CN210764846U - Papermaking wastewater treatment system - Google Patents
Papermaking wastewater treatment system Download PDFInfo
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- CN210764846U CN210764846U CN201920995436.7U CN201920995436U CN210764846U CN 210764846 U CN210764846 U CN 210764846U CN 201920995436 U CN201920995436 U CN 201920995436U CN 210764846 U CN210764846 U CN 210764846U
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Abstract
The utility model discloses a papermaking effluent disposal system. The utility model relates to a papermaking wastewater treatment system, which comprises a wastewater tank, a fiber filter tank, a flocculation sedimentation tank, an organic matter degradation mechanism, a solid-liquid separation mechanism, a Fenton reaction tank and a shallow air flotation machine which are sequentially communicated through a water pipe; the system also comprises a sludge concentration mechanism, wherein the sludge concentration mechanism is used for collecting and treating sludge in the flocculation sedimentation tank, the solid-liquid separation mechanism and the shallow air flotation machine. The utility model discloses a papermaking effluent disposal system has designed a whole set of brand-new papermaking effluent disposal system with the integration of the wastewater disposal basin among the prior art, fibre filtering ponds, flocculation and sedimentation tank, organic matter degradation mechanism, solid-liquid separation mechanism, fenton reaction tank and shallow layer air supporting isostructure organic, and the serialization of whole system is better, and sewage treatment efficiency is high, and the quality of water after the processing is good, and the treatment cost is low.
Description
Technical Field
The utility model relates to a papermaking waste water treatment technical field especially relates to a papermaking waste water treatment system.
Background
The water consumption of the paper making industry in China is large, and the method is a main industry for polluting water environment. The problem of environmental pollution increasingly becomes a bottleneck restricting the development of paper making enterprises, so a novel water resource utilization mode is established, an effective wastewater treatment and recycling comprehensive treatment technology is explored, zero discharge of sewage is realized, and the method is very important for the development of the paper making enterprises in China. Zero discharge of papermaking wastewater refers to the integration of the water in the clear water and raw materials entering the system, which is equal to the water in the evaporated water, finished paper, the water in the screen sludge and the water in the sludge. Zero discharge is an important way for realizing clean production of pulping and papermaking enterprises, and is a development direction for wastewater treatment of papermaking enterprises in China.
The waste water produced by the papermaking process comprises: the main components of the black liquor generated by alkaline pulping and cooking are monosaccharide, lignin, cellulose, sodium hydroxide and the like, the middle section water pollutants are complex, contain lignin, cellulose, resinate and the like, are high in concentration and difficult to biodegrade, and the concentration of the white water of the paper machine is lower than that of the pollutants. Therefore, the papermaking wastewater has the characteristics of large water quantity, high concentration, deep chroma, more fiber-containing suspended matters and the like.
The common zero emission technology of the domestic papermaking industry is divided into two types, namely, short-flow circulation is adopted, and terminal treatment is not arranged; secondly, the process flow adopts high-efficiency purification aiming at suspended matters, a sewage secondary biochemical treatment system is arranged at a terminal, and the treated reclaimed water is recycled in the process flow. The former method is generally applicable to enterprises producing low-end products by using waste paper as a raw material, and the latter method is generally adopted by pulping and papermaking combined enterprises. The problems that the recycled sewage still has the problems of microorganism accumulation, salinity accumulation, suspended matter accumulation and the like even if secondary biochemical treatment is arranged, and the problems of equipment scaling, corrosion, paper product quality reduction and the like are caused. Therefore, the comprehensive treatment technology of the papermaking wastewater with cleaner water production and higher pollutant removal efficiency can be developed to realize sustainable zero emission in a real sense.
Disclosure of Invention
An object of the utility model is to provide a papermaking effluent disposal system that waste water treatment effect is good to the above-mentioned not enough of prior art.
The utility model relates to a papermaking wastewater treatment system, which comprises a wastewater tank, a fiber filter tank, a flocculation sedimentation tank, an organic matter degradation mechanism, a solid-liquid separation mechanism, a Fenton reaction tank and a shallow air flotation machine which are sequentially communicated through a water pipe; the fiber filtering tank is used for filtering fibers in the wastewater; the flocculation sedimentation tank is used for flocculating suspended matters in the sedimentation wastewater; the organic matter degradation mechanism is used for degrading organic matters in the wastewater; the solid-liquid separation mechanism is used for standing and precipitating the wastewater degraded by the organic matter degradation mechanism so as to realize solid-liquid separation; the shallow air flotation machine is used for further purifying the liquid separated by the solid-liquid separation mechanism; the system also comprises a sludge concentration mechanism, wherein the sludge concentration mechanism is used for collecting and treating sludge in the flocculation sedimentation tank, the solid-liquid separation mechanism and the shallow air flotation machine.
Preferably, the parallel interval is equipped with a plurality of filter screens in the fibre filtering ponds, and is a plurality of the filter screen is followed rivers direction interval sets up in the fibre filtering ponds for filter the fibre in the waste water.
Preferably, the filter screen forms an angle of 45 degrees with the water flow direction.
Preferably, the pore diameters of the filter screens arranged at intervals along the water flow direction in the fiber filter tank are sequentially reduced.
Preferably, the PAC and PAM are put into the flocculation sedimentation tank.
Preferably, the organic matter degradation mechanism comprises a hydrolysis acidification tank, an anaerobic reaction tower and an aeration tank which are sequentially communicated through pipelines, the hydrolysis acidification tank is communicated with the flocculation sedimentation tank through a pipeline, and the aeration tank is communicated with the solid-liquid separation mechanism through a pipeline.
Preferably, the organic matter degradation mechanism further comprises a biogas system, wherein the biogas system comprises a biogas boiler, and the biogas boiler is communicated with the anaerobic reaction tower through a gas pipe.
Preferably, the sludge concentration mechanism comprises a sludge tank for containing sludge and a membrane filter press for treating the sludge.
Preferably, still include with the workshop retrieval and utilization water pipe that the fenton reaction pond is linked together, workshop retrieval and utilization water pipe's one end with inside intercommunication in the fenton reaction pond, the other end and workshop water station intercommunication.
The utility model discloses a papermaking effluent disposal system has carried out the organic integration with wastewater disposal basin, fibre filtering ponds, flocculation and sedimentation basin, organic matter degradation mechanism, solid-liquid separation mechanism, fenton reaction tank and shallow layer air supporting machine isotructure among the prior art, has designed a whole set of brand-new papermaking effluent disposal system, and the serialization of whole system is better, and sewage treatment efficiency is high, and the quality of water after the processing is good, and the treatment cost is low.
Drawings
FIG. 1 is a schematic structural diagram of a papermaking wastewater treatment system of the present invention.
1. A pipeline; 2. a wastewater tank; 3. a fiber filter tank; 31. a filter screen; 4. a flocculation sedimentation tank; 5. an organic matter degradation mechanism; 51. a hydrolysis acidification pool; 52. an anaerobic reaction tower; 53. an aeration tank; 54. a biogas system; 541. a biogas boiler; 6. a solid-liquid separation mechanism; 7. a Fenton reaction tank; 71. recycling a water pipe in a workshop; 8. a shallow air flotation machine; 9. a sludge concentration mechanism; 91. a sludge tank; 92. and (4) a membrane filter press.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1, the papermaking wastewater treatment system of the present invention comprises a wastewater tank 2, a fiber filtering tank 3, a flocculation settling tank 4, an organic matter degradation mechanism 5, a solid-liquid separation mechanism 6, a fenton reaction tank 7 and a shallow air flotation machine 8 which are sequentially connected through a pipeline 1; the fiber filtering tank 3 is used for filtering fibers in the wastewater; the flocculation sedimentation tank 4 is used for flocculating suspended matters in the sedimentation wastewater; the organic matter degradation mechanism 5 is used for degrading organic matters in the wastewater; the solid-liquid separation mechanism 6 is used for standing and precipitating the wastewater degraded by the organic matter degradation mechanism 5 so as to realize solid-liquid separation; the shallow air flotation machine 8 is used for further purifying the liquid separated by the solid-liquid separation mechanism 6; the device also comprises a sludge concentration mechanism 9, wherein the sludge concentration mechanism 9 is used for collecting and treating the sludge in the flocculation sedimentation tank 4, the solid-liquid separation mechanism 6 and the shallow air flotation machine 8.
The utility model discloses a papermaking effluent disposal system has carried out the organic integration with wastewater disposal basin 2, fibre filtering ponds 3, flocculation and sedimentation tank 4, organic matter degradation mechanism 5, solid-liquid separation mechanism 6, fenton reaction tank 7 and shallow layer air supporting machine 8 isotructures among the prior art, has designed a whole set of brand-new papermaking effluent disposal system, and the serialization of whole system is better, and sewage treatment efficiency is high, and the quality of water after the processing is good, and the treatment cost is low.
A plurality of filter screens 31 can be arranged in the fiber filter tank 3 at intervals in parallel, and the filter screens 31 are arranged at intervals along the water flow direction in the fiber filter tank 3 and are used for filtering fibers in waste water. Most of the fiber is removed and recovered, and the load of subsequent treatment is reduced.
The filter screen 31 may be at an angle of 45 degrees to the direction of the water flow. Therefore, the area of the filter screen 31 is increased, the treatment effect is improved, and the filter screen 31 can be a nylon screen.
The apertures of a plurality of filter screens 31 arranged along the water flow direction in the fiber filter tank 3 at intervals can be reduced in sequence, and the filtering effect is enhanced.
PAC and PAM are put in the flocculation sedimentation tank 4. PAC and PAM are added, electric charges are introduced into the suspended matters, the suspended matters are agglomerated and precipitated under the action of adsorption and bridging, the settling rate and effect of the suspended matters in the wastewater are accelerated, so that the inorganic precipitates and other easily-settled suspended matters in the wastewater in the flocculation sedimentation tank 4 are settled and removed under the action of gravity, and the removal load and cost of subsequent equipment are reduced.
The organic matter degradation mechanism 5 can comprise a hydrolysis acidification tank 51, an anaerobic reaction tower 52 and an aeration tank 53 which are sequentially communicated through pipelines, wherein the hydrolysis acidification tank 51 is communicated with the flocculation sedimentation tank 4 through a pipeline, and the aeration tank 53 is communicated with the solid-liquid separation mechanism 6 through a pipeline.
The hydrolysis acidification pool 51 collects the effluent of the flocculation sedimentation pool 4, and degrades macromolecular substances into micromolecules through the action of hydrolysis bacteria and acidification bacteria, so that the biochemical substances are degraded into biochemical substances. The hydraulic retention time of the hydrolysis acidification tank 51 meets the acidification requirement of the wastewater, is generally controlled within 6 hours, and can control the liquid level according to the incoming water quantity, thereby ensuring that the hydrolysis acidification degree is qualified. The degree of hydrolytic acidification was calibrated by measuring Volatile Fatty Acids (VFA).
Methanogenic bacteria can be put into the anaerobic reaction tower 52, the methanogenic bacteria mostly belong to mesophilic bacteria, and the anaerobic reaction tower 52 is controlled at 30-38 ℃, and the growth of the methanogenic bacteria is not facilitated when the temperature is too high or too low.
The aeration tank 53 is used for introducing air into the wastewater and providing suitable nutrient elements, and the aerobic microorganisms growing in suspension utilize oxygen metabolism in water to adsorb pollutants in the water for life activities as substrates, so that the purpose of degrading organic matters in the water is achieved.
The organic matter degradation mechanism 5 further comprises a biogas system 54, the biogas system 54 comprises a biogas boiler 541, and the biogas boiler 541 is communicated with the anaerobic reaction tower 52 through a gas pipe. The anaerobic reaction tower 52 generates a certain amount of biogas when removing COD, the biogas is removed by burning the biogas through a steam boiler, and the generated steam is used for the heat preservation of the anaerobic tower or for workshop production.
The sludge thickening mechanism 9 may include a sludge tank 91 for containing sludge and a membrane filter press 92 for treating sludge.
The papermaking wastewater treatment system further comprises a workshop recycling water pipe 71 communicated with the Fenton reaction tank 7, one end of the workshop recycling water pipe 71 is communicated with the interior of the Fenton reaction tank 7, and the other end of the workshop recycling water pipe is communicated with a workshop water using station. The solid-liquid separation mechanism 6 carries out solid-liquid separation on the effluent of the aeration tank 53, the precipitated sludge is conveyed to the aeration tank 53 through the sludge reflux pump, the amount of activated sludge in the aeration tank 53 is supplemented, the residual sludge is discharged to the sludge concentration tank, and the effluent enters the Fenton unit.
The main functions of the shallow air flotation machine 8 are as follows: after a flocculating agent is added into the water, the suspended matters and colloid substances form larger suspended matters which are combined with micro bubbles released by high-pressure dissolved air water, the total density of the suspended matters is less than that of the water, the suspended matters float upwards, and then the suspended matters are removed by a scraper to achieve solid-liquid separation.
Dissolved air pressure of the shallow air flotation machine 8: the outlet pressure of the dissolved air tank is not less than 0.5 MPa: greater than 0.4 MPa;
the rotation speed of the air floatation travelling mechanism of the shallow air floatation machine 8 is as follows: the speed of scraping slag is adjusted according to the thickness of the scum on the upper layer in the pool, and the scraping depth is required to slightly exceed the thickness of the scum. The slower the walking speed, the longer the dross residence time, and the thicker the dross build up.
The air flotation slag scraping rotating speed of the shallow air flotation machine 8 is as follows: and adjusting the rotating speed until the scum is just scraped off according to the walking speed.
Air flotation dosing of the shallow air flotation machine 8: coagulant PAC: preparing the drug with the concentration of 10-15% and the addition amount of 200-500 mg/L; flocculating agent PAM: preparing 0.8-1.0 per mill of concentration and 3-5 mg/L of dosing amount;
the above is not relevant and is applicable to the prior art.
Although certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention, which is to be construed as broadly as the present invention will suggest themselves to those skilled in the art to which the invention pertains and which is susceptible to various modifications or additions and similar arrangements to the specific embodiments described herein without departing from the scope of the invention as defined in the appended claims. It should be understood by those skilled in the art that any modifications, equivalent substitutions, improvements and the like made to the above embodiments according to the technical spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. A papermaking wastewater treatment system is characterized in that: comprises a wastewater tank (2), a fiber filter tank (3), a flocculation sedimentation tank (4), an organic matter degradation mechanism (5), a solid-liquid separation mechanism (6), a Fenton reaction tank (7) and a shallow air flotation machine (8) which are sequentially communicated through a pipeline (1); the fiber filtering tank (3) is used for filtering fibers in the wastewater; the flocculation sedimentation tank (4) is used for flocculating suspended matters in the sedimentation wastewater; the organic matter degradation mechanism (5) is used for degrading organic matters in the wastewater; the solid-liquid separation mechanism (6) is used for standing and precipitating the wastewater degraded by the organic matter degradation mechanism (5) so as to realize solid-liquid separation; the shallow air flotation machine (8) is used for further purifying the liquid separated by the solid-liquid separation mechanism (6); the device is characterized by further comprising a sludge concentration mechanism (9), wherein the sludge concentration mechanism (9) is used for collecting and treating sludge in the flocculation sedimentation tank (4), the solid-liquid separation mechanism (6) and the shallow air flotation machine (8).
2. The papermaking wastewater treatment system according to claim 1, wherein: the fiber filtering pond is characterized in that a plurality of filter screens (31) are arranged in the fiber filtering pond (3) at intervals in parallel, and the filter screens (31) are arranged along the direction of water flow in the fiber filtering pond (3) at intervals and are used for filtering fibers in waste water.
3. The papermaking wastewater treatment system according to claim 2, wherein: the filter screen (31) and the included angle of the water flow direction are 45 degrees.
4. The papermaking wastewater treatment system according to claim 2, wherein: the pore diameters of the filter screens (31) which are arranged at intervals along the water flow direction in the fiber filter tank (3) are reduced in sequence.
5. The papermaking wastewater treatment system according to claim 1, wherein: PAC and PAM are put into the flocculation sedimentation tank (4).
6. The papermaking wastewater treatment system according to any one of claims 1 to 5, wherein: the organic matter degradation mechanism (5) comprises a hydrolysis acidification tank (51), an anaerobic reaction tower (52) and an aeration tank (53) which are sequentially communicated through a pipeline (1), wherein the hydrolysis acidification tank (51) is communicated with the flocculation sedimentation tank (4) through a pipeline, and the aeration tank (53) is communicated with the solid-liquid separation mechanism (6) through a pipeline (1).
7. The papermaking wastewater treatment system according to claim 6, wherein: the organic matter degradation mechanism (5) further comprises a biogas system (54), the biogas system (54) comprises a biogas boiler (541), and the biogas boiler (541) is communicated with the anaerobic reaction tower (52) through a gas pipe.
8. The papermaking wastewater treatment system according to any one of claims 1 to 5, wherein: the sludge concentration mechanism (9) comprises a sludge tank (91) for containing sludge and a membrane filter press (92) for treating the sludge.
9. The papermaking wastewater treatment system according to any one of claims 1 to 5, wherein: still include with workshop retrieval and utilization water pipe (71) that fenton reaction tank (7) are linked together, the one end of workshop retrieval and utilization water pipe (71) with inside the being linked together of fenton reaction tank (7), the other end and workshop water station intercommunication.
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| CN201920995436.7U CN210764846U (en) | 2019-06-28 | 2019-06-28 | Papermaking wastewater treatment system |
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| CN201920995436.7U CN210764846U (en) | 2019-06-28 | 2019-06-28 | Papermaking wastewater treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255824A (en) * | 2019-06-28 | 2019-09-20 | 湖北长江汇丰纸业有限公司 | A kind of pulping wastewater treatment method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255824A (en) * | 2019-06-28 | 2019-09-20 | 湖北长江汇丰纸业有限公司 | A kind of pulping wastewater treatment method and system |
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