CN100366547C

CN100366547C - Production of water-purifying agent for papermaking sewage

Info

Publication number: CN100366547C
Application number: CNB2005100946936A
Authority: CN
Inventors: 戴福寿
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-10-01
Filing date: 2005-10-01
Publication date: 2008-02-06
Anticipated expiration: 2025-10-01
Also published as: CN1778703A

Abstract

The present invention relates to a manufacturing method of a water purifying agent for paper manufacturing sewage, which mainly solves the problems of high paper manufacturing sewage treatment cost, disability of reaching the standard after treatment and disability of the comprehensive utilization of settlement in the prior art. The manufacturing method of a water purifying agent for paper manufacturing sewage comprises the following manufacturing steps: (a) after 3 to 5 portions by weight of swell soil, 2 to 4 portions by weight of bauxite, 1 to 3 portions by weight of kaolinum and 1 to 2 portions by weight of diatomite are mixed, the mixture is washed by water; (b) upper layer emulsion slurry after a water washing process is changed into a solid by a filter pressing process, 5 to 7 portions of solid after the filter pressing process and zeolite powder are mixed, acid solution is added into the mixture of the solid and the zeolite powder, the mixture is uniformly stirred, and a placing process lasts for 16 to 24 hours at the temperature of 40 DEG C to 60 DEG C; (c) the mixture placed for 16 to 24 hours is washed by the water until the pH value of the mixture is from 5 to 8; (d) the finished product of the present invention can be obtained by drying, pulverizing and packaging the mixture. The finished product has the advantages of strong adsorption, strong coagulation, small consumption, low sewage treatment cost, obvious effect, high coagulating and precipitating speed and thorough sewage treatment. Tail water can be circularly utilized, and the settlement can be directly used for paper manufacture.

Description

The making method of water-purifying agent for papermaking sewage

Technical field

The present invention relates to the making method of the water purification agent that a kind of sewage disposal uses, be specifically related to the making method of the water purification agent that a kind of papermaking wastewater handles.

Background technology

At present, the paper-making industry majority of China is still based on papermaking straw pulp, though the treated emission request that do not reach that the sewage in paper mill has, the middle or small paper mill that has does not add processing because of cost of sewage disposal is too high and promptly enters rivers, cause China's water resources severe contamination, the deterioration of the ecological environment.Though country has taked some pollution treatment measures, can not be from deal with problems at all.

In the existing paper making sewage processing method, there is employing in settling tank, to add 1 ‰ poly aluminium chloride, makes sewage produce flocculation, precipitation.Higher because of the poly aluminium chloride price, cost of sewage disposal is also higher, and treatment effect is undesirable, does not still reach emission request.Burning is reclaimed alkaline process and is handled black liquid, and this method investment is big, the working cost height.The employing polymeric ferric salt that also has, alkaline material, polyacrylamide etc. are main raw material, be added in the papermaking wastewater by a certain percentage, by caking ability and the molecular structure that cracks black liquor, make that compositions such as xylogen in the black liquid, hemicellulose, silicon-dioxide decompose, precipitating, grain slag separates.This method can make the COD of upper water remove 80%, but sediment can not fully utilize.

Summary of the invention

In order to solve papermaking wastewater processing cost height in the prior art, can not be up to standard after the processing that has and sediment can not problem of complex utilization, the invention provides a kind of making method of papermaking wastewater water purification agent, its water purification agent that makes can make the papermaking wastewater after the processing reach emission request, processing cost is low, and sediment can fully utilize.

The present invention solves the technical scheme that its technical problem is taked: a kind of making method of water-purifying agent for papermaking sewage is characterized in that:

(a), by weight with wilkinite 3-5 part, bauxitic clay 2-4 part, kaolin 1-3 part, diatomite 1-2 part is mixed after washing;

(b), the upper strata serum press filtration after will washing becomes solid, the solid 5-7 part after the filter of pressure is by weight mixed with zeolite powder 3-5 part, the adding acid solution stirs in mixture, placement is 16-24 hour under 40 ℃-60 ℃ temperature;

(c), will be washed to pH value through 16-24 hour mixture of placement is 5-8;

(d), drying, pulverizing, packing are finished product of the present invention.

The making method of described water-purifying agent for papermaking sewage is characterized in that:

(a), by weight with wilkinite 3-4 part, bauxitic clay 2-3, kaolin 1-2 part, diatomite 1-1.5 mixes after washing;

(b), the upper strata serum press filtration after will washing becomes solid, the solid 6-6.5 part after the filter of pressure is by weight mixed with zeolite powder 3-4 part, adds acid solution again and stir in mixture, placement is 16-24 hour under 40 ℃-60 ℃ temperature;

(c), will be washed to pH value through 16-24 hour mixture of placement is 5-8;

(a), by weight with wilkinite 4-5 part, bauxitic clay 3-4 part, kaolin 2-3 part, diatomite 1.5-2 part is mixed after washing;

(b), the upper strata serum press filtration after will washing becomes solid, the solid 6.5-7 part after the filter of pressure is by weight mixed with zeolite powder 4-5 part, adds acid solution again and stir in mixture, placement is 16-24 hour under 40 ℃-60 ℃ temperature;

(c), will be washed to pH value through 16-24 hour mixture of placement is 5-8;

Described acid solution is a sulphuric acid soln, and its concentration is 5%-15%, and add-on is the 1-3% of mixture weight.

The fineness of described zeolite powder is the 100-300 order.

Beneficial effect of the present invention: adsorptivity, coacervation are extremely strong, and minimum usage ratio is 5/1000ths, and usage quantity is few, and cost of sewage disposal is low.Effect is obvious, and coacervation, sedimentation speed are fast, and sewage disposal is thorough, the tail water reusable edible.Sediment can be directly used in papermaking, handles sewage per ton, can increase economic benefit more than the monobasic to enterprise.

Embodiment

Embodiment one:

(a), by weight get 3 parts of wilkinites, 2 parts of bauxitic clays, 1 part of kaolin, 1 part in diatomite, is prepared 700 kilograms of composite soils by 100 kilograms every part.Wash in composite soil and 1: 1 ratio of water;

(b), the upper strata serum press filtration after will washing becomes solid, 5 parts of the solids that pressure is by weight filtered, 100 kilograms every part, promptly 500 kilograms, being 400 kilograms for 4 parts with 100 order zeolite powders mixes, be mixed with 900 kilograms of mixtures, adding concentration by the weight 1% of mixture again is that 15% acid solution stirs, and places 16 hours under 60 ℃ temperature;

(c), will the mixture through placing 16 hours being washed to pH value is 5.5;

Embodiment two:

(a), by weight get 5 parts of wilkinites, 4 parts of bauxitic clays, 3 parts of kaolins, 2 parts in diatomite, is prepared 1400 kilograms of composite soils by 100 kilograms every part.Wash in composite soil and 1.5: 1 ratio of water;

(b), the upper strata serum press filtration after will washing becomes solid, 7 parts of the solids that pressure is by weight filtered, 100 kilograms every part, promptly 700 kilograms, being 500 kilograms for 5 parts with 200 order zeolite powders mixes, be mixed with 1200 kilograms of mixtures, adding concentration by the weight 3% of mixture again is that 5% acid solution stirs, and places 24 hours under 40 ℃ temperature;

(c), will the mixture through placing 24 hours being washed to pH value is 7.5;

Embodiment three:

(a), by weight get 4 parts of wilkinites, 3 parts of bauxitic clays, 2 parts of kaolins, 1.5 parts in diatomite, is prepared 1050 kilograms of composite soils by 100 kilograms every part.Wash in composite soil and 1.5: 1 ratio of water;

(b), the upper strata serum press filtration after will washing becomes solid, 6 parts of the solids that pressure is by weight filtered, 100 kilograms every part, promptly 600 kilograms, being 400 kilograms for 4 parts with 300 order zeolite powders mixes, be mixed with 1000 kilograms of mixtures, adding concentration by the weight 2% of mixture again is that 10% acid solution stirs, and places 20 hours under 50 ℃ temperature;

(c), will the mixture through placing 20 hours being washed to pH value is 6;

The prepared water purification agent of the present invention is water insoluble, and is nontoxic, has extremely strong adsorptivity, goes flavor property, decolourising property and coherency.The consumption of water purification agent: papermaking wastewater per ton adds 0.5-1.5 ‰ (weight permillage).General concentration sewage does not need to add auxiliary, uses the back papermaking wastewater layering can occur very soon, and precipitation is fast.Because fiber, filler in the papermaking tail water are adsorbed, coacervation precipitates, the SS value of tail water reduces greatly, and COD is had obvious Decomposition.The stink of tail water is adsorbed in the present invention, makes tail water reach national 1-2 level emission standard.In addition, the paper fiber in the sediment accounts for more than 70% of sediment volume, can add by a certain percentage and continue papermaking in the paper pulp, saves the papermaking starting material, non-secondary pollution.After the processing of papermaking tail water is up to standard, also can recycle repeatedly, can save a large amount of water sources.

Claims

1. the making method of a papermaking wastewater water purification agent is characterized in that:

(1), by weight with wilkinite 3-5 part, bauxitic clay 2-4 part, kaolin 1-3 part, diatomite 1-2 part is mixed after washing;

(2), the upper strata serum press filtration after will washing becomes solid, solid 5-7 part after the filter of pressure is by weight mixed with zeolite powder 3-5 part, adding sulphuric acid soln in mixture stirs, under 40-60 ℃ temperature, placed 16-24 hour, the concentration of described sulphuric acid soln is 5-15%, and add-on is the 1-3% of mixture weight;

(3), will be washed to pH value through 16-24 hour mixture of placement is 5-8;

(4), drying, pulverizing, packing are the papermaking wastewater water purification agent.

2. the making method of papermaking wastewater water purification agent according to claim 1 is characterized in that:

(1), by weight with wilkinite 3-4 part, bauxitic clay 2-3 part, kaolin 1-2 part, diatomite 1-1.5 part is mixed after washing;

(2), the upper strata serum press filtration after will washing becomes solid, the solid 6-6.5 part after the filter of pressure is by weight mixed with zeolite powder 3-4 part, adds sulphuric acid soln again and stir in mixture, placement is 16-24 hour under 40-60 ℃ temperature;

(3), will be washed to pH value through 16-24 hour mixture of placement is 5-8;

3. the making method of papermaking wastewater water purification agent according to claim 1 is characterized in that:

(1), by weight with wilkinite 4-5 part, bauxitic clay 3-4 part, kaolin 2-3 part, diatomite 1.5-2 part is mixed after washing;

(2), the upper strata serum press filtration after will washing becomes solid, the solid 6.5-7 part after the filter of pressure is by weight mixed with zeolite powder 4-5 part, adds sulphuric acid soln again and stir in mixture, placement is 16-24 hour under 40-60 ℃ temperature;

(3), will be washed to pH value through 16-24 hour mixture of placement is 5-8;

4. the making method of papermaking wastewater water purification agent according to claim 1, the fineness that it is characterized in that described zeolite powder is the 100-300 order.