A rotary kiln flue gas denitrification device

Abstract

The present invention discloses a rotary kiln flue gas denitrification device, which relates to the technical field of rotary kiln flue gas treatment, and includes an outer furnace body assembly, a centrifugal furnace assembly and a counter-flow assembly. The inner side of the bottom of the outer furnace body assembly is provided with a flue gas duct, and the top outer end of the flue gas duct is provided with a rotating tube. The centrifugal furnace assembly is placed inside the outer furnace body assembly. The water inlet pipe of the present invention is connected to an external water source, and a water curtain is sprayed into the furnace through a spray head when the centrifugal furnace body rotates. The water curtain is cooled by contact with the high-temperature flue gas and adsorbs dust particles. Under the action of centrifugal force, the dust-containing water body is thrown to the outer wall, and dust removal is completed simultaneously. Since the rotary kiln flue gas denitrification adopts an ammonia water method with titanium dioxide as a catalyst, high temperature easily causes the catalyst to sinter, and dust will reduce the catalytic efficiency. This design uses centrifugal rotation and spraying to simultaneously expand the water-gas contact area in a single process, enhance the cooling and dust removal effect, and thus improve the denitrification efficiency and equipment operation stability.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kiln flue gas treatment, in particular to a rotary kiln flue gas denitrification device. Background Art

[0002] With the rapid development of industrial production, rotary kilns, as important high-temperature calcining equipment, are facing increasing attention for nitrogen oxide pollution in their flue gas emissions. Selective catalytic reduction technology is currently a widely used flue gas denitrification method. It uses a reducing agent (such as ammonia water) under the action of a catalyst to convert nitrogen oxides into harmless nitrogen and water. However, in the actual treatment of rotary kiln flue gas, existing technologies still face the following challenges:

[0003] Damage to catalysts caused by high temperatures: The flue gas discharged from the rotary kiln is usually at a high temperature (reaching over 300°C), and the titanium dioxide (TiO2)-based catalysts commonly used in selective catalytic reduction technology are prone to sintering and deactivation at high temperatures, resulting in a significant decrease in catalytic efficiency.

[0004] Interference of dust on catalytic reaction: Dust particles carried in the flue gas tend to adhere to the surface of the catalyst, forming a covering layer, which hinders the effective contact between the reducing agent and nitrogen oxides and reduces the denitrification efficiency.

[0005] System integration and operating cost issues: Traditional denitrification processes usually require flue gas cooling, dust removal and denitrification treatment in steps. The equipment structure is complex and occupies a large area. In addition, the single utilization rate of ammonia water is low and requires frequent replenishment, which increases operating costs.

[0006] Inconvenient cleaning and maintenance: The cleaning process of the ammonia circulation system and dust removal components in the existing device is cumbersome, and the downtime for maintenance is long, affecting production continuity. Summary of the Invention

[0007] The object of the present invention is to provide a rotary kiln flue gas denitrification device to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rotary kiln flue gas denitrification device, comprising an outer furnace body assembly, a centrifugal furnace assembly and a counter-pass assembly, a flue gas duct is provided on the inner side of the bottom of the outer furnace body assembly, and a rotating tube is provided at the top outer end of the flue gas duct, a centrifugal furnace assembly is arranged inside the outer furnace body assembly, and a counter-pass assembly is arranged at the inner top end of the centrifugal furnace assembly, the counter-pass assembly comprises a counter-pass pipe, the outer end of the counter-pass pipe is connected to a water inlet pipe, and a check valve is arranged at the outer end of the water inlet pipe, a spray head is arranged at the end of the water inlet pipe, an air inlet groove is provided at the bottom outer end of the counter-pass pipe, and a water baffle is arranged at the top outer end of the counter-pass pipe, an exhaust groove is provided on the inner side of the top of the counter-pass pipe, the top outer end of the water inlet pipe is connected to a return pipe, and the denitrification furnace assembly is arranged at the top outer end of the outer furnace body assembly.

[0009] Furthermore, the outer furnace body assembly includes an outer furnace body, a rotating track is provided inside the outer furnace body, and a partition is placed on the inner side of the bottom of the outer furnace body, a waste discharge trough is opened on the inner side of the bottom of the outer furnace body, a sewage storage cavity is opened on the bottom edge of the outer furnace body, and a sewage pipe is connected to the outside of the outer furnace body, a motor is placed inside the outer furnace body, and the output end of the motor is connected to a driving gear.

[0010] Furthermore, the waste discharge trough is communicated with the sewage storage chamber, and the sewage storage chamber is communicated with the sewage discharge pipe.

[0011] Furthermore, the centrifugal furnace assembly includes a centrifugal furnace body, a sewage trough is provided at the bottom outer end of the centrifugal furnace body, a driven gear ring is provided at the top outer end of the centrifugal furnace body, a positioning ring is provided at the outer end of the centrifugal furnace body, and a water retaining baffle is arranged inside the centrifugal furnace body.

[0012] Furthermore, the driving gear is meshed with the driven gear ring, and the flue gas pipe is connected to the centrifugal furnace body through the rotating pipe.

[0013] Furthermore, the positioning ring is fixedly connected to the centrifugal furnace body, and the positioning ring is placed inside the rotating track.

[0014] Furthermore, the through-tube is sleeve-connected to the centrifugal furnace body, and the centrifugal furnace body is communicated with the through-tube through the air inlet groove.

[0015] Furthermore, the denitrification furnace assembly includes a denitrification furnace body, a spray seat is provided inside the denitrification furnace body, and the outer end of the spray seat is connected to a liquid inlet pipe, a support seat is provided between the liquid inlet pipe and the outer furnace body, and a reflux groove is provided on the inner side of the bottom of the denitrification furnace body, a reflux chamber is provided at the outer end of the bottom of the denitrification furnace body, and an air outlet pipe is connected to the outer end of the top of the denitrification furnace body.

[0016] Furthermore, the through-pipe is connected to the denitration furnace body through the exhaust groove, and the denitration furnace body is connected to the reflux chamber through the reflux groove.

[0017] Furthermore, the reflux chamber is connected to the return pipe, and the return pipe is connected to the water inlet pipe.

[0018] The present invention provides a rotary kiln flue gas denitrification device, which has the following beneficial effects:

[0019] 1. The water inlet pipe of the present invention is connected to an external water source. When the centrifugal furnace body rotates, a water curtain is sprayed into the furnace through the spray head. The water curtain cools down the high-temperature flue gas by contacting with the high-temperature flue gas and absorbs dust particles. Under the action of centrifugal force, the dust-laden water body is thrown to the outer wall, and dust removal is completed simultaneously. Since the rotary kiln flue gas denitrification adopts the ammonia water method with titanium dioxide as the catalyst, the high temperature can easily cause the catalyst to sinter, and the dust will reduce the catalytic efficiency. This design uses centrifugal rotation and spraying to simultaneously expand the water-gas contact area in a single process, enhance the cooling and dust removal effect, and thus improve the denitrification efficiency and equipment operation stability.

[0020] 2. The liquid inlet pipe of the present invention transports ammonia water containing titanium dioxide, which is sprayed into the denitrification furnace body through the spray seat and mixed with the flue gas to achieve denitrification. The treated flue gas is discharged from the exhaust pipe, and the reacted ammonia water flows along the inner wall of the furnace body into the bottom reflux groove, merges into the reflux chamber for temporary storage, and is connected to the water inlet pipe through a return pipe with a check valve. This design allows the spray water in the cooling and dust removal stage to be mixed with ammonia water to achieve pre-denitrification, thereby improving the overall denitrification efficiency. At the same time, the recycling of ammonia water reduces consumption and reduces operating costs.

[0021] 3. The water after the reaction in the centrifugal furnace of the present invention flows into the bottom sewage trough under the action of centrifugal force and gravity, and enters the outer furnace body. The partition limits the direction of water flow and prevents splashing, guiding the sewage into the sewage storage cavity through the waste discharge trough and discharged from the sewage pipe to ensure that the flue gas circulation is not disturbed. At the same time, the ammonia water in the denitrification furnace body flows back to the centrifugal furnace body through the return pipe for recycling. When cleaning, only clean water needs to be injected into the liquid inlet pipe to achieve flushing of the entire equipment, which significantly improves the cleaning efficiency and operation convenience of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Figure A is a schematic diagram of the overall structure of a rotary kiln flue gas denitrification device of the present invention;

[0023] Figure 2 FIG. B is a schematic diagram of the overall structure of a rotary kiln flue gas denitrification device of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the outer furnace body of a rotary kiln flue gas denitration device of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of a centrifugal furnace body of a rotary kiln flue gas denitration device according to the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of a denitrification furnace body of a rotary kiln flue gas denitrification device according to the present invention;

[0027] Figure 6 This is a schematic diagram of the overall cross-sectional structure of a rotary kiln flue gas denitrification device of the present invention;

[0028] Figure 7The present invention is a schematic diagram of the cross-sectional structure of a rotary kiln flue gas denitrification device.

[0029] Figure: 1, outer furnace body assembly; 101, outer furnace body; 102, rotating track; 103, partition; 104, waste discharge chute; 105, sewage storage chamber; 106, sewage pipe; 107, motor; 108, driving gear; 2, flue gas duct; 3, rotating pipe; 4, centrifugal furnace assembly; 401, centrifugal furnace body; 402, sewage chute; 403, driven gear ring; 404, positioning ring; 405, water retaining baffle Plate; 5. Forward assembly; 501. Forward pipe; 502. Water inlet pipe; 503. Check valve; 504. Sprinkler head; 505. Air inlet groove; 506. Water baffle; 507. Exhaust groove; 508. Return pipe; 6. Denitrification furnace assembly; 601. Denitrification furnace body; 602. Spray seat; 603. Liquid inlet pipe; 604. Support seat; 605. Reflux groove; 606. Reflux chamber; 607. Outlet pipe. DETAILED DESCRIPTION

[0030] See also Figures 1 to 7 The present invention provides a technical solution: a rotary kiln flue gas denitrification device, comprising an outer furnace body component 1, a centrifugal furnace component 4 and a through component 5, the outer furnace body component 1 comprises an outer furnace body 101, a rotating track 102 is provided inside the outer furnace body 101, and a partition 103 is arranged on the inner side of the bottom of the outer furnace body 101, a waste discharge trough 104 is provided on the inner side of the bottom of the outer furnace body 101, a sewage storage cavity 105 is provided on the bottom edge of the outer furnace body 101, and a sewage pipe 106 is connected to the outside of the outer furnace body 101, a motor 107 is arranged inside the outer furnace body 101, and the output end of the motor 107 is connected to a driving gear 108, the waste discharge trough 104 is connected to the sewage storage cavity 105, and the sewage storage cavity 105 is connected to the sewage pipe 106, the outer furnace body component A flue gas duct 2 is provided on the inner side of the bottom of the component 1, and a rotating tube 3 is provided at the top outer end of the flue gas duct 2. A centrifugal furnace assembly 4 is arranged inside the outer furnace body assembly 1. The centrifugal furnace assembly 4 includes a centrifugal furnace body 401. A sewage trough 402 is provided at the bottom outer end of the centrifugal furnace body 401, and a driven gear ring 403 is provided at the top outer end of the centrifugal furnace body 401. A positioning ring 404 is provided at the outer end of the centrifugal furnace body 401, and a water retaining baffle 405 is arranged inside the centrifugal furnace body 401. The driving gear 108 is meshed with the driven gear ring 403. The flue gas duct 2 is connected to the centrifugal furnace body 401 through the rotating tube 3. The positioning ring 404 is fixedly connected to the centrifugal furnace body 401, and the positioning ring 404 is arranged inside the rotating track 102.

[0031] The specific operation is as follows: the flue gas duct 2 can be connected to the rotary kiln, so that the flue gas during the operation of the rotary kiln can enter the inside of the flue gas duct 2, and the flue gas duct 2 is connected to the inside of the centrifugal furnace body 401 through the rotating tube 3, so that the flue gas can enter the inside of the centrifugal furnace body 401. After the flue gas enters the inside of the centrifugal furnace body 401, the motor 107 drives the driving gear 108 to rotate, and the driving gear 108 can drive the centrifugal furnace body 401 to rotate by engaging with the driven gear ring 403. The positioning ring 404 at the outer end of the centrifugal furnace body 401 is placed in the rotating track 102 inside the outer furnace body 101, which can effectively ensure the rotation stability of the centrifugal furnace body 401.

[0032] See also Figures 1 to 7 The top of the inner side of the centrifugal furnace assembly 4 is provided with a through assembly 5, which includes a through pipe 501, the outer end of the through pipe 501 is connected to a water inlet pipe 502, and a check valve 503 is provided at the outer end of the water inlet pipe 502, and a spray head 504 is provided at the end of the water inlet pipe 502, an air inlet groove 505 is provided at the bottom outer end of the through pipe 501, and a water baffle 506 is provided at the top outer end of the through pipe 501, an exhaust groove 507 is provided on the inside of the top of the through pipe 501, and the top outer end of the water inlet pipe 502 is connected to a return pipe 508, the through pipe 501 is sleeved and connected to the centrifugal furnace body 401, and the centrifugal furnace body 401 is communicated with the through pipe 501 through the air inlet groove 505.

[0033] The specific operation is as follows: the water inlet pipe 502 can be connected to the water source outside the equipment. During the rotation of the centrifugal furnace body 401, the external water source can be passed into the inside of the spray head 504 through the water inlet pipe 502. The spray head 504 is arranged inside the centrifugal furnace body 401, which enables the water curtain sprayed by the spray head 504 to contact the flue gas. After the water curtain contacts the flue gas, it can cool the flue gas. At the same time, the water curtain can contact the suspended particles (dust) in the flue gas, and through the centrifugal effect of the centrifugal furnace body 401, the water body carrying dust will move closer to the outer wall of the centrifugal furnace body 401. Through the above operation, the flue gas can be effectively cooled and dust removed. Because the denitrification of rotary kiln flue gas usually adopts ammonia water mixed with titanium dioxide as a catalyst for denitrification, if the flue gas temperature is too high, it will lead to The sintering of titanium dioxide and the excessive amount of dust will affect the catalytic effect of the catalyst. By cooling and removing dust from the flue gas before denitrification, the denitrification effect of the flue gas can be effectively improved. The centrifugal furnace body 401 is centrifugally combined with spraying to enable the equipment to achieve flue gas cooling and dust removal in a single step. The centrifugal force and rotation effect generated by the centrifuge can increase the contact range between the water body and the flue gas, thereby enhancing the cooling and dust removal effects of the flue gas, which improves the stability of the equipment. The water-retaining baffle 405 inside the centrifugal furnace body 401 can block the flue gas duct 2, which can prevent water from entering the flue gas duct 2, and the design of the increased height at the connection between the centrifugal furnace body 401 and the rotating tube 3 can also effectively prevent water from flowing into the flue gas duct 2.

[0034] See also Figures 1 to 7 , a denitration furnace assembly 6 is placed at the top outer end of the outer furnace body assembly 1, and the denitration furnace assembly 6 includes a denitration furnace body 601, a spray seat 602 is provided inside the denitration furnace body 601, and the outer end of the spray seat 602 is connected with a liquid inlet pipe 603, a support seat 604 is provided between the liquid inlet pipe 603 and the outer furnace body 101, and a reflux groove 605 is provided on the inner side of the bottom of the denitration furnace body 601, a reflux cavity 606 is provided at the bottom outer end of the denitration furnace body 601, and an air outlet pipe 607 is connected to the top outer end of the denitration furnace body 601, the through pipe 501 is communicated with the denitration furnace body 601 through the exhaust groove 507, and the denitration furnace body 601 is connected to the reflux cavity 606 through the reflux groove 605, the reflux cavity 606 is connected to the return water pipe 508, and the return water pipe 508 is connected to the water inlet pipe 502;

[0035] The specific operation is as follows: the flue gas after cooling can enter the inside of the through pipe 501 through the air inlet groove 505, and enter the inside of the denitrification furnace body 601 through the exhaust groove 507. The liquid inlet pipe 603 can be connected to the ammonia water mixed with titanium dioxide, and the ammonia water is sprayed through the spray seat 602. The spray port of the spray seat 602 is set inside the denitrification furnace body 601, which allows the ammonia water to mix with the flue gas entering the denitrification furnace body 601, thereby achieving denitrification of the flue gas. The use of the water baffle 506 can prevent the ammonia water from entering the through pipe 501 through the exhaust groove 507, thereby completing the denitrification. The flue gas can flow out through the exhaust pipe 607 and enter the next treatment step, and the ammonia water after reacting with the flue gas will flow downward along the inner wall of the denitrification furnace body 601. A reflux groove 605 is provided on the inner side of the bottom of the denitrification furnace body 601, which allows the ammonia water to pass through the reflux groove 605 and enter the reflux chamber 606 for storage. The reflux chamber 606 is connected to the water inlet pipe 502 through the return pipe 508, and the check valve 503 at the outer end of the return pipe 508 can effectively prevent the ammonia water from flowing back. Through this design, the flue gas can be cooled and dust-removed in the centrifugal furnace body 401 through the water mixed with ammonia water. The preliminary denitrification is carried out, which can improve the denitrification effect of the equipment. In addition, the design can make the ammonia water fully react, which can reduce the overall use of ammonia water, thereby reducing the denitrification cost of the equipment. The water body that completes the reaction and cooling in the centrifugal furnace body 401 will flow into the bottom of the centrifugal furnace body 401 with the centrifugal action and gravity. A sewage trough 402 is provided at the bottom of the centrifugal furnace body 401, which allows the water body to enter the interior of the outer furnace body 101 through the sewage trough 402. A partition 103 is provided on the inner side of the bottom of the outer furnace body 101. The barrier of the partition 103 can prevent the water body from splashing everywhere, and this can also make The water enters the sewage storage chamber 105 through the waste discharge trough 104 and is stored. By opening the sewage discharge pipe 106, the sewage stored in the sewage storage chamber 105 can flow out from the sewage discharge pipe 106. This allows the sewage generated by the equipment during the reaction and cooling process to be conveniently discharged without affecting the normal circulation of the flue gas. In addition, because the ammonia water in the denitrification process of the denitrification furnace body 601 is returned to the inside of the centrifugal furnace body 401 through the return pipe 508, during the cleaning process of the equipment, it is only necessary to input clean water into the liquid inlet pipe 603 to achieve cleaning of the entire equipment, which can greatly improve the cleaning convenience of the equipment.

[0036] In summary, when the rotary kiln flue gas denitrification device is used, first, the flue gas duct 2 can be connected with the rotary kiln, so that the flue gas in the working process of the rotary kiln can enter the inside of the flue gas duct 2, and the flue gas duct 2 is connected with the inside of the centrifugal furnace body 401 through the rotating tube 3, so that the flue gas can enter the inside of the centrifugal furnace body 401. After the flue gas enters the inside of the centrifugal furnace body 401, the motor 107 drives the driving gear 108 to rotate, and the driving gear 108 can drive the centrifugal furnace body 401 to rotate by engaging with the driven gear ring 403. The positioning ring 404 at the outer end of the centrifugal furnace body 401 is placed in the rotating track 102 inside the outer furnace body 101, which can effectively ensure the rotation stability of the centrifugal furnace body 401.

[0037] Then the water inlet pipe 502 can be connected to the water source outside the equipment. During the rotation of the centrifugal furnace body 401, the external water source can be passed into the inside of the spray head 504 through the water inlet pipe 502. The spray head 504 is placed inside the centrifugal furnace body 401, which allows the water curtain sprayed by the spray head 504 to contact the flue gas. After the water curtain contacts the flue gas, it can cool the flue gas. At the same time, the water curtain can contact the suspended particles (dust) in the flue gas, and through the centrifugal effect of the centrifugal furnace body 401, the water body carrying the dust will move closer to the outer wall of the centrifugal furnace body 401. Through the above operations, the flue gas can be effectively cooled and dust removed. Because the denitrification of rotary kiln flue gas usually uses ammonia water mixed with titanium dioxide as a catalyst for denitrification, if the flue gas temperature is too high, it will cause titanium dioxide to accumulate. Titanium sintering, excessive dust will affect the catalytic effect of the catalyst. By cooling and removing dust from the flue gas before denitrification, the denitrification effect of the flue gas can be effectively improved. The centrifugal furnace body 401 is centrifugally combined with spraying to enable the equipment to achieve flue gas cooling and dust removal in a single step. The centrifugal force and rotation effect generated by the centrifugal force can increase the contact range between the water body and the flue gas, thereby enhancing the cooling and dust removal effects of the flue gas, which improves the stability of the equipment. The water-retaining baffle 405 inside the centrifugal furnace body 401 can block the flue gas duct 2, which can prevent water from entering the flue gas duct 2. The design of the increased height at the connection between the centrifugal furnace body 401 and the rotating tube 3 can also effectively prevent water from flowing into the flue gas duct 2.

[0038] Then the flue gas after cooling can enter the inside of the through pipe 501 through the air inlet groove 505, and enter the inside of the denitrification furnace body 601 through the exhaust groove 507. The liquid inlet pipe 603 can be connected to the ammonia water mixed with titanium dioxide, and the ammonia water is sprayed through the spray seat 602. The spray port of the spray seat 602 is set inside the denitrification furnace body 601, which allows the ammonia water to mix with the flue gas entering the denitrification furnace body 601, thereby realizing the denitrification of the flue gas. The use of the water baffle 506 can prevent the ammonia water from entering the through pipe 501 through the exhaust groove 507, and the flue gas that has completed denitrification can flow out through the exhaust pipe 607 and enter the next treatment step. Ammonia water will flow downward along the inner wall of the denitrification furnace body 601. A reflux groove 605 is provided on the inner side of the bottom of the denitrification furnace body 601, which allows the ammonia water to enter the reflux chamber 606 for storage through the reflux groove 605. The reflux chamber 606 is connected to the water inlet pipe 502 through the return pipe 508, and the check valve 503 at the outer end of the return pipe 508 can effectively prevent the backflow of ammonia water. Through this design, when the flue gas is cooled and dust-removed in the centrifugal furnace body 401, it can be preliminarily denitrated by the water mixed with ammonia water, which can improve the denitrification effect of the equipment. In addition, this design can make the ammonia water fully react, which can reduce the overall usage of ammonia water, thereby reducing the denitrification cost of the equipment.

[0039] Finally, the water that has completed the reaction and cooling in the centrifugal furnace body 401 will flow into the bottom of the centrifugal furnace body 401 with the centrifugal action and gravity. A sewage trough 402 is provided at the bottom of the centrifugal furnace body 401, which allows the water to enter the outer furnace body 101 through the sewage trough 402. A partition 103 is provided on the inner side of the bottom of the outer furnace body 101. The barrier of the partition 103 can prevent the water from splashing around. At the same time, it can also allow the water to enter the sewage storage chamber 105 through the sewage trough 104 for storage. By opening the sewage discharge, the sewage can be discharged to the sewage storage chamber 105. Pipe 106, the sewage stored in the sewage storage chamber 105 can flow out from the sewage pipe 106, which makes it possible to conveniently discharge the sewage generated by the equipment during the reaction and cooling process without affecting the normal circulation of the flue gas. In addition, since the ammonia water in the denitrification process of the denitrification furnace body 601 is returned to the inside of the centrifugal furnace body 401 through the return pipe 508, during the cleaning process of the equipment, it is only necessary to input clean water into the liquid inlet pipe 603 to achieve the cleaning of the entire equipment, which can greatly improve the cleaning convenience of the equipment.

[0040] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0041] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A rotary kiln flue gas denitrification device, characterized in that: The invention comprises an outer furnace body component (1), a centrifugal furnace component (4) and a through-hole component (5), wherein a flue gas duct (2) is provided on the inner side of the bottom of the outer furnace body component (1), and a rotating tube (3) is provided on the outer end of the top of the flue gas duct (2), a centrifugal furnace component (4) is arranged inside the outer furnace body component (1), and a through-hole component (5) is arranged on the inner top end of the centrifugal furnace component (4), the through-hole component (5) comprises a through-hole (501), the outer end of the through-hole (501) is connected to a water inlet pipe (502), and a check valve (503) is arranged on the outer end of the water inlet pipe (502), the water inlet pipe ( 502) is provided with a spray head (504), an air inlet groove (505) is provided at the bottom outer end of the through pipe (501), and a water baffle (506) is provided at the top outer end of the through pipe (501), an exhaust groove (507) is provided on the inner side of the top of the through pipe (501), the top outer end of the water inlet pipe (502) is connected to a return water pipe (508), a denitrification furnace assembly (6) is provided at the top outer end of the outer furnace body assembly (1), the centrifugal furnace assembly (4) includes a centrifugal furnace body (401), and a sewage discharge groove (402) is provided at the bottom outer end of the centrifugal furnace body (401). The top outer end of the centrifugal furnace body (401) is provided with a driven gear ring (403), the interior of the centrifugal furnace body (401) is provided with a water baffle (405), the flue gas passage (2) is connected to the centrifugal furnace body (401) through the rotating tube (3), the through-tube (501) is sleeve-connected to the centrifugal furnace body (401), and the centrifugal furnace body (401) is connected to the through-tube (501) through the air inlet groove (505), the denitrification furnace assembly (6) includes a denitrification furnace body (601), the interior of the denitrification furnace body (601) is provided with a spray seat (602), and the outer end of the spray seat (602) is connected to the centrifugal furnace body (401). A liquid inlet pipe (603) is connected, a reflux groove (605) is provided on the inner side of the bottom of the denitration furnace body (601), a reflux chamber (606) is provided at the outer end of the bottom of the denitration furnace body (601), and an air outlet pipe (607) is connected to the outer end of the top of the denitration furnace body (601), the through pipe (501) is communicated with the denitration furnace body (601) through the air outlet groove (507), and the denitration furnace body (601) is communicated with the reflux chamber (606) through the reflux groove (605), the reflux chamber (606) is communicated with the return water pipe (508), and the return water pipe (508) is connected with the water inlet pipe (502).

2. A rotary kiln flue gas denitrification device according to claim 1, characterized in that: The outer furnace body assembly (1) comprises an outer furnace body (101), a rotating track (102) is provided inside the outer furnace body (101), a partition (103) is arranged on the inner side of the bottom of the outer furnace body (101), a waste discharge groove (104) is provided on the inner side of the bottom of the outer furnace body (101), a sewage storage cavity (105) is provided on the bottom edge of the outer furnace body (101), and a sewage discharge pipe (106) is connected to the outside of the outer furnace body (101), a motor (107) is arranged inside the outer furnace body (101), and an output end of the motor (107) is connected to a driving gear (108).

3. A rotary kiln flue gas denitrification device according to claim 2, characterized in that: The waste discharge trough (104) is connected to the sewage storage chamber (105), and the sewage storage chamber (105) is connected to the sewage discharge pipe (106).

4. A rotary kiln flue gas denitrification device according to claim 1, characterized in that: A positioning ring (404) is provided at the outer end of the centrifugal furnace body (401).

5. The rotary kiln flue gas denitrification device according to claim 2, characterized in that: The driving gear (108) is meshed with the driven gear ring (403).

6. A rotary kiln flue gas denitrification device according to claim 4, characterized in that: The positioning ring (404) is fixedly connected to the centrifugal furnace body (401), and the positioning ring (404) is placed inside the rotating track (102).

7. The rotary kiln flue gas denitrification device according to claim 2, characterized in that: A support base (604) is provided between the liquid inlet pipe (603) and the outer furnace body (101).

Images