CN205269650U - Reation kettle with temperature control system - Google Patents

Abstract

The utility model discloses a reation kettle with temperature control system, especially a reation kettle with temperature control system who is used for preparing eutectic maltitol and sorbitol. The utility model discloses a reation kettle will filter with the operation integration of crystallization in a reation kettle, improved reation kettle's utilization efficiency greatly, simplified the production facility. The utility model discloses a taking out vacuum filters, effectively having got rid of the impurity in the raw materials, simultaneously, it also is under the vacuum state to stir off after the filtration evacuation, therefore reation kettle connects the effect that the vacuum pump can reach continuous use.

Description

A kind of reactor with temperature control system

Technical field

This utility model relates to a kind of reactor with temperature control system, particularly relates to a kind of reactor with temperature control system for preparing eutectic maltose alcohol and sorbitol, belongs to sugar industry control field.

Background technology

Reactor is widely used chemical industry equipment in chemical process, also it is prepare eutectic maltose alcohol and the requisite production equipment of sorbitol, existing reactor equipment is complex, generally require plurality of devices collaborative work could realize, causing whole production line length, the technological parameter of links is difficult to be controlled effectively, and eutectic difficult quality is guaranteed, and equipment cost is high, and result of use is unsatisfactory. Meanwhile, chemical production processes belongs to the course of reaction of heat release, if removing reaction heat not in time, it will causes reaction acutely so that temperature is beyond normal range, easily causes " implode " or produce safe valve bounce. The quality that temperature of reaction kettle controls directly affects production efficiency and product quality, and temperature is precisely controlled the key link being to ensure that production quality. Therefore, to the improvement of reactor and innovate imperative.

Maltose alcohol, has another name called hydrogenated maltose, and chemical name is 4-O-alpha-D-glucose base-D-glucitol, and molecular formula is C₁₂H₂₄O₁₁, relative molecular mass is 344.31, is a kind of novel functional sweetener. There is due to it multiple physiological propertys such as the absorption of dental caries low in calories, non-, indigestible, promotion calcium, caused the extensive concern of people. The sugariness of maltose alcohol is the 85%��95% of sucrose, but calorific value is only the 5% of sucrose, and therefore maltose alcohol will not raise blood glucose, does not increase cholesterol, is the desirable sweeting agent of remedy diet. Meanwhile, maltose alcohol has the features such as thermostability, acid resistance, moisture retention and non-fermented, does not substantially play Maillard reaction. Not digested absorption in vivo, it is also possible in infant foods, in case children caries. Therefore, maltose alcohol is a kind of excellent sucrose succedaneum, has huge potentiality to be exploited and application prospect.

Maltose alcohol is white crystalline powder or water white neutral thick liquid, and soluble in water, insoluble in methanol and ethanol, hygroscopicity is very strong, and common commercialization maltose alcohol is maltitol syrup, is difficult to meet multiple demand.

Sorbitol is also functional sweetener, and widely, its ��-crystalline sorbitol has good hardness and relatively low moisture absorption to purposes. Research shows, sorbitol can with other alcohols cocrystallization thus solving the easy moisture absorption of part alcohols, the problems such as hardness is low. But there is presently no the relevant report for maltose alcohol eutectic.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of reactor with temperature control system, this reactor can improve the utilization ratio of reactor, simplify production equipment, solves the technical problem that the easy moisture absorption of maltose alcohol, the control of eutectic process temperature and the equipment of production are complicated.

To achieve these goals, this utility model be the technical scheme is that a kind of reactor with temperature control system, including kettle, described kettle inner top is provided with dissolving tank, kettle is provided with and the material feeding tube of dissolving tank intracavity inter-connection, the bottom surface of dissolving tank has uniform filtering holes, the lower surface of dissolving tank bottom surface is coated with convertible sealing plate, kettle is provided with and stretches out that kettle is outside and vacuum-pumping tube with kettle intracavity inter-connection and crystal seed feed pipe, vacuum-pumping tube stretches out one end of kettle and is connected with vacuum pump, the bottom of kettle is provided with the discharge nozzle with its intracavity inter-connection and agitator, agitator stretches out one end of kettle and is connected with the second motor, the outer wall of kettle is provided with chuck, chuck is respectively arranged with medium entrance and media outlet.

Described sealing plate is contained in the lower section of the bottom surface of dissolving tank through rotating shaft, and one end of rotating shaft is connected with the first motor, constitutes the convertible on-off structure of filtering holes.

The filtering holes aperture of described dissolving tank bottom surface is 30-50 ��m.

Being provided with valve on described material feeding tube, crystal seed feed pipe and discharge nozzle, valve respectively opens and closes the first valve of material feeding tube, opens and closes the second valve of crystal seed feed pipe and open and close the 3rd valve of discharge nozzle.

Described material feeding tube has 3, respectively for the first feed pipe of maltose alcohol charging, for the second feed pipe of sorbitol charging and the 3rd feed pipe for adding water, material feeding tube is provided with the first flow sensor for detecting feed rate.

The bottom of described dissolving tank cavity is provided with the first temperature sensor for detecting solution temperature; The bottom of described kettle cavity is provided with the second temperature sensor for detecting solution temperature.

Described medium entrance and media outlet respectively thermal medium inlet, thermal medium outlet, cold medium entrance, cold media outlet.

Described thermal medium inlet is provided with the second flow sensor for detecting thermal medium flow and controls the thermal medium electromagnetic valve of thermal medium flow; Described cold medium entrance is provided with the 3rd flow transducer for detecting cold rate-of flow and controls the cold medium electromagnetic valve of cold rate-of flow.

This utility model beneficial effect

(1) adopt this utility model reactor to prepare eutectic maltose alcohol and sorbitol, be the character for maltose alcohol and feature, by maltose alcohol and sorbitol eutectic, obtain a kind of eutectic maltose alcohol and sorbitol. This eutectic has non-hygroscopic, hardness high, efficiently solves the easy moisture absorption of maltose alcohol, the problem not easily preserved, has good mechanical performance, it is adaptable to tabletting, meets the diverse requirements to maltose alcohol.

(2) compared with crystal maltitol or crystalline sorbitol, eutectic maltose alcohol and the hygroscopicity of sorbitol that employing this utility model reactor prepares significantly reduce, and hardness significantly improves.

(3) this utility model reactor is adopted to prepare the method for eutectic maltose alcohol and sorbitol simple, easy to operate, mechanization production can be adopted, it is easy to industrialization promotion, promote the popularization and application of maltose alcohol effectively, there is good Social and economic benef@.

(4) operation filtered with crystallization is integrated in a reactor by reactor of the present utility model, substantially increases the utilization ratio of reactor, simplifies production equipment. This utility model adopts vacuumizing filtration, effectively eliminates the impurity in raw material, and meanwhile, stirring off after filtering evacuation is also under vacuum conditions, and therefore reactor connects the effect that vacuum pump can reach to use continuously.

(5) reactor of the present utility model is the accurate control utilizing the temperature of reaction kettle control algolithm based on fuzzy neural network to realize reactor temperature, by the combination of hardware configuration and software configuration, staff only just need to can reach the accurate control of reactor temperature at control room. The method has automatic measure on line ability, self-adjusting ability, it is possible to accurately control temperature of reaction kettle, has good robustness. Meanwhile, it is capable to increase substantially the stability that temperature of reaction kettle controls, it is achieved accurately control, it is also possible to reduce in production process owing to temperature of reaction kettle controls the production of the not good enough wastage of material caused and substandard products, save cost, improve business efficiency.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.

Fig. 1 is the profile that this utility model has the reactor of temperature control system, in figure,

1 is kettle, 2 is dissolving tank, 2a is dissolving tank bottom surface, 3a is the first feed pipe, 3b is the second feed pipe, 3c is the 3rd feed pipe, 4 is chuck, 5 is discharge nozzle, 6a is the first valve, 6b is the second valve, 6c is the 3rd valve, 7 is rotating shaft, 8 is sealing plate, 9 is vacuum-pumping tube, 10 is vacuum pump, 11 is crystal seed feed pipe, 12a is thermal medium inlet, 13a is thermal medium outlet, 12b is cold medium entrance, 13b is cold media outlet, 14a is the first temperature sensor, 14b is the second temperature sensor, 15b is the second motor, 16 is agitator, 17a is first flow sensor, 17b is second flow sensor, 17c is the 3rd flow transducer, 18a is thermal medium electromagnetic valve, 18b is cold medium electromagnetic valve.

Fig. 2 is the structural representation of this utility model dissolving tank, in figure,

2 is dissolving tank, and 7 is rotating shaft, and 8 is sealing plate, and 15a is the first motor.

Fig. 3 is that the temperature of reaction kettle based on fuzzy neural network controls systematic schematic diagram.

Fig. 4 is that the temperature of reaction kettle based on fuzzy neural network controls system diagram, in figure,

19 is controlled device, and 20 is the learning algorithm of fuzzy neural network controller, and 21 is fuzzy neural network controller, and y (t) is the reactor temperature of actual measurement; R (t) is temperature of reaction kettle setting value; E (t) is temperature error between setting value and actual measured value in reactor; De (t)/d (t) is temperature error rate of change; U (t) is cold rate-of flow or thermal medium flow.

Fig. 5 is the structure chart of the temperature of reaction kettle control algolithm based on fuzzy neural network.

Detailed description of the invention

Below in conjunction with embodiment, detailed description of the invention of the present utility model is described in further detail.

Embodiment 1

A kind of reactor with temperature control system, with reference to Fig. 1, 2, including kettle, described kettle 1 inner top is provided with dissolving tank 2, kettle 1 is provided with and the material feeding tube of dissolving tank 2 intracavity inter-connection, described material feeding tube has 3, respectively for the first feed pipe 3a of maltose alcohol charging, for the second feed pipe 3b of sorbitol charging and the 3rd feed pipe 3c for adding water, material feeding tube is provided with the first flow sensor 17a for detecting feed rate, the bottom of described dissolving tank 2 cavity is provided with the first temperature sensor 14a for detecting solution temperature, the bottom surface 2a of dissolving tank 2 has uniform filtering holes, the lower surface of dissolving tank 2 bottom surface 2a is coated with convertible sealing plate 8, described sealing plate 8 is contained in the lower section of the bottom surface 2a of dissolving tank 2 through rotating shaft 7, one end of rotating shaft 7 is connected with the first motor 15a, constitute the convertible on-off structure of filtering holes, kettle 1 is provided with and stretches out that kettle 1 is outside and vacuum-pumping tube 9 with kettle 1 intracavity inter-connection and crystal seed feed pipe 11, vacuum-pumping tube 9 stretches out one end of kettle 1 and is connected with vacuum pump 10, the bottom of kettle 1 is provided with the discharge nozzle 5 with its intracavity inter-connection, described material feeding tube, crystal seed feed pipe 11 and discharge nozzle 5 are provided with valve, valve respectively opens and closes the first valve 6a of material feeding tube, open and close the second valve 6b of crystal seed feed pipe 11 and open and close the 3rd valve 6c of discharge nozzle 5, the bottom of kettle 1 is provided with the second temperature sensor 14b for detecting solution temperature and agitator 16, agitator 16 stretches out one end of kettle 1 and is connected with the second motor 15b, the outer wall of kettle 1 is provided with chuck 4, chuck 4 is respectively arranged with medium entrance and media outlet, described medium entrance and media outlet respectively thermal medium inlet 12a, thermal medium outlet 13a, cold medium entrance 12b, cold media outlet 13b, described thermal medium inlet 12a is provided with the second flow sensor 17b for detecting thermal medium flow and controls the thermal medium electromagnetic valve 18a of thermal medium flow, described cold medium entrance 12b is provided with the 3rd flow transducer 17c for detecting cold rate-of flow and controls the cold medium electromagnetic valve 18b of cold rate-of flow.

First flow sensor 17a, second flow sensor 17b, the 3rd flow transducer 17c, the first temperature sensor 14a, the second temperature sensor 14b all electrically connect with PLC; Thermal medium electromagnetic valve 18a and cold medium electromagnetic valve 18b all electrically connects with PLC; PLC is connected to alarm; PLC is connected with host computer by Ethernet.

With reference to Fig. 3-5, this utility model reactor utilizes the feed rate of sensor detection reactor, cold medium valve opening, thermal medium valve opening, cold rate-of flow, thermal medium flow and reactor temperature, and send detected value to PLC, detected value is sent to host computer by Ethernet by PLC, by configuration software by the feed rate of reactor in host computer, cold medium valve opening, thermal medium valve opening, cold rate-of flow, thermal medium flow and reactor temperature show in real time, alarm screen in host computer has alarm lamp, PLC is connected to alarm, when temperature of reaction kettle is not within normal range, alarm lamp in host computer and the same alarm of PLC.

The temperature of reaction kettle control algolithm based on fuzzy neural network used by reactor, comprises the following steps:

(1) determining input quantity and the output of fuzzy neural network controller, input quantity is temperature error and the temperature error rate of change of reactor, and output is cold medium valve opening and the thermal medium valve opening of reactor.

(2) structure of fuzzy neural network is determined, the empirical data that host computer accumulates in actual production process according to user, the introductory die fuzzy model of structure fuzzy neural network controller, empirical data includes the feed rate of reactor, cold medium valve opening, thermal medium valve opening, cold rate-of flow, thermal medium flow and reactor temperature; The input membership function of fuzzy neural network controller chooses Gaussian function.

(3), after the structure of fuzzy neural network is determined, parameter identification is carried out; Fuzzy neural network controller adopts the feed rate of reactor of collection in worksite, cold medium valve opening, thermal medium valve opening, cold rate-of flow, thermal medium flow and reactor temperature that fuzzy neural network controller is carried out parameter learning training.

(4) fuzzy neural network controller trained is built in PLC, fuzzy neural network controller adjusts the central value of membership function parameter, width value, PLC controls actuator according to fuzzy neural network controller and regulates controlled device, thus realizing being precisely controlled reactor temperature. Actuator is thermal medium electromagnetic valve 18a and cold medium electromagnetic valve 18b, and controlled device is the reactant in reactor.

Temperature of reaction kettle control algolithm based on fuzzy neural network is made up of Structure learning and parameter learning two parts. First, being determined the initiating structure of network by Structure learning, then recycling parameter learning determines the parameter of network. If the fuzzy partition number that fuzzy neural network respectively inputs component determines in advance, then need the parameter of study to be mainly the connection weight w of last layer_ijAnd the central value cij of the membership function of the second layer and width ��_ij. The learning algorithm of fuzzy neural network adopts error back propagation algorithm, First-order Gradient optimizing algorithm, adjusts the center connecting weights and membership function and the width of network.

The structure of fuzzy neural network controller, this structure is formed by 5 layers, wherein:

Ground floor is input layer, and each component xi of input vector is directly connected with each node, and the effect of this layer is by input value x=[x₁,x₂,...,x_n] it is sent to the second layer. The number of input variable is nodes: the input number of nodes n=2 of this controller, the respectively rate of change of temperature error and temperature error;

In the second layer, linguistic variable value is by each node on behalf, and effect is the membership function calculating each input componentWhereinThe dimension of input variable is n, input variable x_iFuzzy partition number be m_i. Adopt Gaussian function as membership function, namely

$u_i^j=e^{-\frac{{(x_i-c_{ij})}^2}{{\mathrm{\δ}}_{ij}}}$

Wherein, �� ij, cij represents width and the center of membership function respectively. The nodes of this layer

One fuzzy rule of each node on behalf in third layer, the former piece that effect is with fuzzy rule mates, and the relevance grade of every rule is calculated, namely

${\mathrm{\α}}_j=min\{u_1^{i_1},u_2^{i_2},\mathrm{...},u_n^{i_n}\}$

Wherein i₁��{1,2,��m₁},i₂��{1,2,��m₂},��,i_n��{1,2,��m_n},j��{1,2,��m},The nodes m of this layer. The degree of membership of given input linguistic variable value near input point is relatively big, and the degree of membership away from the linguistic variable value of input point is only small or be 0. When membership function only small (as less than 0.05), this value is approximate is taken as 0, and therefore, in ��, the output valve of most of nodes is 0.

The effect of the 4th layer is to realize normalization to calculate, and nodes is identical with the nodes of last layer, and computing formula is:

$\stackrel{\‾}{{\mathrm{\α}}_j}={\mathrm{\α}}_j/\underset{i=1}{\overset{m}{\Σ}}{\mathrm{\α}}_i,j=1,2,...,m$

Layer 5 is output layer, it is achieved sharpening calculates, namely

$y_i=\underset{j=1}{\overset{m}{\Σ}}{w}_{ij}{\stackrel{\‾}{\mathrm{\α}}}_j,i=1,2,...,r$

Wherein, w_ijRepresent y_iThe center of jth Linguistic Value membership function.

Claims (7)

1. a reactor with temperature control system, including kettle, it is characterized in that, described kettle (1) inner top is provided with dissolving tank (2), kettle (1) is provided with and the material feeding tube of dissolving tank (2) intracavity inter-connection, the bottom surface (2a) of dissolving tank (2) has uniform filtering holes, the lower surface of dissolving tank (2) bottom surface (2a) is coated with convertible sealing plate (8), kettle (1) is provided with and stretches out that kettle (1) is outside and vacuum-pumping tube (9) with kettle (1) intracavity inter-connection and crystal seed feed pipe (11), vacuum-pumping tube (9) stretches out one end of kettle (1) and is connected with vacuum pump (10), the bottom of kettle (1) is provided with the discharge nozzle (5) with its intracavity inter-connection and agitator (16), agitator (16) stretches out one end of kettle (1) and is connected with the second motor (15b), the outer wall of kettle (1) is provided with chuck (4), chuck is respectively arranged with medium entrance and media outlet on (4).

2. the reactor with temperature control system according to claim 1, it is characterized in that, described sealing plate (8) is contained in the lower section of the bottom surface (2a) of dissolving tank (2) through rotating shaft (7), one end of rotating shaft (7) is connected with the first motor (15a), constitutes the convertible on-off structure of filtering holes.

3. the reactor with temperature control system according to claim 1, it is characterized in that, being provided with valve on described material feeding tube, crystal seed feed pipe (11) and discharge nozzle (5), valve respectively opens and closes first valve (6a) of material feeding tube, opens and closes second valve (6b) of crystal seed feed pipe (11) and the 3rd valve (6c) of keying discharge nozzle (5).

4. the reactor with temperature control system according to claim 1, it is characterized in that, described material feeding tube has 3, respectively for first feed pipe (3a) of maltose alcohol charging, for second feed pipe (3b) of sorbitol charging and the 3rd feed pipe (3c) for adding water, material feeding tube is provided with the first flow sensor (17a) for detecting feed rate.

5. the reactor with temperature control system according to claim 1, it is characterised in that the bottom of described dissolving tank (2) cavity is provided with the first temperature sensor (14a) for detecting solution temperature; The bottom of described kettle (1) cavity is provided with the second temperature sensor (14b) for detecting solution temperature.

6. the reactor with temperature control system according to claim 1, it is characterized in that, described medium entrance and media outlet respectively thermal medium inlet (12a), thermal medium outlet (13a), cold medium entrance (12b), cold media outlet (13b).

7. the reactor with temperature control system according to claim 6, it is characterized in that, described thermal medium inlet (12a) is provided with the second flow sensor (17b) for detecting thermal medium flow and controls the thermal medium electromagnetic valve (18a) of thermal medium flow; Described cold medium entrance (12b) is provided with the 3rd flow transducer (17c) for detecting cold rate-of flow and controls the cold medium electromagnetic valve (18b) of cold rate-of flow.