CN110368787B - Ozone denitration sprays mixing device - Google Patents
Ozone denitration sprays mixing device Download PDFInfo
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- CN110368787B CN110368787B CN201910670406.3A CN201910670406A CN110368787B CN 110368787 B CN110368787 B CN 110368787B CN 201910670406 A CN201910670406 A CN 201910670406A CN 110368787 B CN110368787 B CN 110368787B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
- B01F23/19—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
- B01F25/4314—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor with helical baffles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention belongs to the technical field of ozone denitration, and particularly relates to an ozone denitration spraying and mixing device. The blending device comprises a reaction pipeline and a plurality of injection devices connected with an ozone generator, wherein an ozone main pipe is arranged in the reaction pipeline, and the injection devices are arranged on the side wall of the ozone main pipe; the spraying device consists of a spraying main pipe and a spraying branch pipe, and the spraying branch pipe is provided with a nozzle; the main injection pipe and the two branch injection pipes are Y-shaped, and the main injection pipe is communicated with the main ozone pipe; the two injection branch pipes face in two directions of oblique upward and oblique downward; the main spraying pipe and the branch spraying pipe are arranged in the protective cover; a spiral rotational flow plate is arranged in the reaction pipeline; the ozone main pipe can rotate under the action of the motor. The mixing device has the advantages of simple structure, high flue gas flow velocity, good mixing effect of the spray head and the raw flue gas, high working efficiency and long service life.
Description
Technical Field
The invention belongs to the technical field of ozone denitration, and particularly relates to an ozone denitration spraying and mixing device.
Background
With NOXIncreasing the amount of emission of NOXThe problem of environmental pollution caused by the pollution is increasingly attracting attention. Due to the fuel characteristics and the flue gas components of the garbage incinerator and the biomass fuel boiler and the fly ash properties, the conventional SCR method and SNCR method cannot be used for flue gas denitration.
At present, two mainstream schemes are low-temperature SCR and ozone oxidation denitration technology. Compared with the prior art, the denitration method by the ozone oxidation method has great advantages in technical economy. The denitration by ozone oxidation mainly utilizes the strong oxidizing property of ozone to remove NO in the flue gasXOver 95% of insoluble NO is converted into soluble high-valence nitrogen oxide, and then the high-valence nitrogen oxide is absorbed by water or alkali in a washing towerTo produce nitric acid or its salt to remove NOXThe purpose of (1). The reaction equation is as follows:
NO+O3→NO2+O2
NO2+O3→NO3+O2
NO3+NO2→N2O5
4NO2+O2+2H2O＝4HNO3
2HNO3+Ca(OH)2＝Ca(NO3)2+2H2O
the research shows that: the ozone oxidation method belongs to a fast reaction, and ozone and NO are mixed wellXThe reaction of (a) reaches essentially equilibrium within 0.1 seconds.
Thus, ozone and NOXThe mixing effect and speed of the device have very important influence on the denitration efficiency, the current applied injection device is composed of a main pipe and a plurality of spray heads, and the spray heads are contacted with flue gas flow for a long time, so that the spray heads are easy to wear and have poor mixing effect with the original flue gas; adopt flat whirl board, hinder gas flow, influence work efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects, the invention provides the ozone denitration spraying and mixing device which is simple in structure, high in flue gas flow velocity, good in mixing effect of the spray head and the raw flue gas, high in working efficiency, not easy to wear and long in service life.
The technical scheme adopted by the invention for solving the technical problems is as follows: an ozone denitration spraying and mixing device comprises a reaction pipeline and a spraying device connected with an ozone generator, wherein an ozone main pipe is arranged in the reaction pipeline, a first pressure space and a second pressure space are arranged in the ozone main pipe, the first pressure space and the second pressure space are separated by a pressure partition plate, and a through hole is formed in the pressure partition plate; a piston is arranged in the second pressure space, and a gap is formed between the piston and the inner wall of the second pressure space;
the plurality of injection devices are arranged on the side wall of the ozone main pipe; the spraying device consists of a main spraying pipe and branch spraying pipes, the main spraying pipe and the two branch spraying pipes are Y-shaped, and the main spraying pipe is communicated with the main ozone pipe; the two injection branch pipes face in two directions of oblique upward and oblique downward; the spraying branch pipe is provided with a nozzle; and a rotational flow plate is arranged in the reaction pipeline. The first pressure space and the second pressure space are arranged, so that the pressure when the ozone is sprayed out from the sampling main pipe can be increased, the ozone spraying flow speed is improved, the activation energy when the ozone is contacted with the flue gas is improved, and the flue gas treatment efficiency is improved; the injection branch pipes in different directions are arranged, one branch pipe is in convection with the flue gas stroke, and the contact area is increased; one branch pipe is in acute-angle contact with the flue gas, so that the stirring effect is achieved, and the reaction rate is improved; this structure ozone denitration sprays mixing device simple structure, and the whirl board of setting can increase the area of contact of flue gas and ozone, improves mixing efficiency.
Further, the swirl plate is a spiral plate. The spiral whirl board of spiral type can prolong the stroke of flue gas in reaction tube, does not influence the flue gas velocity of flow again, reduces reaction time, improves work efficiency, and the denitration is effectual.
Furthermore, be provided with a plurality of triangle fans on the whirl board, the triangle fan comprises three blade and the bracing piece of fixing on the whirl board. The triangular fan is further disturbed under the action of power when the flue gas and the ozone are conveyed and collide, the rotation energy comes from the flow of the gas in the system, the energy is saved, the consumption is reduced, and the mixing effect of the flue gas and the ozone is good.
Furthermore, the main spraying pipe and the branch spraying pipe are both arranged in the protective cover. The protection casing has the guard action to the nozzle that sets up on spraying the branch pipe to prevent that the nozzle and the long-term direct contact of flue gas from having wearing and tearing, extension this ozone denitration injection apparatus's life.
Further, the rotational flow plate is in seamless connection with the ozone main pipe. The rotational flow plate and the ozone are in charge of seamless connection, can improve the firm degree that rotational flow plate and system are connected, have the water conservancy diversion effect to the flue gas again, avoid the flue gas along the gap motion with ozone contact insufficient, can not reach anticipated denitration effect.
Further, the ozone main pipe can rotate under the action of the motor. When the rotational flow plate is only connected with the reaction pipeline and is not connected with the ozone main pipe, the injection device arranged on the ozone main pipe rotates along with the ozone main pipe, the ozone and the flue gas have flow speed difference, the turbulent flow phenomenon exists, and the two reaction rates are improved; when the rotational flow plate and the ozone are in seamless connection, the ozone is in charge of rotation, drives the rotational flow plate to rotate, and has a turbulent flow stirring effect on the flue gas, and is obvious, and the turbulent flow effect is superior to that of the rotational flow plate and is only connected with the reaction pipeline.
Further, a pressure regulating valve is arranged at the inlet of the second pressure space. The pressure regulating valve can detect the pressure in the system, and regulate the pressure in the first pressure space and the second pressure space according to the flow of the flue gas, so that automatic detection is realized, the accuracy rate of flue gas treatment is improved, and the waste of raw materials is avoided.
The invention has the beneficial effects that:
1. by adopting the scheme, the ozone denitration spraying and mixing device with the structure is simple in structure, and the arranged rotational flow plate can increase the contact area of the flue gas and the ozone and improve the mixing efficiency; the spiral rotational flow plate can prolong the stroke of the flue gas in the reaction pipeline, does not influence the flow velocity of the flue gas, reduces the reaction time, improves the working efficiency and has good denitration effect; the first pressure space and the second pressure space are arranged, so that the pressure when the ozone is sprayed out from the sampling main pipe can be increased, the ozone spraying flow speed is improved, the activation energy when the ozone is contacted with the flue gas is improved, and the flue gas treatment efficiency is improved; the injection branch pipes in different directions are arranged, one branch pipe is in convection with the flue gas stroke, and the contact area is increased; one branch pipe is in acute-angle contact with the flue gas, so that the stirring effect is achieved, and the reaction rate is improved; the triangular fan is further disturbed under the action of power when the flue gas and the ozone are conveyed and collide, the rotational energy comes from the flow of gas in the system, the energy is saved, the consumption is reduced, and the mixing effect of the flue gas and the ozone is good; the rotational flow plate and the ozone are in charge of seamless connection, can improve the firm degree that rotational flow plate and system are connected, have the water conservancy diversion effect to the flue gas again, avoid the flue gas along the gap motion with ozone contact insufficient, can not reach anticipated denitration effect.
2. The protection casing has the guard action to the nozzle that sets up on spraying the branch pipe to prevent that the nozzle and the long-term direct contact of flue gas from having wearing and tearing, extension this ozone denitration injection apparatus's life.
3. When the rotational flow plate is only connected with the reaction pipeline and is not connected with the ozone main pipe, the injection device arranged on the ozone main pipe rotates along with the ozone main pipe, the ozone and the flue gas have flow speed difference, the turbulent flow phenomenon exists, and the two reaction rates are improved; when the rotational flow plate and the ozone are in seamless connection, the ozone is in charge of rotation, drives the rotational flow plate to rotate, and has a turbulent flow stirring effect on the flue gas, and is obvious, and the turbulent flow effect is superior to that of the rotational flow plate and is only connected with the reaction pipeline.
4. The pressure regulating valve can detect the pressure in the system, and regulate the pressure in the first pressure space and the second pressure space according to the flow of the flue gas, so that automatic detection is realized, the accuracy rate of flue gas treatment is improved, and the waste of raw materials is avoided.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
FIG. 1 is a schematic view of the inventive structure;
FIG. 2 is a schematic view of the internal structure of the ozone main pipe according to the present invention;
FIG. 3 is a schematic view of the internal structure of the spraying device of the present invention;
FIG. 4 is a schematic view of a patent triangular fan according to the present invention;
wherein: 1 is a reaction pipeline, 2 is an ozone main pipe, 21 is a first pressure space, 22 is a second pressure space, 23 is a pressure clapboard, 24 is a through hole, 25 is a piston, 26 is a pressure regulating valve, 3 is a rotational flow plate, 4 is a spraying device, 41 is a spraying main pipe, 42 is a spraying branch pipe, 43 is a nozzle, 44 is a protective cover, 5 is a triangular fan, 51 is a blade, 52 is a supporting rod, 6 is an ozone generator, and A is a smoke direction.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-4, an ozone denitration spraying and mixing device comprises a reaction pipeline 1 and a spraying device 4 connected with an ozone generator, wherein an ozone main pipe 2 is arranged in the reaction pipeline 1, a first pressure space 21 and a second pressure space 22 are arranged in the ozone main pipe 2, the first pressure space 21 and the second pressure space 22 are separated by a pressure partition plate 23, and the pressure partition plate 23 is provided with a through hole 24; a piston 25 is arranged in the second pressure space 22, and a gap exists between the piston 25 and the inner wall of the second pressure space 22; a pressure regulating valve 26 is also arranged at the inlet of the second pressure space 22; the plurality of injection devices 4 are arranged on the side wall of the ozone main pipe 2; the injection device 4 consists of an injection main pipe 41 and injection branch pipes 42, the injection main pipe 41 and the two injection branch pipes 42 are Y-shaped, and the injection main pipe 41 is communicated with the ozone main pipe 2; the main spraying pipe 41 and the branch spraying pipes 42 are arranged in the protective cover 44; the two injection branch pipes 42 are oriented in two directions of an oblique upper direction and an oblique lower direction; the spraying branch pipe 42 is provided with a nozzle 43; a spiral rotational flow plate 3 is arranged in the reaction pipeline 1; the cyclone plate 3 is provided with a plurality of triangular fans 5, and each triangular fan 5 consists of three blades 51 and a support rod 52 fixed on the cyclone plate 3; the rotational flow plate 3 is connected with the ozone main pipe 2 in a seamless mode; the ozone main pipe 2 can rotate under the action of a motor.
The working principle of the ozone denitration spraying and mixing device is as follows:
the flue gas is blown in from the bottom end of the reaction pipeline 1 and moves along the spiral rotational flow plate 3; ozone generated by the ozone generator 6 enters the second pressure space 22 through the piston 25, enters the first pressure space 21 through the through hole 24, enters the internal pressure through the monitoring of the pressure regulating valve 26, enters the main injection pipe 41 under the condition that the pressure is used as a driving force, and is divided into two injection branch pipes 42; meanwhile, the ozone main pipe 2 rotates under the action of the motor, the turbulent flow effect is achieved on the smoke and ozone airflow, and part of kinetic energy of the smoke and ozone is converted into kinetic potential energy of the triangular fan 5 in the conveying process, so that energy is saved, consumption is reduced, the mixing effect is further improved, and the working efficiency is improved.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides an ozone denitration sprays mixing device, includes reaction tube (1) and the ozone that is connected with ozone generator (6) is responsible for (2) and is used for a plurality of injection apparatus (4) of ozone injection, its characterized in that: the ozone main pipe (2) is arranged in the reaction pipeline (1), a first pressure space (21) and a second pressure space (22) are arranged in the ozone main pipe (2), the first pressure space (21) and the second pressure space (22) are separated by a pressure partition plate (23), and a through hole (24) is formed in the pressure partition plate (23); a piston (25) is arranged in the second pressure space (22), a gap exists between the piston (25) and the inner wall of the second pressure space (22), ozone generated by the ozone generator (6) enters the second pressure space (22) through the piston (25) and then enters the first pressure space (21) through the through hole (24), and the ozone enters the injection main pipe (41) under the condition that the pressure is used as a driving force;
the plurality of injection devices (4) are arranged on the side wall of the ozone main pipe (2); the spraying device (4) consists of a spraying main pipe (41) and spraying branch pipes (42), the spraying main pipe (41) and the two spraying branch pipes (42) are Y-shaped, and the spraying main pipe (41) is communicated with the ozone main pipe (2); the two injection branch pipes (42) are oriented in two directions of oblique upward and oblique downward; the spraying branch pipe (42) is provided with a nozzle (43); and a rotational flow plate (3) is arranged in the reaction pipeline (1).
2. The ozone denitration spraying and mixing device as claimed in claim 1, wherein: the rotational flow plate (3) is a spiral plate.
3. The ozone denitration spraying and mixing device as claimed in claim 1, wherein: be provided with a plurality of triangle fans (5) on whirl board (3), triangle fan (5) comprise three blade (51) and bracing piece (52) of fixing on whirl board (3).
4. The ozone denitration spraying and mixing device as claimed in claim 1, wherein: the main spraying pipe (41) and the branch spraying pipes (42) are arranged in the protective cover (44).
5. The ozone denitration spraying and mixing device as claimed in claim 1, wherein: the rotational flow plate (3) is connected with the ozone main pipe (2) in a seamless mode.
6. The ozone denitration spraying and mixing device as claimed in claim 1 or 5, wherein: the ozone main pipe (2) can rotate under the action of the motor.
7. The ozone denitration spraying and mixing device as claimed in claim 1, wherein: a pressure regulating valve (26) is arranged at the inlet of the second pressure space (22).
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| CN201910670406.3A CN110368787B (en) | 2019-07-24 | 2019-07-24 | Ozone denitration sprays mixing device |
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| CN201910670406.3A CN110368787B (en) | 2019-07-24 | 2019-07-24 | Ozone denitration sprays mixing device |
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| CN110368787B true CN110368787B (en) | 2021-08-06 |
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| CN110368787A (en) | 2019-10-25 |
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