Production system for producing polyaluminum chloride by using aluminum ash

Abstract

The utility model discloses a production system for producing polyaluminum chloride by utilizing aluminum ash, which comprises a first reaction unit, a second reaction unit and a second filter press, the first reaction unit comprises a first stirring tank and a first filter press, and the first stirring tank is used for stirring and reacting the aluminum ash subjected to denitrification and impurity removal, water and industrial hydrochloric acid; the second reaction unit comprises a second stirring tank, a first metering conveyor and a second metering conveyor, the second stirring tank is used for stirring the aluminum chloride filtrate output by the first filter press, and the first metering conveyor inputs an ammonia nitrogen degradation agent into the aluminum chloride filtrate of the second stirring tank; the second metering conveyor is used for adding calcium aluminate powder into the second stirring tank, so that the aluminum chloride filtrate and the calcium aluminate powder react to form polyaluminum chloride slurry. According to the production system for producing the polyaluminum chloride by utilizing the aluminum ash, the ammonia nitrogen content of the produced polyaluminum chloride can be reduced to reach the national standard, and the application of the aluminum ash in the industrial polyaluminum chloride water purifying agent industry is facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum ash processing, and in particular to a production system for producing polyaluminum chloride using aluminum ash. Background Technology

[0002] A large amount of hazardous waste, aluminum ash, is generated during the production of aluminum profiles through smelting, casting, and electrolytic aluminum. Aluminum ash contains metallic aluminum, aluminum oxide, aluminum nitride, and other impurities.

[0003] Alumina is an important raw material for the production of polyaluminum chloride (PAC) in water purification agents. The water purification agent industry uses aluminum ash to produce PAC. Specific methods include: 1. Reacting aluminum ash directly with industrial hydrochloric acid to produce PAC solution (commonly known as basic aluminum chloride); 2. Reacting aluminum ash with industrial hydrochloric acid to produce aluminum chloride product, and then adding aluminum ash calcium powder in a two-step process to produce PAC; 3. Washing aluminum ash with water to remove some nitrogen, then reacting it with industrial hydrochloric acid to produce aluminum chloride solution, and then producing PAC in a two-step process.

[0004] However, existing methods for producing polyaluminum chloride using aluminum ash result in polyaluminum chloride with high ammonia nitrogen content, which limits the use of aluminum ash in the industrial polyaluminum chloride water purification agent industry. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a production system for producing polyaluminum chloride using aluminum ash, which can reduce the ammonia nitrogen content of the produced polyaluminum chloride to meet national standards, thus facilitating the application of aluminum ash in the industrial polyaluminum chloride water purification agent industry.

[0006] A production system for producing polyaluminum chloride using aluminum ash according to an embodiment of the present invention includes:

[0007] The first reaction unit includes a first stirred tank and a first filter press. The first stirred tank is used to stir and react aluminum ash, water and industrial hydrochloric acid after denitrification and impurity removal. The first filter press is used to filter the solution after stirring and reaction in the first stirred tank and output aluminum chloride filtrate.

[0008] The second reaction unit includes a second stirring tank, a first metering feeder, and a second metering feeder. The second stirring tank is used to stir the aluminum chloride filtrate output from the first filter press. The first metering feeder inputs an ammonia nitrogen degrading agent into the aluminum chloride filtrate in the second stirring tank to decompose the ammonia nitrogen element in the aluminum chloride filtrate. The second metering feeder adds calcium aluminate powder into the aluminum chloride filtrate in the second stirring tank so that the aluminum chloride filtrate and calcium aluminate powder react to form a polyaluminum chloride slurry.

[0009] The second filter press is used to filter the polyaluminum chloride slurry output from the second mixing tank to remove precipitates and output polyaluminum chloride liquid.

[0010] A production system for producing polyaluminum chloride using aluminum ash according to an embodiment of the present invention has at least the following beneficial effects:

[0011] 1. This utility model, by setting up a first reaction unit and a second reaction unit, realizes the two-stage reaction unit to convert aluminum ash after denitrification and impurity removal into high-value-added product polyaluminum chloride, thereby reducing solid waste pollution.

[0012] 2. This utility model combines a first filter press and a second filter press to remove impurities and precipitates in stages, significantly improving the purity of polyaluminum chloride liquid.

[0013] 3. This utility model, by setting up a first metering conveyor and a second metering conveyor, introduces an ammonia nitrogen degrading agent into the aluminum chloride filtrate of the second mixing tank to decompose the ammonia nitrogen element in the aluminum chloride filtrate. The second metering conveyor adds calcium aluminate powder into the aluminum chloride filtrate of the second mixing tank so that the aluminum chloride filtrate and calcium aluminate powder react to form a polyaluminum chloride slurry. The ammonia nitrogen degrading agent is used to decompose the ammonia nitrogen element in the aluminum chloride filtrate, which efficiently decomposes the ammonia nitrogen element in the aluminum chloride filtrate, reduces the generation of harmful by-products, and can reduce the ammonia nitrogen content of the produced polyaluminum chloride to meet national standards. This is beneficial for the application of aluminum ash in the industrial polyaluminum chloride water purification agent industry.

[0014] According to some embodiments of the present invention, the second reaction unit further includes a first steam supplier, which is used to supply steam to the second mixing tank after the second metering feeder feeds calcium aluminate powder into the second mixing tank to heat the mixing environment of the second mixing tank.

[0015] Advantageously, this invention further includes a first steam supply unit in the second reaction unit. The first steam supply unit is used to supply steam to the second mixing tank after the second metering feeder feeds calcium aluminate powder into the second mixing tank to heat the mixing environment of the second mixing tank. Thus, steam heating can accelerate the chemical reaction rate between calcium aluminate powder and aluminum chloride filtrate, shorten the production cycle, and at the same time, optimize the reaction conditions through temperature control to improve the degree of polymerization and stability of polyaluminum chloride slurry.

[0016] According to some embodiments of the present invention, the ammonia nitrogen degradation agent fed by the first metering feeder to the second mixing tank is one or more of hydrogen peroxide, sodium dichloroisocyanurate, and sodium hypochlorite.

[0017] The advantages of this invention are that by setting the ammonia nitrogen degrading agent input from the first metering feeder to the second mixing tank as one or more of hydrogen peroxide, sodium dichloroisocyanurate, and sodium hypochlorite, it can be understood that hydrogen peroxide, sodium dichloroisocyanurate, or sodium hypochlorite, as ammonia nitrogen degrading agents, have high-efficiency oxidizing properties and can specifically remove ammonia nitrogen pollutants. At the same time, the selection of ammonia nitrogen degrading agents is flexible, and the formula can be adjusted according to the characteristics of the raw materials to meet the needs of different working conditions.

[0018] According to some embodiments of the present invention, the first reaction unit further includes a second steam supply, which is used to input steam into the first mixing tank to heat the mixing environment of the first mixing tank.

[0019] The advantages of this invention are that by including a second steam supply in the first reaction unit, the second steam supply is used to input steam into the first mixing tank to heat the mixing environment of the first mixing tank. Thus, steam heating can promote the reaction activity between aluminum ash and hydrochloric acid, accelerate the dissolution efficiency of metallic aluminum and some aluminum chloride in the aluminum ash, and at the same time, temperature controllability avoids violent boiling or equipment damage caused by violent reaction, thereby improving processing safety.

[0020] According to some embodiments of the present invention, the first reaction unit further includes a third metering feeder, which is used to meter water into the first mixing tank.

[0021] The advantages of this invention are that by including a third metering feeder in the first reaction unit, which is used to meter water into the first mixing tank, the water input can be precisely controlled to ensure the optimal molar ratio of aluminum ash to hydrochloric acid and avoid resource waste. On the other hand, automated metering reduces manual intervention and improves the standardization of the production process.

[0022] According to some embodiments of the present invention, the first reaction unit further includes a fourth metering feeder, which is used to meter and feed aluminum ash into the first mixing tank.

[0023] The advantages of this invention are that by including a fourth metering feeder in the first reaction unit, the fourth metering feeder is used to meter and input aluminum ash into the first mixing tank. This quantitative feeding of aluminum ash avoids overloading of the reaction system and prevents incomplete local reactions or agglomeration. At the same time, the continuous feeding design is adapted to the needs of large-scale production and improves the system's processing capacity.

[0024] According to some embodiments of the present invention, the fourth metering feeder feeds a fixed amount of aluminum ash into the first mixing tank at multiple intervals.

[0025] The advantages of this invention are: by having the fourth metering feeder feed a fixed amount of aluminum ash into the first mixing tank at multiple intervals, the problem of concentrated exothermic reaction is alleviated, the system temperature is maintained stably, and the uneven mixing caused by aluminum ash accumulation is reduced, thereby improving the completeness of the reaction.

[0026] According to some embodiments of the present invention, the first reaction unit further includes a fifth metering feeder, which is used to meter and feed industrial hydrochloric acid into the first mixing tank.

[0027] The advantages of this invention are that by including a fifth metering feeder in the first reaction unit, which is used to meter and feed industrial hydrochloric acid into the first mixing tank, the amount of industrial hydrochloric acid added can be quantitatively controlled and the acidity of the reaction system can be precisely adjusted to optimize the aluminum ash dissolution efficiency. On the other hand, excessive industrial hydrochloric acid residue can be avoided, reducing the cost of subsequent neutralization treatment.

[0028] According to some embodiments of the present invention, the fifth metering feeder feeds a fixed amount of industrial hydrochloric acid into the aluminum ash and aqueous solution in the first mixing tank at multiple intervals.

[0029] The advantages of this invention are: by having the fifth metering feeder feed a fixed amount of industrial hydrochloric acid into the aluminum ash and aqueous solution in the first mixing tank in multiple intervals, the heat of reaction can be gradually released by adding industrial hydrochloric acid in multiple stages, preventing the safety hazards caused by a sudden rise in temperature. At the same time, it is convenient to dynamically adjust the acid concentration gradient, promote the layer-by-layer dissolution of aluminum ash, and improve the utilization rate of raw materials.

[0030] According to some embodiments of the present invention, the first reaction unit further includes a fourth metering feeder, a fifth metering feeder, and a sixth metering feeder, wherein the fourth metering feeder, the fifth metering feeder, and the sixth metering feeder sequentially meter water, aluminum ash, and industrial hydrochloric acid into the first mixing tank.

[0031] The advantages of this invention are: by further including a fourth metering feeder, a fifth metering feeder, and a sixth metering feeder in the first reaction unit, the fourth, fifth, and sixth metering feeders sequentially meter water, aluminum ash, and industrial hydrochloric acid into the first mixing tank, thereby achieving stepwise metering and addition of water, aluminum ash, and hydrochloric acid, realizing fully automated control of the entire process, and reducing human error. In addition, by designing the sequential addition of water, aluminum ash, and industrial hydrochloric acid, the reaction start-up conditions are optimized, avoiding direct contact that could lead to violent reactions. At the same time, multi-level metering coordination ensures accurate raw material ratios and improves batch-to-batch product consistency.

[0032] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a production system for producing polyaluminum chloride using aluminum ash, according to an embodiment of the present invention.

[0035] Figure 2 for Figure 1 The diagram shows the structure of the first reaction unit;

[0036] Figure 3 for Figure 2 The diagram shown is a structural schematic of the first mixing tank;

[0037] Figure 4 for Figure 1 The diagram shows the structure of the second reaction unit.

[0038] Reference numerals: 100-First mixing tank, 110-First filter press, 120-Second mixing tank, 130-First metering conveyor, 140-Second metering conveyor, 150-Second filter press, 160-First steam supplier, 170-Second steam supplier, 180-Third metering conveyor, 190-Fourth metering conveyor, 200-Fifth metering conveyor. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The following is in conjunction with the appendix Figure 1-4 This invention describes a production system for producing polyaluminum chloride using aluminum ash, according to an embodiment of the present invention.

[0044] Reference Figure 1 The present invention aims to provide an embodiment of a production system for producing polyaluminum chloride using aluminum ash.

[0045] In this embodiment, a production system for producing polyaluminum chloride using aluminum ash mainly includes a first reaction unit, a second reaction unit, and a second filter press 150.

[0046] Reference Figure 2 and Figure 3 The first reaction unit includes a first stirred tank 100 and a first filter press 110. The first stirred tank 100 is used to stir and react aluminum ash, water and industrial hydrochloric acid after denitrification and impurity removal. The first filter press 110 is used to filter the solution after stirring and reaction in the first stirred tank 100 and output aluminum chloride filtrate.

[0047] In some specific embodiments, the first reaction unit further includes a second steam supply 170, which is used to input steam into the first stirring tank 100 to heat the stirring environment of the first stirring tank 100. Thus, steam heating can promote the reaction activity between aluminum ash and hydrochloric acid, accelerate the dissolution efficiency of metallic aluminum and some aluminum chloride in aluminum ash, and at the same time, temperature controllability avoids violent boiling or equipment damage caused by violent reaction, thereby improving processing safety.

[0048] In some specific embodiments, the first reaction unit further includes a third metering feeder 180, which is used to meter water into the first mixing tank 100. This allows for precise control of water input, ensuring the optimal molar ratio of aluminum ash to hydrochloric acid and avoiding resource waste. Furthermore, automated metering reduces manual intervention and improves the standardization of the production process.

[0049] In some specific embodiments, the first reaction unit further includes a fourth metering feeder 190, which is used to meterly feed aluminum ash into the first mixing tank 100. This quantitative feeding of aluminum ash avoids overloading of the reaction system and prevents incomplete local reactions or agglomeration. At the same time, the continuous feeding design adapts to the needs of large-scale production and improves the system's processing capacity.

[0050] Furthermore, the fourth metering feeder 190 feeds a fixed amount of aluminum ash into the first mixing tank 100 at multiple intervals. This multi-interval feeding of aluminum ash alleviates the problem of concentrated exothermic reaction, maintains stable system temperature, and at the same time reduces uneven mixing caused by aluminum ash accumulation, thereby improving reaction completeness.

[0051] In some specific embodiments, the first reaction unit further includes a fifth metering feeder 200, which is used to meterly input industrial hydrochloric acid into the first mixing tank 100. This allows for quantitative control of the amount of industrial hydrochloric acid added, precise adjustment of the acidity of the reaction system, and optimization of the aluminum ash dissolution efficiency. On the other hand, it avoids excessive industrial hydrochloric acid residue and reduces the cost of subsequent neutralization treatment.

[0052] Furthermore, the fifth metering feeder 200 feeds a fixed amount of industrial hydrochloric acid into the aluminum ash and aqueous solution in the first mixing tank 100 in multiple intervals. Thus, the addition of industrial hydrochloric acid in multiple intervals can gradually release the heat of reaction, prevent the temperature from rising suddenly and causing safety hazards. At the same time, it is convenient to dynamically adjust the acid concentration gradient, promote the dissolution of aluminum ash layer by layer, and improve the utilization rate of raw materials.

[0053] In some specific embodiments, the first reaction unit further includes a fourth metering feeder 190, a fifth metering feeder 200, and a sixth metering feeder, which sequentially meter water, aluminum ash, and industrial hydrochloric acid into the first mixing tank 100.

[0054] Understandably, the step-by-step metering and addition of water, aluminum ash, and hydrochloric acid enables fully automated control of the entire process, reducing human error. In addition, by designing the sequential addition of water, aluminum ash, and industrial hydrochloric acid, the reaction start-up conditions are optimized, avoiding direct contact that could trigger a violent reaction. At the same time, multi-level metering coordination ensures accurate raw material ratios and improves batch-to-batch product consistency.

[0055] Reference Figure 4 The second reaction unit includes a second stirring tank 120, a first metering feeder 130, and a second metering feeder 140. The second stirring tank 120 is used to stir the aluminum chloride filtrate output from the first filter press 110. The first metering feeder 130 inputs an ammonia nitrogen degrading agent into the aluminum chloride filtrate in the second stirring tank 120 to decompose the ammonia nitrogen element in the aluminum chloride filtrate. The second metering feeder 140 adds calcium aluminate powder into the aluminum chloride filtrate in the second stirring tank 120 so that the aluminum chloride filtrate and calcium aluminate powder react to form a polyaluminum chloride slurry.

[0056] This embodiment uses a first metering feeder 130 and a second metering feeder 140. The first metering feeder 130 introduces an ammonia nitrogen degrading agent into the aluminum chloride filtrate in the second mixing tank 120 to decompose the ammonia nitrogen element in the aluminum chloride filtrate. The second metering feeder 140 adds calcium aluminate powder into the aluminum chloride filtrate in the second mixing tank 120 so that the aluminum chloride filtrate and calcium aluminate powder react to form a polyaluminum chloride slurry. The ammonia nitrogen degrading agent is used to decompose the ammonia nitrogen element in the aluminum chloride filtrate, which efficiently decomposes the ammonia nitrogen element in the aluminum chloride filtrate, reduces the generation of harmful by-products, and can reduce the ammonia nitrogen content of the produced polyaluminum chloride, which is beneficial to the application of aluminum ash in the industrial polyaluminum chloride water purification agent industry.

[0057] This embodiment achieves the conversion of aluminum ash into high-value-added product polyaluminum chloride through a two-stage reaction unit by setting up a first reaction unit and a second reaction unit, thereby reducing solid waste pollution.

[0058] In some specific embodiments, the second reaction unit further includes a first steam supplier 160, which is used to supply steam to the second mixing tank 120 to heat the mixing environment of the second mixing tank 120 after the second metering feeder 140 feeds calcium aluminate powder into the second mixing tank 120.

[0059] Understandably, steam heating can accelerate the chemical reaction rate between calcium aluminate powder and aluminum chloride filtrate, shorten the production cycle, and at the same time, optimize reaction conditions through temperature control to improve the degree of polymerization and stability of polyaluminum chloride slurry.

[0060] In some specific embodiments, the ammonia nitrogen degrading agent fed by the first metering feeder 130 to the second mixing tank 120 is one or more of hydrogen peroxide, sodium dichloroisocyanurate, and sodium hypochlorite.

[0061] It is understandable that hydrogen peroxide, sodium dichloroisocyanurate, or sodium hypochlorite, as ammonia nitrogen degrading agents, have high oxidizing properties and can specifically remove ammonia nitrogen pollutants. At the same time, the choice of ammonia nitrogen degrading agents is flexible, and the formula can be adjusted according to the characteristics of the raw materials to meet the needs of different working conditions.

[0062] The second filter press 150 is used to filter the polyaluminum chloride slurry output from the second mixing tank 120 to remove precipitates and output polyaluminum chloride liquid.

[0063] In this embodiment, by combining the first filter press 110 and the second filter press 150, impurities and precipitates are removed in stages, significantly improving the purity of polyaluminum chloride liquid.

[0064] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0066] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0067] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0068] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0069] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A production system for producing polyaluminum chloride using aluminum ash, characterized in that, include: The first reaction unit includes a first stirred tank (100) and a first filter press (110). The first stirred tank (100) is used to stir and react aluminum ash, water and industrial hydrochloric acid after denitrification and impurity removal. The first filter press (110) is used to filter the solution after stirring and reaction in the first stirred tank (100) and output aluminum chloride filtrate. The second reaction unit includes a second stirring tank (120), a first metering feeder (130), and a second metering feeder (140). The second stirring tank (120) is used to stir the aluminum chloride filtrate output from the first filter press (110). The first metering feeder (130) inputs an ammonia nitrogen degrading agent into the aluminum chloride filtrate of the second stirring tank (120) to decompose the ammonia nitrogen element in the aluminum chloride filtrate. The second metering feeder (140) adds calcium aluminate powder into the aluminum chloride filtrate of the second stirring tank (120) so that the aluminum chloride filtrate and calcium aluminate powder react to form a polyaluminum chloride slurry. The second filter press (150) is used to filter the polyaluminum chloride slurry output from the second mixing tank (120) to remove precipitates and output polyaluminum chloride liquid.

2. The production system for producing polyaluminum chloride using aluminum ash according to claim 1, characterized in that, The second reaction unit further includes a first steam supply (160), which is used to supply steam to the second mixing tank (120) to heat the mixing environment of the second mixing tank (120) after the second metering feeder (140) feeds calcium aluminate powder into the second mixing tank (120).

3. The production system for producing polyaluminum chloride using aluminum ash according to claim 1, characterized in that, The ammonia nitrogen degradation agent fed by the first metering feeder (130) to the second mixing tank (120) is one or more of hydrogen peroxide, sodium dichloroisocyanurate, and sodium hypochlorite.

4. The production system for producing polyaluminum chloride using aluminum ash according to claim 1, characterized in that, The first reaction unit further includes a second steam supply (170) for supplying steam to the first stirred tank (100) to heat the stirring environment of the first stirred tank (100).

5. A production system for producing polyaluminum chloride using aluminum ash according to claim 1, characterized in that, The first reaction unit also includes a third metering feeder (180) for metering water into the first mixing tank (100).

6. A production system for producing polyaluminum chloride using aluminum ash according to claim 1, characterized in that, The first reaction unit further includes a fourth metering feeder (190) for metering aluminum ash into the first mixing tank (100).

7. A production system for producing polyaluminum chloride using aluminum ash according to claim 6, characterized in that, The fourth metering feeder (190) feeds a fixed amount of aluminum ash into the first mixing tank (100) at multiple intervals.

8. A production system for producing polyaluminum chloride using aluminum ash according to claim 1, characterized in that, The first reaction unit also includes a fifth metering feeder (200) for metering industrial hydrochloric acid into the first mixing tank (100).

9. A production system for producing polyaluminum chloride using aluminum ash according to claim 8, characterized in that, The fifth metering feeder (200) feeds a fixed amount of industrial hydrochloric acid into the aluminum ash and aqueous solution in the first mixing tank (100) at multiple intervals.

10. A production system for producing polyaluminum chloride using aluminum ash according to claim 1, characterized in that, The first reaction unit also includes a fourth metering feeder (190), a fifth metering feeder (200) and a sixth metering feeder, which sequentially meter water, aluminum ash and industrial hydrochloric acid into the first mixing tank (100).

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