Heating method adopting hybrid heating nozzle

Abstract

The invention discloses a heating method adopting a hybrid heating nozzle. A part assembly for implementing the method comprises a joint flange, a steam connecting pipe, a steam nozzle upper part body, a steam nozzle lower part body, a steam nozzle lower part plugging cap and a blowdown screw plug, wherein the joint flange is connected with the steam connecting pipe; the steam connecting pipe is connected with the steam nozzle upper part body; the steam nozzle upper part body is connected with the steam nozzle lower part body; the steam nozzle lower part body is connected with the steam nozzle lower part plugging cap; the steam nozzle lower part plugging cap is connected with the blowdown screw plug. The method comprises the steps that auxiliary machine heating steam enters the steam connecting pipe from the joint flange, then enters a steam buffer cavity formed by connecting and combining the steam nozzle upper part body, the steam nozzle lower part body and the steam nozzle lower part plugging cap, then is jetted out via 16 steam jet holes formed in the steam buffer cavity in a staggered and crossing manner and carries out phase change heat transfer quickly around the nozzle, so that the steam and preheated cold water exchange heat and are mixed fully and quickly and form an ascending force. The part assembly has the characteristics of simple and reasonable structure, easiness in processing, quickness in heat exchange between steam and water, good work environment, safety and reliability.

Description

technical field [0001] The invention relates to a heat mixing nozzle heating method, in particular to a steam spray mixing device suitable for steam and water direct mixing heating devices in thermal power plants. Background technique [0002] Air preheaters, economizers, flue gas waste heat recovery heaters and other devices in thermal power plants are often brewed with hot water solution to remove dirt attached to the surface of the heat transfer medium during operation, and then rinsed with clean water. In order to achieve the best cleaning effect, the temperature of the cleaning water is between 70°C and 80°C, and the hot water heating uses the low-pressure steam of the auxiliary machine to directly heat the aqueous solution. That is, the main pipe and the branch pipe steam are directly sprayed into the cold water for mixed heating. This extensive method often results in uneven heating. During the heating process, the noise is loud when the steam and water are mixed, and...

AI Technical Summary

Problems solved by technology

That is, the main pipe and the branch pipe steam are directly sprayed into the cold water for mixed heating. This extensive method often results in uneven heating, loud noise when the steam and water are mixed during the heating process, and strong water flow vibration. These defects greatly affect the cleaning effect and efficiency. Even It may lead to major accidents such as cleaning is not as good as not cleaning

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