SCR (Selective Catalytic Reduction) denitration ammonia injection grid device

Abstract

The utility model discloses an SCR (Selective Catalytic Reduction) denitration ammonia spraying grid device, which relates to an SCR denitration ammonia spraying grid and comprises a positioning block and an ammonia spraying grid main body arranged on one side of the positioning block, a limiting block is fixedly arranged on one side of the ammonia spraying grid main body, the other end of the limiting block is inserted into the positioning block in a sliding manner, and the ammonia spraying grid device further comprises a bolt, the sliding block is arranged in the positioning block in the vertical direction and is inserted into the top of the limiting block in a sliding manner; the sliding plate is slidably arranged in the positioning block, and the bottom is fixedly connected with the top of the bolt; the permanent magnet block is fixedly mounted at the top of the sliding plate; the iron block is placed at the top of the positioning block, then the iron block can attract the permanent magnet block to drive the sliding plate and the plug pin to compress the reset spring and slide upwards until the plug pin completely slides out of the positioning groove, at the moment, the permanent magnet block exactly abuts against the inner top wall of the cavity, and then the ammonia spraying grid body drives the limiting block to slide out of the sliding opening. Therefore, the ammonia spraying grid main body can be conveniently detached and replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of SCR denitration ammonia injection grids, in particular to an SCR denitration ammonia injection grid device. Background Art

[0002] Selective catalytic reduction technology (SCR) is currently the most mature flue gas denitrification technology. It is a post-furnace denitrification method that uses a reducing agent (NH3, urea) to selectively react with NOx under the action of a metal catalyst to produce nitrogen and water, rather than being oxidized by oxygen. In order to facilitate the maintenance and replacement of the SCR denitrification ammonia injection grid, a detachable SCR denitrification ammonia injection grid device has now appeared, that is, the SCR denitrification ammonia injection grid is snapped into the denitrification device using a snap-on structure.

[0003] For example, an existing patent (publication number: CN210495942U) discloses a liquid ammonia spray grid for SCR denitrification. Through the coordinated use of a rotating knob, a rotating shaft, a bidirectional screw, a threaded sleeve, a rotation-stop slider, a rotation-stop groove, an L-shaped clamping rod and a clamping groove, the ammonia spray grid is easy to disassemble, replace and repair, thereby meeting the requirements of use.

[0004] However, the liquid ammonia spraying grid for SCR denitrification designed above still has some shortcomings in actual use: although the liquid ammonia spraying grid for SCR denitrification can be easily disassembled, assembled and replaced by the use of a rotating knob, a rotating shaft, a bidirectional screw, a threaded sleeve, a stop slider, a stop groove, an L-shaped clamping rod and a clamping groove, since part of the rotating shaft is exposed to the outside world and there are corrosive gases and liquids in the denitrification device, the chemical substances in the corrosive environment will react with the rotating shaft material, causing corrosion on the rotating shaft surface, and may even penetrate into the interior of the rotating shaft, causing structural damage. When the rotating shaft is damaged, it is prone to breakage, making it impossible to rotate normally.

[0005] To this end, we designed an SCR denitrification ammonia injection grid device to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide an SCR denitration ammonia injection grid device to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the utility model provides an SCR denitration ammonia injection grid device, comprising a positioning block and an ammonia injection grid body arranged on one side of the positioning block, wherein a limiting block is fixedly installed on one side of the ammonia injection grid body, and the other end of the limiting block is slidably inserted into the positioning block, and further comprising:

[0008] A latch is vertically arranged in the positioning block and slidably plugged into the top of the limiting block;

[0009] The slide plate is slidably arranged in the positioning block, and the bottom thereof is fixedly connected to the top of the latch;

[0010] A permanent magnet block is fixedly mounted on the top of the skateboard;

[0011] The return spring is fixedly installed in the positioning block along the vertical direction, and the other end is fixedly connected to the top of the slide plate.

[0012] Furthermore, a guide rod is inserted into the slide plate, and both ends of the guide rod are fixedly installed in the positioning block.

[0013] Furthermore, a positioning groove is provided on the top of the limiting block, and the end of the latch away from the slide plate is slidably inserted into the positioning groove.

[0014] Furthermore, a cavity and a sliding opening are respectively provided inside and on one side of the positioning block, the cavity is connected to the sliding opening, the limit block is slidably inserted in the sliding opening, the slide is slidably installed in the cavity, the end of the return spring away from the slide is fixedly installed on the bottom wall of the cavity, and both ends of the guide rod are fixedly installed in the cavity.

[0015] Furthermore, a placement slot is provided on the top of the positioning block, and the placement slot is located directly above the permanent magnet block.

[0016] Furthermore, a drainage hole is provided in the placement tank for discharging the corrosive gas that has penetrated into the placement tank.

[0017] Furthermore, there are multiple drainage holes, and the multiple drainage holes are arranged in the placement groove at equal intervals.

[0018] Furthermore, a limiting rod is fixedly installed on one side of the ammonia injection grid body, and a support block is slidably sleeved on the other end of the limiting rod, and a distance is left between the support block and the limiting rod.

[0019] Compared with the prior art, the beneficial effect of the present invention is: by placing an iron block on the top of the positioning block, the iron block will then attract the permanent magnet block to drive the slide plate and the latch to compress the reset spring and slide upward until the latch completely slides out of the positioning groove. At this time, the permanent magnet block just contacts the inner top wall of the cavity, and then the ammonia spray grille body drives the limit block to slide out of the sliding port, so that the ammonia spray grille body can be easily disassembled and replaced.

[0020] Compared with the prior art, the beneficial effect of the present invention is that during the use of the spray ammonia grid body, the limit rod will be inserted into the support block, and the support block and the positioning block need to be installed on both sides of the inner wall of the de-pinning device, so that the support block can play the role of supporting one side of the spray ammonia grid body, alleviating the pressure of the spray ammonia grid body on the positioning block, thereby improving stability. When disassembling the spray ammonia grid body, the limit rod will slide into the inside of the support block to avoid the problem of motion interference.

[0021] Compared with the prior art, the beneficial effect of the present invention is that during the use of the SCR denitrification ammonia injection grid device, gas and liquid will flow into the placement tank and can be discharged through the drainage hole in time, making it convenient for personnel to place iron blocks in the placement tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the external three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the side exterior of the utility model;

[0024] Figure 3 This is a schematic diagram of the external structure of the positioning block of the utility model in a half-section view;

[0025] Figure 4 For this utility model Figure 3 Enlarged view of point A in the middle.

[0026] In the figure: 1. Positioning block; 2. Ammonia injection grid body; 3. Limiting block; 4. Latch; 5. Slide plate; 6. Permanent magnet block; 7. Return spring; 8. Guide rod; 9. Positioning groove; 10. Cavity; 11. Slide; 12. Placement groove; 13. Drain hole; 14. Support block; 15. Limiting rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-4 The utility model provides a technical solution: an SCR denitration ammonia injection grid device, comprising a positioning block 1 and an ammonia injection grid body 2 arranged on one side of the positioning block 1, a limiting block 3 is fixedly installed on one side of the ammonia injection grid body 2, and the other end of the limiting block 3 is slidably inserted into the positioning block 1, and further comprising:

[0029] The latch 4 is vertically arranged in the positioning block 1 and is slidably inserted into the top of the limiting block 3;

[0030] The slide plate 5 is slidably disposed in the positioning block 1, and the bottom thereof is fixedly connected to the top of the latch 4;

[0031] The permanent magnet block 6 is fixedly mounted on the top of the slide plate 5;

[0032] The return spring 7 is fixedly installed in the positioning block 1 in the vertical direction, and the other end is fixedly connected to the top of the slide 5. A positioning groove 9 is provided at the top of the limit block 3, and the end of the latch 4 away from the slide 5 is slidably inserted in the positioning groove 9. A cavity 10 and a sliding mouth 11 are respectively provided inside and on one side of the positioning block 1. The cavity 10 is connected to the sliding mouth 11. The limit block 3 is slidably inserted in the sliding mouth 11, and the slide 5 is slidably installed in the cavity 10. The end of the return spring 7 away from the slide 5 is fixedly installed on the bottom wall of the cavity 10, and both ends of the guide rod 8 are fixedly installed in the cavity 10.

[0033] During specific implementation, when the ammonia spray grid body 2 needs to be disassembled, the iron block is first placed in the placement groove 12, and then the iron block will attract the permanent magnet block 6 to drive the slide plate 5 and the latch 4 to compress the reset spring 7 and slide upward until the latch 4 completely slides out of the positioning groove 9. At this time, the permanent magnet block 6 is just against the inner top wall of the cavity 10, and then the ammonia spray grid body 2 drives the limit block 3 to slide out of the slide 11, so that the ammonia spray grid body 2 can be easily disassembled and replaced. When replacing, just operate according to the above principle.

[0034] See Figure 1-4 A guide rod 8 is inserted into the slide plate 5, and both ends of the guide rod 8 are fixedly mounted in the positioning block 1. The slide plate 5 can only slide along the direction in which the guide rod 8 is set, avoiding the problem of motion deviation.

[0035] See Figure 1-4 A placement slot 12 is provided on the top of the positioning block 1, and the placement slot 12 is located directly above the permanent magnet block 6. Personnel can directly place the iron block in the placement slot 12. Since the placement slot 12 is located directly above the permanent magnet block 6, it is convenient to find the best position for adsorbing the permanent magnet block 6.

[0036] See Figure 1-4 Drain holes 13 are provided within the placement tank 12 to discharge corrosive gases that have seeped into the placement tank 12. During use of the SCR denitration ammonia injection grid device, gas and liquid will flow into the placement tank 12 and can be promptly discharged through the drain holes 13, making it easier for personnel to place the iron block within the placement tank 12. Multiple drain holes 13 are provided, and are evenly spaced within the placement tank 12. The provision of multiple drain holes 13 can increase the rate at which gas and liquid are discharged.

[0037] See Figure 1-4 A limit rod 15 is fixedly mounted on one side of the ammonia spray grid body 2. The other end of the limit rod 15 is slidably sleeved with a support block 14, with a gap between the support block 14 and the limit rod 15. During use of the ammonia spray grid body 2, the limit rod 15 is inserted into the support block 14. The support block 14 and the positioning block 1 need to be installed on both sides of the inner wall of the de-pinning device, so that the support block 14 can support one side of the ammonia spray grid body 2, relieving the pressure of the ammonia spray grid body 2 on the positioning block 1, thereby improving stability. When the ammonia spray grid body 2 is disassembled, the limit rod 15 will slide into the support block 14 to avoid motion interference.

[0038] It should be noted that although the latch 4, slide 5 and permanent magnet block 6 involved in the SCR denitrification ammonia injection grid device are all located inside the positioning block 1, in order to improve its sealing, we can also put a sealing ring on the limit block 3. The sealing ring is against the sliding mouth 11, and the small gap between the limit block 3 and the sliding mouth 11 can be filled, which can avoid the problem of gas and liquid penetrating into the cavity 10 through the sliding mouth 11 and corroding the latch 4, slide 5 and permanent magnet block 6.

[0039] Working principle: When the ammonia spray grille body 2 needs to be disassembled, the iron block is first placed in the placement groove 12. Then the iron block will attract the permanent magnet block 6 to drive the slide plate 5 and the latch 4 to compress the return spring 7 and slide upward along the direction set by the guide rod 8 until the latch 4 completely slides out of the positioning groove 9. At this time, the permanent magnet block 6 just abuts against the inner top wall of the cavity 10. Then the ammonia spray grille body 2 drives the limit block 3 to slide out of the sliding opening 11, so that the ammonia spray grille body 2 can be easily disassembled and replaced. When replacing, just follow the above principle;

[0040] It should be noted that, during use of the spray ammonia grid body 2, the limiting rod 15 will be inserted into the support block 14, and the support block 14 and the positioning block 1 need to be installed on both sides of the inner wall of the de-pinning device, so that the support block 14 can play the role of supporting one side of the spray ammonia grid body 2, relieving the pressure of the spray ammonia grid body 2 on the positioning block 1, thereby improving stability. When the spray ammonia grid body 2 is disassembled, the limiting rod 15 will slide into the support block 14 to avoid the problem of movement interference;

[0041] In addition, during the use of the SCR denitration ammonia injection grid device, gas and liquid will flow into the placement tank 12 and can be discharged through the drainage hole 13 in time, making it convenient for personnel to place iron blocks in the placement tank 12.

Claims

1. An SCR denitration ammonia spray grid device, comprising a positioning block (1) and an ammonia spray grid body (2) arranged on one side of the positioning block (1), a limiting block (3) being fixedly mounted on one side of the ammonia spray grid body (2), and the other end of the limiting block (3) being slidably inserted into the positioning block (1), characterized in that: Also includes, A latch (4) is vertically arranged in the positioning block (1) and is slidably inserted into the top of the limiting block (3); A slide plate (5) is slidably disposed in the positioning block (1), and the bottom portion is fixedly connected to the top portion of the latch (4); A permanent magnet block (6) is fixedly mounted on the top of the slide (5); The return spring (7) is fixedly mounted in the positioning block (1) along the vertical direction, and the other end is fixedly connected to the top of the slide plate (5).

2. The SCR denitration ammonia injection grid device according to claim 1, characterized in that: A guide rod (8) is inserted into the slide plate (5), and both ends of the guide rod (8) are fixedly mounted in the positioning block (1).

3. The SCR denitration ammonia injection grid device according to claim 1, characterized in that: A positioning groove (9) is provided on the top of the limit block (3), and the end of the latch (4) away from the slide plate (5) is slidably inserted into the positioning groove (9).

4. The SCR denitration ammonia injection grid device according to claim 2, characterized in that: A cavity (10) and a sliding opening (11) are respectively provided inside and on one side of the positioning block (1), the cavity (10) is communicated with the sliding opening (11), the limit block (3) is slidably inserted in the sliding opening (11), the slide (5) is slidably installed in the cavity (10), the end of the return spring (7) away from the slide (5) is fixedly installed on the bottom wall of the cavity (10), and both ends of the guide rod (8) are fixedly installed in the cavity (10).

5. The SCR denitration ammonia injection grid device according to claim 1, characterized in that: A placement slot (12) is provided on the top of the positioning block (1), and the placement slot (12) is located directly above the permanent magnet block (6).

6. The SCR denitration ammonia injection grid device according to claim 5, characterized in that: A drainage hole (13) is provided in the placement groove (12) for discharging the corrosive gas that has infiltrated into the placement groove (12).

7. The SCR denitration ammonia injection grid device according to claim 6, characterized in that: There are a plurality of drainage holes (13), and the plurality of drainage holes (13) are arranged at equal intervals in the placement groove (12).

8. The SCR denitration ammonia injection grid device according to claim 1, characterized in that: A limiting rod (15) is fixedly mounted on one side of the ammonia injection grid body (2); a support block (14) is slidably sleeved on the other end of the limiting rod (15); and a distance is left between the support block (14) and the limiting rod (15).

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