CN211111064U

CN211111064U - Alkyl ester method glyphosate byproduct phosphate refining plant

Info

Publication number: CN211111064U
Application number: CN201922052657.3U
Authority: CN
Inventors: 曾世刘; 杨磊; 胡波; 徐森军
Original assignee: Inner Mongolia Xingfa Technology Co ltd
Current assignee: Inner Mongolia Xingfa Technology Co ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-07-28
Anticipated expiration: 2029-11-25

Abstract

The utility model belongs to alkyl ester method glyphosate byproduct phosphate refining plant, concretely relates to used device of the refining process of the solid material that obtains after the mother liquor burns in the alkyl ester method glyphosate production process. The solid waste material feeding pipe is connected with the primary refining tank, the upper part of the primary refining tank is connected with the top of the secondary refining tank, and the upper part of the secondary refining tank is connected with the top of the tertiary refining tank; the bottom of the third-stage refining tank is connected with the top of the second-stage refining tank through a first submerged pump, and the bottom of the second-stage refining tank is connected with the top of the first-stage refining tank through a second submerged pump. A steam bubbler is arranged in the primary refining tank, and the bottom of the primary refining tank is connected to a combustion furnace through a third submerged pump; a first circulating water coil is arranged in the second-stage refining tank, and a second circulating water coil is arranged in the third-stage refining tank. The solid material obtained by burning the mother liquor generated in the glyphosate production process is refined to obtain the sodium pyrophosphate product with the purity of 99 percent, thereby ensuring the purity of the product and improving the added value of the product.

Description

Alkyl ester method glyphosate byproduct phosphate refining plant

Technical Field

The utility model belongs to a byproduct phosphate refining plant in alkyl ester method glyphosate production process, which belongs to the field of chemical equipment.

Background

The yield of glyphosate in the synthesis process of glyphosate by alkyl ester method is generally between 75% and 80%, so the glyphosate mother liquor after separating glyphosate wet powder contains a large amount of phosphorus element, the part of phosphorus element mainly exists in organic states of glyphosate, N-phosphonomethyl iminodiacetic acid or methyl phosphite and the like, but a certain amount of phosphorus element exists in the form of inorganic phosphate, in order to fully recover the part of phosphorus element, high-temperature incineration technology is mainly adopted at home and abroad to strive to oxidize the phosphorus element in the mother liquor into single inorganic phosphate, and finally, the phosphorus element is uniformly recovered. Because the mother liquor is rich in impurity elements such as sodium, chlorine, carbon, nitrogen and the like, the organic matters can be fully degraded under the premise of guaranteeing the temperature and the reaction time by directly burning, but the organic matters are influenced by the impurity elements and are difficult to form single phosphate, in the solid material obtained after the glyphosate mother liquor is treated by a test and burning method, the content of sodium pyrophosphate is 30-37%, the content of other phosphates is 25-29%, the content of sodium chloride is 24-28%, the rest 10% is sodium carbonate, the purity of the product is not high, so that the sale of the product is greatly disturbed, and the added value of the product is caused.

Disclosure of Invention

To the problem that exists, the utility model provides an alkyl ester method glyphosate byproduct phosphate device technique can effectually burn the phosphate that the in-process produced with the glyphosate mother liquor and refine the processing, dispels impurity wherein, finally obtains single phosphate product to the purity of product has been ensured more than 99%.

In order to realize the purpose of the utility model, the following technical proposal is adopted:

a device for refining glyphosate byproduct phosphate by alkyl ester method, a solid waste material feeding pipe is connected with a primary refining tank, the upper part of the primary refining tank is connected with the top of a secondary refining tank, and the upper part of the secondary refining tank is connected with the top of a tertiary refining tank; the bottom of the third-stage refining tank is connected with the top of the second-stage refining tank through a first submerged pump, and the bottom of the second-stage refining tank is connected with the top of the first-stage refining tank through a second submerged pump.

A steam bubbler is arranged in the primary refining tank, and the bottom of the primary refining tank is connected to a combustion furnace through a third submerged pump; a first circulating water coil is arranged in the second-stage refining tank, and a second circulating water coil is arranged in the third-stage refining tank.

And a flake caustic soda inlet pipeline is arranged in the third-stage refining tank.

The utility model discloses a model of each device is as follows:

adopt the technical scheme of the utility model provides a refined device of alkyl ester method glyphosate byproduct phosphate has ensured that the solid material that the glyphosate mother liquor burns the in-process and produces refines, has obtained the sodium pyrophosphate product that purity is up to 99%, has improved the added value of product.

Drawings

Fig. 1 is a device for refining a byproduct phosphate of glyphosate by an alkyl ester method, wherein 1 is a solid waste feeding pipe, 2 is a primary refining tank, 3 is a secondary refining tank, 4 is a tertiary refining tank, 5 is a submerged pump I, 6 is a submerged pump II, 7 is a steam bubbler, 8 is a circulating water coil I, 9 is a circulating water coil II, and 10 is a flake caustic soda feeding pipeline.

Detailed Description

A solid waste material feeding pipe 1 is connected with a first-stage refining tank 2, the upper part of the first-stage refining tank 2 is connected with the top of a second-stage refining tank 3, and the upper part of the second-stage refining tank 3 is connected with the top of a third-stage refining tank 4;

the bottom of the third-stage refining tank 4 is connected with the top of the second-stage refining tank 3 through a first submerged pump 5, and the bottom of the second-stage refining tank 3 is connected with the top of the first-stage refining tank 2 through a second submerged pump 6.

A steam bubbler 7 is arranged in the primary refining tank 2, and the bottom of the primary refining tank 2 is connected to a combustion furnace through a third submerged pump 11; a first circulating water coil 8 is arranged in the second-stage refining tank 3, and a second circulating water coil 9 is arranged in the third-stage refining tank 4.

A flake caustic soda inlet pipeline 10 is arranged in the third-stage refining tank 4.

Crushing the solid material generated by incineration by a crusher to powder with the particle size of less than 5mm, putting the powder into a primary refining tank, dissolving the solid powder by using a solution for one time, controlling the ratio of the solid adding amount to the solution adding amount to be about 1:5, arranging a steam bubbler in the refining tank, controlling the liquid temperature (55-70 ℃) in the tank by using the steam bubbler, and playing a role in stirring and assisting in dissolving. The overflow solution at the top of the first-stage refining tank directly enters a second-stage refining tank, a circulating water coil is arranged in the second-stage refining tank, the temperature of the solution in the tank is controlled to be 35-40 ℃, the overflow at the top of the second-stage refining tank directly enters a third-stage refining tank, and the bottom material is pumped into the first-stage refining tank through a submerged pump to be used as the solution for dissolving solids. The third-stage refining tank is also internally provided with a circulating water coil pipe, the temperature of the solution in the tank is controlled between 20 and 25 ℃, the concentrated solution at the bottom of the third-stage refining tank is pumped into the second-stage refining tank by using a submerged pump to be used as a replenishing solution, and the solution is replenished in the third-stage refining tank by using primary water. Because the molar ratio of sodium element to phosphorus element in the glyphosate mother liquor is 1:1.2, the phosphate which is most easily and stably produced in the incineration process is sodium pyrophosphate, and the molar ratio of the sodium element to the phosphorus element in the sodium pyrophosphate is 2:1, in order to ensure the uniqueness of sodium pyrophosphate in a refined product, a certain amount of flake alkali needs to be added into the solution, the element ratio is ensured to be normal, and the position for adding the alkali is selected in a three-stage refining tank. Considering that the normal pH value of the sodium pyrophosphate aqueous solution is 10.1-10.2, and the pH value of the solution is more than 11, which indicates that a certain amount of sodium phosphate is contained, and the pH value is less than 9, which indicates that a certain amount of disodium hydrogen phosphate is contained, a pH monitoring instrument is arranged in the secondary refining tank to monitor the pH value of the aqueous solution, so that the pH value of the solution is adjusted in the secondary refining tank. Because the solubility of the sodium pyrophosphate in water is not high and the concentration of the sodium pyrophosphate is increased due to the cyclic application of the solution, a large amount of insoluble mixture can be deposited at the bottom of the primary refining tank, and the insoluble mixture is pumped out by using a slurry pump and directly sprayed into a rotary kiln at the temperature of 350-450 ℃ for high-temperature treatment, so that the sodium pyrophosphate with the purity of 99% is finally obtained.

The refining tank has the effects of effectively separating sodium chloride in the incineration solid materials through the characteristic that the solubility of phosphate and the solubility of sodium chloride are different at different temperatures, and effectively controlling the proportion of elements, thereby providing the premise for high purity of the phosphate.

Claims

1. A refining device for glyphosate byproduct phosphate by alkyl ester method is characterized in that a solid waste material feeding pipe (1) is connected with a first-stage refining tank (2), the upper part of the first-stage refining tank (2) is connected with the top of a second-stage refining tank (3), and the upper part of the second-stage refining tank (3) is connected with the top of a third-stage refining tank (4);

the bottom of the third-stage refining tank (4) is connected with the top of the second-stage refining tank (3) through a first submerged pump (5), and the bottom of the second-stage refining tank (3) is connected with the top of the first-stage refining tank (2) through a second submerged pump (6).

2. The refining device of the phosphate byproduct by the alkyl ester method glyphosate as per claim 1, characterized in that a steam bubbler (7) is arranged in the primary refining tank (2), and the bottom of the primary refining tank (2) is connected to a combustion furnace through a submerged pump III (11); a first circulating water coil (8) is arranged in the second-stage refining tank (3), and a second circulating water coil (9) is arranged in the third-stage refining tank (4).

3. The refining device of the phosphate byproduct from glyphosate by alkyl ester method as claimed in claim 1, wherein a flake caustic entering pipeline (10) is arranged in the third refining tank (4).