CN103449638A - Activated carbon production wastewater treatment method - Google Patents
Activated carbon production wastewater treatment method Download PDFInfo
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- CN103449638A CN103449638A CN2013104227842A CN201310422784A CN103449638A CN 103449638 A CN103449638 A CN 103449638A CN 2013104227842 A CN2013104227842 A CN 2013104227842A CN 201310422784 A CN201310422784 A CN 201310422784A CN 103449638 A CN103449638 A CN 103449638A
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Abstract
The invention discloses an activated carbon production wastewater treatment method, through which production wastewater is treated and then recycled and the treatment efficiency is improved. According to the method, wastewaters from three sources are treated in different, and the three types of wastewater include gas washing tower wastewater produced after phosphoric acid- containing water vapor is absorbed by using water in a gas washing tower, rinsing wastewater produced when activated carbon semi-finished products are rinsed by using water so as to remove a phosphoric acid and/or other activators, and workshop wastewater produced by scouring the ground and cooling materials in workshops. The method comprises the following steps: 1) feeding the rinsing wastewater into a carbon settling pond and reducing the content of carbon powder in the wastewater; 2) introducing the gas washing tower wastewater and the rinsing wastewater discharged from the carbon settling pond to a transfer pond, and mixing; 3) introducing water from the transfer pond to a neutralization pond, and stirring for neutralizing the water in the neutralization pond by using lime milk; 4) introducing the neutralized wastewater and the workshop wastewater to a second settling pond, and settling the mixed wastewater so as to obtain purified water; 5) transferring the purified water to a reuse pond.
Description
Technical field
The present invention relates to water treatment field, be specifically related to a kind of process for treating industrial waste water.
Background technology
In applicant enterprise, be engaged in the production of producing gac from plant waste.These plant wastes comprise that corn cob, maize straw, cotton stalk etc. were extracted useful component or take its residue remaining after the raw material production chemical, for example, remaining residue from corn cob prepares furfural or wood sugar, from corn cob extracted hemicellulose and and Mierocrystalline cellulose remaining residue, the residue from cotton stalk prepares furfural.These plant wastes still contain a large amount of carbon components, therefore can also be used to produce gac, realize that waste resource takes full advantage of on the one hand, reduce on the other hand the consumption to timber or coal.
The applicant can produce a large amount of waste water in process of production, mainly contain the waste water in three kinds of sources: 1) poaching wastewater, this waste water is that the gac work in-process are carried out to rinsing, and to remove, phosphoric acid wherein and other activators produced, and wherein contains a certain amount of phosphoric acid reclaimed that is unworthy; 2) scrubber tower waste water, in dry link, a part of phosphoric acid in material is taken out of by water, need in scrubber tower, absorb this water vapour for water, to sponge phosphoric acid wherein; 3) workshop waste water, as wash away waste water after mill floor and, for cooling water, this part waste water relative clean, do not contain phosphoric acid.The existing method of applicant is focused on the waste water in each workshop, first after preliminary sedimentation tank is processed, then, through the lime neutralizing treatment, the waste water after neutralizing treatment is done sedimentation through settling tank successively and processed, and the waste water after processing can directly efflux.
And above-mentioned Activated Carbon Production waste water treatment process is too simple and crude extensive, waste water does not pass through cycling and reutilization, and water consumption is larger, causes production cost to improve; In waste water after neutralization still with a large amount of throw outs such as calcium phosphate after operation for some time, accumulation of precipitates in settling tank, not only affected sedimentation effect, also caused sediment to be difficult to the problems such as cleaning.
Summary of the invention
Therefore the present invention proposes a kind of method of processing Activated Carbon Production waste water, with by recycle after production wastewater treatment, and improves processing efficiency.
Method for the treatment of Activated Carbon Production waste water of the present invention is done different treatment to the waste water in three kinds of sources, and these three kinds of waste water comprise: scrubber tower waste water, the waste water produced after water absorption of phosphorus sour water steam in scrubber tower; Poaching wastewater, the waste water that water rinse-active carbon semiproduct produces to remove phosphoric acid and/or other activators; Workshop waste water washes away the waste water that ground and cooling material produce in workshop, the treating method comprises following step: 1) poaching wastewater is introduced to the charcoal settling tank, reduced the powdered carbon content in waste water; 2) scrubber tower wash water and the poaching wastewater that comes from the charcoal settling tank are introduced to the transfer pond; 3) water in the transfer pond is introduced to neutralization tank, with milk of lime, stir neutralization; 4) waste water and above-mentioned workshop waste water after neutralization are introduced to the second settling tank, precipitated, be purified water; 5) described purifying waste water is transferred to a reuse pool.
The present invention introduces the Activated Carbon Production waste water of different sources in the different links for the treatment of scheme, alleviated processing load and supplies consumption, has improved processing efficiency.The waste water of processing by the method can recycle, avoids to environmental emission.
The accompanying drawing explanation
Fig. 1 is the process flow sheet of the inventive method exemplary embodiments.
Embodiment
Method of the present invention comprises:
Step 1: poaching wastewater is introduced to thin charcoal settling tank, reduce the powdered carbon content in waste water;
Step 2: scrubber tower wash water and the poaching wastewater that comes from thin charcoal settling tank are introduced to the transfer pond, mixed;
Step 3: the water in the transfer pond is introduced to neutralization tank, with milk of lime, stir neutralization;
Step 4: waste water and above-mentioned workshop waste water after neutralization are introduced to the second settling tank, precipitated, be purified water;
Step 5: described purifying waste water is transferred to a reuse pool.
In step 1, the waste water after the rinse-active carbon semiproduct is standing in thin charcoal settling tank, and the thin charcoal particle overwhelming majority be suspended in water precipitates, and the gac precipitated is regularly collected and reuse.The water outlet of settling tank preferably is arranged on higher position, the thin charcoal particle that while making water flow out, disturbance precipitates as few as possible.Can also a filtration unit be set at water outlet, prevent that thin charcoal particle from flowing out settling tank, like this can be so that water stops the shorter time in this settling tank.
In step 2, the scrubber tower wash water mixes in the transfer pond with the poaching wastewater that comes from thin charcoal settling tank, and the waste water in these two kinds of sources contains the phosphoric acid of different concns, is introduced into the transfer pond, can detect its acid concentration, for the introduction volume of determining lime in next step provides foundation.In addition, in previous step, the thin charcoal particle of precipitation can be in the situation that (at settling tank, not establishing filtration unit) further do not precipitated in this transfer pond yet fully.
In step 3, waste water is introduced into neutralization tank from the transfer pond, add unslaked lime to be stirred, can be quantitative to lime according to the acid content recorded in the transfer pond, waste water is adjusted to pH value and is at least 7.0, preferably the pH value is controlled between 8.8-9.2, in this scope, both fully consume phosphoric acid wherein, and be unlikely to again to make alkali excessive in a large number, caused new pollution.In step 4, the waste water of process neutralization reaction can mix with workshop waste water, is transported to the second settling tank, before input the second settling tank, preferably adds flocculation agent, and calcium phosphate and other materials of impelling neutralization reaction to produce fully precipitate in the second settling tank.Calcium phosphate and other deposition of solids are got off, and the water on upper strata has reached reuse standard, are transferred to water storage tower, transfer to production plant from water storage tower and reuse.The second settling tank is a plurality of inclined-plate clarifying basins that are set up in parallel preferably.The sediment given off in inclined-plate clarifying basin, because containing more phosphoric acid salt, can be done fertilizer or material of construction etc.
Fig. 1 illustrates the typical flowchart of the inventive method.
Claims (4)
1. a method of processing Activated Carbon Production waste water, described waste water has three kinds of sources, comprising: scrubber tower waste water, the waste water produced after water absorption of phosphorus sour water steam in scrubber tower; Poaching wastewater, the waste water that water rinse-active carbon semiproduct produces to remove phosphoric acid and/or other activators; Workshop waste water washes away the waste water that ground and cooling material produce in workshop, the treating method comprises following step:
Step 1: poaching wastewater is entered to thin charcoal settling tank, reduce the powdered carbon content in waste water;
Step 2: scrubber tower wash water and the poaching wastewater that comes from thin charcoal settling tank are introduced to the transfer pond, mixed;
Step 3: the water in the transfer pond is introduced to neutralization tank, with milk of lime, stir neutralization;
Step 4: the waste water after neutralization and above-mentioned workshop waste water are introduced to the second settling tank and precipitated, be purified water;
Step 5: described purifying waste water is transferred to a reuse pool.
2. the method for claim 1, in step 3, be controlled at 8.8-9.2 by the pH value.
3. the method for claim 1, in step 4, described the second settling tank is inclined-plate clarifying basin.
4. the method for claim 1 in step 4, before introducing described the second settling tank, adds flocculation agent in waste water.
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| CN2013104227842A CN103449638A (en) | 2013-09-16 | 2013-09-16 | Activated carbon production wastewater treatment method |
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| CN2013104227842A CN103449638A (en) | 2013-09-16 | 2013-09-16 | Activated carbon production wastewater treatment method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110745989A (en) * | 2019-10-25 | 2020-02-04 | 湖南中冶长天节能环保技术有限公司 | Activated carbon flue gas purification acid-making wastewater zero-discharge process and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103086542A (en) * | 2013-01-29 | 2013-05-08 | 福建省鑫森炭业股份有限公司 | Recycling process and system for wooden activated carbon industrial wastewater |
| CN203007065U (en) * | 2012-12-07 | 2013-06-19 | 福建省鑫森炭业股份有限公司 | Treatment and reclamation system for active carbon production wastewater |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203007065U (en) * | 2012-12-07 | 2013-06-19 | 福建省鑫森炭业股份有限公司 | Treatment and reclamation system for active carbon production wastewater |
| CN103086542A (en) * | 2013-01-29 | 2013-05-08 | 福建省鑫森炭业股份有限公司 | Recycling process and system for wooden activated carbon industrial wastewater |
Non-Patent Citations (2)
| Title |
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| 刘光良等: "木质活性炭生产废水的处理及氯化锌的回收", 《环境科学》, vol. 6, no. 5, 31 December 1985 (1985-12-31), pages 61 - 62 * |
| 刘光良等: "氯化锌法活性炭生产废水处理及回收利用的研究", 《林产化学与工业》, no. 4, 31 December 1984 (1984-12-31), pages 20 - 27 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110745989A (en) * | 2019-10-25 | 2020-02-04 | 湖南中冶长天节能环保技术有限公司 | Activated carbon flue gas purification acid-making wastewater zero-discharge process and system |
| CN110745989B (en) * | 2019-10-25 | 2022-02-18 | 湖南中冶长天节能环保技术有限公司 | Activated carbon flue gas purification acid-making wastewater zero-discharge process and system |
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Application publication date: 20131218 |