A desulfurization and denitration equipment for flue dust coal gas treatment

Abstract

The present application belongs to the technical field of flue dust coal gas treatment, and particularly relates to a desulfurization and denitrification equipment for flue dust coal gas treatment, which comprises a desulfurization tower, a pipeline, a heat exchange device and a denitrification tower, a desulfurization device is arranged in the desulfurization tower, the desulfurization device comprises a cylinder, a spiral groove is arranged in the cylinder, the spiral groove is provided with multiple groups and is distributed in a circle, a spray pipe is fixed to the inner wall of the desulfurization tower through a fixing piece, the desulfurization and denitrification equipment for flue dust coal gas treatment is provided with a cover body and a shunt pipe connected to the lower end of the smoke inlet pipe, flue dust coal gas is discharged into the spray liquid through the gas outlet hole, the discharge area is expanded, the flue dust coal gas is fully contacted with the spray liquid, and the initial reaction efficiency is improved; a motor drives the stirring blade to rotate, the spray liquid is stirred, the deposition is prevented, and the reaction efficiency is further improved; the flue dust coal gas is increased in the residence time in the spiral groove of the cylinder, and the flue dust coal gas is reacted with the spray liquid sprayed by the spray pipes at different positions for multiple times, the desulfurization treatment effect is greatly improved, and the sulfur content in the flue dust coal gas is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, specifically to a desulfurization and denitrification device for flue gas treatment. Background Technology

[0002] Desulfurization and denitrification equipment for flue gas treatment is an environmental protection device used to remove sulfur dioxide (SO2) and nitrogen oxides (NOx) from industrial flue gas. It reduces pollutant emissions through physical or chemical methods, preventing environmental problems such as acid rain and photochemical smog, and is widely used in industries such as power, steel, and chemicals.

[0003] Currently, most existing equipment is not well-designed for desulfurization processes, typically only achieving one or two desulfurization reactions. The short contact time between flue gas and the desulfurization medium results in incomplete reactions, failing to effectively reduce the sulfur content in the flue gas and making it difficult to meet increasingly stringent environmental emission standards. Furthermore, existing equipment lacks effective dispersion and guidance structures when the flue gas enters the desulfurization zone, leading to concentrated emissions, a small contact area with the desulfurization liquid, and low initial reaction efficiency. Therefore, we propose a desulfurization and denitrification device for flue gas treatment. Summary of the Invention

[0004] The main objective of this invention is to provide a desulfurization and denitrification device for treating flue gas and dust, which can solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention proposes a desulfurization and denitrification equipment for flue gas treatment, comprising a desulfurization tower, pipelines, a heat exchange device, and a denitrification tower. The desulfurization tower is equipped with a desulfurization device, which includes: The cylinder has spiral grooves inside, and the spiral grooves are provided in multiple sets and distributed in a circular pattern. The spray pipe is fixed to the inner wall of the desulfurization tower by a fixing component. There are three sets of spray pipes, one set is set below the cylinder and the other two sets are set above the cylinder. The water inlet of the spray pipe is connected to the liquid inlet pipe. The end of the liquid inlet pipe is connected to the output end of the power pump, and the input end of the power pump is connected to the storage tank through the pipe body.

[0006] Preferably, the outer wall of the desulfurization tower is provided with a flue gas inlet pipe, the end of the flue gas inlet pipe is connected to a cover, the lower end of the cover is connected to a diversion pipe, and the diversion pipe is provided with an air outlet.

[0007] Preferably, a conical sleeve is provided below the diversion pipe, and a drain pipe is connected to the bottom of the conical sleeve. The end of the drain pipe is connected to the upper end of the filter box.

[0008] Preferably, the filter box has a cover, and the inner wall of the filter box has a slot. An insert plate is inserted into the slot. The insert plate has three groups: a, b, and c. The insert plate in group a has a filter screen, and the insert plates in groups b and c have gauze.

[0009] Preferably, the filter screen is penetrated by the shaft and rotatably connected to the shaft, the shaft has a transverse groove, and the transverse groove is fitted with a sleeve.

[0010] Preferably, the outer wall of the socket is connected to a fixing rod, the fixing rod is slidably connected to a moving plate, the outer wall of the moving plate is provided with a scraper, and the fixing rod is provided with a locking element.

[0011] Preferably, the outer wall of the filter box is provided with a reduction gearbox, the input end of the reduction gearbox is connected to the output end of the motor, and the output end of the reduction gearbox is connected to a rotating shaft.

[0012] Preferably, a limiting groove is formed on the outer wall of the rotating shaft, a rod is slidably connected to the rotating shaft, a sleeve is connected to the end of the rod, a spring is connected to the outer wall of the rod, and the end of the spring away from the rod is connected to the inner wall of the rotating shaft.

[0013] Preferably, the inner wall of one side of the sleeve is provided with a protruding rod, which cooperates with the transverse groove, and the inner wall of the other side is provided with a protrusion, which cooperates with the limiting groove.

[0014] Preferably, a motor is provided on the outer wall of the desulfurization tower, and a rotating rod is connected to the output end of the motor. The rotating rod passes through the stirring blade and is fixedly connected to the stirring blade.

[0015] This invention provides a desulfurization and denitrification device for flue gas treatment. It has the following beneficial effects: (1) The desulfurization and denitrification equipment for treating flue gas has a hood and a diversion pipe at the lower end of the flue gas inlet pipe, so that the flue gas is discharged into the spray liquid through the gas outlet, which expands the discharge area and makes full contact with the spray liquid, thereby improving the initial reaction efficiency. The motor drives the stirring blade to rotate, stirring the spray liquid, preventing sedimentation and further improving the reaction efficiency. The flue gas has a longer residence time in the spiral groove of the cylinder, and reacts with the spray liquid sprayed by the spray pipe at different positions multiple times, which greatly improves the desulfurization effect and effectively reduces the sulfur content in the flue gas.

[0016] (2) The desulfurization and denitrification equipment for flue gas treatment has a filter box at the bottom of the desulfurization tower. The spray liquid passes through a double filter screen and two layers of gauze in sequence, effectively intercepting solid impurities and reaction precipitates, preventing impurities from entering the spray pipe and causing pipe blockage, and ensuring the continuous and stable operation of the spray system. At the same time, through the transmission of components such as motor, gearbox, and rotating shaft, the scraper moves in a circular motion on the outer wall of the filter screen to scrape off the suspended matter attached to the surface of the filter screen, preventing the filter screen from clogging. The fit between the scraper and the outer wall of the filter screen can be adjusted by the locking device to ensure the cleaning effect.

[0017] (3) The desulfurization and denitrification equipment for flue gas treatment adopts a plug-in design for the filter box, which allows for quick disassembly and replacement of the filter screen and gauze, facilitating daily maintenance. When the scraper needs to be replaced, the sleeve is pulled and rotated to slide along the limiting groove and temporarily limit it, thereby disengaging it from the shaft. Then, the plug sleeve can be pulled out to remove the fixing rod and scraper for replacement. After replacement, the sleeve can be easily reset and fixed. The entire replacement process is simple and easy to operate, greatly saving maintenance time and costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the desulfurization tower of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the cylindrical body of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the cover and the diversion pipe of the present invention; Figure 5 This is a schematic diagram of the filter box structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the filter box of the present invention; Figure 7 This is a schematic diagram of a portion of the three-dimensional structure of the present invention; Figure 8 This is a schematic diagram of the three-dimensional cross-sectional structure of the fixing rod of the present invention; Figure 9 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotating shaft of the present invention.

[0020] Explanation of icon numbers: 1. Desulfurization tower; 10. Flue gas inlet pipe; 101. Cover; 102. Diversion pipe; 103. Gas outlet; 11. Motor 1; 111. Rotating rod; 112. Stirring blade; 12. Conical sleeve; 121. Drainage pipe; 2. Pipeline; 3. Heat exchanger; 4. Denitrification tower; 5. Desulfurization device; 51. Cylinder; 511. Spiral groove; 52. Spray pipe; 521. Fixture; 53. Liquid inlet pipe; 54. Storage tank; 6. Filter box; 61. Cover; 62. Slot; 63. Insert plate; 631. Filter screen; 632. Shaft; 633. Horizontal groove; 634. Insert sleeve; 635. Fixing rod; 636. Moving plate; 637. Scraper; 638. Locking component; 64. Motor II; 65. Gearbox; 651. Rotating shaft; 652. Limiting groove; 653. Sleeve; 654. Rod; 655. Spring; 656. Protruding rod; 657. Protrusion; 66. Gauze.

[0021] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments.

[0023] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate for the embodiments of this application described herein.

[0025] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0027] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0028] It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0029] Please see Figures 1-9 The present invention proposes a desulfurization and denitrification equipment for flue gas treatment, including a desulfurization tower 1, a pipeline 2, a heat exchange device 3 and a denitrification tower 4. The outer wall of the desulfurization tower 1 is equipped with a motor 11, and the output end of the motor 11 is connected to a rotating rod 111. The rotating rod 111 passes through the stirring blade 112 and is fixedly connected to the stirring blade 112. The desulfurization tower 1 is equipped with a desulfurization device 5.

[0030] In an embodiment of the present invention, in order to desulfurize flue gas, the desulfurization device 5 specifically includes a cylinder 51, a spiral groove 511 is provided inside the cylinder 51, the spiral groove 511 is provided in multiple sets and is distributed in a circular pattern, the spray pipe 52 is fixed to the inner wall of the desulfurization tower 1 by a fixing member 521, the spray pipe 52 is provided in three sets, one set is provided below the cylinder 51 and the other two sets are provided above the cylinder 51, the water inlet of the spray pipe 52 is connected to the liquid inlet pipe 53, the end of the liquid inlet pipe 53 is connected to the output end of the power pump, and the input end of the power pump is connected to the storage tank 54 through the pipe body, the outer wall of the desulfurization tower 1 is provided with a flue gas inlet pipe 10, the end of the flue gas inlet pipe 10 is connected to the cover 101, the lower end of the cover 101 is connected to the diversion pipe 102, and the diversion pipe 102 is provided with an air outlet 103. Furthermore, to prevent the spray pipe 52 from becoming clogged, a conical sleeve 12 is provided below the diversion pipe 102. The bottom of the conical sleeve 12 is connected to a drain pipe 121. The end of the drain pipe 121 is connected to the upper end of the filter box 6. The filter box 6 is provided with a cover 61. The inner wall of the filter box 6 is provided with a slot 62. A plate 63 is inserted into the slot 62. There are three sets of plates 63: a, b, and c. The plate 63 in set a is provided with a filter screen 631, and the plates 63 in sets b and c are provided with gauze 66. Furthermore, to prevent the filter screen 631 from becoming clogged, specifically, the filter screen 631 is penetrated by the shaft body 632 and rotatably connected to the shaft body 632. The shaft body 632 has a transverse groove 633, which is fitted with a sleeve 634. A fixing rod 635 is connected to the outer wall of the sleeve 634. A moving plate 636 is slidably connected to the fixing rod 635. A scraper 637 is provided on the outer wall of the moving plate 636. A locking element 638 is provided on the fixing rod 635. A reduction gearbox 65 is provided on the outer wall of the filter box 6. The input end of the reduction gearbox 65 is connected to the output end of the motor 64. The output end of the reduction gearbox 65 is connected to a rotating shaft 651. Furthermore, a limiting groove 652 is provided on the outer wall of the rotating shaft 651, and a rod 654 is slidably connected to the rotating shaft 651. A sleeve 653 is connected to the end of the rod 654, and a spring 655 is connected to the outer wall of the rod 654. The end of the spring 655 away from the rod 654 is connected to the inner wall of the rotating shaft 651. A protruding rod 656 is provided on one side of the inner wall of the sleeve 653, and the protruding rod 656 cooperates with the transverse groove 633. A protrusion 657 is provided on the other side of the inner wall, and the protrusion 657 cooperates with the limiting groove 652. In this invention, during use, the inlet pipe 10 is first opened to allow the flue gas to enter the desulfurization tower 1. It should be noted that the inlet pipe 10 is located below the surface of the spray liquid in the desulfurization tower 1, and its lower end is connected to the hood 101. A multi-section diversion pipe 102 is located below the hood 101. The flue gas enters the diversion pipe 102 through the hood 101 and is then discharged into the spray liquid through the outlet 103. The design of the diversion pipe 102 expands the discharge area of ​​the flue gas, allowing it to fully contact the spray liquid and improving the initial reaction efficiency.

[0031] Next, motor 11 is started. Motor 11 drives rotating rod 111 to rotate stirring blade 112, agitating the spray liquid inside the tower. This prevents the spray liquid from settling and further improves the reaction efficiency with the flue gas. The flue gas after preliminary filtration will drift upwards in the tower. At this time, the power pump is started, and the spray liquid in storage tank 54 is sprayed through spray pipe 52 to perform the first round of desulfurization treatment on the flue gas.

[0032] Subsequently, the flue gas moves downwards to the bottom of cylinder 51 and enters the spiral groove 511 of cylinder 51 through the air inlet. The spiral groove 511 increases the residence time of the flue gas. At the same time, the spray liquid sprayed from the spray pipe 52 above cylinder 51 flows into the spiral groove 511 from the air outlet above cylinder 51, reacting with the flue gas again. After the flue gas is discharged upwards through the outlet of the spiral groove 511, it will react a third time with the spray liquid sprayed from the uppermost spray pipe 52 of desulfurization tower 1, significantly improving the desulfurization effect. Finally, the flue gas after three desulfurization treatments enters the heat exchange device 3 through pipeline 2, and is then transported to the denitrification tower 4 for further treatment. The spray liquid collected at the bottom of the desulfurization tower 1 will flow into the filter box 6 through the drain pipe 121. The spray liquid will be filtered by the filter screen 631 and two layers of gauze 66 in the filter box 6 to effectively intercept solid impurities and reaction precipitates. This dual filtration design can prevent impurities from entering the spray pipe 52, prevent the spray pipe 52 from being blocked, and ensure the continuous and stable operation of the spray system. Starting motor 64, power is transmitted via reduction gearbox 65 to rotating shaft 651, causing rotating shaft 651 to rotate. Figure 7 As shown. Because the protruding rod 656 on the inner wall of the sleeve 653 is inserted into the transverse groove 633 of the shaft 632, the rotating shaft 651 will drive the shaft 632 to rotate synchronously; when the shaft 632 rotates, the sleeve 634 that cooperates with it will drive the fixed rod 635 to rotate together, and the moving plate 636 that is slidably connected to the fixed rod 635 will drive the scraper 637 to make a circular motion on the outer wall of the filter screen 631, thereby scraping off the suspended matter attached to the surface of the filter screen and preventing the filter screen 631 from clogging.

[0033] It should be noted that the locking element 638 passes through the fixing rod 635 and is threadedly connected to it. When the locking element 638 is rotated, its end will press against the moving plate 636, causing the moving plate 636 to slide within the fixing rod 635. This adjusts the fit between the scraper 637 and the outer wall of the filter screen 631, ensuring a good cleaning effect. Furthermore, the filter box 6 adopts a plug-in design with a plate 63, allowing for quick disassembly and replacement of the filter screen 631 and gauze 66, facilitating daily maintenance. When the scraper 637 needs to be replaced, first pull the sleeve 653 so that it slides along the L-shaped limiting groove 652. At this time, the spring 655 connecting the sleeve 653 is stretched and undergoes elastic deformation. When the sleeve 653 slides to the bottom of the limiting groove 652, rotate the sleeve 653 so that it is stuck in the transverse section of the L-shaped groove, thereby temporarily limiting the sleeve 653. At this time, the sleeve 653 is disengaged from the shaft 632.

[0034] Then, pull the sleeve 634 out of the shaft 632, and the fixing rod 635 and scraper 637 can be removed and replaced. After replacement, first reinsert the sleeve 634 into the shaft 632, then align the sleeve 653 with the corresponding position of the shaft 632, rotate the sleeve 653 in the opposite direction to disengage it from the lateral limiting section of the L-shaped groove, and the sleeve 653 will return to its original position along the limiting groove 652 under the elastic force of the spring 655, slide into the mating position of the shaft 632 and abut against the end of the sleeve 634 to complete the fixation.

[0035] All electrical components appearing in this application are electrically connected to the controller and 220V AC mains power. The controller is a conventional and known device. All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding that are mature in the prior art. In addition, the standard parts are all conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art.

[0036] It should be noted that the above electrical components are all existing technology products. Those skilled in the art should select, install, and complete the circuit debugging work according to the needs of use to ensure that each electrical appliance can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here. The supporting structures of the hydraulic drive structure appearing in this application document, such as hydraulic tanks and hydraulic pumps, are existing equipment and will not be described in detail here.

[0037] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A desulfurization and denitrification device for flue gas treatment, comprising a desulfurization tower (1), a pipeline (2), a heat exchange device (3), and a denitrification tower (4), wherein the desulfurization tower (1) is equipped with a desulfurization device (5), characterized in that: The desulfurization device (5) includes: The cylindrical body (51) has a spiral groove (511) inside, and the spiral groove (511) has multiple sets and is distributed in a circular pattern; Spray pipe (52), the spray pipe (52) is fixed to the inner wall of the desulfurization tower (1) by a fastener (521). There are three sets of spray pipe (52), one set is set below the cylinder (51), and the other two sets are set above the cylinder (51). The inlet of the spray pipe (52) is connected to the liquid inlet pipe (53). The end of the liquid inlet pipe (53) is connected to the output end of the power pump, and the input end of the power pump is connected to the storage tank (54) through the pipe body.

2. The desulfurization and denitrification equipment for flue gas treatment according to claim 1, characterized in that: The desulfurization tower (1) has an inlet pipe (10) on its outer wall. The end of the inlet pipe (10) is connected to a cover (101). The lower end of the cover (101) is connected to a diversion pipe (102), and an outlet hole (103) is opened on the diversion pipe (102).

3. The desulfurization and denitrification equipment for flue gas treatment according to claim 2, characterized in that: A conical sleeve (12) is provided below the diversion pipe (102), and a drain pipe (121) is connected to the bottom of the conical sleeve (12). The end of the drain pipe (121) is connected to the upper end of the filter box (6).

4. The desulfurization and denitrification equipment for flue gas treatment according to claim 3, characterized in that: The filter box (6) is provided with a cover (61), and the inner wall of the filter box (6) is provided with a slot (62). The slot (62) is connected to a plate (63). The plate (63) is provided with three groups: a, b, and c. The plate (63) in group a is provided with a filter screen (631), and the plates (63) in groups b and c are provided with gauze (66).

5. The desulfurization and denitrification equipment for flue gas treatment according to claim 4, characterized in that: The filter screen (631) is penetrated by the shaft (632) and rotatably connected to the shaft (632). The shaft (632) has a transverse groove (633), and the transverse groove (633) is fitted with a sleeve (634).

6. The desulfurization and denitrification equipment for flue gas treatment according to claim 5, characterized in that: The outer wall of the sleeve (634) is connected to a fixing rod (635), the fixing rod (635) is slidably connected to a moving plate (636), the outer wall of the moving plate (636) is provided with a scraper (637), and the fixing rod (635) is provided with a locking element (638).

7. The desulfurization and denitrification equipment for flue gas treatment according to claim 6, characterized in that: The filter box (6) is provided with a speed reduction box (65) on its outer wall. The input end of the speed reduction box (65) is connected to the output end of the motor (64), and the output end of the speed reduction box (65) is connected to a rotating shaft (651).

8. The desulfurization and denitrification equipment for flue gas treatment according to claim 7, characterized in that: The outer wall of the rotating shaft (651) has a limiting groove (652), and the rotating shaft (651) is slidably connected to a rod (654). The end of the rod (654) is connected to a sleeve (653), and the outer wall of the rod (654) is connected to a spring (655). The end of the spring (655) away from the rod (654) is connected to the inner wall of the rotating shaft (651).

9. A desulfurization and denitrification device for flue gas treatment according to claim 8, characterized in that: The sleeve (653) has a protruding rod (656) on one side of its inner wall, which cooperates with the transverse groove (633). The sleeve (653) has a protruding block (657) on the other side of its inner wall, which cooperates with the limiting groove (652).

10. A desulfurization and denitrification device for flue gas treatment according to claim 1, characterized in that: The desulfurization tower (1) is equipped with a motor (11) on its outer wall. The output end of the motor (11) is connected to a rotating rod (111). The rotating rod (111) passes through the stirring blade (112) and is fixedly connected to the stirring blade (112).

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