A control method for a pulse heating furnace

Abstract

The present invention provides a control method for a pulse heating furnace, including: S1 collecting the temperature information of billets in any two adjacent heating zones and the actual temperature information of the heating zones; S2 obtaining the burner load coefficient a of the heating zone according to the billet temperature information i ; S3 judging whether the actual temperature t of the heating zone is greater than a preset temperature, and obtaining the opening and closing states b of each burner according to the judgment result i , where, closed b i = 0, open b i = 1; S4 calling the rated power flow x of each burner in the heating zone in the database i ; S5 calculating the required predetermined gas input amount Q1 for two adjacent heating zones; S6 adjusting the gas regulating valve of the heating zone according to the calculated predetermined gas input amount Q1. This application adjusts the gas flow in real time according to the billet type, and when the heat load demand is low, it can appropriately reduce the gas flow as needed. On the premise of ensuring the best working state of the burner, it solves the problem of high energy consumption of the traditional pulse combustion control heating furnace under the low heat load demand state.

Description

Technical Field

[0001] The present invention relates to the technical field of heating furnaces, and particularly to a control method for a pulse heating furnace. Background Art

[0002] When a traditional pulse combustion heating furnace is controlled, once the burner starts working, it operates at full load and rated power. Theoretically, when the burner is operating at full load, the gas flow rate, flame shape, and thermal efficiency can all reach the optimal state, there will be no excess air and combustion in the furnace, effectively reducing fuel consumption and nitrogen oxide emissions.

[0003] In the actual production process of a heating furnace, when a high heat load is required for the billets heated in a certain heating zone of the heating furnace, the burners operating at full load in the traditional pulse combustion control can well handle the heating mode at this place. However, the billets heated in the heating furnace are not constant. If the billets heated in a certain heating zone of the heating furnace are directly hot-charged and hot-delivered billets (continuous casting billets), the inlet temperature of the billets can be as high as over 700 °C. At this time, each group of burners still operates at full load, and it is very easy to cause the heating temperature at this place to far exceed the set temperature within one combustion timing and combustion time of the pulse combustion control, resulting in waste of energy and poor temperature control accuracy. Summary of the Invention

[0004] In view of the above problems, the present invention provides a control method for a pulse heating furnace.

[0005] A control method for a pulse heating furnace, the control method of the pulse heating furnace specifically includes the following:

[0006] S1 Collect the billet temperature information and the actual temperature information of the heating zone in any two adjacent heating zones;

[0007] S2 Obtain the burner load coefficient ai of the heating zone according to the billet temperature information;

[0008] S3 Judge whether the actual temperature t of the heating zone is greater than the preset temperature, and according to the judgment result, obtain the opening and closing state b of each burner i , where, closed b i = 0, open b i = 1;

[0009] S4 Call the rated power flow rate x of each burner in the heating zone in the database i ;

[0010] S5 Calculate the required predetermined gas input amount Q1 for two adjacent heating zones;

[0011] Wherein,

[0012] The predetermined gas input of two adjacent heating zones in Q1,

[0013] a i The load factor of the burner,

[0014] x i The rated power flow of the burner,

[0015] b i The opening and closing state of the burner;

[0016] S6 According to the calculated predetermined gas input Q1, adjust the gas regulating valve of the heating zone so that the actual gas input Q2 is equal to the predetermined gas input Q1 of the heating zone.

[0017] In a preferred embodiment, collect the actual temperature information of the heating zone through a thermocouple; collect the billet temperature information of the heating zone through an infrared pyrometer.

[0018] In a preferred embodiment, the burner load factor a in step S2 i Is the burner load factor measured through experiments at different billet temperatures to make the heating zone reach the normal working temperature, thus avoiding waste of burner energy.

[0019] In a preferred embodiment, in step S3, the judgment of whether the actual temperature t of the heating zone is greater than the preset temperature includes the following steps:

[0020] S31 Judge whether the actual temperature t of the heating zone is greater than the preset temperature T1;

[0021] If t < T1, the burner burns for the first 60s and exhausts smoke for the next 60s, and the burner works continuously according to this rule;

[0022] S32 As the temperature rises, if T1 < t < T2, where T2 is the upper limit temperature, the burner burns within the first 35s, then the burner stops working for 25s, the burner exhausts smoke for the next 35s, and then the burner stops working for 25s;

[0023] S33 Continue to judge the range of t. If T1 < t < T2, the burner burns within the first 10s, then the burner stops working for 50s, the burner exhausts smoke for the next 10s, and then the burner stops working for 50s, and continues to work according to this rule;

[0024] S34 As the temperature continues to rise, if T2 < t, the burner stops working;

[0025] S35 As the temperature begins to decrease, if T1 < t < T2, step S33;

[0026] When the temperature of S36 continues to decrease, if t < T1, the burner burns within the first 35 s, then the burner stops working for 25 s, the burner exhausts smoke within the next 35 s, and then the burner stops working for 25 s. Then, continue to judge t. If t < T1, execute S31;

[0027] Among them, when the burner burns, b i = 1; when the burner exhausts smoke or does not work, b i = 0.

[0028] In a preferred embodiment, T1 = 1000 °C and T2 = 1015 °C.

[0029] In a preferred embodiment, in step S3, the judgment of whether the actual temperature t of the heating zone is greater than the preset temperature includes the following steps:

[0030] S31’ Judge whether the actual temperature t of the heating zone is greater than the upper limit temperature T2’;

[0031] If T2’ < t, the burner stops working;

[0032] S32’ The temperature decreases. When t decreases to T1’, the burner burns in the first 60 s and exhausts smoke in the next 60 s, and works according to this rule;

[0033] S33’ The temperature rises. If T1’ < t < T2’, the burner burns in the first 60 s and exhausts smoke in the next 60 s, and works according to this rule;

[0034] Among them, when the burner burns, b i = 1; when the burner exhausts smoke or does not work, b i = 0.

[0035] In a preferred embodiment, T1’ = 990 °C and T2’ = 1000 °C.

[0036] A control system for implementing the control method of a pulse heating furnace includes:

[0037] An acquisition module, used to acquire the billet temperature information and the actual temperature information of the heating zone;

[0038] A judgment module, electrically connected to the acquisition module, used to receive the actual temperature information of the heating zone collected by the acquisition module, judge whether the actual temperature information of the heating zone is greater than the preset temperature, and obtain the b i value;

[0039] A database, which internally includes the load coefficient a of the burner corresponding to the billet temperature information i and the rated power flow x of the burner i ;

[0040] The control system is electrically connected to the acquisition module, the judgment module, and the database, and is used to receive b from the judgment module, receive the billet temperature information in the heating zone of the acquisition module, and call the load coefficient a of the burner corresponding to the billet temperature information in the database according to the billet temperature information i value, call the rated power flow x of the corresponding burner in the database i , and calculate the predetermined gas input Q1; i

[0041] The gas regulating valve is electrically connected to the control system and is used to adjust the opening of the gas regulating valve according to the predetermined gas input Q1 calculated by the control system, so that the actual gas input Q2 is equal to the predetermined gas input Q1 in the heating zone.

[0042] The control method of the pulse heating furnace of the present invention has the following technical effects:

[0043] 1. The control method of the pulse heating furnace in this application retains the pulse combustion control method. According to the characteristic of switching the burner according to the temperature demand, it can ensure the accuracy of furnace temperature control.

[0044] 2. The control method of the pulse heating furnace in this application can adjust the gas flow in real time according to the billet type in each heating section. When the heat load demand is low, the gas flow can be appropriately reduced as needed. On the premise of ensuring the best working state of the burner, it solves the problem of high energy consumption of the traditional pulse combustion control heating furnace under the low heat load demand state. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Read the following description of the exemplary embodiments with reference to the accompanying drawings, and other characteristic features and advantages of the present invention will become clear. The drawings incorporated into the specification and constituting a part of the specification show the embodiments of the present invention and are used to explain the principles of the present invention together with the description. In these drawings, similar reference numerals are used to represent similar elements. The following drawings in the description are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 The principle flowchart of the control method of the pulse heating furnace of the present invention;

[0047] Figure 2 The heating schematic diagram in the heating zone of the control method of the pulse heating furnace of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] ​To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other arbitrarily.

[0049] The control method of the pulse heating furnace will be described in detail below with reference to the accompanying drawings and embodiments.

[0050] A control method of a pulse heating furnace, and the control method of the pulse heating furnace specifically includes the following:

[0051] S1 Collect the temperature information of the billets in any two adjacent heating zones through an infrared pyrometer and collect the actual temperature information of two adjacent heating zones through a thermocouple;

[0052] S2 Call the database according to the billet temperature information to obtain the burner load coefficient a of the heating zone i , where the burner load coefficient a i is the burner load coefficient measured through experiments at different billet temperatures to make the heating zone reach the normal working temperature;

[0053] S3 Judge whether the actual temperature t of the heating zone is greater than the preset temperature, and according to the judgment result, obtain the opening and closing state b of each burner i , where, closed b i = 0, open b i = 1;

[0054] S4 Call the rated power flow x of each burner in the heating zone in the database i ;

[0055] S5 Calculate the required predetermined gas input Q1 for two adjacent heating zones;

[0056] Wherein,

[0057] Q1 is the predetermined gas input for two adjacent heating zones, a i is the load coefficient of the burner, x i is the rated power flow of the burner, b i is the opening and closing state of the burner;

[0058] S6 Adjust the gas regulating valve of the heating zone according to the calculated predetermined gas input Q1 so that the actual gas input Q2 is equal to the predetermined gas input Q1 of the heating zone.

[0059] It should be noted that: Collecting the temperature information of the billets in any two adjacent heating zones by an infrared pyrometer and collecting the actual temperature information of two adjacent heating zones by a thermocouple specifically includes:

[0060] Collect the billet inlet temperature by an infrared pyrometer. Then, when calculating the billet temperature in each heating zone, calculate the average value of the inlet temperatures of 6 billets in this heating zone as the billet temperature information of this heating zone.

[0061] As Figure 2 shown, there are 6 billets numbered 1-6 in the first heating zone. The billet temperature information in the first heating zone is the average value of the inlet temperatures of the billets numbered 1-6.

[0062] In one embodiment, in step S3, determining whether the actual temperature t of the heating zone is greater than the preset temperature includes the following steps:

[0063] S31 Determine whether the actual temperature t of the heating zone is greater than the preset temperature T1;

[0064] If t < T1, the burner burns for the first 60s and exhausts smoke for the next 60s, and the burner works continuously according to this rule;

[0065] S32 As the temperature rises, if T1 < t < T2, where T2 is the upper limit temperature, the burner burns within the first 35s, then the burner stops working for 25s, the burner exhausts smoke for the next 35s, and then the burner stops working for 25s;

[0066] S33 Continue to judge the range of t. If T1 < t < T2, the burner burns within the first 10s, then the burner stops working for 50s, the burner exhausts smoke for the next 10s, and then the burner stops working for 50s, and continues to work according to this rule;

[0067] S34 As the temperature continues to rise, if t > T2, the burner stops working;

[0068] S35 As the temperature begins to decrease, if T1 < t < T2, step S33;

[0069] S36 As the temperature continues to decrease, if t < T1, the burner burns within the first 35s, then the burner stops working for 25s, the burner exhausts smoke for the next 35s, and then the burner stops working for 25s. Continue to judge t. If t < T1, execute S31;

[0070] Among them, when the burner burns, b i = 1; when the burner exhausts smoke or does not work, b i = 0.

[0071] Among them, T1 = 1000°C and T2 = 1015°C.

[0072] The purpose of steps S31 - S36 is to shorten the working time and reduce the thermal load of the device through multi - stage heating before the actual temperature in the heating zone reaches the over - temperature range. When the actual temperature in the heating zone exceeds the limit temperature, combustion stops, and heating is carried out using the residual heat generated previously.

[0073] The specific process is as follows: When the actual temperature in the heating zone is lower than the set temperature, the burner continuously burns to ensure the continuous heating load of the heating zone; when the actual temperature in the heating zone reaches the set temperature and within an appropriate over - temperature range acceptable to the billet heating process requirements, the working time is gradually shortened in two stages to reduce the thermal load and ensure the stability of the furnace temperature, so that the furnace temperature does not rise or fall suddenly; when the actual temperature in the heating zone exceeds the limit temperature, the combustion work stops in a timely manner, which can ensure the effective execution of the command of the set temperature, prevent the billet from being burned due to over - temperature, further ensure the accuracy of the furnace temperature control, and save energy consumption.

[0074] The whole process strictly follows the balance of the working time of combustion and smoke exhaust, ensuring that the smoke exhaust temperature of the burners on both sides does not exceed the temperature limit, effectively protecting the equipment.

[0075] In another embodiment, in step S3, determining whether the actual temperature t of the heating zone is greater than the preset temperature includes the following steps:

[0076] S31’ Determine whether the actual temperature t of the heating zone is greater than the upper limit temperature T2’;

[0077] If T2’ < t, the burner stops working;

[0078] S32’ As the temperature decreases, when t drops to T1’, the burner burns for the first 60 s and exhausts smoke for the next 60 s, working according to this rule;

[0079] S33’ As the temperature rises, if T1’ < t < T2’, the burner burns for the first 60 s and exhausts smoke for the next 60 s, working according to this rule;

[0080] Among them, when the burner burns, b i = 1; when the burner exhausts smoke or does not work, b i = 0.

[0081] Among them, T1’ = 990 °C, T2’ = 1000 °C.

[0082] The purpose of steps S31’ - S33’ is that when the actual temperature in the heating zone is lower than the upper limit temperature of the set temperature, the burner continuously burns; when the actual temperature in the heating zone exceeds the upper limit temperature, the burner stops working; after the burner stops working, when the actual temperature in the heating zone is lower than the lower limit temperature, the burner restarts and continuously burns, working according to this rule continuously.

[0083] The entire process control logic is simple and convenient for debugging, and is applicable to the control of most reheating furnaces. When the actual temperature in the heating zone exceeds the limit temperature, the combustion work is stopped in a timely manner, which can ensure the effective execution of the command of the set temperature, prevent the steel billet from being burned out due to overheating, and can save energy consumption. The actual temperature in the heating zone basically fluctuates between the upper limit temperature and the lower limit temperature of the set temperature, and the temperature control range is relatively accurate, which can ensure that the steel billet is heated within a small temperature fluctuation range and ensure the stability of the steel billet heating process.

[0084] A control system for implementing a control method of a pulse reheating furnace, which includes:

[0085] An acquisition module, which is used to acquire the steel billet temperature information and the actual temperature information in the heating zone;

[0086] A judgment module, which is electrically connected to the acquisition module and is used to receive the actual temperature information in the heating zone acquired by the acquisition module, judge whether the actual temperature information in the heating zone is greater than the preset temperature, and obtain the b i value;

[0087] A database, which internally includes the load coefficient a of the burner corresponding to the steel billet temperature information i and the rated power flow x of the burner i ;

[0088] A control system, which is electrically connected to the acquisition module, the judgment module, and the database, and is used to receive the b i value from the judgment module, receive the steel billet temperature information in the heating zone of the acquisition module, and call the load coefficient a of the burner corresponding to the steel billet temperature information in the database according to the steel billet temperature information i , call the rated power flow x of the corresponding burner in the database i , and calculate the predetermined gas input amount Q1;

[0089] A gas regulating valve, which is electrically connected to the control system and is used to adjust the opening of the gas regulating valve according to the predetermined gas input amount Q1 calculated by the control system, so that the actual gas input amount Q2 is equal to the predetermined gas input amount Q1 in the heating zone.

[0090] Embodiment 1

[0091] S1 Acquire the steel billet temperature in Heating Zone 1 as 450 °C, the steel billet temperature in Heating Zone 2 as 425 °C, and acquire the actual temperature in Heating Zone 1 as 925 °C and the actual temperature in Heating Zone 2 as 1025 °C;

[0092] S2 According to the billet temperature of 450°C, the burner load coefficients of the first heating zone are obtained by calling the database: a1 = 0.33, a2 = 0.33, a3 = 0.33; according to the billet temperature of 425°C, the burner load coefficients of the second heating zone are obtained by calling the database: a4 = 0.40, a5 = 0.40, a6 = 0.40;

[0093] S3 The actual temperature t of the first heating zone is 925°C, which is less than the preset temperature of 950°C. According to the judgment result, the opening and closing states of the burners in the first heating zone are b 1＝ 1, b 2＝ 1, b 3＝ 1; the actual temperature t of the second heating zone is 1025°C, which is greater than the preset temperature of 1000°C. According to the judgment result, the opening and closing states of the burners in the first heating zone are b 4＝ 0, b 5＝ 0, b 6＝ 0;

[0094] S4 Call the rated power flow x of each burner in the first heating zone in the database 1＝ 3950m 3 / h, x 2＝ 3950m 3 / h, x 3＝ 3950m 3 / h; call the rated power flow x of each burner in the second heating zone in the database 4＝ 3950m 3 / h, x 5＝ 3950m 3 / h, x 6＝ 1975m 3 / h;

[0095] S5 Calculate the required predetermined gas input Q1 for the first heating zone and the second heating zone at this time;

[0096] Among them, Q1 = a1x1b1 + a2x2b2 +... + a n x n b n

[0097] = 0.33 * 3950 * 1 + 0.33 * 3950 * 1 + 0.33 * 3950 * 1 + 0.40 * 3950 * 0 + 0.40 * 3950 * 0 + 0.40 * 1975 * 0 = 3910.5m 3 / h

[0098] S6 According to the calculated predetermined gas input Q1 = 3910.5m 3 / h, adjust the gas regulating valves in Heating Zone 1 and Heating Zone 2 so that the actual gas input Q2 equals the predetermined gas input Q1 = 3910.5 m 3 / h.

[0099] Example 2

[0100] S1 Collect the billet temperature in Heating Zone 3 as 52 °C, the billet temperature in Heating Zone 4 as 60 °C, the actual temperature in Heating Zone 3 as 1113 °C, and the actual temperature in Heating Zone 4 as 1152 °C;

[0101] S2 According to the billet temperature of 52 °C, call the database to obtain the burner load coefficients a of each burner in Heating Zone 3 1＝ 0.70, a 2＝ 0.70, a 3＝ 0.70; According to the billet temperature of 60 °C, call the database to obtain the burner load coefficients a of each burner in Heating Zone 4 4＝ 0.75, a 5＝ 0.75, a 6＝ 0.75;

[0102] S3 The actual temperature t = 1113 °C in Heating Zone 3 is less than the preset temperature of 1140 °C. According to the judgment result, obtain the opening and closing states of each burner in Heating Zone 3 at this time as b 1＝ 1, b 2＝ 1, b 3＝ 1; The actual temperature t = 1152 °C in Heating Zone 4 is less than the preset temperature of 1165 °C. According to the judgment result, obtain the opening and closing states of each burner in Heating Zone 4 at this time as b 4＝ 1, b 5＝ 1, b 6＝ 1;

[0103] S4 Call the rated power flow x of each burner in Heating Zone 3 in the database 1＝ 3950 m 3 / h, x 2＝ 3950 m 3 / h, x 3＝ 3950 m 3 / h; Call the rated power flow x of each burner in Heating Zone 4 in the database 4＝ 3950 m 3 / h, x 5＝ 3950 m 3 / h, x 6＝ 3950 m 3 / h;

[0104] S5 Calculate the predetermined gas input Q1 required for Heating Zone 3 and Heating Zone 4;

[0105] Among them, Q1 = a1x1b1 + a2x2b2 +... + a n x n b n

[0106] = 0.70 * 3950 * 1 + 0.70 * 3950 * 1 + 0.70 * 3950 * 1 + 0.75 * 3950 * 1 + 0.75 * 3950 * 1 + 0.75 * 1975 * 1 = 15701.25 m 3 / h

[0107] S6 According to the calculated predetermined gas input Q1 = 15701.25 m 3 / h, adjust the gas regulating valves in heating zones three and four so that the actual gas input Q2 is equal to the predetermined gas input Q1 = 15701.25 m 3 / h.

[0108] Example 3

[0109] Judging whether the actual temperature t in the heating zone is greater than the preset temperature includes the following steps:

[0110] S31 Judge whether the actual temperature t in heating zone one is greater than the preset temperature of 1000 °C;

[0111] If it is collected that t = 900 < 1000 °C, the burner burns for the first 60 s and exhausts smoke for the next 60 s, and the burner works continuously according to this rule;

[0112] S32 As the temperature rises, if 1000 °C < t = 1005 < 1015 °C, the burner burns within the first 35 s, then the burner stops working for 25 s, the burner exhausts smoke for the next 35 s, and then the burner stops working for 25 s. After completing this process;

[0113] S33 As the temperature continues to rise, continue to judge the range of t. If 1000 °C < 1010 < 1015 °C, the burner burns within the first 10 s, then the burner stops working for 50 s, the burner exhausts smoke for the next 10 s, and then the burner stops working for 50 s, and continues to work according to this rule;

[0114] S34 As the temperature continues to rise, if 1015 °C < t = 1016, the burner stops working;

[0115] S35 As the temperature begins to drop, if 1000 °C < t = 1010 < 1015 °C, step S33;

[0116] S36 As the temperature continues to drop, if t = 980 < 1000 °C, the burner burns within the first 35 s, then the burner stops working for 25 s, the burner exhausts smoke for the next 35 s, and then the burner stops working for 25 s. Continue to judge t. If 990 < t = 1000 °C, execute S31;

[0117] Among them, the actual temperature t in the heating zone is a continuously changing process. Therefore, at any moment, the state of the burner is also constantly changing, resulting in b during the heating process n constantly changing. The predetermined gas input Q1 calculated in step S5 is the predetermined gas input at a certain moment.

[0118] Embodiment 4

[0119] Judging whether the actual temperature t in the heating zone is greater than the preset temperature includes the following steps:

[0120] S31’ Judge whether the actual temperature t in the first heating zone is greater than the upper limit temperature of 1000 °C;

[0121] If 1000 °C < t = 1010, the burner stops working;

[0122] S32’ The temperature drops. When t drops to 990 °C, the burner burns for the first 60 s and exhausts smoke for the next 60 s, and works according to this rule;

[0123] S33’ The temperature rises. If 990 °C < t = 995 < 1000 °C, the burner burns for the first 60 s and exhausts smoke for the next 60 s, and works according to this rule;

[0124] Among them, the actual temperature t in the heating zone is a continuously changing process. Therefore, at any moment, the state of the burner is also constantly changing, resulting in b during the heating process n constantly changing. The predetermined gas input Q1 calculated in step S5 is the predetermined gas input at a certain moment.

[0125] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the article or device including the elements.

[0126] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. The present invention has only been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all should be covered within the scope of the claims of the present invention.

Claims

1. A control method for a pulse heating furnace, characterized in that, The control method of the pulse heating furnace specifically includes the following: S1 Collect the billet temperature information and the actual temperature information of any two adjacent heating zones; S2 obtains the burner load coefficient a of the heating zone according to the billet temperature information i ; S3 determines whether the actual temperature t of the heating zone is greater than the preset temperature. According to the judgment result, the opening and closing states b of each burner are obtained i , where b i = 0 for closed, b i = 1 for open; S4 calls the rated power flow x of each burner in the heating zone described in the database i ; S5 Calculate the required predetermined gas input Q1 for two adjacent heating zones; Among them, Q1 The predetermined gas input for two adjacent heating zones, a i Load factor of the burner x i Rated power flow of the burner b i Opening and closing state of the burner S6 According to the calculated predetermined gas input Q1, adjust the gas regulating valve of the heating zone so that the actual gas input Q2 is equal to the predetermined gas input Q1 of the heating zone; The burner load factor a in step S2 i is the burner load factor measured through experiments at different billet temperatures to enable the heating zone to reach the normal operating temperature, thereby avoiding waste of burner energy.

2. The control method of the pulse heating furnace according to claim 1, characterized in that, Collect the actual temperature information of the heating zone through a thermocouple; Collect the billet temperature information of the heating zone through an infrared pyrometer.

3. The control method of the pulse heating furnace according to claim 1, characterized in that, In step S3, determining whether the actual temperature t of the heating zone is greater than the preset temperature includes the following steps: S31 Determine whether the actual temperature t of the heating zone is greater than the preset temperature T1; If t < T1, the burner burns for the first 60 s and exhausts smoke for the next 60 s, and the burner works continuously according to this rule; S32 As the temperature rises, if T1 < t < T2, where T2 is the upper limit temperature, the burner burns for the first 35 s, then the burner stops working for 25 s, the burner exhausts smoke for the next 35 s, and then the burner stops working for 25 s; S33 Continue to judge the range of t. If T1 < t < T2, the burner burns for the first 10 s, then the burner stops working for 50 s, the burner exhausts smoke for the next 10 s, and then the burner stops working for 50 s, and continues to work according to this rule; S34 As the temperature continues to rise, if T2 < t, the burner stops working; S35 As the temperature begins to decrease, if T1 < t < T2, step S33; S36 As the temperature continues to decrease, if t < T1, the burner burns for the first 35 s, then the burner stops working for 25 s, the burner exhausts smoke for the next 35 s, and then the burner stops working for 25 s. Continue to judge t. If t < T1, execute S31; Among them, the burner burns, b i = 1; when the burner exhausts or does not work, b i = 0.

4. The control method of the pulse heating furnace according to claim 3, characterized in that, T1 = 1000 °C, T2 = 1015 °C.

5. The control method of the pulse heating furnace according to claim 1, characterized in that, In step S3, determining whether the actual temperature t of the heating zone is greater than the preset temperature includes the following steps: S31’ Determine whether the actual temperature t of the heating zone is greater than the upper limit temperature T2’; If T2’ < t, the burner stops working; S32’ As the temperature decreases, when t decreases to T1’, the burner burns for the first 60 s and exhausts smoke for the next 60 s, and works according to this rule; S33’ As the temperature rises, if T1’ < t < T2’, the burner burns for the first 60 s and exhausts smoke for the next 60 s, and works according to this rule; Among them, the burner burns, b i = 1; when the burner exhausts or does not work, b i = 0.

6. The control method of the pulse heating furnace according to claim 5, characterized in that, T1’ = 990 °C, T2’ = 1000 °C.

7. A control system for implementing the control method of the pulse heating furnace of claim 1, characterized in that, Includes: A collection module for collecting the billet temperature information and the actual temperature information of the heating zone; A judgment module, electrically connected to the acquisition module, is configured to receive the actual temperature information of the heating zone collected by the acquisition module, determine whether the actual temperature information of the heating zone is greater than a preset temperature, and obtain a b i value; Database, which internally includes the load factor a of the burner corresponding to the billet temperature information i and the rated power flow x of the burner i ; The control system is electrically connected to the acquisition module, the judgment module, and the database, and is configured to receive the b value from the judgment module, receive the billet temperature information in the heating zone of the acquisition module, and call the load coefficient a of the burner corresponding to the billet temperature information in the database i , call the rated power flow x of the corresponding burner in the database i , and calculate the predetermined gas input amount Q1; i ​ A gas regulating valve, electrically connected to the control system, for adjusting the opening of the gas regulating valve according to the predetermined gas input Q1 calculated by the control system, so that the actual gas input Q2 is equal to the predetermined gas input Q1 of the heating zone.

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