JPS6083Y2 - Refrigerant nozzle for refrigerant direct contact type crystallizer - Google Patents

Description

[Detailed description of the invention] This invention relates to a refrigerant direct contact type crystallizer that directly cools and precipitates a solute in a solution using a refrigerant, and more specifically relates to a refrigerant injection nozzle that blows a refrigerant into a solution. It is.

Caustic soda solutions produced by the diaphragm method contain impurities such as sodium chloride, so they are collected by cooling in a crystal can to precipitate crystals.

In this method, a liquefied refrigerant such as Freon (trade name) is directly blown into the solution through a blowing nozzle, but if the nozzle has a simple structure with holes, crystals will precipitate in the holes and the nozzle will immediately become clogged.

The purpose of this invention is to prevent clogging of the nozzle that blows the refrigerant directly into the solution in a refrigerant direct contact type crystallizer.

This invention is a refrigerant direct contact type crystallizer in which a refrigerant blowing nozzle is provided in a crystal can, a heated fluid passage is provided around the outer periphery of the refrigerant outlet passage of the blowing nozzle, and a heat insulating material is provided around the outer periphery of the blowing nozzle and the heated fluid passage. This is a refrigerant injection nozzle for a refrigerant direct contact type crystallizer.

The embodiments shown in the attached drawings will be described below. 1 is a crystallization can for crystallizing a solution such as caustic soda, 2 is a solution supply pipe 3 is a crystal recovery port, 4 is a blowing nozzle for a liquefied refrigerant such as fluorocarbon,
5 is an outlet for the evaporating refrigerant, and the refrigerant is sucked through the outlet 5, condensed by a suitable condensing device (not shown), and circulated to the blowing nozzle 4.

The blowing nozzle 4 is formed in a ring shape, has a plurality of refrigerant outlet passages 5 on its upper surface, and has a heated fluid passage 6 for steam or the like on the outer periphery of the coolant outlet passage 5. A heat insulating material 7 is provided around the outer periphery of 4.

In the figure, 8 is a heating fluid control valve, 9 is an outer pipe for isolating the heat insulating material 7 provided on the outer periphery of the blowing nozzle 4 from the solution, and 10 is also for separating the heat insulating material 7 provided on the outer periphery of the heated fluid passage into the solution. It is an outer tube that separates the

In use, heating fluid flows through the heating fluid passage 6 constantly or intermittently.

Since the refrigerant outlet passage 5 is heated by the heating fluid, the crystals crystallized near the outlet of the refrigerant outlet passage 5 are heated by the heating fluid and melted again, so that the outlet is not blocked.

As explained above, in this invention, the heated fluid passage is provided around the outer periphery of the refrigerant outlet passage, so that the outlet is not blocked by crystallization.

Further, since the outer periphery of the heating fluid passage and the outer periphery of the blowing nozzle are covered with a heat insulating material, the refrigerant and the heating fluid can be insulated from the solution.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of this invention, and FIG. 2 is a plan view showing the main part of FIG. 1. 1... Crystal can, 4... Refrigerant blowing nozzle, 5... Refrigerant outlet passage, 6... Heating fluid passage 7... Heat insulation Material.

Claims (1)

[Scope of utility model registration request] A refrigerant direct contact type crystallizer having a refrigerant blowing nozzle provided in a crystal can, wherein a heated fluid passage is provided on the outer periphery of the refrigerant outlet passage of the blowing nozzle, and a heat insulating material is provided on the outer periphery of the blowing nozzle and the heated fluid passage. Refrigerant nozzle for direct contact crystallizer.