A kind of heating device and heating method for asphalt in asphalt well

Abstract

The invention discloses a heating method for asphalt in an asphalt well. The bottom end of an electric heating element is inserted into the asphalt; as the electric heating element radiates heat, the asphalt being contact with the electric heating element is softened and flows; at the moment, the electric heating element is controlled to be inserted into the asphalt well through an operating rod until the electric element reaches to the required buried depth; the operating rod is fixed; the electric heating element is kept to be heated in the buried depth until all of the asphalt above the buried depth are heated to the target temperature; after the heating process is completed, the electric heating element is pulled out of the asphalt well gradually through the operating rod, so that the liquid level of the asphalt in the asphalt is lowered; the asphalt well is supplemented with the asphalt. According to the heating method, the asphalt in the asphalt well can be heated effectively under the condition that a heating electrode is out of operation; the heating temperature is controlled well so as to prevent danger. The invention further discloses a heating device, adopting the heating method, for the asphalt in the asphalt well.

Description

technical field [0001] The invention relates to a heating process, in particular to a structure and method for heating asphalt in a dam asphalt well to a softened and flowing state. Background technique [0002] Asphalt wells are usually used as water stops in the transverse joints of the dam body. After many years of water storage and operation since the completion of the dam, the asphalt in the asphalt wells has gradually aged, and there have been various degrees of asphalt leakage and water seepage. In order to ensure the normal operation of the dam expansion joint water stop system, it is necessary to treat the aged asphalt. When the asphalt is insufficient, supplementary irrigation should be carried out, and the aging of the asphalt should be replaced in time. No matter what treatment method is used, it is necessary to heat and soften the original asphalt to a fluid state, and at the same time, it is required to control the temperature during the heating process to en...

AI Technical Summary

Problems solved by technology

The steam heating method is to control the heating temperature by controlling the temperature of the steam to ensure that the local temperature of the asphalt will not be too high during heating. However, when using a steam system for heating, it is necessary to pass the steam pipe into the asphalt well. During the heating process, if the temperature is not properly controlled If the steam pipeline leaks, a large amount of water will be mixed into the asphalt well, which will further affect the normal use of the asphalt well.

The electric heating method is to pass the electric heating element into the asphalt well, and use the self-radiation of the electric heating element to heat the asphalt. The electric heating method has the advantages of fast heating speed and high heating efficiency, but in the heating process, the temperature control is adopted. Manually measure the temperature regularly, and then adjust the current flowing through the electric heating element according to the measured temperature to control the temperature. The temperature fluctuation is relatively large. At the same time, during the heating process, the water in the well evaporates and bubbles appear. rise, there are certain security risks

In addition, the wellhead of the asphalt well is small and the depth is deep, so it is difficult for steam pipes or electric heating elements to pass into the asphalt well during actual construction

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