CN102020590A - Improved device of low-pressure system of carbon dioxide air stripping urea device - Google Patents
Improved device of low-pressure system of carbon dioxide air stripping urea device Download PDFInfo
- Publication number
- CN102020590A CN102020590A CN200910183383XA CN200910183383A CN102020590A CN 102020590 A CN102020590 A CN 102020590A CN 200910183383X A CN200910183383X A CN 200910183383XA CN 200910183383 A CN200910183383 A CN 200910183383A CN 102020590 A CN102020590 A CN 102020590A
- Authority
- CN
- China
- Prior art keywords
- circulation cooling
- inlet pipe
- cooling water
- water inlet
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses an improved device of a low-pressure system of a carbon dioxide air stripping urea device. The device comprises a low-pressure methylamine condenser, a liquid level tank, a first pump group, a first circulating cooler, a first circulated cooling water inlet pipe and a first circulated cooling water outlet pipe, wherein any section of the first circulated cooling water inlet pipe or the first circulated cooling water outlet pipe is communicated with a water supply tank. In the invention, the water supply tank is additionally arranged to continuously supply water to the system so as to balance the working pressure of low-pressure circulating water; and after the improved device is used, the pressure and the temperature of the system do not greatly fluctuate any more, and the circulating water system cannot be short of water, thereby the operation pressure and the operation temperature of the system are stabilized. A washing section is additionally arranged between the liquid level tank and a subsequent section device, thus system carries less liquid, absorbs less pressure and recovers more energy, the consumption is lowered and the output is increased.
Description
Technical field
The present invention relates to the improvement of carbon dioxide stripping their urea plant in a kind of synthetic ammonia, the urea technique, especially a kind of improved device that can reduce cost, raising output, increase the carbon dioxide stripping their urea plant lp system of benefit.
Background technology
In producing 300000 tons of urea designs per year, lp system is the main bottleneck that restriction is produced, other with the scale urea plant in, lp system has also been passed through transformation many times, but effect is not too obvious.Former low pressure first ammonium condenser system working pressure and temperature fluctuation are big, are difficult to operation, and water temperature has partial deionization water to evaporate after raising, part can produce leakage, often the lack of water phenomenon will occur in the closed cycle cooling system, reduce cooling performance, the production load is heavier simultaneously, consumption is bigger.
Summary of the invention
In order to overcome above-mentioned defective, the invention provides a kind of improved device of carbon dioxide stripping their urea plant lp system, the improved device of this carbon dioxide stripping their urea plant lp system provides cost savings, and improved production output and efficient, and simple in structure, cost is low, easy to implement.
The present invention for the technical scheme that solves its technical problem and adopt is:
A kind of improved device of carbon dioxide stripping their urea plant lp system, comprise low pressure methylamine condenser, level tank, the first pump group, first recirculation cooler, the first circulation cooling water inlet pipe and the first circulation cooling rising pipe, to use direction to be benchmark, one end of one end of the described first circulation cooling water inlet pipe and the first circulation cooling rising pipe is connected with described low pressure methylamine condenser respectively, the other end of the other end of the described first circulation cooling water inlet pipe and the first circulation cooling rising pipe is connected with described first recirculation cooler respectively, the described first pump group is located on any pipeline section of one of the described first circulation cooling water inlet pipe and described first circulation cooling rising pipe, described level tank is connected with described low pressure methylamine condenser, described level tank lower end is connected with metro-methylamine pump, described level tank upper end is connected with follow-up workshop section device, gas-liquid mixture in low pressure methylamine condenser after the recirculated cooling water condensation absorbs enters level tank, liquid phase is sent through metro-methylamine pump, and gas phase rises to follow-up workshop section device.Be communicated with the moisturizing groove on any pipeline section of one of the described first circulation cooling water inlet pipe and described first circulation cooling rising pipe.Increased the moisturizing groove, incessantly system has been carried out moisturizing, operating pressure that can balance low pressure recycle water is transformed no longer fluctuation of back system pressure and temperature, and circulating water system the lack of water phenomenon can not occur, has just stablized the working pressure and the service temperature of system.
Further technical scheme of the present invention is:
The moisturizing exit of described moisturizing groove is provided with current-limiting apparatus.Described current-limiting apparatus is a restriction orifice during concrete enforcement, and restriction orifice dams with it and is used for limiting current, the flow of restriction moisturizing in uninterrupted moisturizing.
To use direction to be benchmark, described moisturizing groove top is provided with overflow port, and described overflow port is communicated to the condensation liquid bath.The overflow water of moisturizing groove flows into the condensation liquid bath, forms circulation, cuts the waste, and has saved the energy.
There are 30～60 meters difference of elevation between any pipeline section of one of the described first circulation cooling water inlet pipe that described moisturizing groove is communicated with it and described first circulation cooling rising pipe.Be embodied as 45 meters, form the discrepancy in elevation, utilize potential energy to be converted into the kinetic energy of water, the moisturizing groove relies on gravity to carry out moisturizing, has saved energy.
Be provided with washing section between described level tank and the described follow-up workshop section device, described washing section comprises washer, second recirculation cooler, the second pump group, the second circulation cooling water inlet pipe and the second circulation cooling rising pipe, to use direction to be benchmark, described washer is positioned at described level tank top, described level tank upper end offers the air outlet, described air outlet is communicated with escape pipe straight up, described washer inside is stretched in the upper end of described escape pipe, described level tank upper end offers the lime set import, described lime set import is communicated with lime set inlet pipe straight up, described washer inside is stretched in the upper end of described lime set inlet pipe, the upper end of described lime set inlet pipe is lower than the upper end of described escape pipe, described washer upper end is connected with described follow-up workshop section device, the top of described washer is provided with shower nozzle, described washer bottom is provided with the circulation fluid outlet, described circulation fluid outlet is lower than the upper end of described lime set inlet pipe, be communicated with the described second circulation cooling water inlet pipe between described shower nozzle and described second recirculation cooler, be communicated with the second circulation cooling rising pipe between described second recirculation cooler and the outlet of described circulation fluid, the described second pump group is located on any pipeline section of one of the described second circulation cooling water inlet pipe and described second circulation cooling rising pipe, is communicated with the pipeline section that is used for replenishing the ammoniacal liquor that contains carbonic acid gas on any pipeline section of the described second circulation cooling water inlet pipe.During concrete enforcement, the ammonia content that contains the ammoniacal liquor of carbonic acid gas is 8%, carbon dioxide content is 5%, liquid in the circulating cooling pipe enters the shower nozzle ejection with the ammoniacal liquor that contains carbonic acid gas that replenishes by the second circulation cooling water inlet pipe, the gas phase of described rising enters washer by escape pipe, absorption partly is condensed, a part that absorbs flows back to level tank by the lime set inlet pipe to be sent through metro-methylamine pump again, another part enters circulation by the circulation fluid outlet, and all the other do not absorb gas phase and still enter follow-up workshop section device.
The invention has the beneficial effects as follows: after having increased the moisturizing groove, system is connected with the moisturizing groove, the moisturizing groove is placed on high 45 meters on the original system, operating pressure that can balance low pressure recycle water, add restriction orifice in moisturizing place, no longer fluctuation of back system pressure and temperature is transformed in uninterrupted moisturizing, circulating water system the lack of water phenomenon can not occur, just stablized the working pressure and the service temperature of system, the overflow water of header tank flows into the condensation liquid bath, forms circulation, cut the waste, saved the energy.Increase washing section, reduce system's band liquid, reduce system's absorption pressure, increased the system recoveries energy, reduced consumption, increased output.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Embodiment
Embodiment:
A kind of improved device of carbon dioxide stripping their urea plant lp system, comprise low pressure methylamine condenser 1, level tank 2, the first pump group 3, first recirculation cooler 4, the first circulation cooling water inlet pipe 5 and the first circulation cooling rising pipe 6, to use direction to be benchmark, one end of one end of the described first circulation cooling water inlet pipe and the first circulation cooling rising pipe is connected with described low pressure methylamine condenser respectively, the other end of the other end of the described first circulation cooling water inlet pipe and the first circulation cooling rising pipe is connected with described first recirculation cooler respectively, the described first pump group is located on any pipeline section of one of the described first circulation cooling water inlet pipe and described first circulation cooling rising pipe, described level tank is connected with described low pressure methylamine condenser, described level tank lower end is connected with metro-methylamine pump, described level tank upper end is connected with follow-up workshop section device, gas-liquid mixture in low pressure methylamine condenser after the recirculated cooling water condensation absorbs enters level tank, liquid phase is sent through metro-methylamine pump, and gas phase rises to follow-up workshop section device.Be communicated with moisturizing groove 7 on any pipeline section of one of the described first circulation cooling water inlet pipe and described first circulation cooling rising pipe.Increased the moisturizing groove, incessantly system has been carried out moisturizing, operating pressure that can balance low pressure recycle water is transformed no longer fluctuation of back system pressure and temperature, and circulating water system the lack of water phenomenon can not occur, has just stablized the working pressure and the service temperature of system.
The moisturizing exit of described moisturizing groove is provided with current-limiting apparatus.Described current-limiting apparatus is a restriction orifice during concrete enforcement, and restriction orifice dams with it and is used for limiting current, the flow of restriction moisturizing in uninterrupted moisturizing.
To use direction to be benchmark, described moisturizing groove top is provided with overflow port, and described overflow port is communicated to the condensation liquid bath.The overflow water of moisturizing groove flows into the condensation liquid bath, forms circulation, cuts the waste, and has saved the energy.
There are 30～60 meters difference of elevation between any pipeline section of one of the described first circulation cooling water inlet pipe that described moisturizing groove is communicated with it and described first circulation cooling rising pipe.Be embodied as 45 meters, form the discrepancy in elevation, utilize potential energy to be converted into the kinetic energy of water, the moisturizing groove relies on gravity to carry out moisturizing, has saved energy.
Be provided with washing section between described level tank and the described follow-up workshop section device, described washing section comprises washer 8, second recirculation cooler 9, the second pump group 10, the second circulation cooling water inlet pipe 11 and the second circulation cooling rising pipe 12, to use direction to be benchmark, described washer is positioned at described level tank top, described level tank upper end offers the air outlet, described air outlet is communicated with escape pipe 16 straight up, described washer inside is stretched in the upper end of described escape pipe, described level tank upper end offers the lime set import, described lime set import is communicated with lime set inlet pipe 17 straight up, described washer inside is stretched in the upper end of described lime set inlet pipe, the upper end of described lime set inlet pipe is lower than the upper end of described escape pipe, described washer upper end is connected with described follow-up workshop section device, the top of described washer is provided with shower nozzle 13, described washer bottom is provided with circulation fluid outlet 14, described circulation fluid outlet is lower than the upper end of described lime set inlet pipe, be communicated with the described second circulation cooling water inlet pipe between described shower nozzle and described second recirculation cooler, be communicated with the second circulation cooling rising pipe between described second recirculation cooler and the outlet of described circulation fluid, the described second pump group is located on any pipeline section of one of the described second circulation cooling water inlet pipe and described second circulation cooling rising pipe, is communicated with the pipeline section 15 that is used for replenishing the ammoniacal liquor that contains carbonic acid gas on any pipeline section of the described second circulation cooling water inlet pipe.During concrete enforcement, the ammonia content that contains the ammoniacal liquor of carbonic acid gas is 8%, carbon dioxide content is 5%, liquid in the circulating cooling pipe enters the shower nozzle ejection with the ammoniacal liquor that contains carbonic acid gas that replenishes by the second circulation cooling water inlet pipe, the gas phase of described rising enters washer by escape pipe, absorption partly is condensed, a part that absorbs flows back to level tank by the lime set inlet pipe to be sent through metro-methylamine pump again, another part enters circulation by the circulation fluid outlet, and all the other do not absorb gas phase and still enter follow-up workshop section device.
The system behind the increase washing section and the comparison of legacy system manufacturing parameter are shown in table one, two:
Table one: the manufacturing parameter of legacy system
Table two: the manufacturing parameter behind the increase washing section
By above-mentioned two table contrasts as can be seen: after lp system has increased washing section, from manufacturing parameter, can obviously find out, high pressure loop pressure has obvious reduction, the low pressure absorption pressure reduces apparent in view, output is increased to 53 tons/hour by about 44 tons/hour of initial driving, consumption drops to 570kg/ ton urea by 590kg/ ton urea, transforms the economic considerable benefit in back thus.As income calculation per year:
Year increases output:
The output that (now hourly output-originally hour constant) * time=one year increases
Output: (53-44) * 24 * 330 (year producing days)=71280 tons
Calculate by 200 yuan of profits of urea per ton:
71280 * 200=1425.6 (ten thousand yuan)
Consume:
Ton urea can reduce liquefied ammonia and consume 20kg, and can save liquefied ammonia every year:
(the former consumption of ton urea-existing consumption) * save hourly output * time=every year now
About liquefied ammonia quantity
(0.590-0.570) * 53 * 24 * 330=8395.2 (ton)
As pressing 2500 yuan of calculating of liquefied ammonia price per ton, can save every year
8395.2 * 2500=2098.8 (ten thousand yuan).
Claims (5)
1. the improved device of a carbon dioxide stripping their urea plant lp system, comprise low pressure methylamine condenser (1), level tank (2), the first pump group (3), first recirculation cooler (4), the first circulation cooling water inlet pipe (5) and the first circulation cooling rising pipe (6), to use direction to be benchmark, one end of one end of the described first circulation cooling water inlet pipe and the first circulation cooling rising pipe is connected with described low pressure methylamine condenser respectively, the other end of the other end of the described first circulation cooling water inlet pipe and the first circulation cooling rising pipe is connected with described first recirculation cooler respectively, the described first pump group is located on any pipeline section of one of the described first circulation cooling water inlet pipe and described first circulation cooling rising pipe, described level tank is connected with described low pressure methylamine condenser, described level tank lower end is connected with metro-methylamine pump, described level tank upper end is connected with follow-up workshop section device, it is characterized in that: described first circulation cooling water inlet pipe and described first circulation are cooled off on any pipeline section of one of rising pipe and are communicated with moisturizing groove (7).
2. the improved device of carbon dioxide stripping their urea plant lp system according to claim 1, it is characterized in that: the moisturizing exit of described moisturizing groove is provided with current-limiting apparatus.
3. the improved device of carbon dioxide stripping their urea plant lp system according to claim 1, it is characterized in that: be benchmark to use direction, described moisturizing groove top is provided with overflow port, and described overflow port is communicated to the condensation liquid bath.
4. the improved device of carbon dioxide stripping their urea plant lp system according to claim 1 is characterized in that: have 30～60 meters difference of elevation between any pipeline section of one of the described first circulation cooling water inlet pipe that described moisturizing groove is communicated with it and described first circulation cooling rising pipe.
5. as the improved device of carbon dioxide stripping their urea plant lp system as described in one of claim 1 to 4, it is characterized in that: be provided with washing section between described level tank and the described follow-up workshop section device, described washing section comprises washer (8), second recirculation cooler (9), the second pump group (10), the second circulation cooling water inlet pipe (11) and the second circulation cooling rising pipe (12), to use direction to be benchmark, described washer is positioned at described level tank top, described level tank upper end offers the air outlet, described air outlet is communicated with escape pipe (16) straight up, described washer inside is stretched in the upper end of described escape pipe, described level tank upper end offers the lime set import, described lime set import is communicated with lime set inlet pipe (17) straight up, described washer inside is stretched in the upper end of described lime set inlet pipe, the upper end of described lime set inlet pipe is lower than the upper end of described escape pipe, described washer upper end is connected with described follow-up workshop section device, the top of described washer is provided with shower nozzle (13), described washer bottom is provided with circulation fluid outlet (14), described circulation fluid outlet is lower than the upper end of described lime set inlet pipe, be communicated with the described second circulation cooling water inlet pipe between described shower nozzle and described second recirculation cooler, be communicated with the second circulation cooling rising pipe between described second recirculation cooler and the outlet of described circulation fluid, the described second pump group is located on any pipeline section of one of the described second circulation cooling water inlet pipe and described second circulation cooling rising pipe, is communicated with the pipeline section (15) that is used for replenishing the ammoniacal liquor that contains carbonic acid gas on any pipeline section of the described second circulation cooling water inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910183383XA CN102020590A (en) | 2009-09-11 | 2009-09-11 | Improved device of low-pressure system of carbon dioxide air stripping urea device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910183383XA CN102020590A (en) | 2009-09-11 | 2009-09-11 | Improved device of low-pressure system of carbon dioxide air stripping urea device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102020590A true CN102020590A (en) | 2011-04-20 |
Family
ID=43862411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910183383XA Pending CN102020590A (en) | 2009-09-11 | 2009-09-11 | Improved device of low-pressure system of carbon dioxide air stripping urea device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102020590A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819365B (en) * | 2014-02-17 | 2015-07-08 | 王庆锋 | CO2 gas-striping parallel /serial connection medium-pressure urea energy-saving and yield-increasing novel technology |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0748794A1 (en) * | 1995-06-16 | 1996-12-18 | The M. W. Kellogg Company | Integrated urea/ammonia process |
| CN1202483A (en) * | 1997-06-13 | 1998-12-23 | 北京展华化工设计事务所 | New-energy-saving and yield-raising urea production process recycling aqueous solution fully and its apparatus |
| EP0796244B1 (en) * | 1995-02-01 | 1999-04-28 | Urea Casale S.A. | Process and plant for the production of urea with high conversion yield and low energy consumption |
| JP2000159519A (en) * | 1998-11-25 | 2000-06-13 | Chiyoda Corp | Plant and method for producing ammonia and urea |
| CN2835227Y (en) * | 2005-07-15 | 2006-11-08 | 宁波远东化工科技有限公司 | Low-pressure treatment device for waste liquid from synthetic ammonia and urea |
| CN101076512A (en) * | 2004-12-09 | 2007-11-21 | 帝斯曼知识产权资产管理有限公司 | Process for increasing the capacity of an existing urea process |
| CN101348447A (en) * | 2008-08-14 | 2009-01-21 | 安徽临泉化工股份有限公司 | Novel process of medium-pressure ammine recovery system for urea water solution complete cycle production |
-
2009
- 2009-09-11 CN CN200910183383XA patent/CN102020590A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0796244B1 (en) * | 1995-02-01 | 1999-04-28 | Urea Casale S.A. | Process and plant for the production of urea with high conversion yield and low energy consumption |
| EP0748794A1 (en) * | 1995-06-16 | 1996-12-18 | The M. W. Kellogg Company | Integrated urea/ammonia process |
| CN1202483A (en) * | 1997-06-13 | 1998-12-23 | 北京展华化工设计事务所 | New-energy-saving and yield-raising urea production process recycling aqueous solution fully and its apparatus |
| JP2000159519A (en) * | 1998-11-25 | 2000-06-13 | Chiyoda Corp | Plant and method for producing ammonia and urea |
| CN101076512A (en) * | 2004-12-09 | 2007-11-21 | 帝斯曼知识产权资产管理有限公司 | Process for increasing the capacity of an existing urea process |
| CN2835227Y (en) * | 2005-07-15 | 2006-11-08 | 宁波远东化工科技有限公司 | Low-pressure treatment device for waste liquid from synthetic ammonia and urea |
| CN101348447A (en) * | 2008-08-14 | 2009-01-21 | 安徽临泉化工股份有限公司 | Novel process of medium-pressure ammine recovery system for urea water solution complete cycle production |
Non-Patent Citations (3)
| Title |
|---|
| 王兵等: "CO2汽提尿素装置低压系统压力控制", 《中氮肥》 * |
| 田一波等: "尿素解吸水解系统技改小结", 《中氮肥》 * |
| 田一波等: "降低低调水温度提高低压吸收效率", 《大氮肥》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819365B (en) * | 2014-02-17 | 2015-07-08 | 王庆锋 | CO2 gas-striping parallel /serial connection medium-pressure urea energy-saving and yield-increasing novel technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104031793A (en) | Energy-saving system for brewing white spirit by recycling steam and brewing method thereof | |
| CN102954617B (en) | Compound heat pump with steam type injection/lithium bromide absorption | |
| CN201545794U (en) | Improved device of low pressure system in carbon dioxide air stripping urea device | |
| CN205164443U (en) | Efficiency of absorb on urea device low pressure absorption tower is improved device | |
| CN107551586B (en) | Device for producing methanol by utilizing bulkhead tower to combine multiple-effect rectification | |
| CN102020590A (en) | Improved device of low-pressure system of carbon dioxide air stripping urea device | |
| CN106045885A (en) | Energy-saving type water solution complete circling urea production system | |
| CN103897760B (en) | Methane purification system | |
| CN204039301U (en) | A kind of carbonic acid gas stripping urea is expanded production device | |
| CN102153107A (en) | Process method for thickening thin ammonia water | |
| CN106045884A (en) | Production system for urea | |
| CN202032783U (en) | Single-stage ammonia water absorption refrigerator | |
| CN102135342A (en) | Single-stage ammonia absorbing refrigerating machine | |
| CN202358920U (en) | Vacuum device of monoammonium phosphate double effect concentration system | |
| CN214694029U (en) | Air inlet system for biogas purification | |
| CN212532809U (en) | Pre-concentration device of urea low-pressure system | |
| CN201301293Y (en) | Imidazole synthesis gas continuous feeding pressure self-control device | |
| CN106679243B (en) | Refrigerating system capable of reducing liquid ammonia consumption | |
| CN106117086A (en) | A kind of energy-saving increasing on total recycle urea plants production system | |
| CN203845968U (en) | Energy-saving urea production device | |
| CN202569934U (en) | Alkali adding system used for dynamic wave device | |
| CN206730554U (en) | The device of isobutylaldehyde is extracted in a kind of butyraldehyde from mixing | |
| CN203373292U (en) | Alcohol washing water progressively-concentrated methanol recovery device | |
| CN203440268U (en) | Heat recovery device in urea production device | |
| CN105949086A (en) | Urea production system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110420 |