CN1721334A

CN1721334A - Furnace dust treatment method for sewage

Info

Publication number: CN1721334A
Application number: CN 200410071707
Authority: CN
Inventors: 杨忠英
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-16
Filing date: 2004-07-16
Publication date: 2006-01-18

Abstract

The present invention relates to environment protecting technology, and is especially sewage treating cinder process. Technologically, the present invention features that cinder as industrial waste is used in treating sewage through deodorizing, decolorizing, disinfection and adsorption. The basic technological process includes the first full contact of sewage with cinder to generate serial purifying reactions, including physical adsorption, filtering, deposition, chemical reaction, chemical adsorption and deposition; and the subsequent cinder-water separation through natural percolation and deposition in artificial filtering bed or large cinder field to obtain purified water. Compared with traditional biochemical process, the present invention has the advantages of low cost, different technological forms, wide material source and high treating effect.

Description

The furnace dust treatment method of sewage

The present invention is a kind of new method and the technology of field of environment protection about sewage disposal, the i.e. furnace dust treatment method of sewage.Its technical characterictic is pure in the raw material of the waste ashes in the plant produced as sewage disposal, because ashes have the effect (this is that I find after deliberation) of smelling, decolour, sterilizing and adsorbing that removes for sewage.Its basic technology is: at first allow sewage and ashes do to contact fully, make it finish a series of purification reaction, comprise physical adsorption, filtration, deposition, chemical reaction, chemisorption and sedimentary process, then by natural filtration or the settled Ash Water Separator process of cross flow in artificial filter bed or large-scale ash field, sewage is purified, and this method has less investment, working cost is low, process form is various, material source is extensive, treatment effect is good advantage than traditional biochemical treatment process.Be about a new road of sewage disposal in the field of environment protection.

Traditional secondary biochemical treatment, what generally adopt is activated sludge process, not more the selection.This method is not only invested greatly, and, the aeration tank oxygen supply electricity charge are also very expensive, the production area is shrouded by the gas of dirt, the function that also has it mainly is to handle city domestic sewage, for the extensive poisonous and hazardous trade effluent of being concentrated discharging by the industrial park, it is unable to do what one wishes but to seem, these are exactly the problem that the furnace dust treatment method of sewage of the present invention is devoted to solve.

Implement experimental example:

Make about one 20 liters filter vat (the bucket end makes sieve eye shape) and represent filter bed or large-scale diafiltration field in the actual motion; Cover at the bottom of with filter cloth bucket, get small particle size ashes in 15 kilograms, by little medium and small layering be loaded on the bucket in and with it on an empty receptacle, empty receptacle is represented the clear water recvery facility, get 15 kilograms in sewage again from the river, Bei'an, and progressively pour filter vat into and mix with ashes, make mortar, (river, Bei'an is to be positioned at of five kilometers places, Mudanjiang City by trade effluent, the mixed type sewage river that hospital's water and urban domestic wastewater are formed, river is lark, muddy and pungent smell arranged), this moment, a series of physical-chemical reactions and variation took place in sewage and ashes, and pollutants in sewage is adsorbed, and is retained among the hole of ashes, water purification slowly splashes within the container through natural filtration, approximately through one hour natural filtration, sewage purification finishes, and sees original muddiness again and the sewage of peculiar smell is arranged, through above-mentioned processing, the as clear as crystal free from extraneous odour of competing to become.The detected result that sewage after the processing is done through Mudanjiang Environmental Protection Agency is as follows:

Every mg/L that except that pH value, is in the table

Project	COD	BOD ₅	PH	NH ₃-N	SS	TP
Project	COD	BOD ₅	PH	NH ₃-N	SS	TP	Before the processing	467.5	132	6.38	18.97	1806	6.65
After the processing	42.5	19	7.23	1.223	133	2.20	Before the processing	467.5	132	6.38	18.97	1806	6.65

This shows that ashes have good cleaning action, further experiment for sewage, record ashes for the processing power of mixed type sewage be the ash amount 10-20 doubly, papermaking sewage is 20-30 times, and processing power is relevant with the pollution level of sewage, and processing efficiency is relevant with the size of ashes.The experiment of doing belongs to the Ash Water Separator of natural filtration completely, and grade sewage work that is suitable for founding the factory uses, and water outlet is effective, can reuse.

Ashes are the residuums behind the raw coal combustion, and reserves are very big in China, and utilization ratio is but very low, and the overwhelming majority is as waste and pile up like a mountain; Ashes are also the same with sewage, and all in output, the disposal in some city for ashes had become a difficult problem when every day was per, so, dispose of sewage with ashes, be utilization to ashes, also be purifying treatment to sewage, kill two birds with one stone.

Embodiment one:

Utilize the condition and the facility in fuel-burning power plant to dispose of sewage, this scheme is suitable for handling extensive poisonous and hazardous trade effluent and sanitary sewage.

Our national ashes output maximum be the fuel-burning power plant, the most concentrated place of ashes is the ash field in fuel-burning power plant, so-called ash field, generally be to build the place that is surrounded by hills, outskirts of a town in, by dam, backflow seepage well and water return pipeline are formed, area has several ten thousand square metres, hundreds of thousands of square metre according to the scale in power station, also have several square kilometres, mean depth also has 30 meters, Here it is ash.

The ashes that was produced from the power station, after slurrying, use the high-power high voltage slush pump, deliver to the ash field, through natural filtration and long apart from cross flow through transfer line, ashes slowly are deposited on the ash field, water in the mortar is clarification gradually in the cross flow process, flows to the backflow seepage well, and also some is to flow into the backflow seepage well through natural filtration, flow to water collecting basin through water return pipeline again, or reuse or discharging.

Last procedure of fuel-burning power plant production that Here it is, be whole process and the feature that ashes are disposed operation, and this feature meets the condition and the requirement of the furnace dust treatment method of sewage of the present invention fully, as long as is the finishing operation in the power station production slurrying link that ashes are disposed operation, changes sewage slurrying into by former clear water slurrying and get final product.

So only need sewage is done one-level pre-treatment (barrier, precipitation, in close), by the road sewage is delivered to the power station by pumping plant and done the slurrying use, sewage is in pulping process, substantially, its a series of purification reactions have been finished, especially in this course, because sewage can make most germs, virus and microorganism in the sewage be killed with contacting of high temperature ashes.Deliver to the ash field by the high-power high voltage slush pump through transfer line again and do natural filtration and long Ash Water Separator apart from cross flow, pollutants in sewage is by the adsorbed ash field that is deposited on of ashes, and some spontaneous evaporation of clear water, part natural filtration is to the backflow seepage well, major part is clarification gradually in growing apart from the cross flow process, flow into the backflow seepage well, flow into water collecting basin, this is the whole scavenging process of the present invention program's sewage.In fact, changing clear water slurrying is sewage slurrying, is to dispose operation to the ashes of power station production to have given new mission, makes the ashes in power station dispose operation when normally carrying out, and also makes sewage obtain purifying treatment.Allow sewage himself be purified in being used, allow the power station when normal power generation production is not subjected at all to influence, can become the sewage work of equal scale again, this is the present invention program's marrow and spirit.It also has three big advantages: 1, investment is few, and working cost is extremely low, be equal scale sewage work 10% less than.2, processing power is big, and treatment effect is good, can reach or be better than the emission standard of country.3, technology is simple, and management is simple, does not have the gas contamination of the dirt of biochemical treatment process, and can build up the automatic operating management system.

There are big or small fuel-burning power plant tens families in China, if can make full use of, the wastewater treatment rate of our country is improved largely, and can save investment for country, can create good economic benefits, environmental benefit and social benefit.Attached feasibility analysis report is a.

Embodiment two:

Can not be up to standard for some dischargings, and draining has the factory of reuse requirement, can build " substituting the ashes diafiltration continuously " sewage work; its main body structures are made up of several (should be even number) diafiltration beds and a water collecting basin, make with concrete; but shape rectangle; inclined-plane bucket framework is established in the bottom, shop plastic filter plate, filter plate upper berth filter cloth; add a cover isolated protective layer above the filter cloth; distribution device is established on bed body top, and discharge device is established in the bottom, and the materials device of arranging can be with spiral.Make with impregnating material, bottommost is established drainage tray to water collecting basin, the water collecting basin shape is not limit, level attitude should be lower than filter bed, filtrate (ashes) shop cloth can 1 meter dark about, its scale can be according to the water displacement of our factory, produce the ash amount and the our factory can design for the area that building is used, the filter bed total area is 2 times of the required area of the day amount of disposing of sewage, single bed surface is long-pending is determined that by the total area and single number it is 4.0T/m that the processing efficiency of filter bed is surveyed star according to experiment ².d.The filter rate is relevant with the size as the ashes of filter materials, tests by little medium and small place Min layers cloth effect better factually, and ashes can descend gradually through using its performance, more renew ash this moment.

Sewage enters each filter bed respectively by hydraulic pipe-line, through natural filtration, water outlet comes together in water collecting basin and is equipped with reuse, its advantage is that technology is simple, sewage need not the pre-treatment direct filtration, and water outlet is effective, and is as clear as crystal, shortcoming is that the workload of ashes replacement is big, and the replacement amount is relevant with the pollution level of processing sewage.The replacement amount of testing comprehensive sewage factually is 50kg/T.Papermaking sewage is 40kg/T, and used ashes can be self-produced or be collected, and working cost mainly is the replacement institute generation expense to ashes.

Other scheme:

1, can be according to grey the form and the scale in power station, use is united with the power station then in newly-built diafiltration field, mainly is the ashes slurrying that utilizes the power station to produce, and is transported to the diafiltration field.

2, can utilize outmoded ash field, power station merely, hydraulic pipe-line is built in the ash field of perhaps using, and sewage is directly sent into grey, allows mixing contact, diafiltration cross flow, the Ash Water Separator of sewage once finish at grey.

Claims

One, the present invention is a field of environment protection; a kind of new method and technology about sewage disposal; it is the furnace dust treatment method of sewage; its technical characterictic is pure in the waste ashes in the plant produced; as the raw material of disposing of sewage, because ashes have the effect of deodorizing, decolouring, sterilization and absorption for sewage.Its basic technology is at first to allow sewage and ashes do sufficient the contact, make it finish a series of purification reaction, comprise physical adsorption, filtration, deposition, chemical reaction, chemisorption and sedimentary process, then, natural filtration or the settled Ash Water Separator process of cross flow by in artificial filter bed or large-scale ash field are purified sewage.
Two, according to the basic technology of the furnace dust treatment method of claim one described sewage, and the embodiment one of design, utilize the condition and the facility in fuel-burning power plant, the former clear water slurrying of sending elsewhere in power plant's production finishing operation is sewage slurrying, disposes operation to the ashes of power station production and gives new mission.The ashes in power station are disposed when normally carrying out, also made sewage obtain purifying treatment.Allow sewage in being used, himself be purified, allow the power station when normal power generation production is not subjected at all to influence, can become the sewage work of equal scale again.
Three, the embodiment two that designs according to the basic technology of the furnace dust treatment method of claim one described sewage is built continuous replacement ashes diafiltration sewage work, allows sewage do the Ash Water Separator of natural filtration completely, makes water outlet reach the reuse requirement.
Four, other embodiment that designs according to the basic technology of the furnace dust treatment method of claim one described sewage.