Soot blowing device of denitration equipment

Abstract

The utility model discloses a soot blower of denitration equipment, which comprises a power piece, an air inlet guide pipe and a plurality of soot blowing seats arranged below the air inlet guide pipe and communicated with the air inlet guide pipe, and further comprises a plurality of guide sliding rods arranged above the air inlet guide pipe at intervals and parallel to the air inlet guide pipe, and the soot blowing seats are perpendicular to the air inlet guide pipe; a plurality of gas ejector pipes are arranged at the bottom of each soot blowing seat at intervals in the length direction of the soot blowing seats; the air inlet guide pipe and the air blowing base are provided with a plurality of sliding assemblies used for being in sliding connection with the corresponding guide sliding rods. The power piece is used for driving the air inlet guide pipe and the soot blowing base to slide in the length direction of the guide sliding rod in a reciprocating mode, in the reciprocating sliding process, high-pressure air fed through the air inlet guide pipe is sprayed out of the air spraying pipe to act on an inlet of the reactor, then accumulated soot is comprehensively removed, and the final soot blowing and dust removing effect is ensured.

Description

Technical Field

[0001] The utility model relates to a soot blowing device for denitration equipment, belonging to the technical field of soot blowing for denitration equipment. Background Art

[0002] At present, SCR denitration equipment is widely used in large combustion facilities such as thermal power plants, industrial boilers, cement processing plants, and industrial furnaces. Through the action of catalysts, flue gas containing nitrogen oxides is converted into harmless nitrogen and water vapor, thereby reducing the impact on the environment and meeting the national environmental protection requirements.

[0003] The SCR denitration equipment mainly includes: a reactor, which is responsible for realizing the conversion process of nitrogen oxides. A catalyst layer is provided inside the reactor, and when the flue gas passes through the catalyst layer, it comes into contact with the catalyst and reacts. An ammonia injection system, which is responsible for injecting ammonia or other reducing agents into the reactor to provide the required reducing agent for the conversion of NO x . A flue gas system, which introduces the flue gas containing nitrogen oxides into the reactor to ensure sufficient contact between the flue gas and the catalyst and realize the reaction. A control system, which is responsible for monitoring and adjusting parameters such as the temperature, pressure, and gas flow rate inside the reactor to ensure the stability and efficiency of the denitration process.

[0004] For the above SCR denitration equipment, due to the high dust concentration in cement flue gas, and at the same time, the dust has high viscosity, large hardness, and complex special effects, so during actual use, the dust is likely to block the air inlet of the reactor. Once the air inlet of the reactor is blocked by dust, it will lead to difficult full contact between nitrogen oxides and the catalyst, resulting in an unsatisfactory denitration effect. Content of the Utility Model

[0005] The purpose of the utility model is to provide a soot blowing device for denitration equipment, which has good soot blowing effect, can effectively improve the situation that the air inlet of the reactor is blocked by dust, and thus can ensure the denitration effect of the reactor.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A soot blowing device for denitration equipment includes a power component, an air inlet conduit, and a plurality of soot blowing seats arranged below the air inlet conduit and communicating with the air inlet conduit. It also includes a plurality of guiding sliding rods arranged at intervals above the air inlet conduit and parallel to the air inlet conduit. The soot blowing seats are perpendicularly arranged to the air inlet conduit;

[0008] Along the length direction of the soot blowing seats, a plurality of jet pipes are arranged at intervals at the bottom of each soot blowing seat; Multiple sets of sliding components for sliding connection with the corresponding guiding sliding rods are arranged on the air inlet conduit and the blowing seats;

[0009] The power component is used to drive the intake duct and the soot blowing seat to reciprocate along the length direction of the guiding slide bar. During the reciprocating movement, the high-pressure gas sent through the intake duct is ejected from the jet pipe and acts on the reactor inlet, thereby removing the accumulated ash.

[0010] Preferably, the sliding assembly includes a sliding seat. A pulley that rotates relative to the sliding seat is installed inside the sliding seat, and the bottom of the sliding seat is fixedly connected to the corresponding intake duct or the soot blowing seat.

[0011] The guiding slide bar passes through the sliding seat and contacts the bottom surface of the pulley, which is used to convert sliding friction into rolling friction.

[0012] Preferably, a plurality of cross braces and diagonal braces are arranged between adjacent soot blowing seats.

[0013] Preferably, both the cross braces and the diagonal braces are telescopic rods, and fasteners are used to prevent the telescopic rods from shrinking.

[0014] Preferably, along the length direction of the soot blowing seat, two protective baffles are symmetrically arranged on the outer side wall of the soot blowing seat.

[0015] Preferably, a plurality of receiving grooves are formed at the bottom of the soot blowing seat, and the jet pipes are arranged in the corresponding receiving grooves.

[0016] Preferably, a plurality of covers corresponding to the receiving grooves are rotatably arranged at the bottom of the soot blowing seat on one side of the receiving groove through a rotating shaft; a torsion spring is sleeved on each rotating shaft, one end of the torsion spring abuts against the cover, and the other end abuts against the soot blowing seat.

[0017] When not performing soot blowing, under the action of the torsion spring, the cover covers the corresponding receiving groove.

[0018] When performing soot blowing, under the action of the high-pressure gas ejected from the jet pipe, the cover disengages from covering the corresponding receiving groove.

[0019] Preferably, a weight-reducing groove is formed on the cover.

[0020] Preferably, the rotating shafts are arranged at intervals along the length direction of the soot blowing seat, and adjacent rotating shafts are located on different sides.

[0021] The beneficial effects of the present utility model are as follows:

[0022] The high-pressure air flow ejected from the bottom opening of the jet pipe can disperse the dust blocked at the reactor inlet; by controlling the reciprocating movement of the soot blowing seat, the soot blowing range of the jet pipe can be ensured, thereby achieving full coverage of the reactor inlet and ensuring the final soot blowing and dust removal effect; in addition, under the action of the pulley, the sliding of the soot blowing seat can be made more smooth.

[0023] Adjacent sootblowing seats are connected to each other through cross braces and diagonal braces, which can further improve the stability and reliability of the sootblowing seats and ensure the stability of the sootblowing seats during operation;

[0024] When sootblowing, the high-pressure air flow ejected from the air injection pipe can open the cover plate covering the outside of the opening of the receiving groove. At this time, the high-pressure air flow can smoothly carry out the sootblowing work; when the sootblowing work is completed, under the torsional force of the torsion spring, the cover plate will be pushed to rotate towards the direction close to the opening of the receiving groove until the opening of the receiving groove is covered, so as to effectively prevent external dust from flowing back into the sootblowing seat through the air injection pipe, and at the same time greatly reduce the probability of the air jet opening of the air injection pipe being blocked. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a sootblowing device installed in a denitration equipment reactor;

[0026] Figure 2 It is a partial schematic diagram of the sootblowing device;

[0027] Figure 3 It is a schematic structural diagram of the sootblowing seat;

[0028] Figure 4 It is an exploded view of the cover plate.

[0029] The meanings of the main reference numerals in the drawings are as follows:

[0030] 1. Guide slide bar; 2. Sootblowing seat; 20. Protective baffle; 21. Receiving groove; 22. Cover plate; 23. Torsion spring; 24. Weight reduction groove; 3. Air injection pipe; 4. Intake conduit; 5. Power component; 6. Sliding seat; 60. Pulley; 7. Cross bar; 70. Fastener; 8. Diagonal brace. Detailed Implementation Modes

[0031] The following specifically introduces the present utility model in conjunction with the drawings and embodiments.

[0032] This embodiment provides a sootblowing device for denitration equipment. Referring to Figure 1 、 Figure 2 , it includes multiple groups of guide slide bars 1 fixedly arranged above the reactor. In this embodiment, two groups of guide slide bars 1 are used as an example for illustration. The number of each group of guide slide bars 1 is three. The three guide slide bars 1 in the same group are parallel to each other, and adjacent guide slide bars 1 are arranged at intervals along the horizontal direction in sequence. Three sootblowing seats 2 are slidably arranged on each group of guide slide bars 1, and the sootblowing seats 2 are arranged at intervals along the length direction of the guide slide bars 1.

[0033] As Figure 3 、 Figure 4As shown in the figure, a plurality of air jet pipes 3 with openings facing downward towards the reactor are provided at the bottom of the soot blowing seat 2. The air jet pipes 3 are in internal communication with the soot blowing seat 2, and the air jet pipes 3 are arranged at intervals in the length direction of the soot blowing seat 2 where they are located. Each soot blowing seat 2 in the same group is connected to the same intake duct 4, and air is supplied to each soot blowing seat 2 in the same group through the intake duct 4 at the same time. Finally, the high-pressure air flow ejected from the air jet openings of the air jet pipes 3 can blow away the dust blocked at the reactor intake port.

[0034] As Figure 2 、 Figure 3 shown in the figure, a sliding seat 6 is suspended on the guiding slide bar 1. A pulley 60 is rotatably provided at the upper end of the sliding seat 6. The rotation axis of the pulley 60 is perpendicular to the length direction of the guiding slide bar 1. The pulley 60 is rotatably mounted above the guiding slide bar 1. The lower end of the sliding seat 6 is fixedly connected to the corresponding soot blowing seat 2 or intake duct 4. The soot blowing seat 2 and the intake duct 4 are slidably arranged below the guiding slide bar 1 along the length direction of the guiding slide bar 1 through the sliding seat 6. The pulley 60 can reduce the friction force when the soot blowing seat 2 slides, so that the soot blowing seat 2 can slide more smoothly below the guiding slide bar 1.

[0035] As Figure 1 、 Figure 2 shown in the figure, it further includes a power member 5 installed outside the reactor. In this embodiment, the power member 5 can be an expansion cylinder. The movable end of the power member 5 is used to extend into the reactor and is fixedly connected to the corresponding intake duct 4. In this embodiment, two groups of power members 5 are provided, and the power members 5 are used to drive the corresponding intake ducts 4 and a group of soot blowing seats 2 to slide along the length direction of the guiding slide bar 1 in the reactor respectively.

[0036] As Figure 1 、 Figure 2 shown in the figure, a cross brace 7 is installed between adjacent soot blowing seats 2 on the same group of guiding slide bars 1. The fixed end of the cross brace 7 is fixedly installed on one soot blowing seat 2, and the movable end of the cross brace 7 is fixed outside the other soot blowing seat 2. A fastener 70 is threadedly connected to the outside of the fixed end of the cross brace 7. In this embodiment, the fastener 70 is a bolt. The movable end of the cross brace 7 is screwed and fixed in the fixed end of the cross brace 7 through the fastener 70. By adjusting the length of the cross brace 7, the connection between the soot blowing seats 2 with different spacings can be adapted.

[0037] As Figure 1 、 Figure 2As shown, a diagonal brace 8 is also installed between adjacent soot blowing seats 2 on the same group of guiding slide rods 1. The diagonal brace 8 also adopts a freely telescopic structure, and the specific structure can refer to the structure of the cross brace 7. The diagonal brace 8 is inclined, and an included angle is formed between the diagonal brace 8 and the adjacent cross brace 7. The specific range of the included angle is 30°-60°. The adjacent two soot blowing seats 2 are connected to each other through the cross brace 7 and the diagonal brace 8, so as to further improve the stability and reliability of the soot blowing seat 2 and ensure the stability of the soot blowing seat 2 during operation.

[0038] As Figure 3 , Figure 4 shown, two protective baffles 20 are fixedly installed on the outer side wall of the soot blowing seat 2. The two protective baffles 20 are symmetrically arranged on the two opposite sides of the soot blowing seat 2. The length of the protective baffle 20 extends along the length direction of the soot blowing seat 2, and the protective baffle 20 is inclined and bent downward. The two side protective baffles 20 can effectively prevent the solid impurities carried in the dust from falling onto the air injection pipe 3 from top to bottom, so as to protect the air injection pipe 3.

[0039] As Figure 3 , Figure 4 shown, a plurality of receiving grooves 21 corresponding to the air injection pipes 3 one by one are arranged at the bottom of the soot blowing seat 2. The receiving grooves 21 are arranged at intervals along the length direction of the soot blowing seat 2. Each air injection pipe 3 is respectively arranged in the corresponding receiving groove 21. The receiving grooves 21 can reduce the area of the air injection pipes 3 exposed outside the soot blowing seat 2, so as to also play a certain protective role for the air injection pipes 3.

[0040] As Figure 3 , Figure 4 shown, a cover plate 22 corresponding to the receiving groove 21 one by one is rotatably arranged outside the soot blowing seat 2. The cover plate 22 is used to cover the opening of the respective corresponding receiving groove 21. The cover plates 22 are arranged at intervals along the length direction of the soot blowing seat 2, and the rotation axes of the cover plates 22 are parallel to each other. The rotation axes of the adjacent cover plates 22 are alternately arranged on both sides of the opening of the receiving groove 21. A torsion spring 23 is sleeved on the rotation axis of the cover plate 22. One end of the torsion spring 23 abuts against the cover plate 22, and the other end of the torsion spring 23 abuts against the soot blowing seat 2. The torsion spring 23 is used to push the cover plate 22 to cover the opening of the respective corresponding receiving groove 21. It should be mentioned that the impact force of the high-pressure air flow ejected from the air injection pipe 3 is much greater than the restoring force of the torsion spring 23. A weight reduction groove 24 is integrally formed on the side wall of the cover plate 22 facing away from the air injection pipe 3. By reducing the weight of the cover plate 22, it is ensured that the torsion spring 23 can smoothly push the respective cover plate 22 to close the opening of the receiving groove 21.

[0041] The high-pressure air flow ejected from the air jet pipe 3 can open the cover plate 22 covering the outside of the opening of the receiving groove 21. At this time, the high-pressure air flow can smoothly perform the soot blowing work. After the soot blowing work is completed, the cover plate 22 will be pushed by the torsion force of the torsion spring 23 to rotate in the direction close to the opening of the receiving groove 21 until the opening of the receiving groove 21 is covered, so as to effectively prevent external dust from flowing back into the soot blowing seat 2 through the air jet pipe 3, and at the same time, it can greatly reduce the probability of the air jet opening of the air jet pipe 3 being blocked.

[0042] The implementation principle is as follows: When the air inlet of the reactor is blocked, the power component 5 is started to drive the soot blowing seat 2 to slide along the length direction of the guiding slide rod 1. During this period, air is supplied into the soot blowing seat 2 through the air inlet conduit 4. Finally, the high-pressure air flow will be ejected from the bottom opening of the air jet pipe 3, and the ejected high-pressure air flow can disperse the dust blocked at the air inlet of the reactor. By controlling the reciprocating movement of the soot blowing seat 2, the soot blowing range of the air jet pipe 3 can be ensured, and then the air inlet of the reactor can be fully covered, ensuring the final soot blowing and dust removal effect; in addition, under the action of the pulley 60, the sliding of the soot blowing seat 2 can be made smoother. After the soot blowing work is completed, the cover plate 22 will be pushed by the torsion force of the torsion spring 23 to rotate in the direction close to the opening of the receiving groove 21 until the opening of the receiving groove 21 is covered, so as to effectively prevent external dust from flowing back into the soot blowing seat 2 through the air jet pipe 3, and at the same time, it can greatly reduce the probability of the air jet opening of the air jet pipe 3 being blocked.

[0043] The above is only the preferred implementation mode of the utility model patent. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the utility model patent, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the utility model patent.

Claims

1. A soot blowing device for denitration equipment, characterized in that, It includes a power component, an intake duct, and a plurality of soot blowing seats arranged below the intake duct and communicating with the intake duct. It also includes a plurality of guiding slide rods arranged at intervals above the intake duct and parallel to the intake duct. The soot blowing seats are arranged perpendicular to the intake duct. Along the length direction of the soot blowing seats, a plurality of jet pipes are arranged at intervals at the bottom of each soot blowing seat. A plurality of sliding assemblies for slidingly connecting with the corresponding guiding slide rods are arranged on the intake duct and the soot blowing seats. The power component is used to drive the intake duct and the soot blowing seats to reciprocally slide along the length direction of the guiding slide rods. During the reciprocal sliding process, the high-pressure gas sent through the intake duct is ejected from the jet pipes and acts on the reactor inlet to remove the accumulated ash.

2. The soot blowing device for the denitration equipment according to claim 1, characterized in that The sliding assembly includes a sliding seat. A pulley rotatable with the sliding seat is installed inside the sliding seat. The bottom of the sliding seat is fixedly connected to the corresponding intake duct or soot blowing seat. The guiding slide rod penetrates through the sliding seat and contacts the bottom surface of the pulley, which is used to convert sliding friction into rolling friction.

3. The soot blowing device for the denitration equipment according to claim 1, characterized in that, A plurality of cross braces and diagonal braces are arranged between adjacent soot blowing seats.

4. The soot blowing device for the denitration equipment according to claim 3, wherein, Both the cross braces and the diagonal braces are telescopic rods, and fasteners are used to prevent the telescopic rods from contracting.

5. The sootblowing device for the denitration equipment according to claim 1, characterized in that, Along the length direction of the soot blowing seats, two protective baffles are symmetrically arranged on the outer side walls of the soot blowing seats.

6. The sootblowing device of the denitration equipment according to claim 1, characterized in that, A plurality of accommodating grooves are formed at the bottom of the soot blowing seats, and the jet pipes are arranged in the corresponding accommodating grooves.

7. The sootblowing device of the denitration equipment according to claim 1, characterized in that, On the bottom of the soot blowing seat on one side of the accommodating groove, a plurality of covers corresponding to the accommodating grooves are rotatably arranged through a rotating shaft. A torsion spring is sleeved on each rotating shaft. One end of the torsion spring abuts against the cover, and the other end abuts against the soot blowing seat. When not blowing soot, under the action of the torsion spring, the cover covers the corresponding accommodating groove. When blowing soot, under the action of the high-pressure gas ejected from the jet pipes, the cover is separated from covering the corresponding accommodating groove.

8. The sootblowing device of the denitration equipment according to claim 7, characterized in that, A weight-reducing groove is formed on the cover.

9. The sootblowing device of the denitration equipment according to claim 7, characterized in that, The rotating shafts are arranged at intervals along the length direction of the soot blowing seats, and adjacent rotating shafts are located on different sides.

Images