CN100999370A - Treatment method of high alkalinity organic waste water - Google Patents
Treatment method of high alkalinity organic waste water Download PDFInfo
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- CN100999370A CN100999370A CN 200710001043 CN200710001043A CN100999370A CN 100999370 A CN100999370 A CN 100999370A CN 200710001043 CN200710001043 CN 200710001043 CN 200710001043 A CN200710001043 A CN 200710001043A CN 100999370 A CN100999370 A CN 100999370A
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Abstract
This invention relates to industrial waste water treatment method, particularly a high alkalinity organic wastewater treatment method; it solve the existing technology problem of high alkalinity organic wastewater treatment difficulties and high costs, and provide a simple, low cost method that also can handle fume waste. The method includes the following steps: absorb and neutralize the wastewater through mass transfer equipment; after neutralization the wastewater by the biological treatment can achieve discharge standards. This invention use boiler flue gas to neutralize residual alkali, low investment, low cost, could also eliminate SO2 and CO2 of the smoke; and through the process the PH of wastewater can be controlled between five to nine, not wastewater dilution, useful for choice of follow-up treatment. It provides a new technical method for high residual alkali wastewater treatment. Greatly reduce the scale wastewater treatment operating costs.
Description
Technical field
The present invention relates to processing method of industrial waste water, especially a kind of treatment method of high alkalinity organic waste water.
Background technology
As everyone knows, high alkalinity organic waste water is handled, and under the situation that can not do the alkali recovery, it is the key of subsequent treatment process that neutralization removes alkali, the method that is adopted in the society adds the acid neutralization and makes the business processes cost increase nothing more than being to add methods such as acid (spent acid) neutralization, dilute with water at present; Thin up then makes subsequent treatment process be restricted again.Thereby in the treatment process of high alkalinity organic waste water as ramie takes off waste water, the science of the neutralization method of alkali has restricted enterprise to the waste water treatment Scheme Selection.
The waste water that produces with ramie processing is example, and the ramie processing industry provides good textile raw material for textile industry, and China is the ramie plantation the biggest in the world and the country of processing industry, and annual production accounts for 80% of Gross World Product.Along with reform and opening-up stretch into and the world market to the increase of ramie product demand, China's ramie textile industry constantly enlarges.The main fiber crops district that produces is newly-built and extended many ramie textiles enterprise in China south.Document announcement is arranged, the domestic throughput of producing 25 ten thousand tons of degummed ramies per year that had to 2004.Produce about 60m to produce degummed ramie per ton
3High density degumming waste water meter, then annual degumming waste water quantity discharged reaches 1,500 ten thousand m
3, about 150,000 tons of the annual emissions of COD.
What the present domestic application of China grass degumming production was more is that alkaline process comes unstuck, and generally passes through pickling, washing, and one boils, washing, two boil, and fiber crops are copied in washing, bleaching, pickling, operations such as washing, each procedure all can produce a certain amount of waste water.And one boil in these waste water, two boil waste water (being generically and collectively referred to as boiled-off waste water) concentration height, and intractability is big.The main water-quality guideline of ramie boiled-off waste water: basicity (ph12-14), colourity (10000-20000 degree), COD (15000-22000mg/L), temperature height (50-65 degree centigrade), complicated component (mainly contains xylogen, Mierocrystalline cellulose, hemicellulose, pectin substance, polymer organism such as fatty wax).
It often will be in boiled-off waste water and pickling waste water and the pickling waste waters and back to be mixed with other waste water handle with biological method that traditional ramie-degumming waste water is handled.The processing of these routines all is difficult to reach the ideal treatment effect, realizes that qualified discharge rarely has report especially.
Summary of the invention
The objective of the invention is to handle difficulty for solving above-mentioned high alkalinity organic waste water, the problem that cost is high provides a kind of simple, with low cost, can handle the treatment method of high alkalinity organic waste water of smoke exhaust simultaneously.
The present invention adopts SO in enterprise's boiler combustion waste gas
2, CO
2, NO
xDeng in the acidic oxide and the residual alkali in the waste liquid reducing PH, and then carry out treatment process with biochemical method (aerobic/anaerobic method).
The present invention's technological method that is adopted of dealing with problems is:
C. waste water through mass transfer apparatus absorb in and waste water in alkali lye;
But D. and after waste water standard discharge after biochemical treatment.
Described mass transfer apparatus is absorption tower of the prior art, cuvette, packing tower, Venturi scrubber etc.
Described biochemical treatment is the aerobic/anaerobic method.Described biochemical treatment is that oxygen/aerobic method is meant that anaerobic treatment adopts UASB technology (upflow anaerobic sludge blanket reactor), aerobic contact oxidation tower (pond), UNITANK treatment process, the tertiary oxidation pool etc.
Before the C.D step, can also comprise the A step:
A: remove the flue dust in the waste gas more than 70% with cleaning apparatus of the prior art.
Preferably remove the flue dust in the waste gas more than 80%.
Before the C.D step, can also comprise the B step:
B: spent air temperture is reduced to below 200 ℃.
Furtherly: technical scheme of the present invention is as follows:
(dust removal efficiency must be more than 80% when absorbing with packing tower more than 70% with flue dust removal in the flue gas with common fly-ash separator, with in the Venturi scrubber and the time can not deal with), by cooling flue-gas temperature control is below 200 ℃, with in the absorption tower and the time, empty tower gas velocity be controlled at the general speed of gas below; Generally speaking, can be controlled at flue gas flow rate between the 1.5m/s-3.0m/s, vapour-liquid ratio is controlled between the 1.5-4.0; When adopting Venturi scrubber, throat's gas velocity can be controlled between the 20m/s-40m/s, and vapour-liquid ratio is controlled between the 0.8-2.0, can obtain dedusting and neutral double effects simultaneously.When coal contains the S amount more than 3% or as flue gas SO
2, CO
2, No
xContent can adopt simple gravity spray washer to carry out neutralizing treatment when (weight ratio) more than 6 ‰, and gas-liquid contact time is controlled at 0.5-1.0 between second; Then this moment, flue gas did not need to do any pre-treatment.
During boiler smoke absorbs through mass transfer apparatus through dedusting cooling back and waste water and behind the alkali lye in the waste water, detect, pH value gets final product between 6-7.5, with the waste water after the neutralization through biochemical treatment, through biochemical treatment (aerobic/anaerobic) but back waste water standard discharge: but waste gas passes through flue dust behind the mass transfer apparatus, SO2 standard discharge.Can also effectively eliminate CO2 isothermal chamber gas, prevent global warming. in real work, also can save the technology of dedusting cooling according to circumstances.
Effect of the present invention is: with in the boiler smoke and residual alkali, invest for a short time, cost is low, can receive simultaneously in the flue gas except that SO
2And CO
2Remove triple effects of alkali with waste water, in the waste water N-process pH value can the people for being controlled between 5～9, waste water is not diluted, be beneficial to the selection of subsequent treatment process, a new processing method is provided for high residual alkali waste water processing.Reduced scale wastewater treatment operating costs greatly.
Description of drawings
Fig. 1 is a schema of the present invention.
Embodiment
Further specify the present invention below in conjunction with embodiment, but not as a limitation of the invention.
This example adopt Venturi scrubber do in the mass transfer apparatus and waste water in basicity, flue gas 1 is without (dedusting, cooling) any pre-treatment, absorb processing with waste water 5 through Venturi scrubber (mass transfer apparatus 4), Venturi throat design gas speed is 30m/s, vapour-liquid ratio is 1.4, waste water PH reduces between the 5.5-6.5 from about 13, and waste water after handle on the tertiary oxidation pool, can reach national secondary discharge standard through air supporting processing, anaerobic treatment.
In conjunction with Fig. 1 schema of the present invention, the common fly-ash separator of flue gas 1 usefulness is removed flue dust in the flue gas more than 70%, and in absorbing through absorption tower (mass transfer apparatus 4) with waste water 5 and the alkali lye in the waste water, empty tower gas velocity is controlled at below the general speed of gas; Generally speaking, can be controlled at flue gas flow rate between the 1.5m/s-3.0m/s, vapour-liquid ratio is controlled between the 1.5-4.0; Waste water PH can reduce between the 7.5-8.5 from about 14, and anaerobic waste water is handled and adopted UASB technology, and upflow velocity is 1m/s, and aerobic treatment adopts the UNITANK treatment process, and retention time of sewage is 16 hours, but waste water standard discharge after treatment; But waste gas is through standard discharge behind the mass transfer apparatus 4.
In conjunction with Fig. 1 schema of the present invention, the common fly-ash separator of flue gas 1 usefulness is removed flue dust in the flue gas more than 80%, 3 flue-gas temperature control is below 140 ℃ by lowering the temperature, in absorbing through packing towers 4 with waste water 5 and the residual alkali in the waste water, packing tower adopts ceramic Pall ring, packing layer thickness 3.5m, superficial velocity 2.5m/s, specific liquid rate is 2.5L/m3, and the waste water pH value drops to about 8 from 14.Anaerobic waste water is handled and is adopted UASB technology, and upflow velocity is 1m/s, handles through the tertiary oxidation pool after the anaerobic treatment again, and retention time of sewage is 20 days, and efflux wastewater COD value＜150mg/l can reach national secondary discharge standard.
Embodiment 4
3 flue-gas temperature control is to use Venturi scrubber below 200 ℃ by lowering the temperature, throat's gas velocity can be controlled between 20m/s～40m/s, and vapour-liquid ratio is controlled between the 1.0-2.6, can obtain dedusting and neutral double effects simultaneously.
Claims (5)
1. a treatment method of high alkalinity organic waste water comprises the steps:
C. waste water through mass transfer apparatus absorb in and waste water in alkali lye;
But D. and after waste water standard discharge after biochemical treatment.
2. according to the described treatment method of high alkalinity organic waste water of claim 1, it is characterized in that, before the C.D step, also comprise the A step:
A: remove the flue dust in the waste gas more than 70% with cleaning apparatus.
3. according to the described treatment method of high alkalinity organic waste water of claim 2, it is characterized in that described A step is removed the flue dust in the waste gas more than 80%.
4. according to the described treatment method of high alkalinity organic waste water of claim 1, it is characterized in that, before the C.D step, also comprise the B step:
B: spent air temperture is reduced to below 200 ℃.
5. according to the arbitrary described treatment method of high alkalinity organic waste water of claim 1-4, it is characterized in that described mass transfer apparatus is absorption tower, cuvette, packing tower, Venturi scrubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710001043 CN100999370A (en) | 2007-01-22 | 2007-01-22 | Treatment method of high alkalinity organic waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710001043 CN100999370A (en) | 2007-01-22 | 2007-01-22 | Treatment method of high alkalinity organic waste water |
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|---|---|
| CN100999370A true CN100999370A (en) | 2007-07-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353341A (en) * | 2014-10-25 | 2015-02-18 | 傅小娟 | Sludge incineration flue gas treatment method and equipment |
| CN104353340A (en) * | 2014-10-25 | 2015-02-18 | 陈列鑫 | Purifying and recycling method and equipment for flue gas generated after sludge incineration |
| CN105347595A (en) * | 2015-12-04 | 2016-02-24 | 李兴高 | Printing and dyeing wastewater treatment method and device |
| CN106457184A (en) * | 2014-01-21 | 2017-02-22 | 依诺维公司 | Facility for treatment of aqueous effluent by hydrothermal oxidation |
| CN110002637A (en) * | 2019-05-14 | 2019-07-12 | 重庆三峰科技有限公司 | A kind of membranous system produces water PH call-back device and its technique |
-
2007
- 2007-01-22 CN CN 200710001043 patent/CN100999370A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106457184A (en) * | 2014-01-21 | 2017-02-22 | 依诺维公司 | Facility for treatment of aqueous effluent by hydrothermal oxidation |
| CN104353341A (en) * | 2014-10-25 | 2015-02-18 | 傅小娟 | Sludge incineration flue gas treatment method and equipment |
| CN104353340A (en) * | 2014-10-25 | 2015-02-18 | 陈列鑫 | Purifying and recycling method and equipment for flue gas generated after sludge incineration |
| CN105347595A (en) * | 2015-12-04 | 2016-02-24 | 李兴高 | Printing and dyeing wastewater treatment method and device |
| CN110002637A (en) * | 2019-05-14 | 2019-07-12 | 重庆三峰科技有限公司 | A kind of membranous system produces water PH call-back device and its technique |
| CN110002637B (en) * | 2019-05-14 | 2023-12-19 | 重庆三峰科技有限公司 | Membrane system produced water pH callback device and technology thereof |
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