Cord production sewage treatment system

Abstract

The utility model discloses a cotton rope production sewage treatment system which comprises a pretreatment system and a deep treatment system, the pretreatment system comprises a sedimentation tank, an outlet of the sedimentation tank is connected to a first-stage stirring barrel, a water outlet of the first-stage stirring barrel is connected to a first-stage flocculation tank, a water outlet of the first-stage flocculation tank is connected to a first-stage reaction tank, and a sludge outlet of the first-stage reaction tank is connected to a plate-and-frame filter press; the deep treatment system comprises a second-stage stirring barrel, a water outlet of the second-stage stirring barrel is connected to a solidification tank, a water outlet of the solidification tank is connected to a second-stage flocculation tank, a water outlet of the second-stage flocculation tank is connected to a second-stage reaction tank, a water outlet of the second-stage reaction tank is connected to a Fenton reaction tank, and a water outlet of the Fenton reaction tank is communicated to a drainage tank; and a water outlet of the primary reaction tank is connected to the secondary mixing drum. The system is favorable for accelerating the biochemical reaction of sewage treatment, the sewage treatment time is saved, the period is shortened to 3-5 days, and the BOD and COD contents in the treated sewage are reduced by 20-30% compared with the prior art.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a wastewater treatment system for rope production. Background Technology

[0002] Wastewater generated during rope production contains various pollutants, such as fibers, adhesives, and oils. Direct discharge of these pollutants without treatment will cause serious environmental pollution. Currently, the treatment method for wastewater from rope production is as follows: ① Wastewater from the rope workshop is discharged into an equalization tank to adjust the water quality and quantity, then into a coagulation reaction tank. Alkali is added to adjust the pH value of the wastewater to between 7.5 and 8.5, and PAC is added before it enters the flocculation reaction tank; ② PAM is added to the flocculation reaction tank to precipitate flocs; ③ The effluent from the flocculation reaction tank enters a primary sedimentation tank through a central cylinder for solid-liquid separation. The supernatant flows by gravity into the Fenton reaction tank, and the sludge at the bottom of the sedimentation tank is discharged to the sludge tank via a pneumatic sludge discharge valve; ④ The supernatant from the primary sedimentation tank flows by gravity... The wastewater enters the first-stage reaction tank of the Fenton reactor, where sulfuric acid and ferrous sulfate are added to adjust the pH to around 3; ⑤ The wastewater flows by gravity into the second-stage reaction tank, where hydrogen peroxide is added, and after reaction, it flows by gravity into the third-stage reaction tank; ⑥ Sodium hydroxide is added to the third-stage reaction tank, and aeration is used to remove excess hydrogen peroxide; ⑦ After PAM is added to the fourth-stage reaction tank, the wastewater enters the subsequent sedimentation tank for sedimentation; ⑧ The effluent from the sedimentation tank flows by gravity into the clear water tank and is pumped into the existing wastewater treatment system by a lift pump; ⑨ The sludge from the second-stage sedimentation tank is discharged to the sludge tank by a pneumatic sludge discharge valve, and after being treated by a plate and frame filter press, it is transported off-site.

[0003] The current wastewater treatment method typically takes 7-10 days, which is a long time and affects normal production. Furthermore, the treated wastewater still has high levels of BOD and COD, resulting in unsatisfactory performance. A new wastewater treatment system is urgently needed to solve these technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a wastewater treatment system for rope production to overcome the aforementioned technical problems.

[0005] The technical solution adopted by this utility model is a wastewater treatment system for rope production, including a pretreatment system and a deep treatment system;

[0006] The aforementioned pretreatment system includes: a sedimentation tank, the sedimentation tank outlet connected to the inlet of a primary mixing drum via a pipeline, the primary mixing drum outlet connected to a primary flocculation tank via a pipeline, the primary flocculation tank outlet connected to a primary reaction tank via a pipeline, and the primary reaction tank sludge outlet connected to a plate and frame filter press via a pipeline.

[0007] The aforementioned deep treatment system includes: a secondary mixing drum, the outlet of which is connected to a coagulation tank via a pipeline, the outlet of which is connected to a secondary flocculation tank via a pipeline, the outlet of which is connected to a secondary reaction tank via a pipeline, the outlet of which is connected to a Fenton reaction tank via a pipeline, and the outlet of which is connected to a drainage tank.

[0008] The outlet of the primary reaction tank is connected to the secondary mixing tank via a pipe.

[0009] Preferably, at least two primary mixing drums are provided, and the pipes of the sedimentation tank outlet are respectively connected to the two primary mixing drums, and the outlets of the two primary mixing drums are respectively connected to the primary flocculation tank.

[0010] Preferably, the above-mentioned primary mixing drum is provided with a number of water taps at vertical intervals, and the number of water taps are arranged alternately.

[0011] Preferably, the outlet of the plate and frame filter press is connected to the primary flocculation tank via a pipeline.

[0012] Preferably, the aforementioned primary mixing drum is also connected to a filter tank via a pipeline, with a pneumatic sludge discharge valve at the pipeline end. The outlet of the filter tank is connected to the primary flocculation tank, and the sludge outlet of the filter tank is connected to a plate and frame filter press.

[0013] Compared with the prior art, the beneficial effects of this utility model are that the wastewater treatment system for rope production provided by this utility model removes large particles of sediment through pretreatment and quickly separates cement, which is conducive to the further removal of small particles in the water by subsequent deep treatment. The whole process helps to accelerate the biochemical reaction of wastewater treatment, save wastewater treatment time, shorten the cycle to 3-5 days, and the BOD and COD content in the treated wastewater is reduced by 20-30% compared with the prior art, resulting in better treatment effect. Attached Figure Description

[0014] Figure 1 Schematic diagram of wastewater treatment system layout for rope production;

[0015] Figure 2 This is a front view of the mixing tank. Detailed Implementation

[0016] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0017] Example 1

[0018] like Figure 1-2 As shown, a wastewater treatment system for rope production includes a pretreatment system 100 and a deep treatment system 200.

[0019] The aforementioned pretreatment system 100 includes a sedimentation tank 101. The outlet of the sedimentation tank 101 is connected to the inlet of a primary mixing drum 102 via a pipeline. The outlet of the primary mixing drum 102 is connected to a primary flocculation tank 103 via a pipeline. The outlet of the primary flocculation tank 103 is connected to a primary reaction tank 104 via a pipeline. The sludge outlet of the primary reaction tank 104 is connected to a plate and frame filter press 105 via a pipeline. The outlet of the plate and frame filter press 105 is connected to the primary flocculation tank 103 via a pipeline. The water obtained from the filter press is further processed, and the sludge generated by the plate and frame filter press 105 is transported off-site. At least two primary mixing drums 102 are provided as backups to ensure sufficient sedimentation time. The pipelines from the outlet of the sedimentation tank 101 are respectively connected to the two primary mixing drums 102, and the outlets of the two primary mixing drums 102 are respectively connected to the primary flocculation tank 103.

[0020] To facilitate sampling and testing, and to determine the depth of clear water, the above-mentioned primary mixing drum 102 is vertically spaced with several water taps 1021, and several water taps 121 are arranged alternately.

[0021] Because a lot of sediment is generated in the primary mixing drum 102, the primary mixing drum 102 is also connected to the filter tank 106 through a pipe. The pipe head is equipped with a pneumatic sludge discharge valve to discharge the sediment. The outlet of the filter tank 106 is connected to the primary flocculation tank 103, and the sludge outlet of the filter tank 106 is connected to the plate and frame filter press 105 to directly squeeze the sludge.

[0022] The aforementioned deep treatment system 200 includes: a secondary mixing tank 201, the outlet of the secondary mixing tank 201 being connected to a coagulation tank 202 via a pipe, the outlet of the coagulation tank 202 being connected to a secondary flocculation tank 203 via a pipe, the outlet of the secondary flocculation tank 203 being connected to a secondary reaction tank 204 via a pipe, the outlet of the secondary reaction tank 204 being connected to a Fenton reaction tank 205 via a pipe, and the outlet of the Fenton reaction tank 205 being connected to a drainage tank 206.

[0023] The outlet of the primary reaction tank 100 is connected to the secondary mixing drum 201 via a pipeline to further treat the pretreated wastewater.

[0024] Wastewater treatment process in rope production: Wastewater in the workshop is pumped to sedimentation tank 101 for sedimentation, then pumped into primary mixing drum 102, where chemical reaction (polyferric sulfate) is added and stirred. After sedimentation and stratification, the water is pumped into primary flocculation tank 103, where PAM is added for flocculation, and then enters primary reaction tank 104, where NaOH is added for neutralization. The clear water after reaction enters secondary mixing drum 201, and the sludge is discharged to plate and frame filter press 105 for pressing to obtain sludge and water.

[0025] The water is stirred by adding chemical reaction (polyferric sulfate) in the secondary mixing tank 201, pumped into the coagulation tank 202, added with PAC for coagulation, then enters the secondary flocculation tank 203 for PAM flocculation, then discharged to the secondary reaction tank 204 for NaOH neutralization, and finally discharged to the Fenton reaction tank 205 for hydrogen peroxide reaction. After the sewage treatment is completed, it is discharged into the drainage tank 206 and discharged in compliance with standards.

[0026] The wastewater treatment system for rope production provided by this utility model removes large particles of sediment and quickly separates cement after pretreatment, which is beneficial for subsequent deep treatment to further remove small particles in the water. The whole process helps to accelerate the biochemical reaction of wastewater treatment, saves wastewater treatment time, shortens the cycle to 3-5 days, and reduces the BOD and COD content in the treated wastewater by 20-30% compared with the existing technology, resulting in better treatment effect.

[0027] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A wastewater treatment system for rope production, characterized in that, It includes a preprocessing system (100) and a deep processing system (200); The pretreatment system (100) includes: a sedimentation tank (101), the outlet of which is connected to the inlet of a primary mixing drum (102) via a pipe, the outlet of the primary mixing drum (102) via a pipe, the outlet of the primary mixing drum (102) via a pipe, the outlet of the primary flocculation tank (103) via a pipe, the outlet of the primary flocculation tank (103) via a pipe, and the sludge outlet of the primary reaction tank (104) via a pipe, which is connected to a plate and frame filter press (105). The deep treatment system (200) includes: a secondary stirring tank (201), the outlet of the secondary stirring tank (201) is connected to a coagulation tank (202) through a pipe, the outlet of the coagulation tank (202) is connected to a secondary flocculation tank (203) through a pipe, the outlet of the secondary flocculation tank (203) is connected to a secondary reaction tank (204) through a pipe, the outlet of the secondary reaction tank (204) is connected to a Fenton reaction tank (205) through a pipe, and the outlet of the Fenton reaction tank (205) is connected to a drainage tank (206). The outlet of the primary reaction tank (104) is connected to the secondary stirring tank (201) via a pipe.

2. The wastewater treatment system for rope production according to claim 1, characterized in that, At least two primary mixing drums (102) are provided. The pipes of the outlet of the sedimentation tank (101) are respectively connected to the two primary mixing drums (102), and the outlets of the two primary mixing drums (102) are respectively connected to the primary flocculation tank (103).

3. The wastewater treatment system for rope production according to claim 2, characterized in that, The primary mixing drum (102) is vertically spaced with several water taps (1021), which are arranged alternately.

4. The wastewater treatment system for rope production according to claim 1, characterized in that, The outlet of the plate and frame filter press (105) is connected to the primary flocculation tank (103) via a pipeline.

5. A wastewater treatment system for rope production according to claim 1, characterized in that, The primary mixing drum (102) is also connected to the filter tank (106) via a pipeline. A pneumatic sludge discharge valve is provided at the head of the pipeline. The outlet of the filter tank (106) is connected to the primary flocculation tank (103), and the sludge outlet of the filter tank (106) is connected to the plate and frame filter press (105).

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