Preparation method of naphthalene series dehydragent and special equipment thereof

The technology of a naphthalene-based water-reducing agent and special equipment is applied to the production and preparation process of concrete admixtures for construction and the field of special equipment, and can solve the problems of high surface temperature of the reaction kettle, damage to the service life of equipment, time-consuming steam, and the like. Achieve the effect of reducing hot steam consumption, improving equipment life and improving product quality

Inactive Publication Date: 2007-10-31
河北久强建材有限公司
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Problems solved by technology

This process has the following deficiencies: 1. Since the vapor pressure in the whole process is balanced and consistent, but the temperature required for different processes in the production process is not the same, it is necessary to cool the reactor to adjust the temperature during the production process. , which not only consumes time but also causes a lot of waste of steam; 2. Excessive steam pressure causes the surface temperature of the reactor to be too high, and the product quality is difficult to control; 3. The temperature difference in the jacket of the reactor varies greatly, which is detrimental to the service life of the equ

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  • Preparation method of naphthalene series dehydragent and special equipment thereof

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Embodiment Construction

[0018] The special equipment described in the equipment of the present invention is shown in Figure 1, including special-purpose naphthalene melting reactor 5a, special-purpose sulfonation reactor 5b, special-purpose hydrolysis and condensation reactor 5c, and are sequentially arranged and connected in upper, middle and lower layers; Control valves (8a, 8b) are provided on the connecting pipelines between the melting naphthalene reactor 5a, the sulfonation reactor 5b, and the condensation reactor 5c, thereby transferring materials from top to bottom by gravity. In the specific installation, each special reactor can be placed on different floors, and the floor boards are used to support the reactors at different levels. The special-purpose naphthalene melting reactor 5a can be an ordinary iron reactor, which is low in cost and can fully meet the technological needs. The special sulfonation reaction kettle 5b and the special hydrolysis and condensation reaction kettle 5c can be ...

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Abstract

The invention discloses a preparing method of naphthalene system dehydragent and special equipment, which comprises the following steps: leading vapour with pressure at 0. 5-0. 7MPa into private dissolving naphthalene autoclave jacket; leading vapour with pressure at 0. 4-0. 6MPa into private sulfonated autoclave jacket; leading vapour with pressure at into 0. 2-0. 4MPa into private hydrolysis and condensed autoclave jacket. This invention can increase product quality, decrease energy consumption and can short production circle.

Description

technical field [0001] The invention relates to the production and preparation process of concrete admixture for construction and its special equipment, in particular to the preparation process of cement water reducer and its special equipment. Background technique [0002] In the construction industry, water reducing agents have become an indispensable admixture for high performance concrete. Water reducing agent can greatly reduce the mixing water of concrete, enhance its fluidity and high strength. At present, as far as China is concerned, naphthalene-based superplasticizers account for more than 90% of the total superplasticizers. Naphthalene-based high-efficiency water reducers are usually made of industrial naphthalene as the main raw material, and are produced through melting naphthalene, sulfonation reaction, hydrolysis reaction, and condensation reaction. The existing naphthalene-based high-efficiency water reducer preparation process is generally to first put sol...

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Application Information

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IPC IPC(8): C04B24/22C04B103/30
Inventor 秦景琢仝文增马建立
Owner 河北久强建材有限公司
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