Process for producing water purifying agent by comprehensive utilization of red mud

Abstract

The invention discloses a process for producing a water purifying agent by comprehensive utilization of red mud, which comprises a mixing tank, the output end of the mixing tank is connected with the input end of a batching tank through a pipeline, the output end of the batching tank is connected with the input end of a polymerization reaction kettle through a pipeline, and the output end of the polymerization reaction kettle is connected with the input end of a plate-and-frame filter press through a pipeline. The liquid outlet end of the plate-and-frame filter press is connected with the input end of the liquid PAC tank through a pipeline, the output end of the liquid PAC tank is connected with the input end of the mixing and curing tank through a pipeline, and the input end of the mixing and curing tank is connected with the output end of the activated silicic acid preparation tank through a pipeline. A series of structures are arranged, the water purifying agent is produced through the procedures of dilution, primary mixing, secondary mixing, polymerization reaction, filtration, activated silicic acid preparation, filtrate solidification, flash drying and packaging, the process is simple, the process conditions and the preparation proportion are accurately controlled, the water purifying effect is good, the adsorbability is efficient, the cost is low, economy and environmental protection are achieved, and the process waste discharge amount is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water purifying agent production, and specifically to a process for comprehensively utilizing red mud to produce water purifying agent. Background Technique

[0002] A water purifying agent is a chemical agent that can react with other impurities when added to water, mainly used for purifying water bodies. The water purifying agent has various functions in sewage treatment, including coagulation, redox, adsorption, disinfection, etc. When using a water purifying agent for sewage treatment, it is necessary to select a suitable water purifying agent according to the specific situation of the sewage, and pay attention to the usage method and dosage to avoid secondary pollution to the environment. At the same time, it is ensured that the water purifying agent will not have a negative impact on the environment and human health. The production process of the water purifying agent mainly includes raw material preparation, formula preparation, dissolution and reaction, filtration and drying, and packaging.

[0003] At present, a large amount of waste residue and waste gas are generated in the process of the water purifying agent, with a large discharge amount and serious pollution. In addition, the chemical water purifying agent produced has poor adsorption performance. During the process, deviations in the control of the process conditions for producing the water purifying agent and the configuration of the production components of the water purifying agent result in poor quality of the water purifying agent finished product and high production cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a process for comprehensively utilizing red mud to produce water purifying agent to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A process for comprehensively utilizing red mud to produce water purifying agent, including a mixing tank, the output end of the mixing tank is connected to the input end of a batching tank through a pipeline, the output end of the batching tank is connected to the input end of a polymerization reactor through a pipeline, the output end of the polymerization reactor is connected to the input end of a plate and frame filter press through a pipeline, the liquid outlet end of the plate and frame filter press is connected to the input end of a liquid PAC tank through a pipeline, the output end of the liquid PAC tank is connected to the input end of a mixing and solidifying tank through a pipeline, the input end of the mixing and solidifying tank is connected to the output end of an activated silicic acid preparation tank through a pipeline, the input end of the activated silicic acid preparation tank is connected to a preparation mechanism through a pipeline, the output end of the mixing and solidifying tank is connected to the input end of a flash dryer through a pipeline; the tail gas outlets of the polymerization reactor and the flash dryer are connected to a tail gas washing device through a pipeline; The water purifying agent process includes dilution, primary mixing, secondary mixing, polymerization reaction, filtration, activated silicic acid preparation, filtrate solidification, flash drying, and packaging.

[0006] Preferably, the preparation mechanism includes a first preparation tank and a second preparation tank. The output ends of the first preparation tank and the second preparation tank are connected to the input end of the activated silicic acid preparation tank through a pipeline. The first preparation tank is used for diluting and preparing hydrochloric acid, and the second preparation tank is used for diluting and preparing sodium silicate.

[0007] Preferably, the tail gas washing equipment includes the tail gas washing equipment for the polymerization reaction section and the tail gas washing equipment for the flash drying. The tail gas outlet of the polymerization reactor is connected to the inlet of the tail gas washing equipment for the polymerization reaction section through a pipeline, and the tail gas outlet of the flash dryer is connected to the inlet of the tail gas washing equipment for the flash drying through a pipeline.

[0008] Preferably, the specific steps of the water purifying agent process are as follows: S1. Dilution: Dilute hydrochloric acid with a content of 30% to a content of 20%, and dilute sulfuric acid to a content of 30%. S2. Primary mixing: The diluted hydrochloric acid and sulfuric acid are mixed in a mixing tank in a ratio of 1:1. S3. Secondary mixing: The mixture of hydrochloric acid and sulfuric acid after mixing is transported to a batching tank, and 0.6 tons of red mud is added per ton of the mixed acid. S4. Polymerization reaction: The mixed liquid after secondary mixing is added to a polymerization reactor, and the mixed liquid in the polymerization reactor is heated by passing steam for reaction. During the reaction process, sodium chlorate solution is continuously and stably added for oxidation reaction. S5. Filtration: The liquid after the polymerization reaction is subjected to solid-liquid separation by a plate and frame filter press. The filtrate of the water purifying agent produced by the solid-liquid separation of the plate and frame filter press is transported to a liquid PAC tank for temporary storage, and the filter residue produced by the solid-liquid separation of the plate and frame filter press is washed and used for preparing building materials. S6. Preparation of activated silicic acid: Dilute hydrochloric acid to a content of 15% in a first preparation tank, and dilute sodium silicate to a content of 20% in a second preparation tank; transport the diluted hydrochloric acid to an activated silicic acid preparation tank, start the stirrer to rotate rapidly, and then slowly add the diluted sodium silicate solution to the activated silicic acid preparation tank. The preparation of the activated silicic acid liquid is completed. S7. Filtrate solidification: Transport the filtrate of the water purifying agent after filtration in the liquid PAC tank to a mixing and solidifying tank and start stirring, and then slowly add the prepared activated silicic acid liquid. The mixing ratio is 65% water purifying agent filtrate: 35% activated silicic acid liquid. After mixing and solidifying, a semi-solid polyaluminum ferric silicate chloride sulfate water purifying agent is obtained. S8. Flash drying: The semi-solid polyaluminum ferric silicate chloride sulfate water purifying agent after solidification is transported to a flash dryer for drying through a conveying device. S9. Packaging: Package and sell the dried solid polyaluminum ferric silicate chloride sulfate water purifying agent.

[0009] Preferably, the conditions for the polymerization reaction are as follows: The steam introduced into the polymerization reactor is 0.5 MPa, the heating reaction time of the polymerization reactor is 5 hours, and the pressure of the polymerization reactor is maintained at 0.3 - 0.5 Mpa during the reaction process.

[0010] Preferably, the temperature of the filtrate of the water purifying agent produced by solid-liquid separation in the plate-and-frame filter press and temporarily stored in the liquid PAC tank is 60-65 °C.

[0011] Preferably, during the preparation of the activated silicic acid, the stirring speed is 120 rpm, and the stability retention time of the activated silicic acid liquid prepared by adding the diluted sodium silicate solution into the activated silicic acid preparation tank is 5 hours.

[0012] Preferably, during the solidification of the filtrate, the stirring speed inside the mixing and solidification tank is 120 rpm, and the stability of the liquid polysil sulfur chlorinated aluminum iron after mixing the water purifying agent filtrate and the activated silicic acid liquid is maintained for 24 hours, and the solidification is completed in 24-36 hours.

[0013] Preferably, both the tail gas washing equipment for the polymerization reaction section and the tail gas washing equipment for the flash drying are composed of a washing tower and a water circulation tank.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the process of comprehensively utilizing red mud to produce water purifying agent, the water purifying agent produced through the processes of dilution, primary mixing, secondary mixing, polymerization reaction, filtration, preparation of activated silicic acid, solidification of filtrate, flash drying and packaging has a simple production process, precise control of process conditions and configuration ratios, good water purification effect. Utilizing the strong adsorption and ion exchange properties of red mud, red mud is mixed with hydrochloric acid and sulfuric acid and undergoes a polymerization reaction by heating with sodium chlorate, which is applicable to the adsorption, degradation and separation of various ions in wastewater. The water purifying agent has high adsorption efficiency, low red mud cost, and the production of water purifying agent is more economical and environmentally friendly, with a wide range of applications.

[0015] 2. In the process of comprehensively utilizing red mud to produce water purifying agent, solid-liquid separation after the polymerization reaction is carried out by a plate-and-frame filter press in the water purifying agent process, with a high solid recovery rate and small loss. The filter residue is washed and used to prepare building materials, and the tail gas generated in the water purifying agent production process is washed and treated before discharge, reducing the waste discharge of the process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a process flow diagram of the production of the water purifying agent in the present invention.

[0017] In the figure: 1. mixing tank; 2. batching tank; 3. polymerization reaction kettle; 4. plate-and-frame filter press; 5. liquid PAC tank; 6. mixing and solidification tank; 7. flash dryer; 8. activated silicic acid preparation tank; 9. first preparation tank; 10. second preparation tank; 11. tail gas washing equipment for the polymerization reaction section; 12. tail gas washing equipment for the flash drying. DETAILED DESCRIPTION OF THE INVENTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0020] As Figure 1 and Figure 2 shown, the process for comprehensively utilizing red mud to produce water purifying agent in this embodiment includes a mixing tank 1. The output end of the mixing tank 1 is connected to the input end of a batching tank 2 through a pipeline. The output end of the batching tank 2 is connected to the input end of a polymerization reactor 3 through a pipeline. The output end of the polymerization reactor 3 is connected to the input end of a plate and frame filter press 4 through a pipeline. The liquid outlet end of the plate and frame filter press 4 is connected to the input end of a liquid PAC tank 5 through a pipeline. The output end of the liquid PAC tank 5 is connected to the input end of a mixing and solidifying tank 6 through a pipeline. The input end of the mixing and solidifying tank 6 is connected to the output end of an activated silicic acid preparation tank 8 through a pipeline. The input end of the activated silicic acid preparation tank 8 is connected to a preparation mechanism through a pipeline. The output end of the mixing and solidifying tank 6 is connected to the input end of a flash dryer 7 through a pipeline. The tail gas outlets of the polymerization reactor 3 and the flash dryer 7 are connected to a tail gas scrubbing device through a pipeline; The water purifying agent process includes dilution, primary mixing, secondary mixing, polymerization reaction, filtration, activated silicic acid preparation, filtrate solidification, flash drying, and packaging. The water purifying agent production process is simple, the process conditions and configuration ratios are accurately controlled, and the water purification effect is good.

[0021] Specifically, the preparation mechanism includes a first preparation tank 9 and a second preparation tank 10. The output ends of the first preparation tank 9 and the second preparation tank 10 are connected to the input end of the activated silicic acid preparation tank 8 through a pipeline. The first preparation tank 9 is used for diluting and preparing hydrochloric acid, and the second preparation tank 10 is used for diluting and preparing sodium silicate, which is convenient for dilution and preparation.

[0022] Further, the tail gas scrubbing equipment includes the tail gas scrubbing equipment 11 for the polymerization reaction section and the tail gas scrubbing equipment 12 for the flash drying tail gas. The tail gas outlet of the polymerization reactor 3 is connected to the inlet of the tail gas scrubbing equipment 11 for the polymerization reaction section through a pipeline, and the tail gas outlet of the flash dryer 7 is connected to the inlet of the tail gas scrubbing equipment 12 for the flash drying tail gas through a pipeline, and the tail gas is scrubbed, purified and discharged.

[0023] Further, the specific steps of the water purifying agent process are as follows: S1. Dilution: Dilute the hydrochloric acid with a content of 30% to a content of 20%, and dilute the sulfuric acid to a content of 30%. S2. Primary mixing: The diluted hydrochloric acid and sulfuric acid are mixed in the mixing tank 1 according to a ratio of 1:1. S3. Secondary mixing: The mixture of hydrochloric acid and sulfuric acid after mixing is transported into the batching tank 2, and 0.6 tons of red mud is added per ton of the mixed acid. S4. Polymerization reaction: The mixed liquid after secondary mixing is added to the polymerization reactor 3, and steam is introduced into the mixed liquid in the polymerization reactor 3 for heating reaction. During the reaction process, sodium chlorate solution is continuously and stably added for oxidation reaction. S5. Filtration: The liquid after the polymerization reaction is subjected to solid-liquid separation by a plate and frame filter press 4. The filtrate of the water purifying agent generated by the solid-liquid separation of the plate and frame filter press 4 is transported to the liquid PAC tank 5 for temporary storage, and the filter residue generated by the solid-liquid separation of the plate and frame filter press 4 is washed and used for preparing building materials. S6. Preparation of activated silicic acid: Dilute hydrochloric acid to a content of 15% in the first preparation tank 9, and dilute sodium silicate to a content of 20% in the second preparation tank 10; transport the diluted hydrochloric acid to the activated silicic acid preparation tank 8, start the stirrer to rotate rapidly, and then slowly add the diluted sodium silicate solution to the activated silicic acid preparation tank 8, and the preparation of the activated silicic acid liquid is completed. S7. Filtrate solidification: The filtrate of the water purifying agent after filtration in the liquid PAC tank 5 is transported into the mixing and solidification tank 6 and the stirrer is started, and then the prepared activated silicic acid liquid is slowly added, and the mixing ratio is 65% water purifying agent filtrate: 35% activated silicic acid liquid. After mixing, solidification is carried out to obtain a semi-solid polyaluminum ferric silicate chloride sulfide water purifying agent. S8. Flash drying: The semi-solid polyaluminum ferric silicate chloride sulfide water purifying agent after solidification is transported to the flash dryer 7 for drying through a conveying device. S9. Packaging: The dried solid polyaluminum ferric silicate chloride sulfide water purifying agent is packaged and sold externally.

[0024] Further, the conditions for the polymerization reaction are as follows: The steam introduced into the polymerization reactor 3 is 0.5 MPa, the heating reaction time of the polymerization reactor 3 is 5 hours, and the pressure in the polymerization reactor 3 is maintained at 0.3 - 0.5 Mpa during the reaction process.

[0025] Further, the temperature of the filtrate of the water purification agent produced by the plate and frame filter press 4 during temporary storage in the liquid PAC tank 5 is 60 - 65°C.

[0026] Further, during the preparation of activated silicic acid, the stirring speed is 120 rpm. The stability retention time of the activated silicic acid liquid prepared by adding the diluted sodium silicate solution into the activated silicic acid preparation tank 8 is 5 hours.

[0027] Further, during the filtrate solidification process, the internal stirring speed of the mixing and solidification tank 6 is 120 rpm. The stability of the liquid polysil sulfur chloroaluminum ferric after mixing the water purification agent filtrate and the activated silicic acid liquid is maintained for 24 hours, and solidification is completed in 24 - 36 hours.

[0028] Furthermore, both the tail gas washing equipment 11 in the polymerization reaction section and the flash drying tail gas washing equipment 12 are composed of a washing tower and a water circulation tank. The washing unit of the washing tower is connected to the water circulation tank. The wastewater generated by the washing tower is purified and then returned to the water circulation tank, and the water circulation tank supplies water to the washing tower in a cycle.

[0029] The usage method of this embodiment is as follows: First, dilute hydrochloric acid with a content of 30% to 20%, and dilute sulfuric acid to 30%. The diluted hydrochloric acid and sulfuric acid are mixed in the mixing tank 1 in a ratio of 1:1. The mixture of hydrochloric acid and sulfuric acid after mixing is transported into the batching tank 2. 0.6 tons of red mud is added per ton of the mixed acid. The mixed liquid after secondary mixing is added to the polymerization reactor 3. Steam at 0.5 MPa is introduced into the mixed liquid in the polymerization reactor 3 for heating reaction for 5 hours. During the reaction process, sodium chlorate solution is continuously and stably added for oxidation reaction. The pressure in the polymerization reactor 3 is maintained at 0.3 - 0.5 Mpa during the reaction process. The tail gas produced during the polymerization reaction process is transported to the tail gas washing equipment 11 in the polymerization reaction section for washing and purification and then discharged. The liquid after the polymerization reaction is subjected to solid-liquid separation by the plate and frame filter press 4. The filtrate of the water purifying agent produced by the solid-liquid separation of the plate and frame filter press 4 is transported to the liquid PAC tank 5 for temporary storage. The temperature temporarily stored in the liquid PAC tank 5 is 60 - 65 °C. The filter residue produced by the solid-liquid separation of the plate and frame filter press 4 is washed and then used to prepare building materials. Dilute hydrochloric acid to 15% content in the first configuration tank 9, and dilute sodium silicate to 20% content in the second configuration tank 10; transport the diluted hydrochloric acid into the activated silicic acid configuration tank 8, start the stirring and rotate it quickly, with a stirring speed of 120 rpm, and then slowly add the diluted sodium silicate solution into the activated silicic acid configuration tank 8. The stability retention time of the activated silicic acid liquid configured by adding the diluted sodium silicate solution in the activated silicic acid configuration tank 8 is 5 hours. After the preparation of the activated silicic acid liquid is completed, transport the filtrate of the water purifying agent that has been filtered in the liquid PAC tank 5 into the mixing and solidifying tank 6 and start the stirring, with a stirring speed of 120 rpm, and then slowly add the prepared activated silicic acid liquid. The configuration ratio is 65% water purifying agent filtrate: 35% activated silicic acid liquid. The stability of the liquid polyaluminum ferric silicate sulfate chloride after mixing the water purifying agent filtrate and the activated silicic acid liquid is maintained for 24 hours. Curing is completed after 24 hours to 36 hours to obtain a semi-solid polyaluminum ferric silicate sulfate chloride water purifying agent. The semi-solid polyaluminum ferric silicate sulfate chloride water purifying agent after curing is transported to the flash dryer 7 for drying through a conveying device. The tail gas generated by flash drying is transported to the flash drying tail gas washing equipment 12 for washing and purification and then discharged. Finally, the dried solid polyaluminum ferric silicate sulfate chloride water purifying agent is packaged and sold externally.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A process for producing a water purifier by comprehensive utilization of red mud, comprising a mixing tank (1), characterized in that: The output end of the mixing tank (1) is connected to the input end of the batching tank (2) through a pipeline, the output end of the batching tank (2) is connected to the input end of the polymerization reactor (3) through a pipeline, the output end of the polymerization reactor (3) is connected to the input end of the plate-frame filter press (4) through a pipeline, the liquid outlet end of the plate-frame filter press (4) is connected to the input end of the liquid PAC tank (5) through a pipeline, the output end of the liquid PAC tank (5) is connected to the input end of the mixing and solidification tank (6) through a pipeline, the input end of the mixing and solidification tank (6) is connected to the output end of the activated silica configuration tank (8) through a pipeline, the input end of the activated silica configuration tank (8) is connected to the configuration mechanism through a pipeline, the output end of the mixing and solidification tank (6) is connected to the input end of the flash dryer (7) through a pipeline, and the tail gas outlets of the polymerization reactor (3) and the flash dryer (7) are connected to the tail gas scrubbing equipment through a pipeline; The water purifier process comprises dilution, primary mixing, secondary mixing, polymerization reaction, filtration, activated silicic acid preparation, filtrate solidification, flash drying and packaging.

2. The process for producing water purifier by comprehensive utilization of red mud according to claim 1, characterized in that: The preparation mechanism comprises a first preparation tank (9) and a second preparation tank (10), wherein the output ends of the first preparation tank (9) and the second preparation tank (10) are connected to the input end of the activated silicate preparation tank (8) via a pipeline, the first preparation tank (9) is used for diluting hydrochloric acid, and the second preparation tank (10) is used for diluting sodium silicate.

3. The process for producing water purifier by comprehensive utilization of red mud according to claim 1, characterized in that: The tail gas washing equipment comprises a polymerization reaction section tail gas washing equipment (11) and a flash drying tail gas washing equipment (12); the tail gas outlet of the polymerization reactor (3) is connected to the air inlet of the polymerization reaction section tail gas washing equipment (11) through a pipeline, and the tail gas outlet of the flash drying machine (7) is connected to the air inlet of the flash drying tail gas washing equipment (12) through a pipeline.

4. The process for producing water purifier by comprehensive utilization of red mud according to claim 1, characterized in that: The specific steps of the water purification agent process are as follows: S1. Dilution: dilute 30% hydrochloric acid to 20% and dilute sulfuric acid to 30%; S2, primary mixing: the diluted hydrochloric acid and sulfuric acid are mixed in a mixing tank (1) in a ratio of 1:1; S3, secondary mixing: the mixed hydrochloric acid and sulfuric acid mixture is transported to the batching tank (2), and 0.6 tons of red mud is added for every ton of mixed acid; S4, polymerization reaction: the mixed solution after the secondary mixing is added to the polymerization reaction kettle (3), steam is introduced into the mixed solution in the polymerization reaction kettle (3) for heating reaction, and sodium chlorate solution is continuously and stably added during the reaction for oxidation reaction; S5, filtration: the liquid after the polymerization reaction is completed is separated into solid and liquid by a plate and frame filter press (4), the water purification agent filtrate produced by the solid-liquid separation of the plate and frame filter press (4) is transported to a liquid PAC tank (5) for temporary storage, and the filter residue produced by the solid-liquid separation of the plate and frame filter press (4) is washed and prepared for use as a building material; S6, preparation of activated silicate: dilute hydrochloric acid to 15% in preparation tank No. 1 (9), and dilute sodium silicate to 20% in preparation tank No. 2 (10); transport the diluted hydrochloric acid to the activated silicate preparation tank (8), start stirring and rotate rapidly, and then slowly add the diluted sodium silicate solution to the activated silicate preparation tank (8), and the preparation of the activated silicate liquid is completed; S7, filtrate solidification: the filtrate of the water purifier filtered in the liquid PAC tank (5) is transported to the mixing solidification tank (6) and stirred, and then the prepared activated silicate liquid is slowly added, the preparation ratio is 65% water purifier filtrate: 35% activated silicate liquid, mixed and solidified to obtain a semi-solid polysilicon sulfur chloride aluminum iron water purifier; S8, flash drying: after the solidification is completed, the semi-solid polysilicon sulfur chloride aluminum iron water purifier is transported to the flash dryer (7) through a conveying device for drying; S9. Packaging: The dried solid polysilicon sulfur chloride aluminum iron water purifier is packaged for sale.

5. The process for producing water purifier by comprehensive utilization of red mud according to claim 4, characterized in that: The conditions for the polymerization reaction are as follows: the steam introduced into the polymerization reactor (3) is 0.5 MPa, the heating reaction time of the polymerization reactor (3) is 5 hours, and the pressure of the polymerization reactor (3) is maintained at 0.3-0.5 MPa during the reaction process.

6. The process for producing water purifier by comprehensive utilization of red mud according to claim 4, characterized in that: The temperature of the water purification agent filtrate produced by the solid-liquid separation of the plate and frame filter press (4) and temporarily stored in the liquid PAC tank (5) is 60-65°C.

7. The process for producing water purifier by comprehensive utilization of red mud according to claim 4, characterized in that: During the preparation of the activated silicic acid, the stirring speed is 120 rpm, and the diluted sodium silicate solution is added to the activated silicic acid preparation tank (8) to prepare the activated silicic acid liquid, and the stability maintenance time is 5 hours.

8. The process for producing water purifier by comprehensive utilization of red mud according to claim 4, characterized in that: During the solidification process of the filtrate, the stirring speed inside the mixing solidification tank (6) is 120 rpm. The liquid polysilicon sulfur chloride aluminum ferric mixed with the water purifier filtrate and the activated silicate liquid maintains stability for 24 hours and solidifies within 24-36 hours.

9. The process for producing water purifier by comprehensive utilization of red mud according to claim 2, characterized in that: The polymerization reaction section tail gas washing equipment (11) and the flash drying tail gas washing equipment (12) are both composed of a washing tower and a water circulation tank.

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