CN211989132U - Scrap steel crushing and dust collecting system - Google Patents
Scrap steel crushing and dust collecting system Download PDFInfo
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- CN211989132U CN211989132U CN201922265317.9U CN201922265317U CN211989132U CN 211989132 U CN211989132 U CN 211989132U CN 201922265317 U CN201922265317 U CN 201922265317U CN 211989132 U CN211989132 U CN 211989132U
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Abstract
The utility model discloses a scrap steel crushing and dust collecting system, which comprises a floccule separation chamber, a cyclone dust collector, a cloth bag dust collector, a draught fan, an exhaust funnel and a PLC control system, wherein the floccule separation chamber is closely connected with a crusher; a cyclone is located downstream of and connected to the floe separation chamber in the process flow direction; the bag dust collector is positioned at the downstream of the cyclone dust collector in the process flow direction and is connected with the cyclone dust collector; the induced draft fan is positioned at the downstream of the bag dust collector in the process flow direction and is connected with the bag dust collector; the exhaust funnel is positioned at the downstream of the induced draft fan in the process flow direction and is connected with the induced draft fan; the PLC control system is respectively connected with the floccule separation chamber, the cyclone dust collector, the cloth bag dust collector and the induced draft fan so as to control the operation of the floccule separation chamber, the cyclone dust collector, the cloth bag dust collector and the induced draft fan. The utility model discloses a broken dust collecting system of steel scrap can realize gathering dust and the separation operation of light material simultaneously, and it is effectual to gather dust, simple structure and with low costs.
Description
Technical Field
The utility model belongs to the technical field of the broken technique of retrieving of steel scrap and specifically relates to a broken dust collecting system of steel scrap is related to.
Background
When scrap steel is crushed and produced, a large amount of non-steel light substances such as plastics, rubber, sponge, heat insulation cotton and the like are mixed in raw materials, and the light substances enter a dust collecting system in the crushing process, so that a series of problems such as blockage of the dust collecting system, unsmooth blanking and the like are easily caused. In addition, a large amount of dust is mixed in the light substances such as the crushed sponge, the crushed plastic and the like and enters a subsequent conveying system and a magnetic separation system along with the scrap steel, so that the problems of dust emission in a workshop, poor product quality and the like are caused. The conventional solution at present is to add an air separation device before magnetic separation to realize the separation of light substances, and the scheme has the following problems:
(1) when sponge light substances are mixed in the crushed raw materials, cotton wool can enter a dust collecting system in the crushing process, and the dust collecting system is blocked;
(2) the crushing line needs a dust collecting system and an air separation system, is equivalent to two sets of dust collecting devices, and has large occupied area and high investment and operation cost;
(3) the crushed materials need to be conveyed by devices such as a rubber belt conveyor and the like before air separation, and the dust in a workshop is large in the conveying process;
(4) the local temperature of the broken product is high, and the subsequent conveying system is easily damaged by high temperature.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a broken dust collecting system of steel scrap can realize gathering dust and the separation operation of light material simultaneously, and it is effectual to gather dust, simple structure and with low costs.
According to the utility model discloses broken dust collecting system of steel scrap, include:
the floccule separating chamber is closely connected with the crusher and is used for filtering and treating floccules in the dust-containing tail gas from the crusher and obtaining primary pretreated dust-containing tail gas;
the cyclone dust collector is positioned at the downstream of the floccule separation chamber in the process flow direction, is connected with the floccule separation chamber, and is used for separating large-particle dust in the primary pretreated dust-containing tail gas and obtaining secondary pretreated dust-containing tail gas;
the bag dust collector is positioned at the downstream of the cyclone dust collector in the process flow direction, is connected with the cyclone dust collector, and is used for separating small particle dust in secondary pre-treated dust-containing tail gas and obtaining clean tail gas;
the induced draft fan is positioned at the downstream of the bag dust collector in the process flow direction, is connected with the bag dust collector and is used for enabling the dust collection system to form negative pressure so as to draft the crusher;
the exhaust funnel is positioned at the downstream of the induced draft fan in the process flow direction, is connected with the induced draft fan and is used for exhausting clean air;
PLC control system, PLC control system respectively with the flocculus separating chamber cyclone dust collector cloth bag dust collector with the draught fan links to each other, in order to control the flocculus separating chamber cyclone dust collector cloth bag dust collector with the operation of draught fan.
According to the utility model discloses broken dust collecting system of steel scrap, the working process is: the dust collection system is in a negative pressure environment by starting the induced draft fan, the crusher can be drafted, therefore, dusty tail gas from the crusher can enter the floccule separation chamber, floccules such as waste plastics, waste sponge, waste rubber and the like in the dusty tail gas are filtered out by the floccule separation chamber to obtain primary pretreated dusty tail gas, thereby avoiding unsmooth blanking of process dust collection equipment and post-process dust collection equipment after the floccules block, large particle dust in the primary pretreated dusty tail gas is filtered out by the cyclone dust collector to obtain secondary pretreated dusty tail gas after the primary pretreated dusty tail gas enters the cyclone dust collector, small particle dust in the secondary pretreated dusty tail gas is filtered out by the cloth bag dust collector to obtain clean tail gas, and the filtered clean tail gas enters the induced draft fan to be discharged by the exhaust funnel, therefore, dust collection of the dust-containing tail gas is realized, the dust collection effect is good, and meanwhile, floccules and dust are effectively separated; the floccule, the large-particle dust, the small-particle dust and the like can be recycled and sold for use, so that the resources can be saved and the income can be improved; the PLC control system is used for controlling the operation of the floccule separation chamber, the cyclone dust collector, the cloth bag dust collector and the induced draft fan, so that the working strength of workers is reduced; in addition, the scrap steel crushing and dust collecting system is simple in structure, small in occupied area and capable of effectively reducing cost.
According to the utility model discloses an embodiment, broken dust collecting system of scrap steel still includes:
the fluidized vibration conveyor comprises a shell, wherein the shell defines a closed conveying space for conveying broken scrap steel materials; a material outlet communicated with the closed material conveying space is formed in the bottom of the shell and is used for being connected with a post-process magnetic separation system; the bottom of the shell is obliquely arranged, the bottom of the shell comprises a feeding section and an air distribution section, the feeding section is higher than the air distribution section in the oblique direction of the bottom of the shell, and the air distribution section is higher than the material outlet in the oblique direction of the bottom of the shell; a plurality of air holes are formed in the air distribution section; the top of the shell is provided with a material inlet opposite to the feeding section and an exhaust port opposite to the air distribution section and the material outlet, the material inlet is hermetically connected with the crusher, and the exhaust port is hermetically connected with the floccule separation chamber;
the vibration motor is positioned below the feeding section and is fixed with the feeding section;
and the air blower is connected with the air distribution section through an air pipe and is used for blowing air to the air distribution section.
The PLC control system is also respectively connected with the vibration motor and the blower to control the operation of the fluidization vibration conveyor and the blower.
According to a further embodiment of the present invention, the fluidized vibration conveyor is connected to the pipeline between the crusher and the floc separation chamber, between the fluidized vibration conveyor and the floc separation chamber, between the floc separation chamber and the cyclone dust collector, between the cyclone dust collector and the bag dust collector, between the bag dust collector and the induced draft fan, and between the induced draft fan and the exhaust funnel by pipelines, and the fluidized vibration conveyor is connected to the pipeline between the crusher and the floc separation chamber by a branch pipe; and the pipeline between the crusher and the floccule separation chamber and the pipeline between the floccule separation chamber and the cyclone dust collector are respectively provided with an explosion relief valve.
According to an embodiment of the present invention, the floc separation chamber comprises:
the air inlet is formed in the upper portion of one side of the cylinder body, and the top end of the air inlet is close to the top end of the cylinder body; the cylinder body is provided with an oblique cut, the upper part of the oblique cut is opposite to the air inlet, the top end of the oblique cut extends to the top end of the cylinder body, the bottom end of the oblique cut is positioned on the other side of the cylinder body opposite to the air inlet, and the bottom end of the oblique cut is lower than the bottom of the air inlet;
the wind shield is fixed in the oblique notch in a matching mode, and a plurality of filtering holes are formed in the lower portion of the wind shield;
the air outlet box is connected with the barrel and is positioned above the wind shield, and an air outlet is formed in the air outlet box;
the first ash bucket is located below the barrel and communicated with the barrel in the up-down direction, and a first ash discharge port is formed in the first ash bucket.
According to the utility model discloses further embodiment, the flocculus separating chamber still includes a inverter motor, a inverter motor sets up the below of first ash discharge mouth, PLC control system with a inverter motor links to each other, with control a inverter motor's operation.
According to a still further embodiment of the present invention, the floc separation chamber further comprises a first level gauge and a vibrator, the first level gauge is disposed on an inner wall surface of a top of the cylinder for monitoring a level of the material in the first hopper; the frequency of the first variable frequency motor is interlocked with the set material level of the first material level meter through the PLC control system; the vibrator is arranged on the outer surface of the side wall of the first ash bucket, and the vibrator and the first material level meter are interlocked through the PLC control system.
According to the utility model discloses still further embodiment, the flocculus separation chamber still includes the blowback subassembly, the blowback subassembly includes blowback house steward, a plurality of blowback branch pipes, gas bag, cuts off valve and pressure differential monitoring unit fast, wherein, a plurality of one end of blowback branch pipe is dispersed to be arranged and is faced the upper surface of deep bead, a plurality of the other end of blowback branch pipe with the blowback house steward is linked together, the blowback house steward pass through the gas bag and link to each other with the air supply; the pressure difference monitoring unit is used for monitoring the pressure difference between the air inlet and the air outlet, and the pressure difference monitoring unit and the quick cutting-off valve are interlocked through the PLC control system.
According to an embodiment of the utility model, the lower part of the cyclone dust collector is a second ash bucket, the second ash bucket is provided with a second ash discharge port, and a second variable frequency motor for automatic continuous ash discharge is arranged below the second ash discharge port; and a second charge level indicator is arranged on the cyclone dust collector and used for monitoring the charge level in the second ash hopper, and the variability of the second variable frequency motor and the set charge level of the second charge level indicator are interlocked through the PLC control system.
According to the utility model discloses an embodiment, the lower part of sack dust collector is provided with a plurality of third ash buckets, each the third ash bucket all is equipped with third ash discharge opening, each the both sides face contained angle of third ash bucket is greater than 70 and is less than 180, each the third ash bucket the below of third ash discharge opening is equipped with third inverter motor, each be equipped with the third charge level indicator in the third ash bucket, be used for detecting respectively and correspond the material level in the third ash bucket, third inverter motor's variability with the settlement material level of third charge level indicator passes through PLC control system interlocking.
According to the utility model discloses an embodiment, the draught fan is fourth inverter motor, drawThe pressure head of the draught fan is 4.0-6.0 kPa, and the air volume of the draught fan is 30000-150000 m3And h, interlocking the frequency of the induced draft fan and an outlet pipeline pressure detection unit positioned on the crusher through the PLC control system so as to maintain the outlet air pressure of the crusher to be less than-500 Pa.
According to an embodiment of the present invention, the blowing pressure of the blower is greater than 6 to 10kPa, and the blowing amount of the blower is 5000 to 30000Nm3/h。
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is the utility model discloses broken dust collecting system's of scrap steel structure sketch map.
Reference numerals:
scrap steel crushing and dust collecting system 1000
Crusher 1
Third dust hopper 51 and third variable frequency motor 52 of bag dust collector 5
Draught fan 6, fourth variable frequency motor 61
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout or elements having like or similar functions. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
A scrap crushing and dust collecting system 1000 according to an embodiment of the present invention will be described with reference to fig. 1.
As shown in fig. 1, according to the scrap steel crushing and dust collecting system 1000 of the embodiment of the present invention, including the floccule separation chamber 3, the cyclone dust collector 4, the cloth bag dust collector 5, the induced draft fan 6, the exhaust funnel 7 and the PLC control system, the floccule separation chamber 3 is hermetically connected to the crusher 1, and is used for filtering floccule in the dust-containing tail gas from the crusher 1 and obtaining a first-stage pretreated dust-containing tail gas; the cyclone dust collector 4 is positioned at the downstream of the floccule separation chamber 3 in the process flow direction, is connected with the floccule separation chamber 3 and is used for separating large particle dust in the first-stage pretreated dust-containing tail gas and obtaining second-stage pretreated dust-containing tail gas; the bag dust collector 5 is positioned at the downstream of the cyclone dust collector 4 in the process flow direction, is connected with the cyclone dust collector 4 and is used for separating small-particle dust in the secondary pre-treated dust-containing tail gas and obtaining clean tail gas; the induced draft fan 6 is positioned at the downstream of the bag dust collector 5 in the process flow direction, is connected with the bag dust collector 5, and is used for enabling the dust collecting system to form negative pressure so as to draft the crusher 1 and conveying clean tail gas to the exhaust funnel 7; the exhaust funnel 7 is positioned at the downstream of the induced draft fan 6 in the process flow direction, is connected with the induced draft fan 6 and is used for exhausting clean air; the PLC control system is respectively connected with the floccule separation chamber 3, the cyclone dust collector 4, the cloth bag dust collector 5 and the induced draft fan 6 so as to control the operation of the floccule separation chamber 3, the cyclone dust collector 4, the cloth bag dust collector 5 and the induced draft fan 6.
According to the utility model discloses broken dust collecting system 1000 of steel scrap, the working process is: the dust collection system is in a negative pressure environment by starting the draught fan 6, the crusher 1 can be drafted, therefore, dust-containing tail gas from the crusher 1 can enter the floccule separation chamber 3, floccules in the dust-containing tail gas, such as waste plastics, waste sponge, waste rubber and the like, are filtered out through the floccule separation chamber 3 to obtain primary pretreated dust-containing tail gas, thereby avoiding unsmooth blanking of process dust collection equipment and post-process dust collection equipment after the floccules are blocked, the primary pretreated dust-containing tail gas enters the cyclone dust collector 4, large-particle dust in the primary pretreated dust-containing tail gas is filtered out through the cyclone dust collector 4 to obtain secondary pretreated dust-containing tail gas, the secondary pretreated dust-containing tail gas enters the cloth bag dust collector 5, small-particle dust in the secondary pretreated dust-containing tail gas is filtered out through the cloth bag dust collector 5 to obtain clean tail gas, the clean tail gas enters the draught fan 6 and is discharged through the exhaust funnel 7, therefore, dust collection of the dust-containing tail gas is realized, the dust collection effect is good, and meanwhile, floccules and dust are effectively separated; the floccule, the large-particle dust, the small-particle dust and the like can be recycled and sold for use, so that the resources can be saved and the income can be improved; the operation of the floccule separation chamber 3, the cyclone dust collector 4, the cloth bag dust collector 5 and the induced draft fan 6 is controlled by the PLC control system, so that the working strength of workers is reduced; in addition, the scrap steel crushing and dust collecting system 1000 is simple in structure, small in occupied area and capable of effectively reducing cost.
According to an embodiment of the utility model, the scrap steel crushing and dust collecting system 1000 further comprises a fluidization vibration conveyor 2, the fluidization vibration conveyor 2 comprises a shell 21, a vibration motor 22 and a blower 23, the shell 21 defines a closed conveying space for conveying scrap steel crushed materials; the bottom of the shell 21 is provided with a material outlet communicated with the closed material conveying space, and the material outlet is used for being connected with a post-process magnetic separation system; the bottom of the shell 21 is obliquely arranged, the bottom of the shell 21 comprises a feeding section and an air distribution section, the feeding section is higher than the air distribution section in the oblique direction of the bottom of the shell 21, and the air distribution section is higher than the material outlet in the oblique direction of the bottom of the shell 21; the air distribution section is provided with a plurality of air holes; the top of the shell 21 is provided with a material inlet opposite to the feeding section and an exhaust port opposite to the air distribution section and the material outlet, the material inlet is hermetically connected with the crusher 1, and the exhaust port is hermetically connected with the floccule separation chamber 3; the vibration motor 22 is positioned below the feeding section and fixed with the feeding section; the blower 23 is connected with the air distribution section through an air pipe and is used for blowing air to the air distribution section; the PLC control system is also connected to the vibration motor 22 and the blower 23, respectively, to control the operation of the fluidizing vibratory conveyor 2 and the blower 23. It can be understood that the broken material of steel scrap that crusher 1 carried out gets into in the airtight defeated material space by the material entry, because the material entry is relative with the feedshoe, the broken material of steel scrap falls on the feedshoe, under the vibration of vibrating motor 22, the broken material of steel scrap distribution on the feedshoe is evenly along the bottom incline direction downstream of casing 21, and can make light material be located the upper strata and heavy material be located the lower floor at the in-process of vibration. When the broken steel scrap material moves onto the air distribution plate, the high-speed airflow conveyed by the air blower 23 passes through the air holes in the air distribution plate to blow up light substances in the broken steel scrap material, so that the light substances such as plastics, rubber, sponge and other large-particle substances are fluidized and enter the dust collection system from the air outlet in the form of dust-containing tail gas under the action of negative-pressure air draft of the induced draft fan 6, and the remaining heavy substances, namely the broken material subjected to vibration fluidization pretreatment, continuously move downwards along the bottom oblique direction of the shell 21 and enter the post-process magnetic separation system from the material outlet. Meanwhile, the high-speed airflow blown from the blast port has the functions of heat dissipation and temperature reduction on the pretreated crushed materials. Therefore, the fluidized vibrating conveyor 2 can effectively separate dust and light substances in the steel scrap crushing material output by the crusher 1, thereby reducing the flying dust in the subsequent transportation process and improving the operation environment. In addition, the fluidization vibration conveyor 2 has a simple structure, is convenient to install, occupies a small area, and can be installed below the crusher 1. Experiments prove that the fluidization vibration conveyor 2 can be used for conveying 5-100 t/h of materials, the granularity of the materials is less than 300mm, the temperature of the materials is less than 300 ℃, the conveying distance is 3-10 m, and the fluidization vibration conveyor 2 can be used in other industries needing effective separation of dust-containing particles and light substances.
Preferably, the fluidization vibration conveyor 2 is in flexible connection with the crusher 1, the fluidization vibration conveyor 2 is in flexible connection with the floccule separation chamber 3, and the fluidization vibration conveyor 2 is in flexible connection with the air pipe.
According to the utility model discloses further embodiment, between breaker 1 and flocculus separating chamber 3, between fluidization vibration conveyer 2 and flocculus separating chamber 3, between flocculus separating chamber 3 and cyclone 4, between cyclone 4 and cloth bag dust collector 5, between cloth bag dust collector 5 and draught fan 6 and between draught fan 6 and aiutage 7 all through the tube coupling, fluidization vibration conveyer 2 passes through the branch pipe and links to each other with the pipeline that is located between breaker 1 and flocculus separating chamber 3, from this, can avoid the raise dust in the material conveying process, improve operational environment; wherein, the pipeline between the crusher 1 and the floccule separating chamber 3 and the pipeline between the floccule separating chamber 3 and the cyclone dust collector 4 are respectively provided with an explosion relief valve, thus being capable of preventing the inflammable and explosive substances from causing safety accidents after entering the crusher 1.
According to an embodiment of the present invention, the floccule separation chamber 3 comprises a cylinder 31, a wind shield, an air outlet box 32 and a first ash bucket 33, wherein an air inlet is arranged at the upper part of one side of the cylinder 31, and the top end of the air inlet is close to the top end of the cylinder 31; the cylinder body 31 is provided with an oblique cut, the upper part of the oblique cut is opposite to the air inlet, the top end of the oblique cut extends to the top end of the cylinder body 31, the bottom end of the oblique cut is positioned at the other side of the cylinder body 31 opposite to the air inlet, and the bottom end of the oblique cut is lower than the bottom of the air inlet; the wind shield is fixed in the oblique notch in a matching way, and the lower part of the wind shield is provided with a plurality of filtering holes; the air outlet box 32 is connected with the cylinder 31 and is positioned above the wind shield, and the air outlet box 32 is provided with an air outlet; the first ash bucket 33 is located below the cylinder 31 and is communicated with the cylinder 31 in the up-down direction, and the first ash bucket 33 is provided with a first ash discharge port. It can be understood that the dust-containing tail gas enters the cylinder 31 through the air inlet, the flow velocity of the dust-containing tail gas in the cylinder 31 is reduced due to the fact that the volume of the cylinder 31 is increased, the dust-containing tail gas runs into the wind shield in the low-speed advancing process and then moves downwards along the wind shield in an inclined mode, the lower portion of the wind shield is provided with a plurality of filtering holes, the first-stage pretreated dust-containing tail gas enters the wind box 32 through the filtering holes and is discharged into the post-process dust collecting equipment from the air outlet, floccules, such as waste sponge, waste plastic, waste rubber and other large granular substances, in the dust-containing tail gas, which are larger than the aperture of the filtering holes are blocked by the filtering holes and continue to move downwards and fall into the first ash hopper 33 due to the inertia effect, and therefore the floccules are prevented from blocking the post-process dust collecting equipment and causing unsmoo. In addition, the floccule separation chamber 3 has a simple structure and a small footprint.
It should be noted that the inner diameter of the first ash discharge opening is larger than 800mm, and the included angle of the side wall of the first ash bucket 33 is smaller than 40 degrees, so that the first ash bucket 33 is convenient to discharge.
According to the utility model discloses further embodiment, flocculus separating chamber 3 still includes first inverter motor 34, and first inverter motor 34 sets up in the below of first ash discharge mouth, and PLC control system links to each other with first inverter motor 34 to control the operation of first inverter motor 34. It can be understood that first inverter motor 34 links to each other with first ash discharge mouth lower extreme, through the operation of first inverter motor 34 of PLC control system control for the floccule in first ash bucket 33 can automatic even ash discharge in succession, and can guarantee to have certain material level in the first ash bucket 33 all the time, thereby realizes the material and seals, effectively reduces the hourglass wind.
According to a still further embodiment of the present invention, the floc separation chamber 3 further comprises a first level gauge and a vibrator, the first level gauge being provided on the inner wall surface of the top of the cylinder 31 for monitoring the level of the material in the first hopper 33; the frequency of the first variable frequency motor 34 is interlocked with the set material level of the first material level meter through a PLC control system; the vibrator is arranged on the outer surface of the side wall of the first ash bucket 33, and the vibrator and the first material level meter are interlocked through a PLC control system. It will be appreciated that a first level indicator is provided at the top of the barrel 31 to facilitate sensing of the level of material in the first hopper 33; the frequency of the first variable frequency motor 34 can be changed along with the change of the material level in the first ash hopper 33, the material level in the first ash hopper 33 is monitored through the first material level meter, and when the material level in the first ash hopper 33 is higher than the set material level, the frequency of the first variable frequency motor 34 is changed through the PLC control system, so that the material level in the first ash hopper 33 is recovered to the set material level; the first material level meter, the first variable frequency motor 34 and the PLC control system can realize automatic and continuous ash discharge and ensure that a certain material level is always in the first ash hopper 33, thereby realizing material sealing and effectively reducing air leakage; when the first material level indicator monitors that the material level in the first ash bucket 33 is higher than the set material level, the PLC control system starts the vibrator to assist in ash discharge, and when the first material level indicator monitors that the material level in the first ash bucket 33 is recovered to the set material level, the PLC control system closes the vibrator, so that automatic ash removal can be realized by the first material level indicator, the vibrator and the PLC control system.
According to the utility model discloses still further embodiment, flocculus separating chamber 3 still includes the blowback subassembly, and the blowback subassembly includes blowback house steward, a plurality of blowback branch pipes, gas bag, cuts off valve and pressure differential monitoring unit fast, and wherein, the one end of a plurality of blowback branch pipes is dispersed to be arranged and is towards the upper surface of deep bead, and the other end of a plurality of blowback branch pipes is linked together with the blowback house steward, and the gas bag that passes through of blowback house steward links to each other with the air supply; the pressure difference monitoring unit is used for monitoring the pressure difference between the air inlet and the air outlet, and the pressure difference monitoring unit and the quick cutting-off valve are interlocked through a PLC control system. It can be understood that one end of the back-blowing main pipe is a back-blowing inlet, the air bag is connected with the back-blowing inlet, when the pressure difference monitoring unit monitors that the pressure difference between the air inlet and the air outlet is higher than a set value, the quick cutting-off valve is automatically started, air in the air bag enters the back-blowing main pipe through the back-blowing inlet, and then the back-blowing branch pipes are used for back-blowing the wind shield, so that materials blocked on the wind shield are back-blown into the first ash hopper 33; after the back blowing is finished, when the pressure difference monitoring unit monitors that the pressure difference between the air inlet and the air outlet is recovered to a set value, the valve is automatically closed and quickly cut off, therefore, sundries blocked on the wind shield can be back blown into the first ash hopper 33, and the normal operation of floccule separation operation is ensured.
According to an embodiment of the present invention, the lower portion of the cyclone dust collector 4 is a second dust hopper 41, the second dust hopper 41 is provided with a second dust discharge port, the first-stage pretreated dust-containing tail gas enters the interior of the cyclone dust collector 4, after treatment, the second-stage pretreated dust-containing tail gas is conveyed to the bag dust collector 5 through a pipeline, and large particle dust in the first-stage pretreated dust-containing tail gas falls into the second dust hopper 41 and is discharged through the second dust discharge port; a second variable frequency motor 42 for automatically and continuously discharging ash is arranged below the second ash discharge port, the second variable frequency motor 42 is connected with the lower end of the second ash discharge port, and the operation of the second variable frequency motor 42 is controlled by a PLC control system, so that large-particle dust in the second ash hopper 41 can be automatically and continuously and uniformly discharged, a certain material level can be ensured in the second ash hopper 41 all the time, material sealing is realized, and air leakage is effectively reduced; the cyclone dust collector 4 is provided with a second material level meter for monitoring the material level in the second ash hopper 41, and the variability of the second variable frequency motor 42 is interlocked with the set material level of the second material level meter through a PLC control system, so that the second material level meter can conveniently detect the material level in the second ash hopper 41; the frequency of the second variable frequency motor 42 can be changed along with the change of the material level in the second ash hopper 41, the material level in the second ash hopper 41 is monitored through a second material level meter, and when the material level in the second ash hopper 41 is higher than the set material level, the frequency of the second variable frequency motor 42 is changed through the PLC control system so that the material level in the second ash hopper 41 is recovered to the set material level; the second material level meter, the second variable frequency motor 42 and the PLC control system can realize automatic continuous ash discharge, and ensure that a certain material level is always arranged in the second ash hopper 41, so that material sealing is realized, air leakage is effectively reduced, and ash deposition is avoided.
It should be noted that the cyclone dust collector 4 can adopt a single cylinder or a double cylinder parallel connection, and the specific form is determined according to the actual situation.
According to an embodiment of the present invention, the lower portion of the bag dust collector 5 is provided with a plurality of third dust hoppers 51, each third dust hopper 51 is provided with a third dust discharge port, the second-stage pre-treated dusty tail gas enters the bag dust collector 5, after treatment, the clean tail gas is discharged after being conveyed to the exhaust funnel 7 through a pipeline, and the small particle dust in the second-stage pre-treated dusty tail gas falls into the plurality of third dust hoppers 51 and is discharged through the plurality of third dust discharge ports respectively; the included angle of the two side surfaces of each third ash bucket 51 is more than 70 degrees and less than 180 degrees, so that the blanking of the plurality of third ash buckets 51 can be facilitated; a third variable frequency motor 52 is arranged below a third ash discharge port of each third ash bucket 51, the third variable frequency motors 52 are respectively connected with the lower ends of the third ash discharge ports, and the operation of the third variable frequency motors 52 is controlled by a PLC control system, so that large-particle dust in the third ash buckets 51 can be automatically, continuously and uniformly discharged, a certain material level can be ensured in the third ash buckets 51 all the time, material sealing is realized, and air leakage is effectively reduced; a third material level meter is arranged in each third ash bucket 51 and is respectively used for detecting the material level in the corresponding third ash bucket 51, and the variability of a third variable frequency motor 52 is interlocked with the set material level of the third material level meter through a PLC control system, so that the plurality of third material level meters can conveniently and respectively detect the material level in the plurality of third ash buckets 51; the frequency of the third variable frequency motors 52 can be changed along with the change of the material level in the third ash hoppers 51, the material level in the third ash hoppers 51 is monitored through the third material level meters, and when the material level in one or more third ash hoppers 51 is higher than the set material level, the frequency of the third variable frequency motor 52 is changed through the PLC control system, so that the material level in the third ash hopper 51 is restored to the set material level; a plurality of third charge level indicators, a plurality of third inverter motor 52 and PLC control system can realize automatic ash discharge in succession to have certain material level all the time in guaranteeing a plurality of third ash buckets 51, thereby realize the material and seal, effectively reduce and leak, avoid the deposition.
Preferably, the size of the third inverter motor 52 is 500mm to 1000mm, and the number of the third dust hoppers 51 may be 3 to 6.
According to the utility model discloses an embodiment, draught fan 6 is fourth inverter motor 61, and draught fan 6's fan pressure head is 4.0 ~ 6.0kPa, and draught fan 6's amount of wind is 30000 ~ 150000m3And h, interlocking the frequency of the induced draft fan 6 with an outlet pipeline pressure detection unit positioned on the crusher 1 through a PLC control system to maintain the outlet air pressure of the crusher 1 to be less than-500 Pa. It can be understood that when the outlet pipe pressure detecting unit located at the crusher 1 detects that the pressure at the outlet of the crusher 1 is abnormal, the frequency of the fourth variable frequency motor 61 is controlled by the PLC control system, so that the pressure at the outlet of the crusher 1 is restored to the normal pressure.
According to an embodiment of the present invention, the blowing pressure of the blower 23 is greater than 6 to 10kPa, and the blowing amount of the blower 23 is 5000 to 30000Nm3H is used as the reference value. Preferably, the blower 23 is a positive displacement blower 23, such as a roots blower, to effectively ensure fluidization air.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, a schematic representation of the above terms does not necessarily refer to the same embodiment or example of the case. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. The utility model provides a broken dust collecting system of scrap steel which characterized in that includes:
the floccule separating chamber is closely connected with the crusher and is used for filtering and treating floccules in the dust-containing tail gas from the crusher and obtaining primary pretreated dust-containing tail gas;
the cyclone dust collector is positioned at the downstream of the floccule separation chamber in the process flow direction, is connected with the floccule separation chamber, and is used for separating large-particle dust in the primary pretreated dust-containing tail gas and obtaining secondary pretreated dust-containing tail gas;
the bag dust collector is positioned at the downstream of the cyclone dust collector in the process flow direction, is connected with the cyclone dust collector, and is used for separating small particle dust in secondary pre-treated dust-containing tail gas and obtaining clean tail gas;
the induced draft fan is positioned at the downstream of the bag dust collector in the process flow direction, is connected with the bag dust collector and is used for enabling the dust collection system to form negative pressure so as to draft the crusher;
the exhaust funnel is positioned at the downstream of the induced draft fan in the process flow direction, is connected with the induced draft fan and is used for exhausting clean air;
PLC control system, PLC control system respectively with the flocculus separating chamber cyclone dust collector cloth bag dust collector with the draught fan links to each other, in order to control the flocculus separating chamber cyclone dust collector cloth bag dust collector with the operation of draught fan.
2. The scrap steel breaking dust collecting system according to claim 1 further comprising:
the fluidized vibration conveyor comprises a shell, wherein the shell defines a closed conveying space for conveying broken scrap steel materials; a material outlet communicated with the closed material conveying space is formed in the bottom of the shell and is used for being connected with a post-process magnetic separation system; the bottom of the shell is obliquely arranged, the bottom of the shell comprises a feeding section and an air distribution section, the feeding section is higher than the air distribution section in the oblique direction of the bottom of the shell, and the air distribution section is higher than the material outlet in the oblique direction of the bottom of the shell; a plurality of air holes are formed in the air distribution section; the top of the shell is provided with a material inlet opposite to the feeding section and an exhaust port opposite to the air distribution section and the material outlet, the material inlet is hermetically connected with the crusher, and the exhaust port is hermetically connected with the floccule separation chamber;
the vibration motor is positioned below the feeding section and is fixed with the feeding section;
the air blower is connected with the air distribution section through an air pipe and used for blowing air to the air distribution section;
the PLC control system is also respectively connected with the vibration motor and the blower to control the operation of the fluidization vibration conveyor and the blower.
3. The scrap steel crushing and dust collecting system according to claim 2, wherein the crusher and the floc separation chamber, the fluidized vibrating conveyor and the floc separation chamber, the floc separation chamber and the cyclone, the cyclone and the bag collector, the bag collector and the induced draft fan and the exhaust funnel are all connected by pipelines, and the fluidized vibrating conveyor is connected with a pipeline between the crusher and the floc separation chamber through a branch pipe; and the pipeline between the crusher and the floccule separation chamber and the pipeline between the floccule separation chamber and the cyclone dust collector are respectively provided with an explosion relief valve.
4. The scrap steel crushing and dust collecting system according to claim 1 wherein the floc separation chamber comprises:
the air inlet is formed in the upper portion of one side of the cylinder body, and the top end of the air inlet is close to the top end of the cylinder body; the cylinder body is provided with an oblique cut, the upper part of the oblique cut is opposite to the air inlet, the top end of the oblique cut extends to the top end of the cylinder body, the bottom end of the oblique cut is positioned on the other side of the cylinder body opposite to the air inlet, and the bottom end of the oblique cut is lower than the bottom of the air inlet;
the wind shield is fixed in the oblique notch in a matching mode, and a plurality of filtering holes are formed in the lower portion of the wind shield;
the air outlet box is connected with the barrel and is positioned above the wind shield, and an air outlet is formed in the air outlet box;
the first ash bucket is located below the barrel and communicated with the barrel in the up-down direction, and a first ash discharge port is formed in the first ash bucket.
5. The scrap steel crushing and dust collecting system according to claim 4, wherein the flocculent separation chamber further comprises a first variable frequency motor, the first variable frequency motor is arranged below the first ash discharge port, and the PLC control system is connected with the first variable frequency motor to control the operation of the first variable frequency motor.
6. The scrap steel breaking and dust collecting system according to claim 5, wherein the floc separation chamber further comprises a first level gauge and a vibrator, the first level gauge being disposed on an inner wall surface of a top of the cylinder for monitoring a level of the material in the first ash hopper; the frequency of the first variable frequency motor is interlocked with the set material level of the first material level meter through the PLC control system; the vibrator is arranged on the outer surface of the side wall of the first ash bucket, and the vibrator and the first material level meter are interlocked through the PLC control system.
7. The scrap steel crushing and dust collecting system according to claim 6, wherein the flocculent separation chamber further comprises a back-blowing assembly, the back-blowing assembly comprises a back-blowing main pipe, a plurality of back-blowing branch pipes, an air bag, a quick cutting-off valve and a pressure difference monitoring unit, wherein one ends of the back-blowing branch pipes are distributed and arranged towards the upper surface of the wind shield, the other ends of the back-blowing branch pipes are communicated with the back-blowing main pipe, and the back-blowing main pipe is connected with an air source through the air bag; the pressure difference monitoring unit is used for monitoring the pressure difference between the air inlet and the air outlet, and the pressure difference monitoring unit and the quick cutting-off valve are interlocked through the PLC control system.
8. The scrap steel crushing and dust collecting system according to claim 1, wherein a second ash hopper is arranged at the lower part of the cyclone dust collector, the second ash hopper is provided with a second ash discharge port, and a second variable frequency motor for automatically and continuously discharging ash is arranged below the second ash discharge port; and a second charge level indicator is arranged on the cyclone dust collector and used for monitoring the charge level in the second ash hopper, and the variability of the second variable frequency motor and the set charge level of the second charge level indicator are interlocked through the PLC control system.
9. The broken dust collecting system of scrap steel according to claim 1, wherein the lower part of the bag house is provided with a plurality of third ash hoppers, each third ash hopper is provided with a third ash discharge port, the included angle of the two side faces of each third ash hopper is greater than 70 degrees and less than 180 degrees, a third variable frequency motor is arranged below the third ash discharge port of each third ash hopper, a third level indicator is arranged in each third ash hopper and is respectively used for detecting the corresponding material level in the third ash hopper, and the variability of the third variable frequency motor and the set material level of the third level indicator are interlocked through the PLC control system.
10. The scrap steel crushing and dust collecting system according to claim 1, wherein the induced draft fan is a fourth variable frequency motor, the pressure head of the induced draft fan is 4.0-6.0 kPa, and the air volume of the induced draft fan is 30000-150000 m3And h, interlocking the frequency of the induced draft fan and an outlet pipeline pressure detection unit positioned on the crusher through the PLC control system so as to maintain the outlet air pressure of the crusher to be less than-500 Pa.
11. The scrap steel crushing and dust collecting system according to claim 2, wherein the blowing pressure of the blower is more than 6 to 10kPa, and the blowing amount of the blower is 5000 to 30000Nm3/h。
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| CN201922265317.9U CN211989132U (en) | 2019-12-16 | 2019-12-16 | Scrap steel crushing and dust collecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961238A (en) * | 2019-12-16 | 2020-04-07 | 中国恩菲工程技术有限公司 | Scrap steel crushing and dust collecting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961238A (en) * | 2019-12-16 | 2020-04-07 | 中国恩菲工程技术有限公司 | Scrap steel crushing and dust collecting system |
| CN110961238B (en) * | 2019-12-16 | 2024-07-23 | 中国恩菲工程技术有限公司 | Broken dust collecting system of steel scrap |
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