Regeneration device and regeneration method for blast furnace gas desulfurizer

Abstract

The application provides a blast furnace gas desulfurizer regeneration device and a regeneration method, and belongs to the technical field of blast furnace gas fine desulfurization, wherein the blast furnace gas desulfurizer regeneration device comprises a regeneration box body, and the regeneration box body is internally provided with a buffer chamber, a reaction chamber and a material conveying chamber; the buffer chamber is communicated with a circulating water pool; the buffer chamber and the reaction chamber are communicated through a flow passage, and the flow passage is internally provided with a first switch; the reaction chamber is communicated with a feeding pipe; the reaction chamber is internally provided with a first liquid return pipe; the material conveying chamber is communicated with the lower part of the reaction chamber through a flow port and a second switch, and the lower end surface of the material conveying chamber is provided with a first material conveying port and a second material conveying port provided with a filter screen. The blast furnace gas desulfurizer regeneration device and the regeneration method provided by the application realize the regeneration of the desulfurizer in the circulating water by setting the buffer chamber, the reaction chamber and the material conveying chamber to react the circulating water with the iron salt, to generate the precipitation by reacting the sulfur in the circulating water, to reduce the sulfur content in the circulating water and to reduce the desulfurizer.

Description

Technical Field

[0001] This invention belongs to the field of blast furnace gas desulfurization technology, and more specifically, relates to a blast furnace gas desulfurizing agent regeneration device and regeneration method. Background Technology

[0002] Currently, the mainstream desulfurization process for blast furnace gas is the conversion + wet desulfurization process. Wet desulfurization uses water as the medium and methyldiethanolamine as the desulfurizing agent. The organic sulfur conversion agent converts COS and CS2 in the gas into H2S. At the same time, the strongly acidic hydrogen chloride in the gas reacts with the desulfurizing agent to form salts that dissolve in the desulfurizing agent. The basic principle of methyldiethanolamine desulfurization is as follows: 2R3NH + H2S → 2R3NH2HS; (R3NH)2S + H2S → 2R3NH2HS.

[0003] Existing wet desulfurization systems include a conversion tower, an acid washing tower, and a circulating water tank. The conversion tower contains an organic sulfur conversion agent that converts COS and CS2 in the coal gas into H2S, and the converted coal gas is then transported to the acid washing tower. Circulating water from the circulating water tank passes through the acid washing tower, where the desulfurizing agent reacts with hydrogen sulfide in the coal gas to form soluble salts that are retained in the circulating water. The reacted circulating water then flows back to the circulating water tank. However, during long-term operation of wet desulfurization systems, sulfur accumulates in the circulating water, leading to a decrease in the sulfur capacity of the circulating water in the tank and resulting in sulfur dioxide exceeding standards at the end-user level. Summary of the Invention

[0004] The purpose of this invention is to provide a blast furnace gas desulfurizer regeneration device and regeneration method, which aims to solve the problem of sulfur enrichment in circulating water due to the inability of the desulfurizer to be reduced after reaction.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a blast furnace gas desulfurizing agent regeneration device and regeneration method, comprising:

[0006] The regeneration chamber includes a buffer chamber, a reaction chamber, and a conveying chamber. The buffer chamber is connected to a circulating water tank via an inlet pipe. The buffer chamber and the reaction chamber are connected via a flow channel, which contains a first switch. The reaction chamber is connected to a feed pipe for adding iron salts to the circulating water within the reaction chamber. The reaction chamber has a first return pipe extending to the lower part of the reaction chamber and connecting to the circulating water tank. The conveying chamber is connected to the lower part of the reaction chamber via a flow port and a second switch located within the flow port. The conveying chamber has an inclined lower end face, with a first conveying port and a second conveying port equipped with a filter screen on the lower end face. The first conveying port is located above the second conveying port. The conveying chamber contains a conveying auger, the axis of which is parallel to the lower end face of the conveying chamber. The first conveying port is connected to a sludge press.

[0007] In another embodiment of this application, the flow channel is connected to the middle of the buffer chamber.

[0008] In another embodiment of this application, a partition is provided between the buffer chamber and the reaction chamber. The partition includes a lower partition and an upper partition, which are spaced apart to form the flow channel. The lower end of the upper partition is provided with a mounting cavity, and the first switch passes through the lower end of the mounting cavity and is connected to a telescopic component inside the mounting cavity. The first switch moves longitudinally to open and close the flow channel.

[0009] In another embodiment of this application, the second switch includes a hinge shaft disposed in the middle of the flow port, two blades are rotatably connected to the hinge shaft, and a limiting plate is provided above the hinge shaft, the limiting plate being in contact with the upper end surfaces of the two blades.

[0010] In another embodiment of this application, the first return pipe includes:

[0011] A connecting section, which is attached to the side wall of the reaction chamber;

[0012] The water-absorbing section is located at the lower end of the connecting section. The water-absorbing section is U-shaped, and a water-absorbing port is provided at the end of the water-absorbing section away from the connecting section. The water-absorbing port is provided with a filter layer.

[0013] In another embodiment of this application, the reaction chamber is surrounded by a cooling jacket, and the cooling jacket has a cooling cavity or is provided with spiral cooling water pipes.

[0014] As another embodiment of this application, it also includes:

[0015] The reduction chamber is located inside the regeneration tank and is connected to the reaction chamber via a connecting pipe. An electric heater is provided on the side wall of the reduction chamber. A second return pipe connected to the circulating water tank is provided inside the reduction chamber. An air suction pipe is provided at the top of the reduction chamber.

[0016] In another embodiment of this application, the side wall of the reduction chamber is provided with a plurality of spiral heat-conducting rings, and the electric heater is disposed within the heat-conducting rings.

[0017] In another embodiment of this application, the outer side of the reduction chamber is provided with a heat insulation layer.

[0018] The beneficial effects of the blast furnace gas desulfurizer regeneration device provided by the present invention are as follows: Compared with the prior art, the blast furnace gas desulfurizer regeneration device of the present invention realizes the reaction of circulating water with iron salt by setting up a buffer chamber, a reaction chamber and a conveying chamber, and the sulfur in the circulating water reacts to form a precipitate, thereby realizing the regeneration of the desulfurizer in the circulating water, reducing the sulfur content in the circulating water and reducing the desulfurizer, realizing the recycling of the desulfurizer in the circulating water, and improving the desulfurization effect of the circulating water.

[0019] A method for regenerating blast furnace gas desulfurizing agent is also provided, which uses the above-mentioned blast furnace gas desulfurizing agent regeneration device and includes the following steps:

[0020] S1. Water from the circulating water tank enters the reaction chamber through the buffer chamber;

[0021] S2. Iron salts are added to the reaction chamber through the feed pipe, and circulating water reacts with the iron salts to generate FeS precipitate.

[0022] S3. The circulating water after the reaction is transported from the first return pipe to the circulating water tank or enters the reduction chamber through the connecting pipe.

[0023] S4. The circulating water entering the reduction chamber reacts under the action of the electric heater, and the reacted circulating water is transported to the circulating water tank through the second return pipe.

[0024] The beneficial effects of the blast furnace gas desulfurizer regeneration method provided by the present invention are as follows: Compared with the prior art, the blast furnace gas desulfurizer regeneration method of the present invention adopts the above-mentioned blast furnace gas desulfurizer regeneration device, and has all the beneficial effects of the blast furnace gas desulfurizer regeneration device; the blast furnace gas desulfurizer regeneration method provided by the present invention is used to discharge sulfur from sulfur-rich circulating water, reduce the sulfur content in the circulating water, complete the reduction of desulfurizer in the circulating water, and improve the desulfurization efficiency of the circulating water. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the blast furnace gas desulfurizing agent regeneration device provided in the first embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the blast furnace gas desulfurizing agent regeneration device provided in the second embodiment of the present invention;

[0028] Figure 3This is a schematic diagram of the blast furnace gas desulfurizing agent regeneration device provided in the third embodiment of the present invention.

[0029] In the diagram: 10. Regeneration tank; 11. Cooling jacket; 12. Inlet pipe; 13. Outlet pipe; 14. Upper partition; 15. Mounting cavity; 16. Lower partition; 17. First switch; 18. Telescopic assembly; 19. Cooling water pipe; 20. Buffer chamber; 21. Liquid inlet pipe; 22. Low level switch; 23. High level switch; 24. Main level switch; 25. Drain pipe; 30. Reaction chamber; 31. Stirring device; 32. First return pipe; 33. Inlet; 34. Blade; 35. Hinge shaft; 36. Limiting plate; 37. Inclined block; 38. First feed pipe; 39. Second feed pipe; 40. Conveying chamber; 41. Conveying auger; 42. First feed port; 43. Second feed port; 44. Filter screen; 50. Reduction chamber; 51. Insulation layer; 52. Suction pipe; 53. Heat-conducting ring; 54. Heating wire; 55. Second return pipe; 56. Third switch; 57. Connecting pipe. Detailed Implementation

[0030] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0031] Please see Figures 1 to 3 The present invention will now describe the blast furnace gas desulfurizer regeneration device and regeneration method provided by the present invention. The blast furnace gas desulfurizer regeneration device includes a regeneration chamber 10, which contains a buffer chamber 20, a reaction chamber 30, and a conveying chamber 40. The buffer chamber 20 is connected to a circulating water tank via an inlet pipe 21. The buffer chamber 20 and the reaction chamber 30 are connected via a flow channel, and a first switch 17 is provided in the flow channel. The reaction chamber 30 is connected to a feed pipe for adding iron salts to the circulating water within the reaction chamber 30. A first return pipe 32 is provided within the reaction chamber 30. The material conveying chamber 40 extends to the lower part of the reaction chamber 30 and is connected to the circulating water tank; the material conveying chamber 40 is connected to the lower part of the reaction chamber 30 by means of a second switch. The material conveying chamber 40 has an inclined lower end face. The lower end face of the material conveying chamber 40 is provided with a first material conveying port 42 and a second material conveying port 43 provided with a filter screen 44. The first material conveying port 42 is located above the second material conveying port 43. The material conveying chamber 40 has a conveying auger 41. The axis of the conveying auger 41 is parallel to the lower end face of the material conveying chamber 40. The first material conveying port 42 is connected to the mud press.

[0032] The blast furnace gas desulfurizer regeneration device provided by this invention, compared with the prior art, has a regeneration tank 10 divided into a buffer chamber 20, a reaction chamber 30, and a conveying chamber 40 connected in sequence. Circulating water from the circulating water tank enters the buffer chamber 20 through the inlet pipe 21 and accumulates there. When the circulating water volume in the buffer chamber 20 reaches a certain height, the first switch 17 is opened, and the circulating water enters the reaction chamber 30 through the flow channel. The amount of iron salt conveyed to the reaction chamber 30 by the feed pipe is determined and controlled based on the amount of circulating water entering the reaction chamber 30. The circulating water and iron salt react in the reaction chamber 30 to generate a precipitate. The specific reaction process is as follows: S 2- +Fe 2+ →FeS↓.

[0033] After the circulating water in the reaction chamber 30 reacts with the iron salt, the resulting precipitate will sink to the bottom of the reaction chamber 30. After the reaction, the sulfur in the circulating water is removed, the desulfurizing agent is reduced, and the circulating water after the reaction is transported to the circulating water pool through the first return pipe 32.

[0034] The precipitate generated by the reaction will accumulate at the bottom of the reaction chamber 30. When the second switch is opened, the precipitate and a small amount of circulating water will enter the conveying chamber 40. The circulating water flows downward along the lower end of the conveying chamber 40 until it is discharged from the second conveying port 43. The precipitate and a very small amount of circulating water are conveyed by the conveying auger 41 to the first conveying port 42 and discharged from the first conveying port 42 to the mud press.

[0035] The blast furnace gas desulfurizer regeneration device provided by the present invention realizes the reaction of circulating water with iron salt by setting up a buffer chamber 20, a reaction chamber 30 and a conveying chamber 40, thereby reacting the sulfur in the circulating water to form a precipitate, regenerating the desulfurizer in the circulating water, reducing the sulfur content in the circulating water and reducing the desulfurizer, realizing the recycling of the desulfurizer in the circulating water and improving the desulfurization effect of the circulating water.

[0036] Optionally, the side wall of the buffer chamber 20 is provided with a low-level switch 22 and a high-level switch 23 at intervals from bottom to top. When the water level in the buffer chamber 20 reaches the high-level switch 23, the first switch 17 is opened; when the water level in the buffer chamber 20 drops to the low-level switch 22, the first switch 17 is closed. Optionally, the low-level switch 22 is located on the upper end face of the flow channel; the high-level switch 23 is located in the upper part of the buffer chamber 20.

[0037] Optionally, the low level switch 22, the high level switch 23, and the first switch 17 are all electrically connected to the controller.

[0038] Optionally, a main liquid level switch 24 is installed on the side wall of the reaction chamber 30. The main liquid level switch 24 is electrically connected to the controller. When the liquid level in the reaction chamber 30 reaches the main liquid level switch 24, the controller controls the first switch 17 to close. The main liquid level switch 24 is located above the low liquid level switch 22 and below the high liquid level switch 23.

[0039] Optionally, a solenoid valve is provided on the inlet pipe 21, and the solenoid valve is connected to the controller.

[0040] Optionally, a first feed pipe 38 and a second feed pipe 39 are provided at the upper part of the reaction chamber 30, wherein the first feed pipe 38 is used to add iron salt into the reaction chamber 30, and the second feed pipe 39 is used to add flocculant into the reaction chamber 30. The flocculant facilitates the precipitation after the reaction.

[0041] Optionally, the lower end of the buffer chamber 20 is provided with a drain pipe 25, which connects to the conveying chamber 40.

[0042] In some possible embodiments, please refer to Figures 1 to 3 The flow channel connects to the middle of the buffer chamber 20.

[0043] Specifically, buffer chamber 20 and reaction chamber 30 are arranged side by side and separated by a partition. A flow channel is provided on the partition, connecting buffer chamber 20 and reaction chamber 30. The flow channel is horizontally positioned in the middle of the partition, connecting the middle of buffer chamber 20 and reaction chamber 30. Circulating water first enters buffer chamber 20 through inlet pipe 21 and accumulates there until the liquid level in buffer chamber 20 reaches the high level switch 23. At this point, the first switch 17 is opened, and the circulating water in buffer chamber 20 enters reaction chamber 30 through the flow channel.

[0044] The flow channel is located in the middle of the buffer chamber 20 to ensure that a certain amount of circulating water is always present in the buffer chamber 20. The chemical reaction in the reaction chamber 30 is exothermic, while the methyldiethanolamine desulfurization reaction is reversible. At 20-40℃, the reaction proceeds in the forward direction; above 105℃, the reaction proceeds in the reverse direction, potentially leading to amine salt decomposition. To avoid amine salt decomposition in the reaction chamber 30, and to only allow the reaction between the amine salt and the iron salt, the temperature in the reaction chamber 30 must be kept below 105℃, or even lower. Therefore, retaining a portion of circulating water in the buffer chamber 20 achieves the purpose of heat transfer and cooling of the reactants in the reaction chamber 30.

[0045] In addition, the reaction chamber 30 needs to be in a closed environment. Therefore, the first switch 17 will only be opened after the water level in the buffer chamber 20 is higher than a certain height in the flow channel, so as to ensure that the amount of circulating water entering the reaction chamber 30 is sufficient for one reaction.

[0046] In some possible embodiments, please refer to Figures 1 to 3 A partition is provided between the buffer chamber 20 and the reaction chamber 30. The partition includes a lower partition 16 and an upper partition 14, which are spaced apart to form a flow channel. The lower end of the upper partition 14 is provided with a mounting cavity 15. A first switch 17 passes through the lower end of the mounting cavity 15 and is connected to a telescopic component 18 inside the mounting cavity 15. The first switch 17 moves longitudinally to open and close the flow channel.

[0047] The buffer chamber 20 and the reaction chamber 30 are separated by an upper partition 14 and a lower partition 16, forming a flow channel between them. A mounting cavity 15 is provided at the lower end of the upper partition 14, with a port at the lower end of the mounting cavity 15 to accommodate the passage of the first switch 17. A telescopic assembly 18 is installed inside the mounting cavity 15, with the telescopic direction being longitudinal; the lower end of the telescopic assembly 18 is connected to the upper end of the first switch 17.

[0048] The first switch 17 includes a top plate and a main body. The top plate is located inside the mounting cavity 15, and the side wall of the top plate slides along the side wall of the mounting cavity 15. The main body extends through the port at the lower end of the mounting cavity 15, and the side wall of the main body fits against the port. The lower end of the main body has a V-shaped end. A V-shaped limiting groove adapted to the end is provided at the upper end of the lower partition 16.

[0049] Optionally, the telescopic component 18 can be a cylinder, etc.

[0050] In some possible embodiments, please refer to Figures 1 to 3 The second switch includes a hinge shaft 35 located in the middle of the flow port, two blades 34 are rotatably connected to the hinge shaft 35, and a limiting plate 36 is provided above the hinge shaft 35, which is in contact with the upper end face of the two blades 34.

[0051] The conveying chamber 40 is located below the reaction chamber 30. An outlet is provided at the bottom of the reaction chamber 30, connecting to the upper part of the conveying chamber 40. The precipitate generated in the reaction chamber 30 enters the conveying chamber 40 through the outlet. A second switch is located at the outlet, controlling its opening and closing.

[0052] Specifically, the cross-section of the flow outlet is circular. A hinge shaft 35 is located in the center of the flow outlet, and the diameter of the hinge shaft 35 coincides with that of the flow outlet. Two blades 34 are hinged to the hinge shaft 35, and both blades 34 rotate around the hinge shaft 35. Sealing gaskets are provided at the edges of the two blades 34, and the gaskets are in contact with the sidewall of the flow outlet to achieve a seal. A limiting plate 36 is provided above the hinge shaft 35, and a sealing gasket is provided at the lower end of the limiting plate 36. When the two blades 34 are unfolded, the two blades 34 block the entire flow outlet, and the upper end surfaces of the two blades 34 are in contact with the sealing gasket at the lower end of the limiting plate 36 to prevent circulating water from passing through.

[0053] Optionally, an inclined block 37 is provided at the lower end of the reaction chamber 30. The inclined block 37 is located around the flow port, and the height of the inclined block 37 gradually increases from the center to the periphery. Under the action of the inclined block 37, a funnel-shaped structure is formed at the bottom of the reaction chamber 30.

[0054] Optionally, the reaction chamber 30 includes a stirring structure comprising a stirring rod and a support rod, the support rod being connected to the stirring rod and extending radially outward. During the chemical reaction within the reaction chamber 30, the stirring structure accelerates the mixing of circulating water and iron salts, thereby improving the efficiency of the chemical reaction.

[0055] In some possible embodiments, please refer to Figures 1 to 3 The first return pipe 32 includes a connecting section and a water absorption section; the connecting section is attached to the side wall of the reaction chamber 30; the water absorption section is located at the lower end of the connecting section, the water absorption section is U-shaped, and a water intake 33 is provided at the end of the water absorption section away from the connecting section, and the water intake 33 is provided with a filter layer.

[0056] The first return pipe 32 connects the reaction chamber 30 and the circulating water tank. The end of the first return pipe 32 extends into the reaction chamber 30, and the portion of the first return pipe 32 extending into the reaction chamber 30 is divided into a connecting section and a water absorption section. The connecting section is located on the inner wall of the reaction chamber 30 and is arranged longitudinally. A water absorption section is connected to the lower end of the connecting section. The water absorption section is U-shaped, with its closed end facing downwards. One side of the U-shaped water absorption section is connected to the lower end of the connecting section, and a water inlet 33 is provided on the pipe wall of the other side. A filter layer is provided at the water inlet 33.

[0057] The U-shaped water absorption section minimizes the impact on the bottom sediment during water absorption, preventing sediment from entering the water absorption section.

[0058] Optionally, the closed end of the water absorption section is located above the inclined block 37.

[0059] In some possible embodiments, please refer to Figures 1 to 3 The reaction chamber 30 is surrounded by a cooling jacket 11, which has a cooling cavity or is provided with spiral cooling water pipes 19.

[0060] like Figure 1 As shown, a cooling jacket 11 covers the outside of the reaction chamber 30 and the buffer chamber 20, and the cooling jacket 11 cools the circulating water in both the buffer chamber 20 and the reaction chamber 30. The cooling jacket 11 has a cooling chamber, the upper end of which is connected to a water inlet pipe 12, and the lower end of which is connected to a water outlet pipe 13; cooling water enters the cooling chamber from the water inlet pipe 12 and is discharged from the water outlet pipe 13 after passing through the cooling chamber.

[0061] The cooling water not only cools the reaction chamber 30, but also the buffer chamber 20. By lowering the temperature of the circulating water in the buffer chamber 20, the temperature of the circulating water entering the reaction chamber 30 is reduced, thus preventing the reverse reaction of amine salts from occurring in the circulating water.

[0062] like Figure 2 As shown, a spiral cooling water pipe 19 is provided inside the cooling jacket 11. The cooling water pipe 19 flows from bottom to top and exchanges heat with the circulating water in the buffer chamber 20 and the reaction chamber 30.

[0063] In some possible embodiments, please refer to Figure 3 The blast furnace gas desulfurizer regeneration device also includes a reduction chamber 50; the reduction chamber 50 is located inside the regeneration box 10 and is connected to the reaction chamber 30 via a connecting pipe 57; an electric heater is provided on the side wall of the reduction chamber 50; a second return pipe 55 connected to the circulating water tank is provided inside the reduction chamber 50; and an air suction pipe 52 is provided at the top of the reduction chamber 50.

[0064] The circulating water in reaction chamber 30, after reacting with iron salts, also contains a significant amount of desulfurizing agent and a relatively small amount of amine salts. The reacted circulating water then enters reduction chamber 50 for secondary regeneration and reduction. Under heating conditions, the amine salts in the circulating water can undergo a reverse reaction.

[0065] In the reverse reaction, the amine salts in the circulating water generate gas, which is then discharged through the suction pipe 52 or sent to other equipment for centralized treatment. The circulating water after the reaction is directly transported to the circulating water pool through the second return pipe 55 for use in circulating desulfurization.

[0066] Optionally, a drain outlet is provided at the bottom of the reduction chamber 50, which is connected to the conveying chamber 40 and used to discharge impurities and sediments from the bottom of the reduction chamber 50. A third switch 56 is provided at the drain outlet, and the structure of the third switch 56 can be the same as that of the second switch.

[0067] In some possible embodiments, please refer to Figure 3 Multiple spiral heat-conducting rings 53 are provided on the side wall of the reduction chamber 50, and an electric heater is located inside the heat-conducting rings 53.

[0068] A heat-conducting ring 53 is arranged spirally from top to bottom on the inner wall of the reduction chamber 50. There is a heating cavity between the heat-conducting ring 53 and the side wall of the reduction chamber 50. An electric heater is installed in the heating cavity. The electric heater can be an electric heating wire.

[0069] Optionally, the heat-conducting ring 53 has a semi-circular cross-section. The heat-conducting ring 53 protrudes into the inner cavity of the reduction chamber 50, and the arc-shaped outer wall of the heat-conducting ring 53 increases the contact area between it and the circulating water, thereby improving the heating effect.

[0070] A stirring device 31 is also installed in the reduction chamber 50. This stirring device 31 can be of the same structure as the stirring device 31 in the reaction chamber 30. The stirring device 31 improves the disturbance state of the circulating water in the reduction chamber 50, enhances the heat conduction effect, and ensures a uniform temperature distribution of the circulating water in the reduction chamber 50.

[0071] The electric heater is a heating wire 54.

[0072] A heat insulation layer 51 is provided on the outside of the reduction chamber 50. The heat insulation layer 51 is mainly distributed between the reduction chamber 50 and the reaction chamber 30, specifically between the reduction chamber 50 and the cooling jacket 11, to prevent the high temperature inside the reduction chamber 50 from affecting the cooling effect of the cooling jacket 11.

[0073] Optionally, a heat insulation layer 51 is wrapped around the outside of the reduction chamber 50.

[0074] Please refer to Figures 1 to 3 The present invention also provides a method for regenerating blast furnace gas desulfurizing agent, which uses the above-mentioned blast furnace gas desulfurizing agent regeneration device and includes the following steps:

[0075] S1. Water from the circulating water tank enters the reaction chamber 30 through the buffer chamber 20;

[0076] S2. Iron salt is added to the reaction chamber 30 through the feed pipe. The circulating water reacts with the iron salt to generate FeS precipitate.

[0077] S3. The circulating water after the reaction is transported from the first return pipe 32 to the circulating water tank or enters the reduction chamber 50 through the connecting pipe 57.

[0078] S4. The circulating water entering the reduction chamber 50 reacts under the action of the electric heater, and the reacted circulating water is transported to the circulating water pool through the second return pipe 55.

[0079] Circulating water enters the buffer chamber 20 through the inlet pipe 21 and accumulates there until the water level in the buffer chamber 20 rises to the high level switch 23. When the water level rises to the high level switch 23 in the buffer chamber 20, the controller opens the first switch 17, and the circulating water in the buffer chamber 20 enters the reaction chamber 30 through the flow channel. When the water level in the reaction chamber 30 reaches the main level switch 24 in the reaction chamber 30 or the water level in the buffer chamber 20 falls below the low level switch 22, the first switch 17 closes.

[0080] The upper part of the reaction chamber 30 is equipped with at least a first feed pipe 38 and a second feed pipe 39. After the circulating water enters the reaction chamber 30, the first feed pipe 38 adds iron salts to the reaction chamber 30. Under the action of the stirring device 31, the iron salts react fully with the amine salts in the circulating water in the reaction chamber 30. Under the action of the cooling jacket 11, the amine salts can only react with the iron salts and will not undergo their own reverse reaction. During the reaction process, the second feed pipe 39 adds flocculant to the reaction chamber 30. The flocculant reacts with the precipitate generated in the circulating water to quickly flocculate and settle, accumulating at the bottom of the reaction chamber 30. The desulfurizing agent in the reduced circulating water is then reduced.

[0081] After the reaction is complete in reaction chamber 30, a large amount of precipitate and reduced circulating water are generated. The circulating water can directly enter the circulating water tank through the first return pipe 32, or it can enter the reduction chamber 50 through the connecting pipe 57 for secondary reduction. Optionally, the criterion for judging whether the reacted circulating water enters the first return pipe 32 or the reduction chamber 50 is the concentration of sulfur ions in the reacted circulating water. The detection method can be through sample extraction and detection, etc., which will not be elaborated here.

[0082] After the circulating water in the reaction chamber 30 enters the reduction chamber 50, the reverse reaction of the amine salt is achieved by heating in the reduction chamber 50. During the reverse reaction, gases such as H2S and CO2 and the desulfurizing agent are generated. The generated gases are discharged through the suction pipe 52. The generated precipitates or impurities are discharged through the drain outlet into the conveying chamber 40. Finally, the completely reacted circulating water is transported to the circulating water pool.

[0083] The sediment entering the conveying chamber 40 through the reaction chamber 30 or reduction chamber 50 is conveyed upward by the conveying auger 41 to the first conveying port 42 for discharge, and then conveyed to the sludge press. The circulating water entering the conveying chamber 40 flows downward along the lower end of the conveying chamber until the circulating water passes through the filter screen 44 and is discharged from the second conveying port 43.

[0084] The blast furnace gas desulfurizer regeneration method provided by this invention, compared with the prior art, adopts the above-mentioned blast furnace gas desulfurizer regeneration device and has all the beneficial effects of the blast furnace gas desulfurizer regeneration device; the blast furnace gas desulfurizer regeneration method provided by this invention is used to discharge sulfur from sulfur-rich circulating water, reduce the sulfur content in the circulating water, complete the reduction of desulfurizer in the circulating water, and improve the desulfurization efficiency of the circulating water.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A blast furnace gas desulfurizing agent regeneration device, characterized in that, include: The regeneration chamber includes a buffer chamber, a reaction chamber, and a conveying chamber. The buffer chamber is connected to a circulating water tank via an inlet pipe. The buffer chamber and the reaction chamber are connected via a flow channel, which contains a first switch. The reaction chamber is connected to an inlet pipe for adding iron salts to the circulating water within the reaction chamber. The reaction chamber has a first return pipe extending to the lower part of the reaction chamber and connecting to the circulating water tank. The conveying chamber is connected to the lower part of the reaction chamber via a flow port and a second switch located within the flow port. The conveying chamber has an inclined lower end face, with a first conveying port and a second conveying port equipped with a filter screen on the lower end face. The first conveying port is located above the second conveying port. The conveying chamber contains a conveying auger, the axis of which is parallel to the lower end face of the conveying chamber. The first feed inlet is connected to the mud press; Also includes: The reduction chamber is located inside the regeneration tank and is connected to the reaction chamber via a connecting pipe. An electric heater is provided on the side wall of the reduction chamber. A second return pipe connected to the circulating water tank is provided inside the reduction chamber. An air suction pipe is provided at the top of the reduction chamber.

2. The blast furnace gas desulfurizing agent regeneration device as described in claim 1, characterized in that, The flow passage connects to the middle of the buffer chamber.

3. The blast furnace gas desulfurizing agent regeneration device as described in claim 1, characterized in that, A partition is provided between the buffer chamber and the reaction chamber. The partition includes a lower partition and an upper partition, which are spaced apart to form the flow channel. The lower end of the upper partition is provided with a mounting cavity. The first switch passes through the lower end of the mounting cavity and is connected to a telescopic component inside the mounting cavity. The first switch moves longitudinally to open and close the flow channel.

4. The blast furnace gas desulfurizing agent regeneration device as described in claim 1, characterized in that, The second switch includes a hinge shaft located in the middle of the flow port, two blades are rotatably connected to the hinge shaft, and a limiting plate is provided above the hinge shaft, the limiting plate being in contact with the upper end surfaces of the two blades.

5. The blast furnace gas desulfurizing agent regeneration device as described in claim 1, characterized in that, The first return pipe includes: A connecting section, which is attached to the side wall of the reaction chamber; The water-absorbing section is located at the lower end of the connecting section. The water-absorbing section is U-shaped, and a water-absorbing port is provided at the end of the water-absorbing section away from the connecting section. The water-absorbing port is provided with a filter layer.

6. The blast furnace gas desulfurizing agent regeneration device as described in claim 1, characterized in that, The reaction chamber is surrounded by a cooling jacket, which contains a cooling cavity or is equipped with spiral cooling water pipes.

7. The blast furnace gas desulfurizing agent regeneration device as described in claim 1, characterized in that, The side wall of the reduction chamber is provided with multiple spiral heat-conducting rings, and the electric heater is located inside the heat-conducting rings.

8. The blast furnace gas desulfurizing agent regeneration device as described in claim 1, characterized in that, The outside of the reduction chamber is equipped with a heat insulation layer.

9. A method for regenerating desulfurizing agent for blast furnace gas, characterized in that, The blast furnace gas desulfurizing agent regeneration device as described in claim 1 includes the following steps: S1. Water from the circulating water tank enters the reaction chamber through the buffer chamber; S2. Iron salts are added to the reaction chamber through the feed pipe, and circulating water reacts with the iron salts to generate FeS precipitate. S3. The circulating water after the reaction is transported from the first return pipe to the circulating water tank or enters the reduction chamber through the connecting pipe. S4. The circulating water entering the reduction chamber reacts under the action of the electric heater, and the reacted circulating water is transported to the circulating water tank through the second return pipe.

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