CN202814134U - Wind-taking smoke temperature adjusting system at tail of dry method cement production line coal mill kiln - Google Patents
Wind-taking smoke temperature adjusting system at tail of dry method cement production line coal mill kiln Download PDFInfo
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- CN202814134U CN202814134U CN2012204669177U CN201220466917U CN202814134U CN 202814134 U CN202814134 U CN 202814134U CN 2012204669177 U CN2012204669177 U CN 2012204669177U CN 201220466917 U CN201220466917 U CN 201220466917U CN 202814134 U CN202814134 U CN 202814134U
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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
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Abstract
The utility model discloses a wind-taking smoke temperature adjusting system at the tail of a dry method cement production line coal mill kiln with better working condition adaptability. Expect a wind-taking flue which is connected between an air outlet of an SP boiler at the tail of the kiln and an air inlet of a coal mill deduster, a bypass wind-taking flue is connected in parallel on the wind-taking flue in front of the air inlet of the coal mill deduster. A wind-taking opening of the bypass wind-taking flue is an air outlet of a first-level cyclone cylinder at the tail of the kiln. The bypass wind-taking flue is provided with a fan, and a recycling flue provided with a circulating control valve is connected in parallel between the air inlet and the air outlet of the fan. Control valves and expansion joints are arranged on the bypass wind-taking flue in front of the fan and behind the fan. High temperature flue of the first level cyclone cylinder at the cement kiln tail is extracted and combined with low temperature flue at the outlet of the residual heat SP boiler of the cement kiln, so that not only is the demand of production of a coal mill met, but also the residual heat resource is adequately utilized. The wind-taking smoke temperature adjusting system is reliable in operation and beneficial to the improvement of the generating capacity, and particularly suitable for wind-taking smoke temperature adjustment at the tail of the dry method cement production line coal mill kiln.
Description
Technical field
The utility model relates to the coal mill wind-warm syndrome regulation technology field of the dry cement production line of the supporting electricity generation system that has surplus heat, the heat regulation when especially its coal mill oven dry thermal source is from the kiln tail.
Background technology
At present, in the new type nonaqueous cement production line, the oven dry hot blast of coal mill has from kiln head air taking or from the kiln tail gets the wind dual mode.If get wind from the kiln tail, after afterheat generating system puts into operation, general technological process is the low-temperature flue gas oven dry coal mill that adopts kiln tail SP boiler export, because this flue gas is about 170～210 ℃, can cause following impact to the operation of coal mill Workshop Production: first, when former moisture content of coal was excessive, the temperature of the flue gas of SP boiler export can't satisfy the production requirement of coal mill; The second, during former moisture content of coal change, the flue gas heat that enters the coal mill can't be regulated, and is difficult to make the coal mill to move under optimum condition.The high-temperature flue gas oven dry coal that also has independent employing kiln tail one-level cyclone cylinder to export in the prior art grinds, generally will mix cold wind and be grinding into the requirement of one's intention as revealed in what one says temperature to reach coal this moment, this just fails to utilize about 170～210 ℃ flue gas of SP boiler export, causes the waste of a large amount of residual heat resources.
The utility model content
Get the wind mode deficiency not good to working conditions change adaptability in order to overcome existing dry cement production line coal mill, technical problem to be solved in the utility model provides the better dry cement production line coal mill of a kind of adaptability for working condition kiln tail and gets the wind smoke temperature adjusting system.
The technical scheme that its technical problem that solves the utility model adopts is: dry cement production line coal mill kiln tail is got the wind smoke temperature adjusting system, comprise and get the wind and smoke road between the air inlet of the air outlet that is connected to kiln tail SP boiler and coal mill deduster, get on the wind and smoke road and be provided with control valve, the wind and smoke road of getting before the air inlet of coal mill deduster is parallel with bypass and gets the wind and smoke road, bypass is got and is provided with the first control valve and blower fan on the wind and smoke road, and the air outlet that the air port is kiln tail one-level cyclone cylinder of getting in wind and smoke road is got in bypass.
The recirculating gas duct that is provided with circulation control valve also in parallel between the air inlet of described blower fan and the air outlet, described the first control valve is arranged on blower fan and grinds between the air inlet of deduster with coal.
Described the first control valve and interlock of fan control and simultaneously switching.
Get getting of wind and smoke road in blower fan and bypass and also be provided with the second control valve between the air port.
Described bypass is got on the wind and smoke road and is provided with expansion joint.
Described blower fan is adjustable speed fan.
The beneficial effects of the utility model are: by extracting cement kiln end one-level cyclone cylinder high-temperature flue gas, mix with cement kiln waste heat SP boiler export low-temperature flue gas, both can satisfy the requirement that the coal mill is produced, also realized taking full advantage of of residual heat resources, reliable, be conducive to improve generated energy, especially be suitable for dry cement production line coal mill kiln tail and get the adjusting of wind flue-gas temperature.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Be labeled as 1-blower fan, 2-the second control valve, 3-the second expansion joint, 4-the first expansion joint among the figure, 5-the first control valve, 6-circulation control valve, 7-control valve, 8-kiln tail SP boiler, 9-kiln tail one-level cyclone cylinder, 10-coal mill deduster, 11-gets the wind and smoke road, and the wind and smoke road is got in the 12-bypass, the 13-recirculating gas duct.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As shown in Figure 1, dry cement production line coal of the present utility model mill kiln tail is got the wind smoke temperature adjusting system and is comprised that the air outlet that is connected to kiln tail SP boiler 8 and coal grind and get wind and smoke road 11 between the air inlet of deduster 10, get and be provided with control valve 7 on the wind and smoke road 11, the wind and smoke road 11 of getting before the air inlet of coal mill deduster 10 is parallel with bypass and gets wind and smoke road 12, bypass is got and is provided with the first control valve 5 and blower fan 1 on the wind and smoke road 12, and the air outlet that the air port is kiln tail one-level cyclone cylinder 9 of getting in wind and smoke road 12 is got in bypass.Compared with prior art, key is to have increased bypass and gets wind and smoke road 12, can extract as required the outlet hot blast of kiln tail one-level cyclone cylinder 9, the outlet flue gas that mixes simultaneously a part of kiln tail SP boiler 8, be used for the workshop oven dry of coal mill after delivering to 10 dedustings of cement wire system coal mill deduster, thereby can just judge according to the moisture of raw coal in the coal mill heat demand of coal mill, provide the flue gas with preference temperature to dry, both can satisfy the requirement that the coal mill is produced, also realize taking full advantage of of residual heat resources.
Produce negative pressure such as the blower fan import in the blower fan stoppage in transit process or in the blower fan shutdown process motor undercapacity, in the time of can't overcoming blower fan import negative pressure, fan blade reverse rotation accident may occur, be called the blower fan reversing.In addition, even considering bypass in the actual condition gets the control valve in wind and smoke road 12 and also might exist when closing and leak out, for avoiding the blower fan reversing to affect the efficient operation of afterheat generating system, also be arranged in parallel the recirculating gas duct 13 of circulation control valve 6 between the air inlet of described blower fan 1 and the air outlet, described the first control valve 5 is arranged between the air inlet of blower fan 1 and coal mill deduster 10, when blower fan 1 entrance end has pressure differential, circulation in blower fan 1 and recirculating gas duct 13 form, avoid fan trouble to disturb production line, safeguards system safety.
Get wind and smoke road 12 and can work, preferred described the first control valve 5 and blower fan 1 interlocked control and simultaneously switching for guaranteeing blower fan 1 and bypass.
Preferably get getting of wind and smoke road 12 in blower fan 1 and bypass and also be provided with the second control valve 2 between the air port, thereby before blower fan 1 opens, shuts down, cooperate to regulate the air quantity of getting that wind and smoke road 12 is got in bypass with circulation control valve 6, the first control valve 5.
Because flue-gas temperature will be determined according to the heat demand of coal mill, therefore, the flue gas fluctuation that bypass is got in the wind and smoke road 12 is larger, preferably get wind and smoke road 12 in described bypass and be provided with expansion joint, the design parameter of expansion joint and quantity are decided on situations such as flue length, cigarette wind character, flue layouts, are used for absorbing the swell increment that wind and smoke road 12 is got in bypass.
Preferred described blower fan 1 is adjustable speed fan, thereby can adapt to more multi-state.
Embodiment:
As shown in Figure 1, dry cement production line coal of the present utility model mill kiln tail is got the wind smoke temperature adjusting system and is comprised that the air outlet that is connected to kiln tail SP boiler 8 and coal grind and get wind and smoke road 11 between the air inlet of deduster 10, get and be provided with control valve 7 on the wind and smoke road 11, the wind and smoke road 11 of getting before the air inlet of coal mill deduster 10 is parallel with bypass and gets wind and smoke road 12, press flue gas flow direction, the air outlet that the air port is kiln tail one-level cyclone cylinder 9 of getting in wind and smoke road 12 is got in bypass, bypass is got and is disposed with the second expansion joint 3 on the wind and smoke road 12, the second control valve 2, blower fan 1, the first control valve 5 and the first expansion joint 4, the first control valve 5 and blower fan 1 interlocked control and simultaneously switching, the recirculating gas duct 13 that is provided with circulation control valve 6 also in parallel between the air inlet of blower fan 1 and air outlet, blower fan 1 is the adjustable speed fan by Frequency Converter Control, blower fan 1 is imported and exported and is respectively increased a perforate, connect for recirculating gas duct 13, flue connects can adopt welding, being connected between expansion joint and the flue adopts flange to connect, and each control valve is connected the connection of employing flange with flue.
The setting up procedure of this regulating system is:
Before blower fan 1 starts, check and guarantee that the first control valve 5 of the second control valve 2, blower fan 1 outlet closes that the circulation control valve 6 on the recirculating gas duct 13 is opened;
Start blower fan 1, open simultaneously the first control valve valve 5;
Adjust the frequency converter of blower fan 1, progressively strengthen rotation speed of fan, progressively turn down circulation control valve 6 simultaneously, make the entrance negative pressure of blower fan 1 be lower than the outlet negative pressure of kiln tail one-level cyclone cylinder 9;
Open the second control valve about 2 to 30%, complete shut-down circulation control valve 6;
Adjust frequency converter and the second control valve 2, final standard-sized sheet the second control valve 2 is to guarantee that coal is grinding into a mouthful temperature and meets the demands.
The shutdown step of this regulating system is:
At first, the second control valve 2 is closed extremely less than 30%;
Then, ON cycle control valve 6, complete shut-down the second control valve 2;
At last, blower fan 1 stops, and closes simultaneously the first control valve 5.
When former moisture content of coal is excessive, open blower fan 1 and the first control valve 5, get the outlet high-temperature flue gas that wind and smoke road 12 extracts a certain proportion of kiln tail one-level cyclone cylinder 9 by bypass, make flue-gas temperature satisfy the production requirement of coal mill.When former moisture content of coal was less, the outlet temperature of kiln tail SP boiler 8 was the caloric requirement that 170～210 ℃ low-temperature flue gas can satisfy oven dry coal mill, can close blower fan 1 and the first control valve 5.
By regulating the aperture of the second control valve 2, the first control valve 5, utilize frequency converter to regulate the rotating speed of blower fan 1, the controlled preparing high-temp flue gas amount of taking, the aperture of adjusting control valve 7, the outlet temperature that can control kiln tail SP boiler 8 is the amount of taking of 170～210 ℃ low-temperature flue gas, namely realized being grinding into the ratio that high-temperature flue gas and low-temperature flue gas are regulated in the requirement of mouthful flue-gas temperature according to coal, finally reach the purpose that the control coal is grinding into a mouthful flue-gas temperature, the coal mill is moved under optimum condition, realize the level utilization of thermal source.
The cement plant of other various supporting generatings that have surplus heat, coal are grinding into mouth to be needed to regulate temperature, also can adopt above-mentioned similar techniques scheme.
Claims (6)
1. dry cement production line coal mill kiln tail is got the wind smoke temperature adjusting system, comprise and get wind and smoke road (11) between the air inlet of the air outlet that is connected to kiln tail SP boiler (8) and coal mill deduster (10), get and be provided with control valve (7) on the wind and smoke road (11), it is characterized in that: the wind and smoke road (11) of getting before the air inlet of coal mill deduster (10) is parallel with bypass and gets wind and smoke road (12), bypass is got and is provided with the first control valve (5) and blower fan (1) on the wind and smoke road (12), and the air outlet that the air port is kiln tail one-level cyclone cylinder (9) of getting in wind and smoke road (12) is got in bypass.
2. dry cement production line coal mill kiln tail as claimed in claim 1 is got the wind smoke temperature adjusting system, it is characterized in that: the recirculating gas duct (13) that is provided with circulation control valve (6) also in parallel between the air inlet of described blower fan (1) and the air outlet, described the first control valve (5) is arranged on blower fan (1) and grinds between the air inlet of deduster (10) with coal.
3. dry cement production line coal mill kiln tail as claimed in claim 1 is got the wind smoke temperature adjusting system, it is characterized in that: described the first control valve (5) and blower fan (1) interlocked control and simultaneously switching.
4. get the wind smoke temperature adjusting system such as claim 1,2 or 3 described dry cement production line coals mill kiln tails, it is characterized in that: get getting of wind and smoke road (12) in blower fan (1) and bypass and also be provided with the second control valve (2) between the air port.
5. dry cement production line coal mill kiln tail as claimed in claim 4 is got the wind smoke temperature adjusting system, and it is characterized in that: described bypass is got on the wind and smoke road (12) and is provided with expansion joint.
6. get the wind smoke temperature adjusting system such as claim 1,2 or 3 described dry cement production line coal mill kiln tails, it is characterized in that: described blower fan (1) is adjustable speed fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204669177U CN202814134U (en) | 2012-09-13 | 2012-09-13 | Wind-taking smoke temperature adjusting system at tail of dry method cement production line coal mill kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204669177U CN202814134U (en) | 2012-09-13 | 2012-09-13 | Wind-taking smoke temperature adjusting system at tail of dry method cement production line coal mill kiln |
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|---|---|
| CN202814134U true CN202814134U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012204669177U Expired - Fee Related CN202814134U (en) | 2012-09-13 | 2012-09-13 | Wind-taking smoke temperature adjusting system at tail of dry method cement production line coal mill kiln |
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| CN (1) | CN202814134U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256825A (en) * | 2013-05-24 | 2013-08-21 | 北京工业大学 | Method for monitoring cement production soot emission and waste heat power generation system soot emission |
| CN111750682A (en) * | 2019-03-29 | 2020-10-09 | 川崎重工业株式会社 | Waste heat recovery system and operation method thereof |
-
2012
- 2012-09-13 CN CN2012204669177U patent/CN202814134U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256825A (en) * | 2013-05-24 | 2013-08-21 | 北京工业大学 | Method for monitoring cement production soot emission and waste heat power generation system soot emission |
| CN103256825B (en) * | 2013-05-24 | 2014-11-05 | 北京工业大学 | Method for monitoring cement production soot emission and waste heat power generation system soot emission |
| CN111750682A (en) * | 2019-03-29 | 2020-10-09 | 川崎重工业株式会社 | Waste heat recovery system and operation method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: The people of Wuhou District road Chengdu city Sichuan province 610041 four Branch Road No. 3 Patentee after: Chengdu Hot New Energy Technology Co., Ltd. Address before: The people of Wuhou District road Chengdu city Sichuan province 610041 four Branch Road No. 3 National 863 software incubator base in Sichuan 3 floor Patentee before: Chengdu Hot New Energy Technology Co., Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Wind-taking smoke temperature adjusting system at tail of dry method cement production line coal mill kiln Effective date of registration: 20140208 Granted publication date: 20130320 Pledgee: The Agricultural Bank of Chengdu branch of Limited by Share Ltd Chinese Sichuan Pledgor: Chengdu Hot New Energy Technology Co., Ltd. Registration number: 2014510000003 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| 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: 20130320 Termination date: 20170913 |