System and method for preparing refined industrial sodium carbonate solution

Abstract

The present application discloses a system and method for preparing a refined industrial sodium carbonate solution. The system comprises: a preparation tank used for dissolving industrial sodium carbonate; a loading mechanism, wherein a discharge port of the loading mechanism is connected to a feed port of the preparation tank; an automatic pH regulator, wherein the automatic pH regulator is arranged in the preparation tank, and the loading mechanism is connected to the automatic pH regulator; a filter mechanism, wherein a feed port of the filter mechanism is connected to a discharge port of the preparation tank; and an adsorption mechanism, wherein a feed port of the adsorption mechanism is connected to a discharge port of the filter mechanism.

Description

A system and method for preparing industrial sodium carbonate refined liquid

[0001] This application claims priority to the Chinese patent applications filed with the China Patent Office on December 27, 2023, with application number 202323584440X, and the Chinese patent application filed with the China Patent Office on December 27, 2023, with application number 2023118265260, the entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of soda ash purification, and in particular to a system and method for preparing industrial sodium carbonate refined liquid. Background Art

[0003] Sodium carbonate, also known as soda ash, soda, or ash, is an important chemical raw material and the primary product of the soda ash industry. It is typically a white solid that decomposes easily at high temperatures and is readily soluble in water, with its aqueous solution being weakly alkaline. Soda ash has a wide range of applications, primarily in the glass production, chemical industry, metallurgy, ceramics, gas desulfurization, wastewater treatment, pharmaceutical industry, and salt lake lithium extraction. Many products, such as optical glass, pharmaceutical acidifiers, and battery-grade lithium carbonate, require high purity and impurity levels in the soda ash used as an auxiliary material during production. However, industrial soda ash often contains impurities. Untreated use can lead to unstable product specifications, even exceeding certain standards. For example, in the salt lake lithium extraction industry, high magnesium and boron content in industrial soda ash can result in high magnesium and boron content in the final lithium carbonate product, impacting product quality and production efficiency. Furthermore, for the salt lake lithium extraction industry, which demands high soda ash, using high-purity soda ash directly would significantly increase production costs, making it essential to remove impurities and purify industrial-grade soda ash. Technical issues

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, the present application provides an industrial sodium carbonate refined liquid preparation system, which can effectively remove impurities and purify industrial sodium carbonate.

[0005] Technical Solution

[0006] In the first aspect, the present application provides an industrial sodium carbonate refined liquid preparation system, comprising: a preparation tank for dissolving industrial sodium carbonate; a feeding mechanism, the discharge port of the feeding mechanism is connected to the feed port of the preparation tank; an automatic pH regulator, the automatic pH regulator is arranged in the preparation tank, and the feeding mechanism is connected to the automatic pH regulator for adjusting the pH value in the preparation tank; a filtering mechanism, the feed port of the filtering mechanism is connected to the discharge port of the preparation tank; and an adsorption mechanism, the feed port of the adsorption mechanism is connected to the discharge port of the filtering mechanism.

[0007] In a second aspect, the present application provides a method for preparing an industrial sodium carbonate refined liquid, which is applied to the above-mentioned industrial sodium carbonate refined liquid preparation system, comprising the following steps:

[0008] S1: input a certain volume of solvent into the preparation tank;

[0009] S2: driving the feeding mechanism to feed a preset weight of industrial sodium carbonate into the preparation tank, driving the industrial sodium carbonate to dissolve in the solvent to form an industrial sodium carbonate solution;

[0010] S3: adjusting the pH value of the industrial sodium carbonate solution in the preparation tank by the automatic pH regulator, wherein the pH value range is 8-13;

[0011] S4: inputting the industrial sodium carbonate solution in the preparation tank into the filtering mechanism to filter out the precipitate in the industrial sodium carbonate solution;

[0012] S5: removing impurities from the filtered industrial sodium carbonate solution through the adsorption mechanism to form an industrial sodium carbonate refined solution. Beneficial effects

[0013] In the industrial sodium carbonate refined liquid preparation system, industrial sodium carbonate is transported to the preparation tank by a feeding mechanism, so that the industrial sodium carbonate is dissolved in the preparation tank to form an industrial sodium carbonate solution. The pH value in the preparation tank is adjusted by the automatic pH regulator so that some impurities in the industrial sodium carbonate solution form precipitates. After the precipitates are filtered out by a filtering mechanism, the industrial sodium carbonate solution is removed by an adsorption mechanism to generate an industrial sodium carbonate refined liquid, thereby achieving impurity removal and purification of the industrial sodium carbonate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic structural diagram of an industrial sodium carbonate refined liquid preparation system according to an embodiment of the present application;

[0015] FIG2 is a flow chart of a method for preparing an industrial sodium carbonate refined liquid according to an embodiment of the present application.

[0016] The meanings of the reference numerals are as follows:

[0017] 1. Preparation tank; 11. Agitator; 2. Feeding mechanism; 21. Gravity discharge silo; 22. Ton bag unpacking machine; 3. Filtering mechanism; 4. Adsorption mechanism; 5. Water storage tank; 6. Liquid storage tank; 7. Liquid supply pump.

[0018] Specific embodiments of the present invention

[0019] In one embodiment, a water storage tank for storing the solvent is further included, the discharge port of the water storage tank is connected to the feed port of the preparation tank, and the automatic pH regulator is connected to the water storage tank.

[0020] In one embodiment, a liquid storage tank is further included, and the feed port of the liquid storage tank is connected to the discharge port of the adsorption mechanism.

[0021] In one embodiment, the feeding mechanism includes a gravity feeding bin, and the discharge port of the gravity feeding bin is connected to the feed port of the preparation tank.

[0022] In one embodiment, a ton bag unpacking machine is provided at the feed port of the gravity feed silo.

[0023] In one embodiment, a stirrer is provided in the preparation tank, and the stirrer can rotate relative to the preparation tank to stir the solution in the preparation tank.

[0024] In one embodiment, a liquid supply pump is further included, wherein the feed port of the liquid supply pump is connected to the discharge port of the preparation tank, and the discharge port of the liquid supply pump is connected to the feed port of the filtering mechanism.

[0025] In one embodiment, the filtering mechanism is one or more of a precision filter, a ceramic membrane filter, and a multimedia filter.

[0026] In one embodiment, the adsorption mechanism includes at least one adsorption tower, and the feed port of the adsorption tower is connected to the discharge port of the filtration mechanism.

[0027] In one embodiment, the adsorption tower is filled with boron removal resin.

[0028] Example 1:

[0029] Referring to FIG1 , this embodiment discloses a system for preparing industrial sodium carbonate refined liquid. Optionally, the industrial sodium carbonate refined liquid preparation system includes: a preparation tank 1, a feeding mechanism 2, an automatic pH regulator, a filtering mechanism 3, and an adsorption mechanism 4; Optionally, the preparation tank 1 is used to dissolve industrial sodium carbonate, the discharge port of the feeding mechanism 2 is connected to the feed port of the preparation tank 1, the automatic pH regulator is arranged in the preparation tank 1, and the feeding mechanism 2 is connected to the automatic pH regulator for adjusting the pH value in the preparation tank 1, the feed port of the filtering mechanism 3 is connected to the discharge port of the preparation tank 1, the adsorption mechanism 4 is connected to the filter mechanism 3, and the filter mechanism 3 is connected to the filter mechanism 3. The feed port of the structure 4 is connected to the discharge port of the filtering mechanism 3; preferably, industrial sodium carbonate is transported to the preparation tank 1 through the feeding mechanism 2, so that the industrial sodium carbonate is dissolved into an industrial sodium carbonate solution in the preparation tank 1, and the pH value in the preparation tank 1 is adjusted by the automatic pH regulator so that part of the calcium and magnesium ions in the industrial sodium carbonate solution form a precipitate. After the precipitate is filtered out by the filtering mechanism 3, the industrial sodium carbonate solution is removed by the adsorption mechanism 4 to generate an industrial sodium carbonate refined liquid, thereby achieving impurity removal and purification of the industrial sodium carbonate.

[0030] In one embodiment, the preparation tank 1 can be arranged in a trough shape, or can be a barrel, box, can, etc. that can store solvents and solutions and is a reaction place for dissolving industrial sodium carbonate; in one embodiment, the feeding mechanism 2 can be a feeding pipe, a feeding bin, a feeding hopper, etc. that can transport industrial sodium carbonate to the preparation tank 1; in one embodiment, the pH sensor of the automatic pH regulator is arranged in the preparation tank 1, for detecting the pH value of the solution in the preparation tank 1, and transmitting it to the industrial pH meter, and then according to the requirements of the production process, the pH value of the solution in the preparation tank 1 is detected by the industrial pH meter. The high and low control points are set on the H meter. After comparing the input pH signal with the high and low set values, the industrial pH meter outputs a switch signal or a proportional control signal to the control box, which then adjusts the feeding of the feeding mechanism 2, thereby adjusting the specific gravity of the material in the preparation tank 1 to adjust the pH value in the preparation tank 1. In one embodiment, the automatic pH regulator can adjust the amount of industrial sodium carbonate delivered to the preparation tank 1 by the feeding mechanism 2 by detecting the pH value of the solution in the preparation tank 1, thereby adjusting the pH value in the preparation tank 1. In one embodiment, the filtering mechanism 3 can be any filtering device that can filter a solution at a target pH value and remove precipitates or insoluble matter in the solution. In one embodiment, the adsorption mechanism 4 is used to adsorb and remove impurities from the solution, thereby removing impurities in the solution and purifying the solution.

[0031] In one embodiment, a container or corresponding equipment can be pre-installed to store the solvent. When preparing the solution, the solvent can be directly extracted and transported to the preparation tank 1 to optimize the solvent loading process. Preferably, a water tank 5 for storing the solvent is also included, the discharge port of the water tank 5 is connected to the feed port of the preparation tank 1, and the automatic pH regulator is connected to the water tank 5. In one embodiment, the solvent is pure water, ultrapure water or distilled water. In one embodiment, when preparing the solution, a certain volume of solvent can be pre-input into the preparation tank 1 through the water tank 5. When the automatic pH regulator adjusts the pH value in the preparation tank 1, the amount of solvent transported from the water tank 5 to the preparation tank 1 can be further adjusted. In one embodiment, the water storage tank 5 is connected to a pump group, and the solvent in the water storage tank 5 is transported to the preparation tank 1 through the pump group. In one embodiment, there is a height difference or water level difference between the water storage tank 5 and the preparation tank 1. By opening the valve group provided between the water storage tank 5 and the preparation tank 1, the solvent in the water storage tank 5 can be transported to the preparation tank 1.

[0032] In one embodiment, the feeding mechanism 2 includes a gravity feeding bin 21, and the discharge port of the gravity feeding bin 21 is connected to the feed port of the preparation tank 1. Preferably, the gravity feeding bin 21 is arranged above the preparation tank 1, and the unpacked industrial sodium carbonate is loaded into the gravity feeding bin 21. When the industrial sodium carbonate in the gravity feeding bin 21 reaches a preset weight, the discharge port of the gravity feeding bin 21 is opened and the material is discharged so that the industrial sodium carbonate in the gravity feeding bin 21 falls into the preparation tank 1. In one embodiment, the discharge weight of the gravity feeding bin 21 can be preset by the user. When the preset weight of industrial sodium carbonate falls into the preparation tank 1 loaded with a certain volume of solvent, it can be prepared into an industrial sodium carbonate solution of a preset concentration, thereby realizing automatic preparation of the industrial sodium carbonate solution. In one embodiment, the gravity feed silo 21 may be provided with a silo body for accommodating industrial sodium carbonate and a weight sensor for weighing the silo body and / or the industrial sodium carbonate accommodated in the silo body. Preferably, the weight of the industrial sodium carbonate inside the silo body is detected by the weight sensor. When the industrial sodium carbonate reaches a preset weight, the discharge port of the silo body is opened to allow the industrial sodium carbonate in the gravity feed silo 21 to fall into the preparation tank 1.

[0033] In one embodiment, when the automatic pH regulator adjusts the pH value in the preparation tank 1, the automatic pH regulator can detect the pH value of the current solution, adjust the amount of industrial sodium carbonate or solvent in the solution according to the pH value of the current solution, and feed back to the gravity feed bin 21 or the water storage tank 5, thereby adding corresponding materials and changing the pH value in the solution. Furthermore, under normal conditions, the pH value of pure sodium carbonate solution is up to 12, so when the pH value in the solution needs to be ≥11.5, the pH value of the solution can be increased by adding sodium hydroxide, that is, the automatic pH regulator is also provided with a feeding module for feeding sodium hydroxide, so that the automatic pH regulator can also adjust the amount of water and sodium hydroxide added to make the pH value of the solution meet the process requirements.

[0034] In one embodiment, a ton bag unpacking machine 22 is provided at the feed port of the gravity feed silo 21. In one embodiment, the ton bag unpacking machine 22 includes a robotic arm or a conveyor belt for conveying industrial sodium carbonate packaged in ton bags. The robotic arm or the conveyor belt transports the industrial sodium carbonate packaged in ton bags to an unpacking station, where the bags are automatically unpacked by a cutter, an electric heating bag breaking device, etc., causing the industrial sodium carbonate to fall into the gravity feed silo 21. In one embodiment, the unpacking station is provided above the gravity feed silo 21. When the cutter and other components automatically unpack the industrial sodium carbonate packaged in ton bags, the industrial sodium carbonate automatically falls into the gravity feed silo 21 under the action of gravity. In one embodiment, after the industrial sodium carbonate packaged in ton bags is unpacked, the industrial sodium carbonate can also be stored in a corresponding compartment and then transported to the gravity feed silo 21 by a conveying device. In this embodiment, the solvent is transported to the preparation tank 1 through the water storage tank 5, and then the industrial sodium carbonate packaged in ton bags is automatically unpacked by the ton bag unpacking machine 22 and transported to the gravity feed bin 21. When the industrial sodium carbonate in the gravity feed bin 21 reaches a preset weight, the discharge port of the gravity feed bin 21 is opened to allow the industrial sodium carbonate in the gravity feed bin 21 to fall into the preparation tank 1, thereby realizing fully automatic loading of industrial sodium carbonate.

[0035] In one embodiment, a stirrer 11 is provided in the preparation tank 1, and the stirrer 11 can rotate relative to the preparation tank 1 to stir the solution in the preparation tank. Preferably, a driving motor is further included that is provided outside the preparation tank 1, and the stirrer 11 is driven by the driving motor to rotate in the preparation tank so that the stirrer 11 stirs the solution in the preparation tank, thereby promoting the full and uniform mixing of industrial sodium carbonate and the solvent, improving the dissolution efficiency of industrial sodium carbonate in the preparation tank 1, and forming an industrial sodium carbonate solution. In one embodiment, the solution formed by the full mixing of industrial sodium carbonate and the solvent is adjusted by the automatic pH regulator to adjust the pH value of the solution in the preparation tank 1. Preferably, the pH value of the adjusted industrial sodium carbonate solution is in the range of 8-13, so that impurities such as calcium ions and magnesium ions in the industrial sodium carbonate solution form carbonate or hydroxide precipitates in the solution, so that a precipitate is generated in the industrial sodium carbonate solution.

[0036] In one embodiment, the solution after adjusting the pH value is filtered to remove precipitates in the solution, reduce impurities such as calcium ions and magnesium ions in the solution, and improve the purity of the solution. In one embodiment, a liquid supply pump 7 is further included, the feed port of the liquid supply pump 7 is connected to the discharge port of the preparation tank 1, and the discharge port of the liquid supply pump 7 is connected to the feed port of the filtering mechanism 3. Preferably, the solution after adjusting the pH value in the preparation tank 1 is transported to the filtering mechanism 3 by the liquid supply pump 7 for filtration, thereby filtering out precipitates formed in the solution by impurities such as calcium ions and magnesium ions in the solution. Preferably, the filtering mechanism 3 is one or more of a precision filter, a ceramic membrane filter, and a multi-media filter.

[0037] In one embodiment, after filtering out the precipitate in the solution, the solution needs to be further subjected to adsorption and impurity removal to remove boron, potassium, fluorine, manganese, silicon, organic matter, etc. in the solution. Preferably, the adsorption mechanism 4 includes at least one adsorption tower, and the feed port of the adsorption tower is connected to the discharge port of the filtering mechanism 3. In one embodiment, the adsorption mechanism 4 can be composed of one or more adsorption towers to improve the impurity removal effect. In one embodiment, the adsorption tower is filled with a boron removal resin to improve the impurity removal effect of the adsorption mechanism 4 on boron in the solution. In one embodiment, the resin in the adsorption tower can be replaced so that the adsorption tower can improve the treatment effect of potassium, fluorine, manganese, silicon, organic matter, etc. in the solution. In one embodiment, the adsorption mechanism 4 includes multiple one or more adsorption towers, and each adsorption tower or every few adsorption towers are respectively provided with different resins to specifically remove impurities such as boron, potassium, fluorine, manganese, silicon, organic matter, etc. in the solution, thereby further improving the purity of the industrial sodium carbonate solution to obtain industrial sodium carbonate refined liquid.

[0038] In one embodiment, a liquid storage tank 6 is further included, and the feed port of the liquid storage tank 6 is connected to the discharge port of the adsorption mechanism 4. Preferably, the industrial sodium carbonate solution removed by the adsorption mechanism 4 is stored in the liquid storage tank 6 to store the industrial sodium carbonate refined liquid.

[0039] Referring to FIG1 , in this embodiment, a certain volume of solvent is transported to the preparation tank 1 through the water storage tank 5 for storing the solvent, and the feeding mechanism 2 transports the industrial sodium carbonate to the preparation tank 1. In one embodiment, the feeding mechanism 2 includes a gravity feed bin 21, and a ton bag unpacking machine 22 is provided at the feed port of the gravity feed bin 21. After the industrial sodium carbonate packaged in ton bags is automatically unpacked by the ton bag unpacking machine 22, the unpacked industrial sodium carbonate is transported to the gravity feed bin 21. When the gravity feed bin 21 is opened, the industrial sodium carbonate is automatically unpacked. After the industrial sodium carbonate in 1 reaches a preset weight, the discharge port of the gravity feed bin 21 is opened and the material is discharged, so that the industrial sodium carbonate in the gravity feed bin 21 falls into the preparation tank 1, so that the industrial sodium carbonate is dissolved in the solvent to form an industrial sodium carbonate solution. In one embodiment, a stirrer 11 is provided in the preparation tank 1, and the stirrer 11 is driven to rotate in the preparation tank to promote the full mixing of industrial sodium carbonate and the solvent, thereby improving the dissolution efficiency of industrial sodium carbonate in the preparation tank 1 to form an industrial sodium carbonate solution. Furthermore, the automatic pH regulator detects the pH value of the current industrial sodium carbonate solution, thereby adding corresponding materials and adjusting the pH value of the industrial sodium carbonate solution so that the pH value range of the industrial sodium carbonate solution is 8-13, so that impurities such as calcium ions and magnesium ions in the solution form precipitates in the solution. A precipitate is generated in the industrial sodium carbonate solution, and then the solution after adjusting the pH value in the preparation tank 1 is transported to the filtering mechanism 3 by the liquid supply pump 7 for filtration to remove the precipitate in the industrial sodium carbonate solution, thereby filtering out the precipitate formed in the solution by impurities such as calcium ions and magnesium ions in the industrial sodium carbonate solution to form an industrial sodium carbonate refined liquid. The industrial sodium carbonate refined liquid is then input into the adsorption mechanism 4. In one embodiment, the adsorption mechanism 4 includes at least one adsorption tower, and the adsorption tower is filled with a boron removal resin to improve the impurity removal effect of the adsorption mechanism 4 on boron in the solution, further remove boron impurities in the industrial sodium carbonate refined liquid, and then the industrial sodium carbonate refined liquid after the boron removal by the adsorption mechanism 4 is stored through the liquid storage tank 6.

[0040] Example 2:

[0041] Referring to FIG2 , a method for preparing an industrial sodium carbonate refined liquid is applied to the above-mentioned industrial sodium carbonate refined liquid preparation system, comprising the following steps:

[0042] S1: input a certain volume of solvent into the preparation tank 1;

[0043] Specifically, the solvent can be directly delivered to the preparation tank. In one embodiment, a container or corresponding equipment can be pre-set to store the solvent. When preparing the solution, the stored solvent is then delivered to the preparation tank 1. Preferably, the solvent is pure water, ultrapure water, or distilled water. In one embodiment, the solvent is pre-stored in the water storage tank 5. When preparing the industrial sodium carbonate solution, a certain volume of solvent is delivered to the preparation tank through the water storage tank 5.

[0044] S2: driving the feeding mechanism 2 to feed a preset weight of industrial sodium carbonate into the preparation tank 1, driving the industrial sodium carbonate to dissolve in the solvent to form an industrial sodium carbonate solution;

[0045] Specifically, industrial sodium carbonate is transported to the preparation tank 1 by the feeding mechanism 2, so that the industrial sodium carbonate is dissolved into an industrial sodium carbonate solution in the preparation tank 1. In one embodiment, the feeding mechanism 2 includes a gravity feed bin 21, and a ton bag unpacking machine 22 is provided at the feed port of the gravity feed bin 21. Preferably, the industrial sodium carbonate packaged in ton bags is fed into the automatic unpacking machine, and after the ton bag unpacking machine 22 automatically unpacks the bags, the unpacked industrial sodium carbonate is transported to the gravity feed bin 21. When the industrial sodium carbonate in the gravity feed bin 21 reaches a preset weight, the discharge port of the gravity feed bin 21 is opened and the material is discharged so that the industrial sodium carbonate in the gravity feed bin 21 falls into the preparation tank 1. In one embodiment, an agitator 11 is provided in the preparation tank 1, and the agitator 11 is driven to rotate in the preparation tank to promote the full mixing of industrial sodium carbonate and the solvent, thereby improving the dissolution efficiency of industrial sodium carbonate in the solvent in the preparation tank 1 to form an industrial sodium carbonate solution.

[0046] S3: adjusting the pH value of the industrial sodium carbonate solution in the preparation tank 1 by the automatic pH regulator, wherein the pH value range is 8-13;

[0047] Specifically, the automatic pH regulator can adjust the amount of industrial sodium carbonate delivered to the preparation tank 1 by detecting the pH value of the industrial sodium carbonate solution in the preparation tank 1 and adjusting the amount of industrial sodium carbonate delivered to the preparation tank 1 by the feeding mechanism 2, thereby adjusting the pH value in the preparation tank 1. Furthermore, under normal conditions, the pH value of the pure sodium carbonate solution is up to 12, so when the pH value in the solution needs to be ≥11.5, the pH value of the solution can be increased by adding sodium hydroxide, that is, the automatic pH regulator is also provided with a feeding module for adding sodium hydroxide, so that the automatic pH regulator can also adjust the amount of water and sodium hydroxide added to make the pH value of the solution meet the process requirements. Preferably, the pH value range of the adjusted industrial sodium carbonate solution is 8-13, so that impurities such as calcium ions and magnesium ions in the industrial sodium carbonate solution form carbonate or hydroxide precipitation in the solution, so that a precipitate is generated in the industrial sodium carbonate solution.

[0048] S4: inputting the industrial sodium carbonate solution in the preparation tank 1 into the filtering mechanism 3 to filter out the precipitate in the industrial sodium carbonate solution;

[0049] Specifically, the solution after adjusting the pH value is filtered by the filtering mechanism 3, thereby filtering out the precipitate in the solution, reducing impurities such as calcium ions and magnesium ions in the solution, and improving the purity of the solution. Preferably, the solution after adjusting the pH value in the preparation tank 1 is transported to the filtering mechanism 3 by the liquid supply pump 7 for filtration, thereby filtering out carbonate or hydroxide precipitates formed in the solution by impurities such as calcium ions and magnesium ions in the solution. Preferably, the filtering mechanism 3 is one or more of a precision filter, a ceramic membrane filter and a multi-media filter, thereby filtering out the precipitate in the industrial sodium carbonate solution and improving the purity of the solution.

[0050] S5: removing impurities from the filtered industrial sodium carbonate solution through the adsorption mechanism 4 to form an industrial sodium carbonate refined solution.

[0051] Specifically, after filtering out the precipitate in the solution, the industrial sodium carbonate solution is further adsorbed and removed by the adsorption mechanism 4 to remove impurities such as boron, potassium, fluorine, manganese, silicon, and organic matter in the solution. In one embodiment, the adsorption mechanism 4 can be composed of a single-stage or multi-stage adsorption tower to improve the impurity removal effect. In one embodiment, the adsorption tower is filled with a boron removal resin to improve the impurity removal effect of the adsorption mechanism 4 on boron in the solution. In one embodiment, the resin in the adsorption tower can be replaced so that the adsorption tower can improve the treatment effect of potassium, fluorine, manganese, silicon, organic matter, etc. in the solution. In one embodiment, the adsorption mechanism 4 includes multiple single-stage or multi-stage adsorption towers, and each adsorption tower or every few adsorption towers are respectively provided with different resins to specifically remove impurities such as boron, potassium, fluorine, manganese, silicon, and organic matter in the solution, thereby further improving the purity of the industrial sodium carbonate solution to obtain industrial sodium carbonate refined liquid.

[0052] In one embodiment, the above steps S1-S5 can be repeatedly cycled to achieve automated and continuous production of industrial sodium carbonate refined liquid.

[0053] In one embodiment, the content of each indicator of industrial sodium carbonate involved in this embodiment is shown in Table 1

[0054] Table 1

[0055]

[0056] Experimental Example 1:

[0057] In the first step, 5000 L of pure water is input into the preparation tank 1.

[0058] In the second step, the industrial sodium carbonate packaged in ton bags is fed into an automatic unpacking machine. After the bags are automatically unpacked by the ton bag unpacking machine 22, the unpacked industrial sodium carbonate is transported to the gravity feed bin 21. When the industrial sodium carbonate in the gravity feed bin 21 reaches 1 ton, the discharge port below the gravity feed bin 21 will be opened and the material will be discharged, and the industrial sodium carbonate will be put into the preparation tank 1. At the same time, the agitator 11 in the preparation tank 1 starts to run, and the industrial sodium carbonate and the solvent are fully mixed to dissolve the industrial sodium carbonate.

[0059] In the third step, the pH value of the dissolved industrial sodium carbonate solution is adjusted to 10 using the automatic pH regulator.

[0060] In the fourth step, the pH-adjusted industrial sodium carbonate solution is pumped into a ceramic membrane filter through the liquid supply pump 7 to filter out particulate matter or sediment.

[0061] In the fifth step, the filtered industrial sodium carbonate solution is passed through the adsorption tower for boron removal, and the adsorption tower is filled with the boron removal resin.

[0062] In the sixth step, after the industrial sodium carbonate solution is qualified for boron removal, the resulting industrial sodium carbonate refined liquid is stored in the liquid storage tank 6.

[0063] Step 7: Repeat steps 1 to 6 to start automated and continuous production.

[0064] Experimental Example 2:

[0065] In the first step, 5000 L of pure water is input into the preparation tank 1.

[0066] In the second step, the industrial sodium carbonate packaged in ton bags is fed into an automatic unpacking machine. After the bags are automatically unpacked by the ton bag unpacking machine 22, the unpacked industrial sodium carbonate is transported to the gravity feed bin 21. When the industrial sodium carbonate in the gravity feed bin 21 reaches 1 ton, the discharge port below the gravity feed bin 21 will be opened and the material will be discharged, and the industrial sodium carbonate will be put into the preparation tank 1. At the same time, the agitator 11 in the preparation tank 1 starts to run, and the industrial sodium carbonate and the solvent are fully mixed to dissolve the industrial sodium carbonate.

[0067] In the third step, the pH value of the dissolved industrial sodium carbonate solution is adjusted to 11 using the automatic pH regulator.

[0068] In the fourth step, the pH-adjusted industrial sodium carbonate solution is pumped into a ceramic membrane filter through the liquid supply pump 7 to filter out particulate matter or sediment.

[0069] In the fifth step, the filtered industrial sodium carbonate solution is passed through the adsorption tower for boron removal, and the adsorption tower is filled with the boron removal resin.

[0070] In the sixth step, after the industrial sodium carbonate solution is qualified for boron removal, the resulting industrial sodium carbonate refined liquid is stored in the liquid storage tank 6.

[0071] Step 7: Repeat steps 1 to 6 to start automated and continuous production.

[0072] Experimental Example 3:

[0073] In the first step, 5000 L of pure water is input into the preparation tank 1.

[0074] In the second step, the industrial sodium carbonate packaged in ton bags is fed into an automatic unpacking machine. After the bags are automatically unpacked by the ton bag unpacking machine 22, the unpacked industrial sodium carbonate is transported to the gravity feed bin 21. When the industrial sodium carbonate in the gravity feed bin 21 reaches 1 ton, the discharge port below the gravity feed bin 21 will be opened and the material will be discharged, and the industrial sodium carbonate will be put into the preparation tank 1. At the same time, the agitator 11 in the preparation tank 1 starts to run, and the industrial sodium carbonate and the solvent are fully mixed to dissolve the industrial sodium carbonate.

[0075] In the third step, the pH value of the dissolved industrial sodium carbonate solution is adjusted to 12 using the automatic pH regulator.

[0076] In the fourth step, the pH-adjusted industrial sodium carbonate solution is pumped into a ceramic membrane filter through the liquid supply pump 7 to filter out precipitates or particulate matter.

[0077] In the fifth step, the filtered industrial sodium carbonate solution is passed through the adsorption tower for boron removal, and the adsorption tower is filled with the boron removal resin.

[0078] In the sixth step, after the industrial sodium carbonate solution is qualified for boron removal, the resulting industrial sodium carbonate refined liquid is stored in the liquid storage tank 6.

[0079] Step 7: Repeat steps 1 to 6 to start automated and continuous production.

[0080] Experimental Example 4:

[0081] In the first step, 3000 L of pure water is input into the preparation tank 1.

[0082] In the second step, the industrial sodium carbonate packaged in ton bags is fed into an automatic unpacking machine. After the bags are automatically unpacked by the ton bag unpacking machine 22, the unpacked industrial sodium carbonate is transported to the gravity feed bin 21. When the industrial sodium carbonate in the gravity feed bin 21 reaches 0.5 tons, the discharge port below the gravity feed bin 21 will be opened and the material will be discharged, and the industrial sodium carbonate will be put into the preparation tank 1. At the same time, the agitator 11 in the preparation tank 1 starts to run, and the industrial sodium carbonate and the solvent are fully mixed to dissolve the industrial sodium carbonate.

[0083] In the third step, the pH value of the dissolved industrial sodium carbonate solution is adjusted to 11 using the automatic pH regulator.

[0084] In the fourth step, the pH-adjusted industrial sodium carbonate solution is pumped into a precision filter through the liquid supply pump 7 to filter out precipitates or particulate matter.

[0085] In the fifth step, the filtered industrial sodium carbonate solution is passed through the adsorption tower for boron removal, and the adsorption tower is filled with the boron removal resin.

[0086] In the sixth step, after the industrial sodium carbonate solution is qualified for boron removal, the resulting industrial sodium carbonate refined liquid is stored in the liquid storage tank 6.

[0087] Step 7: Repeat steps 1 to 6 to start automated and continuous production.

[0088] Experimental Example 5:

[0089] In the first step, 10,000 L of pure water is input into the preparation tank 1.

[0090] In the second step, the industrial sodium carbonate packaged in ton bags is fed into an automatic unpacking machine. After the bags are automatically unpacked by the ton bag unpacking machine 22, the unpacked industrial sodium carbonate is transported to the gravity feed bin 21. When the industrial sodium carbonate in the gravity feed bin 21 reaches 1 ton, the discharge port below the gravity feed bin 21 will be opened and the material will be discharged, and the industrial sodium carbonate will be put into the preparation tank 1. At the same time, the agitator 11 in the preparation tank 1 starts to run, and the industrial sodium carbonate and the solvent are fully mixed to dissolve the industrial sodium carbonate.

[0091] In the third step, the pH value of the dissolved industrial sodium carbonate solution is adjusted to 12 using the automatic pH regulator.

[0092] In the fourth step, the pH-adjusted industrial sodium carbonate solution is pumped into a precision filter through the liquid supply pump 7 to filter out sediment or particulate matter.

[0093] In the fifth step, the filtered industrial sodium carbonate solution is passed through the adsorption tower for boron removal, and the adsorption tower is filled with the boron removal resin.

[0094] In the sixth step, after the industrial sodium carbonate solution is qualified for boron removal, the resulting industrial sodium carbonate refined liquid is stored in the liquid storage tank 6.

[0095] Step 7: Repeat steps 1 to 6 to start automated and continuous production.

[0096] Comparative Example 1:

[0097] The main content of industrial sodium carbonate used in this comparative example is 99.2%, the Ca2+ content is 108.34 ppm, the Mg2+ content is 120.51 ppm, and the B content is 6.42 ppm.

[0098] The preparation method of industrial sodium carbonate refined liquid in this comparative example is carried out according to the following steps:

[0099] In the first step, 5000 L of pure water is input into the preparation tank 1.

[0100] In the second step, the industrial sodium carbonate packaged in ton bags is fed into an automatic unpacking machine. After the bags are automatically unpacked by the ton bag unpacking machine 22, the unpacked industrial sodium carbonate is transported to the gravity feed bin 21. When the industrial sodium carbonate in the gravity feed bin 21 reaches 1 ton, the discharge port below the gravity feed bin 21 will be opened and the material will be discharged, and the industrial sodium carbonate will be put into the preparation tank 1. At the same time, the agitator 11 in the preparation tank 1 starts to run, and the industrial sodium carbonate and the solvent are fully mixed to dissolve the industrial sodium carbonate.

[0101] In the third step, the pH value of the dissolved industrial sodium carbonate solution is adjusted to 12 using the automatic pH regulator.

[0102] In the fourth step, the pH-adjusted industrial sodium carbonate solution is pumped into a precision filter through the liquid supply pump 7 to filter out sediment or particulate matter.

[0103] In the fifth step, the filtered industrial sodium carbonate solution is passed through the adsorption tower for boron removal, and the adsorption tower is filled with the boron removal resin.

[0104] In the sixth step, after the industrial sodium carbonate solution is qualified for boron removal, the resulting industrial sodium carbonate refined liquid is stored in the liquid storage tank 6.

[0105] Step 7: Repeat steps 1 to 6 to start automated and continuous production.

[0106] The results of the determination of the ion content in the soda ash after dissolution, pH adjustment, and the final soda ash refined solution prepared using the industrial sodium carbonate refined solution preparation method in Experimental Examples 1-5 and Comparative Example 1 are shown in Table 2 below.

[0107] Table 2

[0108]

[0109] As can be seen from the above examples, the method for preparing a refined industrial sodium carbonate solution provided in the present application can effectively reduce the content of boron ions and calcium and magnesium ions from industrial sodium carbonate with high boron and high calcium and magnesium contents, and produce a refined sodium carbonate solution with low boron and low calcium and magnesium ion contents, which can provide conditions for the subsequent production of high-purity carbonates such as lithium carbonate. At the same time, the method provided in the present application has the advantages of a wide range of applicability of boron concentration, applicability to high calcium and magnesium concentrations, simple process, automation and easy industrial production.

Claims

1. An industrial sodium carbonate refining liquid preparation system, comprising: A preparation tank (1) for dissolving industrial sodium carbonate; A feeding mechanism (2), the discharge port of the feeding mechanism (2) being connected to the feeding port of the preparation tank (1); An automatic pH regulator, the automatic pH regulator being arranged in the preparation tank (1), and the feeding mechanism (2) being connected to the automatic pH regulator for adjusting the pH value in the preparation tank (1); A filtering mechanism (3), the feeding port of the filtering mechanism (3) being connected to the discharge port of the preparation tank (1); An adsorption mechanism (4), the feeding port of the adsorption mechanism (4) being connected to the discharge port of the filtering mechanism (3).

2. The industrial sodium carbonate refining liquid preparation system according to claim 1, further comprising a water storage tank (5) for storing a solvent, the discharge port of the water storage tank (5) being connected to the feeding port of the preparation tank (1), and the automatic pH regulator being connected to the water storage tank (5).

3. The industrial sodium carbonate refining liquid preparation system according to claim 1, further comprising a liquid storage tank (6), the feeding port of the liquid storage tank (6) being connected to the discharge port of the adsorption mechanism (4).

4. The industrial sodium carbonate refining liquid preparation system according to claim 1, wherein: The feeding mechanism (2) comprises a gravity feeding bin (21), the discharge port of the gravity feeding bin (21) being connected to the feeding port of the preparation tank (1).

5. The industrial sodium carbonate refining liquid preparation system according to claim 4, wherein: A ton bag unpacking machine (22) is arranged at the feeding port of the gravity feeding bin (21).

6. The industrial sodium carbonate refining liquid preparation system according to claim 1, wherein: A stirrer (11) is arranged in the preparation tank (1), and the stirrer (11) can rotate relative to the preparation tank (1) to stir the solution in the preparation tank.

7. The industrial sodium carbonate refining liquid preparation system according to claim 1, further comprising a liquid supply pump (7), the feeding port of the liquid supply pump (7) being connected to the discharge port of the preparation tank (1), and the discharge port of the liquid supply pump (7) being connected to the feeding port of the filtering mechanism (3).

8. The industrial sodium carbonate refining liquid preparation system according to any one of claims 1-7, wherein: The filtering mechanism (3) is one or more of a precision filter, a ceramic membrane filter, and a multi-media filter.

9. The industrial sodium carbonate refining liquid preparation system according to any one of claims 1-7, wherein: The adsorption mechanism (4) comprises at least one adsorption tower, the feeding port of the adsorption tower being connected to the discharge port of the filtering mechanism (3).

10. The industrial sodium carbonate refined liquid preparation system according to claim 9, wherein: The adsorption tower is filled with boron-removing resin.

11. An industrial sodium carbonate refining liquid preparation method, applied to the industrial sodium carbonate refining liquid preparation system according to any one of claims 1-10, comprising the following steps: S1: Input a certain volume of solvent into the preparation tank (1); S2: Drive the feeding mechanism (2) to put a preset weight of industrial sodium carbonate into the preparation tank (1), and drive the industrial sodium carbonate to dissolve in the solvent to form an industrial sodium carbonate solution; S3: Adjust the pH value of the industrial sodium carbonate solution in the preparation tank (1) through the automatic pH regulator, wherein the pH value range is 8-13; S4: Input the industrial sodium carbonate solution in the preparation tank (1) into the filtering mechanism (3) to filter out the precipitates in the industrial sodium carbonate solution; S5: Remove impurities from the filtered industrial sodium carbonate solution through the adsorption mechanism (4) to form an industrial sodium carbonate refining liquid.

Images