CN215086094U - Tire schizolysis waste gas desulfurization dust removal deNOx systems - Google Patents
Tire schizolysis waste gas desulfurization dust removal deNOx systems Download PDFInfo
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- CN215086094U CN215086094U CN202120741075.0U CN202120741075U CN215086094U CN 215086094 U CN215086094 U CN 215086094U CN 202120741075 U CN202120741075 U CN 202120741075U CN 215086094 U CN215086094 U CN 215086094U
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Abstract
The utility model relates to a tire cracking waste gas desulfurization, dust removal and denitration system, which comprises a desulfurization tower and a circulating tank, wherein a spray pipe is arranged in the desulfurization tower, the spray pipe is connected with the circulating tank through a circulating pump, the circulating tank is connected with a sodium-calcium storage tank, a regeneration tank and a sedimentation tank, the desulfurization tower is also connected with the circulating tank through a downcomer, the desulfurization tower is connected with a flue gas pipeline through an inlet at the lower end, the flue gas pipeline is connected with a draught fan and a denitration system, the denitration system comprises a liquid oxygen storage tank, a vaporizer and an ozone generator, the ozone generator is also connected with a heat exchanger, the upper end of the desulfurization tower is connected with a wet electrostatic dust removal demister through an outlet, the wet electrostatic dust removal demister is connected with the flue gas discharge, a plurality of layers of demisters are also arranged in the desulfurization tower, a flushing pipe is also connected in the desulfurization tower in cooperation with the demisters, the tire cracking waste gas desulfurization, dust removal and denitration system and the wet electrostatic dust removal demister are added on the basis of the spray tower, the desulfurization, denitration and electric precipitation operations are integrated, so that the flue gas treatment reaches the emission standard.
Description
Technical Field
The utility model relates to a flue gas processing system especially relates to a tire schizolysis waste gas desulfurization dust removal deNOx systems
Background
Tire cracking adopts natural gas as fuel to carry out combustion cracking in a tunnel kiln, and dust and SO generated in the high-temperature combustion process2Certain pollution is caused to the surrounding atmospheric environment; a sodium-calcium dual-method desulfurization system has been built originally, but the original sodium-calcium dual-method desulfurization system has the following problems:
1. the oxygen content of the flue gas is up to 19%, the oxygen content index of the flue gas of the national industry standard is only about 8.6%, and the measured data of pollutants is expanded by more than 6 times after dismantling calculation; the operation removal efficiency of the desulfurization, dust removal and denitration equipment is greatly improved;
2. the original desulfurization system is not provided with high-efficiency dust removal equipment, and the smoke and dust can not be discharged after reaching the standard;
3. the spraying layer arrangement and the spraying circulating water quantity of the original desulfurization system are small, and the desulfurization efficiency requirement cannot be met;
4. the upper part of the smoke inlet of the original desulfurizing tower is not provided with an air-equalizing plate;
5. the dewatering effect of the original desulfurizing tower outlet flue gas demister is poor;
6. the denitration equipment is not provided, and the nitrogen oxide in the flue gas can not be discharged up to the standard;
SUMMERY OF THE UTILITY MODEL
The applicant aims at the defects and carries out research and improvement to provide a tire cracking waste gas desulfurization, dedusting and denitration system.
The utility model discloses the technical scheme who adopts as follows:
the utility model provides a tire schizolysis waste gas desulfurization dust removal deNOx systems, includes desulfurizing tower and circulation pond, set up the shower in the desulfurizing tower, the shower passes through the circulating pump and is connected with the circulation pond, sodium calcium storage tank, regeneration pond and sedimentation tank are connected to the circulation pond, the desulfurizing tower still is connected with the circulation pond through the downcomer, the desulfurizing tower leans on the lower extreme to pass through the access connection flue gas pipeline, flue gas pipe connection draught fan and deNOx systems, the deNOx systems includes liquid oxygen storage tank, vaporizer and ozone generator, ozone generator still connects the heat exchanger, the desulfurizing tower upper end is through exit linkage wet-type electrostatic precipitator defroster, wet-type electrostatic precipitator connects and discharges fume still set up a plurality of layers of defroster in the desulfurizing tower, cooperation defroster still connects the flushing pipe in the desulfurizing tower.
As a further improvement of the above technical solution:
three layers of spray pipes are arranged in the desulfurizing tower, and each layer of spray pipes is connected with the circulating pool through a circulating pump.
And the lower side of the spraying pipe on the lowest side layer of the desulfurizing tower is also connected with a rotary convergence coupler.
The demister comprises a tubular demister arranged on the upper side of the uppermost layer of spray pipe in the desulfurizing tower.
The utility model discloses a desulfurization tower, including desulfurization tower, be located tubular defroster, mechanical defroster, one-level defroster and second grade defroster, the one-level defroster with the second grade defroster all includes two upper and lower mounting panels, a plurality of wavy separation blades of parallel connection between the mounting panel, be located the one-level defroster upper and lower side in the desulfurization tower and set up first flushing pipe and second flushing pipe respectively, first flushing pipe with the flushing nozzle of second flushing pipe all faces the one-level defroster, second grade defroster downside sets up the third flushing pipe, the flushing nozzle on the third flushing pipe is towards the second grade defroster, just first flushing pipe, second flushing pipe and third flushing pipe all pass through the desulfurization tower and pass through the water pump with external process water tank and be connected.
The utility model has the advantages as follows: tire schizolysis waste gas desulfurization dust removal deNOx systems increases deNOx systems and wet-type electrostatic precipitator defroster, plays denitration and electric precipitation effect, makes flue gas treatment discharge to reach standard, and the desulfurizing tower sprays the circulation water yield big, and the desulfurization is efficient, in addition, sets up the multilayer defroster, and the dehydration is effectual.
Drawings
FIG. 1 is the utility model provides a tire schizolysis waste gas desulfurization dust removal deNOx systems's flow schematic diagram.
In the figure: 1. a desulfurizing tower; 11. a shower pipe; 13. a rotary-to-convergent coupler; 14. a first flush tube; 15. a second flush tube; 16. a third flushing pipe; 2. a circulation tank; 21. a sodium-calcium storage tank; 22. a regeneration tank; 23. a sedimentation tank; 3. a flue gas duct; 31. an induced draft fan; 4. a denitration system; 41. a liquid oxygen storage tank; 42. a vaporizer; 43. an ozone generator; 5. a wet electrostatic dust collector demister; 6. a demister; 61. a tubular demister; 62. a mechanical demister; 621. a first-stage demister; 622. a secondary demister; 7. and (4) a water pump.
Detailed Description
The following describes a specific embodiment of the present embodiment with reference to the drawings.
As shown in fig. 1, the tire cracking exhaust gas desulfurization, dust removal and denitration system of the embodiment includes a desulfurization tower 1 and a circulation tank 2, three layers of spray pipes 11 are arranged in the desulfurization tower 1, the lower side of the spray pipe 11 of the lowest layer of the desulfurization tower 1 is further connected with a cyclone coupler 13, each layer of spray pipe 11 is connected with the circulation tank 2 through a circulation pump, the circulation tank 2 is connected with a sodium calcium storage tank 21, a regeneration tank 22 and a sedimentation tank 23, the desulfurization tower 1 is further connected with the circulation tank 2 through a downcomer, the lower end of the desulfurization tower 1 is connected with a flue gas pipeline 3 through an inlet, the flue gas pipeline 3 is connected with a draught fan 31 and a denitration system 4, the denitration system 4 includes a liquid oxygen storage tank 41, a vaporizer 42 and an ozone generator 43, the ozone generator 43 is further connected with a heat exchanger, the upper end of the desulfurization tower 1 is connected with a wet electrostatic dust removal demister 5 through an outlet, the wet electrostatic dust removal demister 5 is connected with a smoke removal desulfurization tower 1 and is further provided with a demister 6, the demister 6 comprises a tubular demister 61 arranged on the upper side of the uppermost layer of spray pipe 11 in the desulfurizing tower 1, a mechanical demister 62 arranged on the upper side of the tubular demister 61 in the desulfurizing tower 1, the mechanical demister 62 comprises a first-stage demister 621 and a second-stage demister 622, the first-stage demister 621 and the second-stage demister 622 both comprise an upper mounting plate and a lower mounting plate, a plurality of corrugated separation blades are connected in parallel between the mounting plates, a first flushing pipe 14 and a second flushing pipe 15 are respectively arranged on the upper side and the lower side of the first-stage demister 621 in the desulfurizing tower 1, flushing nozzles of the first flushing pipe 14 and the second flushing pipe 15 face the first-stage demister 621, a third flushing pipe 16 is arranged on the lower side of the second-stage demister 622, and a flushing nozzle on the third flushing pipe 16 faces the second-stage demister 622, and the first flushing pipe 14, the second flushing pipe 15 and the third flushing pipe 16 all penetrate through the desulfurization tower 1 to be connected with an external process water tank through a water pump 7.
When the tire cracking waste gas desulfurization, dust removal and denitration system of the embodiment is used, polluted flue gas generated by the tunnel kiln firstly enters the bag-type dust remover, most dust is removed by the dust remover and then enters the flue gas pipeline 3, meanwhile, the ozone generator 43 dissociates oxygen molecules into oxygen atoms, the oxygen atoms rapidly react with the oxygen molecules to generate ozone molecules, then the ozone molecules are sent into the flue gas pipeline 3, and insoluble low-valence nitrogen oxides are oxidized into soluble high-valence nitrogen oxides by utilizing the strong oxidizing property of ozone.
Then absorbing the nitrogen oxides in a washing tower to achieve the purpose of removing.
According to O3For the complicated oxidation reaction process of NOx, the reaction is finally reflected by the change of the valence state of N, and the main reaction is as follows:
2NO+3O3＝N2O5+3O2
2NO2+O3＝N2O5+O2
NO+O3＝NO2+O2
flue gas continues to get into desulfurizing tower 1 through the draught fan after flue gas pipeline 3 in, increases effect and the wind-sharing through the coupler soon earlier, starts the circulating pump simultaneously and sends into the shower with the absorption liquid in the circulation tank 2 to spray downwards in desulfurizing tower 1, and react with the flue gas that rises, carry out the desulfurization operation:
desulfurization process
Na2CO3+SO2→Na2SO3+CO2 (1)
2NaOH+SO2→Na2SO3+H2O (2)
Na2CO3+SO2+H2O→NaHSO3 (3)
(1) The formula is an absorption start reaction formula;
(2) the formula is a main reaction formula, and the pH value is more than 9 (when the alkalinity is higher);
(3) the formula is when the alkalinity is reduced to neutrality or even acidity (5 < pH < 9).
Namely, the absorption desulfurization operation is performed, and after the desulfurization is completed, the reacted reaction solution is discharged out of the desulfurization tower 1 and sent back to the circulation tank 2 to be subjected to the regeneration operation:
regeneration process
2NaHSO3+Ca(OH)2→Na2SO3++CaSO3↓+2H2O (5)
Na2SO3+Ca(OH)2→2NaOH+CaSO3↓ (6)
In the lime slurry (lime reaches saturation condition), neutral (amphoteric) NaHSO3 quickly reacts with lime to release Na + ], then the generated SO32 < - > continuously reacts with the lime, the calcium sulfite generated by the reaction slowly precipitates in the precipitation tank 23 in a semi-hydrated form, SO that the Na + ] is regenerated, and the absorption liquid recovers the absorption capacity of SO2 and is fed into the circulating tank 2 for recycling.
Meanwhile, the high-valence nitrogen oxides are absorbed in the desulfurization tower 1, so that the aim of denitration is fulfilled, namely, the desulfurization and denitration operations are completed in the desulfurization tower.
The flue gas continues upwards to carry in the desulfurizing tower after the SOx/NOx control, and when the flue gas flows through the defroster, the liquid drop stays on the baffle owing to inertial action to play the effect of defogging. Since the retained liquid droplets also contain solids, mainly gypsum, and thus risk scaling on the baffles, periodically operating cleaning equipment is provided, including a first flushing pipe 14, a second flushing pipe 15 and a third flushing pipe 16, wherein the flushing medium is process water, the flushing water is also used for adjusting the liquid level in the absorption tower, and after demisting is completed, the flue gas continues to rise and enters the wet electrostatic precipitator demister 5.
The wet electrostatic dust and mist eliminator 5 consists of a high-voltage electrostatic device and an electric mist eliminator body, the working principle of the wet electrostatic dust and mist eliminator is the same as that of an electrostatic dust remover, only the precipitation electrodes adopt a honeycomb tube bundle structure, and each precipitation electrode tube corresponds to a cathode corona wire; when the electrostatic precipitator works, a high-voltage electrostatic device is utilized to apply negative high-voltage electricity to a corona wire erected in the wet electrostatic precipitation demister 5, so that an uneven high-voltage electrostatic field is formed between the corona wire and a precipitation polar tube, the two electrodes are coaxially arranged, and the electric field intensity of each point in the precipitation polar tube is inversely proportional to the distance between the point and the corona wire; under the action of an electric field force, a corona region is formed in the whole precipitation pole tube, and in the corona region, high-concentration negative ions (electrons) are directed to the precipitation pole tube from a corona electrode continuously to form corona current; when smoke containing water mist, dust and other pollutants enters the precipitation pole tube, the water mist, the dust and the pollutants are charged due to collision and diffusion of ions, then the water mist, the dust and the pollutants quickly reach the inner wall of the precipitation pole tube under the action of an electric field force and release the charges at the same time, a liquid film is formed on the inner wall of the precipitation pole tube, and the liquid film, the dust and the pollutants flow into a liquid collecting tank at the lower part of the electrostatic demister to be intensively treated under the action of gravity, so that the aim of collecting fog drops, the dust and other pollutants in the smoke is fulfilled; the dust and mist removing process of the wet electrostatic dust and mist eliminator 5 can be summarized into the following four stages: ionization of gas, charging of particles such as dust mist, deposition of charged dust mist particles, and cleaning of collected dust.
After the flue gas is treated by the wet electrostatic dust removal demister 5, the flue gas can be discharged through a chimney after reaching the standard.
The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made without departing from the basic structure of the invention.
Claims (5)
1. The utility model provides a tire schizolysis waste gas desulfurization dust removal deNOx systems, includes desulfurizing tower (1) and circulation pond (2), set up spray pipe (11) in desulfurizing tower (1), spray pipe (11) are connected with circulation pond (2) through the circulating pump, sodium calcium storage tank (21), regeneration tank (22) and sedimentation tank (23) are connected in circulation pond (2), desulfurizing tower (1) still is connected its characterized in that through downcomer and circulation pond (2): desulfurizing tower (1) leans on the lower extreme to pass through access connection flue gas pipeline (3), draught fan (31) and deNOx systems (4) are connected in flue gas pipeline (3), deNOx systems (4) include liquid oxygen storage tank (41), vaporizer (42) and ozone generator (43), heat exchanger is still connected in ozone generator (43), desulfurizing tower (1) upper end is through exit linkage wet electrostatic precipitator defroster (5), wet electrostatic precipitator defroster (5) are connected and are discharged fume still set up a plurality of layers of defroster (6) in desulfurizing tower (1), cooperation defroster (6) still connect the flushing pipe in desulfurizing tower (1).
2. The desulfurization, dust removal and denitration system for the tire cracking exhaust gas as claimed in claim 1, wherein: three layers of spray pipes (11) are arranged in the desulfurizing tower (1), and each layer of spray pipes (11) is connected with the circulating pool (2) through a circulating pump.
3. The desulfurization, dust removal and denitration system for the tire cracking exhaust gas as claimed in claim 2, wherein: the desulfurizing tower (1) is located the downside of one deck shower (11) of downside and still connects and revolve convergent coupler (13).
4. The desulfurization, dust removal and denitration system for the tire cracking exhaust gas as claimed in claim 1, wherein: the demister (6) comprises a tubular demister (61) arranged on the upper side of the uppermost layer of spray pipe (11) in the desulfurizing tower (1).
5. The desulfurization, dust removal and denitration system for tire cracking exhaust gas as claimed in claim 4, wherein: the desulfurization tower is characterized in that a mechanical demister (62) is arranged on the upper side of a tubular demister (61) in a desulfurization tower (1), the mechanical demister (62) comprises a first-stage demister (621) and a second-stage demister (622), the first-stage demister (621) and the second-stage demister (622) comprise an upper mounting plate and a lower mounting plate, a plurality of corrugated baffle plates are connected in parallel between the mounting plates, a first flushing pipe (14) and a second flushing pipe (15) are respectively arranged on the upper side and the lower side of the first-stage demister (621) in the desulfurization tower (1), flushing nozzles of the first flushing pipe (14) and the second flushing pipe (15) face the first-stage demister (621), a third flushing pipe (16) is arranged on the lower side of the second-stage demister (622), flushing nozzles on the third flushing pipe (16) face the second-stage demister (622), and the first flushing pipe (14), The second flushing pipe (15) and the third flushing pipe (16) both penetrate through the desulfurizing tower (1) and are connected with an external process water tank through a water pump (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120741075.0U CN215086094U (en) | 2021-04-12 | 2021-04-12 | Tire schizolysis waste gas desulfurization dust removal deNOx systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120741075.0U CN215086094U (en) | 2021-04-12 | 2021-04-12 | Tire schizolysis waste gas desulfurization dust removal deNOx systems |
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| CN215086094U true CN215086094U (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120741075.0U Active CN215086094U (en) | 2021-04-12 | 2021-04-12 | Tire schizolysis waste gas desulfurization dust removal deNOx systems |
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| CN (1) | CN215086094U (en) |
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2021
- 2021-04-12 CN CN202120741075.0U patent/CN215086094U/en active Active
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