CN202666580U - Inclosed electric furnace dry method dust removing device provided with bypass bag-type dust removers - Google Patents
Inclosed electric furnace dry method dust removing device provided with bypass bag-type dust removers Download PDFInfo
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- CN202666580U CN202666580U CN201220147073XU CN201220147073U CN202666580U CN 202666580 U CN202666580 U CN 202666580U CN 201220147073X U CN201220147073X U CN 201220147073XU CN 201220147073 U CN201220147073 U CN 201220147073U CN 202666580 U CN202666580 U CN 202666580U
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- blower fan
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Abstract
An inclosed electric furnace dry method dust removing device provided with bypass bag-type dust removers comprises an existing dust removing device, at least one group of bypass bag-type dust removers and a programmable logic controller (PLC) system. A cyclone settling chamber, a two-stage cooler, a raw gas blower, a plurality of first bag-type dust removers and a first fresh air blower of the existing dust removing device are communicated in sequence. The lower ends of the cyclone settling chamber, the cooler and the bag-type dust removers are communicated with a dust-storing bin through an inclosed conveying scrapper. The bypass bag-type dust removers comprises a plurality of second bag-type dust removers and a second fresh air blower which are communicated in sequence, and the lower ends of the second bag-type dust removers are communicated with the inclosed conveying scrapper. Changeover valves are arranged between an entry end of the existing dust removing device and the raw gas blower and between an entry end of the bypass bag-type dust removers and the raw gas blower, and the two changeover valves are both controlled by the PLC system to achieve changeover. The inclosed electric furnace dry method dust removing device provided with the bypass bag-type dust removers has the advantages that when the existing dust removing device is repaired and a bag of the existing dust removing device is replaced, blowing-out operation is of no need, and accordingly capacity is improved.
Description
Technical field
The utility model relates to a kind of flue gas cleaning device, specifically a kind of dry-method dust-removal device of closed calcium carbide furnace.
Background technology
China's calcium carbide industry approximately has 450 enterprises, more than 600 furnace of calcium carbide arranged, annual production occupies first place in the world, there is inadequate natural endowment in domestic calcium carbide industry in scale, the type of furnace, layout, energy-saving and environmental protection, material quality is poor, managerial skills are lower, energy consumption is high simultaneously, pollution is heavy, and what give prominence to aspect the calcium carbide production technology be exactly: the off-gas recovery utilization ratio is not good on the one hand, and the purification techniques of flue gas coming from carbide furnace is very backward on the other hand.Domestic calcium carbide industry approximately 80-90% be to be the internal combustion type electric furnace; the wasting of resources is larger; progress and national attention to the energy along with science and technology; it is imperative that the internal combustion type stove changes the totally-enclosed furnace of calcium carbide into; the Eleventh Five-Year Plan period; the research and development that China's calcium carbide industry will strengthen environmental protection technology; strengthen the control of comprehensive energy; strengthen the research and development of energy utilization technology, the degree of minimizing environmental pollution; active adoption totally-enclosed furnace of calcium carbide is so adopt in a large number the internal combustion type furnace of calcium carbide to transform the domestic comparative maturity of technology of totally-enclosed furnace of calcium carbide as.The major technique of totally-enclosed furnace of calcium carbide and equipment are from external introduction, and generally larger, production efficiency is higher, but its gas cleaning and heat energy utilization are not yet obtained ripe and unified technology so far.Even the flue gas dry cleaning technology through investigation totally-enclosed stove also is a difficult problem in developed country.Its difficulty be its fume high-temperature, dust carefully sticking light, carbon monoxide content is high, tar content is high and easily separate out, the variation of cigarette temperature waits greatly factor, and have certain danger.
As shown in Figure 1, it is a kind of closed electric furnace dry-method dust-removal device with bypass sack cleaner that my company uses at present, this closed electric furnace dry-method dust-removal device with bypass sack cleaner comprises cyclone settling chamber 1 ', one-level cooler 2 ', secondary coolers 3 ', thick gas blower fan 4 ', plural tablecloth bag dust collector 5 ', pneumostatic blower fan 6 ', closed conveying scrapper conveyor 7 ', and ash-storing bin 8 '.
Described cyclone settling chamber 1 ', one-level cooler 2 ', secondary coolers 3 ' and plural tablecloth bag dust collector 5 ' are communicated with successively.Be respectively equipped with one-level cooling blower 22 ' and secondary cooling blower 32 ' on described one-level cooler 2 ', the secondary coolers 3 '.Thick gas blower fan 4 ' is arranged between secondary coolers 3 ' and the plural tablecloth bag dust collector 5 ' plural tablecloth bag dust collector 5 ' parallel connection.Pure qi (oxygen) blower fan 6 ' is arranged on the exhaust pass of plural tablecloth bag dust collector 5 '.Closed conveying scrapper conveyor 7 ' is arranged on the lower end of cyclone settling chamber 11 ', one-level cooler 2 ', secondary coolers 3 ' and plural tablecloth bag dust collector 5 ' and is communicated with the lower end of cyclone settling chamber 1 ', one-level cooler 2 ', secondary coolers 3 ' and plural tablecloth bag dust collector 5 '.
This job analysis of closed electric furnace dry-method dust-removal device with bypass sack cleaner is as follows:
Closed electric furnace furnace gas normal condition temperature is 400～700 ℃, and its instantaneous temperature can reach 1000 ℃ during the improper working of a furnace.Because furnace gas temperature is too high, the distance that tens meters (approximately 40 meters) are arranged before with this furnace gas transportation and cooling system, must adopt the water cold sleeve (not shown) to carry out the gas transmission and reach simultaneously a certain amount of cooling purpose, under normal operation, the furnace gas temperature of this moment can be down to 300～500 ℃, then gas enters the cyclone settling chamber 1 ' of dust pelletizing system, owing to containing tar in the closed electric furnace furnace gas, spending when low tar in the high-temperature gas when cryogenic object or gas temperature can separate out, be adsorbed on the cloth bag of tube wall and sack cleaner 5 ', lose the effect of cooling, thereby make cloth bag burn cloth bag owing to temperature raises, because tar is separated out the filter bag surface that is adsorbed on sack cleaner 5 ', make it lose filtering function simultaneously.Therefore the cooler in the dust pelletizing system can not sub-cooled, causes its temperature excessively low.Therefore adopt the but cooler of temperature technology of controlled refrigeration, be controlled at (220～260 ℃) in the safe range to guarantee furnace gas temperature, realize neither can having tar to separate out because furnace gas temperature is low, also can not burn because furnace gas temperature is high the purpose of cloth bag.In addition for the dust removing effects of protecting cloth bag dust collector 5 ', used two-stage cooler: one-level cooler 2 ', secondary coolers 3 ', its Main Function: one, reduce the undesired high low temperature furnace gas temperature difference of moment, is provided to the cooling blower acceleration and deceleration time of adequate reaction; Two, increase film-cooled heat.When gas when entering sack cleaner 5 ', be higher than dew-point temperature in order to guarantee the temperature in the sack cleaner 5 ', will be incubated sack cleaner 5 ' integral body, guarantee sack cleaner 5 ' normal operation.Last gas is extracted out by pure qi (oxygen) blower fan 6 ' and is sent to limekiln or other use.The dust that cyclone settling chamber 1 ', one-level cooler 2 ', secondary coolers 3 ' and plural tablecloth bag dust collector 5 ' are collected is delivered to ash-storing bin 8 ' through closed conveying scrapper conveyor 7 ', transports outward by automobile airtight at last.
Under the abnormal condition; when the electric furnace special circumstances such as material of collapsing occur; the moment flue gas that produces, because time moment is too short, two coolers also have little time flue gas is cooled off; therefore the temperature of advancing sack cleaner 5 ' is very high; generally about the 400-500 degree, and the maximum temperature that cloth bag bears will all be burnt the cloth bag of sack cleaner 5 ' the inside below 280 degree in this case; cause dust arrester to use, must shut down maintenance and change cloth bag.Also there is not good solution in the present industry of this problem.
The utility model content
The technical problems to be solved in the utility model provides a kind of closed electric furnace dry-method dust-removal device with bypass sack cleaner, solves electric furnace moment material that collapses, the problem that causes dust arrester to use at a large amount of high-temperature gas of utmost point short time generation.
The utility model solves the problems of the technologies described above by the following technical solutions: a kind of closed electric furnace dry-method dust-removal device with bypass sack cleaner, comprise existing dust arrester, existing dust arrester comprises cyclone settling chamber (11), one-level cooler (12), secondary coolers (13), thick gas blower fan (14), plural number platform the first sack cleaner (15), the first pure qi (oxygen) blower fan (16), closed conveying scrapper conveyor (17), ash-storing bin (18), the entrance termination furnace gas of described cyclone settling chamber (11) is carried flue (100), described cyclone settling chamber (11), one-level cooler (12), secondary coolers (13) and plural platform the first sack cleaner (15) are communicated with successively, thick gas blower fan (14) is arranged between secondary coolers (13) and plural platform the first sack cleaner (15), the parallel connection of plural number platform the first sack cleaner (15), the first pure qi (oxygen) blower fan (16) is arranged on the exhaust pass of plural platform the first sack cleaner (15), cyclone settling chamber (11), one-level cooler (12), the lower end of secondary coolers (13) and plural platform the first sack cleaner (15) is communicated with ash-storing bin (18) by closed conveying scrapper conveyor (17), and its improvements are:
Described thick gas blower fan (14) port of export is provided with two branch roads: the first branch road and the second branch road, described plural platform the first sack cleaner (15) is arranged on the first branch road, be provided with one first transfer valve (101) at the arrival end of described plural platform the first sack cleaner (15) and the first branch road between thick gas blower fan (14) outlet, described closed electric furnace dry-method dust-removal device with bypass sack cleaner also comprises at least one group of bypass sack cleaner that is arranged on described the second branch road, described every group of bypass sack cleaner comprises the second sack cleaner (25) and the one second pure qi (oxygen) blower fan (26) of plural platform parallel connection, the second pure qi (oxygen) blower fan (26) is arranged on the exhaust pass of plural platform the second sack cleaner (25), the entrance of described the second sack cleaner (25) and thick gas blower fan (14) outlet communicate, be provided with one second transfer valve (102) at the arrival end of described the second sack cleaner (25) and the second branch road between thick gas blower fan (14) outlet, the lower end of plural platform the second sack cleaner (25) is communicated with ash-storing bin (8) by described closed conveying scrapper conveyor (17).
As further improvement of the utility model, be respectively equipped with one-level cooling blower (122) and secondary cooling blower (132) on described one-level cooler (12), the secondary coolers (13).
As further improvement of the utility model, one-level cooling blower (122) and secondary cooling blower (132) in the existing dust arrester are the frequency control blower fan.
As further improvement of the utility model, what one-level cooler (12), the secondary coolers (13) in the existing dust arrester selected all is heat pipe air coolers.
As further improvement of the utility model, described the first transfer valve (101) and the second transfer valve (102) all are connected to a PLC control system, are switched by the control of PLC control system.
The advantage that the utlity model has the closed electric furnace dry-method dust-removal device of bypass sack cleaner is: sack cleaner is designed to the using and the reserved, when sack cleaner need to overhaul, just can switch to the bypass sack cleaner by transfer valve uses, so just do not need blowing out, the cloth bag of changing in the sack cleaner is like this equally.Be that sack cleaner does not all need the blowing out operation when maintenance and replacing cloth bag, thereby improved production capacity, avoid causing the loss of economic interests.
Description of drawings
Fig. 1 is existing a kind of structural representation with closed electric furnace dry-method dust-removal device of bypass sack cleaner.
Fig. 2 is the structural representation that the utlity model has the closed electric furnace dry-method dust-removal device of bypass sack cleaner.
The specific embodiment
See also Fig. 2, the closed electric furnace dry-method dust-removal device that the utlity model has the bypass sack cleaner comprises existing dust arrester, at least one group of bypass sack cleaner and PLC control system (not shown).Only show one group of bypass sack cleaner among Fig. 2, but persons skilled in the art should know, the above bypass sack cleaners of two groups or two groups are set all can reach effect of the present utility model.
Existing dust arrester comprises cyclone settling chamber 11, one-level cooler 12, secondary coolers 13, thick gas blower fan 14, plural tablecloth bag dust collector 15, pure qi (oxygen) blower fan 16, closed conveying scrapper conveyor 17, ash-storing bin 18.
The entrance termination furnace gas of described cyclone settling chamber 11 is carried flue 100, and described cyclone settling chamber 11, one-level cooler 12, secondary coolers 13 and plural tablecloth bag dust collector 15 are communicated with successively.Be respectively equipped with one-level cooling blower 122 and secondary cooling blower 132 on described one-level cooler 12, the secondary coolers 13.The entrance of plural number tablecloth bag dust collector 15 is communicated with the outlet of thick gas blower fan 14, plural tablecloth bag dust collector 15 parallel connections.Pure qi (oxygen) blower fan 16 is arranged on the exhaust pass of plural tablecloth bag dust collector 15.Closed conveying scrapper conveyor 17 is arranged on the lower end of cyclone settling chamber 11, one-level cooler 12, secondary coolers 13 and plural tablecloth bag dust collector 15 and is communicated with the lower end of cyclone settling chamber 11, one-level cooler 12, secondary coolers 13 and plural tablecloth bag dust collector 15.Ash-storing bin 18 is arranged on closed conveying scrapper conveyor 17 ports of export.
After high temperature dust closed electric furnace furnace gas is pre-cooled through the water cold sleeve (not shown), furnace gas temperature is down to 300～500 ℃, then gas carries flue to enter cyclone settling chamber 11 by furnace gas, and then enter one-level cooler 12, secondary coolers 13, slightly large dust is delivered to ash-storing bin 18 through closed conveying scrapper conveyor 17, slightly little dust is lowered the temperature with furnace gas, deliver in the sack cleaner 15 of plural platform parallel connection through thick gas blower fan 14, extract out through pure qi (oxygen) blower fan 16 again through the furnace gas of sack cleaner 15 and be sent to limekiln or other use.The dust that cyclone settling chamber 11, one-level cooler 12, secondary coolers 13 and plural tablecloth bag dust collector 15 are collected is delivered to ash-storing bin 18 through closed conveying scrapper conveyor 17, transports outward by automobile airtight at last.
Described every group of bypass sack cleaner comprises sack cleaner 25 and the pure qi (oxygen) blower fan 26 of plural platform parallel connection.The entrance of plural number tablecloth bag dust collector 25 is communicated with the outlet of thick gas blower fan 14, also is that the port of export of above-mentioned thick gas blower fan 14 arranges two branch roads.Pure qi (oxygen) blower fan 26 is arranged on the exhaust pass of plural tablecloth bag dust collector 25.The lower end of plural number tablecloth bag dust collector 25 is communicated with described closed conveying scrapper conveyor 17.
Between described sack cleaner 15 and thick gas blower fan 14, one first transfer valve 101 is set, between described sack cleaner 25 and thick gas blower fan 14, one second transfer valve 102 is set, described the first transfer valve 101 and the second transfer valve 102 all are connected to the PLC control system, are switched by the control of PLC control system.Described PLC control system can be CPU or control circuit.
Under normal circumstances, use existing dust arrester to carry out dedusting, under the abnormal condition, when the electric furnace special circumstances such as material of collapsing occur, the moment flue gas that produces, because time moment is too short, cooler also has little time flue gas is cooled off, thereby high-temperature flue gas enters sack cleaner 15 cloth bag of sack cleaner 15 the insides is all burnt.At this moment, can close the first transfer valve 101 by the control of PLC control system, open the second transfer valve 102, bypass sack cleaner startup work, thus can change the cloth bag that is burned in the existing dust arrester.When the utility model can also be used existing sack cleaner 15 needs maintenance, also can switch to the work of bypass sack cleaner by transfer valve, thereby when changing cloth bag and overhaul of the equipments, all do not need blowing out, thereby improved production capacity, avoid causing the loss of economic interests.
This has the capital equipment explanation of the closed electric furnace dry-method dust-removal device of bypass sack cleaner.
1, cyclone settler
According to closed electric furnace in process of production furnace gas can take high temperature carbon granule and the higher characteristics of dust concentration such as coke or blue carbon out of, for fear of because gas temperature is spent low tar in the furnace gas is analysed and because the too high consequence of burning dust-collecting bag of gas temperature, selected cyclone settler 11, described cyclone settler 11,21 can adopt existing commercially available cyclone settler, also can select the cyclone tube-type combined cooler of the applicant's patent No. 201010108784.1.The selecting of cyclone settler 11 can effectively be avoided the loss that causes greatly owing to closed electric furnace furnace gas temperature instantaneous variation, guarantees the stability of furnace gas, gives on the other hand the reaction time of cooling blower abundance.Cooling blower adopts the frequency control blower fan, and chain with the outlet furnace gas temperature.When the furnace gas parameter changes, automatically regulate cold flow, control furnace gas export temperature is about 220 ℃.
2, one-level cooler, the secondary coolers in the existing dust arrester
One-level cooler 12, secondary coolers 13 in the existing dust arrester and what select all is heat pipe air coolers.The heat pipe air cooler can high efficiencyly be lowered the temperature, and prevents that containing the Mars particle from electric furnace gas out enters sack cleaner, causes cloth bag to burn.Prolong the service life of bags in bag-type dust remover, guarantee efficiency of dust collection, and the heat pipe air cooler is in the situation that fluctuation of operating conditions can carry out effective temperature control.In the control of the cooling blower of many heat pipes air cooler, be equipped with VFC, purpose is in order further to carry out temperature control, namely one-level cooling blower 122, the secondary cooling blower 132 in the existing dust arrester is the frequency control blower fan.When entering the sack cleaner furnace gas temperature and be lower than 220 ℃, control frequency control blower fan is turned cooling air quantity automatically down, reduces heat exchange, improves the cooler outlet furnace gas temperature and is controlled between 220～260 ℃ to guarantee the furnace gas temperature that enters sack cleaner.When entering the sack cleaner furnace gas temperature and be higher than 260 ℃, the frequency control blower fan tunes up cooling air quantity automatically, increases heat exchange, reduces the cooler outlet furnace gas temperature, makes it arrive predetermined temperature.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (5)
1. closed electric furnace dry-method dust-removal device with bypass sack cleaner, comprise existing dust arrester, existing dust arrester comprises cyclone settling chamber (11), one-level cooler (12), secondary coolers (13), thick gas blower fan (14), plural number platform the first sack cleaner (15), the first pure qi (oxygen) blower fan (16), closed conveying scrapper conveyor (17), ash-storing bin (18), the entrance termination furnace gas of described cyclone settling chamber (11) is carried flue (100), described cyclone settling chamber (11), one-level cooler (12), secondary coolers (13) and plural platform the first sack cleaner (15) are communicated with successively, thick gas blower fan (14) is arranged between secondary coolers (13) and plural platform the first sack cleaner (15), the parallel connection of plural number platform the first sack cleaner (15), the first pure qi (oxygen) blower fan (16) is arranged on the exhaust pass of plural platform the first sack cleaner (15), cyclone settling chamber (11), one-level cooler (12), the lower end of secondary coolers (13) and plural platform the first sack cleaner (15) is communicated with ash-storing bin (18) by closed conveying scrapper conveyor (17), it is characterized in that:
Described thick gas blower fan (14) port of export is provided with two branch roads: the first branch road and the second branch road, described plural platform the first sack cleaner (15) is arranged on the first branch road, be provided with one first transfer valve (101) at the arrival end of described plural platform the first sack cleaner (15) and the first branch road between thick gas blower fan (14) outlet, described closed electric furnace dry-method dust-removal device with bypass sack cleaner also comprises at least one group of bypass sack cleaner that is arranged on described the second branch road, described every group of bypass sack cleaner comprises the second sack cleaner (25) and the one second pure qi (oxygen) blower fan (26) of plural platform parallel connection, the second pure qi (oxygen) blower fan (26) is arranged on the exhaust pass of plural platform the second sack cleaner (25), the entrance of described the second sack cleaner (25) and thick gas blower fan (14) outlet communicate, be provided with one second transfer valve (102) at the arrival end of described the second sack cleaner (25) and the second branch road between thick gas blower fan (14) outlet, the lower end of plural platform the second sack cleaner (25) is communicated with ash-storing bin (8) by described closed conveying scrapper conveyor (17).
2. the closed electric furnace dry-method dust-removal device with bypass sack cleaner according to claim 1 is characterized in that: be respectively equipped with one-level cooling blower (122) and secondary cooling blower (132) on described one-level cooler (12), the secondary coolers (13).
3. the closed electric furnace dry-method dust-removal device with bypass sack cleaner according to claim 2 is characterized in that: one-level cooling blower (122) and secondary cooling blower (132) in the existing dust arrester are the frequency control blower fan.
4. the closed electric furnace dry-method dust-removal device with bypass sack cleaner according to claim 1 is characterized in that: what one-level cooler (12), the secondary coolers (13) in the existing dust arrester selected all is heat pipe air coolers.
5. the closed electric furnace dry-method dust-removal device with bypass sack cleaner according to claim 1, it is characterized in that: described the first transfer valve (101) and the second transfer valve (102) all are connected to a PLC control system, are switched by the control of PLC control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220147073XU CN202666580U (en) | 2012-04-10 | 2012-04-10 | Inclosed electric furnace dry method dust removing device provided with bypass bag-type dust removers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220147073XU CN202666580U (en) | 2012-04-10 | 2012-04-10 | Inclosed electric furnace dry method dust removing device provided with bypass bag-type dust removers |
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| CN202666580U true CN202666580U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220147073XU Expired - Fee Related CN202666580U (en) | 2012-04-10 | 2012-04-10 | Inclosed electric furnace dry method dust removing device provided with bypass bag-type dust removers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105797527A (en) * | 2016-05-18 | 2016-07-27 | 山东电力建设第工程公司 | Device for preventing induced draft fan from being abraded in oil-coal co-combustion stage and operation method thereof |
| CN112138475A (en) * | 2020-09-30 | 2020-12-29 | 中冶焦耐(大连)工程技术有限公司 | Distributed dust removal system for smoke dissipated by coke oven and working method thereof |
-
2012
- 2012-04-10 CN CN201220147073XU patent/CN202666580U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105797527A (en) * | 2016-05-18 | 2016-07-27 | 山东电力建设第工程公司 | Device for preventing induced draft fan from being abraded in oil-coal co-combustion stage and operation method thereof |
| CN112138475A (en) * | 2020-09-30 | 2020-12-29 | 中冶焦耐(大连)工程技术有限公司 | Distributed dust removal system for smoke dissipated by coke oven and working method thereof |
| CN112138475B (en) * | 2020-09-30 | 2024-01-30 | 中冶焦耐(大连)工程技术有限公司 | Coke oven dissipation smoke dust distributed dust removal system and working method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230011 Anhui city in Hefei Province, the new station thirty Patentee after: ANHUI YUANCHEN ENVIRONMENT PROTECTION TECHNOLOGY CO., LTD. Address before: 230011 Anhui city in Hefei Province, the new station thirty Patentee before: Anhui YuanChen Environmental Protention Science and Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20160410 |