Paper pulp cooking control method and device, electronic equipment, storage medium and product

Abstract

The invention provides a paper pulp cooking control method and device, electronic equipment, a storage medium and a product. The method comprises the steps that paper pulp cooking parameters collected by a sampling device are obtained; based on the pulp cooking parameters, calculating the active alkali dosage in the cooking vertical pot and the liquid ratio parameter of the vertical pot, and based on the preset corresponding relation between the cooking temperature and the cooking relative reaction rate, the cooking time and the cooking temperature corresponding to the cooking time, calculating a cooking H factor; determining a cooking kappa number based on the active alkali dosage, the standing pot liquid ratio parameter and the cooking H factor; and according to the cooking kappa number, adjusting the alkali consumption for cooking the paper pulp. According to the scheme, the cooking kappa number is directly calculated according to the calculated active alkali dosage, the vertical boiler liquid ratio parameter and the cooking H factor, sampling to a laboratory for analysis and detection is not needed, the calculation efficiency of the kappa number is improved, paper pulp cooking can be controlled in time according to the cooking kappa number, the accuracy of paper pulp cooking is improved, and the production cost is reduced. And the paper pulp quality can be improved.

Description

Technical Field

[0001] This application relates to the field of pulp and paper technology, and in particular to a pulp cooking control method, apparatus, electronic equipment, storage medium and product. Background Technology

[0002] Pulp cooking is the core step in the pulping process. Its purpose is to break down lignin in the fibrous raw material through chemical or physical methods to separate cellulose fibers, which plays a decisive role in pulp quality. In actual production, precise control of the cooking results is crucial.

[0003] In existing technologies, controlling pulp cooking requires taking pulp samples during the cooking process and sending them to a laboratory for analysis and testing. The pulp cooking is then controlled based on the analysis results. However, this method is cumbersome and time-consuming, and it cannot make timely adjustments to the pulp cooking process, thus affecting the accuracy of pulp cooking and consequently the quality of the pulp.

[0004] Therefore, improving the precision of pulp cooking and enhancing pulp quality are urgent technical problems that need to be solved in this field. Summary of the Invention

[0005] Based on the above needs, this application proposes a pulp cooking control method, apparatus, electronic equipment, storage medium, and product, which can improve the accuracy of pulp cooking and thus improve pulp quality.

[0006] To achieve the above objectives, this application proposes the following technical solution: According to a first aspect of the embodiments of this application, a method for controlling pulp cooking is provided, comprising: Obtain the pulp cooking parameters collected by the pre-set sampling device; Based on the pulp cooking parameters, the amount of active alkali used in the cooking vessel and the liquid-to-cook ratio parameters are calculated. Based on the pre-set relationship between cooking temperature and relative reaction rate, cooking time and cooking temperature corresponding to cooking time, the cooking H factor is calculated. The cooking kappa number was determined based on the amount of active alkali used, the vertical pot liquid ratio parameter, and the cooking H factor. The amount of alkali used for pulp cooking is adjusted according to the cooking kappa number.

[0007] Optionally, the pulp cooking parameters include: active alkali titration value, black liquor volume, white liquor volume, black liquor density, white liquor density, wood chip loading amount, and wood chip moisture content.

[0008] Optionally, based on the pulp cooking parameters, the amount of active alkali used in the cooking vessel is calculated, including: Based on the active alkali titration value, white liquor volume, wood chip loading amount, and wood chip moisture content, the amount of active alkali used in the cooking vessel is calculated according to the pre-set active alkali calculation rules.

[0009] Optionally, based on the pulp cooking parameters, the vertical cooker liquor ratio parameter is calculated, including: Based on the volume of black liquor, the volume of white liquor, the density of black liquor, the density of white liquor, the amount of wood chips loaded into the pot, and the moisture content of the wood chips, the vertical pot liquid ratio parameters are calculated according to the pre-set vertical pot liquid ratio calculation rules.

[0010] Optionally, based on the pre-set relationship between cooking temperature and relative cooking reaction rate, cooking time, and cooking temperature corresponding to cooking time, the cooking H-factor is calculated, including: Based on the pre-set relationship between cooking temperature and relative cooking reaction rate, and the cooking temperature corresponding to cooking time, the relative cooking reaction rate corresponding to cooking temperature is determined. Based on the cooking time and the relative reaction rate of cooking, the cooking H factor is determined according to the pre-set H factor calculation rules.

[0011] Optionally, based on the cooking time and the relative reaction rate of cooking, the cooking H factor is determined according to a pre-set H factor calculation rule, including: Based on the cooking temperature corresponding to the cooking time, determine the cooking time during the heating period and the relative reaction rate during the heating period, as well as the cooking time during the holding period and the relative reaction rate during the holding period. Based on the cooking time and the relative reaction rate of cooking during the heating period, the H factor during the heating period is determined according to the pre-set H factor calculation rules. Also, based on the cooking time and the relative reaction rate of cooking during the holding period, the H factor during the holding period is determined according to the pre-set H factor calculation rules. The sum of the H factor during the heating period and the H factor during the holding period is taken as the cooking H factor.

[0012] Optional, pulp cooking control methods also include: The cooking time and temperature of the pulp are adjusted according to the cooking H factor.

[0013] According to a second aspect of the embodiments of this application, a pulp cooking control device is provided, comprising: The acquisition module is used to acquire the pulp cooking parameters collected by the pre-set sampling device; The calculation module is used to calculate the amount of active alkali and the liquid-to-pulp ratio in the cooking pan based on the pulp cooking parameters, and to calculate the cooking H factor based on the pre-set relationship between cooking temperature and relative cooking reaction rate, cooking time and cooking temperature corresponding to cooking time. The determination module is used to determine the cooking kappa number based on the amount of active alkali, the vertical pot liquid ratio parameter, and the cooking H factor; The adjustment module is used to adjust the amount of alkali used in pulp cooking based on the cooking kappa value.

[0014] According to a third aspect of the embodiments of this application, an electronic device is provided, including: a memory and a processor; The memory is connected to the processor and is used to store programs; The processor is used to implement the above-described pulp cooking control method by running the program in the memory.

[0015] According to a fourth aspect of the embodiments of this application, a computer program product is provided, including computer program instructions, which, when executed by a processor, cause the processor to implement the above-described pulp cooking control method.

[0016] The pulp cooking control method proposed in this application obtains pulp cooking parameters collected by a pre-set sampling device; based on the pulp cooking parameters, it calculates the amount of active alkali used in the cooking vessel and the cooking liquor ratio parameters; and based on the pre-set correspondence between cooking temperature and relative reaction rate, cooking time, and cooking temperature corresponding to cooking time, it calculates the cooking H-factor; based on the amount of active alkali used, the cooking liquor ratio parameters, and the cooking H-factor, it determines the cooking kappa value; and based on the cooking kappa value, it adjusts the amount of alkali used in pulp cooking. Using the technical solution of this application, the cooking kappa value can be directly calculated from the calculated amount of active alkali used, the cooking liquor ratio parameters, and the cooking H-factor, without the need for sampling and laboratory analysis, thus improving the calculation efficiency of the kappa value. This allows for timely control of pulp cooking based on the cooking kappa value, improving the accuracy of pulp cooking and ultimately improving pulp quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic flowchart of a pulp cooking control method provided in an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the sampling device provided in the embodiments of this application.

[0020] Figure 3This is a schematic flowchart of another pulp cooking control method provided in an embodiment of this application.

[0021] Figure 4 This is a schematic diagram of a pulp cooking control device provided in an embodiment of this application.

[0022] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0023] The technical solutions of this application are applicable to pulp and paper manufacturing scenarios, specifically to pulp cooking control. By employing the technical solutions of this application, the accuracy of pulp cooking can be improved, thereby enhancing pulp quality.

[0024] In the chemical pulping industry, the kappa value of pulp is a crucial quality indicator with irreplaceable importance. The kappa value is used to determine the residual lignin content in chemical pulp. It indirectly reflects the lignin content by measuring the consumption of potassium permanganate solution oxidation, and is an important parameter for evaluating the control of the chemical pulping process.

[0025] Cooking is a core step in the chemical pulping process and plays a decisive role in pulp quality. Evaluation criteria for cooked pulp mainly focus on the residual lignin content and pulp yield. Among these, the kappa number determination method is specifically applicable to chemical pulps and provides crucial information for evaluating the final degree of delignification during cooking and for subsequent bleaching processes.

[0026] In actual production, precise control of the cooking results is crucial. If the kappa number of the pulp after cooking is too high, it means that the residual lignin content in the pulp is too high. This results in substandard raw pulp that cannot meet the requirements of subsequent processing and product quality. Conversely, if cooking is overdone and the kappa number is too low, although the lignin content is reduced, the fibers will be damaged, leading to a decrease in fiber yield. Ultimately, this results in substandard pulp, which also wastes production resources and reduces product quality.

[0027] In existing technologies, controlling pulp cooking requires taking pulp samples during the cooking process and sending them to a laboratory for analysis and testing. The pulp cooking is then controlled based on the analysis results. However, this method is cumbersome and time-consuming, and it cannot make timely adjustments to the pulp cooking process, thus affecting the accuracy of pulp cooking and consequently the quality of the pulp.

[0028] Based on this, this application proposes a pulp cooking control method. This technical solution can control pulp cooking in a timely manner according to the cooking kappa value, thereby solving the problem of low accuracy of pulp cooking in the prior art, which affects pulp quality.

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Exemplary methods See Figure 1 As shown in the embodiment of this application, a method for controlling pulp cooking is proposed. The method includes: S101. Obtain the pulp cooking parameters collected by the pre-set sampling device.

[0031] The vertical pulp digester is a key intermittent piece of equipment used in the papermaking industry for chemical pulping. Its core function is to remove lignin from plant fiber raw materials through the action of chemical agents under high temperature and pressure, thereby achieving fiber dissociation and forming pulp raw materials. In this embodiment, a sampling device is pre-set to extract liquid samples from the digester; see [link to relevant documentation]. Figure 2 As shown, the sampling device includes a sampling tank 101, a manual valve 102, a pneumatic regulating valve 103, a manual sampling valve 104, a pH meter 105, a density meter 106, a temperature transmitter 107, and a pneumatic switching valve 108. The sampling tank 101 is connected to the main circulating liquid pipeline 20 of the cooking boiler via a pipe. The manual valve 102 and the pneumatic regulating valve 103 are installed in the liquid input connection pipe between the sampling tank 101 and the main circulating liquid pipeline 20. A manual sampling valve 104 is located at the bottom of the sampling tank 101 and is used to collect liquid samples from the boiler. The pH meter 105 and the density meter 106 are located at the top of the sampling tank 101, and the temperature transmitter 107 and the pneumatic switching valve 108 are located in the liquid output connection pipe between the sampling tank 101 and the main circulating liquid pipeline 20.

[0032] This embodiment can collect pulp cooking parameters using a pre-set sampling device. These parameters include active alkali titration value, black liquor volume, white liquor volume, black liquor density, white liquor density, wood chip loading amount, and wood chip moisture content. Black liquor is the waste liquid generated during pulp cooking, and white liquor is the chemical reagent solution used in pulp cooking. These pulp cooking parameters can be collected using various sensors in the sampling device, or measured before the cooking material is fed into the cooking vessel, or by collecting a liquid sample from the cooking vessel using the manual sampling valve 104 in the sampling device and then measuring the sample. Those skilled in the art can collect pulp cooking parameters using the technical means available in this embodiment, and this embodiment will not elaborate further.

[0033] S102. Based on the pulp cooking parameters, calculate the amount of active alkali used in the cooking vessel and the cooking vessel liquor ratio parameters. Based on the pre-set relationship between cooking temperature and relative cooking reaction rate, cooking time, and cooking temperature corresponding to cooking time, calculate the cooking H factor.

[0034] After obtaining the pulp cooking parameters in this embodiment, it is necessary to use these parameters to calculate the amount of active alkali used in the cooking pot and the pot liquor ratio. Pre-set calculation rules for these parameters are used to obtain the required pulp cooking parameters from all available parameters according to these rules, thus enabling the calculation of these parameters. The amount of active alkali used refers to the total concentration of effective chemical agents participating in the delignification reaction in the cooking liquor; it is a core chemical parameter determining delignification efficiency, pulp kappa number, and fiber quality. The pot liquor ratio is the ratio of the total cooking liquor volume to the oven-dry raw material mass in the cooking pot, and it is one of the core process parameters affecting delignification efficiency, pulp quality, and agent utilization.

[0035] This embodiment also requires calculating the cooking H-factor, a core parameter characterizing the lignin removal efficiency during alkaline cooking. It quantifies the degree of reaction between the fiber raw material and cooking agents (such as alkali, sulfites, etc.) and is a key indicator guiding cooking operations and ensuring pulp quality stability. The cooking H-factor is the definite integral of the relative reaction rate over cooking time at different temperatures; that is, the area enclosed by the curves of relative reaction rate versus cooking time. For each cooking H-factor value, the resulting pulp yield and lignin content are constant (i.e., the cooking H-factor is constant), meaning the total amount of reaction during cooking is constant, and therefore the degree of delignin removal is constant. Therefore, this embodiment can control the cooking process and stabilize pulp quality through the cooking H-factor. This embodiment pre-sets the correspondence between cooking temperature and relative reaction rate. The calculation of the cooking H-factor requires utilizing the pre-set correspondence between cooking temperature and relative reaction rate, cooking time, and the cooking temperature corresponding to the cooking time.

[0036] In one specific implementation, the amount of active alkali used in the digester is calculated based on the pulp cooking parameters. The specific steps are as follows: Based on the active alkali titration value, white liquor volume, wood chip loading amount, and wood chip moisture content, the amount of active alkali used in the cooking vessel is calculated according to the pre-set active alkali calculation rules.

[0037] In this embodiment, a pre-set rule for calculating active alkali is established. This rule specifies that the amount of active alkali used in the cooking vessel should be calculated using the active alkali titration value, white liquor volume, wood chip loading amount, and wood chip moisture content from the pulp cooking parameters. The active alkali calculation rule is as follows: in, The unit for the amount of active alkali used in the cooking vessel is mL / g; This indicates the titration value of the active alkali, in mL. The volume of white liquid is expressed in cubic feet (ft). 3 ; This indicates the amount of wood chips loaded into the pot, in tons (t). The moisture content of the wood chips is expressed as a percentage.

[0038] In one specific implementation, the vertical cooking liquor ratio parameter is calculated based on the pulp cooking parameters. The specific steps are as follows: Based on the volume of black liquor, the volume of white liquor, the density of black liquor, the density of white liquor, the amount of wood chips loaded into the pot, and the moisture content of the wood chips, the vertical pot liquid ratio parameters are calculated according to the pre-set vertical pot liquid ratio calculation rules.

[0039] In this embodiment, a pre-set rule for calculating the vertical cooker liquor ratio is established. This rule specifies that the vertical cooker liquor ratio parameter needs to be calculated using the black liquor volume, white liquor volume, black liquor density, white liquor density, wood chip loading amount, and wood chip moisture content from the pulp cooking parameters. The vertical cooker liquor ratio calculation rule is as follows: in, This indicates the liquid-to-water ratio parameter for vertical boilers, in mL / g. The volume of white liquor is expressed in feet (ft). 3 ; This represents the volume of black liquor, in feet (ft). 3 ; This indicates the density of the white liquor, with units of 1b / 1ft. 3 ; This represents the density of black liquor, with units of 1b / 1ft. 3 ; This indicates the amount of wood chips loaded into the pot, in tons (t). The moisture content of the wood chips is expressed as a percentage.

[0040] In one specific implementation, the cooking H-factor is calculated based on the pre-set relationship between cooking temperature and relative cooking reaction rate, cooking time, and cooking temperature corresponding to cooking time. The specific steps are as follows: First, based on the pre-set relationship between cooking temperature and relative cooking reaction rate, and the cooking temperature corresponding to cooking time, the relative cooking reaction rate corresponding to cooking temperature is determined.

[0041] In this embodiment, a pre-defined relationship between cooking temperature and relative cooking reaction rate is established, as shown in Table 1 below. The sampling device in this embodiment is equipped with a temperature transmitter capable of acquiring the current cooking temperature. This embodiment determines the current cooking time and obtains the cooking temperature corresponding to the current cooking time. The relative cooking reaction rate corresponding to the current cooking temperature is then retrieved from the relationship between cooking temperature and relative cooking reaction rate. This method allows for the acquisition of cooking temperatures at various cooking times during the pulp cooking process, thereby enabling the determination of the relative cooking reaction rate corresponding to each cooking time based on the cooking temperature at each cooking time.

[0042] Table 1. Relationship between cooking temperature and relative cooking reaction rate Second, based on the cooking time and the relative reaction rate of cooking, the cooking H factor is determined according to the pre-set H factor calculation rules.

[0043] This embodiment pre-sets H-factor calculation rules. After determining the relative reaction rate of each cooking time in the pulp cooking process, the cooking H-factor is calculated according to these rules. The pulp cooking process includes a heating process and a holding process. The cooking H-factor is the sum of the H-factors during the heating and holding processes, and the calculation rules for the H-factor during the heating and holding processes are the same.

[0044] The specific steps are as follows: First, based on the cooking temperature corresponding to the cooking time, determine the relative reaction rate of cooking during the heating period and the relative reaction rate of cooking during the heating period, as well as the relative reaction rate of cooking during the holding period and the holding period.

[0045] This embodiment first needs to determine the cooking time during the heating period and the cooking time during the heat preservation period. Then, from the predetermined relative reaction rates corresponding to each cooking time, the relative reaction rates corresponding to each cooking time during the heating period and the relative reaction rates corresponding to each cooking time during the heat preservation period are determined.

[0046] Secondly, based on the cooking time and the relative reaction rate of cooking during the heating period, the H factor during the heating period is determined according to the pre-set H factor calculation rules. Also, based on the cooking time and the relative reaction rate of cooking during the heat preservation period, the H factor during the heat preservation period is determined according to the pre-set H factor calculation rules.

[0047] In this embodiment, the H-factor calculation rule is to multiply the average of the relative reaction rate of cooking at the current cooking time and temperature with the relative reaction rate of cooking at the cooking time and temperature during the previous H-factor calculation by the time interval between the current cooking time and the previous H-factor calculation. That is, the H-factor calculation rule is: in, This represents the average of the relative reaction rate at the current cooking time and temperature compared to the relative reaction rate at the cooking time and temperature used in the previous calculation of the H factor. This represents the time interval between the current cooking time and the cooking time during the previous calculation of the H factor.

[0048] In this embodiment, the heating period and the heat preservation period can be divided into multiple time periods according to a preset time interval. Then, the H factor of each time period is calculated according to the above-mentioned H factor calculation rules. The sum of the H factors of all time periods during the heating period is taken as the H factor of the heating period, and the sum of the H factors of all time periods during the heat preservation period is taken as the H factor of the heat preservation period. Since the cooking temperature does not change with the cooking time during the heat preservation period, the corresponding relative reaction rate of cooking will not change. Therefore, in this embodiment, the heat preservation period can be directly treated as a whole time period, and the H factor of the heat preservation period can be directly calculated. That is, the constant relative reaction rate of cooking during the heat preservation period is multiplied by the time interval of the heat preservation period to obtain the H factor of the heat preservation period.

[0049] Finally, the sum of the H factor during the heating period and the H factor during the holding period is taken as the cooking H factor.

[0050] In a specific embodiment, the cooking time, cooking temperature, and the corresponding relative reaction rate for each cooking temperature are shown in Table 2 below (wherein, the relative reaction rate is rounded to the nearest integer): Table 2 The heating period is 0-1.5 seconds, and the heat preservation period is 1.5-3 seconds. The heating period is divided into 6 time segments: the first segment is 0-0.25 seconds, the second segment is 0.25-0.5 seconds, the third segment is 0.5-0.75 seconds, the fourth segment is 0.75-1 seconds, the fifth segment is 1-1.25 seconds, and the sixth segment is 1.25-1.5 seconds. The H-factor for the first time period is: H1 = [(0+0) / 2] × 0.25 = 0; the H-factor for the second time period is: H2 = [(0+3) / 2] × 0.25 = 0.5, rounded to 1; the H-factor for the third time period is: H3 = [(3+15) / 2] × 0.25 = 2.25, rounded to 2; the H-factor for the fourth time period is: H4 = [(15+66) / 2] × 0.25 = 10.125, rounded to 10; the H-factor for the fifth time period is: H5 = [(66+258) / 2] × 0.25 = 40.5, rounded to 41; the H-factor for the sixth time period is: H6 = [(258+921) / 2] × 0.25 = 147.375, rounded to 147. The H-factor during the heating period is the sum of the H-factors of the above six time periods, that is, H... 升 =0 + 1 + 2 + 10 + 41 + 147 = 201. The H factor during the insulation period is H... 保 =921×(3-1.5)=1381.5, rounded to 1382. The final cooking H factor is the sum of the H factor during the heating period and the H factor during the holding period, i.e., H=H 升 +H 保 =201+1382=1583.

[0051] S103. Determine the cooking kappa number based on the amount of active alkali, the vertical pot liquid ratio parameter, and the cooking H factor.

[0052] This embodiment pre-sets a calculation rule for the cooking kappa number. Following this rule, the cooking kappa number can be calculated using the active alkali dosage, vertical pot liquor ratio parameter, and cooking H factor calculated in the above steps. The pre-set calculation rule for the cooking kappa number is based on existing laboratory calculation formulas, as follows: in, Indicates the cooking kappa value. Indicates the amount of active alkali used. This indicates the liquid-to-water ratio parameter of the vertical boiler. This indicates the cooking H factor.

[0053] S104. Adjust the amount of alkali used in pulp cooking according to the cooking kappa number.

[0054] This embodiment adjusts the amount of alkali used in pulp cooking based on the calculated kappa number, thereby ensuring that the kappa number remains within the standard range and guaranteeing the quality of the pulp cooking. The amount of alkali used is the active alkali titration value. Since different raw materials, different process conditions, and different qualities of pulp produce different adjustments for the amount of alkali used in pulp cooking, these adjustments need to be determined in advance through practical experience. This embodiment will not provide specific examples for each case.

[0055] This embodiment directly calculates the cooking kappa value using the above method, eliminating the need for sampling and laboratory testing. This reduces the time required to determine the cooking kappa value, improves the calculation efficiency, and ensures real-time adjustment of alkali dosage based on the cooking kappa value. This enhances the accuracy of pulp cooking and ultimately improves pulp quality.

[0056] As described above, the pulp cooking control method proposed in this application obtains pulp cooking parameters collected by a pre-set sampling device; based on these parameters, it calculates the amount of active alkali used in the cooking vessel and the vessel liquor-to-cook ratio; and based on the pre-set relationship between cooking temperature and relative reaction rate, cooking time, and cooking temperature corresponding to cooking time, it calculates the cooking H-factor; based on the amount of active alkali used, vessel liquor-to-cook ratio, and cooking H-factor, it determines the cooking kappa value; and based on the cooking kappa value, it adjusts the amount of alkali used in pulp cooking. Using the technical solution of this application, the cooking kappa value can be directly calculated based on the calculated amount of active alkali used, vessel liquor-to-cook ratio, and cooking H-factor, without the need for laboratory sampling and analysis, thus improving the calculation efficiency of the kappa value. This allows for timely control of pulp cooking based on the cooking kappa value, improving the accuracy of pulp cooking and ultimately improving pulp quality.

[0057] As an optional implementation, this application also proposes a method for controlling pulp cooking. See [link to relevant documentation]. Figure 3 As shown, the method includes: S301. Obtain the pulp cooking parameters collected by the pre-set sampling device.

[0058] S302. Based on the pulp cooking parameters, calculate the amount of active alkali used in the cooking vessel and the liquid-to-cook ratio parameters. Based on the pre-set relationship between cooking temperature and relative cooking reaction rate, cooking time, and cooking temperature corresponding to cooking time, calculate the cooking H factor.

[0059] S303. Based on the amount of active alkali, the vertical boiler liquid ratio parameter, and the cooking H factor, determine the cooking kappa number.

[0060] S304. Adjust the amount of alkali used in pulp cooking according to the cooking kappa number.

[0061] S305. Adjust the pulp cooking time and temperature according to the cooking H factor.

[0062] After calculating the cooking H-factor, this embodiment allows for adjustments to the pulp cooking time and temperature based on this factor. When adjusting the cooking time and temperature, it is preferable to set the cooking temperature during the holding period between 160℃ and 170℃ to control the cooking at a low temperature, thereby reducing fiber damage. With the goal of stabilizing the cooking H-factor, the holding time is adjusted based on the adjusted cooking temperature during the holding period. This allows for the adjustment of the pulp cooking time and temperature, ensuring stable fiber hardness values, improving the accuracy of pulp cooking, and ultimately enhancing pulp quality.

[0063] In one specific embodiment, based on Table 2 of the above embodiments, the cooking temperature during the heat preservation period is increased to 180°C. With the goal of stabilizing the cooking H factor, the heat preservation time can be calculated. As shown in Table 3 below, the cooking time, cooking temperature, and the corresponding relative reaction rate for each cooking temperature are examples (where the relative reaction rate is rounded to the nearest integer): Table 3 In this context, the cooking time of 0-1.5s (heating period) and 1.5-3s (holding period) shown in Table 2 are changed to 0-1.67s (heating period) and 1.67-Xs (holding period). The H-factor for the heating period needs to be calculated based on the H-factor in Table 2, and the H-factor for the seventh time period (1.5-1.67s) needs to be added: H7 = [(921+2057) / 2] × 0.17 = 253.13. Rounding to 253, the final calculated H-factor for the heating period is H... 升 =0+1+2+10+41+147+253=454. The H factor during the insulation period is H... 保 =2057×(X-1.67). The final cooking H factor is the sum of the H factor during the heating period and the H factor during the holding period, which remains stable, i.e., unchanged. Therefore, H = H 升 +H 保 =454 + 2057 × (X - 1.67) = 1583. X is ultimately calculated to be 2.22. Therefore, when the cooking temperature during the heat preservation period is increased to 180℃, the heat preservation time should be adjusted from the original 1.5~3s to 1.67~2.22s.

[0064] In this embodiment, the specific execution methods of steps S301-S304 are the same as those of steps S101-S104 in the above embodiment, and will not be repeated here. In this embodiment, the execution order of steps S305 and S304 is not limited. Step S304 can be executed first, followed by step S305; or step S305 can be executed first, followed by step S304; or steps S304 and S305 can be executed simultaneously.

[0065] Exemplary device Accordingly, this application also provides a pulp cooking control device, see [link to relevant documentation]. Figure 4 As shown, the device includes: The acquisition module 100 is used to acquire the pulp cooking parameters collected by the pre-set sampling device; The calculation module 110 is used to calculate the amount of active alkali and the liquid-to-liquid ratio in the cooking pan based on the pulp cooking parameters, and to calculate the cooking H factor based on the pre-set relationship between cooking temperature and relative cooking reaction rate, cooking time and cooking temperature corresponding to cooking time. Module 120 is used to determine the cooking kappa value based on the amount of active alkali, the vertical pot liquid ratio parameter, and the cooking H factor. The adjustment module 130 is used to adjust the amount of alkali used in pulp cooking according to the cooking kappa number.

[0066] As can be seen from the above description, the pulp cooking control device proposed in this application can directly calculate the cooking kappa value based on the calculated active alkali dosage, vertical liquor ratio parameters, and cooking H factor, without the need for sampling and laboratory analysis, thus improving the calculation efficiency of the kappa value. This allows for timely control of pulp cooking based on the cooking kappa value, improving the accuracy of pulp cooking and ultimately enhancing pulp quality.

[0067] As an optional implementation, another embodiment of this application discloses that the pulp cooking parameters include: active alkali titration value, black liquor volume, white liquor volume, black liquor density, white liquor density, wood chip loading amount, and wood chip moisture content.

[0068] As an optional implementation, another embodiment of this application discloses that the computing module 110 includes a first computing unit.

[0069] The first calculation unit is used to calculate the amount of active alkali used in the cooking pot based on the active alkali titration value, white liquor volume, wood chip loading amount, and wood chip moisture content, according to the pre-set active alkali calculation rules.

[0070] As an optional implementation, another embodiment of this application discloses that the computing module 110 further includes a second computing unit.

[0071] The second calculation unit is used to calculate the vertical boiler liquid ratio parameters based on the black liquor volume, white liquor volume, black liquor density, white liquor density, wood chip loading amount, and wood chip moisture content, according to the pre-set vertical boiler liquid ratio calculation rules.

[0072] As an optional implementation, another embodiment of this application discloses that the calculation module 110 further includes a rate determination unit and a third calculation unit.

[0073] The rate determination unit is used to determine the relative reaction rate of cooking at a cooking temperature based on the pre-set correspondence between cooking temperature and cooking relative reaction rate, and cooking temperature corresponding to cooking time. The third calculation unit is used to determine the cooking H factor based on the cooking time and the relative reaction rate of cooking, according to the pre-set H factor calculation rules.

[0074] As an optional implementation, another embodiment of this application discloses a third computing unit, specifically used for: Based on the cooking temperature corresponding to the cooking time, determine the cooking time during the heating period and the relative reaction rate during the heating period, as well as the cooking time during the holding period and the relative reaction rate during the holding period. Based on the cooking time and the relative reaction rate of cooking during the heating period, the H factor during the heating period is determined according to the pre-set H factor calculation rules. Also, based on the cooking time and the relative reaction rate of cooking during the holding period, the H factor during the holding period is determined according to the pre-set H factor calculation rules. The sum of the H factor during the heating period and the H factor during the holding period is taken as the cooking H factor.

[0075] As an optional implementation, another embodiment of this application discloses that the adjustment module 130 is further used to: adjust the pulp cooking time and cooking temperature according to the cooking H factor.

[0076] The pulp cooking control device provided in this embodiment belongs to the same concept as the pulp cooking control method provided in the above embodiments of this application. It can execute the pulp cooking control method provided in any of the above embodiments of this application and has the corresponding functional modules and beneficial effects for executing the pulp cooking control method. Technical details not described in detail in this embodiment can be found in the specific processing content of the method provided in the above embodiments of this application, and will not be repeated here.

[0077] Exemplary electronic devices Another embodiment of this application also provides an electronic device, see [link to relevant documentation] Figure 5 As shown, the device includes: Memory 200 and processor 210; The memory 200 is connected to the processor 210 and is used to store programs; The processor 210 is used to implement the pulp cooking control method disclosed in any of the above embodiments by running the program stored in the memory 200.

[0078] Specifically, the aforementioned electronic device may also include: a bus, a communication interface 220, an input device 230, and an output device 240.

[0079] The processor 210, memory 200, communication interface 220, input device 230, and output device 240 are interconnected via a bus. Among them: A bus can include a pathway for transmitting information between various components of a computer system.

[0080] Processor 210 can be a general-purpose processor, such as a general-purpose central processing unit (CPU), a microprocessor, etc., or an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present invention. It can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0081] Processor 210 may include a main processor, as well as a baseband chip, modem, etc.

[0082] The memory 200 stores a program that executes the technical solution of this invention, and may also store an operating system and other key business functions. Specifically, the program may include program code, which includes computer operation instructions. More specifically, the memory 200 may include read-only memory (ROM), other types of static storage devices capable of storing static information and instructions, random access memory (RAM), other types of dynamic storage devices capable of storing information and instructions, disk storage, flash memory, etc.

[0083] Input device 230 may include a device for receiving user input data and information, such as a keyboard, mouse, camera, scanner, light pen, voice input device, touch screen, pedometer, or gravity sensor.

[0084] Output device 240 may include devices that allow information to be output to a user, such as a display screen, printer, speaker, etc.

[0085] The communication interface 220 may include a device that uses any transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), etc.

[0086] The processor 210 executes the program stored in the memory 200 and calls other devices, and can be used to implement any of the steps of the pulp cooking control method provided in the above embodiments of this application.

[0087] Exemplary computer program products and storage media In addition to the methods and apparatus described above, embodiments of this application may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the steps in the pulp cooking control methods according to various embodiments of this application as described in the "Exemplary Methods" section of this specification.

[0088] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0089] Furthermore, embodiments of this application may also be storage media storing a computer program, which is executed by a processor in the steps of the pulp cooking control method according to various embodiments of this application described in the "Exemplary Methods" section above.

[0090] For the foregoing method embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0091] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For apparatus embodiments, since they are basically similar to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0092] The steps in the methods of the various embodiments of this application can be adjusted, merged, or deleted in order according to actual needs, and the technical features described in each embodiment can be replaced or combined.

[0093] The modules and sub-modules in the various embodiments of the present application's devices and terminals can be merged, divided, and deleted according to actual needs.

[0094] It should be understood that the disclosed terminals, devices, and methods can be implemented in other ways, given the several embodiments provided in this application. For example, the terminal embodiments described above are merely illustrative. For instance, the division of modules or sub-modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple sub-modules or modules may be combined or integrated into another module, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0095] The modules or submodules described as separate components may or may not be physically separate. The components that constitute a module or submodule may or may not be physical modules or submodules; that is, they may be located in one place or distributed across multiple network modules or submodules. Some or all of the modules or submodules can be selected to achieve the purpose of this embodiment's solution, depending on actual needs.

[0096] Furthermore, the functional modules or sub-modules in the various embodiments of this application can be integrated into one processing module, or each module or sub-module can exist physically separately, or two or more modules or sub-modules can be integrated into one module. The integrated modules or sub-modules described above can be implemented in hardware or in the form of software functional modules or sub-modules.

[0097] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0098] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software unit executed by a processor, or a combination of both. The software unit can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0099] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0100] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling pulp cooking, characterized in that, include: Obtain the pulp cooking parameters collected by the pre-set sampling device; Based on the pulp cooking parameters, the amount of active alkali used in the cooking vessel and the liquid-to-cook ratio parameters are calculated. Based on the pre-set relationship between cooking temperature and relative reaction rate, cooking time and cooking temperature corresponding to cooking time, the cooking H factor is calculated. The cooking kappa number was determined based on the amount of active alkali used, the vertical pot liquid ratio parameter, and the cooking H factor. The amount of alkali used for pulp cooking is adjusted according to the cooking kappa number.

2. The pulp cooking control method according to claim 1, characterized in that, The pulp cooking parameters include: active alkali titration value, black liquor volume, white liquor volume, black liquor density, white liquor density, wood chip loading amount, and wood chip moisture content.

3. The pulp cooking control method according to claim 2, characterized in that, Based on the pulp cooking parameters, the amount of active alkali used in the cooking vessel is calculated, including: Based on the active alkali titration value, white liquor volume, wood chip loading amount, and wood chip moisture content, the amount of active alkali used in the cooking vessel is calculated according to the pre-set active alkali calculation rules.

4. The pulp cooking control method according to claim 2, characterized in that, Based on the pulp cooking parameters, the vertical cooker liquor ratio parameters are calculated, including: Based on the volume of black liquor, the volume of white liquor, the density of black liquor, the density of white liquor, the amount of wood chips loaded into the pot, and the moisture content of the wood chips, the vertical pot liquid ratio parameters are calculated according to the pre-set vertical pot liquid ratio calculation rules.

5. The pulp cooking control method according to claim 1, characterized in that, Based on the pre-set relationship between cooking temperature and relative cooking reaction rate, cooking time, and cooking temperature corresponding to cooking time, the cooking H factor is calculated, including: Based on the pre-set relationship between cooking temperature and relative cooking reaction rate, and the cooking temperature corresponding to cooking time, the relative cooking reaction rate corresponding to cooking temperature is determined. Based on the cooking time and the relative reaction rate of cooking, the cooking H factor is determined according to the pre-set H factor calculation rules.

6. The pulp cooking control method according to claim 5, characterized in that, Based on the cooking time and the relative reaction rate of cooking, the cooking H factor is determined according to the pre-set H factor calculation rules, including: Based on the cooking temperature corresponding to the cooking time, determine the cooking time during the heating period and the relative reaction rate during the heating period, as well as the cooking time during the holding period and the relative reaction rate during the holding period. Based on the cooking time and the relative reaction rate of cooking during the heating period, the H factor during the heating period is determined according to the pre-set H factor calculation rules. Also, based on the cooking time and the relative reaction rate of cooking during the holding period, the H factor during the holding period is determined according to the pre-set H factor calculation rules. The sum of the H factor during the heating period and the H factor during the holding period is taken as the cooking H factor.

7. The pulp cooking control method according to claim 1, characterized in that, Also includes: The cooking time and temperature of the pulp are adjusted according to the cooking H factor.

8. A pulp cooking control device, characterized in that, include: The acquisition module is used to acquire the pulp cooking parameters collected by the pre-set sampling device; The calculation module is used to calculate the amount of active alkali and the liquid-to-pulp ratio in the cooking pan based on the pulp cooking parameters, and to calculate the cooking H factor based on the pre-set relationship between cooking temperature and relative cooking reaction rate, cooking time and cooking temperature corresponding to cooking time. The determination module is used to determine the cooking kappa number based on the amount of active alkali, the vertical pot liquid ratio parameter, and the cooking H factor; The adjustment module is used to adjust the amount of alkali used in pulp cooking based on the cooking kappa value.

9. An electronic device, characterized in that, include: Memory and processor; The memory is connected to the processor and is used to store programs; The processor is configured to implement the pulp cooking control method as described in any one of claims 1 to 7 by running a program in the memory.

10. A computer program product, characterized in that, It includes computer program instructions that, when executed by a processor, cause the processor to implement the pulp cooking control method as described in any one of claims 1 to 7.

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