Adjustable sludge atomizing lance for waste incinerator

Abstract

The utility model relates to a kind of adjustable sludge atomization spray gun of waste incinerator, including the atomization pipe, sludge pipe and cooling air pipe that are sequentially sleeved from inside to outside, sludge pipe rear end projects cooling air pipe rear end, and atomization pipe rear end projects sludge pipe rear end;Venturi tube structure is provided at the front end of sludge pipe, and atomization pipe front and rear position is adjustable and atomization pipe front end is provided with the atomization nozzle that extends to the middle of Venturi tube structure.The utility model adjustable sludge atomization spray gun structure of waste incinerator is novel, reasonable in design, good in adaptability, adjustable spraying distance and atomization effect, timely adjust sludge injection condition, adapt to different hearth cross-sectional area and working condition change;With cooling function, prevent spray gun from high-temperature ablation in actual operation;And dismounting is convenient, adjustable spray gun insertion depth, applicable to different waste incinerator of furnace wall thickness.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration power generation technology, and in particular to an adjustable sludge atomizing spray gun for a waste incinerator. Background Technology

[0002] Municipal sludge is a byproduct of urban wastewater treatment. It is characterized by high water content, low calorific value, high organic matter content, high biological pollution content, and high heavy metal content. Its composition is complex and its properties are unstable.

[0003] With the acceleration of urbanization in my country, the amount of sludge produced by sewage treatment plants is increasing year by year. The country's growing emphasis on environmental protection and sustainable development has made sludge treatment a crucial part of urban environmental governance. Currently, incineration is the most thorough method for sludge disposal. Through high-temperature incineration, the organic matter in the sludge is pyrolyzed and oxidized, thereby significantly reducing the volume and weight of the sludge, achieving sludge reduction and harmlessness.

[0004] Sludge co-incineration technology mainly includes two forms: drying followed by co-incineration and direct co-incineration. The wet sludge direct injection process has obvious advantages in terms of cost, environmental protection, process adaptability and portability of modification. How to atomize and disperse sludge with high water content and unstable properties and inject it evenly into the furnace is the key factor to improve the sludge incineration effect.

[0005] Currently available sludge spraying devices are not suitable for waste incinerators with small furnace cross-sectional areas and large variations in furnace operating conditions. They suffer from uneven material spraying, easy spraying onto furnace walls leading to water-cooled wall tube rupture, and localized cooling of flue gas temperature, which fails to meet environmental protection requirements. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide an adjustable sludge atomizing spray gun for a waste incinerator with a novel structure, reasonable design, and good adaptability. This gun can adjust the spraying distance and atomization effect, and adjust the sludge injection situation in a timely manner to adapt to different furnace cross-sectional areas and operating conditions.

[0007] This utility model is achieved by the following scheme: an adjustable sludge atomizing spray gun for a waste incinerator, comprising an atomizing tube, a sludge tube, and a cooling air duct arranged sequentially from the inside out, with the rear end of the sludge tube extending beyond the rear end of the cooling air duct, and the rear end of the atomizing tube extending beyond the rear end of the sludge tube; a Venturi tube structure is provided at the front end of the sludge tube, the front and rear positions of the atomizing tube are adjustable, and an atomizing nozzle extending to the middle of the Venturi tube structure is provided at the front end of the atomizing tube.

[0008] Furthermore, the sludge pipe's Venturi tube structure consists of an inlet cylindrical section, a contraction section, a throat, and a diffusion section arranged sequentially from back to front; an annular interlayer cavity is formed between the cooling air duct and the sludge; the front end of the cooling air duct is connected to the front end of the diffusion section of the sludge pipe; the diffusion section of the sludge pipe is provided with several cooling air holes evenly distributed circumferentially and communicating with the interlayer cavity; and the rear end of the cooling air duct is connected to an air inlet pipe.

[0009] Furthermore, the sludge pipe is equipped with a cleaning water interface and a sludge interface at its rear end.

[0010] Furthermore, the sludge pipe is provided with an end cap at the rear end, which is threadedly connected to the rear end of the sludge pipe, and an O-ring seal is provided inside the end cap to abut against the rear end face of the sludge pipe.

[0011] Furthermore, the end cap has a threaded hole in the middle, the rear end of the atomizing tube extends out from the threaded hole of the end cap, the rear end of the atomizing tube has an external thread that is threadedly engaged with the threaded hole of the end cap, and the rear end of the atomizing tube is threadedly connected to a locking nut and a washer that abut against the rear end of the end cap.

[0012] Furthermore, the atomizing tube is fixedly connected to a cross-shaped support slide near its front end, which slides back and forth with the sludge tube.

[0013] Furthermore, the front end of the atomizing tube is provided with an external thread, and the atomizing nozzle includes an inner threaded sleeve that is threadedly connected to the front end of the atomizing tube and a guide cone located at the center of the front end of the inner threaded sleeve. The guide cone and the front end of the inner threaded sleeve are fixedly connected by four connecting ribs arranged in a cross shape.

[0014] Furthermore, the cooling duct is fitted with an adjusting sleeve that slides with it. A fixing flange is welded onto the adjusting sleeve, and a threaded hole is provided on the adjusting sleeve, with a locking screw inside the threaded hole for locking and fixing the cooling duct.

[0015] Compared with the prior art, the present invention has the following advantages: The adjustable sludge atomizing spray gun of the present invention has a novel structure, reasonable design, good adaptability, adjustable spraying distance and atomization effect, timely adjustment of sludge injection situation, and adaptability to different furnace cross-sectional areas and working conditions; it has a cooling function to prevent the spray gun from being burned by high temperature in actual operation; and it is easy to disassemble and assemble, and the spray gun insertion depth can be adjusted, making it suitable for waste incinerators with different furnace wall thicknesses.

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through specific embodiments and related drawings. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the sludge atomizing spray gun according to an embodiment of this utility model; Figure 2This is a schematic diagram of the atomizing nozzle according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the atomizing nozzle according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the end cap of an embodiment of this utility model; Figure 5 This is a cross-sectional view of the end cap of an embodiment of this utility model; Detailed Implementation

[0018] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] like Figures 1-5 As shown, an adjustable sludge atomizing spray gun for a waste incinerator is characterized by comprising an atomizing tube 1, a sludge tube 8, and a cooling air duct 7 arranged sequentially from the inside out. The rear end of the sludge tube 8 extends beyond the rear end of the cooling air duct 7, and the rear end of the atomizing tube 1 extends beyond the rear end of the sludge tube 8. A Venturi tube structure is provided at the front end of the sludge tube 8. The front and rear positions of the atomizing tube 1 are adjustable, and an atomizing nozzle 9 extending to the middle of the Venturi tube structure is provided at the front end of the atomizing tube 1. This utility model of sludge atomizing spray gun can effectively and uniformly disperse and spray sludge with high water content and unstable properties, solving the problems of uneven material spraying in existing waste incinerators, easy spraying onto the furnace wall leading to water-cooled wall tube rupture, and easy local cooling of flue gas temperature that fails to meet environmental protection requirements. It also has a cooling function to prevent the spray gun from being burned by high temperature during actual operation.

[0021] The rear end of the atomizing tube 1 is connected to components such as an electric valve, an inlet pressure gauge, a gas flow meter, and a gas source via a stainless steel flexible hose.

[0022] In this embodiment, the venturi tube structure of the sludge pipe 8 consists of an inlet cylindrical section, a contraction section, a throat, and a diffuser section arranged sequentially from back to front. An annular interlayer cavity is formed between the cooling air duct 7 and the sludge pipe 8. The front end of the cooling air duct 7 is connected to the front end of the diffuser section of the sludge pipe 8. The diffuser section of the sludge pipe 8 has several cooling air holes evenly distributed circumferentially and communicating with the interlayer cavity. The cooling air holes face the center and are inclined forward. The rear end of the cooling air duct 7 is connected to an air inlet pipe 5, which is connected to an air inlet pressure gauge and a cooling air source via a pipeline. When the atomizing nozzle 9 is located at the diffuser opening of the sludge pipe 8, the atomizing air and the cooling airflow form a shear structure, improving the atomization effect.

[0023] In this embodiment, the sludge pipe 8 is provided with a cleaning water interface 4 and a sludge interface 12 at its rear end. The sludge interface 12 is inclined backward to reduce the resistance of sludge transportation. The sludge interface is connected to the hydraulic switching valve and the sludge transportation system through a pipeline. The cleaning water interface 4 is connected to the industrial water system to facilitate cleaning of the sludge pipe 8 after the spray gun stops working. This prevents the sludge remaining in the sludge pipe 8 from hardening and causing the spray gun to become blocked after the spray gun stops operating, thus achieving self-cleaning.

[0024] In this embodiment, the sludge pipe 8 is provided with an end cap 3 at its rear end. The end cap 3 is threadedly connected to the rear end of the sludge pipe 8. An O-ring 11 is provided inside the end cap 3, which abuts against the rear end face of the sludge pipe 8. The inner side of the end cap is provided with an internal thread, and the rear end of the sludge pipe 8 is provided with an external thread. The end cap and the O-ring are used for the inspection and maintenance of the atomizing nozzle 9 and the sealing of the sludge pipe 8 to prevent sludge leakage and reduce maintenance workload.

[0025] In this embodiment, the end cap 3 has a threaded hole in the middle, and the rear end of the atomizing tube 1 extends out from the threaded hole of the end cap 3. The rear end of the atomizing tube 1 has an external thread that engages with the threaded hole of the end cap 3. The rear end of the atomizing tube 1 is threadedly connected to a locking nut 2 and a washer 10 that abut against the rear end of the end cap 3. By rotating the atomizing tube 1, the front and rear positions of the atomizing tube can be adjusted, that is, the position of the atomizing nozzle 9 at the front end of the atomizing tube 1 extending into the venturi tube structure can be adjusted, thereby adjusting the sludge spraying distance and the atomization effect.

[0026] In this embodiment, the atomizing tube 1 is fixedly connected to a cross-shaped support slide 13 near its front end, which slides back and forth with the sludge tube 8.

[0027] In this embodiment, the front end of the atomizing tube 1 is provided with an external thread, and the atomizing nozzle 9 includes an inner threaded sleeve threadedly connected to the front end of the atomizing tube 1 and a guide cone located at the center of the front end of the inner threaded sleeve. The guide cone and the front end of the inner threaded sleeve are fixedly connected by four connecting ribs arranged in a cross shape. Since the atomizing nozzle 9 is threadedly connected to the atomizing tube 1, the front and rear positions can be adjusted by rotating the atomizing nozzle 9, thereby adjusting the front and rear positions of the guide cone, changing the gap size between the guide cone and the Venturi tube structure, realizing the adjustment of the atomizing air volume, and realizing the adjustment of the sludge spraying distance and atomization effect.

[0028] In this embodiment, an adjusting sleeve is fitted around the cooling duct 7, and a fixing flange 6 is welded to the adjusting sleeve. The adjusting sleeve has a threaded hole with a locking screw inside for securing the cooling duct 7. The sludge atomizing spray gun is mounted on the waste incinerator via the fixing flange 6. When the locking screw is loosened, the cooling duct 7 can be slidably adjusted to regulate the depth to which the sludge spray gun extends into the waste incinerator. After adjustment, the locking screw is tightened.

[0029] This sludge atomizing spray gun is easy to install and adjust in terms of extension length, making it suitable for waste incinerators with small furnace cross-sectional areas and fluctuating furnace operating conditions. Compared to traditional spray guns, it allows for adjustment of spray distance and atomization effect through nozzle adjustment, adapting to variations in the cross-sectional area of ​​different waste incinerator furnaces. Furthermore, the cleaning water interface facilitates easy cleaning of the spray gun, significantly reducing the workload of disassembling and cleaning it in practical applications.

[0030] The sludge injection situation can be adjusted in a timely manner according to changes in furnace operating conditions, and the spray gun spray distance and atomization effect can be adjusted to ensure that all parameters of the waste incinerator meet environmental protection requirements. The structure is simple and easy to disassemble and assemble. The insertion depth of the spray gun can be adjusted by adjusting the fixed flange, and it is suitable for waste incinerators with different furnace wall thicknesses.

[0031] During operation, the spray gun's spray distance and atomization effect are adjusted by adjusting the position of the atomizing nozzle 9, and the insertion depth is adjusted by the adjusting sleeve. During operation, the sludge delivery rate is adjusted according to the furnace conditions to control the spray gun flow rate. When shut down, the spray gun performs self-cleaning, reducing manual workload. If, during operation, the atomizing compressed air is normal but the sludge pipeline pressure suddenly increases, the spray gun may be clogged. In this case, the hydraulic shut-off valve of the sludge pipeline can be closed to introduce cleaning water and clean the spray gun. If the problem persists, the detachable spray gun end cap can be used for disassembly and inspection to clear any blockages.

[0032] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0033] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integral molding process).

[0034] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0035] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An adjustable sludge atomizing spray gun for a waste incinerator, characterized in that: It includes an atomizing tube (1), a sludge tube (8) and a cooling air duct (7) arranged sequentially from the inside out. The rear end of the sludge tube (8) extends out of the rear end of the cooling air duct (7), and the rear end of the atomizing tube (1) extends out of the rear end of the sludge tube (8). The front end of the sludge tube (8) is provided with a Venturi tube structure. The front and rear positions of the atomizing tube (1) are adjustable, and the front end of the atomizing tube (1) is provided with an atomizing nozzle (9) extending to the middle of the Venturi tube structure.

2. The adjustable sludge atomizing spray gun for a waste incinerator according to claim 1, characterized in that: The Venturi tube structure of the sludge pipe (8) consists of an inlet cylindrical section, a contraction section, a throat and a diffusion section arranged sequentially from back to front; an annular interlayer cavity is formed between the cooling air pipe (7) and the sludge pipe (8); the front end of the cooling air pipe (7) is connected to the front end of the diffusion section of the sludge pipe (8); the diffusion section of the sludge pipe (8) is provided with several cooling air holes evenly distributed along the circumference and communicating with the interlayer cavity; the rear end of the cooling air pipe (7) is connected to the air inlet pipe (5).

3. The adjustable sludge atomizing spray gun for a waste incinerator according to claim 1, characterized in that: The sludge pipe (8) is provided with a cleaning water interface (4) and a sludge interface (12) at its rear end.

4. The adjustable sludge atomizing spray gun for a waste incinerator according to claim 1, characterized in that: The sludge pipe (8) is provided with an end cap (3) at the rear end. The end cap (3) is threadedly connected to the rear end of the sludge pipe (8). An O-ring (11) is provided inside the end cap (3) against the rear end face of the sludge pipe (8).

5. The adjustable sludge atomizing spray gun for a waste incinerator according to claim 4, characterized in that: The end cap (3) has a threaded hole in the middle. The rear end of the atomizing tube (1) extends out from the threaded hole of the end cap (3). The rear end of the atomizing tube (1) has an external thread that is threaded into the threaded hole of the end cap (3). The rear end of the atomizing tube (1) is threaded with a locking nut (2) and a washer (10) that abut against the rear end of the end cap (3).

6. The adjustable sludge atomizing spray gun for a waste incinerator according to claim 1, characterized in that: The atomizing tube (1) is fixedly connected to a cross support slide (13) near the front end, which slides back and forth with the sludge tube (8).

7. The adjustable sludge atomizing spray gun for a waste incinerator according to claim 1, characterized in that: The front end of the atomizing tube (1) is provided with an external thread, and the atomizing nozzle (9) includes an inner threaded sleeve that is threaded to the front end of the atomizing tube (1) and a guide cone located at the center of the front end of the inner threaded sleeve. The guide cone and the front end of the inner threaded sleeve are fixedly connected by four connecting ribs distributed in a cross shape.

8. The adjustable sludge atomizing spray gun for a waste incinerator according to claim 1, characterized in that: The cooling duct (7) is fitted with an adjusting sleeve that slides with it. A fixing flange (6) is welded on the adjusting sleeve. The adjusting sleeve has a threaded hole and a locking screw for locking the cooling duct (7) is provided in the threaded hole.

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