CN109758841B - System and method for treating waste gas containing sticky dust - Google Patents
System and method for treating waste gas containing sticky dust Download PDFInfo
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- CN109758841B CN109758841B CN201910099362.3A CN201910099362A CN109758841B CN 109758841 B CN109758841 B CN 109758841B CN 201910099362 A CN201910099362 A CN 201910099362A CN 109758841 B CN109758841 B CN 109758841B
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- 239000000428 dust Substances 0.000 title claims abstract description 225
- 239000002912 waste gas Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 124
- 239000004744 fabric Substances 0.000 claims abstract description 106
- 239000007789 gas Substances 0.000 claims abstract description 48
- 238000005507 spraying Methods 0.000 claims abstract description 36
- 238000004140 cleaning Methods 0.000 claims abstract description 25
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 238000010926 purge Methods 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 12
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- -1 greasy dirt Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 150000003384 small molecules Chemical class 0.000 description 1
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Classifications
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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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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to an exhaust gas treatment system containing sticky dust and a treatment method thereof, wherein the exhaust gas treatment system comprises a pre-powder spraying device, cloth bag dust removing equipment and intelligent control equipment, a discharge hole of the pre-powder spraying device and an inlet of the cloth bag dust removing equipment are sequentially arranged on an exhaust gas pipeline along the air flow direction of exhaust gas, the cloth bag dust removing equipment is provided with a plurality of dust removing unit boxes which independently work, each dust removing unit box is provided with three working modes of dust adding on the outer surface of a dust removing cloth bag, filtering and removing the dust of the dust removing cloth bag and cleaning the surface of the dust removing cloth bag, and the intelligent control equipment is used for controlling the plurality of dust removing unit boxes to work sequentially, circularly switching the dust removing unit boxes to work in the three working modes, and starting the pre-powder spraying device when at least one dust removing unit box is in the dust removing cloth bag filtering and dust removing working mode. The invention solves the technical problems that the sticky dust of the waste gas adheres to the surface of the filter material, blocks the filter material and cannot be cleaned in the prior art by combining the pre-spraying powder and the cloth bag powder coating, and simultaneously ensures that the removal rate of the sticky dust in the waste gas is more than or equal to 90 percent, the technology is intensive and the operation cost is low.
Description
Technical Field
The invention relates to the technical field of environmental protection engineering, in particular to an exhaust gas treatment system containing sticky dust and a treatment method.
Background
With the development of economy, industrial production is greatly increased, and a large amount of industrial waste gas is discharged, so that the quality of the atmospheric environment is reduced. In recent years, haze weather frequently occurs, so that serious harm is brought to human health, and huge loss is caused to national economy. Dust pollution occupies a large proportion in atmospheric pollution, and although large pollution emission sources are effectively controlled, such as industries of thermal power plants, cement building materials and the like, ultra-low emission requirements are met in the year, pollution emission of a large number of small and medium-sized enterprises still needs to be improved. In areas with developed hardware manufacturing industry, procedures such as smelting, casting, spraying and the like are required in the production process, and a large amount of industrial dust is discharged. Because the dust and waste gas contains adhesive substances such as greasy dirt, paint mist and the like, certain technical difficulties exist in the treatment process. The technology for treating the waste gas mainly comprises the following steps: water spraying, metal film filtering, cloth bag dust removing and the like.
The water spraying method is to make the waste gas enter a water spraying tower through a collecting pipeline, so that water is fully contacted with the waste gas, and the waste gas is separated from the waste gas by utilizing the contact of the water with particles. The method can bring about secondary pollution of wastewater. Metal membrane filtration is a form of filtration designed for the adhesion characteristics exhibited by sticky and corrosive dust, particularly when the dust contains greater oiliness. The method needs to be stopped for cleaning, takes out the filter material, uses alkaline water for cleaning, is troublesome to operate and use, and can bring about secondary pollution of wastewater. The cloth bag dust removing method is a dry dust removing device which is suitable for capturing fine and dry non-fibrous dust. When the dust-containing gas enters the bag-type dust collector, dust with large particles and high specific gravity is precipitated under the action of gravity and falls into the ash bucket, and the gas containing finer dust is blocked when passing through the filter material, so that the gas is purified. The deposited dust on the filter bag is removed by adopting a method of blowing pulse air flow, thereby achieving the aim of removing dust, and the removed dust is discharged by a dust discharging device. When the waste gas contains oil mist besides dust, the oil mist can be adhered to the surface of the filter material, and the pulse back blowing can not realize ash removal, so that filter materials are blocked, the equipment can not be used, the filter materials are replaced frequently, and the operation cost is high.
Disclosure of Invention
The invention aims to solve the problems, and provides an exhaust gas treatment system and an exhaust gas treatment method containing sticky dust.
According to one aspect of the invention, an exhaust gas treatment system containing viscous dust is provided, which comprises a pre-powder spraying device, a cloth bag dust removing device and an intelligent control device, wherein a discharge hole of the pre-powder spraying device and an exhaust gas inlet of the cloth bag dust removing device are sequentially arranged on an exhaust gas pipeline along the flow direction of exhaust gas.
The cloth bag dust collecting equipment is provided with a plurality of dust collecting unit boxes which independently work, each dust collecting unit box is provided with three working modes of dust collecting cloth bag outer surface powder adding, dust collecting cloth bag filtering dust collecting and dust collecting cloth bag surface cleaning, and the intelligent control equipment is used for controlling the plurality of dust collecting unit boxes to work sequentially, circularly switching each dust collecting unit box to work in the three working modes and starting the pre-powder spraying device when at least one dust collecting unit box is in the dust collecting cloth bag filtering dust collecting working mode.
The cloth bag dust removing device further comprises an exhaust gas inlet channel and a gas exhaust channel, one end of the exhaust gas inlet channel is communicated with the air inlet of each dust removing unit box, the other end of the exhaust gas inlet channel is communicated with the exhaust gas inlet, one end of the gas exhaust channel is communicated with the air outlet of each dust removing unit box, the other end of the gas exhaust channel is provided with a drainage fan, and the air inlet and the air outlet are both provided with electromagnetic valves.
The inside of the dust removal unit box is provided with a dust removal cloth bag, a dust removal cloth bag cleaning system and a dust removal cloth bag powder adding system, and the intelligent control equipment controls the drainage fan, the electromagnetic valve, the dust removal cloth bag cleaning system and the dust removal cloth bag powder adding system.
The dust removing cloth bag powder adding system comprises a powder feeder for feeding dry powder into a dust removing unit box and a stirrer for stirring the fed dry powder, and the intelligent control equipment is connected with the powder feeder and the stirrer.
The cloth bag cleaning system comprises a wind pressure sensor and a purging device, wherein the wind pressure sensor is used for monitoring the powder attaching amount of the dust removing cloth bag, and the intelligent control device is connected with the wind pressure sensor and the purging device.
The dust removing unit box is further provided with an ash bucket and a guide plate, the ash bucket is communicated with the powder feeder, the stirrer is positioned in the ash bucket, the guide plate is used for settling large particles in waste gas entering the dust removing unit box to the ash bucket, and the waste gas containing residual small particles is discharged after being filtered by the dust removing cloth bag.
The pre-powder spraying device comprises a dry powder bin, a powder conveying pipeline, a powder conveying system and a fan, wherein two ends of the powder conveying pipeline are respectively communicated with the exhaust pipeline and the fan, and the powder conveying system and the fan are controlled by intelligent control equipment.
The powder feeding system comprises a weighing sensor, a servo motor and a conveying rod, wherein the servo motor is used for controlling the conveying speed of the conveying rod, the weighing sensor is used for weighing the powder output of the dry powder bin, and the servo motor and the weighing sensor are connected with the intelligent control equipment.
The dust hopper is positioned below the dust collection cloth bag, the guide plate and the air inlets are positioned between the dust hopper and the dust collection cloth bag, the guide plate is opposite to the air inlets and perpendicular to the air flow direction of the air inlets, and the air outlets are positioned above the air inlets.
The bag-type dust removing equipment further comprises a sensor positioned at the bottom of the ash bucket, and the sensor is used for recording the weight of dust in the ash bucket under three working modes.
According to another aspect of the present invention, there is provided an exhaust gas treatment method of the exhaust gas treatment system, comprising the steps of:
a. and determining the optimal powder spraying amount of the pre-powder spraying device and the optimal unit powder attaching amount of the dust removing cloth bag, which are suitable for the waste gas to be treated, and inputting the optimal unit powder attaching amount into intelligent control equipment.
b. The drainage fan is opened through intelligent control equipment, the electromagnetic valve of each air outlet and the powder adding system of each dust removing cloth bag are opened one by one, the electromagnetic valve of each air inlet is closed, and a plurality of dust removing unit boxes sequentially enter a powder adding working mode on the outer surface of the dust removing cloth bag until the optimal powder adding amount per unit area is reached.
c. The dust removal cloth bag powder adding system is sequentially closed through the intelligent control equipment, the pre-powder spraying device is started, the electromagnetic valve of each air inlet is opened one by one, a plurality of dust removal unit boxes sequentially enter a dust removal cloth bag filtering dust removal working mode until a wind pressure sensor of the corresponding dust removal cloth bag cleaning system sends an opening signal to the intelligent control equipment.
d. The purging device of the dust collection cloth bag cleaning system is sequentially started through the intelligent control device, so that a plurality of dust collection unit boxes sequentially enter a dust collection cloth bag surface cleaning working mode until corresponding wind pressure sensors sequentially send stop signals to the intelligent control device.
e. And c, sequentially repeating the steps b-d by a plurality of dust removing unit boxes until the waste gas to be treated is treated cleanly and discharged.
According to the system and the method for treating the waste gas containing the sticky dust, the technical problems that the sticky dust of the waste gas is adhered to the surface of a filter material, a filter material is blocked and cannot be cleaned in the prior art are solved by combining the pre-spraying powder and the bag-type powder coating, and the removal rate of the sticky dust in the waste gas is ensured to be more than or equal to 90%. In addition, through processing apparatus continuously add powder, dust removal sack filtration dust removal and dust removal sack surface cleaning three working modes down cyclic switching operation until the waste gas that removes, increased the intensification of removing useless technique, avoid frequently changing the consumptive material, reduce operation cost.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a front view of an exhaust treatment system containing sticky dust in accordance with an embodiment of the present invention;
fig. 2 is a side view of an exhaust treatment system containing sticky dust in accordance with an embodiment of the invention.
Fig. 3 is a flow chart of a method of treating an exhaust gas containing sticky dust according to an embodiment of the invention.
Detailed Description
Exemplary implementations of the present disclosure will be described in more detail below according to examples. While exemplary embodiments of the present disclosure are shown in the specification, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1-2, an exhaust gas treatment system containing viscous dust includes a pre-powder-spraying device 1, a bag-type dust removing device 2 and an intelligent control device (not shown), wherein a discharge port of the pre-powder-spraying device 1 and an inlet of the bag-type dust removing device 2 are sequentially arranged on an exhaust gas pipeline 100 along the flow direction of exhaust gas, and an arrow in the figure indicates the flow direction. The intelligent control equipment controls the powder spraying amount of the powder spraying device 1. The dust-spraying premixing zone is arranged in the exhaust gas channel arranged at the front end of the dust-removing equipment, and auxiliary treatment dust (talcum powder) is quantitatively sprayed in the dust-spraying premixing zone, so that the dust is adhered to the outer surface of the viscous dust, and the viscous dust with viscosity is converted into general dry dust.
The cloth bag dust collecting device 2 is provided with a plurality of dust collecting unit boxes 210, an exhaust gas inlet duct 230 and a gas exhaust duct 240 which work independently, the dust collecting unit boxes 210 are also provided with dust collecting cloth bags 2110, dust collecting cloth bag cleaning systems and dust collecting cloth bag dust adding systems, one end of the exhaust gas inlet duct 230 is fixed at an inlet of the cloth bag dust collecting device 2, the other end of the exhaust gas inlet duct is communicated with an air inlet of each dust collecting unit box 210, mixed dust is shunted to each dust collecting unit box 210, one end of the gas exhaust duct 220 is communicated with an air outlet of each dust collecting unit box 210 and is used for collecting and discharging clean gas, the other end of the gas exhaust duct 220 is provided with a drainage fan (not shown), and an air inlet and an air outlet of each dust collecting unit box 210 are all provided with electromagnetic valves 2120.
The intelligent control device controls the opening and closing of a drainage fan (not shown), an electromagnetic valve 2120, a dust removing cloth bag cleaning system and a dust removing cloth bag powder adding system, so that the plurality of dust removing unit boxes 210 are sequentially switched over in three working modes of powder adding on the outer surface of the dust removing cloth bag, dust removing cloth bag filtering and removing and dust removing cloth bag surface cleaning. Before the waste gas enters the dust removing equipment, a layer of powder cake is attached to the outer portion of the cloth bag through the powder spraying equipment in advance, so that the sticky dust is not directly contacted with the cloth bag, the irreversible blocking influence of the sticky dust on the filtering cloth bag is prevented, and the load of the cloth bag dust removing equipment is reduced.
The bag-type dust collector is divided into a plurality of dust collection unit boxes 210 connected in parallel, and each unit box is provided with an inlet and outlet shutoff valve, so that the off-line dust collection and powder attachment of the separation chamber can be realized while the continuous operation of the treatment process is ensured. Each dust removing unit box 210 is circularly switched in three working modes in sequence through the intelligent control equipment, so that at least one dust removing unit box 210 can be ensured to be in dust removing work in each time period during the waste gas dust removing period, and the continuous operation of the whole cloth bag dust removing equipment 2 can be maintained.
The dust removing cloth bag powder adding system comprises a powder feeder for feeding dry powder into the dust removing unit box 210 and a stirrer for stirring the fed dry powder, and the intelligent control equipment is electrically connected with the powder feeder and the stirrer. The bottom of the dust removing cloth bag is provided with an ash bucket which is communicated with the powder feeder, and the stirrer is positioned in the ash bucket. The intelligent control equipment is used for opening the air outlets of the induced draft fan and the dust removing unit box 210, closing the air inlets, forming negative pressure in the dust removing unit box 210, conveying dry powder into the ash hopper through the powder conveying machine, forming vortex in the ash hopper by using the stirrer, forming negative pressure vortex by combining the vortex with the negative pressure environment, conveying the dry powder in the ash hopper out, and enabling the dry powder to be adsorbed on the surface of the dust removing cloth bag. The weighing sensor arranged at the bottom of the ash bucket is used for sensing the powder loss quantity of the ash bucket during each adsorption, namely the powder attachment quantity of the dust removing cloth bag. The pre-operation of the multiple filtering dust removal working mode is carried out, and the weight of the initial state, the running process and the ash removal is monitored through the bearing sensor, so that the powder attaching condition of each dust removal cloth bag is judged, the powder attaching quantity of the cloth bag with unit area is set, and the completeness of powder attaching can be ensured. And when the powder attaching quantity reaches the preset value, transmitting a signal to intelligent control equipment, stopping the powder feeder and the stirrer, and stopping adding powder.
The dust removing unit box 210 is also provided with a guide plate, both the guide plate and the air inlet are positioned between the ash bucket and the dust removing cloth bag, and the guide plate is opposite to the air inlet. After powder adding is stopped, a valve of an air inlet is opened, mixed dust air flow formed by mixing the waste gas pipelines is led into the dust removing unit box 210 along the horizontal direction, the guide plates are arranged along the vertical direction, after the mixed dust air flow meets the guide plates, macromolecule waste gas particles in the air flow directly settle into the ash bucket through impacting the guide plates, and small molecule waste gas particles in the air flow ascend along the vertical direction along with the air flow after impacting the guide plates, flow through the outer surface of the dust removing cloth bag and are adhered and removed. The rest clean air enters the inside of the dust removing cloth bag and is discharged through an exhaust pipeline communicated with the inside of the dust removing cloth bag. The air outlet of the dust removing unit box 210 is arranged above the air inlet, so that the adhesion dust and the dry powder can be further mixed, and the effect is improved.
The cloth bag purging system comprises a wind pressure sensor for monitoring the powder attaching quantity of the dust removing cloth bag and purging equipment, and the intelligent control equipment controls the purging equipment to clean the outer surface of the dust removing cloth bag through a feedback signal of the wind pressure sensor. In the dust removal and filtration working mode, when the wind pressure sensor detects that the pressure difference between the inside and the outside of the unit box 210 approaches zero, a signal is fed back to the intelligent control equipment, and the purging equipment is started to purge the outer surface of the dust removal cloth bag. Because the viscous molecules in the waste gas are wrapped by the dry powder, and the surface of the cloth bag is provided with the dry powder layer, the purging is easy. And stopping purging when the pressure difference between the inside and the outside of the box is recovered, and closing a valve of the air inlet to continuously add powder on the surface of the dust removing cloth bag. In a specific embodiment, the purging device is a compressed air bag with a pulse valve, and can perform pulse blowing ash removal on the surface of the dust collection cloth bag.
The pre-powder spraying device 1 comprises a dry powder bin 110, a powder conveying pipeline, a powder conveying system and a fan 120, wherein two ends of the powder conveying pipeline are respectively communicated with an exhaust pipeline and the fan 120, the powder conveying system is used for conveying dry powder in the middle of the powder conveying pipeline, and the powder conveying system and the fan 120 are electrically connected with intelligent control equipment. The fan 120 is a high-pressure cyclone fan, so that dry powder can be accelerated to be blown into a conveying pipeline containing adhesive dust waste gas, and the effect of uniform mixing is achieved.
The powder feeding system comprises a weighing sensor 140, a servo motor 150 and a conveying rod 160, wherein the servo motor 150 is used for controlling the conveying speed of the conveying rod 160, the weighing sensor 140 is used for weighing the powder discharge amount of the dry powder storage bin 110, and the servo motor 150 and the weighing sensor 140 are connected with intelligent control equipment. The double screws are adopted to convey powder, so that the uniformity of feeding is ensured, and meanwhile, the servo motor is arranged, so that the powder feeding amount can be adjusted according to the concentration of adhesive dust in waste gas. The weighing sensor and the servo motor are electrically connected with the intelligent control equipment, so that the high material level and the low material level of the pre-powder spraying equipment can be detected, and meanwhile, the weight change in the whole feeding process is detected; the rotating speed of the servo motor can be controlled, so that the uniformity of the whole feeding process is achieved, and abnormal conditions are alarmed.
As shown in fig. 3, the exhaust gas treatment method of the exhaust gas treatment system mainly includes the following steps: determining the optimal powder spraying amount of a pre-powder spraying device suitable for waste gas to be treated and the optimal powder attaching amount of a dust removing cloth bag in unit area, and inputting the optimal powder spraying amount and the optimal powder attaching amount into intelligent control equipment; opening a drainage fan through intelligent control equipment, opening the electromagnetic valve of each air outlet one by one, and closing the electromagnetic valve of each air inlet and each dust removing cloth bag powder adding system, so that a plurality of dust removing unit boxes sequentially enter a dust removing cloth bag outer surface powder adding working mode to achieve the optimal powder adding amount per unit area; opening the electromagnetic valve and the pre-powder spraying device of each air inlet one by one, and closing the dust collecting cloth bag powder adding system in sequence, so that a plurality of dust collecting unit boxes enter a dust collecting cloth bag filtering dust collecting working mode in sequence until a wind pressure sensor of a corresponding dust collecting cloth bag cleaning system sends an opening signal to intelligent control equipment; the purging device of the dust-collecting cloth bag cleaning system is sequentially started through the intelligent control device, so that a plurality of dust-collecting unit boxes sequentially enter a dust-collecting cloth bag surface cleaning working mode until the wind pressure sensor of the corresponding dust-collecting cloth bag cleaning system sequentially sends a stop signal to the intelligent control device; and c, controlling a plurality of dust removing unit boxes to sequentially repeat the steps b-d through the intelligent control equipment until the waste gas to be treated is treated cleanly and discharged.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. The waste gas treatment system containing the sticky dust is characterized by comprising a pre-powder spraying device (1), cloth bag dust removing equipment (2) and intelligent control equipment, wherein a discharge hole of the pre-powder spraying device (1) and a waste gas inlet of the cloth bag dust removing equipment (2) are sequentially arranged on a waste gas pipeline (100) along the gas flow direction of waste gas;
the cloth bag dust removing equipment (2) is provided with a plurality of dust removing unit boxes (210) which independently work, each dust removing unit box (210) is provided with three working modes of dust adding on the outer surface of a dust removing cloth bag, filtering and dust removing of the dust removing cloth bag and cleaning of the surface of the dust removing cloth bag, and the intelligent control equipment is used for controlling the plurality of dust removing unit boxes (210) to work sequentially, each dust removing unit box (210) to work in a circulating switching mode under the three working modes, and when at least one dust removing unit box (210) is in the dust removing cloth bag filtering and dust removing working mode, the pre-spraying device (1) is started;
the cloth bag dust removing device (2) further comprises an exhaust gas inlet channel (230) and a gas exhaust channel (240), one end of the exhaust gas inlet channel (230) is communicated with the air inlet of each dust removing unit box (210), the other end of the exhaust gas inlet channel is communicated with the exhaust gas inlet, one end of the gas exhaust channel (240) is communicated with the air outlet of each dust removing unit box (210), the other end of the gas exhaust channel is provided with a drainage fan, and the air inlet and the air outlet are both provided with electromagnetic valves;
a dust removing cloth bag, a dust removing cloth bag cleaning system and a dust removing cloth bag powder adding system are arranged in the dust removing unit box (210), and the intelligent control equipment controls the drainage fan, the electromagnetic valve, the dust removing cloth bag cleaning system and the dust removing cloth bag powder adding system;
the dust removing cloth bag powder adding system comprises a powder feeder for feeding dry powder into the dust removing unit box and a stirrer for stirring the fed dry powder, and the intelligent control equipment is connected with the powder feeder and the stirrer;
the dust removing unit box (210) is also provided with an ash bucket and a guide plate, the ash bucket is communicated with the powder feeder, the stirrer is positioned in the ash bucket, and the guide plate is used for settling large particles in the waste gas entering the dust removing unit box (210) to the ash bucket and filtering the waste gas containing the residual small particles through the dust removing cloth bag and then discharging the waste gas;
the cloth bag dust removing device (2) further comprises a sensor positioned at the bottom of the ash bucket, wherein the sensor is used for recording the weight of dust in the ash bucket in the three working modes;
the cloth bag cleaning system comprises a wind pressure sensor and a purging device, wherein the wind pressure sensor is used for monitoring the powder attaching amount of the dust removing cloth bag, and the intelligent control device is connected with the wind pressure sensor and the purging device.
2. The exhaust treatment system of claim 1, wherein,
the pre-powder spraying device (1) comprises a dry powder bin (110), a powder conveying pipeline, a powder conveying system and a fan (120), wherein two ends of the powder conveying pipeline are respectively communicated with the waste gas pipeline and the fan (120), and the powder conveying system and the fan (120) are controlled by intelligent control equipment.
3. The exhaust treatment system of claim 2, wherein,
the powder conveying system comprises a weighing sensor (140), a servo motor (150) and a conveying rod (160), wherein the servo motor (150) is used for controlling the conveying speed of the conveying rod (160), the weighing sensor (140) is used for weighing the powder outlet amount of the dry powder storage bin (110), and the servo motor (150) and the weighing sensor (140) are connected with the intelligent control equipment.
4. The exhaust treatment system of claim 1, wherein,
the dust hopper is located below the dust collection cloth bag, the guide plate and the air inlet are both located between the dust hopper and the dust collection cloth bag, the guide plate is opposite to the air inlet in position and perpendicular to the air flow direction of the air inlet, and the air outlet is located above the air inlet.
5. An exhaust gas treatment method using the exhaust gas treatment system according to any one of claims 1 to 4, comprising the steps of:
a. determining the optimal powder spraying amount of a pre-powder spraying device suitable for waste gas to be treated and the optimal unit powder attaching amount of a dust removing cloth bag, and inputting the optimal unit powder attaching amount into the intelligent control equipment;
b. opening a drainage fan through intelligent control equipment, opening an electromagnetic valve of each air outlet and a powder adding system of each dust removing cloth bag one by one, and closing the electromagnetic valve of each air inlet, so that the dust removing unit boxes sequentially enter a powder adding working mode on the outer surface of the dust removing cloth bag until the optimal powder adding amount per unit area is reached;
c. sequentially closing a dust removing cloth bag dust adding system through intelligent control equipment, starting a pre-powder spraying device, and opening electromagnetic valves of each air inlet one by one, so that the dust removing unit boxes sequentially enter a dust removing cloth bag filtering dust removing working mode until a wind pressure sensor of a corresponding dust removing cloth bag cleaning system sends an opening signal to the intelligent control equipment;
d. sequentially starting a purging device of the dust collection cloth bag cleaning system through the intelligent control device, so that the dust collection unit boxes sequentially enter a dust collection cloth bag surface cleaning working mode until the corresponding wind pressure sensors sequentially send a stop signal to the intelligent control device;
e. and d, sequentially repeating the steps b-d by the plurality of dust removing unit boxes until the waste gas to be treated is treated cleanly and discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910099362.3A CN109758841B (en) | 2019-01-31 | 2019-01-31 | System and method for treating waste gas containing sticky dust |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910099362.3A CN109758841B (en) | 2019-01-31 | 2019-01-31 | System and method for treating waste gas containing sticky dust |
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| CN109758841A CN109758841A (en) | 2019-05-17 |
| CN109758841B true CN109758841B (en) | 2024-04-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110439867B (en) * | 2019-07-26 | 2020-09-15 | 平邑北新建材有限公司 | Cloth bag dust collection fan and starting method thereof |
| CN112138475B (en) * | 2020-09-30 | 2024-01-30 | 中冶焦耐(大连)工程技术有限公司 | Coke oven dissipation smoke dust distributed dust removal system and working method thereof |
| CN112892100A (en) * | 2021-03-11 | 2021-06-04 | 机械工业第九设计研究院有限公司 | Novel paint mist capturing unit assembly structure |
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