CN215028791U - Neutralization reaction equipment is used in sodium alginate production - Google Patents

Abstract

The utility model provides a sodium alginate production is with neutralization reaction equipment. The utility model discloses a jar body and agitator, the agitator includes the motor, (mixing) shaft and sets up at the epaxial first stirring vane and stirring rake of stirring, the motor sets up in the top of the jar body, (mixing) shaft sets up and stretches out the jar body and be connected with the motor in the inside of the jar body and upper end, first stirring vane sets up and lies in the middle part of (mixing) shaft along the horizontal direction, the stirring rake is the arc and lies in the bottom of (mixing) shaft, the stirring rake is kiss and is close to the bottom of the jar body with the bottom of the jar body mutually, be equipped with the second stirring vane of a plurality of vertical upwards extensions on the stirring rake. The utility model discloses a stirrer that has two kinds of different stirring vane, first stirring vane has realized the stirring at jar body middle part, and second stirring vane has realized the stirring of jar body bottom, and the stirring is avoided appearing the material dead angle, and stirring effect is good, has fully satisfied the reaction requirement of the alginic acid solid that forms the insoluble product in the reaction process and sodium hydroxide liquid.

Description

Neutralization reaction equipment is used in sodium alginate production

Technical Field

The utility model relates to a sodium alginate production facility's technical field especially indicates a sodium alginate production is with neutralization reaction equipment.

Background

At present, in industry, the production of sodium alginate is made by reacting alginic acid solid with sodium hydroxide liquid. The reaction of alginic acid solid and sodium hydroxide liquid is acid-base neutralization reaction, which is a special acid-base neutralization reaction, wherein acid is solid, and base is liquid and is an aqueous solution formed by dissolving in water; in the reaction process, in order to facilitate the separation of the product sodium alginate, a high-concentration alcohol solution is also added; because the sodium alginate generated after the reaction is an insoluble substance in the alcohol solution, the reaction product can be conveniently and timely separated out by adding the high-concentration alcohol solution. Therefore, a solid-liquid mixture is always present in the reaction equipment of alginic acid solid and sodium hydroxide liquid.

In order to ensure the smooth proceeding of the above reaction, complete reaction and timely discharge the heat generated during the neutralization reaction, stirring is required during the reaction of the alginic acid solid and the sodium hydroxide liquid. Current acid-base neutralization reaction tower sets up the pivot in the inside of tower body, and the top of pivot is connected with the motor, and the pivot is located the inside part of tower body and is provided with stirring vane, and stirring vane is oval setting. The stirring blade in the acid-base neutralization reaction tower has a simple structure, so that the stirring effect is poor, and the stirring blade is only suitable for homogeneous reaction of all liquids; moreover, the stirring blade arranged in this way can also cause the formation of dead corners of materials in the reaction tower, especially the bottom of the reaction tower, and cannot meet the reaction requirement of alginic acid solid and sodium hydroxide liquid which form insoluble products in the reaction process.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sodium alginate production is with neutralization reaction equipment, thereby it leads to its stirring effect to be poor to result in the structure of stirring vane too simply in the acid-base neutralization reaction tower among the solution prior art and can't satisfy the problem that forms the alginic acid solid at insoluble product and the reaction requirement of sodium hydroxide liquid in the reaction process at material dead angle.

In order to solve the technical problem, the technical scheme of the utility model is so realized:

the neutralization reaction equipment for sodium alginate production of the utility model comprises a tank body and a stirrer; the top of the tank body is respectively provided with an alginic acid feed inlet, a sodium hydroxide feed inlet and an alcohol solution feed inlet, the bottom of the tank body is provided with a sodium alginate discharge port, and the outside of the tank body is sleeved with a cooling sleeve; the agitator includes motor, (mixing) shaft and sets up epaxial first stirring vane and stirring rake are stirred, the motor set up in the top of the jar body, the (mixing) shaft set up in stretch out in the inside of the jar body and upper end jar body and with the motor is connected, first stirring vane sets up and is located along the horizontal direction the middle part of (mixing) shaft, the stirring rake is the arc setting and is located the bottom of (mixing) shaft, the stirring rake with the bottom of the jar body is anastomotic mutually and is close to the bottom of the jar body, be equipped with the second stirring vane of a plurality of vertical upwards extensions on the first stirring rake.

In a preferred embodiment, the vertical plane of the second stirring blade and the vertical plane of the stirring paddle form an included angle of 45-60 degrees.

As a preferred embodiment, the second stirring blade is in a shape of any one or more of a spiral, an ellipse and a rectangle.

In a preferred embodiment, the number of the first stirring blades is multiple, and the multiple first stirring blades are arranged at intervals and in a staggered manner.

As a preferred embodiment, the first stirring blade is in a shape of any one or more of a spiral, an ellipse and a rectangle.

As a preferred embodiment, the bottom of the tank body is further provided with four support frames, and the four support frames are uniformly arranged along the circumferential direction of the tank body.

As a preferred embodiment, the support frame comprises a support column connected with the bottom of the tank body and a support plate arranged at the bottom of the support column for placing on the ground.

As a preferred embodiment, the top of the tank body is provided with an exhaust duct, and the exhaust duct is provided with a fan for exhausting the volatilized alcohol in the tank body.

As a preferred embodiment, the neutralization reaction equipment further comprises a controller, wherein a pH on-line detector is arranged on the tank body, and the pH on-line detector is electrically connected with the controller.

As a preferred embodiment, an alginic acid metering tank is connected above the alginic acid charging port, and a first weight controller is arranged on the alginic acid metering tank; a sodium hydroxide metering tank is connected above the sodium hydroxide feeding port, and a second weight controller is arranged on the sodium hydroxide metering tank; an alcohol solution metering tank is connected above the alcohol solution feeding port, and a third weight controller is arranged on the alcohol solution metering tank; the first weight controller, the second weight controller and the third weight controller are all connected with the controller.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an agitator that the (mixing) shaft that has two kinds of different positions and equidirectional stirring vane constitutes, first stirring vane has realized the stirring at jar body middle part, the stirring rake is identical with the bottom shape of the jar body, the stirring of jar body bottom has been realized to second stirring vane on the stirring rake, the stirring, jar internal all materials all are in the stirring in-process, avoid appearing the material dead angle, promoted going on of alginic acid solid and sodium hydroxide liquid reaction, the reaction has been guaranteed fully, and simultaneously, be favorable to appearing of reaction product sodium alginate, the stirring effect is good, fully satisfied the reaction requirement of alginic acid solid and sodium hydroxide liquid that forms the insoluble product in the reaction process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic sectional structural view of an embodiment of a neutralization reaction device for sodium alginate production provided by the present invention;

FIG. 2 is an enlarged schematic view of the structure of the agitator of FIG. 1;

FIG. 3 is an enlarged schematic view of the first stirring blade of FIG. 2;

FIG. 4 is an enlarged schematic view of the structure of the paddle of FIG. 2;

in the figure: 10-a tank body; 11-a cooling jacket; 111-a water inlet pipe; 112-a water outlet pipe; 12-sodium alginate discharging pipe; 13-alginic acid metering tank; 14-a fan; 16-sodium hydroxide metering tank; 17-an alcohol solution metering tank; 20-a first stirring blade; 30-stirring paddle; 31-a second stirring blade; 41-support column; 42-a support plate; 50-a motor; 60-stirring shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to the attached drawings 1, 2, 3 and 4, the utility model provides a neutralization reaction device for sodium alginate production, which is used for reacting alginic acid solid with sodium hydroxide liquid to form an insoluble product, namely sodium alginate, and the solid-liquid heterogeneous reaction is also insoluble. The neutralization reaction equipment for producing sodium alginate comprises a tank body 10 and a stirrer; an alginic acid feeding port, a sodium hydroxide feeding port and an alcohol solution feeding port are respectively arranged at the top of the tank body 10, a sodium alginate discharging port is arranged at the bottom of the tank body 10, and a cooling sleeve 11 is sleeved outside the tank body 10; adding alginic acid solid into the tank body 10 through an alginic acid feeding port, adding a sodium hydroxide aqueous solution, namely sodium hydroxide liquid, into the tank body 10 through a sodium hydroxide feeding port, adding an alcohol solution into the tank body 10 through an alcohol solution feeding port, wherein the concentration of the alcohol solution is high and is about 80-90% so as to ensure that sodium alginate, a product generated after reaction, is smoothly precipitated, and discharging the product (comprising sodium alginate, water and alcohol) after reaction in the tank body 10 through a sodium alginate discharging port; the agitator includes motor 50, the (mixing) shaft 60 and set up first stirring vane 20 and stirring rake 30 on the (mixing) shaft 60, motor 50 sets up in the top of the jar body 10, the (mixing) shaft 60 sets up in the inside of the jar body 10 and the upper end stretches out jar body 10 and is connected with motor 50, first stirring vane 20 sets up and lies in the middle part of (mixing) shaft 60 along the horizontal direction, stirring rake 30 is the arc setting and lies in the bottom of (mixing) shaft 60, stirring rake 30 is anastomotic with the bottom of the jar body 10 and is close to the bottom of the jar body 10, be equipped with a plurality of vertical second stirring vane 31 that upwards extend on the stirring rake 30. The utility model discloses a stirrer that (mixing) shaft 60 that has two kinds of different positions and equidirectional stirring vane constitutes, first stirring vane 20 has realized the stirring at jar body 10 middle part, the stirring of jar body 10 bottom has been realized to second stirring vane 31, the stirring, all materials all are in the stirring in-process in the jar body 10, avoid appearing the material dead angle, stirring effect is good, fully satisfied the alginic acid solid that forms the insoluble product among the reaction process and the reaction requirement of sodium hydroxide liquid.

Referring to fig. 1, 2 and 4, as a preferred embodiment, the second agitating blade 31 has any one or more of a spiral shape, an oval shape and a rectangular shape. The second stirring blade 31 with the spiral, oval and rectangular shape has a large stirring area and sufficient stirring force, so that the materials can be fully stirred. In general, the vertical plane of the second stirring blade 31 and the vertical plane of the stirring paddle 30 form an included angle of 45-60 degrees; the second stirring blade 31 which is obliquely arranged along the rotation direction of the stirring paddle 30 has a large action area with the materials in the stirring process, so that the materials can be fully stirred; meanwhile, the resistance is small in the stirring process, the energy consumption is low, and the service performance is good.

Referring to fig. 1, 2 and 3, as a preferred embodiment, the first stirring vanes 20 are plural, and the plural first stirring vanes 20 are spaced and arranged in a staggered manner; in the embodiment, 2 rows of first stirring blades 20 are shown, each row of first stirring blades 20 is 2, and the 2 rows of first stirring blades 20 are arranged in a non-coplanar vertical manner; of course, the first stirring vanes 20 may also be 2, 3, 5, or more; and the interval between two adjacent rows of first stirring blades 20 is set according to the height of the tank body 10, of course, 1 first stirring blade 20 may be set in each row, and the plurality of first stirring blades 20 are uniformly arranged along the circumferential direction of the stirring shaft 60. Preferably, like the second stirring blade 31, the first stirring blade 20 is also in any one or more of a spiral shape, an oval shape and a rectangular shape, and the first stirring blade 20 is a wide-edge stirring blade, which increases the contact area between the first stirring blade 20 and the material in the middle of the tank 10 and improves the stirring effect. Certainly, the plane where the first stirring blade 20 is located and the vertical plane where the axis is located also form an included angle of 45-60 degrees, so that the first stirring blade 31 is also obliquely arranged, the acting area of the first stirring blade 31 and the material is fully ensured, meanwhile, the resistance in the stirring process is reduced, and the energy consumption is reduced.

Referring to fig. 1, in general, a sodium alginate discharge pipe 12 is connected to a sodium alginate discharge port, and an electromagnetic valve is disposed on the sodium alginate discharge pipe 12, and the opening or closing of the sodium alginate discharge pipe 12 is directly controlled by the electromagnetic valve, so as to control the discharge of a product (including sodium alginate, water and alcohol) after a reaction in a tank 10. In certain preferred embodiments, the bottom of the can body 10 is further provided with four supporting frames which are uniformly arranged along the circumferential direction of the can body 10; the setting of support frame is supported jar body 10, and the product (including sodium alginate, water and alcohol) after the convenient reaction is discharged from the sodium alginate discharge gate on jar body 10. Preferably, the support frame includes a support column 41 connected to the bottom of the tank 10 and a support plate 42 provided at the bottom of the support column 41 for resting on the ground; the supporting column 41 is used for supporting the tank body 10, the supporting plate 42 also has a fixing function, and the supporting plate 42 can be fixed on the ground through bolts; typically, the support posts 41 are welded to the can body 10 so that the support posts are integral with the can body 10. The reaction product of alginic acid and sodium hydroxide, sodium alginate, is soluble in water, but insoluble in organic solvents such as ethanol, so that in the production process of sodium alginate, alcohol needs to reach a certain concentration in order to separate the reaction product of sodium alginate from the mixed system after reaction, therefore, an alcohol solution with a volume concentration of about 80-90% is added in the reaction process of alginic acid and sodium hydroxide, and the alcohol in the alcohol solution volatilizes. Preferably, an exhaust duct is arranged at the top of the tank body 10, and a fan 14 for exhausting the alcohol volatilized in the tank body 10 is arranged on the exhaust duct; the fan 14 timely extracts the volatile alcohol gas in the tank body 10 and sends the volatile alcohol gas into the alcohol recovery device for recycling, and meanwhile, the safety performance in the sodium alginate production process is also ensured.

Referring to fig. 1, in a normal condition, circulating water is introduced into the cooling jacket 11 outside the tank 10, a water inlet pipe 111 is arranged at the bottom of the cooling jacket 11, a water outlet pipe 112 is arranged at the top of the cooling jacket 11, the circulating water enters the cooling jacket 11 from the water inlet pipe 111, absorbs heat in the tank 10 in the cooling jacket 11, and finally flows out from the water outlet pipe 112; the cooling jacket 11 and the circulating water in the cooling jacket can timely dissipate the heat generated in the reaction process in the tank body 10, so that the heat dissipation is convenient. The neutralization reaction of alginic acid and sodium hydroxide is an exothermic reaction, so that the temperature can rise after long-time reaction, which is not favorable for the stability of the viscosity of the sodium alginate; the cooling jacket 11 and the circulating water therein realize the timely cooling of the interior of the tank body 10, and fully ensure the stability of the viscosity of the sodium alginate. As a preferred embodiment, the neutralization reaction equipment may further include a controller, and the tank 10 is provided with a pH on-line detector electrically connected to the controller; whether the reaction reaches the end point can be timely monitored by a pH on-line detector so as to ensure the complete reaction. In addition, preferably, an alginic acid metering tank 13 is connected above the alginic acid feeding port, and a first weight controller is arranged on the alginic acid metering tank 13; a sodium hydroxide metering tank 16 is connected above the sodium hydroxide feeding port, and a second weight controller is arranged on the sodium hydroxide metering tank 16; an alcohol solution metering tank 17 is connected above the alcohol solution feeding port, and a third weight controller is arranged on the alcohol solution metering tank 17; the first weight controller, the second weight controller and the third weight controller are all connected with the controller; the first weight controller can accurately measure the weight of alginic acid, and stops feeding when the preset weight is reached; calculating the required weight of the sodium hydroxide solution according to the moisture and the weight of the alginic acid on duty and the concentration of the sodium hydroxide solution, accurately measuring the weight of the sodium hydroxide solution by a second weight controller, and stopping feeding when the weight of the sodium hydroxide solution reaches a preset weight; the third weight controller accurately measures the weight of the alcohol solution, and stops feeding when the preset weight is reached. The utility model discloses an accurate measurement of alginic acid, sodium hydroxide solution and alcohol solution is added, has guaranteed the stability of batch pH value, and degree of automation is high, has effectively improved sodium alginate's production efficiency.

Therefore, compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an agitator that (mixing) shaft 60 that has two kinds of not equidirectional stirring vane in different positions constitutes, first stirring vane 20 has realized the stirring at jar body 10 middle part, stirring rake 30 coincide with jar body 10's bottom shape, the stirring of jar body 10 bottom has been realized to second stirring vane 31 on the stirring rake 30, the stirring, all materials in jar body 10 all are in the stirring in-process, avoid appearing the material dead angle, the going on of alginic acid solid and sodium hydroxide liquid reaction has been promoted, the reaction has been guaranteed fully, and simultaneously, be favorable to appearing of reaction product sodium alginate, the stirring effect is good, fully satisfied the reaction requirement of alginic acid solid and sodium hydroxide liquid that forms the insoluble product in the reaction process.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A neutralization reaction equipment for sodium alginate production is characterized by comprising:

the cooling device comprises a tank body, wherein the top of the tank body is respectively provided with an alginic acid feeding port, a sodium hydroxide feeding port and an alcohol solution feeding port, the bottom of the tank body is provided with a sodium alginate discharging port, and the outside of the tank body is sleeved with a cooling sleeve;

the agitator, the agitator includes motor, (mixing) shaft and sets up epaxial first stirring vane and stirring rake are stirred, the motor set up in the top of the jar body, the (mixing) shaft set up in stretch out in the inside of the jar body and upper end the jar body and with the motor is connected, first stirring vane sets up and is located along the horizontal direction the middle part of (mixing) shaft, the stirring rake is the arc setting and is located the bottom of (mixing) shaft, the stirring rake with the bottom of the jar body is identical mutually and is close to the bottom of the jar body, be equipped with a plurality of vertical second stirring vane that upwards extends on the stirring rake.

2. The neutralization reaction equipment for sodium alginate production as claimed in claim 1, wherein:

and the vertical plane where the second stirring blades are located and the vertical plane where the stirring paddles are located form an included angle of 45-60 degrees.

3. The neutralization reaction equipment for sodium alginate production as claimed in claim 1, wherein:

the second stirring blade is in any one or more of a spiral shape, an oval shape and a rectangular shape.

4. The neutralization reaction equipment for sodium alginate production as claimed in claim 1, wherein:

the first stirring blades are arranged at intervals and are arranged in a staggered mode.

5. The neutralization reaction equipment for sodium alginate production as claimed in claim 4, wherein:

the first stirring blade is in any one or more of a spiral shape, an oval shape and a rectangular shape.

6. The neutralization reaction apparatus for sodium alginate production as claimed in any one of claims 1-5, wherein:

the bottom of the tank body is also provided with four support frames which are uniformly arranged along the circumferential direction of the tank body.

7. The neutralization reaction equipment for sodium alginate production as claimed in claim 6, wherein:

the support frame includes with the support column that the bottom of jar body is connected with set up in the bottom of support column is used for placing the backup pad on ground.

8. The neutralization reaction equipment for sodium alginate production as claimed in claim 1, wherein:

the top of the tank body is provided with an exhaust pipeline, and the exhaust pipeline is provided with a fan for exhausting the volatile alcohol in the tank body.

9. The neutralization reaction equipment for sodium alginate production as claimed in claim 1, wherein:

the neutralization reaction equipment further comprises a controller, wherein a pH on-line detector is arranged on the tank body, and the pH on-line detector is electrically connected with the controller.

10. The neutralization reaction equipment for sodium alginate production as claimed in claim 9, wherein:

an alginic acid metering tank is connected above the alginic acid feeding port, and a first weight controller is arranged on the alginic acid metering tank;

a sodium hydroxide metering tank is connected above the sodium hydroxide feeding port, and a second weight controller is arranged on the sodium hydroxide metering tank;

an alcohol solution metering tank is connected above the alcohol solution feeding port, and a third weight controller is arranged on the alcohol solution metering tank;

the first weight controller, the second weight controller and the third weight controller are all connected with the controller.

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