CN-119553023-B - Control system, control method, equipment and storage medium for baking furnace of hot blast stove

CN119553023BCN 119553023 BCN119553023 BCN 119553023BCN-119553023-B

Abstract

The invention discloses a hot blast stove baking control system, a control method, equipment and a storage medium. The hot blast stove baking control system comprises at least one hot blast stove which is communicated with a blast furnace and is used for providing heat energy for the blast furnace, a pressure detection module and a temperature detection module are arranged in the hot blast stove and are used for detecting the pressure and the temperature in the hot blast stove, a flue main pipe is communicated with the hot blast stove, a flue valve is arranged on the flue main pipe, waste gas in the hot blast stove is discharged when the flue valve is opened, a bypass valve is communicated between an input end and an output end of a waste heat recovery module through a bypass pipeline, a quick-opening valve is arranged on the flue main pipe, an input end of a flue induced draft fan is communicated with an output end of the waste heat recovery module, an output end of the flue induced draft fan is communicated with a chimney and is used for leading out waste gas in the hot blast stove, and a control module is used for adjusting the opening of the flue valve, the bypass valve and the quick-opening valve and the frequency of the flue induced draft fan according to the pressure and the temperature, and further adjusting the negative pressure value in the hot blast stove. The invention improves the negative pressure adjusting effect of the hot blast stove.

Inventors

YANG GUOXIN
HU FANGJIAN
XIE WEIGUO
ZHU WENJIE
XUE LIZHOU
HUA HUANG
ZOU SHAOWEN
Duan Sanyuan
Shu Xiuhai
WANG ZHIKANG
BAI DECHUN
PAN WEIEN
DENG HUI
WEN YUANQUAN
CHENG CHUNHUA
LUO XINGGUO

Assignees

广东中南钢铁股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241125

Claims (9)

1. A stove control system for a stove, comprising: the hot blast furnace is communicated with the blast furnace and used for providing heat energy for the blast furnace, and a pressure detection module and a temperature detection module are arranged in the hot blast furnace and are respectively used for detecting the pressure and the temperature in the hot blast furnace; the flue header pipe is communicated with the hot blast stove, and a flue valve is arranged on the flue header pipe, and is used for discharging waste gas in the hot blast stove when the flue valve is opened; The waste heat recovery module is characterized in that the input end of the waste heat recovery module is communicated with the flue header pipe, the input end of the waste heat recovery module is communicated with the output end of the waste heat recovery module through a bypass pipeline, and a bypass valve is arranged on the bypass pipeline; The quick-opening valve is arranged on the flue header pipe, the input end of the quick-opening valve is communicated with the output end of the waste heat recovery module, and the output end of the quick-opening valve is communicated with the chimney; The input end of the smoke induced draft fan is communicated with the output end of the waste heat recovery module, and the output end of the smoke induced draft fan is communicated with the chimney; The flue gas induced draft fan is used for leading out the waste gas in the hot blast stove when the waste heat recovery module and/or the bypass valve are/is conducted; the control module is used for adjusting the opening degrees of the flue valve, the bypass valve and the quick-opening valve and the frequency of the smoke induced draft fan according to the pressure and the temperature, so as to adjust the negative pressure value in the hot blast stove; The control module is used for adjusting the flue valve to be in a range of a first opening degree when the pressure in the hot blast stove is larger than a range of a first negative pressure threshold value, adjusting the quick opening valve to be in a second opening degree and completely opening the bypass valve; After the hot blast stove is ignited, continuously reducing a negative pressure threshold along with the continuous increase of the temperature in the hot blast stove, and adjusting the frequency of the flue valve, the bypass valve and the quick-opening valve opening and the smoke induced draft fan to discharge smoke in the hot blast stove so as to maintain the pressure in the hot blast stove within the range of the set negative pressure threshold; The hot blast stove further comprises a plurality of gas branch pipes which are communicated with the hot blast stove, wherein gas shut-off valves are arranged on the gas branch pipes and are used for shutting off or switching on gas supply in the hot blast stove.
2. The hot-blast stove baking control system according to claim 1, further comprising a flue gas purifying module, wherein the input end of the flue gas purifying module is communicated with the output end of the waste heat recovery module, the output end of the flue gas purifying module is communicated with the input end of the flue gas induced draft fan, and the output end of the flue gas induced draft fan is communicated with the chimney.
3. A control method of a stove dryer, characterized by being applied to a stove dryer control system according to any one of claims 1-2, the method comprising: s110, cutting off the gas supply in the hot blast stove before the ignition of the baking furnace; s120, when the pressure in the hot blast stove is larger than the range of the first negative pressure threshold value, adjusting the flue valve to be in the range of the first opening degree, adjusting the quick opening valve to be in the second opening degree, and completely opening the bypass valve; S130, controlling the smoke induced draft fan to operate at a first frequency, so that the pressure in the hot blast stove is maintained within the range of the first negative pressure threshold.
4. A control method of a stove according to claim 3, characterized in that after step S130, when the stove is in the process of firing the stove and the temperature in the stove is below a first preset temperature, it further comprises: s210, connecting gas supply in the hot blast stove; s220, when the pressure in the hot blast stove is larger than the range of the second negative pressure threshold value and the temperature in the hot blast stove is smaller than the first preset temperature, controlling the bypass valve to be closed, adjusting the flue valve to be in the range of the first opening degree, and adjusting the quick opening valve to be in the range of a third opening degree, wherein the range of the third opening degree is integrally smaller than the second opening degree; S230, controlling the flue gas induced draft fan to operate at a first frequency, so that the pressure in the hot blast stove is maintained within the range of the second negative pressure threshold, wherein the range of the second negative pressure threshold is integrally smaller than the range of the first negative pressure threshold.
5. The method according to claim 4, wherein after step S130 or step S230, when the stove is in the firing process of the stove and the temperature in the stove is higher than a first preset temperature and lower than a second preset temperature, further comprising: s310, increasing the gas supply in the hot blast stove; S320, when the temperature in the hot blast stove is increased to be higher than the first preset temperature and lower than the second preset temperature, the quick-opening valve is adjusted to be a fourth opening degree, wherein the whole range of the fourth opening degree is smaller than the range of the third opening degree; And S330, controlling the flue gas induced draft fan to continue to operate at the first frequency, so that the pressure in the hot blast stove is maintained within a range of a third negative pressure threshold, wherein the minimum value of the range of the third negative pressure threshold is smaller than the minimum value of the range of the second negative pressure threshold, and the maximum value of the range of the third negative pressure threshold is smaller than the maximum value of the range of the second negative pressure threshold.
6. The method according to claim 5, wherein after step S130, step S230 or step S330, when the stove is in the firing process of the stove and the temperature in the stove is higher than a second preset temperature, further comprising: s410, continuing to increase the gas supply in the hot blast stove; S420, when the temperature in the hot blast stove is increased to be higher than the second preset temperature, adjusting the flue valve to be a fifth opening, wherein the range of the fifth opening is integrally larger than the range of the first opening; S430, controlling the smoke induced draft fan to operate at a second frequency, so that the pressure in the hot blast stove is maintained within a range of a fourth negative pressure threshold, wherein the range of the fourth negative pressure threshold is integrally smaller than the range of the third negative pressure threshold, and the range of the second frequency is integrally larger than the range of the first frequency.
7. The method according to claim 6, wherein after step S430, when the stove is finished, further comprising: S510, adjusting the flue valve to a sixth opening degree, and adjusting the quick-opening valve to a fourth opening degree, wherein the whole range of the sixth opening degree is smaller than the range of the fifth opening degree; s520, controlling the flue gas induced draft fan to operate at the first frequency, so that the pressure in the hot blast stove is maintained within a range of a fifth negative pressure threshold, wherein the range of the fifth negative pressure threshold is integrally larger than the range of the fourth negative pressure threshold.
8. An electronic device, the electronic device comprising: At least one control module, and A memory communicatively coupled to the at least one control module, wherein, The memory stores a computer program executable by the at least one control module to enable the at least one control module to perform the method of controlling a stove according to any one of claims 3-7.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions for causing a control module to execute the control method of a stove according to any one of claims 3-7.

Description

Control system, control method, equipment and storage medium for baking furnace of hot blast stove Technical Field The invention relates to the technical field of hot blast stove processes, in particular to a hot blast stove baking control system, a control method, equipment and a storage medium. Background In the baking process of the hot blast stove, when the blast furnace is stopped for a long time, the temperature of the chimney is low, the height difference between the position of a baking burner of the hot blast stove and the top of the chimney is small, so that positive pressure is generated in the baking process of the hot blast stove, and baking gas fire does not smoothly enter a heat storage chamber of the hot blast stove but is blown out, so that equipment in the baking burner area of the hot blast stove is burnt out, the baking cannot be normally performed, the baking and the blast furnace production process are delayed, and even personal injury is caused. Disclosure of Invention The invention provides a control system, a control method, equipment and a storage medium for a hot blast stove baking furnace, which are used for improving the negative pressure adjusting effect of the hot blast stove. According to an aspect of the present invention, there is provided a stove control system comprising: the hot blast furnace is communicated with the blast furnace and used for providing heat energy for the blast furnace, and a pressure detection module and a temperature detection module are arranged in the hot blast furnace and are respectively used for detecting the pressure and the temperature in the hot blast furnace; the flue header pipe is communicated with the hot blast stove, and a flue valve is arranged on the flue header pipe, and is used for discharging waste gas in the hot blast stove when the flue valve is opened; The waste heat recovery module is characterized in that the input end of the waste heat recovery module is communicated with the flue header pipe, the input end of the waste heat recovery module is communicated with the output end of the waste heat recovery module through a bypass pipeline, and a bypass valve is arranged on the bypass pipeline; The quick-opening valve is arranged on the flue header pipe, the input end of the quick-opening valve is communicated with the output end of the waste heat recovery module, and the output end of the quick-opening valve is communicated with the chimney; The input end of the smoke induced draft fan is communicated with the output end of the waste heat recovery module, and the output end of the smoke induced draft fan is communicated with the chimney; The flue gas induced draft fan is used for leading out the waste gas in the hot blast stove when the waste heat recovery module and/or the bypass valve are/is conducted; The control module is connected with the pressure detection module, the temperature detection module, the flue valve, the waste heat recovery module, the bypass valve, the quick-opening valve and the smoke induced draft fan, and is used for adjusting the opening degrees of the flue valve, the bypass valve and the quick-opening valve and the frequency of the smoke induced draft fan according to the pressure and the temperature, so as to further adjust the negative pressure value in the hot blast stove. Optionally, the hot blast stove baking control system further comprises a flue gas purification module, wherein the input end of the flue gas purification module is communicated with the output end of the waste heat recovery module, the output end of the flue gas purification module is communicated with the input end of the flue gas induced draft fan, and the output end of the flue gas induced draft fan is communicated with the chimney. Optionally, the hot blast stove baking control system further comprises a plurality of gas branch pipes communicated with the hot blast stove, wherein the gas branch pipes are provided with gas shut-off valves for shutting off or switching on gas supply in the hot blast stove. According to another aspect of the invention, there is provided a control method of a stove dryer, applied to a stove dryer control system according to any embodiment of the invention, the method comprising: Cutting off the gas supply in the hot blast stove; when the pressure in the hot blast stove is larger than the range of the first negative pressure threshold value, the flue valve is adjusted to be in the range of the first opening degree, the quick opening valve is adjusted to be in the second opening degree, and the bypass valve is completely opened; and controlling the smoke induced draft fan to operate at a first frequency, so that the pressure in the hot blast stove is maintained within the range of the first negative pressure threshold. Optionally, the control method of the hot blast stove baking furnace further comprises the following steps: the gas supply in the hot blast stove is connected; When the pressure in the h