A denitrification system in a rotary kiln

Abstract

The present invention provides a de-stocking system in a rotary kiln, which relates to the technical field of rotary kilns, and solves the technical problem that the existing de-stocking system is difficult to arrange on a rotary kiln; the system comprises a base, a kiln body, a de-stocking liquid storage unit, a spray gun assembly and a supply unit; the kiln body is rotatably arranged on the base, the de-stocking liquid storage unit is fixedly arranged on the base, the spray gun assembly comprises a plurality of spray guns, each spray gun has an atomizing nozzle extending into the kiln body, and the supply unit comprises a fixed ring and a rotating ring, the fixed ring is fixedly arranged on the base and sleeved on the kiln body, the rotating ring is fixedly sleeved on the kiln body and fits the fixed ring, a first annular groove is provided on the side of the fixed ring facing the rotating ring, a second annular groove is provided on the side of the rotating ring facing the fixed ring, the first annular groove is rotatably connected to the second annular groove, the first annular groove is connected to the output end of the de-stocking liquid storage unit, and the second annular groove is connected to each spray gun. The de-stocking system in a rotary kiln of the present invention is relatively convenient to arrange.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kilns, and in particular to a denitration system in a rotary kiln. Background Art

[0002] NOx is one of the main pollutants in the atmosphere, mainly composed of NO and NO 2 It can cause pollution such as acid rain and photochemical smog, which has a huge adverse impact on human health, and can also cause serious damage to the ecological environment, industrial equipment, and buildings.

[0003] In the production process of using a rotary kiln to prepare zinc oxide or other products, a large amount of NOx will be generated in the rotary kiln, which will cause serious air pollution if directly discharged into the atmosphere. The existing denitrification system of a rotary kiln generally includes a liquid supply tank and a spray gun group; wherein the spray gun group includes a liquid supply pipe coaxial with the kiln body, and also includes a plurality of spray guns arranged on the kiln body. The liquid supply pipe and the liquid supply tank are connected through a dynamic and static joint to realize the transportation of the reducing liquid from the static storage tank to the dynamic liquid supply pipe. The above-mentioned reducing liquid is generally a urea solution, and urea reacts with NOx to generate N 2 and H 2 O to remove NOx and achieve denitrification.

[0004] However, in the existing rotary kiln which is not provided with the above-mentioned denitration system, it is rather troublesome to arrange the above-mentioned liquid supply pipe coaxial with the kiln body. Summary of the invention

[0005] To this end, the present invention proposes a denitration system in a rotary kiln to solve the technical problem that the existing denitration system is difficult to arrange on a rotary kiln.

[0006] The technical solution of the present invention is as follows:

[0007] A denitration system in a rotary kiln, comprising a base and a kiln body, wherein the kiln body is rotatably arranged on the base, and further comprising:

[0008] A denitration liquid storage unit is fixedly mounted on the base;

[0009] A spray gun assembly, comprising a plurality of spray guns, each of which is arranged at intervals around the circumference of the kiln body and has an atomizing nozzle extending into the kiln body;

[0010] The supply unit comprises a fixed ring and a rotating ring; the fixed ring is fixedly mounted on the base and sleeved on the kiln body, and the rotating ring is fixedly sleeved on the kiln body and fits with the fixed ring;

[0011] A first annular groove is provided on the side of the fixed ring facing the rotating ring, and a second annular groove is provided on the side of the rotating ring facing the fixed ring. The first annular groove is rotationally connected to the second annular groove; and the first annular groove is connected to the output end of the denitrification liquid storage unit, and the second annular groove is connected to each of the spray guns.

[0012] Further, the denitration liquid storage unit includes a first storage tank, a second storage tank, a mixing tank, a first pump body and a second pump body;

[0013] The first storage tank is used to store denitrification liquid, the second storage tank is used to store additive liquid, the first pump body is used to pump the denitrification liquid from the first storage tank to the mixing tank, and the second pump body is used to pump the additive liquid from the second storage tank to the mixing tank.

[0014] Furthermore, the mixing box is provided with a fixed disk and a stirring member;

[0015] The stirring member comprises a rod body and two blades, the rod body is rotatably arranged on the mixing box and has an extending section extending into the mixing box, and the two blades are respectively arranged on the extending section; the stirring member is provided with two passages, the input ports of the two passages are located on the top surface of the rod body, and the output ports of the two passages are correspondingly arranged on the side surfaces of the two blades;

[0016] The fixed disk is fixed on the mixing box and fits with the top end surface of the rod body, and the fixed disk is provided with two arc grooves that are rotationally connected to the two passages; one of the two arc grooves is connected to the output end of the first pump body, and the other of the two arc grooves is connected to the output end of the second pump body.

[0017] Furthermore, a partition is provided in the first storage box, and the partition divides the cavity in the first storage box into an upper cavity and a lower cavity, and the upper cavity is used to store denitrification agent particles;

[0018] The partition is provided with a material drop opening, and a push plate is slidably provided on the lower side of the partition, and a material blocking plate is provided on the push plate. A solvent inlet is provided on the side wall of the lower cavity, and the solvent inlet is opposite to the push plate.

[0019] As the thrust of the solvent sprayed from the solvent inlet on the thrust plate increases, the blocking area of ​​the material blocking plate on the material drop opening decreases.

[0020] Furthermore, a mounting plate is provided on the partition, and the mounting plate is located on a side of the thrust plate facing away from the solvent inlet;

[0021] An elastic member is provided between the mounting plate and the thrust plate, and the elastic member applies a thrust to the thrust plate, and the thrust pushes the thrust plate to move toward the direction close to the solvent inlet.

[0022] Furthermore, along the direction in which the solvent inlet pushes the thrust plate, the width of the blanking opening gradually widens.

[0023] Furthermore, there are multiple spray gun assemblies, and each of the spray gun assemblies is arranged at intervals along the length direction of the kiln body;

[0024] Each of the spray gun assemblies further comprises a main pipe body, which is sleeved on the kiln body, and one end of each of the spray guns is communicated with the inner cavity of the main pipe body, and the other end extends into the kiln body;

[0025] A connecting pipe is provided between two adjacent main pipe bodies, and the connecting pipe is used to connect the inner cavities of the two adjacent main pipe bodies.

[0026] Furthermore, it also includes a compressed gas output mechanism; a connecting hole is provided on the outer circumferential surface of the fixing ring, and the connecting hole is connected to the first annular groove; and a gas output end of the compressed gas output mechanism is connected to the connecting hole.

[0027] The working principle and beneficial effects of the present invention are:

[0028] The rotary kiln furnace denitration system provided by the present invention is provided with the above-mentioned fixed ring and rotating ring, wherein the fixed ring is fixed relative to the base, and the rotating ring rotates with the kiln body, and the fixed ring and the rotating ring can keep in contact during the relative rotation, that is, the first annular groove and the second annular groove on the fixed ring and the rotating ring can keep in communication, and then the static denitration liquid storage unit can transport the denitration liquid to the static fixed ring, and can enter the dynamic rotating ring, and because the spray gun assembly is fixed relative to the rotating ring, the denitration liquid can enter the spray gun assembly from the rotating ring, and finally complete the transport of the denitration liquid from the static denitration liquid storage unit to the dynamic spray gun assembly. Compared with the existing delivery pipe coaxial with the kiln body, it is difficult to rearrange the delivery pipe on the already installed kiln body, while it is relatively simple to sleeve a fixed ring and a rotating ring on the already installed kiln body, that is to say, the scheme of the present invention can be more conveniently installed on the already arranged rotary kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Figure 1 A schematic diagram of the overall structure of a denitration system in a rotary kiln provided in an embodiment of the present invention;

[0031] Figure 2 for Figure 1A partial enlarged view of the middle A;

[0032] Figure 3 A schematic structural diagram of a denitration liquid storage unit provided in an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the rotation principle of the stirring member provided in an embodiment of the present invention;

[0034] Figure 5 A schematic diagram of the structure of a first storage box provided in an embodiment of the present invention;

[0035] Figure 6 The partition edge provided by the embodiment of the present invention Figure 5 Middle F direction view;

[0036] Figure 7 A left side view of a spray gun assembly provided in accordance with an embodiment of the present invention.

[0037] In the figure: 100-kiln body, 200-desnitrification liquid storage unit, 210-first storage box, 211-first pump body, 212-partition plate, 2121-dropping port, 2122-thrust plate, 2123-blocking plate, 2124-mounting plate, 2125-elastic member, 213-upper cavity, 214-lower cavity, 220-second storage box, 221-second pump body, 230-mixing box, 231-stirring member, 2311-rod body, 231 2-blades, 232-fixed disk, 2321-third annular groove, 2322-fourth arcuate groove, 241-first passage, 242-second passage, 250-solvent storage box, 251-solvent injection hole, 300-spray gun assembly, 310-spray gun, 311-atomizing nozzle, 400-supply unit, 410-fixed ring, 411-first annular groove, 420-rotating ring, 421-second annular groove, 500-compressed gas output mechanism. DETAILED DESCRIPTION

[0038] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] This embodiment provides a denitration system in a rotary kiln. Figure 1As shown, it includes a base, a kiln body 100, a denitration liquid storage unit 200, a spray gun assembly 300 and a supply unit 400. The kiln body 100 is rotatably arranged on the base, and the denitration liquid storage unit 200 is fixedly arranged on the base. The spray gun assembly 300 includes a plurality of spray guns 310, each of which is arranged at intervals around the circumference of the kiln body 100 and has an atomizing nozzle 311 extending into the kiln body 100.

[0040] The supply unit 400 includes a fixed ring 410 and a rotating ring 420. The fixed ring 410 is fixedly mounted on the base and sleeved on the kiln body 100. The rotating ring 420 is fixedly sleeved on the kiln body 100 and fits with the fixed ring 410. A first annular groove 411 is provided on the side of the fixed ring 410 facing the rotating ring 420, and a second annular groove 421 is provided on the side of the rotating ring 420 facing the fixed ring 410. The first annular groove 411 is rotatably connected to the second annular groove 421, and the first annular groove 411 is connected to the output end of the denitrification liquid storage unit 200, and the second annular groove 421 is connected to each spray gun 310.

[0041] In the rotary kiln furnace denitration system of this embodiment, a first annular groove 411 is provided on the fixed ring 410, and a second annular groove 421 is provided on the rotating ring 420. When the rotating ring 420 rotates with the kiln body 100 relative to the fixed ring 410, the first annular groove 411 and the second annular groove 421 remain in communication; thus, the static denitration liquid storage unit 200 can fill the same static first annular groove 411 with denitration liquid. Since the first annular groove 411 and the second annular groove 421 always remain in communication, the denitration liquid in the first annular groove 411 can enter the second annular groove 421. At the same time, the rotating ring 420 and each spray gun 310 are fixed on the kiln body 100, that is, the rotating ring 420 and each spray gun 310 are relatively fixed, so the denitration liquid in the second annular groove 421 can be sprayed into the kiln body 100 through each spray gun 310. That is, the denitration liquid is finally transported from the static denitration liquid storage unit 200 to the dynamic spray gun 310.

[0042] The current denitration system is to set a liquid infusion pipe coaxial with the kiln body 100 on the kiln body 100, and the static denitration liquid storage tank conveys the denitration liquid to the dynamic liquid infusion pipe, and then the denitration liquid is conveyed to the spray gun 310 by the liquid infusion pipe. Since the overall length of the kiln body 100 is usually long, it is extremely difficult to add a liquid infusion pipe to the kiln body 100 that has been put into use. In contrast, the solution of this embodiment is to add a fixed ring 410 and a rotating ring 420 to the periphery of the kiln body 100. This solution is not limited by the length of the kiln body 100, and it is constructed on the periphery of the kiln body 100, which does not affect the internal structure of the kiln body 100. Therefore, the solution of this embodiment is relatively simple to install. In other words, the solution of this embodiment is more suitable for the denitration modification of the existing rotary kiln that has been put into use.

[0043] In terms of specific structure, the base can be the ground, and the specific structure of the base and the kiln body 100 can refer to the prior art, which will not be described in detail here. Figure 1 and Figure 2 As shown, the fixed ring 410 of this embodiment is fixed on the base and sleeved on the kiln body 100, and the cross section of the fixed ring 410 is square. The rotating ring 420 of this embodiment is fixedly sleeved on the kiln body 100 and abuts against the fixed ring 410, and the cross section of the rotating ring 420 is also square.

[0044] The first annular groove 411 is arranged on the side of the fixed ring 410 that is in contact with the rotating ring 420, and the first annular groove 411 is coaxial with the fixed ring 410, or the kiln body 100. The second annular groove 421 is arranged on the side of the rotating ring 420 that is in contact with the fixed ring 410, and the second annular groove 421 is coaxial with the rotating ring 420 or the kiln body 100, and the middle diameter of the second annular groove 421 is equal to the middle diameter of the first annular groove 411. Therefore, when the rotating ring 420 rotates relative to the fixed ring 410, the first annular groove 411 and the second annular groove 421 are connected, or liquid can be exchanged between the first annular groove 411 and the second annular groove 421. It should be noted that the middle diameter of the first annular groove 411 may also be different from the middle diameter of the second annular groove 421, as long as the inner diameter of one of them is larger than the inner diameter of the other and smaller than the outer diameter of the other.

[0045] In this embodiment, reference Figure 2 As shown, a first communication hole is provided on the fixed ring 410, and the first communication hole intersects with the first annular groove 411, and a second communication hole is provided on the rotating ring 420, and the second communication hole intersects with the second annular groove 421. The above-mentioned denitrification liquid storage unit 200 is connected to the first communication hole through a pipeline, and the second communication hole is connected to each spray gun 310 in the spray gun assembly 300 through a pipeline.

[0046] Therefore, if Figure 2 In the direction indicated by the middle arrow, when the kiln body 100 rotates, the denitrification liquid in the denitrification liquid storage unit 200 can enter the first annular groove 411 and the second annular groove 421 through the pipeline, and then be transported to each spray gun 310 through the pipeline, and then sprayed into the kiln body 100 by each spray gun 310, thereby completing the transportation of the denitrification liquid from the static denitrification liquid storage unit 200 to the dynamic kiln body 100.

[0047] Based on the above structure, this embodiment further provides an easy-to-use denitration liquid storage unit 200; Figure 1 and Figure 3As shown, the denitration liquid storage unit 200 of this embodiment includes a first storage tank 210, a second storage tank 220, a mixing tank 230, a first pump body 211 and a second pump body 221. The first storage tank 210 is used to store the denitration liquid, the second storage tank 220 is used to store the additive liquid, the first pump body 211 is used to pump the denitration liquid from the first storage tank 210 to the mixing tank 230, and the second pump body 221 is used to pump the additive liquid from the second storage tank 220 to the mixing tank 230.

[0048] That is, the denitrification liquid stored in the first storage tank 210 and the additive liquid stored in the second storage tank 220 of this embodiment are mixed in the mixing tank 230, and then pumped to the spray gun 310 by the mixing tank 230, and then sprayed into the kiln body 100 by the spray gun 310. The denitrification liquid can be, for example, a high-concentration urea solution, and the additive liquid can be water, that is, a high-concentration urea solution is diluted with water before use.

[0049] In this embodiment, by providing the above-mentioned first storage box 210, second storage box 220 and mixing box 230, the concentration of the denitrification liquid can be conveniently adjusted to achieve a better denitrification effect by filling different proportions of denitrification liquid and additives into the mixing box 230. Specifically, a detection mechanism can be arranged in the gas discharge port of the rotary kiln, and the detection mechanism detects the various components of the exhaust gas of the rotary kiln, and adjusts the concentration of the denitrification liquid according to the components of the exhaust gas, thereby achieving a better denitrification effect.

[0050] Based on the above structure, this embodiment provides a mixing box 230 with a better structure. Specifically, refer to Figure 3 As shown, in this embodiment, a fixed disk 232 and a stirring member 231 are provided on the mixing box 230; wherein the stirring member 231 comprises a rod body 2311 and two blades 2312, and the rod body 2311 is rotatably provided on the mixing box 230 and has an extending section extending into the mixing box 230, and the two blades 2312 are fixedly provided on the extending section. Two passages are constructed on the stirring member 231, and the input ports of the two passages are respectively located on the top surface of the rod body 2311, and the output ports of the two passages are correspondingly provided on the side surfaces of the two blades 2312.

[0051] The fixed disk 232 is fixed on the mixing box 230 and fits with the top surface of the rod body 2311. Two annular grooves are provided on the fixed disk 232. The annular grooves are connected to the input ports of the two passages one by one, and one of the two arc grooves is connected to the output end of the first pump body 211, and the other of the two arc grooves is connected to the output end of the second pump body 221.

[0052] For the convenience of description, in this embodiment, the passage for the denitration liquid to flow is called the first passage 241, and the passage for the additive liquid to flow is called the second passage 242. In this embodiment, the first pump body 211 delivers the denitration liquid to the first passage 241, and discharges it into the mixing box 230 through the output port of the first passage 241. Figure 4 As shown, when the denitrification liquid is discharged from the outlet on the corresponding blade 2312, it will provide a reaction force to the blade 2312, prompting the blade 2312 to rotate; when the additive liquid is discharged from the outlet on the other blade 2312, it will also provide a reaction force to the blade 2312, prompting the other blade 2312 to rotate. By setting the rotation directions of the two blades 2312 to be the same, the stirring member 231 can be rotated to stir the denitrification liquid and additive liquid entering the mixing box 230. Figure 4 As shown, the arrow at the blade 2312 is the spraying direction of the liquid, and the arrow at the rod body 2311 indicates the rotation direction of the rod body 2311. In general, the mixing box 230 of this embodiment and the stirring member 231 can utilize the conveying power of the denitrification liquid and the additive liquid to stir, so that the denitrification liquid and the additive liquid are mixed more evenly in the mixing box 230.

[0053] For specific structure, refer to Figure 3 As shown, in this embodiment, the above-mentioned rod body 2311 includes a large diameter section and a small diameter section, and two independent passages are constructed on the large diameter section, the small diameter section and the blade 2312, and the input ports of the two passages are respectively located on the top surface of the large diameter section, and the output ports of the two passages are correspondingly located on the sides of the two blades 2312, wherein the output ports are specifically located on the plane of the blade 2312 that is perpendicular to the rotation plane of the stirring member 231.

[0054] refer to Figure 3 As shown, in this embodiment, two arc grooves are provided on the bottom end surface of the fixed disk 232, which are respectively referred to as the third annular groove 2321 and the fourth arc groove for the convenience of description; wherein the third annular groove 2321 is opposite to the input port of the first passage 241, specifically, when the stirring member 231 rotates, the third annular groove 2321 and the input port of the first passage 241 are always connected. The fourth arc groove is opposite to the input port of the second passage 242.

[0055] A third connecting hole and a fourth connecting hole are provided on the outer peripheral surface of the fixed disk 232, wherein the third connecting hole is connected to the third annular groove 2321, and the fourth connecting hole is connected to the fourth arc groove; thus, the first pump body 211 can transport the denitrification liquid to the mixing box 230 through the third connecting hole, and the second pump body 221 can transport the denitrification liquid to the mixing box 230 through the fourth connecting hole.

[0056] The power applied by the first pump body 211 to the denitrification liquid and the power applied by the second pump body 221 to the additive liquid can cause the stirring member 231 to rotate. Compared with the additional power device for driving the stirring member 231 to rotate, the solution of this embodiment can simplify the structure of the stirring member 231 and reduce the cost of adding the stirring power device. Compared with not stirring the liquid in the mixing box 230, the solution of this embodiment can make the denitrification liquid and the additive liquid mix more evenly, so that after being sprayed into the kiln body 100, it can have a better denitrification effect.

[0057] Based on the above structure, this embodiment further provides a first storage box 210 with a better structure. Figure 5 As shown, a partition 212 is provided in the first storage box 210, and the partition 212 divides the cavity in the first storage box 210 into an upper cavity 213 and a lower cavity 214, wherein the upper cavity 213 is used to store denitrifying agent particles, such as urea particles. A material drop opening 2121 is provided on the partition 212, and a thrust plate 2122 is slidably provided on the lower side of the partition 212, and a material blocking plate 2123 is also provided on the thrust plate 2122. A solvent injection hole 251 is provided on the side wall of the lower cavity 214, and the solvent injection hole 251 is connected to the external solvent storage box 250. The solvent injection hole 251 is opposite to the thrust plate 2122, and as the thrust of the solvent injected into the solvent injection hole 251 on the support plate increases, the material blocking plate 2123 slides in the direction of reducing the blocking area of ​​the material drop opening 2121.

[0058] That is to say, in the storage box of this embodiment, when the solvent is sprayed into the mixing box 230 from the solvent injection hole 251, as the injection force of the solvent increases, the blocking of the drop port 2121 by the baffle plate 2123 will decrease; wherein, the increase in the injection force of the solvent indicates that the amount of solvent entering the lower cavity 214 per unit time increases, while the blocking of the drop port 2121 by the baffle plate 2123 decreases, and the amount of denitrification agent particles falling into the lower cavity 214 per unit time increases.

[0059] In this embodiment, by providing the first storage box 210, when the demand for the denitrification agent solution increases, the force of the solvent spraying into the lower cavity 214 can be increased, and the speed of adding the denitrification agent particles can also be increased, thereby maintaining a stable concentration of the denitrification liquid in the lower cavity 214. Compared with the method of controlling the speed of adding the denitrification agent particles and the solvent separately by electronic control, the solution of this embodiment is simple in structure and not easy to be damaged.

[0060] On this basis, reference Figure 5As shown, in this embodiment, a mounting plate 2124 is provided on the partition 212, and the mounting plate 2124 is located on the side of the thrust plate 2122 facing away from the solvent inlet; an elastic member 2125 is provided between the mounting plate 2124 and the thrust plate 2122, and the elastic member 2125 applies a thrust to the thrust plate 2122, and the thrust pushes the thrust plate 2122 to move toward the direction close to the solvent inlet.

[0061] That is, in this embodiment, the solvent pushes the push plate 2122, and when the push plate 2122 slides toward the mounting plate 2124, the elastic member 2125 is compressed, and when the spraying force of the solvent decreases, the elastic member 2125 can push the push plate 2122 to reset due to its own elastic recovery. The elastic member 2125 can be, for example, a spring or other elastic component.

[0062] In this embodiment, reference Figure 5 and 6 As shown, along the pushing direction of the solvent on the thrust plate 2122, the width of the above-mentioned blanking opening 2121 gradually widens.

[0063] As the initial velocity of the solvent when entering the lower cavity 214 increases, the pushing force on the thrust plate 2122 also increases, but the two are not in equal proportion. Specifically, as the initial velocity of the solvent when entering the lower cavity 214 increases, the pushing force on the thrust plate 2122 also increases, but the increase in the thrust on the thrust plate 2122 is small. In this embodiment, by setting the blanking port 2121 in the above manner, the thrust of the solvent on the thrust plate 2122, that is, the speed of the solvent and the blanking area of ​​the blanking port 2121 can be made to change in proportion, that is, the addition speed of the denitrification agent particles and the solvent can be made to change in proportion, so that the concentration of the denitrification liquid in the lower cavity 214 remains stable. It should be noted that the specific width change mode of the blanking port 2121 is related to the Hooke coefficient of the elastic member 2125 and the friction force on the thrust plate 2122, which can be obtained by experimental methods and will not be repeated here.

[0064] In this embodiment, reference Figure 1 and Figure 7 As shown, there are multiple spray gun assemblies 300, and each spray gun assembly 300 is arranged at intervals along the length direction of the kiln body 100; each spray gun assembly 300 also includes a main pipe body, which is sleeved on the kiln body 100, and one end of each spray gun 310 is connected to the inner cavity of the main pipe body, and the other end extends into the kiln body 100; a connecting pipe is provided between two adjacent main pipe bodies, and the connecting pipe is used to connect the inner cavities of the two adjacent main pipe bodies.

[0065] That is, in the spray gun assembly 300 of this embodiment, the denitrification liquid enters each main pipe through the fourth arc groove 2322 via each connecting pipe, and the denitrification liquid in each main pipe is then atomized and sprayed into the kiln body 100 through each spray gun 310 thereon.

[0066] By providing a plurality of spray gun assemblies 300, the denitration efficiency of the denitration system can be improved, and a better denitration effect can be achieved.

[0067] In this embodiment, reference Figure 1 As shown, the denitration system further includes a compressed gas output mechanism 500 ; and a connecting hole is provided on the outer circumferential surface of the fixed ring 410 , the connecting hole is connected to the first annular groove 411 , and the gas output end of the compressed gas output mechanism 500 is connected to the connecting hole.

[0068] In this embodiment, by providing the compressed gas output mechanism 500, the compressed gas and the denitrification liquid can be mixed and sprayed into the kiln body 100. By adjusting the ratio of the compressed gas to the denitrification liquid, the injection speed of the denitrification liquid into the kiln body 100 can be adjusted while maintaining sufficient pressure.

[0069] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary kiln denitrification system, comprising a base and a kiln body (100), wherein the kiln body (100) is rotatably arranged on the base, Features: Also includes: A denitration liquid storage unit (200) is fixedly mounted on the base; A spray gun assembly (300) comprises a plurality of spray guns (310), each of the spray guns (310) being arranged at intervals around the circumference of the kiln body (100) and each having an atomizing nozzle (311) extending into the kiln body (100); The supply unit (400) comprises a fixed ring (410) and a rotating ring (420); the fixed ring (410) is fixedly mounted on the base and sleeved on the kiln body (100); the rotating ring (420) is fixedly sleeved on the kiln body (100) and fits with the fixed ring (410); A first annular groove (411) is provided on the side of the fixed ring (410) facing the rotating ring (420), and a second annular groove (421) is provided on the side of the rotating ring (420) facing the fixed ring (410), and the first annular groove (411) is rotatably connected to the second annular groove (421); and the first annular groove (411) is connected to the output end of the denitrification liquid storage unit (200), and the second annular groove (421) is connected to each of the spray guns (310); The denitration liquid storage unit (200) comprises a first storage box (210), a second storage box (220), a mixing box (230), a first pump body (211) and a second pump body (221); The first storage tank (210) is used to store denitration liquid, the second storage tank (220) is used to store additive liquid, the first pump body (211) is used to pump the denitration liquid from the first storage tank (210) to the mixing tank (230), and the second pump body (221) is used to pump the additive liquid from the second storage tank (220) to the mixing tank (230); The mixing box (230) is provided with a fixed disk (232) and a stirring member (231); The stirring member (231) comprises a rod body (2311) and two blades (2312); the rod body (2311) is rotatably arranged on the mixing box (230) and has an extending section extending into the mixing box (230); the two blades (2312) are respectively arranged on the extending section; the stirring member (231) is provided with two passages; the input ports of the two passages are located on the top end surface of the rod body (2311); and the output ports of the two passages are correspondingly arranged on the side surfaces of the two blades (2312); The fixed disk (232) is fixed on the mixing box (230) and fits with the top end surface of the rod body (2311), and the fixed disk (232) is provided with two arc grooves that are rotatably connected to the two passages; one of the two arc grooves is connected to the output end of the first pump body (211), and the other of the two arc grooves is connected to the output end of the second pump body (221).

2. The rotary kiln denitrification system according to claim 1, It is characterized in that A partition (212) is provided in the first storage box (210), and the partition (212) divides the cavity in the first storage box (210) into an upper cavity (213) and a lower cavity (214), and the upper cavity (213) is used to store denitrification agent particles; The partition (212) is provided with a material drop opening (2121), and a push plate (2122) is slidably provided on the lower side of the partition (212), and a material blocking plate (2123) is provided on the push plate (2122); a solvent inlet is provided on the side wall of the lower cavity (214), and the solvent inlet is opposite to the push plate (2122); As the thrust of the solvent sprayed from the solvent inlet on the thrust plate (2122) increases, the blocking area of ​​the material blocking plate (2123) on the material drop opening (2121) decreases.

3. The denitration system in the rotary kiln according to claim 2, It is characterized in that The partition plate (212) is provided with a mounting plate (2124), and the mounting plate (2124) is located on a side of the thrust plate (2122) facing away from the solvent inlet; An elastic member (2125) is provided between the mounting plate (2124) and the thrust plate (2122), and the elastic member (2125) applies a thrust to the thrust plate (2122), and the thrust pushes the thrust plate (2122) to move in a direction close to the solvent inlet.

4. The denitration system in the rotary kiln according to claim 3, It is characterized in that Along the direction in which the solvent inlet pushes the thrust plate (2122), the width of the blanking opening (2121) gradually widens.

5. The denitration system in a rotary kiln according to any one of claims 1 to 4, It is characterized in that There are a plurality of spray gun assemblies (300), and each of the spray gun assemblies (300) is arranged at intervals along the length direction of the kiln body (100); Each of the spray gun assemblies (300) further comprises a main pipe body, which is sleeved on the kiln body (100), and one end of each of the spray guns (310) is connected to the inner cavity of the main pipe body, and the other end extends into the kiln body (100); A connecting pipe is provided between two adjacent main pipe bodies, and the connecting pipe is used to connect the inner cavities of the two adjacent main pipe bodies.

6. The rotary kiln denitrification system according to any one of claims 1 to 4, It is characterized in that It also includes a compressed gas output mechanism (500); a connecting hole is provided on the outer peripheral surface of the fixing ring (410), and the connecting hole is connected to the first annular groove (411); and a gas output end of the compressed gas output mechanism (500) is connected to the connecting hole.

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