A sludge direct injection blending combustion system lance
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2026-08-11
AI Technical Summary
[0004]本实用新型的目的在于提供一种污泥直喷掺烧系统喷枪，以解决上述背景技术中提出的污泥直喷掺烧工艺因具有投资与运营成本低、节能环保性好、污泥资源化利用率高等优势而得到广泛应用，污泥雾化喷枪作为污泥直喷掺烧工艺的关键部件，现主要还存在如下不足，一是喷枪内的压缩空气流道设计不合理，不能从多个不同的方向对污泥物料进行吹散，难以达到理想的雾化效果，二是喷枪内空气喷孔的大小、数量、分布、倾斜角度等不合理，与污泥物料的流向、流速和流量等不匹配，难以实现对污泥物料的有效吹散雾化，甚至对污泥的流动形成阻碍，三是气污混合腔及喷射流道设计不合理，要么导致气污混合不均使污泥因粒度大、分布范围小而烧不彻底，要么使污泥直接喷射到喷枪对面的炉堂壁上，达不到直接掺烧的目的的问题
本实用新型采用两路压缩空气同时对污泥进行多点、多角度的吹推作用，并通过对气流喷孔的大小、数量、分布、倾斜角度等的优化，解决了污泥物料吹散雾化效果差、甚至对污泥的流动形成阻碍的问题，另外，通过对喷头座外锥面与喷头套内孔面之间流道横截面大小沿气污混合物流动的整个路径都进行的优化设计，使气污混合均匀性好、气污混合物的喷流特性好，其结构简单、雾化效果好、使用可靠性高、能确保污泥燃烧充分，在本技术领域内具有广泛的实用性。
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Figure CN224614053U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of spray guns for sludge direct injection and co-firing systems, specifically relating to a spray gun for a sludge direct injection and co-firing system. Background Technology
[0002] The sludge direct injection and co-incineration system spray gun is a key piece of equipment applicable to the sludge direct injection and co-incineration process in municipal solid waste power plants. Its core function is to efficiently atomize sludge and spray it into the incinerator to achieve full mixing and combustion with fuel. Through the optimized design of dual airflow and airflow nozzles and air-sludge mixing channels, the spray gun improves the sludge atomization effect. It has the advantages of simple structure, good atomization effect, high reliability, and can ensure complete combustion of sludge. It has wide applicability in the field of sludge direct injection and co-incineration technology.
[0003] The direct injection co-firing process for sludge has been widely used due to its advantages such as low investment and operating costs, good energy conservation and environmental protection, and high sludge resource utilization rate. As a key component of the direct injection co-firing process, the sludge atomizing spray gun still has the following shortcomings: First, the design of the compressed air flow channel inside the spray gun is unreasonable, which makes it impossible to disperse the sludge material from multiple different directions, making it difficult to achieve the ideal atomization effect. Second, the size, number, distribution, and tilt angle of the air nozzles inside the spray gun are unreasonable and do not match the flow direction, flow velocity, and flow rate of the sludge material, making it difficult to achieve effective dispersion and atomization of the sludge material, and even hindering the flow of sludge. Third, the design of the air-sludge mixing chamber and the spray flow channel is unreasonable, which either leads to uneven air-sludge mixing, resulting in incomplete combustion of sludge due to large particle size and small distribution range, or causes the sludge to be sprayed directly onto the furnace wall opposite the spray gun, failing to achieve the purpose of direct co-firing. Utility Model Content
[0004] The purpose of this utility model is to provide a spray gun for a sludge direct injection and co-firing system, in order to solve the problems mentioned in the background art. The sludge direct injection and co-firing process is widely used due to its advantages such as low investment and operating costs, good energy saving and environmental protection, and high sludge resource utilization rate. However, the sludge atomizing spray gun, as a key component of the sludge direct injection and co-firing process, currently suffers from the following main shortcomings: First, the compressed air flow channel design inside the spray gun is unreasonable, failing to disperse the sludge material from multiple different directions, making it difficult to achieve the ideal atomization effect. Second, the size, number, distribution, and tilt angle of the air nozzles inside the spray gun are unreasonable, not matching the flow direction, velocity, and flow rate of the sludge material, making it difficult to effectively disperse and atomize the sludge material, and even hindering the flow of the sludge. Third, the design of the air-sludge mixing chamber and the spray flow channel is unreasonable, either leading to uneven air-sludge mixing, resulting in incomplete combustion of the sludge due to its large particle size and small distribution range, or causing the sludge to be directly sprayed onto the furnace wall opposite the spray gun, failing to achieve the purpose of direct co-firing.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a spray gun for a sludge direct injection and co-firing system, comprising a sludge conveying pipe, an atomizing nozzle at the end hole of the sludge conveying pipe, a sludge inlet connector at the middle left side of the upper end of the sludge conveying pipe, a water inlet connector at the upper end of the sludge conveying pipe, an air inlet connector at the lower end of the sludge conveying pipe, the air inlet connector leading to a side air pipe located inside the sludge conveying pipe, a central air pipe inside the flange at the end of the sludge conveying pipe, one end of the central air pipe being connected to the air nozzle via a threaded structure, a nozzle sleeve at the right end of the sludge conveying pipe, a nozzle seat at the inner hole of the nozzle sleeve, multiple evenly distributed guide plates at the connection between the nozzle seat and the nozzle sleeve, an inner ring sleeve fixed at the inner wall of the central air pipe, and a corrugated ring at the inner wall of the inner ring sleeve.
[0006] Preferably, the multiple rows of small through holes uniformly machined on the air nozzle are three or four rows, and each row includes nine to sixteen small through holes evenly distributed in a ring. The small through holes on the cylindrical body are all machined radially, and the small through holes on the hemisphere are all machined at an angle of 30 to 50 degrees inclined to the axis.
[0007] Preferably, the large end face of the nozzle sleeve is inclined at an angle of 10 to 20 degrees relative to the small end face, and the inner hole of the nozzle sleeve includes multiple circular holes and conical holes, and multiple annular grooves are machined on the outer surface.
[0008] Preferably, the nozzle holder is inclined in the inner hole of the nozzle sleeve, and its inclination angle is the same as the inclination angle of the large end face of the nozzle sleeve relative to the small end face, so that the large end face of the nozzle holder and the large end face of the nozzle sleeve are on the same upper plane.
[0009] Preferably, the inner hole of the nozzle sleeve includes multiple circular holes and conical holes, specifically two circular holes and two conical holes. The hole near the small end is a circular hole, and the axis of this circular hole is perpendicular to the small end face. The other three holes are coaxial, and the axis is perpendicular to the large end face.
[0010] Preferably, the multiple annular grooves machined on the outer surface of the nozzle sleeve are two, wherein the smaller groove at the end is connected to the side air pipe, and multiple small notches for interconnection are opened on the common groove wall of the two annular grooves.
[0011] Preferably, the annular groove machined on the outer surface of the nozzle sleeve has two rows of small through holes evenly distributed in a ring on the bottom surface of the groove, with the same number of small through holes in each row, and each row having ten to fourteen holes.
[0012] Preferably, the number of evenly distributed guide plates that are fixedly connected together with the nozzle holder and the nozzle sleeve is three to five.
[0013] Compared with the prior art, this utility model provides a spray gun for a sludge direct injection and co-firing system, which has the following beneficial effects: This invention employs two compressed air streams to simultaneously blow and push sludge at multiple points and angles. By optimizing the size, number, distribution, and tilt angle of the airflow nozzles, it solves the problems of poor atomization and dispersion of sludge material, and even obstruction of sludge flow. Furthermore, by optimizing the cross-sectional size of the flow channel between the outer conical surface of the nozzle seat and the inner hole surface of the nozzle sleeve along the entire flow path of the air-sludge mixture, it achieves good uniformity of air-sludge mixing and good jet characteristics of the air-sludge mixture. Its structure is simple, its atomization effect is good, its reliability is high, and it can ensure complete combustion of sludge, making it widely applicable in this technical field.
[0014] This device has an inner ring sleeve installed on the inner wall of the central air pipe, and a corrugated ring installed on the inner wall of the inner ring sleeve. This causes the compressed air to form a vortex. The corrugated ring structure can reduce the adhesion and accumulation of sludge particles on the inner wall of the air nozzle by means of airflow vibration, thereby reducing the risk of blockage, extending the stable operation time of the equipment, and reducing the frequency of operation and maintenance. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the spray gun structure of a sludge direct injection and co-firing system according to the present invention.
[0016] Figure 2 This is a schematic diagram of the internal structure of the sludge conveying pipe of the spray gun in a sludge direct injection and co-firing system according to this utility model.
[0017] Figure 3 This is a schematic diagram of the bottom structure of the sludge conveying pipe of the spray gun in a sludge direct injection and co-firing system according to this utility model.
[0018] Figure 4 This is a front view schematic diagram of the spray gun structure of a sludge direct injection and co-firing system according to the present invention.
[0019] In the diagram: 1. Nozzle sleeve; 2. Nozzle seat; 3. Sludge conveying pipe; 4. Central air pipe; 5. Sludge inlet connector; 6. Water inlet pipe connector; 7. Air inlet connector; 8. Side air pipe; 9. Air nozzle; 10. Guide plate; 11. Inner ring sleeve; 12. Corrugated ring. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The utility model provides, for example Figure 1-4 The sludge direct injection co-firing system spray gun shown includes a sludge conveying pipe 3, an atomizing nozzle at the end hole of the sludge conveying pipe 3, a sludge inlet connector 5 at the middle left side of the upper end of the sludge conveying pipe 3, a water inlet connector 6 at the upper end of the sludge conveying pipe 3, an air inlet connector 7 at the lower end of the sludge conveying pipe 3, the air inlet connector 7 leading to a side air pipe 8 located inside the sludge conveying pipe 3, a central air pipe 4 inside the flange at the end of the sludge conveying pipe 3, one end of the central air pipe 4 being connected to an air nozzle 9 via a threaded structure, a nozzle sleeve 1 at the right end of the sludge conveying pipe 3, a nozzle seat 2 at the inner hole of the nozzle sleeve 1, multiple evenly distributed guide plates 10 at the connection between the nozzle seat 2 and the nozzle sleeve 1, an inner ring sleeve 11 fixed at the inner wall of the central air pipe 4, and a corrugated ring 12 at the inner wall of the inner ring sleeve 11.
[0023] The sludge plunger pump pressurizes the sludge into the sludge delivery pipe 3, which then enters the space between the air nozzle 9, nozzle sleeve 1, and nozzle seat 2. Compressed air in the central air pipe 4 is ejected through the through hole of the air nozzle 9, atomizing the sludge. The atomized sludge is then ejected through the annular channel between the nozzle sleeve 1 and the nozzle seat 2. Simultaneously, compressed air in the side air pipe 8 is ejected through the through hole of the annular groove of the nozzle sleeve 1, atomizing the sludge again. In addition, when work is suspended, water can be introduced through the water inlet pipe connector 6 to clean the interior. The compressed air in the side air pipe 8 can also cool the nozzle sleeve 1 and nozzle seat 2.
[0024] like Figure 2 As shown, the air nozzle 9 has three or four rows of uniformly machined small through holes, with each row including nine to sixteen small through holes evenly distributed in a ring. The small through holes on the cylindrical body are machined radially, while those on the hemispherical body are machined at an angle of 30 to 50 degrees to the axis. The large end face of the nozzle sleeve 1 is inclined at an angle of 10 to 20 degrees relative to the small end face. The inner hole of the nozzle sleeve 1 includes multiple circular holes and conical holes, and multiple annular grooves are machined on its outer surface. The nozzle seat 2 is inclined within the inner hole of the nozzle sleeve 1, with its inclination angle being the same as the inclination angle of the large end face of the nozzle sleeve 1 relative to the small end face. Furthermore, the large end face of the nozzle seat 2 and the large end face of the nozzle sleeve 1 are on the same upper plane. The inner hole of the nozzle sleeve 1 includes multiple circular holes and two conical holes. The hole near the small end is a circular hole, and the axis of the circular hole is perpendicular to the small end face. The other three holes are coaxial, and the axis is perpendicular to the large end face. There are two annular grooves machined on the outer surface of the nozzle sleeve 1. The small groove near the end is connected to the side air pipe 8. There are multiple small notches for mutual communication on the common groove wall of the two annular grooves. There are two rows of small through holes evenly distributed in a ring on the bottom surface of the annular grooves machined on the outer surface of the nozzle sleeve 1. The number of small through holes in each row is the same, and each row has ten to fourteen holes. There are three to five evenly distributed guide plates 10 that are fixedly connected to the nozzle seat 2 and the nozzle sleeve 1.
[0025] Two compressed air streams are used to simultaneously blow and push the sludge at multiple points and angles. By optimizing the size, number, distribution, and tilt angle of the airflow nozzles, the problems of poor sludge atomization and even obstruction of sludge flow are solved. In addition, the cross-sectional size of the flow channel between the outer conical surface of the nozzle seat 2 and the inner hole surface of the nozzle sleeve 1 is optimized along the entire flow path of the air-sludge mixture.
[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A spray gun for a sludge direct injection and co-firing system, characterized in that, The system includes a sludge conveying pipe (3), with an atomizing nozzle at the end hole of the sludge conveying pipe (3), a sludge inlet connector (5) at the middle left side of the upper end of the sludge conveying pipe (3), a water inlet connector (6) at the upper end of the sludge conveying pipe (3), and an air inlet connector (7) at the lower end of the sludge conveying pipe (3). The air inlet connector (7) leads to a side air pipe (8) located inside the sludge conveying pipe (3). The system also includes a sludge conveying pipe (3) with a water inlet connector (6) at the upper end of the sludge conveying pipe (3). The interior of the pipe is provided with a central air pipe (4), one end of which is connected to the air nozzle (9) via a threaded structure. A nozzle sleeve (1) is provided at the right end of the sludge conveying pipe (3). A nozzle seat (2) is provided at the inner hole of the nozzle sleeve (1). Multiple evenly distributed guide plates (10) are provided at the connection between the nozzle seat (2) and the nozzle sleeve (1). An inner ring sleeve (11) is fixed at the inner wall of the central air pipe (4), and a corrugated ring (12) is provided at the inner wall of the inner ring sleeve (11).
2. The spray gun for a sludge direct injection and co-firing system according to claim 1, characterized in that: The air nozzle (9) is uniformly machined with three or four rows of small through holes, and each row includes nine to sixteen small through holes that are evenly distributed in a ring. The small through holes on the cylindrical body are all machined radially, and the small through holes on the hemisphere are all machined at an angle of 30 to 50 degrees inclined to the axis.
3. The spray gun for a sludge direct injection and co-firing system according to claim 1, characterized in that: The large end face of the nozzle sleeve (1) is inclined at an angle of 10 to 20 degrees relative to the small end face. The inner hole of the nozzle sleeve (1) includes multiple circular holes and conical holes, and multiple annular grooves are machined on the outer surface.
4. The spray gun for a sludge direct injection and co-firing system according to claim 3, characterized in that: The nozzle seat (2) is inclined in the inner hole of the nozzle sleeve (1), and its inclination angle is the same as the inclination angle of the large end face of the nozzle sleeve (1) relative to the small end face, and the large end face of the nozzle seat (2) and the large end face of the nozzle sleeve (1) are on the same upper plane.
5. The spray gun for a sludge direct injection and co-firing system according to claim 1, characterized in that: The inner hole of the nozzle sleeve (1) includes multiple circular holes and conical holes, consisting of two circular holes and two conical holes. The hole near the small end is a circular hole, and the axis of the circular hole is perpendicular to the small end face. The other three holes are coaxial, and the axis is perpendicular to the large end face.
6. The spray gun for a sludge direct injection and co-firing system according to claim 1, characterized in that: The nozzle sleeve (1) has two annular grooves machined on its outer surface. The small groove at the end is connected to the side air pipe (8). The common groove wall of the two annular grooves has multiple small notches for mutual communication.
7. The spray gun for a sludge direct injection and co-firing system according to claim 6, characterized in that: The annular groove processed on the outer surface of the nozzle sleeve (1) has two rows of small through holes evenly distributed in a ring on the bottom surface of the groove. The number of small through holes in each row is the same, and each row has ten to fourteen holes.
8. The spray gun for a sludge direct injection and co-firing system according to claim 1, characterized in that: The nozzle holder (2) is fixedly connected to the nozzle sleeve (1) and there are three to five evenly distributed guide plates (10).