CN210495942U

CN210495942U - Liquid ammonia spraying grid for SCR denitration

Info

Publication number: CN210495942U
Application number: CN201921390122.0U
Authority: CN
Inventors: 彭德杰; 马兰
Original assignee: Jiangsu Fengrun Environmental Protection Technology Co Ltd
Current assignee: Jiangsu Fengrun Environmental Protection Technology Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-05-12
Anticipated expiration: 2029-08-23

Abstract

The utility model discloses a liquid ammonia spraying grid for SCR denitration, relate to SCR denitration spraying grid technical field, including the grid pipe, the grid pipe is provided with a plurality ofly, a plurality of grid union couplings form spraying grid, the intersection of a plurality of grid pipes all is equipped with the ammonia shower nozzle, the equal fixedly connected with installation convex block in both sides middle part of spraying grid, all be equipped with the fixed spill case rather than the adaptation on two installation convex blocks, the one end middle part of fixed spill case is equipped with the knob, the knob is close to the one end of one side middle part fixed connection rotation axis of fixed spill case, the other end of rotation axis inserts fixed spill case and the two-way screw rod of fixedly connected with, the equal threaded connection in both ends of two-way screw rod has the thread bush. The utility model discloses be convenient for carry out dismouting, change to spraying ammonia grid, the convenience is maintained spraying ammonia grid, satisfies the operation requirement, and the convenience is carried out the dismouting to spraying ammonia shower nozzle, is convenient for maintain, avoids taking place to block up, guarantees the efficiency of denitration.

Description

Liquid ammonia spraying grid for SCR denitration

Technical Field

The utility model relates to a SCR denitration ammonia injection grid technical field, in particular to liquid ammonia injection grid for SCR denitration.

Background

Selective Catalytic Reduction (SCR) is the most mature flue gas denitration technology at present, and is a method for denitration after a furnace by using a reducing agent (NH)₃Urea) reacts selectively with NOx to form nitrogen and water, rather than being oxidized by oxygen, over a metal catalyst.

The prior ammonia injection grid has the following defects in the using process: 1. the ammonia spraying grid pipe is directly impacted by smoke for a long time, so that the loss of the ammonia spraying grid pipe is easy to be serious, and the existing ammonia spraying grid pipe is generally directly welded on the inner wall of a flue, so that the ammonia spraying grid pipe is inconvenient to disassemble, assemble and maintain and cannot meet the use requirement; 2. the existing ammonia spraying grid pipe is generally directly drilled on the surface for ammonia spraying, and the spraying holes are easy to block, so that the ammonia spraying grid pipe is not convenient to maintain and reduces the denitration efficiency.

Therefore, it is necessary to invent a liquid ammonia injection grid for SCR denitration to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquid ammonia spraying grid for SCR denitration to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a liquid ammonia spraying grid for SCR denitration comprises a plurality of grid pipes, wherein the grid pipes are connected to form an ammonia spraying grid, the grid pipes are communicated with one another, ammonia spraying nozzles are arranged at the intersections of the grid pipes, mounting convex blocks are fixedly connected to the middle parts of two sides of the ammonia spraying grid, the two mounting convex blocks are symmetrically arranged, fixed concave boxes matched with the mounting convex blocks are arranged on the two mounting convex blocks, and the fixed concave boxes are fixedly mounted on the inner wall of a flue;

the one end middle part of fixed spill case is equipped with the knob, the knob is close to the one end of one side middle part fixed connection rotation axis of fixed spill case, the other end of rotation axis inserts fixed spill case and the two-way screw rod of fixedly connected with, the equal threaded connection in both ends of two-way screw rod has the thread bush, two the thread bush symmetry sets up, two the equal fixedly connected with in one side of thread bush ends the slider that changes, two the equal fixedly connected with L shape joint pole of opposite side of thread bush.

Optionally, both ends of the bidirectional screw rod are rotatably connected with the inner wall of the fixed concave box through bearings.

Optionally, the inner wall of the fixed concave box is provided with a rotation stopping sliding groove matched with the rotation stopping sliding block, and the rotation stopping sliding block is connected with the rotation stopping sliding groove in a sliding mode.

Optionally, a clamping groove matched with the L-shaped clamping rod is formed in the side wall of the mounting convex block, and one end of the L-shaped clamping rod penetrates through the fixed concave box and extends into the clamping groove.

Optionally, the bottom of the ammonia spraying nozzle is provided with an external thread, the grid pipe is provided with an internal thread matched with the ammonia spraying nozzle, and the ammonia spraying nozzle is in threaded connection with the grid pipe.

The utility model discloses a technological effect and advantage:

1. the utility model discloses a cooperation of knob, rotation axis, two-way screw rod, thread bush, spline slider, spline spout, L shape joint pole and joint groove is used, is convenient for carry out dismouting, change to the ammonia injection grid, and the convenience is maintained the ammonia injection grid, satisfies the operation requirement.

2. The utility model discloses a be provided with and spout the ammonia shower nozzle to fix on the grid pipe through threaded connection's mode, the convenience is carried out the dismouting to spouting the ammonia shower nozzle, is convenient for maintain, avoids taking place to block up, guarantees the efficiency of denitration.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic sectional view of the fixed concave box structure of the present invention.

FIG. 3 is a schematic sectional view of the ammonia spraying nozzle of the present invention.

In the figure: 1. a grid tube; 2. an ammonia spray nozzle; 3. installing a convex block; 4. fixing the concave box; 5. a rotation knob; 6. a rotating shaft; 7. a bidirectional screw; 8. a threaded sleeve; 9. a rotation stopping slide block; 10. a rotation stopping chute; 11. an L-shaped clamping and connecting rod; 12. a clamping groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; may be a mechanical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The utility model provides a liquid ammonia spraying grid for SCR denitration as shown in figures 1-3, which comprises a grid pipe 1;

by shown in figure 1, grid pipe 1 is provided with a plurality ofly, and a plurality of grid pipe 1 are connected and are formed the ammonia injection grid, and a plurality of grid pipe 1 communicate each other, and a plurality of grid pipe 1's intersection all is equipped with the ammonia injection shower nozzle 2, and the equal fixedly connected with installation convex block 3 in both sides middle part of ammonia injection grid, two installation convex block 3 symmetries set up, all are equipped with rather than the fixed spill case 4 of adaptation on two installation convex blocks 3, and fixed spill case 4 fixed mounting is on the flue inner wall.

As shown in figure 2, a rotary button 5 is arranged in the middle of one end of a fixed concave box 4, the rotary button 5 is close to one end of a fixed concave box 4, one side of the middle of one side of the fixed concave box is fixedly connected with a rotary shaft 6, the other end of the rotary shaft 6 is inserted into the fixed concave box 4 and is fixedly connected with a bidirectional screw 7, both ends of the bidirectional screw 7 are rotatably connected with the inner wall of the fixed concave box 4 through bearings, so that the bidirectional screw 7 can be conveniently and stably rotated, both ends of the bidirectional screw 7 are respectively in threaded connection with a threaded sleeve 8, the two threaded sleeves 8 are symmetrically arranged, one side of the two threaded sleeves 8 is respectively and fixedly connected with a rotation stopping slide block 9, a rotation stopping slide groove 10 matched with the rotation stopping slide block 9 is arranged on the inner wall of the fixed concave box 4, the rotation stopping slide block 9 is in sliding connection with the rotation stopping slide groove 10, the structure is simple and practical, an L-shaped clamping rod, one end of the L-shaped clamping rod 11 penetrates through the fixed concave box 4 and extends into the clamping groove 12.

By shown in fig. 3, the bottom of spouting ammonia shower nozzle 2 is equipped with the external screw thread, is equipped with on grid pipe 1 with spout the internal thread of ammonia shower nozzle 2 adaptation, spouts ammonia shower nozzle 2 and grid pipe 1 threaded connection, conveniently carries out the dismouting to spouting ammonia shower nozzle 2, is convenient for maintain, avoids taking place to block up, guarantees the efficiency of denitration.

This practical theory of operation:

when needs are dismantled the ammonia injection grid, rotate two knob 5 in proper order, knob 5 drives rotation axis 6 and rotates, rotation axis 6 drives two-way screw rod 7 and rotates, two-way screw rod 7 drives two thread bush 8 and does the removal of keeping away from each other simultaneously, thread bush 8 removes along the direction of two-way screw rod 7 length under the effect of splining slider 9, thread bush 8 drives splining slider 9 and slides in splining spout 10, meanwhile, thread bush 8 drives L shape joint pole 11 and does the removal of keeping away from joint groove 12, when L shape joint pole 11 breaks away from joint groove 12, alright lift off the ammonia injection grid and maintain or change, structural design is reasonable, the dismouting is convenient.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a liquid ammonia spraying ammonia grid for SCR denitration, includes grid pipe (1), its characterized in that: the ammonia spraying grid is characterized in that a plurality of grid pipes (1) are arranged, the grid pipes (1) are connected to form an ammonia spraying grid, the grid pipes (1) are communicated with one another, ammonia spraying nozzles (2) are arranged at the intersections of the grid pipes (1), mounting convex blocks (3) are fixedly connected to the middle portions of two sides of the ammonia spraying grid, the two mounting convex blocks (3) are symmetrically arranged, fixing concave boxes (4) matched with the mounting convex blocks are arranged on the two mounting convex blocks (3), and the fixing concave boxes (4) are fixedly mounted on the inner wall of a flue;

the one end middle part of fixed spill case (4) is equipped with knob (5), knob (5) are close to the one end of one side middle part fixed connection rotation axis (6) of fixed spill case (4), the other end of rotation axis (6) inserts fixed spill case (4) and two-way screw rod of fixedly connected with (7), the equal threaded connection in both ends of two-way screw rod (7) has thread bush (8), two thread bush (8) symmetry sets up, two the equal fixedly connected with of one side of thread bush (8) splines slider (9), two the equal fixedly connected with L shape joint pole (11) of opposite side of thread bush (8).

2. The liquid ammonia injection grid for SCR denitration of claim 1, wherein:

and two ends of the bidirectional screw (7) are rotatably connected with the inner wall of the fixed concave box (4) through bearings.

3. The liquid ammonia injection grid for SCR denitration of claim 1, wherein:

the inner wall of the fixed concave box (4) is provided with a rotation stopping sliding groove (10) matched with the rotation stopping sliding block (9), and the rotation stopping sliding block (9) is in sliding connection with the rotation stopping sliding groove (10).

4. The liquid ammonia injection grid for SCR denitration of claim 1, wherein:

the side wall of the installation convex block (3) is provided with a clamping groove (12) matched with the L-shaped clamping rod (11), and one end of the L-shaped clamping rod (11) penetrates through the fixed concave box (4) and extends into the clamping groove (12).

5. The liquid ammonia injection grid for SCR denitration of claim 1, wherein:

the bottom of spouting ammonia shower nozzle (2) is equipped with the external screw thread, be equipped with on grid pipe (1) with spout the internal thread of ammonia shower nozzle (2) adaptation, spout ammonia shower nozzle (2) and grid pipe (1) threaded connection.