TWM638339U - Wastewater treatment system with descaling function - Google Patents

Abstract

The invention discloses a wastewater treatment system with descaling function, which includes a fluorine-containing wastewater treatment facility and a descaling facility. The fluorine-containing wastewater treatment facility is configured to convert fluoride ions in the fluoride-containing wastewater into calcium fluoride, the descaling facility is connected to the fluoride-containing wastewater treatment facility, and the descaling facility is configured to introduce a descaling agent into the fluorine-containing wastewater treatment In the facility, descaling is carried out by circulating between the fluorine-containing wastewater treatment facility and the descaling facility. Therefore, the negative impact of fouling substances on the wastewater treatment efficiency can be reduced, and the continuous and long-term stable operation of the system can be ensured.

Description

Wastewater treatment system with descaling function

The invention relates to a wastewater treatment system, in particular to a wastewater treatment system with scale removal function, which is suitable for treating wastewater containing fluorine salts, sulfates or silicates and other substances that easily form scales with calcium ions.

The use of fluoride is common in various industrial processes, and the treatment of fluoride-containing wastewater has also been derived. In order to prevent the fluorine ions in the wastewater from polluting the environment and make the discharged water meet the discharge standards set by the government, the industry has developed many technologies for the treatment of fluoride-containing wastewater. For example, most high-tech factories treat the fluorine-containing wastewater generated after using hydrofluoric acid, first collecting the wastewater through pipelines to the wastewater treatment system, and then adding calcium salts such as calcium chloride and calcium hydroxide to the wastewater etc., react fluoride ions present in wastewater with calcium ions to form calcium fluoride particles, and then separate calcium fluoride particles from wastewater.

However, in addition to fluorine salts, fluorine-containing wastewater often contains other substances that will react with the added calcium salts to form scales, such as sulfates and silicates. The wastewater treatment system is prone to fouling and clogging of pipelines, equipment, instruments or tanks under long-term operation, resulting in the inability of wastewater to enter the system at the originally designed flow rate. In the worst case, it can only be used by replacing pipelines or equipment. system recovery.

Therefore, there are still practical problems and bottlenecks that need to be solved urgently in the existing wastewater treatment system.

The technical problem to be solved in this creation is to provide a wastewater treatment system with descaling function in view of the deficiencies of the existing technology, which has the characteristics of the first item in the scope of the patent application, and can effectively dissolve the scaling substances and discharge them out of the system. And maintain the operation under the designed processing flow range.

In order to solve the above technical problems, one of the technical solutions adopted in this creation is to provide a wastewater treatment system with descaling function, including a fluorine-containing wastewater treatment facility and a descaling facility. The fluorine-containing wastewater treatment facility is configured to convert fluoride ions in the fluoride-containing wastewater into calcium fluoride. The descaling facility is connected to the fluorine-containing wastewater treatment facility, and the descaling facility is configured to introduce a descaling agent into the fluorine-containing wastewater treatment facility, and circulate through the fluorine-containing wastewater treatment facility Descaling is carried out in a way between the facility and the descaling facility.

In one embodiment of the present creation, the descaling facility includes at least one descaling device, at least one of the descaling devices includes a storage container and a dosing pipeline, and the dosing pipeline is connected to the storage container Between the fluorine-containing wastewater treatment facility and on the dosing pipeline, a filter and a delivery pump behind the filter are installed.

In an embodiment of the present invention, the fluorine-containing wastewater treatment facility includes a fluorine-containing wastewater reaction device and a first solid-liquid separation device. The fluorine-containing wastewater reaction device is configured to receive the fluoride-containing wastewater, and add a calcium compound to the fluoride-containing wastewater to react with the fluoride ions to form the calcium fluoride. The first solid-liquid separation device is connected to the fluorine-containing wastewater reaction device to perform solid-liquid separation treatment on the reacted fluorine-containing wastewater.

In an embodiment of the present creation, the fluorine-containing wastewater reaction device includes a reaction tank and an agitator arranged in the reaction tank.

In an embodiment of the present creation, the fluorine-containing wastewater treatment facility further includes a first sludge thickening device, and the first sludge thickening device is communicated with the first solid-liquid separation device.

In an embodiment of the present creation, the fluorine-containing wastewater treatment facility further includes a sludge dewatering device, and the sludge dewatering device is connected to the first sludge thickening device.

In an embodiment of the present invention, a first delivery pipeline and a first return pipeline are connected between the fluorine-containing wastewater reaction device and the first solid-liquid separation device. In addition, a second delivery pipeline is connected between the first solid-liquid separation device and the first sludge thickening device, and the first solid-liquid separation device discharges the treated water through a first discharge pipeline. In addition, a third delivery pipeline is indirectly provided between the first sludge thickening device and the sludge dewatering device.

In an embodiment of the present creation, at least one of the descaling devices further includes a circulation line, and the dosing line, the circulation line, the first to the third delivery lines, and the first return line and at least one of the first discharge lines constitute a descaling treatment circuit.

In an embodiment of the present creation, the fluorine-containing wastewater treatment facility further includes a second solid-liquid separation device and a second sludge thickening device. The second solid-liquid separation device is connected to the fluorine-containing wastewater reaction device to perform solid-liquid separation treatment on the reacted fluorine-containing wastewater, and the second solid-liquid separation device is set to be connected with the first The solid-liquid separation devices operate in parallel. The second sludge thickening device is connected between the second solid-liquid separation device and the sludge dehydration device.

In an embodiment of the present invention, a fourth delivery pipeline and a second return pipeline are connected between the fluorine-containing wastewater reaction device and the second solid-liquid separation device. In addition, a fifth delivery pipeline is connected between the second solid-liquid separation device and the second sludge thickening device, and the second solid-liquid separation device discharges the treated water through a second discharge pipeline. In addition, a sixth delivery pipeline is indirectly provided between the second sludge thickening device and the sludge dehydration device.

In an embodiment of the present invention, at least one of the descaling devices further includes a circulation line, and the dosing line, the circulation line and the first to sixth delivery lines, the first and the second Two return lines and at least one of said first and second discharge lines constitute a descaling treatment circuit.

To sum up, the waste water treatment system with descaling function of this creation is suitable for treating waste water containing fluorine salts, sulfates or silicates, etc., which are easy to form scaling substances with calcium ions, and it can Connected to the fluorine-containing wastewater treatment facility" and "the descaling facility is configured to introduce a descaling agent into the fluorine-containing wastewater treatment facility, and circulate between the fluorine-containing wastewater treatment facility and the The technical feature of descaling between descaling facilities" is to reduce the negative impact of scaling substances on wastewater treatment efficiency and ensure the continuous and long-term stable operation of the system. Furthermore, when there is fouling and clogging of equipment or pipelines in the fluorine-containing wastewater treatment facilities, the descaling agent can dissolve and wash away the scaling substances deposited on any part of the equipment or pipelines in a cyclic and disturbed manner. to the outside.

In order to further understand the characteristics and technical content of this creation, please refer to the following detailed description and drawings about this creation. However, the provided drawings are only for reference and explanation, and are not used to limit this creation.

The following are specific examples to illustrate the implementation of the "wastewater treatment system with descaling function" disclosed in this creation. Those skilled in the art can understand the advantages and effects of this creation from the content disclosed in this specification. This creation can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the idea of this creation. In addition, the drawings of this creation are only for simple illustration, not according to the actual size of the depiction, prior statement. The following embodiments will further describe the relevant technical content of this creation in detail, but the disclosed content is not intended to limit the protection scope of this creation. In addition, the term "or" used herein may include any one or a combination of more of the associated listed items depending on the actual situation.

Unless otherwise defined, terms used herein have the same meaning as commonly understood by those skilled in the art. The materials involved in each embodiment are commercially available or prepared according to the prior art unless otherwise specified. The operations or instruments involved in each embodiment are conventional operations or instruments in the art unless otherwise specified.

[first embodiment]

Please refer to Figures 1 to 3, and in conjunction with Figure 5, the first embodiment of the present invention provides a wastewater treatment system Z with descaling function, which includes a fluorine-containing wastewater treatment facility 1 and a descaling facility 2, and The descaling facility 2 is connected to the fluorine-containing wastewater treatment facility 1 . When in use, the descaling facility 2 can feed a descaling agent into the device or pipeline that has the problem of scaling and clogging in the fluorine-containing wastewater treatment facility 1, so that the scaling material is dissolved under the action of the descaling agent, flushed and discharged out of the system. Thereby reducing the negative impact of fouling substances on the efficiency of wastewater treatment. Therefore, the waste water treatment system Z of the present invention can operate stably for a long time continuously under the designed treatment flow range.

In this embodiment, the fluorine-containing wastewater treatment facility 1 can be configured to convert fluoride ions in the fluoride-containing wastewater into calcium fluoride, and the descaling facility 2 can be configured to introduce the descaling agent into the fluorine-containing wastewater treatment facility 1, And descaling is carried out in a manner that circulates between the fluorine-containing wastewater treatment facility 1 and the descaling facility 2 . The fluorine-containing wastewater mentioned in this article can be various industrial process wastewater, regeneration wastewater or backwash wastewater. However, the present invention is not limited to the examples cited above.

Specifically, as shown in FIG. 3 , the fluorine-containing wastewater treatment facility 1 mainly includes a fluorine-containing wastewater reaction device 11 and a first solid-liquid separation device 12 . The fluorine-containing wastewater reaction device 11 can be configured to receive fluorine-containing wastewater and add a calcium compound to the fluoride-containing wastewater, which can react with fluoride ions to form calcium fluoride (calcium fluoride sludge), an insoluble substance. The first solid-liquid separation device 12 is connected to the fluorine-containing wastewater reaction device 11 to perform solid-liquid separation treatment on the fluorine-containing wastewater after the reaction, that is, to separate particles and muddy substances from the water body to achieve the fluorine contained in the wastewater. The purpose of ion removal. The first solid-liquid separation device 12 may include a settling tank or a flotation tank, but is not limited thereto.

In practical application, the fluorine-containing wastewater reaction device 11 may include a reaction tank 111 and an agitator 112 disposed in the reaction tank 111 . The reaction tank 111 can be connected to a waste water input pipeline P10 to introduce fluorine-containing waste water into the internal space for chemical reaction, and the reaction tank 111 can have a dosing end, its main function is to add the required amount of calcium compound to the in fluoride wastewater. The chemical reaction of fluoride-containing wastewater can be controlled under alkaline conditions (pH = 8.0~9.0), in which calcium compounds can be calcium salts such as calcium chloride or calcium hydroxide, and can be added in the form of solutions, but this creation is not subject to Limited to this; and the dosage of calcium compound can be determined according to the fluoride ion concentration in the wastewater and the total amount of wastewater. The agitator 112 can fully agitate the fluorine-containing wastewater to increase the collision probability between calcium compounds and fluoride ions, and reduce the concentration of fluoride ions in the fluoride-containing wastewater as much as possible.

According to actual needs, the fluorine-containing wastewater treatment facility 1 may also include a raw water tank 13 for storing fluorine-containing wastewater to be treated, and the wastewater input pipeline P10 may be connected between the raw water tank 13 and the fluorine-containing wastewater reaction device 11 .

As shown in FIG. 2 and FIG. 5 , the descaling facility 2 may include at least one descaling device 2 a, and the descaling device may include a storage container 21 and a drug feeding pipeline 22 . The storage container 21 is used to store the descaling agent, which can be a storage bucket, but is not limited thereto. The dosing pipeline 22 is connected between the storage container 21 and the fluorine-containing wastewater treatment facility 1 , and the dosing pipeline 22 is equipped with a filter 23 and a delivery pump 24 behind the filter 23 . Accordingly, when there is fouling and clogging of devices or pipelines in the fluorine-containing wastewater treatment facility 1, the delivery pump 24 can be controlled to start working (the system’s water delivery/return water control valve is closed, and the water inlet pump stops working), so as to store The descaling agent in the container 21 is exported to the fluorine-containing wastewater treatment facility 1, and the fouling substances deposited on any part of the device or pipeline are dissolved and discharged to the outside in a cyclic disturbance manner.

It is worth mentioning that there are often other substances in fluorine-containing wastewater that will react with the added calcium compounds to form scales, such as sulfates, silicates, etc., and the descaling device 2a can effectively remove Fouling substances causing blockage in fluoride wastewater treatment facility 1. Preferably, the descaling agent in the descaling device 2a may be oxalic acid, ethylenediaminetetraacetic acid (EDTA), liquid caustic soda or thiosulfate, but not limited thereto.

In some embodiments, a first delivery pipeline P11 and a first return pipeline P21 are indirectly provided between the fluorine-containing wastewater reaction device 11 and the first solid-liquid separation device 12 . The first delivery pipeline P11 can be configured to send the reacted fluorine-containing wastewater from the fluorine-containing wastewater reaction device 11 to the first solid-liquid separation device 12 for solid-liquid separation treatment, and the first return line P21 can be configured to transfer the first The calcium fluoride sludge separated by the solid-liquid separation device 12 is returned to the fluorine-containing wastewater reaction device 11 for chemical reaction. Also, the first solid-liquid separation device 12 can be connected to a first discharge line P31, and the first discharge line P31 can be configured to discharge the treated water separated by the first solid-liquid separation device 12 from a predetermined position, so that for further processing, recycling or discharge.

Please refer to FIG. 3 again, and as shown in FIG. 5 , in this invention, the fluorine-containing wastewater treatment facility 1 may also include a first sludge thickening device 14 and a sludge dehydration device 15 . The first sludge thickening device 14 is communicated with the first solid-liquid separation device 12, and the first sludge thickening device 14 can be configured to receive the calcium fluoride sludge separated from the reacted fluorine-containing wastewater, and through the extension The sludge settling time is used to reduce the water content of the sludge. The first sludge thickening device 14 can be a gravity thickening device, but is not limited thereto. The sludge dewatering device 15 is connected to the first sludge thickening device 14, and the sludge dewatering device 15 can be configured to dehydrate the concentrated calcium fluoride sludge to further reduce the water content of the sludge and reduce the sludge concentration. volume of. Therefore, the amount of sludge output will be significantly reduced, so as to achieve the purpose of saving sludge transportation costs.

In some embodiments, a second delivery pipeline P12 is indirectly provided between the first solid-liquid separation device 12 and the first sludge thickening device 14, and a second pipeline P12 is indirectly provided between the first sludge thickening device 14 and the sludge dewatering device 15 Three transfer lines P13. The second transfer line P12 can be configured to send the calcium fluoride sludge separated by the first solid-liquid separation device 12 to the first sludge thickening device 14 for concentration and dehydration, and the third transfer line P13 can be configured to transfer the concentrated The final sludge is sent to the sludge dewatering device 15 for deep dehydration.

In actual application, the descaling device 2a may also include a circulation line 25, and the dosing line 22 and the circulation line 25 of the descaling device 2a may be connected with the first to third delivery lines P11-P13, the first return line P21 and the second At least one of the discharge pipelines P31 constitutes a descaling treatment circuit; during the descaling treatment process, the water supply/return water control valve of the system is closed, and the water inlet pump stops working. On this basis, descaling can be achieved by circulating the descaling agent between the fluorine-containing wastewater treatment facility 1 and the descaling facility 2 . It is worth mentioning that the impurities flowing with the descaling agent can be intercepted by the filter 23 on the dosing pipeline 22 to ensure that the descaling process will not be disturbed.

[Second embodiment]

Please refer to Fig. 4, and as shown in Fig. 1 and Fig. 5, the second embodiment of the present invention provides a wastewater treatment system Z with descaling function, which includes a fluorine-containing wastewater treatment facility 1 and a descaling facility 2, and The descaling facility 2 is connected to the fluorine-containing wastewater treatment facility 1 . The fluorine-containing wastewater treatment facility 1 can be configured to convert fluoride ions in the fluoride-containing wastewater into calcium fluoride, and the descaling facility 2 can be configured to introduce the descaling agent into the fluorine-containing wastewater treatment facility 1, and flow through the fluoride-containing wastewater in a circular manner. Descaling is carried out between the fluorine wastewater treatment facility 1 and the descaling facility 2.

In this embodiment, in addition to the fluorine-containing wastewater reaction device 11, the first solid-liquid separation device 12, the first sludge thickening device 14 and the sludge dehydration device 15 described in the first embodiment, the fluorine-containing wastewater The treatment facility 1 may further include a second solid-liquid separation device 16 and a second sludge thickening device 17 to improve wastewater treatment efficiency. The second solid-liquid separation device 16 may have the same configuration and function as the first solid-liquid separation device 12 , and the second sludge thickening device 17 may have the same configuration and function as the first sludge thickening device 14 . For the technical details of the fluorine-containing wastewater reaction device 11 , the first solid-liquid separation device 12 , the first sludge thickening device 14 and the sludge dehydration device 15 , reference can be made to the first embodiment, so details are not repeated here.

Specifically, the second solid-liquid separation device 16 is connected to the fluorine-containing wastewater reaction device 11 to perform solid-liquid separation treatment on the reacted fluorine-containing wastewater, and the second solid-liquid separation device 16 is set to separate from the first solid-liquid The devices 12 operate in parallel. The second sludge concentration device 17 is connected between the second solid-liquid separation device 16 and the sludge dehydration device 15, and the second sludge concentration device 17 can be configured to receive the fluorine separated by the second solid-liquid separation device 16 Calcium sludge, and reduce the moisture content of sludge by prolonging the sludge settling time. Then, the sludge concentrated by the second sludge thickening device 17 can also be sent to the sludge dewatering device 15 for deep dehydration. Therefore, even if the descaling device 2a is descaling the first solid-liquid separation device 12 or the pipeline connected to the first solid-liquid separation device 12, the reacted fluorine-containing waste water discharged from the fluorine-containing waste water reaction device 11 can still It is introduced into the second solid-liquid separation device 16 for solid-liquid separation treatment, and can continue to pass through the second sludge thickening device 17 and sludge dehydration device 15 for subsequent treatment, so as to avoid the wastewater treatment process from stopping at the solid-liquid separation stage.

In some embodiments, a fourth delivery pipeline P14 and a second return pipeline P22 are indirectly provided between the fluorine-containing wastewater reaction device 11 and the second solid-liquid separation device 16 . The fourth delivery pipeline P14 can be configured to send the reacted fluorine-containing wastewater from the fluorine-containing wastewater reaction device 11 to the second solid-liquid separation device 16 for solid-liquid separation treatment, and the second return line P22 can be configured to transfer the second The calcium fluoride sludge separated by the solid-liquid separation device 16 is returned to the fluorine-containing wastewater reaction device 11 for chemical reaction. Moreover, a fifth delivery pipeline P15 is indirectly provided between the second solid-liquid separation device 16 and the second sludge thickening device 17, and the second solid-liquid separation device 16 discharges the treated water through a second discharge pipeline P32. The fifth delivery pipeline P15 can be configured to send the calcium fluoride sludge separated by the second solid-liquid separation device 16 to the second sludge thickening device 17 for concentration and dehydration, and the second discharge pipeline P32 can be configured to transfer the calcium fluoride sludge The treated water separated by the second solid-liquid separation device 16 is discharged from a predetermined position for subsequent treatment, recovery or discharge. In addition, a sixth conveying pipeline P16 is indirectly provided between the second sludge thickening device 17 and the sludge dewatering device 15, and the sixth conveying pipeline P16 can be configured to send the concentrated sludge to the sludge dewatering device 15 for further processing. dehydration.

In actual application, the dosing pipeline 22 and the circulation pipeline 25 of the descaling device 2a can be connected with the first to sixth delivery pipelines P11-P16, the first and second return pipelines P21, P22 and the first and second discharge pipelines P31, At least one of P32 constitutes a descaling treatment circuit; during the descaling treatment process, the water supply/return water control valve of the system is closed, and the water pump stops working. On this basis, descaling can be achieved by circulating the descaling agent between the fluorine-containing wastewater treatment facility 1 and the descaling facility 2 .

The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and will not be repeated here to reduce repetition. Likewise, the related technical details mentioned in this embodiment can also be applied in the first embodiment.

[Advantageous Effects of Embodiment]

To sum up, the waste water treatment system with descaling function of this creation is suitable for treating waste water containing fluorine salts, sulfates or silicates, etc., which are easy to form scaling substances with calcium ions, and it can Connected to the fluorine-containing wastewater treatment facility" and "the descaling facility is configured to introduce a descaling agent into the fluorine-containing wastewater treatment facility, and circulate between the fluorine-containing wastewater treatment facility and the The technical feature of descaling between descaling facilities" is to reduce the negative impact of scaling substances on wastewater treatment efficiency and ensure the continuous and long-term stable operation of the system. Furthermore, when there is fouling and clogging of equipment or pipelines in the fluorine-containing wastewater treatment facilities, the descaling agent can dissolve and wash away the scaling substances deposited on any part of the equipment or pipelines in a cyclic and disturbed manner. to the outside.

The content disclosed above is only the preferred feasible embodiment of this creation, and does not limit the scope of patent application for this creation. Therefore, all equivalent technical changes made by using the instructions and drawings of this creation are included in the application of this creation. within the scope of the patent.

Z: Wastewater treatment system 1: Fluorine-containing wastewater treatment facilities 11: Fluorine-containing wastewater reaction device 111: Reaction tank 112: Stirrer 12: The first solid-liquid separation device 13: Original sink 14: The first sludge thickening device 15: Sludge dewatering device 16: The second solid-liquid separation device 17: The second sludge thickening device 2: Descaling facilities 2a: Descaling device 21: storage container 22: Dosing pipeline 23: filter 24: Delivery pump 25: Circulation pipeline P10: Wastewater input pipeline P11: The first delivery pipeline P12: Second delivery pipeline P13: The third delivery pipeline P14: The fourth delivery pipeline P15: Fifth delivery pipeline P16: The sixth delivery pipeline P21: First return line P22: Second return line P31: First discharge line P32: Second discharge line

Fig. 1 is the overall structure diagram of the wastewater treatment system with descaling function created by this invention.

Fig. 2 is the specific architecture diagram of the waste water treatment system with descaling function created by this invention.

FIG. 3 is an implementation framework diagram of the fluorine-containing wastewater treatment facility of the wastewater treatment system with descaling function of the present invention.

Fig. 4 is another implementation framework diagram of the fluorine-containing wastewater treatment facility of the wastewater treatment system with descaling function in this invention.

Fig. 5 is a schematic diagram of the descaling treatment circuit of the waste water treatment system with descaling function of the present invention.

Z: Wastewater treatment system

1: Fluorine-containing wastewater treatment facilities

2: Descaling facilities

Claims (11)

A wastewater treatment system with descaling function, comprising: A fluoride wastewater treatment facility configured to convert fluoride ions in the fluoride wastewater into calcium fluoride; A descaling facility, connected to the fluorine-containing wastewater treatment facility, wherein the descaling facility is configured to introduce a descaling agent into the fluorine-containing wastewater treatment facility, and circulate through the fluorine-containing wastewater treatment facility Descaling is carried out in a way between the facility and the descaling facility. The wastewater treatment system with descaling function as described in claim 1, wherein, the descaling facilities include at least one descaling device, at least one of the descaling devices includes a storage container and a dosing pipeline, the adding The medicine pipeline is connected between the storage container and the fluorine-containing wastewater treatment facility, and a filter and a delivery pump behind the filter are installed on the medicine adding pipeline. The wastewater treatment system with descaling function as described in claim 2, wherein the fluorine-containing wastewater treatment facility includes: a fluorine-containing wastewater reaction device configured to receive the fluoride-containing wastewater and add a calcium compound to the fluoride-containing wastewater to react with the fluoride ions to form the calcium fluoride; and A first solid-liquid separation device, connected to the fluorine-containing wastewater reaction device, for performing solid-liquid separation treatment on the reacted fluorine-containing wastewater. The wastewater treatment system with descaling function according to claim 3, wherein the fluorine-containing wastewater reaction device includes a reaction tank and an agitator arranged in the reaction tank. The wastewater treatment system with descaling function according to claim 3, wherein the fluorine-containing wastewater treatment facility further includes a first sludge thickening device, and the first sludge thickening device is connected to the first Solid-liquid separation device. The wastewater treatment system with descaling function according to claim 5, wherein the fluorine-containing wastewater treatment facility further includes a sludge dewatering device, and the sludge dewatering device is connected to the first sludge thickening device . The wastewater treatment system with descaling function according to claim 6, wherein a first delivery pipeline and a first return pipeline are connected between the fluorine-containing wastewater reaction device and the first solid-liquid separation device; A second delivery pipeline is connected between the first solid-liquid separation device and the first sludge thickening device, and the first solid-liquid separation device discharges the treated water through a first discharge pipeline; the first sludge A third delivery pipeline is indirectly provided between the thickening device and the sludge dewatering device. The wastewater treatment system with descaling function according to claim 7, wherein at least one of the descaling devices further includes a circulation line, and the dosing line, the circulation line and the first to third At least one of the delivery line, the first return line and the first discharge line constitutes a descaling treatment circuit. The wastewater treatment system with descaling function as described in claim 7, wherein the fluorine-containing wastewater treatment facility also includes: A second solid-liquid separation device, connected to the fluorine-containing wastewater reaction device, to perform solid-liquid separation treatment on the fluorine-containing wastewater after the reaction, and set to operate in parallel with the first solid-liquid separation device; A second sludge thickening device is connected between the second solid-liquid separation device and the sludge dehydration device. The wastewater treatment system with descaling function as described in claim 9, wherein a fourth delivery pipeline and a second return pipeline are connected between the fluorine-containing wastewater reaction device and the second solid-liquid separation device; A fifth delivery pipeline is connected between the second solid-liquid separation device and the second sludge thickening device, and the second solid-liquid separation device discharges the treated water through a second discharge pipeline; the second sludge A sixth delivery pipeline is indirectly provided between the thickening device and the sludge dewatering device. The wastewater treatment system with descaling function according to claim 10, wherein at least one of the descaling devices further includes a circulation pipeline, and the dosing pipeline, the circulation pipeline and the first to sixth At least one of the delivery line, the first and second return lines, and the first and second discharge lines constitutes a descaling treatment circuit.

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