CN103657574A - Device for preparing ADC (azodicarbonamide) foaming agent by self-suction oxidation - Google Patents
Device for preparing ADC (azodicarbonamide) foaming agent by self-suction oxidation Download PDFInfo
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- CN103657574A CN103657574A CN201310613814.8A CN201310613814A CN103657574A CN 103657574 A CN103657574 A CN 103657574A CN 201310613814 A CN201310613814 A CN 201310613814A CN 103657574 A CN103657574 A CN 103657574A
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Abstract
The invention provides a device for preparing an ADC (azodicarbonamide) foaming agent by self-suction oxidation. The device comprises a reaction kettle, wherein a stirrer is arranged in the reaction kettle; a discharging pipe A of the reaction kettle is connected with the input end of a heat exchanger; one path of the output end of the heat exchanger is connected with a discharging pipe B, and the other path of the output end of the heat exchanger is connected with the input end of a Venturi tube; the output end of the Venturi tube extends into the reaction kettle; one end of an upper-layer gas-phase pipeline in the kettle extends to the upper part in the reaction kettle, and the other end of the upper-layer gas-phase pipeline is connected with the input end of the Venturi tube; an oxidant input pipe is connected with the input end of the Venturi tube. The device has the benefits as follows: an oxidant is sucked for carrying out an oxidation reaction by increasingthe circulation outside the kettle, adding the heat exchanger outside the kettle and innovatively adopting the Venturi tube; the stirring dead corners in the kettle are removed and the incomplete reaction is avoided; the catalyst loss is lowered and side reactions in the middle and later periods of the reaction are reduced.
Description
Technical field
The present invention relates to chemical reaction device field, be specifically related to the device that ADC blowing agent is prepared in a kind of self-priming oxidation.
Background technology
The production of traditional ADC blowing agent all adopts single still mode of production, and biruea and water, catalyst mix form slurry are squeezed in the reactor with tubulation, stirring with pump, again chlorine is pressurized to certain pressure and passes into reactor bottom, continuously logical chlorine bubbling reacts, or directly in still, drip oxidant, tail gas absorbs respectively HCl and chlorine by vent gas treatment tower, produces a large amount of waste liquids.Above-mentioned reaction exists as follows to be determined: if 1 employing chlorine oxidation, owing to will overcoming liquid level difference in still, must, through chlorine compression, so just must mate the technical process such as dry chlorine.Technological process is complicated, poor stability, and chlorine is dry, a large amount of electric energy of compression process process need consumption, artificial, and operating cost is very high, has also improved cost of investment simultaneously.2, chlorine or other oxidants join in reactor by modes such as bubbling, droppings, and only, by stirring and disperse in still, dispersion effect is poor, and mass transfer is slow, and reaction speed is slow.3, in still, pass through coil heat exchange, reactor temperature gradient difference is larger, causes product cut size to distribute wide, Quality Down.4, course of reaction need to keep micro-vacuum state always, can cause a large amount of catalyst bromines to overflow, and causes increasing in reaction middle and later periods side reaction, affects product quality.5, the tail gas that exhaust fan is extracted out, after the absorption of water, caustic soda etc., produces a large amount of waste liquids.
Summary of the invention
The object of the invention is to overcome the deficiency that prior art exists, and provide a kind of self-priming oxidation to prepare the device of ADC blowing agent, the present invention, by increasing still outer circulation, utilizes the employing Venturi tube suction oxidant of increase still external heat exchanger novelty to carry out oxidation reaction.Be a kind of innovation, at present, have no and adopt venturi principle that oxidant is drawn into the relevant report in reaction system.
The object of the invention is to complete by following technical solution.The device of ADC blowing agent is prepared in this self-priming oxidation, comprises reactor, is provided with the agitator being connected with power set in reactor; The vomit pipe A of described reactor is connected with the input of heat exchanger by circulating pump, output one tunnel of heat exchanger is connected with vomit pipe B, another road is connected with the input of Venturi tube, the efferent duct of Venturi tube extends in reactor, in still, one end of upper strata gas phase pipeline extends to the upper position in reactor, the other end of upper strata gas phase pipeline is connected with the input of Venturi tube in still, and the negative pressure of the generation of flowing in Venturi tube by slip is reactor inner top upper strata gas phase again sucting reaction system and react; Oxidant input pipe is connected with the input of Venturi tube, by Venturi tube, sucks oxidant.
In described reactor, be provided with refrigerant inlet pipe and refrigerant and go out pipe formation refrigerant circulation.
Described reactor is connected with exhaust treatment system by vent gas treatment pipe.
The installation site of described Venturi tube is higher than reactor liquid level.
Described circulating pump and the circulation pipe between heat exchanger are provided with sample tap.
Described oxidant input pipe is provided with check-valves.
Beneficial effect of the present invention is: 1, adopt venturi principle, can be in oxidant sucting reaction system, the oxidants such as chlorine can increase, can directly adopt the wet chlorine of electrolyzer outlet to react, can be without technical process such as dry chlorine, compressions, reduce investment, reduce energy consumption, reduce cost.2, the present invention is applicable to the oxidant of gas or liquid form, comprises hydrogen peroxide, chlorate aqueous solution etc., applied widely.3, owing to adopting venturi to suck, by the Forced Dispersion repeatedly of agitator, circulating pump etc. in Venturi tube, still, oxidant dispersion effect in reaction system is good, is uniformly dispersed, and mass transfer is fast, and reaction speed is fast, can enhance productivity.4, adopt the mode of still outer circulation, eliminated in still and stirred dead angle, avoided the halfway situation of reaction to occur.5, by external heat exchanger, reduced thermograde in reaction system, be conducive to produce high-quality product.6, by the absorption reuse of part mutually of still top gas, reduce the loss of catalyst, reduced the generation of the side reaction of reaction middle and later periods.7, in course of reaction, do not need to take out continuously tail gas, reduced discharge of wastewater.8, operating process is simple, and operating surface is clean, environmental friendliness.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Description of reference numerals: reactor 1, refrigerant inlet pipe 2, refrigerant goes out pipe 3, vomit pipe A4, circulating pump 5, Venturi tube 6, upper strata gas phase pipeline 7 in still, heat exchanger 8, vomit pipe B9, agitator 10, vent gas treatment pipe 11, oxidant input pipe 12, sample tap 13, check-valves 14.
The specific embodiment
Below by the specific embodiment, the present invention is further elaborated, and embodiment understands the present invention better by help, but the present invention is not limited only to following embodiment.
As shown in Figure 1, the device of ADC blowing agent is prepared in this self-priming oxidation, comprises reactor 1, is provided with refrigerant inlet pipe 2 and refrigerant and goes out pipe 3 formation refrigerant circulations in described reactor 1, is provided with the agitator 10 being connected with power set in reactor 1.The vomit pipe A4 of described reactor 1 is connected with the input of heat exchanger 8 by circulating pump 5, output one tunnel of heat exchanger 8 is connected with vomit pipe B9, another road is connected with the input of Venturi tube 6, the efferent duct of Venturi tube 6 extends in reactor 1, in still, one end of upper strata gas phase pipeline 7 extends to the upper position in reactor 1, in still, the other end of upper strata gas phase pipeline 7 is connected with the input of Venturi tube 6, by slip in the negative pressure of Venturi tube 6 interior mobile generations reactor 1 inner top upper strata gas phase again sucting reaction system and react, oxidant input pipe 12 is connected with the input of Venturi tube 6, by Venturi tube 6, sucks oxidant.
This device is by utilizing circulating pump to play circulation outward at reactor biruea slip, Venturi tube is installed on circulating line, utilize slip mobile negative pressure producing in Venturi tube that the oxidants such as chlorine are drawn in reaction system, mix with slip, in reaction system, react, ADC slip after having reacted, squeezes into subsequent processing by vomit pipe with circulating pump.Matter Transfer pipe get back to the inherent liquid level of reactor above or following all can, in still, connect upper strata gas phase pipeline 7 in a still and be linked into Venturi tube suction inlet, can make to overflow chlorine etc. and can get back in reaction slurry for what react completely, reduce oxidant consumption.Circulating line is provided with heat exchanger, guarantees the temperature stabilization of reaction system.
The present invention has changed the reaction in still originally as still outer circulation reaction in still into, utilize circulating pump that slip is beaten to circulation, internal circulating load per hour is calculated according to oxidant flux, guarantees that oxidant can pass into smoothly, with meet in production technology oxidant in the unit interval flux peak be as the criterion; Described circulating pump 5 and the circulation pipe between heat exchanger 8 are provided with sample tap 13, can be in course of reaction sample analysis, handled easily.
On circulating line, increase heat exchanger, with the acting in conjunction of still inner coil pipe, by refrigerant, controlled the temperature of reaction system; Heat exchanger material can be selected the corrosion-resistant materials such as stainless steel, titanium, graphite according to oxidant difference, and this installs preferred titanium material.
Venturi tube is installed on circulating line, and the negative pressure producing by slurry circulation is drawn into oxidant in circulating line and mixes with slip, and Venturi tube can be installed one by serial or parallel connection mode and also can be installed a plurality of.The speed that adds of oxidant is controlled according to technological requirement by flowmeter and control valve group, to meet the Peak Flow Rate of technological requirement.Oxidant input pipe 12 is provided with check-valves 14, prevents that the oxidant causing after reaction unit internal pressure raises from refluxing, and causes the jumping cars such as electrolytic cell; The material of this Venturi tube can comprise according to the different choice of oxidant corrosion-resistant, the sludge proof materials such as stainless steel, titanium, lining are moulded, plastics.
In chlorine oxidation process, in still, in top tank air, contain the chlorine that has neither part nor lot in reaction, by connecting upper strata gas phase pipeline 7 in a still, arrive Venturi tube suction inlet, suction by Venturi tube is also drawn into upper strata gas phase in most still in reactor again, reduce and consume, reduce exhaust emissions and vent gas treatment amount.
In getting back to of the mixed slip of oxidant still, slurry outlet can be in still more than liquid level, also can be below liquid level, below liquid level, should guarantee that the negative pressure of Venturi tube generation can overcome the interior liquid-level pressure of still through calculating poor, guarantee that oxidant can normally pass into.The installation site of general Venturi tube 6 is higher than reactor 1 liquid level.
Described reactor 1 is connected with exhaust treatment system by vent gas treatment pipe 11.In course of reaction, need exhaust treatment system to take out tail gas by exhaust fan, this device regulates the control valve group on vent gas treatment pipeline by the pressure sensor in still, keeps still internal pressure balance.
Finally, it should be pointed out that above example is only the more representational example of the present invention.Obviously, technical scheme of the present invention is not limited to above-mentioned example, can also have many distortion, and all distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (6)
1. the device of ADC blowing agent is prepared in a self-priming oxidation, comprise reactor (1), in reactor (1), be provided with the agitator (10) being connected with power set, it is characterized in that: the vomit pipe A(4 of described reactor (1)) by circulating pump (5), be connected with the input of heat exchanger (8), output one tunnel and the vomit pipe B(9 of heat exchanger (8)) be connected, another road is connected with the input of Venturi tube (6), the efferent duct of Venturi tube (6) extends in reactor (1), in still, one end of upper strata gas phase pipeline (7) extends to the upper position in reactor (1), in still, the other end of upper strata gas phase pipeline (7) is connected with the input of Venturi tube (6), the negative pressure flow producing in Venturi tube (6) by slip is reactor (1) inner top upper strata gas phase again sucting reaction system and react, oxidant input pipe (12) is connected with the input of Venturi tube (6), by Venturi tube (6), sucks oxidant.
2. the device of ADC blowing agent is prepared in self-priming oxidation according to claim 1, it is characterized in that: in described reactor (1), be provided with refrigerant inlet pipe (2) and refrigerant and go out pipe (3) formation refrigerant circulation.
3. the device of ADC blowing agent is prepared in self-priming oxidation according to claim 1 and 2, it is characterized in that: described reactor (1) is connected with exhaust treatment system by vent gas treatment pipe (11).
4. the device of ADC blowing agent is prepared in self-priming oxidation according to claim 1, it is characterized in that: the installation site of described Venturi tube (6) is higher than reactor (1) liquid level.
5. the device of ADC blowing agent is prepared in self-priming oxidation according to claim 1, it is characterized in that: the circulation pipe between described circulating pump (5) and heat exchanger (8) is provided with sample tap (13).
6. the device of ADC blowing agent is prepared in self-priming oxidation according to claim 1, it is characterized in that: described oxidant input pipe (12) is provided with check-valves (14).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613814.8A CN103657574A (en) | 2013-11-27 | 2013-11-27 | Device for preparing ADC (azodicarbonamide) foaming agent by self-suction oxidation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310613814.8A CN103657574A (en) | 2013-11-27 | 2013-11-27 | Device for preparing ADC (azodicarbonamide) foaming agent by self-suction oxidation |
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| CN103657574A true CN103657574A (en) | 2014-03-26 |
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| CN201310613814.8A Pending CN103657574A (en) | 2013-11-27 | 2013-11-27 | Device for preparing ADC (azodicarbonamide) foaming agent by self-suction oxidation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437255A (en) * | 2014-11-19 | 2015-03-25 | 江西世龙实业股份有限公司 | Reaction kettle and method for producing ADC foaming agent by biurea oxide |
| CN110575793A (en) * | 2019-09-18 | 2019-12-17 | 中国神华煤制油化工有限公司 | Ethylene glycol esterification prereactor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1173812A (en) * | 1966-04-09 | 1969-12-10 | Basf Ag | Mixing Gases and Liquids with a Liquid Medium |
| CN201906610U (en) * | 2010-11-14 | 2011-07-27 | 潍坊兴潍科技创新咨询服务中心 | Spraying reaction device |
| CN103071444A (en) * | 2013-01-30 | 2013-05-01 | 北京工商大学 | Gas-liquid reaction device |
-
2013
- 2013-11-27 CN CN201310613814.8A patent/CN103657574A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1173812A (en) * | 1966-04-09 | 1969-12-10 | Basf Ag | Mixing Gases and Liquids with a Liquid Medium |
| CN201906610U (en) * | 2010-11-14 | 2011-07-27 | 潍坊兴潍科技创新咨询服务中心 | Spraying reaction device |
| CN103071444A (en) * | 2013-01-30 | 2013-05-01 | 北京工商大学 | Gas-liquid reaction device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437255A (en) * | 2014-11-19 | 2015-03-25 | 江西世龙实业股份有限公司 | Reaction kettle and method for producing ADC foaming agent by biurea oxide |
| CN110575793A (en) * | 2019-09-18 | 2019-12-17 | 中国神华煤制油化工有限公司 | Ethylene glycol esterification prereactor |
| CN110575793B (en) * | 2019-09-18 | 2022-01-28 | 中国神华煤制油化工有限公司 | Ethylene glycol esterification prereactor |
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Application publication date: 20140326 |