CN105588418A - Device and method for preventing wall adhesion of spray drying tower - Google Patents
Device and method for preventing wall adhesion of spray drying tower Download PDFInfo
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- CN105588418A CN105588418A CN201410563599.XA CN201410563599A CN105588418A CN 105588418 A CN105588418 A CN 105588418A CN 201410563599 A CN201410563599 A CN 201410563599A CN 105588418 A CN105588418 A CN 105588418A
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Abstract
The invention provides a mechanism and a method for preventing wall adhesion of a spray drying tower. The mechanism comprises an outer cylinder and a suction port, wherein the outer cylinder is provided with an air inlet and an air outlet; the suction port is formed in the outer cylinder and is used for providing an adhesion preventing material to the inside of the outer cylinder; and air current flowing in the outer cylinder can carry the adhesion preventing material to flow out through the air outlet. The invention also provides a device for preventing the wall adhesion of the spray drying tower. The device comprises the mechanism and an air current distributor connected with the air outlet of the outer cylinder. The invention further provides the method for preventing the wall adhesion of the spray drying tower. According to the method, air current and the adhesion preventing material are fed into a spray drying area by the device.
Description
Technical field
The present invention relates to chemical industry equipment field, relate more specifically to material dispersion apparatus field.
Background technology
Though the product after the sticky spray-dried preparation of viscous material be graininess but not smooth, can produce sticky wall and conglomeration, then causes stifled tower, as cleared up and cannot maintain normal production not in time. For this class material, in the dry industry of spraying, conventionally adopt intermittently operated, manually clean. The production efficiency of device is not high, and operating personnel's working strength is large.
At present, industrial common employing redrying or the method for carrying out secondary blending, make product reach smooth, meets the final requirement of finished product. Redrying is with higher temperature (higher than temperature in drying tower), the moisture content of product further to be reduced, and it is applicable to non-heat sensitive material; Secondary blending is to utilize blending equipment to add interleaving agent, utilizes the performance of interleaving agent to make not conglomeration of final products, reaches smooth effect, and it is applicable to thermal sensitivity and non-heat sensitive material. Above two kinds of methods all can not solve the problem of the sticky wall of spray drying tower body inwall, and spray-drying installation can not be produced continuously.
In addition, industrial have a method of utilizing brattice to prevent the sticky wall of spray drying tower, forms one deck gas wall wind on drying tower inwall, only glues viscous material contact the effect that reaches antiseized wall with inwall by gas wall windage. There are two problems in it, and the one, gas wall wind can be upset the hot-air flow that hot-air distributor distributes, and affects the uniformity of dry products moisture content, reduces dry products quality; The 2nd, gas wall wind can not form brattice at tower top, and sticky viscous material will be hung top and assembles, and circumferentially can not form a complete confined space at tower body, can be leaky, and sticky viscous material can be assembled at leak place, and this all can cause the drying tower cannot normal and continuous operation. So it can not solve sticky viscous material in the not technical problem of sticky wall of spray drying tower inwall.
Based on the problems referred to above, need badly and develop a kind of devices and methods therefor that prevents the sticky wall of spray drying tower.
Summary of the invention
The object of the invention is granule materials to be distributed in drying tower by the even action of air-flow, to solve the problem of the sticky wall of sticky viscous material.
Therefore, the invention provides a kind of mechanism that prevents the sticky wall of spray drying tower, it comprises: the urceolus with air inlet and gas outlet; And be located at the pump orifice on urceolus, for antiseized material is provided in urceolus; Wherein, the air-flow flowing through in urceolus can carry antiseized material and flow out through described gas outlet.
The drying tower that the present invention is sent to antiseized material spraying by the effect of air-flow mixes with sticky viscous material, not conglomeration of dried finished product like this, and reach smooth effect, thereby the method for having avoided redrying or secondary blending makes product reach smooth object, simplify processing step, saved cost. Meanwhile, by mechanism of the present invention, also solved the problem of the sticky wall that redrying or secondary blending bring, thereby realized spray-drying installation quantity-produced needs.
In addition, utilize mechanism of the present invention, no longer need on drying tower inwall, form one deck gas wall wind, avoided like this gas wall wind to upset the air-flow that air-flow distributor distributes, thereby increased the uniformity of dry products moisture content, improved dry products quality; And, gas wall wind of the prior art can not form brattice at tower top, sticky viscous material will be hung top and assemble, circumferentially can not form a complete confined space at tower body, can be leaky, sticky viscous material can be assembled at leak place, this all can cause the drying tower cannot normal and continuous operation, and utilize mechanism of the present invention, in the situation that not needing gas wall wind, can cannot not reach stickyly the effect of wall yet.
Therefore, the present invention has not only simplified processing step, has saved cost, and has solved sticky viscous material in the not technical problem of sticky wall of spray drying tower inwall.
In a concrete embodiment, also comprise the inner core being arranged in described urceolus, the longitudinal axis of described inner core is parallel to the longitudinal axis of described urceolus, and the two ends of described inner core are respectively inlet end and outlet side; Wherein, described air-flow flows through in described inner core. Parallel in parallel not mathematical meaning described in the present invention, but allow to exist certain angle, for example, angle between the longitudinal axis of inner core and the longitudinal axis of urceolus is that 0 degree is to 30 degree. But preferably the longitudinal axis of inner core and the longitudinal axis of urceolus overlap substantially, can reach like this effect that reduces gas-flow resistance. The present invention arranges by the inner core of air-flow, and when having the air-flow of certain flow rate, to enter the flow velocity that inner core enters urceolus compared with it large. And according to " Bernoulli effect ", the local pressure that flow velocity is large is little, the local pressure that flow velocity is little is large, therefore by the effect of inner core, can make antiseized material reach better dispersion effect.
In a concrete embodiment, described inner core extends across described pump orifice. On pump orifice is arranged at the urceolus at rear of inner core outlet side (with air flow stream in the opposite direction) time, the region of the urceolus of air-flow from the outlet side of inner core enters into the outlet side of inner core, the local pressure that flow velocity is large is little, and the local pressure that flow velocity is little is large. That is to say, under the effect of air-flow, the weak region of air-flow in described urceolus will form " negative pressuren zone ", and in the time that inner core extends across described pump orifice, antiseized material by chance falls into " negative pressuren zone " in urceolus from pump orifice, under the suction of negative pressure, antiseized material is sent the gas outlet of this mechanism with air-flow. Wherein, the meaning of negative pressure is that air pressure is lower than an atmospheric pressure.
In a concrete embodiment, described inner core comprises the first nozzle of the outlet side that is arranged on described inner core. Its objective is the speed that increases air-flow, air-flow velocity is uprised by low, thereby in the time that air-flow flows out the spout of the first nozzle, can increase the pressure of " low-pressure area ", reduce the pressure in air-flow velocity district simultaneously, this also will certainly increase the two pressure difference, and this effect is further conducive to antiseized material to be dispersed in uniformly in air-flow.
In a concrete embodiment, described pump orifice is 1:2-4 apart from the distance value of inlet end of described the first nozzle and the diameter of the inlet end of described the first nozzle with the ratio of the difference of the diameter of described spout, and the taper value of described the first nozzle is 1:3-6. This is because find by researcher's large quantity research, in set this region of pump orifice negative pressure value maximum, suction is the strongest, antiseized material is dispersed in intake stack has a best effect.
In a concrete embodiment, the guide barrel of guiding gas PARALLEL FLOW is installed at the nozzle of described the first nozzle. Because the flow direction of air-flow under the effect of the first nozzle is the radially tangential direction of the first nozzle, therefore the effect of guide barrel is the direction of the radially tangential direction of the first nozzle being changed into PARALLEL FLOW, horizontal flow to benefit be because the stressed of each point in the space at air-flow place equates, therefore it can make antiseized material be dispersed in uniformly in its residing space, that is to say that horizontal gas flow can make antiseized material send uniformly gas outlet. And have various flows to air-flow, due to can phase between them mutual interference produce disturbance, and the difference of the power of each point in the residing space of air-flow, causes antiseized material can not be dispersed in uniformly its residing space like this. The length of guide barrel is relevant to the speed of air-flow, that is to say, the speed of air-flow is larger, and the length of guide barrel is longer.
In a concrete embodiment, urceolus comprises the second nozzle of the outlet side that is arranged on urceolus, and the outlet side of inner core is arranged in the region of second nozzle. That is to say, in the time that inner core does not comprise the first nozzle, its clearly defined outlet side is arranged in the region of second nozzle; And in the time that inner core comprises the first nozzle, the first nozzle of inner core is arranged in the region of second nozzle so, be at least that the spout of the first nozzle is arranged in the region of second nozzle. In the region of the second nozzle when air-flow enters into the outlet side of inner core from the outlet side of inner core time, owing to approaching the end diameter of second nozzle of the first nozzle and be greater than the diameter of the spout of the first nozzle, therefore first air-flow is to slow down to the flow velocity of second nozzle from the spout position of the first nozzle, but because the diameter of second nozzle reduces gradually along the radial direction of air-flow, therefore air-flow will increase on the basis of the speed slowing down again to some extent, namely air-flow velocity is uprised by low, and this effect is conducive to antiseized material to be dispersed in uniformly in air-flow. Therefore the effect of second nozzle remains the speed that increases air-flow.
In a concrete embodiment, also comprise the control valve being connected with pump orifice. Preferably use metering rotary control valve, use the benefit of metering rotary control valve to be, can accurately control according to actual needs the flow of material.
The present invention also provides a kind of device that prevents the sticky wall of spray drying tower, and it comprises mechanism as above, and the air-flow distributor being connected with the gas outlet of described urceolus. Air-flow distributor is for changing into uprush by the air-flow with antiseized material of sending from gas outlet. Air-flow distributor for example, can be hot-air distributor.
In a concrete embodiment, air-flow distributor is the one in distributor, horizontal perforated panel distributor and the fins set distributor that is similar to R shape.
The present invention provides again a kind of method that prevents the sticky wall of spray drying tower, and described method is sent to spraying dry section by device as above by air-flow and antiseized material.
In a concrete embodiment, the density of described antiseized material in described air-flow is 0.5-2.4kg/m3. Preferably the density of described antiseized material in described air-flow is 0.8-1.6kg/m3。
By the feed arrangement of particular design of the present invention, realized the effect of sticky viscous material at the sticky wall of spray drying tower inwall, solved sticky viscous material spraying dry in the technical problem of long period production continuously.
Brief description of the drawings
Fig. 1 is material dispersion device I schematic diagram.
Fig. 2 is material dispersion device II schematic diagram.
Fig. 3 is spray drying tower schematic diagram.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described below.
According to the mechanism that prevents the sticky wall of spray drying tower of the present invention, as shown in Figure 1, this device comprises the urceolus 21 with air inlet 19 and gas outlet 20; And be located at the pump orifice 22 on urceolus, for provide antiseized material in urceolus 21; Wherein, the air-flow flowing through in urceolus 21 carries antiseized material and flows out through gas outlet 20. Urceolus 21 can be made up of metal or heat proof material, and the urceolus 21 of making by described material, can reach the requirement of heat-resisting wind. Entering into after drying tower cylindrical shell 2 (as Fig. 3) with the gas of antiseized material, can be distributed to each position in drying tower, to improve the phenomenon of the sticky wall of sticky viscous material. Pump orifice 22 can be connected with one end 14a of suction cylinder 14, and the diameter of suction cylinder 14 can be set to 150 millimeters.
As shown in Figure 1, this mechanism also comprises the inner core 9 being arranged in urceolus 21, and the longitudinal axis of inner core 9 is parallel to the longitudinal axis of institute's urceolus 21, and the longitudinal axis of inner core 9 can overlap with the longitudinal axis of urceolus 21, and the two ends of inner core 9 are respectively inlet end 9a and outlet side 9b. Inlet end 9a air inlet 19 is communicated with. Inner core 9 extends across pump orifice 22.
As shown in Figure 2, the spout 10a place that the outlet side 9b of inner core 9 arranges the first nozzle 10, the first nozzles 10 is provided with for guiding gas to carry out the guide barrel 11 of advection, and the stub end 10b of the first nozzle 10 and the inlet end 9a of inner core 9 are connected. The spout 10a of guide barrel 11 and the first nozzle 10 can be by being weldingly connected, or the moulding of integral type structure. The stub end 10b of the inlet end 9a of inner core 9 and the first nozzle 10 can weld or the moulding of integral type structure. The inlet end 9a of inner core 9 can be circular straight barrel, its diameter can be set to 150 millimeters, the diameter of the stub end 10b of the first nozzle 10 can be set to 150 millimeters, the diameter of the spout 10a of the first nozzle 10 can be set to 100 millimeters, guide barrel 11 can be circular straight barrel, its diameter can be set to 100 millimeters, and its length can be set to 10 millimeters.
Pump orifice 22 is 1:2-4 apart from the distance value of stub end 10b of the first nozzle 10 and the diameter of the stub end 10b of the first nozzle 10 with the ratio of the difference of the diameter of spout 10a, and the taper value of described the first nozzle 10 is 1:3-6.
The second end 23 at urceolus 21 arranges second nozzle 15. The all or part of of the first nozzle 10 can be in second nozzle 15. In this way, can realize the effect that the speed of air-flow in the region of second nozzle 15 increases, the antiseized material that is so more conducive to leak down from pump orifice 22 is distributed in drying tower tower cylinder 2 (as Fig. 3) equably. Urceolus 21 first end 21a can be circular straight barrel, and its diameter is 300 millimeters;
The cross-sectional area of the first end 21a of urceolus 21 be the inlet end 9a of inner core 9 cross-sectional area 2-6 doubly, its effect optimum in the time being 4 times.
Gas outlet 20 is connected by trunnion 16 with air-flow outlet pipe 201. Trunnion 16 can be straight barrel, and its diameter can be set to 150 millimeters, and its length can be set to 260 millimeters. Trunnion 16 plays water conservancy diversion, the effect of combing wind direction. The cross-sectional area of trunnion 16 be guide barrel 11 cross-sectional area 1.5-4 doubly, when being 2.25 times of its effect optimums.
Air inlet 19 is connected with air-flow admission line 200, air-flow admission line 200 is set to rectangle, long 200 millimeters, wide 130 millimeters, admission line 200 is set to rectangular object and adapts with corresponding air blast, and the ratio of the cross-sectional area of the cross-sectional area of air inlet 19 and air-flow admission line 200 is 0.68.
As Fig. 3, this mechanism also comprises the hopper 3 being connected with pump orifice 22, and preferably hopper 3 is connected by valve 5 with pump orifice 22, and valve 5 is preferably metering rotary control valve. The outlet 5a of rotary valve 5 is connected with the first blind flange 18. Use the benefit of metering rotary control valve to be that it can adjust antiseized material in hopper 3 and enter into according to technological requirement the addition of pump orifice 22. Rotary valve 5 can adopt litter formula to clean rotary valve, and there is end cap at the impeller two ends of rotary valve, and impeller blade end is polished into chamfering, and impeller quantity is 8 blades, is " V " font between adjacent blades, and blade and valve pocket gap are 0.15mm. Rotary valve is to adopt frequency converter to adjust wheel speed, 0.1～10 liter/turn adjustable rotary valve. Between valve 5 and hopper 3, be also provided with dish valve 4.
It is a kind of as the device that prevents the sticky wall of spray drying tower of Fig. 3 that the present invention also provides, and it comprises mechanism as above, and the air-flow distributor 1 being connected with the gas outlet 20 of urceolus 21. Air-flow distributor 1 is for changing into uprush by the air-flow with antiseized material of sending from gas outlet 20. Air-flow distributor 1 for example, can be hot-air distributor, and can be for being similar to the one in distributor, horizontal perforated panel distributor and the fins set distributor of R shape.
In conjunction with Fig. 1 and Fig. 3, the gas outlet 20 of feeding device 100 is connected by hot-blast outlet pipeline 201 with air-flow distributor 1, utilize being uprised by low of hot blast flow velocity, in urceolus 21 chambeies beyond hot-air flow region, locate to form " negative pressure " district, and air-flow velocity is uprised by low, antiseized material even suction is arrived to the hot-blast outlet pipeline 201 being connected with spray drying tower cylindrical shell 2, and mix with hot blast, utilize the air-flow distributor 1 of dry tower top that the horizontal hot blast that mixes antiseized material is converted to vertical hot blast, at dry tower top, straight hot blast contacts with powder rubber droplet, the hot blast of the antiseized material of blending carries out dry time contacting with powder rubber to droplet, fully mix, antiseized material surrounds whole powder rubber droplet district, just can not produce tower top wall cling phenomenon. because of without secondary air flow, can not upset the hot-air flow that air-flow distributor 1 distributes simultaneously yet, can not affect the uniformity of powder rubber moisture content. final result is to make not conglomeration of finished product, thereby reaches smooth effect, has ensured product quality.
In addition, after requiring to polish smooth by the inwall of drying tower cylindrical shell 2, carry out antiseized spray treatment, and spray different types of polytetrafluorethylecoatings coatings according to different material, as the materials such as the copolymer (PFA) of polytetrafluoroethylene (PTFE) (PTFE (4F)), perfluoroalkyl vinyl ether can further reduce the phenomenon of gluing wall.
The present invention provides again a kind of method that prevents the sticky wall of spray drying tower, the load of the mechanism of described method by as above by the antiseized material of control valve control is by antiseized material, for example antiseized material is silica, is sent to the spraying dry section of powder rubber by air-flow. The density of antiseized material in air-flow in trunnion 16 or hot-blast outlet pipeline 201 is 0.5-2.4kg/m3, be preferably 0.8-1.6kg/m3。
By the feed arrangement of particular design of the present invention, realized the effect of sticky viscous material at the sticky wall of spray drying tower inwall, solved sticky viscous material spraying dry in the technical problem of long period production continuously.
Although invention has been described with reference to preferred embodiment, without departing from the scope of the invention, can carry out various improvement and can replace parts wherein with equivalent it. Especially, only otherwise have structural hazard, every technical characterictic of mentioning in each embodiment all can combine in any way. The present invention is not limited to disclosed specific embodiment in literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (11)
1. a mechanism that prevents the sticky wall of spray drying tower, is characterized in that, comprising:
There is the urceolus of air inlet and gas outlet; And
Be located at the pump orifice on described urceolus, for antiseized material is provided in urceolus;
Wherein, the air-flow flowing through in described urceolus can carry described antiseized material and flow out through described gas outlet.
2. mechanism according to claim 1, is characterized in that, also comprises the inner core being arranged in described urceolus, described inThe longitudinal axis of cylinder is parallel to the longitudinal axis of described urceolus, and the two ends of described inner core are respectively inlet end and outlet side; Wherein, described gasStream flows through in described inner core.
3. mechanism according to claim 2, is characterized in that, described inner core extends across described pump orifice.
4. according to the mechanism described in claim 2 or 3, it is characterized in that, described inner core comprises and is arranged on giving vent to anger of described inner coreThe first nozzle of end.
5. mechanism according to claim 4, is characterized in that, described pump orifice is apart from the distance of the inlet end of described the first nozzleDiameter from the inlet end of value and described the first nozzle is 1:2-4 with the ratio of the difference of the diameter of described spout, and described the first sprayThe taper value of mouth is 1:3-6.
6. according to the mechanism described in claim 4 or 5, it is characterized in that, at the nozzle of described the first nozzle, guiding is installedThe guide barrel of gas PARALLEL FLOW.
7. according to the mechanism described in any one in claim 2 to 6, it is characterized in that, described urceolus comprise be arranged on described outsideThe second nozzle of the outlet side of cylinder, and the outlet side of described inner core arranges in the region of described second nozzle.
8. according to the mechanism described in any one in claim 1 to 7, it is characterized in that, also comprise being connected with described pump orificeControl valve.
9. prevent a device for the sticky wall of spray drying tower, it comprises according to the spraying that prevents described in any one in claim 1-8The mechanism of the sticky wall of drying tower, and the air-flow distributor being connected with the gas outlet of described urceolus.
10. a method that prevents the sticky wall of spray drying tower, is characterized in that, described method is by as claimed in claim 9Air-flow and antiseized material are sent to spraying dry section by device.
11. methods according to claim 10, is characterized in that, the density of described antiseized material in described air-flow is0.5-2.4kg/m3。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410563599.XA CN105588418B (en) | 2014-10-21 | 2014-10-21 | A kind of device and method for preventing spray drying tower from gluing wall |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410563599.XA CN105588418B (en) | 2014-10-21 | 2014-10-21 | A kind of device and method for preventing spray drying tower from gluing wall |
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| CN105588418A true CN105588418A (en) | 2016-05-18 |
| CN105588418B CN105588418B (en) | 2018-11-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107969688A (en) * | 2017-11-27 | 2018-05-01 | 甘肃省敦煌种业果蔬制品有限公司 | A kind of soft capsule of lycopene and its production technology |
| CN108043056A (en) * | 2017-12-14 | 2018-05-18 | 上海中医药大学 | A kind of anti-stick wall auxiliary material powder of spray-dried instrument supplies powder method and powder feeder unit |
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| SU848073A2 (en) * | 1977-05-31 | 1981-07-23 | Всесоюзный Научно-Исследовательскийинститут Молочной Промышленности | Pneumatic injection nozzle |
| CN1123772A (en) * | 1994-11-29 | 1996-06-05 | 淄博市新材料研究所 | Manufacture of hollow glass micro-ball |
| CN103648630A (en) * | 2011-08-01 | 2014-03-19 | 瓦克化学股份公司 | Process for producing dispersible powders |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU848073A2 (en) * | 1977-05-31 | 1981-07-23 | Всесоюзный Научно-Исследовательскийинститут Молочной Промышленности | Pneumatic injection nozzle |
| CN1123772A (en) * | 1994-11-29 | 1996-06-05 | 淄博市新材料研究所 | Manufacture of hollow glass micro-ball |
| CN103648630A (en) * | 2011-08-01 | 2014-03-19 | 瓦克化学股份公司 | Process for producing dispersible powders |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107969688A (en) * | 2017-11-27 | 2018-05-01 | 甘肃省敦煌种业果蔬制品有限公司 | A kind of soft capsule of lycopene and its production technology |
| CN108043056A (en) * | 2017-12-14 | 2018-05-18 | 上海中医药大学 | A kind of anti-stick wall auxiliary material powder of spray-dried instrument supplies powder method and powder feeder unit |
| CN108043056B (en) * | 2017-12-14 | 2020-09-25 | 上海中医药大学 | Powder supply method and powder supply device for anti-sticking wall accessory powder of spray dryer |
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