Sodium carbonate purification system

Abstract

The sodium carbonate purification system comprises a water purification tank, a supernatant temporary storage tank, a vacuum feeding machine, a preparation kettle, a filtering system, at least one carbonization kettle, a crystallization kettle, a centrifugal machine, a water chilling unit and a drying machine, the supernatant temporary storage tank is connected with the purified water tank, and the purified water tank is connected with an inlet of the supernatant temporary storage tank; the supernatant temporary storage tank is connected with the preparation kettle, the vacuum feeding machine is connected with the preparation kettle, the preparation kettle is connected with the filtering system and the carbonization kettle, the carbonization kettle is connected with the crystallizing tank, the crystallizing tank is connected with the centrifugal machine, the centrifugal machine is connected with the drying machine, and the water chilling unit is respectively connected with the preparation kettle, the carbonization kettle and the crystallizing kettle. The sodium carbonate purification system disclosed by the utility model can reduce energy consumption and improve production efficiency, so that the production cost is reduced, and economic benefits are brought to enterprises.

Description

Technical Field

[0001] The utility model relates to the field of sodium carbonate preparation, in particular to a sodium carbonate purification system. Background Art

[0002] As an important inorganic chemical product, sodium carbonate is widely used in light industry, daily chemicals, building materials, food, scientific research and medicine. According to the purity, sodium carbonate is divided into industrial grade and reagent grade. In my country, although the output of industrial grade sodium carbonate is large, there is overcapacity and low added value. Reagent grade sodium carbonate is widely used in teaching and scientific research due to its low impurity content and high added value. It is one of the necessary reagents in the laboratory.

[0003] There are some major disadvantages in the practical application of sodium carbonate purification technology. The main physical purification technologies include crystallization separation, washing and solvent extraction. Crystallization separation requires a lot of energy and is affected by the content and type of impurities. The effect is not ideal and the production cycle is long. The washing method wastes resources and has high processing costs, and can only remove soluble impurities. The solvent extraction method uses organic solvents to cause environmental pollution, the operation is complicated and is only applicable to solutes with large differences. The main disadvantages of chemical purification technology include precipitation, gas adsorption and ion exchange. The precipitation method increases production costs and the precipitate requires subsequent treatment, and has high requirements for operating conditions. The gas adsorption method requires specific gases and strict operating requirements, and is only applicable to solute and gas reactions. The resin replacement and regeneration process of the ion exchange method increases costs and burdens the environment, and is only applicable to specific adsorption situations. The above disadvantages limit the efficiency and cost control of sodium carbonate purification. To overcome these problems, technological innovation is needed to develop more efficient, environmentally friendly and economical sodium carbonate purification technologies.

[0004] The purpose of the sodium carbonate purification project is to develop an efficient and environmentally friendly sodium carbonate purification technology to meet industrial production and market needs. Sodium carbonate is an important chemical raw material and is widely used in various industries, including glass manufacturing, textiles, papermaking, detergents, metallurgy and other fields. However, traditional sodium carbonate purification methods have some problems, such as high energy consumption, large amounts of waste gas and wastewater, etc., which have a significant impact on the environment.

[0005] Therefore, it is of great significance to develop an efficient and environmentally friendly sodium carbonate purification technology. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art, provide a sodium carbonate purification system, and solve the technical problems of low efficiency and high cost in the current sodium carbonate preparation process.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A sodium carbonate purification system is provided, comprising:

[0009] A water purification tank, a supernatant storage tank, a vacuum feeder, a preparation kettle, a filtration system, at least one carbonization kettle, a crystallization kettle, a centrifuge, a chiller and a dryer;

[0010] The supernatant temporary storage tank is connected to the clean water tank and heats the input clean water to a predetermined temperature;

[0011] The clean water tank is connected to the inlet of the supernatant temporary storage tank;

[0012] The supernatant temporary storage tank is connected to the preparation kettle and is suitable for conveying purified water at a predetermined temperature into the preparation kettle;

[0013] The vacuum feeder is connected to the preparation kettle and is suitable for adding industrial soda ash into the preparation kettle;

[0014] The preparation kettle is connected to the filtering system and the carbonizing kettle, and the preparation kettle is suitable for filtering the soda ash suspension and sending it to the carbonizing kettle for carbonization treatment;

[0015] The carbonization kettle is connected to the crystallization tank and is suitable for cooling and crystallizing the carbonized soda ash filtrate;

[0016] The crystallization tank is connected to a centrifuge, and the centrifuge is used to spin dry to obtain high-purity sodium bicarbonate;

[0017] The centrifuge is connected to a dryer, and the dryer is suitable for drying the obtained high-purity sodium bicarbonate;

[0018] The chillers are respectively connected to the preparation kettle, the carbonization kettle and the crystallization kettle, and are suitable for adjusting the operating temperature of each device.

[0019] Furthermore, the filtration system includes a 5um filter and a 0.45um filter, the 5um filter is connected to the preparation kettle, the 5um filter is connected to the 0.45um filter, and the 0.45um filter is connected to the carbonization kettle.

[0020] Furthermore, there are two carbonization kettles, which are connected in parallel.

[0021] Furthermore, the water purification tank is connected to a reverse osmosis water purifier, the inlet of the reverse osmosis water purifier is connected to a water tank, and the sewage outlet is connected to a concentrated water pool.

[0022] Furthermore, the dryer is a double-cone dryer.

[0023] The beneficial effects of the utility model are:

[0024] The sodium carbonate purification system of the utility model can reduce energy consumption, improve production efficiency, thereby reducing production costs and bringing economic benefits to the enterprise.

[0025] Secondly, this technology can reduce the emission of waste gas and wastewater, reduce environmental pollution, and contribute to sustainable development and environmental protection.

[0026] In addition, high-purity sodium carbonate can improve product quality, meet the requirements for sodium carbonate purity in different fields, and promote scientific and technological progress and industrial upgrading. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the sodium carbonate purification system of the utility model;

[0029] Among them, 1. reverse osmosis water purifier, 2. water purification tank, 3. supernatant temporary storage tank, 4. preparation kettle, 51. 5um filter, 52. 0.45um filter, 6. carbonization kettle, 7. crystallization kettle, 8. centrifuge, 9. double cone dryer, 10. chiller. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The present application provides a sodium carbonate purification system, which is described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0032] In order to solve the technical problems of low efficiency and high cost in the current sodium carbonate preparation process in the prior art, an embodiment of the present application provides a sodium carbonate purification system, which is described in detail below.

[0033] like Figure 1 As shown, a sodium carbonate purification system comprises

[0034] A water purification tank 2, a supernatant temporary storage tank 3, a vacuum feeder, a preparation kettle 4, a filtration system, at least one carbonization kettle 6, a crystallization kettle 7, a centrifuge 8, a chiller 10 and a dryer;

[0035] The supernatant temporary storage tank 3 is connected to the clean water tank 2 and heats the input clean water to a predetermined temperature;

[0036] The clean water tank 2 is connected to the inlet of the supernatant temporary storage tank 3;

[0037] The supernatant temporary storage tank 3 is connected to the preparation kettle 4 and is suitable for conveying purified water of a predetermined temperature into the preparation kettle 4;

[0038] The vacuum feeder is connected to the preparation kettle 4 and is suitable for adding industrial soda ash into the preparation kettle 4;

[0039] The preparation kettle 4 is connected to the filtering system and the carbonizing kettle 6, and the preparation kettle 4 is suitable for filtering the soda ash suspension and sending it to the carbonizing kettle 6 for carbonization treatment;

[0040] The carbonization kettle 6 is connected to the crystallization tank and is suitable for cooling and crystallizing the carbonized soda ash filtrate;

[0041] The crystallization tank is connected to a centrifuge 8, and the centrifuge 8 is dried to obtain high-purity sodium bicarbonate;

[0042] The centrifuge 8 is connected to a dryer, which is suitable for drying the obtained high-purity sodium bicarbonate;

[0043] The chiller 10 is respectively connected to the preparation kettle 4, the carbonization kettle 6 and the crystallization kettle 7, and is suitable for adjusting the operating temperature of each device.

[0044] Specifically, as an optional implementation in this embodiment, Figure 1 As shown, the filtering system includes a 5um filter 51 and a 0.45um filter 2 , the 5um filter 51 is connected to the preparation kettle 4 , the 5um filter 51 is connected to the 0.45um filter 2 , and the 0.45um filter 52 is connected to the carbonization kettle 6 .

[0045] The outside of the filter cylinder is equipped with a heating jacket, which controls the temperature of the soda ash suspension inside to 35℃-40℃.

[0046] The filter element in the filter adopts a metal titanium rod filter element.

[0047] Specifically, as an optional implementation in this embodiment, Figure 1 As shown, there are two carbonization kettles, which are connected in parallel.

[0048] When the carbonizing kettle is in operation, the soda ash filtrate is stirred in the carbonizing kettle while carbon dioxide is flushed into the carbonizing kettle. Ventilation is stopped when the pressure in the kettle reaches 3 MPa.

[0049] Specifically, as an optional implementation in this embodiment, Figure 1 As shown, the water purification tank 2 is connected to the reverse osmosis water purifier 1, the inlet of the reverse osmosis water purifier 1 is connected to the water tank, and the sewage outlet is connected to the concentrated water pool.

[0050] Specifically, as an optional implementation in this embodiment, the dryer adopts a double-cone dryer 9.

[0051] The obtained high-purity sodium bicarbonate is sent to the double-cone dryer 9 for drying, and the dried and cooled product is crushed in a ball mill to obtain a high-purity sodium carbonate product; the sodium carbonate is processed to generate powdered sodium carbonate and carbon dioxide gas, and the generated carbon dioxide gas can be recycled to the preparation kettle 4 and stored in the air bag.

[0052] CO2 is introduced into the preparation kettle 4 until the pH is less than 9, and the ventilation is stopped, so that the impurity ions Cu2+, Mg2+, etc. in the treated solution increase in solubility as the pH value decreases, and thus remain in the solution.

[0053] The working process of the sodium carbonate purification system is as follows:

[0054] Step 1: Filter the water in the water tank through the reverse osmosis water purifier 1, and send the obtained purified water into the water purification tank 2 for use by the system in the water purification tank 2;

[0055] Step 2: Dissolve, add purified water to the supernatant temporary storage tank 3 and heat and keep warm, add purified water and industrial soda ash to the preparation kettle 4 through the ingredient water inlet pump and the automatic suction machine, keep warm and stir continuously, and wait until it stops dissolving to obtain an industrial soda ash suspension containing insoluble matter;

[0056] Step 3: Filter the suspension through a 5um filter and a 0.45um filter in sequence while it is hot to remove insoluble matter in the industrial soda ash, and obtain a relatively clear industrial soda ash filtrate, i.e., a primary soda ash solution, which is reserved for later use;

[0057] The fourth step is carbonization: the primary soda ash solution is carbonized, and the solution is stirred continuously while maintaining the temperature, and carbon dioxide gas is slowly introduced until the pressure in the kettle reaches 3 MPa, and then the aeration is stopped;

[0058] The fifth step is to crystallize: the purified liquid is stirred, cooled by condensed water, and passed into a centrifuge 8 to be dried to obtain high-purity sodium bicarbonate;

[0059] Condensed water is supplied by the chiller 10 .

[0060] Step 6: Start drying: The obtained high-purity sodium bicarbonate is sent to a double-cone dryer 9 for drying at a temperature of 180-300° C. The dried and cooled product is crushed in a ball mill to obtain a high-purity sodium carbonate product;

[0061] The sodium carbonate purification system of the utility model can reduce energy consumption, improve production efficiency, thereby reducing production costs and bringing economic benefits to enterprises. Secondly, the technology can reduce the emission of waste gas and wastewater, reduce environmental pollution, and contribute to sustainable development and environmental protection. In addition, high-purity sodium carbonate can improve product quality, meet the requirements of sodium carbonate purity in different fields, and promote scientific and technological progress and industrial upgrading.

[0062] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0063] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] 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 the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0065] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0066] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0067] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0068] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sodium carbonate purification system, characterized in that: include A water purification tank, a supernatant storage tank, a vacuum feeder, a preparation kettle, a filtration system, at least one carbonization kettle, a crystallization kettle, a centrifuge, a chiller and a dryer; The supernatant temporary storage tank is connected to the clean water tank and heats the input clean water to a predetermined temperature; The clean water tank is connected to the inlet of the supernatant temporary storage tank; The supernatant temporary storage tank is connected to the preparation kettle and is suitable for conveying purified water at a predetermined temperature into the preparation kettle; The vacuum feeder is connected to the preparation kettle and is suitable for adding industrial soda ash into the preparation kettle; The preparation kettle is connected to the filtering system and the carbonizing kettle, and the preparation kettle is suitable for filtering the soda ash suspension and sending it to the carbonizing kettle for carbonization treatment; The carbonization kettle is connected to the crystallization tank and is suitable for cooling and crystallizing the carbonized soda ash filtrate; The crystallization tank is connected to a centrifuge, and the centrifuge is used to spin dry to obtain high-purity sodium bicarbonate; The centrifuge is connected to a dryer, and the dryer is suitable for drying the obtained high-purity sodium bicarbonate; The chillers are respectively connected to the preparation kettle, the carbonization kettle and the crystallization kettle, and are suitable for adjusting the operating temperature of each device.

2. The sodium carbonate purification system according to claim 1, characterized in that: The filtration system comprises a 5um filter and a 0.45um filter, the 5um filter is connected to the preparation kettle, the 5um filter is connected to the 0.45um filter, and the 0.45um filter is connected to the carbonization kettle.

3. The sodium carbonate purification system according to claim 1, characterized in that: There are two carbonization kettles, which are connected in parallel.

4. The sodium carbonate purification system according to claim 1, characterized in that: The water purification tank is connected to a reverse osmosis water purifier, the inlet of the reverse osmosis water purifier is connected to a water tank, and the sewage outlet is connected to a concentrated water pool.

5. The sodium carbonate purification system according to claim 1, characterized in that: The dryer is a double cone dryer.

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