Rotary flash drying apparatus and drying method

A technology of rotary flash evaporation and drying equipment, which is applied in the direction of separation method, drying solid material, drying gas arrangement, etc. It can solve the problems that are not suitable for the catalyst synthesis production process, etc., and achieve large adjustment room, eliminate filter bag bonding, and high drying strength Effect

Active Publication Date: 2017-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not suitable for catalyst synthesis production process

Method used

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  • Rotary flash drying apparatus and drying method

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Such as figure 1 , a spin flash drying equipment, comprising a belt filter 1, a washing water heating tank 2, a spin flash drying device 3, a cyclone separator 4, a gas drying device 5, a fan 6, and an air heater 7;

[0046] The belt filter 1 is a three-stage filter, the outlet of the filter cake is connected to the feed port of the rotary flash drying device 3, and the outlet on the top of the rotary flash drying device 3 is connected to the inlet pipe of the cyclone separator 4. The gas outlet of the cyclone separator 4 is connected to the air inlet of the washing water heating tank 2, the gas outlet of the washing water heating tank 2 is connected to the air inlet of the gas drying device 5, and the washing water outlet of the washing water heating tank 2 is connected to the washing water pipe The gas outlet of the gas drying device 5 is connected to the air inlet of the fan 6, and the gas outlet pipeline of the fan 6 is connected to the cyclone separator 4, and an a...

Embodiment 2

[0050] The equipment of Example 1 was used. Alumina (pseudoboehmite) rotary flash drying method comprises the following steps:

[0051] Step 1: Filter the pseudo-boehmite slurry A prepared by the gelation method with the first section I of the belt filter 1 to separate the waste water F, and then in the second section II of the belt filter 1, the belt filter 1 The third section III is washed twice, and the third section III of the belt filter 1 uses heated washing water, and the obtained secondary washing liquid E is returned to the second section II of the belt filter 1 for washing, and filtering The washing solution D is discharged once to achieve the purpose of recycling. And waste water F, primary washing liquid D are used as filter washing waste water discharge device, and pseudo-boehmite slurry A forms filter cake G at the end of belt filter 1;

[0052] Step 2: Send the filter cake G containing 55 wt% (weight percent) of free water into the drying chamber of the spin f...

Embodiment 3

[0059] The equipment of Example 1 was used. Alumina (pseudoboehmite) rotary flash drying method is:

[0060] Step 1: Filter the pseudo-boehmite slurry A prepared by the gelation method with the first section I of the belt filter 1 to separate the waste water F, and then in the second section II of the belt filter 1, the belt filter 1 The third section III is washed twice, and the third section III of the belt filter 1 uses heated washing water, and the obtained secondary washing liquid E is returned to the second section II of the belt filter 1 for washing, and filtering The washing solution D is discharged once to achieve the purpose of recycling. And waste water F, primary washing liquid D are used as filter washing waste water discharge device, and pseudo-boehmite slurry A forms filter cake G at the end of belt filter 1;

[0061] Step 2: Send the filter cake G containing 60 wt% (weight percent) of free water into the drying chamber of the spin flash dryer 3 with a feeder....

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Abstract

The invention provides a rotary flash drying apparatus. The rotary flash drying apparatus comprises a belt filter, a rotary flash drying device, a cyclone separator, a washing water heating tank, a gas drying device and a fan, wherein the gas outlet of the cyclone separator is connected with the gas inlet of the washing water heating tank; the gas outlet of the washing water heating tank is connected with the gas inlet of the gas drying device; the liquid outlet of the washing water heating tank is connected with a washing water pipeline of the belt filter; the gas outlet of an adsorption tower is connected with the gas inlet of the fan through a pipeline; and the gas outlet of the fan is connected with the gas inlet of the rotary flash drying device. The invention also provides a drying method. According to the invention, closed circulation is employed and no tail gas is discharged in the whole process; high-temperature air-flow containing dust and located at the outlet of the cyclone separator enters the washing water heating tank for heating washing water, so most heat is recovered; and low-temperature gas discharged from the washing water heating tank is dried by the adsorption tower, then heated by an air heater and then reused, so low-temperature waste heat of the gas is completely used.

Description

technical field [0001] The invention relates to the field of material drying, in particular to a spin flash drying device and a drying method. Background technique [0002] The industrial production methods of molecular sieve catalysts include co-precipitation method, directing agent method, colloidal method, etc. The main process is to form a reaction mixture with soluble silicon source and aluminum source and crystal grains according to a certain processing sequence, and then crystallize at 100 ° C. change. The reaction process is carried out in an aqueous solution, and the synthesis mother liquor contains a catalyst. After the reaction, a series of processes such as drying and particle recovery are required to complete the collection of the product. [0003] For the traditional spin flash drying device, in order to ensure the drying effect, the water content of the powder product is generally required to be low, but in some processes, in order to meet the requirements of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D29/09B01D29/78B01D50/00B01D53/26B01D53/04F26B3/00F26B21/00
CPCY02P70/10
Inventor 王晶晶赵利民王永林张桂平关伟华金艳
Owner CHINA PETROLEUM & CHEM CORP
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