CN207537377U - A kind of melamine preparation device - Google Patents
A kind of melamine preparation device Download PDFInfo
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- CN207537377U CN207537377U CN201820486078.2U CN201820486078U CN207537377U CN 207537377 U CN207537377 U CN 207537377U CN 201820486078 U CN201820486078 U CN 201820486078U CN 207537377 U CN207537377 U CN 207537377U
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Abstract
The utility model is related to a kind of melamine preparation devices, belong to melamine preparation device field.Described device includes：Reactor, hot gas cooler, hot-air filter, carrier gas preheater, crystallizer, trap, finished product storage tank, gas-solid separator, Carrier Gas Compressor, Cool gas blower, carrier gas heater, urine scrubbing tower, gas-liquid separator, exhaust system；Reactor, hot gas cooler, hot-air filter, carrier gas preheater, crystallizer, trap, finished product storage tank are sequentially connected by pipeline；Trap is also connect by pipeline with gas-solid separator, urine scrubbing tower respectively, and gas-solid separator is connect with Carrier Gas Compressor, carrier gas preheater is sequentially connected by pipeline；Urine scrubbing tower is connect with gas-liquid separator, and gas-liquid separator connects carrier gas heater, Cool gas blower, exhaust system by pipeline respectively, and carrier gas heater is connected by pipeline with reactor；The utility model reasonable energy utilization；It being capable of 250,000 40 ten thousand kwh of using electricity wisely every year.
Description
Technical field
The utility model is related to melamine preparation device field more particularly to a kind of energy-saving melamine production dresses
It puts.
Background technology
At present, domestic low-pressure process preparation technology of melamine is all using urea as raw material, and technological process is described as follows：
Fusing urea is pumped up adding in mouth to reactor urea, is atomized and enters in reactor under the action of atomization gas, in 0.2-
At a high temperature of 0.6MPa gauge pressures and 350-420 DEG C, through catalyst (generally silica gel or Alusil) effect, reaction generation trimerization
Cyanamide, ammonia, carbon dioxide.Heat needed for reaction is provided by salt melting system.Reactor carrier gas is come from through Carrier Gas Compressor
Ammonia, carbon dioxide gas mixture after boosting.Gaseous product after reaction, by-product and carrier gas recycle big portion through internal cyclone separators
The catalyst powder for dividing air-flow entrainment is last, and into hot gas cooler, temperature is reduced to 300-340 DEG C after road life heat exchange, Ran Houjin
Enter hot-air filter, filter out the solid impurities such as catalyst in air-flow.The dustless gas come out from hot-air filter is by crystallizer
Top enters in crystallizer, is mixed with the 132-150 DEG C of cold process gas come from bottom, temperature is down to 170-220 DEG C, melamine
Amine crystallization is precipitated, and is sent after cyclonic separation is precipitated to packaging.
Contain the complete urea of micro triamine dust and unreacted in gas at the top of from finished product cyclone separator out, into
Enter in liquid urine scrubbing tower, after liquid urine washing, purifying and cooling, temperature is reduced to tri- tunnels of 132-150 DEG CFen：The first via is through carrier gas pressure
By, as reactor carrier gas, the second tunnel returns to crystallization after Cool gas blower boosts after the heating of its preheater after the boosting of contracting machine
Device enters exhaust system as quenching gas, third road；But the shortcomings that this technique is that the utilization to heat is unreasonable：(1) carrier gas
Into needing temperature being heated to 350-420 DEG C using fused salt from 132-150 DEG C before reactor, this needs to consume molten salt furnace big
The heat of amount, increases coal consumption；(2) it is 320-350 DEG C into the temperature of the heat technologic gas of crystallizer, the temperature of process gas is higher,
It needs be cooled to 170-220 DEG C with a large amount of cold air, the air quantity for causing Cool gas blower in this way is big, generally load volume
4-5 times, the power consumption that this has resulted in Cool gas blower is very high, causes the waste of the energy.
To sum up, it is serious to still have energy waste for existing melamine preparation device, can not be by effective recycling etc.
Problem, therefore, it is necessary to study a kind of more energy-efficient melamine preparation devices.
Utility model content
For the above-mentioned prior art the problem of, the utility model be intended to provide a kind of melamine preparation device and
Production technology, compared with prior art, the utility model do not wash a part of cryogenic gas discharged in trap directly
Cooling is washed, but Carrier Gas Compressor boosting is directly entered after the impurity such as gas-solid separator separation dust, then by carrier gas
After preheater with come from hot-air filter reaction gas heat exchange after enter reactor in, can either take away in this way a part from
The heat for the reaction gas that hot-air filter comes further reduces the temperature of reaction gas, reduces melamine knot in reactor
The air quantity of brilliant required Cool gas blower, so as to reduce the energy consumption of Cool gas blower, meanwhile, the raised gas of temperature after heat exchange
Body fluidizes catalyst after entering reactor；While the technological process of production of the utility model is simple, reasonable energy utilization；
Can 250,000-40 ten thousand kwh of using electricity wisely every year, great application prospect.
For achieving the above object, the utility model discloses following technical proposals：
A kind of melamine preparation device, described device include：Reactor, hot gas cooler, hot-air filter, carrier gas are pre-
Hot device, crystallizer, trap, finished product storage tank, gas-solid separator, Carrier Gas Compressor, Cool gas blower, carrier gas heater, urine are washed
Wash tower, gas-liquid separator, exhaust system.
The reactor, hot gas cooler, hot-air filter, carrier gas preheater, crystallizer, trap, finished product storage tank are led to
Piping is sequentially connected.
The trap is also connect by pipeline with gas-solid separator, urine scrubbing tower respectively, the gas-solid separator with
Carrier Gas Compressor connection, carrier gas preheater, carrier gas heater are sequentially connected by pipeline, the carrier gas heater by pipeline and
Reactor connects；The urine scrubbing tower is connect with gas-liquid separator, gas-liquid separator connected respectively by pipeline Cool gas blower,
Exhaust system.
Internal cyclone separators are provided in the reactor, heat exchanger is provided in the hot gas cooler.
The operation principle of the melamine preparation device of the utility model is：
1) fusing urea is pumped into reactor inlet, reaction (air pressure 0.2-0.6MPa, temperature in reactor is entered after atomization
350-420 DEG C, catalyst be silica gel or Alusil), the heat for reacting required is carried by the reaction gas recycled and reactor carrier gas
For that is, fused salt will be sent into reactor, and then be anti-in carrier gas heater after reactor carrier gas and the reaction gas heating of recycling
Heat should be provided, it is 2 that the reactor carrier gas, which is volume ratio,：1 ammonia, carbon dioxide；
2) catalyst fines carried secretly in reaction gas after completion of the reaction, are recycled in the cyclone separator in reactor, so
These gases are imported into hot gas cooler afterwards, reaction gas temperature declines (300-340 DEG C), then will react conductance after road life heat exchange
Enter hot-air filter, further filter out the solid impurities such as catalyst in air-flow；
3) the dustless gas come out from hot-air filter enters knot after carrier gas preheater further cools down (250-300 DEG C)
Brilliant device, and the cold process gas (132-150 DEG C) with entering crystallizer after Cool gas blower pressurizes mixes, mixture temperature is being tied
(170-220 DEG C) further is reduced in brilliant device, after melamine is precipitated in crystallizer, packing device is sent by trap
Finished product storage tank；
4) gaseous mixture enters trap after crystallizer export, is divided into two-way after trap export, the first via (recycles
Reaction gas)：Enter Carrier Gas Compressor after gas-solid separator filters the impurity such as out of dust to boost, then be preheated by carrier gas
Device further heats up gas by fused salt with entering carrier gas heater after the reaction gas heat exchange that hot-air filter imports
(390-420 DEG C) fluidizes catalyst into reactor after heating；Second tunnel：Into in liquid urine scrubbing tower, it is melted liquid
Washing, purifying, cooling are urinated, temperature reduces (132-150 DEG C) by being further divided into two-way after gas-liquid separator：Pass through cold air wind all the way
Crystallizer is returned to after machine boosting as quenching gas, another way enters exhaust system.
Compared with prior art, the utility model achieves following advantageous effect：
(1) device of the utility model does not carry out the gas discharged in trap directly wash cooling, but by gas
Be directly entered Carrier Gas Compressor boosting after the solid separator separation impurity such as dust, then by carrier gas preheater with from hot gas filtration
After the reaction gas heat exchange that device comes, meanwhile, the utility model another part is returned after Cool gas blower boosts crystallizer as
Quenching gas crystallizes for melamine, by the reasonable utilization to above two hot and cold gas, drastically reduces melamine
The consumption and waste of the energy in production process.
(2) while the technological process of production of the utility model is simple, reasonable energy utilization；It is 50,000 tons/year that can make production capacity
Be sparing in the use of coal in melamine plant year 3000-5000 tons, on this basis, can also make the annual using electricity wisely 25 of Cool gas blower
Ten thousand -40 ten thousand kwh, effect highly significant.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not form the improper restriction to the application for explaining the application.
Fig. 1 is the structure diagram of the melamine preparation device of the utility model.
Attached drawing acceptance of the bid, which is remembered, is respectively：1- reactors, 2- hot gas cooler, 3- hot-air filters, 4- carrier gas preheaters, 5- knots
Brilliant device, 6- traps, 7- finished product storage tanks, 8- gas-solid separators, 9- Carrier Gas Compressors, 10- Cool gas blowers, 11- carrier gas heaters,
12- urines scrubbing tower, 13- gas-liquid separators, 14- exhaust systems.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.It is unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
As described in background, existing melamine preparation device serious, the nothing that still has high energy consumption, energy waste
The problems such as method is by effective recycling, therefore, the utility model proposes a kind of melamine preparation device and production technologies；Now tie
Specific embodiment is closed the utility model is further described.
Embodiment 1
As shown in Figure 1, a kind of melamine preparation device, described device include：Reactor 1, hot gas cooler 2, hot gas
Filter 3, carrier gas preheater 4, crystallizer 5, trap 6, finished product storage tank 7, gas-solid separator 8, Carrier Gas Compressor 9, cold air wind
Machine 10, carrier gas heater 11, urine scrubbing tower 12, gas-liquid separator 13, exhaust system 14.
The reactor 1, hot gas cooler 2, hot-air filter 3, carrier gas preheater 4, crystallizer 5, trap 6, finished product
Storage tank 7 is sequentially connected by pipeline.
The trap 6 is also connect by pipeline with gas-solid separator 8, urine scrubbing tower 12 respectively, the gas solid separation
Device 8 is connect with Carrier Gas Compressor 9, carrier gas preheater 4, carrier gas heater 11 are sequentially connected by pipeline, the carrier gas heater
11 are connected by pipeline and reactor 1；The urine scrubbing tower 12 is connect with gas-liquid separator 13, and gas-liquid separator 13 passes through pipe
Road connects Cool gas blower 10, exhaust system 14 respectively.
Internal cyclone separators are provided in the reactor 1, heat exchanger is provided in the hot gas cooler 2.
The foregoing is merely the preferred embodiments of the application, are not limited to the application, for those skilled in the art
For member, the application can have various modifications and variations.All any modifications within spirit herein and principle, made,
Equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (1)
1. a kind of melamine preparation device, it is characterised in that：Described device includes：Reactor, hot gas cooler, hot gas filtration
Device, carrier gas preheater, crystallizer, trap, finished product storage tank, gas-solid separator, Carrier Gas Compressor, Cool gas blower, carrier gas heating
Device, urine scrubbing tower, gas-liquid separator, exhaust system；
The reactor, hot gas cooler, hot-air filter, carrier gas preheater, crystallizer, trap, finished product storage tank pass through pipe
Road is sequentially connected；
The trap is also connect by pipeline with gas-solid separator, urine scrubbing tower respectively, the gas-solid separator and carrier gas
Compressor connection, carrier gas preheater, carrier gas heater are sequentially connected by pipeline, and the carrier gas heater passes through pipeline and reaction
Device connects；The urine scrubbing tower is connect with gas-liquid separator, and gas-liquid separator connects Cool gas blower, tail gas by pipeline respectively
System；
Internal cyclone separators are provided in the reactor, heat exchanger is provided in the hot gas cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486078.2U CN207537377U (en) | 2018-04-08 | 2018-04-08 | A kind of melamine preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820486078.2U CN207537377U (en) | 2018-04-08 | 2018-04-08 | A kind of melamine preparation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207537377U true CN207537377U (en) | 2018-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820486078.2U Active CN207537377U (en) | 2018-04-08 | 2018-04-08 | A kind of melamine preparation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108373454A (en) * | 2018-04-08 | 2018-08-07 | 山东鸿运工程设计有限公司 | A kind of melamine preparation device and production technology |
| CN115010674A (en) * | 2022-07-05 | 2022-09-06 | 山东省舜天化工集团有限公司 | Melamine production resource recycling system and recycling method |
-
2018
- 2018-04-08 CN CN201820486078.2U patent/CN207537377U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108373454A (en) * | 2018-04-08 | 2018-08-07 | 山东鸿运工程设计有限公司 | A kind of melamine preparation device and production technology |
| CN108373454B (en) * | 2018-04-08 | 2023-07-25 | 山东鸿运工程设计有限公司 | Melamine production device and production process |
| CN115010674A (en) * | 2022-07-05 | 2022-09-06 | 山东省舜天化工集团有限公司 | Melamine production resource recycling system and recycling method |
| CN115010674B (en) * | 2022-07-05 | 2023-11-07 | 山东省舜天化工集团有限公司 | Melamine production resource recycling system and recycling method |
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