Method for preparing lithium chloride silica gel composite turning wheels

Abstract

The invention relates to a method for preparing lithium chloride silica gel composite turning wheels. No dehumidification turning wheels which are good in dehumidification performance and still have good moisture absorption performance and moisture absorption stability when regeneration temperature is low exist at present. The method sequentially comprises the processes of making paper, supplying silica gel, rolling turning-wheel bodies and molding turning wheels, and is characterized in that the method also comprises the processes of impregnating with silicate solution, acidizing, calcining and impregnating with lithium chloride solution in turn between the process of rolling turning-wheel bodies and the process of molding turning wheels; in the process of impregnating with silicate solution, the turning-wheel bodies are impregnated with silicate aqueous solution in a concentration of 10 to 30 percent; in the acidizing process, the turning-wheel bodies are soaked in acid solution in a concentration of 3 to 30 percent; in the calcining process, the turning-wheel bodies are calcined at a high temperature between 400 and 500 DEG C; and in the process of impregnating with lithium chloride solution, the turning-wheel bodies are impregnated with the lithium chloride solution in a concentration of 15 to 40 percent. The turning wheels prepared by the method have the advantages of good dehumidification performance, low regeneration temperature, convenient manufacture and long lifespan.

Description

technical field [0001] The invention relates to a preparation method of a lithium chloride silica gel composite runner, the lithium chloride silica gel composite runner is mainly installed in a rotary dehumidifier, can realize the dehumidification effect on air, and belongs to a part of the rotary dehumidifier . Background technique [0002] In recent years, people's requirements for the quality of life have become higher and higher, so the requirements for the environment and energy consumption of building air conditioning and ventilation systems have become more stringent, making building air conditioning and ventilation systems must have higher standards. The one-time investment of traditional compression refrigeration and air-conditioning equipment is large, the cost of equipment operation is expensive, the repair and maintenance are complicated, and it will cause "sick building syndrome" and serious environmental pollution. [0003] At present, the temperature and humi...

AI Technical Summary

Problems solved by technology

If the adhesion amount of silicic acid is increased by multiple dipping, the adhesion of the silicic acid generated later will be poor, and the silicic acid will easily escape. When the adsorption amount is too large, the honeycomb pores of the dehumidification wheel will be blocked; if Increase the adhesion of silicic acid by increasing the concentration of silicate, that is, increase the amount of active silica gel at one time, which will also cause the viscosity of the silicate aqueous solution to be too high and cause the honeycomb pores to be blocked

It can be seen that there are great difficulties in improving the dehumidification capacity of the desiccant rotor.

[0006] At present, there are also dehumidification runners prepared by using silica gel-halogen salt composite desiccant materials. For example, the Chinese patent with the publication date of August 6, 2003 and the publication number CN1433833 discloses a silica gel- Halogen salt composite desiccant material, the preparation method of the silica gel-halogen salt composite desiccant material is as follows: first heat the silica gel runner material at 90±5°C until the quality of the runner material no longer decreases, and then turn the silica gel The wheel material is isolated from the air, and after cooling to room temperature, it is soaked in a halogen salt solution, so that the halogen salt solution enters the silica gel channel, and after the solution is drained, the silica gel wheel material that has absorbed the halogen salt solution is placed in a drying box to heat. The heating temperature is fixed at 90±5°C until the weight of the silica gel runner material no longer decreases, so that the halogen salt solid remains in the silica gel channel, and the halogen salt content ranges from 10% to 40%. It is prepared by the above method In the desiccant material, the content of halogen salt is less, because in the above method, the silica gel runner material after heating and cooling at 90±5°C is soaked in the halogen saline solution, because the surface of the silica gel runner ceramic fiber paper A large amount of silica gel has been attached to the pores, and the surface pores of the silica gel are very small, which makes it difficult for the halogen salt to be fully adsorbed into the ceramic fiber paper and silica gel material, so the adsorption amount of the halogen salt is difficult to increase, that is, the adsorbed halogen salt, because only the surface is adsorbed, Adhesion is very poor, and the dehumidification rotor is repeatedly blown by the measured wind during use, and the halogen salt will slowly fall off, which will affect the dehumidification performance of the rotor and shorten the service life.

[0007] To sum up, there is no dehumidification rotor with good dehumidification performance at present. When the regeneration temperature is low, it still has good hygroscopic performance and stable moisture absorption.

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