CN-224199246-U - Nickel-containing wastewater zero discharge system

CN224199246UCN 224199246 UCN224199246 UCN 224199246UCN-224199246-U

Abstract

The utility model relates to a nickel-containing wastewater zero-discharge system, wherein an outlet of a clean water tank is connected with an immersed ultrafiltration tank, an ultrafiltration component is arranged at the bottom of the immersed ultrafiltration tank, a water producing end of the ultrafiltration component is connected with an inlet of an ultrafiltration water producing tank, an outlet of the ultrafiltration water producing tank is connected with an inlet of a security filter, an outlet of the security filter is connected with an inlet of a first-stage reverse osmosis membrane, a water producing end of the first-stage reverse osmosis membrane is connected with an inlet of a first-stage reverse osmosis fresh water tank, a concentrated solution end of the first-stage reverse osmosis membrane is connected with an inlet of a second-stage reverse osmosis membrane, a water producing end of the second-stage reverse osmosis membrane is connected with an inlet of the first-stage reverse osmosis fresh water tank, and an outlet of the second-stage reverse osmosis membrane is connected with an evaporator. The nickel-containing wastewater is separated by the membrane, so that the occupied area can be reduced while zero emission is realized, the treatment cost is saved, and the method has industrial application prospect.

Inventors

HUANG SHITA
ZHENG XUAN
HUANG LIQING

Assignees

福建安泰新能源科技有限公司

Dates

Publication Date: 20260505
Application Date: 20250424

Claims (8)

1. The zero discharge system of the nickel-containing wastewater is characterized by comprising a clean water tank, an immersed ultrafiltration tank, a coagulant medicine tank, an ultrafiltration water production tank, a security filter, a first reverse osmosis membrane, a first reverse osmosis fresh water tank, a first reverse osmosis concentrated water tank, a second reverse osmosis membrane, a second reverse osmosis concentrated water tank and an evaporator, wherein an outlet of the clean water tank is connected with the immersed ultrafiltration tank, an ultrafiltration component is arranged at the bottom of the immersed ultrafiltration tank, the immersed ultrafiltration tank is connected with the coagulant medicine tank, a water production end of the ultrafiltration component is connected with an inlet of the ultrafiltration water production tank, an outlet of the ultrafiltration water production tank is connected with an inlet of the security filter, an outlet of the security filter is connected with an inlet of the first reverse osmosis membrane, a concentrate end of the first reverse osmosis membrane is connected with an inlet of the first reverse osmosis concentrated water tank, an outlet of the first reverse osmosis water tank is connected with an inlet of the second reverse osmosis membrane, a water production end of the second reverse osmosis membrane is connected with an inlet of the second reverse osmosis membrane, and a concentrate end of the second reverse osmosis membrane is connected with an outlet of the second reverse osmosis concentrated water tank.
2. The nickel-containing wastewater zero-emission system of claim 1, wherein the bottom of the clean water tank is filled with a quartz sand filter layer, and an outlet of the clean water tank is arranged below the quartz sand filter layer.
3. The nickel-containing wastewater zero release system according to claim 1, wherein the ultrafiltration component comprises a hollow fiber membrane, wherein the hollow fiber membrane has an inner diameter of 0.5-1.0 mm and an outer diameter of 1.5-2.0 mm.
4. The nickel-containing wastewater zero-emission system of claim 3, wherein the hollow fiber membrane is a PVDF hollow fiber membrane with a pore diameter of 0.01-0.03 microns.
5. The nickel-containing wastewater zero discharge system of claim 1, wherein the cartridge filter is filled with a filter element with a precision of 2-6 microns.
6. The nickel-containing wastewater zero release system according to claim 5, wherein the first-stage reverse osmosis membrane is a polyamide reverse osmosis membrane, the polyamide reverse osmosis membrane is arranged according to a ratio of 2:1, and the first-stage reverse osmosis membrane is two-stage.
7. The nickel-containing wastewater zero release system of claim 5, wherein the secondary reverse osmosis membrane is an STRO membrane, and the STRO membrane is connected with a booster pump.
8. The nickel-containing wastewater zero release system according to any one of claims 1-7, wherein the evaporator is a low temperature vacuum evaporator.

Description

Nickel-containing wastewater zero discharge system Technical Field The utility model relates to the technical field of sewage treatment, in particular to a nickel-containing wastewater zero discharge system. Background The waste water generated in the aluminum profile anodic oxidation working section contains nickel and tin, and for enterprises, the nickel and the tin are objects to be treated in the waste water and are valuable heavy metals and noble metals. In order to meet the sewage discharge requirements of enterprises, the total nickel content in the wastewater cannot exceed 0.5mg/L, and the total tin content cannot exceed 0.5mg/L. Ideally, the treatment system can achieve zero emission, and the treated liquid is recycled to the anodic oxidation process or other working sections. As reuse water, the requirement on water quality generally comprises pH of 6.5-8.5, DTS content of less than 300mg/L and COD content of less than 100mg/L. The Chinese patent No. 111499082A discloses an industrial wastewater treatment process based on electrolysis and membrane filtration, which comprises the following steps of S1, S2, carrying out electrolytic oxidation on industrial wastewater, filtering sludge through electric flocculation, S3, placing the filtered sludge in a sludge box, then dehydrating the sludge to obtain the sludge, S4, filtering the industrial wastewater with an ultrafiltration membrane to obtain produced water and concentrated solution, wherein the concentrated solution enters the sludge box to carry out the subsequent dehydration process, S5, carrying out reverse osmosis treatment on the filtered produced water to obtain concentrated solution, and S6, recycling or discharging residual produced water. The method adopts an electrolytic oxidation method, has higher treatment cost and large equipment occupation area, and is not applicable to enterprises with limited treatment sites. Disclosure of utility model Aiming at the problems, the utility model provides a nickel-containing wastewater zero-emission system which has the characteristics of small occupied area and low treatment cost. The system separates nickel salt by means of an immersed ultrafiltration tank and two-stage reverse osmosis, and the obtained dialysate can be recycled to an anodic oxidation working section. The specific scheme is as follows: The utility model provides a nickel-containing waste water zero release system, includes clean water basin, submergence formula ultrafiltration pond, coagulant medical kit, ultrafiltration water tank, cartridge filter, one-level reverse osmosis membrane, one-level reverse osmosis fresh water tank, one-level reverse osmosis concentrate tank, second grade reverse osmosis membrane, second grade reverse osmosis concentrate tank and evaporimeter, wherein, the export of clean water basin with submergence formula ultrafiltration pond links to each other, the bottom of submergence formula ultrafiltration pond is equipped with ultrafiltration subassembly, submergence formula ultrafiltration pond is connected the coagulant medical kit, the water production end of ultrafiltration subassembly is connected the entry of ultrafiltration water tank, the exit linkage of ultrafiltration water tank the entry of cartridge filter, the exit linkage of cartridge filter one-level reverse osmosis membrane's water production end is connected the entry of one-level reverse osmosis fresh water tank, the concentrate end of one-level reverse osmosis membrane is connected the entry of one-level reverse osmosis concentrate tank, the exit linkage of one-level reverse osmosis concentrate tank second grade reverse osmosis membrane's entry, second grade reverse osmosis membrane's water tank's water production end is connected the entry of one-level reverse osmosis concentrate tank, the reverse osmosis concentrate end is connected the entry of two reverse osmosis concentrate tank. Furthermore, the bottom of the clean water tank is filled with a quartz sand filter layer, and an outlet of the clean water tank is arranged below the quartz sand filter layer. Further, the ultrafiltration module comprises a hollow fiber membrane, wherein the inner diameter of the hollow fiber in the hollow fiber membrane is 0.5-1.0 mm, and the outer diameter of the hollow fiber membrane is 1.5-2.0 mm. Further, the hollow fiber membrane is a PVDF hollow fiber membrane, and the aperture is 0.01-0.03 microns. Further, the cartridge filter is filled with a filter element with the precision of 2-6 microns. Further, the first-stage reverse osmosis membrane is a polyamide reverse osmosis membrane, the polyamide reverse osmosis membranes are arranged according to a ratio of 2:1, and the first-stage reverse osmosis membrane is two-stage. Further, the second-stage reverse osmosis membrane is an STRO membrane, and the STRO membrane is connected with a booster pump. Further, the evaporator is a low-temperature vacuum evaporator. By adopting the technical scheme, compare