CN203324860U - Double cooling protection and control system of intermediate frequency furnace smelting smoke dust cloth bag-type dust remover - Google Patents
Double cooling protection and control system of intermediate frequency furnace smelting smoke dust cloth bag-type dust remover Download PDFInfo
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- CN203324860U CN203324860U CN2013203387676U CN201320338767U CN203324860U CN 203324860 U CN203324860 U CN 203324860U CN 2013203387676 U CN2013203387676 U CN 2013203387676U CN 201320338767 U CN201320338767 U CN 201320338767U CN 203324860 U CN203324860 U CN 203324860U
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Abstract
The utility model relates to a double cooling protection and control system of an intermediate frequency furnace smelting smoke dust cloth bag-type dust remover. The double cooling protection and control system of the intermediate frequency furnace smelting smoke dust cloth bag-type dust remover comprises an intermediate frequency smelting electric furnace, a smoke dust collection furnace lid, a main air pipe, a cyclone dust remover, a middle air pipe, a cloth bag-type dust remover, an induced draft fan and an air discharge cylinder, wherein two stage temperature-measuring protection systems controlled by a control compute are arranged on the main air pipe and the middle air pipe. A first stage temperature-measuring protection system comprises a front temperature-measuring head and a front wild wind valve, the front temperature-measuring head detects a smoke temperature signal inside the main air pipe and transmits the smoke temperature signal to the control computer, the control computer processes the smoke temperature signal and sends a work instruction to the front wild wind valve, and then the first stage temperature-measuring protection system is formed. A second-stage temperature-measuring protection system comprises a temperature-measuring head in front of a bag and a wild wind valve in front of a bag, the temperature-measuring head in front of a bag detects a smoke dust temperature signal inside the middle air pipe and transmits the smoke dust temperature signal to the control computer, the control computer processes the smoke dust temperature signal and sends a work instruction to the wild wind valve in front of a bag, and then the second-stage temperature-measuring protection system is formed. According to the double cooling protection and control system of the intermediate frequency furnace smelting smoke dust cloth bag-type dust remover, a double protection mode is adopted, the fault rate is lowered, and the reliability of continuous operation of system equipment is improved.
Description
Technical field
The utility model relates to the cooling of intermediate frequency furnace melting high-temperature smoke and sack cleaner filter bag protection system, refers in particular to a kind of energy Automatic Detection and Control, effective two cooling protection control system of the intermediate frequency furnace melting flue dust sack cleaner that enters filter bag flue dust temperature that reduce.
Background technology
Mid-frequency melting furnace has become the main smelting equipment of cast iron, cast steel at present, because belonging to high melt, and furnace charge mostly is the pig iron, steel scrap, the flue dust of generation contains toxic and harmful and a large amount of dust, needs to collect this high-temperature smoke and standard discharge after fly-ash separator filters.The filter bag used in sack cleaner at present is terylene needled felt, its working temperature is generally 120 ℃, 150 ℃ of moments, if entering the flue dust temperature of sack cleaner has surpassed, and can not be lowered the temperature in time, entering dirt pocket there will be the filter bag burning bag and sticks with paste bag, cause filter area to reduce, resistance increment, also can cause the filter bag accelerated deterioration, obviously shorten serviceable life, operation expense increases greatly, this temperature is detected by temperature measuring head before being arranged on the ducted bag of sack cleaner air inlet, if temperature surpasses 120 ℃ that set, pass into the wild wind forced cooling of normal temperature, control the wind-warm syndrome enter in fly-ash separator below working temperature thereby reach, guarantee filter bag safety, if the flue dust temperature can not get effective restriction, more paste bag or aging conditions appear, will cause the sack cleaner filter effect to worsen, resistance increment, fan energy consumption increases, and life of bag filter shortens greatly, and the maintain and replace number of times is frequent, and operation cost is high.This temperature control mode is the mode that each producer is generally used at present.
But, there is following aspect problem in this mode: because the thermotonus of temperature thermocouple head generally lags behind, before bag, temperature measuring head is very near again apart from sack cleaner, the existing delay when controlling flue dust temperature that computing machine measures and surpass design temperature, the wild air-valve action of in addition introducing the normal temperature air cooling also has delay, part overtemperature flue dust reality has entered in the filter chamber of sack cleaner, may to filter bag, cause and threaten even burning bag, paste bag; And because sack cleaner is bulky, generally be arranged on outdoor, before bag, wild air-valve installation site also is positioned at outdoor, only as rain-proof shelter, block, the wild wind water cut of introducing when outdoor rainwater, when there was dampness in the air is larger, more easily cause dewfall in filter bag surface dust bonding, casing, cause similar paste bag, effective filtration area reduces, filter effect variation, resistance increment, energy consumption increases, on general fact, stick with paste bag, this situation ubiquity of knot bag, poor filtration effect, greatly shorten serviceable life, becomes the problem that the user has a headache the most.There is no at present the two protection of effective intermediate frequency furnace melting flue dust sack cleaner cooling control technology.
Summary of the invention
The purpose of this utility model is for the shortcoming existed in background technology and problem improvement and bring new ideas in addition, provides a kind of intermediate frequency furnace melting flue dust sack cleaner two cooling protection control system.
The technical solution of the utility model is that structure is arranged on the indoor intermediate frequency (IF) smelting electric furnace connected successively a kind of comprising, flue dust collecting bell and air main, and be arranged on the outdoor tornado dust collector that connect successively, middle airduct, sack cleaner, the two cooling protection control system of the intermediate frequency furnace melting flue dust sack cleaner of induced draft fan and aiutage, the melting high-temperature smoke that wherein the intermediate frequency (IF) smelting electric furnace produces is collected by the flue dust collecting bell, deliver to the tornado dust collector one-time dedusting through air main, deliver to the sack cleaner final dusting through middle airduct again, finally by induced draft fan and aiutage, discharge, on its air main and middle airduct, be provided with by controlling computer-controlled two-stage thermometric protection system, wherein:
One-level thermometric protection system comprises the preposition temperature measuring head that is arranged on the air main leading portion, with be arranged on the air main back segment, control the preposition wild air-valve that the wild wind of normal temperature laboratory enters, and preposition temperature measuring head all is connected the control computing machine with preposition wild air-valve, described preposition temperature measuring head detects the interior flue dust temperature signal of air main and is sent to the control computing machine, then sends work order to preposition wild air-valve formation one-level thermometric cooling protection through controlling after computing machine is processed;
Secondary thermometric protection system comprises the front temperature measuring head of the bag that is arranged on middle airduct leading portion; with be arranged in the middle of the front wild air-valve of bag that enters of airduct back segment, the pulpit wild wind of outer normal temperature; and before bag, temperature measuring head also is connected the control computing machine with wild air-valve before bag; in the middle of described bag of front temperature measuring head detects, the interior flue dust temperature signal of airduct is sent to the control computing machine, then sends work order to a bag front wild air-valve formation secondary thermometric alarm and protection after the processing of control computing machine.
Advantage of the present utility model and beneficial effect:
Sack cleaner is the core link that the mid-frequency melting furnace flue dust collecting filters standard discharge; and wherein filter bag is sack cleaner " lung "; be the core in core, filter bag Yin Gaowen is impaired is the main reason that fly-ash separator lost efficacy, and effectively protects filter bag to avoid the high-temperature smoke infringement extremely important.The utility model has increased a preposition thermometric, wild wind cooling link on air main, in conjunction with the cooling link of middle airduct, forms two-stage observing and controlling link and can fast and reliable effectively protect filter bag safety.At the system leading portion, be that the main air pipeline section just carries out preposition thermometric, the cooling of wild wind; antedating response; cooling in time; add a bag front secondary thermometric, the cooling of wild wind; dicyclo saves reliable cooling protection and adopts indoorly than dry air cooling, has solved an original monocycle joint bag pre-structure thermometric, the cooling of wild wind lags behind and causes safeguard measure weak effect, the cooling of outdoor humid air easily to stick with paste the root problem of bag.Because filter bag quantity is many, price is higher, it is the prime cost of fly-ash separator, mainly run especially the repair and maintenance cost, after adopting duplicate protection, the filter bag failure rate adopts the protection of monocycle joint to reduce more than at least 80%, and the sack cleaner failure rate reduces more than 10%, energy-conservation more than 10%, the continuous operational reliability of system equipment improves greatly, because the filter bag malfunction and failure causes flue dust to exceed standard effluxing situation greatly reducing, has good social and economic benefits; The utility model technology also has dissemination to metallurgy, casting, building materials, mine, chemical industry, the reliable cooling protection filter bag of power industry fly-ash separator high-temperature smoke simultaneously, and so economy and social benefit are more obvious.
The accompanying drawing explanation
Fig. 1 is the utility model structural principle schematic diagram.
Fig. 2 is the utility model technological principle schematic diagram.
Embodiment
By Fig. 1, 2 is known, the utility model comprises and is arranged on the indoor intermediate frequency (IF) smelting electric furnace 1 connected successively, flue dust collecting bell 3 and air main 4, and be arranged on the outdoor tornado dust collector 5 that connect successively, middle airduct 6, sack cleaner 7, induced draft fan 8 and aiutage 9, the melting high-temperature smoke 2 that wherein intermediate frequency (IF) smelting electric furnace 1 produces is collected by flue dust collecting bell 3, deliver to tornado dust collector 5 one-time dedustings through air main 4, deliver to sack cleaner 7 final dustings through middle airduct 6 again, finally by induced draft fan 8 and aiutage 9, discharge, be provided with the two-stage thermometric protection system of controlling by controlling computing machine 13 on its air main 4 and middle airduct 6, wherein:
One-level thermometric protection system comprises the preposition temperature measuring head 14 that is arranged on air main 4 leading portions, with be arranged on air main 4 back segments, control the preposition wild air-valve 15 that the wild wind 16 of normal temperature laboratory enters, and preposition temperature measuring head 14 all is connected and controls computing machine 13 with preposition wild air-valve 15, described preposition temperature measuring head 14 detects the interior flue dust temperature signal of air main 4 and is sent to controls computing machine 13, then transmission work order to preposition wild air-valve 15 forms one-level thermometric cooling protection after controlling computing machine 13 processing;
Secondary thermometric protection system comprises the front temperature measuring head 10 of the bag that is arranged on middle airduct 6 leading portions; with be arranged in the middle of the front wild air-valve 11 of bag that enters of airduct 6 back segments, the pulpit wild wind 12 of outer normal temperature; and before bag, temperature measuring head 10 also is connected and controls computing machine 13 with wild air-valve 11 before bag; in the middle of described bag of front temperature measuring head 10 detects, the interior flue dust temperature signal of airduct 6 is sent to and controls computing machine 13, then sends work order to a front wild air-valve 11 formation secondary thermometric alarm and protections of bag after 13 processing of control computing machine.
Before preposition temperature measuring head 14 described in the utility model and bag, temperature measuring head 10 is the thermocouple temperature measurement head.It is indoor that described air main 4 and preposition temperature measuring head 14 and preposition wild air-valve 15 all are arranged on factory building, and complete the main cooling processing of melting high-temperature smoke 2 by introducing the wild wind of indoor seasoning normal temperature.
Design concept of the present utility model:
Thereby postpone not reach for detected temperatures reflection before the sack cleaner air inlet situation that fast cooling may cause burning bag, proposed, at air main 4 leading portions, the preposition temperature measuring head 14 of a set of thermopair is installed, and at the indoor back segment of air main 4 factory building, preposition wild air-valve 15 is installed, when detecting temperature by preposition temperature measuring head 14, computing machine surpasses setting value (as 125 ℃, this value need be set through on-the-spot test according to the minimum cooling extent of pipeline or tornado dust collector 5), open and be positioned at indoor preposition wild air-valve 15 at once, introduce rapidly normal temperature indoor seasoning air, reduce flue dust temperature in airduct, thereby reach the flue dust temperature that guarantees to enter sack cleaner 7 and be no more than 120 ℃ and the purpose that keeps dry.And the front temperature measuring head 10 of the bag of airduct 6 in the middle of original being positioned at, before bag, 11 of wild air-valves are as emergency power, when before bag, a temperature measuring head 10 still measures more than 120 ℃ wind-warm syndrome, provide alerting signal, and before opening bag nearby, wild air-valve 11 is introduced the wild wind 12 of outdoor normal temperature, reach the purpose of answering quench, but because of preposition temperature measuring head 14, the first class of protection cooling in advance of preposition wild air-valve 15, the number of times that before bag, wild air-valve 11 is opened can greatly reduce, reached the purpose of filter bag in protecting cloth bag dust collector 7, thereby guaranteed filter effect, guaranteed filter bag safety, reached energy-conservation, reduce the purpose of operating cost, while also has profound significance to the popularization of mid-frequency melting furnace energy-saving and smoke-removing dust pelletizing system, this technology can also be applied to other metallurgy, casting, the temperature control protection of the bag-type dust removal system of the industry smelting furnaces such as renewable resource utilization.
Structural principle of the present utility model:
The utility model is comprised of intermediate frequency (IF) smelting electric furnace 1, flue dust collecting bell 3, air main 4, tornado dust collector 5, middle airduct 6, sack cleaner 7, induced draft fan 8, aiutage 9, the front wild air-valve 11 of bag, preposition wild air-valve 15, the front temperature measuring head 10 of bag, preposition temperature measuring head 14, it has increased a set of preposition temperature measuring head 14, preposition wild air-valve 15 on the indoor air main 4 of factory building, as the one-level wind-warm syndrome, monitor, thereby can effectively control the flue dust temperature that enters sack cleaner and be no more than filter bag working temperature (be generally 120 ℃, can according to filter bag material and heatproof property settings); Formed flue dust dicyclo joint thermometric cooling protection technology together with former marsupial before measurement temperature link of protection; reliably protecting filter bag and fly-ash separator; and the main indoor comparatively dry air cooling-down of introducing; can not cause sticking with paste bag because introducing humid air; because filter bag is effectively protected; resistance reduces, and energy-saving effect is obvious.
The utility model is in the casting smelting plant building, and intermediate frequency (IF) smelting electric furnace 1 produces melting high-temperature smoke 2, by bidirectional turning flue dust collecting bell 3, is collected, and is inhaled into and is arranged in trench or built on stilts air main 4; Enter again spark and flutter collection tornado dust collector 5 primary dust removings, then enter sack cleaner 7 two-stage dust removals by middle airduct 6, then pass through induced draft fan 8, aiutage 9 discharged in atmosphere.
The utility model one-level thermometric protection system: the preposition temperature measuring head 14 that is installed on air main 4 leading portions can detect in time the flue dust temperature and send dust pelletizing system to controls computing machine 13, before being installed on the preposition wild air-valve 15 of air main 4 indoor back segments and being installed on outdoor interlude airduct bag, wild air-valve can be regulated by controlling computing machine 13, when the flue dust temperature when setting limit value, regulate preposition wild air-valve 15 and open the indoor comparatively dry air of introducing at once, reduce rapidly the flue dust temperature in air main, enter again back two-stage dedusting link, guarantee that the flue dust temperature detection is timely, the wild wind of lowering the temperature is introduced cooling in time in time, guarantee the filter bag safety in second level sack cleaner 7, and because the cooling air of introducing is indoor comparatively dry, avoid sticking with paste bag.
The utility model secondary thermometric protection system: whether the front temperature measuring head 10 of bag that is installed on outdoor middle airduct 6 leading portions enters the flue dust temperature of sack cleaner 7 over setting alarming value as second energy-conservation measurement of detection ring; if surpass illustrate to need report to the police and send dust pelletizing system to and control computing machine 13; the front wild air-valve 11 of bag that is installed on outdoor middle airduct 6 back segments can be regulated by controlling computing machine 13; directly cooling, guarantee filter bag safety.
As shown in Figure 1, the utility model has increased a preposition observing and controlling link on the anterior air main 4 of system, with observing and controlling link before bag, has formed the observing and controlling of dicyclo joint, thereby has guaranteed the validity of observing and controlling.When the melting flue dust enters air main 4, preposition temperature measuring head 14 measures the flue dust temperature and surpasses while setting the monitoring value, control rapid adjusting of computing machine 13 and open normal temperature air reduction flue dust temperature comparatively dry in preposition wild air-valve 15 introducing factory buildings, through tornado dust collector 5 dedustings, naturally lower the temperature again, if temperature exceeding standard still, second thermometric 6 sections of middle airducts regulates and controls the cooling protection link, through two-stage observing and controlling, lower the temperature, flue dust enters sack cleaner 7, substantially filter bag is not had to the damage burnout phenomenon, and be indoorly than dry air, to lower the temperature because of what introduce, therefore sticking with paste the bag situation also substantially no longer occurs, flue dust thermometric adjusting function mainly realized by preposition the first link, and back the second link only as second alarming protection defence line action frequency seldom.Intermediate frequency furnace melting dust smoke and extraction system filter bag failure rate after employing the utility model technical protection filter bag scheme reduces more than 90%; the 20%(that O&M cost only accounts for total cost does not contain the total cost of normal electricity consumption); efflux lasting compliance rate and reach more than 98%, energy-conservation more than 10%.
Technological principle of the present utility model:
As shown in Figure 2, the utility model two-stage thermometric cooling protection control flow is: steps A 1: the high-temperature smoke that the mid-frequency melting furnace melting produces is collected and is mixed because leaking out suitable wild wind through the dedusting bell and enters air main in factory building (through trench or built on stilts); Steps A 2: be installed on the preposition temperature measuring head thermometric of air main leading portion and pass to dust pelletizing system and control computing machine; Steps A 3: control computing machine the flue dust temperature measured is compared with the setting limits value, judge whether to surpass setting value, if do not surpass, output action signal not, flue dust continues to move ahead, and directly arrives steps A 7, if temperature surpasses setting value, cooling link below entering; Steps A 4-A6: control computer control and open rapidly preposition wild air-valve, in factory building, normal temperature air is inhaled into, and reduces rapidly overtemperature flue dust temperature in air main; A7: flue dust enters spark trapping and tornado dust collector, removes the larger particles dust, and has suitable naturally cooling; A8: flue dust enters the middle airduct connected between tornado dust collector and sack cleaner; A9: be installed on the front temperature measuring head thermometric of bag of middle airduct leading portion and pass to dust pelletizing system and control computing machine; Steps A 10: control computing machine the flue dust temperature measured is compared with the setting limits value, judge whether to surpass setting value, if do not surpass, output action signal not, flue dust continues to move ahead, and directly arrives steps A 14, if temperature surpasses setting value, cooling link below entering; Steps A 11-A13: control computer control and open rapidly a bag front wild air-valve, outdoor normal temperature air is inhaled into, and reduces and enters sack cleaner overtemperature flue dust temperature rapidly; Steps A 14-A17: it is up to standard through the filter bag filtration that the flue dust in temperature limit enters sack cleaner, through centrifugal induced draught fan, aiutage, effluxes.Flue dust temperature limiting setting value is according to filter bag filtrate material, heatproof property settings.
Embodiment described in the utility model is only the description that preferred implementation of the present utility model is carried out; not the utility model design and scope are limited; under the prerequisite that does not break away from the utility model design philosophy; various modification and improvement that in this area, engineering technical personnel make the technical solution of the utility model; all should fall into protection domain of the present utility model; the technology contents that the utility model is asked for protection, all be documented in claims.
Claims (3)
1. two cooling protection control system of an intermediate frequency furnace melting flue dust sack cleaner, comprise and be arranged on the indoor intermediate frequency (IF) smelting electric furnace (1) connected successively, flue dust collecting bell (3) and air main (4), and be arranged on the outdoor tornado dust collector (5) that connect successively, middle airduct (6), sack cleaner (7), induced draft fan (8) and aiutage (9), the melting high-temperature smoke (2) that wherein intermediate frequency (IF) smelting electric furnace (1) produces is collected by flue dust collecting bell (3), deliver to tornado dust collector (5) one-time dedusting through air main (4), deliver to sack cleaner (7) final dusting through middle airduct (6) again, finally by induced draft fan (8) and aiutage (9), discharge, it is characterized in that:
Be provided with the two-stage thermometric protection system of controlling by controlling computing machine (13) on air main (4) and middle airduct (6), wherein:
One-level thermometric protection system comprises the preposition temperature measuring head (14) that is arranged on air main (4) leading portion, with be arranged on air main (4) back segment, control the preposition wild air-valve (15) that the wild wind of normal temperature laboratory (16) enters, and preposition temperature measuring head (14) all is connected and controls computing machine (13) with preposition wild air-valve (15), described preposition temperature measuring head (14) detects the interior flue dust temperature signal of air main (4) and is sent to controls computing machine (13), then transmission work order to preposition wild air-valve (15) forms one-level thermometric cooling protection after controlling computing machine (13) processing;
Secondary thermometric protection system comprises the front temperature measuring head (10) of the bag that is arranged on middle airduct (6) leading portion; with be arranged in the middle of the front wild air-valve (11) of bag that enters of airduct (6) back segment, the outer wild wind of normal temperature in pulpit (12); and before bag, temperature measuring head (10) also is connected and controls computing machine (13) with wild air-valve (11) before bag; in the middle of described bag of front temperature measuring head (10) detects, the interior flue dust temperature signal of airduct (6) is sent to and controls computing machine (13), then sends work order to a front wild air-valve (11) formation of bag secondary thermometric alarm and protection after control computing machine (13) processing.
2. the two cooling protection control system of intermediate frequency furnace melting flue dust sack cleaner according to claim 1, is characterized in that the front temperature measuring head (10) of described preposition temperature measuring head (14) and bag is the thermocouple temperature measurement head.
3. two cooling protection control system of intermediate frequency furnace melting flue dust sack cleaner according to claim 1; it is characterized in that described air main (4) and preposition temperature measuring head (14) and preposition wild air-valve (15) all are arranged on factory building indoor, and complete the main cooling processing of melting high-temperature smoke (2) by introducing the wild wind of indoor seasoning normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203387676U CN203324860U (en) | 2013-06-14 | 2013-06-14 | Double cooling protection and control system of intermediate frequency furnace smelting smoke dust cloth bag-type dust remover |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203387676U CN203324860U (en) | 2013-06-14 | 2013-06-14 | Double cooling protection and control system of intermediate frequency furnace smelting smoke dust cloth bag-type dust remover |
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| Publication Number | Publication Date |
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| CN203324860U true CN203324860U (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013203387676U Withdrawn - After Issue CN203324860U (en) | 2013-06-14 | 2013-06-14 | Double cooling protection and control system of intermediate frequency furnace smelting smoke dust cloth bag-type dust remover |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279152A (en) * | 2013-06-14 | 2013-09-04 | 岳阳华中电磁科技有限公司 | Double cooling protection and control system of intermediate frequency furnace smelting smoke bag-type dust remover |
-
2013
- 2013-06-14 CN CN2013203387676U patent/CN203324860U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279152A (en) * | 2013-06-14 | 2013-09-04 | 岳阳华中电磁科技有限公司 | Double cooling protection and control system of intermediate frequency furnace smelting smoke bag-type dust remover |
| CN103279152B (en) * | 2013-06-14 | 2015-02-11 | 湖南华中天地环保科技有限公司 | Double cooling protection and control system of intermediate frequency furnace smelting smoke bag-type dust remover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUNAN HUAZHONG TIANDI ENVIRONMENTAL PROTECTION TEC Free format text: FORMER NAME: YUEYANG HUAZHONG ELECTROMAGENT TECHNOLOGICAL CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 414109 No. 58 Macheng Road, Macheng Town, Yueyang County, Hunan, Yueyang Patentee after: YUEYANG HUAZHONG ELECTROMAGNET TECHNOLOGY CO., LTD. Address before: 414000 Macheng Road, Macheng Town, Yueyang, Hunan Patentee before: Yueyang Huazhong Electromagnet Technological Co., Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20131204 Effective date of abandoning: 20150211 |
|
| RGAV | Abandon patent right to avoid regrant |