Modified asphalt coiled material batching device

Abstract

The invention relates to a modified asphalt coiled material production batching device which comprises a modified asphalt reaction kettle with a preheating system and a dispersion stirring device, the modified asphalt reaction kettle comprises an asphalt preheating system, a powder modifier submerged charging system, a metering system, a modified asphalt reaction kettle dispersing and stirring system, a modified asphalt reaction kettle temperature control system, a colloid mill and a single-tank circulating pipeline. The device has the following advantages: after asphalt is preheated in a graded manner by using the rapid preheating system, the asphalt is pumped to the modified asphalt reaction kettle through the heat preservation pipeline, so that the traditional secondary heating time is effectively shortened; the powder modifier under-liquid feeding system is adopted, so that the risks of high viscosity dispersion difficulty caused by traditional over-liquid feeding and safety accidents caused by the fact that the modifier is ignited by high-temperature gas are thoroughly solved; and a multi-time circulating grinding mode is adopted to replace a traditional production process of singly heating the swelling modifier, so that the material aging degree caused by high temperature is greatly delayed, and the production batching efficiency is improved.

Description

technical field [0001] The invention belongs to the field of batching production equipment, and more specifically relates to a batching device for production of modified asphalt coils. Background technique [0002] Polymer modified bitumen waterproofing membrane uses polyester tire, glass fiber tire or glass fiber reinforced polyester tire as the carcass reinforcement layer, and high molecular polymer materials (mainly SBS, SBR, etc.) as the main modifier At the same time, with other secondary modifiers, the asphalt is modified and processed to form a coating material, and the polyethylene film or flake and granular mineral materials are used as the covering material to make a rollable sheet waterproof material. In the traditional production batching process, different raw materials are added in stages according to the design requirements. Among them, the asphalt is heated in a large storage tank and then injected into the modified asphalt reactor through the insulation pip...

AI Technical Summary

Problems solved by technology

The shortcomings of the traditional production process are as follows: 1. Because long-term high-temperature heating (greater than 140°C) will aggravate the aging of asphalt, in the actual production process, it is enough to store large tanks of asphalt and heat it to a flowable state, and then measure it through the pipeline according to requirements. Imported into the reactor, and then further heated to raise the temperature, so there is a secondary heating process

2. Because various modifiers are added to the reactor at normal temperature, it will cause heat exchange and cooling of the asphalt that has reached the process temperature during the mixing process of the modifier and asphalt

At the same time, cooling will increase the viscosity of asphalt, and the mixture of modifier and asphalt will heat up again. Because the specific heat capacity of the mixture increases, the heating rate is slower than that of pure asphalt, and it takes longer. Disadvantages of long batching time

3. The low temperature of the mixture will also lead to adverse phenomena such as agglomeration and difficulty in dispersion during the swelling process of the modifier

In the process of using the traditional paddle-type stirring, when the viscosity of the modified material increases, the driving effect of the mixture between the paddle layers is poor, and the swelling effect of the modifier is uneven; When the modified material close to the wall of the reactor is enlarged, it basically stops moving because it cannot be driven by stirring, which leads to the defect that the swelling effect of the modifier at the center of the reactor is inconsistent with that at the wall of the reactor

6. The batching modifier in conventional production is combined with asphalt in the modified asphalt reactor, mainly relying on the shearing of the stirring paddle and the heating of the tank to make it swell, with low efficiency and poor swelling effect

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