Ignition process of stainless steel hot continuous annealing furnace

Abstract

The invention discloses an ignition process of a stainless steel hot continuous annealing furnace. The ignition process comprises the following steps: (1) preparing equipment, namely respectively arranging needle type gas flow regulating valves controlled by an annealing furnace control system on gas pipelines corresponding to burners in eight heating areas of an open fire heating area of the annealing furnace; (2) ignition control: (2.1) in the primary ignition process of the annealing furnace, the air amount and the gas amount of each burner in eight heating areas of an open fire heating area of the annealing furnace during ignition are given according to a formula; and (2.2) after the annealing furnace is successfully ignited for the first time, in the operation process of the annealing furnace, the air amount and the gas amount are given according to the maximum amount when all the burners in the eight heating areas of the open fire heating area of the annealing furnace are ignited again after flameout. The ignition device has the advantage of high ignition success rate.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel, and in particular to an ignition process of a stainless steel hot continuous annealing furnace. Background Art

[0002] Stainless steel hot continuous annealing furnace (annealing furnace for short) is an important heat treatment equipment for stainless steel manufacturing. There are many types of annealing furnaces, and the annealing furnace without bleed air burner is one of them. There is no bleed air burner in the main burners of the eight heating zones of the open flame heating zone of this annealing furnace without bleed air burner. When igniting, each main burner is ignited only by the built-in spark plug. The disadvantages of the annealing furnace without bleed air burner currently used are: the amount of air and gas during ignition is too large, which makes it difficult to ignite the burner. Frequent ignition is required to ignite successfully. The increase in the number of ignitions not only causes a waste of gas, but also reduces the life of the refractory materials around the burner; at the same time, the difficulty in igniting the burner also leads to a long initial ignition and heating time of the annealing furnace. The initial ignition and heating time of the annealing furnace is as long as 1.5 hours each time, which affects the production efficiency of the annealing furnace. Summary of the invention

[0003] The purpose of the invention is to provide an ignition process for a stainless steel hot continuous annealing furnace with a high ignition success rate.

[0004] To achieve the above object, the present invention adopts the following technical solution: a stainless steel hot continuous annealing furnace ignition process, comprising: (1) Equipment preparation: A needle-type gas flow regulating valve controlled by the annealing furnace control system is respectively installed on the gas pipeline corresponding to each burner in the eight heating zones of the annealing furnace open flame heating zone; (2) Ignition control: (2.1) During the initial ignition process when all burners in the eight heating zones of the open flame heating zone of the annealing furnace are successfully ignited from the shutdown state, the air volume and fuel gas volume of each burner in the eight heating zones of the open flame heating zone of the annealing furnace when igniting are given as follows: (2.1.1) The air volume and gas volume of each burner in the first heating zone when ignited are given by the following formula: CPT1=(1500+N×300) / n; Q1= CPT1 / 12; Among them, Q1 is the gas volume of the burner, CPT1 is the air volume of the burner, N is the number of burners currently ignited in the first heating zone, and n is the number of burners in the first heating zone; (2.1.2) The air volume and gas volume of each burner in the second heating zone when ignited are given by the following formula: CPT2=(1500+N×300) / n; Q2= CPT2 / 12; Among them, Q2 is the gas volume of the burner, CPT2 is the air volume of the burner, N is the number of burners currently ignited in the second heating zone, and n is the number of burners in the second heating zone; (2.1.3) The air volume and gas volume of each burner in the third heating zone when ignited are given by the following formula: CPT3=(800+N×250) / n; Q3= CPT3 / 12; Among them, Q3 is the gas volume of the burner, CPT3 is the air volume of the burner, N is the number of burners currently ignited in the third heating zone, and n is the number of burners in the third heating zone; (2.1.4) The air volume and gas volume of each burner in the fourth heating zone when ignited are given by the following formula: CPT4=(800+N×250) / n; Q4= CPT4 / 12; Wherein, Q4 is the gas volume of the burner, CPT4 is the air volume of the burner, N is the number of burners currently ignited in the fourth heating zone, and n is the number of burners in the fourth heating zone; (2.1.5) The air volume and gas volume of each burner in the fifth heating zone when ignited are given by the following formula: CPT5=(700+N×150) / n; Q5= CPT5 / 12; Among them, Q5 is the gas volume of the burner, CPT5 is the air volume of the burner, N is the number of burners currently ignited in the fifth heating zone, and n is the number of burners in the fifth heating zone; (2.1.6) The air volume and gas volume of each burner in the sixth heating zone when ignited are given by the following formula: CPT6=(700+N×150) / n; Q6= CPT6 / 12; Among them, Q6 is the gas volume of the burner, CPT6 is the air volume of the burner, N is the number of burners currently ignited in the sixth heating zone, and n is the number of burners in the sixth heating zone; (2.1.7) The air volume and gas volume of each burner in the seventh heating zone when ignited are given by the following formula: CPT7=(500+N×120) / n; Q7= CPT7 / 12; Among them, Q7 is the gas volume of the burner, CPT7 is the air volume of the burner, N is the number of burners currently ignited in the seventh heating zone, and n is the number of burners in the seventh heating zone; (2.1.8) The air volume and gas volume of each burner in the eighth heating zone when ignited are given by the following formula: CPT8=(400+N×100) / n; Q8= CPT8 / 12; Among them, Q8 is the gas volume of the burner, CPT8 is the air volume of the burner, N is the number of burners currently ignited in the eighth heating zone, and n is the number of burners in the eighth heating zone; (2.2) After the annealing furnace is successfully ignited for the first time, during the operation of the annealing furnace, the air volume and fuel gas volume when each burner in the eight heating zones of the annealing furnace open flame heating zone is re-ignited after the flame is turned off are given by the following formula: Q = P × t × 860 ÷ q; CPT = Q × 12; Among them, Q is the gas volume of the burner, CPT is the air volume of the burner, P is the power of a single burner, t is the active power coefficient of a single burner, and q is the calorific value of the gas.

[0005] Furthermore, in the aforementioned ignition process of a stainless steel hot continuous annealing furnace, after the annealing furnace is successfully ignited for the first time, during the operation of the annealing furnace, the air volume and fuel gas volume when each burner in the eight heating zones of the open flame heating zone of the annealing furnace is re-ignited after being extinguished are given as follows: (2.2.1) The air volume and gas volume when each burner in the first and second heating zones is re-ignited after flameout are given. The power P of each burner in the first and second heating zones is 630kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume when each burner in the first and second heating zones is re-ignited after flameout is rounded to: 50m 3 / h; air volume rounded to: 600m 3 / h; (2.2.2) The air volume and gas volume when each burner in the third and fourth heating zones is re-ignited after flameout are given. The power P of each burner in the third and fourth heating zones is 450kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume when each burner in the third and fourth heating zones is re-ignited after flameout is rounded to: 36m 3 / h; air volume rounded to: 432m 3 / h; (2.2.3) When the air volume and gas volume of each burner in the fifth and sixth heating zones are re-ignited after flameout, the power P of each burner in the fifth and sixth heating zones is 320kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume of each burner in the fifth and sixth heating zones when flameout is re-ignited is rounded to: 26m 3 / h; air volume rounded to: 312m 3 / h; (2.2.4) When the air volume and gas volume of each burner in the seventh and eighth heating zones are re-ignited after flameout, the power P of each burner in the seventh and eighth heating zones is 230kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume of each burner in the seventh and eighth heating zones when flameout is re-ignited is rounded to: 18m 3 / h; air volume rounded to: 216m 3 / h.

[0006] Furthermore, in the aforementioned ignition process of a stainless steel hot continuous annealing furnace, the number of burners in the first, second, third, fourth, fifth, sixth and seventh heating zones is 10, and the number of burners in the eighth heating zone is 8.

[0007] Further, in the aforementioned ignition process of a stainless steel hot continuous annealing furnace, the needle-type gas flow regulating valves in the first, second, third, fourth, fifth and sixth heating zones are DN40 needle-type valves, and the needle-type gas flow regulating valves in the seventh and eighth heating zones are DN25 needle-type valves; According to the gas volume calculated in (2.2.1), set the maximum opening of the DN40 needle valve in the first and second heating zones. The specific calculation formula is: L 12 =(Q 12 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 12 is the gas volume calculated in step (2.2.1), Q 阀门全关 The flow rate of the DN40 needle valve when the valve is fully closed is 3m³ / h; Q 阀门最大 The maximum flow rate of the DN40 needle valve is 70m³ / h; L 阀门最大流量开度 The maximum opening of the DN40 needle valve is 27 turns; According to the gas volume calculated in (2.2.2), set the maximum opening of the DN40 needle valve in the third and fourth heating zones. The specific calculation formula is: L 34 =(Q 34 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 34 is the gas volume calculated in step (2.2.2), Q 阀门全关 The flow rate of the DN40 needle valve when the valve is fully closed is 3m³ / h; Q 阀门最大 The maximum flow rate of the DN40 needle valve is 70m³ / h; L 阀门最大流量开度The maximum opening of the DN40 needle valve is 27 turns; According to the gas volume calculated in (2.2.3), set the maximum opening of the DN40 needle valve in the fifth and sixth heating zones. The specific calculation formula is: L 56 =(Q 56 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 56 is the gas volume calculated in step (2.2.3), Q 阀门全关 The flow rate of the DN40 needle valve when the valve is fully closed is 3m³ / h; Q 阀门最大 The maximum flow rate of the DN40 needle valve is 70m³ / h; L 阀门最大流量开度 The maximum opening of the DN40 needle valve is 27 turns; According to the gas volume calculated in (2.2.4), set the maximum opening of the DN25 needle valve in the seventh and eighth heating zones. The specific calculation formula is: L 78 =(Q 78 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 78 is the gas volume calculated in step (2.2.4), Q 阀门全关 The flow rate of the DN25 needle valve when the valve is fully closed is 2m³ / h; Q 阀门最大 The maximum flow rate of the DN25 needle valve is 35m³ / h; L 阀门最大流量开度 It is the maximum opening of the DN25 needle valve and is 13.5 turns.

[0008] Through the implementation of the above technical scheme, the beneficial effects of the present invention are as follows: a needle-type gas flow regulating valve is arranged on the gas pipeline of each burner to realize the control and regulation of the gas volume of all burners in each heating zone, which can limit the maximum gas flow of each burner in each heating zone, balance the gas flow between the burners in each zone, buffer and reduce the gas intake pressure of the burner, and avoid the problems of high-pressure gas and air-fuel ratio imbalance causing burner ignition difficulties; and the gas volume and air volume of the initial ignition condition and the non-initial ignition condition are specially controlled and set, so as to ensure that the burner can have a high ignition success rate under different working conditions, and the ignition heating time is shortened from the original 1.5 hours to 1 hour, and the heating preparation time is shortened by 0.5 hours each time, which not only reduces the 700m required for 0.5 hours of heating 3 Gas consumption also increases the production time by 0.5 hours, and 33 tons of additional steel coils can be produced each time, improving production efficiency. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments.

[0010] A stainless steel hot continuous annealing furnace ignition process, comprising: (1) Equipment preparation: A needle-type gas flow regulating valve controlled by the annealing furnace control system is respectively installed on the gas pipeline corresponding to each burner in the eight heating zones of the annealing furnace open flame heating zone; The number of burners in the first, second, third, fourth, fifth, sixth and seventh heating zones is 10, and the number of burners in the eighth heating zone is 8; the needle-type gas flow regulating valves in the first, second, third, fourth, fifth and sixth heating zones are DN40 needle-type valves produced by Beijing Xingdaqi Thermal Control Equipment Co., Ltd., and the needle-type gas flow regulating valves in the seventh and eighth heating zones are DN25 needle-type valves produced by Beijing Xingdaqi Thermal Control Equipment Co., Ltd.; According to the gas volume calculated in (2.2.1), set the maximum opening of the DN40 needle valve in the first and second heating zones. The specific calculation formula is: L 12 =(Q 12 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 12 is the gas volume calculated in step (2.2.1), Q 阀门全关 The flow rate of the DN40 needle valve when the valve is fully closed is 3m³ / h; Q 阀门最大 The maximum flow rate of the DN40 needle valve is 70m³ / h; L 阀门最大流量开度 is the maximum opening of the DN40 needle valve and is set to 27 turns; according to the formula, the maximum opening of the DN40 needle valve in the first and second heating zones is set to 12.69 turns; According to the gas volume calculated in (2.2.2), set the maximum opening of the DN40 needle valve in the third and fourth heating zones. The specific calculation formula is: L 34 =(Q 34 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 34 is the gas volume calculated in step (2.2.2), Q 阀门全关 The flow rate of the DN40 needle valve when the valve is fully closed is 3m³ / h; Q 阀门最大 The maximum flow rate of the DN40 needle valve is 70m³ / h; L 阀门最大流量开度is the maximum opening of the DN40 needle valve and is set to 27 turns; according to the formula, the maximum opening of the DN40 needle valve in the third and fourth heating zones is set to 8.9 turns; According to the gas volume calculated in (2.2.3), set the maximum opening of the DN40 needle valve in the fifth and sixth heating zones. The specific calculation formula is: L 56 =(Q 56 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 56 is the gas volume calculated in step (2.2.3), Q 阀门全关 The flow rate of the DN40 needle valve when the valve is fully closed is 3m³ / h; Q 阀门最大 The maximum flow rate of the DN40 needle valve is 70m³ / h; L 阀门最大流量开度 is the maximum opening of the DN40 needle valve and is set to 27 turns; according to the formula, the maximum opening of the DN40 needle valve in the fifth and sixth heating zones is set to 6.21 turns; According to the gas volume calculated in (2.2.4), set the maximum opening of the DN25 needle valve in the seventh and eighth heating zones. The specific calculation formula is: L 78 =(Q 78 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 78 is the gas volume calculated in step (2.2.4), Q 阀门全关 The flow rate of the DN25 needle valve when the valve is fully closed is 2m³ / h; Q 阀门最大 The maximum flow rate of the DN25 needle valve is 35m³ / h; L 阀门最大流量开度 The maximum opening of the DN25 needle valve is 13.5 turns. According to the formula, the maximum opening of the DN40 needle valve in the seventh and eighth heating zones is set to 4.32 turns. The maximum opening of each needle valve can be set so that the maximum flow of the needle valve can be adapted to the maximum operating gas flow of the corresponding burner. In this way, when ignition is not performed under the initial ignition condition, since the gas volume during ignition under this condition is the maximum gas flow of the corresponding burner, the existence of the needle valve plays a buffering and pressure-reducing role on the gas, reduces gas fluctuations, and avoids the unstable flame being blown out by high-pressure gas during ignition, which is conducive to improving the ignition success rate and ensuring smooth production. (2) Ignition control: (2.1) During the initial ignition process when all burners in the eight heating zones of the open flame heating zone of the annealing furnace are successfully ignited from the shutdown state; the air volume and fuel gas volume when each burner in the eight heating zones of the open flame heating zone of the annealing furnace is ignited are given as follows: (2.1.1) The air volume and gas volume of each burner in the first heating zone when ignited are given by the following formula: CPT1=(1500+N×300) / n; Q1= CPT1 / 12; Among them, Q1 is the gas volume of the burner, CPT1 is the air volume of the burner, N is the number of burners currently ignited in the first heating zone, and n is the number of burners in the first heating zone; (2.1.2) The air volume and gas volume of each burner in the second heating zone when ignited are given by the following formula: CPT2=(1500+N×300) / n; Q2= CPT2 / 12; Among them, Q2 is the gas volume of the burner, CPT2 is the air volume of the burner, N is the number of burners currently ignited in the second heating zone, and n is the number of burners in the second heating zone; (2.1.3) The air volume and gas volume of each burner in the third heating zone when ignited are given by the following formula: CPT3=(800+N×250) / n; Q3= CPT3 / 12; Among them, Q3 is the gas volume of the burner, CPT3 is the air volume of the burner, N is the number of burners currently ignited in the third heating zone, and n is the number of burners in the third heating zone; (2.1.4) The air volume and gas volume of each burner in the fourth heating zone when ignited are given by the following formula: CPT4=(800+N×250) / n; Q4= CPT4 / 12; Wherein, Q4 is the gas volume of the burner, CPT4 is the air volume of the burner, N is the number of burners currently ignited in the fourth heating zone, and n is the number of burners in the fourth heating zone; (2.1.5) The air volume and gas volume of each burner in the fifth heating zone when ignited are given by the following formula: CPT5=(700+N×150) / n; Q5= CPT5 / 12; Among them, Q5 is the gas volume of the burner, CPT5 is the air volume of the burner, N is the number of burners currently ignited in the fifth heating zone, and n is the number of burners in the fifth heating zone; (2.1.6) The air volume and gas volume of each burner in the sixth heating zone when ignited are given by the following formula: CPT6=(700+N×150) / n; Q6= CPT6 / 12; Among them, Q6 is the gas volume of the burner, CPT6 is the air volume of the burner, N is the number of burners currently ignited in the sixth heating zone, and n is the number of burners in the sixth heating zone; (2.1.7) The air volume and gas volume of each burner in the seventh heating zone when ignited are given by the following formula: CPT7=(500+N×120) / n; Q7= CPT7 / 12; Among them, Q7 is the gas volume of the burner, CPT7 is the air volume of the burner, N is the number of burners currently ignited in the seventh heating zone, and n is the number of burners in the seventh heating zone; (2.1.8) The air volume and gas volume of each burner in the eighth heating zone when ignited are given by the following formula: CPT8=(400+N×100) / n; Q8= CPT8 / 12; Among them, Q8 is the gas volume of the burner, CPT8 is the air volume of the burner, N is the number of burners currently ignited in the eighth heating zone, and n is the number of burners in the eighth heating zone; During the initial ignition of the annealing furnace, the gas and air volumes are effectively controlled to avoid ignition at the maximum flow rate during operation, thereby reducing the probability of unstable flames being directly blown out by large flow gas during the initial ignition process, thereby effectively improving the success rate of the initial ignition; (2.2) After the annealing furnace is successfully ignited for the first time, during the operation of the annealing furnace, the air volume and fuel gas volume when each burner in the eight heating zones of the annealing furnace open flame heating zone is extinguished and then re-ignited (this ignition condition is defined as non-initial ignition) are given by the following formula: Q = P × t × 860 ÷ q; CPT = Q × 12; Among them, Q is the gas volume of the burner, CPT is the air volume of the burner, P is the power of a single burner, t is the active power coefficient of a single burner, and q is the calorific value of the gas; In this embodiment: (2.2.1) The air volume and gas volume when each burner in the first and second heating zones is re-ignited after flameout are given. The power P of each burner in the first and second heating zones is 630kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume when each burner in the first and second heating zones is re-ignited after flameout is rounded to: 50m 3 / h; air volume rounded to: 600m3 / h; (2.2.2) The air volume and gas volume when each burner in the third and fourth heating zones is re-ignited after flameout are given. The power P of each burner in the third and fourth heating zones is 450kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume when each burner in the third and fourth heating zones is re-ignited after flameout is rounded to: 36m 3 / h; air volume rounded to: 432m 3 / h; (2.2.3) When the air volume and gas volume of each burner in the fifth and sixth heating zones are re-ignited after flameout, the power P of each burner in the fifth and sixth heating zones is 320kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume of each burner in the fifth and sixth heating zones when flameout is re-ignited is rounded to: 26m 3 / h; air volume rounded to: 312m 3 / h; (2.2.4) When the air volume and gas volume of each burner in the seventh and eighth heating zones are re-ignited after flameout, the power P of each burner in the seventh and eighth heating zones is 230kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume of each burner in the seventh and eighth heating zones when flameout is re-ignited is rounded to: 18m 3 / h; air volume rounded to: 216m 3 / h.

[0011] In order to more intuitively understand the method for setting the amount of gas and the amount of air during initial ignition and non-initial ignition in the present invention, the method for setting the amount of gas and the amount of air during initial ignition and non-initial ignition is explained below through the formation of a table, as shown in the following Table 1:

[0012] The advantages of the present invention are as follows: a needle-type gas flow regulating valve is arranged on the gas pipeline of each burner to realize the control and regulation of the gas amount of all burners in each heating zone, limit the maximum gas flow of each burner in each heating zone, balance the gas flow between the burners in each zone, buffer and reduce the gas intake pressure of the burner, avoid the problems of high-pressure gas and air-fuel ratio imbalance causing the difficulty of burner ignition; and the gas amount and air amount of the initial ignition condition and the non-initial ignition condition are specially controlled and set, so as to ensure that the burner can have a high ignition success rate under different working conditions, and the ignition heating time is shortened from the original 1.5 hours to 1 hour, and the heating preparation time is shortened by 0.5 hours each time, which not only reduces the 700m required for 0.5 hour heating 3Gas consumption also increases the production time by 0.5 hours, and 33 tons of additional steel coils can be produced each time, improving production efficiency.

[0013] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A stainless steel hot continuous annealing furnace ignition process, characterized in that: include: (1) Equipment preparation: A needle-type gas flow regulating valve controlled by the annealing furnace control system is respectively installed on the gas pipeline corresponding to each burner in the eight heating zones of the annealing furnace open flame heating zone; (2) Ignition control: (2.1) During the initial ignition process when all burners in the eight heating zones of the open flame heating zone of the annealing furnace are successfully ignited from the shutdown state, the air volume and fuel gas volume of each burner in the eight heating zones of the open flame heating zone of the annealing furnace when igniting are given as follows: (2.1.1) The air volume and gas volume of each burner in the first heating zone when ignited are given by the following formula: CPT1=(1500+N×300) / n; Q1= CPT1 / 12; Among them, Q1 is the gas volume of the burner, CPT1 is the air volume of the burner, N is the number of burners currently ignited in the first heating zone, and n is the number of burners in the first heating zone; (2.1.2) The air volume and gas volume of each burner in the second heating zone when ignited are given by the following formula: CPT2=(1500+N×300) / n; Q2= CPT2 / 12; Among them, Q2 is the gas volume of the burner, CPT2 is the air volume of the burner, N is the number of burners currently ignited in the second heating zone, and n is the number of burners in the second heating zone; (2.1.3) The air volume and gas volume of each burner in the third heating zone when ignited are given by the following formula: CPT3=(800+N×250) / n; Q3= CPT3 / 12; Among them, Q3 is the gas volume of the burner, CPT3 is the air volume of the burner, N is the number of burners currently ignited in the third heating zone, and n is the number of burners in the third heating zone; (2.1.4) The air volume and gas volume of each burner in the fourth heating zone when ignited are given by the following formula: CPT4=(800+N×250) / n; Q4= CPT4 / 12; Wherein, Q4 is the gas volume of the burner, CPT4 is the air volume of the burner, N is the number of burners currently ignited in the fourth heating zone, and n is the number of burners in the fourth heating zone; (2.1.5) The air volume and gas volume of each burner in the fifth heating zone when ignited are given by the following formula: CPT5=(700+N×150) / n; Q5= CPT5 / 12; Among them, Q5 is the gas volume of the burner, CPT5 is the air volume of the burner, N is the number of burners currently ignited in the fifth heating zone, and n is the number of burners in the fifth heating zone; (2.1.6) The air volume and gas volume of each burner in the sixth heating zone when ignited are given by the following formula: CPT6=(700+N×150) / n; Q6= CPT6 / 12; Among them, Q6 is the gas volume of the burner, CPT6 is the air volume of the burner, N is the number of burners currently ignited in the sixth heating zone, and n is the number of burners in the sixth heating zone; (2.1.7) The air volume and gas volume of each burner in the seventh heating zone when ignited are given by the following formula: CPT7=(500+N×120) / n; Q7= CPT7 / 12; Among them, Q7 is the gas volume of the burner, CPT7 is the air volume of the burner, N is the number of burners currently ignited in the seventh heating zone, and n is the number of burners in the seventh heating zone; (2.1.8) The air volume and gas volume of each burner in the eighth heating zone when ignited are given by the following formula: CPT8=(400+N×100) / n; Q8= CPT8 / 12; Among them, Q8 is the gas volume of the burner, CPT8 is the air volume of the burner, N is the number of burners currently ignited in the eighth heating zone, and n is the number of burners in the eighth heating zone; (2.2) After the annealing furnace is successfully ignited for the first time, during the operation of the annealing furnace, the air volume and fuel gas volume when each burner in the eight heating zones of the annealing furnace open flame heating zone is re-ignited after the flame is turned off are given by the following formula: Q = P × t × 860 ÷ q; CPT = Q × 12; Among them, Q is the gas volume of the burner, CPT is the air volume of the burner, P is the power of a single burner, t is the active power coefficient of a single burner, and q is the calorific value of the gas.

2. The ignition process of a stainless steel hot continuous annealing furnace according to claim 1, characterized in that: After the annealing furnace is successfully ignited for the first time, during the operation of the annealing furnace, the air volume and fuel gas volume when each burner in the eight heating zones of the annealing furnace open flame heating zone is re-ignited after the flame is turned off are given as follows: (2.2.1) The air volume and gas volume when each burner in the first and second heating zones is re-ignited after flameout are given. The power P of each burner in the first and second heating zones is 630kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume when each burner in the first and second heating zones is re-ignited after flameout is rounded to: 50m 3 / h; air volume rounded to: 600m 3 / h; (2.2.2) The air volume and gas volume when each burner in the third and fourth heating zones is re-ignited after flameout are given. The power P of each burner in the third and fourth heating zones is 450kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume when each burner in the third and fourth heating zones is re-ignited after flameout is rounded to: 36m 3 / h; air volume rounded to: 432m 3 / h; (2.2.3) When the air volume and gas volume of each burner in the fifth and sixth heating zones are re-ignited after flameout, the power P of each burner in the fifth and sixth heating zones is 320kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; the gas volume of each burner in the fifth and sixth heating zones when flameout is re-ignited is rounded to: 26m 3 / h; air volume rounded to: 312m 3 / h; (2.2.4) When the air volume and gas volume are given when the burners in the seventh and eighth heating zones are re-ignited after flameout, the power P of each burner in the seventh and eighth heating zones is 230kW, the active power coefficient t of each burner is 0.75, and the calorific value of the gas is 8076kcal / m³; The gas volume when each burner in the seventh and eighth heating zones is re-ignited after flameout is rounded to: 18m 3 / h; air volume rounded to: 216m 3 / h.

3. The ignition process of a stainless steel hot continuous annealing furnace according to claim 1, characterized in that: The number of burners in the first, second, third, fourth, fifth, sixth and seventh heating zones is 10, and the number of burners in the eighth heating zone is 8.

4. The ignition process of a stainless steel hot continuous annealing furnace according to claim 1, 2 or 3, characterized in that: The needle-type gas flow regulating valves for the first, second, third, fourth, fifth and sixth heating zones are DN40 needle-type valves, and the needle-type gas flow regulating valves for the seventh and eighth heating zones are DN25 needle-type valves; According to the gas volume calculated in (2.2.1), set the maximum opening of the DN40 needle valve in the first and second heating zones. The specific calculation formula is: L 12 =(Q 12 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 12 is the gas volume calculated in step (2.2.1), Q 阀门全关 The flow rate of the DN40 needle valve when the valve is fully closed is 3m³ / h; Q 阀门最大 The maximum flow rate of the DN40 needle valve is 70m³ / h; L 阀门最大流量开度 The maximum opening of the DN40 needle valve is 27 turns; According to the gas volume calculated in (2.2.2), set the maximum opening of the DN40 needle valve in the third and fourth heating zones. The specific calculation formula is: L 34 =(Q 34 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 34 is the gas volume calculated in step (2.2.2), Q 阀门全关 The flow rate of the DN40 needle valve when the valve is fully closed is 3m³ / h; Q 阀门最大 The maximum flow rate of the DN40 needle valve is 70m³ / h; L 阀门最大流量开度 The maximum opening of the DN40 needle valve is 27 turns; According to the gas volume calculated in (2.2.3), set the maximum opening of the DN40 needle valve in the fifth and sixth heating zones. The specific calculation formula is: L 56 =(Q 56 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 56 is the gas volume calculated in step (2.2.3), Q 阀门全关 The flow rate of the DN40 needle valve when the valve is fully closed is 3m³ / h; Q 阀门最大 The maximum flow rate of the DN40 needle valve is 70m³ / h; L 阀门最大流量开度 The maximum opening of the DN40 needle valve is 27 turns; According to the gas volume calculated in (2.2.4), set the maximum opening of the DN25 needle valve in the seventh and eighth heating zones. The specific calculation formula is: L 78 =(Q 78 -Q 阀门全关 )÷Q 阀门最大 ×L 阀门最大流量开度 ×70%; Among them, Q 78 is the gas volume calculated in step (2.2.4), Q 阀门全关 The flow rate of the DN25 needle valve when the valve is fully closed is 2m³ / h; Q 阀门最大 The maximum flow rate of the DN25 needle valve is 35m³ / h; L 阀门最大流量开度 It is the maximum opening of the DN25 needle valve and is 13.5 turns.

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