CN1693541A

CN1693541A - Continuous cyclone clarification treatment device for electroplating waste water

Info

Publication number: CN1693541A
Application number: CN 200510049436
Authority: CN
Inventors: 雷乐成; 周明华; 邵振华
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2005-03-23
Filing date: 2005-03-23
Publication date: 2005-11-09
Anticipated expiration: 2025-03-23
Also published as: CN100348781C

Abstract

A continuous spiral-flow apparatus for clarifying the sewage of electroplating is composed of casing, the concentrically arranged internal cylindrical pipe with upper horn-shaped segment and low reaction area, barrier ring and conic external pipe, a cylinder surrounding said reaction area, upper and lower ring plates, the oblique tubes and foam filtering layer between upper and lower ring plates, and overflow well for draining clean water.

Description

The continuous cyclone clarification treatment device of electroplating wastewater

Technical field

The present invention relates to is the continuous cyclone clarification treatment device of a kind of finishing apparatus of electroplating wastewater, especially electroplating wastewater.

Background technology

At present for the electroplating enterprise of middle and small scale, because its waste water water yield is little, water quantity and quality changes greatly, the material recovery value in the waste water is not high, its cost-effective treatment process remains chemical precipitation method.Traditional chemical method treatment process mainly comprises pre-treatment, aftertreatment, sludge dewatering three parts, wherein tube settling and sand filtration are mostly adopted in aftertreatment, though this technical process is simple, go up detective, settling tank, sand filter floor space are big, sand filter back flushing difficulty.And, often contain tensio-active agent in the electroplating wastewater and electroplate solvent, the chemical oxygen demand (COD) (COD in the waste water _Cr) be 180～260mg/L, traditional aftertreatment technology is owing to lack chemical oxygen demand (COD) (COD _Cr) effective technology of removing causes water outlet COD _CrOften do not reach integrated wastewater discharge standard.Therefore be not suitable for the wastewater treatment of middle and small scale electroplating enterprise.

Summary of the invention

The purpose of this invention is to provide and a kind ofly will precipitate, filter, clarify in the continuous cyclone clarification treatment device of the electroplating wastewater of one.

The continuous cyclone clarification treatment device of electroplating wastewater of the present invention, comprise housing, in housing from inside to outside successively coaxial line be equipped with inner core, ring washer and little down big conically shaped, the hypomere of inner core is a cylindrical tube, the epimere barrel dliameter is expanded gradually and is horn-like formation reaction chamber, lower end at inner core has return port, water inlet pipe stretches into housing and is communicated with the inner core lower end is tangent, space between inner core and the ring washer constitutes the mud circular chamber, the big end of conically shaped circumferentially links to each other with the inwall of housing, the small end of conically shaped circumferentially links to each other with the junction of ring washer and housing bottom, the cavity that conically shaped outer wall and housing form is a water purifying chamber, the inwall of conically shaped and the space between the ring washer constitute mud-collecting slot, water purifying chamber is provided with rising pipe and draws housing, mud-collecting slot is provided with shore pipe and draws housing, coaxial line is with tube outside the reaction chamber of inner core, be fixed with upper annular plate and lower annular plate and form the sludge settling chamber between the outer wall of tube and the inwall of housing, this exceeds the hydraucone and the upper annular plate of reaction chamber, on the lower annular plate around circumferentially porose be arranged in the sludge settling chamber in inclined tube communicate, above inclined tube, be provided with the foam bead filtering layer, water outlet is arranged on the upper annular plate, water outlet is provided with the filter cap, in the space that upper annular plate and drum outer wall and inner walls surround, around the inner walls device overflow groove is arranged, an end of the pure water pipe that communicates with overflow groove inserts in the water purifying chamber.

During apparatus of the present invention operation, add polyacrylamide (PAM) at electroplating wastewater, electroplating wastewater enters the inner core from tangential direction through water inlet pipe, electroplating wastewater is along mixing with PAM fast and equably in the inner core rotation process upwards, produce the whirlpool body, for tiny heavy metal hydroxide throw out provides good flocculating conditions, improved flocculating effect and shortened flocculation time.

After current quickened to arrive reaction chamber along the inner core rotation, because the diameter of reaction chamber enlarges gradually, flow velocity reduced, and flco is grown up gradually, and flow velocity slows down after water overflows the inner core hydraucone, and the residence time increases, and impels to form big flco rapid precipitation.

Because the residence time increases, the particle that portion size is bigger directly sinks to the mud circular chamber between inner core and the ring washer, and after current filter through the tube settling of sludge settling chamber and foam bead filtering layer again, mud sinks in the mud-collecting slot along inclined tube, excrete from shore pipe by hydrostaticpressure, clear water flows into the overflow groove after the filter cap comes out, and arrives in the water purifying chamber by pure water pipe, discharges from water outlet at last.

Owing to form cyclone reaction in inner core, the bottom negative pressuren zone can suck inner core from return port with the mud of mud circular chamber, circulates.Because mud has bigger specific surface, adopt clarification process that it is circulated, utilize its adsorption surface can remove COD in the waste water effectively _Cr

The present invention is integrated in eddy flow mixing, clarification, precipitation, filtration, organic the combining together of mud circulation of electroplating wastewater aftertreatment in the device and finishes.This device has little, the COD of floor space _CrAdvantage such as clearance height, effluent quality be good, can dynamically handle continuously, test shows: for total chromium, total copper, total cyanide concentration be respectively 6.72,18.40, the electroplating wastewater of 22.10mg/L after this device is handled, total chromium of water outlet, always copper, total cyanide clearance reach 93.3%, 97.4%, 99.9% respectively.Waste water COD _CrFrom about initial 240mg/L, reduce to about 60mg/L through behind the cyclone clarification.This device is adapted at applying in the micromidi electric plating corporation.

Description of drawings

Fig. 1 is the structural representation of the continuous cyclone clarification treatment device of electroplating wastewater;

Fig. 2 is the vertical view of Fig. 1.

Embodiment

With reference to Fig. 1, Fig. 2, the continuous cyclone clarification treatment device of electroplating wastewater comprises housing 20, in housing 20 from inside to outside successively coaxial line be equipped with inner core 4, ring washer 21 and little down big conically shaped 7, the hypomere of inner core 4 is a cylindrical tube, the epimere barrel dliameter is expanded gradually and is horn-like formation reaction chamber 13, have return port 17 in the lower end of inner core, water inlet pipe 1 stretches into housing 20 and is communicated with the inner core lower end is tangent, space between inner core 4 and the ring washer 21 constitutes mud circular chamber 16, the big end of conically shaped 7 circumferentially links to each other with the inwall of housing 20, the small end of conically shaped 7 circumferentially links to each other with the junction of ring washer 21 with housing 20 bottoms, the cavity that conically shaped 7 outer walls and housing 20 form is a water purifying chamber 18, space between the inwall of conically shaped 7 and the ring washer 21 constitutes mud-collecting slot 3, ring washer 21 highly be about inner core 4 cylindrical tube section height 1/2nd, water purifying chamber 18 is provided with rising pipe 19 and draws housing, mud-collecting slot 3 is provided with shore pipe 2 and draws housing, coaxial line is with tube 11 outside the reaction chamber 13 of inner core 4, be fixed with upper annular plate 9 and lower annular plate 5 and form sludge settling chamber 6 between the outer wall of tube 11 and the inwall of housing 20, tube 11 exceeds the hydraucone and the upper annular plate 9 of reaction chamber 13, on the lower annular plate 5 around circumferentially porose be arranged in sludge settling chamber 6 in inclined tube 14 communicate, above inclined tube 14, be provided with foam bead filtering layer 8.In order to reach good sludge settling effect, make inclined tube 14 and horizontal direction be 60 degree angles usually.On the upper annular plate 9 water outlet is arranged, water outlet is provided with filter cap 12, in the space that upper annular plate 9 and tube 11 outer walls and housing 20 inwalls surround, inner wall device around housing 20 has annular overflow trough 10, pure water pipe 15 is housed in the overflow groove 10, and an end of the pure water pipe 15 that communicates with overflow groove 10 passes through the wall of upper and lower

annular plate

9,5 and conically shaped 7 and inserts in the water purifying chamber 18.

Claims

1. the continuous cyclone clarification treatment device of electroplating wastewater, it is characterized in that comprising housing (20), in housing (20) from inside to outside successively coaxial line be equipped with inner core (4), ring washer (21) and little down big conically shaped (7), the hypomere of inner core (4) is a cylindrical tube, the epimere barrel dliameter is expanded gradually and is horn-like formation reaction chamber (13), have return port (17) in the lower end of inner core, water inlet pipe (1) stretches into housing (20) and is communicated with the inner core lower end is tangent, space between inner core (4) and the ring washer (21) constitutes mud circular chamber (16), the big end of conically shaped (7) circumferentially links to each other with the inwall of housing (20), the small end of conically shaped (7) circumferentially links to each other with the junction of ring washer (21) with housing (20) bottom, the cavity that conically shaped (7) outer wall and housing (20) form is water purifying chamber (18), space between the inwall of conically shaped (7) and the ring washer (21) constitutes mud-collecting slot (3), water purifying chamber (18) is provided with rising pipe (19) and draws housing, mud-collecting slot (3) is provided with shore pipe (2) and draws housing, coaxial line is with tube (11) outside the reaction chamber (13) of inner core (4), be fixed with upper annular plate (9) and lower annular plate (5) and form sludge settling chamber (6) between the outer wall of tube (11) and the inwall of housing (20), tube (11) exceeds the hydraucone and the upper annular plate (9) of reaction chamber (13), lower annular plate (5) go up around circumferentially porose be arranged in sludge settling chamber (6) in inclined tube (14) communicate, be provided with foam bead filtering layer (8) in the top of inclined tube (14), upper annular plate has water outlet on (9), water outlet is provided with filter cap (12), in the space that upper annular plate (9) and tube (11) outer wall and housing (20) inwall surround, around housing (20) inner wall device overflow groove (10) is arranged, an end of the pure water pipe (15) that communicates with overflow groove (10) inserts in the water purifying chamber (18).

2. the continuous cyclone clarification treatment device of electroplating wastewater according to claim 1 is characterized in that inclined tube (14) and horizontal direction are 60 degree angles.