CN203508024U - Gas flow circulating reaction device for preparing glyoxylic acid by oxygen oxidation - Google Patents
Gas flow circulating reaction device for preparing glyoxylic acid by oxygen oxidation Download PDFInfo
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- CN203508024U CN203508024U CN201320653610.2U CN201320653610U CN203508024U CN 203508024 U CN203508024 U CN 203508024U CN 201320653610 U CN201320653610 U CN 201320653610U CN 203508024 U CN203508024 U CN 203508024U
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Abstract
The utility model relates to a gas flow circulating reaction device for preparing glyoxylic acid by oxygen oxidation for solving the problems of high NOX tail gas amount, environment pollution and high nitric acid consumption in the prior art. The gas flow circulating reaction device is characterized in that a gas flow circulating device and an oxygen supply device are additionally arranged on a reaction kettle (6), the gas flow circulating reaction device is composed of a gas circulating fan (2), a frequency converter (1), a gas flow control valve (3) and a pipeline and gas flow distributor (7), the oxygen supply device is composed of an oxygen cylinder on a metering scale (9) and a gas pipe, and an exhaust pipe (4) on a kettle cover is connected with a liquid sealing trough (16) with an alarm (15) through a pipeline. A method that nitrogen oxides generated during production are utilized to catalyze oxygen for oxidization to prepare a glyoxal water solution is utilized to realize industrialization, the consumption of nitric acid is reduced, the NOX tail gas emission is reduced and the yield of the glyoxylic acid can be also improved.
Description
One, technical field
The utility model belongs to medication chemistry production equipment, relates in particular to a kind of dioxygen oxidation legal system for the airflow circulating reaction unit of glyoxalic acid.
Two, background technology
Glyoxalic acid (OHC-COOH), has another name called formaldehyde formic acid or gyloxylic acid, is the simplest aldehydic acid, has the character of aldehyde and carboxylic acid concurrently, and chemical property is quite active.Can with multiple compounds generation condensation reaction, be therefore widely used in the industries such as medicine, agricultural chemicals, spices, papermaking, leather, dyestuff.Along with the development in glyoxalic acid downstream product market, it has become a kind of chemical products with fine development prospect, and is at home and abroad widely used.
In prior art, producing glyoxalic acid method is mainly nitric acid oxidation glyoxal method.But the method is deposited and is produced in process of production a large amount of NO
xtail gas, the problem such as contaminated environment and nitric acid consumption are large.For how effectively reducing NO
xtail gas pollution and nitric acid consumption, in the existing way of chemosynthesis technical field, produce exhaust gas treating method and the treatment system > > of glyoxalic acid as a patent of invention < < glyoxal nitric acid oxidation method, 201110185138.X, Bao Yingyuan.Introduce air the NO in glyoxal nitric acid oxidation generation tail gas is oxidized to NO
2; Water carries out after 6 grades of absorptions, with alkali liquor absorption, and absorption liquid is processed to rear section recycled.But the method also exists nitric acid consumption large, the problem such as the large and absorption equipment of vent gas treatment amount is huge; The synthetic method > > of patent of invention < < preparing glyoxalic acid solution by oxygen catalytic oxidation of glyoxal with nitrogen oxide and for example, 200410096499.7, Zhou Zhiming.It is in closed reactor, uses nitrogen oxide catalysis, uses dioxygen oxidation glyoxal water solution to prepare glyoxalic acid solution.But the method requires hierarchy of control oxygen pressure more than 0.3MPa, belongs to and presses very much enclosed system, and with the comparison of traditional nitric acid oxidation glyoxal method, its equipment requirement is higher, and operation easier increases, and safety coefficient reduces.This patent produces under laboratory condition, and reactor volume slightly amplifies, and system required pressure just increases a lot, so still unrealized industrialization so far.
Three, summary of the invention
The purpose of this utility model is exactly in order to provide a kind of in normal pressure fluid-tight system, with the nitrogen oxide producing in nitric acid oxidation glyoxal process, the method for oxygen catalytic oxidation glyoxal preparation glyoxalic acid realizes industrialized dioxygen oxidation legal system for the airflow circulating reaction unit of glyoxalic acid.
The technical scheme that the utility model adopts is: it is by reactor, be arranged on the charging aperture on kettle cover, drive shaft and the blast pipe of the rotation of liquid agitation oar, the discharge nozzle of still tail band outlet valve and be arranged on the steam pipe with heating steam valve of still side and with the formations such as cooling tube of cooling valve, on reactor, set up air current circulation and apparatus of oxygen supply, described air current circulation is by gas circulation blower fan, frequency converter, gas flow regulating valve, pipeline and air distributor form, the inlet pipeline of gas circulation blower fan is connected with the kettle cover gas tube orifice of reactor, its port of export is connected with air distributor at the bottom of inserting still with the pipeline with gas flow regulating valve, described apparatus of oxygen supply is to consist of the oxygen bottle and the tracheae that are placed on weigher, and oxygen valve is set on tracheae, and its one end is connected with the oxygen bottle being placed on weigher, and one end is connected with the venthole on reactor, blast pipe on kettle cover is connected with the liquid seal trough that alarm is housed by pipeline, and is provided with Gas Stirring blade on the driving shaft top of liquid agitation oar.
The utility model beneficial effect is: owing to having set up still liquid circulation absorption plant on reactor, with the nitrogen oxide producing in nitric acid oxidation glyoxal process, the method that oxygen catalytic oxidation glyoxal water solution is prepared glyoxalic acid solution realizes industrialization, both reduce the consumption of nitric acid, also reduced NO
xexhaust emissions amount, also can improve the yield of product glyoxalic acid, has using value widely.
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Four, accompanying drawing explanation:
Fig. 1 is structural principle schematic diagram of the present utility model.
In figure: 1 is frequency converter, 2 is blower fan, and 3 is gas flow regulating valve, 4 is blast pipe, and 5 is heating steam valve, and 6 is reactor, 7 is air distributor, and 8 is outlet valve, and 9 is weigher, 10 is liquid agitation oar, and 11 is Gas Stirring blade, and 12 is charging aperture, 13 is oxygen valve, 14 is cooling valve, and 15 is alarm, and 16 is liquid seal trough.
Five, the specific embodiment
As shown in Figure 1, by reactor 6, be arranged on the charging aperture 12 on kettle cover, drive shaft and the blast pipe 4 of 10 rotations of liquid agitation oar, the discharge nozzle of still tail band outlet valve 8 and be arranged on the steam pipe with heating steam valve 5 of still side and produce in glyoxalic acid Equipment Foundations with traditional nitric acid oxidation glyoxal that the cooling tube of cooling valve 14 etc. forms, set up air current circulation and apparatus of oxygen supply, described air current circulation is by gas circulation blower fan 2, frequency converter 1, gas flow regulating valve 3, pipeline and air distributor 7 form, the inlet pipeline of gas circulation blower fan 2 is connected with the kettle cover gas tube orifice of reactor 6, its port of export is connected with air distributor 7 at the bottom of inserting still with the pipeline with gas flow regulating valve 3, described apparatus of oxygen supply is to consist of the oxygen bottle and the tracheae that are placed on weigher 9, and oxygen valve 13 is set on tracheae, and its one end is connected with the oxygen bottle being placed on weigher 9, and one end is connected with the venthole on reactor 6, blast pipe 4 on kettle cover is connected with the liquid seal trough 16 that alarm 15 is housed by pipeline.And be provided with Gas Stirring blade 11 on the driving shaft top of liquid agitation oar 10.While implementing the utility model, a certain amount of 20-40% glyoxal solution is added in reactor 6, appropriate technical hydrochloric acid and water are dropped into reactor 6, under stirring, crack heating steam valve 5, while being slowly warming up to 55 ℃, cuts out heating steam valve 5.Open oxygen valve 13 and pass into oxygen, drive away after reactor 6 top air, close oxygen valve 13.Drip rare nitric acid that appropriate water absorbs tail gas gained, reaction starts immediately, there is rufous NO gas to emit, drip rare nitric acid complete, drip immediately 40% nitric acid preparing in advance, when temperature rises to 60 ℃, open cooling water valve 14, stop dripping 40% nitric acid, open again oxygen valve 13, start gas circulation blower fan 2, maintain reaction temperature at 55-65 ℃, reaction pressure is normal pressure, when system normal pressure alarm equipment alarm or temperature are over 61 ℃, increase cooling water flow or reduce oxygen flow, when system negative pressure alarm equipment alarm or temperature drop to below 59 ℃, reduce cooling water flow, increase oxygen flow or drip nitric acid and supplement nitrogen oxide, when dripping oxygen sum that oxygen that nitric acid emits in oxidation reaction process and steel cylinder pass into and reach equivalent point, stop logical oxygen, insulation reaction 1 hour, be cooled to 0-5 ℃, separate out white crystal, filter to obtain oxalic acid, filtrate is glyoxylic acid solution.
Claims (2)
1. a dioxygen oxidation legal system is for the airflow circulating reaction unit of glyoxalic acid, it comprises reactor (6), be arranged on the charging aperture (12) on kettle cover, drive shaft and the blast pipe (4) of liquid agitation oar (10) rotation, the discharge nozzle of still tail band outlet valve (8) and be arranged on still side band heating steam valve (5) steam pipe and with the cooling tube of cooling valve (14), it is characterized in that: on reactor (6), set up air current circulation and apparatus of oxygen supply, described air current circulation is by gas circulation blower fan (2), frequency converter (1), gas flow regulating valve (3), pipeline and air distributor (7) form, the inlet pipeline of gas circulation blower fan (2) is connected with the kettle cover gas tube orifice of reactor (6), at the bottom of the pipeline insertion still of its port of export with band gas flow regulating valve (3), be connected with air distributor (7), described apparatus of oxygen supply is to consist of the oxygen bottle and the tracheae that are placed on weigher (9), and oxygen valve (13) is set on tracheae, and its one end is connected with the oxygen bottle being placed on weigher (9), and one end is connected with the venthole on reactor (6), blast pipe on kettle cover (4) is connected with the liquid seal trough (16) that alarm (15) are housed by pipeline.
2. dioxygen oxidation legal system according to claim 1, for the airflow circulating reaction unit of glyoxalic acid, is characterized in that: on the driving shaft top of liquid agitation oar (10), be provided with Gas Stirring blade (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320653610.2U CN203508024U (en) | 2013-10-23 | 2013-10-23 | Gas flow circulating reaction device for preparing glyoxylic acid by oxygen oxidation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320653610.2U CN203508024U (en) | 2013-10-23 | 2013-10-23 | Gas flow circulating reaction device for preparing glyoxylic acid by oxygen oxidation |
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| CN203508024U true CN203508024U (en) | 2014-04-02 |
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| CN201320653610.2U Expired - Fee Related CN203508024U (en) | 2013-10-23 | 2013-10-23 | Gas flow circulating reaction device for preparing glyoxylic acid by oxygen oxidation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445186A (en) * | 2017-09-01 | 2017-12-08 | 河北正润环境科技有限公司 | Steel finishes pickle liquor recycle device and method |
| CN109280004A (en) * | 2018-11-30 | 2019-01-29 | 黄冈师范学院 | The method, apparatus and application of nitrogen oxide catalytic air oxidation glyoxal glyoxalic acid |
-
2013
- 2013-10-23 CN CN201320653610.2U patent/CN203508024U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445186A (en) * | 2017-09-01 | 2017-12-08 | 河北正润环境科技有限公司 | Steel finishes pickle liquor recycle device and method |
| CN107445186B (en) * | 2017-09-01 | 2023-06-27 | 河北正润环境科技有限公司 | Recycling device and method for steel finishing pickling waste liquid |
| CN109280004A (en) * | 2018-11-30 | 2019-01-29 | 黄冈师范学院 | The method, apparatus and application of nitrogen oxide catalytic air oxidation glyoxal glyoxalic acid |
| CN109280004B (en) * | 2018-11-30 | 2023-08-22 | 黄冈师范学院 | Method, device and application for preparing glyoxalic acid by oxidizing glyoxal through nitrogen oxide catalysis air |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20141023 |
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| EXPY | Termination of patent right or utility model |