Coke oven flue gas desulfurization equipment based on gas-solid separation

Abstract

The invention discloses coke oven flue gas desulfurization equipment based on gas-solid separation, and relates to the technical field of environmental protection engineering.The flue gas desulfurization equipment comprises a stock bin, a feeder, a powder feeding system, a desulfurization reactor and a deduster, the stock bin is communicated with the feeder, an inlet of the powder feeding system is communicated with an outlet of the feeder, an outlet of the powder feeding system is communicated with the desulfurization reactor, and the deduster is communicated with the deduster. The powder feeding system is used for conveying sodium bicarbonate into the desulfurization reactor to desulfurize flue gas, an outlet of the desulfurization reactor is communicated with the dust remover, the flue gas in the desulfurization reactor reacts with sodium bicarbonate to generate desulfurization particles, and the dust remover is used for separating the desulfurization particles; the powder feeding system uniformly sprays powder into the desulfurization reactor in a pneumatic conveying manner, so that the powder is fully mixed with flue gas containing sulfur dioxide, sodium bicarbonate powder can react with sulfur dioxide under proper conditions, so that sulfur dioxide in the flue gas is removed, and finally solid reaction products in the purified flue gas are removed through the dust remover. And gas-solid separation is realized.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection engineering, in particular to a coke oven flue gas desulfurization device based on gas-solid separation. Background Art

[0002] Coke ovens are the core equipment used to produce coke. The flue gas produced during the production process contains large amounts of pollutants such as sulfur dioxide and particulate matter, posing a serious threat to the environment and human health. With increasingly stringent environmental regulations, desulfurization of coke oven flue gas is required before it is discharged.

[0003] Currently, common technologies for flue gas desulfurization mainly include wet desulfurization (such as the limestone-gypsum method) and semi-dry desulfurization (such as the spray drying method). Although wet desulfurization has a high desulfurization efficiency (reaching over 95%), it has problems such as complex equipment, high investment and operating costs, and difficult wastewater treatment. It also has high site requirements and is difficult to adapt to coke oven flue gas conditions. Although the equipment for semi-dry desulfurization is relatively simple, the mixing efficiency of the reactants and flue gas is low, which can easily lead to insufficient utilization of the desulfurizer and incomplete reaction. It also has poor adaptability to fluctuations in flue gas parameters, making it difficult to ensure stable emission standards. In addition, traditional desulfurization equipment generally has the following problems: Single reaction path: The fixed flow channel design cannot dynamically adjust the reaction time according to the sulfur dioxide concentration in the flue gas, resulting in incomplete desulfurization under high concentration conditions and energy waste under low concentration conditions; Low mixing efficiency: The static mixing structure makes it difficult to achieve sufficient contact between flue gas and desulfurizer, affecting the reaction rate; Large equipment size: To extend the residence time of flue gas, the reactor height or length often needs to be increased, resulting in a large footprint and restricting on-site deployment; Based on this, it is urgent to develop a new type of desulfurization equipment to meet the dual needs of efficient treatment and resource utilization of coke oven flue gas. Summary of the Invention

[0004] The object of the present invention is to provide a coke oven flue gas desulfurization device based on gas-solid separation to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: The present invention provides a technical solution for coke oven flue gas desulfurization equipment based on gas-solid separation, the flue gas desulfurization equipment including a silo, a feeder, a powder feeding system, a desulfurization reactor and a dust collector, the silo is connected to the feeder, the inlet of the powder feeding system is connected to the outlet of the feeder, the outlet of the powder feeding system is connected to the desulfurization reactor, the powder feeding system is used to transport sodium bicarbonate into the desulfurization reactor to desulfurize the flue gas, the outlet of the desulfurization reactor is connected to the dust collector, the flue gas in the desulfurization reactor reacts with sodium bicarbonate to generate desulfurization particles, and the dust collector is used to separate the desulfurization particles.

[0006] The silo is used to store sodium bicarbonate powder. When desulfurizing the flue gas, the feeder transports the sodium bicarbonate powder to the powder delivery system. The powder delivery system uses pneumatic conveying to evenly spray the powder into the desulfurization reactor, so that it is fully mixed with the flue gas containing sulfur dioxide. The sodium bicarbonate powder can react with sulfur dioxide under suitable conditions to remove sulfur dioxide from the flue gas. Finally, the solid reaction products in the purified flue gas are removed by the dust collector to achieve gas-solid separation.

[0007] Furthermore, the desulfurization reactor includes a shell, which is provided with an air inlet and an air outlet. The air inlet is externally connected to the coke oven flue gas outlet, the air inlet is connected to the powder feeding system, and the air outlet is connected to the dust collector.

[0008] The outer shell is used to protect the components inside the desulfurization reactor and provide a channel for the flow of flue gas. The coke oven flue gas that needs to be treated enters the desulfurization reactor through the air inlet for treatment. The powder feeding system injects sodium bicarbonate powder into the air inlet by pneumatic conveying, thereby mixing with the flue gas. The treated flue gas is transferred to the dust collector through the air outlet.

[0009] Furthermore, an upper partition, a lower partition, a mixing assembly, an adjusting assembly and a baffle assembly are provided in the shell. A gas flow channel is formed between the upper partition and the lower partition. A plurality of guide holes are provided on the upper partition, which are connected to the gas flow channel. The mixing assembly is inserted between the upper partition and the lower partition. The mixing assembly is used to promote the mixing of flue gas and sodium bicarbonate powder. The adjusting assembly is connected to the mixing assembly. The adjusting assembly is used to adjust the flow state of the flue gas. A dust collection box is provided at the bottom of the shell. A gas analyzer is provided at the air inlet. The gas analyzer is used to detect the sulfur dioxide content in the flue gas. The baffle assembly is connected to the upper partition. The baffle assembly can automatically adjust the flow distance of the flue gas in the gas flow channel according to the sulfur dioxide content in the flue gas, thereby promoting the reaction of the flue gas and sodium bicarbonate.

[0010] The gas flow channel formed between the upper baffle and the lower baffle can extend the flow distance of the flue gas in the desulfurization reactor, so that the sulfur dioxide in the flue gas can be completely reacted with sodium bicarbonate, so that the emitted gas meets the standard. The mixing component is used to provide space for the mixing of flue gas and sodium bicarbonate; when the gas analyzer detects fluctuations in the sulfur dioxide content in the flue gas, the flow channel distance in the mixing component is shorter, so that the sulfur dioxide cannot be completely reacted. The flue gas is guided to the gas flow channel by the adjustment component, and the flow distance of the flue gas is extended, so that the sulfur dioxide in the flue gas is completely reacted. The baffle component can automatically adjust the length of the gas flow channel according to the sulfur dioxide content, so as to ensure complete reaction; the gas flow channel can extend the flow distance of the flue gas without increasing the height of the desulfurization reactor, thereby improving the applicability of the equipment.

[0011] Furthermore, the mixing assembly includes a rotating tube and a driving motor. The rotating tube is rotatably connected to the outer shell, and the rotating tube is inserted between the upper partition and the lower partition. A transmission cavity is provided between the lower partition and the outer shell. The driving motor is fastened to the inner wall of the transmission cavity. A transmission gear is provided at the output end of the driving motor. A first gear ring is provided at one end of the rotating tube close to the driving motor, and the transmission gear is engaged with the first gear ring.

[0012] In order to improve the mixing degree of sodium bicarbonate powder and flue gas, a freely rotatable rotating tube is used to drive the flue gas to move, thereby promoting mixing and improving reaction efficiency. The drive motor is the main power source of the mixing assembly. When flue gas treatment is carried out, the drive motor is activated to drive the transmission gear to rotate, and then the power is transmitted to the rotating tube through the first ring gear, thereby driving the rotating tube to rotate in the outer shell, causing the flue gas flowing through the rotating tube to rotate to a certain extent, thereby promoting the mixing of the flue gas and sodium bicarbonate powder.

[0013] Furthermore, a first outlet and a first side port are provided at one end of the rotating tube close to the upper partition, and an adjusting component is sleeved on the rotating tube. The adjusting component is used to adjust the opening and closing of the first outlet and the first side port, thereby changing the flow direction of the smoke.

[0014] The flue gas flows into the rotating tube along the air inlet. When the sulfur dioxide content in the flue gas is low, the flue gas flows out along the first outlet; when the sulfur dioxide content in the flue gas is high, the flue gas flows out along the first side outlet, and then flows into the gas flow channel after passing through the guidance of the regulating component.

[0015] Furthermore, the adjustment assembly includes a rotating cover, an adjustment motor and an adjustment gear. The rotating cover is rotatably connected to the rotating tube. The rotating tube is also provided with a power cabin. The adjustment motor is fastened to the inner wall of the power cabin. The output end of the adjustment motor is transmission-connected to the adjustment gear. The rotating cover is provided with a second outlet, a second side port and a second gear ring. The second outlet is connected to the gas outlet, the second side port is connected to the gas flow channel, the adjustment gear is transmission-connected to the second gear ring, and the adjustment motor can automatically adjust the position of the rotating cover according to the sulfur dioxide content detected by the gas analyzer. When the sulfur dioxide content is low: the second outlet is connected to the first outlet; When the sulfur dioxide content is high: the second side port is connected to the first side port.

[0016] In the initial state, the first outlet and the second outlet are connected. When the sulfur dioxide content in the flue gas increases, the regulating motor starts, and the regulating gear cooperates with the second gear ring to drive the rotating cover to rotate on the rotating tube, so that the first side port and the second side port that were originally disconnected are connected, and the flue gas flows into the gas flow channel. Moreover, the higher the sulfur dioxide content is, the greater the angle of rotation of the rotating cover driven by the regulating motor is, the larger the overlapping area of ​​the first side port and the second side port is, the larger the flow cross section is, the greater the flue gas flow to the gas flow channel is, and the higher the reaction efficiency is, that is, the flue gas flow is automatically adjusted according to the sulfur dioxide content, thereby promoting the desulfurization efficiency; There are two flow states of flue gas in the desulfurization reactor. When the sulfur dioxide content is low, the flue gas flows along the air inlet, the first outlet, the second outlet to the air outlet in sequence. At this time, the flue gas flow distance is short; when the sulfur dioxide content is high, the flue gas flows along the air inlet, the first side outlet, the second side outlet, the gas flow channel, the guide hole to the air outlet in sequence. At this time, the flue gas flow distance is long, which can ensure that the sulfur dioxide in the flue gas is completely reacted. That is, the regulating component can automatically adjust the flow distance of the flue gas according to the sulfur dioxide content in the flue gas, thereby improving the cleanliness of the treated gas.

[0017] Furthermore, the baffle assembly includes a fixed plate, a push rod and a movable plate. The fixed plate is fastened to the upper partition plate, the push rod is installed in the inner cavity of the fixed plate, the output end of the push rod is transmission-connected to the movable plate, and the movable plate is slidingly connected to the inner cavity of the fixed plate.

[0018] The fixed plate is installed on the upper partition to provide support for the baffle assembly. When the gas analyzer detects a higher sulfur dioxide content, the push rod drives the movable plate to move downward along the inner cavity of the fixed plate. The relative length of the gas flow channel separated by the baffle assembly is extended, further extending the distance that the flue gas with a higher sulfur dioxide content flows in the gas flow channel, so that the sulfur dioxide can be completely reacted with the sodium bicarbonate powder.

[0019] Furthermore, a guide plate is provided at the inlet of the rotating tube, and blades are provided on the inner wall of the rotating tube, and the blades are used to stir the flue gas and the sodium bicarbonate powder.

[0020] There are several holes on the guide plate to remove large particles of impurities in the flue gas and make them fall into the dust collection box below. Several blades are arranged on the inner wall of the freely rotating rotating tube to stir the flue gas, thereby promoting the mixing of the flue gas and sodium bicarbonate powder.

[0021] Furthermore, the blades are arranged obliquely on the inner wall of the rotating tube, and the inclination direction of the blades is opposite to the rotation direction of the rotating tube.

[0022] The inclined blades generate stronger shear forces, increasing the turbulence of the flue gas and thus promoting mixing with the sodium bicarbonate powder.

[0023] Furthermore, the dust collector adopts a bag dust removal method to remove solid particles in the desulfurized gas.

[0024] Compared with the prior art, the present invention has the following beneficial effects: 1. The coordinated design of rotating tubes, inclined blades, and gas flow channels significantly improves the turbulent mixing efficiency of flue gas and sodium bicarbonate. Combined with a multi-layer flow channel structure that extends the residence time of flue gas, this ensures full reaction of sulfur dioxide and a stable desulfurization rate that meets standards. The guide plates and dust collection box pre-filter large particles of impurities, reducing the load on the dust collector and further optimizing the overall system efficiency.

[0025] 2. Based on real-time monitoring by a gas analyzer, the regulating and baffle components dynamically switch the flue gas flow path, intelligently extending the reaction time to high-concentration sulfur dioxide and avoiding energy waste. The multi-layer baffle and built-in gas flow channel design optimize space utilization without increasing equipment height, adapting to site constraints in complex working conditions and enhancing equipment deployment flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall process of the present invention; Figure 2 It is a partial cross-sectional view of the desulfurization reactor of the present invention; Figure 3 is a schematic diagram of a mixing assembly of the present invention; Figure 4 for Figure 3 A local enlarged view of point A; Figure 5 for Figure 3 A partial enlarged view of point B; Figure 6 A partial cross-sectional view of a rotary tube according to the present invention; Figure 7 for Figure 6 A partial enlarged view of point C; Figure 8 It is a schematic diagram of the structure of the rotating cover of the present invention; Figure 9 Schematic diagram of smoke flow of the present invention.

[0027] In the figure: 1, silo; 2, feeder; 3, powder feeding system; 4, desulfurization reactor; 5, dust collector; 41, housing; 411, air inlet; 412, air outlet; 413, gas flow channel; 414, transmission chamber; 42, upper partition; 421, flow guide hole; 43, lower partition; 44, mixing assembly; 441, rotating tube; 4411, first gear ring; 4412, first outlet; 4413, first side port; 4414, Power compartment; 442, drive motor; 443, transmission gear; 444, guide plate; 445, blade; 45, adjustment assembly; 451, rotating cover; 4511, second outlet; 4512, second side outlet; 4513, second ring gear; 452, adjustment motor; 453, adjustment gear; 46, baffle assembly; 461, fixed plate; 462, push rod; 463, movable plate; 47, dust collection box; 48, gas analyzer. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example: Figures 1-9 As shown, the present invention provides a technical solution for coke oven flue gas desulfurization equipment based on gas-solid separation. The flue gas desulfurization equipment includes a silo 1, a feeder 2, a powder feeding system 3, a desulfurization reactor 4 and a dust collector 5. The silo 1 is connected to the feeder 2, the inlet of the powder feeding system 3 is connected to the outlet of the feeder 2, and the outlet of the powder feeding system 3 is connected to the desulfurization reactor 4. The powder feeding system 3 is used to transport sodium bicarbonate into the desulfurization reactor 4 to desulfurize the flue gas. The outlet of the desulfurization reactor 4 is connected to the dust collector 5. The flue gas in the desulfurization reactor 4 reacts with sodium bicarbonate to generate desulfurization particles. The dust collector 5 is used to separate the desulfurization particles.

[0030] The silo 1 is used to store sodium bicarbonate powder. When desulfurizing the flue gas, the feeder 2 conveys the sodium bicarbonate powder to the powder feeding system 3. The powder feeding system 3 sprays the powder evenly into the desulfurization reactor 4 by pneumatic conveying, so that the powder is fully mixed with the flue gas containing sulfur dioxide. The sodium bicarbonate powder can react with sulfur dioxide under suitable conditions to remove sulfur dioxide from the flue gas. Finally, the dust collector 5 removes the solid reaction products in the purified flue gas to achieve gas-solid separation.

[0031] The desulfurization reactor 4 includes a shell 41 , which is provided with an air inlet 411 and an air outlet 412 . The air inlet 411 is externally connected to the coke oven flue gas outlet, the air inlet 411 is connected to the powder feeding system 3 , and the air outlet 412 is connected to the dust collector 5 .

[0032] The outer shell 41 is used to protect the components in the desulfurization reactor 4 and provide a channel for the flow of flue gas. The coke oven flue gas to be treated enters the desulfurization reactor 4 through the air inlet 411 for treatment. The powder feeding system 3 injects sodium bicarbonate powder into the air inlet 411 by pneumatic conveying, thereby mixing with the flue gas. The treated flue gas is transferred to the dust collector 5 through the air outlet 412.

[0033] An upper partition 42, a lower partition 43, a mixing assembly 44, an adjusting assembly 45 and a baffle assembly 46 are provided in the outer shell 41. A gas flow channel 413 is formed between the upper partition 42 and the lower partition 43. A plurality of guide holes 421 are provided on the upper partition 42, and the guide holes 421 are connected to the gas flow channel 413. The mixing assembly 44 is inserted between the upper partition 42 and the lower partition 43. The mixing assembly 44 is used to promote the mixing of flue gas and sodium bicarbonate powder. The adjusting assembly 45 is connected to the mixing assembly 44. The adjusting assembly 45 is used to adjust the flow state of the flue gas. A dust collecting box 47 is provided at the bottom of the outer shell 41, and a gas analyzer 48 is provided at the air inlet 411. The gas analyzer 48 is used to detect the sulfur dioxide content in the flue gas. The baffle assembly 46 is connected to the upper partition 42. The baffle assembly 46 can automatically adjust the flow distance of the flue gas in the gas flow channel 413 according to the sulfur dioxide content in the flue gas, thereby promoting the reaction of the flue gas and sodium bicarbonate.

[0034] The gas flow channel 413 formed between the upper partition 42 and the lower partition 43 can extend the flow distance of the flue gas in the desulfurization reactor 4, so that the sulfur dioxide in the flue gas can be completely reacted with sodium bicarbonate, so that the discharged gas meets the standard. The mixing component 44 is used to provide space for the mixing of the flue gas and sodium bicarbonate; when the gas analyzer 48 detects that the sulfur dioxide content in the flue gas fluctuates, the flow channel distance in the mixing component 44 is shorter, so that the sulfur dioxide cannot be completely reacted. The flue gas is guided to the gas flow channel 413 by the adjustment component 45, and the flow distance of the flue gas is extended, so that the sulfur dioxide in the flue gas is completely reacted. The baffle component 46 can automatically adjust the length of the gas flow channel 413 according to the sulfur dioxide content, so as to ensure complete reaction; the gas flow channel 413 can extend the flow distance of the flue gas without increasing the height of the desulfurization reactor 4, thereby improving the applicability of the equipment.

[0035] The mixing assembly 44 includes a rotating tube 441 and a driving motor 442. The rotating tube 441 is rotatably connected to the outer shell 41. The rotating tube 441 is inserted between the upper partition 42 and the lower partition 43. A transmission chamber 414 is provided between the lower partition 43 and the outer shell 41. The driving motor 442 is fastened to the inner wall of the transmission chamber 414. A transmission gear 443 is provided at the output end of the driving motor 442. A first gear ring 4411 is provided at one end of the rotating tube 441 close to the driving motor 442, and the transmission gear 443 is meshed with the first gear ring 4411.

[0036] In order to improve the mixing degree between the sodium bicarbonate powder and the flue gas, the flue gas is driven to move by a freely rotatable rotating tube 441, thereby promoting mixing and improving reaction efficiency. The driving motor 442 is the main power source of the mixing assembly 44. When the flue gas is treated, the driving motor 442 is activated to drive the transmission gear 443 to rotate, and then the power is transmitted to the rotating tube 441 through the first ring gear 4411, thereby driving the rotating tube 441 to rotate in the shell 41, so that the flue gas flowing through the rotating tube 441 rotates to a certain extent, thereby promoting the mixing of the flue gas and the sodium bicarbonate powder.

[0037] A first outlet 4412 and a first side outlet 4413 are provided at one end of the rotating tube 441 close to the upper partition 42. The adjustment component 45 is sleeved on the rotating tube 441. The adjustment component 45 is used to adjust the opening and closing of the first outlet 4412 and the first side outlet 4413, thereby changing the flow direction of the smoke.

[0038] The flue gas flows into the rotating tube 441 along the air inlet 411. When the sulfur dioxide content in the flue gas is low, the flue gas flows out along the first outlet 4412. When the sulfur dioxide content in the flue gas is high, the flue gas flows out along the first side outlet 4413, and then flows into the gas flow channel 413 after passing through the guidance of the regulating component 45.

[0039] The adjustment assembly 45 includes a rotating cover 451, an adjustment motor 452, and an adjustment gear 453. The rotating cover 451 is rotatably connected to the rotating tube 441. The rotating tube 441 is also provided with a power compartment 4414. The adjustment motor 452 is fastened to the inner wall of the power compartment 4414. The output end of the adjustment motor 452 is in driving connection with the adjustment gear 453. The rotating cover 451 is provided with a second outlet 4511, a second side outlet 4512, and a second ring gear 4513. The second outlet 4511 is in communication with the gas outlet 412, and the second side outlet 4512 is in communication with the gas flow channel 413. The adjustment gear 453 is in driving connection with the second ring gear 4513. The adjustment motor 452 can automatically adjust the position of the rotating cover 451 based on the sulfur dioxide content detected by the gas analyzer 48. When the sulfur dioxide content is low: the second outlet 4511 is connected to the first outlet 4412; When the sulfur dioxide content is high, the second side port 4512 is connected to the first side port 4413 .

[0040] In the initial state, the first outlet 4412 and the second outlet 4511 are connected. When the sulfur dioxide content in the flue gas increases, the regulating motor 452 is started, and the regulating gear 453 cooperates with the second gear ring 4513 to drive the rotating cover 451 to rotate on the rotating tube 441, so that the first side port 4413 and the second side port 4512, which were originally disconnected, are connected, and the flue gas flows into the gas flow channel 413. In addition, the higher the sulfur dioxide content, the greater the angle of rotation of the rotating cover 451 driven by the regulating motor 452, the larger the overlapping area of ​​the first side port 4413 and the second side port 4512, the larger the flow cross section, the greater the flue gas flow to the gas flow channel 413, and the higher the reaction efficiency. In other words, the flue gas flow is automatically adjusted according to the sulfur dioxide content, thereby improving the desulfurization efficiency. The flue gas has two flow states in the desulfurization reactor 4. When the sulfur dioxide content is low, the flue gas flows along the air inlet 411, the first outlet 4412, the second outlet 4511 to the air outlet 412 in sequence. At this time, the flue gas flow distance is shorter; when the sulfur dioxide content is high, the flue gas flows along the air inlet 411, the first side outlet 4413, the second side outlet 4512, the gas flow channel 413, and the guide hole 421 to the air outlet 412 in sequence. At this time, the flue gas flow distance is longer, which can ensure that the sulfur dioxide in the flue gas is completely reacted, that is, the adjustment component 45 can automatically adjust the flow distance of the flue gas according to the sulfur dioxide content in the flue gas, thereby improving the cleanliness of the treated gas.

[0041] The baffle assembly 46 includes a fixed plate 461, a push rod 462 and a movable plate 463. The fixed plate 461 is fastened to the upper partition 42, the push rod 462 is installed in the inner cavity of the fixed plate 461, the output end of the push rod 462 is transmission-connected to the movable plate 463, and the movable plate 463 is slidingly connected to the inner cavity of the fixed plate 461.

[0042] The fixed plate 461 is installed on the upper partition 42 to provide support for the baffle assembly 46. When the gas analyzer 48 detects a higher sulfur dioxide content, the push rod 462 drives the movable plate 463 to move downward along the inner cavity of the fixed plate 461. The relative length of the gas flow channel 413 separated by the baffle assembly 46 is extended, further extending the distance that the flue gas with a higher sulfur dioxide content flows in the gas flow channel 413, so that the sulfur dioxide can be completely reacted with the sodium bicarbonate powder.

[0043] A guide plate 444 is provided at the inlet of the rotating tube 441 , and blades 445 are provided on the inner wall of the rotating tube 441 . The blades 445 are used to stir the smoke and the sodium bicarbonate powder.

[0044] The guide plate 444 is provided with a plurality of holes to remove large particles of impurities in the flue gas and make them fall into the dust collecting box 47 below. A plurality of blades 445 are arranged on the inner wall of the freely rotatable rotating tube 441 to stir the flue gas through the blades 445, thereby promoting the mixing of the flue gas and the sodium bicarbonate powder.

[0045] The blades 445 are arranged obliquely on the inner wall of the rotating tube 441 , and the inclination direction of the blades 445 is opposite to the rotation direction of the rotating tube 441 .

[0046] The inclined blades 445 generate stronger shearing forces, increasing the turbulence of the flue gas, thereby promoting mixing with the sodium bicarbonate powder.

[0047] The dust collector 5 adopts a bag dust removal method to remove solid particles in the desulfurized gas.

[0048] The working principle of the present invention is as follows: when desulfurizing flue gas, the feeder 2 conveys the sodium bicarbonate powder to the powder feeding system 3. The powder feeding system 3 sprays the powder evenly into the desulfurization reactor 4 by pneumatic conveying, thereby fully mixing with the flue gas containing sulfur dioxide. The sodium bicarbonate powder reacts with the sulfur dioxide to remove the sulfur dioxide in the flue gas. The desulfurized particles generated by the reaction enter the dust collector 5 with the flue gas, and the gas-solid separation is achieved through filtration, and the clean gas meets the emission standards; after the flue gas enters the rotating tube 441, the driving motor 442 drives the rotating tube 441 to rotate, and the inclined blades 445 on the inner wall generate turbulence, which strongly stirs the flue gas and the desulfurizer. , significantly improving the mixing uniformity of flue gas and desulfurizer; the gas analyzer 48 monitors the sulfur dioxide concentration in the flue gas in real time, triggering the action of the regulating component 45; low concentration of sulfur dioxide: the flue gas flows out directly from the first outlet 4412 of the rotating tube 441, and quickly enters the dust collector 5 through a short path; high concentration of sulfur dioxide: the regulating motor 452 drives the rotating cover 451 to rotate, so that the flue gas is diverted to the gas flow channel 413, extending the flow distance, and ensuring that the sulfur dioxide is fully reacted; the baffle component 46 dynamically adjusts the position of the movable plate 463 through the push rod 462, further extending the length of the gas flow channel, adapting to the fluctuation of sulfur dioxide concentration, and ensuring the thoroughness of the reaction.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A coke oven flue gas desulfurization device based on gas-solid separation, characterized by: The flue gas desulfurization equipment comprises a silo (1), a feeder (2), a powder delivery system (3), a desulfurization reactor (4) and a dust collector (5). The silo (1) is connected to the feeder (2), the inlet of the powder delivery system (3) is connected to the outlet of the feeder (2), the outlet of the powder delivery system (3) is connected to the desulfurization reactor (4), the powder delivery system (3) is used to deliver sodium bicarbonate to the desulfurization reactor (4) to desulfurize the flue gas, the outlet of the desulfurization reactor (4) is connected to the dust collector (5), the flue gas in the desulfurization reactor (4) reacts with the sodium bicarbonate to generate desulfurized particles, and the dust collector (5) is used to separate the desulfurized particles.

2. The coke oven flue gas desulfurization equipment based on gas-solid separation according to claim 1, characterized in that: The desulfurization reactor (4) comprises a shell (41), and the shell (41) is provided with an air inlet (411) and an air outlet (412). The air inlet (411) is externally connected to the coke oven flue gas outlet, the air inlet (411) is in communication with the powder feeding system (3), and the air outlet (412) is in communication with the dust collector (5).

3. The coke oven flue gas desulfurization equipment based on gas-solid separation according to claim 2, characterized in that: An upper baffle (42), a lower baffle (43), a mixing assembly (44), a regulating assembly (45), and a baffle assembly (46) are provided in the housing (41). A gas flow channel (413) is formed between the upper baffle (42) and the lower baffle (43). The upper baffle (42) is provided with a plurality of guide holes (421), the guide holes (421) being in communication with the gas flow channel (413). The mixing assembly (44) is inserted between the upper baffle (42) and the lower baffle (43). The mixing assembly (44) is used to promote mixing of flue gas and sodium bicarbonate powder. The regulating assembly (45) is used to promote mixing of flue gas and sodium bicarbonate powder. The component (45) is connected to the mixing component (44), the regulating component (45) is used to regulate the flow state of the flue gas, a dust collecting box (47) is provided below the housing (41), a gas analyzer (48) is provided at the air inlet (411), and the gas analyzer (48) is used to detect the sulfur dioxide content in the flue gas, the baffle component (46) is connected to the upper partition (42), and the baffle component (46) can automatically regulate the flow distance of the flue gas in the gas flow channel (413) according to the sulfur dioxide content in the flue gas, thereby promoting the reaction between the flue gas and sodium bicarbonate.

4. The coke oven flue gas desulfurization equipment based on gas-solid separation according to claim 3, characterized in that: The mixing assembly (44) comprises a rotating tube (441) and a driving motor (442). The rotating tube (441) is rotatably connected to the outer shell (41). The rotating tube (441) is inserted between the upper partition (42) and the lower partition (43). A transmission cavity (414) is provided between the lower partition (43) and the outer shell (41). The driving motor (442) is tightly connected to the inner wall of the transmission cavity (414). A transmission gear (443) is provided at the output end of the driving motor (442). A first gear ring (4411) is provided at one end of the rotating tube (441) close to the driving motor (442). The transmission gear (443) meshes with the first gear ring (4411).

5. The coke oven flue gas desulfurization equipment based on gas-solid separation according to claim 4, characterized in that: The rotating tube (441) is provided with a first outlet (4412) and a first side outlet (4413) at one end thereof close to the upper partition plate (42). The regulating assembly (45) is sleeved on the rotating tube (441). The regulating assembly (45) is used to regulate the opening and closing of the first outlet (4412) and the first side outlet (4413), thereby changing the flow direction of the smoke.

6. The coke oven flue gas desulfurization equipment based on gas-solid separation according to claim 5, characterized in that: The regulating assembly (45) comprises a rotating cover (451), an regulating motor (452) and an regulating gear (453); the rotating cover (451) is rotatably connected to the rotating tube (441); a power cabin (4414) is further provided on the rotating tube (441); the regulating motor (452) is fastened to the inner wall of the power cabin (4414); the output end of the regulating motor (452) is transmission-connected to the regulating gear (453); the rotating cover (451) is provided with a second outlet (4511), a second side outlet (4512) and a second ring gear (4513); the second outlet (4511) is in communication with the gas outlet (412); the second side outlet (4512) is in communication with the gas flow channel (413); the regulating gear (453) is transmission-connected to the second ring gear (4513); the regulating motor (452) can automatically adjust the position of the rotating cover (451) according to the sulfur dioxide content detected by the gas analyzer (48); When the sulfur dioxide content is low: the second outlet (4511) is connected to the first outlet (4412); When the sulfur dioxide content is high: the second side port (4512) is connected to the first side port (4413).

7. The coke oven flue gas desulfurization equipment based on gas-solid separation according to claim 6, characterized in that: The baffle assembly (46) includes a fixed plate (461), a push rod (462) and a movable plate (463), wherein the fixed plate (461) is fastened to the upper partition plate (42), the push rod (462) is installed in the inner cavity of the fixed plate (461), the output end of the push rod (462) is transmission-connected to the movable plate (463), and the movable plate (463) is slidably connected to the inner cavity of the fixed plate (461).

8. The coke oven flue gas desulfurization equipment based on gas-solid separation according to claim 4, characterized in that: A guide plate (444) is provided at the inlet of the rotating tube (441), and blades (445) are provided on the inner wall of the rotating tube (441). The blades (445) are used to stir the smoke and sodium bicarbonate powder.

9. The coke oven flue gas desulfurization equipment based on gas-solid separation according to claim 8, characterized in that: The blades (445) are arranged obliquely on the inner wall of the rotating tube (441), and the inclination direction of the blades (445) is opposite to the rotation direction of the rotating tube (441).

10. The coke oven flue gas desulfurization equipment based on gas-solid separation according to claim 1, characterized in that: The dust collector (5) adopts a bag dust removal method to remove solid particles in the desulfurized gas.

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