CN212610308U - Cement clinker firing production line capable of improving waste gas waste heat utilization rate - Google Patents

Cement clinker firing production line capable of improving waste gas waste heat utilization rate Download PDF

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Publication number
CN212610308U
CN212610308U CN202021017256.0U CN202021017256U CN212610308U CN 212610308 U CN212610308 U CN 212610308U CN 202021017256 U CN202021017256 U CN 202021017256U CN 212610308 U CN212610308 U CN 212610308U
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China
Prior art keywords
kiln tail
production line
waste heat
fan
vertical mill
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CN202021017256.0U
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Chinese (zh)
Inventor
李咪
周树强
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Anhui Conch Construction Materials Design Institute Co Ltd
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Anhui Conch Construction Materials Design Institute Co Ltd
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Abstract

The utility model discloses an improve waste gas waste heat utilization rate's cement clinker firing production line, including rotary kiln, dore furnace, kiln tail fan, raw materials vertical mill and kiln tail dust collector, rotary kiln, dore furnace, kiln tail fan and raw materials vertical mill link to each other in proper order, and the top of raw materials vertical mill links to each other with kiln tail dust collector, still includes the economizer, the economizer is established on kiln tail fan and raw materials vertical mill interface channel's bypass, and the export of economizer links to each other with kiln tail dust collector. By adding the bypass economizer, when the raw material powder grinding process system does not need a heat source, the waste heat of the 180-plus-200 ℃ waste gas after the waste heat power generation kiln tail boiler is matched with the clinker production line is further recovered, and the heat recovery and utilization efficiency of the whole production line is improved.

Description

Cement clinker firing production line capable of improving waste gas waste heat utilization rate
Technical Field
The utility model belongs to the technical field of cement clinker burns till production line technique and specifically relates to a cement clinker burns till production line that improves waste gas waste heat utilization rate.
Background
The raw material grinding system of the cement clinker sintering production line needs to extract waste hot air from the kiln tail as a heat source for drying raw materials according to the water content of the raw materials. The water content of the cement production raw materials is closely related to seasons; the comprehensive moisture of the raw materials in dry seasons is only 2-3%, the requirement of the raw material grinding system on a drying heat source is not high, and the operation rate of the raw material grinding system relative to the kiln is 80-85%, so that the raw material grinding system does not need the drying heat source in 15-20% of the operation time of the clinker production line; when a raw material grinding system does not need a drying heat source in the existing production line, high-temperature waste gas behind a kiln tail is directly discharged, so that waste heat is wasted.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model aims to solve the technical problem that a cement clinker firing production line for improving waste gas waste heat utilization rate is provided, it can improve the waste heat resource utilization rate of kiln tail waste gas.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
this improve cement clinker firing production line of waste gas waste heat utilization rate, including rotary kiln, dore furnace, kiln tail fan, raw materials vertical mill and kiln tail dust collector, rotary kiln, dore furnace, kiln tail fan and raw materials vertical mill link to each other in proper order, and the top of raw materials vertical mill links to each other with kiln tail dust collector, still includes the economizer, the economizer is established on the bypass of kiln tail fan and raw materials vertical mill interface channel, and the export of economizer links to each other with kiln tail dust collector.
And the system further comprises a waste heat power generation boiler, wherein the waste heat power generation boiler is arranged on a bypass of the decomposing furnace and the kiln tail fan connecting channel.
The kiln tail fan is a kiln tail high-temperature fan.
The bottom of the raw material vertical mill is provided with an air inlet, a cyclone dust collector and a raw material mill circulating fan are sequentially arranged between an outlet at the top of the raw material vertical mill and the air inlet arranged at the bottom of the raw material vertical mill, and the rear part of the raw material mill circulating fan is connected with a kiln tail dust collector through a branch.
And a kiln tail exhaust fan is arranged behind the kiln tail dust collector.
The temperature range of the waste gas at the outlet of the economizer is 110-150 ℃.
Compared with the prior art, the utility model, have following advantage:
the cement clinker firing production line for improving the waste gas waste heat utilization rate is reasonable in design, and by additionally arranging the bypass economizer, when a raw material powder grinding process system does not need a heat source, the waste heat of the 180-plus-200-DEG waste gas after the waste heat power generation kiln tail boiler is matched with the clinker production line is further recovered, so that the heat recovery utilization rate of the whole production line is improved.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is a schematic view of the production line of the present invention.
In the figure:
1. the rotary kiln comprises a rotary kiln, a decomposing furnace 2, a preheater 3, a kiln tail high-temperature fan 4, a waste heat power generation boiler 5, an economizer 6, a kiln tail dust collector 7, a humidifying tower 8, a raw material mill circulating fan 9, a cyclone dust collector 10 and a raw material vertical mill 11.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
As shown in fig. 1, the cement clinker firing production line for improving the waste gas and waste heat utilization rate comprises a rotary kiln 1, a decomposing furnace 2, a kiln tail fan, a raw material vertical mill 11, a kiln tail dust collector 7, a waste heat power generation boiler 5 and an economizer 6.
The rotary kiln, the decomposing furnace, the kiln tail fan and the raw material vertical mill are sequentially connected, the top of the raw material vertical mill is connected with a kiln tail dust collector, the coal economizer is arranged on a bypass of a connecting channel of the kiln tail fan and the raw material vertical mill, and an outlet of the coal economizer is connected with the kiln tail dust collector.
The waste heat power generation boiler 5 is arranged on a bypass of a connecting channel between the decomposing furnace and the kiln tail fan; specifically, the top of the decomposing furnace is provided with a preheater 3, the preheater is a cyclone preheater, the cyclone preheater is communicated with a kiln tail fan, a waste heat power generation boiler is arranged on a bypass of a channel communicated with the kiln tail fan, the inlet of the waste heat power generation boiler is connected with the rear of the preheater through a branch, and the outlet of the waste heat power generation boiler is connected with the front of the kiln tail fan through another branch. Further, the kiln tail fan is a kiln tail high-temperature fan 4.
An air inlet is formed in the bottom of the raw material vertical mill, a cyclone dust collector 10 and a raw material mill circulating fan 9 are sequentially arranged between an outlet in the top of the raw material vertical mill and the air inlet formed in the bottom of the raw material vertical mill, and the rear of the raw material mill circulating fan is connected with a kiln tail dust collector through a branch.
And a kiln tail exhaust fan is arranged behind the kiln tail dust collector 7, and an exhaust chimney is arranged behind the kiln tail exhaust fan. The front part of the kiln tail dust collector is provided with a humidifying tower 8, and an outlet channel of the humidifying tower is communicated with the kiln tail dust collector after being converged with an outlet channel of the economizer.
The invention has reasonable design, and when the raw material grinding system does not operate or the raw material grinding system with low water content does not need a drying heat source, the waste gas at the temperature of 180-plus-200 ℃ at the kiln tail is reduced to 150-plus-110 ℃ by the bypass economizer and then is sent into the raw material mill or the kiln tail dust collector, thereby improving the heat recovery and utilization efficiency of the whole production line.
The above-mentioned is only for the description of the preferred embodiments of the present invention, and the above-mentioned technical features can be combined at will to form a plurality of embodiments of the present invention.
The present invention has been described in detail with reference to the accompanying drawings, and it is apparent that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.

Claims (6)

1. The utility model provides an improve waste gas waste heat utilization rate's cement clinker firing production line, includes rotary kiln, dore furnace, kiln tail fan, the vertical mill of raw materials and kiln tail dust collector, rotary kiln, dore furnace, kiln tail fan and the vertical mill of raw materials link to each other in proper order, and the top of the vertical mill of raw materials links to each other its characterized in that with kiln tail dust collector: the coal economizer is arranged on a bypass of a connecting channel between the kiln tail fan and the raw material vertical mill, and an outlet of the coal economizer is connected with a kiln tail dust collector.
2. The cement clinker firing production line for improving the utilization rate of the waste heat of the exhaust gas as set forth in claim 1, wherein: the waste heat power generation boiler is arranged on a bypass of the decomposing furnace and the kiln tail fan connecting channel.
3. The cement clinker firing production line for improving the utilization rate of the waste heat of the exhaust gas as set forth in claim 1, wherein: the kiln tail fan is a kiln tail high-temperature fan.
4. The cement clinker firing production line for improving the utilization rate of the waste heat of the exhaust gas as set forth in claim 1, wherein: the bottom of the raw material vertical mill is provided with an air inlet, a cyclone dust collector and a raw material mill circulating fan are sequentially arranged between an outlet at the top of the raw material vertical mill and the air inlet arranged at the bottom of the raw material vertical mill, and the rear part of the raw material mill circulating fan is connected with a kiln tail dust collector through a branch.
5. The cement clinker firing production line for improving the utilization rate of the waste heat of the exhaust gas as set forth in claim 1, wherein: and a kiln tail exhaust fan is arranged behind the kiln tail dust collector.
6. The cement clinker firing production line for improving the utilization rate of the waste heat of the exhaust gas as set forth in claim 1, wherein: the temperature range of the waste gas at the outlet of the economizer is 110-150 ℃.
CN202021017256.0U 2020-06-05 2020-06-05 Cement clinker firing production line capable of improving waste gas waste heat utilization rate Active CN212610308U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021017256.0U CN212610308U (en) 2020-06-05 2020-06-05 Cement clinker firing production line capable of improving waste gas waste heat utilization rate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021017256.0U CN212610308U (en) 2020-06-05 2020-06-05 Cement clinker firing production line capable of improving waste gas waste heat utilization rate

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Publication Number Publication Date
CN212610308U true CN212610308U (en) 2021-02-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112679121A (en) * 2020-12-28 2021-04-20 安徽海螺集团有限责任公司 Cement clinker production line with low emission and low energy consumption

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112679121A (en) * 2020-12-28 2021-04-20 安徽海螺集团有限责任公司 Cement clinker production line with low emission and low energy consumption

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