Flue gas filtration, desulfurization and denitrification equipment and method suitable for cement kiln

Abstract

The invention discloses flue gas filtering, desulfurization and denitrification equipment and method suitable for a cement kiln, and relates to the technical field of filtering equipment.The structure of a low-sulfur flue gas desulfurization, denitrification and dust removal device in the tail of the cement kiln in the prior art is optimized and improved, and a supporting shell of the device is optimized into a transversely-arranged treatment bin body; a plurality of air guide pipe bodies in the air guide pipe are optimized to be horizontally-arranged hard square pipes, and air outlets of the pipe bodies are formed in the tops of the pipe bodies. The flue gas filtration, desulfurization and denitrification equipment suitable for the cement kiln is simple and convenient in consumable replacement, high in activated carbon utilization rate, good in smoke dust filtration effect, relatively high in stability and continuity of adsorption and filtration effects, relatively small in size and relatively low in cost. The phenomenon that the loaded activated carbon falls off and further the activated carbon layer at the local position is seriously weak or even completely lost is not prone to occurring, the activated carbon layer is good in stability in the moving process, the thickness of the activated carbon layer is large, and the technical effects that the abrasion of the filter belt in the using process is relatively small, and the service life is relatively long are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering equipment, and in particular to a flue gas filtering, desulfurization and denitrification equipment and method suitable for cement kilns. Background Art

[0002] With the continuous improvement of environmental protection requirements, it has become a normal practice to desulfurize flue gas at the tail of cement kiln. Generally, the activated carbon adsorption method in dry desulfurization is selected for desulfurization. A certain degree of denitrification can be achieved while desulfurizing with activated carbon.

[0003] The activated carbon of the existing flue gas dry desulfurization and denitrification device is always in a static state during the desulfurization and denitrification process. The flue gas cannot come into contact with the unsaturated activated carbon well, and the desulfurization and denitrification effect is general.

[0004] In response to the above problems, a Chinese invention patent with authorization announcement number CN118416612B discloses a device and method for desulfurization, denitrification and dust removal of low-sulfur flue gas at the tail of a cement kiln; by optimizing and improving the structure of the low-sulfur flue gas desulfurization, denitrification and dust removal device in the prior art, a first filter belt assembly and a second filter belt assembly with a scroll-shaped main body densely covered with meshes are combined to form an activated carbon storage container for filtering and adsorbing flue gas; a cylindrical wheel densely covered with spikes is used as a guide wheel for the first filter belt assembly and the second filter belt assembly to achieve a dredging effect; the first filter belt assembly and the second filter belt assembly in the supporting shell are in a bow spring shape under the guidance of the cylindrical wheel; when in use, the flue gas is guided through the first filter belt assembly and the second filter belt assembly for treatment.

[0005] Although the above scheme achieves the effects of simple replacement of consumables, convenient maintenance, full utilization of activated carbon, convenient cleaning, non-clogging of mesh holes, good filtering effect on smoke and dust, and strong stability and sustainability of adsorption and filtration effects in the desulfurization, denitrification and dust removal device of low-sulfur flue gas at the tail of cement kiln; however, the overall volume of the equipment is relatively large, the combination of the first filter belt assembly and the second filter belt assembly relies on magnetic force, which causes local activated carbon to easily fall off during multiple reversing movements (which can easily cause the activated carbon layer in a local position to be seriously weakened or even completely missing), and due to its own structure, the thickness of activated carbon that can be accommodated between the first filter belt assembly and the second filter belt assembly is relatively thin (the filtering and desulfurization and denitrification effects of a thinner activated carbon layer are relatively poor compared to a thicker activated carbon layer), the structure of the flue gas channel is relatively complex, the maintenance of the flue gas channel is relatively difficult, and during operation, the first filter belt assembly and the second filter belt assembly have more friction and greater wear with the flue gas channel, which affects the overall service life of the first filter belt assembly and the second filter belt assembly and increases the maintenance frequency and maintenance cost.

[0006] Therefore, there is a need for a flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns, which has the advantages of simple and convenient replacement of consumables, high utilization rate of activated carbon, good filtering effect on smoke and dust, strong stability and sustainability of adsorption and filtration effects, small size, not prone to the drop of activated carbon carried, which would lead to severe weakening or even complete loss of the activated carbon layer in local areas, good stability during the movement of the activated carbon layer, thick activated carbon layer, relatively little wear of the filter belt during use and relatively long service life. Summary of the invention

[0007] The embodiment of the present application provides a flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns, thereby solving the technical effects that the flue gas filtration, desulfurization and denitrification equipment in the prior art is large in size, easily causing the activated carbon layer to be severely weakened or even completely missing in some parts, the activated carbon layer has poor stability during movement, the activated carbon layer is thin in thickness, the filter belt is relatively greatly worn during use and has a relatively short service life; the flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns has the technical effects of simple and convenient replacement of consumables, high activated carbon utilization rate, good filtering effect on smoke and dust, strong stability and sustainability of adsorption and filtration effects, small size, not prone to the falling of the carried activated carbon, which leads to the severe weakening or even complete missing of the activated carbon layer in some parts, good stability during movement of the activated carbon layer, thick activated carbon layer, relatively small wear of the filter belt during use and relatively long service life.

[0008] The embodiment of the present application provides a flue gas filtration desulfurization and denitrification device suitable for a cement kiln, comprising a processing bin, a filter belt group, and a dust filter belt assembly;

[0009] The processing bin body is provided with a feeding bin body with a built-in adding component on one side, and an output bin body on the other side, and an exhaust port is provided on the top, and an air flow channel tube is built-in; the air flow channel tube is a horizontally placed hard tube with a flat top surface, connected to the air injection pipe, and a row of top exhaust grooves is provided on the top surface;

[0010] The two ends of the filter belt group are respectively located in the feeding bin and the output bin, penetrate into the processing bin and are arranged horizontally in the processing bin, including a first carrier assembly and a second carrier assembly; the first carrier assembly and the second carrier assembly have the same structure, are stacked together, and are both in the shape of a scroll as a whole, and are attached together in the processing bin to form a strip space; the adding assembly adds fillers on the second carrier assembly;

[0011] The dust filter belt assembly is a horizontally placed scroll-shaped filter screen structure, which is used to filter dust in the smoke. It is closely attached to the top of the airflow channel tube and is pressed underneath by the second carrier belt assembly.

[0012] Furthermore, the feeding bin is closely attached to the output bin and the processing bin; a through-port is provided on the side wall of the processing bin close to the feeding bin, and a through-port is provided on the side wall close to the output bin; the through-port and the through-port are horizontal rectangular through slots for the filter belt group to pass through; the through-port and the through-port are both provided with multiple rows of brushes;

[0013] The top exhaust slot is a rectangular through slot, and the length direction is the same as the width direction of the airflow channel tube.

[0014] Furthermore, the first carrier tape assembly includes a carrier tape body, a side assembly strip, a rear reel and a front reel;

[0015] The carrier body is in a belt shape as a whole and is densely covered with through holes;

[0016] The side assembly strip is a hose, fixed to the two side edges of the carrier body and having the same length as the carrier body, and filled with metal and / or non-metal;

[0017] The rear reel and the front reel are both horizontally arranged hoisting structures, and are positioned in the feeding bin and the output bin respectively;

[0018] The widths of the two carriers are different, the width difference is greater than 5 cm, and the width is greater than the length of the top exhaust groove by more than 5 cm.

[0019] Furthermore, the dust filter belt assembly includes a first reel, a second reel and a dust filter belt; the first reel and the second reel are both hoisting structures, respectively positioned in the feeding bin and the output bin, for winding up and releasing the dust filter belt;

[0020] The dust filter belt is a belt-shaped filter screen, with two ends respectively wound and positioned on the first reel and the second reel, and a width greater than a width of the carrier body; the bottom surface of the dust filter belt is in close contact with the top surface of the carrier body of the second carrier assembly;

[0021] The dust filter belt passes through the through-inlet and the through-outlet, and the bottom thereof covers and is closely attached to the top of the airflow channel tube and slides thereon.

[0022] Furthermore, a cleaning component and a dredging rotating column are positioned in the feeding bin and / or the output bin;

[0023] The cleaning assembly and the dredging rotating column are closely attached to the dust filter belt; the dredging rotating column is a horizontally placed cylinder with needle-like protrusions densely distributed on the side wall, and the dredging rotating column dredges the filter holes on the dust filter belt when it moves;

[0024] The cleaning assembly is a row of gas nozzles and / or liquid nozzles, which clear and clean the filter holes of the dust filter belt by spraying fluid onto the dust filter belt.

[0025] Furthermore, the thickness of the filler is more than 5 cm.

[0026] Preferably, it also includes an expanded filter belt group;

[0027] The structure of the extended filter belt group is the same as that of the filter belt group and is stacked on top of the filter belt group;

[0028] The activated carbon particles in the extended filter belt group are the same size or different from the activated carbon particles in the filter belt group;

[0029] There is a separate add-on assembly to feed the expanded filter belt set;

[0030] During use, the filter belt group and the expansion filter belt group move synchronously or asynchronously.

[0031] Preferably, a partition plate is provided near the middle of the processing chamber;

[0032] The partition plate is a hard plate body, which is arranged vertically and divides the internal space of the processing chamber into two parts; a through hole for the filter belt group to pass through is provided on the partition plate;

[0033] The two spaces are respectively a first warehouse body and a second warehouse body; the first warehouse body is closer to the output warehouse body than the second warehouse body;

[0034] The airflow channel tube is positioned in the first compartment;

[0035] The pump air assembly connects the first chamber body and the second chamber body through a pipeline;

[0036] The second warehouse body has a built-in expansion channel tube;

[0037] The structure of the expansion channel tube is the same as that of the airflow channel tube;

[0038] The expansion channel tube is connected to the gas output tube; one end of the gas output tube is connected to the expansion channel tube, and the other end leads to the outside of the processing chamber.

[0039] Preferably, a rectangular block-shaped cleaning area is provided on the dust filter belt; the cleaning area is densely covered with bristles;

[0040] During the flue gas treatment interval, the dust filter belt assembly is controlled to operate so that the dust filter belt and the carrier body move at a differential speed and the cleaning area moves back and forth on the top surface of the airflow channel tube to scrub the top exhaust slot and the bottom of the carrier body at the bottom.

[0041] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0042] By optimizing and improving the structure of the low-sulfur flue gas desulfurization, denitrification and dust removal device at the tail of cement kiln in the prior art, its supporting shell is optimized into a horizontal processing bin, and the multiple air guide pipes therein are optimized into horizontal hard square tubes, and the air outlet of the pipe body is arranged on the top of the pipe body; by covering the top of the hard square tube with two horizontal filter belts sandwiching an activated carbon layer and controlling its movement by means of roller reeling and releasing; the edges of the two filter belts are tightly attached together under the influence of gravity and do not need to be bent at a large angle; when in use, the flue gas to be treated is passed into the hard square tube so that the flue gas is discharged from the processing bin after passing through the filter belt and the activated carbon layer; the problem of large volume of the gas filtration desulfurization and denitrification equipment in the prior art and easy to cause local The technical effects of serious weakening or even complete missing of the activated carbon layer, poor stability of the activated carbon layer during movement, thin activated carbon layer, relatively large wear of the filter belt during use and relatively short service life are achieved; thereby achieving the technical effects of simple and convenient replacement of consumables of flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns, high activated carbon utilization rate, good filtering effect on smoke, strong stability and sustainability of adsorption and filtration effects, small volume, not prone to falling of the activated carbon carried, which leads to serious weakening or even complete missing of the activated carbon layer in local areas, good stability of the activated carbon layer during movement, thick activated carbon layer, relatively small wear of the filter belt during use and relatively long service life are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the overall structure of the flue gas filtration, desulfurization and denitrification equipment applicable to cement kilns in this application;

[0044] Figure 2 is a simplified structural diagram of a first carrier tape assembly;

[0045] Figure 3 It is a schematic diagram of the positional relationship between the carrier body and the dust filter belt;

[0046] Figure 4 It is a simplified structural diagram of the filter belt group;

[0047] Figure 5 is a schematic diagram of the appearance structure of the airflow channel tube;

[0048] Figure 6 is a schematic diagram of the structure of the airflow channel tube;

[0049] Figure 7 It is a schematic diagram of the layout relationship between the filter belt group and the extended filter belt group;

[0050] Figure 8 It is a schematic diagram of the positional relationship between the filter belt group and the extended filter belt group;

[0051] Fig. 9 A simplified structural diagram of a processing bin body provided with a partition plate;

[0052] Fig.10 This is a schematic diagram of the layout of the clean area on the dust filter belt.

[0053] In the figure:

[0054] The processing bin body 100, the gas injection pipe 110, the exhaust port 120, the air flow channel tube 130, the top exhaust groove 131, the side baffle 132, the top protrusion 133, the blocking brush 140, the partition plate 150, the pump air assembly 151, the expansion channel tube 152, the gas output pipe 153, the cleaning tube 160, the feeding bin body 200, the adding assembly 210, the cleaning assembly 220, the dredging rotating column 230, the output bin body 300, the reversing wheel 301, the filler 401, the expansion filter belt group 402, the first carrier belt assembly 410, the carrier belt body 411, the side assembly strip 412, the rear reel 413, the front reel 414, the second carrier belt assembly 420, the first reel 510, the second reel 520, the dust filter belt 530, and the cleaning area 531. DETAILED DESCRIPTION

[0055] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0056] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0058] Embodiment 1

[0059] like Figure 1 As shown, the flue gas filtration, desulfurization and denitrification equipment applicable to cement kilns includes a processing bin 100, a filter belt group, a dust filter belt assembly, a power assembly and a control unit.

[0060] The processing bin body 100 is used for filtering flue gas and desulfurization and denitrification, and is a horizontally placed rectangular block bin body, with a feeding bin body 200 on one side and an output bin body 300 on the other side; the feeding bin body 200 is closely attached to the output bin body 300 and the processing bin body 100; a through-port is provided on the side wall of the processing bin body 100 close to the feeding bin body 200, and a through-out is provided on the side wall close to the output bin body 300; the through-port and the through-in are horizontally placed rectangular through grooves for the filter belt group to pass through; the through-port and the through-in are both provided with a blocking brush 140; the blocking brush 140 is a combination of multiple rows of brushes, and the bristles of the brush are closely attached to the filter belt group, which plays a role in brushing and cleaning the filter belt group while also playing a role in blocking the through-port and the through-in to a certain extent;

[0061] The top of the processing chamber 100 is provided with an exhaust port 120 for discharging the processed gas;

[0062] like Figure 5 As shown, the processing chamber body 100 is provided with an airflow channel tube 130; the airflow channel tube 130 is a horizontally placed hard square tube, the top surface of which is a plane, and a row of top exhaust slots 131 are provided on the top surface; the length direction of the airflow channel tube 130 is the same as the length direction of the processing chamber body 100, and the top surface is at the same height as the through-port and the through-port;

[0063] The top exhaust groove 131 is a rectangular through groove, and its length direction is the same as the width direction of the airflow channel tube 130; the airflow channel tube 130 is connected to the gas injection pipe 110; the smoke to be treated is injected into the gas injection pipe 110 and flows to the airflow channel tube 130, and is discharged through the top exhaust groove 131 in the airflow channel tube 130.

[0064] Furthermore, one or more inspection openings are provided on the side wall of the processing chamber 100 .

[0065] The adding bin body 200 has an adding component 210 built in; the adding component 210 is used to add activated carbon to the filter belt group in the adding bin body 200 in a timely and quantitative manner. The whole is a combination of an activated carbon storage bin and a material dividing and blocking mechanism, which operates under the control of a control unit and discharges the activated carbon downward in a timely and quantitative manner, which is a prior art.

[0066] The output bin body 300 functions as a container and has a plurality of internally disposed reversing wheels 301 for guiding the directions of the components of the filter belt assembly; the reversing wheels 301 are roller-shaped wheel bodies.

[0067] The filter belt group is used to carry activated carbon involved in flue gas treatment and desulfurize and denitrify flue gas, and its two ends are respectively located in the feeding bin 200 and the output bin 300, penetrate into the processing bin 100 and are arranged horizontally in the processing bin 100, including a first carrier assembly 410 and a second carrier assembly 420;

[0068] The first carrier assembly 410 and the second carrier assembly 420 have the same structure and are both in the shape of a reel. The two are attached together in the processing chamber 100 to form a strip space, and the strip space has a filler 401 therein; the filler 401 is activated carbon particles;

[0069] like Figures 2 to 4 As shown, the first carrier assembly 410 includes a carrier body 411, a side assembly strip 412, a rear roll 413 and a front roll 414;

[0070] The carrier body 411 is in the shape of a belt as a whole, densely covered with through holes, and is a metal thin belt or a high-temperature cloth belt;

[0071] The side assembly strip 412 is a long strip tube made of high temperature cloth or a metal hose, fixed to the two side edges of the carrier body 411 and equal in length to the carrier body 411, and filled with magnets, metals and / or non-metals; the filler in the side assembly strip 412 is particles and / or powder;

[0072] The filler in the side assembly strip 412 acts as a counterweight, so that the carrier bodies 411 of the first carrier assembly 410 and the second carrier assembly 420 are stretched more evenly and can ensure that the carrier bodies 411 of the two are more closely fitted during the movement;

[0073] The rear reel 413 and the front reel 414 are both horizontally arranged hoisting structures, which operate under the control of the control unit to reel in and release the carrier body 411, and are respectively positioned in the feeding bin body 200 and the output bin body 300; the two ends of the carrier body 411 are respectively wound and positioned on the rear reel 413 and the front reel 414;

[0074] The rear reels 413 in the feeding bin 200 are of equal height and are spaced apart by more than 30 cm, and the output port of the adding assembly 210 is located between the two rear reels 413;

[0075] The rear roll 413 of the first carrier assembly 410 is closer to the processing chamber 100; the carrier body 411 of the first carrier assembly 410 is located on the top of the carrier body 411 of the second carrier assembly 420; the widths of the two carrier bodies 411 are different, the width difference is greater than 5 cm, and the width is more than 5 cm greater than the length of the top exhaust groove 131.

[0076] The dust filter belt assembly is a reel-shaped structure, used to filter dust in smoke, with a width greater than that of the first carrier belt assembly 410 and the second carrier belt assembly 420, and is always located below the first carrier belt assembly 410 and the second carrier belt assembly 420, with the top thereof contacting the bottom of the second carrier belt assembly 420;

[0077] The dust filter belt assembly includes a first reel 510, a second reel 520 and a dust filter belt 530; the first reel 510 and the second reel 520 are both hoisting structures, respectively positioned in the feeding bin 200 and the output bin 300, and used to roll up and release the dust filter belt 530; the dust filter belt 530 is a belt-shaped filter screen, and its two ends are respectively wound and positioned on the first reel 510 and the second reel 520, and its width is greater than the width of the carrier body 411; the bottom surface of the dust filter belt 530 is in close contact with the top surface of the carrier body 411 of the second carrier assembly 420;

[0078] like Figure 3 As shown, the dust filter belt 530 passes through the through-inlet and the through-outlet, and the bottom covers and is closely attached to the top of the airflow channel tube 130 and slides thereon.

[0079] Preferably, a cleaning component 220 and a clearing rotating column 230 are positioned in the feeding bin body 200 and / or the output bin body 300; the cleaning component 220 and the clearing rotating column 230 are close to the dust filter belt 530; the clearing rotating column 230 is a horizontally placed cylinder with needle-like protrusions densely distributed on the side wall, and the clearing rotating column 230 clears the filter holes on the dust filter belt 530 when the dust filter belt 530 moves; the cleaning component 220 is a row of gas nozzles and / or liquid nozzles, which clears and cleans the filter holes of the dust filter belt 530 by spraying fluid onto the dust filter belt 530.

[0080] Preferably, during use, the size of the filter holes on the dust filter belt 530 can be changed by controlling the tension and relaxation thereof, thereby reducing the difficulty of unclogging.

[0081] like Figure 3 As shown, preferably, a plurality of partition strips are provided on the carrier body 411; the partition strips have a partitioning effect, thereby reducing the probability of local aggregation of activated carbon.

[0082] like Figure 4 As shown, preferably, when adding activated carbon to the carrier body 411 using the adding assembly 210 , it is not necessary to completely cover the carrier body 411 , and it is only necessary that the width of the activated carbon layer is greater than the length of the top exhaust groove 131 .

[0083] Preferably, the widths of the different top exhaust grooves 131 are different, and the top exhaust groove 131 far away from the gas injection pipe 110 is larger.

[0084] like Figure 6 As shown, preferably, side baffles 132 are provided on both sides of the airflow channel tube 130. The side baffles 132 are hard rectangular plates, which are arranged longitudinally to limit the filter belt group.

[0085] Preferably, a plurality of top protrusions 133 are provided on the top surface of the airflow channel tube 130 , and the top protrusions 133 are hemispherical blocks with smooth tops and a diameter smaller than the width of the top exhaust grooves 131 ; when the filter belt group moves on the airflow channel tube 130 , the activated carbon therein is flipped due to the top protrusions 133 .

[0086] like Figure 7 As shown, preferably, the inner bottom of the airflow channel tube 130 is inclined; cleaning tubes 160 are provided at both ends of the airflow channel tube 130; during use, water is regularly injected into the cleaning tube 160 to rinse and clean the inside of the airflow channel tube 130.

[0087] Preferably, the airflow channel tube 130 has multiple air guides built in; the air guides are hard tubes that are arranged obliquely, and the top is connected to the top exhaust groove 131; after the smoke enters the airflow channel tube 130, it is blown out obliquely from the top exhaust groove 131, thereby contacting the activated carbon more fully.

[0088] Furthermore, the thickness of the filler 401 is greater than 5 cm.

[0089] The power component is used to provide power for the operation of various components of the flue gas filtration, desulfurization and denitrification equipment applicable to cement kilns in this application, and the control unit plays a role in controlling the coordinated operation of various components of the flue gas filtration, desulfurization and denitrification equipment applicable to cement kilns. Both are existing technologies and will not be described in detail here.

[0090] Preferably, the control unit is a combination of a programmable logic controller and control buttons.

[0091] When the flue gas filtration, desulfurization and denitrification equipment applicable to cement kilns in the embodiment of the present application is used:

[0092] 1. First, control the adding component 210 to run and deliver the filler 401 onto the carrier body 411 of the second carrier component 420;

[0093] 2. Control all the rear reels 413, the front reels 414, the first reel 510 and the second reel 520 to rotate synchronously at the same speed, so that the filler 401 is spread on the carrier body 411 in the filling bin 200 to form an activated carbon layer; and the activated carbon layer moves at a uniform speed on the airflow channel tube 130;

[0094] 3. The flue gas after waste heat recovery is pumped into the gas injection pipe 110 so that the flue gas enters the air flow channel pipe 130; the flue gas is filtered by the dust filter belt 530 and then filtered and adsorbed by the activated carbon layer;

[0095] 4. The moving speed of the carrier body 411 is flexibly adjusted according to the concentration of the flue gas to be treated;

[0096] 5. After the carrier body 411 moves to the output bin body 300, the activated carbon carried on it falls naturally under its own weight; (before the belt body on the rear reel 413 is released, the adding component 210 is stopped, and the carrier body 411 is rewound after the filler 401 on the carrier body 411 is released).

[0097] 6. After a certain amount of activated carbon accumulates in the output bin 300, the adsorption condition of the used activated carbon is determined by observing the color change, and whether it can be reused is determined based on the adsorption condition; if it can be reused, it is stirred and mixed and then placed in the adding component 210 for reuse, or it can be mixed with new activated carbon and reused.

[0098] Preferably, Figure 8 and Fig. 9 As shown, it also includes an extended filter belt group 402; the structure of the extended filter belt group 402 is the same as that of the filter belt group, and is stacked on the top of the filter belt group; the activated carbon particles in the extended filter belt group 402 are the same or different in size from the activated carbon particles in the filter belt group; there is an independent adding component 210 to feed the extended filter belt group 402; during use, the filter belt group and the extended filter belt group 402 move synchronously or asynchronously; superimposed use can obtain better adsorption and filtration effects; during the asynchronous movement, it plays a certain role in guiding the direction of the airflow, and during the asynchronous (offset) movement, it also plays a certain role in clearing holes due to mutual friction.

[0099] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0100] The invention solves the problems in the prior art that the flue gas filtration desulfurization and denitrification equipment is large in size, which easily leads to serious weakening or even complete loss of the activated carbon layer in some parts, the activated carbon layer has poor stability during movement, the activated carbon layer is thin, the filter belt is relatively worn out during use and has a relatively short service life; the invention realizes the technical effects that the flue gas filtration desulfurization and denitrification equipment suitable for cement kilns has simple and convenient replacement of consumables, high activated carbon utilization rate, good filtering effect on smoke and dust, strong stability and sustainability of adsorption and filtration effects, small size, and is not prone to the falling of the activated carbon carried, which leads to serious weakening or even complete loss of the activated carbon layer in some parts, good stability during movement of the activated carbon layer, thick activated carbon layer, relatively small wear of the filter belt during use and relatively long service life.

[0101] Embodiment 2

[0102] In order to obtain a better filtering and adsorption effect and make the flue gas treatment more complete, the embodiment of the present application optimizes and improves the structure of the treatment bin 100 on the basis of the above embodiment, specifically:

[0103] like Fig. 9As shown, a partition plate 150 is provided near the middle of the processing chamber body 100; the partition plate 150 is a hard plate body, which is vertically arranged to divide the internal space of the processing chamber body 100 into two; a through opening for the filter belt group to pass through is provided on the partition plate 150; a sealing brush 140 is also provided on the through opening.

[0104] For the convenience of description, the two spaces in the processing chamber 100 are defined as a first chamber and a second chamber respectively;

[0105] The first bin is closer to the output bin 300 than the second bin;

[0106] The airflow channel tube 130 is positioned in the first compartment;

[0107] The pump air component 151 connects the first chamber body and the second chamber body through a pipeline; the pump air component 151 is an air pump;

[0108] The second warehouse body has a built-in expansion channel tube 152; the structure of the expansion channel tube 152 is the same as that of the airflow channel tube 130; the dust filter belt 530 covers the top of the airflow channel tube 130 and the expansion channel tube 152; the expansion channel tube 152 is connected to the air output tube 153; one end of the air output tube 153 is connected to the expansion channel tube 152, and the other end leads to the outside of the processing warehouse body 100.

[0109] During use, the smoke enters the first chamber through the air flow channel tube 130 , is pumped into the second chamber through the pump gas assembly 151 , then enters the expansion channel tube 152 in the second chamber, and is finally output through the gas output pipe 153 .

[0110] Embodiment 3

[0111] In order to further improve the practicality of the present application, and further reduce the maintenance frequency and maintenance cost, the present embodiment optimizes and improves the structure of the dust filter belt 530 on the basis of the above embodiment, specifically:

[0112] like Fig.10 As shown, the dust filter belt 530 is provided with a rectangular block-shaped cleaning area 531; the cleaning area 531 is densely covered with brush hairs;

[0113] During the flue gas treatment interval, the operation of the dust filter belt assembly is controlled so that the dust filter belt 530 and the carrier body 411 move at a differential speed and the cleaning area 531 moves back and forth on the top surface of the airflow channel tube 130 to scrub the top exhaust groove 131 and the bottom of the carrier body 411 at the bottom, and then cooperate with the cleaning tube 160 to self-clean the airflow channel tube 130.

[0114] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns, characterized by: It comprises a processing chamber (100), a filter belt group, and a dust filter belt assembly; The processing warehouse (100) is provided with a material adding warehouse (200) with a built-in adding component (210) on one side, and an output warehouse (300) on the other side. The top is provided with an exhaust port (120) and a built-in airflow channel pipe (130); the airflow channel pipe (130) is a horizontally placed hard pipe with a flat top surface, connected to the air injection pipe (110), and provided with a row of top exhaust grooves (131) on the top surface; The two ends of the filter belt group are respectively located in the feeding bin (200) and the output bin (300), penetrate into the processing bin (100) and are arranged horizontally in the processing bin (100), and include a first carrier assembly (410) and a second carrier assembly (420); the first carrier assembly (410) and the second carrier assembly (420) have the same structure, are stacked together, and are both in the shape of a scroll as a whole. They are attached together in the processing bin (100) and form a strip space; the adding assembly (210) adds filler (401) on the second carrier assembly (420); the dust filter belt assembly is a horizontal scroll-shaped filter structure, which is used to filter dust in the smoke, is tightly attached to the top of the airflow channel tube (130) and is pressed underneath by the second carrier assembly (420).

2. The flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns according to claim 1, characterized in that: The feeding bin body (200) is closely attached to the output bin body (300) and the processing bin body (100); a through-port is provided on the side wall of the processing bin body (100) close to the feeding bin body (200), and a through-out is provided on the side wall close to the output bin body (300); the through-port and the through-in are horizontally placed rectangular through grooves for the filter belt group to pass through; the through-port and the through-in are both provided with multiple rows of brushes; The top exhaust groove (131) is a rectangular through groove, and the length direction is the same as the width direction of the airflow channel tube (130).

3. The flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns as claimed in claim 2, characterized in that: The first carrier tape assembly (410) comprises a carrier tape body (411), a side assembly strip (412), a rear reel (413) and a front reel (414); The carrier body (411) is in a belt shape as a whole and is densely covered with through holes; The side assembly strip (412) is a hose, fixed to the two side edges of the carrier body (411) and having the same length as the carrier body (411), and filled with metal and / or non-metal; The rear reel (413) and the front reel (414) are both horizontally arranged hoisting structures, and are respectively positioned in the feeding bin body (200) and the output bin body (300); The widths of the two carrier bodies (411) are different, the width difference is greater than 5 cm, and the width is greater than the length of the top exhaust groove (131) by more than 5 cm.

4. The flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns as claimed in claim 3, characterized in that: The dust filter belt assembly comprises a first reel (510), a second reel (520) and a dust filter belt (530); the first reel (510) and the second reel (520) are both hoisting structures, respectively positioned in the feeding bin body (200) and the output bin body (300), and used for reeling in and releasing the dust filter belt (530); The dust filter belt (530) is a belt-shaped filter screen, with two ends respectively wound and positioned on the first reel (510) and the second reel (520), and a width greater than the width of the carrier body (411); the bottom surface of the dust filter belt (530) is in close contact with the top surface of the carrier body (411) of the second carrier assembly (420); The dust filter belt (530) passes through the through-inlet and the through-outlet, and its bottom covers and is closely attached to the top of the airflow channel tube (130) and slides thereon.

5. The flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns as claimed in claim 4, characterized in that: A cleaning component (220) and a dredging rotating column (230) are positioned in the feeding bin body (200) and / or the output bin body (300); The cleaning component (220) and the dredging rotating column (230) are closely attached to the dust filter belt (530); the dredging rotating column (230) is a horizontally placed cylinder with needle-shaped protrusions densely distributed on the side wall, and the dredging rotating column (230) dredges the filter holes on the dust filter belt (530) when the dust filter belt (530) moves; The cleaning component (220) is a row of gas nozzles and / or liquid nozzles, which clear and clean the filter holes of the dust filter belt (530) by spraying fluid onto the dust filter belt (530).

6. The flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns according to claim 1, characterized in that: The thickness of the filler (401) is more than 5 cm.

7. The flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns according to claim 1 or 3, characterized in that: Also included is an expanded filter belt assembly (402); The structure of the expanded filter belt group (402) is the same as that of the filter belt group, and is stacked on top of the filter belt group; The activated carbon particles in the expanded filter belt group (402) are the same size or different from the activated carbon particles in the filter belt group; There is a separate add-on assembly (210) for feeding the expanded filter belt assembly (402); During use, the filter belt set and the expansion filter belt set (402) move synchronously or asynchronously.

8. The flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns according to any one of claims 1 to 6, characterized in that: A partition plate (150) is provided near the middle of the processing chamber (100); The partition plate (150) is a hard plate body, which is arranged vertically and divides the internal space of the processing chamber (100) into two parts; the partition plate (150) is provided with a through hole for the filter belt group to pass through; The two spaces are respectively a first warehouse body and a second warehouse body; the first warehouse body is closer to the output warehouse body (300) than the second warehouse body; the airflow channel tube (130) is positioned in the first warehouse body; The pump air assembly (151) connects the first chamber body and the second chamber body through a pipeline; The second chamber body has a built-in expansion channel tube (152); The structure of the expansion channel tube (152) is the same as that of the airflow channel tube (130); The expansion channel tube (152) is in communication with the gas output tube (153); one end of the gas output tube (153) is in communication with the expansion channel tube (152), and the other end leads to the outside of the processing chamber (100).

9. The flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns as claimed in claim 4, characterized in that: The dust filter belt (530) is provided with a rectangular block-shaped cleaning area (531); the cleaning area (531) is densely covered with brush hairs; During the flue gas treatment interval, the dust filter belt assembly is controlled to operate so that the dust filter belt (530) and the carrier body (411) move at a differential speed and the cleaning area (531) moves back and forth on the top surface of the airflow channel tube (130) to scrub the top exhaust groove (131) and the bottom of the carrier body (411) at the bottom.

10. The method for using the flue gas filtration desulfurization and denitrification equipment according to claim 1, characterized in that: The flue gas filtration, desulfurization and denitrification equipment suitable for cement kilns as claimed in claim 4 is provided; the steps are as follows: Step 1: first, controlling the adding component (210) to operate to transport the filler (401) onto the carrier body (411) of the second carrier component (420); Step 2: simultaneously controlling all the rear reels (413), the front reels (414), the first reel (510) and the second reel (520) to rotate synchronously at the same speed, so that the filler (401) is spread on the carrier body (411) in the material filling bin body (200) to form an activated carbon layer; and the activated carbon layer moves at a uniform speed on the airflow channel tube (130); Step 3: pumping the flue gas after waste heat recovery into the gas injection pipe (110) so that the flue gas enters the air flow channel pipe (130); filtering the flue gas through the dust filter belt (530) and then filtering and adsorbing the flue gas through the activated carbon layer; Step 4: flexibly adjusting the moving speed of the carrier body (411) according to the concentration of the flue gas to be treated; Step 5: After the carrier body (411) moves to the output bin (300), the activated carbon carried thereon falls naturally under its own weight; Step 6: After a certain amount of activated carbon accumulates in the output bin (300), the adsorption condition of the used activated carbon is determined by observing the color change, and whether it can be reused is determined based on the adsorption condition; if it can be reused, it is stirred and mixed and then placed in the addition component (210) for reuse, or mixed with new activated carbon and reused.

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