A roller cooling structure of a flake alkali machine

Abstract

The utility model provides a kind of roll cooling structure of flake caustic soda machine, belong to flake caustic soda preparation technical field.The roll cooling structure of flake caustic soda machine includes: roll body and metal support cylinder;The metal support cylinder is cooperatively arranged in the roll body;From the vicinity of the starting position point of the alkali liquor liquid level that the appropriate sodium hydroxide film is attached to the surface of the roll body and leaves molten state, to the vicinity of the first termination position point of sodium hydroxide film being scraped into flake caustic soda by scraper, corresponding the inner wall of the metal support cylinder is spaced apart and is provided with a plurality of cooling temperature regulating components along its length direction;Each cooling temperature regulating component has temperature regulating medium, and the temperature regulating medium is air or high-boiling oil;From the vicinity of starting position point, to the vicinity of first termination position point, the temperature of temperature regulating medium in cooling temperature regulating component gradually reduces.In the utility model, the temperature fluctuation range of the vicinity of alkali liquor liquid level in molten state is smaller, and flake caustic soda cannot be hygroscopic and damp.

Claims

1. A drum cooling structure for a caustic soda flake machine, characterized in that, include: Roller body, A metal support cylinder is fitted inside the drum body and remains stationary, while the drum body rotates around the metal support cylinder. From the point near the starting position where a suitable amount of sodium hydroxide film adheres to the surface of the drum body and leaves the molten alkali solution, to the point near the first ending position where the sodium hydroxide film is scraped into flakes by a scraper, multiple cooling and temperature-regulating components are spaced along the length of the inner wall of the corresponding metal support cylinder. Each cooling and temperature-regulating component contains a temperature-regulating medium, which is air or high-boiling-point oil. From the point near the starting position to the point near the first ending position, the temperature of the temperature-regulating medium within the cooling and temperature-regulating component gradually decreases.

2. The roll down temperature structure of a sheet alkali machine according to claim 1, wherein, The cooling and temperature regulation component includes: The buffer cavity is hollow inside and closed at both ends, and is arranged in surface contact with the inner wall of the metal support cylinder; the buffer cavity is provided with a medium outlet; A distribution pipe is disposed within the buffer cavity along its length and has several distribution holes. The distribution pipe is also connected to a medium inlet pipe. The other end of the medium inlet pipe extends outside the buffer cavity. The temperature-regulating medium enters the distribution pipe from the medium inlet pipe and is released into the buffer cavity.

3. The roll down temperature structure of a sheet alkali machine according to claim 2, wherein, The area where the metal support cylinder contacts the buffer cavity surface is completely or partially hollowed out.

4. The roll down temperature structure of a sheet alkali machine according to claim 3, wherein A sealing ring is embedded on the outer wall of the metal support cylinder corresponding to the area where the metal support cylinder contacts the surface of each buffer cavity.

5. The roll down cooling structure of a sheet alkali machine according to claim 4, wherein The opening direction of at least one row of the distribution holes on the distribution pipe along its own length direction is the radial direction of the roller body.

6. The roll down temperature structure of a sheet alkali machine according to claim 1, wherein, The cooling and temperature regulation component includes: The buffer cavity is hollow inside and closed at both ends, and is arranged in surface contact with the inner wall of the metal support cylinder; the buffer cavity has a medium injection port, through which the temperature-regulating medium is injected into the buffer cavity; the volume of the temperature-regulating medium is 50-95% of the volume of the buffer cavity; A finned heat exchange tube is disposed within the buffer cavity along its length. The finned heat exchange tube is also connected to a coolant inlet / outlet pipe. The other end of the coolant inlet / outlet pipe extends outside the buffer cavity. Coolant enters the finned heat exchange tube from the inlet / outlet pipe and exchanges heat with the temperature regulating medium.

7. The roll down cooling structure of a sheet alkali machine according to claim 6, wherein The area where the metal support cylinder contacts the buffer cavity surface is completely or partially hollowed out.

8. The roll down temperature structure of a sheet alkali machine according to claim 7, wherein, A sealing ring is embedded on the outer wall of the metal support cylinder corresponding to the area where the metal support cylinder contacts the surface of each buffer cavity.

9. The roll down cooling structure of a sheet alkali machine according to any one of claims 1 to 8, characterized in that, From near the first termination point where the sodium hydroxide film is scraped into flakes by a scraper, to near the second termination point where the roller body is spun into the molten alkali solution, several heating and temperature-regulating components are also spaced apart on the inner wall of the corresponding metal support cylinder; each heating and temperature-regulating component also contains the temperature-regulating medium; from near the first termination point to near the second termination point, the temperature of the temperature-regulating medium in the heating and temperature-regulating component gradually increases.

10. The drum cooling structure of the caustic soda flake machine according to claim 9, characterized in that, The temperature-increasing temperature-control component and the temperature-decreasing temperature-control component are of the same structure. The temperature-increasing temperature-control component and the temperature-decreasing temperature-control component are of the same structure.

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