CN207861946U - A kind of dyeing waste water pretreatment unit - Google Patents

Abstract

The utility model discloses a printing and dyeing wastewater pretreatment device. The tank body consists of a filter system, an adsorption system and a water collection system in sequence from top to bottom. The tank body is divided into three parts: a filter box, an adsorption box and a water collection box. The rotating shaft is driven by a motor installed on the top of the tank. The length of the rotating shaft includes two parts, one part is located in the filtration system and the other part is located in the adsorption system, and the two parts can be rotated simultaneously or separately; printing and dyeing wastewater from The water inlet enters the tank, enters the sedimentation tank through the filtration system and the adsorption system, and after sedimentation and filtration by the second filter in the sedimentation tank, it enters the other side of the second filter from the outlet of the sedimentation tank, and then flows out through the water outlet Outside the tank. The utility model uses grapefruit peel adsorbent as an adsorption layer in the pretreatment process of printing and dyeing wastewater, has strong adsorption to dyes and oily substances, and can effectively prevent oily substances from entering the printing and dyeing wastewater treatment system.

Description

A printing and dyeing wastewater pretreatment device

technical field

The utility model belongs to the technical field of wastewater treatment, in particular to a printing and dyeing wastewater pretreatment device.

Background technique

Grapefruit peel accounts for about 50% of the total grapefruit. The white flocs in it have a loose and porous structure, large pore size, and high cellulose content. Theoretically, they can absorb dyes and oils in printing and dyeing wastewater. Studies have shown that grapefruit peel has a strong adsorption effect on dyes and oils in printing and dyeing wastewater. Under suitable conditions, the removal efficiency of grapefruit peel on dyes can reach 85%, and the removal rate of Victoria Blue B can reach 95%. The adsorption capacity of all oil substances is more than 13 times.

The discharge of printing and dyeing wastewater from the textile printing and dyeing industry is large, accounting for about 11% of the national wastewater discharge, and the content of organic pollutants is high, the color is deep, the content of oil is high, and the biodegradability is poor. These characteristics make the treatment process require high Treatment cost and cumbersome treatment process, in order to improve the water quality and quantity of wastewater, remove suspended solids and settleable impurities, and improve the overall effect of wastewater treatment, pretreatment steps are required before treating printing and dyeing wastewater. The current pretreatment of printing and dyeing wastewater in my country includes grid filtration, pH adjustment, and uniform water quality. Dyes and oily substances. In order to overcome the limitations of the prior art, the utility model provides a printing and dyeing wastewater pretreatment device, which absorbs dyes and oils in the printing and dyeing wastewater by physical methods, so as to reduce the pressure of subsequent advanced treatment.

Utility model content

The utility model provides a printing and dyeing wastewater pretreatment device, which rationally utilizes the adsorption property of pomelo peel to filter and adsorb the wastewater, and effectively removes dyes and oil substances in the printing and dyeing wastewater.

In order to achieve the above object, the technical scheme that the utility model takes is:

A printing and dyeing wastewater pretreatment device, including a cylindrical tank body, which is composed of a filter system, an adsorption system and a water collection system from top to bottom. These three systems divide the tank body from top to bottom into a filter box, an adsorption box and The water collection tank has three parts, a valve is set between the filtration system and the adsorption system, a valve is set between the adsorption system and the water collection system, the top of the tank is provided with a water inlet, and the bottom of the tank is diagonally arranged with the water inlet. The water outlet is provided with a rotating shaft along the axial direction in the tank, and the rotating shaft is driven by a motor installed on the top of the tank. The length of the rotating shaft includes two parts, one part is located in the filtration system, and the other part is located in the adsorption system, and the two parts can be simultaneously Rotate, or rotate separately;

The filter system includes a plurality of filter screens arranged radially in the tank body, the multiple filter screens are arranged at intervals along the axis of the tank body, each filter screen is provided with a brush, and the brush is rotatably connected to the rotating shaft; The filter brush cleans the filter screen 1 to avoid the clogging of the filter screen 1 and the pollution of the subsequent adsorption layer, which will affect the quality of the pretreated printing and dyeing wastewater.

The adsorption system includes a plurality of adsorption partitions arranged radially in the tank, and the plurality of adsorption partitions are arranged at intervals along the axis of the tank body, and a fan blade is arranged above each adsorption partition, and the fan blade is rotatably connected to the rotating shaft , the adsorption separator is coated with an adsorption layer made of pomelo peel;

The water collection system includes the filter screen 2 axially arranged in the water collection tank. One side of the filter screen 2 is a sedimentation tank. The sedimentation tank and the water inlet are located on the same side. There is a slag discharge port at the bottom of the sedimentation tank, and the printing and dyeing wastewater enters from the water inlet. In the tank, it enters the sedimentation tank of the water collection system through the filtration system and the adsorption system. After sedimentation and filtration by the second filter in the sedimentation tank, it enters the other side of the second filter from the outlet of the sedimentation tank, and then passes through the water outlet. out of the tank.

In a preferred embodiment, the first filter screen is 60-100 mesh, the second filter screen is 80-120 mesh, and the filter hole diameter of the second filter screen is smaller than that of the first filter screen.

Preferably, because the printing and dyeing wastewater is corrosive, the inner wall of the tank is coated with an anti-corrosion layer.

Preferably, a flow meter is provided at the water inlet, which can monitor the amount of wastewater pretreated each time.

The beneficial effects of the utility model are:

The utility model uses pomelo peel adsorbent as an adsorption layer in the pretreatment process of printing and dyeing wastewater. It has strong adsorption to dyes and oily substances, can effectively prevent oily substances from entering the printing and dyeing wastewater treatment system, and the adsorption layer can be replaced regularly. The used adsorption layer is degradable and environmentally friendly.

Description of drawings

Fig. 1 is the structural representation in the tank body of the utility model;

Fig. 2 is a structural schematic diagram of filter screen one.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described further.

As shown in Figure 1, a printing and dyeing wastewater pretreatment device includes a cylindrical tank body, and the tank body is composed of a filter system 21, an adsorption system 22 and a water collection system 23 from top to bottom. These three systems separate the tank body from top to bottom. And be divided into filter box 6, adsorption box 13 and water collection box 10 three parts below, be provided with valve 14 between filtration system 21 and adsorption system 22, be provided with valve 14 between adsorption system 22 and water collection system 23, the top of tank body A water inlet 2 is provided, and a water outlet 12 is arranged on the bottom of the tank body at a diagonal line with the water inlet 2, and a rotating shaft 5 is arranged in the axial direction in the tank body, and the rotating shaft 5 is driven to rotate by a motor 4 arranged on the top of the tank body, and the rotating shaft 5 The length direction includes two parts, one part is located in the filter system 21, and the other part is located in the adsorption system 22, and the two parts can rotate simultaneously or separately.

The rotating shaft described in this application is the prior art, and its structure and working principle will not be repeated here.

In this application, a flow meter can be set at the water inlet 2, so that the amount of wastewater pretreated each time can be monitored.

Filtration system 21 comprises a plurality of filter screens-15 radially arranged in the tank body, a plurality of filter screens-15 are arranged at intervals along the axis of the tank body, each filter screen-15 is provided with a brush 3, the brush 3 It is rotatably connected to the rotating shaft 5 .

The adsorption system 22 includes a plurality of adsorption partitions 7 radially arranged in the tank body, the plurality of adsorption partitions 7 are arranged at intervals along the axis of the tank body, and a fan blade 17 is arranged above each adsorption partition 7, and the fan blade 17 is rotatably connected to the rotating shaft 5, and the adsorption partition 7 is coated with an adsorption layer made of pomelo peel. The upper and lower surfaces of the adsorption partition are covered with an adsorption layer, and the adsorption layer can be easily replaced.

The water collection system 23 includes a filter screen 2 11 axially arranged in the water collection tank 10. One side of the filter screen 11 is a sedimentation tank 9, the sedimentation tank 9 and the water inlet 2 are located on the same side, and the bottom of the sedimentation tank 9 is provided with a slag discharge Mouth 8.

The working process of this device: printing and dyeing wastewater enters the tank body from the water inlet 2, enters the sedimentation tank 9 of the water collection system 23 through the filtration system 21 and the adsorption system 22, and is filtered in the sedimentation tank 9 by sedimentation and filter screen 2 11 After that, enter the other side of the filter screen two 11 from the sedimentation tank outlet 16, and then flow out of the tank body through the water outlet 12.

Specifically, close the valve 14, the printing and dyeing wastewater flows into the tank from the water inlet 2, and first reaches the filter box 6, and the motor 4 drives the rotating shaft 5 in the filter box 6 to drive the brush 3 to rotate at a speed of 10rps to wash the filter screen 15, Prevent filter screen one 15 from being clogged, waste water passes through filter screen one 15 to filter out large particle matter, after filtration is finished, open the valve 14 between filter system 21 and adsorption system 22, make the waste water after filtering enter in the adsorption box 13, and flow Through each adsorption partition 7, stop the water intake after the waste water is loaded to 9/10 of the capacity of the adsorption box 13, close the valve 14 between the filtration system 21 and the adsorption system 22, and the motor 4 drives the rotating shaft 5 in the adsorption box 13 at 50rps The rotation speed drives the fan blade 17 to rotate and stir the waste water, so that the grapefruit peel adsorption layer on the adsorption partition fully absorbs the dyes and oily substances in the waste water. The adsorption process lasts for 5 hours. After the adsorption is completed, turn off the motor, open the adsorption system 22 and collect water The valve 14 between the systems 23 allows the adsorbed waste water to flow into the sedimentation tank 9, where it settles by gravity to settle the remaining particulate matter, and the waste water flows into the filter screen 2 after filtering the residual suspended matter and impurities through the filter screen 2 11 In the water collection tank 10 on the other side, it flows out of the tank through the water outlet 12, and the sediment formed in the sedimentation tank is discharged out of the tank through the slag discharge port 8.

In this embodiment, the filter aperture of the second filter 11 is smaller than that of the first filter 15, the first filter is 60-100 mesh, and the second filter is 80-120 mesh.

Because the printing and dyeing wastewater is corrosive, an anti-corrosion layer is coated on the inner wall of the tank. The material of the anti-corrosion layer is a common corrosion-resistant material in the prior art, and will not be listed here.

The method of making the adsorption layer on the adsorption separator is as follows:

a. Remove the outer yellow skin of the pomelo peel to obtain the white flesh part of the pomelo peel, and cut it into pieces;

b. Soak the shredded particles in distilled water, wash away the pigment and soluble substances, and adjust the pH of the liquid to 8 with sodium hydroxide solution;

c. Dry the soaked granules in an oven at 80°C for 12 hours, crush and sieve to obtain 30-mesh granules, and obtain the pomelo peel adsorbent;

d. The pomelo peel adsorbent is packed in the filter bag, sewed up, and pressed into an adsorption layer with a thickness of 3mm;

The scope of protection of the utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the utility model all belong to the scope of protection of the utility model. Several improvements and modifications under the premise of the principle should be regarded as the protection scope of the present utility model.

Claims (4)

1. A printing and dyeing wastewater pretreatment device is characterized in that: it comprises a cylindrical tank body, and the tank body is followed by a filter system (21), an adsorption system (22) and a water collection system (23) from top to bottom, these three The system divides the tank body from top to bottom into three parts: filter box (6), adsorption box (13) and water collection box (10). A valve (14) is arranged between the filter system (21) and the adsorption system (22). A valve (14) is arranged between the system (22) and the water collection system (23), a water inlet (2) is arranged on the top of the tank body, and a water outlet is arranged at the bottom of the tank body diagonally to the water inlet (2) (12), the tank body is provided with a rotating shaft (5) along the axial direction, and the rotating shaft (5) is driven to rotate by a motor (4) arranged on the top of the tank body. The rotating shaft (5) includes two parts in the length direction, and a part is located in the filter system ( 21), the other part is located in the adsorption system (22), and the two parts can rotate simultaneously or separately; The filter system (21) comprises a plurality of filter screens one (15) radially arranged in the tank body, a plurality of filter screens one (15) are arranged at intervals along the axis of the tank body, each filter screen one (15) is provided with a hair brush (3), the hair brush (3) is rotatably connected to the rotating shaft (5); The adsorption system (22) includes a plurality of adsorption partitions (7) radially arranged in the tank body, and the plurality of adsorption partitions (7) are arranged at intervals along the axis of the tank body, and each adsorption partition (7) is arranged above There is a fan blade (17), and the fan blade (17) is rotatably connected to the rotating shaft (5), and the adsorption partition (7) is covered with an adsorption layer made of pomelo peel; The water collecting system (23) comprises the filter screen two (11) that is axially arranged in the water collecting tank (10), and one side of the filter screen two (11) is a sedimentation tank (9), and the sedimentation tank (9) and the water inlet ( 2) Located on the same side, the bottom of the sedimentation tank (9) is provided with a slag outlet (8), the printing and dyeing wastewater enters the tank from the water inlet (2), and enters the water collection system through the filtration system (21) and the adsorption system (22) In the settling tank (9) of (23), after settling and filtering of filter screen two (11) in settling tank (9), enter the other side of filter screen two (11) from settling tank outlet (16), Flow out of the tank body by water outlet (12) again. 2. The printing and dyeing wastewater pretreatment device according to claim 1, characterized in that: filter screen one (15) is 60-100 mesh, filter screen two (11) is 80-120 mesh, and filter screen two (11) The aperture of the filter hole is smaller than that of the filter screen one (15). 3. The printing and dyeing wastewater pretreatment device according to claim 1, characterized in that: the inner wall of the tank is coated with an anti-corrosion layer. 4. The printing and dyeing wastewater pretreatment device according to claim 1, characterized in that: the water inlet (2) is provided with a flow meter (1).