CN114522933B - Dust removal system, dust removal method and application thereof - Google Patents

Dust removal system, dust removal method and application thereof Download PDF

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Publication number
CN114522933B
CN114522933B CN202210038756.XA CN202210038756A CN114522933B CN 114522933 B CN114522933 B CN 114522933B CN 202210038756 A CN202210038756 A CN 202210038756A CN 114522933 B CN114522933 B CN 114522933B
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dust
dredging pipe
ash
dust removal
pipe
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CN114522933A (en
Inventor
查安鸿
胡俊平
潘新辉
车彦婷
黄文正
何青华
丁安琪
经勇明
陈生利
陈科
莫泽军
李玉革
宁建刚
江志华
肖方锦
李伟韶
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SGIS Songshan Co Ltd
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SGIS Songshan Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06—Spray cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/04—Cleaning by suction, with or without auxiliary action
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cleaning In General (AREA)

Abstract

The invention relates to the technical field of dust removal, in particular to a dust removal system, a dust removal method and application thereof, comprising a blowing mechanism, an ash extraction mechanism, a dredging pipe and a dust suppression part arranged on the dredging pipe, wherein the blowing mechanism and the ash extraction mechanism are respectively arranged on two opposite sides of ash covering equipment; and the dust suppressing portion includes: the circular ring piece is sleeved on the circumferential direction of the dredging pipe; and a plurality of nozzles are arranged at intervals in the direction of the inner circumference of the circular ring piece, the water spraying direction of the nozzles is arranged towards the direction of the exhaust port of the dredging pipe part where the dust suppression part is positioned, and the included angle between the water spraying direction and the wall of the dredging pipe close to the downstream is smaller than 45 degrees. The dust removing system has a simple structure, particularly, air pressure difference is formed in the dredging pipe, a certain suction power is provided, and the flow direction of dust can be controlled very well, so that the dust can be controlled effectively, the suction power of the dust suction mechanism can be reduced, and the energy consumption is saved.

Description

Dust removal system, dust removal method and application thereof
Technical Field
The invention relates to the technical field of dust removal, in particular to a dust removal system, a dust removal method and application thereof.
Background
In the metallurgical industry, many devices are provided with filter screens, because dust and particulate matters inevitably exist in the production process or the atmosphere, particularly in heavy metal manufacturing industries such as steel production workshops, the filter screens of direct current motors are more prominent, ash removal is required to be carried out on the filter screens every 2-4 weeks, and the purpose of the filter screens is to ensure the air permeability of the filter screens and recover the technical purpose of the filter screens.
In a method in the prior art, when an operator cleans the detached ash covering equipment one by blowing the ash covering equipment through a compressed air pipe, the dust contains a large amount of ferric oxide components, and the dust flies all over the sky in the blowing process, so that the surrounding production environment is seriously influenced, and meanwhile, the physical and psychological health of the operator is greatly influenced, and when the detached ash covering equipment is blown one by one, the operation efficiency is extremely low. Moreover, when cleaning dust on lighter weight equipment such as a direct current motor filter screen, compressed air can blow the equipment, and an operator still has to grasp the equipment through limbs or fix the filter screen by other objects, and when the equipment is purged each time, the operation content makes the operator very headache and aversion, and simultaneously the operation mode can not be more effective for cleaning dust in the equipment.
In the prior art, the following technical disadvantages also exist:
and (3) a step of: the existing dust removing equipment has complex structure and high equipment requirement, and dust cannot be effectively controlled in the cleaning process;
and II: iron oxide in the dust can not be recovered and falls to the ground freely or is discharged as household garbage;
thirdly,: dust in the ash covering equipment cannot be effectively cleaned;
fourth, the method comprises the following steps: the cleaning difficulty of lighter ash-covering equipment is high;
fifth step: the operation efficiency is low, and even if an operator brings a protective mask, the operator can be injured.
Disclosure of Invention
The invention aims to overcome the defects that the dust removing equipment in the prior art is complex in structure, high in equipment requirement, incapable of effectively controlling dust and not environment-friendly, and provides a dust removing system, a dust removing method and application thereof.
In order to achieve the above object, in a first aspect, the present invention provides a dust removal system, including a blowing mechanism, an ash extraction mechanism, and an ash evacuation pipe, which are sequentially disposed, and a dust suppression portion disposed on the ash evacuation pipe, where the blowing mechanism and the ash extraction mechanism are disposed on opposite sides of an ash covering device, respectively; and the dust suppressing portion includes:
the circular ring piece is sleeved on the circumferential direction of the dredging pipe;
and a plurality of nozzles are arranged at intervals in the direction of the inner circumference of the circular ring piece, the water spraying direction of the nozzles is arranged towards the direction of the exhaust port of the dredging pipe part where the dust suppression part is positioned, and the included angle between the water spraying direction and the wall of the dredging pipe close to the downstream is smaller than 45 degrees.
Preferably, the angle between the water spraying direction and the pipe wall of the dredging pipe close to the downstream is 10-35 degrees.
Preferably, the ratio of the spacing between two adjacent nozzles to the total length of the inner circumference along the inner circumference of the annular ring is 1-4:100, preferably 1.2-3.5:100.
Preferably, the water spray pressure of the nozzle is 0.2-0.7MPa, more preferably 0.2-0.5MPa, relative to the dredging pipe having an inner diameter of 40-50 cm.
Preferably, the water spray pressure of the nozzle increases by 0.01-0.02MPa every 1cm of the inner diameter of the dredging pipe.
Preferably, the suction air quantity in the ash suction mechanism is 2000-8000m relative to the dredging pipe with the inner diameter of 40-50cm 3 /h, more preferably 2000-6000m 3 /h。
More preferably, during the peak period of electricity consumption, the suction air quantity in the ash suction mechanism is 2000-3000m 3 And/h, the water spray pressure of the nozzle is 0.4-0.5MPa; in the low-peak period of electricity consumption, the suction air quantity in the ash suction mechanism is 5000-6000m 3 And/h, the water spray pressure of the nozzle is 0.2-0.3MPa.
Preferably, the tail end of the dredging pipe is lower than the ash extraction mechanism, no more than 6 elbows are arranged on the dredging pipe, and the dust suppression part is arranged upstream of a first elbow close to the ash extraction mechanism.
Preferably, 1 elbow is arranged on the dredging pipe.
Preferably, the portion of the dredging pipe located before the first elbow is obliquely arranged.
Preferably, for the portion of the dredging pipe located before the first bend,
when the portion is horizontally disposed, it satisfies: aspect ratio is 15-20:1, preferably 17-18:1, a step of; and the ratio of the space between the dust suppression part and the first elbow to the inner diameter of the dredging pipe is 1-10:1, and more preferably 3-10:1, more preferably 5-6:1, a step of;
when the part is arranged vertically, the following conditions are satisfied: aspect ratio is 3-20:1, preferably 5-6:1, a step of; and the ratio of the space between the dust suppression part and the first elbow to the inner diameter of the dredging pipe is 2-10:1, preferably 3-4:1.
preferably, the purging mechanism comprises a frame and a rotatable purging pipe arranged on the frame, wherein one side of the purging pipe, which is close to the ash extraction mechanism, is provided with a plurality of purging ports for purging ash covering equipment at multiple angles.
Preferably, the dust removal system further comprises:
the support net is arranged on one side of the ash extraction mechanism, close to the blowing mechanism, and is used for supporting ash covering equipment;
the air deflector is arranged on one side, close to the blowing mechanism, of the ash extraction mechanism, and the opening of the air deflector is gradually reduced along the direction, close to the ash extraction mechanism.
Preferably, the dust removal system further comprises: and the recovery part is positioned at the outlet of the dredging pipe and is used for recovering the airflow and/or dust coming out of the dredging pipe.
Preferably, the recovery part is a slag flushing ditch or a sedimentation tank.
In a second aspect, the present invention provides a dust removing method of the dust removing system according to the first aspect, including:
placing the ash covering equipment between the blowing mechanism and the ash extracting mechanism and closing the ash extracting mechanism; then, the blowing mechanism, the ash extraction mechanism and the dust suppression part are started, and after the dust on the ash covering equipment is blown up by the blowing mechanism, the dust is sucked into the dredging pipe by the ash extraction mechanism, atomized by water spraying of the dust suppression part and then flows to the downstream of the dredging pipe.
Preferably, the dust removing method further comprises: according to the storage conditions of actual electric energy and water energy, the suction air quantity of the ash suction mechanism and the water spray pressure of the dust suppression part are adjusted.
Preferably, the dust removing method further comprises: and introducing turbid water and air flow formed after spraying water and atomizing into the slag flushing ditch so as to replace air in the slag flushing ditch and/or recover ferric oxide in dust.
In a third aspect, the invention provides an application of the dust removal system in dust removal of dust covering equipment of a steel rolling workshop.
According to the technical scheme, the dust suppression part with a specific structure is matched with the position setting of the blowing mechanism and the ash extraction mechanism, so that the dust which is blown by rapid and comprehensive suction can be atomized into liquid, the adverse effect on the environment or operators is avoided, and the environmental protection performance is remarkably improved; the dust suppression part with the specific structure can realize uniform and rapid dust atomization, so that an air pressure difference is formed between the dust suction mechanism positioned at the head of the dredging pipe and the dust suppression part on the dredging pipe, a certain suction power is provided, the dust flow direction can be controlled very well, the dust can be controlled effectively, the suction power of the dust suction mechanism can be reduced, and the energy consumption is saved.
In addition, the invention combines wind energy (or electric energy) and water energy to form complementation, can adaptively adjust the dosage of wind energy and water energy according to the social and environmental protection requirements under any condition, ensures that the cleaning work of the ash covering equipment is completed, and reduces the energy consumption at the same time so as to realize low carbon and environmental protection.
The invention also has at least the following advantages:
the method comprises the following steps: the dust-collecting device has the advantages that the structure is simple, the requirements on equipment are low, dust on dust-collecting equipment is effectively controlled in the cleaning process, the condition that the dust flies all the day is avoided, and physical and mental health of operators and on-site operators is facilitated;
and two,: the dust is atomized into liquid, so that the recovery of ferric oxide in the dust is facilitated, the energy is saved, the environment is protected, and the environment-friendly project can be completed without a great amount of investment;
and thirdly,: the position of the blowing mechanism and the position of the ash extraction mechanism are matched, so that the ash extraction mechanism can be used for extracting ash from one surface of the ash covering device, the blowing mechanism can be used for blowing ash from the other surface, the efficiency is greatly improved, the operation personnel are saved from blowing the ash covering device by using handheld equipment, the operation can be finished by only placing the ash covering device on one side of the ash extraction mechanism and rotating the blowing mechanism and starting the ash extraction mechanism;
fourth, it is: the device is particularly suitable for lighter ash-covering equipment, and has higher cleaning cleanliness;
fifth, it is: the operation efficiency is greatly improved, and the health can be ensured by the operators with the common protective mask.
Furthermore, under the scheme of adopting the preferable structure of the invention, the adopted wind energy and water energy are further reduced while the dust removal effect is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an embodiment of the dust removal system of the present invention.
Fig. 2 is a side view of the dust suppression section of fig. 1.
FIG. 3 is a schematic structural view of one embodiment of a purge mechanism.
FIG. 4 is a schematic diagram of an embodiment of an ash extraction mechanism.
Description of the reference numerals
1-sweeping mechanism 2-ash extraction mechanism 3-dredging pipe
4-dust suppression part 5-recovery part 6-supporting net
7-air deflector
11-purge pipe 12-purge port 13-handle
31-elbow
41-circular ring member 42-nozzle 43-water inlet
Detailed Description
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
In the present invention, "upstream" and "downstream" refer to upstream and downstream of the dust flow direction. The terms "vertical," "horizontal," and the like, refer generally to the orientation shown in the drawings and in the practice, and "inner and outer" refer to the inner and outer sides of the outline of the component.
As described above, in a first aspect, the present invention provides a dust removal system, as shown in fig. 1, including a blowing mechanism 1, an ash extraction mechanism 2, and a dredging pipe 3 sequentially disposed, and a dust suppression portion 4 disposed on the dredging pipe 3, where the blowing mechanism 1 and the ash extraction mechanism 2 are disposed on opposite sides of an ash covering device, respectively; and the dust suppressing portion 4 includes:
a ring member 41 fitted around the circumferential direction of the evacuation pipe 3;
and a plurality of nozzles 42 arranged at intervals in the direction of the inner circumference of the circular ring member 41, wherein the water spraying direction of the nozzles 42 is arranged towards the exhaust port direction of the part of the dredging pipe 3 where the dust suppression part 4 is positioned, and the included angle between the water spraying direction and the pipe wall of the dredging pipe 3 close to the downstream is smaller than 45 degrees.
In the invention, particularly, through the matched arrangement of the structures, the dust in the suction airflow can be sprayed and atomized rapidly and uniformly in a short time, on one hand, the dust on the other end of the dredging pipe 3 can be prevented from flying by the dust spraying cover, on the other hand, a certain air pressure difference can be formed in the dust suction mechanism 2, and a certain suction power can be formed by the air pressure difference, so that a strong suction force can be applied to the dust by using a small suction power, the dust flow direction can be controlled well, and the energy consumption can be obviously saved; and the structure is simple, and the requirement on the matched equipment is not high because the strong suction power is not needed. The invention can clean 50-100 kg of dust per minute under the condition that the dust does not overflow when entering the suction mechanism 2.
Preferably, the angle between the water spray direction and the pipe wall of the dredging pipe 3 immediately downstream is 10 ° to 35 °, further preferably 10 ° to 30 °. The preferred scheme is more beneficial to quickly and uniformly atomizing dust in the suction airflow, and more promotes the guiding and speed of the air quantity in the suction mechanism 2. It will be appreciated that the water spray direction is set towards the exhaust port at the other end of the evacuation pipe 3.
In the present invention, it is understood that the dredging pipe 3 is connected with the ash extraction mechanism 2 in a sealing manner, for example, can be connected in a detachable manner without gaps. The person skilled in the art can arrange the other end of the dredging pipe 3 to any collection or recovery point according to the actual requirements.
The invention has no limitation on the installation mode of the dredging pipe 3 and the dust suppression part 4, and only can realize sealing connection; for example, the dredging pipe 3 may comprise a first dredging pipe and a second dredging pipe, between which the dust suppressing part 4 is connected without gaps. It will be appreciated that the dust suppressing portion 4 may have the same or different, preferably the same, inner diameter as the inner diameter of the dredging pipe 3.
Preferably, a plurality of nozzles 42 are provided at uniform intervals in the direction of the inner circumference of the ring member 41.
It will be appreciated that, as shown in fig. 2, the ring member 41 includes an outer ring line and an inner ring line that surround to form a water flow channel, the inner circumference of the ring member refers to the inner ring line, and a water outlet (not shown) is provided on the inner ring line, the water outlet is correspondingly connected to the nozzle 42, or the water outlet and the nozzle 42 are integrally configured to spray water, and a water inlet 43 is provided on the outer ring line of the ring member 41, and the water inlet 43 is communicated with a water source. From the cost aspect, the water source is preferably turbid circulating water, and can also be clean circulating water.
According to the present invention, it is preferable that the ratio of the interval between adjacent two nozzles 42 to the total length of the inner circumference is 1 to 4:100, more preferably 1.2 to 3.5:100, along the inner circumferential direction of the annular member 41. According to the preferable scheme, the atomization uniformity and timeliness are promoted, the rapid formation of the air pressure difference is facilitated, and the air pressure difference is increased.
In a more preferred embodiment, the spacing between adjacent two nozzles 42 is 2-5cm relative to a 50cm inner diameter annular member 41.
It is understood that the interval between the adjacent two nozzles 42 refers to the rectangular length between the adjacent two nozzles 42 in the inner circumferential direction of the annular ring 41.
In the invention, the size of the blowing mechanism 1 and the size of the ash extracting mechanism 2 can be selected by a person skilled in the art according to the size of the ash covering equipment so as to realize efficient dust removal with matching performance.
The water pressure of the water spray from the nozzle 42 can be chosen by the person skilled in the art according to the dimensions of the evacuation tube 3, in order to facilitate atomization. Preferably, the water spray pressure of the nozzle 42 is 0.2 to 0.7MPa, more preferably 0.2 to 0.5MPa, with respect to the dredging pipe 3 having an inner diameter of 40 to 50 cm.
More preferably, the water spray pressure of the nozzle 42 increases by 0.01 to 0.02MPa per 1cm increase in the inner diameter of the dredging pipe 3. According to the preferred scheme, the atomization effect can be kept good along with the change of the inner diameter of the dredging pipe 3.
The person skilled in the art can choose the suction air volume in the evacuation duct 3 on the basis of considerations of the steady flow of air and the suction of dust. Preferably, the suction air quantity in the ash suction mechanism 2 is 2000-8000m relative to the dredging pipe 3 with the inner diameter of 40-50cm 3 /h, more preferably 2000-6000m 3 And/h. This preferred scheme is more favorable to promoting the steady circulation of convulsions air current, promotes the dust to suck fast simultaneously.
Furthermore, the suitability of the air quantity and the water pressure can be adjusted by a person skilled in the art according to the actual conditions of electric energy or wind energy and a water source, so that dust removal can be realized under the conditions of energy conservation and water conservation. For example, the air extraction quantity is reduced in the electricity consumption peak period, and the water pressure of water spraying is increased; in the low peak period of electricity consumption, the air pumping quantity is increased, and the water pressure of water spraying is reduced.
More preferably, the suction air volume in the ash suction mechanism 2 is 2000-3000m in the electricity consumption peak period relative to the dredging pipe 3 with the inner diameter of 40-50cm 3 And/h, the water pressure of the water sprayed from the nozzle 42 is 0.4-0.65MPa, more preferably 0.4-0.5MPa; because the water pressure equipment is always in a production state and is irrelevant to the electricity consumption in a production workshop, the electricity consumption can be reduced in the electricity consumption peak period, and the water pressure is increased to drive the air flow in the dredging pipe 3 and increase the water mist, so that the ash covering equipment is cleaned; in the low-peak period of electricity consumption, the suction air quantity in the ash suction mechanism 2 is 5000-8000m 3 Preferably 5000-6000m 3 And/h, the water pressure of water sprayed by the nozzle 42 is 0.2-0.3MPa. The preferable scheme can realize energy conservation, environmental protection, wind energy (or electric energy) andthe water energy is mutually combined to form complementation, so that the cleaning work of the ash covering equipment is finished according to the social and environmental protection requirements under any condition, the energy consumption is reduced, and the low-carbon environment protection of enterprises is realized.
In the invention, a person skilled in the art can determine whether to use electricity in a peak period or a low peak period according to the actual electricity use condition and the actual time difference; for example, the peak electricity consumption period is 8.00 a.m. to 22.00 a.m. and the rest is the low peak electricity consumption period.
In the present invention, the shape of the dredging pipe 3 can be selected by those skilled in the art according to the suction and the airflow circulation conditions thereof, and for example, the dredging pipe can be linear or multi-line type (such as multi-bending structure). It will be appreciated that whatever the shape of the evacuation tube 3, it is necessary to ensure that the atomized liquid is directed out, on the basis of which the person skilled in the art can optimise the shape of the evacuation tube 3.
Preferably, the height of the tail end of the dredging pipe 3 is lower than the height of the ash extraction mechanism 2, and no more than 6 elbows 31 are arranged on the dredging pipe 3.
It should be understood that when the dredging pipe 3 has a plurality of bends 31, the whole of the dredging pipe 3 should run downwards to smoothly lead out the atomized liquid.
In the invention, the relative positions of the dust suppression part 4 and the plurality of elbows 31 can be selected by a person skilled in the art according to the air flow condition and the dust suppression effect; for example, the dust suppression portion 4 may be located upstream or downstream of any elbow 31.
In a particularly preferred embodiment, the dust suppression portion 4 is arranged upstream of the first bend 31 close to the ash extraction mechanism 2. According to the preferred scheme, smooth circulation of air flow and atomized liquid is realized through the self weight of the air draft, dust and water, and meanwhile, the large loss of the suction air quantity of the ash suction mechanism 2 is effectively prevented.
In another embodiment, the dust suppression portion 4 is arranged downstream of the first bend 31. This preferred embodiment has a dust suppression effect that is more than 30% less attenuated than the one provided upstream of the first bend 31.
More preferably, 1 elbow 31 is provided on the dredging pipe 3.
Preferably, the part of the dredging pipe 3 positioned in front of the first elbow 31 is obliquely arranged, which is more beneficial to fully exerting the driving function of gravity on the atomized liquid, and simultaneously reducing the suction air quantity loss to the greatest extent. It will be appreciated that the portion of the dredging pipe 3 located before the first bend 31 is referred to as the portion of the dredging pipe 3 located near the ash extraction mechanism 2, i.e. the portion of the dredging pipe 3 near the head, before the first bend 31.
In the present invention, it is preferable that, for the portion of the dredging pipe 3 located before the first bend 31,
when the section is horizontally disposed (as shown in fig. 1), it satisfies: aspect ratio is 15-20:1, preferably 17-18:1, a step of; and the ratio of the space between the dust suppressing part 4 and the first elbow 31 to the inner diameter of the dredging pipe 3 is 1-10:1, and more preferably 3-10:1, more preferably 5-6:1, a step of;
when the part is arranged vertically, the following conditions are satisfied: aspect ratio is 3-20:1, preferably 5-6:1, a step of; and the ratio of the space between the dust suppressing part 4 and the first elbow 31 to the inner diameter of the dredging pipe 3 is 2-10:1, preferably 3-4:1.
under the above-mentioned preferred scheme, can further improve the flow direction control to the dust, drive the air fast flow through the wind energy in elbow 31 department, blow the dust of atomizing to elbow 31 back more smoothly, prevent that wind energy from flowing unsmooth in elbow 31 department and leading to the energy loss, with the dust that sweeps more, high-efficient, quick, stable suction to dredge in the pipe 3, and further make the dust in the suction air current more quick, more even atomizing, more do benefit to and promote the atmospheric pressure difference, and then promote the atomized liquid to circulate downwards through first elbow 31 smoothly, prevent the granule deposit in the atomized liquid in the position before first elbow 31.
In the present invention, the "aspect ratio" refers to the ratio of the length of the portion of the dredging pipe 3 located before the first elbow 31 to the inner diameter, wherein the length refers to the distance between the head edge of the dredging pipe 3 and the center point of the first elbow 31 along the axial direction of the portion of the dredging pipe 3.
The "distance between the dust suppressing portion 4 and the first bend 31" means the distance between the annular center point of the dust suppressing portion 4 and the center point of the first bend 31 in the axial direction of the portion of the dredging pipe 3.
The specific structure of the purging mechanism 1 of the invention enables purging to be carried out on the ash covering equipment so as to raise dust. For example, it may be an automatically controlled or manually operated blowpipe.
In a specific preferred embodiment, as shown in fig. 3, the purging mechanism 1 includes a frame (not shown in the drawing) and a rotatable purging pipe 11 mounted on the frame, and a plurality of purging ports 12 are formed on a side of the purging pipe 11, which is close to the ash extraction mechanism 2, for purging the ash covering equipment at multiple angles. Under the preferred scheme, the mechanism can fix the blowing pipe 11, and the blowing pipe with the blowing gas pressure can not bring extra workload to operators, so that the mode that the original operators need to hold the compressed air blowing pipe to blow the ash covering equipment is changed; and the purge pipe 11 is rotatable, can sweep in multiple angles, and a plurality of purge ports 12 sweep more thoroughly, high-efficiently.
It should be understood that the purge tube 11 may be connected to the frame horizontally as shown in fig. 3 or vertically.
It will be appreciated that the purge tube 11 is provided with an inlet port (not shown) which communicates with the purge port 12 to provide purge gas (preferably compressed air). The number and arrangement spacing of the purge ports 12 can be selected by one skilled in the art according to the size of the ash handling equipment; for example, may be arranged in a single row along the axial direction of the purge tube 11.
The rotatable purge pipe 11 controls a purge angle by rotation to achieve full purge. The invention has no limitation on the specific connection mode of the purging pipe 11 which is rotatable, so long as the purging pipe 11 can rotate, for example, the purging pipe can be manually controlled, for example, a handle 13 can be specifically arranged on one side of the purging pipe 11, and the purging pipe 11 is arranged on the frame in a rolling way through a bearing; the automatic control may be also realized, for example, by connecting a motor to the end of the purge tube 11, and by controlling the forward rotation and reverse rotation of the motor.
In the present invention, the number of the purge pipes 11 may be one or a plurality (for example, a plurality of the purge pipes may be arranged in parallel). In view of energy consumption, one purge pipe 11 may be used to save energy for purging energy. In view of the operation efficiency, a plurality of purge pipes 11 may be used, and the operation time is short.
The invention has no limitation on the concrete structure of the ash extraction mechanism 2, and can realize ash extraction; for example, as shown in fig. 4, the ash extraction mechanism 2 may include an ash extraction pipe (not shown in the drawing) and an axial flow fan (not shown in the drawing) with an impeller disposed in the ash extraction pipe, where the main advantage of the design is that the market purchase is convenient, or the self-manufacturing is convenient, the installation direction of the axial flow fan is toward the purge mechanism 1, and the wind direction is set by the purge mechanism 1 toward the ash extraction mechanism 2, that is, one side of the ash extraction pipe toward the purge mechanism 1 is an air inlet, and the other side is an air outlet.
In the invention, the ash extraction mechanism 2 can be vertically arranged, and all devices behind the dredging pipe 3 are vertically arranged at the moment, and the height is preferably between 0.6 and 1.6 meters, so that the operation is convenient, and an operator can work after standing; the device can be arranged in the horizontal direction, as shown in fig. 1, is suitable for installation in various environments, has low requirement on installation space, and has certain operation difficulty when relatively heavy equipment is cleaned.
According to the present invention, preferably, as shown in fig. 4, the dust removing system further includes: and a support net 6, which is arranged on one side of the ash extraction mechanism 2 close to the blowing mechanism 1, and is used for supporting ash covering equipment. The person skilled in the art can select the mesh number of the support net 6 according to the actual requirement, preferably the mesh number is based on that the fingers of the operator cannot be plugged into the holes, so that the safety can be ensured, and meanwhile, the ash covering equipment to be purged can be placed on the support net 6.
According to the present invention, preferably, as shown in fig. 1, the dust removing system further includes: and the air deflector 7 is arranged on one side of the ash extraction mechanism 2 close to the blowing mechanism 1. More preferably, the opening of the air deflector 7 is gradually reduced in a direction approaching the ash extraction mechanism 2, i.e., in a horn shape. By adopting the preferable scheme of the invention, the wind direction of the dust and the dust suction mechanism 2 can be better controlled, and as much dust as possible is sucked into the dust suction mechanism 2.
According to the present invention, preferably, as shown in fig. 1, the dust removing system further includes: and a recovery part 5, which is positioned at the outlet of the dredging pipe 3 and is used for recovering the airflow and/or dust coming out of the dredging pipe 3. For recovery of the gas stream, the person skilled in the art can use existing recovery structures; for dust recovery, one skilled in the art can choose the recovery equipment based on the recovery or disposal of a component.
More preferably, the recovery unit 5 is a slag runner or a sedimentation tank. It is understood that the slag runner or settling pond is typically located at a level below ground level, including but not limited to a slag runner of a rolling mill. The preferable scheme is more beneficial to recycling iron elements in dust and is convenient for centralized treatment.
In the invention, if the actual application scene has no geographic position similar to a slag flushing ditch (namely a position lower than the ground), a sedimentation tank can be manufactured, iron in dust and water of the dust suppression part 4 flow into the sedimentation tank through the dredging pipe 3, the dust is settled at the bottom of the sedimentation tank, after a certain amount of dust is collected, recoverable elements such as iron element in the dust are removed or extracted for reuse, water is discharged to a wastewater collection tank through a high-level water outlet above the sedimentation tank, and the wastewater can be reused in the dust suppression part 4 after the sedimentation in the collection tank.
The dust removing system of the invention can be used for any dust-covering equipment needing dust removal in any field, and is especially suitable for lighter dust-covering equipment, such as a filter screen.
In a second aspect, the present invention provides a dust removing method of the dust removing system described in the first aspect, including:
placing the ash covering equipment between the blowing mechanism 1 and the ash extracting mechanism 2 and closing the ash extracting mechanism 2; then, the blowing mechanism 1, the ash extraction mechanism 2 and the dust suppression part 4 are started, and after the dust on the ash covering equipment is blown up by the blowing mechanism 1, the dust is sucked into the dredging pipe 3 by the ash extraction mechanism 2, atomized by water spraying of the dust suppression part 4 and then flows to the downstream of the dredging pipe 3.
It should be appreciated that the water spray, after atomization, flows downstream with the air flow.
Preferably, the dust removing method further comprises: according to the storage conditions of actual electric energy and water energy, the suction air quantity of the ash suction mechanism 2 and the water spray pressure of the dust suppression part 4 are regulated.
In the above-mentioned preferred scheme, can be according to actual conditions, suitability adjustment wind energy and hydroenergy can satisfy actual demand, can guarantee dust removal effect again, and energy-concerving and environment-protective. For example, in the electricity consumption peak period (8.00 in the morning to 22.00 in the evening and the rest is the low peak period), the air quantity can be properly regulated down, and the water pressure can be adaptively regulated so as to maximally save electric energy or wind energy; in the low peak period of electricity consumption, the water pressure is reduced, the air quantity is adjusted in an adaptive manner, and water energy is saved to the greatest extent.
In the dust removing method of the invention, the person skilled in the art can also perform proper communication or centralized collocation treatment according to specific dust conditions (such as metal elements contained in a steel rolling workshop) and other existing treatment units (such as slag flushing ditches).
According to the present invention, preferably, the dust removing method further includes: and introducing turbid water and air flow formed after spraying water and atomizing into the slag flushing ditch so as to replace air in the slag flushing ditch and/or recover ferric oxide in dust. Under the preferred scheme, the atomized liquid of the iron in the dust and the water of the dust suppression part 4 can flow into the slag flushing ditch through the dredging pipe 3, and can be discharged into the cyclone well together with the ferric oxide flowing to the slag flushing ditch in the workshop production process for centralized collection treatment; and the air flow in the dredging pipe 3 can replace the harmful gas in the slag flushing ditch, thereby achieving the purposes of recovery and high-efficiency utilization.
In a third aspect, the invention provides an application of the dust removal system in dust removal of dust covering equipment of a steel rolling workshop.
The dust removal system is used for dust removal of dust covering equipment of a steel rolling workshop, and can be used for intensively recovering iron elements in dust into a slag flushing ditch for centralized treatment; while the suction gas flow can be used to displace harmful gases in the slag runner.
The following describes the technical solution in the embodiment of the present invention in detail with reference to the drawings in the embodiment of the present invention.
Example 1
The dust removing system of this embodiment, as shown in fig. 1-4, includes a purge mechanism 1, an ash extraction mechanism 2, a dredging pipe 3 provided with an elbow 31, a recovery portion 5 (slag runner), and a dust suppressing portion 4 provided on the dredging pipe 3, wherein the head portion of the dredging pipe 3 is inclined and the end height is lower than the height of the ash extraction mechanism 2, the dust suppressing portion 4 is structured as shown in fig. 2, and includes a ring member 41 and nozzles 42 provided at intervals along the inner circumferential direction thereof, the water spraying direction of the nozzles 42 is set toward the exhaust port direction of the dredging pipe 3, and the included angle between the water spraying direction and the pipe wall of the dredging pipe 3 adjacent to the downstream is 25 °, the distance between two adjacent nozzles 42 is 4cm, the inner diameter of the dredging pipe 3 is 50cm, and the inner diameter of the dust suppressing portion 4 is identical to the inner diameter of the dredging pipe 3. For the portion of the hydrophobic conduit 3 located before the elbow 31 (i.e. the head portion), the aspect ratio is 18:1, a step of; and the ratio of the space between the dust suppressing part 4 and the elbow 31 to the inner diameter of the dredging pipe 3 is 5:1.
and the ash extraction mechanism 2 is provided with a support net 6 and an air deflector 7 at one side close to the blowing mechanism 1. The purging mechanism 1 is shown in fig. 3, and comprises a frame, a rotatable purging pipe 11 and a handle 13 for controlling rotation, wherein a row of purging ports 12 are arranged on the purging pipe 11 along the horizontal direction; the ash extraction mechanism 2 comprises an ash extraction pipe and an axial flow fan with an impeller, which is arranged in the ash extraction pipe, as shown in fig. 4. The axial fan is equipped with a 3KW centrifugal fan which can generate 6000m 3 Air quantity per hour.
The dust removal process is as follows: after wearing the mask, an operator holds ash covering equipment (a supporting net for covering ash in a steel rolling workshop) on an air deflector 7 on an ash extraction mechanism 2, and starts a blowing mechanism 1, the ash extraction mechanism 2 and a dust suppression part 4, dust on the ash covering equipment is blown up by the blowing mechanism 1, is quickly sucked into a dredging pipe 3 by the ash extraction mechanism 2, is atomized by spraying water through the dust suppression part 4, and flows to a downstream slag flushing ditch of the dredging pipe 3.
Wherein, in the electricity consumption peak period, the air extraction quantity is reduced and is 2500m 3 And/h, specifically adopting a centrifugal fan of 3KW, using variable frequency control, and outputting half the frequency25 Hz, compared with the maximum air quantity, the power consumption can be reduced by half, and meanwhile, the dust suction and atomization effects are ensured; the hydraulic pressure of the dredging pipe 3 is increased, the hydraulic pressure is set to be 0.50MPa, the pressure is controlled by a water pump or a valve, if the valve is controlled, the valve is fully opened, and if the water pump is controlled, the flow of the water pump is fully opened; in the production workshop, the hydraulic equipment is always in a production state, is irrelevant to electricity consumption, and does not have electricity consumption.
In the low peak period of electricity consumption, the air extraction quantity is increased to 6000m 3 And/h, the hydraulic pressure of the dredging pipe 3 is reduced, the hydraulic pressure is set to be 0.20MPa, and water saving can be realized.
In the dust removal process of the embodiment, no dust leaks into the environment (namely no overflow) through observation; meanwhile, energy conservation and environmental protection are realized, wind energy and water energy are combined with each other to form complementation, equipment cleaning work of ash covering is completed according to social and environmental protection requirements under any condition, and energy consumption is reduced, so that low carbon and environmental protection of enterprises are realized.
Example 2
The procedure is as in example 1, except that the angle between the direction of the water jet from the nozzle 42 and the wall of the dredging pipe 3 immediately downstream is 40 °.
Under the scheme, in the electricity consumption peak period, the air extraction quantity is required to be increased to 7000m 3 And/h, the energy consumption can be saved relative to the maximum air quantity, and the water pressure needs to be increased to 0.6MPa in the electricity consumption low-peak period. The dust removal effect of suction and atomization was the same as in example 1.
Example 3
The procedure is as in example 1, except that, for the portion of the hydrophobic tube 3 located before the elbow 31, the aspect ratio is 1:20.
under the scheme, in the electricity consumption peak period, the air extraction quantity is required to be improved to 8000m 3 And/h, the energy consumption can be saved relative to the maximum air quantity, and the water pressure needs to be increased to 0.65MPa in the electricity consumption low-peak period. The dust removal effect of suction and atomization was the same as in example 1.
Example 4
The procedure is as in example 1, except that the ratio of the spacing between the dust suppressing portion 4 and the elbow 31 to the inner diameter of the dredging pipe 3 is 1:1.
under the scheme, in the electricity consumption peak period, the air extraction quantity is required to be improved to 8000m 3 And/h, the energy consumption can be saved relative to the maximum air quantity, and the water pressure needs to be increased to 0.6MPa in the electricity consumption low-peak period. The dust removal effect of suction and atomization was the same as in example 1.
According to the embodiment, by adopting the scheme of the invention, dust can be rapidly sucked for rapid atomization, and the dust is prevented from leaking into the environment; meanwhile, energy conservation and environmental protection are realized, complementation can be formed by combining wind energy and water energy, equipment cleaning work of ash covering is completed according to social and environmental protection requirements under any conditions, energy consumption is reduced, and low carbon and environmental protection of enterprises are realized.
Further, as can be seen from a comparison of the embodiment 1 and the embodiments 2 to 4, by optimizing the structure of the dredging pipe and the dust suppressing portion 4 and the parameter setting thereof, energy saving and environment protection optimization, such as selective water saving or electricity saving according to the electricity consumption and water source conditions, can be realized.
The above is only a specific embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (13)

1. The dust removing system for the ash covering equipment of the steel rolling workshop comprises a blowing mechanism (1), an ash extracting mechanism (2) and a dredging pipe (3) which are sequentially arranged, and a dust suppressing part (4) arranged on the dredging pipe (3), and is characterized in that the blowing mechanism (1) and the ash extracting mechanism (2) are respectively arranged on two opposite sides of the ash covering equipment, and gaps among the blowing mechanism (1), the ash extracting mechanism (2) and the ash covering equipment are in an open non-closed state; and the dust suppression portion (4) includes:
the circular ring piece (41) is sleeved on the sparse pipe (3) in the circumferential direction;
and a plurality of nozzles (42) which are arranged at intervals in the direction of the inner circumference of the circular ring member (41), wherein the water spraying direction of the nozzles (42) is arranged towards the direction of the exhaust port of the part of the dredging pipe (3) where the dust suppression part (4) is positioned, and the included angle between the water spraying direction and the pipe wall of the dredging pipe (3) close to the downstream is 10 degrees to 35 degrees; the ratio of the space between two adjacent nozzles (42) to the total length of the inner circumference is 1-4:100 along the direction of the inner circumference of the annular ring (41); the water spray pressure of the nozzle (42) is 0.2-0.7MPa relative to the dredging pipe (3) with the inner diameter of 40-50 cm;
wherein the tail end of the dredging pipe (3) is lower than the ash extraction mechanism (2), no more than 6 elbows (31) are arranged on the dredging pipe (3), and the dust suppression part (4) is arranged at the upstream of a first elbow (31) close to the ash extraction mechanism (2);
for the part of the dredging pipe (3) located before the first elbow (31), when this part is arranged horizontally, the following is true: aspect ratio is 15-20:1, a step of; the ratio of the space between the dust suppression part (4) and the first elbow (31) to the inner diameter of the dredging pipe (3) is 1-10:1; when the part is arranged vertically, the following conditions are satisfied: aspect ratio is 3-20:1, a step of; and the ratio of the space between the dust suppression part (4) and the first elbow (31) to the inner diameter of the dredging pipe (3) is 2-10:1.
2. a dust removal system according to claim 1, characterized in that the ratio of the distance between adjacent two nozzles (42) to the total length of the inner circumference in the direction of the inner circumference of the ring element (41) is 1.2-3.5:100.
3. The dust removal system according to claim 2, characterized in that the water spray pressure of the nozzle (42) is 0.2-0.5MPa with respect to the dredging pipe (3) with an inner diameter of 40-50 cm;
every 1cm of the inner diameter of the dredging pipe (3) is increased, the water spraying pressure of the nozzle (42) is increased by 0.01-0.02MPa;
the suction air quantity in the ash suction mechanism (2) is 2000-8000m relative to the dredging pipe (3) with the inner diameter of 40-50cm 3 /h。
4. A dust removal system according to claim 3, characterized in thatCharacterized in that the suction air quantity in the ash suction mechanism (2) is 2000-6000m relative to the dredging pipe (3) with the inner diameter of 40-50cm 3 /h。
5. A dust removal system according to claim 3, characterized in that the suction air volume in the dust extraction mechanism (2) is 2000-3000m during peak electricity consumption periods 3 And/h, the water pressure of the water sprayed by the nozzle (42) is 0.4-0.5MPa; in the low-peak period of electricity consumption, the suction air quantity in the ash suction mechanism (2) is 5000-6000m 3 And/h, the water pressure of water sprayed by the nozzle (42) is 0.2-0.3MPa.
6. The dust removal system according to claim 1, characterized in that 1 of the elbows (31) is arranged on the dredging pipe (3); the part of the dredging pipe (3) positioned in front of the first elbow (31) is obliquely arranged.
7. The dust removal system according to claim 1, characterized in that for the part of the dredging pipe (3) located before the first bend (31),
when the portion is horizontally disposed, it satisfies: aspect ratio of 17-18:1, a step of; and the ratio of the space between the dust suppression part (4) and the first elbow (31) to the inner diameter of the dredging pipe (3) is 3-10:1, a step of;
when the part is arranged vertically, the following conditions are satisfied: aspect ratio is 5-6:1, a step of; and the ratio of the space between the dust suppression part (4) and the first elbow (31) to the inner diameter of the dredging pipe (3) is 3-4:1.
8. the dust removal system of claim 1, wherein,
the purging mechanism (1) comprises a frame and a rotatable purging pipe (11) arranged on the frame, wherein one side of the purging pipe (11) close to the ash extraction mechanism (2) is provided with a plurality of purging ports (12) for purging ash covering equipment at multiple angles;
and/or, the dust removal system further comprises:
the support net (6) is arranged on one side of the ash extraction mechanism (2) close to the blowing mechanism (1) and is used for supporting ash covering equipment;
the air deflector (7) is arranged on one side, close to the blowing mechanism (1), of the ash extraction mechanism (2), and the opening of the air deflector (7) is gradually reduced along the direction, close to the ash extraction mechanism (2).
9. The dust removal system of claim 1, further comprising: and the recovery part (5) is positioned at the outlet of the dredging pipe (3) and is used for recovering the airflow and/or dust coming out of the dredging pipe (3).
10. The dust removal system according to claim 9, characterized in that the recovery section (5) is a slag runner or a sedimentation tank.
11. A dust removal method of a dust removal system for a dust removal device for a steel rolling mill shop, as claimed in any one of claims 1 to 10, comprising:
placing the ash covering equipment between the blowing mechanism (1) and the ash extracting mechanism (2) and closing the ash extracting mechanism (2); then, the blowing mechanism (1), the dust suction mechanism (2) and the dust suppression part (4) are started, dust on the dust covering equipment is blown up by the blowing mechanism (1), is sucked into the dredging pipe (3) by the dust suction mechanism (2), is atomized by spraying water through the dust suppression part (4), and then flows to the downstream of the dredging pipe (3).
12. The dust removal method according to claim 11, characterized in that the dust removal method further comprises: according to the storage conditions of actual electric energy and water energy, the suction air quantity of the ash suction mechanism (2) and the water spray pressure of the dust suppression part (4) are regulated.
13. The dust removal method according to claim 11 or 12, characterized in that the dust removal method further comprises: and introducing turbid water and air flow formed after spraying water and atomizing into the slag flushing ditch so as to recycle ferric oxide in dust and/or replace air in the slag flushing ditch.
CN202210038756.XA 2022-01-13 2022-01-13 Dust removal system, dust removal method and application thereof Active CN114522933B (en)

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