CN203582506U - Ammonia production system employing urea solution pyrolysis - Google Patents
Ammonia production system employing urea solution pyrolysis Download PDFInfo
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- CN203582506U CN203582506U CN201320742681.XU CN201320742681U CN203582506U CN 203582506 U CN203582506 U CN 203582506U CN 201320742681 U CN201320742681 U CN 201320742681U CN 203582506 U CN203582506 U CN 203582506U
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- urea soln
- urea
- pyrolysis
- pyrolytic reaction
- urea solution
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- 239000004202 carbamide Substances 0.000 title claims abstract description 110
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 105
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 42
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 45
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- 238000012423 maintenance Methods 0.000 claims description 13
- 244000144985 peep Species 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 7
- 208000002925 dental caries Diseases 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 2
- 238000006460 hydrolysis reaction Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000003860 storage Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses an ammonia production system employing urea solution pyrolysis, and is used for solving the problems that the ammonia production system employing urea solution pyrolysis in the prior art is complicated in equipment structure, resulting in complicated ammonia production technology, fussy operation, and low urea pyrolysis efficiency. The ammonia production system comprises an automatic urea feeding elevator, a urea solution preparation system, a delivery pump, a urea solution storage system, a feeding pump and a urea solution pyrolysis system, which are orderly connected, wherein the urea solution preparation system comprises a urea solution preparation tank, an agitator, a first heat exchanger, a first sampling opening and a first vent nozzle; the top of the urea solution preparation tank is connected with the automatic urea feeding elevator and the bottom of the urea solution preparation tank is connected with the delivery pump; the agitator and the first heat exchanger are arranged inside the urea solution preparation tank; the first sampling opening and the first vent nozzle are arranged at the bottom of the urea solution preparation tank. The automatic urea feeding elevator is arranged, so that normal reaction inside the tank can be ensured, and the condition that the reaction is incomplete caused by excessive raw materials, resulting in waste of raw materials is not generated.
Description
Technical field
The utility model relates to a kind of urea soln pyrolysis ammonia system processed.
Background technology
Heat power plant boiler burning produces a large amount of flue gases, wherein NO
xcontent is high, according to the < < fuel-burning power plant atmosphere pollutants emission standards > > requirement of implementing on January 1st, 2012, all fossil fuel fired boiler all must arrange denitrification apparatus, particularly large-sized boiler.The method of its use will be for selective catalytic reduction (SCR method) chemical reaction:
Be that SCR method is used a large amount of ammonia (NH
3).
Ammonia method processed mainly has three kinds of modes, i.e. ammoniacal liquor, liquefied ammonia, urea according to region, envrionment conditions (containing transportation, storage) both at home and abroad at present.
Ammoniacal liquor, liquefied ammonia, the relative liquefied ammonia of ammoniacal liquor is safer, but all belongs to hazardous substance.The blast utmost point root of ammonia steam and air mixture is 15.7%-27.4%, reaches this concentration range and meets naked light energy combustion explosion.Recently, a lot of A leak of liquefied ammonia explosive incidents of domestic appearance have been brought very big injury and psychological burden to people's life, property.And ammoniacal liquor, liquefied ammonia transportation, storage difficulty relatively.
Urea is a kind of colourless or white, nontoxic, harmless chemical, and is easy to transportation, storage.Therefore, it is to expand gradually at present use as feed for ammonia production, and very popular.
According to urea characteristic, process for producing ammonia from urea is divided into hydrolysis and two kinds of methods of pyrolysis.But existing urea pyrolysis ammonia system device structure processed complexity, thus Ammonia Process complexity caused, complex operation, urea pyrolysis efficiency is low.
Utility model content
The purpose of this utility model is to provide a kind of urea soln pyrolysis ammonia system processed, solves the urea pyrolysis system device complex structure processed of prior art, thereby causes Ammonia Process complexity, complex operation, the inefficient problem of urea pyrolysis.
To achieve these goals, the technical solution adopted in the utility model is as follows:
Urea soln pyrolysis ammonia system processed, comprises successively connected urea automatic charging bucket elevator, urea soln preparation system, transferpump, urea soln stocking system, take away pump and urea soln pyrolysis system; Described urea soln preparation system comprises that top prepares case with the urea soln that urea automatic charging bucket elevator is connected, bottom is connected with transferpump, agitator and First Heat Exchanger in being arranged at, and be arranged at the first thief hole and the first drain that urea soln is prepared case bottom.
Further, urea soln pyrolysis system comprises pyrolytic reaction chamber, be arranged at the hot air inlet that adds on top, pyrolytic reaction chamber, be arranged at the product gas outlet of bottom, pyrolytic reaction chamber, be arranged at the urea soln import on top, pyrolytic reaction chamber, be arranged at the indoor atomizing lance being communicated with by urea soln inlet pipe with urea soln import of pyrolytic reaction, and it is indoor and be positioned at the air inlet flow deflector and the air inlet balancing disk that add hot air inlet below, atomizing lance top to be set in turn in pyrolytic reaction; Bottom, described pyrolytic reaction chamber is also provided with maintenance bypass shutdown valve, and the product gas outlet maintenance bypass being connected with maintenance bypass shutdown valve.
Again further, between described product gas outlet and pyrolytic reaction chamber, be also provided with grit chamber, between described grit chamber and pyrolysis reactor furnace, be also provided with grit chamber's shutdown valve.
Further, described air inlet flow deflector is provided with multiple blades that are circular layout and air inlet flow deflector are separated into multiple cavitys.
Preferred as one, described air inlet balancing disk is reticulated structure; Described atomizing lance adopts the shower nozzle of two media.
In order better to realize the utility model, bottom, described pyrolytic reaction chamber is provided with pyrolysis oven peep hole; Described grit chamber is provided with grit chamber's peep hole.
Further, described urea soln stocking system comprises the urea soln bin that top is connected with transferpump, bottom is connected with take away pump, be arranged at the second interchanger in urea soln bin, and be arranged at the second thief hole and second drain of urea soln bin bottom.
Again further, described urea soln is prepared on case and urea soln bin and is equipped with densitometer, liquidometer and thermometer.
In addition, described urea automatic charging bucket elevator is automatic gauge feeding system.
The utility model compared with prior art, has the following advantages and beneficial effect:
(1) the utility model is provided with urea automatic charging bucket elevator, can guarantee to prepare normal reaction in case, and there will not be raw material too much to cause reaction not exclusively, causes the waste of raw material.
(2) the utility model is at the indoor air inlet flow deflector that is provided with of pyrolytic reaction, warm air can be distributed to pyrolytic reaction uniformly after in warm air enters pyrolysis oven indoor by the blade on air inlet flow deflector, guaranteed that urea soln is heated evenly.
(3) the utility model is at the indoor air inlet balancing disk that is also provided with of pyrolytic reaction, and warm air is distributed further, guarantee the effect of warm air reaction balanced with atomize urea solution, steady flow condition, thereby it is complete to realize pyrolysis, prevents slagging scorification effect.
(4) the utility model is also provided with grit chamber in bottom, pyrolytic reaction chamber, can realize timing observation, scarfing cinder, guarantees that system is normal, stable, operation continuously; Also be provided with grit chamber's shutdown valve simultaneously, can realize contacting of partition and pyrolytic reaction chamber, guarantee to remove the issuable slagging scorification of abnormal running, and do not affect normal operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of urea soln pyrolysis system in the utility model.
Fig. 3 is the structural representation of air inlet flow deflector in the utility model.
Fig. 4 is the structural representation of air inlet balancing disk in the utility model.
Wherein, the component name that in accompanying drawing, mark is corresponding is called: 1-urea automatic charging bucket elevator, 2-urea soln is prepared case, 3-agitator, 4-First Heat Exchanger, 5-the first thief hole, 6-the first drain, 7-urea soln bin, 8-the second interchanger, 9-the second thief hole, 10-the second drain, 11-pyrolytic reaction chamber, 12-adds hot air inlet, 13-product gas outlet, the import of 14-urea soln, 15-urea soln inlet pipe, 16-atomizing lance, 17-air inlet flow deflector, 18-air inlet balancing disk, 19-maintenance bypass shutdown valve, 20-product gas outlet maintenance bypass, 21-grit chamber, 22-grit chamber shutdown valve, 23-blade, 24-pyrolysis oven peep hole, 25-grit chamber peep hole, 26-transferpump, 27-take away pump.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and embodiment of the present utility model includes but not limited to the following example.
Embodiment
As shown in Fig. 1～4, urea soln pyrolysis ammonia system processed, comprises successively connected urea automatic charging bucket elevator 1, urea soln preparation system, transferpump 26, urea soln stocking system, take away pump 27 and urea soln pyrolysis system; Described urea soln preparation system comprises that top prepares case 2 with the urea soln that urea automatic charging bucket elevator 1 is connected, bottom is connected with transferpump, agitator 3 and First Heat Exchanger 4 in being arranged at, and be arranged at the first thief hole 5 and the first drain 6 that urea soln is prepared case bottom.By the urea automatic charging bucket elevator of above-mentioned setting, can realize from trend urea soln and prepare in case and add raw material, can guarantee that add-on is suitable, there will not be raw material to add and too much cause reaction not exclusively simultaneously, affect subsequent handling, avoided the waste of raw material simultaneously.Preferred as one, described urea automatic charging bucket elevator is automatic gauge feeding system.
Further, urea soln pyrolysis system comprises pyrolytic reaction chamber 11, what be arranged at top, pyrolytic reaction chamber adds hot air inlet 12, be arranged at the product gas outlet 13 of bottom, pyrolytic reaction chamber, be arranged at the urea soln import 14 on top, pyrolytic reaction chamber, be arranged at the indoor atomizing lance 16 being communicated with by urea soln inlet pipe 15 with urea soln import of pyrolytic reaction, and it is indoor and be positioned at the air inlet flow deflector 17 and the air inlet balancing disk 18 that add hot air inlet below, atomizing lance top to be set in turn in pyrolytic reaction; Bottom, described pyrolytic reaction chamber is also provided with maintenance bypass shutdown valve 19, and the product gas outlet maintenance bypass 20 being connected with maintenance bypass shutdown valve.By above-mentioned setting, when using the utility model, warm air enters from adding hot air inlet, then by air inlet flow deflector and air inlet balancing disk, warm air is evenly distributed to pyrolytic reaction indoor, thereby realize and evenly mix from the urea soln of atomizing lance ejection, it is heated, and there will not be, only heat a part of urea soln, cause pyrolysis incomplete.And the maintenance bypass shutdown valve of above-mentioned setting and product gas outlet maintenance bypass are while there is slagging scorification problem for abnormal running, can remove, and not affect normal operation of the present utility model.
In order to guarantee further normal operation of the present utility model, between described product gas outlet 13 and pyrolytic reaction chamber, be also provided with grit chamber 21, between described grit chamber and pyrolysis reactor furnace, be also provided with grit chamber's shutdown valve 22.When using the utility model, if there is slagging scorification phenomenon very, can slagging scorification be removed by grit chamber, guarantee normal operation of the present utility model, owing to being provided with grit chamber's shutdown valve, so when removing slagging scorification, can not affect the normal operation in pyrolytic reaction, improve pyrolysis efficiency.
More even for what warm air was distributed, preferred as one, described air inlet flow deflector 17 is provided with multiple blades 23 that are circular layout and air inlet flow deflector are separated into multiple cavitys; Described air inlet balancing disk 18 is reticulated structure.By above-mentioned setting, warm air flows to pyrolysis reaction chamber middle part by multiple cavitys of air inlet flow deflector, by cancellated air inlet balancing disk, makes the more balanced of warm air distribution.Thereby assurance further reaction balanced with urea soln.
In order to ensure the complete atomization of urea, described atomizing lance adopts the shower nozzle of two media.
For when using the utility model, can observe the indoor particular case of pyrolytic reaction, bottom, described pyrolytic reaction chamber is provided with pyrolysis oven peep hole 24; In order to guarantee normal operation of the present utility model, described grit chamber is provided with grit chamber's peep hole 25.
Again further, described urea soln stocking system comprises the urea soln bin 7 that top is connected with transferpump, bottom is connected with take away pump, be arranged at the second interchanger 8 in urea soln bin 7, and be arranged at the second thief hole 9 and second drain 10 of urea soln bin 8 bottoms.
In order better to realize the utility model, described urea soln is prepared on case and urea soln bin and is equipped with densitometer, liquidometer and thermometer.
According to above-described embodiment, just can realize well the utility model.What deserves to be explained is; under prerequisite based on said structure design; for solving same technical problem; even if some that make on the utility model are without substantial change or polishing; the essence of the technical scheme adopting is still the same with the utility model, therefore it also should be in protection domain of the present utility model.
Claims (9)
1. urea soln pyrolysis ammonia system processed, is characterized in that, comprises successively connected urea automatic charging bucket elevator (1), urea soln preparation system, transferpump (26), urea soln stocking system, take away pump (27) and urea soln pyrolysis system; Described urea soln preparation system comprises that top prepares case (2) with the urea soln that urea automatic charging bucket elevator (1) is connected, bottom is connected with transferpump, agitator (3) and First Heat Exchanger (4) in being arranged at, and be arranged at the first thief hole (5) and the first drain (6) that urea soln is prepared case bottom; Described urea soln pyrolysis system comprises pyrolytic reaction chamber (11), what be arranged at top, pyrolytic reaction chamber adds hot air inlet (12), be arranged at the product gas outlet (13) of bottom, pyrolytic reaction chamber, be arranged at the urea soln import (14) on top, pyrolytic reaction chamber, be arranged at the indoor atomizing lance (16) being communicated with by urea soln inlet pipe (15) with urea soln import of pyrolytic reaction, and it is indoor and be positioned at the air inlet flow deflector (17) and the air inlet balancing disk (18) that add hot air inlet below, atomizing lance top to be set in turn in pyrolytic reaction; Bottom, described pyrolytic reaction chamber is also provided with maintenance bypass shutdown valve (19), and the product gas outlet maintenance bypass (20) being connected with maintenance bypass shutdown valve.
2. urea soln pyrolysis according to claim 1 ammonia system processed, is characterized in that, is also provided with grit chamber (21) between described product gas outlet (13) and pyrolytic reaction chamber, is also provided with grit chamber's shutdown valve (22) between described grit chamber and pyrolysis reactor furnace.
3. urea soln pyrolysis according to claim 2 ammonia system processed, is characterized in that, described air inlet flow deflector (17) is provided with multiple blades (23) that are circular layout and air inlet flow deflector are separated into multiple cavitys.
4. urea soln pyrolysis according to claim 3 ammonia system processed, is characterized in that, described air inlet balancing disk (18) is reticulated structure.
5. urea soln pyrolysis according to claim 4 ammonia system processed, is characterized in that, described atomizing lance adopts the shower nozzle of two media.
6. urea soln pyrolysis according to claim 5 ammonia system processed, is characterized in that, bottom, described pyrolytic reaction chamber is provided with pyrolysis oven peep hole (24); Described grit chamber is provided with grit chamber's peep hole (25).
7. urea soln pyrolysis according to claim 6 ammonia system processed, it is characterized in that, described urea soln stocking system comprises the urea soln bin (7) that top is connected with transferpump, bottom is connected with take away pump, be arranged at the second interchanger (8) in urea soln bin (7), and be arranged at the second thief hole (9) and second drain (10) of urea soln bin (8) bottom.
8. urea soln pyrolysis according to claim 7 ammonia system processed, is characterized in that, described urea soln is prepared on case and urea soln bin and is equipped with densitometer, liquidometer and thermometer.
9. according to the urea soln hydrolysis ammonia system processed described in claim 1～8 any one, it is characterized in that, described urea automatic charging bucket elevator is automatic gauge feeding system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320742681.XU CN203582506U (en) | 2013-11-22 | 2013-11-22 | Ammonia production system employing urea solution pyrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320742681.XU CN203582506U (en) | 2013-11-22 | 2013-11-22 | Ammonia production system employing urea solution pyrolysis |
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| Publication Number | Publication Date |
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| CN203582506U true CN203582506U (en) | 2014-05-07 |
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| CN201320742681.XU Expired - Lifetime CN203582506U (en) | 2013-11-22 | 2013-11-22 | Ammonia production system employing urea solution pyrolysis |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104474892A (en) * | 2014-12-09 | 2015-04-01 | 邹英奎 | Production method of denitrification powder |
| CN115253963A (en) * | 2022-07-18 | 2022-11-01 | 华能国际电力股份有限公司大连电厂 | Equipment and method for preparing ammonia by urea pyrolysis and separating and purifying |
| CN115259179A (en) * | 2022-07-14 | 2022-11-01 | 华能国际电力股份有限公司大连电厂 | Urea pyrolysis ammonia production system and application method thereof |
-
2013
- 2013-11-22 CN CN201320742681.XU patent/CN203582506U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104474892A (en) * | 2014-12-09 | 2015-04-01 | 邹英奎 | Production method of denitrification powder |
| CN115259179A (en) * | 2022-07-14 | 2022-11-01 | 华能国际电力股份有限公司大连电厂 | Urea pyrolysis ammonia production system and application method thereof |
| CN115253963A (en) * | 2022-07-18 | 2022-11-01 | 华能国际电力股份有限公司大连电厂 | Equipment and method for preparing ammonia by urea pyrolysis and separating and purifying |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The information industry building, No. 159 East loop section of Chengdu Chenghua District 610000 Sichuan province No. 1106 Patentee after: CHENGDU SHIGANG ENERGY SAVING AND ENVIRONMENT PROTECTING ENGINEERING CO., LTD. Address before: The information industry building, No. 159 East loop section of Chengdu Chenghua District 610000 Sichuan province No. 1106 Patentee before: CHENGDU SHIGANG ENVIRONMENTAL PROTECTION ENGINEERING CO., LTD. |