A flue gas filtering desulfurization and denitrification equipment and method suitable for a cement kiln

Abstract

This application discloses a flue gas filtration desulfurization and denitrification device and method suitable for cement kilns, relating to the field of filtration equipment technology. This application optimizes and improves the structure of existing low-sulfur flue gas desulfurization, denitrification, and dust removal devices for cement kiln tails. The supporting shell is optimized into a horizontally placed processing chamber, and the multiple internal air guide pipes are optimized into horizontally placed rigid square pipes with the air outlets located at the top of the pipes. This achieves the following technical effects: simple and convenient replacement of consumables for flue gas filtration desulfurization and denitrification equipment suitable for cement kilns; high activated carbon utilization rate; good filtration effect on flue dust; strong stability and continuity of adsorption and filtration effects; small size; less likelihood of activated carbon falling off, leading to severely thin or even completely missing activated carbon layers in some areas; good stability during activated carbon layer movement; thicker activated carbon layer; and relatively less wear and a longer service life of the filter belt during use.

Description

Technical Field

[0001] This invention relates to the field of filtration equipment technology, and in particular to a flue gas filtration, desulfurization, and denitrification equipment and method suitable for cement kilns. Background Technology

[0002] With increasingly stringent environmental protection requirements, flue gas desulfurization at the tail of cement kilns has become a common practice. Generally, activated carbon adsorption is chosen as a dry desulfurization method, which can also achieve a certain degree of denitrification while desulfurizing.

[0003] In existing dry flue gas desulfurization and denitrification devices, the activated carbon remains stationary during the desulfurization and denitrification process, and the flue gas cannot effectively contact the unsaturated activated carbon, resulting in mediocre desulfurization and denitrification effects.

[0004] To address the aforementioned issues, Chinese invention patent CN118416612B discloses a desulfurization, denitrification, and dust removal device and method for low-sulfur flue gas at the tail of a cement kiln. By optimizing and improving the structure of existing low-sulfur flue gas desulfurization, denitrification, and dust removal devices, a first filter belt assembly and a second filter belt assembly, both with densely packed mesh, are combined to form an activated carbon storage container for flue gas filtration and adsorption. A cylindrical wheel with densely packed spikes serves as a guide wheel for the first and second filter belt assemblies to achieve a clearing effect. The first and second filter belt assemblies within the supporting housing are spring-shaped under the guidance of the cylindrical wheel. During use, the flue gas is guided through the first and second filter belt assemblies for treatment.

[0005] While the above-mentioned solution achieves the advantages of simple consumable replacement, convenient maintenance, full utilization of activated carbon, easy cleaning, less clogging of mesh, good filtration effect on flue gas, and strong stability and continuity of adsorption and filtration effects in the desulfurization, denitrification and dust removal device for low-sulfur flue gas at cement kiln tail, the overall size of the equipment is relatively large. The combination of the first and second filter belt components relies on magnetic force, which can cause local activated carbon to fall off during repeated reversal movements (leading to severely thin or even completely missing activated carbon layers in some areas). Due to its own structural limitations, the thickness of activated carbon that can be accommodated between the first and second filter belt components is relatively thin (the filtration and desulfurization and denitrification effects of a thinner activated carbon layer are relatively poor compared to a thicker activated carbon layer). The flue gas channel structure is relatively complex, the flue gas channel is relatively difficult to maintain, and there is more friction and wear between the first and second filter belt components and the flue gas channel during operation, which affects the overall service life of the first and second filter belt components and increases the number of maintenance and maintenance costs.

[0006] Therefore, there is a need for a flue gas filtration, desulfurization, and denitrification equipment suitable for cement kilns, which features easy and convenient consumable replacement, high activated carbon utilization, good filtration effect on flue gas and dust, strong stability and continuity of adsorption and filtration effect, small size, low risk of activated carbon falling off and causing severe thinning or even complete loss of activated carbon layer in local areas, good stability during activated carbon layer movement, thick activated carbon layer, relatively low wear during use, and relatively long service life. Summary of the Invention

[0007] This application provides a flue gas filtration desulfurization and denitrification device suitable for cement kilns, solving the problems of existing flue gas filtration desulfurization and denitrification devices, such as large size, easy occurrence of severely thin or even completely missing activated carbon layers in some areas, poor stability during activated carbon layer movement, thin activated carbon layer thickness, relatively large wear and relatively short service life of filter belts during use. The device achieves the following technical effects: simple and convenient replacement of consumables, high activated carbon utilization rate, good filtration effect on flue dust, strong stability and continuity of adsorption and filtration effects, small size, less likelihood of activated carbon falling off and causing severely thin or even completely missing activated carbon layers in some areas, good stability during activated carbon layer movement, thicker activated carbon layer, relatively less wear and relatively long service life of filter belts during use.

[0008] This application provides a flue gas filtration, desulfurization, and denitrification device suitable for cement kilns, including a treatment chamber, a filter belt assembly, and a dust filter belt component;

[0009] The processing chamber has a feeding chamber with built-in feeding components on one side and an output chamber on the other side. It has an exhaust port on the top and an airflow channel pipe built in. The airflow channel pipe is a horizontal rigid pipe with a flat top surface, which is connected to the air injection pipe. A row of top exhaust grooves is provided on the top surface.

[0010] The filter belt assembly has two ends located in the feeding chamber and the output chamber, respectively. It is inserted into the processing chamber and arranged horizontally in the processing chamber. It includes a first carrier belt assembly and a second carrier belt assembly. The first carrier belt assembly and the second carrier belt assembly have the same structure and are stacked together. They are both in the shape of a roll and are attached together in the processing chamber to form a strip-shaped space. The adding component adds filler to the second carrier belt assembly.

[0011] The dust filter belt assembly is a horizontally placed, roll-shaped filter structure used to filter dust in flue gas. It is attached tightly to the top of the airflow channel pipe and pressed down by the second carrier belt assembly.

[0012] Furthermore, the feeding chamber is closely attached to the output chamber and the processing chamber; the processing chamber has an inlet on the side wall near the feeding chamber and an outlet on the side wall near the output chamber; the inlet and outlet are horizontal rectangular channels for the filter belt assembly to pass through; multiple rows of brushes are provided on both the inlet and outlet.

[0013] The top exhaust groove is a rectangular through groove, with its length direction being the same as the width direction of the airflow channel pipe.

[0014] Furthermore, both the first carrier tape assembly and the second carrier tape assembly include a carrier tape body, side combination strips, a rear spool, and a front spool;

[0015] The carrier tape is generally strip-shaped and densely covered with through holes;

[0016] The side assembly strip is a flexible tube, fixed to both sides of the carrier tape and of the same length as the carrier tape, and filled with metal and / or non-metal.

[0017] Both the rear drum and the front drum are horizontally arranged hoisting structures, respectively positioned inside the feeding hopper and the output hopper.

[0018] The two carrier belts have different widths, with a width difference greater than 5 cm, and the width is more than 5 cm greater than the length of the top exhaust groove.

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

[0020] The dust filter belt is a strip filter screen, with both ends wound and positioned on the first and second rolls respectively, and its width is greater than the width of the carrier belt; the top surface of the dust filter belt is in close contact with the bottom surface of the carrier belt of the second carrier belt assembly;

[0021] The dust filter belt runs through the inlet and outlet, covers the bottom of the airflow channel tube and slides on it.

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

[0023] The cleaning components and the unblocking rotating column are closely attached to the dust filter belt; the unblocking rotating column is a horizontally placed cylinder with dense needle-like protrusions on its side wall. When the dust filter belt moves, the unblocking rotating column unblocks the filter holes on it.

[0024] The cleaning component is a row of gas nozzles and / or liquid nozzles that unclog and clean the filter pores by spraying fluid into the dust filter belt.

[0025] Furthermore, the thickness of the filler is 5 centimeters or more.

[0026] Preferably, it also includes an extended filter belt assembly;

[0027] The structure of the extended filter belt assembly is the same as that of the filter belt assembly, and it is stacked on top of the filter belt assembly.

[0028] The activated carbon particles in the extended filter belt assembly may be the same size or different from the activated carbon particles in the filter belt assembly.

[0029] There is a separate add-on component for feeding extended filter belt assemblies;

[0030] During use, the filter belt assembly and the extended filter belt assembly move synchronously or asynchronously.

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

[0032] The partition is a rigid plate, vertically installed, which divides the internal space of the processing chamber into two parts; the partition has through openings for the filter belt assembly to pass through;

[0033] The two spaces are designated as the first compartment and the second compartment; the first compartment is closer to the output compartment than the second compartment.

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

[0035] The air pump assembly connects the first and second chambers via a pipeline;

[0036] The second compartment has a built-in expansion channel pipe;

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

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

[0039] Preferably, the dust filter belt has rectangular cleaning zones; the cleaning zones are densely covered with brush bristles;

[0040] During the flue gas treatment interval, the operation of the dust filter belt assembly is controlled to make the dust filter belt and the carrier belt move at different speeds, and the cleaning zone moves back and forth on the top surface of the airflow channel pipe, thereby brushing the top exhaust chute and the bottom of the carrier belt located at the bottom.

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

[0042] By optimizing and improving the structure of existing low-sulfur flue gas desulfurization, denitrification, and dust removal devices in cement kiln tails, the supporting shell is optimized into a horizontally placed treatment chamber, and the multiple internal air guide pipes are optimized into horizontally placed rigid square tubes with the air outlets located at the top of the tubes. Two horizontally placed filter belts, each containing an activated carbon layer, are placed on top of the rigid square tubes, and their movement is controlled by roller winding and releasing. Under the influence of gravity, the edges of the two filter belts are tightly adhered together without the need for large-angle bending. In use, the flue gas to be treated is passed into the rigid square tube, allowing it to pass through the filter belts and activated carbon layer before exiting from the treatment chamber. This effectively solves the problems of large size and susceptibility to localized displacement issues in existing gas filtration desulfurization and denitrification equipment. This technology addresses issues such as severely thin or completely missing activated carbon layers, poor stability during activated carbon layer movement, thin activated carbon layer thickness, and relatively high wear and short service life of the filter belt. Furthermore, it achieves the following technical advantages for flue gas filtration, desulfurization, and denitrification equipment suitable for cement kilns: simple and convenient consumable replacement, high activated carbon utilization rate, good filtration effect on flue dust, strong stability and continuity of adsorption and filtration effects, small size, less likelihood of activated carbon falling off and causing severely thin or completely missing activated carbon layers in certain areas, good stability during activated carbon layer movement, thicker activated carbon layer, and relatively low wear and long service life of the filter belt. Attached Figure Description

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

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

[0045] Figure 3 A simplified diagram showing the positional relationship between the carrier belt and the filter belt;

[0046] Figure 4 Here is a simplified structural diagram of the filter belt assembly;

[0047] Figure 5 This is a schematic diagram of the external structure of the airflow channel pipe;

[0048] Figure 6 This is a schematic diagram of the airflow channel pipe;

[0049] Figure 7 This is a schematic diagram showing the layout relationship between the filter belt assembly and the extended filter belt assembly.

[0050] Figure 8 This is a schematic diagram showing the positional relationship between the filter belt assembly and the extended filter belt assembly;

[0051] Figure 9 A simplified structural diagram of a processing compartment equipped with partitions;

[0052] Figure 10 This is a schematic diagram showing the layout of the cleaning zones on the dust filter belt.

[0053] In the picture:

[0054] Processing chamber 100, air injection pipe 110, exhaust port 120, airflow channel pipe 130, top exhaust groove 131, side baffle 132, top protrusion 133, sealing brush 140, partition plate 150, air pump assembly 151, expansion channel pipe 152, air output pipe 153, cleaning pipe 160, feeding chamber 200, adding assembly 210, cleaning assembly 220, unblocking rotating column 230, output chamber 300, reversing wheel 301, filler 401, expansion filter belt assembly 402, first carrier belt assembly 410, carrier belt body 411, side combination bar 412, rear drum 413, front drum 414, second carrier belt assembly 420, first drum 510, second drum 520, dust filter belt 530, cleaning area 531. Detailed Implementation

[0055] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

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

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0058] Example 1

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

[0060] The processing chamber 100 is used for filtering flue gas and desulfurization and denitrification. It is a horizontally placed rectangular block chamber with a feeding chamber 200 on one side and an output chamber 300 on the other side. The feeding chamber 200, output chamber 300 and processing chamber 100 are closely attached together. The processing chamber 100 has an inlet on the side wall near the feeding chamber 200 and an outlet on the side wall near the output chamber 300. The inlet and outlet are horizontally placed rectangular channels for the filter belt assembly to pass through. Both the inlet and outlet are equipped with sealing brushes 140. The sealing brushes 140 are a combination of multiple rows of brushes. The brush bristles are in close contact with the filter belt assembly, which not only cleans the filter belt assembly but also seals the inlet and outlet.

[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 100 has an internal airflow channel pipe 130; the airflow channel pipe 130 is a horizontally placed rigid square tube with a flat top surface and a row of top exhaust slots 131 on the top surface; the length direction of the airflow channel pipe 130 is the same as the length direction of the processing chamber 100 and the top surface is at the same height as the inlet and outlet.

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

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

[0065] The feeding hopper 200 has a built-in feeding component 210; the feeding component 210 is used to add activated carbon to the filter belt group in the feeding hopper 200 in a timed and quantitative manner. The whole is a combination of activated carbon storage hopper and material distribution and blocking mechanism. It operates under the control of the control unit and discharges activated carbon downward in a timed and quantitative manner, which is the prior art.

[0066] The output chamber 300 acts as a container and has multiple reversing wheels 301 built in for guiding the direction of the components of the filter belt assembly; the reversing wheels 301 are roller-shaped wheels.

[0067] The filter belt assembly is used to carry activated carbon participating in flue gas treatment and to desulfurize and denitrify the flue gas. Its two ends are located in the feeding hopper 200 and the output hopper 300, respectively. It passes through the treatment hopper 100 and is arranged horizontally in the treatment hopper 100. It includes a first carrier belt assembly 410 and a second carrier belt assembly 420.

[0068] The first carrier assembly 410 and the second carrier assembly 420 have the same structure, both being in the shape of a roll. They are attached together inside the processing chamber 100 to form a strip-shaped space, which contains a filler 401; the filler 401 is activated carbon granules.

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

[0070] The carrier tape 411 is generally tape-shaped with densely distributed through holes, and is made of thin metal tape or high-temperature cloth material.

[0071] The side assembly strip 412 is a long strip tube or metal hose made of high-temperature cloth, fixed to both sides of the carrier 411 and of the same length as the carrier 411, and filled with magnets, metal and / or non-metals; the filling material in the side assembly strip 412 is granules and / or powder.

[0072] The presence of the filler in the side combination strip 412 serves as a counterweight, making the carrier body 411 of the first carrier assembly 410 and the second carrier assembly 420 more flat and ensuring that the carrier body 411 of the two are more closely fitted during movement.

[0073] Both the rear drum 413 and the front drum 414 are horizontally arranged hoisting structures that operate under the control of the control unit to wind up and release the carrier belt 411, which is respectively positioned in the feeding bin 200 and the output bin 300; the two ends of the carrier belt 411 are respectively wound and positioned on the rear drum 413 and the front drum 414.

[0074] The rear rollers 413 inside the feeding bin 200 are of equal height and spaced more than 30 cm apart, and the output port of the adding component 210 is located between the two rear rollers 413.

[0075] The rear drum 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 top of the carrier body 411 of the second carrier assembly 420; the two carrier bodies 411 have different widths, with a width difference 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 has a roll-shaped structure for filtering dust in flue gas. Its width is greater than that of the first carrier belt assembly 410 and the second carrier belt assembly 420, and it is always located below the two, with its top touching the bottom of the second carrier belt assembly 420.

[0077] The dust filter belt assembly includes a first drum 510, a second drum 520, and a dust filter belt 530. Both the first drum 510 and the second drum 520 are hoisting structures, respectively positioned in the feeding hopper 200 and the output hopper 300, for winding and releasing the dust filter belt 530. The dust filter belt 530 is a strip-shaped filter screen, with both ends wound and positioned on the first drum 510 and the second drum 520, respectively, and its width is greater than the width of the carrier belt 411. The top surface of the dust filter belt 530 is in close contact with the bottom surface of the carrier belt 411 of the second carrier belt assembly 420.

[0078] like Figure 3 As shown, the dust filter belt 530 passes through the inlet and outlet, and its bottom covers and adheres tightly to the top of the airflow channel pipe 130 and slides thereon.

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

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

[0081] like Figure 3 As shown, preferably, the carrier 411 is provided with multiple separator strips; the separator strips have a separating effect, reducing the probability of local aggregation of activated carbon.

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

[0083] Preferably, the widths of the different top exhaust grooves 131 are different, with the top exhaust grooves 131 farther away from the air injection pipe 110 being larger.

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

[0085] Preferably, the top surface of the airflow channel pipe 130 is provided with a plurality of top protrusions 133, the top protrusions 133 are hemispherical blocks with smooth tops and diameters smaller than the width of the top exhaust groove 131; when the filter belt assembly moves on the airflow channel pipe 130, the activated carbon inside it is turned over by the top protrusions 133.

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

[0087] Preferably, the airflow channel pipe 130 has multiple built-in air guide pipes; the air guide pipes are rigid pipes arranged at an angle, and the top is connected to the top exhaust groove 131; after the flue gas enters the airflow channel pipe 130, it is blown out at an angle from the top exhaust groove 131, so as to have more sufficient contact with the activated carbon.

[0088] Furthermore, the thickness of the filler 401 is 5 cm or more.

[0089] The power unit 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. The control unit plays the role of 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 for cement kilns in this application embodiment is used:

[0092] 1. First, control the adding component 210 to deliver filler 401 to the carrier tape 411 of the second carrier tape assembly 420;

[0093] 2. Simultaneously control all rear drums 413, front drums 414, first drum 510 and second drum 520 to rotate synchronously and at the same speed, so that the filler 401 is laid flat on the carrier 411 in the filling bin 200 to form an activated carbon layer; and make the activated carbon layer move at a uniform speed on the airflow channel pipe 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 airflow channel pipe 130; so that the flue gas passes through the dust filter belt 530 and then through the activated carbon layer for filtration and adsorption.

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

[0096] 5. After the carrier tape 411 moves to the output chamber 300, the activated carbon it carries will fall off naturally under its own weight; (before the tape on the rear drum 413 is fully released, the adding component 210 stops running, and the carrier tape 411 is rewound after the filler 401 on the carrier tape 411 is fully released).

[0097] 6. After a certain amount of activated carbon accumulates in the output chamber 300, the adsorption status of the activated carbon after use is determined by observing color changes and other methods. Based on the adsorption status, it is determined whether it can be reused. If it is to be reused, it is stirred and mixed and then placed into the addition component 210 for reuse. Alternatively, it can be mixed with new activated carbon and reused.

[0098] Preferred, such as Figure 8 and Figure 9 As shown, it also includes an extended filter belt assembly 402; the structure of the extended filter belt assembly 402 is the same as that of the filter belt assembly, and it is stacked on top of the filter belt assembly; the activated carbon particles in the extended filter belt assembly 402 are the same size or different from the activated carbon particles in the filter belt assembly; there is an independent feeding component 210 to supply material to the extended filter belt assembly 402; during use, the filter belt assembly and the extended filter belt assembly 402 move synchronously or asynchronously; stacking can achieve better adsorption and filtration effect; during asynchronous movement, it plays a certain role in guiding the airflow direction, and during asynchronous (misaligned) movement, it also plays a certain role in unblocking the pores due to mutual friction.

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

[0100] This invention addresses the shortcomings of existing flue gas filtration desulfurization and denitrification equipment, such as large size, tendency for localized areas to have severely thin or even completely missing activated carbon layers, poor stability during activated carbon layer movement, thin activated carbon layer thickness, and relatively high wear and short service life of the filter belt. It achieves the following advantages for cement kiln flue gas filtration desulfurization and denitrification equipment: simple and convenient consumable replacement, high activated carbon utilization rate, good filtration effect on flue dust, strong stability and continuity of adsorption and filtration effects, smaller size, less likelihood of activated carbon falling off and causing severely thin or even completely missing activated carbon layers, good stability during activated carbon layer movement, thicker activated carbon layer, and relatively less wear and a longer service life of the filter belt.

[0101] Example 2

[0102] To achieve better filtration and adsorption effects and more thorough treatment of flue gas, this application embodiment optimizes and improves the structure of the treatment chamber 100 based on the above embodiments, specifically as follows:

[0103] like Figure 9As shown, the processing chamber 100 is provided with a partition plate 150 near the middle; the partition plate 150 is a rigid plate, vertically arranged, which 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 assembly to pass through; the through-hole is also provided with a sealing brush 140.

[0104] For ease of description, the two spaces within the processing compartment 100 will be defined as the first compartment and the second compartment, respectively.

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

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

[0107] The air pump assembly 151 connects the first chamber and the second chamber via a pipeline; the air pump assembly 151 is an air pump.

[0108] The second chamber has an internal expansion channel pipe 152; the structure of the expansion channel pipe 152 is the same as that of the airflow channel pipe 130; the dust filter belt 530 covers the top of the airflow channel pipe 130 and the expansion channel pipe 152; the expansion channel pipe 152 is connected to the air output pipe 153; one end of the air output pipe 153 is connected to the expansion channel pipe 152, and the other end leads to the outside of the processing chamber 100.

[0109] During use, the flue gas enters the first chamber through the airflow channel pipe 130, is pumped into the second chamber through the pumping assembly 151, then enters the expansion channel pipe 152 in the second chamber, and finally exits through the gas output pipe 153.

[0110] Example 3

[0111] To further improve the practicality of this application and reduce maintenance frequency and cost, the embodiments of this application optimize and improve the structure of the dust filter belt 530 based on the above embodiments, specifically as follows:

[0112] like Figure 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 bristles;

[0113] During the flue gas treatment interval, the operation of the dust filter belt assembly is controlled to make the dust filter belt 530 and the carrier belt 411 move at a different speed, and the cleaning area 531 moves back and forth on the top surface of the airflow channel pipe 130, thereby brushing the top exhaust groove 131 and the bottom of the carrier belt 411 located at the bottom, and then cooperating with the cleaning pipe 160 to perform self-cleaning of the airflow channel pipe 130.

[0114] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A flue gas filtration, desulfurization, and denitrification device suitable for cement kilns, characterized in that: Includes a processing chamber (100), a filter belt assembly, and a dust filter belt component; The processing chamber (100) has a feeding chamber (200) with a built-in feeding component (210) on one side and an output chamber (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 horizontal rigid pipe with a flat top surface, which is connected to the air injection pipe (110). A row of top exhaust grooves (131) is provided on the top surface. The two ends of the filter belt assembly are located in the feeding chamber (200) and the output chamber (300) respectively, and are inserted into the processing chamber (100) and arranged horizontally in the processing chamber (100). It includes a first carrier belt assembly (410) and a second carrier belt assembly (420). The first carrier belt assembly (410) and the second carrier belt assembly (420) have the same structure and are stacked together. They are both in the shape of a roll and are attached together in the processing chamber (100) to form a strip-shaped space. The adding component (210) adds filler (401) to the second carrier belt assembly (420). The dust filter belt assembly is a horizontally placed roller-shaped filter structure used to filter dust in flue gas. It is attached to the top of the airflow channel pipe (130) and pressed down by the second carrier belt assembly (420). The feeding hopper (200) is in close contact with the output hopper (300) and the processing hopper (100); the processing hopper (100) has an inlet on the side wall near the feeding hopper (200) and an outlet on the side wall near the output hopper (300); the inlet and outlet are horizontal rectangular channels for the filter belt assembly to pass through; multiple rows of brushes are provided on both the inlet and outlet. 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 pipe (130); The first carrier tape assembly (410) and the second carrier tape assembly (420) both include a carrier tape body (411), a side combination strip (412), a rear drum (413) and a front drum (414); The carrier tape (411) is generally tape-shaped and densely covered with through holes; The side assembly strip (412) is a flexible tube, fixed to both sides of the carrier tape (411) and of the same length as the carrier tape (411), and is filled with metal and / or non-metal. The rear drum (413) and the front drum (414) are both horizontally arranged hoisting structures, respectively located in the feeding bin (200) and the output bin (300); The two carrier belts (411) have different widths, with a width difference of more than 5 cm, and the width is more than 5 cm greater than the length of the top exhaust groove (131).

2. The flue gas filtration, desulfurization, and denitrification equipment for cement kilns as described in claim 1, characterized in that: The dust filter belt assembly includes a first drum (510), a second drum (520), and a dust filter belt (530); the first drum (510) and the second drum (520) are both hoisting structures, respectively positioned in the feeding hopper (200) and the output hopper (300), for winding and releasing the dust filter belt (530); The dust filter belt (530) is a strip filter screen, with both ends wound and positioned on the first roll (510) and the second roll (520) respectively, and its width is greater than the width of the carrier belt (411); the top surface of the dust filter belt (530) is in close contact with the bottom surface of the carrier belt (411) of the second carrier belt assembly (420); The dust filter belt (530) passes through the inlet and outlet, and its bottom covers and adheres closely to the top of the airflow channel tube (130) and slides thereon.

3. The flue gas filtration, desulfurization, and denitrification equipment for cement kilns as described in claim 2, characterized in that: A cleaning component (220) and a dredging rotating column (230) are positioned in the feeding hopper (200) and / or the output hopper (300); The cleaning component (220) and the unblocking rotating column (230) are closely attached to the dust filter belt (530); the unblocking rotating column (230) is a horizontally placed cylinder with dense needle-like protrusions on its side wall. When the dust filter belt (530) moves, the unblocking rotating column (230) unblocks the filter holes on it. The cleaning component (220) is a row of gas nozzles and / or liquid nozzles that cleans and unblocks the filter holes of the dust filter belt (530) by spraying fluid into it.

4. The flue gas filtration, desulfurization, and denitrification equipment for cement kilns as described in claim 1, characterized in that: The thickness of the filler (401) is 5 cm or more.

5. The flue gas filtration, desulfurization, and denitrification equipment for cement kilns as described in claim 1, characterized in that: It also includes an extended filter belt assembly (402); The structure of the extended filter belt assembly (402) is the same as that of the filter belt assembly, and it is stacked on top of the filter belt assembly; The activated carbon particles in the extended filter belt assembly (402) may be the same size or different in size from the activated carbon particles in the filter belt assembly; There is a separate feeder assembly (210) for feeding the extended filter belt assembly (402); During use, the filter belt assembly and the extended filter belt assembly (402) move synchronously or asynchronously.

6. The flue gas filtration, desulfurization, and denitrification equipment suitable for cement kilns as described in any one of claims 1 to 4, characterized in that: The processing chamber (100) is provided with a partition plate (150) near the middle; The partition plate (150) is a rigid plate, vertically arranged, which 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 assembly to pass through; The two spaces are the first compartment and the second compartment, respectively; the first compartment is closer to the output compartment (300) than the second compartment; The airflow channel pipe (130) is positioned in the first compartment; The air pump assembly (151) connects the first chamber and the second chamber via a pipe; The second compartment has a built-in expansion channel pipe (152); The structure of the expansion channel tube (152) is the same as that of the airflow channel tube (130); The expansion channel pipe (152) is connected to the gas output pipe (153); one end of the gas output pipe (153) is connected to the expansion channel pipe (152), and the other end leads to the outside of the processing chamber (100).

7. The flue gas filtration, desulfurization, and denitrification equipment for cement kilns as described in claim 2, 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 bristles; During the flue gas treatment interval, the operation of the dust filter belt assembly is controlled to cause the dust filter belt (530) and the carrier belt (411) to move at different speeds and cause the cleaning zone (531) to move back and forth on the top surface of the airflow channel pipe (130) to brush the top exhaust groove (131) and the bottom of the carrier belt (411) located at the bottom.

8. The method of using the flue gas filtration desulfurization and denitrification equipment as described in claim 1, characterized in that: The equipment is equipped with the flue gas filtration, desulfurization, and denitrification device for cement kilns as described in claim 2; the steps are as follows: Step 1: First, control the adding component (210) to deliver filler (401) to the carrier tape (411) of the second carrier tape assembly (420); Step 2: Simultaneously control all rear drums (413), front drums (414), first drum (510), and second drum (520) to rotate synchronously and at the same speed, so that the filler (401) is spread flat on the carrier (411) in the filling bin (200) to form an activated carbon layer; and make the activated carbon layer move at a uniform speed on the airflow channel pipe (130); Step 3: Pump the flue gas after waste heat recovery into the gas injection pipe (110) so that the flue gas enters the airflow channel pipe (130); so that the flue gas passes through the dust filter belt (530) for dust filtration and adsorption through the activated carbon layer; Step 4: Adjust the moving speed of the carrier (411) flexibly according to the concentration of the flue gas to be treated; Step 5: After the carrier (411) moves to the output chamber (300), the activated carbon it carries falls off naturally under its own weight; Step 6: After a certain amount of activated carbon has accumulated in the output chamber (300), the adsorption status of the activated carbon after use is determined by observing the color change and other methods. Based on the adsorption status, it is determined whether to reuse it. If reuse is desired, the activated carbon is stirred and mixed and then placed into the addition component (210) for reuse, or it is mixed with new activated carbon and reused.

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