CN203842584U - Device for absorbing and recycling reaction gas in production of ammonium polyphosphate - Google Patents
Device for absorbing and recycling reaction gas in production of ammonium polyphosphate Download PDFInfo
- Publication number
- CN203842584U CN203842584U CN201420277347.6U CN201420277347U CN203842584U CN 203842584 U CN203842584 U CN 203842584U CN 201420277347 U CN201420277347 U CN 201420277347U CN 203842584 U CN203842584 U CN 203842584U
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- CN
- China
- Prior art keywords
- reaction gas
- absorption
- app
- kettle
- circulating air
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Abstract
The utility model discloses a device for absorbing and recycling reaction gas in production of ammonium polyphosphate. The device is characterized by comprising a reaction kettle (10), a blast blower (20) and an absorption kettle (30); an ammonia gas inlet pipe (11), an ammonia gas inlet (12), a reaction gas circulating outlet (13), a reaction gas circulating and returning opening (14) and a heating jacket (15) are arranged outside the reaction kettle (10); a stirrer (17) and a motor (18) are arranged in the reaction kettle (10); the reaction gas circulating outlet (13) is connected to a circulation gas absorbing inlet (32) of the absorption kettle (30) through a pipeline; a circulation gas pumping opening (36) of the absorption kettle (30) is connected to the reaction gas circulating and returning opening (14) of the reaction kettle (10) through a blower (20); the circulation gas absorbing inlet (32), a packing inlet (33), a packing outlet (37) and the circulation gas pumping opening (36) are formed outside the absorption kettle (30); and a material partition plate (35) and packing (34) are arranged in the absorption kettle (30).
Description
Technical field
The utility model relates to a kind of APP and produces reaction gas absorption cycle use device, particularly a kind ofly returns to the technique that reactor recycles after absorbing accessory substance by external circulating system again, belongs to APP production technical field.
Background technology
Ammonium polyphosphate flame retardant is a kind of important nitrogen phosphorus expanding fire retardant.It has the features such as low toxicity, low cigarette, flame retardant effect be good, is widely used in flame retardant area.
The preparation method of APP product mainly contains phosphoric acid-urea method (formula 1), ammonium phosphate salt polymerization (formula 2) urea phosphate and urea method etc.
H
3PO
4+(n-1)CO(NH
2)
2→(NH
4)
n+2P
nO
3n+1+(n-4)NH
3↑ (1)
+(n-1)CO
2↑
2NH
4H
2PO
4+CO(NH
2)
2→(NH
4)
4P
2O
7+(n-1)CO
2↑ (2)
(NH
4)
4P
2O
7+CO(NH
2)
2→2/n(NH
4PO
3)
n+4NH
3↑+CO
2↑
There is following shortcoming in these methods:
(1) existence of the free water in product is unfavorable to the production of APP.The free water containing is large to equipment corrosion on the one hand, easily produces on the other hand side reaction, affects the raising of the APP degree of polymerization, can only produce low polymerization degree product.
(2) as reaction equation 1 and reaction equation 2, along with the carrying out of reaction, the accessory substance CO of generation
2reduce the dividing potential drop of ammonia, be unfavorable for the carrying out of reaction.In APP synthetic reaction, ammonia makes APP at high temperature not resolve into polyphosphoric acid usually used as aminating agent, thereby improves productive rate and the degree of polymerization of APP.But along with the carrying out of reaction, CO in system
2amount increases, and has reduced the dividing potential drop of ammonia, is unfavorable for the generation of APP.Conventionally the measure of taking is in course of reaction, is constantly filled with the CO that fresh ammonia displacement generates
2, the dividing potential drop of raising ammonia.But this method makes material, energy consumption increase on the one hand, and the waste gas producing on the other hand increases, and intractability increases, and also to environmental pollution, brings pressure.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, to provide a kind of APP to produce reaction gas absorption cycle use device, is characterized in moisture and the accessory substance CO of this device in can absorption reaction gas
2, can recycle ammonia simultaneously, reduce the generation of equipment corrosion and side reaction, and reduced the pollution of waste gas to atmospheric environment.
The purpose of this utility model is realized by following technical measures:
APP is produced reaction gas absorption cycle use device and is contained reactor, air blast and absorption kettle, reactor peripheral hardware ammonia inlet tube, ammonia import, reaction gas loop exit, reaction gas circulation feedback outlet and heating jacket; In reactor, establish agitator, motor, reaction gas loop exit absorbs import by pipeline with the circulating air of absorption kettle and is connected; The circulating air of absorption kettle is taken out material mouthful and is connected with the reaction gas circulation feedback outlet of reactor by air blast, and absorption kettle peripheral hardware circulating air absorbs import, filler entrance, filler outlet and circulating air and takes out material mouthful; In absorption kettle, establish material dividing plate and filler.
Described filler is any in solid sodium hydroxide, calcium oxide or potassium hydroxide.
On described ammonia inlet tube, be also provided with on-off valve I.
In the connecting pipe of the circulating air absorption import of described reaction gas loop exit and absorption kettle, be also provided with on-off valve II.
The passage that described circulating air is taken out material mouth and reaction gas circulation feedback outlet is provided with on-off valve III, flowmeter, temperature sensor I, pressure sensor I, aperture control valve.
In described reactor, be also provided with temperature sensor II and pressure sensor II.
The utlity model has following advantage:
The utility model provides a kind of APP to produce reaction gas absorption cycle use device, has realized recycling of ammonia, in initial reaction stage, is filled with after a certain amount of ammonia, and the later stage no longer passes into ammonia.Carrying out along with reaction, contains free water and CO
2reaction cycle gas under the effect of air blast by absorption kettle, wherein free water and CO
2after packing material absorbing and reaction, ammonia concentration and dividing potential drop improve, and are conducive to particularly high polymerization degree APP synthetic of APP.Can in whole course of reaction, no longer pass into ammonia or reduce the number of times that leads to ammonia, reduce the harm of material, energy consumption and reduction pollution from exhaust emission air environmental pollution.
Accompanying drawing explanation
Fig. 1 is that APP is produced reaction gas absorption cycle use device structural representation.
10, reactor, 11, ammonia inlet tube, 12, ammonia import, 13, reaction gas loop exit, 14, reaction gas circulation feedback outlet, 15, heating jacket, 16, temperature sensor II, 17, agitator, 18, motor, 19, pressure sensor II.
111, on-off valve I, 131, on-off valve II.
20, air blast, 21, flowmeter, 22, aperture control valve, 23, temperature sensor I, 24, pressure sensor I, 25, on-off valve III.
30, absorption kettle, 31, pipeline, 32, circulating air absorbs import, 33, filler entrance, 34, filler, 35, material dividing plate, 36, circulating air takes out material mouthful, 37 fillers outlets.
The specific embodiment
Below by embodiment, the utility model is specifically described, but can not be interpreted as the restriction to the utility model protection domain.
Embodiment
As shown in Figure 1, APP is produced reaction gas absorption cycle use device and is contained reactor 10, air blast 20 and absorption kettle 30, and reactor 10 comprises ammonia inlet tube 11, ammonia import 12, reaction gas loop exit 13, reaction gas circulation feedback outlet 14 and electrical heating chuck 15; In reactor 10, establishing agitator 17, motor 18, reaction gas loop exit 13 is connected with the circulating air absorption import 32 of absorption kettle 30 by pipeline 31; The circulating air of absorption kettle 30 is taken out and is expected that mouth 36 is communicated with reaction gas circulation feedback outlet 14 by air blast 20, and absorption kettle 30 comprises that circulating air absorbs import 32 and circulating air is taken out material mouth 36; In absorption kettle 30, establish material dividing plate 35 and filler 34.
Described filler 34 is any in solid sodium hydroxide, calcium oxide or potassium hydroxide.
On described ammonia inlet tube 11, be also provided with on-off valve I 111.
On tube connector 31 roads of the circulating air absorption import 32 of described reaction gas loop exit 13 and absorption kettle 30, be also provided with on-off valve II 131.
The passage that described circulating air is taken out material mouth 36 and reaction gas circulation feedback outlet 14 is provided with on-off valve III 25, flowmeter 21, temperature sensor I 23, pressure sensor I 24, aperture control valve 22.
In described reactor 10, be also provided with temperature sensor II 16 and pressure sensor II 19.
The utility model is achieved in that
From ammonia import 12, charged pressure is 0.5～1.5MPa ammonia, closes on-off valve I 111, stop rushing ammonia, start power supply, motor 18 drives agitator 17, be warming up to gradually 200～300 ℃, ammonia starts to react with ammonium dihydrogen phosphate (ADP), urea material, produces accessory substance carbon dioxide and water simultaneously; Start air blast 20, reaction gas autoreaction gas loop exit 13 enters absorption kettle 30 by pipeline 31; The reaction gas entering is removed H through absorption and the reaction of filler 34
2o and CO
2after, by circulating air, take out material mouth 36, through air blast 20, from reaction gas circulation feedback outlet 14, send in reactor 10, circular response and utilization again, has solved and in APP building-up process, has repeatedly rushed the defect that ammonia causes environmental pollution, reduces supplies consumption and equipment corrosion.
Claims (6)
1. an APP is produced reaction gas absorption cycle use device, it is characterized in that this device contains reactor (10), air blast (20) and absorption kettle (30), reactor (10) peripheral hardware ammonia inlet tube (11), ammonia import (12), reaction gas loop exit (13), reaction gas circulation feedback outlet (14) and heating jacket (15); In reactor (10), establish agitator (17), motor (18), reaction gas loop exit (13) absorbs import (32) by pipeline (31) with the circulating air of absorption kettle (30) and is connected; The circulating air of absorption kettle (30) is taken out material mouthful (36) and is connected with the reaction gas circulation feedback outlet (14) of reactor (10) by air blast (20), and absorption kettle (30) peripheral hardware circulating air absorbs import (32), filler entrance (33), filler outlet (37) and circulating air and takes out material mouthful (36); In absorption kettle (30), establish material dividing plate (35) and filler (34).
2. APP as claimed in claim 1 is produced reaction gas absorption cycle use device, it is characterized in that filler (34) is any in solid sodium hydroxide, calcium oxide or potassium hydroxide.
3. APP is produced reaction gas absorption cycle use device as claimed in claim 1, it is characterized in that being also provided with on ammonia inlet tube (11) on-off valve I (111).
4. APP is produced reaction gas absorption cycle use device as claimed in claim 1, and the circulating air that it is characterized in that reaction gas loop exit (13) and absorption kettle (30) absorbs on tube connector (31) road of import (32) and is also provided with on-off valve II (131).
5. APP is produced reaction gas absorption cycle use device as claimed in claim 1, it is characterized in that circulating air takes out the passage of material mouthful (36) and reaction gas circulation feedback outlet (14) and be provided with on-off valve III (25), flowmeter (21), temperature sensor I (23), pressure sensor I (24), aperture control valve (22).
6. APP is produced reaction gas absorption cycle use device as claimed in claim 1, it is characterized in that being also provided with in reactor (10) temperature sensor II (16) and pressure sensor II (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277347.6U CN203842584U (en) | 2014-05-28 | 2014-05-28 | Device for absorbing and recycling reaction gas in production of ammonium polyphosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420277347.6U CN203842584U (en) | 2014-05-28 | 2014-05-28 | Device for absorbing and recycling reaction gas in production of ammonium polyphosphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203842584U true CN203842584U (en) | 2014-09-24 |
Family
ID=51555649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420277347.6U Expired - Fee Related CN203842584U (en) | 2014-05-28 | 2014-05-28 | Device for absorbing and recycling reaction gas in production of ammonium polyphosphate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203842584U (en) |
-
2014
- 2014-05-28 CN CN201420277347.6U patent/CN203842584U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20170528 |