CN106049143A - Fiber board production method free of sewage discharge - Google Patents
Fiber board production method free of sewage discharge Download PDFInfo
- Publication number
- CN106049143A CN106049143A CN201610473077.XA CN201610473077A CN106049143A CN 106049143 A CN106049143 A CN 106049143A CN 201610473077 A CN201610473077 A CN 201610473077A CN 106049143 A CN106049143 A CN 106049143A
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- China
- Prior art keywords
- water
- wood chip
- washing
- production
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- D21B1/023—Cleaning wood chips or other raw materials
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Processing Of Solid Wastes (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention provides a fiber board production method free of sewage discharge. The method includes technical steps of (1) water cleaning of wood chips and impurity separation; (2) temperature rise treatment of the wood chips; (3) regular water replenishment of a water cleaning system. According to the invention, fiber board front-segment production procedures are optimized. A method of heating the wood chips indirectly instead of preheating the wood chips with water steam is adopted during a pre-stewing process, so that sewage generation caused by that excessive organic material in the wood chip dissolves in hot water (condensed water of steam) is avoided. Sewage generation is prevented during the whole production process. No sewage treatment device is needed and only regular replenishment of fresh water is needed. The mechanical property and appearance quality of boards produced by adopting the method are not distinctively different from those of boards produced by adopting a conventional method. In a case of a fiber board factory with an annual yield of 100 thousand cubic meters, treatment of 264 thousand tons of sewage is saved each year and the economic benefit is over 4,600,000 yuan. The method provided by the invention has deep practical meaning to ecological production of fiber boards.
Description
Technical field
The present invention relates to the production method of a kind of dry-process fiberboard hoop structure, belong to the wood-based plate in timber industry
Manufacturing technology field.
Background technology
In fiberboard production processes, wood chip producing, stack, transport and during handling etc., usually can infiltrate
The foreign material disadvantageous to heat mill process such as stone, sand, even metal, are using commodity purchased wood chip or saw lumber residue as life
When producing raw material, it is necessary to wood chip is washed, in order to by foreign material such as the metal mixed in wood chip, stone and sands at wood chip
Weed out, to protect the visual plants such as defibrator before entering heat mill process.The following effect of chip washing: (1) reduces
The abrasion of plant equipment, such as, reduce the abrasion of the feed auger of defibrator；(2) fiber quality is improved.This is because wood chip warp
After crossing washing, the moisture content of wood chip uniformly and is easily controlled, and wood chip is during steaming mill, and the dispersibility of fiber just ratio is more uniform, heat
The fiber quality ground is relatively good；Wood chip is aqueous uniformly, and after defibrator process, fiber can guarantee that stable moisture content；(3)
Sheeting process need not often adjust, the steady quality of plate, and plate production rate is high；(4) energy is saved；(5) reduce production line to run
Expense and the maintenance cost of plant equipment；(6) glue consumption is saved.After considering these factors, water wash system is set, the most aobvious
Obtain the most necessary.
But chip washing also creates waste water, chip washing draining, stopper during in Fibreboard Production, waste water includes production line
The waste water such as spiral squeezing water, mainly contain the float such as silt particle, wood powder and cellulose, lignin, hemicellulose, resinic acid, length
The dissolved organic matters such as chain fatty acid, tannins compound, belong to high concentration, waste water difficult for biological degradation.Domestic had A/B raw
Change method, ABR-SBR technique, ABR-biological contact oxidation process, air supporting-hydrolysis acidification-UASB-Aerobic Process for Treatment method, mechanical filter-
Air supporting A2/O2-biological carbon filtration, acidification hydrolization-Anaerobe catalytic oxidation-oxidation ditch-combined coagulant technology method, WJ+ flocculation sediment
The methods such as dry-process fiberboard waste water process such as+ABR+SBR integrated conduct method.
In terms of the fibre-board plant producing 10 ten thousand steres per year, waste water produced by its production process is about 50m3/d.And it is current
Simply waste water is carried out precipitation drags for slag to the supporting waste water treatment measure of most of producers, carries out preliminary treatment, does not reaches up to standard
The requirement of discharge.Waste water can only be sent into steaming and decocting cylinder, eventually through flue gas drying, hectic fever together with wood chip by the producer then having
Waste water can be heated to be water vapour outwards to discharge.
For the sewage produced during fundamentally solving Fibreboard Production, the present invention uses and reduces production process as far as possible
Middle thinking waste water occur and solution, by innovating the production technology of fibre board, make not produce during cork screw as far as possible
Raw waste water, the solubility such as such cellulose, lignin, hemicellulose, resinic acid, long-chain fatty acid, tannins compound is organic
Thing is nearly free from.Water in Fibreboard Production can be recycled by precipitation and slagging-off, only need to add in system is run
Add a small amount of supplementary water, it is not necessary to conventional wastewater biochemical treatment process, produce the work bringing novelty for fibre board ecological
Skill, for a factory producing 10 ten thousand steres per year, can produce the improvement system of waste water by optimizing, transform fibre board every year
System, minimizing processes waste water 26.4 ten thousand tons, reduces and removes waste water COD 2352 tons, and year produces economic benefit more than 4,600,000 yuan.
The present invention utilizes the optimization of fibre board front-end-of-line, uses indirect heating wood chips during wood chip pre-cooked, reduces and produces
Time too much water vapour directly preheated wood chip, reduce the dissolving in the hot water of the organic matter in wood chip, nothing in production process
Sewage produces, it is not necessary to increase biochemical wastewater treatment equipment again, and ecological production of dry-process fiberboard is had far-reaching realistic meaning.
Summary of the invention
What the present invention proposed is the production method of a kind of fibre board hoop structure, can fundamentally solve Fibreboard Production
During the sewage that produces, can make not produce during cork screw waste water, such cellulose, lignin, hemicellulose, resinic acid,
The dissolved organic matters such as long-chain fatty acid, tannins compound are nearly free from.And by the water in Fibreboard Production by precipitation
Recycle with slagging-off, in system is run, only need to periodically add a small amount of supplementary water, it is ensured that zero sewage in Fibreboard Production
Ecological production.
The technical solution of the present invention: the production method of a kind of fibre board hoop structure, comprises the technical steps that:
(1) washing of wood chip and the separation of foreign material, the waste water of chip washing passes through two-stage precipitation, first by broken little wooden slag, bark
Taken away by guipure, then use as fuel；Silt, rubble and little iron block pass through secondary precipitation, and iron block passes through magnet adsorption
Collect, then by solid-liquid separating machine, under the effect of extrusion spiral auger, the effect that the moisture in material is filtered at limit pressure zone
Lower extrusion mesh screen, silt fills as soil, and the water of clarification can continue cycling through use；
(2) hyperthermic treatment of wood chip, is heated to 30-80 DEG C by the water in chip washing system, and wood chip is temperature while washing
Can raise, owing to washing time is short and temperature is low, the dissolving in water of the solable matter in timber is few, the impact on water quality
Little；
(3) the regular moisturizing of water wash system, wood chip water suction and waste material take away portion of water, after water wash system runs a period of time,
Discharge reduction, need to supplement fresh water in time and enter blood circulation when chip washing, takes away portion with the water suction of supplementary wood chip and waste material
Divide moisture, thus ensure the ecological production of zero sewage in Fibreboard Production.
Changing into by heating fin such as steam by the heating of logical steam, fin carrys out the method for heating wood chips again, thus will
The temperature of wood chip improves.These three method may ensure that the wood chip waste water when screw extrusion enters defibrator without high pollution squeezes
Go out.Additionally by the waste water of chip washing by two-stage precipitation, first broken little wooden slag, bark etc. are taken away by guipure, then make
Use for fuel；Silt, rubble and little iron block etc. are by secondary precipitation, and iron block is collected by magnet adsorption, then passes through solid-liquid
Seperator, under the effect of extrusion spiral auger, extrudes mesh screen, silt etc. under the effect that limit pressure zone is filtered by the moisture in material
Fill as soil.
Advantages of the present invention: fibre board leading portion production process is optimized by the present invention, reduces too much water when producing
Steam directly preheats wood chip, reduces the organic matter too much in wood chip dissolving in hot water (condensed water of steam) and generates dirt
Water, produces without sewage in production process, it is not necessary to increase sewage disposal device again, through the trail run more than 2 years, fibre-board plant without
Biochemical wastewater treatment equipment, only needs regular replenishment fresh water, and the sheet material mechanical property of production and presentation quality are without significant change.This
Ecological production of dry-process fiberboard had far-reaching realistic meaning.
Detailed description of the invention
Fibre board ecology production method, comprises the technical steps that:
A, the washing of wood chip and the separation of foreign material, the waste water of chip washing passes through two-stage precipitation, first broken little wooden slag, bark is led to
Cross guipure to take away, then use as fuel；Silt, rubble and little iron block pass through secondary precipitation, and iron block is received by magnet adsorption
Collection, then by solid-liquid separating machine, under the effect of extrusion spiral auger, by the moisture in material under the effect that limit pressure zone is filtered
Extrusion mesh screen, silt fills as soil；
B, the hyperthermic treatment of wood chip, be heated to 30-80 DEG C by the water in chip washing system, wood chip temperature meeting while washing
Raising, owing to washing time is short, the dissolving in water of the solable matter of timber is few, and the impact on water quality is little, in this operation
Temperature can regulate as required, and in wood chip, moisture content can also be as desired to regulate；
C, the regular moisturizing of system.Wood chip water suction and waste material take away portion of water.After water wash system runs a period of time, the water yield subtracts
Few, need regular replenishment fresh water.
Embodiment 1
The medium density fibre board (MDF) enterprise of 8 ten thousand steres is produced in one, Fujian per year, after the fine receiving environmental administration time and again, feels have
Its sewage disposal system is improved by necessity, when wood chip pre-cooked, is improved to logical steam heating by directly leading to steam heating
Fin, fin carrys out the method for heating wood chips again, thus the temperature of wood chip is improved.Then the waste water of chip washing is passed through
Two-stage precipitation, is first taken away broken little wooden slag, bark by guipure, then uses as fuel；Silt, rubble and little iron block are logical
Crossing secondary precipitation, then by solid-liquid separating machine, iron block is collected by magnet adsorption, under the effect of extrusion spiral auger, and will
Moisture in material extrudes mesh screen under the effect that limit pressure zone is filtered, and silt fills as soil, and the water of clarification can continue
Recycle；Owing to wood chip water suction and waste material take away portion of water, after water wash system runs a period of time, discharge reduction, need to be
Supplement fresh water during chip washing in time and enter blood circulation, take away portion of water with the water suction of supplementary wood chip and waste material.
By above improvement, production phase sewage never again produces, and is closed down by original sewage disposal device.Often
Year minimizing processes waste water 210,000 tons, reduces more than 3,700,000 yuan expenditures of sewage disposal expense, and this runs system without sewage and has stablized fortune
Row more than 4 years.
Embodiment 2
The medium density fibre board (MDF) enterprise of this producer the most newly-built annual output 25 ten thousand stere, when design by sewage disposal device and base
Build needs 5,000,000 directly to save, use directly when washing, the temperature of water is raised to 40～60 DEG C, the most just wood chip is carried
Defibrator process is carried out to defibrator.Then by the waste water of chip washing by two-stage precipitation, first broken little wooden slag, bark are passed through guipure
Take away, then use as fuel；Silt, rubble and little iron block pass through secondary precipitation, and then by solid-liquid separating machine, iron block leads to
Cross magnet adsorption to collect, under the effect of extrusion spiral auger, the moisture in material is extruded under the effect that limit pressure zone is filtered net
Sieve, silt fills as soil, and the water of clarification can continue cycling through use；Owing to wood chip water suction and waste material take away part water
Point, after water wash system runs a period of time, discharge reduction, fresh water need to be supplemented when chip washing in time and enter blood circulation,
Portion of water is taken away with the water suction of supplementary wood chip and waste material.
By above improvement, production phase sewage never again produces, and annual minimizing processes waste water 660,000 tons, reduces dirt
Water processing cost more than 11,500,000 yuan expenditure, this was without sewage operation system stable operation more than 2 years.
Claims (4)
1. a production method for fibre board hoop structure, is characterized in that the method comprises the technical steps that:
(1) washing of wood chip and the separation of foreign material, the waste water of chip washing passes through two-stage precipitation, first by broken little wooden slag, bark
Taken away by guipure, then use as fuel；Silt, rubble and little iron block pass through secondary precipitation, then pass through solid-liquid separation
Machine, iron block is collected by magnet adsorption, under the effect of extrusion spiral auger, the effect that the moisture in material is filtered at limit pressure zone
Lower extrusion mesh screen, silt fills as soil, and the water of clarification can continue cycling through use；
(2) hyperthermic treatment of wood chip, is heated to 30-80 DEG C by the water in chip washing system, and wood chip is temperature while washing
Can raise, owing to washing time is short, the dissolving in water of the solable matter of timber is few, and the impact on water quality is little；
(3) the regular moisturizing of water wash system, wood chip water suction and waste material take away portion of water, after water wash system runs a period of time,
Discharge reduction, need to supplement fresh water in time and enter blood circulation when chip washing, takes away portion with the water suction of supplementary wood chip and waste material
Divide moisture, thus ensure the ecological production of zero sewage in Fibreboard Production.
The production method of fibre board hoop structure the most according to claim 1, is characterized in that described step (2) wood chip
Hyperthermic treatment: when being in the Seasonal Production in winter of cold, it is necessary to have the pre-heat treatment, it is ensured that thaw before mill fiber；As by wood chip
Pre-cooked, uses fin heating wood chips, thus reduces wood chip waste water when cork screw extrudes and produce during wood chip pre-cooked, this
The dissolved organic matters such as cellulose in sample trees sheet, lignin, hemicellulose, resinic acid, long-chain fatty acid, tannins compound
It is nearly free from.
The production method of fibre board hoop structure the most according to claim 2, is characterized in that described wood chip pre-cooked
Time, it is advanced through steam heating fin, the method carrying out heating wood chips with fin again by directly leading to steam heating, thus incites somebody to action
The temperature of wood chip improves.
The production method of fibre board hoop structure the most according to claim 2, is characterized in that the intensification of described wood chip
Process, chip washing and preheating are combined, while washing, be preheating to 30～80 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610473077.XA CN106049143A (en) | 2016-06-27 | 2016-06-27 | Fiber board production method free of sewage discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610473077.XA CN106049143A (en) | 2016-06-27 | 2016-06-27 | Fiber board production method free of sewage discharge |
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| Publication Number | Publication Date |
|---|---|
| CN106049143A true CN106049143A (en) | 2016-10-26 |
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| CN201610473077.XA Pending CN106049143A (en) | 2016-06-27 | 2016-06-27 | Fiber board production method free of sewage discharge |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996036424A1 (en) * | 1995-05-18 | 1996-11-21 | Bwt Aktiengesellschaft | Process and facility for purifying exhaust air, exhaust gases and waste water from a wood processing facility |
| CN101284393A (en) * | 2007-04-10 | 2008-10-15 | 杨明杰 | Medium-density fiberboard production waste drainage closed cycle loop back technique |
| CN102351364A (en) * | 2011-09-01 | 2012-02-15 | 中国制浆造纸研究院 | Treatment method of wood chip washing waste water |
| CN102442740A (en) * | 2011-10-26 | 2012-05-09 | 文安县天华密度板有限公司 | Processing method for zero discharge of wood chip washing waste water |
| CN103112983A (en) * | 2013-02-19 | 2013-05-22 | 哥乐巴环保科技(上海)有限公司 | Technical process and apparatus for sewage treatment in artificial wood board production |
-
2016
- 2016-06-27 CN CN201610473077.XA patent/CN106049143A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996036424A1 (en) * | 1995-05-18 | 1996-11-21 | Bwt Aktiengesellschaft | Process and facility for purifying exhaust air, exhaust gases and waste water from a wood processing facility |
| CN101284393A (en) * | 2007-04-10 | 2008-10-15 | 杨明杰 | Medium-density fiberboard production waste drainage closed cycle loop back technique |
| CN102351364A (en) * | 2011-09-01 | 2012-02-15 | 中国制浆造纸研究院 | Treatment method of wood chip washing waste water |
| CN102442740A (en) * | 2011-10-26 | 2012-05-09 | 文安县天华密度板有限公司 | Processing method for zero discharge of wood chip washing waste water |
| CN103112983A (en) * | 2013-02-19 | 2013-05-22 | 哥乐巴环保科技(上海)有限公司 | Technical process and apparatus for sewage treatment in artificial wood board production |
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Application publication date: 20161026 |
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