CN111829355B - A kind of flue gas treatment equipment - Google Patents

Abstract

The present application relates to a flue gas treatment equipment, and relates to the field of flue gas treatment equipment, which includes a flue and an ash cleaning component disposed in the flue. The ash cleaning assembly includes an outer toothed ring, a gear, a first motor and a plurality of ash cleaning bars, the outer toothed ring is coaxially arranged on the inner wall of the flue, and the outer toothed ring and the smoke The inner wall of the flue is rotatably connected, the side wall of the flue is provided with an opening, the gear meshes with a section of the outer gear ring located at the opening, the first motor drives the gear to rotate, and the cleaning bar Fixedly connected with the outer gear ring, each of the ash cleaning strips is in contact with the inner wall of the flue. The present application can improve the cooling effect on the flue gas.

Description

A kind of flue gas treatment equipment

technical field

The present application relates to the field of flue gas treatment equipment, in particular to a flue gas treatment equipment.

Background technique

In a lime production plant, limestone is calcined into lime, and a large amount of flue gas will be generated in the process. Such flue gas contains solid particles, nitrogen monoxide, carbon dioxide and nitrogen dioxide. When treating the exhaust gas, it is necessary to The flue gas is subjected to a pre-treatment process and a post-treatment process in sequence. The pre-treatment process includes cooling and dust removal, and the post-treatment process is to remove nitrogen and sulfur compounds in the flue gas through chemical reaction.

In the related art, the Chinese patent with the application number of 201620648162.0 announced a high-efficiency boiler flue gas treatment device, which includes a treatment box, a left box chamber, and a right box room. The inside of the treatment box is composed of a left box room and a right box room. The top is connected to the top of the right box chamber through a curved gas delivery pipe; the bottom end of the left box chamber is equipped with an air inlet pipe, the bottom end of the left box chamber is equipped with a cooling chamber, and the bottom end of the cooling chamber is connected to the air inlet pipe; the upper end of the cooling chamber is connected to the front filter chamber through a smoke delivery pipe; The upper end of the front filter chamber is connected to the rear filter chamber by a smoke pipe; the upper end of the right box chamber is equipped with a denitration chamber; the top of the denitration chamber is connected to the rear filter chamber by a curved gas pipe; For the spray device, the lower end of the desulfurization chamber is connected to the circulating desulfurization liquid tank through the drain pipe, and the circulating desulfurization liquid tank is connected to the spray device. When in use, the flue gas enters the cooling chamber from the intake pipe for heat exchange and cooling through the plate heat exchanger, and then enters the front filter chamber. After the stainless steel alloy filter screen, stainless steel mat mesh and activated carbon adsorption filter screen filter out fine impurities and absorb peculiar smell inside the rear filter chamber, it enters the denitration chamber and is denitrified by limestone solution. The aqueous solution is sprayed and desulfurized and discharged.

In view of the above-mentioned related technologies, the inventor believes that when there is a pre-treatment process for the flue gas, a plate heat exchanger is used to cool the flue gas, and after long-term use, a lot of smoke and dust will accumulate on the plate heat exchanger. , the cooling effect of the plate heat exchanger decreases, resulting in the defect of poor cooling effect on the flue gas.

SUMMARY OF THE INVENTION

In order to improve the cooling effect of flue gas, the present application provides a flue gas treatment device.

A kind of flue gas treatment equipment provided by this application adopts the following technical scheme:

A flue gas treatment equipment includes a flue and a ash cleaning assembly arranged in the flue, the cross section of the inner wall of the flue is circular along a direction perpendicular to the flow of the flue gas, and the ash cleaning component includes an outer toothed ring , a gear, a first motor and a plurality of ash cleaning bars, the outer gear ring is coaxially arranged on the inner wall of the flue, and the outer gear ring is rotatably connected with the inner wall of the flue, and the side wall of the flue is provided with There is an opening, the gear and a section of the outer gear ring located at the opening are meshed with each other, the first motor drives the gear to rotate, the ash cleaning strip is fixedly connected with the outer gear ring, and each The ash cleaning strips are all in contact with the inner wall of the flue.

By adopting the above technical solution, during use, the flue gas passes through the flue, and the flue conducts heat exchange with the outside air, so that the flue gas can be gradually cooled during the process of passing through the flue, thereby cooling the flue gas; When there are many particles attached to the inner wall of the duct, the first motor drives the gear to rotate, and when the gear rotates, it drives the outer gear ring to rotate. When the outer gear ring rotates, it can drive the ash cleaning bar to rotate. The ash and slag are scraped off; the ash and slag adhering to the inner wall of the flue can be scraped off by setting the ash-cleaning strip, which can improve the heat dissipation effect of the flue gas when it passes through the flue.

Preferably, the ash cleaning strip is provided with a plurality of atomizing nozzles.

By adopting the above technical solution, when the flue gas passes through the flue, the atomizing nozzle communicates with the water source and sprays water mist toward the flue. The flue gas is cooled down; in the process of spraying water mist from the atomizing nozzle, the first motor in the cleaning assembly drives the cleaning strip to rotate. When the cleaning strip rotates, it can drive the atomizing nozzle to rotate. It can more uniformly cool the flue gas in the flue, reduce the excessive concentration of the water mist sprayed by the atomizing nozzle, and improve the cooling effect of the flue gas; The fluctuation of the air in the flue further makes the water mist sprayed by the atomizing nozzle fully contact with the flue gas, and further improves the cooling effect of the flue gas.

Preferably, the inner wall of the flue is provided with a chute, the chute is spirally arranged on the inner wall of the flue along the flow direction of the flue gas, the atomizing nozzle is slidably connected to the chute, and the mist A telescopic rod is arranged between the spray head and the cleaning strip.

By adopting the above technical solution, when the ash cleaning bar rotates forward and reverse, since the atomizing nozzle is slidably connected with the chute, and the chute is spiral along the flow direction of the flue gas, the ash cleaning bar can drive the fog when the ash cleaning bar rotates forward and reverse. The atomizing nozzle rotates along the inner wall of the flue while moving in the axial direction of the inner wall of the flue, so that the water mist sprayed by the atomizing nozzle can be more fully contacted with the flue gas, thereby further improving the cooling effect of the flue gas.

Preferably, the inner wall of the flue is wavy along a direction parallel to the flow of the flue gas.

By adopting the above technical solution, when the flue gas passes through the different inner diameters of the flue, when the flue gas moves from the larger inner diameter of the flue to the smaller inner diameter of the flue, the flue gas has a movement tendency to converge towards the central axis of the flue, and the flue gas flows from the flue. When the inner diameter of the flue is larger and the inner diameter of the flue is smaller, the flue gas tends to diverge outward toward the side away from the central axis of the flue; The sprayed water mist is fully contacted, so that the cooling effect of the flue gas can be improved.

Preferably, a plurality of picks are fixed on the ash cleaning strip.

By adopting the above technical solution, when the ash cleaning strip rotates, it drives the paddle to rotate synchronously, and when the paddle rotates, the air in the flue fluctuates, so that the water mist and the flue gas can be more fully mixed in the flue, so that the Improve the cooling effect of flue gas.

Preferably, the flue includes an air inlet end and an air outlet end, and the air outlet end of the flue is provided with a breathable dustproof cloth.

By adopting the above technical solution, a breathable dustproof cloth is arranged at the gas outlet end of the flue, and the cooled smoke residue is attached to the breathable dustproof cloth for collection; by arranging the breathable dustproof cloth at the gas outlet, the breathable dustproof cloth can be avoided Burned by high temperature smoke, it can improve the service life of breathable dustproof cloth.

Preferably, the flue is inclined downward along the conveying direction of the flue gas from the air inlet end to the air outlet end, and a discharge port is provided at the bottom of one end of the flue close to the breathable dustproof cloth. An inspection door is detachably and fixedly connected at the material opening.

By adopting the above technical solution, when the flue gas passes through the flue, the ash cleaning strip scrapes off the soot on the inner wall of the flue, and part of the soot flows to the discharge port synchronously with the flow direction of the flue gas, and gathers at the discharge port. When there is a lot of smoke residue, open the inspection door, and the smoke residue can be discharged from the discharge port; by setting the discharge port and the inspection door, it is convenient for the operator to clean the smoke residue.

Preferably, the inner wall of the flue is provided with a hitting assembly, the hitting assembly includes a hitting block and a second motor, the hitting block is rotatably connected to the flue, and the hitting block moves along the flue. When the track rotates, it can be in contact with the breathable dustproof cloth, and the second motor drives the hitting block to rotate.

By adopting the above technical solution, when there is a lot of soot accumulated on the breathable dustproof cloth, the second motor drives the hitting block to rotate, and when the hitting block rotates, the soot dust can be hit and dropped from the breathable dustproof cloth. Thus, the breathable dustproof cloth can be used continuously.

Preferably, the bottom of the breathable dustproof cloth is arranged at the discharge port.

By adopting the above technical solution, the smoke residue on the breathable dustproof cloth falls to the discharge port, so that it can be collected together with the smoke residue scraped from the inner wall of the flue, which facilitates the centralized collection of the smoke residue by the operator.

Preferably, the air inlet end of the flue is detachably and fixedly connected with a dust-proof net.

By adopting the above technical solution, a dust filter is arranged at the intake end of the flue, which can filter out part of the smoke residue in advance, avoid the smoke residue from dissipating heat in the flue, and improve the cooling effect of the flue gas to a certain extent.

To sum up, the present application includes at least one of the following beneficial technical effects:

1. By setting the first motor to drive the ash cleaning bar to rotate, the smoke residue attached to the inner wall of the flue can be scraped off, which can improve the cooling effect of the flue gas;

2. By setting the atomizing nozzle to move along the chute, the mixing degree of the water mist and the flue gas ejected by the atomizing nozzle can be further improved, thereby further improving the cooling effect of the flue gas;

3. By setting the paddles to disturb the air flow in the flue, the cooling effect on the flue gas can be further improved.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the embodiment of the present application;

2 is a schematic diagram of the internal structure of a flue according to an embodiment of the present application;

Fig. 3 is the exploded structure schematic diagram of the material clipping component of the embodiment of the present application;

Fig. 4 is the exploded structure schematic diagram of the ash cleaning assembly of the embodiment of the present application;

FIG. 5 is a partial enlarged schematic view of part A in FIG. 2 .

Description of reference numerals: 1, flue; 11, inlet end; 12, outlet end; 121, exhaust fan; 13, dust filter; 14, discharge port; 15, inspection door; 16, collecting trough; 2 , ash cleaning assembly; 21, external gear ring; 22, gear; 23, first motor; 24, ash cleaning strip; 25, paddle; 26, mounting seat; 27, opening; 3, clamping assembly; 31, bottom ring; 32, clamping ring; 33, clamping groove; 34, breathable dust cloth; 4, hitting assembly; 41, rotating column; 42, hitting block; 43, second motor; 5, guide assembly; 51 , guide ring; 52, rotating ring; 53, guide groove; 6, chute; 61, slider; 62, telescopic rod; 621, fixed column; 622, movable column; 63, sliding groove; 65, atomizing nozzle.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-5.

The embodiment of the present application discloses a flue gas treatment device. Referring to FIG. 1 , a flue gas treatment device includes a flue 1 and an ash cleaning assembly 2 .

1 and 2, the cross-section of the inner wall of the flue 1 is circular along the flow direction perpendicular to the flue gas, and the inner wall of the flue 1 is wavy along the flow direction parallel to the flue gas; the flue 1 includes an intake end 11 and the gas outlet 12, set the central axis of the inner cavity of the flue 1 as the A axis, and the flue 1 is inclined downward along the A axis from the intake end 11 to the gas outlet end 12; the intake end 11 of the flue 1 can be The dustproof net 13 is detachably and fixedly connected, and the material of the dustproof net 13 is iron. The dustproof net 13 and the inner wall of the flue 1 are detachably and fixedly connected by screws; .

Referring to FIGS. 2 and 3 , the gas outlet end 12 of the flue 1 is provided with a clipping component 3 , and the clipping component 3 includes a bottom ring 31 and a clipping ring 32 . The bottom ring 31 and the inner wall of the flue 1 are detachably and fixedly connected by screws. The end wall of the bottom ring 31 is coaxially provided with a clamping groove 33, and the clamping ring 32 is detachably embedded in the clamping groove. Inside 33, the clamping ring 32 and the bottom ring 31 are detachably and fixedly connected by screws, and a breathable dustproof cloth 34 is sandwiched between the clamping ring 32 and the clamping groove 33, and the edge of the breathable dustproof cloth 34 is clamped on the clamping material. Between the ring 32 and the inner wall of the material clamping groove 33, in this embodiment, the material of the breathable dustproof cloth 34 is cotton cloth.

Referring to FIG. 2 , the inner wall of the flue 1 is provided with a striking assembly 4, and the striking assembly 4 is arranged on the side of the breathable dustproof cloth 34 close to the direction of the smoke. The striking assembly 4 includes a rotating column 41, a striking block 42 and a second The motor 43 and the rotating column 41 are rotatably connected to the inner wall of the flue 1, the axis of rotation of the rotating column 41 is perpendicular to the axis direction of the inner wall of the flue 1, the beating block 42 is welded with the rotating column 41, and the beating block 42 is away from the end of the rotating column 41 It is a round head, and the hitting block 42 can be in contact with the breathable dustproof cloth 34 when it rotates. The second motor 43 is a servo motor, and the motor shell of the second motor 43 is fixedly connected to the outer wall of the flue 1 by screws. The output shaft passes through the side wall of the flue 1 and is coaxially and fixedly connected to the rotating column 41 by means of a key connection.

Referring to FIG. 2 , a discharge port 14 is opened at the bottom of one end of the flue 1 close to the breathable dustproof cloth 34, the discharge port 14 is semicircular, and the discharge port 14 is detachably and fixedly connected with an inspection door 15 by screws. The inspection door 15 An end close to the inner wall of the flue 1 is provided with a collecting groove 16 , and the collecting groove 16 is located under the breathable dustproof cloth 34 .

2 and 4 , the cleaning assembly 2 includes an outer gear ring 21 , a gear 22 , a first motor 23 and a plurality of cleaning bars 24 . The side walls of the cleaning bars 24 are welded with a plurality of picks 25 . A guide assembly 5 is provided, and the guide assembly 5 includes two guide rings 51 arranged in parallel. 21 is sandwiched between two guide rings 51; two end walls of the outer gear ring 21 in the axial direction are respectively coaxially welded with a rotating ring 52, and one end of each guide ring 51 close to the outer gear ring 21 is coaxially provided with a guide. The groove 53, the rotating ring 52 is rotatably connected to the guide groove 53; a mechanical seal (not shown in the figure) is sandwiched between the inner wall of each guide groove 53 and the guide ring 51. The outer wall of the flue 1 is welded with a mounting seat 26, the gear 22 is rotatably connected to the side wall of the mounting seat 26, the side wall of the flue 1 is provided with an opening 27, and the gear 22 and a section of the outer gear ring 21 located at the opening 27 are meshed with each other; the first motor 23 is a servo motor, the motor shell of the first motor 23 is fixedly connected to the mounting seat 26 by screws, and the output shaft of the first motor 23 is fixedly connected to the gear 22 coaxially by means of a key connection. In this embodiment, there are three cleaning bars 24. One end of the cleaning bars 24 is welded to the outer toothed ring 21. Each cleaning bar 24 includes a side wall that is attached to the inner wall of the flue 1. The cleaning bars 24 can be along the The inner wall of flue 1 rotates.

4 and 5 , the inner wall of the flue 1 is provided with a chute 6, and the chute 6 is spirally arranged on the inner wall of the flue 1 along the A-axis. The slider 61, the slider 61 is a trapezoidal block; a telescopic rod 62 is provided between each slider 61 and the ash cleaning strip 24, the telescopic rod 62 includes a fixed column 621 and a movable column 622, the fixed column 621 is hollow and movable The column 622 is slidably connected to the inner wall of the fixed column 621 along the diameter direction parallel to the inner wall of the flue 1, and the end of the movable column 622 away from the chute 6 is slidably connected to the side wall of the ash cleaning strip 24, and the movable column 622 is along the movement direction of the ash cleaning strip 24. Parallel to the axis of the inner wall of the flue 1, a T-shaped sliding groove 63 is opened on the side wall of the ash cleaning strip 24, the end wall of the movable column 622 is welded with a T-shaped sliding block that is slidably connected in the sliding groove 63, and the inner wall of the fixed column 621 and The cross-section of the outer wall of the movable column 622 perpendicular to the movement direction of the movable column 622 is rectangular. Each fixed column 621 is fixedly connected with an atomizing nozzle 65 by screws. The perimeter wall of the flue is fixed and bonded by glue to a main water pipe that communicates with a water source. The water source is an urban water supply system. Multiple water distribution pipes are connected to the main water pipe. In this embodiment, the main water pipe and the water distribution pipe are plastic hoses.

The implementation principle of the flue gas treatment equipment in the embodiment of the present application is as follows: during operation, the flue gas is introduced into the flue 1, and during this process, the extraction fan 121 operates, and the flue gas in the flue 1 flows along the A axis. When the gas end 11 moves toward the side of the gas outlet 12, when the flue gas moves from the larger inner diameter of the flue 1 to the smaller inner diameter of the flue 1, the flue gas converges toward the A axis, and the flue gas flows from the inner diameter of the flue 1 to the flue 1. When the inner diameter is larger, the flue gas diverges outward toward the side away from the A-axis.

When the flue gas passes through the flue 1, the ash cleaning assembly 2 runs. At this time, the first motor 23 drives the gear 22 to rotate forward and reverse. When the gear 22 rotates, it drives the outer gear ring 21 to rotate, and when the outer gear ring 21 rotates, it drives the ash cleaning strip. 24 rotates, when the ash cleaning bar 24 rotates, it drives the paddle 25 to rotate, and when the paddle 25 rotates, it drives the air in the flue 1 to shake; when the ash cleaning bar 24 rotates, the ash cleaning bar 24 drives the telescopic rod 62 to move. The slider 61 slides along the chute 6. When the slider 61 slides along the chute 6, the atomizing nozzle 65 moves along the A-axis and along the circumferential direction of the inner wall of the flue 1. The atomizing nozzle 65 moves toward the inside of the flue 1 while moving. When spraying water mist, when the atomizing nozzle 65 sprays the water mist, the water mist is in full contact with the flue gas, thereby cooling the flue gas.

When the ash cleaning strip 24 moves, the soot residue on the inner wall of the flue 1 is scraped off, so the soot residue flows with the flue gas into the collecting tank 16 for collection; in addition, part of the soot residue in the flue gas is attached to the breathable dustproof cloth 34 At this time, the second motor 43 drives the rotating column 41 to rotate, and when the rotating column 41 rotates, it drives the hitting block 42 to rotate. When the hitting block 42 rotates, it hits the breathable dustproof cloth 34, and the smoke on the breathable dustproof cloth 34 is hit. The slag can fall into the collecting tank 16; when the soot in the collecting tank 16 accumulates a lot, open the inspection door 15, pour out the soot in the collecting tank 16, and then install the inspection door 15 back to the original position.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (7)

1. A flue gas treatment equipment, characterized in that: it comprises a flue (1) and an ash cleaning assembly (2) arranged in the flue (1), and the inner wall of the flue (1) is perpendicular to the flue The cross section in the air flow direction is circular, and the cleaning assembly (2) includes an outer gear ring (21), a gear (22), a first motor (23) and a plurality of cleaning strips (24). The toothed ring (21) is coaxially arranged on the inner wall of the flue (1), and the outer toothed ring (21) is rotatably connected with the inner wall of the flue (1), and the side wall of the flue (1) is provided with an opening (27), the gear (22) meshes with a section of the outer gear ring (21) located at the opening (27), and the first motor (23) drives the gear (22) to rotate, The ash cleaning strips (24) are fixedly connected with the outer toothed ring (21), and each of the ash cleaning strips (24) is in contact with the inner wall of the flue (1); The inner wall of the flue (1) is wavy along the flow direction parallel to the flue gas; The ash cleaning strip (24) is provided with a plurality of atomizing nozzles (65); Each ash cleaning strip (24) includes a side wall that is attached to the inner wall of the flue (1), and the ash cleaning strip (24) can rotate along the inner wall of the flue (1); The inner wall of the flue (1) is provided with a chute (6), the chute (6) is spirally arranged on the inner wall of the flue (1) along the flow direction of the flue gas, and the chute (6) slides inside A plurality of sliding blocks (61) are connected, the sliding blocks (61) are trapezoidal blocks, and a telescopic rod (62) is arranged between each sliding block (61) and the cleaning strip (24), and the cleaning strip (24) ) The side wall is provided with a T-shaped sliding groove (63), and the telescopic rod (62) is slidably connected in the sliding groove (63); the atomizing nozzle (65) is arranged on the telescopic rod (62). 2 . The flue gas treatment equipment according to claim 1 , wherein a plurality of picks ( 25 ) are fixedly connected to the ash cleaning strip ( 24 ). 3 . 3. A flue gas treatment device according to claim 1, characterized in that: the flue (1) comprises an inlet end (11) and an outlet end (12), and the flue (1) has The air outlet end (12) is provided with a breathable dustproof cloth (34). 4. A flue gas treatment device according to claim 3, characterized in that: the flue (1) is inclined from the air inlet end (11) to the air outlet end (12) along the conveying direction of the flue gas. A discharge port (14) is provided at the bottom of one end of the flue (1) close to the breathable dustproof cloth (34), and an inspection door (15) is detachably and fixedly connected to the discharge port (14). ). 5. A flue gas treatment device according to claim 3, characterized in that: the inner wall of the flue (1) is provided with a beating assembly (4), and the beating assembly (4) comprises a beating block ( 42) and a second motor (43), the beating block (42) is rotatably connected to the flue (1), and the beating block (42) can be rotated along the flue (1) with any The breathable dustproof cloth (34) is in contact, and the second motor (43) drives the striking block (42) to rotate. 6 . The flue gas treatment equipment according to claim 4 , wherein the bottom of the air-permeable dust-proof cloth ( 34 ) is arranged at the discharge port ( 14 ). 7 . 7 . The flue gas treatment equipment according to claim 1 , wherein the air inlet end ( 11 ) of the flue ( 1 ) is detachably and fixedly connected with a dust filter ( 13 ). 8 .

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