CN1242343A - Equipment and process specially for paper-making with no drainage of wastewater - Google Patents
Equipment and process specially for paper-making with no drainage of wastewater Download PDFInfo
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- CN1242343A CN1242343A CN 98110966 CN98110966A CN1242343A CN 1242343 A CN1242343 A CN 1242343A CN 98110966 CN98110966 CN 98110966 CN 98110966 A CN98110966 A CN 98110966A CN 1242343 A CN1242343 A CN 1242343A
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Abstract
The present invention discloses a technology for paper-making waste water zero discharge and its special equipment. The waste water zero discharge technology includes waste water recovery, filtering, regulating pH value, stirring, passing through circulating pump to use the recovered water for paper making in washing blanket and flushing net and at the same time make-up the consumed water. The special equipment is a regulating cyclic tank which is composed of tank body, stirrer and circulating pump. The advantages include: resolves the problem of environmental pollution, saving water resource and reducing investment in equipment.
Description
The present invention relates to a kind of paper-making effluent treating process and special facilities, also is that closed cycling use of water technology of papermaking and special facilities are relevant with paper making wastewater zero discharge technique and special facilities especially.
The main method of both at home and abroad paper waste being handled is the precipitator method, air supporting method, biochemical process etc. at present, and these methods have played certain effect for the pollution that reduces paper waste.But also there is following deficiency: the one, the abatement equipment investment in fixed assets is big, the present domestic air supporting method of using, precipitation France and Japan handles 5000-10000 ton waste water, and it administers making an investment in more than 1,500,000 yuan of paper waste, and the biochemical process investment is bigger; The 2nd, the running cost height, wastewater treatment working cost per ton is a 0.40-1.00 unit; The 3rd, the water of administering the back discharging remains sewage, only reaches emission standard; The 4th, middle-size and small-size paper plant because of the investment and running cost big, economic benefit is not good; The 5th, ton paper water loss is between the 60-100 ton, and water resource waste and wastewater discharge are surprising.
The purpose of this invention is to provide a kind of paper-making effluent treating process and facility that can make paper waste reach zero release, in whole paper process, realize the paper technology water fully and wash blanket towards the operation of net water closed circulation, non-wastewater discharge.
For achieving the above object, the present invention is achieved through the following technical solutions.To paper making wastewater zero discharge technique: a; the waste water that each link in the paper-making process gives off is all unified to reclaim; b; by filtering the suspended substance that reduces in the recycle-water; c; pH value with neutral method control recycle-water; reach the degree of reuse again; d; with agitator the water of regulating in the circulatory pool is stirred; e; will be through above-mentioned filtration; the neutralization and the water of stir process again by recycle pump as the paper technology water with wash blanket and recycle with water cycle towards net; f; replenish in the paper-making process and be evaporated and the used up water yield of papermaking g; retaining during by water yield variation in the adjusting circulatory pool adjusting paper-making process and shutdown.
Special facilities to paper making wastewater zero discharge technique---regulate circulatory pool, form by pond body, agitator and recycle pump, pond body bulk size according to guarantee in paper-making process or stopped status under lack of water does not take place or the spilling water phenomenon is definite.
The present invention has realized the zero release of paper waste, thereby has had following beneficial effect owing to adopted above-mentioned technical solution: the one, fundamentally solved the problem of paper waste serious environment pollution; The 2nd, because the recycle paper making water has been saved a large amount of precious water resource; The 3rd, the fixed capital input of waste water treatment reduces greatly, and the input treatment facility of the present invention only accounts for the 10-15% that traditional abatement equipment drops into; The 4th, saved the working cost of wastewater treatment; The 5th, improved paper pulp yield, reduced production cost.In a word, the present invention has fundamentally solved the pollution problem of paper waste and can save great lot of water resources, has very huge economy, society, ecological benefits.
Below the present invention is described in further detail:
Illustrate that at first common is the paper-making process of raw material with waste paper: raw material → pulping → desanding → concentrate → defibrination → screening the pulp → concentrate → pulping → blowing → desilting → steady slurry → Top wire former → squeezing → oven dry → press polish coil paper → finished product.As everyone knows, in this flow process, need a large amount of process waters and wash blanket towards the net water, it is estimated that present domestic paper industry ton paper water loss is between the 80-100 ton, these water are except that volatilization and paper product water content needs, and the overwhelming majority all will outwards be discharged as waste water, though at present through the precipitator method, the air supporting method, discharge again after the improvement such as biochemical process, but the water of discharging remains sewage, and quantity discharged is huge.
Essence of the present invention is exactly the recycle repeatedly after treatment of the waste water of papermaking, thereby realizes the zero release of paper waste.
Embodiment 1: each link in the paper-making process as concentrating, squeezed, and last net forming, washing waits the paper waste unification that gives off to reclaim, and handles by following technology.
Filter to reduce the suspended substance in the recycle-water through the screen filtration machine earlier; be discharged into again to regulate in the circulatory pool and carry out acid-base neutralisation; make the pH value of the waste water of backflow reach the required requirement of papermaking; with agitator the water of regulating in the circulatory pool is carried out cyclic motion simultaneously; make and do not filter clean suspended substance in the water and do not precipitate; without putrefaction when particularly shutting down, more will regularly be started agitator.After handling like this, the pH value and the ss suspended solid problem that influences papermaking are just solved, thereby the paper waste that makes recovery is re-used as the paper technology water and washes blanket and circulated towards the net water and recycle by recycle pump after treatment.
In paper-making process, replenish clear water in good time, replenish clear water in good time according to the water content in the raw material and oven dry steam output etc.Additional clear water must be located to be washed on the water jet standpipe that blanket uses.Can wash woollen blanket better with the clear water that replenishes like this.The clear water amount of replenishing should be identical with the amount that quilt in the production process is consumed, the general ton paper of producing, and additional clear water is not higher than one ton, guarantees that discharge of wastewater is zero.Herein for improving towards net, washing the blanket effect, can strengthen towards net, wash the water spray pressure of blanket water jet standpipe.
Certainly to the paper production line of several flow processs is arranged, for guaranteeing quality product, the water cycle of every flow process should be established one's own system, and is separate.
Fig. 1 is the cycling use of water process flow sheet of present embodiment.Fig. 2 is the synoptic diagram that the facility of paper making wastewater zero discharge technique of the present invention is regulated circulatory pool
Embodiment 2: the related special facilities of paper making wastewater zero discharge technique of the present invention follows for regulating Cisterna ambiens. As shown in Figure 2, it comprises pond body 1, is provided with agitator 2 and follows regulating circulatory pool inside The ring pump 3, the size of pond body 1 volume according to guarantee in paper-making process or stopped status under this pond body 1 lack of water or spilling water do not take place determines.
Embodiment 3: the water spray pressure that rushes net, washes the blanket sparge pipe among the embodiment 1 is done further Improve, all the other each operations etc. are all with embodiment 1.
Embodiment 4: will still send pulping back to through the pulping under the filtration of screen filtration machine among the embodiment 1 Recycle in the pond, to improve paper pulp yield, all the other each operations etc. are all with embodiment 1.
Claims (5)
1, a kind of paper making wastewater zero discharge technique is characterized in that this technology comprises:
A, the waste water that each link in the paper-making process is given off are all unified to reclaim,
B, by filter reducing the suspended substance in the recycle-water,
C, usefulness neutral method are controlled the pH value of recycle-water, reach the degree of reuse again,
D, the water of regulating in the circulatory pool is stirred with agitator,
E, will be through the water of above-mentioned filtration, neutralization and stir process again by recycle pump as the paper technology water with wash blanket and recycle with water cycle towards net,
Be evaporated and the used up water yield of papermaking in f, the additional paper-making process,
G, by regulating that circulatory pool regulates that the water yield in the paper-making process changes and retaining when shutting down.
2, a kind of special facilities of paper making wastewater zero discharge technique as claimed in claim 1---regulate circulatory pool; comprise pond body (1); it is characterized in that: be provided with agitator (2) and recycle pump (3) regulating circulatory pool inside, pond body bulk size according to guarantee in paper-making process or stopped status under lack of water does not take place or the spilling water phenomenon is determined.
3, paper making wastewater zero discharge technique according to claim 1 is characterized in that: increase towards net, wash the water spray pressure of blanket water jet standpipe.
4, paper making wastewater zero discharge technique according to claim 1 is characterized in that: the pulping under filtration is filtered is still sent back in the stock tank and is utilized.
5, according to claim 1 or 3 or 4 described paper making wastewater zero discharge techniques, it is characterized in that: additional clear water is located to be washed on the water jet standpipe that blanket uses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110966 CN1242343A (en) | 1998-07-20 | 1998-07-20 | Equipment and process specially for paper-making with no drainage of wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110966 CN1242343A (en) | 1998-07-20 | 1998-07-20 | Equipment and process specially for paper-making with no drainage of wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1242343A true CN1242343A (en) | 2000-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98110966 Pending CN1242343A (en) | 1998-07-20 | 1998-07-20 | Equipment and process specially for paper-making with no drainage of wastewater |
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| Country | Link |
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| CN (1) | CN1242343A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391873C (en) * | 2005-07-12 | 2008-06-04 | 武汉华麟科技有限公司 | Waste water treatment method and system of cold rolling emulsion |
| CN103058434A (en) * | 2013-01-28 | 2013-04-24 | 钟立福 | Zero-emission recycling device for water paper or raw cement board papermaking wastewater |
| CN103088689A (en) * | 2013-01-28 | 2013-05-08 | 钟立福 | Zero discharging and recycling technology for waste paper or raw stock board papermaking wastewater |
-
1998
- 1998-07-20 CN CN 98110966 patent/CN1242343A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391873C (en) * | 2005-07-12 | 2008-06-04 | 武汉华麟科技有限公司 | Waste water treatment method and system of cold rolling emulsion |
| CN103058434A (en) * | 2013-01-28 | 2013-04-24 | 钟立福 | Zero-emission recycling device for water paper or raw cement board papermaking wastewater |
| CN103088689A (en) * | 2013-01-28 | 2013-05-08 | 钟立福 | Zero discharging and recycling technology for waste paper or raw stock board papermaking wastewater |
| CN103058434B (en) * | 2013-01-28 | 2014-07-16 | 钟立福 | Zero-emission recycling device for water paper or raw cement board papermaking wastewater |
| CN103088689B (en) * | 2013-01-28 | 2014-10-08 | 钟立福 | Zero discharging and recycling technology for waste paper or raw stock board papermaking wastewater |
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