System for recovering sulfur in sulfur-containing flue gas

Abstract

The utility model relates to the technical field of industrial flue gas treatment, and discloses a system for recovering sulfur in sulfur-containing flue gas, which comprises a cooling and condensing device, a bag-type dust collector and a tail gas washing system, and the cooling and condensing device comprises a high-temperature condensing assembly, a low-temperature condensing assembly, a connecting box and an anti-blocking assembly, the cooling and condensing device composed of the high-temperature condensing assembly and the low-temperature condensing assembly is adopted, graded cooling is carried out according to different phase change temperatures of sulfur, the high-temperature condensing assembly preliminarily cools high-temperature sulfur-containing flue gas to 150-200 DEG C, most of sulfur steam is efficiently condensed into liquid sulfur, and the temperature interval ensures that the sulfur steam is fully liquefied, and the sulfur steam can be efficiently condensed into liquid sulfur. And then, the flue gas is further cooled to 80-120 DEG C by the low-temperature condensation assembly, so that the residual sulfur steam is condensed into solid sulfur, the sulfur in the flue gas can be fully recovered by the stage treatment mode, and the recovery rate of the sulfur is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial flue gas treatment technical field, concretely is a sulfur in sulfur -containing flue gas sulfur recovery system. BACKGROUND

[0002] In the industrial production process, the emission of sulfur -containing flue gas is an environmental problem that needs to be solved urgently. In order to reduce environmental pollution and realize the effective utilization of resources, the recovery of sulfur from sulfur -containing flue gas has become one of the key research directions.

[0003] The traditional sulfur recovery process, taking the Claus method as a typical representative, mainly relies on complex chemical reactions. In this process, a series of reaction steps are needed to realize the conversion from sulfur -containing compounds to sulfur. However, this method has many drawbacks. First, the process flow is relatively complex, involving multiple reaction units and operation links, which not only increases the equipment investment cost, but also greatly increases the difficulty of system operation and maintenance. Secondly, since a large amount of energy is consumed to maintain the reaction conditions during the reaction process, the energy consumption is high. In addition, the Claus method also highly depends on catalysts to promote the reaction, and the use of catalysts not only increases the cost, but also needs to be replaced and maintained regularly, and the activity of the catalyst is also easily affected by many factors, further reducing the stability and reliability of the process.

[0004] In contrast, the research on direct recovery of sulfur by physical method is relatively less. The existing cooling technology has low efficiency in the process of realizing sulfur vapor condensation and recovery of sulfur. More importantly, temperature control has become a difficult problem to overcome. If the temperature control is not proper, on the one hand, it is easy to cause sulfur vapor not to condense fully and escape into the atmosphere, causing environmental pollution; on the other hand, too low temperature may cause sulfur to condense too early in the pipeline, thereby causing pipeline blockage problem, seriously affecting the normal operation of the system.

[0005] Therefore, we propose a sulfur recovery system in sulfur -containing flue gas. Utility model content

[0006] The utility model aims at providing a sulfur recovery system in sulfur -containing flue gas, so as to solve or at least alleviate one or more of the above problems and other aspects in the prior art.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: a sulfur recovery system in sulfur -containing flue gas, comprising:

[0008] The cooling condensing device comprises a high-temperature condensing assembly, a low-temperature condensing assembly and a connecting box, and the gas outlet of the high-temperature condensing assembly is connected with the gas inlet of the low-temperature condensing assembly through the connecting box.

[0009] The high-temperature condensing assembly is used for primary cooling of high-temperature sulfur-containing flue gas, so that sulfur vapor in the high-temperature sulfur-containing flue gas is converted into liquid state;

[0010] The low-temperature condensing assembly is used for further cooling of the cooled flue gas, so that the remaining sulfur vapor in the flue gas is condensed into solid state;

[0011] A sulfur collection device is arranged at the bottom of the connecting box and used for collecting liquid sulfur and solid sulfur separately;

[0012] A blocking prevention assembly is arranged in the low-temperature condensing assembly and used for preventing the solidified sulfur from blocking the low-temperature condensing assembly;

[0013] A bag-type dust collector is connected to the exhaust gas flue and the exhaust gas outlet of the low-temperature condensing assembly;

[0014] An exhaust gas washing system is used for purifying the remaining toxic gas in the exhaust gas, and the purified gas is discharged into the atmosphere after being detected by an exhaust gas detection system.

[0015] In the sulfur-containing flue gas sulfur recovery system according to the utility model, the high-temperature condensing assembly comprises a high-temperature smoke box, one end of the high-temperature smoke box is connected with a high-temperature flue, the bottom of the high-temperature smoke box is connected with a high-temperature array pipe, and the bottom of the high-temperature array pipe is connected with the upper end of the interior of the connecting box.

[0016] The first heat exchange pipe is spirally wound on the high-temperature array pipe;

[0017] The low-temperature condensing assembly comprises a low-temperature smoke box, the exhaust gas outlet of the low-temperature smoke box is connected with the exhaust gas flue, the bottom of the low-temperature smoke box is connected with a low-temperature array pipe, the bottom of the low-temperature array pipe is connected with the upper end of the interior of the connecting box, and the second heat exchange pipe is spirally wound on the low-temperature array pipe.

[0018] In the sulfur-containing flue gas sulfur recovery system according to the utility model, a high-temperature temperature controller is arranged in the interior of the connecting box, and a low-temperature temperature controller is arranged in the interior of the low-temperature smoke box.

[0019] In the sulfur-containing flue gas sulfur recovery system according to the utility model, the temperature of the exhaust gas entering the connecting box after being cooled by the high-temperature array pipe is maintained at 150-200 DEG C, and the temperature of the exhaust gas entering the low-temperature smoke box after being cooled by the low-temperature array pipe is maintained at 80-120 DEG C.

[0020] Optionally, the sulfur collecting device comprises a collecting funnel, the collecting funnel is fixedly installed at the bottom of the connecting box, two collecting funnels are arranged, one of the collecting funnels is located directly below the high-temperature array pipe, and the other collecting funnel is located directly below the low-temperature array pipe.

[0021] The bottom of each of the two collecting funnels is communicated with a flow guide pipe, the bottom of the flow guide pipe is communicated with a sulfur collecting tank, the bottom of the sulfur collecting tank is communicated with a discharge pipe, and a second valve is installed on the discharge pipe.

[0022] A first valve is installed on the flow guide pipe.

[0023] Optionally, the anti-blocking assembly comprises a rotating rod, the rotating rod is rotatably installed in the low-temperature smoke box, the interior of the rotating rod is hollow, a smoke inlet is formed in the bottom of the rotating rod, a smoke outlet is formed in the upper end of the rotating rod, the smoke inlet is communicated with the interior of the low-temperature array pipe, a scraper is fixedly connected to the bottom of the rotating rod, and the scraper is in sliding contact with the inner wall of the low-temperature array pipe.

[0024] Optionally, the scraper is arranged in a spiral shape.

[0025] Optionally, the anti-blocking assembly further comprises a driving member, the driving member comprises a driving motor, the driving motor is fixedly installed on one side of the low-temperature smoke box through a motor base, the upper end of the rotating rod is rotatably penetrated through the top of the low-temperature smoke box through a sealing bearing, a synchronous wheel is fixedly connected to the upper end of the rotating rod and the rotating shaft of the driving motor, and adjacent two synchronous wheels are transmissionally connected through a synchronous belt.

[0026] Optionally, the lower end of the connecting box is provided with a vibration assembly, the vibration assembly comprises a support seat, the support seat is arranged in a frame shape, and a vibration motor is fixedly installed on the support seat.

[0027] Optionally, the installation seat is further provided with a support seat, and the top of the installation seat is connected with the support seat through a rubber damping pad.

[0028] Compared with the prior art, the sulfur recovery system in the sulfur-containing flue gas has the following beneficial effects:

[0029] The system adopts a cooling condensing device composed of a high-temperature condensing assembly and a low-temperature condensing assembly, and performs staged cooling according to different phase change temperatures of sulfur, the high-temperature condensing assembly preliminarily cools the high-temperature sulfur-containing flue gas to 150-200 DEG C, most of the sulfur vapor is efficiently condensed into liquid sulfur, this temperature interval not only ensures that the sulfur vapor is fully liquefied, but also avoids early solidification to block the pipeline, then, the low-temperature condensing assembly further cools the flue gas to 80-120 DEG C, the remaining sulfur vapor is condensed into solid sulfur, this staged treatment mode can fully recover the sulfur in the flue gas, and greatly improves the recovery rate of the sulfur;

[0030] The rotating rod drives the spiral scraper to rotate on the inner wall of the low-temperature array pipe, so that the adhered solid sulfur can be scraped off in time and uniformly, the accumulation of the solid sulfur in the pipeline is prevented, the spiral scraper design can not only strip the solid sulfur more efficiently, but also reduce the resistance during rotation, avoids the occurrence of jamming phenomenon, and ensures smooth flue gas circulation of the system;

[0031] The vibration motor is arranged on the connecting box, which is helpful for the liquid sulfur or solid sulfur to fall into the collecting funnel more smoothly, reduces the adhesion of the sulfur on the inner wall of the pipeline or the equipment, reduces the risk of equipment failure caused by blockage, and improves the efficiency of sulfur collection;

[0032] The first heat exchange pipe and the second heat exchange pipe are arranged, so that heat can be collected. DETAILED DESCRIPTION

[0033] Figure 1 A flow chart of the sulfur-containing flue gas sulfur recovery system of the utility model;

[0034] Figure 2 A structure schematic view of the cooling condensing device in the sulfur-containing flue gas sulfur recovery system of the utility model;

[0035] Figure 3 A front view structure schematic view of the cooling condensing device in the sulfur-containing flue gas sulfur recovery system of the utility model;

[0036] Figure 4 A partial view structure schematic view one of the cooling condensing device in the sulfur-containing flue gas sulfur recovery system of the utility model;

[0037] Figure 5 A partial view structure schematic view two of the cooling condensing device in the sulfur-containing flue gas sulfur recovery system of the utility model;

[0038] Figure 6 A partial cross-sectional view structure schematic view of the cooling condensing device in the sulfur-containing flue gas sulfur recovery system of the utility model;

[0039] Figure 7The utility model relates to a structure schematic drawing of scraper in sulfur-containing flue gas sulfur recovery system.

[0040] In the drawing: 1, high-temperature condensing assembly; 1011, high-temperature flue; 101, high-temperature smoke box; 102, high-temperature array pipe; 103, first heat exchange pipe;

[0041] 2, low-temperature condensing assembly; 201, low-temperature smoke box; 2011, tail gas flue; 202, low-temperature array pipe; 203, second heat exchange pipe;

[0042] 3, connecting box; 301, collection funnel; 302, flow guide pipe; 303, sulfur collection tank; 304, first valve; 305, discharge pipe; 306, second valve;

[0043] 4, mounting seat;

[0044] 5, vibration assembly; 501, support seat; 502, vibration motor; 503, rubber damping pad;

[0045] 6, high-temperature section temperature controller;

[0046] 7, low-temperature section temperature controller;

[0047] 8, anti-blocking assembly; 801, rotating rod; 8011, smoke inlet; 8012, smoke outlet; 802, scraper; 803, synchronous wheel; 804, synchronous belt; 805, driving motor; 806, motor base; 807, sealing bearing. DETAILED DESCRIPTION

[0048] The technical scheme of the utility model will be further explained in combination with the drawings and through specific embodiments.

[0049] Among them, the drawing is only used for example explanation, and the representation is only schematic drawing, and not real object drawing, and can not be understood as the limitation to the patent; in order to better explain the embodiment of the utility model, some components of the drawing will be omitted, enlarged or reduced, and do not represent the size of actual product; for the person skilled in the art, it is understandable that some known structures and their description in the drawing can be omitted.

[0050] The same or similar reference signs in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation and be operated, therefore, the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, and for ordinary skilled persons in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0051] In the description of the present application, unless otherwise explicitly specified and limited, if the terms "connection" and the like indicating the connection relationship between components appear, the term should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For ordinary skilled persons in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0052] Embodiment 1

[0053] Please refer to Figures 1 to 7 The embodiment provides a sulfur recovery system in sulfur-containing flue gas, and is characterized by comprising: a cooling and condensing device, the cooling and condensing device comprises a high-temperature condensing assembly 1, a low-temperature condensing assembly 2 and a connecting box 3, the gas outlet of the high-temperature condensing assembly 1 is connected with the gas inlet of the low-temperature condensing assembly 2 through the connecting box 3; the high-temperature condensing assembly 1 is used for preliminarily cooling high-temperature sulfur-containing flue gas, so that sulfur vapor in the high-temperature sulfur-containing flue gas is converted into liquid state; the low-temperature condensing assembly 2 is used for further cooling the flue gas after cooling, so that the remaining sulfur vapor in the flue gas is condensed into solid state; a sulfur collection device, the sulfur collection device is arranged at the bottom of the connecting box 3 and is used for collecting liquid sulfur and solid sulfur; a anti-blocking assembly 8, the anti-blocking assembly 8 is arranged in the low-temperature condensing assembly 2, and the anti-blocking assembly 8 is used for preventing the sulfur condensed into solid state from blocking the low-temperature condensing assembly 2.

[0054] A bag-type dust collector, the bag-type dust collector is connected with the exhaust port of the low-temperature condensing assembly 2 through the tail gas flue 2011.

[0055] A tail gas washing system, the tail gas washing system is used for purifying the remaining toxic gas in the tail gas filtered by the bag-type dust collector, and the gas after purification is discharged into the atmosphere after being detected by a tail gas detection system.

[0056] In use, the high-temperature sulfur-containing flue gas enters the high-temperature condensing assembly 1 to preliminarily cool the high-temperature sulfur-containing flue gas. In a high-temperature environment, sulfur exists in the flue gas in a vapor state. When the high-temperature sulfur-containing flue gas flows in the high-temperature condensing assembly 1, heat is transferred to the cooling medium by heat exchange. As the temperature decreases, when the dew point temperature of sulfur vapor is reached, the sulfur vapor begins to change phase from a gaseous state to a liquid state.

[0057] After being preliminarily cooled by the high-temperature condensing assembly 1, the flue gas with liquid sulfur and gaseous remaining components enters the connecting box 3. The connecting box 3 plays a role of transition and buffering, providing a short residence space for the liquid sulfur to separate from the flue gas under the action of gravity and precipitate downward, and also providing a relatively stable flow environment for the flue gas entering the low-temperature condensing assembly 2.

[0058] The flue gas from the connecting box 3 enters the low-temperature condensing assembly 2. The flue gas is further cooled. Since part of the sulfur vapor has been condensed into liquid sulfur in the high-temperature condensing assembly 1, the remaining sulfur vapor content in the flue gas entering the low-temperature condensing assembly 2 is relatively low. However, as the temperature further decreases, when the freezing point of sulfur is reached, the remaining sulfur vapor will directly change from a gaseous state to a solid state, because in a low-temperature environment, the molecular motion of sulfur is slowed down, and the intermolecular force is enhanced, allowing sulfur atoms to arrange into a crystal structure in a solid state.

[0059] The sulfur collection device is arranged at the bottom of the connecting box 3, and its purpose is to collect liquid sulfur and solid sulfur. Liquid sulfur will flow into the sulfur collection device due to its own gravity from the bottom of the connecting box 3 to the part of the sulfur collection device for collecting liquid sulfur. Solid sulfur will form in the low-temperature condensing assembly 2, and may adhere to the inner wall of the pipeline and other positions as the flue gas flows. Under the action of the gravity anti-blocking assembly 8, it will also fall to the bottom of the connecting box 3 and enter the corresponding area of the sulfur collection device for collecting solid sulfur. Through this way of separate collection, subsequent further processing and utilization of sulfur in different states can be facilitated.

[0060] After being treated by the low-temperature condensing assembly 2, the tail gas enters the bag filter through the tail gas flue 2011. The bag filter uses the filtering effect of the bag to intercept the solid particles carried in the tail gas.

[0061] The tail gas filtered by the bag filter is introduced into the tail gas washing system under the action of the induced draft fan. In addition to sulfur components, the tail gas may also contain other toxic gases (such as sulfur dioxide, hydrogen sulfide, etc.). The tail gas washing system uses a specific washing liquid (such as an alkaline solution, etc.) to fully contact with the tail gas, and uses chemical reactions to absorb and convert the toxic gases in the tail gas. For example, sulfur dioxide can react with hydroxide ions in the alkaline solution to form sulfite, thereby reducing the content of toxic gases in the tail gas.

[0062] The gas purified by the tail gas washing system enters the tail gas detection system. The tail gas detection system detects various indicators of the purified gas, such as the concentration of toxic gases and the content of particulate matter. Only when the detection results meet the relevant national environmental protection standards, the purified gas can be discharged into the atmosphere, thereby ensuring that the entire sulfur recovery system does not pollute the environment during operation.

[0063] In this embodiment, the high-temperature condensing assembly 1 includes a high-temperature smoke box 101, one end of the high-temperature smoke box 101 is communicated with a high-temperature flue 1011, the bottom of the high-temperature smoke box 101 is communicated with a high-temperature array pipe 102, the bottom of the high-temperature array pipe 102 is communicated with the inner upper end of the connecting box 3; the first heat exchange pipe 103 is spirally wound on the high-temperature array pipe 102; the low-temperature condensing assembly 2 includes a low-temperature smoke box 201, the smoke outlet of the low-temperature smoke box 201 is communicated with a tail gas flue 2011, the bottom of the low-temperature smoke box 201 is communicated with a low-temperature array pipe 202, the bottom of the low-temperature array pipe 202 is communicated with the inner upper end of the connecting box 3, and the second heat exchange pipe 203 is spirally wound on the low-temperature array pipe 202.

[0064] The high-temperature sulfur-containing flue gas enters the high-temperature smoke box 101 from the high-temperature flue 1011, and then enters the high-temperature array pipe 102. The cooling medium in the first heat exchange pipe 103 cools the flue gas in the high-temperature array pipe 102, so that the sulfur vapor condenses into liquid sulfur flowing into the connecting box 3. The cooled flue gas enters the low-temperature array pipe 202 from the connecting box 3, and the cooling medium in the second heat exchange pipe 203 further cools it, so that the remaining sulfur vapor condenses into solid sulfur.

[0065] In this embodiment, the high-temperature segment temperature controller 6 is installed in the connecting box 3, and the low-temperature segment temperature controller 7 is installed in the low-temperature smoke box 201.

[0066] The high-temperature segment temperature controller 6 is used to monitor the temperature in the connecting box 3, control the temperature and flow of the cooling medium in the first heat exchange pipe 103, and ensure that the flue gas in the high-temperature array pipe 102 is cooled to an appropriate temperature, so that the sulfur vapor is smoothly condensed into a liquid state. The low-temperature segment temperature controller 7 monitors the temperature in the low-temperature smoke box 201, controls the temperature and flow of the cooling medium in the second heat exchange pipe 203, and ensures that the flue gas in the low-temperature array pipe 202 is cooled to a temperature that can make the remaining sulfur vapor condense into a solid state.

[0067] Further, the temperature of the tail gas entering the connection box 3 after being cooled by the high-temperature array pipe 102 is maintained at 150-200℃, and the temperature of the tail gas entering the low-temperature smoke box 201 after being cooled by the low-temperature array pipe 202 is maintained at 80-120℃.

[0068] The temperature of the tail gas cooled by the high-temperature array pipe 102 is controlled at 150-200℃, which can ensure that the sulfur vapor is fully condensed into liquid state, while avoiding that the temperature is too low to cause partial sulfur vapor to be directly solidified to block the pipe. The temperature of the tail gas cooled by the low-temperature array pipe 202 is controlled at 80-120℃, which can make the remaining sulfur vapor be condensed into solid state, and the temperature is beneficial to subsequent processing of the tail gas, preventing that the temperature is too low to affect the performance of the equipment or cause other problems.

[0069] For example, when the flue gas flow is 25000m 3 / h, and the sulfur vapor concentration is 15%-35%. During the operation of the system, the initial temperature of the cooling water in the high-temperature section is set to 60℃, which is adjusted in real time by the high-temperature section temperature controller 6 according to the flue gas temperature and the sulfur vapor concentration, to ensure that the temperature of the tail gas at the outlet of the high-temperature array pipe 102 is stabilized at about 180℃, so that most of the sulfur vapor is condensed into liquid sulfur. The initial temperature of the refrigerant in the low-temperature section is set to 35℃, which is precisely controlled by the low-temperature section temperature controller 7, to ensure that the temperature of the tail gas at the outlet of the low-temperature array pipe 202 is maintained at about 100℃, so that the remaining sulfur vapor is fully solidified. It is detected that the sulfur recovery rate reaches 92%, and the purity is 90%

[0070] For example, when the flue gas flow is 35000m 3 / h, and the sulfur vapor concentration is 25%-35%. The temperature of the cooling water in the high-temperature section is maintained at 55-65℃, so that the flue gas in the high-temperature array pipe 102 is cooled at a faster speed, and more sulfur vapor is condensed into liquid sulfur in the high-temperature section. The temperature of the refrigerant in the low-temperature section is maintained at 30-35℃, which strengthens the condensation effect of the low-temperature condensation assembly 2, and promotes the remaining sulfur vapor to be more fully solidified into solid sulfur. After adjustment, the sulfur recovery rate is increased to 95%, and the purity is ≥93%.

[0071] In this embodiment, the sulfur collecting device includes two collecting funnels 301, one of which is located below the high-temperature array pipe 102, and the other of which is located directly below the low-temperature array pipe 202. The bottom of each collecting funnel 301 is connected with a flow guide pipe 302, the bottom of the flow guide pipe 302 is connected with a sulfur collecting tank 303, the bottom of the sulfur collecting tank 303 is connected with a discharge pipe 305, the discharge pipe 305 is provided with a second valve 306, and the flow guide pipe 302 is provided with a first valve 304.

[0072] The liquid sulfur condensed from the high-temperature array tube 102 and the solid sulfur at the low-temperature smoke box 201 fall into the corresponding collection funnel 301 respectively, and enter the sulfur collection tank 303 through the flow guide pipe 302. When it is necessary to discharge the sulfur, the first valve 304 is closed, and then the second valve 306 is opened, so that the sulfur is discharged from the discharge pipe 305. This process does not affect the normal operation of the cooling and condensing device.

[0073] In the preferred embodiment, the anti-blocking assembly 8 comprises a rotating rod 801 rotatably installed in the interior of the low-temperature smoke box 201. The interior of the rotating rod 801 is hollow. The bottom of the rotating rod 801 is provided with an inlet smoke port 8011. The upper end of the rotating rod 801 is provided with an outlet smoke port 8012. The inlet smoke port 8011 is in communication with the interior of the low-temperature array tube 202. The bottom of the rotating rod 801 is fixedly connected with a scraper 802. The scraper 802 is in sliding contact with the inner wall of the low-temperature array tube 202.

[0074] The rotating rod 801 rotates in the low-temperature smoke box 201. The flue gas in the low-temperature array tube 202 enters the rotating rod 801 from the inlet smoke port 8011 and is discharged from the outlet smoke port 8012. The scraper 802 at the bottom of the rotating rod 801 is rotated with the rotating rod 801, so as to scrape off the solid sulfur condensed on the inner wall of the low-temperature array tube 202, thereby preventing the solid sulfur from accumulating and blocking the pipeline.

[0075] Further, the scraper 802 is spirally arranged.

[0076] When the scraper 802 in the spiral shape rotates, it can more comprehensively contact the inner wall of the low-temperature array tube 202. Compared with the ordinary scraper, the scraping effect of the solid sulfur is better. The solid sulfur can be more effectively prevented from accumulating locally on the inner wall of the pipeline, so as to ensure the smoothness of the pipeline. Moreover, the scraped solid sulfur can be pressed downward, so as to smoothly enter the connection box 3.

[0077] Further, the anti-blocking assembly 8 further comprises a driving member. The driving member comprises a driving motor 805 fixedly installed on one side of the low-temperature smoke box 201 through a motor base 806. The upper end of the rotating rod 801 penetrates through the top of the low-temperature smoke box 201 through a sealing bearing 807. The upper end of the rotating rod 801 and the upper end of the rotating shaft of the driving motor 805 are both fixedly connected with synchronous wheels 803. Adjacent two synchronous wheels 803 are drivingly connected through a synchronous belt 804.

[0078] After the driving motor 805 is started, the rotating shaft drives the synchronous wheels 803 to rotate. Through the synchronous belt 804, the synchronous wheel 803 at the upper end of the rotating rod 801 is driven to rotate, so as to drive the rotating rod 801 to rotate, thereby realizing the scraping operation of the scraper 802 on the solid sulfur on the inner wall of the low-temperature array tube 202. The sealing bearing 807 ensures the sealing property of the rotating rod 801 when it rotates, so as to prevent the flue gas from leaking.

[0079] In this embodiment, the lower end of the connection box 3 is provided with a vibration assembly 5, which includes a support seat 501 in the form of a frame, and a vibration motor 502 fixedly installed on the support seat 501.

[0080] The vibration motor 502 generates vibration after starting, which is transmitted to the connection box 3 through the support seat 501. The vibration can make the liquid sulfur and solid sulfur in the connection box 3 flow more smoothly to the collecting funnel 301, avoid the accumulation of sulfur in the connection box 3, and also help to remove the sulfur that may be attached to the inner wall of the connection box 3.

[0081] In this embodiment, a mounting seat 4 is also included, and the top of the mounting seat 4 is connected to the support seat 501 through a rubber shock pad 503. The rubber shock pad 503 can reduce the vibration generated by the vibration assembly 5 from being transmitted to the mounting seat 4 and other equipment, avoid affecting the surrounding equipment due to excessive vibration, and ensure the stability of the entire system.

[0082] Working principle:

[0083] 1. The high-temperature sulfur-containing flue gas enters the high-temperature flue box 1011 through the high-temperature flue 1011, and then enters the high-temperature array tube 102. The cooling medium in the first heat exchange tube 103 cools it down, causing the sulfur vapor to condense into liquid sulfur, which falls into the corresponding collecting funnel 301 at the bottom of the connection box 3, and then enters the sulfur collection tank 303 through the flow guide pipe 302. The temperature of the cooled tail gas is maintained at 150-200℃ and enters the connection box 3.

[0084] 2. The tail gas in the connection box 3 enters the low-temperature array tube 202, and the cooling medium in the second heat exchange tube 203 further cools the tail gas, causing the remaining sulfur vapor to condense into solid sulfur. The driving motor 805 of the anti-blocking assembly 8 drives the rotating rod 801 and the scraper 802 to rotate, scraping off the solid sulfur on the inner wall of the low-temperature array tube 202, causing it to fall into another collecting funnel 301 at the bottom of the connection box 3, and then enter the sulfur collection tank 303 through the flow guide pipe 302. The temperature of the cooled tail gas is maintained at 80-120℃ and enters the low-temperature flue box 201.

[0085] 3. The tail gas in the low-temperature flue box 201 enters the bag-type dust collector through the tail gas flue 2011 to remove dust. Then the tail gas enters the tail gas washing system through the induced draft fan to purify the toxic gases therein. The purified gas is detected by the tail gas detection system and discharged into the atmosphere after passing the detection.

[0086] 4. When it is necessary to discharge sulfur, the first valve 304 is closed, and then the second valve 306 is opened to discharge the sulfur in the sulfur collection tank 303.

[0087] The parts not involved in the utility model are the same as the prior art or can be realized by using the prior art. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A sulfur recovery system for sulfur-containing flue gas, characterized in that, include: The cooling and condensing device includes a high-temperature condensing component (1), a low-temperature condensing component (2), and a connecting box (3). The outlet of the high-temperature condensing component (1) is connected to the inlet of the low-temperature condensing component (2) through the connecting box (3). The high-temperature condensation component (1) is used to initially cool the high-temperature sulfur-containing flue gas, so that the sulfur vapor in the high-temperature sulfur-containing flue gas is converted into liquid. The low-temperature condensation component (2) is used to further cool the cooled flue gas, so that the remaining sulfur vapor in the flue gas condenses into a solid. A sulfur collection device is installed at the bottom of the connecting box (3) for the separate collection of liquid sulfur and solid sulfur. Anti-blocking component (8), the anti-blocking component (8) is disposed in the low temperature condensation component (2), the anti-blocking component (8) is used to prevent sulfur condensed into solid state from blocking the low temperature condensation component (2); A bag filter dust collector, wherein the bag filter dust collector is connected to the exhaust port of the low-temperature condensation component (2) through a tail gas flue (2011); The exhaust gas scrubbing system uses an induced draft fan to introduce the exhaust gas filtered by the bag filter into the system, purifying the remaining toxic gases in the exhaust gas. The purified gas is then discharged into the atmosphere after passing the exhaust gas detection system.

2. The sulfur recovery system for sulfur-containing flue gas according to claim 1, characterized in that: The high-temperature condensation component (1) includes a high-temperature smoke box (101), one end of which is connected to a high-temperature flue (1011), and the bottom of the high-temperature smoke box (101) is connected to a high-temperature array tube (102), the bottom of which is connected to the upper interior of the connecting box (3). The high-temperature array tube (102) is spirally wound with a first heat exchange tube (103); The low-temperature condensation assembly (2) includes a low-temperature smoke box (201), the exhaust port of the low-temperature smoke box (201) is connected to the exhaust flue (2011), the bottom of the low-temperature smoke box (201) is connected to a low-temperature array tube (202), the bottom of the low-temperature array tube (202) is connected to the upper interior of the connecting box (3), and a second heat exchange tube (203) is spirally wound on the low-temperature array tube (202).

3. A sulfur recovery system for sulfur-containing flue gas according to claim 2, characterized in that: The high-temperature section temperature controller (6) is installed inside the connecting box (3), and the low-temperature section temperature controller (7) is installed inside the low-temperature smoke box (201).

4. A sulfur recovery system for sulfur-containing flue gas according to claim 3, characterized in that: The exhaust gas temperature entering the connection box (3) after being cooled by the high-temperature array tube (102) is maintained at 150℃-200℃, and the exhaust gas temperature entering the low-temperature smoke box (201) after being cooled by the low-temperature array tube (202) is maintained at 80℃-120℃.

5. A sulfur recovery system for sulfur-containing flue gas according to claim 2, characterized in that: The sulfur collection device includes a collection funnel (301), which is fixedly installed at the bottom of the connecting box (3). There are two collection funnels (301), one of which is located directly below the high-temperature array tube (102), and the other is located directly below the low-temperature array tube (202). The bottom of both collection funnels (301) is connected to a guide pipe (302), the bottom of which is connected to a sulfur collection tank (303), and the bottom of which is connected to a discharge pipe (305). A second valve (306) is installed on the discharge pipe (305). A first valve (304) is installed on the guide pipe (302).

6. A sulfur recovery system for sulfur-containing flue gas according to claim 2, characterized in that: The anti-clogging component (8) includes a rotating rod (801), which is rotatably installed inside the low-temperature smoke box (201). The interior of the rotating rod (801) is hollow. A smoke inlet (8011) is provided at the bottom of the rotating rod (801), and a smoke outlet (8012) is provided at the upper end of the rotating rod (801). The smoke inlet (8011) is connected to the interior of the low-temperature array tube (202). A scraper (802) is fixedly connected to the bottom of the rotating rod (801), and the scraper (802) slides in contact with the inner wall of the low-temperature array tube (202).

7. A sulfur recovery system for sulfur-containing flue gas according to claim 6, characterized in that: The scraper (802) is arranged in a spiral shape.

8. A sulfur recovery system for sulfur-containing flue gas according to claim 6, characterized in that: The anti-blocking component (8) also includes a driving component, which includes a drive motor (805). The drive motor (805) is fixedly installed on one side of the low-temperature smoke box (201) via a motor base (806). The upper end of the rotating rod (801) rotates through the top of the low-temperature smoke box (201) via a sealed bearing (807). The upper end of the rotating rod (801) and the upper end of the shaft of the drive motor (805) are both fixedly connected to a synchronous pulley (803). Two adjacent synchronous pulleys (803) are connected by a synchronous belt (804).

9. A sulfur recovery system for sulfur-containing flue gas according to claim 1, characterized in that: The lower end of the connecting box (3) is provided with a vibration component (5), the vibration component (5) includes a support base (501), the support base (501) is frame-shaped, and a vibration motor (502) is fixedly installed on the support base (501).

10. A sulfur recovery system for sulfur-containing flue gas according to claim 9, characterized in that: It also includes a mounting base (4), the top of which is connected to the support base (501) via a rubber shock-absorbing pad (503).

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