CN217511578U

CN217511578U - SCR denitration device adopting high-temperature and high-dust

Info

Publication number: CN217511578U
Application number: CN202220666346.5U
Authority: CN
Inventors: 熊召平; 龙大彪; 杨宏; 朱修建; 王群
Original assignee: Shimen Conch Cement Co ltd
Current assignee: Shimen Conch Cement Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-09-30
Anticipated expiration: 2032-03-25

Abstract

The utility model relates to a SCR denitration technology field especially relates to an adopt SCR denitrification facility of high temperature high dirt. The technical scheme includes that the denitration device comprises a denitration tower, a cyclone and a base, the denitration tower is installed at the middle position of the upper surface of the base, a honeycomb catalytic plate is installed inside the denitration tower, a rake type ash remover is installed inside the denitration tower, the cyclone is installed on one side of the upper surface of the base, an air inlet pipe is installed at the position, close to the upper surface, of the outer side of the cyclone, a mixing pipe is installed on the upper surface of the cyclone through a connecting pipe, an atomized ammonia water pipe is installed on the upper surface of the mixing pipe, and a bent pipe is installed at the tail end of the mixing pipe. The utility model discloses can get rid of most dust in the high-dust flue gas in advance to guarantee the catalytic efficiency of SCR denitration tower inside catalyst, guarantee denitration efficiency then, reduce the wearing and tearing of SCR denitration tower and flue gas pipeline simultaneously, thereby prolong the life of SCR denitration tower and flue gas pipeline.

Description

SCR denitration device adopting high-temperature and high-dust

Technical Field

The utility model relates to a SCR denitration technology field specifically is an adopt SCR denitrification facility of high temperature high dust.

Background

The importance of the process of removing nitrogen oxides from combustion fumes to prevent environmental pollution has been pointed out as a worldwide problem. The mainstream process in the world comprises the following steps: SCR and SNCR. These two processes are not very different except that the reaction temperature is lower than SNCR due to the use of catalyst for SCR, but the SCR investment is at least several times, even more than 10 times, the SNCR investment if both from the point of view of construction costs and operating costs.

Through a mass search, it is found that a typical SCR denitration device in the prior art, such as a cement kiln high-temperature high-dust SCR denitration device disclosed in the publication No. CN110787629B, when an ammonia conveying pipe extends into a seam of two rubber rings, the rubber rings can coat the surface of the ammonia conveying pipe, the moving process of the ammonia conveying pipe is not influenced, the air tightness of a reaction container body can be ensured to the greatest extent, ammonia is prevented from overflowing from the reaction container body or the ammonia overflowing from the reaction container body is reduced, and the practicability is higher.

The dust in the high dirt flue gas is more, and a large amount of dusts can adhere to the surface of catalyst in directly entering into SCR denitration tower along with the flue gas to reduce the catalytic efficiency of catalyst, then reduce denitration efficiency, a large amount of dusts also can lead to SCR denitration tower and flue gas pipeline wearing and tearing seriously simultaneously, for this reason, we propose an SCR denitrification facility who adopts high temperature high dirt.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an adopt SCR denitrification facility of high temperature high dirt, it can get rid of most dust in the high dirt flue gas in advance to possess, thereby guarantee the catalytic efficiency of SCR denitration tower internal catalyst, then guarantee denitration efficiency, reduce the wearing and tearing of SCR denitration tower and flue gas pipeline simultaneously, thereby prolong the life's of SCR denitration tower and flue gas pipeline advantage, it is more to have solved the dust in the high dirt flue gas, and a large amount of dust can adhere to the surface of catalyst in directly entering into the SCR denitration tower along with the flue gas, thereby reduce the catalytic efficiency of catalyst, then reduce denitration efficiency, a large amount of dust also can lead to the serious problem of SCR denitration tower and flue gas pipeline wearing and tearing simultaneously.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an adopt SCR denitrification facility of high temperature high dust, includes denitration tower, whirlwind section of thick bamboo and base, base upper surface intermediate position department installs the denitration tower, denitration tower internally mounted has honeycomb catalysis board, denitration tower internally mounted has harrow formula deashing ware, a whirlwind section of thick bamboo is installed to base upper surface one side, the whirlwind section of thick bamboo outside is close to upper surface position department and installs the intake pipe, the mixing tube is installed through the connecting pipe to whirlwind section of thick bamboo upper surface, surface mounting has atomizing ammonia pipe on the mixing tube, the return bend is installed to the mixing tube end, and the terminal and the denitration tower upper surface connection of return bend, denitration tower outer surface is close to below position department and installs the outlet duct.

Preferably, the honeycomb catalysis board is equipped with threely altogether, and is three the honeycomb catalysis board equidistance is installed inside the denitration tower, and three honeycomb catalysis board plays catalytic effect to the reaction of flue gas and atomizing aqueous ammonia.

Preferably, the number of the rake-type ash removers is three, the three rake-type ash removers are equidistantly arranged in the denitration tower, and dust adhered to the surfaces of the three honeycomb catalyst plates is removed through the three rake-type ash removers.

Preferably, a waste heat power generation boiler is installed on one side, away from the cyclone cylinder, of the upper surface of the base, the tail end of the air outlet pipe is connected with the input end of the waste heat power generation boiler, denitration flue gas is discharged into the waste heat power generation boiler to be used for power generation, and energy conservation is facilitated.

Preferably, the lower surfaces of the denitration tower and the cyclone cylinder are respectively provided with a dust exhaust valve, and dust collected in the denitration tower and the cyclone cylinder is exhausted through the two exhaust valves.

Preferably, the top axle center position department of cyclone inner wall installs the fixed tube, fixed tube surface mounting has helical blade, fixed tube surface mounting has a filter screen section of thick bamboo, the cyclone surface is close to lower surface position department and installs shock dynamo, and high dirt flue gas enters into cyclone inside and becomes the heliciform along helical blade through the intake pipe and flows, collides with cyclone inner wall at the in-process that high dirt flue gas flows, and the in-process dust of collision loses power and descends along helical blade, and the flue gas of removing partly dust passes a filter screen section of thick bamboo and gets rid of the tiny dust wherein once more.

Preferably, the pivot is installed through the mounting bracket to the mixing tube inner wall, the impeller is installed to the pivot end, pivot surface mounting has mixing blade, and the inside mobile mist of mixing tube drives impeller rotation, and the impeller drives mixing blade through the pivot and rotates the more even that makes flue gas and atomizing aqueous ammonia mix to be favorable to atomizing aqueous ammonia and the abundant reaction of flue gas.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the cyclone cylinder is arranged, so that most of dust in the high-dust flue gas can be removed in advance, thereby ensuring the catalytic efficiency of the catalyst in the SCR denitration tower, further ensuring the denitration efficiency, reducing the abrasion of the SCR denitration tower and the flue gas pipeline, thereby prolonging the service life of the SCR denitration tower and the flue gas pipeline, leading the high-dust flue gas to enter the cyclone cylinder through the air inlet pipe and flow spirally along the helical blades, collide with the inner wall of the cyclone cylinder in the flowing process of the high-dust flue gas, the dust loses power and falls along the helical blade in the collision process, and the flue gas with a part of dust removed passes through the filter screen cylinder, fine dust in the flue gas is removed again, then the flue gas is discharged into the mixing pipe through the fixed pipe, the flue gas is mixed with atomized ammonia water and then enters the denitration tower, and nitrogen oxide is removed after the mixed gas of the flue gas and the ammonia water is subjected to catalytic reaction by the honeycomb catalytic plate.

2. The utility model discloses a set up the hybrid tube, reached and to have improved the mixed degree of consistency of atomizing aqueous ammonia and flue gas to make atomizing aqueous ammonia and flue gas reaction abundant, improve the effect of denitration efficiency then, after flue gas and the atomizing aqueous ammonia that get rid of some dust enter into the hybrid tube inside, the mixed gas stream that flows drives impeller rotation, and the impeller drives mixing vane through the pivot and rotates the more even that makes flue gas and atomizing aqueous ammonia mix, thereby be favorable to atomizing aqueous ammonia and flue gas fully reaction.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

FIG. 2 is a schematic view of the structure of the denitration tower;

FIG. 3 is a schematic view of the inner structure of the mixing tube according to the present invention;

FIG. 4 is a schematic view of the interior of the cyclone according to the present invention.

Reference numerals: 1. a denitration tower; 2. bending the pipe; 3. a mixing tube; 4. an atomized ammonia water pipe; 5. a connecting pipe; 6. a cyclone; 7. an air inlet pipe; 8. a dust exhaust valve; 9. a base; 10. a waste heat power generation boiler; 11. an air outlet pipe; 12. a rake type ash remover; 13. a honeycomb catalyst plate; 14. an impeller; 15. a mounting frame; 16. a rotating shaft; 17. a mixing blade; 18. a fixed tube; 19. a helical blade; 20. a screen cylinder; 21. a vibration motor.

Detailed Description

The following describes the technical solution of the present invention with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 4, the SCR denitration device using high temperature and high dust provided by the present invention comprises a denitration tower 1, a cyclone 6 and a base 9, wherein the denitration tower 1 is installed at the middle position of the upper surface of the base 9, dust exhaust valves 8 are installed on the lower surfaces of the denitration tower 1 and the cyclone 6, three honeycomb catalytic plates 13 are installed inside the denitration tower 1, three rake type ash removers 12 are installed inside the denitration tower 1, the cyclone 6 is installed on one side of the upper surface of the base 9, a fixed pipe 18 is installed at the top axial center position of the inner wall of the cyclone 6, helical blades 19 are installed on the outer surface of the fixed pipe 18, a filter screen cylinder 20 is installed on the lower surface of the fixed pipe 18, a vibration motor 21 is installed on the outer surface of the cyclone 6 near the lower surface, vibrating motor 21's being provided with does benefit to the discharge of the inside dust of cyclone 6, the cyclone 6 outside is close to upper surface position department and installs intake pipe 7, mixing tube 3 is installed through connecting pipe 5 to cyclone 6 upper surface, 3 inner walls of mixing tube install pivot 16 through

mounting bracket

15, 16 end-to-end impeller 14 of pivot are installed, 16 outer surface mounting in pivot has mixing

blade

17, 3 upper surface mounting of mixing tube has atomizing

ammonia water pipe

4, 3 end-to-end return bend 2 of mixing tube, and 2 end-to-end return bends and 1 upper surface connection in denitration tower, 1 surface of denitration tower is close to below position department and installs outlet duct 11, base 9 upper surface deviates from one side of cyclone 6 and installs exhaust-heat power boiler 10, and outlet duct 11 end and exhaust-heat power boiler 10 input are connected.

The working principle is as follows: the high dust flue gas enters the cyclone 6 through the air inlet pipe 7 and flows in a spiral shape along the spiral blade 19, collides with the inner wall of the cyclone 6 in the flowing process of the high-dust flue gas, the dust loses power and falls along the helical blade 19 in the collision process, the flue gas with a part of dust removed passes through the filter screen cylinder 20, fine dust in the flue gas is removed again, and then the flue gas is discharged into the mixing pipe 3 through the fixed pipe 18, ammonia water enters into the mixing pipe 3 through the atomized ammonia water pipe 4, and the mixed gas flow that flows in mixing tube 3 drives impeller 14 and rotates, and impeller 14 drives mixing vane 17 through pivot 16 and rotates the more even that makes flue gas and aqueous ammonia mix, and the mist of flue gas and aqueous ammonia gets into inside the denitration tower 1 and gets rid of nitrogen oxide behind the honeycomb catalytic board 13 catalytic reaction, and the flue gas after getting rid of nitrogen oxide enters into waste heat power generation boiler 10 and generates electricity.

The above embodiments are merely some preferred embodiments of the present invention, and those skilled in the art can make various alternative modifications and combinations to the above embodiments based on the technical solution of the present invention and the related teachings of the above embodiments.

Claims

1. The utility model provides an adopt SCR denitrification facility of high temperature high dust, includes denitration tower (1), cyclone (6) and base (9), its characterized in that: base (9) upper surface intermediate position department installs denitration tower (1), denitration tower (1) internally mounted has honeycomb catalysis board (13), denitration tower (1) internally mounted has rake deashing ware (12), cyclone (6) are installed to base (9) upper surface one side, cyclone (6) outside is close to upper surface position department and installs intake pipe (7), mixing tube (3) are installed through connecting pipe (5) to cyclone (6) upper surface, mixing tube (3) upper surface mounting has atomizing ammonia water pipe (4), return bend (2) are installed to mixing tube (3) end, and return bend (2) end and denitration tower (1) upper surface connection, denitration tower (1) surface is close to lower position department and installs outlet duct (11).

2. The SCR denitration device adopting high-temperature and high-dust as set forth in claim 1, wherein: honeycomb catalysis board (13) are equipped with threely altogether, and three honeycomb catalysis board (13) equidistance is installed inside denitration tower (1).

3. The SCR denitration device adopting high-temperature and high-dust as set forth in claim 1, wherein: the number of the rake type ash removers (12) is three, and the three rake type ash removers (12) are arranged in the denitration tower (1) at equal intervals.

4. The SCR denitration device adopting high-temperature and high-dust as set forth in claim 1, wherein: and a waste heat power generation boiler (10) is installed on one side of the upper surface of the base (9) departing from the cyclone (6), and the tail end of the air outlet pipe (11) is connected with the input end of the waste heat power generation boiler (10).

5. The SCR denitration device adopting high-temperature and high-dust as set forth in claim 1, wherein: and dust exhaust valves (8) are arranged on the lower surfaces of the denitration tower (1) and the cyclone cylinder (6).

6. The SCR denitration device adopting high-temperature and high-dust as set forth in claim 1, wherein: the cyclone comprises a cyclone body (6) and is characterized in that a fixed pipe (18) is installed at the top axis position of the inner wall of the cyclone body (6), helical blades (19) are installed on the outer surface of the fixed pipe (18), a filter screen cylinder (20) is installed on the lower surface of the fixed pipe (18), and a vibration motor (21) is installed on the outer surface of the cyclone body (6) close to the lower surface.

7. The SCR denitration device adopting high-temperature and high-dust as set forth in claim 1, characterized in that: the utility model discloses a mixing tube (3) is characterized in that pivot (16) are installed through mounting bracket (15) to mixing tube (3) inner wall, impeller (14) are installed to pivot (16) end, pivot (16) surface mounting has mixing vane (17).