Ammonia spraying grid with anti-abrasion baffle at bottom

Abstract

The utility model relates to the technical field of denitration ammonia spraying, in particular to an ammonia spraying grating with an anti-abrasion baffle at the bottom, which comprises a flue inner wall, and a plurality of ammonia spraying pipelines are arranged in the flue inner wall. When the flow speed of flue gas in the inner wall of a flue is high, an arc-shaped wear-resisting block drives a sliding rod to move upwards, a spring is stretched, the sliding rod drives a top plate to extrude a ball at the bottom of a convex block while moving upwards, the convex block drives the right end of a transverse rod to rotate upwards, and a supporting rod is rotationally connected with the transverse rod through a pin shaft; the left end of the cross rod rotates downwards to drive a roller to extrude a spoiler, so that the spoiler is driven to open, a gas flow low-pressure area at the top of the spoiler is enlarged, and an ammonia spraying pipeline, a first spray head and a second spray head can still be well protected when the flow speed of flue gas is increased; the direct abrasion of the flue gas is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of denitration ammonia injection, specifically to a bottom has the ammonia injection grid of anti -wear baffle. BACKGROUND

[0002] At present, the method of ammonia injection grid is generally adopted, and the ammonia injection grid is usually composed of metal pipe bundles with small holes opened upwards, and the metal pipe bundles are perpendicular to the flow direction of flue gas. Since the flue gas contains a considerable concentration of dust, the abrasion of the ammonia injection grid pipe bundle is a problem worth attention.

[0003] CN220496007U discloses a bottom has the ammonia injection grid of anti -wear baffle, including a plurality of parallel arrangement's ammonia injection pipeline, the both ends of ammonia injection pipeline respectively horizontal fixed in the flue inner wall, the bottom of ammonia injection pipeline is equipped with the anti -wear baffle of triangle, the top of ammonia injection pipeline is equipped with the nozzle. The utility model discloses windward surface setting anti -wear angle steel of ammonia injection pipeline can effectively avoid the problem that ammonia injection pipeline is abraded seriously in the use process, guarantee the smooth progress of denitration work, guarantee the denitration efficiency of system, improved denitration efficiency.

[0004] In actual use, the upward flow of flue gas is blocked and divided by the anti-wear angle steel, forming a low-pressure area at the top of the anti-wear angle steel with small wind resistance, and the ammonia injection pipe and nozzle are in the low-pressure area, thereby avoiding the abrasion of flue gas on them. However, the flow rate of flue gas rising is not fixed, and when the flow rate is fast, the low-pressure area formed will be smaller, causing the ammonia injection pipe and nozzle to come into contact with flue gas, which may still cause damage to the ammonia injection pipe and nozzle. To solve the above problems, we propose a bottom has the ammonia injection grid of anti -wear baffle. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a bottom has the ammonia injection grid of anti -wear baffle to solve the problem raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a bottom has the ammonia injection grid of anti -wear baffle, including flue inner wall, the inside of flue inner wall is provided with a plurality of ammonia injection pipeline, the top of ammonia injection pipeline is provided with first spray head and second spray head, the lower side of ammonia injection pipeline is provided with box and arc wear -resisting piece in proper order, the both sides of box are provided with spoiler, arc wear -resisting piece and spoiler divide the flow of flue gas and form a low-pressure part of air current, thereby avoiding the abrasion of flue gas flow on the surface of ammonia injection pipe.

[0007] Further preferably, the box is fixedly connected to the bottom of the ammonia injection pipe, a slide rod is slidably connected to the inner wall of the bottom of the box, the slide rods are arranged in groups, and the bottom end of the slide rod is fixedly connected to the top of the arc wear-resistant block.

[0008] Further preferably, the spoiler is rotatably connected to the outer side of the box through a hinge, a plurality of support rods are fixedly connected to the outer side wall of the box, a cross bar is rotatably connected between the corresponding two support rods through a pin shaft, a roller is rotatably connected to the outer side end of the cross bar, the roller is in rolling contact with the spoiler, and the inner side end of the cross bar extends into the box and is in sliding connection with the through hole formed in the side wall of the box.

[0009] Further preferably, the bottom of the inner side end of the cross bar is fixedly connected with a protruding block, and the bottom of the protruding block is embedded with a ball bearing, and the top of the sliding rod is fixedly connected with a top plate, and the ball bearing is in rolling contact with the top plate.

[0010] Further preferably, a spring is fixedly connected between the top plate and the bottom inner wall of the box, and the spring is movably sleeved on the outer side of the sliding rod.

[0011] Further preferably, the top of the spoiler is provided as an inclined surface, and a torsion spring is arranged between the spoiler and the box.

[0012] Further preferably, the plurality of ammonia injection pipelines are communicated through a connecting pipe, and the ammonia injection is controlled through a control valve connected to the connecting pipe.

[0013] Further preferably, the arc surface of the arc-shaped wear-resistant block is inwardly recessed.

[0014] Compared with the prior art, the utility model discloses the inside of flue inner wall is provided with a plurality of ammonia injection pipelines, the top of ammonia injection pipeline is provided with first spray head and second spray head, the bottom of ammonia injection pipeline is sequentially provided with box and arc-shaped wear-resistant block, the both sides of box are provided with spoiler, arc-shaped wear-resistant block and spoiler divide and form airflow low pressure part to the flue gas, thereby avoid that the surface of ammonia injection pipeline is caused abrasion when flue gas flows, when the flow rate of flue gas inside is faster, the airflow low pressure area formed by arc-shaped wear-resistant block to flue gas is smaller, because the flow rate is faster, the pressure is greater, simultaneously, the arc-shaped wear-resistant block is extruded to an upward pressure by flue gas, the arc-shaped wear-resistant block drives sliding rod to move upward, spring is stretched, the sliding rod moves upward and drives the ball bearing on the bottom of protruding block to be extruded, the protruding block drives the right end of cross bar to rotate upward, the support rod is rotatably connected with cross bar through pin shaft, thereby forming a labor-saving lever, the left end of cross bar rotates downward, thereby driving roller to extrude spoiler, thereby driving spoiler to open, thereby make airflow low pressure area on the top of spoiler larger, thereby still can when the flow rate of flue gas is faster, the first spray head, second spray head and ammonia injection pipeline are protected, avoid that they are directly abraded by flue gas.

[0015] Compared with the traditional horizontally arranged baffle, the movable spoiler plate is subjected to small resistance of flue gas, thereby increasing the service life of the spoiler plate, and the opening angle of the spoiler plate can be automatically adjusted in real time according to the flow rate, when the flow rate is low, the opening angle of the spoiler plate is automatically contracted to reduce the resistance, and when the flow rate is high, the spoiler plate is opened to avoid that the flue gas causes abrasion to the ammonia injection pipeline, thereby making the applicability wider. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view plane structure schematic diagram of the utility model;

[0017] Figure 2 It is the utility model flue gas wind speed is small Figure 1 F-F section view;

[0018] Figure 3 It is the utility model flue gas wind speed is large Figure 1 F-F section view;

[0019] Figure 4 It is Figure 2 A zone enlarged stereogram structure schematic diagram;

[0020] Figure 5 It is the connecting schematic diagram of arc-shaped wear-resistant block inner recess structure.

[0021] In the drawing: 1, flue inner wall; 2, ammonia injection pipeline; 3, first spray head; 4, connecting pipe; 5, control valve; 6, second spray head; 7, box body; 8, arc-shaped wear-resistant block; 9, spoiler plate; 10, cross bar; 11, roller; 12, protruding block; 13, ball; 14, sliding rod; 15, top plate; 16, spring; 17, support rod; 18, through hole; 19, torsional spring; 20, inclined surface part. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Please refer to Figures 1-5The utility model provides a technical scheme: a kind of ammonia injection grid with anti-abrasion baffle in bottom, including flue inner wall 1, the inside of flue inner wall 1 is provided with multiple ammonia injection ducts 2, the top of ammonia injection duct 2 is provided with first spray head 3 and second spray head 6, the below of ammonia injection duct 2 is sequentially provided with box 7 and arc wear block 8, the both sides of box 7 are provided with spoiler 9, arc wear block 8 and spoiler 9 shunt and form airflow low pressure part to smoke, to avoid the surface of ammonia injection duct 2 to be caused abrasion when smoke flow rate in the inside of flue inner wall 1 is faster, airflow low pressure area formed by arc wear block 8 to smoke shunt can be smaller, because the faster flow rate, the greater pressure, simultaneously, smoke exerts an upward extrusion force to arc wear block 8, arc wear block 8 drives slide rod 14 to move upwards, spring 16 is stretched, slide rod 14 moves upwards simultaneously drives top plate 15 to extrude ball 13 in the bottom of protruding block 12, protruding block 12 drives the right end of cross bar 10 to rotate upwards, support rod 17 is rotatably connected with cross bar 10 by pin shaft, to form a labor-saving lever, the left end of cross bar 10 rotates downwards, to drive roller 11 to extrude spoiler 9, to drive spoiler 9 to open, to make airflow low pressure area in the top of spoiler 9 larger, to still be able to when smoke flow rate is fast to the protection of ammonia injection duct 2 and first spray head 3, second spray head 6, avoid its direct abrasion by smoke.

[0024] In the embodiment, specifically: the box 7 is fixedly connected to the bottom of the ammonia injection duct 2, the bottom inner wall of the box 7 is slidably connected with the slide rod 14, the slide rod 14 is provided in pairs, and a plurality of groups of the slide rod 14 are arranged, and the bottom end of the slide rod 14 is fixedly connected with the top of the arc wear block 8;

[0025] In the embodiment, specifically: the spoiler 9 is rotatably connected to the outside of the box 7 by a hinge, a plurality of groups of support rods 17 are fixedly connected to the outer side wall of the box 7, the cross bar 10 is rotatably connected between the corresponding two support rods 17 by a pin shaft, the roller 11 is rotatably connected to the outside end of the cross bar 10, the roller 11 is in rolling contact with the spoiler 9, and the inside end of the cross bar 10 extends into the box 7 and is slidably connected with the through hole 18 formed in the side wall of the box 7;

[0026] In the embodiment, specifically: the bottom of the inside end of the cross bar 10 is fixedly connected with the protruding block 12, the bottom of the protruding block 12 is embedded with the ball 13, the top of the slide rod 14 is fixedly connected with the top plate 15, and the ball 13 is in rolling contact with the top plate 15;

[0027] In the embodiment, specifically: the spring 16 is movably sleeved outside the slide rod 14 and fixedly connected between the top plate 15 and the bottom inner wall of the box 7;

[0028] In the embodiment, specifically: the top of the spoiler 9 is provided as an inclined surface portion 20, and the spoiler 9 is provided with the torsion spring 19 between the box 7.

[0029] In the embodiment, specifically, the plurality of ammonia injection pipes 2 are communicated through the connecting pipes 4, and the connecting pipes 4 control the ammonia injection through the control valves 5 connected thereto.

[0030] In the embodiment, specifically, the arc-shaped wear-resistant blocks 8 are concave inwardly, as shown in the figure, the arc-shaped wear-resistant blocks 8 are concave toward the ammonia injection pipes 2, and the concave surfaces can be plate-shaped arc-shaped structures or spherical arc-shaped structures, so that better flow impact can be obtained. Figure 5

[0031] When the smoke flow rate inside the flue inner wall 1 is fast, the air flow low pressure area formed by the arc-shaped wear-resistant blocks 8 for the smoke flow splitting becomes smaller, because the faster the flow rate, the greater the pressure, and at the same time, the smoke exerts an upward extrusion force on the arc-shaped wear-resistant blocks 8, the arc-shaped wear-resistant blocks 8 drive the slide rods 14 to move upward, the springs 16 are stretched, the slide rods 14 move upward at the same time, drive the top plates 15 to extrude the balls 13 at the bottom of the protruding blocks 12, the protruding blocks 12 drive the right end of the cross bars 10 to rotate upward, the supporting rods 17 are rotatably connected with the cross bars 10 through the pin shafts, so that a labor-saving lever is formed, the left end of the cross bars 10 rotates downward, so as to drive the rollers 11 to extrude the spoiler plates 9, so as to drive the spoiler plates 9 to open, so that the air flow low pressure area at the top of the spoiler plates 9 becomes larger, so that the ammonia injection pipes 2 and the first nozzle 3 and the second nozzle 6 can still be well protected when the smoke flow rate becomes fast, and direct abrasion of the smoke is avoided.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.​

Claims

1. An ammonia injection grid with wear-resistant baffle at the bottom, comprising a flue inner wall (1), characterized in that: The inside of the flue inner wall (1) is provided with a plurality of ammonia injection pipes (2), the upper part of the ammonia injection pipe (2) is provided with a first nozzle (3) and a second nozzle (6), the lower part of the ammonia injection pipe (2) is sequentially provided with a box (7) and an arc-shaped wear-resistant block (8), the both sides of the box (7) are provided with a spoiler (9), the arc-shaped wear-resistant block (8) and the spoiler (9) split the flue gas and form a low-pressure part of the airflow, thereby avoiding the surface of the ammonia injection pipe (2) from being worn by the flue gas flow.

2. The ammonia injection lattice with wear-resistant bottom apron according to claim 1, characterized in that: The box (7) is fixedly connected to the bottom of the ammonia injection pipe (2), the bottom inner wall of the box (7) is slidably connected with a slide rod (14), the slide rod (14) is provided in pairs and multiple groups, and the bottom end of the slide rod (14) is fixedly connected with the top of the arc-shaped wear-resistant block (8).

3. The ammonia injection lattice with wear-resistant bottom apron according to claim 2, characterized in that: The spoiler (9) is rotatably connected to the outer side of the box (7) through a hinge, a plurality of support rods (17) are fixedly connected to the outer side wall of the box (7), a cross rod (10) is rotatably connected between the corresponding two support rods (17) through a pin shaft, a roller (11) is rotatably connected to the outer end of the cross rod (10), the roller (11) is in rolling contact with the spoiler (9), and the inner end of the cross rod (10) extends into the box (7) and is slidably connected with a through hole (18) formed in the side wall of the box (7).

4. The ammonia injection lattice with wear-resistant bottom apron according to claim 3, characterized in that: The bottom of the inner end of the cross rod (10) is fixedly connected with a protruding block (12), the bottom of the protruding block (12) is embedded with a ball (13), the top of the slide rod (14) is fixedly connected with a top plate (15), and the ball (13) is in rolling contact with the top plate (15).

5. The ammonia injection lattice with wear-resistant bottom apron according to claim 4, characterized in that: The spring (16) is movably sleeved on the outer side of the slide rod (14).

6. The ammonia injection lattice with wear resistant bottom apron of claim 1, wherein: The top of the spoiler (9) is provided as an inclined surface part (20), and a torsion spring (19) is arranged between the spoiler (9) and the box (7).

7. The ammonia injection lattice with wear resistant bottom apron of claim 1, wherein: The plurality of ammonia injection pipes (2) are communicated through a connecting pipe (4), and the connecting pipe (4) controls ammonia injection through a control valve (5) connected thereto.

8. The ammonia injection grid with wear plate on the bottom according to claim 1, characterized in that: The arc surface of the arc-shaped wear-resistant block (8) is concave inward.

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