Smelting furnace control system for rubber product processing

Abstract

The invention discloses a smelting furnace control system for rubber product processing, and relates to the technical field of rubber product production control. The main problems that in existing production, data support for active adjustment is lacked in temperature control of a rubber product kiln, and the optimal air-fuel ratio cannot be determined so that the combustion efficiency can be guaranteed, and meanwhile the content ratio of smoke components can be within a set interval can be solved. According to the method, the corresponding fuel gas change amount and the combustion-supporting air change amount are accurately calculated through the temperature difference between the actually measured temperature at the bottom of the pool and the temperature expected threshold value interval in combination with the volume fraction of each alkane component in the fuel gas and the kiln efficiency, so that data support is provided for adjustment and control, and energy waste is avoided; smoke components are analyzed through the smoke parameter feedback module, whether combustion air is insufficient or excessive is judged, the result is fed back to the fuel input control module to adjust the air-fuel ratio, the operation is repeated for multiple times, and accurate derivation of the optimal air-fuel ratio is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber product production control, and particularly to a furnace control system for rubber product processing. Background Art

[0002] In the production process of rubber products, as one of the key equipment, the stability of the temperature, pressure and atmosphere parameters of the kiln directly affects the quality of the rubber product liquid and the subsequent forming effect.

[0003] In the existing rubber product kiln during the production process, due to different reaction temperatures, pressure conditions and atmosphere compositions, etc., it will cause changes in the subsequent product quality and the content of each component in the flue gas composition (including NO X , CO, CO2). However, at this time, if feedback adjustment control is carried out according to the corresponding data, it will cause a great time lag, which has little significance for production guidance and causes a large amount of production waste. Therefore, in actual production control, it mainly relies on manual experience values for operation; this control method still has problems of unreasonable parameters and reaction lag, which have a negative impact on the kiln life, product quality and flue gas post-treatment. For this reason, we provide a furnace control system for rubber product processing. Summary of the Invention

[0004] The purpose of the present invention is to provide a furnace control system for rubber product processing.

[0005] The technical problems solved by the present invention are as follows:

[0006] (1) How to accurately calculate the gas change amount and combustion-supporting air change amount corresponding to changing a certain temperature difference of a certain volume of rubber product liquid by combining the temperature difference between the actually measured temperature at the bottom of the pool and the temperature expected threshold range, the volume fraction of each alkane component in the gas and the furnace efficiency, so as to solve the problem that in the prior art, only passive temperature measurement can be used to roughly control the gas volume and combustion-supporting air volume, lacking data support and causing energy waste;

[0007] (2) How to analyze the flue gas composition through the flue gas parameter feedback module, and combine the content of different gas components to judge whether the combustion-supporting air is lacking or excessive, and feedback the result to the fuel input control module to adjust the air-fuel ratio, and perform multiple reciprocations to obtain the optimal air-fuel ratio, so as to solve the problems of incomplete combustion or increased NO x content caused by an inappropriate air-fuel ratio in the prior art;

[0008] (3) How to guide the ammonia injection amount of the flue gas denitrification treatment module through the flue gas parameter feedback module, so as to solve the problem of time lag in the control of the ammonia injection amount in the prior art.

[0009] The present invention can be implemented through the following technical solutions: A furnace control system for rubber product processing, comprising:

[0010] A production environment perception module, which is used to collect temperature at multiple positions of the crown and the bottom of the melting part, collect liquid surface pressure data at the longitudinal section position of the temperature collection point, and also monitor the liquid level height of the rubber product liquid in real time. The production environment perception module sends the collected data to the production data storage module;

[0011] A production data processing module, which is used to process the data collected by the production environment perception module within a certain time period, construct temperature change curves of the bottom of the pool and the crown with time series characteristics and a liquid surface air pressure change curve, and compare the temperature change curve of the bottom of the pool with the temperature expected threshold line to obtain the subcooling temperature difference or the overheating temperature difference;

[0012] A fuel input control module, which is used to control the flow rate of the heat production raw materials that generate the above two temperature differences, adjust its gas volume and combustion-supporting air volume, so as to control the generation of heat;

[0013] A flue gas parameter feedback module, which is used to analyze the composition of the flue gas generated by the combustion reaction, obtain the CO content ratio and the NO x content ratio. According to the change of the content ratio of the two, it judges whether the combustion-supporting air is lacking or excessive, and thus sends a corresponding instruction to the fuel input control module to adjust the air-fuel ratio;

[0014] The flue gas parameter feedback module and the fuel input control module perform multiple feedback regulations to obtain the optimal air-fuel ratio.

[0015] A further technical improvement of the present invention is that: the production data processing module sets a temperature expected threshold line in the coordinate system of the temperature change curve of the bottom of the pool. When the real-time temperature value at the current moment is outside the temperature expected threshold line, the subcooling temperature difference or the overheating temperature difference is calculated, and a corresponding heating instruction or cooling instruction is generated and transmitted to the fuel control module;

[0016] When the real-time temperature value at the current moment is within the temperature expected threshold line, calculate the average change slope of the temperature curve segment in the latest time period. When When, a warning of too fast heating is generated; when When, a warning of too fast cooling is generated; and respectively predict the time t 上 or t 下 to reach the upper and lower lines of the temperature expected threshold according to the current average change slope k. Here, k0 is the change rate limit value; the warning signal and the corresponding time t 上 or t 下 to reach the upper and lower lines of the temperature expected threshold are sent to the fuel input control module.

[0017] A further technical improvement of the present invention lies in that: the fuel input control module changes the temperature of the rubber product liquid by adjusting the gas quantity and the combustion-supporting air quantity, and the determination process of the gas quantity and the combustion-supporting air quantity includes:

[0018] S1: Determine the air-fuel ratio according to the alkane combustion reaction equation and the volume fractions of different components in the gas. Where a1, a2...a n Are the volume fractions of each alkane component in the gas;

[0019] S2: Determine the corresponding gas combustion energy required for a certain volume of rubber product liquid to change a certain temperature difference, then E·η = ρV 邻 cΔT, where E represents the energy generated by gas combustion, η is the thermal efficiency of the kiln, ρ represents the density of the rubber product liquid, V 邻 Represents the volume of the rubber product liquid in the heat radiation space, c represents the specific heat capacity of the rubber product liquid, and ΔT represents the temperature value of the change in the temperature of the rubber product liquid;

[0020] S3: Determine the corresponding gas quantity Q that generates the gas combustion energy E according to the combustion calorific values of different components and the volume fractions of different components in the gas components, that is Where 1 ≤ j ≤ n, q j Represents the combustion calorific value of the jth type of alkane;

[0021] S4: Determine the combustion-supporting air quantity αQ according to the air-fuel ratio α and the gas quantity Q.

[0022] A further technical improvement of the present invention lies in that: the flue gas parameter feedback module constructs multiple flue gas component-time relationship curves according to the flue gas component analysis results, and observes whether there are effective distortion points in the time interval (t 改 , t 改 +2Δt) in the flue gas component-time relationship curve, where t 改 Is the moment when the gas quantity and the combustion-supporting air quantity change, and Δt is the maximum response delay of the flue gas component analyzer;

[0023] When the curve representing the CO content ratio appears an effective distortion point, it indicates that the combustion-supporting air quantity is insufficient, and a combustion-supporting air supplement instruction is generated;

[0024] When the curve representing the NO x Content ratio appears an effective distortion point, it indicates that the combustion-supporting air quantity is excessive, and a combustion-supporting air excess instruction is generated;

[0025] After receiving the combustion-supporting air supplement instruction or the combustion-supporting air excess instruction, the fuel input control module controls the opening degree of the combustion-supporting air inlet valve to increase or decrease correspondingly, and the valve opening degree adjustment proportional coefficient is set to 5% each time.

[0026] A further technical improvement of the present invention lies in that: after multiple feedback regulations, the fuel input control module obtains the optimal air-fuel ratio, binds the optimal air-fuel ratio, the corresponding gas volume, and the temperatures of the bottom and crown of the pool and the liquid surface air pressure to obtain an empirical data set, and constructs a knowledge base. When the gas volume and the combustion-supporting air volume are changed subsequently, the air-fuel ratio is obtained by matching according to the closest temperature, air pressure, and gas volume parameters, reducing the number of subsequent feedback regulations.

[0027] A further technical improvement of the present invention lies in that: the production data processing module also obtains the moment t when the bottom temperature of the pool reaches the median value of the temperature expectation threshold according to the bottom temperature change curve at the corresponding position. 中 , and is defined as the temperature compensation time delay coefficient;

[0028] When the fuel input control module receives a warning signal of too fast temperature rise or too fast temperature drop, or is subjected to a ratio operation with the temperature compensation time delay coefficient to obtain a compensated temperature difference, and the gas combustion energy to be changed is determined according to the compensated temperature difference, and then the gas volume and the combustion-supporting air volume are determined.

[0029] A further technical improvement of the present invention lies in that: the heat radiation space described in step S3 refers to the volume space within a certain neighborhood range at the cross-sectional position where the fuel inlet and the combustion-supporting air inlet are located.

[0030] The effective distortion point is a distortion point generated when the corresponding flue gas composition changes sharply beyond the set interval and this point satisfies that the subsequent curve trend still extends outside the set interval.

[0031] A further technical improvement of the present invention lies in that: it further includes a flue gas denitrification treatment module, which acquires the flue gas composition and calculates the total time from the generation of the flue gas to the arrival at the flue gas denitrification treatment module according to the pipeline length and the average flow velocity of the flue gas in each section, so as to determine the moment when the corresponding change in the ammonia injection volume is made.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. By calculating the temperature difference between the actually measured temperature of the bottom of the pool and the temperature expectation threshold range, and combining the volume fractions of each alkane component in the gas and the furnace efficiency, the present invention accurately calculates the gas change amount and the combustion-supporting air change amount corresponding to changing this temperature difference for a certain volume of rubber product liquid, thereby providing data support for the change of the gas volume and the combustion-supporting air volume, realizing the precise control of the two, and further avoiding the waste of energy.

[0034] 2. The present invention analyzes the flue gas composition through the flue gas parameter feedback module, and combines the content of different gas components to determine whether the combustion-supporting air is lacking or excessive. The result is fed back to the fuel input control module to adjust the air-fuel ratio, and this process is repeated multiple times to obtain the optimal air-fuel ratio, avoiding the problems of incomplete combustion or increased NO x content increase caused by an inappropriate air-fuel ratio, which increases the difficulty of flue gas treatment or the consumption of resources.

[0035] 3. The present invention binds the air-fuel ratio α obtained after multiple feedbacks with the temperature and liquid surface pressure at the corresponding position to generate an empirical data set and stores it in the production data storage module, thereby constructing a knowledge base based on this. So that the subsequent fuel input control module can directly obtain the air-fuel ratio matched in the knowledge base, thereby reducing the number of subsequent feedback adjustments, improving the control adjustment efficiency, and reducing energy consumption.

[0036] 4. The present invention guides the ammonia injection amount of the flue gas denitrification treatment module through the flue gas parameter feedback module, enabling the ammonia injection amount of the flue gas denitrification treatment module to be accurately adjusted in real time according to the flue gas composition, avoiding the problem of excessive or insufficient ammonia water consumption caused by time lag. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0038] Figure 1 It is the system block diagram of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0039] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will describe in detail the specific implementation manners, structures, features, and effects of the present invention with reference to the accompanying drawings and preferred embodiments.

[0040] Please refer to Figure 1 shown, a furnace control system for rubber product processing includes a production environment perception module, a fuel input control module, a flue gas parameter feedback module, a production data storage module, a production data processing module, and a flue gas denitrification treatment module.

[0041] The production environment perception module is used to collect real-time temperature data of the crown and the bottom of the melting part, and at the same time measure the air pressure above the liquid surface of the rubber product liquid;

[0042] Since the melting of rubber products in the melting part is an endothermic melting process, the temperature is not the same in the flow direction of the rubber product liquid. The sensitivity of pressure to temperature determines that the pressure will also change. Therefore, temperature sensors and pressure sensors are arranged at multiple cross-sectional positions in the melting part to sense temperature and pressure;

[0043] The production environment perception module numbers the temperature sensors distributed at the crown and the bottom of the tank and the pressure sensors at the corresponding cross-section positions of the liquid level of the rubber product. Then, at the i-th monitoring position, the data collected by the crown temperature sensor, the bottom temperature sensor, and the pressure sensor are W i 、W i ', and Y i , respectively, and stores them in the production data storage module according to the time series characteristics. In addition, the production environment perception module also monitors the liquid level height of the rubber product in real time;

[0044] The production data processing module accesses the production data storage module at a certain time period to obtain the environment perception data updated at the latest time. This time period is set to (30s or 60s). It constructs a plane rectangular coordinate system with time as the abscissa and the collected value as the ordinate for the time series data of each sensor, and then respectively draws the crown temperature change curve, the bottom temperature change curve, and the liquid surface air pressure change curve for the monitoring position;

[0045] In the coordinate system of the bottom temperature change curve, a temperature expectation threshold line is set, and it is compared whether the real-time temperature value at this monitoring position is within the temperature expectation threshold line interval. When the temperature is lower than the lowest temperature expectation threshold, calculate the temperature difference between the current temperature and the median of the temperature expectation threshold, and mark it as the supercooling temperature difference, and generate a heating instruction to transmit to the fuel input control module; when the temperature is higher than the highest temperature expectation threshold, calculate the temperature difference between the current temperature and the median of the temperature expectation threshold, and mark it as the overheating temperature difference, and generate a cooling instruction to transmit to the fuel input control module;

[0046] Furthermore, when the real-time temperature value is within the temperature expectation threshold line interval, calculate the average change slope k of the temperature curve segment in this latest time period. When , generate a warning of too fast heating; when , generate a warning of too fast cooling; and respectively simulate and predict the time t 上 and t 下 to reach the upper and lower limits of the temperature expectation according to the current average change slope k. The above k0 is the change rate limit value;

[0047] The fuel input control module includes the fuel inlet and the combustion-supporting air inlet arranged in the furnace. To ensure the full combustion of the fuel, sufficient oxygen supply is required. However, excessive oxygen supply will cause the generation of NO X to be unable to be effectively controlled, resulting in waste of resources for subsequent tail gas treatment, and it is also not conducive to the full combustion of the fuel;

[0048] To protect the ecological environment, the kilns in the existing technology generally use natural gas as the gas fuel to reduce environmental pollution; the main component of natural gas is alkane, among which methane accounts for the vast majority, with a proportion of more than 80%;

[0049] According to the general combustion reaction formula of alkane gases and oxygen, C n H 2n+2 +(3n + 1) / 2O2 → nCO2 + (n + 1)H2O, it can be known that under the same volume fraction, methane consumes the least amount of oxygen during combustion; assume that the volume fractions of each alkane component in the natural gas used as fuel in the present invention are a1, a2... a n , where the subscript of the volume fraction represents the number of carbon atoms, then for a certain volume flow rate Q 燃 of natural gas, the theoretical calculated amount Q 氧 of the required oxygen is expressed as

[0050] Since the main components of air are oxygen and nitrogen, and the ratio of their molecular numbers is 78:21, the theoretical calculated amount of oxygen is converted to the theoretical calculated amount of air Q 空 = Q 氧 / 0.21;

[0051] That is, when the gas flow rate is Q 燃 , the theoretical calculated amount of the corresponding required air is αQ 燃 , where represents the α air-fuel ratio;

[0052] The gas input control module demarcates a corresponding heat radiation space within a certain neighborhood range (which can be set to 3m) at the positions of the fuel inlet and the combustion-supporting air inlet. According to the liquid level height of the rubber product liquid and the cross-sectional dimension data of the kiln at the corresponding position, the volume of the rubber product liquid in the heat radiation space can be calculated. Then, according to the heat effect formula, E·η = mcΔT = ρV 邻 cΔT;

[0053] Among them, E represents the energy generated by gas combustion, η is the thermal efficiency of the kiln, generally taking values between 30% and 40%, and the longer the usage time, the smaller the thermal efficiency; ρ represents the density of the rubber product liquid, taking values in 2.4×1000 kg / m 3 ~ 2.6×1000 kg / m 3 , and since the volume of the rubber product production material increases and the density decreases during the melting process, the density of the rubber product liquid closer to the material feeding end takes a relatively larger value; V 邻 represents the volume of the rubber product liquid in the corresponding heat radiation space, c represents the specific heat capacity of the rubber product liquid, and ΔT represents the temperature change value of the rubber product liquid;

[0054] After the fuel input control module receives the temperature increase instruction and the supercooling temperature difference, it substitutes the volume of the rubber product liquid and the supercooling temperature difference in the neighborhood where the monitoring position is located into the formula E·η = ρV 邻In cΔT, the combustion energy E of the fuel gas to be supplemented is obtained accordingly;

[0055] Similarly, after the fuel input control module receives the temperature reduction instruction and the overheat temperature difference, the liquid volume of the rubber product in the neighborhood where the monitoring position is located and the overheat temperature difference are substituted into the formula E·η = ρV 邻 In cΔT, the combustion energy E of the fuel gas to be reduced is obtained accordingly;

[0056] Calculate the fuel gas flow rate Q corresponding to the combustion energy E generated under the fully combusted state of the fuel gas. The calorific values of different alkanes in the fuel gas are determined, and q1, q2...q are set respectively n Then the following formula can be constructed: where 1 ≤ j ≤ n;

[0057] When the fuel input control module receives the temperature increase instruction / temperature reduction instruction, by controlling the opening degree of the fuel inlet valve, the fuel gas amount entering the kiln through the fuel inlet within a certain time is increased by Q or decreased by Q. At the same time, the combustion-supporting air inlet also increases or decreases by the corresponding amount αQ;

[0058] Furthermore, the production data processing module obtains the moment t when the bottom temperature of the pool reaches the median of the temperature expectation threshold according to the continuously collected corresponding temperature data 中 and calculates the difference between this moment and the moment t when the fuel gas amount and the combustion-supporting air amount change 改 The difference between the two moments is defined as the temperature compensation time delay. The temperature compensation time delay is divided by the undercooling temperature difference or the overheat temperature difference to obtain the latest temperature compensation time delay coefficient at the cross-section position of the kiln;

[0059] When the fuel input control module receives the early warning signal of too fast temperature increase or too fast temperature reduction, or is divided by the temperature compensation time delay coefficient to obtain the compensation temperature difference. The compensation temperature difference is processed in the same way as the above-mentioned overheat temperature difference / undercooling temperature difference, and then the opening degrees of the fuel inlet valve and the combustion-supporting air inlet valve are controlled. t0 represents the moment when the warning signal is generated.

[0060] Furthermore, since the mixing uniformity of the fuel gas and the combustion-supporting air and the sealing performance of the kiln will affect the combustion sufficiency, generally an excessive injection method is adopted when injecting the combustion-supporting air to ensure that the fuel gas can be fully combusted. However, the excessive combustion-supporting air is likely to generate NO X and other gases at high temperatures;

[0061] The flue gas parameter feedback module includes multiple flue gas composition analyzers installed at the fuel inlet and the combustion air inlet. The flue gas generated at a certain location in the kiln is extracted, its composition is analyzed, and then it is returned to the kiln to construct a flue gas composition-time relationship curve. After the flue gas composition analyzer analyzes the extracted flue gas sample, the analysis results are used to update the data of multiple flue gas composition-time relationship curves according to different components. In the multiple flue gas composition-time relationship curves, observe whether there are distortion points in the curve segment within the observation time interval (t 改 ,t 改 +2Δt), and whether the subsequent curve trend of the distortion point extends stably starting from the distortion point. If so, the distortion point is defined as an effective distortion point, where Δt is the maximum response delay of the flue gas composition analyzer;

[0062] When there is an effective distortion point in the curve representing the CO content ratio, that is, the CO content ratio suddenly increases, it indicates that the amount of combustion air is insufficient, and a combustion air supplement instruction is generated;

[0063] When there is an effective distortion point in the curve representing the NO x content ratio, that is, the NO x content ratio suddenly increases, it indicates that the amount of combustion air is excessive, and a combustion air excess instruction is generated;

[0064] The flue gas parameter feedback module directly feeds back and transmits the generated instruction to the fuel input control module. When the fuel input control module receives the combustion air supplement instruction or the combustion air excess instruction, it correspondingly increases or decreases the opening of the combustion air inlet valve, and the adjustment ratio coefficient of the valve opening is set to 5% each time; The instruction feedback of the above flue gas parameter feedback module can be carried out multiple times until the content of the corresponding gas component after the generation of the effective distortion point returns to the set interval. It should be noted that the upper and lower limits of this set interval are positively correlated with the amount of gas entering the kiln.

[0065] The fuel input control module binds the air-fuel ratio α obtained after multiple feedbacks under the corresponding gas volume state with the temperature and liquid surface air pressure at the corresponding position to generate an empirical data set and stores it in the production data storage module, thereby constructing a knowledge base based on this. When it is necessary to inject gas volume and combustion air later, the air-fuel ratio is obtained by matching the environmental parameters and gas parameters closest to it in the knowledge base, so as to reduce the number of subsequent feedback adjustments.

[0066] Furthermore, the flue gas parameter feedback module also feeds back the gas component content of the flue gas to the subsequent flue gas denitration treatment module. The flue gas denitration treatment module calculates the total time Δt from the generation of the flue gas to its arrival at the flue gas denitration treatment module according to the lengths and average flow velocities of each section of the flue gas transmission pipeline 烟 ,Generally speaking, Δt 烟 >Δt;

[0067] The moment when the ammonia injection amount of the flue gas denitration treatment module is changed is set as t 改 +Δt 烟 -Δt, thereby preventing air pollution caused by the inability to adjust the ammonia injection amount in a timely manner after the gas components change due to the change of the air-fuel ratio, and also making the ammonia injection amount more accurate to a certain extent, saving resources and reducing production costs.

[0068] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A furnace control system for rubber product processing, characterized in that, Including: A production environment perception module, which is used to collect temperature data at multiple positions on the crown and bottom of the melting section, collect liquid level pressure data at the longitudinal section position of the temperature collection point, and also monitor the liquid level height of the rubber product liquid in real time. The production environment perception module sends the collected data to the production data storage module; A production data processing module, which is used to process the collected data of the production environment perception module within a certain time period, construct temperature change curves of the bottom of the tank and the crown and liquid level air pressure change curves with time series characteristics, and compare the temperature change curve of the bottom of the tank with the temperature desired threshold line to obtain the undercooling temperature difference or overheating temperature difference; A fuel input control module, which is used to control the flow rate of the heat production raw materials that generate the above two temperature differences, adjust its gas volume and combustion-supporting air volume, so as to control the generation of heat; A flue gas parameter feedback module, which is used to analyze the components of the flue gas generated by the combustion reaction, obtain the proportion of CO content and NO x content proportion. According to the change of the content proportion of the two, it judges whether the combustion-supporting air is lacking or excessive, and thus sends a corresponding instruction to the fuel input control module to adjust the air-fuel ratio; The flue gas parameter feedback module and the fuel input control module perform multiple feedback adjustments to obtain the optimal air-fuel ratio.

2. The furnace control system for rubber product processing according to claim 1, wherein The production data processing module sets a temperature desired threshold line in the coordinate system of the temperature change curve of the bottom of the tank. When the real-time temperature value at the current moment is outside the temperature desired threshold line, calculate the undercooling temperature difference or overheating temperature difference, and generate a corresponding heating instruction or cooling instruction and transmit it to the fuel control module; When the real-time temperature value at the current moment is within the temperature expectation threshold line, calculate the average change slope of the temperature curve segment in the latest time period. When occurs, generate a warning of too rapid temperature increase; when occurs, generate a warning of too rapid temperature decrease; and respectively simulate and predict the time t 上 or t 下 to reach the upper and lower limits of the temperature expectation threshold according to the current average change slope k. The above k0 is the change rate limit value; send the warning signal and the corresponding time t 上 or t 下 to the fuel input control module.

3. The furnace control system for rubber product processing according to claim 2, wherein The fuel input control module changes the temperature of the rubber product liquid by adjusting the gas volume and combustion-supporting air volume. The determination process of the gas volume and combustion-supporting air volume includes: S1: Determine the air-fuel ratio according to the alkane combustion reaction equation and the volume fractions of different components in the fuel gas where a1, a2... a n are the volume fractions of each alkane component in the fuel gas; S2: Determine the corresponding gas combustion energy required for a certain volume of rubber product liquid to change a certain temperature difference, then E·η = ρV 邻 cΔT, where E represents the energy generated by gas combustion, η is the thermal efficiency of the kiln, ρ represents the density of the rubber product liquid, V 邻 represents the volume of the rubber product liquid in the heat radiation space, c represents the specific heat capacity of the rubber product liquid, and ΔT represents the temperature value of the temperature change of the rubber product liquid; S3: Determine the corresponding gas volume Q that generates the gas combustion energy E according to the combustion calorific value of different components in the gas composition and the volume fraction of different components, that is where 1≤j≤n, q j represents the calorific value of combustion of the j-th type of alkane; S4: Determine the combustion-supporting air volume αQ according to the air-fuel ratio α and the gas volume Q.

4. The furnace control system for rubber product processing according to claim 2, wherein The flue gas parameter feedback module constructs multiple flue gas composition-time relationship curves based on the flue gas composition analysis results, and observes whether there are effective distortion points within the observation time interval (t 改 , t 改 + 2Δt) in the flue gas composition-time relationship curves, where t 改 is the moment when the gas volume and the combustion-supporting air volume change, and Δt is the maximum response delay of the flue gas composition analyzer; When there is an effective distortion point in the curve representing the CO content ratio, it means that the combustion-supporting air volume is insufficient, and a combustion-supporting air supplement instruction is generated; When the representative is NO x When the curve of the content ratio shows an effective distortion point, it indicates that the amount of combustion-supporting air is excessive, and a combustion-supporting air excess command is generated; After receiving the combustion-supporting air supplement instruction or the combustion-supporting air excess instruction, the fuel input control module controls the opening degree of the combustion-supporting air inlet valve to increase or decrease correspondingly, and the adjustment ratio coefficient of the valve opening degree is set to 5% each time.

5. A furnace control system for rubber product processing according to claim 4, characterized in that, The fuel input control module obtains the optimal air-fuel ratio after multiple feedback adjustments, binds the optimal air-fuel ratio, the corresponding gas volume, and the temperatures of the bottom of the tank and the crown and the liquid level air pressure to obtain an empirical data set, and constructs a knowledge base. When changing the gas volume and combustion-supporting air volume subsequently, match according to the closest temperature, air pressure and gas volume parameters to obtain the air-fuel ratio, and reduce the number of subsequent feedback adjustments.

6. The furnace control system for rubber product processing according to claim 4, characterized in that The production data processing module also obtains the moment t when the bottom temperature of the pool reaches the median of the temperature expectation threshold according to the bottom temperature change curve at the corresponding position 中 , and is defined as the temperature compensation delay coefficient; When the fuel input control module receives a signal warning of too rapid temperature rise or too rapid temperature drop, it will or perform a ratio operation with the temperature compensation time-delay coefficient to obtain a compensated temperature difference, determine the required change in gas combustion energy based on this compensated temperature difference, and then determine the gas volume and the combustion-supporting air volume.

7. A furnace control system for rubber product processing according to claim 3, characterized in that, The thermal radiation space described in step S3 refers to the volume space within a certain neighborhood range at the cross-sectional position where the fuel inlet and the combustion-supporting air inlet are located.

8. The furnace control system for rubber product processing according to claim 3, characterized in that, The effective distortion point is a distortion point generated when the corresponding flue gas component changes sharply beyond the set interval and the subsequent curve trend of this point still extends outside the set interval.

9. A furnace control system for rubber product processing according to claim 1, characterized in that, It also includes a flue gas denitrification treatment module. The flue gas denitrification treatment module obtains the flue gas components, and calculates the total time from the generation of the flue gas to the arrival at the flue gas denitrification treatment module according to the pipeline length and the average flow velocity of the flue gas in each section, so as to determine the moment to make a corresponding change to the ammonia injection volume.

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