CN116422118B - Flue gas desulfurization and oxidation wind system and application method thereof - Google Patents
Flue gas desulfurization and oxidation wind system and application method thereof Download PDFInfo
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- CN116422118B CN116422118B CN202310417162.4A CN202310417162A CN116422118B CN 116422118 B CN116422118 B CN 116422118B CN 202310417162 A CN202310417162 A CN 202310417162A CN 116422118 B CN116422118 B CN 116422118B
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- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 145
- 230000003647 oxidation Effects 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 41
- 230000023556 desulfurization Effects 0.000 title claims abstract description 41
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000003546 flue gas Substances 0.000 title claims abstract description 31
- 239000002002 slurry Substances 0.000 claims abstract description 46
- 238000009826 distribution Methods 0.000 claims abstract description 43
- 238000005259 measurement Methods 0.000 claims abstract description 36
- 239000007921 spray Substances 0.000 claims abstract description 29
- 238000002955 isolation Methods 0.000 claims abstract description 26
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 15
- 238000011010 flushing procedure Methods 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 230000001590 oxidative effect Effects 0.000 claims description 20
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 230000033116 oxidation-reduction process Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005507 spraying Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- 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
- B01D53/30—Controlling by gas-analysis apparatus
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- 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
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a flue gas desulfurization and oxidation air system and a use method thereof, the structure of the flue gas desulfurization and oxidation air system comprises an ORP online measurement system and an oxidation air supply system, the ORP online measurement system comprises an ORP measurement box and an ORP measuring instrument, the ORP measuring instrument is arranged at the top of the ORP measurement box, an overflow port is arranged on the ORP measurement box, and the ORP measurement box is connected with a desulfurizing tower through a slurry pipeline; the oxidation wind supply system comprises an oxidation fan, an air outlet of the oxidation fan is connected with a main fan outlet pipe, the main fan outlet pipe is connected with a plurality of branch pipes, branch pipe isolation valves are arranged on the branch pipes, the branch pipes are connected with oxidation wind distribution pipes positioned in the desulfurization tower, and a plurality of oxidation wind spray holes are formed in the oxidation wind distribution pipes. When the total air supply quantity of the oxidation air system is larger than the air supply quantity under the full-load working condition, the reasonable air speed of the spray holes of the oxidation air distribution pipe in the tower can be maintained by adjusting the opening quantity of the branch pipe isolation valves outside the tower, so that the stay time of oxidation air in the tower is ensured, and the oxidation effect of slurry is ensured.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization, in particular to a flue gas desulfurization and oxidation wind system and a use method thereof.
Background
Most of the oxidation air systems of the desulfurization devices of the coal-fired units adopt fixed air quantity for supplying air, and the adopted air quantity adjusting mode is to adjust the number of running fans. The adjusting mode is rough, and under the condition of large air quantity change, the oxidized air is unevenly distributed in the desulfurizing tower, so that insufficient oxidation of slurry is easily caused; meanwhile, the air quantity adjustment cannot be well matched with the air quantity required by the slurry oxidation due to the adjustment mode, so that the operation cost is often increased in order to ensure the oxidation effect of the slurry.
At present, a large thermal power generating unit is often in low-load operation, the requirements on stable operation and energy conservation and consumption reduction of a desulfurization device under the low-load operation are higher and higher, the configuration of an oxidation wind system must be optimized, energy conservation and consumption reduction measures are adopted, and the safe and reliable operation of the desulfurization system is ensured.
Disclosure of Invention
The invention aims to provide a flue gas desulfurization oxidation wind system and a use method thereof, wherein the reasonable wind speed of spray holes of oxidation wind distribution pipes in a tower is maintained by adjusting the opening quantity of branch pipe isolation valves outside the tower, so that the residence time of oxidation wind in the tower is ensured, and the oxidation effect of slurry is ensured.
According to one object of the invention, the invention provides a flue gas desulfurization and oxidation wind system, which comprises an ORP online measurement system and an oxidation wind supply system, wherein the ORP online measurement system comprises an ORP measurement box and an ORP measuring instrument, the ORP measuring instrument is arranged at the top of the ORP measurement box, an overflow port is arranged on the ORP measurement box, and the ORP measurement box is connected with a desulfurization tower through a slurry pipeline; the oxidation wind supply system comprises an oxidation fan, an air outlet of the oxidation fan is connected with a main pipe of a fan outlet, the main pipe of the fan outlet is connected with a plurality of branch pipes, branch pipe isolation valves are arranged on the branch pipes, the branch pipes are connected with an oxidation wind distribution pipe positioned in the desulfurizing tower, and a plurality of oxidation wind spray holes are formed in the oxidation wind distribution pipe.
Further, a slurry isolation valve is arranged on the slurry pipeline.
Further, the ORP online measurement system is connected with an automatic process water flushing device, the automatic process water flushing device comprises a flushing pipeline and a process water flushing valve, one end of the flushing pipeline is connected with a process water pipeline, the other end of the flushing pipeline is connected with a slurry pipeline, and the process water flushing valve is arranged on the flushing pipeline.
Further, the oxidation fan is a variable-frequency adjusting high-speed centrifugal fan.
Further, an air quantity measuring instrument is arranged on the main pipe of the outlet of the fan.
Further, a main pipe safety valve and a main pipe isolation valve are further arranged on the main pipe of the fan outlet.
Further, a spraying cooling device is arranged on the main pipe of the outlet of the fan.
Further, the oxidation wind distribution pipe comprises an oxidation wind distribution section and a tower wall connection section, wherein the tower wall connection section is fixedly welded with the tower wall of the desulfurization tower, an oxidation wind interface and an overhaul interface are arranged on the tower wall connection section, the oxidation wind distribution section is connected with a liquid seal and an evacuation pipe, and oxidation wind spray holes are formed in the oxidation wind distribution section.
According to another object of the present invention, the present invention provides a method for using a flue gas desulfurization and oxidation wind system, comprising the steps of:
s1, determining the number of opened oxidation fans according to the concentration of sulfur dioxide and the flow rate of flue gas, performing rough adjustment on the oxidation air quantity, and under the condition that the concentration of sulfur dioxide in inlet flue gas and the flow rate of flue gas are not changed greatly, keeping the number of the operated oxidation fans unchanged, wherein the air quantity requirement can be determined according to the oxidation-reduction potential measured by the ORP online measurement system, and the air quantity adjustment can be performed through fan frequency conversion adjustment to realize fine adjustment so as to meet the accurate adjustment of the oxidation air quantity required by desulfurization slurry;
s2, oxidizing air enters the oxidizing air distribution pipes in the desulfurizing tower from two sides of the desulfurizing tower through the branch pipes, the oxidizing air is uniformly sprayed through the oxidizing air spray holes arranged on the oxidizing air distribution pipes, and the opening quantity of the branch pipe isolation valves on the branch pipes is adjusted according to the change of the total air quantity so as to ensure that the flow velocity of the oxidizing air passing through the oxidizing air spray holes is in a reasonable range.
Further, the branch pipe isolation valves on the two sides of the same oxidation wind distribution pipe are simultaneously opened or closed, the flow speed of the oxidation wind spray holes is controlled within the range of 20-40 m/s, and the residence time of oxidation wind in slurry of the desulfurizing tower is ensured.
According to the technical scheme, when the total air supply quantity of the oxidation air system is larger than the air supply quantity under the full-load working condition, the reasonable air speed of spray holes of the oxidation air distribution pipes in the tower can be maintained by adjusting the opening quantity of the isolation valves of the branch pipes outside the tower, so that the stay time of oxidation air in the tower is ensured, and the oxidation effect of slurry is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a distribution structure of an oxidized wind distribution pipe according to an embodiment of the present invention;
FIG. 3 is a schematic view of a single oxidized wind distribution pipe according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of an oxidized wind distributing pipe according to an embodiment of the present invention;
In the figure: the device comprises a 1-desulfurizing tower, a 2-oxidation fan, a 3-main pipe safety valve, a 4-main pipe isolation valve, a 5-spray cooling device, a 6-process water automatic isolation valve and a 7-branch pipe isolation valve;
8-oxidation wind distribution pipes, 8-1-oxidation wind distribution sections, 8-2-tower wall connection sections, 8-3-oxidation wind interfaces, 8-4-overhaul interfaces, 8-5-liquid seals, emptying pipes and 8-6-oxidation wind spray holes;
9-slurry isolating valve, 10-process water flushing valve, 11-ORP measuring box, 12-ORP measuring instrument, 13-branch pipeline, 14-air volume measuring instrument, 15-slurry pipeline and 16-process water pipeline; 17-a main pipe of the fan outlet.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in figures 1-4 of the drawings,
The flue gas desulfurization and oxidation wind system comprises an ORP online measurement system and an oxidation wind supply system, wherein the ORP online measurement system comprises an ORP measurement box 11 and an ORP measurement instrument 12, the ORP measurement instrument 12 is arranged at the top of the ORP measurement box 11, and an overflow port is arranged on the ORP measurement box 11; the ORP measuring box 11 is connected with the desulfurizing tower through a slurry pipeline 15, a slurry isolating valve 9 is arranged on the slurry pipeline 15, slurry in the desulfurizing tower 1 enters the ORP measuring box 11 through the slurry pipeline 15 and the slurry isolating valve 9, the ORP measuring instrument 12 measures the ORP value (oxidation-reduction potential) of the slurry in real time, and the slurry is discharged to a trench or pit through an overflow port of the ORP measuring box 11.
The ORP online measurement system is connected with an automatic process water flushing device, the automatic process water flushing device comprises a flushing pipeline and a process water flushing valve 10, one end of the flushing pipeline is connected with a process water pipeline 16, the other end of the flushing pipeline is connected with a slurry pipeline 15, and the process water flushing valve 10 is arranged on the flushing pipeline. The ORP measuring box 11, the ORP measuring instrument 12 and the slurry pipeline 15 of the ORP online measuring system are regularly flushed through the automatic flushing device for the process water, the slurry isolating valve 9 is firstly closed during flushing, the process water flushing valve 10 is then opened, and after flushing, the process water flushing valve 10 is firstly closed and the slurry isolating valve 9 is then opened. When ORP measurements are made, the process water flush valve 10 is closed and the slurry isolation valve 9 is opened.
The oxidation wind supply system comprises an oxidation fan 2, the oxidation fan 2 adopts a variable frequency to adjust a high-speed centrifugal fan, an air outlet of the oxidation fan 2 is connected with a main fan outlet pipe 17, the main fan outlet pipe 17 is connected with a plurality of branch pipes 13, branch pipe isolation valves 7 are arranged on the branch pipes 13, and the branch pipes 13 are connected with an oxidation wind distribution pipe 8 positioned in the desulfurization tower 1.
The main pipe 17 of the fan outlet is provided with an air volume measuring instrument 14, and the air volume measuring instrument 14 is used for monitoring the air volume of oxidized air. And a main pipe safety valve 3 and a main pipe isolation valve 4 are further arranged on the main pipe 17 at the outlet of the fan, and the main pipe safety valve 3 is used for over-pressure emptying of a pipeline.
The outlet air temperature of the oxidation fan 2 is about 100-150 ℃, so a spraying cooling device 5 is arranged on a main pipe 17 at the outlet of the fan, a nozzle is arranged in the spraying cooling device 5, water is supplied from a process water pipeline, and an automatic process water isolation valve 6 is arranged on the process water pipeline. In the embodiment, the process water used for the spray cooling device and the process water used for flushing the ORP measuring system can be provided by a process water pump of a desulfurization system and led to be connected with an outlet pipeline of the process water pump.
The oxidized wind after water spray cooling enters the oxidized wind distributing pipe 8 in the desulfurizing tower through the branch pipe 13, the oxidized wind distributing pipe 8 is arranged at a certain height below the liquid level in the desulfurizing tower 1, the single oxidized wind distributing pipe 8 adopts bilateral air inlet, the branch pipe 13 is provided with the branch pipe isolation valve 7, and the branch pipe isolation valve 7 is used for isolating the oxidized wind entering the tower.
As shown in fig. 2-4, the oxidation wind distribution pipe 8 comprises an oxidation wind distribution section 8-1 and a tower wall connection section 8-2, wherein oxidation wind spray holes 8-6 are arranged on the oxidation wind distribution section 8-1, the oxidation wind spray holes 8-6 are arranged in the bottom direction of the oxidation wind distribution section 8-1 and are positioned at two sides of the vertical central line of the oxidation wind distribution section 8-1, the direction of the oxidation wind spray holes 8-6 is inclined downwards, and the included angle between the central line of the oxidation wind spray holes 8-6 and the vertical central line of the oxidation wind distribution section 8-1 is 20-60 degrees;
The tower wall connecting section 8-2 is welded and fixed with the tower wall of the desulfurizing tower 1, and the tower wall connecting section 8-2 is used for connecting the outside of the tower with the inside oxidation wind pipeline, so that the overhaul and the maintenance of the inside and outside oxidation wind pipelines are convenient; the tower wall connecting section 8-2 is provided with an oxidation wind interface 8-3 and an overhaul interface 8-4, and the oxidation wind distributing section 8-1 is connected with a liquid seal and an emptying pipe 8-5. The oxidation wind interface 8-3 is used for connecting an oxidation wind pipeline outside the tower, the overhaul interface 8-4 is used for overhauling and maintaining the oxidation wind pipeline inside the tower after the shutdown, the blocked oxidation wind pipeline inside the tower can be cleaned under the condition that the oxidation wind pipeline inside the tower is not removed, and the interface is blocked by a flange cover during normal operation.
When in desulfurization operation, the number of the opened oxidation fans is determined according to the sulfur dioxide concentration measured by a desulfurization inlet CEMS and the flue gas flow measured by a flue gas flowmeter, coarse adjustment of the oxidation air quantity is carried out, under the condition that the concentration of the sulfur dioxide in the inlet flue gas and the flue gas quantity are not changed greatly, the required quantity of the oxidation air quantity is not changed greatly, the number of the operated oxidation fans is kept unchanged, the air quantity requirement can be determined according to the ORP (oxidation reduction potential) measured by an ORP online measurement system, the air quantity adjustment can be finely adjusted through fan variable frequency adjustment, and the accurate adjustment of the oxidation air quantity required by desulfurization slurry is met.
The oxidation wind after spray cooling enters the oxidation wind distribution pipes 8 in the tower from the two sides of the desulfurization tower 1 through the branch pipes 13, the oxidation wind is uniformly sprayed through the oxidation wind spray holes 8-6 arranged on the oxidation wind distribution section 8-1, the opening quantity of the branch pipe isolation valves 7 on the branch pipes 13 is adjusted according to the change of the total wind quantity (the branch pipe isolation valves 7 on the two sides of the oxidation wind distribution pipes 8 in the same tower are simultaneously opened and closed) so as to ensure that the flow velocity of the oxidation wind passing through the oxidation wind spray holes 8-6 is in a reasonable range, the flow velocity of the oxidation wind spray holes 8-6 is controlled in a range of 20-40 m/s, and the residence time of the oxidation wind in slurry of the desulfurization tower is ensured.
The invention adopts the on-line real-time measurement of the oxidation-reduction potential (ORP for short) of the desulfurization slurry as the control index of the desulfurization system for controlling the oxidation-reduction reaction, adjusts the air quantity required by the slurry oxidation according to the ORP monitoring value, adopts the frequency conversion adjustment centrifugal fan (magnetic suspension type or air suspension type) and the adjustable double-side air inlet oxidation air distribution mode for adjusting the air quantity, ensures the uniform distribution of oxidation air in the tower and ensures the oxidation effect of the slurry. The oxidation rate of the gypsum slurry is fed back through gypsum component analysis, and the corresponding relation between the ORP value and the excessive oxidation wind coefficient under the condition of meeting the slurry oxidation rate is established through a large amount of operation data, so that the self-adaptive optimization operation of the oxidation wind system is determined according to the operation big data.
The desulfurization system determines the required oxidation air quantity according to the combination mode of the desulfurization inlet flue gas flow, the inlet flue gas sulfur dioxide concentration and the ORP value of the slurry ORP measurement system, the air quantity of the fans can be adjusted by operating the number of the fans and adjusting the frequency conversion of the fans, and the fine adjustment of the oxidation air quantity is carried out according to the ORP value of the slurry, so that the oxidation effect of the slurry is ensured, the operation power consumption of the oxidation fans can be reduced, and the operation cost is saved.
Considering the corrosiveness and abrasion of slurry in the tower, the oxidation wind distribution pipe in the tower is generally made of alloy materials, and adopts a two-side air inlet mode, so that the pipe diameter of the oxidation wind distribution pipe in the tower can be reduced under the condition of the same air quantity, and the consumption of alloy oxidation wind pipelines in the tower is reduced; meanwhile, by adopting a two-side air inlet mode, the flow path length difference of the oxidation air sprayed by each spray hole of the oxidation air distribution pipe in the tower is smaller, the air output of each spray hole is more uniform, and the uniform distribution of the oxidation air in the desulfurization tower is ensured.
When the total air supply quantity of the oxidation air system is larger than the air supply quantity under the full-load working condition, the reasonable air speed of the spray holes of the oxidation air distribution pipe in the tower can be maintained by adjusting the opening quantity of the branch pipe isolation valves outside the tower, so that the stay time of oxidation air in the tower is ensured, and the oxidation effect of slurry is ensured.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The use method of the flue gas desulfurization and oxidation wind system is characterized in that the flue gas desulfurization and oxidation wind system is adopted, the flue gas desulfurization and oxidation wind system comprises an ORP online measurement system and an oxidation wind supply system, the ORP online measurement system comprises an ORP measurement box and an ORP measurement instrument, the ORP measurement instrument is arranged at the top of the ORP measurement box, an overflow port is arranged on the ORP measurement box, and the ORP measurement box is connected with a desulfurizing tower through a slurry pipeline; the oxidation wind supply system comprises an oxidation fan, an air outlet of the oxidation fan is connected with a main pipe of a fan outlet, the main pipe of the fan outlet is connected with a plurality of branch pipes, branch pipe isolation valves are arranged on the branch pipes, the branch pipes are connected with an oxidation wind distribution pipe positioned in the desulfurization tower, and a plurality of oxidation wind spray holes are arranged on the oxidation wind distribution pipe;
The application method of the flue gas desulfurization and oxidation wind system comprises the following steps:
s1, determining the number of opened oxidation fans according to the concentration of sulfur dioxide and the flow rate of flue gas, performing rough adjustment on the oxidation air quantity, and under the condition that the concentration of sulfur dioxide in inlet flue gas and the flow rate of flue gas are not changed greatly, keeping the number of the operated oxidation fans unchanged, wherein the air quantity requirement can be determined according to the oxidation-reduction potential measured by the ORP online measurement system, and the air quantity adjustment can be performed through fan frequency conversion adjustment to realize fine adjustment so as to meet the accurate adjustment of the oxidation air quantity required by desulfurization slurry;
s2, oxidizing air enters the oxidizing air distribution pipes in the desulfurizing tower from two sides of the desulfurizing tower through the branch pipes, the oxidizing air is uniformly sprayed through the oxidizing air spray holes arranged on the oxidizing air distribution pipes, and the opening quantity of the branch pipe isolation valves on the branch pipes is adjusted according to the change of the total air quantity so as to ensure that the flow velocity of the oxidizing air passing through the oxidizing air spray holes is in a reasonable range.
2. The method of using a flue gas desulfurization and oxidation wind system according to claim 1, wherein a slurry isolation valve is arranged on the slurry pipeline.
3. The method of using a flue gas desulfurization and oxidation wind system according to claim 1, wherein the ORP online measurement system is connected with an automatic process water flushing device, the automatic process water flushing device comprises a flushing pipeline and a process water flushing valve, one end of the flushing pipeline is connected with a process water pipeline, the other end of the flushing pipeline is connected with the slurry pipeline, and the flushing pipeline is provided with the process water flushing valve.
4. The method for using a flue gas desulfurization and oxidation wind system according to claim 1, wherein the oxidation fan is a variable-frequency adjustment high-speed centrifugal fan.
5. The method for using the flue gas desulfurization and oxidation wind system according to claim 1, wherein the wind volume measuring instrument is installed on the main pipe of the outlet of the fan.
6. The method of claim 5, wherein a main pipe safety valve and a main pipe isolation valve are further arranged on the main pipe of the fan outlet.
7. The method of claim 6, wherein a shower cooling device is provided on the main pipe of the fan outlet.
8. The method of claim 1, wherein the oxidizing air distribution pipe comprises an oxidizing air distribution section and a tower wall connection section, the tower wall connection section is welded and fixed with the tower wall of the desulfurizing tower, an oxidizing air interface and an overhauling interface are arranged on the tower wall connection section, the oxidizing air distribution section is connected with a liquid seal and an emptying pipe, and the oxidizing air spray holes are arranged on the oxidizing air distribution section.
9. The method for using a flue gas desulfurization and oxidation wind system according to claim 1, wherein the branched pipe isolation valves on both sides of the same oxidation wind distribution pipe are opened or closed at the same time, the flow rate of the oxidation wind spray holes is controlled within the range of 20-40 m/s, and the residence time of oxidation wind in slurry of a desulfurization tower is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310417162.4A CN116422118B (en) | 2023-04-18 | 2023-04-18 | Flue gas desulfurization and oxidation wind system and application method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310417162.4A CN116422118B (en) | 2023-04-18 | 2023-04-18 | Flue gas desulfurization and oxidation wind system and application method thereof |
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| CN116422118A CN116422118A (en) | 2023-07-14 |
| CN116422118B true CN116422118B (en) | 2024-07-23 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06254344A (en) * | 1993-03-05 | 1994-09-13 | Mitsubishi Heavy Ind Ltd | Flue gas desulfurization equipment |
| CN101829490A (en) * | 2010-05-14 | 2010-09-15 | 上海龙净环保科技工程有限公司 | Oxygen supply pipe device for wet flue gas desulfurization oxidation |
| CN205650049U (en) * | 2016-04-01 | 2016-10-19 | 大唐环境产业集团股份有限公司 | Wet flue gas desulfurization pH value monitoring system |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3829215A1 (en) * | 1988-08-29 | 1990-03-08 | Uhde Gmbh | REACTOR FOR CARRYING OUT CATALYTIC GAS REACTIONS WITH A PRESSURE-RESISTANT SHEATH AND ONE BALL BOTTOM ON THE FRONT OUTER EDGE |
| KR100262903B1 (en) * | 1995-02-28 | 2000-08-01 | 가노 다다마사 | Wet-type gas desulfurization plant and method making use of a solid desulfurizing agent |
| JP3150615B2 (en) * | 1996-06-28 | 2001-03-26 | 三菱重工業株式会社 | Oxidation control method in flue gas desulfurization treatment |
| JP3836048B2 (en) * | 2002-05-24 | 2006-10-18 | 三菱重工業株式会社 | Wet flue gas desulfurization method and apparatus |
| CN102000489A (en) * | 2010-11-24 | 2011-04-06 | 东北电力科学研究院有限公司 | Thermal power plant wet desulfurization agent and its desulfurization method |
| CN103521144B (en) * | 2013-10-23 | 2016-04-20 | 中冶长天国际工程有限责任公司 | A kind of system and method for oxidative salting liquid |
| KR102047196B1 (en) * | 2015-07-23 | 2019-11-20 | 미츠비시 히타치 파워 시스템즈 가부시키가이샤 | Wet type flue gas desulfurization device and method for operating wet type flue gas desulfurization device |
| CN109092045B (en) * | 2018-10-11 | 2020-07-21 | 华北电力大学（保定） | A kind of limestone-gypsum method flue gas desulfurization slurry oxidation control method |
| CN112883553B (en) * | 2021-01-21 | 2022-05-17 | 浙江大学 | Oxidation fan operation optimization method of single-tower double-circulation desulfurization device |
| CN216458041U (en) * | 2021-03-24 | 2022-05-10 | 辽宁富山水泥有限公司 | Rotary cement kiln tail gas denitration aqueous ammonia injection apparatus |
| CN113398750A (en) * | 2021-07-08 | 2021-09-17 | 西安钧泰环保设备工程有限公司 | Desulfurizing tower thick liquid pond subregion oxidation unit |
| CN217662489U (en) * | 2022-04-06 | 2022-10-28 | 新疆海天祥瑞环保工程有限公司 | Oxidation air pipe network for desulfurizing tower |
| CN115121099A (en) * | 2022-07-14 | 2022-09-30 | 西安热工研究院有限公司 | Integrated online control desulfurization slurry oxidation and wastewater discharge device and method |
| CN115933559A (en) * | 2022-12-07 | 2023-04-07 | 浙江天地环保科技股份有限公司 | A desulfurization variable frequency centrifugal oxidation fan energy saving optimization control system and method |
-
2023
- 2023-04-18 CN CN202310417162.4A patent/CN116422118B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06254344A (en) * | 1993-03-05 | 1994-09-13 | Mitsubishi Heavy Ind Ltd | Flue gas desulfurization equipment |
| CN101829490A (en) * | 2010-05-14 | 2010-09-15 | 上海龙净环保科技工程有限公司 | Oxygen supply pipe device for wet flue gas desulfurization oxidation |
| CN205650049U (en) * | 2016-04-01 | 2016-10-19 | 大唐环境产业集团股份有限公司 | Wet flue gas desulfurization pH value monitoring system |
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