Single-reactor SCR (Selective Catalytic Reduction) device

Abstract

The utility model belongs to the technical field of flue gas denitration, and discloses a single-reactor SCR (Selective Catalytic Reduction) device which comprises an SCR single reactor, one side of the SCR single reactor is fixedly connected with a flue gas inlet channel, and one side in the flue gas inlet channel is provided with a flue gas impurity removal mechanism; the smoke impurity removing mechanism comprises three sets of conical filter cartridges arranged on one side of the interior of the smoke inlet channel, and compared with the prior art, the smoke impurity removing device has the advantages that by designing the smoke impurity removing mechanism, when smoke enters the smoke inlet channel, the smoke passes through the three sets of vent holes with the hole diameters sequentially reduced from top to bottom, and the smoke impurity removing mechanism is arranged in the smoke inlet channel; impurities in flue gas are filtered for three times, the impurities in the flue gas are effectively filtered out, the impurities are not prone to entering the SCR single reactor to cause blockage, and the impurities can slide to enter the discharging pipe after being blocked on the inner wall of the conical filter cylinder of the conical structure and then enter the impurity collecting box through the guide-in pipe. And rapid separation, cleaning and collection of impurities and flue gas are realized.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas denitrification technology, and specifically relates to a single-reactor SCR device. Background Technology

[0002] In the current environmental protection technology system, single-reactor SCR units play a crucial role. Typically, flue gas is introduced into the SCR single reactor through an inlet channel. Inside the reactor, with the help of a catalyst and an injected reducing agent, a series of complex chemical reactions occur, effectively converting nitrogen oxides in the flue gas. The purified flue gas is then smoothly discharged through an outlet channel. This process is of great significance for controlling industrial waste gas emissions and mitigating air pollution.

[0003] However, in actual use, some flue gas contains high levels of impurities. When these impurities flow into the flue gas inlet and into the SCR single reactor along with the flue gas, they can easily cause blockages. Impurities tend to accumulate on the catalyst surface inside the SCR single reactor, directly hindering sufficient contact between the reactants and the catalyst, thus weakening the catalytic reaction effect. The originally highly efficient denitrification reaction may fail to proceed normally, resulting in nitrogen oxides in the flue gas failing to meet removal standards, thereby creating potential environmental pollution risks.

[0004] In view of this, this application proposes a single-reactor SCR device to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a single-reactor SCR device. Through the design of a flue gas impurity removal mechanism, impurities in the flue gas can be effectively filtered out, preventing them from entering the SCR single reactor and causing blockage. Furthermore, after being blocked by the inner wall of the conical filter cartridge, these impurities can slide into the feed pipe, then into the inlet pipe, and finally into the impurity collection box, thus achieving the cleaning and collection of impurities. This solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this application specifically adopts the following technical solution:

[0007] A single-reactor SCR device includes an SCR single reactor. A flue gas inlet channel is fixedly connected to one side of the SCR single reactor. A flue gas impurity removal mechanism is provided inside the flue gas inlet channel on one side. The flue gas impurity removal mechanism includes three sets of conical filter cartridges located inside the flue gas inlet channel. Each of the three sets of conical filter cartridges has a set of vent holes that are opened through its surface. The diameter of the vent holes decreases sequentially from top to bottom. A feed pipe is installed at the lower end of each conical filter cartridge. A connecting nut is movably installed at the lower end of the feed pipe. An inlet pipe is threadedly connected to the lower end of the connecting nut. A collection box is located below one side of the flue gas inlet channel.

[0008] Through the above technical solution, when the flue gas passes through the three sets of vents, the impurities mixed in the flue gas are finely filtered three times, reducing the risk of impurities entering the SCR single reactor and causing blockage. The intercepted impurities are located inside the conical filter cartridge, and then slide down the conical slope of the inner wall of the conical filter cartridge into the feed pipe, and then fall vertically through the feed pipe until they enter the inlet pipe.

[0009] In a preferred embodiment, the upper end of the conical filter cartridge is open, the diameter of the upper end of the conical filter cartridge is greater than the diameter of the lower end, and the lower end of the inlet pipe extends into the collection box.

[0010] Through the above technical solution, the debris entering the inlet pipe can slide into the debris collection box through the inlet pipe, thereby collecting the debris into the debris collection box and completing the debris collection.

[0011] In a preferred embodiment, each group of ventilation holes is provided with a plurality of holes, and a smoke inlet is provided above one side of the smoke inlet channel. The SCR single reactor is fixedly connected to the smoke inlet channel through a connecting pipe.

[0012] Through the above technical solution, the flue gas entering the flue gas inlet channel can enter the SCR single reactor through the connecting pipe.

[0013] In a preferred embodiment, a return air pipe is installed above the collection box, and the return air pipe is fixedly connected to the smoke inlet channel above it. A base is fixedly connected to the bottom of the collection box, and the base is fixedly connected to the smoke inlet channel through a support plate.

[0014] With the above technical solution, during the flue gas filtration process, some flue gas will enter the collection box through the inlet pipe. After entering, the flue gas rises in the collection box and can then be re-entered into the flue gas inlet channel through the return pipe.

[0015] In a preferred embodiment, an equipment bracket is installed on the lower outer side of the SCR single reactor, the lower end of the equipment bracket is fixedly connected to the base, a smoke outlet channel is fixedly connected to the lower part of the SCR single reactor, and a cleaning door is movably connected to the left front of the smoke inlet channel via a hinge.

[0016] Through the above technical solution, the equipment support can support the SCR single reactor, and the flue gas after the catalytic reaction of the SCR single reactor can be discharged to the outside through the flue gas outlet channel.

[0017] In a preferred embodiment, multiple sets of fixing plates are installed on the left side inside the smoke inlet channel, and a quick-release plate is installed above the conical filter cylinder. A set of side grooves are opened on both sides of the quick-release plate, and the quick-release plate is slidably connected to the fixing plate through the side grooves.

[0018] With the above technical solution, when it is necessary to clean the conical filter cartridge, open the cleaning door, pull the quick-release plate outward to disengage the side groove from the fixed plate, and the conical filter cartridge can be disassembled and then removed for cleaning.

[0019] As a preferred embodiment, it also includes a dust suppression mechanism located below the smoke inlet channel. The dust suppression mechanism includes a dust removal pipe located below the smoke inlet channel. An air inlet pipe is fixedly connected to the left side of the dust removal pipe, and an air outlet pipe is fixedly connected to the right side of the dust removal pipe. The upper ends of both the air inlet pipe and the air outlet pipe are fixedly connected to the smoke inlet channel.

[0020] In a preferred embodiment, an intake fan is installed above the inside of the intake pipe, an exhaust fan is installed above the inside of the exhaust pipe, an outer water ring is provided inside the dust removal pipe, an inner water ring is provided inside the outer water ring, and multiple sets of atomizing nozzles are installed on one side of the outer water ring and one side of the inner water ring.

[0021] With the above technical solution, the filtered flue gas can be drawn into the dust removal pipe by the intake fan when passing through the intake pipe, and the flue gas in the dust removal pipe can be discharged into the smoke inlet channel by the exhaust fan.

[0022] In a preferred embodiment, the outer water ring is fixedly connected to the inner wall of the dust removal pipe by multiple sets of fixing blocks, the outer water ring is fixedly connected to the inner water ring by multiple sets of connecting pipes, a drain valve is fixedly installed below the dust removal pipe, a water pump is installed above the base, and the water pump is fixedly connected to the outer water ring by a connecting pipe.

[0023] Through the above technical solution, the water pump can pump water into the connecting pipe, and the water flow enters the outer water ring through the connecting pipe, and then enters the inner water ring through the connecting pipe.

[0024] After adopting the above technical solution, the beneficial effects of this utility model are:

[0025] 1. By designing a flue gas impurity removal mechanism, when the flue gas enters the flue gas inlet channel, it passes through three sets of conical filter cartridges with successively decreasing apertures from top to bottom, thus filtering the impurities in the flue gas three times. This effectively removes impurities from the flue gas, making it less likely for them to enter the SCR single reactor and cause blockage. Furthermore, after being blocked by the inner wall of the conical filter cartridges, these impurities can slide into the feed pipe, then into the inlet pipe, and finally into the impurity collection box. This achieves rapid separation of impurities from the flue gas, and also enables rapid cleaning and collection of impurities.

[0026] 2. By designing a dust suppression mechanism, when the dust mixed in the flue gas is large, the flue gas in the flue gas inlet pipe can be introduced into the dust removal pipe through the intake fan. Then, the flue gas passes between the inner and outer water rings, and the water mist sprayed by the atomizing nozzle can suppress the dust in the flue gas. After the dust removal, the flue gas enters the SCR single reactor through the flue gas inlet channel under the action of the exhaust fan. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the single-reactor SCR device of this utility model.

[0029] Figure 2 This is a cross-sectional schematic diagram of the flue gas inlet channel in the single-reactor SCR device of this utility model.

[0030] Figure 3 This is a schematic diagram of the structure of the three sets of conical filter cartridges in the single-reactor SCR device of this utility model.

[0031] Figure 4 for Figure 2 Enlarged schematic diagram of part A.

[0032] Figure 5 for Figure 2 Enlarged schematic diagram of part B.

[0033] Figure 6 This is a schematic diagram of the side view of the dust removal pipe in the single-reactor SCR device of this utility model.

[0034] In the diagram, 1. SCR single reactor; 2. Equipment support; 3. Exhaust duct; 4. Connecting pipe; 5. Inlet duct; 6. Inlet; 7. Flue gas removal mechanism; 71. Inlet pipe; 72. Impurity collection box; 73. Return gas pipe; 74. Conical filter cartridge; 75. Feed pipe; 76. Side trough; 77. Quick-release plate; 78. Connecting nut; 79. Fixing plate; 8. Dust suppression mechanism; 81. Dust removal pipe; 82. Inlet pipe; 83. Exlet pipe; 84. Water pump; 85. Drain valve; 86. Inlet fan; 87. Exhaust fan; 88. Connecting pipe; 89. Outer water ring; 810. Inner water ring; 811. Atomizing nozzle; 9. Support plate; 10. Base; 11. Cleaning door. Detailed Implementation

[0035] 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.

[0036] Please see Figures 1 to 6 The single-reactor SCR device includes an SCR single reactor 1. A flue gas inlet channel 5 is fixedly connected to one side of the SCR single reactor 1. A flue gas impurity removal mechanism 7 is provided inside the flue gas inlet channel 5. The flue gas impurity removal mechanism 7 includes three sets of conical filter cylinders 74 located inside the flue gas inlet channel. Each of the three sets of conical filter cylinders 74 has a set of vent holes that are opened through the surface of the three sets of vent holes. The diameter of the three sets of vent holes decreases from top to bottom. A feed pipe 75 is installed at the lower end of the conical filter cylinder 74. A connecting nut 78 is movably installed at the lower end of the lower feed pipe 75. An inlet pipe 71 is threadedly connected to the lower end of the connecting nut 78. A collection box 72 is provided below one side of the flue gas inlet channel 5.

[0037] As the flue gas passes through the three sets of vents, impurities mixed in the flue gas are finely filtered three times, reducing the risk of impurities entering the SCR single reactor 1 and causing blockage. The intercepted impurities are located inside the conical filter cartridge 74, and then slide down the conical slope of the inner wall of the conical filter cartridge 74 into the feed pipe 75, and then fall vertically through the feed pipe 75 until they enter the inlet pipe 71.

[0038] The upper end of the conical filter cartridge 74 is open, and the diameter of the upper end of the conical filter cartridge 74 is greater than the diameter of the lower end. The lower end of the inlet pipe 71 extends into the collection box 72.

[0039] The debris that enters the inlet tube 71 can slide into the debris collection box 72 through the inlet tube 71, thereby collecting the debris into the debris collection box 72 and completing the collection of debris.

[0040] Each group of vents is provided with several vents, and a smoke inlet 6 is provided on the upper side of the smoke inlet channel 5. The SCR single reactor 1 is fixedly connected to the smoke inlet channel 5 through the connecting pipe 4.

[0041] The flue gas entering the flue gas inlet channel 5 can enter the SCR single reactor 1 through the connecting pipe 4.

[0042] A return air pipe 73 is installed above the collection box 72. The return air pipe 73 is fixedly connected to the smoke inlet channel 5 above. A base 10 is fixedly connected to the bottom of the collection box 72. The base 10 is fixedly connected to the smoke inlet channel 5 through the support plate 9.

[0043] During the flue gas filtration process, some of the flue gas will enter the dust collection box 72 through the inlet pipe 71. After entering, the flue gas rises in the dust collection box 72 and can then be re-entered into the flue gas inlet channel 5 through the return pipe 73.

[0044] An equipment support 2 is installed on the outer side below the SCR single reactor 1. The lower end of the equipment support 2 is fixedly connected to the base 10. An exhaust duct 3 is fixedly connected to the bottom of the SCR single reactor 1. A cleaning door 11 is movably connected to the left front of the exhaust duct 5 via a hinge.

[0045] The equipment support 2 can support the SCR single reactor 1, and the flue gas after the catalytic reaction in the SCR single reactor 1 can be discharged to the outside through the flue gas outlet channel 3.

[0046] Multiple sets of fixing plates 79 are installed on the left side inside the smoke inlet channel 5. A quick-install plate 77 is installed above the conical filter cartridge 74. A set of side grooves 76 are opened on both sides of the quick-install plate 77. The quick-install plate 77 is slidably connected to the fixing plate 79 through the side grooves 76.

[0047] When the conical filter cartridge 74 needs to be cleaned, open the cleaning door 11, pull the quick-release plate 77 outward to disengage the side groove 76 from the fixing plate 79, and the conical filter cartridge 74 can be disassembled and then removed for cleaning.

[0048] It also includes a dust suppression mechanism 8 located below the smoke inlet channel 5. The dust suppression mechanism 8 includes a dust removal pipe 81 located below the smoke inlet channel 5. An air inlet pipe 82 is fixedly connected to the left side of the dust removal pipe 81, and an air outlet pipe 83 is fixedly connected to the right side of the dust removal pipe 81. The upper ends of the air inlet pipe 82 and the air outlet pipe 83 are both fixedly connected to the smoke inlet channel 5.

[0049] An intake fan 86 is installed inside the upper part of the intake pipe 82, an exhaust fan 87 is installed inside the upper part of the exhaust pipe 83, an outer water ring 89 is provided inside the dust removal pipe 81, an inner water ring 810 is provided inside the outer water ring 89, and multiple sets of atomizing nozzles 811 are installed on one side of the outer water ring 89 and one side of the inner water ring 810.

[0050] When the filtered flue gas passes through the inlet pipe 82, it can be drawn into the dust removal pipe 81 by the inlet fan 86. The flue gas located in the dust removal pipe 81 can be discharged into the smoke inlet channel 5 by the exhaust fan 87.

[0051] The outer water ring 89 is fixedly connected to the inner wall of the dust removal pipe 81 by multiple sets of fixing blocks. The outer water ring 89 is fixedly connected to the inner water ring 810 by multiple sets of connecting pipes 88. A drain valve 85 is fixedly installed below the dust removal pipe 81. A water pump 84 is installed above the base 10. The water pump 84 is fixedly connected to the outer water ring 89 by a connecting pipe.

[0052] The water pump 84 can pump water into the connecting pipe, and the water flow enters the outer water ring 89 through the connecting pipe, and then enters the inner water ring 810 through the connecting pipe 88.

[0053] In practical use, the working principle of this utility model is as follows:

[0054] In operation, flue gas is guided into the flue gas channel 5 through the inlet 6. The flue gas then passes through three sets of conical filter cartridges 74. Each of the three sets of conical filter cartridges 74 has a set of ventilation holes on its surface, with the hole diameter decreasing from top to bottom. As the flue gas passes through the three sets of ventilation holes, impurities mixed in the flue gas are finely filtered three times, reducing the risk of impurities entering the SCR single reactor 1 and causing blockage. The intercepted impurities are located inside the conical filter cartridges 74 and then slide down the conical slope of the inner wall of the filter cartridges 74 into the feed pipe 75, with the maximum diameter of the impurities being smaller than the diameter of the feed pipe 75. They then fall vertically through the feed pipe 75 into the inlet pipe 71, and then slide through the inlet pipe 71 into the impurity collection box 72, thus collecting the impurities and completing the impurity collection process. During this process, some flue gas enters the impurity collection box 72. After entering, the flue gas rises in the collection box 72 and can then be re-entered into the flue gas inlet channel 5 through the return gas pipe 73. The flue gas, after being filtered three times, can enter the connecting pipe 4 along the flue gas inlet channel 5, and then smoothly reach the SCR single reactor 1 through the connecting pipe 4, where the catalytic reaction process is realized.

[0055] When the dust content in the flue gas is high, after the flue gas passes through the flue gas impurity removal mechanism 7, the intake fan 86 is activated. At this time, the filtered flue gas is drawn into the dust removal pipe 81 by the intake fan 86 as it passes through the intake pipe 82. Simultaneously, the water pump 84 draws water into the connecting pipe, and the water flows through the connecting pipe into the outer water ring 89, and then into the inner water ring 810 through the connecting pipe 88. Water mist is sprayed out through multiple sets of atomizing nozzles 811. When the flue gas passes through, the dust particles are encapsulated and adsorbed by the water mist, achieving efficient dust reduction. The wastewater generated during the dust reduction process can be discharged by opening the drain valve 85 after the dust reduction is completed. At the same time, the exhaust fan 87 discharges the flue gas that has undergone dust reduction treatment into the flue gas inlet channel 5 through the exhaust pipe 83. Finally, the flue gas still smoothly enters the SCR single reactor 1 along the connecting pipe 4 for catalytic reaction. After the catalytic reaction is completed, the purified flue gas is discharged outward through the flue gas outlet channel 3.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A single-reactor SCR device, comprising a single SCR reactor (1), characterized in that: The SCR single reactor (1) is fixedly connected to a flue gas inlet channel (5) on one side, and a flue gas impurity removal mechanism (7) is provided on one side inside the flue gas inlet channel (5). The flue gas impurity removal mechanism (7) includes three sets of conical filter cylinders (74) located on one side inside the flue gas inlet channel (5). Each of the three sets of conical filter cylinders (74) has a set of ventilation holes through it. The diameter of the ventilation holes decreases from top to bottom. The lower end of the conical filter cartridge (74) is equipped with a feed pipe (75), and the lower end of the feed pipe (75) is movably equipped with a connecting nut (78). The lower end of the connecting nut (78) is connected to an inlet pipe (71) by a thread. A dust collection box (72) is provided below one side of the smoke inlet channel (5).

2. The single-reactor SCR device as described in claim 1, characterized in that: The upper end of the conical filter (74) is open, the diameter of the upper end of the conical filter (74) is greater than the diameter of the lower end, and the lower end of the inlet pipe (71) extends into the collection box (72).

3. The single-reactor SCR device as described in claim 2, characterized in that: Each group of ventilation holes is provided with several, and a smoke inlet (6) is provided above one side of the smoke inlet channel (5). The SCR single reactor (1) is fixedly connected to the smoke inlet channel (5) through a connecting pipe (4).

4. The single-reactor SCR device as described in claim 3, characterized in that: A return air pipe (73) is installed above the collection box (72). The return air pipe (73) is fixedly connected to the smoke inlet channel (5) above. A base (10) is fixedly connected below the collection box (72). The base (10) is fixedly connected to the smoke inlet channel (5) through a support plate (9).

5. The single-reactor SCR device as described in claim 4, characterized in that: A device support (2) is installed on the outer side below the SCR single reactor (1). The lower end of the device support (2) is fixedly connected to the base (10). A smoke outlet channel (3) is fixedly connected below the SCR single reactor (1). A cleaning door (11) is movably connected to the left front of the smoke inlet channel (5) via a hinge.

6. The single-reactor SCR device as described in claim 2, characterized in that: Multiple sets of fixing plates (79) are installed on the left side inside the smoke inlet channel (5). A quick-install plate (77) is installed above the conical filter cylinder (74). A set of side grooves (76) are opened on both sides of the quick-install plate (77). The quick-install plate (77) is slidably connected to the fixing plate (79) through the side grooves (76).

7. The single-reactor SCR device as described in claim 4, characterized in that: It also includes a dust suppression mechanism (8) located below the smoke inlet channel (5). The dust suppression mechanism (8) includes a dust removal pipe (81) located below the smoke inlet channel (5). An air inlet pipe (82) is fixedly connected to the left side of the dust removal pipe (81), and an air outlet pipe (83) is fixedly connected to the right side of the dust removal pipe (81). The upper ends of the air inlet pipe (82) and the air outlet pipe (83) are both fixedly connected to the smoke inlet channel (5).

8. The single-reactor SCR device as described in claim 7, characterized in that: An intake fan (86) is installed above the inside of the intake pipe (82), an exhaust fan (87) is installed above the inside of the exhaust pipe (83), an outer water ring (89) is provided inside the dust removal pipe (81), an inner water ring (810) is provided inside the outer water ring (89), and multiple sets of atomizing nozzles (811) are installed on one side of the outer water ring (89) and one side of the inner water ring (810).

9. The single-reactor SCR device as described in claim 8, characterized in that: The outer water ring (89) is fixedly connected to the inner wall of the dust removal pipe (81) through multiple sets of fixing blocks. The outer water ring (89) is fixedly connected to the inner water ring (810) through multiple sets of connecting pipes (88). A drain valve (85) is fixedly installed below the dust removal pipe (81). A water pump (84) is installed above the base (10). The water pump (84) is fixedly connected to the outer water ring (89) through a connecting pipe.

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