invention, by setting multiple equally spaced blockage monitoring modules offset in the circumferential direction, the distribution of sulfur monomer accumulation can be obtained not only in the axial direction of the sulfur transfer pipe 1, but also in the circumferential direction.

[0067] Figure 5 A perspective view of a blockage monitoring module according to an embodiment of the present invention is shown.

[0068] like Figure 6 As shown, the blockage monitoring module includes a semi-circular base 2 and a first electrode 3 and a second electrode 4 disposed on the base 2. Figure 7 As shown, the first electrode 3 and the second electrode 4 are a pair of grooming electrodes.

[0069] Figure 7 A cross-sectional schematic diagram of a blockage monitoring module according to an embodiment of the present invention is shown.

[0070] like Figure 7 As shown, the base includes: a thermally conductive layer 8, a thermal insulation layer 9, a functional module 7, and a porous thermally conductive ceramic surface layer 6.

[0071] like Figure 7 As shown, the heat-conducting layer 8 is a sheet material made of heat-conducting material. Specifically, the heat-conducting layer 8 is a sheet material made of aluminum or copper, with a thickness of about 3 cm.

[0072] like Figure 7 As shown, the heat insulation layer 9 is disposed within a groove on the upper surface of the heat-conducting layer 8 and is made of heat-insulating material. Specifically, a groove is provided on the upper surface of the heat-conducting layer 8, and the heat insulation layer 9, which is made of heat-insulating material, is disposed inside the groove.

[0073] like Figure 7As shown, functional module 7 is disposed on the upper surface of the insulation layer 9 and is used to transmit the capacitance value between the first electrode 3 and the second electrode 4 to the host computer. Specifically, functional module 7 is installed on the surface of the insulation layer 9 within a groove on the upper surface of the heat-conducting layer 8. Functional module 7 includes necessary circuit functional modules, such as power supply, capacitor bridge circuit, communication module, etc., and may also include physical retaining components such as housing and insulation layer.

[0074] like Figure 6 As shown, a porous thermally conductive ceramic surface layer 6 is disposed on the upper surface of the thermally conductive layer 8, possessing insulating and thermally conductive properties, and includes multiple through holes for connecting the functional module 6 with the first electrode 3 and the second electrode 4. Specifically, a porous thermally conductive ceramic surface layer 6 is disposed on the upper surface of the thermally conductive layer 8, and this porous thermally conductive ceramic surface layer 6 possesses insulating and thermally conductive properties. The first electrode 3 and the second electrode 4 are disposed on the surface of the porous thermally conductive ceramic surface layer 6, and the first electrode 3 and the second electrode 4 are connected to the functional module 7 through the multiple through holes disposed in the porous thermally conductive ceramic surface layer 6 via a circuit connection structure 5.

[0075] like Figure 2 As shown, the first electrode 3 and the second electrode 4 are a pair of comb electrodes. These comb electrodes have a preset shape and size, forming a planar interdigitated capacitor. In its original state, the capacitance of the interdigitated capacitor is determined by the dielectric constant of the porous thermally conductive ceramic surface layer 6. When elemental sulfur is deposited on the first electrode 3 and the second electrode 4 to form a continuous film, the capacitance of the interdigitated capacitor is determined by the spacing and thickness of the first electrode 3 and the second electrode 4, as well as the dielectric constant of elemental sulfur. The capacitance between the pair of comb electrodes can be measured using a capacitor bridge circuit. Functional module 7 transmits the capacitance value to the host computer, which calculates and determines the thickness of the elemental sulfur based on the change in capacitance.

[0076] like Figure 8 As shown, the functional module 7 of the n blockage monitoring modules (T1~Tn) is connected to the host computer. The functional module 7 transmits the capacitance value measured by the above capacitor bridge circuit to the host computer. The host computer calculates the thickness of elemental sulfur at the corresponding position and adjusts the heating status of the n pipe heaters (H1~Hn) according to the corresponding elemental sulfur thickness distribution.

[0077] In this invention, selective heating of multiple pipes to a temperature above the melting point of elemental sulfur melts the elemental sulfur on the inner wall of the sulfur transfer pipe 1, thus cleaning the pipes. Simultaneously, due to the excellent thermal conductivity of the blockage monitoring module, the heat from the pipe heating is efficiently transferred to the module, causing the elemental sulfur deposited on the sensor surface and inside the pipe to melt and be removed simultaneously. This not only cleans and zeroes the thickness measurement data of the blockage monitoring module, but also allows the progress and extent of pipe cleaning to be detected by the decrease in the thickness data of the blockage monitoring module.

[0078] Figure 8 A flowchart of a method for cleaning blockages in a sulfur recovery device according to an embodiment of the present invention is shown.

[0079] like Figure 8 As shown, in step S1, the host computer collects real-time capacitance measurements from multiple blockage monitoring modules to determine the real-time thickness of elemental sulfur. Specifically, the host computer collects real-time capacitance measurements from the capacitor bridge circuits associated with n blockage monitoring modules (T1 to Tn), and calculates the real-time thickness of elemental sulfur based on these measurements.

[0080] like Figure 9 As shown, in step S2, based on the real-time thickness of elemental sulfur, the host computer obtains the distribution of elemental sulfur thickness in the axial and circumferential directions of the sulfur transfer pipeline. Specifically, the host computer obtains the distribution of elemental sulfur thickness in the axial and circumferential directions of sulfur transfer pipeline 1 through the real-time thickness of elemental sulfur at multiple points. See [link to relevant documentation]. Figure 8 The horizontal axis represents the rotation angle in the circumferential direction (0-360 degrees, where 0 degrees is the axial side surface penetration line with the highest horizontal height of the pipe, and 90 degrees, 180 degrees, 270 degrees, and 360 degrees are the angles after the 0-degree penetration line is rotated clockwise). The vertical axis represents the pipe length, where 0 is the inlet end near the desulfurization tower and L is the outlet end near the sulfur condenser.

[0081] like Figure 9 As shown, in step S3, based on the sulfur element thickness distribution, a blockage clearing command is selectively issued to multiple pipe heaters via a host computer. Specifically, according to the sulfur element thickness distribution in the axial and circumferential directions of the sulfur transfer pipe 1, n pipe heaters (H1~Hn) are selectively adjusted to heat the pipe. By setting the temperature, the elemental sulfur blockage accumulated on the surface of the sulfur transfer pipe 1 is liquefied, thereby clearing the blockage.

[0082] In one embodiment, based on the sulfur element thickness distribution along the axial and circumferential directions of the sulfur transfer pipe 1, n pipe heaters (H1~Hn) are selectively adjusted to heat the pipe, specifically including:

[0083] Step 1) Determine whether the thickness of the elemental sulfur film at the corresponding location of the blockage monitoring module distributed along the axis of sulfur transfer pipeline 1 exceeds the first threshold V1. Specifically, V1 = D / π[2ln(L) - ln(RvT)], where D is the internal diameter of sulfur transfer pipeline 1, L is the length of sulfur transfer pipeline 1, R is the gas constant, v is the gas flow rate entering the pipeline detected by the gas flow detection device installed from the desulfurization tower to the pipeline, and T is the sulfur vapor gas temperature. All of the above parameters can be detected by a flow meter or temperature detection device installed at the location from the desulfurization tower to the pipeline.

[0084] If the judgment result is yes, the corresponding pipeline heater at the upper computer will be heated to melt the sulfur monomers and remove the deposits. The heating reference temperature of the pipeline heater at this location is T0, where T0 = N*L*(T'-T) / n*ρ+Q / C, where N is the thickness of the sulfur film at the detection location, L is the total length of sulfur transfer pipeline 1, T' is the melting point of sulfur, T is the temperature of sulfur vapor, n is the number of blockage monitoring modules, ρ is the density constant of sulfur, Q is the latent heat of fusion per unit mass (per gram), and C is the heat capacity constant of sulfur.

[0085] If the determination is negative, then the heating reference temperature T0 of the pipe heater corresponding to that location is set to 0.

[0086] Step 2), determine the half-circumferential position in the circumferential direction where the blockage monitoring module did not measure the corresponding position on the axis in Step 1), and the one or two blockage monitoring modules closest to it at the corresponding half-circumferential position where the blockage monitoring module did not measure the corresponding position in the circumferential direction (see...). Figure 8 A represents the half-circumference position in the circumferential direction where the blockage monitoring module at the corresponding position on the axis has not been measured. B or C represents the thickness of the sulfur elemental film at the corresponding half-circumferential position where the nearest one or two blockage monitoring modules have not been measured in the circumferential direction. The threshold value V2 is calculated as follows: V2 = D*n / πL[2ln(L)-ln(RvT)], where D is the internal diameter of the sulfur transfer pipe 1, L is the length of the sulfur transfer pipe 1, R is the gas constant, v is the gas flow rate entering the pipe detected by the gas flow detection device installed from the desulfurization tower to the pipe, n is the number of blockage monitoring modules, and T is the sulfur vapor gas temperature. All of the above parameters can be detected by flow meters or temperature detection devices installed at the location from the desulfurization tower to the pipe.

[0087] If the judgment result is yes, then the compensation temperature of the pipe heater at the one or two positions closest to the position corresponding to the above axis (equivalent to positions B and C) is set to TC, where TC==[N*L*(T'-T) / n*ρ+Q / C] / 2e (L / n) N represents the thickness of the sulfur film at the detection location, L represents the total length of the sulfur transfer pipeline 1, T' represents the melting point of sulfur, T represents the temperature of the sulfur vapor gas, n represents the number of blockage monitoring modules, ρ represents the density constant of sulfur, Q represents the latent heat of fusion per unit mass (per gram), and C represents the heat capacity constant of sulfur. All of the above parameters can be detected by flow meters or temperature detection devices installed between the desulfurization tower and the pipeline.

[0088] If the judgment result is negative, the compensation temperature TC of the pipe heater at the one or two positions closest to the position corresponding to the above axis (equivalent to positions B and C) will be set to 0.

[0089] Step 3): Control the n pipe heaters (H1~Hn) via the host computer, and set the heating temperature of each pipe heater to the corresponding T0+TC. Temperature feedback control is performed using the temperature sensors attached to the pipe heaters to maintain a stable heating temperature.

[0090] like ​ As shown, in step S4, the thickness of the sulfur film fed back by the blockage monitoring module is detected in real time. When the thickness is less than or equal to a preset threshold, heating of the pipe heater at the corresponding location of the blockage monitoring module is stopped. Specifically, the thickness of the sulfur film corresponding to n blockage monitoring modules (T1~Tn) is detected in real time. When the thickness is less than or equal to a third threshold V3, heating of the pipe heater at the corresponding location of the blockage monitoring module is stopped. Specifically, V3 can be 0 or V3=V1 / 4πe (RvT) Where V1 is the first threshold thickness, R is the gas constant, v is the gas flow rate entering the pipeline detected by the gas flow detection device installed at the location from the desulfurization tower to the pipeline, and T is the sulfur vapor gas temperature. All of the above parameters can be detected by a flow meter or temperature detection device installed at the location from the desulfurization tower to the pipeline.

[0091] It should be noted that the necessary parameters in this invention, such as pressure and flow rate, can be measured and controlled by installing corresponding pressure gauges or flow meters in the pipeline. For the sake of simplification, essential components in the pipeline, such as air pumps or pressure relief ports for generating or maintaining air pressure, have been omitted. However, those skilled in the art, based on their technical knowledge, can reasonably determine the location of these essential components based on the disclosure in this application.

[0092] The sulfur recovery equipment and equipment blockage removal method provided by this invention can also be used in conjunction with a computer-readable storage medium. The storage medium stores a computer program, which is executed to run the sulfur recovery equipment blockage removal method. The computer program can execute computer instructions, which include computer program code. The computer program code can be in the form of source code, object code, executable file, or some intermediate form.

[0093] Computer-readable storage media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0094] It should be noted that the contents of computer-readable storage media may be appropriately added to or subtracted from the contents according to the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media may not include electrical carrier signals and telecommunication signals.

[0095] In summary, the sulfur recovery equipment and equipment blockage removal method provided by this invention have the following advantages and beneficial effects compared with the prior art: it can accurately locate the blockage position, and can obtain the distribution of sulfur monomer accumulation not only in the axial direction of the pipeline, but also in the circumferential direction; this invention can also remove blockages at the corresponding positions, improving the effect of pipeline blockage removal.

[0096] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0097] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0098] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0099] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0100] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0101] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A sulphur recovery plant, characterized in that, The sulfur recovery device comprises: a desulfurization tower for carrying out a redox reaction on sulfur-containing flue gas to obtain sulfur element vapor; a sulfur condenser for condensing the sulfur element vapor to form sulfur element solid and desulfurization gas; a sulfur transfer pipeline for connecting the desulfurization tower and the sulfur condenser, comprising a plurality of pipeline heaters and a plurality of blockage monitoring modules; a host computer receiving feedback of blockage of the sulfur transfer pipeline from the pipeline heaters and the blockage monitoring modules, and issuing a blockage cleaning instruction to the pipeline heaters after analyzing the blockage. A plurality of pipeline heaters are arranged at equal intervals in the axial direction outside the sulfur transfer pipeline, and a plurality of blockage monitoring modules are arranged at positions corresponding to the pipeline heaters inside the sulfur transfer pipeline; in the circumferential direction of the sulfur transfer pipeline, the positions of the blockage monitoring modules are offset by 1 / 4 of the circumference between adjacent blockage monitoring modules.

2. A sulphur recovery plant according to claim 1, characterised in that, The inner and outer surfaces of the pipeline heater are both insulated heat-conducting fabric, and the inner and outer layers of the insulated heat-conducting fabric are clamped with a heating body and a control module. The heating body is annular and tightly wrapped around the outer surface of the sulfur transfer pipeline.

3. A sulphur recovery plant according to claim 2, characterised in that, At least one temperature sensor is arranged on the surface of the pipeline heater close to the sulfur transfer pipeline. The temperature sensor and the heating body are both connected to the control module, and the control module is connected to the host computer.

4. A sulphur recovery unit as claimed in claim 1, characterised in that, The blockage monitoring module comprises a semicircular base and a first electrode and a second electrode arranged on the base. The first electrode and the second electrode are a pair of comb electrodes.

5. A sulphur recovery unit as claimed in claim 4, characterised in that, The base comprises: a heat-conducting layer made of a heat-conducting material plate; an insulating layer made of an insulating material arranged in a groove opened on the upper surface of the heat-conducting layer; a functional module arranged on the upper surface of the insulating layer for transmitting the capacitance value between the first electrode and the second electrode to the host computer; a porous heat-conducting ceramic surface layer arranged on the upper surface of the heat-conducting layer, having the performance of insulated heat conduction, and comprising a plurality of through holes for connecting the functional module, the first electrode and the second electrode.

6. A sulphur recovery unit as claimed in claim 1, characterised in that, The sulfur recovery device comprises: an oxidizer for oxidizing the mixture of calcium sulfide and calcium sulfate output by the desulfurization tower to form completely oxidized solid reducing agent calcium sulfate in the form of dust; a rotating separator for rotating and separating the completely oxidized solid reducing agent calcium sulfate in the form of dust to discharge the gas after rotating and separating; a regeneration tower for reducing the completely oxidized solid reducing agent calcium sulfate in the form of dust into calcium sulfide by using coal and steam-reformed natural gas, and feeding it into the desulfurization tower for redox reaction.

7. A method for cleaning a blockage of a sulfur recovery plant, characterized by, The method for cleaning blockage of the sulfur recovery device according to any one of claims 1-6 comprises: S1, collecting real-time capacitance measurement values fed back by a plurality of blockage monitoring modules through the host computer to determine the real-time thickness of sulfur element; S2, obtaining the sulfur element thickness distribution in the axial and circumferential directions of the sulfur transfer pipeline based on the real-time thickness of the sulfur element through the host computer; S3, based on the thickness distribution of the sulfur element, the host computer selectively sends a blockage cleaning instruction to the pipeline heater; S4, real-time detection of the feedback of the blockage monitoring module of the sulfur element film thickness, when the thickness is less than or equal to the preset threshold, stop heating the pipeline heater corresponding to the blockage monitoring module.

8. A storage medium, characterized by It comprises a series of instructions for executing the method steps as claimed in claim 7.

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