CN204162580U - A kind of MBR-NF system to the waste water advanced decolouring of brewed spirit and purification - Google Patents

Abstract

The utility model relates to an MBR-NF system for deep decolorization and purification of liquor brewing wastewater, comprising an MBR membrane unit, a self-priming pump, an intermediate water tank, a pressurized pump, a security filter, a nanofiltration membrane unit and a cleaning agent preparation water tank; The MBR membrane unit is immersed in the mixed liquid at the end of the biochemical reaction tank of the original system, and the MBR membrane unit is connected to the intermediate water tank through a self-priming pump; the intermediate water tank and the cleaning agent preparation water tank are connected to the nanofiltration membrane unit through a booster pump and a security filter; nanofiltration The membrane unit is connected with the biochemical reaction pool of the original system. The utility model has the advantages of modular design, flexible layout, small occupied area, low operating cost, and can be easily connected to the existing wastewater biological treatment system, which is of great significance for the upgrading and transformation of the existing liquor wastewater treatment.

Description

A MBR-NF system for deep decolorization and purification of liquor brewing wastewater

technical field

The utility model relates to an advanced treatment integrated system of liquor brewing wastewater, which is mainly used for deep decolorization and further purification of the rear section of the liquor brewing wastewater biochemical treatment system.

Background technique

In the brewing process of Maotai-flavored liquor, due to the repeated fermentation and distillation, the discharged wastewater has a higher chroma. After the oxygen treatment, the effluent still has a certain chroma, and it is difficult to reach less than 20 times the stipulation in Table 3 of the "Discharge Standard of Water Pollutants for Fermented Alcohol and Liquor Industry" (GB 27631-2011), and sometimes even 40 times the stipulation in Table 2. not reachable. Decolorization is a long-standing and difficult problem in the treatment of Maotai-flavor liquor wastewater. After testing, commonly used decolorization treatment processes include oxidation (such as ozone, Fenton's reagent, hydrogen peroxide), reduction (sodium sodium sulfite, ferrous sulfate, etc.), coagulation (organic or non-polymer decolorizing agent, composite decolorizing agent) can not achieve the ideal decolorization effect, activated carbon adsorption has a certain decolorization effect, in the early stage of liquor production, when the chroma of wastewater is low, the chroma can generally be treated to less than 20 times, in the later stage of liquor production, the chroma of wastewater discharged When it is darker, it is difficult to stabilize the chromaticity below 20 times, and it has the disadvantages of easy saturation, high cost, and difficulty in regeneration, making it difficult for engineering application.

Utility model content

The technical problem to be solved by the utility model is to provide a device for decolorizing and removing organic matter by using membrane separation to retain the color components in liquor wastewater, so that the chromaticity of the effluent is not more than 2 times, which is far lower than that of "fermented alcohol and liquor" Industrial Water Pollutant Discharge Standards (GB 27631-2011) Table 3 20 times the limit; chemical oxygen demand (CODcr) also reached the "Fermented Alcohol and Liquor Industrial Water Pollutant Discharge Standards" (GB 27631-2011) table 3 Limits specified.

The technical scheme adopted by the utility model to solve the above technical problems is a MBR-NF system for deep decolorization and purification of liquor brewing wastewater, including MBR membrane unit, self-priming pump, intermediate water tank, booster pump, security filter, Nanofiltration membrane unit and cleaning agent preparation water tank;

The MBR membrane unit is immersed in the final mixed solution of the biochemical reaction tank of the original system, and the MBR membrane unit is connected with the intermediate water tank through a self-priming pump, and the clear water passing through the MBR membrane unit is sucked into the intermediate water tank, so that the original system biochemical reaction tank The suspended activated sludge in the mixed liquor is intercepted;

The intermediate water tank is connected to the nanofiltration membrane unit through a pressurized pump and a security filter, so that the clear water stored in the intermediate water tank passes through the security filter and the nanofiltration membrane unit, and the particles with color development above 0.5 nanometers in the water are retained. Obtain clear water with a chromaticity of no more than 2 times and concentrated water with a relatively high chromaticity;

The nanofiltration membrane unit is connected to the biochemical reaction tank of the original system, and the concentrated water with relatively high chroma retained in the nanofiltration membrane unit is returned to the biochemical reaction tank of the original system for further processing;

The cleaning agent preparation water tank is connected to the nanofiltration membrane unit through the booster pump and the security filter, so that the cleaning agent enters the nanofiltration membrane unit for cleaning after passing through the booster pump and the security filter.

The operation of the MBR-NF system is controlled by a programmable controller and equipped with an HMI touch screen operation unit.

Further, the microfiltration membrane or ultrafiltration membrane used in the MBR membrane unit has a pore size of 0.1-0.4 microns; the security filter uses a filter element of 1-5 microns; the nanofiltration membrane unit used in the nanofiltration The pore size of the filter membrane is 0.5-5 nanometers.

The utility model has the following advantages:

(1) The microfiltration membrane or ultrafiltration membrane used in the MBR membrane unit has a pore size of 0.1-0.4 microns, which can effectively intercept activated sludge, increase the concentration of activated sludge in the aerobic system, and prolong the residence time of activated sludge, which is conducive to strengthening The function of biological decolorization of the system; the clear water obtained by using the membrane-bioreactor has a turbidity of less than 1NTU, which meets the water inlet requirements of the subsequent membrane filtration unit, and can be directly membrane filtered.

(2) The security filter uses a filter element of 1-5 microns, which can be used as a pretreatment and protection device for the nanofiltration membrane unit in the latter stage.

(3) The pore size of the nanofiltration membrane used in the nanofiltration membrane unit is 0.5-5 nanometers, which can ensure the effective interception of the color components in the wastewater, and obtain clear water with a chromaticity of no more than 2 times and a relatively high chromaticity. water.

(4) PLC control is adopted to automatically control the operation of each equipment, automatically adjust the operating pressure of the nanofiltration membrane unit, and is equipped with an HMI touch screen, which is simple and intuitive to operate.

(5) The entire system can adopt modular design, flexible layout, small footprint, low operating costs, and it is very convenient to connect to the existing wastewater biological treatment system, which is of great significance for the upgrading and transformation of the existing liquor wastewater treatment .

Description of drawings

Fig. 1 is a schematic diagram of the composition and structure of the MBR-NF system described in the present invention.

Figure 2 is a schematic diagram of the composition of the MBR membrane unit.

Figure 3 is a schematic diagram of the composition of the nanofiltration membrane unit.

FIG. 4 is a schematic diagram of the composition of the MBR-NF system applicable in Embodiment 1.

FIG. 5 is a schematic diagram of the composition of the MBR-NF system applicable in Embodiment 2.

Wherein, reference signs are: 01, MBR membrane unit; 02, self-priming pump; 03, intermediate water tank; 04, booster pump; 05, security filter; 06, nanofiltration membrane unit; 07, cleaning agent preparation water tank; 08. Color HMI touch screen; 09. Pagoda-shaped adapter; 10. PE plastic pipe; 11. MBR membrane module; 12. MBR outlet pipe; 13. Flushing air pipe; S-14. Pressure monitor; S-15. Nano Membrane element; S-16, regulating valve; S-17, solenoid valve; S-18, flow meter.

Detailed ways

Example 1:

Treated water volume: 1m ³ /h

The MBR-NF system consists of 3 modules:

(1) MBR module: composed of MBR membrane unit 01 with a processing capacity of 1.5m ³ /h, self-priming pump 02 and supporting pipelines, valves, instruments and control boxes, placed in the original aerobic pool; MBR module size: length 800mm , width 700mm, height 1500mm;

(2) Nanofiltration module: It is composed of booster pump 04, security filter 05, nanofiltration membrane unit 06 and supporting pipeline valves and control box. The overall dimensions are: length 1200mm, width 600mm, height 1700mm. The front of the module is inlaid with a 10-inch HMI touch screen 08;

(3) Water tank module: It is composed of the intermediate water tank 03 and the cleaning agent preparation water tank 07. Each effective volume is 1500L.

The raw water after A/O treatment enters the MBR membrane unit 01, and is sucked by the self-priming pump 02. The activated sludge in the mixed solution of the aerobic tank is intercepted by the MBR membrane, and the clear water that passes through the MBR is sucked into the intermediate water tank 03 , and then transported to the nanofiltration module through the booster pump 04, firstly through the security filter 05 for preliminary filtration, and then through the nanofiltration membrane unit 06 for membrane separation, in which particles above 0.5 nanometers, including color components and other particles, are collected The filter membrane intercepts and forms concentrated water and then returns to the original A/O system for further processing; the clear water passing through the nanofiltration membrane is close to colorless and transparent, and the chromaticity does not exceed 2 times, which is far lower than the "Discharge Standard of Water Pollutants for Fermented Alcohol and Liquor Industry" "(GB 27631-2011) 20 times the limit specified in Table 3.

The device used in Embodiment 1: the installed power is 1.3KW, and the components of the device are shown in Table 1. The schematic diagram of the connection structure of each component of the device is shown in Figure 4.

Table 1: Device Composition

The treatment effect of Example 1 on wastewater is shown in Table 2.

Table 2: Decolorization effect of MBR+NF

water sample pH COD _Cr (mg/l) Chroma (dilution factor) A/O outlet 7.40 160 64 MBR outlet 7.60 158 32 Nanofiltration effluent 7.50 45 2

Example 2:

Treated water volume: 2.5m ³ /h

The device consists of 3 modules:

(1) MBR module: composed of MBR membrane unit 01 with a processing capacity of 4.5m ³ /h, self-priming pump 02, supporting pipelines, valves, instruments, and control box, placed in the original aerobic pool; MBR module size: length 1500mm , 700mm wide and 1500mm high.

(2) Nanofiltration module: It is composed of booster pump 04, security filter 05, nanofiltration membrane unit 06 and supporting pipeline valves and control box. The overall dimensions are: length 1800mm, width 700mm, height 1500mm. The front of the module is inlaid with a 10-inch HMI touch screen 08; the nanofiltration membrane element adopts Dow nanofiltration membrane NF270-400, 3 pieces.

(3) Water tank module: It is composed of the intermediate water tank 03 and the cleaning agent preparation water tank 07. Each effective volume is 2000L.

The raw water after A/O treatment enters the MBR membrane unit 01, and is sucked by the self-priming pump 02. The activated sludge in the mixed solution of the aerobic tank is intercepted by the MBR membrane, and the clear water that passes through the MBR is sucked into the intermediate water tank 03 , and then transported to the nanofiltration module through the booster pump 04, firstly through the security filter 05 for preliminary filtration, and then through the nanofiltration membrane unit 06 for membrane separation, in which particles above 0.5 nanometers, including color components and other particles, are collected The filter membrane intercepts and forms concentrated water and then returns to the original A/O system for further processing; the clear water passing through the nanofiltration membrane is close to colorless and transparent, and the chromaticity does not exceed 2 times, which is far lower than the "Discharge Standard of Water Pollutants for Fermented Alcohol and Liquor Industry" "(GB 27631-2011) 20 times the limit specified in Table 3.

The device used in embodiment 2: the installed power is 3KW, and the components of the device are shown in Table 3. The schematic diagram of the connection structure of each component of the device is shown in Figure 5.

Table 3: MBR+UF device

The treatment effect of Example 2 on wastewater is shown in Table 4.

Table 4: Treatment Effects

water sample pH COD _Cr (mg/l) Chroma (dilution factor) A/O system water outlet 7.30 120 32 MBR module outlet 7.50 116 32 Nanofiltration module outlet water 7.40 35 2

Claims (3)

1. An MBR-NF system for deep decolorization and purification of liquor brewing wastewater, characterized in that it includes MBR membrane unit, self-priming pump, intermediate water tank, booster pump, security filter, nanofiltration membrane unit and cleaning agent preparation water tank; The MBR membrane unit is immersed in the final mixed solution of the biochemical reaction tank of the original system, and the MBR membrane unit is connected with the intermediate water tank through a self-priming pump, and the clear water passing through the MBR membrane unit is sucked into the intermediate water tank, so that the original system biochemical reaction tank The suspended activated sludge in the mixed liquor is intercepted; The intermediate water tank is connected to the nanofiltration membrane unit through a pressurized pump and a security filter, so that the clear water stored in the intermediate water tank passes through the security filter and the nanofiltration membrane unit, and the particles with color development above 0.5 nanometers in the water are retained. Obtain clear water with a chromaticity of no more than 2 times and concentrated water with a relatively high chromaticity; The nanofiltration membrane unit is connected to the biochemical reaction tank of the original system, and the concentrated water with relatively high chroma retained in the nanofiltration membrane unit is returned to the biochemical reaction tank of the original system for further processing; The cleaning agent preparation water tank is connected to the nanofiltration membrane unit through the booster pump and the security filter, so that the cleaning agent enters the nanofiltration membrane unit for cleaning after passing through the booster pump and the security filter. 2. The MBR-NF system for deep decolorization and purification of liquor brewing wastewater according to claim 1, wherein the MBR-NF system is controlled by a programmable controller and equipped with an HMI touch screen operation unit. 3. The MBR-NF system for deep decolorization and purification of liquor brewing wastewater according to claim 1, wherein the pore diameter of the microfiltration membrane or ultrafiltration membrane used in the MBR membrane unit is 0.1-0.4 microns; The security filter uses a 1-5 micron filter element; the nanofiltration membrane unit uses a nanofiltration membrane with a pore size of 0.5-5 nanometers.