CN104174480A - Cleaning and separating method for wood chips - Google Patents
Cleaning and separating method for wood chips Download PDFInfo
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- CN104174480A CN104174480A CN201410393990.XA CN201410393990A CN104174480A CN 104174480 A CN104174480 A CN 104174480A CN 201410393990 A CN201410393990 A CN 201410393990A CN 104174480 A CN104174480 A CN 104174480A
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Abstract
The invention discloses a cleaning and separating method for wood chips and belongs to the technical field of wood processing. The method comprises a chip screening process and a circulating water washing process; a chip screening and circulating water washing system is adopted; the system comprises a screening machine, a water washing machine and six sequentially communicated sedimentation tanks; the water outlet of the water washing machine is communicated with the water inlet of the first sedimentation tank; the water outlet of the sixth sedimentation tank is communicated with a pump; the water outlet of the pump is communicated with the back washing water inlet of the water washing machine and the wood chip and water inlet of the water washing machine through a flush valve. The cleaning and separating method comprises the following steps: a, a hole is formed in a middle layer screen mesh, near the feed port, of the screening machine, so that the wood chips can scour the screen mesh when falling; b, the enclosing wall of the sixth sedimentation tank is heightened and the water outlet of the sixth sedimentation tank is elevated; c, the opening degree of the flush valve is adjusted; d, the operating frequencies of the flush valve and a blowdown valve are adjusted. Through the adoption of the cleaning and separating method, the problems that as the impurities such as sand in the wood chips are not cleaned completely, device abrasion such as sheet grinding in the follow-up procedures can be solved.
Description
Technical field
The present invention relates to wood processing technique field, especially a kind of clean separation method of the wood chip as medium density fiber board raw material.
Background technology
In the production process of medium density fibre board (MDF), will be through the choosing of raw material, chip, screen, washing, boiling are softening, the operation of defibrator process etc., if the impurity such as the stone containing in raw material wood chip, fine sand, iron can not be separated completely, will accelerate the wearing and tearing to equipment such as abrasive discs, not only increase the consumption of abrasive disc, also can increase the utilization rate of power consumption and the equipment of grinding machine.The clean separation method of existing wood chip screening and washing, wood chip first to be sent into screening machine isolate after the impurity such as stone, fine sand, iron, sending into rinsing machine system further cleans wood chip again, wood chip screening and a circulating water wash system as shown in Figure 1, comprise screening machine 1, rinsing machine 2 and the first sedimentation basin 7, the second sedimentation basin 8, the 3rd sedimentation basin 9, the 4th sedimentation basin 10, the 5th sedimentation basin 11 and the 6th sedimentation basin 12 that communicate successively; The top of rinsing machine 2 offers the import 2a of wood chip and water, and the middle part of rinsing machine offers the outlet 2b of wood chip, and the bottom of rinsing machine 2 offers water inlet 2c and the sewage draining exit 2d of delivery port 2e, backwash; The top of the first sedimentation basin 7 offers water inlet 7a, and the bottom of the 6th sedimentation basin 12 offers delivery port 12b; Wherein sewage draining exit 2d is connected with blowoff valve 4 by pipeline, the delivery port 2d of rinsing machine 2 is connected with the water inlet 7a of the first sedimentation basin 7 by the first valve 6, the delivery port 12b of the 6th sedimentation basin 12 is communicated with pump 13, the water inlet 2c of the delivery port of pump 13 by flushing valve 5 and the backwash of rinsing machine 2, by second valve 3, is connected with the wood chip of rinsing machine 2 and the import 2a of water.This wood chip clean separation method exists following problem: 1, because screening machine 1 is placed in outdoor work for a long time, after the experience rainy day, wood chip particle will be accumulated on screen cloth face, easily makes screen cloth mesh stop up, and causes the foreign material such as fine sand to be difficult to separation; 2, when the water yield is sufficient, easily make the first sedimentation basin 7 directly be communicated with the 6th sedimentation basin 12, cause the short circuit of sedimentation basin water route, lost the due circulation precipitation in pond; 3, because the delivery port 12b of the 6th sedimentation basin 12 arranges too lowly, pump 13 is easily drawn into circulating water wash machine system again the silt in sedimentation basin; 4, the hydraulic pressure of rinsing machine back-flushing is too high, and the silt that is deposited in rinsing machine bottom is rushed in to circulating water wash machine system again; 5, in rinsing machine system, blowoff valve 4 and flushing valve 5 operating frequencies are unreasonable, cause the foreign material depositions such as silt too much, block by-pass valve control, cause silt not discharge in time.Therefore be badly in need of a kind of wood chip clean separation method of efficient low-power consumption.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of wood chip clean separation method, and this method can solve the problem that the impurity such as silt in wood chip clean the equipment attritions such as abrasive disc that not exclusively cause subsequent handling.
In order to address the above problem, the technical solution adopted in the present invention is: this wood chip clean separation method, comprises wood chip screening process and circulating water wash process; Adopt a kind of wood chip screening and circulating water wash system, this system includes screening machine, rinsing machine and the first sedimentation basin communicating successively, the second sedimentation basin, the 3rd sedimentation basin, the 4th sedimentation basin, the 5th sedimentation basin and the 6th sedimentation basin; The screen cloth that haves three layers is set in described screening machine, on described rinsing machine, offer the sewage draining exit being communicated with blowoff valve, the delivery port of rinsing machine is connected with the water inlet of the first sedimentation basin by the first valve, the delivery port of the 6th sedimentation basin is communicated with pump, and the delivery port of pump is communicated with the water inlet of the backwash of rinsing machine, by second valve, is communicated with the wood chip of rinsing machine and the import of water by flushing valve; Wherein: a, on the screen cloth of the middle level of described screening machine, corresponding to the feeding mouth place of described screening machine, to offer diameter be the hole of 50 centimetres, washes away lower screen when wood chip is fallen;
B, the enclosure wall of described the 6th sedimentation basin is increased to 40 centimetres, and to make the 6th delivery port of sedimentation basin and the distance of its bottom surface be 120 centimetres;
C, to regulate the aperture of described flushing valve to make the flow velocity of backwashing water be 0.3 meter per second;
D, the do action time of described flushing valve and blowoff valve is all adjusted to 180 seconds.
Owing to having adopted technique scheme, the present invention compared with prior art has following beneficial effect:
1, owing to offering diameter corresponding to the feeding mouth place of described screening machine on the net at upper sieve, be the hole of 50 centimetres, when wood chip is fallen, wash away lower screen; In real work, make not building blocks bits particle of lower screen surface, mesh does not stop up, and has guaranteed the clean of screen cloth.
2, due to the enclosure wall of the 6th sedimentation basin is increased to 40 centimetres, prevent that the first sedimentation basin is directly communicated with and causes short circuit with the 6th sedimentation basin, make the water of sedimentation basin obtain progressively precipitating purification, water purification is effective.
3, because the 6th delivery port of sedimentation basin and the distance of its bottom surface are 120 centimetres; Prevent that the sediments such as silt are drawn into circulating water wash system again.
4, because the aperture of control valve 5 makes the flow velocity of backwashing water, be 0.3 meter per second; Prevent that back-flushing is excessive, the silt etc. that is deposited in rinsing machine bottom is rushed in to circulation again.
5, due to the do action time of flushing valve and blowoff valve in rinsing machine system was shortened to 180 seconds from 240 seconds, can drain in time the impurity such as silt in rinsing machine.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of wood chip screening and circulating water wash system.
The specific embodiment
Below in conjunction with accompanying drawing embodiment, the invention will be further described:
This wood chip clean separation method, comprises wood chip screening process and circulating water wash process; Adopt wood chip screening and the circulating water wash system shown in a kind of Fig. 1, the first sedimentation basin 7, the second sedimentation basin 8, the 3rd sedimentation basin 9, the 4th sedimentation basin 10, the 5th sedimentation basin 11 and the 6th sedimentation basin 12 that this system includes screening machine 1, rinsing machine 2 and communicates successively; The top of the first sedimentation basin 7 offers water inlet 7a, and the bottom of the 6th sedimentation basin 12 offers delivery port 12b; The top of rinsing machine 2 offers the import 2a of wood chip and water, and the middle part of rinsing machine offers the outlet 2b of wood chip, and the bottom of rinsing machine 2 offers water inlet 2c and the sewage draining exit 2d of delivery port 2e, backwash; The delivery port 2d of rinsing machine 2 is connected with the water inlet 7a of the first sedimentation basin 7 by the first valve 6 being arranged on pipeline, the delivery port 12b of the 6th sedimentation basin 12 has pump 13 by pipeline communication, the delivery port of pump 13 by be arranged on flushing valve 5 on pipeline and the backwash of rinsing machine 2 water inlet 2c, by the second valve 3 being arranged on pipeline, be connected with the wood chip of rinsing machine 2 and the import 2a of water; Wherein: a, the interior setting of screening machine 1 screen cloth that haves three layers, on the middle level screen cloth 1a at the feeding mouth place near screening machine 1, offer diameter and be the hole of 50 centimetres, when being fallen, washes away by wood chip lower screen 1b;
The enclosure wall height of b, the first sedimentation basin 7, the second sedimentation basin 8, the 3rd sedimentation basin 9, the 4th sedimentation basin 10 and the 5th sedimentation basin 11 is 4 meters, the enclosure wall height of the 6th sedimentation basin 12 is 4.4 meters, and to make the delivery port 12b of the 6th sedimentation basin 12 and the distance of its bottom surface be 120 centimetres;
It is 0.3 meter per second that the aperture of c, adjusting flushing valve 5 makes the flow velocity of backwashing water;
D, the do action time of flushing valve 5 and blowoff valve 4 is all adjusted to 180 seconds.
Claims (1)
1. a wood chip clean separation method, comprises wood chip screening process and circulating water wash process; Adopt a kind of wood chip screening and circulating water wash system, this system includes screening machine (1), rinsing machine (2) and the first sedimentation basin (7) communicating successively, the second sedimentation basin (8), the 3rd sedimentation basin (9), the 4th sedimentation basin (10), the 5th sedimentation basin (11) and the 6th sedimentation basin (12); The screen cloth that haves three layers is set in described screening machine (1), on described rinsing machine (2), offer the sewage draining exit (2d) being communicated with blowoff valve (4), the delivery port (2e) of rinsing machine (2) is connected with the water inlet (7a) of the first sedimentation basin (7) by the first valve (6), the delivery port (12b) of the 6th sedimentation basin (12) is communicated with pump (13), and the delivery port of pump (13) is communicated with the water inlet (2c) of the backwash of rinsing machine (2), by second valve (3), is communicated with the wood chip of rinsing machine (2) and the import (2a) of water by flushing valve (5); It is characterized in that:
A, at the upper feeding mouth place corresponding to described screening machine (1) of the middle level screen cloth (1a) of described screening machine (1), to offer diameter be the hole of 50 centimetres, washes away lower screen (1b) when wood chip is fallen;
B, the enclosure wall of described the 6th sedimentation basin (12) is increased to 40 centimetres, and to make the delivery port (12b) of the 6th sedimentation basin (12) and the distance of its bottom surface be 120 centimetres;
C, to regulate the aperture of described flushing valve (5) to make the flow velocity of backwashing water be 0.3 meter per second;
D, the do action time of described flushing valve (5) and blowoff valve (4) is all adjusted to 180 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410393990.XA CN104174480A (en) | 2014-08-12 | 2014-08-12 | Cleaning and separating method for wood chips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410393990.XA CN104174480A (en) | 2014-08-12 | 2014-08-12 | Cleaning and separating method for wood chips |
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| CN104174480A true CN104174480A (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410393990.XA Pending CN104174480A (en) | 2014-08-12 | 2014-08-12 | Cleaning and separating method for wood chips |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA908604A (en) * | 1972-08-29 | Hanaya Morimasa | Method and apparatus for washing wood chips | |
| US3765532A (en) * | 1971-07-12 | 1973-10-16 | Rex Chainbelt Inc | Wood chip washer |
| CN1559767A (en) * | 2004-03-11 | 2005-01-05 | 谭文斌 | Wood chip water cleaning technology and wood chip water cleaning equipment |
| CN101284393A (en) * | 2007-04-10 | 2008-10-15 | 杨明杰 | Medium-density fiberboard production waste drainage closed cycle loop back technique |
| CN101880980A (en) * | 2010-07-22 | 2010-11-10 | 湖南骏泰浆纸有限责任公司 | Cleaning equipment of wood chips |
-
2014
- 2014-08-12 CN CN201410393990.XA patent/CN104174480A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA908604A (en) * | 1972-08-29 | Hanaya Morimasa | Method and apparatus for washing wood chips | |
| US3765532A (en) * | 1971-07-12 | 1973-10-16 | Rex Chainbelt Inc | Wood chip washer |
| CN1559767A (en) * | 2004-03-11 | 2005-01-05 | 谭文斌 | Wood chip water cleaning technology and wood chip water cleaning equipment |
| CN101284393A (en) * | 2007-04-10 | 2008-10-15 | 杨明杰 | Medium-density fiberboard production waste drainage closed cycle loop back technique |
| CN101880980A (en) * | 2010-07-22 | 2010-11-10 | 湖南骏泰浆纸有限责任公司 | Cleaning equipment of wood chips |
Non-Patent Citations (1)
| Title |
|---|
| 谭红江: "木片水洗机的设计", 《林业实用技术》 * |
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Application publication date: 20141203 |
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| RJ01 | Rejection of invention patent application after publication |