Comprehensive spray gun of household garbage incinerator

Abstract

The utility model provides a household garbage incinerator comprehensive spray gun which comprises an outer shell, an inner shell, a nozzle, an inner atomizing spray pipe and a telescopic adjusting mechanism, the inner shell is coaxially arranged in the outer shell in a sleeved mode, and the outer shell is connected with the inner shell to form a first annular space; the inner atomizing spray pipe is located in the middle of the inner shell, and a second annular space is formed between the inner shell and the inner atomizing spray pipe; the front end of the inner atomizing spray pipe is connected with the nozzle, the tail end is a steam inlet, and a high-pressure air inlet is formed close to the tail end; a sludge feeding pipe and a blow-off pipe are arranged at the tail end of the inner shell; the shell is provided with an outer atomized air inlet; the inner shell is connected with an outer atomization rotational flow air inlet pipe; the front end of the outer shell is connected with the front end of the inner shell through an annular sealing plate, and a rotational flow hole is formed in the annular sealing plate; and the inner shell is connected with the inner atomizing spray pipe through a telescopic adjusting mechanism. According to the technical scheme, coking of the hearth can be reduced, and long-period stable operation of the incinerator is effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of waste treatment equipment, and in particular to a comprehensive spray gun for a municipal solid waste incinerator. Background Technology

[0002] Injecting domestic sewage sludge into the furnace for high-temperature incineration not only eliminates odors, kills pathogens, and completely decomposes organic matter, but also generates heat that can be used for power generation, and the slag can be used for brick making and other building materials, thus realizing resource utilization. This is currently the most effective method for sludge treatment.

[0003] Currently, there are two methods for incinerating municipal solid waste sludge: 1. The sludge is first dehydrated and dried, then crushed into appropriate particle sizes before being incinerated in different furnaces or kilns. This process is complex, energy-intensive, and involves high equipment investment costs. Furthermore, the moisture content of the dried sludge is unstable, resulting in less than ideal combustion. 2. The sludge does not require drying (moisture content approximately 80%-85%) and is directly transported to a sludge storage tank. It is then pumped by a high-pressure pump to atomize in a spray gun and sprayed into the furnace for high-temperature incineration. The atomized sludge is evenly dispersed, resulting in complete combustion. The equipment process is simple, and investment and operating costs are lower. However, this method suffers from excessively high furnace temperatures, leading to coking in the furnace, requiring frequent cleaning, resulting in a short normal operating cycle and poor stability of the incinerator. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model discloses a comprehensive spray gun for a municipal solid waste incinerator, which can reduce excessively high furnace temperatures, decrease furnace coking, and effectively ensure the long-term stable operation of the incinerator.

[0005] The technical solution of this utility model is as follows:

[0006] A comprehensive spray nozzle for a municipal solid waste incinerator includes an outer shell, an inner shell, a nozzle, an inner atomizing spray pipe, and a telescopic adjustment mechanism. The inner shell is coaxially fitted inside the outer shell, and the outer shell and the inner shell are connected to form a first annular space. The inner atomizing spray pipe is located in the middle of the inner shell, and a second annular space is formed between the inner shell and the inner atomizing spray pipe. The front end of the inner atomizing spray pipe is connected to the nozzle, and the rear end is a steam inlet, with a high-pressure air inlet located near the rear end. The rear end of the inner shell is provided with a sludge feed pipe and a sewage discharge pipe.

[0007] The outer shell is provided with an external atomized air inlet for entering the first annular space; the inner shell is connected to an external atomized swirling air inlet pipe for introducing external atomized swirling air into the second annular space;

[0008] The front end of the outer shell is connected to the front end of the inner shell through an annular sealing plate. The annular sealing plate is provided with swirling holes that atomize the sprayed sludge into a swirling flow.

[0009] The tail end of the inner shell is sealed to the inner atomizing nozzle, and the inner shell is connected to the inner atomizing nozzle through a telescopic adjustment mechanism.

[0010] This technical solution allows for the adjustment of the nozzle position via a telescopic adjustment mechanism, maximizing sludge atomization. Sludge enters the second annular space through the sludge feed pipe, mixing thoroughly with air. Air enters the second annular channel through the external atomizing swirl air inlet pipe, generating swirling air that mixes with the semi-solid sludge to form a swirling stream that is then sprayed into the furnace. Steam, sourced from the boiler drum's saturated steam, is introduced through the steam inlet. When coking in the furnace is severe, sludge back-spraying can be stopped, the nozzle position adjusted, and the steam valve opened for steam decoking. Air enters the first annular space through the external atomizing air inlet, further atomizing the sprayed sludge through swirling holes on the annular sealing plate, ensuring complete combustion. When the furnace is shut down or sludge back-spraying is stopped, the drain valve is opened to discharge the wastewater from the spray gun into the sludge storage tank.

[0011] As a further improvement of this utility model, the tail end of the internal atomizing nozzle is provided with an internal atomizing high-pressure air inlet. The high-pressure air enters the internal atomizing nozzle through this internal atomizing high-pressure air inlet, and then passes through the nozzle to enhance the atomization of the sludge at the outlet, so as to make the sludge atomization effect better and the combustion more complete.

[0012] As a further improvement of this utility model, the tail end of the inner shell is sealed to the inner atomizing nozzle through a sealing component to prevent sludge from flowing out of the second annular channel.

[0013] As a further improvement of this utility model, the telescopic adjustment mechanism includes an adjusting screw, the front end of which is welded and fixed to a sealing member, and the rear end of which is connected to an adjusting plate connected to the inner atomizing nozzle. Further, there are four adjusting screws, symmetrically distributed. More preferably, the adjusting plate is welded to the inner atomizing nozzle, and the rear end of the adjusting screw passes through the adjusting plate and is locked with a nut.

[0014] As a further improvement of this utility model, the sealing component adopts a packing seal.

[0015] As a further improvement of this utility model, the annular sealing plate is installed at an angle of 15-45 degrees to the axis of the inner shell.

[0016] As a further improvement of this utility model, the opening direction of the swirling hole forms an angle of 30-60 degrees with the plane of the annular sealing plate. More preferably, the diameter of the swirling hole is 3-8mm.

[0017] As a further improvement of this utility model, the inner shell is provided with an outer atomizing swirl hole, the opening direction of which forms an angle of 30-60 degrees with the axis of the inner shell. The outer atomizing swirl hole is used to introduce air into the second annular channel to generate swirling air, which is then fully mixed with the semi-solid sludge to form a swirl.

[0018] As a further improvement of this utility model, the inner atomizing nozzle is movably connected to the inner shell via a positioning ring to maintain its central positioning. Furthermore, the positioning ring is welded to the inner wall of the spray gun's inner shell. Using this technical solution, the inner atomizing nozzle is positioned at the center of the spray gun via the positioning ring, preventing the nozzle from swinging left or right. The positioning ring is welded and fixed to the inner shell of the spray gun, allowing the nozzle to move back and forth within the positioning ring.

[0019] As a further improvement of this utility model, the angle between the axis of the sludge feed pipe and the axis of the inner shell is 30-60 degrees. Further, the angle between the axis of the sludge feed pipe and the axis of the inner shell is 45 degrees.

[0020] As a further improvement of this utility model, the sludge feed pipe is provided with a cleaning port for cleaning the sludge inside the spray gun with clean water. This cleaning port can be connected to a cleaning pipe. When the furnace is shut down or the sludge back spraying is stopped, the valve of the cleaning pipe can be opened to clean the sludge inside the spray gun with clean water, preventing the inner wall of the spray gun from becoming caked and the nozzle from becoming clogged.

[0021] As a further improvement of this utility model, a spiral guide vane is provided in the air intake channel of the external atomizing air inlet.

[0022] As a further improvement of this utility model, the internal atomizing nozzle is rigidly connected to the nozzle via a nozzle connector.

[0023] As a further improvement of this utility model, the nozzle is conical. The conical design of the nozzle results in a large scattering angle and good atomization effect.

[0024] As a further improvement of this utility model, the outer shell is connected to the fixed support. Furthermore, the fixed support includes an adjustable-angle flange connection component. Further, the flange surface of the flange connection component is provided with 3-8 arc-shaped or oblong holes. Using this technical solution, the spray gun can be horizontally mounted on the furnace wall via the fixed support. Furthermore, the spray gun is fixed to the support flange with screws, making disassembly convenient.

[0025] As a further improvement of this utility model, the outer tube is provided with inlets for leachate and filtered kitchen waste. When leachate or filtered kitchen waste needs to be treated, the leachate or kitchen waste can be mixed into the sludge. Under the action of swirling air, the mixture is fully mixed in the second annular space and then sprayed into the furnace for incineration.

[0026] As a further improvement of this utility model, the sludge feed pipe and the sewage discharge pipe are arranged opposite to each other on the side wall of the inner shell.

[0027] As a further improvement of this utility model, the main parts such as the inner shell, outer shell, nozzle, and inner atomizing nozzle are made of high temperature resistant, wear resistant and corrosion resistant materials to meet the requirements of various types of incinerator operating conditions.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0029] First, the spray gun using the technical solution of this utility model utilizes the high-temperature environment inside the incinerator furnace to atomize and directly spray filtered semi-solid municipal sludge (with a water content of approximately 80%), kitchen waste, and leachate into the incinerator for high-temperature incineration. This achieves the goals of safe, environmentally friendly, waste reduction, and resource recovery. Simultaneously, it reduces excessively high furnace temperatures and coking within the furnace, effectively protecting the incinerator for long-term stable operation. Compared to sludge landfilling and sludge drying followed by incineration, this method saves on investment and operating costs, significantly improving the economic benefits for enterprises.

[0030] Secondly, the spray gun structure of this utility model is simple, easy to process, install, and disassemble; it is also easy to operate. The sludge injection rate, the amount of air required for internal and external atomization will automatically adjust to suitable parameters according to changes in the incinerator's operating conditions, ensuring the normal operation of the incinerator. Furthermore, after a period of continuous trial operation, the spray gun has demonstrated good atomization effect, low energy consumption, and minimal impact on temperature fluctuations in the incinerator furnace, fully meeting the usage requirements of various types of incinerators. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a comprehensive spray gun for a municipal solid waste incinerator according to an embodiment of this utility model.

[0032] Figure 2 yes Figure 1 View A in the diagram.

[0033] The reference numerals in the figures include:

[0034] 1-Outer shell, 2-Inner shell, 3-Nozzle, 4-Nozzle connector, 5-Annular sealing plate, 6-Fixed support, 7-Positioning ring, 8-Flange connection component, 9-Outer atomizing swirl air inlet pipe, 10-Cleaning port, 11-Sludge inlet pipe, 12-Adjusting screw, 13-Inner atomizing nozzle, 14-Steam inlet, 15-Leachate and filtered kitchen waste inlet, 16-Inner atomizing high-pressure air inlet, 17-Sealing component, 18-Drain pipe, 19-Outer atomizing air inlet, 20-Adjusting plate. Detailed Implementation

[0035] The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0036] like Figure 1 and Figure 2 As shown, a comprehensive spray nozzle for a municipal solid waste incinerator includes an outer shell 1, an inner shell 2, a nozzle 3, an inner atomizing spray pipe 13, and a telescopic adjustment mechanism. The inner shell 2 is coaxially fitted inside the outer shell 1, and the outer shell 1 and the inner shell 2 are connected to form a first annular space. The inner atomizing spray pipe 13 is located in the middle of the inner shell 2, and a second annular space is formed between the inner shell 2 and the inner atomizing spray pipe 13. The front end of the inner atomizing spray pipe 13 is connected to the nozzle 3, and the rear end is a steam inlet 14, with a high-pressure air inlet near the rear end. The rear end of the inner shell 2 is provided with a sludge feed pipe 11 and a sewage discharge pipe 18 arranged opposite to each other. The outer shell 1 is provided with an external atomizing air inlet 19 for entering the first annular space; the inner shell 2 is connected to an external atomizing swirling air inlet pipe 9 for introducing external atomizing swirling air into the second annular space; the front end of the outer shell 1 is connected to the front end of the inner shell 2 through an annular sealing plate 5, and the annular sealing plate 5 is provided with swirling holes for forming swirling external atomization of the sprayed sludge; the opening direction of the swirling holes is inclined, forming an angle of 30-60 degrees with the plane of the annular sealing plate 5; the tail end of the inner shell 2 is sealed to the inner atomizing nozzle 13 through a sealing member 17, and the inner shell 2 is connected to the inner atomizing nozzle 13 through a telescopic adjustment mechanism.

[0037] Specifically, the inner atomizing nozzle 13 is movably connected to the inner shell 2 via a positioning ring 7. The positioning ring 7 is welded to the inner wall of the inner shell 2 of the spray gun to maintain the center positioning of the inner atomizing nozzle 13, and the inner atomizing nozzle 13 can be disassembled independently. The telescopic adjustment mechanism includes four symmetrically arranged adjusting screws 12. The front end of the adjusting screw 12 is welded and fixed to the sealing member 17, and the rear end of the adjusting screw 12 passes through the adjusting plate 20 connected to the inner atomizing nozzle 13 and is locked at both ends by nuts, so that the nozzle is fixed. When the nuts are loosened, the adjusting plate 20 can drive the inner atomizing nozzle 13 to move back and forth. The inner atomizing nozzle 13 and the nozzle 3 are connected by a threaded rigid connection, thereby adjusting the nozzle 3 to the optimal position.

[0038] The sealing component 17 uses a packing seal to prevent sludge from flowing out of the second annular channel.

[0039] The annular sealing plate 5 is installed at an angle of 15-45 degrees to the axis of the inner shell 2; the tail end of the inner atomizing nozzle 13 is provided with an inner atomizing high-pressure air inlet 16.

[0040] The inner shell 2 is provided with an external atomizing swirling hole for introducing air into the second annular channel to generate swirling air and fully mix with semi-solid sludge to form a swirling flow. The opening direction of the external atomizing swirling hole forms an angle of 30-60 degrees with the axis of the inner shell 2.

[0041] The angle between the axis of the sludge feed pipe 11 and the axis of the inner shell 2 is 30-60 degrees. The sludge feed pipe 11 is provided with a cleaning port 10 for cleaning the sludge inside the spray gun with clean water.

[0042] The internal atomizing nozzle 13 is rigidly connected to the nozzle 3 via the nozzle connector 4; the nozzle 3 is conical.

[0043] The outer casing 1 is connected to the fixed support 6, and the fixed support 6 includes an adjustable flange connection component 8. The flange surface of the flange connection component 8 has 3-8 arc-shaped holes. Using this technical solution, the spray gun can be horizontally mounted on the furnace wall via the fixed support 6. Furthermore, the spray gun is fixed to the support flange with screws, making disassembly convenient.

[0044] The outer pipe is equipped with leachate and filtered kitchen waste inlets 15. When leachate or filtered kitchen waste needs to be treated, the leachate or kitchen waste can be mixed into the sludge. Under the action of swirling air, the mixture is fully mixed in the second annular space and then sprayed into the furnace for incineration.

[0045] In this embodiment, the main components such as the inner shell 2, outer shell 1, nozzle 3, and inner atomizing nozzle 13 are made of high-temperature resistant, wear-resistant, and corrosion-resistant materials to meet the requirements of various types of incinerator operating conditions.

[0046] In this technical solution, sludge enters the second annular space between the inner shell 2 and the inner atomizing nozzle 13 through the sludge feed pipe 11, where it is fully mixed with air. Air enters the second annular channel through the outer atomizing swirl air inlet pipe 9 and the outer atomizing swirl hole of the inner shell 2, generating swirling air that mixes thoroughly with the semi-solid sludge to form a swirling stream that is then sprayed into the furnace through the second annular channel. Air enters the first annular space through the outer atomizing air inlet 19, and then further atomizes the sprayed sludge through the inclined swirl hole on the annular sealing plate 5, ensuring complete combustion of the sludge.

[0047] Steam enters the inner atomizing nozzle 13 through steam inlet 14. The steam comes from the saturated steam in the boiler drum. When coking in the furnace is severe, sludge back spraying can be stopped, the position of nozzle 3 adjusted, and the steam valve opened for steam decoking. High-pressure air enters the inner atomizing nozzle 13 through the inner atomizing high-pressure air inlet 16, and then passes through nozzle 3 to enhance the atomization of the sludge at the outlet, resulting in better sludge atomization and more complete combustion.

[0048] When treating leachate or filtered kitchen waste, the leachate or kitchen waste can be mixed into the sludge through the leachate and filtered kitchen waste inlet 15. Under the action of swirling air, the mixture is fully mixed in the second annular space and then sprayed into the furnace for incineration.

[0049] The technical solution of this embodiment has the functions of sludge re-injection, kitchen waste re-injection, and steam decoking. During the process, the internal atomizing nozzle 3 can be moved to a suitable position by adjusting the lead screw 12 to achieve the maximum atomization effect of the sludge.

[0050] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0053] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the shape and structure of this utility model are within the protection scope of this utility model.

Claims

1. A comprehensive spray gun for a household waste incinerator, characterized by: It comprises a shell, an inner shell, a nozzle, an inner atomizing nozzle and a telescopic adjusting mechanism, the inner shell is coaxially sleeved in the shell, the shell and the inner shell are connected to form a first annular space; The inner atomizing nozzle is located in the middle of the inner shell, a second annular space is formed between the inner shell and the inner atomizing nozzle, the front end of the inner atomizing nozzle is connected with the nozzle, the tail end is a steam inlet, and a high-pressure air inlet is arranged close to the tail end; the tail end of the inner shell is provided with a sludge feeding pipe and a sludge discharge pipe; The shell is provided with an outer atomizing air inlet opening into the first annular space; the inner shell is connected with an outer atomizing rotational flow air inlet pipe for introducing rotational flow air into the second annular space; The front end of the shell is connected with the front end of the inner shell through an annular sealing plate, and the annular sealing plate is provided with rotational flow holes for forming rotational flow outer atomization of the sprayed sludge; The tail end of the inner shell is sealingly connected with the inner atomizing nozzle, and the inner shell is connected with the inner atomizing nozzle through the telescopic adjusting mechanism.

2. The comprehensive lance for household waste incinerator according to claim 1, characterized in that: The tail end of the inner shell is sealingly connected with the inner atomizing nozzle through a sealing member.

3. The comprehensive lance for household waste incinerator according to claim 2, characterized in that: The telescopic adjusting mechanism comprises an adjusting screw rod, the front end of the adjusting screw rod is fixed on the sealing member, and the rear end of the adjusting screw rod is connected with an adjusting plate connected on the inner atomizing nozzle.

4. The comprehensive lance for household waste incinerator according to claim 3, characterized in that: The sealing member adopts a packing seal.

5. The comprehensive lance for household waste incinerator according to claim 1, characterized in that: The annular sealing plate is installed at an inclination angle of 15-45 degrees with respect to the axis of the inner shell; the tail end of the inner atomizing nozzle is provided with an inner atomizing high-pressure air inlet.

6. The comprehensive lance for household waste incinerator according to claim 1, characterized in that: The opening direction of the rotational flow hole forms an angle of 30-60 degrees with respect to the plane of the annular sealing plate; The inner shell is provided with an outer atomizing rotational flow hole for introducing air into the second annular channel to generate rotational flow air and fully mix with the semi-solid sludge to form rotational flow, and the opening direction of the outer atomizing rotational flow hole forms an angle of 30-60 degrees with respect to the axis of the inner shell.

7. The comprehensive lance for household waste incinerator according to claim 1, characterized in that: The inner atomizing nozzle is movably connected with the inner shell through a positioning ring to keep central positioning; the positioning ring is welded to the inner wall of the inner shell of the lance.

8. The comprehensive lance for household waste incinerator according to claim 1, characterized in that: The angle between the axis of the sludge feeding pipe and the axis of the inner shell is 30-60 degrees.

9. The comprehensive lance for household waste incinerator according to claim 1, characterized in that: The sludge feeding pipe is provided with a cleaning port for cleaning the sludge in the lance with clean water.

10. The comprehensive lance for household waste incinerator according to any one of claims 1 to 9, characterized in that: The inner atomizing nozzle is rigidly connected with the nozzle through a nozzle connector; the nozzle is conical; The shell is connected with a fixed support, and the fixed support comprises a flange connecting member with adjustable angle. The shell is connected with a fixed support, and the fixed support comprises a flange connecting member with adjustable angle.

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