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A kind of device and method for recovering nitrocellulose residual acid

A technology of nitrocellulose and residual acid, which is applied in the field of recovery of nitrocellulose residual acid and recovery of nitrocellulose residual acid, can solve the problem of high residual acidity of acid cotton, and achieve simple operation, stable output and high safety Effect

Active Publication Date: 2022-08-05
SICHUAN NITROCELLULOSE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a device for reclaiming nitrocellulose residual acid, which solves the problem of high residual acidity of acid cotton in the prior art

Method used

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  • A kind of device and method for recovering nitrocellulose residual acid

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Embodiment Construction

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] A device for recovering nitrocellulose residual acid, such as figure 1 As shown, it includes a centrifuge 1 and a vacuum washing filter 2. The screen frame of the centrifuge 1 includes a high-concentration waste acid separation section and a replacement washing section. From the end of the sieve frame to the front, it is set as the fourth stage of acid, the third stage of acid, and the second stage of acid, and the outlet of the fourth stage of acid, the third stage of acid, and the second stage of acid are correspondingly connected with the fourth stage of acid collection tank 4 and the third stage of acid collection tank 5. , acid two-stage collecting tank 6, acid four-stage collecting tank 4, acid three-stage collecting tank 5 are respectively communicated with acid three-stage and acid two-stage through the first spray pipe 7 and the...

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Abstract

The invention discloses a device and method for recovering nitrocellulose residual acid. There is an acid first-stage collection tank connected, and three-stage replacement washing sections are set in the centrifuge, and four-stage replacement washing sections are set in the vacuum washing filter. Residual acid content in nitrocellulose dropped to 5%.

Description

technical field [0001] The invention belongs to the technical field of acid cotton separation equipment, relates to a device for recovering nitrocellulose residual acid, and also relates to a method for recovering nitrocellulose residual acid by utilizing the device. Background technique [0002] Nitrocellulose is mainly produced by reacting nitrosulfur mixed acid with cellulose. The reacted nitrocellulose should be separated from acid cotton. If there is a large amount of residual acid in the cotton, this part of the acid will be directly discharged after washing, which will increase the cost of wastewater and The total nitrogen in wastewater has been increased, and the total nitrogen in wastewater has been required to reach below 15mg / L in some domestic provinces and cities. Excessive acidity in cotton has the following problems: 1. The cost of residual acid in the wastewater in the post-process treatment increases, and the nitrate in the wastewater is greatly increased. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B5/04
CPCC08B5/04
Inventor 张雪峰李路兵张仁旭张强朱华范永茂辛军辉何建军吴世佳
Owner SICHUAN NITROCELLULOSE CORP