CN1919725A

CN1919725A - Fluidizing and drying preparing technique for sodium perborate monohydrate

Info

Publication number: CN1919725A
Application number: CN 200610068757
Authority: CN
Inventors: 郭文; 吴静; 李选友; 毛荣; 金鹏
Original assignee: Shandong Tianli Drying Equipment Co Ltd
Current assignee: Shandong Tianli Drying Co., Ltd.
Priority date: 2006-09-05
Filing date: 2006-09-05
Publication date: 2007-02-28
Anticipated expiration: 2026-09-05
Also published as: CN100376470C

Abstract

The invention discloses a water sodium borate fluidization and drying preparing technology, which comprises the following steps: drying standard rasorite under fluidization condition after transmitting; controlling fluidization temperature of air flow between 150 and 220 deg.c with fluidization speed at 0.5-0.8m/s for over 50min; cooling water sodium borate; packing; dedusting for the first time in the cyclone duster; purifying for the second time through cloth bag duster; transmitting collected dried powder in the finished product package.

Description

The monohydrate sodium stannate fluidizing and drying preparing technique

Technical field

The present invention relates to the dry reparation technology of monohydrate sodium stannate.

Background technology

Sodium peroxoborate is the fine chemical product with critical positions and meaning in modern inorganic chemicals industry, Sodium peroxoborate is mainly used in oxygenant, bleaching of cloth agent and the sand-out pressure fat of doing the colour developing of intellectual circle's dyestuff, pharmaceutically as sterilizing agent and sterilant, also be used as mordant, deodorizing composition, few additive of electrodeposit solution, analytical reagent, organic synthesis polymerizing agent and system toothpaste, makeup etc.

Sodium peroxoborate exists with four water sodium perborate and two kinds of forms of monohydrate sodium stannate usually.Compare with four water sodium perborate, monohydrate sodium stannate has extra high active o content, this content is higher by 50% than the active o content of four water sodium perborate, and having higher dissolution rate, these character make the magnetism that monohydrate sodium stannate demonstrates to be increased day by day in the field of detergent composition.Remove three crystal water can produce and obtain monohydrate sodium stannate after steam heating by four water sodium perborate being placed on fluidized-bed, the molecular formula of monohydrate sodium stannate is NaBO ₃H ₂O is the white crystals particle.

Four water sodium perborate uses warm air as drying medium, and the present useful intermittent type fluidized-bed of reparation technology that adopts is the exsiccant mode in batches, and this mode output is little, efficient is low, can not maximize; The also mode of useful vibra fluidized bed drying, this mode is short time of drying, needs twice, the three times dry successes of ability, and vibrated fluidized bed manufacturing and maintenance difficulty are big.

Summary of the invention

The present invention is directed to the deficiency that existing monohydrate sodium stannate exists on reparation technology, provide a kind of simple and convenient, efficient is high, the monohydrate sodium stannate fluidizing and drying preparing technique of reliable and stable, environmental protection.

The technical process of monohydrate sodium stannate fluidizing and drying preparing technique of the present invention is:

Drying is carried out in the quantitative conveying of qualified four water sodium perborate back under fluidized state, the temperature of hot blast is controlled between the 150-220 degree during fluidisation, the fluidizing velocity of air-flow is 0.5-0.8m/s, hot blast and material are finished heat exchange and drying process in fluidized layer, be more than 50 minutes time of drying, and the four water sodium perborate dehydration is monohydrate sodium stannate; Then monohydrate sodium stannate is cooled off under fluidized state; Cool off and qualifiedly pack after reaching packing instructions; Dusty gas is introduced into tornado dust collector and carries out the dedusting first time, again emptying behind the sack cleaner secondary-cleaned; Collected dry powder is sent into finished product package.

The present invention produces with dedusting monohydrate sodium stannate to carry out together.In producing process, drying and cooling all are to carry out under fluidized state, production efficiency height, reliable product quality.Drying and cooled dusty gas are discharged after through twice filtration, purification, have reduced the pollution to environment, and the material that filters out has reduced waste after reclaiming.The present invention is simple and convenient, reliable and stable.

Description of drawings

Fig. 1 is for realizing system's composition diagram of technical process of the present invention.

Fig. 2 is the structural representation of fluid bed dryer among the present invention.

Among the figure: 1, cooling blower, 2, cool-heat-exchanger, 3, gas blower, 4, vapor heat exchanger, 5, lift, 6, quantitative auger, 7, fluid bed dryer, 8, heat-condutive oil heat exchanger, 9, cyclonic separator, 10, star-shaped feeder, 11, the cloth bag conveying auger, 12, star-shaped feeder, 13, sack cleaner, 14, induced draft fan, 15, lower air chamber, 16, fluidisation section, 17, expanding reach, 18, overflow port.

Embodiment

Fig. 1 has provided system's composition diagram of realizing technical process of the present invention.Equipment used comprises cooling blower 1, cool-heat-exchanger 2, gas blower 3, vapor heat exchanger 4, lift 5, quantitative auger 6, fluid bed dryer 7, heat-condutive oil heat exchanger 8, cyclonic separator 9, star-shaped feeder 10, cloth bag conveying auger 11, star-shaped feeder 12, sack cleaner 13, induced draft fan 14.Lift 5, quantitative auger 6, fluid bed dryer 7 connect successively.The lower air chamber 15 of gas blower 3, vapor heat exchanger 4, heat-condutive oil heat exchanger 8 and fluid bed dryer 7 connects successively.The lower air chamber 15 of cooling blower 1, cool-heat-exchanger 2 and fluid bed dryer 7 connects successively.Fluid bed dryer 7, cyclonic separator 9, sack cleaner 13 and induced draft fan 14 connect successively.Air is introduced vapor heat exchanger 4 and heat-condutive oil heat exchanger 8 heating by gas blower 3, and cooling blower 1 and cool-heat-exchanger 2 are used to produce air cooling.

Fluid bed dryer 7 is visual plants of realizing technical process of the present invention.Its structure is followed successively by lower air chamber 15, fluidisation section 16 and the expanding reach 17 of connection from bottom to top as shown in Figure 2.Be provided with heating fluidising chamber and cooling fluidising chamber in the fluidisation section 16, be provided with air distribution plate between the two, the side of cooling fluidising chamber is provided with overflow port 18, and air distribution plate adopts the side air-out structure, not only can prevent the material lower air chamber 15 of bleeding, and can make the material continous-stable shift to overflow port 18.Because the side-blown of thermal medium goes out, can guarantee that large granular materials in time discharges, improved the material boiling state, residence time of material is short, and drying efficiency is big.Four water sodium perborate is in fluidisation section 16 under certain wind speed, blown afloat and be suspended in the air-flow body by air-flow and do free movement, collide mutually between particle, mix, form fluidized-bed layer, whole bed presents the form of similar liquids, the charge level of one basic horizontal is arranged at the bed top, and the severe smaller particles is floated on it, and this phenomenon is called the solid particulate fluidised formization.And the mean wind speed of this moment is called normal fluidizing velocity, can regulate the residence time of material in bed by the material thickness of regulating in the bed, four water sodium perborate can reach the material requirement when the bed inner drying is more than 50 minutes, form monohydrate sodium stannate.

Fluid bed dryer 7 can be finished drying, process for cooling process simultaneously, product moisture content is uniform and stable, epigranular, discharging can reach packaging temp, the making and the running cost of system have been reduced, dry materials removes crystal water after reach packaging temp after the cooling in the fluidized-bed, has reduced the operation easier of system, realizes automation of operation easily.Fluid bed dryer 7 is made by the material of ability wet atmospheric corrosion, and the abrasion of the anti-solids movement of energy, and comparatively commonly used is stainless material.

Technological process of the present invention is:

Satisfactory qualified four water sodium perborate is promoted to quantitative auger 6 by lift 5, in the quantitative fluidisation section 16 of sending into fluid bed dryer 7.Air is introduced vapor heat exchanger 4 and heat-condutive oil heat exchanger 8 heating by gas blower 3, the lower air chamber 15 of air admission fluid bed dryer 7 bottoms after the heating, and the air distribution plate that passes again on it enters the heating fluidising chamber of fluidisation section 16.Temperature when air-flow enters fluidisation section 16 is controlled between the 150-220 degree, and the temperature in the fluidisation section 16 is between fusing point to 80 degree of four water sodium perborate, and the fluidizing velocity of air-flow is got 0.5-0.8m/s.The warm air that enters bed in this process is effectively controlled, thereby makes an interior material keep stable fluidization, and finishes heat exchange, drying process with material in bed, and be more than 50 minutes time of drying, and final dewatering is a monohydrate sodium stannate.Under the effect of air distribution plate, the fluidisation cooling is continued in the cooling zone that the fluidizing particulate product is directionally shifted in the fluidisation section 16 in fluidisation section 16.Indoor by the freezing air that cooling blower 1 and cool-heat-exchanger 2 produce by the cooling fluidisation that lower air chamber 15 enters fluidisation section 16.And finally cool off qualified reaching after the packing instructions and discharge by the overflow port 18 of fluid bed dryer 7.Dusty gas in the fluid bed dryer 7 is introduced into tornado dust collector 9 by the outlet on the expanding reach 17 and carries out the dedusting first time, passes through induced draft fan 14 emptyings again behind sack cleaner 13 secondary-cleaneds.Send into final product area by tornado dust collector 9 collected dry powder by star-shaped feeder 10.Send into final product area by star-shaped feeder 12 by cloth bag conveying auger 11 by sack cleaner 13 collected dry powder.

The present invention compared with former technology, and technical process is simple and convenient, and required suite of equipment is simple to operate, and is easily manufactured, and elasticity is big; Dried tail gas is through twice dedusting, the Environmental indicators compliance with environmental protection requirements.

Claims

1, a kind of monohydrate sodium stannate fluidizing and drying preparing technique, it is characterized in that: its technical process is: drying is carried out in the quantitative conveying of qualified four water sodium perborate back under fluidized state, the temperature of hot blast is controlled between the 150-220 degree during fluidisation, the fluidizing velocity of air-flow is 0.5-0.8m/s, hot blast and material are finished heat exchange and drying process in fluidized layer, be more than 50 minutes time of drying, and the four water sodium perborate dehydration is monohydrate sodium stannate; Then monohydrate sodium stannate is cooled off under fluidized state; Cool off and qualifiedly pack after reaching packing instructions; Dusty gas is introduced into tornado dust collector and carries out the dedusting first time, again emptying behind the sack cleaner secondary-cleaned; Collected dry powder is sent into finished product package.

2, a kind of system that realizes the described monohydrate sodium stannate fluidizing and drying preparing technique of claim 1 is characterized in that: comprise cooling blower, cool-heat-exchanger, gas blower, vapor heat exchanger, lift, quantitative auger, fluid bed dryer, heat-condutive oil heat exchanger, cyclonic separator, star-shaped feeder, cloth bag conveying auger, star-shaped feeder, sack cleaner and induced draft fan; Lift, quantitative auger and fluid bed dryer connect successively; The lower air chamber of gas blower, vapor heat exchanger, heat-condutive oil heat exchanger and fluid bed dryer connects successively; The lower air chamber of cooling blower, cool-heat-exchanger and fluid bed dryer connects successively; Fluid bed dryer, cyclonic separator, sack cleaner and induced draft fan connect successively.

3, according to the system of the described monohydrate sodium stannate fluidizing and drying preparing technique of the described realization of claim 2 claim 1, it is characterized in that: described fluid bed dryer is followed successively by lower air chamber, fluidisation section and the expanding reach of connection from bottom to top; Be provided with heating fluidising chamber and cooling fluidising chamber in the fluidisation section, be provided with air distribution plate between the two, the side of cooling fluidising chamber is provided with overflow port.