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Purification device and purification process for waste salt in by-product of glyphosate

A technology for purification equipment and by-products, applied in the purification of alkali metal halides, etc., can solve problems such as high processing costs, unsustainable development models, and consumption, and achieve the effect of improving economic benefits

Active Publication Date: 2014-10-15
HUBEI TAISHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method consumes more fuel, and the processing cost is very high. At the same time, this method can only be regarded as temporary storage rather than processing, and the immediate problem will be postponed.
As time continues to grow, companies will consume more funds and land to temporarily store more and more waste salt. This method is an unsustainable development model

Method used

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  • Purification device and purification process for waste salt in by-product of glyphosate
  • Purification device and purification process for waste salt in by-product of glyphosate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A device for purifying waste salt from glyphosate by-products. The bottom of the salt washing tank 1-1 is connected to the slurry pump 2-1 through a line pipeline, and then connected to the centrifuge 3-1. The centrifuge 3-1 is then re- It is connected to the upper part of the salt washing tank 1-2; the bottom of the salt washing tank 1-2 is connected to the slurry pump 2-2 through the pipeline and then connected to the centrifuge 3-2, and the centrifuge 3-2 is connected to the salt washing tank through the pipeline The upper part of 1-3 is connected; the bottom of the salt washing tank 1-3 is connected with the slurry pump 2-3 through the pipeline and then connected with the centrifuge 3-3, and the centrifuge 3-3 is connected with the salt tank 4 through the pipeline, and the bottom of the salt tank The end is connected with the brine delivery pump 5 through the line pipeline.

[0025] The hot pure water pipe is arranged on the salt-dissolving tank 4, and the cold wate...

Embodiment 2

[0029] ① Mother liquor evaporation and centrifugation: the glyphosate mother liquor is pumped to the evaporation system, and the flow rate is controlled to 25m 3 / h, after being distilled by the MVR system, the concentrated brine enters the centrifuge, which can produce 3-4 tons of waste salt per hour.

[0030] ②Waste salt washing and purification: the waste salt from the evaporation system enters the 1-1 salt washing tank through the scraper conveyor,

[0031] Mix it with the water from the upper centrifuge to form a salt slurry with a solid content of 25. After stirring evenly, pump it into the first centrifuge with a slurry pump. The centrifuged solid salt enters the salt washing tank 1-2, and the brine returns Wash salt tank 1-1. Adopt the same method, obtain 3 tons of refined salt after the purification after three stages of washing, its solid content rate is 60%.

[0032] ③ Refined salt dissolution: The refined salt from the centrifuge 3-3 is transported to the salt ta...

Embodiment 3

[0035] 1) Put the solid waste salt obtained by evaporation and centrifugation from the glyphosate mother liquor into the salt washing tank 1-1, pump pure water into the salt washing tank 1-3, and the pure water overflows into the washing salt tank 1-3 In the salt tank 1-2, and then overflow into the salt washing tank 1-1, control the amount of pure water added in the salt washing tank 1-3 to the coarse salt slurry with a waste salt solid content rate of 30%, and start the salt washing The stirring paddle in the tank 1-1, at a stirring rate of 20r / min and a stirring time of 30min, prepares a salt slurry, which is pumped into the centrifuge 3-1 through the slurry pump 2-1, and after centrifugal dehydration Get solid salt.

[0036] 2) Send the solid salt in step 1) to the salt washing tank 1-2) and pump pure water into the salt washing tank 1-3, and the pure water overflows through the salt washing tank 1-3 and flows into the salt washing tank 1-2 In the salt washing tank 1-2, t...

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Abstract

The invention relates to a purification device of waste salt in a by-product of plyphosate. A first-stage salt cleaning tank is connected with a first-stage slurry pump through route pipelines first, then the first-stage slurry pump is connected with a first-stage centrifuge; the first-stage centrifuge is connected with a second-stage salt cleaning tank through the route pipelines; after three stages of circulating connection of the salt cleaning tanks, the slurry pumps and the centrifuges, a three-stage centrifuge is connected with a salt melting tank through the route pipelines, and the salt melting tank is connected with a salt water delivery pump. The waste salt from an evaporation system is conveyed to the first-stage salt cleaning tank, and mixed with water obtained from the centrifuge of the previous stage to obtain salt slurry with the solid content rate of 25%; after being uniformly stirred, the salt slurry is pumped into the first-stage centrifuge utilizing the first-stage slurry pump; the centrifuged solid salt is conveyed to the second-stage salt cleaning tank, and the salt cleaning water returns to the second-stage salt cleaning tank. The purified refined salt cleaned through three stages adopting the same method has the solid content rate of 60-70%; through the adoption of the process, waste salt is converted into raw materials capable of being used in the downstream chlor-alkali industry, and improves the economic benefit of waste salt treatment; meanwhile, in virtue of great raw material demand in the chlor-alkali industry, the defects of narrow application range and small demand for the conventional waste salt are completely overcome.

Description

technical field [0001] The invention relates to a purification device for waste salt in glyphosate by-products, and uses the device to purify waste salt, belonging to the chemical industry field of glyphosate production. Background technique [0002] Glyphosate is an excellent organophosphorus non-selective herbicide. It is a high-efficiency, low-toxicity, low-residue, and broad-spectrum herbicide. Mengye is one of the most competitive herbicide varieties in the market. At present, this variety is rising rapidly with the large-scale promotion of transgenic crops around the world. [0003] China is currently the world's largest producer and exporter of glyphosate. In 2013, the national output of glyphosate reached 800,000 tons. In the waste water produced in the production of glyphosate, sodium chloride is an important component. The average sodium chloride content in 1 ton of mother liquor is 15%, and the production of 1 ton of glyphosate will produce 6 tons of waste water....

Claims

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Application Information

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IPC IPC(8): C01D3/14
Inventor 韩翼覃立忠王瑞宝
Owner HUBEI TAISHENG CHEM
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