CN103307022A - Medium-consistency pulp pump - Google Patents
Medium-consistency pulp pump Download PDFInfo
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- CN103307022A CN103307022A CN2012100622867A CN201210062286A CN103307022A CN 103307022 A CN103307022 A CN 103307022A CN 2012100622867 A CN2012100622867 A CN 2012100622867A CN 201210062286 A CN201210062286 A CN 201210062286A CN 103307022 A CN103307022 A CN 103307022A
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- Prior art keywords
- pump
- impeller
- pulp
- fixed
- medium
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Links
- 239000000725 suspension Substances 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 210000002435 tendon Anatomy 0.000 claims description 11
- 238000005360 mashing Methods 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 12
- 239000012530 fluid Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 229940079593 drug Drugs 0.000 abstract 1
- 239000003814 drug Substances 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000004061 bleaching Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 16
- 239000002002 slurry Substances 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005243 fluidization Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004537 pulping Methods 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241001499740 Plantago alpina Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a medium-consistency pulp pump which is used for conveying medium-consistency pulp in industries of papermaking, chemical engineering and the like. A pump shaft is fixed in a suspension frame through a bearing box; a pump cover is sleeved on the pump shaft; the pump cover is fixed on the suspension frame; an impeller is fixed at one end of the pump shaft; a pump body is fixed on the suspension frame; a turbulence generating mechanism is arranged on the impeller; the impeller is provided with a plurality of uniformly distributed balance holes, and is provided with a back impeller; an auxiliary impeller is fixed on the pump shaft between the impeller and mechanical seal; the pump cover is provided with an exhaust port; pulp with concentration of 8-18% can be enabled to be fluidized through a fluid mechanics design and an internal structure; and the fluidized pulp is similar to liquid, so that the fluidized pulp can be smoothly conveyed by a centrifugal pump. A design lift of the medium-consistency pulp pump is higher, so that the demands that the pulp is conveyed by the high-consistency pump can be satisfied; the medium-consistency pulp pump has a good pulp fiber separation effect; the condition that air without pulp fiber is effectively removed out can be guaranteed; and meanwhile, the mixing efficiency of most chemical medicines and medium-consistency pulp can also be improved.
Description
Technical field
The present invention relates to pulp and paper industry middle concentration paper pulp cleaning and bleaching technical field, particularly a kind of middle concentration slurry conveying device.
Background technique
Two main pollution sources of pulp and paper industry are the pollution of the black liquor that produces of boiling and the pollution of bleaching effluent, and wherein the harmfulness polluted of bleaching effluent is polluted much larger than black digestion liquid, and toxicity is very big.The low dense chloride CEH bleaching of tradition needs to consume a large amount of chemical product such as chlorine, alkali and hypochlorite, produces the toxic wastewater that contains in a large number AOX, and one ton of CEH bleached pulp of every production can produce the toxic wastewater more than 100 cubes according to statistics.Along with the attention of people to environmental protection, improving and increasingly stringent of environmental regulation, enterprises in pulp and paper industry has begun progressively to adopt dense cleaning and bleaching technology during element-free chlorine (ECF) bleaching and totally chlorine free (TCF) bleach, reduce discharge capacity and the toxicity of waste water, reduce or eliminate paper-making effluent to the pollution of environment, carry out cleaner production.
Middle underflow material conveying technology is realized the main process of dense cleaning and bleaching technology in ECF bleaching and the TCF bleaching, and in dense cleaning and bleaching technology compare with the conventional bleaching technology, have that environmental pollution is little, yield is high, the bleached pulp retention of whiteness is good, the chemicals consumption is few, produce the series of advantages such as waste water is few and be widely adopted, and in the critical equipment of dense conveying technology be medium-consistency slurry pump system device.
Single Vane Medium Consistency Pump ZL95215788.8 of at present domestic production and turbulent type middle underflow pump CN88201317U transportation concentration all occur sending that slurry is unstable, pressure surge is large during greater than 10% middle underflow material, can't realize that ECF bleaching and TCF bleach in the conveying of underflow material in the dense cleaning and bleaching technical matters flow process; Utilize the positive displacement helical rotor pump carry in during the underflow material because paper pulp fiber is large with screw rod rubber bushing friction ractor, the screw rod lining is easy to damage and makes and carry unsuccessfully; Domestic introduction and external online in dense cleaning and bleaching pulping production line generally adopt Sulzer company with the middle underflow pump system with vertical quality-adjusting device of the middle underflow pump system of horizontal turbulence device or peace moral Ritz company, it is that its vacuum pump extract system directly is connected with pump or quality-adjusting device by pipeline, valve that there is a common shortcoming in these two kinds of middle underflow pump systems, slurry, water, vapour three-phase flow directly pass through vacuum pump, vacuum pump impeller is very fragile and degree of vacuum is descended or lost efficacy, in the impact the stable conveying of underflow material with in the safe operation of dense cleaning and bleaching pulping production line.Therefore, study underflow materials device in the stable conveying of a kind of energy, the safe operation of dense cleaning and bleaching pulping production line is extremely important in the assurance.
Because middle underflow material is a kind of three-phase fluid take stapling as solid matter, flow mechanism is complicated, the factor that affects flow mechanism is a lot, all can exert an influence to the mobile of slurry such as kind, concentration, flowing velocity, beating degree, temperature and the fiber configuration etc. of slurry.Concentration is that the middle underflow material of 8-18% has following characteristics: the one, and it is spherical etc. that the easy swollen of pulp fiber and flocculation are woven into, and makes this non-Newtonian plough fluid completely lose flowability, and easy plugging pulp pump; The 2nd, the air content in the slurry is up to 12-40.Therefore, directly use Ordinary Centrifugal Pumps (such as semi-open type or full-open type centrifugal pump, torque flow pump, spiral centrifugal pump etc.) can't carry out pumping.
Summary of the invention
The object of the invention be to provide a kind of new structure in dense mashing pump, adopt built-in air extractor, simplified depassing unit, adopt simultaneously Novel turbulence generating mechanism and Impeller Design to be integrated, mounting or dismounting are simple, concentration of slurry 0-18% can be carried with underflow material pumping technology in this, simplification of flowsheet can be realized less or non-polluting bleachoing technique, reduce equipment scale, reduce the loss of pulp fiber and chemicals, thus water saving, energy-conservation, environmental contamination reduction.
Technological scheme of the present invention is achieved in that
Dense mashing pump in a kind of, comprise the pump housing, impeller, sub-propeller, suspension and pump cover, described pump shaft is fixed in the described suspension by bearing housing, be set with described pump cover at described pump shaft, described pump cover is fixed on the described suspension, described impeller is fixed on an end of described pump shaft, the described pump housing is fixed on the described suspension, be provided with mechanical seal between described pump cover and the pump shaft, it is characterized in that: at described impeller the turbulent flow generating mechanism is set, be provided with several equally distributed equalizing orifices at described impeller, be provided with back impeller at described impeller, pump shaft between described impeller and mechanical seal is fixed with sub-propeller, is provided with exhaust port at described pump cover.
Described turbulent flow generating mechanism comprises two and above helical convex tendon.
Between described convex tendon, be provided with stiffening ring.
The end thickness gradual change of described convex tendon is thin, to form edge of a knife shape.
Be set with dividing plate at described impeller, described dividing plate is arranged between described impeller and the sub-propeller, and is fixed on the described pump cover, and the internal diameter at described dividing plate center forms air passageways between the two greater than the external diameter of impeller matrix.
The present invention compared with prior art has following advantage:
1. dense mashing pump in the turbulent type of novel designs, its fluid mechanics design and internal structure can make the slurry fluidization of concentration 8-18%, and fluidised slurry is similar to liquid, so can carry by centrifugal pump smoothly.This middle underflow pump rated lift is higher, can satisfy the needs of high dense pumping slurry; Improving efficient aspect the novel fluid mechanics the Hydraulic Design, energy consumption can reduce 20-30% in middle underflow material scope; Use speed adjustable range very wide, thereby more effectively saved the energy; Good pulp fiber separating effect can guarantee that the air that does not contain pulp fiber is got rid of effectively, has also improved the mixing efficiency of most of chemicals and middle underflow material simultaneously.
2. increase built-in air extractor, solved the problem because of the occupied ground that adopts the external vacuum pump, can significantly reduce equipment investment, reduced equipment operation energy consumption etc.
3. the tip designs of convex tendon becomes edge of a knife shape, can will have the long fibre in the pulp-inlet pipe to cut, and prevents from stopping up, and guarantees that transporting system continues safe handling for a long time.
4. between impeller and sub-propeller, be provided with dividing plate, further improved the separating effect of air.
Description of drawings
Fig. 1 is middle underflow material pump structure schematic diagram of the present invention
Fig. 2 is the structure enlarged diagram of impeller described in Fig. 1
1. pulp-inlet pipe 2. pump housings 3. turbulent flow generating mechanisms 4. impellers 5. equalizing orifices 6. dividing plates 7. sub-propellers 8. exhaust ports 9. pump covers 10. mechanical seals 11. suspensions 12. pump shafts 13. bearing housings 14. air passagewayss 15. convex tendons 16. terminal 17. stiffening rings, 18. back impellers.
Embodiment
From Fig. 1 and Fig. 2, can find out, dense mashing pump in a kind of, comprise the pump housing 2, impeller 4, sub-propeller 7, suspension 11 and pump cover 9, described pump shaft 12 is fixed in the described suspension 11 by bearing housing 13, be set with described pump cover 9 at described pump shaft 12, described pump cover 9 is fixed on the described suspension 11, described impeller 4 is fixed on an end of described pump shaft 12, the described pump housing 2 is fixed on the described suspension 11, be provided with mechanical seal 10 between described pump cover 9 and the pump shaft 12, it is characterized in that: at described impeller 4 turbulent flow generating mechanism 3 is set, be provided with several equally distributed equalizing orifices 5 at described impeller 4, be provided with back impeller 18 at described impeller 4, the pump shaft 12 between described impeller 4 and mechanical seal 10 is fixed with sub-propeller 7, is provided with exhaust port 8 at described pump cover 9.Described turbulent flow generating mechanism 3 comprises two and above helical convex tendon 15, is provided with stiffening ring 17 15 of described convex tendons.End 16 gradient thickness of described convex tendon 15 are thin, to form edge of a knife shape.Be set with dividing plate 6 at described impeller 4, described dividing plate 6 is arranged between described impeller 4 and the sub-propeller 7, and is fixed on the described pump cover 9, and the internal diameter at described dividing plate 6 centers forms air passageways 14 between the two greater than the external diameter of impeller 4 matrixes.
Working principle: advance to starch under the static pressure certain, middle underflow material is by strong shearing and the high speed impulse action of pulp-inlet pipe 1 through turbulent flow generating mechanism 3, the pulp fiber network is diffused into the approximate continuous medium that is comprised of countless single fibers or various little micelle, make middle underflow material be in complete turbulence and fluidization, the air that wherein produces in the fluidization process is split into low-pressure cavity by turbulent flow generating mechanism 3, and on impeller balance hole 5, sub-propeller 7 and pump cover 9 exhaust port 8 be expelled to gas gathering system; The fraction pulp fiber of carrying secretly in the air then by impeller balance hole 5 and back blade, is fed through discharge gate under centrifugal action; Fluidised middle underflow material converts pressure energy to by kinetic energy, and is pumped to exhaust end by half-opened impeller under the effect of centrifugal force, finish smoothly middle underflow material pumping work.
Above demonstration and described basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. dense mashing pump in, comprise pump housing ⑵, impeller ⑷, sub-propeller ⑺, suspension 11 and pump cover ⑼, described pump shaft ⑿ is fixed among the described suspension ⑾ by bearing housing ⒀, be set with described pump cover ⑼ at described pump shaft ⑿, described pump cover ⑼ is fixed on the described suspension ⑾, described impeller ⑷ is fixed on the end of described pump shaft ⑿, described pump housing ⑵ is fixed on the described suspension ⑾, be provided with mechanical seal ⑽ between described pump cover ⑼ and the pump shaft ⑿, it is characterized in that: at described impeller ⑷ turbulent flow generating mechanism ⑶ is set, be provided with several equally distributed equalizing orifice ⑸ at described impeller ⑷, be provided with back impeller ⒅ at described impeller ⑷, pump shaft ⑿ between described impeller ⑷ and mechanical seal ⑽ is fixed with sub-propeller ⑺, is provided with exhaust port ⑻ at described pump cover ⑼.
2. dense mashing pump in according to claim 1, it is characterized in that: described turbulent flow generating mechanism ⑶ comprise two and above helical convex tendon ⒂ according to claim 1 a kind of in dense mashing pump, it is characterized in that: between described convex tendon ⒂, be provided with stiffening ring ⒄.
3. dense mashing pump in according to claim 1, it is characterized in that: the terminal ⒃ gradient thickness of described convex tendon ⒂ is thin, to form edge of a knife shape.
4. be set with dividing plate ⑹ at described impeller ⑷, described dividing plate ⑹ is arranged between described impeller ⑷ and the sub-propeller ⑺, and is fixed on the described pump cover ⑼, and the internal diameter at described dividing plate ⑹ center forms air passageways ⒁ between the two greater than the external diameter of impeller ⑷ matrix.
5. dense mashing pump in according to claim 1, it is characterized in that: be set with dividing plate ⑹ at described impeller ⑷, described dividing plate ⑹ is arranged between described impeller ⑷ and the sub-propeller ⑺, and be fixed on the described pump cover ⑼, the internal diameter at described dividing plate ⑹ center forms air passageways ⒁ between the two greater than the external diameter of impeller ⑷ matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100622867A CN103307022A (en) | 2012-03-12 | 2012-03-12 | Medium-consistency pulp pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100622867A CN103307022A (en) | 2012-03-12 | 2012-03-12 | Medium-consistency pulp pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103307022A true CN103307022A (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100622867A Pending CN103307022A (en) | 2012-03-12 | 2012-03-12 | Medium-consistency pulp pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103307022A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615411A (en) * | 2013-12-05 | 2014-03-05 | 江苏飞跃机泵集团有限公司 | Flow guiding generator of medium concentration pulp pump |
| CN109505181A (en) * | 2018-12-03 | 2019-03-22 | 轻工业杭州机电设计研究院有限公司 | Tower top discharger for middle concentration paper pulp ozone bleaching reactor |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88201317U (en) * | 1988-02-12 | 1988-11-30 | 中国轻工业机械总公司天津轻工业机械厂 | Turbulent type middle underflow pump |
| WO1992011458A1 (en) * | 1990-12-19 | 1992-07-09 | Kamyr Aktiebolag | A suspension pump with built-in vacuum pump |
| EP0368530B1 (en) * | 1988-11-08 | 1993-07-14 | A. Ahlstrom Corporation | Fluidizing centrifugal pump or impeller for such a pump |
| CN1192800A (en) * | 1995-06-05 | 1998-09-09 | A·阿尔斯特罗姆公司 | Method for controlling function of centrifugal pump and vacuum pump combination, and gas separating centrifugal pump |
| CN1196101A (en) * | 1995-09-07 | 1998-10-14 | 卡瓦纳碎浆处理公司 | Pump for fibrous pulp suspension with means for separating gas from suspension |
| CN1335916A (en) * | 1998-12-30 | 2002-02-13 | 苏舍泵有限公司 | Method and apparatus for pumping a material and a rotor for use in connection therewith |
| CN2784635Y (en) * | 2005-04-15 | 2006-05-31 | 余滔 | Low pulse paper pulp pump |
| CN201598531U (en) * | 2009-10-30 | 2010-10-06 | 杭州萧山美特轻工机械有限公司 | Impeller of turbulence generator with variable helix angle |
| CN201836059U (en) * | 2010-06-01 | 2011-05-18 | 杭州萧山美特轻工机械有限公司 | Turbulent medium-consistency stuff pump with variable helical angles |
| CN202971205U (en) * | 2012-08-06 | 2013-06-05 | 江苏新跃泵业制造有限公司 | Medium-consistency slurry pump |
-
2012
- 2012-03-12 CN CN2012100622867A patent/CN103307022A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88201317U (en) * | 1988-02-12 | 1988-11-30 | 中国轻工业机械总公司天津轻工业机械厂 | Turbulent type middle underflow pump |
| EP0368530B1 (en) * | 1988-11-08 | 1993-07-14 | A. Ahlstrom Corporation | Fluidizing centrifugal pump or impeller for such a pump |
| WO1992011458A1 (en) * | 1990-12-19 | 1992-07-09 | Kamyr Aktiebolag | A suspension pump with built-in vacuum pump |
| CN1192800A (en) * | 1995-06-05 | 1998-09-09 | A·阿尔斯特罗姆公司 | Method for controlling function of centrifugal pump and vacuum pump combination, and gas separating centrifugal pump |
| CN1196101A (en) * | 1995-09-07 | 1998-10-14 | 卡瓦纳碎浆处理公司 | Pump for fibrous pulp suspension with means for separating gas from suspension |
| CN1335916A (en) * | 1998-12-30 | 2002-02-13 | 苏舍泵有限公司 | Method and apparatus for pumping a material and a rotor for use in connection therewith |
| CN2784635Y (en) * | 2005-04-15 | 2006-05-31 | 余滔 | Low pulse paper pulp pump |
| CN201598531U (en) * | 2009-10-30 | 2010-10-06 | 杭州萧山美特轻工机械有限公司 | Impeller of turbulence generator with variable helix angle |
| CN201836059U (en) * | 2010-06-01 | 2011-05-18 | 杭州萧山美特轻工机械有限公司 | Turbulent medium-consistency stuff pump with variable helical angles |
| CN202971205U (en) * | 2012-08-06 | 2013-06-05 | 江苏新跃泵业制造有限公司 | Medium-consistency slurry pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615411A (en) * | 2013-12-05 | 2014-03-05 | 江苏飞跃机泵集团有限公司 | Flow guiding generator of medium concentration pulp pump |
| CN109505181A (en) * | 2018-12-03 | 2019-03-22 | 轻工业杭州机电设计研究院有限公司 | Tower top discharger for middle concentration paper pulp ozone bleaching reactor |
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Application publication date: 20130918 |