A denitration system for a 100mw grade combined cycle unit

Abstract

The application is suitable for the technical field of flue gas treatment, and provides a denitration system for a 100MW grade combined cycle unit, which comprises a mixed conveying part connected with a flue gas discharging pipe of the combined cycle unit; a plurality of denitration assemblies are uniformly and fixedly installed on the mixed conveying part; the denitration assembly comprises a fixing frame, a swing part rotatably arranged on the fixing frame, and a rotating part rotatably arranged in the swing part; a plate type denitration catalyst is slidably arranged in the rotating part; the plate type denitration catalyst comprises three groups of denitration catalyst blocks arranged on the same axis; the device changes the positions of the three groups of denitration catalyst blocks in sequence through linkage cooperation between the components, not only ensures the full contact of the denitration catalyst blocks at the front and back ends of the plate type denitration catalyst with the flue gas, but also ensures the full contact of the denitration catalyst blocks at the middle position with the flue gas, improves the utilization rate of the plate type denitration catalyst, and reduces waste.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas treatment, more particularly, it relates to a denitration system for 100MW level combined cycle unit. BACKGROUND

[0002] The 100MW combined cycle steam turbine is matched with the 270MW heavy-duty gas turbine to realize gas-steam combined cycle unit, and belongs to two-cylinder two-exhaust, reheat, multi-pressure and condensing type steam turbine. The high and medium pressure adopts combined cylinder structure, the high pressure cylinder is 7 stages and the medium pressure cylinder is 7 stages, which are impulse type design; the low pressure is symmetrical counterflow type, 7 stages in positive and 7 stages in reverse, which are reaction type design.

[0003] The high-temperature industrial flue gas generated by the combined cycle unit needs to be denitrated. According to the search, the patent number CN111773833B discloses a dust removal and denitration method. When the contact end of the denitration catalyst first contacted with the flue gas gradually reduces the denitration coefficient, two corrugated expansion pipes are respectively detached from the transmission end and the input end, then through the cooperation of the T-shaped shaft slot and the T-shaped shaft rotation, the square shell is rotated by 180°, thereby turning over the denitration catalyst, so that the other end becomes the first contact end with the flue gas, thereby improving the utilization rate of the denitration catalyst without directly replacing the new catalyst, and reducing waste.

[0004] However, in the above-mentioned denitration method, the displacement process of the denitration catalyst needs to be manually disassembled, which is low in work efficiency. At the same time, by rotating the denitration catalyst to exchange the positions of the first and last ends, the two ends of the denitration catalyst contacted with the flue gas are fully utilized, but the utilization rate of the denitration catalyst in the middle position is difficult to control. SUMMARY

[0005] In view of the deficiencies in the prior art, the purpose of the present application is to provide a denitration system for 100MW level combined cycle unit. Through the linkage cooperation between the components, the positions of the three groups of denitration catalyst blocks are changed in turn, not only ensuring the full contact of the denitration catalyst blocks at the front and back ends of the plate-type denitration catalyst with the flue gas, but also ensuring the full contact of the denitration catalyst blocks at the middle position with the flue gas, thereby improving the utilization rate of the plate-type denitration catalyst and reducing waste.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] The application discloses a denitration system for a 100MW grade combined cycle unit, which comprises a mixed conveying part connected with a smoke exhaust pipe of the combined cycle unit; a plurality of denitration components are uniformly and fixedly arranged on the mixed conveying part; the denitration component comprises a fixing frame, a swing part rotatably arranged on the fixing frame and a rotating part rotatably arranged in the swing part; a plate type denitration catalyst is slidably arranged in the rotating part; a pressing part is slidably arranged on the top of the rotating part; the swing part comprises a fixed shell; an air inlet pipe, a storage pipe, an air outlet pipe and a feeding pipe are uniformly and sequentially arranged on the outer circumferential side of the fixed shell; the air inlet pipe and the air outlet pipe are coaxially arranged; the storage pipe and the feeding pipe are coaxially arranged; an annular cavity is formed in the inner circumferential side of the fixed shell; the rotating part comprises a rotating plate rotatably arranged in the annular cavity; a placing cavity matched with the plate type denitration catalyst is formed in the rotating plate; the plate type denitration catalyst comprises three groups of denitration catalyst blocks coaxially arranged.

[0008] The application further discloses that the mixed conveying part comprises a mixing box; an air inlet cylinder fixedly and communicatively connected with the smoke exhaust pipe of the combined cycle unit is arranged on the top of the mixing box; a plurality of air outlet pipes are uniformly and communicatively arranged on the circumferential side of the air inlet cylinder; a plurality of branch pipes are uniformly and communicatively arranged on the outer circumferential side of the mixing box; the branch pipes and the air outlet pipes are connected through high-temperature-resistant connecting hoses; ammonia gas conveying pipes are uniformly and communicatively arranged on the outer circumferential side of the mixing box.

[0009] The application further discloses that an inner vertical pipe is communicatively arranged on the bottom of the mixing box; an outer vertical pipe coaxial with the inner vertical pipe is arranged on the outer circumferential side of the inner vertical pipe; a gas conveying cavity is formed between the inner vertical pipe and the outer vertical pipe; a plurality of filtering holes are uniformly formed in the circumferential side of the inner vertical pipe; an installation base plate is fixedly arranged on the bottom of the gas conveying cavity; a transfer box is fixedly and tightly arranged on the bottom of the installation base plate through fastening bolts; a plurality of plug-in pipes are uniformly and communicatively arranged on the top of the transfer box; a plurality of plug-in holes matched with the plug-in pipes are uniformly formed in the inner bottom surface of the gas conveying cavity; a plurality of connecting pipes are uniformly and communicatively arranged on the circumferential side of the transfer box; the connecting pipes and the corresponding air inlet pipes are fixedly connected through connecting flanges.

[0010] The application further discloses that a reciprocating screw rod extending into the inner vertical pipe is rotatably arranged through the inner bottom surface of the mixing box; an impeller is fixedly arranged on the top end of the circumferential side of the reciprocating screw rod; a plurality of sliding rods are symmetrically fixed on the bottom of the mixing box; a sliding sleeve matched with the reciprocating screw rod is arranged on the reciprocating screw rod; a plurality of lifting plates matched with the sliding rods are symmetrically fixed on the circumferential side of the sliding sleeve; a lifting ring coaxial with the reciprocating screw rod is fixed between the end portions of the two lifting plates; a plurality of bristles are uniformly arranged on the outer circumferential side of the lifting ring; a square column is fixed on the bottom end of the reciprocating screw rod; a connecting shaft is rotatably arranged through the top of the transfer box; a square groove matched with the square column is formed in the top end of the connecting shaft; a stirring shaft is fixed on the bottom end of the connecting shaft; a plurality of stirring rods are uniformly fixed on the circumferential side of the stirring shaft.

[0011] The application is further provided with the following arrangement: the fixing frame comprises a U-shaped seat; the U-shaped seat is fixed with a collar at both ends; the air inlet pipe and the air outlet pipe are both provided with an annular groove on the outer circumferential side, which is in rotational cooperation with the collar; the U-shaped seat is fixed with an L-shaped plate on the side; the L-shaped plate is fixed with a support ring at the end; the support ring is fixed with a mounting pipe on the inner wall; the mounting pipe is fixedly connected with the connecting pipe through a connecting flange at one end; the mounting pipe is fixed with a high-temperature-resistant conveying hose at the other end; the high-temperature-resistant conveying hose is fixedly connected with the air inlet pipe through a connecting flange at one end.

[0012] The application is further provided with the following arrangement: the U-shaped seat is fixed with a U-shaped plate on the inner bottom surface; the U-shaped seat is fixed with an arc-shaped pipe coaxial with the air inlet pipe on the side; the receiving pipe is provided with an extension pipe at the end; the extension pipe is fixed with a first arc-shaped rod in sliding cooperation with the arc-shaped pipe on the circumferential side; the first arc-shaped rod and the inner bottom surface of the arc-shaped pipe are fixed with an arc-shaped spring; the inner top of the U-shaped plate is fixedly installed with a first electromagnetic suction disc; the U-shaped plate is provided with a sliding groove on the inner wall on both sides; the sliding groove is fixed with a guide rod between the inner walls; a lifting strip is slidingly arranged between the two guide rods; the lifting strip is fixed with a first iron block at the top; the U-shaped seat is provided with a guide rope pipe penetrating through and communicating with the arc-shaped pipe; the first arc-shaped rod is connected with the connecting rope penetrating through the guide rope pipe between the bottom end and the bottom surface of the lifting strip.

[0013] The application is further provided with the following arrangement: the air inlet pipe and the air outlet pipe are both fixed with a support plate on the outer circumferential side; the support plate is fixed with a second arc-shaped rod coaxial with the air inlet pipe on the side; the second arc-shaped rod is fixed with a squeeze ball at the end; the collar is fixed with an extension plate on the circumferential side; the extension plate is fixed with a ball seat adapted to the squeeze ball at the end; the ball seat is provided with an elastic air bag at the top end, and a first air guide pipe is provided at the bottom; the outer circumferential side of the rotating plate is provided with a first annular sealing groove at both ends of the placement cavity; the inner circumferential side of the annular cavity is provided with a second annular sealing groove coaxial with the air inlet pipe; the second annular sealing groove is provided with an elastic diaphragm at the end; the second annular sealing groove is provided with a second air guide pipe penetrating through the inner wall; the first air guide pipe and the second air guide pipe are connected through a hose.

[0014] The application is further provided with: the top of the fixed shell is sequentially provided with a microcontroller, a warning light and an alarm; the top of the fixed shell is provided with a support plate; the top of the support plate is provided with a micro motor; the output end of the micro motor is fixedly provided with a gear; the top of the rotating plate is fixedly provided with a gear ring engaged with the gear; the inside of the gas outlet pipe is provided with a nitrogen oxide flue gas monitor; the compression part comprises a connecting plate; the side surface of the connecting plate is symmetrically fixedly provided with an ear plate; the support spring is fixed between the ear plate and the top of the rotating plate; the side surface of the connecting plate between the two ear plates is fixedly provided with a fixed plate; the ground of the fixed plate is fixedly provided with a second electromagnetic suction disc; the top of the rotating plate is fixedly provided with a second iron block; the bottom surface of the connecting plate is uniformly fixedly provided with a plurality of vertical rods; the end of the vertical rod is fixedly provided with a piston plate; the bottom of the piston plate is fixedly provided with a pressing block; the inside top of the rotating plate is uniformly provided with a plurality of piston cavities in sliding cooperation with the piston plate; the inside top of the piston cavity is provided with a sliding hole in sliding cooperation with the vertical rod; the inside circumferential surface of the feeding pipe, the placing cavity and the receiving pipe is provided with a guide groove; the outside circumferential surface of the denitration catalyst block is fixedly provided with a sliding block in sliding cooperation with the guide groove, and the outside circumferential surface thereof is provided with an insertion slot in insertion cooperation with the pressing block.

[0015] The application is further provided with: the inside of the extension pipe is fixedly provided with an electromagnetic coil; the inside of the extension pipe is slidingly provided with a jackscrew; the jackscrew and the extension pipe are fixedly provided with a return spring; one end of the jackscrew is fixedly provided with a connecting column; the end of the connecting column is fixedly provided with an armature column; the input end of the microcontroller is electrically connected with the nitrogen oxide flue gas monitor, and the output end thereof is electrically connected with the micro motor, the first electromagnetic suction disc, the second electromagnetic suction disc, the electromagnetic coil, the warning light and the alarm; the end of the extension pipe is fixedly provided with an ear seat; the side surface of the ear seat is penetratingly provided with a threaded sleeve; the inside of the threaded sleeve is threadedly rotatably provided with a top rod penetratingly sliding in the receiving pipe.

[0016] The application has the following advantages:

[0017] 1. The flue gas and ammonia gas are respectively sent into the mixing box through the corresponding branch pipes and ammonia gas conveying pipes, are further mixed in the transfer box after preliminary mixing, and are then sent into the corresponding denitration assemblies through the groups of connecting pipes to react with the plate-type denitration catalyst, thereby improving the flue gas denitration efficiency and denitration effect.

[0018] 2. The position of the three groups of denitration catalyst blocks is sequentially changed through the linkage cooperation between the components, thereby not only ensuring the full contact of the denitration catalyst blocks at the front and back ends of the plate-type denitration catalyst with the flue gas, but also ensuring the full contact of the denitration catalyst block at the middle position with the flue gas, thereby improving the utilization rate of the plate-type denitration catalyst to reduce waste, and improving the work efficiency due to the high automation degree of the replacement process of the denitration catalyst blocks. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of a 100MW level combined cycle unit denitration system of the present application.

[0020] Figure 2 It is a structure schematic view of a mixed conveying part of the present application.

[0021] Figure 3 It is a structure schematic view of a mixed conveying part of the present application.

[0022] Figure 4 It is a structure schematic view of a mixed conveying part of the present application. Figure 3 It is an enlarged view of A area of the mixed conveying part.

[0023] Figure 5 It is a structure schematic view of a denitration assembly of the present application.

[0024] Figure 6 It is a structure schematic view of a denitration assembly of the present application. Figure 5 It is an enlarged view of B area of the denitration assembly.

[0025] Figure 7 It is a structure schematic view of a denitration assembly of the present application.

[0026] Figure 8 It is a structure schematic view of a fixed frame of the present application.

[0027] Figure 9 It is a structure schematic view of a swing part of the present application.

[0028] Figure 10 It is a structure schematic view of a rotating part of the present application.

[0029] Figure 11 It is a structure schematic view of a plate type denitration catalyst of the present application.

[0030] Figure 12 It is a structure schematic view of a pressing part of the present application.

[0031] Figure 13 It is a structure schematic view of a top column of the present application.

[0032] Figure 14 It is a structure schematic view of a denitration catalyst block position replacement process of the present application.

[0033] Figure 15 It is a structure schematic view of a denitration catalyst block position replacement process of the present application.

[0034] Fig. 1: 1, mixed conveying part; 2, denitration assembly; 3, fixed frame; 4, swing part; 5, rotating part; 6, plate type denitration catalyst; 7, compression part; 8, fixed shell; 9, air inlet pipe; 10, storage pipe; 11, air outlet pipe; 12, feeding pipe; 13, annular cavity; 14, rotating plate; 15, placing cavity; 16, denitration catalyst block; 17, mixing box; 18, air outlet pipe; 19, branch pipe; 20, ammonia gas conveying pipe; 21, inner vertical pipe; 22, outer vertical pipe; 23, gas conveying cavity; 24, filter hole; 25, mounting bottom plate; 26, transfer box; 27, plug-in pipe; 28, plug-in hole; 29, connecting pipe; 30, reciprocating screw rod; 31, sliding rod; 32, sliding sleeve; 33, lifting plate; 34, lifting ring; 35, brush; 36, square column; 37, connecting shaft; 38, square groove; 39, stirring shaft; 40, stirring rod; 41, U-shaped seat; 42, collar; 43, annular groove; 44, L-shaped plate; 45, supporting ring; 46, mounting pipe; 47, high-temperature-resistant conveying hose; 48, U-shaped plate; 49, arc-shaped pipe; 50, extension pipe; 51, first arc-shaped rod; 52, arc-shaped spring; 53, first electromagnetic chuck; 54, chute; 55, guide rod; 56, first iron block; 57, guide rope pipe; 58, connecting rope; 59, support plate; 60, second arc-shaped rod; 61, extrusion ball; 62, extension plate; 63, ball seat; 64, elastic air bag; 65, first air guide pipe; 66, first annular sealing groove; 67, second annular sealing groove; 68, second air guide pipe; 69, microcontroller; 70, warning light; 71, support plate; 72, micro motor; 73, gear; 74, gear ring; 75, connecting plate; 76, ear plate; 77, supporting spring; 78, fixed plate; 79, second electromagnetic chuck; 80, second iron block; 81, vertical rod; 82, piston plate; 83, pressing block; 84, piston cavity; 85, sliding hole; 86, guide groove; 87, sliding block; 88, insertion slot; 89, electromagnetic coil; 90, jacking post; 91, return spring; 92, connecting post; 93, armature post; 94, air inlet cylinder; 95, lifting bar; 96, siren; 97, ear seat; 98, threaded sleeve; 99, jacking rod. DETAILED DESCRIPTION

[0035] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs, unless otherwise specified.

[0037] In the present application, the orientation such as "upper, lower" is generally directed to the direction shown in the drawings or the vertical, perpendicular or gravity direction unless otherwise stated; similarly, for the convenience of understanding and description, "left, right" is generally directed to the left and right shown in the drawings; "inner, outer" refers to the inner and outer relative to the contour of each component, but the above orientation words are not used to limit the present application.

[0038] Embodiment one, please refer to Figures 1-15 The present application provides the following technical solutions:

[0039] A kind of 100MW level combined cycle unit is with denitration system, specifically, including the mixed delivery part 1 connected with combined cycle unit exhaust pipe;Several denitration components 2 are uniformly fixed and installed on mixed delivery part 1;Denitration component 2 includes fixed frame 3, swing part 4 rotationally arranged on fixed frame 3 and rotation part 5 rotationally arranged inside swing part 4;Plate type denitration catalyst 6 is slidably arranged in rotation part 5;Compression part 7 is slidably arranged on the top of rotation part 5;Swing part 4 includes fixed shell 8;Air inlet pipe 9, storage pipe 10, exhaust pipe 11 and feeding pipe 12 are sequentially and uniformly communicated on the outer circumferential side of fixed shell 8;Air inlet pipe 9 and exhaust pipe 11 are coaxially arranged;Storage pipe 10 and feeding pipe 12 are coaxially arranged;Annular cavity 13 is formed on the inner circumferential side of fixed shell 8;Rotating plate 14 is rotationally arranged in annular cavity 13;Placement cavity 15 adapted to plate type denitration catalyst 6 is formed in rotating plate 14;Plate type denitration catalyst 6 includes three groups of denitration catalyst blocks 16 arranged coaxially.

[0040] The working principle of the present embodiment is as follows:

[0041] The denitration catalyst block 16 takes a stainless steel metal plate as a substrate, adheres a mixture of TiO2, V2O5, etc. on the stainless steel mesh, and after pressing and calcining, the three groups of denitration catalyst blocks 16 are coaxially placed together to form the plate type denitration catalyst 6, which facilitates the replacement of the positions of the three groups of denitration catalyst blocks 16.

[0042] After the flue gas and ammonia gas are sent into the mixed delivery part 1 for sufficient mixing, they are sent into the denitration component 2 to remove nitrogen oxides in the flue gas together with the plate type denitration catalyst 6, and the denitration operation is performed on the flue gas; through the linkage cooperation between the components, the positions of the three groups of denitration catalyst blocks 16 are changed in turn, which not only ensures the sufficient contact of the denitration catalyst blocks 16 at the front and rear ends of the plate type denitration catalyst 6 with the flue gas, but also ensures the sufficient contact of the denitration catalyst block 16 at the middle position with the flue gas, thereby improving the utilization rate of the plate type denitration catalyst 6 and reducing waste.

[0043] Embodiment two, please refer to Figures 1-15The second embodiment is improved on the basis of the first embodiment, and specifically, the mixing conveying part 1 comprises a mixing box 17; the top of the mixing box 17 is fixedly connected with an air inlet cylinder 94 which is in communication with the exhaust pipe of the combined cycle unit; a plurality of air outlet pipes 18 are uniformly arranged on the side surface of the air inlet cylinder 94; a plurality of branch pipes 19 are uniformly and obliquely arranged on the outer side surface of the mixing box 17; the branch pipes 19 and the air outlet pipes 18 are connected through high-temperature-resistant connecting hoses; and a plurality of ammonia gas conveying pipes 20 are uniformly and obliquely arranged on the outer side surface of the mixing box 17.

[0044] The bottom of the mixing box 17 is connected with an inner vertical pipe 21; the outer side surface of the inner vertical pipe 21 is provided with a coaxial outer vertical pipe 22; a gas conveying cavity 23 is formed between the inner vertical pipe 21 and the outer vertical pipe 22; a plurality of filter holes 24 are uniformly arranged on the side surface of the inner vertical pipe 21; the bottom of the gas conveying cavity 23 is fixedly connected with a mounting bottom plate 25; the bottom of the mounting bottom plate 25 is fixedly connected with a transfer box 26 through fastening bolts; the top of the transfer box 26 is uniformly and through-connected with a plurality of plug-in pipes 27; a plurality of plug-in holes 28 which are in plug-in cooperation with the plug-in pipes 27 are uniformly arranged on the inner bottom surface of the gas conveying cavity 23; and a plurality of connecting pipes 29 are uniformly arranged on the side surface of the transfer box 26 and are fixedly connected with the corresponding air inlet pipes 9 through connecting flanges.

[0045] The inner bottom surface of the mixing box 17 is through-rotatably provided with a reciprocating screw rod 30 which extends into the inner vertical pipe 21; a plurality of impellers are fixedly arranged on the side surface of the reciprocating screw rod 30 close to the top end thereof; the bottom of the mixing box 17 is symmetrically fixedly connected with slide rods 31; the reciprocating screw rod 30 is provided with a sliding sleeve 32 which is matched therewith; the side surface of the sliding sleeve 32 is symmetrically fixedly connected with lifting plates 33 which are in sliding cooperation with the slide rods 31; the ends of the two lifting plates 33 are fixedly connected with a lifting ring 34 which is coaxial with the reciprocating screw rod 30; a plurality of brush hairs 35 are uniformly arranged on the outer side surface of the lifting ring 34; the bottom end of the reciprocating screw rod 30 is fixedly connected with a square column 36; the top end of a connecting shaft 37 which is through-rotatably arranged on the top of the transfer box 26 is provided with a square groove 38 which is in plug-in cooperation with the square column 36; the bottom end of the connecting shaft 37 is fixedly connected with a stirring shaft 39; and a plurality of stirring rods 40 are uniformly fixedly arranged on the side surface of the stirring shaft 39.

[0046] The fixed frame 3 comprises a U-shaped seat 41; the two ends of the U-shaped seat 41 are fixedly connected with sleeve rings 42; the outer side surface of the air inlet pipe 9 and the exhaust pipe 11 is uniformly provided with annular grooves 43 which are in rotating cooperation with the sleeve rings 42; the side surface of the U-shaped seat 41 is fixedly connected with an L-shaped plate 44; the end of the L-shaped plate 44 is fixedly connected with a supporting ring 45; the inner wall of the supporting ring 45 is fixedly connected with a mounting pipe 46; one end of the mounting pipe 46 is fixedly connected with the connecting pipe 29 through a connecting flange; the other end of the mounting pipe 46 is fixedly connected with a high-temperature-resistant conveying hose 47; and one end of the high-temperature-resistant conveying hose 47 is fixedly connected with the air inlet pipe 9 through a connecting flange.

[0047] The working principle of the second embodiment is as follows:

[0048] By fixing the intake manifold 94 to the exhaust pipe of the combined cycle unit, the flue gas generated by the combined cycle unit enters the mixing chamber 17 sequentially through the intake manifold 94, the exhaust pipe 18, the high-temperature resistant connecting hose, and the branch pipe 19. Simultaneously, ammonia gas enters the mixing chamber 17 through each set of ammonia gas delivery pipes 20. The flow of ammonia gas and flue gas drives the impeller to rotate, improving the mixing effect and simultaneously driving the reciprocating screw 30 to rotate. The sliding sleeve 32 has a slider 87 adapted to the reciprocating screw 30. The reciprocating screw 30 is a type of three-dimensional cam pair, characterized by two threaded grooves with the same pitch but opposite directions, connected at both ends by a transition curve. The rotation of the reciprocating screw 30 causes the sides of the spiral grooves to push the... The slider 87 in the spiral groove moves axially back and forth, thereby driving the lifting plate 33 to drive the lifting ring 34 to move back and forth along the slide rod 31, thereby driving the brush 35 to clean the inner wall of the inner vertical pipe 21 to prevent the filter hole 24 from being blocked. The mixed gas filtered by the inner vertical pipe 21 enters the gas delivery chamber 23, and then enters the transfer box 26 through the insertion pipe 27. The rotation of the reciprocating screw 30 drives the stirring shaft 39 and the stirring rod 40 to rotate synchronously, further stirring the mixed gas. The mixed gas after being fully stirred and mixed enters the corresponding air inlet pipe 9 through each group of connecting pipes 29, and reacts with the corresponding plate denitrification catalyst 6 in each group of denitrification components 2 to complete the denitrification operation.

[0049] Example 3, please refer to Figures 1-15 This embodiment three is an improvement on embodiment two, specifically, a U-shaped plate 48 is fixed to the inner bottom surface of the U-shaped seat 41; an arc-shaped tube 49 coaxial with the air intake pipe 9 is fixed to the side of the U-shaped seat 41; an extension tube 50 is connected to the end of the receiving tube 10; a first arc-shaped rod 51 that slides with the arc-shaped tube 49 is fixed to the periphery of the extension tube 50; an arc-shaped spring 52 is fixed between the first arc-shaped rod 51 and the inner bottom surface of the arc-shaped tube 49; a first electromagnetic chuck 53 is fixedly installed at the top of the U-shaped plate 48; symmetrical grooves 54 are provided on both sides of the inner wall of the U-shaped plate 48; a guide rod 55 is fixed between the inner walls of the grooves 54; a lifting bar 95 is slidably arranged between the two guide rods 55; a first iron block 56 is fixed to the top of the lifting bar 95; a guide rope tube 57 communicating with the arc-shaped tube 49 is provided through the inner bottom surface of the U-shaped seat 41; a connecting rope 58 passing through the guide rope tube 57 is connected between the bottom end of the first arc-shaped rod 51 and the bottom surface of the lifting bar 95.

[0050] The outer peripheral side of the air inlet pipe 9 and the air outlet pipe 18 is fixed with a support plate 59; the side of the support plate 59 is fixed with a second arc-shaped rod 60 coaxial with the air inlet pipe 9; the end of the second arc-shaped rod 60 is fixed with a squeeze ball 61; the circumferential side of the sleeve ring 42 is fixed with an extension plate 62; the end of the extension plate 62 is fixed with a ball seat 63 matched with the squeeze ball 61; the top end of the ball seat 63 is provided with an elastic air bag 64, and the bottom thereof is provided with a first air guide pipe 65 in communication; the outer peripheral side of the rotating plate 14 is provided with a first annular sealing groove 66 at both ends of the placement cavity 15; the inner peripheral side of the annular cavity 13 is symmetrically provided with a second annular sealing groove 67 coaxial with the air inlet pipe 9; the end of the second annular sealing groove 67 is provided with an elastic diaphragm; the inner wall of the second annular sealing groove 67 is provided with a second air guide pipe 68 in penetration; the first air guide pipe 65 and the second air guide pipe 68 are connected through a hose.

[0051] The top of the fixed shell 8 is sequentially provided with a microcontroller 69, a warning light 70 and an alarm 96; the top of the fixed shell 8 is provided with a support plate 71; the top of the support plate 71 is provided with a micro motor 72; the output end of the micro motor 72 is fixed with a gear 73; the top of the rotating plate 14 is fixedly provided with a gear ring 74 engaged with the gear 73; the inside of the air outlet pipe 18 is provided with a nitrogen oxide flue gas monitor.

[0052] The pressing part 7 comprises a connecting plate 75; the side of the connecting plate 75 is symmetrically fixed with an ear plate 76; the ear plate 76 and the top of the rotating plate 14 are fixed with a support spring 77; the side of the connecting plate 75 between the two ear plates 76 is fixed with a fixed plate 78; the fixed plate 78 is fixedly installed on the ground with a second electromagnetic suction disc 79; the top of the rotating plate 14 is fixed with a second iron block 80; the bottom surface of the connecting plate 75 is uniformly fixed with a plurality of vertical rods 81; the end of the vertical rod 81 is fixed with a piston plate 82; the bottom of the piston plate 82 is fixed with a pressing block 83; the inside top of the rotating plate 14 is uniformly provided with a plurality of piston cavities 84 slidably matched with the piston plate 82; the inside top of the piston cavity 84 is provided with a sliding hole 85 slidably matched with the vertical rod 81; the inner peripheral side of the feeding pipe 12, the placement cavity 15 and the storage pipe 10 is provided with a guide groove 86; the outer peripheral side of the denitration catalyst block 16 is fixed with a sliding block 87 slidably matched with the guide groove 86, and the outer peripheral side thereof is provided with an insertion slot 88 insertingly matched with the pressing block 83.

[0053] The electromagnetic coil 89 is fixedly installed inside the extension pipe 50; the jacks 90 are slidably arranged inside the extension pipe 50; the return springs 91 are fixed between the jacks 90 and the extension pipe 50; the connecting columns 92 are fixed at one end of the jacks 90; the armature columns 93 are fixed at the end of the connecting columns 92; the input end of the microcontroller 69 is electrically connected with the nitrogen oxide flue gas monitor, and the output end thereof is electrically connected with the micro motor 72, the first electromagnetic chuck 53, the second electromagnetic chuck 79, the electromagnetic coil 89, the warning light 70 and the alarm 96; the lug seat 97 is fixed at the end of the extension pipe 50; the threaded sleeve 98 is arranged through the side of the lug seat 97; the top rod 99 is slidably arranged through the storage pipe 10 in the threaded sleeve 98.

[0054] Principle of the third embodiment:

[0055] The denitration catalyst block 16 in direct contact with the air inlet pipe 9 in the initial state is 16(1), the denitration catalyst block 16 located in the middle position is 16(2), and the denitration catalyst block 16 in direct contact with the air outlet pipe 11 is 16(3); in the initial state, the plate-type denitration catalyst 6 is arranged coaxially with the air inlet pipe 9 and the air outlet pipe 11, and in the direction from the air inlet pipe 9 to the air outlet pipe 11, the three groups of denitration catalyst blocks 16 are arranged in the order of 16(1)→16(2)→16(3).

[0056] The nitrogen oxide content in the flue gas discharged from the air outlet pipe 18 is monitored in real time by the nitrogen oxide flue gas monitor; when the nitrogen oxide flue gas monitor monitors that the nitrogen oxide content in the flue gas is close to the early warning value, the microcontroller 69 controls the warning light 70 to flash and the alarm 96 to alarm, warning the staff; the corresponding microcontroller 69 controls the electromagnetic valve on the air inlet cylinder 94 and the electromagnetic valve on the ammonia gas delivery pipe 20 to be closed, and controls the second electromagnetic chuck 79 to be powered to attract the second iron block 80, so that the supporting spring 77 is stretched, and each group of pressing blocks 83 is pulled out of the corresponding insertion slot 88, thereby releasing the fixing limitation on the plate-type denitration catalyst 6.

[0057] The microcontroller 69 controls the first electromagnetic chuck 53 to be powered to attract the first iron block 56, the first arc-shaped rod 51 is pulled through the connecting rope 58, the arc-shaped spring 52 is compressed, the swinging part 4 is driven to rotate around the sleeve ring 42, so that the feeding pipe 12 is arranged obliquely upward, in this process, the extrusion ball 61 is gradually separated from the ball seat 63, the pressure on the elastic air bag 64 is released, the elastic air bag 64 is elastically reset, and the elastic diaphragm is elastically reset from the first annular sealing groove 66, thereby releasing the sealing connection between the swinging part 4 and the rotating part 5.

[0058] The microcontroller 69 controls the start of the micro motor 72 to drive the gear 73 to rotate, drive the gear ring 74 to rotate, make the rotating part 5 rotate 90°, make the placement cavity 15 rotate to be coaxial with the storage tube 10, 16(3) rotate to be close to the feeding tube 12, 16(1) slide into the storage tube 10, from the direction of the feeding tube 12 to the storage tube 10, the three groups of denitration catalyst blocks 16 are arranged as 16(3)→16(2)→16(1) Figure 14 The microcontroller 69 controls the start of the micro motor 72 to drive the gear ring 74 to continue to rotate reversely by 180°, make 16(2) rotate to be close to the feeding tube 12, 16(2) and 16(3) slide down along the placement cavity 15, at this time, from the direction of the feeding tube 12 to the storage tube 10, Figure 14 The microcontroller 69 controls the start of the micro motor 72 to drive the gear ring 74 to continue to rotate reversely by 180°, make 16(2) rotate to be close to the feeding tube 12, 16(2) and 16(3) slide down along the placement cavity 15, at this time, from the direction of the feeding tube 12 to the storage tube 10, Figure 14 The microcontroller 69 controls the start of the micro motor 72 to drive the gear ring 74 to continue to rotate reversely by 180°, make 16(2) rotate to be close to the feeding tube 12, 16(2) and 16(3) slide down along the placement cavity 15, at this time, from the direction of the feeding tube 12 to the storage tube 10,

[0059] The nitrogen oxide flue gas monitor is used to monitor the content of nitrogen oxide compounds in the exhaust gas in real time. When the nitrogen oxide flue gas monitor monitors that the content of nitrogen oxide compounds in the exhaust gas is close to the early warning value, the above operation is repeated to complete the exchange of the positions of the three groups of denitration catalyst blocks 16. From the direction of the feeding tube 9 to the exhaust tube 11, the three groups of denitration catalyst blocks 16 are arranged as 16(3)→16(1)→16(2).

[0060] After the three groups of denitration catalyst blocks 16 are directly contacted with the mixed gas discharged from the gas inlet pipe 9 and react, the plate denitration catalyst 6 needs to be replaced, the swinging part 4 is controlled to rotate and tilt together with the rotating part 5, the rotating part 5 is controlled to rotate by 90°, so that the placement cavity 15 is coaxially arranged with the receiving pipe 10, the top rod 99 is rotated to sequentially slide into the receiving pipe 10 and the placement cavity 15, the three groups of denitration catalyst blocks 16 are pushed out from the feeding pipe 12, and then new three groups of denitration catalyst blocks 16 are added through the feeding pipe 12.

[0061] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-described embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A denitration system for a 100 MW level combined cycle unit, comprising a mixing conveying part connected with a flue gas duct of the combined cycle unit; characterized in that: a plurality of denitration assemblies are uniformly and fixedly installed on the mixing conveying part; the denitration assembly comprises a fixed frame, a swing part rotatably arranged on the fixed frame, and a rotating part rotatably arranged in the swing part; a plate type denitration catalyst is slidably arranged in the rotating part; and a pressing part is slidably arranged on the top of the rotating part.

2. The denitration system according to claim 1, wherein the swing part comprises a fixed shell; the outer circumferential side of the fixed shell is sequentially and uniformly connected with an air inlet pipe, a storage pipe, an air outlet pipe, and a feeding pipe; the air inlet pipe and the air outlet pipe are coaxially arranged; the storage pipe and the feeding pipe are coaxially arranged; an annular cavity is formed on the inner circumferential side of the fixed shell; the rotating part comprises a rotating plate rotatably arranged in the annular cavity; a placement cavity adapted to the plate type denitration catalyst is formed in the rotating plate; and the plate type denitration catalyst comprises three groups of denitration catalyst blocks coaxially arranged.

3. The denitration system according to claim 1, wherein a U-shaped plate is fixedly arranged on the inner bottom of the U-shaped seat; an arc-shaped pipe coaxial with the air inlet pipe is fixedly arranged on the side of the U-shaped seat; an extension pipe is connected with the end of the storage pipe; a first arc-shaped rod slidably matched with the arc-shaped pipe is fixedly arranged on the circumferential side of the extension pipe; an arc-shaped spring is fixedly arranged between the first arc-shaped rod and the inner bottom of the arc-shaped pipe; a first electromagnetic suction disc is fixedly installed on the inner top of the U-shaped plate; two symmetrical slide grooves are formed on the inner wall of the U-shaped plate; a guide rod is fixedly arranged between the inner walls of the slide grooves; a lifting strip is slidably arranged between the two guide rods; a first iron block is fixedly arranged on the top of the lifting strip; a guide rope pipe is formed through the inner bottom of the U-shaped seat and connected with the arc-shaped pipe; and a connecting rope passing through the guide rope pipe is connected between the bottom end of the first arc-shaped rod and the inner bottom of the lifting strip.

4. The denitration system according to claim 1, wherein a microcontroller, a warning light, and an alarm are sequentially installed on the top of the fixed shell; a support plate is fixedly installed on the top of the fixed shell; a micro motor is fixedly installed on the top of the support plate; a gear is fixedly arranged on the output end of the micro motor; a gear ring is fixedly installed on the top of the rotating plate and engaged with the gear; the mixing conveying part comprises a mixing box; an air inlet cylinder fixedly and communicatively connected with the flue gas duct of the combined cycle unit is fixedly arranged on the top of the mixing box; a plurality of air outlet pipes are uniformly and communicatively arranged on the circumferential side of the air inlet cylinder; a nitrogen oxide flue gas monitor is arranged in the air outlet pipe; the pressing part comprises a connecting plate; two symmetrical ear plates are fixedly arranged on the side of the connecting plate; a support spring is fixedly arranged between the top of the rotating plate and the ear plate; a fixed plate is fixedly arranged between the two ear plates on the side of the connecting plate; a second electromagnetic suction disc is fixedly installed on the ground of the fixed plate; and a second iron block is fixedly arranged on the top of the rotating plate.

5. The denitration system according to claim 1, wherein a plurality of vertical rods are uniformly fixedly arranged on the bottom of the connecting plate; a piston plate is fixedly arranged on the end of the vertical rod; a pressing block is fixedly arranged on the bottom of the piston plate; a plurality of piston cavities slidably matched with the piston plate are uniformly formed on the inner top of the rotating plate; a sliding hole slidably matched with the vertical rod is formed on the inner top of the piston cavity; a guide groove is formed on the inner circumferential side of the feeding pipe, the placement cavity, and the storage pipe; a sliding block slidably matched with the guide groove is fixedly arranged on the outer circumferential side of the denitration catalyst block; and an insertion slot insertedly matched with the pressing block is formed on the outer circumferential side of the denitration catalyst block. ​ ​ The outer peripheral side of the air inlet pipe and the air outlet pipe is fixed with a support plate; the side of the support plate is fixed with a second arc-shaped rod coaxial with the air inlet pipe; the end of the second arc-shaped rod is fixed with a squeeze ball; the fixed frame comprises a U-shaped seat; the two ends of the U-shaped seat are fixed with a sleeve ring; the outer peripheral side of the air inlet pipe and the air outlet pipe is provided with an annular groove matched with the sleeve ring; the side of the U-shaped seat is fixed with an L-shaped plate; the end of the L-shaped plate is fixed with a support ring; the inner wall of the support ring is fixed with a mounting pipe; one end of the mounting pipe is fixedly connected with the connecting pipe through a connecting flange; the other end of the mounting pipe is fixed with a high-temperature-resistant conveying hose; one end of the high-temperature-resistant conveying hose is fixedly connected with the air inlet pipe through a connecting flange; the peripheral side of the sleeve ring is fixed with an extension plate; the end of the extension plate is fixed with a ball seat matched with the squeeze ball; the top of the ball seat is provided with an elastic air bag, and the bottom thereof is provided with a first air guide pipe in communication; The outer peripheral side of the rotating plate is provided with a first annular sealing groove at both ends of the placement cavity; the inner peripheral side of the annular cavity is symmetrically provided with a second annular sealing groove coaxial with the air inlet pipe; the end of the second annular sealing groove is provided with an elastic diaphragm; the inner wall of the second annular sealing groove is provided with a second air guide pipe in penetration; the first air guide pipe and the second air guide pipe are connected through a hose.

2. The denitration system for a 100MW level combined cycle unit according to claim 1, characterized in that: The outer peripheral side of the mixing box is uniformly and obliquely provided with branch pipes in communication; each of the branch pipes is connected with the air outlet pipe through a high-temperature-resistant connecting hose; the outer peripheral side of the mixing box is uniformly and obliquely provided with ammonia gas conveying pipes in communication.

3. The denitration system for a 100MW level combined cycle unit according to claim 2, characterized in that: The bottom of the mixing box is provided with an inner vertical pipe in communication; the outer peripheral side of the inner vertical pipe is provided with an outer vertical pipe coaxial; a gas conveying cavity is formed between the inner vertical pipe and the outer vertical pipe; the peripheral side of the inner vertical pipe is uniformly provided with a plurality of filtering holes; The bottom of the gas conveying cavity is fixedly provided with a mounting bottom plate; the bottom of the mounting bottom plate is fixedly provided with a transfer box through fastening bolts; the top of the transfer box is uniformly provided with plug-in pipes in penetration and communication; the inner bottom surface of the gas conveying cavity is uniformly provided with plug-in holes matched with the plug-in pipes in plug-in cooperation; the peripheral side of the transfer box is uniformly provided with a plurality of connecting pipes in communication; the connecting pipes are fixedly connected with corresponding air inlet pipes through connecting flanges.

4. The denitration system for a 100MW level combined cycle unit according to claim 3, characterized in that: The inner bottom surface of the mixing box is provided with a reciprocating screw rod penetrating and rotating into the inner vertical pipe; the peripheral side of the reciprocating screw rod is fixedly provided with an impeller close to the top end thereof; the bottom of the mixing box is symmetrically fixed with a sliding rod; the reciprocating screw rod is provided with a sliding sleeve matched therewith; the peripheral side of the sliding sleeve is symmetrically fixed with lifting plates matched with the sliding rod in sliding cooperation; the ends of the two lifting plates are fixed with a lifting ring coaxial with the reciprocating screw rod; the peripheral side of the lifting ring is uniformly provided with a plurality of bristles. The bottom end of the reciprocating wire rod is fixed with a square column; the top of the transfer box is provided with a connecting shaft penetratingly and rotatably; the top end of the connecting shaft is provided with a square slot matched with the square column; the bottom end of the connecting shaft is fixed with a stirring shaft; the stirring shaft is uniformly fixed with a plurality of stirring rods on the lateral surface.

5. The denitration system for a 100 MW level combined cycle unit according to claim 4, characterized in that: The extension pipe is internally fixedly installed with an electromagnetic coil; the extension pipe is internally slidably provided with a jackscrew; the jackscrew and the extension pipe are fixed with a return spring; one end of the jackscrew is fixed with a connecting column; the connecting column is fixed at the end with an armature column; the input end of the microcontroller is electrically connected with the nitrogen oxide flue gas monitor, and the output end thereof is electrically connected with the micro motor, the first electromagnetic chuck, the second electromagnetic chuck, the electromagnetic coil, the warning light and the alarm respectively; The end of the extension pipe is fixed with an ear seat; the side surface of the ear seat is provided with a threaded sleeve penetratingly; the threaded sleeve is internally threadedly rotatably provided with a top rod penetratingly and slidably accommodated in the receiving tube.

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