Novel treatment and recycling system for CNC machining cleaning wastewater
By setting up a new treatment and reuse system for CNC machining cleaning wastewater, and using multi-stage treatment units to reduce the oil content of the wastewater, the problem of low wastewater treatment efficiency in existing technologies has been solved, and stable treatment and reuse of wastewater has been achieved.
Patent Information
- Application Number
- CN202423305429.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing technologies, the cutting fluid wastewater generated by CNC machining has a high oil content and low treatment efficiency, making it difficult to meet increasingly stringent wastewater discharge standards.
The system employs a wastewater pretreatment subsystem and a comprehensive wastewater treatment subsystem, including a wastewater equalization tank, an air flotation system, a sequencing batch reactor (SBR), a comprehensive equalization tank, an air flotation system, a first reaction tank, a cleaning sedimentation tank, a pH adjustment tank, an aerobic tank, a biological sedimentation tank, an MBR membrane tank, an MBR permeate tank, a security filter, an RO system, a concentrate collection tank, a desalination reaction tank, and a concentrate sedimentation tank. Pretreatment reduces oil content and stabilizes water quality.
It effectively reduces the oil content in wastewater, decreases the load on the MBR membrane tank, ensures stable wastewater quality, and meets discharge standards.
Smart Images
Figure CN223804983U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wastewater treatment technical field, concretely relates to a novel processing and recycling system of CNC machining cleaning wastewater. BACKGROUND
[0002] At present, a large amount of industry, cutting fluid wastewater is produced in the process of CNC machining and finishing, and the conventional method is to collect, remove oil, deposit, filter and a series of processes, but the above method has high oil content and low efficiency, which is difficult to meet the increasingly stringent wastewater discharge standard. SUMMARY
[0003] In order to overcome the shortcomings and deficiencies in the prior art, the utility model aims at providing a novel processing and recycling system of CNC machining cleaning wastewater, which adopts classification collection, and corresponding pretreatment for special wastewater, so as to reduce the load of subsequent wastewater treatment process and improve the processing efficiency.
[0004] The utility model is realized through the following technical schemes:
[0005] A novel processing and recycling system of CNC machining cleaning wastewater, comprising a wastewater pretreatment subsystem and a comprehensive wastewater treatment subsystem; the wastewater pretreatment subsystem comprises a wastewater conditioning tank, a flotation system, a sequencing batch reactor and a comprehensive conditioning tank connected in sequence; the comprehensive wastewater treatment subsystem comprises a comprehensive conditioning tank, a flotation system, a first reaction tank, a cleaning sedimentation tank, a PH adjustment tank, an aerobic tank, a biochemical sedimentation tank, an MBR membrane tank, an MBR water tank, a security filter, an RO system, a concentrated water collection tank, a desalination reaction tank and a concentrated water sedimentation tank connected in sequence.
[0006] Among them, the novel processing and recycling system further comprises a sludge treatment subsystem, and the sludge treatment subsystem comprises a sludge concentration tank and a filter press connected in sequence;
[0007] The sequencing batch reactor, the cleaning sedimentation tank, the biochemical sedimentation tank and the concentrated water sedimentation tank are all provided with a sludge outlet, the sludge concentration tank is provided with a sludge inlet, and the sludge outlets of the sequencing batch reactor, the cleaning sedimentation tank, the biochemical sedimentation tank and the concentrated water sedimentation tank are connected with the sludge inlet of the sludge concentration tank.
[0008] Among them, the flotation system is provided with a flotation residue outlet, and the flotation residue outlet is connected with the sludge inlet of the sludge concentration tank.
[0009] Among them, the RO system is provided with a concentrated water outlet and a fresh water outlet, and the concentrated water outlet of the RO system is connected with the concentrated water collection tank;
[0010] The novel treatment and recycling system further comprises a recycling water tank, which is provided with a fresh water inlet, and the fresh water inlet of the recycling water tank is connected with the fresh water outlet of the RO system.
[0011] The first reaction tank comprises, in sequence, a demulsifier reaction tank, a PAC reaction tank, an alkali solution reaction tank and a PAM reaction tank.
[0012] The second reaction tank comprises, in sequence, an acid solution reaction tank, an alkali solution reaction tank, a PAC reaction tank, a lime reaction tank and a PAM reaction tank.
[0013] The novel treatment and recycling system for CNC machining cleaning wastewater has the following beneficial effects:
[0014] The novel treatment and recycling system for CNC machining cleaning wastewater has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS
[0015] The utility model makes further explanation to the utility model with the drawings, but the embodiment in the drawings does not constitute any limitation to the utility model, and other drawings can be obtained according to the following drawings without the premise of creative labor for the ordinary skill in the art.
[0016] Figure 1 The connection block diagram of the utility model. DETAILED DESCRIPTION
[0017] In order to make the above purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific implementation of the utility model is described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the utility model. But the utility model can be implemented in many other ways different from the description herein, and the person skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the following disclosed specific embodiments.
[0018] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one feature. In the description of the utility model, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.
[0019] At present, a large amount of industry, cutting fluid wastewater will be generated in the process of CNC machining and finishing. The conventional method is to collect, remove oil, precipitate, filter and a series of processes, but the above method has high oil content and low efficiency, which is difficult to meet the increasingly stringent wastewater discharge standard.
[0020] To solve the above problems, the embodiment discloses a new type of processing and recycling system for CNC machining cleaning wastewater, and the connection diagram can refer to Figure 1 The system comprises a wastewater pretreatment subsystem and a comprehensive wastewater treatment subsystem; the wastewater pretreatment subsystem comprises a wastewater conditioning tank, an air flotation system, a sequencing batch reactor and a comprehensive conditioning tank connected in sequence; the comprehensive wastewater treatment subsystem comprises a comprehensive conditioning tank, an air flotation system, a first reaction tank, a cleaning sedimentation tank, a PH readjustment tank, an aerobic tank, a biochemical sedimentation tank, an MBR membrane tank, an MBR water tank, a security filter, an RO system, a concentrated water collection tank, a desalination reaction tank and a concentrated water sedimentation tank connected in sequence.
[0021] In the embodiment, the new type of processing and recycling system further comprises a sludge treatment subsystem, and the sludge treatment subsystem comprises a sludge concentration tank and a filter press connected in sequence; the sequencing batch reactor, the cleaning sedimentation tank, the biochemical sedimentation tank and the concentrated water sedimentation tank are all provided with a sludge outlet, the sludge concentration tank is provided with a sludge inlet, and the sludge outlets of the sequencing batch reactor, the cleaning sedimentation tank, the biochemical sedimentation tank and the concentrated water sedimentation tank are connected with the sludge inlet of the sludge concentration tank. After the sludge is converged to the sludge treatment subsystem, it is uniformly dewatered, and the filtrate is returned to the wastewater conditioning tank.
[0022] Further, the air flotation system is provided with an air flotation residue outlet connected with the sludge inlet of the sludge concentration tank.
[0023] Specifically, the RO system is provided with a concentrated water outlet and a fresh water outlet, the concentrated water outlet of the RO system is connected with the concentrated water collection tank; the new type of processing and recycling system further comprises a recycled water tank, and the recycled water tank is provided with a fresh water inlet connected with the fresh water outlet of the RO system. In the embodiment, the RO system performs desalination reaction, and the RO concentrated water is collected into the recycled water tank through the fresh water outlet after treatment, which can be recycled by the enterprise.
[0024] Specifically, the first reaction tank comprises a demulsifier reaction tank, a PAC reaction tank and an alkali and PAM reaction tank connected in sequence. The wastewater in the comprehensive conditioning tank is pumped to the air flotation system for oil removal again, and the air flotation effluent enters the demulsifier reaction tank and adds demulsifier for demulsification again; after demulsification, the wastewater enters the PAC reaction tank and adds PAC reagent for reaction; then enters the alkali and PAM reaction tank for reaction, so that the precipitate coagulates and flocculates into larger alum flowers, and then enters the cleaning sedimentation tank for mud-water separation.
[0025] Specifically, the second reaction tank includes acid liquid reaction tank, alkali liquid reaction tank, PAC reaction tank, lime reaction tank and PAM reaction tank connected in sequence. In the embodiment, the concentrated water separated by the RO system enters the concentrated water collecting tank, and then enters the discharge water tank through the effluent of the acid liquid reaction tank, the alkali liquid reaction tank, the PAC reaction tank, the lime reaction tank and the PAM reaction tank, and is discharged.
[0026] In summary, the novel processing and recycling system of CNC machining cleaning wastewater in the embodiment, by setting the wastewater pretreatment subsystem and the comprehensive wastewater treatment subsystem, the high-concentration oily wastewater is pretreated separately by the wastewater pretreatment subsystem, which can effectively reduce the oil content of the wastewater. In addition, by setting the biochemical sedimentation tank, the MBR membrane tank load is effectively reduced, and the long-term stability of the wastewater treatment water quality is ensured.
[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited to the scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the present application.
Claims
1. A novel treatment and re-use system for CNC machining cleaning wastewater, characterized in that, The new treatment and recycling system comprises a wastewater pretreatment subsystem and a comprehensive wastewater treatment subsystem. The wastewater pretreatment subsystem comprises a wastewater conditioning tank, an air flotation system, a sequencing batch reactor and a comprehensive conditioning tank connected in sequence. The comprehensive wastewater treatment subsystem comprises a comprehensive conditioning tank, an air flotation system, a first reaction tank, a cleaning sedimentation tank, a PH readjustment tank, an aerobic tank, a biochemical sedimentation tank, an MBR membrane tank, an MBR water production tank, a security filter, an RO system, a concentrated water collection tank, a desalination reaction tank and a concentrated water sedimentation tank connected in sequence.
2. A novel treatment and recycling system for CNC machining cleaning wastewater as claimed in claim 1, wherein, The new treatment and recycling system further comprises a sludge treatment subsystem comprising a sludge concentration tank and a filter press connected in sequence. The sequencing batch reactor, the cleaning sedimentation tank, the biochemical sedimentation tank and the concentrated water sedimentation tank are each provided with a sludge outlet, and the sludge concentration tank is provided with a sludge inlet, and the sludge outlets of the sequencing batch reactor, the cleaning sedimentation tank, the biochemical sedimentation tank and the concentrated water sedimentation tank are connected to the sludge inlet of the sludge concentration tank.
3. A novel treatment and recycling system of CNC machining cleaning wastewater according to claim 2, characterized in that, The air flotation system is provided with an air flotation residue outlet connected to the sludge inlet of the sludge concentration tank.
4. A novel treatment and recycling system of CNC machining cleaning wastewater according to claim 1, characterized in that, The RO system is provided with a concentrated water outlet and a fresh water outlet, and the concentrated water outlet of the RO system is connected to the concentrated water collection tank. The new treatment and recycling system further comprises a recycled water tank provided with a fresh water inlet connected to the fresh water outlet of the RO system.
5. A novel treatment and recycling system of CNC machining cleaning wastewater according to claim 1, characterized in that, The first reaction tank comprises a demulsifier reaction tank, a PAC reaction tank and an alkali and PAM reaction tank connected in sequence.
6. A novel treatment and recycling system of CNC machining cleaning wastewater according to claim 1, characterized in that, The desalination reaction tank comprises an acid reaction tank, an alkali reaction tank, a PAC reaction tank, a lime reaction tank and a PAM reaction tank connected in sequence.