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A drying system for sodium pyrosulfite

A technology of sodium metabisulfite and drying system, applied in the field of drying system of sodium metabisulfite, can solve the problems of unfavorable production and actual use, complicated drying system, difficult operation, etc., and achieve the effects of increasing drying time, thorough drying and uniform drying

Active Publication Date: 2019-10-29
广德樊缇卡信息咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical and chemical properties of sodium sulfite and sodium pyrosulfite are similar. This drying system is too complicated, difficult to operate, and high in cost, which is not conducive to practical use in production.

Method used

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  • A drying system for sodium pyrosulfite
  • A drying system for sodium pyrosulfite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 A drying system for sodium metabisulfite shown, including bucket dryer 1, controller, straight cylinder dryer 2 connected with bucket dryer 1, gas heater connected with bucket dryer 1 and straight cylinder dryer 2 3. Nitrogen generator 4 connected with the heater. The bucket dryer is used together with the straight cylinder dryer. Changing the parameters of the controller can increase the down-regulation time interval of the rotating hollow shaft, so that the sodium metabisulfite in the straight cylinder dryer can have a period of idle time after all the drying is completed, which is used to eliminate the straight cylinder. The moisture and moisture in the dryer can make the drying more thorough.

[0028] The lower end of the bucket dryer 1 is provided with a discharge port 11, the side of the bucket dryer 1 is respectively provided with a feed inlet 12 and a first air outlet 13, and the upper end of the bucket dryer 1 is heated with the gas. The buck...

Embodiment 2

[0034] like figure 1 A drying system for sodium metabisulfite shown, including bucket dryer 1, controller, straight cylinder dryer 2 connected with bucket dryer 1, gas heater connected with bucket dryer 1 and straight cylinder dryer 2 3. Nitrogen generator 4 connected with the heater. The difference from Example 1 is:

[0035] The bottom of the funnel 23 is provided with a plurality of auxiliary spiral slides 24 surrounding the main spiral slide 21, which can speed up the drying process, improve the drying efficiency, and avoid narrowing the mouth of the funnel due to ensuring that the downstream speed cannot be too fast. subsequent blockage.

[0036] The secondary spiral slide 24 is provided with an anti-skid layer, which slows down the sliding speed of sodium pyrosulfite, prolongs the drying time, and can make the drying effect better.

[0037] The rotating hollow shaft 14 extends downwards to form an extension part 141, and the funnel 23 is not connected to the extension...

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PUM

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Abstract

The invention discloses a drying system for sodium pyrosulfite. The drying system for the sodium pyrosulfite comprises a hopper-type dryer, a controller, a straight-barrel dryer and a gas heater; a discharging outlet is formed in the lower end of the hopper-type dryer; a feeding inlet and a first air outlet are formed in the side surfaces of the hopper-type dryer correspondingly; the upper end ofthe hopper-type dryer is connected with the gas heater; a rotary hollow shaft capable of extending and retracting up and down is disposed in the hopper-type dryer; the lower end of the rotary hollow shaft is connected with the discharging outlet; drying blades capable of extending and retracting are disposed on the rotary hollow shaft; the controller controls the rotary hollow shaft to extend or retract and rotate and controls the drying blades to extend or retract; the straight-barrel dryer communicates with the discharging outlet; a main spiral sliding ladder is disposed in the straight-barrel dryer; a hopper is disposed at the upper end of the main spiral sliding ladder and located below the discharging outlet; the side surface of the straight-barrel dryer communicates with the gas heater; and a second air outlet is formed in the side surface of the straight-barrel dryer. By means of the drying system for the sodium pyrosulfite, drying is uniform, water vapor is easy to remove, operation is simple, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of chemical equipment, in particular to a drying system for sodium metabisulfite. Background technique [0002] Sodium metabisulfite is white or yellow crystalline powder or small crystals with a strong SO2 smell and a specific gravity of 1.4. It is soluble in water and its aqueous solution is acidic. When in contact with strong acids, SO2 is released to form corresponding salts. It will oxidize when left in the air for a long time. It becomes Na2S2O6, so the product cannot be stored for a long time, and when it is higher than 150 degrees Celsius, it will decompose into SO2. [0003] At present, in the domestic production process of sodium pyrosulfite, airflow drying is generally used to dry it, but the bottom layer of sodium pyrosulfite is in a backlog state, so it is poorly heated and dried unevenly. Moreover, this drying method will also cause problems such as poor particle size of the material and easy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B17/12F26B21/14F26B25/04
CPCF26B17/122F26B21/14F26B25/04F26B2200/08
Inventor 山世广
Owner 广德樊缇卡信息咨询有限公司