Concentrated solution back-spraying spray gun for reducing nitrogen of garbage incinerator

Abstract

The invention relates to the technical field of garbage incineration treatment equipment, and provides a concentrated solution back-spraying spray gun for reducing nitrogen of a garbage incinerator, which comprises a gun body provided with a concentrated solution inlet pipe and a compressed gas inlet pipe which are sleeved inside and outside; the nozzle is movably arranged at the outlet end of the liquid inlet pipe and is used for spraying a concentrated solution; the atomizer is movably arranged at the outlet end of the air inlet pipe, located on the periphery of the nozzle and used for atomizing the concentrated solution to enter the garbage incinerator to be incinerated; wherein the nozzle can positively rotate around the axis of the gun body under the hydraulic pushing action of the concentrated solution, and the atomizer can reversely rotate around the axis of the gun body under the pneumatic pushing action of the compressed gas. According to the invention, the nozzle and the atomizer rotate positively and negatively, so that the concentrated solution sprayed out by the positive spiral and the compressed gas blown out by the negative spiral collide with each other and cut each other, the atomization effect of the concentrated solution can be improved, and the problems of fire difficulty of garbage, material deviation of the incinerator, non-uniform combustion and the like are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of garbage incineration treatment equipment, and in particular to a concentrated liquid back-spraying spray gun for nitrogen reduction in a garbage incinerator. Background Art

[0002] During the storage, transfer, transportation and stacking of garbage, various metabolites and water are produced due to fermentation, decomposition of organic matter, rainwater washing and other reasons, which will form a highly complex high-concentration organic wastewater - landfill leachate. Many garbage incineration plants are equipped with landfill leachate treatment stations. The treatment of landfill leachate usually adopts the "pretreatment + anaerobic + MBR (membrane bioreactor) + NF / RO (nanofiltration / reverse osmosis)" process, in which the NF / RO process unit is a membrane separation process, which will produce about 20% to 30% of post-membrane concentrate. The concentrate contains a large amount of difficult-to-biodegrade, non-biodegradable organic matter and salt, and has extremely poor biodegradability; especially the RO concentrate, which contains a high concentration of monovalent salt. Therefore, the post-membrane concentrate of landfill leachate (hereinafter referred to as concentrate) is difficult to treat. With the increasingly stringent environmental protection standards and environmental protection inspections in my country, many garbage incineration plants require the implementation of the "zero emission" standard, that is, the concentrated liquids produced must be completely treated and consumed in the garbage incineration plant and not discharged.

[0003] At present, the industry mainly uses a spray gun to spray the concentrated liquid back into the waste incinerator for incineration. In this way, not only can the concentrated liquid generated during the treatment of landfill leachate be completely consumed, achieving "zero discharge" of the concentrated liquid, but also the concentration of nitrogen oxides in the flue gas during the waste incineration process can be reduced from the source to meet the relevant emission standards.

[0004] The key to concentrated liquid back-spraying is to ensure that the concentrated liquid is fully atomized to reduce the impact on the combustion conditions of the incinerator (such as the temperature inside the furnace). However, the existing spray guns are limited by their own structure and have poor atomization effects, often resulting in problems such as difficulty in ignition of garbage, biased materials in the incinerator, and uneven combustion. In addition, the concentrated liquid is easy to accumulate in the nozzle, resulting in a significantly increased risk of internal blockage or failure of the spray gun. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a concentrated liquid back-injection spray gun for nitrogen reduction in a waste incinerator, so as to solve the problems that the existing spray gun has poor atomization effect due to the limitation of its own structure, and often has problems such as difficulty in ignition of garbage, material deviation in the incinerator and uneven combustion. In addition, the concentrated liquid is easy to accumulate in the nozzle, resulting in a significantly increased risk of internal blockage or failure of the spray gun.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A concentrated liquid back-spraying spray gun for nitrogen reduction in a garbage incinerator, comprising:

[0008] The gun body has a liquid inlet pipe for concentrated liquid and an air inlet pipe for compressed gas which are arranged inside and outside;

[0009] a nozzle, movably disposed at the outlet end of the liquid inlet pipe, for spraying the concentrated liquid; and

[0010] An atomizer, movably disposed at the outlet end of the air inlet pipe and located outside the nozzle, for atomizing the concentrated liquid to enter the waste incinerator for incineration;

[0011] Wherein, the nozzle can rotate in the positive direction around the axis of the gun body under the hydraulic driving action of the concentrated liquid, and the atomizer can rotate in the reverse direction around the axis of the gun body under the pneumatic driving action of the compressed gas.

[0012] Optionally, the nozzle comprises a first circular ring, a cylindrical barrel and a hemispherical head which are arranged in sequence;

[0013] The first circular ring is rotatably arranged in an embedded manner at a step recessed inwardly at the outlet end of the liquid inlet pipe, and a plurality of guide plates evenly distributed around the circumference are connected to the side of the first circular ring away from the cylindrical tube, each of the guide plates extends into the interior of the liquid inlet pipe and is provided with a first blade, and the first blade extends radially along the liquid inlet pipe and is inclined toward the outlet end of the liquid inlet pipe;

[0014] A plurality of first spray holes evenly distributed around the circumference are provided at the connection between the cylindrical tube and the hemispherical end cap, and the spraying direction of the first spray holes is perpendicular to the axial direction of the liquid inlet pipe;

[0015] The hemispherical end cap is provided with a plurality of second spray holes evenly distributed around the circumference, and the spraying direction of the second spray holes forms an angle of 45° with the axial direction of the liquid inlet pipe.

[0016] Optionally, the first blade is arranged on the inner side of the guide plate;

[0017] The outer side surface of the guide plate is arc-shaped and extends axially along the liquid inlet pipe to be close to the inner circumferential wall of the liquid inlet pipe, and is used to scrape off the concentrated liquid attached to the inner circumferential wall of the liquid inlet pipe and guide it.

[0018] Optionally, a side of the first ring away from the cylindrical barrel is further connected to a plurality of stirring rods evenly distributed around the circumference;

[0019] The stirring rod extends along the axial direction of the liquid inlet pipe for a certain length and then bends radially inward toward the liquid inlet pipe to form an L-shaped structure;

[0020] The L-shaped stirring rod is located at the rear side of the first blade and is spaced apart from the guide plate.

[0021] Optionally, the outlet end of the liquid inlet pipe is detachably connected with a compression sleeve having the same outer diameter as the liquid inlet pipe;

[0022] The pressing sleeve is provided with a first retaining ring;

[0023] The inner side surface of the first retaining ring is slidably matched with the first circular ring on a side facing the cylindrical barrel;

[0024] The outer circumferential wall of the cylindrical barrel is slidably matched with the inner circumferential wall of the first retaining ring.

[0025] Optionally, the atomizer includes a second ring and an atomizing cover connected to each other;

[0026] The second ring is rotatably arranged in an embedded manner at a step recessed inwardly at the outlet end of the air intake pipe, and a plurality of second blades are arranged inside the second ring evenly distributed around the circumference and with a twisting direction opposite to that of the first blades, and the second blades extend radially along the air intake pipe and are inclined toward the outlet end of the air intake pipe;

[0027] The atomizing hood is located at the periphery of the hemispherical head to cover the first spray hole and the second spray hole, and the area between the atomizing hood and the hemispherical head forms a first atomizing flow channel. The outlet of the first atomizing flow channel is opened in the middle of the atomizing hood and is coaxial with the hemispherical head.

[0028] Optionally, it further comprises an end cap, wherein the end cap is provided with a straight cylinder portion and a conical cylinder portion in sequence;

[0029] The straight tube portion has the same outer diameter as the air inlet pipe, and is detachably connected to the outlet end of the air inlet pipe. A second retaining ring is provided on the inner side of the connection between the straight tube portion and the conical tube portion. The second retaining ring is slidably matched with the second ring on the side facing the atomizing hood to block the atomizer to prevent axial movement when the atomizer rotates in the opposite direction around the axis of the gun body.

[0030] The conical cylinder is located at the periphery of the atomizing hood so that the area between the two forms a second atomizing flow channel, the outlet of the second atomizing flow channel is opened in the middle of the small end of the conical cylinder and is coaxial with the atomizing hood, and the inner diameter of the outlet of the second atomizing flow channel is smaller than the inner diameter of the outlet of the first atomizing flow channel so as to form a confluence area between the two;

[0031] The atomizing hood is fixedly connected to the second circular ring through a plurality of connecting rods evenly distributed around the circumference. A plurality of diverter plates evenly distributed around the circumference and inclined are arranged on the side of the atomizing hood facing the second circular ring. The diverter plates and the connecting rods are arranged at intervals and correspond one-to-one with the second blades for compressing the gas flow.

[0032] Optionally, the atomizing cover is provided with a plurality of first through holes and second through holes evenly distributed around the circumference;

[0033] The first through hole and the second through hole correspond to the first spray hole and the second spray hole respectively, and the apertures of the first two are larger than the apertures of the latter two.

[0034] Optionally, the gun body is fixedly mounted on the furnace body of the waste incinerator through a flange pipe;

[0035] The flange pipe includes a flange plate and a sleeve connected to the middle of the flange plate. After the gun body is inserted into the furnace body, the flange plate is fixedly connected to the furnace body. The sleeve is sleeved on the air inlet pipe and is located between the inlet end and the outlet end of the air inlet pipe.

[0036] Optionally, a pair of slide grooves are provided on the inner circumferential wall of the sleeve, and a pair of guide rails are provided on the outer circumferential wall of the intake pipe along its axial direction, and the guide rails are slidably connected with the slide grooves;

[0037] The sleeve is threadedly connected with screws, which are arranged radially along the sleeve and are used for locking the sleeve and the air inlet pipe.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The nozzle and atomizer are set to rotate forward and backward relative to each other, so that the concentrated liquid sprayed by the positive spiral and the compressed gas blown by the reverse spiral collide and cut each other, which can improve the atomization effect of the concentrated liquid and effectively solve the problems of difficult garbage ignition, biased material in the incinerator and uneven combustion.

[0040] 2. Through the coordinated action of the guide plate and the first blade and the stirring action of the stirring rod, the concentrated liquid attached to the inner wall of the circumference of the liquid inlet pipe can be scraped off and at the same time, it can be stirred to reduce its precipitation in the liquid inlet pipe, thereby effectively preventing the risk of blockage inside the nozzle.

[0041] 3. The first retaining ring is pressed against the first ring to block the axial movement of the nozzle, which can improve the stability of the nozzle rotation, thereby ensuring the atomization effect of the concentrated liquid; at the same time, the outer diameter of the compression sleeve is equal to the outer diameter of the liquid inlet pipe, which can reduce the resistance of the compressed gas flow in the air inlet pipe, thereby ensuring the atomization efficiency (effective utilization rate) of the compressed gas.

[0042] 4. The first atomizing channel between the atomizing hood and the hemispherical head and the confluence area between the first atomizing channel outlet and the second atomizing channel outlet can extend the sufficient contact time between the concentrated liquid and the compressed gas, thereby effectively improving the atomization effect of the concentrated liquid.

[0043] 5. Through the first atomizing channel, the second atomizing channel and the confluence area between the first atomizing channel outlet and the second atomizing channel outlet, the sufficient contact time between the concentrated liquid and the compressed gas can be further extended to obtain three atomizations, thereby further improving the atomization effect of the concentrated liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0046] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0047] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0048] Figure 4 Schematic diagram of the three-dimensional structure of the nozzle Figure 1 ;

[0049] Figure 5 Schematic diagram of the three-dimensional structure of the nozzle Figure 2 ;

[0050] Figure 6 It is a schematic diagram of the three-dimensional structure of the pressing sleeve;

[0051] Figure 7 Schematic diagram of the three-dimensional structure of the atomizer Figure 1 ;

[0052] Figure 8 Schematic diagram of the three-dimensional structure of the atomizer Figure 2 ;

[0053] Fig. 9 is a schematic diagram of the three-dimensional structure of the end cap;

[0054] Fig.10 It is a schematic diagram of the three-dimensional structure of the flange pipe. DETAILED DESCRIPTION

[0055] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0056] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0060] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0061] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0062] See also Figures 1 to 10As shown, the present invention provides a concentrated liquid back-spraying gun for nitrogen reduction in a garbage incinerator, comprising:

[0063] The gun body 100 has a liquid inlet pipe 110 for concentrated liquid and an air inlet pipe 120 for compressed gas arranged inside and outside;

[0064] A nozzle 200 is movably disposed at the outlet end of the liquid inlet pipe 110 and is used to spray the concentrated liquid; and

[0065] The atomizer 300 is movably disposed at the outlet end of the air inlet pipe 120 and located outside the nozzle 200, and is used to atomize the concentrated liquid to enter the waste incinerator for incineration;

[0066] The nozzle 200 can rotate in the positive direction (counterclockwise from the inlet of the liquid inlet pipe 110 to the outlet) around the axis of the gun body 100 under the hydraulic force of the concentrated liquid, and the atomizer 300 can rotate in the reverse direction (clockwise from the inlet of the liquid inlet pipe 110 to the outlet) around the axis of the gun body 100 under the pneumatic force of the compressed gas.

[0067] Specifically, the inlet end of the liquid inlet pipe 110 is coaxial with the outlet end, and the inlet end is used to introduce the concentrated liquid; one end of the air inlet pipe 120 facing the inlet end of the liquid inlet pipe 110 is closed (in the present embodiment, the end is welded to the circumferential outer wall of the liquid inlet pipe 110 through an annular ring seal); the inlet end of the air inlet pipe 120 is perpendicular to the outlet end, and the inlet end is arranged close to the closed end thereof, and the inlet end is used to introduce the compressed gas.

[0068] See also Figure 3 to Figure 5As shown, the nozzle 200 includes a first circular ring 210, a cylindrical barrel 220 and a hemispherical head 230 which are arranged in sequence; the first circular ring 210 is rotatably arranged in an embedded manner at a step which is recessed inwardly at the outlet end of the liquid inlet pipe 110 (for example, a bearing can be installed at the step, and the inner ring of the bearing is fixedly connected to the first circular ring 210), and a plurality of guide plates 240 evenly distributed around the circumference are connected to the side of the first circular ring 210 away from the cylindrical barrel 220, and each guide plate 240 extends into the liquid inlet pipe 110. The cylindrical tube 220 and the hemispherical end cap 230 are connected to each other by a first blade 241, which extends radially along the liquid inlet pipe 110 and is inclined toward the outlet end of the liquid inlet pipe 110; a plurality of first spray holes 221 evenly distributed around the circumference are provided at the connection between the cylindrical tube 220 and the hemispherical end cap 230, and the spray direction of the first spray holes 221 is perpendicular to the axial direction of the liquid inlet pipe 110; a plurality of second spray holes 231 evenly distributed around the circumference are provided on the hemispherical end cap 230, and the spray direction of the second spray holes 231 forms an angle of 45° with the axial direction of the liquid inlet pipe 110. The concentrated liquid flowing in the liquid inlet pipe 110 impacts the first blade 241 from the front, causing the first blade 241 to deflect, thereby rotating the first ring 210, and further pushing the entire nozzle 200 to rotate in the positive direction around the axis of the gun body 100, and the concentrated liquid flowing through the first blade 241 enters the cylindrical barrel 220 and the hemispherical head 230 and is sprayed out from the first spray hole 221 and the second spray hole 231. At this time, the concentrated liquid is ejected in the form of a positive spiral toward the atomizer 300 rotating in the opposite direction around the axis of the gun body 100 to achieve atomization, and enters the waste incinerator to participate in incineration and is completely consumed, thereby achieving "zero emission" of the concentrated liquid. More importantly, it can reduce the amount of nitrogen oxides generated in the flue gas during the waste incineration process from the source, and ultimately reduce the concentration of nitrogen oxides at the outlet of the waste heat boiler of the waste incineration.

[0069] The first blade 241 is disposed on the inner side of the guide plate 240; the outer side of the guide plate 240 is arc-shaped, and it extends along the axial direction of the liquid inlet pipe 110 to be close to the inner side wall of the circumference of the liquid inlet pipe 110, and is used to scrape off the concentrated liquid attached to the inner side wall of the circumference of the liquid inlet pipe 110 and guide it. Specifically, the end of the guide plate 240 away from the first ring 210 is pointed (the thickness gradually decreases), which can reduce the resistance of the concentrated liquid flow to facilitate its guidance. At the same time, the guide plate 240 and the first blade 241 cooperate to scrape off the concentrated liquid attached to the inner side wall of the circumference of the liquid inlet pipe 110 and stir it to reduce its precipitation in the liquid inlet pipe 110, thereby effectively preventing the risk of blockage inside the nozzle 200.

[0070] In order to enhance the stirring effect and further reduce the precipitation of the concentrated liquid in the liquid inlet pipe 110, a plurality of stirring rods 250 evenly distributed around the circumference are connected to the side of the first ring 210 away from the cylindrical tube 220. The stirring rods 250 extend axially along the liquid inlet pipe 110 for a certain length and then bend radially inward toward the liquid inlet pipe 110 to form an L-shaped structure. The stirring rods 250 with the L-shaped structure are located at the rear side of the first blade 241 (downstream in the flow direction of the concentrated liquid) and are spaced apart from the guide plate 240.

[0071] In this embodiment, there are six first spray holes 221 and six second spray holes 231 evenly distributed around the circumference and they are staggered by 30 degrees. There are three guide plates 240 and three first blades 241 evenly distributed around the circumference, and there are three stirring rods 250 evenly distributed around the circumference.

[0072] In order to prevent the nozzle 200 rotating in the forward direction around the axis of the gun body 100 from axial movement, the outlet end of the liquid inlet pipe 110 is detachably connected to a compression sleeve 400 with the same outer diameter as the liquid inlet pipe 110 by means of an external thread connection (see Figure 3 and Figure 6 As shown in the figure, the compression sleeve 400 is provided with a first retaining ring 410, the inner side surface of the first retaining ring 410 is slidably matched with the side of the first ring 210 facing the cylindrical barrel 220, and the outer circumferential wall of the cylindrical barrel 220 is slidably matched with the inner circumferential wall of the first retaining ring 410 (the two matching surfaces can be coated with high-temperature resistant lubricating oil to reduce sliding friction). The first retaining ring 410 is pressed against the first ring 210 to block the axial movement of the nozzle 200, which can improve the stability of the rotation of the nozzle 200, thereby ensuring the atomization effect of the concentrated liquid; at the same time, the outer diameter of the compression sleeve 400 is equal to the outer diameter of the liquid inlet pipe 110, which can reduce the resistance of the compressed gas flow in the air inlet pipe 120, thereby ensuring the atomization efficiency (effective utilization rate) of the compressed gas.

[0073] See also Figure 3 , Figure 7 and Figure 8As shown, the atomizer 300 includes a second circular ring 310 and an atomizing hood 320 connected to each other; the second circular ring 310 is rotatably arranged in an embedded manner at a step that is recessed inwardly at the outlet end of the air inlet pipe 120 (for example, a bearing can be installed at the step, and the inner ring of the bearing is fixedly connected to the second circular ring 310), and a plurality of second blades 311 that are evenly distributed around the circumference and have a torsional direction opposite to that of the first blade 241 are arranged inside the second circular ring 310, and the second blades 311 extend radially along the air inlet pipe 120 and are inclined toward the outlet end of the air inlet pipe 120; the atomizing hood 320 is located at the periphery of the hemispherical head 230 to cover the first spray hole 221 and the second spray hole 231, and the area between the atomizing hood 320 and the hemispherical head 230 forms a first atomizing flow channel, and the outlet of the first atomizing flow channel is opened in the middle of the atomizing hood 320 and is coaxial with the hemispherical head 230. The compressed gas flowing in the air inlet pipe 120 impacts the second blade 311 from the front, causing the second blade 311 to deflect, thereby rotating the second ring 310, and then driving the entire atomizer 300 to rotate in the opposite direction around the axis of the gun body 100, and the compressed gas flowing through the second blade 311 enters the first atomizing flow channel, and blows in the form of a reverse spiral to the concentrated liquid sprayed from the first spray hole 221 and the second spray hole 231, so that it is atomized and enters the garbage incinerator through the outlet of the first atomizing flow channel to participate in incineration. That is to say, the nozzle 200 and the atomizer 300 are arranged to rotate forward and backward relative to each other, so that the concentrated liquid sprayed by the positive spiral and the compressed gas blown by the reverse spiral collide and cut each other, which can improve the atomization effect of the concentrated liquid and effectively solve the problems of difficult garbage ignition, biased material in the incinerator, and uneven combustion.

[0074] The above-mentioned concentrated liquid back-spraying spray gun for nitrogen reduction in the garbage incinerator also includes an end cap 500, and the end cap 500 is provided with a straight cylinder portion 510 and a conical cylinder portion 520 in sequence (see Figure 3 and Fig. 9The straight cylinder portion 510 has the same outer diameter as the air inlet pipe 120, and is detachably connected to the outlet end of the air inlet pipe 120 by means of an external threaded connection. A second retaining ring 511 is provided on the inner side of the connection between the straight cylinder portion 510 and the tapered cylinder portion 520. The second retaining ring 511 is slidably matched with the side of the second ring 310 facing the atomizing hood 320 away from the tapered cylinder portion 520 (the mating surface can be coated with high-temperature resistant lubricating oil to reduce sliding friction), and is used to block the atomizer 300 to prevent axial movement when it rotates in the opposite direction around the axis of the gun body 100; the tapered cylinder portion 520 is located outside the atomizing hood 320 to hold The area between the two forms a second atomizing flow channel, and the outlet of the second atomizing flow channel is opened in the middle of the small end of the conical cylinder 520 and is coaxial with the atomizing hood 320. The inner diameter of the outlet of the second atomizing flow channel is smaller than the inner diameter of the outlet of the first atomizing flow channel to form a confluence area between the two; the atomizing hood 320 is fixedly connected to the second circular ring 310 through a plurality of circumferentially evenly distributed connecting rods 330, and a plurality of circumferentially evenly distributed and inclined diverter plates 321 are provided on the side of the atomizing hood 320 facing the second circular ring 310. The diverter plates 321 and the connecting rods 330 are arranged at intervals from each other and correspond one-to-one with the second blades 311, and are used for the airflow of compressed gas. The compressed gas flowing through the second blade 311 is divided into two parts under the action of the diverter plate 321 and enters the first atomizing flow channel and the second atomizing flow channel respectively. A part of the airflow entering the first atomizing flow channel is atomized for the first time after the concentrated liquid sprayed from the first spray hole 221 and the second spray hole 231 meets the other part of the airflow entering the second atomizing flow channel in the confluence area through the outlet of the first atomizing flow channel and is atomized again, and then enters the garbage incinerator through the outlet of the second atomizing flow channel to participate in incineration. That is to say, through the first atomizing flow channel between the atomizing hood 320 and the hemispherical head 230 and the confluence area between the outlet of the first atomizing flow channel and the outlet of the second atomizing flow channel, the sufficient contact time between the concentrated liquid and the compressed gas can be extended, thereby effectively improving the atomization effect of the concentrated liquid.

[0075] In order to effectively utilize the other part of the airflow entering the second atomizing channel to further enhance the atomization effect of the concentrated liquid, a plurality of first through holes 322 and second through holes 323 evenly distributed around the circumference are provided on the atomizing hood 320. The first through holes 322 and the second through holes 323 correspond to the first spray holes 221 and the second spray holes 231 respectively, and the apertures of the first two are larger than those of the latter two. When the atomizer 300 rotates in the opposite direction around the axis of the gun body 100 under the pneumatic force of the compressed gas until the first through hole 322 is aligned with the first spray hole 221, and the second through hole 323 is aligned with the second spray hole 231, the concentrated liquid sprayed from the first spray hole 221 and the second spray hole 231 is partially atomized into fine droplets by the airflow in the first atomization flow channel, and then enters the second atomization flow channel through the first through hole 322 and the second through hole 323, and is again atomized into droplets with smaller particle size by another part of the airflow in the flow channel, and then merges with the fine droplets at the outlet of the first atomization flow channel in the confluence area to obtain the third atomization, and its particle size is further reduced, and finally enters the garbage incinerator through the outlet of the second atomization flow channel to participate in incineration. That is to say, through the first atomization flow channel, the second atomization flow channel and the confluence area between the outlet of the first atomization flow channel and the outlet of the second atomization flow channel, the sufficient contact time between the concentrated liquid and the compressed gas can be further extended to obtain three atomizations, thereby further improving the atomization effect of the concentrated liquid.

[0076] In this embodiment, six second blades 311 and six splitter plates 321 are evenly distributed around the circumference, six first through holes 322 and six second through holes 323 are evenly distributed around the circumference, and six connecting rods 330 are evenly distributed around the circumference.

[0077] See also Figure 1 , Figure 2 and Fig.10 As shown, the gun body 100 is fixedly mounted on the furnace body (not shown in the figure) of the garbage incinerator through the flange pipe 600. Specifically, the flange pipe 600 includes a flange 610 and a sleeve 620 connected to the middle of the flange 610. After the gun body 100 (the end with the nozzle 200 and the atomizer 300) is inserted into the furnace body, the flange 610 is fixedly connected to the furnace body, and the sleeve 620 is sleeved on the air inlet pipe 120 and is located between the inlet end and the outlet end of the air inlet pipe 120.

[0078] In order to adjust the depth of the gun body 100 extending into the furnace so that the present invention is applicable to different types of waste incinerators, a pair of slide grooves 621 are provided on the inner circumferential wall of the sleeve 620, and a pair of guide rails 121 are provided on the outer circumferential wall of the air inlet pipe 120 along its axial direction, and the guide rails 121 are slidably connected with the slide grooves 621; the sleeve 620 is threadedly connected with a screw 630, which is arranged along the radial direction of the sleeve 620 and is used to lock the sleeve 620 and the air inlet pipe 120. Loosen the screw 630, and the depth of the gun body 100 extending into the furnace can be adjusted by sliding between the guide rail 121 and the slide groove 621.

[0079] In combination with the above, the working principle of the present invention is as follows:

[0080] During operation, the concentrated liquid enters the liquid inlet pipe 110 from the inlet end of the liquid inlet pipe 110, flows toward the outlet end of the liquid inlet pipe 110 under the action of pressure and directly impacts the first blade 241, and its hydraulic force causes the first blade 241 to deflect, thereby rotating the first ring 210, and further pushing the entire nozzle 200 to rotate positively around the axis of the gun body 100, and the concentrated liquid flowing through the first blade 241 is stirred by the L-shaped stirring rod 250 and enters the cylindrical barrel 220 and the hemispherical head 230 and is sprayed from the first spray hole 221 and the second spray hole 231 to the first atomizing flow channel in the form of a positive spiral; at the same time, the compressed gas enters the air inlet pipe 120 from the inlet end of the air inlet pipe 120, flows toward the outlet end of the air inlet pipe 120 under the action of pressure and directly impacts the second blade 311, and its air force causes the second blade 311 to deflect, thereby rotating the second ring 310, and further pushing the entire atomizer 30 0 rotates in the opposite direction around the axis of the gun body 100, and the compressed gas flowing through the second blade 311 is divided into two parts under the action of the splitter plate 321 and enters the first atomization flow channel and the second atomization flow channel respectively. A part of the airflow entering the first atomization flow channel atomizes the concentrated liquid sprayed from the first nozzle hole 221 and the second nozzle hole 231 into fine droplets for the first time, and then enters the second atomization flow channel through the first through hole 322 and the second through hole 323, and is atomized into droplets with smaller particle size by another part of the airflow in the flow channel again. After that, it merges with the fine droplets at the outlet of the first atomization flow channel in the confluence area to obtain the third atomization, and its particle size is further reduced. Finally, it enters the waste incinerator through the outlet of the second atomization flow channel to participate in the incineration and is completely consumed, thereby realizing the "zero emission" of the concentrated liquid. More importantly, it can reduce the generation of flue gas nitrogen oxides in the process of waste incineration from the source, and finally reduce the concentration of nitrogen oxides at the outlet of the waste heat boiler of the waste incineration.

[0081] The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A concentrated liquid back-spray gun for nitrogen reduction in a garbage incinerator, characterized in that: include: The gun body has a liquid inlet pipe for concentrated liquid and an air inlet pipe for compressed gas which are arranged inside and outside; A nozzle, movably disposed at the outlet end of the liquid inlet pipe, for spraying the concentrated liquid; and An atomizer, movably disposed at the outlet end of the air inlet pipe and located outside the nozzle, for atomizing the concentrated liquid to enter the waste incinerator for incineration; Wherein, the nozzle can rotate in the positive direction around the axis of the gun body under the hydraulic driving action of the concentrated liquid, and the atomizer can rotate in the reverse direction around the axis of the gun body under the pneumatic driving action of the compressed gas.

2. The concentrated liquid back-spray gun for nitrogen reduction in a garbage incinerator according to claim 1, characterized in that: The nozzle comprises a first circular ring, a cylindrical tube and a hemispherical head which are arranged in sequence; The first circular ring is rotatably arranged in an embedded manner at a step recessed inwardly at the outlet end of the liquid inlet pipe, and a plurality of guide plates evenly distributed around the circumference are connected to the side of the first circular ring away from the cylindrical tube, each of the guide plates extends into the interior of the liquid inlet pipe and is provided with a first blade, and the first blade extends radially along the liquid inlet pipe and is inclined toward the outlet end of the liquid inlet pipe; A plurality of first spray holes evenly distributed around the circumference are provided at the connection between the cylindrical tube and the hemispherical end cap, and the spraying direction of the first spray holes is perpendicular to the axial direction of the liquid inlet pipe; The hemispherical end cap is provided with a plurality of second spray holes evenly distributed around the circumference, and the spraying direction of the second spray holes forms an angle of 45° with the axial direction of the liquid inlet pipe.

3. The concentrated liquid back-spraying gun for nitrogen reduction in a garbage incinerator according to claim 2 is characterized in that: The first blade is arranged on the inner side of the guide plate; The outer side surface of the guide plate is arc-shaped and extends axially along the liquid inlet pipe to be close to the inner circumferential wall of the liquid inlet pipe, and is used to scrape off the concentrated liquid attached to the inner circumferential wall of the liquid inlet pipe and guide it.

4. The concentrated liquid back-spraying spray gun for nitrogen reduction in a garbage incinerator according to claim 2 or 3, characterized in that: A plurality of stirring rods evenly distributed around the circumference are also connected to a side of the first ring away from the cylindrical barrel; The stirring rod extends along the axial direction of the liquid inlet pipe for a certain length and then bends radially inward toward the liquid inlet pipe to form an L-shaped structure; The L-shaped stirring rod is located at the rear side of the first blade and is spaced apart from the guide plate.

5. The concentrated liquid back-spraying gun for nitrogen reduction in a garbage incinerator according to claim 4 is characterized in that: The outlet end of the liquid inlet pipe is detachably connected with a compression sleeve having the same outer diameter as the liquid inlet pipe; The pressing sleeve is provided with a first retaining ring; The inner side surface of the first retaining ring is slidably matched with the first circular ring on a side facing the cylindrical barrel; The outer circumferential wall of the cylindrical barrel is slidably matched with the inner circumferential wall of the first retaining ring.

6. The concentrated liquid back-spraying spray gun for nitrogen reduction in a garbage incinerator according to claim 2 or 5, characterized in that: The atomizer comprises a second circular ring and an atomizing cover connected to each other; The second ring is rotatably arranged in an embedded manner at a step recessed inwardly at the outlet end of the air intake pipe, and a plurality of second blades are arranged inside the second ring evenly distributed around the circumference and with a twisting direction opposite to that of the first blades, and the second blades extend radially along the air intake pipe and are inclined toward the outlet end of the air intake pipe; The atomizing hood is located at the periphery of the hemispherical head to cover the first spray hole and the second spray hole, and the area between the atomizing hood and the hemispherical head forms a first atomizing flow channel. The outlet of the first atomizing flow channel is opened in the middle of the atomizing hood and is coaxial with the hemispherical head.

7. The concentrated liquid back-spraying spray gun for nitrogen reduction in a garbage incinerator according to claim 6 is characterized in that: It also includes an end cap, which is provided with a straight cylinder portion and a tapered cylinder portion in sequence; The straight tube portion has the same outer diameter as the air inlet pipe, and is detachably connected to the outlet end of the air inlet pipe. A second retaining ring is provided on the inner side of the connection between the straight tube portion and the conical tube portion. The second retaining ring is slidably matched with the second ring on the side facing the atomizing hood to block the atomizer to prevent axial movement when the atomizer rotates in the opposite direction around the axis of the gun body. The conical cylinder is located at the periphery of the atomizing hood so that the area between the two forms a second atomizing flow channel, the outlet of the second atomizing flow channel is opened in the middle of the small end of the conical cylinder and is coaxial with the atomizing hood, and the inner diameter of the outlet of the second atomizing flow channel is smaller than the inner diameter of the outlet of the first atomizing flow channel so as to form a confluence area between the two; The atomizing hood is fixedly connected to the second circular ring through a plurality of connecting rods evenly distributed around the circumference. A plurality of diverter plates evenly distributed around the circumference and inclined are arranged on the side of the atomizing hood facing the second circular ring. The diverter plates and the connecting rods are arranged at intervals and correspond one-to-one with the second blades for compressing the gas flow.

8. The concentrated liquid back-spraying spray gun for nitrogen reduction in a garbage incinerator according to claim 7, characterized in that: The atomizing cover is provided with a plurality of first through holes and second through holes evenly distributed around the circumference; The first through hole and the second through hole correspond to the first spray hole and the second spray hole respectively, and the apertures of the first two are larger than the apertures of the latter two.

9. The concentrated liquid back-spraying gun for nitrogen reduction in a garbage incinerator according to any one of claims 1 to 3, 5, 7 and 8, characterized in that: The gun body is fixedly mounted on the furnace body of the garbage incinerator through a flange pipe; The flange pipe includes a flange plate and a sleeve connected to the middle of the flange plate. After the gun body is inserted into the furnace body, the flange plate is fixedly connected to the furnace body. The sleeve is sleeved on the air inlet pipe and is located between the inlet end and the outlet end of the air inlet pipe.

10. The concentrated liquid back-spraying gun for nitrogen reduction in a garbage incinerator according to claim 9, characterized in that: A pair of slide grooves are provided on the inner circumferential wall of the sleeve, and a pair of guide rails are provided on the outer circumferential wall of the intake pipe along its axial direction, and the guide rails are slidably connected with the slide grooves; The sleeve is threadedly connected with screws, which are arranged radially along the sleeve and are used for locking the sleeve and the air inlet pipe.

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