A semi-dry desulfurization tower that reduces wall adhesion and tower body wear

Abstract

This invention discloses a semi-dry desulfurization tower that reduces wall adhesion and tower body wear, comprising a desulfurization tower body; a cylinder disposed within the desulfurization tower with both ends connected to the desulfurization tower body, wherein a threaded groove is formed on the inner wall of the cylinder, the threaded groove surrounds the central axis of the cylinder, and the area enclosed by the inner wall of the cylinder forms an air duct along the direction of the central axis; and a nozzle disposed within the threaded groove. The semi-dry desulfurization tower of this invention, by setting the spiral groove, allows flue gas to form a rotating airflow when passing through the interior, thereby reducing the direct impact of airflow and pipe wall caused by internal wind pressure. Simultaneously, a nozzle structure is also provided on the surface of the spiral groove, ensuring that the entire inner wall remains in a flowing state, thereby reducing agglomerates adhering to the inner wall.

Description

Technical Field

[0001] This invention relates to the field of desulfurization equipment technology, and in particular to a semi-dry desulfurization tower that reduces wall adhesion and tower body wear. Background Technology

[0002] A desulfurization tower is a tower-type equipment used to desulfurize industrial waste gas. By formulating different dust removal agents, it can achieve the effects of dust removal and desulfurization at the same time, and chemically absorb SO2 in flue gas. The desulfurization towers commonly used in coal-fired power plants at home and abroad mainly include four types: spray empty tower, packed tower, double loop tower and jet drum tower.

[0003] Existing spray towers often have a relatively humid interior after the desulfurizing agent is sprayed out, which can easily cause dust to adhere to the inner wall of the tower. This is especially true when using Venturi tubes to form a circulating air duct. Due to the need for rapid air pressure, the particles in the dust can also cause damage to the inner wall of the desulfurization tower. In particular, since desulfurization towers are usually large frame systems, any weak or exposed areas can easily lead to damage to the desulfurization tower, thus limiting their practicality. Summary of the Invention

[0004] Based on the above-mentioned technical defects, the present invention provides a semi-dry desulfurization tower that reduces wall adhesion and tower body wear, solving the problems such as the adhesion of flue dust on the inner side of the tower wall in the prior art.

[0005] The present invention provides a semi-dry desulfurization tower that reduces wall adhesion and tower body wear, comprising a desulfurization tower body; a cylinder disposed inside the desulfurization tower and connected at both ends to the desulfurization tower body, wherein a threaded groove is formed on the inner wall of the cylinder, the threaded groove surrounds the central axis of the cylinder, and an air duct is formed in the area enclosed by the inner wall of the cylinder along the direction of the central axis; and a nozzle disposed in the threaded groove.

[0006] In one embodiment of the present invention, along the central axis of the cylinder, the cylinder is divided into a first connecting part located in the middle and a second connecting part connected to the upper and lower sides of the first connecting part, wherein the inner wall of the first connecting part is parallel to the central axis of the cylinder; from the first connecting part to the direction away from the first connecting part, the diameter of the second connecting part increases or decreases sequentially.

[0007] In one embodiment of the present invention, the semi-dry desulfurization tower for reducing wall adhesion and tower body wear further includes a desulfurizing agent pipe, and a liquid storage space is formed between the cylinder and the main body of the desulfurization tower. The desulfurizing agent pipe is installed on the main body of the desulfurization tower and communicates with the liquid storage space.

[0008] In one embodiment of the present invention, the semi-dry desulfurization tower for reducing wall adhesion and tower body wear further includes a fixing block located in the liquid storage space for fixing the main body and cylinder of the desulfurization tower.

[0009] In one embodiment of the present invention, the semi-dry desulfurization tower for reducing wall adhesion and tower body wear further includes a pressure sensor located on the surface of the fixed block and between the fixed block and the cylinder; and a main control system, which includes an MCU microcontroller unit connected to the pressure sensor.

[0010] In one embodiment of the present invention, the cylinder includes a fixing ring, which is circumferentially fixedly connected to the inner wall of the desulfurization tower body; and a cylinder body, which is slidably connected to the fixing ring, the cylinder body facing the desulfurization tower body on one side, and the cylinder body is provided with a toothed ring; the semi-dry desulfurization tower further includes a transmission gear, which is installed on the desulfurization tower body and meshes with the toothed ring; and a drive motor, the transmission gear being installed on the drive motor.

[0011] In one embodiment of the present invention, the rotation direction of the main body of the cylinder is opposite to the helical direction of the threaded groove.

[0012] In one embodiment of the present invention, the nozzle includes a base mounted on the threaded groove; a nozzle body, one end of which is connected to the base and the other end of which extends away from the base and forms a bend; and a mist spray and a liquid spray mounted on the nozzle body, the mist spray being directed toward the center of the desulfurization tower and the liquid spray being directed toward the threaded groove and positioned upwards.

[0013] In one embodiment of the present invention, the semi-dry desulfurization tower for reducing wall adhesion and tower body wear further includes a dust collector; an exhaust port is provided at the top of the desulfurization tower body, the exhaust port is connected to the dust collector, the bottom of the desulfurization tower body is connected to the dust collector through a Venturi pipe, and an air outlet is provided on the top of the dust collector away from the exhaust port of the desulfurization tower body.

[0014] In one embodiment of the present invention, a dust inlet is installed at the bottom of the desulfurization tower body, and a heating ring is provided at the dust inlet.

[0015] Beneficial effects:

[0016] 1. The semi-dry desulfurization tower of the present invention, which reduces wall adhesion and tower body wear, incorporates spiral grooves. When flue gas passes through the interior, it forms a rotating airflow, thereby reducing the direct impact of airflow on the pipe wall caused by wind pressure. Simultaneously, a nozzle structure is provided on the surface of the spiral grooves, ensuring that the entire inner wall remains in a flowing state, thus reducing agglomerates adhering to the inner wall. Furthermore, the cylinder is divided into sections along its central axis, forming a design where the diameter of the second connection section increases or decreases sequentially from the first connection section away from it. This design creates a shuttle-shaped airflow channel, which improves wind speed and direction. Combined with the spiral grooves, this further reduces the likelihood of flue gas adhering to the inner wall of the desulfurization tower.

[0017] 2: The semi-dry desulfurization tower of the present invention reduces wall adhesion and tower body wear by setting the cylinder body into a rotatable structure. When the cylinder body rotates against the wind direction, since it is opposite to the direction of the rotating groove, it can further increase the impact force on the cylinder wall, thereby removing the agglomerates located on the cylinder wall. Attached Figure Description

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of a semi-dry desulfurization tower for reducing wall adhesion and tower wear according to Embodiment 1 of the present invention.

[0020] Figure 2 This is a schematic diagram of the nozzle installation structure in Embodiment 1 of the present invention.

[0021] Figure 3 This is a schematic diagram of the nozzle structure in Embodiment 1 of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of a semi-dry desulfurization tower for reducing wall adhesion and tower wear according to Embodiment 2 of the present invention, mainly showing the cylindrical structure.

[0023] Figure 5 This is a cross-sectional view of the cylindrical structure of Embodiment 3 of the present invention.

[0024] The components include: 1. Desulfurization tower body; 2. Dust collector; 31. Venturi pipe; 32. Desulfurizing agent pipe; 4a, 4b, 4c. Cylinder body; 5. Heating ring; 6. Nozzle; 7. Pressure sensor; 8. Transmission gear; 9. Fixing block; 11. Exhaust port; 12. Dust inlet; 21. Air outlet; 41. Central shaft of cylinder body; 42. Threaded groove; 40b, 40c. Cylinder body body; 401a, 401b, 401c. First connecting part; 402a, 402b, 401c. Second connecting part; 403b. Hollow part; 43b, 43c. Gear ring; 44b, 44c. Fixing ring; 404. Air duct; 6. Base; 61. Nozzle body; 62. Mist spray; 63. Liquid spray; Liquid storage space 100. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. It should be noted that if any directional indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of this invention, such directional indication is only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0028] Example 1

[0029] like Figure 1 As shown, the present invention provides a semi-dry desulfurization tower that reduces wall adhesion and tower body wear, including a desulfurization tower body 1, a dust collector 2, a Venturi pipe 31, a heating ring 5, a nozzle 6, a pressure sensor 7, a transmission gear 8, a drive motor, and a main control system.

[0030] The top of the desulfurization tower body 1 is provided with an exhaust port 11, which is connected to the dust collector 2. The bottom of the desulfurization tower body 1 and the dust collector 2 are connected through a Venturi pipe 31. An outlet 21 is provided on the top of the dust collector 2 away from the exhaust port 11 of the desulfurization tower body 1. A dust inlet 12 is installed at the bottom of the desulfurization tower body 1. The dust inlet 12 is provided with a heating ring 5. The heating ring 5 is arranged in a ring shape and contains a heating module. The heating module is either a PTC heater or a resistance heating structure. The dust inlet 12 is arranged in an L-shape.

[0031] The cylinder 41a is disposed inside the desulfurization tower and its two ends are directly fixedly connected to the desulfurization tower body 1. A threaded groove 42 is formed on the inner wall of the cylinder 41a. The threaded groove 42 surrounds the central axis 41 of the cylinder. The area enclosed by the inner wall of the cylinder 41a forms an air duct 404 along the direction of the central axis.

[0032] Along the central axis 41 of the cylinder, the cylinder 41a is divided into a first connecting part 401a located in the middle and a second connecting part 401a connected to the upper and lower sides of the first connecting part 401a. The inner wall of the first connecting part 401a is parallel to the central axis 41 of the cylinder. From the first connecting part 401a away from the first connecting part 401a, the diameter of the second connecting part 401a decreases sequentially. The second connecting part 401a is inclined relative to the central axis 41 of the cylinder. The surfaces of the first connecting part 401a and / or the second connecting part 401a are both facing the middle of the desulfurization tower body 1. The first connecting part 401a is vertically arranged, that is, the side of the first connecting part 401a facing the central axis 41 of the cylinder is parallel to the central axis 41 of the cylinder.

[0033] like Figure 2 As shown, the nozzle 6 is disposed within the threaded groove 42. Figure 3 As shown, the nozzle 6 includes a base 60, a nozzle body 61, a mist spray 62, and a liquid spray 63. The base 60 is mounted on the threaded groove 42. One end of the nozzle body 61 is connected to the base 60, and the other end extends away from the base 60 and forms a bend. That is, the base 60 and the nozzle body 61 are integrally formed to form an L-shaped structure. The mist spray 62 and the liquid spray 63 are mounted on the nozzle body 61. The mist spray 62 faces the center of the desulfurization tower, and the liquid spray 63 faces the threaded groove 42 and is positioned upwards.

[0034] See Figure 1 As shown, a liquid storage space 100 is formed between the cylinder 41a and the desulfurization tower body 1, and the desulfurizing agent pipe 32 is installed on the desulfurization tower body 1 and communicates with the liquid storage space 100.

[0035] See Figure 1 As shown, two fixing blocks 9 are provided, located within the liquid storage space 100, for fixing the desulfurization tower body 1 and the cylinder 41a. In this embodiment, the fixing blocks 9 are fixed to the first connecting part 401a and the inner wall of the desulfurization tower body 1.

[0036] See Figure 1 As shown, the pressure sensor 7 is located on the surface of the fixed block 9 and between the fixed block 9 and the cylinder 41a; the main control system includes an MCU microcontroller unit, which is connected to the pressure sensor 7.

[0037] Specifically, the desulfurization tower body 1 is mainly connected to the dust collector 2 via a circulating air duct 404 structure. The dust inlet 12 at the bottom of the desulfurization tower body 1 mainly receives the flue gas to be treated. After the heating ring 5 heats the internal air significantly, expansion occurs. Combined with the air pressure of the air pump, the exhaust gas is pumped at high speed into the interior of the desulfurization tower body 1. Due to the spindle-shaped structure of the cylinder 41a (narrow at the top and bottom, wide in the middle), the airflow disperses to the inner surface of the cylinder 41a after entering. At this time, the desulfurizing agent pipe 32 sprays liquid into the liquid storage space 100. The mist spray 62 of the nozzle 6 is sprayed out from the pressure inside the nozzle 100. The base 60 is mainly fixed to the innermost side of the threaded groove 42, so that the overall spraying direction is atomized and sprayed from all four directions to the center. At the same time, along the spiral line of the threaded groove 42, a jet (liquid spray 63) is also sprayed upward along the groove. Since the nozzle 6 is set intermittently, the dust will not adhere to the surface. When it is in a clump, it will flow along the inner surface of the cylinder 41a to the threaded groove 42. It will then be driven by the wind again through the intermittent jet inside the threaded groove 42 and discharged from the exhaust port 11 at the top.

[0038] Because the first connecting part 401a is provided with a partitioned fixing block 9, and the surface of the fixing block 9 is provided with a pressure sensor 7, since the diameter of the cylinder 41a is the largest at the first connecting part 401a, the pressure when the airflow passes through will be the smallest. Through the vertical pressure of the airflow on the cylinder 41a, the spiral wind formed by the airflow on the inner wall of the spiral groove will form a rotating upward. At this time, the pressure at the first connecting part 401a is mainly constant. Therefore, when the pressure sensed by the pressure sensor 7 is small, it means that there are too many deposits inside the desulfurization tower body 1. The staff can carry out internal control cleaning or shutdown cleaning according to actual needs. In this way, while adjusting the internal wind structure, it can reduce the deposits on the inner wall. At the same time, after the airflow enters the interior, the sudden increase in the width in the middle will also reduce the wind pressure in the middle. When combined with the spiral airflow formed by the threaded groove 42, it can reduce the pressure formed on the cylinder wall inside. Meanwhile, during the operation, the pressure sensor 7 can keep the whole system under constant monitoring to determine the degree of internal deposits.

[0039] Example 2

[0040] The difference between this embodiment 2 and embodiment 1 is that the cylinder 41b in this embodiment 2 is rotatably connected to the desulfurization tower body 1, that is, the cylinder body 40b can rotate.

[0041] The following is a detailed explanation of Embodiment 2: Figure 4 As shown, the cylinder 41b of this embodiment includes two fixing rings 44b and a cylinder body 40b. The cylinder body 40b is divided into a first connecting portion 401b located in the middle and a second connecting portion 401b connected to the upper and lower sides of the first connecting portion 401b. The two fixing rings 44b are respectively fixed at the upper and lower positions of the desulfurization tower body 1, and the fixing rings 44b are circumferentially fixed to the inner wall of the desulfurization tower body 1. The cylinder body 40b is slidably sealed to the fixing rings 44b. Near the fixing rings 44b, on the side of the cylinder body 40b facing the desulfurization tower body 1, at least a portion of the cylinder body 40b is hollowed out to form a hollow portion 403b, and a toothed ring 43b is provided in the hollow portion 403b. The transmission gear 8 is mounted on the desulfurization tower body 1 and meshes with the toothed ring 43b; the transmission gear 8 is mounted on the drive motor.

[0042] The gearbox structure, consisting of the transmission gear 8 and the external drive motor, can transmit power to the gear ring 43b through the transmission gear 8. After the gear ring 43b rotates, it will drive the internal cylindrical body 40b to rotate as well.

[0043] Since the rotation direction of the main body 40b is opposite to that of the threaded groove 42, the airflow at the inner wall of the cylinder 41b will increase due to the lateral relative wind force at its surface, thereby reducing the deposits on the surface of the cylinder 41b. Furthermore, since the spiral blowing direction is opposite to that of the cylinder 41b, the non-vertical airflow will greatly reduce the wear on the inner wall of the desulfurization tower main body 1. At the same time, the spiral airflow is also more convenient to be discharged from the exhaust port 11.

[0044] Example 3

[0045] The difference between Example 3 and Example 2 is as follows: Figure 5 As shown, the cylinder 41c includes two fixing rings 44c and a cylinder body 40c. The cylinder body 40c is divided into a first connecting part 401c located in the middle and a second connecting part 401c connected to the upper and lower sides of the first connecting part 401c. The inner wall of the first connecting part 401c is parallel to the central axis 41 of the cylinder. From the first connecting part 401c away from the first connecting part 401c, the diameter of the second connecting part 401c increases sequentially. Specifically, the cylinder 41c is concave towards the center, and the second connecting part 401c is inclined relative to the central axis 41 of the cylinder. It is flared outward in the inclined direction. Therefore, when the airflow enters, the inclined inner wall of the desulfurization tower body 1 and the flared structure of the cylinder 41c both form an upper and lower spindle-shaped structure. Therefore, the structure of the middle width changes to an upper and lower width. As a result, the airflow velocity in the narrow middle section will increase, the impact on the upper and lower inlets and outlets will decrease, and the wind pressure requirement at the dust inlet 12 will decrease.

[0046] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A semi-dry desulphurization tower with reduced wall sticking and tower body wear, characterized in that, The desulfurization tower body comprises a cylinder body provided in the desulfurization tower and connected with the desulfurization tower body at both ends, a thread groove is formed on the inner wall of the cylinder body, the thread groove surrounds the central axis of the cylinder body, and the area surrounded by the inner wall of the cylinder body forms an air duct along the central axis direction. The spray head comprises a base installed on the thread groove, a spray head body connected with the base at one end and extending away from the base and forming a bending part at the other end, and a mist spray and a liquid spray installed on the spray head body, wherein the mist spray is directed to the center of the desulfurization tower, and the liquid spray is directed to the thread groove and arranged upward. The bottom end of the desulfurization tower body is provided with a dust inlet, and the dust inlet is provided with a heating ring. The desulfurization tower body is connected with the dust collector to form a circulating air duct structure, wherein the dust inlet at the bottom of the desulfurization tower body mainly enters the smoke dust to be treated, the internal air is heated by the heating ring, and the expansion phenomenon occurs, and the air pressure of the air pump is used to pump the waste gas into the inside of the desulfurization tower body at high speed, the cylinder body has a shuttle-shaped structure, and the shuttle-shaped structure has a shape of being narrow at the top and bottom and wide in the middle, and after the airflow enters, the airflow is dispersed to the inner surface of the cylinder body.

2. The semi-dry desulfurization tower for reducing wall sticking and tower body abrasion according to claim 1, wherein the cylinder body is divided into a first connecting part located at the middle position and a second connecting part connected on both sides of the first connecting part along the central axis direction of the cylinder body, wherein the inner wall of the first connecting part is parallel to the central axis of the cylinder body, and the diameter of the second connecting part gradually increases or decreases from the first connecting part to the direction away from the first connecting part. Further comprising a desulfurizing agent pipe, a liquid storage space is formed between the cylinder body and the desulfurization tower body, and the desulfurizing agent pipe is installed on the desulfurization tower body and communicates with the liquid storage space. Further comprising a fixing block located in the liquid storage space and used for fixing the desulfurization tower body and the cylinder body. Further comprising a pressure sensor located on the surface of the fixing block and between the fixing block and the cylinder body, and a main control system comprising an MCU micro control unit, wherein the MCU micro control unit is connected with the pressure sensor.

3. The semi-dry desulphurization tower of reducing wall sticking and tower body abrasion according to claim 1, characterized in that, The cylinder body comprises a fixed ring fixedly connected with the inner wall of the desulfurization tower body in the circumferential direction, and a cylinder body main body slidably connected with the fixed ring, wherein one side of the cylinder body main body is directed to the desulfurization tower body, and the cylinder body main body is provided with a gear ring.

4. The semi-dry desulphurization tower of reducing wall sticking and tower body abrasion according to claim 1, characterized in that, The semi-dry desulfurization tower further comprises a transmission gear installed on the desulfurization tower body and engaged with the gear ring, and a driving motor, wherein the transmission gear is installed on the driving motor.

5. The semi-dry desulphurization tower of reducing wall sticking and tower body abrasion according to claim 4, characterized in that, The rotation direction of the cylinder body main body is opposite to the spiral direction of the thread groove. Further comprising a dust collector, wherein the top end of the desulfurization tower body is provided with an exhaust port, the exhaust port is connected with the dust collector, the bottom end of the desulfurization tower body is connected with the dust collector through a Venturi pipe, and the top end of the dust collector is provided with an air outlet away from the exhaust port of the desulfurization tower body. ​ 6. The semi-dry desulphurization tower of reducing wall sticking and tower body abrasion according to claim 1, characterized in that, ​ ​ ​ ​ ​ ​ ​ ​ 7. The semi-dry desulphurization tower of reducing wall sticking and tower body abrasion according to claim 6, characterized in that, ​ 8. The semi-dry desulphurization tower of reducing wall sticking and tower body abrasion according to claim 1, characterized in that, ​

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