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A kind of circulation device for producing nigrosine

A circulating device and nigrosine technology, applied in the field of dyes, can solve the problems of not fully utilizing the latent heat of the gas phase, wasting heat, etc., and achieve the effects of realizing resource utilization, saving steam costs, and reducing poisoning

Active Publication Date: 2017-01-04
QINGDAO DOUBLE PEACH SPECIALTY CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of an air cooler to condense does not make full use of the gas-phase latent heat of the aniline vapor and water vapor at the top of the tower, resulting in a large amount of wasted heat

Method used

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  • A kind of circulation device for producing nigrosine
  • A kind of circulation device for producing nigrosine
  • A kind of circulation device for producing nigrosine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as image 3As shown, the present embodiment provides a kind of circulation device for producing nigrosine, comprising condensation reactor 16, acidification reactor 17, rectification tower 3, condenser 4 and stratification device 5, wherein, described acidification reaction A centrifuge 18 is connected between the still 17 and the rectifying tower 3; a lithium bromide unit condenser 6 is connected between the described rectifying tower 3 and the described condenser 4, and a lithium bromide unit condenser 6 is arranged on the described lithium bromide unit condenser 6 There are circulating water inlet and circulating water outlet.

[0041] In the present invention, a centrifuge 18 is connected between the acidification reaction kettle 17 and the rectification tower 3, so that the working environment can be adjusted from an open operation to a fully enclosed operation, effectively preventing volatilization of materials and protecting the environment; operating envir...

Embodiment 2

[0057] This embodiment is a further improvement on Embodiment 1. In order to recover the heat of the waste water from the bottom of the rectification tower 3, a heat exchanger 8 is connected to the bottom of the rectification tower 3. The waste water coming out from the bottom of rectification tower 3 contains heat. If it is directly sent to the sewage treatment plant for treatment, this part of heat will be wasted. In the present invention, a heat exchanger 8 is connected to the bottom of the rectification tower 3, so that the waste water at the bottom of the tower first passes through the heat exchanger 8 to collect heat and then enters the sewage treatment plant for treatment, thereby avoiding the waste of heat in the waste water at the bottom of the tower.

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PUM

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Abstract

The invention relates to a circulation device for producing nigrosine, comprising a condensation reaction kettle, an acidification reaction kettle, a rectification tower, a condenser and a layering device, wherein the connection between the acidification reaction kettle and the rectification tower is There is a centrifuge; a lithium bromide unit condenser is connected between the rectifying tower and the condenser, and a circulating water inlet and a circulating water outlet are provided on the lithium bromide unit condenser. The present invention effectively utilizes the gas-phase latent heat of the aniline steam and water vapor at the top of the rectification tower, and uses low-pressure steam to drive the condenser of the lithium bromide unit to generate 7°C water for refrigeration in each workshop, and exchange heat through the reaction kettle jacket or heat exchanger in each workshop It is converted into 12°C water, and then enters the lithium bromide unit condenser to condense to produce 7°C water for recycling, so that the heat at the top of the rectification tower can be comprehensively and effectively utilized, and the economic benefits are obvious. At the same time, the recovered aniline can be used as the raw material of nigrosine and returned to the production process for recycling.

Description

technical field [0001] The invention relates to the technical field of dyes, in particular to a circulation device for producing nigrosine. Background technique [0002] Nigrosine is a chemical dye with strong tinting power, low dispersion, good light absorption and high color stability. Therefore, nigrosine can be used for plastic resin coloring, ink coloring, wood decoration coloring, leather, cotton, linen dyeing And finishing, metal product coloring and paint coloring and other fields. [0003] Wastewater containing aniline will be produced during the production process of nigrosine black. If it is discharged directly, it will cause great harm to the environment and cause waste of resources. In the process of utilizing the rectification tower to extract aniline, the top of the rectification tower will produce aniline vapor and water vapor with a uniform flow rate. In terms of hours, 5310kg of aniline vapor and water vapor will be produced uniformly per hour. This part o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D241/46C09B17/02C07C211/46C07C209/86C02F9/08F25B15/06F25B27/02
CPCY02A30/274Y02B30/625
Inventor 李明陈安源王守满王守恒
Owner QINGDAO DOUBLE PEACH SPECIALTY CHEM GRP