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Eluting device and separation method for nitric acid type tin-stripping waste liquid

A technology of elution device and waste liquid, applied in chemical instruments and methods, metallurgical wastewater treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problems of secondary pollution, low efficiency of distillation physical methods, etc.

Active Publication Date: 2016-03-30
JIANGSU WANHE COATING MACHINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies provide a solution to certain aspects of resources recovered from waste tin stripping solutions. However, such as chemical methods and product transfer methods are likely to cause secondary pollution, and general electrolysis and distillation physical methods have low efficiency and other defects.

Method used

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  • Eluting device and separation method for nitric acid type tin-stripping waste liquid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 1 , an eluting device for nitric acid type tin stripping waste liquid includes a constant temperature condensation fractionator 100 , a collection tank 200 , a constant temperature distiller 300 , an elution tank 400 and a drying fluidized bed 600 .

[0035] The thermostatic distiller 300 is provided with an eluent inlet 303 , a heater 301 , a steam outlet and a liquid outlet 306 at the lower part.

[0036] The elution tank 400 is provided with a porous carrier plate 403, and the porous carrier separates the inside of the elution tank 400 into a vapor buffer chamber 402 and an elution chamber 404. The steam outlet of the elution chamber 404 is located on the porous carrier plate 403, the elution chamber 404 is provided with a waste liquid inlet 401, and a liquid separation communication pipe 304 is provided between the elution chamber 404 and the constant temperature distiller 300, and the elution The lower part of the chamber 404 communicates with the dryi...

Embodiment 2

[0055] The main technical solution of this embodiment is basically the same as that of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here. A kind of separation method of nitric acid type tin stripping waste liquid is as follows:

[0056] Open the sample inlet of thermostatic distiller 300, 200L thermostatic distiller 300 is filled with ethanol eluent, inject 100L nitric acid type tin stripping waste liquid into sample pipe pipeline, the total tin content of this tin stripping waste liquid is 131.5g / L, Cu 2+ The concentration is 17.4g / L, start to heat the constant temperature still 300, and control the temperature in the still to be 85°C, so that ethanol vapor is injected into the elution tank 400 from the pipeline through the one-way valve piston 302, and the hot steam is the elution tank 400 After half an hour, the collection tank 200 began to have droplets, and the liquid level of the connecting pipel...

Embodiment 3

[0059] The main technical solution of this embodiment is basically the same as that of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here. A separation method for nitric acid-type tin stripping waste liquid. In step (2), the temperature in the distiller is controlled to be 75°C, and the temperature of the lower part of the constant temperature condensation fractionator 100 is controlled to be 75°C.

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Abstract

The invention discloses an eluting device for a nitric acid type tin-stripping waste liquid. The eluting device comprises a constant-temperature condensation fractionator, a collecting tank, a constant-temperature distiller, an eluting tank and a drying fluidized bed, wherein the constant-temperature distiller is provided with an eluent sample inlet, a heater and a steam outlet, the inside of the eluting tank is divided into a steam buffer chamber and an eluting chamber by a porous support, and the steam buffer chamber is formed in the lower part of the eluting tank and communicated with the steam outlet of the constant-temperature distiller; the eluting chamber is formed above the porous support, the lower part of the eluting chamber is communicated with the drying fluidized bed, and a gas outlet of the drying fluidized bed is communicated with the constant-temperature distiller; an exhaust chamber is communicated with the constant-temperature condensation fractionator which is communicated with the collecting tank. According to a separation method of the nitric acid type tin-stripping waste liquid, on the basis of the characteristic of immiscibility of ethanol and stannic acid, stannic acid, nitrate and a dilute nitric acid solution are separated in a sealed circulating elution system under the actions of eluting separation, evaporative crystallization, cooling fractionation and hot air drying, and meanwhile, recycling of an eluent, namely, ethanol, is guaranteed.

Description

technical field [0001] The invention relates to the technical field of recycling tin stripping waste liquid, in particular to an eluting device and a separation method for nitric acid type tin stripping waste liquid. Background technique [0002] With the development of the PCB manufacturing industry, although new processes such as additive methods appear in the graphic transfer process, such as using conductive ink to print graphics and then electroplating, the conductive ink used in this method needs to add a large amount of precious metals and can only be used in Printing on the substrate surface, the bonding force is not particularly high, the cost is high, the reliability is poor, and the hole copper processing is difficult. Therefore, the subtractive method is still the main method for graphic realization. When the circuit board design requires high-density wiring, small conductor spacing, back-drilling, and high alignment accuracy, the positive process is generally de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/02C02F11/16C23F1/46C02F101/20C02F103/16
CPCC02F1/02C02F1/04C02F11/16C02F2101/20C02F2103/16C23F1/46
Inventor 潘湛昌范红胡光辉肖楚民
Owner JIANGSU WANHE COATING MACHINE CO LTD
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