CN102636038A - Bypass ventilating process flow - Google Patents
Bypass ventilating process flow Download PDFInfo
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- CN102636038A CN102636038A CN2012100891609A CN201210089160A CN102636038A CN 102636038 A CN102636038 A CN 102636038A CN 2012100891609 A CN2012100891609 A CN 2012100891609A CN 201210089160 A CN201210089160 A CN 201210089160A CN 102636038 A CN102636038 A CN 102636038A
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- heat boiler
- waste heat
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- kiln
- expansion chamber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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Abstract
The invention relates to a bypass ventilating process flow in the field of cement production. The bypass ventilating process flow comprises the following steps of: extracting high-temperature gas in a kiln-tail smoke chamber to a settling chamber for carrying out settling treatment, and then extracting the gas after settlement to a waste-heat boiler for cooling; then extracting the cooled gas to a bag dust collector, conveying dust settled in the waste-heat boiler to a kiln-ash bin for storage by corresponding conveying equipment, and simultaneously, combining steam generated by the waste-heat boiler with steam generated by other boilers at the kiln tail for comprehensive utilization; and finally, extracting clean gas filtered by the bag dust collector to a kiln-tail chimney for exhausting by a fan. The bypass ventilating process flow not only can effectively solve the problems of skinning and blocking caused by high-volatility ingredients such as alkali, chlorine and sulfur carried by materials and fuel as well as when various solid wastes are eliminated by utilizing a cement rotary kiln system in the cement production process, but also can effectively reduce extra energy consumption loss in the production system and correspondingly reduce the production cost.
Description
[technical field]
The present invention relates to the collaborative municipal refuse field of dissolving of manufacture of cement and cement kiln, especially relate to a kind of bypass technological process of in the manufacture of cement flow process, using.
[background technology]
Known; When producing cement; Because the high volatile ingredients such as alkali, chlorine and sulphur that contained in former, the fuel, or the high volatile ingredients of when utilizing the cement rotary kiln system handles to dissolve various solid waste, being brought into such as alkali, chlorine and sulphur all can cause skinning and obstruction in process of production, thereby have influence on the normal operation of cement kiln system; Therefore, in the process of producing cement, just must adopt the technology of leaking informaton to solve skinning and the clogging that occurs in the system; The described technology of leaking informaton; Utilize the bypass technological process to emit the part kiln gas exactly at the kiln tail smoke-box place that above-mentioned height evaporates into the branch enrichment; Thereby destroy these high volatile ingredients in intrasystem circulation; Effectively reduce the content of alkali, chlorine and sulphur in the grog whereby, prevent in system, to occur the skinning clogging, promptly can be directly connected to the height of cement production system running rate and energy consumption as the bypass technological process that influences one of cement production process key link; At present; What existing bypass technological process was adopted basically is to leak informaton a little in the setting of kiln tail smoke-box; Near leaking informaton a little, blast suitable air quantity then, carry out sufficient heat exchange with thermal current in that vortex mixed is indoor, and the gas flow temperature that will go out mixing chamber is controlled at 350～400 ℃ through the quenching blower fan; Through further adding cold air or through the heat exchanger before the dust-precipitator air-flow of emitting is cooled to less than 250 ℃ again, after bag collector is handled the back discharging; But; In long-term practical application, find; Existing bypass technological process meeting causes the loss of extra hear rate of cement production system and material consumption; And, play in the bypass technological process that to mix the dust-precipitator and the exhaust blower type selecting of cold wind bigger for system, corresponding the high of production cost that caused.
[summary of the invention]
In order to overcome the deficiency in the background technology; The invention provides a kind of bypass technological process; That the described technological process of leaking informaton not only can effectively solve is former, fuel and the high volatile ingredients such as alkali, chlorine and sulphur brought into when utilizing the cement rotary kiln system handles to dissolve various solid waste cause in cement production process skinning and blockage problem, and can effectively reduce in the production system additional energy consumption loss and reduce production costs accordingly.
For realizing the foregoing invention purpose, the present invention adopts following technical scheme:
A kind of bypass technological process, the device of implementing said technological process comprises expansion chamber, waste heat boiler, bag collector and blower fan; Air inlet on the described expansion chamber is communicated with kiln tail smoke-box with bulky grain sedimentation mouth, and the air outlet of expansion chamber is communicated with the import of bag collector through waste heat boiler; Described bag collector outlet is communicated with kiln tail chimney through blower fan; Described technological process is:
A, through blower fan the high-temperature gas in the kiln tail smoke-box is extracted to expansion chamber, the tolerance that is extracted accounts for 3%～6% of kiln gas total amount;
B, utilize expansion chamber to carry out sedimentation and handle, and the bulky grain sedimentation mouth through expansion chamber drain back to kiln tail smoke-box with the big dust particle of sedimentation to extracting the big dust particle that contains to the indoor high-temperature gas;
C, the gas after the sedimentation is evacuated to waste heat boiler, and high-temperature gas is cooled to rapidly below 250 ℃ through waste heat boiler;
D, cooled gas in the waste heat boiler is evacuated to bag collector; Simultaneously; The dust that settles down in the waste heat boiler is delivered to kiln ash storehouse through the dust mouth of boiler bottom setting by corresponding conveying equipment to be stored; In addition, the steam that waste heat boiler is produced is incorporated in the SP waste heat boiler of kiln tail or the steam that the PH waste heat boiler is produced so that comprehensive utilization;
E, the gas in the suction device is filtered through bag collector; And utilize the clean air after blower fan will filter to be evacuated to the discharge of kiln tail chimney; Simultaneously, the dust mouth that the dust that the bag collector inner filtration is got off is provided with through the bag collector bottom is transported to kiln ash storehouse by corresponding conveying equipment and stores.
Described bypass technological process, the flow process of the high-temperature gas in the said technological process in the waste heat boiler is: inlet flue duct → high temperature superheater → low temperature superheater → evaporimeter → economizer → exhaust pass; Simultaneously, the flow process of feedwater is in the waste heat boiler: go up feedwater → economizer → drum → evaporimeter and fin panel casing → drum → low temperature superheater → attemperator → high temperature superheater → superheated steam.
Described bypass technological process, the air outlet of the expansion chamber in the said technological process are made as 270 ° big cornerite spiral cases, be air inlet and bulky grain sedimentation mouth along the spiral case axis direction, and the air outlet of expansion chamber are corresponding with axis vertical.
Be provided with high temperature cut-off valve in the described bypass technological process, said technological process middle setting chamber and pipeline that waste heat boiler is communicated with.
Described bypass technological process is provided with cold blast sliding valve in waste heat boiler and the pipeline that dust-precipitator is communicated with in the said technological process.
Described bypass technological process, the blower fan in the said technological process is provided with RHVC.
Owing to adopted technique scheme, the present invention to have following beneficial effect:
Bypass technological process integral layout of the present invention is simple; Easy to operate; Skinning and blockage problem that the high volatile ingredients of being brought in the time of not only can effectively solving former, fuel and utilize the cement rotary kiln system handles to dissolve various solid waste such as alkali, chlorine and sulphur cause in cement production process; But also can the heat of the high-temperature gas that extracts be fully utilized, thereby the purpose that has reached additional energy consumption loss in effective minimizing production system and reduced production costs.
[description of drawings]
Fig. 1 is a sketch map of the present invention.
Among the figure: 1, expansion chamber; 2, waste heat boiler; 3, bag collector; 4, blower fan; 5, kiln tail smoke-box; 6, kiln tail chimney; 7, dust mouth a; 8, dust mouth b.
[specific embodiment]
Can explain the present invention in more detail through following embodiment, open the object of the invention is intended to protect all variations and the improvement in the scope of the invention, and the present invention is not limited to following embodiment;
In conjunction with the described bypass technological process of accompanying drawing 1 embodiment of the present invention, a kind of bypass technological process, the device of implementing said technological process comprises expansion chamber 1, waste heat boiler 2, bag collector 3 and blower fan 4; Air inlet on the described expansion chamber 1 is communicated with kiln tail smoke-box 5 with bulky grain sedimentation mouth, and the air outlet of expansion chamber 1 is communicated with the import of bag collector 3 through waste heat boiler 2; Described bag collector 3 outlets are communicated with kiln tail chimney 6 through blower fan 4; Described technological process is:
A, the suction through blower fan 4 are evacuated to expansion chamber 1 with the high-temperature gases in the kiln tail smoke-box 5, and the tolerance that is extracted accounts for 3%～6% of kiln gas total amount;
B, utilize the big dust particle that contains in 1 pair of extraction of expansion chamber to its indoor high-temperature gas to carry out sedimentation to handle; And the big dust particle that settles down is drained back to kiln tail smoke-box 5, thereby to avoid big dust particle to cause the phenomenon of washing away damage and causing boiler to shorten service life to take place to the waste heat boiler in next link 2 through the bulky grain sedimentation mouth of expansion chamber 1; As required; Can the air outlet of expansion chamber 1 be made as 270 ° of big cornerite spiral cases; And corresponding air inlet and bulky grain sedimentation mouth are set along the axis direction of spiral case; And the air outlet of expansion chamber 1 is corresponding with axis vertical, thereby the larger particles that the high-temperature flue gas that extracts is contained can be easier to settle down in expansion chamber 1;
C, the gas after the sedimentation is evacuated to waste heat boiler 2, and high-temperature gas is cooled to rapidly below 250 ℃ through waste heat boiler 2; When production operation, can in expansion chamber 1 and pipeline that waste heat boiler 2 is communicated with, high temperature cut-off valve be set, thus the air quantity of being convenient to utilize high temperature cut-off valve to regulate and leaking informaton; Described waste heat boiler cools off the high-temperature gas in the boiler by following flow process: inlet flue duct → high temperature superheater → low temperature superheater → evaporimeter → economizer → exhaust pass; Simultaneously, the flow process of feedwater is in the waste heat boiler 2: go up feedwater → economizer → drum → evaporimeter and fin panel casing → drum → low temperature superheater → attemperator → high temperature superheater → superheated steam;
D, cooled gas in the waste heat boiler 2 is evacuated to bag collector 3, for the gas temperature further guaranteeing to get into bag collector 3 less than 250 ℃, can in waste heat boiler 2 and pipeline that bag collector 3 is communicated with, corresponding cold blast sliding valve be set; Simultaneously; A 7 is delivered to kiln ash storehouse by corresponding conveying equipment and stores through the dust mouth of boiler bottom setting with the dust that settles down in the waste heat boiler 2; In addition; The steam that waste heat boiler 2 is produced incorporates in the SP waste heat boiler of kiln tail or the steam that the PH waste heat boiler is produced so that comprehensive utilization, thus the corresponding heat utilization ratio that improved;
E, filter through the gas in 3 pairs of suction devices of bag collector; And utilize the clean air after blower fan 4 will filter to be evacuated to 6 discharges of kiln tail chimney; Simultaneously, the dust mouth b 8 that the dust that bag collector 3 inner filtrations is got off is provided with through bag collector 3 bottoms is transported to kiln ash storehouse by corresponding conveying equipment and stores; In addition, the blower fan 4 in the said technological process is provided with RHVC, thereby is more conducive to the air quantity that timely adjustment is in process of production leaked informaton; The dust of storage can be sent into the cement production system or solidify landfill through corresponding equipment in bulk in the kiln ash storehouse.
Because cooling device and the corresponding cooling procedure of in tradition is leaked informaton technological process, using saved in described technological process; Then adopt waste heat boiler 2 that the elevated temperature heat flue gas temperature in the stove is reduced to rapidly below the skinning temperature; So that the high volatile ingredient that is contained in the high-temperature gas can not be bonded on the limit wall of system equipment; And the steam that produce in the waste heat boiler 2 can also be incorporated in the steam that other boiler of kiln tail produced and are used, and therefore, implement described technological process and not only can avoid in cement production process, producing skinning and clogging; And improve heat utilization efficiency, but also can save investment of devices and operating cost in the whole flow process.
Carefully not stating in the above content is prior art partly, does not state so run business into particular one.
Claims (6)
1. bypass technological process is characterized in that: the device of implementing said technological process comprises expansion chamber (1), waste heat boiler (2), bag collector (3) and blower fan (4); Air inlet on the described expansion chamber (1) is communicated with kiln tail smoke-box (5) with bulky grain sedimentation mouth, and the air outlet of expansion chamber (1) is communicated with the import of bag collector (3) through waste heat boiler (2); Described bag collector (3) outlet is communicated with kiln tail chimney (6) through blower fan (4); Described technological process is:
A, through blower fan (4) high-temperature gas in the kiln tail smoke-box (5) is extracted to expansion chamber (1), the tolerance that is extracted accounts for 3%～6% of kiln gas amount;
B, utilize expansion chamber (1) to carry out sedimentation and handle, and the bulky grain sedimentation mouth through expansion chamber (1) drain back to kiln tail smoke-box (5) with the big dust particle of sedimentation to extracting the big dust particle that contains to the indoor high-temperature gas;
C, will be in expansion chamber (1) gas of sedimentation after handling be evacuated to waste heat boiler (5), and high-temperature gas is cooled to rapidly below 250 ℃ through waste heat boiler (5);
D, cooled gas in the waste heat boiler (2) is evacuated to bag collector (3); Simultaneously; The dust that settles down in the waste heat boiler (2) is delivered to kiln ash storehouse through the dust mouth a (7) of boiler bottom setting by corresponding conveying equipment to be stored; In addition, the steam that waste heat boiler (2) is produced is incorporated in the SP waste heat boiler of kiln tail or the steam that the PH waste heat boiler is produced so that comprehensive utilization;
E, the gas in the suction device is filtered through bag collector (3); And utilize the clean air after blower fan (4) will filter to be evacuated to kiln tail chimney (6) discharge; Simultaneously, the dust mouth b (8) that the dust that bag collector (3) inner filtration is got off is provided with through bag collector (3) bottom is transported to kiln ash storehouse by corresponding conveying equipment and stores.
2. bypass technological process according to claim 1 is characterized in that: the flow process of the high-temperature gas in the waste heat boiler in the said technological process (2) is: inlet flue duct → high temperature superheater → low temperature superheater → evaporimeter → economizer → exhaust pass; Simultaneously, the flow process of feedwater is in the waste heat boiler (2): go up feedwater → economizer → drum → evaporimeter and fin panel casing → drum → low temperature superheater → attemperator → high temperature superheater → superheated steam.
3. bypass technological process according to claim 1; It is characterized in that: the air outlet of the expansion chamber in the said technological process (1) is made as 270 ° big cornerite spiral cases; Along the spiral case axis direction is air inlet and bulky grain sedimentation mouth, and the air outlet of expansion chamber (1) is corresponding with axis vertical.
4. bypass technological process according to claim 1 is characterized in that: be provided with high temperature cut-off valve in said technological process middle setting chamber (1) and the pipeline that waste heat boiler (2) is communicated with.
5. bypass technological process according to claim 1 is characterized in that: be provided with cold blast sliding valve in waste heat boiler in the said technological process (2) and the pipeline that bag collector (3) is communicated with.
6. bypass technological process according to claim 1 is characterized in that: the blower fan in the said technological process (4) is provided with RHVC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100891609A CN102636038A (en) | 2012-03-30 | 2012-03-30 | Bypass ventilating process flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100891609A CN102636038A (en) | 2012-03-30 | 2012-03-30 | Bypass ventilating process flow |
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| Publication Number | Publication Date |
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| CN102636038A true CN102636038A (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100891609A Pending CN102636038A (en) | 2012-03-30 | 2012-03-30 | Bypass ventilating process flow |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601385A (en) * | 2013-11-13 | 2014-02-26 | 平阴山水水泥有限公司 | Kiln dust collection device |
| CN104874242A (en) * | 2015-05-29 | 2015-09-02 | 扬中市第一蝶阀厂有限公司 | Granular layer filtration device based dust cleaning system |
| CN105444582A (en) * | 2015-12-16 | 2016-03-30 | 上海三橙能源科技有限公司 | Cement kiln tail flue gas treatment device and technological method characterized by combination of bypass air release and staged combustion |
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| JP2010042971A (en) * | 2008-08-18 | 2010-02-25 | Mitsubishi Materials Corp | Method for controlling operation of cement manufacturing apparatus and cement manufacturing apparatus |
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| CN202012897U (en) * | 2011-01-24 | 2011-10-19 | 大连易世达新能源发展股份有限公司 | Cement kiln tail bypass wind discharging exhaust-heat boiler |
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-
2012
- 2012-03-30 CN CN2012100891609A patent/CN102636038A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009092645A1 (en) * | 2008-01-24 | 2009-07-30 | Flsmidth A/S | Drier crusher installation |
| JP2010042971A (en) * | 2008-08-18 | 2010-02-25 | Mitsubishi Materials Corp | Method for controlling operation of cement manufacturing apparatus and cement manufacturing apparatus |
| CN102080582A (en) * | 2010-12-06 | 2011-06-01 | 南京凯盛开能环保能源有限公司 | Coal-fired power generation and waste heat power generation coupling system for private station of cement kiln |
| CN202012897U (en) * | 2011-01-24 | 2011-10-19 | 大连易世达新能源发展股份有限公司 | Cement kiln tail bypass wind discharging exhaust-heat boiler |
| CN102393148A (en) * | 2011-11-08 | 2012-03-28 | 大连易世达新能源发展股份有限公司 | Cement kiln tail by-pass waste heat power generation device |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601385A (en) * | 2013-11-13 | 2014-02-26 | 平阴山水水泥有限公司 | Kiln dust collection device |
| CN104874242A (en) * | 2015-05-29 | 2015-09-02 | 扬中市第一蝶阀厂有限公司 | Granular layer filtration device based dust cleaning system |
| CN105444582A (en) * | 2015-12-16 | 2016-03-30 | 上海三橙能源科技有限公司 | Cement kiln tail flue gas treatment device and technological method characterized by combination of bypass air release and staged combustion |
| CN105444582B (en) * | 2015-12-16 | 2017-11-10 | 上海三橙能源科技有限公司 | A kind of combined and staged kiln exit gas processing unit and the process of burning of cement kiln bypass |
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Application publication date: 20120815 |