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CN-115678576-B - Positive pressure oven drying process of coke oven

CN115678576BCN 115678576 BCN115678576 BCN 115678576BCN-115678576-B

Abstract

The invention discloses a positive pressure oven drying process of a coke oven, which comprises the following steps of installing positive pressure oven drying equipment on one side of the coke oven, and connecting a gas pipeline with a gas inlet pipe of the positive pressure oven drying equipment. According to the invention, the time of hot gas introduction is controlled to be 25 days and nights, the temperature of the hot gas introduction is 250 ℃ plus or minus 30 ℃, most of water in a masonry can be evaporated and quickly discharged through a chimney, rapid heating is avoided, when a coke oven is rapidly heated, the lining of the furnace body is damaged due to massive vaporization and expansion of water, then the time of hot gas introduction is controlled to be 20 days and nights, the temperature of the hot gas introduction is controlled to be 350 ℃ plus or minus 20 ℃, the time of hot gas introduction is controlled to be 23 days and nights, the temperature of the hot gas introduction is controlled to be 520 ℃ plus or minus 20 ℃, the time of hot gas introduction is controlled to be 14 days and nights, the temperature of the hot gas introduction is 600-900 ℃, the interior of the coke oven is gradually preheated, the damage of the coke oven caused by heat stress generated by rapid heating is avoided, the time of the coke oven is shortened, and the cost of the oven is reduced.

Inventors

  • LIAO YUQI
  • CHEN YOUZHI
  • LIU GUANGHUI
  • HOU MEI

Assignees

  • 贵州开阳青利天盟化工有限公司

Dates

Publication Date
20260508
Application Date
20221018

Claims (6)

  1. 1. A positive pressure oven baking process of a coke oven is characterized by comprising the following method steps: The method comprises the steps of installing positive pressure oven equipment on one side of a coke oven, connecting a gas pipeline with a gas inlet pipe of the positive pressure oven equipment, connecting a gas outlet and an air outlet of the positive pressure oven equipment with a burner, installing the burner in a carbonization chamber, and completing the installation of the oven pipeline and the equipment; step two, in a preheating period, controlling the temperature of continuously blowing hot air into the carbonization chamber by positive pressure baking furnace equipment to be 250 ℃ plus or minus 30 ℃ and preheating for 25 days and nights; Step three, initial temperature rise, namely controlling the temperature of continuously blowing hot air into the carbonization chamber by positive pressure furnace equipment to be 350 ℃ plus or minus 20 ℃ and initial temperature rise for 20 days and nights; step four, medium-stage heating, namely controlling the temperature of continuously blowing hot air into the carbonization chamber by positive pressure furnace equipment to be 520 ℃ plus or minus 20 ℃ and medium-stage heating to be 23 days and nights; And fifthly, heating in the later stage, and controlling the temperature of continuously blowing hot air into the carbonization chamber by positive pressure furnace equipment to be 600-900 ℃ and heating in the later stage for 14 days and nights.
  2. 2. The positive pressure oven process of claim 1, wherein the gas pipeline is in sealing connection with the gas inlet pipe of the positive pressure oven device through a flange.
  3. 3. The positive pressure oven drying process of claim 1, wherein in the preheating period in the second step, most of water in the brickwork can be evaporated at 250 ℃ plus or minus 30 ℃ and quickly discharged through a chimney, so that the rapid temperature rise is avoided, and the lining of the oven body is damaged due to large vaporization and expansion of water when the coke oven is rapidly heated.
  4. 4. The positive pressure oven drying process of claim 1, wherein the initial temperature rise, the middle temperature rise and the later temperature rise in the third, the fourth and the fifth steps gradually preheat the coke oven to avoid damage to the coke oven caused by thermal stress generated by rapid heating.
  5. 5. The positive pressure oven drying process according to claim 1, wherein the expansion ratio in the oven in the third step is 0.034% + -0.001%.
  6. 6. The positive pressure oven drying process according to claim 1, wherein the expansion ratio in the coke oven in the fourth step is 0.04%.

Description

Positive pressure oven drying process of coke oven Technical Field The invention relates to the technical field of positive pressure ovens, in particular to a coke oven positive pressure oven process. Background The oven is an operation process of heating the oven from normal temperature to temperature when the oven is switched to normal heating (or coal charging), and the process is very important and complex, and has a vital influence on the service life of the oven. The current oven baking method can be divided into a negative pressure oven and a positive pressure oven. The main driving force of air and waste gas after combustion in the negative pressure furnace is from the suction of chimney, and the main driving force of air and waste gas after combustion in the positive pressure furnace is from the fan. The positive pressure oven of the coke oven can ensure that the whole oven keeps positive pressure in the whole oven baking process, and the process is more scientific and is accepted by the market more and more. The prior positive pressure oven technology has the defects that the oven drying time is long, the normal use time of the coke oven is influenced, the oven drying cost is increased, meanwhile, the temperature is rapidly increased, and the rapid heating is easy to generate thermal stress to cause damage to the coke oven, so that the positive pressure oven technology for the coke oven is provided. Disclosure of Invention The invention aims to provide a positive pressure oven drying process of a coke oven, which solves the problems in the background technology. In order to achieve the purpose, the invention provides the following technical scheme that the positive pressure oven baking process of the coke oven comprises the following method steps: The method comprises the steps of installing positive pressure oven equipment on one side of a coke oven, connecting a gas pipeline with a gas inlet pipe of the positive pressure oven equipment, connecting a gas outlet and an air outlet of the positive pressure oven equipment with a burner, installing the burner in a carbonization chamber, and completing the installation of the oven pipeline and the equipment; step two, in a preheating period, controlling the temperature of continuously blowing hot air into the carbonization chamber by positive pressure baking furnace equipment to be 250 ℃ plus or minus 30 ℃ and preheating for 25 days and nights; Step three, initial temperature rise, namely controlling the temperature of continuously blowing hot air into the carbonization chamber by positive pressure furnace equipment to be 350 ℃ plus or minus 20 ℃ and initial temperature rise for 20 days and nights; step four, medium-stage heating, namely controlling the temperature of continuously blowing hot air into the carbonization chamber by positive pressure furnace equipment to be 520 ℃ plus or minus 20 ℃ and medium-stage heating to be 23 days and nights; And fifthly, heating in the later stage, and controlling the temperature of continuously blowing hot air into the carbonization chamber by positive pressure furnace equipment to be 600-900 ℃ and heating in the later stage for 14 days and nights. In a preferred embodiment of the present invention, the first gas pipeline is connected with the gas inlet pipe of the positive pressure baking furnace device in a sealing way through a flange. As a preferred implementation mode of the invention, in the preheating period in the second step, most of water in the masonry can be evaporated at the temperature of 250 ℃ plus or minus 30 ℃ and quickly discharged through a chimney, so that the problem that the lining of the furnace body is damaged due to large evaporation and expansion of water when the coke oven is rapidly heated is avoided. As a preferred embodiment of the invention, the initial temperature rise, the middle temperature rise and the later temperature rise in the third step, the fourth step and the fifth step are used for gradually preheating the interior of the focusing furnace, so that the damage to the interior of the focusing furnace caused by heat stress generated by rapid heating is avoided. In a preferred embodiment of the present invention, the expansion ratio in the coke oven in the third step is 0.034% ± 0.001%. As a preferred embodiment of the present invention, the expansion ratio in the coke oven in the fourth step is 0.04%. Compared with the prior art, the invention has the following beneficial effects: According to the invention, hot gas generated by the combustion of a combustor is continuously introduced into a carbonization chamber through positive pressure oven equipment, then the introduced time of the hot gas is controlled to be 25 days and nights, the introduced hot gas is controlled to be 250+/-30 ℃, so that most of water in a masonry can be evaporated and quickly discharged through a chimney, the rapid temperature rise is avoided, the furnace lining is damaged due to massive vaporization