Automatic sugar boiling control system for synchronous timing measurement and control of double brix instruments arranged in sugar refinery

Abstract

The utility model discloses an automatic sugar boiling control system for synchronous timing measurement and control of equipment double brix instruments in a sugar refinery, which relates to the technical field of sugar boiling and comprises a sugar boiling tank, a massecuite liquid level line is arranged at the upper end in the tank, massecuite in production is arranged below the massecuite liquid level line in the sugar boiling tank, and the sugar boiling tank is connected with the sugar refinery. A computer automatic control system is arranged outside the sugar boiling tank body, a first steam chamber, a steam drum and a second steam chamber are sequentially arranged inside the sugar boiling tank body from top to bottom, and a microwave brix instrument and a refraction brix instrument are installed on the tank wall of the sugar boiling tank body in a flange mode. Probes of the microwave brix instrument and the refraction brix instrument penetrate through the tank wall of the sugar boiling tank body to make contact with massecuite in the sugar boiling tank body, and the microwave brix instrument and the refraction brix instrument are electrically connected with an external computer automatic control system through signal cables. In the sugar boiling process, the total brix of instant massecuite and the brix of mother liquor in the massecuite can be detected, adjusted and controlled online at the same time, so that a better sugar boiling effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sugar boiling, in particular to a sugar boiling automatic control system equipped with a double hammer instrument for synchronous timing measurement and control in a sugar factory. Background Art

[0002] This new product is mainly used in the sugar boiling automatic control system of the sugar boiling tank in sugar cane (or beet, refined sugar) sugar factories to boil various types of sugar paste (including but not limited to A, B, C sugar paste and seed paste in sugar cane sugar factories, or one-sand, two-sand, three-sand sugar paste and seed paste in beet sugar factories, or A sugar paste, B sugar paste, C sugar paste and related seed paste in raw sugar factories, or R1~R6 sugar paste in refined sugar factories).

[0003] Prior art product structure: In the existing sugar boiling automatic control system device currently implemented by sugar factories, the instrument used for online (real-time) detection of the total Brix of sugar paste during sugar boiling is a microwave hammer; the instrument used for online (real-time) detection of the Brix of the mother liquor of sugar paste during sugar boiling is a refractometer; thus, a sugar boiling automatic control system with two modes for measuring and controlling the concentration of sugar paste is formed and equipped: the first sugar boiling automatic control mode is equipped with only a microwave hammer, which is used to measure and control the total Brix of sugar paste; the second sugar boiling automatic control mode is equipped with only a refractometer, which is used to measure and control the Brix of the mother liquor of sugar paste (and then converted and derived into the measurement and control of the supersaturation of the mother liquor);

[0004] The microwave hammer meter or the refractometer hammer meter is installed on the wall of the sugar boiling tank container in the form of a flange (DN80-200). The inner end of the tank wall is the detection control head, which is in direct contact with the sugar paste (syrup) in the sugar boiling tank; the outer end of the tank wall is the related cables and conversion instruments, which are connected to the PLC or DCS computer automatic control system (hereinafter referred to as "computer automatic control system") to carry out automatic measurement and control with the associated software;

[0005] Since the above two modes only use one of the two hammer meters, they can be called "sugar boiling automatic control system with single hammer meter", that is, single hammer mode.

[0006] The working principle of the prior art can be briefly described as follows:

[0007] Overview: During the sugar boiling process in the sugar factory, the most critical massecuite condition is the concentration of massecuite, which is specifically manifested in two key parameters:

[0008] The first is the total Brix of massecuite [commonly known as the Brix of massecuite, which includes the total concentration of the mixture of sucrose granules and the concentrated syrup (commonly known as the mother liquor of massecuite in the industry) - refers to the concentration of the total solid solution content, measured in Brix ( 0Bx) as the unit], the specific automatic control application in production is to use only microwave hammer meter for measurement and control (i.e. forming one of the single hammer mode);

[0009] Second, the mother liquor in the sugar mass can be measured by the Brix ( 0 Bx) as a unit and directly displayed on the computer, and further converted and derived into the supersaturation α of the mother liquor and further displayed on the computer; this mother liquor concentration does not include the hammer of the sucrose sand in the sugar masseze]; the specific automatic control application in production is to use only the refractometer for measurement and control (i.e., forming the second single hammer mode); the following is basically based on the mother liquor supersaturation for related expressions;

[0010] The microwave hammer meter and the refractometer have completely different working principles and different detection parameters. Therefore, they cannot replace each other in the measurement and control of the sugar boiling process. That is, the microwave hammer meter cannot measure and control the supersaturation of the mother liquor, and the refractometer cannot measure and control the total hammer of the sugar paste.

[0011] In the sugar industry, the key to the quality of sugar boiling is to monitor the total hammer degree of sugar massecuite and the supersaturation of mother liquor simultaneously (synchronous timing) through manual judgment (or instrument detection), so as to ensure that the total hammer degree of sugar massecuite and the supersaturation of mother liquor are synchronized and timed within the appropriate process index data range, so as to achieve the best working conditions of each relevant stage of sugar boiling process (good convection of sugar massecuite, good absorption of sugar by crystals, fast sugar boiling speed, no pseudocrystal or waste sand, etc.), and obtain the best sugar boiling effect (including high sugar extraction rate, low steam consumption, low water consumption, etc.);

[0012] The existing technology uses a single hammer measurement and control instrument to control the sugar boiling automatic control system, which mainly has the following two modes:

[0013] Mode 1 is (only) using the microwave hammer meter mode: the microwave hammer meter 2 detects the total hammer of the instant sugar paste in the sugar boiling tank 1 online ( 0 Bx) and transmits the relevant signals to the computer automatic control system A and the operation interface display. Through the appropriate and timely measurement and control of the total hammer degree of the sugar mass, the automatic control operation process of sugar boiling can be partially completed, and the automatic control operation with certain effects can be achieved; however, this mode cannot synchronously detect the hammer degree of the sugar mass mother liquor, and it is also impossible to measure and control the supersaturation of the mother liquor. Mode 1 is the most commonly used single hammer mode sugar boiling automatic control system;

[0014] Mode 2 is (only) using the refractometer hammer mode: the refractometer hammer 3 detects the hammer degree of the mother liquor in the instant sugar paste in the sugar boiling tank 1 online (i.e., the concentration of the solid solution content in the mother liquor), and transmits the relevant signal to the computer automatic control system B and the operation interface display, and converts and derives it into the mother liquor supersaturation α, and then displays it on the operation interface. Through appropriate and timely measurement and control of the supersaturation of the sugar paste mother liquor, the automatic control sugar boiling operation process can be partially completed, and the automatic control operation also has a certain effect; but this mode cannot synchronously measure and control the total hammer degree of the sugar paste. Mode 2 is a single hammer mode sugar boiling automatic control system that is currently less used;

[0015] The existing technology (single hammer mode) can automatically control the change of the total hammer degree of sugar massecuite (or mother liquor supersaturation α) to a certain extent in the control stages of syrup concentration, crystallization, solid crystal of sugar massecuite, crystal growth (boiling), water boiling, concentration, etc. according to the characteristics of sugar massecuite changes during sugar boiling process. However, it has the following two main disadvantages:

[0016] When only the microwave hammer meter mode is used, because only the total hammer of the sugar massecuite at each stage can be measured and controlled, but the supersaturation α of the mother liquor corresponding to each stage cannot be measured and controlled synchronously and timely, the immediate overall quality of the sugar massecuite may be in a poor state. For example, in the stage of boiling the sugar massecuite, when the total hammer of the sugar massecuite is low, the system will automatically stop feeding or feed less and continue to feed steam for concentration to increase the total hammer of the sugar massecuite. However, the low total hammer of the sugar massecuite at this time does not mean that the supersaturation α of the mother liquor is too low, but it is possible that the supersaturation α is too high. If only steam concentration is fed at this time without appropriately increasing the feed or even adding water (commonly known as boiling water), the supersaturation α will continue to increase and cause pseudocrystals (one of the serious abnormal operating conditions). For example, in the stage of massecuite concentration, when the total hammer degree of massecuite is high and reaches the sugar release index, the system will automatically start the sugar release operation, but the supersaturation of the mother liquor may still be relatively high at this time, that is, there is still a lot of sugar in the mother liquor that has not been crystallized and extracted as much as possible. If the sugar is automatically released at this time, the sugar extraction rate will be reduced, and thus the best sugar boiling effect cannot be ensured; (that is to say, if it is judged according to manual operation at this time, the water should continue to be boiled to continue to absorb sugar for a certain period of time before adding sugar, so as to ensure a higher sugar extraction rate);

[0017] When only the refractometer mode is used, only the supersaturation α of the mother liquor of the sugar massecuite at each stage can be measured and controlled, but the total hammer of the sugar massecuite corresponding to each stage cannot be measured and controlled synchronously and timely, resulting in the overall quality of the sugar massecuite being in a poor state. For example, in the crystal growth stage of the sugar massecuite, when the supersaturation of the mother liquor is low, the system will automatically increase the feed to supplement the syrup to increase the sugar content and processing capacity. However, the supersaturation α at this time is low, which does not mean that the total hammer of the sugar massecuite is high, but it is possible that the total hammer of the sugar massecuite is low. If the feed is increased at this time, it is a wrong operation, which makes the total hammer of the sugar massecuite lower, resulting in poor convection (one of the abnormal working conditions) and brings hidden dangers such as more difficulty in absorbing sugar in subsequent refining. For example, in the crystal growth stage of sugar massecuite, when the supersaturation α of the mother liquor is detected to be too high, the existing system will automatically start the operation of increasing the feed (because the system determines that the total hammer of the sugar massecuite is also too high). However, in the actual working condition, the supersaturation α of the mother liquor is too high, while the total hammer of the sugar massecuite may be too low. Therefore, if the feed is increased to reduce the supersaturation, the total hammer of the sugar massecuite will be reduced (which is an erroneous operation caused by the system's automatic control misjudgment). This will lead to a lower total hammer of the sugar massecuite, poor convection (one of the abnormal working conditions) and bring hidden dangers such as slow sugar absorption speed or even difficulty in absorption in subsequent refining. For this reason, we propose that the sugar mill be equipped with a sugar boiling automatic control system with dual hammer meters for synchronous timing measurement and control; Utility Model Content

[0018] The technical problem to be solved by the utility model is to overcome the existing defects and provide a sugar-boiling automatic control system equipped with a double hammer instrument for synchronous timing measurement and control in a sugar factory, which can simultaneously use online detection and adjustment of the total hammer of the instant sugar paste and the supersaturation α of the mother liquor in the sugar paste during the sugar boiling process to achieve a better sugar boiling effect, and can effectively solve the problems in the background technology.

[0019] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a sugar-boiling automatic control system for a sugar-making factory equipped with a double-hammer instrument synchronous timing measurement and control, comprising a sugar-boiling tank body, a sugar-boiling tank liquid level line is arranged at the upper end of the interior of the tank body, sugar paste is arranged below the sugar-boiling tank liquid level line inside the sugar-boiling tank body, a computer automatic control system is arranged outside the sugar-boiling tank body, a steam chamber 1, a steam drum and a steam chamber 2 are arranged in sequence from top to bottom inside the sugar-boiling tank body, a microwave hammer meter and a refractometer are installed on the tank wall or tank bottom of the sugar-boiling tank body in the form of a flange, the probes of the microwave hammer meter and the refractometer both pass through the tank wall or tank bottom of the sugar-boiling tank body to contact the sugar paste therein, and the microwave hammer meter and the refractometer are both electrically connected to the external computer automatic control system by signal cables.

[0020] The microwave hammer meter and the refractometer are each installed in a good convection area of ​​the massecuite, and can be installed on the tank wall or the tank bottom.

[0021] Compared with the prior art, the utility model has the following beneficial effects: the sugar factory is equipped with a sugar boiling automatic control system with dual hammer meters for synchronous timing measurement and control, which has the following advantages:

[0022] 1. The new product can process the total hammer degree of the cooked sugar mass and the supersaturation of the mother liquor synchronously and timely, and can 3 ) each with its own emphasis, and effectively control the total hammer of sugar paste (code 0 Bx) and mother liquor supersaturation (code α), and then monitor and control the dynamic working conditions of sugar massecuite cooking by coordinated operation and complementary data processing, including but not limited to the supersaturation α point of powder feeding, boiling water tightening, vacuum degree / temperature, feed amount, (gradual concentration) crystal growth, low α point before sugar addition and high 0 Bx point, etc., to ensure that the instant working conditions of the sugar paste can be accurately controlled at a high crystallization rate and a standard total Brix state of the sugar paste and effectively avoid the generation of pseudo-crystals or waste sand, so as to achieve a better sugar boiling effect;

[0023] 2. During the cooking stage of the massecuite, when the total hammer degree of the massecuite is low, the system detects a low 0 Bx value, at the same time, the system synchronously detects the supersaturation α value of the sugar paste mother liquor, the system processes these two data in a coordinated manner, and then outputs complementary automatic control operation instructions: Working condition E is [ 0 If the Bx value is low, but the α value is also low, the operating instruction will be given to stop feeding and not add water to simply collect the concentrated sugar paste. 0 If the Bx value is too low but the α value is too high, the operation instruction of stopping feeding and adding water to perform "boiling water" operation will be given to tighten and concentrate the sugar paste. Through the output operation of these two instructions, an excellent sugar boiling effect can be achieved, that is, good convection is maintained, high-speed crystallization is achieved without generating pseudocrystals or waste sand, etc.

[0024] 3. During the crystal growth stage of the sugar massecuite, when the supersaturation of the mother liquor is detected to be high, the system detects a higher α value. At the same time, the system synchronously detects the total hammer value of the sugar massecuite. 0 Bx value, the system processes these two data in a coordinated manner, and then outputs complementary automatic control operation instructions: Working condition M is [α value is high, but 0 Bx value is also high], the priority will be given to increase the material input and temporarily stop adding water, so that the sugar paste can be gradually tightened to appropriately reduce the α value and appropriately reduce the 0 The purpose of good sugar paste working condition of Bx value; working condition N is [α value is high, but 0If the Bx value is too low, the system will give the instruction to stop feeding, but at the same time, add water to perform the "boiling water" operation to gradually tighten and concentrate the sugar paste. Through the output operation of these two instructions, an excellent sugar boiling effect can be achieved, which not only promotes the maintenance of good convection and high-speed crystallization without generating pseudocrystals or waste sand, etc.

[0025] 4. This new product can use a microwave hammer meter and a refractometer to simultaneously detect the total hammer of instant sugar masse and the supersaturation α of the mother liquor in the sugar masse during the sugar boiling process. The total hammer of sugar masse and the supersaturation α of the mother liquor can be processed synchronously and accurately to achieve a better sugar boiling effect. The processing effect is significantly higher than that of existing technical products. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a sugar-boiling automatic control system equipped with a synchronous timing double hammer measurement and control instrument according to the utility model;

[0027] Figure 2 It is a schematic diagram of the structure of a sugar-boiling automatic control system equipped with a microwave hammer meter in the prior art;

[0028] Figure 3 The present invention is a schematic diagram of the structure of a sugar-boiling automatic control system equipped with a refractometer in the prior art.

[0029] In the figure: 1 sugar boiling tank body, 11 steam chamber 1, 12 steam drum, 13 steam chamber 2, 2 microwave hammer meter, 3 refractometer hammer meter, 4 computer automatic control system, 5 sugar boiling tank liquid level line, 6 sugar paste. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-3, this embodiment provides a technical solution: To achieve the above purpose, the utility model provides the following technical solution: a sugar factory is equipped with a double hammer instrument synchronous timing measurement and control sugar boiling automatic control system, including a sugar boiling tank body 1, a sugar boiling tank liquid level line 5 is arranged at the upper end of the tank body 1, and a sugar paste 6 is arranged below the sugar boiling tank liquid level line 5 inside the sugar boiling tank body 1 during production, a computer automatic control system 4 is arranged outside the sugar boiling tank body 1, and a steam chamber 11, a steam drum 11 are arranged in sequence inside the sugar boiling tank body 1 from top to bottom. 12 and steam chamber 2 13, a microwave hammer 2 and a refractometer 3 are installed on the tank wall or tank bottom of the sugar boiling tank body 1 in the form of a flange, the probes of the microwave hammer 2 and the refractometer 3 both pass through the tank wall of the sugar boiling tank body 1 to contact the sugar paste 6 inside it, the microwave hammer 2 and the refractometer 3 are both electrically connected to the external computer automatic control system 4 through signal cables, and the microwave hammer and the refractometer are each installed in a good convection area of ​​the sugar paste, and can be installed on the tank wall or the tank bottom.

[0032] The working principle of the sugar boiling automatic control system provided by the utility model for the sugar factory equipped with double hammer meters for synchronous timing measurement and control is as follows: during the sugar boiling process, the microwave hammer meter 2 is used to online detect the total hammer of the instant sugar paste in the sugar boiling tank 1 ( 0 Bx) and transmit the relevant signals to the computer automatic control system 4 for data processing and operation interface display; at the same time, the refractometer 3 is used to detect the mother liquor brix in the instant sugar massecuite online, and the relevant signals are transmitted to the computer automatic control system 4 for data processing, conversion and calculation to derive the mother liquor supersaturation α, and display it on the operation interface. The compilation idea of ​​the control software should consider the respective action principles and interaction principles of the total brix of sugar massecuite and the mother liquor supersaturation at the same time, that is, when the system processes the data, the total brix of sugar massecuite and the mother liquor supersaturation are synchronously and synchronously processed with complex and precise techniques to complement each other, and at different cooking stages (such as different liquid levels m 3 ) Each focuses on joint control of the total hammer of sugar paste (code 0 Bx) and mother liquor supersaturation (code α), and coordinate operation and monitoring of the dynamic conditions of sugar massecuite cooking, including but not limited to the supersaturation point of powder feeding, boiling water tightening, vacuum degree / temperature, feed amount, (gradual concentration) crystal growth, low α point before sugar addition and high 0 Bx point, etc., to ensure that the instant working conditions of the sugar paste can be accurately controlled at a high crystallization rate and a standard total hammer degree of the sugar paste and effectively avoid the generation of pseudo-crystals or waste sand, so as to achieve a better sugar boiling effect.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. The sugar factory is equipped with a sugar boiling automatic control system with dual hammer meters for synchronous timing measurement and control. Features: The invention comprises a sugar boiling tank (1), wherein a sugar boiling tank liquid level line (5) is arranged at the upper end of the interior of the sugar boiling tank (1), and sugar paste (6) being produced is arranged below the sugar boiling tank liquid level line (5) inside the sugar boiling tank (1), and a computer automatic control system (4) is arranged outside the sugar boiling tank (1), and a steam chamber 1 (11), a steam drum (12) and a steam chamber 2 (13) are arranged in sequence from top to bottom inside the sugar boiling tank (1), and a microwave hammer (2) and a refractometer (3) are installed on the tank wall of the sugar boiling tank (1) in the form of a flange, and the probes of the microwave hammer (2) and the refractometer (3) both pass through the tank wall of the sugar boiling tank (1) and contact the sugar paste (6) inside the sugar boiling tank (1), and the microwave hammer (2) and the refractometer (3) are both electrically connected to the external computer automatic control system (4) through signal cables.

Images