CN103101767B - Enclosed transportation method of powder materials capable of absorbing moisture easily - Google Patents
Enclosed transportation method of powder materials capable of absorbing moisture easily Download PDFInfo
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- CN103101767B CN103101767B CN201310079718.XA CN201310079718A CN103101767B CN 103101767 B CN103101767 B CN 103101767B CN 201310079718 A CN201310079718 A CN 201310079718A CN 103101767 B CN103101767 B CN 103101767B
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Abstract
The invention discloses an enclosed transportation method of powder materials capable of absorbing moisture easily. The enclosed transportation method of powder materials capable of absorbing moisture easily comprises the following steps of feeding materials in a material bin, weighing, absorbing materials at vacuum negative pressure, matching liquids and the like. The enclosed transportation method of the powder materials capable of absorbing moisture easily is characterized by also comprising a circulating feeding technology, wherein the circulating feeding technology comprises the steps of extracting powder materials at the bottom of a material bin periodically, scattering the powder materials from the top of the material bin into the material bin, so that the powder materials in the material bin form a motion cycle state. According to the invention, in order to prevent materials which easily absorb moisture from caking, a compressed air blowing method with poor effects in the prior art is abandoned, a technology of cycle feeding by combining with hot air blowing is adopted, and by adopting the method provided by the invention, the problem that the normal powder material conveying is influenced by caking due to moisture absorption is solved fundamentally; and smooth conveying of moisture absorption powder materials and efficient production are ensured, and meanwhile, defect of powder material pollution caused by treating caked powder materials is solved.
Description
Technical field
The present invention relates to a kind of material conveying method, be particularly applicable to the airtight carrying method of easy moisture absorption powder of the industry such as pharmacy, food, belong to medical art.
Background technology
In industries such as pharmacy, food, chemical industry, the conveying of powder material is an important technological process, and contaminated when carrying for preventing powder material, carrying method comparatively advanced is at present negative pressure closed conveying.The equipment that negative pressure closed conveying uses comprises feed bin, gravimetric tank, vacuum pump, vacuum intake device, transfer line and vacuum line etc.Carry for the medicinal powder of pharmaceutical industry, its technological process is: the medicinal powder rendered in feed bin delivers into gravimetric tank by bin bottom, be sucked through transfer line after entering the medicinal powder correct amount of gravimetric tank and enter vacuum intake device, then render to material-compound tank by vacuum intake device and carry out drug solution preparing.This process, can complete medicinal powder and measure conveying and process for preparation in confined conditions, effectively prevent cross pollution and avoid dust on the impact of clean area environment, and production efficiency be high.But when carried powder is easy moisture absorption powder material, this delivery technology then encounters and causes carrying the problem that cannot normally carry out because of powder material moisture absorption caking.As: during conveying sodium chloride powder; the very easily hygroscopic properties of sodium chloride; the sodium chloride powder be gathered in feed bin is lumpd because of the moisture absorbed in environment, and caking makes the flowing power of sodium chloride powder be deteriorated, and carries not smooth; clogged up with material can be caused when luming serious; normally cannot be exported by bin bottom, can only shut down and carry out artificial treatment, like this; not only have a strong impact on the normal rhythm of production, simultaneously and likely cause material to be exposed to cause outside equipment the pollution to sodium chloride powder.In order to solve powder material moisture absorption agglomeration problems, prior art have employed and in feed bin, passes into compressed-air actuated method prevent material from luming, but this method can only improve the caking situation of feed bin endosexine powder material, and cannot be fundamentally improved the caking situation being in feed bin bottom powder.
Summary of the invention
Problem to be solved by this invention is: provide one can effectively prevent powder material from luming, avoid the contaminated feedstock because of process caking, can raise labour efficiency simultaneously, reduce the airtight carrying method of easy moisture absorption powder of labour intensity.
Problem alleged by the present invention is solved by following technical scheme:
A kind of easily airtight carrying method of moisture absorption powder, it comprises that feed bin feeds intake, weighs, negative pressure of vacuum suction and process for preparation, wherein, feed bin feeds intake and powder is rendered to feed bin, powder in feed bin is inhaled into vacuum intake device after gravimetric tank is weighed, render to material-compound tank by vacuum intake device again to prepare, special feature is: described method also comprises circulation material loading technique, described circulation material loading technique is periodically extracted out by the powder being positioned at bin bottom, trickle down in feed bin by feed bin top again, impel powder in feed bin, form motion cycle state.
The airtight carrying method of above-mentioned easy moisture absorption powder, described method also comprises heat blow technique, and described heat blow technique is by continual for hot blast feeding feed bin, and the flow direction of hot blast for advance under feed bin top disc rotation direction, and hot blast air output is 250-300m3/h; Keep the temperature 30-40 DEG C in feed bin, the humidity in feed bin is less than 30%.
The airtight carrying method of above-mentioned easy moisture absorption powder, described circulation material loading technique is implemented by circulation feeding device, and described circulation feeding device comprises circulation loader, circulation material loading pipeline and vacuum generator; Circulation loader is positioned at the top of feed bin, circulation loader bottom arranges the conveying mouth being communicated with feed bin, described circulation material loading pipeline upper end is communicated with circulation loader, circulation material loading pipeline lower end is communicated with the bottom of feed bin, described vacuum generator is positioned at circulation loader top, and vacuum generator connects circulation loader.
The airtight carrying method of above-mentioned easy moisture absorption powder, described heat blow technique is implemented by hot air apparatus, hot air apparatus comprises the blower fan, temperature booster and the blast pipe that are communicated with successively, blast pipe passes in feed bin by feed bin top, the air outlet of blast pipe is along the tangential setting of feed bin inwall, blast pipe relative level method tilts, and its inclination alpha is 10-20 °.
The airtight carrying method of above-mentioned easy moisture absorption powder, the conveying mouth of described circulation loader and blast pipe are separately positioned on the both sides at feed bin top.
The airtight carrying method of above-mentioned easy moisture absorption powder, each circulation material loading cycle of described circulation loader is three phases: vacuumizing phase 4-5 second, suction stage 35-40 second, discharging phase 8-10 second, in suction step cycle loader, condition of negative pressure is-55 kpa to-60kpa, and each circulation material loading cycle is the 2-4% of inventory weight in feed bin by the powder drawn in feed bin.
Above-mentioned easy moisture absorption powder material carrying method, the powder sending into feed bin need carry out pulverization process, and pulverization process is implemented by the crusher being arranged on dog-house place, and the discharging opening of crusher is communicated with the dog-house at feed bin top.
Above-mentioned easy moisture absorption powder material carrying method, described circulation material loading pipeline is software pipeline, and circulation material loading pipeline is provided with material loading control cock, and the conveying mouth place of described circulation loader is provided with conveying control cock.
Above-mentioned easy moisture absorption powder material carrying method, described vacuum intake device is positioned at material-compound tank top, and vacuum intake device connects gravimetric tank through conveying pipeline, and vacuum intake device connects vacuum pump through vacuum line, be provided with diaphragm in vacuum intake device, diaphragm both sides arrange support orifice plate; Vacuum line is provided with steam separator.
Above-mentioned easy moisture absorption powder material carrying method, in described vacuum intake device, suction condition of negative pressure is-55 kpa to-60kpa, utilizes pressurized air to carry out blowback to diaphragm after each suction cycle completes, blowback pressure 0.15Mpa-0.25 Mpa, blowback time 3-4 second.
The present invention is directed to and solve easy moisture absorption powder carry process agglomeration problems and provide a kind of easily airtight carrying method of moisture absorption powder.Described method abandons the compressed-air blows method of poor effect in prior art, adopt circulation material loading associating heat blow technique, that is: the powder at position of the most easily being lumpd by bin bottom periodically sucks circulation loader, render in feed bin by circulation loader again, the cyclic process pushing up and put taken out by powder in feed bin the end of by, impel it constantly to move, effectively inhibit the generation of caking; By being arranged on the hot air apparatus at feed bin top, by continual for hot blast feeding feed bin, in raising feed bin while temperature, reduction humidity, the powder that circulation is thrown in can be dispelled drying by the thermal current produced, and plays the effect preventing from luming further.Adopt the inventive method, fundamentally solve the moisture absorption agglomeration problems of easy moisture absorption powder, while the smooth and easy conveying of the easy moisture absorption powder of guarantee, High-efficient Production, avoid the drawback because process caking causes powder to pollute, improve efficiency simultaneously, reduce labour intensity.
Accompanying drawing explanation
Fig. 1 be implement the inventive method use the schematic diagram of equipment;
Fig. 2 is circulation feeding device schematic diagram;
Fig. 3 is blast pipe distribution schematic diagram in feed bin;
Fig. 4 is vacuum intake device schematic diagram;
Fig. 5 is diaphragm schematic diagram;
Fig. 6 is orifice plate schematic diagram.
In figure, each label implication inventory is as follows: 1, vacuum pump; 2, filter; 3, vacuum line; 4, steam separator; 4-1, discharge port, 5, vacuum intake device; 6, material-compound tank; 7, conveying pipeline; 8, gravimetric tank; 8-1, Weighing mechanism; 9, motor is shaken; 10, circulation material loading pipeline; 11, feed bin; 12, blower fan; 13, temperature booster; 14, blast pipe; 15, dog-house; 16, vacuum generator; 17, filter bag; 18, circulation loader; 19, material loading control cock; 20, conveying control cock; 21, conveying mouth; 22, orifice plate is supported; 23, diaphragm; 24, vacuum intake device drain hole; 25. crushers.
Detailed description of the invention
The inventive method is applicable to the closed conveying of the industries such as pharmacy, food, chemical industry for easy moisture absorption powder, and present embodiment is for the closed conveying of the easy moisture absorption powder (as sodium chloride) of pharmaceutical industry.
The inventive method comprises the technological processes such as feed bin feeds intake, weighs, negative pressure of vacuum suction, preparation.Referring to Fig. 1, feed bin 11 top is provided with dog-house 15, and dog-house 15 place is provided with crusher 25, and the discharging opening of crusher is communicated with the dog-house of feed bin.For avoiding the powder lumpd to enter feed bin, need to carry out break process to powder, the powder particle size through crusher in crushing process is no more than 2 centimetres, is dropped into through broken powder in feed bin by dog-house again.Gravimetric tank 8 is positioned at feed bin bottom, and gravimetric tank is provided with Weighing mechanism 8-1, and Weighing mechanism is by PLC control operation.Powder in feed bin is delivered into gravimetric tank and weighs under the booster action of bin bottom concussion motor 9.Vacuum intake device 5 is positioned on material-compound tank 6, is communicated with material-compound tank, vacuum intake device is communicated with vacuum pump 1 through vacuum line 3, powder in gravimetric tank sucks in vacuum intake device through conveying pipeline 7 by vacuum intake device under suction function, then powder is rendered in material-compound tank 6 by vacuum intake device again, exports after material-compound tank is configured to solution.Equipment shown in Fig. 1 is provided with a gravimetric tank, a material-compound tank.In actual production, according to the needs of powder carry, multiple gravimetric tank can be set in feed bin bottom, be controlled the weighing operation of each gravimetric tank by control mechanism; Arrange multiple material-compound tank simultaneously, each material-compound tank all arranges vacuum intake device, each vacuum intake device is communicated with vacuum pump through vacuum line; Need to select the corresponding material-compound tank of a gravimetric tank according to batching, or the mode of operation of a corresponding multiple material-compound tank of gravimetric tank, this flexible configuration mode can improve capacity utilization rate greatly, thus enhances productivity.
Still referring to Fig. 1, feed bin 11 top is cylindrical, and bottom is cone shape, and integral structure is thin and tall.Very easily lump under the effect of top powder gravity after being in the powder moisture absorption of thin and tall feed bin bottom, after caking, be gathered in the cone place of feed bin bottom, make powder material cannot enter gravimetric tank smoothly.For this reason, the inventive method adopts circulation material loading associating heat blow technique to solve easy moisture absorption powder agglomeration problems.Described circulation material loading technological process is periodically extracted out by the powder being positioned at bin bottom, then trickle down in feed bin by feed bin top, impels powder in feed bin, form motion cycle state; Described heat blow technique is by continual for hot blast feeding feed bin, and the flow direction of hot blast for advance under feed bin top disc rotation direction, and hot blast air output is 250-300m3/h; Under hot wind action, keep the temperature 30-40 DEG C in feed bin, the humidity in feed bin is less than 30%.
Described circulation material loading technique is implemented by means of circulation feeding device.Referring to Fig. 1, Fig. 2, circulation feeding device comprises circulation loader 18, circulation material loading pipeline 10 and vacuum generator 16.Circulation loader 18 is positioned at the top of feed bin 11, and circulation loader bottom arranges the conveying mouth 21 being communicated with feed bin, and circulation material loading pipeline 10 upper end is communicated with circulation loader, and the cone bottom that circulation material loading pipeline lower end and feed bin 11 the most easily lump is communicated with.Vacuum generator 16 is positioned at circulation loader top, is communicated with circulation loader.Circulation material loading pipeline 10 is provided with material loading control cock 19, and conveying mouth 21 place of circulation loader is provided with conveying control cock 20.For avoiding circulation material loading pipeline symmetry heavily to have an impact, circulation material loading pipeline 10 adopts software pipeline.Each cycle of operations of circulation feeding device is three phases: 1, vacuumizing phase: conveying control cock 20 is closed, and material loading control cock 19 is closed, and vacuum generator 16 starts, and introduces vacuum by vacuum generator 16, makes circulation loader be in negative pressure state; 2, in the material loading stage: vacuum generator 16 cuts out, conveying control cock 20 is closed, and material loading control cock 19 is opened, and under the effect of material loading stage negative pressure in circulation loader, from feed bin bottom, part powder is sucked in circulation loader through circulation material loading pipeline 10; 3, in the conveying stage: vacuum generator 16 cuts out, conveying control cock 20 is opened, and material loading control cock 19 is closed, and the powder material in circulation loader 18 enters in feed bin through conveying mouth 21.What above-mentioned circulation was carried out vacuumizes, material loading, the conveying stage, impel the powder material in feed bin constantly to move, effectively suppress caking, fundamentally to improve in feed bin, the caking of particularly feed bin bottom powder material.The startup of vacuum generator 16, closedown, and material loading control cock 19, conveying control cock 20 are opened, are closed and can be controlled or Non-follow control by control circuit.The introducing of circulation loader 18 vacuum, also by the mode of external pipeline, directly can introduce vacuum by vacuum pump.The filter bag 17 filtering and retain powder material is provided with in circulation loader 18.Consider the caking characteristics of easy moisture absorption powder, the retaining amount of powder in feed bin is too much unsuitable, can be controlled the retaining amount in feed bin by control inventory.In circulation feeding device cycle of operations, each stage required time is: vacuumizing phase 4-5 second, suction stage 35-40 second, discharging phase 8-10 second, in suction step cycle loader, condition of negative pressure is-55 kpa to-60kpa, in each circulation material loading cycle, the 2-4% being retaining amount in feed bin by the powder drawn in feed bin is advisable (can pass through adjustment suction time and Stress control suction amount).According to above-mentioned technological condition, be equivalent to about 20-40 minute and make material stock in feed bin all circulation material loading is once.
Described heat blow technique is implemented by means of hot air apparatus.Referring to Fig. 1, Fig. 3, described hot air apparatus comprises the blower fan 12, temperature booster 13 and the blast pipe 14 that are communicated with successively, blast pipe 14 tangentially passes in feed bin by feed bin 11 top along feed bin inwall, blast pipe 14 relative level method is obliquely installed, its inclination alpha is 10-20 °, and this structure can make hot blast enter feed bin hub disk and screw off row.Hot air apparatus continues to send into hot blast in feed bin, can improve the temperature in feed bin, reduce humidity, prevent powder material from luming further.Particularly blast pipe 14 and the conveying mouth 21 of circulation loader 18 lay respectively at the both sides at feed bin top, mutually corresponding orientation, make the hot-air flow of feeding feed bin spiral meet with the powder inputting feed bin through conveying mouth 21 in decline process time, powder material is dispelled whereabouts, and drying functions is played to powder material.
Referring to Fig. 4-6, be provided with diaphragm 23 in vacuum intake device 5, diaphragm is used for divided gas flow in vacuum intake process and retains powder.Block for avoiding diaphragm, need to carry out blowback to diaphragm, prolonged and repeated pressure-vaccum makes diaphragm repeated deformation under the effect of alternating force, be easy to cause diaphragm to bend and premature breakdown, once when diaphragm damages, moisture and powder can be sucked in vacuum pump chamber by vacuum line because leaking material by mistake, causing the serious consequence of Vacuum pump rotary vane damage, pump oil pollution.For preventing diaphragm bending in aspiration procedure repeatedly from damaging, the present invention is provided with in diaphragm 23 both sides and supports orifice plate 22, supports uniform eyelet on orifice plate.Diaphragm is clamped in centre by the support orifice plate being positioned at both sides by this structure, make diaphragm can not produce bending with air-flow alternation and damage, and eyelet uniform on orifice plate can not produce obstruction to the flowing of vacuum pneumatic.Be advisable with 4mm-6mm in the aperture supported on orifice plate.In vacuum intake device, condition of negative pressure is-55 kpa to-60kpa, and the time in each suction cycle is 50-58s, wherein suction 35-40 second, vacuumizes 5-8 second, throws in material 10s in material-compound tank.The powder rendered in material-compound tank is configured to solution as required, then through sanitary pump, liquid Pipeline transport.After each suction end cycle, pressurized air is utilized to carry out blowback to diaphragm, blowback pressure 0.15Mpa-0.25 Mpa, blowback time 3-4 second.
Still referring to Fig. 1, the present invention is also provided with steam separator 4 and filter 2 on vacuum line 3, and steam separator 4, for separating of the moisture in vacuum line, prevents moisture from entering in vacuum pump, steam separator bottom is provided with discharge port 4-1, can regularly from discharge port internal drainage.Filter 2, for separating of the object in vacuum line, plays a protective role to vacuum pump.
Claims (9)
1. an easy moisture absorption powder material delivery system, it comprises feed bin (11), gravimetric tank (8), vacuum pump (1), vacuum intake device (5), material-compound tank (6), conveying pipeline (7) and vacuum line (3), described gravimetric tank is positioned at feed bin bottom, gravimetric tank connects vacuum intake device through conveying pipeline, described vacuum intake device is positioned at material-compound tank top, vacuum intake device connects vacuum pump through vacuum line (3), it is characterized in that: described system is provided with circulation feeding device, circulation feeding device comprises circulation loader (18), circulation material loading pipeline (10) and vacuum generator (16), circulation loader is positioned at the top of feed bin (11), circulation loader bottom arranges the conveying mouth (21) being communicated with feed bin, described circulation material loading pipeline (10) upper end is communicated with circulation loader, circulation material loading pipeline lower end is communicated with the bottom of feed bin (11), described vacuum generator (16) connects circulation loader,
Described system is provided with hot air apparatus, and hot air apparatus comprises the blower fan (12), temperature booster (13) and the blast pipe (14) that are communicated with successively, and blast pipe is passed in feed bin by feed bin (11) top.
2. easy moisture absorption powder material delivery system according to claim 1, is characterized in that: described feed bin (11) is provided with crusher (25), and the discharging opening of crusher is communicated with the dog-house (15) being arranged on feed bin top.
3. easy moisture absorption powder material delivery system according to claim 2, is characterized in that: the air outlet of described blast pipe (14) is along the tangential setting of feed bin inwall.
4. easy moisture absorption powder material delivery system according to claim 3, it is characterized in that: described blast pipe (14) relative level method is obliquely installed, its inclination alpha is 10-20 °.
5. easy moisture absorption powder material delivery system according to claim 4, is characterized in that: described circulation loader (18) and blast pipe (14) are separately positioned on the both sides at feed bin top.
6. easy moisture absorption powder material delivery system according to claim 5, is characterized in that: be provided with diaphragm (23) in described vacuum intake device (5), and diaphragm both sides arrange and support orifice plate (22).
7. easy moisture absorption powder material delivery system according to claim 6, it is characterized in that: described vacuum line is provided with steam separator (4), steam separator bottom is provided with discharge port (4-1).
8. easy moisture absorption powder material delivery system according to claim 7, it is characterized in that: described circulation material loading pipeline (10) is provided with material loading control cock (19), conveying mouth (21) place of described circulation loader is provided with conveying control cock (20).
9. easy moisture absorption powder material delivery system according to claim 8, is characterized in that: described circulation material loading pipeline (10) is software pipeline.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104495390B (en) * | 2014-12-10 | 2016-08-24 | 大唐彬长发电有限责任公司 | A kind of delivery pump throttle orifice electrical heat tracing system |
| CN106422827A (en) * | 2016-08-18 | 2017-02-22 | 浙江铭叶磁材科技有限公司 | Powder preparation device and preparation method for metal magnetic powder cores |
| CN106802108A (en) * | 2017-02-21 | 2017-06-06 | 安徽五瑞洁能科技有限公司 | One kind can memory-type novel two-stage vacuum feeding system |
| CN107226354B (en) * | 2017-07-14 | 2023-04-14 | 湖北民族学院 | Weighing and feeding equipment for salting-out process and using method thereof |
| CN108328363A (en) * | 2018-02-09 | 2018-07-27 | 江苏正军装饰材料有限公司 | A kind of coating extrusion device feed mechanism |
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| CN1493512A (en) * | 2003-09-01 | 2004-05-05 | 上海博隆粉体工程有限公司 | Solid particle pneumatic transfer and blending device |
| CN201545512U (en) * | 2009-06-10 | 2010-08-11 | 陈毅 | Limestone continuous conveying system |
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| US4490077A (en) * | 1981-07-28 | 1984-12-25 | Nippon Kokan Kabushiki Kaisha | Apparatus for continuously measuring flow rate of fine material flowing through transport pipe |
| US4593727A (en) * | 1981-10-19 | 1986-06-10 | Paul Wurth S.A. | Apparatus and method for controlling the contents and the filling of a distribution tank for pulverized materials |
| CN1493512A (en) * | 2003-09-01 | 2004-05-05 | 上海博隆粉体工程有限公司 | Solid particle pneumatic transfer and blending device |
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