Cleaning method for preparing sugar from beet

Abstract

The invention discloses a cleaning method for beet sugar manufacturing, and relates to the technical field of beet sugar manufacturing industry. The method sequentially comprises a pre-liming process, a main liming process, a primary carbonation process and a secondary carbonation process, and a sedimentation process is added on the basis; more specifically, the sedimentation process can be arranged between the pre-liming process and the main liming process, and can also be arranged between the main liming process and a carbonation tank process. According to the invention, a settling separation process is arranged between the preliming process and the main liming process or between the main liming process and the carbonation tank process, so that non-sugar sediments generated in the preliming process or the main liming process are removed in advance, and the sediments are prevented from entering subsequent processes along with sugar juice; and the condition that impurities are re-dispersed in the syrup is reduced, so that the quality of the raw material syrup is improved.

Description

Technical Field

[0001] This invention relates to the field of beet sugar production technology, and in particular to a cleaning method for beet sugar production. Background Technology

[0002] Beet sugar production involves a series of processes including leaching, purification, concentration, crystallization, and separation. Among these, the purification process of the leaching juice is crucial, directly determining the final quality of the granulated sugar. The main purpose of the purification process is to remove non-sucrose impurities such as pigments, pigment precursors, starch, pectin, proteins, amino acids, colloids, and inorganic salts from the leaching juice, providing high-quality raw syrup for the subsequent sugar boiling process.

[0003] For a long time, my country's sugar beet industry has used the carbonation process as a purification technique, and this process has remained essentially unchanged. As shown in Figure 1, the carbonation purification process mainly utilizes the reaction of lime milk with carbon dioxide to generate calcium carbonate precipitate, which removes impurities from the sugar juice through adsorption and co-precipitation. Key steps include pre-ashing, main ashing, first-carbon saturation, and second-carbon saturation. In the pre-ashing stage, lime milk is added to neutralize the acidity of the sugar juice, causing some colloids to coagulate; the main ashing stage further adjusts the chemical environment of the sugar juice; during first-carbon saturation, carbon dioxide is introduced to generate calcium carbonate precipitate to adsorb impurities; and second-carbon saturation further reduces the alkalinity of the sugar juice, removing residual calcium salts.

[0004] However, with the sugar industry's ever-increasing demands for product quality, the limitations of the carbonation purification process have become increasingly apparent. For example, in practice, although the pre-ashing process is considered a core element, requiring guaranteed sedimentation efficiency and sufficient reaction, the results are often unsatisfactory. Experiments have shown that adding flocculants to the pre-ash juice produces a certain amount of sediment; however, this sediment is not effectively separated and removed, instead entering the subsequent main ashing stage along with the sugar juice, undergoing a carbon saturation process until saturation is complete before sediment separation. This process arrangement has serious drawbacks. A large amount of stable agglomerated precipitate is repeatedly re-dissolved in subsequent processes, causing impurities to redisperse in the sugar juice. This not only interferes with key indicators such as ash addition and saturation parameters, affecting the stability of the entire sugar-making process and the consistency of product quality, but also significantly increases the difficulty of subsequent treatment. Furthermore, because more lime milk and carbon dioxide are required to reform precipitates for removal, production costs and energy consumption increase, and purification efficiency is significantly reduced.

[0005] The drawbacks of the carbonate purification process are more pronounced when using beet raw materials of relatively poor quality or with significant quality fluctuations. These raw materials contain more hydrophilic colloids produced by microbial degradation of sucrose, such as pectin, hemicellulose, dextran, and levulin. These colloids possess unique physicochemical properties that significantly influence the size and particle size distribution of calcium carbonate crystals during the saturation process. Hydrophilic colloids may adsorb onto the surface of calcium carbonate crystals, hindering normal crystal growth and aggregation, resulting in fine, dispersed calcium carbonate precipitates that are difficult to settle and filter. This, in turn, reduces the filtration performance and impurity removal efficiency of the sugar juice, leaving more impurities and affecting the quality of the final granulated sugar. Furthermore, it can trigger a series of serious production problems. For example, a significant increase in limestone usage leads to higher production costs; thickening filters and plate and frame filters operate under overload conditions, causing sediment to clog the filter media, slowing down the filtration speed, shortening equipment lifespan, and increasing equipment maintenance costs; a substantial increase in the calcium salt content of the secondary clarifier affects the purity and quality of the sugar juice, and excessive calcium salts may form scale during subsequent concentration and crystallization processes, affecting the normal operation of equipment and product quality; increased honey production results in raw material waste and decreased production efficiency; and the quality of the finished sugar declines, making it difficult to meet market demand and affecting the company's market competitiveness.

[0006] Currently, although the industry is exploring some improvement measures, most of them are local optimizations based on the existing carbonate process, failing to fundamentally solve core problems such as precipitate re-dissolution and low cleaning efficiency. For example, some companies have tried adjusting parameters such as the amount of ash added, temperature, and time in pre-ash and main ash processes, but the effects are limited, and the differences between different batches of raw materials make the adjustment of process parameters lack stability and universality.

[0007] In summary, existing beet sugar refining processes have many shortcomings and fail to meet the modern sugar industry's requirements for product quality and production efficiency. Therefore, developing a beet sugar refining method that can remove non-sugar sediments generated during pre-ashing is of significant practical importance. Summary of the Invention

[0008] This invention provides a cleaning method for sugar beet production. This cleaning method removes the non-sugar sediment generated during pre-ashing in advance, thereby avoiding the adverse effects of the non-sugar sediment on subsequent processes and improving the quality of the raw syrup.

[0009] To solve the above problems, the technical solution adopted by the present invention is as follows: It includes, in sequence, a pre-ashing process, a main ashing process, a primary carbon saturation process, a secondary carbon saturation process, and a sedimentation and separation process.

[0010] Regarding the sedimentation separation process, Option 1: The sedimentation and separation process is located between the pre-ashing process and the main ashing process, and includes the following specific steps: A. The beet juice from the leaching process is pre-limed to obtain pre-limed juice; B. The pre-ash juice obtained from the pre-ash treatment is first aerated, and then subjected to sedimentation treatment to obtain settled clear juice; C. The clear liquid obtained from the sedimentation treatment is subjected to primary ash treatment to obtain primary ash liquid; D. The main ash juice obtained from the main ash treatment is subjected to a carbon saturation treatment to obtain a carbon juice, which is then filtered to obtain a carbon clear juice. E. The 1-carbon clear juice is subjected to 2-carbon saturation treatment to obtain 2-carbon juice, which is then filtered to obtain 2-carbon clear juice.

[0011] The above technical solution can be further categorized into: A cleaning device is used for cleaning, which includes a pre-ash box, a gas dispersion box, a sedimentation tank, a main ash box, a carbon saturation tank, a first filter, a second carbon saturation tank, and a second filter, all connected in sequence. The gas dispersion box has a liquid inlet, a liquid outlet, and a gas outlet; the sedimentation tank has a liquid inlet and a liquid outlet, and the liquid outlet of the gas dispersion box is connected to the liquid inlet of the sedimentation tank; the pre-ash box has a liquid outlet, which is connected to the liquid inlet of the gas dispersion box; the main ash box has a liquid inlet, which is connected to the liquid outlet of the sedimentation tank. The specific method for cleaning using the aforementioned cleaning device includes the following steps: A. The beet juice from the leaching process enters the pre-ash box for pre-ash treatment to obtain pre-ash juice; B. The pre-ash liquid from the pre-ash box is first aerated in the aeration box, and then enters the sedimentation tank for settling treatment to obtain settled clear liquid; C. The clear liquid obtained from the settling treatment enters the main ash box for main ash treatment to obtain the main ash liquid; D. The main ash liquid from the main ash box enters the first carbon saturation tank for first carbon saturation treatment to obtain first carbon liquid, which is then filtered through a filter to obtain first carbon clear liquid. E. The first-carbon clear juice enters the second-carbon saturation tank for second-carbon saturation treatment to obtain second-carbon juice, which is then filtered through a second filter to obtain second-carbon clear juice.

[0012] Regarding the sedimentation separation process, Option Two: The sedimentation and separation process is located between the main ash process and the carbon saturation process, and includes the following specific steps: A. The beet juice from the leaching process is pre-limed to obtain pre-limed juice; B. The pre-ash liquid obtained from the pre-ash treatment is subjected to main ash treatment to obtain the main ash liquid; C. The main ash juice obtained from the main ash treatment is first aerated, and then subjected to sedimentation treatment to obtain sedimented clear juice; D. The clarified juice obtained from sedimentation is subjected to 1-carbon saturation treatment to obtain 1-carbon juice, which is then filtered to obtain 1-carbon clarified juice; E. The 1-carbon clear juice is subjected to 2-carbon saturation treatment to obtain 2-carbon juice, which is then filtered to obtain 2-carbon clear juice.

[0013] The above technical solution can be further categorized into: A cleaning device is used for cleaning, which includes a pre-ash box, a main ash box, a gas dispersing box, a sedimentation tank, a primary carbon saturation tank, a first carbon saturation tank, a second carbon saturation tank, and a second filter, all connected in sequence. The gas dispersing box has a liquid inlet, a liquid outlet, and a gas outlet; the sedimentation tank has a liquid inlet and a liquid outlet, and the liquid outlet of the gas dispersing box is connected to the liquid inlet of the sedimentation tank; the main ash box has a liquid outlet, which is connected to the liquid inlet of the gas dispersing box; and the primary carbon saturation tank has a liquid inlet, which is connected to the liquid outlet of the sedimentation tank. The specific method for cleaning using the aforementioned cleaning device includes the following steps: A. The beet juice from the leaching process enters the pre-ash box for pre-ash treatment to obtain pre-ash juice; B. The pre-ash liquid from the pre-ash box enters the main ash box for main ash processing to obtain the main ash liquid; C. The main ash juice obtained from the main ash treatment is first aerated in the aeration box, and then enters the sedimentation tank for sedimentation treatment to obtain the sedimented clear juice; D. The sedimentation slurry obtained from the sedimentation treatment is fed into a carbon saturation tank for carbon saturation treatment to obtain carbon slurry, which is then filtered through a filter to obtain carbon slurry. E. The first-carbon clear juice enters the second-carbon saturation tank for second-carbon saturation treatment to obtain second-carbon juice, which is then filtered through a second filter to obtain second-carbon clear juice.

[0014] In the two technical solutions mentioned above, regarding the structure of the gas diffuser box, preferably, the middle section of the gas diffuser box is a cylindrical structure, and the top and bottom ends are both frustoconical structures. The gas diffuser port is installed at the top of the gas diffuser box, the liquid inlet of the gas diffuser box is installed at the upper end of the middle section of the gas diffuser box, and the liquid outlet of the gas diffuser box is installed at the bottom of the gas diffuser box. Regarding the structure of the sedimentation tank, preferably, the sedimentation tank is divided into three sections: upper, middle, and lower. The upper section is cylindrical, the middle section is frustum-shaped, the upper end of the lower section is cylindrical, and the lower end is frustum-shaped. The large end of the frustum-shaped structure in the middle section is connected to the upper section, and the small end is connected to the lower section.

[0015] Preferably, flocculants can be added during the sedimentation and separation process.

[0016] Regarding the addition of flocculant and its mixing method with pre-ash / main ash, Option 1: A mixer is provided between the aeration box and the sedimentation tank. The mixer has a mixer inlet, a mixer outlet, and a flocculant inlet. An agitator is provided inside the mixer. The mixer inlet is connected to the aeration box outlet, and the mixer outlet is connected to the sedimentation tank inlet. Furthermore, in the upper section inside the sedimentation tank, there is a distribution ring pipe connected to the liquid inlet of the sedimentation tank and a juice outlet ring pipe connected to the liquid outlet of the sedimentation tank. The distribution ring pipe has several openings. A central guide channel is provided below the perimeter of the openings, and a distribution baffle is provided below the bottom of the central guide channel.

[0017] Option 2: The sedimentation tank is equipped with a flocculant inlet at the top and a stirrer inside the sedimentation tank.

[0018] By adopting the above technical solution, the present invention has the following advantages compared with the prior art: 1. This invention can improve the quality of raw syrup: by setting a sedimentation separation process between the pre-ashing process and the main ashing process or between the main ashing process and the carbon saturation tank process, the non-sugar sediments generated in the pre-ashing process or the main ashing process are removed in advance, avoiding these sediments from entering the subsequent processes with the syrup, reducing the situation where impurities are redispersed in the syrup, thereby improving the quality of raw syrup.

[0019] 2. This invention can ensure the stability of the sugar-making process: by removing non-sugar sediments in advance, it prevents them from interfering with key indicators such as ash addition and saturation parameters, thus ensuring the stability of the entire sugar-making process and the consistency of product quality.

[0020] 3. This invention can reduce the difficulty of subsequent processing: It reduces the problem of impurities redispersing due to multiple redissolutions of precipitates in subsequent processes, thus reducing the difficulty of subsequent processing.

[0021] 4. This invention can save production costs and energy: it avoids the need to consume more lime milk and carbon dioxide to remove impurities by reforming the precipitate, thus reducing production costs and energy consumption.

[0022] 5. This invention can improve cleaning efficiency: It effectively solves the core problems of precipitate re-dissolution and low cleaning efficiency in the existing carbonic acid cleaning process, thereby improving the cleaning efficiency.

[0023] 6. This invention can adapt to raw materials of different qualities: For beet raw materials with relatively poor quality or large quality fluctuations, this device can reduce the obstruction of hydrophilic colloids in the raw materials to the growth and aggregation of calcium carbonate crystals during the saturation process, reduce the negative impact on the filtration performance and impurity removal efficiency of the sugar juice, and avoid causing a series of serious production problems, such as increased limestone usage, overloaded operation of filtration equipment, affected purity and quality of sugar juice, increased honey production, and decreased quality of finished sugar.

[0024] 7. This invention optimizes the sedimentation tank structure to facilitate sedimentation and separation: the sedimentation tank is designed in sections, with an upper cylindrical section, a middle frustum-shaped section, and a lower cylindrical section with a lower frustum-shaped section. The large end of the middle section connects to the upper section, and the small end connects to the lower section. This structure is conducive to the sedimentation and separation of sediments. The upper section of the sedimentation tank is equipped with a distribution ring pipe, a central guide channel, and a distribution baffle, which can make the liquid entering the sedimentation tank evenly distributed, further improving the sedimentation and separation effect.

[0025] 8. This invention can enhance the flocculation effect: Option 1, a mixer is set between the gas dispersion box and the sedimentation tank. The mixer is equipped with a flocculant inlet and an agitator, so that the flocculant is added and fully mixed before the pre-ash juice or main ash juice enters the sedimentation tank, thereby enhancing the flocculation effect; Option 2, a flocculant inlet is directly set at the top of the sedimentation tank, along with an agitator, so that the pre-ash juice or main ash juice is fully mixed with the added flocculant in the sedimentation tank by the agitator, and the flocculation effect is adjusted according to the actual situation to improve the separation efficiency of the precipitate. Attached Figure Description

[0026] Figure 1 This is a flow chart of the existing carbonic acid purification process.

[0027] Figure 2 This is a schematic diagram of the structure of the present invention, in which the gas dispersion box and the sedimentation tank are installed between the pre-ash box and the main ash box, and a mixer is set between the gas dispersion box and the sedimentation tank.

[0028] Figure 3 This is a schematic diagram of the structure of the present invention, in which the gas dispersion box and the sedimentation tank are installed between the pre-ash box and the main ash box, and a flocculant inlet is provided at the top of the sedimentation tank and a stirrer is provided inside the sedimentation tank.

[0029] Figure 4 This is a schematic diagram of the structure of the present invention, in which the gas dispersion box and the sedimentation tank are installed between the main ash box and a carbon saturation tank, and a mixer is set between the gas dispersion box and the sedimentation tank.

[0030] Figure 5 This is a schematic diagram of the structure of the present invention, in which the gas dispersing box and the sedimentation tank are installed between the main ash box and a carbon saturation tank, and a flocculant inlet is provided at the top of the sedimentation tank and a stirrer is provided inside the sedimentation tank.

[0031] Figure 6 This is a schematic diagram of the sedimentation tank structure in a preferred embodiment of the present invention.

[0032] Figure 7 In order to adopt the present invention according to Figure 2 and 3 The purification process flow chart.

[0033] Figure 8 In order to adopt the present invention according to Figure 4 and 5 The purification process flow chart.

[0034] Figures 2-6 In the diagram, the following labels represent different parts of the ash tank: 1 – Pre-ash box, 1-1 – Pre-ash box outlet, 2 – Main ash box, 2-1 – Main ash box inlet, 2-2 – Main ash box outlet, 3 – Carbon saturation tank, 3-1 – Carbon saturation tank inlet, 4 – Aeration box, 4-1 – Aeration box inlet, 4-2 – Aeration box outlet, 4-3 – Aeration port, 5 – Sedimentation tank, 5-1 – Sedimentation tank inlet, 5-2 – Sedimentation tank outlet. 5-3 – Distribution ring pipe; 5-4 – Juice outlet ring pipe; 5-5 – Central guide channel; 5-6 – Distribution baffle; 5-7 – Flocculant inlet; 5-8 – Stirrer; 6 – Mixer; 6-1 – Mixer inlet; 6-2 – Mixer outlet; 6-3 – Flocculant inlet; 6-4 – Stirrer; 7 – Filter 1; 8 – Carbon dioxide saturation tank; 9 – Filter 2; 10 – Suction filter. Detailed Implementation

[0035] The invention will now be described in further detail with reference to the accompanying drawings: Regarding the cleaning device used in this invention: Option 1: like Figure 2 and Figure 3 The purification device for sugar beet production shown includes a pre-ash box 1, a gas dispersing box 4, a sedimentation tank 5, a main ash box 2, a primary carbon saturation tank 3, a primary filter 7, a secondary carbon saturation tank 8, and a secondary filter 9, which are connected in sequence. The gas dispersing box 4 is provided with a gas dispersing box inlet 4-1, a gas dispersing box outlet 4-2, and a gas dispersing port 4-3. The sedimentation tank 5 is provided with a sedimentation tank inlet 5-1 and a sedimentation tank outlet 5-2. The pre-ash box 1 is provided with a pre-ash box outlet 1-1, which is connected to the gas dispersing box inlet 4-1. The main ash box 2 is provided with a main ash box inlet 2-1, which is connected to the sedimentation tank outlet 5-2. In this technical solution, by setting up an aeration box 4 and a sedimentation tank 5 between the pre-ash box 1 and the main ash box 2, the pre-ash juice is first aerated in the aeration box 4 and then enters the sedimentation tank 5 for settling. This removes the non-sugar sediment generated during the pre-ash treatment in advance, preventing these sediments from entering the subsequent processes with the sugar juice and reducing the redispersibility of impurities in the sugar juice, thereby improving the quality of the raw syrup.

[0036] Option 2: like Figure 4 and Figure 5 The purification device for sugar beet production shown includes a pre-ash box 1, a main ash box 2, a gas dissipation box 4, a sedimentation tank 5, a primary carbon saturation tank 3, a first filter 7, a second carbon saturation tank 8, and a second filter 9, which are connected in sequence. The gas dissipation box 4 has a gas dissipation box inlet 4-1, a gas dissipation box outlet 4-2, and a gas outlet 4-3. The sedimentation tank 5 has a sedimentation tank inlet 5-1 and a sedimentation tank outlet 5-2, with the gas dissipation box outlet 4-2 connected to the sedimentation tank inlet 5-1. The main ash box 2 has a main ash box outlet 2-2, which is connected to the gas dissipation box inlet 4-1. The primary carbon saturation tank 3 has a primary carbon saturation tank inlet 3-1, which is connected to the sedimentation tank outlet 5-2. In this technical solution, an aeration box 4 and a sedimentation tank 5 are set between the main ash box 2 and the carbon saturation tank 3. The pre-ash juice is first aerated in the aeration box 4 and then enters the sedimentation tank 5 for settling. The non-sugar sediment generated by the pre-ash treatment is removed in advance, avoiding these sediments from entering the subsequent process with the sugar juice. This reduces the situation where impurities are redispersed in the sugar juice, thereby improving the quality of the raw syrup.

[0037] In the two purification device schemes for beet sugar production described above, regarding the structure of the aeration box 4, preferably, the middle section of the aeration box 4 is cylindrical, and the top and bottom ends are both frustoconical. The aeration port 4-3 is installed at the top of the aeration box 4, the liquid inlet 4-1 is installed at the upper end of the middle section of the aeration box, and the liquid outlet 4-2 is installed at the bottom of the aeration box 4. The frustoconical structure at the top and bottom of the aeration box 4 facilitates the upward discharge of gas from the pre-lime solution and the downward discharge of remaining liquid into the next process.

[0038] Regarding the structure of sedimentation tank 5, preferably, sedimentation tank 5 is divided into three sections: upper, middle, and lower. The upper section has a cylindrical structure, the middle section has a frustum-shaped structure, and the upper end of the lower section has a cylindrical structure, while the lower end has a frustum-shaped structure. The larger end of the frustum-shaped structure in the middle section connects to the upper section, and the smaller end connects to the lower section. This structural design is more conducive to the sedimentation and separation of sediments within sedimentation tank 5, improving its sedimentation and separation efficiency and effect.

[0039] Preferably, to improve the sedimentation and separation effect, a flocculant can be added during the sedimentation of the pre-lime or main lime. Regarding the addition of the flocculant and its mixing method with the pre-lime or main lime, in one embodiment, it can be as follows: Figure 2 and Figure 4As shown, a mixer 6 is installed between the aeration box 4 and the sedimentation tank 5. The mixer 6 has a mixer inlet 6-1, a mixer outlet 6-2, and a flocculant inlet 6-3. An agitator 6-4 is installed inside the mixer 6. The mixer inlet 6-1 is connected to the aeration box outlet 4-2, and the mixer outlet 6-2 is connected to the sedimentation tank inlet 5-1. This design ensures that the pre-ash or main ash from the aeration box 4 and the added flocculant are thoroughly mixed in the mixer 6. The agitator 6-4 enhances the mixing effect, allowing the flocculant to fully contact the impurities in the pre-ash or main ash, forming larger flocs, which is beneficial for subsequent sedimentation and separation in the sedimentation tank 5, thus improving sedimentation efficiency. In this scheme, the structural diagram of the sedimentation tank 5 can be shown as follows. Figure 6 As shown, in the upper section inside the sedimentation tank 5, there is a distribution ring pipe 5-3 connected to the sedimentation tank inlet 5-1 and a juice outlet ring pipe 5-4 connected to the sedimentation tank outlet 5-2. The distribution ring pipe 5-3 has several openings, and a central guide channel 5-5 is provided below the perimeter of the openings. This channel can further guide the flow direction of the pre-ash juice or main ash juice, so that the pre-ash juice or main ash juice flows downward along a predetermined path, avoiding disorderly diffusion of the pre-ash juice or main ash juice in the sedimentation tank 5. This helps to form a stable water flow state and improve the treatment effect of the sedimentation tank 5. A distribution baffle 5-6 is provided below the bottom of the central guide channel 5-5, which can further adjust the flow rate and direction of the pre-ash juice or main ash juice, so that the pre-ash juice or main ash juice forms a more favorable hydraulic condition for sedimentation in the sedimentation tank 5, such as slowing down the water flow rate, prolonging the sedimentation time, and promoting better sedimentation of impurities. Overall, the above structural design can evenly distribute the pre-ash juice or main ash juice entering the sedimentation tank 5 to various areas of the sedimentation tank 5, avoiding the pre-ash juice or main ash juice from flowing into a certain part in a concentrated manner, making the distribution of pre-ash juice or main ash juice in the sedimentation tank 5 more uniform, which is conducive to improving sedimentation efficiency and ensuring the consistency of sedimentation effect.

[0040] Preferably, regarding the addition of the flocculant and its mixing method with the pre-lime or main lime, in another embodiment, it can be as follows: Figure 3 and Figure 5 As shown, a flocculant inlet 5-7 is provided at the top of the sedimentation tank 5, and a stirrer 5-8 is installed inside the sedimentation tank 5. Although this structural design is relatively simple, the stirrer 5-8 inside the sedimentation tank 5 can still mix the added flocculant with the pre-ash or main ash to a certain extent, promoting floc formation and meeting basic sedimentation treatment requirements. For some applications where the sedimentation effect requirements are not particularly high, or where the treatment scale is small, this technical solution can be considered an economical and practical option.

[0041] Example 1 like Figure 6 The sugar-making process for beets shown uses a purification method, employing the above-mentioned... Figure 2 and 6The specific method for cleaning the purification device shown includes the following steps: A. The beet juice from the leaching process enters the pre-ash box 1 and is pre-ashed with added lime milk to obtain pre-ash juice; B. The pre-ash liquid from the pre-ash box outlet 1-1 first enters the aeration box 4 through the aeration box inlet 4-1 and is aerated through the aeration port 4-3. Then it flows out from the aeration box outlet 4-2 and enters the mixer 6 through the mixer inlet 6-1. It comes into contact with the flocculant added from the flocculant inlet 6-3 and is mixed evenly by the agitator 6-4. After being evenly mixed, it flows out from the mixer outlet 6-2 and enters the sedimentation tank 5 through the sedimentation tank inlet 5-1. It flows to the central guide channel 5-5 through the opening of the distribution ring pipe 5-3 and undergoes orderly sedimentation under the action of the distribution baffle 5-6 to obtain clear liquid. C. The clear juice from the sedimentation tank outlet 5-2 flows out of the sedimentation tank outlet 5-2 through the juice outlet ring pipe 5-4; at the same time, the mud juice from the sedimentation tank 5 is separated from the mud and clear juice by the suction filter 10. The mud leaves the factory, while the clear juice is mixed with the clear juice from the sedimentation tank outlet 5-2 and enters the main ash box 2 through the main ash box inlet 2-1. It is then treated with added lime milk to obtain the main ash juice. D. The main ash juice coming out from the main ash box outlet 2-2 enters the carbon saturation tank 3 through the carbon saturation tank inlet 3-1 for carbon saturation treatment to obtain carbon juice. After being filtered by filter 7, carbon clear juice is obtained. E. The first-carbon clear juice enters the second-carbon saturation tank 8 for second-carbon saturation treatment to obtain second-carbon juice, which is then filtered through filter 9 to obtain second-carbon clear juice.

[0042] Example 2 like Figure 8 The sugar-making process shown uses a purification method, employing methods such as... Figure 5 The specific method for purification shown includes the following steps: A. The beet juice from the leaching process enters the pre-ash box 1 and is pre-ashed with added lime milk to obtain pre-ash juice; B. The pre-ash liquid coming out of the pre-ash box outlet 1-1 enters the main ash box 2 through the main ash box inlet 2-1, and is treated with added lime slurry to obtain the main ash liquid; C. The main ash liquid flowing out from the main ash box outlet 2-2 first enters the aeration box 4 through the aeration box inlet 4-1, and is aerated through the aeration port 4-3. Then it flows out from the aeration box outlet 4-2, enters the sedimentation tank 5 through the sedimentation tank inlet 5-1, comes into contact with the flocculant added from the flocculant inlet 5-7, and is mixed evenly by the agitator 5-8. Then it undergoes sedimentation treatment to obtain clear ash. D. The mud juice from the sedimentation tank 5 is separated into mud and clear juice by the suction filter 10. The mud leaves the factory, while the clear juice is mixed with the clear juice from the sedimentation tank outlet 5-2 and enters the carbon saturation tank 3 through the carbon saturation tank inlet 3-1 for carbon saturation treatment to obtain carbon juice. After being filtered by filter 7, carbon clear juice is obtained. E. The first-carbon clear juice enters the second-carbon saturation tank 8 for second-carbon saturation treatment to obtain second-carbon juice, which is then filtered through filter 9 to obtain second-carbon clear juice.

[0043] Comparative example like Figure 8 The purification method shown for beet sugar production includes the following steps: A. The beet juice from the leaching process enters the pre-ash box 1 and is pre-ashed with added lime milk to obtain pre-ash juice; B. The pre-ash liquid coming out of the pre-ash box outlet 1-1 enters the main ash box 2 through the main ash box inlet 2-1, and is treated with added lime slurry to obtain the main ash liquid; D. The main ash juice coming out from the main ash box outlet 2-2 enters the carbon saturation tank 3 through the carbon saturation tank inlet 3-1 for carbon saturation treatment to obtain carbon juice. After being filtered by filter 7, carbon clear juice is obtained. E. The first-carbon clear juice enters the second-carbon saturation tank 8 for second-carbon saturation treatment to obtain second-carbon juice, which is then filtered through filter 9 to obtain second-carbon clear juice.

[0044] To better demonstrate the effects of the present invention, the carbon-1 and carbon-2 clear juices obtained in Examples 1, 2 and the comparative example were tested, and the test results are shown in Table 1 below.

[0045] Table 1 .

[0046] Note: In the test items in Table 1 above, "dilute juice" usually refers to "one-carbon juice" mentioned in this invention, and "two-carbon clear juice" usually refers to "two-carbon clear juice" mentioned in this invention.

[0047] As can be seen from the test results in Table 1 above, the dicarbonate juice prepared in Examples 1 and 2 of the present invention has higher quality than that prepared in Comparative Example 1.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A purification method for sugar production from sugar beets, comprising, in sequence, a pre-ashing step, a main ashing step, a first carbon saturation step, and a second carbon saturation step, characterized in that: It also includes the sedimentation and separation process.

2. The purification method for sugar production from sugar beets according to claim 1, characterized in that: The sedimentation and separation process is located between the pre-ashing process and the main ashing process.

3. The purification method for sugar production from beets according to claim 2, characterized in that... The specific steps include the following: A. The beet juice from the leaching process is pre-limed to obtain pre-limed juice; B. The pre-ash juice obtained from the pre-ash treatment is first aerated, and then subjected to sedimentation treatment to obtain settled clear juice; C. The clear liquid obtained from the sedimentation treatment is subjected to primary ash treatment to obtain primary ash liquid; D. The main ash juice obtained from the main ash treatment is subjected to a carbon saturation treatment to obtain a carbon juice, which is then filtered to obtain a carbon clear juice. E. The 1-carbon clear juice is subjected to 2-carbon saturation treatment to obtain 2-carbon juice, which is then filtered to obtain 2-carbon clear juice.

4. The purification method for sugar production from sugar beets according to claim 3, characterized in that: A cleaning device is used for cleaning, which includes a pre-ash box, a gas dispersion box, a sedimentation tank, a main ash box, a carbon saturation tank, a first filter, a second carbon saturation tank, and a second filter, all connected in sequence. The gas dispersion box has a liquid inlet, a liquid outlet, and a gas outlet; the sedimentation tank has a liquid inlet and a liquid outlet, and the liquid outlet of the gas dispersion box is connected to the liquid inlet of the sedimentation tank; the pre-ash box has a liquid outlet, which is connected to the liquid inlet of the gas dispersion box; the main ash box has a liquid inlet, which is connected to the liquid outlet of the sedimentation tank. The specific method for cleaning using the aforementioned cleaning device includes the following steps: A. The beet juice from the leaching process enters the pre-ash box for pre-ash treatment to obtain pre-ash juice; B. The pre-ash liquid from the pre-ash box is first aerated in the aeration box, and then enters the sedimentation tank for settling treatment to obtain settled clear liquid; C. The clear liquid obtained from the settling treatment enters the main ash box for main ash treatment to obtain the main ash liquid; D. The main ash liquid from the main ash box enters the first carbon saturation tank for first carbon saturation treatment to obtain first carbon liquid, which is then filtered through a filter to obtain first carbon clear liquid. E. The first-carbon clear juice enters the second-carbon saturation tank for second-carbon saturation treatment to obtain second-carbon juice, which is then filtered through a second filter to obtain second-carbon clear juice.

5. The purification method for sugar production from sugar beets according to claim 1, characterized in that: The sedimentation and separation process is located between the main ash process and the carbon saturation process.

6. The purification method for sugar production from sugar beets according to claim 5, characterized in that: The specific steps include the following: A. The beet juice from the leaching process is pre-limed to obtain pre-limed juice; B. The pre-ash liquid obtained from the pre-ash treatment is subjected to main ash treatment to obtain the main ash liquid; C. The main ash juice obtained from the main ash treatment is first aerated, and then subjected to sedimentation treatment to obtain sedimented clear juice; D. The clarified juice obtained from sedimentation is subjected to 1-carbon saturation treatment to obtain 1-carbon juice, which is then filtered to obtain 1-carbon clarified juice; E. The 1-carbon clear juice is subjected to 2-carbon saturation treatment to obtain 2-carbon juice, which is then filtered to obtain 2-carbon clear juice.

7. The purification method for sugar production from beets according to claim 6, characterized in that: A cleaning device is used for cleaning, which includes a pre-ash box, a main ash box, a gas dispersing box, a sedimentation tank, a primary carbon saturation tank, a first carbon saturation tank, a second carbon saturation tank, and a second filter, all connected in sequence. The gas dispersing box has a liquid inlet, a liquid outlet, and a gas outlet; the sedimentation tank has a liquid inlet and a liquid outlet, and the liquid outlet of the gas dispersing box is connected to the liquid inlet of the sedimentation tank; the main ash box has a liquid outlet, which is connected to the liquid inlet of the gas dispersing box; and the primary carbon saturation tank has a liquid inlet, which is connected to the liquid outlet of the sedimentation tank. The specific method for cleaning using the aforementioned cleaning device includes the following steps: A. The beet juice from the leaching process enters the pre-ash box for pre-ash treatment to obtain pre-ash juice; B. The pre-ash liquid from the pre-ash box enters the main ash box for main ash processing to obtain the main ash liquid; C. The main ash juice obtained from the main ash treatment is first aerated in the aeration box, and then enters the sedimentation tank for sedimentation treatment to obtain the sedimented clear juice; D. The sedimentation slurry obtained from the sedimentation treatment is fed into a carbon saturation tank for carbon saturation treatment to obtain carbon slurry, which is then filtered through a filter to obtain carbon slurry. E. The first-carbon clear juice enters the second-carbon saturation tank for second-carbon saturation treatment to obtain second-carbon juice, which is then filtered through a second filter to obtain second-carbon clear juice.

8. The purification method for sugar production from sugar beets according to claim 4 or 7, characterized in that: The middle section of the gas diffuser box is cylindrical, and the top and bottom are both frustoconical. The gas diffuser port is installed at the top of the gas diffuser box, the liquid inlet of the gas diffuser box is installed at the upper end of the middle section of the gas diffuser box, and the liquid outlet of the gas diffuser box is installed at the bottom of the gas diffuser box. The sedimentation tank is divided into three sections: upper, middle, and lower. The upper section is cylindrical, and the middle section is frustum-shaped. The upper end of the lower section is cylindrical, and the lower end is frustum-shaped. The larger end of the frustum-shaped middle section connects to the upper section, and the smaller end connects to the lower section.

9. The purification method for sugar production from beets according to claim 8, characterized in that: Flocculant is added during the sedimentation and separation process; Furthermore, a mixer is provided between the gas diffuser and the sedimentation tank. The mixer has a mixer inlet, a mixer outlet, and a flocculant inlet. An agitator is provided inside the mixer. The mixer inlet is connected to the gas diffuser outlet, and the mixer outlet is connected to the sedimentation tank inlet. Inside the upper section of the sedimentation tank, there is a distribution ring pipe connected to the liquid inlet of the sedimentation tank and a juice outlet ring pipe connected to the liquid outlet of the sedimentation tank. The distribution ring pipe has several openings. A central guide channel is provided below the perimeter of the openings, and a distribution baffle is provided below the bottom of the central guide channel.

10. The purification device for beet sugar production according to claim 8, characterized in that: Flocculant is added during the sedimentation and separation process; Furthermore, the sedimentation tank is equipped with a flocculant inlet at the top and a stirrer inside the sedimentation tank.

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