The hot gas burner is a heating facility (such as a boiler, an industrial furnace, etc.) with hot gas as the heat source, and is a special device used to realize the hot gas combustion process. The main function is to introduce hot gas and combustion-supporting air into the heating facility or burner according to a certain proportion and certain mixing conditions, and meet the requirements of the heating process for the direction, shape, rigidity and spreading of the flame. The blast furnace gas burner is designed for the blast furnace tail gas produced by iron and steel enterprises. The blast furnace gas burner uses blast furnace tail gas of any pressure and any calorific value, and can realize automatic ignition and other functions.
Cause Analysis and Solution Ideas of Blast Furnace Gas Burner Blockage The workshop organization conducted an in-depth analysis of the cause of burner blockage. The main reasons are as follows:
(1) Impurities mainly come from blast furnace gas, which are transported to the boiler burner area together with blast furnace gas.
(2) When the blast furnace gas passes through the swirl blades, the airflow rotates and generates a radial velocity along the pipe, the airflow hits the swirl blades, and some impurities adhere to the swirl blades.
(3) The design of the swirl vane of the blast furnace gas burner is unreasonable, and the influence of fuel impurities is not fully considered. When the blast furnace gas passes through the swirl blades, the throttling is obvious, and the number of blades is too large, and the passage between the blades is too small, which intensifies the accumulation of impurities.
(4) The swirl blades are not resistant to corrosion, and blast furnace gas is acidic and corrosive. After the swirl blades are corroded, pits are formed, which intensifies the adhesion and accumulation of impurities.
(5) The swirl blade is close to the furnace, and the impurities are sintered at high temperature.
(6) The pressure of blast furnace gas is low, and it is difficult to blow off by the kinetic energy of the gas itself when impurities accumulate. The lower the pressure of blast furnace gas, the easier it is to accumulate impurities.
Solutions to reduce the blockage of blast furnace gas burners Aiming at the reasons for the blockage of blast furnace gas burners, we have summarized the following solutions:
(1) To reduce the blockage of the burner, the amount of impurities in the blast furnace gas entering the burner of the boiler must be reduced.
(2) To reduce the clogging of the burner, it can be considered to modify the swirl vane of the burner to reduce its impact on the accumulation of impurities without affecting the mixing effect of gas and wind.
(3) The plates for making burners should be made of heat-resistant and corrosion-resistant materials.
(4) When the boiler blast furnace gas burner is put into use, it is fired layer by layer to prevent the multi-layer burner from being fired in a small amount, and adjusting the valve throttling leads to low gas flow rate and aggravates the accumulation of impurities.
(5) The power of the gas itself is not enough to blow off the impurities accumulated on the swirl blades. It may be considered to use an external strong power source to blow off the accumulated impurities.
Measures to reduce the clogging of blast furnace gas burners We mainly implemented the following measures for the cause analysis and solution ideas of blast furnace gas burner clogging:
(1) To improve the gas quality and reduce the impurity content of the gas, it is necessary to increase or improve the dust removal and purification facilities of the gas, but this requires a large capital investment. We only need to reduce the impurities at the boiler burner, so we consider using a thicker pipe at the lower end of the vertical pipe section of the gas main pipeline, using centrifugal force and gravity to make the impurities settle to the bottom of the pipe, and clean up the impurities when the furnace is shut down.
(2) To transform the swirl blades, change the swirl blade wheels from one group to two series in series, and reduce the number of blades on each swirl impeller from the original 18 to 9, and the two impellers The blades are inserted and installed with a spacing of 20cm.
(3) Make use of the timing of regular boiler repairs to make new burners out of high temperature resistant stainless steel 0Gr18Ni9. Its oxidation resistance temperature reaches 850°C, and its corrosion resistance is also strong, which prevents the aggravation of the adhesion of impurities caused by the pits caused by the corrosion of the swirl blades of the burner.
(4) Add a steam purge device at the swirl vane of the blast furnace gas burner. The purge steam is drawn from the boiler superheater steam collector, led to the upper layer of the furnace, and then distributed to the four corners of the furnace. Each swirl blade corresponds to a purge The purging device is composed of steam pipes, electric valves, and steam nozzles. The steam is blown out from the purge port at high speed, using high-temperature heat energy and high-pressure kinetic energy to "bake and soften first, then purge" to blow off accumulated impurities. Purge once every half a month. When purging, take the measures of draining the heating pipe first and cleaning the burner layer by layer. First exit the burner nozzle of the burner and then clean it.
(5) During the operation adjustment, the blast furnace gas burner of the boiler is put into operation layer by layer to prevent the multi-layer burner from being put into operation, and the valve opening is too small to throttle the flow, which will lead to low flow rate of the reformed gas and aggravate the accumulation of impurities. Under the requirement of national environmental protection awareness and national industrial policy of energy conservation and emission reduction, saving coke oven gas with high calorific value and high economic value and making full use of blast furnace gas with low calorific value has become an urgent problem to be solved in coking plants of various iron and steel enterprises. The blast furnace gas burner for tubular furnace uses blast furnace gas as the heat source of the tubular heating furnace in coking plants, which expands the application range of blast furnace gas and reduces energy consumption. It can be widely used in coking plants of iron and steel enterprises, and has good promotion value.
The hot gas burner is a heating facility (such as a boiler, an industrial furnace, etc.) with hot gas as the heat source, and is a special device used to realize the hot gas combustion process. The main function is to introduce hot gas and combustion-supporting air into the heating facility or burner according to a certain proportion and certain mixing conditions, and meet the requirements of the heating process for the direction, shape, rigidity and spreading of the flame. The blast furnace gas burner is designed for the blast furnace tail gas produced by iron and steel enterprises. The blast furnace gas burner uses blast furnace tail gas of any pressure and any calorific value, and can realize automatic ignition and other functions.
Cause Analysis and Solution Ideas of Blast Furnace Gas Burner Blockage The workshop organization conducted an in-depth analysis of the cause of burner blockage. The main reasons are as follows:
(1) Impurities mainly come from blast furnace gas, which are transported to the boiler burner area together with blast furnace gas.
(2) When the blast furnace gas passes through the swirl blades, the airflow rotates and generates a radial velocity along the pipe, the airflow hits the swirl blades, and some impurities adhere to the swirl blades.
(3) The design of the swirl vane of the blast furnace gas burner is unreasonable, and the influence of fuel impurities is not fully considered. When the blast furnace gas passes through the swirl blades, the throttling is obvious, and the number of blades is too large, and the passage between the blades is too small, which intensifies the accumulation of impurities.
(4) The swirl blades are not resistant to corrosion, and blast furnace gas is acidic and corrosive. After the swirl blades are corroded, pits are formed, which intensifies the adhesion and accumulation of impurities.
(5) The swirl blade is close to the furnace, and the impurities are sintered at high temperature.
(6) The pressure of blast furnace gas is low, and it is difficult to blow off by the kinetic energy of the gas itself when impurities accumulate. The lower the pressure of blast furnace gas, the easier it is to accumulate impurities.
Solutions to reduce the blockage of blast furnace gas burners Aiming at the reasons for the blockage of blast furnace gas burners, we have summarized the following solutions:
(1) To reduce the blockage of the burner, the amount of impurities in the blast furnace gas entering the burner of the boiler must be reduced.
(2) To reduce the clogging of the burner, it can be considered to modify the swirl vane of the burner to reduce its impact on the accumulation of impurities without affecting the mixing effect of gas and wind.
(3) The plates for making burners should be made of heat-resistant and corrosion-resistant materials.
(4) When the boiler blast furnace gas burner is put into use, it is fired layer by layer to prevent the multi-layer burner from being fired in a small amount, and adjusting the valve throttling leads to low gas flow rate and aggravates the accumulation of impurities.
(5) The power of the gas itself is not enough to blow off the impurities accumulated on the swirl blades. It may be considered to use an external strong power source to blow off the accumulated impurities.
Measures to reduce the clogging of blast furnace gas burners We mainly implemented the following measures for the cause analysis and solution ideas of blast furnace gas burner clogging:
(1) To improve the gas quality and reduce the impurity content of the gas, it is necessary to increase or improve the dust removal and purification facilities of the gas, but this requires a large capital investment. We only need to reduce the impurities at the boiler burner, so we consider using a thicker pipe at the lower end of the vertical pipe section of the gas main pipeline, using centrifugal force and gravity to make the impurities settle to the bottom of the pipe, and clean up the impurities when the furnace is shut down.
(2) To transform the swirl blades, change the swirl blade wheels from one group to two series in series, and reduce the number of blades on each swirl impeller from the original 18 to 9, and the two impellers The blades are inserted and installed with a spacing of 20cm.
(3) Make use of the timing of regular boiler repairs to make new burners out of high temperature resistant stainless steel 0Gr18Ni9. Its oxidation resistance temperature reaches 850°C, and its corrosion resistance is also strong, which prevents the aggravation of the adhesion of impurities caused by the pits caused by the corrosion of the swirl blades of the burner.
(4) Add a steam purge device at the swirl vane of the blast furnace gas burner. The purge steam is drawn from the boiler superheater steam collector, led to the upper layer of the furnace, and then distributed to the four corners of the furnace. Each swirl blade corresponds to a purge The purging device is composed of steam pipes, electric valves, and steam nozzles. The steam is blown out from the purge port at high speed, using high-temperature heat energy and high-pressure kinetic energy to "bake and soften first, then purge" to blow off accumulated impurities. Purge once every half a month. When purging, take the measures of draining the heating pipe first and cleaning the burner layer by layer. First exit the burner nozzle of the burner and then clean it.
(5) During the operation adjustment, the blast furnace gas burner of the boiler is put into operation layer by layer to prevent the multi-layer burner from being put into operation, and the valve opening is too small to throttle the flow, which will lead to low flow rate of the reformed gas and aggravate the accumulation of impurities. Under the requirement of national environmental protection awareness and national industrial policy of energy conservation and emission reduction, saving coke oven gas with high calorific value and high economic value and making full use of blast furnace gas with low calorific value has become an urgent problem to be solved in coking plants of various iron and steel enterprises. The blast furnace gas burner for tubular furnace uses blast furnace gas as the heat source of the tubular heating furnace in coking plants, which expands the application range of blast furnace gas and reduces energy consumption. It can be widely used in coking plants of iron and steel enterprises, and has good promotion value.