Cyclone separation type denitration reactor

Abstract

The utility model discloses a kind of denitration reactors of cyclone separation, belong to flue gas treatment equipment technical field, including reaction tank, accelerate reaction mechanism and dust storage mechanism, the dust storage mechanism includes motor, with the first gear fixed with air outlet pipe, with the second gear fixed with connecting rod and connecting block, motor is driven connecting rod revolution around first gear by connecting plate, simultaneously, second gear and first gear meshing make connecting rod rotate, to drive connecting block to carry out planetary orbit type scraping on the second filter plate of accelerate reaction mechanism, spring and sliding block inside connecting block are equipped with elastic centering structure, so that it is closely attached air outlet pipe stable movement, second filter plate is equipped with reserved mouth, dust storage box is correspondingly arranged below for collecting dust.The utility model realizes automatic, dead angle-free online dust cleaning to filter plate by the above structure, effectively prevents the plugging and deactivation of catalyst, ensures the long-term stable operation of device.

Description

Technical Field

[0001] This utility model relates to flue gas treatment equipment, and more particularly to a cyclone separator denitrification reactor. Background Technology

[0002] With the acceleration of industrialization, the flue gas emitted by coal-fired power plants and industrial boilers contains a large amount of nitrogen oxides and dust. These pollutants have caused serious harm to the environment and human health. In order to meet increasingly stringent environmental regulations, selective catalytic reduction (SCR) denitrification technology has been widely used in the field of flue gas treatment. SCR denitrification technology uses a reducing agent to convert nitrogen oxides into harmless nitrogen and water under the action of a catalyst. It has the advantages of high denitrification efficiency and relatively low operating costs.

[0003] Before entering the denitrification reactor, industrial flue gas usually undergoes dust removal treatment. However, due to the complex composition of the flue gas, the dust removal efficiency is difficult to reach 100%, and a certain amount of fine dust will still enter the reactor with the flue gas. During the flue gas flow, this residual dust is easily deposited on the catalyst surface, causing blockage of the catalyst channels and covering of active sites, thereby reducing the activity of the catalyst and reducing the denitrification efficiency. More seriously, long-term accumulation of dust can also increase the resistance to flue gas flow and even cause local blockage inside the reactor, affecting the normal operation of the equipment.

[0004] To address the problem of dust clogging the catalyst, existing technologies typically involve installing filter plates before the catalyst for secondary dust removal. These filter plates themselves also accumulate a large amount of dust over time, requiring regular cleaning. Traditional cleaning methods often involve manual cleaning or simple mechanical vibration. These methods are not only inefficient and incomplete, but also require machine shutdown during cleaning, affecting the continuous operating efficiency of the equipment. Furthermore, manual cleaning also presents problems such as harsh operating environments and high labor intensity.

[0005] Therefore, this invention proposes a cyclone separation denitrification reactor to address the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing technology of cyclone separator denitrification reactors, such as the dust-laden flue gas easily causing catalyst blockage and deactivation and the inconvenience of dust cleaning, this utility model aims to provide a cyclone separator denitrification reactor with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a cyclone separation denitrification reactor, including a support frame, a reaction tank, an air inlet pipe, an air outlet pipe, an acceleration reaction mechanism, and a dust storage mechanism.

[0008] The dust storage mechanism includes a motor, a connecting plate, a first gear, a second gear, a connecting rod, and a connecting block. The motor is bolted to the upper surface of the reaction vessel. The output end of the motor is fixedly connected to one end of the connecting plate. The first gear, as a central fixed gear, is fixedly connected above the air outlet pipe. The other end of the connecting plate is fixedly connected to the upper end of the connecting rod. The second gear, as a planetary gear, is fixedly connected to the connecting rod, and the teeth of the second gear mesh with the teeth of the first gear. The connecting rod extends vertically downward through the upper surface of the reaction vessel and is fixedly connected to the upper surface of the connecting block. The lower surface of the connecting block is tightly fitted against the upper surface of the second filter plate of the accelerated reaction mechanism.

[0009] Furthermore, the dust storage mechanism also includes a column, a spring, a sliding column, and a sliding block. The column is fixedly connected to the inner wall of the connecting block. The spring is housed inside the column. One end of the spring away from the bottom of the column is fixedly connected to one end of the sliding column. The other end of the sliding column is fixedly connected to the outer wall of the sliding block. The sliding block is slidably connected in the internal cavity of the connecting block. In the assembled state, the spring is always in a pre-compressed state, thereby applying a continuous radial thrust to the sliding block through the sliding column, so that one end of the sliding block can always be tightly attached to the outer wall of the air outlet duct.

[0010] Meanwhile, the dust storage mechanism also includes a dust storage box, which is fixedly connected to the lower part of the second filter plate of the accelerated reaction mechanism. The second filter plate has a reserved opening, and the opening of the dust storage box is aligned with and connected to the reserved opening.

[0011] Preferably, the accelerated reaction mechanism includes a heating plate, a second filter plate, and at least one catalytic plate. The heating plate, the second filter plate, and the at least one catalytic plate are arranged sequentially from top to bottom inside the reaction tank. This layered arrangement allows the flue gas to be fully preheated and pre-filtered before entering the catalytic reaction zone, creating favorable conditions for the subsequent denitrification reaction.

[0012] Preferably, the at least one catalyst plate includes a first catalyst plate, a second catalyst plate, and a third catalyst plate. The first catalyst plate, the second catalyst plate, and the third catalyst plate are sequentially and fixedly installed between the reaction tank and the exhaust pipe along the flue gas flow direction. Specifically, the second catalyst plate is located below the first catalyst plate and above the third catalyst plate. This multi-stage series arrangement of catalyst plates can effectively prolong the contact time between the flue gas and the catalyst, ensuring the full progress of the denitrification reaction, thereby significantly improving the denitrification efficiency.

[0013] Preferably, the accelerated reaction mechanism further includes an annular nozzle located below the second filter plate and above the first catalytic plate. One end of the annular nozzle is fixedly connected to a gas tank via a connecting pipe. The gas tank stores ammonia or urea solution. The annular nozzle sprays the ammonia or urea solution evenly into the flue gas entering the catalytic plate area through a nozzle, providing sufficient reducing agent for the subsequent SCR denitrification reaction, ensuring that the reducing agent and flue gas are fully mixed, and further improving the denitrification efficiency.

[0014] Preferably, a first filter plate is fixedly installed on the inner wall of the air inlet pipe. The first filter plate can effectively intercept larger dust particles in the flue gas, reduce the load on the subsequent second filter plate and catalytic plate, extend their service life, and also help improve the efficiency of cyclone separation, providing a cleaner flue gas inlet for the entire denitrification system.

[0015] Preferably, the connecting rod is provided with a dynamic sealing structure at the penetration points of the upper surface of the reaction vessel and the heating plate. The dynamic sealing structure is preferably a packing seal or a mechanical seal, which can adapt to the rotational movement of the connecting rod while maintaining good sealing performance, effectively preventing the leakage of flue gas and environmental pollution, or the entry of external air and its impact on the internal working conditions of the reactor, thus ensuring the stability and safety of the internal environment of the reactor.

[0016] This utility model has the following beneficial effects: 1. This utility model solves the problem of dust clogging and cleaning difficulties of the filter plate in front of the catalyst in the prior art by setting up a dust storage mechanism composed of a motor, gear system, connecting rod and connecting block. It achieves the technical effect of automatic and dead-angle-free online dust cleaning of the filter plate, effectively prevents catalyst clogging and deactivation, and ensures long-term stable operation of the device.

[0017] 2. This utility model solves the problem of shaking or uneven scraping that may occur in the connecting block due to its complex movement during the dust removal process by setting an elastic centering structure composed of a spring, a sliding column and a sliding block inside the connecting block. It achieves the technical effect of making the connecting block move stably around the air outlet pipe, thereby improving the reliability and thoroughness of the dust removal action.

[0018] 3. This utility model integrates a tangential air inlet cyclone separation structure, a multi-stage catalytic plate, and an automatic dust collection mechanism into the same reaction tank, solving the problems of dispersed structure, large footprint, and poor synergy between dust removal and reaction in traditional denitrification systems. It achieves the technical effects of compact structure, multi-functionality, and high efficiency, realizing effective pre-separation and online cleaning of dust while achieving efficient denitrification. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural schematic diagram of a cyclone separation denitrification reactor proposed in this utility model; Figure 2 This is a schematic diagram of the connecting plate portion of a cyclone separation denitrification reactor proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0020] Legend: 1. Support frame; 2. Reaction vessel; 3. Gas tank; 4. Connecting pipe; 5. Accelerating reaction mechanism; 501. First filter plate; 502. Heating plate; 503. Annular nozzle; 504. Second filter plate; 505. First catalytic plate; 506. Second catalytic plate; 507. Third catalytic plate; 508. Air outlet pipe; 509. Air inlet pipe; 6. Dust storage mechanism; 601. First gear; 602. Connecting plate; 603. Second gear; 604. Connecting rod; 605. Connecting block; 606. Sliding column; 607. Sliding block; 608. Spring; 609. Column; 610. Dust storage box; 611. Motor; 612. Reserved opening. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please refer to Figures 1 to 4 This utility model provides a cyclone separation denitrification reactor, which aims to solve the problems in the prior art where dust-laden flue gas easily leads to catalyst blockage and deactivation, and dust cleaning is inconvenient.

[0023] The cyclone separation denitrification reactor includes a support frame 1 and a reaction tank 2 fixedly connected to the inner wall of the support frame 1. The support frame 1 provides stable structural support for the entire device. The reaction tank 2 serves as the main container for cyclone separation and catalytic reduction reactions. An air inlet pipe 509 is connected to one side of the upper end of the reaction tank 2. The axial direction of the air inlet pipe 509 forms a certain angle with the tangential direction of the reaction tank 2. This arrangement guides the dust-laden flue gas tangentially into the interior of the reaction tank 2 to form a high-speed rotating airflow. An air outlet pipe 508 is also fixedly installed on the inner wall of the reaction tank 2 for discharging the treated clean flue gas.

[0024] The reaction tank 2 is equipped with an acceleration reaction mechanism 5, which includes a heating plate 502, a second filter plate 504 and at least one catalytic plate from top to bottom. The heating plate 502 is used to preheat the incoming flue gas, the second filter plate 504 is used to intercept dust particles after cyclone separation, and the catalytic plate is used to carry out the denitrification reaction.

[0025] The dust collection mechanism 6 includes a drive component located outside the reaction tank 2 and an execution component located inside. The drive component includes a motor 611, a connecting plate 602, a first gear 601, and a second gear 603. The motor 611 is fixedly connected to the upper surface of the reaction tank 2 by bolts, providing a power source for the entire dust removal operation. The output end of the motor 611 is fixedly connected to one end of the connecting plate 602. The first gear 601, as a central fixed gear, is fixedly connected above the air outlet pipe 508. The other end of the connecting plate 602 is fixedly connected to the upper end of the connecting rod 604. The second gear 603, as a planetary gear, is fixedly connected to the connecting rod 604, and the teeth of the second gear 603 mesh with the teeth of the first gear 601. The execution component includes a connecting rod 604 and a connecting block 605. The connecting rod 604 vertically penetrates the upper surface of the reaction tank 2 and the heating plate 502, and is fixedly connected to the upper surface of the connecting block 605. The lower surface of the connecting block 605 is tightly attached to the upper surface of the second filter plate 504.

[0026] To ensure the stability and thoroughness of dust removal, the dust collection mechanism 6 also includes an elastic centering structure and a dust collection structure. The elastic centering structure consists of a column 609, a spring 608, a sliding column 606, and a sliding block 607. The column 609 is fixedly connected to the inner wall of the connecting block 605. The spring 608 is housed inside the column 609 and is in a pre-compressed state. The sliding column 606 applies a continuous radial thrust to the sliding block 607, ensuring that one end of the sliding block 607 is always tightly attached to the outer wall of the air outlet duct 508, providing stable guidance for the rotational movement of the connecting block 605. The dust collection structure includes a reserved opening 612 on the second filter plate 504 and a dust collection box 610 fixedly connected below the second filter plate 504. The dust collection box 610 communicates with the reserved opening 612 and is used to collect the dust that is scraped off.

[0027] Based on the above embodiments, the present invention may further include the following preferred technical solutions: In a preferred embodiment, to improve denitrification efficiency and reaction stability, at least one catalyst plate in the accelerated reaction mechanism 5 includes a first catalyst plate 505, a second catalyst plate 506, and a third catalyst plate 507. The three are sequentially fixed between the reaction tank 2 and the exhaust pipe 508 along the flue gas flow direction. Specifically, the second catalyst plate 506 is located below the first catalyst plate 505 and above the third catalyst plate 507. This multi-stage series arrangement of catalyst plates can prolong the contact time between the flue gas and the catalyst, ensuring the full progress of the denitrification reaction.

[0028] As another preferred embodiment, in order to pretreat the flue gas before the catalytic reaction, the accelerating reaction mechanism 5 also includes an annular nozzle 503. The annular nozzle 503 is located below the second filter plate 504 and above the first catalytic plate 505. One end of the annular nozzle 503 is fixedly connected to the gas tank 3 through a connecting pipe 4. The gas tank 3 stores ammonia or urea solution to provide a reducing agent for the subsequent SCR denitrification reaction.

[0029] In another preferred embodiment, in order to perform preliminary particulate filtration before the flue gas enters the reaction tank 2, a first filter plate 501 is fixedly installed on the inner wall of the air inlet pipe 509. The first filter plate 501 can effectively intercept larger dust particles in the flue gas, reducing the load on the subsequent second filter plate 504 and catalytic plate.

[0030] As another preferred embodiment, in order to ensure the sealing of the connecting rod 604 during rotation, a dynamic sealing structure is provided at the penetration points of the connecting rod 604 with the upper surface of the reaction vessel 2 and the heating plate 502. The dynamic sealing structure is preferably a packing seal or a mechanical seal, which can effectively prevent the leakage of flue gas or the entry of external air to affect the internal working conditions of the reactor.

[0031] The working principle of the cyclone separation denitrification reactor of this utility model is as follows: When flue gas containing nitrogen oxides and dust enters the reactor through the inlet pipe 509, it first undergoes preliminary filtration through the first filter plate 501. Subsequently, the flue gas is heated to the optimal temperature required for the catalytic reaction by the heating plate 502. The heated flue gas enters at high speed along the tangential direction of the reaction tank 2, forming a rotating airflow. Under the action of centrifugal force, dust particles are thrown towards the inner wall and intercepted by the second filter plate 504. The flue gas that has undergone preliminary dust removal passes through the second filter plate 504 and mixes with the reducing agent sprayed from the annular nozzle 503. It continues to flow upward and passes through the first catalytic plate 505, the second catalytic plate 506, and the third catalytic plate 507 in sequence. Under the action of the catalyst, a reduction reaction occurs to generate nitrogen and water. The clean flue gas is finally discharged through the central outlet pipe 508.

[0032] When dust removal is required, the motor 611 starts, and through the planetary gear system composed of the connecting plate 602, the first gear 601 and the second gear 603, the connecting rod 604 rotates while revolving around the sun, thereby driving the connecting block 605 at the bottom to perform a large-scale planetary trajectory scraping on the upper surface of the second filter plate 504, pushing the dust towards the reserved opening 612 and falling into the dust collection box 610, realizing automatic and dead-angle-free online dust removal. Through the synergistic effect of the dust collection mechanism 6 and the acceleration reaction mechanism 5, this utility model solves the problem in the prior art that the catalyst is easily covered by dust, leading to blockage and deactivation.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A cyclone separation denitrification reactor, comprising a support (1) and a reaction tank (2) fixedly connected to the inner wall of the support (1), wherein an air inlet pipe (509) is connected to one side of the upper end of the reaction tank (2), an air outlet pipe (508) is fixedly installed on the inner wall of the reaction tank (2), and an acceleration reaction mechanism (5) is provided inside the reaction tank (2). Its features are, The accelerated reaction mechanism (5) includes a heating plate (502), a second filter plate (504), and at least one catalyst plate; It also includes a dust storage mechanism (6) for cleaning the second filter plate (504); The dust storage mechanism (6) includes a motor (611), a connecting plate (602), a first gear (601), a second gear (603), a connecting rod (604), and a connecting block (605). The motor (611) is fixedly connected to the upper surface of the reaction tank (2). The output end of the motor (611) is fixedly connected to the connecting plate (602). The first gear (601) is fixedly connected above the air outlet pipe (508). The other end of the connecting plate (602) is fixedly connected to the connecting rod (604). The second gear (603) is fixedly connected to the connecting rod (604) and meshes with the first gear (601). The connecting rod (604) passes through the upper surface of the reaction tank (2) and is fixedly connected to the upper surface of the connecting block (605). The connecting block (605) is attached to the upper surface of the second filter plate (504).

2. The cyclone separator denitrification reactor according to claim 1, characterized in that, The dust storage mechanism (6) further includes a column (609), a spring (608), a sliding column (606), and a sliding block (607). The inner wall of the connecting block (605) is fixedly connected to the column (609), and the inner wall of the column (609) is fixedly connected to the spring (608). The other end of the spring (608) is fixedly connected to one end of the sliding column (606), and the other end of the sliding column (606) is fixedly connected to the outer wall of the sliding block (607). The sliding block (607) is slidably connected inside the connecting block (605), and one end of the sliding block (607) is attached to the outer wall of the air outlet pipe (508).

3. The cyclone separator denitrification reactor according to claim 1, characterized in that, The dust storage mechanism (6) further includes a dust storage box (610) and a reserved opening (612). The dust storage box (610) is fixedly connected to the bottom of the second filter plate (504). The reserved opening (612) communicating with the dust storage box (610) is provided on the second filter plate (504).

4. The cyclone separator denitrification reactor according to claim 1, characterized in that, At least one catalyst plate in the accelerated reaction mechanism (5) includes a first catalyst plate (505), a second catalyst plate (506) and a third catalyst plate (507), which are fixedly installed in sequence between the reaction tank (2) and the exhaust pipe (508) along the flue gas flow direction, and the second catalyst plate (506) is located below the first catalyst plate (505) and above the third catalyst plate (507).

5. A cyclone separator denitrification reactor according to claim 4, characterized in that, The accelerated reaction mechanism (5) also includes an annular nozzle (503), which is located below the second filter plate (504) and above the first catalyst plate (505); one end of the annular nozzle (503) is fixedly connected to the gas tank (3) through a connecting pipe (4).

6. A cyclone separator denitrification reactor according to claim 1, characterized in that, The first filter plate (501) is fixedly installed on the inner wall of the air inlet pipe (509).

7. A cyclone separator denitrification reactor according to claim 1, characterized in that, The connecting rod (604) passes through the heating plate (502).

8. A cyclone separator denitrification reactor according to claim 7, characterized in that, The connecting rod (604) and the upper surface of the reaction vessel (2) and the heating plate (502) are all provided with dynamic sealing structures.

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