Efficient energy-saving sludge atomizing lance

Abstract

The utility model discloses a kind of high-efficiency energy-saving sludge atomization spray gun, it is related to sludge treatment equipment technical field, including: sludge pipe and nozzle;The sludge pipe includes outer tube and inner tube;At least part of the inner tube is arranged in the inside of the outer tube, the inner tube is formed with the outer tube between air inlet channel, the outer tube is provided with air inlet;The nozzle is arranged in one end of the outer tube;The utility model realizes the double effect of first dispersing and then rotating by the airflow that is sprayed from dispersing air guide hole and atomization air guide hole, so that sludge containing certain moisture is realized uniform atomization when being sprayed from nozzle, and uniformly atomized sludge particles can be in full contact with high-temperature flue gas in furnace, avoid the situation that sludge mass concentrates absorption local heat when traditional direct spray burns, can effectively maintain temperature distribution stable in furnace, prevent furnace temperature abnormal fluctuation, can guarantee the sustained and stable combustion condition in boiler.

Description

Technical Field

[0001] This application relates to the field of sludge treatment equipment technology, and in particular to a high-efficiency and energy-saving sludge atomizing spray gun. Background Technology

[0002] With the rapid expansion of the population, residential water consumption, especially urban water consumption, has increased significantly, leading to a surge in urban sewage treatment. Currently, urban sewage is mainly treated through centralized treatment. Although numerous sewage treatment plants have been built to improve treatment capacity, the process generates large amounts of complex sludge containing organic matter, heavy metals, parasite eggs, bacteria, viruses, and other harmful substances. Without proper treatment, this sludge can easily cause secondary pollution to the environment. Against this backdrop, the application model of sludge co-incineration with waste has emerged.

[0003] Currently, in the treatment of sludge at waste-to-energy plants, to eliminate complex pretreatment steps, shorten the treatment cycle, and reduce initial equipment investment costs, a common practice is to directly inject wet sludge that has not undergone deep dewatering into the incinerator for combustion. The core idea of ​​this method is to utilize the high temperature within the furnace to directly achieve the drying, carbonization, and oxidative combustion of the sludge, which theoretically simplifies the treatment process and reduces intermediate energy consumption.

[0004] However, this treatment method has a significant negative impact on boiler operation. Due to the high moisture content and uneven composition of the sludge, it rapidly absorbs localized heat when directly injected into the furnace, leading to an imbalance in the furnace temperature distribution and frequent abnormal temperature fluctuations. These temperature fluctuations not only disrupt the boiler's combustion conditions, affecting combustion efficiency and heat recovery, but can also cause problems such as coking and corrosion on the boiler's heating surfaces, seriously threatening boiler operational safety and significantly increasing equipment maintenance costs. Therefore, direct injection combustion is difficult to meet the demands of stable industrial production. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a high-efficiency and energy-saving sludge atomizing spray gun, which solves the problem that when sludge is directly sprayed into the furnace, it rapidly absorbs local heat, leading to an imbalance in the temperature distribution within the furnace and frequent abnormal fluctuations in furnace temperature.

[0006] This application provides a high-efficiency and energy-saving sludge atomizing spray gun, including: a sludge pipe and a nozzle;

[0007] The sludge pipe includes an outer pipe and an inner pipe;

[0008] At least a portion of the inner tube is disposed inside the outer tube, an air intake channel is formed between the inner tube and the outer tube, and an air inlet is provided on the outer tube;

[0009] The nozzle is disposed at one end of the outer tube, and the nozzle is provided with a nozzle inner cavity, which is in communication with the inner tube;

[0010] The nozzle is provided with at least one dispersing air guide hole, which is connected to the air inlet channel and the nozzle inner cavity;

[0011] The nozzle is provided with at least one atomizing gas guide hole, which is connected to the air inlet channel and the inner cavity of the nozzle.

[0012] In one feasible implementation, the end of the inner tube away from the nozzle extends to the outside of the outer tube, and the end is provided with a sludge inlet.

[0013] In one possible implementation, a connecting flange is provided at one end of the inner tube extending to the outside of the outer tube.

[0014] In one feasible implementation, the number of the dispersing air guide holes is three, and they are evenly distributed along the circumference of the nozzle.

[0015] In one feasible implementation, the angle between the dispersing air guide hole and the center line of the outer pipe is 30°-60°.

[0016] In one feasible implementation, the number of atomizing gas guide holes is 6, and they are evenly distributed along the circumference of the nozzle.

[0017] In one feasible implementation, the angle between the atomizing gas guide hole and the center line of the outer tube is 0°-180°.

[0018] In one feasible implementation, the dispersing gas guide hole is disposed between the atomizing gas guide hole and the inner tube.

[0019] In one feasible implementation, the pressure of the compressed air entering the intake passage is 0.2-0.6 MPa.

[0020] In one feasible implementation, an air inlet pipe is provided on the outer pipe at a position corresponding to the air inlet.

[0021] This utility model provides a high-efficiency and energy-saving sludge atomizing spray gun, which has the following beneficial effects:

[0022] By using airflow from both the dispersing and atomizing gas guide holes to achieve a dual effect of first dispersing and then rotating, the sludge containing a certain amount of moisture is uniformly atomized when sprayed from the nozzle. The uniformly atomized sludge particles can fully contact the high-temperature flue gas in the furnace, avoiding the situation where sludge clumps absorb local heat in concentrated areas as in traditional direct combustion. This effectively maintains a stable temperature distribution in the furnace and prevents abnormal temperature fluctuations. A stable furnace temperature ensures continuous and stable combustion conditions in the boiler, improving combustion efficiency and heat recovery, while also avoiding coking and corrosion problems on the boiler's heating surfaces caused by temperature fluctuations. This fundamentally reduces the risk of equipment failure and maintenance costs, ultimately meeting the core requirements of stable industrial production for sludge treatment processes. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the embodiments of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0024] Figure 1 A schematic diagram of the structure of a high-efficiency and energy-saving sludge atomizing spray gun provided for an embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the connection structure of the air inlet pipe of a high-efficiency and energy-saving sludge atomizing spray gun provided for an embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram of the connection structure of the inner tube of a high-efficiency and energy-saving sludge atomizing spray gun provided in an embodiment of this utility model.

[0027] In the diagram: 1. Sludge pipe; 101. Outer pipe; 102. Inner pipe; 1021. Air inlet; 103. Air inlet channel; 104. Sludge inlet; 2. Nozzle; 201. Dispersing air guide hole; 202. Atomizing air guide hole; 203. Nozzle inner cavity; 3. Air inlet pipe; 4. Connecting flange; 5. Compressed air pipe; 6. Compressed air supply device; 7. Sludge conveying pipeline; 8. Sludge conveying pump. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Furthermore, in this application, directional terms such as "upper," "lower," "inner," and "outer" are defined relative to the indicated placement of the components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the placement of the components in the accompanying drawings.

[0030] Currently, urban sewage is mainly treated through centralized treatment. Although many sewage treatment plants have been built to improve sewage treatment capacity, the treatment of urban sewage still faces considerable challenges because a large amount of sludge and residue are generated during the sewage treatment process. The sludge produced by municipal sewage has an extremely complex composition, including organic matter, heavy metals, parasite eggs, bacteria, and viruses. Currently, sludge is usually treated at waste incineration power plants.

[0031] When waste-to-energy plants process sludge, the sludge itself has a high moisture content and uneven composition. When directly injected into the furnace, it rapidly absorbs localized heat, leading to an imbalance in the furnace temperature distribution and frequent abnormal temperature fluctuations. These temperature fluctuations not only disrupt the combustion conditions within the boiler, affecting incineration efficiency and heat recovery, but can also cause problems such as coking and corrosion on the boiler's heating surfaces, seriously threatening boiler operational safety and significantly increasing equipment maintenance costs. Therefore, direct injection combustion is difficult to meet the demands of stable industrial production.

[0032] This invention provides a high-efficiency and energy-saving sludge atomizing spray gun to solve the problem that when sludge is directly sprayed into the furnace, it will quickly absorb local heat, resulting in an unbalanced temperature distribution in the furnace and frequent abnormal temperature fluctuations.

[0033] The embodiments of this application will now be described with reference to the accompanying drawings.

[0034] This application provides a high-efficiency and energy-saving sludge atomizing spray gun. Please refer to [link / reference]. Figure 1 , Figure 1 A schematic diagram of the structure of a high-efficiency and energy-saving sludge atomizing spray gun provided for an embodiment of this utility model is shown below. Figure 1 As shown, it includes: sludge pipe 1 and nozzle 2. Sludge pipe 1 is used to transport sludge to nozzle 2 and to make compressed air pass through nozzle 2 to agitate and atomize the sludge, so that the water-containing sludge enters the furnace evenly.

[0035] The sludge pipe 1 includes an outer pipe 101 and an inner pipe 102. At least a portion of the inner pipe 102 is disposed inside the outer pipe 101. An air intake channel 103 is formed between the inner pipe 102 and the outer pipe 101. An air inlet 1021 is provided on the outer pipe 101.

[0036] Compressed air enters the intake channel 103 through the intake port 1021. The inner tube 102 and the outer tube 101 are preferably arranged on the same axis to ensure the uniformity of the intake and the stable distribution of airflow. The connection between the inner tube 102 and the outer tube 101 includes, but is not limited to, welding.

[0037] In some embodiments, an air inlet pipe 3 is provided on the outer pipe 101 at a position corresponding to the air inlet 1021, and the outer pipe 101 and the air inlet pipe 3 can be fixed by welding.

[0038] Please see Figure 2 , Figure 2 A schematic diagram of the connection structure of the air inlet pipe of a high-efficiency and energy-saving sludge atomizing spray gun provided for an embodiment of this utility model is shown below. Figure 2 As shown, the intake pipe 3 is connected to the compressed air pipe 5 in the factory area. The connection methods between the intake pipe 3 and the compressed air pipe 5 in the factory area include, but are not limited to, flange connection, quick coupling connection, valve connection, etc. The compressed air supply device 6 (such as an air compressor) in the factory area delivers compressed air to the compressed air pipe 5, and then flows into the intake channel 103 through the intake pipe 3 and the air inlet 1021.

[0039] In some embodiments, the compressed air pressure entering the air intake channel 103 is 0.2-0.6 MPa, which can meet the treatment requirements of the sludge in the inner tube 102.

[0040] The nozzle 2 is located at one end of the outer tube 101. The nozzle 2 has a nozzle inner cavity 203, which is connected to the inner tube 102.

[0041] The nozzle 2 can be welded to one end of the outer tube 101, and at least part of the nozzle 2 can be located inside the outer tube 101, so that the nozzle 2 and the outer tube 101 can be stably connected. The nozzle inner cavity 203 is connected to the inner tube 102 so that when sludge is transported to the inner tube 102, the sludge can be transported to the nozzle inner cavity 203.

[0042] In some embodiments, one end of the inner tube 102 away from the nozzle 2 extends to the outside of the outer tube 101, and the end is provided with a sludge inlet 104.

[0043] Please see Figure 3 , Figure 3 A schematic diagram of the connection structure of the inner tube of a high-efficiency and energy-saving sludge atomizing spray gun provided for an embodiment of this utility model is shown below. Figure 3As shown, the sludge inlet 104 of the inner tube 102 is connected to the sludge conveying pipe 7, and the other end of the sludge conveying pipe 7 is connected to the sludge conveying pump 8. The sludge conveying pump 8 conveys water-containing sludge into the sludge conveying pipe 7 at a set pressure, and then conveys it to the inner tube 102 and the nozzle cavity 203 in sequence through the sludge inlet 104. For example, the pressure of the water-containing sludge conveyed by the sludge conveying pump 8 can be 0.1-1.5 MPa.

[0044] In some embodiments, a connecting flange 4 is provided at one end of the inner pipe 102 extending to the outside of the outer pipe 101. The sludge inlet 104 of the inner pipe 102 is connected to the sludge conveying pipeline 7 through the flange, which can effectively ensure the stability of the water-containing sludge during the conveying process.

[0045] The nozzle 2 is provided with at least one dispersing gas guide hole 201, which is connected to the air intake channel 103 and the nozzle inner cavity 203; the nozzle 2 is provided with at least one atomizing gas guide hole 202, which is connected to the air intake channel 103 and the nozzle inner cavity 203.

[0046] When compressed air is delivered to the air intake channel 103 and flows through the outer cavity of the nozzle 2, the airflow is divided into two paths, which enter the dispersing air guide hole 201 and the atomizing air guide hole 202 respectively and are ejected at high speed. The airflow ejected from the dispersing air guide hole 201 can disrupt the flow direction of the sludge in the inner cavity 203 of the nozzle, while the airflow ejected from the atomizing air guide hole 202 can cause the disturbed sludge to rotate at high speed. This high-speed rotation can significantly promote the mixing of sludge and air, and under the action of centrifugal force, the sludge is uniformly atomized when it is ejected from the nozzle 2.

[0047] In some embodiments, the dispersing air guide hole 201 is disposed between the atomizing air guide hole 202 and the inner tube 102. This arrangement forms a progressive mechanism of first dispersing and then atomizing. The dispersing air guide hole 201 is close to the inner tube 102 so that the compressed air ejected from it can disrupt the initial sludge flow at the first time to avoid agglomeration. The compressed air ejected from the atomizing air guide hole 202 treats the disrupted sludge to achieve uniform atomization.

[0048] In some embodiments, the number of dispersing air guide holes 201 is three, and they are evenly distributed along the circumference of the nozzle 2. The angle between the dispersing air guide holes 201 and the center line of the outer tube 101 is 30°-60°. For example, the angle between the dispersing air guide holes 201 and the center line of the outer tube 101 can be 45°.

[0049] Compressed air ejected from three evenly distributed dispersing air guide holes 201 can form a circumferentially symmetrical airflow impact, avoiding local accumulation of sludge in the nozzle inner cavity 203 and ensuring that the dispersing effect has no dead corners. The tilt angle of 30°-60° (specifically 45°) allows the compressed air to act on the water-containing sludge with oblique impact force, which not only enhances the ability to tear and disperse sludge clumps, but also guides the sludge to gather towards the center of the nozzle 2, creating a uniform material base for the subsequent atomization step. This can effectively solve the problems of incomplete dispersing and uneven sludge distribution caused by traditional single-direction airflow.

[0050] In some embodiments, the number of atomizing gas guide holes 202 is 6, and they are evenly distributed along the circumference of the nozzle 2; the angle between the atomizing gas guide holes 202 and the center line of the outer tube 101 is 0°-180°. For example, the angle between the atomizing gas guide holes 202 and the center line of the outer tube 101 can be 90°.

[0051] Compressed air ejected from six evenly distributed atomizing gas guide holes 202 can form a surrounding airflow field. Through the synergistic effect of multiple airflows, the rotational driving force is enhanced. The 0°-180° angle range (specifically 90°) allows the compressed air to cut into the sludge flow tangentially, maximizing the conversion into rotational kinetic energy. This drives the sludge to form a high-speed rotating vortex, which not only accelerates the mixing of sludge and air, but also makes the atomized particles more uniform in size and wider in distribution range through centrifugal force. This avoids local temperature fluctuations in the furnace caused by uneven atomization and further improves combustion stability.

[0052] By delivering compressed air into the air intake channel 104 and then spraying it out from the dispersing air guide hole 201 and the atomizing air guide hole 202, the dual effect of first dispersing and then rotating the water-containing sludge is achieved. This ensures that the sludge containing a certain amount of moisture is uniformly atomized when sprayed from the nozzle 2. The uniformly atomized sludge particles can fully contact the high-temperature flue gas in the furnace, avoiding the situation where sludge clumps absorb local heat in the traditional direct combustion process. This effectively maintains a stable temperature distribution in the furnace and prevents abnormal temperature fluctuations. A stable furnace temperature ensures a continuous and stable combustion condition in the boiler, improving combustion efficiency and heat recovery. It also avoids coking and corrosion problems on the boiler heating surfaces caused by temperature fluctuations, fundamentally reducing the risk of equipment failure and maintenance costs, and ultimately meeting the core requirements of industrial stable production for sludge treatment processes.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency and energy-saving sludge atomizing spray gun, characterized in that, include: Sludge pipe (1) and nozzle (2); The sludge pipe (1) includes an outer pipe (101) and an inner pipe (102); At least a portion of the inner tube (102) is disposed inside the outer tube (101), an air intake channel (103) is formed between the inner tube (102) and the outer tube (101), and an air inlet (1021) is provided on the outer tube (101); The nozzle (2) is disposed at one end of the outer tube (101), and the nozzle (2) is provided with a nozzle inner cavity (203), which is connected to the inner tube (102); The nozzle (2) is provided with at least one dispersing air guide hole (201), and the dispersing air guide hole (201) is connected to the air inlet channel (103) and the nozzle inner cavity (203); The nozzle (2) is provided with at least one atomizing gas guide hole (202), which is connected to the air inlet channel (103) and the nozzle inner cavity (203).

2. The high-efficiency and energy-saving sludge atomizing spray gun according to claim 1, characterized in that, The inner tube (102) extends to the outside of the outer tube (101) at one end away from the nozzle (2), and a sludge inlet (104) is provided at the end.

3. The high-efficiency and energy-saving sludge atomizing spray gun according to claim 2, characterized in that, A connecting flange (4) is provided at one end of the inner tube (102) extending to the outside of the outer tube (101).

4. The high-efficiency and energy-saving sludge atomizing spray gun according to claim 1, characterized in that, The number of the dispersing air guide holes (201) is 3, and they are evenly distributed along the circumference of the nozzle (2).

5. A high-efficiency and energy-saving sludge atomizing spray gun according to claim 1 or 4, characterized in that, The angle between the dispersing air guide hole (201) and the center line of the outer tube (101) is 30°-60°.

6. The high-efficiency and energy-saving sludge atomizing spray gun according to claim 1, characterized in that, The number of atomizing gas guide holes (202) is 6, and they are evenly distributed along the circumference of the nozzle (2).

7. A high-efficiency and energy-saving sludge atomizing spray gun according to claim 1 or 6, characterized in that, The angle between the atomizing gas guide hole (202) and the center line of the outer tube (101) is 0°-180°.

8. The high-efficiency and energy-saving sludge atomizing spray gun according to claim 1, characterized in that, The dispersing gas guide hole (201) is disposed between the atomizing gas guide hole (202) and the inner tube (102).

9. The high-efficiency and energy-saving sludge atomizing spray gun according to claim 1, characterized in that, The pressure of the compressed air entering the intake passage (103) is 0.2-0.6 MPa.

10. The high-efficiency and energy-saving sludge atomizing spray gun according to claim 1, characterized in that, An air inlet pipe (3) is provided on the outer pipe (101) at the position corresponding to the air inlet (1021).

Images