Airflow uniform distribution device suitable for cross-flow calcium-based fixed bed desulfurization tower

Abstract

The invention discloses an airflow uniform distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower, and relates to the technical field of cross-flow calcium-based fixed beds, the airflow uniform distribution device comprises a tower body and two groups of filler layers arranged in the tower body, and a uniform distribution mechanism is arranged in the tower body; through the designed uniform distribution mechanism, flue gas enters the tower body and then passes through the second flow guide shutter, the first flow guide shutter and the third flow guide shutter with certain angles during use, so that the flue gas is forced to pass through the filler layer orderly and uniformly in a long-flow manner, the residence time of the flue gas in the filler layer is prolonged, and the flue gas is prevented from entering the tower body. The purposes of improving the use efficiency of a desulfurizing agent and improving the desulfurization efficiency are achieved, the retention time of flue gas entering the filler layer can be prolonged through the short circuit prevention plate, the flue gas entering the filler layer can be filtered through the filter screen, impurities attached to the surface of the filter screen can be cleaned through the strip brush and the rolling brush, and the service life of the filter screen is prolonged. And the flue gas can smoothly enter the filler layer, so that the desulfurization effect on the flue gas is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cross-flow calcium-based fixed bed, and in particular is an airflow uniform distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower. Background Art

[0002] Calcium-based fixed-bed dry desulfurization is the mainstream low-sulfur flue gas treatment technology in recent years. It uses particles with Ca(OH)2 as the main component as the desulfurizer. According to the different flue gas flow directions, this technology can be subdivided into two forms of fixed-bed desulfurization tower structures: cross-flow and convection. The cross-flow fixed bed is divided into 2 packing layers and 3 flue gas circulation layers. The 2 packing layers are filled with desulfurizers, and the middle part is divided into upper and lower parts by a partition. The lower part is the flue gas inlet, and the upper part is the flue gas outlet. After the flue gas enters the fixed-bed desulfurization tower horizontally through the inlet, the left and right diversions horizontally pass through the packing layer, enter the outer flue gas side, flow upward, and then pass through the packing layer horizontally. The flue gas removes SO2 in the flue gas during the two horizontal passages through the material layer, and the clean flue gas is discharged from the outlet.

[0003] The existing packing layer uses louvers and wire mesh structures on both sides to confine the desulfurizer in the packing layer, and at the same time plays a partial diversion role. However, such a structure has the problem that the louvers are in the same direction from top to bottom, the airflow uniformity is poor, resulting in insufficient utilization of the desulfurizer, and the distance between the packing layers on both sides connected to the partition is too short, the flue gas is easily short-circuited, the flue gas does not stay in the packing layer for enough time, and the desulfurization efficiency is low. Moreover, the flue gas directly passes through the louvers and then enters the packing layer. It is easy for many impurities in the flue gas to adhere to the surface of the packing layer, causing the impurities to block the surface of the packing layer, affecting the flow rate of the flue gas through the packing layer. For this reason, we propose an airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower. Summary of the invention

[0004] The object of the present invention is to provide an air flow distribution device suitable for a cross-flow calcium-based fixed-bed desulfurization tower to solve the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an airflow uniform distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower, comprising a tower body and two groups of packing layers arranged inside the tower body, wherein a uniform distribution mechanism is arranged inside the tower body, and the uniform distribution mechanism comprises:

[0006] The flow guide component is arranged inside the tower body and is used to prolong the residence time of the flue gas inside the packing layer;

[0007] The filter assembly is arranged on the flow guide assembly and is used for filtering the smoke entering the packing layer.

[0008] Preferably, the guide assembly includes two groups of second frames and two groups of first frames, guide louvers three and guide louvers two are fixedly provided on the second frames, guide louvers one is fixedly provided on the first frames, an airflow baffle is fixedly provided between the two groups of the second frames, and anti-short-circuit plates are fixedly provided on both sides of the airflow baffle.

[0009] Preferably, the filter assembly includes a filter screen fixed at the bottom of the side of the second frame and four groups of screw rods rotatably arranged inside the tower body, nut seats are arranged outside the screw rods, connecting rods are fixedly arranged between two groups of nut seats, side length blocks are fixedly arranged on the outer walls of the nut seats, and strip brushes are fixedly arranged on the sides of the side length blocks.

[0010] Preferably, a plurality of groups of connecting plates are evenly distributed at the bottom of the side long block and along the length direction of the side long block, and a roller brush is rotatably provided on the side of the connecting plate;

[0011] An outer gear ring is sleeved and fixed on the outside of the roller brush, and internal and external toothed transmission belts are sleeved between multiple groups of the outer gear rings.

[0012] Preferably, two groups of vertical tooth plates are fixedly provided on the inner wall of the tower body, and a rotating gear is rotatably provided on the side surface of the side long block, and the rotating gear is meshingly connected with the vertical tooth plates and the internal and external tooth transmission belts.

[0013] Preferably, a lower belt is sleeved between the bottoms of the plurality of groups of screw rods, and a driving motor is fixedly disposed at the bottom of the tower body.

[0014] Preferably, a collecting and discharging member is provided at the bottom of the inner wall of the tower body, and the collecting and discharging member includes a collecting bucket fixed at the bottom of the tower body, a discharge pipe is fixedly provided at the bottom of the collecting bucket, an L-shaped frame is fixedly provided at the bottom of the inner wall of the tower body, and a horizontal brush is provided on the L-shaped frame by rotating through a rotating shaft.

[0015] Preferably, two groups of pillars are fixedly provided on the outside of the horizontal brush, a bottom ring is fixedly provided on the bottom of the pillar, and a rotating belt is sleeved between the bottom ring and the outer wall of the screw rod.

[0016] Preferably, two groups of steel wire mesh sheets are arranged outside the packing layer, and a feed port is arranged on the top of the packing layer.

[0017] Preferably, an inlet and an outlet are respectively opened on the front side of the tower body.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The present invention has a uniform distribution mechanism. When the flue gas enters the tower body, it will pass through the guide louvers 2, 1 and 3 with a certain angle, forcing the flue gas to pass through the packing layer in an orderly, uniform and long flow, thereby extending the residence time of the flue gas in the packing layer, thereby achieving the purpose of improving the use efficiency of the desulfurizer and improving the desulfurization efficiency. In addition, the anti-short circuit plate can increase the residence time of the flue gas in the packing layer, avoiding the situation where the flue gas directly enters the packing layer from the position connected to the partition and then is discharged due to the short distance, which makes the flue gas residence time short. The flue gas flow rate is increased, thereby increasing the residence time, ensuring the uniform distribution of the airflow in the desulfurization tower, reducing the existence of desulfurization dead zones, and the flue gas entering the packing layer can be filtered by the filter screen. At the same time, the impurities attached to the surface of the filter screen can be cleaned by the strip brush and the roller brush, so that the flue gas can smoothly enter the packing layer, thereby improving the desulfurization effect of the flue gas.

[0020] (2) The collecting and discharging part of the present invention can sweep the impurities dropped from the surface of the cleaning filter into the collecting bucket through the rotating horizontal brush, thereby collecting the dropped impurities and automatically cleaning them, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the tower body of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the filter assembly of the present invention;

[0024] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of the middle part A;

[0025] Figure 5 It is a schematic diagram of the top view of the side length block and the strip brush of the present invention;

[0026] Figure 6 For the present invention Figure 5 The enlarged structural diagram of the middle B part;

[0027] Figure 7 It is a schematic diagram of the structure of the horizontal brush and the bottom ring of the present invention;

[0028] Figure 8 It is a schematic diagram of the top view of the roller brush and filter screen of the present invention;

[0029] Fig. 9 For the present invention Figure 8 The enlarged structural diagram of the middle C part;

[0030] Fig.10It is a side view structural schematic diagram of the roller brush, the outer gear ring and the inner and outer gear transmission belt of the present invention;

[0031] In the figure: 100, tower body; 101, inlet; 102, outlet; 103, feed port; 104, packing layer; 105, air flow baffle; 200, filter screen; 201, lower belt; 202, first frame; 203, wire mesh; 204, guide louver 1; 205, guide louver 2; 206, guide louver 3; 207, short circuit prevention plate; 208, second frame; 209, vertical teeth Plate; 210, side long block; 211, screw rod; 212, internal and external tooth transmission belt; 213, roller brush; 214, external gear ring; 215, connecting plate; 216, connecting rod; 217, strip brush; 218, nut seat; 219, rotating gear; 300, collecting bucket; 301, driving motor; 302, L-shaped frame; 303, rotating belt; 304, horizontal brush; 305, bottom ring; 306, pillar. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The present invention provides a technical solution: an air flow distribution device suitable for a cross-flow calcium-based fixed-bed desulfurization tower, comprising a tower body 100 and two groups of packing layers 104 arranged inside the tower body 100, the packing layer 104 is a desulfurizer, and a distribution mechanism is arranged inside the tower body 100, and the distribution mechanism includes a guide component and a filter component.

[0035] The guide assembly includes two groups of second frames 208 and two groups of first frames 202. The second frames 208 are respectively fixed with guide louvers three 206 and guide louvers two 205. The first frames 202 are fixed with guide louvers one 204. An airflow baffle 105 is fixed between the two groups of second frames 208. Anti-short-circuit plates 207 are fixed on both sides of the airflow baffle 105. The anti-short-circuit plates 207 ensure the uniform distribution of airflow inside the desulfurization tower and reduce the existence of desulfurization dead zones.

[0036] Embodiment 2

[0037] Based on Example 1, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 and Fig.10 The filter assembly includes a filter screen 200 fixed to the bottom of the side of the second frame 208 and four sets of screw rods 211 rotatably arranged inside the tower body 100, a nut seat 218 is arranged outside the screw rod 211, a connecting rod 216 is fixedly arranged between two sets of nut seats 218, a side long block 210 is fixedly arranged on the outer wall of the nut seat 218, and a strip brush 217 is fixedly arranged on the side of the side long block 210, and the strip brush 217 and the rotating roller brush 213 clean the impurities attached to the surface of the filter screen 200;

[0038] A plurality of connecting plates 215 are evenly distributed at the bottom of the side long block 210 and along the length direction of the side long block 210, and a roller brush 213 is rotatably arranged on the side of the connecting plate 215;

[0039] An outer gear ring 214 is fixedly sleeved on the outside of the roller brush 213, and an inner and outer gear transmission belt 212 is sleeved between the multiple sets of outer gear rings 214. The inner and outer gear transmission belt 212 can drive the multiple sets of roller brushes 213 to rotate;

[0040] Two sets of vertical tooth plates 209 are fixedly arranged on the inner wall of the tower body 100, and a rotating gear 219 is rotatably arranged on the side of the side long block 210, and the rotating gear 219 is meshedly connected with the vertical tooth plates 209 and the internal and external tooth transmission belts 212;

[0041] The bottom of the screw rod 211 extends to the outside of the bottom of the tower body 100 , a lower belt 201 is sleeved between the bottoms of the multiple groups of screw rods 211 , a drive motor 301 is fixedly installed at the bottom of the tower body 100 , and the working end of the drive motor 301 extends to the bottom of the screw rod 211 .

[0042] The present invention adopts a uniform distribution mechanism. When the flue gas enters the tower body 100, it will pass through the guide louver 205, the guide louver 104 and the guide louver 306 with a certain angle, so as to force the flue gas to pass through the packing layer 104 in an orderly, uniform and long process, thereby prolonging the residence time of the flue gas in the packing layer 104, thereby achieving the purpose of improving the use efficiency of the desulfurizer and improving the desulfurization efficiency. In addition, the anti-short circuit plate 207 can increase the residence time of the flue gas in the packing layer 104, thereby preventing the flue gas from passing through the airflow partition plate 105. The distance caused by the flue gas directly entering the packing layer 104 and then being discharged is too short, which shortens the residence time of the flue gas. The flue gas flow is increased, thereby increasing the residence time, ensuring the uniform distribution of the airflow inside the desulfurization tower, and reducing the existence of desulfurization dead zones. The flue gas entering the packing layer 104 can be filtered through the filter 200, and the impurities attached to the surface of the filter 200 can be cleaned through the strip brush 217 and the roller brush 213, so that the flue gas can smoothly enter the packing layer 104, thereby improving the desulfurization effect of the flue gas.

[0043] During use, the flue gas enters the tower body 100 from the inlet 101 and passes through the filter 200, and the impurities in the flue gas are filtered by the filter 200, and then enters the packing layer 104 for purification through the guide louver 205 with a certain angle, and then enters the inner sides of the tower body 100 through the guide louver 1 204 with a certain angle, and then enters the packing layer 104 for purification through the guide louver 1 204 with a certain angle, and then passes through the guide louver 3 206 with a certain angle and is discharged from the outlet 102, forcing the flue gas to pass through the packing layer 104 in an orderly, uniform, and long process, prolonging the residence time of the flue gas in the packing layer 104, so that the desulfurizer can react with the flue gas more fully, so as to improve the use efficiency of the desulfurizer and enhance For the purpose of desulfurization efficiency, the flue gas will pass through the steel mesh 203 when entering the packing layer 104 and when going out of the packing layer 104. The steel mesh 203 limits the desulfurizer in the packing layer 104 in the packing layer 104. The anti-short circuit plate 207 is arranged on both sides of the air flow baffle 105. At this time, the flue gas will enter the packing layer 104 from the guide louver 205 far away from the anti-short circuit plate 207, which can increase the residence time of the flue gas entering the packing layer 104, avoid the situation that the flue gas directly enters the packing layer 104 from the position connected to the air flow baffle 105 and then is discharged, resulting in a short distance, which makes the flue gas residence time short, increase the flue gas flow, thereby increasing the residence time, ensuring the uniform distribution of the airflow inside the desulfurization tower, and reducing the existence of desulfurization dead zone;

[0044] When the filter 200 is used for a long time, a lot of impurities will be attached to the surface of the filter 200. At this time, the impurities will affect the speed of smoke passing through the filter 200. At this time, the impurities are cleaned. When cleaning, the drive motor 301 is turned on. The drive motor 301 drives one group of screw rods 211 to rotate, thereby driving the remaining screw rods 211 to rotate under the drive of the lower belt 201. At this time, the nut seat 218 located on the screw rod 211 moves downward, driving the side long block 210 and the connecting plate 215 to move, thereby driving the strip brush 217 and the roller brush 213 to move downward. At this time, the impurities attached to the surface of the filter 200 can be removed by the strip brush 217 and the roller brush 213. The cleaning is carried out, and the rotating gear 219 is driven to rotate on the vertical tooth plate 209 while moving downward, and then the inner and outer tooth transmission belt 212 is driven to rotate, and then the outer gear ring 214 and the roller brush 213 are driven to rotate through the rotating inner and outer tooth transmission belt 212. While moving up and down to clean impurities, the impurities are cleaned by the rotating roller brush 213 to increase the cleaning effect. When the strip brush 217 and the roller brush 213 move downward to the appropriate position, the driving motor 301 is reversed, and the nut seat 218 can be driven to move upward, and then the strip brush 217 and the roller brush 213 can be driven to move upward. This reciprocating process can be repeated many times to carry out cleaning.

[0045] Embodiment 3

[0046] Based on Example 2, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 A collecting and discharging member is provided at the bottom of the inner wall of the tower body 100, and the collecting and discharging member includes a collecting bucket 300 fixed at the bottom of the tower body 100, and a discharging pipe is fixedly provided at the bottom of the collecting bucket 300. An L-shaped frame 302 is fixedly provided at the bottom of the inner wall of the tower body 100, and a horizontal brush 304 is rotatably provided on the L-shaped frame 302 through a rotating shaft. When the horizontal brush 304 rotates, it is connected to the top L-shaped frame 302 through the rotating shaft;

[0047] Two groups of pillars 306 are fixedly provided on the outside of the horizontal brush 304 , a bottom ring 305 is fixedly provided on the bottom of the pillar 306 , and a rotating belt 303 is sleeved between the bottom ring 305 and the outer wall of the screw rod 211 .

[0048] The collecting and discharging member designed in the present invention can sweep the impurities dropped from the surface of the cleaning filter 200 into the collecting bucket 300 through the rotating horizontal brush 304, so that the dropped impurities can be collected and automatically cleaned, which is convenient to use.

[0049] During the cleaning process, impurities will fall. The discharge pipe below the collecting bucket 300 is connected to the external dust removal equipment in advance. The negative pressure pump in the dust removal equipment will generate negative pressure to cause the collecting bucket 300 to generate negative pressure. At this time, the fallen impurities can be sucked in and transported to the dust removal equipment for dust removal. When the screw 211 rotates, the rotating belt 303 is driven to rotate. The rotating rotating belt 303 drives the bottom ring 305 to rotate. The bottom ring 305 drives the horizontal brush 304 to rotate through the support 306, thereby sweeping the impurities that fall on the bottom of the inner wall of the tower body 100 to make them fly away, making it convenient to suck the scattered impurities through the collecting bucket 300, thereby increasing the collection effect.

[0050] In this embodiment, two groups of steel mesh sheets 203 are arranged outside the packing layer 104 . The steel mesh sheets 203 confine the desulfurizer within the area of ​​the packing layer 104 . A feed port 103 is arranged at the top of the packing layer 104 .

[0051] In this embodiment, an inlet 101 and an outlet 102 are respectively opened on the front side of the tower body 100 .

[0052] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. An airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower, comprising a tower body (100) and two groups of packing layers (104) arranged inside the tower body (100), characterized in that: A uniform distribution mechanism is arranged inside the tower body (100), and the uniform distribution mechanism comprises: A flow guide component is arranged inside the tower body (100) and is used to prolong the residence time of the smoke inside the packing layer (104); The filter assembly is arranged on the flow guide assembly and is used to filter the smoke entering the packing layer (104).

2. The airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower according to claim 1, characterized in that: The flow guide assembly comprises two groups of second frames (208) and two groups of first frames (202); flow guide louvers three (206) and flow guide louvers two (205) are fixedly arranged on the second frames (208), respectively; flow guide louvers one (204) are fixedly arranged on the first frames (202); an airflow baffle (105) is fixedly arranged between the two groups of the second frames (208); and short-circuit prevention plates (207) are fixedly arranged on both sides of the airflow baffle (105).

3. The airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower according to claim 2, characterized in that: The filter assembly comprises a filter screen (200) fixed at the bottom of the side of the second frame (208) and four groups of screw rods (211) rotatably arranged inside the tower body (100), a nut seat (218) is arranged outside the screw rod (211), a connecting rod (216) is fixedly arranged between two groups of nut seats (218), a side length block (210) is fixedly arranged on the outer wall of the nut seat (218), and a strip brush (217) is fixedly arranged on the side of the side length block (210).

4. The airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower according to claim 3, characterized in that: A plurality of groups of connecting plates (215) are evenly distributed at the bottom of the side long block (210) and along the length direction of the side long block (210), and a roller brush (213) is rotatably provided on the side of the connecting plate (215); An outer gear ring (214) is sleeved and fixed on the outside of the roller brush (213), and an inner and outer gear transmission belt (212) is sleeved between multiple groups of the outer gear rings (214).

5. The airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower according to claim 4, characterized in that: Two groups of vertical tooth plates (209) are fixedly arranged on the inner wall of the tower body (100), and a rotating gear (219) is rotatably arranged on the side of the side long block (210). The rotating gear (219) is meshedly connected with the vertical tooth plates (209) and the internal and external tooth transmission belts (212).

6. The airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower according to claim 3, characterized in that: A lower belt (201) is sleeved between the bottoms of the plurality of groups of screw rods (211), and a driving motor (301) is fixedly arranged at the bottom of the tower body (100).

7. The airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower according to claim 6, characterized in that: A collecting and discharging member is provided at the bottom of the inner wall of the tower body (100), the collecting and discharging member comprising a collecting bucket (300) fixed to the bottom of the tower body (100), a discharging pipe being fixedly provided at the bottom of the collecting bucket (300), an L-shaped frame (302) being fixedly provided at the bottom of the inner wall of the tower body (100), and a horizontal brush (304) being rotatably provided on the L-shaped frame (302) via a rotating shaft.

8. The airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower according to claim 7, characterized in that: Two groups of pillars (306) are fixedly arranged outside the horizontal brush (304), a bottom ring (305) is fixedly arranged at the bottom of the pillar (306), and a rotating belt (303) is sleeved between the bottom ring (305) and the outer wall of the screw rod (211).

9. The airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower according to claim 1, characterized in that: Two groups of steel wire mesh sheets (203) are arranged outside the packing layer (104), and a feed port (103) is arranged at the top of the packing layer (104).

10. The airflow distribution device suitable for a cross-flow calcium-based fixed bed desulfurization tower according to claim 1, characterized in that: An inlet (101) and an outlet (102) are respectively provided on the front side of the tower body (100).

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