CN200940014Y - Apparatus for recovering ammonia from releasing flow from synthetic ammonia tank - Google Patents
Apparatus for recovering ammonia from releasing flow from synthetic ammonia tank Download PDFInfo
- Publication number
- CN200940014Y CN200940014Y CN 200620122544 CN200620122544U CN200940014Y CN 200940014 Y CN200940014 Y CN 200940014Y CN 200620122544 CN200620122544 CN 200620122544 CN 200620122544 U CN200620122544 U CN 200620122544U CN 200940014 Y CN200940014 Y CN 200940014Y
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- China
- Prior art keywords
- gas
- ammonia
- heat exchanger
- liquid separator
- storage tank
- 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.)
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 57
- 238000005057 refrigeration Methods 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims description 19
- 238000009834 vaporization Methods 0.000 claims description 2
- 230000008016 vaporization Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 238000005406 washing Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005915 ammonolysis reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model discloses a new synthetic ammonia storage tank ammonia collection device, and consists essentially of a n-stage of heat exchanger and an air-liquid separator connected in series (n is more than or equal to 2). A precooler and an air-liquid separator are arranged between a No.1 stage heat exchanger and its air-liquid separator and a No.2 stage heat exchanger and its air-liquid separator. The synthetic ammonia storage tank ammonia collection device also includes the expansion refrigeration unit. The outlet of the n-stage air-liquid separator is connected with the n-stage heat exchanger cool agent pipe. At least after one stage of heat exchange, then connected with the inlet of the expansion refrigeration unit. The outlet of the expansion refrigeration unit is connected with the cool agent of the n-stage heat exchanger in sequence. The utility model uses the residual pressure of the storage tank to realize the ammonia collection; the residual of uncollected ammonia is less than 1%. The operation flow is simple and has no water washing procedure, which saves energy.
Description
Technical field
The utility model relates to a kind of device for recovering tail gas, particularly a kind of synthetic ammonia storage tank off-gas ammonia recovery unit.
Background technology
At present, the content of ammonia if directly discharge, not only causes waste generally at 17-62% in the storage tank off-gas of the synthesis ammonia system in chemical plant, and serious environment pollution.At present, ammonia enterprises such as most of fertilizer planies reclaim the ammonia of storage tank off-gas, and method is that off-gas is made ammoniacal liquor through washing, reclaims after steaming ammonia with high temperature again.But this removal process has increased the consumption and the energy consumption of soft water, and low concentration ammoniacal liquor also can't utilize.
The utility model content
Technical problem to be solved in the utility model provides a kind of new synthetic ammonia storage tank off-gas ammonia recovery unit, and this device only utilizes storage tank off-gas self overbottom pressure, only needs a small amount of additionaling power can realize that the ammonia of high concentration reclaims.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of synthetic ammonia storage tank off-gas ammonia recovery unit, mainly comprise n level bonded assembly heat exchanger and gas-liquid separator successively, n 〉=2 wherein, also be connected with a fore cooler and gas-liquid separator between first order heat exchanger and gas-liquid separator and second stage heat exchanger and the gas-liquid separator
Described synthetic ammonia storage tank off-gas ammonia recovery unit also comprises the swell refrigeration unit, the gas vent of n level gas-liquid separator links to each other with the cold medium channel of n level heat exchanger, through after the first-class heat exchanger at least, link to each other with swell refrigeration unit inlet, the outlet of swell refrigeration unit links to each other with the cold medium channel of n level heat exchanger successively.
Wherein, the liquid outlet of n level gas-liquid separator and n-1 level gas-liquid separator links to each other by pipeline, this pipeline also is communicated with the cold medium channel of n-1 level heat exchanger, the cold medium channel of this n-1 level heat exchanger further links to each other with the liquid line of n-2 level gas-liquid separator, introduce again in the cold medium channel of previous stage heat exchanger, and the like, and liquid line is provided with the expenditure and pressure valve; The liquid line of first order gas-liquid separator links to each other with the cold medium channel of first order heat exchanger; Described liquid line is provided with reducing valve; The cold medium channel of described fore cooler connects ammonia machine or the congealing machine that needs the power input or adds liquefied ammonia.
The cold of this storage tank off-gas ammonia recovery unit by minute ammonia after tail gas form by swell refrigeration unit swell refrigeration, the liquefied ammonia reduction vaporization that is recovered to and fore cooler three parts.
The beneficial effect that the utility model can reach is:
1, the utility model synthetic ammonia storage tank off-gas ammonia recovery unit, flow process is simple, and energy consumption is low, utilize mono-storage tank off-gas, only need add small number of external power is the required power of fore cooler, the storage tank off-gas can be reclaimed, and the residual ammonia content of Hui Shouing is not less than 1%;
2, be provided with fore cooler in this device,, can obtain the ammonolysis product of required pressure by changing the precooling temperature of fore cooler, but the pressure that pressure is not higher than ammonia jar off-gas when advancing this regenerative apparatus.
3, the whole recovery device is reasonable in design, the capacity usage ratio height, and do not have washing process, energy savings.
Description of drawings
Fig. 1 is the utility model example structure scheme drawing.
The specific embodiment
Consult Fig. 1,, comprise three grades of heat exchangers and gas-liquid separator and one-level fore cooler and gas-liquid separator for the utility model embodiment synthetic ammonia storage tank off-gas ammonia recovery unit.Be specially bonded assembly first order heat exchanger 1 and gas-liquid separator 4 successively, fore cooler 8 and gas-liquid separator 5, second stage heat exchanger 2 and gas-liquid separator 6, third stage heat exchanger 3 and gas-liquid separator 7.Wherein the unstripped gas of heat exchanger 1 enters the mouth and synthetic ammonia storage tank off-gas pipeline connection.This synthetic ammonia storage tank off-gas ammonia recovery unit also comprises the swell refrigeration unit, and the swell refrigeration unit comprises a pressure-modulation valve 9 and expansion engine 10.The gas vent of afterbody gas-liquid separator 7 links to each other with the cold junction of the cold medium channel of afterbody heat exchanger, through linking to each other with expansion engine unit 9 inlets after 3,2 re-heats of two-stage heat exchanger, the outlet of expansion engine unit 9 connects successively through the cold medium channel in the heat exchanger 3,2,1, provides cold as cold medium.
The technological process of this device is as follows:
1, after off-gas at first passes through the preliminary cooling of first order heat exchanger 1, enters gas-liquid separator 4, under the high situation of ammonia content, from gas-liquid separator 4, can tell the liquefied ammonia of part elevated pressures; All or part of from the liquefied ammonia that this gas-liquid separator is told through being connected to the cold medium channel of first order heat exchanger behind the reducing valve 12, participate in interchange of heat.
2, the gaseous medium that comes out of gas-liquid separator enters fore cooler 8, and after this fore cooler cooling, the temperature of off-gas enters gas-liquid separator 5 after dropping between-20 ℃～-30 ℃, and gas-liquid separator 5 can be isolated a part of liquefied ammonia again;
3, the gaseous state of gas-liquid separator 5 partly then enters second stage heat exchanger 2, and temperature further descends, and enters gas-liquid separator 6, and gas-liquid separator 6 can be isolated a part of liquefied ammonia again;
4, after the gaseous state of gas-liquid separator 6 part enters the 3 further coolings of third stage heat exchanger again, enter gas-liquid separator 7, gas-liquid separator 7 can be isolated a part of liquefied ammonia again;
5, the gaseous state of afterbody gas-liquid separator 7 part is removed expansion engine 9 swell refrigerations after two-stage heat exchanger 6,7 re-heats later, and the cryogenic gas after the expansion backflows successively through heat exchanger 3,2,1, for off-gas provides cold.
For improving capacity usage ratio, in this device, can be at first after the 11 decompression throttlings of expenditure and pressure valve from gas-liquid separator 6 and 7 isolated liquefied ammonia, converge again and together enter heat exchanger 2 as the cold medium that backflows, for off-gas provides cold, this mixing low pressure ammonia converges after through the decompression throttling and enters the cold medium that preposition heat exchanger 4 conducts are backflowed again from come out back and the gas-liquid separator 5 liquefied ammonia told of heat exchanger 2.
If the liquefied ammonia that first order gas-liquid separator 4 is told partly or entirely reduces pressure as required by the cold passage of first order heat exchanger, can further reduce the power consumption of fore cooler, if the post-decompression cold passage that backflows of this cold passage and the follow-up liquefied ammonia of telling converges, then obtain the ammonia of same pressure rating, if singly walk a cold medium channel, then can obtain the ammonia of different pressures grade.
The utility model synthetic ammonia storage tank off-gas ammonia recovery unit can select to be provided with what heat exchanger and gas-liquid separator according to different condition.
Claims (6)
1, a kind of synthetic ammonia storage tank off-gas ammonia recovery unit mainly comprises n level bonded assembly heat exchanger and gas-liquid separator successively, and n 〉=2 wherein is characterized in that:
Also be connected with a fore cooler and gas-liquid separator between first order heat exchanger and gas-liquid separator and second stage heat exchanger and the gas-liquid separator;
Described synthetic ammonia storage tank off-gas ammonia recovery unit also comprises the swell refrigeration unit, the gas vent of n level gas-liquid separator links to each other with the cold medium channel of n level heat exchanger, through after the first-class heat exchanger at least, link to each other with swell refrigeration unit inlet, the outlet of swell refrigeration unit links to each other with the cold medium channel of n level heat exchanger successively.
2, a kind of synthetic ammonia storage tank off-gas ammonia recovery unit according to claim 1, it is characterized in that, the liquid outlet of n level gas-liquid separator and n-1 level gas-liquid separator links to each other by pipeline, this pipeline also is communicated with the cold medium channel of n-1 level heat exchanger, the cold medium channel of this n-1 level heat exchanger further links to each other with the liquid line of n-2 level gas-liquid separator, introduce again in the cold medium channel of previous stage heat exchanger, and the like, and liquid line is provided with the expenditure and pressure valve.
3, a kind of synthetic ammonia storage tank off-gas ammonia recovery unit according to claim 1 is characterized in that the liquid line of first order gas-liquid separator links to each other with the cold medium channel of first order heat exchanger.
4, according to claim 2 or 3 described a kind of synthetic ammonia storage tank off-gas ammonia recovery units, it is characterized in that described liquid line is provided with reducing valve.
5, a kind of synthetic ammonia storage tank off-gas ammonia recovery unit according to claim 1 is characterized in that, the cold medium channel of described fore cooler connects ammonia machine, the congealing machine that needs the power input or adds liquefied ammonia.
6, a kind of synthetic ammonia storage tank off-gas ammonia recovery unit according to claim 1, it is characterized in that, the cold of described storage tank off-gas ammonia recovery unit by minute ammonia after tail gas form by swell refrigeration unit swell refrigeration, the liquefied ammonia reduction vaporization that is recovered to and fore cooler three parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620122544 CN200940014Y (en) | 2006-07-05 | 2006-07-20 | Apparatus for recovering ammonia from releasing flow from synthetic ammonia tank |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200620023209 | 2006-07-05 | ||
| CN200620023209.0 | 2006-07-05 | ||
| CN 200620122544 CN200940014Y (en) | 2006-07-05 | 2006-07-20 | Apparatus for recovering ammonia from releasing flow from synthetic ammonia tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200940014Y true CN200940014Y (en) | 2007-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620122544 Expired - Fee Related CN200940014Y (en) | 2006-07-05 | 2006-07-20 | Apparatus for recovering ammonia from releasing flow from synthetic ammonia tank |
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| CN (1) | CN200940014Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425916A (en) * | 2011-08-30 | 2012-04-25 | 重庆创本深冷天然气有限公司 | Method for preparing liquefied argon by utilizing synthetic-ammonia tail gas and device |
| CN102659135A (en) * | 2012-05-03 | 2012-09-12 | 内蒙古乌拉山化肥有限责任公司 | Method for reducing outlet temperature of secondary gas-liquid separator in process of starting ammonia recovery device |
| CN102679688A (en) * | 2012-05-25 | 2012-09-19 | 贵州开磷（集团）有限责任公司 | Technology for recycling ammonia from synthesis ammonia tail gas |
-
2006
- 2006-07-20 CN CN 200620122544 patent/CN200940014Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425916A (en) * | 2011-08-30 | 2012-04-25 | 重庆创本深冷天然气有限公司 | Method for preparing liquefied argon by utilizing synthetic-ammonia tail gas and device |
| CN102659135A (en) * | 2012-05-03 | 2012-09-12 | 内蒙古乌拉山化肥有限责任公司 | Method for reducing outlet temperature of secondary gas-liquid separator in process of starting ammonia recovery device |
| CN102679688A (en) * | 2012-05-25 | 2012-09-19 | 贵州开磷（集团）有限责任公司 | Technology for recycling ammonia from synthesis ammonia tail gas |
| CN102679688B (en) * | 2012-05-25 | 2014-12-17 | 贵州开磷（集团）有限责任公司 | Technology for recycling ammonia from synthesis ammonia tail gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: PHYSICAL CHEMISTRY TECHNOLOGY INST., CHINESE ACAD Free format text: FORMER OWNER: BEIJING KERUI SAISI GAS LIQUEFACTION TECHNOLOGY CO., LTD. Effective date: 20080229 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Wenchuan Inventor after: Yang Kejian Inventor after: Yang Zhongwei Inventor before: Wang Wenchuan Inventor before: Yang Kejian |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG WENCHUAN; YANG KEJIAN TO: WANG WENCHUAN; YANG KEJIAN; YANG ZHONGWEI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20080229 Address after: Beijing, Zhongguancun, Haidian District, No. 2, north, zip code: 100080 Patentee after: Technical Institute of Physics and Chemistry Chinese Academy of Sciences Address before: Beijing, Zhongguancun, Haidian District, No. 2, north, zip code: 100080 Patentee before: Beijing Cryosys Technical Company of Gas Liquefaction Co.,Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070829 |