CN105561691A - Waste gas purification system for acetylene generator calcium carbide canopy and operating method thereof - Google Patents
Waste gas purification system for acetylene generator calcium carbide canopy and operating method thereof Download PDFInfo
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Abstract
The invention relates to a waste gas purification system for acetylene generator calcium carbide canopy and an operating method thereof. The system mainly comprises a dust removal unit mainly formed by transversely extending and assembly multiple pairs of special anti-explosion pulse bag filters, the pairs of pulse bag filters are arranged in the longitudinal direction, inner cavities of the two adjacent pulse bag filters in each row of pulse bag filters transversely arranged are hermetically communicated, two transverse ends of the dust removal unit are provided with a waste gas inlet and a purified gas outlet, the waste gas inlet and the purified gas outlet are hermetically communicated with the inner cavities of the pulse bag filters at the two transverse ends of the dust removal unit, respectively, and a partition for directing waste gas respectively into the two rows of pulse bag filters is disposed inside the waste gas inlet; it is possible to set the quantity of the pulse bag filters in each row of pulse bag filters flexibly according to ash generations of different operating places of calcium carbide, thus obtaining a set waste gas treatment quantity; the partition can direct the waste gas more evenly into the two rows of pulse bag filters; the pulse bag filters are equal in the two rows so that two gas flows bear equal flow resistance.
Description
Technical field
The present invention relates to a kind of waste gas cleaning system, particularly acetylene generator calcium carbide awning waste gas cleaning system and method for work thereof, the inflammable and explosive waste gas of dust-laden in calcium carbide process is purified.
Background technology
Dust removal process of the prior art generally adopts sack cleaner, if Patent document number is the pulsed jet cloth filter described in the Chinese patent literature of CN104707411A, may be used in the few production line of dust generation and production process, but in the larger production process of dust generation, as the Calcium Carbide Ash for the production of acetylene, calcium carbide particle and acetylene gas processing procedure, only adopt one or two pulsed jet cloth filter can not meet real-time ash disposal, the requirement of purifying exhaust air, simultaneously because handling object belongs to high inflammable, explosive, can not the particular/special requirement such as contact position moisture, the dust separation system be combined into by multiple extraordinary explosion-proof type pulsed jet cloth filter is needed to process.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of acetylene generator calcium carbide awning waste gas cleaning system and method for work thereof, can set the treating capacity of waste gas according to the different ash material generations in calcium carbide throughout reason process.
Described acetylene generator calcium carbide awning waste gas cleaning system comprises: extend transversely primarily of multipair extraordinary explosion-proof type pulsed jet cloth filter, the dust removing units assembled, each paired pulses sack cleaner is longitudinally arranged, the bore seal of often arranging adjacent pulse sack cleaner in pulsed jet cloth filter is transversely communicated with, the transverse ends of dust removing units is respectively equipped with exhaust gas entrance and clean gas outlet, exhaust gas entrance and clean gas outlet are communicated with the bore seal of the pulsed jet cloth filter at dust removing units transverse ends place respectively, the dividing plate for being imported respectively by waste gas in two row's pulsed jet cloth filters is provided with in exhaust gas entrance.
Described exhaust gas entrance is caught suction hood with at least one for the waste gas converging dust-laden exhaust gas by exhaust inlet pipe and is sealed and be communicated with, and the exhaust inlet pipe that contiguous each waste gas catches suction hood place is respectively equipped with catch suction valve for control piper break-make.
Described clean gas outlet is tightly connected by the air intake of purification tracheae and blower fan, and the outlet air end of blower fan and the chimney of side are tightly connected, and the purification tracheae between clean gas outlet and blower fan is provided with the purified gas air bleeding valve of control piper break-make.
The side of described blower fan (preferred explosion-proof fan) is provided with the motor (preferred explosive-proof grade DIICT4 standard) driving blower fan, the side of motor is provided with for the liquid resistance starting drive of starter motor and the frequency converter for starting rear real-time adjustment motor speed, is provided with the switching device shifter of switching and motor connection status between liquid resistance starting drive and frequency converter.
The one-level drag conveyor (preferred power explosive-proof grade DIICT4 standard) that can receive the ash material that all pulsed jet cloth filter lower ends discharge outlet is discharged is provided with on the downside of described dust removing units, each pulsed jet cloth filter lower end discharge outlet is provided with the discharging bottom valve (preferred power explosive-proof grade DIICT4 standard) controlling ash material discharge, the right side of one-level drag conveyor is provided with two-stage scraper conveyer, the right-hand member bottom of two-stage scraper conveyer and the upper end of ash-unloading tube are tightly connected, the lower end of ash-unloading tube and being tightly connected without airborne dust dust unloadnig apparatus on the downside of it, ash-unloading tube is provided with the unloading valve (preferred power explosive-proof grade DIICT4 standard) of control piper break-make.
The top of each pulsed jet cloth filter is tightly connected with the outlet side of the pulse tracheae for removing adhesive dust on cloth bag, the inlet end of pulse tracheae seals with the air supply processing equipment of the nitrogen that can generate setting pressure and is communicated with, and the pulse tracheae at the top of contiguous each pulsed jet cloth filter is respectively equipped with the explosion-proof type pulse air valve of control piper break-make.
The inwall of exhaust inlet pipe 2, purification tracheae 8, blast pipe 11, pulse tracheae 7 and chimney 10 is all provided with the air volume meter for measuring throughput.
Described catch inhale valve, purified gas air bleeding valve, bottom valve, one-level drag conveyor, one-level drag conveyor, all automatically controlled by PLC system without airborne dust dust unloadnig apparatus, pulse air valve, unloading valve, described air volume meter is all connected with this PLC system signal.
Described motor, liquid resistance starting drive, frequency converter, switching device shifter are all controlled automatically by PLC system.
The casing middle and upper part of described exhaust inlet pipe, purification tracheae, ash-unloading tube, pulsed jet cloth filter is provided with flame proof film or venting of dust explosion mouth, to play explosion-proof effect, guarantees production safety.
The method of work of described acetylene generator calcium carbide awning waste gas cleaning system, comprises the following steps:
(1) start blower fan 9 by liquid resistance starting drive 15, then controlled the rotating speed of blower fan 9 by frequency converter 13;
(2) the calcium carbide dust that waste gas catches suction hood 3 place is inhaled into dust removing units with air, is divided into two-way respectively after each pulsed jet cloth filter 1 in front two rows carries out dust removal by filtration, purifies air by purification tracheae 8 after blower fan 9, enters the external world by chimney 10;
(3) when shutting down deashing, the purified gas air bleeding valve 5 that respectively catching on exhaust inlet pipe 2 is inhaled on valve 24 and purification tracheae 8 is closed, each pulse air valve 4 is opened, and the nitrogen with setting pressure produced by air supply processing equipment 6 enters in each pulsed jet cloth filter 1 and carries out deashing to cloth bag;
(4) bottom valve 17 is opened, the dust be deposited in bottom each pulsed jet cloth filter 1 is fallen in one-level drag conveyor 16, dust is sent in ash-unloading tube 20 by I and II drag conveyor, by the special collecting cart directly sent into by dust without airborne dust dust unloadnig apparatus 21 below it.
Relative to prior art, the technique effect that the present invention has is:
(1) each row's pulsed jet cloth filter in dust removing units is assembled by individual pulse sack cleaner, the number of often arranging pulsed jet cloth filter can be set flexibly according to the ash material in the different operating place of calcium carbide and bulky grain growing amount, thus obtain the exhaust-gas treatment amount of setting; Waste gas can more uniformly be directed in two row's pulsed jet cloth filters by dividing plate; In dust removing units, the number of two row's pulsed jet cloth filters is equal, thus makes the path of waste gas after two row's pulsed jet cloth filters identical, makes that two-way air-flow velocity is identical, flow resistance is equal, prevent air turbulence.
(2) number that waste gas catches suction hood can set according to the ash material generation in calcium carbide process place and space size, and each waste gas is caught catching of suction hood place and inhaled the ash material concentration that valve can catch suction hood place according to each waste gas and open or close.
(3) adopt single blower fan to control the intake of whole dust removing units, its structural configuration is simple, is convenient to it and is arranged in the place producing place away from calcium carbide ash material, prevent ash material from having an impact to motor.
(4) compare common electricity to start, adopt liquid resistance starting drive starter motor, the pressure drop impact produced electrical network when can reduce electric motor starting, utilizes frequency converter can control the rotating speed of motor in real time, and then controls the rotating speed of blower fan.
(5) I and II drag conveyor is utilized easily the ash material from each pulsed jet cloth filter lower end discharging opening can be delivered to ash-unloading tube, and through sending to special transport vehicle without airborne dust dust unloadnig apparatus.
(6) nitrogen with setting pressure produced by air supply processing equipment 6, can carry out deashing to each cloth bag, and the anti-flammability of nitrogen can improve the security of deashing process.
(7) air volume meter can detect the operation conditions of each parts in native system in real time, timely invention airflow obstruction position, thus is convenient to on-call maintenance process.
(8) adopt PLC to detect the numerical value of air volume meter in real time, and automatically control the discharging opening discharging process of dust removal process, deashing process and pulsed jet cloth filter, realize the automatic operating of native system, improve operating efficiency and reliability.
Accompanying drawing explanation
In order to clearly demonstrate innovative principle of the present invention and the technical advantage compared to existing product thereof, by the limiting examples applying described principle, possible embodiment is described by means of accompanying drawing below.In the drawings:
Fig. 1 is the overall schematic diagram of acetylene generator calcium carbide awning waste gas cleaning system of the present invention;
Fig. 2 is the front view comprising the dust removing units of 14 pulsed jet cloth filters of the present invention;
Fig. 3 is the right view comprising the dust removing units of 14 pulsed jet cloth filters of the present invention;
Fig. 4 is the junction partial enlargement front view of dust removing units of the present invention and blower fan;
Fig. 5 is the junction partial enlargement left view of blower fan of the present invention and chimney;
Fig. 6 is the front view comprising the dust removing units of 8 pulsed jet cloth filters of the present invention;
Fig. 7 is the right view comprising the dust removing units of 8 pulsed jet cloth filters of the present invention.
Detailed description of the invention
As Figure 1-5, acetylene generator calcium carbide awning waste gas cleaning system of the present invention, comprise: extraordinary explosion-proof type pulsed jet cloth filter 1, exhaust inlet pipe 2, waste gas catches suction hood 3, explosion-proof type pulse air valve 4, explosion-proof type purified gas air bleeding valve 5, air supply processing equipment 6, pulse tracheae 7, purification tracheae 8, explosion-proof type blower fan 9, chimney 10, blast pipe 11, explosion-proof motor 12, frequency converter 13, switching device shifter 14, liquid resistance starting drive 15, explosion-proof type one-level drag conveyor 16, explosion-proof type bottom valve 17, explosion-proof type two-stage scraper conveyer 18, explosion-proof type unloading valve 19, ash-unloading tube 20, explosion-proof type is without airborne dust dust unloadnig apparatus 21, exhaust gas entrance 22, clean gas outlet 23, catch and inhale valve 24,
Acetylene generator calcium carbide awning waste gas cleaning system comprises the dust removing units be made up of the explosion-proof pulsed jet cloth filter 1 of multiple special type, pulsed jet cloth filter 1 can adopt if Patent document number is pulsed jet cloth filter in CN104707411A, pulsed jet cloth filter 1 in dust removing units is arranged in two row's multiple rows, pulsed jet cloth filter in each row of each row respectively transversely, longitudinally alignment, often in row, each pulsed jet cloth filter inner chamber seals connection mutually by the passage between adjacent wall, often in row, adjacent pulse sack cleaner can in the assembly and disassembly of associated channel place, thus be convenient to pulsed jet cloth filter 1 number selected as required in dust removing units, a left side for described dust removing units, right two ends are respectively equipped with exhaust gas entrance 22 and clean gas outlet 23, exhaust gas entrance 22 and clean gas outlet 23 are left with dust removing units respectively, the bore seal of the pulsed jet cloth filter 1 at right two ends is communicated with, be provided with for before waste gas is imported respectively in exhaust gas entrance 22, the dividing plate 24 of rear two row's pulsed jet cloth filters 1.
Exhaust gas entrance 22 is caught suction hood 3 by exhaust inlet pipe 2 and the waste gas being distributed in calcium carbide Treatment stations and is tightly connected mutually, waste gas catches the inlet end that suction hood 3 is located at exhaust inlet pipe 2, it can be arranged on the top draft hood on the fume trap cover of ad-hoc location or roof disposed in the interior that waste gas catches suction hood 3, for converging the dust kicked up, collecting, the exhaust inlet pipe 2 that contiguous each waste gas catches suction hood 3 is respectively equipped with and catches catching of suction hood 3 inhale valve 24 for opening or close this waste gas.
Clean gas outlet 23 is tightly connected with the air intake of blower fan 9 by purification tracheae 8, and purification tracheae 8 is provided with the purified gas air bleeding valve 5 for opening or cut off pipe inner gateway, and the outlet air end of blower fan 9 is sealed with the chimney 10 of side by blast pipe 11 and is communicated with.Described blower fan 9 is driven by the motor 12 of side, and when blower fan 9 starts, motor 12 hinders starting drive 15 by the liquid of its side and drives, thus reduces pressure drop of grid when motor 12 starts, and ensures the normal work of miscellaneous equipment; After blower fan 9 has started, liquid resistance starting drive 15 quits work, motor 12 is driven by the frequency converter 13 of its opposite side, thus the rotating speed of blower fan 9 can be changed as required in real time, be provided with the switching device shifter 14 of switching and motor 12 connection status between liquid resistance starting drive 15 and frequency converter 13.
The lower end discharge outlet of each pulsed jet cloth filter 1 is provided with a bottom valve 17, dust removing units bottom is provided with one-level drag conveyor 16, after bottom valve 17 is opened, the ash material being deposited on bottom in each pulsed jet cloth filter 1 is expelled to one-level drag conveyor 16 from discharging opening, the right-hand member of one-level drag conveyor 16 is provided with two-stage scraper conveyer 18, the right-hand member bottom of two-stage scraper conveyer 18 and the upper end of ash-unloading tube 20 are tightly connected, the lower end of ash-unloading tube 20 and being tightly connected without airborne dust dust unloadnig apparatus 21 on the downside of it, ash material can be sent in special collecting cart without airborne dust dust unloadnig apparatus 21, ash-unloading tube 20 is also provided with the unloading valve 19 controlling break-make, described one-level drag conveyor 16, two-stage scraper conveyer 18 can adopt as the Chinese patent literature number drag conveyor that is CN103318604A or CN102951408A, described without airborne dust dust unloadnig apparatus 21 can adopt as in the Chinese patent literature number Chinese patent literature that is CN201008872Y without airborne dust dust unloadnig apparatus.
The top of each pulsed jet cloth filter 1 is also sealedly connected with the pulse tracheae 7 for removing adhesive dust on cloth bag, the inlet end of pulse tracheae 7 is sealedly connected with air supply processing equipment 6, this air supply processing equipment 6 can using the nitrogen separation in air out and pressurization after as cloth bag deashing gas, nitrogen has anti-flammability, the security of whole system can be improved, the pulse tracheae 7 of contiguous each pulsed jet cloth filter 1 is respectively equipped with the pulse air valve 4 for control piper break-make.
The inwall of each conveyance conduit and chimney 10 is all provided with the air volume meter for measuring throughput, the valve on above-mentioned each pipeline all carries out Based Intelligent Control unlatching or cut out by PLC, and the startup of blower fan 9 and work, off-line ash-clearing process are all controlled by PLC.Described catch inhale valve 24, purified gas air bleeding valve 5, bottom valve 17, one-level drag conveyor 16, one-level drag conveyor 16, hinder starting drive 15 without airborne dust dust unloadnig apparatus 21, pulse air valve 4, unloading valve 19, motor 12, liquid, frequency converter 13, switching device shifter 14 all control automatically by PLC system, each air volume meter is all connected with this PLC system signal.
The maximum quantity of wind of blower fan 9 is 20 × 10
4m3/h, the rated power 500KW of motor 12, its rated voltage is 10KV.
Setting filtration velocity when each pulsed jet cloth filter 1 works is 0.9-1.2m/min, both can extend the life-span of cloth bag, obviously can not reduce filter efficiency again.
The cloth bag deashing process of this cleaning system is off-line ash-clearing, namely after this cleaning system is shut down, carries out cloth bag deashing, compares dust second adsorption that online ash removal can prevent from producing in deashing on cloth bag, improves ash-removal effect.
When this cleaning system be applied to calcium carbide dress discharging pit etc. produce amount of dust larger region time, can adopt as Figure 2-3, the dust removing units be made up of 14 pulsed jet cloth filters 1, when being applied to the region of a small amount of dusts of generation such as calcium carbide transport process when this cleaning system, can adopt as shown in fig. 6-7, the dust removing units be made up of 8 pulsed jet cloth filters 1, certainly according to different needs, the quantity of the pulsed jet cloth filter 1 in dust removing units can be changed arbitrarily, be not limited to the arrangement of above-mentioned two kinds of quantity, but the number of the pulsed jet cloth filter in dust removing units must be even numbers, thus make the path of waste gas after two row's pulsed jet cloth filters 1 identical, make two-way air-flow velocity identical, flow resistance is equal, prevent air turbulence, when this cleaning system is applied to closed region, the top draft hood be arranged on indoor roof can be adopted, when this cleaning system is applied to open region, the fume trap cover being arranged on ad-hoc location can be adopted.
Described pulse tracheae 7 can adopt as Chinese patent literature number for sack cleaner in CN204352680U is efficiently jetted the injection tube of band winding-up short tube that induction apparatus adopts, and each cloth bag upper port in pulsed jet cloth filter is aimed in the outlet of each winding-up short tube.
The casing middle and upper part of described exhaust inlet pipe 2, purification tracheae 8, ash-unloading tube 20, pulsed jet cloth filter 1 is provided with flame proof film or venting of dust explosion mouth, to play explosion-proof effect, guarantees production safety.
The course of work of acetylene generator calcium carbide awning waste gas cleaning system comprises the following steps:
(1) start blower fan 9 by liquid resistance starting drive 15, then controlled the rotating speed of blower fan 9 by frequency converter 13;
(2) the calcium carbide dust that waste gas catches suction hood 3 place is inhaled into dust removing units with air, is divided into two-way respectively after each pulsed jet cloth filter 1 in front two rows carries out dust removal by filtration, purifies air by purification tracheae 8 after blower fan 9, enters the external world by chimney 10;
(3) when shutting down deashing, the purified gas air bleeding valve 5 that respectively catching on exhaust inlet pipe 2 is inhaled on valve 24 and purification tracheae 8 is closed, each pulse air valve 4 is opened, and the nitrogen with setting pressure produced by air supply processing equipment 6 enters in each pulsed jet cloth filter 1 and carries out deashing to cloth bag;
(4) bottom valve 17 is opened, the dust be deposited in bottom each pulsed jet cloth filter 1 is fallen in one-level drag conveyor 16, dust is sent in ash-unloading tube 20 by I and II drag conveyor, by the special collecting cart directly sent into by dust without airborne dust dust unloadnig apparatus 21 below it.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And these belong to spirit institute's apparent change of extending out of the present invention or change and are still among protection scope of the present invention.
Claims (10)
1. an acetylene generator calcium carbide awning waste gas cleaning system, it is characterized in that comprising: extended transversely by multipair pulsed jet cloth filter (1), the dust removing units assembled, each paired pulses sack cleaner (1) is longitudinally arranged, the bore seal of often arranging adjacent pulse sack cleaner in pulsed jet cloth filter is transversely communicated with, the transverse ends of dust removing units is respectively equipped with exhaust gas entrance (22) and clean gas outlet (23), exhaust gas entrance (22) and clean gas outlet (23) are communicated with the bore seal of the pulsed jet cloth filter (1) at dust removing units transverse ends place respectively, the dividing plate (24) for being imported respectively by waste gas in two row's pulsed jet cloth filters (1) is provided with in exhaust gas entrance (22).
2. waste gas cleaning system according to claim 1, it is characterized in that: described exhaust gas entrance (22) is caught suction hood (3) with at least one for the waste gas converging dust-laden exhaust gas by exhaust inlet pipe (2) and sealed and be communicated with, the exhaust inlet pipe (2) that contiguous each waste gas catches suction hood (3) place is respectively equipped with and inhales valve (24) for catching of control piper break-make.
3. waste gas cleaning system according to claim 2, it is characterized in that: described clean gas outlet (23) is tightly connected by the air intake of purification tracheae (8) with blower fan (9), the outlet air end of blower fan (9) and the chimney (10) of side are tightly connected, and the purification tracheae (8) between clean gas outlet (23) and blower fan (9) is provided with the purified gas air bleeding valve (5) of control piper break-make.
4. waste gas cleaning system according to claim 3, it is characterized in that: the side of described blower fan (9) is provided with the motor (12) driving blower fan (9), the side of motor (12) is provided with for liquid resistance starting drive (15) of starter motor (12) and for regulating the frequency converter (13) of motor (12) rotating speed after starting in real time, is provided with the switching device shifter (14) of switching and motor (12) connection status between liquid resistance starting drive (15) and frequency converter (13).
5. waste gas cleaning system according to claim 3, it is characterized in that: on the downside of described dust removing units, be provided with the one-level drag conveyor (16) that can receive the ash material that all pulsed jet cloth filters (1) lower end discharge outlet is discharged, each pulsed jet cloth filter (1) lower end discharge outlet is provided with the bottom valve (17) controlling ash material discharge, the right side of one-level drag conveyor (16) is provided with two-stage scraper conveyer (18), the right-hand member bottom of two-stage scraper conveyer (18) and the upper end of ash-unloading tube (20) are tightly connected, the lower end of ash-unloading tube (20) and being tightly connected without airborne dust dust unloadnig apparatus (21) on the downside of it, ash-unloading tube (20) is provided with the unloading valve (19) of control piper break-make.
6. waste gas cleaning system according to claim 5, it is characterized in that: the top of each pulsed jet cloth filter (1) is tightly connected with the outlet side of the pulse tracheae (7) for removing adhesive dust on cloth bag, the inlet end of pulse tracheae (7) seals with the air supply processing equipment (6) of the nitrogen that can generate setting pressure and is communicated with, and the pulse tracheae (7) at the top of contiguous each pulsed jet cloth filter (1) is respectively equipped with the pulse air valve (4) of control piper break-make.
7. waste gas cleaning system according to claim 6, is characterized in that: the inwall of described exhaust inlet pipe (2), purification tracheae (8), blast pipe (11), pulse tracheae (7) and chimney (10) is all provided with the air volume meter for measuring throughput.
8. waste gas cleaning system according to claim 7, it is characterized in that: described in catch and inhale valve (24), purified gas air bleeding valve (5), bottom valve (17), one-level drag conveyor (16), one-level drag conveyor (16), all automatically to be controlled by PLC system without airborne dust dust unloadnig apparatus (21), pulse air valve (4), unloading valve (19), described air volume meter is all connected with this PLC system signal.
9. waste gas cleaning system according to claim 4, is characterized in that: described motor (12), liquid resistance starting drive (15), frequency converter (13), switching device shifter (14) are all controlled automatically by PLC system;
The casing middle and upper part of described exhaust inlet pipe (2), purification tracheae (8), ash-unloading tube (20), pulsed jet cloth filter (1) is provided with flame proof film or venting of dust explosion mouth.
10. a method of work for acetylene generator calcium carbide awning waste gas cleaning system, is characterized in that comprising the following steps:
(1) hinder starting drive (15) by liquid and start blower fan (9), then controlled the rotating speed of blower fan (9) by frequency converter (13);
(2) the calcium carbide dust that waste gas catches suction hood (3) place is inhaled into dust removing units with air, be divided into two-way respectively after each pulsed jet cloth filter (1) in front two rows carries out dust removal by filtration, purify air by purification tracheae 8 after blower fan (9), enter the external world by chimney (10);
(3) when shutting down deashing, the purified gas air bleeding valve (5) that respectively catching on exhaust inlet pipe (2) is inhaled in valve (24) and purification tracheae (8) is closed, each pulse air valve (4) is opened, and the nitrogen with setting pressure produced by air supply processing equipment (6) enters in each pulsed jet cloth filter (1) and carries out deashing to cloth bag;
(4) bottom valve (17) is opened, the dust being deposited in each pulsed jet cloth filter (1) bottom is fallen in one-level drag conveyor (16), dust is sent in ash-unloading tube (20) by I and II drag conveyor, by the special collecting cart directly sent into by dust without airborne dust dust unloadnig apparatus (21) below it.
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