CN105780563A - Zero-emission technology for adopting oxidation heat twisting combination method for manufacturing straw pulp - Google Patents
Zero-emission technology for adopting oxidation heat twisting combination method for manufacturing straw pulp Download PDFInfo
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- CN105780563A CN105780563A CN201610115475.4A CN201610115475A CN105780563A CN 105780563 A CN105780563 A CN 105780563A CN 201610115475 A CN201610115475 A CN 201610115475A CN 105780563 A CN105780563 A CN 105780563A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention discloses a technology adopting an oxidation heat twisting combination method for manufacturing straw mechanical pulp. The technology comprises the steps that straw is cut off and subjected to ozone treatment; a material subjected to ozone treatment is concentrated; the concentrated material is fed into a compound straw separator to be subjected to first-stage heat twisting; the material subjected to first-stage heat twisting is conveyed into a continuous steamer to be subjected to continuous steaming; the material subjected to continuous steaming is fed into a single straw separator to be subjected to second-stage heat twisting; the material subjected to second-stage heat twisting is conveyed into a latency device to be subjected to ozone oxidation; the material treated through the latency device is conveyed into a disc type separator to be subjected to wire separation and brooming; the material subjected to wire separation and brooming is screened in a low-concentration mode to obtain the straw mechanical pulp. According to the technology for adopting the oxidation heat twisting combination method for manufacturing the straw mechanical pulp, cellulose and hemicellulose are preserved to the greatest extent, and the pulp obtaining rate reaches 80% or above. The technology for manufacturing the straw mechanical pulp further comprises a technological waste water treatment technology, technological water is purified and recycled, and zero emission is achieved.
Description
Technical field
The invention belongs to straw processing technique field, the heat of oxidation relating to a kind of zero-emission rubs combination legal system straw pulp technique with the hands.
Background technology
Replace trees papermaking with straw, not only save the forest reserves, especially the comprehensive utilization to agricultural crop straw.
Tradition utilizes straw pulping process mainly to include chemical pulping process, mechanical pulping process etc..
Chemical pulping process needs to use heavy dose of chemicals to make lignin macromolecule crack and dissolution, is typically in adopting under highly basic or strong acid condition the rotary spherical digester device batch production chemical pulp of High Temperature High Pressure.Although the chemical pulp that this method produces can produce writing paper and paper for daily use, but pulp yield is low, ton straw pulp yield only about 30%, and power consumption is big, and pollutional load is big, and water intractability is greatly and costly.
Mechanical pulping process is to adopt machinery brute force to make raw material be broken into fiber.Lignin in mechanical feedback dissolution raw material hardly, therefore pulping yield is high, but single physics pulping process power consumption is big, the damage of the frictional tear effect being subject to due to fiber in production process is bigger, the physical strength of mechanical pulp is lower than other slurries kind, slurry remains a large amount of lignin, thus is relatively difficult to bleaching.
The producer utilizing the building materials such as straw processing fibre board all utilizes pulverizer by crushed stalk, through adding glue stirring, and hot repressing molding.This method has the drawback that cloth is uneven, and glue consumption is big, and cost is high.
The producer of current domestic converting pulp moulding article all utilizes waste paper processing industry paper using and egg tropsch products, and its shortcoming is, contains heavy metal and ink, the dyestuffs such as lead due to waste paper, causes being greatly limited in range of application.
Accordingly, it would be desirable to develop the straw pulping process of a kind of pollution-free, high yield pulp1.
Summary of the invention
Technical problem
The purpose of the present invention and technical problem to be solved are to provide a kind of new combined method and prepare the technique of high yield pulp1 straw mechanical pulp, and whole production process can reach zero-emission, not only save data, and energy-saving and emission-reduction, simple to operate.Utilize old stalk resource of raw year every year, provide inexhaustible high-quality raw material for building materials, wrapping paper, industrial or agricultural and food moulded shape bodies.
Technical scheme
To achieve these goals, the invention provides the heat of oxidation of a kind of zero-emission and rub combination legal system straw mechanical pulp technique with the hands.
Specifically, the invention provides a kind of heat of oxidation and rub combination legal system straw mechanical pulp technique with the hands, including:
1, by straw cutting and carry out ozonization；
2, the material after ozonization is concentrated；
3, the material after concentration is delivered to compound straw seperator and carry out first paragraph heat stranding；
4, the material after first paragraph heat is rubbed with the hands is transported in even steam device and carries out even steam；
5, single entry straw seperator of being made a gift to someone by the material after even steam carries out second segment heat stranding；
6, the material after second segment heat is rubbed with the hands is transported in the latent device that disappears and carries out ozone oxidation；
7, the material after the latent device that disappears processes is sent into disc seperator and carry out wire-dividing broom purification；
8, low for the material after wire-dividing broom purification dense screening is obtained straw mechanical pulp.
Further, the described heat of oxidation rubs combination legal system straw mechanical pulp technique with the hands, including:
1, in pulper, ozone solution is pumped into, then by straw cutting dedusting and put in pulper, stirring oxidation 20-30 minute；
2, joining in dewaterer by the material after ozonization, being concentrated into mass dryness fraction is 20-30%；
3, the material conveying worm after concentration is delivered to compound straw seperator and carry out first paragraph heat stranding, with steam by the heating material in conveying worm to 70-90 DEG C；
4, the material after first paragraph heat is rubbed with the hands is transported in even steam device, heats to 90-100 DEG C with steam, even steam 50-70 minute；
5, single entry straw seperator of being made a gift to someone by the material after even steam carries out second segment heat stranding；
6, at the addition ozone solution in latent device that disappears, the material after second segment heat is rubbed with the hands is transported to and disappears in latent device, aoxidize 50-70 minute；
7, the material after the latent device that disappears processes is sent into disc seperator and carry out wire-dividing broom purification；
8, low for the material after wire-dividing broom purification dense screening is obtained straw mechanical pulp.
Wherein, in step 1, the concentration of ozone is 50-70g/m3, it is preferable that 55-65g/m3；Treatment temperature is 15-25 DEG C.
In step 3, material steam is first heated rapidly to 70-90 DEG C before entering conveying worm by material after concentration.
In step 6, the concentration of ozone is 50-70g/m3, treatment temperature is 15-25 DEG C.
In above-mentioned steps, rubbed with the hands by the first paragraph heat of oxidation and change the framing structure of lignin and cellulosic degree of crystallinity, make it be changed into unformed shape by crystalline state, reduce cellulosic degree of polymerization, the lignin linked with wax coat and cellulose and hemicellulose complex are discongested and separated filamentation.
Second segment heat is rubbed with the hands and separated is utilize the tiny cell wall that vapours penetrates straw that the hemiacetal linkage in straw is ruptured, thus promoting the cracking of ehter bond, it is achieved that the further separation of cellulose and hemicellulose, also eliminates part lignin.
Disappearing in latent device, make delignification less than 35%, soften further and swollen cellulose and hemicellulose simultaneously；Being completed wire-dividing broom purification by disc seperator again, material goes out qualified straw mechanical pulp then through too low dense screening and separating, becomes and produces wrapping paper, building materials, the primary raw material of moulding article and dispensing.
According to embodiments of the invention, described straw can be the straw etc. of Semen Tritici aestivi, Fructus Hordei Vulgaris, Semen Maydis, Oryza sativa L., Sorghum vulgare Pers. and phragmites communis.
Further, the heat of oxidation of the zero-emission of the present invention rubs combination legal system straw mechanical pulp technique with the hands, also includes Waste water treatment technology, described waste water treatment process can realize whole production process zero-emission, not only environmental friendliness, and save resource, there is huge economic benefit and social benefit.
Utilizing the processes straw mechanical pulp that oxidation mechanical thermal is rubbed with the hands, wastewater source mainly has two parts, and a part is the hc effluent rubbed with the hands through heat and concentrated by pressure filter after oxidation, and another part is the middle section water through low dense wire-dividing broom purification flotation.Waste water mainly contains CODcr, BODs, SS and a small amount of lignin and saccharide.The present invention adopts five sections of combined methods to process waster water process according to waste water quality, and the fresh water (FW) after process reaches reuse standard, it is achieved zero-emission.
Prepare technique waste water produced by straw mechanical pulp and carry out following process:
1, materializing strategy
By technique waste water successively through fine fack interception, Microfilter filtration, ashes adsorption bleaching, ANTHRACITE FILTER MEDIA filtration treatment；
2, biochemical treatment
Waste water after materializing strategy, passes sequentially through following process device and processes: hydrolysis acidification pool, anaerobic reactor, bioselection pond, oxidation ditch, second pond；
3, flocculation treatment
With flocculant, the waste water after biochemical treatment is processed；
4, oxidation processes
Waste water ozone through flocculation treatment is further processed；
5, depth-type filtration processes
Oxidation-treated waste water is processed through quartz sand, fibrous nodules and activated carbon filtration successively.
Further, described five sections of combined methods process waster water process includes:
1, materializing strategy
(1) waste water reclaims fiber fines through fine fack；
(2) through Microfilter filtering suspended particles thing；
(3) ashes mix with waste water and carry out adsorption bleaching；
(4) filter through ANTHRACITE FILTER MEDIA；
2, biological treatment
Waste water, after materializing strategy, passes sequentially through following process device and processes:
(1) hydrolysis acidification pool, acidificatoin time 4-6 hour, resolves into the Organic substance of easily degraded by hard-degraded substance；
(2) anaerobic reactor, water temperature 30-37 DEG C, pH value 6.5-7.5, waste water stops more than 15 hours in anaerobic reactor；
(3) bioselection pond, creates the ecological environment being conducive to development flocculability antibacterial, effectively suppresses hyphomycetic amount reproduction, overcomes sludge bulking, improves the stability that biosystem runs；
(4) oxidation ditch, adopts efficient Gas feeding jet-flow aeration technique, dissolved oxygen 1-2mg/L, and water temperature 15-30 DEG C, nutrient substance adds N and P by COD:N:P=800:5:1, and pH value is 6.5-7.5, and aerobic time is 7-9 hour；
(5) second pond, realizes mud-water separation at second pond；
3, coagulating treatment
With flocculant, the waste water after biological treatment being processed, flocculant concentration is 8-10mg/L, pH is 6.5-7.5；
4, oxidation processes
With ozone, waste water being further processed, ozone adds concentration 0.5-0.7mg/L, and pH value is at 6.5-7.5, and oxidization time is 20-30 minute；
5, depth-type filtration processes
Oxidation-treated waste water is adopted three layer filtration, and a metafiltration material is quartz sand, and two metafiltration material are fibrous nodules, and three-layer filter is the activated carbon of 20-30 angstrom of micropore.
Below five sections of combined method waste water treatment process are described in detail.
Materializing strategy process
The main pre-treating high concentration waste water of materializing strategy and middle section water.First hc effluent reclaims fiber fines through fine fack；Size suspended particulate substance is filtered then through ultra micro filter；Then with ashes and waste water mix and blend, carry out adsorbing and decolouring；Then hydrolysis acidification pool is pumped into after filtering then through anthracite；Wherein the ratio of ashes and waste water is 1:4-6, enters sedimentation tank, be provided with conveying worm bottom sedimentation tank after ashes adsorb, and is transported out by the ashes after precipitation, is used for making non-burning brick through filter pressing.
Middle section water reclaims chopped fiber through fine fack, is filtered then through ultra micro filter, pumps into hydrolysis acidification pool.
Biological treatment process
Hydrolysis acidification pool provides the acidificatoin time of 4-6 hour for waste water, stablizes waste water organic loading；Create oxygen environment of holding concurrently to be hydrolyzed acidifying, hard-degraded substance is resolved into the Organic substance of easily degraded.
Waste water pumps into anaerobic reactor (UASB reactor) after hydrolysis acidification and carries out anaerobic reaction.Waste water is the time of staying more than 15 hours in reactor, pH value 6.5-7.5, water temperature 30-37 DEG C.Making the Organic substance (such as lignin, acylate, carbohydrate, waxiness etc.) in waste water through steps such as the hydrolysed ferment of anaerobism, dealing with alcohol and methanations by anaerobic reaction, further metabolism is other materials such as micromolecular methane, reaches degraded.
Bioselection pond forms dynamic (dynamical) rule according to activated sludge populations and arranges.In bioselection pond, the activated sludge of water inlet with second pond backflow is mutually mixed and contacts, create suitable growth of microorganism condition and select flocculability antibacterial, effectively suppress hyphomycetic amount reproduction, overcome sludge bulking, improve the stability that biosystem runs.
Oxidation ditch form is be thoroughly mixed the ring aeration tank of formula, adopts efficient Gas feeding jet-flow aeration technique.Process conditions are that dissolved oxygen is about 1-2mg/L, and water temperature 15-30 DEG C, nutrient substance adds N and P by COD:N:P=800:5:1, and pH value is between 6.5-7.5, and aerobic time is 7-9 hours.
Waste water after oxidized ditch Aerobic Process for Treatment enters second pond.Second pond is designed as spoke stream precipitating type, carries out mud-water separation at this, and partial sludge is back to bioselection pond above, and excess sludge pumps into sludge treating system, and clear liquid flows into coagulative precipitation tank.
During Coagulation Process
For removing float and the CODcr of residual in waste water further, ensure recycle-water quality, adopt coagulant sedimentation that waste water is processed.Adopting aluminium polychlorid and polyacrylamide as flocculant, concentration is 8-10mg/L, and every 1000 cubes of water 5-10Kg, pH are between 6.5-7.5, and the sedimentation time was no less than 6 hours.
Oxidation processes
The supernatant of coagulating sedimentation pumps into O3Oxidation pond, the residual mineral thing in further oxidized waste water, and deodorizing waste water is eliminated the unusual smell and sterilization.The ozone that adds adopts fluid jet, it is simply that accelerates flow velocity through equipment reducing when using water movable in the duct and constitutes negative inspiratory pressure, is mixed into oxidation pond by ozone and water in pipeline.Ozone adds concentration 0.5-0.7mg/L, and pH value is at 6.5-7.5, and oxidization time is 20-30 minute.
Depth-type filtration processing procedure
For guaranteeing effluent quality, stably reaching the standard of recycle-water, adopt three layer filtration, a metafiltration material is quartz sand, and two metafiltration material are fibrous nodules, and three-layer filter is the activated carbon of 20-30 angstrom of micropore.Utilize multilamellar filtrate principle that SS, CODcr, BODs colourity etc. remaining in waste water is caught, adsorb, filtration treatment, after making process, effluent quality reaches reuse standard, it is ensured that the stable operation of workshop.
Technique waste water reclaims through grid maker chopped fiber, Microfilter filters, ashes adsorption bleaching eliminates the unusual smell, the one-level materializing strategy of ANTHRACITE FILTER MEDIA；The secondary biochemical treatment of anaerobic-aerobic precipitation；Three grades of chemical treatments of flocculation；The level Four of ozone oxidation processes；After, the Pyatyi through quartz sand, fibrous nodules and activated carbon filtration processes, and reaches recycling standard, it is achieved zero-emission.
Fresh water (FW) after being processed by materialization, biochemistry, chemistry, ozone oxidation, depth-type filtration Pyatyi combined method novel process reaches reuse standard, ashes processing after absorption is non-burning brick, ANTHRACITE FILTER MEDIA after filtration is made a gift to someone boiler combustion, biogas produced by anaerobism is used for generating electricity, anaerobic-aerobic mud is used for processing bio-fertilizer, reaches zero-emission.
The invention still further relates to a kind of compound stalk fibre seperator, including base, frame, feed arrangement, reducing mechanism, drawing mechanism, actuating device, wherein frame is installed on base, feed arrangement includes charging aperture and feed auger, reducing mechanism includes break bar, actuating device includes rotating shaft, drawing mechanism includes discharging spiral, rotating shaft is installed in frame, same rotating shaft is provided with feed auger and break bar, it is characterised in that: feed arrangement, reducing mechanism, drawing mechanism, actuating device are divided into two or more working area.
Further, frame includes the first support, the second support, the 3rd support, and the second support is between first and in the middle of the 3rd support.
Further, actuating device includes upper and lower two countershafts, and wherein lower rotary shaft is installed between the first support and the 3rd support, and upper rotating shaft is installed between the second support and the 3rd support.
Further, by idler gear transmission between upper and lower two countershafts.
Further, idler gear is positioned at the 3rd support.
Further, feed arrangement includes feeding warehouse, upper and lower two pairs of feed auger, and wherein feeding warehouse is divided into upper and lower two charging apertures by the second support, connects with two working areas of feed arrangement respectively, and upper feeding spiral is installed on rotating shaft, and lower feed auger is installed on lower rotary shaft.
Further, reducing mechanism includes crushing bin, upper and lower two pairs of break bars, wherein goes up break bar and is installed on rotating shaft, and lower break bar is installed on lower rotary shaft, and the blade of every pair of break bar is interlaced to be interlocked.
Further, drawing mechanism includes upper and lower two discharging spirals, and top discharge spiral connects with the upper working area of reducing mechanism, and bottom discharge spiral connects with the lower working area of reducing mechanism.
Further, the compound stalk fibre seperator of the present invention also includes vertical discharging spiral, and upper and lower two discharging spirals all connect with vertical discharging spiral.
Further, the compound stalk fibre seperator of the present invention also includes distributing means for power supply and motor, and motor provides power for rotating shaft, and power is distributed to two lower rotary shafts by distributing means for power supply simultaneously.
Described compound stalk fibre separator structure is simple, and work efficiency is high, and straw enters inside compound stalk fibre seperator through upper and lower charging aperture, forms fiber fines shape, discharge through discharging spiral under break bar extrudes repeatedly, for becoming paper pulp to provide mode the most easily.
Beneficial effect
The present invention solves a difficult problem for processing equipment straw pulp innovatively, and its innovative point and effect are as follows:
1, the heat of oxidation rubs combination legal system straw mechanical pulp a new combined process with the hands, due to the cellulosic a part of crystal region marshalling of straw itself, except having powerful hydrogen bond link inside lignin, stable lignin-carbohydrate complexes is formed with hemicellulose, therefore single method goes to process straw a lot of drawback, physical method power consumption as single is big, and single chemical method can form secondary pollution.The invention solves above-mentioned drawback, have employed the heat of oxidation and rub combination legal system straw mechanical pulp with the hands, both reduced power consumption, and be formed without again secondary pollution, and remained cellulose and hemicellulose to greatest extent, pulp yield reaches more than 80%.
2, materialization, biochemistry, chemistry, ozone oxidation, depth-type filtration Pyatyi combined method novel process process waste water and reach zero-emission.Owing to adopting the heat of oxidation to rub combination legal system straw mechanical pulp novel process with the hands, pulp yield is high, and water pollutional load is relatively small.After five sections of process, fresh water (FW) has reached to be back to the standard that workshop recycles, and ashes absorption post-treatment is non-burning brick, and ANTHRACITE FILTER MEDIA is used for boiler oil after filtering, and biogas produced by anaerobism is used for generating electricity, the use of watering place science and engineering section.Anaerobic-aerobic mud is used for processing bio-fertilizer after treatment.Therefore whole production process had both reached zero-emission, saved again the energy, also created economic worth.
3, present invention employs normal temperature and pressure technique, straw only reaches size degradation degree, remains cellulose and hemicellulose so to greatest extent, and its advantage is:
(1) straw mechanical pulp of this high yield pulp1, just the best high-quality core material of the kraft liner cardboard paper of low grammes per square metre, high intensity and the high-quality dispensing of high-strength corrugated paper are become, because straw pulp contains lignin, so paper sheet stiffness is big, opacity is high, expansion and contraction is less, again because hemicellulose level is high, be conducive to the combination of fiber, the fracture length of paper, bursting strength and folding strength is strong.Owing to straw mechanical pulp lignin and hemicellulose level are higher than waste paper, so the high-strength corrugated paper prepared using straw pulp as main proportioning raw material and kraft liner cardboard paper etc. are better than the wrapping paper being raw material with waste paper in ring crush intensity, fracture length etc..
(2) due to the wet feed preparation of straw mechanical pulp process, on processing fibreboard product, not only cloth is uniform, and lignin and the wax coat after swollen and softening still sticks on the fiber fines after rubbing, without applying glue make hot-forming after fibre board density high intensity is good and smooth surface, significantly reduce product cost simultaneously.
(3) with straw mechanical pulp this natural material converting pulp moulding article not only cost is low, deflection good, and it is widely used in industrial packaging, pot for growing seedlings, agricultural products packaging, marine product packaging and packaging for foodstuff etc..
4, owing to pulp yield is high, straw processing cost is low, becomes the primary raw material of processing and packing paper, makes the cost of wrapping paper reduce about 20%-30% than the like product of equal quality, and product has the extremely strong market competitiveness.
5, owing to adopting O in the straw course of processing3Auxiliary agent, O in straw pulping process3Not only acting as the effect aoxidizing straw and the effect also functioning to exterminating bacterium, therefore this straw mechanical pulp can produce wrapping paper and the goods of food stage, has saved timber, has considerably increased added value of product.
6, the invention of this technical matters makes agricultural stalk not only obtain comprehensive utilization but also the very big huge raw materials market demand that must meet building materials, wrapping paper, moulding article.
Accompanying drawing explanation
Fig. 1 is the front view of the compound stalk fibre seperator of the present invention.
Fig. 2 is the left view of the compound stalk fibre seperator of the present invention.
Detailed description of the invention
Below in conjunction with embodiment with the hands the heat of oxidation of zero-emission of the present invention is rubbed combination legal system straw mechanical pulp technique to elaborate.
Embodiment
(1) by ozone solution pump people's hydrabrusher, the concentration of ozone is 60g/m3；Then being conveyed in hydrabrusher by the straw having been turned off dedusting and be stirred oxidation, process 25 minutes, treatment temperature is about 20 DEG C.By above-mentioned treated by ozone after product pump people's dewaterer, be concentrated into the mass dryness fraction of 25%.Being brought rapidly up material steam to 90 DEG C, then carry out first paragraph heat stranding with conveying worm compound straw seperator of being made a gift to someone by material, material is heated to 80 DEG C with steam in conveying worm simultaneously.
(2) material after first paragraph heat is rubbed with the hands is conveyed in even steam device, heats to 95 DEG C with steam, even steam 1 hour.Then single entry of making a gift to someone straw seperator carries out second segment heat stranding.
(3) pumping into ozone solution in latent device disappearing, the concentration of ozone is 60g/m3；Disappear in latent device by being conveyed into from single entry stalk fibre seperator material out, aoxidize 1 hour, make delignification less than 35%, simultaneously softening and swollen cellulose and hemicellulose further；Again the material after the latent device that disappears processes is sent into disc seperator, complete wire-dividing broom purification；Material after wire-dividing broom purification is gone out qualified straw mechanical pulp through too low dense screening and separating, becomes and produce wrapping paper, building materials, the primary raw material of moulding article and dispensing.
(4) 5 grades of combined methods are adopted to process technique waste water
Utilizing the processes straw mechanical pulp that oxidation mechanical thermal is rubbed with the hands, wastewater source mainly has two parts, and a part is the hc effluent rubbed with the hands through heat and concentrated by pressure filter after oxidation, and another part is the middle section water through low dense wire-dividing broom purification flotation.Producing hc effluent about 10 tons, middle section water about 20 tons in slurry production process per ton, totally 30 tons of waste water need to process.Waste water mainly contains CODcr, BODs, SS and a small amount of lignin and saccharide.
(a) materializing strategy process
First hc effluent reclaims fiber fines through fine fack；Size suspended particulate substance is filtered then through ultra micro filter；Then with ashes and waste water mix and blend, carry out adsorbing and decolouring；Then hydrolysis acidification pool is pumped into after filtering then through anthracite；Wherein the ratio of ashes and waste water is 1:5, enters sedimentation tank, be provided with conveying worm bottom sedimentation tank after ashes adsorb, and is transported out by the ashes after precipitation, is used for making non-burning brick through filter pressing.
Middle section water reclaims chopped fiber through fine fack, is filtered then through ultra micro filter, pumps into hydrolysis acidification pool.
This processes step, and CODcr, BODs clearance reaches 60-70%；SS float≤80-90mg/L；PH value is 6.5-7.5.
(b) biological treatment process
Hydrolysis acidification pool provides the acidificatoin time of 5 hours for waste water, stablizes waste water organic loading；Create oxygen environment of holding concurrently to be hydrolyzed acidifying, under a large amount of hydrolytic bacterias, acidifying bacterium effect, hard-degraded substance is resolved into the Organic substance of easily degraded.
Waste water pumps into anaerobic reactor (UASB reactor) after hydrolysis acidification and carries out anaerobic reaction.Waste water is the time of staying more than 15 hours in reactor, pH value 6.5-7.5, water temperature 30-37 DEG C, sewage load 3500-4000mg/L, SS≤90mg/L.Make the Organic substance in waste water (such as lignin by anaerobic reaction, acylate, carbohydrate, waxiness etc.) through steps such as the hydrolysed ferment of anaerobism, dealing with alcohol and methanations, further metabolism is other materials such as micromolecular methane, reaches degraded, the clearance of CODcr, BODs is 55-65% and 85-89%, biogas output is 0.92-7.0mg/L waste water, and methane content of bilogas is 78%-80%, and chroma removal rate is about 70%.
Bioselection pond forms dynamic (dynamical) rule according to activated sludge populations and arranges.In bioselection pond, the activated sludge with second pond backflow of intaking is mutually mixed and contacts, and creates suitable growth of microorganism condition and selects flocculability antibacterial.Bioselection pond can also suppress hyphomycetic amount reproduction effectively, overcomes sludge bulking, improves the stability that biosystem runs.
Oxidation ditch form is be thoroughly mixed the ring aeration tank of formula, adopts efficient Gas feeding jet-flow aeration technique.Process conditions are that dissolved oxygen is about 1-2mg/L, and water temperature 15-30 DEG C, nutrient substance adds N and P by COD:N:P=800:5:1, and pH value is between 6.5-7.5, and aerobic time is 8 hours.In oxidation ditch, by means of the organic effect of adsorption-decomposition function of aerobic microbiological, to make CODcr clearance be 70-80%, BODs clearance is 80-90%, and chroma removal rate is 75%, and SS clearance is 80%.
Waste water after oxidized ditch Aerobic Process for Treatment enters second pond.Second pond is designed as spoke stream precipitating type, carries out mud-water separation at this, and partial sludge is back to bioselection pond above, and excess sludge pumps into sludge treating system, and clear liquid flows into coagulative precipitation tank.
(c) During Coagulation Process
For removing float and the CODcr of residual in waste water further, ensure recycle-water quality, adopt coagulant sedimentation that waste water is processed.Adopting aluminium polychlorid and poly internal olefins amide as flocculant, concentration is 8-10mg/L, and every 1000 cubes of water 5-10Kg, pH are between 6.5-7.5, and the sedimentation time was no less than 6 hours.CODcr clearance 70-80%, percent of decolourization is more than 90%.
(d) oxidation processes
The supernatant of coagulating sedimentation pumps into O3Oxidation pond, the residual mineral thing in further oxidized waste water, and deodorizing waste water is eliminated the unusual smell and sterilization.The ozone that adds adopts fluid jet, it is simply that accelerates flow velocity through equipment reducing when using water movable in the duct and constitutes negative inspiratory pressure, is mixed into oxidation pond by ozone and water in pipeline.Ozone adds concentration 0.5-0.7mg/L, and pH value, at 6.5-7.5, is asked as 20-30 minute during oxidation, CODcr, BODs clearance about 70%, chroma removal rate about 80/.
(e) depth-type filtration processing procedure
For guaranteeing effluent quality, stably reaching the standard of recycle-water, adopt three layer filtration district, a metafiltration material is quartz sand, and two metafiltration material are fibrous nodules, and three-layer filter is the activated carbon of 20-30 angstrom of micropore.Utilize multilamellar filtrate principle that SS, CODcr, BODs colourity etc. remaining in waste water is caught, adsorb, filtration treatment, make fresh water (FW) obtain purification and recycle.
By the technique waste water of embodiment 1 before treatment after index detect, result is in Table 1.
Table 1
Technique according to embodiments of the present invention, pulp yield reaches more than 80%.
After Pyatyi processes, fresh water (FW) has reached the standard that workshop recycles；Ashes processing after absorption is non-burning brick；ANTHRACITE FILTER MEDIA after filtration is used for boiler oil；Biogas produced by anaerobism is used for generating electricity, and watering place science and engineering section uses；Anaerobic-aerobic mud is used for processing bio-fertilizer after treatment.Therefore whole production process had both reached zero-emission, saved again the energy, had huge economic benefit and social benefit.
The invention still further relates to a kind of compound stalk fibre seperator, Fig. 1 is the front view of the compound stalk fibre seperator of the present invention；Fig. 2 is the left view of the compound stalk fibre seperator of the present invention.
As depicted in figs. 1 and 2, compound stalk fibre seperator includes: base, frame, feed arrangement, reducing mechanism, drawing mechanism, actuating device, wherein,
Frame is installed on base, including first support the 11, second support the 12, the 3rd support 13, the second support 12 between first 11 and the 3rd in the middle of support 13,
Actuating device includes upper and lower two countershafts and idler gear, lower rotary shaft 51 is installed between the first support 11 and the 3rd support 13, upper rotating shaft 52 is installed between the second support 12 and the 3rd support 13, every countershaft is generally aligned in the same plane, upper and lower two countershafts, by being installed on idler gear 53 transmission of the 3rd support, are isolated between upper and lower two countershafts and compound stalk fibre seperator are divided into upper and lower two working areas；
Feed arrangement includes feeding warehouse 21, upper and lower two pairs of feed auger, wherein feeding warehouse 21 is divided into lower charging aperture 211 and upper feeding mouth 212 by the second support 12, lower feed auger 221 is installed on lower rotary shaft 51, connect with lower charging aperture 211, upper feeding spiral 222 is installed on rotating shaft 52, connects with upper feeding mouth 212；
Reducing mechanism connects with feed arrangement, including crushing bin 31, upper and lower two pairs of break bars, wherein descends break bar 321 to be installed on lower rotary shaft 51, and upper break bar 322 is installed on rotating shaft 52, and the blade of every pair of break bar is interlaced to be interlocked；
Drawing mechanism connects with reducing mechanism, including upper and lower two discharging spirals 41 and 42, vertical discharging spiral 43, bottom discharge spiral 41 connects with the lower working area of crushing bin 31, top discharge spiral 42 connects with the upper working area of crushing bin 31, and upper and lower two discharging spirals 41 all connect with vertical discharging spiral 43 with 42.
As depicted in figs. 1 and 2, the compound stalk fibre seperator of the present invention also includes distributing means for power supply, reductor, motor, motor provides power for rotating shaft, and power is distributed to two lower rotary shafts 51 by distributing means for power supply simultaneously, then is driven upper rotating shaft 52 to rotate by lower rotary shaft 51.
The material put into from feeding warehouse 21 respectively enters upper feeding mouth 212 and lower charging aperture 211, two working areas up and down of crushing bin 31 are respectively enterd under the effect of upper and lower two pairs of feed auger, form fiber fines through the extruding repeatedly of upper and lower two pairs of break bars respectively, be finally threaded into vertical discharging spiral through upper and lower two pairs of dischargings and discharge respectively.
By the structure adopting a motor to be two working area input powers, the compound stalk fibre separator structure of the present invention is simple and easily operates, work efficiency is greatly improved, straw enters and forms fiber fines shape behind compound stalk fibre seperator inside under the extruding and kneading repeatedly of break bar, it is to avoid plant the generation of powder in a large number；Owing to straw is processed to tiny velvet shape, this makes the follow-up slurry that High Temperature High Pressure highly basic strong acid method need not be adopted with straw for the pulping process of raw material just can to produce high-quality, has reached cleaning and has produced the purpose of energy-saving and emission-reduction.
Claims (10)
1. the heat of oxidation rubs a combination legal system straw mechanical pulp technique with the hands, including:
(1) by straw cutting and carry out ozonization；
(2) material after ozonization is concentrated；
(3) material after concentration is delivered to compound straw seperator and carry out first paragraph heat stranding；
(4) material after first paragraph heat is rubbed with the hands is transported in even steam device and carries out even steam；
(5) single entry straw seperator of being made a gift to someone by the material after even steam carries out second segment heat stranding；
(6) material after second segment heat is rubbed with the hands is transported in the latent device that disappears and carries out ozone oxidation；
(7) material after the latent device that disappears processes is sent into disc seperator and carry out wire-dividing broom purification；
(8) low for the material after wire-dividing broom purification dense screening is obtained straw mechanical pulp.
2. the heat of oxidation according to claim 1 rubs combination legal system straw mechanical pulp technique with the hands, including:
(1) in pulper, ozone solution is pumped into, then by straw cutting dedusting and put in pulper, stirring oxidation 20-30 minute；
(2) joining in dewaterer by the material after ozonization, being concentrated into mass dryness fraction is 20-30%；
(3) the material conveying worm after concentration is delivered to compound straw seperator and carry out first paragraph heat stranding, with steam by the heating material in conveying worm to 70-90 DEG C；
(4) material after first paragraph heat is rubbed with the hands is transported in even steam device, heats to 90-100 DEG C and even steam 50-70 minute with steam；
(5) single entry straw seperator of being made a gift to someone by the material after even steam carries out second segment heat stranding；
(6) at the addition ozone solution in latent device that disappears, the material after second segment heat is rubbed with the hands is transported to and disappears in latent device, aoxidize 50-70 minute；
(7) material after the latent device that disappears processes is sent into disc seperator and carry out wire-dividing broom purification；
(8) low for the material after wire-dividing broom purification dense screening is obtained straw mechanical pulp.
3. the heat of oxidation according to claim 1 and 2 rubs combination legal system straw mechanical pulp technique with the hands, wherein,
In step (1) and step (6), the concentration of ozone is 50-70g/m3；Treatment temperature is 15-25 DEG C.
4. the heat of oxidation according to claim 1 and 2 rubs combination legal system straw mechanical pulp technique with the hands, wherein,
In step (3), material steam is brought rapidly up to 70-90 DEG C before entering conveying worm by material after concentration.
5. the heat of oxidation according to claim 1 and 2 rubs combination legal system straw mechanical pulp technique with the hands, wherein,
Described straw includes the straw of Semen Tritici aestivi, Fructus Hordei Vulgaris, Semen Maydis, Oryza sativa L., Sorghum vulgare Pers. and phragmites communis.
6. the heat of oxidation according to claim 1 and 2 rubs combination legal system straw mechanical pulp technique with the hands, also includes Waste water treatment technology, and described Waste water treatment technology includes:
(1) materializing strategy
By technique waste water successively through fine fack interception, Microfilter filtration, ashes adsorption bleaching, ANTHRACITE FILTER MEDIA filtration treatment；
(2) biochemical treatment
Waste water after materializing strategy, passes sequentially through following process device and processes: hydrolysis acidification pool, anaerobic reactor, bioselection pond, oxidation ditch, second pond；
(3) flocculation treatment
With flocculant, the waste water after biochemical treatment is processed；
(4) oxidation processes
Waste water ozone through flocculation treatment is further processed；
(5) depth-type filtration processes
Oxidation-treated waste water is processed through quartz sand, fibrous nodules and activated carbon filtration successively.
7. the heat of oxidation according to claim 6 rubs combination legal system straw mechanical pulp technique with the hands, and described Waste water treatment technology includes:
(1) materializing strategy
I () waste water reclaims fiber fines through fine fack；
(ii) through Microfilter filtering suspended particles thing；
(iii) ashes mix with waste water and carry out adsorption bleaching；
(iv) filter through ANTHRACITE FILTER MEDIA；
(2) biological treatment
Technique waste water, after materializing strategy, passes sequentially through following process device and processes:
(i) hydrolysis acidification pool, acidificatoin time 4-6 hour, resolves into the Organic substance of easily degraded by hard-degraded substance；
(ii) anaerobic reactor, water temperature 30-37 DEG C, pH value 6.5-7.5, waste water stops more than 15 hours in anaerobic reactor；
(iii) bioselection pond, creates the ecological environment being conducive to development flocculability antibacterial, effectively suppresses hyphomycetic amount reproduction, overcomes sludge bulking, improves the stability that biosystem runs；
(iv) oxidation ditch, adopts efficient Gas feeding jet-flow aeration technique, dissolved oxygen 1-2mg/L, and water temperature 15-30 DEG C, nutrient substance adds N and P by COD:N:P=800:5:1, and pH value is 6.5-7.5, and aerobic time is 7-9 hour；
V () second pond, realizes mud-water separation at second pond；
(3) coagulating treatment
With flocculant, the waste water after biochemical treatment being processed, flocculant concentration is 8-10mg/L, pH is 6.5-7.5；
(4) oxidation processes
With ozone, waste water being further processed, ozone adds concentration 0.5-0.7mg/L, and pH value is at 6.5-7.5, and oxidization time is 20-30 minute；
(5) depth-type filtration processes
Oxidation-treated waste water is adopted three layer filtration, and a metafiltration material is quartz sand, and two metafiltration material are fibrous nodules, and three-layer filter is the activated carbon of 20-30 angstrom of micropore.
8. the heat of oxidation according to claim 6 or 7 rubs combination legal system straw mechanical pulp technique with the hands, wherein,
In materializing strategy process, the ratio of ashes and waste water is 1:4-6；
In During Coagulation Process, flocculant is selected from aluminum chloride and polyacrylamide.
9. the heat of oxidation according to any of the above claim rubs combination legal system straw mechanical pulp technique with the hands, wherein, described compound stalk fibre seperator includes: base, frame, feed arrangement, reducing mechanism, drawing mechanism, actuating device, wherein frame is installed on base, feed arrangement includes charging aperture and feed auger, reducing mechanism includes break bar, actuating device includes rotating shaft, drawing mechanism includes discharging spiral, rotating shaft is installed in frame, same rotating shaft is provided with feed auger and break bar, it is characterized in that: feed arrangement, reducing mechanism, drawing mechanism, actuating device is divided into two or more working area.
10. the heat of oxidation according to claim 9 rubs combination legal system straw mechanical pulp technique with the hands, wherein,
Described frame includes the first support, the second support, the 3rd support, and the second support is between first and in the middle of the 3rd support；
Described actuating device includes upper and lower two countershafts, and wherein lower rotary shaft is installed between the first support and the 3rd support, and upper rotating shaft is installed between the second support and the 3rd support；
Described feed arrangement includes feeding warehouse, upper and lower two pairs of feed auger, and wherein feeding warehouse is divided into upper and lower two charging apertures by the second support, connects with two working areas of feed arrangement respectively, and upper feeding spiral is installed on rotating shaft, and lower feed auger is installed on lower rotary shaft；
Described reducing mechanism includes crushing bin, upper and lower two pairs of break bars, wherein goes up break bar and is installed on rotating shaft, and lower break bar is installed on lower rotary shaft, and the blade of every pair of break bar is interlaced to be interlocked；
Described drawing mechanism includes upper and lower two discharging spirals, and top discharge spiral connects with the upper working area of reducing mechanism, and bottom discharge spiral connects with the lower working area of reducing mechanism.
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