CN211004968U

CN211004968U - Electroplating wastewater zero discharge device

Info

Publication number: CN211004968U
Application number: CN201920747874.1U
Authority: CN
Inventors: 曾健康; 朱跃军; 陈世杰
Original assignee: Wuhan Jiangyang Environmental Technology Stock Co ltd
Current assignee: Wuhan Jiangyang Environmental Technology Stock Co ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-07-14
Anticipated expiration: 2029-05-21

Abstract

The utility model relates to an electroplating effluent zero discharge apparatus. It is formed by oil interceptor (1), equalizing basin (2), air supporting pond (3), pH callback pond (4), MBR membrane cisterna (5), reverse osmosis unit (6) combination in proper order, its characterized in that: adjusting tank (2) in be equipped with first overflow plate (7), air supporting pond (3) separate into air supporting contact chamber (10), separation chamber (11) and clear water room (12) through last overflow plate (8) and underflow plate (9) down, the bottom of air supporting contact chamber (10) is equipped with gas release head (13), upper portion is equipped with scrapes sediment machine (14) in the middle of separation chamber (11), separation chamber (11) right side upper portion is equipped with slag discharging groove (15), clear water room (12) upper portion is through pipeline and pH back regulation pond (4) access connection. The utility model improves the water quality of the discharged water, increases the reuse rate of the electroplating wastewater and reduces the water discharge.

Description

Electroplating wastewater zero discharge device

Technical Field

The utility model relates to a wastewater treatment method, in particular to an electroplating wastewater zero discharge device. The device utilizes physical air supporting to get rid of most metallic ions in aqueous, and through MBR (biofilm reactor), the organic matter of further getting rid of aquatic, the play water gets into reverse osmosis unit, gets rid of the water soluble salt, makes the product water reach reuse water standard, supplies the factory production cycle to use.

Background

The electroplating industry is an important industry of industrial production in China. But the electroplating industry is also one of the main sources of sewage discharge. Therefore, the waste water of the electroplating industry must be thoroughly treated in order to protect the environment. The method for treating the waste water in the electroplating industry in China mainly comprises the steps of recovering heavy metals by an ion exchange method, treating mixed waste water by a chemical method, a ferrite method, a biological method and the like, wherein the chemical method is a main treatment technology. However, the conventional electroplating wastewater treatment device is not only too high in cost, but also easily causes harm to organisms and damages to the environment because heavy metals are discharged into a water body without being recovered. Therefore, the invention is very beneficial to inventing the electroplating wastewater zero discharge device.

Disclosure of Invention

The utility model discloses an content purpose is exactly to prior art's defect, provides an electroplating effluent zero discharge apparatus, and it increases MBR (biofilm reactor) + reverse osmosis unit behind the air supporting pond, has improved out water quality of water, has increased electroplating effluent rate of recovery, has reduced the displacement.

The technical scheme of the utility model is realized like this: the utility model provides an electroplating effluent zero release unit, it forms its characterized in that by oil interceptor (1), equalizing basin (2), air supporting pond (3), pH callback pond (4), MBR membrane cisterna (5), reverse osmosis unit (6) combination in proper order: adjusting tank (2) in be equipped with first overflow plate (7), air supporting pond (3) separate into air supporting contact chamber (10), separating chamber (11) and clear water room (12) through last overflow plate (8) and underflow plate (9) down, the bottom of air supporting contact chamber (10) is equipped with gas release head (13), upper portion is equipped with scrapes sediment machine (14) in the middle of separating chamber (11), separating chamber (11) right side upper portion is equipped with slag discharge groove (15), clear water room (12) upper portion is through pipeline and pH back-off pond (4) access connection, pH back-off pond (4) lower part pass through overflow hole (16) and MBR membrane cisterna (5) intercommunication, the export of MBR membrane cisterna (5) is through water pump (18) and pipeline and safety filter (17) access connection, the export and the reverse osmosis unit (6) access connection of safety filter (17).

A bottom water outlet (19) of the clean water chamber (12) is connected with a dissolved air water pump (20) through a pipeline, an outlet of the dissolved air water pump (20) is connected with an inlet of a pressure dissolved air tank (21), an air compressor (22) is connected with an inlet of the pressure dissolved air tank (21), and an outlet of the pressure dissolved air tank (21) is connected with an air release head (13) in the air flotation contact chamber (10) through a pipeline.

The working principle of zero discharge of electroplating wastewater is as follows:

1. oil separation tank

Raw water flows in from the head end of the oil separation tank through the oil separation tank, flows out from the tail end of the oil separation tank, and oil droplets float to the water surface under the action of buoyancy and are collected in the oil collection pipe.

2. Adjusting tank

The water after oil separation in the oil separation tank automatically flows into an adjusting tank, is added with alkali to adjust the pH value to be neutral, and is lifted to an air floatation tank by a pump.

3. Air floatation tank

After PAC and PAM are added into the reaction tank, the wastewater automatically flows into the air floatation tank, bubbles are taken as carriers, so that flocculating constituents are adhered to the carrier bubbles and float to the water surface along with the carrier bubbles to form foam scum, and the foam scum is separated from the water.

4. MBR membrane tank

The effluent of the air floatation tank is adjusted to be neutral in pH value by a pH adjusting tank and then flows into an MBR membrane tank. In the MBR, organic matters in the wastewater are further degraded under the action of activated sludge, and the effluent quality is optimized.

5. Reverse osmosis safety filter

The main purpose of the 5 im cartridge filter was to trap large particulates, colloids, and suspensions that could not be removed by a mechanical filter. So as to prevent large particles from entering the high-pressure pump and the reverse osmosis membrane. The shell of the security filter is made of engineering plastics, and the filter element is used for pulling the rod with the precision of 5 mu m. Under normal working conditions, the filter element can maintain the service life of about 1-2 months, and should be replaced when the pressure difference is larger than the set pressure difference (usually 0.07-0.1 MPa).

6. Reverse osmosis device

The reverse osmosis device consists of two stages of reverse osmosis. Reverse osmosis is a desalination technology which is most widely applied in the current water treatment system and has extremely high desalination capacity. Reverse osmosis devices use sufficient pressure to separate the solvent (typically water) from the solution through a reverse osmosis membrane (or semi-permeable membrane) because this process is opposite to natural osmosis and is therefore called reverse osmosis. After reverse osmosis treatment, most of ions in water are removed, and the desalination rate can reach more than 97%.

The utility model discloses an oil interceptor gets rid of the grease that the aquatic contains, then utilizes the air supporting technique to get rid of aquatic suspended substance and most metal ion, combines membrane technology to carry out advanced treatment to electroplating effluent again, has improved electroplating effluent's rate of recovery, reduces the emission of pollutant. The salt content in the wastewater is reduced by using an advanced membrane treatment technology, so that the effluent quality is greatly improved, and the requirement of reuse water quality is met.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the flotation tank of the present invention;

FIG. 3 is a schematic structural view of the MBR membrane tank of the present invention;

fig. 4 is a schematic structural view of the reverse osmosis membrane device of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in figure 1, as shown in figures 2 and 3, the device is formed by combining an oil separation tank (1), an adjusting tank (2), an air flotation tank (3), a pH adjusting back tank (4), an MBR membrane tank (5) and a reverse osmosis device (6) in sequence, wherein a first overflow plate (7) is arranged in the adjusting tank (2), the air flotation tank (3) is divided into an air flotation contact chamber (10), a separation chamber (11) and a clear water chamber (12) through an upper overflow plate (8) and a lower overflow plate (9), a gas release head (13) is arranged at the bottom of the air flotation contact chamber (10), a slag scraper (14) is arranged at the upper middle part of the separation chamber (11), a slag discharge groove (15) is arranged at the upper part of the right side of the separation chamber (11), the upper part of the clear water chamber (12) is connected with an inlet of the pH adjusting back tank (4) through a pipeline, the lower part of the pH adjusting back tank (4) is communicated with, the outlet of the MBR membrane pool (5) is connected with the inlet of a cartridge filter (17) through a water pump (18) and a pipeline, and the outlet of the cartridge filter (17) is connected with the inlet of a reverse osmosis device (6).

Claims

1. The utility model provides an electroplating effluent zero release unit, it forms its characterized in that by oil interceptor (1), equalizing basin (2), air supporting pond (3), pH callback pond (4), MBR membrane cisterna (5), reverse osmosis unit (6) combination in proper order: adjusting tank (2) in be equipped with first overflow plate (7), air supporting pond (3) separate into air supporting contact chamber (10), separating chamber (11) and clear water room (12) through last overflow plate (8) and underflow plate (9) down, the bottom of air supporting contact chamber (10) is equipped with gas release head (13), upper portion is equipped with scrapes sediment machine (14) in the middle of separating chamber (11), separating chamber (11) right side upper portion is equipped with slag discharge groove (15), clear water room (12) upper portion is through pipeline and pH back-off pond (4) access connection, pH back-off pond (4) lower part pass through overflow hole (16) and MBR membrane cisterna (5) intercommunication, the export of MBR membrane cisterna (5) is through water pump (18) and pipeline and safety filter (17) access connection, the export and the reverse osmosis unit (6) access connection of safety filter (17).

2. The zero discharge apparatus for wastewater from electroplating according to claim 1, wherein: a bottom water outlet (19) of the clean water chamber (12) is connected with a dissolved air water pump (20) through a pipeline, an outlet of the dissolved air water pump (20) is connected with an inlet of a pressure dissolved air tank (21), an air compressor (22) is connected with an inlet of the pressure dissolved air tank (21), and an outlet of the pressure dissolved air tank (21) is connected with an air release head (13) in the air flotation contact chamber (10) through a pipeline.