CN215799936U - Feeding device for preparing glyoxylic acid by electrolyzing oxalic acid - Google Patents
Feeding device for preparing glyoxylic acid by electrolyzing oxalic acid Download PDFInfo
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- CN215799936U CN215799936U CN202121359624.4U CN202121359624U CN215799936U CN 215799936 U CN215799936 U CN 215799936U CN 202121359624 U CN202121359624 U CN 202121359624U CN 215799936 U CN215799936 U CN 215799936U
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Abstract
The utility model belongs to the technical field of oxalic acid electrolysis, and particularly relates to a feeding device for preparing glyoxylic acid by electrolyzing oxalic acid, which comprises an electrolytic tank, a gas-liquid separator, a circulating pump, a saturated solution preparation kettle and a filter, wherein the saturated solution preparation kettle is internally filled with crystal oxalic acid, the circulating pump is used for feeding the mixed solution of oxalic acid and glyoxylic acid at the outlet of the electrolytic tank into the saturated solution preparation kettle, and oxalic acid crystals are dissolved into the mixed solution of oxalic acid and glyoxylic acid, so that the oxalic acid is in a saturated state, the oxalic acid entering the electrolytic tank is always in a saturated state, and the electrolytic efficiency is improved; the utility model also has the advantages of less equipment, less investment, low energy consumption, low production cost, simple process and the like.
Description
Technical Field
The utility model belongs to the technical field of oxalic acid electrolysis, and particularly relates to a feeding device for preparing glyoxylic acid through oxalic acid electrolysis.
Background
Glyoxylic acid is an important chemical raw material, and the structural formula of the glyoxylic acid is as follows: CHOCOOH, used for flavoring and fixing fragrance of cosmetics, essence of daily chemicals, and flavoring of food; it is also used as intermediate of medicine, dye, plastic and pesticide, and raw material of vanillin. The prior art for producing glyoxylic acid comprises maleic anhydride ozone oxidation, glyoxal oxidation, ethylene oxidation, acetaldehyde oxidation, oxalic acid electrolytic reduction and the like. The maleic anhydride ozone oxidation method has large equipment investment, high raw material price, large power consumption and high production cost; the separation process of unconverted glyoxal and inorganic acid in the oxidation solution of the glyoxal oxidation method is complex, the operation is troublesome, the solvent loss is large, the equipment is easy to corrode, the raw material yield is low, the product quality is poor, the investment of product refining equipment is large, a large amount of nitrogen oxide is generated in the production process, the tail gas treatment cost is high, and the environmental pollution is serious; the ethylene oxidation method has long reaction time, pressure resistance and corrosion resistance required by equipment, low conversion rate, large investment and high energy consumption; the acetaldehyde oxidation method has the advantages of more byproducts, low yield, difficult process separation, long flow and high cost; the oxalic acid electrolytic reduction method has no pollution, good product quality and cheap raw materials, but because the solubility of oxalic acid in water is small, the electrolytic process can only be carried out under a lower concentration, the concentration of oxalic acid after electrolysis is lower, the electrolytic efficiency is reduced, and the concentration in the oxalic acid electrolytic process is in a saturated state to improve the electrolytic efficiency, which is particularly necessary.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides the feeding device for preparing the glyoxylic acid by electrolyzing the oxalic acid, which has the advantages of simple process, low production cost, saturated oxalic acid solution and high electrolysis efficiency.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a feeding device for preparing glyoxylic acid by electrolyzing oxalic acid, which comprises an electrolytic tank, a gas-liquid separator, a circulating pump, a saturated solution preparation kettle and a filter, the outlet of the saturated solution preparation kettle is connected to the inlet of the filter through a pipeline, the outlet of the filter is connected to the cathode inlet of the electrolytic cell through a pipeline, the cathode outlet of the electrolytic bath is connected to the inlet of a gas-liquid separator through a pipeline, the outlet of the gas-liquid separator is connected to the inlet of a circulating pump through a pipeline, the outlet of the circulating pump is connected to the inlet of a saturated solution preparation kettle through a pipeline, the cathode outlet of the electrolytic cell is also connected to a crude glyoxylic acid storage tank through a pipeline, the outlet of the filter is also communicated with a gas-liquid separator through a pipeline, the top of the saturated solution preparation kettle is provided with an oxalic acid crystal feeding port and a desalted water feeding port, and the gas-liquid separator is provided with a gas outlet connected with a recovery device through a pipeline.
Furthermore, a plurality of baffle plates which are mutually parallel and staggered are arranged in the saturated solution preparation kettle.
Furthermore, an adjusting valve is arranged on a pipeline connecting an outlet of the filter and the gas-liquid separator;
furthermore, an online oxalic acid concentration detector is arranged on a pipeline connecting the outlet of the filter and the cathode inlet of the electrolytic cell.
Further, the circulating pump is controlled by frequency conversion.
Furthermore, the regulating valve, the online oxalic acid concentration detector and the circulating pump are all connected with a remote control system.
Has the advantages that:
1. according to the utility model, the saturated solution preparation kettle is arranged, the oxalic acid crystal is filled in the saturated solution preparation kettle in advance, and the circulating pump is used for forcibly circularly concentrating the electrolyzed low-concentration oxalic acid solution in the saturated solution preparation kettle, so that the concentration of the oxalic acid solution entering the electrolytic cell is always in a saturated state, the electrolytic efficiency is improved, and the yield of glyoxylic acid is improved.
2. The utility model is more beneficial to the stable control of the operation of the device by arranging the regulating valve, the online oxalic acid concentration detector and the circulating pump and connecting the regulating valve, the online oxalic acid concentration detector and the circulating pump with a remote control system.
3. The utility model has the advantages of less equipment, simple process, low energy consumption and low production cost.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of internal baffles of a saturated solution preparation kettle according to the present invention;
FIG. 1-electrolytic cell; 2-a gas-liquid separator; 3-a circulating pump; 4-preparing a saturated solution kettle; 5-an online oxalic acid concentration detector; 6-adjusting the valve; 7-a recovery unit; 8-a desalted water pipe; a 9-oxalic acid crystal inlet; 10-a filter; 11-baffle plate.
Detailed Description
Example 1
Referring to fig. 1, in order to improve the electrolysis efficiency of glyoxylic acid preparation by oxalic acid electrolysis and reduce the production cost, a feeding device for glyoxylic acid preparation by oxalic acid electrolysis is provided, comprising an electrolytic tank 1, a gas-liquid separator 2, a circulating pump 3, a saturated solution preparation kettle 4 and a filter 10, wherein the outlet of the saturated solution preparation kettle 4 is connected to the inlet of the filter 10 through a pipeline, the outlet of the filter 10 is connected to the cathode inlet of the electrolytic tank 1 through a pipeline, the cathode outlet of the electrolytic tank 1 is connected to the inlet of the gas-liquid separator 2 through a pipeline, the outlet of the gas-liquid separator 2 is connected to the inlet of the circulating pump 3 through a pipeline, the outlet of the circulating pump 3 is connected to the inlet of the saturated solution preparation kettle 4 through a pipeline, the cathode outlet of the electrolytic tank 1 is further connected to a crude glyoxylic acid storage tank through a pipeline, and the outlet of the filter 10 is further communicated with the gas-liquid separator 2 through a pipeline, an adjusting valve 6 is arranged on a pipeline connecting the outlet of the filter 10 and the gas-liquid separator 2; the top of the saturated solution preparation kettle 4 is provided with an oxalic acid crystal feeding port 9 and a desalted water feeding port, the desalted water feeding port is connected with a desalted water pipeline 8 through a pipeline, and a plurality of parallel and staggered baffle plates 11 are arranged in the saturated solution preparation kettle 4; the gas-liquid separator 2 is provided with a gas outlet which is connected with the recovery device 7 through a pipeline; an online oxalic acid concentration detector 5 is arranged on a pipeline connecting the outlet of the filter 10 and the cathode inlet of the electrolytic cell 1; the circulating pump 3 is controlled by frequency conversion; and the regulating valve 6, the online oxalic acid concentration detector 5 and the circulating pump 3 are all connected with a remote control system.
The working principle of the utility model is that crystal oxalic acid is filled in a saturated solution preparation kettle 4, the saturated oxalic acid solution is changed into an unsaturated state from the saturated state after being electrolyzed, the concentration of the oxalic acid solution is reduced, in order to keep higher electrolysis efficiency, the mixed solution of unsaturated oxalic acid and glyoxylic acid at the outlet of an electrolytic tank 1 is pumped into the saturated solution preparation kettle 4 through a circulating pump 3, the crystal oxalic acid is dissolved in the saturated solution preparation kettle 4, the oxalic acid solution is changed into the saturated state from the unsaturated state, and the oxalic acid solution entering the electrolytic tank 1 is always in the saturated state; the online oxalic acid concentration detector 5 detects the concentration of oxalic acid at any moment, and if the concentration of oxalic acid does not reach the saturated state, the adjusting valve 6 is opened to be large for circular dissolution, so that the oxalic acid solution is ensured to be in the saturated state.
Modifications and variations of the present invention, which are familiar to the inventor, are within the scope of the utility model, and are not limited to the embodiments described.
Claims (6)
1. A feeding device for preparing glyoxylic acid by electrolyzing oxalic acid is characterized by comprising an electrolytic tank, a gas-liquid separator, a circulating pump, a saturated solution preparation kettle and a filter, the outlet of the saturated solution preparation kettle is connected to the inlet of the filter through a pipeline, the outlet of the filter is connected to the cathode inlet of the electrolytic cell through a pipeline, the cathode outlet of the electrolytic bath is connected to the inlet of a gas-liquid separator through a pipeline, the outlet of the gas-liquid separator is connected to the inlet of a circulating pump through a pipeline, the outlet of the circulating pump is connected to the inlet of a saturated solution preparation kettle through a pipeline, the cathode outlet of the electrolytic cell is also connected to a crude glyoxylic acid storage tank through a pipeline, the outlet of the filter is also communicated with a gas-liquid separator through a pipeline, the top of the saturated solution preparation kettle is provided with an oxalic acid crystal feeding port and a desalted water feeding port, and the gas-liquid separator is provided with a gas outlet connected with a recovery device through a pipeline.
2. The feeding device for preparing glyoxylic acid through oxalic acid electrolysis according to claim 1, wherein a plurality of parallel and staggered baffle plates are arranged in the saturated solution preparation kettle.
3. The feeding device for preparing the glyoxylic acid through the electrolysis of the oxalic acid according to claim 1, wherein a regulating valve is arranged on a pipeline connecting an outlet of the filter and the gas-liquid separator.
4. The feeding device for preparing glyoxylic acid through oxalic acid electrolysis according to claim 1, wherein an online oxalic acid concentration detector is arranged on a pipeline connecting the outlet of the filter and the inlet of the cathode of the electrolysis cell.
5. The feeding device for preparing glyoxylic acid through oxalic acid electrolysis according to claim 1, characterized in that the circulating pump is controlled by frequency conversion.
6. The feeding device for preparing glyoxylic acid through oxalic acid electrolysis according to claim 1, wherein the regulating valve, the online oxalic acid concentration detector and the circulating pump are all connected with a remote control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121359624.4U CN215799936U (en) | 2021-06-18 | 2021-06-18 | Feeding device for preparing glyoxylic acid by electrolyzing oxalic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121359624.4U CN215799936U (en) | 2021-06-18 | 2021-06-18 | Feeding device for preparing glyoxylic acid by electrolyzing oxalic acid |
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| Publication Number | Publication Date |
|---|---|
| CN215799936U true CN215799936U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121359624.4U Active CN215799936U (en) | 2021-06-18 | 2021-06-18 | Feeding device for preparing glyoxylic acid by electrolyzing oxalic acid |
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| CN (1) | CN215799936U (en) |
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2021
- 2021-06-18 CN CN202121359624.4U patent/CN215799936U/en active Active
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