A fixed-bed desulfurization device with automatic loading and unloading

Abstract

The present invention relates to the technical field of flue gas desulfurization, and discloses a fixed-bed desulfurization device with automatic loading and unloading, which includes a desulfurization device main body. The desulfurization device main body is successively a heat exchange chamber, a purification chamber and a diversion chamber from top to bottom. A heat exchange part, a material storage part and a transmission part are respectively arranged in the heat exchange chamber, the purification chamber and the diversion chamber. A pushing part passing through the material storage part is installed at the bottom of the heat exchange part, and a blanking recovery part is assembled at the bottom of the material storage part. A column successively passing through the heat exchange part, the material storage part and the blanking recovery part is installed at the center of the desulfurization device main body; the high-temperature flue gas heats the shape memory alloy to make it expand, drives the guide ring and the infusion pipe to move downward, and triggers the material shaking action; the flue gas and the desulfurizing agent are in countercurrent: the flow limiting head is pulled away to increase the flue gas inlet volume, and the desulfurizing agent freely falls to form a countercurrent with the flue gas, improving the efficiency; oscillation and reaction: the blanking recovery part, the first connecting rod and the material distribution table oscillate reciprocally, promoting the continuous reaction of the desulfurizing agent and the flue gas.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas desulfurization, and more specifically to a fixed-bed desulfurization device with automatic loading and unloading. Background Art

[0002] Traditional flue gas desulfurization technologies are mainly divided into two categories: dry method and wet method. Dry desulfurization removes sulfur-containing gases in flue gas by using powdered or granular absorbents, adsorbents or catalysts. To improve the desulfurization efficiency, multiple layers of packing are usually arranged in the desulfurization tower, and an induced draft fan can be equipped according to actual needs. For example, the Chinese invention patent with publication number CN112812858A discloses a new type of dry vertical desulfurization tower for blast furnace gas. Its structure includes a tower body, a blast furnace gas inlet pipe, a blast furnace gas outlet pipe, a desorbed gas inlet pipe and a desorbed gas outlet pipe. Inside the tower body, multiple adsorption chambers are arranged in sequence from bottom to top. Adjacent adsorption chambers are hermetically separated by partition plates. A layer of packing layer is arranged in the middle of each adsorption chamber. Above and below the packing layer, there are air inlets one and two respectively. One of them is connected to the blast furnace gas inlet pipe and the desorbed gas outlet pipe, and the other is connected to the blast furnace gas outlet pipe and the desorbed gas inlet pipe. This invention has the advantages of small floor area and high desulfurization efficiency, and is especially suitable for the working conditions of large blast furnace gas flow and low pressure.

[0003] In the prior art, the contact area between the solid desulfurizer in the desulfurization device and the sulfur-containing gas is often limited, resulting in the desulfurizer being replaced before it is fully reacted and utilized. This not only reduces the desulfurization efficiency but also causes waste of resources. This technical defect is particularly prominent in traditional dry desulfurization processes and urgently needs to be improved through innovative design to improve the utilization rate of the desulfurizer and the overall desulfurization effect. Summary of the Invention

[0004] To overcome the above-mentioned defects of the prior art, the present invention provides a fixed-bed desulfurization device with automatic loading and unloading to solve the problem of how to improve the utilization rate of the solid desulfurizer in the desulfurization device to save energy consumption as described in the above background art.

[0005] The present invention provides the following technical solutions: A fixed-bed desulfurization device with automatic loading and unloading, including a desulfurization device main body. The desulfurization device main body is successively a heat exchange chamber, a purification chamber and a diversion chamber from top to bottom, and its top and bottom ends are respectively equipped with a feeding part and a discharging part. An inlet pipe and an exhaust pipe connected to the diversion chamber and the heat exchange chamber are respectively installed on one side of the desulfurization device main body. A heat exchange part, a material storage part and a transmission part are respectively arranged in the heat exchange chamber, the purification chamber and the diversion chamber. The bottom of the heat exchange part is equipped with a pushing part passing through the material storage part, and the bottom of the material storage part is equipped with a material dropping and recycling part. A column successively passing through the heat exchange part, the material storage part and the material dropping and recycling part is installed at the center of the desulfurization device main body;

[0006] The heat exchange part includes a telescopic spiral tube and a guide ring. The telescopic spiral tube is spirally wound around the periphery of the column, and its top and bottom ends are respectively connected to guide rings communicating therewith. A shape memory alloy is assembled between the guide rings. The material storage part includes a feeding bucket, a cross beam, an elastic telescopic rod, a first connecting rod and a material distribution table. The feeding bucket slides and adheres to the inside of the desulfurization device main body. There is an interlayer cavity on its side wall and the bottom wall is an open structure. A material distribution table is arranged at the inner bottom of the feeding bucket. The side edge of the material distribution table passes through a slideway on the inner side wall of the inner layer of the desulfurization device main body. Shunt holes are formed on the surface of the material distribution table, and the bottom wall is symmetrically connected with a first connecting rod for pulling the material falling and recycling part. An elastic telescopic rod assembled on the inner wall of the desulfurization device main body is arranged above the feeding bucket, and the telescopic end of the elastic telescopic rod is connected to the feeding bucket.

[0007] Further, the heat exchange part further includes an infusion pipe, a flexible pipe and a sealing cover. Infusion pipes are symmetrically distributed around the centers on the side walls of the upper and lower guide rings. A through groove for the lower infusion pipe to slide up and down is formed on the side wall of the desulfurization device main body. A sealing cover for sealing it is arranged outside the through groove. A flexible pipe is arranged inside the sealing cover. One end of the flexible pipe is connected to the infusion pipe, and the other end seals and passes through the sealing cover.

[0008] Further, the shape memory alloy is made of Ni-Ti alloy material.

[0009] Further, the guide ring connected to the bottom end of the telescopic spiral tube is movably sleeved on the surface of the column, and a linear slide rail is formed on the surface of the column. The inner edge of the guide ring is slidably clamped in the linear slide rail.

[0010] Further, the pushing part includes an L-shaped push rod, an annular wire frame and a flow limiting head. The top end of the L-shaped push rod is fixedly connected to the bottom wall of the lower guide ring, and its bottom end movably passes through a through hole of the material distribution table and is fixedly connected to the annular wire frame. Flow limiting heads corresponding to the shunt holes one by one are arranged on the annular wire frame.

[0011] Further, the cross-sectional diameter of the flow limiting head is smaller than the inner diameter of the shunt hole of the material distribution table, that is, there is a gap for flue gas to enter between the flow limiting head and the shunt hole of the material distribution table, and the top end of the flow limiting head is conical.

[0012] Further, the material falling and recycling part includes a blanking bucket, a material falling groove, a plug plate, a second connecting rod and a hydraulic cylinder. The blanking bucket and the material falling groove are integrally formed. The blanking bucket slides and adheres to the inside of the desulfurization device main body. The top end of the material falling groove is connected to the blanking bucket, and its bottom end converges inwards. The connection part at the top of the two forms a conical ring cavity. An air inlet arc opening communicating with the conical ring cavity is formed on the side top wall of the material falling groove, and a material falling arc opening is formed on the edge of the bottom wall. The plug plate seals and blocks the material falling arc opening. The hydraulic cylinder is installed on the inner wall of the desulfurization device main body below the conical ring cavity. The plug plate is connected to the telescopic end of the hydraulic cylinder through the second connecting rod. The material falling groove is fixedly connected to the first connecting rod.

[0013] Further, the transmission part includes a rotating shaft, a cam, an impeller and a vertical frame. The rotating shaft is aligned with the nozzle of the intake pipe and is rotatably sleeved at the center of the vertical frame. The vertical frame is installed in the diversion chamber. The impeller located in the vertical frame is coaxially sleeved with the rotating shaft. Cams are fixedly sleeved at both ends of the rotating shaft. The blanking chute that sinks into the diversion chamber is intermittently extruded by the rotating cam and oscillates.

[0014] Further, the top surface of the blanking chute is provided with a slope structure that slopes downward toward the periphery.

[0015] Further, a flue gas inlet SO 2 detector and a flue gas outlet SO 2 detector are respectively assembled on the intake pipe and the exhaust pipe. A control system is also installed on the side wall of the desulfurization device main body. The output end of the flue gas inlet SO 2 detector and the output end of the flue gas outlet SO 2 detector are electrically connected to the input end of the control system. By analyzing the concentration difference of SO 2 at the inlet and outlet, it is judged whether it is necessary to change the material.

[0016] Technical effects and advantages of the present invention:

[0017] By the combined use of the heat exchange part, the pushing part, the material storage part, the blanking recovery part and the transmission part, the present invention is conducive to heating the shape memory alloy by high-temperature flue gas to make it expand, driving the guide ring and the infusion pipe to move downward, triggering the blanking action, causing the flow-limiting head to be pulled away to increase the flue gas intake, the desulfurization agent to freely fall and form a convection with the flue gas, improving the efficiency; at the same time, the impeller vortex drains to accelerate the pumping of the flue gas, and the cam intermittently extrudes the blanking chute to enhance the reaction, causing the blanking recovery part, the first connecting rod and the material distribution table to oscillate reciprocally, promoting the continuous reaction between the desulfurization agent and the flue gas, improving the utilization rate of the solid desulfurization agent in the desulfurization device, and saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 is a schematic diagram of the overall structure and its partial cross-section of the present invention.

[0020] Figure 3 is of the present invention Figure 2 schematic diagram of the structure at A therein.

[0021] Figure 4 is of the present invention Figure 2 schematic diagram of the remaining structure and its further cross-section after removing the feeding part and the discharging part therein.

[0022] Figure 5 is of the present invention Figure 4 schematic diagram of the lower half local area of the structure therein.

[0023] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at position B in

[0024] Figure 7 For the present invention Figure 5 Schematic diagram of the connection structure of the heat exchange part, material storage part, pushing part and blanking recovery part in

[0025] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at position C in

[0026] Figure 9 For the present invention Figure 7 Schematic diagram of the structure at position D in

[0027] Figure 10 For the present invention Figure 7 Bottom view schematic diagram of the structure in

[0028] Figure 11 Schematic diagram of the connection structure of the main body of the desulfurization device, the intake pipe and the transmission part of the present invention

[0029] Reference numerals are: 1, main body of the desulfurization device; 2, intake pipe; 3, exhaust pipe; 4, feeding part; 401, material guiding groove; 402, double-layer feeding valve; 403, feeding hopper; 5, discharging part; 501, discharging hopper; 502, double-layer discharging valve; 503, scraper conveyor; 6, heat exchange part; 601, telescopic spiral pipe; 602, guiding ring; 603, infusion pipe; 604, hose; 605, sealing cover; 7, material storage part; 701, feeding barrel; 702, cross beam; 703, elastic telescopic rod; 7031, pipe cavity; 7032, piston rod; 7033, first spring; 704, first connecting rod; 705, second spring; 706, material distributing table; 8, column; 9, pushing part; 901, L-shaped push rod; 902, annular grid; 903, flow limiting head; 10, blanking recovery part; 1001, blanking barrel; 1002, blanking chute; 1003, plug plate; 1004, second connecting rod; 1005, hydraulic cylinder; 1006, air inlet arc; 11, transmission part; 1101, rotating shaft; 1102, cam; 1103, impeller; 1104, vertical frame; 12, control system; 13, viewing window; 14, shape memory alloy. Detailed implementation manners

[0030] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples, and a fixed-bed desulfurization device with automatic loading and unloading involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0031] Referring to Figures 1-11 , the present invention provides a fixed-bed desulfurization device with automatic loading and unloading, including a desulfurization device main body 1. The desulfurization device main body 1 is successively a heat exchange chamber, a purification chamber and a diversion chamber from top to bottom, and a feed part 4 and a discharge part 5 are respectively assembled at its top and bottom ends. An air inlet pipe 2 and an exhaust pipe 3 connected to the diversion chamber and the heat exchange chamber are respectively installed on one side of the desulfurization device main body 1. A heat exchange part 6, a stockpiling part 7 and a transmission part 11 are respectively arranged in the heat exchange chamber, the purification chamber and the diversion chamber; a pushing part 9 passing through the stockpiling part 7 is installed at the bottom of the heat exchange part 6, and a blanking recovery part 10 is assembled at the bottom of the stockpiling part 7. A column 8 successively passing through the heat exchange part 6, the stockpiling part 7 and the blanking recovery part 10 is installed at the center of the desulfurization device main body 1; the high-temperature flue gas heats the shape memory alloy 14 to make it expand, and the pushing part 9 is used to push the blanking recovery part 10, the first connecting rod 704 and the material distribution table 706 downward, so that the blanking chute 1002 is intermittently extruded by the cam 1102, triggering the material shaking action.

[0032] In this embodiment, it should be specifically noted that a viewing window 13 is provided on the side wall of the purification chamber of the desulfurization device main body 1. The viewing window 13 can be made of transparent tempered glass, which is used to observe the position of the stockpiling part 7 and the dynamic change of the desulfurizer content inside;

[0033] Smoke inlet SO 2 detectors are respectively assembled on the air inlet pipe 2 and the exhaust pipe 3, and smoke outlet SO 2 detectors. A control system 12 is also installed on the side wall of the desulfurization device main body 1. The output ends of the smoke inlet SO 2 detectors and the smoke outlet SO 2 detectors are electrically connected to the input end of the control system 12. By analyzing the SO 2 concentration difference between the inlet and the outlet, it is judged whether it is necessary to change the material;

[0034] The feed part 4 includes a guide chute 401, a double-layer feed valve 402 and a feed hopper 403. The guide chute 401 is installed at the top of the desulfurization device main body 1 to unobstructedly convey the desulfurizer to the stockpiling part 7. The feed hopper 403 is located above the guide chute 401, and a double-layer feed valve 402 is assembled between the two; the upper part of the feed hopper 403 can be connected to the end of the chain bucket machine, and the new desulfurizer is poured into the chain bucket machine through the feeding trolley and then transferred to the feed hopper 403 at the upper part of the device;

[0035] The discharging section 5 includes a discharging hopper 501, a double-layer discharging valve 502 and a scraper conveyor 503. The discharging hopper 501 is installed at the bottom end of the desulfurization device main body 1, and the scraper conveyor 503 is located below the discharging hopper 501, and the double-layer discharging valve 502 is assembled between the two; the scraper conveyor 503 is used to discharge the old desulfurizer, and a screw feeder can be selected for it;

[0036] The telescopic spiral tube 601 supports a multi-column arrangement configuration and can flexibly adjust the layout according to actual production requirements.

[0037] Refer to Figure 2 、 Figures 4-5 As shown in FIGS. 4-

[0038] In this embodiment, it should be specifically noted that the flexible hoses 604 connecting the upper infusion pipe 603 and the lower infusion pipe 603 are respectively connected to the inlet and outlet of the circulating water path, and part of the heat of the high-temperature flue gas is transferred through the circulating water in the telescopic spiral tube 601, thereby reducing the temperature of the tail gas;

[0039] The shape memory alloy 14 is made of Ni-Ti alloy, and its "transition temperature" (phase change critical point) is about 40°C;

[0040] The guide ring 602 connected to the bottom end of the telescopic spiral tube 601 is movably sleeved on the surface of the column 8, and a linear slide rail is provided on the surface of the column 8. The inner edge of the guide ring 602 is slidably clamped in the linear slide rail, so that the guide ring 602 can only move vertically along the surface of the column 8 without deflection; the guide ring 602 connected to the top end of the telescopic spiral tube 601 is fixedly sleeved on the surface of the column 8.

[0041] Refer to 4- Figure 10The material storage part 7 includes a loading bucket 701, a crossbeam 702, an elastic telescopic rod 703, a first connecting rod 704 and a material distribution platform 706, wherein the loading bucket 701 is slidably attached to the desulfurization device body 1, and its side wall is provided with an interlayer cavity and the bottom wall is an open structure, and a vertically movable material distribution platform 706 is provided at the bottom of the inner layer of the loading bucket 701, and the side edges of the material distribution platform 706 pass through the slideway of the inner layer side wall of the desulfurization device body 1, and are transmission-connected with the second spring 705 provided in the interlayer cavity; the surface of the material distribution platform 706 is provided with a diversion hole, and the bottom wall thereof is symmetrically connected with a first connecting rod 704 for pulling the falling material recovery part 10; an elastic telescopic rod 703 mounted on the inner wall of the desulfurization device body 1 is provided above the loading bucket 701, and the telescopic end of the elastic telescopic rod 703 is connected to the loading bucket 701;

[0042] The recursive part 9 includes an L-shaped push rod 901, an annular grid 902 and a flow limiting head 903, wherein the top end of the L-shaped push rod 901 is fixedly connected to the bottom wall of the lower guide ring 602, and the bottom end thereof movably passes through the perforation of the material distribution platform 706 and is fixedly connected to the annular grid 902; the annular grid 902 is provided with a flow limiting head 903 corresponding to the flow distribution holes one by one;

[0043] The material recovery unit 10 includes a material discharge barrel 1001, a material discharge trough 1002, a plug plate 1003, a second connecting rod 1004 and a hydraulic cylinder 1005, wherein the material discharge barrel 1001 and the material discharge trough 1002 are integrally formed, the material discharge barrel 1001 is slidably attached to the desulfurization device body 1, the top of the material discharge trough 1002 is connected to the material discharge barrel 1001, and the bottom end thereof is retracted inwardly, and the connection between the tops of the two forms a conical annular cavity; the side top wall of the material discharge trough 1002 is provided with an air inlet arc 1006 connected to the conical annular cavity, and the edge of the bottom wall thereof is provided with a material discharge arc, and the plug plate 1005 is provided with a second connecting rod 1004 and a hydraulic cylinder 1005. 003 can be sealed and blocked in the arc opening; the hydraulic cylinder 1005 is installed on the inner wall of the desulfurization device body 1 below the conical annular cavity, and the plug plate 1003 is connected to the telescopic end of the hydraulic cylinder 1005 through the second connecting rod 1004; the blanking trough 1002 is fixedly connected to the first connecting rod 704; the hydraulic cylinder 1005 can be controlled to make its telescopic end drive the plug plate 1003 to move downward with the help of the second connecting rod 1004, so that it is separated from the arc opening of the bottom wall of the blanking trough 1002, and the reaction products can be discharged into the discharge hopper 501 through the arc opening to achieve centralized collection;

[0044] The transmission part 11 includes a rotating shaft 1101, a cam 1102, an impeller 1103 and a stand 1104, wherein the rotating shaft 1101 is aligned with the pipe opening of the air inlet pipe 2 and is rotatably sleeved on the center of the stand 1104, the stand 1104 is installed in the guide chamber, the impeller 1103 located in the stand 1104 is coaxially sleeved with the rotating shaft 1101, and the cams 1102 are fixedly sleeved at both ends of the rotating shaft 1101. The blanking chute 1002 sunk into the guide chamber can be intermittently squeezed by the rotating cam 1102 and oscillate.

[0045] In this embodiment, it should be specifically noted that the cross-sectional diameter of the flow-limiting head 903 is smaller than the inner diameter of the diversion hole, that is, there is a gap for flue gas to enter between the flow-limiting head 903 and the diversion hole of the material distribution table 706, and the desulfurization agent is restricted from falling with the diversion hole; the top end of the flow-limiting head 903 is conical, which can realize the diversion of the diversion hole; the descending position of the annular wire frame 902 will at least not affect the oscillating motion of the blanking recovery part 10, the first connecting rod 704, and the material distribution table 706.

[0046] The supports provided by the shape memory alloy 14 and the elastic telescopic rod 703 will not undergo elastic deformation due to the stacking of materials in the feeding bucket 701 and the material distribution table 706, ensuring that only when the shape memory alloy 14 undergoes thermal expansion, the pushing part 9, the material storage part 7, and the blanking recovery part 10 are triggered to complete the predetermined actions.

[0047] The elastic telescopic rod 703 includes a tube cavity 7031, a piston rod 7032, and a first spring 7033. Among them, the tube cavity 7031 is installed on the inner wall of the desulfurization device main body 1. The piston rod 7032 is movably inserted into the tube cavity 7031, and the surface of the piston rod 7032 is sleeved with a first spring 7033 located in the tube cavity 7031; when the L-shaped push rod 901 gradually releases the pressing action on the material storage part 7, the material storage part 7 and the blanking recovery part 10 can be reset by means of the elastic characteristics of the elastic telescopic rod 703.

[0048] The top surface of the blanking chute 1002 is set as a slope structure that slopes downward towards the periphery, which is convenient for the desulfurization agent accumulated on its top to gather towards the edge, so as to more efficiently achieve discharging.

[0049] A driving device is installed outside the diversion chamber for driving the movement of the transmission part 11; the driving device is composed of a motor, a belt pulley, and a synchronous belt. The torque force output by the motor is transmitted to the rotating shaft 1101 through the belt pulley and the synchronous belt, driving the integral rotation of the rotating shaft 1101, the cam 1102, and the impeller 1103.

[0050] The working principle of the present invention:

[0051] The high-temperature flue gas enters the diversion chamber at the bottom of the desulfurization device main body 1 from the intake pipe 2 and flows upward along the diversion chamber. It is guided to the intake arc port 1006 through the conical annular cavity between the feeding bucket 1001 and the blanking chute 1002, and then is introduced above the blanking chute 1002 from the intake arc port 1006. The flue gas seeps out from the gap between the flow-limiting head 903 and the diversion hole of the material distribution table 706, and undergoes a desulfurization reaction with the desulfurization agent deposited on the material distribution table 706. The desulfurized gas continues to rise, first contacts the shape memory alloy 14, and undergoes heat exchange through the circulating water in the telescopic spiral tube 601 to reduce the temperature of the tail gas. Finally, the purified gas is discharged through the exhaust pipe 3, realizing the continuous purification and efficient treatment of waste gas.

[0052] Since the heat supplied by the high-temperature flue gas to the shape memory alloy 14 exceeds the heat dissipation of the internal water circulation in the telescopic spiral tube 601, the temperature of the shape memory alloy 14 gradually rises until it exceeds the critical point of its phase change temperature. The shape memory alloy 14 begins to extend and drives the guide ring 602 and the infusion tube 603 connected to its bottom end to slide downward. During this process, the flexible hose 604 always maintains its connection with the infusion tube 603 due to its flexibility, ensuring the continuity of the water circulation. At the same time, the guide ring 602 drives the entire pushing part 9 to move downward, so that the current-limiting head 903 gradually withdraws from the diversion hole in the bottom wall of the material distribution table 706, thereby increasing the intake of flue gas. The desulfurization agent freely falls through the diversion hole and forms a convection with the rising flue gas, effectively increasing the contact area between the two and improving the desulfurization efficiency. As the shape memory alloy 14 further extends, the L-shaped push rod 901 connected to the bottom of the guide ring 602 contacts the cross beam 702, causing the feeding bucket 701 directly connected to the cross beam 702 to receive a downward thrust. The feeding bucket 701 elastically pulls the telescopic end of the elastic telescopic rod 703 downward and drives the material distribution table 706, the first connecting rod 704 and the material dropping and recycling part 10 connected to its bottom end to descend together until the material dropping groove 1002 enters the diversion chamber and can make a squeezing action with the cam 1102. The driving device drives the rotating shaft 1101, the cam 1102 and the impeller 1103 to rotate integrally. The rotating impeller 1103 attracts the flue gas in a vortex drainage manner, improving the pumping rate of the flue gas. At the same time, the rotating cam 1102 intermittently squeezes the material dropping groove 1002, enabling the material dropping and recycling part 10, the first connecting rod 704 and the material distribution table 706 to oscillate reciprocally in the vertical direction, prompting the desulfurization agent to continuously pass through the diversion holes in the material distribution table 706 to carry out desulfurization reactions with the flue gas, ensuring the sustainability of efficient desulfurization. The desulfurization agent passing through the diversion holes falls into the material dropping groove 1002 for collection. During the oscillation of the material dropping and recycling part 10, the desulfurization agent collected in the material dropping groove 1002 is continuously lifted, and once again comes into full contact with the incoming flue gas and reacts, thereby realizing the maximization of the utilization of desulfurization agent resources and further improving the desulfurization efficiency. When it is necessary to clean the desulfurization reaction products in the material dropping groove 1002, the hydraulic cylinder 1005 can be controlled to make its telescopic end drive the plug plate 1003 to move downward through the second connecting rod 1004, so that it disengages from the material dropping arc opening at the bottom wall of the material dropping groove 1002, and the reaction products can then be discharged into the discharge hopper 501 through the material dropping arc opening for centralized collection;

[0053] Flue gas inlet SO 2 The detector and the flue gas outlet SO 2 The detectors are respectively used to monitor the SO at the inlet and outlet in real time 2 concentration. The control system 12 analyzes the SO at the inlet and outlet 2Concentration difference is used to determine whether refueling is required (when the difference gradually decreases and approaches 0, it indicates that the desulfurization effect is gradually declining); during refueling, the system first discharges the old desulfurization agent and then loads the new desulfurization agent. During this process, the double-layer feed valve 402 and the double-layer discharge valve 502 ensure the airtightness of the system during on-line refueling; during discharging, the control system 12 first controls the hydraulic cylinder 1005 to disengage the plug plate 1003 from the material dropping arc opening, so that the reaction product can fall into the discharge hopper 501 through the open material dropping arc opening; after the material dropping is completed, the double-layer discharge valve 502 is opened, and the old desulfurization agent is discharged by the scraper conveyor device 503; during loading, the control system 12 first closes the double-layer discharge valve 502, and then resets the plug plate 1003 to close the material dropping arc opening; the charging trolley loaded with the new desulfurization agent dumps the desulfurization agent into the bucket elevator, and then transfers it to the feed hopper 403 at the upper part of the device. Then, the double-layer feed valve 402 is opened, and the desulfurization agent falls along the guide trough 401 into the desulfurization device main body 1 and accumulates on the material distribution table 706; after completion, the double-layer feed valve 402 is closed, and a round of loading and unloading is successfully completed; when the smoke supply to the exhaust pipe 3 stops, the shape memory alloy 14 gradually recovers due to the temperature drop, and then the L-shaped push rod 901 gradually releases the pressing action on the storage part 7, so that the storage part 7 and the material dropping and recovery part 10 can reset by means of the elastic characteristics of the elastic telescopic rod 703, and finally the system returns to the initial state.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention; equivalent substitutions or modifications are made according to the technical plan and its improvement concept of the present invention, and these should all be included under the protection of the present invention.

Claims

1. A fixed bed desulfurization device with automatic loading and unloading, comprising a desulfurization device body (1), wherein the desulfurization device body (1) is composed of a heat exchange chamber, a purification chamber and a guide chamber from top to bottom, and a feeding part (4) and a discharging part (5) are respectively installed at the top and bottom ends thereof, an air intake pipe (2) and an air discharge pipe (3) connected to the guide chamber and the heat exchange chamber are respectively installed on one side of the desulfurization device body (1), and a heat exchange part (6), a material storage part (7) and a transmission part (11) are respectively arranged in the heat exchange chamber, the purification chamber and the guide chamber, and the characteristics are: The bottom of the heat exchange part (6) is provided with a recursive part (9) passing through the material storage part (7), and the bottom of the material storage part (7) is provided with a material recovery part (10), and the center of the desulfurization device body (1) is provided with a column (8) passing through the heat exchange part (6), the material storage part (7) and the material recovery part (10) in sequence; The heat exchange part (6) comprises a retractable spiral tube (601) and a guide ring (602), wherein the retractable spiral tube (601) is spirally wound around the periphery of the column (8), and the top and bottom ends of the retractable spiral tube are respectively connected to the guide rings (602) communicating therewith, and a memory alloy (14) is installed between the guide rings (602); the material storage part (7) comprises a loading bucket (701), a crossbeam (702), an elastic telescopic rod (703), a first connecting rod (704) and a material distribution platform (706), wherein the loading bucket (701) is slidably attached to the desulfurization device body (1), and its side wall A sandwich cavity is provided and the bottom wall is an open structure. The inner bottom of the loading barrel (701) is provided with a material distribution platform (706), and the side edges of the material distribution platform (706) pass through the slideway of the inner side wall of the desulfurization device body (1); the surface of the material distribution platform (706) is provided with a diversion hole, and its bottom wall is symmetrically connected to a first connecting rod (704) for pulling the falling material recovery part (10); an elastic telescopic rod (703) mounted on the inner wall of the desulfurization device body (1) is provided above the loading barrel (701), and the telescopic end of the elastic telescopic rod (703) is connected to the loading barrel (701).

2. The fixed bed desulfurization device with automatic loading and unloading according to claim 1 is characterized in that: The heat exchange part (6) further comprises a liquid infusion pipe (603), a hose (604) and a sealing cover (605); the side walls of the upper and lower guide rings (602) are provided with liquid infusion pipes (603) distributed symmetrically around the center; the side wall of the desulfurization device body (1) is provided with a through groove for the lower liquid infusion pipe (603) to slide up and down; a sealing cover (605) is provided around the through groove to seal the through groove; a hose (604) is provided inside the sealing cover (605), one end of which is connected to the liquid infusion pipe (603) and the other end of which is sealed and passes through the sealing cover (605).

3. The fixed bed desulfurization device with automatic loading and unloading according to claim 1 or 2, characterized in that: The memory alloy (14) is made of Ni-Ti alloy.

4. The fixed bed desulfurization device with automatic loading and unloading according to claim 2 is characterized in that: A guide ring (602) connected to the bottom end of the telescopic spiral tube (601) is movably sleeved on the surface of the column (8), and a linear slide rail is provided on the surface of the column (8), and the inner edge of the guide ring (602) is slidably engaged in the linear slide rail.

5. The fixed bed desulfurization device with automatic loading and unloading according to claim 2 is characterized in that: The recursive part (9) comprises an L-shaped push rod (901), an annular grid (902) and a flow limiting head (903), wherein the top end of the L-shaped push rod (901) is fixedly connected to the bottom wall of the lower guide ring (602), and the bottom end thereof is movable through the through-holes of the material distribution platform (706) and is fixedly connected to the annular grid (902); the annular grid (902) is provided with a flow limiting head (903) corresponding to the flow distribution holes one by one.

6. The fixed bed desulfurization device with automatic loading and unloading according to claim 5 is characterized in that: The cross-sectional diameter of the flow limiting head (903) is smaller than the inner diameter of the diversion hole, that is, there is a gap between the flow limiting head (903) and the diversion hole of the material distribution platform (706) for smoke to enter, and the top of the flow limiting head (903) is conical.

7. The fixed bed desulfurization device with automatic loading and unloading according to claim 1 is characterized in that: The material recovery unit (10) comprises a material discharge barrel (1001), a material discharge trough (1002), a plug plate (1003), a second connecting rod (1004) and a hydraulic cylinder (1005), wherein the material discharge barrel (1001) and the material discharge trough (1002) are integrally formed, the material discharge barrel (1001) is slidably attached to the desulfurization device body (1), the top end of the material discharge trough (1002) is connected to the material discharge barrel (1001), and the bottom end thereof is retracted inwardly, and the connection between the tops of the two forms a conical annular cavity. The side top wall of the blanking chute (1002) is provided with an air inlet arc opening (1006) connected to the conical annular cavity, and the edge of its bottom wall is provided with a blanking arc opening, and the plug plate (1003) is sealed and blocked in the blanking arc opening; the hydraulic cylinder (1005) is installed on the inner wall of the desulfurization device body (1) below the conical annular cavity, and the plug plate (1003) is connected to the telescopic end of the hydraulic cylinder (1005) through the second connecting rod (1004); the blanking chute (1002) is fixedly connected to the first connecting rod (704).

8. The fixed bed desulfurization device with automatic loading and unloading according to claim 7 is characterized in that: The transmission part (11) comprises a rotating shaft (1101), a cam (1102), an impeller (1103) and a stand (1104), wherein the rotating shaft (1101) is aligned with the pipe opening of the air inlet pipe (2) and is rotatably sleeved on the center of the stand (1104); the stand (1104) is installed in the flow guide cabin; the impeller (1103) located in the stand (1104) is coaxially sleeved with the rotating shaft (1101); both ends of the rotating shaft (1101) are fixedly sleeved with cams (1102); and the blanking trough (1002) that sinks into the flow guide cabin is intermittently squeezed by the rotating cam (1102) and oscillates.

9. The fixed bed desulfurization device with automatic loading and unloading according to claim 7 is characterized in that: The top surface of the material drop chute (1002) is configured as a slope structure that slopes downward toward the periphery.

10. The fixed bed desulfurization device with automatic loading and unloading according to claim 1, characterized in that: The air inlet pipe (2) and the exhaust pipe (3) are respectively equipped with a flue gas inlet SO2 detector and a flue gas outlet SO2 detector. A control system (12) is also installed on the side wall of the desulfurization device body (1). The output ends of the flue gas inlet SO2 detector and the flue gas outlet SO2 detector are electrically connected to the input end of the control system (12). By analyzing the difference in SO2 concentration between the inlet and outlet, it is determined whether material replacement is required.

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