Preparation method of high-load modified silica gel dehumidification rotary core

A high-load, modified technology, applied in separation methods, chemical instruments and methods, silicon compounds, etc., can solve problems affecting adsorption performance and strength, and achieve increased silica gel loading, low desorption temperature, water absorption rate and The effect of increasing the saturated adsorption capacity

Pending Publication Date: 2021-04-27
QINGDAO HSJ ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the adsorption performance, thermal stability and mechanical strength of the modified silica gel are improved to a certain extent, due to the particularity of the initial core, the loading capacity of the modified silica gel has certain limitations, which in turn affects the adsorption performance and strength.

Method used

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  • Preparation method of high-load modified silica gel dehumidification rotary core
  • Preparation method of high-load modified silica gel dehumidification rotary core
  • Preparation method of high-load modified silica gel dehumidification rotary core

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preparation example Construction

[0034] A method for preparing a modified silica gel desiccant rotor core with a high loading capacity, comprising the following steps:

[0035] S1: drying and purging the sample block of the dehumidification rotor core, and then immersing in water glass and then purging with hot air. The concentration of water glass is 25%-35%. In a preferred embodiment, the concentration of the water glass is 30%.

[0036] The drying is at 100-120° C. for 20-30 min, and the purging is at a wind speed of 0.5-2 m / s for 10-15 min. In a preferred embodiment, the wind speed is 1 m / s.

[0037] In a preferred embodiment, the immersion is repeated pulling and immersion for 10-15 minutes.

[0038] The hot air blowing is carried out at 30-40° C. with hot air of 0.5-2 m / s for 0.5-2 hours. In a preferred embodiment, the wind speed is 1 m / s, and the hot air blowing time is 1 hour.

[0039] S2: Repeatedly and evenly spray the remaining water glass in step (1) onto the sample block obtained in step (1), ...

Embodiment 1

[0048] S1: Dry the dehumidified core glass fiber sample block at 100°C for 20 minutes, blow it with a wind speed of 1m / s for 10 minutes, and then soak it in water glass with a concentration of 25% at room temperature. After repeated pulling and dipping for 10 minutes, use 30 ℃, 1m / s hot air blowing for 1h;

[0049] S2: Spray the remaining water glass in step S1 on the sample block obtained in step S1, repeatedly and uniformly spray for 10 minutes, and blow with hot air at 30°C and 1 m / s for 2 hours.

[0050] S3: Select zinc sulfate to prepare a 10% aqueous solution, and dip the sample block obtained in step S2 in the solution in a 60°C water bath. During the reaction, use concentrated sulfuric acid to adjust the pH back to pH=1.0, dip for 1 hour, and react for 5 minutes each time Make a callback;

[0051] S4: Rinse the sample block reacted in step S3 until it is neutral with deionized water, and roast and dry at 100° C. to obtain a high loading rate dehumidification core samp...

Embodiment 2

[0054] S1: Dry the dehumidified core glass fiber sample block at 110°C for 20 minutes, blow it with a wind speed of 1m / s for 15 minutes, and then soak it in water glass with a concentration of 35% at room temperature. After repeated pulling and dipping for 15 minutes, use 40 ℃, 0.5m / s hot air blowing for 2h;

[0055] S2: Spray the remaining water glass in step S1 on the sample block obtained in step S1, repeatedly and uniformly spray for 15 minutes, and blow with hot air at 40°C and 0.5 m / s for 2 hours.

[0056] S3: Select zinc sulfate to prepare a 15% aqueous solution, and dip the sample block obtained in step S2 in the solution in a 65°C water bath. During the reaction, use concentrated sulfuric acid to adjust the pH back to pH=1.2, dip for 1 hour, and react for 5 minutes each time Make a callback;

[0057] S4: Rinse the sample blocks reacted in step S3 until neutral with deionized water, and bake and dry at 120° C. to obtain high-loading dehumidification core sample blocks...

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Abstract

The invention discloses a preparation method of a high-load modified silica gel dehumidification rotary core, and belongs to the field of dehumidification material preparation. The method comprises the following steps of: (1) drying and purging a sample block of the dehumidification rotary core, then soaking the sample block in water glass, and then purging the sample block with hot air; (2) repeatedly and uniformly spraying the residual water glass in the step (1) onto the sample block obtained in the step (1), and then purging the sample block with hot air; (3) soaking the sample block obtained in the step (2) in a zinc salt solution in a water bath, and adjusting the pH value to an initial pH value by using acid in the reaction process; and (4) washing the sample block obtained in the step (3) with water until the sample block is neutral, and roasting and drying the sample block. According to the method, the modified silica gel dehumidification rotary core which is large in effective load capacity, good in adsorption performance and high in mechanical strength is obtained through twice dipping and metal doping process control.

Description

technical field [0001] The invention relates to the field of preparation of dehumidification materials, in particular to a preparation method of a high-load modified silica gel dehumidification rotor core. Background technique [0002] The rotary dehumidification system has been widely used because of its advantages of energy saving, large dehumidification capacity, high efficiency and continuous supply of dry air with low dew point. In this system, the dehumidification rotor is the heart of the system, and the performance of the adsorbent in the dehumidification rotor and the content of the adsorbent are the key to determine the dehumidification performance of the system. [0003] Commonly used adsorbents include lithium chloride, molecular sieves, silica gel, and metal ion-doped silica gel. Lithium chloride has a large adsorption capacity, good dehumidification effect, and low regeneration energy consumption, but its solution is easy to float and is highly corrosive to pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/32B01D53/26
CPCB01J20/103B01J20/024B01J20/3214B01J20/3234B01D53/261
Inventor 侯鸿杰王振青崔孟涛郅立鹏
Owner QINGDAO HSJ ENVIRONMENTAL PROTECTION TECH CO LTD
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