Working method of intelligent squeezing control system for squeezing juice in sugar factories

Abstract

The present invention discloses an intelligent squeezing control system and a working method thereof for squeezing and extracting juice in a sugar factory, including a squeezing machine speed control module and a squeezing machine control system; the squeezing machine control system includes several squeezing machine control subsystems; the squeezing machine speed control module is connected to the squeezing machine control subsystems at all levels; each squeezing machine control subsystem includes a squeezing machine motor current sensor, a squeezing machine motor speed regulating cabinet, a squeezing machine material level sensor group and a squeezing machine motor angular velocity sensor; the squeezing machine material level sensor group includes several material level sensors; the squeezing machine motor speed regulating cabinet is a frequency converter or a DC speed regulator. The present invention enables the secondary squeezing machine and subsequent squeezing machines at all levels to adjust the speed in real time according to the situation of the previous squeezing machine, which is conducive to ensuring the smooth operation of the squeezing machine, reducing safety hazards, improving squeezing efficiency and squeezing effect, and optimizing the squeezing process.

Description

Technical Field

[0001] The invention relates to a sugar factory squeezing and juice extraction control system, and in particular to an intelligent squeezing control system and a working method thereof for squeezing and juice extraction in a sugar factory. Background Art

[0002] The squeezing and juice extraction process in the sugar factory is completed in the squeezing workshop, including multi-stage squeezing machines and multi-stage squeezing machine control systems. In actual production, the fiber content of sugarcane varies with the sugarcane variety and season, which causes the density of sugarcane to change, resulting in changes in the volume of sugarcane entering the squeeze, and changes in the speed of the first-stage squeezing machine, affecting the operating stability of the squeezing machine. In the prior art, the squeezing machine control systems at each level operate independently, and data cannot be shared and linked with each other. Therefore, the squeezing machine control systems at each level cannot know the changes in the speed of the previous squeezing machine, and can only adjust their own speed according to their own material level and current, which has hysteresis, aggravating the instability of the squeezing machine system operation, resulting in the inability to completely squeeze out the effective ingredients of the sugarcane, resulting in sugar loss. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide an intelligent squeezing control system and a working method for squeezing and extracting juice in a sugar factory, so as to solve the technical problem that the control systems of the squeezers at each level in the prior art operate separately and cannot share data and conduct linkage regulation with each other, which aggravates the instability of the operation of the squeezer system, resulting in the inability to completely squeeze out the effective ingredients of sugarcane and causing sugar loss.

[0004] To achieve the above-mentioned purpose, the present invention provides an intelligent squeezing control system for squeezing and juice extraction in a sugar factory, comprising a squeezer speed control module and a squeezer control system; the squeezer control system comprises several levels of squeezer control subsystems; the squeezer speed control module is connected to each level of squeezer control subsystems; each level of squeezer control subsystem comprises a squeezer motor current sensor, a squeezer motor speed control cabinet, a squeezer material level sensor group and a squeezer motor angular velocity sensor; the squeezer material level sensor group comprises several material level sensors; the squeezer motor speed control cabinet is a frequency converter or a DC speed regulator.

[0005] Furthermore, each level of the press control subsystem also includes a press alarm light.

[0006] Furthermore, each level of the press control subsystem also includes a press buzzer.

[0007] The present invention also provides a working method of an intelligent squeezing control system for squeezing juice in a sugar factory:

[0008] The speed adjustment method of the secondary press is as follows: the maximum angular velocity of the secondary press motor is preset in the press speed control module. Maximum current I of the motor of the secondary press M2 max and the maximum material level L2max of the secondary press; first determine the current I of the secondary press motor measured by the current sensor of the secondary press motor M2 Is it greater than or equal to I M2 max, and judging whether the secondary press material level L2 measured by the secondary press material level sensor group is greater than or equal to L2max;

[0009] When any one of the two conditions is met, the press speed control module controls the target angular velocity of the secondary press motor. equal That is, when I M2 ≥I M2 max or L2 ≥ L2max,

[0010] When both conditions are not met, the press speed control module receives the actual angular velocity of the first-stage press motor measured by the angular velocity sensor of the first-stage press motor. The current I of the first-stage press motor measured by the first-stage press motor current sensor M1 , and combined with the current I of the secondary press motor measured by the secondary press motor current sensor M2 , calculate the target angular velocity of the secondary press motor The calculation method is: 0.9≤K d2 ≤2;

[0011] Get the target angular velocity of the secondary press motor After that, the press speed control module will The speed control cabinet of the secondary press motor is used to adjust the angular velocity of the secondary press motor. The angular velocity sensor of the secondary press motor measures the actual angular velocity of the secondary press motor. Close to

[0012] Similarly, the speed adjustment method of the n-stage press is as follows: the maximum angular velocity of the n-stage press motor is preset in the press speed control module Maximum current I of the motor of the n-stage press Mn max and n-stage press maximum material level L n max; first determine the current I of the n-stage press motor measured by the n-stage press motor current sensor Mn Is it greater than or equal to I Mn max, and determine the n-stage press material level L measured by the n-stage press material level sensor group n Is it greater than or equal to L? nmax;

[0013] When any one of the two conditions is met, the press speed control module controls the target angular velocity of the n-stage press motor. equal That is, when I Mn ≥I Mn max or L n ≥L n When max,

[0014] When both conditions are not met, the press speed control module receives the actual angular velocity of the (n-1) level press motor. and the current I of the (n-1)-stage press motor M(n-1) , and combined with the current I of the n-stage press motor measured by the n-stage press motor current sensor Mn , calculate the target angular velocity of the n-stage press motor The calculation method is: n>2;0.9≤K dn ≤2;

[0015] Get the target angular velocity of the n-stage press motor After that, the press speed control module will The speed control cabinet of the n-stage press motor is used to adjust the angular velocity of the n-stage press motor. The angular velocity sensor of the n-stage press motor measures the actual angular velocity of the n-stage press motor. Close to

[0016] Where K d2 and K dn All are set values ​​and are related to the mechanical properties of the press.

[0017] Preferably, K d2 The value of K is 1.5; dn The value of is 1.5.

[0018] The beneficial effects of the present invention compared with the prior art are:

[0019] The present invention realizes data sharing and linkage control between the press control subsystems of the press control system through the press speed control module, so that the secondary press and subsequent presses can adjust the speed in real time according to the situation of the previous press, reducing the impact on the press caused by the change of the input volume due to the change of fiber content, which is beneficial to the smooth operation of the press, promotes the extraction of sugar, reduces the light conversion degree of bagasse, increases the output, reduces the moisture content of bagasse, and optimizes the pressing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of Example 1;

[0021] Figure 2 for Figure 1 Schematic diagram of the control subsystem structure of a certain level of press. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 1-2 As shown, an intelligent squeezing control system for squeezing and juice extraction in a sugar factory includes a squeezer speed control module and a squeezer control system; the squeezer control system includes several levels of squeezer control subsystems; the squeezer speed control module is connected to each level of squeezer control subsystems; each level of squeezer control subsystem includes a squeezer motor current sensor, a squeezer motor speed control cabinet, a squeezer material level sensor group and a squeezer motor angular velocity sensor; the squeezer material level sensor group includes several material level sensors; the squeezer motor speed control cabinet is a frequency converter or a DC speed regulator.

[0025] Furthermore, each level of the press control subsystem also includes a press alarm light.

[0026] Furthermore, each level of the press control subsystem also includes a press buzzer.

[0027] Example 2

[0028] A working method of an intelligent squeezing control system for squeezing juice in a sugar factory, wherein:

[0029] The speed adjustment method of the secondary press is as follows: the maximum angular velocity of the secondary press motor is preset in the press speed control module Maximum current I of the motor of the secondary press M2 max and the maximum material level L2max of the secondary press; first determine the current I of the secondary press motor measured by the current sensor of the secondary press motor M2 Is it greater than or equal to I M2 max, and judging whether the secondary press material level L2 measured by the secondary press material level sensor group is greater than or equal to L2max;

[0030] When any one of the two conditions is met, the press speed control module controls the target angular velocity of the secondary press motor. equal That is, when I M2 ≥I M2 max or L2 ≥ L2max,

[0031] When both conditions are not met, the press speed control module receives the actual angular velocity of the first-stage press motor measured by the angular velocity sensor of the first-stage press motor. The current I of the first-stage press motor measured by the first-stage press motor current sensor M1 , and combined with the current I of the secondary press motor measured by the secondary press motor current sensor M2 , calculate the target angular velocity of the secondary press motor The calculation method is: K d2 =1.5;

[0032] Get the target angular velocity of the secondary press motor After that, the press speed control module will The speed control cabinet of the secondary press motor is used to adjust the angular velocity of the secondary press motor. The angular velocity sensor of the secondary press motor measures the actual angular velocity of the secondary press motor. Close to

[0033] Similarly, the speed adjustment method of the n-stage press is as follows: the maximum angular velocity of the n-stage press motor is preset in the press speed control module Maximum current I of the motor of the n-stage press Mn max and n-stage press maximum material level L n max; first determine the current I of the n-stage press motor measured by the n-stage press motor current sensor Mn Is it greater than or equal to I Mn max, and determine the n-stage press material level L measured by the n-stage press material level sensor group n Is it greater than or equal to L? n max;

[0034] When any one of the two conditions is met, the press speed control module controls the target angular velocity of the n-stage press motor. equal That is, when I Mn ≥I Mn max or L n ≥L n When max,

[0035] When both conditions are not met, the press speed control module receives the actual angular velocity of the (n-1) level press motor. and the current I of the (n-1)-stage press motor M(n-1) , and combined with the current I of the n-stage press motor measured by the n-stage press motor current sensor Mn , calculate the target angular velocity of the n-stage press motor The calculation method is: n>2;K dn =1.5;

[0036] Get the target angular velocity of the n-stage press motor After that, the press speed control module will The speed control cabinet of the n-stage press motor is used to adjust the angular velocity of the n-stage press motor. The angular velocity sensor of the n-stage press motor measures the actual angular velocity of the n-stage press motor. Close to

[0037] Where K d2 and K dn All are set values ​​and are related to the mechanical properties of the press.

[0038] According to the method of Example 2, when a four-stage press is used, the light conversion degree of the bagasse of the four-stage press reaches 2.0%; the moisture content of the bagasse reaches 47%; when a five-stage press is used, the light conversion degree of the bagasse of the five-stage press reaches 1.8%; the moisture content of the bagasse reaches 47%.

[0039] Example 3

[0040] A working method of an intelligent squeezing control system for squeezing juice in a sugar factory, compared with Example 2, except K d2 and K dn Except that the value of is different from that in Example 2, the other features are the same as those in Example 2. Specifically, K d2 =0.9, K dn =0.9.

[0041] According to the method of Example 3, when a four-stage press is used, the light conversion degree of the bagasse of the four-stage press reaches 2.2%; the moisture content of the bagasse reaches 48%; when a five-stage press is used, the light conversion degree of the bagasse of the five-stage press reaches 2.0%; the moisture content of the bagasse reaches 48%.

[0042] Example 4

[0043] A working method of an intelligent squeezing control system for squeezing juice in a sugar factory, compared with Example 2, except Kd2 and K dn Except that the value of is different from that in Example 2, the other features are the same as those in Example 2. Specifically, K d2 =2, K dn =2.

[0044] According to the method of Example 4, when a four-stage press is used, the light conversion degree of the bagasse of the four-stage press reaches 2.1%; the moisture content of the bagasse reaches 48%; when a five-stage press is used, the light conversion degree of the bagasse of the five-stage press reaches 1.9%; the moisture content of the bagasse reaches 48%.

[0045] By adopting the traditional way of operating the control systems of each level of the press independently, if a four-stage press is used for pressing, the light conversion degree of the bagasse of the four-stage press is greater than 2.5%; the moisture content of the bagasse is greater than 50%; if a five-stage press is used for pressing, the light conversion degree of the bagasse of the five-stage press is greater than 2.2%; the moisture content of the bagasse is greater than 50%.

[0046] Conversion and bagasse moisture are important parameters for the pressing process. The lower the conversion, the more completely the sugar is squeezed out, which helps to increase sugar production. Bagasse is often used as a raw material for sugar factories to achieve waste utilization, energy conservation and environmental protection. However, when the moisture content of bagasse is greater than 50%, the combustion effect is poor, and it is even necessary to purchase additional bagasse as a supplementary fuel. The present invention can reduce the moisture content of bagasse to less than 48%, which has a good combustion effect and helps sugar factories reduce fuel costs. In addition, the residual sugar in the bagasse forms colloid when burned and needs to be cleaned regularly. The present invention can reduce the conversion of the four-stage press to less than 2.2%, and the conversion of the five-stage press to less than 2.0%, which can effectively reduce the number of cleaning times and further reduce production costs.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A working method of an intelligent squeezing control system for squeezing juice in a sugar factory, the control system comprising a squeezing machine speed control module and a squeezing machine control system; the squeezing machine control system comprises several levels of squeezing machine control subsystems; the squeezing machine speed control module is connected to all levels of squeezing machine control subsystems; each level of squeezing machine control subsystem comprises a squeezing machine motor current sensor, a squeezing machine motor speed regulating cabinet, a squeezing machine material level sensor group and a squeezing machine motor angular velocity sensor; the squeezing machine material level sensor group comprises several material level sensors; the squeezing machine motor speed regulating cabinet is a frequency converter or a DC speed regulator; the characteristics are: The speed adjustment method for the secondary and subsequent presses is: The speed adjustment method of the secondary press is as follows: the maximum angular velocity of the secondary press motor is preset in the press speed control module. Maximum current I of the secondary press motor M2 max and the maximum material level L2max of the secondary press; first determine the current I of the secondary press motor measured by the current sensor of the secondary press motor M2 Is it greater than or equal to I M2 max, and judging whether the secondary press material level L2 measured by the secondary press material level sensor group is greater than or equal to L2max; When any one of the two conditions is met, the press speed control module controls the target angular velocity of the secondary press motor. equal That is, when I M2 ≥I M2 max or L2 ≥ L2max, When both conditions are not met, the press speed control module receives the actual angular velocity of the first-stage press motor measured by the angular velocity sensor of the first-stage press motor. The current I of the first-stage press motor measured by the first-stage press motor current sensor M1 , and combined with the current I of the secondary press motor measured by the secondary press motor current sensor M2 , calculate the target angular velocity of the secondary press motor The calculation method is: 0.9≤K d2 ≤2; Get the target angular velocity of the secondary press motor After that, the press speed control module will The speed control cabinet of the secondary press motor is used to adjust the angular velocity of the secondary press motor. The angular velocity sensor of the secondary press motor measures the actual angular velocity of the secondary press motor. Similarly, the speed adjustment method of the n-stage press is as follows: the maximum angular velocity of the n-stage press motor is preset in the press speed control module Maximum current I of the motor of the n-stage press Mn max and n-stage press maximum material level L n max; first determine the current I of the n-stage press motor measured by the n-stage press motor current sensor Mn Is it greater than or equal to I Mn max, and determine the n-stage press material level L measured by the n-stage press material level sensor group n Is it greater than or equal to L? n max; When any one of the two conditions is met, the press speed control module controls the target angular velocity of the n-stage press motor. equal That is, when I Mn ≥I Mn max or L n ≥L n When max, When both conditions are not met, the press speed control module receives the actual angular velocity of the (n-1) level press motor. and the current I of the (n-1)-stage press motor M(n-1) , and combined with the current I of the n-stage press motor measured by the n-stage press motor current sensor Mn , calculate the target angular velocity of the n-stage press motor The calculation method is: n>2; 0.9≤K dn ≤2； Get the target angular velocity of the n-stage press motor After that, the press speed control module will The speed control cabinet of the n-stage press motor is used to adjust the angular velocity of the n-stage press motor. The angular velocity sensor of the n-stage press motor measures the actual angular velocity of the n-stage press motor. Where K d2 and K dn All are set values.

2. The working method of the intelligent squeezing control system for squeezing juice in a sugar factory according to claim 1, characterized in that: Each level of the press control subsystem also includes a press alarm light.

3. The working method of the intelligent squeezing control system for squeezing juice in a sugar factory according to claim 2, characterized in that: Each level of the press control subsystem also includes a press buzzer.

4. The working method of the intelligent squeezing control system for squeezing juice in a sugar factory according to claim 1, characterized in that: The K d2 The value of K is 1.5; dn The value of is 1.5.

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