An environmentally friendly flue gas denitrification equipment

Abstract

The present invention relates to the technical field of flue gas treatment equipment, and in particular to an environmentally friendly flue gas denitrification equipment, including a reaction box, an SCR reactor and a flow pipe, the flow pipe is connected to the reaction box, a shunt block is fixedly connected in the flow pipe, and a plurality of through holes for flue gas circulation are provided on the shunt block; a shunt assembly is provided on the shunt block, and the shunt assembly includes a shunt cavity and a plurality of arc cavities provided on the shunt block, each of the arc cavities is connected to the shunt cavity, the arc cavity is sleeved on the outer side of the corresponding through hole, and a plurality of air outlets connected to the arc cavity are provided on the inner wall of the through hole. The mixing of ammonia and flue gas in the present invention is relatively sufficient and thorough, and ammonia and flue gas will enter the reaction box for reaction after sufficient contact, so that the reduction of flue gas is sufficiently thorough, the denitrification effect of flue gas is better, and it is conducive to the use of denitrification equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment equipment, and in particular to an environmentally friendly flue gas denitrification equipment. Background Art

[0002] With the continuous development of society and the continuous advancement of science and technology, the technology related to flue gas treatment equipment is also constantly improving. At present, when flue gas is treated, denitrification treatment is generally carried out, that is, ammonia or other nitrogen compounds are sprayed into the exhaust gas containing nitrogen oxides, and under the action of the catalyst, the nitrogen oxides are reduced to nitrogen and water.

[0003] At present, when the denitrification equipment for flue gas treatment is used, it is difficult to mix ammonia with the flue gas more fully, which easily leads to incomplete reduction of the flue gas and poor denitrification effect of the flue gas, which is not conducive to the use of the denitrification equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the following shortcomings in the prior art: when the denitrification equipment for flue gas treatment is currently in use, it is difficult to mix ammonia with the flue gas more fully, which easily leads to incomplete reduction of the flue gas and poor denitrification effect of the flue gas, which is not conducive to the use of the denitrification equipment, and an environmentally friendly flue gas denitrification equipment is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An environmentally friendly flue gas denitrification device comprises a reaction box, an SCR reactor and a flow pipe, wherein the flow pipe is connected to the reaction box, a diverter block is fixedly connected to the flow pipe, and a plurality of through holes for flue gas circulation are opened on the diverter block;

[0007] The diverter block is provided with a diverter assembly, which includes a diverter cavity and a plurality of arc-shaped cavities provided on the diverter block, each of the arc-shaped cavities is communicated with the diverter cavity, the arc-shaped cavity is sleeved on the outer side of the corresponding through hole, the inner wall of the through hole is provided with a plurality of air outlet holes communicated with the arc-shaped cavity, the flow pipe is fixedly connected with a diverter pipe communicated with the diverter cavity, and one end of the diverter pipe is fixedly connected with a main pipe;

[0008] A filter assembly is arranged in the circulation pipe, and the filter assembly is used to filter large particles of impurities in the smoke. The filter assembly includes a filter net. The inner walls on both sides of the circulation pipe are fixedly connected with ear plates. The filter net is arranged above the two ear plates, and a positioning assembly is arranged on each ear plate.

[0009] Preferably, each of the positioning components comprises a rectangular block fixedly mounted on the upper surface of the ear plate, the filter screen is provided with two rectangular openings for connecting the rectangular block, and a horizontally arranged limit rod is slidably connected inside the rectangular block.

[0010] Preferably, each of the rectangular blocks is provided with an installation cavity, an inner wall of one side of the installation cavity is provided with a sliding groove, a slider is slidably connected in the sliding groove, a rotating rod is hinged on the lower surface of the slider, the rotating rod and the limit rod are hinged, a limiting shaft is fixedly connected to the inner wall of one side of the installation cavity, the cross-section of the limiting rod is arranged in a circular ring shape, and the limiting rod and the limiting shaft are slidably connected.

[0011] Preferably, the upper surface of each of the sliding blocks is rotatably connected to a vertically arranged threaded rod, and the threaded rod is threadedly connected to the rectangular block.

[0012] Preferably, a rotating shaft having a T-shaped cross section is rotatably connected to the circulation tube, a guide plate is fixedly connected to the rotating shaft, and a surface of the guide plate is in contact with an inner wall of the circulation tube.

[0013] Preferably, the rotating shaft passes through one end of the circulation tube and is provided with a plurality of equidistantly arranged circular holes, a slot is provided on one side of the circulation tube, and the rotating shaft is connected to the slot via an insert shaft.

[0014] Preferably, an inspection port and a discharge port are provided on the circulation pipe, a cover plate is installed in the inspection port, the cover plate is connected to the circulation pipe by two bolts, a threaded groove for connecting the bolts is provided on the circulation pipe, and a sealing door is clamped in the inspection port.

[0015] Preferably, a fixing rod is slidably connected to the circulation tube, one end of the fixing rod is fixedly connected to a scraper, and the upper end surface of the scraper is in contact with the lower surface of the filter screen.

[0016] Preferably, a spring is sleeved on the fixing rod, one end of the spring is fixedly connected to the fixing rod, and the other end of the spring is fixedly connected to the inner wall of the circulation tube.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Ammonia flows into the inside of the shunt cavity through the shunt pipe, and then flows into the inside of each arc cavity through the shunt cavity, and enters the inside of the through hole through multiple air outlets. When ammonia enters the inside of the through hole through multiple air outlets from different angles, ammonia can be well mixed with the flue gas passing through the through hole, and the mixing of ammonia and flue gas is relatively sufficient and thorough. After the ammonia and flue gas are fully contacted, they will enter the reaction box to react, so that the reduction of the flue gas is sufficiently thorough, the denitration effect of the flue gas is better, and it is conducive to the use of the denitration equipment;

[0019] During the relative sliding of the limit rod and the limit shaft, one end of the limit rod will penetrate the rectangular block and contact the upper surface of the filter. Under the joint limiting action of the two limit rods and the ear plate, the filter can be firmly installed in the circulation pipe. Similarly, when the filter is severely blocked or damaged due to long-term use, it is convenient to remove, clean or replace the filter in time, which is beneficial to the use of the denitrification equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front structure of an environmentally friendly flue gas denitrification device proposed by the present invention;

[0021] Figure 2 A schematic diagram of the side structure of an environmentally friendly flue gas denitrification device proposed by the present invention;

[0022] Figure 3 This is a schematic diagram of a partial front cross-sectional structure of an environmentally friendly flue gas denitration device proposed by the present invention;

[0023] Figure 4 It is a schematic diagram of the partial front cross-sectional structure of the flow tube and the rectangular block in the present invention;

[0024] Figure 5 It is a schematic diagram of a top view and a partial cross-sectional structure of a flow pipe and a flow dividing block in the present invention;

[0025] Figure 6 It is a schematic diagram of a partial cross-sectional structure of a flow pipe and a filter screen in the present invention when viewed from above;

[0026] Figure 7 It is a schematic diagram of the partial front cross-sectional structure of the rectangular block and the filter screen in the present invention.

[0027] In the figure: 1 reaction box, 2 flow pipe, 3 cover plate, 4 main pipe, 5 diversion pipe, 6 rotating shaft, 7 fixed rod, 8 sealing door, 9 guide plate, 10 scraper, 11 rectangular block, 12 diversion block, 13 through hole, 14 plug shaft, 15 air outlet, 16 arc cavity, 17 diversion cavity, 18 threaded rod, 19 filter screen, 20 round hole, 21 ear plate, 22 limit rod, 23 rotating rod, 24 slider, 25 limit shaft, 26 installation cavity, 27 spring, 28 bolt, 29 slide groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1-Figure 7 An environmentally friendly flue gas denitrification device includes a reaction box 1, an SCR reactor and a flow pipe 2 (the SCR reactor is a prior art and its working principle is not described in detail). The flow pipe 2 is connected to the reaction box 1, and a diverter block 12 is fixedly connected to the flow pipe 2. The diverter block 12 is provided with a plurality of through holes 13 for flue gas circulation, and the plurality of through holes 13 are evenly and equidistantly arranged.

[0030] A diversion assembly is provided on the diversion block 12, and the diversion assembly includes a diversion chamber 17 and a plurality of arc chambers 16 provided on the diversion block 12, each arc chamber 16 is connected to the diversion chamber 17, the arc chamber 16 is sleeved on the outer side of the corresponding through hole 13, and the inner wall of the through hole 13 is provided with a plurality of air outlet holes 15 connected to the arc chamber 16, a diversion pipe 5 connected to the diversion chamber 17 is fixedly connected to the flow pipe 2, and one end of the diversion pipe 5 is fixedly connected to the main pipe 4, a filter assembly is provided in the flow pipe 2, and the filter assembly is used to filter large particles of impurities in the smoke, and the filter assembly includes a filter screen 19, and ear plates 21 are fixedly connected to the inner walls of both sides of the flow pipe 2, and the filter screen 19 is arranged above the two ear plates 21, and a positioning assembly is provided on each ear plate 21.

[0031] Each positioning assembly includes a rectangular block 11 fixedly mounted on the upper surface of the ear plate 21, and two rectangular openings for connecting the rectangular block 11 are provided on the filter screen 19. A horizontally arranged limit rod 22 is slidably connected inside the rectangular block 11. An installation cavity 26 is provided on each rectangular block 11, and a slide groove 29 is provided on an inner wall on one side of the installation cavity 26. A slider 24 is slidably connected in the slide groove 29. A rotating rod 23 is hinged on the lower surface of the slider 24. The rotating rod 23 and the limit rod 22 are hinged. A limit shaft 25 is fixedly connected to an inner wall on one side of the installation cavity 26, and the cross-section of the limit rod 22 is arranged in a circular ring shape.

[0032] The limit rod 22 is slidably connected to the limit shaft 25, and the upper surface of each slider 24 is rotatably connected with a vertically arranged threaded rod 18, and the threaded rod 18 is threadedly connected to the rectangular block 11. When the two threaded rods 18 are rotated and each threaded rod 18 is threadedly connected to the corresponding rectangular block 11, the slider 24 will be driven to move downward, and the inclination angle of the rotating rod 23 will change at the same time. The limit rod 22 will slide relative to the limit shaft 25 at the same time. After the limit rod 22 moves, one end of the limit rod 22 will penetrate the rectangular block 11 and contact the upper surface of the filter screen 19. Under the joint limiting action of the two limit rods 22 and the ear plate 21, the filter screen 19 can be firmly installed in the circulation pipe 2.

[0033] A rotating shaft 6 with a T-shaped cross section is rotatably connected to the circulation tube 2, and a guide plate 9 is fixedly connected to the rotating shaft 6. The surface of the guide plate 9 fits the inner wall of the circulation tube 2. A plurality of equidistant circular holes 20 are provided at one end of the rotating shaft 6 that passes through the circulation tube 2. A card slot is provided on one side of the circulation tube 2. The rotating shaft 6 is connected to the card slot through an insertion shaft 14. In the initial state, one side surface of the guide plate 9 fits the inner wall of one side of the circulation tube 2. At this time, the guide plate 9 is vertically arranged. The insertion shaft 14 is pulled outward so that the insertion shaft 14 and the corresponding circular hole 20 slide relative to each other, and one end of the insertion shaft 14 is disengaged from the card slot. Then, the rotating shaft 6 is rotated. During the process of the guide plate 9 rotating together with the rotating shaft 6, one end of the guide plate 9 will contact the inner wall of the other side of the circulation tube 2. At this time, the guide plate 9 is inclined, and impurities on the lower surface of the filter screen 19 can fall onto the guide plate 9.

[0034] An inspection port and a discharge port are provided on the circulation pipe 2, and a cover plate 3 is installed in the inspection port. The cover plate 3 is connected to the circulation pipe 2 by two bolts 28. A threaded groove for connecting the bolt 28 is provided on the circulation pipe 2. One end of the bolt 28 passes through the cover plate 3 and is threadedly connected to the threaded groove to prevent the cover plate 3 and the circulation pipe 2 from being separated. A sealing door 8 is clamped in the inspection port. The sealing door 8 and the cover plate 3 have good sealing properties when connected to the circulation pipe 2. The sealing door 8 is removed to facilitate the discharge of impurities on the guide plate 9. The bolt 28 is turned to separate one end of the bolt from the threaded groove, so that the cover plate 3 and the inspection port can be separated.

[0035] A fixed rod 7 is slidably connected to the circulation tube 2, and one end of the fixed rod 7 is fixedly connected to a scraper 10, the upper end surface of the scraper 10 fits against the lower surface of the filter screen 19, and a spring 27 is sleeved on the fixed rod 7, one end of the spring 27 is fixedly connected to the fixed rod 7, and the other end of the spring 27 is fixedly connected to the inner wall of the circulation tube 2. In the initial state, one side surface of the scraper 10 fits against the inner wall of the circulation tube 2, and the fixed rod 7 is pulled outward. During the relative sliding of the fixed rod 7 and the circulation tube 2, the spring 27 is compressed and deformed. During the movement of the scraper 10 along with the fixed rod 7, the upper end of the scraper 10 will move close to the lower surface of the filter screen 19, thereby scraping off impurities attached to the lower surface of the filter screen 19 to prevent the filter screen 19 from being blocked.

[0036] In the present invention, when in use, flue gas is introduced from the lower port of the circulation pipe 2. During the rising process inside the circulation pipe 2, the flue gas will pass through the filter screen 19. The filter screen 19 can filter out large particles of impurities mixed in the flue gas. The flue gas with impurities filtered out will pass through each through hole 13, and at the same time, a sufficient amount of ammonia gas is introduced into the main pipe 4. The ammonia gas flows into the inside of the shunt chamber 17 through the shunt pipe 5, and the ammonia gas will flow into the inside of each arc cavity 16 through the shunt chamber 17, and pass through a plurality of air outlet holes 15 to enter the inside of the through hole 13. The plurality of air outlet holes 15 are relatively evenly arranged on the inner wall of the through hole 13. The ammonia gas will enter the through hole 13 from different angles through the plurality of air outlet holes 15, so that the ammonia gas can be better mixed with the flue gas passing through the through hole 13, and the mixing of the ammonia gas and the flue gas is relatively sufficient and thorough. After the ammonia gas and the flue gas are fully contacted, they will enter the reaction box 1 to react, so that the reduction of the flue gas is sufficiently thorough, the denitration effect of the flue gas is better, and it is beneficial to the use of the denitration equipment.

[0037] During installation, open the cover plate 3, pass the filter screen 19 through the inspection port and extend it into the interior of the circulation pipe 2, then move the filter screen 19 downward until the lower surface of the filter screen 19 fits with the upper surfaces of the two ear plates 21, and the two rectangular blocks 11 pass through the corresponding rectangular openings. At this time, the limit rod 22 shrinks inside the rectangular block 11, and then the two threaded rods 18 are rotated. During the process of each threaded rod 18 being threadedly connected with the corresponding rectangular block 11, the slider 24 will be driven to move downward, and the inclination angle of the rotating rod 23 will change at the same time. The limit rod 22 will slide relative to the limit shaft 25 at the same time. After the limit rod 22 moves, one end of the limit rod 22 will pass through the rectangular block 11 and contact the upper surface of the filter screen 19. Under the limiting action of the two limit rods 22, the filter screen 19 can be firmly installed in the circulation pipe 2. Similarly, when the filter screen 19 is severely blocked or damaged due to long-term use, it is convenient to take out, clean or replace the filter screen 19 in time, which is beneficial to the use of the denitrification equipment.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An environmentally friendly flue gas denitrification device, comprising a reaction box (1), an SCR reactor and a flow pipe (2), characterized in that: The flow pipe (2) is in communication with the reaction box (1), a flow dividing block (12) is fixedly connected inside the flow pipe (2), and a plurality of through holes (13) for smoke flow are provided on the flow dividing block (12); The diverter block (12) is provided with a diverter assembly, the diverter assembly comprising a diverter cavity (17) and a plurality of arc-shaped cavities (16) provided on the diverter block (12), each of the arc-shaped cavities (16) being in communication with the diverter cavity (17), the arc-shaped cavities (16) being sleeved on the outer side of the corresponding through hole (13), the inner wall of the through hole (13) being provided with a plurality of air outlet holes (15) in communication with the arc-shaped cavities (16), the flow pipe (2) being fixedly connected with a diverter pipe (5) in communication with the diverter cavity (17), one end of the diverter pipe (5) being fixedly connected with a main pipe (4); A filter assembly is arranged in the circulation pipe (2), and the filter assembly is used to filter large particles of impurities in the smoke. The filter assembly comprises a filter screen (19). The inner walls on both sides of the circulation pipe (2) are fixedly connected to ear plates (21). The filter screen (19) is arranged above the two ear plates (21), and each ear plate (21) is provided with a positioning assembly.

2. The environmentally friendly flue gas denitrification equipment according to claim 1, characterized in that: Each of the positioning components comprises a rectangular block (11) fixedly mounted on the upper surface of the ear plate (21); the filter screen (19) is provided with two rectangular openings for connecting the rectangular block (11); and a horizontally arranged limiting rod (22) is slidably connected inside the rectangular block (11).

3. The environmentally friendly flue gas denitrification equipment according to claim 2, characterized in that: Each of the rectangular blocks (11) is provided with an installation cavity (26), a slide groove (29) is provided on one inner wall of the installation cavity (26), a slider (24) is slidably connected in the slide groove (29), a rotating rod (23) is hingedly connected to the lower surface of the slider (24), the rotating rod (23) and the limit rod (22) are hingedly connected, a limit shaft (25) is fixedly connected to the inner wall of one side of the installation cavity (26), the cross section of the limit rod (22) is arranged in a circular ring shape, and the limit rod (22) and the limit shaft (25) are slidably connected.

4. The environmentally friendly flue gas denitrification equipment according to claim 3, characterized in that: The upper surface of each slider (24) is rotatably connected to a vertically arranged threaded rod (18), and the threaded rod (18) is threadedly connected to the rectangular block (11).

5. The environmentally friendly flue gas denitrification equipment according to claim 1, characterized in that: A rotating shaft (6) having a T-shaped cross section is rotatably connected to the circulation tube (2), a guide plate (9) is fixedly connected to the rotating shaft (6), and a surface of the guide plate (9) is in contact with the inner wall of the circulation tube (2).

6. The environmentally friendly flue gas denitrification equipment according to claim 5, characterized in that: One end of the rotating shaft (6) passing through the circulation tube (2) is provided with a plurality of circular holes (20) arranged at equal intervals, one side of the circulation tube (2) is provided with a slot, and the rotating shaft (6) is connected to the slot via an insertion shaft (14).

7. The environmentally friendly flue gas denitrification equipment according to claim 1, characterized in that: The circulation pipe (2) is provided with an inspection port and a discharge port, a cover plate (3) is installed in the inspection port, the cover plate (3) is connected to the circulation pipe (2) via two bolts (28), a threaded groove for connecting the bolts (28) is provided on the circulation pipe (2), and a sealing door (8) is clamped in the inspection port.

8. The environmentally friendly flue gas denitrification equipment according to claim 1, characterized in that: A fixing rod (7) is slidably connected to the circulation pipe (2), one end of the fixing rod (7) is fixedly connected to a scraper (10), and the upper end surface of the scraper (10) is in contact with the lower surface of the filter screen (19).

9. The environmentally friendly flue gas denitrification equipment according to claim 8, characterized in that: A spring (27) is sleeved on the fixing rod (7), one end of the spring (27) is fixedly connected to the fixing rod (7), and the other end of the spring (27) is fixedly connected to the inner wall of the circulation pipe (2).

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