CN106669347B - Labyrinth type cyclone dust removal device and dust removal method - Google Patents
Labyrinth type cyclone dust removal device and dust removal method Download PDFInfo
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- CN106669347B CN106669347B CN201710070493.XA CN201710070493A CN106669347B CN 106669347 B CN106669347 B CN 106669347B CN 201710070493 A CN201710070493 A CN 201710070493A CN 106669347 B CN106669347 B CN 106669347B
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- 239000000428 dust Substances 0.000 title claims abstract description 158
- 238000000034 method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 227
- 239000007788 liquid Substances 0.000 claims abstract description 98
- 239000006260 foam Substances 0.000 claims abstract description 59
- 239000000779 smoke Substances 0.000 claims abstract description 57
- 239000004094 surface-active agent Substances 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims description 55
- 238000005406 washing Methods 0.000 claims description 52
- 239000010797 grey water Substances 0.000 claims description 25
- 239000000243 solution Substances 0.000 claims description 23
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- 238000009792 diffusion process Methods 0.000 claims description 18
- 238000010790 dilution Methods 0.000 claims description 13
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- 230000000630 rising effect Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 230000001502 supplementing effect Effects 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 abstract description 30
- 238000003860 storage Methods 0.000 abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 24
- 239000003546 flue gas Substances 0.000 abstract description 24
- 238000006477 desulfuration reaction Methods 0.000 abstract description 6
- 230000023556 desulfurization Effects 0.000 abstract description 6
- 230000001174 ascending effect Effects 0.000 description 24
- 238000004062 sedimentation Methods 0.000 description 13
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- 238000001179 sorption measurement Methods 0.000 description 7
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- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
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- 238000005345 coagulation Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 238000000889 atomisation Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- 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
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- General Chemical & Material Sciences (AREA)
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- Treating Waste Gases (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention belongs to a labyrinth cyclone dust removal device and a dust removal method; the device comprises a mechanical part and a control part, wherein the mechanical part comprises a dust removal device, an induced draft fan, a surfactant storage tank, a circulating water tank and a foam storage tank, the dust removal device comprises a shell, and a chimney, an upper-layer flushing pipeline, an upper-layer demister, a lower-layer flushing pipeline, a lower-layer demister, a settling demisting tower, a labyrinth cyclone device and an ash water chamber are arranged in the shell; the control part comprises a controller, and the signal input end of the controller is respectively connected with a flue gas flow detection sensor, a smoke concentration analyzer, a second pressure detector, a first pressure detector, a circulating water densimeter, a liquid level meter and an exhaust smoke concentration detector; has the advantages of simple structure, stable operation, investment saving, small occupied area, low operation cost and desulfurization function.
Description
Technical Field
The invention belongs to the technical field of boiler flue gas dust removal, and particularly relates to a labyrinth type cyclone dust removal device and a dust removal method.
Background
In recent years, the atmospheric pollution treatment situation of China is severe, haze weather happens frequently and shows a worsening trend, and the main factor causing haze is particulate mattersThe concentration is high, and the reason is mainly that the concentration of dust discharged in industrial production is too high. At present, the heavily-polluted atmosphere areas in China are concentrated in the northeast, northeast and China, the industries such as steel, cement, building materials, chemical engineering, electric power and papermaking are affected by uneven regional economic development, most of environment-friendly facilities are old, the efficiency is low, the modification cost is too high, and the standard-exceeding discharge phenomenon is serious. In order to reverse the current atmospheric pollution situation, the government of China definitely puts forward to gradually implement ultralow emission modification in the national range, and the emission concentration of smoke dust is not higher than 10mg/Nm 3 . The existing dust removal modes mainly comprise electrostatic dust removal, cloth bag dust removal, electrostatic-bag composite dust removal, wet electrostatic dust removal and the like, the single dust removal mode is difficult to realize the ultralow emission standard, the combined dust removal system is complex, the investment is high, the occupied area is large, the operation cost is high, the dust removal upgrading and reconstruction difficulty of the existing device is high, and the enterprise burden is heavy, so that a new dust removal technology needs to be researched urgently.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a labyrinth type cyclone dust removal device and a dust removal method which have the advantages of simple structure, stable operation, investment saving, small occupied area, low operation cost and desulfurization function.
The purpose of the invention is realized by the following steps: the device comprises a mechanical part and a control part, wherein the mechanical part comprises a dust removal device, an induced draft fan, a surfactant storage tank, a circulating water tank and a foam storage tank, the dust removal device comprises a shell, a chimney, an upper-layer flushing pipeline, an upper-layer demister, a lower-layer flushing pipeline, a lower-layer demister, a sedimentation demisting tower, a labyrinth cyclone device and a grey water chamber are sequentially arranged in the shell from top to bottom, the labyrinth cyclone device comprises a throat pipe, a spiral ascending streamline spiral shell connected with the throat pipe and an outlet diffusion pipe arranged in the middle of the top of the spiral ascending streamline spiral shell, and the outlet diffusion pipe is arranged in the sedimentation demisting tower; the bottom of the spiral rising streamline spiral shell is connected with the grey water chamber through a pore plate; the venturi premixer is connected with the inlet of the diffusion section of the venturi premixer through an induced draft fan and a gas pipeline to be dedusted, and the suction end of the venturi premixer is connected with the foam storage tank through a first tee joint; an atomization nozzle is arranged at the upper part in the spiral ascending streamline spiral shell and is connected with a surfactant storage tank through an electrostatic generator, a first filter and a second tee joint; a first liquid outlet of the cyclone dust removal device is arranged on one side of the bottom of the sedimentation demisting tower, a second liquid outlet of the cyclone dust removal device is arranged on one side of the bottom of the ash water chamber, the first liquid outlet of the cyclone dust removal device and the second liquid outlet of the cyclone dust removal device are respectively connected with a liquid inlet of the circulating water tank through pipelines, and the liquid outlet of the bottom of the circulating water tank is connected with the aftertreatment system through an adjusting valve; a liquid outlet at one side of the circulating water tank is respectively connected with a third end of the second tee joint, a third end of the first tee joint, an upper flushing pipeline and a lower flushing pipeline through a second filter and a circulating water pump; a water replenishing pipeline with a water replenishing regulating valve is arranged on a liquid replenishing port at the top of the circulating water tank; b. the control part comprises a controller, the signal input end of the controller is respectively connected with a flue gas flow detection sensor, a smoke concentration analysis instrument, a second pressure detector, a first pressure detector, a circulating water densimeter, a liquid level meter and an outer discharge smoke concentration detector, and the signal output end of the controller is respectively connected with a foam metering pump frequency converter, a dilution water regulating valve, a surfactant metering pump frequency converter, a spray water regulating valve, a first flushing water electric valve, a second flushing water electric valve, a water supplementing regulating valve and a regulating valve.
Preferably, a boiler flue gas flow detection sensor and a flue gas concentration analysis instrument are arranged between the induced draft fan and the inlet of the venturi premixer.
Preferably, a first bottom outlet valve, a foam metering pump and a foam electric valve are sequentially arranged between the foam storage tank and the first tee joint, and a foam metering pump frequency converter is arranged at the top of the foam metering pump.
Preferably, a second bottom outlet valve, a surfactant metering pump and a surfactant electric valve are sequentially arranged between the surfactant storage tank and the second tee joint, and a surfactant metering pump frequency converter is arranged at the top of the surfactant metering pump.
Preferably, a third filter and a spray water regulating valve are sequentially arranged between the circulating water pump and a third end of the second tee joint; a dilution water regulating valve is arranged between the circulating water pump and the third end of the first tee joint; a first washing water electric valve is arranged between the circulating water pump and the upper washing pipeline; and a second washing water electric valve is arranged between the circulating water pump and the lower washing pipeline.
Preferably, a first discharge valve is arranged between the first liquid discharge port of the flow dust removal device and the liquid inlet of the circulating water tank, and a second discharge valve is arranged between the second liquid discharge port of the flow dust removal device and the liquid inlet of the circulating water tank.
Preferably, the upper part of the upper layer flushing pipeline is provided with a first pressure detector, the upper part of the lower layer flushing pipeline is provided with a second pressure detector, and an exhaust smoke concentration detector is arranged in the chimney.
Preferably, inside level gauge and the circulating water densimeter of being equipped with of circulating water pond, be equipped with circulating water pond liquid outlet valve between the liquid outlet of circulating water pond and the second filter.
Preferably, the number of the spiral ascending streamline spiral shells is a plurality, and the inside of the spiral ascending streamline spiral shells is respectively provided with the atomizing nozzles.
A dust removal method of a labyrinth cyclone dust removal device comprises the following steps:
the method comprises the following steps: the method comprises the following steps that dusty smoke enters an induced draft fan, smoke flow is detected through a boiler smoke flow detection sensor on a smoke outlet flue of the induced draft fan, smoke initial concentration is detected through a smoke concentration analyzer, the addition of foam solution is automatically calculated by a controller, a foam metering pump frequency converter and a dilution water regulating valve are controlled accordingly, and the total flow of the foam solution entering a Venturi premixer is enabled to be 10.5-11.5 m 3 /h；
Step two: the dust-containing flue gas and the foam solution are fully mixed in the Venturi premixer and then enter the throat pipe, the high-speed rotation and the rising are carried out after the Venturi effect is generated to improve the kinetic energy, the dust with the diameter of more than 10 mu m is wetted, collided, agglomerated and sunk and is discharged into the dust water chamber through the bottom orifice plate, the dust in the purified gas has the diameter of less than 10 mu m, and the dust enters the settling and demisting tower through the spiral rising streamline spiral shell and the outlet diffusion pipe and is discharged into the chimney after further agglomeration, sedimentation and demisting;
step three: when the discharged smoke concentration detector detects that the discharged concentration is more than 10mg/Nm 3 And (3) controlling a frequency converter of a surfactant metering pump and a spray water regulating valve by a controller according to the detected concentration of the discharged dust and the detected flow of the flue gas in the step one to ensure that the total flow of the liquid entering the electrostatic generator is 5.2-5.5 m 3 H, generating fog drops with the same particle size as the dust through an efficient atomizing nozzle by using the electrified spray water for adsorbing the dust;
step four, collecting the grey water at the bottom of the settling and demisting tower and the grey water in the grey water chamber into a circulating water pool through a first liquid outlet and a second liquid outlet respectively, separating and precipitating the grey water, pumping the grey water out of a circulating water pump for recycling of the system, and detecting that the density of the circulating water is more than 1060kg/m by a circulating water densimeter 3 The controller controls the bottom of the circulating water tank to open the blowdown regulating valve, the liquid level meter detects the liquid level in the circulating water tank, when the liquid level drops to be less than 2.8m, the controller controls the water replenishing regulating valve to open to start water replenishing, and when the circulating water densimeter detects that the circulating water density is less than or equal to 1040kg/m 3 When the controller controls the sewage discharge regulating valve at the bottom of the circulating water tank to be closed, and when the liquid level meter detects that the liquid level in the circulating water tank rises to 3.2m, the controller controls the water supplementing regulating valve to be closed;
step five: when the controller detects that the second pressure detector at the outlet of the lower-layer demister displays pressure less than 250Pa, the electric valve of the second washing water is opened to enable the lower-layer washing pipeline to wash the lower-layer demister; when the controller detects that the pressure displayed by a second pressure detector at the outlet of the lower-layer demister is larger than 350Pa, the electric valve of second washing water is closed;
step six: when the controller detects that a first pressure detector at the outlet of the upper-layer demister displays pressure less than 100Pa, the electric valve of the first washing water is opened to enable the upper-layer washing pipeline to wash the upper-layer demister; and when the controller detects that the pressure displayed by the first pressure detector at the outlet of the upper-layer demister is larger than 200Pa, the electric valve of the first washing water is closed.
The labyrinth cyclone dust removal device and the dust removal method are manufactured according to the scheme, the dust removal device removes dust based on a distributed electrostatic adsorption principle, and specifically adopts the labyrinth cyclone device according to the particle size and the charge characteristics of dust, a foam solution is additionally added to intercept, adhere, wet and the like the dust through a Venturi premixer, a surfactant is additionally added to enable spray water to generate a charge effect through an electrostatic generator, and distributed electrostatic adsorption and sedimentation are realized in the labyrinth cyclone device and a sedimentation demisting tower; the spraying amount and the spraying concentration of the charged spraying water are intelligently adjusted according to the dust emission concentration in the waste gas, the adsorption process is accelerated by means of a gravity field generated by rotational flow, dust particles are promoted to agglomerate, sink and collect, so that the dust removal effect is realized, the purified gas can reach the ultralow emission standard through further settling and demisting at the upper part; meanwhile, the aim of removing sulfur dioxide can be fulfilled by adding a desulfurizing agent into the circulating liquid; has the advantages of simple structure, stable operation, investment saving, small occupied area, low operation cost and desulfurization function.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a view from a-a in fig. 1.
Fig. 3 is a control schematic of the present invention.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout. For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product.
As shown in fig. 1, 2 and 3, the invention relates to a labyrinth cyclone dust collector and a dust collection method, the dust collector comprises a mechanical part and a control part, a, the mechanical part comprises a dust collector, an induced draft fan 1, a surfactant storage tank 24, a circulating water tank 26 and a foam storage tank 34, the dust collector comprises a shell 6, a chimney 7, an upper flushing pipeline 10, an upper demister 43, a lower flushing pipeline 44, a lower demister 13, a settling demisting tower 8, a labyrinth cyclone device and a grey water chamber 5 are sequentially arranged in the shell 6 from top to bottom, the labyrinth cyclone device comprises a throat 33, a spiral ascending streamline spiral shell 45 connected with the throat 33 and an outlet diffusion pipe 14 arranged at the middle position of the top of the spiral ascending streamline spiral shell, and the outlet diffusion pipe 14 is arranged in the settling tower 8; the bottom of the spiral rising streamline spiral shell 45 is connected with the grey water chamber 5 through an orifice plate 54; the throat pipe 33 is connected with an outlet of a diffusion section of the Venturi premixer 4, an inlet of the Venturi premixer 4 is connected with a gas pipeline 46 to be dedusted through the induced draft fan 1, and a suction end of the Venturi premixer 4 is connected with the foam storage tank 34 through a first tee joint 47; the inner upper part of the spiral ascending streamline spiral shell 45 is provided with an atomizing nozzle 15, and the atomizing nozzle 15 is connected with a surfactant storage tank 24 through an electrostatic generator 17, a first filter 19 and a second tee joint 48; a first liquid outlet 49 of a cyclone dust removal device is arranged on one side of the bottom of the settling defogging tower 8, a second liquid outlet 50 of the cyclone dust removal device is arranged on one side of the bottom of the ash water chamber 5, the first liquid outlet 49 of the cyclone dust removal device and the second liquid outlet 50 of the cyclone dust removal device are respectively connected with a liquid inlet of the circulating water tank 26 through pipelines, and the liquid outlet at the bottom of the circulating water tank 26 is connected with an aftertreatment system 51 through an adjusting valve 27; a liquid outlet at one side of the circulating water tank 26 is respectively connected with a third end of a second tee joint 48, a third end of a first tee joint 47, the upper-layer flushing pipeline 10 and the lower-layer flushing pipeline 44 through a second filter 30 and a circulating water pump 31; a water replenishing pipeline with a water replenishing regulating valve 25 is arranged on a liquid replenishing port at the top of the circulating water tank 26;
b. the control part comprises a controller 52, signal input ends of the controller 52 are respectively connected with a flue gas flow detection sensor 2, a smoke concentration analyzer 3, a second pressure detector 9, a first pressure detector 12, a circulating water densimeter 28, a liquid level meter 29 and an exhaust smoke concentration detector 39, and signal output ends of the controller 52 are respectively connected with a foam metering pump frequency converter 35, a dilution water regulating valve 37, a surfactant metering pump frequency converter 23, a spray water regulating valve 21, a first washing water electric valve 11, a second washing water electric valve 53, a water supplementing regulating valve 25 and a regulating valve 27. And a boiler flue gas flow detection sensor 2 and a smoke concentration analysis instrument 3 are arranged between the induced draft fan 1 and the inlet of the Venturi premixer 4. A first bottom outlet valve 40, a foam metering pump 36 and a foam electric valve 38 are sequentially arranged between the foam storage tank 34 and the first tee joint 47, and the top of the foam metering pump 36 is provided with a foam metering pump frequency converter 35 connected with each other. A second bottom outlet valve 41, a surfactant metering pump 22 and a surfactant electric valve 20 are sequentially arranged between the surfactant storage tank 24 and the second tee joint 48, and a surfactant metering pump frequency converter 23 is arranged at the top of the surfactant metering pump 22. A third filter 32 and a spray water regulating valve 21 are sequentially arranged between the circulating water pump 31 and the third end of the second tee joint 48; a dilution water regulating valve 37 is arranged between the circulating water pump 31 and the third end of the first tee joint 47; a first washing water electric valve 11 is arranged between the circulating water pump 31 and the upper washing pipeline 10; a second washing water electric valve 53 is arranged between the circulating water pump 31 and the lower washing pipeline 44. A first discharge valve 16 is arranged between the first liquid discharge port 49 of the flow dust removal device and the liquid inlet of the circulating water tank 26, and a second discharge valve 18 is arranged between the second liquid discharge port 50 of the flow dust removal device and the liquid inlet of the circulating water tank 26. The upper part of the upper layer flushing pipeline 10 is provided with a first pressure detector 12, the upper part of the lower layer flushing pipeline 44 is provided with a second pressure detector 9, and the inner part of the chimney 7 is provided with an exhaust smoke concentration detector 39. The inside level gauge 29 and the circulating water density meter 28 that are equipped with of circulating water pond 26, be equipped with circulating water pond outlet valve 42 between the outlet of circulating water pond 26 and second filter 30. The spiral ascending streamline spiral shells 45 are provided with a plurality of atomizing nozzles 15 respectively inside the spiral ascending streamline spiral shells 45.
A dust removal method of a labyrinth cyclone dust removal device comprises the following steps:
the method comprises the following steps: the method comprises the following steps that dusty smoke enters an induced draft fan 1, smoke flow is detected through a boiler smoke flow detection sensor 2 on a smoke outlet flue of the induced draft fan 1, initial smoke concentration is detected through a smoke concentration analyzer 3, the addition of foam solution is automatically calculated by a controller 52, a foam metering pump frequency converter 35 and a dilution water regulating valve 37 are controlled, and the total flow of the foam solution entering a Venturi premixer 4 is 10.5-11.5 m 3 /h；
Step two: the dust-containing flue gas and the foam solution are fully mixed in the Venturi premixer 4 and then enter the throat 33, the high-speed rotation and the rising are carried out after the Venturi effect is generated to improve the kinetic energy, the dust with the diameter of more than 10 mu m is wetted, collided, agglomerated and sunk, the dust is discharged into the dust water chamber 5 through the bottom orifice plate 54, the diameter of the dust in the purified gas is less than 10 mu m, the dust enters the settling and demisting tower 8 through the spiral rising streamline spiral shell 45 and the outlet diffusion pipe 14, and the dust is discharged into the chimney 7 after further agglomeration, sedimentation and demisting;
step three: when the discharged smoke concentration detector 39 detects that the discharged concentration is more than 10mg/Nm 3 During the process, the controller 52 controls the frequency converter 23 of the surfactant metering pump and the spray water regulating valve 21 through the detected concentration of the discharged dust and the detected flow rate of the flue gas in the first step, so that the total flow rate of the liquid entering the electrostatic generator is 5.2-5.5 m 3 The electrified spray water generates fog drops with the same particle size as the dust through the high-efficiency atomized atomizing nozzle 15 and is used for adsorbing the dust;
fourthly, the grey water at the bottom of the settling demisting tower 8 and the grey water in the grey water chamber 5 are respectively converged into a circulating water pool 26 through a first liquid outlet 49 and a second liquid outlet 50, are separated and precipitated, are pumped out by a circulating water pump 31 and are recycled by the system, and a circulating water density meter 28 detects that the circulating water density is more than 1060kg/m 3 The controller 52 controls the bottom blowdown regulating valve 27 of the circulating water tank 26 to be opened, the liquid level meter 29 detects the liquid level in the circulating water tank 26, when the liquid level drops to be less than 2.8m, the controller 52 controls the water replenishing regulating valve 25 to be opened to start water replenishing, and when the circulating water density meter 28 detects that the circulating water density is less than or equal to 1040kg/m 3 When the controller 52 controls the bottom pollution discharge regulating valve 27 of the circulating water tank 26 to be closed, and when the liquid level meter 29 detects that the liquid level in the circulating water tank 26 rises to 3.2m, the controller 52 controls the water supplementing regulating valve 25 to be closed;
step five: when the controller 52 detects that the second pressure detector 9 at the outlet of the lower demister 13 displays that the pressure is less than 250Pa, the electric valve 53 for the second washing water is opened to enable the lower washing pipeline 44 to wash the lower demister 13; when the controller 52 detects that the pressure displayed by the second pressure detector 9 at the outlet of the lower demister 13 is greater than 350Pa, the electric valve 53 for the second washing water is closed;
step six: when the controller 52 detects that the first pressure detector 12 at the outlet of the upper-layer demister 43 displays pressure less than 100Pa, the electric valve 11 for first washing water is opened to enable the upper-layer washing pipeline 10 to wash the upper-layer demister 43; when the controller 52 detects that the pressure displayed by the first pressure detector 12 at the outlet of the upper demister 43 is greater than 200Pa, the electric valve 11 for the first washing water is closed.
According to the particle size and the charge characteristics of dust, a labyrinth cyclone device is adopted, external foam solution is used for intercepting, adhering, wetting and the like of the dust through a Venturi premixer 4, external surfactant is used for enabling spray water to generate a charge effect through an electrostatic generator 17, and distributed electrostatic adsorption and sedimentation are achieved in the labyrinth cyclone device and a sedimentation demisting tower 8. The spray volume and the spray concentration of the electrified spray water are intelligently adjusted according to the dust emission concentration in the waste gas, the adsorption process is accelerated by means of a gravity field generated by rotational flow, dust particles are promoted to agglomerate, sink and collect, the dust removal effect is realized, the dust is further settled and demisted through the upper part, and the purified gas can reach the ultralow emission standard. Meanwhile, the aim of removing sulfur dioxide can be achieved by adding a desulfurizing agent into the circulating liquid.
The spiral ascending streamline spiral shells 45 are not communicated with each other, and the atomizing nozzles 15 are respectively arranged at the inner upper parts of the spiral ascending streamline spiral shells 45; each spiral ascending streamline spiral shell 45 is only connected in the flowing direction and is independent of each other, the spiral ascending streamline spiral shell 45 is arranged to prolong the smoke stroke, increase the gas-liquid contact time and enhance the dust trapping capacity, in view of the above, the atomizing nozzles 15 are arranged above each rotating channel, the pipeline connected with the atomizing nozzles 15 penetrates through the wall plates of each rotating channel, and the joints are sealed. The dust-containing smoke and the foam solution are fully mixed in the Venturi premixer 4 and then enter the throat 33, the venturi effect is generated, the kinetic energy is improved, the smoke and the foam solution rotate at a high speed and rise, the dust with the diameter of more than 10 mu m is wetted, collided, agglomerated and sunk, the smoke and the foam solution are discharged into the dust chamber 5 through the bottom orifice plate 54, and the diameter of the dust in the purified gas is less than 10 mu m. In order to remove dust below 10 microns, charged fog drops are sprayed on the upper part of the rotary channel, the fog drops are fully contacted with the dust, the fog drops are continuously disturbed and move forwards along with the airflow, and finally discharged into the sedimentation demisting tower 8 through the diffusion pipe 14, and the airflow speed of the high-speed airflow entering a large-volume space is rapidly reduced due to the fact that the sedimentation demisting tower 8 is of a hollow structure, the weight of the fog drops is increased after the fog drops adsorb the dust, the volume of the fog drops is increased, the fog drops gradually sink to the bottom along with the reduction of the airflow speed, and then the fog drops are discharged through a bottom liquid discharge port 49. In short, the atomizing nozzle is in direct contact with the flue gas, so that the sprayed fog drops can be fully mixed with the flue gas, and the phenomena of adsorption, agglomeration, coagulation and the like can occur, thereby playing a role in trapping dust.
The invention adopts grading dust removal, realizes the coagulation, agglomeration and collection of dust by adding specific solution, can realize simultaneous desulfurization and dust removal, has simple structure, convenient operation, small occupied area, less investment and low operation cost, and specifically comprises the following steps: 1. the traditional dust removal facility has larger volume and single function at present, and the invention is arranged by a single tower and processes 20 ten thousand meters 3 The diameter of the tower body of the flue gas per hour is 4.5m, the diameter of the wet-type electric dust removal with the same air quantity needs 6.5m, and other accessory facilities can be flexibly arranged according to local conditions and are not limited by sites; 2. compared with wet electric precipitation, the investment of the invention is saved by 30 percent, and the operation cost is reduced by 20 percent; 3. the invention can automatically control the added solution according to different discharge requirements, has simple operation, does not need to carry out complex adjustment, has good load adaptability, can continuously run, needs to be flushed when the wet-type electric dust collector is powered off, does not work during the power off, and has environmental protection risk when the discharged dust is in an overproof state; 4. the invention is energy-saving and environment-friendly, the waste water can be recycled, the collected wet ash can be sent into a boiler for combustion, and no waste slag is generated; 5. in addition, the invention has the function of desulfurization, realizes desulfurization and dust removal simultaneously and achieves ultralow emission.
The present invention will now be further illustrated with reference to examples in order to explain the present invention in more detail. The specific embodiment is as follows:
example one
A labyrinth cyclone dust collector comprises a mechanical part and a control part, wherein the mechanical part comprises a dust collector, an induced draft fan 1, a surfactant storage tank 24, a circulating water tank 26 and a foam storage tank 34, the dust collector comprises a shell 6, a chimney 7, an upper-layer flushing pipeline 10, an upper-layer demister 43, a lower-layer flushing pipeline 44, a lower-layer demister 13, a settling demisting tower 8, a labyrinth cyclone device and a grey water chamber 5 are sequentially arranged in the shell 6 from top to bottom, the labyrinth cyclone device comprises a throat 33, a spiral ascending streamline spiral shell 45 connected with the throat 33 and an outlet diffusion pipe 14 arranged in the middle of the top of the spiral ascending streamline spiral shell, and the outlet diffusion pipe 14 is arranged in the settling demisting tower 8; the bottom of the spiral rising streamline spiral shell 45 is connected with the grey water chamber 5 through an orifice plate 54; the throat pipe 33 is connected with an outlet of a diffusion section of the Venturi premixer 4, an inlet of the Venturi premixer 4 is connected with a gas pipeline 46 to be dedusted through the induced draft fan 1, and a suction end of the Venturi premixer 4 is connected with the foam storage tank 34 through a first tee joint 47; the inner upper part of the spiral ascending streamline spiral shell 45 is provided with an atomizing nozzle 15, and the atomizing nozzle 15 is connected with a surfactant storage tank 24 through an electrostatic generator 17, a first filter 19 and a second tee joint 48; a first liquid outlet 49 of a cyclone dust removal device is arranged on one side of the bottom of the settling defogging tower 8, a second liquid outlet 50 of the cyclone dust removal device is arranged on one side of the bottom of the ash water chamber 5, the first liquid outlet 49 of the cyclone dust removal device and the second liquid outlet 50 of the cyclone dust removal device are respectively connected with a liquid inlet of the circulating water tank 26 through pipelines, and the liquid outlet at the bottom of the circulating water tank 26 is connected with an aftertreatment system 51 through an adjusting valve 27; a liquid outlet at one side of the circulating water tank 26 is respectively connected with a third end of a second tee joint 48, a third end of a first tee joint 47, the upper-layer flushing pipeline 10 and the lower-layer flushing pipeline 44 through a second filter 30 and a circulating water pump 31; a water replenishing pipeline with a water replenishing regulating valve 25 is arranged on a liquid replenishing port at the top of the circulating water tank 26;
b. the control part comprises a controller 52, signal input ends of the controller 52 are respectively connected with a flue gas flow detection sensor 2, a smoke concentration analyzer 3, a second pressure detector 9, a first pressure detector 12, a circulating water densimeter 28, a liquid level meter 29 and an exhaust smoke concentration detector 39, and signal output ends of the controller 52 are respectively connected with a foam metering pump frequency converter 35, a dilution water regulating valve 37, a surfactant metering pump frequency converter 23, a spray water regulating valve 21, a first washing water electric valve 11, a second washing water electric valve 53, a water supplementing regulating valve 25 and a regulating valve 27. And a boiler flue gas flow detection sensor 2 and a smoke concentration analysis instrument 3 are arranged between the induced draft fan 1 and the inlet of the Venturi premixer 4. A first bottom outlet valve 40, a foam metering pump 36 and a foam electric valve 38 are sequentially arranged between the foam storage tank 34 and the first tee joint 47, and a foam metering pump frequency converter 35 is arranged at the top of the foam metering pump 36. A second bottom outlet valve 41, a surfactant metering pump 22 and a surfactant electric valve 20 are sequentially arranged between the surfactant storage tank 24 and the second tee joint 48, and a surfactant metering pump frequency converter 23 is arranged at the top of the surfactant metering pump 22. A third filter 32 and a spray water regulating valve 21 are sequentially arranged between the circulating water pump 31 and the third end of the second tee joint 48; a dilution water regulating valve 37 is arranged between the circulating water pump 31 and the third end of the first tee joint 47; a first washing water electric valve 11 is arranged between the circulating water pump 31 and the upper washing pipeline 10; a second washing water electric valve 53 is arranged between the circulating water pump 31 and the lower washing pipeline 44. A first discharge valve 16 is arranged between the first liquid discharge port 49 of the flow dust removal device and the liquid inlet of the circulating water tank 26, and a second discharge valve 18 is arranged between the second liquid discharge port 50 of the flow dust removal device and the liquid inlet of the circulating water tank 26. The upper part of the upper layer flushing pipeline 10 is provided with a first pressure detector 12, the upper part of the lower layer flushing pipeline 44 is provided with a second pressure detector 9, and the inner part of the chimney 7 is provided with an exhaust smoke concentration detector 39. The inside level gauge 29 and the circulating water density meter 28 that are equipped with of circulating water pond 26, be equipped with circulating water pond outlet valve 42 between the outlet of circulating water pond 26 and second filter 30. The spiral ascending streamline spiral shells 45 are provided with a plurality of atomizing nozzles 15 respectively inside the spiral ascending streamline spiral shells 45.
A dust removal method of a labyrinth cyclone dust removal device comprises the following steps:
the method comprises the following steps: the dusty flue gas gets into draught fan 1, detects out the flue gas flow through boiler flue gas flow detection sensor 2 on the draught fan 1 export flue, detects the initial concentration of smoke and dust through smoke and dust concentration analysis instrument 3, the controller52, automatically calculating the addition of the foam solution, controlling the frequency converter 35 of the foam metering pump and the adjusting valve 37 of the dilution water to ensure that the total flow of the foam solution entering the Venturi pre-mixer 4 is 10.5-11.5 m 3 /h；
Step two: the dust-containing flue gas and the foam solution are fully mixed in the Venturi premixer 4 and then enter the throat 33, the high-speed rotation and the rising are carried out after the Venturi effect is generated to improve the kinetic energy, the dust with the diameter of more than 10 mu m is wetted, collided, agglomerated and sunk, the dust is discharged into the dust water chamber 5 through the bottom orifice plate 54, the diameter of the dust in the purified gas is less than 10 mu m, the dust enters the settling and demisting tower 8 through the spiral rising streamline spiral shell 45 and the outlet diffusion pipe 14, and the dust is discharged into the chimney 7 after further agglomeration, sedimentation and demisting;
step three: when the discharged smoke concentration detector 39 detects that the discharged concentration is 10mg/Nm 3 When in use, the purified gas is directly discharged through a chimney 7;
fourthly, the grey water at the bottom of the settling demisting tower 8 and the grey water in the grey water chamber 5 are respectively converged into the circulating water pool 26 through a first liquid outlet 49 and a second liquid outlet 50, are extracted by a circulating water pump 31 for recycling of the system after separation and precipitation, and when a circulating water density meter 28 detects that the circulating water density is more than 1060kg/m 3 The controller 52 controls the bottom blowdown regulating valve 27 of the circulating water tank 26 to be opened, the liquid level meter 29 detects the liquid level in the circulating water tank 26, when the liquid level drops to be less than 2.8m, the controller 52 controls the water replenishing regulating valve 25 to be opened to start water replenishing, and when the circulating water density meter 28 detects that the circulating water density is less than or equal to 1040kg/m 3 When the controller 52 controls the bottom pollution discharge regulating valve 27 of the circulating water tank 26 to be closed, and when the liquid level meter 29 detects that the liquid level in the circulating water tank 26 rises to 3.2m, the controller 52 controls the water supplementing regulating valve 25 to be closed;
step five: after the operation is carried out for a period of time, when the controller 52 detects that the pressure displayed by the second pressure detector 9 at the outlet of the lower-layer demister 13 is less than 250Pa, the electric valve 53 of the second washing water is opened to enable the lower-layer washing pipeline 44 to wash the lower-layer demister 13; when the controller 52 detects that the pressure displayed by the second pressure detector 9 at the outlet of the lower demister 13 is greater than 350Pa, the electric valve 53 for the second washing water is closed; the lower layer flushing pipe 44 is flushed;
step six: after the operation is carried out for a period of time, when the controller 52 detects that the pressure at the outlet of the upper-layer demister 43 is less than 100Pa as displayed by the first pressure detector 12, the first washing water electric valve 11 is opened to enable the upper-layer washing pipeline 10 to wash the upper-layer demister 43; when the controller 52 detects that the first pressure detector 12 at the outlet of the upper-layer demister 43 displays pressure greater than 200Pa, the first washing water electric valve 11 is closed; the upper flushing pipe 10 is flushed.
Example two
A labyrinth cyclone dust collector comprises a mechanical part and a control part, wherein the mechanical part comprises a dust collector, an induced draft fan 1, a surfactant storage tank 24, a circulating water tank 26 and a foam storage tank 34, the dust collector comprises a shell 6, a chimney 7, an upper-layer flushing pipeline 10, an upper-layer demister 43, a lower-layer flushing pipeline 44, a lower-layer demister 13, a settling demisting tower 8, a labyrinth cyclone device and a grey water chamber 5 are sequentially arranged in the shell 6 from top to bottom, the labyrinth cyclone device comprises a throat 33, a spiral ascending streamline spiral shell 45 connected with the throat 33 and an outlet diffusion pipe 14 arranged in the middle of the top of the spiral ascending streamline spiral shell, and the outlet diffusion pipe 14 is arranged in the settling demisting tower 8; the bottom of the spiral rising streamline spiral shell 45 is connected with the grey water chamber 5 through an orifice plate 54; the throat pipe 33 is connected with an outlet of a diffusion section of the Venturi premixer 4, an inlet of the Venturi premixer 4 is connected with a gas pipeline 46 to be dedusted through the induced draft fan 1, and a suction end of the Venturi premixer 4 is connected with the foam storage tank 34 through a first tee joint 47; the inner upper part of the spiral ascending streamline spiral shell 45 is provided with an atomizing nozzle 15, and the atomizing nozzle 15 is connected with a surfactant storage tank 24 through an electrostatic generator 17, a first filter 19 and a second tee joint 48; a first liquid outlet 49 of a cyclone dust removal device is arranged on one side of the bottom of the settling defogging tower 8, a second liquid outlet 50 of the cyclone dust removal device is arranged on one side of the bottom of the ash water chamber 5, the first liquid outlet 49 of the cyclone dust removal device and the second liquid outlet 50 of the cyclone dust removal device are respectively connected with a liquid inlet of the circulating water tank 26 through pipelines, and the liquid outlet at the bottom of the circulating water tank 26 is connected with an aftertreatment system 51 through an adjusting valve 27; a liquid outlet at one side of the circulating water tank 26 is respectively connected with a third end of a second tee joint 48, a third end of a first tee joint 47, the upper-layer flushing pipeline 10 and the lower-layer flushing pipeline 44 through a second filter 30 and a circulating water pump 31; a water replenishing pipeline with a water replenishing regulating valve 25 is arranged on a liquid replenishing port at the top of the circulating water tank 26;
b. the control part comprises a controller 52, signal input ends of the controller 52 are respectively connected with a flue gas flow detection sensor 2, a smoke concentration analyzer 3, a second pressure detector 9, a first pressure detector 12, a circulating water densimeter 28, a liquid level meter 29 and an exhaust smoke concentration detector 39, and signal output ends of the controller 52 are respectively connected with a foam metering pump frequency converter 35, a dilution water regulating valve 37, a surfactant metering pump frequency converter 23, a spray water regulating valve 21, a first washing water electric valve 11, a second washing water electric valve 53, a water supplementing regulating valve 25 and a regulating valve 27. And a boiler flue gas flow detection sensor 2 and a smoke concentration analysis instrument 3 are arranged between the induced draft fan 1 and the inlet of the Venturi premixer 4. A first bottom outlet valve 40, a foam metering pump 36 and a foam electric valve 38 are sequentially arranged between the foam storage tank 34 and the first tee joint 47, and a foam metering pump frequency converter 35 is arranged at the top of the foam metering pump 36. A second bottom outlet valve 41, a surfactant metering pump 22 and a surfactant electric valve 20 are sequentially arranged between the surfactant storage tank 24 and the second tee joint 48, and a surfactant metering pump frequency converter 23 is arranged at the top of the surfactant metering pump 22. A third filter 32 and a spray water regulating valve 21 are sequentially arranged between the circulating water pump 31 and the third end of the second tee joint 48; a dilution water regulating valve 37 is arranged between the circulating water pump 31 and the third end of the first tee joint 47; a first washing water electric valve 11 is arranged between the circulating water pump 31 and the upper washing pipeline 10; a second washing water electric valve 53 is arranged between the circulating water pump 31 and the lower washing pipeline 44. A first discharge valve 16 is arranged between the first liquid discharge port 49 of the flow dust removal device and the liquid inlet of the circulating water tank 26, and a second discharge valve 18 is arranged between the second liquid discharge port 50 of the flow dust removal device and the liquid inlet of the circulating water tank 26. The upper part of the upper layer flushing pipeline 10 is provided with a first pressure detector 12, the upper part of the lower layer flushing pipeline 44 is provided with a second pressure detector 9, and the inner part of the chimney 7 is provided with an exhaust smoke concentration detector 39. The inside level gauge 29 and the circulating water density meter 28 of being equipped with of circulating water pond 26, be equipped with circulating water pond outlet valve 42 between the outlet of circulating water pond 26 and second filter 30. The spiral ascending streamline spiral shells 45 are provided with a plurality of atomizing nozzles 15 respectively inside the spiral ascending streamline spiral shells 45.
A dust removal method of a labyrinth cyclone dust removal device comprises the following steps:
the method comprises the following steps: the method comprises the following steps that dusty smoke enters an induced draft fan 1, smoke flow is detected through a boiler smoke flow detection sensor 2 on a smoke outlet flue of the induced draft fan 1, initial smoke concentration is detected through a smoke concentration analyzer 3, the addition of foam solution is automatically calculated by a controller 52, a foam metering pump frequency converter 35 and a dilution water regulating valve 37 are controlled, and the total flow of the foam solution entering a Venturi premixer 4 is 10.5-11.5 m 3 /h；
Step two: the dust-containing flue gas and the foam solution are fully mixed in the Venturi premixer 4 and then enter the throat 33, the high-speed rotation and the rising are carried out after the Venturi effect is generated to improve the kinetic energy, the dust with the diameter of more than 10 mu m is wetted, collided, agglomerated and sunk, the dust is discharged into the dust water chamber 5 through the bottom orifice plate 54, the diameter of the dust in the purified gas is less than 10 mu m, the dust enters the settling and demisting tower 8 through the spiral rising streamline spiral shell 45 and the outlet diffusion pipe 14, and the dust is discharged into the chimney 7 after further agglomeration, sedimentation and demisting;
step three: when the discharged smoke concentration detector 39 detects that the discharged concentration is 20mg/Nm 3 During the process, the controller 52 controls the frequency converter 23 of the surfactant metering pump and the spray water regulating valve 21 through the detected concentration of the discharged dust and the detected flow rate of the flue gas in the first step, so that the total flow rate of the liquid entering the electrostatic generator is 5.2-5.5 m 3 The electrified spray water generates fog drops with the same particle size as the dust through the high-efficiency atomized atomizing nozzle 15 and is used for adsorbing the dust;
fourthly, the grey water at the bottom of the settling demisting tower 8 and the grey water in the grey water chamber 5 are respectively converged into a circulating water pool 26 through a first liquid outlet 49 and a second liquid outlet 50, are separated and precipitated, are pumped out by a circulating water pump 31 for recycling of the system, and are detected by a circulating water densimeter 28The density of the circulating water is measured to be more than 1060kg/m 3 The controller 52 controls the bottom blowdown regulating valve 27 of the circulating water tank 26 to be opened, the liquid level meter 29 detects the liquid level in the circulating water tank 26, when the liquid level drops to be less than 2.8m, the controller 52 controls the water replenishing regulating valve 25 to be opened to start water replenishing, and when the circulating water density meter 28 detects that the circulating water density is less than or equal to 1040kg/m 3 When the controller 52 controls the bottom pollution discharge regulating valve 27 of the circulating water tank 26 to be closed, and when the liquid level meter 29 detects that the liquid level in the circulating water tank 26 rises to 3.2m, the controller 52 controls the water supplementing regulating valve 25 to be closed;
step five: when the controller 52 detects that the second pressure detector 9 at the outlet of the lower demister 13 displays that the pressure is less than 250Pa, the electric valve 53 for the second washing water is opened to enable the lower washing pipeline 44 to wash the lower demister 13; when the controller 52 detects that the pressure displayed by the second pressure detector 9 at the outlet of the lower demister 13 is greater than 350Pa, the electric valve 53 for the second washing water is closed;
step six: when the controller 52 detects that the first pressure detector 12 at the outlet of the upper-layer demister 43 displays pressure less than 100Pa, the electric valve 11 for first washing water is opened to enable the upper-layer washing pipeline 10 to wash the upper-layer demister 43; when the controller 52 detects that the pressure of the first pressure detector 12 at the outlet of the upper demister 43 is greater than 200Pa, the electric valve 11 for the first washing water is closed.
It should be noted that: the electrified spray water generates fog drops with the same particle size as the dust through the high-efficiency atomized atomizer 15 in the third step of the invention, and the fog drops are used for adsorbing the dust; the adsorption efficiency can be effectively improved by electrically spraying the fog drops with the same particle size as the dust, and researches show that the fog drops with the same particle size are easier to combine with the dust and are convenient to capture; if the particle size difference is large, dust is easy to escape, and the dust removal effect is poor. In addition, in the fifth step, a pressure measuring point is arranged at the upper part of the lower-layer demister 13, the pressure is a certain value during normal operation, when the pressure is reduced, the circulation of the lower-layer demister 13 is not smooth, dust is accumulated to cause the reduction of the circulation area, spraying needs to be started at this time, otherwise, the pressure is increased, the circulation of the lower-layer demister 13 is smooth, and the upper-layer demister 43 starts to be blocked.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and the like are to be construed broadly, e.g., as being fixedly connected, integrally connected, or detachably connected; or communication between the interior of the two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations. The above detailed description is only specific to possible embodiments of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments, modifications, and alterations without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (1)
1. A dust removal method of a labyrinth cyclone dust removal device is characterized in that: the dust removal method comprises the following steps:
the method comprises the following steps: the method comprises the steps that dusty smoke enters an induced draft fan (1), smoke flow is detected through a boiler smoke flow detection sensor (2) on an outlet flue of the induced draft fan (1), initial smoke concentration is detected through a smoke concentration analysis instrument (3), the addition of a foam solution is automatically calculated through a controller (52), a foam metering pump frequency converter (35) and a dilution water adjusting valve (37) are controlled, and the total flow of the foam solution entering a Venturi premixer (4) is 10.5-11.5 m 3 /h；
Step two: the method comprises the following steps that dust-containing smoke and foam solution are fully mixed in a Venturi premixer (4) and then enter a throat pipe (33), the smoke and the foam solution rotate at a high speed to rise after generating a Venturi effect to improve kinetic energy, the dust with the diameter of more than 10 mu m is wetted, collided, agglomerated and sunk, the dust is discharged into a dust water chamber (5) through a bottom orifice plate (54), the diameter of the dust in the purified gas is less than 10 mu m, the dust enters a settling defogging tower (8) through a spiral rising streamline spiral shell (45) and an outlet diffusion pipe (14), and the dust is further agglomerated, settled and demisted and then discharged into a chimney (7);
step three: when the discharged smoke concentration detector (39) detects that the discharged concentration is more than 10mg/Nm 3 When the smoke is exhausted, the controller (52) controls the smoke according to the detected concentration of the discharged dust and the smoke flow detected in the step oneA surfactant metering pump frequency converter (23) and a spray water regulating valve (21) to ensure that the total liquid flow entering the electrostatic generator is 5.2-5.5 m 3 The electrified spray water generates fog drops with the same particle size as the dust through the high-efficiency atomized atomizing nozzle (15) and is used for adsorbing the dust;
fourthly, the grey water at the bottom of the settling defogging tower (8) and the grey water in the grey water chamber (5) are respectively converged into a circulating water pool (26) through a first liquid outlet (49) and a second liquid outlet (50), separated and precipitated and then pumped out by a circulating water pump (31) for recycling of the system, and a circulating water density meter (28) detects that the circulating water density is more than 1060kg/m 3 The controller (52) controls the bottom pollution discharge regulating valve (27) of the circulating water tank (26) to be opened, the liquid level meter (29) detects the liquid level in the circulating water tank (26), when the liquid level drops to be less than 2.8m, the controller (52) controls the water replenishing regulating valve (25) to be opened to start water replenishing, and when the circulating water density meter (28) detects that the circulating water density is less than or equal to 1040kg/m 3 When the controller (52) controls the bottom pollution discharge regulating valve (27) of the circulating water tank (26) to be closed, and when the liquid level meter (29) detects that the liquid level in the circulating water tank (26) rises to 3.2m, the controller (52) controls the water supplementing regulating valve (25) to be closed;
step five: when the controller (52) detects that the second pressure detector (9) at the outlet of the lower-layer demister (13) displays that the pressure is less than 250Pa, the second washing water electric valve (53) is opened to enable the lower-layer washing pipeline (44) to wash the lower-layer demister (13); when the controller (52) detects that the pressure displayed by the second pressure detector (9) at the outlet of the lower demister (13) is more than 350Pa, the electric valve (53) of the second washing water is closed;
step six: when the controller (52) detects that the first pressure detector (12) at the outlet of the upper-layer demister (43) displays that the pressure is less than 100Pa, the first washing water electric valve (11) is opened to enable the upper-layer washing pipeline (10) to wash the upper-layer demister (43); when the controller (52) detects that the pressure displayed by the first pressure detector (12) at the outlet of the upper demister (43) is more than 200Pa, the first washing water electric valve (11) is closed.
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| CN110195610B (en) * | 2019-05-09 | 2024-03-08 | 中国矿业大学 | Mining two-stage ultrafiltration critical dry-wet dust collector |
| CN113750734B (en) * | 2020-06-05 | 2023-06-23 | 湖南中冶长天节能环保技术有限公司 | Gas-material separation method and device, transportation system and adsorption analysis system |
| CN115350548A (en) * | 2022-08-25 | 2022-11-18 | 广东兴荣环保科技有限公司 | A device for removing dust and deodorizing dust-containing waste gas and its treatment method |
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| CN102198369A (en) * | 2011-06-01 | 2011-09-28 | 江苏大学 | Swirling inlet type electrostatic spraying wet flue gas desulphurization dedusting apparatus |
| CN102886189A (en) * | 2012-11-09 | 2013-01-23 | 长沙环境保护职业技术学院 | Spiral venturi scrubber and wet-method desulphurization and denitration dust-collecting system |
| CN103446838A (en) * | 2013-09-18 | 2013-12-18 | 王利国 | Wet desulfurization system with electrostatic humidifier |
| CN203886370U (en) * | 2014-03-28 | 2014-10-22 | 大连明强塑料机械有限公司 | Waste gas dust removal and filtration treater |
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| CN104258719A (en) * | 2014-09-04 | 2015-01-07 | 山东清能创新环保科技有限公司 | Desulfuration, denitration and dust removal (PM2.5 removal) three-in-one technical system for boiler exhaust gas by adopting ammonia method |
| CN104874273A (en) * | 2015-05-12 | 2015-09-02 | 安徽金森源环保工程有限公司 | Novel device for deeply removing mist and spray dust of desulfurizing tower |
| CN204973565U (en) * | 2015-09-28 | 2016-01-20 | 龙创信恒（北京）科技有限公司 | Defogging device and flue gas desulphurization device |
| CN205850488U (en) * | 2016-06-14 | 2017-01-04 | 徐满秀 | A kind of efficient wet cyclone dust extractor |
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Address after: 453731 Henan Xinxiang Economic Development Zone (Xiaoji Town) Applicant after: Henan Xinlianxin Chemical Industry Group Co.,Ltd. Address before: 453731 Henan Xinxiang Economic Development Zone Xiaoji Town Henan Xinlianxin Chemical Fertilizer Co., Ltd. Applicant before: HENAN XINLIANXIN FERTILIZER Co.,Ltd. |
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