CN201144181Y

CN201144181Y - Waste water preprocess device for molasses alcohol

Info

Publication number: CN201144181Y
Application number: CNU2007201831205U
Authority: CN
Inventors: 张巨煌; 何建生; 何阿莉; 袁建新; 苏克·巴特尔; 尚华
Original assignee: 张巨煌
Current assignee: Xinjiang Risingsun Environmental Protection Co., Ltd.
Priority date: 2007-11-02
Filing date: 2007-11-02
Publication date: 2008-11-05
Anticipated expiration: 2017-11-02

Abstract

A pre-processing device for the waste water of molasses alcohol belongs to the field of water processing; the device is provided with a pre-depositing pool, an electrolytic pool, a neutral coagulating pool and a depositing pool that are communicated in turn; the electrolytic pool is divided into two chambers, each of which is provided with a set of device for catalyzing an iron-carbon reaction; the chambers are structured in that: the bottoms of the chambers are respectively provided with an aerated conduit and are all communicated with a blower outside the pool; the walls of the aerated conduits are provided with holes; an antisepsis steel framework is arranged above the aerated conduit and an opened PE plate is paved on the aerated conduit; a padding layer is piled on the plate and the padding layer consists of a cobble layer at the lower part as well as a coke-sponge iron staggered layer at the upper part; the bottoms of the two chambers are communicated; the lower parts of the pre-depositing pool and the depositing pool are all provided with mud suction tubes and are respectively communicated with the bolt pumps outside the pools; the neutral coagulating pool is divided into two chambers; the upper parts are all provided with a drug-adding tube and both the two chambers are communicated with a drug-adding device outside the pool; the bottoms of the two chambers are communicated, respectively provided with an aerated conduit and all communicated with a blower outside the pool; the walls of the aerated conduits are opened; the utility model can reduce the organic matter pollution concentration of waste water, remove the harmful and toxic matters to microorganisms, improve the subsequent biological treatment load, reduce the operation cost and engineering investment as well as simplify the operations.

Description

Molasses alcohol sewage pre-treater

1, technical field:

Molasses alcohol sewage pre-treater of the present invention belongs to water treatment field.

2, background technology:

Molasses alcohol waste water is the remaining residual syrup of beet sugar manufacture process, generate alcohol through acidifying fermentation, again with the raffinate of discharging after the alcohol distillation, this waste water is rich in organism, it is many to belong to suspended substance, the inorganic salt content height, the colourity height, the high-enriched organics pollutant effluents that pH value is low, can not directly adopt general biochemistry, physicochemical techniques is handled, must adopt pretreatment technology, earlier its pH value is increased to 6.5-7.5, reduces the organic contamination substrate concentration, reduce suspended substance, reduce colourity, wait to reach biochemical, after the materialization treatment condition, can mix with other lower concentration sugaring comprehensive wastewaters and carry out biochemistry, materialization is handled, and realizes qualified discharge.The pretreatment technology of in the past taking have direct dilution method, in and dilution method etc. after the dilution method, chemical coagulation, there is the higher and operation complex management of processing cost in these processing methodes, problems such as labour intensity is big, pretreating effect is not very good yet simultaneously, does not obviously improve alleviating subsequent treatment process load, reduction construction investment and running cost.

3, summary of the invention:

The object of the present invention is to provide a kind of pretreating effect ideal, cost is low, simple and convenient, Molasses alcohol sewage pre-treater easy to implement.

Catalysis iron charcoal reaction process is based on the Corrosion of Metallic Materials electrochemical principle, two kinds of metal or metals with different electropotentials are in direct contact with nonmetal, be immersed in the conductive electrolyte solution, battery effect takes place and form countless small corrosion galvanic cells.This galvanic cell comprises " microcosmic battery " and " macroscopical battery ", " microcosmic battery " is that the chemical potential with the iron carbide of nano sized particles distributions and some impurity owing to iron filings itself is higher than pure iron and causes, the electrical effect around " microcosmic battery " electrode can make charged ion and the attached collection of colloid in the solution and be deposited on the electrode and remove; The Fe that reaction produces ²⁺, Fe ³⁺And hydrate has intensive adsorption-flocculation activity, forms cyan Fe (OH) especially under alkaline condition ₂And the Fe (OH) that obtains after the oxidation ₃Precipitation has the effect of intensive adsorption-flocculation, in addition, and Fe ²⁺, Fe ³⁺Can also bring into play precipitating action, can be removed by direct reaction as sulfur-containing anion, cyanide ion.Played the effect that reduces suspended substance and decolouring and raising biodegradability; " macroscopical battery " then is to add macroscopical cathode material such as graphite, coke, gac, coal cinder etc. in the iron filings to make the directly contact and forming of iron, raw material of wood-charcoal material, is equivalent to be subjected on the basis of micro-cell corrosion at iron filings, further strengthened corrosion or little electrolytic action.In this process, metal anode is corroded and consumes, and galvanic corrosion has simultaneously caused a series of related synergies again, thus the reaction of iron charcoal be flocculation, absorption, build bridge, roll up sweep, the result of multiple effect combined effects such as coprecipitated, galvanic deposit, electrochemical reduction.Because the pH value of molasses alcohol waste water is low, the packing layer that specific surface area is big in waste water and catalysis iron charcoal reactor contacts the extremely strong Fe of generation chemically reactive ²⁺Ion and hydrogen atom, the organism macromolecular structure that it destroys in the waste water makes it to decompose, degrade, and has obviously reduced Organic pollutants concentration.

Based on above-mentioned principle, purpose of the present invention is achieved by following technical solution: lay preliminary sedimentation tank, electrolyzer, in and coagulation basin, settling tank, each pond is communicated with in proper order, electrolyzer is divided into two Room, each installs a cover catalysis iron carbon reaction device, its structure is: lay aeration tube at the bottom of the pond respectively, all be communicated with the tube wall perforate with blower fan outside the pond; Pipeline top installing corrosion-proof steel framework, the PE plate of the perforate of mating formation on it is stacked packing layer on plate, and it is made up of the pebbles layer of bottom and coke, the sponge iron cross-stratum on top, is communicated with at the bottom of two Room.All lay suction pipe at the bottom of preliminary sedimentation tank and the settling tank pond, it is communicated with spiral pump outside the pond respectively.In and coagulation basin be divided into two Room, a chemical feed pipe is respectively adorned on top, all is communicated with chemicals dosing plant outside the pond; Be communicated with at the bottom of two Room, respectively establish aeration tube, all be communicated with the tube wall perforate with blower fan outside the pond.

Owing to adopt technique scheme, this device just makes that the molasses alcohol waste water pretreating effect is obvious, reduced Organic pollutants concentration, removed poisonous, the deleterious material of microorganism, improved the biodegradability of waste water, organism and suspended substance have also been had in various degree removal, reduced follow-up biological treatment load, mix with other lower concentration sugaring comprehensive wastewater again,, can obtain the waste water of qualified discharge through operations such as anaerobism, aerobic, precipitation, air supportings.And reduce running cost and reduce construction investment, simplify operational management, reduce labor intensity.

4, description of drawings:

Concrete structure of the present utility model by following drawings and Examples in advance to specify:

Fig. 1 is the Molasses alcohol sewage pre-treater system chart;

Fig. 2 is the preliminary sedimentation tank structural representation;

Fig. 3 is the electrolyser construction synoptic diagram;

Fig. 4 be in and coagulation basin, settling tank structural representation.

Legend: 1, preliminary sedimentation tank 2, blower fan 3, electrolyzer 4, chemicals dosing plant 5, in and coagulation basin 6, settling tank 7, sludge sump 8, outlet 9, pool wall 10, suction pipe 11, inlet 12, sponge iron 13, coke 14, pebbles layer 15, PE plate 16, framework 17, aeration tube 18, pore 19, communicating pipe 20, alkali chemical feed pipe 21, flocculation agent chemical feed pipe.

5, embodiment:

Embodiment: shown in Fig. 1-4, lay preliminary sedimentation tank 1, electrolyzer 3, in and coagulation basin 5, settling tank 6, each pond is communicated with in proper order.Electrolyzer 3 is divided into two Room, and each installs a cover catalysis iron carbon reaction device, and its structure is: lay horizontal aeration pipe 17 at the bottom of the chamber respectively, the outer blower fan 2 of this Guan Yuchi is communicated with, and evenly is laid with pore 18 along aeration tube 17 tube wall both sides.Pipe top installing corrosion-proof steel framework 16, mat formation on the framework 16 PE plate 15 of perforate, stack packing layer on it, the packing layer bottom is that bed thickness is the pebbles layer 14 of 500mm, account for the pond and hold 1/6, the pebbles individuality is divided into 4 grades from bottom to top and reduces, and is respectively 32-50mm, 25-32mm, 16-25mm, 8-16mm; Top is volume ratio 1: 1～coke 13 of 1: 2, the cross-stratum of sponge iron 12 alternate tiers row patterns, and its total thickness is 1200mm, accounts for the pond and holds 2/5, and coke 13 and all about 150mm of sponge iron 12 every bed thickness are communicated with communicating pipe 19 at the bottom of two Room.Suction pipe 10 is laid in preliminary sedimentation tank 1 and bottom, settling tank 6 pond, and it all is communicated with spiral pump outside the pond.In and coagulation basin pond 5 be divided into two Room, alkali chemical feed pipe 20 is established on Room top, flocculation agent chemical feed pipe 21 is established on another top, chamber, is communicated with chemicals dosing plant 4 outside the pond respectively, and liquid hydrogen sodium oxide and polymerize aluminum chloride are housed respectively in the chemicals dosing plant 4; Be communicated with at the bottom of two Room, respectively establish horizontal aeration pipe 17, all be communicated with, be laid with pore 18 on the tube wall with blower fan 2 outside the pond.

During operation, earlier molasses alcohol waste water is entered preliminary sedimentation tank 1, remove the macrobead suspended substance in the former water, flow into electrolyzer 3 through the waste water behind preliminary sedimentation tank 1 preliminary sedimentation, coke 13 in tart molasses alcohol waste water and the electrolyzer 3 and sponge iron 12 fillers are under the stirring action of an amount of air, multiple effects such as galvanic corrosion, flocculation, absorption, bridge formation, volume are swept, coprecipitated, galvanic deposit, electrochemical reduction take place, and produce combined effect.During waste water flows into then and coagulation basin Room 5 first under an amount of pneumatic blending effect that aeration tube 17 is discharged, add sodium hydroxide by alkali chemical feed pipe 20 earlier, regulate about this chamber waste water pH value to 7.8, make it be alkalescence.This chamber waste water enters another chamber then, adds polymerize aluminum chloride by flocculation agent chemical feed pipe 21 again, and every liter of waste water adds by the 300mg polymerize aluminum chloride.At last, waste water flows into settling tank 6, electrolyzer 3 reacted solid matters are sunk to the pond at the bottom of.So, but flow out with regard to the outlet 8 in autoprecipitation pond 6, be mixed into further processing of row with other lower concentration sugaring comprehensive wastewater again through pretreated waste water.Enter sludge sump 7 by spiral pump from the mud of preliminary sedimentation tank 1, settling tank 6 sucking-offs, outward transport after processing such as dehydration and drying.

In service, the aeration rate of control electrolyzer 3 is 1: 1～2: 1 with the wastewater volume ratio.If make oxygenant with potassium bichromate, the water outlet chemical oxygen demand COD cr that is measured is too high, then strengthens aeration rate, purges packing layer, to prevent sponge iron 12 surface passivations.

Above-mentioned electrolyzer 3 can increase in pairs according to the wastewater treatment needs.

This device also can be used for handling other and is rich in organism, and suspended substance is many, inorganic salt content height, colourity height, the high density pollution waste water that pH value is low.

Claims

1, a kind of Molasses alcohol sewage pre-treater, be laid with preliminary sedimentation tank, electrolyzer, in and coagulation basin, settling tank, each pond is communicated with in proper order, it is characterized in that: electrolyzer is divided into two Room, each installs a cover catalysis iron carbon reaction device, its structure is: lay aeration tube at the bottom of the chamber respectively, all be communicated with the tube wall perforate with blower fan outside the pond; Pipe top installing corrosion-proof steel framework, the PE plate of the perforate of mating formation on it is stacked packing layer on plate, it is made up of the pebbles layer of bottom and coke, the sponge iron cross-stratum on top, is communicated with at the bottom of two Room, and suction pipe is all laid in preliminary sedimentation tank and precipitation bottom, it is communicated with spiral pump outside the pond respectively, in and coagulation basin be divided into two Room, a chemical feed pipe is respectively adorned on top, all is communicated with chemicals dosing plant outside the pond, be communicated with at the bottom of two Room, respectively establish aeration tube, all be communicated with the tube wall perforate with blower fan outside the pond.

2, Molasses alcohol sewage pre-treater as claimed in claim 1, it is characterized in that: packing layer bottom pebbles bed thickness 500mm, account for the pond and hold 1/6, pebbles individuality from bottom to top is divided into 4 grades and reduces, and is respectively 32-50mm, 25-32mm, 16-25mm, 8-16mm; Top coke, sponge iron alternate tiers row pattern are formed cross-stratum, coke, sponge iron volume ratio 1: 1～1: 2, and cross-stratum total thickness 1200mm accounts for the pond and holds 2/5, and the every bed thickness of coke and sponge iron is 150mm.

3, Molasses alcohol sewage pre-treater as claimed in claim 1 is characterized in that: liquid hydrogen sodium oxide and polymerize aluminum chloride are housed respectively in the chemicals dosing plant.

4, Molasses alcohol sewage pre-treater as claimed in claim 1 is characterized in that: electrolyzer is to be provided with in pairs.