CN202849189U

CN202849189U - Device for removing lead in industrial waste water by utilizing tea leaves

Info

Publication number: CN202849189U
Application number: CN 201220202026
Authority: CN
Inventors: 张玲; 朱颖; 左丹; 吴彪; 裴君辉; 冯雪; 李文杞
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2013-04-03
Anticipated expiration: 2022-05-08

Abstract

The utility model provides a device for removing lead in industrial waste water by utilizing tea leaves. A rotating filtration fine screen device provided with the tea leaves is added after waste water flows through coarse and fine fences and grids in a first step of a waste water treatment process, the rotating filtration fine screen device is composed of a circular frame and a rotating device, diameter of a screened port is 0.2-0.5mm, and a screen is a sealing device and is provided with an opening which can be opened and is used for replacing and washing the tea leaves inside. The device provided by the utility model effectively utilizes low-cost organisms to adsorb heavy metal in acidic industrial waste water, structure is simple, and the tea leaves are environment-friendly and easy to recycle.

Description

A kind of trade effluent utilizes the device of tea grounds deleading

Technical field

To in the acidic industrial effluent the lead ion heavy metal good adsorption effect is arranged, be applicable to contain a large amount of lead ions, and be acid trade effluent and absorb.

Technical background

Electroplate, metal processing, preparation of ore, battery manufacture, the industries such as petroleum refining all need to use metallic lead, plumbous in widespread use also different Cheng Du environment has been caused pollution.Lead and compound thereof enter human body and can accumulating in liver and kidney, and cause the oxyphorase biosynthesis block and anaemia occurs, thereby to people's healthy generation detrimentally affect.Traditional lead waste water treatment technology has, chemical precipitation method, electrolytic process, absorption method, ion exchange method etc.The consumption that chemical precipitation method is good to chemical reagent is larger, and has the possibility of secondary pollution; The electrolytic process consumes power is large, the processing wastewater flow rate is little, if biological adsorption is used for early stage of wastewater treatment, can reduce greatly the metal lead amount, in the chemical precipitation of back or electrolytic process, can reduce the congenial amount of chemical agent, also can consume a large amount of electric energy.

Contained carboxyl in the biological adsorption material chemical structure, amino can become the adsorption potential of heavy metal.Utilize the tea grounds adsorpting lead ion to be because tea grounds to lead ion except the chemisorption that ion-exchange is arranged, also because tealeaves has mesh structural porous structure, physisorption has occured in the cell walls on lead ion and tealeaves surface.But the dosage of tea grounds, the pH value, temperature all can affect tea grounds to the adsorption effect of lead ion in the water, and the tea-polyphenol in the tea also can add in the back flocculation agent PAC and go out, but tea-polyphenol and metal ion reaction have reversibility, and the throw out that pre-treatment produces can make tea-polyphenol free out by adding acid treatment, and the economic worth of tea-polyphenol is very high again, so the recycling to tea-polyphenol is considered in suggestion in Practical Project, can reduce like this expense of sewage disposal.

The utility model content

The utility model is the device that trade effluent utilizes the tea grounds deleading, be exactly after the first step of wastewater treatment program is passed through thickness barrier lattice, add the rotation fine screen mesh filtration unit that tea grounds is housed thereafter, rotation fine screen mesh circular frame and wheelwork form, the screened port diameter is 0.2 ~ 0.5mm, screen cloth is a tightness system, and the mouth that can open is arranged, and is used for changing clothes the tea grounds of the inside.

The rotary screen that originally has is transformed, can become tea grounds can being placed on wherein of sealing through improving in the ghost originally, working as like this current slowly flows in the turning barrel through entrance, most of plumbous can absorption by tea grounds in the trade effluent, water after the filtration can be got rid of by the rotating cylinder lower screen, enters next program.Fiber in the water, the fine suspension such as paper pulp can be blocked, and the heavy metal lead in the water also can be absorbed by tea grounds, changes tea grounds behind certain hour, and used tea grounds can be through cleaning, and dry the grade continues to reuse.If biological adsorption is used for early stage of wastewater treatment, can reduce greatly the metal lead amount, in the chemical precipitation of back or electrolytic process, can reduce the congenial amount of chemical agent, also can consume a large amount of electric energy.

Description of drawings

Fig. 1 is the schema of Industrial Wastewater Treatment;

Among the figure: the 1-raw wastewater; 2-thickness grid; 3-tea grounds mesh gauze filter; The 4-settling pit; The 5-preliminary sedimentation tank; The 6-aeration tank; The 7-air; The 8-second pond; 9-Cl ₂Or other sterilizing agent; The 10-contact tank; The 11-water outlet; The 12-sludge reflux; 13-sludge reflux pump house; The 14-mud-collecting well; The 15-flocculation agent; The 16-sludge thickener; 17-one-level digester; 18-secondary digester; 19-sludge dewatering machine room; The outward transport of 20-mud cake; The 21-supernatant liquor refluxes

Fig. 2 centrifugal screen integral filtering system structural representation

Among the figure: the 22-support; The 23-flush valve; 24-centrifugal filter tank body; The 25-water-in; The 26-top cover; The 27-vent valve; The 28-eddy flow accelerates isolating cylinder; The 29-mesh gauze filter; 30-blowdown chamber; The 31-sewage draining exit

Embodiment

At first to reclaim tea grounds, tea grounds is carried out pre-treatment;

Then to determine according to the lead content in the waste water dosage of tea grounds;

Want suitable adjusting wastewater temperature, pH makes tea grounds reach maximum value to the absorption of lead;

The water behind the waste water filtering can be got rid of by the rotating cylinder lower screen for a certain amount of tea grounds of packing into, enter next program.Fiber in the water, the fine suspension such as paper pulp can be blocked, and the heavy metal lead in the water also can be absorbed by tea grounds.

Want the regular useless tea grounds of replacing, wherein heavy metal and tea-polyphenol reclaimed, tea grounds can use by secondary after cleaning is dried.

This device can only be gone out the lead ion of a part, but has reduced the workload that operates later, and tea grounds is nontoxic, and environmental protection is easy to get.

Claims

1. a trade effluent utilizes the device of tea grounds deleading, be exactly after the first step of wastewater treatment program is passed through thickness barrier lattice, add the rotating filter fine screen mesh device that tea grounds is housed thereafter, the rotating filter fine screen mesh is that circular frame and wheelwork form, the screened port diameter is 0.2 ~ 0.5mm, screen cloth is a tightness system, and the mouth that can open is arranged, and is used for changing clothes the tea grounds of the inside.