CN114437744A - Control method for reducing coal gas consumption in long coking time of coke oven - Google Patents
Control method for reducing coal gas consumption in long coking time of coke oven Download PDFInfo
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- CN114437744A CN114437744A CN202210121670.3A CN202210121670A CN114437744A CN 114437744 A CN114437744 A CN 114437744A CN 202210121670 A CN202210121670 A CN 202210121670A CN 114437744 A CN114437744 A CN 114437744A
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- 239000000571 coke Substances 0.000 title claims abstract description 85
- 238000004939 coking Methods 0.000 title claims abstract description 42
- 239000003034 coal gas Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 claims abstract description 46
- 238000003763 carbonization Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000033764 rhythmic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
- C10B41/02—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke for discharging coke
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- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
The invention discloses a control method for reducing coal gas consumption of a coke oven in long coking time, belonging to the technical field of coke oven energy conservation, which is characterized in that temperature control coal gas saving operation is carried out 4 hours before a coking chamber needing temperature control is pushed to reduce the heat supply load of the coking chamber; at least comprises the following steps: s1, reducing the coal gas supply rate of the combustion chamber corresponding to the carbonization chamber to half of that of the initial state, reducing the coal gas supply rate of the adjacent combustion chamber to 1/3 of the initial state, and keeping for 2 hours; s2, recovering the coal gas supply rate of the combustion chambers corresponding to the carbonization chambers to the initial state, recovering the coal gas supply rate of the adjacent combustion chambers to the initial state, and heating for 2 hours; and S3, performing coke discharging operation on the carbonization chamber, and finishing the operation of one furnace number. The invention can effectively reduce the gas consumption in the coking final stage of the coke oven on the premise of not influencing the coke quality, and has remarkable energy-saving benefit.
Description
Technical Field
The invention belongs to the technical field of energy conservation of coke ovens, and particularly relates to a control method for reducing coal gas consumption of a coke oven in long coking time.
Background
When the coking time of the large coke oven is more than 22 hours, the production state with low load is called the production in the state of prolonging the coking time. The coke oven is basically in a furnace-stuffy state under long coking time, coke cakes are completely mature within hours before coke pushing, heat is basically not absorbed or little heat is absorbed, and at the moment, a large amount of coal gas is wasted by continuously supplying heat, and the phenomenon of coke over fire is easily caused. Therefore, how to safely and effectively reduce the gas consumption and save energy under the condition of long coking time of the coke oven is a problem which is focused on by coke oven production practitioners.
Disclosure of Invention
The invention provides a control method for reducing gas consumption of a coke oven in long coking time, which can effectively reduce the gas consumption in the last coking stage of the coke oven on the premise of not influencing the coke quality and has obvious energy-saving benefit.
The invention aims to provide a control method for reducing coal gas consumption of a coke oven in long coking time, which starts to carry out temperature control coal gas saving operation 4 hours before a coking chamber needing temperature control is pushed to coke, and reduces the heat supply of the coking chamber; at least comprises the following steps:
s1, reducing the coal gas supply rate of the combustion chamber corresponding to the carbonization chamber to half of that of the combustion chamber in the initial state, reducing the coal gas supply rate of the adjacent combustion chamber to 1/3 of that of the combustion chamber in the initial state, and keeping for 2 hours;
s2, recovering the coal gas supply rate of the combustion chambers corresponding to the carbonization chambers to the initial state, recovering the coal gas supply rate of the adjacent combustion chambers to the initial state, and heating for 2 hours;
and S3, performing coke discharging operation on the carbonization chamber, and finishing the operation of one furnace number.
Preferably, the control method is performed in groups, 6 furnace numbers are used as one group, one group is operated each time, when the previous group of furnace numbers is opened, the next group of furnace numbers is closed simultaneously, and the frequency of entering the basement of the coke oven by personnel is reduced.
Preferably, the coke oven is under long coking time, and the coking time of the coke oven is more than 25 hours.
Preferably, the furnace end temperature of the coke oven is monitored independently, and is not lower than 1100 ℃; and the side furnace is independently controlled, so that the regulation and control amplitude is reduced or no regulation and control is carried out.
Preferably, the number of the groups of the control method is ten.
Preferably, the gas feed rate is accomplished by means of a regulating cock.
The invention has the advantages and positive effects that:
the invention does not need to add any new process equipment, the operation method is simple, 1-2 people can operate the furnace, 6 furnace numbers are taken as a group, the influence on the furnace temperature is less, and the labor efficiency is higher; the phenomenon of coke over-fire can be improved without influencing the coke maturation; the energy-saving effect is remarkable, the heating is continuously controlled at the last stage of coking under the coking time of 32 hours, and the coal gas consumption can be saved by 90-100m for each furnace number in one turnover3The adaptability to production is strong, and the production can be stopped or adjusted at any time.
Drawings
Fig. 1 is a block diagram of a preferred embodiment of the present invention.
Wherein: 1. 6# combustion chamber; 2. 7# combustion chamber; 3. 6# carbonization chamber.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1, the technical solution of the present invention is:
a control method for reducing coal gas consumption of a coke oven in long coking time is based on a coke oven designed by medium-smelting coke resistant engineering technology limited company, and the model of the coke oven is JN 60-6; the temperature control coal gas saving operation is carried out 4 hours before the coke is pushed by the carbonization chamber with the temperature control, the heat supply of the carbonization chamber is reduced, and the specific operation method comprises the following steps: closing 1/2 the gas adjusting cock of the combustion chamber corresponding to the carbonization chamber, closing 1/3 the gas adjusting cock of the adjacent combustion chamber for 2 hours, opening the cock after 2 hours, recovering heating for 2 hours, and then performing coke discharging operation on the carbonization chamber to finish a furnace number operation.
The operation can be performed in groups, 6 furnace numbers are taken as one group, one group is operated during each operation, when the previous group of furnace numbers is opened, the next group of furnace numbers can be closed at the same time, and the frequency of entering the basement of the coke oven by personnel is reduced.
The coke oven is in long coking time, the coking time of the coke oven must be more than 25 hours, the longer the coking time of the coke oven is, the longer the temperature control time can be properly prolonged, and the adjustment amplitude of the adjusting cock can be increased.
The temperature of the coke oven end is independently monitored, and is required to be not lower than 1100 ℃; the side furnaces (1# and 61# combustion chambers) are independently controlled, and the regulation and control amplitude is reduced or is not regulated and controlled; when the production rhythm changes, the operation can be stopped at any time or flexibly adjusted according to the actual production condition.
To better explain the invention, firstly, a coke oven gas heating process and a production operation process are introduced:
the coke oven gas heating process comprises the following steps: coke oven gas → main coke oven gas pipe → branch coke oven gas pipe → adjusting cock → orifice plate box → exchange cock → horizontal row pipe → lower spray pipe → brick gas channel → vertical flame path entering the combustion chamber to mix with air for combustion, and supply heat to the carbonization chamber.
The heat supply mode of the carbonization chamber is as follows: the two combustion chambers supply heat to the carbonization chamber simultaneously, for example, the No. 3 carbonization chamber supplies heat to the No. 3 combustion chamber and the No. 4 combustion chamber simultaneously, and the No. 4 carbonization chamber supplies heat to the No. 4 combustion chamber and the No. 5 combustion chamber simultaneously.
The production operation process of the coke oven comprises the following steps: after the coke in the coke oven carbonization chamber is heated and matured, the coke is pushed out by a coke pushing rod of a coke pusher, and the coke pushing process is 5-2 series, which comprises the following steps:
1-6 signature number: 1. 6, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56
3-8 signature number: 3. 8, 13, 18, 23, 28, 33, 38, 43, 48, 53, 58
5-0 signature number: 5. 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60
2-7 signature number: 2. 7, 12, 17, 22, 27, 32, 37, 42, 47, 52, 57
4-9 signature number: 4. 9, 14, 19, 24, 29, 34, 39, 44, 49, 54, 59
When pushing the coke, pushing the coke according to a 5-2 series sequence, for example: after finishing pushing 1#, pushing 6#, then sequentially carrying out 11#, 16# … … 56#, then starting 3-8 sign numbers, 5-0 sign numbers, 2-7 sign numbers and 4-9 sign numbers, and circularly carrying out.
The invention realizes the coal gas saving under the long coking time by the following steps:
taking a 6# carbonization chamber as an example, the heating system is as follows: the coking time of the coke oven is 32 hours, the standard temperature machine side is 1205 ℃, the coke side is 1230 ℃, the coke oven is heated by adopting coke oven gas, and the gas pressure after adjusting a valve is 1150 Pa. The temperature control coal gas saving operation is carried out 4 hours before the coke is pushed in the 6# carbonization chamber, the heat supply of the carbonization chamber is reduced, and the specific operation method comprises the following steps: 1/2 is closed to the 6# combustion chamber adjusting cock, 1/3 is closed to the adjacent 7# combustion chamber adjusting cock, the closing time is 2 hours, the cock is opened after 2 hours, the heating is recovered for 2 hours, then the coking chamber is subjected to coke discharging operation, the coke maturation condition can not be influenced by the operation because the coke is matured 4 hours before coke pushing, the heating is recovered for 2 hours after the temperature is controlled for 2 hours, and the temperature of the next turnover cannot be influenced.
In order to facilitate thermal management and reduce labor intensity, the heating furnace numbers are controlled to be grouped, 6 furnace numbers are used as one group, one group is operated each time, when the last group of furnace numbers is opened, the next group of furnace numbers can be closed simultaneously, and the frequency of entering the basement of the coke oven by personnel is reduced. For example: the carbonization chambers 1, 6, 11, 16, 21 and 26 are organized into one group, the carbonization chambers 31, 36, 41, 46, 51 and 56 are organized into two groups, the carbonization chambers 3, 8, 13, 18, 23 and 28 are organized into three groups, and the rest is analogized to be organized into four groups and five groups … …. When the temperature is controlled, the combustion chambers corresponding to a group of carbonization chambers are operated, the combustion chamber adjusting cocks 1, 6, 11, 16, 21 and 26 are closed 1/2, the combustion chamber adjusting cocks adjacent to the numbers 2, 7, 12, 17, 22 and 27 are closed 1/3, after the temperature is controlled for 2 hours, the combustion chamber adjusting cocks 1, 6, 11, 16, 21 and 26 are opened, the combustion chamber adjusting cocks adjacent to the numbers 2, 7, 12, 17, 22 and 27 are opened, and then the combustion chamber adjusting cocks corresponding to the groups of carbonization chambers 31, 36, 41, 46, 51 and 56 are closed 1/2, 32, 37, 42, 47, 52 and 57 are closed 1/3. Then three groups, four groups and five groups … … are operated according to the method in sequence and are circulated.
In the above technical solution, the conditions under which such an operation can be performed are: the coking time of the coke oven is required to be more than 25 hours under the condition that the coke oven is in the long coking time, the longer the coking time of the coke oven is, the longer the temperature control time can be properly prolonged, and the adjustment amplitude of the adjusting cock can be increased.
In the technical scheme, the furnace temperature monitoring is enhanced during the operation, so that the abnormity of individual furnace numbers is avoided; the furnace end temperature is monitored independently and is required to be not lower than 1100 ℃.
In the technical scheme, the side furnaces (1# and 61# combustion chambers) are independently controlled, the regulation and control amplitude is reduced or not regulated, and the large temperature fluctuation is avoided.
In the technical scheme, when the production rhythm is changed, the operation can be stopped at any time or flexibly adjusted according to the actual production condition.
Referring to fig. 1, taking the # 6 coking chamber as an example, the # 6 combustion chamber 1 and the # 7 combustion chamber 2 supply heat to the # 6 coking chamber 3 together. The coke oven heating system during heating control is as follows: the coking time of the coke oven is 32 hours, the standard temperature machine side is 1205 ℃, the coke side is 1230 ℃, the coke oven is heated by adopting coke oven gas, and the gas pressure after adjusting a valve is 1150 Pa.
The temperature control coal gas saving operation is carried out 4 hours before the coke is pushed in the 6# carbonization chamber, the heat supply of the carbonization chamber is reduced, and the specific operation method comprises the following steps: closing 1/2 the 6# combustion chamber adjusting cock, closing 1/3 the adjacent 7# combustion chamber adjusting cock, wherein the closing time is 2 hours, opening the cock after 2 hours, recovering the heating for 2 hours, and then performing coke discharging operation on the carbonization chamber to finish the temperature control operation of one furnace number.
Referring to table 1, in order to facilitate thermal management and reduce labor intensity, the heating furnace numbers are controlled to be grouped, 6 furnace numbers are used as one group, one group is operated each time, when the previous group of furnace numbers is opened, the next group of furnace numbers can be closed at the same time, and the frequency of entering the basement of the coke oven by personnel is reduced.
TABLE 1 control heating marshalling table
| First group | Second group | Third group | Fourth group | Fifth group | Sixth group | Seventh group | Eighth group | Ninth group | Tenth group |
| 1 | 31 | 3 | 33 | 5 | 35 | 2 | 32 | 4 | 34 |
| 6 | 36 | 8 | 38 | 10 | 40 | 7 | 37 | 9 | 39 |
| 11 | 41 | 13 | 43 | 15 | 45 | 12 | 42 | 14 | 44 |
| 16 | 46 | 18 | 48 | 20 | 50 | 17 | 47 | 19 | 49 |
| 21 | 51 | 23 | 53 | 25 | 55 | 22 | 52 | 24 | 54 |
| 26 | 56 | 28 | 58 | 30 | 60 | 27 | 57 | 29 | 59 |
For example, table 1: the carbonization chambers 1, 6, 11, 16, 21 and 26 are organized into one group, the carbonization chambers 31, 36, 41, 46, 51 and 56 are organized into two groups, the carbonization chambers 3, 8, 13, 18, 23 and 28 are organized into three groups, and the rest is analogized to the same, so four groups and five groups … … are organized. When the temperature is controlled, the combustion chambers corresponding to a group of carbonization chambers are operated, the combustion chamber adjusting cocks 1, 6, 11, 16, 21 and 26 are closed 1/2, the combustion chamber adjusting cocks adjacent to the numbers 2, 7, 12, 17, 22 and 27 are closed 1/3, after the temperature is controlled for 2 hours, the combustion chamber adjusting cocks 1, 6, 11, 16, 21 and 26 are opened, the combustion chamber adjusting cocks adjacent to the numbers 2, 7, 12, 17, 22 and 27 are opened, and then the combustion chamber adjusting cocks corresponding to the groups of carbonization chambers 31, 36, 41, 46, 51 and 56 are closed 1/2, 32, 37, 42, 47, 52 and 57 are closed 1/3. And then sequentially operating three groups, four groups and five groups … … ten groups according to the method, and circularly reciprocating.
When the operation is carried out, the temperature of the furnace end needs to be monitored independently, and is required to be not lower than 1100 ℃; the side furnaces (1# and 61# combustion chambers) are independently controlled, so that the regulation and control amplitude is reduced or no regulation and control is carried out, and the large temperature fluctuation is avoided; when the production rhythm changes, the operation can be stopped at any time or flexibly adjusted according to the actual production condition.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (6)
1. A control method for reducing coal gas consumption of a coke oven in long coking time is characterized in that temperature control coal gas saving operation is carried out 4 hours before a coking chamber needing temperature control is pushed to coke, and the heat supply amount of the coking chamber is reduced; at least comprises the following steps:
s1, reducing the coal gas supply rate of the combustion chamber corresponding to the carbonization chamber to half of that of the initial state, reducing the coal gas supply rate of the adjacent combustion chamber to 1/3 of the initial state, and keeping for 2 hours;
s2, recovering the coal gas supply rate of the combustion chambers corresponding to the carbonization chambers to the initial state, recovering the coal gas supply rate of the adjacent combustion chambers to the initial state, and heating for 2 hours;
and S3, performing coke discharging operation on the carbonization chamber, and finishing the operation of one furnace number.
2. The method for controlling the reduction of gas consumption in the long coking time of the coke oven according to claim 1, wherein the control method is performed in groups of 6 oven numbers, one group is operated each time, when the last group of oven numbers is opened, the closing of the next group of oven numbers is completed simultaneously, and the frequency of entering the basement of the coke oven by personnel is reduced.
3. The method for controlling the reduction of gas consumption in the long coking time of the coke oven according to claim 2, wherein the coke oven is in the long coking time, and the coking time of the coke oven is more than 25 hours.
4. The method for controlling the reduction of gas consumption in the long coking time of the coke oven according to claim 3, wherein the furnace end temperature of the coke oven is independently monitored, and is not lower than 1100 ℃; and the side furnace is independently controlled, so that the regulation and control amplitude is reduced or no regulation and control is carried out.
5. The method for controlling the reduction of gas consumption in the long coking time of the coke oven according to claim 4, wherein the number of the groups of the control method is ten.
6. The method of claim 5, wherein the gas supply rate is controlled by adjusting a cock.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210121670.3A CN114437744B (en) | 2022-02-09 | 2022-02-09 | Control method for reducing gas consumption of coke oven under long coking time |
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| CN202210121670.3A CN114437744B (en) | 2022-02-09 | 2022-02-09 | Control method for reducing gas consumption of coke oven under long coking time |
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| CN114437744B CN114437744B (en) | 2023-10-31 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07113087A (en) * | 1993-10-15 | 1995-05-02 | Nippon Steel Chem Co Ltd | Low-temperature discharge of coke from oven in coke production |
| JPH07118660A (en) * | 1993-10-20 | 1995-05-09 | Sumitomo Metal Ind Ltd | Method for programmed heating of coke oven |
| CN202465585U (en) * | 2012-03-01 | 2012-10-03 | 北京众联盛化工工程有限公司 | Tamping coke oven with combustors heated sectionally and regenerative chambers adjusted separately |
| CN107022359A (en) * | 2017-04-28 | 2017-08-08 | 河南中鸿集团煤化有限公司 | A kind of coke oven combustion chamber temperature control control nitre method and system |
| CN111139090A (en) * | 2019-12-27 | 2020-05-12 | 中冶焦耐(大连)工程技术有限公司 | Ultralow-load operation method of dry quenching system |
| CN214781634U (en) * | 2021-06-16 | 2021-11-19 | 中钢设备有限公司 | Coal gas adjusting device for coke oven heating system |
-
2022
- 2022-02-09 CN CN202210121670.3A patent/CN114437744B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07113087A (en) * | 1993-10-15 | 1995-05-02 | Nippon Steel Chem Co Ltd | Low-temperature discharge of coke from oven in coke production |
| JPH07118660A (en) * | 1993-10-20 | 1995-05-09 | Sumitomo Metal Ind Ltd | Method for programmed heating of coke oven |
| CN202465585U (en) * | 2012-03-01 | 2012-10-03 | 北京众联盛化工工程有限公司 | Tamping coke oven with combustors heated sectionally and regenerative chambers adjusted separately |
| CN107022359A (en) * | 2017-04-28 | 2017-08-08 | 河南中鸿集团煤化有限公司 | A kind of coke oven combustion chamber temperature control control nitre method and system |
| CN111139090A (en) * | 2019-12-27 | 2020-05-12 | 中冶焦耐(大连)工程技术有限公司 | Ultralow-load operation method of dry quenching system |
| CN214781634U (en) * | 2021-06-16 | 2021-11-19 | 中钢设备有限公司 | Coal gas adjusting device for coke oven heating system |
Non-Patent Citations (1)
| Title |
|---|
| 白小明等: "焦炉长结焦时间状态下的管理与维护", 《燃料与化工》 * |
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