Shock wave soot blower of waste incineration boiler

Abstract

The utility model discloses a shock wave soot blower of a waste incineration boiler, and relates to the technical field of waste incineration. The shock wave soot blower of the waste incineration boiler comprises an explosion tank, and the explosion tank is communicated with the boiler through a soot blowing pipe; the dust blowing device further comprises an air curtain assembly used for forming an air curtain wall in the dust blowing pipe, and the air curtain wall is used for cutting off airflow flowing between the explosion tank and the boiler. According to the shock wave soot blowing device of the waste incineration boiler, by arranging the air curtain assembly, an air curtain wall can be formed in the soot blowing pipe so as to cut off air flow between the explosion tank and the boiler, backflow of acid gas in the boiler is effectively blocked, the acid gas is prevented from condensing in the explosion tank to form strong acid, and the service life of the boiler is prolonged. Therefore, corrosion to the explosion tank and equipment pipelines is reduced, the service life of equipment is prolonged, and the maintenance frequency and cost of the equipment are reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of waste incineration, in particular to a shock wave soot blowing device for a waste incineration boiler. BACKGROUND

[0002] In the operation process of a waste incineration power plant, the waste heat boiler as one of the key equipment, the economizer surface is easy to accumulate dust, which not only reduces the heat transfer efficiency of the boiler, causes energy waste, but also may cause equipment failure, increases maintenance cost and downtime. Therefore, regular and effective cleaning of the dust accumulated on the surface of the economizer is crucial to ensure the normal operation of the waste incineration power plant.

[0003] At present, the commonly used soot blowing technology in waste incineration power plants is shock wave soot blowing technology. This technology mixes acetylene and air, ignites in an explosion tank, generates high-pressure high-speed shock waves, and then introduces the shock waves into the boiler through a soot blowing pipe to spray and blow the surface of the economizer, thereby achieving the purpose of removing dust.

[0004] However, after the soot blowing is completed, since the soot blowing pipe is directly connected to the inside of the boiler, the acidic gas in the boiler is easy to backflow into the explosion tank through the soot blowing pipe. These acidic gases will form strong acid after condensation in the explosion tank, causing serious corrosion to the inner wall of the explosion tank and related equipment pipelines, shortening the service life of the equipment, increasing the maintenance frequency and cost of the equipment. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present application is to provide a shock wave soot blowing device for a waste incineration boiler, which solves the problem of corrosion of the explosion tank caused by the backflow of acidic gas in the boiler into the explosion tank.

[0006] The technical solution adopted by the present application to solve its technical problems is:

[0007] A shock wave soot blowing device for a waste incineration boiler, comprising an explosion tank, the explosion tank is communicated with a boiler through a soot blowing pipe; further comprising a wind curtain assembly for forming a wind curtain wall in the soot blowing pipe, the wind curtain wall is used to block the airflow flow between the explosion tank and the boiler.

[0008] Further, the wind curtain wall is a conical structure that blows wind towards the boiler.

[0009] Further, the wind curtain assembly comprises a first air supply pipe and a first nozzle, the first nozzle is arranged in the soot blowing pipe, the first end of the first air supply pipe is communicated with the first nozzle, and the second end of the first air supply pipe is arranged outside the soot blowing pipe. The airflow ejected from the first nozzle forms the wind curtain wall in the soot blowing pipe.

[0010] Further, the first nozzle is provided with a conical spray channel, the small end of the spray channel is communicated with the first air supply pipe, and the large end of the spray channel is arranged towards the direction of the boiler.

[0011] Further, the air curtain assembly further comprises a first air blower communicated with the second end of the first air supply pipe.

[0012] Further, the air curtain assembly comprises a second air supply pipe and a second air outlet pipe, the first end of the second air supply pipe is communicated with the second air outlet pipe, the second end of the second air supply pipe is arranged outside the blowing pipe, the second air outlet pipe is a semicircular structure with two closed ends extending along the circumference of the blowing pipe and connected with the inner wall of the blowing pipe, and a long strip-shaped spray slot extending along the length direction of the second air outlet pipe is arranged on the pipe wall of the second air outlet pipe, and the airflow sprayed from the long strip-shaped spray slot forms the air curtain wall in the blowing pipe.

[0013] Further, the air curtain assembly further comprises a second air blower communicated with the second end of the second air supply pipe.

[0014] Further, the second air outlet pipe is provided with a conical guide cylinder towards one side of the explosion tank, the large end of the conical guide cylinder is connected with the blowing pipe, and the small end of the conical guide cylinder is connected with the second air outlet pipe.

[0015] Further, the blowing pipe is transversely arranged below the explosion tank, one end of the blowing pipe is provided with a blocking plate, the other end of the blowing pipe is communicated with the boiler, and the bottom of the explosion tank is communicated with the inner cavity of the blowing pipe.

[0016] Further, the bottom of the explosion tank is communicated with the inner cavity of the blowing pipe through a flange joint assembly.

[0017] The beneficial effects of the present application are as follows:

[0018] The shock blowing device of the garbage incineration boiler provided by the embodiment of the present application can form an air curtain wall in the blowing pipe to cut off the airflow flow between the explosion tank and the boiler, effectively block the backflow of the acidic gas in the boiler, prevent the acidic gas from condensing to form strong acid in the explosion tank, thereby reducing the corrosion of the explosion tank and the equipment pipeline, prolonging the service life of the equipment, and reducing the maintenance frequency and cost of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 is a structural schematic diagram of a shock wave soot blowing device of a waste incineration boiler provided by the embodiments of the present application;

[0021] Figure 2 is a first structural schematic diagram of a wind curtain assembly;

[0022] Figure 3 is a second structural schematic diagram of a wind curtain assembly;

[0023] Figure 4 is a structural schematic diagram of a second air outlet pipe.

[0024] Reference signs:

[0025] 1 - explosion tank;

[0026] 11 - air inlet pipe;

[0027] 2 - soot blowing pipe;

[0028] 3 - boiler;

[0029] 4 - wind curtain wall;

[0030] 5 - wind curtain assembly;

[0031] 51 - first air supply pipe;

[0032] 52 - first nozzle;

[0033] 521 - injection channel;

[0034] 53 - first air blower;

[0035] 54 - second air supply pipe;

[0036] 55 - second air outlet pipe;

[0037] 551 - long strip-shaped injection slot;

[0038] 56 - second air blower;

[0039] 6 - conical guide cylinder;

[0040] 7 - blocking plate;

[0041] 8 - flange connection pipe assembly. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0043] In the description of the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer" and the like is the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does 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 cannot be understood as a limitation on the present application. Unless otherwise specified, the above orientation description can be flexibly arranged in the actual application process under the condition of meeting the relative positional relationship shown in the drawings.

[0044] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] Referring to Figure 1 The embodiment of the present application provides a shock wave soot blowing device for a waste incineration boiler, which comprises an explosion tank 1, the explosion tank 1 is communicated with a boiler 3 through a soot blowing pipe 2; further comprising a wind curtain assembly 5 for forming a wind curtain wall 4 in the soot blowing pipe 2, the wind curtain wall 4 is used for cutting off the airflow flow between the explosion tank 1 and the boiler 3.

[0046] The explosion tank 1 can be a vertical storage tank, and an air inlet pipe 11 is arranged on the explosion tank 1. The mixed gas after mixing of acetylene and air can enter the explosion tank 1 through the air inlet pipe 11 to be ignited and exploded to generate a high-pressure high-speed shock wave. The two ends of the soot blowing pipe 2 can be an inlet end and an outlet end respectively, the inlet end of the soot blowing pipe 2 is communicated with the explosion tank 1, and the outlet end of the soot blowing pipe 2 is communicated with the boiler 3. The soot blowing pipe 2 can introduce the shock wave in the explosion tank 1 into the boiler 3 to spray and blow the surface of the economizer in the boiler 3, so as to remove the soot on the surface of the economizer. The wind curtain assembly 5 is used for blowing wind into the soot blowing pipe 2 and forming a wind curtain wall 4, and the wind curtain wall 4 can cut off the airflow flow between the explosion tank 1 and the boiler 3.

[0047] The shock wave soot blowing device for waste incineration boiler provided by the embodiments of the present application is used for cleaning the accumulated soot on the surface of the economizer in the boiler. The specific cleaning process is as follows: the mixed gas after the mixing of acetylene and air is sent into the explosion tank 1 through the air inlet pipe 11 to ignite and explode, a high-pressure and high-speed shock wave is generated in the explosion tank 1, the shock wave is introduced into the boiler 3 through the soot blowing pipe 2 to spray and blow the surface of the economizer, thereby removing the accumulated soot on the surface of the economizer. When the soot cleaning is completed, the air curtain assembly is used to blow air into the soot blowing pipe 2 to form the air curtain wall 4 in the soot blowing pipe 2 to separate the airflow between the explosion tank 1 and the boiler 3, thereby preventing the acidic gas in the boiler 3 from flowing back to the explosion tank 1 through the soot blowing pipe 2.

[0048] Therefore, the shock wave soot blowing device for waste incineration boiler provided by the embodiments of the present application not only can clean the accumulated soot on the surface of the economizer in the boiler by using the shock wave, but also can form the air curtain wall 4 in the soot blowing pipe 2 by arranging the air curtain assembly 5 to separate the airflow between the explosion tank 1 and the boiler 3, effectively prevent the backflow of the acidic gas in the boiler 3, prevent the strong acid formed by the condensation of the acidic gas in the explosion tank 1, thereby reducing the corrosion of the explosion tank 1 and the equipment pipeline, prolonging the service life of the equipment, and reducing the maintenance frequency and cost of the equipment.

[0049] The air curtain wall 4 can be a planar structure perpendicular to the axis of the soot blowing pipe 2, and the number and position of the air curtain wall 4 in the soot blowing pipe 2 can be arbitrarily set as long as the backflow of the acidic gas in the boiler 3 to the explosion tank 1 can be blocked by the air curtain wall 4, which is not specifically limited herein.

[0050] In some embodiments, referring to Figure 1 , the air curtain wall 4 is a conical structure that blows air towards the direction of the boiler 3. For example, in the direction of air blowing, the cross-sectional size of the conical structure can gradually increase.

[0051] Correspondingly, the air curtain wall 4 in the conical structure can effectively guide the airflow to the direction of the boiler 3 to form uniform airflow distribution and spray the surface of the economizer, thereby reducing the speed of the accumulated soot on the surface of the economizer and reducing the soot cleaning frequency. When the acidic gas in the boiler 3 flows to the position of the air curtain wall 4, it can be rapidly diffused and blown back into the boiler 3, reducing the residence and backflow of the acidic gas at the position of the air curtain wall 4, thereby further preventing the backflow of the acidic gas to the explosion tank 1 and reducing the corrosion of the equipment.

[0052] In some embodiments, referring to Figure 2 , the air curtain assembly 5 includes a first air supply pipe 51 and a first nozzle 52, the first nozzle 52 is arranged in the soot blowing pipe 2, the first end of the first air supply pipe 51 is in communication with the first nozzle 52, and the second end of the first air supply pipe 51 is arranged outside the soot blowing pipe 2. The airflow sprayed from the first nozzle 52 forms the air curtain wall 4 in the soot blowing pipe 2.

[0053] In operation, external air is introduced into the first air supply pipe 51 through the second end of the first air supply pipe 51 and is sprayed out from the first nozzle 52 to form the air curtain wall 4 in the blowing pipe 2, so as to effectively prevent the acid gas in the boiler 3 from flowing back into the explosion tank 1. Depending on the arrangement position of the first nozzle 52 in the blowing pipe 2 and the spraying direction of the air flow, the air flow sprayed out from the first nozzle 52 can form a planar air curtain wall 4 or a conical air curtain wall 4.

[0054] For example, the first nozzle 52 can include a plurality of nozzles. The plurality of nozzles can be arranged at the top of the inner cavity of the blowing pipe 2 and spray air flow downward to form the air curtain wall 4. The plurality of nozzles can also be arranged at the bottom of the inner cavity of the blowing pipe 2 and spray air flow upward to form the air curtain wall 4. The plurality of nozzles can also be arranged at the center of the blowing pipe 2 and spray air flow toward the inner surface of the blowing pipe 2 to form the air curtain wall 4.

[0055] Referring to Figure 2 , the first nozzle 52 can also include one nozzle arranged at the center of the blowing pipe 2. The first nozzle 52 is provided with a conical spraying channel 521, the small end of the spraying channel 521 is in communication with the first air supply pipe 51, and the large end of the spraying channel 521 is arranged toward the direction of the boiler 3.

[0056] In operation, external air is introduced into the first nozzle 52 through the first air supply pipe 51 and is sprayed out from the spraying channel 521 toward the inner surface of the blowing pipe 2 to form a conical air curtain wall 4 in the blowing pipe 2. This structure can reduce the number of nozzles arranged, save the installation space occupied by the arrangement of the nozzles, and thus increase the flow area of the air flow in the blowing pipe 2.

[0057] In some embodiments, referring to Figure 2 , the air curtain assembly 5 further includes a first air blower 53 in communication with the second end of the first air supply pipe 51.

[0058] In operation, the first air blower 53 is used to introduce external air into the first air supply pipe 51 and spray the air out from the first nozzle 52 to form the air curtain wall 4 in the blowing pipe 2. Accordingly, the first air blower 53 can provide stable air flow to ensure that the air curtain wall 4 forms uniform air flow distribution in the blowing pipe 2. In other embodiments, the second end of the first air supply pipe 51 can be in communication with an air pipe network in the plant to provide stable air flow by using the air pipe network.

[0059] In some embodiments, referring to Figure 3 , Figure 4The air curtain assembly 5 comprises a second air supply pipe 54 and a second air outlet pipe 55. The first end of the second air supply pipe 54 is in communication with the second air outlet pipe 55, and the second end of the second air supply pipe 54 is arranged outside the soot blowing pipe 2. The second air outlet pipe 55 is a semicircular structure with two closed ends extending along the circumference of the soot blowing pipe 2 and connected with the inner wall of the soot blowing pipe 2. The pipe wall of the second air outlet pipe 55 is provided with a long strip-shaped injection slot 551 extending along the length direction thereof. The air flow injected from the long strip-shaped injection slot 551 forms the air curtain wall 4 in the soot blowing pipe 2.

[0060] In operation, the external air is sent into the second air outlet pipe 55 through the second air supply pipe 54 and is injected from the long strip-shaped injection slot 551 to form the air curtain wall 4 in the soot blowing pipe 2, thereby effectively preventing the acidic gas in the boiler 3 from flowing back into the explosion tank 1. The direction of the air flow injected from the long strip-shaped injection slot 551 can be perpendicular to the axis of the soot blowing pipe 2 or can be arranged at an acute angle.

[0061] In some embodiments, referring to Figure 3 The air curtain assembly 5 further comprises a second air blower 56 in communication with the second end of the second air supply pipe 54.

[0062] In operation, the second air blower 56 is used to send the external air into the second air outlet pipe 55 through the second air supply pipe 54 and inject the air from the long strip-shaped injection slot 551 to form the air curtain wall 4 in the soot blowing pipe 2. Accordingly, the second air blower 56 can provide stable air flow to ensure that the air curtain wall 4 forms uniform air flow distribution in the soot blowing pipe 2. In other embodiments, the second end of the second air supply pipe 54 can be in communication with the air pipe network in the plant to use the air pipe network to provide stable air flow.

[0063] In some embodiments, referring to Figure 3 The side of the second air outlet pipe 55 facing the explosion tank 1 is provided with a conical guide cylinder 6. The large end of the conical guide cylinder 6 is connected with the soot blowing pipe 2, and the small end of the conical guide cylinder 6 is connected with the second air outlet pipe 55. The cross-sectional dimension of the conical guide cylinder 6 gradually decreases in the direction from the explosion tank 1 to the boiler 3. Accordingly, when the shock wave is used for soot blowing, the conical guide cylinder 6 is used to guide the shock wave to avoid the shock wave colliding with the second air outlet pipe 55 to form large resistance, and also serves to protect the second air outlet pipe 55 to improve the service life of the second air outlet pipe 55.

[0064] In some embodiments, referring to Figure 1 The soot blowing pipe 2 is arranged transversely below the explosion tank 1. One end of the soot blowing pipe 2 is provided with a blocking plate 7, and the other end of the soot blowing pipe 2 is in communication with the boiler 3. The bottom of the explosion tank 1 is in communication with the inner cavity of the soot blowing pipe 2. For example, the bottom of the explosion tank 1 is provided with a shock wave outlet, and the top of the soot blowing pipe 2 is provided with a shock wave inlet adjacent to the blocking plate 7. The shock wave outlet is in communication with the shock wave inlet through a connecting pipe.

[0065] For example, referring to Figure 2 The bottom of the explosion tank 1 is communicated with the inner cavity of the soot blowing pipe 2 through the flange pipe assembly 8. Accordingly, the detachable connection between the explosion tank 1 and the soot blowing pipe 2 can be realized by using the flange pipe assembly 8, so as to facilitate the disassembly and maintenance of the two.

[0066] The above merely is the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any change or replacement that can be easily thought of by those skilled in the art within the technical range disclosed by the present application shall be covered in the protection scope of the present application.

Claims

1. A shock wave soot blowing device for a waste incineration boiler, comprising an explosion tank (1) which is in communication with a boiler (3) through a soot blowing pipe (2); characterized in that, The air curtain assembly (5) is arranged to form an air curtain wall (4) in the blowing pipe (2) to separate the explosion tank (1) from the boiler (3).

2. The waste incineration boiler shock purging device according to claim 1, characterized in that The air curtain wall (4) is a conical structure arranged to blow air towards the boiler (3).

3. A shock wave soot blower for a waste incineration boiler according to claim 1 or 2, characterized in that The air curtain assembly (5) comprises a first air supply pipe (51) and a first nozzle (52), the first nozzle (52) is arranged in the blowing pipe (2), the first end of the first air supply pipe (51) is communicated with the first nozzle (52), and the second end of the first air supply pipe (51) is arranged outside the blowing pipe (2), the air flow blown out of the first nozzle (52) forms the air curtain wall (4) in the blowing pipe (2).

4. The waste incineration boiler shock purging device according to claim 3, characterized in that The first nozzle (52) is provided with a conical jet channel (521), the small end of the jet channel (521) is communicated with the first air supply pipe (51), and the large end of the jet channel (521) is arranged towards the boiler (3).

5. The waste incinerator boiler shock purging device according to claim 3, characterized in that, The air curtain assembly (5) further comprises a first air blower (53) communicated with the second end of the first air supply pipe (51).

6. The shock purging device of a waste incineration boiler according to claim 1 or 2, characterized in that, The air curtain assembly (5) comprises a second air supply pipe (54) and a second air outlet pipe (55), the first end of the second air supply pipe (54) is communicated with the second air outlet pipe (55), the second end of the second air supply pipe (54) is arranged outside the blowing pipe (2), the second air outlet pipe (55) is a semicircular structure with two closed ends extending along the circumference of the blowing pipe (2) and connected with the inner wall of the blowing pipe (2), and the pipe wall of the second air outlet pipe (55) is provided with a long strip-shaped jet slot (551) extending along the length direction thereof, the air flow blown out of the long strip-shaped jet slot (551) forms the air curtain wall (4) in the blowing pipe (2).

7. A shock wave soot blower for a waste incineration boiler according to claim 6, characterized in that The air curtain assembly (5) further comprises a second air blower (56) communicated with the second end of the second air supply pipe (54).

8. The waste incinerator boiler shock purging device according to claim 6, characterized in that, The second air outlet pipe (55) is provided with a conical guide cylinder (6) towards one side of the explosion tank (1), the large end of the conical guide cylinder (6) is connected with the blowing pipe (2), and the small end of the conical guide cylinder (6) is connected with the second air outlet pipe (55).

9. The waste incinerator boiler shock purging device according to claim 1, characterized in that, The blowing pipe (2) is arranged transversely below the explosion tank (1), one end of the blowing pipe (2) is provided with a blocking plate (7), the other end of the blowing pipe (2) is communicated with the boiler (3), and the bottom of the explosion tank (1) is communicated with the inner cavity of the blowing pipe (2).

10. The waste incinerator boiler shock purging device according to claim 9, characterized in that, The bottom of the explosion tank (1) is communicated with the inner cavity of the blowing pipe (2) through a flange joint assembly (8).

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