Ionic rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recycling system

Abstract

The utility model relates to the field of wastewater treatment devices, in particular to an ionic rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recycling system. The system comprises a chlorine salt reaction device (1), a deamination system (2), a solid-liquid separation system (3), an evaporation system (4) and a drying system (5), the chlorine salt reaction device (1) is a chlorine salt reactor; a deamination system (2), a solid-liquid separation system (3), an evaporation system (4) and a drying system (5) are sequentially connected behind the chlorine salt reactor; and the chlorine salt reaction device (1) is respectively connected with a high-chlorine ammonia-nitrogen wastewater conveying pipeline (6) and a slaked lime adding device (7). According to the utility model, two inorganic products, namely an ammonium product and calcium chloride, are obtained, so that not only is the wastewater treated, but also good economic benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to an ionic rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recovery system. Background Technique

[0002] Ionic rare earth ore is an important source of rare earth in China. Its smelting and extraction process mainly includes the leaching of rare earth ore and the separation and purification of mixed rare earth oxides. Among them, the separation and purification process of mixed rare earth oxides is to extract single rare earth oxides from mixed rare earth oxides through processes such as acidolysis, saponification, extraction, separation, precipitation, washing, and roasting. In the process of separating and purifying mixed rare earth oxides, hydrochloric acid acidolysis and ammonia water saponification are required, and a large amount of ammonia-nitrogen wastewater with high chloride ions will be generated during this process. If this kind of wastewater is not treated in time and effectively, it will bring serious environmental problems.

[0003] At present, the treatment of ionic rare earth high-chlorine ammonia-nitrogen wastewater mainly focuses on the treatment of ammonia nitrogen in the wastewater. The methods used mainly aim to remove ammonia nitrogen in the wastewater or simply recover ammonium chloride resources.

[0004] Conventional methods for removing ammonia nitrogen from wastewater:

[0005]

[0006] As can be seen from the above table, for the treatment of this type of rare earth wastewater, methods such as biochemical treatment, membrane treatment, or evaporation not only produce a large amount of waste sludge, but also have poor ammonia nitrogen treatment effects, high costs, and the ammonia nitrogen resources cannot be recycled. Membrane treatment has high requirements for the influent water quality, limited treatment capacity, a large amount of concentrated water, and incomplete treatment. When using the evaporation method to recover ammonium chloride products, the evaporation condensate contains a large amount of ammonia and needs to be further deammoniated before it can be reused in production. This treatment method is incomplete, the disposal of the final mother liquor is the key consideration, and the energy consumption is high, and there is no economic advantage.

[0007] Therefore, a better method for treating such wastewater is needed to realize the resource recovery and utilization of its effective components, reduce costs while achieving environmental protection. Content of the Utility Model

[0008] The object of the present utility model is to provide a treatment and resource recovery system for high-chlorine ammonia-nitrogen wastewater of ionic rare earths in view of the deficiencies of the existing technologies for treating high-chlorine ammonia-nitrogen wastewater of ionic rare earths. In this system, the high-chlorine ammonia-nitrogen wastewater is mixed and reacted with calcium hydroxide to form a thick slurry containing calcium chloride. After the thick slurry directly enters the ammonia removal system for ammonia removal, the ammonia gas is absorbed by the absorbent to form ammonia water or ammonium salt products. After the slurry after ammonia removal is subjected to solid-liquid separation, the solid-phase mud cake mainly contains calcium hydroxide and returns to the chloride salt reactor, while the filtrate is evaporated and dried to form calcium chloride products. In this system, by adding low-cost calcium hydroxide reagent, not only the environmental pollution problem of high-chlorine ammonia-nitrogen wastewater of ionic rare earths is solved, but also the high-value resource utilization of ammonia nitrogen and chloride ions in the wastewater is realized, achieving the goal of zero wastewater discharge.

[0009] In order to achieve the above object of the utility model, the technical solution of the present utility model is as follows:

[0010] A treatment and resource recovery system for high-chlorine ammonia-nitrogen wastewater of ionic rare earths, the system includes a chloride salt reaction device, an ammonia removal system, a solid-liquid separation system, an evaporation system and a drying system; the chloride salt reaction device is a chloride salt reactor; the chloride salt reactor is sequentially connected with an ammonia removal system, a solid-liquid separation system, an evaporation system and a drying system; a high-chlorine ammonia-nitrogen wastewater delivery pipeline and a calcium hydroxide addition device are respectively connected to the chloride salt reaction device.

[0011] Further, in the treatment and resource recovery system for high-chlorine ammonia-nitrogen wastewater of ionic rare earths: the ammonia removal system includes an ammonia removal device and an absorption device, and the absorption device is used to absorb the ammonia gas generated by the ammonia removal device, thereby forming ammonia water or ammonium salt products; the ammonia removal system is connected to an ammonium product storage device.

[0012] Further, in the treatment and resource recovery system for high-chlorine ammonia-nitrogen wastewater of ionic rare earths, the solid-liquid separation system is connected to the chloride salt reactor through a solid-phase delivery pipeline, and is used to transport the solid phase generated by the solid-liquid separation system back to the chloride salt reactor to continue to participate in the reaction.

[0013] Further, in the treatment and resource recovery system for high-chlorine ammonia-nitrogen wastewater of ionic rare earths, the drying system is connected to a calcium chloride storage device.

[0014] Further, in the treatment and resource recovery system for high-chlorine ammonia-nitrogen wastewater of ionic rare earths, the ammonium product storage device is connected to the device in the leaching or saponification process in the traditional ionic rare earth production process.

[0015] Further, in the treatment and resource recovery system for high-chlorine ammonia-nitrogen wastewater of ionic rare earths, a pH adjustment device and a pH measurement device are further provided on the chloride salt reactor, which are respectively used to detect the pH value and adjust the pH value, so as to control and adjust the dosage of calcium hydroxide added to the chloride salt reactor.

[0016] Further, in the ion-type rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recovery system described above, the ammonium product is used to return to the leaching and saponification processes in the ion-type rare earth production process, realizing the recycling and utilization of ammonia-nitrogen resources.

[0017] The device for producing ammonium products using the ion-type rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recovery system described above includes a chloride reactor and a deammoniation system connected to the chloride reactor; the chloride reactor is used for the mixed reaction of ion-type rare earth high-chlorine ammonia-nitrogen wastewater and added calcium hydroxide to form a mixed thick slurry with a high solid content; the deammoniation system is used to directly feed the mixed thick slurry with a high solid content into the deammoniation system without solid-liquid separation, and the ammonia-nitrogen in the ammonia-containing wastewater is converted into ammonia gas, which escapes from the deammoniation system and is absorbed by the absorbent to form an ammonium product.

[0018] The device for producing calcium chloride products using the ion-type rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recovery system described above includes a solid-liquid separation system, an evaporation system connected to the solid-liquid separation system, and a drying system connected to the evaporation system; the wastewater after deammoniation is separated into a solid phase and a liquid phase by the solid-liquid separation system, the solid phase is mainly calcium hydroxide and is returned to the chloride reactor for re-reaction, and the liquid phase enters the subsequent evaporation system for evaporation and concentration to form a calcium chloride concentrate; the calcium chloride concentrate is obtained as a calcium chloride product through the drying system.

[0019] A method for treating ion-type rare earth high-chlorine ammonia-nitrogen wastewater and resource recovery using the system described above includes the following steps:

[0020] (1) Chloride reaction: Feed the ion-type rare earth high-chlorine ammonia-nitrogen wastewater (ammonium chloride content is 50 - 200 g / L) into the chloride reactor, and add calcium hydroxide to the reactor for mixed reaction to form a mixed thick slurry with a high solid content;

[0021] In this application, the high-chlorine ammonia-nitrogen wastewater and calcium hydroxide mixed thick slurry do not need to be pre-solid-liquid separated and directly enter the deammoniation system.

[0022] (2) Deammoniation: Feed the mixed thick slurry with a high solid content into the deammoniation system for deammoniation, the ammonia-nitrogen ions in the thick slurry are converted into ammonia gas, which escapes from the deammoniation system and is absorbed by the absorbent to form ammonia water or ammonium salt products, which can be recycled for processes such as rare earth leaching and saponification; the slurry after deammoniation is discharged from the deammoniation system to the solid-liquid separation system;

[0023] (3) Solid-liquid separation: The slurry after deammoniation is separated into a solid phase and a liquid phase by the solid-liquid separation system, the solid phase is mainly calcium hydroxide, and the solid phase is returned to the chloride reactor to participate in the reaction, and the liquid phase enters the evaporation system;

[0024] (4) Evaporation: The liquid phase separated from the ammonia-removed thick slurry is concentrated by evaporation in the evaporation system to form a concentrated calcium chloride solution.

[0025] (5) Drying: The concentrated calcium chloride solution is dried in the drying system to obtain calcium chloride products.

[0026] As a preferred embodiment of the present application, in the ion-type rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recovery system, the reaction in step (1) is:

[0027] 2NH4Cl + Ca(OH)2 = CaCl2 + 2NH3↑ + 2H2O;

[0028] Calcium hydroxide is added in an amount of 0.8 to 1.0 times (specifically, it can be 0.8 times, 0.85 times, 0.9 times, 0.95 times, 1.0 times, etc.) the total mass of ammonia nitrogen in the wastewater.

[0029] As a preferred embodiment of the present application, in step (1) of the ion-type rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recovery method, the mixing reaction time is 1 - 3 h (specifically, it can be 1 h, 1.5 h, 2 h, 2.5 h, 3 h, etc.), and the temperature is normal temperature.

[0030] As a preferred embodiment of the present application, in step (1) of the ion-type rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recovery method, in the mixed thick slurry with a high solid content, the solid content is 10 - 20 wt% (specifically, it can be 10 wt%, 15 wt%, 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt%, etc.).

[0031] As a preferred embodiment of the present application, in step (2) of the ion-type rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recovery method, the conditions for ammonia removal are: pH value 10 - 12 (specifically, it can be 10, 10.5, 11, 11.5, 12, etc.), and the temperature is 110 - 140 °C (specifically, it can be 110 °C, 115 °C, 120 °C, 125 °C, 130 °C, 135 °C, 140 °C, etc.).

[0032] As a preferred embodiment of the present application, in step (2) of the ion-type rare earth high-chlorine ammonia-nitrogen wastewater treatment and resource recovery method, the ammonia removal process used for ammonia removal is a prior art, including but not limited to ammonia removal by distillation; after ammonia removal, the ammonia nitrogen content in the thick slurry is less than 5 mg / L.

[0033] As a preferred embodiment of the present application, in step (2) of the method for treating and resource-recovering high-chlorine ammonium-nitrogen wastewater from ionic rare earths, the obtained ammonium product can be used to return to the leaching and saponification processes in the ionic rare earth production process, realizing the recycling of ammonium-nitrogen resources.

[0034] As a preferred embodiment of the present application, in step (4) of the method for treating and resource-recovering high-chlorine ammonium-nitrogen wastewater from ionic rare earths, the raw liquid fed into the evaporator in the evaporation and concentration step, that is, the pH value of the liquid phase is 6.5 - 10 (specifically, it can be 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, etc.), and the mass concentration is 5 - 30% (specifically, it can be 5%, 10%, 15%, 20%, 25%, 30%, etc.).

[0035] As a preferred embodiment of the present application, in step (4) of the method for treating and resource-recovering high-chlorine ammonium-nitrogen wastewater from ionic rare earths, the evaporation and concentration ratio depends on the calcium chloride product specification, and the concentration ratio < 15 times.

[0036] As a preferred embodiment of the present application, in step (5) of the method for treating and resource-recovering high-chlorine ammonium-nitrogen wastewater from ionic rare earths, the calcium chloride product is anhydrous calcium chloride or dihydrate calcium chloride.

[0037] Compared with the existing technology, the beneficial effects of the present utility model are as follows:

[0038] (1) The present utility model effectively reduces the amount of high-chlorine ammonium-nitrogen wastewater generated from the separation and purification of mixed rare earth oxides, recovers the evaporation condensate water, saves water, and reduces the environmental problems caused by the discharge of high-chlorine ammonium-nitrogen wastewater.

[0039] (2) Through processes such as ammonia removal, the present utility model recovers ammonia water or ammonium salt products, which can be returned to the leaching and saponification processes in the ionic rare earth production process or sold as products, achieving the purpose of recycling ammonium-nitrogen resources.

[0040] (3) By setting up a chloride salt reactor, a solid-liquid separation system, an evaporation system, a drying system, etc., the present utility model recovers the chloride ions in the high-chlorine ammonium-nitrogen wastewater from ionic rare earths, forms calcium chloride products for production or sale, and has good economic benefits.

[0041] (4) The present utility model realizes zero discharge of the treatment of high-chlorine ammonium-nitrogen wastewater from ionic rare earths.

[0042] (5) Different from the conventional treatment methods for ammonia nitrogen wastewater, the present utility model adopts the addition of low-cost calcium hydroxide reagent to convert chloride ions in the wastewater into calcium chloride, which not only solves the ammonia nitrogen environmental pollution problem of ionic rare earth high-chloride ammonia nitrogen wastewater, but also realizes the conversion of ammonia nitrogen and chloride ions in the wastewater into resource products with high added value. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 FIG. is a schematic structural diagram of a treatment and resource recovery system for ionic rare earth high-chloride ammonia nitrogen wastewater according to the present utility model.

[0044] Wherein, 1 - chloride salt reaction device, 2 - deammoniation system, 3 - solid-liquid separation system, 4 - evaporation system, 5 - drying system, 6 - high-chloride ammonia nitrogen wastewater pipeline, 7 - slaked lime adding device, 8 - calcium chloride storage device, 9 - ammonium product storage device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] A treatment and resource recovery system for ionic rare earth high-chloride ammonia nitrogen wastewater, the system includes a chloride salt reaction device, a deammoniation system, a solid-liquid separation system, an evaporation system and a drying system; the chloride salt reaction device is a chloride salt reactor; the chloride salt reactor is sequentially connected with a deammoniation system, a solid-liquid separation system, an evaporation system and a drying system; the chloride salt reaction device is respectively connected with a high-chloride ammonia nitrogen wastewater pipeline and a slaked lime adding device.

[0046] Through the above device, products of two types including ammonium products and calcium chloride can be obtained. The ammonium product production part consists of a chloride salt reactor and a deammoniation system, and the calcium chloride product production part consists of a solid-liquid separation system, an evaporation system and a drying system.

[0047] Its working process is as follows:

[0048] Ammonium product production process:

[0049] (1) Chloride salt reaction: In the chloride salt reactor, the ionic rare earth high-chloride ammonia nitrogen wastewater and the added calcium hydroxide are mixed and reacted to form a mixed thick slurry with a high solid content;

[0050] (2) Deammoniation: The mixed thick slurry with a high solid content directly enters the deammoniation system without solid-liquid separation. The ammonia nitrogen in the ammonia-containing wastewater is converted into ammonia gas, which escapes from the deammoniation system and is absorbed by the liquid phase to form ammonium products such as ammonia water and ammonium sulfate. It can be recycled for processes such as rare earth leaching and saponification, or sold as a product. The deammoniated slurry is then discharged from the deammoniation system to the subsequent solid-liquid separation system.

[0051] Calcium chloride product production process:

[0052] (1) Solid-liquid separation: The slurry after deammoniation is separated into a solid phase and a liquid phase by a solid-liquid separation system. The solid phase is mainly calcium hydroxide, which is returned to the chloride salt reactor for further reaction, and the liquid phase enters the subsequent evaporation system;

[0053] (2) Evaporation: The deammoniated wastewater after solid-liquid separation enters the evaporation system for evaporation and concentration to form a concentrated calcium chloride solution;

[0054] (3) Drying: The concentrated calcium chloride solution is dried by a drying system to obtain calcium chloride products.

[0055] This technology recovers chloride ions from high-chlorine ammonia-nitrogen wastewater of ionic rare earths through processes such as chloride salt reaction, solid-liquid separation, evaporation, and drying, forming calcium chloride industrial salt products for production or sale, with good economic benefits.

[0056] All features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any way.

[0057] Any feature disclosed in this specification (including claims, abstract) can be replaced by other equivalent or similar-purpose alternative features unless specifically stated. That is, unless specifically stated, each feature is only an example of a series of equivalent or similar features.

[0058] The features and performance of the present utility model will be further described in detail below in conjunction with embodiments.

[0059] In the deammoniation system used in the following embodiments, the deammoniation system is a prior art, and the deammoniation process is not limited to the distillation method; in addition, the % used in this application, unless otherwise specified, all represent their mass percentages.

[0060] Example 1

[0061] As Figure 1 shown, the present utility model is applied to the high-chlorine ammonia-nitrogen wastewater treatment project of a rare earth smelting enterprise. The main system of this system consists of a chloride salt reactor, a deammoniation system, a solid-liquid separation system, evaporation, a drying system, etc. (The systems and processes not detailed in this application are all prior arts).

[0062] The specific method steps are as follows:

[0063] (1) The content of ammonium chloride in the raw high-chlorine ammonia-nitrogen wastewater is 100 g / L. First, the high-chlorine ammonia-nitrogen wastewater pipeline is introduced into the chloride salt reactor and mixed with slaked lime coming from the slaked lime adding device (the reaction time is 1.5 h). The slaked lime is added at 0.8 times the mass content of ammonia nitrogen in the wastewater, and finally a mixed thick slurry with a high solid content (10 wt%) is formed;

[0064] The reaction carried out in step (1) is as follows:

[0065] 2NH4Cl + Ca(OH)2 = CaCl2 + 2NH3↑ + 2H2O;

[0066] (2) The mixed thick slurry directly enters the deammoniation system without solid removal. The ammonium ions in the ammonia-containing wastewater are converted into ammonia gas, which escapes from the deammoniation equipment and is absorbed to form ammonia water or ammonium salt products. The high-chlorine thick slurry after ammonia deammoniation is discharged from the bottom of the deammoniation system. The deammoniation conditions in the deammoniation system are: pH is 12; the temperature is 120 °C.

[0067] The ammonia content in the high-chlorine thick slurry after deammoniation is less than 10 mg / L, and the removal rate is 99%.

[0068] (3) The slurry (wastewater) after deammoniation enters the pressure filtration equipment in the solid-liquid separation system for solid-liquid separation. The obtained solid-phase calcium hydroxide returns to the chlorine salt reactor to continue participating in the reaction, realizing the full utilization of calcium hydroxide; the liquid phase mainly contains a 9.4 wt% calcium chloride solution (pH is 12), which enters the subsequent evaporation system;

[0069] (4) The 9.4 wt% calcium chloride solution after solid-liquid separation is evaporated and concentrated in the evaporation system to form a calcium chloride concentrate; the mass concentration of the concentrate is between 38 - 40%.

[0070] (5) The formed calcium chloride concentrate enters the spray drying system for drying and then granulation to obtain anhydrous calcium chloride products (the evaporation and concentration ratio can be adjusted according to the type of calcium chloride products).

[0071] This technology realizes the zero discharge of high-chlorine ammonia-nitrogen wastewater, without wastewater discharge. While recycling the backwater resources, it also realizes the resource utilization of ammonia nitrogen and chloride ions in the wastewater, achieving the goal of "turning waste into treasure".

[0072] Example 2

[0073] As Figure 1 shown, the present utility model is applied to the high-chlorine ammonia-nitrogen wastewater treatment project of a rare earth smelting enterprise. The main system of this system consists of a chlorine salt reactor, a deammoniation system, a solid-liquid separation system, evaporation, drying systems, etc. (the systems not introduced in detail are all existing technologies). The specific method steps are as follows:

[0074] (1) The ammonium chloride content in the raw high-chlorine ammonia-nitrogen wastewater is 170 g / L. First, it enters the chlorine salt reactor through the high-chlorine ammonia-nitrogen wastewater pipeline and is mixed and reacted with the hydrated lime coming from the hydrated lime adding device. The hydrated lime is added according to 0.9 times the mass content of ammonia nitrogen in the wastewater, and finally a mixed thick slurry with a high solid content of 18 wt% is formed;

[0075] The reaction carried out in step (1) is as follows:

[0076] 2NH4Cl + Ca(OH)2=CaCl2 + 2NH3↑ + 2H2O;

[0077] (2) The mixed thick slurry directly enters the deammoniation system without solid removal. The ammonium ions in the ammonia-containing wastewater are converted into ammonia gas, which escapes from the deammoniation equipment and is absorbed into ammonia water or ammonium salt products. The high-chlorine thick slurry after ammonia removal from the ammonia water is discharged from the bottom of the deammoniation system, with a removal rate > 99%, and the ammonia content in the high-chlorine thick slurry after deammoniation is less than 10 mg / L;

[0078] (3) The slurry after deammoniation enters the pressure filtration equipment in the solid-liquid separation system for solid-liquid separation. The obtained solid-phase calcium hydroxide returns to the chloride salt reactor to realize the full utilization of calcium hydroxide. The liquid phase mainly contains a 16 wt% calcium chloride solution, which enters the subsequent evaporation system;

[0079] (4) The 16 wt% calcium chloride solution after solid-liquid separation is evaporated and concentrated in the evaporation system. The concentration of the concentrated solution is 68 - 72%, and it enters the slicing machine for slicing to obtain calcium chloride dihydrate products.

[0080] As can be seen from the above, this technology realizes the zero discharge of high-chlorine ammonia-nitrogen wastewater, without wastewater discharge. While recycling water resources, it also realizes the resource utilization of ammonia nitrogen and chloride ions in the wastewater, achieving the goal of "turning waste into treasure".

[0081] The above embodiments only represent the specific implementation manners of this application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the protection scope of this application. It should be noted that for those skilled in the art, without departing from the concept of the technical solution of this application, several modifications, equivalent replacements, improvements, etc. can be made, and these all belong to the protection scope of this application.

[0082] This background technology section is provided to generally present the context of the present utility model. The work of the currently named inventors, the work to the extent described in this background technology section, and aspects that are not prior art at the time of filing this application are neither expressly nor implicitly admitted to be prior art of the present utility model.

Claims

1. An ionic rare earth high chlorine ammonia nitrogen wastewater treatment and resource recovery system, characterized in that The system comprises a chloride salt reaction device (1), a deammoniation system (2), a solid-liquid separation system (3), an evaporation system (4) and a drying system (5); the chloride salt reaction device (1) is a chloride salt reactor; the chloride salt reactor is sequentially connected to the deammoniation system (2), the solid-liquid separation system (3), the evaporation system (4) and the drying system (5); the chloride salt reaction device (1) is respectively connected to a high-chlorine ammonia nitrogen wastewater delivery pipeline (6) and a slaked lime adding device (7).

2. The ionic rare earth high chlorine ammonia nitrogen wastewater treatment and resource recovery system according to claim 1 is characterized by: The deammoniation system (2) comprises a deammoniation device and an absorption device, wherein the absorption device is used to absorb ammonia gas generated by the deammoniation device to form ammonia water or an ammonium salt product; the deammoniation system (2) is connected to an ammonium product storage device (9).

3. The ionic rare earth high chlorine ammonia nitrogen wastewater treatment and resource recovery system according to claim 1 or 2, characterized in that: The solid-liquid separation system (3) is connected to the chloride salt reactor via a solid phase transport pipeline, which is used to transport the solid phase generated by the solid-liquid separation system (3) back to the chloride salt reactor to continue to participate in the reaction.

4. The ionic rare earth high chlorine ammonia nitrogen wastewater treatment and resource recovery system according to claim 3 is characterized in that: The drying system (5) is connected to the calcium chloride storage device (8).

5. The ionic rare earth high chlorine ammonia nitrogen wastewater treatment and resource recovery system according to claim 1 or 4, characterized in that: The ammonium product storage device (9) is connected to the device of the leaching or saponification process in the traditional ionic rare earth production process.

6. The ionic rare earth high chlorine ammonia nitrogen wastewater treatment and resource recovery system according to claim 5, characterized in that: The chloride salt reactor is also provided with a pH adjusting device and a pH measuring device, which are used to adjust the pH value of the slurry in the reactor and detect the pH, respectively, so as to control and adjust the amount of calcium hydroxide added to the chloride salt reactor.

7. The ionic rare earth high chlorine ammonia nitrogen wastewater treatment and resource recovery system according to claim 1 or 6, characterized in that: The ammonium product is used to return to the leaching and saponification process in the ionic rare earth production process to achieve the recovery and utilization of ammonia nitrogen resources.

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