Soot blower for denitration catalyst

Abstract

The utility model discloses a soot blower for a denitration catalyst, which relates to the field of flue gas purification and comprises a flue, a plurality of bosses are arranged at the bottom of the flue, ventilation pipelines are arranged in the bosses in a penetrating manner, the top ends of the ventilation pipelines are positioned in the flue, and a heat exchange pipeline is arranged between the top ends of the two ventilation pipelines; a sealing mechanism is arranged between the bottom of the boss and the ventilation pipeline, and a pipeline support assembly is arranged on the outer side of the bottom end of the ventilation pipeline. A support is arranged below any ventilation pipeline, a plurality of denitration catalyst soot blowing pipelines are arranged in the support, and gas pipe joints are arranged at the ends of the denitration catalyst soot blowing pipelines. The heat exchange pipeline is formed by connecting a plurality of pipe sections end to end, and each pipe section is of a wavy structure. According to the utility model, a manner of combining preheating denitration purge compressed air with acetylene ash removal is adopted, so that the phenomenon of ash accumulation and blockage on the surface of a denitration catalyst surface can be solved from the source, and further, the facility treatment is smoother, and the glass production is more stable.

Description

Technical Field

[0001] The utility model relates to the field of flue gas purification, in particular to a soot blowing device for a denitration catalyst. Background Art

[0002] DeNOx catalysts are materials used in selective catalytic reduction technology to reduce nitrogen oxide emissions generated during combustion. Nitrogen oxides are atmospheric pollutants that have negative impacts on the environment and human health.

[0003] With increasingly stringent environmental protection controls, the current denitrification units are operating at overload for a long time. Due to the increasingly serious blockage of the denitrification catalysts, the denitrification efficiency is low, the amount of denitrification agents used is excessive, and the resulting excessive pressure in the glass production kiln has caused problems, which have greatly increased production risks and operating costs.

[0004] When compressed air at room temperature comes into contact with the flue gas inside the denitrification system, condensation occurs. This causes impurities in the flue gas to accumulate on the catalyst surface. Over time, this accumulation increases, leading to catalyst surface blockage. The greater the blockage, the less ammonia gas contacts the catalyst surface. To meet the data requirements, the denitrification agent dosage is increased, resulting in the formation of large amounts of ammonia salts on the catalyst surface, further exacerbating the blockage.

[0005] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0006] In response to the problems in the related art, the utility model proposes a soot blowing device for a denitration catalyst to overcome the above technical problems existing in the existing related art.

[0007] To this end, the specific technical solutions adopted in this utility model are as follows:

[0008] A sootblowing device for a denitration catalyst comprises a flue, wherein a plurality of bosses are provided at the bottom of the flue, ventilation pipes are inserted in the bosses, the top ends of the ventilation pipes are located in the flue, and a heat exchange pipe is provided between the top ends of two ventilation pipes; a sealing mechanism is provided between the bottom of the bosses and the ventilation pipes, and a pipe bracket assembly is provided on the outer side of the bottom end of the ventilation pipes; a bracket is provided below any ventilation pipe, and a plurality of denitration catalyst sootblowing pipelines are provided in the bracket, and an air pipe joint is provided at the end of the denitration catalyst sootblowing pipeline; the heat exchange pipe is composed of a plurality of pipe sections connected at the head, and the pipe sections have a wavy structure.

[0009] Furthermore, in order to achieve a sealing effect in the ventilation duct and prevent smoke from leaking into the surrounding environment, the sealing mechanism includes a sealing ring arranged at the bottom end of the boss and located on the outside of the ventilation duct, and a baffle is provided at the bottom end of the sealing ring; a plurality of first bolts are provided in the baffle, and the top end of the first bolt is connected to the bottom end of the boss through a first nut; the outer contour of the sealing ring is a truncated cone structure, and the cross-sectional width of the sealing ring gradually decreases in the direction approaching the flue.

[0010] Furthermore, in order to maintain the stability of the heat exchange pipe, the pipe support assembly includes a first arc hoop and a second arc hoop symmetrically arranged on the outside of the bottom of the ventilation pipe, a plurality of second bolts are arranged in the first arc hoop, and one end of the second bolt is connected to the second arc hoop through a second nut; the second arc hoop is connected to one end of the fixed point connecting frame; a plurality of third bolts are arranged in the second arc hoop, and the third bolts are connected to the fixed point connecting frame through a third nut.

[0011] The beneficial effects of the utility model are:

[0012] (1) The utility model adopts a method of combining preheated denitrification purge compressed air with acetylene ash removal, which can solve the problem of ash accumulation and blockage on the surface of denitrification catalyst from the source, thereby making the treatment facilities smoother and the glass production more stable without increasing the amount of denitrification agent.

[0013] (2) By setting up a sealing mechanism, a sealing effect can be achieved at the ventilation duct to prevent smoke from leaking into the surrounding environment; by setting up a pipe bracket assembly, the ventilation duct can be firmly clamped by the first arc hoop and the second arc hoop, the second arc hoop is connected to the fixed point connecting frame, and is connected to the external fixed body through the fixed point connecting frame, so that the ventilation duct and the heat exchange duct connected thereto can remain stable.

[0014] (3) The heat exchange pipe of the present invention is composed of several pipe sections connected at the front end, and the pipe sections have a wavy structure, which increases the surface area of the heat exchange pipe and improves the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a structural schematic diagram of a sootblowing device for a denitration catalyst according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1A partial enlarged view of point A in the middle;

[0018] Figure 3 This is a schematic structural diagram of a soot blowing device for a denitration catalyst in a flue according to an embodiment of the present utility model;

[0019] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle.

[0020] In the picture:

[0021] 1. Flue; 2. Boss; 3. Ventilation duct; 4. Heat exchange duct; 5. Sealing mechanism; 501. Sealing ring; 502. Baffle; 503. First bolt; 504. First nut; 6. Pipe support assembly; 601. First arc hoop; 602. Second arc hoop; 603. Second bolt; 604. Second nut; 605. Fixed point connecting frame; 606. Third bolt; 607. Third nut; 7. Bracket; 8. DeNOx catalyst soot blowing line; 9. Air pipe joint. DETAILED DESCRIPTION

[0022] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0023] According to an embodiment of the present utility model, a sootblowing device for a denitration catalyst is provided.

[0024] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-4 As shown, the soot blowing device for the denitration catalyst according to the embodiment of the present invention includes a flue 1, a plurality of bosses 2 are provided at the bottom of the flue 1, ventilation pipes 3 are inserted in the bosses 2, the top ends of the ventilation pipes 3 are located in the flue 1, and a heat exchange pipe 4 is provided between the top ends of the two ventilation pipes 3; a sealing mechanism 5 is provided between the bottom of the boss 2 and the ventilation pipe 3, and a pipe support assembly 6 is provided on the outside of the bottom end of the ventilation pipe 3; a support 7 is provided below any ventilation pipe 3, a plurality of denitration catalyst soot blowing pipelines 8 are provided in the support 7, and an air pipe joint 9 is provided at the end of the denitration catalyst soot blowing pipeline 8; the heat exchange pipe 4 is composed of a plurality of pipe sections connected at the head, and the pipe sections are a wavy structure (i.e., a snake-coil structure).

[0025] Figure 1The flue 1 shown in the figure is only a part of the flue gas duct in actual application, and the flue gas duct is connected to an external object, for example, by using a suspension system to support the flue gas duct. Figure 1 The dotted arrow below the middle ventilation duct 3 indicates that the preheated gas leaves the ventilation duct 3 .

[0026] When the denitration catalyst sootblowing line 8 is in use, acetylene gas and oxygen are delivered to a mixer via their respective gas supply devices. In the mixer, the acetylene and oxygen are mixed in a specific proportion to form a combustible gas mixture. The mixed combustible gas enters the denitration catalyst sootblowing line 8 through a gas pipe connector 9. The denitration catalyst sootblowing line 8 is a high-temperature, high-pressure piping system capable of withstanding the high temperatures and shock waves generated by acetylene combustion. An ignition device is installed at the end of the sootblowing line or at a specific location. When the combustible gas mixture enters the denitration catalyst sootblowing line 8, it is ignited by the ignition device, generating a combustion reaction. The ignited acetylene-oxygen mixture burns within the denitration catalyst sootblowing line 8, generating high-temperature, high-pressure gas. This high-pressure gas creates a shock wave. The gas blown through the denitration catalyst sootblowing line 8 generates a 7 kg impact force at the center above the denitration catalyst surface and a 4 kg impact force around the periphery (within the safety tolerance of the denitration device). This promptly disperses any condensed soot clumps on the denitration catalyst surface.

[0027] With the help of the above scheme, the utility model adopts a combination of preheated denitrification purge compressed air and acetylene ash removal, which can solve the problem of dust accumulation and blockage on the surface of the denitrification catalyst from the source, thereby making the treatment facilities smoother and the glass production more stable without increasing the amount of denitrification agent.

[0028] In one embodiment, for the above-mentioned sealing mechanism 5, the sealing mechanism 5 includes a sealing ring 501 arranged at the bottom end of the inside of the boss 2 and located on the outside of the ventilation duct 3, and a baffle 502 is provided at the bottom end of the sealing ring 501; a plurality of first bolts 503 are provided in the baffle 502, and the top of the first bolt 503 is connected to the bottom end of the boss 2 through a first nut 504; the outer contour of the sealing ring 501 is a truncated cone structure, and the cross-sectional width of the sealing ring 501 gradually decreases in the direction approaching the flue 1, so that a sealing effect can be achieved at the ventilation duct 3 to prevent smoke from leaking into the surrounding environment.

[0029] The working principle of sealing mechanism 5: The outer contour of sealing ring 501 is a truncated cone, and its cross-sectional width gradually decreases as it approaches flue 1. This allows sealing ring 501 to gradually and tightly fit the gap between the outer wall of ventilation duct 3 and the inner wall of boss 2 during installation, forming an effective seal. Once baffle 502 is connected to boss 2, sealing ring 501 will not loosen.

[0030] In one embodiment, for the above-mentioned pipe support assembly 6, the pipe support assembly 6 includes a first arc hoop 601 and a second arc hoop 602 symmetrically arranged on the outside of the bottom of the ventilation pipe 3, a plurality of second bolts 603 are arranged in the first arc hoop 601, and one end of the second bolt 603 is connected to the second arc hoop 602 through a second nut 604; the second arc hoop 602 is connected to one end of the fixed point connecting frame 605; a plurality of third bolts 606 are arranged in the second arc hoop 602, and the third bolt 606 is connected to the fixed point connecting frame 605 through a third nut 607, so that the ventilation pipe 3 is firmly clamped by the first arc hoop 601 and the second arc hoop 602, the second arc hoop 602 is connected to the fixed point connecting frame 605, and is connected to the external fixed body through the fixed point connecting frame 605, so that the ventilation pipe 3 and the heat exchange pipe 4 connected thereto can remain stable.

[0031] The pipe support assembly 6 operates as follows: A first arc-shaped hoop 601 and a second arc-shaped hoop 602 are symmetrically positioned on the outside of the bottom of the ventilation duct 3. Connected by a second bolt 603 and a second nut 604, they securely clamp the ventilation duct 3. A fixed point connector 605 connects to an external fixed object, such as a wall, ensuring overall stability of the pipe support assembly 6 and, consequently, the ventilation duct 3 held by the pipe support assembly 6.

[0032] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.

[0033] Of the two ventilation ducts 3, one located away from the denitration catalyst sootblowing line 8 serves as the compressed air inlet, while the other serves as the outlet. In practical applications, the outlet duct is equipped with a jet pipe with jet holes that periodically sprays air toward the ammonia nozzle to dislodge ash clumps. A heat exchange duct 4 is installed in the flue 1 (at 400°C) and preheats the room-temperature compressed air to above 200°C. This prevents condensation when the compressed air contacts the flue gas during catalyst purge, preventing the catalyst surface from clogging due to the accumulation of flue gas impurities.

[0034] Acetylene soot blowing: DeNOx catalyst soot blowing lines 8 are evenly installed on each layer of the deNOx catalyst. These lines generate a 7kg impact force at the center of the deNOx catalyst surface and a 4kg impact force around the periphery (within the deNOx device's safety tolerance). This promptly disperses any condensed soot clumps on the catalyst surface. The preheated compressed air then purges the deNOx catalyst surface, leaving it cleaner and less prone to clogging, ensuring smoother flue gas flow. The preheated compressed air can reach 300°C and a pressure of 10kg.

[0035] In summary, the present invention adopts a method of combining preheated denitrification purge compressed air with acetylene dust removal, which can solve the problem of dust accumulation and blockage on the surface of the denitrification catalyst from the source, thereby making the treatment facilities smoother and the glass production more stable, without increasing the amount of denitrification agent. By setting a sealing mechanism 5, a sealing effect can be achieved at the ventilation pipe 3 to prevent smoke from leaking into the surrounding environment; by setting a pipe support assembly 6, the ventilation pipe 3 is firmly clamped by the first arc hoop 601 and the second arc hoop 602, the second arc hoop 602 is connected to the fixed point connecting frame 605, and is connected to the external fixed body through the fixed point connecting frame 605, so that the ventilation pipe 3 and the heat exchange pipe 4 connected thereto can remain stable. The heat exchange pipe 4 of the present invention is composed of a plurality of pipe sections connected at the head, and the pipe sections are of a wavy structure, which increases the surface area of the heat exchange pipe 4 and improves the heat exchange efficiency.

[0036] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sootblowing device for a denitration catalyst, comprising a flue (1), characterized in that: The bottom of the flue (1) is provided with a plurality of bosses (2), a ventilation pipe (3) is inserted into the bosses (2), the top end of the ventilation pipe (3) is located in the flue (1), and a heat exchange pipe (4) is provided between the top ends of two ventilation pipes (3); A sealing mechanism (5) is provided between the bottom of the boss (2) and the ventilation pipe (3), and a pipe support assembly (6) is provided on the outer side of the bottom end of the ventilation pipe (3); A bracket (7) is provided below any of the ventilation pipes (3), a plurality of denitration catalyst soot blowing pipelines (8) are provided in the bracket (7), and an air pipe joint (9) is provided at the end of each of the denitration catalyst soot blowing pipelines (8).

2. A sootblowing device for a denitration catalyst according to claim 1, characterized in that: The heat exchange pipe (4) is composed of a plurality of pipe sections connected at the head, and the pipe sections have a wavy structure.

3. A sootblowing device for a denitration catalyst according to claim 1 or 2, characterized in that: The sealing mechanism (5) comprises a sealing ring (501) arranged at the bottom end inside the boss (2) and located outside the ventilation duct (3), and a baffle (502) is provided at the bottom end of the sealing ring (501).

4. A sootblowing device for a denitration catalyst according to claim 3, characterized in that: A plurality of first bolts (503) are provided in the baffle (502), and the top ends of the first bolts (503) are connected to the bottom end of the boss (2) via first nuts (504).

5. A sootblowing device for a denitration catalyst according to claim 4, characterized in that: The outer contour of the sealing ring (501) is a truncated cone structure, and the cross-sectional width of the sealing ring (501) gradually decreases in a direction approaching the flue (1).

6. A sootblowing device for a denitration catalyst according to claim 1, characterized in that: The pipe support assembly (6) comprises a first circular arc hoop (601) and a second circular arc hoop (602) symmetrically arranged on the outside of the bottom of the ventilation pipe (3); a plurality of second bolts (603) are arranged in the first circular arc hoop (601), and one end of the second bolt (603) is connected to the second circular arc hoop (602) via a second nut (604); The second circular arc hoop (602) is connected to one end of the fixed point connecting frame (605).

7. A sootblowing device for a denitration catalyst according to claim 6, characterized in that: A plurality of third bolts (606) are provided in the second arc hoop (602), and the third bolts (606) are connected to the fixed point connection frame (605) via third nuts (607).

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