Sodium bichromate concentration and crystallization equipment and technology

A technology of concentrated crystallization and sodium alumite, applied in the direction of solution crystallization, chromate/dichromate, etc., can solve the problems of increased evaporator efficiency, increased energy consumption, increased operating costs, etc., and achieves compact structure and energy saving. , the effect of convenient operation

Active Publication Date: 2013-12-18
深圳市捷晶科技股份有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to continuously provide fresh steam, so there are the following defects: 1. Due to the continuous supply of a large amount of raw steam, the operating

Method used

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  • Sodium bichromate concentration and crystallization equipment and technology

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Embodiment 1

[0034] Such as figure 1 Shown, the concentrated crystallization equipment of sodium red alum of the present invention, it comprises compression evaporator, two-effect evaporator and crystallization separation device;

[0035] The compression evaporation device includes a buffer adjustment tank 1, a first preheater 2, a second preheater 3, an evaporator 5, a separator 6 and a steam compressor 8, and also includes a cooling water tank 9; the buffer adjustment tank 1. The first preheater 3, the second preheater 4, and the evaporator 5 are connected sequentially through the infusion pipe, and a feed pump 2 is provided on the infusion pipe section between the buffer adjustment tank 1 and the first preheater 3; The steam outlet of the device 6 is connected to the air inlet of the steam compressor 8 through a gas delivery pipe, and the gas outlet of the steam compressor 8 is communicated with the evaporator 5, and the condensed water outlet of the evaporator 5 is connected to the coo...

Embodiment 2

[0039] On the basis of the above solution, the outlet of the cooling water tank 9 is connected to the condensate pump 10 , and the outlet of the condensate pump 10 is connected to the second preheater 4 .

Embodiment 3

[0041] As another embodiment of the present invention, on the basis of Embodiment 1 or Embodiment 2, a condensate water pump 20 is provided on the water delivery pipe between the second effect evaporator 18 and the first preheater 3 .

[0042]

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Abstract

The invention discloses sodium bichromate concentration and crystallization equipment and a technology. The sodium bichromate concentration and crystallization equipment comprises a compression evaporation device, a two-effect evaporation device and a crystallization separation device. The technology comprises the steps of recompression evaporation of steam, first-effect evaporation of concentrated liquor, second-effect evaporation of concentrated liquor, crystallization separation of sodium bichromate and the like. The structure of the equipment disclosed by the invention is simplified; a steam recompression evaporation part makes use of a recycling function of the equipment, and extra steam is not needed; a two-effect evaporation part makes use of a steam spraying pump, so that the energy consumption and the operation cost are further reduced. According to the technology disclosed by the invention, through segment type evaporation compression and crystallization, the energy consumption and the cost of a sodium bichromate treatment process are reduced by cyclic pressurization of the equipment.

Description

[0001] technical field [0002] The invention relates to the technical field of concentration and crystallization of solutions, in particular to equipment and technology for concentration and crystallization of sodium red alum. [0003] Background technique [0004] Nowadays, with the increasingly tense energy and environmental situation, energy conservation and emission reduction have attracted more and more attention from the society, government, and enterprises, and some energy and environmental policies have been issued one after another. [0005] Sodium dichromate is a hydrous crystal of sodium dichromate. At present, known sodium dichromate solutions are mostly treated with single-effect or multiple-effect evaporation. This method needs to continuously provide fresh steam, so there are the following defects: 1. Due to the continuous supply of a large amount of raw steam, the operating cost and energy consumption are increased; 2. The evaporator efficiency required by ...

Claims

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Application Information

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IPC IPC(8): B01D9/02C01G37/14
Inventor 代超刘正建杨克叶翔李嘉豪段旭斌
Owner 深圳市捷晶科技股份有限公司
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