CN113663486A - Ozone buffer tank, denitration device and method for adjusting ozone concentration - Google Patents
Ozone buffer tank, denitration device and method for adjusting ozone concentration Download PDFInfo
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- CN113663486A CN113663486A CN202110801813.0A CN202110801813A CN113663486A CN 113663486 A CN113663486 A CN 113663486A CN 202110801813 A CN202110801813 A CN 202110801813A CN 113663486 A CN113663486 A CN 113663486A
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- 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
- B01D53/346—Controlling the process
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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
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- B01D2258/00—Sources of waste gases
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Abstract
The invention discloses an ozone buffer tank, a denitration device and a method for adjusting ozone concentration, wherein the ozone buffer tank comprises an air storage cylinder, a buffer chamber provided with a volume adjusting device, a pressure sensor, an electromagnetic valve and a controller, one end of the air storage cylinder is connected with an ozone output port of an ozone generator through an air inlet pipe, the other end of the air storage cylinder is provided with an air outlet pipe for outputting ozone, the buffer chamber is communicated with the air storage cylinder or the air outlet pipe through the electromagnetic valve, the pressure sensor is arranged in the air storage cylinder and is connected with an input end of the controller, and control ends of the electromagnetic valve and the volume adjusting device of the buffer chamber are connected with an output end of the controller. Also provides a denitration device using the ozone buffer tank and a method for adjusting the concentration of ozone. The ozone concentration output by the air storage cylinder is adjusted by utilizing the buffer chamber with the volume adjusting device, so that the ozone concentration can be adjusted according to the external conditionsIs rapidly changed by the fluctuation of ozone and NOXThe proportion of (2) is maintained in a set range, and the waste of ozone is avoided while the denitration effect of the sintering flue gas is ensured.
Description
Technical Field
The invention relates to an ozone buffer tank and a denitration device for treating sintering flue gas, and belongs to the technical field of metallurgical equipment.
Background
The sintering process is one of important sources of pollutant emission in the steel industry, and the ozone oxidation denitration technology is a novel sintering flue gas treatment technology and is characterized by low-temperature section denitration, utilization of the existing desulfurizing tower, safety, no pollution, high denitration efficiency and the like. The ozone generator is used as the ozone generator, and the generated ozone gas is distributed to the flue gas pipeline through the gas distribution device and contains NOXThe flue gas is fully mixed in the flue gas pipeline and oxidation reaction occurs. Research shows that ozone and NOXThe proportion of (A) needs to be controlled within a certain range to meet the denitration requirement and not consume too much ozone. However, the ozone generated by the existing ozone generator needs a long process to reach the specified concentration, and when the external conditions fluctuate frequently, the concentration of the ozone cannot be changed along with the ozone to keep the ozone and NOXThereby affecting the denitration effect or causing the waste of ozone. In addition, frequent power changes of the ozone generator can shorten the service life of the ozone generator, and the flue gas treatment cost is increased.
Disclosure of Invention
The invention aims to provide an ozone buffer tank and a denitration device aiming at the defects of the prior art, so that the ozone concentration can adapt to the frequent fluctuation of external conditions, the denitration effect of sintering flue gas is ensured, and the waste of ozone is avoided.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an ozone buffer tank, includes the gas receiver, is equipped with volume adjusting device's cushion chamber, pressure sensor, solenoid valve and controller, the one end of gas receiver is met through intake pipe and ozone generator's ozone delivery outlet, and the other end is equipped with the outlet duct that is used for exporting ozone, the cushion chamber communicates with each other with gas receiver or outlet duct through the solenoid valve, pressure sensor installs and meets with the input of controller in the gas receiver, and the volume adjusting device's of solenoid valve and cushion chamber control end is connected with the output of controller.
Above-mentioned ozone buffer tank, the external fixation of gas receiver has coaxial cylindric shell, volume adjusting device includes electric putter and the annular push pedal that meets with the controller, the inner edge of push pedal and the outer wall sliding seal of gas receiver are connected, and the inner wall sliding seal of outer fringe and shell is connected, and the space that the outer wall of push pedal and gas receiver and outlet duct and the inner wall of shell enclose forms the cushion chamber, electric putter's axis is parallel with the axis of gas receiver, and electric putter's one end is connected with the push pedal, and the other end meets with the shell to the accessible drive push pedal removes the volume that changes the cushion chamber.
Above-mentioned ozone buffer tank, be fixed with a plurality of and the axis vertically separation blade of air receiver on the inner wall of air receiver, the separation blade is irregularly arranged along the axial of air receiver.
Above-mentioned ozone buffer tank, the intake pipe is connected with ozone generator through the air inlet that sets up on the shell, the outlet duct is through setting up the gas outlet output ozone on the shell.
Above-mentioned ozone buffer tank, electric putter sets up two, and they symmetry are installed in the both sides of gas receiver.
The ozone buffer tank is provided with two electromagnetic valves which are symmetrically arranged on two sides of the air outlet pipe.
Above-mentioned ozone buffer tank, electric putter installs in the push pedal one side towards the intake pipe.
Above-mentioned ozone buffer tank, the controller is installed on the outer wall of shell.
A denitration device using the ozone buffer tank comprises an ozone generator, the ozone buffer tank, a premixing fan, an ozone distributor, an absorption tower, a process water tank, an absorbent bin, a dust remover, an exhaust fan and a chimney, wherein ozone gas output by the ozone generator is sent into the ozone buffer tank through a gas pipe, the concentration of the ozone gas is adjusted by the ozone buffer tank, an ozone inlet of the premixing tank is connected with a gas outlet of the ozone buffer tank, an air inlet of the premixing fan is connected with an air supply opening of the premixing fan, a mixed gas outlet of the premixing tank is connected with the ozone distributor installed on a flue gas pipeline through a pipeline, gas output by the flue gas pipeline is discharged into the atmosphere through the dust remover, the exhaust fan and the chimney in sequence, the process water tank and the absorbent bin are installed above the absorption tower, and discharged liquid of the process water tank and the absorbent bin is sent into the absorption tower through a pipeline.
A method for adjusting the concentration of ozone by using the ozone buffer tank, comprising the following steps:
a. the controller detects the concentration of ozone in the air storage cylinder through the pressure sensor when the ozone and NO are in the stateXWhen the proportion reaches the set range, the controller closes the electromagnetic valve, and the ozone buffer tank conveys ozone to the next-stage equipment;
b. when the external condition changes and needs to reduce the ozone concentration, the controller enables the electromagnetic valve to be opened, and simultaneously controls the electric push rod to drive the push plate to move towards the direction far away from the air outlet pipe, so that part of ozone is diffused from the air storage cylinder to the buffer chamber, the ozone concentration in the air storage cylinder is reduced until the ozone and NO are reducedXWhen the proportion of the electromagnetic valve reaches the set range again, the electromagnetic valve is closed;
c. when the external condition changes and needs to increase the output concentration of ozone, the controller controls the electric push rod to drive the push plate to move towards the direction close to the air outlet pipe so as to increase the concentration of ozone in the air storage cylinder until the concentration of ozone and NO is increasedXWhen the proportion reaches the set range again, the electromagnetic valve is closed.
The invention utilizes the buffer chamber with the volume adjusting device to adjust the ozone concentration output by the air storage cylinder, so that the ozone concentration can be quickly changed along with the fluctuation of external conditionsRapidly change the ozone with NOXThe proportion of (2) is maintained in a set range, so that the denitration effect of the sintering flue gas can be ensured, and the waste of ozone is avoided. In addition, because the ozone generator does not participate in the regulation of the concentration of the ozone any more, the power of the ozone generator can be kept at a rated value, the service life of the ozone generator is prolonged, and the flue gas treatment cost is reduced.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural view of an ozone buffer tank of the present invention;
fig. 2 is a schematic structural view of the denitration apparatus of the present invention.
The reference numbers in the figures are: 1. a housing; 2. an air inlet; 3. an air outlet; 4. an air cylinder; 5. an air inlet pipe; 6. an air outlet pipe; 7. an air storage chamber; 8. a buffer chamber; 9. pushing the plate; 10. an electric push rod; 11. an electromagnetic valve; 12. a pressure sensor; 13. a baffle plate; 14. a controller; 15. an ozone generator; 16. a premixing fan; 17. an ozone buffer tank; 18. a flue gas duct; 19. an ozone distributor; 20. an absorption tower; 21. a process water tank; 22. an absorbent bin; 23. a dust remover; 24. a chimney; 25. premixing tank, 26, exhaust fan.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the ozone buffer tank of the present invention comprises:
a housing 1 provided with an air inlet 2 and an air outlet 3; the air storage cylinder 4 is arranged in the shell 1 and communicated with the shell; an air inlet pipe 5 and an air outlet pipe 6 which are respectively connected with the air inlet 2 and the air outlet 3; the volume adjusting device is arranged in the buffer chamber 8 and comprises a push plate 9 and an electric push rod 10; a controller 14 arranged on the outer wall of the shell 1, an air storage chamber 7 formed inside the air storage cylinder 4, and a buffer chamber 8 formed between the lower surface of the push plate 9, the outer wall of the air storage cylinder 4, the outer wall of the air outlet pipe 6 and the inner wall of the shell 1.
5 one end of intake pipe and air receiver 4 intercommunication, the other end passes through air inlet 2 and ozone generator 15 intercommunication on the shell 1, solenoid valve 11 can make the ozone in the air receiver 4 keep in buffer chamber 8, volume adjusting device makes the ozone in buffer chamber 8 discharge into air receiver 4 to adjust the ozone concentration in the air receiver 4, reach the purpose of the ozone concentration of quick, stable regulation ozone buffer tank 17 output, the work efficiency of equipment has been improved.
Specifically, the air inlet 2 is arranged at the top of the shell 1, the air outlet 3 is arranged at the bottom of the shell 1, and the volume of the air storage cylinder 4 is half of that of the shell 1; the air inlet pipe 5 and the air outlet pipe 6 are respectively in threaded connection with the air storage cylinder 4, the air inlet 2 and the air outlet 3, and are convenient to detach and maintain.
The volume adjusting device comprises an annular push plate 9 and an electric push rod 10, wherein the periphery of the annular push plate is connected between the inner wall of the shell 1 and the outer wall of the air storage cylinder 4 in a sliding manner, and the electric push rod 10 is vertically connected to the push plate 9; the upper end of the electric push rod 10 is fixedly connected with the air storage cylinder 4, the lower end of the electric push rod is vertically connected with the push plate 9, and the sliding connection part of the periphery of the push plate 9 is sealed to ensure that no air leakage occurs during sliding; the cooperation of electric putter 10 and push pedal 9, the volume size that accessible regulation push pedal 9 lower part and shell 1 inner wall and air receiver 4 outer wall formed adjusts ozone concentration in the air receiver 7.
Two solenoid valves 11 are symmetrically arranged on the outer wall of the air outlet pipe 6, a pressure sensor 12 is arranged on the inner wall of the air storage cylinder, the solenoid valves 11 and the pressure sensor 12 are both connected with a controller 14, and the ozone concentration in the air storage chamber 7 is reflected through the pressure sensor 12 to determine whether the solenoid valves 11 are opened to communicate the air storage chamber 7 and the buffer chamber 8.
For further playing the cushioning effect, fixedly on the inner wall of the air cylinder 4 being provided with a plurality of separation blades 13, the separation blades 13 are horizontally arranged (vertical to the axis of the air cylinder 4) and connected with the air cylinder 4, so that the flow impact force of the ozone entering the air cylinder 7 from the air inlet 2 can be reduced, and the stability of the ozone in the air cylinder 7 is improved.
Referring to fig. 2, the invention also provides a denitration device using the ozone buffer tank, and the denitration device comprises a premixing fan 16, an ozone buffer tank 17, a flue gas pipeline 18, an ozone distributor 19, an absorption tower 20, a process water tank 21, an absorbent bin 22, a dust remover 23, a chimney 24, a premixing tank 25 and an exhaust fan 26.
The invention also provides a method for adjusting the concentration of ozone by using the ozone buffer tank, which comprises the following steps:
a. ozone generated by an ozone generator is conveyed to an ozone buffer tank, after the concentration of the ozone in the air storage chamber 7 reaches a set concentration range through a pressure sensor 12, the ozone is conveyed to a lower-level device (a premixing tank 25 in fig. 2) from the air outlet 3, when the output concentration of the ozone needs to be reduced, an electromagnetic valve 11 is opened, a controller 14 controls an electric push rod 10 to drive a push plate 9 to move towards one end far away from the air outlet 3, and the ozone is diffused to the buffer chamber 8 from the air storage chamber 7 so as to reduce the concentration of the ozone in the air storage chamber 7;
when the ozone output concentration needs to be increased, the controller 14 controls the electric push rod 10 to drive the push plate 9 to move towards the end close to the air outlet 3 so as to increase the ozone concentration in the air storage chamber 7.
Ozone reaching a preset concentration range and air sucked by the premixing fan 16 enter the premixing tank 25 to be mixed, so that the mixing uniformity of the air and the ozone can be improved, the ozone can be fully mixed with flue gas on the ozone distributor 19, diluted ozone gas is conveyed to the ozone distributor 19 to be mixed with the flue gas, and the mixed gas sequentially passes through the absorption tower 20, the dust remover 23, the premixing fan 16 and the chimney 24, so that the aim of flue gas denitration is fulfilled.
As an alternative embodiment, two or four air reservoirs 4 may be provided inside the housing 1. It is also possible to use a separate damping chamber 8, which damping chamber 8 may be formed by a rodless chamber of a cylinder.
The technical scheme of the invention has the following advantages:
1. the ozone buffer tank provided by the invention has the advantages that at least one air storage cylinder is arranged in the shell, an air storage chamber is formed in the air storage cylinder, a buffer chamber is formed between the interior of the shell and the exterior of the air storage cylinder, and the volume adjusting device arranged in the buffer chamber can temporarily store ozone in the air storage chamber into the buffer chamber or discharge the ozone in the buffer chamber into the air storage chamber so as to adjust the ozone concentration in the air storage chamber, so that the aim of quickly and stably adjusting the ozone concentration output by the ozone buffer tank is fulfilled, and the working efficiency of equipment is improved.
2. Before mixing the ozone generated by the ozone generator and the flue gas to be purified, firstly conveying the ozone to an ozone buffer tank to control the concentration of the output ozone within a preset concentration range, solving the problem that the ozone generator is difficult to adjust the concentration of the ozone, and improving the efficiency of adjusting the concentration of the ozone; the produced ozone is mixed with the air pumped by the premixing tank and the premixing fan, so that the mixing uniformity of the air and the ozone can be improved, the ozone distributor can be more favorably and fully mixed with the flue gas, the waste caused by the mixing of excessive ozone and the flue gas is avoided, and the process cost is reduced.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The utility model provides an ozone buffer tank, characterized by, includes gas receiver (4), is equipped with buffer chamber (8), pressure sensor (12), solenoid valve (11) and controller (14) of volume adjusting device, the ozone delivery outlet that intake pipe (5) and ozone generator (15) are passed through to the one end of gas receiver (4) meets, and the other end is equipped with outlet duct (6) that are used for exporting ozone, buffer chamber (8) communicate with each other through solenoid valve (11) and gas receiver (4) or outlet duct (6), pressure sensor (12) are installed in gas receiver (4) and are met with the input of controller (14), and solenoid valve (11) and the volume adjusting device's of buffer chamber (8) control end is connected with the output of controller (14).
2. An ozone buffer tank according to claim 1, characterized in that a coaxial cylindrical housing (1) is fixed outside the air storage cylinder (4), the volume adjusting device comprises an electric push rod (10) connected with a controller (14) and an annular push plate (9), the inner edge of the push plate (9) is connected with the outer wall of the air storage cylinder (4) in a sliding and sealing way, the outer edge of the push plate is connected with the inner wall of the shell (1) in a sliding and sealing way, a buffer chamber (8) is formed by the push plate (9), the outer walls of the air storage cylinder (4) and the air outlet pipe (6) and the space enclosed by the inner wall of the shell (1), the axial line of the electric push rod (10) is parallel to the axial line of the air storage cylinder (4), one end of the electric push rod (10) is connected with the push plate (9), the other end is connected with the shell (1), so that the volume of the buffer chamber (8) can be changed by driving the push plate (9) to move.
3. The ozone buffer tank as claimed in claim 1 or 2, wherein a plurality of blocking pieces (13) perpendicular to the axis of the air storage cylinder (4) are fixed on the inner wall of the air storage cylinder (4), and the blocking pieces (13) are irregularly arranged along the axial direction of the air storage cylinder (4).
4. An ozone buffer tank as claimed in claim 3, characterised in that the inlet pipe (5) is connected to the ozone generator (15) via an inlet port (2) provided in the housing (1), and the outlet pipe (6) outputs ozone via an outlet port (3) provided in the housing (1).
5. The ozone buffer tank as claimed in claim 4, wherein two electric push rods (10) are provided, and are symmetrically arranged on two sides of the air storage cylinder (4).
6. An ozone buffer tank as claimed in claim 5, characterized in that said two electromagnetic valves (11) are symmetrically arranged on both sides of the outlet pipe (6).
7. An ozone buffer tank according to claim 6, characterized in that the electric push rod (10) is mounted on the side of the push plate (9) facing the air inlet pipe (5).
8. An ozone buffer vessel according to claim 7, characterized in that said controller (14) is mounted on the outer wall of the housing (1).
9. A denitration device using the ozone buffer tank of any one of claims 1, 2 and 4-8, which is characterized by comprising an ozone generator (15), an ozone buffer tank (17), a premixing tank (25), a premixing fan (16), an ozone distributor (19), an absorption tower (20), a process water tank (21), an absorbent bin (22), a dust remover (23), an exhaust fan (26) and a chimney (24), wherein ozone gas output by the ozone generator (15) is delivered into the ozone buffer tank (17) through a gas delivery pipe and the concentration of the ozone gas is adjusted by the ozone buffer tank (17), an ozone inlet of the premixing tank (25) is connected with a gas outlet of the ozone buffer tank (17), an air inlet is connected with a gas supply outlet of the premixing fan (16), a mixed gas outlet of the premixing tank (25) is connected with the ozone distributor (19) arranged on a flue gas pipeline (18) through a pipeline, gas output by the flue gas pipeline (18) is discharged into the atmosphere through a dust remover (23), an exhaust fan 26 and a chimney 24 in sequence, the process water tank (21) and the absorbent bin (22) are arranged above the absorption tower (20), and liquid discharged by the process water tank and the absorbent bin is conveyed into the absorption tower (20) through a pipeline.
10. A method for regulating ozone concentration using the ozone buffer tank of any one of claims 2 and 4 to 8, comprising the steps of:
a. the controller (14) detects the concentration of ozone in the air storage cylinder (4) through the pressure sensor (12) when the ozone and NO are in the same stateXWhen the proportion reaches the set range, the controller (14) closes the electromagnetic valve (11), and the ozone buffer tank (17) conveys ozone to the lower-level equipment;
b. when the external condition changes and the ozone concentration needs to be reduced, the controller (14) enables the electromagnetic valve (11) to be opened, and simultaneously controls the electric push rod (10) to drive the push plate (9) to move towards the direction far away from the air outlet pipe (6), so that part of ozone is diffused from the air storage cylinder (4) to the buffer chamber (8) to reduce the ozone concentration in the air storage cylinder (4) until the ozone and NO are reducedXWhen the proportion of the electromagnetic valve reaches the set range again, the electromagnetic valve (11) is closed;
c. when the external condition changes and the ozone output concentration needs to be increased, the controller (14) controls the electric push rod (10) to drive the push plate (9) to move towards the direction close to the air outlet pipe (6) so as to increase the ozone concentration in the air storage cylinder (4) until the ozone and NO are increasedXWhen the ratio of (2) is within the set range again, the electromagnetic valve (11) is closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110801813.0A CN113663486B (en) | 2021-07-15 | 2021-07-15 | Ozone buffer tank, denitration device and method for adjusting ozone concentration |
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| CN202110801813.0A CN113663486B (en) | 2021-07-15 | 2021-07-15 | Ozone buffer tank, denitration device and method for adjusting ozone concentration |
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Cited By (1)
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| CN114870617A (en) * | 2022-03-24 | 2022-08-09 | 江苏宇动环保科技有限公司 | Biological filler device for biological deodorization filter |
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| CN113663486B (en) | 2023-05-12 |
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