Chlorine-containing wastewater treatment device

Abstract

The utility model provides a chlorine-containing wastewater treatment device, and particularly relates to the field of wastewater treatment. The chlorine-containing wastewater treatment device comprises a wastewater storage tank, a pH adjusting tank, a first sedimentation tank and a primary concentration device which are communicated in sequence; a first water outlet and a second water outlet are formed in the primary concentration device, and the first water outlet is connected with a reuse water storage tank through a pipeline; the second water outlet is sequentially connected with a secondary concentration device and a second sedimentation tank through a pipeline; the secondary concentration device comprises a third water outlet and a fourth water outlet, the third water outlet is communicated with the reuse water storage tank, and the fourth water outlet is communicated with the second sedimentation tank; wherein the second sedimentation tank is a dechlorination tank, and clear water in the second sedimentation tank flows back to the pH adjusting tank through a pipeline. According to the chlorine-containing wastewater treatment device, physical treatment and chemical treatment are combined, and a multi-stage treatment process is formed through internal circulation of the chlorine-containing wastewater treatment device, so that efficient removal of chloride ions is realized.

Description

Technical Field

[0001] The utility model relates to the field of wastewater treatment, in particular to a chlorine-containing wastewater treatment device. Background Art

[0002] Chlorine-containing wastewater mainly comes from the production processes of chemical, pharmaceutical, metal processing, textile and electric power industries. This type of wastewater contains high concentrations of chloride ions, which pose a potential threat to the environment and ecosystem. The accumulation of chloride ions in water bodies can lead to soil salinization, corrosion of metal pipes and equipment, and affect plant growth and the survival of aquatic organisms. Therefore, effective treatment of chlorine-containing wastewater is crucial for environmental protection. Traditional chlorine-containing wastewater treatment methods, such as chemical precipitation, adsorption, and biological treatment, can remove chloride ions to a certain extent, but often have problems such as low treatment efficiency, high cost, and complex operation, making it difficult to meet increasingly stringent environmental emission standards. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the utility model provides a chlorine-containing wastewater treatment device to improve the problem of low chloride ion treatment efficiency in chlorine-containing wastewater.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a chlorine-containing wastewater treatment device, which includes a wastewater storage tank, a pH adjustment tank, a first sedimentation tank and a primary concentration device which are connected in sequence. The primary concentration device is provided with a first water outlet and a second water outlet, the first water outlet is connected to the reuse water storage tank through a pipeline; the second water outlet is connected to the secondary concentration device and the second sedimentation tank in sequence through a pipeline; the secondary concentration device includes a third water outlet and a fourth water outlet, the third water outlet is connected to the reuse water storage tank, and the fourth water outlet is connected to the second sedimentation tank; wherein the second sedimentation tank is a dechlorination tank, and the clean water of the second sedimentation tank flows back to the pH adjustment tank through a pipeline.

[0005] In an example of the present invention, the pH adjusting tank includes a first adjusting tank and a second adjusting tank, the first adjusting tank is communicated with the second adjusting tank, and a pH detection device is disposed in the first adjusting tank and the second adjusting tank.

[0006] In one example of the utility model, the chlorine-containing wastewater treatment device also includes a raw water tank and an emergency storage tank. The raw water tank is connected to the recycled water storage tank through a pipeline. The emergency storage tank is arranged on a branch road between the raw water tank and the recycled water storage tank. The emergency storage tank, the raw water tank and the recycled water storage tank are connected through a three-way valve.

[0007] In an example of the present invention, an online water quality monitoring system is provided in the recycled water storage tank, and a chloride ion detection device is provided on the second sedimentation tank.

[0008] In one example of the utility model, the pH adjusting tank is provided with a first feeding device for feeding a pH adjusting agent, and the second sedimentation tank is provided with a second feeding device for feeding a dechlorinating agent.

[0009] In one example of the present invention, the chlorine-containing wastewater treatment device also includes a controller, which is electrically connected to the pH detection device, the online water quality monitoring system, the first feeding device, the second feeding device, the chloride ion detection device and the three-way valve respectively.

[0010] In one example of the present invention, the primary concentration device includes an ultrafiltration device and a reverse osmosis device which are arranged in sequence.

[0011] In one example of the utility model, a sand filter is further provided between the first sedimentation tank and the primary concentrating device, the water inlet of the sand filter is communicated with the water outlet of the first sedimentation tank, and the water outlet of the sand filter is communicated with the water inlet of the primary concentrating device.

[0012] In one example of the utility model, the chlorine-containing wastewater treatment device also includes a sludge storage tank, a first sludge outlet is provided on the first sedimentation tank, a second sludge outlet is provided on the second sedimentation tank, and the first sludge outlet and the second sludge outlet are respectively connected to the sludge storage tank.

[0013] In an example of the present invention, the chlorine-containing wastewater treatment device further includes a desludging machine, and the desludging machine is connected to the sludge storage tank.

[0014] The chlorine-containing wastewater treatment device provided by the utility model adjusts the chlorine-containing wastewater to neutrality in a pH adjustment tank to optimize precipitation reaction conditions, removes heavy metals and suspended particles in the water in a first sedimentation tank, and discharges the clean water treated by the primary concentration device into a reuse water storage tank for storage, and discharges the generated concentrated water into a secondary concentration device for further treatment. The clean water generated by the secondary concentration device is also discharged into the reuse water storage tank for storage, and the wastewater generated by the secondary concentration device reacts with a dechlorinating agent in a second sedimentation tank to generate precipitation to remove chloride ions in the water, and the clean water in the second sedimentation tank is discharged into a pH adjustment tank for reprocessing. The chlorine-containing wastewater treatment device of the present application combines physical treatment and chemical treatment, and forms a multi-stage treatment process through its internal circulation to achieve efficient removal of chloride ions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a flow chart of a chlorine-containing wastewater treatment device in one embodiment of the present invention.

[0017] Component number description

[0018] 100, wastewater storage tank; 200, pH adjustment tank; 210, first adjustment tank; 220, second adjustment tank; 300, first sedimentation tank; 400, primary concentration device; 410, ultrafiltration device; 420, reverse osmosis device; 500, recycled water storage tank; 501, water quality online monitoring system; 510, raw water tank; 520, emergency storage tank; 530, three-way valve; 600, secondary concentration device; 700, second sedimentation tank; 800, sand filter; 810, clean water tank; 900, sludge storage tank; 910, desludge machine. DETAILED DESCRIPTION

[0019] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0020] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0021] See also Figure 1The utility model provides a chlorine-containing wastewater treatment device, which includes a wastewater storage tank 100, a pH adjustment tank 200, a first sedimentation tank 300 and a primary concentration device 400 connected in sequence. The primary concentration device 400 includes a first water outlet and a second water outlet, the first water outlet is connected to the reuse water storage tank 500 through a pipeline, and the second water outlet is connected to the secondary concentration device 600 and the second sedimentation tank 700 in sequence through a pipeline. The secondary concentration device 600 includes a third water outlet and a fourth water outlet, the third water outlet is connected to the reuse water storage tank 500, and the fourth water outlet is connected to the second sedimentation tank 700. Among them, the second sedimentation tank 700 is a dechlorination tank. The wastewater is collected by the wastewater storage tank 100, and then concentrated by the primary concentration device 400 and the secondary concentration device 600 in sequence, and the concentrated water produced is subjected to chloride ion precipitation treatment in the second sedimentation tank 700, and the supernatant in the second sedimentation tank 700 is refluxed to the pH adjustment tank 200 for reprocessing, thereby improving the removal efficiency of chloride ions. There is no restriction on the shapes and sizes of the above components, and they can be adjusted according to actual needs.

[0022] See also Figure 1 , a pH detection device for detecting the acidity and alkalinity of the wastewater in the pH adjustment tank 200 is provided in the pH adjustment tank 200. A corresponding pH adjusting agent is added to the pH adjustment tank 200 according to the acidity and alkalinity of the wastewater, and the wastewater is adjusted to neutrality through a neutralization reaction. The pH adjusting agent includes an acidic agent and an alkaline agent. For example, if the chlorine-containing wastewater is acidic, an alkaline agent needs to be added to the tank; if the chlorine-containing wastewater is alkaline, an acidic agent needs to be added to the tank. In one embodiment, the pH adjustment tank 200 includes a first adjustment tank 210 and a second adjustment tank 220. The first adjustment tank 210 is connected to the second adjustment tank 220, and the first adjustment tank 210 and the second adjustment tank 220 are both provided with a pH detection device. After the wastewater undergoes neutralization reaction in the first regulating tank 210, it enters the second regulating tank 220. The pH detection device in the second regulating tank 220 detects the acidity and alkalinity of the wastewater entering the second regulating tank 220. If the wastewater in the second regulating tank 220 is neutral, it is discharged into the first sedimentation tank 300 for further treatment. If the wastewater in the second regulating tank 220 is not neutral, it needs to be further adjusted to neutrality to prevent the wastewater from being incompletely neutralized in the first regulating tank 210 and affecting the subsequent treatment of the wastewater. In this embodiment, the chlorine-containing wastewater is acidic, and an alkaline reagent needs to be added to the pH regulating tank 200 to adjust the wastewater to neutrality. For example, the alkaline reagent is sodium hydroxide.

[0023] Furthermore, a stirring device is provided in both the first regulating tank 210 and the second regulating tank 220, which can not only prevent the wastewater in the first regulating tank 210 and the second regulating tank 220 from being unevenly mixed, resulting in incomplete neutralization, but also accelerate the reaction rate. Furthermore, in order to facilitate the addition of reagents to the pH regulating tank 200, the pH regulating tank 200 is also provided with a first feeding device for feeding the pH adjusting agent, the first feeding device includes a first silo and a second silo, the discharge port of the first silo is provided on the first regulating tank 210, and the discharge port of the second silo is provided on the second regulating tank 220.

[0024] See also Figure 1 The first sedimentation tank 300 is used to remove heavy metal ions and suspended particles in the wastewater to reduce the burden of subsequent treatment processes. In one embodiment, heavy metals and suspended particles in the wastewater are removed by adding flocculants into the first sedimentation tank 300. The flocculant can aggregate the suspended solids and colloidal particles in the wastewater into larger flocs, thereby separating them by sedimentation, and other reactions such as adsorption or chelation between the flocculant and the heavy metal ions can remove the heavy metal ions. The present application does not limit the type of flocculant. For example, the flocculant is polyacrylamide, and the amount of flocculant added is performed according to the addition standard in this field.

[0025] Furthermore, a stirring device is also provided in the first sedimentation tank 300 to accelerate the reaction rate of heavy metals and suspended particles in the water with the flocculant. Furthermore, a sand filter 800 and a clean water tank 810 are also provided between the first sedimentation tank 300 and the primary concentrator 400, and the first sedimentation tank 300, the sand filter 800, the clean water tank 810 and the primary concentrator 400 are connected in sequence. The wastewater treated in the first sedimentation tank 300 flows to the sand filter 800 for filtration to remove suspended solids, silt, microorganisms, algae and other particulate matter in the water. The clean water flowing out of the sand filter 800 is collected by the clean water tank 810 and flows to the primary concentrator 400 for concentration treatment.

[0026] See also Figure 1The main purpose of the wastewater concentration device is to concentrate the pollutants and dissolved solids in the wastewater by physical or chemical methods for further treatment or recovery. In one embodiment, the primary concentration device 400 includes an ultrafiltration device 410 and a reverse osmosis device 420 arranged in sequence. The ultrafiltration device 410 uses an ultrafiltration membrane as a filter medium, which can effectively separate and remove suspended matter, colloids, bacteria, macromolecular organic matter and other particles in the water. Under a certain pressure, when a solution containing large and small molecular solutes flows through the surface of the ultrafiltration membrane, the solvent and small molecular substances can pass through the membrane pores and be collected as permeate, while the macromolecular solutes are retained by the membrane to form a concentrated solution. The reverse osmosis device 420 uses a semipermeable membrane as a filter medium. The semipermeable membrane has tiny pores that only allow water molecules to pass through, while blocking most solutes. The water passing through the semipermeable membrane (called permeate water) is pure; while the water that does not pass through the membrane (called concentrated water) contains a higher solute concentration and can be recovered or discharged.

[0027] In this embodiment, the wastewater is filtered by the ultrafiltration device 410 and the reverse osmosis device 420 in sequence, and the clean water passing through the ultrafiltration membrane and the reverse osmosis membrane flows from the first water outlet to the reuse water storage tank 500, and the generated concentrated water is discharged to the secondary concentration device 600 through the second water outlet for further concentration. In the present application, the secondary concentration device 600 can be any device that can further concentrate the concentrated water generated by the primary concentration device 400, including but not limited to a steam concentration device, a membrane separation concentration device or a freeze concentration device and a combination of the above concentration devices. The clean water purified by the secondary concentration device 600 flows to the reuse water storage tank 500, and the concentrated water generated by the secondary concentration device 600 is discharged to the second sedimentation tank 700 for further treatment.

[0028] See also Figure 1 In one embodiment, the chlorine-containing wastewater treatment device further includes a raw water tank 510 and an emergency storage tank 520. The raw water tank 510 is connected to the reuse water storage tank 500 through a pipeline, and the emergency storage tank 520 is arranged on a branch road between the raw water tank 510 and the reuse water storage tank 500. The emergency storage tank 520, the raw water tank 510 and the reuse water storage tank 500 are connected through a three-way valve 530. In the present application, a water quality online monitoring system 501 is arranged in the reuse water storage tank 500, which is used to measure and analyze various parameters in the water body in the reuse water storage tank 500, and the various parameters in the water body include but are not limited to pH value, heavy metal content, total chlorine, suspended solid content, chemical oxygen demand, if the water in the reuse water storage tank 500 meets the composite standard, it is discharged into the raw water tank 510, if it does not meet the standard, it is discharged into the emergency storage tank 520.

[0029] See also Figure 1The second sedimentation tank 700 is provided with a chloride ion detection device for monitoring the chloride ion content. According to the measured chloride ion content, a corresponding dechlorinator is added to the second sedimentation tank 700. The dechlorinator reacts with the chloride ions to form a precipitate, thereby removing the chloride ions from the wastewater. The dechlorinator can be any reagent that can react with the chloride ions to precipitate. In one embodiment, the chloride ions are precipitated using the ultra-high lime aluminum method. The ultra-high lime aluminum method is to add calcium salts and aluminum salts to the chloride-containing solution to combine them with chloride ions to form calcium aluminum chloride Freund's salt precipitate (Ca4Al2Cl2(OH) 12 ), so that chloride ions are removed from the system, which can effectively improve the removal efficiency of chloride ions. Ca4Al2Cl2(OH) 12 It is a kind of Freund's salt. Its structure is similar to that of hydrotalcite. The structure of hydrotalcite is layered and porous. It has ion exchange properties and is widely used in adsorption and catalysis. Ca4Al2Cl2(OH) 12 It is also a layered compound consisting of positively charged [Ca2Al(OH)6] + and negatively charged Cl - When removing chlorine, calcium oxide (CaO) and sodium aluminate (NaAlO2) are added to the chlorine-containing wastewater. Calcium oxide and sodium aluminate react first to generate calcium-aluminum compound Ca2Al(OH) 14 , the main layer of the compound is [Ca2Al(OH)6] + , the interlayer anion is OH - .Ca2Al(OH) 14 Exchangeable, when Cl in solution - Entering the sandwich layer, it will interact with the interlayer anion OH - Ion exchange occurs to form Ca4Al2Cl2(OH) 12 The precipitate makes Cl - In order to prevent the chloride ions in the second sedimentation tank 700 from reacting unevenly, a stirring device may be provided inside the second sedimentation tank 700.

[0030] Furthermore, in order to facilitate the feeding of the dechlorinating agent into the second sedimentation tank 700, a second feeding device for feeding the dechlorinating agent is provided on the second sedimentation tank 700. The second feeding device includes a third silo and a fourth silo, and calcium oxide and sodium aluminate are placed in the third silo and the fourth silo respectively. For example, calcium oxide is placed in the third silo and sodium aluminate is placed in the fourth silo, or sodium aluminate is placed in the third silo and calcium oxide is placed in the fourth silo. Preferably, a heating device is also provided in the third silo and the fourth silo to ensure that the powder in the third silo and the fourth silo is in a dry state to prevent the powder in the third silo and the fourth silo from absorbing water and affecting the removal effect of chloride ions.

[0031] See also Figure 1In one embodiment, the chlorine-containing wastewater treatment device further includes a controller, which is electrically connected to the pH detection device, the first feeding device, the second feeding device, the water quality online monitoring system 501, the three-way valve 530 and the chloride ion detection device. Specifically, the pH detection device transmits the detection result to the controller, and the controller controls the first silo to feed the first regulating tank 210 and controls the second silo to feed the second regulating tank 220 according to the measured wastewater pH to achieve the adjustment of the wastewater pH. The water quality online monitoring system 501 transmits the water quality test result in the reuse water storage tank 500 to the controller. The controller determines whether the water quality is qualified according to the preset conditions. If the water quality is qualified, the three-way valve 530 is controlled to open toward one side of the raw water tank 510 and close toward one side of the emergency storage tank 520, and the water in the reuse water storage tank 500 flows into the raw water tank 510; if the water quality is unqualified, the three-way valve 530 is controlled to open toward one side of the emergency storage tank 520 and close toward one side of the raw water tank 510, and the water in the reuse water storage tank 500 flows into the emergency storage tank 520. The chloride ion detection device transmits the chloride ion content in the concentrated water produced by the secondary concentration device 600 in the second sedimentation tank 700 to the controller. According to the chloride ion content, the controller controls the third silo and the fourth silo to respectively put a dechlorinating agent into the second sedimentation tank 700 to precipitate and remove the chloride ions.

[0032] See also Figure 1 In one embodiment, the chlorine-containing wastewater treatment device also includes a sludge storage tank 900 and a desludge machine 910. A first sludge outlet is provided on the first sedimentation tank 300, and a second sludge outlet is provided on the second sedimentation tank 700. The first sludge outlet and the second sludge outlet are respectively connected to the sludge storage tank 900. The desludge machine 910 is connected to the sludge storage tank 900, and is used to separate the water in the sludge, reduce the volume and weight of the sludge, and thus facilitate transportation, disposal or further processing. The type of the desludge machine 910 is not limited in the present application. For example, the desludge machine 910 can be a plate and frame filter press or a centrifugal dehydration. In this embodiment, the desludge machine 910 uses a plate and frame filter press.

[0033] The process flow of the chlorine-containing wastewater device of the present application for treating wastewater is as follows: the wastewater storage tank 100 collects wastewater and transfers the wastewater to the pH adjustment tank 200 to be adjusted to neutral; the neutral wastewater is removed from heavy metals and suspended particles in the first sedimentation tank 300, and filtered through the sand filter 800 to remove sediment, microorganisms and other substances in the water, and then concentrated by the primary concentration device 400; the clean water produced by the primary concentration treatment is discharged into the reuse water storage tank 500, and the water quality of the reuse water storage tank 500 is tested. If the water quality meets the standard, it is discharged into the raw water tank 510, and if the water quality does not meet the standard, it is discharged into the emergency storage tank 520; the concentrated water produced by the primary concentration treatment is discharged to the secondary concentration device 600 for secondary concentration, and the clean water after the secondary concentration treatment is discharged to the reuse water storage tank 500, and the concentrated water produced by the secondary concentration treatment is discharged to the second sedimentation tank 700 for precipitation treatment of chloride ions in the water, and the clean water in the second sedimentation tank 700 flows back to the pH adjustment tank 200 through a pipeline.

[0034] The chlorine-containing wastewater treatment device of the utility model adjusts the chlorine-containing wastewater to neutrality in a pH adjustment tank to optimize precipitation reaction conditions, removes heavy metals and suspended particles in the water in a first sedimentation tank, and discharges the clean water after treatment by a primary concentration device into a reuse water storage tank for storage, and discharges the generated concentrated water into a secondary concentration device for further treatment. The clean water generated by the secondary concentration device is also discharged into the reuse water storage tank for storage, and the wastewater generated by the secondary concentration device reacts with a dechlorinating agent in a second sedimentation tank to generate precipitation to remove chloride ions in the water, and the clean water in the second sedimentation tank is discharged into a pH adjustment tank for reprocessing. The chlorine-containing wastewater treatment device of the present application combines physical treatment and chemical treatment, and forms a multi-stage treatment process through its internal circulation to achieve efficient removal of chloride ions. Therefore, the utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance.

[0035] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A chlorine-containing wastewater treatment device, characterized in that: include: A wastewater storage tank, a pH adjustment tank, a first sedimentation tank and a first-level concentration device connected in sequence; The primary concentrator is provided with a first water outlet and a second water outlet, the first water outlet is connected to the recycled water storage tank through a pipeline; the second water outlet is connected to the secondary concentrator and the second sedimentation tank in sequence through a pipeline; The secondary concentration device comprises a third water outlet and a fourth water outlet, the third water outlet is connected to the recycled water storage tank, and the fourth water outlet is connected to the second sedimentation tank; Wherein, the second sedimentation tank is a dechlorination tank, and the clean water of the second sedimentation tank flows back to the pH adjustment tank through a pipeline.

2. The chlorine-containing wastewater treatment device according to claim 1, characterized in that: The pH adjustment tank comprises a first adjustment tank and a second adjustment tank, the first adjustment tank is communicated with the second adjustment tank, and a pH detection device is disposed in the first adjustment tank and the second adjustment tank.

3. The chlorine-containing wastewater treatment device according to claim 2, characterized in that: The chlorine-containing wastewater treatment device also includes a raw water tank and an emergency storage tank. The raw water tank is connected to the recycled water storage tank through a pipeline. The emergency storage tank is arranged on a branch road between the raw water tank and the recycled water storage tank. The emergency storage tank, the raw water tank and the recycled water storage tank are connected through a three-way valve.

4. The chlorine-containing wastewater treatment device according to claim 3, characterized in that: The recycled water storage tank is provided with a water quality online monitoring system, and the second sedimentation tank is provided with a chloride ion detection device.

5. The chlorine-containing wastewater treatment device according to claim 4, characterized in that: The pH adjusting tank is provided with a first feeding device for feeding a pH adjusting agent, and the second sedimentation tank is provided with a second feeding device for feeding a dechlorinating agent.

6. The chlorine-containing wastewater treatment device according to claim 5, characterized in that: The chlorine-containing wastewater treatment device also includes a controller, which is electrically connected to the pH detection device, the water quality online monitoring system, the first feeding device, the second feeding device, the chloride ion detection device and the three-way valve respectively.

7. The chlorine-containing wastewater treatment device according to claim 1, characterized in that: The primary concentration device comprises an ultrafiltration device and a reverse osmosis device which are arranged in sequence.

8. The chlorine-containing wastewater treatment device according to claim 1, characterized in that: A sand filter is also provided between the first sedimentation tank and the first-stage concentrating device, the water inlet of the sand filter is communicated with the water outlet of the first sedimentation tank, and the water outlet of the sand filter is communicated with the water inlet of the first-stage concentrating device.

9. The chlorine-containing wastewater treatment device according to claim 1, characterized in that: The chlorine-containing wastewater treatment device also includes a sludge storage tank. The first sedimentation tank is provided with a first sludge outlet, and the second sedimentation tank is provided with a second sludge outlet. The first sludge outlet and the second sludge outlet are respectively connected to the sludge storage tank.

10. The chlorine-containing wastewater treatment device according to claim 9, characterized in that: The chlorine-containing wastewater treatment device also includes a desludging machine, and the desludging machine is connected to the sludge storage tank.

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