CN115646187B - Variable inlet flow guiding device and denitration reactor using same - Google Patents
Variable inlet flow guiding device and denitration reactor using same Download PDFInfo
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- CN115646187B CN115646187B CN202211357829.8A CN202211357829A CN115646187B CN 115646187 B CN115646187 B CN 115646187B CN 202211357829 A CN202211357829 A CN 202211357829A CN 115646187 B CN115646187 B CN 115646187B
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Abstract
The utility model provides a variable entry guiding device, includes one-level guiding unit, one-level guiding unit sets up at denitration top of the tower end and is connected with the intake duct, and it includes the division board, the division board sets up in the inboard below of denitration top of the tower board, forms the water conservancy diversion chamber with the roof between, and the mixed gas can enter into the water conservancy diversion chamber from the intake duct, be provided with a plurality of air ducts that rotate the connection on the division board, the upper end of air duct stretches into the water conservancy diversion chamber, and its lower extreme stretches out the water conservancy diversion chamber and towards the catalyst in the denitration tower, the air duct is divided into first air duct group and second air duct group with the central line of denitration tower as the world, is close to the air duct of intake duct one side is first air duct group, and the air duct that keeps away from intake duct one side is second air duct group, rotates the first air duct group and the second air duct group of connection can make different reactions to high-speed mixed gas and low-speed mixed gas, make no matter low-speed or high-speed mixed gas can all even react with the catalyst.
Description
Technical Field
The invention relates to the technical field of SCR denitration, in particular to a variable inlet flow guiding device and a denitration reactor using the same.
Background
The primary task of improving air quality against haze pollution is currently to control PM2.5 emissions, while organics and nitrates are the most important components of PM2.5, so nitrogen oxide emissions must be drastically reduced.
With the national departure of stricter atmospheric pollutant emission standards, the emission of nitrogen oxides in chemical plants and power plants including cement manufacturers is required to be reduced to 50 milligrams per standard cubic meter, and the denitration efficiency is required to be greatly improved by new standards.
In order to cope with increasingly severe emission standards, various factories generating more nitrogen oxide waste gas begin to adopt an SCR denitration reactor to carry out harmless treatment on nitrogen oxide in the waste gas, so that nitrogen oxide and filled ammonia gas generate harmless nitrogen and water under the action of a catalyst, and the discharged waste gas accords with the environmental protection standard of new national output.
In the present SCR denitration reactor, the mixed gas of ammonia gas and nitrogen oxide waste gas is discharged into the denitration tower from one side of the top end of the denitration tower, in order to make the mixed gas uniformly and fully contact with the catalyst in the denitration tower, see patent 214764550U (comparative document 1) shown in fig. 1 specifically, an internal structure of an SCR denitration system is disclosed, and a fixed flow guide grid and a fixed flow guide plate are arranged in a pipeline connected with the top end or the top end inside the denitration tower to guide the mixed flue gas, so that the internal flow guide grid and the flow guide plate structure of the general conventional SCR denitration reactor are approximately the same as those disclosed in comparative document 1.
The production speed of the nitrogen oxide waste gas in the factory is not fixed, the production speed of the nitrogen oxide waste gas can be changed along with the change of the working efficiency of the factory, so that the speed of the mixed gas entering the denitration tower can be changed, the production speed of the nitrogen oxide waste gas is increased, the speed of the mixed gas can be increased, most of the mixed gas can be flushed to the side far away from the inlet, reacts with the catalyst at the side of the denitration tower, the production speed of the nitrogen oxide waste gas is reduced, most of the mixed gas can react with the catalyst at the side close to the inlet in the denitration tower under the action of gravity, the flow direction of the mixed gas can only be changed approximately by the fixed flow guide grids and the flow guide plates, the speed change of the mixed gas can not be adjusted, the mixed gas with the continuous change of the speed can finally cause uneven wear consumption of the catalyst, the catalyst is easy to block or collapse, and the normal operation of the SCR denitration reactor is affected.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a variable inlet flow guiding device and a denitration reactor using the same.
The technical scheme of the invention is as follows:
the utility model provides a variable entry guiding device, includes one-level guiding unit, one-level guiding unit sets up in denitration top of the tower end and is connected with the intake duct, and it includes the division board, the division board sets up in the inboard below of denitration top of the tower board, forms the water conservancy diversion chamber with the roof between, and the mixed gas can enter into the water conservancy diversion chamber from the intake duct, be provided with a plurality of air ducts of rotating connection on the division board, the upper end of air duct stretches into the water conservancy diversion chamber, and its lower extreme stretches out the water conservancy diversion chamber and towards the catalyst in the denitration tower, the air duct is divided into first air duct group and second air duct group with the central line of denitration tower as the boundary, and the air duct that is close to one side of intake duct is first air duct group, and the air duct that is kept away from one side of intake duct is second air duct group;
further, the air duct is higher than the air duct wall at one side far away from the air inlet duct, so that the air duct is more easily driven by mixed gas blown into the flow guide cavity from the air inlet duct.
Furthermore, the air duct of the first air duct set is arranged at the initial state that the upper end faces one side of the air inlet channel, the lower end faces one side far away from the air inlet channel obliquely downwards, the upper end of the air duct can swing towards the direction far away from the air inlet channel under the blowing of high-speed air flow, the low-speed mixed gas entering the air duct of the first air duct set is guided and split, and the abrasion and aging speed of the catalyst at the side are accelerated due to the long-term reaction of the low-speed mixed gas and the catalyst at the side near the air inlet channel;
further, the air duct initial state of second air duct group is set up to be the upper and lower end and is vertical arranging down, and its upper end can blow down under the high-speed air current and keep away from the intake duct direction and swing, carries out the direction reposition of redundant personnel to the high-speed mixed gas that gets into second air duct group air duct, avoids high-speed mixed gas to react with the catalyst that keeps away from intake duct one side for a long time and leads to this side catalyst wearing and tearing ageing speed to accelerate.
According to the variable inlet flow guiding device, the top plate of the denitration tower is obliquely downwards arranged at one end far away from the air inlet channel, and the isolation plate is parallel to the top plate of the denitration tower, so that the flow guiding cavity forms a space with the same height, and the mixed air entering the isolation cavity can uniformly blow the rotation cylinder connected with the isolation plate in a rotating way.
According to the variable inlet flow guiding device, the spiral air guiding module is arranged in the air guide cylinder and comprises the fixed shaft and the spiral blades, the fixed shaft is vertically arranged at the middle position of the air guide cylinder, the spiral blades are arranged between the fixed shaft and the inner wall of the air guide cylinder around the fixed shaft, the fixed shaft can provide support for the arrangement of the spiral blades, the spiral air channel is formed between the spiral blades and the air guide cylinder, and mixed gas can be fully guided after passing through the spiral air channel, so that the mixed gas can be sprayed out only along the direction of the air guide cylinder.
According to the variable inlet flow guiding device, the air duct holes are formed in the positions, penetrating through the air duct, of the isolation plates, the side walls of the air duct are connected to the inner sides of the air duct holes in a rotating mode through the rotating shafts, the air duct swinging angle of the first air duct group is an angle a, the angle a is 10-30 degrees, the air duct swinging angle of the second air duct group is an angle b, the angle b is 5-15 degrees, and the direction of the air duct penetrating through the air duct holes can be limited through the inclined arrangement of the air duct holes, so that the accurate flow direction control of mixed gas passing through the air duct is achieved.
Further, the thickness of the cylinder wall of the air duct close to one side of the air inlet channel is larger than that of the cylinder wall of the opposite side, the weight of the air duct close to one side of the air inlet channel is larger than that of the cylinder wall of the opposite side, the overlooking projection shape of the air duct hole is identical to the shape of the outer ring of the overlooking section of the air duct, under the limit of the air duct hole, the air duct of the first air duct group is kept in a vertical state when the flow rate of mixed gas is higher, and the air duct of the second air duct group is kept in a vertical state when the flow rate of the mixed gas is lower.
Preferably, the minimum length of the air duct is not less than 40cm, so that the mixed gas can be fully guided after entering the air duct.
According to the variable inlet flow guiding device, the secondary rectifying unit is arranged below the primary flow guiding unit in the denitration tower and comprises the rectifying plate, the rectifying plate is provided with the plurality of rectifying holes, and the rectifying holes are staggered relative to the air guide cylinders of the primary flow guiding unit, so that mixed gas guided by the primary flow guiding unit can be rectified when passing through the secondary rectifying unit, and the flow of the mixed gas contacted with the catalyst is more stable.
Further, the rectifying rotary plate is arranged in the rectifying hole, the shape of the rectifying rotary plate comprises a spiral shape, and the arrangement of the rectifying rotary plate can increase the rectifying effect of the secondary rectifying unit.
Preferably, the rectifying rotating plate in the rectifying hole adopts a design without a main shaft, so that the integral weight of the secondary rectifying unit can be reduced while the rectifying requirement is met.
A denitration reactor comprising a variable inlet baffle device as described above.
The invention has the beneficial effects that:
1. according to the variable inlet flow guiding device and the denitration reactor using the variable inlet flow guiding device, the air guide cylinder of the first-stage flow guiding unit can conduct targeted flow guiding direction change according to the flow velocity of the mixed gas entering the denitration tower, so that the mixed gas is prevented from being flushed with a catalyst at a certain position all the time due to the fact that the flow velocity of the mixed gas is too high or too low, the mixed gas with different flow velocities can be effectively and stably guided correctly, and can be subjected to full and uniform catalytic reaction with the catalyst in the denitration tower, and blocking or collapse of the catalyst due to uneven wear and consumption is avoided;
2. according to the variable inlet flow guiding device and the denitration reactor using the variable inlet flow guiding device, the spiral blades in the air guiding cylinder and the rectifying rotating plate in the rectifying hole can conduct spiral flow guiding and spiral rectifying on the passing mixed gas in a spiral mode, so that the flowing direction of the mixed gas can be completely twisted, and compared with the traditional rotating plate, the variable inlet flow guiding device is more stable and has a better rectifying effect.
Drawings
The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
In the drawings:
fig. 1 is a schematic structural diagram of an SCR denitration system disclosed in comparative document 1;
fig. 2 is a schematic diagram showing the state in the denitration tower when the yield of the nox exhaust gas is low in the embodiment 1;
fig. 3 is a schematic diagram showing the state in the denitration tower when the yield of the nox exhaust gas is large in the embodiment 1;
fig. 4 is a schematic structural diagram of the first duct set in embodiment 1 (the dashed line is a state where the flow rate of the mixed gas is large);
fig. 5 is a schematic structural diagram of the second air duct set in embodiment 1 (the dashed line is the state of large flow rate of the mixed gas);
FIG. 6 is a schematic view showing the internal structure of the air duct in the embodiment 1;
FIG. 7 is a top view of the air duct of example 1;
fig. 8 is a schematic view showing the internal structure of the rectifying hole in the present embodiment 1;
the components represented by the reference numerals in the figures are:
1. a denitration tower; 2. an air inlet channel; 3. a first-stage flow guiding unit; 31. a partition plate; 32. a diversion cavity; 33. a first air duct group; 34. a second air duct group; 35. a spiral wind guide module; 36. a fixed shaft; 37. a helical blade; 38. a duct hole; 4. a secondary rectifying unit; 41. a rectifying plate; 42. a rectifying hole; 43. rectifying rotating plates; 5. a catalyst.
Detailed Description
Example 1
Referring to fig. 2-8, a variable inlet flow guiding device comprises a primary flow guiding unit 3, wherein the primary flow guiding unit 3 is arranged at the top end of a denitration tower 1 and is connected with an air inlet channel 2, the variable inlet flow guiding device comprises a separation plate 31, the separation plate 31 is arranged below the inner side of a top plate of the denitration tower 1, a flow guiding cavity 32 is formed between the separation plate and the top plate, mixed gas can enter the flow guiding cavity 32 from the air inlet channel 2, a plurality of air guide cylinders which are connected in a rotating manner are arranged on the separation plate 31, the upper ends of the air guide cylinders extend into the flow guiding cavity 32, the lower ends of the air guide cylinders extend out of the flow guiding cavity 32 and face a catalyst 5 in the denitration tower 1, the air guide cylinders are divided into a first air guide cylinder group 33 and a second air guide cylinder group 34 by taking the central line of the denitration tower 1 as a boundary, the air guide cylinder close to one side of the air inlet channel 2 is the first air guide cylinder group 33, and the air guide cylinder far away from one side of the air inlet channel 2 is the second air guide cylinder group 34.
Further, referring to fig. 4-6, the partition plate 31 is provided with a duct hole 38 at a position where the duct passes, and can accommodate the duct to swing back and forth in the duct hole 38, the duct side wall is rotatably connected to the inner side of the duct hole 38 through a rotation shaft, the duct swing angle of the first duct group 33 is an angle a, the angle a is 10-30 degrees, the duct swing angle of the second duct group 34 is an angle b, the angle b is 5-15 degrees, and the duct hole 38 is configured to limit the direction of the duct passing therethrough, so as to realize accurate flow direction control of the mixed gas passing through the duct.
Further, referring to fig. 5 and 6, the thickness of the wall of the air duct on the side close to the air inlet channel 2 is greater than that of the wall of the opposite side, the weight of the air duct on the side close to the air inlet channel 2 is greater than that of the wall of the opposite side, the air duct hole 38 for accommodating the air duct of the first air duct group 33 is relatively towards the inclined angle a on the side close to the air inlet channel with respect to the direction of gravity, the air duct hole 38 for accommodating the air duct of the second air duct group 34 is relatively towards the inclined angle b on the side far away from the air inlet channel with respect to the direction of gravity, the top projection shape of the air duct hole 38 is the same as the shape of the outer ring of the top cross section of the air duct, under the limit of the air duct hole 38, the air duct of the first air duct group 33 can keep the lower end of the air duct group 33 obliquely downwards towards the side far away from the air inlet channel 2 when the flow rate of the mixed gas is low, and keep the vertical state when the flow rate of the mixed gas is high, and the air duct of the second air duct group 35 can keep the lower end of the air duct obliquely downwards towards the side close to the air inlet channel 2 when the flow rate of the mixed gas is high.
Preferably, the height of the cylinder wall of the air duct far away from one side of the air inlet duct is higher than that of the cylinder wall of the opposite side, so that the air duct is more easily driven by the mixed gas blown into the flow guiding cavity 32 from the air inlet duct 2 to swing and deflect.
Referring to fig. 4, in the initial state of the first air duct set 33, the upper end is set towards the air inlet 2 side, the lower end is inclined downwards towards the side far away from the air inlet 2 side, the upper end can swing towards the side far away from the air inlet 2 side under the blowing of high-speed air flow, when the flow rate of the mixed gas entering the air inlet 2 into the air outlet 1 is not high, under the action of gravity, most of the low-speed mixed gas enters the first air duct set 33, the low-speed mixed gas is guided by the first air duct set 33 towards the side far away from the air inlet 2 side, the low-speed mixed gas is prevented from long-term reacting with the catalyst 5 near the air inlet 2 side in the air outlet 1, so that the abrasion consumption of the catalyst 5 is accelerated, when the output of nitrogen oxide waste gas is increased, the mixed gas can be blown from the air inlet 2 side far away from the air inlet 2 side in the air outlet 1, at the moment, the air flow in the mixed gas in the flow guiding cavity 32 can blow the upper end of the first air duct set 33, so that the lower end of the air duct of the first air duct set 33 can rotate towards the side near 2, the side near the air inlet 2 side is guided by the first air duct set 33, the long-term reacting with the catalyst 5 near the high-speed mixed gas side near the air inlet 2 side, so that the catalyst 5 is prevented from being far away from the long-term wearing and accelerating catalyst 5 side.
Referring to fig. 5, the air duct of the second air duct set 34 is vertically disposed at the initial state of the air duct set, the upper end of the air duct set can swing towards the direction far away from the air duct 2 under the blowing of high-speed air flow, when the flow rate of the mixed gas entering the denitration tower 1 from the air duct 2 is not high, a small amount of the mixed gas flowing to the position of the second air duct set 34 in the air duct set 32 can enter the air duct of the second air duct set 34, under the action of the second air duct set 34, the mixed gas is catalytically reacted with the catalyst 5 under the action of the second air duct set 34, when the flow rate of the mixed gas is increased, the mixed gas flowing to a large amount of flow rate blocks at the position of the second air duct set 34 in the air duct set 32 can blow the upper end of the air duct set 34 from the air duct set, so that the upper end of the air duct set 34 rotates towards the side far away from the air duct 2, and the lower end of the air duct set 34 is driven to rotate towards the side close to the air duct 2, after the mixed gas entering the second air duct set 34, the high-speed mixed gas enters the air duct set 34, the catalyst 5 under the action of the second air duct set 34 is catalytically acts on the air duct set, the catalyst 5 is prevented from affecting the long-term aging of the catalyst 5 on the side far away from the air duct 2, and the catalyst 5 is greatly worn down on the side of the air duct 2.
Referring to fig. 6, a spiral air guide module 35 is provided in the air duct, the spiral air guide module 35 includes a fixed shaft 36 and a spiral blade 37, the fixed shaft 36 is vertically disposed at the middle position of the air duct, the spiral blade 37 is disposed between the fixed shaft 36 and the inner wall of the air duct around the fixed shaft 36, the fixed shaft 36 can provide support for the arrangement of the spiral blade 37, the flow velocity of the mixed gas initially entering the desulfurizing tower is fast, the pressure of the spiral blade 37 in the air duct is also relatively high, the fixed shaft 36 is provided to increase the structural strength of the spiral blade 37, the spiral blade 37 is prevented from being blown out by the mixed gas, a spiral air duct is formed between the spiral blade 37 and the air duct, the mixed gas can be sufficiently guided to be sprayed out along the direction of the air duct, so that the mixed gas can flow direction is accurately controlled, the flow guiding effect is stronger than that of a Shan Luoxuan type air duct, the flow guiding device of the common swirl plate on the market can further control the flow direction of the mixed gas, so that the mixed gas can more uniformly contact with the catalyst 5, and the service life of the catalyst 5 is prevented from being influenced by uneven wear.
Preferably, the denitration tower is cuboid, its cross-section is rectangular, so its roof is the rectangle flat board, the roof of denitration tower 1 keeps away from 2 one end slope downward setting of intake duct, and this just makes the mixed gas after getting into in the water conservancy diversion chamber 32, under the water conservancy diversion of roof, can blow down in the slant, in order to make the air mixture that enters into in the isolation chamber can be even blow the baffle 31 on rotate the air duct of connection, the baffle 31 is on a parallel with the roof setting of denitration tower 1 to make water conservancy diversion chamber 32 form the space of equiheight, let the air mixture that enters into in the isolation chamber can be even blow the rotating cylinder of rotating connection on the baffle 31, make the air duct more accurate even stability to the water conservancy diversion of mixed gas.
Preferably, the minimum length of the air duct is not less than 40cm, so that the mixed gas can be fully guided after entering the air duct, and the flow direction of the mixed gas is fully twisted, thereby ensuring that the air duct can have a sufficient guiding effect.
Referring to fig. 2, 3 and 7, a secondary rectifying unit 4 is disposed below the primary flow guiding unit 3 in the denitration tower, the secondary rectifying unit 4 includes a rectifying plate 41, the rectifying plate 41 is horizontally and fixedly disposed below the primary flow guiding unit 3 in the denitration tower 1, and above the uppermost catalyst 5, a plurality of rectifying holes 42 are disposed on the rectifying plate 41, and the rectifying holes 42 are staggered with respect to the air duct of the primary flow guiding unit 3, so that when the mixed gas guided by the primary flow guiding unit 3 passes through the secondary rectifying unit 4, the mixed gas contacted with the catalyst 5 can be rectified, the flow of the mixed gas is more stable, the mixed gas is ensured to be contacted with the catalyst 5 stably and uniformly, and phenomena such as blocking or collapse of the catalyst 5 due to uneven wear reaction are further prevented.
Further, the rectifying rotating plate 43 is arranged in the rectifying hole 42, the shape of the rectifying rotating plate 43 comprises a spiral shape, the rectifying effect of the secondary rectifying unit 4 can be increased due to the arrangement of the rectifying rotating plate 43, the mixed gas after being subjected to spiral rectification through the rectifying rotating plate 43 flows more uniformly and can fully react with the catalyst 5 arranged below the secondary rectifying unit 4, and the treatment efficiency of nitrogen oxides in the mixed gas is improved.
Preferably, the rotation direction of the rectifying rotating plate 43 is opposite to the rotation direction of the helical blade 37 in the air duct, so as to further improve the uniformity of the mixed gas in the denitration tower 1.
Preferably, because the flow velocity of the mixed gas is reduced after passing through the primary flow guiding unit 3, the impact force is reduced, and the rectifying rotating plate 43 in the rectifying hole 42 adopts a design without a main shaft, so that the integral weight of the secondary rectifying unit 4 can be reduced while the rectifying requirement is met, and the manufacturing cost of the secondary rectifying unit 4 can be reduced to a certain extent.
A denitration reactor comprising a variable inlet baffle device as described above.
Claims (7)
1. The utility model provides a variable entry guiding device, its characterized in that includes one-level guiding unit (3), one-level guiding unit (3) sets up on denitration tower (1) top and is connected with intake duct (2), and it includes division board (31), division board (31) set up in denitration tower (1) roof inboard below, form water conservancy diversion chamber (32) with between the roof, be provided with a plurality of air ducts that rotate and connect on division board (31), the upper end of air duct stretches into water conservancy diversion chamber (32), and its lower extreme stretches out water conservancy diversion chamber (32) and towards catalyst (5) in denitration tower (1), and a plurality of air ducts divide into first air duct group (33) and second air duct group (34) with the central line of denitration tower (1) as the boundary, be close to first air duct group (33) of intake duct (2) one side, be far away from second air duct group (34) of intake duct (2) one side;
the top plate of the denitration tower (1) is arranged obliquely downwards at one end far away from the air inlet channel (2), and the isolation plate (31) is arranged parallel to the top plate of the denitration tower (1), so that the diversion cavity (32) forms a space with the same height;
the air duct is characterized in that an air duct hole (38) is formed in the position, through which the air duct passes, of the isolation plate (31), the side wall of the air duct is rotationally connected to the inner side of the air duct hole (38) through a rotating shaft, the air duct swinging angle of the first air duct group (33) is an angle a, the angle a is 10-30 degrees, the air duct swinging angle of the second air duct group (34) is an angle b, and the angle b is 5-15 degrees;
the height of the cylinder wall of the air duct, which is far away from one side of the air inlet duct, is higher than that of the cylinder wall of the opposite side;
the thickness of the cylinder wall of the air duct close to one side of the air inlet channel (2) is larger than that of the cylinder wall of the opposite side, the weight of the air duct close to one side of the air inlet channel (2) is larger than that of the cylinder wall of the opposite side, and the overlooking projection shape of the air duct hole (38) is the same as the shape of the outer ring of the overlooking section of the air duct;
the air duct of the first air duct set (33) is arranged at the initial state that the upper end faces one side of the air inlet channel (2), the lower end faces one side far away from the air inlet channel (2) obliquely downwards, and the upper end can swing towards the direction far away from the air inlet channel (2) under the blowing of high-speed air flow;
the air duct of the second air duct set (34) is arranged vertically at the initial state, and the upper end of the air duct is capable of swinging towards the direction far away from the air inlet channel (2) under the blowing of high-speed air flow.
2. A variable inlet guide device according to claim 1, characterized in that a spiral air guide module (35) is arranged in the air guide cylinder, the spiral air guide module (35) comprises a fixed shaft (36) and spiral blades (37), the fixed shaft (36) is vertically arranged in the middle of the air guide cylinder, and the spiral blades (37) are arranged between the fixed shaft (36) and the inner wall of the air guide cylinder around the fixed shaft (36).
3. A variable inlet guide device according to claim 1, wherein the minimum length of the air duct is not less than 40cm.
4. A variable inlet guide device according to claim 1, characterized in that a secondary rectifying unit (4) is arranged below the primary guide unit (3) in the denitration tower, the secondary rectifying unit (4) comprises a rectifying plate (41), a plurality of rectifying holes (42) are formed in the rectifying plate (41), and the rectifying holes (42) are staggered relative to the air duct of the primary guide unit (3).
5. A variable inlet guide according to claim 4, characterized in that a rectifying vane (43) is arranged in the rectifying bore (42), the shape of the rectifying vane (43) comprising a spiral.
6. A variable inlet guide according to claim 5, characterized in that the rectifying rotor (43) in the rectifying bore (42) is of a non-main shaft design.
7. A denitration reactor comprising a variable inlet flow device as claimed in any one of claims 1 to 6.
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| CN202211357829.8A CN115646187B (en) | 2022-11-01 | 2022-11-01 | Variable inlet flow guiding device and denitration reactor using same |
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| CN202211357829.8A CN115646187B (en) | 2022-11-01 | 2022-11-01 | Variable inlet flow guiding device and denitration reactor using same |
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| CN115646187B true CN115646187B (en) | 2023-07-21 |
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| CN2827538Y (en) * | 2005-09-29 | 2006-10-18 | 宝山钢铁股份有限公司 | Air damper |
| CN209049193U (en) * | 2018-09-27 | 2019-07-02 | 衢州佰强新材料科技有限公司 | Steam-heated white plume governing system is condensed again based on fluorine plastic-steel |
| CN210079241U (en) * | 2019-03-11 | 2020-02-18 | 山东净清环境工程有限公司 | Flow guide equipment of inlet flue of desulfurizing tower |
| CN210410218U (en) * | 2019-07-22 | 2020-04-28 | 重庆工商大学环境保护研究所 | UV photolysis equipment for VOCs treatment |
| CN111408270A (en) * | 2020-05-06 | 2020-07-14 | 宿州冬宇环保科技有限公司 | SCR denitration system |
| CN111569647B (en) * | 2020-05-14 | 2024-04-26 | 华电电力科学研究院有限公司 | SCR denitration inlet flow field adjusting device and control method thereof |
| CN213790875U (en) * | 2020-10-31 | 2021-07-27 | 李通 | SCR denitration reactor entry flue gas water conservancy diversion subassembly |
| CN113815834A (en) * | 2021-10-08 | 2021-12-21 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Marine air conditioner air distributor with helical blades |
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