Floating reaction system and method

Abstract

The invention discloses a floating reaction system and method, the system comprises a mixing barrel, the mixing barrel is provided with a phosphoric acid inlet and a crude syrup inlet; a foam making unit is arranged in the foam making barrel; the delayed reaction barrel is arranged between the mixing barrel and the foam making barrel and is used for prolonging the time that liquid in the mixing barrel flows into the foam making barrel; the flocculation barrel is communicated with the liquid outlet of the foam making barrel, and a flocculant liquid inlet is formed in the flocculation barrel; and the floating tank is communicated with the liquid outlet of the flocculation barrel. According to the system, phosphoric acid and crude syrup are fully mixed and then subjected to bubble making, flocculation and floating, the phosphoric acid and the crude syrup are fully reacted, the PH drop point of the syrup is reduced, auxiliary materials are saved, the sugar recovery rate is increased, the brix fluctuation of a floating pool is reduced, the floating time is prolonged, and scum removal is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of sugar production, and particularly relates to a flotation reaction system and method. Background Art

[0002] The flotation system in the sugar industry is a key step in sugar clarification. It is primarily used to remove non-sugar impurities such as pigments, colloids, and suspended particles from the sugar juice, thereby improving the purity and color of the sugar product. The core of the flotation system is to absorb impurities through bubbles to form scum, which is then separated from the clear liquid.

[0003] The existing flotation system adopts a three-stage reaction, which includes the acid-making tank, the stirring tank, the flocculation tank and then the flotation tank. However, the above system structure has the following problems: The consumption of auxiliary materials is large, the hammer degree of the flotation tank fluctuates greatly, the flotation time is short, and the slag is difficult to remove in time, which can easily cause scaling of the heating pipes and tanks of the crystallization tank in the smelting section, posing a great risk to product quality. Summary of the Invention

[0004] In order to solve the problems of large auxiliary material consumption, large fluctuation of the brix degree of the flotation tank, long flotation time and difficult cleaning of scum in the existing methods, the present invention provides a flotation reaction system and method.

[0005] The purpose of the present invention is achieved through the following technical solutions: A first aspect of the present invention provides a flotation reaction system, comprising: a mixing barrel, wherein the mixing barrel is provided with a phosphoric acid inlet and a crude syrup inlet; A bubble making barrel, wherein a bubble making unit is provided in the bubble making barrel; A delayed reaction barrel, which is arranged between the mixing barrel and the bubble making barrel and is used to prolong the time for the liquid in the mixing barrel to flow into the bubble making barrel; A flocculation barrel, the flocculation barrel is connected to the liquid outlet of the bubble making barrel and is provided with a flocculant liquid inlet; A floating pool is connected to the liquid outlet of the flocculation tank.

[0006] In a possible design, the delayed reaction barrel includes a primary reaction barrel and a secondary reaction barrel that are connected in sequence.

[0007] In a possible design, the primary reaction barrel and the secondary reaction barrel are vertical closed reaction barrels.

[0008] In a possible design, the specifications of the primary reaction barrel and the secondary reaction barrel are: φ1200×1500mm.

[0009] In a possible design, the delayed reaction barrel has a low-input and high-output structure.

[0010] In a possible design, the crude syrup inlet of the mixing barrel is connected to a raw material barrel for storing crude syrup, and the bottom of the raw material barrel is conical.

[0011] In a possible design, the bubble-making unit is an aerator.

[0012] A second aspect of the present invention provides a flotation reaction method, comprising the following steps: Mix the raw sugar syrup and phosphoric acid until they are fully mixed and then put them into the foam making barrel for foam making; After the foaming is completed, flocculants are added to the mixture of crude sugar syrup and phosphoric acid and then the mixture is floated in a flotation tank.

[0013] Compared with the prior art, the present invention has at least the following advantages and beneficial effects: In this system, phosphoric acid and crude sugar syrup are fully mixed before foaming, flocculation and flotation. Phosphoric acid and crude sugar syrup fully react, reducing the pH drop of the syrup, saving auxiliary materials, improving sugar recovery, reducing the fluctuation of the brix in the flotation tank, extending the flotation time and facilitating the removal of scum. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a structural schematic diagram of the flotation reaction system of the present invention. DETAILED DESCRIPTION

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0018] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0020] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0022] like Figure 1 As shown, the present invention provides a flotation reaction system, which includes a mixing barrel, a delayed reaction barrel, a bubble making barrel, a flocculation barrel, and a flotation tank, which are arranged in sequence. The mixing barrel is provided with a phosphoric acid inlet and a crude sugar syrup inlet; the bubble making barrel is provided with a bubble making unit; the delayed reaction barrel is used to extend the time it takes for the liquid in the mixing barrel to flow into the bubble making barrel; the flocculation barrel is connected to the liquid outlet of the bubble making barrel and is provided with a flocculant inlet; and the flotation tank is connected to the liquid outlet of the flocculation barrel.

[0023] By adopting the above structure, the raw sugar syrup and phosphoric acid are first mixed, and the reaction time of the raw sugar syrup and phosphoric acid is increased in the delayed reaction barrel to ensure that they are fully reacted and then foaming, flocculation and flotation are carried out in sequence. This can reduce the pH drop point of the syrup, save auxiliary materials, improve sugar recovery, reduce the fluctuation of the brix of the flotation tank, extend the flotation time, facilitate scum removal, improve sugar recovery, and improve product quality.

[0024] The delayed reaction tank is used to extend the reaction time between the raw syrup and phosphoric acid. This can be achieved in a variety of ways, such as by extending the length of the connecting pipe between the mixing tank and the foaming tank, or by using a barrel structure. Preferably, a barrel structure is used. In this case, the delayed reaction tank preferably comprises a primary and secondary reaction tanks connected in sequence.

[0025] In order to improve the quality of sugar production, the primary reaction barrel and the secondary reaction barrel are preferably vertical closed reaction barrels.

[0026] Furthermore, to ensure a thorough reaction between the raw sugar syrup and phosphoric acid, the delayed reaction tank features a low-inlet, high-outlet structure, with the inlet located at the bottom and the outlet at the top. Similarly, the mixing tank also employs a low-inlet, high-outlet structure.

[0027] Existing systems directly add raw sugar syrup to a mixing barrel, which produces excessive foam and affects the reaction. To address this issue, the present solution further connects the raw sugar syrup inlet of the mixing barrel to a raw material barrel for storing raw sugar syrup. The raw material barrel has a conical bottom and a liquid outlet located at the conical bottom.

[0028] The raw material barrel is used to buffer the crude sugar syrup, which can avoid the problem of excessive foam in the mixing barrel. The raw material barrel adopts a tapered bottom structure, which can further reduce the amount of colloid, reduce dead angles, and improve the uniformity of discharge.

[0029] A second aspect of the present invention provides a flotation reaction method, comprising the following steps: Mix the raw sugar syrup and phosphoric acid until they are fully mixed and then put them into the foam making barrel for foam making; After the foaming is completed, flocculants are added to the mixture of crude sugar syrup and phosphoric acid and then the mixture is floated in a flotation tank.

[0030] When the raw sugar syrup and phosphoric acid are mixed, the volume of the added phosphoric acid is 12% of the volume of the raw sugar syrup.

[0031] To facilitate understanding of the technical advantages of this solution, let's take an example: the delayed reaction tank utilizes a primary and secondary reaction tank structure. Both the primary and secondary reaction tanks are vertical, sealed tanks with dimensions of φ1200×1500 mm. These are integrated into the existing flotation reaction system, with the mixing tank measuring φ3000×3500 mm; the bubble-making tank measuring φ2000×3000 mm; the flocculation tank measuring φ1500×2000 mm; and the flotation tank measuring φ5000×2500 mm. This system can process 6,300-6,500 tons of sugarcane daily, increasing production capacity by 1,300-1,500 tons, while maintaining stable product quality and achieving the desired results.

[0032] The above system and method effectively increase the phosphoric acid reaction time, reduce the pH drop of syrup, save auxiliary materials, improve sugar recovery, and enhance product quality. The main indicators are compared as follows: Comparison of physical and chemical indicators of white sugar (840 batches) From the above data analysis and comparison: 1. Through analysis and comparison, the quality of white sugar products has been steadily improved after improvement. The proportion of high-quality sugar has increased by 22.29%, the proportion of color value less than 90IU has increased by 1.41%, and the conductivity ash content has decreased by 0.006.

[0033] 2. Through analysis and comparison, the consumption of bulk auxiliary materials decreased during the same period before improvement.

[0034] 3. Through calculation, the production capacity is increased by 1300-1500 tons.

[0035] 4. Based on the comparison of the consumption of major auxiliary materials in the above table, the consumption of lime was saved by 1,300 tons, food-grade sulfur was saved by 370 tons, and phosphoric acid was saved by 229.50 tons.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A floating reaction system, characterized in that: include: a mixing barrel, wherein the mixing barrel is provided with a phosphoric acid inlet and a crude syrup inlet; A bubble making barrel, wherein a bubble making unit is provided in the bubble making barrel; A delayed reaction barrel, which is arranged between the mixing barrel and the bubble making barrel and is used to prolong the time for the liquid in the mixing barrel to flow into the bubble making barrel; A flocculation barrel, the flocculation barrel is connected to the liquid outlet of the bubble making barrel and is provided with a flocculant liquid inlet; A floating pool is connected to the liquid outlet of the flocculation tank.

2. A flotation reaction system according to claim 1, characterized in that: The delayed reaction barrel includes a primary reaction barrel and a secondary reaction barrel which are connected in sequence.

3. A flotation reaction system according to claim 2, characterized in that: The primary reaction barrel and the secondary reaction barrel are vertical closed reaction barrels.

4. A flotation reaction system according to claim 2, characterized in that: The specifications of the primary reaction barrel and the secondary reaction barrel are: φ1200×1500mm.

5. A flotation reaction system according to claim 1, characterized in that: The delayed reaction barrel has a low-inlet and high-outlet structure.

6. A flotation reaction system according to claim 1, characterized in that: The crude syrup liquid inlet of the mixing barrel is connected to a raw material barrel for storing crude syrup. The bottom of the raw material barrel is conical and the liquid outlet is arranged at the conical bottom.

7. A flotation reaction system according to claim 1, characterized in that: The bubble making unit is an aerator.

8. A flotation reaction method, characterized in that: The following steps are involved: Mix the raw sugar syrup and phosphoric acid until they are fully mixed and then put them into the foam making barrel for foam making; After the foaming is completed, flocculants are added to the mixture of crude sugar syrup and phosphoric acid and then the mixture is floated in a flotation tank.

9. A flotation reaction method according to claim 8, characterized in that: When the raw sugar syrup and phosphoric acid are mixed, the volume of phosphoric acid added is 12% of the volume of the raw sugar syrup.

Images