CN213286314U - Desulfurization and denitrification integrated system based on gas-phase oxidant and fixed bed - Google Patents
Desulfurization and denitrification integrated system based on gas-phase oxidant and fixed bed Download PDFInfo
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- CN213286314U CN213286314U CN202021949236.7U CN202021949236U CN213286314U CN 213286314 U CN213286314 U CN 213286314U CN 202021949236 U CN202021949236 U CN 202021949236U CN 213286314 U CN213286314 U CN 213286314U
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Abstract
The utility model discloses a SOx/NOx control integration system based on gaseous phase oxidant and fixed bed. This SOx/NOx control integration system includes: the pre-dedusting device is used for forming the raw flue gas into pre-treated flue gas; the flue gas pipeline is connected with the pre-dedusting device, and the pre-treated flue gas forms oxidized flue gas in the flue gas pipeline; the fixed bed absorption tower is provided with an oxidized flue gas inlet, a desulfurization and denitrification agent inlet and a byproduct outlet; the oxidized flue gas inlet is connected with a flue gas pipeline; a desulfurization and denitrification agent supply device which is connected with the desulfurization and denitrification agent inlet and supplies desulfurization and denitrification agent particles into the fixed bed absorption tower; and the byproduct storage device is respectively connected with the byproduct outlet and the desulfurization and denitrification agent supply device. This SOx/NOx control integrated system is favorable to the recycle of SOx/NOx control agent.
Description
Technical Field
The utility model relates to a SOx/NOx control integration system based on gaseous phase oxidant and fixed bed.
Background
SO2And NOxIs an important cause of photochemical contamination and acid rain. Thus, SO in the flue gas is removed2And NOxIs very necessary.
CN107596908A discloses a method for treating flue gas by using a fixed bed reactor, wherein flue gas to be treated is subjected to pre-dedusting to remove most of dust particles, so that the dust content is 10-30 mg/Nm3Pre-dedusting flue gas; contacting the pre-dedusting flue gas with a desulfurization and denitrification treatment agent in a fixed bed reactor to form desulfurization and denitrification flue gas; the desulfurization and denitrification treatment agent is granular, honeycomb or flat and is prepared from raw materials comprising 70-90 parts by weight of nano calcium oxide, 5-15 parts by weight of nano silicon dioxide, 3-10 parts by weight of nano vanadium pentoxide and 2-10 parts by weight of nano iron oxide; and separating the desulfurization and denitrification flue gas in dust removal equipment to obtain purified flue gas. In the method, the flue gas is subjected to desulfurization and denitrification treatment without oxidation, the used desulfurization and denitrification treating agent is nano oxide, the manufacturing cost is high, and the patent does not relate to desulfurization and denitrification equipment.
CN206168171U discloses a high-temperature flue gas desulfurization, denitrification, demercuration and dust removal integrated device, which includes a desulfurization and demercuration agent storage tank, a fixed bed membrane reactor and an ammonia storage tank, wherein the fixed bed membrane reactor includes a casing with an inverted cone-shaped lower end, an air collection chamber is arranged at the upper end in the casing, an air inlet chamber is arranged at the lower end in the casing, a membrane separator, a gas distributor and a denitration reactor are sequentially arranged between the air inlet chamber and the air collection chamber inside the casing from bottom to top, a gas inlet is arranged on the casing of the air inlet chamber, a desulfurization and demercuration agent is arranged in the desulfurization and demercuration agent storage tank, the desulfurization and demercuration agent storage tank is connected with the gas inlet through a pipeline, a gas outlet is arranged at the upper end of the air collection chamber, the ammonia. The method is easy to cause the phenomenon of ammonia escape, thereby causing secondary pollution.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a SOx/NOx control integration system based on gaseous phase oxidant and fixed bed, this system are favorable to the recovery of SOx/NOx control agent, reduce SOx/NOx control cost, have higher SOx/NOx control efficiency.
The utility model provides a SOx/NOx control integration system based on gaseous phase oxidant and fixed bed, it includes:
the flue gas pipeline is connected with the pre-dedusting device; the flue gas pipeline is internally provided with an oxidizing gas uniform distributor which is used for distributing oxidizing gas containing chlorine dioxide into the flue gas pipeline, and the pretreated flue gas is contacted with the oxidizing gas in the flue gas pipeline to form oxidized flue gas;
the fixed bed absorption tower is provided with an oxidized flue gas inlet, a desulfurization and denitrification agent inlet and a byproduct outlet; the oxidized flue gas inlet is connected with the flue gas pipeline, and the oxidized flue gas is conveyed to the fixed bed absorption tower through the flue gas pipeline;
a desulfurization and denitrification agent supply device which is connected with the desulfurization and denitrification agent inlet and is used for supplying desulfurization and denitrification agent particles into the fixed bed absorption tower; forming clean flue gas and byproducts containing desulfurization and denitrification agent ash residues in the oxidized flue gas and the desulfurization and denitrification agent particles in a fixed bed absorption tower;
and the byproduct storage device is respectively connected with the byproduct outlet and the desulfurization and denitrification agent supply device and is used for receiving the byproducts which are generated in the fixed bed absorption tower and contain the desulfurization and denitrification agent ash slag and supplying the desulfurization and denitrification agent ash slag to the desulfurization and denitrification agent supply device for recycling.
According to the utility model discloses a SOx/NOx control integrated system, preferably, SOx/NOx control agent feeding device is provided near SOx/NOx control agent entry, and it is used for adding SOx/NOx control agent granule to fixed bed absorption tower;
a byproduct discharging device is arranged near the byproduct outlet and used for discharging the byproducts containing desulfurization and denitrification agent ash in the fixed bed absorption tower out of the byproduct storage device;
a desulfurization and denitrification agent particle distributor is arranged in the fixed bed absorption tower and is used for distributing desulfurization and denitrification agent particles in the fixed bed absorption tower;
and an air flow distribution device is arranged in the fixed bed absorption tower and is used for distributing the oxidized flue gas in the fixed bed absorption tower.
According to the utility model discloses a SOx/NOx control integration system, preferably, SOx/NOx control integration system still includes delivery pump and vibratory feeder, SOx/NOx control agent entry with SOx/NOx control agent feeding device passes through the delivery pump and the vibratory feeder links to each other.
According to the utility model discloses a SOx/NOx control integrated system, preferably, SOx/NOx control agent feeding device includes ball-milling equipment, kneading machine, screw extrusion granulator and drying-machine;
the ball milling equipment is connected with the byproduct storage device and is used for grinding and mixing the desulfurization and denitrification agent raw material and the desulfurization and denitrification agent ash from the byproduct storage device to obtain a mixture;
the kneader is connected with the ball milling equipment and is used for kneading the mixture into wet materials;
the screw extrusion granulator is connected with the kneader and is used for forming wet materials into material particles;
the dryer is connected with the screw extrusion granulator and is used for drying the material particles to obtain the desulfurization and denitrification agent particles.
According to the utility model discloses a SOx/NOx control integrated system, preferably, the SOx/NOx control agent feeding device still includes SOx/NOx control agent raw materials storage silo;
the desulfurization and denitrification agent raw material storage bin is connected with the ball milling equipment and is used for supplying desulfurization and denitrification agent raw materials to the ball milling equipment.
According to the utility model discloses a SOx/NOx control integrated system, preferably, SOx/NOx control agent raw materials storage silo includes first storage silo and second storage silo;
the first storage bin is connected with the ball milling equipment through first metering equipment and is used for supplying desulfurization and denitrification agent raw materials to the ball milling equipment; the first storage bin is respectively connected with the calcium oxide supply equipment, the fly ash supply equipment and the steel slag supply equipment;
the second storage bin is connected with the ball milling equipment through second metering equipment and is used for supplying desulfurization and denitrification agent raw materials to the ball milling equipment; and the second storage bin is respectively connected with the adhesive supply device, the pore-forming agent supply device and the oxidant supply device.
According to the utility model discloses a SOx/NOx control integrated system, preferably, SOx/NOx control integrated system still includes oxidizing gas feeding device;
the oxidizing gas supplying device is connected with the oxidizing gas distributor and is used for supplying oxidizing gas containing chlorine dioxide to the oxidizing gas distributor.
According to the utility model discloses a SOx/NOx control integrated system, preferably, oxidizing gas supply device includes chlorine dioxide generator, dilution fan and raw materials supply apparatus;
the chlorine dioxide generator is provided with a raw material inlet, a dilution air inlet and an oxidizing gas outlet, and the oxidizing gas outlet is connected with the oxidizing gas uniform distributor; the chlorine dioxide generator is used for generating chlorine dioxide gas from reaction raw materials and mixing the chlorine dioxide gas with dilution air to form oxidizing gas containing chlorine dioxide;
the dilution fan is connected with the dilution air inlet and is used for supplying dilution air to the chlorine dioxide generator;
the raw material supply device is connected with the raw material inlet and is used for supplying reaction raw materials to the chlorine dioxide generator.
According to the utility model discloses a SOx/NOx control integration system, preferably, raw materials supply apparatus includes first solution storage tank, second solution storage tank and third solution storage tank;
the first solution storage tank is connected with the raw material inlet and is used for supplying a sodium chlorate solution to the chlorine dioxide generator;
the second solution storage tank is connected with the raw material inlet and is used for supplying hydrogen peroxide solution to the chlorine dioxide generator;
the third solution storage tank is connected to the feed inlet for supplying a dilute sulfuric acid solution to the chlorine dioxide generator.
According to the utility model discloses a SOx/NOx control integrated system, preferably, SOx/NOx control integrated system still includes the draught fan; the pre-dedusting device is connected with the flue gas pipeline through an induced draft fan, and the induced draft fan is used for introducing the pre-treated flue gas into the flue gas pipeline;
the fixed bed absorption tower is provided with a clean flue gas outlet, and the clean flue gas outlet is connected with a chimney and used for discharging clean flue gas out of the fixed bed absorption tower.
The utility model discloses a SOx/NOx control integration system adopts the fixed bed absorption tower, and it is favorable to the recovery of SOx/NOx control agent to recycle, reduces SOx/NOx control cost. The utility model discloses a SOx/NOx control integration system has higher desulfurization efficiency and denitration efficiency.
Drawings
Fig. 1 is the utility model discloses a SOx/NOx control integration system's based on gaseous phase oxidant and fixed bed structure schematic diagram.
The reference numerals are detailed below:
1-a draught fan; 2-oxidizing gas uniform distributor; 3-oxidizing gas supply means; 4-fixed bed absorption tower; 5-a byproduct storage device; 6-a desulfurization and denitrification agent supply device; 7-a chimney; 8-a pre-dust removal device.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
The utility model discloses a SOx/NOx control integration system based on gaseous phase oxidant and fixed bed, including dust collector, flue gas pipeline, fixed bed absorption tower, SOx/NOx control agent feeding device and accessory substance storage device in advance. In some embodiments, the integrated desulfurization and denitrification system may further include an oxidizing gas supply device.
< dust removing apparatus in advance >
The utility model discloses a dust collector links to each other with flue gas pipeline in advance, and it is used for removing dust the processing with former flue gas, forms the preliminary treatment flue gas. The pre-dust removal device may be an electrostatic precipitator. In some embodiments, the integrated system for desulfurization and denitrification further comprises an induced draft fan; the pre-dedusting device is connected with the flue gas pipeline through an induced draft fan.
< flue gas duct >
The flue gas pipeline is respectively connected with the pre-dedusting device and the fixed bed absorption tower. The flue gas pipeline is internally provided with an oxidizing gas uniform distributor which is used for uniformly distributing oxidizing gas containing chlorine dioxide in the flue gas pipeline. The pretreated flue gas is contacted with oxidizing gas in the flue gas pipeline to form oxidized flue gas. In certain embodiments, the oxidizing gas sparger is connected to the oxidizing gas supply means.
< fixed bed absorption column >
The fixed bed absorption tower is provided with an oxidized flue gas inlet. The post-oxidation flue gas inlet may be disposed at a lower portion of the fixed bed absorption tower. And the oxidized flue gas inlet is connected with a flue gas pipeline, and the oxidized flue gas is conveyed to the fixed bed absorption tower through the flue gas pipeline. And an airflow distribution device is arranged in the fixed bed absorption tower and is used for distributing the oxidized flue gas in the fixed bed absorption tower.
The fixed bed absorption tower is provided with a desulfurization and denitrification agent inlet. The desulfurization and denitrification agent inlet can be arranged at the upper part of the fixed bed absorption tower. A desulfurization and denitrification agent feeding device can be arranged near the desulfurization and denitrification agent inlet. The desulfurization and desulfurization agent particles enter the fixed bed absorption tower through the desulfurization and denitrification agent inlet. The fixed bed absorption tower can be internally provided with a desulfurization and denitrification agent particle distributor which is used for distributing desulfurization and denitrification agent particles in the fixed bed absorption tower. The oxidized flue gas and the desulfurization and denitrification agent particles form clean flue gas and byproducts containing desulfurization and denitrification agent ash in a fixed bed absorption tower.
The fixed bed absorption tower is provided with a byproduct outlet. The byproduct outlet may be provided at the bottom of the fixed-bed absorption column. The byproduct outlet is connected with a byproduct storage device. And the byproduct outlet is used for discharging the generated byproduct containing desulfurization and denitrification agent ash out of the fixed bed absorption tower.
The fixed bed absorption tower can also be provided with a clean flue gas outlet. The clean flue gas outlet may be disposed at the top of the fixed bed absorption tower, which discharges the clean flue gas out of the fixed bed absorption tower. In certain embodiments, the clean flue gas outlet is connected to a chimney.
< desulfurization/denitration agent supply apparatus >
The utility model discloses a SOx/NOx control agent feeding device links to each other with SOx/NOx control agent entry, and it is used for supplying SOx/NOx control agent granule in to the fixed bed absorption tower. In some embodiments, the desulfurization and denitrification agent supply device is connected with the desulfurization and denitrification agent supply device through a delivery pump and a vibration feeder.
The utility model discloses a SOx/NOx control agent feeding device can include ball-milling equipment, kneading machine, screw extrusion granulator and drying-machine. In certain embodiments, the SOx supply device may further comprise one or more of a SOx feed storage bin and/or a SOx particulate storage bin.
The ball milling equipment is connected with the byproduct storage device and is used for grinding and mixing the desulfurization and denitrification agent raw material and the desulfurization and denitrification agent ash from the byproduct storage device to obtain a mixture. The raw materials comprise calcium oxide, fly ash and steel slag. The raw materials may also contain additives such as binders (water glass), pore formers (copper carbonate) and oxidizers (iron oxide). The ball milling device may be a ball mill.
A kneader is connected to the ball mill apparatus for kneading the mixture into a wet mass. The mixture is kneaded with water in a kneader to form a wet mass.
A screw extrusion granulator is connected to a kneader, which is used to form the wet material into material particles.
The dryer is connected with the screw extrusion granulator and is used for drying the material particles to obtain the desulfurization and denitrification agent particles. The dryer may be a mesh belt dryer.
The sulfur denitration agent raw material storage bin is connected with the ball milling equipment and is used for supplying the sulfur denitration agent raw materials to the ball milling equipment. In certain embodiments, the SOx feedstock storage bins comprise a first storage bin and a second storage bin. The first storage bin is connected with the ball milling equipment through first metering equipment and is used for supplying desulfurization and denitrification agent raw materials to the ball milling equipment; the first storage bin is respectively connected with the calcium oxide supply device, the fly ash supply device and the steel slag supply device. The second storage bin is connected with the ball milling equipment through second metering equipment and is used for supplying desulfurization and denitrification agent raw materials to the ball milling equipment; and the second storage bin is respectively connected with the adhesive supply device, the pore-forming agent supply device and the oxidant supply device.
The desulfurization and denitrification agent particle storage bin is respectively connected with the dryer and the desulfurization and denitrification agent inlet, is used for storing the desulfurization and denitrification agent particles and supplying the desulfurization and denitrification agent particles to the fixed bed absorption tower.
< byproduct storage apparatus >
The utility model discloses a accessory substance storage device links to each other with accessory substance export and SOx/NOx control agent feeding device respectively, and it is arranged in receiving the accessory substance that includes SOx/NOx control agent lime-ash that generates in the fixed bed absorption tower to supply with SOx/NOx control agent lime-ash to SOx/NOx control agent feeding device reuse. In certain embodiments, a byproduct storage device is coupled to the byproduct outlet and the ball milling apparatus, respectively. The byproduct storage device may be a byproduct bin.
< oxidizing gas supply apparatus >
The oxidizing gas supply device of the utility model is connected with the oxidizing gas distributor and is used for supplying oxidizing gas containing chlorine dioxide to the oxidizing gas distributor. The oxidizing gas supply means may include a chlorine dioxide generator, a dilution fan, and a raw material supply device. The chlorine dioxide generator is provided with a raw material inlet, a dilution air inlet and an oxidizing gas outlet, and is used for generating chlorine dioxide gas from reaction raw materials and forming the chlorine dioxide gas and the dilution air into the oxidizing gas containing chlorine dioxide. The dilution fan is connected to the dilution air inlet for supplying dilution air to the chlorine dioxide generator. A raw material supply apparatus is connected to the raw material inlet for supplying the reaction raw material to the chlorine dioxide generator. The oxidizing gas outlet is connected with the oxidizing gas uniform distributor. In certain embodiments, the feedstock supply apparatus includes a first solution reservoir, a second solution reservoir, and a third solution reservoir. A first solution storage tank is connected to the feed inlet for supplying a sodium chlorate solution to the chlorine dioxide generator. A second solution storage tank is connected to the feed inlet for supplying hydrogen peroxide solution to the chlorine dioxide generator. A third solution storage tank is connected to the feed inlet for supplying a dilute sulfuric acid solution to the chlorine dioxide generator.
Example 1
Fig. 1 is the utility model discloses a SOx/NOx control integration system's based on gaseous phase oxidant and fixed bed structure schematic diagram. As shown in fig. 1, the integrated system for desulfurization and denitrification based on a gas-phase oxidant and a fixed bed of the present embodiment includes a pre-dust removal device 8, a flue gas duct, an oxidizing gas supply device 3, a fixed bed absorption tower 4, a desulfurization and denitrification agent supply device 6, a byproduct storage device 5, and a stack 7.
In the present embodiment, the pre-dust removing device 8 is an electrostatic dust remover. The pre-dust removal device 8 removes dust from the raw flue gas to form pre-treated flue gas.
The flue gas pipeline is connected with the pre-dedusting device 8 through the induced draft fan 1. The draught fan 1 introduces the pretreated flue gas into a flue gas pipeline. An oxidizing gas uniform distributor 2 is arranged in the flue gas pipeline, and the oxidizing gas uniform distributor 2 distributes oxidizing gas containing chlorine dioxide in the flue gas pipeline. The pretreated flue gas is contacted with oxidizing gas in the flue gas pipeline to form oxidized flue gas.
The oxidizing gas supply device 3 includes a first solution tank, a second solution tank, a third solution tank, a chlorine dioxide generator, and a dilution fan.
The chlorine dioxide generator is provided with a raw material inlet, a dilution air inlet and an oxidizing gas outlet. The chlorine dioxide generator is used for generating chlorine dioxide gas from the reaction raw materials and mixing the chlorine dioxide gas with the dilution air to form the oxidizing gas containing chlorine dioxide. The oxidizing gas outlet is connected to the oxidizing gas distributor 2, and the oxidizing gas containing chlorine dioxide is supplied to the oxidizing gas distributor 2.
A first solution storage tank is connected to the feed inlet and supplies a sodium chlorate solution to the chlorine dioxide generator. A second solution storage tank is connected to the feed inlet and supplies hydrogen peroxide solution to the chlorine dioxide generator. A third solution storage tank is connected to the feed inlet and supplies a dilute sulfuric acid solution to the chlorine dioxide generator.
The dilution fan is connected to the dilution air inlet and supplies dilution air to the chlorine dioxide generator.
The lower part of the fixed bed absorption tower 4 is provided with an oxidized flue gas inlet. The oxidized flue gas inlet is connected with a flue gas pipeline, and the oxidized flue gas enters the fixed bed absorption tower 4. An air flow distribution device is arranged in the fixed bed absorption tower 4 and distributes the oxidized flue gas in the fixed bed absorption tower 4. The upper part of the fixed bed absorption tower 4 is provided with a desulfurization and denitrification agent inlet. A desulfurization and denitrification agent feeding device is arranged near the desulfurization and denitrification agent inlet. The desulfurization and desulfurization agent particles enter the fixed bed absorption tower 4 through the desulfurization and denitrification agent inlet. A desulfurization and denitrification agent particle distributor is arranged in the fixed bed absorption tower 4 and distributes desulfurization and denitrification agent particles in the fixed bed absorption tower 4. The oxidized flue gas reacts with the desulfurization and denitrification agent particles in the fixed bed absorption tower 4 to form clean flue gas and byproducts containing desulfurization and denitrification agent ash.
The top of the fixed bed absorption tower 4 is provided with a clean flue gas outlet which is connected with a chimney 7. The clean oxygen is discharged to the atmosphere via a stack 7.
The bottom of the fixed bed absorption tower 4 is provided with a byproduct outlet. A byproduct discharging device is arranged near the byproduct outlet. The by-product containing the desulfurization and denitrification agent ash is discharged out of the fixed bed absorption tower 4 through the by-product outlet.
The byproduct storage device 5 is connected with the byproduct outlet and stores byproducts containing desulfurization and denitrification agent ash discharged from the byproduct outlet. The byproduct storage device 5 is a byproduct bin.
The desulfurization and denitrification agent supply device 6 comprises a first storage bin, a second storage bin, ball milling equipment, a kneading machine, a screw extrusion granulator, a dryer and a desulfurization and denitrification agent particle storage bin.
The first storage bin is connected with the ball milling equipment through first metering equipment and is used for supplying desulfurization and denitrification agent raw materials to the ball milling equipment; the first storage bin is respectively connected with the calcium oxide supply device, the fly ash supply device and the steel slag supply device. The second storage bin is connected with the ball milling equipment through second metering equipment and is used for desulfurizing and denitrifying agent raw materials to the ball milling equipment; and the second storage bin is respectively connected with the adhesive supply device, the pore-forming agent supply device and the oxidant supply device.
The ball milling equipment is connected with the byproduct storage device 5, and is used for grinding and mixing the calcium oxide, the fly ash and the steel slag from the first storage bin, the adhesive, the pore-forming agent and the oxidant of the second storage bin and the desulfurization and denitrification agent ash slag of the byproduct bin to obtain a mixture. The kneader is connected with the ball milling equipment, and the mixture and water are kneaded into wet material. A screw extrusion granulator is connected to a kneader, which forms the wet material into material particles. The dryer is connected with the screw extrusion granulator and dries the material particles to obtain the desulfurization and denitrification agent particles. The dryer is a mesh belt dryer. The desulfurization and denitrification agent particle storage bin is respectively connected with the dryer and the desulfurization and denitrification agent inlet of the fixed bed absorption tower 4 through a delivery pump and a vibration feeder, stores the desulfurization and denitrification agent particles, and supplies the desulfurization and denitrification agent particles to the fixed bed absorption tower 4.
Application example
The desulfurization and denitrification integrated system of the embodiment 1 is applied to flue gas treatment. The formula of the desulfurization and denitrification agent particles is shown in Table 1. The operation parameters of the desulfurization and denitrification integrated system are shown in Table 2. Clean smoke parameters are shown in table 3.
TABLE 1
| Raw materials | Oxidation by oxygenCalcium carbonate | Fly ash | Steel slag | Copper carbonate | Iron oxide | Water glass |
| Content (wt%) | 40 | 30 | 30 | 5 | 4 | 3 |
TABLE 2
| Parameter(s) | Numerical value | Unit of |
| Flue gas quantity at inlet of flue gas pipeline (Standard condition wet base) | 135484 | Nm3/h |
| Flue gas temperature at inlet of flue gas pipeline | 130 | ℃ |
| SO2Inlet concentration | 300 | mg/Nm3 |
| Inlet concentration of NO | 200 | mg/Nm3 |
| Moisture content of flue gas | 12 | vol％ |
| Oxygen content of flue gas | 10 | vol％ |
| Flow rate of flue gas | 4.5 | m/s |
| Residence time of flue gas | 10 | s |
| Air velocity of air absorption tower | 0.5 | m/s |
| The amount of sodium chlorate used | 53.4 | kg/h |
| The dosage of the desulfurization and denitrification agent particles | 389 | kg/h |
| Replacement period of desulfurization and denitrification agent particles | 4000 | h |
TABLE 3
| Parameter(s) | Unit of | Numerical value |
| Exhaust gas temperature | ℃ | 90 |
| Denitration efficiency | ％ | 98.2 |
| Efficiency of desulfurization | ％ | 99.1 |
The present invention is not limited to the above embodiments, and any variations, modifications, and substitutions that may occur to those skilled in the art may be made without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a SOx/NOx control integration system based on gaseous phase oxidant and fixed bed which characterized in that:
the pre-dedusting device is used for carrying out dedusting treatment on the raw flue gas to form pre-treated flue gas;
the flue gas pipeline is connected with the pre-dedusting device; the flue gas pipeline is internally provided with an oxidizing gas uniform distributor which is used for distributing oxidizing gas containing chlorine dioxide into the flue gas pipeline, and the pretreated flue gas is contacted with the oxidizing gas in the flue gas pipeline to form oxidized flue gas;
the fixed bed absorption tower is provided with an oxidized flue gas inlet, a desulfurization and denitrification agent inlet and a byproduct outlet; the oxidized flue gas inlet is connected with the flue gas pipeline, and the oxidized flue gas is conveyed to the fixed bed absorption tower through the flue gas pipeline;
a desulfurization and denitrification agent supply device which is connected with the desulfurization and denitrification agent inlet and is used for supplying desulfurization and denitrification agent particles into the fixed bed absorption tower; forming clean flue gas and byproducts containing desulfurization and denitrification agent ash residues in the oxidized flue gas and the desulfurization and denitrification agent particles in a fixed bed absorption tower;
and the byproduct storage device is respectively connected with the byproduct outlet and the desulfurization and denitrification agent supply device and is used for receiving the byproducts which are generated in the fixed bed absorption tower and contain the desulfurization and denitrification agent ash slag and supplying the desulfurization and denitrification agent ash slag to the desulfurization and denitrification agent supply device for recycling.
2. The integrated desulfurization and denitrification system according to claim 1, wherein:
a desulfurization and denitrification agent feeding device is arranged near the desulfurization and denitrification agent inlet and is used for adding desulfurization and denitrification agent particles to the fixed bed absorption tower;
a byproduct discharging device is arranged near the byproduct outlet and used for discharging the byproducts containing desulfurization and denitrification agent ash in the fixed bed absorption tower out of the byproduct storage device;
a desulfurization and denitrification agent particle distributor is arranged in the fixed bed absorption tower and is used for distributing desulfurization and denitrification agent particles in the fixed bed absorption tower;
and an air flow distribution device is arranged in the fixed bed absorption tower and is used for distributing the oxidized flue gas in the fixed bed absorption tower.
3. The integrated desulfurization and denitrification system according to claim 1, further comprising a delivery pump and a vibratory feeder, wherein the inlet for desulfurization and denitrification agent is connected to the desulfurization and denitrification agent supply device through the delivery pump and the vibratory feeder.
4. The integrated desulfurization and denitrification system according to claim 1, wherein the desulfurization and denitrification agent supply device comprises a ball milling device, a kneader, a screw extrusion granulator and a dryer;
the ball milling equipment is connected with the byproduct storage device and is used for grinding and mixing the desulfurization and denitrification agent raw material and the desulfurization and denitrification agent ash from the byproduct storage device to obtain a mixture;
the kneader is connected with the ball milling equipment and is used for kneading the mixture into wet materials;
the screw extrusion granulator is connected with the kneader and is used for forming wet materials into material particles;
the dryer is connected with the screw extrusion granulator and is used for drying the material particles to obtain the desulfurization and denitrification agent particles.
5. The integrated desulfurization and denitrification system according to claim 4, wherein the desulfurization and denitrification agent supply device further comprises a desulfurization and denitrification agent raw material storage bin;
the desulfurization and denitrification agent raw material storage bin is connected with the ball milling equipment and is used for supplying desulfurization and denitrification agent raw materials to the ball milling equipment.
6. The integrated desulfurization and denitrification system according to claim 5, wherein the raw material storage bin for the desulfurization and denitrification agent comprises a first storage bin and a second storage bin;
the first storage bin is connected with the ball milling equipment through first metering equipment and is used for supplying desulfurization and denitrification agent raw materials to the ball milling equipment; the first storage bin is respectively connected with the calcium oxide supply equipment, the fly ash supply equipment and the steel slag supply equipment;
the second storage bin is connected with the ball milling equipment through second metering equipment and is used for supplying desulfurization and denitrification agent raw materials to the ball milling equipment; and the second storage bin is respectively connected with the adhesive supply device, the pore-forming agent supply device and the oxidant supply device.
7. The integrated desulfurization and denitrification system according to claim 1, further comprising an oxidizing gas supply device;
the oxidizing gas supplying device is connected with the oxidizing gas distributor and is used for supplying oxidizing gas containing chlorine dioxide to the oxidizing gas distributor.
8. The integrated desulfurization and denitrification system according to claim 7, wherein the oxidizing gas supply device comprises a chlorine dioxide generator, a dilution fan and a raw material supply apparatus;
the chlorine dioxide generator is provided with a raw material inlet, a dilution air inlet and an oxidizing gas outlet, and the oxidizing gas outlet is connected with the oxidizing gas uniform distributor; the chlorine dioxide generator is used for generating chlorine dioxide gas from reaction raw materials and mixing the chlorine dioxide gas with dilution air to form oxidizing gas containing chlorine dioxide;
the dilution fan is connected with the dilution air inlet and is used for supplying dilution air to the chlorine dioxide generator;
the raw material supply device is connected with the raw material inlet and is used for supplying reaction raw materials to the chlorine dioxide generator.
9. The integrated desulfurization and denitrification system according to claim 8, wherein the raw material supply device comprises a first solution storage tank, a second solution storage tank, and a third solution storage tank;
the first solution storage tank is connected with the raw material inlet and is used for supplying a sodium chlorate solution to the chlorine dioxide generator;
the second solution storage tank is connected with the raw material inlet and is used for supplying hydrogen peroxide solution to the chlorine dioxide generator;
the third solution storage tank is connected to the feed inlet for supplying a dilute sulfuric acid solution to the chlorine dioxide generator.
10. The integrated desulfurization and denitrification system according to any one of claims 1 to 9, further comprising an induced draft fan;
the pre-dedusting device is connected with the flue gas pipeline through an induced draft fan, and the induced draft fan is used for introducing the pre-treated flue gas into the flue gas pipeline;
the fixed bed absorption tower is provided with a clean flue gas outlet, and the clean flue gas outlet is connected with a chimney and used for discharging clean flue gas out of the fixed bed absorption tower.
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