CN215781602U - Concentration device for glyoxylic acid and oxalic acid aqueous solution - Google Patents
Concentration device for glyoxylic acid and oxalic acid aqueous solution Download PDFInfo
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- CN215781602U CN215781602U CN202122179854.9U CN202122179854U CN215781602U CN 215781602 U CN215781602 U CN 215781602U CN 202122179854 U CN202122179854 U CN 202122179854U CN 215781602 U CN215781602 U CN 215781602U
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Abstract
The utility model belongs to the technical field of glyoxylic acid and oxalic acid aqueous solution, and particularly relates to a concentration device of glyoxylic acid and oxalic acid aqueous solution, which comprises a combustion furnace, a heat exchanger, a flash evaporator, a steam absorber, a circulating pump and a cooler; the utility model can effectively reduce the production cost by arranging the combustion furnace and using the combustible waste gas as the fuel, and the combustion furnace is adopted to directly heat and concentrate the solution of the glyoxylic acid and the oxalic acid, so that the heat energy utilization rate is higher.
Description
Technical Field
The utility model belongs to the technical field of glyoxylic acid concentration, and particularly relates to a concentration device for an aqueous solution of glyoxylic acid and oxalic acid.
Background
The glyoxylic acid consists of an aldehyde group-CHO and a carboxyl group-COOH, the molecular formula of the glyoxylic acid is C2H2O3, the structure formula is HOCCOOH, and the molecular weight is 74.04; glyoxylic acid is the simplest aldehydic acid, has two properties of aldehyde and acid, is an important chemical raw material and intermediate, and is widely applied to the fields of medicines, pesticides, spices, paper making, food additives, biochemistry and the like. At present, the method is mainly used for the production of broad-spectrum antibiotics amoxicillin, perfume vanillin, antihypertensive drug atenolol, cosmetic additive allantoin, high value-added aromatic aldehyde and pesticide intermediates; in the industrial production of glyoxylic acid by electrolytic reduction of oxalic acid, oxalic acid saturated solution is used as a raw material to generate glyoxylic acid by electrolytic reduction, and the electrolytic reduction method of oxalic acid has the advantages of cheap and easily obtained raw materials, short process flow and the like. In order to obtain high-concentration glyoxylic acid, part of water in the mixed solution of oxalic acid and glyoxylic acid needs to be evaporated by heating, and then the oxalic acid is separated out by cooling crystallization, and the evaporation of the water in the solution of oxalic acid and glyoxylic acid needs a large amount of steam, so that the steam consumption is high, and the production cost is high.
SUMMERY OF THE UTILITY MODEL
Based on the prior art, the utility model provides a concentration device for glyoxylic acid and oxalic acid aqueous solution with low energy consumption.
In order to solve the technical problems, the technical scheme of the utility model is as follows: a concentration device for glyoxylic acid and oxalic acid aqueous solution comprises a combustion furnace, a heat exchanger, a flash evaporator, a steam absorber, a circulating pump and a cooler, wherein a hot flue gas outlet of the combustion furnace is connected with a shell pass inlet of the heat exchanger, and a shell pass outlet of the heat exchanger is connected with a flue gas discharge pipeline; the tube pass inlet of the heat exchanger is connected with a storage tank of mixed solution of oxalic acid and glyoxylic acid through a pipeline a, the tube pass outlet of the heat exchanger is connected with a flash evaporator through a pipeline, a steam outlet of the flash evaporator is connected with a steam absorber through a pipeline, a condensed water outlet of the steam absorber is connected with an inlet of a circulating pump through a pipeline, an outlet of the circulating pump is connected with a spray water inlet of the steam absorber through a pipeline, and the cooler is arranged on a pipeline connecting an outlet of the circulating pump and the spray water inlet of the steam absorber; the outlet of the circulating pump is also connected with a saturated oxalic acid solution preparation device through a pipeline c; and a concentrated solution outlet of the flash evaporator is connected with the freezing and crystallizing device through a pipeline b.
Furthermore, a combustible waste gas inlet, a natural gas inlet and an air inlet which are arranged on the combustion furnace are respectively connected with a combustible waste gas pipeline, a natural gas pipeline and an air pipeline.
Furthermore, the number of the heat exchangers is one or more, and the connection mode of the heat exchangers is parallel or serial.
Furthermore, a plurality of metal packing layers are arranged in the steam absorber, and a spraying device is arranged above the packing layers and communicated with a spraying water inlet.
Further, the main components of the combustible waste gas are hydrogen, carbon monoxide and methane.
Has the advantages that:
the utility model can effectively reduce the production cost by arranging the combustion furnace and using the combustible waste gas as the fuel, and the combustion furnace is adopted to directly heat and concentrate the solution of the glyoxylic acid and the oxalic acid, so that the heat energy utilization rate is higher.
Drawings
FIG. 1 is a schematic diagram of a heat exchanger assembly according to the present invention;
FIG. 2 is a schematic diagram of the present invention with two heat exchangers;
FIG. 3 is a schematic diagram of a three-bank heat exchanger according to the present invention;
FIG. 1-furnace; 2-a heat exchanger; 3-a flash evaporator; 4-a steam absorber; 5-a circulating pump; 6-a cooler; 7-a flue gas discharge pipeline; 8-line a; 9-line b; 10-line c.
Detailed Description
Example 1
Referring to fig. 1, in order to reduce the production cost in the process of concentrating the mixed solution of oxalic acid and glyoxylic acid and comprehensively utilize combustible waste gas, a concentrating device of glyoxylic acid and oxalic acid aqueous solution is provided, which comprises a combustion furnace 1, a heat exchanger 2, a flash evaporator 3, a steam absorber 4, a circulating pump 5 and a cooler 6, wherein a combustible waste gas inlet, a natural gas inlet and an air inlet which are arranged on the combustion furnace 1 are respectively connected with a combustible waste gas pipeline, a natural gas pipeline and an air pipeline; the heat exchangers 2 are arranged in a group, a hot flue gas outlet of the combustion furnace 1 is connected with a shell pass inlet of the heat exchanger 2, and a shell pass outlet of the heat exchanger 2 is connected with a flue gas discharge pipeline 7; the tube side inlet of the heat exchanger 2 is connected with a storage tank of mixed solution of oxalic acid and glyoxylic acid through a pipeline a8, the tube side outlet of the heat exchanger 2 is connected with a flash evaporator 3 through a pipeline, the steam outlet of the flash evaporator 3 is connected with a steam absorber 4 through a pipeline, a plurality of metal packing layers are arranged in the steam absorber 4, and a spraying device is arranged above the packing layers and communicated with a spraying water inlet; a condensed water outlet of the steam absorber 4 is connected with an inlet of a circulating pump 5 through a pipeline, an outlet of the circulating pump 5 is connected with a spray water inlet of the steam absorber 4 through a pipeline, and the cooler 6 is arranged on the pipeline connecting the outlet of the circulating pump 5 with the spray water inlet of the steam absorber 4; the outlet of the circulating pump 5 is also connected with a saturated oxalic acid solution preparation device through a pipeline c 10; the concentrated solution outlet of the flash evaporator 3 is connected with the freezing and crystallizing device through a pipeline b 9.
The main components of the combustible waste gas are hydrogen, carbon monoxide and methane.
Referring to fig. 2, embodiment 2 differs from embodiment 1 in that: the number of the heat exchangers 2 is two, and the two groups of the heat exchangers 2 are connected in series.
Referring to fig. 3, embodiment 3 differs from embodiment 1 in that: the number of the heat exchangers 2 is three, and the three groups of heat exchangers 2 are connected in parallel.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.
Claims (4)
1. The utility model provides a concentration device of glyoxylic acid and oxalic acid aqueous solution which characterized in that: the device comprises a combustion furnace, a heat exchanger, a flash evaporator, a steam absorber, a circulating pump and a cooler, wherein a hot flue gas outlet of the combustion furnace is connected with a shell pass inlet of the heat exchanger, and a shell pass outlet of the heat exchanger is connected with a flue gas discharge pipeline; the tube pass inlet of the heat exchanger is connected with a storage tank of mixed solution of oxalic acid and glyoxylic acid through a pipeline a, the tube pass outlet of the heat exchanger is connected with a flash evaporator through a pipeline, a steam outlet of the flash evaporator is connected with a steam absorber through a pipeline, a condensed water outlet of the steam absorber is connected with an inlet of a circulating pump through a pipeline, an outlet of the circulating pump is connected with a spray water inlet of the steam absorber through a pipeline, and the cooler is arranged on a pipeline connecting an outlet of the circulating pump and the spray water inlet of the steam absorber; the outlet of the circulating pump is also connected with a saturated oxalic acid solution preparation device through a pipeline c; and a concentrated solution outlet of the flash evaporator is connected with the freezing and crystallizing device through a pipeline b.
2. The apparatus for concentrating an aqueous solution of glyoxylic acid and oxalic acid according to claim 1, characterized in that: the combustible waste gas inlet, the natural gas inlet and the air inlet of the combustion furnace are respectively connected with the combustible waste gas pipeline, the natural gas pipeline and the air pipeline.
3. The apparatus for concentrating an aqueous solution of glyoxylic acid and oxalic acid according to claim 1, characterized in that: the heat exchangers are arranged in one or more groups, and the connection mode of the heat exchangers is parallel connection or series connection.
4. The apparatus for concentrating an aqueous solution of glyoxylic acid and oxalic acid according to claim 1, characterized in that: a plurality of metal packing layers are arranged in the steam absorber, and a spraying device is arranged above the packing layers and communicated with a spraying water inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122179854.9U CN215781602U (en) | 2021-09-09 | 2021-09-09 | Concentration device for glyoxylic acid and oxalic acid aqueous solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122179854.9U CN215781602U (en) | 2021-09-09 | 2021-09-09 | Concentration device for glyoxylic acid and oxalic acid aqueous solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215781602U true CN215781602U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122179854.9U Active CN215781602U (en) | 2021-09-09 | 2021-09-09 | Concentration device for glyoxylic acid and oxalic acid aqueous solution |
Country Status (1)
| Country | Link |
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| CN (1) | CN215781602U (en) |
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2021
- 2021-09-09 CN CN202122179854.9U patent/CN215781602U/en active Active
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