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CN-224220769-U - Continuous rectification device of glyphosate

CN224220769UCN 224220769 UCN224220769 UCN 224220769UCN-224220769-U

Abstract

The utility model relates to a glyphosate continuous rectifying device, wherein a side end of a methylal rectifying tower is connected with a gas phase inlet pipe, the bottom of the methylal rectifying tower is connected with a reboiler a, the top of the methylal rectifying tower is connected with a first condensing device, the bottom of the reboiler a is provided with a material extraction pipe, the material extraction pipe is externally connected with a buffer tank, the upper end of the first condensing device is provided with an exhaust pipeline, the lower end of the first condensing device is externally connected with a first reflux tank, the buffer tank is communicated with a feed inlet of a methanol rectifying tower through a transfer pump at the side end of the buffer tank, two sides of the bottom of the methanol rectifying tower are respectively provided with a reboiler b, the top of the methanol rectifying tower is connected with a second condensing device, the reboiler b has the same structure as the reboiler a, the bottom of the reboiler b is provided with a waste water extraction pipe, the upper end of the second condensing device is provided with a tail gas pipeline, and the lower end of the second condensing device is externally connected with a second reflux tank.

Inventors

  • XU SHUJIAN
  • HAN FENGYU
  • WANG CHUNSHENG
  • HAN SHAOJIE
  • LI QIUJUN
  • HAN GENGXIN
  • WANG MEI

Assignees

  • 河南红东方化工股份有限公司

Dates

Publication Date
20260512
Application Date
20250606

Claims (8)

  1. 1. A glyphosate continuous rectifying device comprises a methylal rectifying tower (1) and a methanol rectifying tower (2), and is characterized in that the middle part of the side end of the methylal rectifying tower (1) is connected with a gas phase inlet pipe (11), the bottom is connected with a reboiler a (3), the top is connected with a first condensing device (4), the upper end and the lower end of the interior are respectively provided with a first packing layer (12), the gas phase inlet pipe (11) is provided with an online gas flowmeter, a gas component analysis device and a control valve, a methylal measuring device (31) is arranged on a connecting pipeline of the reboiler a (3) and the methylal rectifying tower (1), the left lower end of the reboiler a (3) is provided with a steam inlet pipe, the right upper end is provided with a steam outlet pipe, the bottom is provided with a material collecting pipe (32), the right side of the upper end of the first condensing device (4) is provided with an exhaust pipeline (41), the exhaust pipeline (41) is externally connected with a chloromethane purifying treatment device, the lower end of the first reflux tank (6) is externally connected with the first reflux pipeline (61), the lower end of the reflux pipeline (61) is provided with a reflux pump (61) through the first reflux pipeline (61), the methanol rectifying tower is communicated with a middle feeding port at the side end of the methanol rectifying tower (2) through a transfer pump (51), a reboiler b (7) is arranged at two sides of the bottom of the methanol rectifying tower (2), a second condensing device (8) is connected to the top of the methanol rectifying tower, a second packing layer (21) is arranged at the upper end and the lower end of the inside of the methanol rectifying tower, the reboiler b (7) is identical to the reboiler a (3) in structure, a waste water extraction pipe (71) is arranged at the bottom of the reboiler b (7), a methanol measuring device (72), a COD measuring device (73) and an acidity measuring device (74) are sequentially arranged on a connecting pipeline between the reboiler b (7) and the methanol rectifying tower (2), a tail gas pipeline (81) is arranged on the right side of the upper end of the second condensing device (8), a tail gas pipeline (81) is externally connected with a tail gas treatment device, a second reflux tank (9) is externally connected to the lower end of the tail gas pipeline, a second reflux tank (91) is arranged on the left side of the lower end of the second reflux tank (9), and a methanol discharging pipe is arranged on the right side of the lower end of the second reflux tank, and the second reflux tank (91) is connected with the methanol rectifying tower (2) through the circulating pump.
  2. 2. A glyphosate continuous rectifying device according to claim 1, characterized in that the exterior of said methylal rectifying tower (1) and said methanol rectifying tower (2) are both sleeved with heat-insulating layers.
  3. 3. A glyphosate continuous rectifying device according to claim 1, characterized in that foam removers (0) are arranged at the top ends of the methylal rectifying tower (1) and the methanol rectifying tower (2).
  4. 4. A glyphosate continuous rectifying device according to claim 1, characterized in that the lower part, the middle part and the top of the methylal rectifying tower (1) and the methanol rectifying tower (2) are respectively provided with an on-line thermometer.
  5. 5. A glyphosate continuous rectifying device according to claim 1, characterized in that said exhaust pipe (41) is provided with a gas component measuring device (42).
  6. 6. A glyphosate continuous rectifying device according to claim 1, characterized in that said first reflux drum (6) is provided at its upper end with a methylal content measuring device (62).
  7. 7. A glyphosate continuous rectifying device according to claim 1, characterized in that the upper end of said second reflux drum (9) is provided with a methanol content meter (92).
  8. 8. A glyphosate continuous rectifying device according to claim 1, characterized in that said first condensing means (4) and said second condensing means (8) are of the same structure, each consisting of a plurality of sets of tubular condensers, the internal condensing medium of which is chilled brine.

Description

Continuous rectification device of glyphosate Technical Field The utility model belongs to the technical field of chemical industry, and particularly relates to a glyphosate continuous rectification device. Background The method for producing the glyphosate at home mainly comprises an alkyl ester method, wherein glycine, dimethyl phosphite and paraformaldehyde are taken as raw materials for addition and condensation to prepare a synthetic liquid, then the synthetic liquid is pumped into a hydrolysis kettle, hydrochloric acid is added for hydrolysis and desolventizing, and finally alkali is added for crystallization, in the desolventizing process, the most common mode is that desolventizing products are condensed by a condenser to form acid methanol, and then the acid methanol is further neutralized to be neutral and then enter a methylal rectifying tower and a methanol rectifying tower for separation, when the method is used specifically, equipment such as a preheater is needed to be additionally arranged for preheating due to the fact that the temperature of the liquid enters the tower, so that the cost input is increased, and because the existing equipment is low in automation degree, manual field operation and analysis sampling are often needed in the process of tower efficiency and flow adjustment, so that a certain danger and error exist, the problems of high cost, low cost and poor separation effect of the existing glyphosate desolventizing products are solved, and the whole device is designed to be reasonable and reasonable in order to improve the separation and treatment of the existing glyphosate desolventizing products. Disclosure of utility model The utility model aims to overcome the defects of the prior art and provide the glyphosate continuous rectification device which is high-efficiency and reasonable in overall design and good in use effect. The utility model aims to realize that a glyphosate continuous rectifying device comprises a methylal rectifying tower and a methanol rectifying tower, wherein the middle part of the side end of the methylal rectifying tower is connected with a gas phase inlet pipe, the bottom of the side end of the methylal rectifying tower is connected with a reboiler a, the top of the side end of the methylal rectifying tower is connected with a first condensing device, the upper end and the lower end of the inside of the methylal rectifying tower are respectively provided with a first packing layer, an online gas flowmeter, a gas component analysis device and a control valve are arranged on the gas phase inlet pipe, a methylal measuring device is arranged on a connecting pipeline of the reboiler a and the methylal rectifying tower, the left lower end of the reboiler a is provided with a steam inlet pipe, the right upper end of the reboiler a is provided with a steam outlet pipe, the bottom of the methylal rectifying tower is provided with a material extraction pipe, the material extraction pipe is connected with a buffer tank through the material extraction pipe, the right side of the upper end of the first condensing device is externally connected with a chloromethane purifying treatment device, the left side of the lower end of the first reflux tank is externally connected with a first reflux tank, the left side of the lower end of the first reflux tank is provided with a methylal discharge pipe, and the first reflux pipe is connected with a reflux pipe through a reflux pipe; the side end of the buffer tank is provided with a material transferring pump, the material transferring pump is used for realizing the communication between the material transferring pump and a feeding hole in the middle part of the side end of the methanol rectifying tower, two sides of the bottom of the methanol rectifying tower are respectively provided with a reboiler b, the top of the methanol rectifying tower is connected with a second condensing device, the upper end and the lower end of the inside of the methanol rectifying tower are respectively provided with a second packing layer, the reboiler b has the same structure as the reboiler a, the bottom of the reboiler b is provided with a waste water extraction pipe, a methanol measuring device, a COD measuring device and an acidity measuring device are sequentially arranged on a connecting pipeline between the reboiler b and the methanol rectifying tower, the right side of the upper end of the second condensing device is provided with a tail gas pipeline, the tail gas pipeline is externally connected with a tail gas treatment device, the lower extreme external second reflux drum that has, the left side of second reflux drum lower extreme is provided with the second back flow, and the right side of lower extreme is provided with the methyl alcohol discharging pipe, and wherein the second back flow is connected with the top of the tower of methyl alcohol rectifying column through the circulating pump. Further, the methylal rectifying to