CN110627385B - Method for prolonging cleaning period of Maerz lime kiln channel - Google Patents
Method for prolonging cleaning period of Maerz lime kiln channel Download PDFInfo
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- CN110627385B CN110627385B CN201910955420.8A CN201910955420A CN110627385B CN 110627385 B CN110627385 B CN 110627385B CN 201910955420 A CN201910955420 A CN 201910955420A CN 110627385 B CN110627385 B CN 110627385B
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- lime kiln
- cleaning
- kiln
- maerz
- annular channel
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
Abstract
The invention relates to the technical field of lime kiln channel cleaning, in particular to a method for prolonging the cleaning period of a Maerz lime kiln channel. The temperature, the discharging times and the excess air coefficient of the annular channel are controlled within the range, so that the cleaning period of the annular channel of the Mailz lime kiln can be prolonged from one cleaning in every 10 to 15 days to one cleaning in 60 to 80 days, namely the cleaning period of the annular channel of the lime kiln is prolonged; because the cleaning period of the annular channel is prolonged, the cleaning times are reduced and the labor capacity of personnel is greatly reduced in the same time; and the kiln stopping time is reduced, namely the working time of the lime kiln is increased, so that greater economic benefits can be created.
Description
Technical Field
The invention relates to the technical field of lime kiln channel cleaning, in particular to a method for prolonging the cleaning period of a Maerz lime kiln channel.
Background
At present, 5 Mailz lime kilns exist in Zhongtai calcium carbide plants, during normal production, the kilns need to be stopped every 10 to 15 days to clean the channels, and the personnel labor intensity is high and the danger coefficient is high when the channels are cleaned. Frequent cleaning of the channel becomes a key problem influencing the capacity operation of the Mailz lime kiln device.
Disclosure of Invention
The invention provides a method for prolonging the cleaning period of a Maerz lime kiln channel, overcomes the defects of the prior art, and can effectively solve the problem that the cleaning period of the Maerz lime kiln channel is short.
The technical scheme of the invention is realized by the following measures: a method for prolonging the cleaning period of a Maerz lime kiln channel is carried out according to the following method: the temperature of an annular channel of the Maerz lime kiln is controlled to be 850-950 ℃, the discharging times of a heat accumulation chamber of the Maerz lime kiln in each production period are 32-40 times, and the excess air coefficient of combustion air is 1.35-1.48.
The following is further optimization or/and improvement of the technical scheme of the invention:
the method for prolonging the cleaning period of the passage of the Maerz lime kiln is carried out according to the following method: the temperature of an annular channel of the Maerz lime kiln is controlled to be 850 ℃, the discharging times of a heat storage chamber of the Maerz lime kiln in each production period are 36 times, and the excess air coefficient of combustion air is 1.35.
The method for prolonging the cleaning period of the passage of the Maerz lime kiln is carried out according to the following method: the temperature of an annular channel of the Maerz lime kiln is controlled to be 870 ℃, the discharging times of a heat accumulation chamber of the Maerz lime kiln in each production period are 32 times, and the excess air coefficient of combustion air is 1.48.
The method for prolonging the cleaning period of the passage of the Maerz lime kiln is carried out according to the following method: the temperature of an annular channel of the Maerz lime kiln is controlled at 900 ℃, the discharging times of a heat storage chamber of the Maerz lime kiln in each production period are 40 times, and the excess air coefficient of combustion air is 1.42.
The method for prolonging the cleaning period of the passage of the Maerz lime kiln is carried out according to the following method: the temperature of the annular channel of the Maerz lime kiln is controlled to be 942 ℃, the discharging times of the heat storage chamber of the Maerz lime kiln in each production period are 34 times, and the excess air coefficient of combustion air is 1.44.
According to the invention, the temperature, the discharging times and the excess air coefficient of the annular channel are controlled within the range, so that the cleaning period of the annular channel of the Mailz lime kiln can be prolonged from one cleaning in every 10-15 days to one cleaning in 60-80 days, namely the cleaning period of the annular channel of the lime kiln is prolonged. Because the cleaning period of the annular channel is prolonged, the cleaning times are reduced and the labor capacity of personnel is greatly reduced in the same time; and the kiln stopping time is reduced, namely the working time of the lime kiln is increased, so that greater economic benefits can be created.
Drawings
FIG. 1 is a schematic diagram of the structure of a Maerz lime kiln.
The codes in the figures are respectively: 1 is a Maerz lime kiln, 2 is an annular channel, 3 is a heat storage chamber, and 4 is a production chamber.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemicals mentioned in the present invention are all well known and commonly used in the art, unless otherwise specified.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of fig. 1 of the specification.
The invention is further described below with reference to the following examples:
example 1: the method for prolonging the period of the cleaning channel of the Maerz lime kiln 1 is carried out according to the following method: the temperature of the annular channel 2 of the Maerz lime kiln 1 is controlled to be 850-950 ℃, the discharging times of the heat accumulation chamber 3 of the Maerz lime kiln 1 in each production period are 32-40 times, and the excess air coefficient of the combustion air is 1.35-1.48.
The invention can prolong the cleaning period of the annular channel 2 of the Mailz lime kiln 1 (which is called lime kiln for short in the follow-up) from once cleaning every 10 days to 15 days to once cleaning every 60 days to 80 days by controlling the temperature, the discharging times and the excess air coefficient of the annular channel 2 in the range, namely, the cleaning period of the annular channel 2 of the lime kiln is prolonged. Because the cleaning period of the annular channel 2 is prolonged, the cleaning times are reduced and the labor capacity of personnel is greatly reduced in the same time; and the kiln stopping time is reduced, namely the working time of the lime kiln is increased, so that greater economic benefits can be created.
When the method is adopted, on the premise that the required coal gas amount is not changed, in a production period, although the discharging (lime discharging) times of the heat storage chamber 3 of the Maerz lime kiln 1 is increased from the existing 20 times to 32 times to 40 times, the quality of lime is not influenced, the quantity of low-melting-point substances generated in the lime production process or carried in limestone raw materials and remained in the annular channel 2 can be obviously reduced, the materials or the low-melting-point substances remained in the annular channel 2 are not easy to coke and agglomerate in the annular channel 2 at 850 ℃ to 950 ℃, and the annular channel 2 is prevented from being blocked by the materials or the low-melting-point substances.
According to the invention, the air quantity of the combustion air is increased, and the excess air coefficient is increased from 1.2-1.25 to 1.35-1.48 in the prior art, so that the length of a calcining zone of the production chamber 4 in the lime kiln can be shortened, and when the material of the production chamber 4 in the lime kiln enters the heat storage chamber 3 through the annular channel 2, the material is in a qualified calcining stage, additional energy is not easily provided for the annular channel 2, and the coking and caking of the material in the annular channel 2 are further avoided.
The rest of the operation of the Maerz lime kiln 1 is carried out according to the conventional operation, for example, combustion air enters from the top of the shaft kiln corresponding to the production chamber 4, cooling air enters from the bottom of the heat accumulation chamber 3 and the production chamber 4 respectively, and waste gas is discharged from the top of the production chamber 4.
Raw materials (limestone) of various manufacturers are mixed according to quality analysis, and the uniformity of the limestone entering the kiln is ensured.
In the lime production process of our factory, 100 production periods are planned 24 hours a day, and the unloading times of each production period are 32-40 times. Discharging through the heat accumulation chamber 3, and discharging the produced lime in the lime kiln.
For example, it is calculated that each shutdown takes 8 hours: the kiln shutdown can be reduced by 18 times per year, the total time is 144 hours, and the hourly yield is as follows: and at 25t/h, 3600 tons of lime can be produced in each lime kiln all the year, 18000 tons of lime can be produced in five lime kilns, the profit can be realized by 180 ten thousand yuan all the year according to the calculation of 100 yuan of lime per ton, and the economic benefit is very considerable.
Example 2: the method for prolonging the period of the cleaning channel of the Maerz lime kiln 1 is carried out according to the following method: the temperature of the annular channel 2 of the Maerz lime kiln 1 is controlled at 850 ℃, the discharging times of the heat accumulation chamber 3 of the Maerz lime kiln 1 in each production period are 36 times, and the excess air coefficient of combustion air is 1.35.
The existing cleaning cycle is 1 time per 15 days, and 25 times per year.
In the lime production process, when the method described in this embodiment 2 is adopted, the cleaning cycle can be controlled to be 1 time in 70 days, and then cleaning is required 6 times in 1 year, which is calculated according to the requirement of 8 hours for each kiln shutdown: the kiln shutdown can be reduced by 19 times every year, the total time is 152 hours, and the hourly yield is as follows: 25t/h, 3800 tons of lime can be produced in each lime kiln all the year.
Example 3: the method for prolonging the period of the cleaning channel of the Maerz lime kiln 1 is carried out according to the following method: the temperature of the annular channel 2 of the Maerz lime kiln 1 is controlled to be 870 ℃, the discharging times of the heat accumulation chamber 3 of the Maerz lime kiln 1 in each production period are 32 times, and the excess air coefficient of combustion air is 1.48.
The existing cleaning cycle is 1 time per 15 days, and 25 times per year.
In the lime production process, when the method described in this embodiment 3 is adopted, the cleaning cycle can be controlled to be 1 time in 65 days, and then cleaning is required 6 times in 1 year, which is calculated according to the requirement of 8 hours for each kiln shutdown: the kiln shutdown can be reduced by 19 times every year, the total time is 152 hours, and the hourly yield is as follows: 25t/h, 3800 tons of lime can be produced in each lime kiln all the year.
Example 4: the method for prolonging the period of the cleaning channel of the Maerz lime kiln 1 is carried out according to the following method: the temperature of the annular channel 2 of the Maerz lime kiln 1 is controlled at 900 ℃, the discharging times of the heat accumulation chamber 3 of the Maerz lime kiln 1 in each production period are 40 times, and the excess air coefficient of combustion air is 1.42.
The existing cleaning cycle is 1 time per 15 days, and 25 times per year.
In the lime production process, when the method described in this embodiment 4 is adopted, the cleaning cycle can be controlled to be 1 time in 75 days, and then cleaning is required 5 times in 1 year, which is calculated according to the requirement of 8 hours for each kiln shutdown: the kiln shutdown can be reduced by 20 times every year, the total time is 160 hours, and the hourly yield is as follows: 25t/h, and 4000 tons of lime can be produced in each lime kiln all the year.
Example 5: the method for prolonging the period of the cleaning channel of the Maerz lime kiln 1 is carried out according to the following method: the temperature of the annular channel 2 of the Maerz lime kiln 1 is controlled at 942 ℃, the discharging times of the heat accumulation chamber 3 of the Maerz lime kiln 1 in each production period are 34 times, and the excess air coefficient of the combustion air is 1.44.
The existing cleaning cycle is 1 time per 15 days, and 25 times per year.
In the lime production process, when the method described in this embodiment 5 is adopted, the cleaning cycle can be controlled to be 1 time in 80 days, and then 5 times need to be cleaned in 1 year, which is calculated according to the fact that 8 hours are required for each kiln shutdown: the kiln shutdown can be reduced by 20 times every year, the total time is 160 hours, and the hourly yield is as follows: 25t/h, and 4000 tons of lime can be produced in each lime kiln all the year.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (1)
1. A method for prolonging the cleaning period of a Maerz lime kiln channel is characterized by comprising the following steps: the temperature of the annular channel of the Maerz lime kiln is controlled to be 942 ℃, the discharging times of the heat storage chamber of the Maerz lime kiln in each production period are 34 times, and the excess air coefficient of combustion air is 1.44.
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| CN201910955420.8A CN110627385B (en) | 2019-10-09 | 2019-10-09 | Method for prolonging cleaning period of Maerz lime kiln channel |
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| CN201910955420.8A CN110627385B (en) | 2019-10-09 | 2019-10-09 | Method for prolonging cleaning period of Maerz lime kiln channel |
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| CN110627385B true CN110627385B (en) | 2022-02-01 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003101906A1 (en) * | 2002-06-03 | 2003-12-11 | Duerasch Ulrich | Rotary flow method and device for the thermal treatment of bulk goods, preferably for calcinating carbonate-containing bulk goods |
| JP2011046554A (en) * | 2009-08-26 | 2011-03-10 | Oji Paper Co Ltd | Method for manufacturing acicular light calcium carbonate |
| CN106145719A (en) * | 2016-08-12 | 2016-11-23 | 鄂尔多斯市君正能源化工有限公司 | A kind of sleeve lime kiln ejector cleaning plant |
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- 2019-10-09 CN CN201910955420.8A patent/CN110627385B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003101906A1 (en) * | 2002-06-03 | 2003-12-11 | Duerasch Ulrich | Rotary flow method and device for the thermal treatment of bulk goods, preferably for calcinating carbonate-containing bulk goods |
| JP2011046554A (en) * | 2009-08-26 | 2011-03-10 | Oji Paper Co Ltd | Method for manufacturing acicular light calcium carbonate |
| CN106145719A (en) * | 2016-08-12 | 2016-11-23 | 鄂尔多斯市君正能源化工有限公司 | A kind of sleeve lime kiln ejector cleaning plant |
Non-Patent Citations (2)
| Title |
|---|
| "唐钢新建燃煤麦尔兹石灰窑工艺的优化";苗辛;《河北冶金》;20080121(第2期);第9-10页 * |
| "麦尔兹窑能耗因素分析与节能控制";何迎军，张永刚;《耐火与石灰》;20160630;第41卷(第3期);第26-30页 * |
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