Flue gas denitration equipment
By introducing a flow guide hood and a stirring mechanism into the flue gas denitrification equipment, the flue gas and ammonia are ensured to be mixed evenly, which solves the problems of poor denitrification effect and ammonia escape caused by uneven mixing, and achieves efficient denitrification and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LAIYANG YUMING ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-10
AI Technical Summary
In existing flue gas denitrification equipment, the flue gas and ammonia are not mixed evenly, resulting in an excess or deficiency of ammonia, which affects the denitrification effect, increases production costs, and causes ammonia pollution.
A flue gas denitrification device was designed, comprising a mixing tank, a flow guide hood, a stirring mechanism, and a catalytic component. The flow guide hood reduces the flue gas velocity, the stirring mechanism ensures that ammonia and flue gas are mixed evenly, and the mixture reacts with the catalyst to generate nitrogen and water vapor.
This method achieves uniform mixing of flue gas and ammonia, improves denitrification efficiency, meets environmental standards, reduces ammonia escape, and lowers production costs.
Smart Images
Figure CN224100370U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to flue gas treatment technical field, concretely is a flue gas denitration equipment. BACKGROUND
[0002] In modern industrial production, a large amount of flue gas is generated in the combustion process of many enterprises such as thermal power plants, cement plants and glass plants, and a large amount of nitrogen oxides (NOx) such as NO is usually contained in the flue gas. If these nitrogen oxides are directly discharged into the atmosphere without treatment, it will cause serious environmental problems such as acid rain, which will cause great harm to the ecological system and human life. Therefore, the flue gas must be treated by denitration before being discharged.
[0003] The selective catalytic reduction (SCR) process is one of the most widely used and mature flue gas denitration technologies. Its principle is to spray ammonia (NH3) or urea and other reducing agents into the flue gas under the action of a catalyst, so that NOx reacts with the reducing agent to generate N2 and H2O.
[0004] However, in actual application, due to the fast flow rate of flue gas emission in industrial production, the contact time between flue gas and ammonia is short. In a limited time, it is difficult to ensure that the flue gas and ammonia are fully and uniformly mixed. If they are not mixed uniformly, it will cause local excess or insufficient ammonia, and the excess part may cause ammonia escape, resulting in increased production cost, and the escaped ammonia will also cause a certain degree of pollution to the atmosphere; the insufficient part will make the nitrogen oxides unable to fully react, reducing the denitration effect. In order to ensure uniform mixing of flue gas and ammonia in the denitration process, improve the denitration effect to meet the environmental protection standard, reduce the phenomenon of ammonia escape, and reduce the production cost, we propose a flue gas denitration equipment. UTILITY MODEL CONTENTS
[0005] In view of the shortcomings of the prior art, the utility model provides a flue gas denitration equipment, which can ensure uniform mixing of flue gas and ammonia in the denitration process, improve the denitration effect to meet the environmental protection standard, reduce the phenomenon of ammonia escape, and reduce the production cost.
[0006] To achieve the above purpose, the utility model realizes the following technical scheme:
[0007] A flue gas denitration equipment, comprising a bottom plate, a mixing tank is fixedly installed on the top of the bottom plate, a flue gas pipe is fixedly communicated on the left side of the mixing tank, an ammonia gas pipe is rotatably arranged on the top of the mixing tank, a mixing assembly for uniformly mixing ammonia gas and flue gas is installed on the mixing tank, and a catalytic assembly for reacting flue gas and ammonia gas is installed on the bottom plate.
[0008] The mixing assembly comprises a flow guide cover fixedly connected to the inner wall of the mixing tank, a plurality of first through holes are formed in the inner wall of the flow guide cover, a plurality of second through holes are formed in the ammonia gas pipe, and a stirring mechanism for stirring the gas in the mixing tank is installed on the mixing tank.
[0009] Preferably, the stirring mechanism comprises a motor fixedly installed on the mixing tank, a driving wheel fixedly connected to the output end of the motor, a driven wheel fixedly sleeved outside the ammonia gas pipe, a belt tensioned and sleeved between the driving wheel and the driven wheel, a rotating plate slidingly sleeved outside the ammonia gas pipe, a plurality of installation rods fixedly connected to the bottom of the rotating plate, a plurality of connecting rings fixedly sleeved outside the installation rods, a plurality of stirring plates fixedly installed on the connecting rings, and a moving mechanism for driving the rotating plate to move up and down is installed on the mixing tank.
[0010] Preferably, the moving mechanism comprises an installation ring fixedly connected to the inner wall of the mixing tank, a plurality of lower moving blocks fixedly connected to the top of the installation ring, a plurality of upper moving blocks fixedly connected to the bottom of the rotating plate and matched with the lower moving blocks, and a slope is arranged on the upper moving block and the lower moving block.
[0011] Preferably, the catalytic assembly comprises a reaction box fixedly installed on the top of the bottom plate, a plurality of catalyst modules fixedly installed on the inner wall of the reaction box, a connecting pipe fixedly communicated with the left side of the reaction box, the other end of the connecting pipe away from the reaction box being fixedly communicated with the mixing tank, and an exhaust pipe fixedly communicated with the right side of the reaction box.
[0012] Preferably, an installation cover is fixedly connected to the top of the inner cavity of the mixing tank, a connecting cover is slidingly installed on the inner wall of the installation cover, the connecting cover is movably sleeved outside the ammonia gas pipe, the bottom of the connecting cover is abutted with the top of the rotating plate, a spring is fixedly connected to the top of the inner cavity of the mixing tank, the installation cover is sleeved outside the spring, and the bottom of the spring is fixedly connected with the connecting cover.
[0013] Preferably, a filter plate is fixedly connected to the inner wall of the flow guide cover, a connecting rod is rotatably sleeved on the filter plate, a scraper is fixedly connected to the bottom of the connecting rod, the top of the scraper is abutted with the bottom of the filter plate, the connecting rod is rotatably sleeved through the flow guide cover, and the top of the connecting rod is fixedly connected with the bottom of the ammonia gas pipe. Beneficial effects
[0014] The utility model provides a kind of flue gas denitrification equipment.Compared with prior art, it has the following beneficial effects:
[0015] The flue gas enters the mixing tank from the flue gas pipe during operation of the flue gas denitration equipment, and the flow is blocked and reduced by the flow guide cover, so that the flue gas is sprayed out through the first through hole, and the ammonia gas is sprayed out from the second through hole of the ammonia gas pipe, and the two collide with each other to realize preliminary mixing; in the stirring mechanism, the motor drives the driving wheel, and the driven wheel and the ammonia gas pipe are rotated through the belt, and then the rotating plate, the mounting rod, the connecting ring and the stirring plate are rotated to cut and stir the gas; in the moving mechanism, the rotating plate is lifted and lowered by cooperation of the inclined surfaces of the upper moving block and the lower moving block when the rotating plate rotates, so that the connecting ring is lifted and lowered, and the stirring plate can not only cut the mixed gas horizontally, but also can be vertically stirred up and down, and multiple mixing modes are coordinated, so that the flue gas and the ammonia gas are uniformly mixed, the denitration reaction is fully carried out, the denitration efficiency is improved, the emission requirements are met, the ammonia escape is reduced, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a front view structural schematic diagram of the main body of the utility model;
[0017] Figure 2 It is a sectional view structural schematic diagram of the main body of the utility model;
[0018] Figure 3 It is an explosion structural schematic diagram of the moving mechanism of the utility model;
[0019] Figure 4 It is a Figure 2 It is an enlarged schematic diagram of structure A in the middle.
[0020] In the drawing: 1, bottom plate; 2, mixing tank; 3, reaction box; 4, flue gas pipe; 5, ammonia gas pipe; 6, connecting pipe; 7, exhaust pipe; 8, motor; 9, driving wheel; 10, driven wheel; 11, mounting cover; 12, connecting cover; 13, catalyst module; 14, rotating plate; 15, flow guide cover; 16, filter plate; 17, connecting rod; 18, scraper; 19, upper moving block; 20, lower moving block; 21, mounting ring; 22, mounting rod; 23, stirring plate; 24, connecting ring; 25, spring. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0022] Please refer to Figures 1-4The utility model provides a technical scheme: a flue gas denitration equipment, including bottom plate 1, the top fixed mounting of bottom plate 1 has mixing tank 2, and the left side fixed communication of mixing tank 2 has flue gas pipe 4, and the top rotation of mixing tank 2 is equipped with ammonia gas pipe 5, and mixing tank 2 is installed with the mixing assembly of making ammonia gas and flue gas even mix, and the catalytic assembly of making flue gas and ammonia gas reaction is installed on bottom plate 1,
[0023] Mixing assembly includes fairing 15, and fairing 15 is fixedly connected in the inner wall of mixing tank 2, and a plurality of groups of first through holes are formed on the inner wall of fairing 15, and a plurality of groups of second through holes are formed on ammonia gas pipe 5, and mixing tank 2 is installed with the stirring mechanism for stirring the gas in mixing tank 2.
[0024] When using, flue gas enters mixing tank 2 from flue gas pipe 4, and fairing 15 blocks the rising flue gas, so that the flow rate of flue gas is reduced, and low-speed flue gas is sprayed out through the first through hole, and ammonia gas is introduced into ammonia gas pipe 5, so that ammonia gas is sprayed out from the second spray hole, at this time, ammonia gas and flue gas collide with each other, and preliminary mixing occurs, and then the stirring mechanism is used to cut and stir the gas in mixing tank 2, so that flue gas and ammonia gas are interpenetrated and intermingled, and uniformly mixed together, and the mixed ammonia gas and flue gas are fully reacted under the action of the catalytic assembly to generate nitrogen and water vapor, so that the denitration effect is good, the emission requirements can be met, the ammonia escape phenomenon is less, and the production cost is reduced.
[0025] The stirring mechanism includes motor 8, motor 8 is fixedly installed on mixing tank 2, the output end of motor 8 is fixedly connected with driving wheel 9, driven wheel 10 is fixedly sleeved on the outside of ammonia gas pipe 5, belt is tightly sleeved between driving wheel 9 and driven wheel 10, rotating plate 14 is slidably sleeved on the outside of ammonia gas pipe 5, a plurality of groups of installation rods 22 are fixedly sleeved on the outside of a plurality of groups of connecting rings 24, a plurality of groups of stirring plates 23 are fixedly installed on connecting ring 24, and moving mechanism for driving rotating plate 14 to move up and down is installed on mixing tank 2.
[0026] The moving mechanism includes mounting ring 21, mounting ring 21 is fixedly connected to the inner wall of mixing tank 2, a plurality of groups of lower moving blocks 20 are fixedly connected to the top of mounting ring 21, a plurality of groups of upper moving blocks 19 matched with lower moving blocks 20 are fixedly connected to the bottom of rotating plate 14, and inclined surfaces are arranged on the upper and lower moving blocks 19 and 20.
[0027] When motor 8 is started, driving wheel 9 is driven to rotate, then ammonia gas pipe 5 rotates, driving rotating plate 14 to rotate, making installation rod 22 rotate, driving stirring plate 23 to rotate through connecting ring 24, and rotating plate 14 drives upper moving block 19 to rotate when rotating plate 14 rotates, under the action of inclined surface, upper moving block 19 drives rotating plate 14 to rise when upper moving block 19 passes through lower moving block 20, and then rotating plate 14 descends under the action of gravity, driving connecting ring 24 to rise and fall.
[0028] The catalytic assembly comprises a reaction box 3 fixedly installed on the top of the base plate 1, a plurality of groups of catalyst modules 13 fixedly installed on the inner wall of the reaction box 3, a connecting pipe 6 fixedly communicated with the left side of the reaction box 3, the end of the connecting pipe 6 away from the reaction box 3 being fixedly communicated with the mixing tank 2, and an exhaust pipe 7 fixedly communicated with the right side of the reaction box 3.
[0029] The uniformly mixed flue gas and ammonia gas enter the reaction box 3 through the connecting pipe 6 and react under the action of the catalyst modules 13, and the nitrogen gas and water vapor generated by the reaction are discharged from the exhaust pipe 7.
[0030] The mixing tank 2 is fixedly connected with a mounting cover 11 at the top of the inner cavity, the mounting cover 11 is slidably connected with a connecting cover 12 on the inner wall, the connecting cover 12 is movably sleeved on the ammonia gas pipe 5, the bottom of the connecting cover 12 is in abutment with the top of the rotating plate 14, the mixing tank 2 is fixedly connected with a spring 25 at the top of the inner cavity, the mounting cover 11 is sleeved on the spring 25, and the bottom of the spring 25 is fixedly connected with the connecting cover 12.
[0031] The bottom of the upper moving block 19 is always in abutment with the top of the lower moving block 20 or the mounting ring 21, so that the stability during lifting is ensured.
[0032] The inner wall of the flow guide cover 15 is fixedly connected with a filter plate 16, the connecting rod 17 is rotatably arranged on the filter plate 16, the bottom of the connecting rod 17 is fixedly connected with a scraper 18, the top of the scraper 18 is in abutment with the bottom of the filter plate 16, the connecting rod 17 is rotatably arranged through the flow guide cover 15, and the top of the connecting rod 17 is fixedly connected with the bottom of the ammonia gas pipe 5.
[0033] The dust in the flue gas is filtered through the filter plate 16, so that the dust accumulation is avoided to affect the denitration effect, the ammonia gas pipe 5 is rotated to drive the connecting rod 17 and the scraper 18 to rotate, the filter plate 16 is cleaned, and the filter plate 16 is prevented from being blocked.
[0034] Working principle: when in use, flue gas enters the mixing tank 2 from the flue gas pipe 4, the flow guide cover 15 blocks the rising flue gas, so that the flow rate of the flue gas is reduced, and the low-speed flue gas is sprayed through the first through hole, at the same time, ammonia gas is introduced into the ammonia gas pipe 5, so that the ammonia gas is sprayed from the second spray hole, at this time, the ammonia gas and the flue gas collide with each other and preliminarily mix. When the motor 8 is started, the driving wheel 9 is driven to rotate, so that the ammonia gas pipe 5 rotates, drives the rotating plate 14 to rotate, and drives the mounting rod 22 to rotate, drives the stirring plate 23 to rotate through the connecting ring 24, and at the same time, the rotating plate 14 drives the upper moving block 19 to rotate, when the upper moving block 19 passes through the lower moving block 20, the upper moving block 19 drives the rotating plate 14 to rise under the action of the inclined surface, and then the rotating plate 14 descends under the action of gravity, drives the connecting ring 24 to ascend and descend, and the gas in the mixing tank 2 is cut and stirred through the rotation of the stirring plate 23 and the ascending and descending of the connecting ring 24, so that the flue gas and the ammonia gas are mutually interpenetrated, intermingled and uniformly mixed together, so as to ensure the denitration effect, meet the emission requirements, reduce the ammonia escape phenomenon and reduce the production cost. The uniformly mixed flue gas and ammonia gas enter the reaction box 3 through the connecting pipe 6, and react under the action of the catalyst module 13, and the nitrogen and water vapor generated by the reaction are discharged from the exhaust pipe 7.
[0035] It should be noted that, in this text, relational terms such as first and second and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article, or equipment.
[0036] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A flue gas denitration apparatus comprising a base plate (1), characterized in that: The bottom plate (1) top fixed installation has the mixing jar (2), the mixing jar (2) left side fixed communication has the flue gas pipe (4), the mixing jar (2) top rotation is equipped with the ammonia gas pipe (5), the mixing jar (2) on installation has the mixing subassembly that ammonia gas and flue gas are evenly mixed, the bottom plate (1) on installation has the catalytic subassembly that flue gas and ammonia gas occur reaction; The mixing subassembly includes a fairing (15), the fairing (15) is fixedly connected to the inner wall of the mixing jar (2), a plurality of first through holes are formed in the inner wall of the fairing (15), a plurality of second through holes are formed in the ammonia gas pipe (5), and a stirring mechanism for stirring the gas in the mixing jar (2) is installed on the mixing jar (2).
2. The flue gas denitration apparatus according to claim 1, characterized by: The stirring mechanism includes a motor (8), the motor (8) is fixedly installed on the mixing jar (2), the output end of the motor (8) is fixedly connected with a driving wheel (9), a driven wheel (10) is fixedly sleeved outside the ammonia gas pipe (5), a belt is tightly sleeved between the driving wheel (9) and the driven wheel (10), a rotating plate (14) is slidably sleeved outside the ammonia gas pipe (5), a plurality of installation rods (22) are fixedly connected to the bottom of the rotating plate (14), a plurality of connecting rings (24) are fixedly sleeved outside the installation rods (22), a plurality of stirring plates (23) are fixedly installed on the connecting rings (24), and a moving mechanism for driving the rotating plate (14) to move up and down is installed on the mixing jar (2).
3. The flue gas denitration apparatus according to claim 2, characterized by: The moving mechanism includes an installation ring (21), the installation ring (21) is fixedly connected to the inner wall of the mixing jar (2), a plurality of lower moving blocks (20) are fixedly connected to the top of the installation ring (21), a plurality of upper moving blocks (19) matched with the lower moving blocks (20) are fixedly connected to the bottom of the rotating plate (14), and inclined surfaces are formed on the upper moving blocks (19) and the lower moving blocks (20).
4. The flue gas denitration apparatus according to claim 1, characterized by: The catalytic subassembly includes a reaction box (3), the reaction box (3) is fixedly installed on the top of the bottom plate (1), a plurality of catalyst modules (13) are fixedly installed on the inner wall of the reaction box (3), a connecting pipe (6) is fixedly communicated with the left side of the reaction box (3), one end of the connecting pipe (6) away from the reaction box (3) is fixedly communicated with the mixing jar (2), and an exhaust pipe (7) is fixedly communicated with the right side of the reaction box (3).
5. The flue gas denitration apparatus according to claim 2, characterized by: The inner cavity of the mixing jar (2) is fixedly connected with a mounting cover (11), the inner wall of the mounting cover (11) is slidably installed with a connecting cover (12), the connecting cover (12) is movably sleeved outside the ammonia gas pipe (5), the bottom of the connecting cover (12) abuts against the top of the rotating plate (14), the inner cavity of the mixing jar (2) is fixedly connected with a spring (25), the mounting cover (11) is sleeved outside the spring (25), and the bottom of the spring (25) is fixedly connected with the connecting cover (12).
6. The flue gas denitration apparatus according to claim 1, characterized by: The inner wall of the deflector (15) is fixedly connected with a filter plate (16), a connecting rod (17) is rotatably arranged on the filter plate (16), the bottom of the connecting rod (17) is fixedly connected with a scraper (18), the top of the scraper (18) abuts against the bottom of the filter plate (16), the connecting rod (17) is rotatably arranged through the deflector (15), and the top of the connecting rod (17) is fixedly connected with the bottom of the ammonia gas pipe (5).