CN102212979B - High-concentration pulp bleaching device - Google Patents
High-concentration pulp bleaching device Download PDFInfo
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- CN102212979B CN102212979B CN 201110144941 CN201110144941A CN102212979B CN 102212979 B CN102212979 B CN 102212979B CN 201110144941 CN201110144941 CN 201110144941 CN 201110144941 A CN201110144941 A CN 201110144941A CN 102212979 B CN102212979 B CN 102212979B
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Abstract
The invention discloses a high-concentration pulp bleaching device, which comprises a feeding mechanism and a discharge mechanism, wherein the feeding mechanism comprises a shell and a driving shaft; the interior of the shell is sequentially divided into an extruded dehydration area, a high-pressure kneading area and a pressure relief mixing area; the driving shaft is provided with a helical blade and sequentially passes through the extruded dehydration area, the high-pressure kneading area and the pressure relief mixing area; the helical blade of the extruded dehydration area is a conveying helical blade; the helical blade of the high-pressure kneading area is a reverse thrust helical blade with a discharge hole; the helical blade of the pressure relief mixing area is a positive thrust helical blade with a discharge hole; the extruded dehydration area is provided with a pulp feeding hole; the pressure relief mixing area is provided with a dosing port; the bottom of the extruded dehydration area and the high-pressure kneading area is provided with a drain cavity; a dehydration filter screen is arranged on the drain cavity; and the bottom of the drain cavity is provided with a drain port. The device has the advantages of low power consumption, high bleaching efficiency and simple structure, and is energy-saving and environmentally-friendly.
Description
Technical field
The present invention relates to paper making equipment, be specifically related to a kind of high-concentration pulp bleaching device.
Background technology
Paper-making pulping is high energy consumption, high pollution industry, be environmental contamination reduction, improve pulp bleaching efficiency, pulping bleaching in dense (＞7%), high dense (＞25%) bleaching technology development.The sewage that the low bleaching of bleaching concentration chemical consumption is high, generation is a large amount of has a large amount of water to be transferred, to increase transmitting power in the slurry course of conveying; Reaching equal bleaching action temperature low density bleaching will consume more steam and remove to heat unnecessary water.
There is complex structure in existing bleaching system, and environmental pollution is large, is unfavorable for the shortcomings such as environmental protection.
Summary of the invention
The shortcoming and defect that exists for overcoming prior art the object of the present invention is to provide that a kind of power consumption is few, bleaching efficiency is high, the high-concentration pulp bleaching device of simple in structure and energy-conserving and environment-protective.
The present invention is achieved through the following technical solutions:
A kind of high-concentration pulp bleaching device, comprise feeding mechanism and discharging mechanism, the discharge gate of this feeding mechanism is connected with the entrance of discharging mechanism, described feeding mechanism comprises housing, driving shaft, be divided into successively the extrusion dehydration district in the housing, high pressure rubbing district, the release of pressure mixed zone, be provided with helical blade on the described driving shaft and run through successively the extrusion dehydration district, high pressure rubbing district and release of pressure mixed zone, the helical blade in described extrusion dehydration district is the conveyor screw blade, the helical blade in described high pressure rubbing district is the anti-helical blade that pushes away with discharge port, the helical blade of described release of pressure mixed zone is just to push away helical blade with discharge port, described extrusion dehydration is provided with the paper pulp charging aperture in the district, described release of pressure is provided with dosing mouth on the mixed zone, the bottom in described extrusion dehydration district and high pressure rubbing district is provided with drain chamber, be provided with the dehydration filter screen on the drain chamber, the bottom of drain chamber is equipped with water discharge outlet.
Described discharging mechanism, its housing is the drum type brake housing, is provided with driving shaft in the housing, is provided with the discharging helical blade on the driving shaft, the discharging helical blade is the belt type spiral blade.
Be provided with the entrance that adds for steam or oxygen on the described discharging mechanism, be provided with material plug district at the discharging mechanism afterbody, the length in described material plug district is 10cm～20cm.
Be respectively arranged with the power drive wheel on the driving shaft of described feeding mechanism and discharging mechanism, described power drive wheel is connected with actuating unit.
High-concentration pulp bleaching device operation principle of the present invention is as follows:
(1) concentration is that 27% the paper pulp that do not float enters the extrusion dehydration district by charging aperture, carry by 4.0 compression ratio extruding through the conveyor screw blade, increasing in the extrusion dehydration district along with extruding force, slurry is compressed, the lignin that has dissolved in free water in the slurry and the fibrocyte but do not deviate from and other solvent components are extruded, and obtain concentration and be 37% high consistency stock.
(2) above-mentioned high consistency stock enters high pressure rubbing district, the helical blade in high pressure rubbing district is the anti-helical blade that pushes away with discharge port, make and carry extruding force to continue to strengthen, slurry mixes staggered advancing with " ∝ " form, be divided into two at two spiral spiral shell rib engagement place slurry streams, extruding force doubles to increase, high pressure is rubbed with the hands to grind come into being parietal layer microfibre wire-dividing broom purification, secondary wall of fibrocyte is broken.
(3), high pressure rubbing district inside spin is the anti-helical blade that pushes away with discharge port, the release of pressure mixed zone is slightly large for just pushing away helical blade and conveying capacity, causing the slurry extruding force in junction, two districts is zero, and the high extrusion of slurry is rubbed rear abrupt release and produced " sponge sucks in water " like absorbing bleaching liquid, bleaching liquid and the slurry rapid mixing that is added by dosing mouth.
(4), the helical blade that just pushes away in the release of pressure mixed zone opens discharge port by 1:3, slurry flowed through become three bursts of staggered moving ahead by one after a pitch stroke rotates a circle, and the bleaching liquid is fully mixed with high consistency stock.
(5), high consistency stock enters in the housing of discharging mechanism by discharging opening after mixing with the bleaching liquid, delivers into the high-concentration pulp bleaching reaction warehouse by the discharging helical blade; Temperature and pressure according to the high density bleaching reaction process requires adds entrance adding steam by steam or oxygen and regulates; Form the material plug of 12cm in material plug district, prevent that the steam that reacts generation from regurgitating.
Compared with prior art, the present invention has following advantage:
(1) bottom in extrusion dehydration district and high pressure rubbing district is provided with drain chamber, is provided with the dehydration filter screen on the drain chamber, and the bottom of drain chamber is equipped with water discharge outlet.The dehydration filter screen adopts the extruding of＞3.0 compression ratios, rubbing paper pulp, not only can effectively leach the pulp fiber surface free water, even DDGS and the air extrusion of having been dissolved by the medicine effect in the fibrocyte can be deviate from, and pulp density is reached more than 35%; With middle concentrated phase than reducing 10～15% water conveying capacities, Reduction of power consumption in the equal slurry course of conveying.
(2) employing is just pushing away helical blade and the anti-parallel double helical blade conveying that pushes away helical blade, need not water and send carrier, carries slurry concentration can reach more than 35% as stream, and the double helix blade is carried and can be made slurry be subject to simultaneously the mechanical agitation mixing; And existing association with pulp bleaching adopts stock pump to carry and mechanical agitation is mixed, need water to make the pulp flow carrier, the higher pumping efficiency of pulp density is lower, middle underflow pump transportation concentration＜17%, high density stock pump transportation concentration＜28% and fluctuation of service, mechanical mixer is installed in the technological process affects the slurry conveying;
(3) the spiral shell rib engagement place of double helix blade conveying of the present invention produces the height extruding and rubs the stone roller effect with the hands, and fibrocyte primary wall microfibre wire-dividing broom purification, secondary wall are broken, acceleration bleaching medicine function cells internal layer lignin, raising bleaching efficiency; The high extrusion of slurry is rubbed rear abrupt release generation " sponge sucks in water " and is seemingly absorbed liquid, makes bleaching medicament and slurry rapid mixing.
(4) helical blade that just pushes away in the release of pressure mixed zone is opened discharge port by 1:3, can make the slurry pitch stroke of flowing through become three strands by one after rotating a circle; The spiral shell rib was divided into two screw channel slurry stream when the double helix blade crossed, and under high pressure advanced with " ∝ " shape medicament is efficiently mixed with slurry.
(5) discharging mechanism adopts belt type spiral (compression ratio by＞1.0 pushes), and the material plug that discharging opening forms 10cm～20cm produces 0.2～0.5Mpa pressure; Slurry concentration high (＞35%), heat temperature raising are fast, when comparing slurry with the medium consistency bleaching device and being warmed up to 90 ℃, can reduce by 5～10% steam consumption.
(6) rotating speed of the present invention is 350～400 rev/mins, compares with the middle and high underflow pump of 1480 rev/mins of rotating speeds, and is simple in structure, simple operation, and production efficiency is high.
Description of drawings
Fig. 1 is the structural representation of high-concentration pulp bleaching device of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, high-concentration pulp bleaching device of the present invention, comprise feeding mechanism and discharging mechanism, the discharge gate 12 of this feeding mechanism is connected with the entrance of discharging mechanism, described feeding mechanism comprises housing 17, driving shaft 18, be divided into successively extrusion dehydration district 4 in the housing 17, high pressure rubbing district 5, release of pressure mixed zone 7, be provided with helical blade on the described driving shaft 18 and run through successively extrusion dehydration district 4, high pressure rubbing district 5 and release of pressure mixed zone 7, the helical blade 3 in described extrusion dehydration district 4 is the conveyor screw blade, the helical blade in described high pressure rubbing district 5 is the anti-helical blade 20 that pushes away with discharge port, the helical blade of described release of pressure mixed zone 7 is just to push away helical blade 21 with discharge port, be provided with paper pulp charging aperture 2 in the described extrusion dehydration district 4, be provided with dosing mouth 6 on the described release of pressure mixed zone 7, the bottom in described extrusion dehydration district 4 and high pressure rubbing district 5 is provided with drain chamber 16, be provided with dehydration filter screen 11 on the drain chamber 16, the bottom of drain chamber 16 is equipped with water discharge outlet 10.
Described discharging mechanism, its housing 14 is the drum type brake housing, is provided with driving shaft in the housing 14, is provided with discharging helical blade 15 on the driving shaft, discharging helical blade 15 is the belt type spiral blade.
In order to make housing 17 more firm, arrange in the periphery of housing 17 and to strengthen steel ring 19.
Be provided with on the described discharging mechanism for steam or oxygen add entrance 8, be provided with material plug district 9 at the discharging mechanism afterbody, the length in described material plug district 9 is 10cm～20cm.
Be respectively arranged with power drive wheel 1,13 on the driving shaft of described feeding mechanism and discharging mechanism, described power drive wheel 1,13 is connected with actuating unit.
The specific works principle is as follows:
(1) concentration is that 27% the paper pulp that do not float enters extrusion dehydration district 4 by charging aperture 2, carry by 4.0 compression ratio extruding through conveyor screw blade 3, increasing in extrusion dehydration district 4 along with extruding force, slurry is compressed, the lignin that has dissolved in free water in the slurry and the fibrocyte but do not deviate from and other solvent components are extruded, and obtain concentration and be 37% high consistency stock.
(2) above-mentioned high consistency stock enters high pressure rubbing district 5, the helical blade in high pressure rubbing district 5 is the anti-helical blade 20 that pushes away with discharge port, make and carry extruding force to continue to strengthen, slurry mixes staggered advancing with " ∝ " form, be divided into two at two spiral spiral shell rib engagement place slurry streams, extruding force doubles to increase, high pressure is rubbed with the hands to grind come into being parietal layer microfibre wire-dividing broom purification, secondary wall of fibrocyte is broken.
(3), high pressure rubbing district 5 inside spins are the anti-helical blade 20 that pushes away with discharge port, release of pressure mixed zone 7 is slightly large for just pushing away helical blade 21 and conveying capacity, causing the slurry extruding force in junction, two districts is zero, and the high extrusion of slurry is rubbed rear abrupt release and produced " sponge sucks in water " like absorbing bleaching liquid, bleaching liquid and the slurry rapid mixing that is added by dosing mouth 6.
(4), the helical blade 21 of just pushing away in the release of pressure mixed zone 7 opens discharge port by 1:3, slurry flowed through become three bursts of staggered moving ahead by one after a pitch stroke rotates a circle, and the bleaching liquid is fully mixed with high consistency stock.
(5), high consistency stock enters in the housing 14 of discharging mechanism by discharging opening 12 after mixing with the bleaching liquid, delivers into the high-concentration pulp bleaching reaction warehouse by discharging helical blade 15; Temperature and pressure according to the high density bleaching reaction process requires adds entrance 8 adding steam by steam or oxygen and regulates; The 9 material plugs that form 12cm in material plug district prevent that the steam that reacts generation from regurgitating.
Just can realize preferably the present invention as mentioned above.
Claims (4)
1. high-concentration pulp bleaching device, comprise feeding mechanism and discharging mechanism, the discharge gate of this feeding mechanism is connected with the entrance of discharging mechanism, it is characterized in that, described feeding mechanism comprises housing, driving shaft, be divided into successively the extrusion dehydration district in the housing, high pressure rubbing district, the release of pressure mixed zone, be provided with helical blade on the described driving shaft and run through successively the extrusion dehydration district, high pressure rubbing district and release of pressure mixed zone, the helical blade in described extrusion dehydration district is the conveyor screw blade, the helical blade in described high pressure rubbing district is the anti-helical blade that pushes away with discharge port, the helical blade of described release of pressure mixed zone is just to push away helical blade with discharge port, described extrusion dehydration is provided with the paper pulp charging aperture in the district, described release of pressure is provided with dosing mouth on the mixed zone, the bottom in described extrusion dehydration district and high pressure rubbing district is provided with drain chamber, be provided with the dehydration filter screen on the drain chamber, the bottom of drain chamber is equipped with water discharge outlet, the helical blade that just pushes away in the described release of pressure mixed zone is opened discharge port by 1:3, described discharging mechanism, its housing is the drum type brake housing, be provided with driving shaft in the housing, be provided with the discharging helical blade on the driving shaft, the discharging helical blade is the belt type spiral blade.
2. high-concentration pulp bleaching device according to claim 1 is characterized in that, is provided with the entrance that adds for steam or oxygen on the described discharging mechanism, is provided with material plug district at the discharging mechanism afterbody, and the length in described material plug district is 10cm～20cm.
3. high-concentration pulp bleaching device according to claim 2 is characterized in that, is respectively arranged with the power drive wheel on the driving shaft of described feeding mechanism and discharging mechanism, and described power drive wheel is connected with actuating unit.
4. each described high-concentration pulp bleaching device in 3 according to claim 1 is characterized in that the periphery of described housing is provided with the reinforcement steel ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110144941 CN102212979B (en) | 2011-05-31 | 2011-05-31 | High-concentration pulp bleaching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110144941 CN102212979B (en) | 2011-05-31 | 2011-05-31 | High-concentration pulp bleaching device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102212979A CN102212979A (en) | 2011-10-12 |
| CN102212979B true CN102212979B (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110144941 Expired - Fee Related CN102212979B (en) | 2011-05-31 | 2011-05-31 | High-concentration pulp bleaching device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103790060A (en) * | 2012-10-31 | 2014-05-14 | 陈根长 | Pulping and bleaching technology of new aggregation state modified pulping process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078006A (en) * | 1990-10-26 | 1993-11-03 | 友联坎普专利控股有限公司 | Pulp bleaching reactor and method thereof |
| CN2244289Y (en) * | 1995-12-20 | 1997-01-08 | 上海市农场管理局农业机械研究所 | Cylindric screen grain cleaner for combine harvester |
| CN1151460A (en) * | 1996-07-25 | 1997-06-11 | 华南理工大学 | Oxygen bleaching method of daily producing 30-50 tons medium density paper pulp |
| CN202107936U (en) * | 2011-05-31 | 2012-01-11 | 华南理工大学 | High density bleaching device for paper pulp |
-
2011
- 2011-05-31 CN CN 201110144941 patent/CN102212979B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078006A (en) * | 1990-10-26 | 1993-11-03 | 友联坎普专利控股有限公司 | Pulp bleaching reactor and method thereof |
| CN2244289Y (en) * | 1995-12-20 | 1997-01-08 | 上海市农场管理局农业机械研究所 | Cylindric screen grain cleaner for combine harvester |
| CN1151460A (en) * | 1996-07-25 | 1997-06-11 | 华南理工大学 | Oxygen bleaching method of daily producing 30-50 tons medium density paper pulp |
| CN202107936U (en) * | 2011-05-31 | 2012-01-11 | 华南理工大学 | High density bleaching device for paper pulp |
Non-Patent Citations (2)
| Title |
|---|
| 曾劲松等.高浓降流漂白塔的塔底结构.《中华纸业》.2010,第31卷(第2期),第84-87页. |
| 高浓降流漂白塔的塔底结构;曾劲松等;《中华纸业》;20100123;第31卷(第2期);第84-87页 * |
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| CN102212979A (en) | 2011-10-12 |
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Granted publication date: 20131030 Termination date: 20190531 |